CN113012647B

CN113012647B - Display device and backlight light source control method

Info

Publication number: CN113012647B
Application number: CN201911330346.7A
Authority: CN
Inventors: 李见; 庞震华; 李双双
Original assignee: Hisense Visual Technology Co Ltd
Current assignee: Hisense Visual Technology Co Ltd
Priority date: 2019-12-20
Filing date: 2019-12-20
Publication date: 2022-05-27
Anticipated expiration: 2039-12-20
Also published as: CN113012647A

Abstract

The application provides a display device and a backlight light source control method. The method comprises the following steps: after receiving the starting-up instruction, the controller controls the first power circuit to send a first signal for indicating the backlight driving circuit to supply power to a backlight source in a first area in the backlight assembly, and sends a third signal for adjusting the brightness of the backlight source in the backlight assembly to the backlight driving circuit, and controls the second power circuit to send a second signal for indicating the backlight driving circuit to a backlight source in a second area in the backlight assembly to the backlight driving circuit, wherein the first area and the second area form a display area of the display screen. And after the preset time length, the backlight driving circuit controls the backlight source in the backlight assembly to be turned on. Therefore, the backlight light source of the whole display area of the display screen is turned on simultaneously, and backlight brightness and darkness control of the display screen is integrated.

Description

Display device and backlight light source control method

Technical Field

The present application relates to the field of display technologies, and in particular, to a display device and a backlight source control method.

Background

With the continuous development of science and technology and economy, the living standard of people is higher and higher. For example, it is desirable that display devices such as televisions have better image quality and achieve brightness indicators. If a single power supply architecture is adopted to supply power to the display device, it is difficult to select a proper power supply with low cost. If the dual-power architecture is adopted to realize the power supply of the display equipment, the actual requirements of people can be met.

In order to balance the power supply of the dual power panel, the display device generally collects the regional backlight power supply. However, the display device cannot simultaneously turn on the backlight of the display area of the display device, causing a phenomenon that a part of the area of the display device is bright and the remaining area is dark.

Content of application

The application provides a display device and a backlight light source control method, which aim to solve the problem that in the prior art, the display device cannot simultaneously turn on the backlight of the display area of the display device, so that part of the area of the display device is bright and the rest of the area of the display device is dark.

In some embodiments, the present application provides a display device comprising:

a display screen configured to display image content;

a backlight assembly configured to provide a backlight light source to the display screen;

the first power supply circuit is configured to supply power to the backlight source of the first area of the display screen;

the second power supply circuit is configured to supply power to the backlight source of the second area of the display screen;

the controller is configured to control the first power supply circuit to send a first signal to the backlight driving circuit, control the second power supply circuit to send a second signal to the backlight driving circuit, and send a third signal to the backlight driving circuit after receiving a starting-up instruction.

In some embodiments, the backlight driving circuit is configured to control a backlight light source in the backlight assembly to be turned on based on the first signal, the third signal and the second signal after a preset time period.

In some embodiments, the controller is configured to send a first state of a control signal to the first power circuit after receiving the power-on instruction;

the first power supply circuit is configured to supply power to the backlight driving circuit and supply power of a backlight light source in the backlight assembly to the backlight driving circuit when receiving a first state of the control signal;

the backlight driving circuit is configured to receive the first signal from the first power supply circuit after the first power supply circuit supplies power to the backlight driving circuit.

In some embodiments, the first power circuit is further configured to provide power to the controller upon receiving a first state of the control signal;

the controller is further configured to send the third signal to the backlight driving circuit after the first power supply circuit supplies power to the controller.

In some embodiments, the first power circuit is further configured to, upon receiving the first state of the control signal, provide power to the second power circuit, and send the first state of the control signal to the second power circuit;

the second power supply circuit is configured to send the second signal to the backlight driving circuit when receiving the first state of the control signal.

In some embodiments, the display device further comprises a TCON circuit,

the TCON circuit is used for preparing image content required to be displayed;

the controller is further configured to control the second power circuit to supply power to the TCON circuit after receiving a power-on instruction.

In some embodiments, the first signal is used to instruct the backlight driving circuit to supply power to backlight light sources in a first area of the backlight assembly, the second signal is used to instruct the backlight driving circuit to supply power to backlight light sources in a second area of the backlight assembly, and the third signal is used to adjust the brightness of the backlight light sources in the backlight assembly.

In some embodiments, the third signal includes a PWM signal and/or a localdiming signal, wherein the PWM signal is used to control the overall brightness of the backlight light source, and the localdiming signal is used to control the local brightness of the backlight light source based on the image content displayed by the display screen.

In some embodiments, after the TCON circuit is powered, the controller is further configured to send a handshake signal to the TCON circuit;

after the TCON circuit receives the handshake signals, the controller is further configured to send a VbyOne display signal to the TCON circuit.

In some embodiments, the present application provides a backlight light source control method, applied to a display device, where the display device includes: the display screen, the backlight component, the power supply component and the backlight driving circuit;

a display screen configured to display image content;

a power supply assembly configured to provide electrical energy, the power supply assembly comprising a first power circuit and a second power circuit;

the method comprises the following steps:

after receiving a starting-up instruction, the controller controls the first power supply circuit to send a first signal to the backlight driving circuit; the controller controls the second power supply circuit to send a second signal to the backlight driving circuit, and the controller sends a third signal to the backlight driving circuit.

a display screen configured to display image content;

the controller is configured to control the first power supply circuit to send a first signal to the backlight driving circuit after receiving a power-on instruction, wherein the first signal is used for instructing the backlight driving circuit to supply power to a backlight light source in a first area in the backlight assembly, and sending a third signal to the backlight driving circuit, the third signal is used for adjusting the brightness of the backlight light source in the backlight assembly, and the second power supply circuit is used for instructing the backlight driving circuit to send a second signal to the backlight driving circuit, the second signal is used for instructing the backlight driving circuit to supply power to a backlight light source in a second area in the backlight assembly, and the first area and the second area form a display area of the display screen;

the backlight driving circuit is configured to control a backlight light source in the backlight assembly to be turned on based on the first signal, the third signal and the second signal after a preset time period.

the first power supply circuit is configured to supply power to the backlight driving circuit and supply power to a backlight light source in the backlight assembly to the backlight driving circuit when receiving a first state of the control signal;

In some embodiments, the first power circuit is further configured to, upon receiving the first state of the control signal, supply power to the second power circuit and to send the first state of the control signal to the second power circuit;

In some embodiments, the controller is configured to send a second state of the control signal to the first power circuit upon receiving a standby instruction;

the first power supply circuit is configured to stop supplying power to a backlight light source in the backlight assembly to the backlight driving circuit when receiving a second state of the control signal; and then stopping supplying power to the backlight driving circuit.

In some embodiments, the preset duration is a difference between the first time and the second time;

the first time is the time when the first signal and the third signal are received respectively, and the second time is the time when the second signal is received.

In some embodiments, the preset time period is a difference value between the third time and the second time;

the second time is the time when the second signal is received, and the third time is the time when a backlight light source in the backlight assembly is controlled to be turned on based on the first signal, the third signal and the second signal.

In some embodiments, the present application provides a backlight light source control method, applied to a display device, where the display device includes: the display screen, the backlight component, the power supply component and the backlight driving circuit; a display screen configured to display image content; a backlight assembly configured to provide a backlight light source to the display screen; a power supply assembly configured to provide electrical energy, the power supply assembly comprising a first power circuit and a second power circuit;

the method comprises the following steps:

after receiving a starting-up instruction, the controller controls the first power supply circuit to send a first signal to the backlight driving circuit, wherein the first signal is used for indicating the backlight driving circuit to supply power to a backlight light source in a first area in the backlight assembly;

the controller sends a third signal to the backlight driving circuit, wherein the third signal is used for adjusting the brightness of a backlight light source in the backlight assembly;

the controller controls the second power supply circuit to send a second signal to the backlight driving circuit, the second signal is used for indicating the backlight driving circuit to supply power to a backlight light source in a second area in the backlight assembly, and the first area and the second area form a display area of the display screen;

and after the backlight driving circuit is subjected to preset duration, controlling a backlight source in the backlight assembly to be turned on based on the first signal, the third signal and the second signal.

In some embodiments, the controlling the first power circuit to send a first signal to the backlight driving circuit after receiving the power-on command by the controller includes:

after receiving the starting-up instruction, the controller sends a first state of a control signal to the first power circuit;

when the first power supply circuit receives the first state of the control signal, the first power supply circuit supplies power to the backlight driving circuit and supplies power of a backlight light source in the backlight assembly to the backlight driving circuit;

the backlight driving circuit receives the first signal from the first power circuit after the first power circuit supplies power to the backlight driving circuit.

In some embodiments, the method further comprises:

the first power supply circuit supplies power to the controller when receiving a first state of the control signal;

and the controller sends the third signal to the backlight driving circuit after the first power supply circuit supplies power to the controller.

In some embodiments, the method further comprises:

when the first power supply circuit receives the first state of the control signal, the first power supply circuit supplies power to the second power supply circuit, and sends the first state of the control signal to the second power supply circuit;

and the second power supply circuit sends the second signal to the backlight driving circuit when receiving the first state of the control signal.

In some embodiments, the method further comprises:

the controller sends a second state of the control signal to the first power circuit when receiving a standby instruction;

when the first power supply circuit receives the second state of the control signal, the first power supply circuit stops supplying power to the backlight driving circuit for the backlight light source in the backlight assembly; and then stopping supplying power to the backlight driving circuit.

According to the display device and the backlight source control method, the controller is used for controlling the first power supply circuit to send the first signal to the backlight driving circuit after receiving the starting-up instruction. The controller sends a third signal to the backlight driving circuit after being powered. The controller controls the second power circuit to send a second signal to the backlight driving circuit.

In the application, based on dual power supply architecture, carry out the time delay of being shaded through backlight drive circuit, be favorable to backlight drive circuit when receiving the signal that is used for instructing the partial backlight source power supply that lies in the display area in the backlight assembly, be used for instructing the signal that lies in the remaining backlight source power supply of display area in the group subassembly of being shaded and be used for adjusting the signal that lies in the luminance of the backlight source of display area, can open the whole backlight source of display area of display screen simultaneously, make the backlight brightness control of display screen possess the wholeness, user's viewing experience has been improved, display device's picture quality has been ensured, make display device's luminance index satisfy the demonstration demand.

Drawings

In order to more clearly illustrate the technical solutions in the present application or the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without inventive exercise.

FIG. 1 is a schematic diagram of an operational scenario between a display device and a control apparatus;

FIG. 2a is a diagram illustrating a hardware structure of a hardware system in the display device of FIG. 1;

FIG. 2b is a diagram illustrating a hardware structure of a hardware system in a display device;

FIG. 3 is a schematic diagram illustrating a connection relationship between the power board and the load in FIG. 2 a;

FIG. 4 is a schematic diagram of a power architecture of FIG. 2 a;

FIG. 5 is a block diagram of a hardware architecture of the display device of FIG. 2 a;

FIG. 6 is a schematic diagram of a functional configuration of the display device of FIG. 2 a;

fig. 7 is a schematic structural diagram of a display device according to an embodiment of the present application;

fig. 8 is a schematic signaling interaction diagram of a backlight source method according to an embodiment of the present application;

fig. 9 is a timing diagram of a first signal, a third signal and a second signal according to an embodiment of the present disclosure.

Detailed Description

The technical solutions in the embodiments of the present application will be described clearly and completely with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

The terms "first," "second," "third," "fourth," and the like in the description and in the claims of the present application and in the drawings described above, if any, are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the application described herein are, for example, capable of operation in sequences other than those illustrated or otherwise described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.

The display device provided by the embodiments of the present application may have a display device of a single system and a single display structure. For example, the display device includes: a display screen configured to display a screen image; a sound reproducing device configured to play sound; and a power supply circuit configured to supply power to a load of the display device, the load including the display screen, the sound reproducing apparatus, and the like.

Alternatively, the present application is mainly directed to a sound-picture synchronization process of a display device having a dual-system and dual-display structure, that is, a display device having a first controller (a first hardware system), a second controller (a second hardware system), a first display screen, and a second display screen, and the structure, function, implementation, and the like of the display device having the dual-system hardware structure will be described in detail below.

For the convenience of users, various external device interfaces are usually provided on the display device to facilitate connection of different peripheral devices or cables to implement corresponding functions. When a high-definition camera is connected to an interface of the display device, if a hardware system of the display device does not have a hardware interface of a high-pixel camera that receives the source code, data received by the camera cannot be displayed on a display screen of the display device.

Moreover, due to the hardware structure, the hardware system of the conventional display device only supports one hard decoding resource, and usually can support video decoding with a maximum resolution of 4K, so when a user wants to perform video chat while watching a network television, the user needs to use the hard decoding resource (usually a GPU in the hardware system) to decode the network video without reducing the definition of the network video screen, and in this case, the user can only process the video chat screen by using a general-purpose processor (e.g. a CPU) in the hardware system to perform soft decoding on the video.

The soft decoding is adopted to process the video chat picture, so that the data processing burden of a CPU (central processing unit) can be greatly increased, and when the data processing burden of the CPU is too heavy, the problem of picture blocking or unsmooth flow can occur. Further, due to the data processing capability of the CPU, when the CPU performs soft decoding on the video chat screen, multi-channel video calls cannot be generally implemented, and when a user wants to perform video chat with multiple other users in the same chat scene, access is blocked.

In view of the above aspects, to overcome the above drawbacks, the present application discloses a dual-system hardware system architecture to implement multiple channels of video chat data (at least one channel of local video).

The concept to which the present application relates will be first explained below with reference to the drawings. It should be noted that the following descriptions of the concepts are only for the purpose of facilitating understanding of the contents of the present application, and do not represent limitations on the scope of the present application.

The term "module," as used in various embodiments of the present application, may refer to any known or later developed hardware, software, firmware, artificial intelligence, fuzzy logic, or combination of hardware and/or software code that is capable of performing the functionality associated with that element.

The term "remote control" as used in the embodiments of the present application refers to a component of an electronic device (such as the display device disclosed in the present application) that is capable of wirelessly controlling the electronic device, typically over a short distance. The component may typically be connected to the electronic device using infrared and/or Radio Frequency (RF) signals and/or bluetooth, and may also include functional modules such as WiFi, wireless USB, bluetooth, motion sensors, etc. For example: the hand-held touch remote controller replaces most of the physical built-in hard keys in the common remote control device with the user interface in the touch screen.

The term "user interface" as used in the embodiments of the present application is a media interface for interaction and information exchange between an application or operating system and a user, which enables conversion between an internal form of information and a user-acceptable form. A commonly used presentation form of the user interface is a Graphical User Interface (GUI), which refers to a user interface related to computer operations and displayed in a graphical manner. It may be an interface element such as an icon, a window, a control, etc. displayed in the display screen of the electronic device, where the control may include a visual interface element such as an icon, a button, a menu, a tab, a text box, a dialog box, a status bar, a navigation bar, a Widget, etc.

The term "gesture" as used in the embodiments of the present application refers to a user behavior used to express an intended idea, action, purpose, or result through a change in hand shape or an action such as hand movement.

The term "hardware system" used in the embodiments of the present application may refer to a physical component having computing, controlling, storing, inputting and outputting functions, which is formed by a mechanical, optical, electrical and magnetic device such as an Integrated Circuit (IC), a Printed Circuit Board (PCB) and the like. In various embodiments of the present application, a hardware system may also be referred to as a motherboard (or chip).

Fig. 1 is a schematic diagram illustrating an operation scenario between a display device and a control apparatus according to an embodiment. As shown in fig. 1, a user may operate the display apparatus 200 through the control device 100.

The control device 100 may be a remote controller 100A, which can communicate with the display device 200 through an infrared protocol communication, a bluetooth protocol communication, a ZigBee (ZigBee) protocol communication, or other short-range communication, and is used to control the display device 200 in a wireless or other wired manner. The user may input a user instruction through a key on the remote controller 100A, voice input, control panel input, or the like to control the display apparatus 200. Such as: the user can input a corresponding control command through a volume up/down key, a channel control key, up/down/left/right movement keys, a voice input key, a menu key, a power on/off key, etc. on the remote controller 100A to control the functions of the display device 200.

The control device 100 may also be an intelligent device, such as a mobile terminal 100B, a tablet computer, a notebook computer, and the like, which may communicate with the display device 200 through a Local Area Network (LAN), a Wide Area Network (WAN), a Wireless Local Area Network (WLAN), or other networks, and implement control of the display device 200 through an application program corresponding to the display device 200. For example, the display device 200 is controlled using an application program running on the smart device. The application may provide various controls to the User through an intuitive User Interface (UI) on a screen associated with the smart device.

For example, the mobile terminal 100B and the display device 200 may each have a software application installed thereon, so that connection communication between the two can be realized through a network communication protocol, and the purpose of one-to-one control operation and data communication can be further realized. Such as: a control instruction protocol can be established between the mobile terminal 100B and the display device 200, a remote control keyboard is synchronized to the mobile terminal 100B, and the function of controlling the display device 200 is realized by controlling a user interface on the mobile terminal 100B; the audio and video content displayed on the mobile terminal 100B may also be transmitted to the display device 200, so as to implement a synchronous display function.

As shown in fig. 1, the display apparatus 200 may also perform data communication with the server 300 through various communication means. In various embodiments of the present application, the display device 200 may be allowed to be in a wired or wireless communication connection with the server 300 via a local area network, a wireless local area network, or other network. The server 300 may provide various contents and interactions to the display apparatus 200.

Illustratively, the display device 200 receives software Program updates, or accesses a remotely stored digital media library by sending and receiving information, and Electronic Program Guide (EPG) interactions. The servers 300 may be a group or groups, and may be one or more types of servers. Other web service contents such as a video on demand and an advertisement service are provided through the server 300.

The display device 200 includes: the display device comprises a first display screen 201 and a second display screen 202, wherein the first display screen 201 and the second display screen 202 are independent from each other, and a double-hardware control system is adopted between the first display screen 201 and the second display screen 202.

The first display 201 and the second display 202 may be used to display different display screens. For example, the first display screen 201 may be used for screen display of conventional television programs, and the second display screen 202 may be used for screen display of auxiliary information such as notification type messages, voice assistants, and the like.

In some embodiments, the content displayed on the first display screen 201 and the content displayed on the second display screen 202 may be independent of each other. For example, when the first display screen 201 plays a television program, the second display screen 202 may display information such as time, weather, temperature, a reminder message, and the like, which are not related to the television program.

In some embodiments, there may also be an association between the content displayed by the first display screen 201 and the content displayed by the second display screen 202. For example, when the first display screen 201 plays a main screen of a video chat, the second display screen 202 may display information such as a head portrait, a chat duration, and the like of a user currently accessing the video chat.

In some embodiments, some or all of the content displayed by the second display screen 202 may be adjusted to the first display screen 201. For example, when the first display 201 plays a main screen of a video chat, information such as time, weather, temperature, and a reminder message displayed on the second display 202 may be adjusted to the first display 201 to be displayed, and the second display 202 may display other information.

In addition, the first display screen 201 displays a multi-party interactive picture while displaying a traditional television program picture, and the multi-party interactive picture does not block the traditional television program picture. The display mode of the traditional television program picture and the multi-party interactive picture is not limited by the application. For example, the position and the size of the traditional television program picture and the multi-party interactive picture can be set according to the priority of the traditional television program picture and the multi-party interactive picture.

Taking the example that the priority of the traditional television program picture is higher than that of the multi-party interactive picture, the area of the traditional television program picture is larger than that of the multi-party interactive picture, and the multi-party interactive picture can be positioned on one side of the traditional television program picture and can also be arranged in any area of the traditional television program picture in a floating manner.

The display device 200, on one hand, may be a liquid crystal display, an oled (organic Light Emitting diode) display, or a projection display device; in another aspect, the display device may be a smart television or a display system of a display and a set-top box. The specific display device type, size, resolution, etc. are not limiting, and those skilled in the art will appreciate that the display device 200 may be modified in performance and configuration as desired.

The display apparatus 200 may additionally provide an intelligent network tv function that provides a computer support function in addition to the broadcast receiving tv function. Examples include a web tv, a smart tv, an Internet Protocol Tv (IPTV), and the like. In some embodiments, the display device may not have a broadcast receiving television function.

As shown in fig. 1, a camera may be connected or disposed on the display device 200, and is used for presenting a picture taken by the camera on a display interface of the display device or other display devices, so as to implement an interactive chat between users. Specifically, the picture shot by the camera can be displayed on the display device in a full screen mode, a half screen mode or any optional area.

As a connection mode in some embodiments, the camera is connected with the rear shell of the display device through the connection board, and is fixedly installed in the middle of the upper side of the rear shell of the display device.

As another way of connection in some embodiments, the camera is connected to the rear housing of the display device through a connection board or other conceivable connector, which is capable of being lifted up and down, and the connector is provided with a lifting motor, and when the user wants to use the camera or has an application program to use the camera, the camera is lifted up from the display device, and when the user does not need to use the camera, the camera can be embedded in the rear housing, so that the camera is protected from being damaged and the privacy security of the user is protected.

As an embodiment, the camera adopted in the present application may have 1700 ten thousand pixels, so as to achieve the purpose of ultra high definition display. In actual use, cameras higher or lower than 1700 ten thousand pixels may also be used.

When the camera is installed on the display device, the contents displayed in different application scenes of the display device can be fused in various different modes, so that the function which cannot be realized by the traditional display device is achieved.

Illustratively, a user can conduct a video chat with at least one other user while watching a video program via a display device. In the display device, the presentation of the video program can be used as a background picture, and a window for video chat is displayed on the background picture. The vivid display device can be called as a display device with the function of 'watching while chatting'.

In some embodiments, in an application scenario of "chat while watching", a user performs at least one video chat across terminals while watching a live video or a network video through a display device.

In another example, a user can engage in a video chat with at least one other user via a display device while entering an educational application for learning. For example, a student may interact remotely with a teacher while learning content in an educational application. The image can be called that the display device has the function of chatting while learning.

In another example, a user may play a card game while conducting a video chat with a player entering the game via a display device. For example, a player may enable remote interaction with other players when entering a gaming application to participate in a game. Figurative, the display device can be said to have a "see while play" function.

In some embodiments, in the display device, a game scene is fused with a video picture, a portrait in the video picture is scratched and displayed in the game picture, and the experience of a user is improved.

In some embodiments, in a motion sensing game (such as a ball playing game, a boxing game, a running game, a dancing game and the like), the posture and the motion of a human body, the detection and the tracking of limbs and the detection of key point data of human skeleton are acquired through a camera, and then the detection and the fusion with a game picture are carried out, so that the game of scenes such as sports, dancing and the like is realized.

In another example, a user may interact with at least one other user via a display device in video and voice while the karaoke application. Vividly, the display device can be called as having the function of 'seeing and singing while watching'.

In some embodiments, in an application scenario of "sing while watching", a user can complete recording of a song with other users through a display device while chatting the scenario.

In another example, a user may turn on a camera locally for pictures and videos via a display device. Figuratively, the display device may be said to have a "mirror" function.

In other examples, the display device may add more or reduce the above functions. The function of the display device is not particularly limited in the present application.

Fig. 2a schematically illustrates a hardware structure of a hardware system in the display device 200 according to an exemplary embodiment. For convenience of illustration, the display device 200 in fig. 2a is illustrated as a liquid crystal display.

As shown in fig. 2a, the display device 200 may include: a first panel 11, a first backlight assembly 12, a first rear case 13, a first controller 14, a second controller 15, a first display driving circuit 16, a second panel 21, a second backlight assembly 22, a second rear case 23, a second display driving circuit 24, and a power supply assembly 30. Additionally, in some embodiments, the display device 200 may further include: a base or a suspension bracket. For convenience of illustration, the display device 200 in fig. 2a is illustrated by including a base 41, and the base 41 is used for supporting the display device 200. It should be noted that the drawings only show one type of base design, and those skilled in the art can design different types of bases according to the product requirements.

The first panel 11 is used for presenting the picture of the first display screen 201 to the user. In some embodiments, the first panel 11 may be a liquid crystal panel. For example, the liquid crystal panel may include, in order from top to bottom: a horizontal polarizing plate, a color filter, a liquid crystal layer, a thin film transistor TFT, a vertical polarizing plate, a light guide plate, and a Printed Circuit Board (PCB), and a driving circuit such as a gate driving circuit and a source driving circuit is disposed on the PCB 17. The grid electrode driving circuit is connected with the grid electrode of the thin film transistor TFT through a scanning line, and the source electrode driving circuit is connected with the drain electrode of the thin film transistor TFT through a data line.

The first backlight assembly 12 is disposed below the first panel 11, and is generally an optical assembly for providing sufficient light source with uniform brightness and distribution, so that the first panel 11 can normally display images. The first backlight assembly 12 further includes a first back plate (not shown).

The first rear case 13 is disposed on the first panel 11 to cover the first backlight assembly 12, the first controller 14, the second controller 15, the first display driving circuit 16, the power supply assembly 30, and other components of the display device 200, thereby providing an aesthetic effect.

Wherein the first controller 14, the second controller 15, the first display driving circuit 16 and the power supply assembly 30 are disposed on the first back plate, and some convex hull structures are typically formed by stamping on the first back plate. The first controller 14, the second controller 15, the first display driver circuit 16, and the power supply module 30 are fixed to the bosses by screws or hooks.

The first controller 14, the second controller 15, the first display driving circuit 16 and the power supply module 30 may be disposed on a single board, or may be disposed on different boards, for example, the first controller 14 is disposed on a main board, the second controller 15 is disposed on an interactive board, the first display driving circuit 16 is disposed on the first display driving board, and the power supply module 30 is disposed on the power supply board, or may be disposed on different boards in combination, or may be disposed on a single board together with the first backlight module 12, and the configuration may be specifically set according to actual requirements, which is not limited in this application.

For convenience of illustration, fig. 2a illustrates the first controller 14, the second controller 15, the first display driver circuit 16, and the power supply module 30 on a single board.

The first display driving circuit 16 mainly functions to: the multi-level backlight partition control is performed through the backlight driving signals transmitted by the first controller 14, such as the PWM signal and the localdiming signal, and the control is changed according to the image content, and after the handshake is established between the first controller 14 and the control, the VbyOne display signal transmitted by the first controller 14 is received, and the VbyOne display signal is converted into the LVDS signal, so that the image display of the first display screen 201 is realized.

Wherein the second panel 21 is used for presenting the picture of the second display screen 202 to the user. In some embodiments, the second panel 21 may be a liquid crystal panel, and the specific structure included in the second panel may be as described in the foregoing, which is not described herein again.

The second backlight assembly 22 is disposed below the second panel 12, and is generally an optical assembly for providing sufficient light with uniform brightness and distribution to enable the second panel 12 to normally display images. The second backlight assembly 22 further includes a second back plate (not shown).

The second rear case 23 is disposed on the second panel 21 to jointly hide the components of the display device 200, such as the second backlight assembly 22 and the second display driving circuit 24, thereby achieving an aesthetic effect.

The second display driving circuit 24 is disposed on the second back plate, and some convex hull structures are usually formed on the second back plate by stamping. The second display driving circuit 24 is fixed to the convex bag by a screw or a hook. The second display driving circuit 24 may be separately disposed on a board, such as the second display driving board, or may be disposed on a board together with the second backlight assembly 22, and the second display driving circuit may be disposed specifically according to actual requirements, which is not limited in this application. For convenience of explanation, fig. 2a illustrates the second display driving circuit 24 separately provided on one board.

In some embodiments, fig. 2a further includes a key sheet, where the key sheet may be disposed on the first back plate or the second back plate, which is not limited in this application. And a plurality of keys and key circuits are arranged on the key board, so that the first controller 14 or the second controller 15 can receive key signals from the key board, and the first controller 14 or the second controller 15 can send control signals to the key board.

In addition, the display device 200 further includes a sound reproducing means (not shown in the figure), such as an audio component, e.g., an I2S interface including a power Amplifier (AMP) and a Speaker (Speaker), etc., for realizing reproduction of sound. Usually, the sound components are capable of realizing sound output of at least two sound channels; when the panoramic surround effect is to be achieved, a plurality of acoustic components are required to be arranged to output sounds of a plurality of sound channels, and a detailed description thereof is omitted.

It should be noted that the display device 200 may also be an OLED display, and correspondingly, the template included in the display device 200 is changed accordingly, for example, since the OLED display can achieve self-luminescence, a backlight assembly (the first backlight assembly 12 and the second backlight assembly 22 in fig. 2 a) is not needed in the OLED display, and will not be described herein too much.

Alternatively, a display device with dual display screens is taken as an exemplary illustration as shown in fig. 2a, and a hardware configuration diagram of a hardware system in the display device according to an exemplary embodiment is exemplarily shown in fig. 2 b.

Among them, in the display device having a single display screen as shown in fig. 2b, the display device includes: a panel 1, a backlight assembly 2, a rear case 3, a controller 4, a power supply assembly 5, and a chassis 6. Wherein, the panel 1 is used for presenting pictures for users; the backlight assembly 2 is located below the panel 1, and is generally optical assemblies for providing sufficient brightness and uniformly distributed light sources to enable the panel 1 to normally display image contents, the backlight assembly 2 further includes a back plate 20, the controller 4 and the power supply assembly 5 are disposed on the back plate 20, and are generally stamped on the back plate 20 to form convex hull structures, and the controller 4 and the power supply assembly 5 are fixed on the convex hulls through screws or hooks; the rear shell 3 is covered on the panel 1 to jointly hide the parts of the display equipment such as the backlight component 2, the controller 4, the power supply component 5 and the like, thereby achieving the effect of attractive appearance; and a base 6 for supporting the display device.

The controller 4 and the power supply module 5 may be disposed on a single board, or may be disposed on a single board together with the backlight module, and may be specifically disposed according to actual requirements, which is not limited in this application. For ease of illustration, in fig. 2b, the controller 4 and the power supply assembly 5 are provided together on one board.

Fig. 3 shows a schematic diagram of the connection relationship between the power supply module and the load IN fig. 2a, and as shown IN fig. 3, the power supply module 30 includes an input terminal IN and an output terminal OUT (a first output terminal OUT1, a second output terminal OUT2, a third output terminal OUT3, a fourth output terminal OUT4 and a fifth output terminal OUT5 are shown), wherein the input terminal IN is connected to an AC power source AC (such as mains power), the output terminal OUT is connected to the load, for example, a first output terminal OUT1 is connected to the sound reproducing apparatus, the second output terminal OUT2 is connected to the first panel 11/the second panel 21, the third output terminal OUT3 is connected to the first backlight module 12/the second backlight module 22, the fourth output terminal OUT4 is connected to the first controller 14/the second controller 15, and the fifth output terminal OUT5 is connected to the first display driving circuit 16/the second display driving circuit 24. The power supply 30 needs to convert the ac power into dc power required by the load, and the dc power is usually of different specifications, for example, 18V is required for the audio components, 12V/18V is required for the first controller 14, etc.

The power supply control device can adopt a single power supply control structure, a double power supply control structure or a multi-power supply control structure. For convenience of explanation, a dual power control structure is taken as an example to be exemplified on the basis of the embodiment shown in fig. 2a and fig. 4.

Fig. 4 shows a detailed description of one power architecture in the present application. Referring to fig. 2a and 4, the power supply assembly 30 may be mainly composed of a first power supply circuit 31 and a second power supply circuit 32 connected in parallel. The first power circuit 31 and the second power circuit 32 have substantially the same structure, and the operation principle will be described in detail below mainly by taking the first power circuit 31 as an example.

The first power circuit 31 may include a first rectifying and filtering module, a first PFC module and a first LLC module, which are connected in sequence.

The first rectifying and filtering module may specifically include: the rectifier bridge is used for rectifying input alternating current and inputting full-wave signals to a Power Factor Correction (PFC) module. Before the AC power is input into the first PFC module, an Electromagnetic Interference (EMI) filter may be connected to perform high frequency filtering on the input AC power.

The first PFC module generally includes a PFC inductor, a switching power device, and a PFC control chip, and mainly performs power factor correction on an input Alternating Current (AC) power source to output a stable dc bus voltage (e.g., 380V) to the first resonant converter (LLC) module. The first PFC module can effectively improve the power factor of a power supply and ensure the same phase of voltage and current.

The first LLC module may adopt a double-MOS transistor LLC resonant conversion circuit, and may further include a Pulse Frequency Modulation (PFM) circuit, a capacitor, an inductor, and other components. The first LLC module may specifically step down or step up the dc bus voltage input by the first PFC module, and output a constant voltage to the load. Here, the load may include a load as shown in fig. 3. Typically, the first LLC module is capable of outputting a variety of different voltages to meet the demands of the load. For example, the first LLC module supplies power to the first controller 14, the first LLC module supplies power to the first backlight assembly 12, and so on. For another example, the first controller 14 may further control the first LLC module to supply power (e.g., a supply voltage with a magnitude of 12V or 18V) to the second controller 15, the first display driving circuit 16, the second display driving circuit 24, the keypad, and the second backlight assembly 22, so as to ensure that each board can operate.

In some embodiments, the first power circuit 31 may further include a first synchronous rectification module (not shown), which may include a transformer, a controller, two MOS transistors, and a diode, and is directly capable of outputting a stable target voltage, such as 12V or 18V. It should be noted that the first synchronous rectification module may be separately disposed, or may be disposed in the first LLC module.

The first power supply circuit 31 may further include a relay for controlling the supply of power to the second power supply circuit 32.

The second power circuit 32 may include a second rectifying and filtering module, a second PFC module, and a second LLC module, which are connected in sequence. The alternating current of the second power circuit 32 is derived from the first power circuit 31 or the commercial power, and the second LLC module can realize the power supply of the first backlight assembly 12. The rest of the respective blocks will be described with reference to the description of the first power supply circuit 31.

In some embodiments, the second power circuit 32 further comprises a second synchronous rectification module, wherein the second synchronous rectification module may refer to an implementation form of the first synchronous rectification module.

It should be noted that the arrows in fig. 4 are used to indicate that the power supply assembly 30 directly or indirectly supplies power to other components in the display device 200 except for the power supply assembly. In addition, the first power supply circuit 31 may output a first backlight instruction signal to the first display driving circuit 16 in addition to realizing power supply. The second power supply circuit 32 may output a second backlight indication signal to the first display driving circuit 16 in addition to supplying power to the implementation.

Wherein the first backlight indication signal is used for indicating to turn on the backlight light source of the first area in the first display screen 201 (i.e. the first panel 11). The second backlight indication signal is used to indicate that the backlight light sources of the second area in the first display screen 201 (i.e. the first panel 11) are turned on. The first area and the second area together constitute a part or all of the area displayable by the first display screen 201.

For ease of description, one hardware system in a dual hardware system architecture will be referred to hereinafter as a first hardware system or a first controller, and the other hardware system will be referred to hereinafter as a second hardware system or a second controller. The first controller comprises various processors and various interfaces of the first controller, and various modules connected with the first controller through the various interfaces, and the second controller comprises various processors and various interfaces of the second controller, and various modules connected with the second controller through the various interfaces. The first controller and the second controller may each have a relatively independent operating system installed therein, and the operating system of the first controller and the operating system of the second controller may communicate with each other through a communication protocol, which is as follows: the frame layer of the operating system of the first controller and the frame layer of the operating system of the second controller can communicate for the transmission of commands and data, so that there are two independent but interrelated subsystems in the display device 200.

The dual hardware system architecture of the present application is further described below with reference to fig. 5. It should be noted that fig. 5 is only an exemplary illustration of the dual hardware system architecture of the present application, and does not represent a limitation of the present application. In actual practice, both hardware systems may contain more or less hardware or interfaces as desired.

A block diagram of the hardware architecture of the display device 200 according to fig. 2a is exemplarily shown in fig. 5. As shown in fig. 5, the hardware system of the display apparatus 200 may include a first controller 210 (i.e., the first controller 14 in fig. 2 a) and a second controller 310 (i.e., the second controller 15 in fig. 2 a), and modules connected to the first controller 210 or the second controller 310 through various interfaces.

In some embodiments, the first controller 210 mainly implements a conventional television function (such as an external set-top box, etc.), and may control the first display screen 280 (i.e., the first display screen 201 in fig. 1) to display corresponding image content. The second controller 310 may be configured to receive the instruction sent by the first controller 210 and control the second display screen 380 (i.e., the second display screen 202 in fig. 1) to display corresponding image content.

The modules connected to the first controller 210 may include a tuner demodulator 220, a communicator 230, an external device interface 250, a memory 290, a user input interface 260-3, a video processor 260-1, an audio processor 260-2, a first display screen 280 (i.e., the first display screen 201 in fig. 2 a), an audio output interface 270, and a power supply module 240. In other embodiments, the first controller 210 may include more or fewer modules connected.

The tuning demodulator 220 is configured to perform modulation and demodulation processing such as amplification, mixing, resonance and the like on a broadcast television signal received in a wired or wireless manner, so as to demodulate an audio/video signal carried in a frequency of a television channel selected by a user and additional information (e.g., an EPG data signal) from a plurality of wireless or wired broadcast television signals. Depending on the broadcast system of the television signal, the signal path of the tuner 220 may be various, such as: terrestrial broadcasting, cable broadcasting, satellite broadcasting, internet broadcasting, or the like; according to different modulation types, the adjustment mode of the signal can be a digital modulation mode or an analog modulation mode; and depending on the type of television signal being received, tuner demodulator 220 may demodulate analog and/or digital signals.

The tuner demodulator 220 is also operative to respond to the user-selected television channel frequency and the television signal carried thereby, in accordance with the user selection and as controlled by the first controller 210.

In other exemplary embodiments, the tuner/demodulator 220 may be in an external device, such as an external set-top box. In this way, the set-top box outputs television audio/video signals after modulation and demodulation, and the television audio/video signals are input into the display device 200 through the external device interface 250.

The communicator 230 is a component for communicating with an external device or an external server according to various communication protocol types. For example: the communicator 230 may include a WIFI module 231, a bluetooth communication protocol module 232, a wired ethernet communication protocol module 233, and other network communication protocol modules such as an infrared communication protocol module or a near field communication protocol module (not shown).

The display apparatus 200 may establish a connection of a control signal and a data signal with an external control apparatus or a content providing apparatus through the communicator 230. For example, the communicator may receive a control signal of the remote controller 100 according to the control of the first controller 210.

The external device interface 250 is a component for providing data transmission between the first controller 210 and the second controller 310 or other external devices. The external device interface 250 may be connected with an external apparatus such as a set-top box, a game device, a notebook computer, etc. in a wired/wireless manner, and may receive data such as a video signal (e.g., moving image), an audio signal (e.g., music), additional information (e.g., EPG), etc. of the external apparatus.

The external device interface 250 may include: a High Definition Multimedia Interface (HDMI) terminal is also referred to as HDMI 251, a Composite Video Blanking Sync (CVBS) terminal is also referred to as AV 252, an analog or digital component terminal is also referred to as component 253, a Universal Serial Bus (USB) terminal 254, a Red Green Blue (RGB) terminal (not shown in the figure), and the like. The number and type of external device interfaces are not limited by this application.

The first controller 210 controls the operation of the display apparatus 200 and responds to the operation of the user by running various software control programs (e.g., an operating system and/or various application programs) stored on the memory 290.

As shown in fig. 5, the first controller 210 includes a read only memory RAM 213, a random access memory ROM 214, a graphic processor 216, a CPU processor 212, a communication interface 218, and a communication bus. The RAM 213 and the ROM 214, the graphic processor 216, the CPU processor 212, and the communication interface 218 are connected via a bus.

A ROM 213 for storing instructions for various system boots. If the display device 200 is powered on when a power-on signal is received, the CPU processor 212 executes a system boot instruction in the ROM and copies the operating system stored in the memory 290 to the RAM 214 to start running the boot operating system. After the start of the operating system is completed, the CPU processor 212 copies the various application programs in the memory 290 to the RAM 214, and then starts running and starting the various application programs.

A graphics processor 216 for generating various graphics objects, such as: icons, operation menus, user input instruction display graphics, and the like. The display device comprises an arithmetic unit which carries out operation by receiving various interactive instructions input by a user and displays various objects according to display attributes. And a renderer for generating various objects based on the operator, and displaying the rendered result on the first display screen 280.

A CPU processor 212 for executing operating system and application program instructions stored in memory 290. And executing various application programs, data and contents according to various interactive instructions received from the outside so as to finally display and play various audio and video contents.

In some exemplary embodiments, the CPU processor 212 may include a plurality of processors. The plurality of processors may include a main processor and a plurality of or a sub-processor. A main processor for performing some operations of the display apparatus 200 in a pre-power-up mode and/or operations of displaying a screen in a normal mode. A plurality of or one sub-processor for performing an operation in a standby mode or the like.

The communication interface 218 may include a first interface 218-1 through an nth interface 218-n. These interfaces may be network interfaces that are connected to external devices via a network.

The first controller 210 may control operations of the display device 200 in relation to the first display screen 280. For example: in response to receiving a user command for selecting a UI object displayed on the first display screen 280, the first control screen 210 may perform an operation related to the object selected by the user command.

The first controller 210 may control operations of the display apparatus 200 in relation to the second display screen 380. For example: in response to receiving a user command for selecting a UI object displayed on the second display screen 380, the first control screen 210 may perform an operation related to the object selected by the user command.

Wherein the object may be any one of selectable objects, such as a hyperlink or an icon. Operations related to the selected object, such as: displaying an operation connected to a hyperlink page, document, image, or the like, or performing an operation of a program corresponding to an icon. The user command for selecting the UI object may be a command input through various input means (e.g., a mouse, a keyboard, a touch pad, etc.) connected to the display apparatus 200 or a voice command corresponding to a voice spoken by the user.

The memory 290 includes a memory for storing various software modules for driving and controlling the display apparatus 200. Such as: various software modules stored in memory 290, including: a base module, a detection module, a communication module, a display control module, a browser module, and various service modules, etc. (not shown in the figure).

The basic module is a bottom layer software module for signal communication between hardware in the display device 200 and sending processing and control signals to an upper layer module. The detection module is a management module used for collecting various information from various sensors or user input interfaces, and performing digital-to-analog conversion and analysis management. The voice recognition module comprises a voice analysis module and a voice instruction database module. The display control module is a module for controlling the first display 280 to display image content, and may be used to play information such as multimedia image content and UI interface. The communication module is used for carrying out control and data communication with external equipment. And the browser module is used for executing data communication between the browsing servers. The service module is a module for providing various services and various application programs.

Meanwhile, the memory 290 is also used to store visual effect maps and the like for receiving external data and user data, images of respective items in various user interfaces, and a focus object.

A user input interface 260-3 for transmitting an input signal of a user to the first controller 210 or transmitting a signal output from the first controller 210 to the user. For example, the control device (e.g., a mobile terminal or a remote controller) may transmit an input signal, such as a power switch signal, a channel selection signal, a volume adjustment signal, etc., input by the user to the user input interface, and then the input signal is forwarded to the first controller 210 through the user input interface 260-3; alternatively, the control device may receive an output signal such as audio, video or data processed by the first controller 210 and output from the user input interface 260-3, and display or output the received output signal in audio or vibration form.

In some embodiments, the user may input a user command on a Graphical User Interface (GUI) displayed on the first display screen 280, and the user input interface 260-3 receives the user input command through the Graphical User Interface (GUI). Alternatively, the user may input a user command by inputting a specific sound or gesture, and the user input interface 260-3 receives the user input command by recognizing the sound or gesture through the sensor.

The video processor 260-1 is configured to receive a video signal, and perform video data processing such as decompression, decoding, scaling, noise reduction, frame rate conversion, resolution conversion, and image synthesis according to a standard codec protocol of the input signal, so as to obtain a video signal that is directly displayed or played on the first display screen 280.

Illustratively, the video processor 260-1 includes a demultiplexing module, a video decoding module, an image synthesizing module, a frame rate conversion module, a display formatting module, and the like (not shown in the figure).

The demultiplexing module is used for demultiplexing the input audio and video data stream, and if the input MPEG-2 is input, the demultiplexing module demultiplexes the input audio and video data stream into a video signal and an audio signal.

And the video decoding module is used for processing the video signal after demultiplexing, including decoding, scaling and the like.

And the image synthesis module, such as an image synthesizer, is used for performing superposition mixing processing on the GUI signal input by the user or generated by the user and the video picture after the zooming processing by the graphics generator so as to generate an image signal for display.

The frame rate conversion module is configured to convert a frame rate of an input video, such as a frame rate of an input 24Hz, 25Hz, 30Hz, or 60Hz video into a frame rate of 60Hz, 120Hz, or 240Hz, where the input frame rate may be related to a source video stream, and the output frame rate may be related to a refresh rate of a display device. And a display formatting module for converting the signal output by the frame rate conversion module into a signal conforming to a display format of a display device, such as converting the format of the signal output by the frame rate conversion module to output RGB data signals.

First display screen 280 for receiving image signals from video processor 260-1 for displaying video content and images and menu manipulation interface first display screen 280 includes a display screen assembly for presenting a picture and a driving assembly for driving the display of the image. The video content may be displayed from the video in the broadcast signal received by the tuner/demodulator 220, or from the video content input from the communicator or the external device interface. The first display screen 280 simultaneously displays a user manipulation interface UI generated in the display apparatus 200 and used to control the display apparatus 200.

And a driving assembly for driving the display according to the type of the first display screen 280. Alternatively, a projection device and a projection screen may be included, provided that the first display screen 280 is a projection display screen.

The audio processor 260-2 is configured to receive an audio signal, and perform decompression and decoding according to a standard codec protocol of the input signal, and perform audio data processing such as noise reduction, digital-to-analog conversion, and amplification processing to obtain an audio signal that can be played in the speaker 272.

An audio output interface 270 for receiving the audio signal output by the audio processor 260-2 under the control of the first controller 210, wherein the audio output interface may include a speaker 272 or an external sound output terminal 274 for outputting to a generating device of an external device, such as: external sound terminal or earphone output terminal.

In other exemplary embodiments, video processor 260-1 may comprise one or more chip components. The audio processor 260-2 may also include one or more chips.

And, in some other exemplary embodiments, the video processor 260-1 and the audio processor 260-2 may be separate chips or may be integrated in one or more chips together with the first controller 210.

And a power supply module 240 for providing power supply support for the display device 200 by the power input from the external power source under the control of the first controller 210. The power supply module 240 may include a built-in power supply circuit installed inside the display apparatus 200, or may be a power supply installed outside the display apparatus 200, such as a power supply interface for providing an external power supply in the display apparatus 200.

Similar to the first controller 210, as shown in fig. 5, the module connected to the second controller 310 may include a communicator 330, a detector 340, a memory 390, and a second display screen 380 (i.e., the second display screen 202 in fig. 1). A user input interface, a video processor, an audio output interface (not shown) may also be included in some embodiments. In some embodiments, there may also be a power supply module (not shown) that independently powers the second controller 310.

The communicator 330 is a component for communicating with an external device or an external server according to various communication protocol types. For example: the communicator 330 may include a WIFI module 331, a bluetooth communication protocol module 332, a wired ethernet communication protocol module 333, and other network communication protocol modules such as an infrared communication protocol module or a near field communication protocol module (not shown).

The communicator 330 of the second controller 310 and the communicator 230 of the first controller 210 also interact with each other. For example, the WiFi module 231 within the hardware system of the first controller 210 is used to connect to an external network, generate network communication with an external server, and the like. The WiFi module 331 in the hardware system of the second controller 310 is used to connect to the WiFi module 231 of the first controller 210 without generating a direct connection with an external network or the like, and the second controller 310 is connected to the external network through the first controller 210. Therefore, for the user, a display device as in the above embodiment displays a WiFi account to the outside.

The detector 340 is a component of the second controller 310 for collecting signals of an external environment or interaction with the outside. The detector 340 may include a light receiver 342, a sensor for collecting the intensity of ambient light, which may be used to adapt to display parameter changes, etc.; the system may further include an image collector 341, such as a camera, a video camera, etc., which may be configured to collect external environment scenes, collect attributes of the user or interact gestures with the user, adaptively change display parameters, and identify user gestures, so as to implement a function of interaction with the user.

An external device interface 350, which provides a component for data transmission between the second controller 310 and the first controller 210 or other external devices. The external device interface may be connected with an external apparatus such as a set-top box, a game device, a notebook computer, etc. in a wired/wireless manner.

A video processor 360 for processing the associated video signal.

The second controller 310 controls the operation of the display device 200 and responds to the operation of the user by running various software control programs stored on the memory 390 (e.g., using installed third party applications, etc.), and interacting with the first controller 210.

As shown in fig. 5, the second controller 310 includes a read only memory ROM 313, a random access memory RAM 314, a graphic processor 316, a CPU processor 312, a communication interface 318, and a communication bus. The ROM 313 and the RAM 314, the graphic processor 316, the CPU processor 312, and the communication interface 318 are connected by a bus.

A ROM 313 for storing instructions for various system boots. CPU processor 312 executes system boot instructions in ROM and copies the operating system stored in memory 390 to RAM 314 to begin running the boot operating system. After the start of the operating system is completed, the CPU processor 312 copies the various application programs in the memory 390 to the RAM 314, and then starts running and starting the various application programs.

A CPU processor 312 for executing the operating system and application program instructions stored in the memory 390, communicating with the first controller 210, transmitting and interacting signals, data, instructions, etc., and executing various application programs, data and contents according to various interactive instructions receiving external input, so as to finally display and play various audio-video contents.

The communication interface 318 is plural and may include a first interface 318-1 to an nth interface 318-n. These interfaces may be network interfaces connected to external devices via a network, or may be network interfaces connected to the first controller 210 via a network.

The second controller 310 may control operations of the display device 200 in relation to the second display screen 380. For example: in response to receiving a user command for selecting a UI object displayed on the second display screen 380, the second controller 310 may perform an operation related to the object selected by the user command.

The second controller 310 may control operations of the display device 200 in relation to the first display screen 280. For example: in response to receiving a user command for selecting a UI object displayed on the first display screen 280, the first controller 210 may perform an operation related to the object selected by the user command.

A graphics processor 316 for generating various graphics objects, such as: icons, operation menus, user input instruction display graphics, and the like. The display device comprises an arithmetic unit which carries out operation by receiving various interactive instructions input by a user and displays various objects according to display attributes. And a renderer for generating various objects based on the operator, and displaying the rendered result on the second display screen 380.

The graphics processor 316 of the second controller 310 and the graphics processor 216 of the first controller 210 are both capable of generating various graphics objects. In distinction, if the application 1 is installed in the second controller 310 and the application 2 is installed in the first controller 210, the graphic object is generated by the graphic processor 316 of the second controller 310 when the user performs the instruction input by the user in the application 1 at the interface of the application 1. When a user is at the interface of the application 2 and an instruction input by the user is made within the application 2, a graphic object is generated by the graphic processor 216 of the first controller 210.

Fig. 6 is a diagram schematically illustrating a functional configuration of a display device according to an exemplary embodiment.

As shown in fig. 6, the memory 390 of the second controller 310 and the memory 290 of the first controller 210 are used to store an operating system, an application program, contents, user data, and the like, respectively, and perform system operations for driving the first display screen 280 and the second display screen 380 and various operations in response to a user under the control of the second controller 310 and the second controller 210. The memory 390 of the second controller 310 and the memory 290 of the first controller 210 may include volatile and/or non-volatile memory.

As for the first controller 210, the memory 290 is specifically used for storing an operating program for driving the first controller 210 in the display device 200, and storing various applications built in the display device 200, various applications downloaded by a user from an external device, various graphical user interfaces related to the applications, various objects related to the graphical user interfaces, user data information, and internal data of various supported applications. The memory 290 is used to store system software such as an Operating System (OS) kernel, middleware, and applications, and to store input video data and audio data, and other user data.

The memory 290 is specifically used for storing drivers and related data such as the video processor 260-1 and the audio processor 260-2, the first display 280, the communicator 230, the tuner demodulator 220, the input/output interface, and the like.

In some embodiments, memory 290 may store software and/or programs, software programs for representing an Operating System (OS) including, for example: a kernel, middleware, an Application Programming Interface (API), and/or an application program. For example, the kernel may control or manage system resources, or functions implemented by other programs (e.g., the middleware, APIs, or applications), and the kernel may provide interfaces to allow the middleware and APIs, or applications, to access the controller to implement controlling or managing system resources.

The memory 290, for example, includes a broadcast receiving module 2901, a channel control module 2902, a volume control module 2903, an image control module 2904, a display control module 2905, a first audio control module 2906, an external instruction recognition module 2907, a communication control module 2908, a light receiving module 2909, a power control module 2910, an operating system 2911, and other applications 2912, a browser module 2913, and so forth. The first controller 210 performs operations such as: the system comprises a broadcast television signal receiving and demodulating function, a television channel selection control function, a volume selection control function, an image control function, a display control function, an audio control function, an external instruction identification function, a communication control function, an optical signal receiving function, an electric power control function, a software control platform supporting various functions, a browser function and other various functions.

The memory 390 includes a memory storing various software modules for driving and controlling the display apparatus 200. Such as: various software modules stored in memory 390, including: a base module, a detection module, a communication module, a display control module, a browser module, and various service modules, etc. (not shown in the figure). Since the functions of the memory 390 and the memory 290 are similar, reference may be made to the memory 290 for relevant points, and thus, detailed description thereof is omitted here.

Illustratively, the memory 390 includes an image control module 3904, a second audio control module 3906, an external instruction recognition module 3907, a communication control module 3908, a light receiving module 3909, an operating system 3911, and other application programs 3912, a browser module 3913, and the like. The first controller 210 performs operations such as: the system comprises an image control function, a display control function, an audio control function, an external instruction identification function, a communication control function, an optical signal receiving function, an electric power control function, a software control platform supporting various functions, a browser function and other various functions.

Differently, the external instruction recognition module 2907 of the first controller 210 and the external instruction recognition module 3907 of the second controller 310 may recognize different instructions.

Illustratively, since the image receiving device such as a camera is connected to the second controller 310, the external instruction recognition module 3907 of the second controller 310 may include the pattern recognition module 2907-1, a pattern database is stored in the pattern recognition module 3907-1, and when the camera receives an external pattern instruction, the camera corresponds to the instruction in the pattern database to perform instruction control on the display device. Since the voice receiving device and the remote controller are connected to the first controller 210, the external command recognition module 2907 of the first controller 210 may include a voice recognition module 2907-2, a voice database is stored in the voice recognition module 2907-2, and when the voice receiving device receives an external voice command or the like, the voice receiving device and the like perform a corresponding relationship with a command in the voice database to perform command control on the display device. Similarly, the control device 100 such as a remote controller is connected to the first controller 210, and the button command recognition module 2907-3 performs command interaction with the control device 100.

Based on the foregoing description, in conjunction with fig. 1-6, the display device 200 has two display screens (i.e., a first display screen 201 and a second display screen 202). Generally, based on the primary and secondary display contents, the display device 200 displays a picture of a conventional television program on the first display screen 201 and displays a picture of auxiliary information such as a notification-type message, a voice assistant, a reminder-type message, etc. on the second display screen 202, so that the first display screen 201 and the second display screen 202 display pictures at the same time without interfering with each other.

In order to make the display apparatus 200 have high picture quality and brightness index, the display apparatus 200 needs to provide a large power to the backlight assembly. Therefore, the display apparatus 200 employs a dual power supply architecture in which the power supply board 4 is constituted by the main power supply board 41 and the sub power supply board 42. In order to equalize the power of the two power supply boards, the primary power supply board 41 generally supplies power to one half of the backlight sources in the backlight assembly, and the secondary power supply board 42 supplies power to the other half of the backlight sources in the backlight assembly.

As will be understood by those skilled in the art, the display of the liquid crystal display device is a passive light type, the liquid crystal panel itself does not emit light, and it needs to use a backlight light source such as a backlight tube to realize the light emission of the liquid crystal panel, i.e. the light emitted by the backlight light source is transmitted through the liquid crystal panel, and the molecules of the liquid crystal are used to control the passing light (i.e. adjust the light) under the action of the electric field to form the image content. Therefore, a liquid crystal display panel must be provided with a backlight source to form a complete display panel.

Fig. 7 is a schematic structural diagram of a display device according to an embodiment of the present application. As shown in fig. 7, the display device 700 of the present application may include: a display 701, a backlight assembly 702, a power board 703, a controller 704, and a backlight driving circuit 705.

Hereinafter, a detailed description will be given of a specific structure of the display device and a specific implementation procedure of the backlight light source control method by using specific embodiments.

In some embodiments, the display device 700 may include therein: a backlight driving circuit 705 for controlling whether the backlight light source in the first backlight assembly 12 is turned on and adjusting the brightness of the backlight light source;

in some embodiments, the display device 700 further includes a TCON circuit (not shown) for preparing the first display screen 280/second display screen 380 for the desired displayed image content.

Under the dual power architecture, the display device 200 typically employs thousands of levels of backlight partitioning control based on image content. In some embodiments, the present application divides the display area of the first display screen 280 into a first area and a second area. And the present application does not limit the division of the display area.

For example, the first area is located at the upper half of the displayable area of the first display screen 280, and the second area is located at the lower half of the displayable area of the first display screen 280. Alternatively, the first area is located in the left half of the displayable area of the first display screen 280, and the second area is located in the right half of the displayable area of the first display screen 201.

The first power circuit 7031 may not only provide the backlight driving circuit 705 with the power of the backlight source of the backlight assembly 702, but also transmit a first backlight indicating signal to the backlight driving circuit 705, when supplying power to the backlight driving circuit 705, where the first backlight indicating signal is used to indicate the backlight driving circuit 705 to turn on the backlight source of the first region.

Also, the first controller 704 may transmit a backlight driving signal to the backlight driving circuit 705, so that the backlight driving circuit 705 may control a backlight effect such as overall brightness and local brightness of the backlight light source in the backlight assembly 705 based on the backlight driving signal.

For example, the backlight driving signal may include a PWM signal for controlling the overall brightness of the backlight light sources in the backlight assembly 702 and a localdiming signal for controlling the local brightness of the backlight light sources in the backlight assembly 702 based on the content of the image displayed by the display screen. The PWM signal may be sent from the controller 704 to the backlight driving circuit 705 indirectly through the first power circuit 7031, or may be sent from the controller 704 to the backlight driving circuit 705 directly. To ensure that the Localdim signal is not disturbed by other signals, the Localdim signal is typically sent directly by the controller 704 to the backlight driving circuit 705.

The second power circuit 7032 may transmit a second backlight indication signal to the backlight driving circuit 705 while supplying power to the TCON circuit, where the second backlight indication signal is used to indicate the first backlight driving circuit 161 to turn on the backlight source in the second region, and the first region and the second region together form a part or all of the displayable region of the first display 280.

The powered TCON circuit may handshake with the controller 704. After the handshake, the TCON circuit may receive the VbyOne display signal from the controller 704, and may convert the VbyOne display signal into an LVDS signal, so as to display the image of the first display screen 280.

In addition, the second power circuit 7032 may also provide power to the backlight driving circuit 705 for the backlight light source in the backlight assembly 702.

IN some embodiments, the first input terminal IN 1 of the backlight driving circuit 705 is connected to the first power circuit 7031, the second input terminal IN 2 of the backlight driving circuit 705 is connected to the controller 704, the third input terminal IN 3 of the backlight driving circuit 705 is connected to the second power circuit 7032, and the output terminal OUT of the backlight driving circuit 705 is connected to the backlight assembly 702. For convenience of explanation, in fig. 7, power supply lines are drawn in thick lines, and signal connections are drawn in thin lines.

In this application, the display device 700 may be the display device 200 in fig. 1, such as a liquid crystal display, or may be other forms of display devices, which is not limited in this application. The display device 700 may include one display screen or a plurality of display screens, which is not limited in this application. For example, when there are two display screens in the display device 700, the two display screens may be the first display screen 201 and the second display screen 202 in fig. 1.

The display screen 701 may be any display screen used for displaying image content in the display device 700, and the implementation form of the display screen 701 is not limited in this application. For example, the display 701 may be the first display 280 in fig. 5, and may be disposed on the aforementioned first display 201. The display 701 may also be the second display 380 of fig. 5, and may be disposed on the second display 202 mentioned above.

The backlight assembly 702 is the aforementioned first backlight assembly 12 or the second backlight assembly 22, and the present application is not limited to the specific implementation form of the backlight assembly 702. And the backlight assembly 702 is used to provide a backlight light source to the display 701 so that the display 701 can display image content.

The power supply component 703 is used to supply power to the display device 700, and the power supply component 703 may include a first power circuit 7031 and a second power circuit 7032. The first power circuit 7031 and the second power circuit 7032 may be disposed on one board or may be disposed on different boards, which is not limited in this application.

The first power circuit 7031 has a function similar to that of the first power circuit 31 mentioned above, and the first power circuit 7031 may be disposed on the power module 30 shown in fig. 2a, and is configured to supply power to the controller 704, the second power circuit 7032, the backlight driving circuit 705 and the backlight module 702, and transmit a first signal (illustrated by signal 1 in fig. 7) to the backlight driving circuit 705.

The first power circuit 7031 supplies power to the backlight module 702 by supplying power required by the backlight module 702 to the backlight driving circuit 705 through the first power circuit 7031 (not shown in fig. 7). And the present application does not limit the specific implementation form of the first power circuit 7031. In addition, the first power supply circuit 7031 can also supply power to a sound reproducing device (not illustrated in fig. 7) such as an audio component in the display apparatus 700.

The second power circuit 7032 has a function similar to that of the second power circuit 32 mentioned above, and the second power circuit 7032 may be disposed on the power module 30 shown in fig. 2a, and is used to supply power to the TCON circuit 704 and the backlight module 702, and transmit a second signal (illustrated by signal 2 in fig. 7) to the backlight driving circuit 705.

The second power circuit 7032 supplies power to the backlight module 702 by supplying power required by the backlight module 702 to the backlight driving circuit 705 through the second power circuit 7032 (not shown in fig. 7). And the specific implementation form of the second power circuit 7032 is not limited in this application. In addition, the second power supply circuit 7032 may also supply power to a sound reproducing device (not illustrated in fig. 7) such as an audio component in the display apparatus 700.

The controller 704 may be the aforementioned first controller 210, or may be another System On Chip (SOC), and the specific implementation form of the controller 706 is not limited in this application. The controller 704 may transmit a third signal (illustrated by signal 3 in fig. 7) to the backlight driving circuit 705, and the specific function of the third signal may be as described in detail in the foregoing description of the backlight driving signal, which is not described herein again.

The backlight driving circuit 705 may be the aforementioned first backlight driving circuit 161 in the first display driving circuit 16, and the present application does not limit the specific implementation form of the backlight driving circuit 705. The backlight driving circuit 705 may supply power to the backlight assembly 702 to turn on the backlight light source according to the first signal and the second signal, and may adjust the brightness of the backlight light source in the backlight assembly 702 according to the third signal.

Note that the backlight driving circuit 705 and the backlight assembly 702 are provided correspondingly. When the backlight assembly 702 is used to provide backlight to the first panel 11 in fig. 2a, the backlight driving circuit 705 is used to provide power to the backlight light source in the first backlight assembly 11 in fig. 2a and to control the brightness of the backlight light source in the first backlight assembly 11. When the backlight assembly 702 is used to provide backlight to the second panel 12 in fig. 2a, the backlight driving circuit 705 is used to provide power to the backlight source in the second backlight assembly 22 in fig. 2a and to control the brightness of the backlight source in the second backlight assembly 22.

On the basis of the embodiment shown in fig. 7, the backlight driving circuit 705 in the present application has a function of controlling the backlight assembly 702 to turn on the backlight light source. Next, with reference to fig. 8, a detailed description will be given of a specific implementation process of the backlight driving circuit 705 for turning on the backlight light source by controlling the backlight assembly 702.

Fig. 8 is a schematic signaling interaction diagram of a backlight source control method according to an embodiment of the present application. As shown in fig. 8, the backlight light source control method of the present application may include:

s101, after receiving the power-on command, the controller 704 controls the first power circuit 7031 to send a first signal to the backlight driving circuit 705, where the first signal is used to instruct the backlight driving circuit 705 to supply power to a backlight source located in a first area in the backlight assembly 702.

After the controller 704 receives the power-on command, the controller 704 determines that the display device 700 needs to be turned on at this time. The power-on command is used to instruct the display device 700 to start, such as a remote control command or a key command. The starting-up instruction can be a digital signal or an analog signal, and the specific implementation form of the starting-up instruction is not limited in the application.

After the display device 700 is turned on, the controller 704 may control the first power circuit 7031 to send a first signal, which may be a backlight voltage, to the backlight driving circuit 705, where the first signal is used to instruct the backlight driving circuit 705 to provide power to the backlight source located in the first area in the backlight assembly 702, so as to turn on the backlight source in the first area. The specific form of the first signal is not limited in this application.

S102, the controller 704 sends a third signal to the backlight driving circuit 705, where the third signal is used to control the brightness of the backlight source in the backlight assembly 702.

The first power circuit 7031 may also supply power to the controller 704 after the display device 700 is turned on, so that the controller 704 performs its own operation. The powered controller 704 may output a third signal to the backlight driving circuit 705, where the third signal is used to control the brightness of the backlight light source in the backlight assembly 702.

The specific form of the third signal is not limited in this application. For example, the third signal may include a PWM signal for controlling the overall brightness of the backlight light source in the backlight assembly 702 and a localdiming signal for controlling the local brightness of the backlight light source in the first backlight assembly 21 based on the content of the image displayed by the display screen. The PWM signal may be sent from the controller 704 to the backlight driving circuit 705 indirectly through the main power board 701, or may be sent from the controller 704 to the backlight driving circuit 705 directly. To ensure that the Localdim signal is not disturbed by other signals, the Localdim signal is typically sent directly by the controller 704 to the backlight driving circuit 705.

S103, the controller 704 controls the second power circuit 7032 to send a second signal to the backlight driving circuit 705, where the second signal is used to instruct the backlight driving circuit 705 to supply power to the backlight source located in the second area of the backlight assembly 702, and the first area and the second area form a display area of the display screen 701.

After the display device 700 is turned on, the first power circuit 7031 may also supply power to the second power circuit 7032, so that the second power circuit 7032 performs its own operation. Thus, the controller 704 may control the powered second power circuit 7032 to send a second signal, which may be a backlight voltage, to the backlight driving circuit 705, where the second signal is used to instruct the backlight driving circuit 705 to provide power to the backlight source located in the second area of the backlight assembly 702 to turn on the backlight source in the second area, and the first area and the second area form a display area of the display screen 701. The present application does not limit the specific form of the second signal.

It should be noted that there is no chronological sequence between S101 and S102, and S101 and S102 may be executed simultaneously or sequentially. Generally, S103 is executed later than S101 and S102.

S104 and the backlight driving circuit 705, after a preset time period, control the backlight source in the backlight assembly 702 to turn on based on the first signal, the third signal and the second signal.

Since the controller 704 can control the first power circuit 7031 to supply power to the controller 704 after the display device 700 is turned on, the controller 704 can not only notify the first power circuit 7031 to transmit the first signal to the backlight driving circuit 705, but also transmit the third signal to the backlight driving circuit 705 after the power supply, and therefore, the time when the backlight driving circuit 705 receives the first signal and the time when the backlight driving circuit 705 receives the third signal have almost the same difference. The controller 704 can also control the first power circuit 7031 to supply power to the second power circuit 7032, and the second power circuit 7032 transmits the second signal to the backlight driving circuit 705 after supplying power, so that the time when the backlight driving circuit 705 receives the first signal differs from the time when the backlight driving circuit 705 receives the second signal by a certain time.

If the backlight driving circuit 705 provides power to the backlight source in the backlight assembly 702 as soon as receiving the backlight indication signal (such as the first signal or the second signal) according to the control method in the prior art, the backlight driving circuit 705 turns on the backlight source in the first region first and then turns on the backlight source in the second region later, or turns on the backlight source in the second region first and then turns on the backlight source in the first region later, so that the backlight sources in the display region of the display panel 701 cannot be turned on simultaneously.

Based on the above, to avoid the above problem, in the present application, the backlight driving circuit 705 may delay a preset time period to ensure that the backlight driving circuit 705 can receive the first signal, the third signal and the second signal, and then control the backlight source in the backlight assembly 702 to be turned on based on the first signal, the third signal and the second signal. By doing so, the phenomenon that the backlight light sources in the display area of the display screen 701 are turned on in different areas is avoided, that is, it is ensured that the power supply time sequences for turning on the backlight light sources are the same, so that the first backlight driving circuit 161 supplies power to the backlight light sources in the first area and the second area on the first backlight assembly at the same time, it is ensured that the backlight brightness of the display area of the display screen 701 has integrity, it is avoided that part of the area of the display device is bright and the rest of the area is dark, the viewing experience of a user is improved, the picture quality of the display device 700 is ensured, and the brightness index of the display device 700 meets the display requirement.

The application provides a display device and a backlight source control method, which can add a time delay design in a backlight driving circuit, so that the backlight driving circuit can simultaneously open the backlight source of the whole display area of a display screen, the backlight brightness control of the display screen has integrity, the viewing experience of a user is improved, the picture quality of the display device is ensured, and the brightness index of the display device meets the display requirement.

The specific size of the preset duration is not limited, and the backlight driving circuit 705 receives the first signal, the third signal and the second signal after the preset duration. For example, the preset time period may be 1 second or 200 milliseconds, etc.

In some embodiments, the starting time of the preset time period is the time when the backlight driving circuit 705 receives the first signal or the third signal, and the ending time of the preset time period is greater than or equal to the time when the backlight driving circuit 705 receives the second signal.

Alternatively, in some embodiments, the starting time of the preset time period is the time when the backlight driving circuit 705 receives the second signal, and the preset time period is greater than or equal to 0.

Fig. 9 shows a timing diagram of signals of the backlight driving circuit 705 respectively receiving the first signal, the third signal and the second signal and controlling the backlight source in the backlight assembly 702 based on the three signals. For convenience of illustration, in fig. 9, the abscissa is time, the ordinate is a signal, and when the signal is at a low level, the backlight driving circuit 705 does not receive the signal; when the signal is at a high level, the backlight driving circuit 705 receives the signal. Signal 1 represents a first signal, signal 2 represents a second signal, and signal 3 represents a third signal.

As shown in fig. 9, the backlight driving circuit 705 receives the first signal and the third signal at time T1, respectively. The backlight driving circuit 705 receives the second signal at time T2. The backlight driving circuit 705 controls the backlight light source in the backlight assembly 702 to be turned on based on the first signal, the third signal and the second signal at time T3.

The backlight driving circuit 705 may set the difference between the time T3 and the time T1 as a preset time period, or may set the difference between the time T3 and the time T2 as a preset time period.

According to the display device and the backlight light source control method, after a starting-up instruction is received, the controller controls the first power supply circuit to send a first signal to the backlight drive circuit, and the first signal is used for indicating the backlight drive circuit to supply power to the backlight light source located in the first area in the backlight assembly. The controller sends a third signal to the backlight driving circuit after being powered, and the third signal is used for adjusting the brightness of the backlight light source in the backlight assembly. The controller controls the second power circuit to send a second signal to the backlight driving circuit, the second signal is used for indicating the backlight driving circuit to supply power to a backlight light source in a second area in the backlight assembly, and the first area and the second area form a display area of the display screen. And after the preset time length, the backlight driving circuit controls the backlight light source in the backlight assembly to be turned on based on the first signal, the third signal and the second signal. In the application, based on dual power supply architecture, carry out the time delay of being shaded through backlight drive circuit, be favorable to backlight drive circuit when receiving the signal that is used for instructing the partial backlight source power supply that lies in the display area in the backlight assembly, be used for instructing the signal that lies in the remaining backlight source power supply of display area in the group subassembly of being shaded and be used for adjusting the signal that lies in the luminance of the backlight source of display area, can open the whole backlight source of display area of display screen simultaneously, make the backlight brightness control of display screen possess the wholeness, user's viewing experience has been improved, display device's picture quality has been ensured, make display device's luminance index satisfy the demonstration demand.

On the basis of the above-described embodiments shown in fig. 7 to 9, after the display device 700 is powered on, the first power circuit 7031 after being powered on may supply power to the controller 704. The controller 704 enters a standby state when it has a power input and transmits a first state of a (STB) standby signal to the first power circuit 7031, so that the first power circuit 7031 enters the standby state. At this time, the second power supply circuit 7032 has no power supply output because the first power supply circuit 7031 enters the standby state, and the first power supply circuit 7031 maintains only the power supply output of the controller 704.

When the controller 704 receives the power-on command, the controller 704 determines that there is a need to turn on the display device 700. At this time, the controller 704 transmits a second state of a standby (abbreviated as STB) signal to the first power circuit 7031, so that the first power circuit 7031 supplies power to the controller 704 and the backlight driving circuit 705, respectively, and the first power circuit 7031 supplies power to the backlight driving circuit 705 for the backlight light source in the backlight assembly 702.

After the controller 704 is powered back, the display apparatus 700 is fully powered up and enters an initialization configuration. The controller 704 configures a level state of a first interface for connecting the controller 704 and the first power circuit 7031 to a first state, such as high or low. At this time, the controller 704 may send the first state of the control (SW) signal to the first power circuit 7031 through the first interface, so that the first power circuit 7031 may output the first signal to the backlight driving circuit 705 based on the first state of the control signal, so as to instruct the backlight driving circuit 705 to provide power to the backlight light source located in the first region of the backlight assembly 702. Wherein the first state of the control signal corresponds to a level state of the first interface.

Also, the first power supply circuit 7031 can also supply power to the second power supply circuit 7032 based on the first state of the control signal. Meanwhile, the first power circuit 7031 may also send the first state of the control signal to the second power circuit, so that the powered second power circuit 7032 may output a second signal to the backlight driving circuit 705 to instruct the backlight driving circuit 705 to provide power to the backlight light source in the second region of the backlight assembly 702. In addition, the second power circuit 7032 may not only supply power to the TCON board in the display device 700 and the power amplifier in the audio module, but also supply power to the backlight source in the backlight module 702 to the backlight driving circuit 705.

Since the first signal for turning on the backlight source of the first region and the second signal for turning on the backlight source of the second region are not synchronously transmitted to the backlight driving circuit 705, the backlight driving circuit 705 may control the backlight source of the backlight assembly to be turned on based on the first signal, the third signal and the second signal after a preset time period, so as to display the image content on the display region of the display screen 701.

It should be noted that, when the display device 700 is turned on, the display device 700 displays the power-on LOGO first, and the display areas of the display device 700 except for the display area displaying the power-on LOGO are all black screens, and the black screens are controlled by the backlight driving circuit 705 through a calibration signal.

In this application, the controller 704 configures the level state of the interface connected to the first power circuit 7031, so as to control the power supply and communication of the first power circuit 7031 and the power supply and communication of the second power circuit 7032, thereby simplifying the control sequence of the display device 700, omitting the control circuit of one interface, saving the number of interfaces, and realizing the power distribution and backlight brightness control of the backlight driving circuit 705.

It should be noted that, in the present application, the controller 704 may also adopt a plurality of interfaces to respectively implement power supply and communication of the first power circuit 7031 and the second power circuit 7032, and the specific process may be as described above, which is not described herein again.

On the basis of the above-mentioned embodiments shown in fig. 7 to 9, when the display device 700 needs to be in standby, the controller 704 may receive a standby instruction, such as a remote control instruction or a key instruction, by using a software code or a hardware circuit, and the like, wherein the standby instruction is used for instructing the display device 700 to be in standby. The standby instruction can be a digital signal or an analog signal, and the specific implementation form of the startup instruction is not limited in the application.

After the controller 704 receives the standby instruction, the controller 704 determines that the display apparatus 700 needs to be standby at this time. At this time, the controller 704 configures the level state of the first interface to a second state, such as high or low, and the first state is different from the second state. Accordingly, the controller 704 may send the second state of the control (SW) signal to the first power circuit 7031 through the first interface, so that the first power circuit 7031 may stop providing the backlight driving circuit 705 with the backlight source of the backlight assembly turned off based on the second state of the control signal. Wherein the second state of the control signal corresponds to a level state of the first interface.

The first power circuit 7031 may also stop supplying power to the backlight driving circuit 705 after the backlight light source is turned off, so that the backlight driving circuit 705 is powered down. In addition, the first power supply circuit 7031 may stop supplying power to the second power supply circuit 7032, and the modules in the display device 700 have been turned off, so that the modules are in a standby state.

Based on the above, when the display device 700 has two display screens, i.e., the display screen 701 and the other display screen, respectively, the backlight driving circuit 705 may correspond to not only the display screen 701 to turn on the backlight source of the display screen 701 but also the other display screen to turn on the backlight source of the other display screen, or may correspond to the display screen 701 and the other display screen to turn on the backlight source of the display screen 701 and the other display screen.

Since the backlight sources of the display screen 701 and the other display screen do not need to be turned on simultaneously when the display device 700 is turned on. Therefore, for convenience of explanation, the backlight driving circuit 705 corresponds to the display panel 701. Then, the display device 700 also turns on the backlight source of the other display screen.

The display device 700 may further include another controller on the basis of the embodiments shown in fig. 7 to 9 described above. The controller 704 may provide power to another controller and another display screen, respectively. When power is input, the other controller can output data corresponding to the startup picture to the other display screen, so that the other display screen can display the startup picture.

In order to realize image content display of another display screen, the display device 700HIA may further include: a first circuit and a TCON circuit. The first circuit is used for receiving various power supply voltages and communication signals transmitted by the controller 704, and also used for receiving signals transmitted by another controller, and converting the format of the signals transmitted by the other controller into a format suitable for the TCON circuit, for example, converting an HDMI signal into an LDVS signal. The TCON circuit is used for converting displayed data for another display screen.

Normally, no Micro Controller Unit (MCU) circuit is present at the periphery of the first circuit, and therefore, the controller 704 is connected to the first circuit using an I2C interface to initialize the first circuit. The first circuit is connected with the TCON circuit through a General-purpose input/output (GPIO), power supply of the TCON circuit is achieved, and converted signals can be transmitted to the TCON circuit when an instruction corresponding to the I2C interface is received.

After the controller 704 receives the power-on command, the controller 704 may respectively provide power to another controller, the first circuit, the TCON circuit, and the backlight assembly corresponding to another display screen, and may further initialize the first circuit. The initialized first circuit may receive a signal transmitted by another controller and transmit the format-converted signal to the powered TCON circuit. And the first circuit may also receive a PWM signal transmitted by the controller 704. Based on the PWM signal, the first circuit may control the backlight source in the backlight assembly corresponding to the other display screen to turn on the backlight source of the other display screen, thereby completing the power-on process of the other display screen.

When the controller 704 receives the standby command, the controller 704 stops supplying power to the backlight assembly corresponding to the other display panel to turn off the backlight light source of the other display panel. After the backlight source is turned off, the controller 704 stops supplying power to the other controller, the first circuit and the TCON circuit, and the standby process of the other display screen is completed.

Illustratively, the application also provides a display device. The specific structure of the display device provided in the present application is shown in fig. 7, and may be used to implement the technical solutions in the above method embodiments, and the implementation principle and the technical effect are similar, and are not described herein again.

In the several embodiments provided in the present application, it should be understood that the disclosed apparatus and method may be implemented in other ways. For example, the above-described embodiments of the apparatus are merely illustrative, and for example, the division of modules is only one logical division, and other divisions may be realized in practice, for example, a plurality of modules may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, devices or modules, and may be in an electrical, mechanical or other form.

Modules described as separate parts may or may not be physically separate, and parts displayed as modules may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of the embodiments of the present application.

In addition, functional modules in the embodiments of the present application may be integrated into one processing unit, or each module may exist alone physically, or two or more modules are integrated into one unit. The unit formed by the modules can be realized in a hardware form, and can also be realized in a form of hardware and a software functional unit.

The integrated module implemented in the form of a software functional module may be stored in a computer-readable storage medium. The software functional module is stored in a storage medium and includes several instructions to enable a computer device (which may be a personal computer, a server, or a network device) or a processor (processor) to execute some steps of the methods according to the embodiments of the present application.

It should be understood that the Processor may be a Central Processing Unit (CPU), other general purpose Processor, a Digital Signal Processor (DSP), an Application Specific Integrated Circuit (ASIC), etc. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like. The steps of a method disclosed in the incorporated application may be directly implemented by a hardware processor, or may be implemented by a combination of hardware and software modules in the processor.

The memory may comprise a high-speed RAM memory, and may further comprise a non-volatile storage NVM, such as at least one disk memory, and may also be a usb disk, a removable hard disk, a read-only memory, a magnetic or optical disk, etc.

The bus may be an Industry Standard Architecture (ISA) bus, a Peripheral Component Interconnect (PCI) bus, an Extended ISA (EISA) bus, or the like. The bus may be divided into an address bus, a data bus, a control bus, etc. For ease of illustration, the buses in the figures of the present application are not limited to only one bus or one type of bus.

In the above embodiments, the implementation may be wholly or partially realized by software, hardware, firmware, or any combination thereof. When implemented in software, may be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer instructions. When loaded and executed on a computer, cause the processes or functions described in accordance with the embodiments of the application to occur, in whole or in part. The computer may be a general purpose computer, a special purpose computer, a network of computers, or other programmable device. The computer instructions may be stored in a computer readable storage medium or transmitted from one computer readable storage medium to another, for example, from one website site, computer, server, or data center to another website site, computer, server, or data center via wired (e.g., coaxial cable, fiber optic, Digital Subscriber Line (DSL)) or wireless (e.g., infrared, wireless, microwave, etc.). The computer-readable storage medium can be any available medium that can be accessed by a computer or a data storage device, such as a server, a data center, etc., that incorporates one or more of the available media. The usable medium may be a magnetic medium (e.g., floppy Disk, hard Disk, magnetic tape), an optical medium (e.g., DVD), or a semiconductor medium (e.g., Solid State Disk, SSD), among others.

Claims

1. A display device, comprising:

a display screen configured to display image content;

the controller is configured to control the first power supply circuit to send a first signal to a backlight driving circuit, control the second power supply circuit to send a second signal to the backlight driving circuit and send a third signal to the backlight driving circuit after receiving a starting-up instruction;

the backlight driving circuit is configured to control a backlight light source in the backlight assembly to be turned on based on the first signal, the third signal and the second signal after a preset time period; the preset time duration is the starting time when the backlight driving circuit receives the first signal or the third signal, and the ending time of the preset time duration is greater than or equal to the time when the backlight driving circuit receives the second signal;

the first signal is used for indicating the backlight driving circuit to supply power to the backlight light source located in the first area in the backlight assembly, the second signal is used for indicating the backlight driving circuit to supply power to the backlight light source located in the second area in the backlight assembly, and the third signal is used for adjusting the brightness of the backlight light source in the backlight assembly.

2. The display device according to claim 1,

the controller is configured to send a first state of a control signal to the first power circuit after receiving the power-on instruction;

3. The display device according to claim 2,

the first power circuit further configured to provide power to the controller upon receiving a first state of the control signal;

4. The display device according to claim 2,

the first power circuit further configured to, upon receiving a first state of the control signal, supply power to the second power circuit and to send the first state of the control signal to the second power circuit;

5. The display device according to claim 1, wherein the preset time period is a difference between a first time and a second time;

6. The display device according to claim 1, wherein the preset time period is a difference value between a third time and a second time;

7. The display device according to any one of claims 1 to 6,

the controller configured to send a second state of a control signal to the first power circuit upon receiving a standby instruction;

the first power supply circuit is configured to stop supplying the power of the backlight light source in the backlight assembly to the backlight driving circuit when receiving the second state of the control signal; and then stopping supplying power to the backlight driving circuit.

8. The display device according to claim 1, further comprising a TCON circuit,

the TCON circuit is used for preparing image content required to be displayed;

9. The display device of claim 1, wherein the first signal is used to instruct the backlight driving circuit to supply power to backlight light sources in a first area of the backlight assembly, the second signal is used to instruct the backlight driving circuit to supply power to backlight light sources in a second area of the backlight assembly, and the third signal is used to adjust brightness of the backlight light sources in the backlight assembly.

10. The display device of claim 9, wherein the third signal comprises a PWM signal and/or a localdiming signal, wherein the PWM signal is used to control the overall brightness of the backlight light source, and wherein the localdiming signal is used to control the local brightness of the backlight light source based on the image content displayed by the display screen.

11. The display device of claim 8, wherein after the TCON circuit is powered, the controller is further configured to send handshake signals to the TCON circuit;

12. A backlight light source control method is applied to a display device, and the display device comprises: the display screen, the backlight component, the power supply component and the backlight driving circuit;

a display screen configured to display image content;

the method comprises the following steps:

after receiving a starting-up instruction, the controller controls the first power supply circuit to send a first signal to the backlight driving circuit;

the controller controls the second power supply circuit to send a second signal to the backlight driving circuit, and the controller sends a third signal to the backlight driving circuit;

after the backlight driving circuit is subjected to preset duration, controlling a backlight light source in the backlight assembly to be turned on based on the first signal, the third signal and the second signal; the preset time duration is the starting time when the backlight driving circuit receives the first signal or the third signal, and the ending time of the preset time duration is greater than or equal to the time when the backlight driving circuit receives the second signal;

13. The method of claim 12, wherein the controller controls the first power circuit to send a first signal to the backlight driving circuit after receiving a power-on command, comprising:

the backlight driving circuit receives the first signal from the first power supply circuit after the first power supply circuit supplies power to the backlight driving circuit.

14. The method of claim 13, further comprising: