TW202022824A - Low-power-consumption display control method, display control device and information processing device capable of controlling the display of a static picture - Google Patents

Abstract

This invention provides a low-power-consumption display control method including the following steps of: transmitting at least one control command signal and a video signal streaming data to a display control device, wherein the video signal streaming data is stored in a storage unit inside the display control device; dynamically monitoring an update mark of the storage unit and the at least one control command signal; starting at least one handler function (or IP functional block) inside the display control device when a change in the content of the at least one control command signal is monitored or update of the video signal streaming data is described by the update mark; calculating, by the handler function, a plurality of display adjusting parameters according to the video signal streaming data; and storing the plurality of display adjusting parameters in a temporary memory unit of the display control device so as to control the display of a static picture.

Description

Low power consumption display control method, display control device and information processing device

The present invention relates to the technical field of displays, in particular to a display control method and display control device with low power consumption.

The Mobile Industry Processor Interface (MIPI) is an open standard developed by the MIPI Alliance for the display control chip of mobile electronic devices. Figure 1 shows the architecture of the display control chip of the mobile electronic device. As shown in FIG. 1, a display control chip 1'is based on the MIPI DSI (Display Serial Interface) standard protocol to couple a display 3'and a host processor 21' of an electronic device 2', wherein, The electronic device 2'is a mobile electronic device; the display 3'includes a display panel 31' and a panel control circuit 32', and the panel control circuit 32' is used to control the display panel 31' to display images.

As mentioned above, the display control chip 1'mainly includes: a temporary memory unit 11', a control command receiving unit 12', a processing unit 13' and a low-voltage differential signal serial interface unit (LVDS Serial Interface) 14', The temporary storage memory unit 11' is used to temporarily store the video stream data transmitted by the host processor 21', and the control command receiving unit 12' is used to receive at least one control command transmitted by the host processor 21'. For example: display screen switching, display screen parameter adjustment and other control commands. It should be further explained that the processing unit 13' is internally configured with a controller core, a temporary memory unit, and a non-volatile memory, and has a variety of processing functions, including drive control functions Image processing functions and display control functions, wherein the multiple processing functions or intellectual property (Intellectual property, IP) functional blocks are integrated in the non-volatile memory. It can be inferred that if the control command is a picture quality (brightness) adjustment command, the core controller will find a processing function for adjusting picture quality (brightness) from the non-volatile memory and load it Temporary storage unit. Then, according to the control command signal, the core controller of the processing unit 13' can calculate and obtain a plurality of display adjustment parameters based on the video stream data; finally, the processing unit 13' uses the low voltage differential signal (LVDS) sequence The interface unit 14' transmits the video stream data including the plurality of display adjustment parameters to the display 3'.

The control of the display control chip 1'to the display 3'usually includes: image writing and screen display. When the display 3'is controlled to display a static image, the video stream data (that is, multiple frames of images with time continuity) temporarily stored in the temporary memory unit 11' are usually updated at a very low update frequency Update. However, in order to prevent the display 3'from flickering visible to the human eye when displaying a static picture, the display control chip 1'will control the display 3'to display the same frame of image at a high frequency frame rate to complete the display of the static picture .

However, in the process of displaying the static picture on the display 3', if the control command has not changed, the processing unit 13' will repeatedly use the timing control of a timing control unit (not shown in the figure) to realize the The related processing function of the control command is loaded into its internal temporary memory unit. It is conceivable that such an approach will inevitably cause the display control chip 1'to continuously generate power consumption.

To solve the above problems, a novel display control method is urgently needed in the art.

One purpose of the present invention is to provide a low-power display control method, which can be applied to any display control device based on the MIPI DSI standard, especially, in addition to allowing the display control device to stream video according to control command signals In addition to data controlling the dynamic picture display of a monitor, the display control device can also control the static picture display of the monitor with low power consumption.

Another object of the present invention is to provide a display control device, which is compatible with the MIPI DSI standard, and can enable the display control device to control the dynamic picture display of a display according to the control command signal and video stream data and make the display control device operate at low power Control the static picture display of the monitor under the condition of power consumption.

In order to achieve the above objective, a low-power display control method is proposed, which includes the following steps:

(1) Send at least one control command signal and one video stream data to a display control device, wherein the video stream data is stored in a storage unit inside the display control device;

(2) Dynamically monitor an update flag of the storage unit and the at least one control command signal;

(3) When it is detected that the content of the at least one control command signal is changed or the update flag describes that the video stream data has been updated, at least one processing function inside the display control device is activated;

(4) The processing function calculates a plurality of display adjustment parameters based on the video stream data; and

(5) Store the plurality of display adjustment parameters in a temporary memory unit of the display control device to control a static image display.

In an embodiment of the low-power display control method, it further includes the following steps:

(6) The display control device transmits the video stream data including the plurality of display adjustment parameters to the display in a multi-channel manner through a serial interface unit based on the MIPI protocol.

In one embodiment, the display control device receives at least one control command signal and the video stream data from a host processor of an electronic device based on the MIPI protocol.

In one embodiment, the storage unit is a static random-access memory (SRAM).

In one embodiment, the display control device further includes a processing unit, and the processing unit is configured with the temporary memory unit, a core controller, and a non-volatile memory; the at least one processing function ( Or intellectual property (Intellectual property, IP) functional block) is stored in the non-volatile memory.

In order to achieve the above-mentioned purpose, this case further provides a display control device, which includes:

A storage unit for receiving and storing a video stream data;

A control command receiving unit for receiving at least one control command signal;

A dynamic monitoring unit, coupled to the control command receiving unit and the storage unit, for dynamically monitoring an update flag of the storage unit and at least one of the control command signals;

A counting unit coupled to the dynamic monitoring unit; and

A processing unit, including plural processing functions;

Wherein, when the dynamic monitoring unit detects that the update flag describes that the video stream data has been updated or the content of the control command signal is changed, the counting unit generates a function enable signal to make the processing unit follow the function At least one processing function is activated based on the control command signal, and based on the control command signal, the processing function is calculated to obtain a plurality of display adjustment parameters according to the video stream data.

In one embodiment, the display control device receives at least one control command signal and the video stream data from a host processor of an electronic device based on the MIPI protocol.

In an embodiment, the display control device further includes:

A serial interface unit, coupled to the processing unit, is used for transmitting the video stream data including the plurality of display adjustment parameters to a display in a multi-channel manner based on the MIPI protocol.

In one embodiment, the storage unit is a static random access memory, and the processing unit further includes:

A temporary memory unit;

A core controller coupled to the temporary memory unit; and

A non-volatile memory coupled to the core controller for storing the plurality of processing functions; wherein, when the at least one processing function is activated, the core controller loads the processing function The temporary storage memory unit.

Based on the above description, the present invention further provides an information processing device that has the aforementioned display control device to provide a low-power display function, and the information processing device can be a smart phone or a portable computer.

In order to enable your reviewer to further understand the structure, features, purpose, and extreme advantages of the present invention, drawings and detailed descriptions of preferred specific embodiments are attached as follows.

The main principle of the present invention is that: the present invention adds a dynamic monitoring unit and a counting unit inside a display control device to monitor whether the control command and the SDAM update flag description have changed. Among them, if the control command and the update flag description are both If there is no change, the display control device does not need to activate or enable the processing function (or IP), and can directly use the multiple display adjustment parameters calculated by the previous activation processing function as multiple static parameters, and Send the video stream data containing the plurality of static parameters to the display; and if the control command or update flag description changes, the display control device will enable or enable the processing function (or IP) for a period of time to perform The picture is updated.

Please refer to FIG. 2, which is a structural diagram of an embodiment of the display control device of the present invention. As shown in FIG. 2, a display control device 1 is coupled between a display 3 and a host processor 21 of an electronic device 2 based on the MIPI protocol. The electronic device 2 is a mobile electronic device, such as: Tablet computer, smart phone, virtual reality device, or smart watch; the display 3 includes a display panel 31 and a panel control circuit 32; and the display control device 1 includes a storage unit 11, a control command receiving unit 12, a The dynamic monitoring unit 13, a counting unit 14, a processing unit 15 and a serial signal interface unit 16. In particular, the conventional display control chip does not include the dynamic monitoring unit 13 and the counting unit 14 of the present invention.

Under the architecture of FIG. 2, the present invention provides a display control method with low power consumption, so that the display control device 1 can control the screen display of the display 3 with low power consumption. Please refer to FIG. 3, which shows a flowchart of an embodiment of a low-power display control method of the present invention. As shown in FIG. 3, the low-power display control method first performs step S1: transmitting at least one control command signal and a video stream data to the display control device 1, wherein the video stream data is stored in the display In a storage unit 11 inside the control device 1. Then, step S2 is performed: an update flag of the storage unit 11 and at least one of the control command signals are dynamically monitored. It can be seen from FIG. 2 that the display control device 1 receives at least one of the control command signal and the video stream data from the host processor 21 of the electronic device 2 based on the MIPI protocol. Moreover, in the display control device 1, the storage unit 11 stores the video stream data, and the control command receiving unit 12 is used to receive the at least one control command signal. In addition, the dynamic monitoring unit 13 is coupled to the control command receiving unit 12 and the storage unit 11 to dynamically monitor an update flag of the storage unit 11 and at least one of the control command signals, wherein the control command signal is For example, a picture quality (brightness) adjustment command entered by the user is used to drive the display control device 1 to control the display 3 to complete the corresponding display picture adjustment. Simply put, without receiving a new control command signal, the display control device 1 only controls the screen display of the display 3 based on the received video stream data. Therefore, the purpose of performing step S2 is to determine whether it is necessary to adjust the display screen, such as switching or changing the display screen, zooming in or out of the display screen, changing the display quality, or changing the display brightness.

Then perform step S3: when the content of the control command signal is changed or the update flag describes that the video stream data has been updated, enable or enable at least one processing function (or IP function) inside the display control device 1 Square). Then, step S4 is executed: the at least one processing function calculates a plurality of display adjustment parameters according to the video stream data. It must be added that the processing unit 15 usually includes a temporary memory unit, a core controller coupled to the temporary memory unit, and a non-volatile memory, wherein the non-volatile memory is also connected to the core controller The device is coupled and used to store a plurality of processing functions (or IP function blocks). It can be inferred that if the update flag of the storage unit 11 describes that the video stream data has been updated, indicating that the display screen needs to be switched or changed, the processing unit 15 will enable (or enable) at least one corresponding processing function ( Or IP function block) for a period of time to calculate a plurality of display adjustment parameters based on the received video stream data. Similarly, the content change of the control command signal means that the user enters a new screen adjustment command. At this time, the processing unit 15 will also activate (or enable) at least one corresponding processing function (or IP function block) according to the received The video streaming data is used to calculate a plurality of display adjustment parameters.

After obtaining the plurality of display adjustment parameters, the process then proceeds to step S5: storing the plurality of display adjustment parameters in the temporary memory unit of the display control device 1 for use in controlling the display 3 to perform static image display The plural static parameters.

As mentioned above, the processing unit 15 inside the display control device 1 usually includes a temporary memory unit, a core controller, and a non-volatile memory. The core controller loads at least one processing function (or IP function block) The method of temporarily storing the memory unit enables the at least one processing function. Specifically, in order to prevent the processing function (or IP function block) from being continuously activated or enabled while the display 3 is performing static image display, the present invention uses step S5 to transfer the processing function (or IP function block) to ) The calculated plurality of display adjustment parameters are stored in the temporary memory unit as a plurality of static parameters. After that, when the display 3 displays a static picture, if the control command and the update flag description are unchanged, the processing unit 13 does not need to enable or enable the processing function (or IP function block); instead, the processing The unit 13 can directly integrate the plurality of static parameters into the received video stream data. Finally, the display control device 1 transmits the video stream data including the plurality of static parameters to the display 3 in a multi-channel manner through the serial interface unit 16 based on the MIPI protocol. In a possible embodiment, the serial interface unit 16 is a low voltage differential signal serial interface (LVDS Serial Interface).

In addition, in order to increase the access speed of the storage unit 11, a static random-access memory (SRAM) can be used as the storage unit 11. On the other hand, there are many types of processing functions (or IP function blocks), including drive control functions, image processing functions, and display control functions. Moreover, when the display control device 1 is used to control displays 3 of different brands, the actual content of the drive control function, the image processing function, and the display control function are also different. For this reason, the various processing functions (or IP function blocks) are usually integrated in the non-volatile memory inside the processing unit 15 to facilitate the core controller of the processing unit 15 to be accessed and activated in real time.

According to the above description, the present invention further provides an information processing device, which has the aforementioned display control device 1 to provide a low-power display function, and the information processing device can be a smart phone or a portable computer.

In this way, the above has completely and clearly explained the principle and technical features of the present invention, and it can be learned from the above that the present invention has the following advantages:

(1) The low-power display control method of the present invention can be applied to any display control device based on the MIPI DSI standard, and the method can not only allow the display control device to control a display according to the control command signal and video stream data In addition to the dynamic picture display, the display control device can also control the static picture display of the display with low power consumption.

(2) The display control device of the present invention can comply with the MIPI DSI standard, and can make the display control device control the dynamic picture display of a display according to the control command signal and the video stream data and make the display control device control with low power consumption The static picture display of the monitor.

In addition, it must be emphasized that the foregoing disclosure is the preferred embodiment of this case, and any partial changes or modifications that are derived from the technical ideas of this case and are easily inferred by those who are familiar with the art will not deviate from this case. The scope of patent rights.

In summary, regardless of the purpose, means or effect of this case, it is shown that it is very different from the conventional technology, and its first invention is suitable for practicality, and it does meet the patent requirements of the invention. Please check it out and grant the patent as soon as possible. Society is for the best prayer.

<Invention> Step S1: Send at least one control command signal and a video stream data to a display control device, wherein the video stream data is stored in a storage unit inside the display control device. Step S2: Store the data An update flag of the unit and the at least one control command signal are dynamically monitored. Step S3: When it is detected that the content of the at least one control command signal has changed or the update flag describes that the video stream data has been updated, enable the At least one processing function inside the display control device Step S4: The processing function calculates a plurality of display adjustment parameters based on the video stream data Step S5: Store the plurality of display adjustment parameters in the display control device A temporary storage memory unit to control a static picture display 1: display control device 2: electronic device 3: display 11: storage unit 12: control command receiving unit 13: dynamic monitoring unit 14: counting unit 15: processing unit 16: Serial signal interface unit 21: host processor 31: display panel 32: panel control circuit

<Common knowledge> 1': Display control chip 11': Temporary memory unit 12': Control command receiving unit 13': Processing unit 14': Low-voltage differential signal serial interface unit 2': Electronic device 21': Host processor 3 ':Display 31':display panel 32':panel control circuit

Fig. 1 is a structural diagram of a display control chip of a conventional mobile electronic device; Fig. 2 is a structural diagram of an embodiment of a display control device of the present invention; and Fig. 3 is an embodiment of a low-power display control method of the present invention Flow chart.

Step S1: Send at least one control command signal and one video stream data to a display control device, wherein the video stream data is stored in a storage unit inside the display control device

Step S2: Dynamically monitor an update flag of the storage unit and the at least one control command signal

Step S3: When it is detected that the content of the at least one control command signal has changed or the update flag describes that the video stream data has been updated, at least one processing function in the display control device is activated

Step S4: The processing function calculates a plurality of display adjustment parameters based on the video stream data

Step S5: Store the plurality of display adjustment parameters in a temporary memory unit of the display control device to control a static image display

Claims (10)

A low-power display control method, which includes the following steps: (1) At least one control command signal and a video stream data are transmitted to the display control device, wherein the video stream data is stored in an internal part of the display control device Storage unit; (2) dynamically monitor an update flag of the storage unit and the at least one control command signal; (3) when it is detected that the content of the at least one control command signal changes or the update flag describes the video When the streaming data has been updated, at least one processing function inside the display control device is enabled; (4) The processing function calculates a plurality of display adjustment parameters based on the video streaming data; and (5) The plurality of display adjustment parameters are stored in a temporary memory unit of the display control device to control a static image display. The low-power display control method described in item 1 of the scope of patent application further includes the following steps: The display control device uses a serial interface unit to convert the video stream containing the plurality of display adjustment parameters based on the MIPI protocol The data is transmitted to the display in a multi-channel manner. The low-power display control method according to the first item of the scope of patent application, wherein, in this step (1), the display control device receives the at least one from a host processor of an electronic device based on the MIPI protocol. A control command signal and the video stream data. In the low-power display control method described in the first item of the scope of patent application, the storage unit is a static random access memory. For example, in the low-power display control method described in the scope of the patent application, the display control device further includes a processing unit, and the processing unit is internally configured with the temporary memory unit, a core controller and a non- Volatile memory, and the at least one processing function is stored in the non-volatile memory. A display control device including: a storage unit for receiving and storing a video stream data; a control command receiving unit for receiving at least one control command signal; a dynamic monitoring unit coupled to the control command receiving The unit and the storage unit are used to dynamically monitor an update flag and at least one of the control command signals of the storage unit; a counting unit coupled to the dynamic monitoring unit; and a processing unit including multiple processing functions Wherein, when the dynamic monitoring unit detects that the update flag describes that the video stream data has been updated or the content of the control command signal is changed, the counting unit generates a function enable signal to make the processing unit follow the A function activation signal activates at least one of the processing functions, and based on the control command signal, the processing function is instructed to calculate and obtain a plurality of display adjustment parameters according to the video stream data. According to the display control device described in item 6 of the scope of patent application, it receives the at least one control command signal and the video stream data from a host processor of an electronic device based on the MIPI protocol. For example, the display control device described in item 6 of the scope of the patent application further includes: a serial interface unit, coupled to the processing unit, for converting the video stream data including the plurality of display adjustment parameters based on the MIPI protocol Transmit to a display in a multi-channel manner. For the display control device described in item 6 of the scope of patent application, the storage unit is a static random access memory, and the processing unit further includes: a temporary storage unit; a core controller coupled to the A temporary memory unit; and a non-volatile memory coupled to the core controller for storing the plurality of processing functions; wherein, when the at least one processing function is activated, the core controller will The at least one processing function is loaded into the temporary storage unit. An information processing device having the display control device described in any one of items 6-9 in the scope of patent application.

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