CN118226977A - Touch display method, device, equipment, system and readable storage medium - Google Patents
Touch display method, device, equipment, system and readable storage medium Download PDFInfo
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
- G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
- G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
- G06F3/0416—Control or interface arrangements specially adapted for digitisers
- G06F3/04162—Control or interface arrangements specially adapted for digitisers for exchanging data with external devices, e.g. smart pens, via the digitiser sensing hardware
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
- G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
- G06F3/033—Pointing devices displaced or positioned by the user, e.g. mice, trackballs, pens or joysticks; Accessories therefor
- G06F3/0354—Pointing devices displaced or positioned by the user, e.g. mice, trackballs, pens or joysticks; Accessories therefor with detection of 2D relative movements between the device, or an operating part thereof, and a plane or surface, e.g. 2D mice, trackballs, pens or pucks
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
- G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
- G06F3/033—Pointing devices displaced or positioned by the user, e.g. mice, trackballs, pens or joysticks; Accessories therefor
- G06F3/0354—Pointing devices displaced or positioned by the user, e.g. mice, trackballs, pens or joysticks; Accessories therefor with detection of 2D relative movements between the device, or an operating part thereof, and a plane or surface, e.g. 2D mice, trackballs, pens or pucks
- G06F3/03545—Pens or stylus
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
- G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
- G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
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Abstract
The application relates to a touch display method, a touch display device, touch display equipment, touch display system and a readable storage medium. The touch display method is applied to an application processor and comprises the following steps: receiving a transmission enabling signal sent by a touch display chip; determining a first target period of time for the touch display chip to receive a downlink signal sent by an active pen according to the transmission enabling signal, wherein the transmission enabling signal and the downlink signal have a preset time sequence relationship; and determining a second target period according to the first target period so as to send a display data signal to the touch display chip in the second target period, wherein the second target period is staggered with the first target period. The application processor can select the unoccupied second target period to send the display data signal to the touch display chip, so that the time for receiving and transmitting the signal by the touch display chip is prevented from overlapping, and the influence of signal time sequence conflict on the touch effect is further effectively restrained.
Description
Technical Field
The present application relates to the field of display technologies, and in particular, to a touch display method, device, apparatus, system, and readable storage medium.
Background
With the development of display technology, more and more touch display devices are required to support an active pen function, and a user can implement writing on the touch display device by manipulating the active pen. Compared with the conventional finger touch function, the touch display device is required to receive the downlink signal more frequently by the following chirality of the active pen, but the limitation of the prior art is hindered, and the uplink signal sent to the active pen by the touch display device is easy to collide with the downlink signal or the display data signal, so that the touch is invalid, and the touch effect of the touch display device is affected.
Disclosure of Invention
In view of the foregoing, it is desirable to provide a touch display method, apparatus, device, system, and readable storage medium that can avoid collision between an uplink signal of an active pen and other signals.
In a first aspect, the present application provides a touch display method, applied to an application processor, where the touch display method includes:
Receiving a transmission enabling signal sent by a touch display chip;
Determining a first target period of time for the touch display chip to receive a downlink signal sent by an active pen according to the transmission enabling signal, wherein the transmission enabling signal and the downlink signal have a preset time sequence relationship;
And determining a second target period according to the first target period so as to send a display data signal to the touch display chip in the second target period, wherein the second target period is staggered with the first target period.
In a second aspect, the present application provides a touch display method, applied to a touch display chip, where the touch display method includes:
If the touch display chip and the active pen are in a connection state, an uplink signal is sent to the active pen so as to instruct the active pen which receives the uplink signal to send a downlink signal to the touch display chip in a first target period;
And sending a transmission enabling signal to an application processor so as to instruct the application processor to send a display data signal to the touch display chip in a second target period, wherein the second target period is staggered with the first target period.
In a third aspect, the present application provides a touch display device, including:
the application processor is used for executing the touch display method;
And the touch display chip is connected with the application processor and is used for executing the touch display method.
In a fourth aspect, the present application provides a touch display system, including:
the touch display device is as described above;
and the active pen is used for responding to the uplink signal sent by the touch display equipment and sending the downlink signal to the touch display equipment in a first target period.
In a fifth aspect, the present application provides a touch display device, including:
The transmission enabling signal receiving module is used for receiving the transmission enabling signal sent by the touch display chip;
A first period determining module, configured to determine, according to the transmission enabling signal, a first target period during which the touch display chip receives a downlink signal sent by an active pen, where the transmission enabling signal and the downlink signal have a preset timing relationship;
And the second time period determining module is used for determining a second target time period according to the first target time period so as to send a display data signal to the touch display chip in the second target time period, wherein the second target time period is staggered with the first target time period.
In a sixth aspect, the present application provides a touch display device, including:
the uplink signal sending module is used for sending an uplink signal to the active pen if the touch display chip is in a connection state with the active pen, so as to instruct the active pen which receives the uplink signal to send a downlink signal to the touch display chip in a first target period;
and the transmission enabling signal sending module is used for sending a transmission enabling signal to the application processor so as to instruct the application processor to send a display data signal to the touch display chip in a second target period, wherein the second target period is staggered with the first target period.
In a seventh aspect, the present application provides a computer readable storage medium having stored thereon a computer program which when executed by a processor performs the steps of the method described above.
In an eighth aspect, the application provides a computer program product comprising a computer program which, when executed by a processor, implements the steps of the method described above.
In the touch display method, the device, the equipment, the system and the readable storage medium, the touch display chip has a preset time sequence relationship between the transmission enabling signal and the receiving downlink signal, and the time sequence relationship is stored in the application processor in advance. Accordingly, when the application processor receives the transmission enable signal, the first target period can be determined based on the stored timing relationship and the transceiving time information of the transmission enable signal. That is, the application processor may determine a period in which the touch display chip may be occupied to receive the downlink signal. Accordingly, the application processor can select the unoccupied second target period to send the display data signal to the touch display chip, so that the time overlapping of the signal receiving and sending of the touch display chip is avoided, namely the problem of collision between the signal receiving and sending of the touch display chip is avoided, and further the influence of signal time sequence collision on the touch effect is effectively restrained.
Drawings
Fig. 1 is an application scenario diagram of a touch display method of the present embodiment;
FIG. 2 is a flowchart of a touch display method according to an embodiment;
FIG. 3 is a flowchart of determining a first target period for the touch display chip to receive a downlink signal according to a transmission enable signal according to an embodiment;
FIG. 4 is a signal timing diagram of the application processor and the touch display chip;
FIG. 5 is a signal timing diagram of a timing matched application processor and touch display chip;
FIG. 6 is a signal timing diagram of an application processor and a touch display chip with timing conflicts;
FIG. 7 is a signal timing diagram of an application processor and a touch display chip according to an embodiment;
FIG. 8 is a flow chart of determining a second target period for transmitting a display data signal according to a first target period, according to an embodiment;
FIG. 9 is a second flowchart of a touch display method according to an embodiment;
FIG. 10 is a third flowchart of a touch display method according to an embodiment;
FIG. 11 is a schematic diagram of a touch display device according to an embodiment;
FIG. 12 is a block diagram of a touch display device according to an embodiment;
FIG. 13 is a second block diagram of a touch display device according to an embodiment;
Fig. 14 is an internal structure diagram of a touch display device according to an embodiment.
Detailed Description
The present application will be described in further detail with reference to the drawings and examples, in order to make the objects, technical solutions and advantages of the present application more apparent. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the application.
The application provides a touch display method which can be applied to any touch display device capable of being connected with an active pen. The touch display device can be, but not limited to, various personal computers, notebook computers, smart phones, tablet computers, internet of things devices and portable wearable devices, and the internet of things devices can be intelligent sound boxes, intelligent televisions, intelligent air conditioners, intelligent vehicle-mounted devices and the like. The portable wearable device may be a smart watch, smart bracelet, headset, or the like.
Fig. 1 is an application scenario diagram of a Touch display method of the present embodiment, and referring to fig. 1, a Touch display device includes an application processor 102 (Application Processor, AP), a Touch display chip 104 (Touch AND DISPLAY DRIVER Integration, TDDI), and a Touch display screen 106. The application processor 102 is connected to the touch display chip 104, and is configured to generate a display data signal and transmit the generated display data signal to the touch display chip 104. The touch display chip 104 is connected to the touch display screen 106, and is configured to drive the touch display screen 106 to display an image according to the received display data signal. The touch display chip 104 is further configured to receive a downlink signal from the active pen, where the downlink signal may carry information about writing pressure during writing of the active pen. Furthermore, the downlink signal can also carry information of key conditions in the writing process of the active pen, the keys are arranged on the pen body of the active pen, and a user can adjust writing parameters of the active pen through operations such as touching, knocking and sliding the keys. Among other things, adjustable writing parameters may include, but are not limited to, writing color, handwriting mode, usage mode, and whether to turn on nib vibration. Handwriting patterns include, but are not limited to, handwriting thickness and handwriting type. For example, the user may select to switch the writing color to any one of black, blue, red, etc., or to switch the handwriting thickness to any one of thick, medium, thin, etc., or to switch the handwriting type to any one of pen, pencil, highlighter, etc., or to switch the usage mode to any one of writing mode and eraser mode, or to turn on the nib vibration function to simulate a real writing experience, by pressing a button. Moreover, the user can adjust different writing parameters through different gestures on the keys, for example, long pressing the key to adjust writing color, short pressing the key to adjust using mode, knocking the key to adjust handwriting type, and sliding a finger on the key to adjust handwriting thickness. The pen body can also be provided with a plurality of keys, and different keys are respectively used for adjusting different writing parameters. Still further, the downlink signal may also carry information on the battery level of the active pen. The specific content of the downlink signal is only for illustration, and is not intended to limit the scope of the present embodiment, and other information related to the state of the active pen may be transmitted together in the downlink signal.
Alternatively, since the writing pressure determines the strokes displayed by the image, and whether the user is writing or drawing, the strokes are critical to the realism and aesthetic appeal of the writing. Therefore, on the premise that the user starts the automatic pen touch function, each downlink signal can carry information of writing pressure so as to improve writing effect. The information of the key condition and the information of the battery power can be understood as information which is not changed frequently, so that the active pen can load the changed information into the downlink signal for transmission only when the key condition and the battery power are changed, for example, writing parameters associated with touch operation are loaded into the downlink signal when a user touches the key, or real-time battery power is loaded into the downlink signal when the battery power is reduced, thereby reducing the quantity of information needed to be carried in the downlink signal and reducing the power consumption of the active pen for transmitting the downlink signal.
Specifically, in the process of writing and displaying once, the active pen sends a downlink signal, the touch display chip 104 determines the writing position of the active pen according to the touch electrode that receives the downlink signal, and decodes the downlink signal to obtain writing pressure information, key condition information, battery power information and the like carried by the downlink signal. The touch display chip 104 transmits the decoding result and the writing position obtained by sensing to the application processor 102. The application processor 102 generates a writing layer according to the received data, combines the writing layer with an application program interface layer and the like to generate data to be displayed of a frame of image, and sends a display data signal carrying the data to be displayed to the touch display chip 104. The touch display chip 104 drives the touch display screen 106 according to the received display data signal, thereby realizing the display of one frame of image.
Fig. 2 is one of flowcharts of a touch display method according to an embodiment, which is applied to the application processor 102 in the application scenario of fig. 1, and referring to fig. 2, the touch display method includes steps 202 to 206.
Step 202, a transmission enabling signal sent by the touch display chip is received.
The type of the transmission enable signal may be a General-Purpose Input/Output (GPIO) signal. Accordingly, the application processor is configured with a first GPIO interface, the touch display chip is configured with a second GPIO interface, and the touch display chip sends a transmission enabling signal to the application processor through the first GPIO interface and the second GPIO interface which are arranged in pairs.
Optionally, the transmission enable signal is a tearing signal, and the tearing signal refers to a tearing effect (TEAR EFFECT, TE) signal generated by the touch display chip. Specifically, the touch display device may be classified into a Command Mode (Command Mode) display device and a Video Mode (Video Mode) display device according to an interface Mode. In the touch display device in the command mode, a Buffer (Line Buffer) is provided on the touch display chip, where the Buffer is used to store frame data, and the frame data refers to data to be displayed of a frame of image sent to the touch display chip by the application processor in a certain refresh period. The application processor writes frame data into the buffer under the control of the tearing signal, and the touch display chip reads the frame data from the buffer under the control of the tearing signal, so that tearing during image display is avoided. For example, the application processor starts writing data into the buffer at the rising edge of the tear signal, and the touch display chip starts reading frame data from the buffer at the falling edge of the tear signal.
The touch display device of the embodiment of the application is a video mode display device. In the touch display device in the video mode, the application processor actively and continuously sends display data signals to the touch display chip periodically, so that frame-by-frame display of pictures is realized. That is, the application processor of the present embodiment is configured to determine a display frame rate (FRAME RATE), and after determining the display frame rate, send a display data signal to the touch display chip according to the determined display frame rate. Therefore, compared with the video mode display device in the related art, the embodiment can further realize the timing synchronization between the application processor and the touch display chip in the scene of writing by the active pen by setting the tearing signal.
Step 204, determining a first target period when the touch display chip receives the downlink signal sent by the active pen according to the transmission enabling signal.
The transmission enabling signal and the downlink signal have a preset time sequence relation. For example, the preset time sequence relationship may be that the touch display chip continuously receives a downlink signal within a preset period after sending the transmission enabling signal and waiting for a certain period of time, or the touch display chip intermittently receives a plurality of downlink signals within a preset period after sending the transmission enabling signal and waiting for a certain period of time, or the touch display chip starts to receive the downlink signal immediately after sending the transmission enabling signal and stops receiving the downlink signal after a certain period of time. It should be noted that the above timing relationship is only used for illustration, and is not used to limit the protection scope of the present embodiment. Specifically, the timing relationship has been set in the application processor in advance, and the timing relationship may be configured in a register of the application processor or stored in the application processor in the format of an xml file, for example. Therefore, after receiving the transmission enabling signal, the application processor can calculate and acquire a first target period of time for the touch display chip to receive the downlink signal sent by the active pen by calling the corresponding time sequence relation.
Step 206, determining a second target period according to the first target period, so as to send a display data signal to the touch display chip in the second target period.
Wherein the second target period is staggered from the first target period. It can be understood that if the second target period is not determined according to the first target period, when the touch display chip needs to keep a connection state with the active pen and receives the downlink signal sent by the active pen, the application processor can only send the display data signal to the touch display chip at several fixed display frame rates, where the several fixed display frame rates are display frame rates at which no signal timing conflicts will occur. Therefore, the application processor cannot flexibly select any other display frame rate than the fixed display frame rate. Moreover, in order to ensure the handedness of the active pen, to minimize the time delay between the image displayed in real time and the writing operation of the user, the application processor will typically set the display frame rate at a maximum value, resulting in excessive power consumption of the touch display chip. For example, the power consumption of a touch display chip at a display frame rate of 120Hz is expected to be 1.x times that at a display frame rate of 60 Hz. However, in a scenario where, for example, the power of the touch display device is insufficient, but the user does need to perform active pen writing, the touch display device often cannot flexibly adjust the display frame rate due to the foregoing signal timing conflict problem, so that the standby time of the touch display device cannot be prolonged.
In this embodiment, by receiving the transmission enabling signal, the application processor may select the unoccupied second target period to send the display data signal to the touch display chip, so as to avoid overlapping of time when the touch display chip receives and sends the signal, that is, avoid the problem of collision between the touch display chip and the receiving and sending the signal, and further effectively inhibit the influence of the signal timing collision on the touch effect. Accordingly, the application processor can switch any one of the minimum display frame rate and the maximum display frame rate, so that a touch display method with a good display effect can be provided according to actual display requirements.
In one embodiment, the display data signal is a signal that can directly drive the touch display. That is, the touch display chip does not need to process the received display data signal, but directly transmits the display data signal to each data line of the touch display screen, so that accurate display of one frame of picture can be realized. It can be understood that if the signal timing sequence of the second target period and the first target period staggered is not adopted, even if the display data signal is a signal capable of directly driving the touch display screen, in order to avoid the problem of data transmission failure caused by signal timing sequence conflict, a buffer is usually required to be set in the touch display chip to buffer data. The buffer is typically a line buffer of 110 to 200 lines. In this embodiment, since the problem of signal timing conflict does not occur, the display data signal can be directly transmitted to each data line of the touch display screen through the touch display chip, so that a buffer in the touch display chip can be omitted, the volume of the touch display chip can be reduced, and the power consumption of the touch display chip can be reduced.
Fig. 3 is a flowchart of determining a first target period for the touch display chip to receive the downlink signal according to the transmission enable signal according to an embodiment, and referring to fig. 3, in one embodiment, the steps include steps 302 to 304.
Step 302, obtaining the sending time information of the corresponding uplink signal carried by the transmission enabling signal.
The uplink signal is a signal sent to the active pen by the touch display chip. The active pen can decode the received uplink signal and respond according to the decoding result, so that communication with the touch display chip is realized. Alternatively, the touch display chip may send the uplink signal multiple times per second, which is not limited in this embodiment. The sending time information of the uplink signal may be sending time information of the uplink signal, the touch display chip may generate a transmission enabling signal carrying the sending time information of the uplink signal, and the application processor may learn a specific time of sending the uplink signal by the touch display chip by receiving and analyzing the transmission enabling signal.
Step 304, determining a first target period of time for the touch display chip to receive the downlink signal according to the sending time information and a preset downlink signal interval.
The downlink signal interval is a time interval between sending an uplink signal and receiving a downlink signal by the touch display chip. That is, the active pen is configured to determine a first target period for transmitting the downlink signal according to the transmission time information of the uplink signal after receiving the uplink signal, thereby ensuring time alignment between the active pen and the touch display chip. Specifically, fig. 4 is a signal timing diagram of the application processor and the touch display chip, and referring to fig. 4, in one refresh period, the timing of the Application Processor (AP) may be divided into an Active period and a Vporch period. The Active period is used for transmitting a display data signal to the touch display chip (TDDI), and the Vporch period can also be called a vertical interval period, and the duration of the vertical interval period is different from each other according to the difference of the display frame rate. That is, on the premise that the total data amount of one frame of image is unchanged, the duration of the Active period is the same, and the duration of the Vporch period is changed along with the display frame rate, so that the adjustment of the refresh interval of the display data signal is realized. When there is no signal timing conflict, the Touch display chip (TDDI) sends an uplink signal to the Active pen in Vporch time period, and alternately transmits a display data signal and a Touch Processing (TP) signal in Active time period, where the Touch Processing signal includes a downlink signal from the Active pen, and may further include other Touch related signals processed by the Touch display chip.
If the technical scheme of the embodiment of the application is not adopted, but the application processor determines the sending time of the display data signal only according to the display frame rate, when the application processor selects the transmission time periods of the display data signal and the downlink signal, the application processor needs to determine the transmission time period of the display data signal first and identify that the touch display chip can transmit the downlink signal when the display data signal is not transmitted, so that the problem of signal timing conflict of the touch display chip can occur. That is, the display data signal is dominant at the time of timing distribution in the signal transmission process, and the downstream signal is subordinate. Moreover, since the active pen cannot learn whether the writing position of the active pen moves through the internal structure, the active pen can only judge whether the active pen is in a writing state according to whether the active pen can receive an uplink signal. That is, if the active pen receives the uplink signal, it determines that the active pen is in a writing state in a future period of time, and sends the downlink signal accordingly, where the future period of time refers to a period of time from when the current uplink signal is received to when the next uplink signal should be received, and the duration of the future period of time is equal to the sending time interval of the uplink signal. Similarly, if the active pen does not receive the uplink signal, it is determined that the active pen is in an unwritten state for a future period of time, and the transmission of the downlink signal is stopped. Also, during this period of time, the written state and the unwritten state of the active pen do not switch. Therefore, in each first target period in a period of time when the uplink signal is received, the active pen sends the downlink signal to the touch display chip.
Specifically, when the dot rate of the active pen is matched with the display frame rate, the signal timing sequence of the application processor and the signal timing sequence of the touch display chip cannot conflict. Fig. 5 is a signal timing diagram of an application processor and a touch display chip with timing matching, referring to fig. 5, in a case where the signal timing of the application processor is matched with the signal timing of the touch display chip, for example, when the dot rate of the active pen is 120Hz and the display frame rate is 120Hz and 60Hz, the touch display chip can send an uplink signal to the active pen in the Vporch period of the application processor, and no conflict of the signal timing exists. It is understood that no signal timing collision occurs at display frame rates of 30Hz, 15Hz, etc., i.e., the dot count rate is an integer multiple of the display frame rate. However, when the dot rate of the active pen does not match the display frame rate, the signal timing of the application processor may collide with the signal timing of the touch display chip. Fig. 6 is a signal timing diagram of an application processor and a touch display chip with timing conflict, referring to fig. 6, when the display frame rate is 90Hz, the touch display chip keeps sending an uplink signal to an active pen according to the timing with the report point rate of 120Hz, but due to the change of the display frame rate, the application processor determines that the touch display chip needs to transmit a downlink signal in the same period, but the touch display chip cannot transmit the uplink signal and the downlink signal at the same time, so that there may be a situation that the sending period of the uplink signal and the receiving period of the downlink signal shown in fig. 6 overlap (the period filled by oblique lines in fig. 6 is a period where the uplink signal and the downlink signal overlap), and further a problem of abnormal communication occurs.
Fig. 7 is a signal timing diagram of an application processor and a touch display chip according to an embodiment, referring to fig. 7, similar to the example of fig. 6, the dot count rate of the active pen is 120Hz, and for the display frame rates where no signal timing conflict occurs, such as 120Hz and 60Hz shown in fig. 7, the timing of the application processor and the touch display chip is the same as that of fig. 5, without special settings. But for a display frame rate at which a signal timing conflict may occur, such as 90Hz shown in fig. 7, etc., the application processor adjusts the transmission period of the display data signal according to the transmission time information of the uplink signal. That is, in this embodiment, the transmission periods of the uplink signal and the downlink signal are dominant, the display data signal is subordinate, and other idle time is selected to transmit the display data signal, so that the problem of signal timing conflict is effectively avoided.
In this embodiment, since the application processor can learn the sending time information of the uplink signal, and can determine the first target period according to the sending time information and the interval between the downlink signals, the application processor can accurately acquire the time when the touch display chip transmits the downlink signal and the display data signal. Therefore, when the active pen sends the downlink signal, the touch display chip is ready to receive the downlink signal, so that the collision and loss of the signal can be effectively avoided, the problems of touch breaking and the like in the writing process of the active pen can be reduced, and the fluency of the writing process is improved.
Fig. 8 is a flowchart of determining a second target period for transmitting a display data signal according to a first target period according to an embodiment, and referring to fig. 8, in one embodiment, the steps include steps 802 to 804.
Step 802, determining a first starting time of sending a display data signal corresponding to a frame of image according to a display frame rate.
Specifically, the application processor may acquire the transmission interval of the display data signals of the adjacent two-frame images according to the display frame rate. For example, if the display frame rate is 90Hz, the transmission time interval is 11.1ms. Accordingly, the application processor can determine the first start timing of transmitting the display data signal of the current frame image based on the transmission interval and the transmission start timing of the display data signal of the previous frame image.
Step 804, determining the number of periods of the second target period required for transmitting one frame of image according to the first data amount of one frame of image and the second data amount of the second target period for transmitting the display data signal.
The first data amount of one frame of image refers to the total data amount of one frame of image, and the total data amount can be determined according to the resolution of the image, for example, the total data amount of 1920×1080 images is greater than the total data amount of 1440×810 images. The second data amount in which the display data signal is transmitted in one second target period may be determined according to the signal transmission speed and the duration of the second target period. The larger the signal transmission speed and the length of the second target period, the larger the second data amount. The signal transmission speed may be determined by a communication mode, a bandwidth, and the like, and the embodiment is not limited thereto. It will be appreciated that if the total data amount of one frame of image is large, the transmission of all data may not be completed in one second target period, for example, in the embodiment shown in fig. 7, four second target periods may be required to complete the transmission of all data of one frame of image. With continued reference to the timing at 90Hz of fig. 7, at some display frame rates, there may be a portion of the display data signal transmitted between adjacent transmission periods of two downlink signals, another display data signal transmitted between adjacent transmission periods of one downlink signal and one uplink signal, and the duration between adjacent transmission periods of two downlink signals is not exactly the same as the duration between transmission periods of one downlink signal and one uplink signal. Thus, the second data amounts corresponding to the different second target periods may not be identical. When the number of time periods is acquired, an average value of data amounts of transmission display data signals under the time periods of different second target time periods may be used as the second data amount, or may be calculated according to actual data amounts under the time periods of each second target time period, which is not limited in this embodiment.
Step 806, determining a second starting time corresponding to each second target period for transmitting all display data signals of one frame of image according to the first starting time and the period number.
In this embodiment, the number of periods of the second target period required for transmitting one frame of image may be obtained according to the first data amount and the second data amount, so as to determine the second start time corresponding to each second target period, and realize accurate control of the signal transceiving timing.
Fig. 9 is a second flowchart of a touch display method according to an embodiment, referring to fig. 9, in one embodiment, the touch display method includes steps 902 to 912. Steps 906 to 910 may refer to the foregoing embodiments, and are not described herein.
In step 902, a plurality of layers to be displayed of a frame of image are obtained.
And 904, performing layer stacking processing and enhancement processing on the plurality of layers to be displayed to acquire data to be displayed of one frame of image to be displayed, and caching the data to be displayed.
The plurality of layers to be displayed comprise writing layers generated according to downlink signals. The application processor firstly acquires layers such as an application program interface layer, and then carries out layer stacking processing and enhancement processing on the writing layer, the application program interface layer and the like so as to acquire data to be displayed of a frame of image to be displayed, and the data to be displayed is cached in a buffer at the end of the application processor.
Step 906, receiving a transmission enabling signal sent by the touch display chip.
Step 908, determining, according to the transmission enabling signal, a first target period during which the touch display chip receives the downlink signal sent by the active pen.
Step 910, determining a second target period according to the first target period, so as to send a display data signal to the touch display chip in the second target period.
In step 912, a display data signal is generated and sent to the touch display chip according to the cached data to be displayed in the second target period.
Specifically, when the application processor receives the transmission enabling signal and determines the second target period based on the transmission enabling signal, if the data to be displayed is stored in the buffer, the data to be displayed can be read from the buffer, and corresponding display data signals are generated according to the second data amount which can be transmitted in each second target period, so that the display data signals are transmitted to the touch display chip through the display pixel interface (DISPLAY SERIAL INTERFACE, DSI). The DSI interface is a MIPI interface which is particularly suitable for being used in the display field, is generated based on MIPI protocol, and has the advantages of low cost and high speed compared with the traditional RGB interface.
The embodiment of the application also provides a touch display method applied to the touch display chip 104 in the application scenario of fig. 1, fig. 10 is a third flowchart of the touch display method of an embodiment, and referring to fig. 10, the touch display method includes steps 1002 to 1004.
Step 1002, if the touch display chip and the active pen are in a connection state, an uplink signal is sent to the active pen to instruct the active pen that receives the uplink signal to send a downlink signal to the touch display chip in a first target period.
It can be understood that if the touch display chip and the active pen are not in a connection state, the touch display chip does not need to send an uplink signal or receive a downlink signal from the active pen. Accordingly, the touch display chip can not generate signal time sequence conflict, and the application processor can not need to adjust the time sequence of sending the display data signals, so that the signal sending logic of the application processor is simplified. In addition, because the range that the active pen can receive the uplink signal is smaller than the range that the active pen can establish connection with the touch display chip, even if the touch display chip is in a connection state with the active pen under some conditions, the active pen can receive the uplink signal only when approaching the touch display screen, and the active pen can write only when approaching the touch display screen. Therefore, when the active pen is in a connection state with the touch display chip, but the active pen is not close to the touch display screen, the active pen cannot receive the uplink signal, and accordingly, the active pen cannot send the downlink signal to the touch display chip in the first target period.
In step 1004, a transmission enabling signal is sent to the application processor to instruct the application processor to send a display data signal to the touch display chip in a second target period.
Wherein the second target period is staggered from the first target period. In this embodiment, by staggering the second target period and the first target period, the application processor may select the unoccupied second target period to send the display data signal to the touch display chip, thereby avoiding overlapping of time when the touch display chip receives and transmits the signal, that is, avoiding the problem of collision between the touch display chip and the signal, and further effectively inhibiting the influence of signal timing collision on the touch effect.
In one embodiment, the step of sending a transmission enable signal to the application processor comprises the steps of: a transmission enable signal carrying the transmission time information of the uplink signal is generated and transmitted to the application processor. Specifically, the sending time information of the uplink signal may be sending time information of the uplink signal, and the touch display chip may generate a transmission enabling signal carrying the sending time information of the uplink signal, so that the application processor learns, by receiving and analyzing the transmission enabling signal, a time when the touch display chip sends the uplink signal. In this embodiment, based on the stored downlink signal interval between the uplink signal and the downlink signal, the application processor may determine the first target period for transmitting the downlink signal according to the transmission time information of the uplink signal, so as to avoid a timing conflict between the transmit and receive signals of the touch display chip.
In one embodiment, the uplink signal and the transmission enable signal are transmitted simultaneously so that the transmission time information of the uplink signal and the transmission enable signal is the same. Specifically, when the uplink signal and the transmission enable signal are transmitted simultaneously, the transmission time information of the uplink signal is the same as the transmission time information of the transmission enable signal, in which case, the application processor may also learn the time when the touch display chip transmits the uplink signal, without special setting of the information carried by the transmission enable signal, so as to determine the first target period. Alternatively, the application processor may acquire the time stamp of the transmission enable signal, thereby determining the transmission timing information of the transmission enable signal and the uplink signal. Further, if the transmission enable signal is a GPIO signal, based on the transmission characteristic of the GPIO signal, the delay on the path of the transmission enable signal is very small, and the application processor can directly use the receiving time information corresponding to the receiving time stamp of the transmission enable signal as the transmitting time information, so that the transmitting time information of the uplink signal can be simply obtained.
It should be understood that, although the steps in the flowcharts related to the above embodiments are sequentially shown as indicated by arrows, these steps are not necessarily sequentially performed in the order indicated by the arrows. The steps are not strictly limited to the order of execution unless explicitly recited herein, and the steps may be executed in other orders. Moreover, at least some of the steps in the flowcharts described in the above embodiments may include a plurality of steps or a plurality of stages, which are not necessarily performed at the same time, but may be performed at different times, and the order of the steps or stages is not necessarily performed sequentially, but may be performed alternately or alternately with at least some of the other steps or stages.
The embodiment of the application further provides a touch display device, fig. 11 is a schematic structural diagram of the touch display device according to an embodiment, and referring to fig. 11, the touch display device includes an application processor 1102 and a touch display chip 1104. The application processor 1102 is configured to execute the touch display method described above, and the touch display chip 1104 is connected to the application processor 1102 and is configured to execute the touch display method described above. In this embodiment, since the touch display chip 1104 has a predetermined timing relationship between sending the transmission enable signal and receiving the downlink signal, the timing relationship is already stored in the application processor 1102 in advance. Accordingly, when the application processor 1102 receives the transmission enable signal, the first target period can be determined according to the stored timing relationship and the transceiving time information of the transmission enable signal. That is, the application processor 1102 may determine a period of time that the touch display chip 1104 would be occupied to receive a downstream signal. Accordingly, the application processor 1102 may select the unoccupied second target period to send the display data signal to the touch display chip 1104, so as to avoid overlapping of time when the touch display chip 1104 receives and sends the signal, that is, avoid the problem of collision between the touch display chip 1104 receives and sends the signal, and further effectively inhibit the influence of the signal timing collision on the touch effect.
Further, the touch display device further comprises a touch display screen. The touch display screen can be an In-cell structure touch display screen, wherein In-cell refers to a method for embedding a touch function into the display screen, and the In-cell structure touch display screen is beneficial to realizing the thinning and the light weight of the touch display device. Under the current technical level, only the liquid crystal screen realizes the touch display screen of the In-cell architecture which can be produced In mass, and particularly, the Vcom electrode of the liquid crystal screen is multiplexed to serve as a sensing electrode of the touch function to realize the embedding of the touch function. It can be understood that some OLED display screens currently realize the embedding of the touch function by multiplexing ELVSS electrodes as sensing electrodes of the touch function. Therefore, the present embodiment does not limit the type of touch display screen.
With continued reference to fig. 11, in one embodiment, the application processor 1102 is configured with a first MIPI interface and a first GPIO interface and the touch display chip 1104 is configured with a second MIPI interface and a second GPIO interface. The second MIPI interface is connected with the first MIPI interface to transmit display data signals, and the second GPIO interface is connected with the first GPIO interface to transmit transmission enabling signals.
With continued reference to fig. 11, in one embodiment, the touch display chip 1104 is further connected to the application processor 1102 through a serial peripheral interface (SERIAL PERIPHERAL INTERFACE, SPI) or a two-wire serial bus (Inter-INTEGRATED CIRCUIT, IIC), that is, the cathode voltage value determined by the touch display chip 1104 can be transmitted to the application processor 1102 through the SPI or IIC interface, so that the application processor 1102 adjusts the cathode voltage signal of the touch display chip 1104, thereby ensuring the accuracy of the voltage value of the cathode voltage signal, and further ensuring the accuracy of the display brightness of the touch display screen.
The embodiment of the application also provides a touch display system, which comprises the touch display device and the active pen, wherein the active pen is used for responding to the uplink signal sent by the touch display device and sending the downlink signal to the touch display device in the first target period. Based on the touch display device, the embodiment can avoid the time sequence conflict of the uplink signals related to the active pen, thereby ensuring the stability of the communication process of the active pen. Moreover, since no time sequence conflict occurs, the application processor can randomly adjust the display frame rate according to the display requirement, thereby improving the display flexibility. Therefore, the embodiment provides a touch display system with stable writing process and more flexible display.
Based on the same inventive concept, the embodiment of the application also provides a touch display device for realizing the touch display method. The implementation of the solution provided by the device is similar to the implementation described in the above method, so the specific limitation in one or more embodiments of the touch display device provided below may refer to the limitation of the touch display method hereinabove, and will not be repeated herein.
Fig. 12 is one of the block diagrams of the touch display device according to an embodiment, referring to fig. 12, in one embodiment, the touch display device includes a transmission enable signal receiving module 1202, a first period determining module 1204, and a second period determining module 1206. The transmission enabling signal receiving module 1202 is configured to receive a transmission enabling signal sent by the touch display chip. The first period determining module 1204 is configured to determine, according to the transmission enable signal, a first target period in which the touch display chip receives the downlink signal sent by the active pen, where the transmission enable signal and the downlink signal have a preset timing relationship. The second period determining module 1206 is configured to determine a second target period according to the first target period, so as to send the display data signal to the touch display chip in the second target period, where the second target period is staggered from the first target period.
In one embodiment, the touch display device further includes a data to be displayed generating module, where the data to be displayed generating module is configured to obtain a plurality of layers to be displayed of a frame of image; performing layer stacking processing and enhancement processing on a plurality of layers to be displayed to obtain data to be displayed of a frame of image to be displayed, and caching the data to be displayed; and generating and sending a display data signal to the touch display chip according to the cached data to be displayed in the second target period.
Fig. 13 is a second block diagram of a touch display device according to an embodiment, referring to fig. 13, in one embodiment, the touch display device includes an uplink signal sending module 1302 and a transmission enabling signal sending module 1304. The uplink signal sending module 1302 is configured to send an uplink signal to the active pen if the touch display chip and the active pen are in a connection state, so as to instruct the active pen to send a downlink signal to the touch display chip in a first target period. The transmission enabling signal transmitting module 1304 is configured to transmit a transmission enabling signal to the application processor, so as to instruct the application processor to transmit the display data signal to the touch display chip in a second target period, where the second target period is staggered from the first target period.
The above-mentioned various modules in the touch display device may be implemented in whole or in part by software, hardware, and combinations thereof. The above modules can be embedded in or independent of a processor in the touch display device in a hardware form, or can be stored in a memory in the touch display device in a software form, so that the processor can call and execute operations corresponding to the above modules.
In one embodiment, a touch display device is provided, which may be a terminal, and an internal structure thereof may be as shown in fig. 14. The touch display device includes a processor, a memory, an input/output interface, a communication interface, a display unit, and an input device. The processor, the memory and the input/output interface are connected through a system bus, and the communication interface, the display unit and the input device are connected to the system bus through the input/output interface. The processor of the touch display device is used for providing computing and control capabilities. The memory of the touch display device includes a non-volatile storage medium and an internal memory. The non-volatile storage medium stores an operating system and a computer program. The internal memory provides an environment for the operation of the operating system and computer programs in the non-volatile storage media. The input/output interface of the touch display device is used for exchanging information between the processor and the external device. The communication interface of the touch display device is used for conducting wired or wireless communication with an external terminal, and the wireless communication can be realized through WIFI, a mobile cellular network, NFC (near field communication) or other technologies. The computer program, when executed by a processor, implements a touch display method. The display unit of the touch display device is used for forming a visual picture, and can be a display screen, a projection device or a virtual reality imaging device. The display screen can be a liquid crystal display screen or an electronic ink display screen, and the input device of the touch display device can be a touch layer covered on the display screen, can also be keys, a track ball or a touch pad arranged on the shell of the touch display device, and can also be an external keyboard, a touch pad or a mouse and the like.
It will be appreciated by those skilled in the art that the structure shown in fig. 14 is merely a block diagram of a portion of the structure associated with the present inventive arrangements and is not limiting of the touch display device to which the present inventive arrangements are applied, and that a particular touch display device may include more or fewer components than shown, or may combine certain components, or have a different arrangement of components.
In one embodiment, a touch display device is provided, including a memory and a processor, where the memory stores a computer program, and the processor implements the steps in the method embodiments described above when executing the computer program.
In one embodiment, a computer program product is provided, comprising a computer program which, when executed by a processor, implements the steps of the method embodiments described above.
Those skilled in the art will appreciate that implementing all or part of the above described methods may be accomplished by way of a computer program stored on a non-transitory computer readable storage medium, which when executed, may comprise the steps of the embodiments of the methods described above. Any reference to memory, database, or other medium used in embodiments provided herein may include at least one of non-volatile and volatile memory. The nonvolatile Memory may include Read-Only Memory (ROM), magnetic tape, floppy disk, flash Memory, optical Memory, high density embedded nonvolatile Memory, resistive random access Memory (ReRAM), magneto-resistive random access Memory (Magnetoresistive Random Access Memory, MRAM), ferroelectric Memory (Ferroelectric Random Access Memory, FRAM), phase change Memory (PHASE CHANGE Memory, PCM), graphene Memory, and the like. Volatile memory can include random access memory (Random Access Memory, RAM) or external cache memory, and the like. By way of illustration, and not limitation, RAM can be in various forms such as static random access memory (Static Random Access Memory, SRAM) or dynamic random access memory (Dynamic Random Access Memory, DRAM), etc. The databases referred to in the embodiments provided herein may include at least one of a relational database and a non-relational database. The non-relational database may include, but is not limited to, a blockchain-based distributed database, and the like. The processor referred to in the embodiments provided in the present application may be a general-purpose processor, a central processing unit, a graphics processor, a digital signal processor, a programmable logic unit, a data processing logic unit based on quantum computing, or the like, but is not limited thereto.
The technical features of the above embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.
The foregoing examples illustrate only a few embodiments of the application and are described in detail herein without thereby limiting the scope of the application. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the application, which are all within the scope of the application. Accordingly, the scope of the application should be assessed as that of the appended claims.
Claims (14)
1. The touch display method is characterized by being applied to an application processor, and comprises the following steps:
Receiving a transmission enabling signal sent by a touch display chip;
Determining a first target period of time for the touch display chip to receive a downlink signal sent by an active pen according to the transmission enabling signal, wherein the transmission enabling signal and the downlink signal have a preset time sequence relationship;
And determining a second target period according to the first target period so as to send a display data signal to the touch display chip in the second target period, wherein the second target period is staggered with the first target period.
2. The touch display method according to claim 1, wherein the determining, according to the transmission enable signal, the first target period for the touch display chip to receive the downlink signal includes:
acquiring sending time information of a corresponding uplink signal carried by the transmission enabling signal, wherein the uplink signal is a signal sent to an active pen by the touch display chip;
and determining a first target period of time for the touch display chip to receive a downlink signal according to the sending time information and a preset downlink signal interval, wherein the downlink signal interval is a time interval between the sending of the uplink signal by the touch display chip and the receiving of the downlink signal.
3. The touch display method according to claim 1, wherein the determining a second target period for transmitting a display data signal according to the first target period includes:
determining a first starting time of sending the display data signal corresponding to one frame of image according to the display frame rate;
determining the number of periods of the second target period required to transmit one frame of image according to the first data amount of one frame of image and the second data amount of the second target period for transmitting the display data signal;
And determining a second starting time corresponding to each second target period for transmitting all display data signals of one frame of image according to the first starting time and the period number.
4. A touch display method according to any one of claims 1 to 3, further comprising:
acquiring a plurality of layers to be displayed of a frame of image;
Performing layer stacking processing and enhancement processing on the plurality of layers to be displayed to obtain data to be displayed of a frame of image to be displayed, and caching the data to be displayed;
and generating and sending the display data signal to the touch display chip according to the cached data to be displayed in the second target period.
5. The touch display method is characterized by being applied to a touch display chip, and comprises the following steps:
If the touch display chip and the active pen are in a connection state, an uplink signal is sent to the active pen so as to instruct the active pen which receives the uplink signal to send a downlink signal to the touch display chip in a first target period;
And sending a transmission enabling signal to an application processor so as to instruct the application processor to send a display data signal to the touch display chip in a second target period, wherein the second target period is staggered with the first target period.
6. The touch display method of claim 5, wherein the sending a transmission enable signal to an application processor comprises:
and generating and transmitting the transmission enabling signal carrying the sending time information of the uplink signal to an application processor.
7. The touch display method according to claim 6, wherein the uplink signal and the transmission enable signal are transmitted simultaneously so that transmission time information of the uplink signal and the transmission enable signal is the same.
8. A touch display device, comprising:
an application processor for performing the touch display method according to any one of claims 1 to 4;
A touch display chip connected to the application processor for executing the touch display method according to any one of claims 5 to 7.
9. The touch display device of claim 8, wherein the application processor is configured with a first MIPI interface and a first GPIO interface, and the touch display chip is configured with a second MIPI interface and a second GPIO interface;
The second MIPI interface is connected to the first MIPI interface to transmit the display data signal, and the second GPIO interface is connected to the first GPIO interface to transmit the transmission enable signal.
10. A touch display system, comprising:
the touch display device of claim 8 or 9;
and the active pen is used for responding to the uplink signal sent by the touch display equipment and sending the downlink signal to the touch display equipment in a first target period.
11. A touch display device, comprising:
The transmission enabling signal receiving module is used for receiving the transmission enabling signal sent by the touch display chip;
A first period determining module, configured to determine, according to the transmission enabling signal, a first target period during which the touch display chip receives a downlink signal sent by an active pen, where the transmission enabling signal and the downlink signal have a preset timing relationship;
And the second time period determining module is used for determining a second target time period according to the first target time period so as to send a display data signal to the touch display chip in the second target time period, wherein the second target time period is staggered with the first target time period.
12. A touch display device, comprising:
the uplink signal sending module is used for sending an uplink signal to the active pen if the touch display chip is in a connection state with the active pen, so as to instruct the active pen which receives the uplink signal to send a downlink signal to the touch display chip in a first target period;
and the transmission enabling signal sending module is used for sending a transmission enabling signal to the application processor so as to instruct the application processor to send a display data signal to the touch display chip in a second target period, wherein the second target period is staggered with the first target period.
13. A computer readable storage medium, on which a computer program is stored, characterized in that the computer program, when being executed by a processor, implements the steps of the method of any of claims 1 to 7.
14. A computer program product comprising a computer program, characterized in that the computer program, when being executed by a processor, implements the steps of the method of any of claims 1 to 7.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211648714.4A CN118226977A (en) | 2022-12-21 | 2022-12-21 | Touch display method, device, equipment, system and readable storage medium |
| PCT/CN2023/126932 WO2024131274A1 (en) | 2022-12-21 | 2023-10-26 | Touch display method, apparatus, and device, system, and readable storage medium |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202211648714.4A CN118226977A (en) | 2022-12-21 | 2022-12-21 | Touch display method, device, equipment, system and readable storage medium |
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| CN118226977A true CN118226977A (en) | 2024-06-21 |
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| JP7182417B2 (en) * | 2018-07-31 | 2022-12-02 | 株式会社ワコム | Active stylus detection method |
| CN111930268B (en) * | 2020-09-18 | 2021-01-22 | 深圳市汇顶科技股份有限公司 | Touch control chip, code printing method and electronic equipment |
| CN112558797B (en) * | 2021-02-19 | 2021-07-06 | 深圳市千分一智能技术有限公司 | Active pen, control method and device thereof, and computer-readable storage medium |
| CN114816128A (en) * | 2022-05-30 | 2022-07-29 | 武汉华星光电半导体显示技术有限公司 | Display device and driving method thereof, active pen |
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