WO2018120546A1

WO2018120546A1 - Image display method and terminal device

Info

Publication number: WO2018120546A1
Application number: PCT/CN2017/082240
Authority: WO
Inventors: 陈磊
Original assignee: 华为技术有限公司
Priority date: 2016-12-30
Filing date: 2017-04-27
Publication date: 2018-07-05
Also published as: CN113225427B; CN108476306A; CN113225427A; CN108476306B

Abstract

An image display method and a terminal device, used for solving the problem in the prior art of poor display effects when displaying images of third party applications not using SDK on existing electronic ink screens. The method comprises: determining the sending time of a received second frame image, the sending time being the time that the second frame image is sent to the next processing module after the application layer finishes rendering the second frame image; determining the difference between the sending time of the second frame image and the sending time of a previously received first frame image; and, if determining that the difference is greater than or equal to a preset threshold, then sending the second frame image to a display buffer register.

Description

Image display method and terminal device

This application claims the priority of the Chinese Patent Application filed on Dec. 30, 2016, the Chinese Patent Application No. 201611265369.0, entitled "A Method and Apparatus for Displaying a Double-Sided Screen Mobile Phone Application", the entire contents of which are hereby incorporated by reference. The citations are incorporated herein by reference.

Technical field

The present application relates to the field of terminal technologies, and in particular, to a method for displaying an image and a terminal device.

Background technique

With the advancement of technology, smartphones have evolved from a front-facing single screen that supports display and touch control to both front and back dual screens, and the back screen of the smartphone can also be displayed and touch controlled. At present, the front of the smartphone uses an LCD screen. The back of the smartphone uses an E Ink screen with low power consumption and high visibility compared to the LCD screen. This E Ink screen uses the latest Carta panel. Technology, easy to read under the sun, and no flicker, no radiation, large viewing angle, greatly reducing the fatigue of the eyes, more and more people are favored. The latest E Ink screen fully supports touch operation, supports multi-finger touch, and supports various gestures. The increase in touch characteristics makes the E Ink screen have a wider application. The latest E Ink screen can fully display the interface of the entire Android system, but since the refresh rate of the electronic ink screen is 2 to 8 Hz, and the refresh rate of the front LCD screen is 60 Hz or higher, the animation normally displayed on the front LCD screen The effect is that the animation frame with several frames split on the back E Ink screen has a great delay and the user experience is poor. In order to make full use of the E Ink screen, the third-party application used on the front LCD screen must use a specific The software development kit (SDK) provided by the manufacturer can be used normally on the back E Ink screen, which is really beneficial for uniformity and usability, but it also makes this E Ink The scope of application of the screen is greatly reduced.

In summary, how to make the back E Ink screen support the display effect of the image of the third-party application without the SDK has good applicability and improve the user experience, which is a problem that needs to be solved at present.

Summary of the invention

The embodiment of the present invention provides a method for displaying an image and a terminal device for solving the problem that the electronic ink screen existing in the prior art has a poor display effect when displaying an image of a third-party application that does not use the SDK.

In a first aspect, the present application provides a method for displaying an image, the method comprising: determining a sending time of a received second frame image, where the sending time is after the application layer draws the second frame image, Determining a time when the second frame image is sent to the next processing module, and then determining a difference between a transmission time of the second frame image and a transmission time of the previously received first frame image; if it is determined that the difference is greater than or Equal to the set threshold value, the second frame image is sent to the display buffer register, and the image stored in the display buffer register is acquired according to the actual vertical synchronization clock signal, and sent to the electronic ink screen for display in the storage order.

In the embodiment of the present application, a method for displaying an image is provided. When the difference between the sending time of the second frame image and the sending time of the first frame image is greater than or equal to the set threshold, the second The frame image is sent to the display buffer register for display on the electronic ink screen, and the difference can be made smaller than the set threshold by the above image display method. The image of the multi-frame animation effect continuously sent is filtered out, and only the image whose difference is greater than or equal to the set threshold value is displayed, so as to ensure that the electronic ink screen is like a stable static picture, thereby improving the user's use. Experience.

In one possible design, the method further includes:

If it is determined that the difference is less than a set threshold, the second frame image is discarded.

In a possible design, after the second frame image is sent to the display buffer register, the method further includes:

Receiving a touch instruction; drawing a setting image triggered by the touch instruction; performing layer superposition processing on the set image triggered by the touch instruction and the second frame image in the display buffer register.

In the embodiment of the present application, when the electronic ink screen receives the touch instruction, the user needs to display the positive feedback information, but the time of the real-time feedback may be lower than the time displayed by the ink screen in one frame, so the setting triggered by the drawing of the touch instruction is adopted. And setting an image, superimposing the set image triggered by the touch instruction with the second frame image in the display buffer register, so that the user obtains positive feedback information, determining that the touch command issued by the user has taken effect, and improving the user The experience of using.

In a possible design, the step of superimposing the set image triggered by the touch instruction with the second frame image in the display buffer register includes:

The set image triggered by the touch instruction is overwritten on the second frame image in the display buffer register.

In a possible design, after performing the layer superposition processing on the set image triggered by the touch instruction and the second frame image in the display buffer register, the method further includes:

Transmitting the obtained image after the superimposition processing to the electronic ink screen, and refreshing a designated area on the electronic ink screen, wherein the designated area is a set image triggered by the touch instruction in the electronic The display area on the ink screen.

In the embodiment of the present application, refreshing the designated area on the electronic ink screen instead of full-screen refreshing can speed up display efficiency and improve display speed.

In a second aspect, the present application provides an image display terminal device, where the terminal device includes: a first determining module, configured to determine a sending time of the received second frame image, where the sending time is completed by the application layer After the second frame image is sent, the second frame image is sent to the time of the next processing module; the second determining module is configured to determine the sending time of the second frame image and the previously received first frame image. And a processing module, configured to send the second frame image to the display buffer register if it is determined that the difference is greater than or equal to the set threshold.

In a possible design, the terminal device further includes:

And a display module, configured to acquire an image stored in the display buffer register according to an actual vertical synchronous clock signal, and send the image to the electronic ink screen for display in a storage order.

In a possible design, the terminal device further includes:

a receiving module, configured to receive a touch instruction;

a generating module, configured to draw a setting image triggered by the touch instruction;

The processing module is further configured to perform a layer superposition process on the set image triggered by the touch instruction and the second frame image in the display buffer register.

In one possible design, the processing module is specifically configured to:

In a possible design, the display module is further configured to:

Transmitting the obtained image after the superimposition processing to the electronic ink screen, and refreshing a designated area on the electronic ink screen, wherein the designated area is a set image triggered by the touch instruction in the electronic On the ink screen Show area.

In a third aspect, the embodiment of the present application further provides an image display terminal device, where the terminal includes a processor and a memory, the memory is used to store a software program, and the processor is configured to read software stored in the memory. The program and the method of any one of the possible aspects of the first aspect or the first aspect described above are implemented. The electronic device can be a mobile terminal, a computer, or the like.

In one possible design, the processor is further configured to:

The images stored in the display buffer register are acquired according to the actual vertical synchronous clock signal, and are sent to the electronic ink screen for display in the order of storage.

In one possible design, the processor is further configured to:

Receiving a touch command, and drawing a setting image triggered by the touch instruction, the processing module is further configured to: perform setting image triggered by the touch instruction with the second frame image in the display buffer register Layer overlay processing.

In one possible design, the processor is specifically configured to:

In one possible design, the processor is further configured to:

In a fourth aspect, the embodiment of the present application further provides a computer storage medium, where the software program stores a software program, where the software program can implement the first aspect or the first one when being read and executed by one or more processors Any of the possible ways of designing aspects provided.

DRAWINGS

FIG. 1 is a flowchart of a method for displaying an image on an LCD screen according to an embodiment of the present application;

2 is a flowchart of combining different screen layer superposition processing according to an embodiment of the present application;

3 is a flowchart of a method for displaying an image on an electronic ink screen according to an embodiment of the present application;

4 is a flowchart of a method for displaying an image according to an embodiment of the present application;

FIG. 5 is a flowchart of another method for displaying an image according to an embodiment of the present application;

FIG. 6 is a schematic diagram of an instruction area according to an embodiment of the present application;

FIG. 7 is a flowchart of still another method for displaying an image according to an embodiment of the present application;

FIG. 8 is a schematic diagram of an apparatus for a terminal device according to an embodiment of the present disclosure;

FIG. 9 is a schematic structural diagram of hardware of a terminal device according to an embodiment of the present disclosure.

detailed description

In order to make the objects, technical solutions and advantages of the present application more clear, the present application will be further described in detail below with reference to the accompanying drawings.

The embodiment of the present invention provides a method for displaying an image and a terminal device for solving the problem that the electronic ink screen existing in the prior art has a poor display effect when displaying an image of a third-party application that does not use the SDK. Wherein, the method and the terminal device are based on the same inventive concept, and the method is similar to the method for solving the problem by the terminal device, so the terminal The implementation of the devices and methods can be referred to each other, and the repeated description will not be repeated.

In addition, in the description of the present application, a plurality of words refer to two or more words such as “first” and “second”, which are only used to distinguish the purpose of description, and are not to be understood as indicating or suggesting that they are relatively important. Sex, can not be understood as an indication or suggestion order.

The "terminal device" involved in the present invention is a device that has a built-in display system and can realize a human-computer interaction function, and the terminal device can be a computer, a mobile phone, a tablet computer, a point of sales (POS), or a vehicle-mounted computer. In this application, only a mobile phone is taken as an example.

A layer, composed of many pixels, is the basic unit that makes up an image. A frame of image can be a layer, and it is also composed of multiple layers stacked up and down. A layer is like a film containing elements such as text or graphics. The sheets are stacked one on another and combined to form the final result of the image.

The frame rate is usually the number of frames of the displayed image in one second. In the embodiment of the present invention, the frame rate = 1 second/Vertical Synchronization (Vsync) period.

The front-side liquid crystal display (LCD) screen or the organic light-emitting diode (OLED) OLED screen of the existing double-sided smart phone, the front liquid crystal screen or the OLED screen has a refresh rate of 60 Hz or even higher. , higher than the 2Hz ~ 8Hz refresh rate of the back ELINK screen, the third-party application based on the front LCD refresh rate design animation effect, if displayed on the back ELINK screen, will lead to great delay, third-party application animation The effect of the display on the back ELINK screen is poor, and the embodiment of the present invention solves the above problems. Next, firstly, the flow of displaying the image according to the vsync clock signal on the front liquid crystal screen is first introduced. As shown in FIG. 1 , according to the vsync clock signal, the S101 application layer is firstly drawn, and then the S102 combination (Compose) different screen layer superposition is performed. Processing, and finally executing S103 on the front LCD screen display, wherein the process of composing different screen layer superposition processing is as shown in FIG. 2, and the processing of each frame image strictly depends on the vsync pulse clock signal as a synchronization signal source, keeping The different modules perform synchronization processing on the image. When the vsync pulse clock is X, the application layer is used to draw the first frame image. When the vsync pulse clock is X+1, the step S202Compse layer is superimposed on the first frame. Step S203 is performed to apply the second frame image; when the vsync pulse clock is X+2, step S204 is performed to display the first frame on the LCD screen, and step S205Compse layer is performed to superimpose the second frame, and step S206 is performed. The layer draws the third frame image; when the vsync pulse clock is X+3, step S207 is executed to display the second frame on the LCD screen, and the step is executed at the same time. Overlay S208Compse third frame, and so on.

For example, the frequency of the LCD screen is 60 Hz, and the frequency of the electronic ink screen is 4 Hz. If the 4 Hz vsync clock signal of the electronic ink screen is used as the synchronous signal source for display, the third-party application will follow the 4 Hz vsync clock signal. The frequency to draw the image. To draw an animation of 1S according to the frequency of the 60Hz vsync clock signal, it is necessary to draw 60 frames of images, and to draw the 60 frames of images according to the frequency of the 4Hz vsync clock signal, 15S is required, and the animation displayed on the LCD screen is displayed in 1S. It takes 15 seconds to display on the electronic ink screen, which presents a "slow motion" animation with a frame of jitter, resulting in a very poor user experience. In order to solve the above problem, an embodiment of the present invention provides a method for displaying an image. As shown in FIG. 3, a third-party application displays an image on an electronic ink screen, but sets a virtual vsync when the application layer draws an image in step S301. a clock signal, wherein the virtual vsync clock signal may be generated by the S302 virtual vsync clock signal generation module, causing the application layer to render an image according to a virtual vsync clock signal, the virtual vsync clock signal and the third party application on the LCD The refresh rate is the same when the image is drawn on the screen, step S303Compose different screen layer superimposition processing, step S304 selects the frame to be displayed according to the actual vsync clock signal of the electronic ink screen in the plurality of drawn images, and the electronic ink is performed in step S305. Displayed on the screen. This method can improve the user's experience when using the electronic ink screen, but there is a disadvantage in this method, that is, the selected final frame may not be displayed in time, and the effect of the displayed animation is relatively poor. For example, an animation with a duration of 800ms selects a frame according to the set duration. The set duration is 250ms. The electronic ink screen will display the image of the 250ms, 500ms, and 750ms, and then display the final static at 1000ms. The picture, while the duration of the animation is 800ms, so the final static picture display delay is large. When using the e-book application, the application displays an animated page flip effect on the LCD screen to the final display page when processing the page flip, but on the e-ink screen, an animation frame with several frames is split, and then the last frame There is also a delay in the static picture display, and the user's experience is poor. The lower the refresh rate of the electronic ink screen, the worse the user experience is. In the above case, the most ideal display effect should be that the intermediate process animation is not displayed, and the last frame of the static picture is displayed directly at the first time.

The method for displaying an image provided by the present application is specifically described below with reference to the accompanying drawings, so that when the electronic ink is used in the third-party application, the intermediate process animation is not displayed, and the last frame of the static image is directly displayed at the first time.

Referring to FIG. 4, a method for displaying an image provided by the present application includes:

S401. Determine a transmission time of the received second frame image, where the transmission time is a time when the application layer draws the second frame image and sends the second frame image to the next processing module.

S402. Determine a difference between a sending time of the second frame image and a sending time of the previously received first frame image.

S403. If it is determined that the difference is greater than or equal to a set threshold, send the second frame image to a display buffer register.

In a possible implementation manner, after the S402, the method further includes:

In a possible implementation manner, after the S403, the method further includes:

In the embodiment of the present application, a method for displaying an image is provided. When the difference between the sending time of the second frame image and the sending time of the first frame image is greater than or equal to the set threshold, the second The frame image is sent to the display buffer register for display on the electronic ink screen. By the above image display method, the image of the multi-frame animation effect whose difference value is continuously transmitted less than the set threshold value can be filtered out, and only the difference is displayed. An image larger than or equal to the set threshold value ensures that the electronic ink screen is like a stable static picture, thereby improving the user experience.

A method for displaying an image provided by the present application is specifically described below with reference to FIG. 5. In step S501, when a layer is drawn by an application layer, a virtual vsync clock signal is set, wherein the virtual vsync clock signal may be generated by the S502 virtual vsync clock signal. The module generates, then step S503 combines different screen layer superposition processing according to the virtual vsync clock signal, step S504 acquires the transmission time of the received second frame image, and step S505 compares the transmission time of the second frame image with Whether the difference of the first frame image transmission time received before is greater than or equal to the set threshold value, for example, 40 ms or more than 2 frames, then step S506 is performed to send the last frame image to the display buffer register, otherwise Step S507 is performed to discard the second frame image, and the image in the display buffer register is acquired according to the actual vsync clock signal, and step 508 is displayed on the electronic ink screen.

In a possible implementation, after the S403, if the operation of the user on the screen is received, the method further includes:

Receiving a touch instruction; drawing a setting image triggered by the touch instruction; and superimposing the setting image triggered by the touch instruction with the second frame image in the display buffer register. Wherein the touch instruction is The superimposing process of the triggered setting image and the second frame image in the display buffer register specifically includes: overwriting the setting of the touch instruction trigger on the second frame image in the display buffer register image.

In a possible implementation, after performing the layer superposition processing on the set image triggered by the touch instruction and the second frame image in the display buffer register, the method further includes:

Specifically, the image obtained by the superimposition processing is sent to the electronic ink screen by a module of Compose superposition processing of an application layer.

Specifically, different touch commands trigger different setting images, as shown in FIG. 6 , which are setting images corresponding to the click touch command and the sliding touch command, respectively, wherein the set image can be displayed on the electronic ink screen. One frame is then disappeared, which is not limited by the present invention. When the setting image triggered by the touch command is superimposed with the second frame image in the display buffer register, the first line determines the original color of the user's click position, although the electronic ink screen has only two colors of black and white. However, the color gradation is read, and the original color information of the designated area centered on the click position is read. If it is judged that the original color displayed in the designated area is a light color, the designated area after the click is displayed as a dark color; The original color is dark tone, then the specified area after clicking is displayed as a light color; the specified area is refreshed on the electronic ink screen, and the full screen of the electronic ink screen is not refreshed, the display rate can be accelerated, and the real-time display can be improved. User experience.

For example, as shown in FIG. 7 , when the application layer draws an image in step S701, a virtual vsync clock signal is set, wherein the virtual vsync clock signal may be generated by the S702 virtual vsync clock signal generation module, and then step S703 is performed according to the virtual The vsync clock signal Compose different screen layer superimposition processing, step S704 acquires the transmission time of the currently received second frame image, and step S705 compares the transmission time of the second frame image with the previously received first frame image transmission time. Whether the difference is greater than or equal to the set threshold, if yes, executing step S706 to send the second frame image to the display buffer register, and if not, executing step 707 to discard the second frame image, step S708 When the electronic ink screen receives the touch instruction, the electronic ink screen draws the setting image triggered by the touch instruction in step S709, and the step S710 performs the Compose picture layer superposition processing on the set image and the image acquired from the display buffer register. Step S711, sending the superimposed processed image to the electronic ink screen for display, where the Reflect on ink screen refresh operation for the designated area.

Based on the same inventive concept as the method embodiment, the present application further provides a schematic diagram of a terminal device. As shown in FIG. 8, the terminal device includes:

The first determining module 801 is configured to determine a sending time of the received second frame image, where the sending time is after the application layer draws the second frame image, and sends the second frame image to the next processing module. Moment.

The second determining module 802 is configured to determine a difference between a sending time of the second frame image and a sending time of the previously received first frame image.

The processing module 803 is configured to send the second frame image to the display buffer register if it is determined that the difference is greater than or equal to the set threshold.

In a possible implementation, the terminal device further includes:

In the embodiment of the present application, a terminal device is provided, where the sending time of the second frame image and the sending of the first frame image When the difference of the sending time is greater than or equal to the set threshold value, the second frame image is sent to the display buffer register for display on the electronic ink screen, and the difference can be set smaller than the above image display method. The image of the multi-frame animation effect continuously sent by the fixed threshold value is filtered out, and only the image whose difference value is greater than or equal to the set threshold value is displayed, so that the electronic ink screen is like a stable static picture. Improve the user experience.

In a possible implementation manner, the terminal device further includes:

a receiving module, configured to receive a touch instruction;

In a possible implementation manner, the processing module is specifically configured to:

In a possible implementation manner, the display module is further configured to:

The division of the modules in the embodiment of the present application is schematic, and is only a logical function division. In actual implementation, there may be another division manner. In addition, each functional module in each embodiment of the present application may be integrated into one processing. In the device, it can also be physically existed alone, or two or more modules can be integrated into one module. The above integrated modules can be implemented in the form of hardware or in the form of software functional modules.

When the integrated module can be implemented in the form of hardware, as shown in FIG. 9, the terminal device can include the processor 901. The hardware of the entity corresponding to the above module may be the processor 901. The processor 901 can be a central processing unit (English: central processing unit, CPU for short), or a digital processing module or the like. The terminal device further includes a memory 902 for storing a program executed by the processor 901. The memory 902 can be a non-volatile memory, such as a hard disk drive (HDD) or a solid state drive (SSD), or a volatile memory (English: volatile) Memory), such as random access memory (English: random-access memory, abbreviation: RAM). Memory 902 is any other medium that can be used to carry or store desired program code in the form of instructions or data structures and that can be accessed by a computer, but is not limited thereto.

The processor 901 is configured to execute the program code stored in the memory 902, specifically invoke the program instruction stored in the first memory, and determine a transmission time of the received second frame image, where the sending time is the application layer After the two frames of images, the time at which the second frame image is sent to the next processing module determines the difference between the transmission time of the second frame image and the transmission time of the previously received first frame image, if it is determined The difference is greater than or equal to the set threshold value, and the second frame image is sent to the display buffer register.

The specific connection medium between the processor 901 and the memory 902 is not limited in the embodiment of the present application. The embodiment of the present application is connected between the processor 901 and the memory 902 in FIG. 9 through a bus 903. The bus is indicated by a thick line in FIG. 9. The connection manner between other components is only for illustrative description, and is not cited. Limited. The bus can be divided into an address bus, a data bus, a control bus, and the like. For ease of representation, only one thick line is shown in Figure 9, but it does not mean that there is only one bus or one type of bus.

Those skilled in the art will appreciate that embodiments of the present application can be provided as a method, system, or computer program product. Therefore, the present application may employ an entirely hardware embodiment, an entirely software embodiment, or a combination of software and hardware aspects. The form of the embodiment. Moreover, the application can take the form of a computer program product embodied on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) including computer usable program code.

The present application is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (system), and computer program products according to embodiments of the present application. It will be understood that each flow and/or block of the flowchart illustrations and/or FIG. These computer program instructions can be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing device to produce a machine for the execution of instructions for execution by a processor of a computer or other programmable data processing device. Means for implementing the functions specified in one or more of the flow or in a block or blocks of the flow chart.

The computer program instructions can also be stored in a computer readable memory that can direct a computer or other programmable data processing device to operate in a particular manner, such that the instructions stored in the computer readable memory produce an article of manufacture comprising the instruction device. The apparatus implements the functions specified in one or more blocks of a flow or a flow and/or block diagram of the flowchart.

These computer program instructions can also be loaded onto a computer or other programmable data processing device such that a series of operational steps are performed on a computer or other programmable device to produce computer-implemented processing for execution on a computer or other programmable device. The instructions provide steps for implementing the functions specified in one or more of the flow or in a block or blocks of a flow diagram.

It is apparent that those skilled in the art can make various changes and modifications to the embodiments of the present application without departing from the spirit and scope of the embodiments of the present application. Thus, it is intended that the present invention cover the modifications and variations of the embodiments of the present invention.

Claims

A method of image display, characterized in that the method comprises:

Determining a transmission time of the received second frame image, where the transmission time is a time after the application layer draws the second frame image, and sends the second frame image to the next processing module;

Determining a difference between a transmission time of the second frame image and a transmission time of the previously received first frame image;

If it is determined that the difference is greater than or equal to the set threshold, the second frame image is sent to the display buffer register.
The method of claim 1, wherein after the second frame image is sent to the display buffer register, the method further comprises:

The images stored in the display buffer register are acquired according to the actual vertical synchronous clock signal, and are sent to the electronic ink screen for display in the order of storage.
The method of claim 1, wherein after the second frame image is sent to the display buffer register, the method further comprises:

Receiving a touch command;

Draw a setting image triggered by the touch instruction;

And performing layer overlay processing on the set image triggered by the touch instruction and the second frame image in the display buffer register.
The method of claim 3, wherein the performing the layer superimposition processing on the set image triggered by the touch instruction and the second frame image in the display buffer register comprises:

The set image triggered by the touch instruction is overwritten on the second frame image in the display buffer register.
The method of claim 3, after the step of superimposing the set image triggered by the touch command with the second frame image in the display buffer register, the method further comprises:

Transmitting the obtained image after the superimposition processing to the electronic ink screen, and refreshing a designated area on the electronic ink screen, wherein the designated area is a set image triggered by the touch instruction in the electronic The display area on the ink screen.
An image display terminal device, characterized in that the terminal device comprises:

a first determining module, configured to determine a sending time of the received second frame image, where the sending time is after the application layer draws the second frame image, and sends the second frame image to the next processing module time;

a second determining module, configured to determine a difference between a sending time of the second frame image and a sending time of the previously received first frame image;

The processing module is configured to send the second frame image to the display buffer register if it is determined that the difference is greater than or equal to the set threshold.
The terminal device according to claim 6, wherein the terminal device further comprises:

And a display module, configured to acquire an image stored in the display buffer register according to an actual vertical synchronous clock signal, and send the image to the electronic ink screen for display in a storage order.
The terminal device according to claim 6, wherein the terminal device further comprises:

a receiving module, configured to receive a touch instruction;

a generating module, configured to draw a setting image triggered by the touch instruction;

The processing module is further configured to: set a setting image triggered by the touch instruction and a location in the display buffer register Layer superposition processing is performed on the second frame image.
The terminal device according to claim 8, wherein the processing module is specifically configured to:

The set image triggered by the touch instruction is overwritten on the second frame image in the display buffer register.
The terminal device according to claim 8, wherein the display module is further configured to:

Transmitting the obtained image after the superimposition processing to the electronic ink screen, and refreshing a designated area on the electronic ink screen, wherein the designated area is a set image triggered by the touch instruction in the electronic The display area on the ink screen.
An image display terminal device, characterized in that the terminal device comprises:

Memory for memory program instructions;

a processor, configured to invoke a program instruction stored in the memory, to determine a transmission time of the received second frame image, where the sending time is after the application layer draws the second frame image, and the second frame is Determining, by the time when the image is sent to the next processing module, a difference between the sending time of the second frame image and the sending time of the previously received first frame image, and determining that the difference is greater than or equal to the set gate A limit value that sends the second frame image to a display buffer register.
The terminal device according to claim 11, wherein the processor is further configured to:

The images stored in the display buffer register are acquired according to the actual vertical synchronous clock signal, and are sent to the electronic ink screen for display in the order of storage.
The terminal device according to claim 11, wherein the processor is further configured to:

Receiving a touch command, and drawing a setting image triggered by the touch instruction, the processing module is further configured to: perform setting image triggered by the touch instruction with the second frame image in the display buffer register Layer overlay processing.
The terminal device according to claim 13, wherein the processor is specifically configured to:

The set image triggered by the touch instruction is overwritten on the second frame image in the display buffer register.
The terminal device according to claim 13, wherein the processor is further configured to:

Transmitting the obtained image after the superimposition processing to the electronic ink screen, and refreshing a designated area on the electronic ink screen, wherein the designated area is a set image triggered by the touch instruction in the electronic The display area on the ink screen.