Display method and display device

Abstract

Embodiments of the present application provide a display method and a display device. The display method is used in a display device comprising a display panel, a display driving chip and a microprocessor. The display method comprises: the display panel outputting a scanning completion signal after completing a scanning process of a first frame image; after receiving the scanning completion signal, the microprocessor or the display driving chip writes initial data of a second frame image provided by the microprocessor into the display driving chip, and outputs display data of the second frame image to the display panel according to the initial data; or, the display driving chip outputs display data of the second frame image to the display panel in response to the scanning completion signal, and the display data is generated according to the initial data provided by the microprocessor; wherein the second frame image is a next frame image of the first frame image. The present application can solve the problem of display tearing.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of display, in particular to a display method and a display device. BACKGROUND

[0002] Picture tearing refers to a phenomenon that a display displays two or more frames on the same picture. A display panel needs a long time to complete data writing, and after a display driving chip is ready, the display panel is not necessarily ready. If a tearing signal is activated again at this time, the display picture will be torn. SUMMARY

[0003] Embodiments of the present application provide a display method and a display device to solve the problem of picture tearing in the prior art.

[0004] In a first aspect, embodiments of the present application provide a display method, which is used in a display device including a display panel, a display driving chip and a microprocessor. The display method includes:

[0005] The display panel outputs a scanning completion signal after completing a scanning process of a first frame image;

[0006] The display driving chip writes initial data of a second frame image provided by the microprocessor and outputs display data of the second frame image to the display panel according to the initial data after the microprocessor or the display driving chip receives the scanning completion signal; or the display driving chip outputs the display data of the second frame image to the display panel in response to the scanning completion signal, and the display data is generated according to the initial data.

[0007] The second frame image is a next frame image of the first frame image.

[0008] In a second aspect, based on the same inventive concept, embodiments of the present application further provide a display device including a display panel, a display driving chip and a microprocessor. The display device includes:

[0009] The display panel is configured to output a scanning completion signal after completing a scanning process of a first frame image;

[0010] The display driving chip is configured to start writing initial data of a second frame image and output display data of the second frame image to the display panel according to the initial data after the microprocessor or the display driving chip receives the scanning completion signal; or the display driving chip outputs the display data of the second frame image to the display panel in response to the scanning completion signal, and the display data is generated according to the initial data; the second frame image is a next frame image of the first frame image.

[0011] In a third aspect, based on the same inventive concept, embodiments of the present application further provide a display device, which displays by using the display method provided in any of the embodiments of the present application.

[0012] The display method and the display device provided by the embodiment of the present application have the following beneficial effects: the display panel outputs a scanning completion signal after completing the scanning process of the first frame image, and the scanning completion signal is a feedback signal made by the display panel after completing the scanning process of the first frame image. After the display panel outputs the feedback signal of the scanning completion signal, the display driving chip writes the initial data of the second frame image provided by the microprocessor or outputs the display data of the second frame image to the display panel in response to the scanning completion signal. When the display panel needs to display the first frame image and the second frame image in sequence, the display panel outputs the scanning completion signal to actively feed back the scanning completion of the first frame image, and the time when the display driving chip outputs the display data of the second frame image to the display panel occurs after the display panel outputs the scanning completion signal, so that the display driving chip does not provide the display data of the next frame to the display panel before the current frame data writing process is completed, thereby ensuring the display integrity of the frame image and avoiding image tearing. BRIEF DESCRIPTION OF DRAWINGS

[0013] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or the prior art description. Obviously, the drawings in the following description are some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor.

[0014] Figure 1 It is a schematic diagram of a display method in the prior art;

[0015] Figure 2 It is a flow chart of a display method provided by the embodiment of the present application;

[0016] Figure 3 It is another flow chart of a display method provided by the embodiment of the present application;

[0017] Figure 4 It is an interaction schematic diagram of each structure in a display device provided by the embodiment of the present application;

[0018] Figure 5 It is a signal timing diagram provided by the embodiment of the present application;

[0019] Figure 6 It is another flow chart of a display method provided by the embodiment of the present application;

[0020] Figure 7 It is another interaction schematic diagram of each structure in a display device provided by the embodiment of the present application;

[0021] Figure 8Another signal timing diagram provided for the embodiment of the present application;

[0022] Figure 9 Another display device schematic diagram provided for the embodiment of the present application;

[0023] Figure 10 Another display device schematic diagram provided for the embodiment of the present application;

[0024] Figure 11 A display device schematic diagram provided for the embodiment of the present application;

[0025] Figure 12 Another display device schematic diagram provided for the embodiment of the present application;

[0026] Figure 13 A conversion module schematic diagram provided for the embodiment of the present application;

[0027] Figure 14 Another display device schematic diagram provided for the embodiment of the present application;

[0028] Figure 15 A display device schematic diagram provided for the embodiment of the present application. DETAILED DESCRIPTION

[0029] In order to make the purpose, technical scheme and advantages of the embodiments of the present application clearer, the technical scheme in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are some of the embodiments of the present application, but not all the embodiments of the present application. Based on the embodiments in the present application, all the other embodiments obtained by those of ordinary skill in the art without creative work fall within the scope of protection of the present application.

[0030] The terms used in the embodiments of the present application are merely for the purpose of describing the specific embodiments, and are not intended to limit the present application. The singular forms "a", "an" and "the" used in the embodiments of the present application and the appended claims are also intended to include the plural forms, unless the context clearly indicates otherwise.

[0031] Figure 1 A display method schematic diagram in the prior art. As shown in FIG. 1, the display method in the prior art includes the following steps: Figure 1As shown, in the conventional display scheme, the tear signal is delivered to the microprocessor 02 by the display driving chip 01, and when the microprocessor 02 receives the active edge of the tear signal TE, i.e., the tear signal TE in the active state, then stage A is performed: the microprocessor 02 starts to write data to the random access memory of the display driving chip 01. After the corresponding data is written, stage B is performed: the display driving chip 01 starts to write the corresponding display data to the display panel 03. The signal in the random access memory needs to be kept stable during the process of writing the corresponding display data to the display panel 03, and this process is controlled by the tear signal TE. If the tear signal TE becomes active while the display driving chip 01 is still in the period of writing the display data to the display panel 03, then the data stored in the display driving chip 01 will be overwritten by the data of the next frame, and since the writing stage of the display data of the current frame has not been completed, the writing of the display data of the current frame will be affected, resulting in tearing of the picture. In the conventional design, the display driving chip 01 will send the tear signal TE in the active state to the microprocessor 02 at a preset frequency, and the display driving chip 01 itself cannot determine the end time of writing the display data to the display panel 03, so it is possible that the display driving chip 01 is still in the stage of writing the display data to the display panel 03, while the tear signal TE has been activated again, so that the microprocessor 02 writes data to the display driving chip 01 again, and the change of the data in the random access memory will cause the change of the display data, thereby causing tearing of the display picture.

[0032] To solve the problems in the prior art, the embodiment of the present application provides a display method. In the display method, a display panel outputs a scanning completion signal after completing the scanning process of a first frame of image. The scanning completion signal indicates that the display panel has completed the complete data writing process of the frame of image. After outputting the scanning completion signal, the display driving chip starts to output the display data of a second frame of image to the display panel, or the random access memory of the display driving chip starts to write the initial data of the second frame of image provided by the microprocessor. The first frame of image and the second frame of image are two consecutive frames of image. In the display method provided by the embodiment of the present application, the time when the display driving chip outputs the display data of the second frame of image to the display panel occurs after the display panel outputs the scanning completion signal, that is, the display driving chip will not output the display data of the next frame to the display panel before the display panel completes the data writing process of the current frame, thereby ensuring the display integrity of the frame of picture and avoiding tearing of the picture.

[0033] The embodiment of the present application provides a display method. The display method is used for a display device including a display panel, a display driving chip and a microprocessor. The display panel is coupled with the display driving chip, and the display driving chip is coupled with the microprocessor. Figure 2 A flow chart of the display method provided by the embodiment of the present application is shown in FIG. 2.Figure 2 As shown, the display method comprises:

[0034] Step S101: The display panel outputs a scanning completion signal after completing the scanning process of the first frame image. The display panel is provided with a plurality of rows of pixel circuits, and each row of pixel circuits is provided with a plurality of pixel circuits, and a plurality of sub-pixels are driven by each row of pixel circuits. Row gray scale data is written into each row of pixel circuits while scanning each row of pixel circuits, that is, the scanning period of each row of pixel circuits during display is matched with the period of writing row gray scale data into each row of pixel circuits, so as to realize the display of the sub-pixels driven by each row of pixel circuits. The plurality of rows of pixel circuits in the display panel are scanned row by row, and after the pixel circuits of all rows complete a scanning process, the scanning process of a frame image is completed. The display panel outputs a scanning completion signal after completing the scanning process of a frame image, and the scanning completion signal indicates that the display panel has completed the complete data writing process of a frame image. The scanning completion signal is a feedback signal made by the display panel after completing the scanning process of a frame image. After the display panel outputs the scanning completion signal, it indicates that the display panel is ready and can receive the display data of the next frame image.

[0035] Step S102: After receiving the scanning completion signal, the microprocessor or the display driving chip writes the initial data of the second frame image provided by the microprocessor, and outputs the display data of the second frame image to the display panel according to the initial data; or, the display driving chip outputs the display data of the second frame image to the display panel in response to the scanning completion signal, and the display data is generated according to the initial data provided by the microprocessor; wherein, the first frame image and the second frame image are two frame images that need to be displayed by the display panel in sequence, and the second frame image is the next frame image of the first frame image, that is, the display panel displays the second frame image after displaying the first frame image.

[0036] The display panel needs at least the following steps to complete the display of one frame of image: the microprocessor provides initial image data to the display driver chip; the display driver chip generates display data suitable for the display panel based on the initial image data; the display driver chip provides the display data to the display panel; and the display panel displays one frame of image based on the displayed data. The display driver chip includes a random access memory (RAM) with write and read functions. The RAM writes the initial data provided by the microprocessor and reads the initial data to generate the display data. Since the display panel needs a considerable amount of time to complete the data writing process, the time when the display driver chip completes outputting the display data to the display panel will be earlier than the time when the display panel finishes scanning one frame of image. In the prior art, the process of the display driver chip providing display data to the display panel is a one-way process; that is, the display panel only receives display data to display the image, and the display panel does not provide any feedback on the image display status.

[0037] This invention provides a display method in which a display panel outputs a scan completion signal after completing the scanning process of the first frame image. This scan completion signal is a feedback signal from the display panel indicating that it is ready to receive display data for the next frame image. Following the output of this feedback signal, the display driver chip writes initial data for the second frame image provided by the microprocessor or outputs display data for the second frame image to the display panel in response to the scan completion signal. When the display panel needs to display the first and second frames sequentially, the display panel outputs the scan completion signal to actively provide feedback on the completion status of the first frame image scan. Since the display driver chip outputs the display data for the second frame image after the scan completion signal, the display driver chip will not provide display data for the next frame to the display panel before the data writing process for the current frame is completed. This ensures the integrity of the frame display and avoids screen tearing.

[0038] In some embodiments, the display panel outputs a scanning completion signal to the microprocessor, and the microprocessor provides initial data of an image to the display driving chip in response to the scanning completion signal. After the microprocessor provides the initial data of the image to the display driving chip, the display driving chip can start to receive the initial data (or start to write the initial data). In this way, the time period for the display driving chip to output display data to the display panel can be separated from the time period for the display driving chip to write the initial data. In some other embodiments, the display panel outputs a scanning completion signal to the display driving chip, and the display driving chip starts to receive the initial data of the image written by the microprocessor in response to the scanning completion signal. In this way, the time period for the display driving chip to output display data to the display panel can be separated from the time period for the display driving chip to write the initial data. In some other embodiments, the display panel outputs a scanning completion signal to the display driving chip, and the display driving chip outputs display data of an image to the display panel in response to the scanning completion signal. In this way, the time period for the display driving chip to output display data of two consecutive images can not overlap, i.e., the display data of the next image is output after the display data of the current image is completed. The display method provided by the embodiments of the present application is described in detail below with specific examples.

[0039] In some embodiments, the display panel sends the output scanning completion signal to the microprocessor, and the microprocessor provides corresponding feedback after receiving the scanning completion signal. Figure 3 Another display method provided by the embodiments of the present application is shown in the flow chart of FIG. 3. Figure 3 As shown in FIG. 3, the display method comprises the following steps.

[0040] Step S201: The display panel receives display data of a first image provided by the display driving chip and performs a scanning process of the first image.

[0041] Step S202: The display panel outputs a scanning completion signal after completing the scanning process of the first image, and sends the scanning completion signal to the microprocessor.

[0042] Step S203: The microprocessor provides initial data of a second image to the display driving chip after receiving the scanning completion signal.

[0043] Step S204: The display driving chip writes the initial data of the second image provided by the microprocessor.

[0044] Step S205: The display driving chip outputs display data of the second image to the display panel according to the initial data of the second image.

[0045] Step S206: The display panel receives the display data of the second image and performs a scanning process of the second image.

[0046] The display method provided by the embodiment establishes communication between the display panel and the microprocessor, and the display panel provides a scanning completion signal of the first frame image to the microprocessor after completing the scanning process of the first frame image. The microprocessor provides initial data of the second frame image to the display driving chip after receiving the scanning completion signal. In other words, the scanning completion signal triggers the microprocessor to write the initial data of the image to the display driving chip. By using the display method provided by the embodiment, the time period of the display driving chip outputting display data of the image to the display panel is separated from the time period of the display driving chip writing the initial data of the next frame image in terms of time sequence. The time of the display driving chip writing the initial data of the image is in the front or back corridor of the scanning process. When the display driving chip outputs the display data to the display panel, the signals in the random access memory of the display driving chip can remain stable and not be covered by the initial data of the next frame image. Therefore, the display integrity of the frame image can be ensured, and the tearing problem of the image can be solved.

[0047] In some other embodiments, the display method further includes the step S200 of sending, by the display driving chip, a tearing signal in an active state to the microprocessor at a preset frequency. The preset frequency is related to the refresh frequency of the display image of the display panel. The tearing signal is a signal feedback made by the display driving chip to the microprocessor to inform the microprocessor of the state of the display driving chip.

[0048] The step S203 of providing, by the microprocessor, the initial data of the second frame image after receiving the scanning completion signal includes the step of providing, by the microprocessor, the initial data of the second frame image after receiving the tearing signal in the active state and the scanning completion signal.

[0049] Figure 4 An interaction schematic diagram of structures in a display device provided by the embodiment.

[0050] As Figure 4As shown, the display device comprises a display driving chip 10, a microprocessor 20 and a display panel 30. In this embodiment, stage ① is understood as a stage in which the microprocessor 20 provides initial data of an image to the display driving chip 10, and stage ② is understood as a stage in which the display driving chip 10 outputs display data of the image to the display panel 30. The display driving chip 10 provides the display data to the display panel 30 in stage ②, while the display driving chip 10 sends a tearing signal TE in an active state to the microprocessor 20 at a preset frequency. The display panel 30 receives the display data and performs an image scanning process according to the display data, and generates a scanning completion signal SD according to the completion of the scanning process and sends it to the microprocessor 20. After receiving the tearing signal TE in the active state and the scanning completion signal SD, the microprocessor 20 performs stage ①, that is, the tearing signal TE in the active state and the scanning completion signal SD jointly serve as a trigger signal triggering stage ①. Then the display driving chip 10 receives the initial data of the image provided by the microprocessor 20 in stage ① and buffers it, and when the display driving chip 10 needs to output display data to the display panel 30, the display driving chip 10 reads the buffered initial data and generates display data. The above process is repeated to complete the continuous display of multiple frames of images of the display panel.

[0051] Figure 5 A signal timing diagram is provided for the embodiment of the present application. Figure 5 The stages t1_1 and t2_1 in FIG. 1 correspond to stages required for the display panel to display a first frame of image, and the stages t1_2 and t2_2 correspond to stages required for the display panel to display a second frame of image. The process of the display method provided by the embodiment of the present application for continuously displaying the first frame of image and the second frame of image is understood in combination with Figure 4 and Figure 5

[0052] When the display panel 30 needs to display the first frame of image, the display driving chip 10 reads the initial data of the first frame of image stored therein to generate display data, and then provides the display data of the first frame of image to the display panel 30 in stage ②. Figure 5 The stage t2_1 in FIG. 1 is a time period in which the display driving chip 10 provides the display data of the first frame of image to the display panel 30. The end time of the stage t2_1 is the completion time of the display driving chip 10 outputting the display data. The display data provided by the display driving chip 10 comprises row scanning data and grayscale data, wherein the row scanning data comprises row scanning start data required by a shift driving circuit, denoted as STV, and the grayscale data is denoted as DATA, the grayscale data DATA comprises multiple groups of row grayscale data, and one group of row grayscale data corresponds to one row of pixel circuit. The row scanning data and the grayscale data cooperate to complete the scanning process of the frame of image. Figure 5 ​The active level of the row scanning start signal STV is low, and the period of outputting the gray scale data DATA is indicated by the thick horizontal line. The end of the outputting of the gray scale data DATA is the completion time of the display driving chip 10 outputting the display data. Figure 5 The high level of the tearing signal TE is the active state, and the low level is the inactive state. The tearing signal TE is activated by the display driving chip 10. Figure 5 It can be seen that the display driving chip 10 sends the tearing signal TE in the active state at a preset frequency, and the preset frequency is a pre-set value. The preset frequency of the tearing signal TE in the active state is related to the image refresh frequency of the display panel. Ideally, we expect the display driving chip to send the tearing signal TE in the active state after the end of the stage t2_1, but due to the change of the image refresh frequency, the speed of the display panel writing the display data is different from the speed of the display driving chip writing the initial data. And since the display driving chip 10 cannot monitor the end time of the stage t2_1, it cannot adjust the sending time of the TE signal in real time. Therefore, it will cause the tearing signal TE in the active state to be sent before the end of the stage t2_1. Figure 5 The end time of the stage t2_1 shown in the figure can be later than the rising edge of the tearing signal TE.

[0053] Figure 5 The low level is the scanning completion signal SD, and it can be seen that the display panel 30 starts to output the scanning completion signal SD in the low level later than the completion time of the display driving chip 10 outputting the display data. The display panel 30 outputs the scanning completion signal SD after completing the scanning process of the first frame image, and the display panel 30 completes the scanning process of the first frame image, that is, the display panel 30 completes the process of writing the display data. The display panel 30 sends the scanning completion signal SD to the microprocessor 20, and at this time, the microprocessor 20 has also received the tearing signal TE in the active state and the scanning completion signal SD. The tearing signal TE in the active state is a feedback made by the display driving chip 10 to the microprocessor 20, indicating that the display driving chip 10 is ready for the update of the initial data, and the scanning completion signal SD is a feedback made by the display panel 30 to the microprocessor 20, indicating that the display panel 30 is ready to receive the display data.

[0054] After receiving the tearing signal TE in the active state and the scanning completion signal SD, the microprocessor 20 performs stage ①, and the microprocessor 20 provides the initial data of the second frame image to the display driving chip 10, as shown in the figure. Figure 5 In the stage t1_2, the display driving chip 10 receives and stores the initial data of the second frame image, Figure 5The period of providing initial data is indicated by the bold horizontal line in the signal RAM. It can be seen that the period of providing gray scale data DATA by the display driving chip 10 corresponding to the first frame image does not overlap with the period of writing initial data into the RAM (i.e. writing initial data) by the display driving chip 10 corresponding to the second frame image. After the display driving chip 10 completes writing initial data of the second frame image, the display driving chip 10 reads the stored initial data of the second frame image to generate display data, and provides the display data of the second frame image to the display panel 30 in stage ②, i.e. in the period of Figure 5 In stage t2_2, the display driving chip 10 provides the display data of the second frame image to the display panel 30. Then the display panel 30 receives the display data to perform the scanning process of the second frame image.

[0055] It can be seen from the above description that the stage t1_1 required for displaying the first frame image is the period of receiving and storing initial data of the first frame image by the display driving chip 10.

[0056] In the display method provided by the embodiment of the present application, the display panel 30 feeds back to the microprocessor 20 after completing the scanning process of one frame image. The display panel 30 sends a scanning completion signal SD to the microprocessor 20. After receiving the scanning completion signal SD, the microprocessor 20 knows that the display panel 30 is ready to receive display data of the next frame image. Meanwhile, the microprocessor 20 also receives a tearing signal TE in an active state sent by the display driving chip 10. After receiving the tearing signal TE in the active state, the microprocessor 20 knows that the display driving chip 10 is ready to receive initial data of the next frame image. After receiving the tearing signal TE in the active state and the scanning completion signal SD, the microprocessor 20 provides initial data of the image. In the display method provided by the embodiment, the process of providing initial data by the microprocessor 20 to the display driving chip 10 is controlled by the scanning completion signal SD output by the display panel 30. After the display panel 30 and the display driving chip 10 are both ready, the microprocessor 20 provides initial data. In this way, the time of writing initial data of the image by the display driving chip 10 can be ensured to occur in the period before and after the scanning process. The period of outputting display data by the display driving chip 10 to the display panel 30 is separated from the period of writing initial data by the display driving chip 10 in time sequence, which can ensure the display integrity of the frame image and solve the problem of image tearing.

[0057] In some other embodiments, the display panel sends the output scanning completion signal to the display driving chip, and the display driving chip makes corresponding feedback after receiving the scanning completion signal. Figure 6 Another display method provided by the embodiment of the present application is shown in a flow chart as shown in Figure 6 The display method includes:

[0058] Step S301: The display panel receives display data of a first frame image provided by the display driving chip and performs a scanning process of the first frame image.

[0059] Step S302: After the scanning process of the first frame image is completed, the display panel outputs a scanning completion signal and sends the scanning completion signal to the display driving chip.

[0060] Step S303: The display driving chip starts to write initial data of a second frame image in response to the scanning completion signal.

[0061] Step S304: The display driving chip outputs display data of the second frame image to the display panel according to the initial data of the second frame image.

[0062] Step S305: The display panel receives the display data of the second frame image and performs a scanning process of the second frame image.

[0063] The display method provided by the embodiment performs bidirectional communication between the display panel and the display driving chip. After the scanning process of the first frame image is completed, the display panel sends the scanning completion signal to the display driving chip, and the display driving chip starts to write the initial data of the second frame image after receiving the scanning completion signal, which is equivalent to that the display driving chip writes the initial data of the image triggered by the scanning completion signal. By using the display method provided by the embodiment, the time period when the display driving chip outputs the display data of the image to the display panel is separated from the time period when the display driving chip writes the initial data of the next frame image in the time sequence, and the time when the display driving chip writes the initial data of the image is in the front and rear corridors of the scanning process. When the display driving chip outputs the display data to the display panel, the signals in the random access memory of the display driving chip can remain stable and not be overwritten by the initial data of the next frame image, thereby ensuring the display integrity of the frame image and solving the problem of image tearing.

[0064] In some other embodiments, the display method further includes: the display driving chip sends an active state tearing signal to the microprocessor at a preset frequency; the microprocessor provides the initial data of the second frame image to the display driving chip in response to the active state tearing signal; and the time when the microprocessor provides the initial data of the second frame image to the display driving chip is earlier than the time when the display driving chip receives the scanning completion signal.

[0065] Figure 7 An interaction schematic diagram of structures in another display device provided by the embodiment. Figure 7 The timing diagram of the display device in the embodiment can refer to the schematic diagram of Figure 5 in combination with Figure 5 and Figure 7To understand the display method provided by the embodiment of the present application. In this scheme, stage 1 is understood as the stage that the microprocessor 20 provides the initial data of the image to the display driving chip 10, and stage 2 is the stage that the display driving chip 10 outputs the display data of the image to the display panel 30.

[0066] The display driving chip 10 provides the display data to the display panel 30 in stage 2, and at the same time, the display driving chip 10 sends the tearing signal TE to the microprocessor 20 at a preset frequency to inform the display driving chip 10 that it is ready. In combination with the above-mentioned Figure 5 It can be seen that the display driving chip 10 sends the tearing signal TE in the active state at a preset frequency.

[0067] The display panel 30 receives the display data and performs the scanning process of the image according to the display data, and generates the scanning completion signal SD according to the completion of the scanning process and sends it to the display driving chip 10. Since the display panel 30 needs a relatively long time to complete the data writing, the completion time of the display driving chip 10 outputting the display data to the display panel 30 will be earlier than the end time of the display panel 30 completing the scanning process of a frame of image, that is, Figure 5 In the embodiment, the time when the display panel 30 starts to output the scanning completion signal SD in the low level is later than the end time of stage t2_1. The end time of the scanning process of a frame of image is also the end time of the display data writing of a frame of image.

[0068] In addition, the microprocessor 20 provides the initial data of the image to the display driving chip 10 in response to the tearing signal TE in the active state, and when the first frame of image and the second frame of image are displayed in sequence, the microprocessor 20 provides the initial data of the second frame of image to the display driving chip 10 in response to the tearing signal TE in the active state. The communication protocol between the display driving chip 10 and the microprocessor 20 can be set to set the condition for the display driving chip 10 to write the initial data of the image. That is, after the microprocessor 20 provides the initial data of the image to the display driving chip 10, the display driving chip 10 starts to write the initial data of the image after meeting certain conditions.

[0069] In the display method provided by the embodiment of the present application, the time when the microprocessor 20 provides the initial data of the image to the display driving chip 10 is earlier than the time when the display driving chip 10 receives the scanning completion signal SD. If the display driving chip 10 receives the scanning completion signal SD as a trigger condition, the display driving chip 10 starts to write the initial data of the image after receiving the active level of the scanning completion signal SD. By Figure 5It can be seen that the starting moment of the tearing signal TE of the display driving chip 10 in the active state is earlier than the moment of the display driving chip 10 receiving the active level of the scan completion signal SD. In the stage t1_2, the display driving chip 10 receives the initial data of the second frame image and stores it, and in the stage t2_2, the display driving chip 10 provides the display data of the second frame image to the display panel 30.

[0070] In the display method provided by the embodiment of the present application, the display panel 30 and the display driving chip 10 perform bidirectional communication, and the display panel 30 sends the scan completion signal SD to the display driving chip 10 after completing the scanning process of a frame image. Because the display panel 30 needs a relatively long time to complete the writing of the display data, the display driving chip 10 outputs the display data to the display panel 30 at a moment earlier than the end moment of the display panel 10 completing the scanning process of a frame image, and the display driving chip 10 sends the tearing signal TE in the active state to the microprocessor 20 at a moment earlier than the moment of receiving the scan completion signal SD. After receiving the tearing signal TE in the active state, the microprocessor 20 outputs the initial data of the next frame image to the display driving chip 10, and the display driving chip 10 waits for the triggering of the scan completion signal SD at this time. After receiving the scan completion signal SD, the display driving chip 10 starts to write the initial data of the image provided by the microprocessor 20. In the display method provided by the embodiment, the process of the display driving chip 10 writing the initial data is controlled by the display panel 30, and the display driving chip 10 starts to write the initial data provided by the microprocessor 20 only after the display panel 30 is ready. In this way, it can be ensured that the moment of the display driving chip 10 writing the initial data of the image occurs in the scanning process, and the time period of the display panel 30 writing the display data is separated from the time period of the display driving chip 10 writing the initial data corresponding to the next frame image in the time sequence, so that the display integrity of the frame image can be ensured, and the problem of image tearing can be solved.

[0071] In some other embodiments, the display panel sends the output scan completion signal to the display driving chip, and the display driving chip makes corresponding feedback after receiving the scan completion signal. Figure 8 Another signal time sequence diagram is provided for the embodiment of the present application. The display method provided by the embodiment of the present application continuously displays the first frame image and the second frame image. Figure 8 and Figure 7 The process of the display method provided by the embodiment of the present application continuously displaying the first frame image and the second frame image can be understood in combination with Figure 8 In the stage t1_1 and t1_2, the display driving chip 10 writes the initial data of the image, and in the stage t2_1 and t2_2, the display driving chip 10 provides the display data of the image to the display panel 30. Figure 8The stages t1_1 and t2_1 correspond to the stages required for the display panel to display the first frame image, and the stages t1_2 and t2_2 correspond to the stages required for the display panel to display the second frame image.

[0072] As shown in FIG. 2, at the stage t2_1, the display driving chip 10 provides the display data of the first frame image to the display panel 30, wherein the display data includes the row scanning start data STV and the gray scale data DATA. In addition, the display driving chip 10 also sends the tearing signal TE in the active state to the microprocessor 20 at a preset frequency. Figure 8

[0073] After receiving the tearing signal TE in the active state, the microprocessor 20 provides the initial data of the second frame image to the display driving chip 10, and the stage t1_2 is the period for the display driving chip 10 to write the initial data of the second frame image. That is, after the microprocessor 20 provides the initial data of the image to the display driving chip 10, the display driving chip 10 immediately starts to write the initial data, and the display driving chip 10 does not need other trigger conditions to write the initial data of the image. Figure 8 It can be seen that the display driving chip 10 has started to write the initial data of the second frame image when the stage t2_1 has not yet ended. In a conventional display driving chip, only one access memory is provided, while in the display panel applying the display method provided by the embodiment of the present application, two memories can be provided. The first memory and the second memory alternately store the initial data of the image. For example, the first memory stores the initial data of the first frame image, and the display data of the first frame image is generated by reading the initial data in the first memory and provided to the display panel. In the process of the display driving chip providing the display data of the first frame image to the display panel, the second memory starts to store the initial data of the second frame image, and the second memory and the first memory are independent of each other, so that the data in the first memory is stable in the process of providing the display data of the first frame image to the display panel.

[0074] After completing the scanning process of the first frame image, the display panel 30 sends the scanning completion signal SD to the display driving chip 10. Figure 8 It can be seen that the time when the display driving chip 10 receives the scanning completion signal SD is later than the end time when the display driving chip 10 outputs the display data of the first frame image. And the time when the display driving chip 10 starts to write the initial data of the second frame image is earlier than the time when the display driving chip 10 receives the scanning completion signal SD. The display driving chip 10 outputs the display data of the second frame image to the display panel 10 at the stage t2_2 in response to the scanning completion signal SD.

[0075] ​The display method provided by the embodiment realizes bidirectional communication between the display panel 30 and the display driving chip 10. The display panel 30 sends a scanning completion signal SD to the display driving chip 10 after completing the scanning process of the first frame of image, and the display driving chip 10 outputs the display data of the second frame of image to the display panel 30 in response to the scanning completion signal SD, which is triggered by the scanning completion signal SD to output the display data of the image. The display driving chip 10 starts to wait for the scanning completion signal SD after writing the initial data of the image, and then executes the process of outputting the display data to the display panel 30 after receiving the active level of the scanning completion signal SD. By using the display method provided by the embodiment, the scanning completion signal SD output by the display panel 30 triggers the display driving chip 10 to output the display data of the image, so that the period of outputting the display data of the image from the display driving chip 10 to the display panel 30 occurs after the display panel 30 completes the scanning process of a frame of image, that is, the display panel 30 starts to receive the display data of the next frame of image only after completing the scanning process of a frame of image, thereby ensuring the display integrity of the frame of image and solving the problem of tearing of the image.

[0076] In some embodiments, the display method is combined with Figure 8 As shown in the timing diagram, the stage t1_2 is the period of writing the initial data of the second frame of image by the display driving chip 10, and the stage t2_2 is the period of outputting the display data of the second frame of image by the display driving chip 10 to the display panel 30, and the stage t1_2 and the stage t2_1 partially overlap. In the display method provided by the embodiment, the scanning completion signal SD output by the display panel 30 is sent to the display driving chip 10, and the display driving chip 10 outputs the display data of the second frame of image to the display panel 10 after receiving the scanning completion signal SD and completing the writing of the initial data of the second frame of image, so that the period of outputting the display data of the image by the display driving chip 10 to the display panel 30 occurs after the display panel 30 completes the scanning process of a frame of image, and the display driving chip 10 starts to output the display data of the frame of image only after completing the writing of the initial data of the image. In the application, two access memories are arranged in the display driving chip 10, and the initial data of the next frame of image is stored in the other access memory while the display driving chip 10 reads the data in one of the access memories to output the display data to the display panel 30. In this way, the signal in the access memory read by the display driving chip 10 to provide the display data is stable. Moreover, the display panel 30 starts to receive the display data of the next frame of image only after completing the scanning process of a frame of image, thereby ensuring the display integrity of the frame of image and solving the problem of tearing of the image.

[0077] In some embodiments, the display method is combined with Figure 5As shown in FIG. 1, the high level of the tearing signal TE indicates an active state, and the low level of the scanning completion signal SD indicates an inactive state. The microprocessor 20 receives the active state of the tearing signal TE at an earlier time than the microprocessor or the display driving chip receives the scanning completion signal SD.

[0078] In the scheme that the microprocessor 20 receives the scanning completion signal SD, the microprocessor 20 receives the active state of the tearing signal TE first, and then receives the scanning completion signal SD, thereby triggering the microprocessor 20 to output the initial data of the image to the display driving chip 10. In this embodiment, the display driving chip 10 sends the active state of the tearing signal TE to the microprocessor 20 at a preset frequency, to inform the microprocessor 20 that the display driving chip 10 is ready. After receiving the active state of the tearing signal TE, the microprocessor 20 starts to wait for the scanning completion signal SD, and triggers the process of outputting the initial data to the display driving chip 10 after receiving the scanning completion signal SD.

[0079] In the scheme that the microprocessor 20 receives the scanning completion signal SD, the microprocessor 20 receives the active state of the tearing signal TE first, and then receives the scanning completion signal SD, thereby triggering the microprocessor 20 to output the initial data of the image to the display driving chip 10. In this embodiment, the display driving chip 10 sends the active state of the tearing signal TE to the microprocessor 20 at a preset frequency, to inform the microprocessor 20 that the display driving chip 10 is ready. After receiving the active state of the tearing signal TE, the microprocessor 20 starts to wait for the scanning completion signal SD, and triggers the process of outputting the initial data to the display driving chip 10 after receiving the scanning completion signal SD.

[0080] In some embodiments, the active state of the tearing signal TE is combined with the scanning completion signal SD. Figure 5 As shown in FIG. 1, the high level of the tearing signal TE indicates an active state, and the low level of the scanning completion signal SD indicates an inactive state. The microprocessor 20 receives the active state of the tearing signal TE at an earlier time than the microprocessor or the display driving chip receives the scanning completion signal SD.

[0081] In the scheme that the microprocessor 20 receives the scanning completion signal SD, the active state of the tearing signal TE is combined with the scanning completion signal SD, to ensure that the microprocessor 20 receives the active state of the tearing signal TE at an earlier time than the microprocessor or the display driving chip receives the scanning completion signal SD.

[0082] In some embodiments, the ending moment of the tearing signal TE in the active state is later than the ending moment of the active level of the scanning completion signal SD.

[0083] In some embodiments, the display data output by the display driving chip includes row scanning data and grayscale data. The display data can be combined with Figure 5 or Figure 8 For example, the row scanning data includes row scanning start data STV, and the grayscale data DATA includes row grayscale data. The scanning start data STV is used to control the operation of the shift driving circuit, and the shift driving circuit controls the scanning of multiple row pixel circuits in the display panel row by row. The row grayscale data corresponds to one row of pixel circuits. When scanning one row of pixel circuits, the row grayscale data is input to the row of pixel circuits to make the multiple sub-pixels controlled by the row of pixel circuits emit light. The display method provided by the embodiments of the present application includes the following steps: in step S102, the display data of the second frame of image is output to the display panel, including outputting the row scanning start data and the row grayscale data; the display method further includes step S103: the display driving chip sends the tearing signal in the active state to the microprocessor at a preset frequency. The display driving chip communicates with the microprocessor, and informs the state of the display driving chip by sending the tearing signal in the active state to the microprocessor. The microprocessor outputs the initial data of the image to the display driving chip in response to the tearing signal in the active state.

[0084] In some embodiments, during the process of displaying one frame of image, the moment when the last row of pixel circuits in the display panel completes the writing of the row grayscale data is recorded as the moment when the display panel completes the scanning process of one frame of image. For example, Figure 5As shown, the stage t2_1 represents a time period in which the display driving chip provides display data to the display panel, and the end time of the scanning process of a frame completed by the display panel according to the display data is later than the time at which the display driving chip completes providing the display data. In the embodiment of the present application, the duration of the tearing signal TE in the active state at least partially overlaps with the active level period of the scanning completion signal SD. In another expression, the time period in which the last row of pixel circuits in the display panel writes row gray scale data partially coincides with the duration of the tearing signal TE in the active state, and the time at which the last row of pixel circuits in the display panel completes writing the row gray scale data is earlier than the end time of the tearing signal TE in the active state. In the display method provided by the embodiment, the display driving chip sends the tearing signal TE in the active state to the microprocessor at a preset frequency to inform the microprocessor that the display driving chip is ready. The duration of the tearing signal TE in the active state coincides with the time period in which the last row of pixel circuits in the display panel writes row gray scale data, and during the coinciding period, the display driving chip has not started writing initial data of the next frame of image because the display panel has not output the scanning completion signal SD, so the coinciding period will not cause display tearing. In addition, the scanning completion signal SD is output after the last row of pixel circuits in the display panel completes writing row gray scale data, and the time at which the last row of pixel circuits in the display panel completes writing row gray scale data is set to be earlier than the end time of the tearing signal TE in the active state, so as to ensure that the display driving chip or the microprocessor receives the scanning completion signal SD when the tearing signal TE is still in the active state, thereby ensuring that the display driving chip starts writing initial data of the image after the display panel outputs the scanning completion signal SD, so that the time period in which the display driving chip outputs display data of the image to the display panel is separated in time sequence from the time period in which the display driving chip writes initial data of the next frame of image, and the display integrity of the frame picture is ensured, and the problem of picture tearing is solved.

[0085] In some embodiments, the display panel includes row scan lines and shift driving circuits. One row scan line drives one row of pixel circuits. The shift driving circuit includes multiple cascaded shift registers, and the output of the shift registers is coupled to the row scan lines. The shift registers can be any structure in the prior art, and are not illustrated in the accompanying drawings. In the display method provided by this embodiment, step S101, after the display panel completes the scanning process of the first frame image, outputs a scan completion signal, including: the display panel outputs a scan completion signal according to the enable signal output by the last-stage shift register in the shift driving circuit. During the scanning process of the display panel, the enable signal output by the last-stage shift register cooperates with the row grayscale data to drive the last row of pixel circuits, thereby driving the sub-pixels controlled by the last row of pixel circuits to emit light, completing the scanning process of one frame image. In this embodiment, outputting a scan completion signal according to the enable signal output by the last-stage shift register can accurately indicate that the display panel has completed the scanning process of one frame image and provide feedback.

[0086] In some implementations... Figure 9 This is a schematic diagram of another display device provided in an embodiment of the present invention, such as... Figure 9 As shown, the display device includes a conversion module 40, one input terminal of which is electrically connected to the output terminal of the last stage shift register; the conversion module 40 is used to convert the signal input to its input terminal into a logic level that matches the display driver chip 10 or the microprocessor 20. Figure 9 The illustration only shows the conversion module 40 sending the scan completion signal SD to the display driver chip 10. In the display method provided by this embodiment, outputting the scan completion signal based on the enable signal output by the last stage shift register in the shift drive circuit includes: after receiving the enable signal output by the last stage shift register at one input terminal of the conversion module 40, converting the enable signal into the scan completion signal SD and outputting it. By using the display method provided by this embodiment, the conversion module 40 converts the enable signal output by the last stage shift register in the display panel 30, ensuring that the logic level of the converted scan completion signal SD matches that of the display driver chip 10 or the microprocessor 20, thereby ensuring that the display driver chip 10 or the microprocessor 20 can respond accordingly to the scan completion signal SD.

[0087] In other implementations, Figure 10 This is a schematic diagram of another display device provided in an embodiment of the present invention, such as... Figure 10 As shown, the display device includes a voltage regulator module 50, which is used to adjust the voltage value of the input signal at its input terminal to match the voltage value of the display driver chip 10 or the microprocessor 20. Figure 10The illustration only shows the voltage regulator module 50 sending the adjusted scan completion signal SD to the display driver chip 10. In the display method provided by this embodiment, after completing the scanning process of the first frame image, the display panel 10 outputs a scan completion signal, including: the display panel 10 provides the scan completion signal to the voltage regulator module 50, the voltage regulator module 50 adjusts the voltage value of the scan completion signal and then outputs it. After adjustment by the voltage regulator module 50, the signal logic of the scan completion signal SD remains unchanged; only the voltage value changes. The display method provided by this embodiment utilizes the voltage regulator module 50 to adjust the voltage value of the scan completion signal, ensuring that the adjusted voltage value of the scan completion signal SD matches that of the display driver chip 10 or the microprocessor 20, thereby ensuring that the display driver chip 10 or the microprocessor 20 can respond accordingly to the scan completion signal SD.

[0088] Based on the same inventive concept, embodiments of the present invention also provide a display device, which can perform display using the display method provided in embodiments of the present invention. Figure 11 This is a schematic diagram of a display device provided in an embodiment of the present invention. Figure 11 As shown, the display device includes a display panel 30, a display driver chip 10, and a microprocessor (…). Figure 11 (Not shown). The display panel 30 includes a display area AA and a non-display area NA. A flexible circuit board 60 is bonded to the non-display area NA, and a display driver chip 10 is fixed on the flexible circuit board 60. That is, the display driver chip 10 is coupled to the display panel 30 through wires on the flexible circuit board 60. The flexible circuit board 60 is coupled to a microprocessor. In some other embodiments, the display driver chip 10 is directly fixed to the non-display area NA of the display panel 30, which is not shown in the accompanying drawings.

[0089] The operation of the display panel 30, display driver chip 10, and microprocessor in the display device can be understood in conjunction with the above-described display method embodiments. In the display device provided by the embodiments of the present invention, the display panel 30 is used to output a scan completion signal after completing the scanning process of the first frame image. The display panel 30 sends the scan completion signal to the display driver chip 10 or to the microprocessor. The display driver chip 10 is used to start writing the initial data of the second frame image after the microprocessor or the display driver chip 10 receives the scan completion signal, and outputs the display data of the second frame image to the display panel 10 according to the initial data. Alternatively, the display driver chip 30 outputs the display data of the second frame image to the display panel 10 in response to the scan completion signal, and the display data is generated according to the initial data. The second frame image is the next frame image after the first frame image.

[0090] The display device provided by the embodiment of the present application can feed back a scanning completion signal after the display panel completes the scanning process of the first frame of image, and the display panel outputs the scanning completion signal to indicate that the display panel is ready to receive the display data of the next frame of image. After the display panel outputs the feedback signal of the scanning completion signal, the display driving chip writes the initial data of the second frame of image provided by the microprocessor or outputs the display data of the second frame of image to the display panel in response to the scanning completion signal. When the display panel needs to display the first frame of image and the second frame of image in sequence, the display panel actively feeds back the scanning completion of the first frame of image by outputting the scanning completion signal, and the display driving chip outputs the display data of the second frame of image to the display panel after the display panel outputs the scanning completion signal, so that the display driving chip does not provide the display data of the next frame to the display panel before the current frame of data writing process is completed, thereby ensuring the display integrity of the frame and avoiding the tearing of the image.

[0091] In some embodiments, Figure 12 Another display device provided by the embodiment of the present application is shown in FIG. 3. Figure 12 As shown in FIG. 3, the display panel 30 includes a row scanning line 31 and a shift driving circuit 32. One row scanning line 31 drives one row of pixel circuits, and one row of pixel circuits includes a plurality of pixel circuits 33. The shift driving circuit 32 includes a plurality of shift registers VSR connected in cascade, and the output end of the shift register VSR is coupled with the row scanning line 31. Figure 12 In the embodiment shown in FIG. 3, the shift driving circuit 32 is arranged on one side of the display area AA, and one end of one row scanning line 31 is connected with one shift register VSR. In other embodiments, the shift driving circuit 32 is arranged on both sides of the display area AA, and both ends of one row scanning line 31 are respectively connected with one shift register VSR, which is not shown in the figure.

[0092] As shown in FIG. 4, the display panel 30 includes a conversion module 40, and one input end of the conversion module 40 is electrically connected with the output end of the last shift register VSR in the shift driving circuit 32. The display panel 30 is configured to output a scanning completion signal according to the enable signal output by the last shift register VSR in the shift driving circuit 32; and the conversion module 40 is configured to convert the enable signal into the scanning completion signal and output the scanning completion signal after receiving the enable signal output by the last shift register VSR. Figure 12 In the embodiment shown in FIG. 4, the conversion module 40 is connected to the display driving chip 10, so that the conversion module 40 sends the scanning completion signal converted from the enable signal to the display driving chip 10. The logic level of the scanning completion signal after the conversion by the conversion module 40 can be matched with the display driving chip 10. Figure 12

[0093] ​In other embodiments, the conversion module 40 is coupled to the microprocessor in the display device via wires on the flexible circuit board. The conversion module 40 then converts the enable signal into a scan completion signal and sends it to the microprocessor.

[0094] The conversion module 40 converts the enable signal output from the last-stage shift register in the display panel 30, so that the logic level of the converted scan completion signal can match the display driver chip 10 or the microprocessor in the display device, thereby ensuring that the display driver chip 10 or the microprocessor can make corresponding feedback in response to the scan completion signal.

[0095] In some implementations... Figure 13 This is a schematic diagram of a conversion module provided in an embodiment of the present invention, such as... Figure 13 As shown, the conversion module 40 includes a first transistor T1, a second transistor T2, a third transistor T3, and a fourth transistor T4. The control terminal of the first transistor T1 is electrically connected to the output terminal VSR-out of the last-stage shift register VSR. The first electrode of the first transistor T1 receives a first low-level signal VGL1, and the second electrode of the first transistor T1 is electrically connected to the output terminal OUT of the conversion module 40. The control terminal of the second transistor T2 is connected to the first node N1. The first electrode of the second transistor T2 receives a first high-level signal VGH1, and the second electrode of the second transistor T2 is electrically connected to the output terminal OUT of the conversion module 40; the voltage value of the first high-level signal VGH1 is greater than the voltage value of the first low-level signal VGL1. The control terminal of the third transistor T3 receives a first control signal CK. The first electrode of the third transistor T3 receives a second low-level signal VGL2, and the second electrode of the third transistor T3 is connected to the first node N1. The control terminal of the fourth transistor T4 is electrically connected to the output terminal VSR-out of the last stage shift register. The first terminal of the fourth transistor T4 receives the second high-level signal VGH2, and the second terminal of the fourth transistor T4 is connected to the first node N1. The voltage value of the second high-level signal VGH2 is greater than the voltage value of the second low-level signal VGL2.

[0096] Figure 13 The transistors in the diagram are illustrated as p-type transistors. In some other embodiments, the transistors in the conversion module 40 may also be n-type transistors, which will not be shown in the diagram here.

[0097] Taking a low-level signal output from the output terminal VSR-out of the last stage shift register as an example. When a low-level signal is output from the output terminal VSR-out, the first transistor T1 and the fourth transistor T4 are turned on, the first transistor T1 provides the first low-level signal VGL1 to the output terminal OUT after being turned on, and the second transistor T2 writes the second high-level signal VGH2 to the first node N1 after being turned on, the high level of the first node N1 controls the second transistor T2 to be turned off, and at this time, the output terminal OUT outputs a low-level signal of the first low-level signal VGL1. When a high-level signal is output from the output terminal VSR-out, the first transistor T1 and the fourth transistor T4 are turned off, and at this time, the third transistor T3 is controlled to be turned on by the first control signal CK, so that the second low-level signal VGL2 is written to the first node N1, and the second transistor T2 is turned on under the control of the low level of the first node N1, and at this time, the output terminal OUT outputs a high-level signal of the first high-level signal VGH1. In this embodiment, the low-level signal of the first low-level signal VGL1 output from the output terminal OUT can be used as a scan completion signal output by the display panel.

[0098] In some embodiments, the display panel 30 includes a pixel circuit, a light emitting device, a first positive power supply line, a first negative power supply line, and a reset signal line. The first positive power supply line provides a first positive power supply signal, the first negative power supply line provides a first negative power supply signal, and the reset signal line provides a reset signal. One input terminal of the pixel circuit is coupled to the first positive power supply line, another input terminal of the pixel circuit is coupled to the reset signal line, and an output terminal of the pixel circuit is coupled to a first electrode of the light emitting device. The second electrode of the light emitting device is coupled to the first negative power supply line. The specific structure of the pixel circuit is not limited in the embodiments of the present application, and the pixel circuit can be any one in the prior art. The light emitting device can be an organic light emitting device or an inorganic light emitting device. The first positive power supply signal has a voltage value greater than that of the first negative power supply signal.

[0099] The display panel 30 includes a shift driving circuit (see Figure 12 for a schematic diagram). The shift driving circuit includes a driving signal line and a plurality of shift registers connected in cascade. The driving signal line includes a second positive power supply line and a second negative power supply line. The second positive power supply line provides a second positive power supply signal, and the second negative power supply line provides a second negative power supply signal. The voltage value of the second positive power supply signal is greater than that of the second negative power supply signal. The shift registers are respectively coupled to the second positive power supply line and the second negative power supply line.

[0100] The first positive power supply signal and the second positive power supply signal are multiplexed as a first high-level signal VGH1; the first positive power supply signal and the second positive power supply signal are multiplexed as a second high-level signal VGH2; the first negative power supply signal, the second negative power supply signal, and the reset signal are multiplexed as a first low-level signal VGL1; the first negative power supply signal, the second negative power supply signal, and the reset signal are multiplexed as a second low-level signal VGL2. The voltage values of the first high-level signal VGH1 and the second high-level signal VGH2 can be equal or not equal, and the voltage values of the first low-level signal VGL1 and the second low-level signal VGL2 can be equal or not equal. In this embodiment, the original signals in the display panel are multiplexed to drive the conversion module 40 to work, so that the wiring in the display panel 30 can be reduced and the space can be saved. Moreover, the working of the conversion module 40 does not need the display driving chip to provide additional signal support.

[0101] The first high-level signal VGH1, the second high-level signal VGH2, the first low-level signal VGL1, and the second low-level signal VGL2 can also use other existing signals in the display panel, which will not be described one by one here.

[0102] In some embodiments, the first control signal CK in the conversion module 40 is a periodic pulse signal, and the driving signal line in the shift driving circuit further includes a clock signal line, and the clock signal provided by the clock signal line is multiplexed as the first control signal CK.

[0103] In another embodiment, Figure 14 Another display device provided by the embodiment of the present application is shown in the schematic diagram as Figure 14 The display panel 30 includes row scanning lines 31 and a shift driving circuit 32, one row scanning line 31 drives one row of pixel circuits, one row of pixel circuits includes a plurality of pixel circuits 33, and the shift driving circuit 32 includes a plurality of shift registers VSR connected in cascade, and the output end of the shift register VSR is coupled with the row scanning line 31. Figure 14 Only the shift driving circuit 32 on one side of the display area AA is shown in the schematic diagram, and one end of one row scanning line 31 is connected with one shift register VSR. In another embodiment, the shift driving circuit 32 is arranged on both sides of the display area AA, and both ends of one row scanning line 31 are respectively connected with one shift register VSR, which will not be shown in the schematic diagram.

[0104] As shown in Figure 14As shown, the display device further comprises a voltage stabilizing module, the voltage stabilizing module 50 is coupled with the display panel 30, and the voltage stabilizing module 50 is connected with the output end of the last stage shift register VSR in the shift driving circuit 32. Wherein, the display panel 30 is used to output a scanning completion signal according to the enable signal output by the last stage shift register VSR in the shift driving circuit 32, and the voltage stabilizing module 50 is used to adjust the voltage value of the scanning completion signal and output.

[0105] In some embodiments, the voltage stabilizing module 50 sends the adjusted scanning completion signal to the display driving chip 10. In some embodiments, the voltage stabilizing module 50 sends the adjusted scanning completion signal to the microprocessor.

[0106] The signal logic of the scanning completion signal adjusted by the voltage stabilizing module 50 is unchanged, and only the voltage value is changed. By adjusting the voltage value of the scanning completion signal by the voltage stabilizing module 50, the voltage value of the adjusted scanning completion signal can be matched with the module receiving the scanning completion signal, so as to ensure that the module can make corresponding feedback after responding to the scanning completion signal.

[0107] The specific structure of the voltage stabilizing module 50 is not limited in the embodiments of the present application, and the voltage stabilizing module 50 can be any circuit structure in the prior art which does not change the signal logic but only changes the voltage value.

[0108] In some embodiments, as shown in FIG. 1, Figure 14 As shown, the display panel 30 is coupled with the display driving chip 10 through the flexible circuit board 60, and the voltage stabilizing module 50 is arranged on the flexible circuit board 60. The space on the flexible circuit board 60 is relatively large, and arranging the voltage stabilizing module 50 does not affect the wiring on the flexible circuit board 60. And the coupling of the voltage stabilizing module 50 with the display driving chip 10 or the coupling of the voltage stabilizing module 50 with the microprocessor can be more easily realized.

[0109] Based on the same inventive concept, the embodiments of the present application also provide a display device, Figure 15 The display device provided by the embodiments of the present application is shown in the schematic diagram, and the display device comprises a display panel, a display driving chip and a microprocessor. The display device adopts the display method provided by any of the embodiments of the present application for display. The display method has been described in the above embodiments, and will not be described here. The display device provided by the embodiments of the present application can be, for example, a mobile phone, a computer, a tablet computer, a television, a smart wearable product or the like.

[0110] The above only describes the preferred embodiments of the present application and is not intended to limit the present application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

[0111] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, and are not intended to limit the present application; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that the technical solutions recorded in the foregoing embodiments can still be modified, or some or all of the technical features can be replaced by equivalents; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A display method characterized by comprising: The display method is used in a display device comprising a display panel, a display driving chip and a microprocessor; the display panel comprises row scanning lines and a shift driving circuit, and one row scanning line drives one row of pixel circuits; The shift driving circuit comprises a plurality of shift registers connected in cascade, and the output terminals of the shift registers are coupled with the row scanning lines; the display method comprises: The display panel outputs a scanning completion signal after completing the scanning process of a first frame of image, comprising: the display panel outputs the scanning completion signal according to an enable signal output by a last shift register in the shift driving circuit; After receiving the scanning completion signal, the microprocessor or the display driving chip writes initial data of a second frame of image provided by the microprocessor into the display driving chip and outputs display data of the second frame of image to the display panel according to the initial data; or, the display driving chip outputs display data of a second frame of image to the display panel in response to the scanning completion signal, and the display data is generated according to initial data provided by the microprocessor; Wherein, the second frame of image is a next frame of image of the first frame of image.

2. The display method according to claim 1, wherein The display panel outputs a scanning completion signal after completing the scanning process of a first frame of image, comprising: the display panel sends the scanning completion signal to the microprocessor; The microprocessor provides the initial data of the second frame of image after receiving the scanning completion signal.

3. The display method according to claim 2, wherein The display method further comprises: the display driving chip sends a tearing signal in an active state to the microprocessor at a preset frequency; The microprocessor provides the initial data of the second frame of image after receiving the scanning completion signal, comprising: the microprocessor provides the initial data of the second frame of image after receiving the tearing signal in the active state and the scanning completion signal.

4. The display method according to claim 1, wherein The display panel outputs a scanning completion signal after completing the scanning process of a first frame of image, comprising: the display panel sends the scanning completion signal to the display driving chip; The display driving chip starts to write initial data of a second frame of image provided by the microprocessor, comprising: the display driving chip starts to write the initial data of the second frame of image in response to the scanning completion signal.

5. The display method according to claim 4, wherein The display method further comprises: the display driving chip sends a tearing signal in an active state to the microprocessor at a preset frequency; The microprocessor provides the initial data of the second frame of image to the display driving chip in response to the tearing signal in the active state; wherein, the time when the microprocessor provides the initial data of the second frame of image to the display driving chip is earlier than the time when the display driving chip receives the scanning completion signal.

6. The display method of claim 1, wherein the display driving chip outputs display data of a second frame image to the display panel in response to the scan completion signal, and the display driving chip comprises: the display driving chip sends an active-state tearing signal to the microprocessor at a preset frequency; the microprocessor provides the initial data of the second frame image to the display driving chip after receiving the active-state tearing signal; the display driving chip starts writing the initial data of the second frame image at a time earlier than when the display driving chip receives the scan completion signal.

7. The display method of claim 6, wherein the display driving chip outputs the display data of the second frame image to the display panel after receiving the scan completion signal and the initial data of the second frame image is written completely, and the display method further comprises: the display driving chip sends an active-state tearing signal to the microprocessor at a preset frequency; the microprocessor receives the active-state tearing signal at a time earlier than when the microprocessor or the display driving chip receives the scan completion signal.

8. The display method according to claim 1, wherein the display driving chip sends an active-state tearing signal to the microprocessor at a preset frequency; a valid level period of the scan completion signal and a duration period of the active-state tearing signal at least partially overlap. The display device comprises a conversion module, one input end of the conversion module is electrically connected with the output end of the last stage shift register; the conversion module is used for converting the signal inputted by its input end into a logic level matching the display driving chip or the microprocessor; 9. The display method according to claim 1, wherein The display device further comprises a voltage stabilizing module, the voltage stabilizing module is used for adjusting the voltage value of the signal inputted by its input end to match the voltage value of the display driving chip or the microprocessor; The display panel outputs a scan completion signal after completing the scanning process of a first frame image, comprising: the display panel provides the scan completion signal to the voltage stabilizing module, and the voltage stabilizing module adjusts the voltage value of the scan completion signal and then outputs. The display device comprises a display panel, a display driving chip and a microprocessor; wherein the display panel comprises a row scanning line and a shift driving circuit, one row scanning line drives one row of pixel circuits; the shift driving circuit comprises a plurality of shift registers cascaded, and the output end of the shift register is coupled with the row scanning line; 10. The display method according to claim 1, wherein The display panel is used for outputting a scan completion signal after completing the scanning process of a first frame image; comprising: the display panel is used for outputting the scan completion signal according to the enable signal outputted by the last stage shift register in the shift driving circuit; ​ 11. The display method according to claim 1, wherein ​ ​ 12. A display device comprising: ​ ​ The display driving chip is configured to start writing initial data of a second frame image after the microprocessor or the display driving chip receives the scan completion signal, and output display data of the second frame image to the display panel according to the initial data; or the display driving chip is configured to output display data of a second frame image to the display panel in response to the scan completion signal, the display data being generated according to initial data; wherein the second frame image is a next frame image of the first frame image.

13. The display device of claim 12, wherein, The display panel comprises a conversion module, one input end of the conversion module being electrically connected to an output end of the shift register of the last stage in the shift driving circuit; and the conversion module is configured to convert an enable signal output by the shift register of the last stage into the scan completion signal and output the scan completion signal after receiving the enable signal.

14. The display device of claim 13, wherein, The conversion module comprises a first transistor, a second transistor, a third transistor and a fourth transistor. The control end of the first transistor is electrically connected to the output end of the shift register of the last stage, the first pole of the first transistor receives a first low-level signal, and the second pole of the first transistor is electrically connected to the output end of the conversion module. The control end of the second transistor is connected to a first node, the first pole of the second transistor receives a first high-level signal, and the second pole of the second transistor is electrically connected to the output end of the conversion module; the voltage value of the first high-level signal is greater than the voltage value of the first low-level signal. The control end of the third transistor receives a first control signal, the first pole of the third transistor receives a second low-level signal, and the second pole of the third transistor is connected to the first node. The control end of the fourth transistor is electrically connected to the output end of the shift register of the last stage, the first pole of the fourth transistor receives a second high-level signal, and the second pole of the fourth transistor is connected to the first node; the voltage value of the second high-level signal is greater than the voltage value of the second low-level signal.

15. The display device of claim 14, wherein, The display panel comprises a pixel circuit, a light emitting device, a first positive electrode power supply line, a first negative electrode power supply line and a reset signal line; the first positive electrode power supply line provides a first positive electrode power supply signal, the first negative electrode power supply line provides a first negative electrode power supply signal, and the reset signal line provides a reset signal; one input end of the pixel circuit is coupled to the first positive electrode power supply line, another input end of the pixel circuit is coupled to the reset signal line, the output end of the pixel circuit is coupled to a first electrode of the light emitting device, and a second electrode of the light emitting device is coupled to the first negative electrode power supply line. The display panel comprises a shift driving circuit, the shift driving circuit comprises a driving signal line and a plurality of shift registers in cascade, the driving signal line comprises a second positive power line and a second negative power line, the second positive power line provides a second positive power signal, and the second negative power line provides a second negative power signal; and the shift registers are coupled with the second positive power line and the second negative power line respectively. One of the first positive power signal and the second positive power signal is multiplexed as the first high-level signal; one of the first positive power signal and the second positive power signal is multiplexed as the second high-level signal; one of the first negative power signal, the second negative power signal and the reset signal is multiplexed as the first low-level signal; and one of the first negative power signal, the second negative power signal and the reset signal is multiplexed as the second low-level signal.

16. The display device according to claim 12, characterized in that, The display device further comprises a voltage stabilizing module, the voltage stabilizing module is coupled with the display panel, and the voltage stabilizing module is used for adjusting the voltage value of the scan completion signal and outputting.

17. The display device according to claim 16, characterized in that, The display panel is coupled with the display driving chip through a flexible circuit board, and the voltage stabilizing module is arranged on the flexible circuit board.

18. A display device comprising: The display device comprises a display panel, a display driving chip and a microprocessor, and the display device is displayed by using the display method in any one of claims 1 to 11.

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