CN-122024629-A - Display driving method, device and display system

Abstract

The application provides a display driving method, a device and a display system, which are applied to a display driving device, wherein the display driving device comprises a display driving chip and an image loading unit, the display driving chip comprises a frame buffer area and a zone bit, the display driving device is used for controlling a micro LED display screen, the method comprises the steps that the image loading unit sends an image writing application instruction to the display driving chip, the image loading unit reads the current state of the zone bit from the display driving chip, and the frame buffer area executes a read-write process corresponding to the current state of the zone bit. The embodiment of the application can control the micro LED display screen by utilizing the single frame buffer area by restricting the read-write process of the frame buffer area, thereby reducing the size of the display drive chip and lowering the design difficulty of the display drive chip.

Inventors

• PANG WEIQU
• ZHU KAISONG
• ZHANG KE
• HUANG LI

Assignees

• 深圳市思坦科技有限公司

Dates

Publication Date

20260512

Application Date

20241112

Claims (20)

1. 1. The display driving method is characterized by being applied to a display driving device, wherein the display driving device comprises a display driving chip and an image loading unit, the display driving chip comprises a frame buffer area and a zone bit, and the display driving device is used for controlling a display screen and comprises the following steps: The image loading unit sends an image writing application instruction to the display driving chip and reads the current state of the marker bit; the frame buffer area executes a read-write process corresponding to the current state of the flag bit; In the step of executing the read-write process corresponding to the current state of the flag bit in the frame buffer area: Determining a frame buffer area event corresponding to the current state of the flag bit as allowing reading, wherein the frame buffer area sends first target image data to a display screen, and the first target image data is stored in the frame buffer area; And if the frame buffer event corresponding to the current state of the flag bit is determined to be write-enabling, the image loading unit writes second target image data into the frame buffer in response to the image writing application instruction, wherein the second target image data is stored in the image loading unit.
2. 2. The method of claim 1, wherein the step of determining the position of the substrate comprises, After the step of the frame buffer sending the first target image data to the display screen, the method further comprises: and if the first target image data is sent completely, switching the frame buffer area event corresponding to the zone bit state from allowing reading to allowing writing.
3. 3. The method of claim 2, wherein the display screen is a micro LED display screen.
4. 4. The method of claim 3, wherein the display driver chip divides the first target image data based on a bit plane, the first target image being divided into a plurality of bit plane image data; The step of the frame buffer transmitting the first target image data to the display screen: and the frame buffer area sequentially sends each bit plane image data to the micro LED display screen.
5. 5. The method of claim 4, wherein the step of determining the position of the first electrode is performed, And if the micro LED display screen stops reading the bit plane image data of the frame buffer zone, the first target image data is sent completely.
6. 6. The method according to claim 2, wherein after the step of the image loading unit writing second target image data to the frame buffer in response to the write image application instruction, the method further comprises: and the writing of the second target image data is completed, and a frame buffer event corresponding to the state of the flag bit is switched from the writing permission to the reading permission.
7. 7. The method according to claim 2, wherein in the step of the image loading unit reading the current state of the flag bit from the display driving chip, the micro LED display screen performs out-of-order scanning: for each scanning period, the frame buffer event corresponding to the current state of the flag bit is initially read-enabled, and the frame buffer event corresponding to the current state of the flag bit is changed to write-enabled until the nth time slice.
8. 8. The method of claim 2, wherein the micro LED display screen scans out of order, performing the following for each micro LED display screen scan cycle: judging that the micro LED display screen sends an image writing application instruction in the current scanning period: If yes, executing the step that the image loading unit reads the current state of the zone bit from the display driving chip; If not, the micro LED display screen performs out-of-order scanning in the current scanning period, and the frame buffer event corresponding to the current state of the flag bit is allowed to be read.
9. 9. The method according to claim 8, wherein in the step of the image loading unit reading the current state of the flag bit from the display driving chip, the state of the flag bit is determined by: before the nth time slice of the current scanning period of the micro LED display screen, allowing reading of a frame buffer area event corresponding to the current state of the marker bit; And after the nth time slice of the current scanning period of the micro LED display screen, allowing writing of a frame buffer event corresponding to the current state of the flag bit.
10. 10. The method according to any one of claims 2 to 9, wherein the frame buffer is in communication with the image loading unit based on a QSPI interface, The second target image data is written to the frame buffer based on a predefined frame format.
11. 11. The method of any of claims 2 to 9, wherein the frame buffer is in communication with an image loading unit based on an MIPI interface, wherein the second target frame image is written to the frame buffer in a frame format determined based on an instruction set of the MIPI interface, wherein the MIPI interface has a TE pin, and wherein the flag bit is created based on the TE pin; And the MIPI interface does not have a TE pin, and the flag bit queries the current state of the flag bit based on a LOW POWER communication mode.
12. 12. The display driving device is characterized by comprising a display driving chip and an image loading unit, wherein the display driving chip comprises a frame buffer area and a zone bit, and the display driving device is used for controlling a display screen and comprises: The image loading unit is used for sending an image writing application instruction to the display driving chip and reading the current state of the marker bit; the frame buffer area is used for executing the read-write process corresponding to the current state of the flag bit; The frame buffer is particularly for Determining a frame buffer area event corresponding to the current state of the flag bit as allowing reading, wherein the frame buffer area sends first target image data to a display screen, and the first target image data is stored in the frame buffer area; And if the frame buffer event corresponding to the current state of the flag bit is determined to be write-enabling, the image loading unit writes second target image data into the frame buffer in response to the image writing application instruction, wherein the second target image data is stored in the image loading unit.
13. 13. The apparatus of claim 12, wherein the device comprises a plurality of sensors, The display driving device is configured to: and if the first target image data is sent completely, switching the frame buffer area event corresponding to the zone bit state from allowing reading to allowing writing.
14. 14. The device of claim 13, wherein the display screen is a micro LED display screen.
15. 15. The apparatus of claim 14, wherein the device comprises a plurality of sensors, The display driving chip is configured to divide the first target image data based on bit planes, the first target image being divided into a plurality of bit plane image data; The step of the frame buffer transmitting the first target image data to the display screen: and the frame buffer area sequentially sends each bit plane image data to the micro LED display screen.
16. 16. The apparatus of claim 15, wherein the device comprises a plurality of sensors, And if the micro LED display screen stops reading the bit plane image data of the frame buffer zone, the first target image data is sent completely.
17. 17. The apparatus of claim 13, wherein the device comprises a plurality of sensors, The display driving device is configured to: and the writing of the second target image data is completed, and a frame buffer event corresponding to the state of the flag bit is switched from the writing permission to the reading permission.
18. 18. The apparatus according to claim 13, wherein The micro LED display screen performs out-of-order scanning: for each scanning period, the frame buffer event corresponding to the current state of the flag bit is initially read-enabled, and the frame buffer event corresponding to the current state of the flag bit is changed to write-enabled until the nth time slice.
19. 19. The apparatus of claim 13, wherein the micro LED display screen scans out of order, performing the following for each micro LED display screen scan cycle: judging that the micro LED display screen sends an image writing application instruction in the current scanning period: If yes, executing the step that the image loading unit reads the current state of the zone bit from the display driving chip; If not, the micro LED display screen performs out-of-order scanning in the current scanning period, and the frame buffer event corresponding to the current state of the flag bit is allowed to be read.
20. 20. The apparatus of claim 19, wherein the device comprises a plurality of sensors, Before the nth time slice of the current scanning period of the micro LED display screen, allowing reading of a frame buffer area event corresponding to the current state of the marker bit; And after the nth time slice of the current scanning period of the micro LED display screen, allowing writing of a frame buffer event corresponding to the current state of the flag bit.

Description

Display driving method, device and display system Technical Field The embodiment of the disclosure relates to the technical field of display, in particular to a display driving method and a display system. Background With the development of display technology, the desire for display devices is increasing. To realize the display of an image, it is necessary to write an image of the current Frame into a Frame Buffer (Frame Buffer), and the micro LED display screen reads the image buffered in the Frame Buffer to perform scanning. In the scanning process, although two Frame buffers (Frame buffers) may be used to improve the processing efficiency, this approach may certainly increase the area of the Frame buffers, which may further increase the overall size of the display driving chip. However, in view of the extremely high requirements of the application scenario of the micro LED display screen on the size of the display driving chip, the design difficulty of the display driving chip is definitely increased by adopting the multi-Frame Buffer mode. Disclosure of Invention Embodiments described herein provide a display driving method, apparatus, and display system, in order to solve some or all of the above problems. In a first aspect, an embodiment of the present application provides a display driving method, which is applied to a display driving device, where the display driving device includes a display driving chip and an image loading unit, the display driving chip includes a frame buffer area and a flag bit, and the display driving device is used for controlling a display screen, and includes: The image loading unit sends an image writing application instruction to the display driving chip; the image loading unit reads the current state of the marker bit from the display driving chip; the frame buffer area executes a read-write process corresponding to the current state of the flag bit; In the step of executing the read-write process corresponding to the current state of the flag bit in the frame buffer area: Determining a frame buffer area event corresponding to the current state of the flag bit as allowing reading, wherein the frame buffer area sends first target image data to a display screen, and the first target image data is stored in the frame buffer area; And if the frame buffer event corresponding to the current state of the flag bit is determined to be write-enabling, the image loading unit writes second target image data into the frame buffer in response to the image writing application instruction, wherein the second target image data is stored in the image loading unit. According to the embodiment of the application, the current state of the frame buffer area is identified by setting the zone bit, and the read-write process of the frame buffer area is constrained based on the current state of the frame buffer area, so that the micro LED display screen can be controlled by utilizing the display driving chip by utilizing the single frame buffer area, the area of the frame buffer area is reduced, the size of the display driving chip is reduced, and the design difficulty of the display driving chip is reduced. One possible design is that the display is a micro LED display. A possible design is that after the step of the frame buffer sending the first target image data to the display screen, the method further comprises: and if the first target image data is sent completely, switching a frame buffer area event corresponding to the state of the flag bit from allowing reading to allowing writing. One possible design is that the display driving chip divides the first target image data based on a bit plane, the first target image being divided into a plurality of bit plane image data; The step of the frame buffer transmitting the first target image data to the display screen: and the frame buffer area sequentially sends each bit plane image data to the micro LED display screen. One possible design is that the first target image data transmission is completed if the micro LED display screen stops reading the bit plane image data of the frame buffer. A possible design is that, in response to the write image application instruction, the image loading unit further includes, after the step of writing second target image data into the frame buffer: and the writing of the second target image data is completed, and a frame buffer event corresponding to the state of the flag bit is switched from the writing permission to the reading permission. One possible design is that, in the step of the image loading unit reading the current state of the flag bit from the display driving chip, The micro LED display screen performs out-of-order scanning, For each scanning period, the frame buffer event corresponding to the current state of the flag bit is initially read-enabled, and the frame buffer event corresponding to the current state of the flag bit is changed to write-enabled until the nth time slice. One possible des