Image display method, DDIC chip, AP, display screen module, and terminal
View Patent ↗Provided are an image display method, a display driver integrated circuit (DDIC) chip, an application processor (AP), a display screen module, and a terminal. The method is applied in the DDIC chip. The method includes: performing image scanning based on first image frame data issued by an AP, and performing frame compensation; stopping, in response to a compensation-stopping instruction issued by the AP, the frame compensation and waiting for the AP to issue image frame data, the compensation-stopping instruction being used to instruct the AP to prepare to issue new image frame data; and performing, in response to receiving second image frame data issued by the AP, image scanning based on the second image frame data and resuming the frame compensation.
1. An image display method, applied in a display driver integrated circuit (DDIC) chip of a display screen, the method comprising:
performing image scanning based on first image frame data issued by an application processor (AP), and performing frame compensation;
stopping, in response to a compensation-stopping instruction issued by the AP, the frame compensation and waiting for the AP to issue image frame data, the compensation-stopping instruction being used to instruct the AP to prepare to issue new image frame data; and
performing, in response to receiving second image frame data issued by the AP, image scanning based on the second image frame data and resuming the frame compensation.
2. The method according to claim 1 , wherein said stopping, in response to the compensation-stopping instruction issued by the AP, the frame compensation and waiting for the AP to issue the image frame data comprises:
in response to receiving the compensation-stopping instruction issued by the AP during the frame compensation and subsequent to an end of a low level of a tearing effect (TE) signal, stopping next frame compensation, wherein the frame compensation is performed during the low level of the TE signal; and
reporting, during said waiting for the AP to issue the image frame data, the TE signal to the AP in a predetermined manner, the predetermined manner being used to reduce a delay in issuing the image frame data by the AP.
3. The method according to claim 2 , wherein the TE signal is reported by the DDIC chip to the AP at a first frequency during the image scanning and the frame compensation; and
wherein said reporting, during said waiting for the AP to issue the image frame data, the TE signal to the AP in the predetermined manner comprises:
reporting, during said waiting for the AP to issue the image frame data, the TE signal to the AP at a second frequency, the second frequency being higher than the first frequency, and the AP being configured to issue the image frame data in response to detecting a rising edge of the TE signal.
4. The method according to claim 3 , wherein an emission (EM) frequency of the DDIC chip is an integer multiple of the second frequency.
5. The method according to claim 2 , wherein the TE signal is reported by the DDIC chip to the AP at a first frequency during the image scanning and the frame compensation; and
wherein said reporting, during said waiting for the AP to issue the image frame data, the TE signal to the AP in the predetermined manner comprises:
reporting, during said waiting for the AP to issue the image frame data, a sustaining high-level TE signal to the AP, the AP being configured to issue the image frame data in response to detecting a high level of the TE signal.
6. The method according to claim 5 , wherein said performing, in response to receiving the second image frame data issued by the AP, the image scanning based on the second image frame data and resuming the frame compensation comprises:
in response to receiving the second image frame data issued by the AP within a maximum duration of the sustaining high-level TE signal, performing the image scanning based on the second image frame data and resuming the frame compensation, and
wherein the method further comprises:
in response to receiving no second image frame data issued by the AP within the maximum duration of the sustaining high-level TE signal, resuming the frame compensation.
7. The method according to claim 6 , wherein the maximum duration is a single frame duration corresponding to the first frequency.
8. The method according to claim 1 , wherein the display screen is an organic light-emitting diode (OLED) display screen or a low temperature polycrystalline oxide (LTPO) display screen.
9. The method according to claim 1 , being applied in the DDIC chip of the display screen in a mobile terminal.
10. A display driver integrated circuit (DDIC) chip, applied in a display screen, the DDIC chip being configured to:
perform image scanning based on first image frame data issued by an application processor (AP) and perform frame compensation;
stop the frame compensation and wait for the AP to issue image frame data in response to a compensation-stopping instruction issued by the AP, the compensation-stopping instruction being used to instruct the AP to prepare to issue new image frame data; and
perform image scanning based on second image frame data and resume the frame compensation in response to receiving the second image frame data issued by the AP.
11. The DDIC chip according to claim 10 , being further configured to:
in response to receiving the compensation-stopping instruction issued by the AP during the frame compensation and subsequent to an end of a low level of a tearing effect (TE) signal, stop next frame compensation, wherein the frame compensation is performed during the low level of the TE signal; and
report, during waiting for the AP to issue the image frame data, the TE signal to the AP in a predetermined manner, the predetermined manner being used to reduce a delay in issuing the image frame data by the AP.
12. The DDIC chip according to claim 11 , being further configured to report the TE signal to the AP at a first frequency during the image scanning and the frame compensation, wherein the DDIC chip is further configured to:
report, during waiting for the AP to issue the image frame data, the TE signal to the AP at a second frequency, the second frequency being higher than the first frequency, and the AP being configured to issue the image frame data in response to detecting a rising edge of the TE signal.
13. The DDIC chip according to claim 12 , wherein an emission (EM) frequency of the DDIC chip is an integer multiple of the second frequency.
14. The DDIC chip according to claim 11 , being further configured to report the TE signal to the AP at a first frequency during the image scanning and the frame compensation, wherein the DDIC chip is further configured to:
report, during waiting for the AP to issue the image frame data, a sustaining high-level TE signal to the AP, the AP being configured to issue the image frame data in response to detecting a high level of the TE signal.
15. The DDIC chip according to claim 14 , being further configured to:
in response to receiving second image frame data issued by the AP within a maximum duration of the sustaining high-level TE signal, perform the image scanning based on the second image frame data and resume the frame compensation; and
in response to receiving no second image frame data issued by the AP within the maximum duration of the sustaining high-level TE signal, resume the frame compensation.
16. The DDIC chip according to claim 15 , wherein the maximum duration is a single frame duration corresponding to the first frequency.
17. The DDIC chip according to claim 10 , being a DDIC chip in an organic light emitting diode (OLED) display screen or a low temperature polycrystalline oxide (LTPO) display screen.
18. The DDIC chip according to claim 10 , being a DDIC chip in the display screen in a mobile terminal.
19. An application processor (AP), electrically connected to a display driver integrated circuit (DDIC) chip of a display screen, the AP being configured to:
issue first image frame data to the DDIC chip, the DDIC chip being configured to perform image scanning based on the first image frame data and perform frame compensation;
issue a compensation-stopping instruction to the DDIC chip, the compensation-stopping instruction being used to instruct the AP to prepare to issue new image frame data, and the DDIC chip being further configured to stop the frame compensation and wait for the AP to issue image frame data based on the compensation-stopping instruction; and
issue second image frame data to the DDIC chip, the DDIC chip being further configured to perform the image scanning based on the second image frame data and resume the frame compensation.
20. The AP according to claim 19 , being further configured to:
generate the compensation-stopping instruction during image synthesis through a layer synthesizer; and
issue the compensation-stopping instruction to the DDIC chip during a next low level of a tearing effect (TE) signal.