Patent ID: 11929041
Assignee: HIMAX TECHNOLOGIES LIMITED
Field: Audio-visual technology (Electrical engineering)
Classification: CPC G | IPC G

Claim 8:
9. A local dimming control method for a display apparatus having an LCD panel and a backlight module with a plurality of backlight zones, the local dimming control method comprising:
generating a local dimming data signal for the backlight module and compensated pixel data for a LCD panel based on image data and an arrangement of the backlight zones of a backlight module associated with the LCD panel, the image data having a plurality of image areas respectively corresponding to the backlight zones;
determining whether a first image area of the image areas is a low-luminance image area; and
in response to a determination that the first image area is a low-luminance image area and a luminance intensity of a first backlight zone of the backlight zones corresponding to the first image area is less than a luminance intensity of a second backlight zone corresponding to a second image area of the image areas neighboring the first image area, performing first pixel compensation for high-luminance pixels in the second image area by multiplying a first gray level of the high-luminance pixels in the second image area with a first compensation gain, and performing second pixel compensation for low-luminance pixels in the second image area by multiplying a second gray level of the low-luminance pixels in the second image area with a second compensation gain which is greater than the first compensation gain, wherein the second compensation gain is positively correlated with the number of high-luminance pixels in the second image area.