Patent ID: 9704427
Date: 2017-07-11
CPC Classifications: G09G,H04N

Claim:
1. A method for adjusting grayscale brightness, applicable to a 3D display device, the method comprising: determining an initial gray level corresponding to a preceding frame, and a target gray level corresponding to a current frame, for a backlight zone corresponding to a zone of a display image; determining whether the target gray level is less than a first threshold gray level or greater than a second threshold gray level, wherein the first threshold gray level is less than the second threshold gray level; and if not, then in response to determining the target gray level is not less than the first threshold gray level and not greater than the second threshold gray level, adjusting the grayscale brightness of the backlight zone through over-voltage driving, in response to determining the target gray level is less than the first threshold gray level or greater than the second threshold gray level, determining a value of an adjustment parameter corresponding to the initial gray level and the target gray level according to a preset backlight brightness adjustment table, and adjusting backlight brightness of the current frame according to the determined value of the adjustment parameter so that grayscale brightness of the current frame substantially equals grayscale brightness corresponding to the target gray level, wherein the adjustment parameter is a duty cycle of backlight or a reference current of backlight.