Patent ID: 8884866
Filing Date: 2014-11-11
Classification: G09G

Abstract:
1. A backlight brightness control method for adjusting a backlight brightness for a display of an electronic apparatus, wherein the method comprises: (a) detecting an ambient brightness of the electronic apparatus to output an ambient brightness signal; (b) determining whether to adjust the backlight brightness for the display according to a comparison between a target brightness and a current backlight brightness of the display; (c) selecting an adjustment value if the result of the comparison in step (b) is that the backlight brightness should be adjusted, (d) adjusting the backlight brightness of the display according to the current backlight brightness and the adjustment value, wherein the first step size is used to decrease the pulse width of a PWM drive signal for a backlight of the display one or more times until the current backlight brightness is smaller than a signal threshold and the second step size is used to decrease the pulse width of the PWM drive signal one or more times until the current backlight brightness becomes smaller than the decrement threshold.