Patent ID: 8659539
Filing Date: 2014-02-25
Classification: G09G

Abstract:
1. A power-saving method adapted in a multi-mode display device, wherein the power-saving method comprises the steps of: detecting a brightness of an ambient light; operating the multi-mode display device in a transmissive mode and enabling a backlight module of the multi-mode display when the brightness of the ambient light lies within a transmissive range; operating the multi-mode display device in a transflective mode and dynamically adjusting a backlight brightness of the backlight module of the multi-mode display according to a compensation method when the brightness of the ambient light lies within a transflective range, wherein the backlight brightness is dynamically adjusted according to the compensation method based on the brightness of the ambient light, a brightness look-up table and control of a high-state width ratio of a pulse width modulation signal such that when the brightness of the ambient light is represented as x, the backlight brightness provided by the backlight module according to a high-state width ratio is represented as y and a displayed brightness of a panel module of the multi-mode display device is represented as a function f(x, y), the function f(x, y) is expressed as: and operating the multi-mode display device in a reflective mode and turning off the backlight module when the brightness of the ambient light lies within a reflective range.