Liquid crystal display and driving method thereof
AssigneeAu Optronics Corporation
InventorsChih-Che Hsu, Li-Ru Lyu
Life of this patent
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Abstract
A liquid crystal display and a driving method thereof. The liquid crystal display includes a liquid crystal display panel, a backlight module, a dimming control unit and a backlight module driving circuit. The liquid crystal display panel has a first display area and a second display area. The backlight module includes a plurality of lighting devices respectively corresponding to pixels in the first display area and the second display area. The dimming control unit generates at least one dimming control signal having a dimming frequency which is a multiple of a frame rate of the liquid crystal display panel. The backlight module driving circuit periodically drives the lighting devices in sequence according to the dimming control signal.
Claims20
A liquid crystal display, comprising:
- a liquid crystal display panel having a first display area and a second display area;
- a backlight module, which comprises a plurality of lighting devices respectively corresponding to pixels in the first display area and the second display area;
- a dimming control unit for generating at least one dimming control signal having a dimming frequency, which is a multiple of a frame rate of the liquid crystal display panel;
- and
- a backlight module driving circuit for periodically driving the lighting devices in sequence according to the at least one dimming control signal.
A driving method adopted in a liquid crystal display comprising a liquid crystal display panel, a backlight module driving circuit and a backlight module, the liquid crystal display panel having a first display area and a second display area, the backlight module comprising a plurality of lighting devices, the driving method comprising the steps of:
- utilizing a dimming control unit to output at least one dimming control signal having a dimming frequency which is a multiple of a frame rate of the liquid crystal display panel;
- adjusting a phase of the at least one dimming control signal to delay the at least one dimming control signal by a period of delay time, and then outputting the at least one delayed dimming control signal to the backlight module driving circuit;
- and
- utilizing the backlight module driving circuit to periodically drive the lighting devices in sequence according to the at least one delayed dimming control signal,
- wherein a part of the driven lighting devices corresponds to pixels in the first display area or the second display area.
Dependencies are inferred from the claim text.