LCD display and backlight apparatus and driving method thereof
AssigneeChimei Innolux Corporation
InventorsChou Ching-Hui, Mao Li-Wei
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Abstract
The backlight apparatus includes a light source module having a plurality of light sources connected in series, and a power supply module which generates a driving signal for driving the light source module according a synchronous control signal. A first switch is disposed between the light source module and power supply module, or between a last light source in the light source module and a reference voltage level. The first switch is turned on or off according to the synchronous control signal. In addition, a second switch determines whether or not to couple a function terminal of the power supply module to the reference voltage level to disable the driving signal without power off according to the synchronous control signal.
Claims13
A backlight apparatus, comprising:
- a light source module, having a plurality of light sources connected in series;
- a power supply module for generating a driving signal according to a synchronous control signal, wherein the driving signal is configured to drive the light source module to emit light;
- a first switch, disposed between a last light source in the light source module and a reference voltage level, wherein the first switch is configured to turn on or off according to the synchronous control signal;
- and
- a second switch, for determining whether or not to couple a special function terminal of the power supply module to the reference voltage level in order to disable the driving signal without power off the power supply module according to the synchronous control signal.
A backlight apparatus, comprising:
- a light source module, having a plurality of light sources connected in series;
- a power supply module, for generating a driving signal according to a synchronous control signal for driving the light source module;
- a first switch, disposed between a first light source of the light source module and the power supply module, wherein the first switch is configured to pass the driving signal to the light source module according to the synchronous control signal;
- and
- a second switch, for determining, according to the synchronous control signal, whether or not to couple a function terminal of the power supply module to a reference voltage level in order to disable the driving signal.
A driving method of a backlight apparatus, wherein the backlight apparatus has a plurality of light sources and a power supply module, and the driving method comprises:
- generating a synchronous control signal;
- providing a reference voltage level:
- generating a driving signal, wherein the light sources are driven according to the voltage difference between the voltage level of the driving signal and the reference voltage level;
- determining whether or not to conduct the driving signal to the light sources according to the synchronous control signal;
- and
- determining, according to the synchronous control signal, whether or not to disable the driving signal without powering off the power supply module.
Dependencies are inferred from the claim text.