Source driver, operatoin method thereof and driving circuit using the same
AssigneeNovatek Microelectronics Corp.
InventorsKuo-Che Hong, Ji-Ting Chen
Life of this patent
Estimating the term…
Abstract
A source driver, an operation method thereof and a driving circuit using the same are provided. The source driver includes a gamma voltage generating circuit, a first voltage buffer and a reference voltage driving circuit. The gamma voltage generating circuit receives an inter reference voltage to provide a first gray level reference voltage corresponding to a first display gray level. The first voltage buffer is used for receiving the first gray level reference voltage to provide a driving voltage. The reference voltage driving circuit is coupled to the gamma voltage generating circuit and the first voltage buffer and used for accelerating rising speed or falling speed of the first gray level reference voltage.
Claims29
A source driver comprising:
- a gamma voltage generating circuit, receiving an inter reference voltage to provide a first gray level reference voltage corresponding to a first display gray level;
- a first voltage buffer, receiving the first gray level reference voltage to provide a driving voltage;
- and
- a reference voltage driving circuit, coupled to the gamma voltage generating circuit and the first voltage buffer to accelerate a rising speed or a falling speed of the first gray level reference voltage.
An operation method of a source driver, comprising:
- receiving an inter reference voltage by a gamma voltage generating circuit, to provide a first gray level reference voltage corresponding to a first display gray level;
- receiving the first gray level reference voltage by a first voltage buffer, to provide a driving voltage;
- and
- accelerating a rising speed or a falling speed of the first gray level reference voltage by a reference voltage driving circuit.
A driving circuit, used for driving a display panel, comprising:
- a timing controller, used to provide a display data;
- a gamma voltage generating circuit, receiving an inter reference voltage to provide a first gray level reference voltage corresponding to a first display gray level;
- a first voltage buffer, receiving the first gray level reference voltage to provide a driving voltage;
- a reference voltage driving circuit, coupled to the gamma voltage generating circuit and the first voltage buffer, to accelerate a recovering or a change of a voltage level of the first gray level reference voltage;
- and
- a voltage selection switch, wherein an input terminal of the voltage selection switch receives the first gray level reference voltage provided from the gamma voltage generating circuit, an output terminal of the voltage selection switch provides the first gray level reference voltage to the first voltage buffer, wherein the voltage selection switch is conducted when a gray level corresponding to the display data is same as the first display gray level.
Dependencies are inferred from the claim text.