Pre-emphasis circuit, method and display device
AssigneesBeijing ESWIN Computing Technology Co., Ltd., Hefei ESWIN IC Technology Co., Ltd.
InventorsSangmin Park, Jangjin Nam
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Abstract
The present disclosure provides a pre-emphasis circuit, method and display device, and belongs to a field of display driving. The pre-emphasis circuit according to the disclosure can determine whether to output a pre-emphasis voltage corresponding to grayscale of current input data via an input terminal of an amplifier according to data input to a data terminal by adding an amplifier input pre-emphasis module. Rapid conversion of output voltage can be realized without increasing the quiescent current of the amplifier, while the stability of temperature of the IC is ensured.
Claims20
A pre-emphasis circuit, comprising:
- a first latch configured to receive and store first data and output the first data;
- a second latch configured to receive and store second data and output the second data, the second data being next to the first data;
- a decoder;
- a gamma voltage supplier;
- a first level shifter configured to boost the first data, high-voltage data signal obtained through the boosting being used as current input data of the decoder;
- and
- an amplifier input pre-emphasis module connected to the gamma voltage supplier, the decoder, an input pre-emphasis signal terminal, the first latch and the second latch, and configured to determine whether to pre-emphasize gray-scale voltage corresponding to the current input data according to a value of a designated bit of the first data and a value of a designated bit of the second data, an input pre-emphasis signal value input via the input pre-emphasis signal terminal, and a gray-scale value corresponding to the current input data;
- wherein, if it is determined that the gray-scale voltage corresponding to the current input data is to be pre-emphasized, a pre-emphasis voltage is output to the decoder, the pre-emphasis voltage being a voltage obtained by pre-emphasizing the gray-scale voltage corresponding to the current input data;
- and
- if it is determined that the gray-scale voltage corresponding to the current input data is not to be pre-emphasized, the gray-scale voltage corresponding to the current input data is output to the decoder.
A pre-emphasis device, comprising:
- a first processing module configured to receive and store first data and second data, the second data being next to the first data;
- and
- a second processing module configured to determine whether to pre-emphasize gray-scale voltage corresponding to current input data according to a value of a designated bit of the first data and a value of a designated bit of the second data, an input pre-emphasis signal value input via an input pre-emphasis signal terminal, and a gray-scale value corresponding to the current input data;
- the second processing module is further configured to:
- output a pre-emphasis voltage, which is a voltage obtained by pre-emphasizing the gray-scale voltage corresponding to the current input data, if it is determined that the gray-scale voltage corresponding to the current input data is to be pre-emphasized;
- and
- output the gray-scale voltage corresponding to the current input data, if it is determined that the gray-scale voltage corresponding to the current input data is not to be pre-emphasized.
Dependencies are inferred from the claim text.