Data driver for reducing data transmission, display device, and data driving method
AssigneeLG Display Co., Ltd.
InventorsTaeYoung Jung, JoungTae Kim, ChangKun Kim
Life of this patent
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Abstract
Provided is a data driver, a driving method of the data driver, and a display device. The data driver includes a latch unit configured to store n-bit image data, wherein n≥2; a conversion unit configured to convert N-bit digital data including the n-bit image data and variable m-bit pseudo control data into an analog voltage and then output the analog voltage, wherein m≥1; and an output unit configured to output a data voltage based on the analog voltage. The data driver is capable of supplying a high image quality based on N-bit digital data with a small circuit size that is based on n-bit image data.
Claims10
A data driver comprising:
- a receiver configured to receive, from a timing controller, p-bit image data for each of a plurality of channels each corresponding to a sub-pixel, wherein p is a positive integer;
- a plurality of p-bit latches each configured to store the p-bit image data of a corresponding channel among the plurality of channels, wherein p≥2 and p<N;
- and
- a plurality of convertors configured to add variable m-bit pseudo control data to the p-bit image data of the corresponding channel among the plurality of channels to generate resultant N-bit digital image data and convert the resultant N-bit digital image data into an analog voltage and then output the analog voltage, wherein m≥1 and N is a positive integer,
- wherein the p-bit digital image data for each channel among the plurality of channels is specific to the corresponding channel,
- wherein the variable m-bit pseudo control data is common to each of the plurality of channels, and
- wherein the variable m-bit pseudo control data is generated based on:
- i) at least part of original N-bit digital input image data of the corresponding channel, ii) information about a corresponding frame, or iii) information about a corresponding sub-pixel row.
A data driving method of a data driver, the method comprising:
- receiving, from a timing controller, p-bit image data for each of a plurality of channels each corresponding to a sub-pixel, wherein p is a positive integer;
- storing, via a p-bit latch, the p-bit image data of a corresponding channel among the plurality of channels, wherein p≥2;
- and
- adding variable m-bit pseudo control data to the p-bit image data of the corresponding channel among the plurality of channels to generate resultant N-bit digital image data and converting the resultant N-bit digital image data into an analog voltage and then outputting the analog voltage, wherein m≥1 N is a positive integer, and p<N,
- wherein the p-bit digital image data for each channel among the plurality of channels is specific to the corresponding channel,
- wherein the variable m-bit pseudo control data is common to each of the plurality of channels, and
- wherein the variable m-bit pseudo control data is generated based on:
- i) at least part of original N-bit digital input data of the corresponding channel, ii) information about a corresponding frame, or iii) information about a corresponding sub-pixel row.
Dependencies are inferred from the claim text.