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US 8,077,131 B2Granted
Liquid crystal display and method of driving the same for improving luminance uniformity
AssigneeChimei Innolux Corporation
InventorsChih-Tsung Kang, Chi-Ting Huang
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Abstract
In a liquid crystal display or panel and a method of driving the same, in response to the receipt of a plurality of image control signals each intended for one of the data lines, the image control signals are modified in accordance with different characteristics of the data lines. The modified image control signals are outputted to the respective data lines to drive the liquid crystal display or panel.
Claims18
A method of driving a liquid crystal panel in response to a plurality of image control signals being transmitted to a plurality of pixels in said liquid crystal panel via a plurality of source driver units and a plurality of data lines respectively connected with the source driver units, said method comprising the steps of:
- providing a white-tracking code;
- applying a plurality of different first weights to said white-tracking code to obtain a plurality of weighted white-tracking codes, each of said first weights being associated with one of the data lines;
- providing an over-driving value;
- applying a plurality of different second weights to said over-driving value to obtain a plurality of weighted over-driving values, each of said second weights being associated with one of the data lines;
- for each of said data lines, selecting and outputting one of said weighted white-tracking codes and one of said weighted over-driving values to the corresponding source driver unit to adjust said image control signals inputted to the pixels associated with said data line;
- multiplexing the weighted white-tracking codes;
- multiplexing the weighted over-driving values;
- and
- sending the multiplexed weighted white-tracking codes and the multiplexed weighted over-driving values to said source driver units so as to adjust said image control signals inputted to said pixels.
6 more elements
A liquid crystal display, comprising:
- a liquid crystal panel having a plurality of data lines and a plurality of corresponding pixels;
- a plurality of source driver units coupled to said data lines, respectively;
- and
- an image processor coupled to said source driver units for:
- receiving a plurality of image control signals,
- modifying the image control signals to obtain a plurality of modified image control signals in accordance with different characteristics of said data lines, and
- outputting said modified image control signals to said source driver units, respectively;
- wherein said image processor comprises:
- a white-tracking code generator for providing a white-tracking code;
- a weighted white-tracking code generator coupled to said white-tracking code generator for generating a plurality of different weighted white-tracking codes each of which is based on the characteristic of one of the data lines;
- a first multiplexer coupled to said weighted white-tracking code generator for receiving and selectively outputting said different weighted white-tracking codes;
- an over-driving value generator coupled to said first multiplexer and for providing an over-driving value;
- a weighted over-driving value generator coupled to said over-driving value generator for generating a plurality of different weighted over-driving values each of which is based on the characteristic of one of the data lines;
- a second multiplexer coupled to said weighted over-driving value generator for receiving and selectively outputting said different weighted over-driving values;
- and a line selector coupled to said first multiplexer and said second multiplexer for selecting one of said weighted white-tracking codes and one of said weighted over-driving values to modify the image control signal of each of said data lines.
12 more elements
A liquid crystal display, comprising:
- a liquid crystal panel having a plurality of data lines and a plurality of corresponding pixels;
- a plurality of source driver units coupled to said data lines, respectively;
- and
- an image processor coupled to said source driver units for:
- receiving a plurality of image control signals,
- modifying the image control signals to obtain a plurality of modified image control signals in accordance with different characteristics of said data lines, and
- outputting said modified image control signals to said source driver units, respectively;
- wherein said image processor comprises:
- a white-tracking code generator for providing a white-tracking code;
- a weighted white-tracking code generator coupled to said white-tracking code generator for generating a plurality of different weighted white-tracking codes each of which is based on the characteristic of one of the data lines;
- an over-driving value generator for providing an over-driving value;
- a weighted over-driving value generator coupled to said weighted white-tracking code generator and said over-driving value generator and for generating a plurality of different weighted over-driving values each of which is based on the characteristic of one of the data lines and corresponds to one of said weighted white-tracking codes;
- a multiplexer coupled to said weighted over-driving value generator for receiving and selectively outputting said weighted white-tracking codes and said corresponding weighted over-driving values;
- and
- a line selector coupled to said multiplexer for selecting one of said weighted white-tracking codes and one of said corresponding weighted over-driving values to modify the image control signal of each of said data lines.
12 more elements
A method of driving a liquid crystal display, said liquid crystal display comprising a plurality of source driver units and a plurality of data lines connected therewith, said method comprising the steps of:
- receiving a plurality of image control signals each intended for one of the data lines;
- modifying said image control signals to obtain a plurality of modified image control signals in accordance with different characteristics of said data lines;
- and
- outputting said modified image control signals to the respective data lines to drive said liquid crystal display,
- wherein said modifying comprises:
- providing a white-tracking code;
- generating a plurality of different weighted white-tracking codes each of which is based on the characteristic of one of the data lines;
- receiving and selectively outputting said weighted white-tracking codes;
- providing an over-driving value;
- generating a plurality of different weighted over-driving values each of which is based on the characteristic of one of the data lines;
- receiving and selectively outputting said weighted over-driving values;
- and
- selecting one of said weighted white-tracking codes and one of said weighted over-driving values to modify the image control signal of each of said data lines.
10 more elements
Dependencies are inferred from the claim text.