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US 7,612,788 B2Granted
Driving multiple sub-pixels from single gray scale data
AssigneeSamsung Electronics Co., Ltd.
InventorsIl-Kwon Chang, Yong-Weon Jeon
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Abstract
For generating source line voltages in a display device, gray scale data is received at a source driver for a first sub-pixel of a pixel. The source driver generates a first source line voltage for the first sub-pixel and a second source line voltage for a second sub-pixel from the gray scale data of the first sub-pixel. Thus, data transfer rate and/or data buses are minimized for in turn minimizing power consumption and EMI (electromagnetic interference).
Claims30
A method of generating source line voltages in a display device, comprising:
- receiving by a source driver gray scale data for a first sub-pixel of a pixel having the first sub-pixel and a second sub-pixel;
- wherein the source driver receives the gray scale data for the first sub-pixel during a one line time period while the source driver does not receive any gray scale information for the second sub-pixel during any portion of the one line time period;
- generating by the source driver a first source line voltage for the first sub-pixel from the gray scale data during a first portion of said one line time period;
- and
- generating by the source driver a second source line voltage for the second sub-pixel of the pixel from the gray scale data of the first sub-pixel during a second portion of said one line time period such that the second source line voltage of the second sub-pixel becomes determined at the source driver during the second portion of said one line time period,
- wherein said one line time period is for a time length when a polarity signal remains constant during said time length,
- and wherein the polarity signal alternates between high and low logic states after each of said time length.
4 more elements
A source driver of a display device, the source driver comprising:
- a storage unit for receiving and storing gray scale data for a first sub-pixel of a pixel having the first sub-pixel and a second sub-pixel;
- wherein the source driver receives the gray scale data for the first sub-pixel during a one line time period while the source driver does not receive any gray scale information for the second sub-pixel during any portion of the one line time period;
- and
- a source line voltage generator for generating a first source line voltage for the first sub-pixel from the gray scale data during a first portion of said one line time period, and for generating a second source line voltage for the second sub-pixel of the pixel from the gray scale data of the first sub-pixel during a second portion of said one line time period such that the second source line voltage of the second sub-pixel becomes determined at the source driver during the second portion of said one line time period,
- wherein said one line time period is for a time length when a polarity signal remains constant during said time length,
- and wherein the polarity signal alternates between high and low logic states after each of said time length.
3 more elements
A display device comprising:
- a display panel having a plurality of gate lines and source lines;
- gate drivers for generating scan signals of the gate lines;
- and
- source drivers for generating source line voltages of the source lines, each source driver comprising:
- a storage unit for receiving and storing gray scale data for a first sub-pixel of a pixel having the first sub-pixel and a second sub-pixel;
- wherein the source driver receives the gray scale data for the first sub-pixel during a one line time period while the source driver does not receive any gray scale information for the second sub-pixel during any portion of the one line time period;
- and
- a source line voltage generator for generating a first source line voltage for the first sub-pixel from the gray scale data during a first portion of said one line time period, and for generating a second source line voltage for the second sub-pixel of the pixel from the gray scale data of the first sub-pixel during a second portion of said one line time period such that the second source line voltage of the second sub-pixel becomes determined at the source driver during the second portion of said one line time period,
- wherein said one line time period is for a time length when a polarity signal remains constant during said time length,
- and wherein the polarity signal alternates between high and low logic states after each of said time length.
7 more elements
Dependencies are inferred from the claim text.