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US 2010/0302230 A1Published application
Liquid crystal display device
AssigneeLG Display Co., Ltd.
InventorsKyo Ho Moon, Chul Gu Lee, Hoon Choi, Yong Soo Cho, Sang Kug Han
Life of this patent
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Abstract
An LCD device includes dual gate transistors provided to an output portion of the shift register for outputting a gate voltage. As such, the charge/discharge time of the output portion is reduced so the response time of liquid crystal is improved.
Claims18
A liquid crystal display device comprising:
- a display panel displaying an image and including a plurality of gate lines and a plurality of data lines arranged thereon;
- a data driver supplying the data lines of the display panel with data signals corresponding to the image;
- and
- a gate driver formed on the display panel and having a plurality of shift registers sequentially shifting a start pulse to be applied to the gate lines, each of the shift registers including:
- an output portion with first and second dual gate transistors, wherein the first dual gate transistor is configured to include:
- first and second gate electrodes responsive to a voltage on a first node;
- a drain electrode receiving a clock signal;
- and a source electrode connected to the respective gate line and to selectively apply the clock signal on the drain electrode to the respective gate line according to the voltage on the first node, and the second dual gate transistor is configured to include:
- first and second gate electrodes responsive to a voltage on a second node;
- a source electrode receiving a first source voltage;
- and a drain electrode connected to the respective gate line and to selectively apply the first source voltage to the respective gate line according to the voltage on the second node;
- and
- a control portion controlling the voltages on the first and second nodes.
10 more elements
A liquid crystal display device comprising:
- a display panel displaying an image and including a plurality of gate lines and a plurality of data lines arranged thereon;
- a data driver supplying the data lines of the display panel with data signals corresponding to the image;
- and
- a gate driver formed on the display panel and having a plurality of shift registers sequentially shifting a start pulse to be applied to the gate lines, each of the shift registers including:
- an input portion with first and second dual source transistors, wherein the first dual source transistor is configured to include:
- a gate electrode responsive to the start pulse;
- a drain electrode receiving a first source voltage;
- and first and second source electrodes connected to a first node, and the second dual source transistor is configured to include:
- a gate electrode responsive to an output signal of the next shift register;
- a drain electrode connected to the first node;
- and first and second source electrodes receiving a second source voltage;
- an output portion with first and second dual gate transistors, wherein the first dual gate transistor is configured to include:
- first and second gate electrodes responsive to a voltage on the first node;
- a drain electrode receiving a clock signal;
- and a source electrode connected to the respective gate line and to selectively apply the clock signal on the drain electrode to the respective gate line according to the voltage on the first node, and the second dual gate transistor is configured to include:
- first and second gate electrodes responsive to a voltage on a second node;
- a source electrode receiving the second source voltage;
- and a drain electrode connected to the respective gate line and to selectively apply the second source voltage to the respective gate line according to the voltage on the second node;
- and
- a control portion disposed between the input and output portions and configured to control the voltages on the first and second nodes.
17 more elements
Dependencies are inferred from the claim text.