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Gate driver and liquid crystal display including same

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Title: Gate driver and liquid crystal display including same.
Abstract: Provided are a gate-lines driver circuit and a liquid crystal display (LCD) device including the same. The gate-lines driver may be in danger of being subjected to static electricity and it includes: a wiring unit which receives signals from an external source and a circuit unit which outputs driving signals in response to a plurality of control signals received from the wiring unit. The circuit unit includes a plurality of shift registers, each having shift register wirings, wherein the wiring unit includes first through n-th vertical signal lines arranged sequentially in order of distance from the shift registers, with the first vertical signal line being located farthest from the shift registers. The first vertical signal line is connected to each of the shift registers by a first horizontal connection line, and the first horizontal connection line includes a first contact portion which is formed over and contacting with the first signal line and a second contact portion which is located between the n-th vertical signal line and a boundary of the shift registers and is connected to each of the shift registers by a shift register wiring. The first horizontal connection line is structured to reduce a danger that the shift registers will be burned out by a surge of static electricity current received through the wiring unit. ...


Inventors: Kwi-Hyun KIM, Jang-Soo Kim, Hyeong-Jun Jin, Soo-Chul Kim, Kyoung-Hae Min
USPTO Applicaton #: #20120098800 - Class: 345204 (USPTO) - 04/26/12 - Class 345 


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The Patent Description & Claims data below is from USPTO Patent Application 20120098800, Gate driver and liquid crystal display including same.

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This application claims priority from Korean Patent Application No. 10-2010-0102434 filed on Oct. 20, 2010 in the Korean Intellectual Property Office, the disclosure of which application is incorporated herein by reference in its entirety.

BACKGROUND

1. Field of Disclosure

The present disclosure of invention relates to a gate driver structured such that its elements are better protected against being burned by static electricity and a liquid crystal display (LCD) including the gate driver.

2. Description of Related Technology

Generally, a liquid crystal display (LCD) includes a display panel having a plurality of gate lines and a plurality of data lines, a gate driver transmitting a plurality of gate signals to the gate lines, and a data driver transmitting a plurality of data signals to the data lines.

In a conventional LCD, each of the gate driver and data driver is mounted on a display panel in the form of one or more respective IC chips. However, attempts are being made to monolithically integrate at least one of the gate driver and the data driver on a same substrate having the thin-film transistors (TFTs) of the LCD in order to reduce the total size of the display device and to improve productivity and reliability. That is, a gate driver circuit which generates the gate signals of a TFTs-containing substrate is integrally formed on that substrate using an amorphous silicon TFT technology that directly mounts the gate driver circuit on the same glass substrate where the pixels and their respective TFT switching transistors are formed.

However, when a plurality of amorphous silicon TFTs are disposed on a glass or alike substrate to thus integrally form such a gate driver, static electricity generated in manufacturing facilities may flow to a gate driving circuit through an edge of the substrate and undesirably burn out elements of the gate driving circuit. Since the generation of static electricity in the manufacturing facilities cannot be prevented completely, it is desirable to develop a gate driver structured such that its elements are protected against being burned out by static electricity flowing thereto.

It is to be understood that this background of the technology section is intended to provide useful background for understanding the here disclosed technology and as such, the technology background section may include ideas, concepts or recognitions that were not part of what was known or appreciated by those skilled in the pertinent art prior to corresponding invention dates of subject matter disclosed herein.

SUMMARY

Aspects of the present disclosure provide a gate-lines driver circuit structured such that the danger of its elements being burned out by static electricity is reduced.

Aspects of the present disclosure also provide a liquid crystal display (LCD) including the static electricity tolerant gate-lines driver circuit.

According to a more detailed aspect of the present teachings, there is provided a gate-lines driver circuit including: a wiring unit which receives signals from an external source ( ); and a circuit unit which outputs gate lines driving signals in response to a plurality of control signals received from the wiring unit, where the circuit unit includes a plurality of shift registers, each having internal shift register wirings, and wherein the wiring unit includes first through n-th vertical signal lines that are spaced apart and arranged sequentially to thus define an ordering of respective distance from the shift registers, with the first vertical signal line being located farthest away from the shift registers, where n is a natural number, wherein the first signal line is connected to each of the shift registers by a first horizontal connection line, and the first horizontal connection line includes a first contact portion which is formed on the first signal line and a second contact portion which is located between the n-th signal line and the shift registers and is connected to each of the shift registers by a shift register wiring.

According to another aspect of the present disclosure, there is provided a gate driver including: a wiring unit which receives signals from an external source; and a circuit unit which outputs driving signals in response to a plurality of control signals received from the wiring unit and includes a plurality of shift registers, each having shift register wirings, wherein the wiring unit includes first through n-th signal lines arranged sequentially in order of distance from the shift registers, with the first signal line being located farthest from the shift registers, where n is a natural number, wherein the first signal line is connected to each of the shift registers by a shift register wiring extending to the first signal line, at least one of the second through n-th signal lines is divided into two spaced apart sections that have centered between them a line of the shift register wiring, and the two spaced apart sections are electrically connected (bridged) together by a connection line extending insulatively over the line of the shift register and having plural contact portions.

According to another aspect of the present disclosure, there is provided an LCD including a gate driver formed on a substrate, wherein the gate driver includes: a wiring unit which receives signals from an external source; and a circuit unit which outputs driving signals in response to a plurality of control signals received from the wiring unit and includes a plurality of shift registers, each having shift register wirings, wherein the wiring unit includes first through n-th signal lines arranged sequentially in order of distance from the shift registers, with the first signal line being located farthest from the shift registers, where n is a natural number, wherein the first signal line is connected to each of the shift registers by a first connection line, and the first connection line includes a first contact portion which is formed over and contacts the first signal line and a second contact portion which is located between the n-th signal line and the shift registers and is connected thereat to each of the shift registers by a shift register wiring.

According to another aspect of the present disclosure, there is provided an LCD including a gate driver formed on a substrate, wherein the gate driver includes: a wiring unit which receives signals from an external source; and a circuit unit which outputs driving signals in response to a plurality of control signals received from the wiring unit and includes a plurality of shift registers, each having shift register wirings, wherein the wiring unit includes first through n-th signal lines arranged sequentially in order of distance from the shift registers, with the first signal line being located farthest from the shift registers, where n is a natural number, wherein the first signal line is connected to each of the shift registers by a shift register wiring extending to but not directly connecting to the first signal line, at least one of the second through n-th signal lines is divided into two spaced apart sections between which is disposed a line of the shift register wiring, and the two sections are electrically connected together by a connection line extending insulatively over the line of the shift register wiring and having contact portions.

Other aspects of the present teachings will become apparent from the below detailed description.

BRIEF DESCRIPTION OF THE DRAWINGS

The above and other aspects and features of the present disclosure of invention will become more apparent by describing in detail exemplary embodiments thereof with reference to the attached drawings, in which:

FIG. 1 is a plan view of a gate driver and a liquid crystal display (LCD) including the same according to an exemplary embodiment of the present disclosure;

FIG. 2 is an exemplary block diagram illustrating shift registers that constitute the gate driver shown in FIG. 1;

FIG. 3 is an exemplary circuit diagram of a jth shift register shown in FIG. 2;

FIG. 4 is a schematic layout diagram of the gate driver shown in FIG. 1;

FIG. 5 is an exemplary schematic layout diagram of a wiring unit of the gate driver shown in FIG. 1;

FIG. 6 is a cross-sectional view of the wiring unit taken along the line I-I′ of FIG. 5;



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Display apparatus
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Industry Class:
Computer graphics processing, operator interface processing, and selective visual display systems
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stats Patent Info
Application #
US 20120098800 A1
Publish Date
04/26/2012
Document #
13070394
File Date
03/23/2011
USPTO Class
345204
Other USPTO Classes
345 87
International Class
/
Drawings
7



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