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Gate driver and liquid crystal display including same




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. ...


USPTO Applicaton #: #20120098800
Inventors: Kwi-hyun Kim, Jang-soo Kim, Hyeong-jun Jin, Soo-chul Kim, Kyoung-hae Min


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

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

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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

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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

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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;

FIG. 7 is a layout diagram of a wiring unit of a gate driver according to another exemplary embodiment of the present disclosure; and

FIG. 8 is a cross-sectional view of the wiring unit taken along the line II-II′ of FIG. 7.

DETAILED DESCRIPTION

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Advantages and features of the present teachings may be understood more readily by reference to the following detailed description of exemplary embodiments and the accompanying drawings. The present teachings may, however, be embodied in many different forms and should not be construed as being limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete and will fully convey the concepts of the present teachings to those skilled in the corresponding art. In the drawings, sizes and relative sizes of layers and regions may be exaggerated for clarity.

It will be understood that when an element or layer is referred to as being “on” another element or layer, the element or layer can be directly on another element or layer or intervening elements or layers may also be present. In contrast, when an element is referred to as being “directly on” another element or layer, there are no intervening elements or layers present. As used herein, the term “and/or” includes any and all combinations of one or more of the associated listed items.

Spatially relative terms, such as “below”, “beneath”, “lower”, “above”, “upper”, and the like, may be used herein for ease of description to describe one element or feature\'s relationship to another element(s) or feature(s) as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations of the device in use or operation, in addition to the orientation depicted in the figures. Like reference numerals refer to like elements throughout the specification.

Embodiments in accordance with the disclosure are described herein with reference to plan and cross-section illustrations that are schematic illustrations of idealized embodiments. As such, variations from the shapes of the illustrations as a result, for example, of manufacturing techniques and/or tolerances, are to be expected. Thus, embodiments should not be construed as limited to the particular shapes of regions illustrated herein but are to include deviations in shapes that result, for example, from manufacturing. Thus, the regions illustrated in the figures are schematic in nature and their shapes are not intended to illustrate the actual shape of a region of a device and are not intended to limit the scope of the present disclosure.




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stats Patent Info
Application #
US 20120098800 A1
Publish Date
04/26/2012
Document #
File Date
12/31/1969
USPTO Class
Other USPTO Classes
International Class
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Drawings
0




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20120426|20120098800|gate driver and liquid crystal display including same|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 |