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Gate driving circuit and display apparatus having the same

A gate drive circuit and gate signal technology, which is applied in the field of gate drive circuits and display devices, can solve the problems of high temperature reliability degradation of gate drive circuits, etc.

Inactive Publication Date: 2007-12-19
SAMSUNG DISPLAY CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] However, the potential of the Q node floats (floats) for a predetermined time period of the (n-1)H time period
Therefore, when the potential of the Q node is not kept at the cut-off voltage, the pull-up transistor and the load transistor may be turned on, causing ripples in the gate voltage and the load voltage
Specifically, when the current characteristics of pull-up transistors and load transistors vary when testing liquid crystal display panels under high-temperature conditions, gate drive circuits may malfunction due to noise applied through the floating Q-node, causing gate High-temperature reliability degradation of pole drive circuits

Method used

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  • Gate driving circuit and display apparatus having the same
  • Gate driving circuit and display apparatus having the same
  • Gate driving circuit and display apparatus having the same

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Embodiment Construction

[0032] The present invention will be described more fully hereinafter with reference to the accompanying drawings, in which embodiments of the invention are shown. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure is thorough, and will fully convey the scope of the invention to those skilled in the art. In the drawings, the size and relative sizes of layers and regions may be exaggerated for clarity. In the drawings, the same reference numerals denote the same elements.

[0033] It will be understood that when an element or layer is referred to as being on, connected to or coupled to another element or layer, it can be directly on, connected to or coupled to the other element or layer. elements or layers, or intervening elements or layers may be present. In contrast, when an element is referred to as being directly on, or ...

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Abstract

A gate driving circuit and a display apparatus having the gate driving circuit include a pull-up part and a carry part pull up a present gate signal and a present carry signal, respectively, to a first clock during a first period within one frame. A pull-down part receives a next gate signal to discharge the present gate signal to a source power voltage. A pull-up driving part is connected to control terminals of the carry part and pull-up part (Q-node) to turn the carry part and pull-up part on and off. A floating preventing part prevents an output terminal of the carry part from being floated in response to the first clock during a second period within the one frame.

Description

[0001] This application claims priority and benefit from Korean Patent Applications No. 2006-52610 filed on June 12, 2006 and Korean Patent Application No. 2006-131087 filed on December 20, 2006, the disclosures of which are incorporated by reference for all purposes at Here, as proposed here. technical field [0002] The invention relates to a gate drive circuit and a display device with the gate drive circuit. More particularly, the present invention relates to a gate driving circuit whose reliability can be improved during high temperature operation and a display device having the gate driving circuit. Background technique [0003] Generally, a liquid crystal display device includes a liquid crystal display panel for displaying images, the liquid crystal display panel having a lower substrate, an upper substrate facing the lower substrate, and a liquid crystal layer interposed between the upper and lower substrates. [0004] A liquid crystal display panel includes a plur...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G09G3/36G09G3/20
CPCG09G3/3677G09G2310/0278G09G2310/08H03K19/01742
Inventor 金圣万李洪雨安炳宰宋永杰李奉俊文然奎金景旭徐珍淑
Owner SAMSUNG DISPLAY CO LTD
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