LCD Monitor

Abstract

The invention discloses a liquid crystal display. The liquid crystal display uses a layout that reduces the number of data lines relative to the number of pixel columns by providing one data line for every two pixel columns. The display is configured to prevent the passivation layer from becoming opaque due to the haze effect of the fabrication by forming the pixel electrodes under the gate insulating layer. The display is configured to prevent damage to the drain electrodes due to the etchant used to pattern the pixel electrodes. In addition, the display is configured to prevent a short circuit between the common voltage line and the gate line without substantially lowering the opening by providing the common voltage contact hole between the vertically extending portions of the two gate lines extending generally horizontally The common voltage contact hole is used to electrically connect the common voltage line with the common electrode.

Description

technical field [0001] The invention relates to a liquid crystal display. Background technique [0002] Liquid crystal displays (LCDs) are one of the most common types of flat panel displays in use today. An LCD is a display device in which liquid crystal molecules of a liquid crystal layer are rearranged by applying an electric field across the liquid crystal layer so that the LC molecules are reoriented and their optical properties are used to control the amount of transmitted light. An electric field across the liquid crystal layer is typically created by applying a voltage between a so-called pixel electrode and an opposing common electrode. In one type of LCD, pixel electrodes and opposing common electrodes are respectively disposed on separate substrates. In the second type of LCD, a pixel electrode and an opposite common electrode are integrally disposed on the same substrate. [0003] Liquid crystal type displays have advantages such as being easy to make thin, bu...

AI Technical Summary

Problems solved by technology

[0004] However, during the fabrication of such devices (with pixel and common electrodes on the same substrate), new problems gradually arise

The first such problem is that the optical transmittance may be reduced by the haze effect caused by chemical reduction reactions that may occur between these two electrodes

Furthermore, if a pixel electrode is formed to directly contact the drain electrode of a corresponding thin film transistor (TFT) or another such switching element, the drain electrode can be damaged by the etchant used to pattern the pixel electrode

In addition, in order to connect the common electrode to the common voltage line for transmitting the common electrode voltage thereto, it may be necessary to form a contact hole, resulting in a decrease in the aperture ratio of the liquid crystal display.

In addition, the common voltage transmission line and the gate line may become short-circuited to each other, for example, due to static electricity generated at the time of forming the drain contact hole

[0005] Also, as liquid crystal displays generally increase in size (due to market demand), the number of data lines provided on one substrate tends to increase, and the cost of data drivers for driving these data lines also tends to increase, thereby increasing the liquid crystal display. The overall manufacturing cost of the display

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