Liquid crystal display device
a liquid crystal display and display device technology, applied in the field of active matrix type liquid crystal display devices, can solve the problems of harmful effect of thermal expansion defective connection between flexible wiring boards, etc., and achieve the effects of preventing waveform distortion of signals, increasing the capacity of interconnection lines of flexible wiring boards, and reducing capacity
Inactive Publication Date: 2010-06-15
PANASONIC LIQUID CRYSTAL DISPLAY CO LTD +1
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- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Benefits of technology
"The present invention aims to provide a liquid crystal display device that can prevent defective connection between the flexible wiring board and the transparent substrate of the liquid crystal display panel, as well as waveform distortion of signals transmitted to the video signal lines. The invention achieves this by using a structure that reduces thermal stress and prevents expansion of the flexible wiring board, even if it is thermally expanded. Additionally, the invention addresses the issue of signal distortion caused by the distance between the connecting points of the flexible wiring board and the most distant signal line or lines."
Problems solved by technology
However, in a trend toward an increase in the size of the liquid crystal display device constructed in the above-described manner, it has been pointed out that a defective connection occasionally occurs between the flexible wiring board and one transparent substrate of the liquid crystal display panel.
It has also been found out that the harmful effect of thermal expansion of the flexible wiring board occurs not only while the flexible wiring board is being connected to one of the transparent substrates of the liquid crystal display panel, but also after the flexible wiring board has been connected.
Method used
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embodiment 1
[0043]FIG. 1 is a schematic view showing, the structure of the entire liquid crystal display device according to the present invention.
[0044]In this embodiment, the present invention is applied to a liquid crystal display device which adopts a so-called lateral electric field type (also called an In-Plane-Switching type or IPS type) known as a type having a wide viewing angle.
[0045]In FIG. 1, a liquid crystal display panel 1 is constructed as a chamber for a liquid crystal (not shown) which has transparent substrates 1A and 1B arranged to oppose each other across the liquid crystal. In this case, one of the transparent substrate (the lower substrate shown in FIG. 1: the matrix substrate 1A) is formed to be slightly larger than the other transparent substrate (the upper substrate shown in FIG. 1: the color filter substrate 1B), and, as viewed in FIG. 1, the bottom and right edges of the transparent substrate 1A are nearly flush with the bottom and right edges of the transparent subst...
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Abstract
In spite of an increase in the size of a liquid crystal display panel, it is possible to prevent the defective connection of a flexible wiring board to a transparent substrate of the liquid crystal display panel. A liquid crystal display device includes a pair of transparent substrates arranged to oppose each other across a liquid crystal, for which they are utilized to form a chamber, a plurality of pixels formed along a spreading direction of the liquid crystal, driving circuits for supplying video signals to the pixels, and a flexible wiring board for supplying signals to the input sides of the driving circuits from a substrate on which a control circuit is mounted, the flexible wiring board being divided into a plurality of portions.
Description
CROSS REFERENCE TO RELATED APPLICATIONS[0001]This is a continuation reissue of reissue application U.S. Ser. No. 11 / 165,554, filed Jun. 24, 2005, which is a reissue of U.S. Pat. No. 6,583,844, issued Jun. 24, 2003, the subject matter of which is incorporated by reference herein.<?insert-end id="INS-S-00001" ?>BACKGROUND OF THE INVENTION[0002]1. Field of the Invention[0003]The present invention relates to a liquid crystal display device and, more particularly, to an active matrix type of liquid crystal display device.[0004]2. Description of the Related Art[0005]An active matrix type of liquid crystal display device is characterized by a structure in which a switching element made of, for example, a thin-film transistor (TFT) is incorporated in each pixel of its liquid crystal display panel.[0006]The active matrix type of liquid crystal display device has, as a chamber for a liquid crystal, a pair of substrates (at least one of which is a so-called transparent substrate having a...
Claims
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IPC IPC(8): G02F1/1345G09G3/36G09G5/00G02F1/13G02F1/133
CPCG02F1/13452G02F1/133
Inventor MISHIMA, YASUYUKIMORISHITA, SHUNSUKE
Owner PANASONIC LIQUID CRYSTAL DISPLAY CO LTD