US Patent No: 6,175,393
Number of patents in Portfolio can not be more than 2000
Active-matrix type liquid crystal display device and method of compensating for defective pixel
Stats
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Jan 16, 2001
Issued date -
Aug 20, 1996
filing date -
08/700,172
serial no -
In Force
status
Importance
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Abstract
Auxiliary lines are formed under pixel electrodes so as to be parallel to signal lines. The auxiliary lines are connected to the signal lines at one point for each pixel. This permits a voltage to be kept applying to a signal line even if a disconnection defect occurs in the signal line by making a circuit around a disconnected portion by the auxiliary line. Moreover, if a leakage defect occurs at a crossing point between the scanning line and the signal line, the signal line would be cut off on both sides of the scanning line. This also permits a voltage to be kept applying to the signal line by the auxiliary line. By setting the auxiliary lines narrower than the signal line, a reduction in aperture ratio can be suppressed, and by adopting the auxiliary lines made of a transparent electrically conductive material such as ITO, etc., it is possible to prevent the reduction in aperture ratio due to the auxiliary lines. The described arrangement permits a generation of a line-shaped defect due to disconnection to be prevented while improving an aperture ratio of the pixel with ease.
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First Claim
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International Classification(s)
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Cited Art
| Patent Info | (Count) | # Cites | Year |
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| 5,877,830 Liquid crystal display device having a light blocking layer in the periphery | 47 | 1996 | |
| 5,859,683 Transmissive liquid crystal display apparatus and method for producing the same | 73 | 1996 | |
| 5,771,083 Active matrix substrate and liquid crystal display device | 104 | 1996 | |
| 5,877,832 Active matrix substrate, for use in a liquid crystal display and method for producing the same | 41 | 1997 | |
| 5,822,027 Liquid crystal display device | 37 | 1997 | |
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| 5,032,883 Thin film transistor and method of manufacturing the same | 95 | 1988 | |
| 5,166,085 Method of manufacturing a thin film transistor | 93 | 1990 | |
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| 4,688,896 Information conversion device with auxiliary address lines for enhancing manufacturing yield | 49 | 1985 | |
| 5,475,246 Repair line structure for thin film electronic devices | 29 | 1993 | |
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| 5,696,566 Liquid crystal display and a manufacturing method thereof | 21 | 1996 | |
| 5,847,780 Liquid crystal display and a manufacturing method thereof | 30 | 1997 | |
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| 4,307,521 Shoe sole | 51 | 1978 | |
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| 5,641,974 LCD with bus lines overlapped by pixel electrodes and photo-imageable insulating layer therebetween | 248 | 1996 | |
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| 6,230,422 Method and apparatus for handling and drying a pulp web | 12 | 2000 | |
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| 5,585,951 Active-matrix substrate | 222 | 1993 | |
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| 5,682,211 Integrated dark matrix for an active matrix liquid crystal display with pixel electrodes overlapping gate data lines | 50 | 1995 | |
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| 4,368,523 Liquid crystal display device having redundant pairs of address buses | 114 | 1980 | |