Display electrode arrangement for a reflection type liquid crystal display device
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United States of America Patent
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-
Jan 7, 2003
Grant Date -
N/A
app pub date -
Jul 13, 2000
filing date -
Jul 14, 1999
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
An insulator substrate (10) is provided with a TFT including a first gate electrode (11), a gate insulating film (12), a semiconductor film (13) disposed above the first gate electrode (11), and an interlayer insulating film (15). On the interlayer insulating film (15) in a position above a channel (13c), the TFT further includes a second gate electrode (17) connected to the first gate electrode (11). A reflective display electrode (20) composed of a reflective material and connected to a source (13s) of the TFT is arranged to extend over the TFT. In addition, the gap (37) between adjacent reflective display electrodes (20) is arranged in a position other than a position above a drain signal line (52). With this arrangement, even when a black image is displayed on a crystal display device of a normally white mode, display defects due to reflection of incident light by a signal line are prevented. Furthermore, a reflection type liquid crystal display device having a high aperture rate and minimal fluctuation in the TFT characteristics can be achieved.
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