Computer graphics processing and selective visual display system – Plural physical display element control system – Display elements arranged in matrix
Patent
1996-01-25
1998-05-19
Wu, Xiao
Computer graphics processing and selective visual display system
Plural physical display element control system
Display elements arranged in matrix
345100, 345206, 345211, G09G 336
Patent
active
057541558
ABSTRACT:
In an image display device, a reference voltage generating circuit of a power supply circuit, which applies power supply voltages V.sub.GH and V.sub.GL to a scan signal line driving circuit, is formed on a substrate where picture elements for display are formed, and a transistor which composes the reference voltage generating circuit has the approximately same threshold voltage as a picture element transistor TR.sub.(PIX) which composes the picture elements for display. As a result, the power supply voltages V.sub.GH and V.sub.GL to the scan signal line driving circuit automatically obtain which is optimized for a characteristic of the transistor TR(PIX) which composes the picture elements for display. Therefore, the power supply voltages V.sub.GH and V.sub.GL do not require adjustment per picture element array or every time when the usage environment is changed. As a result, the cost of adjustment is reduced and convenience of the usage is improved.
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Kubota Yasushi
Shiraki Ichiro
Sharp Kabushiki Kaisha
Wu Xiao
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