Computer graphics processing and selective visual display system – Plural physical display element control system – Display elements arranged in matrix
Patent
1996-06-27
1999-12-14
Lao, Lun-Yi
Computer graphics processing and selective visual display system
Plural physical display element control system
Display elements arranged in matrix
345 89, 345208, 345 92, G09G 336
Patent
active
060023848
ABSTRACT:
Input connection terminals of a source driver of an active matrix type liquid crystal display panel, and analog switches are reduced in number. Two of four reference voltages V0, V2, V5 and V7 are combined with each other to output, in total, three combinations (V0, V2), (V2, V5) and (V5, V7) to two reference voltage lines and in each one of three first time periods W1a, W1b and W1c. Analog switches ASW0 and ASW2 for generating voltage are interposed in the respective reference voltage lines. The analog switches are turned on and off under control based on 3-bit display data D0, D1 and D2 for 8-level gradation in second time periods W2 and W3, which are shorter than the first time period W1, within any one of the first time periods W1, whereby a vibrating voltage is supplied to the source lines. Positively utilizing a low pass filter function of the source line due to the capacity and the resistance of the source line, voltages are averaged.
REFERENCES:
patent: 5196738 (1993-03-01), Takahara et al.
patent: 5521611 (1996-05-01), Okada et al.
patent: 5583531 (1996-12-01), Okada et al.
patent: 5640174 (1997-06-01), Kamei et al.
patent: 5642127 (1997-06-01), Tamai
Ogawa Yoshinori
Tamai Shigeki
Lao Lun-Yi
Sharp Kabushiki Kaisha
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