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Class Information
Number: 345/691
Name: Computer graphics processing, operator interface processing, and selective visual display systems > Display driving control circuitry > Intensity or color driving control (e.g., gray scale) > Temporal processing (e.g., pulse width variation over time
Description: Subject matter wherein the brightness, light intensity, or color level is controlled by using different time periods in conveying the image data.

Sub-classes under this class:

Class Number Class Name Patents
345/692 Binary weighted 167
345/693 Non-binary weighted 67

Patents under this class:
1 2 3 4 5 6 7 8 9 10

Patent Number Title Of Patent Date Issued
5266940 Method of gray scale display for dot matrix type display device Nov. 30, 1993
5262766 Display unit having brightness control function Nov. 16, 1993
5245328 Method and apparatus for displaying different shades of gray on a liquid crystal display Sep. 14, 1993
5231387 Apparatus and method for addressing microtip fluorescent screen Jul. 27, 1993
5229760 Arithmetic technique for variable resolution printing in a ROS Jul. 20, 1993
5196839 Gray scales method and circuitry for flat panel graphics display Mar. 23, 1993
5172108 Multilevel image display method and system Dec. 15, 1992
5075683 Method and device for controlling a matrix screen displaying gray levels using time modulation Dec. 24, 1991
5010327 Method of driving a liquid crystal matrix panel Apr. 23, 1991
4965561 Continuously variable color optical device Oct. 23, 1990
4951041 Driving method for thin film el display device and driving circuit thereof Aug. 21, 1990
4870324 Half-tone display system for a flat matrix type cathode-ray tube Sep. 26, 1989
4864290 Display device Sep. 5, 1989
4845481 Continuously variable color display device Jul. 4, 1989
4799051 Display control apparatus Jan. 17, 1989
4769713 Method and apparatus for multi-gradation display Sep. 6, 1988
4720803 Display control apparatus for performing multicolor display by tiling display Jan. 19, 1988
4709995 Ferroelectric display panel and driving method therefor to achieve gray scale Dec. 1, 1987
4649432 Video display system Mar. 10, 1987
4581610 Method and apparatus for locally intensifying brightness in a video display device Apr. 8, 1986
4563740 Method and means for automatically variably controlling display parameters Jan. 7, 1986
4514727 Automatic brightness control apparatus Apr. 30, 1985
4393378 Generation of a light intensity control signal Jul. 12, 1983
4383256 Display device May. 10, 1983
4358788 Legibility for alpha-mosaic characters Nov. 9, 1982
4340889 Method and apparatus for coordinate dimming of electronic displays Jul. 20, 1982
4323896 High resolution video display system Apr. 6, 1982
4297691 Figure displaying device Oct. 27, 1981
4140997 Brain wave responsive programmable electronic visual display systems Feb. 20, 1979
4087792 Electro-optic display system May. 2, 1978
4067047 Circuit and method for generating gray scale in gaseous discharge panels Jan. 3, 1978
4021607 Video display system employing drive pulse of variable amplitude and width May. 3, 1977
4020280 Pulse width luminance modulation system for a DC gas discharge display panel Apr. 26, 1977
4002828 Method and circuit for generating gray scale in gaseous discharge panels Jan. 11, 1977
3984810 Direction warning indicator energizing circuit Oct. 5, 1976

1 2 3 4 5 6 7 8 9 10

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