Method and apparatus for enhancing the select/nonselect ratio of

Details Method and apparatus for enhancing the select/nonselect ratio of Method and apparatus for enhancing the select/nonselect ratio of

1996-11-01

1999-06-08

Luu, Matthew

Computer graphics processing and selective visual display system

Plural physical display element control system

Display elements arranged in matrix

345 94, G09G 336

Patent

active

059107936

ABSTRACT:
The inventive method calculates the column coefficients for a liquid crystal display panel. By using this method, the invention shows that the select
onselect ratio can be maximized by the following ways: (1) Scaling the image to the maximally physically realizable select
onselect ration via the following equation ##EQU1## (2) Choosing an optimum value for row rms voltage "F", (3) Altering the statistics of an image, to reduce the variance of the different columns and/or increase the average of the columns, (4) Altering an image through fastest ascent or minimal error methods and (5) Designing the image to be predominantly at high rms voltage states. The select
onselect ratio determines the available voltage range to achieve gray scale or variation in intensity. By maximizing the select
onselect ratio, the present invention is able to obtain a wider range of intensity variation, i.e. larger contrast ratio.

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