Frame buffer pixel circuit for liquid crystal display

Details Frame buffer pixel circuit for liquid crystal display Frame buffer pixel circuit for liquid crystal display

2005-06-24

2008-12-02

Patel, Nitin (Department: 2629)

Computer graphics processing and selective visual display system

Plural physical display element control system

Display elements arranged in matrix

C345S090000

Reexamination Certificate

active

07460101

ABSTRACT:
An enhanced frame buffet pixel circuit with two control transistors and a separate capacitor put in as a memory capacitor before the memory transistor yields a high contrast ratio by removing induced charge and solving a charge sharing problem between the memory capacitor and the liquid crystal display (LCD) capacitor. The memory transistor may be made of either CMOS or PMOS. The frame buffer pixel can be used to drive binary displays which expresses ON and OFF only if a comparator is put in after the pixel electrode circuit to represent gray levels with reduced sub-frame frequency.

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