Optical: systems and elements – Holographic system or element – Using a hologram as an optical element
Patent
1992-03-30
1994-02-08
Sikes, William L.
Optical: systems and elements
Holographic system or element
Using a hologram as an optical element
359 55, 359 57, G02F 11343
Patent
active
052853020
ABSTRACT:
A thin film switching array includes a plurality of switching elements arranged in the shape of an array on a substrate. Each switching element includes a thin film transistor and a compensation capacitor. One electrode of the compensation capacitor is formed by the same mask layer as the gate of the thin film transistor, and the other electrode of the compensation capacitor is common to the source electrode of the thin film transistor. The butting error due to multiple exposures of the number of blocks to compose a large area active matrix liquid crystal display, known as the block division effect, can be eliminated by laying out the compensation capacitor with area complementary to that of the stray capacitance such that the summation of the two capacitances remain constant. With constant capacitance, the feedthrough transient from the gate sigate to the liquid crystal display element becomes uniform, and one common compensating voltage can be used to offset the transient effect.
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Gross Anita Pellman
Industrial Technology Research Institute
Lin H. C.
Sikes William L.
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