Appeal No. 1999-0578
Application 08/217,641
now directed to the rejection of claims 1-4, 8, 29 and 30.
The disclosed invention pertains to a spatial light
modulator for a display device. More specifically, the
disclosed invention is directed to a spatial light modulator
which has a spatially uniform intermediate state between a
stable fixed on state and a stable fixed off state.
Representative claim 1 is reproduced as follows:
1. A spatial light modulator including a pair of
facing transparent electrodes, and a light-modulating layer
and a photoconductive layer provided between said transparent
electrodes,
wherein said light-modulating layer has different
optical states depending on an applied charge amount, said
light-modulating layer having: a first optical state when said
applied charge amount is a first threshold charge amount or
more; a second optical state when said applied charge amount
is a second threshold charge amount of less; and a spatially
uniform intermediate state between said first optical state
and said second optical state depending on said applied charge
amount.
The examiner relies on the following references:
Harwood et al. (Harwood) 4,888,599 Dec. 19, 1989
Hanyu et al. (Hanyu) 4,932,757 June 12, 1990
Hartmann 4,976,515 Dec. 11, 1990
Fukushima et al. (Fukushima) 5,130,830 July 14, 1992
Takimoto et al. (Takimoto 1) 5,364,668 Nov. 15, 1994
(filed Jan. 03,
1992)
Takimoto et al. (Takimoto 2) EP 0 494 452 July 15, 1992
2
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