LCD with diffuser having diffusing particles therein located between polarizers
First Claim
1. A liquid crystal display comprising:
- first and second substantially transparent substrates;
a liquid crystal layer disposed between said first and second substrates;
a photo-imaged light diffuser layer disposed bewteen said liquid crystal layer and said second substrate, wherein said light diffuser layer includes a photo-imageable host material portion that is substantially transparent to at least one visible wavelength of light and a plurality of substantially spherical diffusing particles embedded in the host material portion; and
the host material having a refractive index of nh and the diffusing particles having a refractive index of np, and wherein Δ
n is greater than or equal to about 0.05, where Δ
n=np -nh.
8 Assignments
0 Petitions
Accused Products
Abstract
A liquid crystal display includes a patternable diffusing layer therein positioned between the display'"'"'s substrates. The diffusing (or diffuser) layer includes a host material having a plurality of particles (e.g. substantially transparent spherical balls or spacers) provided therein in order to perform a diffusion function. The refractive index np of the particles is different (i.e. Δn) from the refractive index nh of the host material by at least about 0.05, and Δn is preferably from about 0.05-0.15. In certain embodiments, photoimageable color filters, with diffusing particles embedded therein, function as discrete diffusing members across the passive substrate. In other embodiments, a substantially continuous diffusing layer with a transparent host, including spherical balls embedded therein, may be provided across the passive substrate between the substrate and the color filters. Still further, the diffusing layer with transparent host material may be provided between the common electrode and black matrix members on the passive substrate.
164 Citations
15 Claims
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1. A liquid crystal display comprising:
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first and second substantially transparent substrates; a liquid crystal layer disposed between said first and second substrates; a photo-imaged light diffuser layer disposed bewteen said liquid crystal layer and said second substrate, wherein said light diffuser layer includes a photo-imageable host material portion that is substantially transparent to at least one visible wavelength of light and a plurality of substantially spherical diffusing particles embedded in the host material portion; and the host material having a refractive index of nh and the diffusing particles having a refractive index of np, and wherein Δ
n is greater than or equal to about 0.05, where Δ
n=np -nh. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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15. A liquid crystal display comprising:
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first and second substrates; a liquid crystal layer disposed between said first and second substrates; a photo light diffuser layer disposed between said liquid crystal layer and said second substrate, wherein said light diffuser layer includes a host material portion that is substantially transparent to visible wavelengths of light and a plurality of substantially spherical diffusing particles embedded in the host material portion, the particles being shaped so as to focus light in order to effect diffusing; and the host material having a refractive index of nh and the diffusing particles having a refractive index of np, and wherein Δ
n is greater than or equal to about 0.05, where Δ
n=np -nh.
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Specification