LCD microlens substrate with a lens array and a uniform material

Details LCD microlens substrate with a lens array and a uniform material LCD microlens substrate with a lens array and a uniform material

1994-12-15

1996-08-06

Pellman Gross, Anita

Optical: systems and elements

Holographic system or element

Using a hologram as an optical element

359619, 359 74, G02F 11335, G02F 11333

Patent

active

055439420

ABSTRACT:
The present invention discloses an opposed substrate for use in a liquid crystal display element, for example. The opposed substrate is constructed by a transparent substrate, microlenses formed on the substrate, a bonding layer, and cover glass. An alignment film and transparent electrodes are formed on the cover glass. The microlenses and the bonding layer are formed by selected resins which have thermal resistance to high temperatures not lower than 150.degree. C., permit heating treatment for forming the alignment film, and satisfy the difference in the refractive indexes between the resins, .increment.n.gtoreq.0.1, so as to enable the microlenses to have a numerical aperture not lower than 0.1. It is thus possible to prevent the decomposition of resins and separation of the microlens in heat treatment and to provide a high-quality, highly reliable liquid crystal display element.

REFERENCES:
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patent: 5093574 (1992-03-01), Pratt et al.
patent: 5185601 (1993-02-01), Takeda et al.
patent: 5225935 (1993-07-01), Watanabe et al.
patent: 5335102 (1994-08-01), Kanemori et al.
patent: 5381187 (1995-01-01), Takamatsu et al.
Distributed-Index Planar Microlens . . . , M. Oikawa et al., Electronics Letters, Jun. 1981, vol. 17, No. 13, pp. 452-454.
New Fabrication Method of Plastic Micro Lens, T. Suzuki et al., 24th Microoptics Research Paper, pp. 20-25.
Technique for Monolithic Fabrication . . . , Z. Popovic et al., Applied Optics, vol. 27, No. 7, Apr. 1988, pp. 1281-1284.

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