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EP0444872A2 Expired / Lapsed EP ⏱️ 0.0 years remaining

A liquid crystal display device

Assignee: Sharp Corp
•
Filing: 1991-02-26
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Granted: —
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Expires: 2011-02-26
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Abstract

Abstract Disclosed is a liquid crystal display device which comprises first (1) and second (8) transparent substrates disposed one above the other, and a liquid crystal layer (6) disposed therebetween and having pixels. The second transparent substrate (8) includes a microlens array (2) therein, which has microlenses (9) for converging light on the respective pixels. The microlenses (9) are so positioned that their focal points are located in the vicinity of the inner surface of the second transparent substrate (8), which is the surface on the side provided with the liquid crystal layer (6). Since the microlens array (2) is included in one of the two transparent substrates (1,8), the focal length of each microlens (9) can be made shorter, resulting in an improved effective aperture ratio.

Inventors

  • 👤 Noriko Watanabe
  • 👤 Hiroshi Hamada
  • 👤 Fumiaki Funada

Bibliographic Details

Application Number —
Jurisdiction EP
Data Source google_patents
Last Synchronized 2026-11-03 17:12
CPC Classifications
G; G02; G02F; G02F1/00; G02F1/01; G02F1/13; G02F1/133; G02F1/1333; G02F1/1335; G02F1/133526

Claims Analysis

Total Claims: 6
Claim 1
Independent Claim 98 words
A liquid crystal display device comprising: a first transparent substrate and a second transparent substrate disposed one above the other; and a liquid crystal layer which is disposed between said first end second transparent substrates and has pixels formed therein, wherein said second transparent substrate includes a microlens array therein, said microlens array having microlenses for converging light on the respective pixels, said microlenses being so positioned that their focal points are located in the vicinity of the inner surface of said second transparent substrate, said inner surface of the second transparent substrate facing said liquid crystal layer.
Claim 2
Dependent Claim 28 words
A liquid crystal display device according to claim 1, wherein said second transparent substrate further includes a plastic film on the side provided with said liquid crystal layer.
Claim 3
Dependent Claim 28 words
A liquid crystal display device according to claim 1, wherein said second transparent substrate further includes a glass plate on the side provided with said liquid crystal layer.
Claim 4
Dependent Claim 22 words
A liquid crystal display device according to claim 1, wherein each of said microlenses of said microlens array is a convex lens.
Claim 5
Dependent Claim 27 words
A liquid crystal display device according to claim 1, wherein said microlens array is a planar microlens array, the microlenses of which are spherical gradient index microlenses.
Claim 6
Dependent Claim 20 words
A liquid crystal display device according to claim 5, wherein maid planar microlens array is provided with a coating film.

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