US5654810A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Liquid crystal display apparatus with a particular microlens array
Assignee: Olympus Corp
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Filing: 1994-10-07
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Granted: 1997-08-05
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Expires: 2014-10-07
Abstract
Abstract A liquid crystal display apparatus designed so that the viewing angle dependence is minimized without causing the displayed image to become unsharp. The liquid crystal display apparatus has a display surface (16) for displaying an image by a plurality of pixels, and a backlight (11) disposed at a side of the apparatus which is reverse to the display surface (16) to allow an approximately parallel light beam, which is approximately normal to the display surface (16), to enter each pixel of the display surface. A microlens array (20) is disposed at the viewing side of the display surface (16), and a diffusing element (21) is disposed in the vicinity of a surface conjugate with the display surface (16) which is formed by the microlens array (20).
Inventors
- 👤 Toshiro Okamura
- 👤 Seiichiro Tabata
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 04:55
CPC Classifications
G; G02; G02B; G02B3/00; G02B3/0006; G02B3/0037; G02B3/0056; G02B27/00; G02B27/01; G02B27/017; G02B27/0172; G02F; G02F1/00; G02F1/01; G02F1/13; G02F1/133; G02F1/1333; G02F1/1335; G02F1/133504; G02F1/133526; G02B27/0101; G02B2027/0132; G02B2027/0178; G02B5/00; G02B5/18; G02F1/13356; G02F1/133562
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
105 words
A liquid crystal display apparatus having a display surface for displaying an image by a plurality of pixels, and a backlight disposed at a side of the apparatus which is reverse to said display surface to allow an approximately parallel light beam, which is approximately normal to said display surface, to enter each pixel of said display surface, wherein the improvement comprises: a microlens array disposed at a viewing side of said display surface; and a diffusing element disposed in the vicinity of a surface conjugate with said display surface which is formed by said microlens array, wherein said diffusing element is a diffraction grating.
Claim 2
Dependent Claim
105 words
A liquid crystal display apparatus having a display surface for displaying an image by a plurality of pixels, and a backlight disposed at a side of the apparatus which is reverse to said display surface to allow an approximately parallel light beam, which is approximately normal to said display surface, to enter each pixel of said display surface, wherein the improvement comprises: a microlens array disposed at a viewing side of said display surface; and a diffusing element disposed in the vicinity of a surface conjugate with said display surface which is formed by said microlens array, wherein said diffusing element is a diffraction grating.
Claim 3
Dependent Claim
17 words
A liquid crystal display apparatus according to claim 1, wherein said diffraction grating is a hexagonal grating.
Claim 4
Dependent Claim
27 words
A liquid crystal display apparatus according to claim 1, wherein said microlens array is composed of microlenses each having a convex surface provided on a polygonal base.
Claim 5
Dependent Claim
27 words
A liquid crystal display apparatus according to claim 1, wherein said microlens array is composed of microlenses each having a concave surface provided on a polygonal base.
Claim 6
Dependent Claim
107 words
A liquid crystal display apparatus having a display surface for displaying an image by a plurality of pixels, and a backlight disposed at a side of the apparatus which is reverse to said display surface to allow an approximately parallel light beam, which is approximately normal to said display surface, to enter each pixel of said display surface, wherein the improvement comprises: a microlens array disposed at a viewing side of said display surface; and a diffusing element disposed at a position slightly apart from a surface conjugate with said display surface which is formed by said microlens array, wherein said diffusing element is a diffraction grating.
Claim 7
Dependent Claim
107 words
A liquid crystal display apparatus having a display surface for displaying an image by a plurality of pixels, and a backlight disposed at a side of the apparatus which is reverse to said display surface to allow an approximately parallel light beam, which is approximately normal to said display surface, to enter each pixel of said display surface, wherein the improvement comprises: a microlens array disposed at a viewing side of said display surface; and a diffusing element disposed at a position slightly apart from a surface conjugate with said display surface which is formed by said microlens array, wherein said diffusing element is a diffraction grating.
Claim 8
Dependent Claim
45 words
A liquid crystal display apparatus according to claim 5, wherein said position slightly apart from a surface conjugate with said display surface is a position at which an image is formed so as to fill a dead space between the pixels of said display surface.
References Cited (Backward Citations)
JPH01284731A
Cited
US5046827A
Cited
US5046827C1
Cited
JPH03242603A
Cited
JPH0472221A
Cited
US5365354A
Cited
JPH05134252A
Cited
JPH05313154A
Cited
US5465175A
Cited
JPH06167697A
Cited
US5471327A
Cited
JPH09204026A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2000-08-04 | 2001-02-03 | 2001-08-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2004-08-04 | 2005-02-03 | 2005-08-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2008-08-04 | 2009-02-03 | 2009-08-05 | $7700.00 | Window Closed / Lapsed |