Patent US5381187A successfully refreshed from Google Patents.
US5381187A
Expired / Lapsed
US
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Image display apparatus
Assignee: Sharp Corp
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Filing: 1992-02-13
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Granted: 1995-01-10
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Expires: 2012-02-13
Abstract
Abstract An image display apparatus is disclosed which includes: an optical system including a light source and at least one projection lens; a display means for forming a display image, the display means including a non-luminescent display panel and a microlens array disposed on the light-incidence side of the display panel; and at least one projection lens for projecting the display image; wherein the display panel and the microlens array are combined with each other by means of an adhesive made of a transparent material. In cases where the microlens array is provided with color filters which are arranged so as to correspond to the microlenses of this array, the image display apparatus can provide a bright display of color images with an improved contrast. Moreover, when the display panel and the microlens array are combined with each other by means of an adhesive containing spacers, the image display apparatus has a high thermal reliability.
Inventors
- 👤 Toshiaki Takamatsu
- 👤 Shinichi Ogawa
- 👤 Masao Yoshikawa
- 👤 Hiroshi Hamada
- 👤 Noriko Watanabe
- 👤 Fumiaki Funada
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 06:09
CPC Classifications
G; G09; G09F; G09F13/00; H; H04; H04N; H04N9/00; H04N9/12; H04N9/31; H04N9/3102; H04N9/3105; H04N9/3108; G02; G02F; G02F1/00; G02F1/01; G02F1/13; G02F1/133; G02F1/1333; G02F1/1335; G02F1/133526; H04N5/00; H04N5/74; H04N5/7416; H04N5/7441
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
184 words
An image display apparatus comprising: an optical system including a light source and at least one projection lens; a display means for forming a display image, said display means including a liquid crystal display panel disposed on a substrate and a microlens array disposed on the light-incidence side of said display panel, wherein said display panel has a plurality of picture elements arranged in a delta-shaped matrix and said microlens array includes a plurality of microlenses arranged in a delta-shape so as to correspond to the picture elements of said display panel and includes a plurality of color filters formed independently of the microlenses and arranged at positions corresponding to the microlenses, said color filters being made in at least three primary colors and being disposed on said microlens array; and at least one projection lens for projecting the display image; wherein said display panel and said microlens array are combined with each other by means of an adhesive made of a transparent material having a refractive index which is virtually equal to that of the microlenses and that of the display panel substrate.
Claim 2
Dependent Claim
184 words
An image display apparatus comprising: an optical system including a light source and at least one projection lens; a display means for forming a display image, said display means including a liquid crystal display panel disposed on a substrate and a microlens array disposed on the light-incidence side of said display panel, wherein said display panel has a plurality of picture elements arranged in a delta-shaped matrix and said microlens array includes a plurality of microlenses arranged in a delta-shape so as to correspond to the picture elements of said display panel and includes a plurality of color filters formed independently of the microlenses and arranged at positions corresponding to the microlenses, said color filters being made in at least three primary colors and being disposed on said microlens array; and at least one projection lens for projecting the display image; wherein said display panel and said microlens array are combined with each other by means of an adhesive made of a transparent material having a refractive index which is virtually equal to that of the microlenses and that of the display panel substrate.
Claim 3
Dependent Claim
21 words
An image display apparatus according to claim 1, wherein the color filters have a similar shape to that of the microlenses.
Claim 4
Dependent Claim
19 words
An image display apparatus according to claim 1, wherein the shapes of the microlenses and color filters are hexagonal.
Claim 5
Dependent Claim
15 words
An image display apparatus according to claim 1, wherein the adhesive contains spacers dispersed therein.
Claim 6
Dependent Claim
21 words
An image display apparatus according to claim 4, wherein said spacers have a lower elastic constant than that of said adhesive.
Claim 7
Dependent Claim
22 words
An image display apparatus according to claim 1, wherein said color filters are formed on the light-incidence side of said microlens array.
Claim 8
Dependent Claim
22 words
An image display apparatus according to claim 1, wherein said color filters are formed on the light-outgoing side of said microlens array.
Claim 9
Dependent Claim
20 words
An image display apparatus according to claim 1, wherein said microlens array is a refractive index distribution type microlens array.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1998-01-09 | 1998-07-11 | 1999-01-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2002-01-09 | 2002-07-11 | 2003-01-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2006-01-09 | 2006-07-11 | 2007-01-10 | $7700.00 | Window Closed / Lapsed |