US5715022A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Image display apparatus
Assignee: Sharp Corp
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Filing: 1994-10-07
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Granted: 1998-02-03
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Expires: 2014-10-07
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
2026-11-09 13:23
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: 27
Claim 1
Independent Claim
103 words
An image display apparatus comprising: a light source; a display means for forming a display image, said display means including a non-luminescent display panel, and a microlens disposed on a light-incidence side of said display panel; an optical means for illuminating said display means by light from said light source; 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 and that said adhesive contains spacers dispersed therein, and wherein said non-luminescent display panel is a liquid crystal display panel.
Claim 2
Dependent Claim
103 words
An image display apparatus comprising: a light source; a display means for forming a display image, said display means including a non-luminescent display panel, and a microlens disposed on a light-incidence side of said display panel; an optical means for illuminating said display means by light from said light source; 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 and that said adhesive contains spacers dispersed therein, and wherein said non-luminescent display panel is a liquid crystal display panel.
Claim 3
Dependent Claim
21 words
An image display apparatus according to claim 1, wherein said spacers have a lower elastic constant than that of said adhesive.
Claim 4
Dependent Claim
47 words
An image display apparatus according to claim 1, wherein said display panel has a plurality of picture elements arranged in a matrix and said microlens array has a plurality of microlenses arranged in a matrix so as to correspond to the picture elements of said display panel.
Claim 5
Dependent Claim
38 words
An image display apparatus according to claim 1, wherein said microlens array further has a plurality of color filters arranged so as to correspond to the microlenses, said color filters being made in at least three primary colors.
Claim 6
Dependent Claim
22 words
An image display apparatus according to claim 4, wherein said color filters are disposed on the light-incidence side of said microlens array.
Claim 7
Dependent Claim
22 words
An image display apparatus according to claim 4, wherein said color filters are disposed on the light-outgoing side of said microlens array.
Claim 8
Dependent Claim
21 words
An image display apparatus according to claim 4, wherein said color filters have a similar shape to that of said microlenses.
Claim 9
Dependent Claim
19 words
An image display apparatus according to claim 7, wherein the shapes of said microlenses and color filters are hexagonal.
Claim 10
Dependent Claim
54 words
An image display apparatus according to claim 1, wherein each of said display panel and said microlens array includes a glass substrate, said adhesive bonding said glass substrate of said microlens array with said glass substrate of said display panel and having a refractive index close to that of each of the glass substrates.
Claim 11
Dependent Claim
20 words
An image display apparatus according to claim 1, wherein said microlens array is a refractive index distribution type microlens array.
Claim 12
Dependent Claim
15 words
An image display apparatus according to claim 1, wherein the spacers are spherical plastic particles.
Claim 13
Dependent Claim
96 words
An image display apparatus comprising: a light source; a display means for forming a display image, said display means including a non-luminescent display panel, and a microlens array disposed on a light-incidence side of said display panel; an optical means for illuminating said display means by light from said light source; 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, and wherein said non-luminescent display panel is a liquid crystal display panel.
Claim 14
Dependent Claim
96 words
An image display apparatus comprising: a light source; a display means for forming a display image, said display means including a non-luminescent display panel, and a microlens array disposed on a light-incidence side of said display panel; an optical means for illuminating said display means by light from said light source; 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, and wherein said non-luminescent display panel is a liquid crystal display panel.
Claim 15
Dependent Claim
28 words
An image display apparatus according to claim 12, wherein said adhesive is in the form of a layer of substantially uniform thickness and of at least 10 microns.
Claim 16
Dependent Claim
47 words
An image display apparatus according to claim 12, wherein said display panel has a plurality of picture elements arranged in a matrix and said microlens array has a plurality of microlenses arranged in a matrix so as to correspond to the picture elements of said display panel.
Claim 17
Dependent Claim
38 words
An image display apparatus according to claim 12, wherein said microlens array further has a plurality of color filters arranged so as to correspond to the microlenses, said color filters being made in at least three primary colors.
Claim 18
Dependent Claim
22 words
An image display apparatus according to claim 15, wherein said color filters are disposed on the light-incidence side of said microlens array.
Claim 19
Dependent Claim
22 words
An image display apparatus according to claim 15, wherein said color filters are disposed on the light-outgoing side of said microlens array.
Claim 20
Dependent Claim
21 words
An image display apparatus according to claim 15, wherein said color filters have a similar shape to that of said microlenses.
Claim 21
Dependent Claim
19 words
An image display apparatus according to claim 18, wherein the shapes of said microlenses and color filters are hexagonal.
Claim 22
Dependent Claim
54 words
An image display apparatus according to claim 12, wherein each of said display panel and said microlens array includes a glass substrate, said adhesive bonding said glass substrate of said microlens array with said glass substrate of said display panel and having a refractive index close to that of each of the glass substrates.
Claim 23
Dependent Claim
20 words
An image display apparatus according to claim 12, wherein said microlens array is a refractive index distribution type microlens array.
Claim 24
Dependent Claim
50 words
An image display apparatus according to claim 1, wherein the liquid crystal display panel includes: a first substrate and a second substrate; a liquid crystal layer interposed between the first and second substrates; and wherein the microlens array is disposed between the light source and the liquid crystal display panel.
Claim 25
Dependent Claim
22 words
An image display apparatus according to claim 22, wherein the adhesive is provided between the microlens and the liquid crystal display panel.
Claim 26
Dependent Claim
50 words
An image display apparatus according to claim 12, wherein the liquid crystal display panel includes: a first substrate and a second substrate; a liquid crystal layer interposed between the first and second substrates; and wherein the microlens array is disposed between the light source and the liquid crystal display panel.
Claim 27
Dependent Claim
22 words
An image display apparatus according to claim 24, wherein the adhesive is provided between the microlens and the liquid crystal display panel.
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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) | 2001-02-02 | 2001-08-04 | 2002-02-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2005-02-02 | 2005-08-04 | 2006-02-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2009-02-02 | 2009-08-04 | 2010-02-03 | $7700.00 | Window Closed / Lapsed |