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EP0409619A2
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A projection type image display apparatus
Assignee: Sharp Corp
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Filing: 1990-07-19
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Granted: —
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Expires: 2010-07-19
Abstract
Abstract A projection type image display apparatus having a source of light, a transmissive display device having a number of picture elements, a light converging means for converging rays of light in correspondence to one or more of the picture elements, a projecting lens disposed backward of the display device so as to project the image represented by the display device on a screen, the projection lens having a larger numerical aperture than that of the converging means.
Inventors
- 👤 Hiroshi Hamada
- 👤 Fumiaki Funada
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-09 22:21
CPC Classifications
G; G09; G09F; G09F13/00; G03; G03B; G03B21/00; G03B21/14; G02; G02B; G02B3/00; G02B3/0006; G02B3/0037; G02B3/005; G02B3/0056; G02F; G02F1/00; G02F1/01; G02F1/13; G02F1/133; G02F1/1333; G02F1/1335; G02F1/133526; G03B21/20; G03B21/208; H; H04; H04N; H04N5/00; H04N5/74; H04N5/7416; H04N5/7441
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
77 words
A projection type image display apparatus comprising a source of light, a transmissive display device having a number of picture elements, a light converging means for converging rays of light in correspondence to one or more of the picture elements, a projecting lens disposed backward of the display device so as to project the image represented by the display device on a screen, the projection lens having a larger numerical aperture than that of the converging means.
Claim 2
Dependent Claim
77 words
A projection type image display apparatus comprising a source of light, a transmissive display device having a number of picture elements, a light converging means for converging rays of light in correspondence to one or more of the picture elements, a projecting lens disposed backward of the display device so as to project the image represented by the display device on a screen, the projection lens having a larger numerical aperture than that of the converging means.
Claim 3
Dependent Claim
19 words
A projection type image display apparatus as claimed in claim 1, wherein the converging means comprises a microlens array.
Claim 4
Dependent Claim
23 words
A projection type image display apparatus as claimed in claim 1, wherein the converging means comprises a microlens array and a condenser lens.
Claim 5
Dependent Claim
48 words
A projection type image display apparatus as claimed in claim 2, wherein the microlens array is bonded Go the display device with an adhesive selected from substances having a refractive index approximately within-the difference of 0.1 to that of a material of which the microlens array is made.
References Cited (Backward Citations)
No citation records indexed.
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