Patent EP0425251A2 successfully refreshed from Google Patents.
EP0425251A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Image display apparatus
Assignee: Sharp Corp
•
Filing: 1990-10-23
•
Granted: —
•
Expires: 2010-10-23
Abstract
Abstract An image display apparatus which includes a display panel unit (2) having a plurality of pixels, and a flat-plate microlens array (1) of a refraction index distribution type which is constituted by forming a plurality of microlenses (11) for converging illuminating light onto the respective ones of the pixels, in a substrate (10) by a diffusion process, in which diffusion fronts (12) of the neighboring microlenses (11) of the flat-plate microlens array (1) are fused into each other so as to form one continuous curved surface within the substrate (10).
Inventors
- 👤 Hiroshi Hamada
- 👤 Fumiaki Funada
- 👤 Kenjiro C/O Nippon Itagarasu Hamanaka
- 👤 Kouji Tanaka
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-04 21:04
CPC Classifications
G; G02; G02F; G02F1/00; G02F1/01; G02F1/13; G02B; G02B3/00; G02B3/0006; G02B3/0037; G02B3/0056; G02B3/0012; G02F1/133; G02F1/1333; G02F1/1335; G02F1/133526
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
89 words
An image display apparatus which comprises a display panel means (2) having a plurality of pixels, and a flat-plate microlens array (1) of a refraction index distribution type which is constituted by forming a plurality of microlenses (11) for converging illuminating light onto the respective ones of said pixels, on a substrate (10) by a diffusion process, wherein diffusion fronts (12) of the neighboring microlenses (11) of said flat-plate microlens array (1) are fused into each other so as to form one continuous curved surface within said substrate (10).
Claim 2
Dependent Claim
89 words
An image display apparatus which comprises a display panel means (2) having a plurality of pixels, and a flat-plate microlens array (1) of a refraction index distribution type which is constituted by forming a plurality of microlenses (11) for converging illuminating light onto the respective ones of said pixels, on a substrate (10) by a diffusion process, wherein diffusion fronts (12) of the neighboring microlenses (11) of said flat-plate microlens array (1) are fused into each other so as to form one continuous curved surface within said substrate (10).
Claim 3
Dependent Claim
19 words
An image display apparatus as claimed in Claim 1, wherein said display panel means (2) is of liquid crystal.
Claim 4
Dependent Claim
23 words
An image display apparatus as claimed in Claim 2, wherein said liquid crystal display panel means (2) includes one liquid crystal display panel.
Claim 5
Dependent Claim
40 words
An image display apparatus as claimed in Claim 2, wherein said liquid crystal display panel means (2) includes three sheets of liquid crystal panels respectively displaying images in three primary colors which are optically combined to provide a colored image.
Claim 6
Dependent Claim
19 words
An image display apparatus as claimed in Claim 1, wherein said display panel means is of a transmission type.
Claim 7
Dependent Claim
22 words
An image display apparatus as claimed in Claim 1, wherein said flat-plate microlens array (1) is prepared by an ion exchange process.
Claim 8
Dependent Claim
23 words
An image display apparatus as claimed in Claim 1, wherein said flat-plate microlens array (1) is prepared by a monomer diffusion copolymerization process.
Claim 9
Dependent Claim
27 words
An image display apparatus as claimed in Claim 1, wherein said flat-plate microlens array (1) is constituted by forming the microlenses (11) each having a semispherical shape.
Claim 10
Dependent Claim
38 words
An image display apparatus as claimed in Claim 1, wherein said flat-plate microlens array (1) is constituted by forming lenticular lenses in which a large number of cylindrical lenses are arranged in a parallel relation at equal intervals.
Claim 11
Dependent Claim
25 words
An image display apparatus as claimed in Claim 1, wherein said flat-plate microlens array (1) is constituted by forming Fresnel lenses for the microlenses (11).
Claim 12
Dependent Claim
49 words
A refractive index distribution flat-plate microlens array (1) having a plurality of microlenses (11) having curved fronts (12) for converging incident light to a plurality of regions characterised in that the boundary of each said front (12) is defined by boundary portions of the fronts of neighbouring microlenses (11).
Claim 13
Dependent Claim
49 words
A refractive index distribution flat-plate microlens array (1) having a plurality of microlenses (11) having curved fronts (12) for converging incident light to a plurality of regions characterised in that the boundary of each said front (12) is defined by boundary portions of the fronts of neighbouring microlenses (11).
Claim 14
Dependent Claim
40 words
A refractive index distribution flat-plate microlens array (1) having a plurality of microlenses (11) for converging incident light to a plurality of regions characterised in that the microlenses (11) occupy substantially the entire surface area of the microlens array (1).
Claim 15
Dependent Claim
40 words
A refractive index distribution flat-plate microlens array (1) having a plurality of microlenses (11) for converging incident light to a plurality of regions characterised in that the microlenses (11) occupy substantially the entire surface area of the microlens array (1).
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
Maintenance schedule is calculated for granted US utility patents.