Patent EP0100990B1 successfully refreshed from Google Patents.
EP0457280A2
Expired / Lapsed
EP
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Screen and projector using said screen
Assignee: Canon Inc
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Filing: 1991-05-14
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Granted: —
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Expires: 2011-05-14
Abstract
Abstract A screen is constituted of a sheet having a first lens array, and a second lens array formed in the interior of said sheet, wherein each lens of said second lens array is arranged in correspondence with each lens of said first lens array. <IMAGE>
Inventors
- 👤 Hideaki C/O Canon Kabushiki Kaisha Mitsutake
- 👤 Shigeru C/O Canon Kabushiki Kaisha Kawasaki
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-03 16:36
CPC Classifications
G; G03; G03B; G03B21/00; G03B21/54; G03B21/56; G03B21/60; G03B21/62; G03B21/625
Claims Analysis
Total Claims: 50
Claim 1
Independent Claim
42 words
A screen comprising: a sheet having a first lens array; and a second lens array formed in the interior of said sheet, with each lens of said second lens array being arranged in correspondence with each lens of said first lens array.
Claim 2
Dependent Claim
20 words
A screen according to claim 1, wherein each lens of said first and second lens array has a positive power.
Claim 3
Dependent Claim
22 words
A screen according to claim 2, wherein each lens of said first and second lens array is composed of a cylindrical lens.
Claim 4
Dependent Claim
19 words
A screen according to claim 3, wherein said first lens array is formed on a surface of said sheet.
Claim 5
Dependent Claim
21 words
A screen according to claim 4, wherein each lens of said first lens array has a refractive surface formed as aspherical.
Claim 6
Dependent Claim
35 words
A screen according to claim 5, wherein each lens of said first lens array has a refractive surface of a shape whose curvature gradually increases in leaving away from the optical axis of each lens.
Claim 7
Dependent Claim
20 words
A screen according to claim 3, wherein each lens of said second lens array is composed of a biconvex lens.
Claim 8
Dependent Claim
24 words
A screen according to claim 7, wherein each lens of said second lens array is made of a medium having a refractive index distribution.
Claim 9
Dependent Claim
65 words
A screen according to claim 3, wherein said sheet has an array of a plurality of biconvex cylindrical lenses and a transparent member bonded on said array so as to cover one surface of said array, and wherein said first lens array is constituted of the other surface of said array, and said second lens array is constituted of said one surface of said array.
Claim 10
Dependent Claim
23 words
A screen according to claim 9, wherein each cylindrical lens of said array is made of a medium having a refractive index distribution.
Claim 11
Dependent Claim
34 words
A screen according to claim 3, wherein the optical axis of each lens in said first lens array and that of each lens in said second lens array are made coincident with each other.
Claim 12
Dependent Claim
26 words
A screen according to claim 11, wherein said first lens array and said second lens array constitute a substantially telecentric system on the light emergent side.
Claim 13
Dependent Claim
66 words
A screen having a lenticular lens sheet characterized in that: a plurality of cylindrical lenses are formed in the interior of said sheet; each of said plurality of cylindrical lenses is arranged in correspondence with each lens of said lenticular lens; and the generating line direction for each of said plurality of cylindrical lenses is substantially coincident with that for each lens of said lenticular lens.
Claim 14
Dependent Claim
26 words
A screen according to claim 13, wherein said lenticular lens and said plurality of cylindrical lenses constitute a substantially telecentric system on the light emergent side.
Claim 15
Dependent Claim
31 words
A screen according to claim 13, wherein each lens of said lenticular lens has a refractive surface whose curvature gradually increases it leaves away from the optical axis of each lens.
Claim 16
Dependent Claim
25 words
A screen according to claim 13, wherein the refractive index of each of said plurality of cylindrical lenses is greater than that of said sheet.
Claim 17
Dependent Claim
22 words
A screen according to claim 13, wherein the medium of each of said plurality of cylindrical lenses has a refractive index distribution.
Claim 18
Dependent Claim
34 words
A screen according to claim 13, wherein the optical axis of each lens of said lenticular lens and that of each lens of said plurality of cylindrical lenses are substantially coincident with each other.
Claim 19
Dependent Claim
42 words
A screen having a biconvex lenticular lens sheet characterized in that: a transparent member is bonded on said sheet so as to cover one surface of said sheet; and the refractive index of said member is smaller than that of said sheet.
Claim 20
Dependent Claim
23 words
A screen according to claim 19, wherein a surface of said transparent member is substantially flat on the opposite side to said sheet.
Claim 21
Dependent Claim
18 words
A screen according to claim 19, wherein said sheet comprises a plurality of biconvex cylindrical lenses arranged therein.
Claim 22
Dependent Claim
17 words
A screen according to claim 19, wherein the medium of said sheet has a refractive index distribution.
Claim 23
Dependent Claim
21 words
A screen according to claim 19, wherein said biconvex lenticular lens constitutes a substantially telecentric system on the light emergent side.
Claim 24
Dependent Claim
24 words
A screen comprising a sheet having a lens array formed characterized in that said lens array is disposed in the interior of said sheet.
Claim 25
Dependent Claim
35 words
A screen according to claim 24, wherein said sheet comprises another lens array on a surface, with each lens of said lens array being arranged in correspondence with each lens of said another lens array.
Claim 26
Dependent Claim
11 words
A screen according to claim 24, comprising a Fresnel lens sheet.
Claim 27
Dependent Claim
58 words
A projector comprising: means for projecting an image; and a screen for receiving said image, and wherein said screen has a sheet having a first lens array, said sheet has a second lens array in the interior thereof, and each lens of said second lens array is arranged in correspondence with each lens of said first lens array.
Claim 28
Dependent Claim
26 words
A projector according to claim 27, wherein said first lens array is formed on a surface of said sheet on the side of said projecting means.
Claim 29
Dependent Claim
54 words
A projector according to claim 27, wherein said screen comprises a Fresnel lens sheet on the side of said sheet closer to said projecting means, said Fresnel lens sheet allowing the principal light beam of flux showing said image from said projecting means to be parallel light and to enter said first lens array.
Claim 30
Dependent Claim
22 words
A projector according to claim 29, wherein each lens of said first and second lens array is composed of a cylindrical lens.
Claim 31
Dependent Claim
22 words
A projector according to claim 30, wherein each lens of said first lens array has a refractive surface formed as aspherical surface.
Claim 32
Dependent Claim
37 words
A projector according to claim 31, wherein each lens of said first lens array has a refractive surface of a shape whose curvature gradually increases as it leaves leaving away from the optical axis of each lens.
Claim 33
Dependent Claim
20 words
A projector according to claim 30, wherein each lens of said second lens array is composed of a biconvex lens.
Claim 34
Dependent Claim
24 words
A projector according to claim 30, wherein each lens of said second lens array is made of a medium having a refractive index distribution.
Claim 35
Dependent Claim
65 words
A projector according to claim 30, wherein said sheet has an array of a plurality of biconvex cylindrical lenses and a transparent member bonded on said array so as to cover one surface of said array, and wherein said first lens array is constituted of the other surface of said array, and said second lens array is constituted of said one surface of said array.
Claim 36
Dependent Claim
23 words
A projector according to claim 35, wherein each cylindrical lens of said array is made of a medium having a refractive index distribution.
Claim 37
Dependent Claim
26 words
A projector according to claim 30, wherein said first lens array and said second lens array constitute a substantially telecentric system on the light emergent side.
Claim 38
Dependent Claim
34 words
A projector according to claim 37, wherein the optical axis of each lens of said first lens array and that of each lens of said second lens array are substantially coincident with each other.
Claim 39
Dependent Claim
146 words
A projector comprising: means for projecting an image; and a screen for receiving said image, and wherein said screen comprises a Fresnel lens sheet and a lenticular lens sheet in order from the side of said projecting means, said Fresnel lens sheet allowing the principal light beam of flux showing said image from said projecting means to be parallel light, and directing the light flux showing said image on to said lenticular lens sheet, and wherein said lenticular lens sheet allows the light flux showing said image to be diffused at least within a horizontal surface, and said lenticular lens sheet has a first cylindrical lens array on a surface of said Fresnel lens sheet side, and a second cylindrical lens array in the interior thereof, each lens of said cylindrical lens array being arranged in correspondence with each lens of said first cylindrical lens array.
Claim 40
Dependent Claim
30 words
A projector according to claim 39, wherein said projecting means comprises at least three projecting optical systems for projecting each image of red, green and blue on to said screen.
Claim 41
Dependent Claim
23 words
A projector according to claim 40, wherein each lens of said first cylindrical lens array has a refractive surface formed as aspherical surface.
Claim 42
Dependent Claim
37 words
A projector according to claim 41, wherein each lens of said first cylindrical lens array has a refractive surface of a shape whose curvature gradually increases as it leaves away from the optical axis of each lens.
Claim 43
Dependent Claim
21 words
A projector according to claim 40, wherein each lens of said second cylindrical lens array is composed of a biconvex lens.
Claim 44
Dependent Claim
25 words
A projector according to claim 40, wherein each lens of said second cylindrical lens array is made of a medium having a refractive index distribution.
Claim 45
Dependent Claim
69 words
A projector according to claim 40, wherein said lenticular lens sheet has an array of a plurality of biconvex cylindrical lenses and a transparent member bonded on said array so as to cover one surface of said array, and wherein said first cylindrical lens array is constituted of the other surface of said array, and said second cylindrical lens array is constituted of said one surface of said array.
Claim 46
Dependent Claim
24 words
A projector according to claim 45, wherein each biconvex cylindrical lens of said array is made of a medium having a refractive index distribution.
Claim 47
Dependent Claim
28 words
A projector according to claim 40, wherein said first cylindrical lens array and said second cylindrical lens array constitute a substantially telecentric system on the light emergent side.
Claim 48
Dependent Claim
36 words
A projector according to claim 47, wherein the optical axis of each lens of said first cylindrical lens array and that of each lens of said second cylindrical lens array are substantially coincident with each other.
Claim 49
Dependent Claim
29 words
A projector comprising: means for projecting an image; and a screen for receiving said image, said screen having a sheet formed with a lens array in the interior thereof.
Claim 50
Dependent Claim
30 words
A projector according to claim 49, wherein said projecting means comprises at least three projecting optical systems for projecting each image of red, green and blue on to said screen.
References Cited (Backward Citations)
No citation records indexed.
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