EP0597629A1
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Display
Assignee: Sharp Corp
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Filing: 1993-11-04
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Granted: —
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Expires: 2013-11-04
Abstract
Abstract An auto stereoscopic 3D display comprises a hybrid sandwich (11) comprising a first lenticular screen (12), a spatial light modulator (13), a diffuser (14), and second lenticular screen (16). A plurality of light sources (1 to 4) produce in turn divergent light beams which are modulated by the modulator (13) with two interlaced views. The hybrid sandwich (11) projects the views in different directions towards an observer (17). The different 2D views are thus visible from directions corresponding to the directions in which the views were captured during recording of a 3D image. Each eye of the observer (17) sees a single view across the whole of the display.
Inventors
- 👤 Graham John Woodgate
- 👤 David Ezra
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-09 16:45
CPC Classifications
G; G09; G09F; G09F19/00; G09F19/12; G09F19/14; G02; G02B; G02B30/00; G02B30/20; G02B30/26; G02B30/27; G09F19/125; H; H04; H04N; H04N13/00; H04N13/30; H04N13/302; H04N13/32; H04N13/305; H04N13/31
Claims Analysis
Total Claims: 20
Claim 1
Independent Claim
157 words
A display for producing an autostereoscopic image, comprising at least one light source (1-4) for producing a divergent beam of light, and a spatial light modulator (13) comprising a plurality of light modulating cells for modulating light passing therethrough from the at least one light source (1-4) in accordance with image data, characterised by: a first array (12, 22) of lenses or apertures arranged to receive the divergent light beam from the or each light source (1-4), each of the lenses or apertures being arranged to produce an image of the or each light source (1-4) at a common image plane such that each image is laterally displaced by a respective predetermined amount from an optical axis of the corresponding lens or aperture and the respective predetermined amounts vary progressively across the common image plane; and a second array (16, 23) of lenses or apertures having a common object plane which coincides with the common image plane.
Claim 2
Dependent Claim
35 words
A display as claimed in Claim 1, characterised in that the first array of lenses (12) or apertures (22) is located between the at least one light source (1-4) and the spatial light modulator (13).
Claim 3
Dependent Claim
35 words
A display as claimed in Claim 1, characterised in that the spatial light modulator (13) is located between the at least one light source (1-4) and the first array of lenses (12) or apertures (22).
Claim 4
Dependent Claim
24 words
A display as claimed in any one of the preceding claims, characterised in that the lenses of the first array (12) are converging lenses.
Claim 5
Dependent Claim
24 words
A display as claimed in any one of the preceding claims, characterised in that the lenses of the second array (16) are converging lenses.
Claim 6
Dependent Claim
31 words
A display as claimed in Claim 5 when dependent on Claim 4, characterised in that the first and second arrays (12, 16) comprise first and second lenticular screens (12, 16), respectively.
Claim 7
Dependent Claim
31 words
A display as claimed in Claim 6, characterised in that each of the first and second lenticular screens (12, 16) comprises a plurality of parallel elongate lenticules having cylindrical convergent properties.
Claim 8
Dependent Claim
29 words
A display as claimed in Claim 7, characterised in that the at least one light source (1-4) comprises a linear array of light sources extending perpendicularly to the lenticules.
Claim 9
Dependent Claim
32 words
A display as claimed in Claim 5 when dependent on Claim 4, characterised in that the first and second arrays (12, 16) comprise first and second two dimensional arrays of lenses, respectively.
Claim 10
Dependent Claim
24 words
A display as claimed in Claim 9, characterised in that the lenses of the first and second arrays (12, 16) have spherical convergent properties.
Claim 11
Dependent Claim
27 words
A display as claimed in Claim 9 or 10, characterised in that the at least one light source (1-4) comprises a two dimensional array of light sources.
Claim 12
Dependent Claim
42 words
A display as claimed in any one of the preceding claims, characterised in that the pitch of the lenses or apertures of the first array (12, 22) is substantially equal to the pitch of the cells of the spatial light modulator (13).
Claim 13
Dependent Claim
39 words
A display as claimed in Claim 12, characterised in that the pitch of the lenses or apertures of the second array (16, 23) is greater than the pitch of the lenses or apertures of the first array (12, 22).
Claim 14
Dependent Claim
49 words
A display as claimed in Claim 13, characterised in that the pitch of the lenses or apertures of the second array (16, 22) is substantially equal to the product of the pitch of the lenses or apertures of the first array (12, 22) and an integer greater than 1.
Claim 15
Dependent Claim
24 words
A display as claimed in any one of the preceding claims, characterised in that a diffuser (14) is disposed at the common image plane.
Claim 16
Dependent Claim
25 words
A display as claimed in any one of Claims 1 to 14, characterised in that a field lens is disposed at the common image plane.
Claim 17
Dependent Claim
24 words
A display as claimed in any one of the preceding claims, characterised in that the spatial light modulator (13) comprises a liquid crystal device.
Claim 18
Dependent Claim
46 words
A display as claimed in any one of the preceding claims, characterised in that the at least one light source (1-4) comprises a plurality of light sources (1-4) and in that each of the light sources is contiguous with the or each adjacent light source (1-4).
Claim 19
Dependent Claim
20 words
A display as claimed in Claim 18, characterised by further comprising control means (9) for sequentially illuminating the light sources.
Claim 20
Dependent Claim
47 words
A display as claimed in Claim 19, characterised in that the control means (9) is arranged to control the spatial light modulator (13) in accordance with a plurality of sequentially presented images representing a frame of a three dimensional image, each image comprising at least one view.
References Cited (Backward Citations)
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