EP0332268A1
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Display and pick-up device for stereoscopic picture display
Assignee: Koninklijke Philips NV
•
Filing: 1989-03-06
•
Granted: —
•
Expires: 2009-03-06
Abstract
Abstract For flickerless stereoscopic display, a liquid crystal (21) with orthogonally polarized columns, determined by the electrodes (26, 27, 28) and the polarizer (22), is placed in front of a light-sensitive pick-up unit CCD (23) in a 1:1 relation, on which two orthogonally polarized sub-pictures (13', 14') are projected. On the display side, the sub-pictures (32) are read via an LCD (36) by means of orthogonally polarized glasses (42, 43) so that the pixels, for a line of the stereoscopic display, are provided alternatively for the right and left eye.
Inventors
- 👤 Antonius Gerardus Hendrikus Verhulst
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-29 06:08
CPC Classifications
H; H04; H04N; H04N13/00; H04N13/30; H04N13/332; H04N13/337; H04N13/20; H04N13/204; H04N13/207; H04N13/218
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
86 words
A display device for stereoscopic picture display in which information relating to sub-pictures is applied to the display device for displaying a picture composed of the sub-pictures in accordance with a fixed pattern, characterized in that the device comprises a liquid crystal layer between a picture-generating device and a transparent supporting plate, in which layer unidirectionally polarized light enters from the picture-generating device and in which the direction of polarization is changed at areas determined by the fixed pattern or a pattern which is complementary thereto.
Claim 2
Dependent Claim
86 words
A display device for stereoscopic picture display in which information relating to sub-pictures is applied to the display device for displaying a picture composed of the sub-pictures in accordance with a fixed pattern, characterized in that the device comprises a liquid crystal layer between a picture-generating device and a transparent supporting plate, in which layer unidirectionally polarized light enters from the picture-generating device and in which the direction of polarization is changed at areas determined by the fixed pattern or a pattern which is complementary thereto.
Claim 3
Dependent Claim
22 words
A display device as claimed in Claim 1, characterized in that the direction of polarization is rotated through substantially 90° or 270°.
Claim 4
Dependent Claim
28 words
A display device as claimed in Claim 1 or 2, characterized in that the liquid crystal layer comprises a twisted nematic liquid crystal or a ferro-electric liquid crystal.
Claim 5
Dependent Claim
50 words
A display device as claimed in Claim 1 or 2, characterized in that the picture-generating comprises an electro-optical medium arranged between a first and a second supporting plate at least one of which is transparent and in that the first and the second supporting plate are provided with control electrodes.
Claim 6
Dependent Claim
19 words
A display device as claimed in Claim 4, characterized in that the electro-optical medium is a liquid crystal layer.
Claim 7
Dependent Claim
39 words
A display device as claimed in Claim 5, characterized in that the liquid crystal layer rotates the direction of polarization of incident polarized light, dependent on the thickness of said layer and on the wavelength of incident polarized light.
Claim 8
Dependent Claim
30 words
A display device as claimed in Claim 6, characterized in that the device comprises an extra liquid crystal layer between two supporting plates for compensating the effects of unwanted birefringence.
Claim 9
Dependent Claim
26 words
A display device as claimed in any one of the preceding Claims 2 to 7, characterized in that the first supporting plate comprises a silicon substrate.
Claim 10
Dependent Claim
30 words
A display device as claimed in any one of the preceding Claims, characterized in that the fixed pattern comprises columns of pixels which are separated by complementary columns of pixels.
Claim 11
Dependent Claim
23 words
A display device as claimed in any one of Claims 1 to 9, characterized in that the fixed patern constitutes a chessboard-like pattern.
Claim 12
Dependent Claim
103 words
A pick-up device for stereoscopic display in which sub-pictures polarized in different directions are imaged through an optical system, characterized in that the pick-up device comprises a light-sensitive pick-up unit provided with picture pick-up elements corresponding to pixels, a liquid crystal layer between two supporting plates being arranged between the optical system and the memory device, in which layer the direction of polarization of at least one of the sub-pictures can be changed at areas determined by a fixed pattern or a pattern which is complementary thereto, and in that a polarizer is arranged between the liquid crystal layer and the pick-up unit.
Claim 13
Dependent Claim
103 words
A pick-up device for stereoscopic display in which sub-pictures polarized in different directions are imaged through an optical system, characterized in that the pick-up device comprises a light-sensitive pick-up unit provided with picture pick-up elements corresponding to pixels, a liquid crystal layer between two supporting plates being arranged between the optical system and the memory device, in which layer the direction of polarization of at least one of the sub-pictures can be changed at areas determined by a fixed pattern or a pattern which is complementary thereto, and in that a polarizer is arranged between the liquid crystal layer and the pick-up unit.
Claim 14
Dependent Claim
31 words
A pick-up device as claimed in Claim 11, characterized in that the optical system comprises a double lens system with mutually perpendicularly oriented polarizers being arranged in the associated light paths.
Claim 15
Dependent Claim
20 words
A pick-up device as claimed in Claim 11 or 12, characterized in that the pick-up unit comprises a charge-coupled device.
Claim 16
Dependent Claim
32 words
A pick-up device as claimed in any one of Claims 11 to 13, characterized in that the direction of polarization of at least one sub-picture is rotated through substantially 90° or 270°.
Claim 17
Dependent Claim
31 words
A pick-up device as claimed in any one of Claims 11 to 14, characterized in that the liquid crystal layer comprises a twisted nematic liquid crystal or a ferro-electric liquid crystal.
Claim 18
Dependent Claim
31 words
A pick-up device as claimed in any one of Claims 11 to 14, characterized in that the fixed pattern comprises columns of pixels which are separated by complementary columns of pixels.
Claim 19
Dependent Claim
23 words
A pick-up device as claimed in any one of Claims 11 to 14, characterized in that the fixed pattern constitutes a chessboard-like pattern.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
Maintenance schedule is calculated for granted US utility patents.