Patent US6009437A successfully refreshed from Google Patents.
EP0606162A2
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EP
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Image display system with pixel mosaic pattern
Assignee: Sony Corp
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Filing: 1994-01-06
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Granted: —
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Expires: 2014-01-06
Abstract
Abstract The apparatus resolution of an image displayed on an image display system is increased without increasing the number of actual pixels which are arranged in horizontal rows and vertical columns and selectively energizable to display an image composed of a plurality of pixel patterns in alternate fields. An optical path changer (30) is positioned between the image display system and a viewer or screen for shifting an optical path therebetween to optically shift a pixel pattern. The optical path changer is operated to shift the optical path, and the pixel pattern to be optically shifted is displayed on the image display system in every field in synchronism with the shifting of the optical path by the optical path changer.
Inventors
- 👤 Yoshiki Sony Corporation Shirochi
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-09 11:39
CPC Classifications
C; C03; C03B; C03B37/00; C03B37/01; C03B37/012; C03B37/014; C03B37/01486; G; G02; G02F; G02F1/00; G02F1/01; G02F1/13; G02F1/133; G02F1/1333; G02F1/1335; G02F1/133504; G09; G09G; G09G3/00; G09G3/001; G09G3/007; G09G3/20; G09G3/34; G09G3/36; G09G5/00; H; H04; H04N; H04N23/00; H04N23/60; H04N23/68; H04N23/682; H04N23/685; H04N23/686; H04N23/687; H04N3/00; H04N3/10; H04N3/12; H04N3/127; H04N5/00; H04N5/74; H04N5/7416; H04N5/7441; H04N5/76; H04N5/765; H04N5/77; H04N5/91; H04N5/92; H04N5/9201; H04N5/9206; H04N9/00; H04N9/12; H04N9/30; G02F1/13363; G02F1/1347; G02F1/13471
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
108 words
A method of increasing the resolution of an image on an image display system having an array of pixels selectively energizable to display an image composed of pixel patterns in alternate fields, comprising the steps of: positioning an optical path changer between the image display system and a viewer or screen for shifting an optical path therebetween to optically shift the apparent position of the pixel pattern; operating said optical path changer to shift said optical path; and displaying the pixel pattern to be optically shifted on said image display system in every field in synchronism with the shifting of said optical path by said optical path changer.
Claim 2
Dependent Claim
39 words
A method according to claim 1, wherein said optical path is shifted in one direction by 1/2 of the pitch of the pixels and in a transverse direction by 1/4 of the pitch of pixels of the same color.
Claim 3
Dependent Claim
99 words
A method according to claim 1 or 2, wherein said step of displaying the pixel pattern comprises the steps of: shifting a horizontal clock signal of said image display system out of phase with a horizontal synchronizing signal of image information supplied thereto in conformity with sampled positions on the displayed image when the optical path is shifted horizontally; and shifting a vertical clock signal of said image display system out of phase with a vertical synchronizing signal of image information supplied thereto in conformity with sampled positions on the displayed image when the optical path is shifted vertically.
Claim 4
Dependent Claim
47 words
A method according to claim 1, 2 or 3 wherein said optical path changer comprises a refractive member, said step of operating the optical path changer comprising the step of moving said refractive member into and out of said optical path thereby to shift the optical path.
Claim 5
Dependent Claim
53 words
A method according to claim 1, 2 or 3 wherein said optical path changer comprises a member including a region having a different refractive index, said step of operating the optical path changer comprising the step of moving said region into said optical path in alternate fields thereby to shift the optical path.
Claim 6
Dependent Claim
93 words
A method according to claim 1, 2 or 3 wherein said optical path changer comprises optical means for changing the plane of polarization of light from said image display system and a birefringent member for passing light from said optical means therethrough, said step of operating the optical path changer comprising the step of operating said optical means to change said plane of polarization in every field so that the light whose plane of polarization has been changed by said optical means passes through said birefringent member thereby to shift the optical path.
Claim 7
Dependent Claim
52 words
A method according to claim 1, 2 or 3 wherein said optical path changer comprises an active prism for passing light from said image display system therethrough, said step of operating the optical path changer comprising the step of actuating said active prism in every field thereto to shift the optical path.
Claim 8
Dependent Claim
89 words
An image display system comprising: an image display device having an array of pixels selectively energizable to display an image composed of a plurality of pixel patterns in alternate fields; an optical path changer disposed between said image display device and a viewer or screen for shifting an optical path therebetween to optically shift the apparent position of the pixel patterns; and shifting means for shifting pixel patterns displayed on said image display device in timed relation to the change of the optical path by said optical path changer.
Claim 9
Dependent Claim
132 words
An image display system according to claim 8, wherein said image display device comprises: horizontal scanning means for successively scanning rows of pixels with a horizontal clock signal; vertical scanning means for successively scanning columns of pixels with a vertical clock signal; generating means for generating said horizontal clock signal; generating means for generating said vertical clock signal; shifting means for shifting said horizontal clock signal in every field out of phase with a horizontal synchronizing signal of the image information in timed relation to the changing of the optical path by said optical path changer and/or shifting said vertical clock signal in every field out of phase with a vertical synchronizing signal of the image information in timed relation to the changing of the optical path by said optical path changer.
Claim 10
Dependent Claim
107 words
An image display system according to claim 8 or 9, wherein said optical path changer comprises a circular member having a rotatable shaft at its own central axis and including circumferentially alternate regions for deflecting the optical path by respective different quantities, said circular member being disposed across the optical path between said image display device and the viewer or screen, whereby said rotatable shaft can be rotated in synchronism with vertical scanning of said image display device to cause said circumferentially alternate regions of the circular member to move alternately into said optical path in every field of image information supplied to said image display device.
Claim 11
Dependent Claim
67 words
An image display system according to claim 8 or 9 wherein said optical path changer comprises a polarization plane rotator and a birefringent plate, said polarization plane rotator and said birefringent plate being arranged between said image display device and the viewer or screen such that light from said image display device passes successively through said polarization plane rotator and said birefringent plate in the order named.
Claim 12
Independent Claim
109 words
A method of increasing the resolution of an image on an image display system having a pair of projectors each having a liquid-crystal display device having a matrix of pixels for displaying an image in an interlaced scanned process and means for projecting the displayed image onto a screen, comprising the steps of: controlling one of the projectors to display only odd-numbered fields of image information on the screen; controlling the other of the projectors to display only even-numbered fields of image information on the screen; and shifting respective images projected onto said screen by said projectors vertically from each other by 1/2 of the pitch of the pixels.
Claim 13
Independent Claim
51 words
A method according to any one of claims 1 to 7 wherein said pixels are capable of continuously displaying the image until next image information is supplied to the pixels, and said shifting depends on the pixel pattern to be displayed in synchronism with vertical scanning on said image display system.
Claim 14
Dependent Claim
102 words
An imaging apparatus comprising: an imaging unit having a matrix of pixels for producing an image signal from all the pixels in every field in a non-interlaced scanning process; an optical path changer disposed between said imaging unit and a subject to be imaged by said imaging unit to shift an optical path therebetween; and actuator means for actuating said optical path changer to shift said optical path in a predetermined direction in every field or frame in response to a shock applied to said imaging unit, whereby the image signal generated by said imaging unit is free from suffering the shock.
Claim 15
Dependent Claim
101 words
A recording apparatus comprising: an imaging unit; an optical path changer disposed between said imaging unit and a subject to be imaged by said imaging unit to shift an optical path therebetween; means for controlling said optical path changer to shift the optical path in every field or frame; and means for recording, on a recording medium, a plurality of field images of the subject whose optical paths are shifted by said optical path changer and have different spatially sampled positions, together with information representative of a quantity by and a direction in which each of the field images is shifted.
Claim 16
Dependent Claim
86 words
A reproducing apparatus for playing back the recording medium which has been recorded by a recording apparatus according to claim 15, comprising: means for extracting the field images and the information representative of a quantity by and a direction in which each of the field images is shifted, from a reproduced signal supplied from the recording medium; and means for shifting the extracted field images vertically and horizontally based on the extracted information and combining the shifted field images into a still image of high resolution.
References Cited (Backward Citations)
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