Patent EP0447167A2 successfully refreshed from Google Patents.
EP0447167A2
Expired / Lapsed
EP
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Image display device
Assignee: Sony Corp
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Filing: 1991-03-12
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Granted: —
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Expires: 2011-03-12
Abstract
Abstract This invention is directed to an image display device including picture quality adjustment means adapted so that a switched one of an input video signal of a standard aspect ratio and an input video signal of a wide aspect ratio is inputted thereto, and display means of a wide aspect ratio screen for displaying an image of a video signal to which picture quality adjustment processing by said picture quality adjustment means is implemented, wherein a scheme is employed to alter characteristics such as sharpness adjustment processing, etc. applied to an input video signal, thereby permitting picture qualities of display images of various aspect ratios to be optimum, respectively.
Inventors
- 👤 Susumu Tsuchida
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-30 13:27
CPC Classifications
H; H04; H04N; H04N7/00; H04N7/01; H04N7/0117; H04N7/0122; H04N5/00; H04N5/14; H04N5/20; H04N5/205; H04N5/208; H04N5/44; H04N5/57; H04N9/00; H04N9/64; H04N9/642
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
100 words
1 An image display device for displaying a television signal in plural format comprising; first receiving means for receiving a first television signal of standard aspect ratio, second receiving means for receiving a second television signal of wide aspect ratio, detecting means for detecting a type of received television signals, display means having a screen of wide aspect ratio for displaying an image in dependency upon received television signal, and picture quality adjustment means for adjusting picture quality of displayed image in dependency upon a type of received television signal, said picture quality adjustment means including a sharpness adjustment means.
Claim 2
Dependent Claim
100 words
1 An image display device for displaying a television signal in plural format comprising; first receiving means for receiving a first television signal of standard aspect ratio, second receiving means for receiving a second television signal of wide aspect ratio, detecting means for detecting a type of received television signals, display means having a screen of wide aspect ratio for displaying an image in dependency upon received television signal, and picture quality adjustment means for adjusting picture quality of displayed image in dependency upon a type of received television signal, said picture quality adjustment means including a sharpness adjustment means.
Claim 3
Dependent Claim
64 words
2 An image display device according to claim 1, which further comprises time base compression processing means for implementing time base compression processing to said first television signal of standard aspect ratio, wherein said sharpness adjustment means is such that an emphasis frequency band of said first television signal is altered in dependency upon a compression ratio in said time base compression processing means.
Claim 4
Dependent Claim
33 words
3 An image display device according to claim 2, wherein said time base compression processing means is adapted to implement time base compression processing to said first television signal in a horizontal direction.
Claim 5
Dependent Claim
71 words
4 An image display device according to claim 1,2 or 3, further comprising means for displaying said first television signal on said screen as first mode, said first mode having a display patterns of display area for image signals and non display area for generating a masking signal, said non display area is an area which can be created by difference between said standard aspect ratio and said wide aspect ratio.
Claim 6
Dependent Claim
51 words
5 An image display device according to claim 1, 2, 3 or 4 further comprising, scanning control means for changing a quantity of scanning in a vertical direction of said display means, wherein contrast characteristic of contrast adjustment means is subjected to alteration control in dependency upon a quantity of scanning.
Claim 7
Dependent Claim
57 words
6 An image display device according to claim 5, further comprising means for displaying said first television signal on said screen as second mode, said second mode generating a display signal being scanned visibly in said display area on said screen and non display signal being scanned in the upper and lower portions of visible screen area.
Claim 8
Dependent Claim
46 words
7 An image display device according to claim 5 or 6, wherein said contrast adjustment means is adapted to adjust in second mode in such a manner that level of the contrast of said first television signal is higher than that of said second television signal.
Claim 9
Dependent Claim
31 words
8 An image display device according to any one of the preceding claims, wherein said standard aspect ratio is equal to 4:3 and said wide aspect ratio is equal to 16:9.
Claim 10
Dependent Claim
34 words
9 An image display according to any one of the preceding claims, wherein said first television signal is based on NTSC television format and said second television signal is based on MUSE television format.
Claim 11
Dependent Claim
26 words
10 An image display device according to any one of claims 1 to 9 wherein said first television signal is based on the PAL television format.
References Cited (Backward Citations)
No citation records indexed.
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