EP0782333A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Image display apparatus
Assignee: Hitachi Ltd
•
Filing: 1996-12-19
•
Granted: —
•
Expires: 2016-12-19
Abstract
Abstract The present invention aims at providing an image display apparatus capable of displaying both a television signal and an image signal supplied from a personal computer with a high picture quality on a high definition display unit (7) having 1024 by 768 pixels. In order to achieve this object, an image display apparatus according to the present invention includes an NTSC-VGA conversion circuit (4) for converting a television signal to a signal having 640 by 480 pixels and corresponding to the non-interlacing VGA standard, a switch unit (5) for selecting and outputting either the signal outputted from the NTSC-VGA conversion circuit and an inputted image signal from a personal computer, and a VGA-XGA conversion circuit (6) for converting a number of pixels of a signal outputted from the switch unit to a number of pixels 1024 by 768 substantially equivalent to the number of the display unit.
Inventors
- 👤 Yasuhiro Kasahara
- 👤 Takaaki Matono
- 👤 Koichi Sudo
- 👤 Makoto Kitamura
- 👤 Yasuhiro Tomita
- 👤 Kouichi Sugimoto
- 👤 Toshihiko Matsuzawa
- 👤 Fumiyoshi Akiyama
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-31 20:20
CPC Classifications
G; G09; G09G; G09G5/00; G09G5/003; G09G5/005; H; H04; H04N; H04N7/00; H04N7/01; H04N7/0135; H04N7/0137; H04N7/12; H04N7/122; H04N7/125; H04N9/00; H04N9/64; H04N9/641; G09G2310/00; G09G2310/02; G09G2310/0229; G09G2340/00; G09G2340/04; G09G2340/0407; G09G2340/12; G09G2340/125; G09G3/00; G09G3/20; G09G3/34; G09G3/36; G09G3/3611; G09G3/3648; G09G5/006
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
71 words
An image display apparatus capable of displaying images of a plurality of different image information signals, comprising: display means (7) having a larger number of pixels than the number of pixels of an inputted image information signal; and signal conversion means (4, 6) for converting said inputted image information signal to a signal having a signal form corresponding to said display means and supplying a resultant signal to said display means.
Claim 2
Dependent Claim
23 words
An image display apparatus according to claim 1, wherein said inputted image information signal is a television signal of a standard television system.
Claim 3
Dependent Claim
17 words
An image display apparatus according to claim 1, wherein said display means has 800 by 600 pixels.
Claim 4
Dependent Claim
17 words
An image display apparatus according to claim 1, wherein said display means has 1024 by 768 pixels.
Claim 5
Dependent Claim
134 words
An image display apparatus receiving image information signals of a plurality of signal forms as input signals and capable of displaying images respectively for said input signals, comprising: display means (7) having a number M of pixels, said M having a relation MN with respect to an image information signal included in said image information signals and provided with a largest number N of pixels per screen; and signal conversion means (4, 6) for converting each of said plurality of image information signals to an image information signal having a number of pixels per screen substantially equivalent to M and having a signal form corresponding to said display means, said image information signal fed from said signal conversion means being supplied to said display means and displayed on said display means as an image.
Claim 6
Dependent Claim
175 words
An image display apparatus receiving, as inputs thereof, a first image information signal and a second image information signal having a larger number of pixels per screen than said first image information signal and capable of displaying an image for each of said first and second image information signals, said image display apparatus comprising: display means (7) having a number of pixels larger than the number of pixels of said second image information signal; first signal conversion means (4) for converting the number of pixels of said first image information signal to a number of pixels substantially equivalent to the number of pixels of said second image information signal; switch means (5) for selecting and outputting either the image information signal converted in number of pixels by said first signal converson means or said inputted second image information signal; and second signal conversion means (6) for converting a number of pixels of an image information signal outputted from said switch means to a number of pixels substantially equivalent to the number of said display means.
Claim 7
Dependent Claim
157 words
An image display apparatus receiving as inputs a television signal of the NTSC system and an image information signal having 640 by 480 pixels and corresponding to the non-interlacing VGA standard outputted from a personal computer and capable of displaying an image for each of said television signal and said image information signal, said image display apparatus comprising: display means (7) having 1024 by 768 pixels and corresponding to the non-interlacing XGA standard; an NTSC-VGA conversion circuit (4) for converting said television signal to a signal having 640 by 480 pixels and corresponding to the non-interlacing VGA standard; switch means (5) for selecting and outputting either the signal outputted from said NTSC-VGA conversion circuit and said inputted image information signal; and a VGA-XGA conversion circuit (6) for converting a number of pixels of a signal outputted from said switch means to a number of pixels 1024 by 768 substantially equivalent to the number of said display means.
References Cited (Backward Citations)
JPH07123368A
Cited
USPTO Annuity & Maintenance Windows
Maintenance schedule is calculated for granted US utility patents.