Patent EP0104431A2 successfully refreshed from Google Patents.
EP0104431A2
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Image display system
Assignee: Toshiba Corp
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Filing: 1983-08-23
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Granted: —
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Expires: 2003-08-23
Abstract
Abstract An image display system is disclosed which includes an image filing device (10) to pre-store data on the entire area of a large sized image; a CRT unit (14) to partially display this large sized image on its display screen at the same scale; and an image memory (12) to temporarily store a partial image of the large sized image, that will be displayed on this CRT (14) as well as its ambient image. When display area scrolling is directed by a scroll direction input device (22), image information which is newly required due to the given scrolling operation is read out under the control of the CPU (30), and the unneccessary image information is rewritten, being replaced by the new image information, with semi-realtime, in the memory area in which the image information which became useless due to the scrolling operation has been stored in the image memory (12). Thus, the display image area concerning the scroll and its ambient image area always prepared in the image memory (12), thereby allowing for a smooth scrolling operation.
Inventors
- 👤 Nobuo Sawada
- 👤 Masatsugu Kidode
- 👤 Hidenori Shinoda
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-09 21:32
CPC Classifications
G; G09; G09G; G09G5/00; G09G5/34; G09G5/346
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
328 words
An image display system comprising first memory means (10) for stably storing the entire area of an original image (C), display means (14) having a predetermined limited display screen for partially displaying said original image (C) on said display screen, characterized in that said system further comprises second memory means (12) provided between said first memory means (10) and said display means (14) for temporarily storing first image information (B) consisting of second image information (A) corresponding to a partial image of said original image (C) to be actually displayed on the screen of said display means (14), and third image information corresponding to an ambient image included in a predetermined ambient area of said partial image, scroll direction input means (22) operated manually by an operator, for producing an electrical scroll direction command signal (24) to specify the relative movement of a display area on said display screen for an arbitrary shift amount ( A x, A y), throughout the entire area of said original image (C), in any direction, and control means (30), electrically connected to said scroll direction input means (22) and to said first and second memory means (10, 12), for performing the scroll control operation in such a manner as to newly read out from said first memory means (10) fourth image information (M 2 ) other than said first image information (B) which will be lacking due to the scroll of said display area in said second memory means (12), eliminate from said second memory means (12) fifth image information (M l ) which will be surplus due to the scroll of said display area in said second memory means (12) and which is included in said first image information (B), and store said fourth image information (M 2 ), in place of said fifth image information (M l ), in the memory address in which the fifth image information (M l ) has been stored in said second memory means (12).
Claim 2
Dependent Claim
328 words
An image display system comprising first memory means (10) for stably storing the entire area of an original image (C), display means (14) having a predetermined limited display screen for partially displaying said original image (C) on said display screen, characterized in that said system further comprises second memory means (12) provided between said first memory means (10) and said display means (14) for temporarily storing first image information (B) consisting of second image information (A) corresponding to a partial image of said original image (C) to be actually displayed on the screen of said display means (14), and third image information corresponding to an ambient image included in a predetermined ambient area of said partial image, scroll direction input means (22) operated manually by an operator, for producing an electrical scroll direction command signal (24) to specify the relative movement of a display area on said display screen for an arbitrary shift amount ( A x, A y), throughout the entire area of said original image (C), in any direction, and control means (30), electrically connected to said scroll direction input means (22) and to said first and second memory means (10, 12), for performing the scroll control operation in such a manner as to newly read out from said first memory means (10) fourth image information (M 2 ) other than said first image information (B) which will be lacking due to the scroll of said display area in said second memory means (12), eliminate from said second memory means (12) fifth image information (M l ) which will be surplus due to the scroll of said display area in said second memory means (12) and which is included in said first image information (B), and store said fourth image information (M 2 ), in place of said fifth image information (M l ), in the memory address in which the fifth image information (M l ) has been stored in said second memory means (12).
Claim 3
Dependent Claim
100 words
An image display system according to claim 1, characterized in that said first memory means comprises: an image filing device (10) which files said original (C) image so as to divide said original image (C) into a plurality of areas of unit images (Cij) and make two kinds of image information (Cij( X ) ' C ij(Y)) obtained by scanning each of said unit images (Cij) respectively in a first and a second scanning direction (X, Y) and to doubly store said two image information (C ij(X) , C ij(Y) , with respect to each of said unit images (Cij).
Claim 4
Dependent Claim
164 words
An image display system according to claim 1, characterized in that said first memory means comprises: an image filing device (10) which files said original image (C) in such a manner as to arrange said original image (C) in the row and column directions and in a substantially matrix shape and divide said image (C) into a plurality of unit images (Cij) each of which is not smaller than the area (B) of said display screen, independently scan each of said unit images (Cij) in the row and column scanning directions each corresponding to a first and a second axis direction (X, Y) of the orthogonal coordinate system to be applied to define the direction of said display area scroll, thereby providing row direction scanning image information (C ji(x) ) and column direction scanning image information (C ij(Y) ), and doubly store using the two image information (Cij( X ) ' Cij(y)) to be scanned with respect to each of said unit images (Cij).
Claim 5
Dependent Claim
99 words
An image display system according to claim 2 or 3, characterized in that to extract said fourth image information (M 2 ) from said image filing device (10) at a high rate of speed, said control means (30) selects one kind of image information having a scanning direction which is more preferable to read out said fourth image information (M 2 ) between said two kinds of image information (Cij( X ), Cij(y)) corresponding to at least one unit image including said fourth image information (M 2 ) among said unit images (Cij) divided from said original image (C).
Claim 6
Dependent Claim
63 words
An image display system according to claim 4, characterized in that said scroll direction input means (22) produces said scroll direction command signal (24) which continuously represents a display area scroll varying with according to the operator's desired processing; and said control means comprises a central processing unit (30) for repeatedly excuting said scroll control to fully adhere to said continuous scroll directions.
Claim 7
Dependent Claim
118 words
An image display system according to claim 5, characterized in that said central processing unit (30) performs coordinate transformation processing from a first coordinate system (X-Y) to a second coordinate system (U-V) in such a manner as to define the memory area of said image filing device (10) using said first coordinate system (X-Y) to acknowledge the positions of said plurality of unit images (Cij) of said original image (C) and define the memory address of said second memory means (12) using said second coordinate system (U-V), and to compute the extent of said fourth image information (M 2 ) to be read out from said image filing device (10) using said first coordinates (X-Y) as a mode.
Claim 8
Independent Claim
229 words
A method for moving the display area of a display device (14) which partially displays a predetermined original image (C) in a desired direction over the entire area of said original image (C), characterized by comprising the steps of accessing and extracting, from said original image (C), first image information (B) consisting of second image information corresponding to a partial image of said original image (A) to be actually displayed on a screen of said display device (14) and third image information corresponding to an ambient image included in a predetermined ambient area (B) of said partial image of said original image (C), temporarily storing said first image information and supplying said second image information to said display device (14), newly extracting, from said original image (C), fourth image information (M 2 ) other than said first image information (B) which will be lacking upon execution of the display area scrolling operation to be directed by an operator, and replacing fifth image information (M l ) which is surplus due to said display area scrolling operation and which is included in said first image information (B) by said fourth image information (M 2 ), and storing said fourth image information replaced (M 2 ), thereby providing a new partial image of said original image (B'), which will be displayed on said display screen after scrolling and its ambient image.
Claim 9
Independent Claim
229 words
A method for moving the display area of a display device (14) which partially displays a predetermined original image (C) in a desired direction over the entire area of said original image (C), characterized by comprising the steps of accessing and extracting, from said original image (C), first image information (B) consisting of second image information corresponding to a partial image of said original image (A) to be actually displayed on a screen of said display device (14) and third image information corresponding to an ambient image included in a predetermined ambient area (B) of said partial image of said original image (C), temporarily storing said first image information and supplying said second image information to said display device (14), newly extracting, from said original image (C), fourth image information (M 2 ) other than said first image information (B) which will be lacking upon execution of the display area scrolling operation to be directed by an operator, and replacing fifth image information (M l ) which is surplus due to said display area scrolling operation and which is included in said first image information (B) by said fourth image information (M 2 ), and storing said fourth image information replaced (M 2 ), thereby providing a new partial image of said original image (B'), which will be displayed on said display screen after scrolling and its ambient image.
Claim 10
Dependent Claim
93 words
A method according to claim 7, characterized by further comprises the steps of dividing said original image (C) into a plurality of unit images (Cij), respectively scanning each of said unit images (Cij) in a first and a second scanning direction (X, Y) to create two kinds of image information (C ij(X) , C ij(Y) ) to be scanned, and filing said original image (C) in such a way as to doubly store said two image information (C ij(x) , C ij(Y) ) to be scanned for each of said unit images (Cij).
Claim 11
Dependent Claim
98 words
A method according to claim 8, characterized in that said step of newly extracting said fourth image information (M 2 ) includes: a step of selecting one kind of image information having its scanning direction which is more preferable to read out the fourth image information (M 2 ) between said two kinds of image information (Cij( X ), Cij(y)) corresponding to at least one unit image including said fourth image information among said unit images (Cij) devided from said original image (C), thereby extracting fourth image information from the original image at a high rate of speed.
References Cited (Backward Citations)
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