EP0431618A2
Expired / Lapsed
EP
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Method and apparatus for multiwindow display with enhanced window manipulation facilities
Assignee: Toshiba Corp
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Filing: 1990-12-06
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Granted: —
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Expires: 2010-12-06
Abstract
Abstract A method and an apparatus for multi-window display with enhanced window manipulation facilities. In the apparatus, window images to be displayed in multi-window display are stored in a bit map memory (12); various image processing operations are performed on the window images stored in the bit map memory (12), by regarding the window images as graphic images; appropriate sections of processed window images are transferred to a frame buffer (23) by using a bit block transfer device (111); and the image in the frame buffer (23) is displayed on a display device (24).
Inventors
- 👤 Yoshinori Kuno
- 👤 Hiroshi Mizoguchi
- 👤 Minoru Ishikawa
- 👤 Hiroaki Kubota
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-31 06:02
CPC Classifications
G; G09; G09G; G09G5/00; G09G5/14
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
96 words
A multi-window display apparatus, comprising: display means having a display screen; frame buffer means for storing images to be displayed on the display screen of the display means; bit map memory means for storing window images to be displayed in multi-window display; image processing means for performing various image processing operations on the window images stored in the bit map memory means, by regarding the window images as graphic images; and graphics controller including bit block transfer means for transferring appropriate sections of window images processed by the image processing means to the frame buffer means.
Claim 2
Dependent Claim
37 words
The apparatus of claim 1, wherein the bit map memory means has figure manipulation bits for indicating different regions in each window image, where the different regions are to be processed independently by the image processing means.
Claim 3
Dependent Claim
47 words
The apparatus of claim 2, wherein the bit map memory means has a multiple bit plane structure, in which a set of bit planes are used as the figure manipulation bits, while other bit planes are used for storing values of picture elements of the window images.
Claim 4
Dependent Claim
28 words
The apparatus of claim 2, wherein the graphics controller further includes means for controlling the transferring by the bit block transfer means, according to the figure manipulation bits.
Claim 5
Dependent Claim
24 words
The apparatus of claim 2, wherein a plurality of the different regions can be processed collectively as a group by the image processing means.
Claim 6
Independent Claim
81 words
A method of multi-window display, comprising the steps of: storing window images to be displayed in multi-window display in bit map memory means; performing various image processing operations on the window images stored in the bit map memory means, by regarding the window images as graphic images; and transferring appropriate sections of window images processed at the performing step to frame buffer means by using bit block transfer means; and displaying the image in the frame buffer means on display means.
Claim 7
Dependent Claim
36 words
The method of claim 6, wherein the bit map memory means has figure manipulation bits for indicating different regions in each window image, where different regions are to be image processed independently at the performing step.
Claim 8
Dependent Claim
47 words
The method of claim 7, wherein the bit map memory means has a multiple bit plane structure, in which a set of bit planes are used as the figure manipulation bits, while other bit planes are used for storing values of picture elements of the window images.
Claim 9
Dependent Claim
25 words
The method of claim 7, further including the step of controlling the transferring by the bit block transfer means, according to the figure manipulation bits.
Claim 10
Dependent Claim
23 words
The method of claim 7, wherein a plurality of the different regions can be processed collectively as a group at the performing step.
References Cited (Backward Citations)
No citation records indexed.
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