EP0403081A1
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Colour display
Assignee: Crosfield Electronics Ltd
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Filing: 1990-05-17
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Granted: —
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Expires: 2010-05-17
Abstract
Abstract A method of displaying a selected section of an N-dimensional colour space uses two memories (14,16) the first memory (14) stores memory addresses of the second (16). The second memory (16) stores data defining colour at addresses corresponding to the selected section and background colour at all other addresses. The defined colours and background are output to a display (11) so that the background areas blend with the existing background and only the colour of the selected section is redrawn not the whole image.
Inventors
- 👤 Lindsay Macdonald
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-03 06:22
CPC Classifications
G; G06; G06F; G06F3/00; G06F3/01; G06F3/048; G06F3/0484; G06F3/04845; G09; G09G; G09G5/00; G09G5/02; G09G5/06
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
120 words
A method of displaying in respective regions of a display the colours defined by a selected section of an N-dimensional colour space, the method comprising a preliminary step of storing in a first memory 14, for each region, an address of a second memory 16; subsequently determining the section of the colour space to be displayed, storing at each address in the second memory 16 corresponding to a region which is to display a colour of the selected section data defining the colour and at each address corresponding to an unused region data defining a background colour; and displaying in the display 11 the colours defined in the second memory 16 in the corresponding regions and elsewhere the background colour.
Claim 2
Independent Claim
120 words
A method of displaying in respective regions of a display the colours defined by a selected section of an N-dimensional colour space, the method comprising a preliminary step of storing in a first memory 14, for each region, an address of a second memory 16; subsequently determining the section of the colour space to be displayed, storing at each address in the second memory 16 corresponding to a region which is to display a colour of the selected section data defining the colour and at each address corresponding to an unused region data defining a background colour; and displaying in the display 11 the colours defined in the second memory 16 in the corresponding regions and elsewhere the background colour.
Claim 3
Dependent Claim
138 words
Apparatus for displaying a selected section of an N-dimensional colour space comprising a display 11 after displaying in respective regions of the display the colours defined by the selected section; a first memory 14 and a second memory 16, the first memory 14 storing, for each region, an address of the second memory 16; and a processor 12 for selecting under operator control a section of the colour space to be displayed, the processor 12 storing at each address in the second memory 16 corresponding to a region which is to display a colour of the selected section data defining the colour and at each address corresponding to an unused region data defining a background colour; and displaying on the display the colours defined in the second memory 16 in the corresponding regions and elsewhere the background colour.
Claim 4
Dependent Claim
138 words
Apparatus for displaying a selected section of an N-dimensional colour space comprising a display 11 after displaying in respective regions of the display the colours defined by the selected section; a first memory 14 and a second memory 16, the first memory 14 storing, for each region, an address of the second memory 16; and a processor 12 for selecting under operator control a section of the colour space to be displayed, the processor 12 storing at each address in the second memory 16 corresponding to a region which is to display a colour of the selected section data defining the colour and at each address corresponding to an unused region data defining a background colour; and displaying on the display the colours defined in the second memory 16 in the corresponding regions and elsewhere the background colour.
Claim 5
Dependent Claim
16 words
Apparatus according to claim 2, in which the N-dimensional colour space is a three-dimensional colour space.
Claim 6
Dependent Claim
18 words
Apparatus according to claim 2 in which the selected section displayed of the N-dimensional colour space is two-dimensional.
Claim 7
Dependent Claim
20 words
Apparatus according to claim 2, in which the first memory 14 is in the form of a raster frame store.
Claim 8
Dependent Claim
19 words
Apparatus according to claim 2, in which the second memory 16 is in the form of a look-up table.
Claim 9
Dependent Claim
21 words
Apparatus according to claim 2, in which the display 11 is in the form of a cathode ray tube video monitor.
References Cited (Backward Citations)
US4751446A
Cited
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