Patent EP0295689A2 successfully refreshed from Google Patents.
EP0295689A2
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EP
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Display controller for CRT/plasma display apparatus
Assignee: Toshiba Corp
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Filing: 1988-06-16
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Granted: —
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Expires: 2008-06-16
Abstract
Abstract In a system which has a plasma display as a standard unit, and to which a color display unit can be arbitrarily connected, a CRT pallet data buffer (5) and a plasma display unit (PDP) pallet data buffer (7) are connected to a CPU (1) via a system bus (3). CRT and PDP default values of pallet data set in the buffers (5, 7) are stored in a BIOS·ROM (17), and are read out therefrom by the CPU (1) and are set in buffers (5, 7), respectively. When a CRT display unit (19) or a PDP (21) is selected by way of a keyboard (16) operation, the CPU (1) reads out the pallet data from the corresponding buffer (5 or 7), and loads it into a pallet (13). A CRT controller (25) then causes the selected display unit (CRT or PDP) to display the pallet data set in the pallet (13).
Inventors
- 👤 Hiroki C/O Patent Division Zenda
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-30 05:23
CPC Classifications
G; G09; G09G; G09G1/00; G09G3/00; G09G3/20; G09G3/2007; G06; G06F; G06F3/00; G06F3/14; G06F3/1423; G06F3/1431; G09G5/00; G09G5/02; G09G5/06; G09G5/36; G09G5/363; G09G5/366; G09G2320/00; G09G2320/02; G09G2320/0271; G09G2320/06; G09G2320/0626; G09G2360/00; G09G2360/02; G09G3/22; G09G3/28
Claims Analysis
Total Claims: 20
Claim 1
Independent Claim
118 words
A display controller for a CRT/plasma display apparatus, which selectively drives a cathode ray tube (CRT) display apparatus (19) and a plasma display apparatus (21), comprising: pallet means (13, 12, 14) in which display color conversion pallet data of said CRT display apparatus (19) or gradation display pallet data for said plasma display apparatus (21) is set; display apparatus selection means (1, 16, 17) for selecting one of said CRT and plasma display apparatuses (19, 21), as a display apparatus; CRT controller means (25) for causing the selected display apparatus to display the pallet data set in said pallet means (13); and pallet data setting means (1, 3, 17) for setting the pallet data in said pallet means.
Claim 2
Dependent Claim
118 words
A display controller for a CRT/plasma display apparatus, which selectively drives a cathode ray tube (CRT) display apparatus (19) and a plasma display apparatus (21), comprising: pallet means (13, 12, 14) in which display color conversion pallet data of said CRT display apparatus (19) or gradation display pallet data for said plasma display apparatus (21) is set; display apparatus selection means (1, 16, 17) for selecting one of said CRT and plasma display apparatuses (19, 21), as a display apparatus; CRT controller means (25) for causing the selected display apparatus to display the pallet data set in said pallet means (13); and pallet data setting means (1, 3, 17) for setting the pallet data in said pallet means.
Claim 3
Dependent Claim
20 words
A controller according to claim 1, characterized in that said pallet means (13, 12, 14) comprises a single pallet (13).
Claim 4
Dependent Claim
86 words
A controller according to claim 1, characterized in that a display timing parameter of the display apparatus selected by said display apparatus selection means is set in said CRT controller means (25), so that the pallet data is set in said pallet means (13) at a display timing corresponding to the display timing parameter, and said pallet data setting means (1, 3, 17) sets the display timing parameter corresponding to the display apparatus selected by said display apparatus selection means in said CRT controller means (25).
Claim 5
Dependent Claim
60 words
A controller according to claim 1, characterized by further comprising gradation alteration instruction means (1, 16, 17) for outputting a signal instructing alteration of the gradation, said pallet data setting means (1, 3, 17) altering the pallet data to be set in said pallet means (13) in response to the signal from said gradation alteration instruction means (1, 16, 17).
Claim 6
Dependent Claim
47 words
A controller according to claim 1, characterized in that said pallet means (13) receives data having color-display elements to be displayed on said CRT display apparatus (19), alters the data into a plurality of gradation data, and outputs the gradation data to said plasma display apparatus (21).
Claim 7
Dependent Claim
113 words
A controller according to claim 1, characterized by further comprising: first pallet data memory means (5) for storing multicolor display pallet data inherent to said color CRT display apparatus (19); second pallet data memory means (7) for storing gradation display pallet data inherent to said plasma display apparatus (21); and means (1, 3, 5, 7, 17) for setting the pallet data in said first and second pallet data memory means (5, 7), and for reading out the pallet data from the pallet data memory means (5, 7) corresponding to the display apparatus selected by said display apparatus selection means (1, 6, 17) and setting the readout pallet data in said pallet means (13).
Claim 8
Dependent Claim
125 words
A controller according to claim 1, characterized in that said pallet means (13, 12, 14) comprises: first pallet means (12), in which pallet data inherent to said color CRT display apparatus (19) is set, for performing color conversion; and second pallet means (14), in which pallet data inherent to said plasma display apparatus (21) is set, for performing color-to-gradation conversion, and said CRT controller means (25) causes said CRT and plasma display apparatuses to display the pallet data set in said first and second pallet means (12, 14) in response to a display request, and comprises means (1, 3, 17) for altering the pallet data set in said first and second pallet means (12, 14) in response to an alteration request of the pallet data.
Claim 9
Dependent Claim
51 words
A controller according to claim 1, characterized in that said CRT controller means (25) causes said CRT display apparatus (19) to display the pallet data set in said first pallet means (12), and causes said plasma display apparatus (21) to display the pallet data set in said second pallet means (14).
Claim 10
Dependent Claim
50 words
A controller according to claim 1, characterized in that said CRT controller means (25) causes the selected display apparatus (19 or 21) to display the pallet data set in the pallet means (12 or 14) corresponding to the display apparatus selected by said display apparatus selection means (1, 16, 17).
Claim 11
Dependent Claim
23 words
A controller according to claim 7, characterized in that separate I/O device addresses are respectively assigned to said first and second pallet means.
Claim 12
Dependent Claim
26 words
A controller according to claim 7, characterized by further comprising means (1, 3) for selectively supplying a common address to said first and second pallet means.
Claim 13
Dependent Claim
33 words
A controller according to claim 7 or 11, characterized by further comprising means (55, 57) for selectively performing write access of the pallet data into said first and second pallet means (12, 14).
Claim 14
Dependent Claim
42 words
A controller according to claim 7, characterized in that said second pallet means (14) is connected in series with said first pallet means (12), receives display data color-converted by said first pallet means (12) and performs color-to-gradation conversion of the display data.
Claim 15
Dependent Claim
38 words
A controller according to claim 13, characterized by further comprising: means (1, 3, 16, 17) for altering the pallet data set in said first and second pallet means in response to an alteration request of the pallet data.
Claim 16
Dependent Claim
34 words
A controller according to claim 13, characterized in that said second pallet means (14) corrects display luminance-gradation characteristics for said plasma display apparatus to be substantially equivalent to those for said CRT display apparatus.
Claim 17
Dependent Claim
147 words
A controller according to claim 1, characterized by further comprising: luminance level conversion means (1, 3, 16, DPDP(R), DPDP(N)) having a first mode for, when display pixel data displayed on said color CRT display apparatus have high and low luminance levels, setting the luminance levels of display pixel data displayed on said plasma display apparatus at high and low luminance levels, respectively, and a second mode for, when display pixel data displayed on said color CRT display apparatus have high and low luminance levels, inverting the luminance levels of the display pixel data displayed on said plasma display apparatus at low and high luminance levels, respectively, and characterized in that said CRT controller means (25) causes said CRT display apparatus to perform multicolor display and causes said plasma display apparatus to perform multi-gradation display in accordance with the luminance levels converted by said luminance level conversion means.
Claim 18
Dependent Claim
42 words
A controller according to claim 16, characterized in that said luminance level conversion means comprises single pallet means (13) in which display conversion pallet data for said CRT display apparatus or gradation display pallet data for said plasma display apparatus is set.
Claim 19
Dependent Claim
59 words
A controller according to claim 16, characterized in that said luminance level conversion means comprises: first pallet means (12), in which pallet data inherent to said color CRT display apparatus (19) is set, for performing color conversion; and second pallet means (14), in which pallet data inherent to said plasma display apparatus (21) is set, for performing color-to-gradation conversion.
Claim 20
Dependent Claim
40 words
A controller according to claim 16, characterized in that said luminance level conversion means alters the luminance level of a display pixel displayed on said plasma display apparatus to be a designated luminance level in accordance with a user's request.
References Cited (Backward Citations)
No citation records indexed.
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