EP0295690A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Display area control system for plasma display apparatus
Assignee: Toshiba Corp
•
Filing: 1988-06-16
•
Granted: —
•
Expires: 2008-06-16
Abstract
Abstract A display area control system having a function of switching a display mode and inhibiting alteration of the switched display mode in a plasma display apparatus is provided. When a screen of the selected display mode is smaller than a physical screen of the plasma display apparatus, the screen is displayed at the center of the physical screen of the plasma display apparatus. A data non-display area on the physical screen is displayed at a low luminance level in correspondence with a boundary display of a CRT display apparatus, so that a non- display area of an effective display screen can be clearly distinguished from the data non-display area.
Inventors
- 👤 Hiroki C/O Patent Division K.K. Toshiba Zenda
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-04 05:45
CPC Classifications
G; G09; G09G; G09G1/00; G09G3/00; G09G3/20; G09G3/22; G09G3/28; G09G5/00; G09G5/36; G09G5/363; G09G5/366; G09G2310/00; G09G2310/02; G09G2310/0232; G09G2340/00; G09G2340/04; G09G2340/0407; G09G2340/0414; G09G2340/0421; G09G2340/0464; G09G2340/0485; G09G2360/00; G09G2360/02
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
162 words
A display area control system for a plasma display apparatus, which comprises a cathode ray tube (CRT) controller having a function of generating different display timing signals and displaying data in correspondence with different display resolutions, comprising: first memory means (5) for storing a plurality of parameters for generating the different display timing signals in correspondence with a plurality of display resolutions; second memory means (14) for storing the display timing signal generating parameter read out from said first memory means; display resolution designating means (23) for designating the display resolution; setting means (1), responsive to said display resolution designating means for designating the display resolution, for reading out the display timing signal generating parameter from said first memory means in correspondence with the designated display resolution and for setting the readout parameter in said second memory means; and inhibition means (19, 17, 15) for inhibiting said setting means from setting the display timing signal generating parameter in said second memory means.
Claim 2
Dependent Claim
162 words
A display area control system for a plasma display apparatus, which comprises a cathode ray tube (CRT) controller having a function of generating different display timing signals and displaying data in correspondence with different display resolutions, comprising: first memory means (5) for storing a plurality of parameters for generating the different display timing signals in correspondence with a plurality of display resolutions; second memory means (14) for storing the display timing signal generating parameter read out from said first memory means; display resolution designating means (23) for designating the display resolution; setting means (1), responsive to said display resolution designating means for designating the display resolution, for reading out the display timing signal generating parameter from said first memory means in correspondence with the designated display resolution and for setting the readout parameter in said second memory means; and inhibition means (19, 17, 15) for inhibiting said setting means from setting the display timing signal generating parameter in said second memory means.
Claim 3
Dependent Claim
81 words
A system according to claim 1, characterized in that, when the display resolution designated by said display resolution designating means is different from a display resolution stored in said second memory means and is altered for the first time, said inhibition means permits, after an application program has been executed, said setting means to set the display timing signal generating parameter read out from said first memory means in said second memory means, and inhibits any alteration of the parameter thereafter.
Claim 4
Dependent Claim
30 words
A system according to claim 2, characterized in that said inhibition means permits the display timing signal generating parameter to be altered once in the execution of one application program.
Claim 5
Dependent Claim
24 words
A system according to claim 3, characterized in that the application program is a program which has been progammed for a CRT display apparatus.
Claim 6
Dependent Claim
74 words
A system according to claim 1, characterized by further comprising means for, when said display resolution designating means designates a different display resolution and the number of dots of the designated display resolution is smaller than that of a dot matrix of a physical screen constituting said plasma display apparatus, generating a display timing signal to be supplied to said plasma display apparatus, so that an effective display screen is located at the center.
Claim 7
Dependent Claim
113 words
A system according to claim 5, characterized in that, when said display resolution designating means designates a display resolution which differs from that stored in said second memory means, and when the number of dots of the designated display resolution in a vertical direction is smaller than that of the dot matrix of the physical screen constituting said plasma display apparatus, said means for generating the display timing signal calculates a difference therebetween, and generates the display timing signal so that the non-display areas having dots which number 1/2 the calculated difference in the vertical direction are formed on the upper and lower portions of the physical screen of said plasma display apparatus.
Claim 8
Dependent Claim
113 words
A system according to claim 5, characterized in that, when said display resolution designating means designates a display resolution which differs from that stored in said second memory means, and when the number of dots of the designated display resolution in a horizontal direction is smaller than that of the dot matrix of the physical screen constituting said plasma display apparatus, said means for generating the display timing signal calculates a difference therebetween, and generates the display timing signal so that the non-display areas having dots which number 1/2 the calculated difference in the horizontal direction are formed on the right and left portions of the physical screen of said plasma display apparatus.
Claim 9
Dependent Claim
124 words
A system according to claim 5, characterized in that, when said display resolution designating means designates a display resolution which differs from that stored in said second memory means, and when the numbers of dots of the designated display resolution in vertical and horizontal directions are smaller than those of the dot matrix of the physical screen constituting said plasma display apparatus, said means for generating the display timing signal calculates differences in the vertical and horizontal directions, and generates the display timing signal so that the non-display areas having dots which number 1/2 the calculated differences in the vertical and horizontal directions, respectively, are formed on upper and lower, and right and left portions of the physical screen of said plasma display apparatus.
Claim 10
Dependent Claim
55 words
A system according to claim 5, 6, or 7, characterized by further comprising boundary display means for, when the effective display screen is located at a predetermined position of the physical screen, displaying a nondisplay area of the physical screen with a luminance level lower than that of a no-display state of a display area.
Claim 11
Dependent Claim
19 words
A system according to claim 9, characterized in that the predetermined position is the center of the physical screen.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
Maintenance schedule is calculated for granted US utility patents.