Patent EP0085480A2 successfully refreshed from Google Patents.
EP0085480A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Improvements in or relating to video display systems
Assignee: EUROPEL SYSTEMS (ELECTRONICS) Ltd
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Filing: 1983-01-10
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Granted: —
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Expires: 2003-01-10
Abstract
Abstract A video display system suitable for use in video games includes a store for storing information to be displayed, a video controller for selecting from the store a plurality of dots on a raster scan display on which the information is obtained from the store is passed to a parallel to serial converter to provide data on each dot sequentially to the raster scan display.
Inventors
- 👤 Christopher Richard Cox
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-27 12:09
CPC Classifications
G; G09; G09G; G09G5/00; G09G5/02; G09G5/06; G09G5/36; G09G5/39
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
78 words
A video display system including storage means for storing data to be displayed, a raster scan display for display of the data, a video controller for selection in a single clock pulse period, the addresses in said storage means of a plurality of dots to be displayed on said raster scan display at positions determined by said video controller, and including a parallel to serial converter to provide data on each dot sequentially to the raster scan display.
Claim 2
Dependent Claim
78 words
A video display system including storage means for storing data to be displayed, a raster scan display for display of the data, a video controller for selection in a single clock pulse period, the addresses in said storage means of a plurality of dots to be displayed on said raster scan display at positions determined by said video controller, and including a parallel to serial converter to provide data on each dot sequentially to the raster scan display.
Claim 3
Dependent Claim
42 words
A video display system as claimed in Claim 1 including a fast colour look-up memory addressed by the information from the plurality of dot addresses to provide colour information for the plurality of dots to be displayed on the raster scan display.
Claim 4
Dependent Claim
71 words
A video display system as claimed in Claim 1 in which the video controller is controlled by a clock generating means which provides a clock pulse cycle in two portions, in which information from the plurality of dot addresses is transferred during the first portion of each clock pulse cycle and in which during the other portion of the clock cycle the storage means may receive data to update the display.
Claim 5
Dependent Claim
40 words
.4.. A video display system as claimed in Claim 3 including a further storage means for the storage of video information and including control means for controlling the transfer of information from said further storage means to said storage means.
Claim 6
Dependent Claim
17 words
A video display system as claimed in Claim 4 in which said control means is a microprocessor.
Claim 7
Dependent Claim
35 words
A video display system as claimed in Claim 5 in which said microprocessor is connected to a data bus and an address bus for the receptive passage of video data and instructions throughout the system.
Claim 8
Dependent Claim
54 words
A video display system as claimed in Claim 6 including an incrypton device connected between said micro processor and said video data bus such that the information on said data bus is a combination of the instructions from the microprocessor and the incrypton such that without the correct incrypton the system will not operate.
Claim 9
Dependent Claim
41 words
A video display system as claimed in Claim 2 in which the fast colour look up memory includes additional colour information relating to selected areas of the raster scan display to change the colour in those areas relative to other areas.
Claim 10
Dependent Claim
22 words
A video display system as claimed in Claim 1 in which the plurality of dots to be displayed is four or eight.
Claim 11
Dependent Claim
44 words
A video display system as claimed in Claim 2 in which the fast colour look up memory connect digital video data into analogue quantities for the raster L. c an display in which they can provide an output approximately equal to the required colour.
Claim 12
Independent Claim
113 words
A method of displaying video data on a raster scan display including storing the video data in a digital form in a random access memory, transferring the digital video data from said random access memory to a video memory, in which a display is stored as a series of colour numbers corresponding to dots on the raster scan display, under the control of a programme sequence stored in said random access memory, such that the video colour data stored in said video memory is accessible under the control of a video controller to be output to a parallel to serial converter to provide data on each dot sequentially to the raster scan display.
Claim 13
Independent Claim
113 words
A method of displaying video data on a raster scan display including storing the video data in a digital form in a random access memory, transferring the digital video data from said random access memory to a video memory, in which a display is stored as a series of colour numbers corresponding to dots on the raster scan display, under the control of a programme sequence stored in said random access memory, such that the video colour data stored in said video memory is accessible under the control of a video controller to be output to a parallel to serial converter to provide data on each dot sequentially to the raster scan display.
Claim 14
Dependent Claim
38 words
A method of displaying video data as claimed in Claim 11 including a plurality of colour look-up random access memories which control digital to analogue circuits for the display of the video data on the raster scan display.
Claim 15
Dependent Claim
32 words
A method of displaying video data as claimed in Claim 12 in which the colour look up random access memories are addressable to change the colours displayed on the cathode ray tube.
Claim 16
Dependent Claim
33 words
A method of displaying video data as claimed in Claim 11 in which the video data transferred from the random access memory to the video memory is modified to change the displayed information.
References Cited (Backward Citations)
No citation records indexed.
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