EP0196733A2
Expired / Lapsed
EP
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Method for displaying picture image data
Assignee: Dainippon Screen Manufacturing Co Ltd
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Filing: 1986-01-06
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Granted: —
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Expires: 2006-01-06
Abstract
Abstract A method for displaying a picture image in which pixel data are divide into groups every 2 m of the data which are aligned sequentially, the pixel data of each of the divided groups are written into the same numbered addresses of memory elements of 2 m , and read out the 2 m pixel data in parallel, then the data are converted into parallel to series (vice versa) so that order of the data may be restored to the original order thereof. When the pixel data are written in the memory elements, every at least two consecutive addresses sequence of the consecutive 2m pixel data are changed according to accessed addresses and at least every two groups the identical specific numbered pixel data in the groups are controlled so that they may be written in different numbered memory elements with each other. In the case of reading out pixel data from the memory elements, data of 2 m read out of the memory elements of 2m by any consecutive addresses are rearranged according to the writing control in the case of normal display, and in 1/2" reduction display both vertical and horizontal addresses are multiplied by 2" according to 1/2" reduction, and the 2 m memory elements are read out basing on different 2" addresses obtained according to writing control.
Inventors
- 👤 Hiroshi Kurusu
- 👤 Tokuzo Fujii
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-04 09:39
CPC Classifications
G; G09; G09G; G09G5/00; G09G5/36; G09G5/39; G09G5/391
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
260 words
A method for displaying a picture image in which pixel data being aligned in order are divided into every 2 m groups, said pixel data of each of the groups are written in the same numbered addresses of the 2 m memory elements and read out the 2 m pixel data in parallel from said 2 m memory elements, and performs parallel-series conversion to display the picture image on a picture plane of a monitor, characterized in that: when the pixel data are written in said memory elements, at least every two consecutive addresses in said memory elements of 2 m said memory elements are accessed, and an order of said consecutive 2 m pixel data are varied according to said accessed addresses, identical specific numbered pixel data at least in two consecutive groups are controlled at least every two groups of so that they may be written in different numbered memory elements with each other, in the case of reading out pixel data from memory elements, data of 2 m read out of said memory elements of 2 m by consecutive addresses are rearranged according to said writing control in the case of normal display, in the case of 1/2 n reduction display both vertical and horizontal addresses are multiplied by 2 n according to 1/2 n reduction, and said 2 m memory elements are read out basing on different 2 n addresses obtained according to the writing control, basing on said writing and reading control, either of normal picture images or reduction picture images can be displayed freely.
Claim 2
Independent Claim
260 words
A method for displaying a picture image in which pixel data being aligned in order are divided into every 2 m groups, said pixel data of each of the groups are written in the same numbered addresses of the 2 m memory elements and read out the 2 m pixel data in parallel from said 2 m memory elements, and performs parallel-series conversion to display the picture image on a picture plane of a monitor, characterized in that: when the pixel data are written in said memory elements, at least every two consecutive addresses in said memory elements of 2 m said memory elements are accessed, and an order of said consecutive 2 m pixel data are varied according to said accessed addresses, identical specific numbered pixel data at least in two consecutive groups are controlled at least every two groups of so that they may be written in different numbered memory elements with each other, in the case of reading out pixel data from memory elements, data of 2 m read out of said memory elements of 2 m by consecutive addresses are rearranged according to said writing control in the case of normal display, in the case of 1/2 n reduction display both vertical and horizontal addresses are multiplied by 2 n according to 1/2 n reduction, and said 2 m memory elements are read out basing on different 2 n addresses obtained according to the writing control, basing on said writing and reading control, either of normal picture images or reduction picture images can be displayed freely.
Claim 3
Dependent Claim
80 words
A method for displaying a picture image according to claim 1, wherein when the pixel data are written in the memory elements, even the numbered groups of every 2 m consecutive sequential pixel data are written in 2 m memory elements according to the order of the pixel data, and the odd numbered groups of the 2 m pixel data are written in the 2 m memory elements by substituting the even numbered pixel data for the odd ones, respectively.
Claim 4
Dependent Claim
118 words
A method for displaying a picture image according to claim 2, wherein when the normal display is performed by reading out the pixel data from the memory elements, data are read out from the 2 m memory elements, if the LSB address which accesses the memory element is an even number, a normal picture display is produced by controlling the monitor according to the order of the sequence of the memory elements, and in the case of the LSB address which accesses the the memory element is an odd number, the normal picture display is produced by controlling the monitor according to an order of having been replaced the even numbered memory element with the odd numbered ones.
Claim 5
Dependent Claim
120 words
A method for displaying a picture image according to claim 2, wherein in the case of 1/2 reduction display by reading the pixel data from the memory elements, both the vertical and horizontal addresses are doubled, an even numbered address is added to each of even numbered memory elements independently and to each of odd numbered memory elements an odd address is added independently, by reading out 2 m data every pair of consecutive even and odd numbered addresses, the read out data from the even numbered memory in order with the number of the memory elements and the read out data from the odd numbered memory elements in order with the memory elements are sequentially displayed on the monitor.
Claim 6
Dependent Claim
64 words
A method for displaying a picture image according to claim 1, wherein when the pixel data are written in the memory elements, an order of the consecutive pixel data of every 2 m are circulatingly shifted according to a value corresponding to a memory element access address to store the shifted pixel data according to the sequence of memory element in the memory element.
Claim 7
Dependent Claim
58 words
A method for displaying a picture image according to claim 5, wherein when the pixel data are read out of the memory means for the normal display, by rearranging the read picture image data of 2 m in response to a value of the LSB of access address, the normal picture display is carried out by the monitor.
Claim 8
Dependent Claim
113 words
A method for displaying a picture image according to claim 5, wherein when 1/2 n reduction picture is displayed by reading out the pixel data from the memory element, the vertical and the horizontal addresses are multiplied by 2 n , divided into 2 n groups basing on order of the address number, the LSB addresses are given to the memory elements and further 0, 1,...2 n-1 are independently given to the memory elements, 2 m data are read out of the memory elements, according to a value of each of the LSB 2 m of the respective access address the data are rearranged to display 1/2 n reduction display by the monitor.
References Cited (Backward Citations)
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