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EP0095618A2 Expired / Lapsed EP ⏱️ 0.0 years remaining

Memory system

Assignee: Toshiba Corp
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Filing: 1983-05-11
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Granted: —
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Expires: 2003-05-11
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Abstract

Abstract A memory system is used in a display or printing system for displaying or printing a picture pattern by processing picture data obtained by a function generator (12). The memory system comprises memory planes (26, 27, 28) for storing picture data, registers (16R, 16G, 16B) provided in one-to-one relationship with the memory planes (26, 27, 28) for latching the picture data read from the memory planes (26, 27, 28), and arithmetic logic units (17R, 17G, 17B) provided in one-to-one relationship with the memory planes (26, 27, 28) for performing logical operations on the picture data latched in the registers (16R, 16G, 16B) on one hand and the picture data obtained by the function generator (12) on the other. The memory system further comprises an operation mode register (18) storing operation mode data. The arithmetic logic units (17R, 17G, 17B) perform logical operations according to the operation mode data supplied from the operation mode register (18). The results of the operations are simultaneously written into the respective memory planes (26, 27, 28).

Inventors

  • 👤 Shouji Ounuma

Bibliographic Details

Application Number —
Jurisdiction EP
Data Source google_patents
Last Synchronized 2026-10-29 01:04
CPC Classifications
G; G09; G09G; G09G5/00; G09G5/36; G09G5/39; G09G5/393; G09G5/02; G09G5/022

Claims Analysis

Total Claims: 10
Claim 1
Independent Claim 62 words
A memory system comprising: a plurality of memory planes (26, 27, 28) for storing picture data; memory control means (14) for controlling writing and reading data from the memory planes; and a plurality of operation means (17R, 17G, 17B) provided in one-to-one relationship with the memory planes (26, 27, 28) for performing logical operations on data read from the respective memory planes.
Claim 2
Dependent Claim 62 words
A memory system comprising: a plurality of memory planes (26, 27, 28) for storing picture data; memory control means (14) for controlling writing and reading data from the memory planes; and a plurality of operation means (17R, 17G, 17B) provided in one-to-one relationship with the memory planes (26, 27, 28) for performing logical operations on data read from the respective memory planes.
Claim 3
Dependent Claim 44 words
A memory system according to claim 1, characterized by further comprising a plurality of first lacthing means (16R, 16G, 16B) provided in one-to-one relationship with said operation means (17R, 17G, 17B) for holding the data from said plurality of memory planes (26, 27, 28).
Claim 4
Dependent Claim 31 words
A memory system according to claim 2, characterized in that further comprising a second latch means (18) storing data representing the modes of operation of said operation means (17R, 17G, 17B).
Claim 5
Dependent Claim 32 words
A memory system according to claim 1, characterized in that wherein said memory planes (26, 27, 28) are assigned to picture patterns of the three primary colors, red, green and blue, respectively.
Claim 6
Dependent Claim 28 words
A memory system according to claim 3, characterized in that one of said operation modes is to draw a new picture pattern represented by newly input picture data.
Claim 7
Dependent Claim 47 words
A memory system according to claim 3, characterized in that one of said operation modes is to obtain a logical sum of the picture data stored in any memory plane (26, 27, 28) and newly input picture data and representing a new picture pattern to be drawn.
Claim 8
Dependent Claim 47 words
A memory system according to claim 3, characterized in that one of said operation modes is to obtain a logical product of the picture data stored in any memory plane (26, 27, 28) and picture data newly input and representing a new picture pattern to be drawn.
Claim 9
Dependent Claim 48 words
A memory system according to claim 3, characterized in that one of said operation modes is to obtain an exclusive logical sum of the picture data stored in ane memory plane (26, 27, 28) and picture data newly input and representing a new picture pattern to be drawn.
Claim 10
Dependent Claim 71 words
A memory system according to claim 3, characterized in that one of said operation modes renders those of the picture data stored in any memory plane (26, 27, 28) which correspond to the logically significant data of a new picture pattern logically significant and keeps those of the picture data stored in the memory plane (26, 27, 28) which correspond to the logically insignificant data of the new picture pattern unmodified.

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