EP0421772A2
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EP
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Display apparatus
Assignee: Canon Inc
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Filing: 1990-10-04
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Granted: —
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Expires: 2010-10-04
Abstract
Abstract There is provided a display apparatus which uses a display panel using a liquid crystal having a bistability or a memory performance such as a ferroelectric liquid crystal and can display image data in various display modes in which the number of pixels (resolution), display color, minimum pixel unit, and the like respectively differ. The display apparatus comprises: a memory to store the image data; a pixel data output circuit to output the image data stored in the memory every pixel data; a converter to convert the pixel data which was output from the pixel data output circuit into binary data which is displayed on the display panel; a display data output circuit for converting the binary data converted by the converter into the display data corresponding to the display modc and outputting; and a display controller for allowing the image data which was output by the display data output circuit to be displayed on the display panel. A multiplexer is used as a pixel data output circuit. An RAM in which binary data has been stored is used as a converter.
Inventors
- 👤 Atsushi Mizutome
- 👤 Hiroshi Inoue
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-09 10:45
CPC Classifications
G; G09; G09G; G09G3/00; G09G3/20; G09G3/34; G09G3/36; G09G3/3611; G09G3/3622; G09G3/3629; G09G3/364; G09G2310/00; G09G2310/02; G09G2310/0232; G09G2340/00; G09G2340/04; G09G2340/0407; G09G2340/0464; G09G2360/00; G09G2360/02; G09G3/2007; G09G3/2074
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
147 words
A display apparatus which uses a display panel using a liquid crystal having a memory performance and can display image data in a plurality of display modes in which the number of pixels, display color, minimum pixel unit, and the like respectively differ, comprising: memory means for storing the image data; pixel data output means for outputting the image data stored in the memory means pixel data by pixel data; converting means for converting the pixel data which was output by the pixel data output means into binary data which is displayed on the display panel; display data output means for converting the binary data which was converted by the converting means into display data corresponding to the display mode and outputting; and display control means for allowing the image data which was output by the display data output means to be displayed on the display panel.
Claim 2
Dependent Claim
147 words
A display apparatus which uses a display panel using a liquid crystal having a memory performance and can display image data in a plurality of display modes in which the number of pixels, display color, minimum pixel unit, and the like respectively differ, comprising: memory means for storing the image data; pixel data output means for outputting the image data stored in the memory means pixel data by pixel data; converting means for converting the pixel data which was output by the pixel data output means into binary data which is displayed on the display panel; display data output means for converting the binary data which was converted by the converting means into display data corresponding to the display mode and outputting; and display control means for allowing the image data which was output by the display data output means to be displayed on the display panel.
Claim 3
Dependent Claim
16 words
A display apparatus according to claim 1, wherein the pixel data output means is a multiplexer.
Claim 4
Dependent Claim
24 words
A display apparatus according to claim 1, wherein the converting means is an RAM (random access memory) in which binary data has been stored.
Claim 5
Dependent Claim
30 words
A display apparatus according to claim 1, wherein the converting means is constructed by a plurality of RAMs (random access memories) in each of which binary data has been stored.
Claim 6
Dependent Claim
38 words
A display apparatus according to claim 1, further having frame display means for displaying desired frame image data to an area out of an effective display area of the image data which was displayed on the display panel.
Claim 7
Dependent Claim
48 words
A display apparatus according to claim 5, wherein the frame display means outputs and displays the frame image data of the area out of the effective display area within horizontal and vertical blanking periods of time of the image data which is displayed in the effective display area.
Claim 8
Dependent Claim
16 words
A display apparatus according to claim 1, wherein the display data output means is a multiplexer.
Claim 9
Dependent Claim
20 words
A display apparatus according to claim 1, wherein the liquid crystal having the memory performance is a ferroelectric liquid crystal.
Claim 10
Dependent Claim
65 words
A display apparatus using a display panel using a liquid crystal having a memory performance, comprising: frame display means for displaying frame image data to an area out of an effective display area to display image data of the display panel, wherein the frame display means outputs and displays the frame image data within horizontal and vertical blanking periods of time of the image data.
Claim 11
Dependent Claim
65 words
A display apparatus using a display panel using a liquid crystal having a memory performance, comprising: frame display means for displaying frame image data to an area out of an effective display area to display image data of the display panel, wherein the frame display means outputs and displays the frame image data within horizontal and vertical blanking periods of time of the image data.
Claim 12
Dependent Claim
20 words
A display apparatus according to claim 9, wherein the liquid crystal having the memory performance is a ferroelectric liquid crystal.
Claim 13
Dependent Claim
42 words
A display apparatus according to claim 9, wherein the frame display means sets the frame image data of the area out of the effective display area within one horizontal scanning period or one vertical display period of time of the image data.
Claim 14
Dependent Claim
34 words
A display apparatus according to claim 9, wherein the frame display means further has memory means for storing the frame image data which is displayed to the area out of the effective display area.
Claim 15
Dependent Claim
39 words
A display controller for controlling a display having discrete display states, the display controller being operable in a plurality of display modes, including conversion means for converting stored image data into displayable image data responsive to the selected mode.
Claim 16
Dependent Claim
39 words
A display controller for controlling a display having discrete display states, the display controller being operable in a plurality of display modes, including conversion means for converting stored image data into displayable image data responsive to the selected mode.
Claim 17
Dependent Claim
48 words
An image output control circuit for displaying images in a selected one of a plurality of display modes on a discrete level display device, in which there are provided gradation conversion means for displaying a depthwise colour gradation appearance on the display, in dependence upon the selected format.
Claim 18
Dependent Claim
48 words
An image output control circuit for displaying images in a selected one of a plurality of display modes on a discrete level display device, in which there are provided gradation conversion means for displaying a depthwise colour gradation appearance on the display, in dependence upon the selected format.
References Cited (Backward Citations)
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