JPH0248998U

JPH0248998U -

Info

Publication number: JPH0248998U
Application number: JP12712788U
Authority: JP
Priority date: 1988-09-30
Filing date: 1988-09-30
Publication date: 1990-04-05

Description

[Brief explanation of drawings]

第１図は本考案の一実施例の要部を示すブロツ
ク図、第２図は本考案の一実施例を含むシステム
のブロツク図、第３図は本考案の一実施例の動作
を説明するためのフローチヤート、第４図は従来
の画像表示装置の要部ブロツク図である。３…表示器、４…デイスプレイコントローラ、
５…制御回路、７…メモリ、５１…ＣＰＵ、５２
…グラフイツクパターンテーブル、７１…バツフ
アメモリ、７２…フラグテーブル、４０２，４０
３…画データメモリ、４０４…論理和回路、４０
５…キヤラクタジエネレータ。 Fig. 1 is a block diagram showing the main parts of an embodiment of the invention, Fig. 2 is a block diagram of a system including an embodiment of the invention, and Fig. 3 explains the operation of an embodiment of the invention. FIG. 4 is a block diagram of the main parts of a conventional image display device. 3...Display unit, 4...Display controller,
5...Control circuit, 7...Memory, 51...CPU, 52
...Graphic pattern table, 71...Buffer memory, 72...Flag table, 402, 40
3... Image data memory, 404... OR circuit, 40
5...Character generator.

Claims

[Claims for Utility Model Registration] A first image data memory in which image data for a character display is stored in an image data area corresponding to a display area obtained by dividing a display screen into a plurality of parts;
a second image data memory in which image data for a graphic display is stored in an image data area corresponding to a display area obtained by dividing the display screen into a plurality of areas, and a correspondence between the first and second image data memories; In an image display device that performs display based on a logical sum of image data in an image data area, the display type storage means stores image type data that is displayed in association with each image data area; When storing data, it is detected whether the type is the same as the displayed image by referring to the display type storage means, and if it is the same type, it is stored in the corresponding image data memory, while if it is of a different type. In this case, the corresponding image data area of the image data memory on the side where image data is not stored is cleared and the image data is stored in the corresponding image data memory, and the corresponding type data in the display type storage means is changed. An image display device comprising display control means for performing the following steps.