Global Patent Index - EP 0192958 A3

EP 0192958 A3 1990-05-23 - DISPLAY CONTROL DEVICE

Title (en)

DISPLAY CONTROL DEVICE

Publication

EP 0192958 A3 (DE)

Application

EP 86100786 A

Priority

DE 3503277 A

Abstract (en)

[origin: EP0192958A2] Known display units embody a control device having a picture memory (BSP1) with picture data stored in its cells, each of which is assigned to a picture element and is read out synchronously with the display of the picture elements on the display unit (SG). According to the present invention, to display a plurality of pictures which partly overlap, picture data are only entered in the picture memory (BSP1) for those picture elements which are to be visible. For this purpose, write-protection signals can be stored in the cells of the picture memory (BSP1). These protection signals are read out in the event of a writing command and prevent new picture data being written in. The main field of application of the invention is in display units. <IMAGE>

IPC 1-7 (main, further and additional classification)

G09G 1/16

IPC 8 full level (invention and additional information)

G09G 5/22 (2006.01); G09G 5/393 (2006.01)

CPC (invention and additional information)

G09G 5/222 (2013.01); G09G 5/393 (2013.01)

Citation (search report)

Designated contracting state (EPC)

AT CH DE FR GB IT LI NL SE

DOCDB simple family

EP 0192958 A2 19860903; EP 0192958 A3 19900523