EP 0192958 A3 19900523 - DISPLAY CONTROL DEVICE
Title (en)
DISPLAY CONTROL DEVICE
Publication
Application
Priority
DE 3503277 A 19850131
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
IPC 8 full level
G09G 5/22 (2006.01); G09G 5/393 (2006.01)
CPC (source: EP)
G09G 5/222 (2013.01); G09G 5/393 (2013.01)
Citation (search report)
- [X] US 4070662 A 19780124 - NARVESON PARM L
- [Y] US 4317114 A 19820223 - WALKER JAMES T
- [A] EP 0008324 A1 19800305 - CHRYSLER CORP [US]
- [A] WO 8001422 A1 19800710 - ERICSSON TELEFON AB L M [SE]
- [A] EP 0106601 A2 19840425 - FANUC LTD [JP]
Designated contracting state (EPC)
AT CH DE FR GB IT LI NL SE
DOCDB simple family (publication)
DOCDB simple family (application)
EP 86100786 A 19860122