EP 0284905 B1 19931201 - Display system.
Title (en)
Display system.
Title (de)
Anzeigesystem.
Title (fr)
Système d'affichage.
Publication
Application
Priority
GB 8707851 A 19870402
Abstract (en)
[origin: EP0284905A2] The present invention relates to a display system comprising a display buffer 36 data indicative of picture elements with a facility for moving an image from a source to a destination position by manipulating the data in the display buffer. The present invention provides this facility by having means for reading, processing and storing bursts of display buffer words. In the described embodiment of the invention control logic 44 first causes a burst of display buffer words containing bytes representative of the image in its source position to be read out from the display buffer. These words are passed through a barrel shifter 66, where the word is rotated as necessary and stored in appropriate byte locations in a FIFO buffer 68. The FIFO buffer has the capability to write to two word addresses simultaneously so that data words are created in the FIFO buffer which contain data in the correct alignment for writing unmodified into the corresponding display buffer words. When the source has been completely read or the buffer is full (whichever comes first) the control logic automatically switches from reading to writing and stores the burst of data words it has in its FIFO buffer into memory at the destination locations.
IPC 1-7
IPC 8 full level
G06T 1/60 (2006.01); G09G 5/393 (2006.01)
CPC (source: EP)
G09G 5/393 (2013.01)
Designated contracting state (EPC)
DE FR GB IT
DOCDB simple family (publication)
EP 0284905 A2 19881005; EP 0284905 A3 19900919; EP 0284905 B1 19931201; CA 1294380 C 19920114; DE 3885926 D1 19940113; DE 3885926 T2 19940519; GB 2203317 A 19881012; GB 2203317 B 19910403; GB 8707851 D0 19870507; JP S63251864 A 19881019
DOCDB simple family (application)
EP 88104228 A 19880317; CA 563038 A 19880331; DE 3885926 T 19880317; GB 8707851 A 19870402; JP 4598888 A 19880301