Communications: electrical – Land vehicle alarms or indicators – Internal alarm or indicator responsive to a condition of the...
Patent
1981-09-11
1984-04-24
Curtis, Marshall M.
Communications: electrical
Land vehicle alarms or indicators
Internal alarm or indicator responsive to a condition of the...
340728, 340750, 340721, G09G 116
Patent
active
044451156
ABSTRACT:
A display member, for example a visual display unit presents symbols which are divided into modules. Each module consists of a dot matrix. A refresh memory has one word for each module on the visual display unit. Out of the words in the refresh memory, which correspond to the modules of a symbol, one word contains a symbol code and the other words define the dot matrices of the modules. Control information in each word indicates if the word is a symbol code or a dot matrix. A code transformation memory is supplied with the symbol code and has a word at an address indicated by the symbol code, which word defines the dot matrix of the module in question. A selector forwards to the display member, in dependence on the control information, the word read from the refresh memory if the control information indicates that the word defines a dot matrix, and forwards the word read out from the code transformation memory if the control information indicates that the word read out from the refresh memory is a symbol code.
REFERENCES:
patent: 3967268 (1976-06-01), Roberts
patent: 4242678 (1980-12-01), Somerville
ASEA Aktiebolag
Curtis Marshall M.
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