Display device comprising a plurality of display units and a control circuit
US5977937A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Aug 14, 1995 |
| Grant date | Nov 2, 1999 |
| Priority date | — |
| Expiry date | Aug 14, 2015 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F3/147
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A display device has a plurality of display units (D.sub.1, D.sub.2 . . . D.sub.n), each display unit consisting of a number of multiplex-operated display sections, each of which has a plurality of display elements which can be simultaneously but independently switched and each of which has a respective display driver (for example, T.sub.1), and a circuit arrangement for controlling the display device. The circuit arrangement includes a memory (M) in which the information to be output via the display device is stored, a microcontroller (MC) which has at least one synchronous serial interface (2) and a DMA controller (3) for transferring data intended for each time the same display section of the display units (D.sub.1, D.sub.2 . . . D.sub.n) from the memory to the interface, a shift register arrangement (S.sub.1, S.sub.2 . . . S.sub.n) which is connected to the serial interface (2) and which has a parallel output, and storage members (L.sub.1, L.sub.2 . . . L.sub.n) which are connected to the parallel output of the shift register arrangement for periodically taking up the contents of the shift register arrangement and for controlling the display drivers (T.sub.1, T.sub.2 . . . T.su…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.