Control system for driving a capacitive display unit such as an EL display panel
US4070663A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jul 7, 1976 |
| Grant date | Jan 24, 1978 |
| Priority date | — |
| Expiry date | Jul 7, 1996 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG09G2330/024
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A coil is serially connected to a capacitive display unit, such as an EL display panel, which includes an insulating display element sandwiched between a pair of electrodes. The coil and the electrostatic capacitance of the display unit function, in combination, to form an LC resonance circuit, which limits transient current flowing through the insulating display element and enables the display unit to operate in a low power dissipation mode. An alternating driving signal to be applied to the display unit has an intermediate potential period on which a writing pulse is superimposed, thereby to minimize high voltage requirement of the writing circuit.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.