Driving power unit for driving liquid crystal display element and liquid crystal light-modulating device
US5712692A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jun 29, 1995 |
| Grant date | Jan 27, 1998 |
| Priority date | — |
| Expiry date | Jun 29, 2015 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02F1/1334
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A driving power unit for a liquid crystal display element, which charges an electrostatic charge on the surface of the liquid crystal display element having at least a conductive layer and a liquid crystal-dispersed polymer layer in which a liquid crystal is finely dispersed into a polymer matrix, has a blocking oscillator circuit for boosting a low voltage generated by a low-voltage DC power source, a rectifier diode for rectifying the voltage boosted by the blocking oscillator circuit, a smoothing capacitor for being charged by application of the rectified voltage and smoothing an output voltage, and a resistance interconnected between the smoothing capacitor and an output terminal to control an output current value to 5 mA or less. A liquid crystal light-modulating device has a driving power unit and a liquid crystal light-modulating panel including a pair of electrodes at least one of which is transparent or translucent, and a liquid crystal-dispersed polymer layer sandwiched between the electrodes.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.