Miniaturized electronic apparatus
US4806923A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Mar 20, 1986 |
| Grant date | Feb 21, 1989 |
| Priority date | — |
| Expiry date | Mar 20, 2006 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F1/26
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An electronic apparatus has a solar battery and a liquid crystal display unit for displaying a plurality of digits. A plurality of column electrodes are provided for each digit, and a plurality of common electrodes are provided for all the digits. A regulator receives and stabilizes the output voltage of the solar battery. A pulse generator generates a clock pulse signal. It is an oscillator with CMOS structure to permit implementation as a LSI. A CPU is driven by the stabilized voltage and the clock pulse signal to provide data to be displayed on the display unit. A liquid crystal driver circuit applies common signals, which can assume two different voltage levels and have a waveform with the logic level thereof inverted for every one held cycle period, to the common electrodes. The driver circuit applied column signals of either one of the two voltage levels corresponding to the display data to the column electrodes. Voltages corresponding to differences between the segment signals and common signals are applied across the liquid crystal of the display unit, whereby the display unit is driven by a multi-static system. The regulator, CPU and liquid crystal driver circuit are assem…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.