Display apparatus and driving device for displaying
US6781605B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 5, 2002 |
| Grant date | Aug 24, 2004 |
| Priority date | — |
| Expiry date | Feb 20, 2023 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG09G2360/18
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A reference voltage generating circuit which generates reference voltages at a plurality of levels, a voltage follower circuit for stabilizing the reference voltages at a plurality of levels and a gray scale voltage generating circuit which generates gray scale voltages at a plurality of levels from the stabilized reference voltages are provided. The voltage follower circuit includes a differential amplifier which receives at one input the reference voltages, first and second buffer circuits connected in parallel to each other, and a resistor. Outputs of the first and second buffer circuits are connected to each other through the resistor, with the output of the first buffer circuit being fed back to the other input of the differential amplifier and the output of the second buffer circuit being connected to serve as an output of the voltage follower circuit.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.