Current output type of semiconductor circuit, source driver for display drive, display device, and current output method
US7561147B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Apr 28, 2004 |
| Grant date | Jul 14, 2009 |
| Priority date | — |
| Expiry date | Apr 20, 2026 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG09G2340/0428
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
To provide a current output type semiconductor circuit, a drive device for display, a display device, and a current output method that can control an increase in a circuit size to be lower even if the number of output bits of a current driver is increased.A current output type semiconductor circuit, including first current source groups 241a and 241b, includes first unit transistors of outputting a predetermined current and output lower order N (N is a natural number) bits; and second current source groups 242a, 242b, 242c, 242d, 242e, and 242f that include second unit transistors of outputting a current larger than that of the first unit transistors and output higher order M (M is a natural number, (N+M)≧3) bits.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.