Digital-to-analog converter, data driver, and display device
US12406638B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Apr 23, 2024 |
| Grant date | Sep 2, 2025 |
| Priority date | — |
| Expiry date | Apr 23, 2044 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03M1/0682
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
The differential amplifier circuit includes: first conductivity type first to Nth differential stages each causing a current corresponding to the first or second voltage received at the non-inverting input terminal to flow to a first node and a current corresponding to the output voltage signal received at the inverting input terminal to a second node; a second conductivity type differential stage receiving one of the first and second voltages at the non-inverting input terminal and receiving the output voltage signal at the inverting input terminal, and being activated when the digital data value is within a predetermined range to cause a current corresponding to the one voltage to flow to a third node and a current corresponding to the output voltage signal to a fourth node; and an output amplification stage generating the output voltage signal based on the currents respectively flowing to the first to fourth nodes.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.