Digital-to-analog conversion circuit and method, and display device
US11323127B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 18, 2019 |
| Grant date | May 3, 2022 |
| Priority date | — |
| Expiry date | May 28, 2040 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG09G2330/021
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A digital-to-analog conversion circuit, a digital-to-analog conversion method, and a display device are provided. The digital-to-analog conversion circuit includes a first digital-to-analog conversion sub-circuit and a second digital-to-analog conversion sub-circuit. The second digital-to-analog conversion sub-circuit includes least-significant-bit voltage selection modules whose quantity is a, a weighed summation operational amplifier, switching control modules whose quantity is a and energy storage modules whose quantity is a. The weighted summation operational amplifier includes a reverse-phase input end, an operational amplification output end, and same-phase input ends whose quantity is a. The reverse-phase input end is connected to the operational amplification output end, and a is an integer greater than 1. The weighted summation operational amplifier is configured to perform weighted summation on voltages inputted by the a same-phase input ends at a digital-to-analog conversion stage to acquire an analog voltage, and output the analog voltage via the operational amplification output end.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.