Power supply device and display device including the same
US10665190B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 16, 2017 |
| Grant date | May 26, 2020 |
| Priority date | — |
| Expiry date | Sep 15, 2037 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG09G2330/12
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A power supply device includes a power circuit, feedback circuit, compensation circuit, and PWM controller. The power circuit generates an output voltage based on a PWM signal. The feedback circuit outputs a feedback voltage. The compensation circuit compares a reference voltage with the feedback voltage and outputs a compensation signal based on a comparison result. The PWM controller adjusts the duty ratio of the PWM signal based on the compensation signal. The compensation circuit includes a comparator to compare the feedback voltage with the reference voltage, a first voltage adjuster to adjust a voltage level of a compensation voltage based on the comparison result, and a compensator output the compensation signal based on the voltage level of the compensation voltage. The compensation signal has a width in a high section that varies. The booster boosts the response speed of the compensator in a predetermined section based on a control signal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.