Voltage generation circuit having over-current protection function and display device having the same
US10607562B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 26, 2018 |
| Grant date | Mar 31, 2020 |
| Priority date | — |
| Expiry date | Mar 17, 2038 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03K21/08
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A voltage generation circuit of a display device includes an over-current detection circuit that provides a driving voltage to a voltage terminal and outputs an over-current detection signal. The over-current detection circuit includes a current detector that outputs a detection signal at a first level when a voltage corresponding to an output current flowing through the voltage terminal during a blank period, in which a blank signal is activated, is lower than a first reference level or higher than a second reference level, a glitch remover that outputs a noise detection signal when a time period in which the detection signal is maintained at the first level is longer than a reference maintenance time, and a noise filter that activates the over-current detection signal when the noise detection signal is activated at least twice during a predetermined time period.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.