Brightness control and power control of display device
US5956014A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Oct 18, 1995 |
| Grant date | Sep 21, 1999 |
| Priority date | — |
| Expiry date | Oct 18, 2015 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG09G2330/045
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
In a plasma display panel, an analogue brightness value given by a variable resistor is periodically converted into a digital brightness value and stored in a memory. A digital brightness value of a current period is compared with the digital brightness value of the next preceding period stored in the memory, to produce a difference brightness value which is compared with a predetermined brightness value and, if larger than the predetermined value, the brightness value stored in the memory is updated. Alternatively, power consumption of a display device is detected and, when the power consumption is larger than a set point, a brightness value is gradually decreased and, when the power consumption is smaller than the set point, the brightness value is gradually adjusted to a brightness set value.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.