Reverse images in a dot matrix LCD for an environmental control device
US7050026B1 · kind B1 · utility
113Cited by
4References
8Claims
0Family size
Inventor
Key dates
| Filing date | May 15, 2003 |
| Grant date | May 23, 2006 |
| Priority date | — |
| Expiry date | Feb 21, 2024 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG05D23/1902
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
The present invention is a method for operating a backlighted dot matrix type LCD for displayed outputs from a programmable environmental control device, such as a programmable thermostat. The LCD is operated so that viewer elements of a displayed data item are non-opaque when a room where the LCD is located is darkened and the surrounding display elements are partially or completely opaque. Selected elements can also change from opaque to non-opaque to display an active condition.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.