Optical sensor circuit, luminous panel and method for operating an optical sensor circuit
US9480122B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 13, 2014 |
| Grant date | Oct 25, 2016 |
| Priority date | — |
| Expiry date | Nov 6, 2034 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH05B45/22
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
An optical sensor circuit comprises an optical sensor (DET) designed to provide a sensor signal indicative of light incident on the optical sensor (DET). A clock terminal (CLK) is used to receive a clocked control signal comprising high and low states. A controller unit (CU) is connected to the optical sensor (DET) and to the clock terminal (CLK). The controller unit (CU) is designed to process the sensor signal as a color signal (CTS) in a first mode if the clocked control signal is in high state, and process the sensor signal as an ambient light signal (ALS) in a second mode if the clocked control signal is in low state, and further designed to generate a driving signal (PWM) to drive a light emitting device (LED) to be connected at a control terminal (OUT). The driving signal (PWM) depends on the color and ambient light signal (CTS, ALS).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.