SOLID-STATE LIGHT SOURCE WITH COLOR FEEDBACK AND COMBINED COMMUNICATION MEANS

• US 20090321666A1
• Filed: 09/18/2007
• Published: 12/31/2009
• Est. Priority Date: 09/28/2006
• Status: Active Grant

• Current Assignee: Signify Holding B.V. (Signify N.V.)
• Original Assignee: Koninklijke Philips Electronics N.V. (Koninklijke Philips N.V.)
• Inventors: Hilgers, Achim
• Granted Patent: US 8,729,454 B2
• Time in Patent Office: Days
• US Class Current: 250/552
• CPC Class Codes: H01L 27/1443 with at least one potential jump or surface barrier
• CPC Class Codes: H01L 31/02162 for filtering or shielding light, e.g. multicolour filters for photodetectors
• CPC Class Codes: H05B 47/195 the transmission using visible or infrared light

Abstract

The present invention relates to a light sensor device comprising a substrate (18), a first light sensitive area (14, 15), and a second light sensitive area (12, 13). It is characterized in that a first optical filter device (22) assigned to said first area (14) and adapted to filter the visible light spectrum and a second optical filter device (24) assigned to said second area (12) and adapted to filter the non-visible light spectrum, preferably IR light spectrum, are provided, and said first and second light sensitive areas (12, 14) are fabricated on the same substrate (18) adjacent to each other to form a single integrated sensor component (10). The invention also relates to a lamp device (60) comprising such a light sensor device.

Claims

1. Light sensor device comprising

a substrate,

a first light sensitive area,

a second light sensitive area,

a first optical filter device assigned to said first area and adapted to filter the visible light spectrum,

a second optical filter device assigned to said second area and adapted to filter the non-visible light spectrum, and

an infrared light emitting diode disposed on the substrate for transmitting information and/or control signals via infrared light, wherein said first and second light sensitive areas are fabricated on the same substrate adjacent to each other to form a single integrated sensor component.

2. Light sensor device of claim 1, wherein said first and second light sensitive areas are provided within at least one window, and said first and second filter devices are arranged above said window.

3. Light sensor device of claim 1, wherein both light sensitive areas are sensitive to visible light and infrared light and said non-visible light spectrum is an infrared light spectrum.

4. Light sensor device of claim 1, wherein at least one of said light sensitive areas is provided as at least one PIN diode.

5. Light sensor device of claim 1, wherein said first area comprises three sensitive regions, each region is assigned an optical filter device for separating the visible light spectrum in three sub-spectra.

6. Light sensor device of claim 5, wherein said optical filter devices are adapted to filter red, green and blue light.

7. Light sensor device of claim 1, wherein at least one of said sensitive areas is coupled with at least one amplifier stage for amplifying the output of said sensitive area.

8. Light sensor device of claim 7, wherein an output of at least one of said amplifier stages is coupled to filter means.

9. Light sensor device of claim 1, wherein an infrared light emitting diode is driven by a controller circuit for transmitting said information and/or control signals.

10. Lamp comprising:

at least one LED light source for radiating visible light,

a control circuit for controlling the color of the light source, and

a light sensor device coupled to said control circuit for supplying information about the color of the radiated light and comprising;

a substrate,

a first light sensitive area,

a second light sensitive area,

a first optical filter device assigned to said first area and adapted to filter the visible light spectrum,

a second optical filter device assigned to said second area and adapted to filter the non-visible light spectrum, and

an infrared light emitting diode disposed on the substrate for transmitting information and/or control signals via infrared light, wherein said first and second light sensitive areas are fabricated on the same substrate adjacent to each other to form a single integrated sensor component.

11. Lamp of claim 10, characterized by a remote control having an infrared light emitting diode for transmitting control signals.

12-13. -13. (canceled)