Solid-state light source with color feedback and combined communication means

• US 8,729,454 B2
• Filed: 09/18/2007
• Issued: 05/20/2014
• Est. Priority Date: 09/28/2006
• Status: Active Grant

• Current Assignee: Signify Holding B.V. (Signify N.V.)
• Original Assignee: Koninklijke Philips N.V.
• Inventors: Hilgers, Achim
• Primary Examiner(s): Le, Que T
• Assistant Examiner(s): BENNETT, JENNIFER D
• Application Number:
  US12/439,798
• Publication Number:
  US 20090321666A1
• Time in Patent Office: 2,436 Days
• Field of Search: 250/214.R, 250/214.1, 250/221, 250/214.VT, 250/226, 250/206, 250/216, 250/552, 250/214.AL, 250/214.A, 250/551, 250/205, 250/239, 250/338.1, 250/338.4, 250/339.02, 250/339.05, 250/339.06, 250/393, 340/600, 340/540, 315/155, 315/151, 315/169.3, 315/152, 362/276, 362/362, 362/800, 313/524, 313/110, 313/111, 313/498, 313/500
• US Class Current: 250/226
• 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. A 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 and said infrared light emitting diode are fabricated on the same substrate adjacent to each other to form a single integrated sensor component;

wherein said first and second light sensitive areas are provided within a single window recessed in the substrate and said first and second filter devices are arranged above said window, and immediately adjacent to each other, to optically seal the recessed window.

2. The 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.

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

4. The 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.

5. The light sensor device of claim 4, wherein said optical filter devices are adapted to filter red, green and blue light.

6. The 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.

7. The light sensor device of claim 6, wherein an output of at least one of said amplifier stages is coupled to filter means.

8. The 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.