Lighting device having semiconductor light sources and a common diffusor

• US 9,976,706 B2
• Filed: 05/27/2013
• Issued: 05/22/2018
• Est. Priority Date: 05/31/2012
• Status: Expired due to Fees

• Current Assignee: OSRAM GmbH (Ams-Osram AG)
• Original Assignee: OSRAM GmbH (Ams-Osram AG)
• Inventors: Schwalenberg, Simon, Muschaweck, Julius
• Primary Examiner(s): PAYNE, SHARON E
• Application Number:
  US14/404,478
• Publication Number:
  US 20150109775A1
• Time in Patent Office: 1,821 Days
• CPC Class Codes: F21K 9/60 Optical arrangements integrated in the light source, e.g. for improving the colour rendering index or the light extraction
• CPC Class Codes: F21K 9/61 using light guides
• CPC Class Codes: F21V 23/0457 the sensor sensing the operating status of the lighting device, e.g. to detect failure of a light source or to provide feedback to the device
• CPC Class Codes: F21V 29/50 Cooling arrangements air-treatment systems dissipating or using the heat of lighting fixtures F24F3/056
• CPC Class Codes: F21Y 2115/10 Light-emitting diodes [LED]
• CPC Class Codes: F21Y 2115/30 Semiconductor lasers
• CPC Class Codes: G02B 6/0051 Diffusing sheet or layer
• CPC Class Codes: H05B 45/22 using optical feedback

Abstract

The invention relates to a lighting device (11; 31; 41; 51) which is equipped with a plurality of semiconductor light sources (14, 15) of different colors, downstream of which a common diffusor (17) is arranged, wherein the lighting device (11; 31; 41; 51) has at least one light sensor (21) optically coupled to the diffusor (17).

Claims

1. A lighting device comprising a plurality of semiconductor light sources of different colors, downstream of which a common diffuser is disposed, wherein the lighting device has at least one light sensor optically coupled to the diffuser,

wherein the semiconductor light sources are arranged on a substrate and are potted with a potting material serving as the diffuser, and the substrate has at least one through hole which can be arranged for an optical via which optically couples to the diffuser, and

wherein the optical via is coupled to a common optical waveguide at their side facing away from the light-emitting side of the semiconductor light sources and diffuser, which optical waveguide runs to the at least one light sensor.

2. The lighting device as claimed in claim 1,

wherein a common optical via is assigned to the plurality of semiconductor light sources.

3. The lighting device as claimed in claim 1,

wherein the at least one optical via is embodied as a heat conducting element.

4. The lighting device as claimed in claim 1,

wherein the substrate has an optical via which is coupled to the optical waveguide on the rear side and is coupled to the light sensor on the front side.

5. The lighting device as claimed in claim 1,

wherein said through hole is filled with a light-guiding and transparent material.

6. The lighting device as claimed in claim 5,

wherein the light-guiding and transparent material includes epoxy resin, silicone, polycarbonate (PC), cyclo-olefin copolymer (COC) and polymethyl methacrylate (PMMA).

7. The lighting device as claimed in claim 1,

wherein said through hole is filled with air.