Light-Generating Body

• US 20080094004A1
• Filed: 09/01/2005
• Published: 04/24/2008
• Est. Priority Date: 09/09/2004
• Status: Abandoned Application

• Current Assignee: Koninklijke Philips N.V.
• Original Assignee: Koninklijke Philips Electronics N.V. (Koninklijke Philips N.V.)
• Inventors: Ackermann, Bernd
• Application Number:
  US11/574,527
• Publication Number:
  US 20080094004A1
• Time in Patent Office: Days
• US Class Current: 315/294
• CPC Class Codes: H01L 25/167 comprising optoelectronic devices, e.g. LED, photodiodes
• CPC Class Codes: H01L 2924/00 Indexing scheme for arrangements or methods for connecting or disconnecting semiconductor or solid-state bodies as covered by H01L24/00
• CPC Class Codes: H01L 2924/0002 Not covered by any one of groups H01L24/00, H01L24/00 and H01L2224/00
• CPC Class Codes: H10K 50/85 Arrangements for extracting light from the devices
• CPC Class Codes: H10K 59/00 Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
• CPC Class Codes: H10K 59/35 comprising red-green-blue [RGB] subpixels
• CPC Class Codes: H10K 59/86 Series electrical configurations of multiple OLEDs
• CPC Class Codes: H10K 59/875 Arrangements for extracting light from the devices

Abstract

A light-generating body for emitting light of homogeneous intensity and color, having at least one organic light-emitting diode (22) that emits in a planar fashion in a first region of the spectrum, at least one non-organic light emitting diode (10,14) that emits in a conical shape in a second region of the spectrum, and an arrangement for mixing the light emitted by all the light-emitting diodes that includes a diffuser surface.

Claims

1. A light-generating body for emitting light of a homogeneous intensity and color, having

at least one organic light-emitting diode (22) that emits in a planar fashion in a first region of the spectrum

at least one non-organic light-emitting diode (10, 14) that emits in a conical shape (1, 2, 3, 4) in a second region of the spectrum, and

an arrangement for mixing the light emitted by all the diodes that includes a diffuser surface.

2. A light-generating body as claimed in claim 1, characterized in that the maximum emission of the organic light-emitting diode (22) that emits in a planar fashion in a first region of the spectrum is in the green region of the spectrum.

3. A light-generating body as claimed in claim 1, characterized in that the light-generating body also comprises at least one non-organic or organic light-emitting diode that emits in a third region of the spectrum.

4. A light-generating body as claimed in claim 3, characterized in that a first, a second and a third supply voltage for the light-emitting diodes that respectively emit in the first, second and third regions of the spectrum can be set independently of one another, to enable the color of the light emitted by the light-generating body to be varied.

5. A light-generating body as claimed in claim 3, characterized in that the maximum emission of the light-emitting diode that emits in the second region of the spectrum is in the red region of the spectrum, and the maximum emission of the light-emitting diode that emits in the third region of the spectrum is in the blue region of the spectrum.

6. A light-generating body as claimed in claim 5, characterized in that the numbers of light-emitting diodes (10, 22, 14) that emit in the first, second and third regions of the spectrum are substantially the same.

7. A light-generating body as claimed in claim 3, characterized in that the light-generating body comprises a further non-organic or organic light-emitting diode that emits in at least one further region of the spectrum.

8. A light-generating body as claimed in claim 7, characterized in that at least one further supply voltage for the light-emitting diodes that emit in at least one further region of the spectrum can be set independently of the other supply voltages, to enable the color of the light, having a high color-rendering index, that is emitted by the light-generating body to be varied.

9. A light-generating body as claimed in claim 1, characterized in that the organic light-emitting diode (22) that emits in the first region of the spectrum is intended to irradiate the diffuser surface directly, and the arrangement for mixing the light emitted by all the light-emitting diodes includes a reflector arrangement between the non-organic LED and the diffuser surface, which reflector arrangement is intended to distribute, in space, the light that is emitted in a conical shape (1, 2, 3, 4) by the non-organic light-emitting diodes (10, 14).

10. A light-generating body as claimed in claim 1, characterized in that the arrangement for mixing the light emitted by all the light-emitting diodes includes a light-guide panel (30) having a top face, a bottom face and a plurality of lateral faces that are intended for coupling in, distributing and coupling out light, the light from the non-organic light-emitting diodes (10, 14) being coupled in by at least one lateral face and the light from the organic light-emitting diodes (22) being coupled in by the top and/or bottom face.

11. A light-generating body as claimed in claim 1, characterized in that the arrangement for mixing the light emitted by all the diodes comprises a physically continuous diffuser surface (34) that is, in itself, curved, and the light-emitting diodes arranged inside the diffuser surface are intended to illuminate a large solid angle.