LED module

• US 6,890,085 B2
• Filed: 04/14/2003
• Issued: 05/10/2005
• Est. Priority Date: 04/12/2002
• Status: Expired due to Term

• Current Assignee: Optotronic GmbH (Inventronics (Hangzhou), Inc.)
• Original Assignee: Osram Opto Semiconductors GmbH (Ams-Osram AG)
• Inventors: Hacker, Christian
• Primary Examiner(s): Ward, John Anthony
• Application Number:
  US10/412,847
• Publication Number:
  US 20030214817A1
• Time in Patent Office: 757 Days
• Field of Search: 362/231, 362/236, 362/293, 362/545, 362/800
• US Class Current: 362/231
• CPC Class Codes: F21K 9/00 Light sources using semiconductor devices as light-generating elements, e.g. using light-emitting diodes [LED] or lasers
• CPC Class Codes: F21Y 2105/12 characterised by the geometrical disposition of the light-generating elements, e.g. arranging light-generating elements in differing patterns or densities
• CPC Class Codes: F21Y 2113/13 comprising an assembly of point-like light sources
• CPC Class Codes: G09F 13/0409 Arrangements for homogeneous illumination of the display surface, e.g. using a layer having a non-uniform transparency arrangements of reflectors G09F13/14
• CPC Class Codes: Y10S 362/80 Light emitting diode

Abstract

LED module for generating white light having a plurality of white-light LEDs including at least one LED with a central wavelength of between 495 nm and 507 nm, at least one LED with a central wavelength of between 511 nm and 529 nm, at least one LED with a central wavelength of between 586 nm and 602 nm, and at least one LED with a central wavelength of between 618 nm and 630 nm.

Claims

1. An LED module for generating white light, comprising:

a plurality of white-light LEDs,

at least one color LED with a central wavelength of between 495 nm and 507 nm,

at least one color LED with a central wavelength of between 511 nm and 529 nm,

at least one color LED with a central wavelength of between 586 nm and 602 nm, and

at least one color LED with a central wavelength of between 618 nm and 630 nm,

wherein the the white-light LEDs generate white light of a first spectrum and the LED module generates white light of a second spectrum by combining light emitted by the white-light LEDs with light emitted by the color LEDs, the first spectrum of white light being different from the second spectrum of white light.

2. The LED module as claimed in claim 1, wherein the module comprises:

2n LEDs with a central wavelength of between 495 nm and 507 nm,

2n LEDs with a central wavelength of between 511 nm and 529 nm,

n LEDs with a central wavelength of between 586 nm and 602 nm,

n LEDs with a central wavelength of between 618 nm and 630 nm, and

10n white-light LEDs,

where n is a natural number.

3. The LED module as claimed in claim 1, wherein brightness can be varied at least in the case of some of the color LEDs and/or the white-light LEDs relative to each other.

4. A multiple LED module comprising at least two LED modules as claimed in claim 1.

5. The LED module as claimed in claim 2, wherein the brightness can be varied at least in the case of some of the color LEDs and/or the white-light LEDs relative to each other.

6. A multiple LED module comprising at least two LED modules as claimed in claim 2.

7. The LED module as claimed in claim 2, wherein n is one of the numbers 1, 2, 3 and 4.

8. The LED module as claimed in claim 1, wherein the second spectrum of white light has a color temperature that can be varied by a variation of a brightness of the white light LEDs with respect to the brightness of the color LEDs.