Luminance regulation in edge regions

Patent metadata

Field	Value
Publication number	US-10189397-B2
Application number	US-201615766400-A
Country	US
Kind code	B2
Filing date	Sep 7, 2016
Priority date	Oct 13, 2015
Publication date	Jan 29, 2019
Grant date	Jan 29, 2019

Abstract

According to the present disclosure, a method for operating an illumination apparatus is provided. The method has at least two light-emitting devices, which are arranged next to one another separated by a gap and each have a multiplicity of light-emitting elements, by individually driving all light-emitting elements of each light-emitting device, measuring a gap width of the gap and/or a luminance in the gap, and controlling or regulating in each case a luminance of one or more of the light-emitting elements which are arranged directly at the gap in dependence on the gap width and/or on the luminance in the gap.

First claim

The invention claimed is:

1. A method for operating an illumination apparatus, having at least two light-emitting devices, which are arranged next to one another separated by a gap and each have a multiplicity of light-emitting elements, by
individually driving all light-emitting elements of each light-emitting device,
measuring a gap width of the gap and/or a luminance in the gap, and
controlling or regulating in each case a luminance of one or more of the light-emitting elements which are arranged directly at the gap in dependence on the gap width and/or on the luminance in the gap.

2. The method as claimed in claim 1 , wherein in the method a measurement of a luminance of each of the one or more of the light-emitting elements which are arranged directly at the gap is further performed and
the controlling or regulating is performed also in dependence on the corresponding measurement value/values.

3. The method as claimed in claim 2 , wherein the measurement of the luminance is performed in pulsed fashion at ambient temperature or in a thermally stabilized on-state.

4. The method as claimed in claim 1 , wherein, during the controlling or regulating, a luminance of one of the light-emitting elements that are arranged directly at the gap is adapted to an average luminance of all the light-emitting elements, or a multiplicity of the light-emitting elements, of the light-emitting devices.

5. The method as claimed in claim 1 , wherein the light-emitting elements located in a second and/or third row behind the light-emitting elements that are arranged directly at the gap are also affected by the controlling or regulating.

6. The method as claimed in claim 1 , wherein the illumination apparatus has at least one further light-emitting device, wherein respective corners of each of the light-emitting devices are arranged in mutually adjoining fashion and, for the controlling or regulating of a light-emitting element at one of the corners of one of the light-emitting devices, in each case a luminance of a light-emitting element of each of the other corners is taken into consideration.

7. The method as claimed in claim 1 , wherein, during the controlling or regulating, a luminance of one of the light-emitting elements that are arranged at an edge region of the respective light emitting device that is not directly adjoined by a light-emitting device is adapted to an average luminance of all light-emitting elements of the light-emitting devices.

8. The method as claimed in claim 1 , wherein the controlling or regulating is performed by means of a correction matrix.

9. An illumination apparatus for a motor vehicle, having
at least two light-emitting devices, which are arranged next to one another separated by a gap and each have a multiplicity of light-emitting elements, and
a control device for individually driving all light-emitting elements of each light-emitting device,
a memory device for providing a measurement of a gap width of the gap and/or a luminance in the gap, wherein
the control device is configured for controlling or regulating in each case a luminance of one or more of the light-emitting elements which are arranged directly at the gap in dependence on the gap width and/or on the luminance in the gap.

10. A motor vehicle having an illumination apparatus as claimed in claim 9 .

Assignees

• Osram Gmbh

Inventors

• Fiederling Roland
• Kürschner Ronny
• Feil Thomas

Classifications

• H05B45/14

  using electrical feedback from LEDs or from LED modules · CPC title

• F21S41/663

  by switching light sources (by switching incandescent light sources F21S41/162) · CPC title

• F21S41/155

  Surface emitters, e.g. organic light emitting diodes [OLED] · CPC title

• F21S41/153 Primary

  arranged in a matrix · CPC title

• B60Q1/1415 Primary

  Dimming circuits · CPC title