Device with light emitting diodes

• US 10,020,294 B2
• Filed: 11/13/2017
• Issued: 07/10/2018
• Est. Priority Date: 11/16/2016
• Status: Active Grant

• Current Assignee: Melexis Technologies NV (Sensinnovat BVBA)
• Original Assignee: Melexis Technologies NV (Sensinnovat BVBA)
• Inventors: Spiegler, Sebastian, Freitag, Thomas, Bender, Michael
• Primary Examiner(s): King, Monica C
• Application Number:
  US15/810,827
• Publication Number:
  US 20180138161A1
• Time in Patent Office: 239 Days
• CPC Class Codes: H01L 25/0753 the devices being arranged next to each other
• CPC Class Codes: H01L 25/167 comprising optoelectronic devices, e.g. LED, photodiodes
• CPC Class Codes: H01L 27/1446 in a repetitive configuration
• CPC Class Codes: H01L 31/02162 for filtering or shielding light, e.g. multicolour filters for photodetectors
• CPC Class Codes: H01L 33/60 Reflective elements
• CPC Class Codes: H05B 45/12 using optical feedback
• CPC Class Codes: H05B 45/22 using optical feedback
• CPC Class Codes: H05B 47/18 via data-bus transmission

Abstract

A multi-LED device comprises a transparent substrate, a plurality of light emitting diodes, LEDs, arranged for emitting light of a plurality of colors and disposed on the transparent substrate, an integrated control circuit in connection with the LEDs and comprising a plurality of photo sensors optically connected to the LEDs. Each photo sensor is provided with a color filter. The integrated circuit is arranged for receiving via the plurality of photo sensors information on a light intensity of the plurality of colors of the LEDs and for regulating the light intensity of the colors of the LEDs based on the information on the light intensity. The transparent substrate with the plurality of LEDs is flip-chip mounted on the integrated control circuit.

Claims

1. A multi-LED device comprising

a transparent substrate,

a plurality of light emitting diodes, LEDs, arranged for emitting light of a plurality of colours and disposed on said transparent substrate,

an integrated control circuit in connection with said LEDs and comprising a plurality of photo sensors optically connected to said LEDs, each photo sensor being provided with a colour filter, said integrated circuit arranged for receiving via said plurality of photo sensors information on a light intensity of said plurality of colours of said LEDs and for regulating said light intensity of said colours of said LEDs based on said information on the light intensity,

wherein said transparent substrate with said plurality of LEDs is flip-chip mounted on said integrated control circuit.

2. The multi-LED device as in claim 1, wherein said plurality of LEDS is disposed on said substrate in parallel between a first and a second interconnection.

3. The multi-LED device as in claim 1, wherein said integrated control circuit is mounted on said substrate.

4. The multi-LED device as in claim 1, wherein said integrated control circuit comprises a temperature sensing unit.

5. The multi-LED device as in claim 1, wherein said integrated control circuit comprises at least one current sensing unit.

6. The multi-LED device as in claim 1, wherein said integrated control circuit comprises at least one voltage sensing unit.

7. The multi-LED device as in claim 1, wherein said integrated control circuit comprises a communication interface.

8. The multi-LED device as in claim 7, wherein said communication interface is a Local Interconnect Network, LIN, bus interface.

9. The multi-LED device as in claim 1, wherein said integrated control circuit comprises data storage means.

10. The multi-LED device as in claim 1, comprising a light releasing tab between adjacent LEDs.