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Illumination device

A technology for light-emitting devices and motor vehicles, applied in lighting devices, electroluminescent light sources, light sources, etc., can solve the problems of inconsistent appearance of light-emitting devices, insufficient compensation for operating conditions, etc.

Inactive Publication Date: 2018-10-23
BAYERISCHE MOTOREN WERKE AG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

This has the disadvantage that locally different operating conditions of the individual LED units are only insufficiently compensated, which can lead to a non-uniform appearance of the luminaire

Method used

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Embodiment approach

[0023] Hereinafter, an embodiment of the present invention will be described with the aid of a light-emitting device which is constructed as an interior illuminator in a motor vehicle and includes a plurality of multicolor LED units 3 arranged on a belt as light-emitting devices. These multi-color LED units (hereinafter also referred to as LED units for short) are respectively a single semiconductor component including a plurality of single-color LEDs 301 to 304 and a microcontroller 4. The monochromatic LED and the microcontroller and the temperature sensor described further below are integrated in a common housing of the semiconductor component. The single color LED 301 is a red LED, the single color LED 302 is a green LED, the single color LED 303 is a blue LED, and the single color LED 304 is a white LED. With the strip-shaped LED units, a very high packing density can be achieved (144 to 367 LEDs per meter according to the shape of the housing).

[0024] Each LED unit 3 is ...

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PUM

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Abstract

The invention relates to an illumination device, in particular for a motor vehicle, comprising one or more multi-color LED units (3) which each have a settable brightness and a settable color point. Each multi-color LED unit (3) is an individual semiconductor component having multiple single-color LEDs (301, 302, 303, 304) of different colors and a microcontroller (4), wherein the single-color LEDs (301, 302, 303, 304) and the microcontroller (4) are surrounded by a housing of the semiconductor component. A temperature sensor (TS) which measures a current temperature value of the associated multi-color LED unit (3) and supplies this value to the microcontroller (4) is integrated in the semiconductor component. The microcontroller (4) is designed to control an associated multi-color LED unit (3) depending on the current temperature value of the associated multi-color LED unit (3).

Description

Technical field [0001] The invention relates to a light-emitting device, especially a light-emitting device for a motor vehicle. Background technique [0002] It is known from the prior art to use multicolor LED units for light emitting devices in motor vehicles. These LED units include multiple monochromatic LEDs and are usually manipulated by LED drivers in order to change the brightness and color position (ie, mixed colors). For this purpose, a module with a microprocessor is used, which on the one hand assumes the communication with the motor vehicle data bus and on the other hand drives the LED unit, usually via a PWM output. Here, the so-called LIN bus (LIN=Local Interconnect Network) is usually used as a vehicle data bus. [0003] In addition, new types of multi-color LED units with integrated circuits are known from the prior art. In these LED units, each single-color LED and integrated circuit are placed in a common housing, thereby achieving high packaging density. Ea...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H05B33/08H05B44/00
CPCH05B45/28
Inventor R·伊泽勒F·阿尔庭格J·布吕格尔
Owner BAYERISCHE MOTOREN WERKE AG
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