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Method and device for detecting the light power emitted by an led light source

A technology of optical power and sensing devices, which is applied in the direction of electroluminescent light sources, measuring devices, photometry using electric radiation detectors, etc., can solve problems such as increased light output, and achieve the effect of improving analysis reliability

Active Publication Date: 2013-03-06
CONTINENTAL AUTOMOTIVE TECH GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Firstly the light output caused by the predetermined control signal has risen sharply

Method used

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  • Method and device for detecting the light power emitted by an led light source
  • Method and device for detecting the light power emitted by an led light source
  • Method and device for detecting the light power emitted by an led light source

Examples

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Embodiment Construction

[0023] figure 1 A structural block diagram of the device for detecting the optical power emitted by the LED light source according to the first embodiment of the present invention is shown.

[0024] The device shown has a control and regulation unit 3 which is formed by a microcomputer. The microcomputer provides control signals at its output for use by the LED light source 1 . The LED light source 1 emits light. A sensor device 2 is provided for detecting the light power emitted by the LED light source 1 . The sensing device also detects the light power caused by one or more ambient light sources 4 . The output signal of the sensor device 2 is fed to the control and regulation unit 3 , where it is evaluated and converted into a control signal for the LED light source 1 .

[0025] A signal corresponding to a binary code with an irregular bit sequence, preferably a signal corresponding to an RC5 code, is used as the control signal. This code has a total of 14 bits to be tr...

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PUM

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Abstract

In a method and a device for detecting the light power emitted by an LED light source, the LED light source is driven with a drive signal corresponding to a binary code. The light emitted by the LED light source is detected by means of a sensor system. The output signal of the sensor system is evaluated in a control and regulating unit. The LED light source is driven with a binary code having an irregular bit sequence.

Description

technical field [0001] The present invention relates to a method and a device for detecting the optical power emitted by an LED light source. The LED light source can eg be used in connection with LED headlights in the automotive industry, in connection with street lighting, in connection with hall lighting, in connection with lighting in shopping malls and wherever it is desired to create a uniform lighting appearance from multiple light sources. Background technique [0002] LEDs - especially high power LEDs - have undergone rapid development in recent years. Firstly the light output caused by the predetermined control signal has increased strongly. White LEDs have become so mature during this time that white LEDs can be used in the automotive industry as light sources for headlights. [0003] It is important for car manufacturers to be able to guarantee that these LEDs can be replaced, for example to replace a faulty LED. Here, it must be taken into account that the de...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01J1/02H05B33/08G01J1/44B60Q11/00G01J1/42H05B44/00
CPCH05B33/0818G01J1/02G01J1/44B60Q11/005G01J2001/4242G01J1/0214H05B33/0848G01J2001/4252G01J1/0295G01J1/4204G01J1/4257H05B45/14
Inventor S·贾诺多利S·霍尔津格
Owner CONTINENTAL AUTOMOTIVE TECH GMBH