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Method and apparatus for managing temperature of light emitting element, and lighting apparatus

A technology for lighting devices and light-emitting elements, which is applied to lighting devices, cooling/heating devices for lighting devices, and temperature control using electric methods. It can solve problems that cannot be ignored and difficult to implement temperature measurement devices, and achieve simplified circuit configuration. Effect

Inactive Publication Date: 2005-03-09
TDK CORPARATION
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

However, for example, in the case of observing the mounting state of electronic components, when the electronic components, mounting boards, etc. are miniature, and the color tone of their materials, etc. not to be ignored
In addition, when both the camera and the lighting device are miniaturized, it can also be assumed that the arrangement of the temperature measuring device in the lighting device itself becomes difficult to implement

Method used

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  • Method and apparatus for managing temperature of light emitting element, and lighting apparatus
  • Method and apparatus for managing temperature of light emitting element, and lighting apparatus
  • Method and apparatus for managing temperature of light emitting element, and lighting apparatus

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Embodiment Construction

[0026] Various aspects of the present invention are described in detail below with reference to the accompanying drawings. figure 1 is a block diagram of a schematic configuration of a lighting device according to an aspect of the present invention. in addition, figure 2 The actual arrangement of the measurement system for measuring voltage etc. is shown. The lighting device 1 according to this aspect of the invention comprises a light emitting diode (LED) 3, a power source 5 for powering the LED 3, a temperature control device (including a Peltier element) 7, a power source 9 for powering the temperature control device 7, and a voltage measurement system 11. In fact, if figure 2 As shown, the voltage measurement system 11 is set up to measure the voltage applied to the LED3.

[0027] As mentioned above, the voltage required to pass a constant current through LED3 varies with the temperature of LED3. Such as figure 2As shown, the variation of the temperature of LED3 i...

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Abstract

The present invention aims at providing a lighting apparatus which is simple in configuration and which is capable of providing a stable light quantity from a light source constituted by an LED or the like. In the present invention, attention is paid to the fact that an applied voltage to an LED changes in correspondence to a temperature of the LED, and hence a temperature control device constituted by a Peltier element or the like is operated in correspondence to the quantity of change in applied voltage to the LED.

Description

technical field [0001] The present invention generally relates to a lighting device comprised of light emitting elements such as light emitting diodes. More particularly, the present invention relates to a method and apparatus for managing the temperature of light emitting elements used in lighting devices capable of generating a stable luminous flux and having a long life. Background technique [0002] For example, there is known an inspection device that performs quality control of the object based on the photographed results by using a camera to photograph the inspection object. In such an inspection device, an illumination device for illuminating the object is simultaneously used in order to make the image of the object clearer. A plurality of light-emitting diodes (hereinafter referred to as LEDs) are used in this lighting device. This is due to the high directivity inherent in the light-emitting diodes, which does not require reflectors, etc., and is small in size and...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01L33/00H05B44/00
CPCH05B33/0842H05B45/18H05B45/56H05B45/00
Inventor 金子正明早见健一
Owner TDK CORPARATION
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