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Method for increasing optical output of semiconductor led using pulsation current and a driving unit of the semiconductor led using the method

A technology of light-emitting devices and drive units, which is applied in semiconductor devices, electric solid-state devices, electroluminescent light sources, etc., and can solve problems such as burden, cost and time investment, and heavy manufacturers

Inactive Publication Date: 2005-11-16
SAMSUNG ELECTRONICS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

A large amount of cost and time is invested in this research, which places a heavy burden on the manufacturer

Method used

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  • Method for increasing optical output of semiconductor led using pulsation current and a driving unit of the semiconductor led using the method
  • Method for increasing optical output of semiconductor led using pulsation current and a driving unit of the semiconductor led using the method
  • Method for increasing optical output of semiconductor led using pulsation current and a driving unit of the semiconductor led using the method

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Embodiment Construction

[0034] Hereinafter, a method for increasing the light output of a semiconductor LED according to an embodiment of the present invention, and the structure and operation of a semiconductor LED driving unit will be described in detail with reference to the accompanying drawings.

[0035] In the experiment, the inventors of the present invention applied a pulsating current in which the forward voltage and the reverse voltage alternated to the semiconductor LED, as Figure 5 , so as to solve the above problems. In addition, the inventors applied a pulsating current in which only forward voltage occurs periodically without reverse voltage to the same semiconductor LED, as Figure 4 As shown, thereby comparing the intensity of the emitted light, that is, the light output. The semiconductor LED used for this experiment was a UV LED lamp which emitted light having a wavelength of 402 nm, and the duty ratio of the pulsating current was 50%. here, by image 3 It can be seen that the ...

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Abstract

Provided is a method of increasing an optical output of a semiconductor light-emitting device using a pulsation current and a driving unit of the semiconductor light-emitting device using the method. The method includes: applying a pulsation current in which a forward voltage alternates with a reverse voltage to the semiconductor light-emitting device including an n-type semiconductor layer, an active layer, and a p-type semiconductor layer. The driving unit includes: a semiconductor light-emitting device including an n-type semiconductor layer, an active layer, and a p-type semiconductor layer; and a voltage applying unit which applies a pulsation current in which a forward voltage alternates with a reverse voltage to the semiconductor light-emitting device.

Description

technical field [0001] The present invention relates to a method of increasing light output of a compound semiconductor light emitting device (LED) and a drive unit of a compound semiconductor LED, and more particularly, to a method of increasing light output of a compound semiconductor LED using a pulsation current And a driving unit of a compound semiconductor LED using the method. Background technique [0002] Similar to light-emitting diodes (LEDs), semiconductor LEDs use the properties of compound semiconductors to convert electrical signals into light. Such a semiconductor LED device has the advantages of longer lifetime, lower driving voltage, and lower power consumption than other light emitters. In addition, semiconductor LEDs have high response speed and high impact resistance, and can be made compact and light. Depending on the type and material of the semiconductor used, such semiconductor LEDs can produce light beams of different wavelengths. Thus, semiconduc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01L33/00H01L27/15H05B44/00
CPCH05B33/0845H05B33/0818H05B45/10
Inventor 赵济熙
Owner SAMSUNG ELECTRONICS CO LTD