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Method and system for pulsed LED light source

A technology of LED light source and light pulse, which is applied in the field of pulsating light control and can solve problems such as insufficient light output

Active Publication Date: 2017-10-27
郑明
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Conventional high-speed LED flash systems have insufficient light output at ultra-short pulses, requiring expensive image intensifiers to enhance image quality

Method used

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  • Method and system for pulsed LED light source
  • Method and system for pulsed LED light source
  • Method and system for pulsed LED light source

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Embodiment Construction

[0024] The following description will enable any person skilled in the art to make and use the invention, and is provided in the context of the detailed application and claims. Variations on the disclosed embodiments will be apparent to those of ordinary skill in the art, and the general principles applied to other embodiments and applications are still within the scope of the invention. Thus, the invention is not limited to the disclosed embodiments, which are consistent with the broad scope of the principles and features disclosed herein.

[0025] see figure 1 , is a schematic diagram of a light emitting diode driving circuit for driving a light emitting diode LED. Power V CC via an external resistor R EXT Give an external capacitor C EXT form of capacitor charging. The capacitors and resistors are typically external, but can optionally be integrated with the driver circuit. In order to reduce the capacitance C EXT and the overall resistance between the LED and the l...

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Abstract

The invention relates to a method and system for a pulsed LED light source. The invention discloses a circuit comprising a first light-emitting diode with an electrical input terminal and an electrical output terminal, and the first light-emitting diode is used for emitting light when a current flows between the electrical input terminal and the electrical output terminal. The first LED is combined with a charge storage device for storing charges. The circuit further includes a second switch for switchably discharging charge through the first light-emitting diode so that light on it is emitted; and a first switch for switching the electrical input and electrical output To a relative potential between them, the relative potential is used to stop the first LED from emitting light.

Description

technical field [0001] The invention relates to pulsating light control, in particular to a control circuit and method for driving an LED light source to generate pulsating light. Background technique [0002] High-speed photography is widely used in scientific research and industrial product development. For example, high-speed imaging is a common technique for imaging high-pressure injection fuel spray in internal combustion engines, imaging the development of shock waves, and imaging combustion flame spread. To improve image quality and increase image capture speed, high-intensity lighting is required to increase camera exposure. In particular, pulsed lasers are used in such imaging systems to generate brief bursts of high-speed and high-intensity illumination to produce sufficient exposure within extremely short exposure times. Unfortunately, such pulsed lasers are much more expensive than LED systems. [0003] LED brightness is directly proportional to current. The ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H05B37/02F21K9/00
CPCG03B39/00H05B45/10H05B45/44
Inventor 郑明于水
Owner 郑明