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Light source driving device and light source driving method

A technology for driving light source and driving voltage, applied in the direction of light source, electric light source, lighting device, etc., can solve the problems of LED string damage and large instantaneous current of LED string, and achieve the effect of avoiding damage

Inactive Publication Date: 2018-12-04
CORETRONIC (SUZHOU) CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] When the existing driving device drives multiple LED strings, the current limiting device of the driving device cannot respond to changes in the current on the LED strings in a timely manner and change its current limiting value, which may cause LED strings to fail. Damage, for example, when the voltage surge generated by the poor contact of the circuit terminals may cause the instantaneous current on the LED string to be too large, resulting in damage to the LED string

Method used

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  • Light source driving device and light source driving method
  • Light source driving device and light source driving method
  • Light source driving device and light source driving method

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Embodiment Construction

[0022] The aforementioned and other technical contents, features and effects of the present invention will be clearly presented in the following detailed description of a preferred embodiment with accompanying drawings. The directional terms mentioned in the following embodiments, such as: up, down, left, right, front or back, etc., are only referring to the directions of the drawings. Accordingly, the directional terms are used to illustrate and not to limit the invention.

[0023] figure 1 is a schematic diagram showing a light source driving device according to an embodiment of the present invention. Please refer to figure 1 . The light source driving device 100 is used to drive a plurality of LED series LS ( figure 1 Three LED series LS1 , LS2 , LS3 are shown as an example), and the light source driving device 100 includes a driving unit 102 , a current limiting unit 104 and a control unit 106 . The driving unit 102 is coupled to a plurality of LED strings LS, wherein...

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Abstract

The invention discloses a light source driving device and a light source driving method. When the feedback voltage of the LED series falls outside the preset voltage range, the driving voltage of the LED series is adjusted to the initial voltage value, and the voltage value of the driving voltage is successively accumulated until the feedback voltage does not fall below the preset voltage range Outside the voltage range, to avoid voltage surges from damaging the LED strings, and corresponding to the load change of the LED strings, the drive unit outputs the most appropriate driving voltage to drive the LED strings, effectively protecting the LED strings and making them working normally.

Description

technical field [0001] The invention relates to a driving device, and in particular to a light source driving device and a light source driving method. Background technique [0002] With the increasing demand for energy saving and carbon reduction, light emitting diodes (light emitting diodes, LEDs) have gradually become a new generation of light sources due to their small size, power saving and durability. Light-emitting diodes have low operating voltage, can actively emit light, and have a certain brightness. The brightness can be adjusted by voltage or current. At the same time, it has the characteristics of impact resistance, vibration resistance, and long life (100,000 hours). Therefore, light-emitting diodes are widely used in various terminal equipment and lighting fields, such as automobile headlights, traffic lights, text displays, billboards and large-screen video displays, as well as ordinary architectural lighting and LCD backlights. to light-emitting diode appl...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H05B37/02H05B45/30
Inventor 邓天宇
Owner CORETRONIC (SUZHOU) CO LTD