LED drive system and backlight module with same

Abstract

The invention discloses a light emitting diode driving system and a backlight module with the light emitting diode driving system. The light emitting diode driving system is equipped on a circuit board with at least one light emitting diode and includes: a temperature detection module connected with the light emitting diode and including a thermoelectric conversion unit; a hysteresis voltage module electrically connected with the temperature detection module; and a current limiting module electrically connected with the hysteresis voltage module and the light emitting diode. Heat generated by the light emitting diode during work is transferred into the thermoelectric conversion unit and temperature of the thermoelectric conversion unit changes to generate of correspondent voltage; the hysteresis voltage module receives the voltage and generates a hysteresis voltage; and the current limiting module receives the hysteresis voltage and generates a driving current to drive the light emitting diode.

Description

technical field [0001] The present invention relates to a light emitting diode driving system and a backlight module with the light emitting diode driving system, in particular to a device capable of real-time measuring the temperature of a light emitting diode during operation and adjusting and driving the light emitting diode to emit light according to the measured temperature. A light-emitting diode drive system with a driving current value and a backlight module with the light-emitting diode drive system. Background technique [0002] In recent years, with the trend of reducing energy consumption and the thickness of liquid crystal display devices becoming thinner and thinner, backlight modules with several light-emitting diodes as light sources have gradually replaced traditional backlight modules with cold-cathode tubes as light sources, and become the current Mainstream products on the market. However, LEDs have several disadvantages that have yet to be overcome, tha...

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Problems solved by technology

That is to say, the known LED drive system cannot be integrated into the above-mentioned LED light stick, which causes the manufacturing process of the above-mentioned LED light stick to be relatively complicated, and the known LED drive system is also prone to heat transfer from the light-emitting diode due to heat conduction. The light rod fell off and the temperature of several LEDs could not be detected

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