A LED module with temperature signal output and detection current signal output and its application circuit

Abstract

The present invention discloses an LED module with a temperature signal output and a detection current signal output and an application circuit thereof. The LED module at least comprises an LED substrate, an LED chip group, a current detection device and a temperature detection device. The current detection device and the chip group are connected in series and then are packaged in the LED substrate. The temperature detection device is installed on the LED substrate. The upper and lower sides of the LED substrate are provided with positive and negative electrodes, the polarity of the electrodes at the same side are the same, and the leading-out end of each electrode is provided with a conductive pad. The application circuit comprises multiple groups of LED modules and an external control conversion circuit which comprises an A / D converter, a controller MCU and a D / A converter. The output ends of the current detection device and the temperature detection device of each group of LED modules are connected to the input end of the A / D converter, and the A / D converter is connected to a D / A converter through a controller. According to the LED module and the application circuit, the series and parallel connection between the LED modules is facilitated, the replacement is convenient, the working current and temperature of a single LED module are monitored at any time according to needs, and the normal working of an LED light source is ensured.

Description

technical field [0001] The invention relates to the field of high-power LED packaging, in particular to an LED module with temperature signal output and detection current signal output and an application circuit thereof. Background technique [0002] At present, high efficiency and high power are one of the main development directions of LEDs. Due to the complex structure and process of high-power LED packaging, which directly affects the performance and life of LEDs, it has been a research hotspot in recent years. Usually in the LED light source, in order to enhance the light intensity of the LED light source, a certain number of LEDs with required wavelengths are packaged on a specific cooling substrate. Constitute an LED light source module. An LED light source is composed of multiple modules, and then assembled into light sources with different structures according to the characteristics of the light source. Commonly used LED light sources can be divided into: surface l...

AI Technical Summary

Problems solved by technology

[0004] (1) LEDs in the overall series form have the characteristics of simple circuit and convenient connection. However, because the LEDs are in series form, when one of the LEDs has an open circuit failure, it will cause the entire LED light string to go out, which affects the reliability of use. ;

[0005] (2) In the form of overall parallel connection, the voltage on each LED is equal, but the LED is a current-type device, and a small change in the voltage applied to the LED will cause a change in the current. Even if the same batch of LEDs, there are differences in performance. Uneven LED current distribution may cause some LED currents to be too large, resulting in a sharp reduction in life, or even burnout;

If there is a problem with the LED light source module, it is impossible to specifically judge and form a protection

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