Light-emitting diode detection circuit and device

Abstract

The invention relates to a light-emitting diode detection circuit and a device. According to the light-emitting diode detection circuit, a sampling resistor is connected with a power source through afirst switch module, the sampling resistor is connected with the ground through a second switch module, and the sampling resistor is connected with a positive pole of a to-be-detected light-emitting diode; a third switch module is connected with the power source, and the third switch module is connected with a negative pole of the to-be-detected light-emitting diode; a fourth switch module is usedfor being connected with the ground, and the fourth switch module is connected with the negative pole of the to-be-detected light-emitting diode; the first input ends of a first comparator, a secondcomparator and a third comparator are all connected with the sampling resistor, and the second input ends of the first comparator, the second comparator and the third comparator are all connected witha reference power source; the output end of the first comparator, the output end of the second comparator and the output end of the third comparator are connected with an instruction module; throughforward electrifying and reverse electrifying for the light-emitting diode, the comparators output corresponding detection signals, and an electrical performance test of the light-emitting diode is realized; and the light-emitting diode detection circuit and the device are applicable to the detection of LED chips on COB boards.

Description

technical field [0001] The invention relates to the technical field of diodes, in particular to a light-emitting diode detection circuit and device. Background technique [0002] With the continuous development of technology, the LED (Light-Emitting Diode, light-emitting diode) application market is gradually mature. Among them, the COB (Chips on Board, chip on board package) light source is to paste the LED chip directly on the mirror metal substrate with high reflectivity. The high-efficiency integrated surface light source technology on the market, this technology eliminates the concept of brackets, no electroplating, no reflow soldering, no SMT process, reduces production costs, can carry out personalized design and COB has good heat dissipation performance, so COB is used in lighting The application has also become a trend and trend. [0003] Since the LED chip is packaged in the COB unit board, it is easy to have problems such as leakage of solid crystal, leakage of b...

AI Technical Summary

Problems solved by technology

[0004] Based on this, it is necessary to provide a light-emitting diode detection circuit and device for the problems that traditional detection equipment is prone to missed detection or misjudgment, and cannot detect LED chip leakage.

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