LED (Light-Emitting Diode) light source array projection testing device

Abstract

The invention provides an LED (Light-Emitting Diode) light source array projection testing device. The LED light source array projection testing device comprises a beam-expanding element which is positioned at the back end of the light path of a tested LED light source array, a projection element positioned at the back end of the light path of the beam-expanding element, and a projection surface positioned at the back end of the light path of the projection element, wherein light beams emitted by the tested LED light source array are projected onto the projection surface through the projection element after being expanded by the beam-expanding element; a single LED light source in the tested LED light source array corresponds to a position on the projection surface. According to the LED light source array projection testing device, a light source matrix module can be presented on any plane in a similar projection way by using a lens and a reflecting mirror, and a fault point can be found by means of visual inspection. The device is simple in structure, convenient and rapid in the testing process, and low in cost.

Description

technical field [0001] The invention relates to the field of illumination and display, in particular to an LED light source array projection test device. Background technique [0002] Today, when advocating energy-saving, environmentally friendly and low-carbon life, light-emitting diodes (LEDs) are more and more widely used in the fields of lighting, display and communication. As a result, the demand for high-power-density LED lighting sources and high-density small-pitch LED displays continues to increase. [0003] High power density LED lighting source is a new packaging form of small size and high power LED derived to meet the market demand for high power lighting source. Its appearance solves the shortcomings of large size and high cost of high-power light sources. Due to its high integration and low cost, it will become an inevitable trend in the development of high-power lighting sources for indoor and outdoor and special occasions. [0004] Similarly, the high-defi...

AI Technical Summary

Problems solved by technology

[0005] However, whether it is a high-power-density LED lighting source or a high-definition small-pitch LED display, its characteristics are that the size of the LED chip is small and the integration is high, so the requirements for the packaging process are higher.

Since the current LED integrated packaging mainly relies on gold wire connection, there are still some shortcomings in the yield of high-density LED products.

At the same time, these two types of high-density LED products have high brightness when they are turned on. It is impossible to observe the number and location of dead pixels with eyes.

This leads to the inability to perform simple manual screening of products at the initial stage, thereby increasing equipment costs and product production and delivery time

[0006] The existing LED light source array test device has a complex structure, high cost, and the test method is not easy to operate. Therefore, it is an urgent problem for practitioners in the field to find a device that has a simple structure and can accurately find fault points in the LED light source array.

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