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Sorting device and sorting method for detecting quality of miniature LED chip

An LED chip and miniature technology, which is used in measuring devices, measuring electricity, measuring electrical variables, etc., can solve the problems of low accuracy, difficult sorting of MicroLED chips, and complicated detection process of MicroLED, so as to achieve rapid detection and improve efficiency. Effect

Pending Publication Date: 2021-10-29
乙力国际股份有限公司
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  • Abstract
  • Description
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  • Application Information

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Problems solved by technology

[0006] The present invention has the following objectives: 1. Solve the problem that Micro LED chips are difficult to s

Method used

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  • Sorting device and sorting method for detecting quality of miniature LED chip
  • Sorting device and sorting method for detecting quality of miniature LED chip
  • Sorting device and sorting method for detecting quality of miniature LED chip

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Embodiment 1

[0048] This embodiment provides a sorting device for micro-LED chips. The micro-LED chip 1 includes a chip substrate 15 and a plurality of LED chips 11 fixed on the chip substrate 15; the plurality of LED chips 11 have a common first a negative electrode 12, and a plurality of LED chips 11 respectively have an independent first positive electrode 13;

[0049] The sorting device includes an electrical performance detection unit 2, and the electrical performance detection unit 2 includes a detection unit main body 21 and a second positive electrode 22 and a second negative electrode 23 located on the detection unit main body 21;

[0050] The micro-LED chip 1 is located above the sorting device; and the first positive electrodes 13 of the plurality of LED chips 11 are electrically connected to the second positive electrodes 22, and the first negative electrodes 12 are electrically connected to the second positive electrodes 22. The second negative electrode 23 is electrically con...

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Abstract

The invention discloses a sorting device and sorting method for detecting the quality of a miniature LED chip (1). The miniature LED chip (1) comprises a chip substrate (15) and a plurality of LED wafers (11), wherein the plurality of LED wafers (11) are provided with a common first negative electrode (12) and are respectively provided with an independent first positive electrode (13). The sorting device comprises an electrical performance detection unit (2), wherein the electrical performance detection unit (2) comprises a detection unit main body (21), a second positive electrode (22) and a second negative electrode (23). According to the invention, a plurality of LED wafers (11) are electrically connected to an electrical performance detection unit (2) in a common cathode and common anode mode, and when the electrical performance detection unit (2) is connected with an external power supply, the plurality of LED wafers (11) are equivalently connected to the power supply in a parallel connection mode, so that the light emitting conditions of the plurality of LED wafers (11) are detected at the same time, regional detection is completed, the efficiency is improved compared with the previous single lighting, and rapid quality detection can be realized by the miniature LED.

Description

technical field [0001] The patent of the invention belongs to the technical field of micro-LED display screens, and specifically relates to a sorting device and a sorting method for detecting the quality of micro-LED chips. Background technique [0002] Micro LED (micro LED) displays have the advantages of high resolution, high brightness, low power consumption, high color saturation, and long life. It can adapt to various sizes and seamless splicing and other advantages. For now, it has the potential for next-generation display technology. [0003] Before Micro LED chips are bonded, there will inevitably be damage, loss, etc. during the production process. If qualified products, defective products, and unqualified products are not sorted out in advance, the downstream production line of the first choice will cause defective and substandard displays. Second, the downstream production line of unqualified products will produce more scrap products, which means that if the qua...

Claims

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Application Information

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IPC IPC(8): G01R31/01G01R31/28G01N21/88G01N21/95G01N21/84H01L33/00
CPCG01R31/01G01R31/2884G01R31/2887G01R31/2891G01R31/2894G01N21/84G01N21/95G01N21/8851H01L33/0095G01N2021/8477G01N2021/9511
Inventor 林俊荣王宏吕河江
Owner 乙力国际股份有限公司
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