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Surface roughness recognizing and classifying method for LED chip

A technology of LED chip and surface roughness, which is applied in the field of identification and classification of the surface roughness of LED chips, can solve the problems of LED chip positioning operation troubles and other problems, achieve uniform brightness and avoid the effect of misoperation

Active Publication Date: 2009-11-11
EPILIGHT TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The automated microscope machine will treat the darker LED chip as the background and cannot be recognized, or it will shut down if it thinks it is not the same chip, which will cause trouble for the operation of positioning the LED chip with the automated microscope machine , such as when packaging LED chips

Method used

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  • Surface roughness recognizing and classifying method for LED chip

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Embodiment Construction

[0013] The identification and classification method of the LED chip surface roughness of the present invention is accomplished by a microscope and a gray scale identification system. figure 1 Be the flow chart of the present invention, introduce the step of the present invention in detail below:

[0014] Step 1: First put the gallium nitride-based LED chip under the microscope, the magnification is 10 times, and the magnification of the automatic microscope machine usually used for production is the same. At this time, an area with a certain brightness observed under the microscope is the position of the LED chip. LED chips with different surface roughness show different brightness under the microscope. Then use the CC integrated with the microscope to take pictures of the microscope image and save it.

[0015] Step 2: Use the grayscale recognition system to carry out grayscale recognition on the P electrode area and N electrode area of ​​the LED chip on the image saved in t...

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Abstract

The invention discloses a method for identifying and classifying the surface roughness of an LED chip. The method comprises the following steps: (1) putting the LED chip into the microscope and observing the P electrode area and the N electrode area of ​​the LED chip, and take a microscope image; (2) utilize the grayscale recognition system to carry out grayscale recognition on the P electrode region and the N electrode region of the LED chip in the microscope image, and output the grayscale value; (3) convert the measured (4) When the operation under the microscope is required, the LED chips of the same type classified according to step (3) are used as the same batch for assembly line operation. The LED chips sorted according to the method of the invention can be identified smoothly and accurately when working under an automatic microscope, and are suitable for sorting LED chips with different surface roughnesses.

Description

technical field [0001] The invention relates to a method for identifying and classifying the surface roughness of an LED chip, in particular to a method for identifying and classifying the roughness of a gallium nitride-based LED chip. Background technique [0002] Due to its special physical and chemical properties, semiconductor light-emitting diodes (LEDs) have the following advantages: high efficiency and energy saving, power consumption is one-eighth of incandescent lamps, and one-half of fluorescent lamps; solid structure, can be used in harsh environments , with a service life of up to 100,000 hours, ten times higher than the current incandescent lamp; no mercury, chromium and other toxic heavy metal elements, easy to recycle, and realize true green lighting; simple structure, small size, light weight, fast response, and low working voltage , has the advantages of safety and earthquake resistance, and is internationally recognized as a new generation of light sources ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01L21/66G01B11/30
Inventor 姜森来梁国荣李智武
Owner EPILIGHT TECH