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Method for fast tuning angle of LED chip

A LED chip, chip technology, applied in the direction of electrical components, circuits, semiconductor devices, etc., can solve the problem of difficult chip positioning

Inactive Publication Date: 2010-07-14
DG HUST MFG ENG RES INST +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, since the angle correction of any chip needs to rotate the entire chip membrane, this will cause the positions of all other chips on the chip membrane to change accordingly, which will bring great difficulties to the precise positioning of subsequent chips

Method used

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  • Method for fast tuning angle of LED chip
  • Method for fast tuning angle of LED chip
  • Method for fast tuning angle of LED chip

Examples

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Embodiment Construction

[0066] The present invention will be further described in conjunction with the following examples:

[0067] An embodiment of a method for quickly adjusting the angle of an LED chip of the present invention is as follows: figure 1 shown, including the following steps:

[0068] Step 101. Drive the image recognition system to identify the chip film, and obtain the original position coordinate X of chip i on the chip film i , Y i and deflection angle θ i , wherein, i is one of the chips on the chip film, i=1, 2, 3...n, n is the total number of chips on the chip film. What is obtained in this step is the original position coordinate X of all chips on the chip film i , Y i and deflection angle θ i . The coordinates of the chip i on the chip film and the deflection angle relative to the standard coordinate system of the machine tool are fixed.

[0069] Step 102. Obtain the position coordinate O of the rotation center of the chip membrane x , O y . The deflection angle θ of...

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Abstract

The invention relates to a method for fast tuning the angle of LED chip. The method mainly comprises: including the chip into an angle interval; obtaining a rotating pivot angle of the angle interval; selecting the p angle interval, and rotating the chip film according to the rotating pivot angle of the angle interval, wherein, p is equal to 1; positioning the chip m according to the theoretical position coordinates X'm and Y'm after theoretical rotation, and obtaining deviation Lambada x and Lambada y between X'm and Y'm and the actual position of the chip after actual rotation; judging whether Lambada x and Lambada y are larger than a certain threshold, if yes, amending Ox and Oy according to Lambada x and Lambada y and correcting the position of the chip; if no, correcting the position of the chip according to the theoretical position coordinates X'm and Y'm after theoretical rotation; judging whether the chip in the p angle interval is selected and finished, if yes, ending the angle tuning of the chip in the angle interval; proceeding to the angle tuning of the chip of the next angle interval. The invention can improve accuracy of chip angle tuning, effectively reduce the overall chip tuning times and enhance chip angle tuning efficiency, and increase chip sorting speed.

Description

technical field [0001] The invention relates to the technical field of LED chip sorting, in particular to a method for quickly adjusting the angle of LED chips. Background technique [0002] Usually, in the LED chip sorting process, some chips will have a deflection angle due to the adhesive force on the film and the adhesive force between the chips when the chip film is expanded before the chip sorting. The deflection angle is relative to the standard of the machine tool. The angle of the coordinate system. However, after sorting the LED chips, it is required that the chips be neatly arranged on the chip film in the form of square sheets according to the type, and only a small angle deviation is allowed to facilitate the packaging of the LED chips. If the chip has angle deviation, it needs to be realized by angle correction. However, since the angle correction of any one chip needs to rotate the entire chip membrane, this will cause the positions of all other chips on the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01L33/00
Inventor 李斌吴涛黄禹李海洲龚时华王龙文林康华李文杰
Owner DG HUST MFG ENG RES INST
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