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38045results about How to "Improve yield" patented technology

LED lamp filament illuminating strip and preparation method therefor

The invention discloses an LED lamp filament illuminating strip and a preparation method therefor. The illuminating strip comprises LED chips in upper and lower rows, wherein all LED chips in the lower row are distributed at intervals, and all LED chips in the upper row are respectively connected between two adjacent LED chips in the lower row in a lap joint manner. The illuminating surfaces of the LED chips in the upper and lower rows are opposite to each other. The positive and negative electrodes of all LED chips in the upper row are respectively welded with the negative and positive electrodes of two adjacent LED chips, in lap joint connection with the LED chips in the upper row, in the lower row. The preparation method comprises the steps: coating solder paste on the positive and negative electrodes of all LED chips in the lower row; heating the solder paste and enabling the solder paste to be melted, welding the corresponding electrodes, coating the front and back surfaces of chip strips in series connection with fluorescent glue, and solidifying the fluorescent glue. The illuminating strip employs the chips which are not overlapped with each other, and the illuminating surfaces of the chips are arranged oppositely, thereby improving the light-emitting uniformity and facilitating heat dissipation. The wire crossing and tandem among chips is avoided, the packaging cost is reduced, and the yield of finished products is improved.
Owner:SHANDONG INSPUR HUAGUANG OPTOELECTRONICS

Automatic optical detection method and automatic optical detection system

The invention relates to an automatic optical detection method and an automatic optical detection system. The method comprises the following steps: obtaining liquid crystal screen images in preset display states of multiple pure colours, grey-scale images, grey-level images and multi-colour alternating images respectively; processing the liquid crystal screen images in the obtained display states, judging whether a liquid crystal screen has defects or not, if so, then identifying the types of the defects, recording the positions of the defects, and counting the number of the defects; obtaining the liquid crystal screen images of the turned-off liquid crystal screen in an external light irradiation state; processing the liquid crystal screen images in the obtained external light irradiation state, and judging whether the liquid crystal screen has appearance defects or not. According to the automatic optical detection method and the automatic optical detection system provided by the invention, brightness, dark spots, bright lines, dark lines, surface defects and appearance defects can be detected, defect detection types are increased, unqualified products are reduced, the quality of the liquid crystal screen is improved, a production line can be improved, and the production yield of the liquid crystal screen can be increased.
Owner:EVOC SMART IOT TECH CO LTD
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