Research on Registration Deviation Detection of Printed Glass LED Circuit Board

XI TIAN, GUO-SHENG ZHANG, XIAO-QING LIU, YANG LI

Abstract


To improve the registration accuracy, save the printing material, and optimize the printing space on printed glass circuit board for LED, the dual-cameras are introduced to capture the image of screen-printing plate. Considering the configuration of LED circuit, the dual-cameras are separately used to capture two parts of circuit image with 5𝑚𝑚 × 4𝑚𝑚 scale, which are from whole circuit with 200𝑚𝑚 × 100𝑚𝑚 scale. In this paper, the bolding pads are considered as the registration mark, the line fitting with global least square method is used to extract the image character points, and the registration deviation are calculated. According to this detection method, the registration printing experience results that the actual registration deviation ( 13𝜇𝑚 in x-direction, 14𝜇𝑚 in y-direction) satisfy the registration printing requirement of glass circuit board for LED (less than 30𝜇𝑚 in x-direction, and less than 24𝜇𝑚 in y-direction).

Keywords


Registering mark, LED, Printed glass circuit boardText


DOI
10.12783/dteees/peems2019/33979

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