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Vision Inspection and Correction for DDI Protective Film Attachment

  • Kang, Jin-Su (Department of Electronic Engineering, Kumoh National Institute of Technology) ;
  • Kim, Sung-Soo (NDK) ;
  • Lee, Yong-Hwan (School of Electronic Engineering, Kumoh National Institute of Technology) ;
  • Kim, Young-Hyung (Department of IT Convergence, Kumoh National Institute of Technology)
  • Received : 2020.12.14
  • Accepted : 2020.12.29
  • Published : 2020.12.31

Abstract

DDI(Display Driver IC) are used to drive numerous pixels that make up display. For stable driving of DDI, it is necessary to attach a protective film to shield electromagnetic waves. When the protective film is attached, defects often occur if the film is inclined or the center point is not aligned. In order to minimize such defects, an algorithm for correcting the center point and the inclined angle using camera image information is required. This technology detects the corner coordinates of the protective film by image processing in order to correct the positional defects where the protective film is attached. Corner point coordinates are detected using an algorithm, and center point position finds and correction values are calculated using the detected coordinates. LUT (Lookup Table) is used to quickly find out whether the angle is inclined or not. These algorithms were described by Verilog HDL. The method using the existing software requires a memory to store the entire image after processing one image. Since the method proposed in this paper is a method of scanning by adding a line buffer in one scan, it is possible to scan even if only a part of the image is saved after processing one image. Compared to those written in software language, the execution time is shortened, the speed is very fast, and the error is relatively small.

Keywords

Acknowledgement

This paper was supported by the National University Development Project in 2020

References

  1. Seung Seob Park and Byung-Gwon Cho, "Additional Write Voltage for Shortening Delay Time of Discharge in Plasma Display Pane", Journal of KIIT, Vol. 15, No. 8, pp. 27-32, Aug. 2017.
  2. Y. H. Kim , S. D. Choi , and H. S. Kang, "Development of Automatic Attachment Device for 3 Axis Control Module Replacement Type and Display Driver IC protection of Thin Film Metal Foil", Journal of the Korean Society of Manufacturing Process Engineers, Vol. 2019, No. 4, pp. 2-2, Apr. 2019.
  3. Shyh-Ming Chang, jwo-Huei Jou, Adam Hsieh, Tai-Honh Chen, Chin-Yun Chang, Yung-Hao Wang and Chun-Ming Huang, "Characteristic study of anisotropic-conductive film for chip-on-film packaging", Journal of Microelectronics Reliability, Vol. 41, No. 12, pp. 2001-2009, Dec. 2001. https://doi.org/10.1016/S0026-2714(01)00221-9
  4. Won Kim, "Design of Image Scanning System for Automatic Recognition of Barcode Information on Moving Parcels", The Journal of Korean Institute of Information Technology, Vol. 10, No. 10, pp. 63-68, Oct. 2012
  5. Chang-Dae Kim, Seo-Hyuk Choi, Sung-Pil Ryu, Dong-Woo Kim and Jae-Hyeong Ahn, "The Position Detection of Smartphone's Camera Using Adaptive Frequency Degree Test", The Journal of Korean Institute of Information Technology, Vol. 14, No. 10, pp. 105-112, Oct. 2016.
  6. Sung-Ho Shin and Yong-Jin Jeong, "UI Device for Smart TV using the Absolute Coordinates System Based on Camera", The Journal of Korean Institute of Information Technology, Vol. 11, No. 6, pp. 189-198, Jun. 2013.
  7. Jong-Ju Jeon, Sang-Ho Park, Young-In Kim and Il-Kyu Eom, "Copy-Rotate-Move Forged Region Detection Using Compensation of Coordinate Shift by Rotation", The Journal of Korean Institute of Information Technology, Vol. 13, No. 10, pp. 51-58, Oct. 2015.
  8. Minyoung Lee and Byeongro Min, "Algorithm for calculating the change in distance per camera center and pixel", Proceedings of KIIT Conference, Vol. 2020, No. 10, pp. 107-109, Oct. 2020.
  9. Hi-Seok Kim and Sea-Ho Kim, "FPGA Implementation of Stereoscopic Image Processing Architecture Base on the Gray-Scale Projection Algorithm", The Journal of Korean Institute of Information Technology, Vol. 11, No. 9, pp. 31-37, Sep. 2013.
  10. Tae-Wuk Bae, "High-Density Impulse Noise Removal Using Recursive Tri-lateral Weighted Median Filter", The Journal of Korean Institute of Information Technology, Vol. 13, No. 12, pp. 61-67, Dec. 2015.
  11. S.Y. Kwon, "Parallel Processing Hardware Accelerator for Detecting Shape of Hand", M.S. dissertation, Department of Electronic, Engineering, Kumoh National Institute of Technology, Gumi, Korea, 2018.
  12. Chan-Su Park and Hi-Seok Kim, " FPGA Implementation for Real Time Sobel Edge Detector Block Using 3-Line Buffers", The Journal of KIIT, Vol. 19, No. 1, pp. 10-17, Mar. 2015.
  13. Asis Nasipuri, Handi Alasti and Hojoon Kim, "Efficient Performance of a Robust Filter-based Approach for Contour Detection in Wireless Sensor Networks", The Journal of Korean Institute of Information Technology, Vol. 6, No. 5, pp. 88-98, Oct. 2008.
  14. Ji-Min Lee and Jong-An Park, "Feature Detection using the Rearrangement of ROI(Region of Interest)", The Journal of Korean Institute of Information Technology, Vol. 10, No. 8, pp. 145-152, Aug. 2012.
  15. Chang-Yong Lee, Young-Hyung Kim and Yong-Hwan Lee, "Optimized Hardware Design using Sobel and Median Filters for Lane Detection", The Journal advanced Information Technology and convergence, Vol. 9, No. 1, pp. 115-125, Jul. 2019. https://doi.org/10.14801/jaitc.2019.9.1.115