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Ȩ Ȩ > ¿¬±¸¹®Çå > ±¹³» ³í¹®Áö > Çѱ¹Á¤º¸Åë½ÅÇÐȸ ³í¹®Áö (Journal of the Korea Institute of Information and Communication Engineering)

Çѱ¹Á¤º¸Åë½ÅÇÐȸ ³í¹®Áö (Journal of the Korea Institute of Information and Communication Engineering)

Current Result Document :

ÇѱÛÁ¦¸ñ(Korean Title) ´ëÇü ÅÍÄ¡½ºÅ©¸°ÀÇ °í¼Ó°¨Áö¸¦ À§ÇÑ ÁÖÆļöºÐÇÒ µ¿½Ã¼¾½Ì ±â¹ý
¿µ¹®Á¦¸ñ(English Title) Frequency Division Concurrent Sensing Method for High-Speed Detection of Large Touch Screens
ÀúÀÚ(Author) Àå¿î¿ë   ±èÇü¿ø   Un-yong Jang   HyungWon Kim  
¿ø¹®¼ö·Ïó(Citation) VOL 19 NO. 04 PP. 0895 ~ 0902 (2015. 04)
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(Korean Abstract)
º» ³í¹®Àº ´ëÇü ÅÍÄ¡½ºÅ©¸°À» À§ÇÑ °í¼Ó ÅÍÄ¡°¨Áö ¹× ³ëÀÌÁî Á¦°Å¸¦ À§ÇÑ FDCS (Frequency division concurrent sensing) ±â¹ýÀ» Á¦¾ÈÇÑ´Ù. ±âÁ¸ÀÇ ÅÍÄ¡½ºÅ©¸° °¨Áö¹æ½ÄÀº ´ëºÎºÐ ±¸µ¿½ÅÈ£¸¦ ¼øÂ÷ÀûÀ¸·Î Àΰ¡ÇÏ°í ¼øÂ÷ÀûÀ¸·Î ¼¾½Ì½ÅÈ£¸¦ ºÐ¼®Çϱ⠶§¹®¿¡ °¨Áö¼Óµµ°¡ ÅÍÄ¡½ºÅ©¸° Å©±â¿¡ µû¶ó ±Þ°ÝÈ÷ °¨¼ÒÇÏ¿© ´ëÇüÅÍÄ¡½ºÅ©¸°¿¡ Àû¿ëÇϱ⠾î·Á¿î ¹®Á¦Á¡ÀÌ ÀÖ´Ù. Á¦¾ÈµÈ ±â¹ýÀº ¸ðµç µå¶óÀ̺ê¶óÀο¡ ¼­·Î ´Ù¸¥ ÁÖÆļöÀÇ ½ÅÈ£¸¦ µ¿½Ã¿¡ Àΰ¡ÇÏ°í °¢ ¼¾½º ¶óÀÎÀÇ ½ÅÈ£¸¦ ÁÖÆļö ¿µ¿ª¿¡¼­ ºÐ¼®ÇÏ´Â ±â¹ýÀ¸·Î ´ëÇü½ºÅ©¸°¿¡¼­µµ °í¼ÓÀÇ °¨Áö¼Óµµ¸¦ Á¦°øÇÑ´Ù. ¶ÇÇÑ ÁÖÆļö¿µ¿ª¿¡¼­ ³ëÀÌÁî ÇÊÅ͸µ±â¹ýÀ» Á¦¾ÈÇÏ¿© ÅÍÄ¡°¨Áö½ÅÈ£´Â ´©ÀûÇÏ°í ³ëÀÌÁî´Â »ó¼âÇϸç, ÅÍÄ¡½ºÅ©¸°ÀÇ ÁÖÆļöÀü´ÞÇÔ¼öÀÇ ¿ªÀÇ Æ¯¼ºÀ» °¡Áö´Â pre-distortion equalizer¸¦ Àû¿ëÇÏ¿© ÅÍÄ¡°¨µµ SNRÀ» ´õ¿í °³¼±ÇÑ´Ù. 23¡È ´ëÇü ÅÍÄ¡½ºÅ©¸° ¸ðµ¨¿¡ ½ÇÁ¦ÀÇ È¯°æ ³ëÀÌÁ Àû¿ëÇÏ¿© ½ÇÇèÇÑ °á°ú º» Á¦¾È±â¼úÀÌ ±âÁ¸ ±â¹ý ´ëºñ frame scan rateÀ» 274%, SNRÀ» 43dB Áõ°¡½ÃÅ´À» º¸ÀδÙ.
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(English Abstract)
This paper presents a high-speed sensing and noise cancellation technique for large touch screens, which is called FDCS (Frequency Division Concurrent Sensing). Most conventional touch screen detection methods apply excitation pulses sequentially and analyze the sensing signals sequentially, and so are often unacceptably slow for large touch screens. The proposed technique applies sinusoidal signals of orthogonal frequencies simultaneously to all drive lines, and analyzes the signals from each sense line in frequency domain. Its parallel driving allows high speed detection even for a very large touch screens. It enhances the sensing SNR (Signal to Noise Ratio) by introducing a frequency domain noise filtering scheme. We also propose a pre-distortion equalizer, which compensates the drive signals using the inverse transfer function of touch screen panel to further enhance the sensing SNR. Experimental results with a 23¡± large touch screen show that the proposed technique enhances the frame scan rate by 273% and an SNR by 43dB compared with a conventional scheme.
Å°¿öµå(Keyword) ´ëÇü ÅÍÄ¡½ºÅ©¸° ÄÁÆ®·Ñ·¯   Á÷±³ ÁÖÆļö ºÐÇÒ   ³ëÀÌÁîÁ¦°Å   Large touch screen controller   Orthogonal frequency division   Noise Cancellation   Pre-distortion equalizer  
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