[특허]Touch screen systems and methods for sensing touch screen displacement

[미국특허] Touch screen systems and methods for sensing touch screen displacement 원문보기

IPC분류정보
국가/구분	United States(US) Patent 등록
국제특허분류(IPC7판)	G06F-003/042 G06F-003/041
출원번호	US-0041426 (2013-09-30)
등록번호	US-9619084 (2017-04-11)
발명자 / 주소	Deichmann, Oberon Denaci Miller, William James Nolan, Daniel Aloysius Yeary, Lucas Wayne
출원인 / 주소	Corning Incorporated
대리인 / 주소	Barron, Jason A.
인용정보	피인용 횟수 : 1 인용 특허 : 44

초록 ▼

A touch screen system configured to detect a displacement of a cover sheet when pressure or force is applied to the cover sheet upper surface. A light source and photodetector are configured to be in optical communication by reflection of light from the light source from the lower surface of the cover sheet. A displacement of the coversheet changes the amount of reflected light that falls upon the detector. The detector signal can be used to measure the amount of displacement, as well as the time-evolution of the displacement. The touch-screen system can be interfaced with a touch-sensitive display unit to form a display system having both pressure-sensing capability and touch-sensing capability.

대표청구항 ▼

1. A touch screen system for sensing a touch event, comprising: a cover screen having an upper surface, a lower surface and a perimeter;a support frame having a central aperture and stood off from the cover screen by at least one resilient stand-off member;a photodetector disposed adjacent the lower surface of and external to the cover screen,wherein the photodetector and the lower surface of the cover screen are separated by a distance δz and define a Fabry-Perot cavity that resides outside of the cover screen and that has a transmission defined by the distance δz;a light source that emits light and that is in optical communication with the photodetector via reflection off of a portion of the cover screen lower surface adjacent the perimeter and without the light or the reflected light traveling through or above the cover screen,such that when the cover screen a is displaced toward the support frame by compressing the at least one stand-off member, the amount of reflected light detected by the photodetector changes; andwherein the transmission of the Fabry-Perot cavity changes by changing the distance δz when the cover screen is displaced towards or away from the photodetector, thereby causing the change in the amount of light detected by the photodetector,wherein each light source and photodetector defines a sensor head,wherein the system includes multiple sensor heads operably arranged adjacent the cover sheet screen perimeter and adjacent the lower surface,with the multiple sensor heads operably connected to a microcontroller,wherein the signal output from the multiple sensor heads is exported to a computer and used to determine the position and associated force of the touch event,further comprising a capacitive or resistive based system to determine the position of two or more simultaneous touch events,wherein the signal output from the multiple sensor heads is exported to a computer and used to determine the associated force of the two or more simultaneous touch events. 2. The touch screen system of claim 1, further comprising a microcontroller operably connected to the light source and the photodetector and configured to receive a detector signal from the photodetector and determine from tile detector signal an amount of displacement of the cover screen. 3. The touch screen system of claim 1, further comprising a partially reflecting member disposed immediately adjacent the photodetector surface to further define the Fabry-Perot cavity. 4. The touch screen system of claim 1, further including a cover adjacent the perimeter and on at least one of the upper and lower surfaces, the cover being configured to block at least a visible wavelength of light. 5. The touch screen system of claim 1, wherein the portion of the cover screen lower surface adjacent the perimeter from which light from the laser reflects includes a reflection coating. 6. The touch screen system of claim 1, wherein the light from the light source has an infrared wavelength. 7. The touch screen system of claim 1, wherein the cover screen is transparent to a visible wavelength of light. 8. The touch screen system of claim 1, wherein the frame is configured to interface with a touch-sensitive display. 9. A display system, comprising: the touch-screen system according to claim 1; anda display unit having a display, with the touch-screen operably interfaced therewith. 10. The display system of claim 9, wherein the display unit includes one of capacitive and resistive touch-sensing capability.

이 특허에 인용된 특허 (44) 인용/피인용 타임라인 분석

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Garwin Richard L. (Scarsdale NY) Levine James L. (Yorktown Heights NY), Force sensing data input device responding to the release of pressure force.
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Pihlaja,Pekka, General purpose input board for a touch actuation.
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Fujioka Ichiro (922 Hachigasaki ; Matsudo-shi ; Chiba-ken JPX), Graphic pattern inputting apparatus.
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Kobachi Mitsuo,JPX ; Fujita Akihiro,JPX, Input device.
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Parks John R. (Ringwood GB2), Method and apparatus for capturing information in drawing or writing.
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Lu, Chih-Hung; Chen, Hui-Hsuan, Method for detecting users' pressing action and optical operating unit.
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Fleck, David; Yamamoto, Sadao, Method of triggering functions in a computer application using a digitizer having a stylus and a digitizer system.
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Klinghult, Gunnar, Methods of operating electronic devices including touch sensitive interfaces using force/deflection sensing and related devices and computer program products.
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Kim, Jin-Hwan; Hwang, Seong-Mo; Nam, Seung-Ho; Min, Jee-Hong; Hong, Won-Ki, Object-sensing device.
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Drumm, Owen, Optical coupler for use in an optical touch sensitive device.
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Yamamoto, Takumi, Optical sensor device, display apparatus, and method for driving optical sensor device.
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Holmgren, Stefan; Sparf, Lars; Behdasht, Remo; Eriksson, Thomas; Elyan, Michael Lawrence; Shain, Joseph; Jansson, Anders; Pettersson, Robert; Karlsson, John, Optical touch screen systems using total internal reflection.
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Yatsuda, Kazutoshi; Igusa, Masahiro; Fujii, Akira; Suzuki, Toshihiko; Shimizu, Keishi; Ohtsu, Shigemi, Optical waveguide, optical waveguide type touch panel and method of manufacturing the optical waveguide.
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Baur Peter F. (Augsburg DEX), Pen input to liquid crystal display.
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Eriksson, Thomas; Elyan, Michael Lawrence, Resilient light-based touch surface.
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Pance, Aleksandar; King, Nicholas Vincent; Kerr, Duncan; Bilbrey, Brett, Sensing capacitance changes of a housing of an electronic device.
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Lapstun, Paul; Silverbrook, Kia, Sensing device having force and orientation sensors.
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De Gotari Sergio Salinas,MXX, Substantially stationary pressure sensitive system for providing input to an electrical device, particularly a computer.
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Reimer, Ernest M.; Inkster, Robert, Switches and joysticks using a non-electrical deformable pressure sensor.
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Roberts,Jerry B., Tangential force control in a touch location device.
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Wilson, Geoffrey D.; Borgnis, Victor E.; Kent, Joel; Lewis, Mike; Loucks, Drew; Roney, James; Patti, Michael Bruno, Touch confirming touchscreen utilizing plural touch sensors.
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Saxena, Kuldeep Kumar; Tan, Wee Sin; Ng, Peng Yam; Yee, Pak Hong; Saravanan, Rani Ramamoorthy, Touch input system using light guides.
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Inkster, Robert D., Touch pad using a non-electrical deformable pressure sensor.
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Kasday Leonard R. (Plainsboro NJ), Touch position sensitive surface.
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Nho, Jeong-ho; Cha, Yong-dok, Touch sensing system and display apparatus employing the same.
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Han, Jefferson Y.; Kollin, Joel S.; Slobodin, David Elliott, Touch sensing with frustrated total internal reflection.
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Knight, III, Jack; Carlson, Andrew; Maynard, Joe, Unitary molded lens filter for touch screen interface.
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이 특허를 인용한 특허 (1) 인용/피인용 타임라인 분석

Zhang, Chunfang; Zou, Xiangxiang, Force touch display device and force touch control method.
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[미국특허] Touch screen systems and methods for sensing touch screen displacement 원문보기