CN103383610A - Liquid crystal display multi-touch method - Google Patents
Liquid crystal display multi-touch method Download PDFInfo
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- CN103383610A CN103383610A CN2012101313447A CN201210131344A CN103383610A CN 103383610 A CN103383610 A CN 103383610A CN 2012101313447 A CN2012101313447 A CN 2012101313447A CN 201210131344 A CN201210131344 A CN 201210131344A CN 103383610 A CN103383610 A CN 103383610A
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Abstract
The invention provides an LCD (Liquid Crystal Display) multi-touch method for realizing touch point tracing by utilizing a total internal reflection technology principle, which comprises the following steps: (1) a finger or a touch pen presses on a transparent medium capable of forming total reflection by 850 nm infrared light; (2) the total reflection of the transparent medium is broken, and a press point is formed into an infrared light reflection point; (3) the infrared light reflection point is caught by an infrared camera at the back of the LCD; (4) tracking data and tracing events are outputted after the calculation by a tracing module according to the inputted camera video streaming; (5) an application program is driven by a driver module according to the tracking data and the tracing events. The LCD multi-touch method utilizes the total internal reflection technology principle to realize the touch point tracing for the first time, then utilizes the tracing technology to realize the optics-based multi-point touch, and opens a new way for realizing the multi-point touch by the LCD.
Description
Technical field
The present invention relates to a kind of liquid crystal display touch method, especially a kind of liquid crystal display multi-point touch method.
Background technology
Multiple point touching refers to and allows the computer user to control simultaneously a kind of operator scheme of computing machine by a plurality of fingers or contact, and multiple point touching equipment is by tangible demonstration or shadow curtain equipment (as graphoscope, desktop, wall), also can be formed by touch pad, identify the point of finding simultaneously the touch behavior and process by software afterwards.
Summary of the invention
The invention provides a kind of know-why of total internal reflection of utilizing and realize the liquid crystal display multi-point touch method that follow the trail of the contact.
Realize the liquid crystal display multi-point touch method of the object of the invention, comprise the steps:
(1) finger or felt pen are by the transparent medium that has the 850nm infrared light to form total reflection at;
(2) total reflection of transparent medium is destroyed, and press points forms the infrared light reflection point;
(3) infrared camera that is placed in after the LCD liquid crystal display captures the infrared light reflection point;
(4) tracing module is according to the camera video stream of input, output trace data and track of events after calculating;
(5) driver module is according to data and the event-driven application program of following the trail of.
Described liquid crystal display multi-point touch method also comprises a calibration steps: a built-in calibration module, can calibration camera and projector, and allow the contact in correct location triggered.
The beneficial effect of liquid crystal display multi-point touch method of the present invention is as follows:
Liquid crystal display multi-point touch method of the present invention utilizes the know-why of total internal reflection to realize the contact tracking first, then utilizes the tracer technique realization based on the multiple point touching of optics, realizes multiple point touching for liquid crystal display and has opened up a new way.
Description of drawings
Fig. 1 is the process flow diagram of liquid crystal display multi-point touch method of the present invention.
Embodiment
As shown in Figure 1, liquid crystal display multi-point touch method of the present invention comprises the steps:
(1) finger or felt pen are by the transparent medium that has the 850nm infrared light to form total reflection at;
(2) total reflection of transparent medium is destroyed, and press points forms the infrared light reflection point;
(3) infrared camera that is placed in after the LCD liquid crystal display captures the infrared light reflection point;
(4) tracing module is according to the camera video stream of input, output trace data and track of events after calculating;
(5) driver module is according to data and the event-driven application program of following the trail of.
Described liquid crystal display multi-point touch method also comprises a calibration steps: a built-in calibration module, can calibration camera and projector, and allow the contact in correct location triggered.
The principle of work of liquid crystal display multi-point touch method of the present invention is as follows:
Total internal reflection is a kind of optical phenomena.During through the medium of two different refractivities, the light of part can be refracted in the interface of medium when light, and remaining is reflected.But when incident angle is larger than critical angle (light is away from normal), light can stop entering another interface, otherwise can all reflect to inner face.
Total reflection is relevant with incident angle and medium, and medium is most important, and transparent medium can produce total reflection, is the acrylic that thickness surpasses 8mm.Four limit polishings with acrylic can guarantee that infrared optical energy irradiation advances acrylic, can guarantee again in the inner formation of acrylic total reflection.
When finger presses during acrylic surperficial, the total reflection meeting of acrylic inside is destroyed, and press points can form the infrared light reflective spot, and the infrared camera that is placed in this moment below transparent medium just can capture this reflective spot, thereby realizes the contact tracking.
Embodiment recited above is described the preferred embodiment of the present invention; be not that scope of the present invention is limited; design under spiritual prerequisite not breaking away from the present invention; various distortion and improvement that the common engineering technical personnel in this area make technical solution of the present invention all should fall in the definite protection domain of claims of the present invention.
Claims (2)
1. a liquid crystal display multi-point touch method, comprise the steps:
(1) finger or felt pen are by the transparent medium that has the 850nm infrared light to form total reflection at;
(2) total reflection of transparent medium is destroyed, and press points forms the infrared light reflection point;
(3) infrared camera that is placed in after the LCD liquid crystal display captures the infrared light reflection point;
(4) tracing module is according to the camera video stream of input, output trace data and track of events after calculating;
(5) driver module is according to data and the event-driven application program of following the trail of.
2. liquid crystal display multi-point touch method according to claim 1 is characterized in that: also comprise a calibration steps: a built-in calibration module, can calibration camera and projector, and allow the contact in correct location triggered.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012101313447A CN103383610A (en) | 2012-05-02 | 2012-05-02 | Liquid crystal display multi-touch method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012101313447A CN103383610A (en) | 2012-05-02 | 2012-05-02 | Liquid crystal display multi-touch method |
Publications (1)
| Publication Number | Publication Date |
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| CN103383610A true CN103383610A (en) | 2013-11-06 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
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| CN2012101313447A Pending CN103383610A (en) | 2012-05-02 | 2012-05-02 | Liquid crystal display multi-touch method |
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| CN (1) | CN103383610A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI717335B (en) * | 2015-07-31 | 2021-02-01 | 韓商愛思開海力士有限公司 | Data storage device |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20060227120A1 (en) * | 2005-03-28 | 2006-10-12 | Adam Eikman | Photonic touch screen apparatus and method of use |
| CN101231450A (en) * | 2008-02-25 | 2008-07-30 | 陈伟山 | Multipoint and object touch panel arrangement as well as multipoint touch orientation method |
| US20090128499A1 (en) * | 2007-11-15 | 2009-05-21 | Microsoft Corporation | Fingertip Detection for Camera Based Multi-Touch Systems |
| CN201322920Y (en) * | 2008-11-26 | 2009-10-07 | 陈伟山 | Simple large screen multipoint touch positioner |
| CN101821703A (en) * | 2007-08-03 | 2010-09-01 | 感知像素股份有限公司 | Multi-touch sensing through frustrated total internal reflection |
| CN201886453U (en) * | 2011-02-14 | 2011-06-29 | 苏州创捷传媒展览有限公司 | Frustrated total internal reflection multi-touch device |
| CN102144208A (en) * | 2008-07-07 | 2011-08-03 | 北方电讯网络有限公司 | Multi-touch touchscreen incorporating pen tracking |
-
2012
- 2012-05-02 CN CN2012101313447A patent/CN103383610A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20060227120A1 (en) * | 2005-03-28 | 2006-10-12 | Adam Eikman | Photonic touch screen apparatus and method of use |
| CN101821703A (en) * | 2007-08-03 | 2010-09-01 | 感知像素股份有限公司 | Multi-touch sensing through frustrated total internal reflection |
| US20090128499A1 (en) * | 2007-11-15 | 2009-05-21 | Microsoft Corporation | Fingertip Detection for Camera Based Multi-Touch Systems |
| CN101231450A (en) * | 2008-02-25 | 2008-07-30 | 陈伟山 | Multipoint and object touch panel arrangement as well as multipoint touch orientation method |
| CN102144208A (en) * | 2008-07-07 | 2011-08-03 | 北方电讯网络有限公司 | Multi-touch touchscreen incorporating pen tracking |
| CN201322920Y (en) * | 2008-11-26 | 2009-10-07 | 陈伟山 | Simple large screen multipoint touch positioner |
| CN201886453U (en) * | 2011-02-14 | 2011-06-29 | 苏州创捷传媒展览有限公司 | Frustrated total internal reflection multi-touch device |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI717335B (en) * | 2015-07-31 | 2021-02-01 | 韓商愛思開海力士有限公司 | Data storage device |
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Application publication date: 20131106 |