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Optical fiber imaging touch screen

A touch screen, optical fiber technology, applied in instruments, computer parts, graphics reading and other directions, can solve the problems of low reliability, high use environment requirements, easy to be exposed to sunlight, etc., to improve reliability, eliminate the interference of ambient light, Reduce the effect of electronic components

Inactive Publication Date: 2005-03-02
邢休东 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] Existing types of touch screens have their limitations, and they have the following disadvantages: 1. The conductive film of the resistive touch screen is easily damaged, and its anti-violence performance is poor, so it is not suitable for use in public places; 2. Surface dirt such as water and dust will absorb Surface acoustic wave and surface acoustic wave touch screens have high environmental requirements, cannot be used outdoors, and need to be cleaned regularly; 3. Infrared touch screens require more electronic components, and are susceptible to interference from sunlight, etc., and have low reliability; 4. The stability of the capacitive touch screen is poor, and it will drift
The above-mentioned shortcoming of existing touch screen product has limited the use promotion of product

Method used

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  • Optical fiber imaging touch screen

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] Example 1: image 3 , the screen body is cut into the shape shown in the figure, and the optical fiber 1 is evenly installed on the screen body at the position shown in the figure, and arranged accordingly as shown in the figure figure 1 The one-dimensional imaging fiber bundle 2, the control box 4 controls the light source 6 to emit light through the light source control cable 5, the optical fiber 1 leads the light, and the image formed in the imaging fiber bundle 2 is converted into an image signal by the CCD line array imaging element 3 and sent to the control box 4. When the user touches the point 7 on the screen body, the light received by the optical fiber 1 at the corresponding position changes in brightness and darkness, and the image formed by the one-dimensional imaging optical fiber bundle 2 also changes accordingly. and the change of the image signal after the touch, the user's touch position can be accurately obtained.

Embodiment 2

[0019] Example 2: Figure 4 , the screen body is cut into the shape shown in the figure, and the optical fiber 9 is evenly installed on the screen body at the position shown in the figure, and arranged accordingly as shown in the figure figure 2 The two-dimensional imaging fiber bundle 10, the control box 12 controls the light source 14 to emit light through the light source control cable 13, the optical fiber 9 leads the light, and the image formed in the two-dimensional imaging fiber bundle 10 is converted into an image signal by the CMOS area array imaging element 11 and sent to Control box 12; when the user touches a point 15 on the screen body, the light received by the optical fiber 9 at the corresponding position changes in brightness and darkness, and the image formed by the two-dimensional imaging fiber bundle 10 also changes accordingly. The control box 12 analyzes the The user's touch position can be accurately obtained by the change of the image signal before and ...

Embodiment 3

[0020] Example 3: Figure 5 In the process, the screen body is cut into the shape shown in the figure, and the imaging fiber 17 and the splitting fiber 22 are evenly installed around the screen body, and the imaging fiber 17 is composed as follows: figure 1 The imaging fiber optic bundle 18, the control box 19 controls the laser diode 21 to emit light through the control / signal cable 20, and the light guide is divided by the splitting fiber 22 to the surface of the screen body 24, corresponding to the imaging fiber 17, forming an image on the imaging fiber bundle 18 , the formed image is converted into an image signal by the imaging element 25 and sent to the control box 19; when the user touches the point 23 on the screen body, the light received by the imaging optical fiber 17 at the corresponding position changes in brightness and darkness, and the imaging optical fiber bundle 18 forms The image of the user also changes accordingly, and the control box 19 can accurately obt...

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PUM

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Abstract

The invention discloses a fiber image contact screen using fiber light guidance performance. It uses the light guidance performance of fiber, assembles the light emitted from the light source onto an imaging element and forms a one-dimension or two-dimension images through imaging fiber beam along X direction and Y direction assembled on the contact screen, when contact occurs, part of light is shaded, and generates change of bright and dark, the image formed by imaging fiber beam is changed correspondently, the localization detection can be accomplished through analyzing the image signal transmitted by imaging element before contact and after contact with the controller.

Description

technical field [0001] The present invention relates to a computer input device, and more particularly, it relates to a fiber optic imaging touch screen. Background technique [0002] Currently known touch screens include resistive touch screens, capacitive touch screens, surface acoustic wave touch screens and infrared touch screens. [0003] The technical principle of the resistive touch screen is: the screen body of the resistive touch screen is composed of multi-layer conductive composite films, and each conductive layer is separated by many small transparent isolation points. When a finger touches the screen, a contact point appears between the two conductive layers, and the controller detects After the contact, perform A / D conversion to obtain the coordinates of the touch point. Resistive touch screens are unaffected by dust, water, and dirt. The conductive coating of the resistive touch screen is relatively thin and easy to break. If it is too thick, it will reduce ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
Inventor 邢休东李瑞良
Owner 邢休东