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Touch screen with optical signal receiver in front of touch panel

An optical signal and touch panel technology, applied in the input/output process of data processing, instruments, electrical digital data processing, etc., can solve the problems of limited application environment, affecting the compactness of the structure, and inconvenient to use the touch screen, so as to improve the system performance, the effect of improving touch accuracy

Active Publication Date: 2012-12-12
李兴文
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, because the infrared touch screen adds a frame to the ordinary screen, it affects the compactness of the structure, and the application environment is limited.
Moreover, the cost of the infrared touch screen is still relatively high, and it is not easy to apply to a touch screen above 30 inches

Method used

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  • Touch screen with optical signal receiver in front of touch panel
  • Touch screen with optical signal receiver in front of touch panel
  • Touch screen with optical signal receiver in front of touch panel

Examples

Experimental program
Comparison scheme
Effect test

specific Embodiment 1

[0083] refer to Figure 4 , at least four filter channels 131 are arranged in at least two rows in sequence, one end where the photosensitive element 15 is located is adjacent, and one end of the light entrance 132 is adjacent, so that the direction of the optical signal receiving area is consistent.

[0084] Wherein preferably, at least four light filtering channels 131 are arranged in a row in sequence, the end where the photosensitive element 15 is located is adjacent, and the end where the light entrance 132 is located is adjacent. A filter is provided on the light entrance 132 to filter out non-correlated light signals. At least four light entrances 132 of the optical signal receiving head 13 use the same optical filter to simplify the structure.

[0085] refer to Figure 5 , the optical signal receiving regions 21 corresponding to two adjacent light entrances 132 overlap, and the overlapping portions are shown as shaded parts in the figure.

[0086] When the photocont...

specific Embodiment 2

[0089] refer to Figure 6 , the light entrances of at least four filter channels 131 are strip-shaped, including longitudinal light entrances 1321 and transverse light entrances 1322 .

[0090] refer to Figure 7 , the vertical light entrance 1321 and the horizontal light entrance 1322 are interlaced in the length direction of the optical signal receiving area 21 formed on the touch panel 2 , and the intersecting places are indicated by hatching.

[0091] When the optical signal sent by the optical contact 3 is simultaneously received and recognized by the photosensitive elements 15 in at least two filter channels 131 corresponding to the optical signal receiving areas 211 interlaced in the length direction, the microprocessor system 11 receives the signal processing module 14 for processing According to the data of a photosensitive element, the optical contact 3 is located in the optical signal area corresponding to a photosensitive element, and the microprocessor system 11 ...

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Abstract

The invention relates to a touch screen, in particular to a touch screen with an optical signal receiver in front of a touch panel. The touch screen comprises the touch panel and a microprocessor system. The microprocessor system is connected with a touch position detection module used for detecting touch point positions. The touch position detection module comprises the optical signal receiver and a signal processing module. The optical signal receiver is provided with a photosensitive element connected with the signal processing module. The optical signal receiver comprises at least four filter passages. One end of each filter passage is provided with an optical inlet, and the other end of each filter passage is provided with one photosensitive element. The passage wall of each filter passage is capable of shading light. The optical signal receiver is disposed in front of the touch panel. The optical inlets of the filter passages of the optical signal receiver face the touch panel so that corresponding optical signal receiving areas are formed on the touch panel. The touch screen with the optical signal receiver in front of the touch panel is simple in structure and low in cost and requires few devices.

Description

technical field [0001] The invention relates to electronic equipment, in particular to a touch screen. Background technique [0002] With the development of multimedia technology, touch screens are more and more widely used as the most convenient, simple and natural input means, such as telecommunications bureaus, banks, information inquiries on urban streets, industrial control, multimedia teaching, etc. With this technology, the user can operate as long as he gently touches the graphics and text on the display screen with his finger or other touch parts, which makes the human-computer interaction more intuitive and greatly facilitates the user. [0003] There are many types of existing touch screens. Compared with other touch screens, infrared touch screens have the advantages of not being disturbed by current, voltage and static electricity, and suitable for some harsh environmental conditions. Almost with an overwhelming advantage, it gradually occupied the market of ot...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F3/042
CPCG06F3/0421G06F3/0428
Inventor 孙倩倩
Owner 李兴文