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Optical touch screen, optical touch screen light source and touch pen

An optical touch screen, touch pen technology, applied in the direction of instrument, electrical digital data processing, data processing input/output process, etc., can solve the problems of inconvenient remote control, poor anti-interference ability, low resolution, etc.

Active Publication Date: 2010-01-20
李甲明
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

People cannot get the feeling and convenience of original writing through the touch screen
The existing touch screens still have disadvantages such as poor anti-interference ability, low resolution, and inconvenient remote control.

Method used

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  • Optical touch screen, optical touch screen light source and touch pen
  • Optical touch screen, optical touch screen light source and touch pen
  • Optical touch screen, optical touch screen light source and touch pen

Examples

Experimental program
Comparison scheme
Effect test

specific Embodiment 1

[0103] Specific embodiment one, take the light-transmitting protective plate in front of the screen as the touch panel:

[0104] The following content focuses on the case where the photosensitive element group is not provided with a converging lens. For the case of replacing it with a photosensitive element group provided with a converging lens, it has already been described above, and will not be explained in detail.

[0105] The photosensitive element group is arranged around the touchpad. Around the touchpad, including the front, rear, and sides along the sides of the touchpad. Specifically, refer to Figure 5 A photosensitive element group 502 composed of a row of photosensitive elements arranged horizontally is arranged on the top of the touch panel 501 , and a photosensitive element group 503 composed of a row of photosensitive elements arranged vertically is arranged on the left side. The photosensitive element group 502 and the photosensitive element group 503 can b...

specific Embodiment 2

[0148] Specific embodiment two, take the screen of rear projection type display as touchpad:

[0149] refer to Figure 1 to Figure 9 In the optical touch screen, the screen of the rear projection display is used as the touch panel 501 and the protective plate is used as the touch panel 501, and the structure and principle are basically the same.

[0150] One of the differences is that if the screen of the rear-projection display is not a transparent medium, the light cannot be transmitted in an orderly manner inside the screen of the rear-projection display, so it is not convenient to operate with non-luminous touch elements.

[0151] The second difference is that the screen of the rear-projection display is generally large, and further design is required to ensure that the light signal emitted from the light spot can be received smoothly.

[0152] The screen of the existing large-screen rear projection display is generally formed by splicing a plurality of small screens. re...

specific Embodiment 3

[0154] Specific embodiment three, take liquid crystal display screen or cathode display tube display (CRT) screen as touch panel:

[0155] refer to Figure 1 to Figure 9 ,as well as Figure 11 with Figure 12 , the optical touch screen uses the liquid crystal display screen as the touch panel 501 or the cathode display tube display (CRT) screen as the touch panel 501, and uses the protective plate as the touch panel 501. The structure and principle are basically the same.

[0156] The difference: The difference between the LCD screen and the cathode display tube display (CRT) screen relative to the protective plate is that the light transmission between the front and rear sides of the LCD screen and the cathode display tube display (CRT) screen is not good. That is, light does not easily penetrate liquid crystal display screens and cathode display tube display (CRT) screens. The photosensitive element group 502 and the photosensitive element group 503 are suitably arranged ...

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Abstract

The invention relates to the field of touch screens, in particular to an optical touch screen which comprises a touch pad, a single processing system and a photosensitive element group, wherein the photosensitive element group comprises a plurality of photosensitive elements which are connected with the single processing system. An optical touch screen light source comprises a light source, lightgenerated by the light source radiates more uniformly on the touch pad and transmits towards the outside of the touch pad, wherein transparent media are arranged on the outer surface of the touch pad. The invention also provides a contact touch pen which comprises a switch and a light emitting element, wherein the switch controls the light emitting situation of the light emitting element. The invention provides a remote touch pen as well, and the remote touch pen comprises a laser device, a power supply and a shell convenient for hand holding, wherein the laser device and the power supply arearranged in the shell, a switch is arranged between the laser device and the power supply and is arranged on the shell. The invention has strong anti-interference capability, resists greasy dirt and is applicable to occasions full of greasy dirty, such as factories, workshops, mine concessions and the like. Switching between remote touch mode and contact touch mode can be realized easily.

Description

technical field [0001] The invention relates to the field of touch screens, in particular to an optical touch screen. Background technique [0002] Existing touch screens made of optical properties mainly contain two types, one is an infrared touch screen; the other is a touch screen called a laser electronic whiteboard, which is mainly used in projectors, and uses laser tracking technology to scan the surface and touch handwriting. [0003] Existing infrared touch screens include through-beam infrared touch screens and infrared touch screens with optical receiving elements on the back. Compared with other touch screens, infrared touch screen has a series of advantages such as stable performance, strong anti-interference ability, long life and high precision. Almost with an overwhelming advantage, it gradually occupied the market of other touch screens. [0004] But the infrared touch screen still has a fatal weakness that is difficult to overcome, that is, the infrared wi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F3/042G06F3/033G06F3/0354
Inventor 李兴文孙倩倩邢明阳孙丽伟李兴武汪红牛余峰台小丽
Owner 李甲明
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