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Infrared-transmitting backlight module

A backlight module and infrared-transmitting technology, applied in light guides, optics, optical components, etc., can solve problems such as poor effects

Inactive Publication Date: 2017-05-10
WUHAN YIWEIDENG TECH DEV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, since a heat sink with sufficient power cannot be installed on the desktop of the multi-touch panel, it cannot penetrate the LCD glass for touch capture, and can only use poor-effect projection for visual display.

Method used

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  • Infrared-transmitting backlight module

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Embodiment Construction

[0012] Below in conjunction with accompanying drawing and specific example, further illustrate the present invention, should be understood that these embodiments are only for illustrating the present invention and are not intended to limit the scope of the present invention, after having read the present invention, those skilled in the art will understand various aspects of the present invention All modifications of the valence form fall within the scope defined by the appended claims of the present application.

[0013] Such as figure 1 As shown, an infrared backlight module includes a backlight diffusion film 2 placed behind a liquid crystal glass 1, an elastic support body 3 is provided between the backlight diffusion film 2 and a light guide plate 5, and light sources are provided on both sides of the light guide plate 5 Generating devices, the other side of the light guide plate 5 opposite to the elastic support body 3 is provided with a reflective plate 6 .

[0014] Com...

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Abstract

The invention discloses a backlight module and a touch screen. The backlight module comprises a backlight diffusion film arranged behind liquid crystal glass, an elastic support is arranged between the backlight diffusion film and a light guide plate, light source generation devices are arranged on two sides of the light guide plate, and a reflecting plate is arranged on the other side face, opposite to the elastic support, of the light guide plate. The backlight module has the advantages that a distance between the light guide plate and the backlight diffusion film is extended to increase an average incidence angle that backlight enters the backlight diffusion film, and only the backlight diffusion film is used for diffusing backlight of the light guide plate, so that prisms are omitted, and sufficiently even backlight effects can be guaranteed when infrared rays are small in light attenuation.

Description

technical field [0001] The present invention relates to the field of multimedia touch technology, more specifically to an infrared-transmitting backlight module Background technique [0002] The traditional multi-touch panel technology uses several 850nmX50mw infrared inline laser heads as reference terminals, which are respectively fixed at the four corners of the screen. After the infrared straight-line laser head located at the four corners works, the infrared laser covers the entire screen. At this time, when an object is close to the screen, the infrared laser will be blocked by the object and reflected, and then form a bright spot. The infrared camera located in the screen captures the above-mentioned bright spots, and transmits the captured picture to the microprocessor for data analysis, so as to obtain the specific position of the object close to the screen, and then complete the follow-up interaction. [0003] The traditional multi-touch panel has a simple struct...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02F1/13357G02F1/1333G02B6/00G06F3/041G06F3/042
CPCG02B6/0051G02B6/0055G02B6/0088G02F1/13338G02F1/133606G02F1/133608G06F3/0412G06F3/0425
Inventor 余俊
Owner WUHAN YIWEIDENG TECH DEV