CN202661665U

CN202661665U - Infrared light guide screen

Info

Publication number: CN202661665U
Application number: CN 201220348312
Authority: CN
Inventors: 任沙浦
Original assignee: University of Shaoxing
Current assignee: University of Shaoxing
Priority date: 2012-07-18
Filing date: 2012-07-18
Publication date: 2013-01-09
Anticipated expiration: 2022-07-18

Abstract

The utility model discloses an infrared light guide screen, which belongs to the field of optical devices. Four edges around the infrared light guide screen comprise a plurality of parabolic surfaces of constant size respectively, wherein an included angle of each parabolic surface and the lower surface of the light guide screen is 45 degrees; and the cross section along the horizontal direction of each parabolic surface is parabolic. When the infrared light guide screen is used for light transmission, light is emitted to the parabolic surfaces of the light guide screen by infrared emitting tubes which are arranged on focuses of the parabolic surfaces of the light guide screen, and the emitted light is fully reflected through the parabolic surfaces, and then reaches the parabolic surfaces on the opposite side of the light guide screen, is then fully reflected and then is focused to infrared receivers. Compared with the prior art in which only the light perpendicular to the light guide screen can be transmitted to the infrared receiver, the light guide screen has the advantages that not only the light perpendicular to the light guide screen but also the light tilting to the light guide screen can be transmitted to the infrared receiver, so that the light guide screen can be made extremely thin without affecting the signal strength of the light guide screen.

Description

A kind of infrared leaded light screen

Technical field

The utility model relates to a kind of infrared leaded light screen, belongs to the optical device field.

Background technology

In the prior art, the infrared light reflection face of infrared leaded light screen four edges is generally the plane, be US8 such as the patent No., 068, " ON A SUBSTRATE FORMED OR RESTING DISPLAYARRANGEMENT " is described for the patent of 101 B2, the infrared light reflection face of its leaded light screen is the plane horizontal by 45° angle, and there is following shortcoming in such reflecting surface:

1. the leaded light screen can only will be transferred to the receiving end of opposite side after 45 ° of reflecting surface reflections perpendicular to the light of leaded light screen, in order to strengthen as far as possible the reflection ray of infrared light, need to enlarge light path, namely increase the thickness of leaded light screen, so both increase the material cost of leaded light screen, and increased the weight of supporting product (such as mobile phone, computer etc.);

2. if for attractive in appearance, economical and reduce the thickness of leaded light screen, the light path of its Infrared transmission will narrow down, thereby causes a little less than the light, is subject to external interference, affects the signal of receiving terminal.

In view of this, the inventor studies this, develops a kind of infrared leaded light screen, and this case produces thus.

The utility model content

The purpose of this utility model provides the strong infrared leaded light screen of a kind of thin thickness, light transmission signal.

To achieve these goals, solution of the present utility model is as follows:

A kind of infrared leaded light screen, four edges respectively comprises several parabolas of the same size around it, and described parabola and leaded light screen lower surface angle are 45 °, and parabolic horizontal direction xsect is parabola shaped.

When above-mentioned infrared leaded light screen carries out the infrared light transmission, be installed in leaded light and shield the parabola that the infrared transmitting tube on the paraboloidal focus shields light directive leaded light, emission of light focuses on after the total reflection and arrives infrared remote receiver through arriving the parabola of leaded light screen opposite side after the parabolic total reflection.With can only compare to infrared remote receiver perpendicular to the light transmission of leaded light screen in the prior art, leaded light screen described in the utility model can not only will shield perpendicular to leaded light, and the light transmission that can will favour the conduit screen arrives infrared remote receiver, therefore the leaded light screen can be accomplished very thinly, and not affect its signal intensity.

Below in conjunction with drawings and the specific embodiments the utility model is done and to be described in further detail.

Figure of description

Fig. 1 is the infrared leaded light screen stereographic map of the present embodiment;

Fig. 2 is the infrared leaded light screen light transmission cross-sectional view of the present embodiment;

Fig. 3 is that the infrared leaded light of the present embodiment shields wherein part light path vertical view.

Label declaration:

Leaded light screen 1; Parabolic 11; Lower surface 12;

Circuit board 2; Infrared transmitting tube 3; Infrared remote receiver 4.

Embodiment :

As shown in Figure 1, a kind of infrared leaded light screen 1, four edges comprises that respectively several are of the same size parabolic 11 around it, and it is 45 ° that described parabola shields lower surface 12 angles with leaded light, and parabolic 11 horizontal direction xsects are parabola shaped.

As shown in Figures 2 and 3, when above-mentioned infrared leaded light screen 1 is applied on the corollary apparatus (such as infrared touch panel), being installed in infrared transmitting tube 3 on the circuit board 2 and infrared remote receiver 4 all is positioned on the focus that described leaded light shields 1 parabola 11, infrared transmitting tube 3 is with the parabola 11 of light directive leaded light screen 1, emission of light arrives infrared remote receiver 4 again through arriving the parabola 11 of opposite side after parabolic 11 total reflections after the total reflection.

Because infrared transmitting tube 3 and infrared remote receiver 4 all are positioned on the focus that leaded light shields 1 parabola 11, all of infrared transmitting tube 3 emission can be arrived parabolic 33 light all the infrared leaded light of horizontal sheaf shield the parabola 11 of 1 opposite side, and all light that the parabola 11 of opposite side will receive all gather in the infrared remote receiver 4.With the light transmission of shielding 1 perpendicular to leaded light can only be compared to infrared remote receiver 4 in the prior art, the utility model can not only will shield 1 perpendicular to leaded light, and the light transmission that can will favour conduit screen 1 arrives infrared remote receiver 4, therefore leaded light can be shielded 1 and accomplish very thinly, and not affect its signal intensity.

Leaded light described in the utility model screen can be applied in the multiple device that needs leaded light and optically focused, such as infrared touch panel.

Above-described embodiment and non-limiting product form of the present utility model and style, any person of an ordinary skill in the technical field all should be considered as not breaking away from patent category of the present utility model to its suitable variation or modification of doing.

Claims

1. one kind infrared leaded light shields, and it is characterized in that: four edges respectively comprises several parabolas of the same size around the described infrared leaded light screen, and described parabola and leaded light screen lower surface angle are 45 °, and parabolic horizontal direction xsect is parabola shaped.