CN210514678U - Light guide strip and touch display device - Google Patents
Light guide strip and touch display device Download PDFInfo
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- CN210514678U CN210514678U CN201921547208.XU CN201921547208U CN210514678U CN 210514678 U CN210514678 U CN 210514678U CN 201921547208 U CN201921547208 U CN 201921547208U CN 210514678 U CN210514678 U CN 210514678U
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- refraction
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
- G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
- G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
- G06F3/042—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by opto-electronic means
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- General Engineering & Computer Science (AREA)
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- Planar Illumination Modules (AREA)
Abstract
The utility model discloses a leaded light strip and touch display device, the leaded light strip has first refracting surface, the second refracting surface, third refracting surface and fourth refracting surface, second refracting surface and third refracting surface are located between first refracting surface and the fourth refracting surface, the nodical first side that is located of first refracting surface or its extension line and second refracting surface or its extension line, third refracting surface or its extension line and fourth refracting surface or its extension line intersect is located the second side, the line of the mid point of first refracting surface and the mid point of fourth refracting surface is the datum line, first side, the second side is located the opposite both sides of datum line respectively. The utility model discloses a leaded light strip has changed the orbit of light, makes touch display device's infrared lamp still can satisfy the touch and write the requirement of height apart from the lower condition of glass screen surface distance to can reduce the height of the frame of installation infrared lamp.
Description
Technical Field
The utility model relates to a display device field, more specifically the leaded light strip and touch display device that says so.
Background
The infrared touch display device is a touch device which detects and locates a touch operation by using an X, Y-direction densely-distributed infrared matrix. In the existing touch display equipment, infrared light emitted by an infrared lamp generally passes through a light guide strip and is positioned on the front side of a glass screen, the height of the infrared light from the surface of the glass screen is basically unchanged after the infrared light passes through the light guide strip, in order to enable the height of the infrared light after passing through the light guide strip to meet the writing height on the glass screen, the distance from the center line of a lamp bead of the infrared lamp to the surface of the glass screen is generally higher, and in the process of implementing the invention, an inventor finds that the distance from the center line of the lamp bead to the surface of the glass screen is higher in the prior art, so that the height from a frame for installing the infrared lamp to the surface.
Disclosure of Invention
An object of the utility model is to provide a leaded light strip and touch display device, this leaded light strip has changed the orbit of light, makes touch display device's infrared lamp still can satisfy the touch and write the requirement of height apart from the lower condition of glass screen surface distance to can reduce the height of the frame of installation infrared lamp.
The technical scheme is as follows:
the utility model discloses a leaded light strip.
The light guide strip has first refracting surface, second refracting surface, third refracting surface and fourth refracting surface, second refracting surface and third refracting surface are located between first refracting surface and the fourth refracting surface, first refracting surface or its extension line with the intersection point of second refracting surface or its extension line is located first side, third refracting surface or its extension line with the intersection point of fourth refracting surface or its extension line is located the second side to the midpoint of first refracting surface with the line of the midpoint of fourth refracting surface is the datum line, first side the second side is located respectively the opposite both sides of datum line.
The first side is located at a rear side of the datum line and the second side is located at a front side of the datum line.
The included angle that first refracting surface or its extension line and second refracting surface or its extension line formed after crossing is α, third refracting surface or its extension line with fourth refracting surface or its extension line form after crossing is β, contained angle α with the angular difference of contained angle β is 0 degree to 20 degrees.
The included angle α is equal to the included angle β.
The light guide strip is further provided with a first mounting surface and a second mounting surface, and the first mounting surface and the second mounting surface are respectively located on two sides of the datum line.
The first refraction surface is intersected with the first installation surface, and an included angle between the first refraction surface and an extension line of the first installation surface is smaller than 90 degrees.
And the included angle between the extension lines of the first refraction surface and the first installation surface is 30-60 degrees.
The fourth refraction surface is intersected with the first installation surface, and an included angle between the fourth refraction surface and the first installation surface ranges from 70 degrees to 90 degrees.
The first refraction surface, the first installation surface, the fourth refraction surface and the second installation surface are sequentially connected to form an annular structure.
The utility model discloses still disclose a touch display device.
Touch display device, including display module assembly, glass screen, frame, infrared lamp and as above arbitrary the leaded light strip, the display module assembly reaches the glass screen install in on the frame, the display module assembly is located the rear side of glass screen, the infrared lamp is fixed in on the frame, and be located the front side of a side of glass screen, the leaded light strip is fixed in on the frame, the leaded light strip is located on the light transmission passageway of infrared lamp, first refraction face is close to the infrared lamp.
The light guide strip is provided with a fixing groove, the frame is provided with a protruding part, the protruding part is matched with the fixing groove, and the light guide strip passes through the fixing groove and the protruding part is fixed with the frame.
The light guide strip is abutted against the glass screen.
The frame has first side and second side at least, first side with the second side is relative, first side reaches all be equipped with infrared lamp and leaded light strip on the second side, first side with the infrared lamp of second side is corresponding, first side with the infrared lamp of one of them side of second side is infrared emission lamp, and the infrared lamp of another side is infrared receiving lamp.
It should be noted that:
the foregoing descriptions of "first, second, and third …" are merely used for identification of names, and do not indicate a specific number or order.
The aforementioned "front side" refers to a side close to the viewer in front of the display screen in the touch display device, and the "rear side" is the other side opposite to the "front side";
the advantages or principles of the invention are explained below:
1. the light guide strip comprises a first refraction surface, a second refraction surface, a third refraction surface and a fourth refraction surface, and the second refraction surface and the third refraction surface are located between the first refraction surface and the fourth refraction surface. Because light can take place the refraction when entering into different another kind of medium from a medium, if first refracting surface is the incident surface of light, then light gets into the leaded light strip through first refracting surface, inside light got into the leaded light strip after the refraction of first refracting surface, then light gets into the second refracting surface, light takes place the refraction once more after the second refracting surface jets out, then light gets into the third refracting surface, light jets out the refraction once more after the third refracting surface jets out, then light gets into the fourth refracting surface, light jets out in following the leaded light strip after the refraction of fourth refracting surface. The light has deviated in the orbit behind first refracting surface, second refracting surface, third refracting surface and the fourth refracting surface, and the orbit height that the light that gets into first refracting surface compares its light with the light that jets out from the fourth refracting surface after the refraction has changed, and the light that jets out from the leaded light strip highly becomes high or the step-down for its orbit height of the light of kicking into the leaded light strip.
If the fourth refraction surface is the incident surface of the light, the light is refracted by the fourth refraction surface, the third refraction surface, the second refraction surface and the first refraction surface and then is emitted from the first refraction surface, the track height of the light entering the fourth refraction surface is changed compared with the track height of the light emitted from the first refraction surface after refraction, and the track height of the light emitted from the light guide strip is higher or lower than that of the light emitted into the light guide strip.
The intersection point of the first refraction surface or the extension line thereof and the second refraction surface or the extension line thereof is positioned at the first side, the intersection point of the third refraction surface or the extension line thereof and the fourth refraction surface or the extension line thereof is positioned at the second side, and the first side and the second side are respectively positioned at two sides opposite to the datum line. The first refraction surface and the second refraction surface form a quadrilateral structure with a triangular, trapezoidal or approximately trapezoidal cross section on the light guide strip, and the third refraction surface and the fourth refraction surface form a quadrilateral structure with a triangular, trapezoidal or approximately trapezoidal cross section on the light guide strip. The first side and the second side are respectively positioned at two opposite side edges of the datum line, one of the two formed triangles is an upright triangle, the other triangle is an inverted triangle, one of the two formed quadrilaterals is an upright trapezoid, the other triangle is an inverted trapezoid, then the light rays are refracted by the first refraction surface and the second refraction surface and then are emitted in the same direction in an offset mode, the light rays are refracted by the third refraction surface and the fourth refraction surface and then are emitted in the same direction in an offset mode, and the offset direction of the light rays refracted by the first refraction surface and the second refraction surface is opposite to the offset direction of the light rays refracted by the third refraction surface and the fourth refraction surface. When the light track height is changed after the light passes through the light guide strip, the third refraction surface and the fourth refraction surface correct the deviation of the emergent direction of the light after being refracted by the first refraction surface and the second refraction surface, or the first refraction surface and the second refraction surface correct the deviation of the emergent direction of the light after being refracted by the third refraction surface and the fourth refraction surface.
2. The first side and the second side are respectively positioned at two opposite sides of the datum line so as to pass through the first refracting surface,
The light refracted by the second refraction surface and the light refracted by the third refraction surface and the fourth refraction surface are deviated towards the directions of two opposite sides of the datum line, the emergent direction of the light after passing through the first refraction surface and the second refraction surface is deviated relative to the direction of the light emergent into the first refraction surface, and the emergent direction of the deviated light is corrected after passing through the third refraction surface and the fourth refraction surface. Or the emergent direction of the light after the light passes through the fourth refraction surface and the third refraction surface is deviated relative to the direction of the light entering the fourth refraction surface, and the emergent direction of the deviated light is corrected after the light passes through the second refraction surface and the first refraction surface.
3. The first side is located behind the reference line, the second side is located in front of the reference line, the cross section formed on the light guide strip between the first refraction surface and the second refraction surface is an inverted triangle or an inverted trapezoid, and the cross section formed on the light guide strip by the third refraction surface and the fourth refraction surface is an upright triangle or an upright trapezoid. According to the law of refraction, refracted rays and incident rays are respectively positioned on two sides of a normal line, when light enters a medium with low light speed from a medium with high light speed, the refraction angle is smaller than the incident angle, and when the light enters the medium with high light speed from the medium with low light speed, the refraction angle is larger than the incident angle. If the first refraction surface is an incidence surface, the light rays are refracted by the first refraction surface and the second refraction surface and then emitted in a direction of the second side in a deviation manner, the light rays refracted by the first refraction surface, the second refraction surface, the third refraction surface and the fourth refraction surface are deviated in the direction of the second side relative to the light rays entering from the first refraction surface, and the movement track of the light rays exiting from the fourth refraction surface is increased relative to the light rays entering from the first refraction surface. If the fourth refraction surface is an incidence surface, the light rays are refracted by the fourth refraction surface and the third refraction surface and then are deflected to the direction of the first side to be emitted, and the height of the motion track of the light rays passing through the fourth refraction surface, the third refraction surface, the second refraction surface and the first refraction surface is reduced relative to the light rays entering from the fourth refraction surface.
4. The refractive index of the light guide strip is fixed in the application, the deflection angle of the light is related to the vertex angles of the two triangles and the incident angle of the light, the included angle α is equal to the included angle β, the vertex angle of the triangle with the inverted cross section is the same as the vertex angle of the triangle with the upright cross section, and the deviation of the light can be corrected by only controlling the incident angle of the light.
5. The included angle between the extension lines of the first refraction surface and the first installation surface is smaller than 90 degrees, preferably 30 degrees to 60 degrees, and when the light rays are incident into the light guide strip from the first refraction surface in the direction parallel to the first installation surface, the included angle between the incident light rays and the first refraction surface is smaller than 90 degrees, preferably 30 degrees to 60 degrees. Since light is refracted when entering from one medium to another different medium, when the light enters from the medium with high light speed to the medium with low light speed, the refraction angle is smaller than the incidence angle, and the propagation speed of the light in the air is larger than that in the light guide strip. When the light is parallel to the direction of the first mounting surface and enters the light guide strip from the first refraction surface, the incident angle between the incident light and the normal of the first refraction surface is smaller than 90 degrees, the refraction angle of the light after being refracted by the first refraction surface is smaller than the incident angle, the light can only deviate towards the direction of the second side, the light after being refracted by the first refraction surface deviates towards the direction of the second side relative to the incident light, the movement track of the light becomes high, and meanwhile, the light after being refracted by the first refraction surface can not deviate from the light guide strip due to the angle limitation between the extension lines of the first refraction surface and the first mounting surface.
6. The included angle between the fourth refraction surface and the first installation surface is 70 degrees to 90 degrees, after the light passes through the first refraction surface and the second refraction surface, the emergent direction of the light deviates to the direction of the second side relative to the incident direction of the light entering the first refraction surface and the second refraction surface, and the emergent direction of the light after passing through the third refraction surface and the fourth refraction surface deviates to the direction of the first side relative to the incident direction of the light entering the third refraction surface and the fourth refraction surface, and the emergent direction of the light after passing through the third refraction surface deviates slightly to the direction of the second side relative to the incident direction of the light entering the first refraction surface, or is approximately parallel to the incident direction of the light entering the first refraction surface. When light enters a medium with high light speed from a medium with low light speed, the refraction angle is larger than the incident angle, the angle between the fourth refraction surface and the first installation surface is limited, so that the deviation of the emergent direction of the light passing through the fourth refraction surface to the first side direction relative to the incident direction of the light entering the fourth refraction surface is small, and the emergent direction of the light refracted through the fourth refraction surface is consistent with the incident direction of the light entering the first refraction surface.
7. The light guide strip is further provided with a first installation surface and a second installation surface, and the light guide strip is installed on the touch display equipment through the first installation surface and the second installation surface.
8. The first refracting surface of leaded light strip is close to the infrared lamp, the infrared light of infrared lamp transmission gets into the leaded light strip through first refracting surface inside, the infrared light is through first refracting surface, the second refracting surface, jet out after third refracting surface and the refraction of fourth refracting surface, the infrared light that jets out through the fourth refracting surface has taken place the change for the height of the infrared light that gets into through first refracting surface, make the high uprising of the infrared light behind the leaded light strip, make the infrared lamp still can satisfy the requirement that the touch was write highly under the very low condition of mounted position. Or the infrared light enters the light guide strip through the fourth refraction surface and is refracted and then emitted through the fourth refraction surface, the third refraction surface, the second refraction surface and the first refraction surface, the movement track of the infrared light is changed by the light guide strip, the height of the infrared light passing through the light guide strip is reduced, and the infrared light can still be received by the infrared lamp under the condition that the installation position is very low.
9. The light guide strip is fixed on the frame through the fixing groove and the protruding portion, the fixing mode of the light guide strip and the frame is simple, and the light guide strip is simple and convenient to install.
10. Leaded light strip and glass screen looks butt do not have the clearance between leaded light strip and the glass screen, and inside touch display device can not get into between leaded light strip and the glass screen through dust etc. of touch display device outside, can not cause the influence because of entering touch-sensitive to touch display device such as dust.
11. The frame has relative first side and second side, and wherein the infrared lamp of one side be infrared emission lamp, and the infrared lamp of another side is infrared receiving lamp, and the infrared light of the infrared emission lamp transmission of one side lies in the glass screen front side behind the leaded light strip, then the infrared light is received by infrared receiving lamp behind the leaded light strip of another side, realizes that infrared receiving lamp still can satisfy the touch and write the requirement under the very low condition of mounted position.
Drawings
Fig. 1 is a schematic view of a partial cross-sectional view of a touch display device of the present embodiment;
FIG. 2 is a partial perspective view of the light guide bar of the present embodiment;
FIG. 3 is a cross-sectional view of a light guide bar according to the present embodiment;
FIG. 4 is a schematic view of a light ray trace of the light ray entering the light guide bar according to the present embodiment;
description of reference numerals:
100. a light guide strip; 110. a first refractive surface; 120. a second refraction surface; 130. a third refraction surface; 140. a fourth refracting surface; 150. a first mounting surface; 160. a second mounting surface; 200. a reference line; 400. a glass screen; 500. a frame; 600. an infrared lamp; 700. an infrared PCB board; 170. fixing grooves; 510. a projection.
Detailed Description
The following describes embodiments of the present invention in detail.
As shown in fig. 2, the present embodiment discloses a light guide strip 100, the light guide strip 100 has a first refraction surface 110, a second refraction surface 120, a third refraction surface 130 and a fourth refraction surface 140, wherein the second refraction surface 120 and the third refraction surface 130 are located between the first refraction surface 110 and the fourth refraction surface 140. As shown in fig. 3, a connection line between a midpoint of the first refraction surface 110 and a midpoint of the fourth refraction surface 140 is taken as a reference line 200, and the first side and the second side are respectively located at two opposite sides of the reference line 200.
Because light can take place the refraction when entering into different another kind of medium from a medium, if first refraction face 110 is the incident surface of light, then light gets into leaded light strip 100 through first refraction face 110, inside light got into leaded light strip 100 after the refraction of first refraction face 110, then light gets into second refraction face 120, light takes place the refraction again after the second refraction face 120 jets out, then light gets into third refraction face 130, light jets out the back and takes place the refraction again through third refraction face 130, then light gets into fourth refraction face 140, light jets out in following leaded light strip 100 after the refraction of fourth refraction face 140. The trajectory of the light ray after passing through the first refraction surface 110, the second refraction surface 120, the third refraction surface 130 and the fourth refraction surface 140 is shifted, the trajectory height of the light ray entering the first refraction surface 110 is changed compared with the trajectory height of the light ray emitted from the fourth refraction surface 140 after being refracted, and the trajectory height of the light ray emitted from the light guide strip 100 is higher or lower than the trajectory height of the light ray emitted into the light guide strip 100.
If the fourth refraction surface 140 is an incident surface of the light, the light is refracted by the fourth refraction surface 140, the third refraction surface 130, the second refraction surface 120, and the first refraction surface 110 and then exits from the first refraction surface 110. The light entering fourth refraction surface 140 has a trajectory height that is changed from the light emitted from first refraction surface 110 after being refracted, and the trajectory height of the light emitted from light guide strip 100 becomes higher or lower than the trajectory height of the light incident on light guide strip 100.
The first refraction surface 110 and the second refraction surface 120 form a quadrilateral structure with a triangular, trapezoidal or approximately trapezoidal cross section on the light guide strip 100, and the third refraction surface 130 and the fourth refraction surface 140 form a quadrilateral structure with a triangular, trapezoidal or approximately trapezoidal cross section on the light guide strip 100. Since the first side and the second side are located on opposite sides of the reference line 200, respectively, one of the two triangles is an upright triangle, and the other is an inverted triangle, and of the two quadrangles formed, one is an upright trapezoid, and the other is an inverted trapezoid.
The light is refracted by the first refraction surface 110 and the second refraction surface 120 and then emitted in the same direction in a deviated mode, the light is refracted by the third refraction surface 130 and the fourth refraction surface 140 and then emitted in the same direction in a deviated mode, and the deviated direction of the light refracted by the first refraction surface 110 and the second refraction surface 120 is opposite to the deviated direction of the light refracted by the third refraction surface 130 and the fourth refraction surface 140. When the light trajectory height changes after passing through the light guide strip 100, the third refractive surface 130 and the fourth refractive surface 140 correct the exit direction of the light refracted by the first refractive surface 110 or the second refractive surface 120, or the first refractive surface 110 and the second refractive surface 120 correct the exit direction of the light refracted by the third refractive surface 130 and the fourth refractive surface 140.
The first side and the second side are respectively located at two opposite sides of the reference line 200 and pass through the first refracting surface 110,
The light refracted by the second refracting surface 120 and the light refracted by the third refracting surface 130 and the fourth refracting surface 140 are shifted toward opposite sides of the reference line 200. The emitting direction of the light after passing through the first refraction surface 110 and the second refraction surface 120 is shifted relative to the direction of the light entering the first refraction surface 110, and the emitting direction of the shifted light is corrected after passing through the third refraction surface 130 and the fourth refraction surface 140. Or the outgoing direction of the light after passing through the fourth refractive surface 140 and the third refractive surface 130 is shifted from the direction of the light entering the fourth refractive surface 140, and the outgoing direction of the shifted light is corrected after passing through the second refractive surface 120 and the first refractive surface 110.
When the first side is located at the rear side of reference line 200 and the second side is located at the front side of reference line 200, the cross section formed on light guide strip 100 between first refractive surface 110 and second refractive surface 120 is an inverted triangle or an inverted trapezoid, and the cross section formed on light guide strip 100 by third refractive surface 130 and fourth refractive surface 140 is an erected triangle or an erected trapezoid. According to the law of refraction, incident light and refracted light are respectively positioned on two sides of a normal, when light enters a medium with low light speed from a medium with high light speed, the refraction angle is smaller than the incident angle, and when the light enters the medium with high light speed from the medium with low light speed, the refraction angle is larger than the incident angle. When the light beam enters through the first refraction surface 110, the light beam refracted by the first refraction surface 110 and the second refraction surface 120 is deflected and emitted in the direction of the second side, the light beam refracted by the first refraction surface 110, the second refraction surface 120, the third refraction surface 130 and the fourth refraction surface 140 is deflected in the direction of the second side relative to the light beam entering from the first refraction surface 110, and the height of the movement locus of the light beam exiting from the fourth refraction surface 140 is increased relative to the light beam entering from the first refraction surface 110. If the fourth refraction surface 140 is an incident surface, the light passes through the fourth refraction surface 140,
The light refracted by the third refracting surface 130 is deflected in the first direction and then emitted out of the first refracting surface 140,
The light rays after the third refractive surface 130, the second refractive surface 120, and the first refractive surface 110 have a lower height of the movement locus with respect to the light rays entering from the fourth refractive surface 140.
As shown in fig. 3, an angle formed by the intersection of the first refraction surface 110 or the extension thereof and the second refraction surface 120 or the extension thereof is α, an angle formed by the intersection of the third refraction surface 130 or the extension thereof and the fourth refraction surface 140 or the extension thereof is β, an angle difference between the angle α and the angle β is 0 to 20 degrees, and an angle between the angle α and the angle β is preferably equal.
In this embodiment, the first refraction surface 110 or its extension line intersects the second refraction surface 120 or its extension line to form an inverted triangle, the third refraction surface 130 or its extension line intersects the fourth refraction surface 140 or its extension line to form an upright triangle, the two triangle-shaped cross-sections are similar to two triangular prisms, in which the deflection angle is related to the refractive index of the prism, the vertex angle of the prism and the incidence angle, the refractive index of the light guide strip 100 in this embodiment is fixed, the deflection angle of the light is related to the vertex angles of the two triangles and the incidence angle of the light, and the vertex angle of the inverted triangle and the vertex angle of the upright triangle are the same because the angle α is equal to the angle β, and the deflected light can be corrected by controlling the incidence angle of the light.
As shown in fig. 4, the light guide strip 100 further includes a first mounting surface 150 and a second mounting surface 160, the first mounting surface 150 is parallel to the second mounting surface 160, and the first refraction surface 110, the first mounting surface 150, the fourth refraction surface 140, and the second mounting surface 160 are sequentially connected to form an annular structure. The first mounting surface 150 and the second mounting surface 160 are respectively located at two sides of the reference line 200, and the light guide bar 100 is mounted on the touch display device or other devices through the first mounting surface 150 and the second mounting surface 160.
Referring to fig. 4, the first refraction surface 110 intersects the first installation surface 150, and the angle between the first refraction surface 110 and the extension line of the first installation surface 150 is α 1 degrees, and α 1 degrees is smaller than 90 degrees, preferably 30 degrees to 60 degrees, when light rays enter the light guide strip 100 from the first refraction surface 110 in a direction parallel to the first installation surface 150, the angle between the incident light rays and the first refraction surface 110 is smaller than 90 degrees, preferably 30 degrees to 60 degrees, because light is refracted when entering another different medium from one medium, the light rays enter a medium with a small light speed from a medium with a large light speed, the refraction angle is smaller than the incident angle, the propagation speed of the light in the air is greater than the propagation speed in the light guide strip 100, when light rays enter the light guide strip 100 from the first refraction surface 110 in a direction parallel to the first installation surface 150, the incident angle between the incident light rays and the first refraction surface 110 is smaller than 90 degrees, the refraction angle after being refracted by the first refraction surface 110 is smaller than the incident angle, only the direction of the light rays can be deflected toward the direction of the first side of the first refraction surface 160, and the incident light rays do not deviate from the direction of the first installation surface, so that the refraction surface 110, the light rays and the light rays do not deviate from the refraction angle of the first installation surface 110, thereby limiting the refraction angle.
The fourth refraction surface 140 also intersects the first mounting surface 150, and the angle between the fourth refraction surface 140 and the first mounting surface 150 is β 1 degrees and the angle between β 1 degrees and 90 degrees, after the light passes through the first refraction surface 110 and the second refraction surface 120, the exit direction of the light is shifted to the second side direction relative to the incident direction of the light entering the first refraction surface 110 and the second refraction surface 120, and the exit direction of the light after passing through the third refraction surface 130 and the fourth refraction surface 140 is shifted to the first side direction relative to the incident direction of the light entering the third refraction surface 130 and the fourth refraction surface 140, and when the exit direction of the light after passing through the third refraction surface 130 is slightly shifted to the second side direction relative to the incident direction of the light entering the first refraction surface 110, or is approximately parallel to the incident direction of the light entering the first refraction surface 110, when the light enters a medium with a large light speed from a medium with a small light speed, the refraction angle is larger than the refraction angle, and the incident direction of the light between the fourth refraction surface 140 and the first mounting surface 150 is limited so that the exit direction of the light after passing through the fourth refraction surface 140 is consistent with the incident direction of the light entering the first refraction surface 140.
When the fourth refraction surface 140 is an incident surface, the first refraction surface 110 is an emergent surface, and the light enters the fourth refraction surface 140 in a direction parallel to the first mounting surface 150, the deviation direction of the light is opposite to that described above, the principle is the same, and details are not repeated.
As shown in fig. 1, the present embodiment further discloses a touch display device, which includes a display module (not shown), a glass screen 400, a frame 500, an infrared lamp 600, and the light guide bar 100 as described above. Wherein display module assembly and glass screen 400 install on frame 500, and display module assembly is located the rear side of glass screen 400, is equipped with infrared PCB board 700 installation position on the frame 500, installs infrared PCB board 700 on the installation position, and infrared lamp 600 is installed on infrared PCB board 700, and infrared lamp 600 is located the front side of a side of glass screen 400.
The light guide strip 100 is fixed on the frame 500, the light guide strip 100 is located on a light transmission channel of the infrared lamp 600, and the first refraction surface 110 is close to the infrared lamp 600. The infrared light emitted by the infrared lamp 600 enters the light guide bar 100 through the first refraction surface 110, the infrared light is refracted through the first refraction surface 110, the second refraction surface 120, the third refraction surface 130 and the fourth refraction surface 140 and then emitted, the height of the infrared light emitted through the fourth refraction surface 140 is changed relative to the height of the infrared light emitted through the first refraction surface 110, the height of the infrared light passing through the light guide bar 100 is increased, and the requirement of the touch writing height can be still met when the installation position of the infrared lamp 600 is very low. Or the infrared light enters the light guide strip 100 through the fourth refraction surface 140 and is refracted and emitted through the fourth refraction surface 140, the third refraction surface 130, the second refraction surface 120 and the first refraction surface 110, the light guide strip 100 changes the movement track of the infrared light, so that the height of the infrared light passing through the light guide strip 100 is reduced, and the infrared light can still be received by the infrared lamp 600 under the condition of a very low installation position.
The frame 500 has a first side, a second side, a third side and a fourth side, the first side is opposite to the second side, the third side is opposite to the fourth side, and the infrared lamp 600 and the light guide bar 100 are installed on the first side, the second side, the third side and the fourth side.
The infrared lamp 600 on the first side corresponds to the infrared lamp 600 on the second side, and the infrared lamp 600 on the third side corresponds to the infrared lamp 600 on the fourth side, wherein the infrared lamps 600 on the first side and the third side are infrared emitting lamps, and the infrared lamps 600 on the second side and the fourth side are infrared receiving lamps. The infrared light of the infrared lamp 600 transmission of first side is located the front side of glass screen 400 behind light guide strip 100, then receives by the infrared receiving lamp of second side behind the light guide strip 100 of second side, and the infrared light of the infrared lamp 600 transmission of third side is located the front side of glass screen 400 behind light guide strip 100, then receives by the infrared receiving lamp of fourth side behind the light guide strip 100 of fourth side.
In order to fix the light guide strip 100 and the frame 500, the fixing groove 170 is formed in the light guide strip 100, the protrusion 510 is arranged on the frame 500, the protrusion 510 is matched with the fixing groove 170, the light guide strip 100 is fixed with the frame 500 through the fixing groove 170 and the protrusion 510, the fixing mode of the light guide strip 100 is simple, and the light guide strip 100 is convenient to install.
The above are only specific embodiments of the present invention, and the protection scope of the present invention is not limited thereby; any replacement and improvement made on the basis of not violating the conception of the utility model belong to the protection scope of the utility model.
Claims (13)
1. Light guide strip, its characterized in that has first refracting surface, second refracting surface, third refracting surface and fourth refracting surface, second refracting surface and third refracting surface are located between first refracting surface and the fourth refracting surface, first refracting surface or its extension line with the crossing point of second refracting surface or its extension line is located first side, third refracting surface or its extension line with the crossing point of fourth refracting surface or its extension line is located the second side to the midpoint of first refracting surface with the line of the midpoint of fourth refracting surface is the datum line, first side, the second side is located respectively the opposite both sides of datum line.
2. The light guide bar of claim 1, wherein the first side is located behind the reference line and the second side is located in front of the reference line.
3. The light guide strip of claim 1, wherein the intersection of the first refractive surface or the extension thereof and the second refractive surface or the extension thereof forms an included angle of α, the intersection of the third refractive surface or the extension thereof and the fourth refractive surface or the extension thereof forms an included angle of β, and the difference between the included angle α and the included angle β is 0-20 degrees.
4. The light guide strip of claim 3, wherein the included angle α is equal to the included angle β.
5. The light guide strip of any of claims 1 to 4, wherein the light guide strip further has a first mounting surface and a second mounting surface, the first mounting surface and the second mounting surface being located on both sides of the reference line.
6. The light guide strip of claim 5, wherein the first refraction surface intersects the first installation surface, and an included angle between the first refraction surface and an extension of the first installation surface is less than 90 degrees.
7. The light guide strip of claim 6, wherein an angle between the first refraction surface and an extension of the first installation surface is 30 degrees to 60 degrees.
8. The light guide strip of claim 5, wherein the fourth refracting surface intersects the first installation surface, and an included angle between the fourth refracting surface and the first installation surface is 70 degrees to 90 degrees.
9. The light guide strip of claim 5, wherein the first refractive surface, the first mounting surface, the fourth refractive surface, and the second mounting surface are connected in series to form an annular structure.
10. Touch display device, its characterized in that, including display module assembly, glass screen, frame, infrared lamp and the leaded light strip of above-mentioned any claim, the display module assembly reaches the glass screen is installed on the frame, the display module assembly is located the rear side of glass screen, the infrared lamp is fixed in on the frame, and is located the front side of a side of glass screen, the leaded light strip is fixed in on the frame, the leaded light strip is located the light transmission channel of infrared lamp, first refraction face is close to the infrared lamp.
11. The touch display device of claim 10, wherein a fixing groove is formed on the light guide bar, a protrusion is formed on the frame, the protrusion matches with the fixing groove, and the light guide bar is fixed to the frame through the fixing groove and the protrusion.
12. The touch display device of claim 11, wherein the light guide bar abuts the glass screen.
13. The touch display device of claim 10, wherein the bezel has at least a first side and a second side, the first side is opposite to the second side, the first side and the second side are both provided with an infrared lamp and a light guide bar, the first side corresponds to the infrared lamp of the second side, the infrared lamp of one of the first side and the second side is an infrared emitting lamp, and the infrared lamp of the other side is an infrared receiving lamp.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921547208.XU CN210514678U (en) | 2019-09-17 | 2019-09-17 | Light guide strip and touch display device |
| PCT/CN2020/105913 WO2021052027A1 (en) | 2019-09-17 | 2020-07-30 | Light guide strip and touch display device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921547208.XU CN210514678U (en) | 2019-09-17 | 2019-09-17 | Light guide strip and touch display device |
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| Publication Number | Publication Date |
|---|---|
| CN210514678U true CN210514678U (en) | 2020-05-12 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921547208.XU Active CN210514678U (en) | 2019-09-17 | 2019-09-17 | Light guide strip and touch display device |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN210514678U (en) |
| WO (1) | WO2021052027A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2021052027A1 (en) * | 2019-09-17 | 2021-03-25 | 广州创知科技有限公司 | Light guide strip and touch display device |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9140901B2 (en) * | 2011-08-12 | 2015-09-22 | Bae Systems Information And Electronic Systems Integration Inc. | Ultra wide band achromatic Risley prism scanner |
| CN203535606U (en) * | 2013-10-12 | 2014-04-09 | 锐达互动科技股份有限公司 | Image touch positioning device based on four cameras |
| CN207833473U (en) * | 2017-12-24 | 2018-09-07 | 广州视源电子科技股份有限公司 | A kind of narrow side touch frame |
| CN208752595U (en) * | 2018-09-12 | 2019-04-16 | 广州华欣电子科技有限公司 | A kind of infrared touch panel and terminal |
| CN109885212A (en) * | 2019-02-19 | 2019-06-14 | 广州视源电子科技股份有限公司 | Touch frame and touch display screen |
| CN210514678U (en) * | 2019-09-17 | 2020-05-12 | 广州创知科技有限公司 | Light guide strip and touch display device |
-
2019
- 2019-09-17 CN CN201921547208.XU patent/CN210514678U/en active Active
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2020
- 2020-07-30 WO PCT/CN2020/105913 patent/WO2021052027A1/en active Application Filing
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2021052027A1 (en) * | 2019-09-17 | 2021-03-25 | 广州创知科技有限公司 | Light guide strip and touch display device |
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| Publication number | Publication date |
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| WO2021052027A1 (en) | 2021-03-25 |
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