WO2021052027A1 - Light guide strip and touch display device - Google Patents

Light guide strip and touch display device Download PDF

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Publication number
WO2021052027A1
WO2021052027A1 PCT/CN2020/105913 CN2020105913W WO2021052027A1 WO 2021052027 A1 WO2021052027 A1 WO 2021052027A1 CN 2020105913 W CN2020105913 W CN 2020105913W WO 2021052027 A1 WO2021052027 A1 WO 2021052027A1
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WO
WIPO (PCT)
Prior art keywords
refraction surface
light
light guide
refraction
guide strip
Prior art date
Application number
PCT/CN2020/105913
Other languages
French (fr)
Chinese (zh)
Inventor
陈玉香
Original Assignee
广州创知科技有限公司
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Filing date
Publication date
Application filed by 广州创知科技有限公司 filed Critical 广州创知科技有限公司
Publication of WO2021052027A1 publication Critical patent/WO2021052027A1/en

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    • GPHYSICS
    • G02OPTICS
    • G02BOPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • GPHYSICS
    • G06COMPUTING; CALCULATING OR COUNTING
    • G06FELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00Input 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
    • G06F3/01Input arrangements or combined input and output arrangements for interaction between user and computer
    • G06F3/03Arrangements for converting the position or the displacement of a member into a coded form
    • G06F3/041Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
    • G06F3/042Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by opto-electronic means

Definitions

  • This application relates to the field of display devices, more specifically, a light guide bar and touch display device.
  • An infrared touch display device is a touch device that uses a dense infrared matrix in the X and Y directions to detect and locate touch operations.
  • the infrared light emitted by the infrared lamp is generally located on the front side of the glass screen through the light guide strip. After the infrared light passes through the light guide strip, its height from the glass screen surface is basically unchanged. The height of the rear infrared light can meet the writing height on the glass screen.
  • the center line of the lamp bead of the infrared lamp generally has a relatively high distance from the surface of the glass screen.
  • the inventor found that the prior art has The distance between the center line of the lamp bead and the surface of the glass screen is relatively high, which results in a higher height of the frame for installing the infrared lamp from the surface of the glass screen.
  • the purpose of this application is to provide a light guide strip and a touch display device.
  • the light guide strip changes the trajectory of light so that the infrared lamp of the touch display device can still meet the touch writing height even when the distance from the glass screen surface is low. It can reduce the height of the frame where the infrared lamp is installed.
  • This application discloses a light guide strip.
  • the light guide strip has a first refraction surface, a second refraction surface, a third refraction surface and a fourth refraction surface, the second refraction surface and the third refraction surface are located between the first refraction surface and the fourth refraction surface,
  • the intersection of the first refraction surface or its extension line and the second refraction surface or its extension line is located on the first side, and the third refraction surface or its extension line and the fourth refraction surface or its extension line are The intersection is located on the second side, and the line connecting the midpoint of the first refraction surface and the midpoint of the fourth refraction surface is taken as the reference line, and the first side and the second side are respectively located opposite to the reference line On both sides.
  • the first side is located on the back side of the reference line, and the second side is located on the front side of the reference line.
  • the angle formed by the intersection of the first refraction surface or its extension line and the second refraction surface or its extension line is ⁇
  • the third refraction surface or its extension line and the fourth refraction surface or its extension is ⁇
  • the angle difference between the angle ⁇ and the angle ⁇ is 0 to 20 degrees.
  • the angle ⁇ is equal to the angle ⁇ .
  • the light guide strip further has a first mounting surface and a second mounting surface, and the first mounting surface and the second mounting surface are respectively located on both sides of the reference line.
  • the first refraction surface intersects the first mounting surface, and the included angle between the first refraction surface and the extension line of the first mounting surface is less than 90 degrees.
  • the included angle between the first refraction surface and the extension line of the first mounting surface is 30 degrees to 60 degrees.
  • the fourth refraction surface intersects the first mounting surface, and the included angle between the fourth refraction surface and the first mounting surface is 70 degrees to 90 degrees.
  • the first refraction surface, the first mounting surface, the fourth refraction surface, and the second mounting surface are sequentially connected to form a ring structure.
  • the application also discloses a touch display device.
  • the touch display device includes a display module, a glass screen, a frame, an infrared lamp, and the light guide strip as described above.
  • the display module and the glass screen are installed on the frame, and the display module The group is located on the back side of the glass screen, the infrared lamp is fixed on the frame, and is located on the front side of one side of the glass screen, the light guide strip is fixed on the frame, and the guide The light bar is located on the light transmission channel of the infrared lamp, and the first refraction surface 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 matches the fixing groove
  • the light guide strip passes through the fixing groove and the protruding part Fixed with the frame.
  • the light guide strip abuts against the glass screen.
  • the frame has at least a first side and a second side.
  • the first side is opposite to the second side.
  • Both the first side and the second side are provided with infrared lamps and The light guide strip, the first side edge corresponds to the infrared lamp on the second side edge, the infrared lamp on one of the first side edge and the second side edge is an infrared emitting lamp, and the other The infrared light on one side is an infrared receiving light.
  • front side refers to the side of the touch display device that is close to the viewer in front of the display screen, and the “rear side” is the other side opposite to the "front side”;
  • the light guide strip includes a first refraction surface, a second refraction surface, a third refraction surface, and a fourth refraction surface.
  • the second refraction surface and the third refraction surface are located between the first refraction surface and the fourth refraction surface. Since light is refracted when entering a different medium from one medium, if the first refraction surface is the incident surface of the light, the light enters the light guide through the first refraction surface, and the light is refracted by the first refraction surface.
  • the light enters the second refraction surface, the light passes through the second refraction surface and then refracts again, then the light enters the third refraction surface, the light passes through the third refraction surface and then refracts again, and then the light enters the first refraction surface.
  • the light is emitted from the light guide bar after being refracted by the fourth refraction surface.
  • the trajectory of the light is shifted.
  • the light entering the first refraction surface is different from the light exiting the fourth refraction surface after being refracted.
  • the height of the trajectory of the light is changed, and the trajectory height of the light emitted from the light guide strip becomes higher or lower than that of the light entering the light guide strip.
  • 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 exits from the first refraction surface, and the light entering the fourth refraction surface and After refraction, the trajectory height of the light emitted from the first refraction surface is changed compared to the trajectory height of the light, and the trajectory height of the light emitted from the light guide strip becomes higher or lower than that of the light entering the light guide strip.
  • the intersection of the first refraction surface or its extension and the second refraction surface or its extension is on the first side
  • the intersection of the third refraction surface or its extension and the fourth refraction surface or its extension is on the second side
  • One side and the second side are respectively located on opposite sides of the reference line.
  • the first refraction surface and the second refraction surface form a triangular, trapezoidal or quadrilateral cross-section structure on the light guide strip
  • the third refraction surface and the fourth refraction surface form a triangular, trapezoidal or trapezoidal cross-section on the light guide strip.
  • a quadrilateral structure similar to a trapezoid.
  • the first side and the second side are located on opposite sides of the reference line.
  • One of the two triangles formed is an upright triangle and the other is an inverted triangle. Of the two quadrilaterals formed, one is an upright triangle. Trapezoid, the other is an inverted trapezoid, the light is deflected and emitted in the same direction after being refracted by the first and second refraction surfaces, and the light is deflected in the same direction after being refracted by the third and fourth refraction surfaces It is emitted, and the deflection direction of the light after being refracted by the first and second refraction surfaces is opposite to the deflection direction after being refracted by the third and fourth refraction surfaces.
  • the third and fourth refraction surfaces correct the direction of exit 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 for correcting deviation of the exit direction of the light rays refracted by the third refraction surface and the fourth refraction surface.
  • the first side and the second side are respectively located on opposite sides of the reference line, so that the light refracted by the first and second refraction surface and the light refracted by the third refraction surface and the fourth refraction surface are directed to the reference
  • the direction of the opposite sides of the line is shifted. After the light passes through the first refraction surface and the second refraction surface, the exit direction of the light is shifted relative to the direction of the light incident on the first refraction surface.
  • the light passes through the third refraction surface,
  • the fourth refracting surface corrects the exit direction of the shifted light.
  • the exit direction of the light is shifted relative to the direction of the light entering the fourth refraction surface, and the light is shifted after passing through the second refraction surface and the first refraction surface.
  • the direction of light emission is corrected.
  • the first side is located on the back side of the reference line, and the second side is located on the front side 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.
  • the cross section formed by the third refraction surface and the fourth refraction surface on the light guide strip is an upright triangle or an upright trapezoid.
  • the angle of refraction is greater than the angle of incidence. If the first refraction surface is the incident surface, the light is refracted by the first refraction surface and the second refraction surface, and then the light is deflected and emitted in the direction of the second side, and passes through the first refraction surface, the second refraction surface, the third refraction surface, The light refracted by the fourth refraction surface is shifted to the second side relative to the light incident from the first refraction surface, and the light emitted from the fourth refraction surface moves relative to the light incident from the first refraction surface. The trajectory becomes higher.
  • the fourth refraction surface is the incident surface, the light is refracted by the fourth refraction surface and the third refraction surface, and then the light is deflected and emitted in the direction of the first side, and passes through the fourth refraction surface, the third refraction surface, the second refraction surface, The light behind the first refracting surface has a lower height relative to the trajectory of the light incident from the fourth refracting surface.
  • the cross section formed is an inverted triangle.
  • the third refraction surface or its extension line intersects the fourth refraction surface or its extension line.
  • the formed cross-section is an upright triangle, and the light guide strip has the function of guiding light.
  • the structure with two triangular cross-sections is similar to two prisms. In a prism, the deflection angle is related to the refractive index of the prism, the apex angle of the prism, and the prism. The angle of incidence is related.
  • the refractive index of the light guide strip is fixed, and the deflection angle of the light is related to the apex angle of the two triangles and the incident angle of the light. If the angle ⁇ and the angle ⁇ are equal, the cross section is an inverted triangle. The apex angle of is the same as the apex angle of a triangle whose cross-section is upright. Only the incident angle of the light needs to be controlled to correct the deviation of the offset light.
  • the angle between the first refraction surface and the extension of the first mounting surface is less than 90 degrees, preferably 30 degrees to 60 degrees, and the light is parallel to the first mounting surface and enters the light guide from the first refraction surface.
  • the angle between the incident light and the first refracting surface is less than 90 degrees, preferably 30 degrees to 60 degrees. Since light is refracted when entering a different medium from one medium, when light enters a medium with a high speed of light into a medium with a low speed of light, the angle of refraction is less than the angle of incidence, and the propagation speed of light in the air is greater than that in the light guide. The speed of propagation in the bar.
  • the incident angle between the incident light and the normal of the first refraction surface is less than 90 degrees, and the light is refracted by the first refraction surface.
  • the angle of refraction is smaller than the angle of incidence, and the light can only be shifted toward the second side, so that the light refracted by the first refraction surface shifts toward the second side with respect to the incident light, and the trajectory of the light becomes higher.
  • the angle between the first refraction surface and the extension line of the first installation surface is limited so that the light rays refracted by the first refraction surface will not deviate from the light guide bar.
  • the angle between the fourth refraction surface and the first mounting surface is 70 degrees to 90 degrees.
  • the exit direction of the light is relative to the first refraction surface and the second refraction surface.
  • the incident direction of the two refraction surfaces is shifted to the direction of the second side, and the exit direction of the light after the light passes through the third refraction surface and the fourth refraction surface is relative to the incident direction of the third refraction surface and the fourth refraction surface.
  • the direction of the first side is shifted, and the exit direction of the light after passing through the third refraction surface is slightly shifted to the direction of the second side with respect to the incident direction of the light entering the first refraction surface, or is different from the direction of the first refraction.
  • the incident directions of the light rays on the surface are approximately parallel.
  • the angle of refraction is greater than the angle of incidence, and the angle between the fourth refracting surface and the first mounting surface is limited, so that the exit direction of the light after passing through the fourth refracting surface is relative to the incident
  • the incident direction of the fourth refraction surface has a small deviation to the first side direction, ensuring that the exit direction of the light rays refracted by the fourth refraction surface is consistent with the incident direction of the light rays entering the first refraction surface.
  • the light guide strip also has a first mounting surface and a second mounting surface, and the light guide strip is mounted on the touch display device through the first mounting surface and the second mounting surface.
  • the first refraction surface of the light guide strip is close to the infrared lamp, the infrared light emitted by the infrared lamp enters the light guide strip through the first refraction surface, and the infrared light passes through the first refraction surface, the second refraction surface, the third refraction surface and the first refraction surface.
  • the height of the infrared light emitted through the fourth refraction surface is changed relative to that of the infrared light entering through the first refraction surface, so that the height of the infrared light after passing through the light guide becomes higher, so that the infrared light It can still meet the requirements of touch writing height even when the installation position is very low.
  • infrared light enters the light guide strip through the fourth refraction surface, and exits after being refracted by the fourth refraction surface, the third refraction surface, the second refraction surface and the first refraction surface.
  • the light guide strip changes the movement trajectory of the infrared light to make The height of the infrared light after passing through the light guide bar is reduced, so that the infrared lamp can still receive the infrared light even when the installation position is very low.
  • the light guide strip is fixed on the frame through the fixing groove and the protruding part, the fixing method of the light guide strip and the frame is simple, and the installation of the light guide strip is simple and convenient.
  • the light guide strip is in contact with the glass screen. There is no gap between the light guide strip and the glass screen. Dust outside the touch display device will not enter the touch display device through the light guide strip and the glass screen. The entry of dust, etc., affects the touch sensitivity of the touch display device.
  • the frame has opposite first and second sides, and the infrared lamp on one side is an infrared emitting lamp, the infrared lamp on the other side is an infrared receiving lamp, and the infrared emitting lamp on one side emits
  • the infrared light is located on the front side of the glass screen after passing through the light guide strip, and then the infrared light is received by the infrared receiving lamp after passing through the light guide strip on the other side, so that the infrared receiving lamp can still meet the requirements of touch writing even when the installation position is very low.
  • FIG. 1 is a schematic diagram of a partial cross-sectional view of the touch display device of this embodiment
  • Figure 2 is a partial perspective view of the light guide strip of this embodiment
  • Figure 3 is a cross-sectional view of the light guide strip of this embodiment
  • Light guide strip 110, first refraction surface; 120, second refraction surface; 130, third refraction surface; 140, fourth refraction surface; 150, first mounting surface; 160, second mounting surface; 200, Baseline; 400, glass screen; 500, frame; 600, infrared lamp; 700, infrared PCB board; 170, fixed slot.
  • this 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.
  • the refraction surface 120 and the third refraction surface 130 are located between the first refraction surface 110 and the fourth refraction surface 140.
  • the intersection of the first refractive surface 110 or its extension and the second refractive surface 120 or its extension is located on the first side, and the intersection of the third refractive surface 130 or its extension and the fourth refractive surface 140 or its extension is located on the second side.
  • the line connecting the midpoint of the first refraction surface 110 and the midpoint of the fourth refraction surface 140 is taken as the reference line 200, and the first side and the second side are respectively located on opposite sides of the reference line 200. side.
  • the first refraction surface 110 Since light is refracted when entering a different medium from one medium, if the first refraction surface 110 is the incident surface of the light, the light enters the light guide 100 through the first refraction surface 110, and the light passes through the first refraction.
  • the surface 110 enters the light guide strip 100 after being refracted, then the light enters the second refraction surface 120, the light passes through the second refraction surface 120 and then refracts again, then the light enters the third refraction surface 130, and the light exits through the third refraction surface 130 After that, it is refracted again, and then the light enters the fourth refraction surface 140, and the light is refracted by the fourth refraction surface 140 and then exits the light guide strip 100.
  • the trajectory of the light is shifted.
  • the light entering the first refraction surface 110 is different from the fourth refraction after being refracted.
  • the light rays emitted from the surface 140 have a different trajectory height compared to the light rays.
  • the light rays emitted from the light guide strip 100 have higher or lower trajectory heights relative to the light rays incident on the light guide strip 100.
  • the fourth refraction surface 140 is the 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 the first refraction surface 110.
  • the trajectory height of the light entering the fourth refraction surface 140 and the light exiting the first refraction surface 110 after being refracted has changed.
  • the light exiting from the light guide strip 100 is relative to the light entering the light guide strip 100. The height of its trajectory becomes higher or lower.
  • the cross section formed on the light guide strip 100 by the first refraction surface 110 and the second refraction surface 120 is a triangular, trapezoidal or quadrilateral structure similar to a trapezoid, and the third refraction surface 130 and the fourth refraction surface 140 are formed on the light guide strip 100
  • the cross section is triangular, trapezoidal or quadrilateral structure similar to trapezoid.
  • the first side and the second side are located on opposite sides of the reference line 200, one of the two triangles is an upright triangle, and the other is an inverted triangle. Of the two quadrilaterals formed, one is a positive triangle. Vertical trapezoid, and the other inverted trapezoid.
  • the light is deflected and emitted in the same direction after being refracted by the first refraction surface 110 and the second refraction surface 120.
  • the light is deflected and emitted in the same direction after being refracted by the third refraction surface 130 and the fourth refraction surface 140, and the light is deflected and emitted in the same direction after passing through the first refraction surface.
  • the deflection direction after refracting by the first refraction surface 110 and the second refraction surface 120 is opposite to the deflection direction after being refracted by the third refraction surface 130 and the fourth refraction surface 140.
  • the third refraction surface 130 and the fourth refraction surface 140 correct the exit direction of the light after being refracted by the first refraction surface 110 or the second refraction surface 120.
  • the first refraction surface 110 and the second refraction surface 120 correct the exit direction of the light rays refracted by the third refraction surface 130 and the fourth refraction surface 140.
  • the first side and the second side are respectively located on opposite sides of the reference line 200.
  • the light refracted by the first refraction surface 110 and the second refraction surface 120, and the light refracted by the third refraction surface 130 and the fourth refraction surface 140 It is shifted in the direction of the opposite sides of the reference line 200.
  • the exit direction of the light is shifted relative to the direction of the light incident on the first refraction surface 110, and the light passes through the third refraction surface 130 and the fourth refraction surface 140. Correct the exit direction of the shifted light.
  • the exit direction of the light is shifted from the direction of the light incident on the fourth refraction surface 140, and the light passes through the second refraction surface 120 and the first refraction surface 110. Correct the emission direction of the shifted light.
  • the first side is located on the back side of the reference line 200
  • the second side is located on the front side of the reference line 200.
  • the cross section formed on the light guide strip 100 between the first refraction surface 110 and the second refraction surface 120 is an inverted triangle or An inverted trapezoid
  • the cross section formed by the third refraction surface 130 and the fourth refraction surface 140 on the light guide strip 100 is an upright triangle or an upright trapezoid. According to the law of refraction, incident light and refracted light are located on both sides of the normal.
  • the angle of refraction When light enters a medium with a high speed of light, the angle of refraction is less than the angle of incidence, and when light enters a medium with a high speed of light from a medium with a low speed of light, The angle of refraction is greater than the angle of incidence. If the light enters through the first refraction surface 110, the light is refracted by the first refraction surface 110 and the second refraction surface 120, and then the light deviates and exits in the direction of the second side, and then passes through the first refraction surface 110 and the second refraction surface 120.
  • the light refracted by the third refraction surface 130 and the fourth refraction surface 140 is shifted to the second side relative to the light incident from the first refraction surface 110, and the light emitted from the fourth refraction surface 140 is relative to the light from the first refraction surface.
  • the height of the trajectory of the light incident from a refracting surface 110 becomes higher. If the fourth refraction surface 140 is the incident surface, the light is refracted by the fourth refraction surface 140 and the third refraction surface 130, and then the light deviates and exits in the direction of the first side, and then passes through the fourth refraction surface 140, the third refraction surface 130, and the third refraction surface 130.
  • the light rays behind the second refraction surface 120 and the first refraction surface 110 have a lower moving track height relative to the light rays incident from the fourth refraction surface 140.
  • the angle formed by the intersection of the first refraction surface 110 or its extension line and the second refraction surface 120 or its extension line is ⁇
  • the third refraction surface 130 or its extension line and the fourth refraction surface 140 or The included angle formed by the intersection of the extension lines is ⁇
  • the angle difference between the included angle ⁇ and the included angle ⁇ is 0 to 20 degrees
  • the angle between the included angle ⁇ and the included angle ⁇ is preferably equal.
  • the cross section formed is an inverted triangle
  • the third refraction surface 130 or its extension line
  • the cross section formed is an erect triangle.
  • the two triangular cross-section structures are similar to two prisms. In a prism, the deflection angle is related to the refractive index of the prism, the vertex angle of the prism, and the incident 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 apex angle of the two triangles and the incident angle of the light, and because the angle ⁇ and the angle ⁇ are equal, the cross-section
  • the apex angle of the inverted triangle is the same as the apex angle of the triangle whose cross-section is upright, and it is only necessary to control the incident angle of the light to correct the offset of the light.
  • the light guide strip 100 also has a first mounting surface 150 and a second mounting surface 160.
  • the first mounting surface 150 is parallel to the second mounting surface 160.
  • the first refraction surface 110, the first mounting surface 150, and the second mounting surface 160 are parallel to each other.
  • the four-refraction surface 140 and the second mounting surface 160 are sequentially connected to form a ring structure.
  • the first mounting surface 150 and the second mounting surface 160 are respectively located on both 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.
  • the first refraction surface 110 intersects the first mounting surface 150, the angle between the first refraction surface 110 and the extension of the first mounting surface 150 is ⁇ 1, and the angle of ⁇ 1 is less than 90 degrees, Preferably it is 30 degrees to 60 degrees.
  • the angle between the incident light and the first refraction surface 110 is less than 90 degrees, preferably 30 degrees to 60 degrees .
  • the angle of refraction is less than the angle of incidence, and the propagation speed of light in the air is greater than that in the light guide.
  • the speed of propagation in bar 100 When the light enters the light guide strip 100 from the first refraction surface 110 parallel to the direction of the first mounting surface 150, the incident angle between the incident light and the normal of the first refraction surface 110 is less than 90 degrees, and the light passes through the first refraction.
  • the angle of refraction after the surface 110 is refracted is smaller than the angle of incidence, and the light can only be shifted toward the second side, so that the light after being refracted by the first refraction surface 110 shifts toward the second side relative to the incident light.
  • the movement trajectory becomes higher.
  • the angle between the first refraction surface 110 and the extension of the first installation surface 150 is limited so that the light refracted by the first refraction surface 110 will not deviate from the light guide strip 100.
  • the fourth refraction surface 140 also intersects the first mounting surface 150, the angle between the fourth refraction surface 140 and the first mounting surface 150 is ⁇ 1, and the angle of ⁇ 1 is 70 to 90 degrees. After the light passes through the first refraction surface 110 and the second refraction surface 120, the exit direction of the light deviates from the incident direction of the first refraction surface 110 and the second refraction surface 120 to the direction of the second side.
  • the exit direction of the light after the third refraction surface 130 and the fourth refraction surface 140 is shifted to the first side relative to the incident direction of the third refraction surface 130 and the fourth refraction surface 140, and exits through the third refraction surface 130
  • the exit direction of the subsequent light is slightly shifted to the direction of the second side with respect to the incident direction of the light incident on the first refraction surface 110, or approximately parallel to the incident direction of the light incident on the first refraction surface 110.
  • the angle between the fourth refracting surface 140 and the first mounting surface 150 is limited, so that the exit direction of the light after passing through the fourth refracting surface 140 is opposite.
  • the incident direction of the fourth refraction surface 140 has a small deviation to the first side direction, so that the incident direction of the light rays refracted by the fourth refraction surface 140 and the first refraction surface 110 are consistent.
  • the fourth refraction surface 140 When the fourth refraction surface 140 is the incident surface, the first refraction surface 110 is the exit 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 the above, and the principle is the same , I won’t repeat it again.
  • this embodiment also discloses a touch display device, which includes a display module (not shown in the figure), a glass screen 400, a frame 500, an infrared lamp 600, and the aforementioned guide Light strip 100.
  • the display module and the glass screen 400 are installed on the frame 500, and the display module is located on the back side of the glass screen 400.
  • the frame 500 is provided with an infrared PCB board 700 installation position, and an infrared PCB board 700 and an infrared lamp 600 are installed on the installation position. It is installed on the infrared PCB board 700, and the infrared lamp 600 is located on the front side of one side of the glass screen 400.
  • the light guide strip 100 is fixed on the frame 500, the light guide strip 100 is located on the 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 strip 100 through the first refraction surface 110, and the infrared light is emitted after being refracted by the first refraction surface 110, the second refraction surface 120, the third refraction surface 130, and the fourth refraction surface 140.
  • the height of the infrared light emitted through the fourth refraction surface 140 relative to the infrared light incident through the first refraction surface 110 is changed, so that the height of the infrared light after passing through the light guide strip 100 becomes higher, so that the infrared lamp 600 is installed It can still meet the requirements of touch writing height even when the position is very low.
  • infrared light enters the light guide strip 100 through the fourth refraction surface 140, and exits after being refracted by 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 reduces the height of the infrared light after passing through the light guide strip 100, so that the infrared lamp 600 can still receive the infrared light even when the installation position is low.
  • 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
  • An infrared lamp 600 and a light guide strip 100 are installed on 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
  • the infrared lamp 600 on the third side corresponds to the infrared lamp 600 on the fourth side
  • the first side corresponds to the third side.
  • the infrared lamps 600 on the side are infrared emitting lamps
  • the infrared lamps 600 on the second and fourth sides are infrared receiving lamps.
  • the infrared light emitted by the infrared lamp 600 on the first side passes through the light guide strip 100 and is located on the front side of the glass screen 400, and then passes through the light guide strip 100 on the second side and is received by the infrared receiver lamp on the second side.
  • the infrared light emitted by the infrared lamps 600 on the three sides passes through the light guide strip 100 and is located on the front side of the glass screen 400, and then passes through the light guide strip 100 on the fourth side and is received by the infrared receiver lamp on the fourth side.
  • a fixing groove 170 is provided on the light guide strip 100, and the frame 500 is provided with a protruding part that matches the fixing groove 170, and the light guide strip 100 passes through the fixing groove. 170 and the protruding part are fixed to the frame 500, the fixing method of the light guide strip 100 is simple, and the installation of the light guide strip 100 is convenient.
  • the light guide strip 100 is fixed between the frame 500 and the glass screen 400. After being fixed, the first mounting surface 150 of the light guide strip 100 is against the glass screen 400. There is no gap between the light guide strip 100 and the glass screen 400, and the display device is touched. External dust and the like will not enter the touch display device through the space between the light guide strip 100 and the glass screen 400, and will not affect the touch sensitivity of the touch display device due to the dust and the like.

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Abstract

Provided are a light guide strip (100) and a touch display device. The light guide strip (100) is provided with a first refracting surface (110), a second refracting surface (120), a third refracting surface (130) and a fourth refracting surface (140), wherein the second refracting surface (120) and the third refracting surface (130) are located between the first refracting surface (110) and the fourth refracting surface (140); an intersection point of the first refracting surface (110), or an extension line thereof, and the second refracting surface (120), or an extension line thereof, is located on a first side, and an intersection point of the third refracting surface (130), or an extension line thereof, and the fourth refracting surface (140), or an extension line thereof, is located on a second side; and a connecting line between the midpoint of the first refracting surface (110) and the midpoint of the fourth refracting surface (140) is taken as a reference line (200), and the first side and the second side are respectively located on two opposite sides of the reference line (200). The light guide strip (100) changes the trajectory of light rays, so that an infrared lamp (600) of a touch display device can still meet the requirements of a touch writing height under the condition where the distance between the infrared lamp and the surface of a glass screen (400) is relatively small, and the height of a frame (500) where the infrared lamp (600) is mounted can be reduced.

Description

导光条及触摸显示设备Light guide bar and touch display device
本申请要求于2019年9月17日提交至中国国家知识产权局、申请号为201921547208.X、发明名称为“导光条及触摸显示设备”的专利申请的优先权。This application claims the priority of the patent application filed to the State Intellectual Property Office of China on September 17, 2019 with the application number 201921547208.X and the invention title "light guide strip and touch display device".
技术领域Technical field
本申请涉及显示设备领域,更具体的说,是一种导光条及触摸显示设备。This application relates to the field of display devices, more specifically, a light guide bar and touch display device.
背景技术Background technique
红外触摸显示设备是一种利用X、Y方向上密布的红外线矩阵来检测并定位触摸操作的触摸设备。现有的触摸显示设备中,红外灯发射的红外光一般经过导光条位于玻璃屏的前侧,红外光经过导光条后其距离玻璃屏表面的高度基本不变,为了使经过导光条后的红外光的高度能满足在玻璃屏上的书写高度,红外灯的灯珠的中心线一般距离玻璃屏表面的距离较高,发明人在实现本发明的过程中,发现现有技术中因灯珠的中心线距离玻璃屏表面的距离较高,从而导致安装红外灯的边框距离玻璃屏表面的高度较高。An infrared touch display device is a touch device that uses a dense infrared matrix in the X and Y directions to detect and locate touch operations. In the existing touch display device, the infrared light emitted by the infrared lamp is generally located on the front side of the glass screen through the light guide strip. After the infrared light passes through the light guide strip, its height from the glass screen surface is basically unchanged. The height of the rear infrared light can meet the writing height on the glass screen. The center line of the lamp bead of the infrared lamp generally has a relatively high distance from the surface of the glass screen. In the process of realizing the present invention, the inventor found that the prior art has The distance between the center line of the lamp bead and the surface of the glass screen is relatively high, which results in a higher height of the frame for installing the infrared lamp from the surface of the glass screen.
发明内容Summary of the invention
本申请的目的在于提供一种导光条及触摸显示设备,该导光条改变了光线的轨迹,使触摸显示设备的红外灯在距离玻璃屏表面距离较低的情况下仍能满足触摸书写高度的要求,并能降低安装红外灯的边框的高度。The purpose of this application is to provide a light guide strip and a touch display device. The light guide strip changes the trajectory of light so that the infrared lamp of the touch display device can still meet the touch writing height even when the distance from the glass screen surface is low. It can reduce the height of the frame where the infrared lamp is installed.
其技术方案如下:The technical scheme is as follows:
本申请公开一种导光条。This application discloses a light guide strip.
导光条具有第一折射面、第二折射面、第三折射面及第四折射面,所述第二折射面及第三折射面位于所述第一折射面与第四折射面之间,所述第一折射面或其延长线与所述第二折射面或其延长线的交点位于第一侧,所述第三折射 面或其延长线与所述第四折射面或其延长线的交点位于第二侧,以第一折射面的中点与所述第四折射面的中点的连线为基准线,所述第一侧、所述第二侧分别位于所述基准线的相反的两侧。The light guide strip has a first refraction surface, a second refraction surface, a third refraction surface and a fourth refraction surface, the second refraction surface and the third refraction surface are located between the first refraction surface and the fourth refraction surface, The intersection of the first refraction surface or its extension line and the second refraction surface or its extension line is located on the first side, and the third refraction surface or its extension line and the fourth refraction surface or its extension line are The intersection is located on the second side, and the line connecting the midpoint of the first refraction surface and the midpoint of the fourth refraction surface is taken as the reference line, and the first side and the second side are respectively located opposite to the reference line On both sides.
所述第一侧位于所述基准线的后侧,所述第二侧位于所述基准线的前侧。The first side is located on the back side of the reference line, and the second side is located on the front side of the reference line.
所述第一折射面或其延长线与所述第二折射面或其延长线相交后形成的夹角为α,所述第三折射面或其延长线与所述第四折射面或其延长线相交后形成的夹角为β,所述夹角α与所述夹角β的角度差为0度至20度。The angle formed by the intersection of the first refraction surface or its extension line and the second refraction surface or its extension line is α, and the third refraction surface or its extension line and the fourth refraction surface or its extension The angle formed after the lines intersect is β, and the angle difference between the angle α and the angle β is 0 to 20 degrees.
所述夹角α与所述夹角β的角度相等。The angle α is equal to the angle β.
所述导光条还具有第一安装面及第二安装面,所述第一安装面、所述第二安装面分别位于所述基准线的两侧。The light guide strip further has a first mounting surface and a second mounting surface, and the first mounting surface and the second mounting surface are respectively located on both sides of the reference line.
所述第一折射面与所述第一安装面相交,所述第一折射面与所述第一安装面的延长线之间的夹角小于90度。The first refraction surface intersects the first mounting surface, and the included angle between the first refraction surface and the extension line of the first mounting surface is less than 90 degrees.
所述第一折射面与所述第一安装面的延长线之间的夹角为30度至60度。The included angle between the first refraction surface and the extension line of the first mounting surface is 30 degrees to 60 degrees.
所述第四折射面与所述第一安装面相交,所述第四折射面与所述第一安装面之间的夹角为70度至90度。The fourth refraction surface intersects the first mounting surface, and the included angle between the fourth refraction surface and the first mounting surface is 70 degrees to 90 degrees.
所述第一折射面、所述第一安装面、所述第四折射面、所述第二安装面依次相连形成一个环状结构。The first refraction surface, the first mounting surface, the fourth refraction surface, and the second mounting surface are sequentially connected to form a ring structure.
本申请还公开一种触摸显示设备。The application also discloses a touch display device.
触摸显示设备,包括显示模组、玻璃屏、边框、红外灯及如上述任一项所述的导光条,所述显示模组及所述玻璃屏安装于所述边框上,所述显示模组位于所述玻璃屏的后侧,所述红外灯固定于所述边框上,且位于所述玻璃屏的一侧边的前侧,所述导光条固定于所述边框上,所述导光条位于所述红外灯的光传输通道上,所述第一折射面靠近所述红外灯。The touch display device includes a display module, a glass screen, a frame, an infrared lamp, and the light guide strip as described above. The display module and the glass screen are installed on the frame, and the display module The group is located on the back side of the glass screen, the infrared lamp is fixed on the frame, and is located on the front side of one side of the glass screen, the light guide strip is fixed on the frame, and the guide The light bar is located on the light transmission channel of the infrared lamp, and the first refraction surface is close to the infrared lamp.
所述导光条上设有固定槽,所述边框上设有凸出部,所述凸出部与所述固 定槽相匹配,所述导光条通过所述固定槽及所述凸出部与所述边框相固定。The light guide strip is provided with a fixing groove, the frame is provided with a protruding part, the protruding part matches the fixing groove, and the light guide strip passes through the fixing groove and the protruding part Fixed with the frame.
所述导光条与所述玻璃屏相抵接。The light guide strip abuts against the glass screen.
所述边框至少具有第一侧边及第二侧边,所述第一侧边与所述第二侧边相对,所述第一侧边及所述第二侧边上均设有红外灯及导光条,所述第一侧边与所述第二侧边的红外灯相对应,所述第一侧边与所述第二侧边的其中一侧边的红外灯为红外发射灯,另一侧边的红外灯为红外接收灯。The frame has at least a first side and a second side. The first side is opposite to the second side. Both the first side and the second side are provided with infrared lamps and The light guide strip, the first side edge corresponds to the infrared lamp on the second side edge, the infrared lamp on one of the first side edge and the second side edge is an infrared emitting lamp, and the other The infrared light on one side is an infrared receiving light.
需要说明的是:It should be noted:
前述“第一、第二、第三…”仅仅是用于对于名称的区分,不代表具体的数量及顺序。The aforementioned "first, second, third..." are only used to distinguish names, and do not represent specific quantities and sequences.
前述“前侧”指触摸显示设备中显示屏前方靠近观看者的一侧,“后侧”为与“前侧”相反的另一侧;The aforementioned "front side" refers to the side of the touch display device that is close to the viewer in front of the display screen, and the "rear side" is the other side opposite to the "front side";
下面对本申请的优点或原理进行说明:The advantages or principles of this application are described below:
1、导光条包括第一折射面、第二折射面、第三折射面及第四折射面,第二折射面及第三折射面位于第一折射面与第四折射面之间。由于光线从一种介质进入到不同的另一种介质时会发生折射,若第一折射面为光线的入射面,则光线经过第一折射面进入导光条,光线经过第一折射面折射后进入导光条内部,然后光线进入第二折射面,光线经过第二折射面射出后再次发生折射,然后光线进入第三折射面,光线经过第三折射面射出后再次发生折射,然后光线进入第四折射面,光线经过第四折射面折射后从导光条内射出。光线经过第一折射面、第二折射面、第三折射面及第四折射面后光线的轨迹发生了偏移,进入第一折射面的光线与经过折射后从第四折射面射出的光线相比其光线的轨迹高度发生了改变,从导光条内射出的光线相对于射入导光条的光线其轨迹高度变高或变低。1. The light guide strip includes a first refraction surface, a second refraction surface, a third refraction surface, and a fourth refraction surface. The second refraction surface and the third refraction surface are located between the first refraction surface and the fourth refraction surface. Since light is refracted when entering a different medium from one medium, if the first refraction surface is the incident surface of the light, the light enters the light guide through the first refraction surface, and the light is refracted by the first refraction surface. Enter the light guide, then the light enters the second refraction surface, the light passes through the second refraction surface and then refracts again, then the light enters the third refraction surface, the light passes through the third refraction surface and then refracts again, and then the light enters the first refraction surface. Four refraction surfaces, the light is emitted from the light guide bar after being refracted by the fourth refraction surface. After the light passes through the first refraction surface, the second refraction surface, the third refraction surface, and the fourth refraction surface, the trajectory of the light is shifted. The light entering the first refraction surface is different from the light exiting the fourth refraction surface after being refracted. The height of the trajectory of the light is changed, and the trajectory height of the light emitted from the light guide strip becomes higher or lower than that of the light entering the light guide strip.
若第四折射面为光线的入射面,则光线经过第四折射面、第三折射面、第二折射面及第一折射面折射后从第一折射面射出,进入第四折射面的光线与经过折射后从第一折射面射出的光线相比光线的轨迹高度发生了改变,从导光条 内射出的光线相对于射入导光条的光线其轨迹高度变高或变低。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 exits from the first refraction surface, and the light entering the fourth refraction surface and After refraction, the trajectory height of the light emitted from the first refraction surface is changed compared to the trajectory height of the light, and the trajectory height of the light emitted from the light guide strip becomes higher or lower than that of the light entering the light guide strip.
第一折射面或其延长线与第二折射面或其延长线的交点位于第一侧,第三折射面或其延长线与第四折射面或其延长线的交点位于第二侧,且第一侧、第二侧分别位于基准线相反的两侧。第一折射面与第二折射面在导光条上形成截面为三角形、梯形或近似于梯形的四边形的结构,第三折射面与第四折射面在导光条上形成截面为三角形、梯形或近似于梯形的四边形结构。第一侧与第二侧分别位于基准线的相反的两侧边,形成的两个三角形中一个为正立的三角形,另一个为倒立的三角形,形成的两个四边形中,一个为正立的梯形,另一个为倒立的梯形,则光线经过第一折射面、第二折射面折射后向相同的方向偏移射出,光线经过第三折射面、第四折射面折射后向相同的方向偏移射出,且光线经过第一折射面、第二折射面折射后的偏移方向与经过第三折射面、第四折射面折射后的偏移方向相反。光线在经过导光条后光线轨迹高度发生改变的同时,第三折射面及第四折射面对经过第一折射面及第二折射面折射后的光线的出射方向进行纠偏,或第一折射面及第二折射面对经过第三折射面及第四折射面折射后的光线的出射方向进行纠偏。The intersection of the first refraction surface or its extension and the second refraction surface or its extension is on the first side, the intersection of the third refraction surface or its extension and the fourth refraction surface or its extension is on the second side, and One side and the second side are respectively located on opposite sides of the reference line. The first refraction surface and the second refraction surface form a triangular, trapezoidal or quadrilateral cross-section structure on the light guide strip, and the third refraction surface and the fourth refraction surface form a triangular, trapezoidal or trapezoidal cross-section on the light guide strip. A quadrilateral structure similar to a trapezoid. The first side and the second side are located on opposite sides of the reference line. One of the two triangles formed is an upright triangle and the other is an inverted triangle. Of the two quadrilaterals formed, one is an upright triangle. Trapezoid, the other is an inverted trapezoid, the light is deflected and emitted in the same direction after being refracted by the first and second refraction surfaces, and the light is deflected in the same direction after being refracted by the third and fourth refraction surfaces It is emitted, and the deflection direction of the light after being refracted by the first and second refraction surfaces is opposite to the deflection direction after being refracted by the third and fourth refraction surfaces. When the height of the ray trajectory changes after the light passes through the light guide strip, the third and fourth refraction surfaces correct the direction of exit 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 for correcting deviation of the exit direction of the light rays refracted by the third refraction surface and the fourth refraction surface.
2、第一侧、第二侧分别位于基准线的相反的两侧,使经过第一折射面、第二折射面折射的光线,与经过第三折射面与第四折射面折射的光线向基准线的相反的两侧的方向偏移,光线经过第一折射面、第二折射面后光线的射出方向相对于射入第一折射面的光线的方向发生偏移,光线经过第三折射面、第四折射面后对发生偏移的光线的出射方向进行纠正。或光线经过第四折射面、第三折射面后光线的射出方向相对于射入第四折射面的光线的方向发生偏移,光线经过第二折射面、第一折射面后对发生偏移的光线的出射方向进行纠正。2. The first side and the second side are respectively located on opposite sides of the reference line, so that the light refracted by the first and second refraction surface and the light refracted by the third refraction surface and the fourth refraction surface are directed to the reference The direction of the opposite sides of the line is shifted. After the light passes through the first refraction surface and the second refraction surface, the exit direction of the light is shifted relative to the direction of the light incident on the first refraction surface. The light passes through the third refraction surface, The fourth refracting surface corrects the exit direction of the shifted light. Or after the light passes through the fourth refraction surface and the third refraction surface, the exit direction of the light is shifted relative to the direction of the light entering the fourth refraction surface, and the light is shifted after passing through the second refraction surface and the first refraction surface. The direction of light emission is corrected.
3、第一侧位于基准线的后侧,第二侧位于基准线的前侧,则第一折射面与第二折射面之间在导光条上形成的截面为倒立的三角形或倒立的梯形,第三折射面与第四折射面在导光条上形成的截面为正立的三角形或正立的梯形。根据折射定律,折射光线与入射光线分别位于法线的两侧,光从光速大的介质进入光速小的介质中时,折射角小于入射角,从光速小的介质进入光速大的介质中时,折射角大于入射角。若第一折射面为入射面,则光线经过第一折射面、 第二折射面折射后光线向第二侧的方向偏移射出,经过第一折射面、第二折射面、第三折射面、第四折射面折射后的光线相对于从第一折射面射入的光线其向第二侧的方向偏移,从第四折射面射出的光线相对于从第一折射面射入的光线其运动轨迹变高。若第四折射面为入射面,则光线经过第四折射面、第三折射面折射后光线向第一侧的方向偏移射出,经过第四折射面、第三折射面、第二折射面、第一折射面后的光线相对于从第四折射面射入的光线向其运动轨迹高度变低。3. The first side is located on the back side of the reference line, and the second side is located on the front side 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. , The cross section formed by the third refraction surface and the fourth refraction surface on the light guide strip is an upright triangle or an upright trapezoid. According to the law of refraction, the refracted light and the incident light lie on both sides of the normal. When the light enters a medium with a high speed of light, the angle of refraction is less than the angle of incidence. When a medium with a low speed of light enters a medium with a high speed of light, The angle of refraction is greater than the angle of incidence. If the first refraction surface is the incident surface, the light is refracted by the first refraction surface and the second refraction surface, and then the light is deflected and emitted in the direction of the second side, and passes through the first refraction surface, the second refraction surface, the third refraction surface, The light refracted by the fourth refraction surface is shifted to the second side relative to the light incident from the first refraction surface, and the light emitted from the fourth refraction surface moves relative to the light incident from the first refraction surface. The trajectory becomes higher. If the fourth refraction surface is the incident surface, the light is refracted by the fourth refraction surface and the third refraction surface, and then the light is deflected and emitted in the direction of the first side, and passes through the fourth refraction surface, the third refraction surface, the second refraction surface, The light behind the first refracting surface has a lower height relative to the trajectory of the light incident from the fourth refracting surface.
4、第一折射面或其延长线与第二折射面或其延长线相交后,形成的截面为倒立的三角形,第三折射面或其延长线与第四折射面或其延长线相交后,形成的截面为正立的三角形,导光条具有导光作用,两个截面为三角形的结构类似于两个三棱镜,在三棱镜中,偏折角度的大小与棱镜的折射率、棱镜的顶角和入射角有关。本申请中导光条的折射率是固定的,则光线的偏折角度与两个三角形的顶角和光线的入射角度有关,夹角α与夹角β的角度相等,则截面为倒立的三角形的顶角与截面为正立的三角形的顶角的角度相同,只需要控制光线的入射角度即可对偏移的光线进行纠偏。4. After the first refraction surface or its extension line intersects with the second refraction surface or its extension line, the cross section formed is an inverted triangle. After the third refraction surface or its extension line intersects the fourth refraction surface or its extension line, The formed cross-section is an upright triangle, and the light guide strip has the function of guiding light. The structure with two triangular cross-sections is similar to two prisms. In a prism, the deflection angle is related to the refractive index of the prism, the apex angle of the prism, and the prism. The angle of incidence is related. In this application, the refractive index of the light guide strip is fixed, and the deflection angle of the light is related to the apex angle of the two triangles and the incident angle of the light. If the angle α and the angle β are equal, the cross section is an inverted triangle. The apex angle of is the same as the apex angle of a triangle whose cross-section is upright. Only the incident angle of the light needs to be controlled to correct the deviation of the offset light.
5、第一折射面与第一安装面的延长线之间的夹角小于90度,优选的为30度至60度,光线平行于第一安装面的方向从第一折射面射入导光条时,入射光线与第一折射面之间的夹角小于90度,优选的为30度至60度。由于光从一种介质进入另一种不同的介质中时会发生折射,光从光速大的介质进入光速小的介质中时,折射角小于入射角,光在空气中的传播速度大于在导光条中的传播速度。当光线平行于第一安装面的方向从第一折射面射入导光条时,入射光线与第一折射面的法线之间的入射角小于90度,光线经过第一折射面折射后的折射角小于入射角,光线只能向第二侧的方向发生偏移,使经过第一折射面折射后的光线相对于入射光线向第二侧的方向偏移,光线的运动轨迹变高,同时第一折射面与第一安装面的延长线之间的角度限制使经过第一折射面折射后的光线不会偏移出导光条。5. The angle between the first refraction surface and the extension of the first mounting surface is less than 90 degrees, preferably 30 degrees to 60 degrees, and the light is parallel to the first mounting surface and enters the light guide from the first refraction surface. In the case of striping, the angle between the incident light and the first refracting surface is less than 90 degrees, preferably 30 degrees to 60 degrees. Since light is refracted when entering a different medium from one medium, when light enters a medium with a high speed of light into a medium with a low speed of light, the angle of refraction is less than the angle of incidence, and the propagation speed of light in the air is greater than that in the light guide. The speed of propagation in the bar. When the light enters the light guide from the first refraction surface parallel to the direction of the first mounting surface, the incident angle between the incident light and the normal of the first refraction surface is less than 90 degrees, and the light is refracted by the first refraction surface. The angle of refraction is smaller than the angle of incidence, and the light can only be shifted toward the second side, so that the light refracted by the first refraction surface shifts toward the second side with respect to the incident light, and the trajectory of the light becomes higher. The angle between the first refraction surface and the extension line of the first installation surface is limited so that the light rays refracted by the first refraction surface will not deviate from the light guide bar.
6、第四折射面与第一安装面之间的夹角为70度至90度,光线经过第一折射面、第二折射面后,光线的出射方向相对于射入第一折射面、第二折射面 的入射方向向第二侧的方向偏移,又因光线经过第三折射面及第四折射面后光线的出射方向相对于射入第三折射面、第四折射面的入射方向向第一侧的方向偏移,经过第三折射面射出后的光线的出射方向相对于射入第一折射面的光线的入射方向向第二侧的方向略微偏移,或与射入第一折射面的光线的入射方向近似平行。光从光速小的介质进入光速大的介质中时,折射角大于入射角,第四折射面与第一安装面之间的角度限制,使经过第四折射面后光线的出射方向相对于射入第四折射面的入射方向向第一侧方向偏移较小,确保经过第四折射面折射后的光线的出射方向与射入第一折射面的光线的入射方向一致。6. The angle between the fourth refraction surface and the first mounting surface is 70 degrees to 90 degrees. After the light passes through the first refraction surface and the second refraction surface, the exit direction of the light is relative to the first refraction surface and the second refraction surface. The incident direction of the two refraction surfaces is shifted to the direction of the second side, and the exit direction of the light after the light passes through the third refraction surface and the fourth refraction surface is relative to the incident direction of the third refraction surface and the fourth refraction surface. The direction of the first side is shifted, and the exit direction of the light after passing through the third refraction surface is slightly shifted to the direction of the second side with respect to the incident direction of the light entering the first refraction surface, or is different from the direction of the first refraction. The incident directions of the light rays on the surface are approximately parallel. When light enters a medium with a high speed of light from a medium with a low speed of light, the angle of refraction is greater than the angle of incidence, and the angle between the fourth refracting surface and the first mounting surface is limited, so that the exit direction of the light after passing through the fourth refracting surface is relative to the incident The incident direction of the fourth refraction surface has a small deviation to the first side direction, ensuring that the exit direction of the light rays refracted by the fourth refraction surface is consistent with the incident direction of the light rays entering the first refraction surface.
7、导光条还具有第一安装面及第二安装面,导光条通过第一安装面及第二安装面安装于触摸显示设备上。7. The light guide strip also has a first mounting surface and a second mounting surface, and the light guide strip is mounted on the touch display device through the first mounting surface and the second mounting surface.
8、导光条的第一折射面靠近红外灯,红外灯发射的红外光经过第一折射面进入导光条内部,红外光经过第一折射面、第二折射面、第三折射面及第四折射面折射后射出,经过第四折射面射出的红外光相对于经过第一折射面进入的红外光的高度发生了改变,使经过导光条后的红外光的高度变高,使红外灯在安装位置很低的情况下仍然能满足触摸书写高度的要求。或红外光经过第四折射面进入导光条,并经过第四折射面、第三折射面、第二折射面及第一折射面折射后射出,导光条改变了红外光的运动轨迹,使经过导光条后的红外光的高度降低,使红外灯在安装位置很低的情况下仍然能接收红外光。8. The first refraction surface of the light guide strip is close to the infrared lamp, the infrared light emitted by the infrared lamp enters the light guide strip through the first refraction surface, and the infrared light passes through the first refraction surface, the second refraction surface, the third refraction surface and the first refraction surface. After being refracted by the four refraction surfaces, the height of the infrared light emitted through the fourth refraction surface is changed relative to that of the infrared light entering through the first refraction surface, so that the height of the infrared light after passing through the light guide becomes higher, so that the infrared light It can still meet the requirements of touch writing height even when the installation position is very low. Or infrared light enters the light guide strip through the fourth refraction surface, and exits after being refracted by the fourth refraction surface, the third refraction surface, the second refraction surface and the first refraction surface. The light guide strip changes the movement trajectory of the infrared light to make The height of the infrared light after passing through the light guide bar is reduced, so that the infrared lamp can still receive the infrared light even when the installation position is very low.
9、导光条通过固定槽及凸出部固定于所述边框上,导光条与边框的固定方式简单,导光条的安装简单方便。9. The light guide strip is fixed on the frame through the fixing groove and the protruding part, the fixing method of the light guide strip and the frame is simple, and the installation of the light guide strip is simple and convenient.
10、导光条与玻璃屏相抵接,导光条与玻璃屏之间不存在间隙,触摸显示设备外部的粉尘等不会通过导光条与玻璃屏之间进入触摸显示设备内部,不会因粉尘等进入对触摸显示设备的触摸感应造成影响。10. The light guide strip is in contact with the glass screen. There is no gap between the light guide strip and the glass screen. Dust outside the touch display device will not enter the touch display device through the light guide strip and the glass screen. The entry of dust, etc., affects the touch sensitivity of the touch display device.
11、边框具有相对的第一侧边及第二侧边,且其中一侧边的红外灯为红外发射灯,另一侧边的红外灯为红外接收灯,一侧边的红外发射灯发射的红外光经过导光条后位于玻璃屏前侧,然后红外光经过另一侧边的导光条后由红外接收灯接收,实现红外接收灯在安装位置很低的情况下仍然能满足触摸书写要求。11. The frame has opposite first and second sides, and the infrared lamp on one side is an infrared emitting lamp, the infrared lamp on the other side is an infrared receiving lamp, and the infrared emitting lamp on one side emits The infrared light is located on the front side of the glass screen after passing through the light guide strip, and then the infrared light is received by the infrared receiving lamp after passing through the light guide strip on the other side, so that the infrared receiving lamp can still meet the requirements of touch writing even when the installation position is very low. .
附图说明Description of the drawings
图1是本实施例的触摸显示设备的局部剖视图示意图;FIG. 1 is a schematic diagram of a partial cross-sectional view of the touch display device of this embodiment;
图2是本实施例的导光条的局部立体图;Figure 2 is a partial perspective view of the light guide strip of this embodiment;
图3是本实施例的导光条的剖视图;Figure 3 is a cross-sectional view of the light guide strip of this embodiment;
图4是本实施例光线进入导光条的光线轨迹示意图;4 is a schematic diagram of the light trajectory of the light entering the light guide strip in this embodiment;
附图标记说明:Description of reference signs:
100、导光条;110、第一折射面;120、第二折射面;130、第三折射面;140、第四折射面;150、第一安装面;160、第二安装面;200、基准线;400、玻璃屏;500、边框;600、红外灯;700、红外PCB板;170、固定槽。100. Light guide strip; 110, first refraction surface; 120, second refraction surface; 130, third refraction surface; 140, fourth refraction surface; 150, first mounting surface; 160, second mounting surface; 200, Baseline; 400, glass screen; 500, frame; 600, infrared lamp; 700, infrared PCB board; 170, fixed slot.
具体实施方式detailed description
下面对本申请的实施例进行详细说明。The embodiments of the present application will be described in detail below.
如图2所示,本实施例公开一种导光条100,该导光条100具有第一折射面110、第二折射面120、第三折射面130及第四折射面140,其中第二折射面120及第三折射面130位于第一折射面110与第四折射面140之间。第一折射面110或其延长线与第二折射面120或其延长线的交点位于第一侧,第三折射面130或其延长线与第四折射面140或其延长线的交点位于第二侧,如图3所示,以第一折射面110的中点与第四折射面140的中点的连线为基准线200,第一侧、第二侧分别位于基准线200的相反的两侧。As shown in FIG. 2, this 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. The refraction surface 120 and the third refraction surface 130 are located between the first refraction surface 110 and the fourth refraction surface 140. The intersection of the first refractive surface 110 or its extension and the second refractive surface 120 or its extension is located on the first side, and the intersection of the third refractive surface 130 or its extension and the fourth refractive surface 140 or its extension is located on the second side. 3, the line connecting the midpoint of the first refraction surface 110 and the midpoint of the fourth refraction surface 140 is taken as the reference line 200, and the first side and the second side are respectively located on opposite sides of the reference line 200. side.
由于光线从一种介质进入到不同的另一种介质时会发生折射,若第一折射面110为光线的入射面,则光线经过第一折射面110进入导光条100,光线经过第一折射面110折射后进入导光条100内部,然后光线进入第二折射面120,光线经过第二折射面120射出后再次发生折射,然后光线进入第三折射面130,光线经过第三折射面130射出后再次发生折射,然后光线进入第四折射面140, 光线经过第四折射面140折射后从导光条100内射出。光线经过第一折射面110、第二折射面120、第三折射面130及第四折射面140后光线的轨迹发生了偏移,进入第一折射面110的光线与经过折射后从第四折射面140射出的光线相比其光线的轨迹高度发生了改变,从导光条100内射出的光线相对于射入导光条100的光线其轨迹高度变高或变低。Since light is refracted when entering a different medium from one medium, if the first refraction surface 110 is the incident surface of the light, the light enters the light guide 100 through the first refraction surface 110, and the light passes through the first refraction. The surface 110 enters the light guide strip 100 after being refracted, then the light enters the second refraction surface 120, the light passes through the second refraction surface 120 and then refracts again, then the light enters the third refraction surface 130, and the light exits through the third refraction surface 130 After that, it is refracted again, and then the light enters the fourth refraction surface 140, and the light is refracted by the fourth refraction surface 140 and then exits the light guide strip 100. After the light passes through the first refraction surface 110, the second refraction surface 120, the third refraction surface 130, and the fourth refraction surface 140, the trajectory of the light is shifted. The light entering the first refraction surface 110 is different from the fourth refraction after being refracted. The light rays emitted from the surface 140 have a different trajectory height compared to the light rays. The light rays emitted from the light guide strip 100 have higher or lower trajectory heights relative to the light rays incident on the light guide strip 100.
若第四折射面140为光线的入射面,则光线经过第四折射面140、第三折射面130、第二折射面120及第一折射面110折射后从第一折射面110射出。进入第四折射面140的光线与经过折射后从第一折射面110射出的光线相比光线的轨迹高度发生了改变,从导光条100内射出的光线相对于射入导光条100的光线其轨迹高度变高或变低。If the fourth refraction surface 140 is the 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 the first refraction surface 110. The trajectory height of the light entering the fourth refraction surface 140 and the light exiting the first refraction surface 110 after being refracted has changed. The light exiting from the light guide strip 100 is relative to the light entering the light guide strip 100. The height of its trajectory becomes higher or lower.
第一折射面110与第二折射面120在导光条100上形成的截面为三角形、梯形或近似于梯形的四边形结构,第三折射面130与第四折射面140在导光条100上形成截面为三角形、梯形或近似于梯形的四边形结构。又因第一侧、第二侧分别位于基准线200的相反的两侧,两个三角形其中一个为正立的三角形,则另一个的为倒立的三角形,形成的两个四边形中,一个为正立的梯形,另一个为倒立的梯形。The cross section formed on the light guide strip 100 by the first refraction surface 110 and the second refraction surface 120 is a triangular, trapezoidal or quadrilateral structure similar to a trapezoid, and the third refraction surface 130 and the fourth refraction surface 140 are formed on the light guide strip 100 The cross section is triangular, trapezoidal or quadrilateral structure similar to trapezoid. Also, because the first side and the second side are located on opposite sides of the reference line 200, one of the two triangles is an upright triangle, and the other is an inverted triangle. Of the two quadrilaterals formed, one is a positive triangle. Vertical trapezoid, and the other inverted trapezoid.
光线经过第一折射面110、第二折射面120折射后向相同的方向偏移射出,光线经过第三折射面130、第四折射面140折射后向相同的方向偏移射出,且光线经过第一折射面110、第二折射面120折射后的偏移方向与经过第三折射面130、第四折射面140折射后的偏移方向相反。光线在经过导光条100后光线轨迹高度发生改变的同时,第三折射面130及第四折射面140对经过第一折射面110或第二折射面120折射后的光线的出射方向进行纠偏,或第一折射面110及第二折射面120对经过第三折射面130及第四折射面140折射后的光线的出射方向进行纠偏。The light is deflected and emitted in the same direction after being refracted by the first refraction surface 110 and the second refraction surface 120. The light is deflected and emitted in the same direction after being refracted by the third refraction surface 130 and the fourth refraction surface 140, and the light is deflected and emitted in the same direction after passing through the first refraction surface. The deflection direction after refracting by the first refraction surface 110 and the second refraction surface 120 is opposite to the deflection direction after being refracted by the third refraction surface 130 and the fourth refraction surface 140. While the height of the ray trajectory changes after the light passes through the light guide strip 100, the third refraction surface 130 and the fourth refraction surface 140 correct the exit direction of the light after being refracted by the first refraction surface 110 or the second refraction surface 120. Or the first refraction surface 110 and the second refraction surface 120 correct the exit direction of the light rays refracted by the third refraction surface 130 and the fourth refraction surface 140.
第一侧、第二侧分别位于基准线200的相反的两侧,经过第一折射面110、第二折射面120折射的光线,与经过第三折射面130与第四折射面140折射的光线向基准线200的相反的两侧边的方向偏移。光线经过第一折射面110、第二折射面120后光线的射出方向相对于射入第一折射面110的光线的方向发生 偏移,光线经过第三折射面130、第四折射面140后对发生偏移的光线的出射方向进行纠正。或光线经过第四折射面140、第三折射面130后光线的出射方向相对于射入第四折射面140的光线的方向发生偏移,光线经过第二折射面120、第一折射面110后对发生偏移的光线的出射方向进行纠正。The first side and the second side are respectively located on opposite sides of the reference line 200. The light refracted by the first refraction surface 110 and the second refraction surface 120, and the light refracted by the third refraction surface 130 and the fourth refraction surface 140 It is shifted in the direction of the opposite sides of the reference line 200. After the light passes through the first refraction surface 110 and the second refraction surface 120, the exit direction of the light is shifted relative to the direction of the light incident on the first refraction surface 110, and the light passes through the third refraction surface 130 and the fourth refraction surface 140. Correct the exit direction of the shifted light. Or after the light passes through the fourth refraction surface 140 and the third refraction surface 130, the exit direction of the light is shifted from the direction of the light incident on the fourth refraction surface 140, and the light passes through the second refraction surface 120 and the first refraction surface 110. Correct the emission direction of the shifted light.
第一侧位于基准线200的后侧,第二侧位于基准线200的前侧,则第一折射面110与第二折射面120之间在导光条100上形成的截面为倒立的三角形或倒立的梯形,第三折射面130与第四折射面140在导光条100上形成的截面为正立的三角形或正立的梯形。根据折射定律,入射光线与折射光线分别位于法线的两侧,光从光速大的介质进入光速小的介质中时,折射角小于入射角,从光速小的介质进入光速大的介质中时,折射角大于入射角。若光线经过第一折射面110射入,则光线经过第一折射面110、第二折射面120折射后光线向第二侧的方向偏移射出,经过第一折射面110、第二折射面120、第三折射面130、第四折射面140折射后的光线相对于从第一折射面110射入的光线向第二侧的方向偏移,从第四折射面140射出的光线相对于从第一折射面110射入的光线其运动轨迹高度变高。若第四折射面140为入射面,则光线经过第四折射面140、第三折射面130折射后光线向第一侧的方向偏移射出,经过第四折射面140、第三折射面130、第二折射面120、第一折射面110后的光线相对于从第四折射面140射入的光线其运动轨迹高度变低。The first side is located on the back side of the reference line 200, and the second side is located on the front side of the reference line 200. The cross section formed on the light guide strip 100 between the first refraction surface 110 and the second refraction surface 120 is an inverted triangle or An inverted trapezoid, the cross section formed by the third refraction surface 130 and the fourth refraction surface 140 on the light guide strip 100 is an upright triangle or an upright trapezoid. According to the law of refraction, incident light and refracted light are located on both sides of the normal. When light enters a medium with a high speed of light, the angle of refraction is less than the angle of incidence, and when light enters a medium with a high speed of light from a medium with a low speed of light, The angle of refraction is greater than the angle of incidence. If the light enters through the first refraction surface 110, the light is refracted by the first refraction surface 110 and the second refraction surface 120, and then the light deviates and exits in the direction of the second side, and then passes through the first refraction surface 110 and the second refraction surface 120. The light refracted by the third refraction surface 130 and the fourth refraction surface 140 is shifted to the second side relative to the light incident from the first refraction surface 110, and the light emitted from the fourth refraction surface 140 is relative to the light from the first refraction surface. The height of the trajectory of the light incident from a refracting surface 110 becomes higher. If the fourth refraction surface 140 is the incident surface, the light is refracted by the fourth refraction surface 140 and the third refraction surface 130, and then the light deviates and exits in the direction of the first side, and then passes through the fourth refraction surface 140, the third refraction surface 130, and the third refraction surface 130. The light rays behind the second refraction surface 120 and the first refraction surface 110 have a lower moving track height relative to the light rays incident from the fourth refraction surface 140.
如图3所示,第一折射面110或其延长线与第二折射面120或其延长线相交后形成的夹角为α,第三折射面130或其延长线与第四折射面140或其延长线相交后形成的夹角为β,夹角α与夹角β的角度差为0度至20度,优选的夹角α与夹角β的角度相等。As shown in FIG. 3, the angle formed by the intersection of the first refraction surface 110 or its extension line and the second refraction surface 120 or its extension line is α, and the third refraction surface 130 or its extension line and the fourth refraction surface 140 or The included angle formed by the intersection of the extension lines is β, and the angle difference between the included angle α and the included angle β is 0 to 20 degrees, and the angle between the included angle α and the included angle β is preferably equal.
在本实施例中,第一折射面110或其延长线与第二折射面120或其延长线相交后,形成的截面为倒立的三角形,第三折射面130或其延长线及第四折射面140或其延长线相交后,形成的截面为正立的三角形。两个截面为三角形的结构类似于两个三棱镜,在三棱镜中,偏折角度的大小与棱镜的折射率、棱镜的顶角和入射角度有关。本实施例中的导光条100的折射率是固定的,光线的偏折角度与两个三角形的顶角和光线的入射角度有关,又因夹角α与夹角β的 角度相等,则截面为倒立的三角形的顶角与截面为正立的三角形的顶角的角度相同,只需要控制光线的入射角度即可对偏移的光线进行纠偏。In this embodiment, after the first refraction surface 110 or its extension line intersects the second refraction surface 120 or its extension line, the cross section formed is an inverted triangle, the third refraction surface 130 or its extension line, and the fourth refraction surface After 140 or its extension lines intersect, the cross section formed is an erect triangle. The two triangular cross-section structures are similar to two prisms. In a prism, the deflection angle is related to the refractive index of the prism, the vertex angle of the prism, and the incident 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 apex angle of the two triangles and the incident angle of the light, and because the angle α and the angle β are equal, the cross-section The apex angle of the inverted triangle is the same as the apex angle of the triangle whose cross-section is upright, and it is only necessary to control the incident angle of the light to correct the offset of the light.
如图4所示,导光条100还具有第一安装面150及第二安装面160,第一安装面150与第二安装面160平行,第一折射面110、第一安装面150、第四折射面140、第二安装面160依次相连形成一个环状结构。第一安装面150、第二安装面160分别位于基准线200的两侧,导光条100通过第一安装面150及第二安装面160安装于触摸显示设备或其它设备上。As shown in FIG. 4, the light guide strip 100 also has a first mounting surface 150 and a second mounting surface 160. The first mounting surface 150 is parallel to the second mounting surface 160. The first refraction surface 110, the first mounting surface 150, and the second mounting surface 160 are parallel to each other. The four-refraction surface 140 and the second mounting surface 160 are sequentially connected to form a ring structure. The first mounting surface 150 and the second mounting surface 160 are respectively located on both 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.
其中,参照图4所示,第一折射面110与第一安装面150相交,第一折射面110与第一安装面150的延长线之间的夹角为α1,α1的角度小于90度,优选的为30度至60度。当光线平行于第一安装面150的方向从第一折射面110射入导光条100时,入射光线与第一折射面110之间的夹角小于90度,优选的为30度至60度。由于光从一种介质进入另一种不同的介质中时会发生折射,光从光速大的介质进入光速小的介质中时,折射角小于入射角,光在空气中的传播速度大于在导光条100中的传播速度。当光线平行于第一安装面150的方向从第一折射面110射入导光条100时,入射光线与第一折射面110的法线之间的入射角小于90度,光线经过第一折射面110折射后的折射角小于入射角,光线只能向第二侧的方向发生偏移,使经过第一折射面110折射后的光线相对于入射光线向第二侧的方向偏移,光线的运动轨迹变高。同时第一折射面110与第一安装面150的延长线之间的角度限制使经过第一折射面110折射后的光线不会偏移出导光条100。4, the first refraction surface 110 intersects the first mounting surface 150, the angle between the first refraction surface 110 and the extension of the first mounting surface 150 is α1, and the angle of α1 is less than 90 degrees, Preferably it is 30 degrees to 60 degrees. When the light enters the light guide strip 100 from the first refraction surface 110 in a direction parallel to the first mounting surface 150, the angle between the incident light and the first refraction surface 110 is less than 90 degrees, preferably 30 degrees to 60 degrees . Since light is refracted when entering a different medium from one medium, when light enters a medium with a high speed of light into a medium with a low speed of light, the angle of refraction is less than the angle of incidence, and the propagation speed of light in the air is greater than that in the light guide. The speed of propagation in bar 100. When the light enters the light guide strip 100 from the first refraction surface 110 parallel to the direction of the first mounting surface 150, the incident angle between the incident light and the normal of the first refraction surface 110 is less than 90 degrees, and the light passes through the first refraction. The angle of refraction after the surface 110 is refracted is smaller than the angle of incidence, and the light can only be shifted toward the second side, so that the light after being refracted by the first refraction surface 110 shifts toward the second side relative to the incident light. The movement trajectory becomes higher. At the same time, the angle between the first refraction surface 110 and the extension of the first installation surface 150 is limited so that the light refracted by the first refraction surface 110 will not deviate from the light guide strip 100.
第四折射面140也与第一安装面150相交,第四折射面140与第一安装面150之间的夹角为β1,β1的角度为70度至90度。光线经过第一折射面110、第二折射面120后,光线的出射方向相对于射入第一折射面110、第二折射面120的入射方向向第二侧的方向偏移,又因光线经过第三折射面130及第四折射面140后光线的出射方向相对于射入第三折射面130、第四折射面140的入射方向向第一侧的方向偏移,经过第三折射面130射出后的光线的出射方向相对于射入第一折射面110的光线的入射方向向第二侧的方向略微偏移,或与射入第一折射面110的光线的入射方向近似平行。光从光速小的介质进入光速大 的介质中时,折射角大于入射角,第四折射面140与第一安装面150之间的角度限制,使经过第四折射面140后光线的出射方向相对于射入第四折射面140的入射方向向第一侧方向偏移较小,确保经过第四折射面140折射后的光线与射入第一折射面110的光线的入射方向一致。The fourth refraction surface 140 also intersects the first mounting surface 150, the angle between the fourth refraction surface 140 and the first mounting surface 150 is β1, and the angle of β1 is 70 to 90 degrees. After the light passes through the first refraction surface 110 and the second refraction surface 120, the exit direction of the light deviates from the incident direction of the first refraction surface 110 and the second refraction surface 120 to the direction of the second side. The exit direction of the light after the third refraction surface 130 and the fourth refraction surface 140 is shifted to the first side relative to the incident direction of the third refraction surface 130 and the fourth refraction surface 140, and exits through the third refraction surface 130 The exit direction of the subsequent light is slightly shifted to the direction of the second side with respect to the incident direction of the light incident on the first refraction surface 110, or approximately parallel to the incident direction of the light incident on the first refraction surface 110. When light enters a medium with a high speed of light from a medium with a low speed of light, the angle of refraction is greater than the angle of incidence. The angle between the fourth refracting surface 140 and the first mounting surface 150 is limited, so that the exit direction of the light after passing through the fourth refracting surface 140 is opposite. The incident direction of the fourth refraction surface 140 has a small deviation to the first side direction, so that the incident direction of the light rays refracted by the fourth refraction surface 140 and the first refraction surface 110 are consistent.
当第四折射面140为入射面,第一折射面110为出射面,且光线平行于第一安装面150的方向射入第四折射面140时,光线的偏移方向与上述相反,原理相同,不再再次赘述。When the fourth refraction surface 140 is the incident surface, the first refraction surface 110 is the exit 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 the above, and the principle is the same , I won’t repeat it again.
如图1所示,本实施例还公开一种触摸显示设备,该触摸显示设备包括显示模组(图中未示出)、玻璃屏400、边框500、红外灯600及如上述所述的导光条100。其中显示模组及玻璃屏400安装于边框500上,显示模组位于玻璃屏400的后侧,边框500上设有红外PCB板700安装位,安装位上安装有红外PCB板700,红外灯600安装于红外PCB板700上,且红外灯600位于玻璃屏400的一侧边的前侧。As shown in FIG. 1, this embodiment also discloses a touch display device, which includes a display module (not shown in the figure), a glass screen 400, a frame 500, an infrared lamp 600, and the aforementioned guide Light strip 100. The display module and the glass screen 400 are installed on the frame 500, and the display module is located on the back side of the glass screen 400. The frame 500 is provided with an infrared PCB board 700 installation position, and an infrared PCB board 700 and an infrared lamp 600 are installed on the installation position. It is installed on the infrared PCB board 700, and the infrared lamp 600 is located on the front side of one side of the glass screen 400.
导光条100固定于边框500上,导光条100位于红外灯600的光传输通道上,第一折射面110靠近红外灯600。红外灯600发射的红外光经过第一折射面110进入导光条100内部,红外光经过第一折射面110、第二折射面120、第三折射面130及第四折射面140折射后射出,经过第四折射面140射出的红外光相对于经过第一折射面110射入的红外光的高度发生了改变,使经过导光条100后的红外光的高度变高,使红外灯600在安装位置很低的情况下仍然能满足触摸书写高度的要求。或红外光经过第四折射面140进入导光条100,并经过第四折射面140、第三折射面130、第二折射面120及第一折射面110折射后射出,导光条100改变了红外光的运动轨迹,使经过导光条100后的红外光的高度降低,使红外灯600在安装位置很低的情况下仍然能接收红外光。The light guide strip 100 is fixed on the frame 500, the light guide strip 100 is located on the 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 strip 100 through the first refraction surface 110, and the infrared light is emitted after being refracted by the first refraction surface 110, the second refraction surface 120, the third refraction surface 130, and the fourth refraction surface 140. The height of the infrared light emitted through the fourth refraction surface 140 relative to the infrared light incident through the first refraction surface 110 is changed, so that the height of the infrared light after passing through the light guide strip 100 becomes higher, so that the infrared lamp 600 is installed It can still meet the requirements of touch writing height even when the position is very low. Or infrared light enters the light guide strip 100 through the fourth refraction surface 140, and exits after being refracted by 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 reduces the height of the infrared light after passing through the light guide strip 100, so that the infrared lamp 600 can still receive the infrared light even when the installation position is low.
边框500具有第一侧边、第二侧边、第三侧边及第四侧边,第一侧边与第二侧边相对,第三侧边与第四侧边相对,第一侧边、第二侧边、第三侧边及第四侧边上均安装有红外灯600及导光条100。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 first side, An infrared lamp 600 and a light guide strip 100 are installed on the second side, the third side, and the fourth side.
第一侧边的红外灯600与第二侧边的红外灯600相对应,第三侧边的红外 灯600与第四侧边的红外灯600相对应,其中,第一侧边与第三侧边的红外灯600为红外发射灯,第二侧边与第四侧边的红外灯600为红外接收灯。第一侧边的红外灯600发射的红外光经过导光条100后位于玻璃屏400的前侧,然后经过第二侧边的导光条100后由第二侧边的红外接收灯接收,第三侧边的红外灯600发射的红外光经过导光条100后位于玻璃屏400的前侧,然后经过第四侧边的导光条100后由第四侧边的红外接收灯接收。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. The first side corresponds to the third side. The infrared lamps 600 on the side are infrared emitting lamps, and the infrared lamps 600 on the second and fourth sides are infrared receiving lamps. The infrared light emitted by the infrared lamp 600 on the first side passes through the light guide strip 100 and is located on the front side of the glass screen 400, and then passes through the light guide strip 100 on the second side and is received by the infrared receiver lamp on the second side. The infrared light emitted by the infrared lamps 600 on the three sides passes through the light guide strip 100 and is located on the front side of the glass screen 400, and then passes through the light guide strip 100 on the fourth side and is received by the infrared receiver lamp on the fourth side.
为了实现导光条100与边框500的固定,在导光条100上设有固定槽170,边框500上设有凸出部,凸出部与固定槽170相匹配,导光条100通过固定槽170及凸出部与边框500相固定,导光条100的固定方式简单,且导光条100安装方便。In order to realize the fixing of the light guide strip 100 and the frame 500, a fixing groove 170 is provided on the light guide strip 100, and the frame 500 is provided with a protruding part that matches the fixing groove 170, and the light guide strip 100 passes through the fixing groove. 170 and the protruding part are fixed to the frame 500, the fixing method of the light guide strip 100 is simple, and the installation of the light guide strip 100 is convenient.
导光条100固定于边框500与玻璃屏400之间,固定后导光条100的第一安装面150与玻璃屏400相抵,导光条100与玻璃屏400之间不存在间隙,触摸显示设备外部的粉尘等不会通过导光条100与玻璃屏400之间进入触摸显示设备内部,不会因粉尘等进入对触摸显示设备的触摸感应造成影响。The light guide strip 100 is fixed between the frame 500 and the glass screen 400. After being fixed, the first mounting surface 150 of the light guide strip 100 is against the glass screen 400. There is no gap between the light guide strip 100 and the glass screen 400, and the display device is touched. External dust and the like will not enter the touch display device through the space between the light guide strip 100 and the glass screen 400, and will not affect the touch sensitivity of the touch display device due to the dust and the like.
以上仅为本申请的具体实施例,并不以此限定本申请的保护范围;在不违反本申请构思的基础上所作的任何替换与改进,均属本申请的保护范围。The above are only specific examples of this application, and do not limit the scope of protection of this application; any replacements and improvements made on the basis of not violating the concept of this application belong to the scope of protection of this application.

Claims (13)

  1. 导光条,其中,具有第一折射面、第二折射面、第三折射面及第四折射面,所述第二折射面及第三折射面位于所述第一折射面与第四折射面之间,所述第一折射面或其延长线与所述第二折射面或其延长线的交点位于第一侧,所述第三折射面或其延长线与所述第四折射面或其延长线的交点位于第二侧,以第一折射面的中点与所述第四折射面的中点的连线为基准线,所述第一侧、所述第二侧分别位于所述基准线的相反的两侧。The light guide strip has 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 on the first refraction surface and the fourth refraction surface In between, the intersection of the first refraction surface or its extension and the second refraction surface or its extension is on the first side, and the third refraction surface or its extension and the fourth refraction surface or its extension The intersection of the extension line is located on the second side, and the line connecting the midpoint of the first refraction surface and the midpoint of the fourth refraction surface is taken as the reference line, and the first side and the second side are respectively located on the reference Opposite sides of the line.
  2. 如权利要求1所述导光条,其中,所述第一侧位于所述基准线的后侧,所述第二侧位于所述基准线的前侧。The light guide strip according to claim 1, wherein the first side is located on the back side of the reference line, and the second side is located on the front side of the reference line.
  3. 如权利要求1所述导光条,其中,所述第一折射面或其延长线与所述第二折射面或其延长线相交后形成的夹角为α,所述第三折射面或其延长线与所述第四折射面或其延长线相交后形成的夹角为β,所述夹角α与所述夹角β的角度差为0度至20度。The light guide strip according to claim 1, wherein the angle formed by the intersection of the first refraction surface or its extension and the second refraction surface or its extension is α, and the third refraction surface or its extension The angle formed by the extension line and the fourth refraction surface or the extension line thereof is β, and the angle difference between the angle α and the angle β is 0 to 20 degrees.
  4. 如权利要求3所述导光条,其中,所述夹角α与所述夹角β的角度相等。5. The light guide strip of claim 3, wherein the angle α is equal to the angle β.
  5. 如权利要求1至4任一项所述导光条,其中,所述导光条还具有第一安装面及第二安装面,所述第一安装面、所述第二安装面分别位于所述基准线的两侧。The light guide strip according to any one of claims 1 to 4, wherein the light guide strip further has a first mounting surface and a second mounting surface, and the first mounting surface and the second mounting surface are respectively located at the The two sides of the reference line.
  6. 如权利要求5所述导光条,其中,所述第一折射面与所述第一安装面相交,所述第一折射面与所述第一安装面的延长线之间的夹角小于90度。5. The light guide strip according to claim 5, wherein the first refraction surface intersects the first mounting surface, and the included angle between the first refraction surface and the extension line of the first mounting surface is less than 90 degree.
  7. 如权利要求6所述导光条,其中,所述第一折射面与所述第一安装面的延长线之间的夹角为30度至60度。7. The light guide strip of claim 6, wherein the angle between the first refraction surface and the extension line of the first mounting surface is 30 degrees to 60 degrees.
  8. 如权利要求5所述导光条,其中,所述第四折射面与所述第一安装面相交,所述第四折射面与所述第一安装面之间的夹角为70度至90度。5. The light guide strip of claim 5, wherein the fourth refraction surface intersects the first mounting surface, and the angle between the fourth refraction surface and the first mounting surface is 70 degrees to 90 degrees degree.
  9. 如权利要求5所述导光条,其中,所述第一折射面、所述第一安装面、所述第四折射面、所述第二安装面依次相连形成一个环状结构。5. The light guide strip of claim 5, wherein the first refraction surface, the first mounting surface, the fourth refraction surface, and the second mounting surface are sequentially connected to form a ring structure.
  10. 触摸显示设备,其中,包括显示模组、玻璃屏、边框、红外灯及如权利要求1至9中任一项权利要求所述的导光条,所述显示模组及所述玻璃屏安装于所述边框上,所述显示模组位于所述玻璃屏的后侧,所述红外灯固定于所述边框上,且位于所述玻璃屏的一侧边的前侧,所述导光条固定于所述边框上,所述导光条位于所述红外灯的光传输通道上,所述第一折射面靠近所述红外灯。A touch display device, which includes a display module, a glass screen, a frame, an infrared lamp, and the light guide strip according to any one of claims 1 to 9, and the display module and the glass screen are mounted on On the frame, the display module is located on the rear side of the glass screen, the infrared lamp is fixed on the frame and located on the front side of one side of the glass screen, and the light guide strip is fixed On the frame, the light guide strip is located on the light transmission channel of the infrared lamp, and the first refraction surface is close to the infrared lamp.
  11. 如权利要求10所述触摸显示设备,其中,所述导光条上设有固定槽,所述边框上设有凸出部,所述凸出部与所述固定槽相匹配,所述导光条通过所述固定槽及所述凸出部与所述边框相固定。The touch display device according to claim 10, wherein the light guide strip is provided with a fixing groove, the frame is provided with a protruding part, the protruding part matches the fixing groove, and the light guide The strip is fixed to the frame through the fixing groove and the protruding part.
  12. 如权利要求11所述触摸显示设备,其中,所述导光条与所述玻璃屏相抵接。11. The touch display device of claim 11, wherein the light guide strip abuts the glass screen.
  13. 如权利要求10所述触摸显示设备,其中,所述边框至少具有第一侧边及第二侧边,所述第一侧边与所述第二侧边相对,所述第一侧边及所述第二侧边上均设有红外灯及导光条,所述第一侧边与所述第二侧边的红外灯相对应,所述第一侧边与所述第二侧边的其中一侧边的红外灯为红外发射灯,另一侧边的红外灯为红外接收灯。The touch display device of claim 10, wherein the frame has at least a first side and a second side, and the first side is opposite to the second side, and the first side and the second side are opposite to each other. The second side is provided with an infrared lamp and a light guide strip, the first side corresponds to the infrared lamp of the second side, and the first side and the second side are The infrared lamp on one side is an infrared emitting lamp, and the infrared lamp on the other side is an infrared receiving lamp.
PCT/CN2020/105913 2019-09-17 2020-07-30 Light guide strip and touch display device WO2021052027A1 (en)

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CN201921547208.X 2019-09-17
CN201921547208.XU CN210514678U (en) 2019-09-17 2019-09-17 Light guide strip and touch display device

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Publication number Priority date Publication date Assignee Title
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

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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
US20140185119A1 (en) * 2011-08-12 2014-07-03 Bae Systems Information And Electronic Systems Integration Inc. Ultra wide band achromatic risley prism scanner
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

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20140185119A1 (en) * 2011-08-12 2014-07-03 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

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