WO2015061985A1 - 基于全反射光波技术实现的触摸屏、触控装置及采用该触摸屏的触摸显示装置 - Google Patents

基于全反射光波技术实现的触摸屏、触控装置及采用该触摸屏的触摸显示装置 Download PDF

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Publication number
WO2015061985A1
WO2015061985A1 PCT/CN2013/086226 CN2013086226W WO2015061985A1 WO 2015061985 A1 WO2015061985 A1 WO 2015061985A1 CN 2013086226 W CN2013086226 W CN 2013086226W WO 2015061985 A1 WO2015061985 A1 WO 2015061985A1
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WO
WIPO (PCT)
Prior art keywords
light
touch
guiding device
substrate
light source
Prior art date
Application number
PCT/CN2013/086226
Other languages
English (en)
French (fr)
Inventor
李娜
Original Assignee
李娜
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 李娜 filed Critical 李娜
Priority to PCT/CN2013/086226 priority Critical patent/WO2015061985A1/zh
Publication of WO2015061985A1 publication Critical patent/WO2015061985A1/zh

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    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/24—Coupling light guides
    • G02B6/42—Coupling light guides with opto-electronic elements
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
    • G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
    • G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
    • G06F3/042—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by opto-electronic means
    • G06F3/0421—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by opto-electronic means by interrupting or reflecting a light beam, e.g. optical touch-screen
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B5/00—Optical elements other than lenses
    • G02B5/04—Prisms
    • G02B5/045—Prism arrays
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/24—Coupling light guides
    • G02B6/42—Coupling light guides with opto-electronic elements
    • G02B6/4201—Packages, e.g. shape, construction, internal or external details
    • G02B6/4204—Packages, e.g. shape, construction, internal or external details the coupling comprising intermediate optical elements, e.g. lenses, holograms
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F2203/00—Indexing scheme relating to G06F3/00 - G06F3/048
    • G06F2203/041—Indexing scheme relating to G06F3/041 - G06F3/045
    • G06F2203/04109—FTIR in optical digitiser, i.e. touch detection by frustrating the total internal reflection within an optical waveguide due to changes of optical properties or deformation at the touch location

Definitions

  • the present invention relates to a touch screen, and more particularly to a touch screen, a touch device, and a touch display device using the same according to a total reflection light wave technology.
  • the existing infrared touch system is adopted by X, Y installed along the periphery of the touch area.
  • the infrared transmitting tube and the infrared receiving tube are arranged in a uniform direction, and the infrared transmitting tube and the infrared receiving tube are driven under the control of the control and driving circuit, and the corresponding scanning forms X.
  • An infrared matrix in which the direction and the Y direction intersect horizontally and vertically.
  • the number of receiving units is halved; as in the Chinese patent application with the application number CN201020271758.6 and the invention name "a flat-screen multi-touch screen", the main principle of the invention is: adding one to the ordinary infrared touch screen
  • the light guide plate is used to fill the cavity on the touch surface of the common touch screen body, thereby achieving the effect that the surface seems to be flat; for example, 200710028616.X "An infrared touch screen and its multi-touch positioning method" and so on.
  • the basic assembly method of the infrared touch screen is to place the infrared tube on the touch surface of the touch screen.
  • the following are present.
  • the touch suspension height is high. Since the infrared light emitted from the infrared emission tube is directed to the infrared receiving tube, the infrared light is mainly concentrated in the middle of the tube. When the touch body has not touched the glass surface of the touch screen, the infrared light is actually blocked, which is a touch. In response, this phenomenon is called touch levitation height in the field. This problem affects the touch feeling and is prone to malfunction. Generally, the value is expected to be as small as possible, but the infrared touch screen body currently available on the market generally has 2- 5mm Touch the hover height.
  • the existing infrared touch screen because the infrared tube is placed on the touch surface, the external light is easily incident on the infrared receiving unit, thereby affecting the normal operation of the touch screen, so the general The screen can't work normally under strong light (such as sunlight or strong incandescent lamps).
  • the infrared tube is generally installed above the touch surface of the screen body, and the thickness of the infrared tube protection structure is added to form a higher and wider edge protrusion on the four sides of the screen body, and the touch screen is installed.
  • the design of the touch device creates a lot of limitations.
  • the infrared light emitting tubes of the conventional light wave touch screen are not disposed above the touch surface, the light emitted by the infrared emitting tube needs to be incident from the side of the touch substrate into the touch substrate, and from the opposite side of the touch substrate. The shot is received by the infrared receiving tube.
  • a wider mask structure needs to be formed on the side surface of the touch panel, resulting in a large border width of the touch display device, which is disadvantageous to the popular narrow-edge touch screen. design.
  • the invention provides a touch screen implemented based on total reflection light wave technology.
  • a touch screen implemented based on total reflection light wave technology comprising:
  • the touch substrate comprising an upper surface and a lower surface parallel to the upper surface, the upper surface being a touch surface;
  • the first light guiding device disposed under the lower surface, the first light guiding device includes a first light incident surface, a first light emitting surface, and a first reflective surface, the first light incident surface facing the touch
  • the first light-emitting surface is disposed opposite to the lower surface, and the first reflective surface is disposed closer to a center of the touch substrate than the first light-incident surface;
  • a touch light source disposed under the lower surface and adjacent to the first light guiding device, wherein the touch light source is disposed opposite to the first light incident surface;
  • the second light guiding device disposed under the lower surface, the second light guiding device includes a second light incident surface, a second light emitting surface, and a second reflective surface, the second light incident surface and the lower surface
  • the second light-emitting surface is disposed outwardly of the periphery of the touch substrate, and the second reflective surface is disposed closer to a center of the touch substrate than the second light-emitting surface;
  • the light receiver and the touch light source are respectively located below opposite sides of the touch substrate, and the light receiver and the second light emitting surface Positive setting
  • the light emitted by the touch light source enters the first light guiding device from the first light incident surface, and after being reflected by the first reflective surface, the reflected light is emitted from the first light emitting surface. And forming a touch light from the lower surface into the touch substrate; the touch light is totally reflected on the upper surface and the lower surface, so that the touch light is from the The inside of the touch substrate is transmitted to a side opposite to the touch light source, and is emitted from the lower surface to enter a second light incident surface of the second light guiding device, and is reflected by the second reflective surface
  • the second light exiting surface is incident on the light receiver.
  • the touch screen described above is implemented based on a total reflection light wave technology, which has at least the following advantages:
  • the light emitted by the touch light source of the touch screen is incident on the touch substrate, and the total reflection surface and the lower surface of the touch substrate form total reflection, and are transmitted to the light receiver, and the touch light is made by using the principle of total reflection.
  • the internal transmission of the touch substrate enables the touch body to be in close contact with the upper surface of the touch substrate to generate a touch response, which solves the problem of the touch levitation height; and, since the touch light is transmitted inside the touch screen, the touch light source does not need to be It is placed on the upper surface of the touch substrate, so that the touch screen has no convex frame and is made of a flat structure.
  • the thickness of the upper edge is generally 4-10 mm.
  • the touch screen does not need to be provided with a convex frame, which reduces the thickness of the edge of the touch screen.
  • the touch light source, the first light guiding device, the second light guiding device and the light receiver of the touch screen are located below the lower surface of the touch substrate, so that the touch light is incident from one side of the lower surface of the touch substrate. And emitting from the other opposite side of the lower surface of the touch substrate to prevent the touch light source, the first light guiding device, the second light guiding device and the light receiver from protrudingly disposed outside the periphery of the touch substrate, thereby reducing the non-perspective area
  • the width is designed to facilitate the narrow side design of the touch display device.
  • the touch light of the touch screen is transmitted inside the touch substrate, and the light is transmitted forward in a total reflection manner. Therefore, the external light hardly affects the internal touch light, and the existing Compared with the technology, the conventional light wave touch screen cannot work in a strong light environment, and the invention solves the problem of light interference of the conventional light wave touch screen. Moreover, since the touch light is transmitted inside the touch substrate, the external influence can be lowered to a low level, thereby facilitating the stability of the touch screen operation.
  • the first reflective surface is a light transmissive surface
  • the light emitted by the touch light source is incident on the first light guiding device from the first light incident surface, and in the Total reflection occurs on a reflective surface.
  • a region corresponding to the touch light source on the lower surface is formed with a light shielding layer to block light outside the touch substrate from being transmitted through the touch substrate to the touch light source. Area.
  • the first light incident surface is perpendicular to the lower surface
  • the first reflective surface is inclined relative to the lower surface
  • the first light exiting surface is parallel to the lower surface
  • the first light guiding device is a prism.
  • the first light emitting surface is disposed close to the lower surface
  • the first light-emitting surface is spaced apart from the lower surface, and an optical glue is filled between the first light-emitting surface and the lower surface, and the first light-guiding device is fixed by the optical glue.
  • the lower surface is spaced apart from the lower surface, and an optical glue is filled between the first light-emitting surface and the lower surface, and the first light-guiding device is fixed by the optical glue.
  • the touch substrate is a planar glass plate, a planar acrylic resin plate, a curved glass plate or a curved acrylic resin plate, the first light guiding device and the second
  • the material of the light guiding device is glass or resin
  • the touch light source is an infrared LED light emitting module, and the touch light source is disposed in one-to-one correspondence with the light receiver.
  • the method further includes a driving circuit board for driving the touch light source, the driving circuit board is located below the lower surface, and is spaced apart from the touch substrate, the first light guiding The device and the touch light source are sandwiched between the lower surface and the driving circuit board, and the first reflective surface is exposed outside the driving circuit board.
  • the structure of the second light guiding device is the same as that of the first light guiding device, and the second light guiding device is disposed in such a manner that the optical path of the first light guiding device is reversed.
  • the present invention also provides a touch display device using the above touch screen.
  • a touch display device includes:
  • a display screen disposed under the touch substrate and superposed with the touch screen.
  • the present invention also provides a touch device implemented based on total reflection light wave technology.
  • a touch device implemented based on total reflection light wave technology comprising:
  • the touch substrate including an upper surface and a lower surface parallel to the upper surface, the upper surface being a touch surface;
  • a first light guiding device disposed adjacent to the lower surface
  • the touch light source is disposed opposite to the first light guiding device, and the touch light source is closer to the touch substrate than the first light guiding device
  • the first light guiding device is configured to introduce light emitted by the touch light source from the lower surface into the interior of the touch substrate;
  • a second light guiding device disposed proximate to said lower surface
  • the light receiver and the touch light source are respectively located below opposite sides of the touch substrate, and the light receiver and the second light emitting surface Positively disposed; the light receiver is disposed closer to a circumference of the touch substrate than the second light guiding device;
  • the light emitted by the touch light source is incident into the first light guiding device, and after being reflected by the first light guiding device, the reflected light is in contact with the lower surface from the first light guiding device.
  • a position is introduced into the touch substrate to form a touch light; the touch light is totally reflected on the upper surface and the lower surface, so that the touch light is transmitted from the inside of the touch substrate to
  • the opposite side of the touch light source is emitted from the lower surface and introduced into the second light guiding device, and is reflected by the second light guiding device and then incident on the light receiver.
  • the first light guiding device is a prism, and includes a first light incident surface, a first light emitting surface and a first reflective surface, the first light incident surface is outward of a periphery of the touch substrate
  • the first light-emitting surface is disposed opposite to the lower surface, and the first reflective surface is disposed closer to a center of the touch substrate than the first light-incident surface; the touch light source and the first input
  • the glossy side is facing the setting.
  • the second light guiding device is a prism, and includes a second light incident surface, a second light emitting surface, and a second reflective surface, wherein the second light incident surface is opposite to the lower surface,
  • the second light-emitting surface is disposed outward of a periphery of the touch substrate, and the second light-emitting surface is disposed closer to a center of the touch substrate than the second light-emitting surface.
  • the first reflective surface is a light transmissive surface
  • the light emitted by the touch light source is incident on the first light guiding device from the first light incident surface, and in the Total reflection occurs on a reflective surface.
  • a region corresponding to the touch light source on the lower surface is formed with a light shielding layer to block light outside the touch substrate from being transmitted through the touch substrate to the touch light source. Area.
  • the first light incident surface is perpendicular to the lower surface
  • the first reflective surface is inclined relative to the lower surface
  • the first light exiting surface is parallel to the lower surface
  • the touch light source is an infrared LED light emitting module, and the touch light source is disposed in one-to-one correspondence with the light receiver.
  • the touch substrate is a planar glass plate, a planar acrylic resin plate, a curved glass plate or a curved acrylic resin plate, the first light guiding device and the second
  • the material of the light guiding device is glass or resin.
  • the method further includes a driving circuit board for driving the touch light source, the driving circuit board is located below the lower surface, and is spaced apart from the touch substrate, the first light guiding The device and the touch light source are sandwiched between the lower surface and the driving circuit board, and the first reflective surface is exposed outside the driving circuit board.
  • the structure of the second light guiding device is the same as that of the first light guiding device, and the second light guiding device is disposed in such a manner that the optical path of the first light guiding device is reversed.
  • FIG. 1 is a schematic structural diagram of a touch screen according to an embodiment of the present invention.
  • Figure 2 is an enlarged view of a portion II of Figure 1;
  • Figure 3 is an enlarged view of a portion III of Figure 1;
  • Figure 4 is an enlarged view of a portion IV of Figure 1.
  • a touch screen 100 implements touch based on a total reflection light wave technology, and the touch screen 110 can be a multi-touch screen.
  • the touch screen 100 includes a touch substrate 110 , a first light guiding device 120 , a touch light source 130 , a second light guiding device 140 , and a light receiver 150 .
  • the light emitted by the touch light source 130 is introduced into the touch substrate 110 through the first light guiding device 120 to form a touch light; the touch light is totally reflected in the touch substrate 110 and transmitted to the side where the light receiver 150 is located;
  • the touch light is emitted from the touch substrate 110 and then introduced into the light receiver 150 by the second light guiding device 140.
  • the touch substrate 110 is transparent.
  • the touch substrate 110 includes an upper surface 111 and a lower surface 113 that is parallel to the upper surface 111, and the upper surface 111 is a touch surface.
  • the touch substrate 110 may be a flat glass plate, a planar acrylic resin plate, a curved glass plate, or a curved acrylic resin plate.
  • the touch substrate 110 is a planar glass plate and has a refractive index of about 1.5.
  • the first light guiding device 120 is disposed below the lower surface 113.
  • the first light guiding device 120 includes a first light incident surface 121 , a first light emitting surface 123 , and a first reflective surface 125 .
  • the first light incident surface 121 is disposed toward the outer side of the periphery of the touch substrate 110.
  • the first light emitting surface 123 is disposed opposite to the lower surface 113 of the touch substrate 110.
  • the first reflective surface 125 is disposed closer to the center of the touch substrate 110 than the first light incident surface 121 .
  • the first light guiding device 120 is made of glass or resin.
  • the first light guiding device 120 is made of an acrylic resin having a refractive index of about 1.4.
  • the first light guiding device 120 is a right angle trapezoidal prism.
  • the top edge of the right angle trapezoidal prism is smaller than the bottom edge
  • the first light incident surface 121 is located at the right angle waist of the right angle trapezoidal prism
  • the first reflection surface 125 is located at the inclined waist side of the right angle trapezoidal prism
  • the first light exit surface 123 is located at the bottom of the right angle trapezoid prism.
  • the light emitted by the touch light source 130 is incident on the first light incident surface 121 parallel to the lower surface 113.
  • the first light guiding device 120 may also be a prism of other shapes, for example, a right triangle prism.
  • the light emitted from the first light guiding device 130 is incident from the first light incident surface 121, is totally reflected on the surface of the first reflecting surface 125, and is totally reflected again on the upper surface 111 of the touch substrate 110 through the first light emitting surface 123. Then, it is reflected again to the lower surface 113 of the touch substrate 110, and total reflection occurs again, and this is repeated.
  • the first light guiding component 120 is not limited to a transparent component, and may be a black, reddish brown or the like that can transmit infrared light.
  • the area where the light guiding device 120 and the touch light source 130 are in contact with the touch substrate 110 cannot be used as the display area.
  • the touch light source 120 has a length of 5 mm, and the light guiding device 130 is less than 10 mm, which is not more than 15 mm.
  • a light shielding layer for example, a black silk screen is formed above the partial area of the touch panel 110.
  • the first reflective surface 125 is a light transmissive surface, and the light emitted by the touch light source 130 is incident on the first light guiding device 120 from the first light incident surface 121, and total reflection occurs on the first reflective surface 125. Since the first reflective surface 125 is a light transmissive surface, which is totally reflected, the cost of the light transmissive device 120 is relatively low, and the cost of the coating is not increased, and the total reflection is 100% reflection, and the light is reflected. The loss is minimal, and the light reflected by the coating is somewhat lost.
  • the first reflective surface 125 may also be a non-transmissive surface.
  • the first reflective surface 125 may be provided with a reflective film or a reflective layer.
  • the first reflecting surface 125 is opaque, and a specific incident angle is not required, and it is convenient to adjust the incident angle.
  • a light-shielding layer is formed on the lower surface 113 of the touch substrate 110 corresponding to the touch light source 130 to block the light outside the touch substrate 110 from passing through the touch substrate 110 to the area where the touch light source 130 is located.
  • the light-shielding layer can be formed by using a silkscreen shading ink, a spray shading ink, and a light-shielding film. Since the light shielding layer can block the externally incident light, the ability to resist strong light interference can be better, and the sunlight can be resisted, so that the touch screen 100 can be used outdoors.
  • the first light incident surface 121 is perpendicular to the lower surface 113 of the touch substrate 110, and the first reflective surface 125 is inclined with respect to the lower surface 113 of the touch substrate 110.
  • the first light emitting surface 123 is parallel to the lower surface 113 of the touch substrate 110. .
  • the first light-incident surface 121 is perpendicular to the lower surface 113 of the touch substrate 110, and the first light-emitting surface 123 is parallel to the lower surface 113 of the touch substrate 110, so as to adjust the touch light to enter the touch substrate 110 through the first light-guiding device 120.
  • the angle of incidence of the time increases the accuracy of the touch.
  • the first light-emitting surface 123 is parallel to the lower surface 113 of the touch substrate 110 to reduce an angular error when light enters the touch substrate 110 from the first light guiding device 120.
  • the first light-emitting surface 123 is disposed close to the lower surface 113 of the touch substrate 110 to reduce air refraction and reflection loss when the light enters the touch substrate 110 from the first light guiding device 120.
  • the first light-emitting surface 123 is disposed in parallel with the lower surface 113 of the touch substrate 110, and the first light-emitting surface 123 and the lower surface 113 are filled with optical glue, and the first light-guiding device 120 passes through the optical glue. It is fixed to the lower surface 113. Since the first light guiding device 120 is directly fixedly connected by using an optical glue, the thinning design of the touch substrate 110 is facilitated, and the light transmitting effect of the touch screen 100 is increased.
  • the touch light source 130 is disposed below the lower surface 113 of the touch substrate 110 and adjacent to the first light guiding device 120.
  • the touch light source 130 is disposed opposite to the first light incident surface 121.
  • the touch light source 130 is disposed closer to the periphery of the touch substrate 110 than the first light guide device 120 .
  • the first light guiding device 120 is configured to introduce light emitted by the touch light source 130 from the lower surface 113 of the touch substrate 110 into the interior of the touch substrate 110 .
  • the touch light source 130 is an infrared LED light emitting module, and the touch light source 130 is disposed in one-to-one correspondence with the light receiver 150.
  • the touch screen 100 further includes a driving circuit board 160 for driving the touch light source 130.
  • the driving circuit board 160 is located below the lower surface 113 of the touch substrate 110, and is spaced apart from the touch substrate 110, and the first light guiding device 120 and The touch light source 130 is sandwiched between the lower surface 113 of the touch substrate 110 and the driving circuit board 160 , and the first reflective surface 125 is exposed outside the driving circuit board 160 .
  • the driving circuit board 160 can function to position the touch light source 130 and the first light guiding device 120, and can block light from the display screen, thereby further increasing the ability of the touch screen 100 to resist strong light interference.
  • the driving circuit board 160 since the driving circuit board 160 is disposed under the touch substrate 110, the waterproofness thereof is strong, so that the touch panel 100 can be used in an outdoor rainwater environment.
  • the second light guiding device 140 is disposed below the lower surface 113.
  • the second light guiding device 140 includes a second light incident surface 141 , a second light emitting surface 143 , and a second reflective surface 145 .
  • the second light incident surface 141 is disposed opposite to the lower surface 113.
  • the second light-emitting surface 143 is disposed toward the outer side of the periphery of the touch substrate 110.
  • the second reflecting surface 145 is disposed closer to the center of the touch substrate 110 than the second light emitting surface 143.
  • the material of the second light guiding device 140 is glass or resin.
  • the structure of the second light guiding device 140 is the same as that of the first light guiding device 120, and the second light guiding device 140 is disposed in such a manner that the optical path of the first light guiding device 120 is reversed.
  • the second light guiding device 140 is made of an acrylic resin having a refractive index of about 1.4.
  • the second light guiding device 140 is a right angle trapezoidal prism.
  • the top edge of the right angle trapezoidal prism is smaller than the bottom edge
  • the second light exit surface 143 is located at the right angle waist of the right angle trapezoidal prism
  • the second reflection surface 145 is located at the inclined waist side of the right angle trapezoidal prism
  • the second light incident surface 141 is located at the bottom of the right angle trapezoidal prism. The light illuminates the second light incident surface 141 parallel to the lower surface 113 of the touch substrate 110.
  • the second reflecting surface 145 is a light transmitting surface, and the light emitted by the touch light source 130 is incident on the second light guiding device 140 from the second light incident surface 141, and total reflection occurs on the second reflecting surface 145.
  • the second light-emitting surface 143 is perpendicular to the lower surface 113 of the touch substrate 110, the second reflective surface 145 is inclined with respect to the lower surface 113 of the touch substrate 110, and the second light-incident surface 141 is parallel to the lower surface 113 of the touch substrate 110.
  • the second light incident surface 141 is disposed in close contact with the lower surface 113 of the touch substrate 110.
  • the second light incident surface 141 is spaced apart from the lower surface 113 of the touch substrate 110, and the second light incident surface 141 and the lower surface 113 of the touch substrate 110 are filled with optical glue, and the second light guiding device 140 is optically The glue is fixed to the lower surface 113.
  • the second light guiding device 140 may also be different from the structure of the first light guiding device 120.
  • the first reflecting surface 125 of the first light guiding device 120 may be a light transmitting surface, and the second light guiding device.
  • the second reflecting surface 145 of the 140 is a non-transmissive surface;
  • the first light guiding device 120 is a right-angled trapezoidal prism made of glass, and the second light guiding device 140 may be a right-angled triangular prism made of resin.
  • the light receiver 150 is disposed below the lower surface 113 of the touch substrate 110.
  • the light receiver 150 is disposed closer to the periphery of the touch substrate 110 than the second light guiding device 140.
  • the light receiver 150 and the touch light source 130 are respectively located below opposite sides of the touch substrate 110, and the light receiver 150 is disposed opposite to the second light emitting surface 143 of the second light guiding device 140.
  • the optical receiver 150 is an infrared photo-sensing diode module.
  • the light shielding layer is also formed on the lower surface 113 of the touch substrate 110 corresponding to the light receiver 150 to block the light outside the touch substrate 110 from passing through the touch substrate 110 to the area where the light receiver 150 is located. Since the light shielding layer can block the externally incident light to better increase the ability to resist strong light interference, and can resist sunlight, the touch screen 100 can be used outdoors.
  • the touch screen 100 further includes a control circuit board 170 for controlling the light receiver 150.
  • the control circuit board 170 is located below the lower surface 113 of the touch substrate 110, and is spaced apart from the touch substrate 110, and the second light guiding device 140 and The light receiver 150 is sandwiched between the lower surface 113 of the touch substrate 110 and the control circuit board 170, and the second reflective surface 145 of the second light guiding device 140 is exposed outside the control circuit board 170.
  • the control circuit board 170 can function to position the touch light source 130 and the second light guiding device 140, and can block light from the display screen to further increase the ability of the touch screen 100 to resist strong light interference.
  • the light emitted by the touch light source 130 is incident into the first light guiding device 120, and after being reflected by the first light guiding device 120, the reflected light is reflected from the first light guiding device 120.
  • a position where the lower surface 113 of the touch substrate 110 contacts is introduced into the touch substrate 110 to form a touch light; the touch light is totally reflected on the upper surface 111 and the lower surface 113 of the touch substrate 110.
  • the touch light is transmitted from the inside of the touch substrate 110 to a side opposite to the touch light source 130, and is emitted from the lower surface 113 to be introduced into the second light guiding device 140.
  • the second light guiding device 140 reflects and then enters the light receiver 150.
  • the light emitted by the touch light source 130 enters the first light guiding device 120 from the first light incident surface 121 of the first light guiding device 120, and is reflected by the first reflecting surface 125, and the reflected light is reflected from the first light.
  • the surface 123 is emitted and is incident from the lower surface 113 of the touch substrate 110 into the touch substrate 110 to form a touch light; the touch light is totally reflected on the upper surface 111 and the lower surface 113, so that the touch light is from the touch substrate 110.
  • the inside is transmitted to the side opposite to the touch light source 130, and is emitted from the lower surface 113 of the touch substrate 110 to enter the second light incident surface 141 of the second light guiding device 140, and is reflected by the second reflecting surface 145.
  • the second light exit surface 143 is incident on the light receiver 150.
  • the light emitted by the touch light source 130 is incident on the first light guiding device 120 perpendicular to the light incident surface of the first light guiding device 120, and the light is on the first reflecting surface 125 of the first light guiding device 120.
  • the total reflection occurs, and the refractive index of the first light guiding device 120 is 1.4, wherein the critical value of the angle ⁇ 1 between the incident light and the first reflecting surface 125 satisfies the following conditions:
  • the second light guiding device 140 is identical in structure to the first light guiding device 120, and is disposed in a reversible manner in the optical path, and the second reflecting surface 145 of the second light guiding device 140 emits light.
  • the threshold value perpendicular to the second light-emitting surface 143 and the angle between the outgoing light of the second reflecting surface 145 and the second reflecting surface 145 satisfies the above condition.
  • the touch screen 100 described above is implemented based on a total reflection light wave technology, which has at least the following advantages:
  • the light emitted by the touch light source 130 of the touch panel 100 is incident on the touch substrate 110, and the upper and lower surfaces of the touch substrate 110 are totally reflected and transmitted to the light receiver 150, using the principle of total reflection.
  • the touch light is transmitted inside the touch substrate 110 such that the touch body must be in close contact with the upper surface 111 of the touch substrate 110 to generate a touch response, which solves the problem of the touch flying height; and, because the touch light is on the touch screen 100
  • the touch light source 130 does not need to be placed on the upper surface 111 of the touch substrate 110, so that the touch screen 100 has no convex frame and has a flat structure.
  • the thickness of the upper edge is generally 4-10 mm, and the touch screen 110 needs to be provided with a convex frame, which reduces the thickness of the edge of the entire touch screen.
  • the touch light source 130, the first light guiding device 120, the second light guiding device 140, and the light receiver 150 of the touch panel 100 are all located below the lower surface 113 of the touch substrate 110, so that the touch light is from the touch substrate 110.
  • One side of the lower surface 113 is incident and is emitted from the other opposite side of the lower surface 113 of the touch substrate 110, thereby avoiding the touch light source 130, the first light guiding device 120, the second light guiding device 140, and the light receiver 150.
  • the protrusion is disposed outside the periphery of the touch substrate 110, thereby reducing the width of the non-perspective area to facilitate the narrow side design of the touch display device.
  • the touch light of the touch screen 100 is transmitted inside the touch substrate 110, and the light is transmitted forward in a total reflection manner. Therefore, the external light hardly affects the internal touch light.
  • the conventional light wave touch screen cannot work in a strong light environment, and the invention solves the problem of light interference of the conventional light wave touch screen.
  • the touch light is transmitted inside the touch substrate 110, the influence from the outside can be lowered to a low level, thereby facilitating the stability of the operation of the touch screen 100.
  • the present invention also provides a touch display device.
  • the touch display device includes the touch screen 100 and a display screen, and the display screen is disposed under the touch substrate 110 and disposed on the touch screen 100.
  • the structure of the touch screen can also be used as other touch devices, such as a touch panel of a notebook, a tablet, a touch button of an electronic device, etc., in this case, the touch substrate is not limited to being transparent, and It is a light guide substrate of other colors.

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Abstract

一种基于全反射光波技术实现的触摸屏，其包括：透明的触摸基板，触摸基板包括上表面及与上表面平行相对的下表面，上表面为触摸面；设于触摸基板的下表面的下方的第一导光器件；设于触摸基板的下表面的下方、并且靠近第一导光器件的触控光源；设于触摸基板的下表面的下方的第二导光器件；设于触摸基板的下表面的下方的光接收器，光接收器与触控光源分别位于触摸基板的相对两侧的下方，光接收器与第二导光器件正对设置，触控光源与第一导光器件正对设置。上述触摸屏具有不存在触摸悬浮高度、抗强光干扰的能力较强、不存在较宽和较高的边沿凸起以及利于窄边设计的优点。本发明还提供一种触控装置及采用上述触摸屏的触摸显示装置。

Description

基于全反射光波技术实现的触摸屏、触控装置及采用该触摸屏的触摸显示装置
【技术领域】
本发明涉及一种触摸屏，特别是涉及一种基于全反射光波技术实现的触摸屏、触控装置及采用该触摸屏的触摸显示装置。
【背景技术】
现有红外触摸***，其采用方式都是通过由沿着触摸区域四周安装在X、Y 方向排布均匀的红外发射管和红外接收管，在控制、驱动电路的控制下驱动红外发射管和红外接收管，对应扫描形成X 方向和Y方向横竖交叉的红外线矩阵。当有触摸时，手指或其它物体就会挡住经过该点的横竖红外线，由控制***判断出触摸点在触摸屏上的位置。
目前在红外触摸屏领域，如申请号为CN200820109789.4、发明名称为“一种应用于触摸屏上的反射镜”的中国专利申请，此发明主要目的是：利用反射原理，减少红外触摸屏上的发射和接收单元数量减半；如申请号为CN201020271758.6、发明名称为“一种纯平结构的多点触摸屏”的中国专利申请，此发明的主要原理是：在普通红外触摸屏的基础上增加了一个导光板，用于填充普通触摸屏体触摸面上的凹腔，从而达到表面看似纯平的效果；如200710028616.X 的“一种红外触摸屏及其多点触摸定位方法”等。
上述传统的红外触摸屏专利技术或产品中无论是单点还是多点红外触摸屏，其红外触摸屏的基本组装方式，都是将红外管放于触摸屏的触摸面之上，在该结构中，都存在以下三个方面的问题：
（1）触摸悬浮高度较高。由于从红外发射管发出的红外光射向红外接收管，其红外光主要集中在管子的中部，当触摸体还没触摸到触摸屏的玻璃表面时，事实上红外光已经被阻断，这是触摸已经响应，该现象在本领域内叫做触摸悬浮高度，该问题会影响触摸手感，而且容易产生误动作，一般都希望该值越小越好，但是现在市面上的红外触摸屏体一般都有2-5mm 触摸悬浮高度。
（2）抗强光干扰的能力差。现有红外触摸屏，由于红外管是放在触摸面之上，外部的光线很容易射到红外接收单元，从而影响触摸屏的正常工作，因此一般的 屏体都不能在强光（如阳光或较强的白炽灯）下正常工作。
（3）红外触摸屏触摸面的四边都存在较宽和较高的边沿凸起。在现有红外触摸屏领域，红外管一般都安装在屏体触摸面的上方，加上红外管保护结构的厚度，从而在屏体的四边形成较高和较宽的边沿凸起，对触摸屏的安装和触摸设备外观设计产生很大的限制。
另外，虽然存在一些传统的光波触摸屏的红外发射管未设于触摸面之上的，其红外发射管发出的光线需要从触摸基板的侧面入射到触摸基板内，并且从触摸基板的另一相对侧面射出，由红外接收管接收。然而，由于光线必须从触膜基板的侧面射入、射入，需要在触控面板的侧面形成较宽的遮罩结构，导致触摸显示装置的边框宽度较大，不利于现在流行的窄边触摸屏设计。
【发明内容】
本发明提供一种基于全反射光波技术实现的触摸屏。
一种基于全反射光波技术实现的触摸屏，其包括：
透明的触摸基板，所述触摸基板包括上表面及与所述上表面平行相对的下表面，所述上表面为触摸面；
设于所述下表面的下方的第一导光器件，所述第一导光器件包括第一入光面、第一出光面及第一反射面，所述第一入光面朝向所述触摸基板的周缘外侧设置，所述第一出光面与所述下表面相对设置，所述第一反射面较所述第一入光面靠近所述触摸基板的中心设置；
设于所述下表面的下方、并且靠近所述第一导光器件的触控光源，所述触控光源与所述第一入光面正对设置；
设于所述下表面的下方的第二导光器件，所述第二导光器件包括第二入光面、第二出光面及第二反射面，所述第二入光面与所述下表面相对设置，所述第二出光面朝向所述触摸基板的周缘外侧设置，所述第二反射面较所述第二出光面靠近所述触摸基板的中心设置；以及
设于所述下表面的下方的光接收器，所述光接收器与所述触控光源分别位于所述触摸基板的相对两侧的下方，并且所述光接收器与所述第二出光面正对设置；
其中，所述触控光源发射的光线从所述第一入光面进入到所述第一导光器件内，并经过所述第一反射面反射后，反射光线从所述第一出光面射出，并且从所述下表面射入到所述触摸基板内，形成触控光线；所述触控光线在所述上表面及所述下表面上发生全反射，使所述触控光线从所述触摸基板的内部传输到与所述触控光源相对的一侧，并且从所述下表面射出而进入所述第二导光器件的第二入光面，经过所述第二反射面反射后从所述第二出光面射入所述光接收器。
上述触摸屏基于全反射光波技术实现，其至少具有如下优点：
（1）上述触摸屏的触控光源发出的光射入触摸基板内，在触摸基板内部的上射面和下射面形成全反射，并传输到光接收器，利用全反射原理使触控光线在触摸基板的内部传输，使得触摸体必须紧贴在触摸基板的上表面才会产生触摸响应，解决了触摸悬浮高度的问题；并且，由于将触控光线在触摸屏的内部传输，触控光源不需要置于触摸基板的上表面上，从而实现触摸屏无凸框，做到纯平结构。另外，传统的光波触摸屏由于触控光源安放在触摸基板的上表面，因此一般上边缘的厚度都有4-10mm，然而，上述触摸屏无需设置凸框，降低了触摸屏的边缘厚度。
（2）上述触摸屏的触控光源、第一导光器件、第二导光器件及光接收器均位于触摸基板的下表面的下方，使触控光线从触摸基板的下表面的一侧射入，并从触摸基板的下表面的另一相对侧射出，避免触控光源、第一导光器件、第二导光器件及光接收器突出设置在触摸基板的周缘外侧，从而减小非透视区域的宽度，以利于触摸显示装置的窄边设计。
（3）上述触摸屏的触控光线是在触摸基板的内部传输，而且其光线在内部是以全反射的方式向前传输，因此，外部的光线很难影响到内部的触控光线，与现有技术相比，传统光波触摸屏不能在强光环境下工作，本发明解决了传统光波触摸屏的光干扰问题。并且，由于触控光线是在触摸基板的内部传输，受外部的影响可以降到很低，因此有利于提高触摸屏工作的稳定性。
在其中一个实施例中，所述第一反射面为透光面，所述触控光源发射的光线，从所述第一入光面射入所述第一导光器件，并且在所述第一反射面上发生全反射。
在其中一个实施例中，所述下表面上与所述触控光源对应的区域形成有遮光层，以阻挡所述触摸基板外部的光线透过所述触摸基板而照射到所述触控光源所在的区域。
在其中一个实施例中，所述第一入光面垂直于所述下表面，所述第一反射面相较于所述下表面倾斜，所述第一出光面平行于所述下表面。
在其中一个实施例中，所述第一导光器件为棱镜。
在其中一个实施例中，所述第一出光面紧贴所述下表面设置；
或者，所述第一出光面与所述下表面平行间隔设置，并且所述第一出光面与所述下表面之间填充有光学胶，所述第一导光器件通过所述光学胶固定在所述下表面。
在其中一个实施例中，所述触摸基板为平面形的玻璃板、平面形的亚克力树脂板、弧形的玻璃板或弧形的亚克力树脂板，所述第一导光器件及所述第二导光器件的材质为玻璃或树脂；
或/及，所述触控光源为红外LED发光模组，并且所述触控光源与所述光接收器一一对应设置。
在其中一个实施例中，还包括用于驱动所述触控光源的驱动电路板，所述驱动电路板位于所述下表面的下方，并且与所述触摸基板间隔设置，所述第一导光器件及所述触控光源夹持在所述下表面与所述驱动电路板之间，所述第一反射面外露于所述驱动电路板之外。
在其中一个实施例中，所述第二导光器件的结构与所述第一导光器件结构相同，并且所述第二导光器件按照所述第一导光器件的光路逆反的方式设置。
同时，本发明还提供一种采用上述触摸屏的触摸显示装置。
一种触摸显示装置，其包括：
上述的触摸屏；以及
设于所述触摸基板的下方、并且与所述触摸屏叠加设置的显示屏。
另外，本发明还提供一种基于全反射光波技术实现的触控装置。
一种基于全反射光波技术实现的触控装置，其包括：
导光的触摸基板，所述触摸基板包括上表面及与所述上表面平行相对的下表面，所述上表面为触摸面；
紧贴所述下表面设置的第一导光器件；
设于所述下表面的下方的触控光源，所述触控光源与所述第一导光器件正对设置，并且所述触控光源较所述第一导光器件靠近所述触摸基板的周缘设置；所述第一导光器件用于将所述触控光源发出的光线从所述下表面导入所述触摸基板的内部；
紧贴所述下表面的设置的第二导光器件；以及
设于所述下表面的下方的光接收器，所述光接收器与所述触控光源分别位于所述触摸基板的相对两侧的下方，并且所述光接收器与所述第二出光面正对设置；所述光接收器较所述第二导光器件靠近所述触摸基板的周缘设置；
其中，所述触控光源发射的光线射入到所述第一导光器件内，并经过所述第一导光器件反射后，反射光线从所述第一导光器件与所述下表面接触的位置导入所述触摸基板内，形成触控光线；所述触控光线在所述上表面及所述下表面上发生全反射，使所述触控光线从所述触摸基板的内部传输到与所述触控光源相对的一侧，并且从所述下表面射出而导入所述第二导光器件，经过所述第二导光器件反射后射入所述光接收器。
在其中一个实施例中，所述第一导光器件为棱镜，其包括第一入光面、第一出光面及第一反射面，所述第一入光面朝向所述触摸基板的周缘外侧设置，所述第一出光面与所述下表面相对设置，所述第一反射面较所述第一入光面靠近所述触摸基板的中心设置；所述触控光源与所述第一入光面正对设置。
在其中一个实施例中，所述第二导光器件为棱镜，其包括第二入光面、第二出光面及第二反射面，所述第二入光面与所述下表面相对设置，所述第二出光面朝向所述触摸基板的周缘外侧设置，所述第二反射面较所述第二出光面靠近所述触摸基板的中心设置。
在其中一个实施例中，所述第一反射面为透光面，所述触控光源发射的光线，从所述第一入光面射入所述第一导光器件，并且在所述第一反射面上发生全反射。
在其中一个实施例中，所述下表面上与所述触控光源对应的区域形成有遮光层，以阻挡所述触摸基板外部的光线透过所述触摸基板而照射到所述触控光源所在的区域。
在其中一个实施例中，所述第一入光面垂直于所述下表面，所述第一反射面相较于所述下表面倾斜，所述第一出光面平行于所述下表面。
在其中一个实施例中，所述触控光源为红外LED发光模组，并且所述触控光源与所述光接收器一一对应设置所。
在其中一个实施例中，所述触摸基板为平面形的玻璃板、平面形的亚克力树脂板、弧形的玻璃板或弧形的亚克力树脂板，所述第一导光器件及所述第二导光器件的材质为玻璃或树脂。
在其中一个实施例中，还包括用于驱动所述触控光源的驱动电路板，所述驱动电路板位于所述下表面的下方，并且与所述触摸基板间隔设置，所述第一导光器件及所述触控光源夹持在所述下表面与所述驱动电路板之间，所述第一反射面外露于所述驱动电路板之外。
在其中一个实施例中，所述第二导光器件的结构与所述第一导光器件结构相同，并且所述第二导光器件按照所述第一导光器件的光路逆反的方式设置。
【附图说明】
图1为本发明实施方式的触摸屏的结构示意图；
图2为图1中II部分的放大图；
图3为图1中III部分的放大图；
图4为图1中IV部分的放大图。
【具体实施方式】
为了便于理解本发明，下面将参照相关附图对本发明进行更全面的描述。附图中给出了本发明的较佳的实施例。但是，本发明可以以许多不同的形式来实现，并不限于本文所描述的实施例。相反地，提供这些实施例的目的是使对本发明的公开内容的理解更加透彻全面。
需要说明的是，当元件被称为“固定于”另一个元件，它可以直接在另一个元件上或者也可以存在居中的元件。当一个元件被认为是“连接”另一个元件，它可以是直接连接到另一个元件或者可能同时存在居中元件。本文所使用的术语“垂直的”、“水平的”、“左”、“右”以及类似的表述只是为了说明的目的。
除非另有定义，本文所使用的所有的技术和科学术语与属于本发明的技术领域的技术人员通常理解的含义相同。本文中在本发明的说明书中所使用的术语只是为了描述具体的实施例的目的，不是旨在于限制本发明。本文所使用的术语“及／或”包括一个或多个相关的所列项目的任意的和所有的组合。
请参阅图1，本发明的一实施方式的触摸屏100，其基于全反射光波技术实现触控，该触摸屏110可以为多点触摸屏。该触摸屏100包括触摸基板110、第一导光器件120、触控光源130、第二导光器件140以及光接收器150。触控光源130发射的光线，经过第一导光器件120导入到触摸基板110内，形成触控光线；触控光线在触摸基板110内发生全反射而传输到光接收器150所在的一侧；触控光线从触摸基板110射出后，由第二导光器件140导入光接收器150内。当物体在触膜基板110的触摸面上触摸时，会破坏触摸面的全反射，从而使与触摸位置对应的光接收器150无法接受到触控光线，即而得知触摸位置的坐标。
触摸基板110为透明的。触摸基板110包括上表面111及与上表面111平行相对的下表面113，上表面111为触摸面。触摸基板110可以为平面形的玻璃板、平面形的亚克力树脂板、弧形的玻璃板或弧形的亚克力树脂板。具体在图示的实施例中，触摸基板110为平面形的玻璃板，并且其折射率约为1.5。
请一并参阅图2，第一导光器件120设于下表面113的下方。第一导光器件120包括第一入光面121、第一出光面123及第一反射面125。第一入光面121朝向触摸基板110的周缘外侧设置。第一出光面123与触摸基板110的下表面113相对设置。第一反射面125较第一入光面121靠近触摸基板110的中心设置。第一导光器件120材质为玻璃或树脂，例如，在图示的实施例中，第一导光器件120由折射率约为1.4的亚克力树脂制成。
具体在图示的实施例中，第一导光器件120为直角梯形棱镜。直角梯形棱镜的顶边小于底边，第一入光面121位于直角梯形棱镜的直角腰边，第一反射面125位于直角梯形棱镜的倾斜腰边，第一出光面123位于直角梯形棱镜的底边，触控光源130发射的光线平行于下表面113射入第一入光面121。
当然，在本发明中，第一导光器件120也可以为其他形状的棱镜，例如，直角三角形棱镜。
第一导光器件130发出的光线，从第一入光面121射入，在第一反射面125面发生全反射，透过第一出光面123在触摸基板110的上表面111再次发生全反射，继而再反射到触摸基板110的下表面113，再发生全反射，反复如此。
需要强调的是，第一导光元器件120不限于透明元器件，它可以是黑色，红褐色等可以透红外的导光器件即可。导光器件120跟触控光源130与触摸基板110接触的区域是不能作为显示区域的，例如，触控光源120采用5mm长度，导光器件130小于10mm，加起来不会大于15mm，实际应用中为了避免透过触控玻璃看到这部分结构，触控面板110的这部分区域的上方形成有遮光层（例如，黑色丝印）。
优选地，第一反射面125为透光面，触控光源130发射的光线，从第一入光面121射入第一导光器件120，并且在第一反射面125上发生全反射。由于第一反射面125为透光面，其采用全反射的方式进行反射，全透光的导光器件120成本比较低，不会增加镀膜的成本，并且全反射是100%的反射，对光的损失最小，而镀膜反射的光线多少存在光线损失。
当然，在其他实施例中，第一反射面125也可以为非透光面，例如，第一反射面125上可设有粘贴有反光膜或涂覆一层反光层。此时，第一反射面125不透光，并且无需特定的入射角，其调整入射角度较为方便。
进一步地，触摸基板110的下表面113上与触控光源130对应的区域形成有遮光层，以阻挡触摸基板110外部的光线透过触摸基板110而照射到触控光源130所在的区域。遮光层可以采用丝印遮光油墨、喷涂遮光油墨、粘贴遮光薄膜等方式形成。由于遮光层可遮挡外部射入的光线，可以更好地增加抗强光干扰的能力，并且可以抗阳光，便于户外使用该触摸屏100。
进一步地，第一入光面121垂直于触摸基板110的下表面113，第一反射面125相较于触摸基板110的下表面113倾斜，第一出光面123平行于触摸基板110的下表面113。由于第一入光面121垂直于触摸基板110的下表面113，第一出光面123平行于触摸基板110的下表面113，以便于通过第一导光器件120调整触控光线射入触摸基板110时的入射角，提高触控的精确度。并且，第一出光面123平行于触摸基板110的下表面113，以减小光线从第一导光器件120进入触摸基板110时的角度误差。
进一步地，在其中一个实施例中，第一出光面123紧贴触摸基板110的下表面113设置，以减少光线从第一导光器件120进入触摸基板110时的空气折射、反射损失。
在另外一个实施例中，第一出光面123与触摸基板110的下表面113平行间隔设置，并且第一出光面123与下表面113之间填充有光学胶，第一导光器件120通过光学胶固定在下表面113。由于采用光学胶直接固定连接第一导光器件120，以便于触摸基板110的薄型化设计，并且增大触摸屏100的透光效果。
触控光源130设于触摸基板110的下表面113的下方，并且靠近第一导光器件120。触控光源130与第一入光面121正对设置。触控光源130触控光源较所述第一导光器件120靠近所述触摸基板110的周缘设置。所述第一导光器件120用于将所述触控光源130发出的光线从所述触摸基板110的下表面113导入所述触摸基板110的内部。具体在图示的实施例中，触控光源130为红外LED发光模组，并且触控光源130与光接收器150一一对应设置。
进一步地，触摸屏100还包括用于驱动触控光源130的驱动电路板160，驱动电路板160位于触摸基板110的下表面113的下方，并且与触摸基板110间隔设置，第一导光器件120及触控光源130夹持在触摸基板110的下表面113与驱动电路板160之间，第一反射面125外露于驱动电路板160之外。驱动电路板160可以起到定位触控光源130及第一导光器件120的作用，并且可以遮挡来自于显示屏的光线，从而进一步增加触摸屏100的抗强光干扰的能力。另外，由于驱动电路板160设于触摸基板110的下方，其防水性较强，使得上述触摸屏100可以户外雨水环境下使用。
请一并参阅图3，第二导光器件140设于下表面113的下方。第二导光器件140包括第二入光面141、第二出光面143及第二反射面145。第二入光面141与下表面113相对设置。第二出光面143朝向触摸基板110的周缘外侧设置。第二反射面145较第二出光面143靠近触摸基板110的中心设置。第二导光器件140的材质为玻璃或树脂。
具体在图示的实施例中，第二导光器件140的结构与第一导光器件120结构相同，并且第二导光器件140按照第一导光器件120的光路逆反的方式设置。
换句话说，在图示的实施例中，第二导光器件140由折射率约为1.4的亚克力树脂制成。第二导光器件140为直角梯形棱镜。直角梯形棱镜的顶边小于底边，第二出光面143位于直角梯形棱镜的直角腰边，第二反射面145位于直角梯形棱镜的倾斜腰边，第二入光面141位于直角梯形棱镜的底边，光线平行于触摸基板110的下表面113射出第二入光面141。第二反射面145为透光面，触控光源130发射的光线，从第二入光面141射入第二导光器件140，并且在第二反射面145上发生全反射。第二出光面143垂直于触摸基板110的下表面113，第二反射面145相较于触摸基板110的下表面113倾斜，第二入光面141平行于触摸基板110的下表面113。第二入光面141紧贴触摸基板110的下表面113设置。或者，第二入光面141与触摸基板110的下表面113平行间隔设置，并且第二入光面141与触摸基板110的下表面113之间填充有光学胶，第二导光器件140通过光学胶固定在下表面113。
需要说明的是，第二导光器件140也可以与第一导光器件120的结构不一样，例如，第一导光器件120的第一反射面125可以为透光面，第二导光器件140的第二反射面145为非透光面；第一导光器件120为由玻璃制成的直角梯形棱镜，第二导光器件140可以为由树脂制成的直角三角形棱镜。
光接收器150设于触摸基板110的下表面113的下方。所述光接收器150较所述第二导光器件140靠近所述触摸基板110的周缘设置。光接收器150与触控光源130分别位于触摸基板110的相对两侧的下方，并且光接收器150与第二导光器件140的第二出光面143正对设置。具体在图示的实施例中，光接收器150为红外光电感应二极管模组。
进一步地，触摸基板110的下表面113上与光接收器150对应的区域也形成有该遮光层，以阻挡触摸基板110外部的光线透过触摸基板110而照射到光接收器150所在的区域。由于遮光层可遮挡外部射入的光线，以更好地增加抗强光干扰的能力，并且可以抗阳光，便于户外使用该触摸屏100。
进一步地，触摸屏100还包括用于控制光接收器150的控制电路板170，控制电路板170位于触摸基板110的下表面113的下方，并且与触摸基板110间隔设置，第二导光器件140及光接收器150夹持在触摸基板110的下表面113与控制电路板170之间，第二导光器件140的第二反射面145外露于控制电路板170之外。控制电路板170可以起到定位触控光源130及第二导光器件140的作用，并且可以遮挡来自于显示屏的光线，以进一步增加触摸屏100的抗强光干扰的能力。
其中，所述触控光源130发射的光线射入到所述第一导光器件120内，并经过所述第一导光器件120反射后，反射光线从所述第一导光器件120与所述触摸基板110的下表面113接触的位置导入所述触摸基板110内，形成触控光线；所述触控光线在所述触摸基板110的上表面111及所述下表面113上发生全反射，使所述触控光线从所述触摸基板110的内部传输到与所述触控光源130相对的一侧，并且从所述下表面113射出而导入所述第二导光器件140，经过所述第二导光器件140反射后射入所述光接收器150。
具体的，触控光源130发射的光线从第一导光器件120的第一入光面121进入到第一导光器件120内，并经过第一反射面125反射后，反射光线从第一出光面123射出，并且从触摸基板110的下表面113射入到触摸基板110内，形成触控光线；触控光线在上表面111及下表面113上发生全反射，使触控光线从触摸基板110的内部传输到与触控光源130相对的一侧，并且从触摸基板110的下表面113射出而进入第二导光器件140的第二入光面141，经过第二反射面145反射后从第二出光面143射入光接收器150。
以下举例说明上述触摸屏100的光学原理：
请再次参阅图2，当触控光源130发射的光线垂直于第一导光器件120的入光面射入第一导光器件120内，光线在第一导光器件120的第一反射面125发生全反射，第一导光器件120的折射率为1.4，其中，入射光线与第一反射面125的夹角θ1的临界值满足如下条件：
sin(90°-θ1)=1/1.4。
请再次参阅图3，同理，第二导光器件140与第一导光器件120的结构相同，并且按照光路可逆的方式设置，则第二导光器件140的第二反射面145的出射光线垂直于第二出光面143，并且第二反射面145的出射光线与第二反射面145的夹角的临界值满足上述条件。
请再次参阅图4，当触控光线在触摸基板110内进行传导时，在触摸基板110的上表面111及下表面113发生全反射，触摸基板110的折射率为1.5，其中，入射光线与触摸基板110的上表面111及下表面113的夹角θ2的临界值满足如下条件：
sin(90°-θ2)=1/1.5。
上述触摸屏100基于全反射光波技术实现，其至少具有如下优点：
（1）上述触摸屏100的触控光源130发出的光射入触摸基板110内，在触摸基板110内部的上射面和下射面形成全反射，并传输到光接收器150，利用全反射原理使触控光线在触摸基板110的内部传输，使得触摸体必须紧贴在触摸基板110的上表面111才会产生触摸响应，解决了触摸悬浮高度的问题；并且，由于将触控光线在触摸屏100的内部传输，触控光源130不需要置于触摸基板110的上表面111上，从而实现触摸屏100无凸框，做到纯平结构。另外，传统的光波触摸屏由于触控光源130安放在触摸基板110的上表面111，因此一般上边缘的厚度都有4-10mm，上述触摸屏110需设置凸框，降低了整个触摸屏的边缘厚度。
（2）上述触摸屏100的触控光源130、第一导光器件120、第二导光器件140及光接收器150均位于触摸基板110的下表面113的下方，使触控光线从触摸基板110的下表面113的一侧射入，并从触摸基板110的下表面113的另一相对侧射出，避免触控光源130、第一导光器件120、第二导光器件140及光接收器150突出设置在触摸基板110的周缘外侧，从而减小非透视区域的宽度，以利于触摸显示装置的窄边设计。
（3）上述触摸屏100的触控光线是在触摸基板110的内部传输，而且其光线在内部是以全反射的方式向前传输，因此，外部的光线很难影响到内部的触控光线，与现有技术相比，传统光波触摸屏不能在强光环境下工作，本发明解决了传统光波触摸屏的光干扰问题。并且，由于触控光线是在触摸基板110的内部传输，受外部的影响可以降到很低，因此有利于提高触摸屏100工作的稳定性。
同时，本发明还提供一种触摸显示装置。
该触摸显示装置包括上述触摸屏100以及显示屏，显示屏设于触摸基板110的下方，并且与触摸屏100叠加设置。
需要说明的是，上述触摸屏的结构也可以作为其他触控装置，例如，笔记本的触控面板、写字板、电子装置的触控按键等等，此时，触摸基板不限于为透明的，也可以为其他颜色的导光基板。
以上所述实施例仅表达了本发明的几种实施方式，其描述较为具体和详细，但并不能因此而理解为对本发明专利范围的限制。应当指出的是，对于本领域的普通技术人员来说，在不脱离本发明构思的前提下，还可以做出若干变形和改进，这些都属于本发明的保护范围。因此，本发明专利的保护范围应以所附权利要求为准。

Claims (20)

  1. 一种基于全反射光波技术实现的触摸屏，其特征在于，包括：
    透明的触摸基板，所述触摸基板包括上表面及与所述上表面平行相对的下表面，所述上表面为触摸面；
    设于所述下表面的下方的第一导光器件，所述第一导光器件包括第一入光面、第一出光面及第一反射面，所述第一入光面朝向所述触摸基板的周缘外侧设置，所述第一出光面与所述下表面相对设置，所述第一反射面较所述第一入光面靠近所述触摸基板的中心设置；
    设于所述下表面的下方、并且靠近所述第一导光器件的触控光源，所述触控光源与所述第一入光面正对设置；
    设于所述下表面的下方的第二导光器件，所述第二导光器件包括第二入光面、第二出光面及第二反射面，所述第二入光面与所述下表面相对设置，所述第二出光面朝向所述触摸基板的周缘外侧设置，所述第二反射面较所述第二出光面靠近所述触摸基板的中心设置；以及
    设于所述下表面的下方的光接收器，所述光接收器与所述触控光源分别位于所述触摸基板的相对两侧的下方，并且所述光接收器与所述第二出光面正对设置；
    其中，所述触控光源发射的光线从所述第一入光面进入到所述第一导光器件内，并经过所述第一反射面反射后，反射光线从所述第一出光面射出，并且从所述下表面射入到所述触摸基板内，形成触控光线；所述触控光线在所述上表面及所述下表面上发生全反射，使所述触控光线从所述触摸基板的内部传输到与所述触控光源相对的一侧，并且从所述下表面射出而进入所述第二导光器件的第二入光面，经过所述第二反射面反射后从所述第二出光面射入所述光接收器。
  2. 如权利要求1所述的基于全反射光波技术实现的触摸屏，其特征在于，所述第一反射面为透光面，所述触控光源发射的光线，从所述第一入光面射入所述第一导光器件，并且在所述第一反射面上发生全反射。
  3. 如权利要求1所述的基于全反射光波技术实现的触摸屏，其特征在于，所述下表面上与所述触控光源对应的区域形成有遮光层，以阻挡所述触摸基板外部的光线透过所述触摸基板而照射到所述触控光源所在的区域。
  4. 如权利要求1所述的基于全反射光波技术实现的触摸屏，其特征在于，所述第一入光面垂直于所述下表面，所述第一反射面相较于所述下表面倾斜，所述第一出光面平行于所述下表面。
  5. 如权利要求4所述的基于全反射光波技术实现的触摸屏，其特征在于，所述第一导光器件为棱镜。
  6. 如权利要求5所述的基于全反射光波技术实现的触摸屏，其特征在于，所述第一出光面紧贴所述下表面设置；
    或者，所述第一出光面与所述下表面平行间隔设置，并且所述第一出光面与所述下表面之间填充有光学胶，所述第一导光器件通过所述光学胶固定在所述下表面。
  7. 如权利要求1所述的基于全反射光波技术实现的触摸屏，其特征在于，所述触摸基板为平面形的玻璃板、平面形的亚克力树脂板、弧形的玻璃板或弧形的亚克力树脂板，所述第一导光器件及所述第二导光器件的材质为玻璃或树脂；
    或/及，所述触控光源为红外LED发光模组，并且所述触控光源与所述光接收器一一对应设置。
  8. 如权利要求1所述的基于全反射光波技术实现的触摸屏，其特征在于，还包括用于驱动所述触控光源的驱动电路板，所述驱动电路板位于所述下表面的下方，并且与所述触摸基板间隔设置，所述第一导光器件及所述触控光源夹持在所述下表面与所述驱动电路板之间，所述第一反射面外露于所述驱动电路板之外。
  9. 如权利要求1~8任一项所述的基于全反射光波技术实现的触摸屏，其特征在于，所述第二导光器件的结构与所述第一导光器件结构相同，并且所述第二导光器件按照所述第一导光器件的光路逆反的方式设置。
  10. 一种触摸显示装置，其特征在于，包括：
    如权利要求1~9任一项所述的触摸屏；以及
    设于所述触摸基板的下方、并且与所述触摸屏叠加设置的显示屏。
  11. 一种基于全反射光波技术实现的触控装置，其特征在于，包括：
    导光的触摸基板，所述触摸基板包括上表面及与所述上表面平行相对的下表面，所述上表面为触摸面；
    紧贴所述下表面设置的第一导光器件；
    设于所述下表面的下方的触控光源，所述触控光源与所述第一导光器件正对设置，并且所述触控光源较所述第一导光器件靠近所述触摸基板的周缘设置；所述第一导光器件用于将所述触控光源发出的光线从所述下表面导入所述触摸基板的内部；
    紧贴所述下表面的设置的第二导光器件；以及
    设于所述下表面的下方的光接收器，所述光接收器与所述触控光源分别位于所述触摸基板的相对两侧的下方，并且所述光接收器与所述第二出光面正对设置；所述光接收器较所述第二导光器件靠近所述触摸基板的周缘设置；
    其中，所述触控光源发射的光线射入到所述第一导光器件内，并经过所述第一导光器件反射后，反射光线从所述第一导光器件与所述下表面接触的位置导入所述触摸基板内，形成触控光线；所述触控光线在所述上表面及所述下表面上发生全反射，使所述触控光线从所述触摸基板的内部传输到与所述触控光源相对的一侧，并且从所述下表面射出而导入所述第二导光器件，经过所述第二导光器件反射后射入所述光接收器。
  12. 如权利要求11所述的基于全反射光波技术实现的触控装置，其特征在于，所述第一导光器件为棱镜，其包括第一入光面、第一出光面及第一反射面，所述第一入光面朝向所述触摸基板的周缘外侧设置，所述第一出光面与所述下表面相对设置，所述第一反射面较所述第一入光面靠近所述触摸基板的中心设置；所述触控光源与所述第一入光面正对设置。
  13. 如权利要求12所述的基于全反射光波技术实现的触控装置，其特征在于，所述第二导光器件为棱镜，其包括第二入光面、第二出光面及第二反射面，所述第二入光面与所述下表面相对设置，所述第二出光面朝向所述触摸基板的周缘外侧设置，所述第二反射面较所述第二出光面靠近所述触摸基板的中心设置。
  14. 如权利要求12所述的基于全反射光波技术实现的触控装置，其特征在于，所述第一反射面为透光面，所述触控光源发射的光线，从所述第一入光面射入所述第一导光器件，并且在所述第一反射面上发生全反射。
  15. 如权利要求12所述的基于全反射光波技术实现的触控装置，其特征在于，所述下表面上与所述触控光源对应的区域形成有遮光层，以阻挡所述触摸基板外部的光线透过所述触摸基板而照射到所述触控光源所在的区域。
  16. 如权利要求12所述的基于全反射光波技术实现的触控装置，其特征在于，所述第一入光面垂直于所述下表面，所述第一反射面相较于所述下表面倾斜，所述第一出光面平行于所述下表面。
  17. 如权利要求11所述的基于全反射光波技术实现的触控装置，其特征在于，所述触控光源为红外LED发光模组，并且所述触控光源与所述光接收器一一对应设置所。
  18. 如权利要求11所述的基于全反射光波技术实现的触控装置，其特征在于，所述触摸基板为平面形的玻璃板、平面形的亚克力树脂板、弧形的玻璃板或弧形的亚克力树脂板，所述第一导光器件及所述第二导光器件的材质为玻璃或树脂。
  19. 如权利要求11所述的基于全反射光波技术实现的触控装置，其特征在于，还包括用于驱动所述触控光源的驱动电路板，所述驱动电路板位于所述下表面的下方，并且与所述触摸基板间隔设置，所述第一导光器件及所述触控光源夹持在所述下表面与所述驱动电路板之间，所述第一反射面外露于所述驱动电路板之外。
  20. 如权利要求11所述的基于全反射光波技术实现的触控装置，其特征在于，所述第二导光器件的结构与所述第一导光器件结构相同，并且所述第二导光器件按照所述第一导光器件的光路逆反的方式设置。
PCT/CN2013/086226 2013-10-30 2013-10-30 基于全反射光波技术实现的触摸屏、触控装置及采用该触摸屏的触摸显示装置 WO2015061985A1 (zh)

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