WO2011057572A1 - Ecran tactile, système tactile et source de lumière - Google Patents

Ecran tactile, système tactile et source de lumière Download PDF

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Publication number
WO2011057572A1
WO2011057572A1 PCT/CN2010/078665 CN2010078665W WO2011057572A1 WO 2011057572 A1 WO2011057572 A1 WO 2011057572A1 CN 2010078665 W CN2010078665 W CN 2010078665W WO 2011057572 A1 WO2011057572 A1 WO 2011057572A1
Authority
WO
WIPO (PCT)
Prior art keywords
light
light guide
guide body
light source
reflecting
Prior art date
Application number
PCT/CN2010/078665
Other languages
English (en)
Chinese (zh)
Inventor
叶新林
刘建军
刘新斌
Original Assignee
北京汇冠新技术股份有限公司
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 北京汇冠新技术股份有限公司 filed Critical 北京汇冠新技术股份有限公司
Publication of WO2011057572A1 publication Critical patent/WO2011057572A1/fr

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Classifications

    • 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
    • G06F3/0428—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by opto-electronic means by sensing at the edges of the touch surface the interruption of optical paths, e.g. an illumination plane, parallel to the touch surface which may be virtual
    • 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
    • G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
    • G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
    • G02B6/0013—Means for improving the coupling-in of light from the light source into the light guide
    • G02B6/0023—Means for improving the coupling-in of light from the light source into the light guide provided by one optical element, or plurality thereof, placed between the light guide and the light source, or around the light source
    • G02B6/0025—Diffusing sheet or layer; Prismatic sheet or layer
    • 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
    • G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
    • G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
    • G02B6/0013—Means for improving the coupling-in of light from the light source into the light guide
    • G02B6/0023—Means for improving the coupling-in of light from the light source into the light guide provided by one optical element, or plurality thereof, placed between the light guide and the light source, or around the light source
    • G02B6/0028—Light guide, e.g. taper
    • 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
    • G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
    • G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
    • G02B6/0013—Means for improving the coupling-in of light from the light source into the light guide
    • G02B6/0023—Means for improving the coupling-in of light from the light source into the light guide provided by one optical element, or plurality thereof, placed between the light guide and the light source, or around the light source
    • G02B6/003—Lens or lenticular sheet or layer
    • 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
    • G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
    • G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
    • G02B6/0013—Means for improving the coupling-in of light from the light source into the light guide
    • G02B6/0023—Means for improving the coupling-in of light from the light source into the light guide provided by one optical element, or plurality thereof, placed between the light guide and the light source, or around the light source
    • G02B6/0031—Reflecting element, sheet or layer

Definitions

  • the present invention relates to photodetection technology, and more particularly to a touch screen, a touch system, and a light source. Background technique
  • one is an infrared touch screen that uses an infrared emitting and receiving tube array to form an infrared scanning grid; the other is an optical sensing unit such as a camera.
  • the optical touch screen of the sensing element is an infrared touch screen that uses an infrared emitting and receiving tube array to form an infrared scanning grid.
  • the optical sensing unit it is necessary to provide a light source in the above optical touch screen to provide detection light for the optical sensing unit.
  • the light emitted by the light source is distributed on the touch detection area of the touch panel, and the optical sensing unit is configured to acquire touch data generated on the touch detection area.
  • the touch screen including the light source works well under most operating conditions after the light source is improved, the detection environment is detected when the frame frequency of the optical sensing unit (such as the camera) is high. A few changes may affect the judgment of the optical sensing unit on the touch. In other words, when the frame rate of the optical sensing unit is high, the reliability of the detection result is poor. Therefore, at present, the industry is generally working on how to improve the stability of the detection environment, specifically, for example, how to enhance the uniformity of illumination of the light source.
  • the present invention provides a touch screen for enhancing the uniformity of light distributed over the touch detection area therein.
  • the present invention provides a touch system for enhancing the distribution in the touch screen. Uniformity of light on the touch detection zone; the present invention provides A light source that enhances the uniformity of the light emitted by it.
  • a first aspect of the present invention provides a light source including an illuminator, a light guide body, and a reflection unit, wherein the illuminant is disposed at a port of the light guide body, and the reflection unit is formed on a side of the light guide body A part of the light transmitted in the light guiding body is reflected by the reflecting unit and is emitted from a side of the light guiding body away from the reflecting unit.
  • the reflecting unit is a reflecting plate or a reflective film; the reflecting plate is separated from or attached to a side surface of the light guiding body, and a side of the reflecting plate facing the light guiding body A reflective surface is formed; the reflective film is attached or embedded in a side surface of the light guide.
  • the reflective surface and/or the side of the light guide body adjacent to the reflective unit includes at least two inclined surface groups, each of the inclined surface groups includes two inclined surfaces having an included angle, and each of the inclined surface groups is continuously arranged.
  • the adjacent set of inclined faces have the same angle, or the set of inclined faces gradually decreases along the port of the guide to the center, and the set of inclined faces along the transverse direction of the light guide body The angle between the bevel groups is gradually reduced from the sides of the light guiding body near the reflecting unit and/or the sides of the reflecting surface to the center.
  • each of the inclined surface groups is equal in height, or the height of each of the inclined surface groups is determined by the light guiding body and/or the reflecting plate when the inclined surface group is along a longitudinal cutting direction of the light guiding body
  • the port to the center gradually increases, and the center of each of the inclined surface groups gradually increases as the inclined surface group faces the transverse direction of the light guiding body.
  • the reflective surface and/or the side of the light guide body adjacent to the reflective unit includes at least two curved surfaces, each of the curved surfaces being continuously arranged; adjacent curved surfaces having the same arc length And arcs; or, when each of the arc faces is along the longitudinal section of the light guide body, if each of the arc faces has the same arc length, the arc is from the port of the light guide body and/or the reflector plate to The center gradually increases, and if the arc faces have the same arc, the arc length thereof gradually decreases from the port to the center of the light guide body and/or the reflector plate; each of the arc faces along the light guide body In the cross-sectional direction, if each arc surface has the same arc length, the arc is gradually increased from the side of the light guiding body close to the reflecting unit and/or the two sides of the reflecting surface to the center; if each arc surface has The same arc, then the arc length is guided by the guide
  • each of the rectangular cross-sections is equal in height, or each of the rectangular cross-sections is along a longitudinal section of the light guide body, and the height of each of the rectangular cross-sections is controlled by the light guide body and/or the reflection
  • the port of the plate is increased to the center; when the rectangular cross-section is along the transverse plane of the light guide body, the height of each of the rectangular cross-sections is close to the side of the reflective unit and/or the side of the light guide body
  • the two sides of the reflecting surface gradually increase toward the center.
  • the reflecting surface and/or the side of the light guiding body adjacent to the reflecting unit is a plane, and an angle between the plane and the light emitting surface is less than 90 degrees.
  • the reflecting unit covers a top surface and a bottom surface of the light guiding body.
  • the light source further includes a astigmatism substance, the astigmatism substance is located between the reflection unit and the light guide body, and a part of the light transmitted in the light guide body passes through the astigmatism substance to reach away from the reflection The side of the unit is shot.
  • the illuminant is a light emitting diode or a cold cathode fluorescent lamp.
  • the light guide body is one of glass, optical fiber or acrylic.
  • a astigmatism substance is attached or embedded at a port of the light guide body, and the illuminant body provides a touch screen including a touch detection area, and an optical sensing unit for acquiring a touch data on the touch detection area; a control unit coupled to the optical sensing unit and determining a touch position by using the touch data acquired from the optical sensing unit; and, according to the first aspect of the present invention a light source, the light source is disposed on at least one side of the touch detection area, and wherein a side of the light guide body formed with the reflection unit is away from the touch detection Measuring area.
  • a third aspect of the present invention provides a touch system including the above touch screen.
  • the light source, touch screen and touch system provided by the present invention have the following advantages:
  • the invention provides a light source, which comprises an illuminant, a light guide body and a reflection unit by adjusting a structure of the light source, and placing the illuminant at a port of the light guide body, the reflection unit is formed
  • Light emitted by the illuminator is incident on the light guide body and transmitted in the light guide body at a side of the light guide body, wherein a part of the light is reflected by the reflection unit and then guided by the light guide
  • the body is emitted away from the side surface of the reflecting unit; that is, the surface light source is configured by the light emitting body and the light guiding body, and the uniformity of the light emitted by the surface light source is improved by the reflecting unit based on the reflection principle. Enhances the uniformity of the light emitted by it.
  • the invention provides a light source by designing a reflection surface of the reflector and/or a structure of a side surface of the light guide body (for example, in a longitudinal section and/or a cross section of the light guide body)
  • the side surface and/or the reflecting surface comprises at least two inclined surface groups, curved surfaces or rectangular cross sections; or directly, the side surfaces are inclined surfaces, so that when the reflecting plate is formed at the side surface, the change can be changed
  • the angle of the light that is directed toward the reflector adjusts the effect of the light emission; or, when the reflective film is attached or embedded on the side, the effect of the light emission can be adjusted by changing the shape of the reflective film;
  • the uniformity of the light emitted by the light source is a reflection surface of the reflector and/or a structure of a side surface of the light guide body (for example, in a longitudinal section and/or a cross section of the light guide body)
  • the side surface and/or the reflecting surface comprises at least two inclined surface groups, curved surfaces or rectangular cross sections;
  • a touch screen comprising: an illuminant, a light guide body and a reflection unit by adjusting a light source structure, and placing the illuminant at a port of the light guide body, wherein the reflection unit is formed in the Light from the illuminator is incident on the light guide body and transmitted in the light guide body, wherein a part of the light is reflected by the reflection unit and distributed on the side of the light guide body away from the touch detection area
  • the touch detection area that is, the surface light source is configured by the illuminant and the light guide, and the uniformity of the light emitted by the surface light source is improved by the reflection unit based on the reflection principle, thereby enhancing distribution in the Touching the uniformity of light on the detection zone;
  • the present invention provides a touch screen by designing a reflective surface in the reflective plate and/or a structure in the light guiding body away from the side of the touch detecting area (eg, in a longitudinal section of the light guiding body and/or a rectangular cross section; or, directly, the side surface is a bevel), so that the reflecting plate is formed in the
  • the effect of light emission can be adjusted by changing the angle of the light that is directed toward the reflector; or, when the reflective film is attached or embedded on the side, the light can be adjusted by changing the shape of the reflective film.
  • the effect of the emission thus, the uniformity of the light distributed on the touch detection area can be enhanced;
  • the light source includes an illuminant, a light guide body and a reflection unit by adjusting a structure of the light source therein, and the illuminant is placed at a port of the light guide body, a reflection unit is formed at a side of the light guide body away from the touch detection area, and the reflection unit is further reflected by the reflection unit and distributed in the touch detection area; that is, the illuminant and the light guide are used first.
  • the invention provides a touch system, by designing a reflection surface in the reflection plate and/or a side of the light guide body away from the touch detection area disposed in an inner light source thereof (for example, in the light guide)
  • the side surface and/or the reflecting surface comprises at least two bevel sets, curved faces or rectangular cross sections; or, directly, the side faces are beveled), so that
  • the reflecting plate is formed at the side surface, the effect of light emission can be adjusted by changing the angle of the light that is directed toward the reflecting plate; or, when the reflective film is attached or embedded on the side surface, the reflection can be changed
  • the morphology of the film adjusts the effect of light emission; this enhances the uniformity of light distributed over the touch detection area of the touch screen.
  • FIG. 2 is a cross-sectional view showing the structure of an illuminant and a light guide body in the first embodiment of the touch screen of the present invention
  • FIG. 3 is a schematic structural view of a second embodiment of a touch screen of the present invention.
  • FIG. 4 is a schematic structural view of a top surface of a light guide body in an embodiment of a touch screen according to the present invention.
  • FIG. 5 is a schematic structural diagram of a third embodiment of a touch screen according to the present invention.
  • FIG. 6 is a schematic view showing a cutting direction in an embodiment of a touch screen according to the present invention.
  • FIG. 7 is a longitudinal cross-sectional view of a light guide body in a fourth embodiment of the touch screen of the present invention.
  • FIG. 8 is a longitudinal cross-sectional view of a light guide body in a fifth embodiment of the touch screen of the present invention.
  • FIG. 9 is a longitudinal cross-sectional view of a light guide body in a sixth embodiment of the touch screen of the present invention.
  • FIG. 10 is a schematic cross-sectional view of a light guide body in a seventh embodiment of the touch screen of the present invention.
  • FIG. 11 is a schematic cross-sectional view of a light guide body in an eighth embodiment of the touch screen of the present invention.
  • FIG. 12 is a schematic cross-sectional view of a light guide body in a ninth embodiment of the touch screen of the present invention.
  • FIG. 13 is a schematic cross-sectional view of a light guide body in a tenth embodiment of the touch screen of the present invention.
  • the touch screen comprises: a light source 100, a touch detection area 120, and a camera 140 (in other embodiments, other optical sensors such as a camera, a camera or an optical sensor) Unit) and control unit.
  • the light source 100 is used to illuminate the touch detection area 120
  • the camera 140 is used to acquire touch data generated on the touch detection area 120.
  • the control unit is coupled to the camera 140 and determines the touch position using the touch data acquired from the camera 140.
  • Light source 100 is typically placed on the side of touch detection area 120. In the illustrated embodiment, the light source 100 is placed only on one side of the touch detection area 120; in other embodiments, the light source 100 can be placed on two or three sides of the touch detection area 120.
  • the light source 100 includes an illuminator 102, a light guide 104, and a reflection plate 106.
  • the illuminator 102 is placed at the port 105 of the light guide body 104, and the reflection plate 106 is formed at the side 109 of the light guide body 104 away from the touch detection area 120.
  • the reflector 106 may be separate from the light guide 104.
  • Light emitted by the illuminator 102 is incident on the light guide 104 and transmitted within the light guide 104. A part of the light transmitted in the light guide body 104 is directly emitted from the side surface 1092 of the touch detection area 120 via the light guide 104, and is distributed on the touch detection area 120.
  • Another part of the transmitted light is reflected by the reflecting plate 106 (actually the reflecting surface 1064 of the surface guiding body 104) and then emitted by the light guiding body 104 near the side surface 1092 of the touch detecting area 120, and distributed in the touch detecting area 120 (eg Figure 1 shows the light rays 1-4).
  • the illuminator 102 may be a light emitting diode or a cold cathode fluorescent lamp, preferably an infrared light emitting diode.
  • the light guide body 104 may be one of light transmissive materials such as glass, optical fiber or acrylic.
  • the light guide body 104 may have various shapes such as a cylinder, a triangular prism, or a rectangular parallelepiped.
  • the side surface 1092 of the touch detection area 120 is a plane (for example, one side of a triangular prism or a rectangular parallelepiped light guide body), the plane is The angle of the touch detection area 120 is less than or equal to 90°, which can reduce unnecessary scattering of the detection light emitted through the light guide 104.
  • the side surface 1092 is not limited to a flat surface, but may be other types of surfaces, for example, the side surface 1092 is an uneven surface.
  • the reflector 106 can be any reflective device commercially available, such as a reflective strip, a flat mirror or a total reflection prism assembly.
  • the optical sensor can be one or a combination of a photoresistor, a photodiode, a phototransistor, a photocoupler, or a photovoltaic cell.
  • the manner in which the illuminator 102 is placed at the port of the light guide body 104 includes: a notch 1041 is formed at the port 105, and the illuminant 102 is placed in the notch as shown in FIG. In 1041.
  • the longitudinal section of the recess 1041 may be any shape such as a cone, an arc or a rectangle; the cross section of the recess 1041 may be any shape such as a circle, an ellipse, a square or a rectangle; the notch 1041 illustrated in FIG.
  • the longitudinal section is rectangular and the cross section is rectangular.
  • the illuminator 102 can be mechanically or adhesively bonded to the port 105 of the light guide (as shown in Figure 1).
  • a astigmatism film 1082 may be formed on the surface of the recess 1041, so that the uniformity of the light incident from the illuminator 102 into the light guide body 104 can be enhanced.
  • the number of the illuminants 102 may be one, two or more.
  • the illuminant 102 is placed at any port 105 of the light guide body 104; when the illuminant 102 is included in the light source 100, each illuminant 102 is respectively placed in the light guide The port of body 104.
  • two illuminants 102 are generally included in the light source 100.
  • the present invention is also described by way of example, and the related implementation of including one illuminant 102 in the light source 100 is described. The examples are not described.
  • the reflector 106 can be attached to the light guide 104. That is, the reflecting plate 106 may be attached to the side surface 109 of the light guiding body 104 away from the touch detection area 120 by mechanical bonding or adhesive bonding.
  • the touch screen includes: a light source 100, a touch detection area 120, and a camera 140 (in other embodiments, other optical sensors such as a camera, a camera, or an optical sensor may also be used. Unit) and control unit.
  • the light source 100 is used to illuminate the touch detection area 120
  • the camera 140 is configured to acquire touch data generated on the touch detection area
  • the control unit is coupled to the camera 140 and utilizes the image acquired from the camera 140. Touch the data to determine the touch location.
  • the light source 100 is placed on the side of the touch detection area 120. In the illustrated embodiment, the light source 100 is placed only on one side of the touch detection area 120; in other embodiments, the light source 100 can be placed on two or three sides of the touch detection area 120.
  • the light source 100 includes an illuminator 102, a light guide 104, a reflection plate 106, and a diffuser 108.
  • the illuminator 102 is disposed at the port 105 of the light guide body 104, and the reflector 106 is formed at a side 109 of the light guide body 104 away from the touch detection area 120.
  • the reflection plate 106 may be disposed separately from the light guide body 108.
  • the diffusing plate 108 is sandwiched between the reflecting plate 106 and the light guiding body 104.
  • a part of the light transmitted in the light guiding body 104 is directly emitted from the side surface 1092 of the touch detecting area 120 via the light guiding body 104 and distributed on the touch detecting area 120; another part of the light transmitted is transmitted through the diffusing plate 108.
  • the reflective plate 106 (actually facing the reflective surface 1064 of the light guide body 104) is reflected by the reflective plate 106 and then distributed through the diffusing plate and the light guide body to the touch detection area 120 (see FIG. 3).
  • Medium light 1-4 shows).
  • the diffusing plate 108 may be separated from the reflecting plate 106 or the light guiding body 104, or may be separated from the reflecting plate 106 and the light guiding body 104.
  • the diffuser 108 may also be attached to the reflector 106 and/or the light guide 104. That is, the diffusing plate 108 may be attached to the reflecting plate 106 and/or the side surface 109 of the light guiding body 104 away from the touch detecting area 120 by mechanical bonding or adhesive bonding.
  • the diffusing plate 108 can be any diffusing device commercially available as long as the light can be diverged.
  • the reflector 106 or the reflector 106 and the diffuser 108 may also cover the top surface 107 of the light guide 104 or cover the top surface 107 and the bottom surface 1072 at the same time.
  • the top surface means a side area of the light guide body 104 that is farthest from the plane of the touch detection area 120.
  • the bottom surface means that the light guide body 104 is opposite to the top surface.
  • Side Area. 4 shows an example in which the reflecting plate 106 and the diffusing plate 108 simultaneously cover the top surface 107 and the bottom surface 1072 of the light guiding body 104.
  • the light guide body 104 has a rectangular cross section at this time.
  • the covering of the top surface and/or the top surface of the light guide by the reflecting plate 106 or the reflecting plate 106 together with the diffusing plate 108 can reduce unnecessary scattering of the detection light emitted through the light guiding body 104.
  • the reflector 106 covers the top surface of the light guide 104 and the diffuser 108 covers only the side of the light guide 104 close to the reflector.
  • the selection of the illuminator 102, the light guide 104 and the reflector 106, and the positional relationship between the illuminator 102 and the light guide 104 can be The same as that described in the first embodiment of the touch screen, and details are not described herein again.
  • the touch screen comprises: a light source 100, a touch detection area 120, and a camera 140 (in other embodiments, other optical sensors such as a camera, a camera or an optical sensor) Unit) and control unit.
  • the light source 100 is used to illuminate the touch detection area 120.
  • the camera 140 is configured to acquire touch data generated on the touch detection area 120.
  • the control unit is coupled to the camera 140 and utilizes the location acquired from the camera 140. The touch data determines the touch location.
  • the light source 100 is placed on the side of the touch detection area 120. In the illustrated embodiment, the light source 100 is placed only on one side of the touch detection area 120; in other embodiments, the light source 100 can be placed on two or three sides of the touch detection area 120.
  • the light source 100 includes an illuminator 102, a light guide 104, and a reflective film 1062.
  • the illuminant 102 is disposed at the port 105 of the light guide body 104, and the reflective film 1062 is attached to the side surface 109 of the light guide body 104 away from the touch detection area 120.
  • Light emitted by the illuminator 102 is incident on the light guide 104 and transmitted within the light guide 104.
  • a portion of the light transmitted within the light guide 104 exits directly through the light guide 104 near the side 1092 of the touch detection area 120 and is distributed over the touch detection area 120.
  • another part of the transmitted light is reflected by the reflective film 1062, and then exits the side surface 1092 of the touch detection area 120 through the light guide 104 and is distributed in the touch detection area 120 (such as the light in FIG. 5). 1-4)).
  • the manner in which the reflective film 1062 is attached to the side surface 109 of the light guide body 104 away from the touch detection area 120 includes: attaching to the guide by mechanical bonding or adhesive bonding.
  • the light body 104 is away from the side surface 109 of the touch detection area 120 (in this case, the reflective film 1062 may be a reflective strip or a reflective sheet), or formed on the light guide by spraying, electroless plating or sputtering.
  • the body 104 is away from the side 109 of the touch detection area 120 (in this case, the material form of the material for forming the reflective film 1062 may be a chemical solution or a solid particle).
  • the reflective film 1062 can also be embedded in the side of the light guide 104 away from the touch detection area 120.
  • the term "embedded in” means that a part of the material of the light guide 104 is consumed when the reflective film 1062 is formed, that is, the reflective film 1062 is embedded in the light guide 104.
  • the light source further includes a diffusing film via which the reflective film 1062 is attached or embedded in the light guide 104 away from the side 109 of the touch detection area 120.
  • a portion of the light transmitted in the light guide body 104 is directly emitted from the side surface 1092 of the touch detection area 120 via the light guide 104, and is distributed in the touch detection area 120.
  • the other part of the transmitted light reaches the reflective film 1062 via the astigmatism film, is reflected by the reflective film 1062, and then exits through the astigmatism film and the light guide 104, and then exits from the light exit surface 1092. At this time, the astigmatism film is sandwiched between the reflective film 1062 and the side surface 109.
  • the astigmatism film is attached to the side surface 109 before the reflective film 1062.
  • the astigmatism film may be attached to the side surface 109 by mechanical bonding or adhesive bonding (at this time, the astigmatism film may be an astigmatism strip or a astigmatism sheet, and has good light transmittance), or, by spraying, Electroless plating or sputtering is formed on the side surface 109 (in this case, the material form of the material for forming the astigmatism film may be a chemical solution or a solid particle).
  • the astigmatism film is embedded in the side surface 109 before the reflective film 1062.
  • the astigmatism film is embedded in the light guide body 104, and the reflection film 1062 is further embedded in the astigmatism film.
  • the reflective film 1062 or the reflective film 1062 and the astigmatism film may also cover a top surface or a top surface and a bottom surface of the light guide body 104.
  • the light transmitted in the light guide 104 passes through the diffused light film and the reflective film 1062, and then returns to the light guide 104, thereby reducing unnecessary scattering of the detection light emitted through the light guide 104.
  • the selection of the body 102 and the light guide 104, and the positional relationship between the illuminator 102 and the light guide 104 can be the same as those described in the first embodiment of the touch screen; similar to the third embodiment of the touch screen
  • the selection of the reflective film 1062 is the same as that described in the third embodiment of the touch screen, and details are not described herein again.
  • a light-scattering substance e.g., a diffusing plate or a diffusing film
  • the relationship between the astigmatism substance and the reflecting unit is not limited to the manner defined in the above embodiment.
  • a reflective film may be attached to the diffusing plate
  • a diffusing film may be attached to the reflecting plate
  • a diffusing film may be interposed between the reflecting plate and the side of the light guiding body remote from the touch detecting area.
  • the designer of the present invention believes that the structure of the side of the light guiding body that approaches or carries the reflecting unit such as the reflecting plate 106 or the reflecting film 1062 can be designed so that when the reflecting plate 106 is formed at the side surface 109, the direction can be changed.
  • the angle of the light of the reflecting plate 106 adjusts the effect of light emission; or, when the reflecting film 1062 is attached or embedded in the side surface 109, the effect of light emission can be adjusted by changing the shape of the reflecting film 1062.
  • Both of the above designs have the potential to enhance the uniformity of light distributed over the touchscreen touch detection area 120.
  • the structural improvement of the side surface 109 of the light guide body 104 remote from the touch detection area 120 can constitute a more embodiment of the touch screen of the present invention.
  • the structure of the light guide 104 will be described.
  • the light guide body 104 is taken as a cylinder, and the light guide is cut in the longitudinal direction of the light guide body 104, that is, in the direction of xx.
  • the cut surface obtained when the body 104 is obtained (for this premise, the subsequent touch screen embodiment is the same as this example, and will not be described again), and the side 109 of the light guide body 104 remote from the touch detection area 120 includes at least two inclined surface groups.
  • Each bevel set includes two ramps 1042 and 1044 having an included angle 1043.
  • Each bevel group is arranged in series. Adjacent sets of bevels may have the same angle 1043.
  • the tip of the angle 1043 may be located on or within the boundary of the light guide body 104 when the set of slopes is not formed. When located within the boundary, more light is reflected through the set of bevels, and the effect of improving the uniformity of the hook is more pronounced, and space is also saved when the tip of the included angle 1043 is outside the boundary.
  • the light source 100 can include An illuminator 102 is disposed at a port 105 of the light guide body 104. At this time, the angle 1043 of each bevel group may be gradually decreased from the port 105 close to the illuminator 102 to the port 105 remote from the illuminator 102.
  • the light source 100 can also include two illuminants 102 that are respectively placed at the two ports 105 of the light guide body 104. At this time, the angle 1043 of each bevel group may be gradually decreased from the port 105 to the center of the light guide 104.
  • each bevel group can be equal.
  • the height of the bevel set means the vertical distance from the end of the angle 1043 to the line connecting the other ends of the two bevels 1042 and 1044 in the set of bevel groups.
  • the height of each slant group may be gradually increased from the port 105 adjacent to the illuminator 102 to the port 105 remote from the illuminator 102; when the light source 100 includes two illuminators 102, each slant The height of the group may gradually increase from the port 105 to the center of the light guide 104.
  • the side surface 109 of the light guide body 104 remote from the touch detection area 120 includes at least two curved surfaces 1046.
  • Each of the curved faces 1046 is continuously arranged, and the adjacent curved faces 1046 may have the same arc length and curvature.
  • the top end of the curved surface 1046 may be located on or within the boundary of the light guide body 104 when the curved surfaces 1046 are not formed. When located within the boundary, more light is reflected through each of the curved faces 1046, and the effect of improving the uniformity is more pronounced, and space is also saved when the tip of the curved face 1046 is outside the boundary.
  • the illuminant 102 is placed at a port 105 of the light guide 104.
  • the arc may be gradually decreased from the port 105 adjacent to the illuminator 102 to the port 105 remote from the illuminator 102; if each of the curved faces 1046 has the same arc, The arc length may be gradually reduced from a port 105 adjacent to the illuminator 102 to a port 105 remote from the illuminator 102.
  • the two illuminants 102 are respectively placed at the two ports 105 of the light guide 104.
  • the curvature thereof gradually increases from the port 105 of the light guiding body 104 to the center; or, if each curved surface 1046 has the same curvature, and its arc length gradually decreases from the port 105 to the center of the light guide 104.
  • the top ends of the curved faces 1046 may not be in a straight line.
  • the side 109 of the light guide body 104 remote from the touch detection area 120 includes at least two rectangular sections 1048.
  • Each rectangular section 1048 is continuously arranged, and the distance between adjacent rectangular sections 1048 can be equal.
  • the distance between the rectangular sections 1048 means a large separation between the opposite sides of the adjacent rectangular sections 1048.
  • each rectangular section 1048 may be located on or within the boundary of the light guide body when each rectangular section 1048 is not formed. When located within the boundary, more light is reflected through each rectangular section 1048, and the effect of improving the uniformity is more pronounced, and space is also saved when the top end of the rectangular section 1048 is outside the boundary.
  • the illuminator 102 when the light source 100 includes an illuminator 102, the illuminator 102 is placed in a port 105 of the light guide 104. At this time, the distance between adjacent rectangular sections 1048 may be gradually reduced from the port 105 adjacent to the illuminator 102 to the port 105 remote from the illuminator 102.
  • the light source 100 includes two illuminators 102, the two illuminants 102 are placed at the two ports 105 of the light guide 104, respectively. At this time, the distance between adjacent rectangular sections 1048 is gradually decreased from the port 105 to the center of the light guide 104.
  • each rectangular section 1048 can be equal.
  • the height of each rectangular section 1048 may be gradually increased from the port 105 adjacent to the illuminator 102 to the port 105 remote from the illuminator 102; when the light source 100 includes two illuminants 102, each The height of the rectangular section 1048 can be gradually increased from the port 105 to the center of the light guide 104.
  • the light guide body 104 is remotely touch-detected.
  • the side 109 of the region 120 can be a plane 1140, and the angle between the plane 1140 and the touch detection zone 120 is less than 90 degrees. This reduces the probability of unwanted scattering of light.
  • the guide is cut in the cross-sectional direction of the light guide body 104, that is, in the yy' direction.
  • the cut surface obtained when the light body 104 is obtained (for this premise, the subsequent touch screen embodiment is the same as this example, and will not be described again), and the side surface 109 of the light guide body 104 remote from the touch detection area 120 includes at least two inclined surface groups.
  • Each bevel set includes two bevels 1142 and 1144 having an included angle 1143.
  • Each bevel group is continuously arranged, and adjacent bevel groups may have the same angle 1143.
  • the tip end of the included angle 1143 may be located on or within the boundary of the light guide body 104 when the bevel group is not formed. When located within the boundary, more light is reflected through the bevel set, and the effect of improving the uniformity is more pronounced, and space is also saved when the tip of the included angle 1143 is outside the boundary.
  • the heights of the sets of bevels may be equal.
  • the angle 1143 of each bevel group may be gradually reduced from both sides to the center of the side.
  • the height of each bevel group may gradually increase from both sides to the center of the side.
  • the lines parallel to the slopes 1142 and 1144 are also parallel to the touch detection area 120.
  • the side surface 109 of the light guide body 104 remote from the touch detection area 120 includes at least two curved faces 1146.
  • the arcuate faces 1146 are consecutively arranged, and adjacent arcuate faces 1146 can have the same arc length and curvature.
  • the top end of the curved surface 1146 may be located on or within the boundary of the light guide body 104 when the curved surfaces 1146 are not formed. When located within the boundary, more light is reflected through each of the curved faces 1146, and the effect of improving its uniformity is more pronounced, and space is also saved when the tip end of the curved face 1146 is outside the boundary.
  • the curvature of each of the curved faces 1146 having the same arc length may be gradually decreased from both sides to the center of the side faces; or, each of the curved faces 1146 having the same curvature
  • the arc length can be gradually reduced from both sides to the center of the side. at this time,
  • the top ends of the curved faces 1146 may not be in a straight line.
  • a straight line parallel to the central axis of each curved surface 1146 is also parallel to the touch detection area 120.
  • each curved surface 1146 having the same arc or increasing the curvature of each curved surface 1146 having the same arc length can make the light guide
  • the light transmitted within the body 104 increases the chance of being reflected, which enhances the uniformity of the light distributed over the touch detection area.
  • the side 109 of the light guide body 104 remote from the touch detection area 120 includes at least two rectangular sections 1148.
  • Each rectangular section 1148 is continuously arranged, and the distance between adjacent rectangular sections 1148 can be equal.
  • the distance between the rectangular sections 1148 means the distance between the opposite sides of the adjacent rectangular sections 1148.
  • the top end of each rectangular section 1148 may be located on or within the boundary of the light guide body 104 when the rectangular section 1148 is not formed. When located within the boundary, more light is reflected through each of the rectangular sections 1148, and the effect of improving the uniformity is more pronounced, and space is also saved when the top end of the rectangular section 1148 is outside the boundary.
  • the distance between adjacent rectangular cross-sections 1148 may gradually decrease from both sides to the center of the sides.
  • the height of each rectangular section 1148 can be equal.
  • the height of each rectangular section 1148 can also be gradually increased from both sides to the center of the side.
  • a straight line parallel to the central axis of each rectangular section 1148 is also parallel to the touch detection area 120.
  • the designer of the present invention analyzes that reducing the distance between adjacent rectangular sections 1148, or increasing the height of the rectangular section 1148, can increase the amount of light transmitted in the light guide body 104 to be reflected. The opportunity to enhance the uniformity of light distributed over the touch detection area.
  • the present invention also provides a touch system comprising the above touch screen, and the touch system may be a touch display formed by mounting the touch screen on a display surface.
  • the invention also provides a light source.
  • the light source comprises an illuminant, a light guide and a reflector, the illuminator is disposed at a port of the light guide, and the reflector is formed at a side of the light guide .
  • the reflector and the light guide may be separated. A portion of the light transmitted is emitted directly through the side of the light guide away from the reflector. Another portion of the light transmitted in the light guide body is reflected by the reflecting plate (actually a reflecting surface facing the light guiding body), and then exits through the side surface of the light guiding body away from the reflecting plate.
  • the illuminant may be a light emitting diode or a cold cathode fluorescent lamp, preferably an infrared light emitting diode.
  • the light guiding body may be one of a light transmissive material such as glass, optical fiber or acrylic.
  • the light guiding body may be in various shapes such as a cylinder, a triangular prism or a rectangular parallelepiped. Wherein, when the side of the light guiding body away from the reflecting plate (ie, the light exiting surface) is a plane (for example, one of a triangular prism or a rectangular parallelepiped light guiding body), the plane and the light are emitted.
  • the angle of the face is less than 90°, which reduces unnecessary scattering of the detection light emitted through the light guide.
  • the side surface is not limited to a flat surface, but may be other types of surfaces, for example, the side surface is an uneven surface.
  • the reflector may be any reflective device commercially available, such as a reflective strip, a flat mirror or a total reflection prism assembly.
  • the manner in which the illuminant is placed at the port of the light guide body includes: forming a notch at the port, and placing the illuminant in the notch.
  • the longitudinal section of the recess may be any shape such as a cone, an arc or a rectangle; the cross section of the recess may be any shape such as a circle, an ellipse, a square or a rectangle.
  • the illuminant may be attached to the port of the light guide by mechanical or adhesive bonding.
  • a astigmatism film may be formed on the surface of the recess, so that the uniformity of light rays incident on the light guide by the illuminant can be enhanced.
  • the number of the illuminants may be one, two or more. Only included in the light source In the case of one illuminator, the illuminant is placed at any port of the light guide; when the illuminator includes two illuminants, each illuminant is placed at a port of the light guide. In order to enhance the brightness of the light emitted by the light source, two illuminants are generally included in the light source. The present invention is also described by way of example, and the related embodiments including one illuminant in the light source are not described herein.
  • the reflector can be attached to the light guide. That is, the reflecting plate may be attached to the side surface of the light guiding body by mechanical bonding or adhesive bonding.
  • the light source comprises an illuminant, a light guide, a reflector and a diffuser.
  • the illuminator is placed at a port of the light guide, and the reflector is formed at a side of the light guide.
  • the reflector and the light guide may be separately disposed, and the diffuser is sandwiched between the reflector and the light guide. A portion of the light transmitted within the light guide body exits directly from the side of the light guide body remote from the reflector.
  • Another portion of the light transmitted in the light guiding body reaches the reflecting plate (actually a reflecting surface facing the light guiding body) via the diffusing plate, is reflected by the reflecting plate, and then passes through the diffusing plate and the guide The light body is emitted from a side of the light guide that is away from the reflector.
  • the astigmatism plate may be separated from the reflector or the light guide, or may be separated from the reflector and the light guide.
  • the diffuser plate may also be attached to the reflector and/or the light guide. That is, the diffusing plate may be attached to the side surface of the reflecting plate and/or the light guiding body by mechanical bonding or adhesive bonding.
  • the diffusing plate may be any diffusing device commercially available as long as the light is diverged.
  • the reflecting plate or the reflecting plate and the diffusing plate may cover a top surface or a top surface and a bottom surface of the light guiding body.
  • the top surface means a side area opposite to the placement surface when the light guide body is placed in the longitudinal direction thereof;
  • the bottom surface means a placement surface when the light guide body is placed along the longitudinal direction thereof A side surface of the side surface of the light guide body which is appropriately extended by the placement surface. The above coverage can reduce unnecessary scattering of the detection light emitted through the light guide.
  • the selection of the illuminant, the light guide and the reflector, and the positional relationship between the illuminator and the light guide may be the first with the light source.
  • the light source comprises an illuminant, a light guide and a reflective film.
  • the illuminant is placed at a port of the light guide, and the reflective film is attached to a side surface of the light guide.
  • a part of the light transmitted in the light body is directly emitted from the side of the light guide body away from the reflective film.
  • Another portion of the light transmitted in the light guide body is reflected by the reflective film and then exits through a side of the light guide body remote from the reflective film.
  • the manner in which the reflective film is attached to the side surface of the light guide body includes: attaching to the side surface of the light guide body by mechanical bonding or adhesive bonding (in this case, the reflective film may be a reflective strip) Or a reflective sheet), or formed on the side of the light guide body by spraying, electroless plating or sputtering (in this case, the material form of the material for forming the reflective film may be a chemical solution or a solid particle) .
  • the reflective film may also be embedded in the side of the light guide.
  • embedded in means that a portion of the light guide material is consumed when the reflective film is formed, that is, the reflective film is embedded in the light guide.
  • the light source further includes a diffusing film via which the reflective film is attached or embedded in the side of the light guiding body. a part of the light transmitted in the light guide body is directly emitted from the side of the light guide body away from the reflective film; and another part of the light transmitted in the light guide body reaches the reflective film via the light diffusing film, After the reflection film is reflected, it is emitted from the light exit surface via the astigmatism film and the light guide. At this time, the astigmatism film is sandwiched between the reflective film and the side surface. When the reflective film is attached to the side surface via the astigmatism film, the astigmatism film is attached to the side surface before the reflective film.
  • the astigmatism film may be attached to the side surface by mechanical bonding or adhesive bonding (in this case, the astigmatism film may be an astigmatism strip or a astigmatism sheet and has good light transmittance), or, by spraying, chemistry
  • a plating or sputtering method is formed on the side surface (in this case, a material form of a material for forming the astigmatism film may be a chemical solution or a solid particle).
  • the reflective film or the reflective film and the astigmatism film may also cover a top surface of the light guide.
  • Light transmitted in the light guide body is attached or embedded in a top surface of the light guide body
  • the reflective film or the astigmatism film and the reflective film are returned to the light guide body, thereby reducing unnecessary scattering of the detection light emitted through the light guide body.
  • the selection of the illuminant and the light guide body, and the positional relationship between the illuminant and the light guide body may be the same as the light source The same as described in an embodiment.
  • the selection of the reflective film is the same as that described in the third embodiment of the light source and will not be described herein.
  • the relationship between the astigmatism substance and the reflecting unit is not limited to the manner defined in the above embodiment.
  • the reflective film may be attached to the diffusing plate
  • the diffusing film may be attached to the reflecting plate
  • a diffusing film may be interposed between the reflecting plate and the side of the light guiding body remote from the touch detecting area.
  • the designer of the present invention believes that the structure of the side of the light guiding body that is close to or carries the reflecting unit such as the reflecting plate and the reflecting film can be designed, so that when the reflecting plate is formed at the side surface, the reflecting plate can be changed by changing The angle of the light modulates the effect of the light emission; or, when the reflective film is attached or embedded on the side surface, the effect of light emission can be adjusted by changing the shape of the reflective film. All of the above designs enhance the uniformity of the light emitted by the light source.
  • the light guide body is taken as a cylinder, and the cut surface obtained when the light guide body is cut in the direction of xx as shown in FIG. 6 is taken in the longitudinal direction of the light guide body.
  • the side of the light guiding body near or the 7-load reflecting unit includes at least two inclined surface groups.
  • Each bevel set includes two bevels having an included angle.
  • Each bevel group is continuously arranged, and adjacent bevel groups may have the same angle.
  • the tip end of the angle may be located on or within a boundary of the light guide body when the set of slopes is not formed. When located within the boundary, more light is reflected through the set of bevels, and the effect of improving the uniformity is more pronounced, and space is also saved when the tip of the included angle is outside the boundary.
  • the light source can include a An illuminant, the illuminator being placed at a port of the light guide. At this time, the angle of each bevel group may be gradually decreased from a port close to the illuminator to a port remote from the illuminator.
  • the light source may also include two illuminants, two illuminators being respectively placed at the two ports of the light guide. At this time, the angle of each bevel group may gradually decrease from the port to the center of the light guide.
  • each bevel group can be equal.
  • the height of the set of bevels means the vertical distance from the end of the angle to the line connecting the other ends of the two bevels in the set of bevels.
  • the height of each slant group may be gradually increased from a port close to the illuminator to a port remote from the illuminant; when the light source comprises two illuminants, the height of each bevel group may be guided by the light guide The port's port to center gradually increases.
  • the side of the light guiding body near or the side of the 7-load reflecting unit includes at least two curved faces.
  • Each arc surface is continuously arranged, and adjacent arc surfaces may have the same arc length and curvature.
  • the top end of the curved surface may be located on or within the boundary of the light guide body when each of the curved surfaces is not formed. When located within the boundary, more light is reflected through each curved surface, and the effect of improving the uniformity is more obvious, and space is also saved when the top end of the curved surface is outside the boundary.
  • the illuminant when the light source comprises an illuminant, the illuminant is placed at a port of the light guide. At this time, if each arc surface has the same arc length, the arc may be gradually decreased from a port close to the illuminator to a port remote from the illuminator; if each arc surface has the same arc, the arc length may be close to The port of the illuminator is gradually reduced to a port remote from the illuminant.
  • the light source comprises two illuminants
  • the two illuminants are respectively placed at the two ports of the light guide.
  • each arc surface has the same arc length
  • the arc is gradually increased from the port to the center of the light guide body; or, if each arc surface has the same arc, the arc length is determined by the light guide body.
  • the port to the center gradually decreases.
  • the tops of the arc faces may not be in a straight line.
  • the side of the light guide body adjacent to or carrying the reflection unit comprises at least two rectangular sections. Each rectangular section is continuously arranged, and the distance between adjacent rectangular sections may be equal. Wherein, the distance between the rectangular cross sections means the distance between the opposite side faces between adjacent rectangular sections.
  • each rectangular section may be located on or within the boundary of the light guide body when each rectangular section is not formed. When located within the boundary, more light is reflected through each rectangular section, and the effect of improving the uniformity is more pronounced, and space is also saved when the tip of the rectangular section is outside the boundary.
  • the illuminant when the light source comprises an illuminant, the illuminant is placed at a port of the light guide. At this time, the distance between adjacent rectangular sections may be gradually reduced from a port close to the illuminator to a port remote from the illuminator.
  • the light source comprises two illuminants
  • the two illuminants are respectively placed at the two ports of the light guide. At this time, the distance between the adjacent rectangular sections gradually decreases from the port to the center of the light guide.
  • each rectangular section may be equal.
  • the height of each of the rectangular sections may be gradually increased from a port adjacent to the illuminator to a port remote from the illuminator.
  • the height of each rectangular section may gradually increase from the port to the center of the light guide.
  • the designer of the present invention believes that reducing the distance between adjacent rectangular sections, or increasing the height of the rectangular section, can increase the chance of light transmitted in the light guide body being reflected, which is beneficial to the opportunity. Enhances the uniformity of the light emitted by the light source.
  • the side of the light guide body adjacent to or carrying the reflective unit may be planar, and the angle of the plane to the light exit surface is less than 90°. This reduces the probability of unnecessary scatter of light.
  • the side of the light guiding body that is close to or carrying the reflecting unit includes at least two inclined surface groups.
  • Each bevel set includes two bevels having an included angle.
  • Each bevel group is continuously arranged, and adjacent bevel groups may have the same angle. among them,
  • the tip of the included angle may be located on or within a boundary of the light guide when the set of slopes is not formed. When located within the boundary, more light is reflected through the set of bevels, and the effect of improving its uniformity is more pronounced, and space is also saved when the tip of the included angle is outside the boundary.
  • the heights of the sets of bevels may be equal.
  • the angle of each bevel group can also be gradually reduced from both sides to the center of the side.
  • the height of each bevel group may gradually increase from both sides to the center of the side.
  • the line parallel to each bevel is also parallel to the axis of the light guide.
  • the side of the light guide body near or the side of the 7-loaded reflection unit includes at least two curved faces.
  • Each arc surface is continuously arranged, and adjacent arc surfaces may have the same arc length and curvature.
  • the top end of the curved surface may be located on or within the boundary of the light guide body when each curved surface is not formed. When located within the boundary, more light is reflected through each curved surface, and the effect of improving the uniformity is more obvious, and space is also saved when the top end of the curved surface is outside the boundary.
  • the arc may gradually decrease from two sides to the center of the side surface; if each arc surface has the same arc, Then the arc length can be gradually reduced from both sides to the center of the side. At this time, the top ends of the arc faces may not be in a straight line.
  • the straight line parallel to the central axes of the respective arc faces is also parallel to the axis of the light guide.
  • the side of the light guide body adjacent to or carrying the reflection unit comprises at least two rectangular sections.
  • Each rectangular section is continuously arranged, and the distance between adjacent rectangular sections may be equal.
  • the distance between the rectangular cross sections means a large separation between opposite side faces between adjacent rectangular sections.
  • the top of each rectangular section can be located The boundary or the boundary in the case where the rectangular cross sections are not formed in the light guide body. When located within the boundary, more light is reflected through each rectangular section, and the effect of improving the uniformity is more obvious, and space is also saved when the tip of the rectangular section is outside the boundary.
  • the distance between adjacent rectangular cross-sections may gradually decrease from both sides to the center of the side.
  • the height of each rectangular section may be equal.
  • the height of each rectangular section may also gradually increase from both sides to the center of the side.
  • the line parallel to the central axis of each rectangular section is also parallel to the axis of the light guide.
  • the designer of the present invention believes that reducing the distance between adjacent rectangular sections, or increasing the height of the rectangular section, can increase the chance of light transmitted in the light guide body being reflected, which is beneficial to the opportunity. Enhances the uniformity of the light emitted by the light source.
  • structural improvements to the side surface of the light guide body may be equally applied to the reflection plate.
  • the structural modification of the reflecting surface, on which the inclined surface group, the curved surface, the rectangular cross section or the plane described in the foregoing embodiment is formed can still constitute an embodiment of the light source, and the combination of the embodiment and the foregoing embodiment Embodiments that can still constitute a light source will not be described again.
  • the illuminant and the light guide are used to form the surface light source, and the uniformity of the light emitted by the surface light source is improved by the reflection unit based on the reflection principle, thereby enhancing the uniformity of the light.
  • a astigmatism film is attached or embedded at the port of the light guide body, which is also advantageous for enhancing the uniformity of the light incident on the light guide body by the illuminant.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • Human Computer Interaction (AREA)
  • Planar Illumination Modules (AREA)
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Abstract

La présente invention concerne un écran tactile et un système tactile qui permettent d'améliorer l'homogénéité de la lumière répartie sur une zone de détection tactile (120) de l'écran tactile. L'écran tactile comporte une source de lumière (100) qui contient un corps électroluminescent (102), un corps de guidage de lumière (104) et une unité de réflexion (106). Le corps électroluminescent (102) est situé au niveau d'un orifice du corps de guidage de lumière (104) et l'unité de réflexion (106) est formée dans le corps de guidage de lumière (104) au niveau d'un côté éloigné d'une zone de détection tactile (120). La lumière émise par le corps électroluminescent (102) se projette dans le corps de guidage de lumière (104) et elle est transmise à l'intérieur du corps de guidage de lumière (104), puis une partie de la lumière transmise à l'intérieur du corps de guidage de lumière (104) est répartie sur la zone de détection tactile (120) après avoir été réfléchie par l'unité de réflexion (106). La présente invention concerne également une source de lumière (100) qui permet d'améliorer l'homogénéité de la lumière émise par la source de lumière (100).
PCT/CN2010/078665 2009-11-12 2010-11-12 Ecran tactile, système tactile et source de lumière WO2011057572A1 (fr)

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CN2009202469155U CN201927010U (zh) 2009-11-12 2009-11-12 一种触摸屏、触摸系统及光源
CN200920246915.5 2009-11-12

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US10761657B2 (en) 2016-11-24 2020-09-01 Flatfrog Laboratories Ab Automatic optimisation of touch signal
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