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WO2013073862A1 - Unité de réflexion pour module de détecteur tactile possédant une feuille rétro-réfléchissante, procédé de fabrication de celle-ci et dispositif optique équipé de l'unité de réflexion - Google Patents

Unité de réflexion pour module de détecteur tactile possédant une feuille rétro-réfléchissante, procédé de fabrication de celle-ci et dispositif optique équipé de l'unité de réflexion Download PDF

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Publication number
WO2013073862A1
WO2013073862A1 PCT/KR2012/009659 KR2012009659W WO2013073862A1 WO 2013073862 A1 WO2013073862 A1 WO 2013073862A1 KR 2012009659 W KR2012009659 W KR 2012009659W WO 2013073862 A1 WO2013073862 A1 WO 2013073862A1
Authority
WO
WIPO (PCT)
Prior art keywords
light
touch sensor
retroreflective
incident
paper
Prior art date
Legal status (The legal status 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 status listed.)
Ceased
Application number
PCT/KR2012/009659
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English (en)
Korean (ko)
Inventor
이주형
성평용
박용민
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Optis
Original Assignee
Optis
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 Optis filed Critical Optis
Publication of WO2013073862A1 publication Critical patent/WO2013073862A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • G—PHYSICS
    • G06—COMPUTING OR CALCULATING; 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
    • G06F3/0423—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 using sweeping light beams, e.g. using rotating or vibrating mirror

Definitions

  • Reflector for touch sensor models with retroreflective paper manufacturing method thereof, and optical device including the reflector
  • the present invention relates to a reflective part for a touch sensor module, a manufacturing method thereof, and an optical device for a touch screen including the reflective part, which is used for a display.
  • Touch screen is a technology that has been used for a long time in banks' automated equipment systems, etc., and is becoming more familiar to the general public due to the recent proliferation of smartphones.
  • Touch screen technologies used in mobile phones, personal computers or various displays include resistive films, capacitive and optical technologies, and their disadvantages are as follows.
  • Resistive touchscreens use a controller and a special coated glass plate to create a touch connection to the display surface.
  • the touch screen panel consists of two thin electrically conductive plates, and the two plates are separated with a narrow gap in between. The two panels are connected by pressing a specific point on the outer surface of the panel with an input means such as a finger and then touching the electric current. It causes a change that is perceived as an event.
  • the advantage of the resistive coating is that it can be accessed using a finger (without gloves), a pen, a stylus, or a hard object, but the image sharpness is reduced and the wear of the resistive plate requires periodic recalibration. Due to the scratches, it may not be suitable in public places, and it is easy to be damaged, and there is a disadvantage that the touch is not recognized when the resistance plate is broken or a groove is formed.
  • Capacitive touch screens are all made of glass and have higher definition and durability than resistive technology. There is a disadvantage in that it is vulnerable to the noise signal by detecting the minute current flowing in accordance with the change of capacitance between the sensor electrode and the finger, but it is strong in environmental reliability and mechanically by changing the upper barrier layer. Reliability can also be changed freely.
  • the capacitive touchscreen is only active when you touch it with a human finger, so scratching the screen coating will create a dead spot on the screen that will not recognize a gloved finger, a pen, a stylus, or a hard object and will not scale easily to large screens. There are disadvantages.
  • the optical touch screen is a light source that emits light horizontally on the screen surface.
  • the optical sensor detects the reflected light reflected from the reflective film and tracks the movement of all objects adjacent to the screen. Even without directly pressing the surface of the screen, the object is recognized very accurately, and no special coating or film is required on the screen, so there is no groove, wear or blur on the display image. That's because optical methods, with an optical sensor on either side of the screen or on a specific surface, are "seeing" objects that touch the screen.
  • optical touch technology can easily touch the screen with a finger or a pen due to its excellent precision, and can be recognized even if the finger or the pen approaches the screen surface so that light incident horizontally on the screen surface is covered by the finger or the pen.
  • optical touch technology is an economical way to add touch functionality to any display, and because it uses the same technology for large and small screens regardless of the screen size, it can be expected to be particularly cost-effective on large screens. .
  • Korean Laid-Open Patent Publication No. 10-2008-0049454 is characterized by comprising a saw blade-shaped base film layer, a reflective layer formed on the base film layer, and a protective layer formed on the reflective layer.
  • Reflecting means comprising a retroreflective film is disclosed.
  • the prior art as described above does not solve the problem that the reflection efficiency decreases as the incident angle increases by arranging base blades having the same saw blade shape and forming a reflective layer thereon regardless of the change of the incident angle. there is a problem.
  • the present invention has been made to solve the above problems, and the light reflection efficiency can maintain a constant value even when the incident light incident in the direction parallel to the screen is incident on the reflecting portion is increased by a predetermined angle or more.
  • An optical device employing a reflective portion, a method of manufacturing the same, and a reflective portion thereof are provided.
  • the present invention is a reflection unit for the touch sensor module, the reflection unit for the touch sensor module lower A lock, a transmissive cover covering the lower block, and a retroreflective paper interposed between the lower block and the transmissive cover, wherein the upper surface of the transmissive cover is flat, and the retroreflective paper enters the transmissive cover from the touch sensor hair.
  • Steps are interposed so that a step is formed from a portion where the incident angle of the light is 35 degrees or less, and the steps are in the form of a sawtooth, and the slope is formed such that the incident angle of the light incident on the inclined plane to which the light of the retroreflective paper is incident is 35 degrees or less,
  • the inclination increases as the incident angle of light incident from the touch sensor hairs onto the protective transmission cover upper surface increases, thereby providing a reflector for touch sensor hairs.
  • the present invention also provides a reflective part for touch sensor hair, wherein the transparent cover material is selected from the group consisting of epoxy molding, polycarbonate and acrylic.
  • the present invention also provides a reflector for touch sensor thermostats interposed on an inclined surface on which light is incident.
  • the present invention also has a lower surface of the transmissive cover is formed in the same shape as the upper surface of the lower block, the retroreflective is interposed in a manner that is engaged between the transparent cover and the lower block, for the touch sensor It provides a reflector.
  • the present invention also provides a reflector for touch sensor heads, wherein the retroreflective paper is attached to the lower block having a tooth-shaped step.
  • the present invention also provides a reflection unit for touch sensor hair, wherein the retroreflective paper is attached to an edge of the bottom surface of the transparent cover having a tooth-shaped step.
  • the present invention also provides a reflection unit for touch sensor hair, wherein the retroreflective paper is attached to a surface on which the incident light on the lower surface of the transmission cover on which the tooth-shaped step is formed is not incident.
  • the present invention also provides an optical device for a display including the reflection unit and the touch sensor heads of any one of the above-mentioned touch sensor heads.
  • the present invention also provides a touch sensor module comprising a plurality of optical scanning devices and a driving circuit unit, wherein the optical scanning device comprises: a light source for generating monochromatic light; A collimator lens configured to advance the light emitted from the light source into parallel light or convergent light; A deflection prism positioned in line with the light source and the collimator lens and changing a direction of parallel light or convergent light emitted from the collimator lens at a predetermined angle; A light splitter which sends a part of the light from the deflection prism to the inclined mirror and sends a part of the light reflected through the inclined mirror to the collimator lens for the photo detector; A collimator lens for photodetector for propagating the light from the light splitter to convergent light; Prize A photo splitter, in line with the collimator lens for the photo detector, and a photo detector positioned opposite the collimator lens with the deflection prism therebetween; An inclined mirror which is formed to be inclined at
  • the driving circuit unit controls the light source, the detector, and the motor, and provides an optical device for display, which is connected to the optical scanning device.
  • the touch sensor module comprises two optical fiber
  • Two optical scanning devices provide optical devices for display use, which are located at both sides with the driving circuit portion interposed therebetween.
  • the present invention also provides an optical device for display, wherein the light source is a laser diode or an LED that generates visible or infrared light.
  • the present invention also provides an optical device for display, wherein the touch sensor caps further include a housing for accommodating the touch sensor caps.
  • the present invention also provides a method of manufacturing a reflector for touch sensor hair, comprising the steps of: preparing a lower block; Interposing a retroreflective paper on an upper surface of the lower block; And covering a transparent cover on an upper surface of the retroreflective paper.
  • the present invention also provides a method of manufacturing a reflective part for touch sensor hair, wherein the covering of the transparent cover on the upper surface of the retroreflective paper is a step of pouring and curing epoxy to form an epoxy molding layer.
  • the present invention also provides a method of manufacturing a reflective part for touch sensor hair, comprising: preparing a light transmitting block having a plurality of reflection holes therein; Inserting a retroreflective paper on a lower surface of the reflective hole; And inserting an epoxy into an empty space of an upper surface of the retroreflective paper inserted into the reflection hole and curing the epoxy molding layer to form an epoxy molding layer.
  • the reflector for the touch sensor heads having the original reflector and the optical device including the same have a light emitted from the touch sensor heads positioned on one side of the touch screen due to its structural features.
  • the reflection efficiency of the retroreflected light is prevented from being reduced even at the point where the incident angle is large. It is possible to reduce the error of input or manipulation through touch on the screen.
  • FIG. 1 is an exemplary view illustrating an optical apparatus for a display provided with a reflecting unit including a touch sensor hair and a retroreflective paper according to an embodiment of the present invention.
  • FIG. 2 is an exemplary view showing one tooth of a reflecting part having a toothed inclined surface according to an embodiment of the present invention.
  • FIG. 3 is an exemplary view illustrating a reflector including a lower block, a retroreflective paper, and a transmissive cover in which a step is not formed according to an embodiment of the present invention.
  • FIG. 4 is an exemplary diagram showing retroreflective comparison with specular and diffuse reflection.
  • FIG. 5 is an exemplary diagram illustrating an internal structure of a retro prism type of micro prism type according to an embodiment of the present invention.
  • FIG. 6 is an exemplary view showing an internal structure of a retroreflective glass of glass bead type according to another embodiment of the present invention.
  • FIG. 7 is a retroreflective paper according to an embodiment of the present invention . It is an exemplary figure which shows the reflector which is a shape attached to the lower block in which the tooth-shaped step
  • FIG. 8 is a bottom surface of the transparent cover according to an embodiment of the present invention is formed in the same shape as the upper surface of the lower block, the shape of the retro-reflective paper is interposed in such a way that is engaged between the transparent cover and the lower block. It is an exemplary figure which shows a reflecting part.
  • FIG. 9 is an exemplary view illustrating a reflective part having a shape where a retroreflective paper according to an embodiment of the present invention is attached to an edge of a bottom surface of a transmissive cover having a tooth-shaped step, and an edge of an adhesive part.
  • the illustrated example is (b).
  • FIG. 10 is an exemplary view of a retroreflective paper according to an embodiment of the present invention showing a reflector having a shape where a retro-reflective paper is attached to a surface where incident light from a bottom surface of a transmission cover having a tooth-shaped step is not incident.
  • Exemplary diagram (b) shows a surface on which the incident light, which is an adhesive portion, does not enter.
  • the retroreflective paper according to an embodiment of the present invention is formed in the same shape as the upper surface of the lower block having a stepped tooth shape, and then cured by pouring an epoxy molding liquid instead of a separate transparent cover. It is an illustration.
  • the step shape of the sawtooth type It is an exemplary view showing that the same shape as the upper surface of the lower block is formed, and the epoxy molding solution is poured by curing after discontinuously covering only the inclined surface portion without covering the retroreflective paper on the entire upper surface of the lower block.
  • FIG. 13 illustrates a method of forming a retroreflective paper according to an embodiment of the present invention, but first manufacturing an entire block in which the upper and lower portions are integrated, and then attaching the retroreflective paper to the position of a hole in the block. Illustrated as shown.
  • FIG. 14 is an exemplary view illustrating an optical device for display (a) and touch sensor hairs (b) provided with touch sensor hairs and a reflector according to the present invention.
  • FIG. 15 is a perspective view (a) illustrating a configuration and an optical path of a light scanning apparatus included in a touch sensor mode according to an embodiment of the present invention, and (b) illustrates the configuration and an optical path of (a). It's a side shave.
  • the present inventors arrange the longitudinal section of the retroreflective paper interposed between the transmission cover and the bottom block so as to be serrated, the retroreflective paper which is a surface on which the transmitted light incident on the reflecting portion is reflected.
  • the present invention has been found to minimize the reduction in the efficiency of the reflected light while protecting the retroreflective glass which is the reflective cover.
  • the invention is directed to a reflector for a touch sensor module for use in a display.
  • Reflector 30 according to an embodiment of the present invention is a lower block 115, a transparent cover 105 covering the lower block and a retroreflection film (retroreflection film interposed between the lower block and the transparent cover, 110, wherein the transparent cover upper surface 120 is a flat surface, and the retroreflective light is an angle of incidence ⁇ of the light 50 incident from the touch sensor hair to the transparent cover at a constant angle, for example, 35 degrees. It interposes so that a level
  • step difference may be formed from the following part.
  • the upper surface of the transmissive cover means an incident surface of the incident light, and the incident angle is an angle between the incident light and the normal line 90 91 of the boundary between the two media at the incident point.
  • the incident angle of the light incident on the retroreflective paper is 0 degrees, the reflection efficiency is the highest and the efficiency decreases as the incident angle increases, and then rapidly decreases to 35 degrees. This is because it is necessary to keep it at 35 degrees or more.
  • Incline according to another embodiment of the present invention
  • the surface forming start can be made at any angle where the incident angle of light incident on the transmissive cover is 35 degrees or less, for example, from 20 degrees or less.
  • the reflective part for the touch sensor head may be installed and used in the display A, and the display usually includes a multi-sided surface.
  • the reflector for the touch sensor heads of the present application may be located on a plurality of side surfaces (lb, lc, Id) of a display, for example, a screen.
  • the retroreflective limb having the step difference of the reflective part for the touch sensor hair forms an inclined surface of the tooth shape 101 as shown in FIG. Incident angle (theta) 'with respect to the inclined surface of the light 50 which injects into the inclined surface of the sawtooth shape is smaller than when the inclined surface is not formed at the same position, it is possible to prevent the reduction of the reflection efficiency.
  • the reflecting portion of the portion where the step is not formed according to the exemplary embodiment of the present invention has a flat layered structure 30, and includes a lower block 115 and the lower block.
  • the cover includes a transmissive cover 105 and a retroreflective paper 110 interposed between the lower block and the transmissive cover.
  • a space 107 is formed at a portion where light passes between the retroreflective paper and the transmissive cover.
  • the transmissive cover or the lower block serves to maintain the shape of the retroreflective paper, and the retroreflective paper is a reflective paper having a function of retroreflecting the light incident from the light source and reflected back to the light source.
  • the transmission cover 105 may be manufactured by processing a material having good light transmission, for example, polycarbonate or acrylic.
  • FIG. 4 A conceptual diagram comparing retroreflective with specular and diffuse reflection is shown in FIG. 4.
  • Specular reflection is reflection that occurs when light enters a smooth glass surface, where light is reflected 51 in the direction opposite to the angle of light 50 incident on the surface of the object.
  • Diffuse reflections are reflections that occur when a light hits a rough surface, after which light is scattered in many directions (52), resulting in very little light returning to the light source.
  • Retroreflection refers to the reflection of light from a light source back to the light source, reflected from the surface of the object, and toward the light source (in the direction of the light source) regardless of the angle at which light is incident (50) onto the retroreflective material. This is reflected 55.
  • the retroreflective efficiency decreases, especially when it exceeds 35 degrees, the retroreflective efficiency rapidly decreases.
  • Retroreflective materials including retroreflective materials, are also made commercially.
  • the retroreflective paper 60 of one type includes a base film layer 63 having a saw blade shape, a reflective layer 62 formed on the base film layer 63, and It may be made of a protective layer 61 formed on the reflective layer 62.
  • the retroreflective paper 70 of another type includes a base film layer 73, a reflective layer 72 formed on the base film layer 73, and a high refractive glass egg layer 71 formed on the reflective layer 72. It may be made of).
  • Retroreflective paper may include a variety of forms, such as retroreflective fabric, retroreflective film, in one embodiment of the present invention was adopted [Scotchlite] of 3M.
  • the structure of the reflector 30 'positioned at a portion having an angle of incidence of 35 degrees or more among the reflectors for touch sensor hair according to the present invention is illustrated by enlarging the cross section of the reflector of the stepped portion in FIG. One is shown in FIGS. 7 to 10.
  • the reflector 30 'consisting of an inclined surface having a sawtooth-shaped longitudinal section of the lower block has a position at which the reflection efficiency of the retroreflective film decreases, and the light 50 incident from the touch sensor hair into the transmission cover 50.
  • the incident angle ⁇ of is formed from a point of 35 degrees, and more preferably, the incident angle ⁇ may be formed from a point of 20 degrees.
  • the transmissive cover 105 may be manufactured by processing a material having good light transmission, for example, polycarbonate or acrylic, as in the case of the reflective part of the portion where the step illustrated in FIG. 3 is not formed.
  • the inclined surface having a sawtooth-shaped longitudinal section of the retroreflective is formed so that the incident angle ( ⁇ ') of the light incident on the inclined surface is 35 degrees or less, more preferably The incident angle ⁇ 'incident on the inclined surface may be formed to be 20 degrees or less.
  • an upper surface of the transparent cover is provided.
  • the retroreflective surface 120 is made flat so that dust and dirt do not accumulate.
  • the upper surface of the lower block refers to the surface to which the retroreflective finger is attached.
  • epoxy is used to attach the retroreflective paper to the lower block.
  • the retroreflective paper 110 in order to fix the retroreflective paper 110 between the transparent cover 105 and the lower block 115, the retroreflective paper 110 is a transparent cover It may be interposed in a manner of engaging between the 105 and the lower block (115).
  • the angle of incidence of the light incident on the transmissive cover when reflecting from the retroreflective back and returns to the transmissive cover of FIG. It becomes smaller than the incident angle with respect to, and can effectively prevent the reduction of the efficiency of the light returned to the light source. Due to this effect, the light loss in the portion E shown in Figs. 8 to 10 becomes small.
  • the retroreflective paper 110 is formed under the transmission cover 105 having a stepped tooth-shaped step. It can also be attached to a face.
  • the bottom of the transparent cover refers to a surface on which the retroreflective paper is attached to the transparent cover, facing the upper surface of the transparent cover.
  • an adhesive may be used on all or part of the adhesive surface.
  • the retroreflective paper attached to the transmissive cover may be attached using an adhesive to an edge 130 at which light of an inclined surface does not reach.
  • the adhesive uses epoxy.
  • the upper surface of the lower block can be made flat in order to reduce costs, and a space 109 can be formed between the retroreflective paper and the lower block.
  • a space 109 can be formed between the retroreflective paper and the lower block.
  • the retroreflective sheet attached to the transmissive cover having a sawtooth-shaped step is a surface on which the incident light on the lower surface of the transmissive cover does not enter.
  • the retroreflective sheet may be attached using an adhesive.
  • the retroreflective sheet may occur when the entire retroreflective sheet is attached to a space corresponding to the reflective surface with an adhesive.
  • the external refractive index of can be prevented on the entire reflective surface due to the development.
  • the retroreflective paper 110 is formed in the same shape as the upper surface of the lower block 115 where the stepped teeth are formed, and does not use a separate transmissive cover member. It may be attached in other ways, that is, not in the manner of covering the transmissive cover 105 on the retroreflective 110, shown in Figures 8 to 10, the epoxy molding directly on the retroreflective (110) The method of pouring and curing the (Molding) solution is different.
  • the epoxy molding layer 117 formed by curing the epoxy serves as the transmission cover 105.
  • the retroreflective paper 110 may be attached to the upper surface of the lower block 115 using an adhesive such as epoxy.
  • the retroreflective paper 111 may be formed so as to discontinuously cover only the inclined surface portion without covering the entire upper surface of the lower block 115. That is, the retroreflective paper 111 is formed in such a way that only the inclined surface portion of the upper surface of the lower block 115 having a stepped shape having a robny shape is placed in pieces. In this case, it is not necessary to cover the retroreflective paper on the vertical plane of the step where no light is incident. Recursion After discontinuously placing the reflective paper 111 on the upper surface of the lower block 115, the epoxy molding liquid is poured and cured in the same manner as shown in FIG.
  • the epoxy molding layer 117 to act on the retroreflective limb 111 to serve as a transmissive cover instead of a separate transmissive cover member, the epoxy molding layer 117 to act on the retroreflective limb 111 to serve as a transmissive cover.
  • the retroreflective paper 111 does not need to be attached to the upper surface of the lower block 115 using an epoxy or an adhesive.
  • FIG. 13 without attaching the retroreflective paper on the lower block, first manufacturing the entire block integrated with the upper and lower parts, and then attaching the retroreflective paper at the position of the hole in the block. It can also be configured in such a way.
  • This scheme is illustrated sequentially in Figures 13 (a), (b) and (c).
  • the light transmission block 140 has a shape of a rectangular parallelepiped or a rectangular stick (Stick), the upper and lower thickness and the front and rear width is relatively narrow, the left and right direction is formed long.
  • the light transmission block 140 has a plurality of reflection holes (Hole) 150 that can be attached to the retroreflective discontinuously, each reflecting hole 150 is formed to form a serrated inclined surface.
  • the reflection holes 150 are arranged side by side along the left and right directions of the light transmission block 140, and the light transmission block 140 is a plurality of reflection holes 150, the light transmission portion that is not the reflection hole.
  • Layer 142 Next, as shown in (b), a piece of retroreflective paper 152 is attached to the lower surface of the reflection hole 150 inside the light transmitting block 140.
  • the retroreflective paper 152 is not necessarily attached to the lower surface of the reflective hole 150 with an adhesive or the like, but may be inserted only on the lower surface of the reflective hole.
  • the epoxy is molded into the remaining space of the reflection hole 150 to which the retroreflective paper 152 is attached or inserted so that there is no empty space. . Therefore, the inside of the reflective hole 150 in the light transmitting block 140 is filled with the retroreflective paper 152 and the epoxy molding layer 155 without a gap. In this manner, since the light transmissive feature 140 including the retroreflective paper 152 can be integrally manufactured, there is a process advantage.
  • the touch sensor module of the optical device for display including the reflective part for one of the touch sensor heads and the touch sensor heads according to the present invention includes a plurality of optical scanning devices 21 and 22. It includes, and receives the light reflected through the reflector 30 attached to the other side (lb, lc, Id) around one side (la) of the touch screen (A).
  • Displays that can be used herein include, for example, screens, TV screens, computer screens, and electronic fills. Plates, beam projectors and the like.
  • the touch sensor module 20 includes a driving circuit unit and a plurality of optical scanning devices 21 ⁇ 22, in particular two optical scanning devices, as shown in FIG. 14 (b). .
  • two optical scanning devices 21 and 22 are located at both sides of the driving circuit part 10.
  • the driving circuit unit 10 disposed between the plurality of optical scanning devices 21 and 22 drives the optical scanning device included in the touch sensor modules.
  • the positions of the operating points (X, y) of the display A are two optical scanning devices.
  • the touch sensor module of the present application grasps the angle detected by the first optical scanning device 21 and the second optical scanning device 22 through the amplification processing unit 12 of the driving circuit unit 10 so that two line segments cross each other. It works on the principle of recognizing the point as (X, y). That is, when a user touches a specific portion of the touch screen A with a finger or the like, a difference in reflected light generated by the finger or the like is detected by the photodetector so that light energy is converted into electrical energy to drive circuit unit 10. Is transferred to perform the operation, it is possible to perform accurate coordinate calculation through the central processing unit (12).
  • These touch sensor caps can be used in various fields such as TV screens, computer screen electronic blackboards, and projectors of various sizes.
  • each of the optical devices included in the touch sensor hair includes a light source 210, a collimator lens 230, and a deflection prism 241 that emit light.
  • the display gwangjangsajang can perform the function of the light transmitting unit and the light receiving unit for the incident light including the configuration as described above.
  • an infrared or visible light laser is used as the light
  • a laser diode (LD) or an LED is used as the light source.
  • a laser is used as the light source, and the diameter of the light passing through the collimating lens is about 2 dB or less.
  • a rear end of the light source 210 may be provided with a light amount adjusting unit for adjusting the amount of light emitted from the light source 210.
  • the light amount adjusting unit may adjust the amplitude, or intensity, of the light within a predetermined range according to the amount of light that the touch screen A can accommodate.
  • an optical attenuator for reducing the amount of light emitted or an optical density filter for filtering the light density to a desired amount is used as the light amount adjusting unit.
  • the collimator lens 230 from the light source 210 The incident divergent light is allowed to proceed as parallel light or converging light without spreading in all directions.
  • the deflection prism 241 is a device for changing the direction of light emitted from the light source 210 and is located in line with the light source and the collimator lens 230. In the embodiment of the present invention, the light emitted from the collimator lens 230 is turned by the deflection prism 241 at a predetermined angle and directed to the inclined mirror.
  • the deflection prism 241 changes the direction of light by 90 °.
  • the light whose direction of travel is changed in the deflection prism 241 is directed to the light splitter 221.
  • the light splitter 221 is installed between the deflection prism 241 and the inclined mirror 250.
  • the light splitter 221 sends a part of the light incident from the light source 210 and changed in the direction of the light by the deflection prism 241 to the inclined mirror 250, and returns from the reflector 30 to the inclined mirror.
  • Some of the light reflected back from the beam 25 is redirected to the collimator lens 235 for the photodetector while redirecting.
  • An inclined mirror 250 for reflecting the incident light transmitted through the light splitter 221 is positioned in contact with the motor 227.
  • the motor 227 rotates the inclined mirror 250, and in an embodiment of the invention the motor is a spindle motor.
  • the inclined mirror 250 is formed to be inclined at a predetermined angle to the exit surface of the light splitter 221 to reflect the incident light again.
  • the inclined mirror 250 changes the direction of light by 90 degrees.
  • the inclined mirror 250 has a triangular cross section in the optical axis direction, and is formed such that an angle formed at one side thereof with the other side connected to an end point of the one side is inclined at 45 °.
  • the light that has changed direction and passed through the light splitter 221 is redirected again after reaching the oblique bottom 250 and is emitted above the screen in parallel with the screen.
  • the light passing through the screen reaches the reflector 30 attached to one side la where the touch sensor module 20 is located and the other side lb, lc, Id.
  • the reflection to the inclined mirror 250 via the transparent protective film By the reflection to the inclined mirror 250 via the transparent protective film.
  • the light reflected by the tilt bridge 250 is directed to the light splitter 221 while the direction is changed, and the light splitter 221 redirects a part of the reflected light again while the collimator lens 235 and the photodetector for the photodetector are redirected.
  • the collimator lens 235 and the photodetector for the photodetector are redirected.
  • the photodetector collimator lens 235 and the photodetector 270 are positioned opposite the light source 210 and the collimator lens 230 with the deflection prism 241 and the light splitter 221 interposed therebetween. 210, it is not necessary to be located on the same axis as the collimator lens 230. Reflected light whose direction is changed by the light splitter 221 A portion of is no longer spread by the collimator lens 235 for the photodetector and proceeds to parallel light or converging light to reach the photodetector 270.
  • the photo detector 270 is a device for converting and detecting the light energy of the laser into electrical energy.
  • the photodetector 270 is in line with the light splitter 221 and the collimator lens 235 for the photodetector.
  • additional means may be provided to detect the synchronization of the spindle motor 227 rotation, which is the reference for signal detection.
  • a reflex reflector is installed at a predetermined position outside the screen region based on the area where light is scanned on the screen, and based on the signal of light reflected and detected by the reflex reflector. Rotational synchronization of the spindle motor 227 can be detected.
  • the driving circuit unit 10 is installed at one side of the optical scanning apparatuses 21 and 22 as shown in FIG. 14 (b), and the light source 210 and the detector ( 270 and the drive of the spindle motor 227 and the like.
  • the driving circuit unit 10 may be provided with respective controllers for controlling the driving of the detector 270, motor driving control units 13a and 13b, and light source control units 14a and 14b.
  • the driving circuit unit 10 may precisely control the spindle motor 227 through the motor driving control units 13a and 13b.
  • the driving circuit unit 10 further includes a central processing unit 12 capable of deciding the maximum sharpness in a range of a predetermined resolution by dividing the image displayed on the touch screen A. It can be judged from the error range.
  • the present invention provides the touch sensor head 20 and the reflector 30 for the display.
  • the touch sensor caps are located on one side, and the reflecting portion is the screen A.
  • the other side (lb, lc, Id) around one side (la) of the light emitted from the optical scanning device (21, 22) included in the touch sensor module and incident on the reflector (30, 30 ') Reflects and sends to the touch sensor head 20.
  • One or more reflectors may be used herein. For example, if one reflector covers all of the other sides (lb, lc, Id) in one sheet, one is included, but if a separate reflector is used for each side, depending on the number of sides provided with the reflector Multiple reflectors can be used, all of which are included in the scope of this application.
  • drive circuit 20 touch sensor module
  • optical scanning device 22 optical scanning device
  • collimator lens 241 for photodetector deflection prism

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • Human Computer Interaction (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Position Input By Displaying (AREA)

Abstract

La présente invention porte sur une unité de réflexion pour un module de détecteur tactile possédant une feuille rétro-réfléchissante et un dispositif optique équipé de l'unité de réflexion, un film réfléchissant ayant une section transversale verticale en forme de dents de scie étant agencé dans une plage dans laquelle l'angle d'incidence de la lumière incidente par rapport à l'unité de réflexion est grand, de sorte que l'efficacité de réflexion de la lumière peut être maintenue à une valeur constante même lorsque l'angle d'incidence de la lumière émise par le module de détecteur tactile devient supérieur à un angle donné, l'angle d'incidence étant formé lors de l'incidence sur l'unité de réflexion. Ainsi, une diminution de l'efficacité de réflexion d'une lumière rétro-réfléchie est empêchée au niveau du point présentant un angle d'incidence plus grand lorsque la lumière émise à partir du module de détecteur tactile positionné au niveau d'un côté d'un écran tactile est incidente sur l'unité de réflexion positionnée au niveau de l'autre côté de l'écran tactile. Ainsi, une erreur d'entrée ou une erreur opérationnelle provoquée lors du toucher d'un écran d'affichage peut être réduite.
PCT/KR2012/009659 2011-11-17 2012-11-15 Unité de réflexion pour module de détecteur tactile possédant une feuille rétro-réfléchissante, procédé de fabrication de celle-ci et dispositif optique équipé de l'unité de réflexion Ceased WO2013073862A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
KR10-2011-0119957 2011-11-17
KR20110119957 2011-11-17

Publications (1)

Publication Number Publication Date
WO2013073862A1 true WO2013073862A1 (fr) 2013-05-23

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PCT/KR2012/009659 Ceased WO2013073862A1 (fr) 2011-11-17 2012-11-15 Unité de réflexion pour module de détecteur tactile possédant une feuille rétro-réfléchissante, procédé de fabrication de celle-ci et dispositif optique équipé de l'unité de réflexion

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WO (1) WO2013073862A1 (fr)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2005128693A (ja) * 2003-10-22 2005-05-19 Canon Inc 座標入力装置及びその制御方法、プログラム
JP2007072587A (ja) * 2005-09-05 2007-03-22 Canon Inc 座標入力装置、座標入力装置の制御方法、制御プログラム及び記憶媒体
JP2007072501A (ja) * 2005-09-02 2007-03-22 Canon Inc 座標入力装置
KR100913758B1 (ko) * 2009-02-09 2009-08-24 호감테크놀로지(주) 터치 패널의 터치 위치 검출 장치

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2005128693A (ja) * 2003-10-22 2005-05-19 Canon Inc 座標入力装置及びその制御方法、プログラム
JP2007072501A (ja) * 2005-09-02 2007-03-22 Canon Inc 座標入力装置
JP2007072587A (ja) * 2005-09-05 2007-03-22 Canon Inc 座標入力装置、座標入力装置の制御方法、制御プログラム及び記憶媒体
KR100913758B1 (ko) * 2009-02-09 2009-08-24 호감테크놀로지(주) 터치 패널의 터치 위치 검출 장치

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