KR20100056117A - Apparatus for optical touch screen - Google Patents

Apparatus for optical touch screen Download PDF

Info

Publication number
KR20100056117A
KR20100056117A KR1020080115128A KR20080115128A KR20100056117A KR 20100056117 A KR20100056117 A KR 20100056117A KR 1020080115128 A KR1020080115128 A KR 1020080115128A KR 20080115128 A KR20080115128 A KR 20080115128A KR 20100056117 A KR20100056117 A KR 20100056117A
Authority
KR
South Korea
Prior art keywords
light
beam splitter
light receiving
column beam
touch screen
Prior art date
Application number
KR1020080115128A
Other languages
Korean (ko)
Inventor
김재영
노재헌
장동섭
Original Assignee
삼성전자주식회사
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 삼성전자주식회사 filed Critical 삼성전자주식회사
Priority to KR1020080115128A priority Critical patent/KR20100056117A/en
Publication of KR20100056117A publication Critical patent/KR20100056117A/en

Links

Images

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
    • G06F3/0304—Detection arrangements using opto-electronic means
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
    • G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
    • G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
    • G06F3/042—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by opto-electronic means
    • G06F3/0421—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by opto-electronic means by interrupting or reflecting a light beam, e.g. optical touch-screen

Landscapes

  • 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

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an optical touch screen device, comprising a light source for generating light and a plurality of beam splitters for reflecting a portion of the light generated from the light source, wherein the light travels through a portion of the plurality of beam splitters and the plurality of beam splitters. By intersecting the progress of the light reflected from the other part of the, it is possible to accurately grasp the position information of the indicating means while reducing the location where the light source is installed.

Description

Optical touch screen device {Apparatus for optical touch screen}

The present invention relates to a touch screen device, and more particularly to an optical touch screen using light.

The touch screen device is an input device that detects the position of the pointing means directly on the display screen so that an input corresponding to the position can be made.

Such touch screen devices include pressure sensitive touch screen devices and optical touch screen devices. The pressure sensitive touch screen device senses the position of the pointing means by using a change in the resistance value of the position of the resistance sheet to which pressure is applied using a pressure sensitive resister (PSR).

The optical touch screen device sets coordinates by dividing the touch screen horizontally and vertically, and independently installs a light emitting source or a light receiving sensor on the horizontal axis and the vertical axis of each coordinate to receive the light receiving sensor when the indicating means such as a finger is placed on the touch screen. The position of the indicating means is determined by using the received light signals generated by the.

On the other hand, such an optical touch screen device has a limitation in the resolution of the coordinates because there is a limit to the installation location of the light emitting source and the light receiving sensor. In order to overcome the shortcomings of the optical touch screen device, Korean Laid-Open Patent Publication No. 10-2007-0054607 discloses that a single light source or a plurality of light sources are installed at a single point or a plurality of light sources to generate a single light source. The laser light is distributed to the image sensor through an optical fiber installed at a position opposite to a single or a plurality of light sources, and the laser light is blocked by the indicating means at any position of the touch screen by performing image processing on the laser transmitted through the optical fiber. It has been proposed an optical touch screen device for acquiring the position of the indicating means by grasping whether or not.

However, the conventional optical touch screen device proposed in the aforementioned publication has a disadvantage in that the position of the indicating means cannot be accurately determined when one light source is used, and when a plurality of light sources are used, a plurality of light sources are used. This has the disadvantage of being installed.

The idea of the present invention is to provide an optical touch screen device that can accurately grasp the position information of the indicating means while reducing the location where the light source is installed.

To this end, the optical touch screen according to an embodiment of the present invention includes a light source for generating light and a plurality of beam splitters reflecting a part of the light generated from the light source, and the progress and the plurality of light reflected from a portion of the plurality of beam splitters. The propagation of light reflected from the other part of the beamsplitter of the intersects.

Here, the light source is a laser diode or LED that generates infrared light.

The plurality of beam splitters includes a first column beam splitter group and a second column beam splitter group. Here, the angle between the first column beam splitter group and the second column beam splitter group is approximately right angle. The light source is also disposed between the first column beam splitter group and the second column beam splitter group.

In addition, the light source may be adjacently connected to the first column beam splitter group and the second column beam splitter group, and disposed at one end of the connected first column beam splitter group and the second column beam splitter group. Here, a light propagation direction changing member for changing the light propagation direction is disposed between the first column beam splitter group and the second column beam splitter group.

The apparatus may further include a plurality of light receiving sensors generating a light receiving signal depending on whether the reflected light reflected by each of the plurality of beam splitters is received.

Here, a condenser lens for condensing the reflected light to the light receiving surface is disposed in front of the light receiving surface of each of the plurality of light receiving sensors.

The plurality of light receiving sensors include a first heat receiving sensor group and a second heat receiving sensor group, and an angle between the first light receiving sensor group and the second heat receiving sensor group is approximately right angle.

Each of the plurality of light receiving sensors receives the reflected light through the optical fiber, and the plurality of light receiving sensors are integrally formed. Here, a condenser lens for condensing the reflected light to the light receiving portion is disposed in front of the incident portion of the optical fiber.

As described above, the optical touch screen device according to the embodiment of the present invention can accurately grasp the location information of the indicating means while reducing the location where the light source is installed.

Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings.

1 to 3, an optical touch screen device 1 according to a first exemplary embodiment of the present invention includes a light source 10 for generating light, a part of light generated by the light source 10, and a part of the light reflected from the light source 10. And a plurality of beam splitters 20 which allow the progress of some of the reflected light reflected on the touch screen 2 and the other reflected light to intersect, and a signal according to whether or not the light reflected by each of the plurality of beam splitters 20 is received. The position of the indicating means in the touch screen 2 is determined by using the plurality of light receiving sensors 30 and the light receiving signals generated by the plurality of light receiving sensors 30 and the installation positions of the plurality of light receiving sensors 30. And a signal processor 50 for generating position information of the indicating means.

The touch screen 2 is disposed on the front surface of the display screen 3 such as the LCD 3a, which is a display device, and is a spatial area in which an instruction means such as a user's finger can be located at one point. Here, the display device includes a PDP, an OELD, and a CRT.

The light source 10 is disposed on one side of the touch screen 2 so as to prevent visible light generated from the display screen 3 such as the LCD 3a, which is a display device, from generating an infrared laser diode or an infrared LED. Is implemented. The light source 10 is controlled by the signal processing unit 50 to generate infrared light, and the incident ends of the first and second column beam splitter groups 20-1 and 20-2 are described. Exit at (20-1a, 20-2a). That is, the light source 10 includes the first light source element 11 and the second light source element 12 integrally, and the first light source element 11 is an incident end of the first column beam splitter group 20-1. The infrared light is emitted toward (20-1a), and the second light source element 12 emits infrared light toward the incidence end 20-2a of the second column beam splitter group 20-2. Here, the first and second light source elements 11 and 12 are not limited to infrared laser diodes and infrared LEDs, and equivalent means for generating infrared light may be used.

Each of the plurality of beam splitters 20 has an output part 22 having a material different from that of the incidence part 21 and the incidence part 21, and an interface 23 at which the incidence part 21 and the output part 22 interview each other. ). As shown in FIG. 2, each of the plurality of beam splitters 20 reflects a portion of the infrared light IRB incident from the incident part 21 toward the boundary surface 23, and the remaining infrared light is reflected on the boundary surface 23. Pass through the exit to the exit unit 22.

Some of the plurality of beam splitters 20 are arranged in a row to form the first row beam splitter group 20-1, and the others are arranged in a row to form the second row beam splitter group 20-2.

Each beam splitter 20 constituting the first and second row beam splitter groups 20-1 and 20-2 has a beam splitter 20 having a different output 21 from one beam splitter 20. It is connected in a manner that is connected to the incidence portion 21 of.

Meanwhile, a portion where the beam splitter 20 including the incidence portion 21 that is not connected to the other beam splitter 20 is disposed is formed in each of the first and second row beam splitter groups 20-1 and 20-2. The first and second row beam splitters are portions in which the beam splitters 20 including the output units 21 which are incident ends 20-1a and 20-2a and which are not connected to the other beam splitters 20 are arranged. Each of the groups 20-1 and 20-2 is an exit group 20-1b and 20-2b. The first and second column beam splitter groups 20-1 and 20-2 are the incidence end 20-1a and the second column beam splitter group 20-2 of the first column beam splitter group 20-1. ) Is provided on the upper frame 60 and the left frame 70 so that the incidence ends 20-2a of the () are adjacent to each other, and a light source 10 is provided therebetween.

Each of the beam splitters 20 constituting the first column beam splitter group 20-1 reflects reflected light parallel to each other toward the touch screen 2 from one side of the touch screen 2. In other words, infrared light is reflected at the boundary surface 23 of each beam splitter 20 constituting the first column beam splitter group 20-1 and travels along the vertical axis of the touch screen 2.

The second row beam splitter group 20-2 is disposed at right angles to the first row beam splitter group 20-1 to be parallel to each other toward the touch screen 2 and to the first row beam splitter group 20-1. Reflects the reflected light that intersects with the progress of the reflected light. Infrared light is reflected from the boundary surface 23 of each beam splitter 20 constituting the second row beam splitter group 20-2 and progresses along the horizontal axis of the screen 3.

The plurality of light receiving sensors 30 are implemented as photodiodes for generating a signal according to whether infrared light is received. Some of the plurality of light receiving sensors 30 are arranged in a line to form a first row light receiving sensor group 30-1, and another part of the plurality of light receiving sensors 30 is arranged in a line to form a second row light receiving sensor group 30-2. do. The first heat receiving sensor group 30-1 is installed in the lower frame 80, and the second heat receiving sensor group 30-2 is installed in the right frame 70.

A plurality of light condensing light in front of the light receiving surface 31 of each of the plurality of light receiving sensors 30 to collect the infrared light reflected by each beam splitter 20 on the light receiving surface 31 of each of the plurality of light receiving sensors 30 Lens 40 is provided, respectively.

Each condenser lens 40, as shown in Fig. 3, includes a light receiving limiter 41 to receive only infrared light from a limited area. The light receiving limiter 41 prevents external light from being incident on each of the plurality of light receiving sensors 30, thereby improving reliability of signal generation depending on whether or not the reflected light of the plurality of light receiving sensors 30 is received.

The signal processing unit 50 uses the signals input from the plurality of light receiving sensors 30 and the installation positions of the respective light receiving sensors 30 to determine the position of the indicating means on the touch screen 2, and thus the indicated instructions The position information of the means is sent to a central processing unit (CPU), such as a computer, on which the touch screen device according to the first embodiment of the present invention is mounted.

Hereinafter, the operation of the optical touch screen device according to the first embodiment of the present invention will be described with reference to the accompanying drawings.

Referring to FIG. 4, first, when the signal processing unit 50 controls the light source 10 to generate infrared light, the light source 10 includes the first and second column beam splitter groups 20-1 and 20-2. Infrared light is emitted to the incident ends 20-1a and 20-2a. In other words, the first light source element 11 of the light source 10 emits infrared light to the incident end 20-1a of the first column beam splitter group 20-1, and the second light source of the light source 10. The element 12 emits infrared light to the incident end 20-2a of the second column beam splitter group 20-2.

The infrared light incident on the incident end 20-1a of the first column beam splitter group 20-1 passes through each beam splitter 20 constituting the first column beam splitter group 20-1 sequentially. In addition, some infrared light is reflected from each beam splitter 20 constituting the first column beam splitter group 20-1 and travels along the vertical axis of the touch screen 3. In addition, infrared light incident to the incidence end 20-2a of the second column beam splitter group 20-2 passes sequentially through each beam splitter 20 constituting the second column beam splitter group 20-2. In addition, some infrared light is reflected from each beam splitter 20 constituting the second column beam splitter group 20-2 and travels along the horizontal axis of the screen 3.

On the other hand, if there is no object such as the indicating means (O) on the touch screen 2, all of the plurality of light receiving sensors 30 receives the infrared light and transmits a signal corresponding thereto to the signal processor 50. Accordingly, the signal processor 50 determines that there is no object such as the indicating means on the screen 3, and does not generate the position information of the indicating means.

On the contrary, the instruction means O causes the traveling path of the reflected light of the beam splitter n20 corresponding to the n-th of the first column beam splitter group 20-1 on the screen 3 and the second column beam splitter group 20. When the traveling path of the reflected light of the beam splitter m20 corresponding to the m th of -2) intersects, the indicating means O corresponds to the n th of the first column beam splitter group 20-1. The reflected light of the beam splitter n20 and the reflected light of the beam splitter m20 corresponding to the m th of the second column beam splitter group 20-2 are blocked. Accordingly, the light receiving sensor n30 corresponding to the nth of the first light receiving sensor 30-1 and the light receiving sensor m30 corresponding to the mth of the second column receiving sensor group 30-2 are signal processing units. At 50, no light reception signal is generated.

The signal processor 50 corresponds to the mth of the light receiving sensor n30 corresponding to the nth of the first light receiving sensor 30-1 and the second light receiving sensor group 30-2 that do not transmit the light receiving signal. A central processing unit such as a computer equipped with a touch screen device according to the first embodiment of the present invention by checking the light receiving sensor m30 and using the coordinates n and m as position information of the indicating means O. (CPU), etc.

Hereinafter, an optical touch screen device according to a second embodiment of the present invention will be described. However, the optical touch screen device will be described in detail only in comparison with the first embodiment of the present invention.

Referring to FIG. 5, in the optical touch screen device according to the second embodiment of the present invention, the incident end 20-1a of the first column beam splitter 20-1 and the second column beam splitter 20-2 are provided. The exit ends 20-2b are disposed adjacent to each other.

The second row beam splitter 20-2b is disposed between the incidence end 20-1a of the first row beam splitter group 20-1 and the exit end 20-2b of the second row beam splitter 20-2. The light propagation direction changing member 150 is installed such that all of the light emitted from the exit end 20-2b of the beam enters the entrance end 20-1a of the first column beam splitter 20-1.

The light source 10 is installed adjacent to the incidence end 20-2a of the second row beam splitter 20-2, and emits infrared rays to the incidence end 20-2a of the second row beam splitter 20-2. do. At this time, the light source 10 is of course composed of only one light source element (11).

The number of light source elements can be reduced by the optical touch screen device according to the second embodiment of the present invention.

Hereinafter, an optical touch screen according to a third embodiment of the present invention will be described, but the description will be limited to parts compared with the first embodiment of the present invention.

Referring to FIG. 6, the optical touch screen device according to the third embodiment of the present invention further includes a multi-sensor unit 120 in which a plurality of optical fibers 100 and a plurality of light receiving sensors 30 are integrally formed.

Each of the plurality of optical fibers 100 includes an incidence portion 101 and an emission portion 102. A portion of the plurality of optical fibers 100 forms the first thermo-optic fiber stage 100-1, and the other portion forms the second thermo-optic fiber stage 100-2.

The incidence portions 101 of each of the optical fibers 100 constituting the first thermal fiber stage 100-1 are installed in the lower frame 90 and the optical fiber 100 constituting the first thermal fiber stage 100-1. Each of the emission units 102 is connected to the light receiving surface 31 of some of the light receiving sensors 30 installed in the multi sensor unit 120. The incidence portions 101 of the optical fibers 100 constituting the second thermal fiber ends 100-2 are installed in the right frame 70 and the optical fibers 100 constituting the second thermal fiber ends 100-2. Each output unit 102 is connected to the light receiving surface 31 of a part of the light receiving sensor 30 installed in the multi-sensor unit 120.

And the multi-sensor unit 120 may be implemented as a CCD sensor consisting of a light receiving element of the plurality of light receiving sensors (30).

By the optical touch screen device according to the third embodiment of the present invention, the screen may have a small area. In other words, the optical touch screen device according to the third embodiment of the present invention may be installed in a display device having a small display screen.

1 is a plan view schematically showing an optical touch screen device according to a first embodiment of the present invention.

FIG. 2 is an enlarged view of A of FIG. 1.

3 is an enlarged view of a portion B of FIG. 1.

4 is a view for explaining the operation of the optical touch screen device according to a first embodiment of the present invention.

5 is a plan view schematically showing an optical touch screen device according to a second embodiment of the present invention.

6 is a plan view schematically showing an optical touch screen device according to a third embodiment of the present invention.

Description of the Related Art [0002]

2: touch screen 20: beam splitter

30: light receiving sensor 100: optical fiber

150: light traveling direction change member

Claims (12)

A light source for generating light, A plurality of beam splitters reflecting a part of the light generated from the light source, And a progression of the light reflected by a portion of the plurality of beamsplitters and the progress of the light reflected by another portion of the plurality of beamsplitters. The method of claim 1, The light source is an optical touch screen device that is a laser diode or LED for generating infrared light. The method of claim 1, The plurality of beam splitters includes an optical touch screen device including a first column beam splitter group and a second column beam splitter group. The method of claim 3, wherein And an angle between the first column beam splitter group and the second column beam splitter group is approximately right angle. The method of claim 3, wherein And the light source is disposed between the first column beam splitter group and the second column beam splitter group. The method of claim 3, wherein The light source is an optical touch screen device in which the first column beam splitter group and the second column beam splitter group are adjacently connected, and disposed at one end of the connected first column beam splitter group and the second column beam splitter group. . The method of claim 6, And a light propagation direction changing member for changing a light propagation direction between the first column beam splitter group and the second column beam splitter group. The method of claim 1, And a plurality of light receiving sensors generating a light receiving signal depending on whether the reflected light reflected by each of the plurality of beam splitters is received. The method of claim 8, And a condenser lens for condensing the reflected light to the light receiving surface in front of the light receiving surface of each of the plurality of light receiving sensors.  The method of claim 8, The plurality of light receiving sensors include a first row light receiving sensor group and a second row light receiving sensor group. And an angle between the first row light receiving sensor group and the second row light receiving sensor group is approximately a right angle. The method of claim 8, Each of the plurality of light receiving sensors receives the reflected light through an optical fiber, And the plurality of light receiving sensors are integrally formed. The method of claim 11, And a condenser lens for condensing the reflected light to the light receiving unit in front of the incident part of the optical fiber.
KR1020080115128A 2008-11-19 2008-11-19 Apparatus for optical touch screen KR20100056117A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1020080115128A KR20100056117A (en) 2008-11-19 2008-11-19 Apparatus for optical touch screen

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1020080115128A KR20100056117A (en) 2008-11-19 2008-11-19 Apparatus for optical touch screen

Related Child Applications (1)

Application Number Title Priority Date Filing Date
KR1020150084946A Division KR20150079510A (en) 2015-06-16 2015-06-16 Apparatus for optical touch screen

Publications (1)

Publication Number Publication Date
KR20100056117A true KR20100056117A (en) 2010-05-27

Family

ID=42280334

Family Applications (1)

Application Number Title Priority Date Filing Date
KR1020080115128A KR20100056117A (en) 2008-11-19 2008-11-19 Apparatus for optical touch screen

Country Status (1)

Country Link
KR (1) KR20100056117A (en)

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2012018179A2 (en) * 2010-08-02 2012-02-09 Lg Innotek Co., Ltd. Camera module and optical touch screen using the same
WO2012023706A2 (en) * 2010-08-17 2012-02-23 Lg Innotek Co., Ltd. Camera module and optical touch screen using the same
KR20120021695A (en) * 2010-08-13 2012-03-09 엘지전자 주식회사 Mobile terminal
KR101135277B1 (en) * 2010-09-07 2012-04-12 최도희 Infrared touch screen devices
KR101236200B1 (en) * 2011-02-23 2013-02-22 주식회사 에이에프오 Touch screen using multi reflection
KR101296722B1 (en) * 2010-11-24 2013-08-20 최도현 Touch screen device using optical fiber
CN103268173A (en) * 2013-05-30 2013-08-28 京东方科技集团股份有限公司 Infrared touch screen
KR101491430B1 (en) * 2011-11-28 2015-02-11 네오노드, 인크. Optical elements with alternating reflective lens facets
US9086761B2 (en) 2010-12-27 2015-07-21 Samsung Display Co., Ltd. Display apparatus
WO2017030397A1 (en) * 2015-08-18 2017-02-23 주식회사 엠오에스 (Mos) Display device having optical touch screen function

Cited By (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8976157B2 (en) 2010-08-02 2015-03-10 Lg Innotek Co., Ltd. Camera module and optical touch screen using the same
WO2012018179A3 (en) * 2010-08-02 2012-03-29 Lg Innotek Co., Ltd. Camera module and optical touch screen using the same
WO2012018179A2 (en) * 2010-08-02 2012-02-09 Lg Innotek Co., Ltd. Camera module and optical touch screen using the same
KR20120021695A (en) * 2010-08-13 2012-03-09 엘지전자 주식회사 Mobile terminal
WO2012023706A2 (en) * 2010-08-17 2012-02-23 Lg Innotek Co., Ltd. Camera module and optical touch screen using the same
WO2012023706A3 (en) * 2010-08-17 2012-04-12 Lg Innotek Co., Ltd. Camera module and optical touch screen using the same
US8976156B2 (en) 2010-08-17 2015-03-10 Lg Innotek Co., Ltd. Camera module and optical touch screen using the same
KR101135277B1 (en) * 2010-09-07 2012-04-12 최도희 Infrared touch screen devices
KR101296722B1 (en) * 2010-11-24 2013-08-20 최도현 Touch screen device using optical fiber
US9086761B2 (en) 2010-12-27 2015-07-21 Samsung Display Co., Ltd. Display apparatus
KR101236200B1 (en) * 2011-02-23 2013-02-22 주식회사 에이에프오 Touch screen using multi reflection
KR101491430B1 (en) * 2011-11-28 2015-02-11 네오노드, 인크. Optical elements with alternating reflective lens facets
CN103268173A (en) * 2013-05-30 2013-08-28 京东方科技集团股份有限公司 Infrared touch screen
CN103268173B (en) * 2013-05-30 2016-06-01 京东方科技集团股份有限公司 A kind of infrared touch panel
WO2017030397A1 (en) * 2015-08-18 2017-02-23 주식회사 엠오에스 (Mos) Display device having optical touch screen function

Similar Documents

Publication Publication Date Title
KR20100056117A (en) Apparatus for optical touch screen
US7629968B2 (en) Methods and systems for detecting selections on a touch screen display
KR100910024B1 (en) Camera type touch-screen utilizing linear infrared emitter
US8130210B2 (en) Touch input system using light guides
JP5308359B2 (en) Optical touch control system and method
JP5459689B2 (en) Optical touch screen
US20100245292A1 (en) Optical detection apparatus and method
TWI430152B (en) Optical coordinate input apparatus
EP2237136A1 (en) Optical detection apparatus and method
JP5837580B2 (en) Infrared light emitting diode and touch screen
JP2013143127A (en) Display device and input device having light emission patterns in plurality of layers
US20140009367A1 (en) Method for determination of head position relative to rectangular axes for observer equipped with head-mounted module
TW201030582A (en) Display system having optical coordinate input device
KR101615537B1 (en) Apparatus for Touch Screen using 3D Position
CN102103439B (en) Optical waveguide with light-emitting element and optical touch panel with same
KR20100066671A (en) Touch display apparatus
CN102117153B (en) Coordinate locating method, coordinate locating device, and display apparatus comprising coordinate locating device
JP6837496B2 (en) Touch panel
JP6946345B2 (en) Multi-function sensing system
TWI472988B (en) Optical touch-sensing system and method
KR20150079510A (en) Apparatus for optical touch screen
CN102063228B (en) Optical sensing system and touch screen applying same
JP2005344955A (en) Impact point measuring device
KR101236200B1 (en) Touch screen using multi reflection
KR100993602B1 (en) Camera type touch-screen utilizing light guide media of camera part and method for operating the same

Legal Events

Date Code Title Description
A201 Request for examination
E902 Notification of reason for refusal
E601 Decision to refuse application
A107 Divisional application of patent
J201 Request for trial against refusal decision
J301 Trial decision

Free format text: TRIAL DECISION FOR APPEAL AGAINST DECISION TO DECLINE REFUSAL REQUESTED 20150616

Effective date: 20160229