KR20170003196A - Touch screen using laser reflection - Google Patents

Touch screen using laser reflection Download PDF

Info

Publication number
KR20170003196A
KR20170003196A KR1020150093561A KR20150093561A KR20170003196A KR 20170003196 A KR20170003196 A KR 20170003196A KR 1020150093561 A KR1020150093561 A KR 1020150093561A KR 20150093561 A KR20150093561 A KR 20150093561A KR 20170003196 A KR20170003196 A KR 20170003196A
Authority
KR
South Korea
Prior art keywords
laser
contact portion
touch screen
reflection
display panel
Prior art date
Application number
KR1020150093561A
Other languages
Korean (ko)
Inventor
장희석
Original Assignee
주식회사 오리온티엠
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 주식회사 오리온티엠 filed Critical 주식회사 오리온티엠
Priority to KR1020150093561A priority Critical patent/KR20170003196A/en
Publication of KR20170003196A publication Critical patent/KR20170003196A/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
    • G06F3/041—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

The present invention relates to a touch screen using laser reflection, comprising: a display panel formed to output a screen; a contact portion formed on a front surface of the display and attached with a glass so that a user can touch the screen; A position detecting module formed of a laser emitting device and a light receiving device and sensing a position of contact with the contact portion, a reflecting device having a slope formed on both side and lower edges of the contact portion to reflect the laser emitted from the position detecting module, And a control unit configured to recognize a position of the contact unit contacted through the position sensing module and recognize the position of the contact unit.

Description

[0001] Touch screen using laser reflection [

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a touch screen using laser reflection, and more particularly, to a touch screen using laser reflection to emit a laser and receive a reflected laser to confirm a contact position.

In general, when a touch or a hand or object touches a character or a specific position on the screen without using a keyboard, the touch screen can receive the input data directly from the screen It is a screen that makes.

In order to realize a touch screen, a pressure sensitive type and an electrostatic type are used in the past. In the pressure sensitive type, when the pressure is generated by pressing the screen using a pen for a user's hand or a touch screen, two layers of electricity, The current and the resistance are changed and the position is grasped. As a result, various layers are adhered on the liquid crystal and the sharpness of the screen is decreased. When the pressure is high, the layer may be damaged and the touch feeling is dull.

In the case of electrostatic type, when the touch screen is contacted with a conductive finger or a conductive object in a state where a current-passing compound is coated on the liquid crystal, electrons flowing in the liquid crystal move to the body, The sensor attached to the sensor measures changes in the electron and measures the coordinates. Although it has high clarity and accuracy as compared with the pressure sensitive type, it has a conductive property so that it can be touched and the sensor is sensitive and malfunction occurs depending on the environment.

Korean Patent Laid-Open No. 10-2015-0024705 for solving this problem relates to an infrared touch screen device including an offset removing circuit, and an infrared touch screen device including an offset removing circuit includes a substrate having a touch sensing area, A light receiving unit disposed on one side of the substrate for emitting light, a light receiving unit for receiving divergent light from the light emitting unit and disturbance light emitted from the outside, a light receiving unit driving circuit for converting the amount of light received by the light receiving unit into an electrical signal, And an offset eliminating circuit for eliminating an electrical signal for the disturbance light in an electrical signal with respect to the converted light quantity. The offset voltage generated by the disturbance light is originally removed through a hardware offset eliminating circuit to reduce the touch error, It is possible to overcome the limitations of the signal processing and to have some disturbance light And more particularly, to an infrared touch screen device including an offset elimination circuit having a more improved touch sensing function.

However, in the related art, the light emitting unit and the light receiving unit must be formed to be symmetrical, resulting in a problem that the screen becomes bulky.

Also, according to the related art as described above, when a part of the light emitting units fails to emit light, the position can not be recognized. Therefore, there is a problem that the light emitting unit needs to be replaced by disassembling the touch screen.

Korean Patent Publication No. 10-2015-0024705

SUMMARY OF THE INVENTION It is an object of the present invention to overcome the above-mentioned problems by providing a touch screen using laser reflection, which can reduce the volume of the touch screen and simplify the repair by forming the laser light emitting part and the light receiving part at the same position.

Another object of the present invention is to provide a touch screen using laser reflection capable of emitting light in all regions of a display panel and capable of rapidly recognizing a position where the light is emitted from the touch screen.

It is another object of the present invention to provide a touch screen using laser reflection to reduce vibration generated when a touch screen is contacted, thereby preventing a device for emitting a laser from malfunctioning.

According to an aspect of the present invention, there is provided a touch screen using laser reflection, comprising: a display panel formed to output a screen; a contact portion formed on a front surface of the display and attached with a glass so that a user can touch the screen; A position sensing module disposed at the upper center of the sensor module and configured to detect a position of the laser light emitting device and the light receiving device contacting the contact portion; And a control unit configured to recognize a position of the contact unit contacted through the position sensing module and recognize the position of the contact unit.

In addition, the position sensing module of the touch screen using the laser reflection of the present invention includes a module jig formed in a "C" shape so as to emit and receive a laser toward the opened portion, And a bracket coupled to the frame of the display panel so as to be positioned.

The contact portion of the touch screen using the laser reflection of the present invention is characterized in that when the touch screen is attached to the display panel, the position detecting module is prevented from malfunctioning by reducing the vibration generated when the contact portion touches the contact portion using a buffer material at the edge.

In addition, the material of the reflection device of the touch screen using the laser reflection of the present invention is processed so as to form a tilt using acryl, and a reflective film is attached to the inclined surface so that the laser can be reflected.

Further, in the position sensing module of the touch screen using laser reflection according to the present invention, the laser light emitting device may be formed in more than one, and when the light emitting device has more than two light emitting devices, And a position to be contacted through light reception can be simultaneously recognized.

In addition, the reflection device disposed on both sides of the contact portion of the touch screen using the laser reflection of the present invention is formed so that the inclination decreases as it goes down from the top to the bottom, and the reflection device located on the bottom surface is formed to be symmetrical with respect to the center, .

As described above, according to the touch screen using laser reflection according to the present invention, the laser light emitting portion and the light receiving portion are formed at the same position, thereby reducing the volume of the touch screen and facilitating the repair.

Further, according to the touch screen using the laser reflection according to the present invention, the laser can be emitted in the entire region of the display panel, and the position of contact with the touch screen can be quickly recognized because the light emission period is fast.

Further, according to the touch screen using the laser reflection according to the present invention, it is possible to reduce the vibration generated when the touch screen is contacted, thereby preventing the device emitting the laser from malfunctioning.

1 is a perspective view illustrating an internal structure of a touch screen using laser reflection according to the present invention.
2 is a side view of a side view of a touch screen using laser reflection according to the present invention.
FIG. 3 is a front view showing a position sensing module of a touch screen using a laser reflection according to the present invention emitting a laser. FIG.
FIG. 4 is a rear view illustrating a position sensing module of a touch screen using laser reflection according to the present invention coupled to a display panel. FIG.
5 is a perspective view illustrating a module jig to which a position sensing module for a touch screen using laser reflection according to the present invention is attached.
6 is a perspective view illustrating a bracket to which a module jig of a touch screen and a display panel are coupled using laser reflection according to the present invention.
7 is a perspective view illustrating a reflection device inserted into a cover of a touch screen using laser reflection according to the present invention.
8 is a perspective view illustrating a case in which a case is mounted on a touch screen using laser reflection according to the present invention.

Specific features and advantages of the present invention will be described in detail below with reference to the accompanying drawings. The detailed description of the functions and configurations of the present invention will be omitted if it is determined that the gist of the present invention may be unnecessarily blurred.

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a touch screen using laser reflection, and more particularly, to a touch screen using laser reflection to emit a laser and receive a reflected laser to confirm a contact position.

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

FIG. 1 is a perspective view illustrating an internal structure of a touch screen using laser reflection according to the present invention.

As shown in FIG. 1, a touch screen using laser reflection according to the present invention includes a display panel 100 configured to output a screen, a display panel 100 formed on a front surface of the display, A position sensing module 300 positioned at the center of the upper portion of the display and formed of a laser emitting device and a light receiving device and sensing a position of contact with the contact portion 200; A reflection device 400 having a slope to reflect a laser beam emitted from the position sensing module 300 and a position sensing module 300 for sensing a position of the contact part 200, And a control unit (not shown) formed so as to be recognized by the control unit 100.

The display panel 100 is a device that outputs input data information as an image for visual representation. The display panel 100 implements an image using light emitting materials such as PDP, LCD, OLED, and plasma.

Since the display panel 100 can only output the input data, a separate input device must be provided in the display panel 100 so that the output image can be controlled or manipulated. In the present invention, Various devices are attached so that the display panel 100 can be touched.

The contact portion 200 is attached to the front surface of the display panel 100 in order to reduce the distortion of the image due to the pressure when the user touches the display panel 100 to output the image.

In addition, since the glass of the contact portion 200 is transparent, the contact portion 200 can be formed of tempered glass or high hardness plastic to prevent the glass from being damaged by touching while checking the screen through the glass.

Tempered glass is a glass which is heated by 500 ~ 600 ℃ near the softening temperature and quenched by compressed cooling air to compress and deform the glass surface part and tensile deformation of the inside. The bending strength is 3 ~ 5 It boasts 3 ~ 8 times stronger impact resistance and excellent heat resistance.

Since the hardness plastic of the contact portion 200 is two times higher than the hardness of a general plastic, the hardness is high even when the user touches the surface, so that scratches are not easily generated. Even if the weight of the product is reduced, And it is safe because it does not break even if it is impacted.

The position sensing module 300 is located above the front surface of the display panel 100 and includes a light emitting device for emitting a laser toward the surface of the contact portion 200 and a light receiving device for sensing the light when the emitted laser is reflected and returned .

The laser beam emitted from the light emitting device is reflected by the reflection device 400 formed on the front edge of the contact part 200 and returns to the recognition device 200 and recognizes that the contact part 200 is empty.

Also, when the user touches the contact portion 200, the light emitted from the light emitting device is blocked by the user's hand or an object, so that the light receiving device does not receive the laser, The user can input the position touched by the contact unit 200 to the display panel 100 and recognize the position.

The reflection device 400 is located at the front edge of the contact part 200 and is formed at a different inclination according to the position. The laser emitted from the light emitting device of the position sensing module 300 is reflected by the reflection device 400 to the light receiving device Reflection.

The control unit limits the range of the laser beam emitted from the light emitting device of the position sensing module 300 to the front of the contact unit 200. When the emitted laser beam is not received, Signal.

2 is a side view illustrating a side of a touch screen using laser reflection according to the present invention.

2, the contact portion 200 of the touch screen using the laser reflection according to the present invention is formed when the contact portion 200 is brought into contact with the contact portion 200 by using the buffer material 210 at the edge thereof when the touch screen is attached to the display panel 100 Thereby preventing the position sensing module 300 from malfunctioning.

When the contact portion 200 is directly attached to the display panel 100, vibration generated when the user touches the display panel 100 is transmitted to the display panel 100, and the position sensing module 300 located above the display panel 100 vibrates And may not be able to detect the position normally.

Therefore, when the contact portion 200 is attached to the front surface of the display panel 100, the vibration absorbing member 210 should be formed at the edge of the contact portion 200 so that the vibration absorbing member 210 can absorb sponge, rubber and urethane Or a material capable of absorbing vibrations can be used.

A cover 410 is attached to the front edge of the contact portion 200 so that a reflection device (not shown) can be inserted or removed. A detailed description of the cover 410 will be given later with reference to FIG.

FIG. 3 is a front view showing a position sensing module of a touch screen using a laser beam according to the present invention emitting a laser.

As shown in FIG. 3, the position sensing module 300 of the touch screen using laser reflection according to the present invention may include at least one laser emitting device, and in the case where there are two or more light emitting devices, So that the laser can be emitted and the position of contact through the light emission and the light reception of the laser can be simultaneously recognized.

In the case where the laser emitting device of the position sensing module 300 is formed as one, the laser is positioned in the center of the position sensing module 300 to emit the laser in the forward direction of the contact portion 200 and emit laser in the clockwise or counterclockwise direction The laser will sense the location where it is not reflected.

The laser emitted from the light emitting device is reflected by the reflection device 400 formed at the edge of the contact portion 200 and is recognized by the light receiving device in the order of the light emitted clockwise or counterclockwise.

In the case where there are two or more light emitting devices, each light emitting device emits light by designating a region for emitting laser by a control unit (not shown), and each light emitting device is formed so that the direction of rotation Is overlapped.

The light receiving device may be formed in the center of the position sensing module 300 so as to receive the laser beams emitted by the respective light emitting devices regardless of the number of the light emitting devices or separately form the light receiving devices in the respective light emitting devices It may be formed so as to detect an accurate position.

As shown in FIG. 3, in the case where there are two light emitting devices, each light emitting device emits laser continuously only in the area designated by the control part, so that the user can quickly detect the position touched by the user, and multi-touch is enabled.

Also, the position of the user touched to the contact portion 200 can be measured more accurately than when the light emitting device rotates in different directions to emit laser light over the entire area of the contact portion 200.

In addition, the reflection device 400 located on both sides of the contact portion 200 has a decreasing slope as it goes down from the top to the bottom, and the reflection device 400 located on the bottom surface is formed to be symmetrical with respect to the center, .

The reflection device 400 may be attached to the front surface of the contact part 200 so that the light emitted from the light emitting device of the position sensing module 300 can be received by the light receiving device.

Further, in the case of the reflection device 400 formed on both sides of the contact part 200, the laser may not be received by the light receiving device when the inclination is formed on the upper part. Therefore, the reflection device 400 should be formed flat, So that the laser can be received by the light receiving device.

In the case of the reflection device 400 formed at the lower part, the laser device is formed to be symmetrical with respect to the center and to be formed so that the slope decreases as the laser device moves from both ends to the center, so that the laser device can be reflected toward the light receiving device.

The surface of the reflecting device 400, which is not inclined on both sides and the bottom of the reflecting device 400, can be used by forming a slope as necessary in order to reflect the position of the light receiving device or the laser.

4 is a rear view illustrating a position sensing module of a touch screen using laser reflection according to the present invention coupled to a display panel.

As shown in FIG. 4, the position sensing module 300 of the touch screen using laser reflection according to the present invention includes a module jig 310 formed in a "C" shape so as to emit and receive a laser toward the opened portion, And a bracket 320 coupled to the frame of the display panel 100 to allow the module jig 310 to be positioned above the display panel 100 by being coupled to the module jig 310.

The module jig 310 has a "C" -shaped opening surface so that the position sensing module 300 can emit or receive a laser beam, and is bolted to the position sensing module 300 to be coupled thereto.

The lower portion of the bracket 320 is fixedly coupled to a frame (not shown) that protects the display panel 100 by bolts, and a module jig 310, do.

5 is a perspective view illustrating a module jig to which a position sensing module for a touch screen using laser reflection according to the present invention is attached.

5, the module jig 310 of the touch screen using laser reflection according to the present invention includes a position sensing module 300 for emitting or receiving a laser through a "C" A plurality of coupling holes 311 are formed on the front surface of the module jig 310 and a rotary fan 330 having a prism (not shown) is mounted on the module jig 310, So that the laser beam emitted from the light guide plate 200 is radiated in a clockwise direction or a counterclockwise direction so as to be parallel to the front surface of the contact portion 200.

The module jig 310 may be made of any one of aluminum, carbon steel, and stainless steel. The module jig 310 may have a U- 311 are formed.

A light emitting device and a light receiving device are installed inside the module jig 310 so that the position sensing module 300 mounted on the rear surface can emit and receive a laser toward the opened surface of the module jig 310, The emitted laser is attached to the rotary fan 330, and the laser is radiated in parallel to the front surface of the contact portion 200 by a rotating prism.

The rotation direction of the rotary fan 330 can be adjusted according to the area in which the light emitting device of each control unit (not shown) should emit light. When the laser light emission device is out of the designated area, the prism of the rotary fan 330 It is also possible to control the light emitting device to emit laser light when it comes to the designated zone.

6 is a perspective view illustrating a bracket to which a module jig and a display panel of a touch screen using laser reflection according to the present invention are coupled.

6, the bracket 320 of the touch screen using the laser reflection according to the present invention is formed into a letter "A" to widen the contact area with the frame (not shown) of the display panel 100 of FIG. 5 And the protrusion 323 and the coupling plate 322 are formed at one end of the module jig 310 so that the module jig 310 of FIG. 5 can be mounted and fixed.

The bracket 320 is formed in a shape of "A" so as to be coupled to the rear and top portions of the frame of the display panel 100 of FIG. 5 in order to widen the contact area so as to generate less vibration. So as to be integrated with the display panel 100 of Fig.

A protrusion 323 is formed on one side of the module jig 310 to which the position sensing module 300 of FIG. 5 is attached. The protrusion 323 is formed on the protrusion 323 by bolts, (322) are formed.

The bracket 320 is connected to the power supply of the position sensing module 300 and the control unit (not shown) coupled to the module jig 310 of FIG. 5 to transmit an input signal to the display panel 100 And further includes a groove 321 formed with a space for connecting a cable (not shown) to the display panel 100 of FIG.

7 is a perspective view illustrating a reflection device inserted into a cover of a touch screen using laser reflection according to the present invention.

As shown in FIG. 7, the material of the reflection device 400 of the touch screen using laser reflection according to the present invention is processed to form a tilt using acryl, and a reflection film Is attached.

The reflector 400 is not directly coupled to the contact portion 200 of FIG. 1 but includes a cover 410 of a "C" shape having one side opened so that the reflector 400 can be inserted thereinto, After which the reflective device 400 is inserted into the cover 410. [

The reflective device 400 is processed to form various tilt using acrylic which is easy to process, and a reflection film is attached to the inclined surface so that the laser can be easily reflected.

The cover 410 is open at one side in a "C" shape, and a sloped portion of the reflection device 400 is inserted into the opened portion to reflect the laser through the reflection film.

When the reflecting device 400 is directly coupled to the front edge of the contact part 200 of FIG. 1, there arises a problem that can not be corrected if an abnormal reflection occurs due to a reflection angle of the laser, (410).

Accordingly, the cover 410 is attached to the front edge of the contact part 200 of FIG. 1 so that the reflection device 400 can be easily pulled out or inserted. When the laser is not normally reflected, It can be corrected by adjusting the tilt.

8 is a perspective view illustrating a case in which a case is mounted on a touch screen using laser reflection according to the present invention.

As shown in FIG. 8, the touch screen using laser reflection according to the present invention is configured such that a case 500 is mounted on the outside, and the contact unit 200 is formed in an opened state, So that it can be input.

As described above, according to the touch screen using laser reflection according to the present invention, it is possible to reduce the volume of the touch screen and simplify the repair by forming the laser light emitting portion and the light receiving portion at the same position, It is possible to quickly recognize the position of contact with the touch screen and reduce the vibration generated when the touch screen is contacted, thereby preventing the laser emitting device from malfunctioning.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is clearly understood that the same is by way of illustration and example only and is not to be taken as a limitation of the scope of the present invention. Or modify it. The scope of the invention should, therefore, be construed in light of the claims set forth to cover many of such variations.

100: display panel 200:
210: cushioning material 300: position sensing module
310: module jig 311:
320: Bracket 321: Home
322: engaging plate 323: projection
330: Rotating fan 400: Reflecting device
410: Cover 500: Case

Claims (6)

A display panel formed to output a screen;
A contact portion formed on a front surface of the display and attached with a glass so that a user can touch the screen;
A position sensing module positioned at the center of the display and formed of a laser emitting device and a light receiving device and sensing a position of contact with the contact portion;
A reflective device positioned at both sides and a lower edge of the contact portion and tilted so as to reflect a laser beam emitted from the position sensing module;
And a controller configured to recognize a position of the contact portion contacting the contact portion through the position sensing module and recognize the position of the contact portion.
Touch screen with laser reflection.
The method according to claim 1,
The position sensing module includes a module jig formed in a "C" shape so as to emit and receive a laser toward the opened portion
And a bracket coupled to the frame of the display panel so that the module jig can be positioned at an upper portion of the display panel in combination with the module jig
Touch screen with laser reflection.
The method according to claim 1,
Wherein the contact portion is prevented from malfunctioning by reducing vibration generated when the contact portion is contacted to the contact portion by using a cushioning material at the edge when the contact portion is attached to the display panel
Touch screen with laser reflection.
The method according to claim 1,
The reflective device is fabricated to have a tilt using acrylic, and a reflecting film is attached to the inclined surface so that the laser can be reflected.
Touch screen with laser reflection.
The method according to claim 1,
The position sensing module may be formed of one or more laser emitting devices. When the number of the light emitting devices is two or more, the position detecting module divides a region of each light emitting device to emit laser light, So as to recognize
Touch screen with laser reflection.
The method according to claim 1,
Wherein the reflection device located on both sides of the contact portion has a decreasing slope as it goes down from the top to the bottom and a reflection device located on the bottom surface is formed to be symmetrical with respect to the center,
Touch screen with laser reflection.
KR1020150093561A 2015-06-30 2015-06-30 Touch screen using laser reflection KR20170003196A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1020150093561A KR20170003196A (en) 2015-06-30 2015-06-30 Touch screen using laser reflection

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1020150093561A KR20170003196A (en) 2015-06-30 2015-06-30 Touch screen using laser reflection

Publications (1)

Publication Number Publication Date
KR20170003196A true KR20170003196A (en) 2017-01-09

Family

ID=57811267

Family Applications (1)

Application Number Title Priority Date Filing Date
KR1020150093561A KR20170003196A (en) 2015-06-30 2015-06-30 Touch screen using laser reflection

Country Status (1)

Country Link
KR (1) KR20170003196A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114093802A (en) * 2022-01-19 2022-02-25 武汉华工激光工程有限责任公司 Automatic laser repair equipment and method for mini LED flip chip

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20150024705A (en) 2013-08-27 2015-03-09 주식회사 에이에프오 Infrared Touch Screen Devices Including Circuit for Canceling Offset

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20150024705A (en) 2013-08-27 2015-03-09 주식회사 에이에프오 Infrared Touch Screen Devices Including Circuit for Canceling Offset

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114093802A (en) * 2022-01-19 2022-02-25 武汉华工激光工程有限责任公司 Automatic laser repair equipment and method for mini LED flip chip

Similar Documents

Publication Publication Date Title
US10895936B2 (en) Display apparatus
US8130202B2 (en) Infrared touch screen gated by touch force
US8339373B2 (en) Touch panel display with infrared light source
US8466901B2 (en) Optical touch system having integrated optical touch apparatus and panel apparatus and operating method thereof
US8803809B2 (en) Optical touch device and keyboard thereof
US20080259050A1 (en) Optical touch control apparatus and method thereof
TWI522722B (en) Light source device and adjusting method thereof
KR20040042149A (en) Touch panel aparatus and method for controling the same
US20110308159A1 (en) Apparatus for detecting coordinates, and display device, security device, and electronic blackboard including the same
KR20090092878A (en) Infrared ray touch screen
US20170170826A1 (en) Optical sensor based mechanical keyboard input system and method
KR20120008665A (en) Optical touch screen
US9720499B2 (en) Display apparatus
WO2010072028A1 (en) Touch surface and system and method of detecting touch input
US10684651B2 (en) Electronic device
JP2015014982A (en) Coordinate detector and electronic information board system
KR20170003196A (en) Touch screen using laser reflection
KR20100066671A (en) Touch display apparatus
CN108351666B (en) Operating device
US8976157B2 (en) Camera module and optical touch screen using the same
US20130162597A1 (en) Optical touch control module
US9081444B2 (en) Touch display apparatus and method of determining touch position using the same
US20120092301A1 (en) Touch screen system and manufacturing method thereof
EP3326052A1 (en) Apparatus and method for detecting gestures on a touchpad
KR102111782B1 (en) Coordinates ditecting apparatus having electromagnetic resonance touch sensor and ir touch sensor

Legal Events

Date Code Title Description
A201 Request for examination
E902 Notification of reason for refusal
E701 Decision to grant or registration of patent right