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WO2013160184A1 - Touch screen for display devices - Google Patents

Touch screen for display devices Download PDF

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Publication number
WO2013160184A1
WO2013160184A1 PCT/EP2013/058073 EP2013058073W WO2013160184A1 WO 2013160184 A1 WO2013160184 A1 WO 2013160184A1 EP 2013058073 W EP2013058073 W EP 2013058073W WO 2013160184 A1 WO2013160184 A1 WO 2013160184A1
Authority
WO
WIPO (PCT)
Prior art keywords
touch screen
front panel
casing
profile
produced
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/EP2013/058073
Other languages
French (fr)
Inventor
Cemal Guler
Erdal BEKCI
Gokhan Mert
Dogan Demirhan
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.)
Arcelik AS
Original Assignee
Arcelik AS
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 Arcelik AS filed Critical Arcelik AS
Publication of WO2013160184A1 publication Critical patent/WO2013160184A1/en
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

Definitions

  • the present invention relates to an optical touch screen that is suitable for utilization in display devices such as television and computer.
  • Screens of display devices such as television and computer are produced to be touch-operated in some embodiments, thus, using components such as keyboard and mouse is not required.
  • Touch screens are produced in various types such as capacitive, resistive or electromagnetic and optical touch screens are preferred particularly in the educational field due to ease of use and low costs.
  • optical touch screens a glass panel is placed in front of the LCD or plasma panel and cameras are placed at the edges or corners of the glass panel. The cameras have linear light emitters generally of infrared type and light receivers. The camera detects the coordinates of the areas the user touches on the glass panel with his/her finger or by using a special pen.
  • optical touch screens furthermore, reflectors are used that provide the beams emitted from the light emitter of the camera and reflected from the touched points to be kept within the boundaries of the screen.
  • reflectors In order to place the reflectors onto the touch screen, an adhesion surface surrounding the touch screen is required.
  • the components whereon the reflectors are placed increase the weight and the cost of the touch screen.
  • the aim of the present invention is the realization of a touch screen that is suitable for utilization in electronic devices such as television and computer, and the weight and cost of which are reduced.
  • the touch screen realized in order to attain the aim of the present invention, explicated in the first claim and the respective claims thereof, is suitable for utilization in display devices such as television and computer and comprises an LCD or plasma type rear panel, a front panel which provides the user to input data by touching and which is produced from a transparent material such as glass or transparent plastic, preferably from glass, a casing surrounding the rear panel and the front panel, one or more than one camera placed onto the front panel and reflectors which keep the beams emitted from the camera and reflected within the boundaries of the front panel.
  • the touch screen furthermore, comprises a profile produced from hollow plastic material, which extends along at least one edge of the casing, which at least partially surrounds the front panel surface facing the user, and to the inner surface, that is perpendicular to the front panel, of which the reflector is placed.
  • the profile is produced by the extrusion method and fixed on the inner part of the casing by adhesion.
  • the profile and the casing are joined by a plastic welding method, for example the friction welding method.
  • the profile and the casing are produced as a single piece in a plastic injection mould or the profile and the casing are joined by the over-injection method.
  • the profile is placed between the casing and the front panel and supports the front panel by bearing against the inner surface of the front panel facing the user.
  • camera holding extensions preferably produced as single pieces with the profiles, are situated at the corner regions of the casing, on the edges of the profiles which extend towards each other.
  • the cameras and the reflectors are mounted onto the front panel using light and easily produced hollow plastic profiles, thus the weight and the production cost of the touch screen are decreased.
  • Figure 1 - is the exploded view of a touch screen.
  • Figure 2 - is the rear view of a casing.
  • Figure 3 - is the top view of a rear panel, a front panel and a casing.
  • Figure 4 - is the view of detail D2 in Figure 3.
  • Figure 5 - is the view of detail D1 in Figure 2.
  • the optical touch screen (1) suitable for utilization in display devices such as television and computer comprises an LCD or plasma type rear panel (2), a front panel (3) which is placed in front of the rear panel (2) and enables the user to input data by touching with his/her hand or by means of a special pen (stylus etc.) and which is produced from a transparent material, for example glass, a casing (4) which surrounds the rear panel (2) and the front panel (3), which is joined with the rear lid (not shown in the figures) and which is produced preferably from plastic material, one or more than one camera (7) which is placed so as to face the front panel (3) surface facing the user, which provides the detection of the coordinates of the points touched on the front panel (3) and which has an infrared light emitter (5) that emits light in the direction of the front panel (3) plane and a light receiver (6), and one or more than one reflector (8) which is placed on the front panel (3), preferably at the edges thereof and which provides the beams emitted from the camera (7) and reflected to be kept within the boundaries of the
  • the touch screen (1) of the present invention comprises one or more than one profile (9) which is produced from hollow plastic material, integrated with the casing (4), which extends along at least one inner edge of the casing (4) and at least partially surrounds the front panel (3) surface (S) facing the user, and to the inner surface (Y), that is perpendicular to the front panel (3), of which the reflector (8) is placed (Figure 1, Figure 4, Figure 5).
  • the profile (9) is produced by the extrusion method.
  • the profile (9) is fixed to the casing (4) by adhesion.
  • the profile (9) is fixed to the casing (4) by the friction welding method.
  • the profile (9) and the casing (4) are produced as a single piece by the plastic injection method.
  • the profile (9) is produced by being injected over the casing (4).
  • the profile (9) is produced from hollow plastic material and fixed to the inner edge of the casing (4).
  • the reflectors (8) are fixed to the inner surfaces (Y) of the profile (9) that are perpendicular to the front panel (3).
  • the profile (9) serves as a support for the reflectors (8). In order to support the reflectors (8), expensive and heavy materials are not required to be used in the casing (4) and a light construction with a low cost is obtained.
  • the profile (9) is placed between the casing (4) and the front panel (3) and supports the front panel (3) ( Figure 4).
  • the reflector (8) is shaped as a tape and is fixed to the profile (9) surface (Y) facing the front panel (3) by being adhered thereto.
  • the touch screen (1) comprises one or more than one camera holding extension (10) which is located at the corner regions of the casing (4) and the end portions of the profiles (9) and which is produced as a single piece with the profiles (9) or mounted thereto afterwards ( Figure 5).
  • the reflectors (8) are mounted onto the front panel (3) by using the hollow plastic profiles (9) which are light and low cost. Additional parts are not required to be used in order to mount the cameras (7) onto the front panel (3), the profiles (9) are also used in order to mount the cameras (7) by means of the camera holding extensions (10) on the edges of the profiles (9) facing each other.
  • the weight and the cost of the touch screen (1) are decreased and savings in time and labor are provided.

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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)
  • Devices For Indicating Variable Information By Combining Individual Elements (AREA)

Description

TOUCH SCREEN FOR DISPLAY DEVICES
The present invention relates to an optical touch screen that is suitable for utilization in display devices such as television and computer.
Screens of display devices such as television and computer are produced to be touch-operated in some embodiments, thus, using components such as keyboard and mouse is not required. Touch screens are produced in various types such as capacitive, resistive or electromagnetic and optical touch screens are preferred particularly in the educational field due to ease of use and low costs. In optical touch screens, a glass panel is placed in front of the LCD or plasma panel and cameras are placed at the edges or corners of the glass panel. The cameras have linear light emitters generally of infrared type and light receivers. The camera detects the coordinates of the areas the user touches on the glass panel with his/her finger or by using a special pen. In optical touch screens, furthermore, reflectors are used that provide the beams emitted from the light emitter of the camera and reflected from the touched points to be kept within the boundaries of the screen. In order to place the reflectors onto the touch screen, an adhesion surface surrounding the touch screen is required. In the state of the art, the components whereon the reflectors are placed increase the weight and the cost of the touch screen.
In the state of the art International Patent Application No. WO2012011686, a camera module and an optical touch screen are explained. The cameras and the reflectors located on the optical touch screen are placed to a frame mounted to the case top.
The aim of the present invention is the realization of a touch screen that is suitable for utilization in electronic devices such as television and computer, and the weight and cost of which are reduced.
The touch screen realized in order to attain the aim of the present invention, explicated in the first claim and the respective claims thereof, is suitable for utilization in display devices such as television and computer and comprises an LCD or plasma type rear panel, a front panel which provides the user to input data by touching and which is produced from a transparent material such as glass or transparent plastic, preferably from glass, a casing surrounding the rear panel and the front panel, one or more than one camera placed onto the front panel and reflectors which keep the beams emitted from the camera and reflected within the boundaries of the front panel. The touch screen, furthermore, comprises a profile produced from hollow plastic material, which extends along at least one edge of the casing, which at least partially surrounds the front panel surface facing the user, and to the inner surface, that is perpendicular to the front panel, of which the reflector is placed.
In an embodiment of the present invention, the profile is produced by the extrusion method and fixed on the inner part of the casing by adhesion.
In another embodiment of the present invention, the profile and the casing are joined by a plastic welding method, for example the friction welding method.
In another embodiment of the present invention, the profile and the casing are produced as a single piece in a plastic injection mould or the profile and the casing are joined by the over-injection method.
In another embodiment of the present invention, the profile is placed between the casing and the front panel and supports the front panel by bearing against the inner surface of the front panel facing the user.
In another embodiment of the present invention, camera holding extensions, preferably produced as single pieces with the profiles, are situated at the corner regions of the casing, on the edges of the profiles which extend towards each other.
In the touch screen of the present invention, the cameras and the reflectors are mounted onto the front panel using light and easily produced hollow plastic profiles, thus the weight and the production cost of the touch screen are decreased.
The touch screen realized in order to attain the aim of the present invention is illustrated in the attached figures, where:
Figure 1 - is the exploded view of a touch screen.
Figure 2 - is the rear view of a casing.
Figure 3 - is the top view of a rear panel, a front panel and a casing.
Figure 4 - is the view of detail D2 in Figure 3.
Figure 5 - is the view of detail D1 in Figure 2.
The elements illustrated in the figures are numbered as follows:
  1. Touch screen
  2. Rear panel
  3. Front panel
  4. Casing
  5. Light emitter
  6. Light receiver
  7. Camera
  8. Reflector
  9. Profile
  10. Camera holding extension
The optical touch screen (1) suitable for utilization in display devices such as television and computer comprises an LCD or plasma type rear panel (2), a front panel (3) which is placed in front of the rear panel (2) and enables the user to input data by touching with his/her hand or by means of a special pen (stylus etc.) and which is produced from a transparent material, for example glass, a casing (4) which surrounds the rear panel (2) and the front panel (3), which is joined with the rear lid (not shown in the figures) and which is produced preferably from plastic material, one or more than one camera (7) which is placed so as to face the front panel (3) surface facing the user, which provides the detection of the coordinates of the points touched on the front panel (3) and which has an infrared light emitter (5) that emits light in the direction of the front panel (3) plane and a light receiver (6), and one or more than one reflector (8) which is placed on the front panel (3), preferably at the edges thereof and which provides the beams emitted from the camera (7) and reflected to be kept within the boundaries of the front panel (3).
The touch screen (1) of the present invention comprises one or more than one profile (9) which is produced from hollow plastic material, integrated with the casing (4), which extends along at least one inner edge of the casing (4) and at least partially surrounds the front panel (3) surface (S) facing the user, and to the inner surface (Y), that is perpendicular to the front panel (3), of which the reflector (8) is placed (Figure 1, Figure 4, Figure 5).
In an embodiment of the present invention, the profile (9) is produced by the extrusion method.
In another embodiment of the present invention, the profile (9) is fixed to the casing (4) by adhesion.
In another embodiment of the present invention, the profile (9) is fixed to the casing (4) by the friction welding method.
In another embodiment of the present invention, the profile (9) and the casing (4) are produced as a single piece by the plastic injection method.
In another embodiment of the present invention, the profile (9) is produced by being injected over the casing (4).
The profile (9) is produced from hollow plastic material and fixed to the inner edge of the casing (4). The reflectors (8) are fixed to the inner surfaces (Y) of the profile (9) that are perpendicular to the front panel (3). The profile (9) serves as a support for the reflectors (8). In order to support the reflectors (8), expensive and heavy materials are not required to be used in the casing (4) and a light construction with a low cost is obtained.
In an embodiment of the present invention, the profile (9) is placed between the casing (4) and the front panel (3) and supports the front panel (3) (Figure 4).
In another embodiment of the present invention, the reflector (8) is shaped as a tape and is fixed to the profile (9) surface (Y) facing the front panel (3) by being adhered thereto.
In another embodiment of the present invention, the touch screen (1) comprises one or more than one camera holding extension (10) which is located at the corner regions of the casing (4) and the end portions of the profiles (9) and which is produced as a single piece with the profiles (9) or mounted thereto afterwards (Figure 5).
In the touch screen (1) of the present invention, the reflectors (8) are mounted onto the front panel (3) by using the hollow plastic profiles (9) which are light and low cost. Additional parts are not required to be used in order to mount the cameras (7) onto the front panel (3), the profiles (9) are also used in order to mount the cameras (7) by means of the camera holding extensions (10) on the edges of the profiles (9) facing each other. The weight and the cost of the touch screen (1) are decreased and savings in time and labor are provided.
It is to be understood that the present invention is not limited by the embodiments disclosed above and a person skilled in the art can easily introduce different embodiments. These should be considered within the scope of the protection disclosed by the claims of the present invention.

Claims (8)

  1. A touch screen (1) suitable for utilization in display devices such as television and computer, comprising an LCD or plasma type rear panel (2), a front panel (3) which is placed in front of the rear panel (2) and enables the user to input data by touching and which is produced from glass or transparent plastic, a casing (4) which surrounds the rear panel (2) and the front panel (3), one or more than one camera (7) which is placed so as to face the front panel (3) surface (S) facing the user and which has a light emitter (5) and a light receiver (6), and one or more than one reflector (8) which is placed at the edges of the front panel (3), characterized in that one or more than one profile (9) which is produced from hollow plastic material, which extends along at least one edge of the casing (4) and at least partially surrounds the front panel (3) surface (S) facing the user, and to the inner surface (Y), that is perpendicular to the front panel (3), of which the reflector (8) is placed.
  2. A touch screen (1) as in Claim 1, characterized in that the profile (9) produced by the extrusion method.
  3. A touch screen (1) as in Claim 1 or 2, characterized in that the profile (9) fixed to the casing (4) by adhesion.
  4. A touch screen (1) as in Claim 1 or 2, characterized in that the profile (9) fixed to the casing (4) by the friction welding method.
  5. A touch screen (1) as in Claim 1, characterized in that the profile (9) produced as a single piece with the casing (4).
  6. A touch screen (1) as in Claim 1, characterized in that the profile (9) produced by being injected over the casing (4).
  7. A touch screen (1) as in any one of the above Claims, characterized in that the profile (9) which is placed between the casing (4) and the front panel (3) and which bears against the surface (S) of the front panel (3) facing the user.
  8. A touch screen (1) as in any one of the above Claims, characterized in that one or more than one camera holding extension (10) located at the end portions of the profiles (9).
PCT/EP2013/058073 2012-04-24 2013-04-18 Touch screen for display devices Ceased WO2013160184A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
TR201204774 2012-04-24
TRA2012/04774 2012-04-24

Publications (1)

Publication Number Publication Date
WO2013160184A1 true WO2013160184A1 (en) 2013-10-31

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PCT/EP2013/058073 Ceased WO2013160184A1 (en) 2012-04-24 2013-04-18 Touch screen for display devices

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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20080231791A1 (en) * 2004-08-24 2008-09-25 Touch Panel Systems K.K. Touch Panel
US20090213094A1 (en) * 2008-01-07 2009-08-27 Next Holdings Limited Optical Position Sensing System and Optical Position Sensor Assembly
US20100238128A1 (en) * 2009-03-23 2010-09-23 Au Optronics Corporation Touch display device
US20110007033A1 (en) * 2009-07-07 2011-01-13 Ikchang Choi Liquid crystal display
WO2012011686A2 (en) 2010-07-19 2012-01-26 Lg Innotek Co., Ltd. Camera module and optical touch screen using the same

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20080231791A1 (en) * 2004-08-24 2008-09-25 Touch Panel Systems K.K. Touch Panel
US20090213094A1 (en) * 2008-01-07 2009-08-27 Next Holdings Limited Optical Position Sensing System and Optical Position Sensor Assembly
US20100238128A1 (en) * 2009-03-23 2010-09-23 Au Optronics Corporation Touch display device
US20110007033A1 (en) * 2009-07-07 2011-01-13 Ikchang Choi Liquid crystal display
WO2012011686A2 (en) 2010-07-19 2012-01-26 Lg Innotek Co., Ltd. Camera module and optical touch screen using the same

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