WO2013160181A1 - Touch screen for display devices - Google Patents

Touch screen for display devices Download PDF

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Publication number
WO2013160181A1
WO2013160181A1 PCT/EP2013/058067 EP2013058067W WO2013160181A1 WO 2013160181 A1 WO2013160181 A1 WO 2013160181A1 EP 2013058067 W EP2013058067 W EP 2013058067W WO 2013160181 A1 WO2013160181 A1 WO 2013160181A1
Authority
WO
WIPO (PCT)
Prior art keywords
front panel
frame
touch screen
panel
produced
Prior art date
Application number
PCT/EP2013/058067
Other languages
French (fr)
Inventor
Cemal Guler
Erdal BEKCI
Gokhan Mert
Dogan Demirhan
Original Assignee
Arcelik Anonim Sirketi
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 Anonim Sirketi filed Critical Arcelik Anonim Sirketi
Publication of WO2013160181A1 publication Critical patent/WO2013160181A1/en

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    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
    • G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
    • G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
    • G06F3/042—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by opto-electronic means
    • G06F3/0428—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by opto-electronic means by sensing at the edges of the touch surface the interruption of optical paths, e.g. an illumination plane, parallel to the touch surface which may be virtual

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.
  • a touch screen (1’) that comprises an LCD rear panel (2’), a front panel (3’) produced from glass, a frame (4’), cameras (7’) and reflectors (8’), an inner frame (F) whereon the reflector is fixed is placed to the inner side of the frame (4’).
  • the cameras (7’) are also mounted onto the inner frame (F).
  • the said inner frame (F) increases the weight and cost of the touch screen (1').
  • the aim of the present invention is the realization of a touch screen, 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 frame 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 ribs which are produced as a single piece with the frame, which are adjacent to at least one inner edge of the frame and extend along the adjacent inner edge of the frame, and which surround the front panel surface facing the user at least partially, for example, from the right, left and lower sides, and onto the surface, that is at the front panel side and perpendicular to the plane of the front panel, of which the reflectors are placed.
  • the frame and the ribs are produced from plastic material, preferably by the plastic injection method.
  • the ribs bear against the frame and the front panel in perpendicular direction by extending from the frame towards the front panel and serve as a supporting means for the front panel.
  • the reflector is shaped as a tape and is fixed by being adhered to the rib surface at the front panel side.
  • the touch screen comprises plastic camera holders at the corner regions of the frame, which are produced as a single piece with the frame.
  • the touch screen of the present invention additional components are not required to be used in order to mount the cameras and reflectors onto the front panel, the cameras are connected to the camera holders produced as a single piece with the frame and the reflectors are adhered to the inner surface of the ribs also produced as a single piece with the frame.
  • the weight and cost of the touch screen are reduced, the production is simplified and the production time is shortened.
  • Figure 1 - is the exploded view of a state of the art touch screen.
  • Figure 2 - is the exploded view of a touch screen in the embodiment of the present invention.
  • Figure 3 - is the rear view of a frame.
  • Figure 4 - is the top view of a rear panel, a front panel and a frame.
  • Figure 5 - is the view of detail D2 in Figure 4.
  • Figure 6 - is the view of detail D1 in Figure 3.
  • Figure 7 - is the partial exploded view of the frame, the rib, the camera and the reflector.
  • Figure 8 - is the view of detail D3 in Figure 7.
  • 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 glass or transparent plastic, a frame (4) which surrounds the rear panel (2) and the front panel (3) and which is joined with the rear lid (not shown in the figures), 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 at the edges of the front panel (3) and 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 rib (9) which is produced as a single piece with the frame (4), which extends from the frame (4) towards the front panel (3) along at least one edge of the frame (4) and at least partially surrounds the front panel (3) surface (S) facing the user, and onto the inner surface (Y), that is perpendicular to the front panel (3), of which the reflector (8) is placed (Figure 2, Figure 5, Figure 7, Figure 8).
  • the frame (4) and the rib (9) are produced from plastic material with the plastic injection mould and after the frame (4) and the integrated ribs (9) are removed from the mould, the reflectors (8) are fixed onto the rib (9) surfaces (Y) facing the front panel (3).
  • the ribs (9) serve as holders for the reflectors (8). Additional structures mounted into the frame (4) afterwards are not required to be used for carrying the reflectors (8), thus number of components is reduced and time and labor savings are provided.
  • the rib (9) extends from the frame (4) towards the front panel (3) in the direction perpendicular to the plane of the frame (4) and the front panel (3) and supports the front panel (3) by bearing against the front panel (3) surface (S) facing the user ( Figure 5).
  • the reflector (8) is shaped as a tape and is fixed to the rib (9) surface (Y) perpendicular to the front panel (3) by being adhered thereto ( Figure 8).
  • the touch screen (1) comprises one or more than one camera holder (10) which is located at the corner regions of the frame (4) and produced as a single piece with the frame (4) ( Figure 6, Figure 8).
  • touch screen (1) of the present invention additional components are not required to be used in order to mount the cameras (7) and the reflectors (8) onto the front panel (3), the weight and cost of the touch screen (1) are reduced and time and labor savings are provided in the production.

Abstract

The present invention relates to 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 provides the user to input data by touching and which is produced from glass or transparent plastic, a frame (4) which surrounds the rear panel (2) and the front panel (3), one or more than one camera (7) which is placed at corner regions of the front panel (3) and which has an infrared light emitter (5) and a light receiver (6), and one or more than one reflector (8) which is placed at edge regions of the front panel (3).

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, in a touch screen (1’) that comprises an LCD rear panel (2’), a front panel (3’) produced from glass, a frame (4’), cameras (7’) and reflectors (8’), an inner frame (F) whereon the reflector is fixed is placed to the inner side of the frame (4’). The cameras (7’) are also mounted onto the inner frame (F). The said inner frame (F) increases the weight and cost of the touch screen (1').
In the state of the art International Patent Application No. WO2012011686, a camera module and an optical touch screen are explained. The cameras and reflectors located on the optical touch screen are placed into a frame mounted to the case top.
The aim of the present invention is the realization of a touch screen, 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 frame 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 ribs which are produced as a single piece with the frame, which are adjacent to at least one inner edge of the frame and extend along the adjacent inner edge of the frame, and which surround the front panel surface facing the user at least partially, for example, from the right, left and lower sides, and onto the surface, that is at the front panel side and perpendicular to the plane of the front panel, of which the reflectors are placed.
In an embodiment of the present invention, the frame and the ribs are produced from plastic material, preferably by the plastic injection method.
In an embodiment of the present invention, the ribs bear against the frame and the front panel in perpendicular direction by extending from the frame towards the front panel and serve as a supporting means for the front panel.
In another embodiment of the present invention, the reflector is shaped as a tape and is fixed by being adhered to the rib surface at the front panel side.
In another embodiment of the present invention, the touch screen comprises plastic camera holders at the corner regions of the frame, which are produced as a single piece with the frame.
In the touch screen of the present invention, additional components are not required to be used in order to mount the cameras and reflectors onto the front panel, the cameras are connected to the camera holders produced as a single piece with the frame and the reflectors are adhered to the inner surface of the ribs also produced as a single piece with the frame. The weight and cost of the touch screen are reduced, the production is simplified and the production time is shortened.
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 state of the art touch screen.
Figure 2 - is the exploded view of a touch screen in the embodiment of the present invention.
Figure 3 - is the rear view of a frame.
Figure 4 - is the top view of a rear panel, a front panel and a frame.
Figure 5 - is the view of detail D2 in Figure 4.
Figure 6 - is the view of detail D1 in Figure 3.
Figure 7 - is the partial exploded view of the frame, the rib, the camera and the reflector.
Figure 8 - is the view of detail D3 in Figure 7.
The elements illustrated in the figures are numbered as follows:
  1. Touch screen
  2. Rear panel
  3. Front panel
  4. Frame
  5. Light emitter
  6. Light receiver
  7. Camera
  8. Reflector
  9. Rib
  10. Camera holder
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 glass or transparent plastic, a frame (4) which surrounds the rear panel (2) and the front panel (3) and which is joined with the rear lid (not shown in the figures), 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 at the edges of the front panel (3) and 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 rib (9) which is produced as a single piece with the frame (4), which extends from the frame (4) towards the front panel (3) along at least one edge of the frame (4) and at least partially surrounds the front panel (3) surface (S) facing the user, and onto the inner surface (Y), that is perpendicular to the front panel (3), of which the reflector (8) is placed (Figure 2, Figure 5, Figure 7, Figure 8).
In the production of the touch screen (1), the frame (4) and the rib (9) are produced from plastic material with the plastic injection mould and after the frame (4) and the integrated ribs (9) are removed from the mould, the reflectors (8) are fixed onto the rib (9) surfaces (Y) facing the front panel (3). The ribs (9) serve as holders for the reflectors (8). Additional structures mounted into the frame (4) afterwards are not required to be used for carrying the reflectors (8), thus number of components is reduced and time and labor savings are provided.
In an embodiment of the present invention, the rib (9) extends from the frame (4) towards the front panel (3) in the direction perpendicular to the plane of the frame (4) and the front panel (3) and supports the front panel (3) by bearing against the front panel (3) surface (S) facing the user (Figure 5).
In another embodiment of the present invention, the reflector (8) is shaped as a tape and is fixed to the rib (9) surface (Y) perpendicular to the front panel (3) by being adhered thereto (Figure 8).
In yet another embodiment of the present invention, the touch screen (1) comprises one or more than one camera holder (10) which is located at the corner regions of the frame (4) and produced as a single piece with the frame (4) (Figure 6, Figure 8).
In the touch screen (1) of the present invention, additional components are not required to be used in order to mount the cameras (7) and the reflectors (8) onto the front panel (3), the weight and cost of the touch screen (1) are reduced and time and labor savings are provided in the production.
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 (5)

  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 frame (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 an infrared 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 rib (9) which is produced as a single piece with the frame (4), which extends from the frame (4) towards the front panel (3) along at least one edge of the frame (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 frame (4) and the rib (9) that are produced from plastic material.
  3. A touch screen (1) as in Claim 1 or 2, characterized in that the rib (9) which extends from the frame (4) towards the front panel (3) in the direction perpendicular to the plane of the frame (4) and the front panel (3) and which bears against the front panel (3).
  4. A touch screen (1) as in any one of the above claims, characterized in that the reflector (8) which is shaped as a tape and fixed to the rib (9) surface (Y) perpendicular to the front panel (3) by being adhered thereto.
  5. A touch screen (1) as in any one of the above claims, characterized in that one or more than one camera holder (10) which is located at the corner regions of the frame (4) and produced as a single piece with the frame (4).
PCT/EP2013/058067 2012-04-24 2013-04-18 Touch screen for display devices WO2013160181A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
TR201204776 2012-04-24
TRA2012/04776 2012-04-24

Publications (1)

Publication Number Publication Date
WO2013160181A1 true WO2013160181A1 (en) 2013-10-31

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PCT/EP2013/058067 WO2013160181A1 (en) 2012-04-24 2013-04-18 Touch screen for display devices

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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20100315379A1 (en) * 2009-05-22 2010-12-16 Matthew Allard Display Devices With Integrated Optical Components For Use in Position Detection
WO2012011686A2 (en) 2010-07-19 2012-01-26 Lg Innotek Co., Ltd. Camera module and optical touch screen using the same
US20120092301A1 (en) * 2010-10-13 2012-04-19 Acts Co., Ltd. Touch screen system and manufacturing method thereof

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20100315379A1 (en) * 2009-05-22 2010-12-16 Matthew Allard Display Devices With Integrated Optical Components For Use in Position Detection
WO2012011686A2 (en) 2010-07-19 2012-01-26 Lg Innotek Co., Ltd. Camera module and optical touch screen using the same
US20120092301A1 (en) * 2010-10-13 2012-04-19 Acts Co., Ltd. Touch screen system and manufacturing method thereof

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