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Protection panel for ultrasonic touch screen and method of manufacturing the same

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Publication number
WO2008020699A1
WO2008020699A1 PCT/KR2007/003881 KR2007003881W WO2008020699A1 WO 2008020699 A1 WO2008020699 A1 WO 2008020699A1 KR 2007003881 W KR2007003881 W KR 2007003881W WO 2008020699 A1 WO2008020699 A1 WO 2008020699A1
Authority
WO
Grant status
Application
Patent type
Prior art keywords
ultrasonic
piezoelectric
surface
non
substrate
Prior art date
Application number
PCT/KR2007/003881
Other languages
French (fr)
Inventor
Chan Hoi Kim
Original Assignee
Chan Hoi Kim
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

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Classifications

    • GPHYSICS
    • G06COMPUTING; CALCULATING; COUNTING
    • G06FELECTRICAL DIGITAL DATA PROCESSING
    • G06F3/00Input 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
    • G06F3/01Input arrangements or combined input and output arrangements for interaction between user and computer
    • G06F3/03Arrangements for converting the position or the displacement of a member into a coded form
    • G06F3/041Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
    • G06F3/043Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means using propagating acoustic waves
    • G06F3/0436Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means using propagating acoustic waves in which generating transducers and detecting transducers are attached to a single acoustic waves transmission substrate

Abstract

Provided is an ultrasonic touch screen protection panel including: a transparent film flat sheet (10) that is formed in the same size as that of a non-piezoelectric substrate (11), has a space portion (10a) on the rear surface of the transparent film flat sheet (10), and are fixedly attached to both edges of the non-piezoelectric substrate (11); a transparent ultrasonic attenuation layer (20) which is attached to the space portion (10a) of the rear surface of the film flat sheet (10), has the same size as that of a detection area (17) of the non-piezoelectric substrate (11), and attenuates the surface acoustic waves (SAWs); and an ultrasonic transmission layer (30) including a number of protrusions (31) that transmits the surface acoustic waves (SAWs) on the rear surface of the ultrasonic attenuation layer (20). Accordingly, attenuation of the surface acoustic waves (SAWs) of the non-piezoelectric substrate (11) is attained by the ultrasonic attenuation layer (20) at a contact position between the finger or the article and the film flat sheet when the finger or the article contacts the film flat sheet (10) to thereby detect the contact position.

Description

Description

PROTECTION PANEL FOR ULTRASONIC TOUCH SCREEN AND METHOD OF MANUFACTURING THE SAME

Technical Field

[1] The present invention relates to a protection panel for an ultrasonic touch screen and a method of manufacturing the same, and more particularly, to a protection panel for an ultrasonic touch screen and a method of manufacturing the same, in which cutoff of a surface acoustic wave (SAW) is detected using an ultrasonic wave generated from comb-style electrodes of a piezoelectric device to thus protect surface of the ultrasonic touch screen that detects the contact position and prevent inferiority according to detection of the contact position. Background Art

[2] In general, a touch screen is a device which allows a user to contact character or picture information that appears on a screen by the user's hand or article without using a keyboard, to grasp what is the item that the user has chosen according to the contact position on the screen, and to handle a command corresponding to the user's chosen item.

[3] A resistance film method, an electrostatic capacity method, an electromagnetic induction method, and an ultrasonic method have been known as methods which are applied for a touch screen. Among them, an ultrasonic touch screen propagates surface acoustic waves (SAWs) onto a glass plate as a non-piezoelectric substrate to detect attenuation of surface acoustic waves (SAWs) which are produced by allowing a user to contact the glass plate by the user's finger or article, and to then detect the contact position of the user's finger or article, transparency is excellent than mode differing detect contact position by finger or object. The ultrasonic touch screen is superior to other touch screen manufacturing methods, in view of its transparency.

[4] FIG. 1 is a perspective view showing a general ultrasonic touch screen. FIGS. 2 and

3 are a plan view and a cross-sectional view of FIG. 1, respectively.

[5] As illustrated in FIGS. 1 to 3, the general ultrasonic touch screen includes: a non- piezoelectric substrate 1 made of a glass material; a plurality of input piezoelectric elements 3 which generate surface acoustic waves (SAWs) at one end of the X- direction and Y-direction of the non-piezoelectric substrate 1, respectively; and a plurality of reception piezoelectric elements 5 that receive the surface acoustic waves (SAWs) at the other end of the X-direction and Y-direction of the non-piezoelectric substrate 1, respectively, in opposition to the plurality of input piezoelectric elements 3. [6] In the case of the general ultrasonic touch screen, an electric signal is input to each of the input piezoelectric elements 3 to generate surface acoustic waves (SAWs) and to then propagate the surface acoustic waves (SAWs) onto the non-piezoelectric substrate 1. In this case, the reception piezoelectric elements 5 receive the propagated surface acoustic waves (SAWs). If a user contacts a propagation path of the surface acoustic waves (SAWs) on the non-piezoelectric substrate 1 by the user's finger or article, the surface acoustic waves (SAWs) are attenuated. Then, it is detected whether or not the reception signal levels of the reception piezoelectric elements 5 are attenuated, to thus detect whether or not there is a contact between the touch screen and the user's finger or article and the contact position. An area that is shown as a dashed line is a detection area 7 that can detect contact positions. Areas which are located at the peripheral portion where the input piezoelectric elements 3 and the reception piezoelectric elements 5 are installed are a frame area 9.

[7] In the case that a foreign substance that attenuates the surface acoustic waves

(SAWs), for example, oil, saliva, water or dust exists on the non-piezoelectric substrate 1 which is the detection area in the ultrasonic touch screen, a malfunction occurs at the time of detection of contact positions. In addition, the surface of the non-piezoelectric substrate 1 may be damaged by a continuous use of the touch screen. Disclosure of Invention

Technical Problem

[8] To solve the above problems, it is an object of the present invention to provide a protection panel for an ultrasonic touch screen and a method of manufacturing the same, in which the protection panel is installed on the upper portion of the ultrasonic touch screen to prevent foreign matters from stacking on a detection area on a non- piezoelectric substrate, to prevent a malfunction from occurring at the time of detection of contact positions, and prevent the surface of the non-piezoelectric substrate from being damaged. Technical Solution

[9] According to an aspect of the present invention, to accomplish the above object of the present invention, according to an aspect of the present invention, there is provided a protection panel for an ultrasonic touch screen comprising: a non-piezoelectric substrate; a plurality of input piezoelectric elements which generate surface acoustic waves (SAWs) at one end of the X-direction and Y-direction of the non-piezoelectric substrate, respectively; and a plurality of reception piezoelectric elements that receive the surface acoustic waves (SAWs) at the other end of the X-direction and Y-direction of the non-piezoelectric substrate, respectively, in opposition to the plurality of input piezoelectric elements, and which protects the ultrasonic touch screen having a detection area for detecting a contact position when a finger or an article contacts a propagation path of the surface acoustic waves (SAWs) on the non-piezoelectric substrate, wherein the ultrasonic touch screen protection panel comprises: a transparent film flat sheet that is formed in the same size as that of the non-piezoelectric substrate, has a space portion on the rear surface of the transparent film flat sheet, and are fixedly attached to both edges of the non-piezoelectric substrate; a transparent ultrasonic attenuation layer which is attached to the space portion of the rear surface of the film flat sheet, has the same size as that of the detection area of the non-piezoelectric substrate, and attenuates the surface acoustic waves (SAWs); and an ultrasonic transmission layer including a number of protrusions that transmits the surface acoustic waves (SAWs) on the rear surface of the ultrasonic attenuation layer, whereby attenuation of the surface acoustic waves (SAWs) of the non-piezoelectric substrate is attained by the ultrasonic attenuation layer at a contact position between the finger or the article and the film flat sheet when the finger or the article contacts the film flat sheet to thereby detect the contact position.

[10]

[11] Preferably but not necessarily, the ultrasonic transmission layer comprises the protrusions formed by a silk screen printing using ultraviolet photosetting ink on the rear surface of the ultrasonic attenuation layer.

[12] According to another aspect of the present invention, there is also provided a method of manufacturing an ultrasonic touch screen protection panel for protecting an ultrasonic touch screen comprising: a non-piezoelectric substrate; a plurality of input piezoelectric elements which generate surface acoustic waves (SAWs) at one end of the X-direction and Y-direction of the non-piezoelectric substrate, respectively; and a plurality of reception piezoelectric elements that receive the surface acoustic waves (SAWs) at the other end of the X-direction and Y-direction of the non-piezoelectric substrate, respectively, in opposition to the plurality of input piezoelectric elements, and which protects the ultrasonic touch screen having a detection area for detecting a contact position when a finger or an article contacts a propagation path of the surface acoustic waves (SAWs) on the non-piezoelectric substrate, the ultrasonic touch screen protection panel manufacturing method comprising: an ultrasonic attenuation layer formation step of forming a transparent ultrasonic attenuation layer which has the same size as that of the detection area of the non-piezoelectric substrate and attenuates the surface acoustic waves (SAWs), in a space portion of a transparent film flat sheet that is formed in the same size as that of the non-piezoelectric substrate and has the space portion on the rear surface of the transparent film flat sheet; an ultrasonic transmission layer formation step of forming an ultrasonic transmission layer including a number of protrusions that transmits the surface acoustic waves (SAWs) on the rear surface of the ultrasonic attenuation layer; and an adhesion step of fixedly attaching the film flat sheet to both edges of the non-piezoelectric substrate, whereby attenuation of the surface acoustic waves (SAWs) of the non-piezoelectric substrate is attained by the ultrasonic attenuation layer at a contact position between the finger or the article and the film flat sheet when the finger or the article contacts the film flat sheet, to thereby detect the contact position.

[13] According to still another aspect of the present invention, there is also provided a protection panel for an ultrasonic touch screen comprising: a non-piezoelectric substrate; a plurality of input piezoelectric elements which generate surface acoustic waves (SAWs) at one end of the X-direction and Y-direction of the non-piezoelectric substrate, respectively; and a plurality of reception piezoelectric elements that receive the surface acoustic waves (SAWs) at the other end of the X-direction and Y-direction of the non-piezoelectric substrate, respectively, in opposition to the plurality of input piezoelectric elements, and which protects the ultrasonic touch screen having a detection area for detecting a contact position when a finger or an article contacts a propagation path of the surface acoustic waves (SAWs) on the non-piezoelectric substrate, wherein the ultrasonic touch screen protection panel comprises: a transparent film flat sheet that is formed in the same size as that of the non-piezoelectric substrate, has a space portion on the rear surface of the transparent film flat sheet, and are fixedly attached to both edges of the non-piezoelectric substrate; a transparent ultrasonic attenuation layer which is attached to the space portion of the rear surface of the film flat sheet, has the same size as that of the detection area of the non-piezoelectric substrate, and attenuates the surface acoustic waves (SAWs); and an ultrasonic transmission layer including a number of protrusions that transmits the surface acoustic waves (SAWs) in the detection area on the front surface of the non-piezoelectric substrate, whereby attenuation of the surface acoustic waves (SAWs) of the non-piezoelectric substrate is attained by the ultrasonic attenuation layer at a contact position between the finger or the article and the film flat sheet when the finger or the article contacts the film flat sheet to thereby detect the contact position.

[14] According to yet another aspect of the present invention, there is also provided a method of manufacturing an ultrasonic touch screen protection panel for protecting an ultrasonic touch screen comprising: a non-piezoelectric substrate; a plurality of input piezoelectric elements which generate surface acoustic waves (SAWs) at one end of the X-direction and Y-direction of the non-piezoelectric substrate, respectively; and a plurality of reception piezoelectric elements that receive the surface acoustic waves (SAWs) at the other end of the X-direction and Y-direction of the non-piezoelectric substrate, respectively, in opposition to the plurality of input piezoelectric elements, and which protects the ultrasonic touch screen having a detection area for detecting a contact position when a finger or an article contacts a propagation path of the surface acoustic waves (SAWs) on the non-piezoelectric substrate, the ultrasonic touch screen protection panel manufacturing method comprising: an ultrasonic attenuation layer formation step of forming a transparent ultrasonic attenuation layer which has the same size as that of the detection area of the non-piezoelectric substrate and attenuates the surface acoustic waves (SAWs), in a space portion of a transparent film flat sheet that is formed in the same size as that of the non-piezoelectric substrate and has the space portion on the rear surface of the transparent film flat sheet; an ultrasonic transmission layer formation step of forming an ultrasonic transmission layer including a number of protrusions that transmits the surface acoustic waves (SAWs) on the rear surface of the ultrasonic attenuation layer; and an adhesion step of fixedly attaching the film flat sheet to both edges of the non-piezoelectric substrate, whereby attenuation of the surface acoustic waves (SAWs) of the non-piezoelectric substrate is attained by the ultrasonic attenuation layer at a contact position between the finger or the article and the film flat sheet when the finger or the article contacts the film flat sheet, to thereby detect the contact position.

[15] According to still yet another aspect of the present invention, there is also provided a method of manufacturing an ultrasonic touch screen protection panel for protecting an ultrasonic touch screen comprising: a non-piezoelectric substrate; a plurality of input piezoelectric elements which generate surface acoustic waves (SAWs) at one end of the X-direction and Y-direction of the non-piezoelectric substrate, respectively; and a plurality of reception piezoelectric elements that receive the surface acoustic waves (SAWs) at the other end of the X-direction and Y-direction of the non-piezoelectric substrate, respectively, in opposition to the plurality of input piezoelectric elements, and which protects the ultrasonic touch screen having a detection area for detecting a contact position when a finger or an article contacts a propagation path of the surface acoustic waves (SAWs) on the non-piezoelectric substrate, the ultrasonic touch screen protection panel manufacturing method comprising: an ultrasonic attenuation layer formation step of forming a transparent ultrasonic attenuation layer which attenuates the surface acoustic waves (SAWs), on the rear surface of the transparent film flat sheet; and an ultrasonic transmission layer formation step of forming an ultrasonic transmission layer including a number of protrusions that transmits the surface acoustic waves (SAWs) on the rear surface of the ultrasonic attenuation layer, whereby attenuation of the surface acoustic waves (SAWs) of the non-piezoelectric substrate is attained by the ultrasonic attenuation layer which blocks the propagation path of the surface acoustic waves (SAWs) on the non-piezoelectric substrate, at a contact position between the finger or the article and the film flat sheet when the finger or the article contacts the film flat sheet, to thereby detect the contact position. [16] Preferably but not necessarily, the ultrasonic transmission layer comprises the protrusions formed by a silk screen printing using ultraviolet photosetting ink on the rear surface of the ultrasonic attenuation layer.

Advantageous Effects

[17] As described above, according to the features of the present invention, a protection panel for an ultrasonic touch screen and a method of manufacturing the same according to the present invention can make the touch screen operate normally, can prevent damage of the surface of a non-piezoelectric substrate in the touch screen, and can prevent pollutant materials such as oil, saliva, water or dust which attenuates surface acoustic waves (SAWs) from being polluted on the non-piezoelectric substrate. As a result, occurrence of a malfunction can be prevented at the time of detection of a contact position, and damage of input piezoelectric elements and reception piezoelectric elements can be prevented by the pollutant. Brief Description of the Drawings

[18] The above and/or other objects and/or advantages of the present invention will become more apparent by describing the preferred embodiments thereof in detail with reference to the accompanying drawings in which:

[19] FIG. 1 is a perspective view showing a general ultrasonic touch screen;

[20] FIG. 2 is a plan view showing an ultrasonic touch screen of FIG. 1 ;

[21] FIG. 3 is a cross-sectional view showing the ultrasonic touch screen of FIG. 1;

[22] FIG. 4 is an exploded perspective view showing a protection panel for an ultrasonic touch screen according to an embodiment of the present invention;

[23] FIGS. 5 to 9 are cross-sectional views for a method of manufacturing a protection panel for an ultrasonic touch screen according to an embodiment of the present invention, respectively;

[24] FIG. 10 is a flowchart view illustrating a manufacturing process of the protection panel for an ultrasonic touch screen of FIG. 4;

[25] FIG. 11 is an exploded perspective view showing a protection panel for an ultrasonic touch screen according to another embodiment of the present invention;

[26] FIGS. 12 to 16 are cross-sectional views for a method of manufacturing a protection panel for an ultrasonic touch screen according to another embodiment of the present invention, respectively;

[27] FIG. 17 is a flowchart view illustrating the manufacturing process of the protection panel for an ultrasonic touch screen of FIG. 11. Best Mode for Carrying Out the Invention

[28] Hereinbelow, an ultrasonic touch screen protection panel and a method of manufacturing the same according to respective preferred embodiments of the present invention will be described with reference to the accompanying drawings. Like reference numerals denote like elements through the following embodiments.

[29] FIG. 4 is an exploded perspective view showing a protection panel for an ultrasonic touch screen according to an embodiment of the present invention. FIGS. 5 to 9 are cross-sectional views for a method of manufacturing a protection panel for an ultrasonic touch screen according to an embodiment of the present invention, respectively. FIG. 10 is a flowchart view illustrating a manufacturing process of the protection panel for an ultrasonic touch screen of FIG. 4.

[30] A shown in FIGS. 4 to 10, a protection panel for an ultrasonic touch screen according to an aspect of the present invention includes: a transparent film flat sheet 10 that is formed in the same size as that of a non-piezoelectric substrate 11, has a space portion 10a on the rear surface of the transparent film flat sheet 10, and are fixedly attached to both edges of the non-piezoelectric substrate 11 ; a transparent ultrasonic attenuation layer 20 which is attached to the space portion 10a of the rear surface of the film flat sheet 10, has the same size as that of a detection area 17 of the non- piezoelectric substrate 11, and attenuates the surface acoustic waves (SAWs); and an ultrasonic transmission layer 30 including a number of protrusions 31 that transmits the surface acoustic waves (SAWs) on the rear surface of the ultrasonic attenuation layer 20. Accordingly, attenuation of the surface acoustic waves (SAWs) of the non- piezoelectric substrate 11 is attained by the ultrasonic attenuation layer 20 at a contact position between the finger or the article and the film flat sheet when the finger or the article contacts the film flat sheet 10 to thereby detect the contact position.

[31] As illustrated in FIG. 10, an ultrasonic touch screen protection panel manufacturing method according to another aspect of the present invention includes: an ultrasonic attenuation layer formation step (SlO) of forming a transparent ultrasonic attenuation layer 20 which has the same size as that of a detection area 17 of a non-piezoelectric substrate 11 and attenuates the surface acoustic waves (SAWs), in a space portion of a transparent film flat sheet 10 that is formed in the same size as that of the non- piezoelectric substrate 11 and has a space portion 10a on the rear surface of the transparent film flat sheet 10; an ultrasonic transmission layer formation step (S20) of forming an ultrasonic transmission layer 30 including a number of protrusions 31 that transmits the surface acoustic waves (SAWs) on the rear surface of the ultrasonic attenuation layer 20; and an adhesion step (S30) of fixedly attaching the film flat sheet 10 to both edges of the non-piezoelectric substrate 10. Accordingly, attenuation of the surface acoustic waves (SAWs) of the non-piezoelectric substrate 11 is attained by the ultrasonic attenuation layer 20 at a contact position between a finger or an article and the film flat sheet 10 when the finger or the article contacts the film flat sheet 10, to thereby detect the contact position. [32] The ultrasonic transmission layer 30 includes the protrusions 31 formed by a silk screen printing using ultraviolet photosetting ink on the rear surface of the ultrasonic attenuation layer 20.

[33] FIG. 11 is an exploded perspective view showing a protection panel for an ultrasonic touch screen according to another embodiment of the present invention. FIGS. 12 to 16 are cross-sectional views for a method of manufacturing a protection panel for an ultrasonic touch screen according to another embodiment of the present invention, respectively. FIG. 17 is a flowchart view illustrating the manufacturing process of the protection panel for an ultrasonic touch screen of FIG. 11.

[34] As illustrated in FIGS. 11 to 17, an ultrasonic touch screen protection panel according to another embodiment of the present invention includes: a transparent film flat sheet 110 that is formed in the same size as that of the non-piezoelectric substrate 11, has a space portion 110a on the rear surface of the transparent film flat sheet, and are fixedly attached to both edges of the non-piezoelectric substrate 11 ; a transparent ultrasonic attenuation layer 120 which is attached to the space portion 110a of the rear surface of the film flat sheet 110, has the same size as that of a detection area 17 of the non-piezoelectric substrate 11, and attenuates the surface acoustic waves (SAWs); and an ultrasonic transmission layer 130 including a number of protrusions 131 that transmits the surface acoustic waves (SAWs) on the detection area 17 of the front surface of the non-piezoelectric substrate 11. Accordingly, attenuation of the surface acoustic waves (SAWs) of the non-piezoelectric substrate 11 is attained by the ultrasonic attenuation layer 120 at a contact position between a finger or an article and the film flat sheet 110 when the finger or the article contacts the film flat sheet 110 to thereby detect the contact position.

[35] As illustrated in FIG. 17, an ultrasonic touch screen protection panel manufacturing method according to another embodiment of the present invention includes: an ultrasonic attenuation layer formation step (Sl 10) of forming a transparent ultrasonic attenuation layer 120 which has the same size as that of a detection area of a non- piezoelectric substrate 11 and attenuates the surface acoustic waves (SAWs), in a space portion 110a of a transparent film flat sheet 120 that is formed in the same size as that of the non-piezoelectric substrate 11 and has the space portion 110a on the rear surface of the transparent film flat sheet 120; an ultrasonic transmission layer formation step (S 120) of forming an ultrasonic transmission layer 130 including a number of protrusions 131 that transmits the surface acoustic waves (SAWs) in the detection area on the front surface of the non-piezoelectric substrate 11; and an adhesion step (S 130) of fixedly attaching the film flat sheet 110 to both edges of the non-piezoelectric substrate 11. Accordingly, attenuation of the surface acoustic waves (SAWs) of the non-piezoelectric substrate 11 is attained by the ultrasonic attenuation layer 120 at a contact position between a finger or an article and the film flat sheet 110 when the finger or the article contacts the film flat sheet 110, to thereby detect the contact position.

[36] The ultrasonic transmission layer 130 includes the protrusions 131 formed by a silk screen printing using ultraviolet photosetting ink on the front surface of the non- piezoelectric substrate 11.

[37] The protection panel for an ultrasonic touch screen and the method of manufacturing the same according to the present invention having the above-described configuration will follow.

[38] Referring to FIGS. 4 to 10, a method of manufacturing a protection panel for an ultrasonic touch screen according to a first embodiment of the present invention will be described below.

[39] As illustrated in FIG. 4, an ultrasonic touch screen to which the present invention is applied has the same composition as that of a conventional ultrasonic touch screen. That is, the ultrasonic touch screen to which the present invention is applied includes: a non-piezoelectric substrate 11 made of a glass material; a plurality of input piezoelectric elements 13 which generate surface acoustic waves (SAWs) at one end of the X-direction and Y-direction of the non-piezoelectric substrate 11, respectively; and a plurality of reception piezoelectric elements 15 that receive the surface acoustic waves (SAWs) at the other end of the X-direction and Y-direction of the non- piezoelectric substrate 11, respectively, in opposition to the plurality of input piezoelectric elements 13. An area that is shown as a dashed line is a detection area 17 that can detect contact positions. Areas which are located at the peripheral portion where the input piezoelectric elements 13 and the reception piezoelectric elements 15 are installed are a frame area 19.

[40] As illustrated in FIGS. 5 and 6, at an ultrasonic attenuation layer formation step

(SlO), a transparent ultrasonic attenuation layer 20 which has the same size as that of a detection area 17 of the non-piezoelectric substrate 11 and attenuates the surface acoustic waves (SAWs) such as urethane rubber, is formed in a space portion 10a of a transparent film flat sheet 10 that is made of a transparent material such as acryl or polycarbonate, PET (poly ethylen terephthalate), etc., and formed in the same size as that of the non-piezoelectric substrate 11 and has the space portion 10a on the rear surface of the transparent film flat sheet 10.

[41] However, without forming the space department 10 on the rear surface of the film flat sheet 10, the ultrasonic attenuation layer 20 which attenuates the surface acoustic waves (SAWs) may be formed on the rear surface of the film flat sheet 10.

[42] As illustrated in FIG. 7, at an ultrasonic transmission layer formation step (S20), an ultrasonic transmission layer 30 including a number of protrusions 31 that are formed of a material which can transmit the surface acoustic waves (SAWs), for example, a print layer formed by a silk screen printing using ink, in particular, ultraviolet pho- tosetting ink, is formed on the rear surface of the ultrasonic attenuation layer 20.

[43] As illustrated in FIG. 8, at an adhesion step (S30), the film flat sheet 10 is fixedly attached to both edges of the non-piezoelectric substrate 11, using an adhesive 40.

[44] When the ultrasonic touch screen having the above-described configuration is not made to operate, that is, when there is no contact between the film flat sheet 10 and a finger or an article, the surface acoustic waves (SAWs) generated by the input piezoelectric elements 13 transmit through the ultrasonic transmission layer 30 having a number of protrusions 31 in the detection area 17 on the non-piezoelectric substrate 11. Accordingly, the reception piezoelectric elements 15 do not cause attenuation of the levels of the received surface acoustic waves (SAWs).

[45] As illustrated in FIG. 9, when a finger or an article contacts the film flat sheet 10 in order to make the ultrasonic touch screen operate, the ultrasonic attenuation layer 20 at a contact position is pressed toward a propagation path of the surface acoustic waves (SAWs) on the non-piezoelectric substrate 11. Accordingly, since the propagation path of the surface acoustic waves (SAWs) is blocked, the signal levels of the surface acoustic waves (SAWs) received by the reception piezoelectric elements 15 are attenuated to thus detect the contact position.

[46] Therefore, the touch screen can normally operate by the ultrasonic touch screen protection panel according to the present invention. In addition, the ultrasonic touch screen protection panel according to the present invention can prevent damage of the surface of a non-piezoelectric substrate 11 in the touch screen, and can prevent pollutant materials such as oil, saliva, water or dust which attenuates surface acoustic waves (SAWs) from being polluted on the non-piezoelectric substrate 11. As a result, occurrence of a malfunction can be prevented at the time of detection of a contact position, and damage of input piezoelectric elements 13 and reception piezoelectric elements 15 can be prevented by the pollutant.

[47] A method of manufacturing a protection panel for an ultrasonic touch screen according to a second embodiment of the present invention which is illustrated in FIGS. 11 to 17, is similar to that of the first embodiment of the present invention, but the ultrasonic transmission layer 130 having protrusions 131 at the ultrasonic transmission layer formation step (S 120) is formed on the front surface of the non- piezoelectric substrate 11, in the case of the second embodiment of the present invention.

[48] That is, as illustrated in FIGS. 12 to 16, at an ultrasonic attenuation layer formation step (Sl 10), a transparent ultrasonic attenuation layer 120 which has the same size as that of a detection area 17 of the non-piezoelectric substrate 11 and attenuates the surface acoustic waves (SAWs), is formed in a space portion 110a of a transparent film flat sheet 110 and formed in the same size as that of the non-piezoelectric substrate 11 and has the space portion 110a on the rear surface of the transparent film flat sheet 110. At an ultrasonic transmission layer formation step (S 120), an ultrasonic transmission layer 130 including a number of protrusions 131 that transmit the surface acoustic waves (SAWs) is formed on the detection area 17 in the front surface of the non-piezoelectric substrate 11. At an adhesion step (S130), the film flat sheet 110 is fixedly attached to both edges of the non-piezoelectric substrate 11, using an adhesive 140.

[49] In the case of the ultrasonic touch screen protection panel according to the second embodiment of the present invention, when the ultrasonic touch screen having the above-described configuration is not made to operate, that is, when there is no contact between the film flat sheet 110 and a finger or an article, the surface acoustic waves (SAWs) generated by the input piezoelectric elements 13 transmit through the ultrasonic transmission layer 130 having a number of protrusions 131 formed by a silk screen printing using ultraviolet photosetting ink on the front surface of the non- piezoelectric substrate 11. Accordingly, the reception piezoelectric elements 15 do not cause attenuation of the levels of the received surface acoustic waves (SAWs). Meanwhile, when a finger or an article contacts the film flat sheet 110 in order to make the ultrasonic touch screen operate, the ultrasonic attenuation layer 120 at a contact position is pressed toward a propagation path of the surface acoustic waves (SAWs) on the non-piezoelectric substrate 11. Accordingly, since the propagation path of the surface acoustic waves (SAWs) is blocked, the signal levels of the surface acoustic waves (SAWs) received by the reception piezoelectric elements 15 are attenuated to thus detect the contact position. Mode for the Invention

[50] As described above, the present invention has been described with respect to particularly preferred embodiments. However, the present invention is not limited to the above embodiments, and it is possible for one who has an ordinary skill in the art to make various modifications and variations, without departing off the spirit of the present invention. Thus, the protective scope of the present invention is not defined within the detailed description thereof but is defined by the claims to be described later and the technical spirit of the present invention. Industrial Applicability

[51] As described above, the present invention provides a protection panel for an ultrasonic touch screen and a method of manufacturing the same, in which cutoff of a surface acoustic wave (SAW) is detected using an ultrasonic wave generated from comb-style electrodes of a piezoelectric device to thus protect surface of the ultrasonic touch screen that detects the contact position and prevent inferiority according to detection of the contact position.

Claims

Claims
[1] A protection panel for an ultrasonic touch screen comprising: a non-piezoelectric substrate; a plurality of input piezoelectric elements which generate surface acoustic waves (SAWs) at one end of the X-direction and Y-direction of the non- piezoelectric substrate, respectively; and a plurality of reception piezoelectric elements that receive the surface acoustic waves (SAWs) at the other end of the X-direction and Y-direction of the non-piezoelectric substrate, respectively, in opposition to the plurality of input piezoelectric elements, and which protects the ultrasonic touch screen having a detection area for detecting a contact position when a finger or an article contacts a propagation path of the surface acoustic waves (SAWs) on the non-piezoelectric substrate, wherein the ultrasonic touch screen protection panel comprises: a transparent film flat sheet that is formed in the same size as that of the non- piezoelectric substrate, has a space portion on the rear surface of the transparent film flat sheet, and are fixedly attached to both edges of the non-piezoelectric substrate; a transparent ultrasonic attenuation layer which is attached to the space portion of the rear surface of the film flat sheet, has the same size as that of the detection area of the non-piezoelectric substrate, and attenuates the surface acoustic waves (SAWs); and an ultrasonic transmission layer including a number of protrusions that transmits the surface acoustic waves (SAWs) on the rear surface of the ultrasonic attenuation layer, whereby attenuation of the surface acoustic waves (SAWs) of the non- piezoelectric substrate is attained by the ultrasonic attenuation layer at a contact position between the finger or the article and the film flat sheet when the finger or the article contacts the film flat sheet to thereby detect the contact position.
[2] The ultrasonic touch screen protection panel according to claim 1, wherein the ultrasonic transmission layer comprises the protrusions formed by a silk screen printing using ultraviolet photosetting ink on the rear surface of the ultrasonic attenuation layer.
[3] A method of manufacturing an ultrasonic touch screen protection panel for protecting an ultrasonic touch screen comprising: a non-piezoelectric substrate; a plurality of input piezoelectric elements which generate surface acoustic waves (SAWs) at one end of the X-direction and Y-direction of the non-piezoelectric substrate, respectively; and a plurality of reception piezoelectric elements that receive the surface acoustic waves (SAWs) at the other end of the X-direction and Y-direction of the non-piezoelectric substrate, respectively, in opposition to the plurality of input piezoelectric elements, and which protects the ultrasonic touch screen having a detection area for detecting a contact position when a finger or an article contacts a propagation path of the surface acoustic waves (SAWs) on the non-piezoelectric substrate, the ultrasonic touch screen protection panel manufacturing method comprising: an ultrasonic attenuation layer formation step of forming a transparent ultrasonic attenuation layer which has the same size as that of the detection area of the non- piezoelectric substrate and attenuates the surface acoustic waves (SAWs), in a space portion of a transparent film flat sheet that is formed in the same size as that of the non-piezoelectric substrate and has the space portion on the rear surface of the transparent film flat sheet; an ultrasonic transmission layer formation step of forming an ultrasonic transmission layer including a number of protrusions that transmits the surface acoustic waves (SAWs) on the rear surface of the ultrasonic attenuation layer; and an adhesion step of fixedly attaching the film flat sheet to both edges of the non- piezoelectric substrate, whereby attenuation of the surface acoustic waves (SAWs) of the non- piezoelectric substrate is attained by the ultrasonic attenuation layer at a contact position between the finger or the article and the film flat sheet when the finger or the article contacts the film flat sheet, to thereby detect the contact position.
[4] The ultrasonic touch screen protection panel manufacturing method of claim 3, wherein the ultrasonic transmission layer comprises the protrusions formed by a silk screen printing using ultraviolet photosetting ink on the rear surface of the ultrasonic attenuation layer.
[5] A protection panel for an ultrasonic touch screen comprising: a non-piezoelectric substrate; a plurality of input piezoelectric elements which generate surface acoustic waves (SAWs) at one end of the X-direction and Y-direction of the non- piezoelectric substrate, respectively; and a plurality of reception piezoelectric elements that receive the surface acoustic waves (SAWs) at the other end of the X-direction and Y-direction of the non-piezoelectric substrate, respectively, in opposition to the plurality of input piezoelectric elements, and which protects the ultrasonic touch screen having a detection area for detecting a contact position when a finger or an article contacts a propagation path of the surface acoustic waves (SAWs) on the non-piezoelectric substrate, wherein the ultrasonic touch screen protection panel comprises: a transparent film flat sheet that is formed in the same size as that of the non- piezoelectric substrate, has a space portion on the rear surface of the transparent film flat sheet, and are fixedly attached to both edges of the non-piezoelectric substrate; a transparent ultrasonic attenuation layer which is attached to the space portion of the rear surface of the film flat sheet, has the same size as that of the detection area of the non-piezoelectric substrate, and attenuates the surface acoustic waves (SAWs); and an ultrasonic transmission layer including a number of protrusions that transmits the surface acoustic waves (SAWs) in the detection area on the front surface of the non-piezoelectric substrate, whereby attenuation of the surface acoustic waves (SAWs) of the non- piezoelectric substrate is attained by the ultrasonic attenuation layer at a contact position between the finger or the article and the film flat sheet when the finger or the article contacts the film flat sheet to thereby detect the contact position.
[6] The ultrasonic touch screen protection panel according to claim 5, wherein the ultrasonic transmission layer comprises the protrusions formed by a silk screen printing using ultraviolet photosetting ink on the front surface of the non- piezoelectric substrate.
[7] A method of manufacturing an ultrasonic touch screen protection panel for protecting an ultrasonic touch screen comprising: a non-piezoelectric substrate; a plurality of input piezoelectric elements which generate surface acoustic waves (SAWs) at one end of the X-direction and Y-direction of the non-piezoelectric substrate, respectively; and a plurality of reception piezoelectric elements that receive the surface acoustic waves (SAWs) at the other end of the X-direction and Y-direction of the non-piezoelectric substrate, respectively, in opposition to the plurality of input piezoelectric elements, and which protects the ultrasonic touch screen having a detection area for detecting a contact position when a finger or an article contacts a propagation path of the surface acoustic waves (SAWs) on the non-piezoelectric substrate, the ultrasonic touch screen protection panel manufacturing method comprising: an ultrasonic attenuation layer formation step of forming a transparent ultrasonic attenuation layer which has the same size as that of the detection area of the non- piezoelectric substrate and attenuates the surface acoustic waves (SAWs), in a space portion of a transparent film flat sheet that is formed in the same size as that of the non-piezoelectric substrate and has the space portion on the rear surface of the transparent film flat sheet; an ultrasonic transmission layer formation step of forming an ultrasonic transmission layer including a number of protrusions that transmits the surface acoustic waves (SAWs) in the detection area on the front surface of the non- piezoelectric substrate; and an adhesion step of fixedly attaching the film flat sheet to both edges of the non- piezoelectric substrate, whereby attenuation of the surface acoustic waves (SAWs) of the non- piezoelectric substrate is attained by the ultrasonic attenuation layer at a contact position between the finger or the article and the film flat sheet when the finger or the article contacts the film flat sheet, to thereby detect the contact position.
[8] The ultrasonic touch screen protection panel manufacturing method of claim 7, wherein the ultrasonic transmission layer comprises the protrusions formed by a silk screen printing using ultraviolet photosetting ink on the front surface of the non-piezoelectric substrate.
[9] A method of manufacturing an ultrasonic touch screen protection panel for protecting an ultrasonic touch screen comprising: a non-piezoelectric substrate; a plurality of input piezoelectric elements which generate surface acoustic waves (SAWs) at one end of the X-direction and Y-direction of the non-piezoelectric substrate, respectively; and a plurality of reception piezoelectric elements that receive the surface acoustic waves (SAWs) at the other end of the X-direction and Y-direction of the non-piezoelectric substrate, respectively, in opposition to the plurality of input piezoelectric elements, and which protects the ultrasonic touch screen having a detection area for detecting a contact position when a finger or an article contacts a propagation path of the surface acoustic waves (SAWs) on the non-piezoelectric substrate, the ultrasonic touch screen protection panel manufacturing method comprising: an ultrasonic attenuation layer formation step of forming a transparent ultrasonic attenuation layer which attenuates the surface acoustic waves (SAWs), on the rear surface of the transparent film flat sheet; and an ultrasonic transmission layer formation step of forming an ultrasonic transmission layer including a number of protrusions that transmits the surface acoustic waves (SAWs) on the rear surface of the ultrasonic attenuation layer, whereby attenuation of the surface acoustic waves (SAWs) of the non- piezoelectric substrate is attained by the ultrasonic attenuation layer which blocks the propagation path of the surface acoustic waves (SAWs) on the non- piezoelectric substrate, at a contact position between the finger or the article and the film flat sheet when the finger or the article contacts the film flat sheet, to thereby detect the contact position.
[10] The ultrasonic touch screen protection panel manufacturing method of claim 9, wherein the ultrasonic transmission layer comprises the protrusions formed by a silk screen printing using ultraviolet photosetting ink on the front surface of the non-piezoelectric substrate.
PCT/KR2007/003881 2006-08-17 2007-08-14 Protection panel for ultrasonic touch screen and method of manufacturing the same WO2008020699A1 (en)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2011149793A1 (en) * 2010-05-28 2011-12-01 Tyco Electronics Corporation Multi-layer coversheet for saw touch panel
US8922529B2 (en) 2011-02-28 2014-12-30 Remote Solution Co., Ltd. Touch sensor system using touch point vibration
US9836157B2 (en) 2014-09-22 2017-12-05 Hyundai Motor Company Acoustic user interface apparatus and method for recognizing touch and rubbing

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101099598B1 (en) 2010-05-07 2011-12-29 한국세라믹기술원 Combined piezoelectric haptic touch panel module and screen module
KR101257028B1 (en) 2011-08-30 2013-05-02 경북대학교 산학협력단 A touch sensor system using a vibration of a RBI
KR101284914B1 (en) 2011-10-18 2013-07-10 경북대학교 산학협력단 touch sensor system using of touch point vibration
KR101284913B1 (en) 2011-10-27 2013-07-10 경북대학교 산학협력단 touch sensor system using of touch point vibration
KR101284912B1 (en) 2011-10-27 2013-07-10 경북대학교 산학협력단 touch sensor system using of touch point vibration
KR101676539B1 (en) 2014-12-19 2016-11-15 주식회사 우정하이텍 Metal Plate Touch Apparatus with Accurate and Stable Touch Recognition using Piezo Effect
KR101720947B1 (en) * 2015-11-02 2017-03-29 현대자동차주식회사 Input apparatus, vehicle comprising the same and control method for the vehicle
KR101781629B1 (en) 2016-10-12 2017-09-25 주식회사 우정하이텍 Metal Plate Touch Apparatus with Accurate and Stable Touch Recognition using Piezo Effect

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4737634A (en) * 1985-04-18 1988-04-12 Alps Electric Co., Ltd. Filter for photoelectric touch panel including light scattering or absorbing protrusions
US5708461A (en) * 1995-01-24 1998-01-13 Elo Touchsystems, Inc. Acoustic touch position sensor using a low-loss transparent substrate
US20020101408A1 (en) * 2001-01-26 2002-08-01 Fujitsu Limted Touch panel device
US20030146673A1 (en) * 2000-12-01 2003-08-07 Kouji Toda Ultrasonic touch panel

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2003099203A (en) * 2001-09-21 2003-04-04 Aiphone Co Ltd Optical touch panel device

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4737634A (en) * 1985-04-18 1988-04-12 Alps Electric Co., Ltd. Filter for photoelectric touch panel including light scattering or absorbing protrusions
US5708461A (en) * 1995-01-24 1998-01-13 Elo Touchsystems, Inc. Acoustic touch position sensor using a low-loss transparent substrate
US20030146673A1 (en) * 2000-12-01 2003-08-07 Kouji Toda Ultrasonic touch panel
US20020101408A1 (en) * 2001-01-26 2002-08-01 Fujitsu Limted Touch panel device

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2011149793A1 (en) * 2010-05-28 2011-12-01 Tyco Electronics Corporation Multi-layer coversheet for saw touch panel
US8638318B2 (en) 2010-05-28 2014-01-28 Elo Touch Solutions, Inc. Multi-layer coversheet for saw touch panel
US8922529B2 (en) 2011-02-28 2014-12-30 Remote Solution Co., Ltd. Touch sensor system using touch point vibration
US9836157B2 (en) 2014-09-22 2017-12-05 Hyundai Motor Company Acoustic user interface apparatus and method for recognizing touch and rubbing

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