WO2014082497A1 - Cascade partition surface acoustic wave touch screen with hidden touch components - Google Patents

Abstract

A cascade partition surface acoustic wave touch screen with hidden touch components comprises a screen body (1), a touch area (19) which increases an effective touch scope in a cascade touch partition mode and is arranged on a front view projection plane of the screen body (1), and a plurality of reflector cell arrays (10, 11, 12, 13, 14, 15, 16, 17) and energy converters (2, 3, 4, 5, 6, 7, 8, 9) which are arranged on the periphery of the screen body (1). The reflector cell arrays (10, 11, 12, 13, 14, 15, 16, 17) and the energy converters (2, 3, 4, 5, 6, 7, 8, 9) form touch components, and the touch components are coupled on the back of the front view projection plane of the touch area (19), that is, on the back of the touch body (1). Printing ink (18) which is used for hiding the touch components is painted on the back of the touch body (1) along the acoustic energy travel path direction, and the back of the touch body (1) comprises a plane and a transition plane (20). The energy converters (2, 3, 4, 5, 6, 7, 8, 9) are arranged in the corners of the screen body (1).

Description

 Touch device concealed cascading partition surface acoustic wave touch.

Especially - 'Touch ΐ

背景技术'

Background technique'

 The common surface acoustic wave touch exhibition consists of a screen substrate, a transmitting transducer, a receiving transducer, a reflecting unit array, and a signal line. To locate the touch coordinates, typically the array of reflective elements and the transducer are coupled to the same touch plane. Touch devices typically include a transmit transducer, a receive transducer, a reflective unit array, and a signal line. The existing surface acoustic wave. The touch screen is difficult to install and optimize because the reflective unit array and the transducer are distributed on the same touch plane and occupy a certain position. Especially when designing a frameless structure, the transducer is significantly higher than the touch surface and cannot be hidden.

 Although the prior art proposes to grind the corresponding transducer position on the corner of the screen to a beveled edge, the transducer is coupled to the beveled edge so that the transducer is substantially no higher than the touched surface, simplifying the front frame structure. However, the touch screen stripe in this way is still visible in the front view direction, and the purpose of hiding the touch device is not achieved.

 Patent Document CN2546945Y proposes a surface acoustic wave touch screen in which the reflective unit array and the touch surface are not in the same plane, but the transducer is still in the front view direction of the touch screen, and the purpose of hiding the touch device cannot be achieved.

 Patent document CN202I 33983U proposes a surface acoustic wave touch screen in which a reflective unit array and a transducer are placed on different planes. Although the patent places the transducer on the back side of the touch surface, the reflective unit array is still placed on the touch surface, The purpose of hiding the touch device is achieved, and the position of the reflective unit array cannot be touched, and there is a blind spot.

 Patent Document CN202495017U proposes a surface acoustic wave screen which completely places the touch device on the non-touch surface, but it is difficult to realize a large-sized surface acoustic wave touch screen due to the influence of surface acoustic wave propagation attenuation.

At the same time, due to the selection limitation of the touch screen substrate, the surface acoustic wave energy is exponentially attenuated during the substrate transmission process, and the surface acoustic wave touch screen realized by the above patent is realized only for the small and medium size. It is currently known that a large-sized surface acoustic wave touch screen can be realized by a substrate that preferably transmits surface acoustic waves or a method of reducing the frequency of surface acoustic wave transmission, but the former is generally more costly. High, the latter limits the thickness of the touch screen substrate and reduces the sensitivity of the touch.

 In view of the deficiencies in the prior art, the present invention proposes on the basis of the disclosure of the patent document CN202495017U that the purpose of increasing the touch area is achieved by cascading touch partitioning while implementing the hidden touch device.

 Further, the object of the present invention is to provide a concatenated zonal surface acoustic wave touch screen for realizing a touch surface without a blind spot, ensuring touch screen performance, and realizing a touch device of a large-sized surface acoustic wave touch screen, and enhancing sound energy transmission on the screen body. Strength, reducing the energy loss of sound energy.

 In order to achieve the above object, the present invention provides a hidden cascading surface acoustic wave melting screen of a touch device, including a screen body, and a front view projection surface of the screen body is provided with a cascaded touch partitioning method to increase effective a touch area of the touch range and a plurality of reflective unit arrays disposed around the screen body and the transducer; the reflective unit array and the transducer constitute a touch device, and form a plurality of cascaded local effective touch areas, the touch The device is coupled to the back surface of the projection surface (ie, the back surface of the screen), and the back surface of the screen body is coated with printing ink for shielding the touch device along the direction of the sound energy propagation path, so that the back surface of the screen body is along the direction of the sound energy propagation path. Printing through the ink into an opaque state enhances the intensity of sound energy propagation on the screen, reduces the energy loss of sound energy transmitted from one surface to the other, and the touch area is disposed on the frontal image without any touch device, through the back The reflected sound energy can be transmitted to the touch surface, so that the touch surface can be completely free of blind spots. And, the effective touch area is increased by touching the area cascading. The back surface of the screen body includes a plane and a transition surface between the plane and the surface of the touch area, that is, the front surface of the screen body, and the transducer is installed at a corner 'position of the screen body.

 In some embodiments, a printed ink border for applying printing ink is disposed around the back of the screen body, and the touch device is disposed on the printing ink frame.

 The above transducers are provided with eight, and are arranged on the screen at the four corner positions of the printed ink frame on the screen; the reflective unit array is provided with eight, and is evenly disposed on the printing ink frame around the screen body; The energy device, the reflective unit array and the printing ink frame are arranged on a plane on the back side of the same screen body.

The screen body increases the effective touch area by cascading the touch area partitions, using a set of anti- The array of shot elements replaces the original array of reflective elements and adds corresponding transducer settings to divide the large-sized effective touch area into a plurality of cascaded small-sized effective touch areas.

 In some embodiments, the array of reflective cells disposed on the same side of the printing ink bezel is arranged from the ends to the center, respectively, from sparse to dense.

 In some embodiments, the transition surface is a smooth transition surface, and the radius of the circular transition surface is half the thickness of the screen. Further, the radius of the arc of the above smooth transition surface may be other lengths.

 In some embodiments, the transition surface is configured as an elliptical transition surface, and the arcuate radius of the palm transition surface is designed to any suitable length.

 In some embodiments, the transition surface can be configured as a beveled or trapezoidal surface. Further, the transition surface may be provided as a polished surface or a matte surface.

 In some embodiments, the transition surface is combined with the back surface of the screen and the surface where the touch area is located. The ridge line is a smooth transition, so that scattering and attenuation in the propagation of sound energy can be reduced.

 In some embodiments, the array of reflective elements has an angle 135 with the path axis along the direction of the acoustic energy propagation path. ± 5. arrangement. The reflective unit array includes a plurality of reflective stripes to ensure that the acoustic energy can be propagated along the screen body after being reflected by the reflective stripes of the reflective unit array. The angle between the direction of the acoustic energy propagation path and the axial direction of the reflection unit array can be designed to be other angles to ensure that the acoustic energy is reflected along the screen and then propagates outward along the screen.

 In some embodiments, the transition surface is a smooth transition to the interface of the back of the screen and the face where the touch area is located.

 In some embodiments, the front surface of the screen body is coated with the printing ink along the direction of the acoustic energy propagation path, that is, around the touch area, so that the front surface of the screen body is opaque.

 The above-mentioned printing ink printing can shield the touch device on the back of the screen body, so that no touch device can be seen from the frontal projection surface of the touch area; moreover, the printing ink printing material can enhance the intensity of sound energy transmission on the screen body, and reduce the sound energy by The energy loss of one face transmitted to the other.

 Compared with the prior art, the invention has the following beneficial effects:

1. The present invention places the transducer, the reflective stripe, and the touch screen signal line on the back side of the touch surface, so that the sound energy reflected by the reflective stripe bypasses the edge of the screen, forming a complete touch surface on the back surface of the coupled touch device, The back reflection sound energy can be transmitted to the touch surface. The touch surface is completely free of blind spots, ensuring touch performance.

 2. The touch component is on the back of the touch area and is located on the printing ink. The projection surface is facing the projection surface in the touch area, and no touch device can be seen.

 3. The back of the screen body enhances the energy of the sound energy through the printing ink, enhances the sound energy transmission intensity on the screen body, and reduces the energy loss of the sound energy transmitted from one surface to the other surface, ensuring that the performance of the touch screen is not affected.

 4. Increase the effective touch area by cascading the partition touch area, that is, replacing the original one of the reverse unit arrays with a set of reflective unit arrays, and adding corresponding transducer settings, thereby dividing the large-sized touch effective area. A large-sized surface acoustic wave Is screen is realized for a plurality of cascaded small-sized touch effective areas. DRAWINGS

 FIG. 1 is a schematic diagram of a three-dimensional structure of a non-touch area according to an embodiment of the invention.

 2 is a front elevational view of a touch area in accordance with an embodiment of the present invention.

 3 is a schematic view of a transition surface of various shapes of a screen body according to an embodiment of the present invention. 4 is a plan view of a surface acoustic wave propagation of a touch area according to an embodiment of the present invention.

 Fig. 5 is a schematic view showing the structure of a surface acoustic wave propagation path of a non-touch area in an embodiment of the present invention.

 Figure 6 is a schematic cross-sectional view of an embodiment of the present invention.

 Fig. 7 is a schematic cross-sectional view showing a surface acoustic wave propagation path of a non-touch area in an embodiment of the present invention.

 8 is a schematic cross-sectional view of a surface acoustic wave propagation path in a non-touch area according to another embodiment of the present invention;

 9 is a schematic perspective view of a typical design of a reflective unit array in accordance with an embodiment of the present invention. Figure 10 is a partial view of the M portion of Figure 9;

 Figure 11 is a schematic diagram showing a typical design of a conventional non-partitioned cascaded touch screen reflective cell array.

12 is a structural diagram showing a cascaded small-sized effective touch area according to an embodiment of the present invention. Concrete real way

 Embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

 1 - 3 schematically illustrate a touch device hidden cascade surface acoustic wave touch screen in accordance with an embodiment of the present invention. As shown in FIG. 1 and FIG. 2, a hidden cascading surface acoustic wave touch screen of the touch device of the present embodiment includes a screen body 1 and a touch area 19 disposed on the front view projection surface of the screen body 1. Compared with the conventional non-partitioned cascade touch screen shown in Fig. 11, the present invention adopts the figure! 2, the touch area] ί9 increases the touch range by cascading touch partitioning, that is, using a set of reflective unit arrays to fetch the original one of the anti-cell arrays, and adding corresponding transducer settings, through multiple The array of reflective cells and the corresponding transducer arrangement together divide the large-sized effective touch area into a plurality of cascaded small-sized effective touch areas 21, enabling large-scale surface acoustic wave Is touch.

 A transducer, a reflective unit array, and a printing ink frame 18 are mounted on the back of the screen. The transducer, the reflective unit array, and the touch screen signal line constitute a touch device, and the touch device is coupled to the back surface of the projection surface, that is, the back surface of the screen body, and the back surface of the screen body includes a plane and a plane between the plane and the touch area The transition surface 20; in this embodiment, the transducer and the reflective unit array are each provided with eight, respectively, the first transducer 2, the second transducer 3, the third transducer 4, and the fourth transducer 5, fifth transducer 6, sixth transducer 7, seventh transducer 8, eighth transducer 9, first reflective unit array! 0. The second anti-turn unit array 11, the third reflective unit array 12, the fourth inverse unit array 13, the fifth reflective unit array 14, the sixth reflective unit array 15, the seventh reflective unit array 16, and the eighth reflection Cell array 17. The transducer, the reflective unit array 1 and the printing ink frame 18 are located on the same plane, that is, on the plane of the back surface of the same screen.

 Referring to FIG. 5 to FIG. 7, after the acoustic energy emitted by each transducer of the embodiment is reflected by each of the reflective unit arrays, the transition surface 20 is bypassed, and a touch region 19 is formed on the front surface of the screen. Referring to Fig. 3, the transition surface 20 of the embodiment is a smooth transition surface, and the optimal radius of the circular arc of the smooth transition surface is set to be half of the thickness of the screen body. However, it is not limited to this embodiment, and the radius of the arc of the above-mentioned smooth transition surface may be other suitable lengths. In addition, the transition surface 20 can also be configured as an elliptical transition surface, a sloped surface, a trapezoidal surface, a polished surface or a matte surface, and the transition surface is a smooth transition with the surface of the screen body and the surface where the touch area is located to reduce sound energy. Scattering and attenuation during propagation.

See Figure 1, Figure 5 and Figure 6. Fixing for printing on the back of the screen Ink ink border of ink, first transducer 2, second transducer 3, third transducer 4, first transducer 5, fifth transducer 6, sixth transducer 7, seventh The transducer 8 and the eighth transducer 9 are respectively mounted at the corners of the printing ink frame, that is, the corners of the back of the screen. In this embodiment, the first transducer 2 and the second transducer 3 are located at the same corner, the third transducer 4 and the fourth transducer 5 are located at the same corner, and the fifth transducer 6 and the sixth transducer 7 are located at the same corner. Located in the same corner, the seventh transducer 8 and the eighth transducer 9 are located at the same corner. The first reflective unit array 10, the second reflective unit array 11, the third reverse unit array 12, the fourth reflective unit array 13, the fifth inverse, the radiation unit array 14, the sixth reflective unit array 15, and the seventh reflective unit array The 16 and eighth reflecting unit arrays 17 are respectively disposed on the printing ink frame, that is, around the back surface of the screen body. The first reflective unit array 10 is densely spaced from the second reflective unit array 11 and arranged on the same straight side of the back surface of the screen body; the third reflective unit array 12 is made up of the dense and fourth reflective unit array 13 The densely arranged on the back side of the screen body is opposite to the other straight side of the first reflective unit array 10 and the second reflective unit array 11; the fifth reflective unit array 14 is densely connected to the sixth reflective unit array 15 Arranged on the same straight side of the back of the screen; the seventh reflective unit array 16 is on the other straight side of the array 8 of the eighth reflective sixth reflective unit. On the back side of the screen body, that is, the printing ink side. The printing ink 18 is applied on the frame along the direction of the sound energy propagation path for shielding the touch device, that is, each transducer, the reflection unit array and the touch screen signal line, through the ink of the printing ink 18 The back side of the exhibition body is opaque along the direction of the acoustic energy propagation path. At the same time, the printing ink 18 is also applied in the direction of the acoustic energy propagation path on the front side of the screen body, so that the front side of the screen body is opaque along the direction of the sound energy propagation path, that is, the circumference of the touch area (see FIGS. 2 and 4). In this embodiment, the touch device on the back side of the screen body can be shielded by the printing ink 18 so that no touch device is visible from the front projection surface of the touch area 19; moreover, the printing material of the printing ink 18 can enhance the sound energy on the screen body. Propagation intensity reduces the energy loss of sound energy transmitted from one side to the other.

Referring to FIG. 5 to FIG. 10, the optimum angle a between the direction of the acoustic energy propagation path and the axial direction of the reflective unit array is 135. ± 5. Arrangement, in addition, the array of reflective elements can be designed at other angles along the direction of the acoustic energy propagation path and the axial direction of the path. The array of reflective elements includes a plurality of reflective stripes to ensure that acoustic energy is reflected along the reflective fringes and propagates outward along the screen. In addition, in the present invention, only the reflective stripes of the reflective unit array are disposed on the back of the touch J, the touch screen The screen processing technology is basically the same as the ordinary surface acoustic wave touch exhibition processing process, and does not increase the complexity of production.

 The touch assembly is on the back of the touch area 19 and is located on the printing ink 18. Face the projection surface in the touch area, you can't see any touch devices, and you really realize the borderless design. The back side of the screen body enhances the energy of the sound energy through the printing ink, enhances the intensity of sound energy transmission on the screen body 1, and reduces the energy loss of sound energy transmitted from one side to the other side, ensuring that the performance of the touch screen is not affected.

 The invention overcomes the above problems existing in the existing surface acoustic wave touch screen system, and the sound energy reflected by the reflective stripe bypasses the edge of the screen by placing the transducer, the reflective stripe and the touch screen signal line on the back side of the touch surface. A full touch surface is formed on the back side of the coupled touch device. At the same time, the sound energy propagation intensity on the screen body is enhanced, the energy loss of one side of the sound energy transmitted to the other surface is reduced, and no touch device is disposed on the front view projection surface in the touch area, and the sound energy is transmitted through the back side reflection sound energy. To the touch surface, the touch surface can be completely free of blind spots.

 The basic principles and main features of the present invention and the advantages of the present invention are shown and described above. It should be understood by those skilled in the art that the present invention is not limited by the foregoing embodiments, and that the present invention is described in the foregoing embodiments and the description of the present invention, without departing from the spirit and scope of the invention. Various changes and improvements, which fall within the scope of the claimed protection. The claimed scope of the invention is attached by the appended claims

Claims

claims 1. Touch device hidden cascade partition surface acoustic wave touch screen, including a screen body (1), characterized in that, the front projection surface of the screen body (1) is provided with a cascade touch partition method to increase the effective touch range The touch area (19) and a plurality of reflective unit arrays and transducers arranged around the screen body (1); the reflective unit array and transducer constitute a touch device and form multiple cascaded local effective touch areas. ; The touch device is coupled to the back of the screen (1), and the back of the screen (1) is coated with printing ink (18) for shielding the touch device along the direction of the sound energy propagation path. The screen (1) The back side includes a plane and a transition surface between the plane and the front side of the screen body (1), and the transducer is installed at a corner position of the screen body (1). 2. The touch device hidden cascade partition surface acoustic wave (SAW) touch screen according to claim 1, characterized in that there are printing pads for applying printing ink (18) around the back of the screen body (1). Ink (18) frame, the touch device is arranged on the printing ink (18) frame. 3. The touch device hidden cascade partition surface acoustic wave touch screen according to claim 2, characterized in that eight of the transducers are provided, and the ink (18) is evenly arranged on the screen body (1) ) The four corner positions of the frame; There are 8 reflective unit arrays, and they are evenly arranged on the printing ink (18) frame around the screen body (1); the transducer, reflective unit array and printing The ink (18) frame is arranged on the plane on the back of the same screen body (1). 4. The touch device hidden cascade partition surface acoustic wave integration device according to claim 3, characterized in that the reflective unit arrays arranged on the frame of the printing ink (18) on the same side are arranged from both ends to the middle. The density is arranged from sparse to dense. 5. The touch device hidden cascade partition surface acoustic wave tapping J according to claim 1, characterized in that the transition surface (20) is a smooth transition surface, and the arc radius of the smooth transition surface is the screen body (1) Half the thickness. 6. The touch device hidden cascade partition surface acoustic wave fusion touch screen according to claim 1, characterized in that the transition surface (20) is set as an elliptical transition surface, and the arc radius of the elliptical transition surface is to any length. 7. The touch device according to claim 1 hidden cascade partition surface acoustic wave touch It is characterized in that the transition surface (20) is set as an inclined surface or a trapezoidal surface 8. The touch device hidden cascade partition surface acoustic wave fusion touch screen according to claim 1, characterized in that the angle between the reflection unit array along the sound energy propagation path direction and the path axial direction is 135. ±5. arrangement. 9. The cascade partition surface acoustic wave touch screen with a hidden touch device according to any one of claims 1 to 6, characterized in that the transition surface (20) and the back of the screen body (1) and the touch area ( 19) The interface between the surfaces is a smooth transition. 10. The cascade partition surface acoustic wave touch screen with a hidden touch device according to any one of claims 1 to 6, characterized in that the front surface of the screen body (Π) is along the direction of the sound energy propagation path, that is, the touch area (19) Apply the printing ink (18) all around.