Patent Publication Number: US-2015070604-A1

Title: Touch device

Description:
BACKGROUND OF THE INVENTION 
     1. Field of the Invention 
     The present invention generally relates to a touch device, and more particularly, to a touch device including a touch sensing unit disposed on a thin substrate. 
     2. Description of the Prior Art 
     Touch sensing technologies are well-developed in recent years. Many consumer electronics, such as mobile phones and tablet PCs, are integrated with touch sensing functions. In those consumer electronics, display panels are mainly used to be integrated with the touch sensing function and perform as touch display panels. According to differences in structure designs, the touch display panels may include an out-cell type touch display panel, an in-cell type touch display panel, and an on-cell type touch display panel. In the out-cell type touch display panel, an independent touch panel is attached to a normal display panel. In the on-cell type and the in-cell type touch display panels, the touch sensing units are disposed on an inner side or an outer side of the substrate in the display panel. No matter what kind of the touch panel is, the thickness of the substrate generally used in the ordinary touch panel ranges between 0.4 millimeter and 0.55 millimeter, and the thickness condition cannot satisfy the thinner and compact demands of the touch panels in the related markets. 
     SUMMARY OF THE INVENTION 
     It is one of the objectives of the present invention to provide a touch device. A thin substrate having a thickness thicker than or equal to 0.05 millimeter and thinner than or equal to 0.25 millimeter is employed to achieve the purposes of lightweight and thinner designs. 
     To achieve the purposes described above, a preferred embodiment of the present invention provides a touch device. The touch device includes a cover substrate, a thin substrate, a first adhesive layer, a first touch sensing unit and a first outer unit. The thin substrate is disposed opposite to the cover substrate. The thin substrate has a first surface and a second surface opposite to the first surface. The first surface faces the cover substrate, and a thickness of the thin substrate is thicker than or equal to 0.05 millimeter and thinner than or equal to 0.25 millimeter. The first adhesive layer is disposed between the cover substrate and the thin substrate. The first touch sensing unit is disposed on the thin substrate. The first outer unit is electrically connected to the first touch sensing unit. 
     In the touch device of the present invention, the touch sensing unit is disposed on the thin substrate having a thickness thicker than or equal to 0.05 millimeter and thinner than or equal to 0.25 millimeter, and the touch panel may become thinner, compact and lightweight accordingly. 
     These and other objectives of the present invention will no doubt become obvious to those of ordinary skill in the art after reading the following detailed description of the preferred embodiment that is illustrated in the various figures and drawings. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         FIG. 1  is a schematic diagram illustrating a touch device according to a first embodiment of the present invention. 
         FIG. 2  is a schematic diagram illustrating a self-capacitance type first touch sensing unit according to the first embodiment of the present invention. 
         FIG. 3  is a schematic diagram illustrating a mutual-capacitance type first touch sensing unit according to the first embodiment of the present invention. 
         FIG. 4  is a schematic diagram illustrating another mutual-capacitance type first touch sensing unit according to the first embodiment of the present invention. 
         FIG. 5  is a schematic diagram illustrating another mutual-capacitance type first touch sensing unit according to the first embodiment of the present invention. 
         FIG. 6  is a schematic diagram illustrating a touch device according to a second embodiment of the present invention. 
         FIG. 7  is a schematic diagram illustrating a touch device according to a third embodiment of the present invention. 
         FIG. 8  is a schematic diagram illustrating a touch device according to a fourth embodiment of the present invention. 
         FIG. 9  is a schematic diagram illustrating a touch device according to a fifth embodiment of the present invention. 
         FIG. 10  is a schematic diagram illustrating a touch device according to a sixth embodiment of the present invention. 
         FIG. 11  is a schematic diagram illustrating a touch device according to a seventh embodiment of the present invention. 
         FIG. 12  is a schematic diagram illustrating a touch device according to an eighth embodiment of the present invention. 
         FIG. 13  is a schematic diagram illustrating a touch device according to a ninth embodiment of the present invention. 
         FIG. 14  is a schematic diagram illustrating a touch device according to a tenth embodiment of the present invention. 
         FIG. 15  is a schematic diagram illustrating a touch device according to an eleventh embodiment of the present invention. 
         FIG. 16  is a schematic diagram illustrating a touch device according to a twelfth embodiment of the present invention. 
         FIG. 17  is a schematic diagram illustrating a touch device according to a thirteen embodiment of the present invention. 
         FIG. 18  is a schematic diagram illustrating a touch device according to a fourteenth embodiment of the present invention. 
         FIG. 19  is a schematic diagram illustrating a touch device according to a fifteenth embodiment of the present invention. 
         FIG. 20  is a schematic diagram illustrating a touch device according to a sixteenth embodiment of the present invention. 
         FIG. 21  is a schematic diagram illustrating a touch device according to a seventeenth embodiment of the present invention. 
         FIG. 22 ,  FIG. 23 ,  FIG. 24 ,  FIG. 25 ,  FIG. 26 ,  FIG. 27  and  FIG. 28  are schematic diagrams illustrating allocation conditions of a cover substrate and a protection layer according to the seventeenth embodiment of the present invention. 
         FIG. 29  is a schematic diagram illustrating a touch device according to an eighteenth embodiment of the present invention. 
         FIG. 30  is a schematic diagram illustrating a touch device according to a nineteenth embodiment of the present invention. 
         FIG. 31  is a schematic diagram illustrating a touch device according to a twentieth embodiment of the present invention. 
         FIG. 32  is a schematic diagram illustrating a touch device according to a twenty-first embodiment of the present invention. 
         FIG. 33  is a schematic diagram illustrating a touch device according to a twenty-second embodiment of the present invention. 
         FIG. 34  is a schematic diagram illustrating a touch device according to a twenty-third embodiment of the present invention. 
         FIG. 35  is a schematic diagram illustrating a touch device according to a twenty-fourth embodiment of the present invention. 
         FIG. 36  is a schematic diagram illustrating a touch device according to a twenty-fifth embodiment of the present invention. 
         FIG. 37  is a schematic diagram illustrating a touch device according to a twenty-sixth embodiment of the present invention. 
         FIG. 38  is a schematic diagram illustrating a touch device according to a twenty-seventh embodiment of the present invention. 
         FIG. 39  is a schematic diagram illustrating a touch device according to a twenty-eighth embodiment of the present invention. 
         FIG. 40  is a schematic diagram illustrating a touch device according to a twenty-ninth embodiment of the present invention. 
         FIG. 41  is a schematic diagram illustrating a touch device according to a thirtieth embodiment of the present invention. 
         FIG. 42  is a schematic diagram illustrating a touch device according to a thirty-first embodiment of the present invention. 
     
    
    
     DETAILED DESCRIPTION 
     To provide a better understanding of the present invention to the skilled users in the technology of the present invention, preferred embodiments will be detailed as follows. The preferred embodiments of the present invention are illustrated in the accompanying drawings with numbered elements to elaborate the contents and effects to be achieved. 
       FIG. 1  is a schematic diagram illustrating a touch device according to a first embodiment of the present invention. Please note that the figures are only for illustration and the figures may not be to scale. The scale may be further modified according to different design considerations. As shown in  FIG. 1 , a touch device  100  is provided in the first preferred embodiment of the present invention. The touch device  100  includes a cover substrate  130 , a thin substrate  110 , a first adhesive layer  140 , a first touch sensing unit  120  and a first outer unit  150 . The thin substrate  110  is disposed opposite to the cover substrate  130 . The thin substrate  110  has a first surface  110 A and a second surface  110 B opposite to the first surface  110 A. The first surface  110 A faces the cover substrate  130 , and a thickness of the thin substrate  100  is thicker than or equal to 0.05 millimeter and thinner than or equal to 0.25 millimeter. The first adhesive layer  140  is disposed between the cover substrate  130  and the thin substrate  110 . The first touch sensing unit  120  is disposed on the thin substrate  110 . The first outer unit  150  is electrically connected to the first touch sensing unit  120 . In this embodiment, the first touch sensing unit  120  and at least a part of the first outer unit  150  are disposed on a side of the first surface  110 A, and a thickness of the first adhesive layer  140  is thicker than or equal to a thickness of the first outer unit  150  preferably, but not limited thereto. 
     In this embodiment, the thin substrate  110  may include a thin glass substrate, a thin plastic substrate, a thin glass-plastic composite substrate or other thin substrate made of appropriate materials. It is worth noting that the thin substrate  110  of the present invention is a thin glass substrate preferably so as to provide better process properties and light transmittance along with the thinner and lightweight properties, but not limited thereto. The thin substrate  110  may be flexible, and roll-to-roll process may be employed accordingly so as to enhance the application variety and the manufacturing convenience. Additionally, the cover substrate  130  may include a glass cover substrate, a plastic cover substrate or other cover substrates made of materials with high mechanical strength and used to protect, cover or decorate the corresponding device. The cover substrate  130  may be flat, curved or a combination of flat and curved structures, such as a 2.5D glass, but not limited thereto. The first adhesive layer  140  may include a liquid optical clear adhesive (LOCA), a solid optical clear adhesive (OCA), a pressure sensitive adhesive (PSA) or other appropriate adhesive materials. The first outer unit  150  may include a flexible printed circuit (FPC), an integrated circuit or other outer unit electrically connected to the first touch sensing unit  120 . The first touch sensing unit  120  in this embodiment may be made of a transparent conductive material, conductive mesh or other appropriate conductive materials. 
     Please refer to  FIGS. 1-5  for further descriptions of the first touch sensing unit  120 .  FIG. 2 ,  FIG. 3   FIG. 4  and  FIG. 5  are schematic diagrams illustrating different types of the first touch sensing unit in this embodiment. As shown in  FIG. 2 , the first touch sensing unit  120  in this embodiment may include a plurality of touch electrodes  120 S and a plurality of traces  120 C. Each of the traces  120 C is electrically connected to a corresponding touch electrode  120 S. The touch electrodes  120 S are disposed to be electrically isolated from one another so as to perform a self-capacitance touch sensing operation, but not limited thereto. The shape of each touch electrode  120 S may be a rectangle, a rhombus, a triangle or other appropriate geometrical patterns. Additionally, as shown in  FIG. 3 , the touch electrodes  120 S may include at least one touch signal driving electrode  120 T and at least one touch signal receiving electrode  120 R disposed to be separated from each other so as to perform a mutual-capacitance touch sensing operation, but not limited thereto. 
     As shown in  FIG. 4 , the first touch sensing unit  120  may also include a plurality of first axis electrodes  120 X and a plurality of second axis electrodes  120 Y. Each of the first axis electrodes  120 X extends along a first direction X, and each of the second axis electrodes  120 Y extends along a second direction Y. The first axis electrodes  120 X at least partially overlap the second axis electrodes  120 Y along a vertical projective direction Z perpendicular to the thin substrate  110 . The first axis electrodes  120 X are electrically isolated from the second axis electrodes  120 Y. The first direction X is substantially perpendicular to the second direction Y, but not limited thereto. The first axis electrode  120 X and the second axis electrode  120 Y may be a touch signal driving electrode or a touch signal receiving electrode respectively so as to perform a mutual-capacitance touch sensing operation, but not limited thereto. As shown in  FIG. 1  and  FIG. 4 , the touch device  100  may further include an insulation layer  125  disposed between the first axis electrode  120 X and the second axis electrode  120 Y so as to electrically isolate the first axis electrodes  120 X from the second axis electrodes  120 Y. The insulation layer  125  may include an organic insulation material or an inorganic insulation material. In this embodiment, a width of at least one of the first axis electrodes  120 X is wider than or equal to a width of each second axis electrode  120 Y, but the present invention is not limited to this. In other embodiments of the present invention, a width of at least one of the second axis electrodes  120 Y may also be wider than or equal to a width of each first axis electrode  120 X. For example, when the first axis electrode  120 X is a touch signal driving electrode and the second axis electrode  120 Y is a touch signal receiving electrode, the width of each first axis electrode  120 X is wider than or equal to the width of each second axis electrode  120 Y. Comparatively, when the second axis electrode  120 Y is a touch signal driving electrode and the first axis electrode  120 X is a touch signal receiving electrode, the width of each second axis electrode  120 Y is wider than or equal to the width of each first axis electrode  120 X. 
     As shown in  FIG. 5 , each of the first axis electrodes  120 X may include a plurality of first sub-electrodes X 1  and at least one first connecting line X 2  disposed between two adjacent first sub-electrodes X 1 , and the first connecting line X 2  is configured to electrically connect the two adjacent first sub-electrodes X 1 . Each of the second axis electrodes  120 Y may include a plurality of second sub-electrodes Y 1  and at least one second connecting line Y 2  disposed between two adjacent second sub-electrodes Y 1 , and the second connecting line Y 2  is configured to electrically connect the two adjacent second sub-electrodes Y 1 . As shown in  FIG. 1  and  FIG. 5 , the touch device  100  may further include at least one insulation block  125 P disposed between the first connecting line X 2  and the second connecting line Y 2  so as to electrically isolate the first axis electrodes  120 X from the second axis electrodes  120 Y, but not limited thereto. It is worth noting that the touch electrode  120 S, the trace  120 C, the first axis electrode  120 X, the second axis electrode  120 Y, the first sub-electrode X 1 , the first connecting line X 2 , the second sub-electrode Y 1  and the second connecting line Y 2  mentioned above may preferably be made of transparent materials, such as indium tin oxide (ITO), indium zinc oxide (IZO) and aluminum zinc oxide (AZO), metal materials or other appropriate conductive materials respectively. The metal materials mentioned above may include at least one of aluminum, copper, silver, chromium, titanium and molybdenum, a composite layer of the materials mentioned above, or an alloy of the materials mentioned above, but not limited thereto. The metal materials may present in a mesh configuration, for instance, a metal mesh. The conductive materials mentioned above may include conductive particles, carbon nanotubes or silver nanowires, but not limited thereto. The conductive materials may also present in a mesh configuration, for instance, a conductive mesh. Additionally, the first touch sensing unit  120  of the present invention is not limited to the different types shown in  FIGS. 2-5 . The first touch sensing unit  120  shown in  FIGS. 2-5  may also be applied to other embodiments of the present invention described below. 
     The following description will detail the different embodiments of the present invention. To simplify the description, identical components in each of the following embodiments are marked with identical symbols. For making it easier to understand the differences between the embodiments, the following description will detail the dissimilarities among different embodiments and the identical features will not be redundantly described. 
       FIG. 6  is a schematic diagram illustrating a touch device  200  according to a second embodiment of the present invention. As shown in  FIG. 6 , the difference between the touch device  200  and the touch device in the first embodiment is that the touch device  200  further includes a decoration layer  130 D disposed on the cover substrate  130 . The cover substrate  130  has a light-permeable region R 1  and a peripheral region R 2  disposed on at least one side of the light-permeable region R 1 , and the decoration layer  130 D is disposed in the peripheral region R 2  so as to present a decoration effect on a surface of the cover substrate  130  opposite to the decoration layer  130 D, but the present invention is not limited to this. For example, please refer to  FIG. 7 .  FIG. 7  is a schematic diagram illustrating a touch device  300  according to a third embodiment of the present invention. As shown in  FIG. 7 , the touch device  300  may further include a supporting substrate  131  and a decoration layer  130 D. The supporting substrate  131  is disposed on the cover substrate  130 . The decoration layer  130 D is disposed on the supporting substrate  131 , and the decoration layer  130 D is disposed correspondingly to the peripheral region R 2 . The decoration layer  130 D may be formed on the supporting substrate  131  before the supporting substrate  131  is attached to the cover substrate  130 . The decoration layer  130 D may be a black decoration layer or a color decoration layer. The decoration layer  130 D may be made of a photoresist material, a diamond-like material, a ceramic material or an ink material. The decoration layer  130 D may be a single layer structure or a multi-layered structure. For example, when the decoration layer  130 D is a color decoration layer, the decoration layer  130 D may be a single layer structure or a multi-layered structure made of color inks or photoresist. A shielding layer (not shown) or an anti-reflection layer (not shown) may be optionally disposed on the color inks or the color photoresist so as to increase the optical density of the decoration layer  130 D. The material of the shielding layer is not limited to inks. Translucent materials, low light-permeable materials, or light-impermeable materials capable of eliminating light leakage may be used to form the shielding layer. For example, the shielding layer may be made of a photoresist material, a diamond-like material or a ceramic material. In addition, the shielding layer may also be made of an infrared permeable material. In other words, the decoration layer  130 D may be a single layer structure or a multiple layered structure of photoresist materials, diamond-like materials, ceramic materials, ink materials or other appropriate black or non-black decoration materials. 
       FIG. 8  is a schematic diagram illustrating a touch device  400  according to a fourth embodiment of the present invention. As shown in  FIG. 8 , the difference between the touch device  400  and the touch device in the second embodiment is that the touch device  400  further includes a display device  190  disposed on a side of the second surface  110 B of the thin substrate  110 . Additionally, the first outer unit  150  in this embodiment may include a first connection end  150 A and a second connection end  150 B. The first connection end  150 A is disposed on the first surface  110 A of the thin substrate  110  so as to be electrically connected to the first touch sensing unit  120 . The second connection end  150 B is electrically connected to the display device  190 . In other words, the display device  190  and the first touch sensing unit  120  in this embodiment may be electrically connected to the same first outer unit  150  so as to be integrated structurally, but not limited thereto. The display device  190  may include a liquid crystal display device, an organic light emitting diode (OLED) display device, an electro-wetting display device, an e-ink display device, a plasma display device, a field emission display (FED) device or other appropriate display devices. The touch device  400  in this embodiment may be regarded as an out-cell type touch display device accordingly. 
       FIG. 9  is a schematic diagram illustrating a touch device  500  according to a fifth embodiment of the present invention. As shown in  FIG. 9 , the difference between the touch device  500  and the touch device in the second embodiment is that, in the touch device  500 , the first touch sensing unit  120  and at least a part of the first outer unit  150  are disposed on a side of the second surface  110 B of the thin substrate  110 . Because the first outer unit  150  and the first adhesive layer  140  in this embodiment are disposed on different sides of the thin substrate  110  respectively, the thickness of the first adhesive layer  140  may not be constrained by the first outer unit  150 . The thickness of the first adhesive layer  140  may be reduced to decrease the total thickness of the touch device  500 , and the touch device  500  may become thinner accordingly. In other words, the thickness of the first adhesive layer  140  may be thinner than the thickness of the first outer unit  150  preferably, but not limited thereto. 
       FIG. 10  is a schematic diagram illustrating a touch device  600  according to a sixth embodiment of the present invention. As shown in  FIG. 10 , the difference between the touch device  600  and the touch device in the fifth embodiment is that the touch device  600  further includes the display device  190  disposed on a side of the second surface  110 B of the thin substrate  110 . Additionally, the first outer unit  150  in this embodiment may include a first connection end  150 A and a second connection end  150 B. The first connection end  150 A is disposed on the second surface  110 B of the thin substrate  110  so as to be electrically connected to the first touch sensing unit  120 . The second connection end  150 B is electrically connected to the display device  190 . In other words, the display device  190  and the first touch sensing unit  120  in this embodiment may be electrically connected to the same first outer unit  150  so as to be integrated structurally, but not limited thereto. 
       FIG. 11  is a schematic diagram illustrating a touch device  700  according to a seventh embodiment of the present invention. As shown in  FIG. 11 , the difference between the touch device  700  and the touch device in the fourth embodiment is that the thin substrate  110  in this embodiment includes a substrate of a display device. The substrate of the display device may include a color filter substrate, an array substrate, an encapsulating substrate of an organic light emitting display device or other substrates used in display devices. A display lower substrate  791 , a display medium  792  and the thin substrate  110  of this embodiment may be used to form a display device  790 . The display lower substrate  791  and the display medium  792  are disposed on a side of the second surface  110 B of the thin substrate  110 . In other words, the first touch sensing unit  120  in this embodiment is disposed on the thin substrate  110  of the display device  790 , and the touch device  700  may be regarded as an on-cell type touch display device, but not limited thereto. It is worth noting that the second connection end  150 B of the first outer unit  150  in this embodiment may be disposed on the display lower substrate  791  so as to be electrically connected to a driving unit, such as a thin film transistor array, in the display device  790 , but not limited thereto. The display medium  792  is disposed between the thin substrate  110  and the display lower substrate  791 . According to different types of the display devices, the display medium  792  may include a liquid crystal material, an organic light emitting material, an electro-wetting display material, an e-ink material, a plasma material or other materials for generating display effects. 
       FIG. 12  is a schematic diagram illustrating a touch device  800  according to an eighth embodiment of the present invention. As shown in  FIG. 12 , the difference between the touch device  800  and the touch device in the seventh embodiment is that the first touch sensing unit  120  in this embodiment is disposed on the second surface  110 B of the thin substrate  110 . The first outer unit  150  is at least partially disposed on the display lower substrate  791  preferably. The first outer unit  150  may be electrically connected to the first touch sensing unit  120  disposed on the thin substrate  110  via a conductive unit (not shown), such as Au balls, an anisotropic conductive film (ACF) or a silver paste, disposed between the thin substrate  110  and the display lower substrate  791 , but not limited thereto. The touch device  800  in this embodiment may be regarded as an in-cell type touch display device accordingly. The touch device  800  may further become thinner because the thin substrate  110  and the first touch sensing unit  120  are disposed by an in-cell approach. 
       FIG. 13  is a schematic diagram illustrating a touch device  900  according to a ninth embodiment of the present invention. As shown in  FIG. 13 , the difference between the touch device  900  and the touch device in the first embodiment is that the touch device  900  further includes a conductive protection line PT disposed on the cover substrate  130 . The conductive protection line PT may be a ground wire, an electrically floating line or a line electrically coupled to a voltage source. The conductive protection line PT may surround the first touch sensing unit  120  preferably so as to generate a protection effect, but not limited thereto. Additionally, the first outer unit  150  in this embodiment may further include a third connection end  150 C disposed on the cover substrate  130 . The first outer unit  150  is electrically connected to the conductive protection line PT via the third connection end  150 C. In other words, the first outer unit  150  may be shared by the first touch sensing unit  120  disposed on the thin substrate  110  and the conductive protection line PT disposed on the cover substrate  130  so as to simplify the structure of the touch device  900 , but not limited thereto. It is worth noting that the conductive protection line PT and the allocation of the third connection end  150 C of the first outer unit  150  in this embodiment may also be applied to other embodiment of the present invention. 
       FIG. 14  is a schematic diagram illustrating a touch device  301  according to a tenth embodiment of the present invention. As shown in  FIG. 14 , the difference between the touch device  301  and the touch device in the third embodiment is that the supporting substrate  131  in this embodiment is disposed on a side of the cover substrate  130  facing the thin substrate  110 . The decoration layer  130 D is disposed on the supporting substrate  131 , the decoration layer  130 D is disposed correspondingly to the peripheral region R 2 , and the decoration layer  130 D is disposed between the supporting substrate  131  and the cover substrate  130  preferably, but not limited thereto. 
       FIG. 15  is a schematic diagram illustrating a touch device  901  according to an eleventh embodiment of the present invention. As shown in  FIG. 15 , the difference between the touch device  901  and the touch device in the ninth embodiment is that the touch device  901  further includes a second outer unit  151 . The second outer unit  151  is electrically connected to the conductive protection line PT. In other words, signals may be transmitted to and/or from the first touch sensing unit  120  disposed on the thin substrate  110  and the conductive protection line PT disposed on the cover substrate  130  respectively via different outer units. The second outer unit  151  may include a flexible printed circuit, an integrated circuit or other outer unit electrically connected to the conductive protection line PT. 
       FIG. 16  is a schematic diagram illustrating a touch device  201  according to a twelfth embodiment of the present invention. As shown in  FIG. 16 , the difference between the touch device  201  and the touch device in the second embodiment is that the touch device  201  further includes a second touch sensing unit  160  disposed on the cover substrate  130 . The second touch sensing unit  160  may be disposed on the peripheral region R 2  of the cover substrate  130  so as to perform a hovering touch operation, or according to function requirement of the touch device  201 , the second touch sensing unit  160  may also be disposed correspondingly to specific patterns or letter areas in the decoration layer  130 D within the peripheral region R 2  so as to perform touch effects corresponding to the patterns and the letters, but not limited thereto. Additionally, the first outer unit  150  in this embodiment may further include a fourth connection end  150 D disposed on the cover substrate  130 , and the first outer unit  150  is electrically connected to the second touch sensing unit  160  via the fourth connection end  150 D. In other words, the first outer unit  150  may be shared by the first touch sensing unit  120  disposed on the thin substrate  110  and the second touch sensing unit  160  disposed on the cover substrate  130  so as to simplify the structure of the touch device  201 , but not limited thereto. It is worth noting that the second touch sensing unit  160  and the allocation of the fourth connection end  150 D of the first outer unit  150  in this embodiment may also be applied to other embodiment of the present invention. 
       FIG. 17  is a schematic diagram illustrating a touch device  202  according to a thirteen embodiment of the present invention. As shown in  FIG. 17 , the difference between the touch device  202  and the touch device in the thirteenth embodiment is that the touch device  202  further includes a third outer unit  152 . The third outer unit  152  is electrically connected to the second touch sensing unit  160 . The third outer unit  152  may include a flexible printed circuit, an integrated circuit or other outer unit electrically connected to the second touch sensing unit  160 . In other words, signals may be transmitted to and/or from the first touch sensing unit  120  disposed on the thin substrate  110  and the second touch sensing unit  160  disposed on the cover substrate  130  respectively via different outer units. 
       FIG. 18  is a schematic diagram illustrating a touch device  203  according to a fourteenth embodiment of the present invention. As shown in  FIG. 18 , the difference between the touch device  203  and the touch device in the first embodiment is that the first axis electrodes  120 X are disposed on the first surface  110 A of the thin substrate  110 , and the second axis electrodes  120 Y in this embodiment are disposed on the second surface  110 B of the thin substrate  110 . In other words, the second axis electrode  120 Y and the first axis electrode  120 X are disposed on different two sides of the thin substrate  110 . The first axis electrode  120 X and the second axis electrode  120 Y may be a touch signal driving electrode or a touch signal receiving electrode respectively so as to perform a mutual-capacitance touch sensing operation, but not limited thereto. Additionally, the first outer unit  150  in this embodiment may include a first connection end  150 A and a fifth connection end  150 E. The first connection end  150 A is disposed on the first surface  110 A of the thin substrate  110  so as to be electrically connected to the first axis electrodes  120 X, and the fifth connection end  150 E is disposed on the second surface  110 B of the thin substrate  110  so as to be electrically connected to the second axis electrodes  120 Y. It is worth noting that, in this embodiment, the second axis electrodes  120 Y are touch signal driving electrodes preferably, and the first axis electrodes  120 X are touch signal receiving electrodes preferably. The width of each second axis electrode  120 Y is wider than or equal to the width of each first axis electrode  120 X preferably. In other words, a covering area of the second axis electrodes  120 Y on the thin substrate  110  is larger than or equal to a covering area of the first axis electrodes  120 X on the thin substrate  110  preferably. In addition, the second axis electrodes  120 Y in this embodiment may also be an interference shielding layer configured to isolate the touch device from interference of other outer signals, but not limited thereto. 
       FIG. 19  is a schematic diagram illustrating a touch device  101  according to a fifteenth embodiment of the present invention. As shown in  FIG. 19 , the difference between the touch device  101  and the touch device in the first embodiment is that the touch device  101  further includes a protection layer  180  disposed on at least one peripheral side E of the cover substrate  130 . The protection layer  180  may be disposed on the surrounding peripheral side of the cover substrate  130  so as to form a required protection effect, but the present invention is not limited to this. In other words, the protection layer  180  may surround all of the peripheral side of the cover substrate  130  or be disposed on a part of the peripheral side E. The protection layer  180  may be formed by dispensing, spray coating, immersing or other appropriate processes. The protection layer  180  may include a protection coating layer or a protection coating glue, but not limited thereto. The protection layer  180  in this embodiment may also be selectively disposed in the embodiments described above according to other design considerations. For example, the protection layer  180  may be disposed corresponding to the decoration layer in the embodiments mentioned above, and the protection layer  180  may partially overlap the decoration layer, but not limited thereto. 
       FIG. 20  is a schematic diagram illustrating a touch device  1001  according to a sixteenth embodiment of the present invention. As shown in  FIG. 20 , the difference between the touch device  1001  and the touch device in the second embodiment is that the cover substrate  130  in this embodiment has a peripheral side E, a third surface  130 A and a fourth surface  130 B opposite to the third surface  130 A. The fourth surface  130 B faces the thin substrate  110 , and the decoration layer  130 D at least partially covers the fourth surface  130 B. In this embodiment, the decoration layer  130 D may further partially cover the peripheral side E, but not limited thereto. Specifically, the peripheral side E of the cover substrate  130  in this embodiment may be composed of a first flat surface E 1 , a first oblique surface E 2  and a second oblique surface E 3 . The first oblique surface E 2  is connected to the third surface  130 A, the second oblique surface E 3  is connected to the fourth surface  130 B, and the first flat surface E 1  is disposed between the first oblique surface E 2  and the second oblique surface E 3 . The condition of the peripheral side E in this embodiment may be regarded as a so-called “C angle”, but not limited thereto. In this embodiment, the decoration layer  130 D may partially cover the second oblique surface E 3  so as to ensure the decoration effect on the edge of the cover substrate  130 , but not limited thereto. Additionally, the touch device  1001  may further include a light-shielding layer  130 S disposed on the decoration layer  130 D. The shielding layer  130 S may include a dark ink layer, a color photoresist layer or a reflection layer so as to be collocated with the decoration layer  130 D for generating the required decoration effects. The reflection layer mentioned above may include an ink mirror, a metal material or other appropriate reflective materials. It is worth noting that the light-shielding layer in this embodiment may also be applied to other embodiments mentioned above or being described below according to other design considerations. 
       FIG. 21  is a schematic diagram illustrating a touch device  1002  according to a seventeenth embodiment of the present invention.  FIG. 22 ,  FIG. 23 ,  FIG. 24 ,  FIG. 25 ,  FIG. 26 ,  FIG. 27  and  FIG. 28  are schematic diagrams illustrating allocation conditions of a cover substrate and a protection layer according to the seventeenth embodiment of the present invention. As shown in  FIG. 21 , the difference between the touch device  1002  and the touch device in the sixteenth embodiment is that the touch device  1002  further includes a protection layer  180  disposed on the peripheral side E of the cover substrate  130 , and the protection layer  180  at least partially covers the first flat surface E 1 , the first oblique surface E 2  or/and the second oblique surface E 3 . Specifically, as shown in  FIG. 21 , the protection layer  180  may only cover the first flat surface E 1 ; as shown in  FIG. 22 , the protection layer  180  may completely cover the peripheral side E; as shown in  FIG. 23 , the protection layer  180  may only cover the first flat surface E 1  and the second oblique surface E 3  without covering the first oblique surface E 2 ; as shown in  FIG. 24 , the protection layer  180  may only cover the first flat surface E 1  and the first oblique surface E 2  without covering the second oblique surface E 3 . In addition, as shown in  FIG. 25 , the peripheral side E may also be a curved surface, and the curved peripheral side E may be regarded as a so-called “R angle”, but not limited thereto. As shown in  FIG. 25 , the protection layer  180  may completely cover the peripheral side E which is a curved surface. As shown in  FIG. 26 , the protection layer  180  may only cover a center part of the peripheral side E which is a curved surface.  FIG. 27 , the protection layer  180  may only cover the center part of the peripheral side E and a region adjacent to the fourth surface  130 B.  FIG. 28 , the protection layer  180  may only cover the center part of the peripheral side E and a region adjacent to the third surface  130 A. 
       FIG. 29  is a schematic diagram illustrating a touch device  1003  according to an eighteenth embodiment of the present invention. As shown in  FIG. 29 , the difference between the touch device  1003  and the touch device in the seventeenth embodiment is that the protection layer  180  in this embodiment at least partially disposed between the decoration layer  130 D and the cover substrate  130 . In other words, the protection layer  180  may be formed on the cover substrate  130  and cover the peripheral side E before the process of forming the decoration layer  130 D so as to ensure the mechanical strength of the cover substrate  130  during the manufacturing process of the decoration layer  130 D and the decoration effects on the edge region of the cover substrate  130 . 
       FIG. 30  is a schematic diagram illustrating a touch device  1004  according to a nineteenth embodiment of the present invention. As shown in  FIG. 30 , the difference between the touch device  1004  and the touch device in the eighteenth embodiment is that the protection layer  180  in this embodiment at least partially covers the decoration layer  130 D, and the decoration layer  130 D is partially disposed between the protection layer  180  and the cover substrate  130  preferably. In other words, the decoration layer  130 D may be formed on the cover substrate  130  and cover the peripheral side E before the process of forming the protection layer  180  so as to ensure the decoration effects on the edge region of the cover substrate  130 . 
       FIG. 31  is a schematic diagram illustrating a touch device  1005  according to a twentieth embodiment of the present invention. As shown in  FIG. 31 , the difference between the touch device  1005  and the touch device in the seventh embodiment is that the touch device  1005  further includes a shielding structure  135  disposed on the cover substrate  130  and at least partially covering the decoration layer  130 D. The shielding structure  135  may be made of a translucent material, low light-permeable material, a light-impermeable material or an infrared permeable material so as to improve light leakage issues on the edges. For example, the shielding structure  135  may include a single layer structure or a multiple layered structure of a photoresist material, a diamond-like material, a ceramic material, an ink material or other appropriate shielding materials. Additionally, the protection layer  180  in this embodiment is at least partially disposed between the shielding structure  135  and the cover substrate  130 , and the shielding structure  135  at least partially covers the protection layer  180 . In other words, the protection layer  180  in this embodiment may be formed on the cover substrate  130  and cover the peripheral side E before the process of forming the shielding structure  135  so as to ensure the mechanical strength of the cover substrate  130  during the manufacturing process of the shielding structure  135  and the decoration effects on the edge region of the cover substrate  130 . 
       FIG. 32  is a schematic diagram illustrating a touch device  1006  according to a twenty-first embodiment of the present invention. As shown in  FIG. 32 , the difference between the touch device  1006  and the touch device in the twentieth embodiment is that the protection layer  180  in this embodiment at least partially covers the shielding structure  135 , and the shielding structure  135  is partially disposed between the protection layer  180  and the cover substrate  130  preferably. In other words, the shielding structure  135  in this embodiment may be formed on the cover substrate  130  and partially cover the peripheral side E before the process of forming the protection layer  180  so as to ensure the decoration effects on the edge region of the cover substrate  130 . 
       FIG. 33  is a schematic diagram illustrating a touch device  1007  according to a twenty-second embodiment of the present invention. As shown in  FIG. 33 , the difference between the touch device  1007  and the touch device in the sixteenth embodiment is that the third surface  130 A of the cover substrate  130  may include a second flat surface S 1  and a first curved surface S 2 , and the fourth surface  130 B is a flat surface. The cover substrate  130  in this embodiment may be regarded as a so-called “2.25D substrate”, but not limited thereto. 
       FIG. 34  is a schematic diagram illustrating a touch device  1008  according to a twenty-third embodiment of the present invention. As shown in  FIG. 34 , the difference between the touch device  1008  and the touch device in the sixteenth embodiment is that the third surface  130 A of the cover substrate  130  in this embodiment is a curved surface, and the fourth surface  130 B is a flat surface. The cover substrate  130  in this embodiment may be regarded as a so-called “2.5D substrate”, but not limited thereto. 
       FIG. 35  is a schematic diagram illustrating a touch device  1009  according to a twenty-fourth embodiment of the present invention. As shown in  FIG. 35 , the difference between the touch device  1009  and the touch device in the sixteenth embodiment is that the third surface  130 A of the cover substrate  130  in this embodiment may be a curved surface, and the fourth surface  130 B may be another curved surface. The cover substrate  130  in this embodiment may be regarded as a so-called “3D substrate”, but not limited thereto. It is worth noting that the 2.25D cover substrate, the 2.5D cover substrate and the 3D cover substrate mentioned above may also be applied to other embodiments mentioned above or being described below according to other design considerations. 
       FIG. 36  is a schematic diagram illustrating a touch device  1010  according to a twenty-fifth embodiment of the present invention. As shown in  FIG. 36 , the difference between the touch device  1010  and the touch device in the seventeenth embodiment is that the touch device  1010  further includes a first substrate  111 , a second adhesive layer  141  and a conductive layer  170 . The first substrate  111  is disposed on a side of the second surface  110 B of the thin substrate  110 . The first substrate  111  has a fifth surface  111 A and a sixth surface  111 B opposite to the fifth surface  111 A, and the fifth surface  111 A faces the thin substrate  110 . In this embodiment, the thin substrate  110  is disposed between the cover substrate  130  and the first substrate  111 . The second adhesive layer  141  is disposed between the first substrate  111  and the thin substrate  110  so as to combine the first substrate  111  and the thin substrate  110 . The conductive layer  170  is disposed on the first substrate  111 . In other words, the conductive layer  170  may be formed on the first substrate  111  before the first substrate  111  is adhered to the thin substrate  110  via the second adhesive layer  141  for forming a dual side electrode structure. The material properties of the second adhesive layer  141  is similar to those of the first adhesive layer  140  mentioned above and will not be redundantly described. 
     It is worth noting that the conductive layer  170  may be collocated with the first touch sensing unit  120  for performing touch sensing operations, or the conductive layer  170  and the first touch sensing unit  120  may be used to perform different and independent touch sensing operations respectively. For example, the first touch sensing unit  120  may include the second axis electrodes  120 Y described above, and the conductive layer  170  may include a plurality of third axis electrodes  170 X crossing the second axis electrodes  120 Y and electrically isolated from the second axis electrodes  120 Y. Each of the third axis electrodes  170 X extends along the first direction X. The allocation of the third axis electrodes  170 X is similar to that of the first axis electrodes  120 X shown in  FIG. 4 . The third axis electrodes  170  may be collocated with the second axis electrodes  120 Y so as to perform a touch sensing &amp; positioning function, but not limited thereto. In addition, because the conductive layer  170  is disposed on the lower part of the touch device and relatively closer to a display device (not shown), the conductive layer  170  may also be used to reduce signal interference from the display device disposed below, but not limited thereto. Accordingly, a width of the third axis electrode  170 X may be wider than or equal to a width of each second axis electrode  120 Y when the conductive layer  170  is used as a touch signal driving electrode and the first touch sensing unit  120  is used as a touch signal receiving electrode, or a covering area of the third axis electrodes  170 X corresponding to the first substrate  111  may be larger than or equal to a covering area of the second axis electrodes  120 Y corresponding to the first substrate  111 , but not limited thereto. In addition, apart from being collocated with the first touch sensing unit  120  for touch sensing operations, the conductive layer  170  may also be a conductive film layer used as an interference shielding layer configured to isolate signal interference from other devices, such as signal interference from a display device. The conductive layer  170  may be a transparent conductive layer or a mesh conductive layer. Additionally, a low resistance material layer (not shown in  FIG. 36 ), which is electrically connected to a grounding end, may be disposed on at least one side of the periphery of the conductive layer  170  and disposed correspondingly to the decoration layer  130 D preferably so as to assist in passing the outer interference signal toward the grounding end. The interference signals may flow rapidly to the grounding end because the resistance of the low resistance material layer is lower than that of the conductive layer  170 . The low resistance material layer is disposed to surround the periphery of the conductive layer  170  preferably, and a sheet resistance of the low resistance material layer is lower than 30Ω/□ preferably. The material of the low resistance material layer may include at least one of aluminum, copper, silver, chromium, titanium, and molybdenum, a composite layer of the materials mentioned above or an alloy of the materials mentioned above, but not limited thereto. Additionally, the conductive layer  170  in this embodiment is disposed on the fifth surface  111 A of the first substrate  111 , and the first touch sensing unit  120  is disposed on the first surface  110 A of the thin substrate  110 , but the present invention is not limited to this. In other embodiments of the present invention, the first touch sensing unit  120  and the conductive layer  170  may also be disposed on different surfaces of the thin substrate  110  and the first substrate  111  respectively so as to perform the required touch sensing functions. It is worth noting that the first substrate  111  may include a thin film layer, a thin substrate, a substrate having normal thickness (about 0.3 mm to 0.7 mm) or a substrate of a display device. The thin film layer mentioned above may include a polyimide (PI) film or a photoresist film, a thin substrate. The thin substrate mentioned above may include a thin glass substrate, a thin plastic substrate, a thin glass-plastic composite substrate or other thin substrate made of appropriate materials. The substrate having normal thickness mentioned above may include a glass substrate, a ceramic substrate or a plastic substrate. Additionally, the touch device  1010  in this embodiment may further include a fourth outer unit  153  electrically connected to the conductive layer  170 . The fourth outer unit  153  may include a flexible printed circuit, an integrated circuit or other outer unit electrically connected to the conductive layer  170 . The fourth outer unit  153  may also be integrated with the first outer unit  150  to be a single outer unit, but not limited thereto. 
       FIG. 37  is a schematic diagram illustrating a touch device  1011  according to a twenty-sixth embodiment of the present invention. As shown in  FIG. 37 , the difference between the touch device  1011  and the touch device in the twenty-fifth embodiment is that the first touch sensing unit  120  and the first outer unit  150  in this embodiment are disposed on a side of the second surface  110 B of the thin substrate  110 . In other words, the first touch sensing unit  120  is disposed to face the conductive layer  170 . 
       FIG. 38  is a schematic diagram illustrating a touch device  1012  according to a twenty-seventh embodiment of the present invention. As shown in  FIG. 38 , the difference between the touch device  1012  and the touch device in the twenty-fifth embodiment is that the first substrate  111  in this embodiment is a substrate of a display device  191 . The display device  191  may include a liquid crystal display device, an organic light emitting diode display device, an electro-wetting display device, an e-ink display device, a plasma display device, a field emission display device or other appropriate display devices. The conductive layer  170  may be disposed on the fifth surface  111 A of the first substrate  111  so as to form an on-cell type touch display device, but the present invention is not limited to this. In other embodiments of the present invention, the conductive layer  170  may also be disposed on the sixth surface  111 B of the first substrate  111  and disposed in the display device  191  so as to form an in-cell type touch display device. 
       FIG. 39  is a schematic diagram illustrating a touch device  1013  according to a twenty-eighth embodiment of the present invention. As shown in  FIG. 39 , the difference between the touch device  1013  and the touch device in the sixteenth embodiment is that the thin substrate  110  in this embodiment further has a break cutting line  110 C on a side of the first surface  110 A. The break cutting line  110 C is a structure formed during the process of forming the thin substrate  110  by cutting with a cutter wheel. In this embodiment, the break cutting line  110 C is not disposed to be exposed at the outer side of the touch device  1013 . The first surface  110 A with the break cutting line  110 C is disposed to face up and face the cover substrate  130 , and the second surface  110 B without the break cutting line is disposed to face down. The second surface  110 B is smoother than the first surface  110 A, and the pressure resistance of the second surface  110 B is relatively high. Accordingly, the second surface  110 B will not be broken or damaged easily under the condition of applying force and deformation. The first touch sensing unit  120  in this embodiment is disposed on the first surface  110 A. In other words, the first touch sensing unit  120  may be disposed closer to a side of the break cutting line  110 C, but not limited thereto. The first touch sensing unit  120  may also be disposed on the second surface  110 B or be disposed on the first surface  110 A and the second surface  110 B. 
       FIG. 40  is a schematic diagram illustrating a touch device  1014  according to a twenty-ninth embodiment of the present invention. As shown in  FIG. 40 , the difference between the touch device  1014  and the touch device in the twenty-eighth embodiment is that the break cutting line  110 C is disposed on a side of the second surface  110 B. 
       FIG. 41  is a schematic diagram illustrating a touch device  1015  according to a thirtieth embodiment of the present invention. As shown in  FIG. 41 , the difference between the touch device  1015  and the touch device in the twenty-ninth embodiment is that the touch device  1015  further includes a conductive layer  170  disposed on the second surface  110 B of the thin substrate  110 . The conductive layer  170  is disposed on a lower part of the touch device  1015  and disposed closer to the display device (not shown). Signals from the display device may interfere with the sensing operation of the touch device  1015 , and the conductive layer  170  may be an interference shielding layer configured to isolate the touch device from interference of the display device. The conductive layer  170  may be a transparent conductive layer or a mesh conductive layer. Additionally, a low resistance material layer  175 , which is electrically connected to a grounding end preferably, may be disposed on at least one side of the periphery of the conductive layer  170  and disposed correspondingly to the decoration layer  130 D preferably so as to assist in passing the outer interference signal toward the grounding end. The interference signals may flow rapidly to the grounding end because the resistance of the low resistance material layer  175  is lower than that of the conductive layer  170 . The low resistance material layer  175  is disposed to surround the periphery of the conductive layer  170  preferably, and a sheet resistance of the low resistance material layer  175  is lower than 30Ω/□ preferably. The material of the low resistance material layer  175  may include at least one of aluminum, copper, silver, chromium, titanium, and molybdenum, a composite layer of the materials mentioned above or an alloy of the materials mentioned above, but not limited thereto. 
       FIG. 42  is a schematic diagram illustrating a touch device  1016  according to a thirty-first embodiment of the present invention. As shown in  FIG. 42 , the difference between the touch device  1016  and the touch device in the twenty-fifth embodiment is that the conductive layer  170  is only an interference shielding layer configured to isolate the touch device from interference of the outer signals. Additionally, the touch device  1016  may further include a low resistance material layer  175 , which is electrically connected to a grounding end preferably, disposed on at least one side of the periphery of the conductive layer  170  and disposed correspondingly to the decoration layer  130 D preferably so as to assist in passing the outer interference signal toward the grounding end. The interference signals may flow rapidly to the grounding end because the resistance of the low resistance material layer  175  is lower than that of the conductive layer  170 . The low resistance material layer  175  is disposed to surround the periphery of the conductive layer  170  preferably, and a sheet resistance of the low resistance material layer  175  is lower than 30Ω/□ preferably. The material of the low resistance material layer  175  may include at least one of aluminum, copper, silver, chromium, titanium, and molybdenum, a composite layer of the materials mentioned above or an alloy of the materials mentioned above, but not limited thereto. It is worth noting that the conductive layer  170  and the low resistance material layer  175  may also be modified to be disposed on a side of the sixth surface  111 B of the first substrate  111  so as to generate required interference shielding effect. 
     The thin substrate in the above mentioned embodiments may be flexible and include a thin glass substrate, a thin plastic substrate or a thin glass-plastic composite substrate with thickness thicker than or equal to 0.05 mm and thinner than or equal to 0.25 mm. In addition, the cover substrate may include glass cover substrate (such as a tempered glass), a plastic cover substrate or other cover substrates made of materials with high mechanical strength and used to protect, cover or decorate the corresponding device. The shape of the cover substrate may be flat, curved or the combination thereof, such as a 2.5D glass, but not limited thereto. A protection layer, such as a light-cured adhesive, may be spread or coated on the peripheral sides of the cover substrate may be covered so as to enhance the mechanical strength of the cover substrate and resist damages from outside force. A decoration layer may be further disposed on the cover substrate, and the decoration layer may be disposed in the peripheral region. The decoration layer may be a black decoration layer or a color decoration layer so as to present decoration effects on the cover substrate. The first adhesive layer may include a liquid optical clear adhesive (LOCA), a solid optical clear adhesive (OCA), a pressure sensitive adhesive (PSA) or other appropriate adhesive materials. The first outer unit, the second outer unit and the third outer unit may include a flexible printed circuit (FPC), an integrated circuit or other outer unit electrically connected to the touch sensing unit respectively. The first touch sensing unit and the second touch sensing unit may be formed by a transparent conductive material, a conductive mesh or other appropriate conductive materials. 
     It is worth noting that the descriptions about disposing on the surface of the substrate are not limited to the condition of directly contacting the surface of the substrate. 
     To summarize the above descriptions, in the touch device of the present invention, the touch sensing unit is disposed on the thin substrate having a thickness thicker than or equal to 0.05 millimeter and thinner than or equal to 0.25 millimeter so as achieve the purposes of lightweight and thinner designs. Additionally, the thin substrate in the present invention may also be used as a substrate of the display device, and the touch sensing unit may be disposed on the thin substrate of the display device for forming a thin integrated touch display device. 
     Those skilled in the art will readily observe that numerous modifications and alterations of the device and method may be made while retaining the teachings of the invention. Accordingly, the above disclosure should be construed as limited only by the metes and bounds of the appended claims.