Patent Publication Number: US-2015070794-A1

Title: Touch panel and decoration panel thereof

Description:
BACKGROUND OF THE INVENTION 
     1. Field of the Invention 
     The present invention generally relates to a touch panel and a decoration panel thereof, and more particularly, to a touch panel including an opaque reflection layer disposed in a decoration region and a decoration panel thereof. 
     2. Description of the Prior Art 
     Please refer to  FIG. 1 .  FIG. 1  is a schematic diagram illustrating a conventional touch panel  100 . As shown in  FIG. 1 , the conventional touch panel  100  includes a cover glass  110 . A plurality of color ink layers  120  and a conductive line  130  are orderly stacked on an inner surface  110 B of the cover glass  110  within a peripheral region BA. A touch sensing unit  130 S is disposed in a touch sensing region AA, and the touch sensing unit  130 S is electrically connected to the conductive line  130  in the peripheral region BA. The color ink layers  120  are used to form color mixing effects at the peripheral region BA of the touch panel  100  and present required color from a side of an outer surface  110 A of the cover glass  110 . However, a light shielding performance of one single color ink layer  120  is generally insufficient, especially when the color ink layer  120  is not a black ink layer, and the total thickness of the color ink layers  120  has to be thick enough for providing required light shielding performance. Generally, the total thickness of the stacked color ink layers  120  has to be thicker than 10 micrometers so as to generate sufficient light shielding result. However, the touch sensing unit  130 S or/and the conductive line  130  may crack at the edge of the stacked color ink layers  120  during the manufacturing processes because the total thickness of the color ink layers  120  is too thick or the edge of the stacked color ink layers  120  is too uneven, and problems related to reliability may occur accordingly. 
     SUMMARY OF THE INVENTION 
     It is one of the objectives of the present invention to provide a touch panel. An opaque reflection layer is disposed in the decoration region so as to make a collocated decoration layer thinner and enhance a presented color purity of the decoration layer. 
     To achieve the purposes described above, a preferred embodiment of the present invention provides a touch panel. The touch panel has a transparent region and a decoration region disposed on at least one side of the transparent region. The touch panel includes a first substrate, a first decoration layer, a touch sensing unit, a first conductive line and a first opaque reflection layer. The first decoration layer is disposed on the first substrate and in the decoration region. The touch sensing unit is at least disposed in the transparent region. The first conductive line is disposed in the decoration region. The first conductive line is electrically connected to the touch sensing unit. The first opaque reflection layer is disposed on the first decoration layer and in the decoration region. The first decoration layer is disposed between the first substrate and the first opaque reflection layer. 
     To achieve the purposes described above, a preferred embodiment of the present invention provides decoration panel of a touch panel. The decoration panel has a transparent region and a decoration region disposed on at least one side of the transparent region. The decoration panel includes a first substrate, a first decoration layer and a first opaque reflection layer. The first decoration layer is disposed on the first substrate and in the decoration region. The first opaque reflection layer is disposed on the first decoration layer and in the decoration region. The first decoration layer is disposed between the first substrate and the first opaque reflection layer. 
     In the present invention, the opaque reflection layer disposed in the decoration region may be used to enhance a presented color purity of the decoration layer. Additionally, the opaque reflection layer may be used to make the collocated decoration layer thinner, the crack issues of the subsequently formed conductive lines and touch sensing units on the decoration layer may become minor, and the reliability may be enhanced because the terrain formed by the decoration layer become relatively smooth. The related manufacturing yield may also be improved 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 conventional touch panel. 
         FIG. 2  is a schematic diagram illustrating a touch panel according to a first preferred embodiment of the present invention. 
         FIG. 3  is a schematic cross-sectional diagram taken along a line A-A′ in  FIG. 2 . 
         FIG. 4  is a schematic diagram illustrating a touch panel according to a second preferred embodiment of the present invention. 
         FIG. 5  is a schematic diagram illustrating a touch panel according to a third preferred embodiment of the present invention. 
         FIG. 6  is a schematic diagram illustrating a touch panel according to a fourth preferred embodiment of the present invention. 
         FIG. 7  is a schematic diagram illustrating a touch panel according to a fifth preferred embodiment of the present invention. 
         FIG. 8  is a schematic diagram illustrating a touch panel according to a sixth preferred embodiment of the present invention. 
         FIG. 9  is a schematic diagram illustrating a touch panel according to a seventh preferred embodiment of the present invention. 
         FIG. 10  is a schematic diagram illustrating a touch panel according to an eighth preferred embodiment of the present invention. 
         FIG. 11  is a schematic diagram illustrating a touch panel according to a ninth preferred embodiment of the present invention. 
         FIG. 12  is a schematic diagram illustrating a touch panel according to a tenth preferred embodiment of the present invention. 
         FIG. 13  is a schematic diagram illustrating a touch panel according to an eleventh preferred embodiment of the present invention. 
         FIG. 14  is a schematic diagram illustrating a touch panel according to a twelfth preferred 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. 
     Please refer to  FIG. 2  and  FIG. 3 .  FIG. 2  is a schematic diagram illustrating a touch panel according to a first preferred embodiment of the present invention.  FIG. 3  is a schematic cross-sectional diagram taken along a line A-A′ in  FIG. 2 . 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. 2  and  FIG. 3 , a touch panel  201  is provided in this embodiment. The touch panel  201  has a transparent region R 1  and a decoration region R 2  disposed on at least one side of the transparent region R 1 . In this embodiment, the decoration region R 2  surrounds the transparent region R 1  preferably, but not limited thereto. The touch panel  201  includes a first substrate  211 , a first decoration layer  221 , a first opaque reflection layer  231 , a touch sensing unit  240 S and a first conductive line  250 . The first substrate  211  has a first surface  211 A and a second surface  211 B opposite to the first surface  211 A. The first substrate  211  may include a glass substrate, a ceramic substrate, a plastic substrate or substrates made of other appropriate materials. The first decoration layer  221  is disposed on the first substrate  211  and disposed in the decoration region R 2 . The touch sensing unit  240 S is at least partially disposed in the transparent region R 1 . The first conductive line  250  is disposed in the decoration region R 2 . The touch sensing unit  240 S in this embodiment partially extends to the decoration region R 2  so as to contact the first conductive line  250  in the decoration region R 2  and be electrically connected to the first conductive line  250 . The first opaque reflection layer  231  is disposed on the first decoration layer  221  and disposed in the decoration region R 2 . The first decoration layer  221  is disposed between the first substrate  211  and the first opaque reflection layer  231 . A reflectance of the first opaque reflection layer  231  is higher than or equal to 30%. 
     In this embodiment, the first decoration layer  221 , the first opaque reflection layer  231 , the touch sensing unit  240 S and the first conductive line  250  are all disposed on a side of the second surface  211 B of the first substrate  211 , but not limited thereto. The first decoration layer  221  is used to present required color effect from the first surface  211 A of the first substrate  211 . The first decoration layer  221  is a non-black decoration layer preferably, but not limited thereto. For example, the first decoration layer  221  may be a white decoration layer. Single or multiple layers of color inks, color resists or other materials with color or texture effects may be used to form the first decoration layer  221 . An optical density (OD) of the first opaque reflection layer is higher than or equal to  2  preferably so as to generate required opaque effect. Additionally, a light beam L irradiating from the first surface  211 A and passing through the first substrate  211  and the first decoration layer  221  may be reflected by the first opaque reflection layer  231  and emitted from the first surface  211 A because of the first opaque reflection layer  231  with high reflectance. The presented color purity of the first decoration layer  221  may be accordingly enhanced by the first opaque reflection layer  231 . In addition, the first opaque reflection layer  231  may also be used to shield the first conductive line  250  from being distinguished from the side of the first surface  211 A, and the thickness of the first decoration layer  221  doesn&#39;t have to be increased for generating shielding effects. The required thickness of the first decoration layer  221  may become thinner, and the crack issues of the touch sensing unit  240 S and/or the first conductive line  250  subsequently formed on the first decoration layer  221  may become minor, and the reliability may be enhanced because the terrain formed by the first decoration layer become relatively smooth. The manufacturing yield and reliability of the touch panel  201  may also be improved accordingly. In this embodiment, the thickness of the first decoration layer  221  substantially ranges between 20 angstroms and 10 micrometers, and a thickness of the first opaque reflection layer  231  is preferably thinner than or equal to 2 micrometers so as to reduce the total thickness of the touch panel  201 , but not limited thereto. 
     It is worth noting that, the first conductive line  250  and the touch sensing unit  240 S in this embodiment are at least partially disposed on the first opaque reflection layer  231 , and the first opaque reflection layer  231  is at least partially disposed between the first conductive line  250  and the first decoration layer  221 . Therefore, the first opaque reflection layer  231  is preferably an insulation layer so as to reduce influence on the electrical properties of the first conductive line  250  and the touch sensing unit  240 S, but not limited thereto. For example, the materials of the first opaque reflection layer  231  may include mirror effect ink (for example, mirror silver), silver ink, multiple layered film or insulating reflection layers formed by non-conductive vacuum metallization (NCVM) processes. Additionally, the first opaque reflection layer  231  may also be a composite layer of a metal reflection layer and an insulation layer. In other words, materials with required reflectance and keeping the first conductive line  250  and the touch sensing unit  240 S working normally may be used to form the first opaque reflection layer  231 . 
     In this embodiment, the touch sensing unit  240 S is used to perform touch sensing functions. The touch sensing unit  240 S may include conductive mesh, triangle electrodes, stripe electrodes or polygonal electrodes made of single layer conductive material or multiple layered conductive materials. The first conductive line  250  is electrically connected to the touch sensing unit  240 S, and the conductive line  250  is at least partially disposed in the decoration region R 2  so as to be electrically connected to other outer units (not shown), such as a flexible printed circuit (FPC), and transmit or receive touch signals. The first conductive line  250  and the touch sensing unit  240 S may respectively include transparent conductive materials such as indium tin oxide (ITO), indium zinc oxide (IZO), and aluminum zinc oxide (AZO), or other appropriate non-transparent conductive materials such as silver (Ag), aluminum (Al), copper (Cu), magnesium (Mg), molybdenum (Mo), a stack layer of the above-mentioned materials or an alloy of the above-mentioned materials, conductive particles, carbon nanotubes (CNTs) and nano silver, but not limited thereto. The first conductive line  250  and the touch sensing unit  240 S may be made of an identical conductive material or different conductive materials according to design considerations. In addition, an electrical resistance of the first conductive line  250  is preferably lower than an electrical resistance of the touch sensing unit  240 S so as to lower the resistance of the conductive wirings in the decoration region R 2 . For instance, the touch sensing unit  240 S maybe made of transparent conductive materials with relatively higher resistivity, and the first conductive line  250  may preferably made of metal materials with relatively lower resistivity, but not limited thereto. The first opaque reflection layer  231  may also be used to shield the first conductive line  250  because the first opaque reflection layer  231  overlaps the first conductive line  250  along a vertical projective direction Z perpendicular to the first substrate  211 . 
     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. 
     Please refer to  FIG. 4 .  FIG. 4  is a schematic diagram illustrating a touch panel  202  according to a second preferred embodiment of the present invention. As shown in  FIG. 4 , the difference between the touch panel  202  in this embodiment and the touch panel in the first preferred embodiment is that the touch panel  202  further includes a second substrate  212  disposed opposite to the first substrate  211 , and the first conductive line  250  and the touch sensing unit  240 S are disposed on the second substrate  212 . The first substrate  211  and the second substrate  212  may be combined together by an adhesive layer (not shown), but not limited thereto. Additionally, the conductive line  250  and the touch sensing unit  240 S may be selectively disposed on a surface of the second substrate  212 , and the surface may face the first substrate  211  or not face the first substrate  211 . Apart from the second substrate  212  and the allocations of the first conductive line  250  and the touch sensing unit  240 S in this embodiment, the other components, allocations, and material properties of the touch panel  202  in this embodiment are similar to those of the first preferred embodiment detailed above and will not be redundantly described. It is worth noting that the second substrate  212  and the first substrate  211  may be made of an identical material or different materials. For example, the first substrate  211  and the second substrate  212  may be a film substrate respectively, or the first substrate  212  maybe a cover substrate while the second substrate  212  is a film substrate, a glass substrate, a ceramic substrate, a plastic substrate or other substrate made of appropriate materials, but not limited thereto. It is worth noting that, in the touch panel  202 , the first substrate  211 , the first decoration layer  221  and the first opaque reflection layer  231  may be used to form a decoration panel  290  of the touch panel  202 . In other words, the decoration panel  290  of the touch panel  202  has a transparent region R 1  and a decoration region R 2  disposed on at least one side of the transparent region R 1 . The decoration panel  290  includes the first substrate  211 , the first decoration layer  221  and the first opaque reflection layer  231 . The first decoration layer  221  is disposed on the first substrate  221  and in the decoration region R 2 . The first opaque reflection layer  231  is disposed on the first decoration layer  221  and in the decoration region R 2 . The first decoration layer  221  is disposed between the first substrate  211  and the first opaque reflection layer  231 . 
     Please refer to  FIG. 5 .  FIG. 5  is a schematic diagram illustrating a touch panel  203  according to a third preferred embodiment of the present invention. As shown in  FIG. 5 , the difference between the touch panel  203  in this embodiment and the touch panel in the first preferred embodiment is that the touch panel  203  includes a first conductive line  240  disposed in the decoration region R 2 . The first conductive line  240  is electrically connected to the touch sensing unit  240 S. It is worth noting that the first conductive line  240  and the touch sensing unit  240 S are preferably formed by an identical conductive material, and the first conductive line  240  and the touch sensing unit  240 S are integrally and monolithically formed so as to lower the influence of high contact resistance generated at an interface between different materials, but not limited thereto. Additionally, the first conductive line  240  is at least partially disposed between the first opaque reflection layer  231  and the first decoration layer  221 , and the first opaque reflection layer  231  may be used to protect the first conductive line  240 . It is worth noting that, when the first opaque reflection layer  231  is composed of a stacked structure of one metal reflection layer and one insulation layer (not shown), the insulation layer is disposed adjacent to the first conductive line  240 , i.e. the insulation layer is disposed between the metal reflection layer and the first conductive line  240  so as to keep the first conductive line  240  from being electrically influenced by the metal reflection layer. 
     Please refer to  FIG. 6  and  FIG. 7 .  FIG. 6  is a schematic diagram illustrating a touch panel  301  according to a fourth preferred embodiment of the present invention.  FIG. 7  is a schematic diagram illustrating a touch panel  302  according to a fifth preferred embodiment of the present invention. As shown in  FIG. 6  and  FIG. 7 , the difference between the touch panel  301  and the touch panel in the first preferred embodiment is that the touch panel  301  further includes an optical compensation layer  260  disposed on the first substrate  211 , and the difference between the touch panel  302  and the touch panel in the first preferred embodiment is that the touch panel  302  further includes the optical compensation layer  260  disposed on the first substrate  211 . The optical compensation layer  260  is disposed in the decoration region R 2 , and the optical compensation layer  260  is disposed between the first substrate  211  and the first opaque reflection layer  231 . The optical compensation layer  260  is used to improve the discoloring problem of the first decoration layer  221  under high temperature processes. The optical compensation layer  260  a color compensation layer or a refractive index compensation layer, but not limited thereto. For example, a refractive index of the optical compensation layer  260  may range between 1.6 and 2.5 preferably so as to provide required refractive index compensation effects, but not limited thereto. Additionally, a thickness of the optical compensation layer  260  is thinner than or equal to 2 micrometers, and the thickness of the optical compensation layer  260  preferably ranges 10 nanometers and 2 micrometers so as to reduce the thickness influence of the optical compensation layer  260  on the total thickness of the optical compensation layer  260 , the first decoration layer  221  and the first opaque reflection layer  231  in the decoration region R 2 . As shown in  FIG. 6 , the optical compensation layer  260  may be disposed between the first substrate  211  and the first decoration layer  211 . As shown in  FIG. 7 , in another embodiment, the optical compensation layer  260  maybe disposed between the first decoration layer  221  and the first opaque reflection layer  231  according to different design consideration. 
     Please refer to  FIG. 8 .  FIG. 8  is a schematic diagram illustrating a touch panel  303  according to a sixth preferred embodiment of the present invention. As shown in  FIG. 8 , the difference between the touch panel  202  in this embodiment and the touch panel in the fourth preferred embodiment is that, in the touch panel  303 , the first conductive line  240  is at least partially disposed between the first opaque reflection layer  231  and the first decoration layer  221 , and the first opaque reflection layer  231  maybe used to protect the first conductive line  240 . Under this structure, the optical compensation layer  260  may be disposed between the first substrate  211  and the first decoration layer  211 , and the optical compensation layer  260  may also be disposed between the first decoration layer  221  and the first opaque reflection layer  231  in other preferred embodiment of the present invention according to different design consideration. 
     Please refer to  FIG. 9  and  FIG. 10 .  FIG. 9  is a schematic diagram illustrating a touch panel  401  according to a seventh preferred embodiment of the present invention.  FIG. 10  is a schematic diagram illustrating a touch panel  402  according to an eighth preferred embodiment of the present invention. As shown in  FIG. 9  and  FIG. 10 , the difference between the touch panel  401  and the touch panel in the first preferred embodiment is that the touch panel  401  further includes a second decoration layer  222  and a second opaque reflection layer  232 , and the difference between the touch panel  402  and the touch panel in the third preferred embodiment is that the touch panel  402  further includes the second decoration layer  222  and the second opaque reflection layer  232 . The second decoration layer  222  is disposed on the first substrate  211  and the first opaque reflection layer  231 . The second decoration layer  222  is disposed in the decoration region R 2 , and the second decoration layer  222  covers an edge of the first decoration layer  221 . A peripheral region of the first substrate  211  may be uncovered by the first decoration layer  221  and the first opaque reflection layer  231  after a cutting process of the first substrate  211  with first decoration layer  221 , and a light leakage issue may occur accordingly. The second decoration layer  222  may be used to improve the light leakage issue described above. Additionally, the second opaque reflection layer  232  is disposed on the second decoration layer  222  and disposed in the decoration region R 2 . The second decoration layer  222  is disposed between the first substrate  211  and the second opaque reflection layer  232 , and a reflectance of the second opaque reflection layer  232  is preferably higher than or equal to 30%. The presented color purity of the second decoration layer  222  may be enhanced by the second opaque reflection layer  232 . The second decoration layer  222  and the second opaque reflection layer  232  at least partially overlap the first decoration layer  221  and the first opaque reflection layer  231  along the vertical projective direction Z so as to further ensure the appearance quality of the decoration region R 2 . The material properties of the second decoration layer  222  and the second opaque reflection layer  232  are similar to those of the first decoration layer  221  and the first opaque reflection layer  231  and will not be redundantly described. 
     Please refer to  FIG. 11  and  FIG. 12 .  FIG. 11  is a schematic diagram illustrating a touch panel  403  according to a ninth preferred embodiment of the present invention.  FIG. 12  is a schematic diagram illustrating a touch panel  404  according to a tenth preferred embodiment of the present invention. As shown in  FIG. 11  and  FIG. 12 , the difference between the touch panel  403  and the touch panel in the seventh preferred embodiment is that the touch panel  403  further includes the optical compensation layer  260  disposed between the first substrate  211  and the first decoration layer  221 , and the difference between the touch panel  404  and the touch panel in the eighth preferred embodiment is that the touch panel  404  further includes the optical compensation layer  260  disposed between the first substrate  211  and the first decoration layer  221 . The optical compensation layer  260  disposed between the first substrate  211  and the first decoration layer  221  is used to improve the discoloring problem of the first decoration layer  221  and the second decoration layer  222  under high temperature processes. Additionally, in other preferred embodiments of the present invention, the optical compensation layer  260  may be selectively disposed between the first decoration layer  221  and the first opaque reflection layer  231 , or the optical compensation layer may also be selectively disposed between the second decoration layer  222  and the second opaque reflection layer  232  so as to provide required optical compensation effects. 
     Please refer to  FIG. 13 .  FIG. 13  is a schematic diagram illustrating a touch panel  500  according to an eleventh preferred embodiment of the present invention. As shown in  FIG. 13 , the difference between the touch panel  500  in this embodiment and the touch panel in the first preferred embodiment is that the touch panel  500  further includes a second conductive line  241 , disposed in the decoration region R 2 . The second conductive line  241  is configured to electrically connect the touch sensing unit  240 S and the first conductive line  250 . It is worth noting that the second conductive line  241  and the touch sensing unit  240 S are preferably made of an identical material, and the second conductive line  241  and the touch sensing unit  240 S are integrally and monolithically formed. The second conductive line  241  is partially disposed between the first conductive line  250  and the first opaque reflection layer  231  preferably, but not limited thereto. In other preferred embodiments of the present invention, the first conductive line  250  may be at least partially disposed between the second conductive line  241  and the first opaque reflection layer  231  so as to form the electrical connection in different directions. In addition, the second conductive line  241  in this embodiment may also be selectively applied to the touch panels of the preferred embodiments described above. 
     One or more patterned openings (not shown) maybe selectively formed in the opaque reflection layer in all of the embodiments described above. A light source or a sensor may be disposed correspondingly to the pattern opening. The light source may be an LED light source, and the sensor may be an infrared receiver. The patterned opening may work as a button pattern, a light emitting hole for the LED light source, or a receiving hole for the sensor. In addition, the touch sensing unit  240 S in all of the embodiments described above is only partially illustrated, and the whole structure of the touch sensing unit  240 S is not limited to the local structure disclosed in the figures. 
     Please refer to  FIG. 14 .  FIG. 14  is a schematic diagram illustrating a touch panel  601  according to a twelfth preferred embodiment of the present invention. As shown in  FIG. 14 , the difference between the touch panel  601  in this embodiment and the touch panel in the first preferred embodiment is that the touch panel  601  further includes a peripheral unit  661  disposed in the decoration region R 2 , and the first opaque reflection layer  231  has a patterned opening H disposed correspondingly to the peripheral unit  661 . The peripheral unit  661  in this embodiment may include a light source, a sensor or other appropriate optical unit such as an image capturing device (like camera), but not limited thereto. The light source mentioned above may include an LED light source or other appropriate light sources. The sensor mentioned above may include an infrared sensor, optical near field sensor or other appropriate sensing devices. The patterned opening H may work as a button pattern, a light emitting hole for the LED light source, or a receiving hole for the sensor. Additionally, the patterned opening H penetrates the first decoration layer  221  and the first opaque reflection layer  231  preferably, but not limited thereto. For instance, when the patterned opening H work as a button pattern, the patterned opening H may only penetrate the first opaque reflection layer  231  so as to make the button pattern readable only as the light source is turned on and make the button pattern invisible as the light source is turned off. Additionally, a touch sensing electrode may be disposed correspondingly to the button pattern so as to provide touch functions on the button pattern. When the patterned opening H is disposed correspondingly to an indication light source, the patterned opening H may only penetrate the first opaque reflection layer  231  so as to make the patterned opening H visible only as the indication light source is turned on, but not limited thereto. The patterned opening H and the peripheral unit  661  in this embodiment may also be selectively applied to the touch panels of the preferred embodiments described above. 
     In addition, a strengthening layer (not shown) can also be provided and at least partially disposed in the transparent region R 1 . The strengthening layer is disposed between the first substrate  211  and the touch sensing unit  240 S for improving the ability of impact resistance of the first substrate  211  and protecting the touch sensing unit  240 S in all of the embodiments described above. The material of the strengthening layer may include transparent organic material, such as polyurethane (PU) group, polyimide (PI) group, epoxy resin group, phenol formaldehyde (PF) resin group, polyester group, silicon-containing rubber (such as polyisoprene rubber), silicon-containing material, rubber material, or composite organic material of the above-mentioned materials. In addition, the strengthening layer may have a composite material of organic material and inorganic material, such as a composite material including acrylic group material as the host doped with silica or Al 2 O 3  particles, wherein the mix of organic material and inorganic material may be performed through chemical bonding or without chemical bonding. For example, the strengthening layer may include positive photoresist or negative photoresist including thermosetting resin or light curing resin. The strengthening layer may also be composed of inorganic material, such as SiO 2 , SiNx, TiO 2  or SiOxNy, organic material, or organic material containing inorganic material. 
     To summarize the above descriptions, in the touch panel of the present invention, the opaque reflection layer disposed in the decoration region is used to enhance the presented color purity of the decoration layer. The opaque reflection layer may also be used to make the collocated decoration layer thinner, the crack issues of the subsequently formed conductive lines and the touch sensing units on the decoration layer may become minor, and the reliability may be enhanced because the terrain formed by the decoration layer become relatively smooth. The related manufacturing yield and reliability may also be improved accordingly. Additionally, the optical compensation layer is disposed in the decoration region so as to improve the discoloring problem of the decoration layer under high temperature processes. 
     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.