WO2015192688A1 - 触控显示装置 - Google Patents

触控显示装置 Download PDF

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Publication number
WO2015192688A1
WO2015192688A1 PCT/CN2015/077068 CN2015077068W WO2015192688A1 WO 2015192688 A1 WO2015192688 A1 WO 2015192688A1 CN 2015077068 W CN2015077068 W CN 2015077068W WO 2015192688 A1 WO2015192688 A1 WO 2015192688A1
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WO
WIPO (PCT)
Prior art keywords
layer
polarizer
display device
touch display
patterned electrode
Prior art date
Application number
PCT/CN2015/077068
Other languages
English (en)
French (fr)
Inventor
许毅中
徐国书
卢凤华
徐承宏
Original Assignee
宸鸿科技(厦门)有限公司
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Filing date
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Publication of WO2015192688A1 publication Critical patent/WO2015192688A1/zh

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Classifications

    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
    • G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
    • G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
    • G06F3/044—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by capacitive means
    • G06F3/0446—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by capacitive means using a grid-like structure of electrodes in at least two directions, e.g. using row and column electrodes
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
    • G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
    • G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
    • G06F3/0412—Digitisers structurally integrated in a display
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
    • G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
    • G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
    • G06F3/044—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by capacitive means
    • G06F3/0443—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by capacitive means using a single layer of sensing electrodes
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
    • G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
    • G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
    • G06F3/044—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by capacitive means
    • G06F3/0445—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by capacitive means using two or more layers of sensing electrodes, e.g. using two layers of electrodes separated by a dielectric layer
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F2203/00—Indexing scheme relating to G06F3/00 - G06F3/048
    • G06F2203/041—Indexing scheme relating to G06F3/041 - G06F3/045
    • G06F2203/04103—Manufacturing, i.e. details related to manufacturing processes specially suited for touch sensitive devices
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F2203/00—Indexing scheme relating to G06F3/00 - G06F3/048
    • G06F2203/041—Indexing scheme relating to G06F3/041 - G06F3/045
    • G06F2203/04111—Cross over in capacitive digitiser, i.e. details of structures for connecting electrodes of the sensing pattern where the connections cross each other, e.g. bridge structures comprising an insulating layer, or vias through substrate
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F2203/00—Indexing scheme relating to G06F3/00 - G06F3/048
    • G06F2203/041—Indexing scheme relating to G06F3/041 - G06F3/045
    • G06F2203/04112—Electrode mesh in capacitive digitiser: electrode for touch sensing is formed of a mesh of very fine, normally metallic, interconnected lines that are almost invisible to see. This provides a quite large but transparent electrode surface, without need for ITO or similar transparent conductive material

Definitions

  • the present invention relates to the field of touch technologies, and in particular, to a touch display device.
  • the applications of touch display devices mainly include: portable electronic products, such as: tablet computers, mobile phones, digital cameras; financial commercial purposes, such as: cash machines, remote video conferencing; public information purposes, such as: airports, stations Guides, data queries, etc.
  • a conventional touch display device generally includes a touch panel and a display panel that are attached to each other.
  • the touch panel further includes an electrode layer for touch sensing.
  • the electrode layer is usually formed by etching a whole layer of the conductive layer to form a patterned electrode layer, because the electrode layer has an electrode region (pattern portion) and The refractive index of the region of the electrode (non-patterned portion) is different, which may cause the electrode pattern to be visible and affect the visual appearance of the touch display device.
  • a conventional method for solving the visible pattern of an electrode includes adding a multilayer optical film to the structure of the touch panel, and adjusting the refractive index of the multilayer optical film to match the refractive index of the electrode layer, thereby reducing the visibility of the electrode pattern.
  • this method requires multiple coating processes, and the overall thickness of the touch display device is increased, which is not conducive to the simplification of the manufacturing process and the slimness of the touch display device.
  • the present invention provides a touch display device to solve the problem that the electrode pattern of the touch display device is visible and the manufacturing process is complicated.
  • a touch display device includes a display module, a polarizer, a first patterned electrode layer, and a first transparent adhesive layer.
  • the first patterned electrode layer is disposed between the polarizer and the display module.
  • the first patterned electrode layer has a pattern portion and a non-pattern portion.
  • the first transparent bonding layer is disposed on the first patterned electrode layer.
  • the refractive index of the first transparent bonding layer is 1.65 or more and 1.72 or less to make the light reflectance of the pattern portion and the non-pattern portion uniform.
  • the first transparent bonding layer may be located between the first patterned electrode layer and the display module.
  • the first transparent bonding layer has a first surface and a second surface.
  • the first surface faces the first patterned electrode layer, and the second surface faces the display module.
  • the refractive index of the first surface is greater than the refractive index of the second surface, and the viscosity of the second surface is greater than the viscosity of the first surface.
  • the touch display device may further include an index matching layer disposed between the polarizer and the first patterned electrode layer.
  • the first transparent bonding layer may be located between the polarizer and the first patterned electrode layer.
  • the first transparent bonding layer may have a first surface and a second surface.
  • the first surface faces the polarizer and the second surface faces the first patterned electrode layer.
  • the refractive index of the second surface is greater than the refractive index of the first surface, and the viscosity of the first surface is greater than the viscosity of the second surface.
  • the touch display device may further include an index matching layer disposed between the display module and the first patterned electrode layer.
  • the polarizer may be provided with at least one shielding layer located in a peripheral region of the polarizer.
  • the touch display device may further include a protective substrate disposed on a side of the polarizer away from the display module.
  • a second transparent bonding layer is disposed between the protective substrate and the polarizer.
  • the second transparent bonding layer has a third surface and a fourth surface opposite to each other.
  • the third surface faces the protective substrate, and the fourth surface faces the polarizer.
  • the refractive index of the fourth surface is greater than the refractive index of the third surface, and the viscosity of the third surface is greater than the viscosity of the fourth surface.
  • At least one shielding layer may be disposed on the protective substrate, which is located in a peripheral region of the protective substrate.
  • the first transparent bonding layer may have a thickness of between 150 ⁇ m and 200 ⁇ m.
  • the touch display device may further include a second patterned electrode layer disposed on the polarizer and disposed between the protective substrate and the polarizer and interlaced with the first patterned electrode layer.
  • the touch display device provided by the embodiment of the present invention can reduce the touch display device by integrating the patterned electrode layer onto the display panel without carrying the patterned electrode layer through another glass substrate.
  • the thickness and the first transparent adhesive layer of the high refractive index are applied to the polarizer and the display module.
  • the first transparent adhesive layer not only has a bonding function, but also has a special high refractive index to make the touch display.
  • the visibility of the electrode pattern in the device is reduced or even invisible, thereby improving the visual appearance of the touch display device, and reducing the coating of the multilayer optical film in the prior art, making the touch display device thinner and lighter, and simplifying the manufacturing process.
  • FIG. 1A is a schematic cross-sectional view of a touch display device according to a first embodiment of the present invention.
  • FIG. 1B is a top plan view of the first patterned electrode layer shown in FIG. 1A.
  • 1C is a cross-sectional view showing another touch display device according to a first embodiment of the present invention.
  • FIG. 1D is a cross-sectional view of still another touch display device according to a first embodiment of the present invention.
  • FIG. 2A is a cross-sectional view of a touch display device according to a second embodiment of the present invention.
  • FIG. 2B is a cross-sectional view of another touch display device according to a second embodiment of the present invention.
  • a touch display device will be described with reference to the accompanying drawings, wherein like elements will be described with the same reference numerals.
  • the orientations "upper” and “lower” as used in the following embodiments are merely used to indicate relative positional relationships.
  • a first element formed “on”, “above”, “lower” or “lower” to a second element may include the first element in the embodiment being in direct contact with the second element, or There may be additional additional elements between the first element and the second element such that the first element is not in direct contact with the second element.
  • FIG. 1A is a schematic cross-sectional view of a touch display device according to a first embodiment of the present invention.
  • the touch display panel 1 includes a display module 11 , a polarizer 12 , a first patterned electrode layer 13 , and a first transparent bonding layer 14 .
  • the touch display device 1 can be used, for example, but not limited to, in a touch system, an interactive advertising system, a store order ordering system, an access control system, an information inquiry system, a withdrawal system, or a portable mobile device. .
  • the display module 11 is a liquid crystal display module (Liquid Crystal Display Module, LCM), which may include a substrate 111, a liquid crystal layer 112, and a thin film transistor (Thin Film Transistor, TFT) substrate 113.
  • the substrate is preferably a color filter (Color Filter, CF) substrate.
  • the substrate 111 is disposed opposite to the thin film transistor substrate 113, and the liquid crystal layer 112 is disposed between the substrate 111 and the thin film transistor substrate 113.
  • the display module 11 can also be, for example, a light-emitting diode display module or an organic light-emitting diode (OLED) display module, and the internal structure and composition thereof can respectively include a light-emitting diode layer. Or an organic light emitting diode layer to replace the liquid crystal layer 112.
  • OLED organic light-emitting diode
  • the polarizer 12 is disposed opposite to the display module 11. Further, the polarizer 12 is disposed above the substrate 111 of the display module 11 , that is, with respect to the other side of the liquid crystal layer 112 . Further, the polarizer 12 may include a polyester film (PET) Film) or a cellulose triacetate film (TAC film), which is not limited herein. In this embodiment, the polarizer 12 can be a protective cover of the touch display device 1 (Cover) Glass), the side away from the substrate 111 can provide a user's direct touch operation. In addition, some functional layers such as anti-glare, anti-fingerprint, anti-reflection and the like may be disposed on the polarizer 12.
  • PET polyester film
  • TAC film cellulose triacetate film
  • the first patterned electrode layer 13 is disposed between the polarizer 12 and the display module 11 .
  • the first patterned electrode layer 13 is disposed on the polarizer 12.
  • the first patterned electrode layer 13 is disposed on the side of the polarizer 12 facing the display module 11 . That is, below the polarizer 12. Since the first patterned electrode layer 13 is formed on the polarizer 12, the polarizer 12 serves as an attachment or carrying member of the first patterned electrode layer 13, thereby saving the glass substrate to which the patterned electrode layer is attached in the prior art.
  • the first patterned electrode layer 13 can be formed by a deposition process such as deposition, exposure, development, or etching.
  • the first patterned electrode layer 13 may include a uniaxial touch electrode (for example, a comb electrode) or a biaxial touch electrode (for example, two axial directions are staggered with each other), and the embodiment is double
  • the axial electrode is taken as an example, but is not limited thereto.
  • FIG. 1B is a top plan view of the first patterned electrode layer shown in FIG. 1A.
  • the first patterned electrode layer 13 has a pattern portion 131 and a non-pattern portion 132.
  • the pattern portion 131 is a portion of the touch electrode, and may be, for example, a plurality of blocks or a plurality of strips. This is illustrated in block form.
  • the non-pattern portion 132 is a portion other than the touch electrode. In this embodiment, it mainly includes a region sandwiched between the block-shaped touch electrodes.
  • the refractive index of the pattern portion 131 has a conductive material, the refractive index thereof is mainly the refractive index of the touch electrode, and the non-pattern portion 132 has no conductive material, and the refractive index thereof is the refractive index of the polarizer 12, and thus the refractive index of the pattern portion 131 is different.
  • the refractive index of the pattern portion 132 is not the same.
  • the difference in reflectance between the pattern portion 131 and the non-pattern portion 132 is large, and the light of the pattern portion 131 Density
  • the density is higher, that is, less light-transmissive, so that the user can easily see the pattern portion 131 of the first patterned electrode layer 13.
  • the first patterned electrode layer 13 is located below the polarizer 12 when viewed from above the touch display surface, that is, the polarizer 12, and the polarizer 12 has a lower transmittance than the ordinary transparent substrate, which can lower the first pattern.
  • the visibility of the pattern portion 131 of the electrode layer 13 is improved, thereby improving the visual effect of the touch display device.
  • a first patterned electrode layer 13 is formed using a material such as a metal nanowire or a metal mesh, the polarized light
  • the sheet 12 can also reduce the visibility of the components, thereby improving the visual effect of the touch display device.
  • the first transparent bonding layer 14 is disposed on the first patterned electrode layer 13.
  • the first transparent bonding layer 14 is located between the first patterned electrode layer 13 and the display module 11 to bond the polarizer 12 to the display module 11.
  • the first transparent bonding layer 14 is different from ordinary optical glue (Optically Clear Adhesive, OCA), the refractive index of ordinary optical adhesives is generally close to that of glass, ranging from about 1.48 to 1.5, and it has only a fitting effect.
  • the first transparent bonding layer 14 of the present invention has a higher refractive index than the ordinary optical adhesive, and the refractive index is preferably 1.65 or more and 1.72 or less, so that the pattern portion 131 and the non-pattern portion 132 are
  • the light reflectance is uniform.
  • the light reflectance of the pattern portion 131 and the non-pattern portion 1321 is equal or substantially equal, that is, the reflectance difference between the pattern portion 131 and the non-pattern portion 132 under the visible light wavelength is small. Thereby, the visibility of the pattern portion 131 is effectively reduced, thereby improving the visual appearance of the touch display device.
  • the first transparent bonding layer 14 has a first surface 141 and a second surface 142 opposite to each other.
  • the first surface 141 faces the first patterned electrode layer 13, the second surface 142 faces the display module 11, and the refractive index of the first surface 141 is greater than the refractive index of the second surface 142, and the viscosity of the second surface 142 is greater than the first The viscosity of the surface 141.
  • the first surface 141 of the first transparent bonding layer 14 is a portion having a high refractive index, a refractive index of 1.65 or more, and 1.72 or less, preferably a refractive index of 1.68 at a wavelength of 550 nm, which can achieve a first reduction.
  • the pattern portion 131 of the patterned electrode layer 13 has an effect of visibility, and the second surface 142 is a highly viscous portion.
  • the function of bonding the polarizer 12 to the display module 11 can be achieved.
  • the thickness of the first transparent bonding layer 14 is between 150 ⁇ m and 200 ⁇ m. In this way, the first transparent adhesive layer 14 is disposed between the polarizer 12 and the display module 11 to simultaneously connect the polarizer 12 and the display module 11 and reduce the visibility of the pattern portion 131.
  • the touch display device 1 further includes an index matching layer 15 disposed on a side of the polarizer 12 facing the display module 11.
  • the index matching layer 15 is located between the polarizer 12 and the first patterned electrode layer 13, which may be a single layer or a composite layer composed of a plurality of layers, and may be patterned according to the first pattern.
  • the refractive index (N value) and the extinction coefficient (K value) of the electrode layer 13 and the refractive index and thickness of the first transparent bonding layer 14 adjust the refractive index and thickness of the index matching layer 15 to further reduce the visibility of the pattern portion 131. .
  • the refractive index of the pattern portion 131 in the first patterned electrode layer 13 is between 1.48 and 2.03, the extinction coefficient is between 0.006 and 0.55, and the refractive index of the first transparent adhesive layer 14 is between Between 1.65 and 1.72, the thickness is between 150 ⁇ m and 200 ⁇ m.
  • the index matching layer 15 includes a first index matching layer 151 and a second index matching layer 152. The first index matching layer 151 is located between the polarizer 12 and the second index matching layer 152, and the second index matching layer 152 is located between the first patterned electrode layer 13 and the first index matching layer 151.
  • the material of the first index matching layer 151 may be, for example but not limited to, yttrium oxide (Nb 2 O 5 ), and the material of the second index matching layer 152 may be, for example but not limited to, silicon oxide (SiO 2 ).
  • the thickness of the first index matching layer 151 is between 4 Between nm and 20 nm, the refractive index is between 2.0 and 2.5; and the thickness of the second index matching layer 152 is between 20 nm and 60.
  • the refractive index is between 1.3 and 1.6, so that the index matching layer 15 can be used for index matching with the first patterned electrode layer 13 and the first transparent bonding layer 14, that is, The difference in light reflectance between the pattern portion 131 and the non-pattern portion 132 in a patterned electrode layer 13 is minimized.
  • At least one shielding layer 121 may be disposed on the polarizer 12, which is located in a peripheral region of the polarizer 121.
  • the shielding layer 121 may shield the leads (not shown) to which the first patterned electrode layer 13 is connected, or shield the circuit board (not shown), or shield other electronic components.
  • the shielding layer 121 may use a light-shielding material having a higher optical density, such as an ink, a photoresist, or a combination thereof. It should be noted that, in the peripheral region, the shielding layer 121 is located between the first patterned electrode layer 13 and the polarizer 12, and correspondingly, the index matching layer 15 is only in the middle region of the touch display device 1.
  • the index matching layer 15 may also extend over the shielding layer 121 such that the shielding layer 121 of the peripheral region is located between the polarizer 12 and the index matching layer 15, or the refractive index matching layer 15 is in the peripheral region. The portion is located between the shielding layer 121 and the polarizer 12.
  • the touch display device 1 a further includes a protective substrate 16 disposed on a side of the polarizer 12 away from the display module 11 , that is, above the polarizer 12 .
  • the protective substrate 16 may be a glass substrate, a plastic substrate, or a sapphire substrate, or may be a six-sided chemically strengthened or a reinforced substrate that is chemically strengthened only on the upper and lower surfaces and physically strengthened on the side, and has a light transmissive property.
  • the protective substrate 16 can be used to prevent the internal structure of the touch display device 1a from being damaged when the user presses the touch display device 1a.
  • some functional layers such as anti-glare, anti-fingerprint, anti-reflection and the like may be disposed on the protective substrate 16.
  • a second transparent adhesive layer 17 is disposed between the protective substrate 16 and the polarizer 12.
  • the protective substrate 16 is bonded to the polarizer 12 by the second transparent adhesive layer 17.
  • the second transparent adhesive layer 17 is a transparent optical adhesive, such as an optical adhesive (OCA), mainly for bonding the protective substrate 16 and the polarizer 12.
  • OCA optical adhesive
  • the second transparent bonding layer 17 may use the same material as the first transparent bonding layer 14 and have a refractive index of 1.65 or more and 1.72 or less, further making the pattern portion 131 and the non-pattern portion.
  • the reflectance difference value of 132 is small.
  • the second transparent bonding layer 17 has a third surface 171 and a fourth surface 172 opposite to each other.
  • the third surface 171 faces the protective substrate 16, and the fourth surface 172 faces the polarizer 12.
  • the refractive index of the fourth surface 172 is greater than the refractive index of the third surface 171, and the viscosity of the third surface 171 is greater than the viscosity of the fourth surface 172.
  • the fourth surface 172 of the second transparent bonding layer 17 is a portion having a high refractive index, and the effect of reducing the visibility of the pattern portion 131 of the first patterned electrode layer 13 can be achieved, while the third surface 171 is a highly viscous portion.
  • the function of bonding the protective substrate 16 and the polarizer 12 can be achieved.
  • the refractive index and characteristics of the second transparent bonding layer 17 can be referred to the first transparent bonding layer 14 described above, and thus will not be described again.
  • the protective substrate 16 is provided with at least one shielding layer 161 located in a peripheral region of the protective substrate 16.
  • the shielding layer 161 may be disposed to shield the leads (not shown) to which the first patterned electrode layer 13 is connected, or shield the circuit board (not shown), or shield other electronic components.
  • the shielding layer 161 may use a light-shielding material having a higher optical density, such as ink, photoresist, or a combination thereof.
  • the index matching layer 15a is also located between the polarizer 12 and the first patterned electrode layer 13.
  • the first patterned electrode layer 13 can be disposed more flat on the polarizer 12 or the index matching layer 15a. There is no need to cross the height difference of the shielding layer 161.
  • the index matching layer 15a is used for index matching with the first patterned electrode layer 13, the first transparent bonding layer 14, and the second transparent bonding layer 17, and the thickness of the index matching layer 15a is adjusted.
  • the refractive index is used for the purpose of index matching.
  • the index matching layer 15a can also be a single layer or a composite layer composed of a plurality of layers, and the description thereof can be referred to the above embodiment, and thus will not be described again.
  • FIG. 1D is a cross-sectional view of still another touch display device according to a first embodiment of the present invention.
  • the patterned electrodes of the touch display device 1b are two-layer separated structures.
  • the touch display device 1b includes a first patterned electrode layer 13a and a second patterned electrode layer 13b.
  • the first patterned electrode layer 13a is disposed on the polarizer 12 and located between the polarizer 12 and the display module 11;
  • the second patterned electrode layer 13b is disposed on the polarizer 12 and located on the protective substrate 16 and the polarizer 12
  • first patterned electrode layer 13a has a first axial touch electrode
  • second patterned electrode layer 13b has a second axial touch electrode
  • first axial direction and the second axial direction are interlaced with each other. , for example, is vertical.
  • the index matching layer 15a of the present embodiment is disposed between the first patterned electrode layer 13a and the polarizer 12, in other embodiments, the index matching layer 15a may also be disposed at Between the two patterned electrode layers 13b and the polarizer 12, the effect of matching the refractive indices of the pattern portion and the non-pattern portion (refer to the pattern portion 131 and the non-pattern portion 132 shown in FIG. 1B) can be achieved.
  • the touch display device 2 includes a display module 21 , a polarizer 22 , a first patterned electrode layer 23 , and a first transparent adhesive layer 24 .
  • the first patterned electrode layer 23 is disposed between the polarizer 22 and the display module 21 .
  • the first transparent bonding layer 24 is disposed on the first patterned electrode layer 23. In the embodiment, the first transparent bonding layer 24 is located between the polarizer 22 and the first patterned electrode layer 23.
  • the display module 21 has a substrate 211 , a liquid crystal layer 212 , and a thin film transistor substrate 213 , and the liquid crystal layer 212 is disposed between the substrate 211 and the thin film transistor substrate 213 .
  • the first patterned electrode layer 23 of the present embodiment is directly formed on the side of the substrate 211 away from the thin film transistor substrate 213, and can be formed by a deposition process such as deposition, exposure, development, or etching.
  • the first patterned electrode layer 23 may include a uniaxial touch electrode (eg, a comb electrode) or a biaxial touch electrode (eg, biaxially staggered with each other).
  • the polarizer 22 is bonded to the display module 21 by the first transparent adhesive layer 24 .
  • the first transparent bonding layer 24 has opposing first and second surfaces 241, 242.
  • the first surface 241 faces the polarizer 22, and the second surface 242 faces the first patterned electrode layer 23.
  • the refractive index of the second surface 242 is greater than the refractive index of the first surface 241, and the viscosity of the first surface 241 is greater than the viscosity of the second surface 242.
  • the second surface 242 of the first transparent bonding layer 24 is a portion having a high refractive index, and the visibility of the pattern portion of the first patterned electrode layer 23 (refer to the pattern portion 131 shown in FIG. 1B) can be reduced.
  • the first surface 241 is a highly viscous portion, and the function of bonding the polarizer 22 to the display module 21 can be achieved.
  • the thickness of the first transparent bonding layer 24 is between 150 ⁇ m and 200 ⁇ m.
  • the first transparent adhesive layer 24 is disposed between the polarizer 22 and the display module 21, and has the effect of connecting the polarizer 22 and the display module 21 and reducing the visibility of the pattern portion 231.
  • the touch display device 2 may further include an index matching layer 25 disposed between the display module 21 and the first patterned electrode layer 23 , for example, between the substrate 211 and the first patterned electrode layer 23 .
  • the index matching layer 25 may be a single layer or a composite layer composed of a plurality of layers, and may have a refractive index (N value) and an extinction coefficient (K value) according to the first patterned electrode layer 23 and
  • the refractive index and thickness of a transparent bonding layer 24 adjust the refractive index and thickness of the index matching layer 25 to further reduce the visibility of the pattern portion (see the pattern portion 131 shown in FIG. 1B), which can be referred to the first embodiment. For example, it will not be described here.
  • a shielding layer 221 may be disposed on the polarizer 22, which is located in a peripheral region of the polarizer 22.
  • the shielding layer 221 can shield the leads (not shown) connected to the first patterned electrode layer 23, or shield the circuit board (not shown), or shield other electronic components.
  • the shielding layer 221 may use a light-shielding material having a higher optical density, such as an ink, a photoresist, or a combination thereof.
  • the touch display device 2 a further includes a protective substrate 26 disposed on a side of the polarizer 22 away from the display module 21 , that is, above the polarizer 22 .
  • the protective substrate 26 may be a glass substrate, a plastic substrate, or a sapphire substrate, which has light transmissivity.
  • the protective substrate 26 can be used to prevent the internal structure of the touch display device 2a from being damaged when the user presses the touch display device 2a.
  • some functional layers such as anti-glare, anti-fingerprint, anti-reflection and the like may be disposed on the protective substrate 26.
  • a second transparent bonding layer 27 is disposed between the protective substrate 26 and the polarizer 22.
  • the protective substrate 26 is bonded to the polarizer 22 by the second transparent adhesive layer 27.
  • the second transparent adhesive layer 27 is a transparent optical adhesive, such as an optical adhesive (OCA), mainly for bonding the protective substrate 26 and the polarizer 22.
  • OCA optical adhesive
  • the second transparent bonding layer 27 may use the same material as the first transparent bonding layer 24, and has a refractive index of 1.65 or more and 1.72 or less, further making the pattern portion and the non-pattern portion ( The difference in reflectance value of the pattern portion 131 and the non-pattern portion 132) shown in FIG. 1B can be made small.
  • the second transparent bonding layer 27 has opposing third surfaces 271 and fourth surfaces 272.
  • the third surface 271 faces the protective substrate 26, and the fourth surface 272 faces the polarizer 22.
  • the refractive index of the fourth surface 272 is greater than the refractive index of the third surface 271, and the viscosity of the third surface 271 is greater than the viscosity of the fourth surface 272.
  • the fourth surface 272 of the second transparent bonding layer 27 is a portion having a high refractive index, and the effect of reducing the visibility of the pattern portion 231 of the first patterned electrode layer 23 can be achieved, while the third surface 271 is a highly viscous portion.
  • the function of bonding the protective substrate 26 to the polarizer 22 can be achieved.
  • the refractive index and characteristics of the second transparent bonding layer 27 can be referred to the above embodiments, and therefore will not be described again.
  • the protective substrate 26 is provided with at least one shielding layer 261 located in a peripheral region of the protective substrate 26.
  • the shielding layer 261 may be disposed to shield the leads (not shown) to which the first patterned electrode layer 23 is connected, or shield the circuit board (not shown), or shield other electronic components.
  • the shielding layer 261 may use a light-shielding material having a higher optical density, such as ink, photoresist, or a combination thereof.
  • index matching layer 25 of the present embodiment can be referred to the second embodiment described above, and details are not described herein again.
  • the touch display device provided by the embodiment of the present invention can reduce the touch display device by integrating the patterned electrode layer onto the display panel without carrying the patterned electrode layer through another glass substrate.
  • the overall thickness and the polarizing plate and the display module are adhered by a first transparent adhesive layer having a high refractive index.
  • the first transparent adhesive layer not only has the function of bonding, but also has the characteristic high refractive index, so that the visibility of the electrode pattern in the touch display device is reduced or invisible, thereby improving the visual appearance of the touch display device, and reducing the present
  • the multi-layer optical film coating in the technology makes the touch display device thinner and lighter, and simplifies the manufacturing process.

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Abstract

本发明公开了触控显示装置包括一显示模组、一偏光片、一第一图案化电极层以及一第一透明粘结层。第一图案化电极层设置于偏光片与显示模组之间。第一图案化电极层具有一图案部分及一非图案部分。第一透明粘结层设置于第一图案化电极层上。第一透明粘结层的折射率是大于等于1.65，且小于等于1.72，以使图案部分及非图案部分的光线反射率一致。藉此，使得触控显示装置中的电极图形可见度降低甚或不可见，从而改善触控显示装置的视觉外观。

Description

触控显示装置 技术领域
本发明涉及触控技术领域，尤其涉及一种触控显示装置。
背景技术
随着科技的进步，触控显示装置的应用也日益增加。目前触控显示装置的应用主要包括：可携式电子产品，如：平板电脑、手机、数位相机；金融商业用途，如：提款机、远端视讯会议；公共资讯用途，如：机场、车站导览、资料查询等。
传统的触控显示装置大致包括相互贴合在一起的触控面板和显示面板。其中，触控面板又包含用于触控感应的电极层，电极层通常是由蚀刻一整层的导电层形成一图案化的电极层，由于电极层中有电极的区域（图案部分）和无电极的区域（非图案部分）对光线的折射率不同，将有可能导致电极图形可见，影响触控显示装置视觉外观效果。
习知解决电极图形可见的方法包括在触控面板结构中增加多层光学膜，通过调整多层光学膜的折射率和电极层的折射率相匹配，从而降低电极图形的可见度。但此方法需要多道镀膜制程，且会导致触控显示装置整体厚度增加，不利于制作工艺的简化及触控显示装置轻薄化。
发明内容
有鉴于此，本发明实施例提供一种触控显示装置，以解决现有技术中触控显示装置电极图形可见，制作工艺复杂的问题。
依据本发明的一种触控显示装置包括一显示模组、一偏光片、一第一图案化电极层以及一第一透明粘结层。第一图案化电极层设置于偏光片与显示模组之间。第一图案化电极层具有一图案部分及一非图案部分。第一透明粘结层设置于第一图案化电极层上。第一透明粘结层的折射率是大于等于1.65，且小于等于1.72，以使图案部分及非图案部分的光线反射率一致。
在一实施例中，第一透明粘结层可位于第一图案化电极层与显示模组之间。
在一实施例中，第一透明粘结层具有相对的一第一表面及一第二表面。第一表面朝向第一图案化电极层，第二表面朝向显示模组。第一表面的折射率大于第二表面的折射率，第二表面的粘性大于第一表面的粘性。
在一实施例中，触控显示装置可更包括一折射率匹配层，其设置于偏光片与第一图案化电极层之间。
在一实施例中，第一透明粘结层可位于偏光片与第一图案化电极层之间。
在一实施例中，第一透明粘结层可具有相对的一第一表面及一第二表面。第一表面朝向偏光片，第二表面朝向第一图案化电极层。第二表面的折射率大于第一表面的折射率，第一表面的粘性大于第二表面的黏性。
在一实施例中，触控显示装置可更包括一折射率匹配层，其设置于显示模组与第一图案化电极层之间。
在一实施例中，偏光片上可设置有至少一遮蔽层，其位于偏光片的周边区域。
在一实施例中，触控显示装置可更包括一保护基板，其设置于偏光片上远离显示模组的一侧。
在一实施例中，保护基板与偏光片之间设置有一第二透明粘结层。
在一实施例中，第二透明粘结层具有相对的一第三表面及一第四表面。第三表面朝向保护基板，第四表面朝向偏光片。第四表面的折射率大于第三表面的折射率，第三表面的粘性大于第四表面的黏性。
在一实施例中，保护基板上可设置有至少一遮蔽层，其位于保护基板的周边区域。
在一实施例中，第一透明粘结层厚度可介于150μm至200μm之间。
在一实施例中，触控显示装置可更包括一第二图案化电极层，其设置于偏光片上，并位于保护基板与偏光片之间，且与第一图案化电极层交错设置。
承上所述，本发明实施例提供的触控显示装置，藉由将图案化电极层整合至显示面板上，而不需透过另外的玻璃基板承载图案化电极层，可减少触控显示装置的厚度，并通过高折射率的第一透明粘结层贴合偏光片和显示模组，第一透明粘结层不仅具有贴合的作用，更可通过其特有的高折射率使得触控显示装置中的电极图形可见度降低甚或不可见，从而改善触控显示装置的视觉外观，同时减少现有技术中的多层光学膜镀膜，使得触控显示装置更加轻薄化，且简化了制作工艺。
附图说明
图1A为本发明第一实施例的一种触控显示装置的剖面示意图。
图1B为图1A所示第一图案化电极层的俯视示意图。
图1C为本发明第一实施例的另一种触控显示装置的剖面示意图。
图1D为本发明第一实施例的又一种触控显示装置的剖面示意图。
图2A为本发明第二实施例的一种触控显示装置的剖面示意图。
图2B为本发明第二实施例的另一种触控显示装置的剖面示意图。
符号说明
1、1a、1b、2、2a：触控显示面板
11、21：显示模组
111、211：基板
112、212：液晶层
113、213：薄膜电晶体基板
12、22：偏光片
121、161、221、262：遮蔽层
13、13a、23：第一图案化电极层
13b：第二图案化电极层
131：图案部分
132：非图案部分
14、24：第一透明粘结层
141、241：第一表面
142、242：第二表面
15、15a、25：折射率匹配层
151：第一折射率匹配层
152：第二折射率匹配层
16、26：保护基板
17、27：第二透明粘结层
171、271：第三表面
172、272：第四表面
具体实施方式
下面结合附图与具体实施方式对本发明作进一步详细描述。
以下将参照相关图式，说明依本发明较佳实施例的一种触控显示装置，其中相同的元件将以相同的参照符号加以说明。以下实施例的内容中所称的方位「上」及「下」仅是用来表示相对的位置关系。再者，一第一元件形成于一第二元件「上」、「之上」、「下」或「之下」可包含实施例中的该第一元件与该第二元件直接接触，或也可包含该第一元件与第二元件之间更有其他额外元件使该第一元件与第二元件无直接接触。
图1A为本发明第一实施例的一种触控显示装置的剖面示意图。请参照图1A，触控显示面板1包括一显示模组11、一偏光片12、一第一图案化电极层13及一第一透明粘结层14。触控显示装置1可例如但不限于应用在一触控系统、一互动广告系统、一卖场优惠订购系统、一门禁识别系统、一资讯查询系统、一提款系统或一可携式行动装置等。
在本实施例中，显示模组11为液晶显示模组（Liquid Crystal Display Module, LCM），其可包括一基板111、一液晶层112及一薄膜电晶体（Thin Film Transistor, TFT）基板113。于此，基板较佳为彩色滤光（Color Filter, CF）基板。基板111与薄膜电晶体基板113相对设置，而液晶层112设置于基板111与薄膜电晶体基板113之间。不过，在其他实施态样中，显示模组11也可例如为发光二极体显示模组或有机发光二极体（OLED）显示模组，其内部结构与组成可分别包括发光二极体层或有机发光二极体层，以置换液晶层112。
偏光片12与显示模组11相对设置。进一步来说，偏光片12是设置于显示模组11的基板111上方，也就是相对于液晶层112的另一侧。此外，偏光片12可包括聚酯膜（PET film）或三醋酸纤维素薄膜（TAC film），在此不作限制。在本实施例中，偏光片12可为触控显示装置1的保护盖板（Cover Glass），其远离基板111的一侧可提供使用者直接触碰操作。另外，还可在偏光片12上设置一些功能层，例如抗眩光、抗指纹、抗反射等功能层。
第一图案化电极层13设置于偏光片12与显示模组11之间。在本实施例中，第一图案化电极层13是设置于偏光片12上。进一步而言，第一图案化电极层13是设置于偏光片12上朝向显示模组11的一侧, 也就是偏光片12的下方。由于第一图案化电极层13是形成于偏光片12上，偏光片12作为第一图案化电极层13的依附或承载元件，藉此可节省现有技术中图案化电极层所依附的玻璃基板，以减少触控显示装置1的整体厚度。在实施上，第一图案化电极层13可藉由沉积、曝光、显影或蚀刻等制作工艺来形成。此外，第一图案化电极层13可包括单轴向的触控电极（例如是梳状电极）或双轴向的触控电极（例如是二轴向彼此交错排列），本实施例是以双轴向电极为例，但并不以此为限。
图1B为图1A所示第一图案化电极层的俯视示意图。请参照图1B所示，第一图案化电极层13具有一图案部分131及一非图案部分132。图案部分131为上述触控电极的部分，可例如为多个块状或多个条状的组合, 于此是以块状示意。非图案部分132为触控电极以外的部分，在本实施例中，主要包括夹在块状触控电极之间的区域。由于图案部分131具有导电材料，其折射率主要为触控电极的折射率，而非图案部分132不具有导电材料，其折射率为偏光片12的折射率，因此图案部分131的折射率与非图案部分132的折射率不相同。外部光线穿透偏光片12到达第一图案化电极层13，再经由第一图案化电极层13反射出去后，图案部分131和非图案部分132的反射率差异较大，并且图案部分131的光密度（optical density）较高，也就是较不易透光，因此使用者容易看见第一图案化电极层13的图案部分131。
从触控显示面也即偏光片12之上方往下看，第一图案化电极层13位于偏光片12之下，由于偏光片12的透光率较普通透明基板低，其可降低第一图案化电极层13的图案部分131的可见度，从而提高触控显示装置视觉效果。或者，当第一图案化电极层13中存在一些不透光或高反射的元件时，例如金属桥接结构、采用金属奈米导线或金属网格等材料形成第一图案化电极层13时，偏光片12还可以降低该些部件的可见度，从而提高触控显示装置视觉效果。
请同时参照图1A及图1B所示，第一透明粘结层14设置第一图案化电极层13上。在本实施例中，第一透明粘结层14是位于第一图案化电极层13与显示模组11之间，以将偏光片12与显示模组11相贴合。第一透明粘结层14不同于普通的光学胶（Optically Clear Adhesive, OCA），普通光学胶的折射率一般与玻璃相近，范围大约为1.48至1.5，且其仅有贴合的作用。而本发明之第一透明粘结层14相较于普通光学胶，具有较高的折射率，折射率较佳是大于等于1.65，且小于等于1.72，以使图案部分131与非图案部分132的的光线反射率一致，较佳的，图案部分131与非图案部分1321的光线反射率相等或基本相等，即，使得图案部分131及非图案部分132可见光波长的光线下的反射率差值较小，藉以有效地降低图案部分131的可见度，从而改善触控显示装置的视觉外观。
详细而言，第一透明粘结层14具有相对的一第一表面141及一第二表面142。第一表面141朝向第一图案化电极层13，第二表面142朝向显示模组11，且第一表面141的折射率大于第二表面142的折射率，而第二表面142的粘性大于第一表面141的黏性。换句话说，第一透明粘结层14的第一表面141为高折射率的部分，折射率大于等于1.65，且小于等于1.72，较佳在550nm波长下折射率为1.68，可实现降低第一图案化电极层13的图案部分131可见度的效果，而第二表面142为高粘性的部分, 可实现将偏光片12与显示模组11贴合的功能。其中，第一透明粘结层14的厚度是介于150μm至200μm之间。如此一来，藉由第一透明粘结层14设置于偏光片12及显示模组11之间，可同时具有将偏光片12及显示模组11连结，以及降低图案部分131可见度的效果。
较佳地，触控显示装置1可更包括一折射率匹配层15，其设置于偏光片12上朝向显示模组11的一侧。在本实施例中，折射率匹配层15位于偏光片12与第一图案化电极层13之间，其可为一单层或由多层所组成的复合迭层，并可根据第一图案化电极层13的折射率(N值)和消光系数（K值）以及第一透明粘结层14的折射率和厚度调整折射率匹配层15的折射率和厚度，以进一步降低图案部分131的可见度。例如，第一图案化电极层13中的图案部分131的折射率是介于1.48至2.03之间，消光系数是介于0.006至0.55之间，第一透明粘结层14的折射率是介于1.65至1.72之间，厚度是介于150μm至200μm之间。在本实施例中，折射率匹配层15包括第一折射率匹配层151和第二折射率匹配层152。第一折射率匹配层151位于偏光片12与第二折射率匹配层152之间，第二折射率匹配层152位于第一图案化电极层13与第一折射率匹配层151之间。第一折射率匹配层151的材料可例如但不限定为氧化铌（Nb2O5），第二折射率匹配层152的材料可例如但不限定为及氧化硅（SiO2）。其中，第一折射率匹配层151的厚度是介于4 nm至20 nm之间，折射率是介于2.0至2.5之间；而第二折射率匹配层152的厚度是介于20 nm至60 nm之间，折射率是介于1.3至1.6之间，如此，可使得折射率匹配层15与第一图案化电极层13及第一透明粘结层14作折射率匹配用，也即使得第一图案化电极层13中图案部分131与非图案部分132的光线反射率差异值最小化。
此外，偏光片12上可设置有至少一遮蔽层121，其位于偏光片121的周边区域。遮蔽层121可遮蔽第一图案化电极层13连接的引线（图未示），或遮蔽电路板(图未示)，或遮蔽其他电子元件。于此，遮蔽层121可使用光密度较高的遮光材料，例如油墨、光阻、或其组合。需要说明的是，在周边区域，遮蔽层121是位于第一图案化电极层13与偏光片12之间，相对应的，折射率匹配层15仅于触控显示装置1的中间区域。在其他实施例中，折射率匹配层15还可延伸覆盖遮蔽层121，使周边区域的遮蔽层121位于偏光片12与折射率匹配层15之间，或者使得折射率匹配层15在周边区域的部份位于遮蔽层121与偏光片12之间。
图1C为本发明第一实施例的另一种触控显示装置的剖面示意图。请参照图1C所示，在本实施例中，触控显示装置1a更包括一保护基板16，其设置于偏光片12上远离显示模组11的一侧，也就是偏光片12的上方。保护基板16可为玻璃基板、塑胶基板、或蓝宝石基板，还可为六面化学强化，或仅上、下表面化学强化而侧面物理强化的强化基板，其具有透光性。保护基板16可用以避免使用者按压触控显示装置1a时破坏触控显示装置1a的内部结构。另外，还可在保护基板16上设置一些功能层，例如抗眩光、抗指纹、抗反射等功能层。
保护基板16与偏光片12之间设置有一第二透明粘结层17。在本实施例中，保护基板16是藉由第二透明粘结层17贴合于偏光片12上。第二透明粘结层17为透明光学粘胶，例如光学胶（OCA），主要为贴合保护基板16与偏光片12的作用。
在另一实施例中，第二透明粘结层17可使用与第一透明粘结层14相同的材料，其折射率是大于等于1.65，且小于等于1.72，进一步使图案部分131及非图案部分132的反射率差异值较小。具体而言，第二透明粘结层17具有相对的一第三表面171及一第四表面172。第三表面171朝向保护基板16，第四表面172朝向偏光片12。第四表面172的折射率大于第三表面171的折射率，第三表面171的粘性大于第四表面172的黏性。类似地，第二透明粘结层17的第四表面172为高折射率的部分，可实现降低第一图案化电极层13的图案部分131可见度的效果，而第三表面171为高粘性的部分，可实现将保护基板16与偏光片12贴合的功能。此外，第二透明粘结层17的折射率与特性可参照上述第一透明粘结层14所述，因此不再赘述。
另外，在本实施例中，保护基板16上设置有至少一遮蔽层161，其位于保护基板16的周边区域。设置遮蔽层161可遮蔽第一图案化电极层13连接的引线（图未示），或遮蔽电路板（图未示），或遮蔽其他电子元件。于此，遮蔽层161可使用光密度较高的遮光材料，例如油墨、光阻、或其组合。
另外，在本实施例中，折射率匹配层15a同样是位于偏光片12与第一图案化电极层13之间。与上述实施例不同的是，由于遮蔽层161是设置于保护基板16上而非偏光片12上，因此第一图案化电极层13可更加平坦的设置于偏光片12或折射率匹配层15a上，无需跨越遮蔽层161的高度差。于此，折射率匹配层15a是与第一图案化电极层13、第一透明粘结层14及第二透明粘结层17作折射率匹配用，并以调整折射率匹配层15a的厚度和折射率来实现折射率匹配的目的。另外，折射率匹配层15a同样可为一单层或由多层所组成的复合迭层，其叙述可参照上述实施例所述，因此不再赘述。
图1D为本发明第一实施例的又一种触控显示装置的剖面示意图。请参照图1D所示，在本实施例中，触控显示装置1b的图案化电极为双层分离的结构。具体而言，触控显示装置1b包括一第一图案化电极层13a及一第二图案化电极层13b。第一图案化电极层13a设置于偏光片12上，并位于偏光片12与显示模组11之间；第二图案化电极层13b设置于偏光片12上，并位于保护基板16与偏光片12之间，且与第一图案化电极层13a交错设置。也就是说，第一图案化电极层13a及一第二图案化电极层13b是分别设置于偏光片12相异的两侧。
进一步而言，第一图案化电极层13a具有第一轴向的触控电极，而第二图案化电极层13b具有第二轴向的触控电极，第一轴向与第二轴向彼此交错，例如是垂直。
此外，其他元件的叙述可参照上述，因此不再赘述。
值得一提的是，虽然本实施例的折射率匹配层15a是设置于第一图案化电极层13a与偏光片12之间，然而在其他实施例中，折射率匹配层15a也可以设置于第二图案化电极层13b与偏光片12之间，同样可达到图案部分与非图案部分（可参照图1B所示的图案部分131与非图案部分132）的折射率匹配的效果。
图2A为本发明第二实施例的一种触控显示装置的剖面示意图。请参照图2A所示，触控显示装置2包括显示模组21、偏光片22、第一图案化电极层23及第一透明粘结层24。第一图案化电极层23设置于偏光片22与显示模组21之间。第一透明粘结层24设置于第一图案化电极层23上。在本实施例中，第一透明粘结层24是位于偏光片22与第一图案化电极层23之间。
详细而言，显示模组21具有基板211、液晶层212及薄膜电晶体基板213，液晶层212设置于基板211与薄膜电晶体基板213之间。本实施例的第一图案化电极层23是直接形成于基板211上远离薄膜电晶体基板213的一侧，其可藉由沉积、曝光、显影或蚀刻等制作工艺来形成。同样地，第一图案化电极层23可包括单轴向的触控电极（例如是梳状电极）或双轴向的触控电极（例如是二轴向彼此交错排列）。于此，偏光片22是藉由第一透明粘结层24贴合于显示模组21上。
在本实施例中，第一透明粘结层24具有相对的第一表面241及第二表面242。第一表面241朝向偏光片22，第二表面242朝向第一图案化电极层23。第二表面242的折射率大于第一表面241的折射率，第一表面241的黏性大于第二表面242的黏性。换句话说，第一透明粘结层24的第二表面242为高折射率的部分，可实现降低第一图案化电极层23的图案部分（可参照图1B所示的图案部分131）可见度的效果，而第一表面241为高粘性的部分，可实现将偏光片22与显示模组21贴合的功能。其中，第一透明粘结层24的厚度是介于150μm至200μm之间。如此一来，藉由第一透明粘结层24设置于偏光片22与显示模组21之间，可同时具有将偏光片22及显示模组21连结，以及降低图案部分231可见度的效果。
另外，触控显示装置2可更包括一折射率匹配层25，其设置于显示模组21与第一图案化电极层23之间，例如是位于基板211与第一图案化电极层23之间。同样地，折射率匹配层25可为一单层或由多层所组成的复合迭层，并可根据第一图案化电极层23的折射率（N值）和消光系数（K值）以及第一透明粘结层24的折射率和厚度调整折射率匹配层25的折射率和厚度，以进一步降低图案部分（可参照图1B所示的图案部分131）的可见度，其说明可参照第一实施例所述，于此不再赘述。
另外，偏光片22上可设置有遮蔽层221，其位于偏光片22的周边区域。遮蔽层221可遮蔽第一图案化电极层23连接的引线（图未示），或遮蔽电路板（图未示），或遮蔽其他电子元件。于此，遮蔽层221可使用光密度较高的遮光材料，例如油墨、光阻、或其组合。
图2B为本发明第二实施例的另一种触控显示装置的剖面示意图。请参照图2A所示，在本实施例中，触控显示装置2a更包括一保护基板26，其设置于偏光片22上远离显示模组21的一侧，也就是偏光片22的上方。保护基板26可为玻璃基板、塑胶基板、或蓝宝石基板，其具有透光性。保护基板26可用以避免使用者按压触控显示装置2a时破坏触控显示装置2a的内部结构。另外，还可在保护基板26上设置一些功能层，例如抗眩光、抗指纹、抗反射等功能层。
保护基板26与偏光片22之间设置有一第二透明粘结层27。在本实施例中，保护基板26是藉由第二透明粘结层27贴合于偏光片22上。第二透明粘结层27为透明光学粘胶，例如光学胶（OCA），主要为贴合保护基板26与偏光片22的作用。
在另一实施例中，第二透明粘结层27可使用与第一透明粘结层24相同的材料，其折射率是大于等于1.65，且小于等于1.72，进一步使图案部分及非图案部分（可参照图1B所示的图案部分131及非图案部分132）的反射率差异值较小。具体而言，第二透明粘结层27具有相对的第三表面271及第四表面272。第三表面271朝向保护基板26，第四表面272朝向偏光片22。第四表面272的折射率大于第三表面271的折射率，第三表面271的粘性大于第四表面272的黏性。类似地，第二透明粘结层27的第四表面272为高折射率的部分，可实现降低第一图案化电极层23的图案部分231可见度的效果，而第三表面271为高粘性的部分，可实现将保护基板26与偏光片22贴合的功能。此外，第二透明粘结层27的折射率与特性可参照上述实施例所述，因此不再赘述。
另外，在本实施例中，保护基板26上设置有至少一遮蔽层261，其位于保护基板26的周边区域。设置遮蔽层261可遮蔽第一图案化电极层23连接的引线（图未示），或遮蔽电路板（图未示），或遮蔽其他电子元件。于此，遮蔽层261可使用光密度较高的遮光材料，例如油墨、光阻、或其组合。
另外，本实施例的折射率匹配层25可参照上述第二实施例所述，不再赘述。
综上所述，本发明实施例提供的触控显示装置，藉由将图案化电极层整合至显示面板上，而不需透过另外的玻璃基板承载图案化电极层，可减少触控显示装置的整体厚度，并通过高折射率的第一透明粘结层贴合偏光片和显示模组, 第一透明粘结层不仅具有贴合的作用，更可通过其特有的高折射率使得触控显示装置中的电极图形可见度降低甚或不可见，从而改善触控显示装置的视觉外观，同时减少现有技术中的多层光学膜镀膜，使得触控显示装置更加轻薄化，且简化了制作工艺。
以上所述仅为本发明的较佳实施例而已，并不用以限制本发明, 凡在本发明的精神和原则之内, 所做的任何修改、等同替换、改进等，均应包含在本发明保护的范围之内。

Claims (14)

  1. 一种触控显示装置，其特征在于，包括：
    显示模组；
    一偏光片；
    一第一图案化电极层，设置于该偏光片与该显示模组之间，该第一图案化电极层具有一图案部分及一非图案部分；以及
    一第一透明粘结层，设置于该第一图案化电极层上，且该第一透明粘结层的折射率是大于等于1.65，且小于等于1.72，以使该图案部分及该非图案部分的光线反射率一致。
  2. 根据权利要求1所述的触控显示装置，其特征在于，该第一透明粘结层位于该第一图案化电极层与该显示模组之间。
  3. 根据权利要求2所述的触控显示装置，其特征在于，该第一透明粘结层具有相对的一第一表面及一第二表面，该第一表面朝向该第一图案化电极层，该第二表面朝向该显示模组，且该第一表面的折射率大于该第二表面的折射率，该第二表面的粘性大于该第一表面的粘性。
  4. 根据权利要求2所述的触控显示装置，其特征在于，更包括一折射率匹配层，其设置于该偏光片与该第一图案化电极层之间。
  5. 根据权利要求1所述的触控显示装置，其特征在于，该第一透明粘结层位于该偏光片与该第一图案化电极层之间。
  6. 根据权利要求5所述的触控显示装置，其特征在于，该第一透明粘结层具有相对的一第一表面及一第二表面，该第一表面朝向该偏光片，该第二表面朝向该第一图案化电极层，且该第二表面的折射率大于该第一表面的折射率，该第一表面的粘性大于该第二表面的黏性。
  7. 根据权利要求5所述的触控显示装置，其特征在于，更包括一折射率匹配层，设置于该显示模组与该第一图案化电极层之间。
  8. 根据权利要求1所述的触控显示装置，其特征在于，该偏光片上设置有至少一遮蔽层，该遮蔽层位于该偏光片的周边区域。
  9. 根据权利要求1所述的触控显示装置，其特征在于，更包括一保护基板，其设置于该偏光片上远离该显示模组的一侧。
  10. 根据权利要求9所述的触控显示装置，其特征在于，该保护基板与该偏光片之间设置有一第二透明粘结层。
  11. 根据权利要求10所述的触控显示装置，其特征在于, 该第二透明粘结层具有相对的一第三表面及一第四表面, 该第三表面朝向该保护基板，该第四表面朝向该偏光片，且该第四表面的折射率大于该第三表面的折射率，该第三表面的粘性大于该第四表面的黏性。
  12. 根据权利要求9所述的触控显示装置，其特征在于，该保护基板上设置有至少一遮蔽层，该遮蔽层位于该保护基板的周边区域。
  13. 根据权利要求1所述的触控显示装置，其特征在于，该第一透明粘结层厚度介于150μm至200μm之间。
  14. 根据权利要求9所述的触控显示装置，其特征在于，更包括一第二图案化电极层，其设置于该偏光片上，并位于该保护基板与该偏光片之间，且与该第一图案化电极层交错设置。
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