TW201541307A - Touch display structure and manufacturing method thereof - Google Patents

Abstract

A touch display structure of the present invention comprises at least: a first polarizing layer, a plurality of sensing structures and a display unit; the first polarizing layer has an upper surface; the plurality of sensing structures are located at the upper surface of the first polarizing layer; the display unit is located below the first polarizing layer. Preferably, the display unit includes a second polarizing layer, a backlight unit, and a liquid crystal unit interposed between the first polarizing layer and the second polarizing layer.

Description

Touch display structure and manufacturing method thereof

The invention provides a touch display structure and a manufacturing method thereof, and provides a touch display structure and a manufacturing method thereof, which have the advantages of reducing the thickness of the touch display structure, improving the touch sensitivity, reducing the manufacturing cost, and improving the module manufacturing yield.

In today's market for consumer electronics products, portable electronic products such as personal digital assistants (PDAs), mobile phones, notebooks, and tablet PCs have been widely used. A touch panel is used as an interface tool for data communication. In addition, since the design of electronic products is currently in the direction of light, thin, short and small, there is not enough space on the product to accommodate traditional input devices such as keyboards and mice, especially in the demand for tablet PCs that are designed with humanity in mind. Next, touch panels have become one of the key components. In addition to the multi-level menu design requirements, the touch panel can also have the functions of keyboard, mouse and other humanized operation modes, especially the integration of input and output in the same interface (screen). The traits are beyond the reach of other traditional input devices.

Currently, flat panel displays with touch functions have a wide variety of methods and structures. The early touch panels were independently produced, and only after they were completed, they were combined with the size-matched LCD panels. Therefore, if a flat panel display with touch function is to be manufactured, one of the most direct methods is to pass a touch panel through a bonding means, such as coating. a layer of adhesive layer attached to the front surface of the front panel of the liquid crystal display panel, and the touch The control panel and the liquid crystal display panel comprise a protective plate, an adhesive layer, a substrate, at least two sensing structures, an upper polarizer, a lower glass plate and a lower polarizer.

However, in the development process of the above-mentioned touch-type flat panel display, since the touch panel becomes a multi-layer structure, the cost of the production process is increased, the light passes through the liquid crystal display panel, and the structure of the multi-layer touch panel is easily caused to cause light transmittance or viewing angle compensation. The optical properties such as sex are insufficient, which limits the visibility of the touch panel display.

In view of the problems in the prior art, the present invention provides a touch display structure and a manufacturing method thereof, which have the advantages of thin device, superior touch sensitivity, low manufacturing cost, and high module fabrication yield.

To achieve the above objective, the touch display structure of the present invention comprises at least: a first polarizing layer, a plurality of sensing structures, and a display unit; the first polarizing layer has an upper surface; and the plurality of sensing structures are located at the first polarizing layer The upper surface; and the display unit is located below the first polarizing layer.

According to the above technical feature, the display unit further includes a second polarizing layer and a backlight unit, and the backlight unit emits light through the second polarizing layer and the first polarizing layer to perform polarization.

According to the above technical feature, the display unit further includes a liquid crystal unit, and the liquid crystal unit is located between the first polarizing layer and the second polarizing layer.

According to the above technical feature, the touch display structure further has a cover layer on the complex sensing structure.

The method for manufacturing a touch display structure according to the present invention includes: forming a first polarizing layer having an upper surface; forming a plurality of sensing structures on the upper surface of the first polarizing layer; and bonding The first polarizing layer is above a display unit.

The method for manufacturing a touch display structure according to the present invention includes: forming a first polarizing layer having an upper surface; forming a plurality of sensing structures on the upper surface of the first polarizing layer; providing a liquid crystal a unit; a second polarizing layer is disposed under a liquid crystal unit; a backlight unit is disposed under the second polarizing layer; and the first polarizing layer is attached to the liquid crystal unit.

In order to achieve the above object, a method for manufacturing a touch display structure according to the present invention includes: bonding a second polarizing layer under a liquid crystal cell; and providing a backlight unit under the second polarizing layer; forming a first a polarizing layer having an upper surface; forming a plurality of sensing structures on the upper surface of the first polarizing layer; and bonding the first polarizing layer on the liquid crystal cell. According to the above technical feature, the manufacturing method further includes forming a cover layer on the sensing structures.

According to the above technical features, the method further includes forming a cover layer over the plurality of sensing structures.

Accordingly, as described above, the touch display structure and the manufacturing method thereof provided by the present invention can significantly reduce the manufacturing cost by arranging the sensing structure on the upper surface of the first polarizing layer without setting the substrate, and can omit the process Steps and have the effect of making the product lighter and thinner.

110, 210, 310, 410, 510, 610, 710, 810‧‧‧ first polarizing layer

111, 611, 811‧‧‧ upper surface

112, 612‧‧‧ lower surface

120, 220, 320, 420, 520, 620, 720, 820, 920 ‧ ‧ sensing structure

121, 221, 321, 421, 521, 621, 721, 821, 921‧‧‧ first transparent sensing series

122, 222, 322, 422, 522, 622, 722, 822, 922‧‧‧ first peripheral lines

123‧‧‧Second sensing string

130, 230, 330, 430, 530, 630, 730, 830‧‧‧ display units

231, 331, 431, 731, 831‧‧‧ second polarizing layer

232, 332, 432, 732, 832‧‧ ‧ backlight unit

333, 433, 733, 833‧‧‧ liquid crystal cells

434‧‧‧ bottom layer

140, 440, 540, 640, 740, 840, 940 ‧ ‧ compliant layers

550, 950‧‧ ‧ overlay

661‧‧‧Transparent conductive layer

662‧‧‧metal layer

1a to 1b are schematic views showing the structure of a touch display structure according to a first embodiment of the present invention.

FIG. 2 is a schematic structural view of a touch display structure according to a second embodiment of the present invention.

FIG. 3 is a schematic structural view of a touch display structure according to a third embodiment of the present invention.

FIG. 4 is a view showing the structure of a touch display structure according to a fourth embodiment of the present invention; intention.

FIG. 5 is a schematic structural view of a touch display structure according to a fifth embodiment of the present invention.

6a-6d are schematic views showing a manufacturing method of the touch display structure according to the first embodiment of the present invention.

7a-7d are schematic views showing a manufacturing method of the touch display structure according to the second embodiment of the present invention.

8a-8d are schematic views showing a manufacturing method of the touch display structure according to the third embodiment of the present invention.

FIG. 9 is a schematic view showing a manufacturing method of a touch display structure according to a fourth embodiment of the present invention.

Please refer to FIG. 1a for a schematic structural diagram of a touch display structure according to an embodiment of the present invention. First, the touch display structure of the present invention includes: a first polarizing layer 110, a plurality of sensing structures 120, and a display unit 130; the first polarizing layer 110 has an opposite upper surface 111 and a lower surface 112, and the first polarizing layer 110 The material may be, for example, a PET protective film, a PSA pressure sensitive adhesive, a TAC triacetate cellulose, a PVA polyvinyl alcohol, a PET release film, or the like, but is not limited thereto.

The complex sensing structure 120 is located on the first polarizing layer upper surface 111; wherein, in the embodiment shown in the figure, the complex sensing structure 120 has a plurality of first transparent sensing series 121 and a first peripheral line 122 connected to each other. The first peripheral line 122 is located at the peripheral frame edge of the first polarizing layer 110, and is in contact with the first transparent sensing series 121 to form an electrical connection, and the first peripheral line 122 is electrically connected to the gold at the other end. Fingers (not shown) are available for electrical connection to the FPC. As a matter of course, the sensing structure can also be a single-sided bridging structure of the capacitive touch panel, which has a plurality of first and second transparent sensing series 121, 123, and a plurality of first transparent sensing strings. Column The 121 series are arranged along the first direction Y, and the plurality of second sensing strings 123 are arranged along the second direction X; or may be a resistive touch panel. The first transparent sensing series or the second transparent sensing series may be made of a material having light transmissive ability and electrical conductivity, for example, may be a metal oxide, wherein the metal oxide may be, for example, indium tin oxide (indium). Tin oxide, ITO), indium zinc oxide (IZO), cadmium tin oxide (CTO), aluminum zinc oxide (AZO), indium tin zinc oxide (ITZO) ), zinc oxide, cadmium oxide, hafnium oxide (HfO), indium gallium zinc oxide (InGaZnO), indium gallium zinc magnesium oxide (indium gallium zinc magnesium oxide, InGaZnMgO), indium gallium magnesium oxide (InGaMgO) or indium gallium aluminum oxide (InGaAlO).

As shown in FIG. 1a, the display unit 130 is located on the lower surface 112 of the first polarizing layer. The first polarizing layer 110 and the display unit 130 may further be combined by a bonding layer 140. . The material of the bonding layer 140 can be, for example, an optical glue or a water glue or a solid glue, but is not limited thereto.

In the touch display structure of the present invention, the plurality of sensing structures are directly disposed on the upper surface of the first polarizing layer without setting a substrate, which can significantly reduce the manufacturing cost, omit the process steps, and have the effect of making the product lighter and thinner. Therefore, the present invention has the advantages of thin device, superior touch sensitivity, low manufacturing cost, and high production yield.

As shown in the second embodiment of FIG. 2 , the touch display structure also includes a first polarizing layer 210 , a plurality of sensing structures 220 , and a display unit 230 . The display unit 230 further includes a second polarizing layer 231 . The backlight unit 232 is polarized by the backlight unit 232 and transmitted through the second polarizing layer 231 and the first polarizing layer 210 to achieve a display effect. The main structure of the second polarizing layer 231 can be, for example, a PET (polyethylene terephthalate) protective film, a PSA (pressure-sensitive adhesive), and a TAC (three Cellulose acetate), PVA (polyvinyl alcohol) and PET (polyethylene terephthalate) release film, etc., are not limited thereto.

As shown in the third embodiment of FIG. 3 , the touch display structure also includes a first polarizing layer 310 , a plurality of sensing structures 320 , and a display unit 330 . The display unit 330 includes a second polarizing layer 331 . A backlight unit 332 and a liquid crystal unit 333 are disposed between the first polarizing layer 310 and the second polarizing layer 331 and are polarized by the backlight unit 332 and transmitted through the second polarizing layer 231 and the first polarizing layer 310. The display effect is further provided, and the liquid crystal display unit 333 further has a liquid crystal display effect.

As shown in the fourth embodiment of FIG. 4 , the touch display structure also includes a first polarizing layer 410 , a plurality of sensing structures 420 , and a display unit 430 . The display unit 430 includes a second polarizing layer 431 . A backlight unit 432, a liquid crystal unit 433, and a bottom layer 434. The liquid crystal unit 333 is disposed between the bottom layer 434 and the second polarizing layer 431, and is adhered between the first polarizing layer 410 and the bottom layer 434 by using a bonding layer 440. To form a combination of the first polarizing layer 410 and the display unit 430.

In the above embodiment, the touch display structure further has a cover layer on the complex sensing structure. As shown in FIG. 5, the first embodiment is used as an example. The cover 550 is overlaid on the plurality of sensing structures 520. Providing a protective effect, wherein the cover layer 550 may be made of PET (polyethylene terephthalate), plastic, polyester polymer, polyfluorene polymer, glass, polymethyl methacrylate, polycarbonate. Or polyimine, but not limited to this. Furthermore, in the embodiment shown in the figure, the combination of the plurality of sensing structures 520 and the cover layer 550 may be further formed by a bonding layer 540.

Please refer to FIGS. 6a to 6d for a schematic diagram of a manufacturing method of the touch display structure of the present invention. First, a first polarizing layer 610 is provided. As shown in FIG. 6a, the first polarizing layer 610 has an opposite upper surface 611 and a lower surface 612; the material of the first polarizing layer 610 can be, for example, PET (polyethylene terephthalate). Diester) protective film, PSA (pressure-sensitive adhesive), TAC (triacetate), PVA (polyvinyl alcohol) and PET (polyethylene terephthalate) release film, etc., are not limited thereto.

Forming a plurality of sensing structures on the upper surface of the first polarizing layer, as shown in FIG. 6b; forming a transparent conductive layer 661 and a metal layer 662 on the upper surface 611 of the first polarizing layer 610, wherein the transparent conductive layer 661 is, for example, The metal oxide, the nano silver wire or the nano conductive metal, the metal oxide may be, for example, indium tin oxide (ITO), indium zinc oxide (IZO), or cadmium tin oxide. , CTO), aluminum zinc oxide (AZO), indium tin zinc oxide (ITZO), zinc oxide, cadmium oxide, hafnium oxide (HfO) Indium gallium zinc oxide (InGaZnO), indium gallium zinc magnesium oxide (InGaZnMgO), indium gallium magnesium oxide (InGaMgO) or indium gallium aluminum (indium gallium aluminum) Oxide, InGaAlO), etc.). Metal layer 662 can be, for example, at least one layer of conductive metal, or a plurality of layers of conductive metal. The material may be a conductive metal or a conductive alloy such as a copper alloy, an aluminum alloy, gold, silver, aluminum, copper or molybdenum. The structure of the multi-layer conductive metal layer may be, for example, a stacked structure of a molybdenum layer/aluminum layer/molybdenum layer, or may be a conductive metal or a conductive alloy selected from the group consisting of copper alloy, aluminum alloy, gold, silver, aluminum, copper, molybdenum, and the like. A multi-layer conductive metal layer structure stacked with a plurality of materials. The method of forming the transparent conductive layer 661 and the metal layer 662 may be, for example, sputtering, vapor deposition, vacuum ion plating, electroplating, physical vapor deposition (PVD), chemical vapor deposition (CVD), or the like.

Then, patterning is further applied. As shown in FIG. 6c, the patterning process may adopt a roll-to-roll yellow process or a roll-to-roll laser process, preferably a roll-to-roll yellow process, and the above-mentioned multilayer is transparent. The stacked structure performs a first yellow light process to pattern the transparent conductive layer 661 and the metal layer 662. The first yellow light process includes forming a patterned photoresist layer (not shown) on the metal layer 662, and the material of the photoresist layer is liquid. Photoresist or dry film photoresist. Then, an etching step is performed to remove the transparent conductive layer 661 and the metal layer 662 which are not protected by the photoresist layer, and to remove the patterned photoresist layer. Then, a second yellow light process is performed to remove a portion of the metal layer on the transparent conductive layer 661 to form a first transparent sensing series 621 and a first peripheral line 622 connected to each other, and on the surface of the first polarizing layer 610. The sensing structure 620 is formed. In the embodiment shown in the figure, the first peripheral line 622 is located at the peripheral frame edge of the first polarizing layer 610 and is in contact with the first transparent sensing series 621 to form an electrical connection.

The first polarizing layer 610 is further adhered to a display unit 630. In the embodiment shown in FIG. 6d, a bonding layer 640 can be used to bond the first polarizing layer 610 and the display unit 630 to complete the bonding. The touch display structure of the present invention. Wherein, the bonding layer may be firstly attached to the lower surface of the first polarizing layer in a roll-to-roll manner, and then the display unit is pasted on the lower surface of the first polarizing layer by the bonding layer; or, the bonding layer may be first applied The film is attached to the display unit in a roll-to-roll manner, and the first polarizing layer is adhered to the display unit by a bonding layer, and the material of the bonding layer can be, for example, an optical glue or a water glue or a solid glue. Not limited to this.

Please refer to FIGS. 7a to 7d for a schematic view showing a manufacturing method of the touch display structure according to the second embodiment of the present invention. The first polarizing layer 710 is completed by the above process, the first polarizing layer 710 has a sensing structure 720, as shown in Figure 7a, having a plurality of interconnected first transparent sensing series 721 and a first peripheral line 722; Further, a liquid crystal unit 733 is provided, as shown in FIG. 7b, and a second polarizing layer 731 is attached under a liquid crystal unit 733; as shown in FIG. 7c, a backlight unit 732 is further disposed on the second polarizing layer 731. The display unit 730 is completed; the main structure of the second polarizing layer 731 is, for example, a PET (polyethylene terephthalate) protective film, a PSA (pressure-sensitive adhesive), and a TAC (triacetate). ), PVA (polyvinyl alcohol) and PET (polyethylene terephthalate) release film, etc., but not limited to this; finally, as shown in Figure 7d, the first polarizing layer 710 is attached Above the liquid crystal unit 733, as shown in the figure In the embodiment, a bonding layer 740 is adhered between the first polarizing layer 710 and the liquid crystal cell 733 to form a combination of the first polarizing layer 710 and the display unit 730 to complete the touch display of the present invention. structure.

Please refer to FIGS. 8a to 8e for a schematic view showing a manufacturing method of the touch display structure according to the third embodiment of the present invention. First, a liquid crystal unit 833 is provided, as shown in FIG. 8a, and a second polarizing layer 831 is attached under a liquid crystal unit 833; as shown in FIG. 8b, a backlight unit 832 is further disposed on the second polarizing layer 831. The display unit 830 is completed to form a first polarizing layer 810 having an upper surface 811 as shown in FIG. 8c; and a complex sensing structure is formed on the upper surface 811 of the first polarizing layer, wherein For the process of forming the complex sensing structure, referring to the process steps of the first embodiment, the first transparent sensing series 821 and the first peripheral line 822 may be formed on the first polarizing layer upper surface 811; finally, The first polarizing layer 810 is bonded to the liquid crystal cell 833. In the embodiment shown in FIG. 8d, a bonding layer 840 is adhered between the first polarizing layer 810 and the liquid crystal cell 833 to form a first A polarizing layer 810 is combined with the display unit 830 to complete the touch display structure of the present invention.

Furthermore, in the embodiment of the manufacturing method, a cover layer may be further formed on the sensing structures to provide a protective effect. For example, in the first embodiment, a bonding layer 940 is utilized in FIG. The contact between the sensing structure 920 and the cover layer 950 is formed to form a combination of the sensing structure 920 and the cover layer 950. The material of the cover layer 950 may be PET (polyethylene terephthalate), plastic, and poly. Ester polymer, polyfluorene polymer, glass, polymethyl methacrylate, polycarbonate or polyimine, but not limited to this.

Although the present invention has been disclosed above by way of example, it is not intended to limit the invention. Anyone skilled in the art, without departing from the spirit and scope of the invention, The scope of protection of the present invention is subject to the definition of the scope of the patent application.

110‧‧‧First polarizing layer

111‧‧‧Upper surface

112‧‧‧ lower surface

120‧‧‧Sensor structure

121‧‧‧First transparent sensing series

122‧‧‧First perimeter line

130‧‧‧Display unit

140‧‧‧Fitting layer

Claims (10)

A touch display structure comprising: a first polarizing layer having an upper surface; a plurality of sensing structures on the upper surface of the first polarizing layer; and a display unit located below the first polarizing layer. The touch display structure of claim 1, wherein the display unit further comprises a second polarizing layer and a backlight unit, wherein the backlight unit emits light through the second polarizing layer and the first polarizing layer to polarize display effect. The touch display structure of claim 2, the display unit further comprising a liquid crystal cell, the liquid crystal cell being located between the first polarizing layer and the second polarizing layer. The touch display structure according to any one of claims 1 to 3, further comprising a cover layer on the sensing structures. A method for manufacturing a touch display structure, comprising: forming a first polarizing layer having an upper surface; forming a plurality of sensing structures on the upper surface of the first polarizing layer; and bonding the first polarizing layer to Above a display unit. The method for manufacturing a touch display structure according to claim 5, further comprising forming a cover layer on the sensing structures. A method for manufacturing a touch display structure, comprising: forming a first polarizing layer having an upper surface; Forming a plurality of sensing structures on the upper surface of the first polarizing layer; providing a liquid crystal cell; bonding a second polarizing layer under a liquid crystal cell; and providing a backlight unit under the second polarizing layer; The first polarizing layer is attached to the liquid crystal cell. The method for manufacturing a touch display structure according to claim 7, further comprising forming a cover layer on the sensing structures. A method for manufacturing a touch display structure, comprising: bonding a second polarizing layer under a liquid crystal cell; providing a backlight unit under the second polarizing layer; forming a first polarizing layer having an upper surface Forming a complex sensing structure on the upper surface of the first polarizing layer; and bonding the first polarizing layer on the liquid crystal cell. The method for manufacturing a touch display structure according to claim 9, further comprising forming a cover layer on the sensing structures.