JP2010262199A - Display, and method of manufacturing the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a display made by adhering the function panels, such as a barrier panel and a touch panel high in transmissivity and adhesion strength, to the display panel surface, and a method for manufacturing the display. <P>SOLUTION: The display 10A has a structure stacking a display panel (liquid crystal display panel) 11 and a function panel (barrier panel) 12, and the display panel 11 and the function panel 12 are adhered to each other at whole of the display area and non-display area by using an adhesive 13. At least only one of non-display areas of the display panel 11 and the function panel 12 is roughened at the adhering surfaces F1, F2. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

The present invention relates to a display device in which a functional panel such as a barrier panel or a touch panel is bonded to the surface of the display panel, and a manufacturing method thereof.

Flat panel display (FPD) is a cathode ray tube (CRT).
Compared with mobile phone devices for display, it is lightweight, thin, and has low power consumption.
It is used in many electronic devices such as personal computers, televisions, and navigation devices. As these FPDs, display devices such as a liquid crystal display panel, an organic EL (electroluminescence) display panel, a plasma display panel, and a field emission display are known.

And in order to add a function to these display apparatuses or to improve the function of a display apparatus, the display apparatus with which the functional panel was laminated | stacked on the display surface of the display apparatus is marketed. As examples of this functional panel, a barrier panel as disclosed in Patent Document 1 below, a touch panel as disclosed in Patent Document 2 below, and the like are known.

Among these, the barrier panel has a parallax barrier that displays a first image and a second image in which sub-pixels are alternately adjacent to each other so as to be distinguishable in different viewing directions by shading of the slits. With the function of the parallax barrier, it is possible to perform 3D display of a stereoscopic image and two-screen display that displays separate images in the left viewing direction and the right viewing direction. As a two-screen display device, a navigation device that displays, for example, a navigation image in the direction of the driver's seat and a television image or a DVD image in the direction of the passenger seat is known from the viewpoint of traffic safety. .

JP 2008-009189 A JP 2007-128129 A JP-A-2005-039109 JP 2005-159143 A

As a method of holding these functional panels on the display surface of the display device, from the viewpoint of maintaining the holding force and suppressing misalignment during use, it is not a fixing method using an adhesive such as a double-sided tape,
Many fixing methods using an adhesive are employed. However, for example, the thickness of the glass substrate of the touch panel is as thin as 0.1 mm to 0.2 mm in order to obtain good operability. Moreover, the thickness of the glass substrate of the barrier panel is very thin, for example, about 0.05 mm or less, for example, in order to obtain a good viewing angle. For this reason, in order to raise the adhesive strength between a barrier panel and a display apparatus, the glass substrate of a barrier panel cannot be pressed strongly at the time of adhesion | attachment.

Thus, in order to increase the adhesive strength between the barrier panel and the display device, a method of roughening the respective adhesive surfaces as described in Patent Document 3 can be considered. As a roughening method, as described in Patent Document 4, frost processing, sand blasting, dry etching, and the like are known. However, when the display surface is roughened, the display device has a problem of impairing display characteristics such as transmittance.

The present invention has been made to solve such problems of the prior art, and is intended to improve the adhesion of the functional panel by roughening only the necessary portions of the display device without impairing the display characteristics. With the goal.

In order to achieve the above object, a display device of the present invention is a display device having a structure in which a display panel and a functional panel are laminated, and the display panel and the functional panel have a display area and a non-display area. Only the non-display area of at least one of the display panel and the functional panel is roughened by being bonded with an adhesive.

In the conventional display device, since the entire surface of at least one of the display panel and the functional panel is roughened, the adhesive strength between the display panel and the functional panel is strong, so that a positional shift during use is unlikely to occur. However, if the display area is roughened, it is difficult to secure sufficient transmittance due to light scattering even if the roughened portion is filled with an adhesive. On the other hand, according to the display device of the present invention, the display panel and the functional panel are bonded to the entire display area and the non-display area with the adhesive, but at least one non-display area of the display panel and the functional panel. In addition, since the surface is roughened, the adhesive strength between the display panel and the functional panel can be secured in the roughened portion of the non-display area, and light scattering occurs because the display area is not roughened. Is suppressed,
A display device having sufficient light transmittance is obtained.

In the display device of the present invention, the functional panel may be a touch panel, a barrier panel that enables a plurality of images to be distinguished in different viewing directions, or a barrier panel for 3D display.

If these functional panels are glass substrates of touch panels, the thickness is 0.1 mm to 0.2 mm.
If the glass substrate of the barrier panel is about 0.1 mm, the thickness is as thin as 0.1 mm or less, but even such a thin functional panel can be attached to the surface of the display panel with high strength. it can.

Furthermore, in order to achieve the above object, the display device manufacturing method of the present invention includes a display panel and a functional panel laminated, and the display panel and the functional panel are bonded to the entire display area and non-display area with an adhesive. A display device manufacturing method, comprising:
A step of roughening only the non-display area of at least one of the display panel and the functional panel;
A step of applying an adhesive over the entire surface of at least one of the display panel and the functional panel;
Bonding the display panel and the functional panel through the adhesive;
It is characterized by having.

According to the method for manufacturing a display device of the present invention, it is easy to manufacture a display device having a sufficient light transmittance in which the adhesive strength between the display panel and the functional panel is strong and light scattering in the display region is suppressed. Will be able to.

In the method for manufacturing a display device according to the present invention, the step of roughening only the non-display area of at least one of the display panel and the functional panel may include at least one display area of the display panel and the functional panel. After forming a protective layer on the entire surface, it is preferable to include a step of roughening only the non-display area and then peeling the protective layer.

In the display device manufacturing method of the present invention, since the entire display area of at least one of the display panel and the functional panel is covered with the protective layer, the display area is not roughened when the non-display area of these panels is roughened. There is no damage. Therefore, according to the display device manufacturing method of the present invention, it is possible to manufacture a display device having sufficient light transmittance in which light scattering in the display region is further suppressed.

In addition, as a protective layer, a photosensitive resin material, a thermosetting resin material, etc. can be suitably selected and used according to the roughening method. Further, in the step of roughening only the non-display area of at least one of the display panel and the functional panel, mass production can be easily performed by appropriately using a frost processing method, a sand blast method, a dry etching method, or the like.

Moreover, in the manufacturing method of the display apparatus of this invention, it is preferable that the said roughening process is a frost processing process.

The frost processing method is a chemical roughening method in which the surface of the glass substrate is roughened into a cloudy glass shape by hydrofluoric acid treatment, so that the portion covered with the protective layer is not roughened, only the necessary portion. It can be roughened accurately. Therefore, according to the method for manufacturing a display device of the present invention, it is possible to manufacture a display device having the above-described effect in which only a necessary portion is roughened with high accuracy.

It is a figure which shows the pixel structure of the 2 screen liquid crystal display device which concerns on 1st Embodiment. It is a figure which shows the synthesis | combination of 2 screens input into a liquid crystal panel. It is a figure which shows opening of a parallax barrier. FIG. 4A is a diagram showing the principle of display of two screens, and FIG. 4B is a diagram showing luminance characteristics with respect to the viewing angle of two screens. FIG. 5A is a plan view showing a surface roughening region of the two-screen liquid crystal display device according to the first embodiment, and FIG. 5B is a cross-sectional view taken along line VB-VB in FIG. 5B. It is a top view which shows 1 pixel of the 2 screen liquid crystal display device which concerns on 1st Embodiment. 7A is a cross-sectional view taken along line VIIA-VIIA in FIG. 6, and FIG. 7B is a cross-sectional view taken along line VIIB-VIIB in FIG. It is a flowchart of the manufacturing process of the 2 screen liquid crystal display device which concerns on 1st Embodiment. It is sectional drawing corresponding to FIG. 5B which shows the modification of 1st Embodiment. FIG. 10A is a plan view showing a surface roughening treatment area of the display device according to the second embodiment, and FIG. 10B is an exploded perspective view showing electrodes of the touch panel. 11A is a cross-sectional view taken along line XA-XA in FIG. 10A, and FIG. 11B is a cross-sectional view taken along line XIB-XIB in FIG. 10A.

Hereinafter, an embodiment of the present invention will be described with reference to the drawings, taking as an example a case of a two-screen liquid crystal display device provided with a barrier panel that can distinguish a plurality of images in different viewing directions. However, the embodiments described below are not intended to limit the present invention to those described herein, and the present invention has been variously modified without departing from the technical idea shown in the claims. It can be equally applied to things. In each drawing used for the description in this specification, each layer and each member are displayed in different scales so that each layer and each member can be recognized on the drawing. However, it is not necessarily displayed in proportion to the actual dimensions.

[First Embodiment]
First, the principle of two-screen display in the two-screen liquid crystal display device 10A of the first embodiment will be described with reference to FIGS. The two-screen liquid crystal display device 10A shown in FIGS. 1 to 7 is an example of a navigation device, and the image is displayed so that the first image (navigation image) can be seen when viewed from the right direction (driver's seat direction). It is assumed that the image is displayed so that the second image (television image or DVD image) can be seen when viewed from the left direction (passenger seat direction).

The two-screen liquid crystal display device 10A has an FFS (Fringe Field Switching) mode liquid crystal display panel 11 which is a horizontal electric field method. As shown in FIG. 5B, a barrier panel 12 is ultraviolet curable on the front surface of the liquid crystal display panel 11. The adhesive 13 is attached. As shown in FIG. 5A, the liquid crystal display panel 11 has a display area and a non-display area on the peripheral side of the display area. In the non-display area, the array substrate AR and the color filter substrate CF sandwiching the liquid crystal layer LC are provided.
Sealing material 14 for connecting the terminals, driver terminals provided on the array substrate AR (not shown)
In addition, terminals for flexible printed circuit boards, wiring to the respective terminals, and the like are provided.

As shown in FIG. 1, display pixels are formed in a matrix in the display area. For example,
In the WVGA type for color display, 800 pixels are formed in the row direction (scanning line 20 direction described later) in FIG. 1 and 480 pixels are formed in the column direction (signal line 25 direction described later). One pixel is R (red) and G
It consists of three sub-pixels of (green) and B (blue), and is controlled so that the color of one pixel becomes a predetermined color by controlling the luminance of each of the R, G, and B light primary colors. Further, this two-screen liquid crystal display device 1
At 0A, as shown in FIG. 2, a composite image of the first image and the second image is input to the liquid crystal display panel 11. The synthesis of the first image and the second image is performed by selecting the first image and the second image in a checkered pattern.

As shown in FIG. 3, the parallax barrier layer 15, which is a light shielding film of the barrier panel 12, has a rectangular opening 1.
6. The opening 16 is disposed between a pair of sub-pixels adjacent in the row direction. As shown in FIG. 4A, the opening 16 of the parallax barrier layer 15 allows the first image to be viewed from the driver seat direction but not from the passenger seat direction, and the second image to be viewed from the passenger seat direction. It can be seen from the driver's seat direction.

Thus, in the two-screen liquid crystal display device 10A, the composite image of the first image and the second image displayed on the liquid crystal display panel 11 can be separately determined in different directions by the barrier panel 12. . The two-screen liquid crystal display device 10A is installed between the driver seat and the passenger seat, and is designed, for example, with the driver seat direction set to 30 degrees to the right and the passenger seat direction set to 30 degrees to the left. Therefore, this two-screen liquid crystal display device 10A has a viewing angle of −30 as shown in FIG. 4B.
It is designed so that the brightness is maximized when the angle is +30 degrees.

Next, the configuration of each sub-pixel of the two-screen liquid crystal display device 10A will be described with reference to FIGS. In the two-screen liquid crystal display device 10A according to the first embodiment, the barrier panel 12 is attached to the front surface of the liquid crystal display panel 11 with an adhesive 13 that is cured by ultraviolet rays. The liquid crystal display panel 11 includes a liquid crystal layer LC, a rear array substrate AR sandwiching the liquid crystal layer LC, and a front color filter substrate CF. The thickness of the liquid crystal layer LC is uniformly maintained by a columnar spacer formed from a photosensitive resin material. A first polarizing plate 17 is formed on the back surface of the array substrate AR, and a second polarizing plate 18 is formed on the front surface of the barrier panel 12. Further, light is irradiated from the back side of the first polarizing plate 17 by a backlight (not shown).

As shown in FIGS. 6 and 7, the liquid crystal display panel 11 has a configuration in which the liquid crystal layer LC is sandwiched between the array substrate AR and the color filter substrate CF. The array substrate AR is thin (for example, 0.
5 mm) transparent substrate 1 made of glass, quartz, plastic, etc.
9 is used as a base. On the first substrate body 19, as shown in FIG. 6, on the side facing the liquid crystal layer LC, the scanning line 20 made of opaque metal such as aluminum or molybdenum and the common electrode wiring 2
1 is formed in the X-axis direction (row direction). A gate electrode G extends from the scanning line 20 to the lower left of each sub-pixel in FIG. 6, and the common electrode wiring 21 is made of a transparent conductive material such as ITO (Indium Thin Oxide) or IZO (Indium Zinc Oxide). The lower electrode 22 is electrically connected. The lower electrode 22 is formed in a wide range at the center of the sub-pixel and operates as a common electrode.

A transparent gate insulating film 23 made of silicon nitride, silicon oxide or the like is laminated so as to cover the scanning line 20 and the gate electrode G. A semiconductor layer 24 made of amorphous silicon, polycrystalline silicon, or the like is formed on the gate insulating film 23 overlapping the gate electrode G in plan view. On the gate insulating film 23, a plurality of signal lines 25 made of a metal such as aluminum or molybdenum are formed on the left side of each sub-pixel in the Y-axis direction (column direction) in FIG. A source electrode S extends from the signal line 25, and the source electrode S is in partial contact with the surface of the semiconductor layer 24.

Further, a drain electrode D formed simultaneously with the same material as the signal line 25 and the source electrode S is provided on the gate insulating film 23, and the drain electrode D is disposed in proximity to the source electrode S and the semiconductor layer 24. Partially touching. A region surrounded by the scanning line 20 and the signal line 25 corresponds to one sub-pixel region. Since one pixel is substantially square, the sub-pixel that divides the pixel into three equals a rectangle with the scanning line 20 having a short side and the signal line 25 having a long side. The gate electrode G, the gate insulating film 23, the semiconductor layer 24, the source electrode S, and the drain electrode D constitute a thin film transistor TFT serving as a switching element, and this TFT is formed in each subpixel.

Further, a transparent passivation film 26 made of, for example, silicon nitride or silicon oxide is laminated so as to cover the exposed portions of the signal line 25, the TFT, and the gate insulating film 23. Then, in order to cover the passivation film 26, ITO (Indium Thin Oxide) or I
An upper electrode 27 made of a transparent conductive material such as ZO (Indium Zinc Oxide) is formed.
As shown in FIG. 6, the upper electrode 27 has a plurality of slits 28 formed in parallel, and the upper electrode 27 operates as a pixel electrode. The slit 28 has an oval shape, and the longitudinal direction thereof is inclined to the right by, for example, 5 degrees with respect to the extending direction of the scanning line 20.

A contact hole 29 that penetrates the passivation film 26 and reaches the drain electrode D is formed, and the upper electrode 27 and the drain electrode D are electrically connected through the contact hole 29. A first alignment film 29 made of, for example, polyimide is laminated so as to cover the upper electrode 27. The first alignment film 30 is subjected to a liquid crystal direction alignment process (hereinafter referred to as a rubbing process) in parallel with the extending direction of the scanning lines 20. The alignment of the liquid crystal molecules in the liquid crystal layer LC is changed by the electric field between the lower electrode 22 and the upper electrode 27 at a position corresponding to the slit 28.

The color filter substrate CF is based on a second substrate body 31 made of glass, quartz, plastic, or the like having a very thin transparent insulating property of 0.1 mm or less (eg, 0.05 mm). The second substrate body 31 is formed with a light shielding layer 32 and a color filter layer 33 that transmits different color light (R, G, B) for each sub-pixel. The light shielding layer 32 is an opaque region,
It is formed so as to overlap with opaque portions such as scanning lines 20, signal lines 25, and TFTs in the display area in plan view, and the light shielding layer 32 is formed in the entire non-display area of the color filter substrate CF. The light shielding layer 32 in the display area is a scanning line 2 that divides the sub-pixels into a matrix.
It is also called a black matrix because it is formed by overlapping 0 and the signal line 25.

The color filter layer 33 is formed in a region where the light shielding layer 32 of the sub-pixel is not formed. An overcoat layer 34 made of a transparent resin material such as a photoresist is laminated so as to cover the light shielding layer 32 and the color filter layer 33. This overcoat layer 3
4 is formed to flatten the steps due to the color filter layers 33 of different colors and to block impurities flowing out from the light shielding layer 32 and the color filter layer 33 from entering the liquid crystal layer LC. A second alignment film 35 made of, for example, polyimide is formed so as to cover the overcoat layer 34. The second alignment film 35 is rubbed in the direction opposite to that of the first alignment film 30.

The array substrate AR and the color filter substrate CF thus formed are opposed to each other, the sealing material 14 is provided around both the substrates, the two substrates are bonded together, and the first substrate is filled with liquid crystal between the two substrates. The liquid crystal display panel 11 according to the embodiment is obtained. Note that columnar spacers (not shown) for holding the liquid crystal layer LC at a predetermined thickness are formed on the color filter substrate CF.

With the above configuration, when the TFT is turned on and a voltage is applied between the lower electrode 22 and the upper electrode 27, an electric field is generated between the electrodes 22 and 27, and the alignment of the liquid crystal molecules in the liquid crystal layer LC changes. As a result, the light transmittance of the liquid crystal layer LC changes and an image is displayed. The auxiliary capacitor is formed by the lower electrode 22, the upper electrode 27, and the passivation film 26, and the thin film transistor TFT
When is turned OFF, the electric field between the electrodes 22 and 27 is held for a predetermined time.

The barrier panel 12 is a thin glass (quartz, for example, 0.5 mm) having a transparent insulating property,
A third substrate body 36 made of plastic or the like is used as a base. The third substrate body 36 is formed with a parallax barrier 15 that displays a first image and a second image in which sub-pixels are alternately adjacent to each other so as to be distinguishable in different viewing directions by shading of the openings 16.

FIG. 8 is a flowchart showing the bonding process between the barrier panel 12 and the liquid crystal display panel 11. The display area (see FIG. 5A) of the adhesion surface of the second substrate body 31 of the color filter substrate CF of the liquid crystal display panel 11 is masked with a protective layer such as a laminate material (S1-A).
Next, the adhesion surface of the non-display area of the second substrate body 31, that is, the portion not masked with a protective layer such as a laminate material is roughened by a frost processing method using a hydrofluoric acid aqueous solution (S2- A).

This frost processing method is a chemical surface roughening method in which the surface of the glass substrate is roughened by hydrofluoric acid treatment, so that the portions covered with the protective layer are not roughened, and only the necessary portions are accurately obtained. Since the surface can be roughened, only the part required for high accuracy can be roughened, but if it is not necessary to roughen the surface with high accuracy, it can be performed by other methods such as sandblasting or dry etching. It may be broken. When the roughening process is finished, the masking of the display area of the adhesive surface of the second substrate body 31 is removed (S3-A). As a result, the display area of the second substrate body 31 is not roughened, and the adhesive surface F1 of the non-display area of the second substrate body 31 is roughened, resulting in a rough surface.

Similar to the liquid crystal display panel 11, the display area of the adhesive surface of the third substrate body 36 of the barrier panel 12 is masked with, for example, a laminate film (S1-B). Next, the third substrate body 3
6 is roughened by a frost processing method (S2-B). When the roughening process is finished, the masking of the display area on the adhesive surface of the third substrate body 36 is removed (S3-B). As a result, the bonding surface of the display area of the third substrate body 36 is not roughened, and the bonding surface F2 of the non-display area of the third substrate body 36 is roughened, resulting in a rough surface.

Next, for example, a UV curable epoxy adhesive 13 is applied to the entire adhesion surface (both the display area and the non-display area) of the second substrate body 31 of the color filter substrate CF by drawing (S).
4-A). The adhesive 13 may be applied to the third substrate body 36. Next, the second substrate body 31 of the color filter substrate CF and the third substrate body 36 of the barrier panel 12 are bonded together in a vacuum (S5). Next, ultraviolet rays (UV) are applied to the adhesive to cure the adhesive 13 (S6).

In the two-screen liquid crystal display device 10A thus manufactured, since the display area is not roughened, display characteristics such as transmittance are not impaired, and the non-display area is roughened. Since the processed bonding surfaces F1 and F2 are formed, the bonding area with the adhesive increases, and the bonding strength increases. Epoxy adhesive strengths are mainly hydrogen bonds and van der Waals intermolecular forces and mechanical bonds. If the bonding surfaces F1 and F2 are rough, the area where the molecules approach is particularly increased and the intermolecular force is increased, and the anchor effect is increased and the mechanical bond is increased.

As shown in FIG. 9, a protective film 37 made of a transparent resin material such as a photoresist may be formed so as to cover the parallax barrier 15 of the barrier panel 12. The protective film 37 is formed to prevent the parallax barrier 15 from being damaged and to flatten the level difference caused by the parallax barrier 15. Thus, when the protective film 37 is formed, the adhesive surface F2 in the non-display area of the protective film 37 may be roughened by sandblasting or the like as in the third substrate body 36.

[Second Embodiment]
Next, a display device 10B according to the second embodiment will be described with reference to FIGS. However, in FIG. 10, FIG. 11, the same referential mark is attached | subjected to the component same as the display apparatus 10A of 1st Embodiment, and the detailed description is abbreviate | omitted. The display device 10B according to the second embodiment corresponds to a display device 10A according to the first embodiment in which the barrier panel 12 is replaced with a touch panel 38.

As shown in FIGS. 11A and 11B, the touch panel 38 is disposed so as to face the spacer 39.
The fourth substrate body 40 on the back side and the fifth substrate body 41 on the front side are bonded together. Each of the fourth substrate body 40 and the fifth substrate body 41 is made of transparent insulating glass, quartz, plastic, or the like, and has a thickness of 0.1 mm to 0.2 mm in order to obtain good operability. On the fourth substrate body, an X-axis electrode 42 made of a transparent conductive material such as ITO (Indium Thin Oxide) or IZO (Indium Zinc Oxide) is formed on the entire display area.

As shown in FIG. 10A, the X-axis electrode 43 having a low resistance at both ends in the X-axis direction of the X-axis surface electrode 42,
43 and a plurality of terminals 44 arranged in a matrix and extending in the direction of the fifth substrate body 41 are formed. The fifth substrate body 41 includes ITO (Indium Thin Oxide) or IZO (Indiu).
m Zinc Oxide) or the like, a Y-axis surface electrode 45 made of a transparent conductive material is formed on the entire display area. In addition, low-resistance Y-axis electrodes 46 and 46 are formed at both ends of the Y-axis surface electrode 45 in the Y-axis direction. The second polarizing plate 18 is formed on the front side of the fifth substrate body 41 of the touch panel 38,
A protective film 47 made of hard coat is formed on the second alignment film 35.

Next, an input operation on the touch panel 38 will be described. A predetermined voltage is alternately and repeatedly applied to the X-axis electrodes 43 and 43 positioned at both ends in the X-axis direction and the Y-axis electrodes 46 and 46 positioned at both ends in the Y-axis direction. When the terminal 44 and the Y-axis surface electrode 45 are brought into contact with each other by pressing with a touch pen or the like, when a voltage is applied to the X-axis electrodes 43 and 43, the X corresponding to the pressed part is caused by a uniform voltage drop in the X-axis direction. The axial position is measured, and when a voltage is applied to the Y-axis electrodes 46, 46, the Y-axis position corresponding to the pressed part is measured by the uniform voltage drop in the Y-axis direction.

As shown in FIGS. 10 and 11, similarly to the third substrate main body 36 of the barrier panel 12 of the first embodiment, the adhesion surface F <b> 2 of the non-display area of the fourth substrate main body on the back side is roughened. Yes. As described above, the present invention can be applied to a touch panel display device having a weak adhesion pressure of 0.1 mm to 0.2 mm.

In the above-described embodiment, an example is shown in which only the non-display area of both substrates to be bonded is roughened, but only the non-display area of only one of the substrates is roughened. If so, the above-described effects can be achieved. The display device of the above-described embodiment is F.
Although this is an example of an FS mode liquid crystal display panel, the present invention is not limited to this, and is applicable to an IPS mode or vertical electric field type liquid crystal display panel, an organic EL display panel, a plasma display panel, a field emission display, and the like. Can do.

DESCRIPTION OF SYMBOLS 10A, 10B ... Display apparatus 11 ... Liquid crystal display panel 12 ... Barrier panel 13 ... Adhesive 14 ... Sealing material 15 ... Parallax barrier layer 16 ... Opening 17 ... 1st polarizing plate 18 ... 2nd
Polarizing plate 19 ... first substrate body 20 ... scanning line 21 ... common electrode wiring 22 ... lower electrode 23
... Gate insulating film 24 ... Semiconductor layer 25 ... Signal line 26 ... Passivation film 27 ... Upper electrode 28 ... Slit 29 ... Contact hole 30 ... First alignment film 31 ... Second substrate body 32 ... Light shielding layer 33 ... Color filter layer 34 ... Overcoat layer 35 ... second alignment film 36 ... third substrate body 37 ... protective film 38 ... touch panel 39 ... spacer 4
DESCRIPTION OF SYMBOLS 0 ... 4th board | substrate body 41 ... 5th board | substrate body 42 ... X-axis surface electrode 43 ... X-axis line electrode 44 ...
Terminal 45 ... Y axis electrode 46 ... Y axis electrode 47 ... Protective film AR ... Array substrate CF ...
Color filter substrate F1, F2 ... Adhesive surface

Claims (5)

A display device having a structure in which a display panel and a functional panel are laminated,
The display panel and the functional panel are bonded to the entire display area and non-display area with an adhesive,
Only the non-display area of at least one of the display panel and the functional panel is roughened. The display device according to claim 1, wherein the functional panel is a touch panel, a barrier panel that enables a plurality of images to be distinguished in different viewing directions, or a barrier panel for 3D display. A display panel and a functional panel are laminated, and the display panel and the functional panel are a manufacturing method of a display device in which the entire display area and non-display area are bonded with an adhesive,
A step of roughening only the non-display area of at least one of the display panel and the functional panel;
A step of applying an adhesive over the entire surface of at least one of the display panel and the functional panel;
Bonding the display panel and the functional panel through the adhesive;
A method for manufacturing a display device, comprising: The step of roughening only the non-display area of at least one of the display panel and the functional panel,
The method includes a step of forming a protective layer on the entire surface of at least one of the display panel and the functional panel, roughening only the non-display region, and then peeling the protective layer. Item 5. A method for manufacturing a display device according to Item 4. The method for manufacturing a display device according to claim 4, wherein the roughening step is a frosting step.

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