JP2003050393A - Electrooptical device, tape and method for assembling electrooptical device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an electrooptical device having excellent display characteristics and efficiently manufactured, an adhesive tape and a method for assembling the electrooptical device using the adhesive tape. SOLUTION: A liquid crystal device 1 is provided with a liquid crystal panel 100, a backlight 200 and an adhesive sheet 320 with a picture frame shape disposed between the liquid crystal panel 100 and the backlight 200 and sticking them together. In this way, because a closed space is formed with the adhesive sheet 320, the liquid crystal panel 100 and the backlight 200 by disposing the adhesive sheet 320 with the picture frame shape, no foreign matter such as dust enters the inside of the closed space and a problem such as deterioration of the display characteristics due to mixing of the foreign matter such as the dust does not exist.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electro-optical device that uses an electro-optical panel such as a liquid crystal panel to display light from a backlight.

[0002]

2. Description of the Related Art An electro-optical device includes an electro-optical panel such as a liquid crystal panel in which an electro-optical substance such as liquid crystal is sandwiched between a pair of substrates, and a surface opposite to a display observation surface side of the electro-optical panel. It is composed of a backlight arranged.

The backlight includes a light guide plate, a sheet-like optical component that is overlapped with the light guide plate, a light source section that allows light to enter the light guide plate from the side of the light guide plate, and the light guide plate and the sheet-like optical component. And a support frame for backlight that is fixed.

The backlight and the electro-optical panel each have a substantially rectangular shape, and the backlight and the electro-optical panel are overlapped with each other and attached by two linear adhesive sheets provided along each of two opposite sides. I'm confused. Further, the backlight support frame has a shape that substantially covers the vicinity of the light source portion of the backlight so as to block light leaking from the light source portion to the display surface of the electro-optical panel.

[0005]

However, in the above-mentioned liquid crystal device structure, the backlight and the electro-optical panel are provided along the two opposite sides, respectively.
Since the two adhesive sheets are attached to each other, a gap is generated between the backlight and the electro-optical panel on the two sides where the adhesive sheets are not arranged. Therefore, if foreign matter such as dust enters between the backlight and the electro-optical panel through this gap, the foreign matter is observed as dots when the electro-optical device is displayed, and the display characteristics deteriorate. was there.

The present invention has been made in view of the above problems, and provides an electro-optical device, an adhesive tape, and an electro-optical device using the adhesive tape, which can efficiently manufacture an electro-optical device having good display characteristics. It is intended to provide an assembly method.

[0007]

In order to solve the above problems, an electro-optical device according to the present invention is an electro-optical panel having an electro-optical material sandwiched between a pair of substrates, and a backlight adjacent to the electro-optical panel. And a sheet having a frame shape, which is disposed between the electro-optical panel and the backlight, the first surface of the sheet adjacent to the electro-optical panel has a light-shielding property, and The second surface adjacent to the backlight is light reflective.

According to such a configuration of the present invention, since the sheet arranged between the electro-optical panel and the backlight has a frame shape, the sheet, the electro-optical panel and the backlight close a closed space. Since foreign matter such as dust does not enter this closed space. Therefore, it is possible to obtain an electro-optical device having stable display characteristics without the problem of deterioration of display characteristics when foreign matter such as dust is mixed. Furthermore, since the first surface of the sheet has a light-shielding property, light leakage from the backlight is prevented, and the second surface of the sheet has a light-reflecting property, so that the outer edge of the display screen is The brightness of the part is not impaired,
It is possible to obtain an electro-optical device in which the display screen has substantially uniform brightness in the plane.

Further, an adhesive layer is arranged on the first surface and the second surface. With such a configuration, the sheet can bond the electro-optical panel and the backlight, and foreign matter such as dust can surely enter the closed space formed by the electro-optical panel and the backlight. Absent. Therefore, it is possible to obtain an electro-optical device having stable display characteristics without the problem of deterioration of display characteristics when foreign matter such as dust is mixed.

Further, the electro-optical panel has a display area for displaying with the electro-optical material, and the display area is arranged in an area defined by an inner edge portion of the sheet. With such a configuration, the sheet has a shape in which the display area is set within the area defined by the inner edge portion of the sheet, in other words, the display area is smaller than the area defined by the inner edge portion of the sheet. Therefore, by determining the size of the area defined by the inner edge of the sheet in consideration of the positional deviation when the electro-optical panel and the sheet are aligned, even when the electro-optical panel and the sheet are aligned, the positional deviation is caused. Even if occurs, the sheet is not positioned in the display area, and it is possible to stably manufacture the electro-optical device having the display area of a constant size.

Further, the backlight is provided with a light guide plate having a light emitting surface facing the electro-optical panel, a sheet-like optical component arranged on the light guide plate, and a side portion of the light guide plate. It has a light source part. The backlight is configured in this way, for example.

The sheet-like optical component is a diffusion plate,
It is characterized by including either a prism sheet or a reflection plate. According to such a configuration, the light emitted from the light guide plate is reflected to the electro-optical panel side by providing the reflecting plate, so that the light efficiency can be improved, and by providing the diffusing plate, the light in the display screen can be improved. The luminance can be made more uniform, and by providing the prism sheet, the orientation angle of the emitted light emitted from the backlight can be adjusted and the front luminance can be improved.

Further, the first surface is characterized by being black. In this way, by making the first surface of the sheet black, it is possible to provide a light shielding property.

The second surface is white. As described above, by making the second surface of the sheet white, light reflectivity can be provided.

Further, the second surface is a mirror surface. Thus, by making the second surface of the adhesive sheet a mirror surface, light reflectivity can be provided.

Further, the adhesive sheet has a white pet film and an aluminum film arranged on the pet film, the first surface is one surface of the pet film, and the second surface is It is characterized in that it is one surface of the aluminum film. As described above, by providing the white PET film, the first surface of the sheet has a light-shielding surface that blocks light leakage from the backlight by the PET film. Further, by providing the aluminum layer, the second surface of the sheet becomes a mirror surface and a surface having light reflectivity.

The second surface of the adhesive sheet is white. In this way, the second adhesive sheet
By making the surface white, light reflectivity can be provided.

Further, the electro-optical material is liquid crystal. As described above, the electro-optical device can be applied to a liquid crystal device.

The tape of the present invention comprises a first release sheet, a second release sheet disposed so as to face the first release sheet, the first release sheet and the second release sheet. And a sheet having a frame shape, the first surface of the sheet adjacent to the first release sheet has a light shielding property, and the second surface of the sheet adjacent to the second release sheet is It is characterized by having light reflectivity.

According to such a constitution of the present invention, it is possible to obtain a tape having one surface having a light shielding property and the other surface having a light reflecting property.

At least one of the first release sheet and the second release sheet has a first region corresponding to a frame portion of the sheet and a second region corresponding to a region surrounded by the frame portion. And are included. With such a configuration, the first release sheet or the second release sheet has a shape that covers the frame portion of the frame-shaped sheet and the region surrounded by the frame portion, and has such a structure. This increases the strength of the entire tape.

At least one of the first release sheet and the second release sheet has a thickness of 75 μm or more and 100 μm or more.
It is characterized by having the following thickness. According to such a configuration, the release sheet having a thickness of 75 μm or more has a good releasability, and the workability at the time of assembling the electro-optical device using such a tape is good. Also, the thickness is 10
When the thickness is 0 μm or less, the release sheet has good releasability, and cost increase can be suppressed to a minimum.

The second surface is white or a mirror surface. Thus, by making the second surface white or mirror-finished, light reflectivity can be provided.

The first surface is black. In this way, by making the first surface black,
It can have a light-shielding property.

Further, the sheet has a white pet film and an aluminum film disposed on the pet film, the first surface is one surface of the pet film, and the second surface is the aluminum film. One side of the membrane,
An adhesive layer is disposed on the first surface and the second surface. As described above, by providing the white PET film, the first surface has a light-shielding property in which light leakage from the backlight is blocked by the PET film. Further, by providing the aluminum layer, the second surface becomes a mirror surface and has light reflectivity. Also,
By providing the adhesive layer, the tape functions as a double-sided tape.

Further, the adhesive layer disposed on the first surface is black. With such a configuration, when the tape is used for bonding the electro-optical panel and the backlight, it is possible to absorb and block the light leaked from the backlight that does not pass through the PET film.

The method of assembling the electro-optical device of the present invention is as follows.
A first release sheet, a second release sheet that faces the first release sheet, a second release sheet, and a frame shape that is disposed between the first release sheet and the second release sheet. A sheet having the first release sheet, the first surface of the sheet adjacent to the first release sheet has a light-shielding property, and the second surface of the sheet adjacent to the second release sheet has a light-reflecting property. The method is characterized by including a step of peeling the second release sheet from the sheet and a step of attaching the second surface to the light emitting surface of the light guide plate.

According to such a configuration of the present invention, since the sheet has a frame-like shape, there is a case in which the adhesive sheets are respectively attached to two facing sides of the substantially rectangular backlight as in the conventional case. Workability is improved in comparison.

Further, in the step of attaching the second surface, the sheet-like optical component arranged on the light emitting surface of the light guide plate is sandwiched by the sheet and the light emitting surface. To do. According to such a configuration, the sheet-shaped optical component is fixedly arranged by attaching the sheet to the light emitting surface.

Further, the step of attaching the second surface is performed after the step of peeling the second release sheet. According to such a configuration, by sticking to the second surface immediately after peeling the second release sheet, dust or the like does not adhere to the second surface.

Further, the method further comprises a step of peeling the first release sheet from the sheet, and a step of attaching the first surface to an electro-optical panel having an electro-optical material sandwiched by a pair of substrates. Characterize. With such a configuration, the electro-optical panel and the backlight are attached to each other by the frame-shaped sheet, so that the area corresponding to the display screen of the electro-optical panel is closed by the electro-optical panel, the backlight, and the adhesive sheet. Because space is formed,
After assembling the electro-optical device, foreign matter such as dust does not enter between the electro-optical panel and the backlight.
Therefore, an electro-optical device having good display characteristics can be obtained.

The step of attaching the first surface is performed after the step of peeling off the first release sheet. According to this structure, the first release sheet is attached to the first surface immediately after the release sheet is peeled off, so that dust or the like does not adhere to the first surface.

At least one of the first release sheet and the second release sheet has a first region corresponding to a frame portion of the sheet and a second region corresponding to a region surrounded by the frame portion. And are included. According to such a configuration, in the state where the sheet is attached to the backlight before the peeling of the first release sheet, the first release sheet covers the frame portion of the frame-shaped sheet and the area surrounded by the frame portion. Since it has a covering shape, the space surrounded by the first release sheet, the backlight, and the adhesive sheet is a closed space, and foreign matter such as dust does not enter. Therefore, until the first release sheet is peeled off in order to bond the backlight and the electro-optical panel, foreign matter such as dust is prevented from adhering to the adhesive surface of the backlight and the electro-optical panel, and scratches are formed. First as a protective film to prevent
The release sheet works.

The first release sheet has a thickness of 75 μm or more and 100 μm or less. According to this structure, the thickness of 75 μm or more facilitates the releasability of the first release sheet and facilitates the workability of assembling the electro-optical device using such an adhesive tape. Further, when the thickness is 100 μm or less, the release sheet has good releasability, and the increase in cost can be suppressed to a minimum.

The second surface is white or a mirror surface. Thus, by making the second surface a mirror surface, light reflectivity can be provided.

The first surface is black. In this way, by making the first surface black,
It can have a light-shielding property.

The sheet has a white pet film and an aluminum film disposed on the pet film, the first surface is one surface of the pet film, and the second surface is the aluminum film. One side of the membrane,
An adhesive layer is disposed on the first surface and the second surface. As described above, by providing the white PET film, the first surface of the sheet has a light-shielding surface that blocks light leakage from the backlight by the PET film. Further, by providing the aluminum layer, the second surface of the sheet becomes a mirror surface and a surface having light reflectivity.

Further, the adhesive layer disposed on the first surface is black. With such a configuration, it is possible to absorb and block the light leaked from the backlight that does not pass through the PET film.

[0039]

DESCRIPTION OF THE PREFERRED EMBODIMENTS A liquid crystal device as an electro-optical device will be described below as an example with reference to the drawings.

(Structure of Liquid Crystal Device) First, the structure of the liquid crystal device will be described with reference to FIGS. 1 and 2. FIG. 1 is a schematic exploded perspective view of a liquid crystal device according to this embodiment, and FIG. 2 is a schematic sectional view of the liquid crystal device. It should be noted that in FIG. 1, a support frame forming a part of the backlight is not shown.

In FIGS. 1 and 2, the liquid crystal device 1 has a liquid crystal panel 100, a backlight 200, and a frame-shaped adhesive sheet 320 for bonding the liquid crystal panel 100 and the backlight 200.

The liquid crystal panel 100 has a first surface 100a and a second surface 100b, and a first substrate 3 arranged on the second surface 100b side and a second substrate 4 arranged on the first surface 100a side.
And a sealing material 7 provided on the peripheral portion of the substrate where the pair of first substrate 3 and the second substrate 4 are bonded together, and sandwiched in a space formed by the pair of substrates 3 and 4 and the sealing material 7. It has an STN liquid crystal 5 as an electro-optical material, and a first polarizing plate 6a and a second polarizing plate 6b provided so as to sandwich a pair of substrates.

A plurality of ITOs (Indium Tin Oxides) are formed on the surface of the first substrate 3 facing the second substrate 4.
A stripe-shaped first transparent electrode 12a made of a film is provided, and an alignment film (not shown) made of polyimide or the like is formed so as to cover the first transparent electrode 12a. on the other hand,
On the surface of the second substrate 4 facing the first substrate 3, stripe-shaped second transparent electrodes 12b made of a plurality of ITO films are provided so as to intersect the first transparent electrodes 12a.
An alignment film (not shown) made of polyimide or the like is formed so as to cover the transparent electrode 12b.

The first substrate 3 and the second substrate 4 each have a rectangular shape, and the first substrate 3 has an overhanging portion 3a overhanging from the second substrate 4. Second substrate 4 of overhanging portion 3a
A first wiring 12b on which a first transparent electrode 12a extends, a first terminal 12c electrically connected to the first wiring 12b, a second transparent electrode 12b and a sealing material. A second wiring (not shown) electrically connected through a conductive material mixed in 7 and a second terminal (not shown) electrically connected to the second wiring are formed. . First terminal 12
An external circuit board (not shown) for supplying a drive signal to the first transparent electrode 12a and the second transparent electrode 12b is electrically connected to c and the second terminal.

In this embodiment, the backlight 20 is used.
0 is arranged adjacent to the second surface 100b of the liquid crystal panel 100, and the second surface 100b of the liquid crystal panel 100 is the surface on the light incident side on which the light emitted from the backlight 200 is incident, and thus the liquid crystal panel 100 The first surface 100a is a surface on the light emission side where the light emitted from the backlight 200 passes through the liquid crystal panel 100 and is emitted from the liquid crystal panel 100. That is, the above-mentioned first polarizing plate 6a and second polarizing plate 6b are arranged on the light incident side surface and the light emitting side surface, respectively.

The backlight 200 is a liquid crystal panel 100.
A rectangular light guide plate 210 having a wedge-shaped cross section, the light exit surface 210a of which faces the second surface 100b side, a light source unit 213 arranged on a side portion of the light guide plate 210 and allowing light to enter the light guide plate 210, and A diffuser plate 254 as a rectangular sheet-like optical component and two prism sheets 251 and 253, which are sequentially arranged between the light guide plate 210 and the liquid crystal panel 100, and light emission from the light guide plate 210. Surface 2
It has a reflecting plate 252 as a rectangular sheet-like optical component that is arranged adjacent to a surface 210b facing the surface 10a, a light guide plate 210, a light source unit 213, and a support frame 400 that supports each sheet-like optical component. The light source unit 213 has a light source lamp 211 including a cold cathode fluorescent tube and a light source unit 213 including a metal reflector 212. A wiring cable (not shown) is connected to the light source lamp 213, and a power supply unit such as an inverter circuit is connected to the wiring cable to supply power to the light source lamp 211.

The reflector 212 efficiently collects the light emitted from the light source lamp 211 and makes it enter the light guide plate 210. The light guide plate 210 is for uniformly irradiating the liquid crystal panel arranged corresponding to the light guide plate 210 with the light emitted from the light source unit 213 within the plane of the liquid crystal panel. The reflection plate 252 is for reflecting the light emitted from the light guide plate 210 to the liquid crystal panel 100 side. The diffusion plate 254 is for making the brightness of the light in the display screen more uniform. Two prism sheets 251 and 25
Reference numeral 3 is for adjusting the orientation angle of emitted light and improving the brightness of the front surface.

Frame-shaped, in other words, frame-shaped adhesive sheet 3
20 is a sheet which can be adhered on both sides. Adhesive sheet 3
Reference numeral 20 denotes a black first surface 320a that is in contact with the second surface 100b of the liquid crystal panel 100 and has a light-shielding property.
It has the first surface 320a and the second surface 320b, which is a mirror surface and faces the second surface having light reflectivity.

The adhesive sheet 320 has the liquid crystal panel 1 within the area defined by the inner edge portion 320c of the adhesive sheet 320.
The liquid crystal display device of No. 00 is formed in a shape such that the display area for displaying the liquid crystal is stopped. Specifically, the adhesive sheet 3
The display area is smaller than the inner edge of 20 by a width of about 1.5 to 2 mm. The value of this width is the light guide plate 2
00 and the liquid crystal panel 100 are bonded together via the adhesive sheet 320, the liquid crystal panel 100 and the adhesive sheet 320
It is determined in consideration of misalignment when aligning with. In this way, by considering the misalignment, even if misalignment occurs, the adhesive sheet 320 does not extend beyond the display area and is positioned, and the liquid crystal device has a stable display area of a certain size. Can be manufactured. Further, in the present embodiment, the liquid crystal panel 100
Since the adhesive sheet 320 that adheres the backlight 200 to each other has a frame shape, the adhesive sheet 320, the liquid crystal panel 100, and the backlight 200 form a closed space. Therefore, the liquid crystal panel 1 using the adhesive sheet 320
After the 00 and the backlight 200 are bonded together, foreign matters such as dust do not enter the closed space. Therefore, the liquid crystal device 1 having stable display characteristics can be obtained without the problem of deterioration of display characteristics due to intrusion of foreign matter such as dust. Further, in this embodiment, since the first surface 320a of the adhesive sheet 320 has a light shielding property, light leakage from the backlight is prevented, and the second surface 320a of the adhesive sheet 320 reflects light. Since the liquid crystal device has the property, it is possible to obtain a liquid crystal device in which the display screen has substantially uniform in-plane brightness without impairing the brightness of the outer edge portion of the display screen.

The first surface 320a of the adhesive sheet has adhesiveness and is black as described above. In this embodiment, black is taken as an example, but a color that absorbs light or a member that shields light may be arranged on the first surface 320a side. In this way, by providing the first surface 320a with a light-shielding property, it is possible to block light leakage from the backlight and prevent the in-plane luminance of the display screen from becoming uneven due to light leakage. . On the other hand, the second surface 320b also has adhesiveness like the first surface 320a, and has a mirror surface as described above. Specifically, the aluminum layer is arranged on the second surface 320b side, and this aluminum layer serves as a mirror surface. The detailed structure will be described later in the description of the adhesive tape having the adhesive sheet 320 as one component. Although the second surface 320b is a mirror surface in the present embodiment, for example, a member having a white color may be provided, and any member that reflects light may be used. Thus, the second surface 320
By providing b with light reflectivity, the backlight 20
The light emitted from 0 is reflected, the brightness of the outer edge of the display area is not impaired, and the display characteristics are good.

The adhesive sheet 320 has a substantially rectangular frame shape, and one side located on the light source 213 side is wider than the other three sides, and the light source 213 and the support frame 400 are provided. It is arranged corresponding to a part. Adhesive sheet 320
The other three sides are the liquid crystal panel 100 and the backlight 20.
It is arranged substantially along the outer edge of 0. The outer edge portion of the adhesive sheet 320 is in contact with the support frame 400. In the present embodiment, the support frame 400 includes the diffusion plate 252,
The light guide plate 210, the light source unit 213, the diffusion plate 254, the prism sheets 251 and 253 are accommodated, and the adhesive sheet 3 is also included.
It has a support portion 400a that supports the outer edge portion of 20.
With this structure, the diffusion plate 254 and the prism sheets 251 and 253 are indirectly fixed to the support frame 400 via the adhesive sheet 320. Therefore, conventionally, the light guide plate and the plurality of sheet-like optical members,
Adjacent ones have been adhered to each other with an adhesive or the like, but in the present embodiment, it is not necessary to adhere them to each other in this way, and the step of laminating the liquid crystal panel and the backlight can be simplified.

(Structure of Adhesive Tape) Next, the adhesive sheet 3 for adhering the above-mentioned liquid crystal panel and backlight.
The structure of the adhesive tape having 20 will be described with reference to FIGS. 3 and 4. FIG. 3 is a schematic exploded perspective view of the adhesive tape, and FIG. 4 is a sectional view of the adhesive tape.

The adhesive tape 300 includes a frame-shaped adhesive sheet 320 having a first surface 320a having adhesiveness and light-shielding property and a second surface 320b having adhesiveness and light-reflecting property facing the first surface. , First surface 320 of adhesive sheet 320
The first release sheet 310 is disposed adjacent to a, and the second release sheet 330 is disposed adjacent to the second surface 320b of the adhesive sheet 320. The adhesive tape 30
The first release sheet 310 and the second release sheet 330 of No. 0 are peeled off, and the adhesive sheet 320 is incorporated into the liquid crystal device as described above.

The adhesive sheet 320 is a white pet film 321 having a first surface 321a and a second surface 321b.
And a first black adhesive layer 310 that is disposed adjacent to the first surface 321a of the pet film 321 and that contains black pigment or the like in the resin located on the first surface 320a side of the adhesive sheet 320, and 322a and a second surface 322b,
The first surface 322a is the second surface 32 of the pet film 321.
Aluminum layer 322 disposed adjacent to 1b
And a transparent second adhesive layer 324 disposed adjacent to the second surface 322b of the aluminum layer 322. Although the first adhesive layer is black in the present embodiment, it may be transparent, that is, light that travels from the second surface 322b side of the adhesive sheet 320 toward the adhesive sheet 320 and does not pass through the aluminum layer 322. Is a white pet film 32
It is possible to block light leaking from the backlight when the liquid crystal device is made to be shielded by 1. Further, in the present embodiment, by providing the aluminum layer 322, the second surface 320b of the adhesive sheet 320 can be made a mirror surface, and light traveling from the second surface 322b side of the adhesive sheet 320 toward the adhesive sheet 320 can be reflected. can do. Further, in this embodiment, the thickness of the adhesive sheet is about 85.
When it is incorporated in a liquid crystal device, if it is too thin, it adheres to the liquid crystal panel to cause interference fringes in the display area to deteriorate display characteristics, and if it is too thick, it becomes difficult to miniaturize it. The thickness of the adhesive sheet may be adjusted to a suitable value depending on the size of the liquid crystal panel.

The first release sheet 310 has a first region 310b corresponding to the frame portion of the frame-shaped adhesive sheet 320 and a second region 310a corresponding to a region surrounded by the frame of the frame-shaped adhesive sheet. . In other words, the first release sheet 310 has a shape that covers the frame portion of the frame-shaped adhesive sheet 320 and the region surrounded by the frame portion. With such a structure, the strength of the adhesive tape 300 is increased. In addition, the substantially rectangular first release sheet 310 has a protruding portion 310c having one side protruding from the adhesive sheet 320, and the protruding portion 310c is arranged at an end portion deviated from a central portion of one side. By providing the protrusion 310c, the first release sheet 310 can be easily peeled off when the liquid crystal device is assembled. First release sheet 310
Has a thickness of, for example, about 100 μm, and when the thickness is 75 μm or more, the releasability is good, and the workability when assembling the liquid crystal device is good. Further, when the thickness is 100 μm or less, the release sheet has good releasability, and the increase in cost can be suppressed to a minimum. Further, in this embodiment, the first release sheet 310 is transparent. As the material of the first release sheet 310, for example, plastic or the like can be used.

The second release sheet 330 has a frame shape corresponding to the frame-shaped adhesive sheet 320. The second release sheet 330 has a thickness of, for example, about 50 μm. By making the thickness thinner than the first release sheet 310, the releasability is good and the workability at the time of assembling the liquid crystal device is good. Further, in this embodiment, the second release sheet 330 has a white color, and the first release sheet 310 and the second release sheet 33.
By setting the color and the shape to 0, it is possible to identify the two surfaces of the adhesive tape 300 that face each other, and the workability at the time of assembling the liquid crystal device is good. Further, as the material of the second release sheet 330, for example, a pet film or the like can be used, and in the present embodiment, the same material as the first release sheet 310 is used. The second release sheet 3
Similarly to the first release sheet 310, the frame 30 may have a shape that covers a frame portion of the frame-shaped adhesive sheet 320 and a region surrounded by the frame portion.

(Method for Assembling Liquid Crystal Device) Next, a method for assembling the above liquid crystal device 1 using the above adhesive tape 300 will be described with reference to FIG. FIG. 5 is a schematic perspective view showing a method of assembling the liquid crystal device.

First, the backlight 200 and the liquid crystal panel 200 described in the structure of the liquid crystal device described above are manufactured and prepared in respective independent manufacturing steps. Moreover, the above-mentioned adhesive tape 300 is prepared.

Next, as shown in FIG. 5A, the second release sheet 330 of the adhesive tape 300 is peeled off. And
The adhesive sheet 320 is attached onto the backlight 200 so that the adhesive sheet 320 and the sheet-shaped optical component arranged on the light emitting surface side of the light guide plate of the backlight 200 come into contact with each other. In this state, the first release sheet 310 remains without being peeled off. In the present embodiment, since the first release sheet 310 is transparent, it is possible to easily align the adhesive sheet 320 and the backlight 200 via the first release sheet 310. Further, in the present embodiment, the first release sheet 310 has a shape that covers the frame portion of the frame-shaped adhesive sheet 320 and the region surrounded by the frame portion, and thus the backlight 200 and the adhesive sheet 320. Backlight 2 when and are pasted together
00, the adhesive sheet 320, and the first release sheet 310 form a closed space, which prevents foreign matter such as dust from adhering to the surface of the backlight 200 on the side where the liquid crystal panel 100 is arranged, and scratches. It is hard to get on. Therefore, for example, the step of adhering the backlight 200 and the adhesive sheet 320 and the step of adhering the backlight 200 and the liquid crystal panel 100 via the adhesive sheet 320, which will be described later, are performed in different places. Such a structure is effective when the product in which the light 200 and the adhesive sheet 320 are pasted together must be transported.

Next, as shown in FIG. 5B, after the first release sheet 310 is peeled off from the adhesive sheet 320 with the protrusion 310c, the backlight 200 and the liquid crystal panel 1 are removed.
Paste 00 and. Since the protruding portion 310c is provided at the end of one side of the first release sheet 310 rather than the center portion, the first release sheet 310 is peeled off as compared with the case where the protruding portion 310c is provided at the center portion of the side. It's easy to do.

The liquid crystal device is assembled as described above.

[Brief description of drawings]

FIG. 1 is a schematic exploded perspective view of a liquid crystal device according to an embodiment of the invention.

2 is a cross-sectional view of the liquid crystal device shown in FIG.

FIG. 3 is a schematic exploded perspective view of the adhesive tape according to the embodiment of the present invention.

FIG. 4 is a cross-sectional view of the adhesive tape shown in FIG.

FIG. 5 is a diagram showing a method of assembling the liquid crystal device according to the embodiment of the invention.

[Explanation of symbols]

1 ... Liquid crystal device 3 ... First substrate 4 ... Second substrate 100 ... Liquid crystal panel 200 ... Backlight 210 ... Light guide plate 210a ... Light emitting surface 213 ... Light source unit 251, 253 ... Prism sheet 252 ... Reflector 254 ... Diffusion plate 300 ... Adhesive tape 310 ... First release sheet 310a ... second area 310b ... first area 320 ... Adhesive sheet 320a ... First surface 320b ... second surface 320c ... Inner edge 321 ... White PET film 321a ... First surface 321b ... Second surface 322 ... Aluminum layer 323 ... First adhesive layer 324 ... Second adhesive layer 330 ... Second release sheet

Front page continuation (51) Int.Cl. ⁷ Identification code FI theme code (reference) G09F 9/00 324 G09F 9/00 324 336 336J 350 350 350Z H04N 5/66 102 H04N 5/66 102A // F21Y 103: 00 F21Y 103: 00 F-term (reference) 2H089 HA40 JA10 KA15 QA08 TA06 TA13 TA17 TA18 TA20 2H091 FA14Z FA23Z FA32Z FA34Z FA41Z FC02 FC12 FD04 FD06 FD14 GA17 LA07 5C058 AA06 AB03 AB06 BA35 5G435 A2700FF15FF15FF30FF15AFFBBFF15AFFBBFFAFFBBFF15AFFBBFFAFFBBAFFBBAFFBB AFFBBFFAFFBB AFFBB AFFBB AFF BB AFF AFF AFF AFF AFF AFF ABB AFF ABB AFF AFF AFF ABB AFF AFF AFF AFF AFF ABB AFF AFF AFF ABB AFF AFF AFF ABB AFF AFF A B AFF A B AFF A B A B A B A B A B A B A B B KK05

Claims (28)

[Claims] 1. An electro-optical panel having an electro-optical material sandwiched between a pair of substrates, a backlight adjacent to the electro-optical panel, a frame disposed between the electro-optical panel and the backlight, and having a frame shape. And a second surface of the sheet adjacent to the backlight has a light-shielding property, and a second surface of the sheet adjacent to the backlight has a light-reflecting property. Electro-optical device. 2. The electro-optical device according to claim 1, wherein an adhesive layer is arranged on the first surface and the second surface. 3. The electro-optical panel has a display area for displaying with the electro-optical material, and the display area is arranged in an area defined by an inner edge portion of the sheet. The electro-optical device according to claim 1. 4. The backlight is a light guide plate having a light emitting surface facing the electro-optical panel, a sheet-like optical component arranged on the light guide plate, and arranged on a side portion of the light guide plate. The electro-optical device according to claim 1, further comprising a light source unit. 5. The electro-optical device according to claim 4, wherein the sheet-shaped optical component includes any one of a diffusion plate, a prism sheet, and a reflection plate. 6. The electro-optical device according to claim 1, wherein the first surface is black. 7. The electro-optical device according to claim 1, wherein the second surface is white. 8. The electro-optical device according to claim 1, wherein the second surface is a mirror surface. 9. The sheet has a white pet film, and an aluminum film disposed on the pet film, the first surface being one surface of the pet film,
The electro-optical device according to claim 1, wherein the second surface is one surface of the aluminum film. 10. The electro-optical device according to claim 1, wherein the electro-optical substance is liquid crystal. 11. A first release sheet, a second release sheet arranged to face the first release sheet, and arranged between the first release sheet and the second release sheet. A sheet having a frame shape, a first surface of the sheet adjacent to the first release sheet has a light-shielding property, and a second surface of the sheet adjacent to the second release sheet has a light-reflecting property. A tape characterized by having. 12. At least one of the first release sheet and the second release sheet has a first region corresponding to a frame portion of the sheet and a second region corresponding to a region surrounded by the frame portion. The tape according to claim 11, comprising: 13. The tape according to claim 11 or 12, wherein at least one of the first release sheet and the second release sheet has a thickness of 75 μm or more and 100 μm or less. 14. The tape according to claim 11, wherein the second surface is white or a mirror surface. 15. The tape according to claim 11, wherein the first surface is black. 16. The sheet has a white pet film and an aluminum film disposed on the pet film, the first surface is one surface of the pet film, and the second surface is the aluminum film. The tape according to any one of claims 11 to 13, wherein the tape is one surface of a film, and an adhesive layer is arranged on the first surface and the second surface. 17. The tape according to claim 16, wherein the adhesive layer disposed on the first surface is black. 18. A first release sheet, a second release sheet disposed so as to face the first release sheet, and disposed between the first release sheet and the second release sheet. A sheet having a frame shape, a first surface of the sheet adjacent to the first release sheet has a light-shielding property, and a second surface of the sheet adjacent to the second release sheet has a light-reflecting property. A method of assembling an electro-optical device, comprising: a step of peeling the second release sheet from the sheet of the adhesive tape having; and a step of attaching the second surface to a light emitting surface of a light guide plate. 19. The step of attaching the second surface, wherein the sheet-like optical component arranged on the light emitting surface of the light guide plate is sandwiched by the sheet and the light emitting surface. The method of assembling the electro-optical device according to claim 18. 20. The method of assembling an electro-optical device according to claim 18, wherein the step of attaching the second surface is performed after the step of peeling off the second release sheet. 21. The method further comprises a step of peeling the first release sheet from the sheet, and a step of attaching the first surface to an electro-optical panel having an electro-optical material sandwiched by a pair of substrates. 21. The method for assembling the electro-optical device according to claim 18, wherein the electro-optical device is assembled. 22. The method of assembling the electro-optical device according to claim 21, wherein the step of attaching the first surface is performed after the step of peeling off the first release sheet. 23. At least one of the first release sheet and the second release sheet has a first region corresponding to a frame portion of the sheet and a second region corresponding to a region surrounded by the frame portion. 23. The method for assembling an electro-optical device according to claim 18, further comprising: 24. The method of assembling the electro-optical device according to claim 18, wherein the first release sheet has a thickness of 75 μm or more and 100 μm or less. 25. The method of assembling an electro-optical device according to claim 18, wherein the second surface is white or a mirror surface. 26. The method of assembling an electro-optical device according to claim 18, wherein the first surface is black. 27. The sheet has a white pet film and an aluminum film disposed on the pet film, the first surface is one surface of the pet film, and the second surface is the aluminum film. 25. The method for assembling an electro-optical device according to claim 18, wherein an adhesive layer is provided on one surface of the film and on the first surface and the second surface. . 28. The method of assembling the electro-optical device according to claim 27, wherein the adhesive layer arranged on the first surface is black.