JP3030346U - Backlight diffuser for liquid crystal display - Google Patents

Abstract

(57) [Abstract] [PROBLEMS] To provide a backlight diffusion plate for a liquid crystal display capable of extremely easily attaching a diffusion plate and peeling a masking film from the diffusion plate. [Structure] In a backlight diffuser for a liquid crystal display, which is disposed on the back surface of a liquid crystal display and diffuses a backlight, masking films A and B are laminated on both front and back surfaces of the diffuser plate 1. A has an outer dimension slightly smaller than the outer shape of the diffusion plate 1, and the other masking film B has an outer dimension larger than the outer shape of the diffusion plate 1.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a backlight diffuser plate for a liquid crystal display, and more particularly, to a backlight diffuser plate that can be supplied to and assembled in a display device without damaging the diffuser plate used in a display of a liquid crystal device.

[0002]

[Prior art]

 Generally, in a liquid crystal display device having a backlight, a liquid crystal panel is placed on the backlight composed of a light source, a reflector, a light guide and a diffuser with an appropriate space or the liquid crystal panel is closely attached to the diffuser. It is provided to form a liquid crystal display panel.

When assembling such a liquid crystal display device, a thin masking film is laminated on both sides of the diffusion plate so that foreign matter such as a fingerprint or dust of an operator adheres to the diffusion plate when the diffusion plate is attached and assembled. , And the diffuser plate are prevented from being scratched. At the time of assembly, one of the masking films covering the diffusion plate is peeled off and assembled to the frame of the assembly panel. The reason why one of the masking films is peeled off is that the masking film is sandwiched between the frames if the masking film is left on. In order to prevent the diffusion plate from getting dirty or scratched, the film is attached again with the diffusion plate attached to the panel.

[0004]

[Problems to be solved by the device]

 As described above, the conventional masking film having the same size as the diffusion plate is laminated on both sides of the diffusion plate. Therefore, when the diffuser plate with the masking film is directly attached to the panel, the masking film is sandwiched between the frame of the panel. Therefore, when attaching the diffuser, the masking film on one side must be peeled off beforehand, and then the diffuser must be attached to the panel. However, since the masking film to be peeled off has the same size as the diffusion plate, it was very difficult to peel off the masking film. Furthermore, after attaching the diffuser plate from which the masking film on one side was peeled off to the panel, it was necessary to re-attach the masking film to protect the surface of the diffuser plate, and this work was also complicated. . In addition, after attaching the diffuser plate to the panel, the masking film attached to the diffuser plate on the opposite side to the above is peeled off, but in this work the size of the masking film was the same as the diffuser plate. It was hard to peel off.

[0005]

[The purpose of the device]

 The present invention solves the problems associated with the conventional backlight diffuser for assembling a liquid crystal display described above, and makes it extremely easy to attach the diffuser and remove the masking film from the diffuser. It is an object of the present invention to provide a backlight diffusion plate for automobiles.

[0006]

[Means for Solving the Problems]

 The present invention has the above-described object to provide a backlight diffusion plate for a liquid crystal display, which is disposed on the back surface of a liquid crystal display and diffuses a backlight, in which masking films are laminated on both front and back surfaces of the diffusion plate. One of the sealing films has an outer dimension slightly smaller than the outer shape of the diffusion plate, and the other masking film has an outer dimension larger than the outer shape of the diffusion plate. Achieved by backlight diffuser.

[0007]

[Action]

 In the present invention, a masking film having an outer dimension slightly smaller than the outer shape of the diffuser is laminated on one side of the diffuser. Therefore, even when the diffuser is mounted on the panel as it is, the diffuser is not attached to the panel frame. The masking film itself, which is smaller than the diffusion plate, does not contact the panel. Therefore, the work of attaching the diffusion plate to the panel as it is can be performed without peeling off the masking film.

Further, after assembling the display device, the masking film is peeled off as needed between the next step and the final step, but even in that case, the masking film is smaller than the diffuser plate. Its edges can be easily picked and peeled off. If necessary, the masking film A may be left attached as it is, and may serve to maintain the function of the diffusion plate.

On the other hand, a masking film larger than the outer shape of the diffuser plate is laminated on the surface of the diffuser plate on the opposite side. Therefore, even if the film is peeled off after the diffuser plate is mounted on the panel, the edge of the film can be very easily removed. The part can be picked and can be easily peeled off from the diffuser plate. The masking film, which has a larger size than the diffuser plate, is a large masking film for multiple diffuser plates, and the masking film is diffused with the diffuser plate pasted on top of it. It can be used not only as a transporting means for the plates but also as a device for automatically supplying and diffusing the diffuser plate to the panel.

As the diffuser plate used in the present invention, various diffuser plates that have been conventionally used can be used, but a Fresnel lens type is particularly preferable. In this case, as the diffusion plate, a Fresnel lens having a thickness of 50 to 300 μm and made of polyester, acrylic, polycarbonate, polystyrene, polyvinyl chloride, triacetate or the like can be used. The Fresnel lens may be produced by screen-printing a UV-curable resin or by a printing method such as gravure-printing the UV-curable resin, or by a molding method such as injection molding, embossing or extrusion. Good.

As the masking film to be laminated on the diffusion plate, it is preferable to use a material having a thickness of about 20 to 100 μm and made of polyethylene, polypropylene, polyester, polyvinyl alcohol, EVA, MMA or the like.

[0012]

Embodiment Hereinafter, the present invention will be described in detail according to an embodiment of the present invention. As shown in FIG. 1, the backlight diffusion plate 1 for a liquid crystal display of the present invention is a masking film A which is slightly smaller than the outer shape of the diffusion plate 1 on the lens surface side (referred to as A side) of the diffusion plate 1 made of a Fresnel lens. And a masking film B having a size slightly larger than the size of the diffusion plate 1 is laminated on the side opposite to the lens surface of the diffusion plate 1.

Between the one side of the masking film A and one side of the diffusion plate 1 adjacent to the one side, 0. The size of the masking film A is made smaller than that of the diffusion plate 1 so that a gap of about 5 to 5 mm is generated. This size is such that the masking film does not get caught on the frame of the panel when the diffusion plate 1 is mounted on the panel of the liquid crystal display.

On the other hand, the masking film B is made larger than the outer shape of the diffusion plate 1 so that a gap of about 1 to 10 mm is formed between one side of the masking film B and one side of the diffusion plate 1 adjacent to the side. I have to.

In order to manufacture the backlight diffuser plate 1 for a liquid crystal display according to the present invention, the diffuser plate 1 made of the Fresnel lens formed as described above is prepared, and the masking film is formed on each side of the Fresnel lens. Laminate A and masking film B.

Next, the masking film A and the diffusion plate 1 are cut from the masking film A side. In this case, the masking film B is so-called half cut so as not to be cut. Further, the masking film A laminated on the diffusion plate 1 is 0.5 to 5 mm smaller than the finished outer shape of the diffusion plate 1 and is made of a Fresnel lens. So-called half cut. As a result, a cut is made between the peripheral portion and the central portion of the masking film A, so that the peripheral portion of the masking film A can be removed with this cut portion as a boundary.

On the other hand, the masking film B is cut with a size larger than the finished size of the diffusion plate 1 on which the masking films A and B are laminated. Then, unnecessary portions around the masking films A and B are removed.

[0018]

[Specific Example]

 A 125 micron-thick polyester sheet was subjected to UV curing resin gravure printing on one side to form a Fresnel lens, which was used as a diffusion plate. Polyethylene having a thickness of 40 μm was laminated as a masking film on both sides of this diffusion plate. The size of the masking film on the lens surface side of the diffuser plate 1 was 2.5 mm smaller than the size of the diffuser plate 1 on the periphery. On the other hand, the masking film on the opposite side of the diffuser plate 1 has an outer dimension that is 5 mm larger than the finished dimension of the diffuser plate 1. By using the backlight diffusion plate 1 for a liquid crystal display, the panel of the liquid crystal display can be mounted extremely quickly and easily, and the diffusion plate 1 is not scratched or soiled.

[0019]

[Effect of device]

 In the present invention, a masking film having an outer dimension slightly smaller than the outer shape of the diffuser is laminated on one side of the diffuser. Therefore, even when the diffuser is mounted on the panel as it is, the masking film smaller than the diffuser is used. Touches the frame part of the panel, and the masking film itself does not touch the panel. Therefore, the work of directly attaching the diffusion plate to the panel can be performed without peeling off the masking film.

Further, after assembling the display device, the masking film is peeled off as needed between the next step and the final step, but even in that case, the masking film is smaller than the diffusion plate, Its edges can be easily picked and peeled off. If necessary, the masking film A may be left attached as it is, and may serve to maintain the function of the diffusion plate.

On the other hand, a masking film larger than the outer shape of the diffuser plate is laminated on the surface of the diffuser plate on the opposite side. Therefore, even if the film is peeled off after the diffuser plate is mounted on the panel, it is extremely easy to remove the edge. The part can be picked and can be easily peeled off from the diffuser plate. The masking film, which has a larger size than the diffuser plate, is a large masking film for multiple diffuser plates, and the masking film is diffused with the diffuser plate pasted on top of it. It can be used not only as a transporting means for the plates but also as a device for automatically supplying and diffusing the diffuser plate to the panel.

[Brief description of drawings]

1 is a cross-sectional view of a backlight diffusion plate for a liquid crystal display according to the present invention.

[Explanation of symbols]

 1 Diffuser A Masking film B Masking film

Claims (9)

[Scope of utility model registration request] 1. A backlight diffusion plate for a liquid crystal display, which is disposed on the back surface of a liquid crystal display for diffusing a backlight, wherein masking films are laminated on both front and back surfaces of the diffusion plate, and one of the masking films is provided. A backlight diffusion plate for a liquid crystal display, which has an outer dimension slightly smaller than the outer dimension of the diffusion plate, and the other masking film has an outer dimension greater than the outer dimension of the diffusion plate. 2. The backlight diffusion plate for a liquid crystal display according to claim 1, wherein the diffusion plate is a Fresnel lens. 3. The backlight diffuser plate for a liquid crystal display according to claim 1, wherein the diffuser plate is a Fresnel lens having a thickness of 50 to 300 μm. 4. The diffusion plate is polyester, acrylic,
The backlight diffusion plate for a liquid crystal display according to claim 1, which is a Fresnel lens made of polycarbonate, polystyrene, polyvinyl chloride or triacetate and having a thickness of 50 to 300 microns. 5. The masking film is 20-100.
The backlight diffuser plate for a liquid crystal display according to claim 1, which has a thickness of micron. 6. The masking film is made of polyethylene, polypropylene or polyester, and 20.
The backlight diffuser plate for a liquid crystal display according to claim 1, having a thickness of ˜100 μm. 7. The size of the masking film such that a gap of about 0.5 to 5 mm is formed between one side of the masking film smaller than the outer shape of the diffuser plate and one side of the diffuser plate adjacent to the one side. 7. The backlight diffuser plate for a liquid crystal display according to claim 1, wherein the backlight diffuser plate is smaller than the diffuser plate. 8. The masking film is made larger than the diffuser plate so that a gap of about 1 to 10 mm is formed between one side of the masking film larger than the outer shape of the diffuser plate and one side of the diffuser plate adjacent to the side. The backlight diffuser plate for a liquid crystal display according to any one of claims 1 to 7. 9. A backlight diffusion plate for a liquid crystal display, which is disposed on the back surface of a liquid crystal display and diffuses a backlight, wherein the diffusion plate is made of polyester, acrylic, polycarbonate, polystyrene, polyvinyl chloride or triacetate, A Fresnel lens having a thickness of 300 μm, wherein a masking film having a thickness of 20 to 100 μm, which is made of polyethylene, polypropylene or polyester, is laminated on both front and back surfaces of a diffusion plate. The masking film has an outer size smaller than that of the diffusion plate so that a gap of about 0.5 to 5 mm is formed between one side of the masking film and one side of the diffusion plate adjacent to the one side, and the other masking film is the masking film of the masking film. Next to one side 1 to 1 between the side of the diffusion plate for
A backlight diffusion plate for a liquid crystal display, which has an outer dimension larger than that of the diffusion plate so that a gap of about 0 mm is generated.