JP7084741B2 - Manufacturing method of display device, television receiver and display device - Google Patents

Description

The present invention relates to a display device, a television receiver, and a method for manufacturing the display device.

In recent years, a liquid crystal display device has become widespread as a display device for displaying an image. The liquid crystal display device is configured such that a backlight is arranged on the back surface of the liquid crystal panel, the light emission of the backlight is modulated by the liquid crystal panel and transmitted, and an image is displayed on the front surface of the liquid crystal panel. In recent years, in the display device, an edge light type backlight using an LED (light emitting diode) as a light source has been adopted in order to realize both reduction in power consumption and reduction in thickness.

The edge light type backlight is configured by accommodating a light guide plate and a light source in a rectangular dish-shaped storage container. The light guide plate is provided with a reflective sheet on one surface of a translucent resin flat plate such as acrylic, and the storage container is provided with the reflective sheet facing the bottom surface of the storage container so as to cover the bottom surface. It is stored in. The liquid crystal display device includes a bezel that covers the peripheral edge of the liquid crystal panel, and the storage container and the bezel are fixed by screws (see, for example, Patent Document 1). The storage container contains a metal frame such as aluminum, and the liquid crystal panel is sandwiched between the frame and the bezel fixed by screws.

Japanese Unexamined Patent Publication No. 2016-54358

However, since the display device of Patent Document 1 fixes the frame and the bezel of the storage container with screws and sandwiches the liquid crystal panel, there is a problem that the fixing structure becomes complicated.

The present disclosure has been made in view of such circumstances, and an object of the present disclosure is to provide a display device or the like capable of fixing a display panel with a simple configuration.

The display device according to the present disclosure has a display panel for displaying an image on the front surface and one surface facing the back surface of the display panel, and guides the back surface of the display panel to emit light emitted from the one surface. In a display device including a light plate and a dish-shaped storage container for storing the light guide plate so as to cover it from the other side, the storage container has a plate shape that covers one edge of the light guide plate from the display panel side. The display panel and the storage container are fixed by adhesion between the peripheral edge portion of the back surface of the display panel and one surface of the covering portion facing the peripheral edge portion.

According to the present disclosure, it is possible to provide a display device or the like capable of fixing a display panel with a simple configuration.

It is a perspective view which shows the display device which concerns on Embodiment 1. FIG. It is a side view which shows the display device. It is a partial vertical sectional view of a main part by line III-III of FIG. It is explanatory drawing of the manufacturing method of a display device. It is a side view which shows the display device which concerns on Embodiment 2.

(Embodiment 1)
Hereinafter, embodiments of the present invention will be described. FIG. 1 is a perspective view illustrating a display device according to the first embodiment. FIG. 2 is a side view illustrating the display device. The display device is a liquid crystal display device 1 provided with a liquid crystal panel 2 as a display panel for displaying an image. The liquid crystal display device 1 includes a backlight 4 that irradiates the liquid crystal panel 2 with light.

The liquid crystal panel 2 has a rectangular plate shape and includes a display unit for displaying an image on the front surface. The back side of the liquid crystal panel 2 is covered with a backlight chassis 43 (storage container, see FIG. 3) constituting the outer housing of the backlight 4. The backlight chassis 43 constitutes the exterior body of the liquid crystal display device 1.

The liquid crystal display device 1 shown in FIG. 1 is configured as a television receiver including a receiving unit 9 and a signal processing unit 8. The receiving unit 9 is connected to an antenna (not shown) and receives television broadcasts via the antenna. The signal processing unit 8 demodulates the data related to the television broadcast received by the receiving unit 9, separates the image data from the demodulated data, and outputs the separated image data. The liquid crystal panel 2 displays an image based on the image data output by the signal processing unit 8.

The liquid crystal display device 1 includes a box-shaped cover 6. The cover 6 is arranged on the lower side of the liquid crystal panel 2 and is provided so as to cover the backlight chassis 43, the signal processing unit 8, and the receiving unit 9 from the back surface side.

The liquid crystal display device 1 includes legs 7. The liquid crystal display device 1 is supported by the legs 7 and placed on a flat table, and is used by keeping the display surface of the liquid crystal panel 2 in a vertical posture. In the following description, the display surface side of the liquid crystal panel 2 is referred to as the front, and the other surface is referred to as the rear. Further, the upper and lower parts used in the following description correspond to the upper and lower parts in the above-mentioned used state, and the left and right parts correspond to the left and right sides when viewed from the front side in the used state.

FIG. 3 is a partial vertical sectional view of a main part according to lines III-III of FIG. In this partial vertical sectional view, a part of the upper part of the liquid crystal display device 1 is shown. The backlight 4 includes a light guide plate 41 inside the backlight chassis 43. The backlight chassis 43 is a metal housing formed in a shallow dish shape by raising the peripheral edge of the rectangular bottom plate 431 substantially vertically and arranging a short side wall 432 around it. A plate-shaped covering portion 433 that projects substantially vertically inward is formed on the edge of the side wall 432. The covering portion 433 is provided on the edge of the upper side wall 432 and the left and right edges. As shown in FIG. 3, the bottom plate 431, the side wall 432, and the covering portion 433 of the backlight chassis 43 form an inverted U shape in a cross-sectional view.

The light guide plate 41 is a flat plate made of glass or a resin having translucency such as acrylic resin, and is formed into a rectangular shape. A reflective sheet 42 is provided on one surface (rear surface) of the flat plate of the light guide plate 41. The reflective sheet 42 is attached to the rear surface and the side surface of the light guide plate 41. The light guide plate 41 is housed in the backlight chassis 43 so that the adherend surface (rear surface) of the reflective sheet 42 faces the side of the bottom plate 431 of the backlight chassis 43 and covers substantially the entire surface of the bottom plate 431. The upper edge (upper edge), left and right edges, or upper edge and left and right edges of the surface (front surface) of the light guide plate 41 on the liquid crystal panel 2 side are covered from the liquid crystal panel 2 side by the covering portion 433. It has been.

On the front surface of the light guide plate 41, an optical sheet group 3 composed of three laminated optical sheets 3A, 3B, and 3C is provided. The optical sheet 3A provided in contact with the front surface of the light guide plate 41, that is, the optical sheet 3A located closest to the light guide plate 41, has an upper end extending outward from the upper end surface (upper edge portion) of the light guide plate 41. It has a stretched portion 31. The other optical sheets 3B and 3C having no extending portion 31 are provided so that their upper ends are located inside the upper end surface of the light guide plate 41 and the tip of the covering portion 433 in front view. That is, the area of the optical sheet 3A provided in contact with the front surface of the light guide plate 41 is set to be larger than that of the other optical sheets 3B and 3C. Further, the area of the optical sheet 3A provided in contact with the front surface of the light guide plate 41 is set to be larger than the area of the light guide plate 41. In this way, the extended portion 31 is formed by making the area of the optical sheet 3A provided in contact with the front surface of the light guide plate 41 larger than the areas of the other optical sheets 3B, 3C and the light guide plate 41. The optics.

The backlight 4 includes a light source substrate (not shown) provided so as to face the lower edge (lower end surface) of the light guide plate 41, and light emitted from the light source substrate includes the light guide plate 41 and the optical sheet group 3. The back surface of the liquid crystal panel 2 is irradiated through.

The liquid crystal panel 2 has a known configuration in which a liquid crystal is enclosed between an array substrate and a color filter substrate, and polarizing plates are laminated on both surfaces thereof. The liquid crystal panel 2 is made of glass or a transparent resin such as acrylic resin. A black matrix 21 for forming a region through which light for displaying an image is not transmitted is provided on the peripheral portion of the liquid crystal panel 2. The liquid crystal enclosed between the array substrate and the color filter substrate is driven by the liquid crystal drive substrate connected to the liquid crystal panel 2.

The liquid crystal panel 2 is bonded and fixed to the backlight chassis 43 with a double-sided tape 5 interposed between the liquid crystal panel 2 and the front surface of the cover portion 433 of the backlight chassis 43. The double-sided tape 5 is provided so as to correspond to the position where the black matrix 21 is provided.

The liquid crystal panel 2 and the backlight chassis 43 are fixed by adhesion between the peripheral edge portion of the back surface of the liquid crystal panel 2 and one surface of the covering portion 433 of the backlight chassis 43 facing the peripheral edge portion, so that the configuration is simple. The liquid crystal panel 2 can be fixed.

Since the backlight chassis 43 has a covering portion 433 that protrudes inward from the edge of the upper side wall 432 and the edges of the left and right side wall 432s, the strength of the backlight chassis 43 can be improved.

Since the light guide plate 41 is housed in the backlight chassis 43 and the covering portion 433 covers the upper edge portion and the left and right edges of the light guide plate 41, the combination of the backlight chassis 43 and the light guide plate 41 can be used. The strength can be further improved.

The separation distance between the rear surface of the cover portion 433 and the front surface of the bottom plate 431 is smaller than the thickness of the light guide plate 41 and the optical sheet group 3, and is smaller than the thickness of the optical sheet 3A having the light guide plate 41 and the extension portion 31. It's made bigger. Therefore, the separation distance between the rear surface of the cover portion 433 and the front surface of the bottom plate 431 can be reduced, and the width of the liquid crystal display device 1 can be reduced.

The extending portion 31 of the optical sheet 3A directly adhered to the front surface of the light guide plate 41 is located outside the upper end surface (upper edge portion) of the light guide plate 41. Therefore, even when the temperature of the light guide plate 41 drops and contracts when the temperature is low and the upper end surface of the light guide plate 41 is located inside the tip of the cover portion 433, the light guide plate 41 is caused by the extension portion 31. It is possible to prevent the liquid crystal panel 2 from tilting toward the side.

FIG. 4 is an explanatory diagram of a method of manufacturing a display device. The manufacturing method of the display device according to the first embodiment will be described below with reference to FIG.

First, a backlight chassis 43 for accommodating the light guide plate 41 is prepared. Next, the reflective sheet 42 is arranged in the backlight chassis 43 from the lower end surface side (lower edge portion side) where the covering portion 433 is not provided (see FIG. 4A). The upper end portion of the arranged reflective sheet 42 is located between the covering portion 433 and the bottom plate 431.

Next, the light guide plate 41 is arranged in the backlight chassis 43 from the lower end surface side where the cover portion 433 is not provided (see FIG. 4B). The upper end surface of the arranged light guide plate 41 is located between the covering portion 433 and the bottom plate 431.

Next, the optical sheet 3A is arranged in the backlight chassis 43 from the lower end face side where the covering portion 433 is not provided (see FIG. 4C). The length of the optical sheet 3A is set so that the upper end portion (extended portion 31) of the optical sheet 3A is located outside the upper end surface of the light guide plate 41. The upper end portion (extended portion 31) of the arranged optical sheet 3A is located between the covering portion 433 and the bottom plate 431. The optical sheet 3A is adhered and fixed to the surface (front surface) of the light guide plate 41 on the liquid crystal panel 2 side.

Next, a plurality of other optical sheets 3B and 3C are laminated on the optical sheet 3A exposed from the backlight chassis 43 when viewed from the cover portion 433 side (see FIG. 4D) to form the optical sheet group 3. do. These laminated optical sheets 3A, 3B, and 3C are adhered to each other at the contact surface.

Next, a liquid crystal panel 2 to which one side of the double-sided tape 5 is attached is prepared at a position corresponding to the black matrix 21 on the back surface. Next, the other surface of the double-sided tape 5 is aligned and adhered to the front surface of the corresponding covering portion 433, and the liquid crystal panel 2 is adhered and fixed to the backlight chassis 43 (see FIG. 4E).

(Embodiment 2)
FIG. 5 is a side view illustrating the display device according to the second embodiment. The display device according to the second embodiment is different from the display device according to the first embodiment in that the shape of the optical sheet 3A in contact with the front surface of the light guide plate 41 is different.

Similar to the other optical sheets 3B and 3C, the upper end of the optical sheet 3A in contact with the front surface of the light guide plate 41 of the second embodiment is inward in front of the upper end surface of the light guide plate 41 and the tip of the covering portion 433. It is provided so as to be located.

The separation distance between the rear surface of the cover portion 433 of the light guide plate 41 and the facing portion of the front surface of the bottom plate 431 is larger than the thickness of the light guide plate 41 and smaller than the thickness of the light guide plate 41 and the optical sheet group 3. The thickness of the optical sheet group 3 is set by the thickness of the covering portion 433 or the thickness of the double-sided tape 5 so that the separation distance between the rear surface of the covering portion 433 and the back surface of the liquid crystal panel 2 is approximately 90%. be.

By setting the thickness of the optical sheet group 3 to be approximately 90% of the separation distance between the rear surface of the covering portion 433 and the facing portion of the back surface of the liquid crystal panel 2, the temperature of the light guide plate 41 can be adjusted to a low temperature or the like. Even when the upper end surface of the light guide plate 41 is located inside the tip of the covering portion 433 and the light guide plate 41 is tilted toward the liquid crystal panel 2, the temperature of the light guide plate 41 rises due to the decrease and contraction. The light guide plate 41 can be returned to its original position by extending the light guide plate 41.

The display device 1 according to the embodiment of the present disclosure has a display panel 2 for displaying an image on the front surface and one surface facing the back surface of the display panel 2, and the light emitted from the one surface is directed to the display panel. In a display device 1 including a light guide plate 41 for irradiating the back surface of 2 and a dish-shaped storage container 43 for storing the light guide plate 41 so as to cover the light guide plate 41 from the other side, the storage container 43 is the light guide plate 41. The display panel 2 and the storage container 43 include a plate-shaped covering portion 433 that covers an edge portion on one surface from the display panel 2 side, and the display panel 2 and the storage container 43 are a peripheral portion on the back surface of the display panel 2 and the covering portion facing the peripheral edge portion. It is fixed by adhering to one surface of the portion 433.

In the present embodiment, the storage container 43 includes a plate-shaped covering portion 433 that covers an edge portion of one surface of the light guide plate 41 from the display panel 2 side, and the display panel 2 and the storage container 43 are the display panel. Since the peripheral edge portion on the back surface of 2 and one surface of the covering portion 433 facing the peripheral edge portion are fixed by adhesion, the display panel 2 can be fixed with a simple configuration.

In the display device 1 according to the embodiment of the present disclosure, a plurality of laminated optical sheets 3 are provided on one surface of the light guide plate 41, and among the plurality of optical sheets 3, one surface of the light guide plate 41 is provided. The end portion (extended portion 31) of the optical sheet 3A provided in contact with the light guide plate 41 extends outward from the edge portion of the light guide plate 41.

In the present embodiment, the end portion of the optical sheet 3 provided in contact with one surface of the light guide plate 41 extends outward from the edge portion of the light guide plate 41, and therefore the end portion of the optical sheet 3 is extended. The unit can prevent the light guide plate 41 from tilting toward the display panel 2.

In the display device 1 according to the embodiment of the present disclosure, a plurality of laminated optical sheets 3 are provided on one surface of the light guide plate 41, and among the plurality of optical sheets 3, they are laminated on the display panel 2 side. The ends of the optical sheets 3B and 3C are located inside the covering portion 433 in front view.

In the present embodiment, among the plurality of optical sheets 3, the ends of the optical sheets 3B and 3C laminated on the display panel 2 side are located inside the covering portion 433, so that the bottom plate of the storage container 43 is located. The distance between the 431 and the covering portion 433 can be shortened, and the width of the display device 1 can be reduced.

In the display device 1 according to the embodiment of the present disclosure, the covering portion 433 is provided so as to cover the upper edge portion and the left and right edges of the light guide plate 41.

In the present embodiment, the covering portion 433 is provided so as to cover the upper edge portion and the left and right edge portions of the light guide plate 41, so that the strength of the storage container 43 can be improved.

The television receiver according to the embodiment of the present disclosure includes the display device 1 according to the present embodiment and the receiving unit 9 for receiving the television broadcast, and is based on the television broadcast received by the receiving unit. The image is displayed on the display panel 2.

In the present embodiment, it is possible to provide a television receiver provided with a display device 1 for fixing the display panel 2 in a simple configuration.

The method for manufacturing the display device 1 according to the embodiment of the present disclosure is a dish-shaped storage container 43 for storing the light guide plate 41, and the edge portion of the light guide plate 41 is opposite to the bottom plate 431 of the storage container 43. A step of preparing the storage container 43 including a plate-shaped covering portion 433 to be covered from the side, and an end face side on which the covering portion 433 is not provided, a reflective sheet is arranged in the storage container 43, and the storage container is provided. The step of storing in the storage container 43, the step of arranging the light guide plate 41 in the storage container 43 from the end face side where the cover portion 433 is not provided, and the step of storing the cover portion 433 in the storage container 43, and the cover portion 433 A step of arranging one optical sheet 3A in the storage container 43 from the end face side not provided and storing it in the storage container 43, and one surface of the one optical sheet 3A exposed from the storage container 43. In addition, a step of laminating another plurality of optical sheets 3B and 3C, a step of preparing a display panel 2 for displaying an image on the front surface, and a peripheral edge portion on the back surface of the display panel 2 and one surface of the cover portion 433. Includes a step of aligning, interposing a double-sided tape 5 between the peripheral edge portion and the covering portion 433, and adhering and fixing the display panel 2 and the storage container 43.

In the present embodiment, the display device 1 for fixing the display panel 2 can be manufactured with a simple configuration.

The embodiments disclosed this time should be considered to be exemplary in all respects and not restrictive. The scope of the present invention is indicated by the scope of claims, not the above-mentioned meaning, and is intended to include all modifications within the meaning and scope equivalent to the scope of claims.

1 Liquid crystal display device (display device)
2 Liquid crystal panel (display panel)
21 Black Matrix 3 Optical Sheet Group 3A Optical Sheet 3B Optical Sheet 3C Optical Sheet 31 Extension 4 Backlight 41 Light Guide Plate 42 Reflective Sheet 43 Backlight Chassis (Storage Container)
431 Bottom plate 432 Side wall 433 Cover part 5 Double-sided tape 6 Cover 7 Legs 8 Signal processing part 9 Receiver part

Claims (4)

A display panel that displays an image on the front surface, a light guide plate that is arranged so that one surface faces the back surface of the display panel and irradiates the back surface of the display panel with light emitted from the one surface, and the light guide plate and the like. In a display device provided with a dish-shaped storage container that is stored so as to cover from the surface side.
The storage container includes a plate-shaped covering portion that covers an edge portion of one surface of the light guide plate from the display panel side.
The display panel and the storage container are fixed by adhesion between the peripheral edge portion of the back surface of the display panel and one surface of the covering portion facing the peripheral edge portion .
A plurality of laminated optical sheets are provided on one surface of the light guide plate.
Of the plurality of optical sheets, only the end portion of the optical sheet provided in contact with one surface of the light guide plate extends outward from the edge portion of the light guide plate.
Of the plurality of optical sheets, the end portions of the optical sheets other than the optical sheet provided in contact with one surface of the light guide plate are located inside the covering portion in front view.
A display device characterized by that. The display device according to claim 1 , wherein the covering portion is provided so as to cover the upper edge portion and the left and right edge portions of the light guide plate. The display device according to claim 1 or 2 , and a receiving unit for receiving television broadcasting are provided.
A television receiver characterized in that an image is displayed on the display panel based on the television broadcast received by the receiver. A step of preparing a dish-shaped storage container for storing a light guide plate, which includes a plate-shaped covering portion that covers the edge of the light guide plate from the side opposite to the bottom plate of the storage container.
A step of arranging the reflective sheet in the storage container from the end face side where the cover portion is not provided and storing the reflective sheet in the storage container.
A step of arranging the light guide plate in the storage container from the end face side where the cover portion is not provided and storing the light guide plate in the storage container.
A step of arranging one optical sheet in the storage container from the end face side where the cover portion is not provided and storing the optical sheet in the storage container.
A step of laminating a plurality of other optical sheets on one surface of one optical sheet exposed from the storage container, and
The process of preparing a display panel that displays an image on the front,
The peripheral edge of the back surface of the display panel and one surface of the covering portion are aligned with each other, a double-sided tape is interposed between the peripheral edge portion and the covering portion, and the display panel and the storage container are adhered and fixed. Including the process of
Of the one optical sheet and the other plurality of optical sheets, only the end portion of the one optical sheet provided in contact with one surface of the light guide plate extends outward from the edge portion of the light guide plate. It has been set up,
Of the one optical sheet and the other plurality of optical sheets, the end portions of the other plurality of optical sheets are located inside the covering portion in front view.
A method of manufacturing a display device, characterized in that .

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