JP2013003195A - Display device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent a liquid droplet from entering a display device.SOLUTION: A liquid crystal display device comprises: a liquid crystal panel 3; a chassis 4 having an outer peripheral part disposed substantially opposite to a panel outer peripheral part; and a bezel 5 as an exterior member covering the chassis 4 from the outside; and a groove part 6b provided in a drip-proof member 6 of the liquid crystal panel 3. A part of the groove part 6 is inserted to an opening 5b through an opening 4b of the chassis 4, so that a water droplet 10 attached to a surface of the liquid crystal panel 3 is discharged out of the device.

Description

  The present invention relates to a drip-proof structure for a display device, and more particularly to a drip-proof structure using a film material.

In recent years, demands for thinner and lighter liquid crystal display devices have increased, and liquid crystal panels with higher definition than before have started to appear on the market. FIG. 8A is a perspective view of a conventional liquid crystal display device 101. FIG. 8B is a partial cross-sectional view taken along the line BB in FIG. FIG. 8C is a partial cross-sectional view taken along the line CC of FIG. 8A, showing another example of the internal structure.
The liquid crystal display device 101 includes a bezel 105, a chassis 104, a panel (liquid crystal display panel) 103, a case (backlight case) 102, and a rear cover 107 in order from the front side. In the example of FIG. 8B, the outer peripheral edge of the panel 103 is fitted and fixed in a recess 102a formed on the front surface of the case 102. The rectangular frame-shaped chassis 104 is a sheet metal member having a rectangular tube portion 104a and a front surface portion 104c. Rubber cushioning material 108 is disposed at the four corners of panel 103 between front panel 104c and restrains the position in the front-rear direction without applying a large pressing force to panel 103. In a place where the buffer material 108 is not provided, there is a gap between the front surface of the panel 103 and the front surface portion 104 c of the chassis 104. Connected to the upper end 103a of the panel 103 is a substrate (drive circuit substrate) 103c on which a source driver IC 103b (also referred to as an X driver IC) for applying a drive voltage to each of a large number of pixels is mounted. The source driver IC 103 b is disposed between the chassis 104 and the case 102, and the generated heat is transmitted to the heat conductive sheet 109 and diffuses to the chassis 104.

By the way, as the resolution of liquid crystal panels is increased, the amount of heat generated on the substrate increases as more image information needs to be processed. In addition, since the panel pixels become smaller, the aperture ratio decreases, and the amount of transmitted light decreases. In order to compensate for this, the amount of heat generated also increases due to the need to increase the amount of light in the backlight section. Furthermore, as the number of pixels increases, the number of source driver ICs increases, and the overall heat generation amount also increases. Due to the temperature rise, the source driver IC located in the upper part of the housing is exposed to a high temperature atmosphere.
Therefore, as shown in FIG. 8C, a configuration in which the source driver IC 103b is disposed below the lower end portion of the panel 103 is conceivable. Due to condensation or the like, the water droplets 110 attached to the panel 103 flow downward along the surface, and enter from the gap between the panel 103 and the chassis 104. This causes an electrical short circuit between the substrate 103c and the source driver IC 103b, and causes image display to be hindered.

The conventional display device has the following problems in drip-proof measures.
In the example of FIG. 8C, in order to prevent the intrusion of the water droplet 110, a method can be considered in which the cushioning material 108 is attached and pressed without gaps over the entire front side in the vicinity of the lower end portion 103d of the panel 103. . In this case, the panel 103 may be distorted by the pressing force, or an image may not be displayed correctly due to display unevenness.
Further, as shown in FIG. 8D, a configuration is also conceivable in which the front plate 111 is opposed to the panel 103 and separated from the panel 103 by a certain distance, and is adhered and fixed to the front portion of the bezel 112 so as not to press the panel 103. In this case, the water droplet 110 attached to the surface of the front plate 111 falls out of the housing from the lower end portion of the front plate 111 without entering the housing. Although the penetration of the water droplet 110 can be prevented, the thickness of the housing increases by the distance between the front plate 111 and the panel 103. Furthermore, the increase in the weight of the entire casing due to the weight of the front plate 111 is contrary to the demand for reduction in thickness and weight.
SUMMARY OF THE INVENTION An object of the present invention is to prevent droplets from entering a display device.

  In order to solve the above problems, an apparatus according to the present invention is a display device including a display panel having a display area, a member covering the periphery of the display panel, and a drip-proof means provided on the display panel. The drip-proof means is provided with a groove part for discharging droplets adhering to the surface of the display panel to the outside of the apparatus, and an opening for penetrating the groove part is formed in a member covering the periphery of the display panel.

  According to the present invention, it is possible to prevent adverse effects caused by the ingress of droplets.

FIG. 5 is a perspective view showing a liquid crystal display device in order to explain the first embodiment of the present invention in conjunction with FIGS. It is a disassembled perspective view which illustrates the main mechanism part of a liquid crystal display device. It is side surface sectional drawing which illustrates the structure of the front center lower part of a liquid crystal display device. It is the perspective view (A) and side surface sectional view (B) explaining a drip-proof member. It is a disassembled perspective view explaining the groove | channel formation part of the liquid crystal display device which concerns on 2nd Embodiment of this invention. It is a disassembled perspective view explaining the drip-proof member of the liquid crystal panel which concerns on 3rd Embodiment of this invention. It is a front view explaining the horizontal installation state (A) and vertical installation state (B) of the liquid crystal panel which concern on 3rd Embodiment of this invention. It is a figure which shows the structural example of the conventional liquid crystal display device.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. In the following, a display device using a liquid crystal panel as a display panel will be described, but the present invention can be applied to a plasma display panel, an organic EL display panel, an FED panel, a display panel using a surface conduction electron-emitting device, and the like.

[First Embodiment]
FIG. 1 is a perspective view of a liquid crystal display device 1 according to the first embodiment of the present invention. FIG. 1 shows a liquid crystal panel 3, a bezel 5 and a rear cover 7 which are exterior members.
FIG. 2 is an exploded perspective view of the main mechanism portion of the liquid crystal display device 1. FIG. 2 shows a bezel 5, a chassis member (hereinafter simply referred to as a chassis) 4, a drip-proof member 6, a liquid crystal panel 3, a backlight (hereinafter abbreviated as BL) case 2, and a rear cover 7 in order from the front side. . In this example, a chassis 4 and a bezel 5 are provided as covering members that cover the periphery of the liquid crystal panel 3, and the chassis 4 is disposed inside the bezel 5 that is an exterior member. In the following description, in the liquid crystal display device 1, the direction of the arrow 1a is the front and the direction of the arrow 1b is the rear. Further, when viewed from the user, the direction of the arrow 1c is rightward, the direction of the arrow 1d is leftward, the direction of the arrow 1e is downward, and the direction of the arrow 1f is upward.

FIG. 3 is a side cross-sectional view of the liquid crystal display device 1 when the lower portion near the front center is cut in the vertical direction.
The BL case 2 has a plate-like case base portion 2a formed in a rectangular shape with a metal material such as aluminum, and a case tube portion 2c joined in close contact with a screw (not shown) at an outer peripheral edge portion 2b of the case base portion 2a. Consists of. The case cylinder part 2c is formed of a resin material such as ABS (acrylonitrile butadiene styrene) resin, and four plate parts are integrated vertically and horizontally to form a cylinder shape. A concave portion 2d is formed in the front surface of the inner wall of the case tube portion 2c and receives the outer peripheral edge portion of the liquid crystal panel 3. A light source (not shown) is disposed in a space formed by the BL case 2 and the liquid crystal panel 3.
The liquid crystal panel 3 has a display area 3a for displaying an image on the front side, and the left and right positions (see arrows 1c and 1d) and the rear direction (see arrow 1b) are positioned by fitting into the recess 2d of the BL case 2. It is prescribed. Further, soft rubber cushioning materials 8 are disposed at the four corners of the liquid crystal panel 3 between the front surface of the liquid crystal panel 3 and the front surface portion 4 b of the chassis 4. A source driver IC 3d (also referred to as an X driver IC) is mounted on the drive circuit board 3c connected to the panel lower end 3b of the liquid crystal panel 3 in order to drive a large number of pixels. The drive circuit board 3c is a board using TAB (Tape Automated Bonding). The source driver IC 3 d is a circuit component that applies an applied voltage to each pixel, and a plurality of source drivers IC 3 d are arranged in a straight line between the BL case 2 and the outer peripheral portion 4 c of the chassis 4 along the left-right direction. Each source driver IC 3 d is in close contact with the inner surface of the outer peripheral portion 4 c of the chassis 4 via the heat conductive sheet 9.

The chassis 4 includes a front surface portion 4b and an outer peripheral portion 4c. The front surface portion 4b has a front surface opening 4a disposed to face the front surface of the liquid crystal panel 3, and the outer peripheral portion 4c is formed by bending four edges of the front surface portion 4b. It arrange | positions facing the part 3e. The outer peripheral part 4c surrounds the liquid crystal panel 3, the drive circuit board 3c, and the BL case 2 from the outside, and a plurality of openings 4d are formed in the left-right direction at positions corresponding to the lower end part 3b of the liquid crystal panel 3. Yes. The bezel 5 has an outer periphery 5a that covers the chassis 4 from the outside. A plurality of openings 5b are formed in the outer periphery 5a across the left-right direction at positions facing the openings 4d of the outer periphery 4c.
The drip-proof member 6 is formed of a film material, and a part of the drip-proof member 6 is positioned between the liquid crystal panel 3 and the front surface portion 4 b of the chassis 4 in a state where the drip-proof member 6 is attached to a portion near the outer peripheral edge of the liquid crystal panel 3. The drip-proof member 6 has a close contact portion 6a that is opposed to and in close contact with an adhesive or the like on the front surface in the immediate vicinity of the lower end portion 3b of the liquid crystal panel 3. A portion extending from the close contact portion 6a to the outer periphery portion 5a is a groove forming portion 6c, and a groove portion 6b described later is formed. The groove 6b is formed by pushing a part of the film material backward (see arrow 1b), and the portion near the lower end of the groove forming portion 6c penetrates the opening 4d of the chassis 4 and further opens the bezel 5 It has reached part 5b.

FIG. 4 is an exploded perspective view (A) and a side sectional view (B) for explaining the drip-proof member 6.
As the groove 6b, two different sizes of grooves 6f and 6g having a substantially Y shape are shown in this example. Hereinafter, the larger one is referred to as Y groove 6f, and the smaller one is referred to as y groove 6g. The plurality of Y grooves 6f and y grooves 6g are alternately arranged along the left-right direction (see arrows 1c and 1d) in a state where a part of each of the Y grooves 6f and the y groove 6g overlap each other when viewed from the panel lower end 3b.
The drip-proof member 6 has a chassis film portion 6h at the lower end where the Y groove 6f and the y groove 6g are formed. A slit-shaped notch 6k is formed between the chassis film portions 6h respectively corresponding to the Y groove 6f and the y groove 6g adjacent thereto. The chassis film portion 6 h has a width that allows the chassis film portion 6 h to be inserted into the opening 4 d formed in the outer peripheral portion 4 c of the chassis 4. An exterior film portion 6 i is provided at the lower end portion of the chassis film portion 6 h and is inserted through the opening 5 b of the bezel 5. The lower end portion of the vertical groove extending in the vertical direction among the Y groove 6f and the y groove 6g reaches the exterior film portion 6i, and a notch 6m is formed between the adjacent exterior film portions 6i.

Next, the flow of droplets attached to the surface of the liquid crystal panel 3 will be described.
The water droplet 10 adhering to the surface of the liquid crystal panel 3 falls along the front surface of the close contact portion 6a of the drip-proof member 6 as indicated by the broken arrow 6j. Then, the water droplet 10 enters one of the two inclined grooves opened upward in the Y groove 6f or the y groove 6g. As described above, the Y groove 6f and the y groove 6g are arranged so that a part of each of the Y groove 6f and the y groove 6g overlap each other when viewed from the panel lower end 3b. Therefore, even if the water droplet 10 flows from any position in the left-right direction (see arrows 1c and 1d in FIG. 4) of the drip-proof member 6, it always flows down to any one of the groove portions 6b (Y groove 6f, y groove 6g). The water droplets 10 are quickly discharged out of the bezel 5 through the vertical grooves extending in the vertical direction among the Y grooves 6f and the y grooves 6g.

In this example, a part of the film material is pushed backward (see arrow 1b in FIG. 4) at the groove 6b to form the Y groove 6f and the y groove 6g. Not limited to this, a part of the film material may be pushed forward (see arrow 1a in FIG. 4) to form the Y groove 6f and the y groove 6g. Further, the shape of the groove 6b is not limited to the Y shape, and may be any shape that can promptly guide the water droplet 10 out of the outer periphery 5a. Or you may form a groove | channel in the surface near the outer periphery of a display panel. These matters are the same in other embodiments described later.
As described above, in the first embodiment, the water droplet 10 attached to the surface of the liquid crystal panel 3 can be discharged out of the apparatus by the groove 6 b of the drip-proof member 6. That is, when the water droplet 10 adheres and flows down below the liquid crystal panel 3 (see the arrow 1e in FIG. 4), the water droplet 10 is quickly discharged out of the liquid crystal display device 1 along the groove 6b. Further, a part of the drip-proof member 6 is fixed to the liquid crystal panel 3, and the groove forming part 6c divides the front part (see arrow 1a in FIG. 4) and the rear part (see arrow 1b in FIG. 4). . As a result, the flow path of droplets to the drive circuit components is blocked. That is, the drive circuit board 3c and the source driver IC 3d disposed behind the liquid crystal panel 3 and in the vicinity of the panel lower end 3b are protected from the intrusion of the water droplet 10 by the groove forming portion 6c of the drip-proof member 6. In addition, the shielding effect by the drip-proof member 6 is further enhanced by increasing the width of the chassis film portion 6h and reducing the notch portion 6k.
According to the first embodiment, the drip-proof member 6 can prevent harmful effects caused by the ingress of liquid droplets without providing a front panel on the display panel.

[Second Embodiment]
Next, a second embodiment of the present invention will be described. The difference from the first embodiment is that the shape of the groove forming portion 6c of the drip-proof member 6 and a part of the optical film 16 are processed to form the groove forming portion 16c. Therefore, differences from the first embodiment will be described below, and the same components as those in the first embodiment will be described using the same reference numerals, and detailed description thereof will be omitted. The same applies to other embodiments described later.
FIG. 5 is an exploded perspective view illustrating the groove forming portion 16c of the liquid crystal display device according to the second embodiment.

The optical film 16 is formed of a film material made of a resin such as silicone or acrylic and has a groove forming portion 16c. The groove forming part 16c is an extension part of the optical film 16 in which the groove part 16b is formed from the panel lower end part 3b to the outer periphery part 5a.
The groove 16b is formed by pushing a part of the film material backward (see the arrow 1b in FIG. 5), and the portion near the lower end passes through the opening 4d of the chassis 4 and is further inserted into the opening 5b of the bezel 5. The The groove 16f illustrated as the groove portion 16b includes an inclined groove that forms a certain angle with respect to the vertical direction (see arrows 1e and 1f in FIG. 5), and a vertical groove that extends downward from the groove. That is, the plurality of substantially square-shaped grooves 16f are arranged in the left-right direction (see arrows 1c and 1d in FIG. 5) in a state where a part of adjacent grooves overlaps each other when viewed from the panel lower end 3b. ing.
The groove forming portion 16c has a chassis film portion 16h corresponding to the groove 16f at its lower end portion, and a slit-shaped notch portion 16k is formed between adjacent chassis film portions 16h. The chassis film portion 16 h has a width that allows the width to be inserted into the opening 4 d formed in the outer peripheral portion 4 c of the chassis 4. The chassis film portion 16 h has an exterior film portion 16 i at the lower end, which is inserted through the opening 5 b of the bezel 5. A cutout portion 16m is formed between the exterior film portions 16i.

Next, the flow of the water droplet 10 attached to the surface of the optical film 16 will be described.
The water droplet 10 adhering to the surface of the optical film 16 is transmitted to the groove forming portion 16c as shown by the broken line arrow 16j and enters the groove portion 16b. The inclined grooves of the groove 16f shown in FIG. 5 are arranged so that a part of each of the inclined grooves overlaps when viewed from the lower end portion 3b of the panel. Therefore, in the left-right direction of the groove forming portion 16c (see arrows 1c and 1d in FIG. 5), even if the water droplet 10 flows down from any position, it always flows down from the inclined groove of the groove 16f through the vertical groove, and the bezel 5 It is discharged immediately to the outside.
As described above, in the second embodiment, when the water droplet 10 adheres to the surface of the optical film 16 and flows down below the liquid crystal panel 3, the water droplet 10 moves out of the liquid crystal display device 1 along the groove portion 16b of the groove forming portion 16c. It is discharged promptly. Therefore, the same effect as that of the first embodiment is obtained, and further, the formation of the groove forming portion 16c in the optical film 16 contributes to the reduction of the number of parts.

[Third Embodiment]
Next, a third embodiment of the present invention will be described. The liquid crystal display device 1 according to the third embodiment can be used in a state where the display unit is installed horizontally (hereinafter referred to as a horizontal installation state) and a state where the display unit is installed vertically (hereinafter referred to as a vertical installation state). is there. That is, the display unit is rotatably supported by a rotation mechanism (not shown), and the user can change the display unit to the horizontal installation state or the vertical installation state according to the purpose of use.
FIG. 6 is an exploded perspective view illustrating the drip-proof member 26 of the liquid crystal panel 3 according to the third embodiment, and shows a horizontally installed state of the liquid crystal panel 3. In FIG. 6, the chassis 4 and the bezel 5 are divided. This is because the chassis film portion 26h and the exterior film portion 26i are easily fitted into the opening 4d and the opening 24d, and the opening 5b and the opening 25b, respectively.
When the liquid crystal panel 3 is vertically installed, the opening 24d of the chassis 4 has the same shape and function as the opening 4d on the panel lower end 3b side (the portion near the right end of the chassis 4 in the drawing). The opening 25b formed in the bezel 5 has the same shape and function as the opening 5b.

In the horizontal installation state or the vertical installation state in which the user rotates the liquid crystal panel 3, the drip-proof member 26 has a close contact portion 26 a that is in close contact with the front face at a position that becomes the panel lower end portion 3 b. It is attached by. A plurality of Y grooves 26f are formed in the groove forming part 26c in which the groove part 26b is formed from the panel lower end part 3b to the outer periphery part 5a. The groove 26b is formed by pushing a part of the film material backward (see arrow 1b in FIG. 6), and the end of the groove 26b penetrates the opening 4d and the opening 24d of the chassis 4 respectively. It reaches the opening 5b and the opening 25b.
The Y grooves 26f formed in the groove 26b have the same shape, and are arranged along the left-right direction (see arrows 1c and 1d in FIG. 6) and the vertical direction (see arrows 1e and 1f in FIG. 6). Adjacent Y grooves 26f are connected by at least a part (in this example, refer to a coupling part 26n in which one of two inclined grooves is coupled) to form one continuous groove part 26b. The close contact portion 26a and the groove forming portion 26c are substantially L-shaped when viewed from the front of the liquid crystal panel 3 (see FIG. 7). In the bent portion whose direction changes from the left-right direction to the up-down direction, adjacent Y grooves 26f are connected to form a continuous groove as shown by the coupling portion 26p.
The drip-proof member 26 has a chassis film portion 26 h, and the width thereof is a length that can be inserted into the openings 4 d and 24 d of the chassis 4. A slit-like cutout 26k is formed between the chassis film portions 26h. An exterior film part 26i is provided at the end of the chassis film part 26h, and the width thereof is a length that can be inserted into the openings 5b and 25b of the bezel 5. A cutout portion 26m is formed between the exterior film portions 26i.

FIG. 7A is a diagram illustrating a horizontal installation state of the liquid crystal panel 3 according to the present embodiment, and FIG. 7B is a diagram illustrating a vertical installation state thereof.
Hereinafter, the flow of the water droplet 10 when the water droplet 10 adheres to the surface of the liquid crystal panel 3 will be described. The Y groove 26f is shown in a simplified manner.
In the horizontal installation state of the liquid crystal panel 3 shown in FIG. 7A, the water droplet 10 attached to the surface of the liquid crystal panel 3 is transmitted to the groove forming portion 26c and enters the groove portion 26b as indicated by the broken arrow 26j. In the groove portion 26b, a Y groove 26f is formed continuously in the left-right direction (see arrows 1c and 1d in FIG. 7). For this reason, even if the water droplet 10 flows down from any position in the left-right direction of the liquid crystal panel 3, it always flows down into the groove portion 26b and is quickly discharged out of the bezel 5 through any Y groove 26f.

When the user rotates the display unit, the vertical installation state shown in FIG. This is immediately after the liquid crystal panel 3 is rotated clockwise at an angle of 90 ° in the rotation direction (see arrow 1g) from the state in which the water droplets 10 adhere to the surface of the liquid crystal panel 3 as shown in FIG. It is a state. Since the water droplet 10 falls in the direction of gravity, it falls down in the direction indicated by the broken arrow 26q. Since the groove part 26b is formed continuously, even if the water droplet 10 flows down from any position of the liquid crystal panel 3, it always flows down to the groove part 26b and is quickly discharged out of the bezel 5. After the posture change to the vertical installation state, the water droplets 10 that have flowed down into the Y groove 26f of the groove portion 26b located on the left side of the liquid crystal panel 3 shown in FIG. 7B are sequentially transferred from the coupling portion 26p to the adjacent Y groove 26. It will be transmitted. Further, the water droplet 10 is discharged from the Y groove 26 of the groove portion 26 b located at the left end on the lower side of the liquid crystal panel 3. The water droplet discharging effect by the groove 26b is exhibited even when the liquid crystal panel 3 is rotated from the horizontally installed state to the vertically installed state, as in the case where the liquid crystal panel 3 is rotated from the vertically installed state to the horizontally installed state.
As described above, according to the third embodiment, the water droplet 10 attached to the surface of the liquid crystal panel 3 can be quickly discharged out of the apparatus along the groove 26b. Furthermore, when the orientation of the liquid crystal panel 3 is changed, the water droplet 10 can be quickly discharged even if the user rotates it with the water droplet 10 attached to the surface of the liquid crystal panel 3.

DESCRIPTION OF SYMBOLS 1 Liquid crystal display device 3 Liquid crystal panel 3a Display area 3c Drive circuit board 3d Source driver IC
4 Chassis 4c Chassis outer peripheral part 4d Opening part 5 Bezel 5b Opening part 6 Drip-proof member 6a Adhering part 6b Groove part 6c Groove formation part 6f, 6g Groove

Claims (8)

A display device having a display panel having a display area, a member covering the periphery of the display panel, and a drip-proof means provided in the display panel,
The drip-proof means is provided with a groove for discharging droplets adhering to the surface of the display panel to the outside of the device,
A display device, wherein an opening that penetrates the groove is formed in a member that covers the periphery of the display panel. A chassis member that covers the outer peripheral edge of the display panel and an exterior member that surrounds the chassis member are provided,
The drip-proof means formed of a film material is
A close contact portion that is in close contact with the surface of the outer peripheral edge of the display panel;
The display device according to claim 1, comprising the groove portion having a plurality of grooves formed over an outer peripheral edge portion of the display panel.   The display device according to claim 1, wherein the drip-proof unit is a part of an optical film attached to a surface of the display panel, and the groove is formed in the optical film. The display panel can be changed to a horizontal installation state in which the posture is used horizontally or a vertical installation state in which the display panel is used vertically.
2. The drip-proof device is provided at a position that is a lower side of the display panel in the horizontal installation state and the vertical installation state, and a plurality of grooves are formed in the groove portion. 4. The display device according to any one of items 3.   The display device according to claim 4, wherein the plurality of grooves are connected by joining a part thereof.   The display device according to claim 1, wherein the groove portion includes a vertical groove extending in a vertical direction and an inclined groove that is continuous with the vertical groove and is inclined with respect to the vertical direction.   The display device according to claim 6, wherein the inclined groove overlaps when viewed from a lower side of the display panel. A circuit component for driving the display panel is disposed between the outer periphery of the chassis member and the exterior member,
8. The display device according to claim 2, wherein a groove forming portion in which the plurality of grooves are formed by the drip-proof means blocks a flow path of liquid droplets to the circuit component. 9.

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