JP2015011038A - Panel unit and liquid crystal display device including the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a panel unit capable of preventing intrusion of a foreign substance such as dust between a liquid crystal panel and an optical sheet or between optical sheets and capable of improving assembling property as much as possible, and to provide a liquid crystal display device including the panel unit.SOLUTION: The panel unit includes: a panel module 30 including a liquid crystal panel 31 and one or a plurality of optical sheets 35 layered on a back side of the liquid crystal panel; a corner frame 43, 43a covering at least a corner of the panel module; and a middle frame 40, 40a covering at least a part of a side face of the panel module.

Description

  The present invention relates to a panel unit and a liquid crystal display device including the panel unit. More specifically, the present invention includes a panel unit that improves assemblability by unitizing a liquid crystal panel and an optical sheet and the same. The present invention relates to a liquid crystal display device.

  In a liquid crystal display device, an optical sheet such as a diffusion plate, an optical film, or a polarizing plate is laminated on the back surface of a liquid crystal panel, and images and the like are displayed by irradiating a backlight from the back side (for example, Patent Document 1). reference).

The liquid crystal display device is assembled in the following manner.
First, place the back cabinet horizontally with the opening side facing up, and attach the backlight to the back cabinet. Subsequently, optical sheets such as a diffusion plate, an optical film, and a polarizing plate are sequentially laminated on the cabinet so as to face the backlight, and a liquid crystal panel is further placed thereon. Next, the front cabinet whose front is opened is fixed together with the back cabinet. Thereafter, the whole is turned over so that the front cabinet faces downward, and various components such as a circuit board are attached to the back side of the back cabinet.

JP 2012-14000 A

  When foreign matter such as dust or dirt enters between the liquid crystal panel and the optical sheet or between the optical sheets, the foreign matter appears as a shadow. Therefore, it is necessary to assemble the liquid crystal display device from the beginning to the end in a clean room. In recent years, since the screen size of the liquid crystal display device has increased, a large clean room is required. Also, in such a liquid crystal display device, maintenance such as replacement of the backlight cannot be performed at the installation site, and must be performed in the clean room.

  SUMMARY OF THE INVENTION An object of the present invention is to provide a panel unit capable of preventing foreign matters such as dust from entering between a liquid crystal panel and an optical sheet or between optical sheets, and improving assemblability as much as possible, and a liquid crystal display device having the panel unit Is to provide.

The panel unit according to the present invention is
A panel module comprising a liquid crystal panel and one or more optical sheets laminated on the back side of the liquid crystal panel;
A corner frame covering at least a corner of the panel module;
A middle frame covering at least a part of a side surface of the panel module;
With

Further, a liquid crystal display device comprising the panel unit according to the present invention,
The panel unit;
A back cabinet attached to the back side of the panel unit;
With

  According to the panel unit of the present invention, the liquid crystal panel and the optical sheet are previously unitized. Accordingly, since only the panel unit needs to be assembled in the clean room, the assemblability of the liquid crystal display device can be enhanced as much as possible. Further, since the liquid crystal panel or the like is unitized, there is no possibility that dust or the like enters the panel unit. Accordingly, maintenance such as replacement of the backlight can be performed at the installation site.

FIG. 1 is an exploded perspective view of a liquid crystal display device including a panel unit according to the present invention as viewed from the front side. FIG. 2 is an exploded perspective view of the panel unit according to the embodiment of the present invention. FIG. 3 is a perspective view of a back cabinet equipped with an LED bridge. FIG. 4 is a perspective explanatory view in which an LED bridge is mounted on the front cabinet side. FIG. 5 is a different perspective view of the liquid crystal display device.

  Hereinafter, a panel unit (20) according to an embodiment of the present invention and a liquid crystal display device (10) including the panel unit will be described with reference to the drawings.

  As a whole structure, as shown in FIG. 1, the liquid crystal display device (10) according to the present invention includes a front cabinet (50) on the front side of the panel unit (20), a reflection panel (73) and a back cabinet ( 60), and a stand (12) can be mounted on the lower surface side.

  The liquid crystal display device (10) according to the present invention can be assembled with the front cabinet (50), the back cabinet (60), and the like outside the clean room after the panel unit (20) is assembled in a clean room in advance.

  As shown in FIG. 2, the panel unit (20) includes a panel module (30), corner frames (43) (43a) covering at least corners of the panel module (30), and side surfaces of the panel module (30). A middle frame (40) (40a) covering at least a part thereof.

  The panel module (30) includes a liquid crystal panel (31) and one or more optical sheets (35) stacked on the back side of the liquid crystal panel (31).

  In the liquid crystal panel (31), a TCP (tape carrier package) tape is led out from the edge. They are connected to a liquid crystal substrate (32) provided on the liquid crystal panel (31). The liquid crystal substrate (32) is electrically connected to the substrate (64) of the liquid crystal display device (10) via the central connector (33).

  Further, the optical sheet (35) is a sheet having substantially the same size as the liquid crystal panel (31), and can be configured by laminating one or a plurality of diffusion plates, optical films, polarizing plates, and the like. The type of optical sheet (35) and the number of stacked sheets are not limited to the illustrated example.

  The optical sheet (35) preferably has an ear piece (36) provided with a screw hole at least at one corner. When the first corner frame (43) and the second corner frame (43a) described below are screwed (80), the ear piece (36) is fixed to the first corner frame (43) and the second corner frame ( 43a) is screwed (80) to position and fix the optical sheet (35).

  The panel unit (20) can be assembled by placing the liquid crystal panel (31) on corner frames (43) arranged at a predetermined interval as shown in FIG.

  As shown in FIG. 2, the corner frame is composed of a first corner frame (43) that contacts the front side of the liquid crystal panel (31) and a second corner frame (43a) on the back side of the panel module (30). Can do.

  The first corner frame (43) and the second corner frame (43a) are each formed in a square shape. The first corner frame (43) is formed with a bottomed screw hole toward the back side at a position protruding outward from a corner bent substantially at a right angle. The second corner frame (43a) is also formed with a through screw hole at a position protruding outward from a corner bent substantially at a right angle.

  The first corner frames (43) having the above-described configuration are arranged at a predetermined interval, and the liquid crystal panel (31) is placed thereon so that the back surface faces upward as shown in FIG. In the illustrated example, the liquid crystal panel (31) is disposed on the liquid crystal substrate (32) so as to be on the lower side when the liquid crystal display device (10) is installed so that its longitudinal direction is horizontal.

  Next, the middle frame (40) (40a) is disposed on the periphery of the liquid crystal panel (31). The middle frame (40) (40a) is a frame that covers each side surface of the liquid crystal panel (31), and preferably has a length that covers the entire length of each side surface as illustrated.

  The middle frame (40) (40a) is preferably made of metal in order to prevent the liquid crystal panel (31) from being affected by EMC (Electro-Magnetic Compatibility). In the drawing, the middle frames (40) and (40a) have a length substantially equal to the length on each side of the liquid crystal panel (31). A rectangular frame connecting the frames (40) and (40a) can also be used.

  The middle frames (40) and (40a) cover the side surfaces of the liquid crystal panel (31) and the optical sheet (35) to be placed next to prevent dust and the like from entering the liquid crystal panel (31). The above-described EMC noise is prevented.

  It is desirable that the middle frame (40) (40a) is provided with a spacer (41) projecting inwardly so as to have a substantially T-shaped cross section along the longitudinal direction. The spacer (41) is sandwiched between the back surface of the liquid crystal panel (31) and the optical sheet (35), thereby maintaining a predetermined distance between the liquid crystal panel (31) and the optical sheet (35). it can.

  After the middle frames (40) and (40a) are arranged on the periphery of the liquid crystal panel (31), the optical sheets (35) are sequentially stacked on the back side of the liquid crystal panel (31). In the case where the spacer portion (41) is provided in the middle frame (40) (40a), the optical sheet (35) close to the liquid crystal panel (31) comes into contact with the spacer portion (41). Further, the ear piece (36) of the optical sheet (35) is fitted and positioned at the corner of the first corner frame (43).

  After placing the optical sheet (35), the second corner frame (43a) is mounted so as to cover the corner of the optical sheet (35) on the backmost surface, and screwed (80). Thereby, a panel unit (20) is produced.

  Since the panel unit (20) is assembled in a clean room, dust or the like does not enter between the liquid crystal panel (31) and the optical sheet (35) and between the optical sheets (35).

  The assembled panel unit (20) becomes a liquid crystal display device (10) by mounting the front cabinet (50) and the back cabinet (60). The subsequent assembly process can be performed outside the clean room. Of course, it can also be performed in a clean room.

  As shown in FIG. 1, the front cabinet (50) is a frame in which a rectangular window (52) is formed, and a step ( (Not shown) is formed. In addition, a plurality of bottomed screw holes for screwing (82) are provided on the periphery of the stepped portion.

  FIG. 3 is an exploded perspective view of the back cabinet 60 as viewed from the front side. The description will be made with reference to the perspective view of the back cabinet 60 included in FIG.

  As shown in FIG. 3, the back cabinet (60) has a concave shape on the back side, and is assembled to the panel unit (20) described above.

  The back cabinet (60) can be made of resin, and as shown in FIG. 1, a substrate (64) is attached to the approximate center inside the back side. By providing the substrate (64) in the back cabinet (60) in this way, the appearance from the back side can be slimmed. Further, by arranging the substrate (64) in the back cabinet (60) in advance, it is not necessary to turn the back cabinet (60) over to mount the substrate.

  The back cabinet (60) has a plurality of ribs (61) projecting from the back to the front. These ribs (61) are fitted with a bridge (72) for attaching a backlight (70) described later. By forming the ribs (61) more densely than necessary, it is possible to widen the selection range of the mounting position and the number of installed bridges (72) according to the backlight (70).

  The back cabinet (60) is inclined on the upper surface side, and a plurality of vent holes (62) are formed. In addition, a plurality of vent holes (63) are formed at the lower back side of the back cabinet (60), and outside air is introduced into the back cabinet (60) from the lower vent holes (63). Taking away the heat released inside (60), the warmed air is discharged from the upper vent (62).

  Furthermore, the lower surface of the back cabinet (60) has a shape in which the left and right sides swell toward the back surface, and the speaker (14) is disposed therein as shown in FIG. As shown in FIG. 3, the back cabinet (60) has a plurality of audio output holes (65) on the lower surface facing the speaker (14).

  In addition, a metal reinforcing plate (66) for attaching the stand (12) is attached to substantially the center of the lower surface of the back cabinet (60).

  As shown in FIGS. 1 and 3, a backlight (70) is disposed on the front side of the back cabinet (60). An LED (light emitting diode) (71) can be employed as the backlight (70). The LED (71) is mounted on the substrate (71a) and electrically connected to the substrate (64) to control light emission.

  The LEDs (71) can be arranged at predetermined intervals via a substrate (71a) on a plurality of bridges (72) suspended in the left-right direction of the back cabinet (60). The bridge (72) is screwed (84) to the aforementioned rib (61). The bridge (72) is made of metal and is bent with a side portion along the longitudinal direction facing rearward. By making the U-shaped cross section toward the back, the heat dissipation of the LED (71) and the strength of the bridge (72) itself can be increased as much as possible.

  As shown in FIG. 1, the front side of the back cabinet (60) is covered with a reflective panel (73) so that the light emitted from the LED (71) is efficiently applied to the panel module (30). The reflective panel (73) is white on the front side in order to increase the light reflection efficiency, and a plurality of LED holes (75) through which the LEDs (71) project are opened. The reflection panel (73) has a horizontal length that is substantially the same as the back cabinet (60), and the vertical length is equivalent to the amount of the speaker (14) and the like placed in the back cabinet (60). Shorter than the back cabinet (60).

  The reflection panel (73) is attached to the back cabinet (60) so that the LED (71) protrudes from the LED hole (75).

  Assembling the front cabinet (50), panel unit (20), and back cabinet (60) described above, first, as shown in FIG. 1, with the back cabinet (60) arranged upward, the panel unit (20) The connector (33) of the liquid crystal substrate (32) is electrically connected to the substrate (64), and the panel unit (20) is disposed in the back cabinet (60).

  Next, the assembly of the liquid crystal display device (10) is completed by covering the front cabinet (50) and screwing the back cabinet (60) and screws (82). If necessary, the stand (12) can be screwed (86) to the lower surface of the back cabinet (60).

  FIG. 4 is a perspective view showing a state in which the back cabinet 60 is removed for explanation. FIG. 5 is also an exploded perspective view of the liquid crystal display device (10) of the present invention. The construction of the present invention will be better understood with reference to both the drawings.

  According to the present invention, only the assembly of the panel unit (20) is performed in the clean room, and the other steps can be performed outside the clean room. Therefore, the use efficiency of the clean room can be increased, and the assemblability can be improved. . Therefore, application to a large liquid crystal display device (10) is particularly suitable.

  Further, since the liquid crystal panel (31) and the like are unitized, it is not necessary to disassemble the panel unit (20) during maintenance such as replacement of the backlight (70). Accordingly, there is an advantage that the maintenance does not need to be returned to the clean room and can be performed at the installation location.

  The above description is for explaining the present invention, and should not be construed as limiting the invention described in the claims or limiting the scope thereof. Further, the configuration of each part of the present invention is not limited to the above-described embodiment, and various modifications can be made within the technical scope described in the claims.

(10) Liquid crystal display device
(20) Panel unit
(30) Panel module
(31) LCD panel
(35) Optical sheet
(40) (40a) Middle frame
(43) First corner frame
(43a) Second corner frame
(50) Front cabinet
(60) Back cabinet

Claims (8)

A panel module comprising a liquid crystal panel and one or more optical sheets laminated on the back side of the liquid crystal panel;
A corner frame covering at least a corner of the panel module;
A middle frame covering at least a part of a side surface of the panel module;
A panel unit characterized by comprising. The corner frame includes a first corner frame on the front side of the panel module and a second corner frame on the back side, and the first corner frame and the second corner frame are fixed.
The panel unit according to claim 1. The optical sheet is provided with an ear piece protruding with a screw hole at least at one corner,
The panel unit according to claim 2, wherein the first corner frame and the second corner frame are fixed by screwing the ear pieces. The middle frame has a spacer portion projecting inward, and the spacer portion penetrates between the liquid crystal panel and the optical sheet.
The panel unit according to any one of claims 1 to 3. The panel unit according to any one of claims 1 to 4,
A back cabinet attached to the back side of the panel unit;
A liquid crystal display device. The back cabinet is arranged so that one or more backlights can emit light toward the front surface.
The liquid crystal display device according to claim 5. The backlight is a light emitting diode;
The liquid crystal display device according to claim 6. The back cabinet is made of resin, and a substrate is disposed inside the back side.
The liquid crystal display device according to claim 5.

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