JP2012220698A - Thin display device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a thin display device capable of improving heat radiation efficiency and accommodating a plurality of circuit board layouts.SOLUTION: In a thin display device 1, an LCD module 10 and a body unit 20 are assembled into a structure in the following manner: A cable 30 is connected to an LCD circuit board 16 mounted on the back side of the LCD module 10 and is held by a cable clamp 31. Next, the body unit 20 is attached to the LCD module 10 from the back side. Then, a cable 40 is pulled out to the back side of a holder 21 through a fan mounting hole 21c and connected to a body circuit board 22, and is held by an edge saddle 24 provided on a notch 21e in the fan mounting hole 21. Then, finally, an axial fan 23 is fixed to the holder 21 by screws 41.

Description

  The present invention relates to an internal structure of a thin display device.

  In recent years, thin display devices using thin display panels such as a liquid crystal panel (LCD) and a plasma panel (PDP) have been used in consumer television receivers and various business applications. For this reason, a general thin display device is composed of a display module with versatility and a main unit that meets specific specifications, and a structure that supports various specifications by changing the circuit board mounted on the main unit. It has become.

  The thin display device having the above structure has an assembly procedure for attaching the exterior and the stand after attaching the main unit to the display module. When attaching the main unit to the display module, each circuit board is connected with a cable. Connecting. In addition, in the thin display device having this structure, there is also a device that radiates heat generated in the display module by forming an air path (duct) between the display module and the main unit and ventilating with a fan.

  Hereinafter, a conventional thin display device will be described with reference to the drawings using a structure using an LCD module. FIG. 7 is an exploded view of a thin display device according to the prior art.

  The thin display device 101 has a structure in which an LCD module 110 for displaying an image and a main unit 120 are accommodated in an exterior casing (not shown). The LCD module 110 has a structure in which a backlight is mounted on the back side of the LCD panel and is held by a chassis 111 having a function of radiating heat. An LCD circuit board 112 is mounted on the back side of the chassis 111.

  The main unit 120 has a structure in which a main circuit board 122 and an axial fan 123 are mounted on the back side of a box-shaped holder 121 that covers the LCD module 110 from the back side. On the back side of the holder 121, a mounting shape of the mounted component, an intake hole 121a, and an opening hole 121b for a cable are provided. When attaching the LCD module 110 and the main unit 120, the cable 130 having one end connected to the LCD circuit board 112 is passed through the cable opening hole 121 b and connected to the main circuit board 122.

  In addition, in the prior art, a cable mounting structure in which an LED component is provided at one end and a connector larger than the LED component is provided at the other end, the opening hole is a Dharma hole connecting two large and small holes of different sizes. A structure in which the LED component is held in a small hole after being configured and passed through a connector through a large hole has also been proposed. (See Patent Document 1).

JP-A-6-58537

  However, in the above-described prior art, in order to connect the circuit board of each of the display module and the main unit with a cable, it is necessary to provide an opening hole larger than the connector outer shape of the cable in the holder and pass the cable. For example, a thin coaxial cable generally used for video signal transmission has a connector outer shape of about 50 poles of about 37 mm × 4 mm, whereas the cable is about φ4 mm in a bundled state. Even if it is used, the opening hole has a large opening area after passing through the connector.

  In this structure, the display module is covered with a holder, a duct is formed, and heat is radiated by ventilation with a fan. Therefore, there is a problem that the opening hole functions as a vent hole and it is difficult to obtain desired cooling characteristics. Also, since the main unit may change the circuit board to be mounted according to the specifications, if an opening hole is provided, the area on which the circuit board can be placed is limited, so it must support multiple types of circuit board layouts. It was difficult.

  The present invention has been made in view of the above problems, and aims to improve the deterioration of heat dissipation due to an opening hole for connecting a cable between circuit boards and to easily cope with a plurality of board layouts. Yes.

  A thin display device according to the present invention is a thin display device including a display module, a main body unit provided on the back surface of the display module, and an exterior casing covering them, and the display module includes a display panel for displaying an image, A chassis that holds the display panel on the back side, and a panel circuit board that drives the display panel mounted on the back side of the chassis, and the main unit supplies video signals and power to the panel circuit board A holder having a main circuit board and a fan for cooling the display module is mounted, and a notch shape is provided in the fan mounting hole for ventilation and the fan mounting hole at a position facing the fan of the holder, and the notch A cable for connecting the panel circuit board and the main circuit board is held in a shape.

  According to the present invention, when connecting the circuit module connection cable between the display module and the main unit, the cable connector is passed through the fan mounting hole provided in the holder, and the cable is held in the notch shape. To do. For this reason, since the notch shape which becomes an opening after fan installation can be made into the substantially same shape as a cable external shape, it becomes possible to make an opening area small. With the above structure, it is possible to reduce the deterioration of heat dissipation due to the opening holes for connecting the cables between the circuit boards, and it becomes easy to cope with a plurality of board layouts.

External view of thin display device according to the present invention Exploded view of a thin display device according to the present invention Exploded view of LCD module according to the present invention Exploded view of the main unit according to the present invention Assembly drawing of LCD module and main unit according to the present invention Detailed view of cable connection work according to the present invention Exploded view of a thin display device according to the prior art

[Example 1]
The first embodiment of the present invention will be described below with reference to the drawings.

  The structure of the thin display device of the present invention will be described with reference to FIGS. FIG. 1 is an external view of a thin display device according to the present invention, and FIG. 2 is an exploded view.

  The thin display device 1 has a structure in which an LCD module 10 and a main unit 20 for displaying an image on the front side are accommodated by a bezel 2 from the front side and a rear cover 3 from the back side. In addition, the thin display device 1 is held from the back side by a stand 50 or a wall mount (not shown).

  Next, the LCD module of the present invention will be described with reference to FIG. FIG. 3 shows an exploded view of the LCD module according to the present invention.

  The LCD module 10 has a structure in which an LED substrate on which light emitting diodes (hereinafter referred to as LEDs) are mounted at substantially equal intervals is arranged as a direct backlight 12 on the back side of the LCD panel 11. The LCD panel 11 is held by being sandwiched between a front case 13 and a rear case 14 of a frame having openings on the front side and the back side. A chassis 15 holding the backlight 12 is disposed in the opening on the back side of the rear case 14, and the backlight 12 is sealed by the LCD panel 11, the rear case 14, and the chassis 15.

  Although not shown, optical members such as a diffusion plate and a reflection plate are disposed between the LCD panel 11 and the backlight 12. The material of the chassis 15 is a plate material such as aluminum having good thermal conductivity, and has a function of transferring heat generated by the backlight 12 to dissipate it to the back side. An LCD circuit board 16 that drives and controls the LCD panel 11 and the backlight 12 is mounted on the rear side of the chassis 15. In addition, screw holes 13 a are provided on the top surface side, bottom surface side, and left and right side surfaces of the front case 13.

  Next, the main unit of the present invention will be described with reference to FIG. FIG. 4 shows an exploded view of the main unit according to the present invention.

  The main unit 20 has a structure in which a main circuit board 22 and an axial fan 23 are mounted on the back side of the holder 21. The shape of the holder 21 is a box shape having an opening on the front side so as to cover the LCD module 10 from the back side, and a mounting hole 21a is provided on the surrounding wall at a position facing the screw hole 13a of the front case. . In addition, on the back side of the holder 21, an intake hole 21 b, a fan mounting hole 21 c for the axial fan 30 and a screw hole 21 d are provided. A notch shape 21e is provided in a part of the fan mounting hole 21c, and an edge saddle 24 for holding a cable made of a resin material is engaged therewith. The main body circuit board 22 has a function of supplying an externally input video signal and power to the LCD module 10 and the LCD circuit board 16.

  The assembly structure and effects of the thin display device of the present invention will be described. FIG. 5 is an assembly view of the LCD module and the main unit according to the present invention, and FIG. 6 is a detailed view of cable connection work.

  The assembly structure of the thin display device 1 is a structure in which the exterior and the stand are attached after the LCD module 10 and the main unit 20 which are internal structures are attached. The operation of attaching the main unit 20 to the LCD module 10 will be described. First, the cable 30 for connection with the main body circuit board 22 is connected to the LCD circuit board 16 and is held by the cable clamp 31 in the vicinity of the position facing the axial fan 23 and the fan mounting hole 21c of the main body unit 20. Next, the main unit 20 in a state where the axial fan 23 is not mounted is fixed to the LCD module 10 with a mounting screw 40 from the back side. Next, the cable 40 and the connector are taken out from the fan mounting hole 21c to the back side of the holder, and the cable 40 is held by the notch shape 21e and connected to the holding body circuit board 22. Further, the cable 40 is held on the edge saddle 24. Finally, the axial fan 23 is fixed to the holder 21 with screws 41.

  Due to the above structure, when connecting the cable for connecting the display module and the circuit board of the main unit, the cable connector is passed using the mounting holes of the fan provided in the holder, and the cable is held in the notch shape. . For this reason, since the notch shape which becomes an opening after fan installation can be made into the substantially same shape as a cable external shape, it becomes possible to make an opening area small. With the above structure, it is possible to reduce the deterioration of heat dissipation due to the opening holes for connecting the cables between the circuit boards, and it becomes easy to cope with a plurality of board layouts.

  In a thin display device, an axial fan having an outer dimension of □ 40 mm to □ 120 mm is generally used. The dimension of the fan mounting hole corresponding to a 40 mm fan is about 38 mm. In general, a cable used for video signal transmission is a thin coaxial cable having about 50 poles, and the external dimensions of the connector are about 37 mm × 4 mm. The dimensions of the fan mounting hole are □ 38 mm and the diagonal dimension is about 54 mm (≈38 × √2). Therefore, if the connector is tilted slightly, the connector can be passed with a margin. For this reason, the present invention can be applied without selecting a particularly large axial fan or a small connector.

DESCRIPTION OF SYMBOLS 1 Thin display apparatus 2 Bezel 3 Rear cover 10 LCD module 11 LCD panel 12 Backlight 13 Front case 14 Rear case 15 Chassis 16 LCD circuit board 20 Main body unit 21 Holder 22 Main body circuit board 23 Axial fan 24 Edge saddle 30 Cable 31 Cable clamp 40, 41 Screw 50 Stand 101 Thin display device 110 LCD module 111 Chassis 112 LCD circuit board 120 Main unit 121 Holder 122 Main circuit board 123 Axial fan 130 Cable

Claims (2)

A thin display device comprising a display module, a main body unit provided on the back surface of the display module, and an outer casing covering the display module, wherein the display module includes a display panel for displaying an image and a chassis for holding the display panel on the back surface A panel circuit board that drives the display panel mounted on the rear side of the chassis, and the body unit includes a body circuit board that supplies video signals and power to the panel circuit board, and a fan for cooling the display module The fan mounting hole for ventilation and a notch shape are provided in the fan mounting hole at a position facing the fan of the holder, and the panel circuit board and the main body circuit board are formed in the notch shape. A thin display device characterized by holding a connection cable. The thin display device according to claim 1, wherein a hole size of the fan mounting hole is larger than a connector outer shape of the cable.