JP2005134591A - Thin display device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To make a thin display device large in size without extending an exhaust fan. <P>SOLUTION: The thin display device is constituted by attaching a display material 4 to the front of an approximately tabular structure 3 formed by die casting, attaching a control circuit 11 for driving the display material 4 to the lower part on the rear surface of the structure 3 by face-to-face connection, and forming radiation fins 2a on the outer side of the portion of the rear cabinet 2 corresponding to the position of the control circuit 11. Also, the materials of a front cabinet 1 and the rear cabinet 2 and the structure 3 are composed of any among an aluminum alloy, zinc alloy and magnesium alloy. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a structure of a thin display device including a liquid crystal panel, a plasma panel, EL (electroluminescence), FED (field emission display) and the like.

In recent years, thin display devices using a liquid crystal panel, a plasma panel, or the like as a display body have a tendency to increase in size. With the increase in size, the power consumption increases due to the increase in screen size and the increase in audio output, resulting in an increase in internal heat generation, resulting in an increase in internal temperature, a decrease in component life, and a decrease in image quality. It has occurred. As a countermeasure, an exhaust fan is sometimes installed to forcibly ventilate hot air in the cabinet. However, when the exhaust fan is attached, wind noise is generated, and there is a problem that noise countermeasures are newly required. Therefore, a “display device” described in Patent Document 1 is conventionally provided as a heat dissipation structure that efficiently exhausts heat generated by the display device without providing an exhaust fan. In order to efficiently discharge the internal heat generated in the display device, heat dissipating fins are provided at the upper part of the rear cabinet that constitutes the rear surface of the display device, and the internal heat generation is collected and discharged to the upper part using air convection. It is a thing. By providing the heat dissipating fins in this way, it is possible to efficiently discharge the heat generated from the display body and the control circuit unit to the outside.
Japanese Patent Laid-Open No. 11-38891

  However, in the above-mentioned “display device”, the installation position of the radiating fin is at the upper part of the rear cabinet. In order to pass through the process of being discharged to the outside after being transmitted, there is a problem that at least the upper part of the inside of the display device is exposed to a high temperature. For example, in the case of a liquid crystal panel, the temperature difference between the upper and lower sides is 10 ° C. or more in the 20V type class. Due to this temperature difference, the screen response speed may change up and down, causing problems in the entire image. Further, as the display device becomes larger and thinner, a structure for maintaining the rigidity of the entire display device has become necessary. Accordingly, the present invention has an object of proposing a thin display device that is rigid and structurally stable while efficiently discharging internal heat generation so as to prevent uneven distribution of high-temperature parts in response to an increase in the size of the thin display device. It was.

  In order to solve the above-described problems, the present invention attaches a display body to the front surface of a substantially flat structure formed by die casting, and attaches a circuit unit for driving the display body to the rear surface of the structure. In addition, the said display body means the whole display apparatus containing the backlight in the case of a liquid crystal display device. More specifically, a substantially flat structure formed by die casting, a display body attached to the front surface of the structure body, and a circuit unit attached to the rear surface of the structure body for driving the display body, etc. Corresponding to the position of the circuit unit, the front cabinet storing and holding the display body from the front, the rear cabinet storing the circuit unit from the rear and the mounting part being attached to the rear surface of the structure by surface connection. And radiating fins formed on the outside of the rear cabinet portion. Here, it is preferable that the circuit portion is attached to a lower portion of the rear surface of the structure. The material of the structure can be any one of an aluminum alloy, a zinc alloy, and a magnesium alloy. Similarly, the material of the front / rear cabinet can be any one of an aluminum alloy, a zinc alloy, and a magnesium alloy. Furthermore, the display body is any one of a liquid crystal panel, a plasma panel, electroluminescence, and a field emission display.

  As described above, according to the present invention, the display body is attached to the front surface of the substantially flat structure formed by die casting, and the circuit unit for driving the display body is attached to the lower rear surface of the structure, The circuit part is housed in the rear cabinet from the rear, and the attachment part of the rear cabinet is attached to the rear surface of the structure by surface connection, and the radiation fins are formed outside the rear cabinet part corresponding to the position of the circuit part. In addition, the rigidity of the entire thin display device is increased, and the heat generated in the circuit unit is discharged to the outside at the lower part of the rear surface of the apparatus, so that the upper part of the apparatus becomes hotter than the lower part. As a result, it is possible to increase the size of the thin display device without providing an exhaust fan while maintaining good image quality.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
FIG. 1 is a longitudinal sectional view showing an internal structure when the present invention is applied to a liquid crystal display device, FIG. 2 is a longitudinal sectional view showing an enlarged main part of FIG. 1, and FIG. It is a cross-sectional view of the main part. As shown in these drawings, the outer peripheral portion of the liquid crystal panel 4 constituting the display body on which an image is displayed is held by the panel frame 7, and the liquid crystal panel 4 is disposed behind the deflecting film 6 and the diffusion plate 5. A backlight composed of a lamp 9 supported by a holder 10 and a reflecting plate 8 is disposed. The reflector 8 is formed in a shallow box shape. The outer edge of the panel frame 7 is fastened by screws with the outer edge of the structure 3 that abuts the back surface of the reflecting plate 8. The structure 3 is formed by die-casting and has a thick, substantially flat plate shape, and is formed in a shape in which the outer peripheral portion rises forward so as to accommodate the back side of the reflecting plate 8, and the control circuit 11 is attached to the lower part of the back surface. It has been.

  The panel frame 7 and the structure 3 assembled in this way are sandwiched between the front cabinet 1 and the rear cabinet 2 from the front and rear. Further, as shown in FIG. 3, heat dissipating fins 2 a having a continuous crank shape are formed outside the position corresponding to the control circuit 11 below the rear cabinet 2. The rear surface side of the structure 3 at a position sandwiching the control circuit 11 is protruded rearward, is connected to the rear cabinet 2 and is fastened with screws, thereby enhancing heat transfer and rigidity. Further, the lower end of the structure 3 is extended downward to form a stand attachment portion 3a conforming to the VESA standard, and a stand (not shown) is attached via the rear cabinet 2. In addition, this stand attaching part 3a can be provided in arbitrary positions, such as a center part, besides the lower end shown in figure. Although not shown, the liquid crystal display device is provided with an operation unit, an LED display unit, and a speaker.

  The front cabinet 1, the rear cabinet 2, and the structure 3 are formed by die-casting using any one of an aluminum alloy, a zinc alloy, and a magnesium alloy that are lightweight and have good thermal conductivity. Thereby, even if a part of the heat generation of the backlight and a part of the heat generation of the control circuit 11 are transmitted to the structure 3, they are discharged to the rear cabinet 2 side through the surface connection portion with the rear cabinet 2. The thickness of the structure 3 is necessary and sufficient to maintain the rigidity of the entire liquid crystal display device. In addition, when there are a plurality of control circuits 11 attached to the lower back surface of the structure 3 such as an inverter circuit, a power supply circuit, and an audio circuit, the calorific value of each circuit is arranged on the whole on average. , Avoiding high temperatures locally. The heat generated in each circuit is discharged to the outside of the rear cabinet 2 by the heat dissipating fins 2a provided in the rear cabinet 2, but the installation position of the heat dissipating fins 2a is not limited to the lower back of the rear cabinet 2, It can be added arbitrarily to the upper back, top, side, bottom, etc. In addition, the shape, size, thickness, and height are determined so that the best heat can be discharged according to the power consumption of the control circuit 11, the amount of heat generation, the temperature distribution on the back surface of the structure 3, and the like.

  As described above, the liquid crystal display device according to the present invention has the structure 3 as a skeleton, and the components are attached to the front and back of the structure 3 and the front and back of the structure 3 are sandwiched between the front cabinet 1 and the rear cabinet 2. Necessary strength and rigidity can be obtained, and the display device can be increased in size. Further, since the heat generated by the control circuit 11 is also discharged to the rear side of the rear cabinet 2 through the radiation fins 2a, the temperature difference generated between the upper and lower sides on the screen is within an allowable range, and the image quality is affected by the temperature difference. Is eliminated. As a result, the display device can be increased in size without adding an exhaust fan. In the illustrated example, the liquid crystal display device has been described. However, plasma panels, electroluminescence, and field emission displays of other display systems can be similarly configured.

  The present invention can be used for plasma panel displays, electroluminescence displays, and field emission displays in addition to liquid crystal display devices.

It is a longitudinal cross-sectional view which shows an internal structure at the time of applying this invention to a liquid crystal display device. It is the longitudinal cross-sectional view which expanded and showed the principal part of FIG. It is a cross-sectional view of the main part of FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Front cabinet 2 Rear cabinet 2a Radiation fin 3 Structure 3a Stand attachment part 4 Liquid crystal panel 5 Diffusion plate 6 Deflection film 7 Panel frame 8 Reflection plate 9 Lamp 10 Holder 11 Control circuit

Claims (6)

A thin display device, wherein a display body is attached to a front surface of a substantially flat structure formed by die casting, and a circuit unit for driving the display body is attached to a rear surface of the structure. A substantially flat structure formed by die casting, a display body attached to the front surface of the structure body, a circuit unit attached to the rear surface of the structure body to drive the display body, and the display body A front cabinet that stores and holds the circuit portion from the front, a rear cabinet that stores the circuit portion from the rear and is attached to the rear surface of the structure by surface connection, and a rear cabinet portion that corresponds to the position of the circuit portion. A thin display device comprising a heat dissipating fin formed on the outside. The thin display device according to claim 1 or 2,

A thin display device, wherein the circuit portion is attached to a lower portion of the rear surface of the structure. The thin display device according to claim 1,

A thin display device characterized in that the structure is made of an aluminum alloy, a zinc alloy, or a magnesium alloy. The thin display device according to any one of claims 1 to 4,

A thin display device characterized in that the front and rear cabinets are made of an aluminum alloy, a zinc alloy, or a magnesium alloy. The thin display device according to any one of claims 1 to 5,

A thin display device, wherein the display body is any one of a liquid crystal panel, a plasma panel, electroluminescence, and a field emission display.

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