JP4333206B2 - Display device structure - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a display device structure of an electronic apparatus having a flat display device such as a portable information processing device.
[0002]
[Prior art]
In recent years, in a portable information processing apparatus such as a notebook personal computer having a flat display device such as a liquid crystal display device, the device itself has been made thinner and lighter in order to improve its portability. On the other hand, improvement in mechanical strength is also required. In particular, since a liquid crystal display device or the like is easily damaged when subjected to an impact, strength is required for a rear housing in which the liquid crystal display device is accommodated. For this reason, a structure for achieving both weight reduction and strength of the rear housing has been devised.
[0003]
FIG. 4 is a perspective view showing an appearance of a conventional display device structure, and FIG. 5 is a sectional view thereof. In the figure, 21 is a liquid crystal display device, 22 is a display surface side housing of the liquid crystal display device 21, 23 is a back housing of the liquid crystal display device 21, and 24 is an inverter control for the backlight of the liquid crystal display device 21. Circuit board. The back housing 23 is provided with a step portion 23c on the flat surface portion 23a, and the central portion of the flat surface portion 23a is raised in a convex shape. And control circuit boards, such as an inverter, are arranged and stored there.
[0004]
By setting it as the said structure, even when the basic thickness of the back housing | casing 23 is made thin, durability with respect to external force can be improved and weight reduction can be achieved.
[0005]
Japanese Patent Application Laid-Open No. H10-228561 discloses a reinforcing case in which the shape of the rear housing is formed in an arc shape.
[0006]
[Patent Document 1]
Japanese Patent Laid-Open No. 2000-311034
[Problems to be solved by the invention]
Such a conventional display device structure has the following problems.
[0008]
(1) Although the strength of the rear housing has increased by providing a step on the flat surface, from the viewpoint of thinning and weight reduction, the strength will continue to decrease in the future. Further increase in strength is required.
[0009]
(2) Although the strength of the entire rear housing is ensured, the central convex portion between the stepped portions is wide, and when the central portion of the rear housing is pressed by an external force, the rear housing is bent inward. Occurs. As a result, the control circuit board and the like arranged at the center are pressurized, and these apply a load to the liquid crystal display device. Control circuit boards such as inverters are equipped with components such as transformers and coils that are damaged by pressure. For this reason, along with the destruction of these components, friction between the components in the liquid crystal display device Cause damage to those parts.
[0010]
The present invention provides a display device structure that is strong against external force and that can protect a control circuit board such as an inverter disposed between a liquid crystal display device and a back housing and components in the liquid crystal display device. With the goal.
[0011]
[Means for Solving the Problems]
In order to solve this problem, in the display device structure of the present invention, a step portion and a groove portion parallel to one side of the substantially rectangular shape are symmetrically formed on the flat portion of the substantially rectangular rear housing by the rising portions. provided at positions, a control circuit board for controlling the display device to the inside of the space of the rear housing formed between the stepped portion and the groove is disposed, and the back spacing of the stepped portion and the groove It is formed to be 1/5 or less of the width of the housing .
[0012]
Thereby, the intensity | strength of the back housing | casing between a level | step-difference part and a groove part can be improved, and the components weak to the pressurization mounted on control circuit boards, such as an inverter, can be protected.
[0013]
DETAILED DESCRIPTION OF THE INVENTION
The present invention includes a display device having a display surface on the front surface, and a rear housing in which the display device is accommodated, and the rear housing has a substantially rectangular planar portion, A step portion formed by a rising portion parallel to at least one side of the substantially rectangular shape and a groove portion formed by the rising portion are provided at symmetrical positions, respectively, in a space inside the rear housing formed between the step portion and the groove portion. A control circuit board for controlling the display device is arranged.
[0014]
In particular, the present invention is characterized in that the stepped portion and the groove portion are provided at symmetrical positions on the rear casing, and stress such as torsion hardly occurs in the rear casing.
[0015]
Further, the present invention is characterized in that the height of the stepped portion and the groove portion provided in the flat portion of the rear casing is 1/20 or more of the interval between the stepped portion and the groove portion. Can be increased.
[0016]
Further, the present invention is characterized in that the slope of the stepped portion and the rising portion of the groove portion provided in the flat portion of the rear case is 45 to 90 ° with respect to the flat portion plane. Both strength and formability can be achieved.
[0017]
Further, the present invention is characterized in that the control circuit board is arranged in a space in the back casing formed by the step portion and the groove, and the back casing of this portion is less bent and protects the control circuit board from the load. be able to.
[0018]
Further, the present invention is characterized in that the control circuit board is a board on which electronic components that generate heat are mounted . Since the control circuit board is disposed between the step part and the groove part, the influence of heat on the display device is reduced. In addition, since the stepped portion and the rising portion of the groove portion are close to each other, heat radiation to the outside can be increased.
[0019]
The present invention is characterized in that the control circuit board is an inverter board, and can protect the inverter board on which components vulnerable to pressurization are mounted.
[0020]
Further, the present invention is characterized in that the rear housing is a metal molded product, and heat radiation from the control circuit board can be further increased.
[0021]
Furthermore, the present invention is characterized in that the rear housing is made of a magnesium alloy, and can be reduced in weight and strength.
[0022]
Hereinafter, embodiments of the present invention will be described with reference to FIGS. 1 to 3.
[0023]
(Embodiment 1)
FIG. 1 is a perspective view showing an appearance of a display device structure according to an embodiment of the present invention, FIG. 2 is a sectional view, and FIG. 3 is a perspective view showing an exploded state. In the figure, 1 is a liquid crystal display device, 2 is a display surface side housing of the liquid crystal display device 1, and the liquid crystal display surface portion is an opening. 3 is a rear housing for protecting the liquid crystal display device 1 and the like from an external force on the back surface of the liquid crystal display device 1, and 4 is a current to an FL tube (not shown) for the backlight of the liquid crystal display device 1. It is a control circuit board such as an inverter to be supplied .
[0024]
The rear housing 3 is made of a magnesium alloy molded product in terms of weight reduction and strength, and has a substantially rectangular shape. A stepped portion 3b parallel to the side surface of the housing 3 is formed on the flat surface portion 3a. The groove portions 3c are provided at symmetrical positions by the rising portions 3e inside the step portions 3b . The distance between the stepped portion 3b and the groove portion 3c takes into account the size of the components housed therein, but it should be 1/5 or less of the width of the rear housing 3, and the stepped portion should be at least 1/20 of the above-mentioned distance. Desirable in strength. In addition, the inclination of the rising portions 3d and 3e of the step portion 3b and the groove portion 3c is preferably 45 to 90 ° with respect to the plane of the plane portion 3a in terms of formability and strength. The optimum numerical value is determined based on the overall size, thickness, weight, strength, and the like for which the display device structure is required.
[0025]
The control circuit board 4 such as an inverter is disposed and accommodated in a space formed inside the rear housing 3 by the stepped portion 3b and the rising portions 3d and 3e of the groove 3c.
[0026]
The structure of the display device configured as described above will be described.
[0027]
Since the rear housing 3 is provided with a groove 3c in addition to the step 3b, the surface strength is greatly increased compared to the conventional case. In particular, the gap between the step 3b and the groove 3c is as narrow as 1/5 or less of the width of the rear housing, so that the space between them is particularly strong. Even if an external force is applied to this part, there is almost no deflection. For this reason, by arranging a control circuit board 4 such as an inverter mounted with weak parts to pressurization in this part, the control circuit board 4 etc. is pressed and deformed, and a load is applied to the liquid crystal display device 1. It is not added, and there is no possibility that the parts mounted on the control circuit board 4 are vulnerable to pressurization or the parts in the display device 1 are broken or damaged.
[0028]
The components mounted on the control circuit board 4 such as an inverter generate heat, but are housed in a space formed by the step portion 3b and the rising portions 3d and 3e of the groove portion 3c, so that the liquid crystal display device 1 Since the rising portions 3d and 3e are close to the control circuit board 4, the heat radiation to the outside can be increased.
[0029]
Further, since the step portion 3b and the groove portion 3c are provided at symmetrical positions of the rear housing 3, stress such as torsion hardly occurs in the rear housing 3.
[0030]
【The invention's effect】
As described above, according to the present invention, when aiming for further reduction in thickness and weight, the stepped portion and the groove portion are provided at symmetrical positions of the rear case, respectively, with respect to the strength of the rear case, which is a problem. Therefore, the strength of the rear housing is made stronger, and the space between the stepped portion and the groove is formed to be 1/5 or less of the width of the rear housing. By placing the control circuit board that is vulnerable to pressure and the components in the display device in the inner space of the rear housing formed by the stepped portion and the groove portion, even if an external force is applied between the stepped portion and the groove portion, In addition to strengthening the strength of the rear housing, which can prevent and protect a certain control circuit board or component from applying a load, it can destroy components that are vulnerable to pressure mounted on the control circuit substrate or components inside the device. Protect from scratches The beneficial effect can be obtained.
In addition, since the stepped portion and the groove portion are respectively provided at symmetrical positions on the rear housing, there is an effect that stress such as torsion is hardly generated in the rear housing.
[Brief description of the drawings]
FIG. 1 is a perspective view showing an appearance of a display device structure according to an embodiment of the present invention. FIG. 2 is a cross-sectional view of a display device structure according to an embodiment of the present invention. FIG. 4 is a perspective view showing an appearance of a conventional display device structure. FIG. 5 is a cross-sectional view showing a conventional display device structure.
DESCRIPTION OF SYMBOLS 1 Liquid crystal display device 2 Display surface side housing | casing 3 Back surface housing | casing 3a Plane part 3b Step part 3c Groove part 3d, 3e Rising part 4 Control circuit board

Claims (1)

A display device having a display surface on a front surface; and a rear housing in which the display device is housed. The rear housing has a substantially rectangular planar portion, and the planar portion includes the substantially rectangular shape. A stepped portion formed by a rising portion parallel to one side of the groove and a groove portion formed by the rising portion are provided at symmetrical positions, respectively , and the display device is disposed in a space inside the rear housing formed between the stepped portion and the groove portion. A display device structure , wherein a control circuit board to be controlled is disposed , and an interval between the stepped portion and the groove portion is formed to be 1/5 or less of the width of the rear casing .

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