JP2003098510A - Attaching structure for liquid crystal display panel - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an attaching structure for a liquid crystal display panel which can be adapted to liquid crystal units having structure specifications different from each other and prevent EMI without necessitating additional components. SOLUTION: The attaching structure for the liquid crystal display panel has a fundamental frame 1 to be a common metal casing frame for respectively attaching a plurality of liquid crystal units having structure specifications different from each other. The fundamental frame 1 has both first and second bent shape parts 2 and 3 both formed by cutting and raising at least one circumferential surface of the frame and respectively coming in elastic contact with the circumferential surface of a first prescribed liquid crystal unit k1 when the liquid crystal unit k1 of a plurality of liquid crystal units is attached to the frame and coming in elastic contact with the rear surface adjacent to the circumferential surface of a second prescribed liquid crystal unit k3 when the liquid crystal unit k3 of a plurality of liquid crystal units is attached to the frame.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a mounting structure of a liquid crystal display panel, and more particularly, even when the liquid crystal display panel (hereinafter referred to as a liquid crystal unit) has different structural specifications such as an outer size, a mounting position, and a screen position. The present invention relates to a grounding structure for a liquid crystal unit mounting housing frame, in which the liquid crystal unit and the liquid crystal unit mounting housing frame are electrically contacted and grounded to remove (electromagnetic interference).

[0002]

2. Description of the Related Art In a liquid crystal monitor device, liquid crystal units, which have a display function, have liquid crystal units manufactured by a plurality of companies in the same liquid crystal monitor device because of the demand quantity of the liquid crystal monitor device and the supplyable quantity of each company manufacturing the liquid crystal unit. The unit is used more often.

In such a case, even if the display area size of the liquid crystal unit is the same, the structural specifications such as the outer size, the mounting position, and the screen position are different from each other. One type of housing frame is used that absorbs the difference in the structural specifications of each liquid crystal unit and that corresponds to the difference in the mounting position of each liquid crystal unit. In the following description, such a frame ground of the casing frame will be referred to as a basic frame.

As described above, the reason why one type of basic frame is used as a housing common to a plurality of types of liquid crystal units is that the basic frame is developed for each liquid crystal unit and compared with the structure in which each housing is used as a housing. This is because it is possible to reduce body manufacturing development costs.

A conventional example of such a liquid crystal display panel mounting structure is described in Japanese Patent Laid-Open No. 2001-83486. This liquid crystal display panel mounting structure uses a mounting tool corresponding to the size or shape of the liquid crystal display panel, and mounts the panel at an arbitrary position in the housing of the portable information processing device. It is a structure.

The liquid crystal display panel mounting structure includes first and second mounting members, and each mounting member has a mounting member body and a first mounting portion. Of these, the attachment main body is provided with a second attachment portion at a position that matches the casing-side attachment portion of the display casing. Then, a hole is formed in the second mounting portion at a position where it is joined to a screw hole formed in the housing side mounting portion. Further, the first mounting portion has a hole formed at a position where it is joined to the panel-side mounting portion of the liquid crystal display panel.
As described above, the liquid crystal display panel can be attached to the display housing by using the attachments that can be attached to the respective mounting portions of the display housing and the liquid crystal display panel.

As described above, although liquid crystal display panels having different shapes can be adapted to the same type of display unit housing, the liquid crystal monitor device further needs a measure for eliminating EMI. Therefore, it is essential to reduce the radiation noise by bringing the liquid crystal unit and the basic frame, which is the frame ground of the liquid crystal monitor, into contact with each other to eliminate the potential difference between the liquid crystal unit and the basic frame.

Conventionally, when a plurality of liquid crystal units of different sizes are mounted on the same type of basic frame, a conductive component covered with a sponge material with a conductive cloth or a metal spring is mounted between the basic frame and the liquid crystal unit. By inserting the parts, the basic frame and the liquid crystal unit were electrically connected and grounded.

FIG. 5 is a view showing an example of a conventional grounding method for a liquid crystal unit and a basic frame, (A) is a top view,
(B) is a KK sectional view of FIG. LCD unit 5
In order to ensure the electrical connection between 1 and the basic frame 52, a conductive component 53 in which a sponge material is coated with a conductive cloth is attached to the basic frame 52. Since the conducting part 53 is an elastic body and is deformable, the conducting part 53 absorbs structural specification differences such as outer sizes of liquid crystal units manufactured by different manufacturers.
In addition, the basic frame 52 and each liquid crystal unit 51 can be grounded.

[0010]

The grounding using such a conducting part 53 has a problem that a lot of costs such as a conducting part cost and a component pasting cost are generated. An object of the present invention is a liquid crystal that can be adapted to liquid crystal units having different structural specifications such as outer size, and can prevent EMI without requiring additional parts such as the above-mentioned conducting parts. It is to provide a mounting structure for a display panel.

[0011]

In order to achieve the above object, a liquid crystal display panel mounting structure according to the present invention includes a plurality of liquid crystal units having different structural specifications, and a common metal casing for mounting the liquid crystal units. A grounding structure for a liquid crystal unit mounting housing frame that grounds by electrically contacting the liquid crystal unit and the base frame when mounted on the body frame, which is a basic frame. Is also formed by cutting and raising one peripheral surface, and when the liquid crystal unit is attached, it has a bent portion that elastically contacts the peripheral surface of the liquid crystal unit or the back surface adjacent to the peripheral surface of the liquid crystal unit. In this way, when liquid crystal units of different sizes are attached to a common basic frame, the basic frame can be grounded only by the members of the basic frame.

The bent shape portion should be formed as a first bent shape portion that elastically contacts the peripheral surface of the liquid crystal unit when a first predetermined liquid crystal unit of the plurality of liquid crystal units is attached. You can The bent shape portion also serves as a second bent shape portion that elastically contacts the back surface adjacent to the peripheral surface of the liquid crystal unit when the second predetermined liquid crystal unit of the plurality of liquid crystal units is attached. Can be formed.

As a preferred embodiment of the basic frame,
The basic frame includes a first bent shape portion that elastically contacts the peripheral surface of the liquid crystal unit when a first predetermined liquid crystal unit of the plurality of liquid crystal units is attached, and the first frame of the plurality of liquid crystal units. When the second predetermined liquid crystal unit is attached, the second predetermined liquid crystal unit has a second bent portion that elastically contacts the back surface adjacent to the peripheral surface of the liquid crystal unit.

Even when the basic frame is provided with both the first and second bent portions, only one of them is sufficient as an EMI countermeasure. Therefore, EMI
Bending shape parts other than the bending shape part used as a countermeasure are
It is formed so as not to contact the liquid crystal unit. The reason for this is to prevent the bent shape portion, which is not used for EMI measures, from unnecessarily interfering with the mounting of the liquid crystal unit.

In other words, when the first predetermined liquid crystal unit is attached to the basic frame, the second bent shape portion does not come into contact with the liquid crystal unit and the space for properly mounting the liquid crystal unit. When the second predetermined liquid crystal unit is attached to the basic frame, the first bent shape portion does not contact the liquid crystal unit,
Generates a spatial allowance for proper mounting of the liquid crystal unit.

The second bent shape portion has a stepped shape,
When the second predetermined liquid crystal unit is attached,
Depending on the thickness of the liquid crystal unit, one of the step surfaces may be formed so as to contact the back surface adjacent to the peripheral surface of the liquid crystal unit.

[0017]

The present invention is elastically contacted with the peripheral surface or the back surface of a predetermined liquid crystal unit among a plurality of liquid crystal units having different structural specifications such as the outer size, the mounting position, and the screen position in the EMI countermeasure of the liquid crystal monitor device. By cutting and raising the first bent shape portion and the second bent shape portion from the basic frame, the liquid crystal unit and the basic frame can be mounted on the liquid crystal unit without using a conductive component and a mounting failure of the liquid crystal unit. It is possible to make electrical contact only with the basic frame member without any occurrence.

[0018]

1 is a view showing a basic frame of the present invention, FIG. 1 (A) is a front view of the basic frame 1, FIG. 1 (B) is a sectional view taken along the line AA of a bent portion 2, and FIG. 8D is a front view of the step-bent shape portion 3, and FIG. 9D is a BB sectional view of the step-bent shape portion 3. In the following description, "upper and lower" of the basic frame and the liquid crystal unit means up or down with respect to the front view shown.

In FIG. 1A, the basic frame 1 is made of metal, and at least an upper peripheral portion of the basic frame 1 is folded up to form a peripheral surface of the basic frame 1. Basic frame 1
Has an outer flat portion 10 near the peripheral portion and an inner flat portion 11 in the central portion, and the inner flat portion 11 is formed as a recess by press working. In the outer flat portion 10,
A large number of pores 4 for radiating heat are opened.

The upper portion of the basic frame 1 is provided with four elastic bending shapes 2 and four step bending shapes 3 which are cut and raised from the peripheral surface of the basic frame. Each step-bending shape portion 3 is configured to include step surfaces 3e and 3f. The AA cross section of the bent shape part 2 and the BB cross section of the step bend shape part 3 having these elasticity are respectively formed as shown in FIGS.

As shown in FIG. 1B, the bent portion 2 is formed so as to elastically contact the upper side surface of the liquid crystal unit. Therefore, the bent portion 2 serves to absorb the difference in the dimensional specifications of the liquid crystal unit in the vertical direction and to ensure the electrical conduction between the basic frame and the liquid crystal unit.

As shown in the front view of FIG. (C) and the sectional view of FIG. (D), the step-bending shape portion 3 has two step surfaces 3e and 3f and both step surfaces. It is provided with a transition surface which connects the step surfaces 3e and 3f vertically or inclined. As can be seen from FIG. 6D, the step-bent shape portion 3 is formed so as to elastically contact the upper back surface of the liquid crystal unit.
Therefore, the bent shape portion 3 serves to absorb the difference in the dimensional specifications of the liquid crystal unit in the thickness direction and to ensure the electrical conduction between the basic frame and the liquid crystal unit.

As described above, the basic frame 1 is mechanically and mechanically connected to liquid crystal units having different structural specifications as an EMI countermeasure.
It is possible to make electrical contact to absorb the difference in structural specifications between each liquid crystal unit and the basic frame, and eliminate the potential difference between the liquid crystal unit and the basic frame.

Next, a method of contacting the three types of liquid crystal units k1, k2, k3 having different dimensional specifications with the basic frame of FIG. 1 will be described with reference to the drawings. In the embodiments described below, the vertical size of the liquid crystal unit is the largest k1, the smallest k3, and the middle k2, and the thickness of the liquid crystal unit is the smallest k1 and the largest k3. , K
2 is an example in the case of being in the middle.

In FIG. 2, the liquid crystal unit k is provided on the basic frame 1.
1A and 1B are mounted, FIG. 1A is a front view, FIG. 1B is a CC sectional view of a bent shape portion 2, and FIG. 1C is a DD sectional view of a stepped shape portion 3. The bent portion 2 having elasticity is in the state shown in FIG. 2B, and the elastic force of the bent portion 2 makes contact with the liquid crystal unit k1 to electrically connect the liquid crystal unit k1 and the basic frame 1. It will be possible.

With respect to the liquid crystal unit k1, the step-bent shape portion 3 is in the state shown in FIG. That is, a gap remains between the step-shaped portion 3 and the back surface of the liquid crystal unit k1. Therefore, it is possible to avoid a situation in which mounting failure in the thickness direction of the liquid crystal unit k1 occurs due to the interference of the step-bent shape portion 3.

The reason why the gap is formed between the step-shaped portion 3 and the back surface of the liquid crystal unit k1 is that the back surfaces of the liquid crystal units k2 and k3 having a larger thickness than the liquid crystal unit k1 have step-shaped portions. Contact the surfaces 3f and 3e (see FIG. 3).
This is because the step-bending shape portion 3 is formed (see (C) and FIG. 4 (C)).

In the embodiment shown in FIG. 2, the bent shape portion 2 is used to electrically connect the liquid crystal unit k1 and the basic frame 1. The electrical conduction between the liquid crystal unit k1 and the basic frame 1 for removing the EMI is sufficient with the electrical conduction by the bent portion 2. Therefore, it is not necessary to bring the step-bent shape portion 3 into contact with the liquid crystal unit 1. In the present embodiment, as shown in FIG. 6C, the step-bending shape portion 3 which is not necessary for EMI measures does not interfere with the mounting of the liquid crystal unit (the position of the liquid crystal unit is not restricted. ), The elastic properties, shape, and arrangement are intentionally set.

To this end, the difference in the structural specifications of the liquid crystal units intended to be attached to the basic frame 1 is utilized (in the present embodiment, the liquid crystal units k2, k are used).
The respective thicknesses t2 and t3 of 3 are the thickness t1 of the liquid crystal unit k1.
It is possible to mount the liquid crystal unit k1 while avoiding the interference of the step-bent shape portion 3).

Next, FIG. 3 is a view showing a case where the liquid crystal unit k2 is mounted on the basic frame 1, and FIG. 3 (A) is a front view.
FIG. 6B is a sectional view taken along the line EE of the bent shape portion 2, and FIG. In the step-bent shape portion 3, the back surface of the liquid crystal unit k2 rides on the surface 3f of the step-bent shape portion 3, as shown in the cross section FF of FIG. When the liquid crystal unit k2 is attached to the basic frame 1 in such a state, and further, in some cases, due to the own weight of the liquid crystal unit k2, electrical continuity between the liquid crystal unit k2 and the basic frame 1 is achieved, whereby the liquid crystal The unit k2 can be grounded.

At this time, E of the bent shape portion 2 having elasticity
The E cross section is as shown in FIG. At this time, a spatial or elastic clearance is provided between the liquid crystal unit k2 and the bent shape portion 2 (a range in which the liquid crystal unit can be arbitrarily positioned without being restricted by the bent shape portion 2, hereinafter referred to as spatial). Since there is a clearance), a mounting defect due to the interference of the bent shape portion 2 does not occur.

The reason why such a spatial clearance occurs is as follows.
The bent portion 2 having elasticity is formed so as to stably hold the liquid crystal unit k1 at a predetermined position of the basic frame 1, while the gap m2 between the upper side surface of the liquid crystal unit k2 and the basic frame 1 is This is because it is larger than the gap m1 between the upper surface of the liquid crystal unit k1 and the basic frame 1.

FIG. 4 shows a liquid crystal unit k on the basic frame 1.
3A and 3B are mounted, FIG. 7A is a front view, FIG. 7B is a GG sectional view of the bent shape portion 2, and FIG. In this case as well, in the step-bent shape portion 3, the rear surface of the liquid crystal unit k3 is in a state of resting on the surface 3e of the step-bent shape portion 3, as the HH cross section thereof is shown in FIG. When the liquid crystal unit k3 is attached to the basic frame 1 in such a state, and further, in some cases, due to the own weight of the liquid crystal unit k3, electrical continuity between the liquid crystal unit k3 and the basic frame 1 is achieved, whereby the liquid crystal The unit k2 can be grounded.

Also in this case, the bent portion 2 having elasticity
Becomes a state in which its GG cross section is shown in FIG. Also at this time, the liquid crystal unit k3 and the basic frame 1
There is a space between and so there is a basic frame 1
There is no mounting failure due to interference. The reason why such a spatial clearance occurs is that the bent shape portion 2 having elasticity is
The liquid crystal unit k1 is formed so as to be stably held at a predetermined position of the basic frame 1, while the gap m3 between the upper side surface of the liquid crystal unit k3 and the basic frame 1 is the upper side surface of the liquid crystal unit k1 and the basic frame. Gap between 1 and m1
Because it is larger than. Therefore, it is possible to avoid that the bent portion 2 having elasticity interferes with the mounting of the liquid crystal unit k2.

With the above structure, only one type of basic frame 1 is used, and three types of liquid crystal units k1 and k are used.
The grounding of 2, k3 becomes possible, and the EMI countermeasure can be implemented inexpensively and surely.

Since the bent portion 2 has elasticity,
It is also possible to support a liquid crystal unit whose external size is different from that of the liquid crystal unit k1. Also, the bent shape part g can be adapted to other liquid crystal units by forming a step bend having a plurality of step faces.

In the above embodiments, the grounding of the liquid crystal unit and the basic frame is described. However, the grounding of the basic frame is required, and an electric unit (for example, a unit manufactured by a plurality of companies) is often used for the same product (for example, an electric unit). FDD and HD
It can also be applied to a grounding structure (for example, D). In this case, the cross-sectional shapes in FIGS. 1 to 4 can be used as they are, and the liquid crystal unit can be simply replaced with another electric unit.

[0038]

[Explanation of Effects] The present invention has the following effects. 1) Since the basic frame is cut and raised to form a conductive portion with the liquid crystal unit, it is not necessary to attach a special conductive component. As a result, it is possible to reduce the component cost and the component attachment cost. 2) The liquid crystal unit can be grounded only by the cut-and-raised part of the basic frame, and the attachment of the conducting parts can be omitted, so it is possible to prevent deterioration of the EMI characteristics due to missing or dropping of the conducting parts, and EMI quality. It is possible to obtain the stability of. 3) The basic frame has only one shape, and it is not necessary to develop the basic frame for each liquid crystal unit, so that the housing manufacturing and development cost can be reduced.

[Brief description of drawings]

FIG. 1 is a diagram showing a basic frame of the present invention, and FIG.
Is a front view of the basic frame 1, and FIG.
3A is a cross-sectional view taken along the line AA, FIG. 6C is a front view of the step-bent shape portion 3, and FIG.

2A and 2B are views showing a case where a liquid crystal unit k1 is mounted on a basic frame 1, FIG. 2A is a front view, FIG. 2B is a CC cross-sectional view of a bent shape portion 2, and FIG. DD of part 3
FIG.

3A and 3B are diagrams showing a case where a liquid crystal unit k2 is mounted on the basic frame 1, where FIG. 3A is a front view, FIG. 3B is an EE sectional view of the bent shape portion 2, and FIG. FF of part 3
FIG.

4A and 4B are diagrams showing a case where a liquid crystal unit k3 is mounted on the basic frame 1, where FIG. 4A is a front view, FIG. 4B is a GG sectional view of a bent shape portion 2, and FIG. Part 3 HH
FIG.

5A and 5B are views showing an example of a grounding method of a conventional liquid crystal unit and a basic frame, FIG. 5A is a top view, and FIG.
FIG.

[Explanation of symbols]

1 basic frame Bending shape with elasticity 3-step bent shape part 3e step 3f step 4 pores 10 Outside flat part 11 Inner flat part 51 LCD unit 52 Basic frame 53 Parts for continuity

Claims (6)

[Claims] 1. When a plurality of liquid crystal units having different structural specifications are mounted on a basic frame which is a common metal housing frame for mounting the liquid crystal units, the liquid crystal unit and the basic frame are electrically contacted with each other. In the grounding structure of the housing frame for mounting a liquid crystal unit, the basic frame is formed by cutting and raising at least one peripheral surface, and when the liquid crystal unit is mounted, the peripheral surface of the liquid crystal unit is mounted. Alternatively, the liquid crystal display panel mounting structure is characterized by having a bent shape portion that elastically contacts a back surface adjacent to the peripheral surface of the liquid crystal unit. 2. The bent shape portion is a first bent shape portion that elastically contacts the peripheral surface of the liquid crystal unit when a first predetermined liquid crystal unit of the plurality of liquid crystal units is attached. The mounting structure for a liquid crystal display panel according to claim 1, wherein 3. The bent shape portion, when a second predetermined liquid crystal unit of the plurality of liquid crystal units is attached, elastically contacts a back surface adjacent to a peripheral surface of the liquid crystal unit. The mounting structure for a liquid crystal display panel according to claim 1, wherein the mounting structure has a bent shape. 4. The basic frame includes a first bent shape portion elastically contacting a peripheral surface of the liquid crystal unit when a first predetermined liquid crystal unit of the plurality of liquid crystal units is attached. When a second predetermined liquid crystal unit of the plurality of liquid crystal units is attached, the liquid crystal unit has a second bent shape portion elastically contacting a back surface adjacent to the peripheral surface of the liquid crystal unit. Claim 1
Liquid crystal display panel mounting structure described in. 5. The second bent portion has a step shape, and when the second predetermined liquid crystal unit is attached, one of the step surfaces is a liquid crystal unit depending on the thickness of the liquid crystal unit. The mounting structure for a liquid crystal display panel according to claim 4, wherein the mounting structure is in contact with a rear surface adjacent to the peripheral surface of the liquid crystal display panel. 6. When the first predetermined liquid crystal unit is attached to the basic frame, the second bent shape portion does not come into contact with the liquid crystal unit, and there is a spatial allowance for proper mounting of the liquid crystal unit. When the second predetermined liquid crystal unit is attached to the basic frame, the first bent shape portion does not come into contact with the liquid crystal unit and produces a spatial margin for proper mounting of the liquid crystal unit. The mounting structure for a liquid crystal display panel according to claim 4.