JP2003151338A - Lighting device and display device provided therewith - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a lighting device less in stress due to the tension or bending of a lead wire connected to a fluorescent lamp and preventive of core breakage, and a display device therewith. SOLUTION: The lighting device comprises the fluorescent lamp connected with the lead wire and covered with a cover and a storage frame for storing the fluorescent lamp, wherein a protruded portion protruded from the cover is provided near the lead wire and a recessed portion is provided on the storage frame for engaging the protruded portion.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a backlight structure of a display device.

[0002]

2. Description of the Related Art In recent years, liquid crystal display devices have been attracting attention for their features of low power consumption, light weight and thin shape, and their application fields are expanding. For example, in a consumer video monitor, an industrial equipment monitor, or a display panel of an information portable terminal, a product whose display portion is a liquid crystal display device is often used.

FIG. 11 is a plan sectional view showing a part of an illuminating device in such a conventional display device. Connection between a fluorescent lamp, which is a tubular light source used for illuminating the display part, and a lead wire. The example of the structure of a part is shown. As shown in the figure, here, the core wire 4 exposed from the tip of the lead wire 3 is crossed with the electrode 2 extending from one end of the fluorescent lamp 1 which is a tubular light source, and these are connected by solder 5. Then, all of them are covered with a cover 6 made of silicone rubber resin, and finally the storage frame 7
It has a structure to fit in. As a result, the fluorescent lamp 1
Is fixed to the storage frame 7.

However, since the cover 6 is soft, the lead wire 3 may be pulled or repeatedly bent during the manufacturing process or the like, and excessive stress may be applied to the lead wire 3, resulting in disconnection of the core wire 4. . Therefore, in order to prevent this, the tip of the lead wire 3 is covered and protected for a predetermined length, or the lead wire 3 is fixed with a tape or the like so that stress is not directly applied to the connecting portion between the electrode 2 and the core wire 4. It has been taken measures.

[0005]

However, the measures described above are still insufficient, and the core wire 4 may be broken due to the excessive stress. The reason for this is that since a certain degree of clearance is provided in each part at the design stage, stress due to pulling or bending of the lead wire 3 is directly applied to the core wire 4. As a result, the core wire 4 is broken, and the fluorescent lamp 1 is not energized.

Further, conventionally, since the structure in which the fluorescent lamp 1 covered with the cover 6 is housed in the storage frame 7 as it is, the mounting position of the fluorescent lamp 1 is standardized in the assembly in the manufacturing process. In addition, there is a concern that display quality may vary in the display unit. In view of such problems, the present invention provides a lighting device and a display device including the lighting device, which reduces stress caused by pulling or bending of a lead wire connected to a fluorescent lamp and prevents disconnection of a core wire. To aim.

[0007]

In order to achieve the above object, in the present invention, an illumination provided with a fluorescent lamp to which a lead wire is connected and covered with a cover, and a storage frame for storing the fluorescent lamp. The device is characterized in that a convex portion protruding from the cover is provided in the vicinity of the lead wire, and a concave portion engaging with the convex portion is provided in the storage frame.

Further, in a lighting device provided with a fluorescent lamp to which a lead wire is connected and covered with a cover, and a storage frame for storing the fluorescent lamp, a convex portion protruding from the cover near the lead wire. And a hole that engages with the protrusion is provided in the storage frame.

In addition, in a lighting device having a fluorescent lamp which is connected to a lead wire and which is covered with a covering body, and a reflecting plate which is provided around the covering body, and which has a storage frame for storing the fluorescent lamp. In the vicinity of the lead wire, a protrusion protruding from the cover is provided, and a hole engaging with the protrusion is provided in the reflection plate. Further, the storage frame is provided with a concave portion that engages with the convex portion that penetrates the hole of the reflection plate. Alternatively, the storage frame is provided with a hole portion that engages with the convex portion that penetrates the hole portion of the reflection plate.

Further, in a lighting device having a fluorescent lamp to which a lead wire is connected and covered with a cover and a storage frame for storing the fluorescent lamp, and a lamp cover provided outside the storage frame. A protrusion protruding from the cover is provided in the vicinity of the lead wire, and a recess that engages with the protrusion is provided in the storage frame.

Further, in a lighting device having a fluorescent lamp to which a lead wire is connected and covered with a cover, and a storage frame for storing the fluorescent lamp, and a lamp cover provided outside the storage frame. A protrusion protruding from the cover is provided in the vicinity of the lead wire, and a hole engaging with the protrusion is provided in the storage frame. Furthermore, the lamp cover is provided with a hole portion that engages with the convex portion that penetrates the hole portion of the storage frame.

Further, in a lighting device including a fluorescent lamp to which a lead wire is connected and covered with a cover, and a storage frame for storing the fluorescent lamp, a protrusion is provided on the inner wall of the cover in the vicinity of the lead wire. A core wire extending from the lead wire is fixed to the protrusion.

A display device having the above-mentioned lighting device is provided.

[0014]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings. In each of the embodiments described below, the basic structure of the connecting portion between the fluorescent lamp and the lead wire is the same as that shown in the above conventional technique. Further, in the drawings shown below, for convenience of explanation,
The same parts as those in the conventional example are designated by the same reference numerals. Further, in each drawing, diagonal lines are omitted for the cross section other than the covering body.

FIG. 1 is a plan sectional view showing a part of a lighting device in a display device according to a first embodiment of the present invention. In this embodiment, as shown in FIG.
In the vicinity of, the convex portion 6a protruding outward from one end of the covering body 6 is provided, and the concave portion 7a is provided correspondingly to the inner wall of the storage frame 7, and the convex portion 6a is inserted into the concave portion 7a. There is. As a result, the cover 6 is stored in the storage frame 7.
Since the lead wire 3 fixed to the fluorescent lamp 1 can be prevented from being pulled in a direction perpendicular to the fluorescent lamp 1 and the stress applied to the connecting portion by the solder 5 can be reduced, the core wire 4 can be prevented from being broken. However, the shape, number, position, etc. of each of the convex portions 6a and the concave portions 7a are not limited to those shown in the figure. This also applies to the figures shown below.

FIG. 2 is a plan sectional view comparing the conventional example with the present embodiment. The figure (a) shows the prior art example, and the figure (b) has shown this embodiment. As shown in FIG. 1A, in the conventional example, when the lead wire 3 is pulled in the direction indicated by the arrow A (the direction perpendicular to the fluorescent lamp 1), the cover 6 is deformed. When this happens, solder 5
As a result, stress is applied to the connection portion, and the core wire 4 may be broken.

On the other hand, as shown in FIG.
In the present embodiment, even if the lead wire 3 is pulled in the direction indicated by the arrow B, the pulling force is applied to the concave portion 7a of the convex portion 6a.
Since it is received by the insertion part into the cover, the cover 6 is less likely to be deformed. Therefore, the stress applied to the connection portion by the solder 5 is reduced, and the breakage of the core wire 4 is prevented. The effects as described above are similarly exhibited in the following embodiments.

FIG. 3 is a plan sectional view showing a part of the illumination device in the display device according to the second embodiment of the present invention. In this embodiment, as shown in FIG.
Is provided in the vicinity of the cover 6 with a protrusion 6a projecting outward from one end of the cover 6, and the hole 7 is formed in the storage frame 7 correspondingly.
b is provided, and the convex portion 6a penetrates the hole portion 7b. As a result, the cover 6 is fixed to the storage frame 7, and the lead wire 3 in the direction perpendicular to the fluorescent lamp 1 is provided.
It is possible to prevent the core wire 4 from being broken, because the stress applied to the connection portion by the solder 5 can be reduced by controlling the pulling of the core wire 4. Furthermore, the penetrating portion of the convex portion 6a into the hole portion 7b is
Since the positioning is performed when the fluorescent lamp 1 is attached to the storage frame 7, the assembly work of the display device can be standardized, and the display quality can be stabilized.

FIG. 4 is a plan sectional view showing a part of the illumination device in the display device according to the third embodiment of the present invention. In this embodiment, as shown in FIG.
In the vicinity of the cover 6, a convex portion 6a protruding outward from one end of the cover 6 is provided, and correspondingly, the reflection plate 8 around the cover 6 is provided.
A hole 8a is provided in the hole 8a, and the protrusion 6a penetrates the hole 8a. As a result, the cover 6 is fixed to the reflection plate 8, the pulling of the lead wire 3 in the direction perpendicular to the fluorescent lamp 1 is regulated, and the stress applied to the connection portion by the solder 5 can be reduced. It is possible to prevent disconnection.

FIG. 5 is a diagram showing a modification of the third embodiment. In the modified example shown in FIG. 7A, a convex portion 6a protruding outward from one end of the cover 6 is provided, and a hole 8a is provided in the reflection plate 8 around the cover 6 correspondingly, and further, A recess 7a is provided on the inner wall of the storage frame 7 so that the projection 6a
Is penetrated into the hole 8a and further inserted into the recess 7a. As a result, the cover 6 is fixed to the reflector 8 and the storage frame 7, the pulling of the lead wire 3 in the direction perpendicular to the fluorescent lamp 1 is restricted, and the stress applied to the connection portion by the solder 5 can be reduced. It is possible to prevent disconnection of the core wire 4.

In the modified example shown in FIG. 2B, a convex portion 6a protruding outward from one end of the cover 6 is provided, and a hole 8a is provided in the reflection plate 8 around the cover 6 correspondingly. At the same time, the storage frame 7 is further provided with a hole 7b so that the projection 6a
Through the hole 8a and further through the hole 7b. As a result, the cover 6 is fixed to the reflector 8 and the storage frame 7, the pulling of the lead wire 3 in the direction perpendicular to the fluorescent lamp 1 is restricted, and the stress applied to the connection portion by the solder 5 can be reduced. It is possible to prevent disconnection of the core wire 4. Furthermore, the hole 7 of the protrusion 6a
Since the penetrating portion to b serves as the positioning when the fluorescent lamp 1 is attached to the storage frame 7, it is possible to standardize the assembly work of the display device and stabilize the display quality. .

FIG. 6 is a plan sectional view showing a part of an illuminating device in a display device according to a fourth embodiment of the present invention. In this embodiment, as shown in FIG.
Is provided in the vicinity of the cover 6 with a protrusion 6a projecting outward from one end of the cover 6, and the hole 7 is formed in the storage frame 7 correspondingly.
In addition to providing b, the surrounding lamp cover 9 is further provided with a hole 9a so that the projection 6a penetrates the hole 7b and further penetrates the hole 9a.

As a result, the cover 6 is fixed to the storage frame 7 and the lamp cover 9, and the pulling of the lead wire 3 in the direction perpendicular to the fluorescent lamp 1 is regulated.
Since the stress applied to the connection portion due to the above can be reduced, it is possible to prevent the core wire 4 from being broken. Further, the penetrating portion of the convex portion 6a into the hole portion 7b is formed by the storage frame 7
Since the positioning is performed at the time of attachment to the display device, this also has the effect of standardizing the assembly work of the display device and stabilizing the display quality.

FIG. 7 is a diagram showing a modification of the fourth embodiment. In the modified example shown in FIG. 7A, a convex portion 6a protruding outward from one end of the covering body 6 is provided, and a concave portion 7a is provided correspondingly to the inner wall of the storage frame 7 so that the convex portion 6a is a concave portion. 7a. As a result, the cover 6 is fixed to the storage frame 7, the pulling of the lead wire 3 in the direction perpendicular to the fluorescent lamp 1 is restricted, and the stress applied to the connection portion by the solder 5 can be reduced.
It is possible to prevent disconnection of the core wire 4.

In the modified example shown in FIG. 2B, a convex portion 6a protruding outward from one end of the cover 6 is provided, and a corresponding hole 7b is provided in the storage frame 7 so that the convex portion 6a is formed. Is made to penetrate the hole 7b. As a result, the cover 6 is fixed to the storage frame 7, the pulling of the lead wire 3 in the direction perpendicular to the fluorescent lamp 1 is restricted, and the stress applied to the connecting portion by the solder 5 can be reduced, so that the core wire 4 is prevented. It is possible to prevent disconnection. Furthermore, the convex portion 6a
Since the penetrating portion into the hole portion 7b serves as positioning when the fluorescent lamp 1 is attached to the storage frame 7, it is possible to standardize the assembly work of the display device and stabilize the display quality. Also effective.

FIG. 8 is a plan sectional view showing a part of the illumination device in the display device according to the fifth embodiment of the present invention. In this embodiment, as shown in FIG.
A protrusion 6b is provided on the inner wall of the cover 6 near the tip, and the core wire 4 is fixed to this. As a result, the movement of the lead wire 3 in the direction parallel to the fluorescent lamp 1 is regulated, and the stress applied to the connection portion by the solder 5 with respect to the bending of the core wire 4 can be reduced, so that the core wire 4 is prevented from being broken. You can However, the shape, number, position, etc. of the protrusions 6b are not limited to those shown in FIG.

FIG. 9 is a plan sectional view for comparing the conventional example with the present embodiment. The figure (a) shows the prior art example, and the figure (b) has shown this embodiment. As shown in FIG. 1A, in the conventional example, when the lead wire 3 is bent in the direction indicated by arrow C (the direction parallel to the fluorescent lamp 1),
The cover 6 is deformed. In this case, stress is applied to the connection part by the solder 5, and the core wire 4 may be broken.

On the other hand, as shown in FIG.
In the present embodiment, even if the lead wire 3 is bent in the direction indicated by the arrow C, the bending force is received by the protrusion 6b, so that the cover 6 is less likely to be deformed. Therefore, the stress applied to the connection portion by the solder 5 is reduced, and the breakage of the core wire 4 is prevented.

FIG. 10 is a plan sectional view showing a state of a core wire breaking experiment in the second embodiment as an example showing the effect of the present invention. As shown in the figure, here, a load is applied to the lead wire 3 in the bending direction indicated by the arrow, and one reciprocation is performed once until the core wire 4 is broken. Then, the evaluation was performed in comparison with the case of the conventional example shown in FIG. The experimental results are shown below.

[0030]

As can be seen from the above results, by adopting the shape of the cover of the present embodiment, the frequency of core wire breakage is 1/2 or less, stress due to pulling or bending of the lead wire is reduced, and the core wire is disconnected. It is possible to provide a lighting device having a prevention effect and a display device including the lighting device.
In addition, similar effects can be obtained in other embodiments.

[0032]

As described above, according to the present invention,
It is possible to provide a lighting device in which stress caused by pulling or bending of a lead wire connected to a fluorescent lamp is reduced and a core wire is prevented from being broken, and a display device including the lighting device. Furthermore, it is possible to provide a display device in which the assembly work is standardized and the display quality is stabilized.

[Brief description of drawings]

FIG. 1 is a plan sectional view showing a part of a lighting device in a display device according to a first embodiment of the present invention.

FIG. 2 is a plan cross-sectional view comparing a conventional example with the first embodiment.

FIG. 3 is a plan sectional view showing a part of an illumination device in a display device according to a second embodiment of the present invention.

FIG. 4 is a plan sectional view showing a part of an illumination device in a display device according to a third embodiment of the present invention.

FIG. 5 is a diagram showing a modification of the third embodiment.

FIG. 6 is a plan sectional view showing a part of an illumination device in a display device according to a fourth embodiment of the present invention.

FIG. 7 is a diagram showing a modification of the fourth embodiment.

FIG. 8 is a plan sectional view showing a part of an illumination device in a display device according to a fifth embodiment of the present invention.

FIG. 9 is a plan cross-sectional view comparing a conventional example and the fifth embodiment.

FIG. 10 is a plan sectional view showing a state of a core wire breaking experiment in the second embodiment.

FIG. 11 is a plan sectional view showing a part of a lighting device in a conventional display device.

[Explanation of symbols]

1 fluorescent lamp 2 electrodes 3 lead wire 4 core wire 5 solder 6 Cover 7 Storage frame 8 reflector 9 lamp cover

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Claims (10)

[Claims] 1. A lighting device comprising a fluorescent lamp to which a lead wire is connected and covered with a cover, and a storage frame for storing the fluorescent lamp, wherein a convex portion protruding from the cover near the lead wire. And a recess that engages with the protrusion is provided in the storage frame. 2. A lighting device comprising a fluorescent lamp connected to a lead wire and covered with a cover, and a storage frame for storing the fluorescent lamp, wherein a convex portion protruding from the cover near the lead wire. And a hole that engages with the protrusion is provided in the storage frame. 3. A lighting device comprising: a fluorescent lamp having lead wires connected thereto and covered with a covering; and a reflector provided around the covering, and comprising a storage frame for storing the fluorescent lamp. An illuminating device characterized in that a convex portion protruding from the covering is provided in the vicinity of the lead wire, and a hole portion engaging with the convex portion is provided in the reflection plate. 4. The lighting device according to claim 3, wherein a recess that engages with the protrusion that penetrates the hole of the reflection plate is provided in the storage frame. 5. The lighting device according to claim 3, wherein a hole portion that penetrates the hole portion of the reflection plate and that engages with the convex portion is provided in the storage frame. 6. A lighting device comprising: a fluorescent lamp to which a lead wire is connected; the fluorescent lamp being covered with a cover; and a storage frame for storing the fluorescent lamp, and a lamp cover provided outside the storage frame. An illuminating device characterized in that a convex portion protruding from the covering is provided in the vicinity of the lead wire, and a concave portion engaging with the convex portion is provided in the storage frame. 7. A lighting device comprising: a fluorescent lamp to which a lead wire is connected and covered with a cover; and a storage frame for storing the fluorescent lamp, and a lamp cover provided outside the storage frame. An illumination device, characterized in that a convex portion protruding from the cover is provided in the vicinity of the lead wire, and a hole portion that engages with the convex portion is provided in the storage frame. 8. The lighting device according to claim 7, wherein the lamp cover is provided with a hole that engages with the protrusion that penetrates the hole of the storage frame. 9. A lighting device comprising a fluorescent lamp to which a lead wire is connected and covered with a cover, and a storage frame for storing the fluorescent lamp, wherein a protrusion is provided on the inner wall of the cover in the vicinity of the lead wire. An illuminating device, characterized in that a core wire extending from the lead wire is fixed to the protrusion. 10. A display device comprising the lighting device according to claim 1.