JPH0720460A - Lighting equipment - Google Patents

Abstract

(57) [Summary] [Structure] A line light source support 8 having a line light source 7 disposed therein is attached to one end of a light guide plate unit 1 having a light guide plate 2. The linear light source support 8 is composed of a bent portion 8a and flat end portions 8b and 8c extending from both ends of the bent portion 8a. The linear light source support 8 has a long shape with one side open and has a spring property and the bent portion 8a. Is formed in a shape that matches the outer peripheral shape of the insulating covers 10 and 10 provided at the end of the linear light source 7, and the boundary between the curved portion 8a and the flat portion 8c is a line arranged inside the curved portion 8a. In order to fix the light source 7, the light source 7 is formed so as to have a constriction in the entire longitudinal direction, and a constricted portion 8d is formed. [Effects] Workability and safety when the linear light source 7 is inserted into the linear light source support 8 are improved, and damage to the linear light source 7 at the time of insertion is avoided to prevent waste of members. ,
As a result, the manufacturing cost is reduced.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a light source lamp and light emitted from the light source lamp, which can be used as a back light for illuminating a liquid crystal panel used for a display unit such as a laptop personal computer or a word processor from the back side. The present invention relates to an edge light type lighting device including a light guide plate that transmits light.

[0002]

2. Description of the Related Art For example, as shown in FIG. 7, a backlight for illuminating a liquid crystal panel from the back side includes a light guide plate 31 made of acrylic resin or the like that guides light efficiently. A line light source (light source lamp) 32 made of, for example, a cold-cathode tube having a thin tubular shape with a diameter of 3 mmφ is disposed near the portion, and the light guided to the light guide plate 31 is efficiently provided on the back surface of the light guide plate 31. A reflective sheet 33 that reflects light is formed. The backlight is configured to effectively illuminate the liquid crystal panel (not shown) disposed on the upper surface side by making the light guide plate 31 a surface light source by the light from the linear light source 32.

The line light source 32 is attached to the light guide plate 31 through a line light source support (light source support) 35 attached to the end of the light guide 31. As shown in FIG. 8, the conventional linear light source supporter 35 supports the linear light source 32 and covers the linear light source 32 so as to prevent the light of the linear light source 32 from being dispersed in multiple directions. Bending part 35
a and flat portions 35b and 35b which are formed by extending both ends of the bent portion 35a and are substantially parallel to each other.
It is formed in a shape covering the entire length of the linear light source 32, which is open on one side. Between the flat portions 35b and 35b,
An open end corresponding to the thickness of the light guide plate 31 is formed, and the boundary between the bent portion 35a and each flat portion 35b is bent and folded because the light guide plate 31 is thinner than the diameter of the linear light source 32. A curved portion 35c is formed.

The linear light source support 35 is attached to the light guide plate 31 by inserting one end of the light guide plate 31 into the open end and sandwiching the light guide 31 with the flat portions 35b and 35b. In this state, both ends are fastened using screws 34.

[0005]

However, in the above conventional structure, the width of the open end of the line light source support 35 is smaller than the diameter of the line light source 32 due to the shapes of the light guide plate 31 and the line light source 32. The line light source 32 cannot be slid and inserted from this open end, and therefore, the line light source 32 can be mounted inside the line light source support 35 only.
This is done by inserting the linear light source 32 straight in the axial direction from a small opening provided at the longitudinal end of the linear light source 32 into the narrow internal space. Therefore, at the time of insertion, there is a risk that the linear light source 32 may be damaged by coming into contact with the inner wall of the linear light source support 35, workability is poor, work efficiency cannot be improved, and safety during work is low. In addition, there is a problem that the manufacturing cost is increased due to waste of the member due to damage and the like.

When the linear light source 32 is axially inserted into the linear light source support 35 from one end, the linear light source 32 with the lead wire and the insulating cover already attached cannot be inserted. The line light source 32 is attached to the line light source support 35
After inserting the lead wire, the lead wire must be soldered and the insulating cover must be fitted. Therefore, the workability in soldering the lead wire is deteriorated, and the fitted insulating cover may fall off during use, and the line light source 32 may be damaged.

Further, in the above-mentioned conventional structure, since the line light source support 35 and the light guide plate 31 are attached by fastening both ends using the screws 34, when the line light source 32 is replaced, Since it is necessary to remove the light guide plate 31 as a whole, there is a drawback that the workability at the time of exchanging the linear light source is poor.

[0008]

In order to solve the above-mentioned problems, an illumination device according to a first aspect of the present invention has a thin tubular light source lamp near a side end portion of a light guide plate which transmits light. The light source support, which is fixed to the light plate, is attached along the side end of the light guide plate, and the light source support is a bent portion having a substantially arcuate cross section along the side not facing the light guide plate of the light source lamp. And a flat end portion which is formed by extending both ends of the curved portion and is substantially parallel to each other. The unidirectional side is open to cover the entire length of the light source lamp and a boundary between at least one flat portion and the curved portion. In the edge light type illumination device in which the light source is formed in a constricted shape over the entire longitudinal direction, the light source support has a spring property.

Further, in order to solve the above-mentioned problems, an illumination device according to a second aspect of the present invention is the illumination device according to the first aspect, in which the bent portion of the light source support is provided at an end of the light source lamp. It is characterized in that it is formed in a shape that matches the outer peripheral shape of the cover.

Further, in order to solve the above-mentioned problems, an illumination device according to a third aspect of the present invention is the illumination device according to the first or second aspect, wherein an opening is formed in the flat portion of the light source support, while: On the back surface of the light guide plate, there is provided a light guide plate support member that supports a light guide plate having a convex portion formed at a portion facing the opening of the light source support member. The light source support is detachably attached to the light guide plate by being fitted into the opening.

[0011]

According to the structure of claim 1, the light source support is
Since it has elasticity, the light source lamp faces the open end even if the width of the open end formed between the flat portions of the light source support is smaller than the diameter of the linear light source. As shown in the figure, slide the light source lamp horizontally in this state to spread the flat part,
The light source lamp can be inserted into the light source support from the open end. This allows the light source lamp to come into contact with the inner wall of the light source support at the time of insertion, as in the case where the light source lamp is inserted straight into the narrow inner space through the small opening provided at the longitudinal end of the light source support. It is possible to improve work efficiency, enhance safety during work, suppress waste of members due to breakage, and eventually reduce manufacturing cost, without causing a situation such as causing damage and the like.

Further, since the light source lamp is slid and inserted in parallel from the open end along the longitudinal direction, it is necessary to insert the light source lamp with the lead wire already soldered and the insulating cover attached. Is possible,
It is not necessary to solder the lead wire in a state where the lead wire is inserted into the light source support as in the conventional case, and the workability of soldering is improved and the work efficiency is improved, and the manufacturing cost can also be reduced. Further, compared with the conventional insulating cover fitted afterwards, the risk of falling off during use is reduced, and the safety of the device itself can be improved.

In this case, the bent portion of the light source support is formed in a shape that matches the outer peripheral shape of the insulating cover provided at the end of the light source lamp. The insulating cover part of the inserted light source lamp is fixed by the restoring force of the spring of the light source support and the constriction of the constricted part, so the light source lamp can be easily operated by simply supporting and inserting the insulating cover. It can be attached without any fear of contacting the light source support. As a result, it is possible to further improve the work efficiency and further reduce the manufacturing cost.

Further, according to a third aspect of the present invention, an opening is formed in the flat portion of the light source support, while a portion of the back surface of the light guide plate facing the opening of the light source support. By providing a light guide plate support member that supports the light guide plate having a convex portion formed thereon and fitting the convex portion into the opening of the light source support member, the light source support member can be detachably attached to the light guide plate. When replacing the light source lamp, it is possible to replace the light source lamp by removing the light source support without removing the light guide plate as in the conventional case, and workability during lamp replacement is improved. It

[0015]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The following will describe one embodiment of the present invention with reference to FIGS.

In this embodiment, as an illumination device according to the present invention, an edge light type backlight for irradiating a liquid crystal panel constituting a display portion such as a word processor from the back side will be described as an example.

As shown in FIG. 1 or 2, the backlight is a flat plate-shaped planar light source, and is provided with a light guide plate 2 made of an acrylic resin such as PMMA (polymethyl methacrylate) for efficiently transmitting light. It has a light guide plate unit 1.

The light guide plate unit 1, together with the light guide plate 2, diffuses the light provided on the upper surface side of the light guide plate 2, that is, on the side facing the liquid crystal panel (not shown), for example PET.
A diffusion sheet 3 made of (polyethylene terephthalate), a reflection sheet 4 provided on the lower surface side of the light guide plate 2 for efficiently reflecting light, and a reflection sheet provided on the lower surface of the reflection sheet 4 from the lower surface of the light guide plate 2 And a plastic casing (light guide plate support) 5 that surrounds the side end of the. Of these, in the vicinity of an end of the plastic housing 5 on the side where a line light source to be described later is arranged, a plurality of convex portions 5a having a tapered one side are provided along the end.

At one side end of the light guide plate unit 1, a line light source (light source lamp) 7 including a thin tubular cold cathode tube for supplying light to the light guide plate 2 is arranged. 7 is attached to the light guide plate unit 1 via a linear light source support (light source support) 8. Terminal portions (not shown) are formed at both ends of the linear light source 7, and lead wires 9 are soldered to the terminal portions, and cylindrical insulating covers 10 and 10 which are substantially coaxial with the linear light source 7 are attached. Has been.

The linear light source support 8 has a spring property, and as shown in FIG. 3, a curved portion 8a having a substantially arcuate cross section whose curvature corresponds to the outer peripheral shape of the insulating cover 10. The linear light source 7 is formed in a long shape, which is formed of flat portions 8b and 8c which are formed by extending both ends of the curved portion 8a and which are substantially parallel to each other and which is open in one direction and covers the entire length of the linear light source 7. By thus forming the elongated shape and covering the side of the linear light source 7 that is not disposed facing the light guide plate 2 with the bent portion 8a, the light from the linear light source 7 can be directed in multiple directions. Dispersion is blocked and light is efficiently supplied to the light guide plate 2.

At the boundary between the curved portion 8a and the flat portion 8c, a constricted portion 8d is formed which is bent over the entire longitudinal direction. The conventional constricted part is inevitably generated because the diameter of the linear light source is larger than the thickness of the light guide plate, but the constricted part 8d of the present embodiment is provided due to the thickness of the light guide plate 2. Rather than a thing, it is a structure necessary for fixing the insulating cover 10 of the linear light source 7 arranged inside the bent portion 8a.

The curvature of the bent portion 8a is formed to be the same as the outer diameter of the insulating cover 10, and the insulating cover provided on the line light source 7 is provided at both ends of the bent portion 8a in the longitudinal direction. A notch 8f for drawing out the lead wire 9 is formed together with a part of 10.

On the other hand, in the vicinity of the end of the flat portion 8b where the constricted portion 8d is not formed, a plurality of openings 8e ... Are provided in the plastic housing 5 of the light source unit 1 along the end. It is formed so as to correspond to each of the convex portions 5 provided, and the plastic housing 5 is formed in the openings 8e.
By fitting the convex portions 5 ... of the
The linear light source support 8 is attached to the light guide plate unit 1.

Such a linear light source support 8 is formed by injection-molding a resin such as ABS resin (Acrylonitrile Butadiene Styrene Resin) or polycarbonate, or by pressing a metal such as aluminum or a surface-treated steel plate. The thickness of the resin is 0.5 to 0.
8 mm, and in the case of metal, 0.3 to 0.5 mm.

Further, when the specific numerical values are exemplified, the linear light source 7
When the outer diameter is 3 mmφ and the thickness of the circular portion of the insulating cover 10 is 0.5 mm, the radius of the bent portion of the linear light source support 8 is designed to be 2.1 mm.

The operation of mounting the linear light source 7 inside the linear light source support 8 will now be described with reference to FIG.
First, the linear light source 7 and the flat portions 8b and 8c of the linear light source support 8
Arrange them so that the open ends of them face each other. In addition, to the linear light source 7, the lead wire 9 is previously soldered to the terminal portion of the end portion, and the insulating covers 10 and 10 are attached. Next, the jig 20 is pushed in a state of being in contact with the insulating covers 10 and 10 at both ends of the linear light source 7, and the linear light source 7 is slid and moved. And with the insulating cover 10,
When the end portions of the flat portions 8b and 8c come into contact with each other, the flatness of the linear light source support body 8 is flexed and deformed to an open state in which the flat portions 8b and 8c are pushed outward by utilizing the spring property. The light source 7 is inserted inside. When the line light source 7 is inserted into the inside, the line light source support 8 is flexibly deformed into an expanded state in which the diameter is increased.
Is returned to its original state by the restoring force of the spring, and the line light source 7
Along with the effect of the constricted portion 8d, it is fixed without falling off. In addition, when removing the line light source 7 from the line light source support 8, similarly, while supporting the part of the insulating cover 10 on the end side of the line light source 7, both flat portions 8b and 8c are placed inside. Remove it by pushing it open from.

Next, the line light source 7 is internally provided as described above.
The linear light source support 8 to which the light guide plate unit 1 is attached.
Fig. 5 (a) shows the operation when attaching to and removing from
A description will be given based on (b) and FIGS. 6 (a) and 6 (b). Figure 5 (a)
As shown in (b), at the time of mounting, with the flat portion 8c side of the linear light source support 8 facing up and the plastic housing 5 side of the light guide plate unit 1 facing down, the arrow in the figure The linear light source support 8 is slid in the direction shown by the arrow, and at the open end of the linear light source support 8, a predetermined end side of the light guide plate unit 1, that is, the side end of the light guide plate 2 in the plastic housing 5. Is inserted, the flat portions 8b and 8c are pushed and expanded by the convex portion 5a, and the convex portion 5a of the plastic housing 5 is deformed by bending the flat portion 8b. Corresponding openings 8e provided in the flat portion 8b of the light source support.
To fit. At this time, since the convex portion 5a is formed in a tapered shape, the end face of the flat surface 8b can smoothly pass over the convex portion 5a. Thereby, the linear light source support 8 is attached to the light guide plate unit. Although not shown, the plastic housing 5 and the linear light source support 8 are fixed with screws thereafter.

On the other hand, at the time of removal, the plastic casing 5
After removing the screw that fixes the line light source support 8 to the line light source support 8, as shown in FIGS.
Flat part 8b.
8c is pushed and expanded, and the convex portion 5a is pulled out from the opening 8e by flexing and deforming to an expanded state in which the diameter is increased, and in this state, it is removed from the end of the light guide plate unit 1.

As described above, the linear light source support 8 in the backlight of this embodiment includes the bent portion 8a and the flat end portions 8b and 8b which are formed by extending both ends of the bent portion 8a and are substantially parallel to each other. The one side is open,
Since the constricted portion 8d is formed and has a spring property while covering the entire length of the linear light source 7, the width of the open end formed between the flat portions 8b and 8b of the light source support 8 is Even if the diameter of the linear light source 7 is smaller than that of the linear light source 7,
Are arranged in parallel so as to face the open end, and the linear light source 7 is slid horizontally in this state, whereby the flat portion 8b
The linear light source 7 can be inserted into the light source supporter 8 from the open end by pushing. This allows the linear light source to come into contact with the inner wall of the light source support during insertion, as in the case where the linear opening is inserted straight into the narrow inner space from the small opening provided at the longitudinal end of the conventional light source support. It is possible to improve work efficiency, enhance safety during work, suppress waste of members due to breakage, and eventually reduce manufacturing cost, without causing a situation such as causing damage and the like.

Further, since it is not designed to be slid in the axial direction for insertion, it is possible to previously attach a lead wire or an insulating cover to the linear light source 7, and to insert into the linear light source support as in the conventional case. It is not necessary to solder the lead wire in the above condition, which improves the workability of soldering, which also reduces the manufacturing cost.In addition, compared to the conventional insulation cover fitted afterwards, it is in use. Since the risk of falling off is also reduced, the safety of the device itself can be improved.

In this case, in this embodiment,
Since the bent portion 8a of the linear light source support 8 is formed in a shape that matches the outer peripheral shape of the insulating cover 10 at the end of the linear light source 7, the restoring force of the spring of the linear light source support 8 and the constriction are reduced. Since the insulating cover 10/10 portion of the inserted line light source 7 is firmly held by the catch of the portion 8d, the insulating cover 1
The linear light source 7 can be attached without any fear of contacting the linear light source support at all by a simple operation of simply supporting and inserting 0.10. As a result, it is possible to further improve the work efficiency and further reduce the manufacturing cost.

Further, in this embodiment, an opening 8e is formed in the flat portion 8b of the linear light source support 8 and a plastic housing 5 for supporting the light guide plate on the back surface of the light guide plate 2 is provided.
By further forming a convex portion on the plastic housing 5 and fitting the convex portion into the opening of the light source support, the linear light source support 8 can be detachably attached to the light guide plate unit 1. Since the linear light source 7 is attached, the linear light source 7 can be replaced by removing the linear light source support 8 without removing the entire light guide plate when replacing the linear light source 7. Time workability can be improved.

[0033]

As described above, in the illumination device according to the first aspect of the present invention, since the light source support has the spring property,
Even if the width of the open end formed between the flat parts of the light source support is smaller than the diameter of the linear light source, the light source lamps are arranged in parallel so as to face the open end and The light source lamp can be inserted into the light source support from the open end by sliding the light source lamp in the horizontal direction so as to spread the flat portion. This allows the light source lamp to come into contact with the inner wall of the light source support at the time of insertion, as in the case where the light source lamp is inserted straight into the narrow inner space through the small opening provided at the longitudinal end of the light source support. The effect that the work efficiency is improved, the safety at the time of work is improved, the waste of the member due to the damage is suppressed, and the manufacturing cost can be reduced, without causing a situation such as causing damage to the work. Play.

Further, since the light source lamp is slid and inserted in parallel from the open end along the longitudinal direction, it is possible to insert the light source lamp with the lead wire already soldered and the insulating cover attached. As a result, it is not necessary to solder the lead wire in a state where the lead wire is inserted into the light source support as in the conventional case, and the workability of soldering is improved to improve the work efficiency, and the manufacturing cost can be reduced. Further, as compared with the conventional insulating cover fitted afterward, the risk of falling off during use is reduced, and the safety of the device itself can be improved.

Further, as described above, the illumination device according to claim 2 is the illumination device according to claim 1, wherein the bent portion of the light source support is the outer periphery of an insulating cover provided at an end of the light source lamp. Since it is formed in a shape that matches the shape,
Due to the restoring force of the spring of the light source support and the constriction of the constricted part, the insulating cover part of the inserted light source lamp is firmly held, so the light source lamp can be easily operated by simply inserting and supporting the insulating cover. It can be attached without fear of contacting the support at all. As a result, the working efficiency is further improved, and further, the manufacturing cost can be further reduced.

Further, as described above, the lighting device according to claim 3 is the lighting device according to claim 1 or 2,
An opening is formed in a flat portion of the light source support, and a light guide plate support that supports a light guide plate on the back surface of the light guide plate, in which a convex portion is formed at a portion facing the opening of the light source support. A body is provided, and the light source support is detachably attached to the light guide plate by fitting this convex portion into the opening of the light source support, so when replacing the light source lamp, By removing the light source support without removing the light guide plate as in the conventional case, the light source lamp can be replaced, and the workability when replacing the lamp can be improved.

[Brief description of drawings]

FIG. 1 shows an embodiment of the present invention, which is a main part of a backlight including a light guide plate unit and a line light source support member that supports a line light source inside and is attached to a side end portion of the light guide plate unit. It is sectional drawing of a part.

FIG. 2 is a perspective view of the backlight.

FIG. 3 is a perspective view of a linear light source support provided in the backlight.

FIG. 4 is an explanatory view for explaining the assembling process of the backlight, and is an explanatory diagram for explaining the operation when the line light source is inserted into the line light source support.

5A and 5B are explanatory views for explaining the operation when the linear light source support is attached to the light guide plate unit in the backlight.

6A and 6B are explanatory views for explaining the operation when the linear light source support is detached from the light guide plate unit in the backlight.

FIG. 7 is a cross-sectional view of a main part showing a mounting state of a light guide plate and a linear light source support in a conventional backlight.

FIG. 8 is a perspective view of a linear light source support in a conventional backlight.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Light guide plate unit 2 Light guide plate 3 Diffusion sheet 4 Reflection sheet 5 Plastic housing (light guide plate support) 7 Line light source (light source lamp) 8 Line light source support (light source support) 8a Bent part 8b Flat part 8c Flat part 8d Constriction 8e Opening 8f Cutout 9 Lead wire 10 Insulation cover

Claims (3)

[Claims] 1. A thin tubular light source lamp is mounted in the vicinity of a side end portion of a light guide plate for transmitting light along a side end portion of the light guide plate via a light source support member fixed to the light guide plate. The light source support is composed of a bent portion having a substantially arcuate cross section along a side not facing the light guide plate of the light source lamp, and flat end portions substantially parallel to each other configured by extending both ends of the bent portion. An edge light type lighting device, which is open on one side and covers the entire length of a light source lamp, and in which the boundary between at least one flat portion and a curved portion is formed in a constricted shape over the entire longitudinal direction. A liquid crystal display device, wherein the body has a spring property. 2. The lighting device according to claim 1, wherein the bent portion of the light source support is formed in a shape that matches the outer peripheral shape of an insulating cover provided at the end of the light source lamp. . 3. A light guide plate in which an opening is formed in a flat portion of the light source support, and a convex portion is formed in a portion of the back surface of the light guide plate opposite to the opening of the light source support. A light guide plate support for supporting is provided, and the light source support is detachably attached to the light guide plate by fitting the convex portion into the opening of the light source support. The lighting device according to claim 1.