JP3073340B2 - Light guide plate device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a liquid crystal backlight,
The present invention relates to a light guide plate device used for a backlight for a signboard of an advertisement or the like, a lighting fixture, and the like.

[0002]

2. Description of the Related Art As shown in FIG. 5, a light guide plate device is provided with a light guide plate 3 having one surface as a light emitting surface 1 and the other surface as a reflective surface 2, and a light source outside an end surface 4 of the light guide plate 3. The light from the light source lamp 5 is incident on the end face 4 of the light guide plate 3, the light incident on the light guide plate 3 is reflected by the reflection surface 2, and the light emission surface 1 side emits light. In this type of conventional light guide plate device, a lamp holder 6 for holding a light source lamp 5 is provided separately from the light guide plate 3 as shown in FIG.
The lamp holder 6 is detachably fixed to the light guide plate by fixing means such as a clip (for example, Japanese Patent Laid-Open No. 4-102).
888).

[0003]

Conventionally, however, when manufacturing a light guide plate device, a lamp holder 6 is formed separately from the light guide plate 3 and then the lamp holder 6 is fixed to the light guide plate 3. And the manufacture of the light guide plate device was very troublesome. Further, as the characteristics of the light guide plate device, the center of the light source lamp 5 and the center line of the thickness of the light guide plate 3 are aligned, and the tube wall of the light source lamp 5 and the light guide plate 3 are further aligned.
When the distance from the end surface 4 is 0.5 to 1.5 mm, the luminance of the light emitting surface 1 is the highest, but the mounting position of the lamp holder 6 with respect to the light guide plate 3 varies, and the light guide plate 3 There was a possibility that the lamp 5 could not be installed at the optimum position.

The present invention has been made in view of the above-mentioned problems, and can be easily manufactured, so that a light source lamp can be easily assembled at an optimum position with respect to a light guide plate.

[0005]

The technical means of the present invention for solving this technical problem comprises a light guide plate 11 having a light emitting surface 12 on one side and a reflective surface 13 on the other side. The light source lamp 24 is provided outside the end face 25 of the light guide 11, and the light of the light source lamp 24 is incident from the end face 25 of the light guide plate 11, and the light incident on the light guide plate 11 is reflected by the reflection surface 13, and the light emission surface In the light guide plate device that emits light on the side 12, a lamp holder 18 for holding both ends of the light source lamp 24 is provided integrally with the light guide plate 11, and the lamp holder 18 is integrally formed with the light guide plate 11. A fitting recess 19 for fitting and holding both ends of the light source lamp 24 and an insertion recess 20 for inserting the cables 27 connected to both ends of the light source lamp 24 are provided in the lamp holder 18. Joint recess 1 And the insertion recess 20, in that it is Botsu設 formed in the lamp holder 18 so that its light-emitting surface 12 side is opened in succession.

[0006]

When the light guide plate device is manufactured, the lamp holder 6 may be integrally formed on the light guide plate 3 and the light source lamp 24 may be mounted on the lamp holder 6, so that the manufacture or assembly of the light guide plate device is very simple. In addition, the position of the lamp holder 6 with respect to the light guide plate 3 does not vary.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to the illustrated embodiment. In FIGS. 1 to 4, reference numeral 11 denotes a rectangular light guide plate made of acrylic resin, one surface serving as a light emitting surface 12 and the other surface serving as a light emitting surface. The reflecting surface 13 is provided. A light diffusing plate 14 made of, for example, a polycarbonate film is provided on a light emitting surface 12 of the light guide plate 11. A reflection plate 15 made of, for example, a polyethylene film is provided on the reflection surface 13 of the light guide plate 11. Is provided.

Reference numeral 18 denotes a lamp holder, which is provided integrally at four corners of the light guide plate 11. This lamp holder 18
Is integrally formed together with the light guide plate 11, and a fitting recess 19 and an insertion recess 20 are formed in each lamp holder 18 in an L-shape. The light diffusing plate 14 is integrally provided with a mounting plate portion 21, and the mounting plate portion 21 corresponds to each of the lamp holders 18. 14 is attached on the light emitting surface 12 of the light guide plate 11. Although not shown, the reflecting plate 15 is integrally provided with mounting plate portions corresponding to the lamp holders 18 similarly to the light diffusion plate 14, and the mounting plate portions are welded to the lamp holders 18. As a result, the reflection plate 15 is
Is attached on the reflective surface 13. As a result, since the welded portions of the light diffusion plate 14 and the reflection plate 15 are separated from the effective light emitting area of the light guide plate 11, the light diffusion plate 14 and the reflection plate 1 are removed.
It is not necessary to exert an adverse effect such as abnormal light emission due to the attachment of 5 on the effective light emitting area of the light guide plate 11.

The mounting plate portion of the light diffusion plate 14 and the reflection plate 15 may be attached to the light guide plate 11 by a double-sided adhesive tape instead of welding. Reference numeral 24 denotes a pair of light source lamps, which are disposed outside both end faces 25 of the light guide plate 11 so that light from the light source lamp 24 enters the light guide plate 11 from the end face 25 of the light guide plate 11. Both ends of each light source lamp 24 are fitted and held in fitting recesses of the corresponding lamp holder 18. Terminals 26 protruding from both ends of each light source lamp 24 and a cable 27 connected to the terminals 26 are inserted into the insertion recesses 20 of the lamp holder 18,
The cable 27 is led out from the insertion recess 20. The fitting concave portion 19 and the insertion concave portion 20 are filled with a silicon-based adhesive 28, and the adhesive 28 secures both ends of the light source lamp 24, the terminal 26 and the cable 27 to the lamp holder 18, and 26 and the cable 27 are insulated.

Reference numeral 29 denotes a light-shielding cover, which is formed, for example, by attaching a silver vapor-deposited film to the inner surface of a polyethylene film. Is covered. Both ends of the light-shielding cover 29 are adhered to the outer end of the light guide plate 11 via a double-sided adhesive tape 30.

[0011]

According to the present invention, the light guide plate 11 is provided integrally with the lamp holders 18 for holding both ends of the light source lamp 24, and the lamp holder 18 is formed integrally with the light guide plate 11. since, it is sufficient attachment of the light source lamp 24 to the lamp holder 18 which is integrally formed on the light guide plate 11, fabrication or assembly of the light guide plate unit may no easy simply. Further, there is no variation in the position of the lamp holder 18 with respect to the light guide plate 11, and the light source lamp 24 can be easily incorporated into the light guide plate 11 at an optimum position.

Further, the both ends of the light source lamp 24 are fitted and held.
Connected to both ends of the fitting recess 19 to be held and the light source lamp 24
And the insertion recess 20 through which the inserted cable 27 is inserted.
The lamp holder 18 is provided with
The light emitting surface 12 side of the recess 20 is continuously open.
Is formed in the lamp holder 18 so that
To fit the light source lamp 24 into the mating recess 19,
Both ends of the lamp 24 are fitted in the fitting recess 19 with the light emitting surface 12 thereof.
It may be inserted from the opening on the side and fitted.
On the other hand, both ends of the light source lamp 24 are easily fitted simultaneously.
Can be In addition, the fitting recess 19 is used for the light source.
When fitting both ends of the lamp 24, the light source lamp 24
Cable 27 connected to both ends of
Then, it can be inserted from the opening on the light emitting surface 12 side,
Same as the fitting of both ends of the light source lamp 24 into the fitting recess 19.
Sometimes the cable 27 can be easily inserted into the insertion recess 20
can do. Therefore, also from this point, the light guide plate 11
Incorporating the light source lamp 24 more easily
And the manufacture or assembly of the light guide plate device is extremely
Can be done easily.

Further, it is connected to both ends of the light source lamp 24.
By inserting the cable 27 into the insertion recess 20,
The cable 27 can be stably held,
The cable 27 is distorted or bent, and outside the cable 27
The direction of the lead-out to the
The wiring of the cable 27 can be made very easy.
You. Also, for example, the fitting recess 19 and the insertion recess 20
By filling an adhesive or the like from the opening on the light emitting surface 12 side,
And both ends of the light source lamp 24 with an adhesive or the like.
Next, the cable 27 is easily fixed to the lamp holder 18.
The cable 2 can be used during wiring and assembly of the light guide plate device.
7 from the light source lamp 24 unexpectedly.
Can be effectively prevented.

[Brief description of the drawings]

FIG. 1 is a perspective view showing one embodiment of the present invention.

FIG. 2 is an exploded perspective view showing one embodiment of the present invention.

FIG. 3 is a side sectional view showing one embodiment of the present invention.

FIG. 4 is a plan view of a light guide plate showing one embodiment of the present invention.

FIG. 5 is a side sectional view showing a conventional example.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 11 Light guide plate 12 Light emission surface 13 Reflection surface 18 Lamp holder 24 Light source lamp 25 End surface

──────────────────────────────────────────────────続 き Continued on the front page (58) Fields investigated (Int. Cl. ⁷ , DB name) G02B 6/00 331 F21V 8/00 601 G02F 1/13357

Claims (1)

(57) [Claims] 1. A light guide plate (1) having one surface as a light emitting surface (12) and the other surface as a reflective surface (13).
The light source lamp (24) is provided outside the end face (25) of 1), and the light of the light source lamp (24) is incident from the end face (25) of the light guide plate (11) and is incident on the light guide plate (11). The light guide plate (11) holds both ends of the light source lamp (24) in a light guide plate device in which the reflected light is reflected by the reflection surface (13) to emit light on the light emitting surface (12) side. provided in the lamp holder (18) is integral, the lamp holder (18) is molded integrally with the light guide plate (11), fitting recess for fitting holding the opposite ends of the lamp (24)
(19) and both ends of the light source lamp (24).
The insertion recess (20) through which the cable (27) is inserted is
The lamp holder (18) is provided with these fitting recesses.
(19) and the insertion concave portion (20) have a light emitting surface (12).
Submerged in lamp holder (18) so that sides open continuously
A light guide plate device, which is provided and formed .