JPH08235921A - Illuminating device - Google Patents

Abstract

PURPOSE: To reduce the number of parts and improve assembling workability. CONSTITUTION: A plane light guiding plate 1 to transmit light, a light source 2 opposed to the end of the light guiding plate 1 and a lighting unit to light the light source 2 are provided. Light is transmitted from the light guiding plate 1 to an object 8 to be irradiated arranged in front of the light guiding plate 1 to visibly recognize information about the object 8. The lighting unit 5 is mounted at one end of a printed board 9 with a winder area than the light guiding plate 1, at least, and a reflecting part 9b to which silk printing is applied is formed at the other end of the printed board 9 beyond a lighting unit mounting part 9a to arrange the light guiding plate 1 in front thereof so that light from the light source 2 can be reflected in front of the light guiding plate 1.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an illuminating device.

[0002]

2. Description of the Related Art FIG. 6 shows a conventional illumination device.
This illuminating device mainly includes a light guide plate 1, a light source 2, a light source reflecting plate 3, a bottom reflecting plate 4, a lighting device 5, a main body 6, and a cover 7.

The light guide plate 1 is formed of a light-transmissive member in a substantially flat plate shape. One end face of the light guide plate 1 is provided with a fluorescent lamp 2 as a light source so as to face the fluorescent lamp 2. A light source reflection plate 3 having a substantially U-shaped cross section is disposed so that the light emitted from the fluorescent lamp 2 in a direction other than the end surface of the light guide plate 1 is reflected by the end surface of the light guide plate 1 to guide the light guide plate 1. It is designed to lead inside.

The bottom reflector 4 is arranged on the back side of the flat light guide plate 1 so that the light emitted from the inside of the light guide plate 1 to the back side is reflected to the front side of the light guide plate 1. It was done. The lighting device 5 is a so-called ballast that controls the lighting of the fluorescent lamp 2 which is a light source, and is attached to a mounting plate 5a such as a printed circuit board, and is opposite to the light guide plate 1 of the light source reflection plate 3. Is disposed on the non-light guide plate side.

The main body 6 is a box having a low height, which is opened to the front side, and the light guide plate 1, the fluorescent lamp 2, the light source reflector 3, and the bottom reflector which are formed as described above are provided inside. 4,
And the lighting device 5 and the like are housed, and the light guide plate 1 is provided on the front side thereof.
A cover 7 having a light transmitting portion 7a formed of a diffusive member that transmits the light emitted to the front side is attached.
That is, the bottom reflection plate 4 is housed and fixed near the one end side inside the main body 6, the light guide plate 1 is arranged on the front side thereof, and the other end side inside the main body 6 is arranged. , Light guide plate 1
The fluorescent lamp 2 and the light source reflection plate 3 are arranged and fixed so as to face the end portion of the lighting device 5, and the lighting device 5 mounted on the mounting plate 5a is housed on the other end side thereof. The cover 7 is disposed on the side so that the light transmitting portion 7 a thereof faces the light guide plate 1.

In the illuminating device constructed as described above, an object to be irradiated 8 such as a film is disposed on the front side of the light transmitting portion 7a of the cover 7 which is the front side thereof, and the light guide plate 1 and the light transmitting plate 8 are transmitted. The light from the fluorescent lamp 2 emitted through the portion 7a is
It is used to make information such as a video image recorded on the irradiated body 8 easily visible by shining the light on the irradiated body 8 and transmitting the light through the irradiated body 8.

[0007]

However, in the conventional illumination device configured as described above, in order to effectively use the light from the fluorescent lamp 2 which is the light source, the light from the fluorescent lamp 2 is used. Light source reflection plate 3 guided into the light guide plate 1
In addition to the above, the bottom reflection plate 4 that reflects the light emitted to the back surface side of the light guide plate 1 to the front surface side of the light guide plate 1 is necessary, and also because it is necessary to fix them, the number of parts of the illumination device is large. In addition, the fluorescent lamp 2 and the lighting device 5 are electrically connected, and the fluorescent lamp 2, the light source reflection plate 3, the bottom reflection plate 4, the light guide plate 1, the lighting device 5, and the like have a positional relationship. There is a problem that the workability of assembling is poor because it is necessary to keep it and store it in the main body 6.

Further, since the fluorescent lamp 2 as a light source and the lighting device 5 are arranged close to each other, the heat of the fluorescent lamp 2 affects the lighting device 5, and the weak heat inside the lighting device 5 is exerted. There was a problem of raising the temperature of the parts.

The present invention has been made in view of the above problems, and an object thereof is to provide an illuminating device having a small number of parts and good workability in assembly, and
Another object is to provide an illumination device in which the heat of the light source has less influence on other weak heat components.

[0010]

In order to solve the above problems, the present invention provides a flat light guide plate 1 for transmitting light and an end of the light guide plate 1 according to the present invention. And a lighting device 5 for lighting the light source 2. The light source 2 is provided on the irradiation target 8 arranged on the front side of the light guide plate 1. The object to be irradiated 8 that transmits light
In the illumination device for visually recognizing the information held by the lighting device 5, the lighting device 5 is mounted on at least one end side of the printed board 9 having a larger area than the light guide plate 1, and the lighting device mounting portion 9a A reflective portion 9b, which is silk-printed, is formed on the end side, and the light guide plate 1 is disposed on the front surface side of the reflective portion 9b to reflect the light from the light source 2 to the front surface side of the light guide plate 1. It is characterized by.

According to a second aspect of the present invention, in the illumination device according to the first aspect, the lighting device 5 is sandwiched at the other end of the light guide plate 1 with the light guide plate 1 interposed therebetween. The light source 2 is arranged so as to face each other, and the reflecting portion 9b is formed between the lighting device mounting portion 9a of the printed circuit board 9 and the portion where the light source 2 is arranged. Is.

According to a third aspect of the present invention, in the illumination device according to the first aspect, the light source 2 is disposed so as to face an end portion of the light guide plate 1 on one end side, and the light guide plate is provided. 1
10 for supplying electric power to the light source 2 at the other end of the battery 10
And the reflective portion 9b is formed between the battery 10 and the portion of the printed circuit board 9 on which the light source 2 is disposed.

[0013]

According to the present invention, the other end side of the printed circuit board 9 for mounting the lighting device 5 is silk-printed to form the reflecting portion 9b. The light that is located on the back side of the light plate 1 and goes out from the light guide plate 1 to the back side is reflected to the front side of the light guide plate 1. Therefore, it is necessary to provide a reflection plate on the back side of the light guide plate 1 separately from the printed circuit board 9. Is eliminated and the number of parts is reduced.
On the printed circuit board 9, the light guide plate 1, the light source 2, the lighting device 5, etc. can be assembled and electrically connected.

In addition to the function of the illuminating device according to claim 1, the lighting device 5 is provided at one end of the light guiding plate 1 with the light guide plate 1 interposed therebetween. Is disposed, and the light source 2 is disposed at the end portion on the other end side, and the light source 2 which is a heat source and the lighting device 5 are separated from each other by at least the width dimension of the light guide plate 1.

According to the invention of claim 3, in addition to the function of the illuminating device of claim 1, the light source 2 and the lighting device 5 are provided at one end side with the light guide plate 1 interposed therebetween. Is arranged,
A battery 10 which is a weak heat component is disposed at the end portion on the other end side, and the battery 10 is separated from the light source 2 and the lighting device 5 which are heat sources by at least the width dimension of the light guide plate 1.

[0016]

FIG. 1 shows a first embodiment of an illuminating device of the present invention. This illuminating device mainly comprises a light guide plate 1, a light source 2, a light source reflecting plate 3, a lighting device 5, The main body 6, the cover 7, and the printed circuit board 9 are provided.

The light guide plate 1 is formed of a transparent member such as transparent acrylic in a substantially flat plate shape, and a straight tube fluorescent lamp 2 serving as a light source is arranged to face one end surface of the light guide plate 1. On the non-light guide plate side of the fluorescent lamp 2, there is provided a light source reflection plate 3 having a substantially U-shaped cross section so as to wrap the fluorescent lamp 2 and an inner surface formed with high reflectance. The light emitted from the fluorescent lamp 2 in a direction other than the end portion direction of the light guide plate 1 is reflected to the end portion side of the light guide plate 1 and guided to the inside of the light guide plate 1.

The main body 6 is a thin box made of metal or resin having an opening on the front side, and inside thereof, the light guide plate 1, the fluorescent lamp 2, the light source reflection plate 3, the lighting device 5, and the print. It is formed to have a space for accommodating the substrate 9 and the like. Further, the cover 7 is made of metal or resin and has a main body 6
A light-transmissive portion 7 having a shape slightly larger than that of the present invention, which is a thin box body having an opening on the rear surface side, and which is formed of a diffusive member on the front surface side, for example, milky acrylic or the like and which transmits light.
a provided on the front side of the main body 6,
Is attached to the main body 6 so as to cover from the front side.

The printed circuit board 9 has a larger area than at least the light guide plate 1, and a printed circuit is formed on one end side of the printed circuit board 9 to form a lighting device mounting portion 9a, and the lighting device for lighting the light source 2 is formed. The components constituting No. 5 are mounted to form a so-called inverter type ballast. Further, the lighting device mounting portion 9 which is a part of the printed circuit board 9 on which the lighting device 5 is mounted.
On the other end side of a, a reflecting portion 9b whose surface is silk-printed to have a high reflectance is formed. In the figure, reference numeral 11 schematically shows a lead wire connecting between the lighting device 5 and the lamp terminal of the fluorescent lamp 2 which is the light source, or the lamp terminal itself.

In the illuminating device thus constructed, when assembled, the fluorescent lamp 2 as a light source and the light source for the light source are provided at one end on the front side of the reflecting portion 9b of the printed circuit board 9 having the lighting device 5 mounted at one end. The light guide plate 1 provided with the reflection plate 3 is placed, the fluorescent lamp 2 and the lighting device 5 and the like are electrically connected, and this is housed inside the main body 6, and the front side of the main body 6 is placed. The cover 7 is mounted so that the light transmitting portion 7 a faces the light guide plate 1. Then, in the same manner as in the above-mentioned conventional example, an irradiated object 8 that transmits at least a part of light, such as a film, is disposed on the front surface side of the light transmitting portion 7a of the cover 7, which is the front surface side thereof, and the light guide plate 1 and the light from the fluorescent lamp 2 emitted through the light transmitting portion 7a is applied to the irradiation target 8, and the light is transmitted through the irradiation target 8 such as a film to record on the irradiation target 8. It is used to make it easier to visually recognize the information such as the captured image.

With this structure, in the illumination device according to this embodiment, the other end of the printed circuit board 9 for mounting the lighting device 5 is silk-printed to form the reflecting portion 9a. 9a is located on the back side of the light guide plate 1 and reflects the light emitted from the light guide plate 1 to the back side to the front side of the light guide plate 1. Therefore, it is not necessary to provide a reflection plate on the back side of the light guide plate 1 separately from the printed circuit board 9,
There is no need for another reflector and the parts associated with its installation,
The number of parts of the illumination device is reduced, and further, the electrical connection between the light source 2 and the lighting device 5 on the printed circuit board 9 and the light guide plate 1 are achieved.
Alternatively, the light source 2, the lighting device 5, and the like can be assembled, and the workability of assembly is improved.

2 and 3 show a second embodiment of the illumination device of the present invention.
The present embodiment is different from the first embodiment in that the fluorescent lamp 2 as a light source and the reflection plate 3 for the light source are disposed at the positions, and the reflecting portion 9b and the light transmitting portion 7a are accompanied therewith. Position, the wiring between the lighting device 5 and the phosphor lamp 2,
Others are configured similarly to the first embodiment.

The fluorescent lamp 2 as a light source and the light source reflection plate 3 are provided facing the end portions of the light guide plate 1 on the side opposite to the side where the lighting device 5 is arranged. . That is, the lighting device 5 is mounted on one end side of the printed circuit board 9 as in the first embodiment, and the fluorescent lamp 2 serving as a light source and the fluorescent light thereof are mounted on the other end of the printed circuit board 9. A light source reflection plate 3 having a substantially U-shaped cross section so as to enclose the lamp 2 from the other end side and having an inner surface formed with high reflectance is provided, and the fluorescent lamp 2 and the end portion of the light guide plate 1 are disposed. Light emitted in a direction other than the direction is reflected toward the end of the light guide plate 1 and guided into the light guide plate 1.

On the printed circuit board 9, a space between the lighting device mounting portion 9a and the portion where the light source 2 is arranged is a silk-printed reflection portion 9b having a high reflectance, and the lighting device 5 is connected. Wiring for electrically connecting the fluorescent lamps 2 is formed as a pattern 9c on the back surface side of the printed circuit board 9, and the lamp terminals of the fluorescent lamp 2 are soldered in the vicinity of the tips thereof. The light transmitting portion 7a formed on the cover 7 is also provided at a position facing the reflecting portion 9b via the light guide plate 1 in a state where the printed circuit board 9 is housed in the main body 6.

With this structure, in the illumination device of this embodiment, in addition to the effect of the first embodiment, the light guide plate 1 is sandwiched and the end portion on the one end side of the light guide plate 1 is provided. A lighting device 5 is arranged on the side, and a fluorescent lamp 2 which is a light source is arranged on the side of the end portion on the other end side, which has a fluorescent lamp 2 which is a heat source and parts vulnerable to heat. The lighting device 5 is separated from the lighting device 5 by at least the width dimension of the light guide plate 1, and
The weak heat component used for is less susceptible to the thermal influence from the fluorescent lamp 2 which is a heat source, the temperature rise of the lighting device 5 is suppressed, and the reliability with respect to the temperature of the lighting device 5 is improved. Further, the wiring between the lighting device 5 and the fluorescent lamp 2 is formed as the pattern 9c on the printed circuit board 9, so that a lead wire for that is not required, and it is not necessary to provide the wiring space.

FIGS. 4 and 5 show a third embodiment of the illumination device of the present invention.
This embodiment is different from the first embodiment in that the battery 10 that supplies electric power to the light source 2 via the lighting device 5 is provided at the side of the end portion on the other end side of the light guide plate 1. Battery 1
0 and the lighting device mounting portion 9a are printed on the printed circuit board 9 to form a reflective portion 9b having a high reflectance by silk-printing, and the light transmitting portion 7a of the cover 7 is assembled to form the light guide plate 1. It is provided at a position facing the reflecting portion 9b with the
In addition, the wiring between the battery 10 and the lighting device 5 is formed as a pattern 9c on the back surface side of the printed board 9,
Others are configured similarly to the first embodiment.

That is, the battery 10 is housed in the housing portion 6a provided in the main body 6 on the side of the other end side of the light guide plate 1, which is the other end side of the main body 6, and is printed. Board 9
Is disposed on one end side of the main body 6 with respect to the storage portion 6a,
The fluorescent lamp 2, which is a light source, is arranged to face the battery 10 with the light guide plate 1 arranged at one end of the battery 10 interposed therebetween. Further, at both ends of the battery 10, electrodes 13 connected to the lead wires 12 extending from the pattern 9c of the printed board 9 are arranged so as to be in contact with the electrodes of the battery 10.

Since the illumination device of this embodiment is constructed as described above, in addition to the effects of the first embodiment,
A fluorescent lamp 2 as a heat source and a lighting device 5 are arranged laterally to one end of the light guide plate 1 with the light guide plate 1 sandwiched therebetween, and the other end of the light guide plate 1 is extremely vulnerable to heat. The battery 10 is arranged, and the fluorescent lamp 2 and the lighting device 5 which are the heat sources of the battery 10
Away from the battery 10 by at least the width dimension of the light guide plate 1.
Is less likely to be thermally affected by the fluorescent lamp 2 and the lighting device 5, the temperature rise of the battery 10 is suppressed, and the reliability of the battery 10 with respect to the temperature is improved. Furthermore, the battery 10
Since the wiring between the lighting device 5 and the lighting device 5 is formed as the pattern 9c on the printed circuit board 9, there is no need for a lead wire for that and it is not necessary to provide a wiring space therefor.

In each of the above embodiments, the light source reflection plate 3 is described as having a substantially U-shaped cross section, but the present invention is not limited to this, and the cross section is formed in a substantially U shape. Needless to say, it may be the one as described above.

[0030]

Since the present invention is configured as described above, in the invention according to claim 1, the silk-printed reflection portion on the other end side of the printed circuit board for mounting the lighting device is provided. , The light that is located on the back side of the light guide plate and goes out from the light guide plate to the back side is reflected to the front side of the light guide plate, so that it is not necessary to provide a reflection plate on the back side of the light guide plate separately from the printed circuit board. , A separate reflector and parts for mounting the same are not required, and the number of parts of the illumination device is reduced. Furthermore, the light source, the light guide plate, the lighting device, etc. can be assembled on the printed circuit board, and the workability of assembly is improved. Is improved.

In addition to the effect of the invention according to claim 1, in the invention according to claim 2, a lighting device is provided on the side of one end of the light guide plate with the light guide plate interposed therebetween. A fluorescent lamp, which is a light source, is disposed on the side of the end portion on the other end side, and the fluorescent lamp, which is a heat source, and the lighting device having a heat-sensitive component are at least the width dimension of the light guide plate. Therefore, the weak heat components used in the lighting device are less likely to be thermally affected by the fluorescent lamp that is the heat source, the temperature rise of the lighting device is suppressed, and the reliability of the lighting device with respect to the temperature is improved.

According to the invention of claim 3, in addition to the effect of the invention of claim 1, there is a heat source on the side of one end of the light guide plate with the light guide plate interposed therebetween. A fluorescent lamp and a lighting device are arranged, a battery extremely weak against heat is arranged on the side of the other end side, and the battery is at least the width of the light guide plate from the fluorescent lamp and the lighting device which are heat sources. Away,
The battery is less likely to be thermally affected by the fluorescent lamp and the lighting device, the temperature rise of the battery is suppressed, and the reliability of the battery temperature is improved.

[Brief description of drawings]

FIG. 1 is an exploded perspective view showing a first embodiment of an illumination device of the present invention.

FIG. 2 is an exploded perspective view showing a main part of a second embodiment of the illumination device of the present invention.

FIG. 3 is a side view of the main part of the above.

FIG. 4 is an exploded perspective view showing a third embodiment of the illumination device of the present invention.

FIG. 5 is a perspective view of the above-mentioned different disassembled state.

FIG. 6 is an exploded perspective view showing a conventional illumination device.

[Explanation of symbols]

 1 Light guide plate 2 Light source 5 Lighting device 8 Irradiation object 9 Printed board 9a Lighting device mounting part 9b Reflecting part 10 Battery

Claims (3)

[Claims] 1. A light guide plate comprising: a flat light guide plate that transmits light; a light source disposed to face an end of the light guide plate; and a lighting device for lighting the light source. In an illuminating device for transmitting light from a light guide plate to an object to be irradiated arranged on the front side of the device and visually recognizing information of the object to be irradiated, the lighting device has a printed circuit board having a larger area than at least the light guide plate. And a light guide plate is disposed on the front side of the reflection part, the reflection part being silk-printed on the other end side of the lighting device mounting part of the printed circuit board. An illuminating device characterized in that light from the inside is reflected to the front side of the light guide plate. 2. The light source is arranged at the other end of the light guide plate so as to substantially face the lighting device with the light guide plate interposed therebetween, and the lighting device mounting portion of the printed board and the lighting device mounting portion are provided. The illumination device according to claim 1, wherein the reflecting portion is formed between the portions where the light source is arranged. 3. The light source is arranged so as to face one end of the light guide plate, and a battery for supplying electric power to the light source is arranged at the other end of the light guide plate. The illumination device according to claim 1, wherein the reflecting portion is formed between a portion of the printed circuit board where the light source is disposed and a battery.