JPH08235923A - Illuminating device - Google Patents

Abstract

PURPOSE: To improve assembling workability. CONSTITUTION: A plane light guiding plate 1, a lamp 2 opposed to the end of the light guiding plate 1 and a lighting unit 4 to light the lamp 2 are encased in a case 5 which is formed with a cover 8 having a light transmissive window 8a made of diffusive material on the front side and a body 7 to mount the cover 8 thereon so as to oppose the light guiding plate 1 to the light transmissive window 8a. Light is transmitted to an object arranged in front of the light transmissive window 8a via the light guiding plate 1 to visibly recognize information about the object. The first reflecting part 9 is formed on the opposite side of the light guiding plate 1 for the lamp 2 into one unit with the case 5 to reflect light from the lamp 2 to the end 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. 9 shows a conventional illumination device (first conventional example). This illumination device mainly comprises a light guide plate 1.
And a lamp 2, a reflector 3, a lighting device 4, and a case 5.

The light guide plate 1 is formed of a light-transmissive member into a substantially flat plate shape. One end surface of the light guide plate 1 is provided with a fluorescent lamp 2 as a lamp so as to face the fluorescent lamp 2. On the side opposite to the light plate 1, a reflection plate 3 having a substantially U-shaped cross section is arranged so as to enclose the fluorescent lamp 2, and is disposed so as to sandwich the light guide plate 1 at the tip end side of the substantially U-shaped opening. Light emitted from the 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 and guided into the light guide plate 1.

The lighting device 4 is a fluorescent lamp 2 which is a lamp.
Is a so-called ballast that controls lighting of the fluorescent lamp 2 and is disposed on the non-light guide plate side of the reflection plate 3 opposite to the light guide plate 1. The fluorescent lamp 2 and the lighting device 4 are electrically connected by the wiring 6. It is connected to the.

The case 5 is a box body having a low height, and has a body 7 having a rising portion 7b at the peripheral edge of the bottom portion 7a and opening to the front side, and a substantially plate-like shape so as to close the opening of the body 7. The cover 8 is disposed and has a cover 8 provided on one side thereof with a light-transmissive window 8a formed of a diffusive member.

The light guide plate 1, the lamp 2, the reflector 3 and the lighting device 4 thus constructed are housed in a body 7, and a cover 8 is provided on the front side thereof, the light guide plate 1 and the transparent window. 8a
Are arranged so as to face each other, and the cover 8 is assembled by being attached to the body 7 by screwing or fitting.

The illuminating device having the above structure is provided with a transparent window 8a of the cover 8, which is the front side of the case 5.
On the front side of, for example, arrange the irradiated object such as a film,
The light from the fluorescent lamp 2 emitted through the light guide plate 1 and the translucent window 8a is applied to the object to be irradiated, and the light is transmitted through the object to be irradiated, such as a film, so that it is recorded on the object to be irradiated. It is used to make information such as images easier to see.

FIGS. 10 and 11 show another conventional illuminating device (second conventional example), and the different points from the first conventional example of this illuminating device are the case 5 and the LED 12. The others are configured similarly to the first conventional example.

The case 5 is formed by partitioning the end of the body 7 on the side opposite to the side on which the light guide plate 1 is disposed, and the cover 8 is
It is substantially plate-shaped and is arranged so as to close the opening of the body 7,
Similar to the first conventional example, a part thereof is provided with a light-transmitting window 8a formed of a diffusive member.
A display panel 8b made of a translucent member is provided at a predetermined distance from the translucent window 8a, and a plurality of LEDs are provided on the bottom 7a side of the body 7 of the display panel 8b.
12 are provided.

As in the first conventional example, the illuminating device constructed as described above accommodates the light guide plate 1, the lamp 2, the reflecting plate 3, the lighting device 4, the LED 12 and the like in the body 7,
The cover 8 is arranged on the front side so that the light guide plate 1 and the translucent window 8a face each other, and the cover 8 is assembled by being attached to the body 7 by screwing, fitting, or the like. Used like the example, this time
The LED 12 is turned on and emits light so that it can be visually recognized from the front side of the display panel 8b of the cover 8 to perform the display.

FIG. 12 shows a further conventional illumination device (third conventional example). The difference between this illumination device and the first conventional example is that the reflector 3 and the cover of the case 5 are covered. 8
Others are configured similarly to the first conventional example.

The cover 8 of the case 5 is arranged so as to close the opening of the body 7, and is provided with a light-transmitting window 8a formed in a part thereof by a diffusive member, as in the first conventional example. In addition to that, at a predetermined distance from the translucent window 8a,
A display panel 8b formed of a translucent member is provided and formed, and the bottom portion 7 of the body 7 of the display panel 8b is formed.
The fluorescent lamp 2 is arranged on the a side.

The reflecting plate 3 is disposed on the opposite side of the light guide plate 1 of the fluorescent lamp 2 and is formed in a substantially L-shaped cross section so as to guide the light from the fluorescent lamp 2. It is configured to reflect on both the light plate 1 and the display panel 8b.

The reflector 3 thus constructed is housed in the body 7 together with the light guide plate 1, the lamp 2, the lighting device 4 and the like as in the first conventional example, and the front side thereof is covered. 8 is disposed so that the light guide plate 1 and the translucent window 8a face each other, and the cover 8 is screwed or fitted to the body 7
It is assembled by being attached to and is used in the same manner as the second conventional example.

[0015]

However, in the illumination device shown in the first conventional example configured as described above, the fluorescent lamp 2 which is a lamp is assembled at the time of assembly.
And the lighting device 4 are electrically connected, and the fluorescent lamp 2
Must be housed in the body 7 of the case 5 in such a manner that the fluorescent lamps 2 are opposed to the ends of the light guide plate 1 and the fluorescent lamp 2 is wrapped in the reflector plate 3.
The lamp 2, the reflector 3, the lighting device 4, etc. are assembled outside the case 5, and they are housed in the body 7 of the case at the same time. There is a problem in that the workability of assembly is poor because it is necessary to take into consideration work such as not applying stress to the mechanical connection part.

In the illumination device shown in the second conventional example, the fluorescent lamp 2 and the plurality of LEDs 12 are used as the light source.
In addition to the need to supply electric power to the LED 12, the number of assembling steps is increased, resulting in poor workability.

Further, in the illumination device shown in the third conventional example, the light from one fluorescent lamp 2 is divided into the light guide plate 1 and the display panel 8b side by utilizing the reflection by the reflection plate 3. Since it is only present, almost the same amount of light goes to both sides. Therefore, the display panel 8b directly receives the direct light from the fluorescent lamp 2 and the reflected light from the reflecting plate 3. However, since the translucent window 8a receives light through the light guide plate 1 and has a large area for emitting light, the translucent window 8a becomes dark and the required brightness cannot be ensured. there were.

The present invention has been made in view of the above problems, and an object of the present invention is to provide an illuminating device having good assembly workability, and another object thereof is a lamp. An object of the present invention is to provide an illuminating device capable of ensuring the necessary brightness on the front surface side of the light guide plate even when the light from the device is emitted in a direction other than the light guide plate.

[0019]

In order to solve the above problems, the present invention provides a flat light guide plate 1 and an end portion of the light guide plate 1 facing each other. The lamp 2 arranged as a unit and the lighting device 4 for lighting the lamp 2, a cover 8 having a translucent window 8a formed of a diffusive member on the front side, and the cover 8 are mounted. In an illuminating device in which the light guide plate 1 is housed in a case 5 composed of a body 7 so as to face the translucent window 8a, the lamp 5 is integrally formed with the case 5 on the side opposite to the light guide plate 1. The lamp 2
First reflecting portion 9 that reflects the light from the side toward the end portion of the light guide plate 1
Is formed.

According to the invention of claim 2, in the illumination device of claim 1, at least the surface of the first reflecting portion 9 on the light guide plate 1 side is mirror-finished with a metal member. It is characterized by being formed.

Further, in the invention according to claim 3, in the illumination device according to claim 1 or 2, wiring for connecting the lighting device 4 and the lamp 2 to the first reflecting portion 9 It is characterized in that a wiring insertion hole 9a through which 6 is inserted is provided.

Further, in the invention according to claim 4, in the illuminating device according to any one of claims 1 to 3, the cover 8 is provided with the transparent window 8a and a predetermined portion. A display panel 8b formed of a translucent member is provided at a distance, and a slit 9b communicating from the lamp 2 side to the side opposite to the light guide plate 1 is provided at a substantially central portion of the first reflecting portion 9 in a side view. And between the first reflecting portion 9 and the case 5 on the opposite side of the case 5 from the side on which the light guide plate 1 is provided,
A second reflecting portion 10 for reflecting the light passing through the slit 9b to the display panel 8b side is formed.

According to the invention of claim 5, in the illumination device of claim 4, the slit 9b is
It is characterized in that the slit 9b and the center of the lamp 2 and the center line in the direction parallel to the surface of the conductive plate 1 are formed to be located substantially on the same straight line in a side view.

[0024]

With the above construction, according to the invention of claim 1, the first reflecting portion 9 for reflecting the light from the lamp 2 toward the end portion of the light guide plate 1 is provided with the case 5. Since it is formed integrally and does not need to be attached to the light guide plate 1,
At the time of assembly, the light guide plate 1 is housed in the body 7, then the electrically connected lamp 2 and the lighting device 4 are housed in the body 7, and the cover 8 is attached to the assembly.

According to the invention of claim 2, in addition to the function of the illumination device of claim 1, the surface of the first reflecting portion 9 arranged in the vicinity of the lamp 2 is a mirror surface. Since it has a high reflectance, the light from the lamp 2 is effectively reflected to the end portion of the light guide plate 1, and the first reflecting portion 9 is made of metal, so that the first reflecting portion 9 is close to it. Serves as a conductor.

According to the invention of claim 3, in addition to the function of the illumination device of claim 1 or 2, the wiring insertion hole 9a provided in the first reflecting portion 9 is The wiring 6 that connects the lighting device 4 and the lamp 2 is held so that a force due to vibration or impact is less likely to be applied to the connection portion of the wiring 6.

Further, in the invention described in claim 4, in addition to the operation of the illumination device described in one of claims 1 to 3, the first reflecting portion 9 is provided with the lamp 2 Most of the light of the above is reflected to the light guide plate 1 side, and the slit 9b
Only allows some of the light to pass through and some of that light is
Since the light is reflected by the reflecting portion 10 and guided to the display panel 8b, a large amount of light can be guided to the transparent window 8a, and the transparent window 8a and the display panel 8b can have substantially the same brightness.

According to the invention of claim 5, in addition to the function of the illumination device of claim 4, the slit 9b is provided with the light from the lamp 2 of the first reflecting portion 9 on the light guide plate 1 side. Is provided at a position where it is difficult to be reflected by the first reflection part 9
It is unlikely to affect the amount of light reflected from the light guide plate 1 side.

[0029]

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 fluorescent lamp 2 as a lamp, a lighting device 4 and a case 5. And is configured.

The light guide plate 1 is formed in a substantially flat plate shape by a transparent member such as transparent acrylic, and a straight tube fluorescent lamp 2 which is a lamp is arranged so as to face one end surface thereof. Has been done. Further, the lighting device 4 includes the fluorescent lamp 2
Is a so-called ballast that controls the lighting of the lamp, and is electrically connected to the fluorescent lamp 2 by the wiring 6.

The case 5 is a box body having a low height, and has a body 7 having a rising portion 7b at the peripheral edge of the bottom portion 7a and opening to the front side, and a substantially plate-like shape so as to close the opening of the body 7. The cover 8 is disposed and has a cover 8 provided on one side thereof with a light-transmissive window 8a formed of a diffusive member. Further, in the vicinity of the one end side of the case 5, the cover 8 and the inner surface side of the body 7 in the portion where the light-transmissive window 8a is not provided respectively project so as to face each other, and the tip end abuts during assembly. The reflecting portion 9 is formed. Then, the first reflecting portion 9 is formed so as to open toward the other end side of the case 5 in the assembled state of the case 5, and the surface shape on the opened side is substantially C-shaped in cross section. Therefore, the light incident from the fluorescent lamp 2 side which is the other end side of the case 5 is reflected to the light guide plate 1 side which is the other end side, and the fluorescent lamp 2 is held at both ends thereof. .

In such an illuminating device, the assembly is carried out by housing the conductive plate 1 at the other end side of the body 7 of the case 5, and electrically connecting the fluorescent plate 2 and the wiring 6 to one end side of the case 5. The illuminated lighting device 4 is housed, and the cover 8 is attached to the front side thereof. At this time, the lighting device 4 is housed at one end side of the first reflecting portion 9, and the fluorescent lamp 2 is placed in the first
Between the other end of the reflection part 9 and the end of the light guide plate 1,
The cover 8 is housed so as to face the end portion of the light guide plate 1, and the cover 8 is mounted on the front surface side of the light guide plate 1 so that the translucent windows 8 a are located opposite to each other. Then, it is used for the same purpose as the first conventional example.

With this structure, in the illumination device of this embodiment, the first reflecting portion 9 for reflecting the light from the fluorescent lamp 2 toward the end of the light guide plate 1 is integrated with the case 5. Since it is not necessary to attach it to the light guide plate 1, the lamp 2 and the lighting device 4 electrically connected to each other are housed in the body 7 after assembling the light guide plate 1 in the body 7 during assembly. If the cover 8 is stored and attached, the first reflecting portion 9 is formed, and it is not necessary to assemble the reflecting plate separately, and the workability of assembling is good.

2 and 3 show a second embodiment of the present invention. The difference from the first embodiment is that the first embodiment is different from the first embodiment.
This is a wiring insertion hole 9a provided in the reflection part 9 of the above, and is otherwise configured similarly to the first embodiment.

The wiring insertion hole 9a is provided for inserting the wiring 6 for connecting the fluorescent lamp 2 and the lighting device 4 into the first reflecting portion 9, and the vicinity of both ends of the first reflecting portion 9 is provided. And is dimensioned so that the wiring 6 can be substantially held. The wiring insertion hole 9a is formed in a groove shape on the tip side of the first reflecting portion 9 formed on the body 7 when the cover 8 is removed.

Due to this structure, in the illumination device of this embodiment, in addition to the effects of the first embodiment, the wiring insertion hole 9a provided in the first reflecting portion 9 is provided.
However, the wiring 6 that connects the lighting device 4 and the lamp 2 is held, and it is difficult to apply a force due to vibration or shock to the connection portion of the wiring 6, and vibration resistance and shock resistance are improved.

FIG. 4 shows a third embodiment of the illumination device of the present invention. The difference from the second embodiment is that at least the cross section of the first reflecting portion 9 on the light guide plate 1 side is different. The substantially C-shaped surface is mirror-finished with a metal member, and the other parts are configured similarly to the second embodiment.

Due to such a constitution, in the illumination device of this embodiment, in addition to the effect of the second embodiment, the first reflecting portion 9 arranged close to the lamp 2 is provided. Since the surface is a mirror surface and has a high reflectance, the light from the lamp 2 is effectively reflected by the end portion of the light guide plate 1 without lowering the efficiency of the device, and the first reflecting portion 9 is made of metal. Since it is manufactured, the first reflecting portion 9 serves as a proximity conductor, the startability of the fluorescent lamp 2 is improved, the secondary voltage of the lighting device 4 can be lowered, and the small size of the lighting device 4 is achieved. Can be realized.

FIG. 5 and FIG. 6 show a fourth embodiment of the illumination device of the present invention.
Of the lighting device 4 and its mounting structure, the connection structure of the lamp 2 and the lighting device 4, and the shape of the wire insertion hole 9a. The configuration is similar to that of the second embodiment.

The lighting device 4 is a so-called inverter type ballast, is formed by being mounted on the printed circuit board 11, and is attached to the case 5 via the printed circuit board 11. Further, both ends of the end portion of the printed circuit board 11 opposite to the mounting portion of the lighting device 4 are formed as protrusions 11 a, and the protrusion 11 a has a fluorescent lamp 2 as a lamp.
Is provided and its terminals are soldered, and the protrusion 1
A wiring 6 between the lamp 2 and the lighting device 4 is formed in a pattern on the la 1a. Further, the wiring insertion hole 9a is formed to be wide, and is formed so that the protruding portion 11a of the printed board 11 is inserted and held.

With this structure, in the illumination device of this embodiment, in addition to the effects of the second embodiment, the fluorescent lamp 2 and the lighting device 4 include the printed circuit board 1.
It is possible to assemble on 1 and the workability of assembly is further improved.

FIG. 7 shows a fifth embodiment of the illuminating device of the present invention. The difference from the first embodiment is that the case 5, the first reflecting portion 9 and the second reflecting portion are different from each other. The other parts are the same as those of the second embodiment.

The case 5 is a box body having a low height, and has a body 7 having a rising portion 7b at the peripheral edge of the bottom portion 7a and opening to the front side, and a substantially plate-like shape so as to close the opening of the body 7. A display window 8 formed of a translucent window formed of a diffusive member and a translucent member provided at a predetermined distance from the translucent window 8a while being disposed.
and a cover 8 provided with b.

The first reflecting portion 9 is provided independently of the case 5, and the fluorescent lamp 2 which is a lamp arranged facing the end portion of the light guide plate 1 is attached to the light guide plate 1 of the fluorescent lamp 2. The cross section is formed into a substantially C shape so that it can be wrapped from the side opposite to
The opening side is arranged so as to face the light guide plate 1 side, and is parallel to the lamp shaft that is the center line of the lamp 2 on the side opposite to the light guide plate 1 of the first reflecting portion 9 and the surface of the conductive plate 1. A slit 9b communicating with the side opposite to the light guide plate 1 is provided in the plane formed by the center line in the direction. That is, the slit 9
b is a center line of the fluorescent lamp 2 which is the center line of the fluorescent lamp 2 and the center of the conductive plate 1 in the plate thickness direction. It is provided so as to be located in the same plane as the line.

The second reflecting portion 10 is disposed on the body 7 side of the cover 8 facing the display panel 8b, is located on the opposite side of the first reflecting plate 9 from the conductive plate 1, and has a slit 9b. The light which is arranged at a predetermined angle θ with respect to the line connecting the lamp axis of the fluorescent lamp 2 and the center line of the conductive plate 1 in the plate thickness direction, and which reaches the fluorescent lamp 2 through the slit 9b is displayed on the display panel. It is configured to reflect on 8b.

With this configuration, in the illumination device of this embodiment, the first reflecting portion 9 reflects most of the light of the lamp 2 to the light guide plate 1 side, and the slit 9b emits light. Since only a part of the light is transmitted and the part of the light is reflected by the second reflecting portion 10 and guided to the display panel 8b, a large amount of light can be guided to the translucent window 8a via the light guide plate 1. The transparent window 8a and the display panel 8b can have substantially the same brightness. Further, the slit 9b is provided at a position in the first reflecting portion 9 where the light from the lamp 2 is less likely to be reflected to the light guide plate 1 side, and the amount of light reflected from the first reflecting portion 9 to the light guide plate 1 side. Is less likely to be affected and the efficiency of the device is not reduced.

FIG. 8 shows a sixth embodiment of the illumination device of the present invention. The difference from the fifth embodiment is that the second reflecting portion 10 and the first reflecting portion 9 are different from each other. The point is that the slit 9b is connected to the end portion of the slit 9b, and the other points are the same as those in the fifth embodiment.

That is, the slit 9b of the first reflecting portion 9
Is formed by cutting and raising a part of the reflecting portion 9,
The cut-and-raised piece forms a second reflecting portion 10 at a predetermined angle θ with respect to the line connecting the lamp axis of the fluorescent lamp 2 and the center line of the conductive plate 1 in the plate thickness direction. Then, the light emitted from the fluorescent lamp 2 toward the slit 9b and reaching the second reflecting portion 10 is configured to be reflected by the display panel 8b. Even with this configuration, the fifth
The same effect as that of the above embodiment is obtained.

In this embodiment, the second reflecting portion 10 may be movable so that the width of the slit 9b can be adjusted. In this case, in addition to the above effects, The slit 9 is formed by rotating the second reflecting portion 10.
It is also possible to close b and prevent light from being emitted to the display panel 8b side.

In the fifth and sixth embodiments, the first reflecting portion 9 is formed separately from the case 5, but as shown in the first to fourth embodiments. It may be formed integrally with the case. Further, in each of the above-described embodiments, the first unit provided integrally with the case 5
It is needless to say that the reflection part 9 and the second reflection part 10 may be formed integrally, or may be fixed by, for example, adhesion after molding.

[0051]

Since the present invention is configured as described above, in the invention according to claim 1, the first reflecting portion for reflecting the light from the lamp to the end portion side of the light guide plate, Since it is formed integrally with the case and it is not necessary to attach it to the light guide plate, at the time of assembly, after storing the light guide plate in the body, store the electrically connected lamp and lighting device in the body. It suffices to attach the cover, and thus the workability of assembly is improved.

According to the invention of claim 2, in addition to the effect of the invention of claim 1, the surface of the first reflecting portion arranged in the vicinity of the lamp is a mirror surface and is high. Since it has a reflectance, the light from the lamp is effectively reflected to the end portion of the light guide plate, and the efficiency of the fixture is not reduced. Moreover, since the first reflecting portion is made of metal, the first reflecting portion is It acts as a close conductor and improves the startability of the lamp.

Further, in the invention according to claim 3, in addition to the effect of the invention according to claim 1 or 2, in addition to the effect of the invention according to claim 1 or 2, the wiring insertion hole provided in the first reflecting portion is the lighting device. The wiring that connects the and lamps is held, and the force due to vibration or shock is less likely to be applied to the connection part of the wiring, and vibration resistance and shock resistance are improved.

Further, in the invention described in claim 4, in addition to the effect of the invention described in one of claims 1 to 3, the first reflecting portion is provided with the light of the lamp. Most of the light is reflected to the light guide plate side, and only a part of the light passes through the slit. The part of the light is reflected by the second reflecting portion and guided to the display panel, so that a large amount of light is emitted. Is guided to the translucent window via the light guide plate so that the translucent window and the display panel can have substantially the same brightness.

According to the invention of claim 5, in addition to the effect of the invention of claim 4, the slit is located at a position in the first reflecting portion where light from the lamp is less likely to be reflected to the light guide plate side. It is difficult to affect the amount of light reflected from the first reflecting portion to the light guide plate side, and the efficiency of the device is less likely to decrease.

[Brief description of drawings]

FIG. 1 is a partial cross-sectional side view showing a main part of a first embodiment of an illumination device of the present invention.

FIG. 2 is a partial cross-sectional side view showing a main part of a second embodiment of the illumination device of the present invention.

FIG. 3 is a partial cross-sectional plan view of the main part of the above.

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

FIG. 5 is a partial cross-sectional side view showing a main part of a fourth embodiment of the illumination device of the present invention.

FIG. 6 is a partial cross-sectional plan view of the main part of the above.

FIG. 7 is a partial cross-sectional side view showing a main part of a fifth embodiment of the illumination device of the present invention.

FIG. 8 is a partial cross-sectional side view showing a main part of a sixth embodiment of the illumination device of the present invention.

FIG. 9 is a partial cross-sectional side view showing a main part of a conventional illumination device (first conventional example).

FIG. 10 is a plan view showing another conventional illumination device (second conventional example).

FIG. 11 is a partial cross-sectional side view showing the main part of the above.

FIG. 12 is another conventional illumination device (third conventional example).
It is a partial cross-sectional side view showing.

[Explanation of symbols]

 1 light guide plate 2 lamp 4 lighting device 5 case 6 wiring 7 body 8 cover 8a translucent window 8b display panel 9 first reflecting portion 9a wiring insertion hole 9b slit 10 second reflecting portion

Claims (5)

[Claims] 1. A flat light guide plate, a lamp arranged to face an end of the light guide plate, and a lighting device for lighting the lamp are formed on a front surface side by a diffusive member. An illuminating device in which a light guide plate is housed in a case including a cover having a light transmitting window and a body to which the cover is attached so that the light guide plate faces the light transmitting window. An illuminating device characterized in that a first reflecting portion for reflecting light from the lamp to the end portion side of the light guide plate is formed integrally with the case on the side. 2. The illumination device according to claim 1, wherein at least the surface of the first reflecting portion on the light guide plate side is mirror-finished with a metal member. 3. The illumination device according to claim 1, wherein the first reflecting portion is provided with a wiring insertion hole through which a wiring connecting the lighting device and the lamp is inserted. 4. The display panel, which is formed of a translucent member at a predetermined distance from the translucent window, is provided on the cover, and the lamp side is provided substantially in the center of the first reflecting portion in a side view. A slit communicating with the side opposite to the light guide plate is provided, and light passing through the slit is reflected to the display panel side between the first reflecting portion and the side of the case opposite to the side where the light guide plate is provided. An illuminating device according to one of claims 1 to 3, wherein a second reflecting portion is formed. 5. The slit is formed so that a centerline of the slit and the lamp in a side view and a center line in a direction parallel to the surface of the conductive plate are located on substantially the same straight line. Item 4. The illumination device according to item 4.