JPH0715045A - Surface light emission illuminating equipment - Google Patents

Abstract

PURPOSE:To improve the brightness of a light emission surface, facilitate assembling work, and enable changing light emission color, by constituting an equipment of LED's, two or more flames for supplying electric power to the LED's, a mold member whose section is U-shaped, and a transparent or semitransparent display panel. CONSTITUTION:Two frames 1, 2 composed of conductive material like copper are arranged parallel with each other, and LED's 3 are arranged in recessed parts 1a in the frame 1. The uppermost layers of the LED's 3 are connected with protruding parts 2a of the frame 2 by using bonding wires 4. While keeping parallelism, the frames 1, 2 are molded by a molding member 5 whose lateral section is U-shaped. The molding member 5 is clamped and fixed by a transparent or semitransparent display panel made of acryl. When a DC voltage is applied to the LED's 3, they emit light, and the whole surface of the display panel turns to the state of light emission. Thereby assembling work is facilitated, disassembling and reassembling are enabled, and the light emission color can be changed.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention
The present invention relates to a surface emitting lighting device that is widely used for frequency display of car radios, guide display of cameras, and the like.

[0002]

2. Description of the Related Art Recently, various devices such as measuring devices, car radios, cameras, etc. have tended to be miniaturized and thinned, and it is required that a display device to be incorporated be thin. On the other hand, although an LCD is often used for a display device in order to save power, the LCD is not so good in visibility with reflected light, so a backlight is often used together.

For this type of backlight, a structure in which LEDs are arranged on the side surface of a diffusion plate is suitable for thinning. Such a surface emitting lighting device in which LEDs are arranged on the side surface of the diffusion plate is disclosed in Japanese Patent Application Laid-Open No. 1-287656.

[0004]

However, in the surface emitting lighting device in which the LED is arranged on the side surface of the conventionally known diffuser plate, the diffuser plate and the LED are separated and assembled, so that a skill is required for the assembling work. In addition, since the light emitted from the LEDs leaks, only the dark surface emitting lighting device can be obtained even with the same LED.

Further, there is a problem in that once assembled, it cannot be disassembled and therefore the emission color cannot be changed.

The present invention has been made in view of the above-mentioned problems, and is easy to assemble, is bright because light does not leak, and can be disassembled and reassembled, so that the emission color can be changed. It is an object of the present invention to provide a surface-emitting lighting device capable of

[0007]

In order to achieve this object, the surface emitting lighting device of the present invention comprises an LED, two or more frames for supplying electric power to the LED, and one frame formed by molding. It is configured so as to include a mold member having a U-shaped cross section to be fixed so as to be transparent, and a transparent or translucent display plate inserted into the mold member.

Further, it is preferable that the frame has two frames having convex portions and convex portions formed on each of the frames, the convex portions are alternately opposed to each other, and the frames are arranged in parallel. The LED is mounted on one of the convex portions, and the other convex portion of the frame is connected to the uppermost layer of the LED.

[0009]

In the surface emitting illuminator having the above-described structure, the frame is fixed by the mold member having a U-shaped cross section so that the frame can be integrated into one body, so that the assembling work can be easily performed with bare hands. Also,
The light emitting surface is bright because the mold member having a U-shaped cross section prevents the light emitted from the LED from leaking. Further, since no adhesive or the like is used and only it is inserted into the U-shaped section, it can be disassembled and reassembled after the assembly, whereby the emission color (LED) can be changed.

[0010]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a perspective view showing an embodiment of a surface emitting lighting device according to the present invention.

In FIG. 1, two frames 1 and 2 made of a conductive material such as copper are arranged in parallel so that the convex portions 1a and 2a formed on them are alternately opposed to each other. The LED 3 is mounted on the convex portion 1a of the frame 1, and the lowermost layer of the LED 3 is connected to the convex portion 1a by a conductive adhesive such as silver epoxy. Also LED
The uppermost layer of 3 is connected to the convex portion 2 a of the frame 2 by the bonding wire 4.

While the frames 1 and 2 remain parallel,
As shown in FIG. 2, it is molded by the molding member 5 so that the cross section is located at the bottom of the U-shape. After molding, the frames 1 and 2 are fixed so as to be one body, so that the frames 1 and 2 can be handled as one part. The mold member 5 is the LED 3
Since it has a role of reflecting the light emitted by the side toward the display plate 6 and a role of preventing the leakage of the light, it is preferable to use a material having a color having a large light reflectance such as white and having elasticity.

After that, as shown in FIG. 3, the portion of the mold member 5 having a U-shaped cross section is inserted into the display plate 6 for assembly work. The display plate 6 is a transparent or translucent acrylic plate. The assembling work for inserting the display plate 6 into the mold member 5 can be performed with bare hands, and since it is simply inserted without using an adhesive or the like, it may be disassembled and then reassembled again after assembly. It is possible.

FIG. 3 shows a state in which two mold members 5 are inserted in the upper and lower parts of the display plate 6. It should be noted that the mold member 5 can be inserted into the left and right positions of the display plate 6 instead of the upper and lower positions thereof, or can be inserted into the upper, lower, left and right 1 to 4 positions. Further, by arranging the plurality of molding members 5 in the lateral direction and connecting the adjacent frames 1 and 2 to each other, it is possible to cope with the case where the display plate 6 is much longer than the molding member 5.

In this state, a DC voltage is applied between the frame 1 and the frame 2 so that the frame 2 has a positive polarity. When a DC voltage is applied, the uppermost layer of the LED 3 emits light, and the light is emitted toward the display plate 6, and the entire surface of the display plate 6 emits light.

The present invention has been described above with reference to the embodiments.
Various modifications are possible according to the technical idea of the present invention. For example, in the above-described embodiment, the convex portions 1a and 2a formed respectively are alternately opposed to each other,
Two frames 1 and 2 are arranged in parallel and frame 1
LED3 is mounted on the convex portion 1a of the
The case where the LED and the uppermost layer of the LED 3 are connected has been described, but according to the technical idea of the present invention, the LED is mounted on one of the linear frames having no convex portion and the other frame is connected to the L frame.
It is also possible to connect to the uppermost layer of the ED.

Further, according to the technical idea of the present invention, it is also possible to make the cross section of the mold member 5 U-shaped.

[0019]

As described above, according to the surface emitting lighting device of the present invention, the frame is fixed by the mold member having a U-shaped cross section so that the frame can be integrated into one body, and the assembling work can be easily performed with bare hands. . Also, this mold member having a U-shaped cross section is LE
Since the light emitted from D is prevented from leaking, the light emitting surface is bright. Furthermore, since the adhesive or the like is not used and is simply fitted into the U-shaped section, it can be disassembled and reassembled after the assembly, whereby the emission color (LED) can be changed.

[Brief description of drawings]

FIG. 1 is a perspective view showing an embodiment of a surface emitting lighting device according to the present invention.

FIG. 2 is a perspective view showing an embodiment of a surface emitting lighting device according to the present invention.

FIG. 3 is a perspective view showing an embodiment of a surface emitting lighting device according to the present invention.

[Explanation of symbols]

 1 frame 1a convex part 2 frame 2a convex part 3 LED 4 bonding wire 5 mold member 6 display board

Claims (2)

[Claims] 1. An LED, two or more frames for supplying electric power to the LEDs, and a U-shaped or U-shaped cross section for fixing the frames by molding to form one body.
A surface-emitting lighting device comprising a character-shaped mold member and a transparent or translucent display plate inserted into the mold member. 2. A frame comprising two frames having convex portions and convex portions formed on each of the frames, the convex portions being alternately opposed to each other, and the frames being arranged in parallel with each other. Place the LED on one of the convex parts,
The surface emitting lighting device according to claim 1, wherein the other convex portion of the frame is connected to the uppermost layer of the LED.