JPH10282915A - Led ball for display device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To greatly improve the visibility. SOLUTION: The LED ball which is used as the light emission source of a display device is constituted. A light emission unit main body 3a constituted by mounting light emitting diode elements 4 in plane and a diffusion material containing dome-shaped cap member 6 mounted around the light emission diode elements 4 of the light emission unit main body 3a are provided. In this case, the light emitted by the light emitting diode elements 3 is diffused in various directions by diffusing materials in the dome-shaped cap member 6 and then the dome-shaped cap member 6 constitute a three-dimensional light emission surface on the whole. Consequently, the LED ball 3 has no blind zone and the visibility is greatly improved.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

[0001] 1. Field of the Invention [0002] The present invention relates to an LED bulb used as a light source of a display device.

[0002]

2. Description of the Related Art In a display device having one or more display devices arranged in a plane, a so-called LED bulb has been proposed as a light source.
As shown in FIG. 5, a conventional LED bulb 40 is configured by mounting a plurality of light emitting diode elements 41 on an upper surface of a light emitting device main body 40a in a planar shape. Around the LED bulb 40,
A lens 51 having a substantially spherical shell shape is provided.
One display 50 is constituted by the D sphere 40 and the lens 51.

[0003] In the display device 50 configured as described above, while the LED bulb 40 is lit, the light emitting diode element 4
As a result of the light emitted from 1 being reflected by the lens 51, a blind spot where no light is emitted outside the lens 51 occurs as shown by the angle α in FIG. That is, when the display 50 is viewed from the range of the blind spot portion α, the LED bulb 40 appears to be turned off. As described above, in the conventional display using the LED bulb, the visibility of the LED bulb is not so good because the LED bulb is turned on or off depending on the viewing angle.

The present invention has been made to solve such a conventional problem, and an object of the present invention is to provide an LED bulb for a display device which can greatly improve visibility.

[0005]

According to a first aspect of the present invention, there is provided an LED bulb for a display device, wherein a light emitting diode element is mounted in a plane and a light emitting diode element is provided around the light emitting diode element. And a dome-shaped cap member containing a diffusing material, which is mounted on the base member.

According to a second aspect of the present invention, in the LED bulb for a display device according to the first aspect, the diffusing material is a ceramic powder.

According to the present invention, the light emitted from the light emitting diode element enters the dome-shaped cap member and is diffused in various directions by the diffusion material inside the dome-shaped cap member. As a result, the entire dome-shaped cap member becomes a light emitting surface, and the light emitting surface of the LED bulb is three-dimensionally configured. This allows
When the LED ball is viewed through the lens of the display device, the dead area of the LED ball that is turned on is eliminated, and the lighting state of the LED ball can be checked from all directions, thereby greatly improving visibility. it can.

[0008]

Embodiments of the present invention will be described below with reference to the accompanying drawings. FIG. 1 is a longitudinal sectional view of a display device having an LED bulb according to an embodiment of the present invention, and FIG.
FIG. 3 is a sectional view taken along line III-III of FIG. 2, and FIG. 4 is a view for explaining the operation and effect of this embodiment.
Here, a display device including one display device is taken as an example.

As shown in FIG. 1, the display 1 includes a lens 2 having a substantially spherical shell shape, and an LED bulb 3 disposed therein. As shown in FIGS. 2 and 3, a plurality of light emitting diode elements 4 are mounted on the light emitting device main body 3 a of the LED bulb 3 in a planar shape, and each light emitting diode element 4 is sealed with a transparent molding resin 5. ing. Note that the number of the light emitting diode elements 4 may be one.

On the upper part of the light emitting device body 3a of the LED bulb 3,
A resin cap member 6 formed in a dome shape (hemispherical shell shape) is attached (see FIGS. 1 and 2). The center of curvature of the cap member 6 is preferably located on the mounting surface of the light emitting diode element 4.

The inside of the cap member 6 is doped with a diffusion material. As this diffusing material, for example, ceramic powder is used, but the application of the present embodiment is not limited to this, and any inorganic material other than ceramic powder may be used as long as it has a property of diffusing light. Further, an organic material may be used.

Next, the operation and effect of this embodiment will be described with reference to FIG.
This will be described with reference to FIG. Light L emitted from light emitting diode element 4
Enters the dome-shaped cap member 6. The light incident on the dome-shaped cap member 6 is incident on a number of diffuser particles 7 doped in the cap member 6 and is diffused in various directions by the surface of the diffuser particles 7.

As a result, the entire dome-shaped cap member 6 becomes a light emitting surface (see FIG. 1), and the light emitting surface of the LED bulb 3 is three-dimensionally configured. Thereby, when the LED bulb 3 is viewed through the lens 2 of the display 1, there is no blind spot of the lit LED bulb 3, and the lighting state of the LED bulb 3 can be confirmed from all directions. Thereby, the visibility can be greatly improved.

Moreover, since the LED bulb 3 according to the present embodiment is constituted by simply mounting the easily formed dome-shaped cap member 6 on the conventional LED bulb, the cost is only slightly increased.

In the above embodiment, the display device is constituted by one display device 1 as an example. However, the present invention provides a display device comprising a plurality of display devices 1 arranged in a plane. (For example, an advertising panel).

[0016]

As described above, the display device L according to the present invention is used.
According to the ED sphere, a dome-shaped cap member containing a diffusing material is attached to the light emitting device body in which the light emitting diode elements are mounted in a planar shape, so that the blind spot portion of the LED sphere is eliminated, and the LED is mounted in all directions. The lighting state of the sphere can be checked, and this has the effect of greatly improving visibility.

[Brief description of the drawings]

FIG. 1 is a schematic vertical cross-sectional view of a display device provided with an LED bulb according to an embodiment of the present invention.

FIG. 2 is a schematic configuration diagram of a longitudinal section of an LED bulb according to an embodiment of the present invention.

FIG. 3 is a sectional view taken along the line III-III of FIG. 2;

FIG. 4 is a view for explaining the operation and effect of the embodiment.

FIG. 5 is a schematic cross-sectional configuration diagram of a conventional display device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Display (display apparatus) 2 Lens 3 LED ball 3a Light emitting device main body 4 Light emitting diode element 6 Dome-shaped cap member 7 Particles of diffusing material

Claims (2)

[Claims] 1. An LE used as a light emitting source of a display device
A D-sphere, a light-emitting device body in which a light-emitting diode element is mounted in a plane, a dome-shaped cap member containing a diffusing material, which is mounted around the light-emitting diode element in the light-emitting device body;
LED sphere for display device provided with. 2. The LED bulb for a display device according to claim 1, wherein the diffusion material is a ceramic powder.