JPH10173239A - Light emitting diode device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To easily obtain a light emitting diode device which emits a desired monochromatic light taking advantage of an existing light emitting diode. SOLUTION: A blue light emitting diode 1 is equipped with one electrode connected to a first parabolic electrode terminal 2 and the other electrode connected to a second electrode terminal 3 through the intermediary of a bonding wire 4. The light emitting diode 1, the first electrode terminal 2, the second electrode terminal 3, and the bonding wire 4 are sealed up in a dome- shaped lens 7A which domes in the direction in which the diode 1 emits a light beam. The lens 7A is made of epoxy resin as main material, where green coloring agent of organic solvent which dyes epoxy resin in green as light of target wavelengths or turns it opaque is added to epoxy resin.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a light emitting diode device (LE) used for illumination, a display device and the like.
More particularly, the present invention relates to a light-emitting diode device capable of easily obtaining a desired spectrum.

[0002]

2. Description of the Related Art Conventionally, a light-emitting diode device having a light-emitting diode element that emits red, blue, yellow-green or blue-green light has been known, and is widely used for applications such as illumination and display devices. . Here, since the light emitting diode element generally has a narrow emission wavelength band, it is common sense to use the light emitting diode elements as single color light emitting diode devices. Further, a coloring agent may be added to the lens portion of the light emitting diode device or a colored cap may be provided for the purpose of correcting the emission color or for suppressing a specific wavelength component.

Recently, for example, seven colors (red, green, blue,
There is an increasing need for more monochromatic light, such as yellow / light blue / purple / white) or more.

[0004]

In order to meet the above-mentioned needs, it is necessary to manufacture light-emitting diode elements that emit monochromatic light for each required color. For example, like pure green, by the light emitting diode element itself,
Some colors are difficult to develop, and it is said that it is difficult to obtain a light emitting diode element that emits pure green by slightly changing the current manufacturing technology of green light emitting diode elements.

In the method of obtaining light of a required color from the monochromatic light emitted from the light emitting diode element itself, there are many colors that cannot be generated by existing light emitting diode elements.
There is a problem that the manufacturing process of the light-emitting diode device mounted on the light-emitting diode device must be largely reconsidered, and a great deal of cost, equipment and labor must be invested.

SUMMARY OF THE INVENTION In view of the above problems, an object of the present invention is to make it possible to easily obtain a light emitting diode device that emits desired monochromatic light by using existing light emitting diode elements.

[0007]

According to a first aspect of the present invention, a light emitting diode device includes a light emitting diode device that emits light having a wavelength including a target wavelength that is a desired wavelength, and a light emitting diode device. An electrode terminal that is electrically connected, and seals the light emitting diode element, and includes a sealing body that transmits light emitted by the light emitting diode element to the outside, wherein the sealing body A coloring agent containing a color component corresponding to the target wavelength is added.

According to the first aspect of the present invention, since the coloring agent containing the color component corresponding to the target wavelength is added to the sealing body for sealing the light emitting diode element, the color by the coloring agent added from outside is added. It appears to emit light at the wavelength of the component.

According to a second aspect of the present invention, in addition to the first aspect, a configuration in which the coloring agent is added to the entirety of the sealing body is added.

According to a third aspect of the present invention, in addition to the configuration of the first aspect, a configuration in which the light emitting diode element emits blue light is added.

According to a fourth aspect of the present invention, in addition to the third aspect, a configuration in which the target wavelength is a green wavelength is added.

According to a fifth aspect of the present invention, there is provided a light emitting diode device comprising: a light emitting diode device for emitting light having a wavelength including a target wavelength which is a desired wavelength; and a light emitting diode device electrically connected to the light emitting diode device. A terminal for an electrode, a transparent or translucent sealing body sealing the light emitting diode element, and the object of light emitted by the light emitting diode element, which is provided integrally with the sealing body. And a light transmitting member that transmits only light of a wavelength.

According to the fifth aspect of the present invention, since a light transmitting member which is provided integrally with the sealing body and transmits only light having a target wavelength out of the light emitted from the light emitting diode element is provided, light is transmitted from the outside. It appears to emit light at the wavelength of the color transmitted through the member.

According to a sixth aspect of the present invention, in addition to the configuration of the fifth aspect, a configuration in which the light emitting diode element emits blue light is added.

According to a seventh aspect of the present invention, in addition to the configuration of the sixth aspect, a configuration in which the target wavelength is a green wavelength is added.

According to an eighth aspect of the present invention, in addition to the configuration of the fifth aspect, a configuration in which the sealing body is a lens is added.

In a ninth aspect of the present invention, in the configuration of the fifth aspect, the light transmitting member is provided so as to cover the sealing body, and only the light having the target wavelength out of the light emitted by the light emitting diode element is provided. This is to add a configuration that is an optical filter that transmits light.

According to a tenth aspect of the present invention, in the configuration of the fifth aspect,
The light transmitting member has a configuration in which a coloring agent corresponding to the target wavelength is added.

According to an eleventh aspect of the present invention, in addition to the configuration of the tenth aspect, a configuration in which the coloring agent is added to the entire light transmitting member is added.

[0020]

BEST MODE FOR CARRYING OUT THE INVENTION

(First Embodiment) A first embodiment of the present invention will be described with reference to the drawings.

FIG. 1 is a perspective view of a light emitting diode device according to a first embodiment of the present invention. As shown in FIG. 1, the light emitting diode device includes a blue light emitting diode element 1. The light emitting diode element 1 has one electrode connected to a parabolic first electrode terminal 2 and the other electrode connected to a second electrode terminal 3 via a bonding wire 4. Light-emitting diode element 1, first electrode terminal 2, second electrode terminal 3, and bonding wire 4
Are sealed by a lens 7A as a sealing body having a convex portion in the light emitting direction of the light emitting diode element 1.

The lens 7A is made of an epoxy resin as a main material, and an organic solvent-based coloring agent for coloring or translucent to a target wavelength of green is added to the epoxy resin. The hatching with a broken line on the lens 7A shown in FIG. 1 indicates that the lens 7A is colored.

Here, the target wavelength refers to the wavelength of light that the light emitting diode device wants to emit. In this embodiment, a pure green wavelength for which monochromatic emission is difficult is selected as the target wavelength, and a blue light emitting diode element is selected as the light emitting diode element 1 that emits light including the target wavelength.

Note that the target wavelength is not limited to the green wavelength, but may be another color.
What is necessary is just to select from the element which emits light of the wavelength containing the selected target wavelength.

Hereinafter, a method for manufacturing the light emitting diode device configured as described above will be described with reference to the drawings.

FIG. 2 is a flowchart showing a method of manufacturing the light emitting diode device according to the first embodiment of the present invention. As shown in FIG. 2, first, in a compounding step ST1, an organic solvent-based coloring agent is mixed with a lens forming material made of an epoxy resin to form a mixture. The green coloring agent is added for coloring or translucent the lens-forming material to green at a target wavelength, and a water-insoluble organic solvent (dye solution) or the like is suitable as the coloring agent.

In the connection step ST2, a substrate for forming electrode terminals, a blue light emitting diode element 1 and a bonding wire 4 are prepared. The light emitting diode element 1 is mounted on the first electrode terminal 2 of the formation substrate, and one electrode (not shown) of the light emitting diode element 1 is connected to the first electrode terminal 2.
Is electrically connected to the electrode terminal 2. Further, the second electrode terminal 3 and the other electrode (not shown) of the light emitting diode element 1 are electrically connected by using a bonding wire 4.

Next, in the lens part forming step ST3,
Using the mixture prepared in the preparation step ST1, the light emitting diode element 1, the first electrode terminal 2, the second electrode terminal 3, and the bonding wire 4 are sealed together, and the light emitting direction of the light emitting diode element element 1 is changed. Lens 7 having convex portion
Form and cure A.

Next, in the electrode terminal processing step ST4, the first electrode terminal 2 and the second electrode terminal 3 extending in the anti-light emitting direction from the lens 7A are processed to obtain a light emitting diode device.

In this embodiment, the lens 7A
Although the green coloring agent is mixed so as to be uniform over the entire surface and the entire lens 7A is colored, only the outer edge of the lens 7A may be colored.

As described above, according to the present embodiment, since the lens 7A emits green light of the target wavelength, when the blue light emitting diode element 1 is operated, the light emitted from the light emitting diode element 1 passes through the lens 7A. When transmitted, it is colored green, and the same effect as emitting green light can be obtained. Therefore, since the existing light emitting diode element can be used, it is not necessary to largely change the process and equipment for manufacturing the light emitting diode element, and it is possible to easily and inexpensively realize the light emitting diode device that emits the target wavelength.

The lens 7A is formed so as to have a convex portion in the light emitting direction. However, the shape is not limited to this. It goes without saying that the effect can be obtained.

(Second Embodiment) Hereinafter, a second embodiment of the present invention will be described with reference to the drawings.

FIG. 3 is an exploded perspective view of a light emitting diode device according to a second embodiment of the present invention, showing a state before a sealing body is covered with a light transmitting member. In FIG. 3, the same members as those shown in FIG. As shown in FIG. 3, a cap 8 as a light-transmitting member that has a convex portion in the light emission direction and is colored or translucent to a target wavelength green or green on a lens 7B as a transparent or translucent sealing body. To form a light emitting diode device that emits a target wavelength. Here, hatching with a broken line on the cap 8 shown in FIG. 3 indicates that the cap 8 is colored.

Hereinafter, a method for manufacturing the light emitting diode device configured as described above will be described with reference to the drawings.

FIG. 4 is a flowchart showing a method for manufacturing a light emitting diode device according to a second embodiment of the present invention. As shown in FIG. 4, first, in a compounding step ST11, a lens-forming material made of an epoxy resin is compounded to generate a compound. It should be noted that an appropriate coloring agent may be mixed with the composition so that the transmitted light of the optical filter described later can be adjusted.

In the connection step ST12, a substrate for forming electrode terminals, a blue light emitting diode element 1 and a bonding wire 4 are prepared. The light emitting diode element 1 is placed on the first electrode terminal 2 of the formation substrate,
One electrode (not shown) of the light emitting diode element 1 is electrically connected to the first electrode terminal 2. Further, the second electrode terminal 3 and the other electrode (not shown) of the light emitting diode element 1 are electrically connected by using a bonding wire 4.

In the filter forming step ST13, a cylindrical cap 8 that transmits only green light of a target wavelength and has a convex top in the light emitting direction of the light emitting diode element 1 is formed. The cap 8 is made of a chemically deposited cadmium sulfide film and functions as an optical filter having a relative sensitivity of 100% at a light wavelength of 510 nm and a relative sensitivity of 50% between 480 nm and 510 nm.

Next, in the lens part forming step ST14, the light emitting diode element 1, the first electrode terminal 2, the second electrode terminal 3 and the bonding wire 4 are formed using the compound prepared in the compounding step ST11. Sealed together,
A lens 7B having a convex portion that can be fitted to the cap 8 in the light emitting direction of the light emitting diode element 1 is formed and cured.
Thereafter, the cap 8 is fitted from the light emitting direction of the lens 7B to form a lens portion.

Next, in the electrode terminal processing step ST15, the first electrode terminal 2 and the second electrode terminal 3 extending in the anti-light emission direction from the lens 7B are processed to obtain a light emitting diode device.

Hereinafter, the apparent luminescent color will be described with reference to FIG.

FIG. 5 is a correlation diagram between the light emission wavelength of the light emitting diode element and the brightness. Generally, as shown in FIG.
Many elements have a narrow emission wavelength band, such as a yellow-green diode element shown by a curve C and a red diode element shown by a curve D. This is as described in the related art.

However, some diode elements have a wide emission wavelength band. As an example, there is a blue light emitting diode element shown by a curve A, and a green wavelength which is a target wavelength is also included in the emission wavelength band A. Therefore, in this embodiment, a blue light emitting diode element is used.

As described in the first and second embodiments, the wavelength of light passing through the lenses 7A and 7B is limited by coloring the lens or attaching the cap 8 as an optical filter. This allows only light in the wavelength band corresponding to the curve B of the target wavelength to pass out of all the light emission wavelengths shown by the curve A, and apparently allows the light emitting diode device to emit light of the target wavelength.

Here, since the blue-based diode element 1 itself is an existing diode element, it is possible to easily and inexpensively obtain light of a target wavelength without changing a process or equipment for manufacturing a light-emitting diode element. Can be.

Hereinafter, the change in apparent light emission color of the light emitting diode device will be described with reference to a chromaticity diagram.

FIG. 6 is a chromaticity diagram with wavelength as the horizontal axis and brightness as the vertical axis. In the chromaticity diagram, all colors can be displayed by a region surrounded by a cloud-shaped curve, and the color is specified by coordinates of an intersection of a vertical axis and a horizontal axis.

As shown in FIG. 6, the point C is a white coordinate, and a diagonally upper left portion thereof indicates a green region and a diagonally lower left portion thereof indicates a blue region. The coordinate of the point B is the original color of the blue light emitting diode element 1 (the peak of the curve A in FIG. 5).

For example, as in the first embodiment, when forming the lens 7A, by increasing the ratio of adding the green coloring agent and changing the transmission wavelength, the coordinate position can be changed from point B to point P1, point P1. From the target wavelength to the point P2 to the green side of the target wavelength. Even when the wavelength band of light transmitted by the cap 8 is limited as in the second embodiment, the light can be similarly moved to the green side of the target wavelength.

Further, by changing the colorant shown in the first embodiment and the cap 8 as an optical filter shown in the second embodiment according to the target wavelength, the target wavelength can be changed from blue to orange. Can be changed over a wide band. As a result, it is possible to easily obtain a light emitting diode device that apparently emits a desired emission color from a band included in the wavelength band of light emitted by the existing light emitting diode.

[0051]

According to the light emitting diode device according to the first aspect of the present invention, since it appears that light is emitted at the wavelength of the color component due to the added coloring agent, the color of the lightest wavelength by the light emitting diode element itself, that is, Thus, light of a color other than the color conventionally used as a single color can be obtained.
As a result, the existing light emitting diode device having a wide light emitting wavelength band can be used, so that it is not necessary to significantly change the process and equipment for manufacturing the light emitting diode device, so that the light emitting diode device that emits the target wavelength easily and inexpensively. Can be obtained.

According to the light emitting diode device according to the second aspect of the present invention, since the coloring agent is added to the entirety of the sealing body, it is possible to obtain a light emitting diode device that emits light of a target wavelength without fail.

According to the light emitting diode device according to the third or sixth aspect of the present invention, since the light emitting diode element emits blue light, the target wavelength can be selected because the blue light has a wide emission wavelength band. More types of colors.

According to the light emitting diode device according to the fourth or seventh aspect of the present invention, since the target wavelength is a green wavelength, the green wavelength is included in the wavelength of blue light, so that a pure monochromatic light is emitted. It is possible to reliably obtain green light that is difficult to perform.

According to the light emitting diode device according to the fifth aspect of the present invention, since it appears that light is emitted at the wavelength of the color transmitted through the light transmitting member, colors other than the color used as a single color of the light emitting diode element itself are used. Light can be obtained.
As a result, since the existing light emitting diode element having a wide light emitting wavelength band can be used, it is not necessary to significantly change the process and equipment for manufacturing the light emitting diode element, and therefore, the light emitting diode device that emits the target wavelength easily and inexpensively. Can be obtained.

According to the light emitting diode device according to the eighth aspect of the present invention, since the sealing body is a lens, a light emitting diode device that reliably emits light can be obtained.

According to the light emitting diode device of the ninth aspect, the light transmitting member is an optical filter that transmits only the light of the target wavelength out of the light emitted by the light emitting diode element. A diode device can be reliably obtained.

According to the tenth aspect of the present invention, since the coloring material corresponding to the target wavelength is added to the light transmitting member, it is possible to reliably obtain the light emitting diode device emitting desired light. .

According to the eleventh aspect of the present invention, since the coloring agent is added to the entire light transmitting member, it is possible to more reliably obtain the light emitting diode device which emits light of the target wavelength.

[Brief description of the drawings]

FIG. 1 is a perspective view of a light emitting diode device according to a first embodiment of the present invention.

FIG. 2 is a flowchart illustrating a method for manufacturing the light emitting diode device according to the first embodiment of the present invention.

FIG. 3 is an exploded perspective view of a light emitting diode device according to a second embodiment of the present invention.

FIG. 4 is a flowchart illustrating a method for manufacturing a light emitting diode device according to a second embodiment of the present invention.

FIG. 5 is a graph showing a correlation between a light emission wavelength of a light emitting diode element and brightness.

FIG. 6 is a chromaticity diagram showing a change in emission color of a light emitting diode element.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 light emitting diode element 2 first electrode terminal 3 second electrode terminal 4 bonding wire 7A lens (sealing body) 7B lens (sealing body) 8 cap (light transmitting member) ST1 compounding step ST2 connecting step ST3 lens Part forming step ST4 Electrode terminal processing step ST11 Mixing step ST12 Connecting step ST13 Filter forming step ST14 Lens part forming step ST15 Electrode terminal processing step

Claims (11)

[Claims] 1. A light emitting diode element that emits light having a wavelength including a target wavelength that is a desired wavelength; an electrode terminal electrically connected to the light emitting diode element; and a light emitting diode element sealed. And a sealing body that transmits light emitted by the light emitting diode element to the outside, wherein a coloring agent containing a color component corresponding to the target wavelength is added to the sealing body. Light emitting diode device. 2. The light emitting diode device according to claim 1, wherein the coloring agent is added to the whole of the sealing body. 3. The light emitting diode device according to claim 1, wherein the light emitting diode element emits blue light. 4. The light emitting diode device according to claim 3, wherein the target wavelength is a green wavelength. 5. A light emitting diode element that emits light having a wavelength including a target wavelength that is a desired wavelength, an electrode terminal electrically connected to the light emitting diode element, and sealing the light emitting diode element. Transparent or translucent sealing body, and a light transmitting member that is provided integrally with the sealing body and that transmits only light of the target wavelength of light emitted by the light emitting diode element. A light emitting diode device characterized by the above-mentioned. 6. The light emitting diode device according to claim 5, wherein the light emitting diode element emits blue light. 7. The light emitting diode device according to claim 6, wherein the target wavelength is a green wavelength. 8. The light emitting diode device according to claim 5, wherein the sealing body is a lens. 9. The optical filter according to claim 1, wherein the light transmitting member is an optical filter that is provided so as to cover the sealing body and transmits only light having the target wavelength out of the light emitted from the light emitting diode element. The light emitting diode device according to claim 5. 10. The light emitting diode device according to claim 5, wherein a coloring agent containing a color component corresponding to the target wavelength is added to the light transmitting member. 11. The light emitting diode device according to claim 10, wherein the coloring agent is added over the entire light transmitting member.