JP2002223005A - Light emitting diode and display device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve contrast of the lighting time to the time when a light is put out, by reducing dark noise caused by reflection of an external light, in a light emitting diode and a display device. SOLUTION: In the light emitting diode 1, a tip of one lead 3a is made a recessed type reflecting mirror 3c, leads 3a, 3b are sealed with black epoxy resin 5, a light emitting element 2 is mounted on a bottom surface of the reflecting mirror 3c, the other lead 3b and the light emitting element 2 are bonded by using wire 4, the light emitting element 2, a reflecting surface of the reflecting mirror 3c, a tip of the other lead 3b and the wire 4 are sealed by using transparent epoxy resin 6, and a convex lens 7 having an elliptical form is molded. A greater part of tip parts of the leads 3a, 3b is sealed by using the black epoxy resin 5, and the whole lower surface of the transparent epoxy resin 6 is also covered with the black epoxy resin 5, so that the external light is not reflected by the leads 3a, 3b and the lower surface of the transparent epoxy resin 6, and the dark noise can be reduced remarkably.

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 (hereinafter abbreviated as "LED") in which a light emitting element and an electrical connection portion between the light emitting element and a lead are sealed with a material such as a light transmitting epoxy resin. ) And a display device using the LED. In this specification, the LED chip itself is called a “light emitting element”,
The entire light emitting device including the optical device such as a package resin or a lens system equipped with an LED chip is called a “light emitting diode”.
Alternatively, it is referred to as “LED”.

[0002]

2. Description of the Related Art Conventionally, display devices have been developed in which a large number of light-emitting diodes are arranged vertically and horizontally to display characters, images, and the like. As a surface mount type LED used in such a display device, there is an LED as shown in FIG. The LED 81 shown in FIG. 10 includes a pair of leads 83a and 83b for supplying power to the light emitting element 82, the tip of one of the leads 83a being a concave reflecting mirror 83c.
The light emitting element 82 is mounted on the bottom surface of the reflecting mirror 83c. Subsequently, after the light emitting element 82 and the other lead 83b are electrically connected by bonding with a wire 84,
These are sealed with a transparent epoxy resin 86, and a light emitting surface 87 having a convex lens shape is molded on the light emitting surface side of the light emitting element 82. Then, a pair of leads 83a, 83
The LED 81 is formed by bending b in a substantially U-shape along the side surface and the lower surface of the transparent epoxy resin 86.

[0003] Such a surface-mount type LED 81 has a feature that when used in a display device, the mounting density is high, the positional accuracy is good, and the external radiation efficiency is high.

[0004]

However, in the LED 81 having such a structure, external light such as sunlight is reflected by the leads 83a and 83b or the lens surface 87 or the lower surface of the transparent epoxy resin 86 when the LED 81 is turned off (in particular, the lead 81). 83
a, 83b are drawn out in the lateral direction with respect to the central radiation direction of the light emitting element 82, so that the leads 83a, 83b
Was remarkable. ), Causing false lighting (hereinafter,
This phenomenon is called “dark noise”. ), There is a problem that the contrast of the display device is deteriorated.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a light emitting diode and a display device capable of reducing dark noise due to reflection of external light and improving contrast between lighting and turning off.

[0006]

According to a first aspect of the present invention, there is provided a light emitting diode, a light emitting element, a lead for supplying power to the light emitting element, a light transmitting material, and a light absorbing element for preventing reflection of external light. The lead is drawn out in a lateral direction with respect to a central radiation direction of the light emitting element, and electrically connects the light emitting element and the light emitting element to the lead by the light transmissive material. While the site is sealed, a light emitting surface is formed on the light emitting surface side of the light emitting element, and the light absorbing material covers a part of the back side and side surfaces of the light emitting element of the light transmitting material. Is what it is.

In the light emitting diode of the present invention, the light emitting element and a portion for electrically connecting the light emitting element to the lead are sealed with a light transmitting material, and a light emitting surface is formed on the light emitting surface side of the light emitting element. You. Thereafter, the light-absorbing material covers the back surface and a part of the side surface of the light-emitting element made of the light-transmitting material.

In the light emitting diode having such a configuration,
First, because the light emitting element and the portion for electrically connecting the light emitting element to the lead are sealed with a light transmitting material,
Since the interface between the light-transmitting material and the light-absorbing material is not located along the lead, a product due to cracks at the interface between the light-transmitting material and the light-absorbing material due to the difference in thermal expansion coefficient with the lead Defects can be reduced, and the yield can be improved. And reflection of outside light in the lead drawn out in the side direction cannot be prevented,
Since the entire back surface of the light-emitting element made of the light-transmitting material is covered with the light-absorbing material, external light is not reflected on the back surface of the light-transmitting material, and dark noise can be significantly reduced. Here, a transparent epoxy resin or the like can be used as the light transmissive material, and when a transparent epoxy resin is used as the light transmissive material, a black epoxy resin is used as the light absorbing material to improve adhesion. It is preferably used.

In this manner, the light emitting diode can reduce the dark noise due to the reflection of the external light to improve the contrast between the light-on state and the light-off state, and can increase the yield.

According to a second aspect of the present invention, in the light emitting diode according to the first aspect, only the periphery of a portion where the light emitting element is electrically connected to the lead is sealed by the light transmitting material. The lead is sealed around a sealing portion of the lead by the light transmitting material.

In the light-emitting diode of the present invention, most of the lead drawn out in the lateral direction is sealed with the light-absorbing material except for the periphery of the portion where the light-emitting element is electrically connected to the lead. Subsequently, an electrical connection is made between the light emitting element and the lead, only the periphery of the electrical connection portion is sealed with a light transmitting material that is in close contact with the light absorbing material, and light is emitted to the light emitting surface side of the light emitting element. A surface is formed.

In the light emitting diode having such a configuration,
Most of the leads drawn out in the lateral direction are sealed with a light-absorbing material, and the entire back surface of the light-transmitting material is also covered with the light-absorbing material. External noise is not reflected, and dark noise can be greatly reduced.

[0013] In this manner, a light-emitting diode can be provided in which the dark noise due to the reflection of external light can be greatly reduced and the contrast between when the light is on and when the light is off can be improved.

According to a third aspect of the present invention, in the light emitting diode according to the first aspect of the present invention, the light emitting element and the portion for electrically connecting the light emitting element to the lead are provided inside the light transmitting material. A light absorbing member that covers most of the leads is provided.

In the light emitting diode having such a configuration,
First, because the light emitting element and the portion for electrically connecting the light emitting element to the lead are sealed with a light transmitting material,
Since the interface between the light-transmitting material and the light-absorbing material is not located along the lead, a product due to cracks at the interface between the light-transmitting material and the light-absorbing material due to the difference in thermal expansion coefficient with the lead Defects can be reduced, and the yield can be improved. A light-absorbing member is provided inside the light-transmitting material to cover most of the lead, and the entire rear surface of the light-transmitting material is also covered with the light-absorbing material. , No external light is reflected, and dark noise can be significantly reduced.

In this manner, a light emitting diode which can significantly reduce dark noise due to reflection of external light to improve the contrast at the time of lighting and at the time of turning off, and can increase the yield.

According to a fourth aspect of the present invention, in the light-emitting diode according to any one of the first to third aspects, the light-emitting surface is a convex lens that emits light emitted from the light-emitting element to the outside. Things.

Since the light emitting surface of the light emitting diode is formed as such a convex lens, the light emitted from the light emitting element is condensed and externally radiated. Will have.

In this way, the dark noise due to the reflection of external light can be reduced to improve the contrast between the light-on state and the light-off state, and the light-emitting diode can have better characteristics when it is used as a display device. .

According to a fifth aspect of the present invention, in the light emitting diode according to any one of the first to fourth aspects, a concave reflecting mirror is formed on the lead, and the light emitting element is provided on a bottom surface of the reflecting mirror. The one that is mounted.

In the light emitting diode having such a configuration,
Light emitted in a substantially horizontal direction from the light emitting surface of the light emitting element can also be reflected by the reflecting mirror and emitted from the light emitting surface, so that the external radiation efficiency can be improved and the luminance at the time of lighting can be further improved. Can be raised.

In this way, the light emitting diode can reduce the dark noise due to the reflection of external light and increase the external radiation efficiency, so that the contrast at the time of turning on and off can be further improved.

According to a sixth aspect of the present invention, in the light emitting diode according to any one of the first to fifth aspects, the lead is provided at a position lower than a height at which the light emitting element is mounted. It is derived from a conductive material.

Since a display device is often installed outdoors, in order to prevent corrosion of a lead portion that is drawn out, a large number of light emitting diodes are soldered to a mounting substrate, and then a black light emitting diode is provided between the light emitting diodes. Filling and curing the weather-resistant resin to cover the lead portion that is drawn out is performed. Here, the liquid surface of the black weather-resistant resin must be controlled to be lower than the upper end of the light-absorbing material on the outer periphery of the light emitting diode and higher than the lead portion from which the lead is drawn.

In the light emitting diode of the present invention, the lead is drawn out of the light absorbing material at a position lower than the height at which the light emitting element is mounted. The difference in height from the top of the material is large. This facilitates the liquid level control when filling the black weather resistant resin between the light emitting diodes.

In this manner, the dark noise due to the reflection of external light can be reduced to improve the contrast between the light-on state and the light-off state, and the light emitting diode can be manufactured more easily when it is used as a display device. .

According to a seventh aspect of the present invention, in the light-emitting diode according to any one of the first to sixth aspects, the light-emitting surface is provided around the light-emitting surface within a range that does not block normal optically-controlled radiation. A light shielding wall made of the light absorbing material is provided.

When a light emitting diode is densely mounted to form a display device, stray light emitted from the light emitting diode in the horizontal direction is not lit because the distance between the adjacent light emitting diodes is short. The phenomenon called so-called crosstalk, which is reflected on the light emitting surface of the light emitting diode and causes pseudo lighting, is likely to occur. Therefore, by providing a light-shielding wall made of a light-absorbing material around the light emitting surface within a range that does not block normal optically controlled emitted light, stray light is prevented from reaching the adjacent light emitting diode, and crosstalk is reduced. This can be prevented from occurring. In addition, the height of the upper end of the outer periphery of the light-absorbing material is increased, so that it is easy to control the liquid level when filling a black weather-resistant resin between the light-emitting diodes when forming a display device.

In this way, the dark noise due to the reflection of external light can be reduced to improve the contrast at the time of lighting and at the time of turning off the light, and crosstalk can be prevented when the display device is used. A light emitting diode that is easier to manufacture when used as a display device.

According to an eighth aspect of the present invention, in the light emitting diode according to any one of the first to seventh aspects, the lead is drawn out into a rectangular area circumscribing a package made of the light absorbing material. Is what it is.

When manufacturing the display device by arranging the light emitting diodes of the present invention vertically and horizontally, the leads are drawn out into a rectangular area circumscribing the package made of the light absorbing material, and thus the light emitting diodes are mounted in close contact with the surrounding light emitting diodes. Even if it does, it will not interfere with the leads of the surrounding light emitting diodes. Therefore, the mounting density can be increased to such an extent that adjacent light emitting diodes are in close contact with each other.

In this way, the light emitting diode which can reduce the dark noise due to the reflection of the external light to improve the contrast at the time of turning on and off, and can increase the mounting density when the display device is used. Become.

According to a ninth aspect of the present invention, in the light emitting diode according to any one of the first to eighth aspects, the light emitting diode is surface-mounted on a substrate.

This makes it possible to reduce the size of the light emitting diode and to increase the mounting density to such an extent that the adjacent light emitting diodes come into close contact with each other.
The size of the display device can be reduced. Furthermore, when manufacturing a display device by arranging the light emitting diodes of the present invention vertically and horizontally, high mounting accuracy can be realized by surface mounting on a substrate.
Therefore, even if the light emitting surface is formed into a convex lens shape having a high light-condensing degree, the display device does not cause the problem of uneven brightness and uneven color due to misalignment during mounting.

In this manner, the dark noise due to the reflection of external light can be reduced to improve the contrast at the time of turning on and off, and the display device has a small size and more excellent characteristics. A light emitting diode that can be used.

According to a tenth aspect of the present invention, there is provided a display apparatus comprising a red light emitting diode, a green light emitting diode, and a blue light emitting diode using the light emitting diode according to any one of the first to ninth aspects. It is arranged in.

Each of the light-emitting diodes according to the first to ninth aspects can reduce the dark noise due to the reflection of external light and improve the contrast between the light-on state and the light-off state. By manufacturing a display device using the display device, a display device with high contrast can be obtained. Then, by combining the light emitting diodes that emit the three primary colors of red, green, and blue light into a set, all colors can be produced by adjusting the luminance of each color. By arranging such a set of light emitting diodes vertically and horizontally, a color display having excellent characteristics can be obtained.

In the case where there is a light emitting diode of the three primary colors having insufficient luminance, it is also possible to form a set of two or more light emitting diodes of that color.

[0039]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, embodiments of the light emitting diode and the display device according to the present invention will be described.

First Embodiment First, a first embodiment of the present invention will be described with reference to FIGS. FIG. 1A shows Embodiment 1 of the present invention.
Plan view showing the overall configuration of the light emitting diode according to
(B) is a longitudinal sectional view taken along line AA. FIG. 2 is a longitudinal sectional view showing a state in which a plurality of light emitting diodes according to the first embodiment of the present invention are mounted on a substrate and a black weather-resistant resin is filled between the light emitting diodes.

As shown in FIG. 1, in the light emitting diode 1 of the first embodiment, a pair of leads 3 a and 3 b for supplying power to the light emitting element 2 And the tip of one of the leads 3a is formed as a concave reflecting mirror 3c.
3b is sealed with a black epoxy resin 5 as a light absorbing material. At this time, leaving only the reflection surface of the reflection mirror 3c where the light emitting element 2 is mounted and the tip of the other lead 3b where the wire 4 is bonded,
Most of the tips of the pair of leads 3a and 3b are sealed with a black epoxy resin 5 as a light absorbing material.

Subsequently, the light emitting element 2 is mounted on the bottom surface of the reflecting mirror 3c, and the other lead 3b and the light emitting element 2 are bonded to each other with a wire 4 for electrical connection. Is sealed with a transparent epoxy resin 6 as a light transmitting material, and an elliptical convex lens is provided on the light emitting surface side of the light emitting element 2, that is, on the upper surface of the transparent epoxy resin 6. 7 is molded. Thereafter, the pair of leads 3 a and 3 b are bent at substantially right angles along the side surface of the black epoxy resin 5 at the portion drawn out from the black epoxy resin 5, and further bent along the lower surface of the black epoxy resin 5. Thus, the surface-mounted LED 1 is completed.

In the LED 1 having such a configuration, most of the tips of the pair of leads 3 a and 3 b are sealed with the black epoxy resin 5, and the entire lower surface of the transparent epoxy resin 6 is also covered with the black epoxy resin 5. Therefore, external light is not reflected on the pair of leads 3a and 3b or the lower surface of the transparent epoxy resin 6, and dark noise can be significantly reduced. In this manner, in the LED 1 of the first embodiment, the contrast between the lighting and the turning off can be improved by reducing the dark noise of the surface-mounted LED having various advantages.

Here, as shown in FIG. 1A, the periphery of the black epoxy resin 5 is formed in an octagon, and a pair of leads 3a and 3b are inclined in a direction oblique to the elliptical shape of the convex lens 7. Have been withdrawn. When manufacturing a display device by arranging the LEDs 1 of the first embodiment vertically and horizontally, the convex lenses 7 are arranged such that the major axis direction of the elliptical shape of the convex lens 7, that is, the horizontal direction in the drawing is horizontal. And LED1 is 1
A pair of leads 3a and 3b are drawn obliquely with respect to the elliptical shape of the convex lens 7, and are drawn within a rectangular range circumscribing the octagon around the black epoxy resin 5, so that the leads of the surrounding LEDs are drawn. And the mounting density can be increased to such an extent that adjacent LEDs are in close contact with each other.

Further, in the LED 1 of the first embodiment, the light emitting surface is formed by the convex lens 7 having an elliptical shape, so that when the display device is used, light is emitted in the vertical direction in the drawing, that is, in the vertical direction of the display device. The angle is small, and the light emission angle is wide in the horizontal direction of the display device, that is, in the horizontal direction of the display device. As a result, the display device has a luminance that can be viewed outdoors in the daytime and can be viewed from a wide range. Furthermore, in the LED 1 according to the first embodiment, since high mounting accuracy can be realized by surface mounting, even if a convex lens shape having a high light condensing degree does not cause a problem of uneven brightness and uneven color due to axial displacement during mounting. And can be.

Further, as shown in FIG. 1B, in the LED 1 of the first embodiment, one of the leads 3a
A reflecting mirror 3c is formed at the tip of the light emitting element 2, and the light emitting element 2 is mounted on the bottom surface of the reflecting mirror 3c. Thereby, the light radiated in the substantially horizontal direction from the light emitting surface of the light emitting element 2 can be reflected by the reflecting mirror 3c and radiated from the convex lens 7, so that the external radiation efficiency can be improved and Brightness can be further increased. In this manner, the dark noise due to the reflection of external light is reduced, and the external radiation efficiency is increased, so that the contrast at the time of lighting and at the time of lighting out can be further improved.

Next, a method of protecting the leads 3a and 3b when the LED 1 is surface-mounted on a substrate will be described with reference to FIG.
This will be described with reference to FIG. A large number of LEDs 1a, 1b, 1c, 1d,... Having the same configuration as the LED 1 of the first embodiment are arranged on the surface of the mounting substrate 9 on which the cream solder is applied, and the LED 1a, 1b, 1c, 1d,. It is fixed. Here, since the display device is often installed outdoors, a black weather-resistant resin 8 is filled between the LEDs and cured to prevent corrosion of the lead portion that is being pulled out. Covering the lead portions that are present. As the black weather-resistant resin 8, for example, a black urethane resin, a black silicon resin, or the like is used. At this time, the liquid level of the black weather-resistant resin 8 is
a, 1b, 1c, 1d,... are lower than the upper end of the black epoxy resin 5 on the outer periphery, and the lead portions 3 are drawn out.
a, must be controlled higher than 3b.

Second Embodiment Next, a second embodiment of the present invention will be described with reference to FIG. FIG. 3 is a longitudinal sectional view showing the entire configuration of the light emitting diode according to the second embodiment of the present invention.

As shown in FIG. 3, the light emitting diode 11 of the second embodiment has one of a pair of leads 13 a and 13 b for supplying power to the light emitting element 12.
First, a pair of leads 13a and 13b are sealed with a black epoxy resin 15 as a light-absorbing material. At this time, the reflection surface of the reflection mirror 13c where the light emitting element 12 is mounted is connected to the other lead 13 where the wire 14 is bonded.
Most of the tip portions of the pair of leads 13a and 13b are sealed with a black epoxy resin 15 as a light absorbing material, leaving only the tip of b. Here, the second embodiment
LED 11 has a pair of leads 13a, 13b
Are bent in the vicinity of the distal end, respectively, so that the pair of leads 13a and 13b is pulled out of the black epoxy resin 15 at a position lower than the height at which the light emitting element 12 is mounted.
The withdrawal height H2 of the a and 13b from the black epoxy resin 15 is lower than in the first embodiment.

Subsequently, the light emitting element 1 is placed on the bottom of the reflecting mirror 13c.
2 is mounted, and the other lead 13b and the light emitting element 12 are bonded to each other with a wire 14 for electrical connection. Then, the light emitting element 12, the reflecting surface of the reflecting mirror 13c, the tip of the other lead 13b and the wire 14 are connected. The light emitting element 12 is sealed with a transparent epoxy resin 16 as a light transmitting material.
A convex lens 17 is molded on the light emitting surface side of the above, that is, on the upper surface of the transparent epoxy resin 16. Then a pair of leads 13
The portions a and 13b are bent at substantially right angles along the side surfaces of the black epoxy resin 15 at the portions drawn out from the black epoxy resin 15, and further bent along the lower surface of the black epoxy resin 15. With this, the surface mount type LE
D11 is completed.

In the LED 11 having such a configuration, most of the tips of the pair of leads 13 a and 13 b are sealed with the black epoxy resin 15, and the entire lower surface of the transparent epoxy resin 16 is also covered with the black epoxy resin 15. Therefore, external light is not reflected on the pair of leads 13a, 13b or the lower surface of the transparent epoxy resin 16, and dark noise can be greatly reduced. In this way, in the LED 11 of the second embodiment, the dark noise due to the reflection of external light can be reduced, and the contrast between the lighting state and the lighting state can be improved.
The effect of providing the reflecting mirror 13c is similar to that of the first embodiment.

Further, in the LED 11 according to the second embodiment, the pair of leads 13a and 13b are bent near the tip portions, respectively, so that the height of the pair of leads 13a and 13b pulled out from the black epoxy resin 15 is increased. H2 is lower than in the first embodiment. After surface-mounting a large number of LEDs 11 on the substrate, as shown in FIG. 2, the black weather-resistant resin 8 is filled between the LEDs. At this time, the liquid level of the black weather-resistant resin 8 is Must be controlled to be lower than the upper end of the black epoxy resin and higher than the lead portion being pulled out.

In the LED 11 according to the second embodiment,
Since the lead-out height H2 of the pair of leads 13a and 13b is reduced, the difference from the height H1 of the upper end of the black epoxy resin 15 around the LED is large. Therefore,
It is extremely easy to control the liquid level of the black weather-resistant resin 8 to be lower than H1 and higher than H2, and it has a feature that the manufacturing of the display device becomes easy.

As described above, the LED 11 according to the second embodiment
In, the dark noise due to the reflection of external light can be reduced to improve the contrast at the time of turning on and off, and the manufacturing becomes easier when the display device is used.

Third Embodiment Next, a third embodiment of the present invention will be described with reference to FIG. FIG. 4 is a longitudinal sectional view showing the entire configuration of the light emitting diode according to the third embodiment of the present invention.

As shown in FIG. 4, the light emitting diode 21 of the third embodiment has one of the leads 23a and 23b for supplying power to the light emitting element 22.
First, a pair of leads 23a and 23b are sealed with a black epoxy resin 25 as a light-absorbing material. At this time, the other lead 23 which is a portion where the wire 24 is bonded to the reflection surface of the reflection mirror 23c where the light emitting element 22 is mounted is mounted.
Most of the tips of the pair of leads 23a and 23b are sealed with a black epoxy resin 25 as a light-absorbing material except for the tip of b. Here, the third embodiment
In the LED 21, a light shielding wall 25a is provided by increasing the outer peripheral portion of the black epoxy resin 25.

Subsequently, the light emitting element 2 is placed on the bottom of the reflecting mirror 23c.
2 is mounted, and the other lead 23b and the light emitting element 22 are bonded to each other with a wire 24 to make electrical connection. Then, the light emitting element 22, the reflecting surface of the reflecting mirror 23c, the tip of the other lead 23b and the wire 24 are connected. The light emitting element 22 is sealed with a transparent epoxy resin 26 as a light transmitting material.
A convex lens 27 is molded on the light emitting surface side of the above, that is, on the upper surface of the transparent epoxy resin. Then, a pair of leads 23
The portions a and 23b are bent at substantially right angles along the side surfaces of the black epoxy resin 25 at the portions drawn out from the black epoxy resin 25, and further bent along the lower surface of the black epoxy resin 25. With this, the surface mount type LE
D21 is completed.

Here, the light shielding wall 25a is provided within a range in which the height and the shape do not block the normal radiated light optically controlled by the convex lens 27, and as shown in FIG. When the LEDs 1a, 1b, 1c, 1d,...
A phenomenon called so-called crosstalk occurs in which stray light L radiated in the lateral direction from a is reflected by the surface of the convex lens of the adjacent unlit LED 1b to cause pseudo lighting. The light-shielding wall 25a according to the third embodiment can prevent crosstalk without blocking normal radiation light optically controlled by the convex lens 27 by blocking stray light from being emitted in the horizontal direction.

In the LED 21, most of the tips of the pair of leads 23 a and 23 b are sealed with the black epoxy resin 25, and the transparent epoxy resin 2
6 is also covered with the black epoxy resin 25, so that external light is not reflected on the pair of leads 23a, 23b or the lower surface of the transparent epoxy resin 26, and dark noise can be greatly reduced. it can.

Furthermore, since the height of the upper end of the outer periphery of the black epoxy resin 25 is increased by the light-shielding wall 25a, it is easy to control the liquid level when filling the black weather-resistant resin between the LEDs when the display device is used. Become. The effect of providing the reflecting mirror 23c is the same as in the first and second embodiments.

As described above, the LED 21 according to the third embodiment
Can reduce the dark noise due to the reflection of external light, improve the contrast at the time of turning on and off, can prevent crosstalk when the display device is used, and when the display device Manufacturing is easier.

Fourth Embodiment Next, a fourth embodiment of the present invention will be described with reference to FIG. FIG. 5A is a plan view showing the entire configuration of a light emitting diode according to a fourth embodiment of the present invention, and FIG.
It is a longitudinal cross-sectional view in the B line.

As shown in FIG. 5, the light emitting diode 31 of the fourth embodiment has one of the leads 33a and 33b for supplying power to the light emitting element 32.
First, a pair of leads 33a and 33b are sealed with a black epoxy resin 35 as a light-absorbing material. At this time, the other lead 33 which is a portion where the wire 34 is bonded to the reflection surface of the reflection mirror 33c where the light emitting element 32 is mounted is mounted.
Most of the tip portions of the pair of leads 33a and 33b are sealed with a black epoxy resin 35 as a light absorbing material, leaving only the tip of b. Here, Embodiment 4
In the LED 31, the light shielding wall 35a is provided by increasing the outer peripheral portion of the black epoxy resin 35. Also, the pair of leads 33a, 33b is bent in the vicinity of the distal end portion, respectively, so that the pair of leads 33a, 33b is bent.
b is drawn out of the black epoxy resin 35 at a position lower than the height at which the light emitting element 32 is mounted, and the black epoxy resin 3 of the pair of leads 33a and 33b is drawn.
The drawer height from 5 is low.

Subsequently, the light emitting element 3 is provided on the bottom of the reflecting mirror 33c.
2 is mounted and the other lead 33b and the light emitting element 32 are electrically connected by bonding with a wire 34, and then the light emitting element 32, the reflecting surface of the reflecting mirror 33c, the tip of the other lead 33b and the wire 34 are connected. The light emitting element 32 is sealed with a transparent epoxy resin 36 as a light transmitting material.
A convex lens 37 having an elliptical shape is molded on the light emitting surface side, that is, on the upper surface of the transparent epoxy resin 36. Thereafter, the pair of leads 33 a and 33 b is bent at a substantially right angle along the side surface of the black epoxy resin 35 at a portion drawn from the black epoxy resin 35, and further bent along the lower surface of the black epoxy resin 35. Thus, the surface-mounted LED 31 is completed.

In the LED 31 having such a configuration, most of the tips of the pair of leads 33 a and 33 b are sealed with the black epoxy resin 35, and the entire lower surface of the transparent epoxy resin 36 is also covered with the black epoxy resin 35. Therefore, external light is not reflected on the lower surface of the pair of leads 33a, 33b or the transparent epoxy resin 36, and dark noise can be significantly reduced. The effect of providing the reflecting mirror 33c is the same as in the first to third embodiments.

As shown in FIG. 5A, the periphery of the black epoxy resin 35 is formed in an octagonal shape, and a pair of leads 33a and 33b are drawn obliquely to the elliptical shape of the convex lens 37. Have been. LE of Embodiment 4
When the display device is manufactured by arranging D31 vertically and horizontally, the convex lens 37 is arranged such that the major axis direction of the elliptical shape of the convex lens 37, that is, the illustrated left-right direction faces the horizontal direction. And LE
D31 is a pair of leads 33a and 33b each having a convex lens 37.
Is drawn obliquely with respect to the elliptical shape of the black epoxy resin 35, and is drawn within a rectangular range circumscribing the octagon around the black epoxy resin 35, so that it does not interfere with the leads of the surrounding LEDs and is adjacent to the black epoxy resin 35. The mounting density can be increased to such an extent that the LEDs adhere to each other.

Further, in the LED 31 according to the fourth embodiment, the light emitting surface is formed by the convex lens 37 having an elliptical shape, so that when the display device is used, light is emitted in the vertical direction in the drawing, that is, in the vertical direction of the display device. The angle is small, and the light emission angle is wide in the horizontal direction of the display device, that is, in the horizontal direction of the display device. As a result, the display device has a luminance that can be viewed outdoors in the daytime and can be viewed from a wide range. Furthermore, in the LED 31 of the fourth embodiment, the surface mounting
Since high mounting accuracy can be achieved, even a convex lens shape having a high light condensing degree can be free from the problem of uneven brightness and uneven color due to axial misalignment during mounting.

Also, in the LED 31 of the fourth embodiment, the pair of leads 33a and 33b are bent near the tip portions, respectively, so that the pair of leads 3a and 33b are bent.
The height of 3a and 33b pulled out from the black epoxy resin 35 is reduced. After surface-mounting a large number of LEDs 31 on the substrate, the black weather-resistant resin 8 is filled between the LEDs as shown in FIG. 2, and the liquid level of the black weather-resistant resin 8 at this time is Must be controlled to be lower than the upper end of the black epoxy resin and higher than the lead portion being pulled out. In the LED 31 according to the fourth embodiment, the height of the pair of leads 33a and 33b is reduced, so that the black epoxy resin 3 around the LED is used.
The difference from the height of the upper end of No. 5 is large. Therefore, the liquid level control of the black weather-resistant resin 8 is extremely easy, and the display device is easily manufactured.

Further, the light-shielding wall 35a is provided within a range in which the height and the shape do not block the normal radiated light optically controlled by the convex lens 37, and as shown in FIG. , 1b, 1c, 1d,... Are mounted on the substrate 9 in close proximity to each other,
Crosstalk occurs that causes the stray light L radiated in the lateral direction from a to be reflected on the convex lens surface of the adjacent unlit LED 1b and causes pseudo lighting. The light-shielding wall 35a according to the fourth embodiment can prevent crosstalk without blocking stray light from being emitted in the horizontal direction, thereby blocking normal emitted light optically controlled by the convex lens 37.

As described above, the LED 31 according to the fourth embodiment
In, the contrast between the lighting and the turning off can be improved by reducing the dark noise due to the reflection of external light, and the display device can be easily manufactured and has excellent characteristics.

Fifth Embodiment Next, a fifth embodiment of the present invention will be described with reference to FIG. FIG. 6 is a longitudinal sectional view showing the entire configuration of the light emitting diode according to the fifth embodiment of the present invention.

As shown in FIG. 6, the light emitting diode 41 of the fifth embodiment has one of the leads 43a and 43b for supplying power to the light emitting element 42.
The tip of a is a concave reflecting mirror 43c. The light emitting element 42 is mounted on the bottom surface of the reflecting mirror 43c, and the other lead 43b and the light emitting element 42 are bonded to each other with a wire 44 to make electrical connection. Then, the light emitting element 42 and the pair of leads 43a and 43b are connected. A part and the wire 44 are sealed with a transparent epoxy resin 46 as a light transmitting material, and a convex lens 47 is molded on the light emitting surface side of the light emitting element 42, that is, on the upper surface of the transparent epoxy resin 46.

Subsequently, the outside of the transparent epoxy resin 46 is sealed with a black epoxy resin 45 as a light absorbing material so as to cover the lower portion. Here, the LED of the fifth embodiment
In 41, a light shielding wall 45a is provided by raising the outer peripheral portion of the black epoxy resin 45. Thereafter, the pair of leads 43a and 43b is bent at a substantially right angle along the side surface of the black epoxy resin 45 at a portion drawn out from the black epoxy resin 45, and then the black epoxy resin 45 is further bent.
Is bent along the lower surface of. Thus, the surface-mounted LED 41 is completed.

In the LED 41 having such a structure, first, the light emitting element 42, the wire 44, and the pair of leads 43a, 43
Since most of the tip of 3b is sealed with the transparent epoxy resin 46, the interface between the transparent epoxy resin 46 and the black epoxy resin 45 is formed by a pair of leads 43a, 43.
b, the pair of leads 43a,
It is possible to reduce product defects due to cracks at the interface between the transparent epoxy resin 46 and the black epoxy resin 45 due to the difference in the coefficient of thermal expansion from that of 43b, thereby improving the yield. Then, a pair of leads 43a, 4
Although the reflection of external light at most of the tip of 3b cannot be prevented, external light may be reflected at the lower surface of the transparent epoxy resin 46 since the entire lower surface of the transparent epoxy resin 46 is covered with the black epoxy resin 45. And dark noise can be significantly reduced.

Further, the light-shielding wall 45a can prevent crosstalk in a display device. Furthermore, the black epoxy resin 4
Since the upper end height of the outer periphery of 5 is increased, the liquid level control when filling the black weather-resistant resin between the LEDs when the display device is used becomes easy. The effect of providing the reflecting mirror 43c is the same as in the first to fourth embodiments.

As described above, the LED 41 according to the fifth embodiment
Can reduce the dark noise due to the reflection of external light, improve the contrast between lighting and turning off, increase the yield, prevent crosstalk when used as a display device, The device is easy to manufacture.

Sixth Embodiment Next, a sixth embodiment of the present invention will be described with reference to FIG. FIG. 7 is a longitudinal sectional view showing the entire configuration of the light emitting diode according to the sixth embodiment of the present invention.

As shown in FIG. 7, the light emitting diode 51 according to the sixth embodiment has one of the leads 53 a and 53 b for supplying power to the light emitting element 52.
The tip of a is a concave reflecting mirror 53c. After the light emitting element 52 is mounted on the bottom surface of the reflecting mirror 53c and the other lead 53b and the light emitting element 52 are electrically connected by bonding with the wire 54, a pair of leads 53a and 5
A ring-shaped light absorbing member 58 made of a black resin having a size to cover a portion sealed with the transparent epoxy resin 3b is mounted on the pair of leads 53a and 53b. Then, the light emitting element 52, a part of the pair of leads 53a and 53b, the wire 54 and the light absorbing member 58 are sealed with a transparent epoxy resin 56 as a light transmitting material, and the light emitting surface side of the light emitting element 52, that is, transparent. A convex lens 57 is molded on the upper surface of the epoxy resin 56.

Subsequently, the outside of the transparent epoxy resin 56 is sealed with a black epoxy resin 55 as a light absorbing material so as to cover the lower portion. Here, the LED of the sixth embodiment
Also in 51, the light shielding wall 55a is provided by raising the outer peripheral portion of the black epoxy resin 55. Thereafter, the pair of leads 53a and 53b are bent at a substantially right angle along the side surface of the black epoxy resin 55 in a portion drawn out from the black epoxy resin 55, and further, the black epoxy resin 55
Is bent along the lower surface of. Thus, the surface-mount type LED 51 is completed.

In the LED 51 having such a configuration, first, the light emitting element 52, the wire 54, and the pair of leads 53a, 5
Since most of the tip of 3b is sealed with the transparent epoxy resin 56, the interface between the transparent epoxy resin 56 and the black epoxy resin 55 forms a pair of leads 53a, 53.
b, the pair of leads 53a,
Product defects due to cracks at the interface between the transparent epoxy resin 56 and the black epoxy resin 55 due to a difference in the coefficient of thermal expansion from the product 53b can be reduced, and the yield can be improved. Then, inside the transparent epoxy resin 56, a ring-shaped light absorbing member 58 is provided over the entire periphery of the transparent epoxy resin 56 so as to cover most of the tip portions of the pair of leads 53a, 53b. Since the entire lower surface of the 56 is also covered with the black epoxy resin 55, external light is not reflected on the pair of leads 53a, 53b or the lower surface of the transparent epoxy resin 56, so that dark noise can be greatly reduced. it can.

The light absorbing member 58 does not necessarily have to be a ring-shaped member over the entire periphery of the transparent epoxy resin 56, but may be any member as long as it covers most of the tips of the pair of leads 53a and 53b. Such a shape may be used.

Further, the light-shielding wall 55a can prevent crosstalk in a display device. Further, the black epoxy resin 5 is formed by the light shielding wall 55a.
Since the upper end height of the outer periphery of 5 is increased, the liquid level control when filling the black weather-resistant resin between the LEDs when the display device is used becomes easy. The effect of providing the reflecting mirror 53c is the same as in the first to fifth embodiments.

As described above, the LED 51 of the sixth embodiment
Can reduce the dark noise due to the reflection of external light to improve the contrast between lighting and turning off, increase the yield, prevent crosstalk when used as a display device, and reduce The device is easy to manufacture.

Seventh Embodiment Next, a seventh embodiment of the present invention will be described with reference to FIG. FIG. 8 is a front view showing a part of the configuration of the display device according to the seventh embodiment of the present invention.

As shown in FIG. 8, the display device 61 of the seventh embodiment is different from the LED 1 of the first embodiment in that the red LED 1 R
And a green LED 1G using the light emitting element 2 as a green light emitting element
And a blue LED 1B using the light emitting element 2 as a blue light emitting element are arranged in a triangular shape to form a set of LED groups (one pixel) 62. The one pixel 62 corresponds to the substrate 6
The display device 61 is arranged 16 × 16 vertically and horizontally on the display device 3.

The LED 1 according to the first embodiment can reduce the dark noise due to the reflection of external light and improve the contrast at the time of lighting and at the time of turning off. By using this, the display device 61 is manufactured. The display device has high contrast. The LED 1 has a pair of leads 3 which are diagonally opposed to each other in an octagonal shape.
Since a and 3b are drawn out, even if they are closely mounted to such a degree that they are almost in close contact with adjacent LEDs as shown in FIG. 8, they do not come into contact with the leads of adjacent LEDs. And LED1 which emits three primary colors of red, green and blue light
By setting R, 1G, and 1B as a set, all colors can be created by adjusting the luminance of each color.
By arranging one pixel 62 of the LEDs 1R, 1G, and 1B vertically and horizontally, a color display having excellent characteristics can be obtained.

Eighth Embodiment Next, an eighth embodiment of the present invention will be described with reference to FIG. FIG. 9 is a front view showing a part of the configuration of the display device according to the eighth embodiment of the present invention.

As shown in FIG. 9, the display device 71 of the eighth embodiment is different from the LED 1 of the first embodiment in that a red LED 1R in which the light emitting element 2 is a red light emitting element.
And a green LED using the light emitting element 2 as a green light emitting element
1G and a blue LED 1 having a light emitting element 2 as a blue light emitting element
B, a total of four LEDs are arranged in a square shape, and a set of L
An ED group (one pixel) 72 is formed. This one pixel 72 is arranged 16 × 16 vertically and horizontally on a substrate 73,
The display device 71 is configured. Here, two red LEDs 1R are arranged in one pixel.
This is because it is suitable as a balance for obtaining white light having the highest luminous intensity by using three LEDs.

The LED 1 according to the first embodiment can reduce the dark noise due to the reflection of external light and improve the contrast between the light-on state and the light-off state. By using this, the display device 71 is manufactured. The display device has high contrast. The LED 1 has a pair of leads 3 which are diagonally opposed to each other in an octagonal shape.
Since a and 3b are drawn out, as shown in FIG. 9, even if they are densely mounted to such a degree that they are almost in close contact with the adjacent LEDs, they do not come into contact with the leads of the adjacent LEDs. And LED1 which emits three primary colors of red, green and blue light
By combining R2 and each of the LEDs 1G and 1B as one set, all colors can be created by adjusting the luminance of each color. By arranging one pixel 72 of the LEDs 1R, 1G, and 1B vertically and horizontally, a color display having excellent characteristics can be obtained.

In Embodiments 7 and 8, the light emitting diodes 1 of Embodiment 1 are used as the light emitting diodes constituting the display devices 61 and 71, but the light emitting diodes of Embodiments 2 to 6 are used. Can also provide a display device having excellent characteristics.

In each of the above embodiments, power is supplied to the light emitting element by the lead and the wire. However, the form in which the light emitting element is electrically connected to the lead is not limited to this. For example, a Zener diode having a light emitting element mounted thereon may be mounted on one lead, and the Zener diode and the other lead may be electrically connected by a wire. Or,
A bipolar electrode may be provided on the lower side of the light emitting element, and may be electrically connected to a lead by a bump or the like (in this case, a wire is unnecessary).

Further, in each of the above-described embodiments, an example has been described in which a transparent epoxy resin is used as the light-transmitting material and a black epoxy resin is used as the light-absorbing material. Any light-transmitting material and light-absorbing material may be used as long as they satisfy conditions such as transparency or light-absorbing property and strength.

In each of the above embodiments, an example was described in which the tip of one lead was used as a reflecting mirror and a light emitting element was mounted on the bottom surface. However, it is not always necessary to use a reflecting mirror. A light emitting element may be mounted.

The configuration, shape, material, quantity, size, connection relationship, and the like of the light emitting diode and other parts of the display device are not limited to the above embodiments.

[0095]

As described above, the light emitting diode according to the first aspect of the present invention has a light emitting element, a lead for supplying power to the light emitting element, a light transmitting material, and preventing reflection of external light. A light-absorbing material, wherein the lead is drawn out in a lateral direction with respect to a central radiation direction of the light-emitting element, and electrically connects the light-emitting element and the light-emitting element to the lead by the light-transmitting material. Is performed, a light-emitting surface is formed on the light-emitting surface side of the light-emitting element, and the light-absorbing material allows the light-transmitting material to have a part of the rear side and side surfaces of the light-emitting element. What is covered.

In the light emitting diode of the present invention, the light emitting element and a portion for electrically connecting the light emitting element to the lead are sealed with a light transmitting material, and a light emitting surface is formed on the light emitting surface side of the light emitting element. You. Thereafter, the light-absorbing material covers the back surface and a part of the side surface of the light-emitting element made of the light-transmitting material.

In the light emitting diode having such a configuration,
First, because the light emitting element and the portion for electrically connecting the light emitting element to the lead are sealed with a light transmitting material,
Since the interface between the light-transmitting material and the light-absorbing material is not located along the lead, a product due to cracks at the interface between the light-transmitting material and the light-absorbing material due to the difference in thermal expansion coefficient with the lead Defects can be reduced, and the yield can be improved. And reflection of outside light in the lead drawn out in the side direction cannot be prevented,
Since the entire rear surface of the light-emitting element made of a light-transmitting material is covered with the light-absorbing material, external light is not reflected on the rear surface of the light-transmitting material, and dark noise can be significantly reduced.

In this way, the light emitting diode can reduce the dark noise due to the reflection of external light, improve the contrast at the time of turning on and off, and increase the yield.

According to a second aspect of the present invention, in the light emitting diode according to the first aspect of the present invention, only the periphery of a portion where the light emitting element is electrically connected to the lead is sealed with the light transmitting material. The lead is sealed around a sealing portion of the lead by the light transmitting material.

In the light emitting diode according to the present invention, most of the lead drawn out in the lateral direction is sealed with the light absorbing material except for the periphery of the portion where the light emitting element is electrically connected to the lead. Subsequently, an electrical connection is made between the light emitting element and the lead, only the periphery of the electrical connection portion is sealed with a light transmitting material that is in close contact with the light absorbing material, and light is emitted to the light emitting surface side of the light emitting element. A surface is formed.

In the light emitting diode having such a configuration,
In addition to the effect of claim 1, most of the leads drawn in the lateral direction are sealed with a light absorbing material, and the entire back surface of the light transmitting material is also covered with the light absorbing material. Therefore, external light is not reflected on the lead or the back surface of the light transmitting material, and dark noise can be greatly reduced.

In this manner, a light-emitting diode can be provided in which the dark noise due to the reflection of external light can be significantly reduced and the contrast between when the light is turned on and when the light is turned off can be improved.

According to a third aspect of the present invention, in the light emitting diode according to the first aspect of the present invention, the light emitting element and the portion for electrically connecting the light emitting element to the lead are provided inside the light transmitting material. A light absorbing member that covers most of the leads is provided.

In a light emitting diode having such a configuration,
First, because the light emitting element and the portion for electrically connecting the light emitting element to the lead are sealed with a light transmitting material,
Since the interface between the light-transmitting material and the light-absorbing material is not located along the lead, a product due to cracks at the interface between the light-transmitting material and the light-absorbing material due to the difference in thermal expansion coefficient with the lead Defects can be reduced, and the yield can be improved. In addition to the effect of claim 1, a light absorbing member that covers most of the leads inside the light transmitting material is provided, and the entire back surface of the light transmitting material is also covered with the light absorbing material. Therefore, external light is not reflected on the lead or the rear surface of the light transmitting material, and dark noise can be greatly reduced.

In this manner, the light emitting diode is able to improve the contrast at the time of turning on and off the light by drastically reducing dark noise due to the reflection of external light, and to increase the yield.

According to a fourth aspect of the present invention, in the light-emitting diode according to any one of the first to third aspects, the light-emitting surface is a convex lens that emits light emitted from the light-emitting element to the outside. Things.

When the light emitting surface of the light emitting diode is formed as such a convex lens, in addition to the effect according to any one of the first to third aspects, the light emitted from the light emitting element is radiated outside the converged light. If it is mounted on a substrate to form a display device, the display device has a luminance that can be visually recognized even during the daytime outdoors.

As described above, the dark noise due to the reflection of external light can be reduced to improve the contrast at the time of turning on and off, and the light emitting diode can have more excellent characteristics when it is used as a display device. .

According to a fifth aspect of the present invention, in the light emitting diode according to any one of the first to fourth aspects, a concave reflecting mirror is formed on the lead, and the light emitting element is provided on a bottom surface of the reflecting mirror. The one that is mounted.

In a light emitting diode having such a configuration,
In addition to the effect described in any one of claims 1 to 4, light emitted in a substantially horizontal direction from the light emitting surface of the light emitting element can be reflected by the reflecting mirror and emitted from the light emitting surface. As a result, the external radiation efficiency can be improved, and the luminance during lighting can be further increased.

As described above, by reducing the dark noise due to the reflection of external light and increasing the external radiation efficiency, the light emitting diode can further improve the contrast at the time of turning on and off.

According to a sixth aspect of the present invention, in the light emitting diode according to any one of the first to fifth aspects, the lead is provided at a position lower than a height at which the light emitting element is mounted. It is derived from a conductive material.

Since the display device is often installed outdoors, a large number of light emitting diodes are soldered to a mounting substrate in order to prevent corrosion of the lead portion that has been drawn out, and then a black light emitting diode is provided between the light emitting diodes. Filling and curing the weather-resistant resin to cover the lead portion that is drawn out is performed. Here, the liquid surface of the black weather-resistant resin must be controlled to be lower than the upper end of the light-absorbing material on the outer periphery of the light emitting diode and higher than the lead portion from which the lead is drawn.

In the light emitting diode of the present invention, the lead is drawn out of the light absorbing material at a position lower than the height at which the light emitting element is mounted.
In addition to the effects described in any one of the first to fifth aspects, the drawing position is low, and the difference in height from the upper end of the light absorbing material on the outer periphery is large. This facilitates the liquid level control when filling the black weather resistant resin between the light emitting diodes.

In this way, the dark noise due to the reflection of external light can be reduced to improve the contrast at the time of turning on and off, and the light emitting diode can be manufactured more easily when it is used as a display device. .

A light emitting diode according to a seventh aspect of the present invention is the light emitting diode according to any one of the first to sixth aspects, wherein the light is controlled so as not to block the normal optically controlled emitted light around the light emitting surface. A light shielding wall made of the light absorbing material is provided.

When a light emitting diode is densely mounted to form a display device, stray light radiated from the light emitting diode in the horizontal direction is not turned on because the interval between the adjacent light emitting diodes is short. The phenomenon called so-called crosstalk, which is reflected on the light emitting surface of the light emitting diode and causes pseudo lighting, is likely to occur. Therefore, a light-shielding wall made of a light-absorbing material is provided around the light-emitting surface within a range where normal optically-controlled light is not blocked.
In addition to the effects described in any one of the sixth to sixth aspects, it is possible to prevent stray light from reaching an adjacent light emitting diode, thereby preventing crosstalk from occurring. Also,
Since the height of the upper end of the outer periphery of the light-absorbing material is increased, liquid level control when filling a black weather-resistant resin between the light emitting diodes when forming a display device becomes easy.

In this manner, dark noise due to reflection of external light can be reduced to improve the contrast between when light is turned on and when light is turned off, and when a display device is used, crosstalk can be prevented. A light emitting diode that is easier to manufacture when used as a display device.

According to an eighth aspect of the present invention, in the light emitting diode according to any one of the first to seventh aspects, the lead is drawn into a rectangular area circumscribing a package made of the light absorbing material. Is what it is.

When manufacturing the display device by arranging the light emitting diodes of the present invention vertically and horizontally, in addition to the effects described in any one of the first to seventh aspects, the leads are circumscribed to the package made of the light absorbing material. Since it is drawn into the rectangular area, even if it is mounted in close contact with the surrounding light emitting diodes, it does not interfere with the leads of the surrounding light emitting diodes. Therefore, the mounting density can be increased to such an extent that adjacent light emitting diodes are in close contact with each other.

In this way, the light emitting diode which can reduce the dark noise due to the reflection of the external light to improve the contrast between the lighting state and the lighting state and can increase the mounting density when the display device is used. Become.

According to a ninth aspect of the present invention, in the light emitting diode according to any one of the first to eighth aspects, the light emitting diode is surface-mounted on a substrate.

Thus, in addition to the effects described in any one of the first to eighth aspects, the size of the light emitting diode can be reduced, and the mounting density can be reduced to such an extent that the adjacent light emitting diodes are in close contact with each other. Therefore, the size of the display device can be reduced. Furthermore, when manufacturing a display device by arranging the light emitting diodes of the present invention vertically and horizontally, high mounting accuracy can be realized by surface mounting on a substrate. Therefore, even if the light emitting surface is formed into a convex lens shape having a high light-condensing degree, the display device does not cause the problem of uneven brightness and uneven color due to misalignment during mounting.

In this way, the light emitting diode which can reduce the dark noise due to the reflection of the external light to improve the contrast between the light-on state and the light-off state, and can have excellent characteristics when used as a display device. Becomes

According to a tenth aspect of the present invention, there is provided a display device comprising a red light emitting diode, a green light emitting diode, and a blue light emitting diode using the light emitting diode according to any one of the first to ninth aspects. It is arranged in.

The light emitting diodes according to the first to ninth aspects can reduce the dark noise due to the reflection of external light and improve the contrast between the lighting state and the lighting state. By manufacturing a display device using the display device, a display device with high contrast can be obtained. Then, by combining the light emitting diodes that emit the three primary colors of red, green, and blue light into a set, all colors can be produced by adjusting the luminance of each color. By arranging such a set of light emitting diodes vertically and horizontally, a color display having excellent characteristics can be obtained.

[Brief description of the drawings]

FIG. 1A is a plan view showing an entire configuration of a light emitting diode according to a first embodiment of the present invention, and FIG.
It is a longitudinal cross-sectional view in the A line.

FIG. 2 is a longitudinal sectional view showing a state in which a plurality of light emitting diodes according to the first embodiment of the present invention are mounted on a substrate and a black weather-resistant resin is filled between the light emitting diodes.

FIG. 3 is a longitudinal sectional view showing the entire configuration of the light emitting diode according to the second embodiment of the present invention.

FIG. 4 is a longitudinal sectional view showing the entire configuration of the light emitting diode according to the third embodiment of the present invention.

FIG. 5A is a plan view showing the entire configuration of a light emitting diode according to a fourth embodiment of the present invention, and FIG.
It is a longitudinal cross-sectional view in the B line.

FIG. 6 is a longitudinal sectional view showing the entire configuration of a light emitting diode according to a fifth embodiment of the present invention.

FIG. 7 is a longitudinal sectional view showing the entire configuration of a light emitting diode according to a sixth embodiment of the present invention.

FIG. 8 is a front view showing a part of a configuration of a display device according to a seventh embodiment of the present invention.

FIG. 9 is a front view showing a part of the configuration of the display device according to the eighth embodiment of the present invention.

FIG. 10 is a longitudinal sectional view showing the entire configuration of a conventional light emitting diode.

[Explanation of symbols]

1, 11, 21, 31, 41, 51 Light emitting diode 1B Blue light emitting diode 1G Green light emitting diode 1R Red light emitting diode 2, 12, 22, 32, 42, 52 Light emitting elements 3a, 3b, 13a, 13b, 23a, 23b, 33
a, 33b, 43a, 43b, 53a, 53b Lead 3c, 13c, 23c, 33c, 43c, 53c Reflecting mirror 5, 15, 25, 35, 45, 55 Light absorbing material 6, 16, 26, 36, 46, 56 light transmitting material 7, 17, 27, 37, 47, 57 light emitting surface (convex lens) 25a, 35a, 45a, 55a light shielding wall 58 light absorbing member 61, 71 display device

 ────────────────────────────────────────────────── ─── Continuing on the front page (72) Yoshinobu Suehiro Inventor 1 Feng Term, Ochiai Ochiai, Kasuga-cho, Nishi-Kasugai-gun, Aichi F-term (reference) 5C058 AA13 AB06 BA08 5C094 AA07 AA16 AA42 BA25 CA19 CA24 ED01 ED11 ED15 ED20 5F041 AA14 AA41 DA07 DA12 DA17 DA26 DA31 DA34 DA44 DA55 DA58 DA82 DB02 DB08 DC02 DC03 DC08 DC10 DC68 FF06

Claims (10)

[Claims] 1. A light-emitting element, comprising: a lead for supplying power to the light-emitting element; a light-transmitting material; and a light-absorbing material for preventing reflection of external light, wherein the lead is provided on the light-emitting element. The light-emitting material and a portion for electrically connecting the light-emitting element to the lead are sealed with the light-transmitting material, and the light-transmitting material is pulled out in a lateral direction with respect to a central radiation direction. A light emitting surface is formed on the light-emitting element, and the light-absorbing material covers a part of a back surface and side surfaces of the light-emitting element of the light-transmitting material. 2. The light transmissive material seals only the periphery of a portion where the light emitting element is electrically connected to the lead, and the light absorbing material seals the lead with the light transmissive material. The light emitting diode according to claim 1, wherein a periphery of the stop is sealed. 3. A light-absorbing member which covers most of the lead except for a portion for electrically connecting the light-emitting element and the light-emitting element to the lead inside the light-transmitting material. The light emitting diode according to claim 1. 4. The light emitting diode according to claim 1, wherein the light emitting surface is a convex lens that collectively emits light emitted from the light emitting element. 5. A concave reflecting mirror is formed on said lead,
The light emitting diode according to any one of claims 1 to 4, wherein the light emitting element is mounted on a bottom surface of the reflector. 6. The light-emitting device according to claim 1, wherein the lead is led out of the light-absorbing material at a position lower than a height at which the light-emitting element is mounted. A light-emitting diode according to claim 1. 7. A light-shielding wall made of the light-absorbing material is provided around the light-emitting surface within a range that does not block normal optically-controlled radiated light. 7. The light emitting diode according to any one of 6. 8. The light emitting diode according to claim 1, wherein the lead is drawn out into a rectangular area circumscribing the package made of the light absorbing material. 9. The light emitting diode according to claim 1, wherein the light emitting diode is surface-mounted on a substrate. 10. A red light-emitting diode using the light-emitting diode according to any one of claims 1 to 9,
A display device comprising a set of a green light emitting diode and a blue light emitting diode arranged vertically and horizontally.