JP6273541B1 - Light bulb type LED to prevent unpleasant glare - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a light bulb type LED 19 that reduces unpleasant glare and has a scattering cover 2 having a secondary scattering wall body 5 that is reduced in unpleasant glare and has a heat dissipation effect. Rather than a primary scattering cover 4 in which the scattering cover 2 of the bulb-type LED 1 is a simple dome-shaped scattering cover 3, a composite secondary scattering wall that is formed integrally with the same material or combined with another part. The body 5 reduces the discomfort glare that can be produced in the lateral direction. At the same time, heat is radiated from the secondary scattering wall 5 having an increased surface area. [Selection] Figure 1

Description

  The present invention relates to a scattering cover that reduces unpleasant glare in a bulb-type LED.

  Conventionally, the idea of a scattering cover that reduces the unpleasant glare of a light bulb type LED has been patent 5363864 (bulb type LED). In this patent, a cover container corresponding to a glass bulb of a light bulb is filled with a scattering material, and the LED is positioned in a bag-like recess provided in a substantially central part of the cover container.

  The idea of a bulb-type LED is the result of pursuing the merit that it can be used as it is even with a conventional power supply socket. I will. This bulb-type LED has extremely little power to obtain brightness comparable to that of conventional incandescent bulbs, making it a revolutionary product in an energy-saving society.

  Although the LED element itself generates a lot of heat, the light-emitting LED has almost no heat generation component when it is dissipated by a heat sink mounted on the circuit board, and the light bulb-type LED scattering cover requires only a small volume. On the other hand, the volume of the glass bulb of the conventional incandescent bulb is large because there is no heat sink for heat dissipation and it is necessary to enclose a considerable amount of inert gas such as argon gas in order to reduce filament burnout. .

  In this way, the bulb-type LED was able to obtain high brightness even though it was small compared to the conventional incandescent bulb, while the bulb-type LED had multiple LEDs with high brightness to obtain the same brightness as the conventional incandescent bulb Therefore, there is also a problem that even when covered with a milky white scattering cover, it feels dazzling and gives a strong feeling of visual discomfort so-called discomfort glare. In terms of sensation, it is said that bulb-type LEDs have more unpleasant glare than conventional incandescent bulbs. It has also been pointed out that there is a fear of degrading glare that reduces the appearance of glare.

  The problem of the unpleasant glare and the reduced glare was the same as that of the conventional incandescent bulb. For reference, in the field of lighting, the range of plus or minus 30 degrees centered on the line of sight has been called the glare zone, and it has been the basis of lighting that there is no light source with high brightness in this range. Therefore, from that point of view, it is not preferable to use a conventional incandescent bulb or a bulb-type LED as it is. Incidentally, unpleasant glare in lighting means that the higher the luminance of the light source, the larger the apparent size of the light source, the smaller the angle between the light source and the viewing angle, the lower the luminance of the background, that is, the darker the background is. It is supposed to become stronger.

Patent 5363864

  However, in actuality, it may be used as it is depending on the application. For example, a ball-type incandescent bulb has been used in front of the mirror in the bathroom because of space. The same applies to chandelier bulbs. The ball-type incandescent bulb is a globe type with a large glass bulb, so the brightness is lower than that of a normal incandescent bulb. Even if it was replaced with a light bulb type LED, it was used as it was, and the glare zone countermeasure, which is the basis of lighting, was almost ignored. The problem to be solved by the present invention is to reduce the unpleasant glare of a light bulb type LED when used in a bare state.

Furthermore, depending on the lighting fixture in which the bulb-type LED is installed, there is an example in which the internal temperature of the scattering cover rises and adversely affects the heat-sensitive LED element. For example, when used in downlights, the radiant heat from the heat sink of a bulb-type LED heats the scattering cover itself via the dome-shaped reflector. The reason for this heat comes from the structure of the bulb-type LED, because the heat sink for heat dissipation corresponds to the constricted part of the glass bulb of the conventional incandescent bulb. In addition, the light bulb type LED of the initial type does not have good heat dissipation and the inside of the scattering cover also becomes hot, which reduces the life of the LED element, which is said to be nominally 40,000 hours, and actually lights up below half There were not a few examples that caused defects.

There was also a bulb-type LED that can emit negative ions. This is a device in which a cathode needle with a high voltage applied is placed at the center of the circuit board on which the LED elements in the scattering cover are placed, and the electrons are emitted from the holes in the scattering cover. Touching the molecule to form negative ions and bring about an air cleaning effect. Since this product is often used as a downlight or installed in a place where it is easy to enter a person's line of sight, such as a bathroom lighting, it has always been said to be a source of discomfort glare.

In order to solve the above problems, the present invention provides a heat sink having a base on the base end side, a top cover type scattering cover to be attached to the tip end side of the heat sink, and a light source member disposed inside the scattering cover. The scattering cover is formed integrally from the same material or combined with another part to form a composite, and from the top to the base of the scattering cover The scattering wall body wall 5 and the groove 18 circulate in a plurality of stepped installations, or a separate secondary scattering wall body wall designed to be arranged in an annular shape from above the scattering cover. When viewed from the side by reducing the brightness of the scattering cover by reducing the discomfort glare compared to the conventional simple dome-type scattering cover, and the scattering cover. Configured for high heat dissipation effect by increasing the surface area and gist bulb type LED to reduce the discomfort glare comprising.

  The brightness when viewed from the side by the scattering cover having the secondary scattering wall is surely lower than that of the conventional primary scattering cover, and there is an effect of reducing discomfort glare.

If a separate part colored transparently is used for the secondary scattering wall, not only the effect of reducing discomfort glare but also a new design element is added to the bulb-type LED.

The surface area of the conventional simple dome-shaped scattering cover is increased and the heat dissipation effect is enhanced.

Even in bulb-type LEDs that can emit negative ions, the reduction in discomfort glare is an improvement in performance.

  An embodiment of the present invention will be described with reference to FIGS. FIG. 1 is a schematic diagram showing a luminance distribution of a light bulb type LED 19 for reducing discomfort glare according to claim 1 of the present invention. The front view shows a cross section of only the scattering cover 2. FIG. 3 is a schematic view showing a light bulb type LED 19 for reducing discomfort glare according to claim 1 of the present invention, which has a secondary scattering wall body wall 5 formed in combination with another component. Again, the front view shows a cross section of only the scattering cover 2. FIG. 4 is a schematic view of a light bulb type LED 19 for reducing discomfort glare according to claim 1, which has a negative ion emission hole 13 at the top 8 of the scattering cover according to claim 2. The outer shape of FIG. 4 is almost the same as FIG. FIG. 2 is a schematic diagram showing the luminance distribution of a bulb-type LED 1 having a conventional dome-type cover 3, but the front view shows only the cross section of the scattering cover 2. In FIGS. 1, 3 and 4, the discomfort glare zone is set to about 45 degrees from the center of the base 7 of the scattering cover to the right and left to aim at reducing the luminance by the structure of the present invention. ☆ 彡 ☆ 彡 and ☆ 彡 ☆ 彡 ☆ 彡 15 are marks indicating high luminance, and ☆ and ☆☆ 16 are marks indicating luminance in which unpleasant glare is reduced by the structure of the present invention. In particular, ☆ 彡 ☆ 彡 ☆ 彡 15 is the brightness of the surface of the dome-shaped scattering cover 3 of the conventional light bulb-type LED 1, and in the present invention, this is used as a standard for unpleasant glare. Luminance measurement was made as data of a schematic diagram by measuring each major point from a position 50 cm away from the center of the top 8 of the scattering cover and 45 degrees left and right from the center of the top 8 of the scattering cover. From the measurement, ☆☆ 16 was about 70% brighter than ☆ 彡 ☆ 彡 ☆ 彡 15, and ☆ 16 was about 50%. This is represented as a luminance distribution in each of the corresponding schematic diagrams, and used as a design standard for reducing discomfort glare according to the present invention.

FIG. 1 shows a light bulb type LED 19 for reducing discomfort glare having a scattering cover 2 having a secondary scattering wall 5 integrally molded with a resin mold made of the same material, from the scattering cover top 8 to the scattering cover base 7. The secondary scattering wall body wall 5 and the groove 18 circulate. A polycarbonate resin is suitable as the resin material, and the pellets are colored milky white to facilitate scattering. This resin material is common to other embodiments. The height of the scattering cover 2 with the secondary scattering wall 5 is preferably up to about 80% of the diameter of the base 7 of the scattering cover, although it depends on the design. If the discomfort glare zone is set to 45 degrees from the center of the base 7 of the scattering cover to the left and right, the height is limited to achieve the purpose.

FIG. 3 shows an embodiment of the scattering cover 2 with the secondary scattering wall 5 of the light bulb-type LED 19 that reduces the discomfort glare formed in combination with other parts. A plurality of separate secondary scattering wall bodies 6 designed so as to be arranged on each other are installed by ultrasonic welding or the like. However, the separate secondary scattering wall bodies 6 may be milky white, for example, transparently colored. Since it is a separate part, an open shape like a morning glory can be obtained. In this case, the primary scattering cover 4 is preferably milky white.

FIG. 4 shows a light bulb type LED 19 for reducing discomfort glare according to claim 1, wherein a negative ion emission hole 13 is provided at the top 8 of the scattering cover according to claim 2. Except for the discharge hole 13, the outer shape of the figure is the same as FIG. Negative ions in the vicinity of the discharge hole 13 are indicated by 14. During energization, air is blown out from the discharge hole 13 provided in the scattering cover 2 by ion wind generated by Coulomb force. The size of the discharge hole 13 is a dimension regulated by electrical safety standards. It is preferable to use another part in the vicinity of the discharge hole 13, for example, a transparent colored part, since it also serves as an indicator of negative ion 14 emission.

The design of the scattering cover 2 of the light bulb-type LED 19 for reducing unpleasant glare according to the present invention can be obtained in many shapes within the scope of patent requirements. For example, a spiral secondary scattering wall 5 can be provided from the apex to the base. Thus, it does not necessarily have to be a simple annular wall. The height of the wall may be changed.

Discomfort glare from the side is reduced, and a light bulb-type LED 19 that reduces the discomfort glare having the scattering cover 2 with the secondary scattering wall 5 having a heat dissipation effect can be widely provided, and at the same time a new possibility is given to the luminaire design. Industrially useful.

The schematic diagram which shows the luminance distribution of the lightbulb type LED which reduces the discomfort glare of Claim 1 of this invention. The schematic diagram which shows the luminance distribution of the conventional simple dome shape scattering cover. It is a schematic diagram of the Example of the design combined with the another component of Claim 1 of this invention. It is a schematic diagram of the Example of Claim 2 of this invention.

1 Light bulb type LED
DESCRIPTION OF SYMBOLS 2 Scattering cover 3 Dome type scattering cover 4 Primary scattering cover 5 Secondary scattering wall body 6 Secondary scattering wall body of another part 7 Base part of scattering cover 8 Top part of scattering cover 9 LED element 10 Circuit board 11 Cathode needle 12 High voltage Generating portion 13 Emission hole 14 Negative ion 15 Mark indicating high luminance (more uncomfortable) ~ ☆ 彡 ☆ 彡, ☆ 彡 ☆ 彡 ☆ 彡 16 Mark indicating reduced luminance (reduced as it decreases) ~ ☆, ☆☆
17 Heat sink 18 Groove 19 Light bulb type LED to reduce unpleasant glare

Claims (2)

A bulb-type LED comprising a heat sink having a base on the base end side, a top cover type scattering cover to be attached to the distal end side of the heat sink, and a light source member disposed inside the scattering cover. The scattering cover is integrally formed of the same material or combined with different parts to form a plurality of steps, and has a plurality of steps that are installed from the top to the base of the scattering cover. Side by scattering walls wall 5 and the groove 18 is assumed to those either or to install multiple secondary scattering wall wall of another component that is designed to be arranged in an annular over the scattering cover orbiting and It is those reducing the discomfort glare by reducing the luminance of the scattering cover when viewed in comparison to the conventional simple domed scattering cover and, and heat radiation efficiency by increasing the surface area of the scattering cover Bulb-type LED to reduce the discomfort glare made configured such increases.   The light bulb type LED for reducing unpleasant glare according to claim 1, wherein a negative ion emission hole is provided at the top of the scattering cover.