JP3151370U - LED bulb - Google Patents

Abstract

An LED bulb that can be manufactured at a reduced cost and reduced in size is provided. In a light bulb having a light emitting part, a base, and a cover that covers a light emitter, the light emitting part is mounted with chip-type LEDs on the front and back surfaces of a substrate that is mounted vertically in the cover, The LEDs are horizontal irradiation type LEDs 2b and 2c that irradiate in the horizontal direction with respect to the substrate to be mounted, and vertical irradiation type LED 2a that irradiates in the vertical direction with respect to the substrate. It was mounted on the substrate in the front-rear direction and the direction of irradiating the top. The substrate can be supported by the substrate support 6 provided inside the cover or / and the base 3. The LED mounted on the substrate was wired to the base and the electrode 4 through the circuit wiring of the substrate or by a lead wire. [Selection] Figure 1

Description

  The present invention relates to a light bulb using an LED as a light source, and is suitable for use in place of various single spheres such as a vehicle width lamp, a license lamp, a parking lamp, a stop lamp, a back lamp, a room lamp, and a blinker lamp of an existing automobile. It is.

  Various double spheres including the single sphere are used in automobiles. Since these bulbs have various problems such as short life, easy heat generation, and high power consumption, in recent years, bulbs using LEDs having various advantages such as low power consumption and long life have been developed. Widely used in various fields. However, since the LED has directivity in the irradiation direction and the irradiation angle is narrow, there is a problem that it is difficult to illuminate all directions from the side to the top of the spherical bulb with a single light bulb. As an illuminating tool for solving such a problem, an LED bulb in which a plurality of LEDs are mounted on the outside of a cylindrical mounting tool has been proposed (Patent Document 1).

JP 2008-103112 A

  The LED light bulb described in Patent Document 1 compensates for the narrowness of the irradiation angle by arranging a plurality of LEDs on a cylindrical fixture in all directions (all directions) from the side to the top. Although all directions from the side to the top of the bulb can be illuminated, there are problems that the number of LEDs used is high and the cost is high, and it is not suitable for small light bulbs.

  The problem to be solved by the present invention is to provide a small-sized LED bulb that can suppress the manufacturing cost, can be uniformly illuminated from the side to the top with a small number of LEDs, and can be uniformly illuminated.

  The LED light bulb of the present invention is a light bulb provided with a light emitting part, a base, and a glass bulb (cover) covering the light emitting body, and the light emitting part is provided on each of the front and back surfaces of the substrate mounted vertically in the cover. A chip type LED is mounted, and the LED is a horizontal irradiation type LED that irradiates the substrate to be mounted in a horizontal direction, and a vertical irradiation type LED that irradiates the substrate in a vertical direction. The LED is mounted on the substrate in the direction of irradiation to the side and the direction of irradiation in the upward direction of the cover, and the vertical irradiation type LED is mounted on the substrate in the direction of irradiation in the front-rear direction of the cover. The substrate can be stabilized by supporting the substrate with a substrate support provided in a base or / and a cover. The LED mounted on the substrate was wired to the base and the electrode via the circuit wiring of the substrate or by a lead wire.

Since the LED bulb of the present invention has the above-described configuration, the following effects are provided.
(1) Since the front and rear of the cover, both the left and right sides, and the upper direction (all directions of the cover sphere) can be illuminated with a small number of LEDs, it is possible to reduce the size of the substrate and the light bulb and reduce the cost.
(2) By making the number and arrangement of the horizontal irradiation type LEDs and the vertical irradiation type LEDs mounted on the front and back surfaces of the board equal or substantially equal, the front and back sides of the board can be illuminated equally or substantially evenly. .
(3) Since the LED is mounted on a substrate having circuit wiring, the wiring between the LED, the base and the electrode can be performed through the substrate, wiring is easy, and the inside of the cover is simplified.

(A) is an external view which shows one Example of the LED bulb of this invention, (b) is the top view. In the LED bulb of the present invention, chip-type LEDs are vertically mounted on both front and back surfaces of a substrate, (a) is a front perspective view, (b) is a rear perspective view, (c) is a right side view, ( d) is a plan view. In the LED bulb of the present invention, chip-type LEDs are mounted horizontally on both front and back sides of a substrate, (a) is a front perspective view, (b) is a rear perspective view, (c) is a right side view, ( d) is a plan view.

(Embodiment 1)
A first embodiment of the LED bulb of the present invention will be described with reference to FIG. The LED light bulb of FIG. 1 has three chip LEDs mounted on the front surface 1a of the resin substrate 1 and two chip LEDs mounted on the back surface 1b. Each chip LED is connected to the circuit wiring provided on the substrate 1. Connected to the base (-electrode) 3 and the electrode (+ electrode) 4 through the circuit wiring, and is connected to the substrate 1 by the cover 5 provided above the base 3 and the chip type LED mounted thereon. Is covered.

  The substrate 1 is a vertically long rectangular thin plate, the front and back surfaces 1a and 1b are mounting surfaces on which a plurality of chip-type LEDs can be mounted, and the front and back surfaces 1a and 1b are provided with circuit wiring with a conductive material. . The substrate 1 can be an existing or new printed circuit board. The substrate 1 is not limited to a quadrangle, and may have a desired shape such as a triangle, pentagon, star, circle, or elongated shape. In any case, a width (area) where at least two or more chip-type LEDs can be mounted is required on each surface.

The chip-type LED can be an existing one or a new one. The chip type LED used in the present embodiment is a vertical irradiation type LED 2a (FIGS. 1A and 1B) that emits light (irradiates) perpendicularly to the substrate 1 to be mounted, and the substrate 1 to be mounted. It is horizontal irradiation type | mold LED2b and 2c (FIG.1 (c)) which light-emits (irradiates) a horizontal direction. In the present invention, these chip-type LEDs having different light emitting directions are attached to the front surface 1a and the back surface 1b of the substrate 1, and the light emitted from these chip-type LEDs is omnidirectional (both left and right sides: FIG. 1 (b) ) Y ₁ and Y ₂ directions, both front and rear directions: FIG. 1 (b) X ₁ and X ₂ directions, upper direction: FIG. 1 (a) Z direction) can be illuminated.

There are various chip-type LED arrangement (mounting) methods for irradiating light in all directions of the cover 5, and one example will be described with reference to FIGS. In this embodiment, one of the mounting surface 1a of the substrate 1, in the direction vertical illumination type LED2a is irradiated in FIG 2 (a) (c) Y 1 direction (d) (the left side of the cover 5), horizontal illuminated LED2b is in the direction of irradiating Figure 2 (a) X ₁ direction (d) (front cover 5), a horizontal irradiation type LED2c upper Z-direction (the cover 5 in FIG. 2 (a) (c) ) is in the orientation respectively implementations for irradiating the irradiation, the other of the mounting surface 1b of the substrate 1, the vertical illumination type LED2a within Y ₂ direction (right side of the cover 5) in FIG. 2 (b) (c) (d) in the direction in which the horizontal irradiation type LED2b in the direction of irradiation are respectively mounted on the X ₂ direction (rear cover 5) of FIG. 2 (b) (d).

  The arrangement of the chip-type LEDs is merely an example, and other arrangements can be used. For example, the horizontal irradiation type LED 2c directed in the Z direction in FIGS. 2A and 2C can be mounted not only on one mounting surface 1a but also on the other mounting surface 1b. The number of chip-type LEDs to be mounted can be set to an arbitrary number according to the required light emission amount of the LED bulb. For example, the number of chip-type LEDs can be doubled, tripled, or the like. Also in this case, it is preferable to arrange the spherical cover 5 in a combination that can ensure uniform emission in all directions.

  The substrate 1 can be supported by a substrate support 6 (FIG. 1A). The substrate support 6 shown in FIG. 1 is disposed inside the base 3 and has a shape of a box having an upper opening so that the substrate inserted from the upper opening can be supported (fixed). The substrate support 6 is connected to the base 3 and the electrode 4 (both in FIG. 1A) via lead-in wires (lead wires). With this, when the substrate 1 is supported by the substrate support 6, the substrate 1 The circuit wiring and the lead wire are electrically connected, and the chip type LED mounted on the substrate 1 is electrically connected to the base 3 and the electrode 4 through the circuit wiring of the substrate 1. The shape of the substrate support 6, the substrate support structure, and the like can be other shapes and structures as long as the substrate 1 can be supported. The substrate support 6 may not be provided when the substrate 1 can be fixed to another member such as the base 3.

  The base 3 can be used in various shapes and standards. However, if an existing standardized bulb base is used, it can be conveniently fitted and screwed into an existing socket.

  The cover 5 is made of glass, but may be made of resin such as acrylic. When it is made of resin, coloring is easier than in the case of glass. Although the cover 5 can be used in various shapes and standards, the use of the existing standardized cover 5 is convenient because it can be attached to the inside of an existing case or lens.

(Embodiment 2)
A second embodiment of the LED bulb of the present invention will be described with reference to FIG. The structure of the LED bulb of this embodiment is basically the same as that of the LED bulb of the first embodiment. The difference is the mounting arrangement of the chip-type LEDs on the substrate 1, which are arranged in the horizontal direction on each of the mounting surfaces 1a, 1b, and the details of the arrangement are as follows.

On one of the mounting surface 1a, in the direction horizontal illuminated LED2b irradiated to FIG 3 (a) X ₁ direction (d) (front cover 5), a horizontal illuminated LED2c Figure 3 (a) (c) in a direction to irradiate the Z direction (upper cover 5), the vertical illumination type LED2a is implemented in a direction to irradiate the Y ₁ direction (left side of the cover 5) of FIG. 3 (a) (c) (d), the orientation in the other mounting surface 1b is horizontal illuminated LED2b irradiated to FIG 3 (b) X ₂ direction (d) (rear cover 5), FIG. 3 is a vertical illuminated LED2a (b) (c) ( and the direction of irradiating the Y ₂ direction d) (right side of the cover 5) are mounted. Thereby, the LED light bulb which can illuminate all directions (front-rear, left-right, upper direction) of the cover 5 similarly to the case of Embodiment 1 can be obtained.

(Other embodiments)
The arrangement method of the LEDs 2a, 2b, and 2c shown in the embodiment is also an example, and other arrangements may be used as long as an LED bulb that can illuminate all directions of the cover 5 is obtained. In any arrangement, the mounting position, mounting interval, mounting direction, mounting number, and the like of the chip-type LEDs on the mounting surfaces 1a and 1b can be arbitrarily selected.

(Industrial applicability)
The LED bulb according to the present invention can be used for various purposes, for example, vehicle lamps such as automobiles and motorcycles, guide lights such as passages and stairs, flashlights, indoor lights, street lights, traffic lights, lighting for fixtures, etc. It can be used by being mounted on a lighting fixture.

1 Substrate 1a Surface (mounting surface)
1b Back side (mounting side)
2a Vertical irradiation type LED (chip type LED)
2b Horizontal irradiation type LED (chip type LED)
2c Horizontal irradiation type LED (chip type LED)
3 Base 4 Electrode 5 Cover 6 Substrate Support

Claims (3)

  In a light bulb having a light emitting part, a base, and a spherical cover that covers the light emitter, the light emitting part is mounted with a chip-type LED on each of the two mounting surfaces of the substrate mounted vertically in the cover. Is a horizontal irradiation LED that irradiates the mounted substrate in the horizontal direction and a vertical irradiation LED that irradiates the substrate in the vertical direction. The horizontal irradiation LED and the vertical irradiation LED are on the left and right sides of the cover. And an LED bulb mounted on a substrate in such a direction as to irradiate the front-rear direction and the upper direction.   2. The LED bulb according to claim 1, wherein a substrate support that can support the substrate is provided inside the cover or / and the base.   3. The LED bulb according to claim 1, wherein the LED mounted on the substrate is wired to the base and the electrode through a circuit wiring of the substrate or by a lead wire.

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