JPH04359483A - Led lamp and lighting tool for vehicle using same - Google Patents

Abstract

PURPOSE:To prevent loss of quality of light when a title item is used as a lighting tool for vehicle by making colorless, transparent an effective portion where an effective flux of light from an LED chip of a resin mold case is transmitted and by providing a dark-colored portion at least over an entire surface of the mold case on a section which crosses a light axis of the LED lamp at a portion other than the effective portion. CONSTITUTION:A dark-colored portion 22 is provided over an entire surface of a section of an ineffective portion 2C. Therefore, when observing from a tip side, namely a side where a focusing lens 2a is installed when an LED lamp 1 is not ON, a dark-colored portion 21 can be observed through the focusing lens 2a and an LED lamp 1 can be monitored in a tint pigment to the dark- colored portion 21. On the other hand, when the LED 1 is lit, no light from an LED chip 4 is lost, thus reaching the focusing lens 2a since an effective portion 2b is formed by a colorless and transparent resin member. Then, a light is radiated from the focusing lens portion 2a toward an outside of the LED lamp 1.

Description

[Detailed description of the invention]

0001

[Industrial Application Field] The present invention relates to an LED lamp and its L
This relates to a vehicle lamp that uses an ED lamp as a light source, and in detail, L is suitable when a design that allows the lens surface of the lamp to be viewed as a dark color when not emitting light is required.
The present invention relates to an ED lamp and a vehicle lamp using the LED lamp as a light source.

0002

2. Description of the Related Art FIG. 3 shows an example of a conventional vehicle lamp 90 in which the surface of the lens 91 is viewed as a dark color when not emitting light. A lens 91 is formed of a transparent member, and an LED lamp 92 having a red or colorless transparent resin mold case 92a is disposed on the back side of the lens 91. At the same time, a printed circuit board 93 on which this LED lamp 92 is mounted is also connected to the lens 91. By doing so, the vehicle lamp 90 is viewed as red due to the light emitted from the LED lamp 92 when it is on, and when it is not emitting light, it is seen in the color colored on the lens 91. It becomes something to be observed.

0003

[Problems to be Solved by the Invention] However, in the conventional vehicle lamp 90 described above, when the light is turned on, the
The light from the ED lamp 92 passes through the lens 91, which is colored to the extent that the inside of the vehicle lamp 90 cannot be seen through when it is not lit, so when passing through the lens 91, a considerable amount of light is lost and the vehicle A problem arises in that the lamp 90 becomes very dark.

[0004] Furthermore, in order to solve this problem, the above-mentioned L
When the driving current of the ED lamp 92 is increased, new problems such as deterioration of the LED lamp 92 over time or disconnection occur due to this, and in any case, this type of conventional vehicle lamp 90 has a fundamental problem. There was no way to solve the problem, and solving this problem became a problem.

[0005]

[Means for Solving the Problems] As a specific means for solving the above-mentioned conventional problems, the present invention provides an LED lamp in which an LED chip is sealed with a resin mold case. The effective part through which the effective light beam from the LED chip passes is colorless and transparent, and the part other than the effective part has a dark colored part covering at least the entire surface of the resin molded case in a cross section perpendicular to the optical axis of the LED lamp. There is provided an LED lamp characterized in that the interior of the housing is colored in a similar color to the dark colored part of the LED lamp, and the lens is colorless and transparent. By providing a vehicle lamp using the LED lamp described in Item 1, the above-mentioned conventional problems are solved.

[0006]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, the present invention will be explained in detail based on an embodiment shown in the drawings. What is indicated by the reference numeral 1 in FIG. 1 is an LED lamp according to the present invention, and this LED lamp 1 is different from the conventional one in that an LED chip 4 mounted on a lead frame 3 is sealed in a resin molded case 2. Although it is similar to the example, according to the present invention, a dark colored portion 21 is provided in a predetermined portion of the resin molded case 2.

[0007] Here, to explain the resin mold case 2 in more detail, this resin mold case 2
is formed by injecting, for example, epoxy resin into a mold in which the LED chip 4 mounted on the lead frame 3 is held at a predetermined position, and hardening the resin. A condensing lens portion 2a having a convex spherical surface is formed at the tip to efficiently radiate light from the LED chip 4 in a predetermined direction.

In the LED lamp 1 configured as described above, in practice, only the light emitted from the LED chip 4 that passes through the resin mold case 2 and reaches the condenser lens portion 2a is effectively used. The effective part 2b, which becomes an effective light flux and through which this effective light flux passes, is formed of a colorless and transparent resin member, and the dark colored part 21 of the present invention is provided in the ineffective part 2c, which is a location other than the effective part 2b. There is.

At this time, when the dark colored portion 21 is provided in the ineffective portion 2c, it is perpendicular to at least the optical axis Z connecting the LED chip 4 of the resin molded case 2 and the center of the condensing lens portion 2a. It is provided over the entire surface of the cross section, and is colored in a dark color such as blue or green, as described in the case of the conventional lens, but it is provided in the invalid portion 2c. As a result, the dark colored portion 21 can be transparent or opaque.

[0010] To explain the specific manufacturing means for manufacturing the LED lamp 1 of the present invention, the lead frame 3 is placed in a mold for forming the resin mold case 2.
hold the LED chip 4 mounted in a predetermined position,
The desired LED lamp 1 is obtained by injecting a colorless and transparent epoxy resin until the LED chip 4 is buried, and then injecting the epoxy resin colored in the dark color described above.

[0011] Next, the function and effect of the LED lamp 1 of the present invention having the above-described structure will be explained. As described above, the dark colored part 21 is provided over the entire cross section of the ineffective part 2c. When this LED lamp 1 is viewed from the tip side when not lit, that is, from the side where the condensing lens section 2a is provided, the dark colored section 21 is viewed through the condensing lens section 2a. As a result, the LED lamp 1 is viewed in the color of the dark colored portion 21.

However, when the LED lamp 1 is turned on, since the effective portion 2b is formed of a colorless and transparent resin member, the light from the LED chip 4 passes through the condenser lens without being impaired in the slightest. Reaching part 2a,
The light is emitted to the outside of the LED lamp 1 from this condensing lens portion 2a.

[0013] In actual practice, all of the ineffective portions 2c may be colored or, if necessary, the ineffective portions 2c may be painted in a predetermined color to further enhance the action and effect. It is possible to make appropriate changes such as increasing the value.

FIG. 2 shows a vehicle lamp 10 according to the present invention, and this vehicle lamp 10 employs the above-mentioned LED lamp 1 according to the present invention as a light source. All of the interior of the housing 12 that is viewed through the lens 13, such as the printed circuit board 11 placed in a predetermined position or the inner wall 12a of the housing 12, has the same color as the dark colored portion 21 of the LED lamp 1. The lens 13 is colored, and at the same time, the lens 13 is made colorless and transparent.

Next, the functions and effects of the vehicle lamp 10 of the present invention having the above structure will be explained.The LED lamp 1 is adopted, and the inside of the housing 12 is colored in a similar color to the dark colored part 21. Therefore, when viewing the vehicle lamp 10 from the lens 13 side when it is not lit,
The LED lamp 1 and the inside of the housing 12 are viewed in the same dark color, such as blue, through the colorless and transparent lens 13. In other words, the entire surface of the vehicle lamp 10 is viewed in a dark color, achieving the objective. Become.

However, once the LED lamp 1 is turned on, as described above, the LED lamp 1 shines in red without any attenuation of brightness, and furthermore, the lens 13 is formed as colorless and transparent. Therefore, this lens 13 also does not cause attenuation.

[0017]

Effects of the Invention As explained above, according to the present invention, at least the entire surface of the resin molded case is covered with a cross section perpendicular to the optical axis of the LED lamp, except for the part of the resin molded case through which the effective luminous flux from the LED chip is transmitted. The present invention provides an LED lamp that is provided with a dark colored part extending over the length of the LED lamp, and in addition, the inside of the housing is colored in a similar color to the dark colored part of the LED lamp, and the lens is colorless and transparent. By providing vehicle lighting,
In both LED lamps and vehicle lights, although they appear dark when not lit, they are L when lit.
As a product that does not attenuate the amount of light from the ED chip in the slightest, it has an extremely excellent effect that allows us to provide products that meet the demands of the market without causing any problems with the brightness or lifespan of this type of lighting equipment. It is something.

[Brief explanation of the drawing]

FIG. 1 is a sectional view showing an embodiment of an LED lamp according to the present invention.

FIG. 2 is a sectional view showing an embodiment of a vehicle lamp according to the present invention.

FIG. 3 is a sectional view showing a conventional example.

[Explanation of symbols]

1...LED lamp, 2...Resin mold case, 2a
...Condensing lens part, 2b... Effective part, 2c... Ineffective part,
21... Dark colored part, 3... Lead frame, 4... L
ED chip, 10... Vehicle lamp, 11... Printed circuit board, 12... Housing, 12a... Inner wall, 13... Lens, Z... Optical axis

Claims (2)

[Claims] 1. In an LED lamp in which an LED chip is sealed with a resin molded case, an effective part of the resin molded case through which the effective light beam from the LED chip passes is colorless and transparent, and a part other than the effective part is made transparent. An LED lamp characterized in that the part is provided with a dark colored part covering at least the entire surface of the resin mold case in a cross section perpendicular to the optical axis of the LED lamp. 2. The vehicular lamp using an LED lamp according to claim 1, wherein the inside of the housing is colored in a similar color to the dark colored portion of the LED lamp, and the lens is colorless and transparent.