JPH06349306A - Lighting fixture of led light source - Google Patents

Abstract

PURPOSE:To simplify the design of lens, and to make the lens cuts uniform so as to improve the appearance, by dividing a substrate in a form to make the intervals between LEDs and the lens even, and making the form of a housing corresponding to the divided form of the substrate. CONSTITUTION:A substrate is divided so as to install plural substrates 31 to 34 to steps 41 to 44 respectively, and the intervals of LEDs 2 loaded on the substrates, and a lens 5, are made in the same size. As a result, the lights radiated from the LEDs 2 reach to the lens 5 under the same condition actually. Consequently, the lens cuts 6 in order to form the light distribution property of the lens 5 are all in the same form, so as to simplify the design. And the uniformity of the brightness of the lens monitored from the outer side is improved.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a signal lamp such as a vehicle lamp, and more particularly to a lamp using an LED as a light source.

[0002]

2. Description of the Related Art FIG. 4 shows an example of the structure of a conventional lamp 90 of this type, such as a tail lamp or a brake lamp, and a lamp 91 is mounted on a single substrate 91 such as a printed circuit board. Enough LEs to cover the luminous area of
The D92s are arranged and mounted in rows and columns, and the board 9
1 is attached to the housing 93.
A lens 94 is provided in front of the housing 93. At this time, the LE is attached to the lens 94.
A lens cut 95 corresponding to D92 is provided.

[0003]

However, in the lamp 90 having the above-described structure, for example, the outer surface 9 of the lens 94 is used.
When the external light is reflected on 4a, if the surface of the lens 94 is flat, the entire surface will shine uniformly depending on the viewing direction, and it will be difficult to confirm the lighting state. Therefore, in order to prevent this state, Generally, the outer surface 94a of the lens 94 is formed as a curved surface, and accordingly, the inner surface 94b side is also formed as a curved surface.

Therefore, a dimensional difference occurs in the space between the LED 92 and the lens 94 depending on the location, which causes a difference in appearance when viewed through the lens 94. Therefore, in order to correct this. Since the lens cut 95 has to be adjusted such that the lens cut 95 has a different curvature depending on the location, the design of the lens 94 is extremely complicated.

In the above adjustment, for example, when the LED 92 has a lead wire, the amount of the lead wire to be inserted into the substrate 91 may be adjusted to keep the distance from the lens 94 constant. Although conceivable, in this case, there is a problem that the work of mounting the LED 92 on the substrate 91 becomes extremely complicated. Further, recently, in order to omit the work of inserting the lead wire, an LED 92 having a shape called a surface mounting type and closely attached to the surface of the substrate 91 as shown in FIG. 5 is adopted, and the above means cannot be applied. Resolving these points is an issue.

[0006]

The present invention is, as a concrete means for solving the above-mentioned conventional problems, mounted on a substrate in a predetermined number and array within the light emitting area of a lamp and fixed to a housing. In a lamp having an LED as a light source and a lens formed as a curved surface, the substrate is the L
Each of the EDs is divided into a shape capable of equalizing the distance between the ED and the lens, the housing has a shape corresponding to the divided shape of the substrate, and each of the divided substrates is divided. It is an object of the present invention to solve the problem by providing a lamp of an LED light source in which the LED mounted on the LED is provided with a stepped portion that makes the interval between the LED and the lens equal.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, the present invention will be described in detail based on an embodiment shown in the drawings. In this embodiment as well, the lamp will be described as an example of a vehicle lamp. Reference numeral 1 in FIGS. 1 and 2 denotes a vehicle lamp. In this embodiment, for ease of understanding, the vehicle lamp 1 will be described as having a circular outer shape. Further, the vehicle lamp 1 is similar to the conventional example in that the LED 2 is mounted on the substrate 3, and the substrate 3 is fixed to a predetermined position of the housing 4.

Here, in the vehicular lamp 1, the outer surface 5a is curved, for example, in a convex spherical shape so that the entire surface of the lens 5 does not shine due to external light as described above. The inner surface 5b is also curved in the same manner, and when the substrate 3 is formed as a single sheet, the LED 2 mounted on the substrate 3 is in a state in which the distance between the LED 2 and the lens 5 varies depending on the location. There is.

In view of the above, according to the present invention, the substrate 3 is divided. When this division is performed, for example, the inner surface 5b of the lens 5 is equally spaced on the basis of the position of the substrate 3 when formed as one sheet. Assuming, for example, three contour lines t1, t2, t3 so that
Since t3 is a concentric circle, if the substrate 3 is divided along the contour lines t1 to t3, the four substrates of the first substrate 31, the second substrate 32, the third substrate 33, and the fourth substrate 34 can be obtained. Becomes

Here, in the present invention, the first substrate 3 is used.
1, the second substrate 32, the third substrate 33, and the fourth substrate 34 are shown in FIG.
As shown in FIG. 4, four sheets are connected to each other through the intermittent cut groove 35 to be integrally formed, and for example, separation is performed when the LED 2 is mounted on the housing 4 after being mounted. .

This is because it is easy to ensure the quality when the vehicle lamp 1 is assembled, and one set for an integrated lamp is connected so that it can be mounted on, for example, a substrate. It is also possible to manage the total amount of light of the LEDs 2, and this makes it easy to manage the variation in the brightness between the completed vehicular lamps 1 within a predetermined range in advance, which is extremely effective for quality improvement.

In the present invention, the housing 4 is provided with four steps 41 to 44 (see FIGS. 1 and 2). At this time, for example, the first substrate 31 is provided in the steps 41. However, the second substrate 32 is in the step portion 42, the second substrate 33 is in the step portion 43, and the second substrate 34 is in the step portion 44.
As described above, each stepped portion and each substrate are formed in a shape that allows corresponding mounting.

In addition, the step portions 41 to 44 are mounted on the board 32 mounted on the step portion 42 and the distance from the LED 2 mounted on the board 31 mounted on the step portion 41 to the lens 5. The distance from the LED2 to the lens 5,
Similarly, the respective heights are set so that the distance from the LED 2 to the lens 5 on the substrate 33 and the distance from the LED 2 to the lens 5 on the substrate 34 are all the same.

Next, the operation and effect of the present invention having the above-described structure will be described. The substrate 3 is divided, and the divided substrates 31 to 34 are respectively stepped portions 41 to 44.
The LED 2 and the lens 5 mounted on these substrates have the same distance between them, so that each of the L
The light emitted from the ED 2 reaches the lens 5 under substantially the same conditions.

Therefore, the same lens cut 6 may be used for forming the light distribution characteristic on the lens 5, and the lens design is greatly simplified. In addition, the fact that the incident conditions are the same and the lens cuts 6 are also the same means that the optical conditions for all the LEDs 2 are the same, and thus the uniformity of the luminance of the lens when viewed from the outside is uniform. Will be improved.

Further, according to the present invention, the substrate 3 is provided with the housing 4
Since the board 3 is divided at the time of mounting to the vehicle lamp 1, it is possible to manage each of the vehicle lamps 1 as a unit, thereby making it possible to make the quality of the vehicle lamp 1 after completion uniform. It is a thing.

[0017]

As described above, according to the present invention, the substrate is divided into a shape that allows the LEDs to be equally spaced from the lens, and the housing is divided into the above-mentioned shapes. According to the above, and the LED mounted on each of the divided substrate is a vehicle lamp of the LED light source provided with a stepped portion having an equal interval to the lens, Even in a vehicular lamp that employs a curved lens, the distance between the lens and the LED is made uniform, which makes the lens cut the same on the lens side, thereby simplifying the lens design and cutting the lens. The appearance is improved by equalizing
It is extremely effective in reducing costs and improving performance.

Further, according to the present invention, the board is divided at the time of attachment to the housing, so that the board can be managed separately for each vehicle lamp, and thus the quality of the vehicle lamp after completion can be improved. It also has an extremely excellent effect on the improvement of.

[Brief description of drawings]

FIG. 1 is a perspective view showing an embodiment of a vehicular lamp according to the present invention in a partially broken state.

FIG. 2 is a sectional view taken along the line AA of FIG.

FIG. 3 is a plan view showing a substrate of the same example.

FIG. 4 is a cross-sectional view showing a conventional example.

FIG. 5: LED used as a light source in this type of lamp
It is a perspective view showing an example of.

[Explanation of symbols]

 1 ... Vehicle lamp 2 ... LED 3 ... Substrate 31 ... First substrate 32 ... Second substrate 33 ... Third substrate 34 ... Fourth substrate 4 ... Housing 41, 42, 43, 44 ... … Steps 5 …… Lens 5a …… Outer surface 5b …… Inner surface 6 …… Lens cut

Claims (2)

[Claims] 1. LEDs mounted on a substrate in a predetermined number and array within a light emitting area of a lamp and fixed to a housing.
In a lamp in which the lens is formed as a curved surface, the substrate is divided into a shape that allows each of the LEDs to have an equal interval with the lens,
The housing is provided with a step portion having a shape corresponding to the shape of the division of the substrate, and the LEDs mounted on each of the divided substrates having equal intervals with the lens. An LED light source lamp characterized by: 2. The LED light source according to claim 1, wherein the substrate is formed as one sheet provided with a dividing means such as a kerf, and the dividing is performed after the LED is mounted. Lights.