JP2003086007A - Lamp for vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make light emission from a plurality of light sources 4 arranged in a line through a lens 5 not dotted but continuous in a high mount stop lamp 1. SOLUTION: The lens 5 through which one light source 4 emits light is a lens aggregate body formed by cutting a plurality of lens surfaces lengthwise and crosswise. A center side lens has a concave lens shape and an outer circumference side lens has a convex lens shape to reduce brightness of light passing through the center side lens surface and to increase brightness of the light passing through the outer circumference side lens surface. Consequently, light emission gets continuous as a whole.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention belongs to the technical field of vehicle lamps such as high mount stop lamps.

[0002]

2. Description of the Related Art Today's vehicles are equipped with various types of lamps such as side blinkers, room lamps, headlamps, rear combination lamps, side blinkers for door mirrors, and high mount stop lamps. In the case of a lamp, a plurality of light sources (LEDs, etc.) are arranged in a row in a row, and the light emitted from the light sources is radiated through a lens surface assembly in which a plurality of rows of lens surfaces are cut vertically and horizontally. There are things I tried to do.

In the conventional lens, when the light source is viewed through the cut lens surfaces, the image of the light source seen through the lens surface on the outer peripheral side far from the light source is more visible than that seen through the lens surface on the center side. It looked small, or at most the same size. Therefore, when the light source is turned on, the irradiation seen through the entire lens is dark as shown in the photograph of FIG. 9 in the part far from the optical axis of the light source, and only scattered irradiation is performed. There is a problem of being bad. In order to solve this, it is sufficient to narrow the interval between the light sources and perform continuous irradiation. However, there is a problem that the number of light sources to be used increases in this case. There is a problem to be solved.

[0004]

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances in order to solve these problems, and a plurality of light sources are arranged in a row and each of the light sources is arranged. When the lens provided opposite to the lens is an assembly of lens surfaces formed by cutting a plurality of lens surfaces around the optical axis position of the light source, the outer lens when the light source is viewed through the lens. The vehicle lamp is characterized in that the light source image seen on the surface is set to be larger than the light source image seen on the inner lens surface. With this configuration, the brightness of the outer lens surface can be ensured in the same manner as the brightness of the inner lens surface, and a continuous irradiation state can be ensured without narrowing the distance between the light sources. . In this structure, the size of the light source seen from the outer lens surface is substantially the size of the light source itself, and the size of the light source seen from the inner lens surface is set to be reduced. ,
This ensures continuous irradiation. In these, the outer lens surface can be characterized as a prismatic lens or a convex lens, and the central lens can be a concave lens. In such a case,
Continuous irradiation can be achieved with a simple structure. These can be characterized in that the cut of the lens surface on the side far from the light source is made larger so that light having a small angle with the optical axis of the light source can enter. In the case of, even if the lens surface is far from the light source, the required brightness can be more efficiently secured.

[0005]

BEST MODE FOR CARRYING OUT THE INVENTION Next, embodiments of the present invention will be described based on the drawings. In the drawings, 1
Is a high mount stop lamp, and the lamp 1
Is a case body 2 formed of a translucent resin material, a substrate 3 mounted on the rear side of the case body 2, and a light source that is planted in a horizontal row in the substrate 3 with a predetermined gap. The case body 2 is formed of a pair of upper and lower plate materials and is long in a horizontal single letter shape, and the front surface through which the light from the light source 4 passes is an arc shape (substantially a semi-cylindrical shape). Shaped lens 5
The lens surface described later is cut on the inner surface.

The cut of the lens 5 is formed corresponding to each one of the light sources 4. Now, focusing on one light source 4, the cut will be five in the vertical direction and seven in the horizontal direction. One lens surface, that is, a lens surface of 35 is cut and formed as 5 rows and 7 columns. And now, for the sake of explanation, these cut lens surfaces are numbered,
For convenience, the horizontal direction is indicated by the address x, and the vertical direction is indicated by the address y, and displayed at the (x, y) address. Then, with the lens surface facing the optical axis directly facing the light source 4 as the center, the address is given as (0, 0), and the lens surface shifted by m to the right is taken as (m, 0). , The lens surface shifted by m to the left side is (-m, 0), the lens surface shifted by n to the upper side is (0, n), and the lens surface shifted by n to the lower side is (0,-).
n) and address respectively.

In the present embodiment, of the lens surfaces, the outermost one, that is, the uppermost lens surface (-
3, 2) to (3, 2), two lens surfaces (-3, 1) and (3, 2) in the second stage from the top, and a lens surface (-3, 0) at the center in the vertical direction. ) And (3, 0), two lens surfaces (-3, -1) and (3, -1) in the second stage from the bottom,
And the lens surfaces (-3, -2) to (3, -2) at the bottom
As shown in FIG. 6, each of the 20 lens surfaces consisting of 7 is a prismatic lens and the size of the image is almost unchanged, or it is a convex lens and the image is large. On the other hand, the remaining 15 lens surfaces on the inner side of these are all set to be concave lenses so as to form a small image, and when the light source 4 is viewed through the lens 5, as shown in FIG. The light source 4 is seen to be approximately the actual size on each of the lens surfaces on the outer peripheral side, whereas the size of the light source 4 is set to appear to be reduced on the inner lens surface. The lens surface is structured so as to have an image larger than the inner lens surface, and the brightness of the light irradiated through each lens surface is adjusted to a certain level. In other words, although the brightness of the light source on the center side is large, the brightness of the light transmitted through the lens surface is suppressed by making the image small, and the peripheral part is made close to the real image to suppress the decrease in brightness. By doing so, the brightness of the light transmitted through the respective lens surfaces is made uniform as much as possible, and the whole is set to be the same. The lens surface is determined by the relationship between the inner surface, which is the entrance surface, and the outer surface, which is the exit surface, of each lens surface. If an image larger than the central portion is formed, the outer peripheral portion should be a concave lens. It goes without saying that it is good.

Further, in this structure, although the seven lens surfaces of the uppermost lens surfaces (-3, 2) to (3, 2) are prismatic lenses or convex lenses, the distance from the light source 4 and the irradiation angle are , So that the cut of the lens surface on the side far from the light source 4 is set to be larger (longer) so that bright light with a small angle with the optical axis of the light source 4 can be received. In this way, it is possible to ensure the required brightness even on the lens surface of the corner address far from the light source 4. The same consideration is given to the lens surfaces (-3, -2) to (3, -2) at the bottom.

In the embodiment of the present invention configured as described above, the light sources 4 are arranged in a row in a row and the lamps are provided with the lenses 5 cut corresponding to the respective light sources 4, Each of the cut lens surfaces has a prism-shaped lens or a convex lens on the outer peripheral side and a concave lens on the inner side. As a result, as shown in the photograph in FIG. 8, light of high brightness is transmitted near the optical axis of the light source 4. It is observed as narrowed light on the lens surface, but on the outer lens surface, it is observed as greatly expanded light, whereby the lenses 5 corresponding to the respective light sources 4 extend to the outer peripheral portion. Since it illuminates well and is arranged in a horizontal line, it is possible to secure irradiation in a continuous state without narrowing the interval between the light sources 4 and improve visibility. In some cases, continuous irradiation can be ensured even if the distance between the light sources is wider than before.

In this structure, the lens surface on the outer peripheral side is a prism lens or a convex lens to enhance the brightness, but the lens surface on the side far from the light source 4 is set to have a larger (longer) cut. It is designed so that bright light with a small angle with the optical axis of the light source 4 can enter as much as possible, so that the required brightness can be secured even on the lens surface of each address far from the light source 4. It can contribute to the improvement of continuous irradiation.

Of course, the present invention is not limited to the above-mentioned embodiment, and when the light source is viewed through the lens, the light source looks larger as the distance from the light source to the lens surface increases. It can be set in three stages or more, and by doing so, more continuous irradiation can be achieved. Further, the present invention can be implemented not only with one row of light sources but also with two rows or more rows.

[Brief description of drawings]

1A is a front view of a high mount stop lamp, and FIG. 1B is a cross-sectional side view of the high mount stop lamp.

FIG. 2 is a front view of a main part of a high mount stop lamp.

3A to 3C are cross-sectional views taken along the lines AA to CC in FIG.

4 (D) and (E) are sectional views taken along lines DD and EE in FIG.

5 (F) to (I) are sectional views taken along lines FF to II of FIG.

6 is an explanatory enlarged view showing a light transmitting state of a cross section taken along the line AA of FIG.

FIG. 7 is a front view showing a state when a light source is viewed through a lens.

FIG. 8A is a photograph showing an irradiation state of a high mount stop lamp according to the present invention, and FIG. 8B is an enlarged photograph thereof.

FIG. 9 (A) is a photograph showing an irradiation state of a conventional high mount stop lamp, and FIG. 9 (B) is an enlarged photograph thereof.

[Explanation of symbols]

1 High mount stop lamp 2 case body 4 Light source (LED) 5 lenses

Claims (4)

[Claims] 1. A set of lens surfaces formed by arranging a plurality of light sources in a row and providing a lens facing each of the light sources by cutting the plurality of lens surfaces around the optical axis position of the light source. In the body, when the light source is viewed through the lens, the light source image seen on the outer lens surface is set to be larger than the light source image seen on the inner lens surface. . 2. The size of the light source seen from the outer lens surface is substantially the size of the light source itself, and the size of the light source seen from the inner lens surface is set to be reduced. Characteristic vehicle lamp. 3. The vehicle lamp according to claim 1, wherein the outer lens surface is a prism lens or a convex lens, and the central lens is a concave lens. 4. The method according to claim 1, 2 or 3, wherein the lens surface on the side far from the light source is made larger so that light having a small angle with the optical axis of the light source can enter. Characteristic vehicle lamp.