JPH06243703A - Vehicle signal light - Google Patents

Abstract

PURPOSE:To provide a feel that a vehicle signal light has some depth and a stereoscopic effect so as to enhance the properties of the vehicle signal light as a product by splitting an LED light source comprised of an assemblage of plural LED elements into frames, and disposing the frames roughly along a line that connects the effective outside diameter and focus of a lens. CONSTITUTION:A lens 3 has single-focus Fresnel cuts 3a so that its overall surface converges to one focus F. A plurality of LED elements 2a are arranged in circles on large-, medium- and small-diameter bases, 2b, 2c, 2d, respectively. On a line P connecting the effective outside diameter D and focus F of the lens 3, the large-diameter base 2b is disposed in proximity to the lens 3, the small-diameter base 2d is disposed in a deep position and the medium-diameter base 2c is disposed halfway between the bases 2b, 2d. When a vehicle signal light 1 is viewed from the lens 3 at a sufficient distance the small-diameter base 2d farthest from the lens 3 seems to be most enlarged, making the viewer feel that the signal light has some depth. When the light is viewed from the diagonal direction the relative positions of the bases seem to vary depending on the angle from which they are viewed, thus providing an enhanced stereoscopic effect.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vehicular signal light, such as a tail light, and more particularly to providing a novel appearance of the signal light which is excellent in depth and the like.

[0002]

2. Description of the Related Art FIG. 3 shows an example of the configuration of a conventional vehicle signal lamp 90 of this type. For example, LED elements 91b are arranged in rows and columns on a rectangular flat substrate 91a to form LEDs. A light source 91 is formed, and the irradiation direction side of the LED light source 91 is covered with a lens 92 provided with a convex lens cut 92a corresponding to each of the LED elements 91b. When the vehicle signal lamp 90 is turned on, Due to the diffusing action of the convex lens cut 92a, the entire surface of the lens 92 becomes bright with a uniform brightness, for example, red.

[0003]

However, in the above-described conventional vehicular signal lamp 90 having the above-described structure, the flat LED light source 91 is diffused by the convex lens cut 92a to show whether the light source exists near the surface. Since it is covered with 92, its light emitting surface is extremely superficial and poor in commerciality. For example, it is impossible to meet the demand from the design side, which requires a depth feeling and a three-dimensional effect in order to produce a high-class feeling. There was a point, and the solution of this point had become an issue.

[0004]

As a concrete means for solving the above-mentioned conventional problems, the present invention is constructed by assembling a single focal point Fresnel-cut lens and a plurality of LED elements. An LED light source, wherein the LED light source is divided into a frame shape and arranged so as to be substantially along a line connecting the effective outer diameter of the lens and the focal point. To solve the problem.

[0005]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, the present invention will be described in detail based on an embodiment shown in the drawings. Reference numeral 1 in FIG. 1 is a vehicular signal lamp according to the present invention, and the vehicular signal lamp 1 has an LED light source 2 formed by assembling a plurality of LED elements 2a.
And the lens 3 with the lens cut is the same as the conventional example, but the lens cut of the lens 3 according to the present invention is such that the entire surface of the lens 3 has one focal point F. It is a single-focus Fresnel cut 3a which is designed to converge to.

According to the present invention, the LED light source 2 is
One substrate is sequentially punched into a frame shape, and if the substrate at this time has a circular shape, it is formed into a so-called donut shape, for example, divided into three substrates of a large diameter substrate 2b, a medium diameter substrate 2c and a small diameter substrate 2d. A plurality of LED elements 2a are arranged in a circular shape or the like on each of the substrates 2b to 2d.

Here, when each of the LED light sources 2 is arranged on the back surface of the lens 3, the LED light sources 2 are arranged in a shape along a line P connecting the effective outer diameter D of the lens 3 and the focal point F. The large-diameter substrate 2b having the largest outer diameter is arranged closest to the lens 3, and the small-diameter substrate 2d having the smallest outer diameter is arranged farther from the lens 3, that is, at a deeper position. 2c is both substrates 2b and 2d
It is supposed to be placed in the middle of the position.

In the actual implementation, the LED light source 2 is not limited to the above three stages, and the number of stages may be freely increased when, for example, the effective outer diameter D of the lens 3 is large. is there. Further, it is not always necessary to form the small-diameter substrate 2d in the shape of a donut, and it is also possible to form it in the shape of a disc.

Next, the operation of the vehicular signal lamp 1 of the present invention having the above structure will be described. FIG. 2 conceptually shows the vehicular signal light 1 as viewed from, for example, a following vehicle. When the vehicular signal light 1 is viewed with a sufficient distance from the lens 3 side, The line of sight S is substantially parallel to the surface of the lens 3, and after passing through the lens 3, the line of sight S is refracted by the Fresnel cut 3a and converges near the focal point F.

In this state, the viewer does not sense the refraction due to the Fresnel cut 3a, so that each of the large-diameter substrate 2b, the medium-diameter substrate 2c and the small-diameter substrate 2d which is seen through the lens 3 is viewed. The state after passing through the lens 3, that is, the line P is viewed by the viewer so as to be positioned on the extension of the line of sight S. This means that the side of the small-diameter substrate 2d, which is provided at a distance from the lens 3, can be seen further enlarged, and the vehicular signal lamp 1 can be seen and viewed as if it were looking through the inner surface of the cylinder. This gives the person a feeling of depth equal to or greater than the actual depth dimension of the vehicular signal lamp 1.

Further, since the large-diameter substrate 2b, the medium-diameter substrate 2c and the small-diameter substrate 2d are provided with different distances from the lens 3, the vehicular signal lamp 1 can be viewed from an oblique direction, for example. In doing so, the positional relationship of the substrates 2b to 2d looks different depending on the viewing angle, and this action also gives a more three-dimensional effect. Reference numeral 4 in the drawing is an inner lens, and the inner lens 4 is provided with a convex lens-shaped lens cut corresponding to each LED element 2a, like the lens of the conventional example. Each of the substrates 2b-2
This is intended to make the brightness uniform on the d-plane.

[0012]

As described above, according to the present invention, a single focal point Fresnel cut lens and a plurality of L lenses are provided.
An LED light source configured by collecting ED elements, wherein the LED light source is divided into a frame shape and arranged substantially along a line connecting an outer diameter of the lens and a focal point, thereby providing a vehicular signal lamp. This allows the LED light sources to be arranged on the extension line of the line of sight when the lens is viewed, and changes the magnification ratio due to the distance difference from the lens to generate a sense of depth. As a result, the signal light for vehicles, which has an unprecedented three-dimensional effect, has an extremely excellent effect in improving the commercial characteristics.

Since the LED light sources are divided and arranged with a difference in distance from the lens, the mutual positions of the LED light sources change depending on the viewing angle. Will further enhance the three-dimensional effect.

[Brief description of drawings]

FIG. 1 is a cross-sectional view showing an embodiment of a vehicular signal lamp according to the present invention.

FIG. 2 is likewise an explanatory view showing the operation of the present invention.

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

[Explanation of symbols]

 1 ... Vehicle signal lamp 2 ... LED light source 2a ... LED element 2b ... Large diameter substrate 2c ... Medium diameter substrate 2d ... Small diameter substrate 3 ... Lens 3a ... Fresnel cut 4 ... Inner lens D ... … Lens effective outer diameter F …… Focus P …… Line connecting effective outer diameter of lens and focus S …… Line of sight

Claims (1)

[Claims] 1. An LED light source composed of a lens having a monofocal Fresnel cut and a plurality of LED elements assembled together, the LED light source being divided into a frame shape and an effective outer diameter of the lens. A vehicular signal lamp which is arranged so as to substantially follow a line connecting the focal point.