JPS5812202A - Lamp apparatus for vehicle - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a vehicular lamp, and more particularly to a vehicular lamp in which the brightness f of the lens surface is made uniform and visibility is improved.

2 Page 1 In recent years, this type of vehicle lamp has been designed to reduce the depth and thickness of the lamp by directing the direct light emitted from the light source directly to the front lens without using a paraboloid of revolution reflector that takes up space. A lighting device for stone vehicles that is controlled by forming a direct Fresnel grid has been proposed.

In a conventional vehicle light AU equipped with a front lens formed with a direct-light Fresnel prism, as illustrated in FIG. , and the front lens b faces the light source in order to control the light emitted from the light source (direct light) as light substantially parallel to the optical axis X. It consists of an inner lens f forming a so-called direct-ray system Fresnel prism with a refractive prism g in the center and reflective prisms h and h' on its outer periphery 15), - emitted light from a light source e (direct light) ), the inner lens 1<incoming light is incident within the range of angle α0 as shown in the figure, and the direct-input Fresnel prism 2o'
In addition to making the light almost parallel to the optical axis X,
Ie ~ 4 fisheye prism condenses light to achieve desired light distribution I
While the mouth is configured to have a meeting,
In such a conventional vehicle lamp, since the front lens tb is formed in a planar shape and is disposed in the housing 1, the direct Fresnel norm light formed in the inner lens It is particularly At an angle of α0 as shown in the diagram 1o, the light enters the refractive prism section 1 provided at the center facing S@< and the reflection prisms h and h' provided at the outer periphery. The incident angle α0 is 180 because the inner lens f is flat.
It is impossible to exceed @. Therefore, since the light incident on the isinalen tfK is within the range of angle α0, the light m-
Due to the low utilization rate of the luminous flux from the light source C, the entire lens surface is dark, especially in the outer periphery far from the light source C.
, h' is incident on the angle βi, which is within the range of β, and has a value that is very small compared to the value of the angle α0. In other words, in the outer periphery of the inner lens, ff, which is far from the light source C, the amount of luminous flux from the light source/cloud is small, and the luminous flux density decreases, so the central part facing the light source of the inner lens f appears bright from the outside, but There is a dark area on the outer periphery, and the presence of such a border causes uneven brightness on the lens surface, making it impossible to obtain a uniform brightness surface over the entire lens surface, making the lighting filling unsightly, or for display functions such as signal lights. However, there are drawbacks such as a decrease in visibility as it cannot be achieved sufficiently.

The present invention has been developed in view of the above circumstances, and the present invention effectively utilizes the light flux of the bulb, eliminates the dark area that occurs in the outer periphery far from the light source of the lens 411, and makes the brightness uniform over the entire surface of the lens. It is an object of the present invention to provide a vehicle lamp that is designed to improve visibility.

Embodiments of the vehicle lamp according to the present invention will be described below with reference to the accompanying drawings.

The illustrated example in FIGS. 2 and 3 is an example in which the present invention is applied to a tail light for an automobile, and 1 is a housing;
A lens 2 disposed in front of the lens 2 and a lamp chamber l defined by
Inside O, the holder 52 is inserted through the socket 51.
The front lens 2 has an outer lens 21 and an inner lens ρ inside it, and a fisheye prism part 22m is provided on the outer surface of the inner lens 4. The optical axis of the light emitted forward from the light source (filament) P of the pulse f5 is located in the central part 6 near the optical axis A refractive Fresnel prism section 22b is formed to control the refraction of the rays into substantially parallel rays.

and an outer periphery around the central portion 60 of the inner lens 4;
The parts (farthest from the light source P) 7 and 8 have flat parts n·, 22
・' is formed in the flat part 22@ of the outer part 7.8 which is further away from the light source P of the inner lens ρ,
22 (1' is provided with an optical means so as to make a large amount of luminous flux incident on it. The optical means consists of a side lens 3 and a reflecting part 4, and yt3 on the side is a light source. The system is configured so that the light emitted from P to the side (side light) is refracted into a light beam substantially parallel to the horizontal axis Y perpendicular to the optical axis X, and is made to enter the reflecting section 4. , the reflecting portion... 4 a The sideward 7je8 light is directed to the inner lens 22 (D the plane of the outer circumferential portion 7.8 $5 Z! *
, 22 @' is configured so as to be totally reflected.

More specifically, the side lens Je3 has a right side lens Je31 and a left side lens on both sides of the light source P (approximately parallel to the optical axis It is arranged. In addition, the inner surfaces of the side lenses je31 and 32U disposed on both sides of the light source P (light source P) K
Fresnel cuts 31a and 32m are respectively provided around the horizontal axis Y of /4 f5 perpendicular to the optical axis It is formed so as to control the refraction of light into rays substantially parallel to the horizontal axis Y. In addition, the side lens 31
．． 31m (Fresnel cutter installed on the internal surface on the external surface with 32)
, 32m are formed with sawtooth prism portions 31b and 32k, respectively, so that the substantially parallel light rays from 32 m are incident on the reflecting portions 41 and 42 provided in the housing 1.The reflecting portions 41 and 42 are Side lenses 31 on both sides
.

The light emitted from each side lens je31.32 is scattered corresponding to the inner lens, I
Each flat part 226°2 of the outer circumference 7.8 of Ie22
A reflecting film or a reflecting mirror is provided on the inner surface of the housing 1 so as to reflect light rays substantially parallel to the optical axis X toward the direction 2@'.

Since the configuration is as described above, the optical action when the pulse f5 is turned on is as shown in FIG.
220 The light enters the Fresnel prism part 22bK on the inner surface of the central part 6 in the vicinity of the optical axis X facing the light source P, is refracted into a beam substantially parallel to the optical axis X, and is transmitted through the wall thickness as it is. The light is then condensed by the outer WiO fisheye prism section 22aK, transmitted through the outer lens r21, and emitted to the front of the lens. Furthermore, the light emitted from the light source P to you is transmitted to the right side lens 31 and the left side lens J as shown by the dotted line in the figure.
Fresnel cutter on each inner surface with e32) 31m.

321, the sawtooth-shaped f-rhythm portions 31b are formed on the respective outer surfaces by being refracted into substantially parallel rays with the horizontal axis Y.
, 32b) is refracted and emitted toward each of the L reflecting sections 41.42 provided in the housing IK.
The optical axis X and substantially parallel light a toward the outer peripheral portion 7.8 on both sides of
A large amount of reflected light with a high luminous flux density is made incident on the inner surface plane portions 4 and 22@' through lK reflection control, and is transmitted through the wall thickness and transmitted through the axactor lens jP4 through the outer surface fisheye prism portion 22m. A desired light distribution/turn is constructed by controlling the light to be focused in the direction of the lens.

As shown in FIG. 3, out of the direct light emitted from the light source P in the wheel lamp of the present invention, the light emitted forward that enters the central portion 6 near the optical axis X of the inner lens n is as shown in the figure. The light flux within the range of angle α1 shown by the solid line has the same amount of light as Ichito. In addition, the light emitted from the light source P to the sides, that is, the side light, is the luminous flux in the range of angle α on the right side and the range of angle α− on the left side, which are indicated by dots in the figure, on both sides of pulse f5. The left and right lateral lenses of the optical means arranged in! Fresnel cuts 31m and 32 formed on the inner surfaces of 31 and 32, respectively.
5 portions 31m of saw-toothed grazes are formed on the outer surface by controlling the radiated light directed to the sides of aK and P to be substantially parallel to the horizontal axis Y. 1 and 32b, and the reflection portions 41 and 42fi provided corresponding to the left and right side lenses, e and (1 and 32) are incident on the inner surface of the housing 1, respectively. The outer periphery on both sides of the inner lens je22 is 7 degrees.Therefore, the emitted light from the light source P is at an angle α0
The luminous flux in the range of 1+α−10α1 can be used effectively, and the amount of incident light can be greatly increased. In particular, the outer circumferential portion of the front lens, Ie2, 7.8Ka side lens 31. If a large amount of light with a high luminous flux density is incident on the optical means of the proverbial and reflective portions 41 and 42, the brightness of the outer peripheral portion 7°8 can be compensated for. .8 is 〆-
This eliminates the occurrence of dark spots and makes the brightness of the entire lens surface uniform, making it easier to see.

There are effects such as being able to obtain a wheel lamp that fully satisfies the attributes.

In the above embodiment, the outer part 7. of the front lens 2.
Optical means 10 for making a large amount of light incident on the light beams 8 and 8 have been described above, but the present invention is not limited to this, and depending on the structure of the wheel lamp, the optical means 10 may be arranged on one side of the pallet f5 or on the entire circumference. It's good.

As is clear from the above embodiments, a vehicle light according to the present invention
is a lamp in which a light source is placed in a lamp space defined by a housing and a lens disposed in front of the housing, and the front lens has at least five Fresnel nozzles in the center facing the light source. The optical means for directing a large amount of light flux toward the outer periphery far from the surrounding light source is disposed on the side of the light source substantially parallel to the optical axis, and has an inner surface that directs side light from the light source along the optical axis. A side lens is provided with a Fresnel cut that refracts substantially parallel light alK to the horizontal axis perpendicular to the horizontal axis, and a serrated rhythm portion is provided on the outer surface, and the light from the scissor side lens is reflected toward the outer periphery of the front lens. Since the present invention is characterized by having a reflecting portion provided in the housing, the present invention can eliminate the conventional problems and also allows a large amount of light with a high luminous flux density to be incident on the pulp. Therefore, the brightness of the entire surface of the lens can be made uniform, and a vehicle lamp with good visibility can be obtained.

It should be noted that the present invention is not limited to the above-described embodiments.

[Brief explanation of the drawing]

Fig. 1 shows a cross-sectional view explaining the optical function of a conventional lamp stem, Figs. 2 and 3 show an embodiment of the vehicle lamp of the present invention, and Fig. 2 explains the optical system of the lamp. Sectional view of main parts, 3rd
The figure is an explanatory diagram showing the range of use of emitted light from pulp. 1...Housing, 2...Front lens, 22b...
・Fresnel prism part, 3 ('31.32)... Side lens/(optical means), 4 (41, 42)... Reflection part (
optical means), P... light source, 6... central portion, 7, 8...
...Outer circumference, lO...light chamber, X...optical axis, Y...
horizontal axis. Patent applicant: Ichikoh Industries Co., Ltd. Agent: Patent attorney: Tadashi Akimoto Younger brother, Figure 11

Claims (1)

[Claims] A lamp in which a light source is disposed within a lamp chamber defined by a housing and a lens disposed on the front surface of the housing, wherein: 1. The front lens tVC is provided with a Fresnel prism part at least in the central part facing the light source, and an optical means for directing a large amount of light flux toward the outer peripheral part far from the light source is placed on the side of the light source approximately parallel to the optical axis. and a side lens with a Fresnel cut on its inner surface that refracts the light from the light source into a ray substantially parallel to the horizontal axis perpendicular to the optical axis, and a serrated prism section on the outer surface, A vehicular lamp comprising: a reflecting section provided on the housing so as to reflect light from the side lenses toward the outer periphery of the front lens.