JPS6178003A - 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 [Industrial Field of Application] The present invention relates to a vehicle lamp that uses a light emitting diode as a light source, and is particularly adapted to prevent dazzling of following vehicles.

[Conventional technology]

In recent years, with the development of semiconductor technology, high brightness light emitting diodes have been developed and can now be obtained at low cost, which has led to the use of vehicle lights 2, such as direction indicator lights.

It has come to be used instead of a light bulb as a light source for rear lights, etc. (e.g., Utility Model No. 11240S, 58-
34301) 0 Unlike a light bulb, a light emitting diode does not have a filament, so it has a semi-permanent lifespan.Lights that use light bulbs must be structured so that they can be replaced in the event of a disconnection, so there are restrictions on the light itself and its mounting position. However, light emitting diodes do not require replacement, and there are fewer restrictions on the light fixture itself and its mounting location. Normal light fixtures are shaped to be embedded inside the vehicle body, with the depth dimension increasing by the length of the bulb and the depth of the reflector. However, lighting equipment using light-emitting diodes is extremely small and does not require a reflector, so it can be made thinner and easier to install.Light-emitting diodes generate significantly less heat than light bulbs and have good luminous efficiency. Because it has excellent features, it can be said to point to the direction of future lighting equipment.

As a lamp using light emitting diodes, a large number of light emitting diodes are arranged in the lamp and connected in series, and these light are emitted to illuminate the front lens0. [Problem to be solved by the invention] [Point] By the way, recent lighting equipment has become taillight, taillight, etc. due to design requirements.
Most of the time, so-called combination lamps that integrate turn signal lights, reversing lights, etc. are long in the left and right direction, so if the entire front lens is illuminated with light-emitting diodes, it will cause glare to following vehicles. becomes a problem. In other words, if it is formed long in the left-right direction, the end opposite to the side end of the vehicle body of each light fixture attached to both sides of the rear part of the bundle extends to near the center of the vehicle body, so that it extends over almost the entire length of the vehicle body width. It will be illuminated in a strip. As a result, the illuminated area is extremely large, creating an inconvenience in that it is too bright and distracting to drivers of cars following, which can lead to unexpected accidents.

The present invention has been made in view of these points, and it is an object of the present invention to provide a vehicle lamp that prevents dazzling of following vehicles and ensures road traffic safety.

[Means for solving problems]

The vehicle base lamp according to the present invention divides the front lens into a plurality of regions lined up in the left and right direction, and changes the amount of light transmitted through each region, with the region on the center side of the vehicle body being the darkest and the region extending to the side of the vehicle body. It is designed so that it becomes brighter as the brightness increases.

[For production]

In the present invention, the brightness of the front lens is changed for each area, so the degree of glare is low, and there are many variations in design.Furthermore, since the area on the side of the vehicle body is brightest, the vehicle width Facilitate confirmation.

〔Example〕

Hereinafter, the present invention will be described in detail based on embodiments shown in the drawings.

FIG. 1 is a partially cutaway perspective view showing an embodiment of a vehicle lamp according to the present invention, FIG. 2 is an enlarged sectional view of the main part of the lamp, and FIG. 3 is a perspective view of an automobile equipped with the lamp. be. In these figures, reference numeral 1 denotes taillights attached to the rear sides of an automobile 2, and a bank cover 3. Front lens 4 attached to back cover 3. It is composed of a light guide plate 62, a light emitting diode 7, a circuit board 8, etc. arranged in a light chamber 5 formed by the back cover 3 and the front lens 4. The bending portion 3A is integrally provided at the side end of the vehicle body and is bent along the side surface of the vehicle body.

The front lens 4 is formed of a light-transmitting resin such as acrylic resin into a shallow box shape with its back side open, and its peripheral edge is secured with a set screw 9. It is fixed to the back cover 3 via a gasket adhesive or the like. Also, the front lens 4
0 A bent part 4A which is bent along the side of the vehicle body, similar to the bent part 3A of the back cover 3, is integrally provided at the side end of the vehicle body, thereby forming a rotating lens. There is. The front lens 4 has a large number of light transmitting parts 11 provided at predetermined intervals in the vertical and horizontal directions by masking the surface of the lens with a light shielding film 10 of the same color as the vehicle body color. The remaining portions constitute a light-impermeable portion by a light-shielding film 10, and a small lens group consisting of a large number of convex lenses 12 is closely formed on the inner surface.

The light guide plate 6 constitutes a holding member for the light emitting diode I, and also guides the light from the diode 7 to a far distance to prevent light loss, and is made of acrylic resin or the like.
It is formed into an L-shape, and its end is fixed to the inner surface of the end of the front lens 4 with a set screw 13 . Also,
A large number of small holes 14 are formed through the light guide plate 6 in correspondence with each light transmitting portion 11 of the front lens 4, and red light emitting diodes 7 are inserted into each of these small holes 14. There is. Then, the lead wire 1 of each light emitting diode γ
6m + 16b are inserted between the light guide 6 and the bank cover 3 (by being inserted into the lead wire insertion holes of the interposed circuit board 8 and soldered to the electrical circuit of the board 8). It is connected.

Although it is possible to use a general printed circuit board as the circuit board 8, it is preferable to use a flexible printed circuit board.By doing so, the light emitting diode T can be connected by utilizing the flexibility of the board itself. The assembly absorbs errors, facilitates insertion into the small hole 14, uses restoring force to press the light emitting diode γ against the surface of the small hole 14, prevents the diode T from wobbling, and also reduces the thickness of the lamp itself ( (depth dimension) can be made even thinner.

When the light emitting diode 7 is made to emit light, it emits red light, which is transmitted through the light transmission section 11 of the front lens 4 and emitted to the outside, illuminating the lens 4 in red.

Here, since the tail light 1 is formed to be long in the horizontal direction as described above, if the light transmitting part 11 of the front lens 4 is illuminated with the same brightness by light emission from the light emitting diode T, there will be a drawback of the conventional method. In order to solve this problem, the present invention provides a plurality of front lenses 4 in the left and right direction, for example, in three areas! . I'm trying to change the brightness. As specific methods for changing the brightness, there are two methods: one is to change the number of light transmitting parts 11 per unit area for each region without changing the brightness of the light emitting diode γ itself, and the other is to change the number of light transmitting parts 11 per unit area. The simplest methods are to change the brightness of the light emitting diode γ for each area without changing the area, and to change the size (area) of the light transmitting part for each area. That is,
FIGS. 1 and 2 show examples in which the number of light transmitting parts 11 per unit area is changed for each region, and each region r, n, m
The distance between each row of light transmitting parts 11 is dl +d.
! +d! Then, the condition dl<dt<ds is added. In this way, the amount of light transmitted (light 1ll-) is highest in area (2), followed by area (2), and smallest in area (2), so area 1.
The brightness of If and II can be changed stepwise. In this case, the spacing between each column dl + dt + dj was changed, but the row spacing (the spacing between vertically adjacent light emitting diodes) may be changed, or the spacing between both rows and 1 column may be changed. Of course it's a good thing.

On the other hand, FIG. 4 is a circuit configuration diagram showing an embodiment in which the brightness of the light emitting diode itself is changed for each region. In the figure, 30 is a DC power supply, 31°, 32.33 is a light switch, and R1 to R5 are resistors. The light emitting diodes T in region (3) are connected in series in each column and in parallel to the power source 30. Similarly, the light emitting diodes I in regions (1) and (N) are also connected in series for each column and in parallel to the power source 30. The light switch 31 is arranged for the group of light emitting diodes in the area (3), and during normal lighting, the terminal a! on the resistor R1 side is connected to the light switch 31. When the brake is applied, it is switched to the terminal a2 on the side where the resistor R1 is not connected. The light switch 32 is arranged for the group of light emitting diodes in the area (■), and when normally lit, the terminal b1 on the resistor Rs side
It is connected to the terminal on the resistor R1 side during braking. The light switch 33 is arranged for the group of light emitting diodes in the area (3), and is connected to the terminal CI on the resistor R5 side during normal lighting and to the terminal C2 on the resistor R4 side during braking. The light switches 31, 32, and 33Fi are switched in conjunction with each other, and the resistance values of the resistors R1 to Rs are set to gradually increase in accordance with the order of these resistors.

Therefore, during normal lighting, that is, light switch 3
1, 32, and 33 are connected to the terminals 'l+b++cl, respectively, the light emitting diode group in area I emits the brightest light, and then the brightness of the light emitting diode group in area II increases by the difference between resistors R and R3. The light emitting diode group in region I becomes darker, and the diode group in region
, the light emitted is darker than the light emitting diode group in area (■). Similarly, when braking, the light switch 31°3
2.33 are switched to terminals IL2. b! ,el
Since the light emitting diode group in region I is connected to resistor R1
The brightness of the light-emitting diodes in the region (■) is brighter than the brightness when the light is normally lit by the amount that is missing, and then the brightness of the light-emitting diodes in the area (■) increases with the resistance R.
The diode group in region (1) emits light brighter than in normal lighting by a difference of 3.

In this case, the resistors R2 and R4 (or R3 and R5) and the light switch 32.33t- may be removed, and only the brightness of the light emitting diode group in area I may be changed between normal lighting and braking. .

Note that although the method of changing the size of the light transmitting portions 11 for each region I, II, and ill is not shown, it is substantially the same as changing the number of light transmitting portions 11 per unit area.

Boundaries A (see Figure 2) between areas I and ■ and between areas A light absorption layer 36 is formed of paint or the like. This light absorption layer 36 absorbs the light guided into the opponent area while reflecting inside the boundary area A, thereby making the boundary area even clearer. We have explained the case where a light transmitting part and a light non-transmitting part are provided.
When a method of electrically changing the amount of light from the light emitting diode T is adopted, the light shielding film 10 is not necessarily required.

In addition, although the above embodiment has been described with reference to the case where it is applied to a taillight, the present invention is not limited to this.For example, the light emitting diodes in area I may be red light emitting diodes, and the light intensity may be changed during normal lighting and during braking, and the light emitting diodes in area For example, if the group is made of yellow light emitting diodes and the group of light emitting diodes in area (3) is made white, it is also possible to use it as a combination lamp that integrates a tail light, a direction indicator light, and a reversing light.

〔Effect of the invention〕

As explained above, the vehicle lamp according to the present invention is configured such that the front lens is divided into a plurality of regions in the horizontal direction, and the brightness of each region is changed so that the regions closer to the sides of the vehicle body are illuminated brighter. Therefore, compared to the case where the entire surface of the lens is illuminated with uniform brightness, it is possible to reduce and prevent glare to the following vehicle and improve the safety of the spout. In addition, since the brightness varies, the exterior appearance is improved with a wide range of variation, and the sides of the vehicle are brightest, making it easier to identify the vehicle.

[Brief explanation of drawings]

Fig. 1 is a partially cutaway perspective view showing an embodiment of a vehicle lamp according to the present invention, Fig. 2 is an enlarged perspective view of the main parts of the lamp, and Fig. 3 is a perspective view of an automobile equipped with the lamp. , FIG. 4 is a circuit diagram of a light emitting diode. 11111...tail light, 3Φ, fist, back cover, 4...
...Front lens, 6...Light guide plate, 1...Light emitting diode, 8.Fist...Circuit board, 10...Light shielding film,
11...Light transmitting part, 12...Convex lens, I, I
I, III... area.

Claims (1)

[Claims] A large number of light emitting diodes illuminating the lens are arranged inside a front lens that is long in the left and right direction, the front lens is laterally divided into a plurality of areas, and the amount of light transmitted through each area is changed, so that the center side of the vehicle body A vehicle lamp characterized in that each area is illuminated so that the area is darkest and the area closer to the side of the vehicle body is brighter.