WO2019047723A1

WO2019047723A1 - Vehicle lamp for replacing h4 bulb

Info

Publication number: WO2019047723A1
Application number: PCT/CN2018/101964
Authority: WO
Inventors: Yihui Yang; Hongqiao YANG
Original assignee: Ether Photoelectric Ltd.
Priority date: 2017-09-06
Filing date: 2018-08-23
Publication date: 2019-03-14
Also published as: CN107559613A

Abstract

A vehicle lamp for replacing H4 bulb relates to the technical field of automobile headlamp. The vehicle lamp includes a first light emitting diode (5), a second light emitting diode (6), a lens (1), a reflective element (4), a heat sink (7), an additional heat sink (9) and a positioning disc (8). The first light emitting diode (5) and the second light emitting diode (6) are arranged above and below the heat sink (7). The reflective element (4) is arranged right above the first and second light emitting diodes (5, 6). The lens (1) is arranged on a front part of the heat sink (7), and the additional heat sink (9) is arranged on a rear part of the heat sink (7). The problem of light scattering of the first light emitting diode (5) used as low beam light is effectively solved by adding the lens (1) to concentrate light and by the reflective element (4) and a light shielding mechanism (10).

Description

VEHICLE LAMP FOR REPLACING H4 BULB

TECHNICAL FIELD

The present disclosure relates to the field of automotive headlamps, and more particularly to a vehicle lamp for replacing an H4 bulb.

BACKGROUND TECHNOLOGY

Automotive headlamps, also known as vehicle headlamps, are mounted on both sides of the automotive’s head for night road lighting. According to official statistics, 60%of traffic accidents occur at night, while 22%of traffic accidents occur in the case of unclear sight of drivers; the lack of illumination of the headlamps is an important cause of traffic accidents. Automotive lighting has been listed as the third major factor in driving safety.

Due to production costs and other reasons, many automotive models are currently using a relatively conventional tungsten halogen lamp with no lens design, such as the commonly used H4 halogen lamp. This traditional headlamp has a large disadvantage in performance. The low beam light and high beam light cannot be illuminated at the same time, and there are fatal weaknesses in brightness, service life, volume, heat generation, color temperature adjustment, robustness and the like, which are mainly reflected by serious lack of illumination brightness, low utilization rate of light, and yellowing light, thus bringing certain safety hazards to driving at night.

In recent years, with the increasing luminous efficiency of the light emitting diode (LED) and the decreasing cost, semiconductor lighting has gradually become the developing trend of modern lighting, which is known as the fourth generation of lighting electric light source after the incandescent lamp, fluorescent lamp and energy-saving lamp, and is called the “21st Century Green Light Source” . Therefore, many people use the LED instead of H4 bulb.

However, although the H4 type LED headlamp is very bright, the light is scattered and glaring because most automobile headlamp assemblies are lens-free. For the automobile model with original lens-free halogen lamp, after the LED H4 bulb is installed, due to the change of the light-emitting position and shape, the light-emitting part deviates from the focus position, the original lamp bowl can not effectively concentrate light of the LED headlamp, and the traditional lampshade can not play the role of concentrating light, so that the effect is greatly reduced. Moreover, the illuminating light is seriously scattered, the cut-off line of light is unclear, and the function of the high beam light is incorrect, which not only the brightness is affected, but also the glaring effect is caused, seriously affecting the normal driving of the opposite vehicle, and causing extremely great safety hazard. For the lamps equipped with H4 bulb, a regulation cannot be meet for above reasons, which causes the vehicle to be unable to drive on the road.

SUMMARY OF THE INVENTION

The present disclosure provides a vehicle lamp for replacing an H4 bulb, which aims to solve the problem that the existing automobile H4 halogen bulb has insufficient brightness, insufficient light concentration, unclear cut-off line, and is incapable of simultaneously turning on the low beam light and the high beam light.

The present disclosure is achieved by the following technical solution: the vehicle lamp for replacing the H4 bulb includes a first light emitting diode, a second light emitting diode, a lens, a reflective element, a heat sink, an additional heat sink, and a positioning disc; the light emitting diode and the second light emitting diode are respectively arranged above and below the heat sink; the reflective element is arranged right above the first light emitting diode and the second light emitting diode for reflecting light emitted by the first light emitting diode and the second light emitting diode; the lens is provided on a front part of the heat sink for refracting light emitted by the first light emitting diode and the second light emitting diode; the additional heat sink is arranged on a rear part of the heat sink, and is connected to the heat sink; the positioning disc is arranged between the heat sink and the additional heat sink; the first light emitting diode and the second light emitting diode are electrically connected with an external driver and a power supply through a wire by passing through heat dissipation holes located between the heat sink and the additional heat sink.

Further, the first light emitting diode and the second light emitting diode are arranged asymmetrically above and below the heat sink, the first light emitting diode is arranged at an upper rear side of the heat sink, and the second light emitting diode is arranged at a lower rear side of the heat sink.

Further, the first light emitting diode is illuminated to be used as a low beam light, and the second light emitting diode is illuminated to be used as a high beam light. The first light emitting diode is in a normally bright state, and the second light emitting diode is extinguishable according to a road condition, that is, the low beam light is always working while the high beam light is turned on, and the distance and the vicinity are all lightened, which ensures the safety of driving at night. It is impossible for the traditional H4 halogen lamp to achieve the integration of the low beam light and the high beam light, because lighting two filaments at the same time will cause the temperature to be too high.

Further, a diameter of the lens is less than 40 mm, the lens is made of glass, PC or PMMA, and the reflective element is provided above the first light emitting diode such that light emitted by the first light emitting diode is refracted through the reflective element and passes through the lens.

Further, a light shielding mechanism is arranged below the front end of the heat sink, so that the high beam light produces a clear cut-off line.

Further, the reflective element is arranged above the first light emitting diode so that the light emitted by the first light emitting diode is refracted through the reflective element and passes through the lens, the conventional automobile headlamp is not equipped with a lens, and only can scatter the light through reflection, which causes the light to be unevenly distributed, and the light is illusory, the angle of the light is relatively small and difficult to control. On the headlamp, the lens is different from the ordinary mirror, and its surface is aspherical lens, whose function is to manipulate the direction of the light or to control the distribution of the light. When a beam of light hits the lens, multiple lights from different directions will gather at the same point, which is called as "focus" ; and then the light will evenly scatter. This effect makes sense for the automobile headlamp. After the LED replaces the H4 bulb, it is difficult to produce a clear cut-off line of the original halogen lamp due to the change of the focus, such that a part of light is scattered to an angle that should not be illuminated.

The light shape of the lens is the most standard. In combination with the light shielding mechanism arranged on the heat sink, a clear cut-off line can be obtained, and the reflective element above the first light emitting diode is specially designed according to the characteristics of the LED headlamp, and is consistent with the focus of the original headlamp, such that the light emitted by the low beam light is uniform and not scattered, which not only ensures high brightness, but also does not affect the normal driving of other drivers on the road, and makes the low beam light meet DOT and ECE regulations and Chinese CCC regulations and other national regulations.

In this way, by adding the lens to concentrate light and the self-contained reflective element to refract light and through the role of the light-shielding mechanism on the heat sink, the problem of the light scattering of the first light emitting diode used as the low beam light is effectively solved, the light source is clearly visible and not glaring. The headlamp adopted with a lens type lamp head, compared with the headlamp adopted with a conventional lamp head, has the advantages of uniform brightness, strong penetrating power and small light loss, thereby obtaining the clear cut-off line to make the low beam light transparent and bright.

Further, an interface for mounting the reflective element is reserved below the second light emitting diode, such that the reflective element is mounted as needed, and light emitted by the second light emitting diode is refracted through the reflective element or a reflective element of an original vehicle lamp.

Further, a light path of the the second light emitting diode is consistent with a light path of an original H4 halogen bulb when the light emitted by the second light emitting diode is refracted through the reflective element of the original vehicle lamp, that is, the focus is unchanged, such that the light emitted by the high beam light is not scattered and has a long range.

Further, in order to achieve heat dissipation, the reflective element is made of a metal alloy material, and an outer surface of the reflective element is provided with an anodized heat dissipation fin, and an inner surface thereof is vacuum aluminized, and the heat dissipation fin further comprises a heat resistant layer. The heat sink and the additional heat sink are made of metal alloy heat conductive material, and surfaces of the heat sink and the additional heat sink are provided with anodized heat dissipation fins; room and at least one interface for mounting a cooling fan are reserved on the additional heat sink, and the cooling fan can be added according to needs. Since the light emitting diodes are highly concentrated in the closed working environment of the lampshade, the heat generated is also highly concentrated, so mounting the cooling fan greatly improves the heat dissipation efficiency and heat resistance of the LED headlamp.

Compared with the prior art, the vehicle lamp for replacing the H4 bulb disclosed by the present disclosure has the beneficial effects of:

1. The invention replaces a traditional halogen bulb with a lamp bead of the light emitting diode. As a new light source, the light emitting diode has the advantages of long service life, saving energy, good light quality, simple structure, fast response, low voltage, and small volume, etc. Compared with the traditional H4 halogen lamp, the brightness is increased by more than 80%, at the same time, the shortcomings of low luminous efficiency and high power consumption are overcome, thereby achieving the purpose of saving electricity and energy.

2. The invention effectively solves the problem of light scattering of the first light emitting diode used as the low beam light by adding the lens to concentrate light and through the role of the self-contained reflective element and the light shading mechanism, the light source is clearly visible and not glaring, and the low beam light and the high beam light can be simultaneously illuminated, making the driving at night safer. The headlamp adopted with a lens type lamp head, compared with the headlamp adopted with a conventional lamp head, has the advantages of uniform brightness, strong penetrating power and small light loss, thereby obtaining the clear cut-off line to make the low beam light transparent and bright, and making the low beam light meet DOT and ECE regulations and Chinese CCC regulations and other national regulations.

3. The invention is smaller in size and simpler in structure. For this reason, the invention can be directly mounted into the H4 type standard automobile headlamp with no need to improve or redesign the original automobile assembly, the invention is simple and practical, and the service life is more than 40,000 hours, which greatly saves the cost.

BRIEF DESCRIPTION OF DRAWINGS

The above description is only an overview of the technical solution of the present disclosure. In order to make the purpose, technical solution and advantages of the present disclosure more comprehensible, and to implement in accordance with the contents of the specification, the preferred embodiments provided by the present disclosure will be further described in detail hereafter with reference to the accompanying drawings. It is obvious that the drawings in the following description are only embodiments of the present disclosure, and people having ordinary skill in the art can obtain other drawings according to the provided drawings under premise of not doing any creative work. Specific embodiments of the present disclosure are given in detail by the following embodiments and the accompanying drawings.

FIG. 1 is a schematic structural view of the vehicle lamp for replacing the H4 bulb provided by the present disclosure.

FIG. 2 is an exploded view of the vehicle lamp for replacing the H4 bulb provided by the present disclosure

FIG. 3 is a bottom view of the vehicle lamp for replacing the H4 bulb provided by the present disclosure.

FIG. 4 is a cross-sectional view of the vehicle lamp for replacing the H4 bulb provided by the present disclosure.

FIG. 5 is a schematic diagram of the light shielding mechanism of the vehicle lamp for replacing the H4 bulb provided by the present disclosure.

Wherein, the reference numerals in each drawing are as follows: 1-lens, 2-lens holder, 3-lens retaining spring, 4-reflective element, 5-first light emitting diode, 6-second light emitting diode, 7-heat sink, 8-positioning disc, 9-additional heat sink, 10-light shading mechanism.

DETAILED DESCRIPTION

The preferred implementations provided by the present disclosure will be further described in detail with reference to the accompanying drawings.

It is understood that the specific embodiments are merely used for illustrating the present disclosure and not intended to limit the scope of the present disclosure.

It shall be noted that when an element is recited as being "provided on" the other element, it can be directly or indirectly provided on the other element. When an element is recited as being "connected to" the other element, it can be directly or indirectly connected to the other element.

It shall also be noted that orientation wording, such as left, right, upper, lower, top, bottom and the like in embodiments are merely relative concepts or refer to the normal use of the product, and shall not be considered restrictive.

As shown in FIGS 1-4, a vehicle lamp for replacing an H4 bulb provided by the present disclosure comprises a first light emitting diode 5, a second light emitting diode 6, a lens 1, a reflective element 4, a heat sink 7, an additional heat sink 9 and a positioning disc 8, where the first light emitting diode 5 and the second light emitting diode 6 are respectively arranged above and below the heat sink 7, and the reflective element 4 is arranged right above the first light emitting diode 5 for reflecting light emitted by the first light emitting diode 5 and the second light emitting diode 6, the lens 1 is arranged on a front part of the heat sink 7 for refracting light emitted by the first light emitting diode 5 and the second light emitting diode 6, the additional heat sink 9 is arranged on a rear part of the heat sink 7, and is connected to the heat sink 7; the positioning disc 8 is mounted between the heat sink 7 and the reflective element 4, and the first light emitting diode 5 and the second light emitting diode 6 are electrically connected to an external driver and a power supply through a wire by passing through heat dissipation holes between the heat sink 7 and the additional heat sink 9.

Specifically, the first light emitting diode 5 and the second light emitting diode 6 are arranged asymmetrically above and below the heat sink 7, and the first light emitting diode 5 is arranged at an upper rear side of the heat sink 7. The second light emitting diode 6 is arranged at a lower rear side of the heat sink 7.

Specifically, the first light emitting diode 5 is a low beam light, and the second light emitting diode 6 is a high beam light. When the vehicle lamps are turned on, the first light emitting diode 5 is in a normally bright state and the second light emitting diode 6 is extinguishable according to a road condition, that is, the low beam light is always working while the high beam light is turned on, and the distance and the vicinity are all lightened, which ensures the safety of driving at night. It is impossible for the traditional H4 halogen lamp to achieve the integration of the low beam light and the high beam light, because lighting two filaments at the same time will cause the temperature to be too high.

Specifically, the lens 1 is mounted in a lens holder 2, and is fixed to the front part of the heat sink 7 through a lens retaining spring 3, and the lens holder 2 and the reflective member 4 are connected and fixed by a screw, the heat sink 7 and the reflective element 4 are connected and fixed by a screw and a locating pin.

Specifically, a light shielding mechanism 10 is arranged below the front end of the heat sink 7, so that the high beam light can produce a clear cut-off line, and the light type satisfies the requirements of the automobile light type and the motorcycle light type.

Specifically, a diameter of the lens 1 is less than 40 mm, the lens 7 is made of glass, PC or PMMA, and the reflective element 4 is arranged above the first light emitting diode 5, so that the light emitted by the first light emitting diode 5 is refracted through the reflective element 4 and passes through the lens 1.

The conventional automobile headlamp is not equipped with lens, and only can scatter the light through reflection, which causes the light to be unevenly distributed, and the light is illusory, the angle of the light is relatively small and difficult to control. On the headlamp, the lens is different from the ordinary mirror, and its surface is a spherical lens, whose function is to manipulate the direction of the light or to control the distribution of the light. When a beam of light hits the lens, multiple light from different directions will gather at the same point, which is called as "focus" ; and then the light will evenly scatter. This effect makes sense for the automobile headlamp. After the LED replaces the H4 bulb, it is difficult to produce a clear cut-off line of the original halogen lamp due to the change of the focus, so that some light is scattered to an angle that should not be illuminated.

The light shape of the lens is the most standard. In combination with the light shielding mechanism 10 arranged on the heat sink 7, a clear cut-off line can be obtained, and the reflective element 4 above the first light emitting diode 5 is specially designed according to the characteristics of the LED headlamp, and is consistent with the focus of the original headlamp, so that the light emitted by the low beam light is uniform and not scattered, which not only ensures high brightness, but also does not affect the normal driving of other drivers on the road, and makes the low beam light meet DOT and ECE regulations and Chinese CCC regulations and other national regulations.

In this way, by adding the lens 1 to concentrate light and the self-contained reflective element to refract light and through the role of the light-shielding mechanism on the heat sink, the problem of light scattering of the first light emitting diode used as the low beam light is effectively solved, the light source is clearly visible and not glaring; the headlamp adopted with a lens type lamp head, compared with the headlamp adopted with a conventional lamp head, has the advantages of uniform brightness, strong penetrating power and small light loss, thereby obtaining the clear cut-off line to make the low beam light transparent and bright.

Alternatively, an interface for mounting the reflective element 4 is reserved below the second light emitting diode 6, such that the reflective element is mounted as needed, and the light emitted by the second light emitting diode is refracted through the reflective element 4 or the reflective element of the original vehicle lamp.

Specifically, a light path of the the second light emitting diode is consistent with a light path of an original H4 halogen bulb when the light emitted by the second light emitting diode 6 is refracted through the reflective element of the original vehicle lamp, that is, the focus is unchanged, so that the light emitted by the high beam light is not scattered and has a long range.

Specifically, since the light emitting diodes are highly concentrated in the closed working environment of the lampshade, the heat generated is also highly concentrated, in order to achieve the purpose of heat dissipation, the reflective element 4 is made of a metal alloy material, an external surface of the reflective element is provided with an anodized heat dissipation fin, and an internal surface thereof is vacuum aluminized, the heat dissipation fin further comprises a heat resistant layer. The heat sink and the additional heat sink are made of metal alloy heat conductive material, and surfaces of the heat sink and the additional heat sink are provided with anodized heat dissipation fins.

Alternatively, room and at least one interface for mounting a cooling fan are reserved on the additional heat sink 9, and the cooling fan is added as needed, which greatly improves the heat dissipation efficiency and heat resistance of the LED headlamp.

Specifically, the working principle of the vehicle lamp for replacing the H4 bulb provided by the present disclosure is: during application, in order to use the entire headlamp as a low beam light and a high beam light, a controller and a control circuit can be utilized to control the illumination of different light emitting diodes in different states. When the LED headlamp is used as the low beam light, the first light emitting diode 5 is illuminated to form an upper side light source group, and the self-contained reflective element 4 and the lens 1 and the shading mechanism 10 are used to form a light source of the low beam light with a clear cut-off line; when the LED headlamp is used as the high beam light, the second light emitting diode 6 is illuminated to form a lower side light source group, the reflective element of the original headlamp or the self-contained reflective element are used to form a light source of the high beam light. A height of the product's light center is the same as that of the original tungsten filament bulb. The light type is more comprehensive and the luminous effect is good.

The automobile headlamp of the invention replaces the traditional H4 halogen bulb with the LED lamp bead. As a new light source, the light emitting diode has the advantages of long service life, saving energy, good light quality, simple structure, fast response, low voltage and small volume. Compared with the traditional H4 halogen lamp, the brightness is increased by more than 80%, and the shortcomings of low luminous efficiency and power consumption are overcome, thereby achieving the purpose of saving power and energy; the problem of the light scattering of the first light emitting diode used as the low beam light is effectively solved by adding the lens to concentrate light, and through the role of the self-contained reflective element and the light shading mechanism, the light source is clearly visible and not glaring, and the low beam light and the high beam light can be simultaneously illuminated, making the driving at night safer. The headlamp adopted with a lens type lamp head, compared with the headlamp adopted with a conventional lamp head, has the advantages of uniform brightness, strong penetrating power and small light loss, thereby obtaining the clear cut-off line to make the low beam light transparent and bright, and making the low beam light meet DOT and ECE regulations and Chinese CCC regulations and other national regulations; at the same time, the volume is smaller, and the structure is simpler. For this reason, the present disclosure can be directly mounted into the H4 type standard automobile headlamp with no need to improve or redesign the original automobile assembly, the invention is simple and practical, and the service life is more than 40,000 hours, which greatly saves the cost.

The above description is merely the preferred embodiment of the present disclosure, and it is obvious that the implementation of the present disclosure is not limited to the above manner, as long as adopting any modification, equivalent replacement and improvement through the method concept and technical solution of the present disclosure, or directly applying the concept and technical solution of the present disclosure to other occasions without modification shall be included in the protection scope of the present disclosure.

Claims

A vehicle lamp for replacing an H4 bulb, characterized by comprising a first light emitting diode, a second light emitting diode, a lens, a reflective element, a heat sink, an additional heat sink, and a positioning disc; the first light emitting diode and the second light emitting diode are respectively arranged above and below the heat sink; the reflective element is arranged right above the first light emitting diode and the second light emitting diode for reflecting light emitted by the first light emitting diode and the second light emitting diode; the lens is arranged on a front part of the heat sink for refracting light emitted by the first light emitting diode and the second light emitting diode; the additional heat sink is arranged on a rear part of the heat sink, and is connected to the heat sink; the positioning disc is arranged between the heat sink and the additional heat sink; the first light emitting diode and the second light emitting diode are electrically connected with an external driver and a power supply through a wire by passing through heat dissipation holes located between the heat sink and the additional heat sink.
The vehicle lamp according to claim 1, characterized in that the first light emitting diode and the second light emitting diode are respectively arranged asymmetrically along an upper part and a lower part of the heat sink; the first light emitting diode is arranged at an upper rear side of the heat sink, and the second light emitting diode is arranged at a lower rear side of the heat sink; a distance between the second light emitting diode and the positioning disc is the same as the distance between the high beam lamp and the reference plane in the H4 bulb.
The vehicle lamp according to claim 1, characterized in that a diameter of the lens is less than 40 mm, and the lens is made of glass, PC or PMMA; the reflective element is arranged above the first light emitting diode such that light emitted by the first light emitting diode is refracted through the reflective element and passes through the lens.
The vehicle lamp according to claim 1, characterized in that an interface for mounting the reflective element is reserved below the second light emitting diode; light emitted by the second light emitting diode is refracted through the reflective element or a reflective element of an original vehicle lamp; and a light path of the the second light emitting diode is consistent with a light path of an original H4 halogen bulb when light emitted by the second light emitting diode is refracted through the reflective element of the original vehicle lamp.
The vehicle lamp according to claim 1, characterized in that a light shielding mechanism is arranged below a front end of the heat sink such that a high beam light produces a clear cut-off line.
The vehicle lamp according to claim 1, characterized in that the reflective element is made of a metal alloy material; an external surface of the reflective element is provided with an anodized heat dissipation fin; and an internal surface of the reflective element is vacuum aluminized; the heat dissipation fin further comprises a heat resistant layer.
The vehicle lamp according to claim 1, characterized in that the first light emitting diode is illuminated to be used as a low beam light, and the second light emitting diode is illuminated to be used as a high beam light; the first light emitting diode is in a normally bright state and the second light emitting diode is extinguishable according to a road condition.
The vehicle lamp according to claim 1, characterized in that the lens is mounted in a lens holder, and is fixed to the front end of the heat sink through a lens retaining spring.
The vehicle lamp according to claim 1, characterized in that the heat sink and the additional heat sink are made of metal alloy heat conductive material; and surfaces of the heat sink and the additional heat sink are provided with anodized heat dissipation fins.
The vehicle lamp according to claim 1, characterized in that room and at least one interface for mounting cooling fan are reserved on the additional heat sink.