CN213542369U - Automobile signal lamp optical system - Google Patents

Abstract

The utility model provides an automobile signal lamp optical system, including LED light source, light guide and coloring device, the LED light source sets up the focus department at the light guide, the place ahead part of the A-A section profile of light guide is the shape of circular or oval or rectangle or thin slice, lets light propagate to the tail end through the total reflection from the head end in the light guide, and the rear part is the reflection of light face, coloring device sets up the place ahead at the light guide exit face to coloring device's area needs to be greater than or cover the exit face of whole root light guide, and coloring device's tone is along the gradual change of light advancing direction, and gradual change trend and light guide yellow trend become complementary relation, filter the miscellaneous light in the light guide through coloring device, realize the even unanimous effect of lighting of light guide head and the tail, it is more pleasing to the eye.

Description

Automobile signal lamp optical system

Technical Field

The utility model relates to an automotive lighting field especially relates to an automotive signal lamp optical system.

Background

With the continuous development of automobile lamp technology, the appearance of the lamp is gradually changed, more and more consumers and whole automobile customers have unprecedented higher requirements on the automobile lamp, and especially the requirement on the lighting effect of the lamp is more and more strict, so that the lighting integral uniformity is more attractive and more consistent. In order to realize a very compact lamp structure model, manufacturers develop a light source and a light guide device, light beams emitted from the light source are transmitted into the light guide, the light is transmitted forwards in the light guide through total emission, partial light rays enter a rear optical surface in the transmission process, the optical surface refracts the light rays to a front emergent surface, and surrounding vehicles can see the light rays of the light guide emergent surface.

However, the light guide has the property of transmitting white light by attenuating the white light as it propagates, the light beam transmitted through the light guide has the property of different colors in the advancing direction along the light guide depending on the distance to the light source, the material from which the light guide is made is mainly a thermoplastic material, preferably made of polymethyl methacrylate (PMMA) or Polycarbonate (PC), which have a greater ability to absorb the blue component of the white light than the yellow and red components of the white light, so that the longer the distance the white light propagates in the light guide, the more the tail of the light guide inevitably produces a yellowish hue with respect to the head.

Vehicle manufacturers desire light guides that have consistent end-to-end tint, which can result in an unaesthetic appearance to the user if the light guide is not uniform in end-to-end tint. In the past, mould suppliers optimize the yellowing problem by optimizing light guide injection molding parameters, but a thin light guide with the diameter less than 6mm and a long light guide with the length more than 600mm can only improve the tail yellowing of the light guide by optimizing the injection molding parameters, and the tail yellowing problem cannot be completely eliminated.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing an automobile signal lamp optical system filters the miscellaneous light in the light guide through the color applicator, realizes the even unanimous effect of lighting from beginning to end of light guide, and is more pleasing to the eye.

The utility model provides an automobile signal lamp optical system, including LED light source, light guide, colouring device, the LED light source sets up in the focus department of light guide, colouring device sets up the place ahead at the exit surface of light guide, the LED light source provides light energy, preferably is emitting diode for optical system, the light guide is made by transparent plastics, this kind of transparent plastics is polymethyl methacrylate (PMMA) or Polycarbonate (PC) preferably, here, the place ahead part of the side section profile of light guide is circular or oval or the shape of rectangle, lets light propagate from the head end to the tail end through the total reflection in the light guide, the rear part is the plane of reflection, be provided with the optical pattern on the light guide, be used for destroying the total reflection of partial light, make partial light in the light guide can be by the outgoing of light guide front surface, form emergent light to light the whole region of light guide, the light guide has the characteristic of transmitting white light by attenuating the white light when the white light is transmitted, particularly, along the light advancing direction, the light guide gradually absorbs blue components in the white light, so that the tail part of the light guide becomes yellow, the coloring device is a filter, such as an optical filter, the optical filter is made of plastic or glass sheet and is added with special dye, the yellow optical filter only allows yellow light to pass, and the like, the blue optical filter only allows blue light to pass, because the molecular structure of the transparent glass sheet (plastic sheet) is changed after the dye is dyed, so that the refractive index is changed, the transmissivity of certain color light is changed, and further the light guide can be used for filtering light with certain wavelength, such as adding a blue-biased filter to the tail part of the yellow light guide, redundant yellow light is filtered, blue light normally passes, so that the proportion of the yellow component and the blue component in the emergent light is white, the tail part of the light guide displays white, the coloring device is arranged in front of the light guide emitting surface, the area of the coloring device needs to be larger than or cover the emitting surface of the whole light guide, the color tone of the coloring device is gradually changed along the light advancing direction, the gradual change trend and the light guide yellowing trend are in a complementary relation, and the colors of the emergent light of the head part and the tail part of the light guide are uniform. Preferably, the shape of the gradually-changing complementary filter can be preferably consistent with the inner lens of the vehicle lamp, or a filter film is attached to the inner lens, so that the space can be saved, and the design shape of the vehicle of a customer can be guaranteed.

The further improvement lies in that: the coloring means may be placed only in the tail area, since only a very short area of the tail will generally yellow when the light guide is short, so that the coloring means need only be placed in the tail area.

The further improvement lies in that: the profile for the light guide may be round, oval, square or a flat sheet in the front area.

The further improvement lies in that: on the basis of improving the yellowing of the tail part of the light guide through the coloring device, the auxiliary LED light source is added at the tail part of the light guide, the light energy of the tail part area of the light guide is improved through the auxiliary LED light source, and the yellowing of the tail part is further improved.

The further improvement lies in that: on the basis of improving the yellowing of the tail part of the light guide through the coloring device, a series of extended light sources are arranged on the tail part of the light guide in parallel to the driving direction of a vehicle, the extended light sources are preferably at least one group of LED light sources and are matched with the light reflecting bowl, and the yellowing of the tail part of the light guide is improved by improving the light energy of the tail part of the light guide.

The utility model has the advantages that: the light guide is provided with the light filter, the color tone of the light filter gradually changes along the light advancing direction, the gradual change trend and the light guide yellowing trend are in a complementary relationship, the tail yellowing of the light guide is improved, and the head and tail colors of the light guide are consistent and uniform, so that the light guide is more attractive.

Drawings

Fig. 1 is a schematic front view of an embodiment of the present invention.

Fig. 2 is a schematic sectional view of a-a according to an embodiment of the present invention.

Fig. 3 is a schematic front view of an embodiment of the present invention.

Fig. 4 is a schematic front view of the embodiment of the present invention.

Fig. 5 is a schematic front view of the embodiment of the present invention.

Wherein: 1-LED light source, 2-light guide, 3-coloring device, 4-light advancing direction, 5-reflecting surface behind light guide, 6-emergent light in front of light guide, 12-auxiliary LED light source, 71-extended light source.

Detailed Description

In order to deepen the understanding of the present invention, the present invention will be described in detail with reference to the following embodiments, which are only used for explaining the present invention and do not constitute the limitation of the protection scope of the present invention.

The first embodiment is as follows:

as shown in fig. 1, the present embodiment provides an optical system for an automotive signal lamp, comprising an LED light source 1, a light guide 2, a coloring means 3, said LED light source 1 providing light energy for the optical system, preferably a light emitting diode, said light guide 2 being made of a transparent plastic, preferably Polymethylmethacrylate (PMMA) or Polycarbonate (PC), wherein, as shown in fig. 2, the front portion of the a-a cross-sectional profile of said light guide 2 is in the shape of a circle or an ellipse or a rectangle or a thin plate, allowing the light to propagate within the light guide to the rear portion by total reflection, and the rear portion is a light reflecting surface 5 on which an optical pattern is disposed by optical design, which is used to destroy the total reflection of part of the light, allowing part of the light within the light guide 2 to exit from the front surface of the light guide, thereby lighting the whole area of the light guide 2, the light guide 2 has the property of transmitting white light by attenuating the white light when the white light is transmitted, in particular, along the light advancing direction 4, the light guide 2 gradually absorbs the blue component in the white light, so that the tail part of the light guide 2 is yellowed, the coloring device 3 is a filter, such as a filter, which is made of plastic or glass and is added with special dyes, the yellow filter can only allow yellow light to pass through, and so on, the blue filter can only allow blue light to pass through, because the transparent glass (plastic sheet) is dyed with dyes, the molecular structure changes to cause refractive index changes, the transmissivity of certain color light changes, and the filter can be used for filtering light with certain wavelength, such as adding a bluish filter to the tail part of the yellowish light guide, the redundant yellow light is filtered and normally passes through, so that the proportion of the yellow component and the blue component in the emergent light is white, i.e. the tail of the light guide is displayed as white, and the coloring device 3 covers the whole light guide 2, the color tone of the coloring device 3 is gradually changed along the light advancing direction 4, the gradual change trend and the light guide yellowing trend are in a complementary relationship, so that the colors of the emergent light of the head and the tail of the light guide are uniform.

Preferably, the shape of the gradually-changing complementary filter can be preferably consistent with the inner lens of the vehicle lamp, or a filter film is attached to the inner lens, so that the space can be saved, and the design shape of the vehicle of a customer can be guaranteed.

Example two:

as shown in fig. 3, the present embodiment is different from the first embodiment in that: the coloring means 3 are placed in the area of the tail of the light guide, so that the coloring means 3 need only be placed in the area of the tail, since when the light guide is short, typically only a very short area of the tail will yellow.

Example three:

as shown in fig. 4, the present embodiment is different from the first embodiment in that: on the basis of improving the tail part yellowing of the light guide through the coloring device 3, the auxiliary LED light source 12 is additionally arranged at the tail part of the light guide, the light energy of the tail part area of the light guide is improved through the auxiliary LED light source 12, the tail part yellowing is further improved, the scheme can improve the color yellowing of the tail part of the light guide and can also improve the brightness of the tail part, and the whole lighting effect of the light guide is uniform and consistent in color and brightness.

Example four:

as shown in fig. 5, the present embodiment is different from the first embodiment in that: on the basis of improving the yellowing of the tail part of the light guide through the coloring device 3, a series of extended light sources 71 are arranged on the tail part of the light guide in parallel to the driving direction of the vehicle, the extended light sources 71 are preferably matched with an LED light source and a reflecting bowl, and the yellowing of the tail part of the light guide is improved by improving the light energy of the tail part of the light guide.

Claims (5)

1. An automotive signal light optical system comprising an LED light source (1), a light guide (2) and a coloring device (3), characterized in that: the LED light source (1) is arranged at the focus of the light guide (2), the coloring device (3) is arranged in front of the emitting surface of the light guide (2), the front part of the side section outline of the light guide (2) is in a circular or elliptical or rectangular shape, light rays are transmitted from the head end to the tail end in the light guide through total reflection, the rear part is a reflecting surface (5), the light guide (2) is provided with an optical pattern for destroying the total reflection of partial light rays, partial light rays in the light guide (2) can be emitted from the front surface of the light guide to form emergent light rays (6), so that the whole area of the light guide (2) is lightened, the light guide (2) has the characteristic of transmitting white light by attenuating the white light during the transmission, and the light guide (2) gradually absorbs blue components in the white light along the light advancing direction (4) to enable the tail part of the light guide (2) to turn yellow, the coloring device (3) is a light filter, the coloring device (3) covers the exit surface of the whole light guide (2), the color tone of the coloring device (3) is gradually changed along the light advancing direction (4), and the gradual change trend and the light guide yellowing trend are in a complementary relation, so that the colors of the light emitted from the head and the tail of the light guide are uniform.

2. An automotive signal light optical system according to claim 1, characterized in that: the shape of the coloring device (3) is consistent with that of an inner lens of the car lamp, or a layer of light filtering film is pasted on the inner lens.

3. An automotive signal light optical system according to claim 1, characterized in that: the coloring device (3) is only arranged at the tail area.

4. An automotive signal light optical system according to claim 1, characterized in that: on the basis of improving the tail yellowing of the light guide (2) through the coloring device (3), an auxiliary LED light source (12) is added at the tail of the light guide (2), and the light energy of the tail area of the light guide (2) is improved through the auxiliary LED light source (12), so that the tail yellowing is further improved.

5. An automotive signal light optical system according to claim 1, characterized in that: on the basis of improving the tail yellowing of the light guide (2) through the coloring device (3), a series of extended light sources (71) are arranged at the tail of the light guide (2) in parallel to the vehicle running direction, the extended light sources (71) are at least one group of light sources and are matched with a light reflecting bowl, and the tail yellowing of the light guide (2) is improved by improving the tail light energy of the light guide (2).

Images