KR102289744B1 - Vehicle lamp providing flat light - Google Patents

Abstract

A vehicle lamp according to an embodiment of the present invention includes a light source, an outer lens for protecting the light source from the outside, and an inner lens provided between the light source and the outer lens, wherein the inner lens is emitted from the light source and the The light passing through the outer lens is formed on at least one of the incident surface and the exit surface, and the incident surface and the exit surface, and scatters the light passing through the inner lens so that the light passing through the inner lens is formed on the exit surface. It includes a light diffusion pattern that allows the light to be emitted with uniform luminance from the front side.

Description

Surface-emitting vehicle lamps {Vehicle lamp providing flat light}

The present invention relates to a surface light emitting vehicle lamp, and more particularly, to a vehicle lamp providing surface light emission in which light of uniform luminance is emitted in a predetermined area.

Recently, semiconductor light emitting devices such as LEDs (Light Emitting Diodes) have been used not only for indoor lighting of vehicles but also for light sources of lamps irradiated to the outside of the vehicle.

Semiconductor light emitting devices are favored because of their high luminous efficiency compared to power and long lifespan compared to conventional halogen lamps. However, the semiconductor light emitting device has a disadvantage in that it is difficult to provide uniform luminance and luminance over a wide area because a light irradiation angle is narrow due to light output characteristics having straightness.

In order to compensate for such disadvantages of the semiconductor light emitting device, a plurality of semiconductor light emitting devices are arranged in one or two dimensions to be used as a light source, or a single or a plurality of semiconductor light emitting devices are disposed in the light emission direction of the semiconductor light emitting device to emit light from the semiconductor light emitting device. A light diffuser plate is used to diffuse the light to reduce the luminance deviation of the light.

A generally used diffusion plate is made of a polymer member such as a polycarbonate sheet (Polycarbonate, PC) or polyethylene terephthalate (PET). In addition, in order to improve light diffusion efficiency, glass fibers are mixed in a polymer diffusion plate.

However, in some countries, the use of glass fibers in vehicles or home appliances is prohibited in order to prevent environmental pollution that occurs when vehicles and home appliances are disposed of.

Recently, optical design of vehicle lamps prefer to implement partial or total surface light emission, but it is not easy to implement a direct-type surface light-emitting body when a diffusion plate mixed with glass fibers is not used.

An object of the present invention is to provide a vehicle lamp that increases light diffusion efficiency and implements surface light emission without using glass fibers.

The problems of the present invention are not limited to the problems mentioned above, and other problems not mentioned will be clearly understood by those skilled in the art from the following description.

A vehicle lamp according to an embodiment of the present invention for solving the above problems includes a light source, an outer lens for protecting the light source from the outside, and an inner lens provided between the light source and the outer lens, the inner lens, It is formed on at least one of an incident surface and an exit surface, and the incident surface and the exit surface, through which light emitted from the light source and traveling to the outer lens passes, and scatters the light passing through the inner lens to pass through the inner lens and a light diffusion pattern for allowing light to be emitted with uniform luminance from the front surface of the emission surface.

According to an embodiment, the light diffusion pattern may include a plurality of fine dots that are recessed toward the inner side of the inner lens.

According to an embodiment, the light diffusion pattern may be formed of a plurality of fine dots protruding toward the outside of the inner lens unit.

According to an embodiment, the light diffusion pattern may include a free pattern in which at least some of the plurality of fine dots are distributed in an irregular pattern.

According to an embodiment, the light diffusion pattern includes a high-density pattern in which some of the plurality of fine dots are disposed adjacent to each other, and another portion of the plurality of fine dots in a direction away from the high-density pattern. It may include a low-density pattern arranged to be lowered.

According to an embodiment, the light source may be a point light source, and the point light source may be arranged such that light emitted from the point light source is concentrated in the high-density pattern.

According to an embodiment, in the light diffusion pattern, the high-density pattern is continuously arranged at regular intervals, the low-density pattern includes a pattern arranged between the continuous high-density patterns, and the light source is the continuous It may include a plurality of point light sources corresponding to the high-density patterns one-to-one.

A vehicle lamp according to another embodiment of the present invention includes a light source, an outer lens for protecting the light source from the outside, and an inner lens provided between the light source and the outer lens, wherein the inner lens includes an incident surface and a sub-emission A first diffusion lens having a surface formed thereon, a second diffusion lens having an exit surface and a sub-incident surface facing the sub-emitting surface, a first light diffusion pattern formed on at least one of the incident surface and the sub-emitting surface, and the first light diffusion pattern 2 A light diffusion pattern including a second light diffusion pattern formed on at least one of the exit surface and the sub-incident surface of the diffusion lens so that light passing through the inner lens is emitted with uniform luminance from the front surface of the emission surface includes

According to an embodiment, the first light diffusion pattern is formed of a plurality of first fine dots that are recessed toward the inside of the first light diffusion lens or protrude toward the outside of the first light diffusion lens, The second light diffusion pattern may include a plurality of second fine dots that are recessed toward the inside of the second light diffusion lens or protrude toward the outside of the second light diffusion lens.

According to an embodiment, the first light diffusion pattern may include a high-density pattern in which some of the plurality of first fine dots are disposed adjacent to each other, and a high-density pattern in which other portions of the plurality of first fine dots are separated from the high-density pattern. It may include a low-density pattern disposed so that the density is gradually lowered in the direction.

According to an embodiment, the second light diffusion pattern may include a free pattern in which at least some of the plurality of second fine dots are distributed in an irregular pattern.

According to an embodiment, the light source may be a point light source, and the point light source may be arranged such that light emitted from the point light source is concentrated in the high-density pattern.

According to an embodiment, the first light diffusion pattern includes a pattern in which the high-density pattern is continuously disposed at regular intervals, the low-density pattern includes a pattern disposed between the consecutive high-density patterns, and the light source is, It may include a plurality of point light sources corresponding to successive high-density patterns one-to-one.

According to an embodiment, in each of the first light diffusion pattern and the second light diffusion pattern, at least a portion of the plurality of first fine dots and at least a portion of the plurality of second fine dots are distributed in an irregular pattern. It may include free patterns that

Other specific details of the invention are included in the detailed description and drawings.

According to the embodiments of the present invention, there are at least the following effects.

Surface light emission can be realized without using additional impurities such as glass fibers.

Accordingly, it is possible to provide a more eco-friendly vehicle lamp that does not use glass fiber, which is an environmental regulation target.

The effect according to the present invention is not limited by the contents exemplified above, and more various effects are included in the present specification.

1 is a diagram schematically illustrating a vehicle lamp according to a first embodiment of the present invention.
2 is a diagram schematically illustrating a vehicle lamp according to a second embodiment of the present invention.
3 is a front view schematically illustrating an example of surface light emission by an inner lens of a vehicle lamp according to the first or second embodiment of the present invention.
4 is a front view showing the inner lens according to the first embodiment of the present invention.
5 is a side view illustrating an inner lens according to a first embodiment of the present invention.
6 is a side view illustrating an inner lens according to a second embodiment of the present invention.
7 is a side view illustrating an inner lens according to a third embodiment of the present invention.
8 is a front view illustrating an inner lens according to a fourth embodiment of the present invention.
9 is a side view illustrating an arrangement relationship between an inner lens and a light source according to a fourth embodiment of the present invention.
10 is a graph illustrating a comparison between the luminance distribution of light emitted from a light source and the luminance distribution of light passing through the inner lens according to the fourth embodiment of the present invention.
11 is an exploded perspective view illustrating an inner lens according to a fifth embodiment of the present invention.
12 is an exploded perspective view illustrating an inner lens according to a sixth embodiment of the present invention.

Advantages and features of the present invention and methods of achieving them will become apparent with reference to the embodiments described below in detail in conjunction with the accompanying drawings. However, the present invention is not limited to the embodiments disclosed below, but may be implemented in various different forms, and only these embodiments allow the disclosure of the present invention to be complete, and common knowledge in the art to which the present invention pertains It is provided to fully inform those who have the scope of the invention, and the present invention is only defined by the scope of the claims. Like reference numerals refer to like elements throughout.

In addition, the embodiments described herein will be described with reference to cross-sectional and/or schematic diagrams that are ideal illustrative views of the present invention. Accordingly, the form of the illustrative drawing may be modified due to manufacturing technology and/or tolerance. In addition, in each of the drawings shown in the present invention, each component may be enlarged or reduced to some extent in consideration of convenience of description. Like reference numerals refer to like elements throughout.

Hereinafter, the present invention will be described with reference to the drawings for explaining a vehicle lamp according to embodiments of the present invention.

1 is a diagram schematically illustrating a vehicle lamp according to a first embodiment of the present invention.

As shown in FIG. 1 , the vehicle lamp 1 according to the first embodiment of the present invention includes a light source 10 , an inner lens 20 , and an outer lens 30 .

The vehicle lamp 1 according to the first embodiment of the present invention is a lamp installed inside a vehicle to provide interior lighting, a head lamp or a fog lamp installed outside the vehicle to provide lighting, or a lamp outside the vehicle. It may be a rear lamp that is installed and provides a signal.

As the light source 10 , a semiconductor light emitting device such as a light emitting diode (LED) or a laser diode (LD) may be used.

The outer lens 30 is a lens that protects the internal components of the vehicle lamp 1, such as the light source 10, from the external environment of the vehicle lamp 1, and the light of the light source 10 transmitted through the inner lens 20 is It may be formed of a light-transmitting or semi-transmissive material so that it can be observed from the outside of the lamp 1 .

The inner lens 20 is a component that scatters the light emitted from the light source 10 so that the light of the surface emission pattern is emitted. A detailed description of the inner lens 20 will be described later.

As shown in FIG. 1 , the vehicle lamp 1 according to the first embodiment of the present invention has a direct light structure in which the light emitted from the light source 10 is directly irradiated toward the inner lens 20 .

Meanwhile, FIG. 2 is a diagram schematically illustrating a vehicle lamp according to a second embodiment of the present invention. For convenience of description, parts similar to those of the first embodiment use the same reference numerals, and descriptions of parts common to the first embodiment are omitted.

As shown in FIG. 2 , the vehicle lamp 2 according to the second embodiment of the present invention further includes a reflector 40 in addition to the light source 10 , the inner lens 20 and the outer lens 30 . .

Compared to the vehicle lamp 1 according to the second embodiment of the present invention, the vehicle lamp 1 according to the second embodiment of the present invention has a direct light structure in which the light emitted from the light source 10 is directly irradiated toward the inner lens 20 . (2) has a reflective structure in which light emitted from the light source 10 is reflected by the reflector 40 and passes through the inner lens 20 .

The reflective surface of the reflector 40 may be formed in an elliptical or parabolic shape, or may be formed in an MFR type reflective surface having a multifocal shape.

1 and 2, the inner lens 20 applied to the vehicle lamps 1 and 2 according to the embodiments of the present invention is emitted from the light source 10 and proceeds to the outer lens 30. disposed on the optical path.

3 is a front view schematically illustrating an example of surface light emission by an inner lens of a vehicle lamp according to the first or second embodiment of the present invention.

As shown in FIG. 3 , the inner lens 20 scatters light passing through the inner lens 20 , so that the light of the surface emitting pattern is transmitted from the outside of the vehicle lamps 1 and 2 through the outer lens 30 . to be observed.

Hereinafter, the inner lens 20 according to embodiments of the present invention will be described.

4 is a front view illustrating the inner lens according to the first embodiment of the present invention, and FIG. 5 is a side view illustrating the inner lens according to the first embodiment of the present invention.

As shown in FIG. 4 , the inner lens 21 according to the first embodiment of the present invention may include a light diffusion pattern of a free pattern in which at least some of the plurality of fine dots 215 are distributed in an atypical pattern. can The atypical free pattern refers to a pattern in which the plurality of fine dots 215 are located at randomly determined positions without a specific rule in the pattern in which the plurality of fine dots 215 are distributed.

Alternatively, the inner lens 21 according to the first embodiment of the present invention may include a light diffusion pattern of a regular pattern in which at least some of the plurality of fine dots 215 are distributed according to a predetermined rule.

As shown in FIG. 5 , the plurality of fine dots 215 are formed of engraved hemispheres 215a that are recessed inside the inner lens 21 .

5 illustrates an example in which a plurality of fine dots 215 are formed on the incident surface 212 of the inner lens 21 , but the plurality of fine dots 215 are formed on the exit surface 211 of the inner lens 21 . Some of the plurality of fine dots 215 may be formed on the incident surface 212 of the inner lens 21 , and others may be formed on the exit surface 211 of the inner lens 21 . .

In addition, although the intaglio hemispheres 215a are illustrated as examples of the plurality of fine dots 215 in FIG. 5 , the plurality of fine dots 215 may include an intaglio polyhedron.

The light diffusion pattern composed of a plurality of fine dots 215 formed in an intaglio scatters light by refracting light passing through the inner lens 20 from the light source 10 (refer to FIG. 1 or FIG. 2 ) at various angles. As a result, light emitted through the emission surface 211 forms a surface emission pattern having approximately uniform luminance on the entire surface of the emission surface 211 (refer to FIG. 3 ).

Therefore, the inner lens 20 according to the present embodiment can implement surface light emission using a light diffusion pattern composed of a plurality of fine dots 215 without using a separate impurity such as glass fiber. As a result, it is possible to provide a more eco-friendly vehicle lamp that does not use glass fiber, which is subject to environmental regulations.

The inner lens 21 is made of a transparent or translucent light-transmitting material such as polycarbonate (PC), polyethylene terephthalate (PET), polymethyl methacrylate (PMMA), acrylic, epoxy, melamine resin, etc. It may be formed of a resin material. In this case, the plurality of fine dots 215 may be embossed on the mold for molding the inner lens 21 , and may be formed simultaneously with the molding of the inner lens 21 . Alternatively, after molding the inner lens 21 having a smooth incident surface 212 and an output surface 211 , a plurality of intaglio fine dots 215 on at least one of the incident surface 212 and the exit surface 211 . may form

Hereinafter, an inner lens according to a second embodiment of the present invention will be described. For convenience of description, parts similar to those of the inner lens according to the first embodiment use the same reference numerals, and descriptions of parts common to the inner lens according to the first embodiment will be omitted.

6 is a side view illustrating an inner lens according to a second embodiment of the present invention.

As shown in FIG. 6 , the inner lens 22 according to the second embodiment of the present invention includes embossed hemispheres 215b protruding to the outside of the inner lens 22 .

The embossed hemispheres 215b form a plurality of fine dots 215 shown in FIG. 4 , and the inner lens 22 according to the second embodiment of the present invention is also shown in FIG. 4 , with a plurality of fine dots At least some of the 215 may include a light diffusion pattern of a free pattern distributed in an irregular pattern. Accordingly, the plurality of fine dots 215 may be distributed to have an atypical pattern over the entire surface of the inner lens 22 , or may be distributed to have an atypical pattern in some areas and a regular pattern in some other areas. Alternatively, at least some of the plurality of fine dots 215 may include a light diffusion pattern arranged in a regular pattern.

That is, in the inner lens 21 according to the first embodiment described above, a light diffusion pattern of a free pattern (refer to FIG. 4 ) is formed using the intaglio hemispheres 215a, whereas the inner lens 22 according to the present embodiment is formed. forms a light diffusion pattern of a free pattern (refer to FIG. 4) using the embossed hemispheres 215b.

Also in this embodiment, the plurality of fine dots 215 may be formed on the exit surface 211 of the inner lens 22 , and some of the plurality of fine dots 215 may be formed on the entrance surface 212 of the inner lens 22 . ) and another part may be formed on the emitting surface 211 of the inner lens 22 .

Also, although embossed hemispheres 215b are illustrated as examples of the plurality of fine dots 215 in FIG. 6 , the plurality of fine dots 215 may include an embossed polyhedron.

Hereinafter, an inner lens according to a third embodiment of the present invention will be described. For convenience of description, parts similar to those of the inner lens according to the first embodiment use the same reference numerals, and descriptions of parts common to the inner lens according to the first embodiment will be omitted.

7 is a side view illustrating an inner lens according to a third embodiment of the present invention.

As shown in FIG. 7 , the inner lens 23 according to the third embodiment of the present invention has intaglio hemispheres 215a recessed inside the inner lens 23 and the inner lens 23 to the outside. It includes embossed hemispheres 215b that are formed to protrude.

The engraved hemispheres 215a and the embossed hemispheres 215b form a plurality of fine dots 215 shown in FIG. 4 , and the inner lens 23 according to the third embodiment of the present invention is also shown in FIG. 4 . As described above, at least some of the plurality of fine dots 215 may include a light diffusion pattern of a free pattern distributed in an irregular pattern. Accordingly, the plurality of fine dots 215 may be distributed to have an atypical pattern over the entire surface of the inner lens 23 , or may be distributed to have an atypical pattern in some areas and a regular pattern in some other areas. Alternatively, at least some of the plurality of fine dots 215 may include a light diffusion pattern arranged in a regular pattern.

In this embodiment as well, the engraved hemispheres 215a and the embossed hemispheres 215b may be mixed and formed on the exit surface 211 of the inner lens 23 , some of which are the entrance surface of the inner lens 23 . It is formed on the 212 and the other part may be formed on the emission surface 211 of the inner lens 23 .

In addition, although engraved hemispheres 215a and embossed hemispheres 215b are illustrated as examples of the plurality of fine dots 215 in FIG. may include

Hereinafter, an inner lens according to a fourth embodiment of the present invention will be described. For convenience of explanation, parts similar to the inner lens according to the first, second, and third embodiments use the same reference numerals, and descriptions of parts common to the inner lens according to the first, second and third embodiments will be omitted. .

8 is a front view illustrating an inner lens according to a fourth embodiment of the present invention.

As shown in Fig. 8, the inner lens 24 according to the fourth embodiment of the present invention has a different light diffusion pattern from the first, second and third embodiments described above.

The light diffusion pattern of the inner lens 24 according to the fourth embodiment of the present invention includes a high-density pattern 241 in which a plurality of fine dots 243 are disposed adjacent to each other, and a plurality of different periphery of the high-density pattern 241 . and a low-density pattern 242 in which fine dots 244 of are disposed.

The density of the plurality of fine dots 244 forming the low-density pattern 242 is lower than the density of the plurality of fine dots 243 forming the high-density pattern 241 . In addition, the low-density pattern 242 may have a pattern in which the density of the plurality of fine dots 244 is approximately decreased as the distance from the high-density pattern 241 increases.

In addition, in the light diffusion pattern of the inner lens 24 according to the embodiment of the present invention, high-density patterns 241 are continuously disposed at regular intervals, and low-density patterns 242 are disposed between consecutive high-density patterns 241 . do.

A plurality of fine dots 243 and 244 forming the high-density pattern 241 or the low-density pattern 242 may be formed on the incident surface 212 (refer to FIG. 9 ) and the exit surface 211 of the inner lens 24. . And, similarly to the description of the inner lenses 21, 22, and 23 according to the first, second, and third embodiments described above, the plurality of fine dots 243 and 244 are formed by being depressed inside the inner lens 24. The embossed hemispheres 215a and/or the embossed hemispheres 215b protruding outward of the inner lens 23 may be included. In addition, the plurality of fine dots 243 and 244 may include an engraved polyhedron and/or an embossed polyhedron in addition to the intaglio hemisphere 215a or the embossed hemisphere 215b (refer to FIG. 9 ).

9 is a side view illustrating the arrangement relationship between the inner lens and the light source according to the fourth embodiment of the present invention, and FIG. 10 is the luminance distribution of the light emitted from the light source and the inner lens according to the fourth embodiment of the present invention. It is a graph showing a comparison of the luminance distribution of light passing through.

As shown in FIG. 9 , the vehicle lamp 1 (refer to FIG. 1 ) according to the first embodiment of the present invention may include a plurality of point light sources 11 , 12 , and 13 .

The plurality of point light sources 11 , 12 , and 13 are provided in a one-to-one correspondence with the plurality of high-density patterns 241 formed on the inner lens 24 , respectively, and each of the point light sources 11 , 12 , 13 has each of the high-density patterns 241 , respectively. It may be positioned adjacent to the pattern 241 .

A semiconductor light emitting device such as a light emitting diode (LED) or a laser diode (LD) may be used as the point light sources 11 , 12 , and 13 of FIG. 9 . The semiconductor light emitting device has a light output characteristic having straightness. Therefore, as shown in the light source luminance distribution A1 of FIG. 10 , the point light sources 11, 12, and 13 emit high-brightness light to the central axis of the light source, but the luminance increases as the distance from the central axis of the light source increases. A rapidly decreasing light is emitted.

The inner lens 24 according to the fourth embodiment of the present invention includes a light diffusion pattern in which a high-density pattern 241 and a low-density pattern 242 are formed in consideration of the light output characteristics of the semiconductor light emitting device.

That is, the central axis of the point light sources 11, 12, 13 and the high-density pattern 241 are approximately coincident, and the high-intensity light emitted adjacent to the central axis of the light source passes through the high-density pattern 241, and the light source Light of low luminance, which is spaced apart from the central axis of , and emitted, passes through the low-density pattern 242 .

The light passing through the high-density pattern 241 is scattered more than the light passing through the low-density pattern 242 to lower the luminance in the region where the high-density pattern 241 is formed, and at the same time, the low-density pattern around the high-density pattern 241 ( 242) to improve the luminance of the part. In addition, light passing through the low-density pattern 242 passes through the inner lens 24 without being largely scattered compared to the light passing through the high-density pattern 241 , so that the luminance of the low-brightness light can be roughly maintained.

As a result, as shown in the inner lens luminance distribution A2 of FIG. 10 , a surface emitting pattern of approximately uniform luminance over the entire region in which the high-density pattern 241 is formed and the region in which the low-density pattern 242 is formed. can form.

Hereinafter, an inner lens according to a fifth embodiment of the present invention will be described. For convenience of explanation, parts similar to the inner lens according to the first, second, and third embodiments use the same reference numerals, and descriptions of parts common to the inner lens according to the first, second and third embodiments will be omitted. .

11 is an exploded perspective view illustrating an inner lens according to a fifth embodiment of the present invention.

11 , the inner lens 25 according to the fifth embodiment of the present invention includes a first diffusion lens 25a and a second diffusion lens 25b.

The first diffusion lens 25a forms an incident surface 212 of the inner lens 25 , and the second diffusion lens 25b forms an exit surface 211 of the inner lens 25 .

The first diffusion lens 25a has a sub-emission surface 251 formed on the opposite surface of the incident surface 212 through which light passing through the first diffusion lens 25a is emitted toward the second diffusion lens 25b. In addition, the second diffusion lens 25b has a sub-incident surface 252 on the opposite surface of the emission surface 211 through which the light passing through the first diffusion lens 25a is incident.

The first diffusion lens 25a and the second diffusion lens 25b are adjacently installed so that the sub exit surface 251 and the sub incidence surface 252 face each other, or the sub exit surface 251 and the sub incidence surface 252 are It can be installed in contact with

11 , a first light diffusion pattern 256 is formed on the first diffusion lens 25a , and a second light diffusion pattern 257 is formed on the second diffusion lens 25b .

The first light diffusion pattern 256 includes a free pattern in which at least some of the plurality of first fine dots 254 are distributed in an irregular pattern, or at least a portion of the plurality of first fine dots 254 is constant. It may include a regular pattern that is arranged according to a rule.

In addition, the second light diffusion pattern 257 also includes a free pattern in which at least some of the plurality of second fine dots 255 are distributed in an irregular pattern, or at least some of the plurality of second fine dots 255 . may include a regular pattern arranged according to a certain rule.

Alternatively, any one of the first light diffusion pattern 256 and the second light diffusion pattern 257 may include a free pattern and the other may include a regular pattern.

The first diffusion lens 25a and the second diffusion lens 25b may correspond to the inner lens 21 according to the first embodiment of the present invention, respectively. Accordingly, the plurality of first fine dots 254 may be formed of engraved hemispheres 215a (refer to FIG. 5 ) and/or engraved polyhedrons recessed inside the first diffusion lens 25a and/or a plurality of The second fine dots 255 may be formed of engraved hemispheres 215a (refer to FIG. 5 ) and/or engraved polyhedrons that are recessed inside the second diffusion lens 25b.

The plurality of first fine dots 254 may be formed on at least one of the incident surface 212 and the sub-exit surface 251 of the first diffusion lens 25a, and the plurality of second fine dots 255 are 2 It may be formed on at least one of the sub-incident surface 252 and the exit surface 211 of the diffusion lens 25b.

On the other hand, the first diffusion lens 25a or the second diffusion lens 25b is not only the inner lens 21 according to the first embodiment of the present invention, but also the second embodiment or the third embodiment of the present invention described above. It may correspond to the inner lenses 22 and 23 according to the embodiment.

The fine dots 215 of the inner lenses 22 and 23 according to the second or third embodiment have already been described in detail, and detailed description thereof will be omitted to avoid overlapping description.

In the inner lens 25 according to the fifth embodiment of the present invention, a first diffusion lens 25a or a second diffusion lens 25b each having a light diffusion pattern of a free pattern and/or a fixed pattern is stacked along an optical path. It is possible to further improve the luminance uniformity of the surface emission pattern finally formed on the emission surface 211 of the second diffusion lens 25b by disposing it.

Hereinafter, an inner lens according to a sixth embodiment of the present invention will be described. For convenience of description, parts similar to the inner lens according to the fourth and fifth embodiments are given the same reference numerals, and the parts common to the inner lens according to the fourth and fifth embodiments will be omitted.

12 is an exploded perspective view illustrating an inner lens according to a sixth embodiment of the present invention.

12, the inner lens 26 according to the sixth embodiment of the present invention also has a first diffusion lens 26a and a second diffusion lens 26 similarly to the inner lens 25 according to the fifth embodiment described above. a lens 26b.

12 , a first light diffusion pattern 266 is formed on the first diffusion lens 26a, and a second light diffusion pattern 267 is formed on the second diffusion lens 26b.

Similar to the inner lens 25 according to the above-described fifth embodiment, the second light diffusion pattern 267 is a light diffusion pattern in which a plurality of second fine dots 265 are distributed in an irregular and/or regular pattern.

However, the first light diffusion pattern 266 according to the present exemplary embodiment includes a high-density pattern 266a in which some 264a of the plurality of first fine dots 264a and 264b are disposed adjacent to each other, and a high-density pattern 266a. ) includes a low-density pattern 266b in which other portions 264b of the plurality of first fine dots 264a and 264b are disposed around the periphery.

12 , the high-density patterns 266a are continuously disposed at regular intervals, and the low-density patterns 266b are disposed between the consecutive high-density patterns 266a.

The first diffusion lens 26a may correspond to the inner lens 24 according to the fourth embodiment of the present invention. Accordingly, the plurality of fine dots 243 and 244 may be formed on the incident surface 212 (refer to FIG. 9 ) and the exit surface 211 of the inner lens 24 .

In addition, the arrangement relationship between the plurality of point light sources 11, 12, and 13 and the high-density pattern 266a (refer to FIG. 9) and the resulting uniformity of the luminance distribution (refer to FIG. 10) are described in the fourth embodiment of the present invention. Since it has been described in detail in the description of the inner lens 24, a detailed description thereof will be omitted in order to avoid overlapping description.

The inner lens 26 according to the sixth embodiment of the present invention includes a first diffusion lens 26a having a first light diffusion pattern 266 formed on the incident surface 212 side, and is provided on the exit surface 211 side. Since the second diffusion lens 26b on which the second optical pattern 267 is formed is provided, a plurality of point light sources 11 having the first diffusion lens 26a go straight through the high-density pattern 266a and the low-density pattern 266b. , 12, 13 (refer to FIG. 9) into a surface emitting pattern having an approximately uniform luminance, the second diffusion lens 26b forms a free pattern 267 and/or a fixed pattern (not shown). It can be converted into a surface light emitting pattern with improved luminance uniformity and emitted through the emitting surface 211 .

Those of ordinary skill in the art to which the present invention pertains will understand that the present invention may be embodied in other specific forms without changing the technical spirit or essential features thereof. Therefore, it should be understood that the embodiments described above are illustrative in all respects and not restrictive. The scope of the present invention is indicated by the following claims rather than the above detailed description, and all changes or modifications derived from the meaning and scope of the claims and their equivalent concepts should be interpreted as being included in the scope of the present invention. do.

1, 2: Vehicle lamp 10, 11, 12, 13: Light source
20, 21, 22, 23, 24, 25, 26: inner lens
25a, 26b: first diffusing lens 25b, 26b: second diffusing lens
30: outer lens 40: reflector
211: exit surface 212: incident surface
215, 243, 244, 254, 255, 264a, 264b, 265: fine dots
215a: engraved hemisphere 215b: embossed hemisphere
241, 266a: high-density pattern 242, 266b: low-density pattern
251, 261: sub exit surface 252, 262: sub incidence surface
256, 266: first light diffusion pattern 257, 267: second light diffusion pattern
A1: Light source luminance distribution A2: Inner lens luminance distribution

Claims (14)

delete delete delete delete delete delete delete light source;
an outer lens protecting the light source from the outside; and
Including an inner lens provided between the light source and the outer lens,
The inner lens,
a first diffusion lens having an incident surface and a sub-emission surface;
a second diffusion lens having an exit surface and a sub-incident surface facing the sub-emitting surface; and
a first light diffusion pattern formed on at least one of the incident surface and the sub-emission surface, and a second light diffusion pattern formed on at least one of the emission surface and the sub-incident surface of the second diffusion lens; It includes a light diffusion pattern so that the light passing through the lens is emitted with a uniform luminance from the front surface of the emitting surface,
The first light diffusion pattern,
high-density patterns placed continuously; and
It includes a low-density pattern disposed between the successive high-density patterns,
The density of the second light diffusion pattern is formed smaller than the density of the high-density pattern,
The light source is
A surface-emitting vehicle lamp comprising a plurality of point light sources corresponding to the successive high-density patterns one-to-one. 9. The method of claim 8,
The first light diffusion pattern consists of a plurality of first fine dots that are recessed toward the inside of the first light diffusion lens or protrude toward the outside of the first light diffusion lens,
The second light diffusion pattern is formed of a plurality of second fine dots that are formed to be recessed toward the inside of the second light diffusion lens or formed to protrude toward the outside of the second light diffusion lens, a surface light emitting vehicle lamp. 10. The method of claim 9,
The high-density pattern is formed by disposing some of the plurality of first fine dots adjacent to each other,
The low-density pattern is formed so that another portion of the plurality of first fine dots is gradually lowered in density in a direction away from the high-density pattern. 11. The method of claim 10,
The second light diffusion pattern,
At least a portion of the plurality of second fine dots includes a free pattern distributed in an atypical pattern, a surface light emitting vehicle lamp. 11. The method of claim 10,
The light source is a point light source,
The point light source is arranged so that the light emitted from the point light source is concentrated in the high-density pattern, a surface-emitting vehicle lamp. delete 10. The method of claim 9,
Each of the first light diffusion pattern and the second light diffusion pattern includes a free pattern in which at least a portion of the plurality of first fine dots and at least a portion of the plurality of second fine dots are distributed in an irregular pattern , surface-emitting vehicle lamps.

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