KR20230047777A - Lighting apparatus for mobility - Google Patents

Abstract

According to the present invention, when a road surface is wet, only p-polarized light is filtered and irradiated to the road surface, and s-polarized light reflected by water is not projected on the road surface, thereby minimizing light reflection by water. As a result, disclosed is a lighting device in mobility, which prevents dazzling opposing driver, ensures stability between mobility, and improves lighting peeling by emitting light of a uniform waveform.

Description

Lighting device of mobility {LIGHTING APPARATUS FOR MOBILITY}

The present invention relates to a lighting device for mobility that prevents glare caused by light irradiated on a road surface.

In general, mobility is provided with a lighting device for the purpose of enabling a clear view of objects in the driving direction during night driving and for notifying other vehicles or other road users of the driving state of the mobility. A lamp, also called a headlight, is a lighting lamp that illuminates the path ahead of mobility.

These lamps are classified into headlamps, fog lights, turn indicators, brake lights, and reversing lights, and each direction of irradiating light to the road surface is set differently. I'll check out the high beams.

On the other hand, when the light irradiated from the headlamp is incident on the road surface, Lambertian reflection is generated according to the characteristics of the rough surface, generating reflected light of similar intensity in all directions. A part of this reflected light is transmitted to the driver as well as the other driver, so that the road surface can be identified.

However, when the road surface is wet, most of the light is reflected as the light emitted from the headlamp is incident on the smooth water surface. This causes glare to nearby drivers, and there is a problem in that an accident risk occurs due to visual limitations caused by the glare.

The matters described as the background art above are only for improving understanding of the background of the present invention, and should not be taken as an admission that they correspond to prior art already known to those skilled in the art.

KR 10-2013-0048540 A (2013.05.10.)

The present invention has been proposed to solve this problem, and provides a mobility lighting device that prevents glare to the other driver by reflecting light irradiated on the road surface by water accumulated on the road surface when the road surface is wet. There is a purpose.

A lighting device for mobility according to the present invention for achieving the above object includes a light source for radiating light; a condensing lens disposed so that the light irradiated from the light source is incident and condensed the incident light with a focal point; Arranged so that the light passing through the condensing lens is incident, and any one polarized light of the incident light is transmitted and condensed to the first focus in the irradiation direction, and the polarized light of the other wavelength direction is reflected and condensed to the second focus. polarization filter; a wave plate disposed to receive polarized light that has been reflected and moved through the polarization filter and converts the incident polarized light into polarized light in the same wavelength direction as the polarized light passing through the polarization filter; and a reflective mirror disposed to receive polarized light transmitted through the wave plate to be incident and to reflect the incident polarized light to change a moving direction so that the reflected light is condensed to a second focal point with respect to the irradiation direction.

A condensing lens is formed of an incident part for receiving light irradiated from a light source and emitting the incident light, a reflecting part for total reflection of the light emitted from the incident part, and an output part for condensing light moving through the incident part and the reflecting part. to be characterized

The incident part is characterized in that it consists of a first incident surface that refracts the incident light and moves it to the emission part with straightness, and a second incident surface that transmits the incident light and moves it to the reflection part.

The second incident surface is characterized in that it is formed in a circular plane shape with the light source as a focal point.

The reflector is characterized in that it is formed such that a horizontal cross section forms a parabolic shape with the light source as a focus from the incident part to the output part.

The reflector is characterized in that the vertical section is formed to form a partial shape of an ellipse with the light source as one focal point.

The emitting unit is characterized in that the vertical section is formed to protrude curvedly toward the center.

The polarization filter is characterized in that it is configured to transmit p-polarized light and reflect s-polarized light among light emitted from a light source.

The wave plate is configured to convert s-polarized light reflected through the polarization filter into p-polarized light.

It is characterized in that it is further included; a light irradiation means disposed to receive polarized light transmitted through the polarization filter or reflected through the reflective mirror, and to irradiate each incident polarized light to the outside.

The light irradiation unit is disposed so that polarized light transmitted through the polarization filter is incident, and the incident polarized light is irradiated to the outside, and the polarized light moved through the wave plate and the reflective mirror is disposed to be incident, It is characterized in that it consists of a second lens that allows the incident polarized light to be irradiated to the outside.

A light source, a condensing lens, a polarizing filter, and a first lens are arranged in a direction of irradiation, a wave plate and a reflection mirror are arranged in a line with a polarizing filter in a direction crossing an optical axis of light irradiated from a light source, and a second lens It is characterized in that it is arranged so that the polarized light reflected from the reflection mirror and moved is incident.

A first shield disposed between the polarization filter and the first lens at the first focus of the polarized light passing through the polarization filter; further included, a cut-off line is formed in the polarized light irradiated through the first lens by the first shield. characterized by

A second shield disposed at the second focus of the polarized light reflected by the reflective mirror or between the reflective mirror and the second lens; further included, the polarized light irradiated through the second lens by the second shield Characterized in that a cut-off line is formed.

The light irradiation unit is characterized in that it consists of a first reflector that converts the movement path of the polarized light transmitted through the polarization filter and a second reflector that changes the movement path of the polarized light that has moved through the wave plate and the reflection mirror.

A light source, a condensing lens, and a polarizing filter are arranged diagonally on a straight line, a wave plate and a reflection mirror are arranged in a direction in which the polarized light reflected from the polarizing filter is incident, and the light irradiation means is arranged in such a way that the polarized light projected through the polarizing filter is arranged. and the polarized light reflected by the reflection mirror is disposed so that the first reflector reflects the polarized light transmitted through the polarization filter to move in the irradiation direction, and the second reflector reflects the polarized light moved through the reflection mirror and irradiates the light. It is characterized in that it moves in the direction.

It is characterized in that a third shield disposed at the first focus of the polarized light passing through the polarization filter is formed on the first reflector or the second reflector in the light irradiation unit.

It is characterized in that the reflection mirror is formed with a fourth shield disposed at the second focus of the polarized light reflected by the reflection mirror.

In the mobility lighting device having the structure described above, when the road surface is wet, only the p-polarized light is filtered and irradiated to the road surface, and the s-polarized light reflected on the water is not projected onto the road surface. light reflection is minimized. As a result, glare of the other driver is prevented, stability between mobilities is secured, and lighting feeling is improved as light of a uniform waveform is irradiated.

1 is a view showing a lighting device for mobility according to a first embodiment of the present invention.
2 is a view showing a condensing lens according to the present invention.
3 is a view showing the condensing lens shown in FIG. 2;
4 is a horizontal cross-sectional view taken along AA' of the condensing lens shown in FIG. 3;
5 is a vertical cross-sectional view along BB' of the condensing lens shown in FIG. 3;
6 is a view for explaining a lighting device of the mobility shown in FIG. 1;
7 is a view showing a lighting device for mobility according to a second embodiment of the present invention.
8 is a view for explaining a lighting device of the mobility shown in FIG. 7;

Hereinafter, a lighting device for mobility according to a preferred embodiment of the present invention will be described with reference to the accompanying drawings.

1 is a view showing a lighting device for mobility according to a first embodiment of the present invention, FIG. 2 is a view showing a condensing lens according to the present invention, FIG. 3 is a view showing the condensing lens shown in FIG. 2, 4 is a horizontal cross-sectional view of the condensing lens shown in FIG. 2 taken along line A-A', FIG. 5 is a vertical cross-sectional view taken along line BB' of the condensing lens shown in FIG. 2, and FIG. 6 is shown in FIG. It is a diagram for explaining a lighting device for mobility, FIG. 7 is a diagram showing a lighting device for mobility according to a second embodiment of the present invention, and FIG. 8 is a diagram for explaining the lighting device for mobility shown in FIG. 7 .

As shown in FIGS. 1 to 5, the lighting device for mobility according to the present invention includes a light source 100 for irradiating light; a condensing lens 200 arranged so that the light irradiated from the light source 100 is incident, and condensing the incident light with a focal point; Arranged so that the light passing through the condensing lens 200 is incident, and any one polarized light of the incident light is transmitted and condensed to the first focus point F1 in the irradiation direction, and polarized light in other wavelength directions is reflected and removed. a polarization filter 300 configured to focus on 2 focal points F2; A wave plate 400 arranged so that the polarized light reflected and moved through the polarization filter 300 is incident, and the incident polarized light is converted into polarized light of the same wavelength direction as the polarized light passing through the polarization filter 300 ; and a reflection in which the polarized light transmitted through the wave plate 400 is incident and the incident polarized light is reflected to change the direction of movement so that the reflected light is focused on the second focus point F2 with respect to the irradiation direction. A mirror 500; includes.

As such, in the present invention, light emitted from one light source 100 is filtered into polarized light in different wavelength directions by the polarization filter 300, and one of the filtered polarized light is moved in the irradiation direction, The polarized light of the other wavelength direction is converted in the wavelength plate 400 and moved in the irradiation direction through the reflection mirror 500. Due to this, the light irradiated from the light source 100 is finally emitted as polarized light in the same wavelength direction when emitted.

Here, the light source 100 may be composed of LEDs.

The light irradiated from the light source 100 is incident on the condensing lens 200, and the light is focused and condensed through the condensing lens 200, so that the light can be accurately irradiated to the location on the road surface where the light is to be irradiated. there is. In addition, the light irradiated from the light source 100 is condensed by the condensing lens 200, which is advantageous in forming a lighting pattern.

In this way, light passing through the condensing lens 200 is incident on the polarization filter 300 . Here, the polarization filter 300 is configured to transmit or reflect light according to the polarization direction, so that polarized light in a specific wavelength direction is transmitted, and polarized light in other wavelength directions is reflected and moved to the wave plate 400. . In this polarization filter 300, TAC (Tri-acetate cellulose) film serving as a protective body for the polarizing element is centered on a PVA (Poly Vinyl Alcoho) film (polarizing element) to which a dichroic material is dyed, on both sides of the polarizing element. It may be made of a three-layer structure of TAC-PVA-TAC, which is a bonded form. Here, surface coating treatment having characteristics such as scattering, hardness enhancement, and reflection may be added to the surface of the TAC film according to required characteristics.

Accordingly, the polarized light of a specific wavelength direction passing through the polarization filter 300 is irradiated to the outside while being condensed at the first focal point F1 as it passes through the condensing lens 200, and the polarized light of other wavelength directions is reflected and It is moved to the wave plate 400.

The wave plate 400 is an optical element that changes the polarization state of light, and may be formed so that a light difference is formed so that the wavelength of light is changed. Due to this, the polarized light reflected by the polarization filter 300 and moving is converted into polarized light in the same wavelength direction as the polarized light passing through the polarization filter 300 when passing through the wave plate 400 .

In this way, the polarized light transmitted through the wave plate 400 and changed direction is incident on the reflective mirror 500, and the reflective mirror 500 reflects the incident polarized light to change the moving direction, so that the reflected polarized light is The light is focused on the second focal point F2 in the irradiation direction. Here, the irradiation direction is a position where light is to be irradiated on the road surface, and the polarized light reflected through the reflection mirror 500 moves in the irradiation direction, which is the same path as the polarized light transmitted through the polarization filter 300, and the second focus While being condensed in (F2), it can be irradiated to the outside to form a lighting pattern.

Accordingly, when light is irradiated on a wet road surface, only polarized light of a specific wavelength direction that is not reflected by water is projected onto the road surface, thereby minimizing light reflection by water, and lighting feeling as polarized light of the same wavelength direction is irradiated. this improves

Describing the present invention described above in detail, as shown in FIGS. 2 to 5, the condensing lens 200 includes an incident part 210 for receiving light irradiated from the light source 100 and emitting the incident light. , The reflector 220 for total reflection of the light emitted from the incident part 210 and the emitter 230 for condensing the light moving through the incident part 210 and the reflector 220 may be formed.

In this way, the condensing lens 200 is composed of an incident part 210, a reflection part 220, and an emission part 230, and the light incident through the incident part 210 is emitted from the inside, and the reflection part 220 and Light that is moved to the emitting unit 230 and moved to the reflecting unit 220 is totally reflected and moves to the emitting unit 230 with straightness.

In detail, as shown in FIGS. 3 and 4, the incident part 210 has a first incident surface 211 that refracts incident light so that it moves to the emission part 230 with straightness, and the incident light It consists of a second incident surface 212 that transmits and moves to the reflecting part 220 .

That is, the incident part 210 is composed of a first incident surface 211 disposed on the optical axis of light irradiated from the light source 100 and a second incident surface 212 extending from the first incident surface 211 to the edge. do.

Here, the first incident surface 211 is formed in an aspheric shape to refract incident light so that it moves toward the emission unit 230 with straightness. As a result, as can be seen in FIG. 2 , light incident on the first incident surface 211 of the incident part 210 is refracted by the aspheric shape of the first incident surface 211 and travels straight.

In addition, the second incident surface 212 is curved and extended in a circular shape, and when light irradiated from the light source 100 is incident, the light is transmitted and moved to the reflector 220 . That is, as shown in FIG. 4 , the second incident surface 212 may be formed in a circular shape with the light source 100 as a focal point. As such, the second incident surface 212 is perpendicular to the movement direction of the light emitted from the light source 100 as it forms a circular plane shape with the light source as the focal point, so that the movement direction of the light is not affected. Due to this, the light incident on the second incident surface 212 of the incident part 210 does not generate total internal reflection due to the shape of the second incident surface 212 and travels straight to the reflector 220 .

The reflector 220 is formed such that a horizontal cross section forms a parabolic shape from the incident part 210 to the emitting part 230 with the light source as a focal point.

In this way, as the horizontal section of the reflector 220 extends in a parabola with the light source as the focus, the light emitted through the second incident surface 212 of the incident part 210 is incident upon the reflector 220. It can be moved toward the emission unit 230 with .

In addition, the reflector 220 is formed such that a vertical cross section forms a part of an elliptical shape with the light source 100 as one focus.

That is, in the case of a vertical section, the reflector 200 forms a partial shape of an ellipse having the light source 100 as a focal point in an ellipse having the light source 100 as one focal point and the other focal point as the first focal point. As a result, when the light emitted through the second incident surface 212 of the incident part 210 is incident on the reflector 220, it can be moved toward another focal point.

For this reason, when the light emitted from the light source is reflected by the reflector 220, the light may be emitted in a linear pattern.

The emitting part 230 is formed so that its vertical cross section protrudes curvedly toward the center. As can be seen in FIGS. 4 and 5 , the emitting part 230 is formed in an aspheric shape, so that the light moving through the incident part 210 and the reflecting part 220 is aligned and emitted with straightness.

As such, in the condensing lens 200 according to an embodiment of the present invention, when the light irradiated from the light source 100 is incident to the incident part 210, some light is refracted through the first incident surface 211 to emit part ( 230), the remaining light transmits and refracts through the second incident surface 212 and moves to the reflector 220. Here, light emitted through the second incident surface 212 is totally reflected through the reflector 220 and moved toward the emitter 230 . In this way, the light moving toward the emitting unit 230 in a straight line is aligned when passing through the emitting unit 230 and is irradiated so as to approximate parallel light extending in a line.

Due to this, the present invention is easy to form a cut-off line of a light pattern to be described below, can form an accurate light pattern, and can secure the amount of light.

Meanwhile, the polarization filter 300 is configured to transmit p-polarized light and reflect s-polarized light among light emitted from the light source 100 .

In addition, the wave plate 400 is configured to convert s-polarized light reflected through the polarization filter 300 into p-polarized light.

That is, the light emitted from the light source 100 is filtered into different polarized light by the polarization filter 300 and divided into p-polarized light and s-polarized light.

The polarization filter 300 transmits p-polarized light among the light emitted from the light source 100 to be irradiated to the outside, and reflects s-polarized light so that it moves to the wave plate 400, so that the wave plate 400 s-polarized light is converted into p-polarized light by

Here, the wave plate 400 is configured to convert s-polarized light into p-polarized light, so that the s-polarized light is converted into p-polarized light to obtain p-polarized light having the same wavelength as the p-polarized light filtered by the polarization filter 300. emitted with light

As such, the light emitted from the light source 100 is filtered into p-polarized light and s-polarized light by the polarization filter 300, the p-polarized light passes through the polarization filter 300 and is irradiated to the outside, and the s-polarized light As the wavelength direction is changed through the wave plate 400, only the p-polarized light is emitted to the outside, thereby minimizing light reflection by water.

This is based on the Brewster Angle (polarization angle), and uses the property that reflection occurs when s-polarized light is incident on water and transmits without reflection when p-polarized light is incident on water.

As such, the light generated from the light source 100 is filtered by the polarization filter 300, so that p-polarized light is emitted to the outside, and the remaining s-polarized light is converted into p-polarized light by the wave plate 400 and is released to the outside.

For this reason, in the present invention, when the low beam is irradiated, the light generated from the light source 100 is filtered by the polarization filter 300 and the wave plate 400 and only the p-polarized light is projected onto the road surface, so that even if the road surface is wet, the p-polarized light It is not reflected and transmitted through the water, so light reflection by the water does not occur, so glare to surrounding mobility can be minimized.

On the other hand, in the present invention, the light irradiation unit (600) is disposed so that the polarized light transmitted through the polarization filter 300 or the polarized light reflected through the reflective mirror 500 is incident, and irradiates each incident polarized light to the outside. ); is further included.

The light irradiation unit 600 receives light moving through the polarization filter 300, the wave plate 400, and the reflection mirror 500, and irradiates the incident light in the irradiation direction so that it is projected onto the road surface. Here, the irradiation direction is a direction in which light is finally emitted.

The light irradiation unit 600 according to the present invention may be applied in various embodiments according to the arrangement of the light source 100, the polarization filter 300, the wave plate 400, and the reflection mirror 500.

As a first embodiment, as shown in FIGS. 1 and 6, the light irradiation means 600 is disposed so that polarized light transmitted through the polarization filter 300 is incident, and the incident polarized light is irradiated to the outside. It consists of a first lens 610 that is arranged to receive polarized light moved through the wave plate 400 and the reflection mirror 500 and a second lens 620 that irradiates the incident polarized light to the outside. It can be.

In this way, the light irradiation unit 600 may be composed of a first lens 610 and a second lens 620, and the first lens 610 and the second lens 620 are aspheric lenses that pass through each lens. It may be configured so that the polarized light is aligned and emitted. The first lens 610 and the second lens 620 can be changed so that light is projected in a designed irradiation direction through a change in shape.

That is, among the light emitted from the light source 100, the p-polarized light filtered through the polarization filter 300 is incident on the first lens 610, and the p-polarized light is projected and emitted in the irradiation direction.

In the second lens 620, among the light irradiated from the light source 100, filtered s-polarized light as reflected by the polarization filter 300 is converted into p-polarized light through the wave plate 400, and then the reflection mirror 500 The p-polarized light reflected by is incident. In this way, the p-polarized light converted through the wave plate 400 passes through the second lens 620 and is emitted in the irradiation direction.

Accordingly, the light source 100, the condensing lens 200, the polarization filter 300, and the first lens 610 are arranged in a row in the irradiation direction, and the wave plate 400 and the reflection mirror 500 are arranged in the light source 100. ) is arranged in line with the polarization filter 300 in a direction crossing the optical axis of the irradiated light, and the second lens 620 is arranged so that the polarized light reflected from the reflection mirror 500 and moved is incident.

As such, as the light source 100, the condensing lens 200, and the polarization filter 300 are arranged in a row in the irradiation direction, the first lens 610 is connected to the light source 100, the condensing lens 200, and the polarization filter 300. ), p-polarized light among the light irradiated from the light source 100 passes through the first lens 610 and is irradiated to the outside.

In addition, the wave plate 400 and the reflection mirror 500 are disposed in alignment with the polarization filter 300 in a direction crossing the optical axis of the light irradiated from the light source 100, and the second lens 620 is the reflection mirror ( 500), the p-polarized light passes through the second lens 620 and is irradiated to the outside.

In this way, the light source 100, the condensing lens 200, the polarization filter 300, and the first lens 610 are arranged on the optical axis of the light emitted from the light source 100, and the wave plate 400 and the reflection The mirror 500 has a structure in which the polarization filter 300 is disposed perpendicular to the optical axis and the second lens 620 is disposed in the moving direction of the light reflected from the reflection mirror 500, thereby simplifying the arrangement structure of the optical system. This makes it easy to form a light pattern in the direction of irradiation.

Meanwhile, the present invention further includes a first shield 710 disposed between the polarization filter 300 and the first lens 610 at the first focal point F1 of the polarized light passing through the polarization filter 300. . For this reason, among the light irradiated from the light source 100, the p-polarized light transmitted through the polarization filter 300 has a cut-off line formed by the first shield 710 and is emitted to the outside through the first lens 610.

In particular, the light irradiated from the light source 100 is condensed at the first focal point F1 through the condensing lens 200, and the first shield 710 is disposed at the first focal point F1 so that the first shield 710 A cut-off line according to the shape of is formed accurately.

In addition, a second shield 720 disposed at the second focal point F2 of the polarized light reflected by the reflection mirror 500 or between the reflection mirror 500 and the second lens 620; is more included. For this reason, among the light irradiated from the light source 100, the p-polarized light that is reflected by the polarization filter 300 and converted as it passes through the wave plate 400 is reflected by the reflection mirror 500, and the second shield 720 ) by which the cutoff line is formed. The second shield 720 may be integrally formed with the reflection mirror 500 or disposed between the reflection mirror 500 and the second lens 620 according to a design according to the position of the second focus point F2. In the present invention, the structure of the reflection mirror 500 and the second shield 720 is simplified by forming the second shield 720 on the reflection mirror 500 .

In particular, the light irradiated from the light source 100 has a focus through the condensing lens 200, passes through the wave plate 400, and then is reflected by the reflection mirror 500 and condensed at the second focus point F2. The second shield 720 is disposed at the second focal point F2 so that a cut-off line according to the shape of the second shield 720 is accurately formed.

In this way, the light emitted from the light source 100 is filtered and converted into p-polarized light, respectively, and a cut-off line is formed by the first shield 710 and the second shield 720 for each p-polarized light. Here, the cut-off lines according to the first shield 710 and the second shield 720 are mutually matched so that beam patterns projected on the road surface can be matched.

For this reason, in the present invention according to the first embodiment, as shown in FIG. 6, the light irradiated from the light source 100 is moved with a focus by the condensing lens 200 but transmitted through the polarization filter 300. The polarized light is projected through the first lens 610 after a cut-off line is formed in the first shield 710 and projected onto the road surface.

In addition, among the light irradiated from the light source 100, the s-polarized light reflected by the polarization filter 300 is converted into p-polarized light as it passes through the wave plate 400, and the converted p-polarized light is passed through the reflection mirror 500. It is reflected through and moved toward the second lens 620, but a cut-off line is formed in the second shield 720 and projected onto the road surface.

As a second embodiment, as shown in FIGS. 7 and 8, the light irradiation unit 600 includes a first reflector 630 for converting a movement path of polarized light transmitted through the polarization filter 300, and a wave plate ( 400) and a second reflector 640 that converts the movement path of the polarized light moved through the reflection mirror 500.

As such, the light irradiation means 600 may be composed of a first reflector 630 and a second reflector 640, and the first reflector 630 and the second reflector 640 are formed to be curved in a parabolic shape and incident The reflected light is reflected and moved in the irradiation direction.

That is, among the light emitted from the light source 100 , p-polarized light filtered through the polarization filter 300 is incident on the first reflector 630 , and the p-polarized light is reflected and emitted in the irradiation direction.

In the second reflector 640, among the light irradiated from the light source 100, filtered s-polarized light as reflected by the polarization filter 300 is converted into p-polarized light through the wave plate 400, and then the reflection mirror 500 The p-polarized light reflected by is incident. In this way, the p-polarized light converted through the wave plate 400 is reflected by the second reflector 640 and emitted in the irradiation direction.

Accordingly, the light source 100, the condensing lens 200, and the polarization filter 300 are disposed obliquely on a straight line along the optical axis of the light irradiated from the light source 100, and the wave plate 400 and the reflection mirror 500 ) is arranged in a direction in which the polarized light reflected from the polarization filter 300 is incident. The light irradiation unit 600 is disposed so that the polarized light projected through the polarization filter 300 and the polarized light reflected by the reflection mirror 500 are incident, and the first reflector 630 transmits the polarized light through the polarization filter 300. is reflected and moved in the irradiation direction, and the second reflector 640 reflects the polarized light moved through the reflection mirror 500 to move in the irradiation direction.

As such, the light source 100, the condensing lens 200, and the polarization filter 300 are arranged in an oblique line, and the first reflector 630 is arranged so that light transmitted through the polarization filter 300 is incident, and the light source ( Among the lights irradiated in 100), as the p-polarized light is reflected by the first reflector 630 and its direction is changed, it may move in the irradiation direction.

In addition, the wave plate 400 and the reflection mirror 500 are arranged in a direction in which the polarized light reflected from the polarization filter 300 is incident, and the second reflector 640 moves through the reflection mirror 500. Arranged so that the polarized light is incident, the p-polarized light converted through the wave plate 400 may be reflected by the second reflector 640 and moved in the irradiation direction.

In this way, the light source 100, the condensing lens 200, and the polarization filter 300 are arranged obliquely, and the wave plate 400 and the reflection mirror 500 are directed in the direction in which the polarized light reflected from the polarization filter 300 is incident. By being arranged in a row, the light transmitted through the polarization filter 300 is reflected by the first reflector 630 and moved in the irradiation direction, and the light passing through the wave plate 400 and reflected by the reflection mirror 500 is It is re-reflected by the second reflector 640 and has a structure that moves in the irradiation direction. As such, the light irradiated from the light source 100 is filtered by the polarization filter 300 and moved in different directions, and then converted into the same p-polarized light and incident on the light irradiation unit 600, so each p-polarized light Since the incident position is the same, the first reflector 630 and the second reflector 640 can be integrated. Accordingly, the size of the entire optical system is reduced, and light can be irradiated in the irradiation direction.

In addition, in the light irradiation unit 600, the first reflector 630 or the second reflector 640 has a third shield 730 disposed at the first focus point F1 of the polarized light transmitted through the polarization filter 300. is formed

For this reason, among the light irradiated from the light source 100, the p-polarized light transmitted through the polarization filter 300 has a cut-off line formed by the third shield 730 and is incident on the first reflector 630, thereby forming a cut-off line. The movement direction of the formed p-polarized light is changed in the first reflector 630 and emitted to the outside. In particular, the light irradiated from the light source 100 is condensed to the first focus point F1 through the condensing lens 200, and the third shield 730 extending from the first reflector 630 is the first focus point F1. A cut-off line according to the shape of the third shield 730 is accurately formed.

A fourth shield 740 disposed at the second focus point F2 of the polarized light reflected by the reflection mirror 500 is formed on the reflection mirror 500 .

For this reason, of the light irradiated from the light source 100, the p-polarized light that is reflected by the polarization filter 300 and converted as it passes through the wave plate 400 is reflected by the reflection mirror 500 and is moved by the fourth shield 740. A cut-off line is formed by ), and after being reflected through the second reflector 640, it is emitted to the outside. The fourth shield 740 may be integrally formed with the reflection mirror 500 or disposed between the reflection mirror 500 and the second lens 620 according to a design according to the location of the second focus point F2.

In particular, the light irradiated from the light source 100 has a focus through the condensing lens 200, passes through the wave plate 400, and then is reflected by the reflection mirror 500 and condensed at the second focus point F2. The fourth shield 740 is disposed at the second focal point F2 so that a cut-off line according to the shape of the fourth shield 740 is accurately formed. In the present invention, the structure of the reflection mirror 500 and the fourth shield 740 can be simplified by forming the fourth shield 740 on the reflection mirror 500 .

In this way, the light emitted from the light source 100 is filtered and converted into p-polarized light, respectively, and a cut-off line is formed by the third shield 730 and the fourth shield 740 for each p-polarized light. Here, the cut-off lines according to the third shield 730 and the fourth shield 740 are mutually matched so that beam patterns projected on the road surface can be matched.

Due to this, in the present invention according to the second embodiment, as shown in FIG. 8, the light irradiated from the light source 100 is moved with a focus by the condensing lens 200, but the light transmitted through the polarization filter 300 is p After the cut-off line is formed in the third shield 730, the polarized light is reflected by the first reflector 630 and projected onto the road surface.

In addition, among the light irradiated from the light source 100, the s-polarized light reflected by the polarization filter 300 is converted into p-polarized light as it passes through the wave plate 400, and the converted p-polarized light passes through the reflection mirror 500. It is reflected through and moved toward the second reflector 640, but a cut-off line is formed in the fourth shield 740 and projected onto the road surface.

In the mobility lighting device having the structure described above, when the road surface is wet, only the p-polarized light is filtered and irradiated to the road surface, and the s-polarized light reflected on the water is not projected onto the road surface. light reflection is minimized. As a result, glare of the other driver is prevented, stability between mobilities is secured, and lighting feeling is improved as light of a uniform waveform is irradiated.

Although the present invention has been shown and described in relation to specific embodiments, it is known in the art that the present invention can be variously improved and changed without departing from the technical spirit of the present invention provided by the claims below. It will be self-evident to those skilled in the art.

100: light source 200: condensing lens
210: entrance part 211: first entrance surface
212: second entrance surface 200: reflector
230: emission unit 300: polarization filter
400: wave plate 500: reflection mirror
600: light irradiation means 610: first lens
620: second lens 630: first reflector
640: second reflector 710: first shield
720: 2nd shield 730: 3rd shield
740: 4th shield F1: 1st focus
F2: 2nd focus

Claims (18)

a light source that irradiates light;
a condensing lens disposed so that the light irradiated from the light source is incident and condensed the incident light with a focal point;
Arranged so that the light passing through the condensing lens is incident, and any one polarized light of the incident light is transmitted and condensed to the first focus in the irradiation direction, and the polarized light of the other wavelength direction is reflected and condensed to the second focus. polarization filter;
a wave plate disposed so that polarized light reflected and moved through the polarization filter is incident, and converts the incident polarized light into polarized light in the same wavelength direction as the polarized light passing through the polarization filter; and
A reflective mirror disposed so that the polarized light transmitted through the wave plate is incident and the incident polarized light is reflected and the moving direction is changed so that the reflected light is focused on a second focal point with respect to the irradiation direction; lighting device. The method of claim 1,
A condensing lens is formed of an incident part for receiving light irradiated from a light source and emitting the incident light, a reflecting part for total reflection of the light emitted from the incident part, and an output part for condensing light moving through the incident part and the reflecting part. A lighting device of mobility that is characterized. The method of claim 2,
The lighting device for mobility, characterized in that the incident part consists of a first incident surface that refracts the incident light so that it moves to the emission part with straightness, and a second incident surface that transmits the incident light and moves it to the reflector. The method of claim 3,
The second incident surface is a lighting device for mobility, characterized in that formed in a circular shape with the light source as a focal point. The method of claim 2,
The lighting device of mobility, characterized in that the reflector is formed so that the horizontal cross section forms a parabolic shape with the light source as the focus from the incident part to the output part. The method of claim 2,
The lighting device of mobility, characterized in that the reflector is formed so that the vertical section forms a partial shape of an ellipse with the light source as one focus. The method of claim 2,
Mobility lighting device, characterized in that the emitting portion is formed so that the vertical cross section protrudes curvedly toward the center. The method of claim 1,
The polarization filter is a lighting device for mobility, characterized in that configured to transmit p-polarized light and reflect s-polarized light among the light emitted from the light source. The method of claim 8,
The wave plate is a lighting device for mobility, characterized in that configured to convert s-polarized light reflected through a polarization filter into p-polarized light. The method of claim 1,
A lighting device for mobility, characterized in that it further comprises; a light irradiation means arranged so that the polarized light transmitted through the polarization filter or the polarized light reflected through the reflective mirror is incident, and irradiates each incident polarized light to the outside. . The method of claim 10,
The light irradiation unit is disposed so that polarized light transmitted through the polarization filter is incident, and the incident polarized light is irradiated to the outside, and the polarized light moved through the wave plate and the reflective mirror is disposed to be incident, Mobility lighting device, characterized in that composed of a second lens that allows the incident polarized light to be irradiated to the outside. The method of claim 11,
The light source, the condensing lens, the polarizing filter, and the first lens are arranged in a direction of irradiation,
The wave plate and the reflective mirror are arranged in line with the polarization filter in a direction crossing the optical axis of the light irradiated from the light source,
The second lens is a lighting device for mobility, characterized in that arranged so that the polarized light reflected from the reflection mirror and moving is incident. The method of claim 12,
A first shield disposed between the polarization filter and the first lens at the first focus of the polarized light passing through the polarization filter; further included, a cut-off line is formed in the polarized light irradiated through the first lens by the first shield. A lighting device for mobility, characterized in that. The method of claim 12,
A second shield disposed at the second focus of the polarized light reflected by the reflective mirror or between the reflective mirror and the second lens; further included, the polarized light irradiated through the second lens by the second shield A lighting device for mobility, characterized in that a cut-off line is formed. The method of claim 10,
The light irradiation unit is composed of a first reflector for converting the movement path of polarized light transmitted through the polarization filter and a second reflector for converting the movement path of polarized light moved through the wave plate and the reflection mirror. lighting device. The method of claim 15
The light source, the condensing lens, and the polarizing filter are arranged diagonally on a straight line,
The wave plate and the reflective mirror are arranged in a direction in which polarized light reflected from the polarization filter is incident,
The light irradiation means is arranged so that the polarized light projected through the polarization filter and the polarized light reflected by the reflective mirror are incident, so that the first reflector reflects the polarized light transmitted through the polarization filter and moves it in the irradiation direction, and the second reflector reflects the polarized light. A lighting device for mobility, characterized in that the polarized light moved through the mirror is reflected and moved in the irradiation direction. The method of claim 15
A lighting device for mobility, characterized in that a third shield disposed at the first focus of the polarized light transmitted through the polarization filter is formed on the first reflector or the second reflector in the light irradiation unit. The method of claim 15
Mobility lighting device, characterized in that the reflection mirror is formed with a fourth shield disposed at the second focus of the polarized light reflected by the reflection mirror.

Images