KR20180070256A - Automotive hologram image producing lamp - Google Patents

Abstract

The present invention relates to a hologram image reproducing lamp for a vehicle, and relates to a hologram image reproducing lamp for a vehicle in which a light exposed to the outside is realized in a hologram image shape. The hologram image reproducing lamp for a vehicle according to an embodiment of the present invention comprises: a light irradiating portion for irradiating light; and a hologram formation portion provided with a plurality of hologram storage mediums recorded with hologram information, and forming a plurality of holograms corresponding to the hologram storage mediums by receiving the irradiated light.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hologram image reproducing lamp,

BACKGROUND OF THE INVENTION Field of the Invention [0001] The present invention relates to a hologram image reproducing lamp for a vehicle, and more particularly, to a hologram image reproducing lamp for a vehicle, in which light externally exposed is realized in the form of a hologram image.

Generally, the vehicle has a lighting function for easily confirming an object located in the vicinity of the vehicle at nighttime driving, and a lamp having a signal function for notifying other vehicle or road users of the running state of the vehicle.

For example, headlights and fog lights are mainly aimed at lighting functions. Direction lights, taillights, taillights and side markers are mainly used for signal functions. In some cases, lighting functions and signal functions .

In recent years, the lamp module has exceeded merely the lighting function and the signal function, so that a specific type of light is emitted to the outside, thereby improving the visibility and enhancing the awareness of the product of a specific maker.

On the other hand, it is not easy to have differentiation from other products through this, as it has been a long-lasting technology to transform the shape of light emitted to the outside.

Therefore, the emergence of an invention for a vehicle lamp that can give a clearer differentiation from other products is required.

Korean Patent Publication No. 10-2010-0114916 (Oct. 26, 2010)

SUMMARY OF THE INVENTION [0006] The present invention provides a hologram image reproducing lamp for a vehicle, which exposes the light to the outside in the form of a hologram image.

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

The hologram image reproducing lamp for a vehicle according to the embodiment of the present invention includes a light irradiating part for irradiating light and a plurality of hologram recording media on which hologram information is recorded, And a hologram forming unit for forming a plurality of corresponding holograms.

The details of other embodiments are included in the detailed description and drawings.

According to the hologram image reproducing lamp of the present invention as described above, the light that is exposed to the outside of the vehicle lamp is realized in the form of a hologram image, thereby improving the visibility and improving the awareness of the product of a specific manufacturer have.

1 and 2 are conceptual diagrams of a hologram image reproducing lamp for a vehicle according to an embodiment of the present invention.
3 and 4 are views showing a hologram formed by a hologram image reproducing lamp for a vehicle according to an embodiment of the present invention.
5 is a block diagram of a hologram image reproducing lamp for a vehicle according to an embodiment of the present invention.
6 is a view illustrating a hologram forming unit according to an embodiment of the present invention.
7 is a cross-sectional view of a hologram plate according to an embodiment of the present invention.
8 to 13 are views showing a plurality of holograms formed by the hologram image reproducing lamp for a vehicle according to the embodiment of the present invention.

BRIEF DESCRIPTION OF THE DRAWINGS The advantages and features of the present invention, and the manner of achieving them, will be apparent from and elucidated with reference to the embodiments described hereinafter in conjunction with the accompanying drawings. The present invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art. To fully disclose the scope of the invention to those skilled in the art, and the invention is only defined by the scope of the claims. Like reference numerals refer to like elements throughout the specification.

Thus, in some embodiments, well known process steps, well-known structures, and well-known techniques are not specifically described to avoid an undue interpretation of the present invention.

The terminology used herein is for the purpose of illustrating embodiments and is not intended to be limiting of the present invention. In the present specification, the singular form includes plural forms unless otherwise specified in the specification. It is to be understood that the terms comprise and / or comprise are used in a generic sense to refer to the presence or addition of one or more other elements, steps, operations and / or elements other than the stated elements, steps, operations and / It is used not to exclude. And "and / or" include each and any combination of one or more of the mentioned items.

Further, the embodiments described herein will be described with reference to cross-sectional views and / or schematic drawings that are ideal illustrations of the present invention. Thus, the shape of the illustrations may be modified by manufacturing techniques and / or tolerances. Accordingly, the embodiments of the present invention are not limited to the specific forms shown, but also include changes in the shapes that are generated according to the manufacturing process. In addition, in the drawings of the present invention, each component may be somewhat enlarged or reduced in view of convenience of explanation. Like reference numerals refer to like elements throughout the specification.

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 and 2 are conceptual diagrams of a hologram image reproducing lamp for a vehicle according to an embodiment of the present invention.

Referring to FIG. 1, a vehicle hologram image reproducing lamp 10 includes a light source 11 and a holographic storage medium 12.

The light source 11 may be one of any light sources that can be used for hologram reproduction, such as a light emitting diode (LED), a laser, and a bulb type light source.

Hologram information is recorded in the hologram storage medium 12. [ The hologram storage medium 12 can record interference fringes generated by interference between a reference beam and an object beam as hologram information. The hologram is generated by the interference of light. In order to realize the hologram, the interference fringe should be recorded in the hologram storage medium 12 by using the reference light and the object light.

The reference light refers to light directly illuminated by the hologram storage medium 12 of any light source, and the object light refers to light reflected by an object among the light by the light source.

Both the reference light and the object light are irradiated onto the hologram storage medium 12 so that the interference fringe is recorded in the hologram storage medium 12. A pattern is formed on the hologram storage medium 12 by the interference of the reference light and the object light, And is recorded as hologram information.

Thus, when the hologram storage medium 12 is irradiated with light having the same wavelength and phase as the wavelength and phase of the reference light used for recording the hologram information on the hologram storage medium 12, the hologram is reproduced. Thus, the wavelength and phase of light by the light source 11 of the present invention may include the same wavelength and phase of the reference light, respectively.

Further, the position of the light source 11 and the placement angle of the reflection plate, which will be described later, can be determined so that the direction and angle of the reference light with respect to the hologram storage medium 12 are equalized. That is, the direction and angle of the reference light directed to the hologram storage medium 12 are the same as the direction and the angle at which the light of the light source 11 (hereinafter referred to as reproduction light) directed to the hologram storage medium 12 is irradiated.

Thus, synchronization with respect to the position of the object and the hologram can be realized. That is, by making the directions and angles of the reference light and the reproduction light respectively the same, the hologram is formed at the position where the object was located with respect to the hologram storage medium 12. [

The hologram storage medium 12 according to the embodiment of the present invention is preferably formed in a plate shape such as a film, but is not limited thereto.

Figure 1 shows a hologram storage medium 12 forming a transmissive hologram. The hologram can be formed as the light of the light source 11 passes through the hologram storage medium 12. [

2, the vehicle hologram image reproducing lamp 20 includes a light source 21 and a hologram storage medium 22. [

The functions of the light source 21 and the hologram storage medium 22 are the same as or similar to those of the light source 11 and the hologram storage medium 12, and therefore, detailed description thereof will be omitted. 2 shows a hologram storage medium 22 forming a reflection type hologram. The hologram can be formed as the light of the light source 21 is reflected by the hologram storage medium 22. [

3 and 4 are views showing a hologram formed by a hologram image reproducing lamp for a vehicle according to an embodiment of the present invention.

As described above, in the present invention, the hologram storage media 12 and 22 can form a transmission type hologram H or a reflection type hologram H. 3, the light by the light source 11 is transmitted through the hologram storage medium 12 to form the transmissive hologram H, or the light by the light source 21 as shown in FIG. 4 The reflection hologram H is formed by being reflected by the hologram storage medium 22.

For the formation of the transmission type hologram H, the area of the hologram storage medium 12 in which the hologram information for the transmission type hologram H is recorded may have a transmittance of a predetermined size or more. Similarly, in order to form the reflection hologram H, the area of the hologram storage medium 22 in which the hologram information for the reflection hologram H is recorded may have a reflectance of at least a predetermined value.

Meanwhile, although not shown, the vehicle hologram image reproducing lamps 10 and 20 may further include a reflection plate for reflecting the light of the light sources 11 and 21. A sufficient distance must be secured between the light sources 11 and 21 and the hologram storage media 12 and 22 in order to form a correct hologram. However, it may be difficult to secure a sufficient direct distance between the light sources 11 and 21 and the hologram storage media 12 and 22 structurally.

In this case, at least one reflector can reflect light from the light sources 11 and 21, thereby ensuring a sufficient distance between the light sources 11 and 21 and the hologram storage media 12 and 22.

In addition, a reflector may be provided to realize an appropriate irradiation direction and angle of the reproduction light.

The hologram image reproducing lamps 10 and 20 for a vehicle according to the embodiment of the present invention can be used in a housing of a lamp which forms a unique light pattern such as a headlight, a fog lamp, a tail lamp, a brake lamp, a turn signal lamp, a position lamp, . That is, the vehicle equipped with the hologram image reproducing lamps 10 and 20 for a vehicle according to the present invention can be used as a hologram image reproducing lamp in which a hologram is formed adjacent to a light pattern such as a headlight, a fog light, a tail light, a brake, Can be formed. The light pattern and the hologram can be irradiated in the same direction or in a similar direction. Thus, the observer can simultaneously observe the light pattern and the hologram.

Hereinafter, the structure and function of the hologram image reproducing lamp for a vehicle according to an embodiment of the present invention will be described in detail.

FIG. 5 is a block diagram of a hologram image reproducing lamp for a vehicle according to an embodiment of the present invention, FIG. 6 is a view illustrating a hologram forming unit according to an embodiment of the present invention, FIG. 7 is a cross- Sectional view.

Referring to FIG. 5, the vehicle hologram image reproducing lamp 30 includes a light irradiating unit 100 and a hologram forming unit 200.

The light irradiation unit 100 serves to irradiate light. The light irradiation unit 100 according to the embodiment of the present invention can irradiate a plurality of lights. For this, the light irradiation unit 100 may include at least one light source. A plurality of light sources emit a plurality of lights, and one light source emits a plurality of lights.

The hologram image reproducing lamp 30 for a vehicle may be provided with a reflection plate to generate a plurality of lights by one light source. The reflector reflects light emitted by one light source to generate a plurality of lights. At least one reflector may be provided depending on the number of light to be generated or the angle of light to be implemented.

For example, in the present invention, at least one reflector may include a first reflector and a second reflector. The first reflector reflects the light irradiated by the one light source to generate the first reflected light, and the second reflector reflects the first reflected light to generate the second reflected light incident on the hologram forming unit 200.

Here, the first reflection plate and the second reflection plate may be disposed so that an extension line parallel to the main emission direction of the second reflected light is staggered with an extension line parallel to the main emission direction of the light emitted by one light source. That is, the incident angle at which light irradiated by one light source is incident on the hologram forming unit 200 and the incident angle at which the second reflected light generated by the second reflecting plate are incident on the hologram forming unit 200 may be different will be.

As a plurality of lights are incident at different incidence angles, the hologram forming unit 200 can individually form holograms for each light.

Alternatively, in the present invention, the at least one reflector may include at least one of a direct reflector, a first hologram reflector, a second hologram reflector and a double reflector.

The first hologram reflector reflects the light transmitted through the hologram forming unit 200 and the second hologram reflector reflects the light reflected by the hologram forming unit 200 And the double reflection plate can reflect the reflection light generated by the first hologram reflection plate or the second hologram reflection plate. The hologram image reproducing lamp 30 for a vehicle according to the embodiment of the present invention may optionally include a direct reflector, a first hologram reflector, a second hologram reflector, and a double reflector, Will be described later.

The hologram forming unit 200 may include a plurality of hologram recording media in which hologram information is recorded. Thus, the hologram forming unit 200 can form a plurality of holograms corresponding to a plurality of hologram recording media by receiving the light irradiated from the light irradiation unit 100. A plurality of lights are incident on the hologram forming unit 200 from the light irradiation unit 100, and the hologram forming unit 200 forms a plurality of holograms corresponding to a plurality of lights.

Each of the plurality of lights irradiated by the light irradiation unit 100 can serve as a reproduction light. The light irradiation unit 100 irradiates a plurality of lights corresponding to each of the plurality of hologram storage media, wherein each of the plurality of lights is irradiated in the direction and angle of the reference light of the corresponding hologram storage medium. Thus, each of the plurality of lights is incident on the hologram storage medium corresponding thereto in an appropriate direction, and each hologram storage medium forms a hologram according to the hologram information recorded therein.

In particular, when the light irradiating unit 100 includes a plurality of light sources, an extension line parallel to the main light emission direction of the light emitted by at least one of the plurality of light sources is extended to an extension line parallel to the main light emission direction of the light emitted by the remaining light sources A plurality of light sources may be arranged so as to be staggered. That is, the incident angle at which light from some light sources including a plurality of light sources enter the hologram forming unit 200 may be different from the angle of incidence at which the light from some light source enters the hologram forming unit 200 .

As a plurality of lights are incident at different incidence angles, the hologram forming unit 200 can individually form holograms for each light.

At least one of the plurality of light sources may be different from at least one of the remaining light sources, the wavelength of the light, the phase, and the angle of incidence to the hologram forming unit 200 when the light irradiation unit 100 includes a plurality of light sources. In the present invention, light may have a plurality of optical properties such as a wavelength, a phase and an incident angle. Light emitted from some of the plurality of light sources and emitted by some other light source may have a plurality of light properties At least one can be different.

As described above, since a plurality of lights having different optical properties are incident on the hologram forming unit 200, each of the plurality of hologram recording media included in the hologram forming unit 200 reproduces only the light having the optical property corresponding thereto It is possible to form a hologram by using it as light.

Referring to FIG. 6, the hologram forming unit 200 includes a base plate 210 and hologram plates 221 and 222.

The base plate 210 serves to maintain the shape of the hologram forming unit 200. For example, the hologram forming unit 200 may be planar or curved, and the base plate 210 plays a role in maintaining the shape of the flat or curved surface of the hologram forming unit 200. Therefore, it is preferable that the base plate 210 has a rigidity of at least a certain level. In addition, the base plate 210 may be made of a transparent material or a semi-permeable material. For example, transparent acrylic or translucent acrylic may serve as base plate 210. [

The hologram plates 221 and 222 may be attached to the wide surface of the base plate 210. 6 shows two hologram plates 221 and 222. The first hologram plate 221 and the second hologram plate 222 may be attached to both sides of the base plate 210, respectively.

The first hologram plate 221 and the second hologram plate 222 may each include a hologram storage medium. Hereinafter, the hologram storage medium included in the first hologram plate 221 is referred to as a first hologram storage medium, and the hologram storage medium included in the second hologram plate 222 is referred to as a second hologram storage medium.

Since the hologram forming unit 200 includes two hologram storage media, two holograms can be formed when appropriate reproduction light corresponding to each hologram storage medium is incident.

Referring to FIG. 7, the hologram plates 221 and 222 include an adhesive 231, a hologram storage medium 232, a reinforcing film 233, and a protective film 234.

The adhesive 231 may be provided for adhesion with the base plate 210. The adhesive 231 may be formed in the form of a film and provided between the hologram storage medium 232 and the base plate 210. Accordingly, the hologram storage medium 232 can be kept attached to the base plate 210.

The reinforcing film 233 serves to protect the hologram storage medium 232 from external impact. The hologram information recorded on the hologram storage medium 232 by the reinforcing film 233 is protected from external impact and can maintain its shape. For example, polycarbonate may serve as the reinforcing membrane 233, but is not limited thereto.

The protective film 234 serves to prevent the surface damage of the reinforcing film 233. If the surface of the reinforcing film 233 is damaged, the transmittance may be reduced and the reproducing light may not be transmitted to the hologram storage medium 232 correctly. The protective film 234 prevents the surface of the reinforcing film 233 from being damaged The transmittance of the film 233 can be maintained. Alternatively, when the protective film 234 is damaged, the light transmittance may be reduced. In this case, it is possible to prevent the decrease of the light transmittance by replacing only the protective film 234.

The reinforcing film 233 and the protective film 234 are preferably made of a transparent material. Thus, the hologram can be generated by transmitting the reproduction light incident on the hologram plates 221 and 222 through the hologram storage medium 232 with a sufficient amount of light.

The adhesive 231 is also preferably made of a transparent material. According to an embodiment of the present invention, a hologram may be formed by a hologram storage medium included in another hologram plate while light incident on one hologram plate is incident on another hologram plate. To this end, both the adhesive 231 and the base plate 210 may be made of a transparent material.

5, the light irradiating unit 100 and the hologram forming unit 200 according to the embodiment of the present invention may have a unique shape such as a headlamp, a fog light, a tail light, a brake, a turn signal lamp, a position light, And may be provided inside a housing of a lamp that forms one light pattern. Thus, a hologram can be formed adjacent to the light pattern. Alternatively, according to another embodiment of the present invention, a hologram may be formed as a light pattern.

Hereinafter, a plurality of holograms are formed in various ways by the hologram image reproducing lamp 30 for a vehicle according to the present invention with reference to FIGS. 8 to 13. FIG.

8 to 13 are views showing that a plurality of holograms are formed by a hologram image 1 reproduction lamp for a vehicle according to an embodiment of the present invention.

Referring to FIG. 8, the vehicle hologram image reproducing lamp 30 may include a first light source 110 and a second light source 120, which are different from each other.

The light L1 of the first light source 110 is transmitted through the first hologram storage medium 232a to form the first hologram H1 and the light of the second light source 120 (Hereinafter, referred to as a second light) L2 can be transmitted through the second hologram storage medium 232b to form the second hologram H2. To this end, the wavelength, phase, and incidence angle of the first light L1 are the same as the wavelength, phase, and incidence angle of the reference light used to record the hologram information of the first hologram storage medium 232a, and the second light L2 The phase, and the incident angle of the second hologram recording medium 232b may be the same as the wavelength, phase, and incidence angle of the reference light used to record the hologram information of the second hologram storage medium 232b. Here, the incident angle represents the angle at which light enters the holographic storage medium.

At least one of the wavelength and the phase may be different while the first light L1 and the second light L2 are irradiated in parallel. The first light L1 can not act as the reproduction light of the second hologram storage medium 232b because at least one of the wavelengths and the phases of the first light L1 and the second light L2 is different from each other, (L2) does not act as reproduction light of the first hologram storage medium 232a. Accordingly, when the first light L1 is incident on the hologram forming unit 200, the first light L1 serves as reproduction light of the first hologram storage medium 232a, so that the first hologram H1 is formed When the second light L2 is incident on the hologram forming unit 200, the second light L2 serves as the reproducing light of the second hologram storage medium 232b, so that the second hologram H2 is formed .

Referring to FIG. 9, the vehicle hologram image reproducing lamp 30 may include a first light source 110 and a second light source 120, which are different from each other.

The first light L1 of the first light source 110 passes through the first hologram storage medium 232a to form the first hologram H1 and the light of the second light source 120 ) L2 may transmit the second hologram H2 through the second hologram storage medium 232b. To this end, the wavelength, phase, and incidence angle of the first light L1 are the same as the wavelength, phase, and incidence angle of the reference light used to record the hologram information of the first hologram storage medium 232a, and the second light L2 The phase, and the incident angle of the second hologram recording medium 232b may be the same as the wavelength, phase, and incidence angle of the reference light used to record the hologram information of the second hologram storage medium 232b.

The first light source 110 and the second light source 110 are arranged such that an extension line ex1 parallel to the main light emission direction of the first light L1 is offset from an extension line ex2 parallel to the main light emission direction of the second light L2 120 may be disposed. That is, the arrangement of the first light source 110 and the second light source 120 is such that the incidence angle of the first light L1 with respect to the hologram forming unit 200 is different from the incidence angle of the second light L2 Can be determined. The first light L1 can not act as the reproduction light of the second hologram storage medium 232b and the second light L2 can not be reproduced because the incidence angles of the first light L1 and the second light L2 are different, And can not act as reproduction light for the first hologram storage medium 232a. Accordingly, when the first light L1 is incident on the hologram forming unit 200, the first light L1 serves as reproduction light of the first hologram storage medium 232a, so that the first hologram H1 is formed When the second light L2 is incident on the hologram forming unit 200, the second light L2 serves as the reproducing light of the second hologram storage medium 232b, so that the second hologram H2 is formed .

When the incidence angles of the first light L1 and the second light L2 are different, the wavelengths and phases of the first light L1 and the second light L2 may all be the same, some different, or all different .

Referring to FIG. 10, the vehicle hologram image reproducing lamp 30 may include a first light source 110 and a second light source 120, which are different from each other.

The first light L1 of the first light source 110 passes through the first hologram storage medium 232a to form the first hologram H1 and the light of the second light source 120 ) L2 may be reflected by the second hologram storage medium 232b to form the second hologram H2. To this end, the wavelength, phase, and incidence angle of the first light L1 are the same as the wavelength, phase, and incidence angle of the reference light used to record the hologram information of the first hologram storage medium 232a, and the second light L2 The phase, and the incident angle of the second hologram recording medium 232b may be the same as the wavelength, phase, and incidence angle of the reference light used to record the hologram information of the second hologram storage medium 232b.

The second hologram storage medium 232b may be made of a semi-transmissive material to transmit the first light L1 and reflect the second light L2. The first hologram H1 is formed by the light transmitted through the first hologram storage medium 232a and the second hologram storage medium 232b among the first lights L1 and the second hologram And the second hologram H2 may be formed by the light reflected by the storage medium 232b.

The first light L1 can not act as the reproduction light of the second hologram storage medium 232b because the hologram forming method by the first light L1 and the second light L2 is different, Does not act as reproduction light of the first hologram storage medium 232a. Accordingly, when the first light L1 is incident on the hologram forming unit 200, the first light L1 serves as reproduction light of the first hologram storage medium 232a, so that the first hologram H1 is formed When the second light L2 is incident on the hologram forming unit 200, the second light L2 serves as the reproducing light of the second hologram storage medium 232b, so that the second hologram H2 is formed .

Alternatively, the first light source 110 and the second light source 110 may be disposed such that an extension line ex1 parallel to the main light emission direction of the first light L1 is offset from an extension line ex2 parallel to the main light emission direction of the second light L2. The light source 120 may be disposed. That is, the arrangement of the first light source 110 and the second light source 120 is such that the incidence angle of the first light L1 with respect to the hologram forming unit 200 is different from the incidence angle of the second light L2 Can be determined. The first light L1 can not act as the reproduction light of the second hologram storage medium 232b and the second light L2 can not be reproduced because the incidence angles of the first light L1 and the second light L2 are different, And can not act as reproduction light for the first hologram storage medium 232a. Accordingly, when the first light L1 is incident on the hologram forming unit 200, the first light L1 serves as reproduction light of the first hologram storage medium 232a, so that the first hologram H1 is formed When the second light L2 is incident on the hologram forming unit 200, the second light L2 serves as the reproducing light of the second hologram storage medium 232b, so that the second hologram H2 is formed .

Referring to FIG. 11, the hologram image reproducing lamp 30 for a vehicle may include one light source 130 and two reflectors 310 and 320.

The light L3 irradiated by the light source 130 is transmitted through the first hologram storage medium 232a to form the first hologram H1, (Hereinafter referred to as transmitted light) PL3 through the hologram storage medium 232a to generate the first reflected light RL1 and the second reflector 320 reflects the first reflected light RL1 The second reflected light RL2 can be generated. The first reflector 310 and the second reflector 320 may serve as the first hologram reflector and the second reflector, respectively.

The second hologram H2 may be formed as the second reflected light RL2 incident on the hologram forming unit 200 is reflected by the second hologram storage medium 232b. The wavelength, phase, and incidence angle of the irradiation light L3 are the same as the wavelength, phase, and incidence angle of the reference light used for recording the hologram information of the first hologram storage medium 232a, and the wavelength of the second reflected light RL2, The phase and incidence angles may be the same as the wavelength, phase, and incidence angle of the reference light used to record the hologram information of the second hologram storage medium 232b.

The second hologram storage medium 232b may be made of a semipermeable material to transmit the irradiation light L3 and reflect the second reflected light RL2.

The irradiation light L3 does not act as the reproduction light of the second hologram storage medium 232b and the second reflected light RL2 does not act as the reproduction light of the second hologram storage medium 232b because the hologram forming method by the irradiation light L3 and the second reflected light RL2 is different. And can not act as reproduction light for the first hologram storage medium 232a. Thus, when the irradiation light L3 is incident on the hologram forming unit 200, the irradiation light L3 serves as the reproducing light of the first hologram storage medium 232a to form the first hologram H1, When the second reflected light RL2 is incident on the hologram forming unit 200, the second reflected light RL2 serves as the reproducing light of the second hologram storage medium 232b, so that the second hologram H2 can be formed have.

Particularly, the first reflector 310 and the second reflector (ex2) are arranged such that an extension line ex2 parallel to the main light emission direction of the second reflected light RL2 is offset from an extension line ex1 parallel to the main light emission direction of the light L3 320 may be disposed. That is, the incident angle at which the irradiation light L3 is incident on the hologram forming unit 200 and the incident angle at which the second reflected light RL2 enters the hologram forming unit 200 may be different from each other.

Even if the wavelengths and phases of the illuminating light L3 and the second reflected light RL2 are the same, the hologram forming unit 200 can separate the holograms for the lights L3 and RL2 individually .

Referring to FIG. 12, the hologram image reproducing lamp 30 for a vehicle may include one light source 130 and two reflectors 300a and 300b. Here, the reflectors 300a and 300b may serve as the direct reflector described above.

The lights (irradiation lights) L3a and L3b emitted by the light source 130 can be reflected by the two reflectors 300a and 300b to form two reflected lights RLa and RLb. Thus, the reflected light (hereinafter, referred to as first reflected light) RLa generated by the first reflector 300a passes through the first hologram storage medium 232a to form the first hologram H1, (Hereinafter referred to as a second reflected light) RLb generated by the second hologram storage medium 300b may transmit the second hologram H2 through the second hologram storage medium 232b. For this, the wavelength, phase, and incidence angle of the first reflected light RLa are the same as the wavelength, phase, and incidence angle of the reference light used to record the hologram information of the first hologram storage medium 232a, and the second reflected light RLb The phase, and the incident angle of the second hologram recording medium 232b may be the same as the wavelength, phase, and incidence angle of the reference light used to record the hologram information of the second hologram storage medium 232b.

The incidence angles of the first reflected light RLa and the second reflected light RLb may be different. The first reflected light RLa does not act as the reproduction light of the second hologram storage medium 232b because the incidence angles of the first reflected light RLa and the second reflected light RLb are different and the second reflected light RLb And can not act as reproduction light for the first hologram storage medium 232a. Accordingly, when the first reflected light RLa is incident on the hologram forming unit 200, the first reflected light RLa acts as the reproducing light of the first hologram storage medium 232a to form the first hologram H1 When the second reflected light RLb is incident on the hologram forming unit 200, the second reflected light RLb serves as the reproducing light of the second hologram storage medium 232b, so that the second hologram H2 is formed .

Referring to FIG. 13, the hologram image reproducing lamp 30 for a vehicle may include one light source 130 and one reflector 300. Here, the reflection plate 300 may serve as the second hologram reflector.

The light L3 irradiated by the light source 130 passes through the first hologram storage medium 232a to form the first hologram H1 and a part DL of the irradiated light L3 is reflected And may be reflected by the plate 210 and incident on the reflection plate 300. The irradiated light DL incident on the reflection plate 300 is reflected to form a reflected light RL and the reflected light RL may be incident on the hologram forming unit 200. In order to selectively reflect or transmit the irradiation light L3, the base plate 210 may be made of a semi-transmissive material.

The irradiation light L3 passes through the first hologram storage medium 232a to form the first hologram H1 and the reflected light RL passes through the second hologram storage medium 232b to transmit the second hologram H2 . To this end, the wavelength, phase, and incidence angle of the irradiation light L3 are the same as the wavelength, phase, and incidence angle of the reference light used for recording the hologram information of the first hologram storage medium 232a, and the wavelength of the reflected light RL Phase and incident angles may be the same as the wavelength, phase, and incidence angle of the reference light used to record the hologram information of the second hologram storage medium 232b.

The light source 130 and the reflection plate 300 may be arranged such that the extension line ex1 parallel to the main light emission direction of the irradiation light L3 is offset from the extension line ex2 parallel to the main light emission direction of the reflected light RL . The arrangement of the light source 130 and the reflection plate 300 can be determined such that the angle of incidence of the irradiation light L3 and the angle of incidence of the reflected light RL to the hologram forming unit 200 are different from each other.

The irradiated light L3 does not act as the reproducing light of the second hologram storage medium 232b and the reflected light RL does not act on the first hologram storage medium 232b because the incidence angles of the irradiated light L3 and the reflected light RL are different, 232a. Thus, when the irradiation light L3 is incident on the hologram forming unit 200, the irradiation light L3 serves as the reproducing light of the first hologram storage medium 232a to form the first hologram H1, When the reflected light RL is incident on the hologram forming unit 200, the reflected light RL may serve as the reproducing light of the second hologram storage medium 232b to form the second hologram H2.

While the present invention has been described in connection with what is presently considered to be practical exemplary embodiments, it is to be understood that the invention is not limited to the disclosed embodiments, but, on the contrary, It will be understood. It is therefore to be understood that the above-described embodiments are illustrative in all aspects and not restrictive.

10, 20, 30: hologram image reproduction lamp for vehicle
11, 21, 110, 120, 130: light source
21, 22: holographic storage medium
100:
200: Hologram forming part
210: base plate
221, 222: hologram plate
300, 300a, 300b, 310, 320,

Claims (16)

A light irradiation unit for irradiating light; And
And a hologram forming unit including a plurality of hologram recording media in which hologram information is recorded and forming a plurality of holograms corresponding to the plurality of hologram recording media upon receiving the irradiated light. The method according to claim 1,
The hologram-
Base plate; And
And first and second hologram plates attached to both sides of the base plate,
Wherein the first and second holographic plates include first and second holographic storage media, respectively. 3. The method of claim 2,
Wherein the base plate is made of a transparent material or a semi-permeable material. 3. The method of claim 2,
Wherein each of the first and second hologram plates comprises:
An adhesive for bonding with the base plate;
A reinforcement film for protecting the first hologram storage medium or the second hologram storage medium from an external impact; And
Further comprising a protective film for preventing surface damage of the reinforcing film. The method according to claim 1,
Wherein each of the plurality of hologram storage media records an interference fringe generated by interference between a reference beam and an object beam as the hologram information. 6. The method of claim 5,
Wherein the wavelength and the phase of the irradiated light include the same wavelength and phase of the reference light, respectively. The method according to claim 1,
Wherein the light irradiation unit irradiates a plurality of lights corresponding to each of the plurality of hologram storage media,
Wherein each of the plurality of lights is irradiated in a direction and angle of a reference light of a corresponding holographic storage medium. 8. The method of claim 7,
Wherein the light irradiation unit includes a plurality of light sources for irradiating the plurality of lights. 9. The method of claim 8,
Wherein a plurality of light sources are disposed so that an extension line parallel to a main light emission direction of light radiated by at least one of the plurality of light sources is offset from an extension line parallel to a main light emission direction of light radiated by the remaining light sources, . 9. The method of claim 8,
Wherein at least one of the plurality of light sources is different from at least one of the remaining light source, the wavelength of the light, the phase, and the angle of incidence to the hologram forming unit. 8. The method of claim 7,
Wherein the light irradiating unit includes one light source,
And the one light source generates the plurality of lights. 12. The method of claim 11,
And at least one reflector for reflecting the light emitted by the one light source to generate the plurality of lights. 13. The method of claim 12,
Wherein the at least one reflector comprises:
A first reflection plate for reflecting the light emitted by the one light source to generate a first reflection light; And
And a second reflector for reflecting the first reflected light and generating a second reflected light incident on the hologram forming unit. 14. The method of claim 13,
Wherein the first reflection plate and the second reflection plate are disposed so that an extension line parallel to the main emission direction of the second reflected light is staggered with an extension line parallel to the main emission direction of the light emitted by the one light source. 13. The method of claim 12,
Wherein the at least one reflector comprises:
A direct reflector for directly reflecting the light irradiated by the one light source;
A first hologram reflector that reflects light transmitted through the hologram forming unit;
A second hologram reflector for reflecting the light reflected by the hologram forming unit; And
And a double reflection plate for reflecting the reflection light generated by the first hologram reflection plate or the second hologram reflection plate. The method according to claim 1,
The light irradiating unit and the hologram forming unit are provided inside a headlamp, a fog lamp, a tail lamp, a brake, a turn signal lamp, a position light, a daytime running or the like of a vehicle.

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