KR102366387B1 - Lamp device and automobile lamp using the same - Google Patents

Abstract

An embodiment of the present invention relates to a lighting device capable of realizing high brightness and a vehicle lamp to which such a high brightness light source is applied. Both the light emitted through the LED chip and the LD light source formed in the opposite direction to the direction of the light emitted from the LED chip are absorbed by the light conversion unit, are converted to a long wavelength, and are emitted upward, and the converted light emitted is reflected and refracted by the optical system, resulting in a Low- A beam hot spot and a high-beam booster are formed to provide a lighting device applicable to a headlamp that can realize high brightness.

Description

A lighting device and a vehicle lamp including the same {Lamp device and automobile lamp using the same}

An embodiment of the present invention relates to a lighting device capable of realizing high brightness and a vehicle lamp to which such a high brightness light source is applied.

Recently, as the importance of marketing for automobile design has grown considerably, the realization of stylish headlamps, which occupy a very large proportion in the front design, has become the key. In addition to the existing high/low beam lights, the DRL (Daytime Running Lamp) and positioning lamps have been implemented as a surface light source and a point light source using LEDs according to the recent legislation to express the brand's identity and implant the brand's unique personality into the headlamp. There is a growing movement to put it in and express it with a consistent face-look.

The recent trend of automotive headlamp design, shown at many motor shows, has a great desire for designers to make the vertical spacing of the headlamp a little thinner, but the light source luminance is It is true that there are practically difficult parts to reduce the size of the optical system (headlamp thickness) to satisfy the law due to innate limitations.

Accordingly, the automotive industry's demand for a high-brightness light source is increasing, and the light source development is in progress in the direction of increasing the brightness by using a high current for the minimum number of LEDs rather than in the direction to obtain a luminous flux by increasing the number of LEDs, but heat dissipation reliability The increase in luminance of white LEDs is not meeting the demand due to such problems.

Recently, a headlamp light source using LD (Laser Diode) to secure high luminance is attracting attention as a future technology. However, due to the significantly lower power consumption efficiency compared to the existing light source, a full generation replacement with an LD (laser diode) light source requires a considerable time, and only the high beam auxiliary light limited to expensive vehicles can be applied. In addition, since the LD (Laser diode) high beam auxiliary light does not share the optical system with the existing LED high beam beam, it requires space for the headlamp to install a separate optical system, which conflicts with the design improvement direction.

Embodiments of the present invention have been devised to solve the above-described problem, and in particular, by arranging two types of light emitting modules that share a light conversion module including a ceramic phosphor to realize a light emitting effect of high luminance, and a vehicle using the same Lamps can be provided.

As a means for solving the above-described problem, in an embodiment of the present invention, a first light emitting module for emitting a first output light; a light conversion module disposed on the optical path of the first light emitting module and converting the first emitted light into first converted light; a second light emitting module spaced apart from the first light emitting module and the light conversion unit and emitting a second output light to the light conversion unit; and an optical system disposed between the first light emitting module and the second light emitting module to reflect or refract the first converted light and the second converted light.

In addition, it is applicable to a vehicle headlamp in which a housing for arranging the lighting device having the above-described structure in a limited space and a lens unit for emitting converted light to the outside are combined.

According to an embodiment of the present invention, there is an effect that can provide lighting capable of realizing a light emitting effect of high brightness by arranging two types of light emitting modules that share a light conversion module including a ceramic phosphor.

In particular, the light emitting module including the LED and the light emitting module including the point light source of high brightness such as LD are arranged to share the same optical system, so that the LED converted light emitted from the LED chip and the laser diode (LD) Due to the optical system that can share the laser converted light emitted from the laser diode at the same time, a small beam from the laser diode LD is irradiated using a larger optical system of the LED, so it is a spot rather than using a separate optical system. Beam performance is improved, and the improved performance can achieve effects such as reduction of the number of laser diodes (LD) or power consumption of laser diodes (LD).

In addition, when the lighting device according to the embodiment of the present invention is applied to a vehicle, in the high-brightness light source applied to the headlamp, most of the heat generated while the laser diode (LD) is additionally operated is transferred to the heat sink included in the LED chip. Since it can be used without a separate heat sink, it is possible to achieve high luminance and reduce costs by not adding a module.

1 is a diagram schematically showing a high-brightness light source applied to a headlamp according to an embodiment of the present invention;
2 is a graph showing a waveform obtained by measuring the luminance of a high luminance light source applied to a headlamp according to an embodiment of the present invention;
3 is a diagram schematically illustrating a visible distance provided by emitting a high-brightness light source applied to a headlamp according to an embodiment of the present invention applied to a vehicle.
4 schematically illustrates a structure when the lighting device according to an embodiment of the present invention is applied to a vehicle headlamp.
5 is a conceptual diagram illustrating a modified embodiment of the structure of the light conversion module of FIG. 1 .
6 to 8 show another embodiment of the optical selection unit in the structure of the optical conversion module according to the embodiment of the present invention described above with reference to FIG. 5 .

Hereinafter, the configuration and operation according to the present invention will be described in detail with reference to the accompanying drawings. In the description with reference to the accompanying drawings, the same components are given the same reference, regardless of the reference numerals, and redundant description thereof will be omitted. Terms such as first, second, etc. may be used to describe various elements, but the elements should not be limited by the terms. The above terms are used only for the purpose of distinguishing one component from another.

1 is a diagram schematically showing the structure of a lighting device according to an embodiment of the present invention.

Referring to FIG. 1 , a lighting device according to an embodiment of the present invention is disposed on a light path of a first light emitting module 10 emitting a first light emitting light and the first light emitting module 10, 1 The light conversion module 20 that absorbs the emitted light and converts it into the first converted light, the first light emitting module 20 and the light conversion module 30 are spaced apart, and the second output light is emitted to the light conversion unit and a second light emitting module 30 and an optical system 40 disposed between the first light emitting module and the second light emitting module to reflect or refract the first converted light and the second converted light. can be In particular, in an embodiment of the present invention, the first light emitting module 10 and the second light emitting module 30 may be arranged in a structure in which the light conversion module 20 and the optical system 40 are shared. .

The first light emitting module 10 is configured to include a first light emitting device for emitting light and a printed circuit board on which it is mounted, and a solid light emitting device may be applied to the first light emitting device as an example. As the solid-state light emitting device, any one selected from among LED, OLED, LD (laser diode), Laser, and VCSEL may be applied. In the embodiment of the present invention, the first light emitting device will be described using an LED.

In addition, the first light emitting module 10 may be configured to further include a heat dissipation module 50 for dissipating heat generated from the first light emitting device at a lower portion. As will be described later, the heat dissipation module 50 is capable of dissipating the heat generated by the second light emitting module 30 in addition to the function of dissipating the heat generated by the first light emitting module 10 to the outside. .

The light conversion module 20 is disposed on the optical path of the first light emitting module, and performs a function of absorbing the first output light and converting it into the first converted light. In particular, the light conversion module 20 may be disposed in contact with or adjacent to the upper portion of the first light emitting device of the first light emitting module 10, or may be disposed spaced apart. In an embodiment of the present invention, the light conversion module 20 is implemented in a structure disposed in direct contact with the upper surface of the LED, which is the first light emitting device, so as to convert some or all of the emitted light into the first converted light of a long wavelength. It will be described as an example including a phosphor layer that performs

The second light emitting module 30 is disposed to be spaced apart from the first light emitting module 10 and the light conversion module 20, and performs a function of emitting second output light to the light conversion module. In particular, in the embodiment of the present invention, the second light emitting module 30 includes a second light emitting device and a printed circuit board on which the second light emitting device is mounted, and the second light emitting device is a light source different from the first light emitting device described above. can be applied. In particular, in order to realize high luminance light, any one light source selected from among LED, OLED, LD (laser diode), Laser, and VCSEL different from the first light emitting device may be applied. In this embodiment, when the first light emitting device is an LED, the second light emitting device will be described using a laser diode (LD) as an example. The second light emitting module 30 is converted in the above-described light conversion module 20 and the second emitted light entering the path of the first converted light of the first light emitting device emitted upward in the reverse direction of the light conversion module. Allows for emission towards some or all of them. Thereafter, the second output light is converted into the second converted light having a long wavelength in the light conversion module 20 and proceeds upward.

Then, part or all of the first converted light and the second converted light are reflected or refracted by the above-described optical system 40 to be emitted.

The optical system module 40 includes various module members for guiding the converted light emitted from the first light emitting module 10 and the second light emitting module 30 and converted by the light conversion module 20 in a desired direction. can be For example, as shown in FIG. 1 , the optical system module 40 is disposed between the first light emitting module 10 and the first light emitting module 30 , and is emitted from the first light emitting module 10 . It can be implemented as a reflector structure that can reflect the converted light from the inside and advance it forward. In this case, the second light emitting module 30 disposed on the optical system module 40 shares the light conversion module 20 of the first light emitting module 10 as in the embodiment of the present invention, The second output light passing through the light conversion module 20 may be disposed to be transmitted to the light conversion module 20 . To this end, in one region of the optical system module 40, a light path guide unit 41 through which the light emitted from the second light emitting module 30 can pass may be provided. In this case, the second emitted light emitted from the second light emitting module 30 reaches the light conversion module 20 via the light path inducing unit 41, and is then converted by the light conversion module 20 It is implemented as the second converted light and is emitted to the upper portion again, and then the second converted light is reflected or refracted inside the reflector structure to be emitted in a desired direction.

The light conversion module 20 may be implemented in a structure in which a single-layer or multi-layer light conversion unit is implemented therein. Further, as will be described later, the outer shell of the light conversion unit may be configured to further include a light selector that selects and transmits or reflects a part of the wavelength of light passing through the light conversion unit. In particular, the light conversion module 20 according to an embodiment of the present invention further includes a sealing member in the outer shell, and the melting point of the sealing member is higher than the melting point of the light conversion unit or the light selection unit. do. This is because, when a laser diode or LED is applied to realize high-brightness light, relatively high current driving is unavoidable. For example, in this embodiment, a melting point of 350° C. or higher of the sealing member may be applied, and materials such as SiO ₂ , Al ₂ O ₃ , and Al ₅ O ₁₂ may be applied as these.

Furthermore, a light-transmitting heat dissipation member is disposed on the outermost upper surface of the light conversion module, so that the heat dissipation effect on the upper surface of the light conversion module can be maximized. And by disposing a structural layer such as an anti-reflection film on the upper surface of the light-transmitting heat dissipation member, it is possible to increase the transmittance of the visible light region. For example, the heat dissipation material formed in the light conversion unit module 20 may be implemented as a structure such as an alumina-based transparent heat dissipation sheet, and then the heat dissipation material is anti-reflection (Anti-Reflection) to increase the transmittance of the visible light region on the upper side. -Reflection) It is possible to realize an anti-reflection film through thin film coating.

2 to 3 show the results of applying the lighting device according to an embodiment of the present invention to a vehicle headlamp. In this case, an LED is used as a light emitting device in the first light emitting module, and a laser diode is used as a light emitting device in the second light emitting module.

Referring to FIGS. 2 and 3 , in general, an LED in the LED chip 10 is a diode that emits light, and is mainly made using a group 3-5 or group 2-6 compound semiconductor and emits light. Light is self-emitting and has no direction, and its wavelength spans a fairly wide area, whereas the laser diode 30 is a laser made of a semiconductor diode. Able to know.

Therefore, referring to the results of FIGS. 2 and 3 and the structure of FIG. 1 , both the light emitted from the LED and the light emitted from the laser diode are absorbed by the light conversion module 20 and After converting to a long wavelength, it is reflected and refracted through the optical system module 40 so that some or all of the converted light can be irradiated to the outside, and the LED chip 10 and the laser diode 30 are coexistent to realize high luminance while enabling individual driving and current control driving according to the purpose.

Therefore, as the LED chip and the laser diode coexist, a small beam of the laser diode is irradiated using a larger optical system of the LED chip, so that the performance of the spot beam is improved. It becomes excellent, and the effect of reducing the number of laser diodes or power consumption of laser diodes can be realized together.

4 schematically illustrates the structure when the lighting device according to the embodiment of the present invention is applied to the vehicle headlamp 1 .

Referring to FIG. 4 , in general, the ratio of the area of the light source to the area of the light emitting surface is proportional to the performance. That is, when the size of the light source is small, the amount of light of the light source is generally weakened, and when the optical system is small, the function of irradiation is improved. In an embodiment of the present invention, a separate optical system is used by using a small beam of a laser diode (LD) in combination with an LED and sharing and using a relatively large-scale optical system applied for LED. The performance of the spot beam (S) becomes more excellent. In addition, as the performance is improved, the number of laser diodes can be reduced, and power consumption of the laser diodes can also be reduced.

For example, in the case of realizing a high beam using an existing LED, the LED chip requires 4 LED chips (1500lm in total) per unit area (1mm ² ), and a 60mmΦ lens is required. That is, it is implemented with a 4mm ² light source and a 2827mm ² optical system (about 700 times), so that a luminous intensity of about 45,000 cd (candela) and a light irradiation distance of 300m can be realized.

On the other hand, in the case of implementing a spot light using only a conventional laser diode (LD), the size of the laser beam can be implemented with 0.35mmΦ (total 450lm) and a 20mmΦ reflector. That is, it is a 0.1mm ² light source and an optical system of 314mm ² (about 30,000 times), which is realized with a luminous intensity of about 135,000 cd (candela) and an irradiation distance of 600m. That is, compared to the above LED light source, the amount of light is 1/3, and even if the area of the optical system is 1/9, the light source size is 40 times smaller, and the irradiation intensity is significantly increased when using a laser diode. .

Therefore, as shown in Fig. 4(a), when the vehicle headlamp 1 is implemented by function such as spot beam (S), high beam (H), and low beam (L), spot beam (135,000 cd), high beam A total luminous intensity of (45 thousand cd) requires 180,000 cd (candela), and when such a headlamp structure is implemented as a pair, a total of 360,000 candela (cd) is realized, which realizes an irradiation distance of about 600m. . Of course, in this case, when implemented as a headlamp module, the 60Φ high beam module and the 20Φ spot beam module need to be installed separately.

However, as shown in FIG. 4(b) , when the lighting device according to the embodiment of the present invention is applied (LD+LED), the spot beam S and the high beam H can be simultaneously implemented. This is a spot beam (400,000 cd) and high beam (45,000 cd), with a total of 445,000 candela (cd). there will be Of course, since the module of the head lamp is also implemented as a single module of 60Φ, the structure is simplified and the concentration of irradiation distance is significantly improved.

Hereinafter, various modified embodiments of the optical conversion module described above with reference to FIG. 1 will be described. As described above, in the case of the light conversion module according to the embodiment of the present invention, the function of converting the first emitted light emitted from the LED and the second emitted light emitted from the laser diode (LD) into a long wavelength is emitted. .

The light conversion module 30 described above in FIG. 1 may be implemented as a light conversion unit which is a single-layer structure composed of a ceramic phosphor layer. In this case, as described above, a sealing member having a high melting point may be implemented, or it may be configured by including a light-transmitting heat dissipation member or an anti-reflection film on the upper portion of the light conversion unit.

5 is a conceptual diagram illustrating a modified embodiment of the structure of the light conversion module of FIG. 1 , and the arrangement structure of the light conversion modules 200 and 300 spaced apart from the light emitting unit 100 will be described. Of course, the arrangement structure is an example, and it is as described above that the light emitting unit 100 and the light conversion modules 200 and 300 can be implemented in a contact form.

Furthermore, the light conversion module according to another embodiment of the present invention, as shown in the structure shown in FIG. 5, absorbs the emitted light (A) and converts it into the converted light (B). And it is also possible to implement as a coupling structure of the light selector 300 for transmitting a part of the wavelength of the emitted light (A) and reflecting a part of the wavelength of the converted light (B). That is, the light conversion unit 200 is disposed on the optical path of the emitted light emitted from the light emitting unit 100, and absorbs, excites, emits and converts the emitted light to form the converted light (B). do. To this end, the light conversion unit 200 may be configured to include a lumiphor material. For example, as shown, the light conversion unit 200 is formed in a plate shape, and may be disposed at a position spaced apart from which the light excited by the light emitting unit 100 can reach. In this case, a space may be formed between the light conversion unit 200 and the light emitting unit 100 . The light conversion unit 200 may perform a function of converting the low-wavelength output light emitting light with a thin spectral width generated by the light emitting unit 100 into white light to form the converted light (B). In addition, the converted light B converted by the light conversion unit 200 may be radiated in all directions based on the central point of the light conversion unit 200 . At this time, the converted light B emitted in all directions is reflected by the light selector 300 to be described later to control the optical path in a specific direction.

Also, in this case, the light selection unit 300 may be spaced apart from the light emitting unit 100 and disposed adjacent to the light conversion unit 200 . In particular, the light selection unit 300 may be formed in a structure in direct contact with the light conversion unit 200, or may be formed in a structure in which the light conversion unit 200 is spaced apart. In any case, when the converted light B that is incident on the light conversion unit 200 and is converted is emitted in all directions, the light selection unit 300 controls the direction of the light in a certain direction through reflection. As shown in FIG. 5 , the light selection unit 300 may be formed in a structure in close contact with the entire surface of the light conversion unit 200 or may be implemented as a structure formed on a part of the surface of the light conversion unit 200 . In particular, when the light selection unit 300 is formed in a structure in close contact with the surface of the light conversion unit 200 , the emitted light excited by the light emitting unit 100 is transmitted to the light conversion unit 200 . It is preferable to apply a possible material, and in the embodiment of the present invention, when the emitted light excited by the light emitting unit 100 is incident toward the light conversion unit 200 at maximum intensity, the incident Although the transmittance may change depending on the angle α, it is more preferable to transmit 70% or more of the incident light as much as possible. This is because, when the transmittance is lower than that, the light loss due to the light selector 300 is too large to match the luminance and intensity of the lighting device. In addition, for this, it is more preferable that the range of the peak wavelength (λpeak) of the emitted light meets 360 nm to 490 nm. In addition, in the light selection unit 300, the spectral wavelength at the point where the transmittance at the point where the output light is incident on and transmitted through the light conversion unit 200 is reduced to 50% or less is the highest wavelength (λpeak) of the emitted light. It is more preferable to be implemented so as to exist within the range of +200 nm. When it exists in this range, the light transmittance according to an incident angle may satisfy 70% or more. Assuming that the emitted light is vertically incident in the embodiment of the present invention, the transmittance for each wavelength of the light selector is high at a low wavelength, and the wavelength (cut-off wavelength) of the highest wavelength (λpeak) of the above-described output light is within 200 nm (cut-off wavelength) As it gradually decreases within the region, the transmittance is lowered and the reflectance is higher at a long wavelength to implement. That is, the emitted light excited by the light emitting unit is a low-wavelength region having high transmittance, and the converted light (white light) is a high-reflectance high-wavelength region, so the cut-off wavelength at which the transmittance is lowered is longer than the output light wavelength. will be formed in For example, if the wavelength of the emitted light excited is 450 nm, the reference wavelength (cut-off wavelength) is formed within 650 nm. In this case, assuming that the reference wavelength is 470 to 500 nm, the wavelength of the phosphor converted light is 520 nm, which is longer than the reference wavelength band.

In addition, when there is an incident angle, not a case in which normal incidence of the emitted light is taken into consideration, the above-described reference wavelength (cut-off wavelength) is gradually formed in a shorter wavelength range as the incident angle increases. For example, when the incident angle of the emitted light is formed to be 5 to 60 degrees, the range of the above-described reference wavelength may be narrowed down to about 50 nm. Therefore, the embodiment in consideration of the angle of incidence in the vertical direction of the present invention is one example, and when the emitted light excited by the light emitting unit 100 is incident toward the light conversion unit 200 at maximum intensity , although the transmittance may change according to the incident angle α, it is more preferable to transmit 70% or more of the incident light as much as possible. In the range of the maximum wavelength of the emitted light, the converted light B changed by the light conversion unit 200 may satisfy the range of the dominant wavelength (λ dominant) of the converted light from 525 nm to 590 nm. In addition, in the main wavelength range of the converted light, when the dominant wavelength emitted in all directions is vertically incident to the light selector 300, it is more preferable that the light selector reflect more than 60% of the light that is vertically incident. Do. In the above-described wavelength range, the light-emitting unit and the light conversion unit are spaced apart to efficiently implement the converted light in the lighting device, and there is a risk of deterioration and deterioration of the phosphor in the light conversion unit due to high temperature and high-integration low-wavelength light. , and it is possible to increase the light efficiency by re-reflecting the converted light in a certain direction.

6 to 8 show another embodiment of the optical selection unit in the structure of the optical conversion module according to the embodiment of the present invention described above with reference to FIG. 5 .

Referring to FIG. 6 , the light selection unit 300 according to another embodiment of the present invention is formed adjacent to one surface of the light conversion unit 200, and in particular, two or more material layers having different refractive indices are stacked. structure can be formed. That is, it can be implemented so that the refractive index of the laminated material is laminated in a multi-layered structure. In this case, the lamination structure is exemplified by only lamination of the thin film structure, but may be implemented as a lamination structure of a thin film and a thin film layer in the form of a periodic grid or a thin film layer having a predetermined pattern structure. Such a laminated structure can further increase the reflectance of the converted light converted by the light conversion unit 200, and can facilitate the adjustment of light transmittance to realize efficient light intensity. The structure shown in FIG. 6 presents an example of laminating a two-layer thin film structure on the surface of the light conversion unit 200, that is, on the surface facing the light emitting unit 100, in this case the light selection unit ( 300 may be implemented as a stacked structure of a first material layer 310 having a first refractive index and a second material layer 320 having a second refractive index. In particular, the refractive indices of the first material layer 310 and the second material layer 320 are different from each other, and in particular, the refractive index may be formed to have a difference of 0.1 or more. This is because, when the difference in refractive index is formed to be less than 0.1, the reflectance decreases in the laminated structure, the control of transmittance becomes difficult, and it is difficult to implement the specificity of the laminated structure.

In particular, in the laminated structure of the light selection unit 300, a structure in which a material having a relatively low refractive index is sequentially laminated from a portion in close contact with the surface of the light conversion unit, and then a material having a high refractive index is laminated alternately. more preferably. For example, when the refractive index of the first material layer 310 is 1.4, the refractive index of the second material layer 320 is preferably implemented to be 1.5 or more.

In addition, as shown in FIG. 7 , in the embodiment of the present invention, various stacking is possible in a structure in which materials having different refractive indices of a two-layer structure are implemented as multi-layers, but preferably, the difference in refractive index is 0.1 or more. Implementation of a structure in which the material layers 310 and the second material layers 320 are alternately stacked can increase the reflectance and is very advantageous in terms of light control. That is, the light selection unit 300 formed in a multi-layer structure can increase the transmittance of the central wavelength I_max of the emitted light A entering the light conversion unit 200 to 70% or more, At the same time, it is possible to increase the reflectance of the converted light (B), which is converted into wavelength in the light conversion unit 300 , to 60% or more of the main wavelength of the converted light. As an embodiment for this, in one embodiment of the present invention, the number of stacks can be implemented as 5 or more layers when the above-described first material layer 310 and second material layer 320 are alternately stacked, and the thickness of the equipment can be reduced. For this purpose, it can be implemented with more than 5 floors and less than 30 floors. To this end, the light selector 300 may be manufactured by creating a thin film in the form of [(L/2)H(L/2)] ^S (L is the optical thickness of the low refractive material, H is the high refractive index material Optical thickness, S means the number of alternating layers for the formula in the text). For example, in the case of realizing the light selector, S is already about 1.5, L is 1.45, and H is 2.3 or more, since the width of the degree of freedom is large among LSH (Low index material/Substrate/High index material). In this case, the larger the difference between L and H, the better. If it is assumed that H is formed in the range of L+0.1 or less, L=1.45 and S=1.50 can be implemented. Of course, this is one embodiment and may be implemented by varying the setting range in various ways. In addition, the above-described light selector portion may be formed of a material having good reflectance and transmittance, such as TiO ₂ , SiO ₂ . The lamination method may be implemented through a process such as sputtering, deposition, dipping, or spray coating.

8 shows the structures of the light conversion unit and the light selection unit included in the light conversion module according to another embodiment of the present invention.

If the structure of FIG. 8 exemplifies the structure in direct contact with the light conversion unit 200 in the embodiment of FIGS. 5 to 7 , the structure of FIG. 8 is an independent film or plate member on the substrate 400 . It is implemented in a structure in which the light selection unit 300 is formed on the surface and the substrate 400 is adhered to the light conversion unit 200 via the adhesive member 410 . In this case, the substrate 400 is preferably formed of a light-transmitting material, and may be formed of, for example, a glass substrate or a resin substrate. Furthermore, if the substrate 400 is a material having light transmittance, any material that can be implemented through processes such as sputtering, deposition, dipping, spray coating, etc. or can be applied. In addition, it is preferable that the adhesive member 410 is made of a light-transmitting material so that the emitted light or the converted light transmitted through the substrate 400 can be transmitted to the light conversion unit 200 . For example, the adhesive member 410 is a transparent polymer sheet, and may be formed of any one of PMMA, A-PET, PETG, and PC, and any material having good light transmission performance may be used. When the substrate 400 is adopted and implemented in a structure to adhere to the light conversion unit 200 , a laminated structure is formed on the substrate itself rather than directly stacking the light selection unit 300 on the light conversion unit 200 . As a separate implementation and bonding, the process is easy, and when a substrate with good adhesion reliability with the optical selector is applied, overall bonding properties are improved.

When the light conversion module of the lighting device according to the above-described embodiment of the present invention is variously modified, a light selector capable of selecting a specific wavelength is formed on the surface of or in the vicinity of the light conversion unit including the phosphor, and the light conversion unit is converted into a light conversion unit. Since the light transmittance of the incident light source can be increased and the light source from returning to the incident direction can be suppressed, the system light design difficulty can be reduced. In addition, since it is possible to increase the output in a specific direction by controlling the emission of the converted light converted by the light conversion unit in all directions (omnidirectional), it is possible to improve the efficiency of a luminaire system for a vehicle using the converted light.

In the detailed description of the present invention as described above, specific embodiments have been described. However, various modifications are possible without departing from the scope of the present invention. The technical spirit of the present invention should not be limited to the above-described embodiments of the present invention, and should be defined by the claims as well as the claims and equivalents.

10: first light emitting module 20: light conversion module
30: second light emitting module 40: optical system 50: heat dissipation module
100: light emitting unit 200: light conversion unit
300: light selector 310: first material layer
320: second material layer 400: substrate
410: adhesive member

Claims (13)

a first light emitting module emitting a first emitted light;
an optical conversion module disposed on the optical path of the first light emitting module, disposed on the upper surface of the first light emitting module, and converting the first emitted light into a first converted light;
an optical system that is spaced apart from the first light emitting module and the light conversion module and reflects or refracts the first converted light; and
and a second light emitting module disposed outside the optical system and emitting a second output light to pass through a hole formed in the optical system,
The second output light passing through the hole is converted into a second converted light by the light conversion module,
The light conversion module,
a light conversion unit including a puppet light material that absorbs the first emitted light and converts it into converted light; and
and a light selector for transmitting a portion of the wavelength of the first emitted light and reflecting a portion of the wavelength of the first converted light,
The optical selector,
It is formed adjacent to one surface of the light conversion unit, and includes a first material layer and a second material layer,
The first material layer and the second material layer,
stacked alternately sequentially from one surface of the adjacent light conversion part,
A lighting device in which the refractive index of the first material layer is smaller than that of the second material layer.
The method according to claim 1,
The refractive index of the first material layer is,
The lighting device is 0.1 or more smaller than the refractive index of the second material layer.
The method according to claim 1,
The light conversion unit,
A lighting device that transmits at least 70% of the first emitted light.
The method according to claim 1,
A spectral wavelength at a point where the transmittance of the first emitted light incident to the light conversion unit is reduced to 50% or less is within +200 nm of the highest wavelength of the first emitted light.
The method according to claim 1,
The highest wavelength of the first emitted light is,
An illumination device of 360 nm to 490 nm.
The method according to claim 1,
Further comprising a sealing member in the outer portion of the light conversion module,
A melting point of the sealing member is higher than a melting point of the light conversion unit or the light selection unit.
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