Lighting device for customized spatial colorization and spatial colorization system including same

Abstract

In a lighting device for customized spatial colorization and a spatial colorization system including same, the lighting device provides output light, which is white light, actively controls the color of an object being outwardly displayed by the output light, and includes a light source, a spectrum control unit, and an output light control unit. The light source generates input light including wavelengths in the visible light region. The spectrum control unit receives the input light, divides the input light by wavelength, and independently controls the transmission rate of each wavelength to selectively provide spectrum-controlled light. The output light control unit collects the light selectively provided by the spectrum control unit and provides the collected light as the output light which is the white light.

Description

Lighting device for customized space coloring, and space coloring system including the same

[0001] The present invention relates to a lighting device for customized spatial coloring, and a spatial coloring system including the same, and more particularly, to a lighting device for customized spatial coloring, and a spatial coloring system including the same, which can implement customized spatial coloring by providing light having various spectra to actively control the color of an object located in a space.

[0002] Recently, in response to diverse consumer needs and technological advancements, technologies that allow products to actively change color are being developed.

[0003] For example, in the case of Korean Patent Publication No. 10-2022-0094196, a technology is disclosed for manufacturing a three-dimensional object including a light-transmitting substrate and an electrophoretic medium, and changing the color of the object.

[0004] In addition, Japanese Patent No. 6319922 discloses a product that changes color by stacking optical structures, and U.S. Patent Publication No. 2024-0151995 discloses a technology that changes the color of an object by changing the temperature, pressure, voltage, bending, viewing angle, etc. of the object.

[0005] As mentioned above, although technologies to actively change the color of a product in various ways are being developed, the products developed to date are only designed to change the characteristics of the product itself as a factor that designs the structure of the product itself or affects the product's display color.

[0006] Accordingly, complex design and manufacturing processes are required to produce products with variable colors, and there is a limitation in that it is difficult to vary the color of pre-manufactured products that do not have the above-mentioned structure.

[0007] Furthermore, since the color of the product itself is variable, the technological development for lighting devices approved for the product is insufficient.

[0008] Accordingly, the technical problem of the present invention is conceived from this point, and the purpose of the present invention is to provide a lighting device for customized space coloring that can diversely control the spectrum of light provided to an object in order to actively control the color of an object located in space without using the structure or characteristics of the object.

[0009] In addition, another object of the present invention is to provide a spatial colorization system including the lighting device.

[0010] According to one embodiment of the present invention for realizing the above-described object, a lighting device provides output light that is white light, and actively controls the color of an object displayed externally by the output light, and includes a light source, a spectrum control unit, and an output light control unit. The light source generates input light including a wavelength in the visible light range. The spectrum control unit receives the input light, divides it by wavelength, and independently controls the transmission rate of each wavelength to selectively provide light whose spectrum is controlled. The output light control unit collects light selectively provided from the spectrum control unit and provides it as output light that is white light.

[0011] In one embodiment, the invention may further include an input light control unit interposed between the light source and the spectrum control unit to filter the input light and transmit only visible light.

[0012] In one embodiment, the spectrum control unit may include a dispersion unit that provides dispersed light by dispersing the input light by wavelength, and a modulation unit that independently controls the transmission rate of each wavelength of the dispersed light.

[0013] In one embodiment, the modulation unit can independently control the transmission rate of each wavelength of the dispersed light to change the color of the object while maintaining the output light as white light.

[0014] In one embodiment, the dispersing unit may be a diffraction grating, a prism, or a multi-wavelength dispersing device.

[0015] In one embodiment, the spectrum control unit may include a plurality of spectrum control units, and each of the spectrum control units may include a dichroic filter that selectively reflects the input light by wavelength to provide reflected light, and a modulation unit that controls the amount of the reflected light to provide modulated light.

[0016] In one embodiment, the modulated light provided from each of the spectrum control units can be selectively combined with modulated light provided from other spectrum control units to vary the color of the object while maintaining the output light as white light.

[0017] In one embodiment, the spectrum-controlled light is light having the same wavelength but with spectra controlled differently, and by intentionally providing the spectrum-controlled light, the color of an object displayed externally can be intentionally controlled.

[0018] According to another embodiment of the present invention for realizing the above-described purpose, a lighting device provides output light that is white light, actively controls the color of an object displayed externally by the output light, emits light including a wavelength in the visible light range, and includes a spectrum control unit that independently controls the luminance of each wavelength of the emitted light to selectively provide light with a controlled spectrum.

[0019] In one embodiment, the spectrum control unit includes a plurality of light emitting units, each of which can selectively emit light of a different wavelength or emit light of a specific wavelength at a different intensity.

[0020] In one embodiment, each of the light emitting units may be any one of a light emitting diode (LED), an organic light emitting diode (OLED), and a quantum dot electroluminescence (QD-EL).

[0021] In one embodiment, the spectrum control unit may include a light source unit including a plurality of light emitting units that emit light of different wavelengths, and a driving unit that controls whether each of the light emitting units emits light and the intensity of the light emission.

[0022] In one embodiment, the spectrum control unit may include a light source unit including a plurality of light emitting units that emit light of different wavelengths, and a panel unit positioned above the light source unit to individually control the transmission rate of light emitted from the light emitting units.

[0023] In one embodiment, the spectrum control unit may include a light source unit including a plurality of light emitting units, each of which emits light including all wavelengths in the visible light range, a panel unit positioned above the light source unit to individually control the transmission rate of light emitted from the light emitting units, and a color filter positioned above the panel unit to selectively transmit light of different wavelength bands.

[0024] In one embodiment, each of the light emitting units may be any one of a light emitting diode (LED), an organic light emitting diode (OLED), and a quantum dot electroluminescence (QD-EL).

[0025] In one embodiment, the spectrum control unit may include a light source unit that emits light including all wavelengths in the visible light range, a guide panel that converts the direction of light from the light source unit upward, and a control panel located above the guide panel that individually controls the transmission rate of the light and selectively transmits light of different wavelength bands.

[0026] In accordance with another embodiment of the present invention, a spatial colorization system for realizing the aforementioned object includes the lighting device and an object. The object reflects output lights having different spectra provided by the lighting device to display different colors externally, and output light not reflected from the object is displayed as white light.

[0027] In one embodiment, the object comprises a base substrate and at least one structural layer laminated on the base substrate, wherein the structural layer may comprise any one of a nano-thin film layer, a layer having homogeneous or heterogeneous nanoparticles dispersed therein, and a layer having a metasurface.

[0028] According to embodiments of the present invention, in an environment where the same white light is provided externally, the display color of an object can be varied in various ways depending on the provided light, thereby enabling active control of the color of the object and enabling the object to be viewed in various colors.

[0029] That is, by appropriately changing the spectral distribution of light, the color change can be intentionally and purposefully varied so that the user can express the color he or she wants. Specifically, by utilizing the so-called metamerism, in which there are countless visible light spectrums that can display the same white light, the surroundings other than the object maintain the same white light, and only the object can implement variable visibility in various colors. Since the color of the object can be varied by controlling external light without changing the material, element, or characteristics of the object itself, active control of the color of the object can be implemented more easily.

[0030] Meanwhile, as a lighting device providing white light with the above-described various spectra, it is possible to provide light that selectively provides light only for a specific wavelength using a diffraction grating, a prism, or a multi-wavelength dispersion device and a modulator, thereby providing light that displays white light to the outside while having a various spectra, thereby enabling active control of the color of the object.

[0031] In addition, as the above lighting device, white light having a variety of spectra can be provided through selective reflection and superposition of specific wavelengths using a dichroic filter and a modulator.

[0032] In addition, as the lighting device, white light having various spectrums can be provided by arranging light emitting units that emit light of various wavelengths, selectively controlling the light emitting state of each light emitting unit, or selectively transmitting light emitted through each light emitting unit.

[0033] In addition, as the lighting device, white light having various spectra can be provided by applying a light emitting unit that emits white light and providing a panel portion or color filter that varies the transmission rate for each wavelength.

[0034] Furthermore, since color changes according to the spectrum may be limited in the case of a pre-fabricated object, by fabricating the object into a structure in which structural layers are laminated, a more diverse range of colors that can be selected by the user can be implemented, thereby diversifying spatial colorization. In this case, the structural layers can be fabricated to include any one of a nano-thin film layer, a layer in which homogeneous or heterogeneous nanoparticles are dispersed, and a layer having a metasurface, thereby ensuring design diversity and flexibility.

[0035] FIG. 1 is a block diagram illustrating a spatial colorization system according to one embodiment of the present invention.

[0036] Figures 2a and 2b are schematic diagrams illustrating a state in which the same object is displayed in different colors using the spatial colorization system of Figure 1.

[0037] Fig. 3a is a graph illustrating the spectral characteristics of different lights in the spatial colorization system of Fig. 1, and Fig. 3b is a graph illustrating the color space of different lights of Fig. 3a and the colors displayed through it.

[0038] Fig. 4 is a graph for explaining the concept of controlling the spectrum of lights provided by the lighting device of Fig. 1.

[0039] Fig. 5 is a structural diagram illustrating the lighting device of Fig. 1.

[0040] Figure 6 is a structural diagram illustrating a lighting device according to another embodiment of the present invention.

[0041] Figure 7 is a structural diagram illustrating a lighting device according to another embodiment of the present invention.

[0042] Fig. 8 is a cross-sectional view illustrating a lighting device according to another embodiment of the present invention.

[0043] Fig. 9 is a cross-sectional view illustrating a lighting device according to another embodiment of the present invention.

[0044] Fig. 10 is a cross-sectional view illustrating a lighting device according to another embodiment of the present invention.

[0045] Fig. 11 is a cross-sectional view showing a lighting device according to another embodiment of the present invention.

[0046] Figures 12 and 13 are cross-sectional views illustrating various examples of the object of Figure 1.

[0047]

[0048] The present invention is susceptible to various modifications and takes various forms, and thus embodiments are described in detail herein. However, this is not intended to limit the present invention to a specific disclosed form, but rather to encompass all modifications, equivalents, and alternatives falling within the spirit and technical scope of the present invention. Similar reference numerals have been used to designate similar components throughout the description of each drawing. While terms such as "first," "second," etc. may be used to describe various components, these components should not be limited by these terms.

[0049] The above terms are used solely for the purpose of distinguishing one component from another. The terminology used in this application is only used to describe specific embodiments and is not intended to limit the present invention. The singular expression includes the plural expression unless the context clearly indicates otherwise. In this application, it should be understood that the terms "comprises" or "consists of" indicate the presence of a feature, number, step, operation, component, part, or combination thereof described in the specification, but do not preclude the possibility of the presence or addition of one or more other features, numbers, steps, operations, components, parts, or combinations thereof.

[0050] Hereinafter, with reference to the attached drawings, a preferred embodiment of the present invention will be described in more detail.

[0051] FIG. 1 is a block diagram illustrating a spatial colorization system according to one embodiment of the present invention.

[0052] Referring to FIG. 1, the spatial colorization system (1) according to the present embodiment includes a lighting device (100), an object (200), a database (50), and a control unit (60).

[0053] The above lighting device (100) selectively provides a plurality of lights (11, 12, 13, ...) to the object (200), and it is sufficient if it includes a function for selecting the lights. That is, the lighting device (100) may be any commonly used indoor / outdoor light or indoor / outdoor lighting, and its specific form or light irradiation method is not limited.

[0054] The lights (11, 12, 13, ...) provided by the lighting device (100) are lights having different spectra, and the spectrum of the first light (11), the spectrum of the second light (12), and the spectrum of the third light (13) may be different from each other.

[0055] In this case, the concept that the spectra are different means that the first to third lights (11, 12, 13) are lights having the same wavelength but different intensities, or that the first to third lights (11, 12, 13) are lights having different wavelengths. Therefore, the description below that the spectra are lights having different intensities should be interpreted to include both meanings. However, if it is described as lights having different intensities or lights having different wavelengths, the meaning should be interpreted as lights having different intensities or different wavelengths.

[0056] In addition, although the drawing exemplifies selectively irradiating three different lights, the number of lights provided by the lighting device (100) is not limited.

[0057] By the light selected from the above lighting device (100), the object (200) receives the selected light and reflects the selected light to display a specific color to the outside.

[0058] At this time, the light provided from the lighting device (100) is reflected by the object (200) and displays a specific color to the outside, but the light that is not provided to the object (200) but provided to the surrounding space is displayed as white light (40). This is because all of the lights (11, 12, 13, ...) provided from the lighting device (100) have something in common, and regardless of which light is selected and provided, the light that is not provided to the object (200) but provided to the surrounding space is perceived as white light (40) to the user.

[0059] Therefore, the user perceives a specific color only for the object (200) in the space recognized by the white light (40).

[0060] The optical characteristics related to this will be described with reference to the drawings described below, and similarly, the configuration of the lighting device (100) that provides light having the above-described characteristics will be described with reference to the drawings described below.

[0061] The above object (200) is located in a specific space, and the shape, arrangement, structure, etc. of the object (200) are not particularly limited. However, it is sufficient for the object (200) to be located in a position where it can receive light (11, 12, 13, ...) irradiated by the lighting device (100).

[0062] Meanwhile, in order to implement the spatial colorization system (1) in this embodiment, light other than the light (11, 12, 13, ...) provided by the lighting device (100) must be blocked from being provided to the object (200).

[0063] That is, the object (200) must be located indoors where light, such as sunlight, is blocked, or, if the object (200) is located outdoors, it must be in a nighttime environment where sunlight is extinguished. In addition, the object (200) may be located in an environment or space where light other than the light provided by the lighting device (100) is blocked.

[0064] In addition, the object (200) may be an object that has already been manufactured and used, and may be, for example, a sofa, bedding, a dining table, and other various objects that are not limited to those that are already in use. That is, in the case of the space colorization system (10) according to the present embodiment, the spectrum of light provided to the object (200) is controlled differently, and the color of the object (200) is expressed differently, so that the characteristics of the light are controlled, not the characteristics of the object.

[0065] In contrast, the object (200) may have a special structure to express colors more diversely by controlling the spectrum of the light differently, and the structural features of this object (200) will be described with reference to the drawings described below.

[0066] Thus, when a specific light (11, 12, 13) selected as the object (200) is provided, the object (200) reflects the provided light and is displayed in a specific color (31, 32, 33).

[0067] At this time, the first color (31) reflected and displayed from the object (200) as the first light (11) is provided may be different from the second color (32) according to the second light (12) and the third color (33) according to the third light (13). Through this, the object (200) displays different colors to the outside depending on the selected light.

[0068] Meanwhile, the recognition unit (30) that recognizes the first to third colors (31, 32, 33) may be, for example, the user's vision.

[0069] As described above, through the spatial colorization system (1) according to the present embodiment, colors reflected from the object (200) can be displayed differently by selecting lights having different spectra provided through the lighting device (100).

[0070] Meanwhile, the above-mentioned spatial colorization system (1) can be controlled so that the viewing unit (30) displays the object (200) in a specific color through the database (50) and the control unit (60).

[0071] That is, the database (50) stores in advance information about the object (200), such as information about the spectrum of light reflected when light having a specific spectrum is incident, i.e., information about the reflection spectrum. Information about the reflection spectrum can be acquired and stored in advance by obtaining information about the spectrum of reflected light compared to the spectrum of various incident lights.

[0072] Accordingly, the control unit (60) controls the selection of the light according to a user's request to have the object (200) display a specific color based on information about the reflection spectrum of each object stored in the database (50). That is, if the user requests that the object (200) be displayed in a first color (31), the control unit (60) controls the first light (11) to be irradiated from the lighting device (100) so that the object (200) is displayed in the first color (31).

[0073] Thus, the control unit (60) can control the object (200) to be displayed in a required color according to the user's request by simply selecting light, so that the object (200) can be implemented in a specific color with great ease.

[0074] Figures 2a and 2b are schematic diagrams illustrating a state in which the same object is displayed in different colors using the spatial colorization system of Figure 1.

[0075] Referring to FIG. 2a, when the first light (11) is provided from the lighting device (100) to an object (200, for example, a sofa) located in an indoor space (5), the color reflected from the object (200) and displayed on the viewing portion (30) becomes the first color (31).

[0076] At this time, the color of the object (200) is the first color (31), but in the area where the first light (11) reaches, excluding the object (200) in the indoor space (5), it is displayed as white light (40) different from the first color (31).

[0077] Accordingly, the above-mentioned recognition unit (30) recognizes the first color (31) for the object (200) and recognizes white light (40) in other spaces.

[0078] At this time, referring to FIG. 2b, when the lighting device (100) provides second light (12) having a different spectrum from the first light (11) to the same object (200) located in the same indoor space (5), the color reflected from the object (200) and displayed on the viewing portion (30) becomes the second color (32).

[0079] Here, the second color (32) is different from the first color (31), and the color of the object (200) is the second color (32), but in the area where the second light (12) reaches, excluding the object (200) in the indoor space (5), it is displayed as white light (40) different from the second color (32).

[0080] As described above, even if light (11, 12) recognized as the same white light (40) is provided to the object (200), the colors of the light reflected from the object (200) are different colors (31, 32), and the color of the object (200) can be varied differently by selecting the provided light.

[0081] Meanwhile, the first and second lights (11, 12) in FIGS. 2A and 2B may be lights having substantially different spectra, but having the same wavelength and different light intensities. Thus, by selectively providing lights having different light intensities to the same object (200), the color can be varied.

[0082] Furthermore, although not shown, it is possible to control the color of the object to vary even when the first and second lights are composed of lights having different wavelengths among lights having substantially different spectra.

[0083] The optical properties related to the above are described as follows.

[0084] Fig. 3a is a graph illustrating the spectral characteristics of different lights in the spatial colorization system of Fig. 1, and Fig. 3b is a graph illustrating the color space of different lights of Fig. 3a and the colors displayed through it.

[0085] In general, a specific light can be implemented by combining three different monochromatic lights as in Fig. 3a, and light of a specific color can be displayed by controlling the intensity of the wavelength of the monochromatic lights.

[0086] At this time, light has countless visible light spectrums that display the same color, a property called metamerism. Therefore, even when displaying the same white light, the spectrum it contains can be composed differently, and this metamerism allows the color of the object to be varied differently.

[0087] For example, if the first light (11) is implemented as three monochromatic lights (11a, 11b, 11c) having different wavelength spectra, as shown in FIG. 3a, the first light (11) can be implemented as white light (40) by controlling the intensity of the wavelength (base wavelength) of the monochromatic lights.

[0088] Likewise, even when the second light (12) is implemented as three monochromatic lights (12a, 12b, 12c) having different wavelength spectra, the second light (12) can be implemented as white light (40) by controlling the intensity of the wavelength (base wavelength) of the monochromatic lights.

[0089] That is, as in FIG. 3b, the color of the light displayed by the first light (11) as well as the color of the light displayed by the second light (12) can display white light with the same color as the D65 standard light source color. At this time, the wavelength of each of the monochromatic lights (11a, 11b, 11c) constituting the first light (11) may be a wavelength corresponding to the three vertices of a triangle formed as an expression area on the color space of the first light (11) in FIG. 3b, and the wavelength of each of the monochromatic lights (12a, 12b, 12c) constituting the second light (12) may be a wavelength corresponding to the three vertices of a triangle formed as an expression area on the color space of the second light (12) in FIG. 3b.

[0090] Ultimately, if the first light (11) is composed of a combination of three monochromatic lights (11a, 11b, 11c), and the three monochromatic lights (11a, 11b, 11c) have wavelengths corresponding to the three vertices of a triangle in the color space, which is the expression area expressed by the first light (11), the first light (11) is displayed as white light identical to the D65 standard light source color. The same applies to the second light (12).

[0091] As described above, in a state where three monochromatic lights are selected so that the first light (11) is displayed as white light (i.e., a state where a base wavelength for displaying white light is selected), the first light (12) is configured to additionally select three monochromatic lights, thereby enabling the object (200) to be expressed in a specific color.

[0092] That is, in order to configure the first light (11) for displaying the object (200) with the first color (31), in addition to the three monochromatic lights for displaying white light, three more monochromatic lights having specific wavelengths can be additionally selected to configure the first light (11). Through this, as the first light (11) is used as lighting, the surrounding environment excluding the object (200) is displayed as white light, and the color displayed by being reflected by the object (200) can be implemented through a combination of the additionally selected monochromatic lights.

[0093] This is also the same for the second light (12). That is, in addition to the three monochromatic lights for displaying white light, the second light (12) additionally selects three monochromatic lights having specific wavelengths (at this time, they must be a different combination from the monochromatic lights additionally selected from the first light (11), so that the surrounding environment excluding the object (200) is displayed as white light, and the color displayed by being reflected by the object (200) can be displayed as the second color (32).

[0094] As such, in order to display an object in a specific color, three wavelengths (monochromatic lights) must be selected to display white light as the base wavelength, and additionally, three wavelengths (monochromatic lights) must be selected to display the object in a specific color, ultimately resulting in 3+3 wavelengths being selected.

[0095] Therefore, for N objects, in order to independently control the colors of each of the N objects, 3N wavelengths can be selected to configure the light. In other words, when the lighting is not configured as white light, but rather to simply control the independent colors of N objects, the light can be configured by selecting the wavelengths as described above.

[0096] In contrast, for the N objects, in order to independently control the color displayed outside the objects, i.e. the color of the light, three additional wavelengths must be selected, and thus the light can be composed by selecting (3N+3) wavelengths.

[0097] Meanwhile, the first light (11) or the second light (12) does not necessarily have to be composed of monochromatic lights having wavelengths corresponding to the three vertices of a triangle in the color space of FIG. 3b. That is, the monochromatic lights constituting the first light (11) or the second light (12) may be composed of monochromatic lights corresponding to at least one of the vertices of a polygon, such as a square or a pentagon, in the color space. Furthermore, the monochromatic lights constituting the first light (11) or the second light (12) may also be composed of monochromatic lights corresponding to either of the two endpoints of a line (line, A) extending in a straight line in the color space. In this case, the two endpoints of the line (A) must be located on the boundary line of the area forming the color space, as illustrated.

[0098] This is because, when composing light based on RGB pixels, various colors can be expressed by combining three or more monochromatic lights, but even when composing light with two monochromatic lights, colors can be expressed within a limited range.

[0099]

[0100] Below, various embodiments of a lighting device capable of selectively providing light having different spectra as described above are specifically described.

[0101] Fig. 4 is a graph for explaining the concept of controlling the spectrum of lights provided by the lighting device of Fig. 1.

[0102] First, as previously explained, in order to control the color of the object (200), it is necessary to select a base wavelength band and control the luminescence intensity in each wavelength band. Accordingly, as shown in Fig. 4, it is necessary to divide the wavelength band into N, select each wavelength band, and independently control the intensity in the selected wavelength band.

[0103] Therefore, in the embodiments of the lighting device described below, the structure of the lighting device for selecting a specific wavelength band from the wavelength bands divided into N as described above and independently controlling the intensity of the selected wavelength band is described.

[0104] Fig. 5 is a structural diagram illustrating the lighting device of Fig. 1.

[0105] First, referring to FIG. 5, the lighting device (100) includes a light source (110), an input light control unit (200), an input mirror (300), a spectrum control unit (400), an output mirror (500), and an output light control unit (600).

[0106] The above light source (110) provides input light (120) toward the input light control unit (200). The input light (120) does not necessarily need to be limited to white light, and light including all wavelengths in the visible light range is sufficient.

[0107] That is, even if the input light (120) does not constitute white light, it is sufficient if only the output light (130) ultimately output from the lighting device (100) is constituted of white light.

[0108] The above input light control unit (200) controls the input light (120) and provides it to the input mirror (300), and may specifically include an input lens (210), a visible light filter (220), and a first pinhole (230).

[0109] The input lens (210) collimates the input light (120) to provide the input light (120) in a parallel manner, and the visible light filter (220) selectively transmits only light of a visible wavelength from the parallel input light. In addition, the first pinhole (230) adjusts the spatial width of the light transmitted through the visible light filter (220) and provides it to the input mirror (300).

[0110] The above input mirror (300) changes the light providing direction of the input light (120) and provides it to the spectrum control unit (400).

[0111] The above spectrum control unit (400) selectively provides light with a controlled spectrum by dividing the input light provided by wavelength and independently controlling the transmission rate for each wavelength.

[0112] Meanwhile, in the case of the illustrated spectrum control unit (400), the transmittance for each wavelength is independently controlled through the modulation unit (420) described below. However, the modulation unit (420) is not necessarily limited to transmitting light, and may independently control the reflectance for each wavelength while reflecting the light provided, depending on the embodiment. Accordingly, the following description exemplifies through the drawings that the spectrum control unit (400) independently controls the transmittance for each wavelength. However, since the reflectance can also be independently controlled, the term “transmittance” is used as a term that encompasses both transmittance and reflectance. That is, the spectrum control unit (400) can control both transmittance and reflectance, and thus, the concept of independently controlling the transmittance for each wavelength is described. Furthermore, the meaning of the concept of independently controlling the transmittance is not limited to the spectrum control unit in the present embodiment, and is commonly applied to spectrum control units according to other embodiments described below.

[0113] The above spectrum control unit (400) includes a pair of first and second diffraction gratings (410, 430) and a modulation unit (420).

[0114] The first diffraction grating (410) is a so-called dispersion unit, and provides the so-called dispersed light (440) obtained by dispersing the input light provided through the input mirror (300) by wavelength to the modulation unit (420). That is, the input light is dispersed into N wavelength bands through the first diffraction grating (410), as illustrated in FIG. 4, and provided to the modulation unit (420).

[0115] The above modulation unit (420) is, for example, a spatial transmittance modulator, and independently controls the transmittance of light of each wavelength band dispersed into the N wavelength bands. That is, each of the lights of the first to Nth wavelength bands passes through the modulation unit (420) and the intensity of the light is independently controlled.

[0116] Thus, not only can light of only a certain wavelength band be selectively transmitted and provided, but the intensity of light of the selected wavelength band can also be independently controlled and provided.

[0117] After this, the second diffraction grating (430) aligns the so-called modulated light (450) modulated by passing through the modulation unit (420) in the same propagation direction and provides it to the output mirror (500). At this time, the second diffraction grating (430) only aligns the light of each wavelength included in the modulated light (450) in the same propagation direction, and the light of each wavelength is provided in a spatially scattered form.

[0118] Accordingly, the spatially scattered modulated light is provided to the output light control unit (600) by changing the direction of provision through the output mirror (500).

[0119] At this time, the output light control unit (600) includes a beam alignment unit (610), a second pinhole (620), and an output lens (630). Thus, the beam alignment unit (610) collects the spatially scattered modulated light (450), and may include, for example, an optical component such as an aspherical lens or a prism.

[0120] The second pinhole (620) adjusts the spatial width of the modulated light collected by passing through the beam alignment unit (610) and provides it to the output lens (630), and the output light (130), which is the final reshaped light, is provided through the output lens (630).

[0121] At this time, the output light (130) is white light as described above, and is light that includes a predetermined wavelength or has the intensity of a specific wavelength varied by the spectrum control unit (400).

[0122] As described above, in the lighting device (100) according to the present embodiment, light having different spectra, such as the first to third lights (11, 12, 13), is provided as the output light (130) through the spectrum control unit (400) as described with reference to the preceding FIG. 1.

[0123] Figure 6 is a structural diagram illustrating a lighting device according to another embodiment of the present invention.

[0124] The lighting device (101) according to the present embodiment is different from the lighting device (100) described with reference to FIG. 5 with respect to the spectrum control unit (401), and the same reference numbers are used for the same components, and redundant descriptions are omitted.

[0125] Referring to FIG. 6, the lighting device (101) according to the present embodiment includes a light source (110), an input light control unit (200), an input mirror (301), a spectrum control unit (401), an output mirror (501), and an output light control unit (601).

[0126] In the above lighting device (101), the input light (120) provided from the light source (110) passes through the input light control unit (200) and is provided to the input mirror (301). However, in the case of the present embodiment, the spectrum control unit (401) includes a prism as shown, and the input mirror (301) includes a pair of first and second input mirrors (310, 320), and the first and second input mirrors (310, 320) are arranged parallel to each other.

[0127] Thus, the input light (120) is sequentially changed in direction through the first and second input mirrors (310, 320) and provided to the spectrum control unit (401).

[0128] The above spectrum control unit (401) includes a pair of first and second prisms (411, 431) and a modulation unit (421). At this time, the spectrum control unit (401) selectively provides spectrum-controlled light by dividing the input light provided by wavelength and independently controlling the transmission rate for each wavelength, as described above.

[0129] The first prism (411) above is a so-called dispersion unit, and provides the so-called dispersed light (451) obtained by dispersing the input light provided through the input mirror (301) by wavelength to the modulation unit (421). That is, the input light is dispersed into N wavelength bands through the first prism (411), as illustrated in FIG. 4, and provided to the modulation unit (421).

[0130] At this time, the first prism (411) is not necessarily limited to the form of a prism, and a device that disperses input light into N wavelength bands, such as a multi-wavelength dispersion device, is sufficient. In particular, it may be a prism of a complex shape, such as a dichroic prism or an RGB prism.

[0131] The above modulation unit (421) is, for example, a spatial transmittance modulator, as in FIG. 5, and independently controls the transmittance of light in each wavelength band dispersed into the N wavelength bands. That is, each of the lights in the first to Nth wavelength bands passes through the modulation unit (421) and the intensity of the light is independently controlled.

[0132] Thus, not only can light of only a certain wavelength band be selectively transmitted and provided, but the intensity of light of the selected wavelength band can also be independently controlled and provided.

[0133] After this, the second prism (431) aligns the so-called modulated light (461) that has passed through the modulation unit (421) in the same direction of propagation and provides it to the beam alignment unit (611).

[0134] That is, the output light control unit (601) in the present embodiment includes the beam alignment unit (611), and the beam alignment unit (611) is interposed between the second prism (431) and the output mirror (501).

[0135] Thus, the beam alignment unit (611) collects the spatially scattered modulated light (461) and may include, for example, an optical component such as an aspherical lens or a prism.

[0136] After this, the direction of provision of the collected modulated light is switched through the output mirror (501) including a pair of first and second output mirrors (510, 520).

[0137] Thus, through the second pinhole (620) and output lens (630) included in the output light control unit (601), the spatial width of the collected modulated light is controlled, and the output light (130), which is ultimately reshaped light, is provided.

[0138] At this time, the output light (130) is white light as described above, and is light that includes a predetermined wavelength or has the intensity of a specific wavelength varied by the spectrum control unit (401).

[0139] As described above, in the lighting device (101) according to the present embodiment, through the spectrum control unit (401), light having different spectra, such as the first to third lights (11, 12, 13), is provided as the output light (130), as described with reference to the preceding FIG. 1.

[0140] Figure 7 is a structural diagram illustrating a lighting device according to another embodiment of the present invention.

[0141] The lighting device (102) according to the present embodiment is also different from the lighting device (100) described with reference to FIG. 5 with respect to the spectrum control unit (402), and the same reference numbers are used for the same components, and redundant descriptions are omitted.

[0142] Referring to FIG. 7, the lighting device (102) according to the present embodiment includes a light source (110), an input light control unit (200), a spectrum control unit (402), and an output light control unit (600).

[0143] In the above lighting device (102), the input light (120) provided from the light source (110) passes through the input light control unit (200) and is provided to the spectrum control unit (402).

[0144] However, the input light control unit (200) may not include a separate pinhole.

[0145] In the present embodiment, the spectrum control unit (402) includes a plurality of spectrum control units (452, 453, 454), and modulated light is provided from each spectrum control unit and is selectively combined with modulated light provided from another spectrum control unit, so that the output light (130) can be provided as light having different spectra while maintaining white light.

[0146] For example, the first spectrum control unit (452) includes a first dichroic filter (412), a first modulation unit (422), and a first mirror (432). Accordingly, the input light provided through the input light control unit (200) is provided to the first dichroic filter (412), and the first dichroic filter (412) reflects only some wavelengths {1} among the wavelengths of the visible light range included in the input light (120) and provides them to the first modulation unit (422), and transmits the remaining wavelengths {2, ..., N}.

[0147] At this time, the part of the wavelength {1} reflected from the first dichroic filter (412) passes through the first modulation unit (422), the transmission modulator, and after the light quantity is controlled, the direction is changed and provided through the first mirror (432). Thereafter, the part of the wavelength {1} whose direction is changed through the first mirror (432) and whose light quantity is controlled is selectively combined with light of another wavelength band provided through the second spectrum control unit (453) and provided as the output light (130).

[0148] That is, the second spectrum control unit (453) includes a second dichroic filter (413), a second modulation unit (423), a third dichroic filter (433), and a second mirror (444). Accordingly, among the wavelengths {2, ..., N} transmitted and provided through the first spectrum control unit (452), only some wavelengths {2} are reflected by the second dichroic filter (413) and provided to the second modulation unit (423), and the remaining wavelengths {3, ..., N} are transmitted.

[0149] At this time, the partial wavelength {2} reflected from the second dichroic filter (413) passes through the second modulation unit (423), the transmission modulator, and after the light quantity is controlled, is provided to the third dichroic filter (433). In addition, as described above, light of a specific wavelength {1}, the light quantity of which is controlled, is provided from the first spectrum control unit (453) to the third dichroic filter (433), and the third dichroic filter (433) ultimately combines the wavelengths {1, 2} and provides them to the second mirror (443).

[0150] Thus, the light in which the wavelengths {1, 2} are combined is provided with its direction changed through the second mirror (443) and is provided as the output light (130), or further combined with light provided from additional spectrum units and provided as the output light (130).

[0151] Likewise, if the Nth spectrum unit (454) is provided, N wavelengths {1, 2, ..., N}, each of which has its light quantity adjusted, can be combined and provided as the output light (130) through the Nth mirror (444).

[0152] At this time, the output light control unit (600) outputs the output light (130), which is the final reshaped light, through the output lens (630).

[0153] At this time, the output light (130) is white light as described above, and is light that includes a predetermined wavelength or has the intensity of a specific wavelength varied by the spectrum control unit (402).

[0154] As described above, in the lighting device (102) according to the present embodiment, through the spectrum control unit (402), light having different spectra, such as the first to third lights (11, 12, 13), is provided as the output light (130), as described with reference to the preceding FIG. 1.

[0155] Fig. 8 is a cross-sectional view illustrating a lighting device according to another embodiment of the present invention.

[0156] The lighting device (103) according to the present embodiment, unlike the lighting devices (100, 101, 102) described above, includes a light-emitting unit such as a light-emitting diode, provides output light as white light, and has a different configuration except that it is light that includes a predetermined wavelength or has a light whose intensity of a specific wavelength is selectively variable.

[0157] Referring to FIG. 8, the lighting device (103) according to the present embodiment includes a base substrate (710), a spectrum control unit (720), a guide reflection unit (750), a reflection plate (751), a protective layer (760), a diffusion layer (770), and a lens unit (780).

[0158] The above base substrate (710) forms the base of the lighting device (103), and the spectrum control unit (720) is formed on the base substrate (710).

[0159] The above spectrum control unit (720) emits light with a variable spectrum and includes a driving unit (730) and a light source unit (740). The driving unit (730) is formed on the base substrate (710), and the light source unit (740) is mounted on the driving unit (730).

[0160] The light source unit (740) includes a plurality of light emitting units, which include a plurality of light emitting diodes (LEDs) (741, 742, 743, 744). In the present embodiment, each of the light emitting diodes (741, 742, 743, 744) emits light of a different wavelength. At this time, the wavelength emitted by each of the light emitting diodes may be light of a wavelength included in visible light, and may belong to a specific wavelength band in a wavelength band divided into N, as described with reference to FIG. 4.

[0161] Meanwhile, although the light emitting unit is described as an example of a light emitting diode, the light emitting unit is not limited thereto. That is, the light emitting diode may be replaced with, for example, an organic light emitting diode (OLED), quantum dot electroluminescence (QD-EL), etc. However, for the convenience of explanation, the following description will exemplify the application of a light emitting diode as the light emitting unit.

[0162] The above driving unit (730) not only controls the driving of each of the light emitting diodes (741, 742, 743, 744), but also controls the intensity of light generated from each of the light emitting diodes (741, 742, 743, 744). Thus, through the driving unit (730), whether each of the light emitting diodes emits light and the intensity of light emission when driven are controlled.

[0163] Thus, the light provided upward through the spectrum control unit (720) is light containing a predetermined wavelength or light with a variable intensity of a specific wavelength, similar to the spectrum control units (400, 401, 402) described above.

[0164] The above guide reflection unit (750) and the reflection plate (751) are respectively provided on the side and bottom of the light source unit (740) to guide or reflect the light provided from the light source unit (740) so that it proceeds in an upward direction.

[0165] The above protective layer (760) protects the light source unit (740) from above the light source unit (740), and the diffusion layer (770) scatters or transmits the light provided upward from the light source unit (740) to homogeneously mix it.

[0166] That is, the spectrum provided upward through the light source unit (740) is selectively controlled light, light containing a predetermined wavelength, or light with a variable intensity of a specific wavelength, passes through the diffusion layer (770), is homogeneously mixed, and is ultimately provided upward as white light (131).

[0167] At this time, the lens part (780) is provided in a predetermined shape on the upper part of the diffusion layer (770) to control the white light (131) to proceed in a desired direction.

[0168] As described above, in the lighting device (103) according to the present embodiment, through the spectrum control unit (720), light having different spectra, such as the first to third lights (11, 12, 13), is provided as the output light (131), as described with reference to the preceding FIG. 1.

[0169] Furthermore, in this embodiment, it was explained that each of the light-emitting diodes emits light of a different wavelength, a specific light-emitting diode emits light of a specific wavelength, and whether or not each light-emitting diode emits light and the intensity of the light emission are controlled by the driving unit.

[0170] Alternatively, although not shown, each of the light emitting diodes may selectively emit light of different wavelengths. That is, a specific light emitting diode may selectively emit light of different wavelengths under the control of the driving unit, thereby allowing light of different wavelengths to be selected and provided from a specific light emitting diode. Furthermore, the intensity of light emitted from each of the light emitting diodes may also be controlled by the driving unit.

[0171] As a result, each of the light-emitting diodes can selectively provide light of a specific wavelength at a specific intensity, thereby ultimately providing light having different spectra as the output light.

[0172] As described above, in the case of a light-emitting diode with a fixed wavelength, there is a problem that the output efficiency decreases inversely proportional to the number of emission wavelengths. However, if a light-emitting diode with variable wavelength and intensity is used as described above, the problem of decreased output efficiency can be practically solved.

[0173] Fig. 9 is a cross-sectional view illustrating a lighting device according to another embodiment of the present invention.

[0174] Referring to FIG. 9, the lighting device (104) according to the present embodiment includes a base substrate (810), a spectrum control unit (820), a diffusion layer (860), and a lens unit (870).

[0175] The above base substrate (810) forms the base of the lighting device (104), and the spectrum control unit (820) is formed on the base substrate (810).

[0176] The above spectrum control unit (820) emits light with a variable spectrum and includes a driving unit (830), a light source unit (840), and a panel unit (850). The driving unit (830) is formed on the base substrate (810), and the light source unit (840) is mounted on the driving unit (830).

[0177] The light source unit (840) includes a plurality of light emitting diodes (LEDs), and in the present embodiment, each of the light emitting diodes emits light of a different wavelength. At this time, the wavelength emitted by each of the light emitting diodes may be light of a wavelength included in visible light, and as described with reference to FIG. 4, may belong to a specific wavelength band among a wavelength band divided into N.

[0178] The above driving unit (830) controls the driving of each of the light-emitting diodes, and controls the ON / OFF of each of the light-emitting diodes to selectively provide light of a specific wavelength band in an upward direction. That is, the driving unit (830) in the present embodiment is different from the one that controls the intensity of light emitted by the driving unit (730) in FIG. 8.

[0179] Accordingly, in the present embodiment, the panel unit (850) is additionally provided on the upper portion of the light source unit (840) to control the transmission rate of light provided upward for each pixel. At this time, the panel unit (850) may be, for example, a liquid crystal panel, and the transmission rate of light provided upward can be controlled through the transmission rate control for each pixel of the liquid crystal panel.

[0180] Ultimately, in the present embodiment, each of the light emitting units included in the light source unit (840) is selectively driven to emit light, and the transmission rate of the emitted light is controlled by the panel unit (850). Thus, the light provided upward through the spectrum control unit (820) is spectrum-controlled light, which may be light containing a predetermined wavelength or light with a variable intensity of a specific wavelength.

[0181] Furthermore, the diffusion layer (860) scatters or transmits the light provided upward from the spectrum control unit (820) to homogeneously mix it. That is, the light provided upward through the spectrum control unit (820) is light whose spectrum is selectively controlled, such as light containing a predetermined wavelength or light with a variable intensity of a specific wavelength, passes through the diffusion layer (860), is homogeneously mixed, and is ultimately provided upward as white light (131).

[0182] At this time, the lens part (870) is provided in a predetermined shape on the upper part of the diffusion layer (860) to control the white light (131) to proceed in a desired direction.

[0183] As described above, in the lighting device (104) according to the present embodiment, as described with reference to FIG. 1 above, through the spectrum control unit (820), light having different spectra, such as the first to third lights (11, 12, 13), is provided as the output light (131). At this time, the light having different spectra means, as already repeatedly described, light composed of different wavelengths, or light composed of the same wavelengths but with different intensities for each wavelength.

[0184] That is, in the present embodiment, light composed of different wavelengths is implemented through driving the driving unit (830), and light composed of different wavelength intensities is implemented through driving the panel unit (850).

[0185] Fig. 10 is a cross-sectional view illustrating a lighting device according to another embodiment of the present invention.

[0186] Referring to FIG. 10, the lighting device (105) according to the present embodiment includes a base substrate (910), a spectrum control unit (920), a diffusion layer (970), and a lens unit (980).

[0187] The above base substrate (910) forms the base of the lighting device (105), and the spectrum control unit (920) is formed on the base substrate (910).

[0188] The above spectrum control unit (920) emits light with a variable spectrum and includes a driving unit (930), a light source unit (940), a panel unit (950), and a color filter (960). The driving unit (930) is formed on the base substrate (910), and the light source unit (940) is mounted on the driving unit (930).

[0189] The light source unit (940) includes a plurality of light emitting diodes (LEDs), and in the present embodiment, each of the light emitting diodes emits light that includes all wavelengths in the visible light range. For example, each of the light emitting diodes may emit white light, but is not necessarily limited to white light, and it is sufficient if all of the light emitting diodes equally emit light that includes all wavelengths in the visible light range. In this case, the light emitted by each of the light emitting diodes, as described with reference to FIG. 4, includes all wavelength bands divided into N, and all of the light emits the same light.

[0190] The above driving unit (930) controls the driving of each of the light emitting diodes, controls the ON / OFF of each of the light emitting diodes, and causes each light emitting diode to emit the light described above.

[0191] Meanwhile, in the present embodiment, the panel portion (950) and the color filter (960) are additionally provided on the upper portion of the light source unit (940), thereby varying the transmission rate of light provided upward for each pixel and the wavelength of light.

[0192] That is, the panel portion (950) may be, for example, a liquid crystal panel, and the transmission rate of light provided upward may be controlled by controlling the transmission rate of each pixel of the liquid crystal panel. However, since the light passing through the panel portion (950) is light (e.g., white light) emitted from each light-emitting diode and contains the same wavelength, only the intensity of light containing the same wavelength is controlled for each pixel of the panel portion (950).

[0193] Accordingly, the color filter (960) transmits different wavelengths of light to each pixel with respect to the light intensity being controlled. Thus, light transmitted through the color filter (960) and provided upward can be selected as light of a specific wavelength.

[0194] Ultimately, in the case of the present embodiment, each of the light emitting diodes included in the light source unit (940) is driven to emit light simultaneously and equally upwards, including light covering all visible light wavelength bands, and the transmission rate of the light emitted by each light emitting diode is controlled by the panel unit (950). In addition, the wavelength of the light emitted by each light emitting diode is varied through the color filter (960) to provide light of a specific wavelength.

[0195] Accordingly, the light provided upward through the color filter (960) is light with a controlled spectrum, and may be light containing a predetermined wavelength, or light containing the same wavelength but with a variable intensity of a specific wavelength.

[0196] That is, in order to provide light of a specific wavelength by selecting and combining it, only the panel portion aligned with the color filter corresponding to the selected wavelength should form a transmission rate of 100%, and the panel portions aligned with the color filters corresponding to other wavelengths should form a transmission rate of 0%. In contrast, even when a specific wavelength is selected, by adjusting the transmission rates of the panel portions aligned with the corresponding color filters differently, light can be implemented so that it includes the same wavelength but the intensity of the specific wavelength is variable.

[0197] Furthermore, the diffusion layer (970) scatters or transmits the light provided upward from the spectrum control unit (920) to homogeneously mix it. That is, the light provided upward through the spectrum control unit (920) is light whose spectrum is selectively controlled, such as light containing a predetermined wavelength or light with a variable intensity of a specific wavelength, passes through the diffusion layer (970), is homogeneously mixed, and is ultimately provided upward as white light (131).

[0198] At this time, the lens part (980) is provided in a predetermined shape on the upper part of the diffusion layer (970) to control the white light (131) to proceed in a desired direction.

[0199] As described above, in the lighting device (105) according to the present embodiment, light having different spectra, such as the first to third lights (11, 12, 13), is provided as the output light (131) through the spectrum control unit (920), as described with reference to the preceding FIG. 1. In this case, light having different spectra means light composed of different wavelengths, or light composed of the same wavelengths but with different intensities for each wavelength.

[0200] That is, in the present embodiment, light composed of different wavelengths is selected through the color filter (960), and light composed of different wavelength intensities is implemented through driving the panel unit (950).

[0201] Fig. 11 is a cross-sectional view showing a lighting device according to another embodiment of the present invention.

[0202] Referring to FIG. 11, the lighting device (105) according to the present embodiment includes a spectrum control unit (1010), a diffusion layer (1050), and a lens unit (1060).

[0203] The above spectrum control unit (1010) emits light with a variable spectrum and includes a light source unit (1020), a guide panel (1030), and a control panel (1040).

[0204] The light source unit (1020) is arranged on the side of the guide panel (1030) and includes a light emitting diode (LED) (1021). In this embodiment, the light emitting diode emits light including all wavelengths in the visible light range. That is, as described with reference to FIG. 10, the light emitting diode may emit white light, but is not necessarily limited to white light. It is sufficient if it emits light including all wavelengths in the visible light range. Furthermore, although not illustrated, the light emitting diode (1021) may be replaced with a light source that emits light including all wavelengths in the visible light range.

[0205] The above guide panel (1030) converts light provided from the light source unit (1020) provided from the side toward the upper direction, and includes a reflector (1031), a guide portion (1033), and a reflective array (1032).

[0206] That is, light including all visible light wavelength ranges provided from the side of the guide portion (1033) is guided by the guide portion (1033) and provided upward, and light provided downward from the guide portion (1033) is reflected through the reflector (1031) and the reflective array (1032) and provided upward.

[0207] Thus, the light provided from the light source unit (1020) is guided upward through the guide panel (1030) and provided to the control panel (1040).

[0208] The above control panel (1040) is placed on the upper part of the guide panel (1030) and includes a substrate portion (1041), a panel portion (1042), and a color filter (1043).

[0209] The above substrate portion (1041) provides light that is guided upward through the guide panel (1030) to the upper panel portion (1042). The panel portion (1042) and the color filter (1043) perform substantially the same role as the panel portion (950) and the color filter (960) described with reference to FIG. 10.

[0210] That is, in this embodiment as well, the light including all visible light wavelength ranges provided to the panel portion (1042) is substantially the same as the light provided to the panel portion (950) in FIG. 10.

[0211] Accordingly, in this embodiment, the panel portion (1042) and the color filter (1043) vary the transmission rate of light provided upward for each pixel and the wavelength of light.

[0212] That is, the panel portion (1042) may be, for example, a liquid crystal panel, and the transmission rate of light provided in the upper direction may be controlled by controlling the transmission rate of each pixel of the liquid crystal panel. However, since all light passing through the panel portion (1042) is light (e.g., white light) containing the same wavelength, only the intensity of light containing the same wavelength is controlled for each pixel of the panel portion (1042).

[0213] Accordingly, the color filter (1043) controls the intensity of light for each pixel as it passes through the panel portion (1042), and varies the wavelength of the light provided to each pixel in a different band. Thus, the light provided upward by passing through the color filter (1043) can be provided as light having a specific wavelength for each pixel.

[0214] Ultimately, in the present embodiment, for light including all visible light wavelength bands provided from the light source unit (1020), the light transmission rate of each pixel is controlled by the panel unit (1042). In addition, the wavelength of light transmitted to each pixel is varied through the color filter (1043) to provide light of a specific wavelength.

[0215] Accordingly, the light provided upward through the color filter (1043) is light with a controlled spectrum, and may be light containing a predetermined wavelength, or light containing the same wavelength but with a variable intensity of a specific wavelength.

[0216] Furthermore, the diffusion layer (1050) scatters or transmits the light provided upward from the spectrum control unit (1010) to homogeneously mix it. That is, light provided through the spectrum control unit (1010) with a selectively controlled spectrum, such as light containing a predetermined wavelength or light with a variable intensity of a specific wavelength, passes through the diffusion layer (1050) and is homogeneously mixed to ultimately be provided upward as white light (131).

[0217] At this time, the lens part (1060) is provided in a predetermined shape on the upper part of the diffusion layer (1050) to control the white light (131) to proceed in a desired direction.

[0218] As described above, in the lighting device (106) according to the present embodiment, through the spectrum control unit (1010), light having different spectra, such as the first to third lights (11, 12, 13), is provided as the output light (131), as described with reference to the preceding FIG. 1.

[0219] That is, in the present embodiment, light composed of different wavelengths is selected through the color filter (1043), and light composed of different wavelength intensities is implemented through driving the panel unit (1042).

[0220] Figures 12 and 13 are cross-sectional views illustrating various examples of the object of Figure 1.

[0221] As previously described, the object may have a special structure to enable it to express a wider range of colors depending on the light provided, and may have a predetermined layered structure as exemplified through FIGS. 12 and 13.

[0222] First, referring to FIG. 12, the object (201) is formed with a structure in which a plurality of structural layers (1110, 1120, 1130, 1140) are laminated on a base substrate (1100), so that the spectrum of reflected light reflected from the object (201) can be controlled in various ways.

[0223] At this time, by designing the number of layers to be laminated in the above structural layers (1110, 1120, 1130, 1140), the material of each layer, the refractive index of each structural layer, the thickness of each structural layer, etc. to be varied, when light of a specific spectrum is incident, the reflection spectrum reflected in response to it can be varied.

[0224] For example, the above structural layers (1110, 1120, 1130, 1140) are formed by stacking nano-thin film layers having different refractive indices, so that the reflectivity can be controlled according to the wavelength band of light provided to the object (201). At this time, the stacked nano-thin film layers can have different thicknesses. Thus, different colors can be displayed externally depending on the wavelength of the light provided.

[0225] In contrast, the above structural layers (1110, 1120, 1130, 1140) may be formed by stacking so-called bandpass Bragg reflectors that reflect only a specific wavelength band and transmit the rest. Thus, different colors can be displayed externally depending on the wavelength of the light provided.

[0226] Alternatively, the structural layers (1110, 1120, 1130, 1140) may be configured such that each structural layer includes particles that scatter different wavelengths. Thus, the stacked structural layers may similarly have different reflectivities depending on the wavelength band of the incident light.

[0227] Alternatively, the structural layers (1110, 1120, 1130, 1140) may be configured such that each structural layer has a metasurface having a different refractive index, thereby having different reflectivities depending on the wavelength band of the incident light.

[0228] Meanwhile, referring to FIG. 13, the object (202) may have a structure in which a reflector (1210) is laminated on a base substrate (1200) and nanoparticles (1240) are dispersed on top of the reflector (1210).

[0229] That is, the nanoparticles (1240) may be uniformly or non-uniformly dispersed and positioned on a predetermined dispersion medium (1230). At this time, the nanoparticles (1240) may be particles of the same type or particles of different types, each of which scatters incident light in a different way. Furthermore, the nanoparticles (1240) may be replaced with various particles, such as core-shell particles.

[0230] Accordingly, in the object (202) according to the present embodiment, as the light incident through the nanoparticles (1240) is scattered in various ways, the object has different reflectivity depending on the wavelength of the light provided, and different colors can be displayed externally.

[0231] According to the embodiments of the present invention as described above, in an environment where the same white light is provided externally, the display color of an object can be varied in various ways depending on the provided light, so that active control of the color of the object is possible, and the object can be viewed in various colors.

[0232] That is, by appropriately changing the spectral distribution of light, the color change can be intentionally and purposefully varied so that the user can express the color he or she wants. Specifically, by utilizing the so-called metamerism, in which there are countless visible light spectrums that can display the same white light, the surroundings other than the object maintain the same white light, and only the object can implement variable visibility in various colors. Since the color of the object can be varied by controlling external light without changing the material, element, or characteristics of the object itself, active control of the color of the object can be implemented more easily.

[0233] Meanwhile, as a lighting device providing white light with the above-described various spectra, it is possible to provide light that selectively provides light only for a specific wavelength using a diffraction grating, a prism, or a multi-wavelength dispersion device and a modulator, thereby providing light that displays white light to the outside while having a various spectra, thereby enabling active control of the color of the object.

[0234] In addition, as the above lighting device, white light having a variety of spectra can be provided through selective reflection and superposition of specific wavelengths using a dichroic filter and a modulator.

[0235] In addition, as the lighting device, white light having various spectrums can be provided by arranging light emitting units that emit light of various wavelengths, selectively controlling the light emitting state of each light emitting unit, or selectively transmitting light emitted through each light emitting unit.

[0236] In addition, as the lighting device, white light having various spectra can be provided by applying a light emitting unit that emits white light and providing a panel portion or color filter that varies the transmission rate for each wavelength.

[0237] Furthermore, since color changes according to the spectrum may be limited in the case of a pre-fabricated object, by fabricating the object into a structure in which structural layers are laminated, a more diverse range of colors that can be selected by the user can be implemented, thereby diversifying spatial colorization. In this case, the structural layers can be fabricated to include any one of a nano-thin film layer, a layer in which homogeneous or heterogeneous nanoparticles are dispersed, and a layer having a metasurface, thereby ensuring design diversity and flexibility.

[0238] Although the present invention has been described above with reference to preferred embodiments thereof, it will be understood by those skilled in the art that various modifications and changes may be made to the present invention without departing from the spirit and scope of the present invention as set forth in the claims below.

Claims

1. A lighting device that provides white light as output light and actively controls the color of an object displayed externally by the output light. A light source that generates input light containing wavelengths in the visible light range; A spectrum control unit that receives the input light, divides it into wavelengths, and independently controls the transmission rate for each wavelength to selectively provide light with a controlled spectrum; and A lighting device including an output light control unit that collects light selectively provided from the above spectrum control unit and provides the output light, which is white light.

2. In paragraph 1, A lighting device further comprising an input light control unit interposed between the light source and the spectrum control unit, the input light being filtered to transmit only visible light.

3. In the first paragraph, the spectrum control unit, A dispersion unit that provides dispersed light by dispersing the input light by wavelength; and A lighting device characterized by including a modulation unit that independently controls the transmission rate for each wavelength of the above-mentioned dispersed light.

4. In the third paragraph, the modulation unit, A lighting device characterized in that the color of the object is varied while the output light is maintained as white light by independently controlling the transmission rate of each wavelength of the dispersed light.

5. In the third paragraph, the distribution unit, A lighting device characterized by being a diffraction grating, prism or multi-wavelength dispersing device.

6. In paragraph 1, The above spectrum control unit includes a plurality of spectrum control units, Each of the above spectrum control units, A dichroic filter that selectively reflects the input light by wavelength to provide reflected light; and A lighting device characterized by including a modulation unit that provides modulated light by controlling the amount of reflected light.

7. In paragraph 6, A lighting device characterized in that the modulated light provided from each of the above spectrum control units is selectively combined with the modulated light provided from other spectrum control units to change the color of the object while maintaining the output light as white light.

8. In paragraph 1, The above spectrum-controlled light is light with the same wavelength but with different spectra controlled. A lighting device characterized in that the color of an object displayed externally is intentionally controlled by intentionally providing light whose spectrum is controlled differently from each other.

9. In a lighting device that provides white light as output light and actively controls the color of an object displayed externally by the output light, A lighting device that emits light including a wavelength in the visible light range and includes a spectrum control unit that independently controls the luminance of each wavelength of the emitted light to selectively provide light with a controlled spectrum.

10. In paragraph 9, The above spectrum control unit includes a plurality of light emitting units, A lighting device characterized in that each of the above light-emitting units selectively emits light of different wavelengths or emits light of specific wavelengths at different intensities.

11. In the 10th paragraph, each of the light emitting units, A lighting device characterized by any one of a light emitting diode (LED), an organic light emitting diode (OLED), and a quantum dot electroluminescence (QD-EL) device.

12. In the 9th paragraph, the spectrum control unit, A light source unit including a plurality of light emitting units that emit light of different wavelengths; and A lighting device characterized by including a driving unit that controls whether each of the above light-emitting units emits light and the light-emitting intensity.

13. In the 9th paragraph, the spectrum control unit, A light source unit including a plurality of light emitting units that emit light of different wavelengths; and A lighting device characterized by including a panel portion positioned above the light source unit and individually controlling the transmission rate of light emitted from the light emitting units.

14. In the 9th paragraph, the spectrum control unit, A light source unit including a plurality of light emitting units, each of which emits light including all wavelengths in the visible light range; A panel portion positioned above the light source unit to individually control the transmission rate of light emitted from the light-emitting units; and A lighting device characterized by including a color filter positioned on the upper portion of the panel portion and selectively transmitting light of different wavelength bands.

15. In the 9th paragraph, the spectrum control unit, A light source unit that emits light containing all wavelengths in the visible light range; A guide panel that changes the direction of light of the above light source unit upward; and A lighting device characterized by including a control panel positioned on the upper portion of the guide panel, individually controlling the transmission rate of the light and selectively transmitting light of different wavelength bands.

16. Lighting device of paragraph 1; and An object that reflects output lights having different spectra provided from the above lighting device and is displayed externally in different colors, A spatial colorization system characterized in that the output light not reflected from the object is displayed as white light.

17. In paragraph 16, the object, A base substrate, and at least one structural layer laminated on the base substrate, A spatial colorization system characterized in that the above structural layer comprises any one of a nano-thin film layer, a layer in which homogeneous or heterogeneous nanoparticles are dispersed, and a layer having a metasurface.

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