Light-emitting device

Abstract

According to one aspect of the present invention, a light-emitting device may be provided, the light-emitting device comprising: a plurality of light-emitting elements for generating light; a controller having calibration information stored in advance so that the luminous intensity of the light generated from the plurality of light-emitting elements is corrected, and supplying a current to the plurality of light-emitting elements on the basis of the calibration information; and a substrate for supporting the controller and the plurality of light-emitting elements, wherein the controller is spaced apart from the plurality of light-emitting elements on the substrate.

Description

light-emitting device

[0001] The present invention relates to a light-emitting device.

[0002] Light-emitting diodes (LEDs) have been widely used recently. LEDs utilize the properties of compound semiconductors to convert electrical signals into forms of light such as infrared, visible light, and ultraviolet light.

[0003] As the light efficiency of light-emitting diodes increases, multiple light-emitting diodes are being applied in various fields, including display devices, lighting fixtures, and automotive lamps.

[0004] Embodiments of the present invention aim to provide a light-emitting device capable of adjusting the light intensity of a plurality of light-emitting elements.

[0005] Embodiments of the present invention aim to provide a light-emitting device comprising a plurality of light-emitting elements that generate light having the same luminous intensity, brightness, and color tone.

[0006] According to one aspect of the present invention, a light-emitting device may be provided, comprising: a plurality of light-emitting elements that generate light; a controller that supplies current to the plurality of light-emitting elements based on the calibration information, wherein calibration information is stored in advance to correct the light intensity of the light generated from the plurality of light-emitting elements; and a substrate that supports the controller and the plurality of light-emitting elements, wherein the controller is spaced apart from the plurality of light-emitting elements on the substrate.

[0007] Additionally, the above controller may be provided with a light-emitting device comprising: a memory in which the calibration information is stored; and a device control device that reads the calibration information stored in the memory and controls the plurality of light-emitting elements.

[0008] In addition, a light-emitting device may be provided in which the controller and the plurality of light-emitting elements are arranged in one direction on the substrate.

[0009] In addition, a light-emitting device may be provided, wherein the calibration information includes information regarding a plurality of current amounts supplied to each of the plurality of light-emitting elements.

[0010] In addition, a light-emitting device may be provided in which the multiple current amounts included in the calibration information are different.

[0011] In addition, a light-emitting device may be provided in which the calibration information includes information regarding the magnitude of the current supplied to each of the plurality of light-emitting elements.

[0012] In addition, a light-emitting device may be provided in which the magnitudes of multiple currents included in the calibration information are different.

[0013] In addition, a light-emitting device may be provided in which the calibration information includes information regarding the width of the current pulse supplied to each of the plurality of light-emitting elements.

[0014] In addition, a light-emitting device may be provided in which the widths of the plurality of current pulses included in the calibration information are different.

[0015] In addition, the plurality of light-emitting elements may be provided with a light-emitting device that generates different light intensities when the same amount of current is supplied to the plurality of light-emitting elements.

[0016] Additionally, a light-emitting device may be provided, comprising: a plurality of light-emitting elements that generate light; and a memory storing calibration information for controlling the light intensity of the light generated from the plurality of light-emitting elements, wherein the number of memory units is less than the number of the plurality of light-emitting elements.

[0017] In addition, a light-emitting device may be provided that further includes a device control device that reads calibration information stored in the memory and controls the plurality of light-emitting elements, wherein the distance between the device control device and the memory is shorter than the distance between the memory and the light-emitting elements.

[0018] Additionally, a light-emitting device may be provided in which the plurality of light-emitting elements are spaced apart from each other in one direction, and the distance between the memory and the light-emitting element closest to the memory among the light-emitting elements is shorter than the distance between the plurality of light-emitting elements.

[0019] Additionally, a light-emitting device may be provided, comprising: a plurality of first light-emitting elements that generate light; a plurality of second light-emitting elements that generate light of a peak wavelength different from that of the plurality of first light-emitting elements; a first controller that supplies current to the plurality of light-emitting elements based on the first calibration information, wherein first calibration information is stored in advance to correct the light intensity of the light generated from the plurality of first light-emitting elements; a second controller that supplies current to the plurality of second light-emitting elements based on the second calibration information, wherein second calibration information is stored in advance to correct the light intensity of the light generated from the plurality of second light-emitting elements; a first substrate that supports the plurality of first light-emitting elements and the first controller; and a second substrate that supports the plurality of second light-emitting elements and the second controller.

[0020] Additionally, a light-emitting device may be provided in which the plurality of first light-emitting devices are arranged in one direction on the first substrate, the plurality of second light-emitting devices are arranged in one direction on the second substrate, and the second substrate and the first substrate are spaced apart from each other in one direction.

[0021] Additionally, a light-emitting device may be provided, further comprising: a first communication device supported on the first substrate and communicating with the first controller; and a second communication device supported on the second substrate and communicating with the second controller and the first communication device.

[0022] In addition, the first communication device may be provided with a light-emitting device that receives information transmitted from the outside and transmits it to the first controller or to the second communication device.

[0023] Additionally, a light-emitting device may be provided in which the distance between the first controller and the second controller is greater than the distance between the first light-emitting element among the plurality of first light-emitting elements that is closest to the second substrate and the second light-emitting element among the plurality of second light-emitting elements that is closest to the first substrate.

[0024] Additionally, the second controller may be provided with a light-emitting device disposed between the first light-emitting element among the plurality of first light-emitting elements that is closest to the second substrate and the second light-emitting element among the plurality of second light-emitting elements that is closest to the first substrate.

[0025] In addition, a light-emitting device may be provided in which the light intensity of the light generated from the plurality of first light-emitting elements and the plurality of second light-emitting elements is the same by the first controller and the second controller.

[0026] One embodiment of the present invention has the effect that the light intensity, brightness, and color of a plurality of light-emitting elements can be formed identically.

[0027] In addition, one embodiment of the present invention has the effect of improving the color brightness and color reproduction rate of a plurality of light-emitting elements by means of a controller, and providing a high-quality light-emitting device.

[0028] In addition, since one embodiment of the present invention includes a memory in the controller, the size of the light-emitting device can be formed small, and there is an effect of being able to generate light of an appropriate amount suitable for the purpose.

[0029] FIG. 1 is a drawing showing a light-emitting device according to a first embodiment of the present invention.

[0030] Figure 2 is a block diagram of the light-emitting device of Figure 1.

[0031] FIG. 3 is a diagram showing that the width of a pulse supplied to one of the plurality of light-emitting elements of FIG. 1 is smaller than the width of a pulse supplied to another of the plurality of light-emitting elements.

[0032] FIG. 4 is a flowchart of a method for performing calibration of a light-emitting device according to a first embodiment of the present invention.

[0033] FIG. 5 is a drawing showing a light-emitting device according to a second embodiment of the present invention.

[0034] In the following description, numerous specific details are described for the purpose of explanation and to provide a complete understanding of the various embodiments or implementations of the present disclosure. As used herein, “Embodiments” and “Implementations” are interchangeable terms indicating non-limiting examples of devices or methods utilizing one or more of the concepts of the invention disclosed herein. However, it will be apparent that various embodiments may be implemented without utilizing these specific details or by utilizing one or more equivalent arrangements. In other examples, known structures and devices are illustrated in block diagram form to avoid unnecessarily obscuring the various embodiments. Furthermore, while various embodiments may differ from one another, they do not need to be exclusive. For example, specific shapes, configurations, and characteristics of an embodiment may be used or implemented in other embodiments without departing from the scope of the concept of the invention.

[0035] Unless otherwise specified, the illustrated embodiments should be understood as providing exemplary features of varying details in some ways in which the concept of the present invention can actually be realized. Therefore, unless otherwise specified, features, components, modules, layers, membranes, panels, regions and / or modes of various embodiments (hereinafter referred to individually or collectively as “elements”) may be combined, separated, interchanged, and / or rearranged differently without departing from the scope of the concept of the present invention.

[0036] The use of cross-hatching and / or shading in the attached drawings is generally provided to clarify the boundaries between adjacent elements. As such, the presence or absence of cross-hatching or shading, unless otherwise specified, does not imply or indicate any preference or requirement regarding the specific material, material properties, dimensions, proportions, commonalities between the exemplified elements, or any other features, attributes, and characteristics of the elements. Additionally, in the attached drawings, the size and relative size of the elements may be exaggerated for clarity and / or illustrative purposes. When embodiments are implemented differently, specific process sequences may be performed differently from the described order. For example, two consecutively described processes may be performed substantially simultaneously or in an order opposite to the described order. Also, the same reference numerals indicate the same elements.

[0037] When an element such as a layer is referred to as being "on", "connected to," or "coupled to" another element or layer, said element may be directly on, connected to, or coupled to the other element or layer, or an interposed element or layer may exist. However, when an element or layer is referred to as being "directly on", "directly connected to," or "directly coupled to" another element or layer, no interposed element or layer exists. To this end, the term "connected" may refer to a physical, electrical, and / or fluid connection with or without an interposed element. Furthermore, the DR1-axis, DR2-axis, and DR3-axis are not limited to the three axes of an orthogonal coordinate system, such as the x, y, and z axes, and may be interpreted in a broader sense. For example, the DR1-axis, DR2-axis, and DR3-axis may be perpendicular to each other, or they may represent different directions that are not perpendicular to each other. For the purposes of this disclosure, “one or more of X, Y, and Z” and “one or more selected from the group consisting of X, Y, and Z” may be interpreted as only X, only Y, only Z, or any combination of two or more of X, Y, and Z, such as, for example, XYZ, XYY, YZ, and ZZ. As used herein, the term “and / or” includes any and all combinations of one or more of the associated listed articles.

[0038] Although terms such as “first,” “second,” etc., may be used herein to describe various forms of elements, these elements shall not be limited by these terms. These terms are used to distinguish one element from another. Therefore, the first element discussed below may be named the second element without departing from the teachings of the present disclosure.

[0039] Spatially relative terms such as “below,” “under,” “immediately below,” “lower,” “above,” “upper,” “upper,” “higher,” and “side” (e.g., as in “side wall”) may be used for descriptive purposes and thereby to describe the relationship between one element and another element(s) as illustrated in the drawings. Spatially relative terms are intended to include different orientations of the device in use, operation, and / or manufacture in addition to the orientations illustrated in the drawings. For example, if the device in the drawings is inverted, the element described as “below” or “under” another element or feature will be oriented “above” the other element or feature. Therefore, the exemplary term “below” may include both upper and lower orientations. Additionally, the device may be oriented differently (e.g., rotated 90° or oriented in a different orientation), and thus, spatially relative descriptors used herein may also be interpreted accordingly.

[0040] The technical terms used in this specification are intended to describe specific embodiments and are not limiting. The singular form used in this specification also includes the plural form unless the context clearly indicates otherwise. Additionally, the terms “comprising,” “comprising,” “comprising,” and / or “comprising” used in this specification specify the presence of the mentioned features, integers, steps, operations, elements, components, and / or groups thereof, but do not exclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and / or groups thereof. Furthermore, the terms “substantially,” “about,” and other similar terms used in this specification are used to indicate approximation rather than degree, and are used to describe inherent deviations of measured, calculated, and / or provided values ​​that may be recognized by a person of ordinary knowledge in the art.

[0041] Various embodiments are described below with reference to cross-sectional and / or exploded drawings, which are schematic examples of idealized embodiments and / or intermediate structures. As such, variations from the shapes in the drawings may be expected, for example, as a result of manufacturing techniques and / or tolerances. Therefore, the embodiments disclosed herein should not be interpreted as being limited to the shapes of specific illustrated regions, but should be interpreted to include, for example, deviations in shape resulting from manufacturing. In this way, the regions illustrated in the drawings may be schematic in nature, and the shapes of these regions may not reflect the actual shapes of the regions of the device, and thus are not intended to have a limiting meaning.

[0042] As is customary in the art, some embodiments may be illustrated and described in the accompanying drawings in terms of functional blocks, units, and / or modules. Those skilled in the art will understand that these blocks, units, and / or modules are physically implemented by electronic (or optical) circuits, such as logic circuits, discrete components, microprocessors, wiring circuits, memory elements, and wiring connections, formed using semiconductor-based manufacturing technology or other manufacturing technology. Where blocks, units, and / or modules are implemented by microprocessors or other similar hardware, they may be programmed and controlled using software (e.g., microcode) to perform the various functions discussed herein, and may optionally be driven by firmware and / or software. Additionally, each block, unit, and / or module may be implemented by dedicated hardware, or as a combination of dedicated hardware for performing some functions and a processor for performing other functions (e.g., one or more programmed processors and associated circuits). Additionally, each of the blocks, units, and / or modules of some embodiments may be physically separated into two or more interacting and individual blocks, units, and / or modules without departing from the scope of the concept of the present invention. Additionally, the blocks, units, and / or modules of some embodiments may be physically combined into more complex blocks, units, and / or modules without departing from the scope of the concept of the present invention.

[0043] Unless otherwise defined, all terms used herein (including technical or scientific terms) have the same meaning as commonly understood by those skilled in the art to which this disclosure pertains. Terms such as those defined in commonly used dictionaries should be interpreted as having a meaning consistent with that meaning in the context of the relevant technology, and should not be interpreted in an ideal or overly formal sense unless explicitly defined in this specification.

[0044] Hereinafter, a light emitting apparatus (1) according to the first embodiment of the present invention will be described.

[0045] Referring to FIG. 1, a light-emitting device (1) according to the first embodiment of the present invention can generate light. Additionally, the light-emitting device (1) can be mounted on a vehicle. Such a light-emitting device (1) may be included in a taillight, headlight, rear lamp, tail lamp, ambient lighting, interior light, etc. Additionally, the light-emitting device (1) mounted on the vehicle can emit light of a red spectrum, light of a yellow spectrum, or light of a white spectrum to display information such as a stop signal or text to the outside. Such a light-emitting device (1) may be a high-quality display device with distinct contrast and a distinct contrast ratio by reducing light interference between a plurality of light-emitting elements (100) and minimizing interference between driving areas. The light-emitting device (1) may include a light-emitting element (100), a controller (200), and a substrate (300).

[0046] A plurality of light-emitting elements (100) may be formed to generate light. A plurality of light-emitting elements (100) may generate light of at least one peak wavelength. Additionally, at least two of the plurality of light-emitting elements (100) may have different peak wavelengths. A plurality of light-emitting elements (100) may be arranged on a substrate (300) spaced apart from one another in one direction. A plurality of light-emitting elements (100) may be configured to generate light of different light intensities. Hereinafter, one of the plurality of light-emitting elements (100) is named the first sub-light-emitting element (100a), and another of the plurality of light-emitting elements (100) is named the second sub-light-emitting element (100b). Additionally, when the same amount of current is supplied to the first sub-luminescent element (100a) and the second sub-luminescent element (100b), the light from the first sub-luminescent element (100a) and the light from the second sub-luminescent element (100b) may have different luminosity, brightness, and color tones.

[0047] Meanwhile, one or more of the plurality of light-emitting elements (100) may include R, G, and B subpixels. The R, G, and B subpixels may each include a red subpixel (R), a green subpixel (G), and a blue subpixel (B). Additionally, when all of the subpixels R, G, and B of the light-emitting element (100) are active, the light-emitting element (100) may emit white light. Furthermore, calibration may be performed so that the color coordinates of the first light-emitting element, in which all of the R, G, and B subpixels among the plurality of light-emitting elements (100) are active to generate white light, and the color coordinates of the second light-emitting element, in which all of the R, G, and B subpixels are active to generate white light, are formed as the same value. The difference between the color coordinates of the light-emitting element that generates white light and the color coordinates of the light-emitting element in which all of the R, G, and B subpixels are turned off may be ±0.003 or less.

[0048] Referring further to FIGS. 2 and FIGS. 3, the controller (200) can control a plurality of light-emitting elements (100) based on pre-stored calibration information so that one or more of the light intensity, brightness, and color of light generated from a plurality of light-emitting elements (100) are formed identically or similarly. In other words, the controller (200) can supply current to each of the plurality of light-emitting elements (100) based on the calibration information to correct the light intensity of the plurality of light-emitting elements (100).

[0049] Calibration information may include device information regarding the luminous intensity, brightness, color coordinates, and color tone of each of the plurality of light-emitting elements (100). Additionally, calibration information may include information or logic data regarding the amount of current to be supplied to each of the plurality of light-emitting elements (100), the magnitude of the current, the width of the current pulse, the current supply time, etc.

[0050] For example, multiple current amounts included in the calibration information may differ from each other. Additionally, the magnitudes of multiple currents included in the calibration information may differ from each other. Additionally, the widths of multiple current pulses included in the calibration information may differ from each other. Furthermore, multiple current supply times included in the calibration information may differ from each other.

[0051] Calibration information can be formed in multiple ways corresponding to each of the multiple light-emitting elements (100). At least some of the multiple calibration information may be formed differently from one another. For example, the amount of current included in any one of the multiple calibration information may be different from the amount of current included in another of the multiple calibration information. Also, the magnitude of the multiple currents included in any one of the multiple calibration information may be different from the magnitude of the current included in another of the multiple calibration information. Additionally, the width of the current pulse included in any one of the multiple calibration information may be different from the width of the current pulse included in another of the multiple calibration information. Also, the current supply time included in any one of the multiple calibration information may be different from the current supply time included in another of the multiple calibration information.

[0052] Based on this calibration information, the controller (200) may have a current amount supplied to the first sub-light-emitting element (100a) that is less than the current amount supplied to the second sub-light-emitting element (100b). Additionally, the controller (200) may make the magnitude of the current supplied to the first sub-light-emitting element (100a) smaller than the magnitude of the current supplied to the first sub-light-emitting element (100a). Additionally, the controller (200) may make the supply time of the current supplied to the first sub-light-emitting element (100a) shorter than the supply time of the current supplied to the second sub-light-emitting element (100b). The controller (200) may make the width of the current pulse supplied to the first sub-light-emitting element (100a) smaller than the width of the current pulse supplied to the second sub-light-emitting element (100b).

[0053] Additionally, the controller (200) may include a device control device (210) and a memory (220).

[0054] The device control device (210) can control one or more of the current amount, current magnitude, current supply time, and current pulse width supplied to each of the plurality of light-emitting elements (100) based on one or more of the information stored in the memory (220) and calibration information. By this device control device (210), the light intensity, brightness, color coordinates, and color tone of the light of the plurality of light-emitting elements (100) can be formed identically or similarly. In addition, the number of device control devices (210) may be less than the number of light-emitting elements (100). The device control device (210) may include a data control device (211), a current application device (212), and a plurality of channels (213).

[0055] The data control device (211) can scan information in the memory (220) so that multiple light-emitting elements (100) are controlled simultaneously. In other words, the data control device (211) can read information corresponding to multiple light-emitting elements (100) in the memory (220), distribute it according to the number of multiple channels (213), and transmit it to the current application device (212). For example, the data control device (211) can distribute one or more of the calibration information and the correction values ​​to be described later to each of the multiple channels (213) and transmit them to the current application device (212).

[0056] The current application device (212) can control the current supplied to a plurality of light-emitting elements (100). Additionally, the current application device (212) can supply current to a plurality of channels (213). In other words, the current application device (212) can control the current supplied to the plurality of channels (213) based on information applied from the data control device (211). For example, the current application device (212) can control the current supplied to the plurality of channels (213) based on one or more of the plurality of calibration information and correction values.

[0057] Each of the plurality of channels (213) can be connected to each of the plurality of light-emitting elements (100) to supply current to the plurality of light-emitting elements (100). In other words, one of the plurality of channels (213) can be connected to the first sub-light-emitting element (100a), and another of the plurality of channels (213) can be connected to the second sub-light-emitting element (100b). Through these plurality of channels (213), the plurality of light-emitting elements (100) can receive current controlled by the current application device (212).

[0058] The memory (220) can store calibration information. The number of memory units (220) may be less than the number of multiple light-emitting elements (100). The memory (220) may be placed separately from the light-emitting elements (100). The distance between the memory (220) and the element control device (210) may be smaller than the distance between multiple light-emitting elements (100). Since the memory (220) and the element control device (210) are separated, the impact of the light-emitting elements (100) on the heat of the memory (220) is reduced, and reliability may be increased. Additionally, the distance between the memory (220) and the element control device (210) may be shorter than the distance between the light-emitting element (100) that is closest to the controller (200) among the multiple light-emitting elements (100). Through this, the influence of the light-emitting element (100) on the heat of the controller (200) can be reduced, and reliability can be increased. Additionally, since the distance between the light-emitting element (100) closest to the controller (200) among the plurality of light-emitting elements (100) and the memory (220) may be shorter than the distance between the plurality of light-emitting elements (100), signal interference occurring on the substrate (300) can be reduced. Additionally, the memory (220) can store the color coordinate values ​​of each of the plurality of light-emitting elements (100). Additionally, the memory (220) may include a correction value for correcting the color coordinates or luminance of each of the plurality of light-emitting elements (100). Additionally, the memory can store the color coordinates or luminance values ​​of the R, G, and B subpixels of each of the plurality of light-emitting elements (100). Additionally, the memory (220) may include a correction value for correcting the R, G, and B values ​​of each subpixel of a plurality of light-emitting elements (100). This can reduce the difficulty of the design.

[0059] The substrate (300) is formed to be long in one direction and can support a plurality of light-emitting elements (100) and a controller (200). The substrate (300) may be a substrate in which glass or paper is bonded to an alumina, quartz, calcium zirconate, forsterite, SiC, graphite, fused silica, mullite, cordierite, zirconia, beryllia, aluminum nitride, LTCC (low temperature co-fired ceramic), paper phenolic, or epoxy resin, or a wiring portion composed of metals and metal compounds such as Cu, Al, Ag, Au, Ni, W, etc. may be added on an insulating layer composed of PI (Polyimide), BT (Bismaleimide / Triazine), Teflon, PMMA, PC (Polycarbonate), etc. The substrate (300) may be a printed circuit board (PCB) including metal wiring. In addition, light-transmitting materials such as glass, quartz, PET film, PI, and polyamide may be used. Also, the substrate (300) may have restoring force or bending properties. Additionally, the substrate (300) may be formed to be elongated in one direction.

[0060] Hereinafter, a calibration method for performing calibration of a plurality of light-emitting elements (100) of a light-emitting device according to the first embodiment of the present invention will be described.

[0061] The calibration method may include an image acquisition step (S100), an image processing step (S200), a correction information generation step (S300), and a transmission step (S400).

[0062] The image acquisition step (S100) is a step of capturing a light emission image of a plurality of light-emitting elements (100) and measuring one or more values ​​among the luminance and color coordinates of each of the plurality of light-emitting elements (100). In the image acquisition step (S100), one or more values ​​among the luminance and color coordinates can be measured using a camera or a sensor.

[0063] The image processing step (S200) is a step of analyzing one or more values ​​among the luminance and color coordinates of each of the plurality of light-emitting elements (100) measured in the image acquisition step (S100). In other words, in the image processing step (S200), the average, deviation, or imbalance of one or more values ​​among the luminance and color coordinates of each of the plurality of light-emitting elements (100) can be measured.

[0064] The correction information generation step (S300) is a step of generating calibration information or correction values ​​to form the luminance, color coordinates, and luminance, etc. of a plurality of light-emitting elements (100) identically or similarly based on the average, deviation, or imbalance of one or more values ​​among the luminance and color coordinates of each of the plurality of light-emitting elements (100) measured in the image processing step (S200).

[0065] As a first example, the reference point of the correction value may be the brightness of the light-emitting element (100) having the lowest brightness among the plurality of light-emitting elements (100). The correction value may be set so that the brightness of the plurality of light-emitting elements (100) is set to the brightness of the light-emitting element (100) having the lowest brightness among the plurality of light-emitting elements (100). In other words, a light-emitting device (100) having high brightness may have a correction value to lower the brightness. Through this, the difficulty of design can be reduced while ensuring long-term reliability.

[0066] As a second example, the reference point for the correction value can be set to the average brightness of the light-emitting elements (100). For a plurality of light-emitting elements (100), a correction value can be set so that each brightness is similar to the average brightness. The difference between the similar brightness and the average brightness may be approximately ∂10%. A light-emitting device (100) having high brightness may have a correction value to lower the brightness so that it is set to a brightness similar to the average brightness. Additionally, a light-emitting device (100) having low brightness may have a correction value to increase the brightness so that it is set to a brightness similar to the average brightness. Through this, the difficulty of design can be reduced while maintaining brightness uniformity.

[0067] As a third example, the reference point of the correction value may be set based on a color temperature similar to the average color temperature of the plurality of light-emitting elements (100). The correction value may be set so that the color temperature of each of the plurality of light-emitting elements (100) is set to a color temperature similar to the average color temperature. For example, if the average color temperature of the plurality of light-emitting elements is 6500K, the plurality of light-emitting elements (100) may have a correction value to form the average of their respective color coordinates to a value close to (0.31, 0.32) based on the (x,y) color coordinates. The color coordinate deviation may have a deviation within ∂0.009 so that the color temperatures between the plurality of light-emitting elements (100) are similar. More preferably, the correction value may be set so that the color coordinates of the plurality of light-emitting elements (100) have a deviation within ∂0.003.

[0068] For more detailed color temperature coordinate adjustment, R, G, and B subpixels may each have different correction values. For example, a light-emitting element (100) with a low color temperature may have a correction value that increases the brightness of B among the subpixels. Alternatively, a light-emitting element (100) with a low color temperature may have a correction value that decreases the brightness of R among the subpixels. As another example, a light-emitting element (100) with a high color temperature may have a correction value that decreases the brightness of B among the subpixels. Alternatively, a light-emitting element (100) with a high color temperature may have a correction value that increases the brightness of R among the subpixels. Through this, color uniformity can be increased.

[0069] The transmission step (S400) is a step of transmitting calibration information or correction values ​​to the controller (200). In other words, in the transmission step (S400), calibration information or correction values ​​can be stored in the memory (220).

[0070] Hereinafter, the operation and effect of the light-emitting device (1) according to the first embodiment of the present invention will be described.

[0071] The controller (200) of the light-emitting device (1) of the present invention can control the current based on calibration information and supply it to each of the plurality of light-emitting elements (100). In other words, the controller (200) can make the amount of current supplied to any one of the plurality of light-emitting elements (100) smaller than the amount of current supplied to another of the plurality of light-emitting elements (100).

[0072] With this controller (200), the light of a plurality of light-emitting elements (100) can have the same or similar light intensity, brightness, and color.

[0073] In addition, since the color brightness and color reproduction rate of multiple light-emitting elements (100) can be improved, a high-quality light-emitting device (1) can be provided.

[0074] In addition, since the memory (220) can be included in the controller (200), the size of the light-emitting device (1) can be formed small, and an appropriate amount of light suitable for the purpose can be generated.

[0075] Hereinafter, with reference to FIG. 5, a light-emitting device (1) according to a second embodiment of the present invention will be described.

[0076] In describing the second embodiment, there are differences in that a communication device (400) is further included, a controller (200) and a substrate (300) are formed in multiple numbers, and a plurality of light-emitting elements (100) include a plurality of first light-emitting elements (110) and a plurality of second light-emitting elements (120). These differences will be explained in detail.

[0077] A plurality of first light-emitting elements (110) may be disposed on a first substrate (310) to be described later. A plurality of first light-emitting elements (110) may emit light of the same peak wavelength. The number of a plurality of first light-emitting elements (110) and a plurality of second light-emitting elements (110) may be the same or different. For example, the number of a plurality of first light-emitting elements (110) may be greater than the number of a plurality of second light-emitting elements (110).

[0078] A plurality of second light-emitting elements (120) may be disposed on a second substrate (320) to be described later. A plurality of second light-emitting elements (120) may emit light of the same peak wavelength. Additionally, a plurality of second light-emitting elements (120) may emit light of a different peak wavelength from a plurality of first light-emitting elements (110) or emit light of the same peak wavelength.

[0079] A plurality of controllers (200) can supply current supplied from an external source to a plurality of light-emitting elements (100). For example, a plurality of controllers (200) can receive current from a power supply unit (2). For example, the power supply unit (2) may be a vehicle battery installed in a vehicle. Such a plurality of controllers (200) may include a first controller (200a) and a second controller (200b).

[0080] The first controller (200a) can correct the light intensity of a plurality of first light-emitting elements (110). The first controller (200a) can supply current to the plurality of first light-emitting elements (110) based on first calibration information stored in advance. The first calibration information may include information regarding the light intensity, luminance, color coordinates, and color tone of each of the plurality of first light-emitting elements (110). Additionally, the first calibration information may include one or more of the amount of current supplied to each of the plurality of first light-emitting elements (110), the current supply time, the width of the current pulse, and the magnitude of the current. By this first controller (200a), the light generated from the plurality of first light-emitting elements (110) may have the same light intensity, luminance, and color coordinates. The light generated from a plurality of first light-emitting elements (110) and the light generated from a plurality of second light-emitting elements (120) may have different light intensities, luminance, and color coordinates. Additionally, the light generated from a plurality of first light-emitting elements (110) and the light generated from a plurality of second light-emitting elements (120) may have the same or similar light intensities, luminance, and color coordinates.

[0081] The second controller (200b) can correct the light intensity of a plurality of second light-emitting elements (120). The second controller (200b) can supply current to the plurality of second light-emitting elements (120) based on pre-stored second calibration information. The second calibration information may include information regarding the light intensity, brightness, and color tone of each of the plurality of second light-emitting elements (120). Additionally, the second calibration information may include one or more of the amount of current supplied to each of the plurality of second light-emitting elements (120), the current supply time, the width of the current pulse, and the magnitude of the current. By this second controller (200b), the light generated from the plurality of second light-emitting elements (120) may have the same light intensity, brightness, and color tone.

[0082] Additionally, the second controller (200a) may be positioned between the first light-emitting element (110) positioned closest to the second substrate (320) among the plurality of first light-emitting elements (110) and the second light-emitting element (120) positioned closest to the first substrate (310) among the plurality of second light-emitting elements (120).

[0083] The distance between the first controller (200a) and the second controller (200b) can be formed to be greater than the distance between the first light-emitting element (110) positioned closest to the second substrate (320) among the plurality of first light-emitting elements (110) to be described later, and the second light-emitting element (120) positioned closest to the first substrate (310) among the plurality of second light-emitting elements (120).

[0084] A plurality of substrates (300) may be spaced apart from each other in one direction to support a plurality of light-emitting elements (100), a plurality of controllers (200a), and a plurality of communication devices (400). These plurality of substrates (300) may include a first substrate (310) and a second substrate (320).

[0085] The first substrate (310) can support a plurality of first light-emitting elements (110), a first controller (200a), and a first communication device (410) to be described later. The second substrate (320) can support a plurality of second light-emitting elements (120), a second controller (200b), and a second communication device (420) to be described later. The first substrate (310) and the second substrate (320) can be spaced apart from each other in one direction.

[0086] The communication device (400) may be configured to communicate with the controller (200) and an external communication device (3) located outside. The communication device (400) may transmit information transmitted from a plurality of controllers (200) to the external communication device (3) or transmit information transmitted from the external communication device (3) to the controller (200). For example, the communication device (400) may be controlled by the controller (200a) to transmit information of light generated from a plurality of light-emitting elements (100) to the external communication device (3). Additionally, the controller (200) may control a plurality of light-emitting elements (100) based on the information transmitted from the external communication device (3). For example, the information transmitted from the external communication device (3) may be control information for driving a plurality of light-emitting elements (100). Additionally, the communication device (400) may include a first communication device (410) and a second communication device (420).

[0087] The first communication device (410) is placed on the first substrate (310) and can communicate with the first controller (200a), the second communication device (420), and the external communication device (3). The first communication device (410) can transmit information to be transmitted from the outside to the first controller (200a) and the second communication device (420). In addition, the first communication device (410) can transmit information transmitted from the first controller (200a) and the second communication device (420) to the external communication device (3).

[0088] The second communication device (420) is placed on the second substrate (320) and can communicate with the second controller (200b) and the first communication device (410). The second communication device (420) can transmit information to be transmitted from the first communication device (410) to the second communication device (420). Additionally, the second communication device (420) can transmit information transmitted from the second controller (200b) to the first communication device (410).

[0089] Meanwhile, although it is described that the communication device (400) is located outside the controller (200), it is not limited thereto, and the communication device (400) may be included in the controller (200). In other words, the first communication device (410) may be included in the first controller (200a). Additionally, the second communication device (420) may be included in the second controller (200b).

[0090] Hereinafter, the operation and effect of the light-emitting device (1) according to the second embodiment of the present invention will be described.

[0091] The first controller (200a) and the second controller (200b) can control the current supplied from the power supply (2) and supply it to a plurality of first light-emitting elements (110) and a plurality of second light-emitting elements (120). Through these first controller (200a) and second controller (200b), the plurality of first light-emitting elements (110) and the plurality of second light-emitting elements (120) can generate light simultaneously or sequentially.

[0092] In addition, since the first controller (200a) can supply current of the power supply (2) to a plurality of first light-emitting elements (110) based on the first calibration information, the light of the plurality of first light-emitting elements (110) can have the same light intensity, color tone, and brightness.

[0093] In addition, since the second controller (200b) can supply current from the power supply (2) to a plurality of second light-emitting elements (120) based on the second calibration information, the light from the plurality of second light-emitting elements (120) can have the same luminosity, color tone, and brightness.

[0094] In addition, a plurality of first light-emitting elements (110) and a plurality of second light-emitting elements (120) are arranged in one direction and can simultaneously emit light to have the same light intensity, color tone, and brightness, thereby providing a high-quality light-emitting device (1).

[0095] Although the embodiments of the present invention have been described above as specific embodiments, they are merely examples and the present invention is not limited thereto, but should be interpreted as having the broadest scope in accordance with the technical concept disclosed in this specification. Those skilled in the art may implement patterns of shapes not specified by combining or substituting the disclosed embodiments, and this also does not deviate from the scope of the present invention. Furthermore, those skilled in the art may easily modify or alter the disclosed embodiments based on this specification, and it is evident that such modifications or alterations also fall within the scope of the rights of the present invention.

Claims

1. Multiple light-emitting elements that generate light; A controller that stores calibration information in advance to correct the light intensity of light generated from the plurality of light-emitting elements and supplies current to the plurality of light-emitting elements based on the calibration information; and It includes the above controller and a substrate supporting the plurality of light-emitting elements, The above controller is spaced apart from the plurality of light-emitting elements on the substrate, Light-emitting device.

2. In Paragraph 1, The above controller is, A memory in which the above calibration information is stored; and A device control device comprising reading the calibration information stored in the memory and controlling the plurality of light-emitting elements. Light-emitting device.

3. In Paragraph 1, The above controller and the plurality of light-emitting elements are arranged in one direction on the substrate, Light-emitting device.

4. In Paragraph 1. The above calibration information includes information on a plurality of current amounts supplied to each of the plurality of light-emitting elements. Light-emitting device.

5. In Paragraph 4, The multiple current amounts included in the above calibration information are different, Light-emitting device.

6. In Paragraph 1, The above calibration information includes information regarding the magnitude of the current supplied to each of the plurality of light-emitting elements. Light-emitting device.

7. In Paragraph 6, The magnitudes of multiple currents included in the above calibration information are different, Light-emitting device.

8. In Paragraph 1, The above calibration information includes information regarding the width of the current pulse supplied to each of the plurality of light-emitting elements, Light-emitting device.

9. In Paragraph 6, The widths of the multiple current pulses included in the above calibration information are different, Light-emitting device.

10. In Paragraph 1, The above plurality of light-emitting elements are, When the same amount of current is supplied to the plurality of light-emitting elements above, they generate different light intensities, Light-emitting device.

11. A plurality of light-emitting elements that generate light; and It includes a memory storing calibration information for controlling the light intensity of light generated from the plurality of light-emitting elements, and The number of the above memories is less than the number of the above plurality of light-emitting elements, Light-emitting device.

12. In Paragraph 11, It further includes a device control device that reads calibration information stored in the memory and controls the plurality of light-emitting elements, and The distance between the above-mentioned device control device and the above-mentioned memory is shorter than the distance between the above-mentioned memory and the above-mentioned light-emitting device. Light-emitting device.

13. In Paragraph 11, The above plurality of light-emitting elements are spaced apart from each other in one direction, and The distance between the memory and the light-emitting element closest to the memory among the light-emitting elements is shorter than the separation distance between the plurality of light-emitting elements. Light-emitting device.

14. Multiple first light-emitting elements that generate light; A plurality of second light-emitting elements that generate light of a different peak wavelength from the plurality of first light-emitting elements; A first controller that supplies current to the plurality of light-emitting elements based on the first calibration information, wherein first calibration information is stored in advance to correct the light intensity of the light generated from the plurality of first light-emitting elements; A second controller that supplies current to the plurality of second light-emitting elements based on the second calibration information, wherein second calibration information is stored in advance to correct the light intensity of the light generated from the plurality of second light-emitting elements; A first substrate supporting the plurality of first light-emitting elements and the first controller; and A second substrate supporting the plurality of second light-emitting elements and the second controller, Light-emitting device.

15. In Paragraph 14, The plurality of first light-emitting devices are arranged in one direction on the first substrate, and The plurality of second light-emitting devices are arranged in one direction on the second substrate, and The second substrate and the first substrate are spaced apart from each other in one direction. Light-emitting device.

16. In Paragraph 14, A first communication device supported on the first substrate and communicating with the first controller; and A second communication device further comprising a second communication device supported on the second substrate and communicating with the second controller and the first communication device. Light-emitting device.

17. In Paragraph 16, The above-mentioned first communication device is, Receiving information transmitted from the outside and transmitting it to the first controller or to the second communication device, Light-emitting device.

18. In Paragraph 14, The separation distance between the first controller and the second controller is A distance greater than the distance between the first light-emitting element among the plurality of first light-emitting elements disposed closest to the second substrate and the second light-emitting element among the plurality of second light-emitting elements disposed closest to the first substrate. Light-emitting device.

19. In Paragraph 14, The above second controller is, A plurality of first light-emitting elements disposed closest to the second substrate, and a plurality of second light-emitting elements disposed closest to the first substrate, disposed between the first light-emitting element disposed closest to the first substrate. Light-emitting device.

20. In Paragraph 14, By the first controller and the second controller, the light intensity of the light generated from the plurality of first light-emitting elements and the plurality of second light-emitting elements is the same. Light-emitting device.

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