WO2025005706A1 - 발광 소자를 포함하는 발광 모듈 및 그것을 이용하는 디스플레이 장치 - Google Patents
발광 소자를 포함하는 발광 모듈 및 그것을 이용하는 디스플레이 장치 Download PDFInfo
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- WO2025005706A1 WO2025005706A1 PCT/KR2024/009050 KR2024009050W WO2025005706A1 WO 2025005706 A1 WO2025005706 A1 WO 2025005706A1 KR 2024009050 W KR2024009050 W KR 2024009050W WO 2025005706 A1 WO2025005706 A1 WO 2025005706A1
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- light
- light emitting
- circuit board
- emitting element
- emitting module
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R12/00—Structural associations of a plurality of mutually-insulated electrical connecting elements, specially adapted for printed circuits, e.g. printed circuit boards [PCB], flat or ribbon cables, or like generally planar structures, e.g. terminal strips, terminal blocks; Coupling devices specially adapted for printed circuits, flat or ribbon cables, or like generally planar structures; Terminals specially adapted for contact with, or insertion into, printed circuits, flat or ribbon cables, or like generally planar structures
- H01R12/70—Coupling devices
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10H—INORGANIC LIGHT-EMITTING SEMICONDUCTOR DEVICES HAVING POTENTIAL BARRIERS
- H10H20/00—Individual inorganic light-emitting semiconductor devices having potential barriers, e.g. light-emitting diodes [LED]
- H10H20/80—Constructional details
- H10H20/85—Packages
- H10H20/8506—Containers
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10H—INORGANIC LIGHT-EMITTING SEMICONDUCTOR DEVICES HAVING POTENTIAL BARRIERS
- H10H20/00—Individual inorganic light-emitting semiconductor devices having potential barriers, e.g. light-emitting diodes [LED]
- H10H20/80—Constructional details
- H10H20/85—Packages
- H10H20/852—Encapsulations
- H10H20/853—Encapsulations characterised by their shape
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10H—INORGANIC LIGHT-EMITTING SEMICONDUCTOR DEVICES HAVING POTENTIAL BARRIERS
- H10H20/00—Individual inorganic light-emitting semiconductor devices having potential barriers, e.g. light-emitting diodes [LED]
- H10H20/80—Constructional details
- H10H20/85—Packages
- H10H20/855—Optical field-shaping means, e.g. lenses
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10H—INORGANIC LIGHT-EMITTING SEMICONDUCTOR DEVICES HAVING POTENTIAL BARRIERS
- H10H20/00—Individual inorganic light-emitting semiconductor devices having potential barriers, e.g. light-emitting diodes [LED]
- H10H20/80—Constructional details
- H10H20/85—Packages
- H10H20/857—Interconnections, e.g. lead-frames, bond wires or solder balls
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10W—GENERIC PACKAGES, INTERCONNECTIONS, CONNECTORS OR OTHER CONSTRUCTIONAL DETAILS OF DEVICES COVERED BY CLASS H10
- H10W90/00—Package configurations
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
- G09G3/22—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources
- G09G3/30—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels
- G09G3/32—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED]
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10H—INORGANIC LIGHT-EMITTING SEMICONDUCTOR DEVICES HAVING POTENTIAL BARRIERS
- H10H20/00—Individual inorganic light-emitting semiconductor devices having potential barriers, e.g. light-emitting diodes [LED]
- H10H20/80—Constructional details
- H10H20/81—Bodies
- H10H20/819—Bodies characterised by their shape, e.g. curved or truncated substrates
- H10H20/82—Roughened surfaces, e.g. at the interface between epitaxial layers
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10H—INORGANIC LIGHT-EMITTING SEMICONDUCTOR DEVICES HAVING POTENTIAL BARRIERS
- H10H29/00—Integrated devices, or assemblies of multiple devices, comprising at least one light-emitting semiconductor element covered by group H10H20/00
- H10H29/10—Integrated devices comprising at least one light-emitting semiconductor component covered by group H10H20/00
- H10H29/14—Integrated devices comprising at least one light-emitting semiconductor component covered by group H10H20/00 comprising multiple light-emitting semiconductor components
- H10H29/142—Two-dimensional arrangements, e.g. asymmetric LED layout
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10H—INORGANIC LIGHT-EMITTING SEMICONDUCTOR DEVICES HAVING POTENTIAL BARRIERS
- H10H29/00—Integrated devices, or assemblies of multiple devices, comprising at least one light-emitting semiconductor element covered by group H10H20/00
- H10H29/80—Constructional details
- H10H29/85—Packages
- H10H29/852—Encapsulations
Definitions
- the present disclosure relates to a light-emitting module including a light-emitting element and a display device using the same.
- Light-emitting elements are semiconductor elements that use inorganic light sources, such as light-emitting diodes, and are widely used in various fields such as display devices, vehicle lamps, and general lighting. Light-emitting diodes have the advantages of long life, low power consumption, and fast response speed, and are quickly replacing existing light sources.
- micro LEDs light-emitting diodes
- the thickness of the display device can be drastically reduced.
- Embodiments of the present disclosure provide a light-emitting module suitable for a micro LED display and a display device having the same.
- Embodiments of the present disclosure provide a light-emitting module and a display device including a light-emitting element with improved light efficiency.
- Embodiments of the present disclosure provide a light emitting module and a display device having improved heat dissipation characteristics.
- a light-emitting module comprises: a base plate; a light-emitting element array substrate disposed on the base plate and including a plurality of light-emitting elements; a molding member covering the light-emitting elements; a circuit board having one end electrically connected to the light-emitting element array substrate; a connector electrically connected to the other end of the circuit board; and a reinforcing plate disposed below the connector.
- the above base plate may have a larger area than the light emitting element array substrate.
- the upper surface of the base plate may be exposed near at least three sides of the light emitting element array substrate.
- the transverse width of the base plate and the transverse width of the reinforcing plate may be greater than the transverse width of the circuit board positioned between the base plate and the reinforcing plate. Additionally, the longitudinal width of the base plate and the longitudinal width of the reinforcing plate may be greater than the longitudinal width of the circuit board positioned between the base plate and the reinforcing plate.
- the above light emitting element array substrate and the connector can be arranged on the same side of the circuit board.
- the above light emitting element array substrate and the connector can be respectively arranged on different surfaces of the circuit board.
- the above light emitting module may include a window surrounded by the molding portion.
- the above light emitting element array substrate can be mounted on the circuit board.
- the above connector can be formed on the circuit board.
- the above light emitting module is arranged opposite the connector and may further include a cover covering the passive element or the active element.
- a display device may include: a light-emitting module; a lens assembly; and a light guide, wherein the light-emitting module may include: a base plate; a light-emitting element array substrate disposed on the base plate and including a plurality of light-emitting elements; a molding part covering the light-emitting elements; a circuit board having one end electrically connected to the light-emitting element array substrate; a connector electrically connected to the other end of the circuit board; and a reinforcing plate disposed below the connector.
- the display device may include a plurality of light-emitting modules, each of which may emit light of a single color.
- the above light emitting module can be directly coupled to the lens assembly.
- the display device may further include an optical coupler, and light-emitting modules emitting light of different colors may be arranged on at least two sides of the optical coupler.
- Light-emitting modules emitting green light, red light, and blue light may be arranged on each of the three sides of the optical coupler, and the light-emitting module emitting green light may be arranged facing the lens assembly.
- the above base plate may have a larger area than the light emitting element array substrate.
- the above circuit board may be a flexible printed circuit board.
- the above light guide may include an automobile window or glass.
- the above display device can form an image within the light guide.
- the above lens assembly can diffuse light.
- FIG. 1 is a schematic exploded perspective view illustrating a light-emitting module according to a first embodiment of the present disclosure.
- FIG. 2A is a schematic cross-sectional view illustrating a light-emitting module according to the first embodiment of the present disclosure.
- FIG. 2B is a schematic cross-sectional view enlarged from a portion of a light-emitting module according to the first embodiment of the present disclosure.
- Figure 2C is a schematic plan view of Figure 2B.
- FIG. 3 is a schematic cross-sectional view illustrating a light-emitting module according to a second embodiment of the present disclosure.
- FIG. 4 is a schematic cross-sectional view illustrating a light-emitting module according to a third embodiment of the present disclosure.
- FIG. 5 is a schematic cross-sectional view illustrating a light-emitting module according to a fourth embodiment of the present disclosure.
- FIG. 6 is a schematic plan view illustrating a light-emitting module according to the fifth embodiment of the present disclosure.
- FIG. 7 is a schematic rear view illustrating a light-emitting module according to the fifth embodiment of the present disclosure.
- FIG. 8 is a schematic exploded plan view illustrating a display device having a light-emitting module according to the fifth embodiment of the present disclosure.
- FIG. 9 is a schematic plan view illustrating a light-emitting module according to the sixth embodiment of the present disclosure.
- FIG. 10 is a schematic side view illustrating a display device having a light-emitting module according to the sixth embodiment of the present disclosure.
- Figure 11 is a schematic plan view for explaining the display device of Figure 10.
- connection When an element, such as a layer, is referred to as being “on”, “connected to”, or “joined to” another element or layer, the element may be directly on, connected to, or joined to the other element or layer, or intervening elements or layers may be present. However, when an element or layer is referred to as being “directly on”, “connected to”, or “joined to” another element or layer, no intervening elements or layers are present.
- the term “connected” may refer to a physical, electrical, and/or fluidic connection, with or without intervening elements.
- spatially relative terms such as “beneath,” “beneath,” “directly beneath,” “lower,” “above,” “upper,” “above,” “higher,” “side,” (e.g., as in “side wall”), and the like, may be used for descriptive purposes and thereby to describe the relationship of one element to other element(s) as depicted in the drawings.
- the spatially relative terms are intended to encompass different orientations of the device in use, operation, and/or manufacture in addition to the orientations depicted in the drawings. For example, if the device in the drawings is turned over, an element described as “beneath” or “beneath” another element or feature will then be oriented “above” the other element or feature.
- the exemplary term "beneath” can encompass both orientations above and below. Additionally, the device can be oriented differently (e.g., rotated 90° or oriented in other orientations), and so the spatially relative descriptors used herein can also be interpreted accordingly.
- blocks, units, and/or modules may be 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 techniques or other manufacturing techniques.
- electronic circuits such as logic circuits, discrete components, microprocessors, wiring circuits, memory elements, and wiring connections, formed using semiconductor-based manufacturing techniques or other manufacturing techniques.
- microprocessors or other similar hardware, they may be programmed and controlled using software (e.g., microcode) to perform the various functions discussed herein, and optionally may be driven by firmware and/or software.
- each block, unit, and/or module may be implemented by dedicated hardware, or by a combination of dedicated hardware for performing some functions and processors (e.g., one or more programmed processors and associated circuitry) for performing other functions.
- processors e.g., one or more programmed processors and associated circuitry
- the blocks, units, and/or modules of each of the embodiments may be physically separated into two or more interacting and individual blocks, units, and/or modules without departing from the scope of the present invention.
- 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 present invention.
- the light-emitting module of the embodiments of the present disclosure can be applied to a display device.
- the light-emitting element included in the light-emitting module can be a micro LED. A detailed description of the light-emitting module will be described in detail with reference to the drawings below.
- a plurality of light-emitting elements (120) may be electrically connected to each other on a circuit board (110) by a circuit pattern so that they can be driven in series, in parallel, or individually.
- the circuit pattern may be formed so that the plurality of light-emitting elements (120) may each operate independently.
- the light-emitting elements (120) may be disposed on the circuit board (110) as a light source of the light-emitting module (1001).
- the light-emitting elements (120) may be driven individually.
- the light-emitting element (120) may be a light-emitting diode in which an n-type semiconductor layer is disposed in the direction of a light-emitting surface.
- the first semiconductor layer (11) is a p-type semiconductor layer and the second semiconductor layer (13) is an n-type semiconductor layer, but conversely, the first semiconductor layer (11) may be an n-type semiconductor layer and the second semiconductor layer (13) may be a p-type semiconductor layer.
- the first semiconductor layer (11) may be formed of a compound semiconductor of group III-V, group II-VI, etc.
- the first semiconductor layer (11) may be an n-type semiconductor layer doped with an n-type dopant.
- the second semiconductor layer (13) may be formed of a compound semiconductor of group III-V, group II-VI, etc.
- the second semiconductor layer (13) may be a p-type semiconductor layer doped with a p-type dopant.
- the second semiconductor layer (13) may be formed of AlGaN or GaN doped with a p-type dopant.
- the light-emitting element (120) in which the second electrode (160) is formed of a light-transmitting material can be applied to a light-emitting module mounted on a transparent display device.
- the circuit board (110) of the light-emitting module (1001) can also be formed of a light-transmitting material.
- the display device can act like transparent glass.
- the thickness of the second electrode (160) can be different from the thickness of the first electrode (140). By making the thickness of the second electrode (160) different from the thickness of the first electrode (140), the transmittance of light transmitted upwardly and downwardly can be controlled.
- the width of the second electrode (160) can be different from the width of the first electrode (140).
- An insulating layer (15) may be formed on the upper portion of the second electrode (160).
- the insulating layer (15) may be formed to cover at least a portion of the first electrode (160) and the upper and side surfaces of the light-emitting element (120).
- the insulating layer (15) may be formed of SiO2.
- the insulating layer (15) may include an opening (16) disposed on the upper portion of the light-emitting structure (10).
- the opening (16) of the insulating layer (15) may be located on the upper portion of the second electrode (160).
- the opening (16) of the insulating layer (15) may be located on or near a central vertical line based on the width of the light-emitting element (120).
- the difference between the distance (d1) to one side of the boundary of the opening (16) and the distance (d2) to the other side based on the central axis of the opening (16) of the insulating layer (15) may be about 20% or less.
- d1 and d2 may be the same.
- the virtual line (A) passing through the center of the opening (16) may be spaced apart from the virtual line (B) passing through the center of the second electrode (160).
- the virtual line (A) passing through the center of the opening (16) may be spaced apart from the virtual line (C) passing through the center of the second conductive semiconductor layer (13). Accordingly, when a plurality of materials are laminated on the light-emitting element (120), the stress applied to the light-emitting element (120) may be dispersed.
- a conductive electrode (170) formed of a conductive material may be formed on the upper portion of the insulating layer (15).
- the conductive electrode (170) may be formed to cover at least a portion of the upper surface of the insulating layer (15) and may be formed to contact the second electrode (160) through the opening (16) of the insulating layer (15). Therefore, the conductive electrode (170) may be electrically connected to the second semiconductor layer (13) of the light-emitting element (120) through the second electrode (160).
- the conductive electrode (17) may be formed along the surface of the insulating layer (15) and may have a concave structure in the region where the opening (16) of the insulating layer (15) is formed.
- the thickness of the insulating layer (15) may be thinner than the thickness of the light-emitting element (120). Therefore, the loss of light emitted from the light-emitting element (120) may be reduced.
- the second electrode (160) is described as being positioned between the light-emitting element (120) and the conductive electrode (170), the second electrode (160) may be omitted. Accordingly, a part of the light-emitting element (120) may be covered by the insulating layer (15), and the conductive electrode (170) may be formed so that the conductive electrode (170) may come into contact with the light-emitting element (120).
- the light emitting element (120) may be a micro LED. That is, the light emitting element (120) may have a size in which the width and length of the cross-sectional area are each 100 ⁇ m or less. Furthermore, the cross-sectional area size of the light emitting element (120) may be 30 ⁇ m ⁇ 30 ⁇ m or less. Furthermore, the cross-sectional area size of the light emitting element (120) may be 10 ⁇ m ⁇ 10 ⁇ m or less.
- a first molding layer (130) may be placed on an upper portion of a substrate (110) on which a light-emitting element (120) is mounted.
- the first molding layer (130) covers a side surface of the light-emitting element (120), and when a plurality of light-emitting elements (120) are mounted, the first molding layer (130) may be placed between the plurality of light-emitting elements (120), and further may be formed to surround the plurality of light-emitting elements (120).
- the first molding layer (130) may cover a side surface of a first electrode (140) that is placed between the light-emitting element (120) and the substrate (110).
- the first molding layer (130) covers the boundary between the insulating layer (15) and the first electrode (140), the light-emitting element (120) may be prevented from being peeled off from the first electrode (140).
- the width of the first molding layer (130) arranged between the light emitting element (120) and the adjacent light emitting element (120) may be greater than the thickness of the insulating layer (15) arranged on the side of the light emitting element (120).
- a second molding layer (150) may be arranged on the first molding layer (130).
- the second molding layer (150) may be formed of a different material or a material having different properties from the first molding layer (130), and an interface may be formed between the second molding layer (150) and the first molding layer (130).
- the second molding layer (150) and the first molding layer (130) may be formed simultaneously in one process, or the first molding layer (130) may be formed first and then the second molding layer (150).
- the second molding layer (150) includes a first surface that contacts the first molding layer (150) and a second surface that is positioned to face the first surface, and the second surface may include an anti-glare surface.
- the second molding layer (150) may be formed of a material having a higher light absorption rate than the first molding layer (130). Accordingly, when light generated from the light-emitting element (120) and emitted to the outside of the light-emitting module (1001) is re-incident into the light-emitting module (1001), the formation of an image such as a ghost can be prevented by absorbing the light in the second molding layer (150). Meanwhile, a window may be formed in the second molding layer (150) to prevent light generated from the light-emitting element (120) from being absorbed in the second molding layer (150). The window may be formed by partially removing the second molding layer (150) or by using a material having a higher light transmittance than the second molding layer (150).
- the first semiconductor layer (11) of the light-emitting element (120) may have a flat surface or may have a surface including unevenness.
- the width of the unevenness is formed within 5 um to enable stable connection with the electrode.
- the light-emitting element (120) may have a structure in which at least a portion thereof changes width as it goes upward.
- the width of the light-emitting element (120) may be such that the width of the first semiconductor layer (11) is greater than the width of the second semiconductor layer (13).
- the light-emitting element (120) may have an obtuse angle formed by an inclined plane between an upper surface or lower surface and a side surface connected thereto. Accordingly, the phenomenon of current concentration at the corners may be alleviated compared to when the angle formed between the upper surface or lower surface of the light-emitting element (120) and the side surface connected thereto is a right angle.
- a plurality of light emitting elements (120) may be arranged in the light emitting module (1001), and light generated from the plurality of light emitting elements (120) is emitted by passing through the second semiconductor layer (13).
- the thickness of the second semiconductor layer (13) may be smaller than the thickness of the first semiconductor layer (11), and light extraction efficiency may be improved by reducing absorption inside the semiconductor layer on the path through which light generated from the active layer (12) is extracted to the outside.
- the active layer (12) may be arranged above the center of the maximum thickness of the light emitting element (120). Since the distance from the active layer (12) where light is generated to the upper surface of the first molding layer (130) or the interface between the first molding layer (130) and the second molding layer (150) can be shortened, light extraction can be increased, thereby improving image clarity.
- the light emitting element (120) has a structure in which at least a portion thereof changes width as it goes upward or in the light emitting direction.
- the width of the semiconductor layer disposed closer to the substrate (110) may be larger than the width of the semiconductor layer disposed closer to the light emitting direction.
- the side of the light emitting element (120) may include an inclined side.
- the width of the conductive electrode (170) may be about 80% or less of the width of the light-emitting element (120). Accordingly, light generated from the light-emitting element (120) may be emitted to the outside without being obstructed by the conductive electrode (170).
- the first electrode (140) electrically connected to the plurality of light-emitting elements (120) may serve as a common electrode.
- the first electrode (140) may be connected to a common electrode formed on the circuit board (110). Accordingly, an electrical signal may be simultaneously supplied to the first semiconductor layers (11) of the plurality of light-emitting elements (120) through the first electrode (140).
- the second electrode (160) or the conductive electrode (170) is disposed on each of the light-emitting elements (120), and they may be spaced apart from each other and electrically spaced apart from each other.
- the common electrode is disposed between the substrate (110) and the light-emitting elements (120), and the second electrode (160) or the conductive electrode (170), which is an individual electrode, is disposed between the light-emitting elements (120) and the first molding layer (130).
- the second electrode (160) or conductive electrode (170) electrically connected to the plurality of light-emitting elements (120) may serve as a common electrode. Accordingly, an electrical signal may be simultaneously supplied to the second semiconductor layers (13) of the light-emitting elements (120) through the second electrode (160) or conductive electrode (170). Accordingly, light generated from each light-emitting element (120) may be emitted in the direction in which the common electrode is formed.
- the second electrode (160) or conductive electrode (170) serving as a common electrode includes a light-transmitting material
- the second electrode (160) or conductive electrode (170) may have light transmittance for a plurality of wavelengths so that light of a plurality of wavelengths may pass through the light-transmitting common electrode and be emitted.
- the first electrode (140) is disposed on each of the light-emitting elements (120), and they may be disposed spaced apart from each other and may also be electrically spaced.
- FIG. 3 is a schematic cross-sectional view illustrating a light-emitting module (1001a) according to a second embodiment of the present disclosure.
- the light-emitting module (1001a) is generally similar to the light-emitting module (1001) described with reference to FIGS. 1, 2A, 2B, and 2C, but differs in that light generated from a plurality of light-emitting elements (120) passes through the first semiconductor layer (11) and is emitted.
- the thickness of the first semiconductor layer (11) may be greater than the thickness of the second semiconductor layer (13), and the active layer (12) may be arranged below the center of the maximum thickness of the light-emitting element (120).
- the light emitting element (120) has a structure in which at least a portion thereof changes width as it goes upward or in the light emitting direction.
- the width of the semiconductor layer disposed closer to the substrate (110) may be narrower than the width of the semiconductor layer disposed closer to the light emitting surface. Accordingly, the width of the light emitting element (120) in the light emitting direction becomes wider, so that a large amount of light can be emitted.
- the light emitting element (120) may include an inclined side surface.
- the width of the conductive electrode (170) may be about 80% or less of the width of the light emitting element (120). Accordingly, light generated from the light emitting element (120) may be emitted to the outside without being obstructed by the conductive electrode (170).
- the width of the first electrode (140) may be about 80% or less of the width of the light-emitting element (120). Accordingly, light generated from the light-emitting element (120) may be emitted to the outside without being obstructed by the first electrode (140).
- the first electrode (140) electrically connected to the plurality of light-emitting elements (120) may serve as a common electrode. Accordingly, an electrical signal may be simultaneously supplied to the first semiconductor layers (11) of the plurality of light-emitting elements (120) through the first electrode (140). Accordingly, light generated from each light-emitting element (120) may be emitted in the direction in which the common electrode is formed.
- the second electrode (160) or the conductive electrode (170) may be disposed on each of the light-emitting elements (120), may be disposed spaced apart from each other, and may also be electrically spaced apart. Accordingly, the individual electrodes are disposed between the substrate (110) and the light-emitting elements (120), and the first electrode (140), which is a common electrode, is disposed between the light-emitting elements (120) and the first molding layer (130).
- the second electrode (160) or conductive electrode (170) electrically connected to the plurality of light-emitting elements (120) may serve as a common electrode. Accordingly, an electrical signal may be simultaneously supplied to the second conductive layers (13) of the light-emitting elements (120) through the second electrode (160) or conductive electrode (170).
- the second electrode (160) or conductive electrode (170) may have light transmittance for a plurality of peak wavelengths, or may have reflectivity for a plurality of peak wavelengths.
- the first electrode (140) may be disposed on each of the plurality of light-emitting elements (120), may be disposed spaced apart from each other, and may also be electrically spaced apart.
- FIG. 4 is a schematic cross-sectional view for explaining a light-emitting module (1001b) according to a third embodiment of the present disclosure.
- the light-emitting module (1001b) according to the present embodiment is generally similar to the light-emitting module (1001b) described with reference to FIG. 3, but differs in that the light-emitting element (120) has unevenness formed on the light-emitting surface.
- the unevenness may be formed within the area of the first semiconductor layer (11) so as not to exceed the width of the first semiconductor layer (11).
- the outermost surface of the unevenness may include an inclined surface, and the angle formed by the inclined surface of the unevenness and the side inclined surface of the semiconductor layer may be 90° or more or an obtuse angle.
- the first electrode (140) may be formed along the uneven surface, and the first molding layer (130) may fill the concave portions of the uneven surface.
- this is not necessarily limited to the first electrode (140) and may fill the concave portions of the uneven surface to make the slope of the uneven surface gentle, thereby making the shape of the uneven surface gentle at the boundary where the first molding layer (130) covers the light-emitting element (120).
- FIG. 5 is a schematic cross-sectional view for explaining a light-emitting module (1001c) according to the fourth embodiment of the present disclosure.
- the light-emitting module (100c) is generally similar to the light-emitting modules (1001, 1001a, 1001b) described above, but differs in that the light-emitting element (120) has a flip-chip structure. That is, both the first electrode (170a) and the second electrode (170b) are positioned between the light-emitting element (120) and the circuit board (110), and are flip-bonded to the electrodes (115a, 115b) of the circuit board (110). Instead of or in addition to the second electrode (170b), a conductive electrode may be formed.
- Light emitted from the light emitting element (120) can be emitted through the first semiconductor layer (11), and light efficiency can be improved because there is no electrode on the light emitting surface.
- FIG. 6 is a schematic plan view for explaining a light-emitting module (2001) according to a fifth embodiment of the present disclosure
- FIG. 7 is a schematic back view for explaining a light-emitting module (2001) according to a fifth embodiment of the present disclosure
- FIG. 8 is a schematic exploded plan view for explaining a display device having a light-emitting module (2001) according to a fifth embodiment of the present disclosure.
- a light-emitting module (2001) may include a light-emitting element array substrate (200), a base plate (210), a molding portion (230), a window (230W), an extension portion (240), a circuit board (250), a reinforcement plate (260), a connector (270), and a cover (280).
- the light emitting element array substrate (200) includes a circuit board and an array of light emitting elements arranged on the circuit board as described with reference to FIG. 1.
- the light emitting elements arranged in the light emitting element array substrate (200) may be light emitting elements that emit light of different wavelengths, or may be light emitting elements that emit light of the same color.
- the light emitting elements arranged in the light emitting element array substrate (200) may be light emitting elements that emit red light, green light, and blue light and may be regularly arranged.
- the light emitting elements arranged in the light emitting element array substrate (200) may be light emitting elements that emit red light, green light, or blue light.
- the light emitting elements arranged in the light emitting element array substrate (200) may be light emitting elements that emit green light and blue light.
- the light emitting element array substrate (200) is disposed on a base plate (210).
- the base plate (210) may be formed of a more solid material than the circuit board (250), for example, may be formed of a metal.
- the base plate (210) may also be a thermally conductive material and may aid in the dissipation of heat generated in the light emitting element array substrate (200).
- the base plate (210) may have a larger area than the light emitting element array substrate (200) mounted thereon.
- the light emitting element array substrate (200) may have a transverse width (W1) and a longitudinal width (W5), and the base plate (210) may have a transverse width (W2) and a longitudinal width (W6).
- the transverse width (W2) and the longitudinal width (W6) of the base plate (210) may be larger than the transverse width (W1) and the longitudinal width (W5) of the light emitting element array substrate (200), respectively. Furthermore, as illustrated in FIG. 6, the upper surface of the base plate (210) can be exposed near at least three sides of the light emitting element array substrate (200). Therefore, the array substrate (200) can be prevented from being preferentially affected by external factors, and can be effective in heat dissipation.
- the light emitting element array substrate (200) may be covered with a molding part (230).
- the molding part (230) is formed of a material having a relatively high light absorbency and absorbs light incident from the outside. Meanwhile, a window (230W) is surrounded by the molding part (230).
- the window (230W) is a region where light generated from the light emitting element array substrate (200) is emitted.
- the window (230W) may be formed of a material having a higher light transmittance than the molding part (230) or may be formed by at least partially removing the molding part (230). Meanwhile, another molding part having a higher light transmittance than the molding part (230) may be added between the molding part (230) and the light emitting element array substrate (200).
- the circuit board (250) may be a flexible printed circuit board.
- the circuit board (250) has a circuit pattern.
- the circuit board (250) may be electrically connected to the light emitting element array substrate (200) disposed on the extension portion (240).
- the circuit pattern in the light emitting element array substrate (200) and the circuit pattern in the circuit board (250) may be connected via bonding wires, and the extension portion (240) may be packaged for electrical safety.
- the extension portion (240) and the circuit board (250) may be physically connected or electrically connected.
- the circuit pattern in the light emitting element array substrate (200) and the circuit pattern in the circuit board (250) may be connected via a connecting socket.
- the light emitting element array substrate (200) may be mounted on the circuit board (250).
- the connector (270) can be electrically connected to the light emitting element array substrate (200) and can supply an electrical signal to the light emitting element array substrate (200).
- the connector (270) can be disposed on a reinforcing plate (260).
- the reinforcing plate (260) increases the strength of an area where the connector (270) is disposed, thereby helping to connect the connector and an external component.
- the reinforcing plate (260) may also include a thermally conductive material.
- a marking capable of exposing information of the light emitting module (2001) may be provided on one surface of the circuit board (250).
- the left-right width of the circuit board (250) may be smaller than the up-down length. That is, the circuit board (250) is formed to have a longitudinal direction, and the light emitting element array substrate (200) and the connector (270) may be disposed along the longitudinal direction. Therefore, the center of gravity of the light emitting module (2001) can be maintained.
- the connector (270) may include a power supply unit or a driver IC.
- a neck portion of a circuit board (250) positioned between an extension portion (240) and a reinforcing plate (260) has a transverse width (W3) and a longitudinal width (W7).
- the transverse width (W3) of the circuit board (250) is smaller than the transverse width (W2) of the base plate (210) and the transverse width (W4) of the reinforcing plate (260).
- the longitudinal width (W7) of the circuit board (250) is smaller than the longitudinal width (W6) of the base plate (210) and the longitudinal width (W8) of the reinforcing plate (260). Accordingly, the overall external size of the light emitting module (2001) can be reduced while maintaining flexibility.
- the extension portion (240) and the reinforcing plate (260) can be symmetrical with respect to the circuit board (250).
- the extension (240), circuit board (250) and reinforcement plate (260) may be formed as an integral part.
- the cover layer (280) may be arranged on the other side of the reinforcing plate (260) facing the connector (270).
- the cover layer (280) protects various active or passive elements, for example, resistors, etc.
- the area of the cover layer (280) may be smaller than the area of the base plate (210). Therefore, when the light-emitting module (2001) is installed in a device such as a projector, the weight is biased toward the area where the cover layer (280) is arranged, thereby preventing the light-emitting module (2001) from being detached.
- the light emitting element array substrate (200) and the connector (270) are illustrated and described as being arranged on the upper surface side of the circuit board (250), and the base plate (210) and the cover layer (280) are arranged on the lower surface side of the circuit board (250), but the present disclosure is not limited thereto.
- the light emitting element array substrate (200) and the cover layer (280) may be arranged on the upper surface side of the circuit board (250), and the base plate (210) and the connector (270) may be arranged on the lower surface side of the circuit board (250).
- a display device may include a plurality of light-emitting modules (2001a, 2001b, 2001c), an optical coupler (2100), a lens assembly (2200), and a light guide (2007).
- the plurality of light-emitting modules (2001a, 2001b, 2001c) are similar to the light-emitting module (2001) described with reference to FIGS. 6 and 7, respectively, and can emit light of a single color.
- the light-emitting module (2001a) can emit green light
- the light-emitting module (2001b) can emit red light
- the light-emitting module (2001c) can emit blue light.
- the optical coupler (2100) couples the light emitted from the light emitting modules (2001a, 2001b, 2001c).
- the optical coupler (2100) may have, for example, a hexahedral shape, and the light emitting modules (2001a, 2001b, 2001c) may be arranged on each of the three sides of the optical coupler (2100).
- the light emitted from the light emitting module (2001a) is incident on the optical coupler (2100) and then passes through the light emitting surface of the optical coupler (2100) in the incident direction. Meanwhile, the light incident on the optical coupler (2100) from the light emitting module (2001b) and the light emitting module (2001c) is reflected internally and then passes through the light emitting surface of the optical coupler (2100). Accordingly, the light emitted from the light emitting modules (2001a, 2001b, 2001c) is combined within the optical coupler (2100). Meanwhile, by arranging the light emitting module (2001a) emitting green light to face the lens assembly (2200), the green light can pass through the optical coupler (2100) without reflection within the optical coupler (2100). Accordingly, the loss of the green light can be minimized, which is more effective in reproducing a color image.
- the lens assembly (2200) may include a barrel (2003) and lenses (2005).
- the barrel (2003) fixes the positions of the lenses (2003) and protects the lenses (2005).
- the lenses (2005) diffuse or converge light passing through the optical coupler (2100).
- a combination of various lenses may be used.
- the optical coupler (2100) can be placed within the housing, and the lens assembly (220) can be coupled to the housing.
- insertion holders are provided on three sides of the housing, and light-emitting modules (2001a, 2001b, 2001c) can be coupled to the insertion holders.
- a cover that covers the light-emitting modules can be coupled to the housing to protect the light-emitting modules (2001a, 2001b, 2001c).
- the light guide (2007) guides light incident through the lens assembly (2200) to form an image.
- the light guide (2007) may be, for example, a car window, augmented reality glasses, etc. Accordingly, light emitted from the light-emitting modules can form an image on the car window or glasses.
- a color image is implemented by using three types of light-emitting modules (2001a, 2001b, 2001c), but the present disclosure is not limited thereto.
- one light-emitting module may emit light of two colors, and the other light-emitting modules may each emit light of one color.
- the light-emitting module (2001a) may emit green light and blue light, and the light-emitting modules (2001b, 2001c) may emit red light. Accordingly, the intensity of the red light can be relatively greatly enhanced.
- One of the light-emitting modules (2001b, 2001c) may be omitted.
- At least two connectors (270) among the connectors (270) arranged in each module (2001a, 2001b, 2001c) may be arranged to face each other.
- the connectors (270) arranged in each module (2001a, 2001b, 2001c) may be arranged to face the center of the optical coupler (2100). Accordingly, the distance between the connectors (270) and the optical coupler (2100) can be further narrowed.
- the light emitting module (2001a) may emit green light and blue light
- the light emitting modules (2001b, 2001c) may emit red light and green light, respectively. Accordingly, the intensity of the green light can be relatively further enhanced.
- the light emitting module (2001a) may emit blue light and red light, and the light emitting modules (2001b, 2001c) may each emit green light. Accordingly, the intensity of the green light can be greatly enhanced. Furthermore, the positions of the light emitting modules (2001a) emitting light of two colors can also be varied.
- a micro lens array may be placed between the light emitting modules (2001a, 2001b, 2001c) and the optical coupler (2100).
- the micro lens array may be formed within each light emitting module.
- FIG. 9 is a schematic plan view for explaining a light-emitting module (3001) according to the sixth embodiment of the present disclosure
- FIG. 10 is a schematic side view for explaining a display device having a light-emitting module (3001) according to the sixth embodiment of the present disclosure
- FIG. 11 is a schematic plan view for explaining the display device of FIG. 10.
- a light-emitting module (3001) may include a light-emitting element array substrate (300), a base plate (310), a molding part (330), a window (330W), a circuit board (350), a reinforcing plate, and a connector (370).
- the light emitting element array substrate (300), the molding portion (330), and the window (330W) are similar to the light emitting element array substrate (200), the molding portion (230), and the window (230W) described with reference to FIG. 6, and therefore, a detailed description thereof is omitted to avoid duplication.
- the light emitting element array substrate (300) may be mounted on a circuit board (350), and a base plate (310) may be coupled to the circuit board (350) facing the light emitting element array substrate (300).
- the circuit board (350) may be a flexible printed circuit board, and the base plate (310) reinforces the flexibility of the circuit board (350).
- the base plate (310) may also be a heat sink.
- the connector (370) is similar to the connector (270) described with reference to FIG. 6, except that the connector (370) is formed on the circuit board (350).
- a reinforcing plate (360) is arranged opposite the connector (370), and the reinforcing plate (360) reinforces the strength of the circuit board (350).
- the base plate (310) and the reinforcing plate (360) are arranged on the lower surface side of the circuit board (350), and the light emitting element array substrate (300) and the connector (370) are arranged on the upper surface side of the circuit board (350).
- the present disclosure is not necessarily limited thereto.
- the transverse width of the base plate (310) or the transverse width of the reinforcing plate (360) may be larger than the transverse width of the circuit board (350), but is not necessarily limited thereto, and may be the same. Furthermore, the transverse width of the light emitting element array substrate (330) may be smaller than the transverse width of the base plate (310), but is not limited thereto, and may be the same.
- the display device may include a light emitting module (3001), a lens assembly (3200), and a light guide (3007).
- the light emitting module (3001) is coupled to the lens assembly (3200) without using an optical coupler. That is, the light emitting module (3001) can be directly coupled to the lens assembly (2200).
- the lens assembly (3200) includes a barrel (3003) and lenses (3005) similar to the lens assembly (2200) described with reference to FIG. 8.
- light emitting modules (3001a, 3001b, 3001c) can be coupled to a light guide (3007).
- the light emitting modules (3001a, 3001b, 3001c) can emit red light, green light, and blue light, respectively.
- Three light emitting modules (3001a, 3001b, 3001c) are coupled to the light guide, and a color image can be formed in a specific area (3009) of the light guide by the light emitted from these light emitting modules.
- the image is implemented using three light-emitting modules (3001a, 3001b, 3001c), but the present disclosure is not limited thereto.
- a display device may be provided in which a single light-emitting module emitting light of a single color or light of two or more colors is coupled to a light guide.
- a light-emitting module emitting light of two colors and a light-emitting module emitting light of a single color for example, a light-emitting module emitting green light and blue light and a light-emitting module emitting red light, may be coupled to a light guide.
- a plurality of light-emitting modules emitting light of the same color may be coupled to a light guide to enhance the intensity of light of a specific color.
- a light-emitting module emitting green light or a light-emitting module emitting red light may be added to the three light-emitting modules described above.
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Abstract
Description
Claims (20)
- 발광 모듈에 있어서,베이스 플레이트;상기 베이스 플레이트 상에 배치되고, 복수의 발광 소자들을 포함하는 발광 소자 어레이 기판;상기 발광 소자들을 덮는 몰딩부;일단이 상기 발광 소자 어레이 기판에 전기적으로 접속된 회로 기판;상기 회로 기판의 타단에 전기적으로 접속된 커넥터; 및상기 커넥터 하부에 배치된 보강 플레이트를 포함하는 발광 모듈.
- 청구항 1에 있어서,상기 베이스 플레이트는 상기 발광 소자 어레이 기판보다 큰 면적을 갖는 발광 모듈.
- 청구항 2에 있어서,상기 발광 소자 어레이 기판의 적어도 3측면 근처에서 상기 베이스 플레이트의 상면이 노출된 발광 모듈.
- 청구항 2에 있어서,상기 베이스 플레이트의 횡방향 폭 및 상기 보강 플레이트의 횡방향 폭은 상기 베이스 플레이트와 상기 보강 플레이트 사이에 위치하는 상기 회로 기판의 횡방향 폭보다 크고,상기 베이스 플레이트의 종방향 폭 및 상기 보강 플레이트의 종방향 폭은 상기 베이스 플레이트와 상기 보강 플레이트 사이에 위치하는 상기 회로 기판의 종방향 폭보다 큰 발광 모듈.
- 청구항 1에 있어서,상기 발광 소자 어레이 기판과 상기 커넥터는 상기 회로 기판의 동일면 측에 배치된 발광 모듈.
- 청구항 1에 있어서,상기 발광 소자 어레이 기판과 상기 커넥터는 상기 회로 기판의 서로 다른 면측에 각각 배치된 발광 모듈.
- 청구항 1에 있어서,상기 몰딩부로 둘러싸인 윈도우를 포함하는 발광 모듈.
- 청구항 1에 있어서,상기 발광 소자 어레이 기판은 상기 회로 기판 상에 실장된 발광 모듈.
- 청구항 1에 있어서,상기 커넥터는 상기 회로 기판 상에 형성된 발광 모듈.
- 청구항 1에 있어서,상기 커넥터에 대향하여 배치되며, 수동 소자 또는 능동 소자를 덮는 덮개를 더 포함하는 발광 모듈.
- 디스플레이 장치에 있어서,발광 모듈;렌즈 어셈블리; 및광 가이드를 포함하되,상기 발광 모듈은베이스 플레이트;상기 베이스 플레이트 상에 배치되고, 복수의 발광 소자들을 포함하는 발광 소자 어레이 기판;상기 발광 소자들을 덮는 몰딩부;일단이 상기 발광 소자 어레이 기판에 전기적으로 접속된 회로 기판;상기 회로 기판의 타단에 전기적으로 접속된 커넥터; 및상기 커넥터 하부에 배치된 보강 플레이트를 포함하는, 디스플레이 장치.
- 청구항 11에 있어서,복수의 발광 모듈을 포함하되, 발광 모듈들은 각각 단일 색상의 광을 방출하는 디스플레이 장치.
- 청구항 11에 있어서,상기 발광 모듈은 상기 렌즈 어셈블리에 직접 결합된 디스플레이 장치.
- 청구항 11에 있어서,광 결합기를 더 포함하되,상기 광 결합기의 적어도 2면에 서로 다른 색상의 광을 방출하는 발광 모듈들이 배치된 디스플레이 장치.
- 청구항 14에 있어서,상기 광 결합기의 3면에 각각 녹색광, 적색광, 및 청색광을 방출하는 발광 모듈들이 배치되되, 녹색광을 방출하는 발광 모듈이 상기 렌즈 어셈블리에 대향하여 배치된 디스플레이 장치.
- 청구항 11에 있어서,상기 베이스 플레이트는 상기 발광 소자 어레이 기판보다 큰 면적을 갖는 디스플레이 장치.
- 청구항 11에 있어서,상기 회로 기판은 좌우 너비는 상하 길이보다 작은 디스플레이 장치.
- 청구항 11에 있어서,상기 발광 모듈은 보강 플레이트에 배치되는 커버층을 더 포함하며, 상기 커버층의 면적은 상기 베이스 플레이트의 면적보다 작디스플레이 장치.
- 청구항 18에 있어서,상기 광 가이드 내에 이미지를 형성하는 디스플레이 장치.
- 청구항 11에 있어서,상기 렌즈 어셈블리는 광을 확산시키는 디스플레이 장치.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| EP24832483.2A EP4719007A1 (en) | 2023-06-28 | 2024-06-28 | Light emitting module including light emitting element and display device using same |
Applications Claiming Priority (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US202363523744P | 2023-06-28 | 2023-06-28 | |
| US63/523,744 | 2023-06-28 | ||
| US18/756,352 | 2024-06-27 | ||
| US18/756,352 US20250063861A1 (en) | 2023-06-28 | 2024-06-27 | Light emitting module having light emitting device and display apparatus having same |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2025005706A1 true WO2025005706A1 (ko) | 2025-01-02 |
Family
ID=93939361
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/KR2024/009050 Ceased WO2025005706A1 (ko) | 2023-06-28 | 2024-06-28 | 발광 소자를 포함하는 발광 모듈 및 그것을 이용하는 디스플레이 장치 |
Country Status (3)
| Country | Link |
|---|---|
| US (1) | US20250063861A1 (ko) |
| EP (1) | EP4719007A1 (ko) |
| WO (1) | WO2025005706A1 (ko) |
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- 2024-06-27 US US18/756,352 patent/US20250063861A1/en active Pending
- 2024-06-28 WO PCT/KR2024/009050 patent/WO2025005706A1/ko not_active Ceased
- 2024-06-28 EP EP24832483.2A patent/EP4719007A1/en active Pending
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| KR101740006B1 (ko) * | 2016-11-23 | 2017-06-09 | 지스마트 주식회사 | 내구성이 강화된 투명전광판용 연성회로기판 및 그 조립방법 |
| JP2019012710A (ja) * | 2018-10-30 | 2019-01-24 | 株式会社小糸製作所 | 車両用灯具 |
| KR20220089621A (ko) * | 2020-12-21 | 2022-06-28 | 코어트로닉 코포레이션 | 프로젝션 장치 |
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| US20250063861A1 (en) | 2025-02-20 |
| EP4719007A1 (en) | 2026-04-01 |
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