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WO2020116944A1 - Substrat d'éclairage à del - Google Patents

Substrat d'éclairage à del Download PDF

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Publication number
WO2020116944A1
WO2020116944A1 PCT/KR2019/017054 KR2019017054W WO2020116944A1 WO 2020116944 A1 WO2020116944 A1 WO 2020116944A1 KR 2019017054 W KR2019017054 W KR 2019017054W WO 2020116944 A1 WO2020116944 A1 WO 2020116944A1
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WO
WIPO (PCT)
Prior art keywords
electrode region
led
body portion
led elements
led lighting
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/KR2019/017054
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English (en)
Korean (ko)
Inventor
변동환
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
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Filing date
Publication date
Application filed by Individual filed Critical Individual
Publication of WO2020116944A1 publication Critical patent/WO2020116944A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K1/00—Printed circuits
    • H05K1/18—Printed circuits structurally associated with non-printed electric components
    • H05K1/182—Printed circuits structurally associated with non-printed electric components associated with components mounted in the printed circuit board, e.g. insert mounted components [IMC]
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V23/00—Arrangement of electric circuit elements in or on lighting devices
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V23/00—Arrangement of electric circuit elements in or on lighting devices
    • F21V23/003—Arrangement of electric circuit elements in or on lighting devices the elements being electronics drivers or controllers for operating the light source, e.g. for a LED array
    • F21V23/004—Arrangement of electric circuit elements in or on lighting devices the elements being electronics drivers or controllers for operating the light source, e.g. for a LED array arranged on a substrate, e.g. a printed circuit board
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K1/00—Printed circuits
    • H05K1/18—Printed circuits structurally associated with non-printed electric components
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K2201/00—Indexing scheme relating to printed circuits covered by H05K1/00
    • H05K2201/10—Details of components or other objects attached to or integrated in a printed circuit board
    • H05K2201/10007—Types of components
    • H05K2201/10106—Light emitting diode [LED]

Definitions

  • the present invention relates to an LED lighting substrate.
  • LEDs Light Emitting Diodes
  • LEDs are semiconductor devices that emit light composed of compounds such as gallium arsenide, and are basically composed of p-type and n-type semiconductor junctions. It is a device using a light emitting semiconductor that emits energy corresponding to the form of light.
  • Such LEDs have many advantages such as high output characteristics at low current requirements, quick response, long life, and a rigid package structure, and thus, their use is gradually increasing.
  • LED modules are known in which several LED elements are mounted on a substrate on a grid.
  • a package type LED element that is, an LED package, or a bare chip type LED element, that is, an LED chip is mounted.
  • various types of LED elements are mounted on the substrate at a desired pitch, number, and arrangement depending on the size, type, shape, use, or application device of the LED module.
  • the space between the plurality of LED elements arranged at a constant pitch does not require a particularly large substrate.
  • the substrate portion of the space between the LED elements is left intact without any special use, and thus there is a problem in that the substrate is ⁇ b''.
  • the technical problem to be achieved by the technical idea of the present invention is to provide an LED lighting substrate capable of minimizing the waste of the substrate while having equal lifespan, efficiency, and heat dissipation performance compared to a conventional LED lighting substrate.
  • the first body portion including a first electrode region and a second electrode region having a different polarity from each other, a second extending from the first body portion And a first element portion including a plurality of LED elements disposed on the branch portion and the second body portion, and a jumper portion.
  • the main body portion or the branch portion includes a first extension electrode region extending from the first electrode region and a second extension electrode region electrically connected to the second electrode region, and the jumper portion crosses the first electrode region.
  • the first electrode part electrically connects the second electrode region and the second extended electrode region, and the first element portion includes a plurality of element sets that constitute a plurality of LED elements connected in series with each other. The current flow directions of the adjacent device sets may be opposite to each other.
  • the first electrode region may be positioned between the second body portion and the second electrode region so as to face the second body portion.
  • the adjacent device set may share either the adjacent first extension electrode region or the second extension electrode region.
  • the device sets may be connected in parallel to each other.
  • the LED elements at both ends of the LED elements included in the element set may be electrically connected to the first extension electrode region and the second extension electrode region, respectively.
  • the number of the LED elements included in the element set, and the number of the LED elements disposed in each of the branch portions and the corresponding second body portion are the same, and the first extension electrode The region and the second extension electrode region may be located in the second body portion.
  • the branch portion includes a plurality of protruding regions protruding outward on both sides and a plurality of concave regions positioned between the protruding regions, and at least a portion of the plurality of LED elements is provided in the protruding regions. It can be arranged to form two rows.
  • the branch portion includes a plurality of protruding regions protruding outward on one side of both sides and a plurality of concave regions positioned between the protruding regions, and includes a straight region on the other side, and a plurality of At least a portion of the LED element may be arranged in two rows in the protruding area and the straight area corresponding thereto.
  • the second device part disposed on the first body part and including a plurality of LED devices connected in series with each other may be further included.
  • the number of the LED elements included in the second element portion and the number of the LED elements included in the element set may be the same.
  • the LED lighting substrate according to the embodiments of the present invention has a shape in which the branching part is branched and extended from the second main body, so that a plurality of LED lighting substrates can be manufactured through one mother substrate. Waste can be minimized.
  • the first extended electrode region extends from the first electrode region and the second extended electrode region is electrically connected to the second electrode region through a jumper portion, a plurality of LED elements are connected in series while Configuration is simple and efficient.
  • FIG. 1 is a plan view of an LED lighting substrate according to an embodiment of the present invention.
  • FIG. 2 is a cross-sectional view of the LED lighting substrate along the line A-A' shown in FIG. 1.
  • FIG. 3 is a plan view of an existing LED lighting substrate for comparison with the LED lighting substrate shown in FIG. 1.
  • FIG. 4 is a plan view showing a method of manufacturing the LED lighting substrate shown in FIG.
  • FIG. 5 is a plan view of an LED lighting substrate according to another embodiment of the present invention.
  • FIG. 6 is a plan view of an LED lighting substrate according to another embodiment of the present invention.
  • FIG. 1 is a plan view of an LED lighting substrate (100a) according to an embodiment of the present invention
  • Figure 2 is a cross-sectional view of the LED lighting substrate (100a) along the line A-A' shown in FIG.
  • the LED lighting substrate 100a according to the present embodiment will be described with reference to this.
  • the LED lighting substrate 100a includes a first body portion 110 and a first electrode region 111 and a second electrode region 112.
  • a set of elements includes a second body portion 120 extending from the body portion 110, a plurality of branch portions 130 branching from the second body portion 120, and a plurality of LED elements 141 connected in series with each other ( 142), but includes a first element portion 140 and a jumper portion 150 including a plurality of element sets 142, and current flow directions of adjacent element sets 142 may be opposite to each other.
  • the first main body portion 110 is a portion that becomes the main body of the LED lighting substrate 100a together with the second main body portion 120, and is plural from the base formed by the first main body portion 110 and the second main body portion 120.
  • the branch portion 130 of the branch has a shape that extends, the LED lighting substrate 100a may have a comb-like shape as a whole.
  • the second body portion 120 is a portion extending from the first body portion 110 and may be a portion substantially connected to the first body portion 110, and the plurality of branch portions 130 may include a second body portion. It may have a shape extending from the branch.
  • the first body portion 110 may include a first electrode region 111 and a second electrode region 112 having different polarities from each other.
  • the first body portion 110 includes a first electrode region 111 and a second electrode region 111 that are positive or negative polarities, or opposite polarities. It means that the electrode region 112 may be included.
  • the first electrode region 111 and the second electrode region 112 there are two places of the first electrode region 111 and the second electrode region 112, for example, power may be connected to both sides. When power is applied, the first electrode region 111 and the second electrode region 112 are applied. A current may flow between them.
  • the first electrode region 111 may be located in a region closest to the second body portion 120 of the first body portion 110, that is, a region facing the second body portion 120, and the second The electrode region 112 may be located behind it. Accordingly, the first electrode region 111 may be positioned between the second body portion 120 and the second electrode region 112 as a whole.
  • the second body part 120 or the branch part 130 may include a first extended electrode area 121 and a second extended electrode area 122.
  • first extension electrode region 121 is located in the second body portion 120 and the branch portion 130 and the second extension electrode region 122 is located in the branch portion 130
  • the first extension electrode region 121 and the second extension electrode region 122 may be located in the second body portion 120 or the branch portion 130 in various forms.
  • the first extended electrode region 121 may be physically extended from the first electrode region 111 and electrically connected to the first electrode region 111.
  • the second electrode region 112 since the second electrode region 112 is located behind the first electrode region 111, the second extended electrode region 122 cannot be physically connected to the second electrode region 112 in the same plane. Therefore, a different plane must be used to connect the second extended electrode region 122 and the second electrode region 112, as shown in FIG. 2, the jumper unit 150 crossing the first electrode region 111. ), the second extension electrode region 122 and the second electrode region 112 may be electrically connected.
  • the second electrode regions 112 may be electrically connected.
  • the first extended electrode region 121 may extend from a plurality of positions of the first electrode region 111, and the second extended electrode regions 122 may also be composed of a plurality, and each of the second electrode regions 112 may be formed. ) And may be electrically connected through a plurality of jumper parts 150.
  • the first extended electrode region 121 or the second extended electrode region 122 may have a tail part 123 connected to the branch 130 from the second body portion 120 for a long time, through which the first electrode The region 111 or the jumper 150 may be electrically connected.
  • each branch 130 is a shape including a plurality of protruding regions 131 selectively protruding toward the outside and a plurality of concave regions 132 positioned between the protruding regions 131 Can have This shape is to ensure the maximum distance between the LED elements 141 installed in the branch 130, the LED elements 141 are installed in the protruding region 131, not the concave region 132 in the same row. The distance between the positioned LED elements 141 can be secured as much as possible.
  • the protruding regions 131 and the concave regions 132 may be formed on both sides of the branch 130, and the LED elements 141 are respectively located in the protruding regions 131 on both sides.
  • the distance between the LED elements 141 arranged in two rows in one branch 130 may be secured as much as possible.
  • the first extension electrode region 121 or the second extension electrode region 122 may constitute at least a part of the protruding region 131 or the concave region 132 as shown in FIG. 1.
  • the first element unit 140 is a portion including a plurality of LED elements 141 disposed on the branching unit 130 and the second body unit 120, and the LED lighting substrate through the plurality of LED elements 141 ( 100a).
  • the LED element 141 included in the first element unit 140 may be arranged to constitute at least one column and a plurality of rows in the branch unit 130.
  • the LED element 141 is installed not only in the branch 130 but also in the second body portion 120, the portion of the second body portion 120 in the corresponding position of each branch portion 130,
  • the LED elements 141 constituting the same number of columns as the base 130 may be installed while forming one row.
  • the LED device 141 is horizontally connected to the second main body 120 so that the arrangement of the LED devices 141 forming one long row can be completed.
  • the LED elements 141 are arranged in two rows for each branch 130, but the present invention is not limited to this and is also arranged in one row or more than three rows. something to do.
  • the LED elements 141 included in the first element unit 140 may be connected in series to each other by a predetermined number, and the LED elements 141 connected in series may constitute the element set 142.
  • the plurality of device sets 142 may be connected in parallel. In this way, when a plurality of LED elements 141 are configured by combining series and parallel, circuit wiring can be very complicated.
  • the present invention extends the first extended electrode region 121 from the first electrode region 111 and extends the second extended electrode region 122 and the second electrode region 112 through the jumper 150.
  • each element set 142 is connected to the first extension electrode region 121 and the second extension electrode region 122, respectively, or in some cases, the first electrode region 111 and It may be directly connected to the second electrode region 112.
  • FIG. 1 shows that 14 LED elements 141 are connected in series to constitute the element set 142.
  • the first LED element 1411 extends from the first electrode region 111. 1 can be connected to the extended electrode region 121, and assuming the first electrode region 111 as an anode, current can be transferred to the first LED element 1411 through the first extended electrode region 121 as a conductor. .
  • the current transmitted through the LED element 1411 is through the main body of the branch 130 which is a conductor (the part represented by brown, yellow or green in the drawing is the conductive part, and the part represented by gray is the insulating part). It is delivered to the second LED element 1412, and in turn, may be delivered to the third LED element 1413, the fourth LED element 1414, and so on to the last 14 LED element 1415.
  • the current transmitted to the 14th LED element 1415 is transferred to the second extended electrode region 122 connected to the 14th LED element 1415 (assuming the second extended electrode region 122 is a cathode), and accordingly A device set 142 including a first electrode region 111, a first extended electrode region 121, and a first LED element 1411 to a 14th LED element 1415, a second extended electrode region 122, Current may flow to the jumper 150 and the second electrode region 112, and the LED element 141 of the device set 142 may emit light through the flow of the current.
  • the voltage applied to one LED element 141 in this embodiment is 3 V
  • 14 LED elements 141 are connected in series, it can be considered that a voltage of 42 V is applied to one element set 142. have.
  • the number of LED elements 141 constituting one element set 142 is described as 14, but the present invention is not limited thereto, and various number of LED elements such as 12, 15, 16, etc. It is possible to configure the device set 142 including the (141), it will be said that the present invention is not limited to the number of such LED devices 141 connected in series.
  • the adjacent device sets 142 may share either the adjacent first extension electrode region 121 or the second extension electrode region 122.
  • the A element set 1421 including the LED elements 1411 to 1414 of the LED elements 1415 is disposed adjacent to the B element set 1422 and the C element set 1423,
  • the first extension electrode region 121 may be shared with the B element set 1422, and the second extension electrode region 122 may be shared with the C element set 1423.
  • the A element set 1421 flows current in one direction (direction moving from right to left on the drawing) as current is transferred from LED #1411 to LED #1415.
  • the B element set 1422 shares the first extension electrode region 121 with the A element set 1421, and current flows in the other direction (the direction moving from left to right in the drawing) in the opposite direction.
  • the C element set 1423 shares the A element set 1421 and the second extension electrode region 122, and thus, current can flow in the other direction, which is the opposite direction. That is, the current flow directions of the adjacent device sets 142 may be opposite to each other, which allows the adjacent device sets 142 to share any one of the first extension electrode region 121 and the second extension electrode region 122. It may be because.
  • the device sets 142 since none of the device sets 142 share the same first extension electrode area 121 and the second extension electrode area 122, only one of them is shared, and the device sets 142 have different electrical paths. It can be seen as using. That is, although the LED elements 141 constituting the element set 142 are connected in series, it can be seen that different element sets 142 are connected in parallel. To this end, a plurality of first extension electrode regions 121 and a second extension electrode region 122 may be extended, and a plurality of jumper portions 150 corresponding thereto may also be provided.
  • the second element portion 160 including a plurality of LED elements 141 may be selectively provided. It may be deployed.
  • the number of LED elements 161 constituting the second element unit 160 may be the same as the number of LED elements 141 constituting the element set 142 of the first element unit 140. That is, for example, in FIG. 1, 14 LED elements 141 constituting one element set 142 are 14 and a voltage applied to the element set 142 is 42V, and the LED elements 161 constituting the second element part 160 are 161. 14), the voltage applied to the second element unit 160 may also be 42V. Therefore, even if the second device unit 160 is connected in parallel with another device set 142, it has no problem with the same voltage, and the LED is applied by applying the same voltage to both the device set 142 and the second device unit 160.
  • the lighting substrate 100a can be operated.
  • FIG. 3 is a plan view of an existing LED lighting substrate 10 for comparison with the LED lighting substrate 100a shown in FIG. 1, and FIG. 4 is a plan view showing a manufacturing method of the LED lighting substrate 100a shown in FIG. 1. .
  • the spatial efficiency of the LED lighting substrate 100a according to the present embodiment will be described with reference to this.
  • the LED lighting substrate 100a according to the present embodiment can minimize waste of the substrate.
  • the LED lighting substrate 100a according to the present embodiment is manufactured by cutting a single mother substrate 200 into a plurality, and for this purpose, the branch 130 is branched from the second main body 120.
  • the branch 130 is branched from the second main body 120.
  • the mother substrate 200 may be cut so that the branch 130 of the substrate 100a is positioned. Through this manufacturing method, it is possible to minimize the waste of the mother substrate 200, and it is possible to have a shape in which the branch 130 is branched by being manufactured through this manufacturing method.
  • each LED element 141 is installed in the protruding area 131 to open the distance between the LED elements 141 located in the same row. It can be spaced so as to approach the inter-distance, so that light can be spread uniformly without being locally concentrated.
  • each branch 130 may include both protruding areas 131 and concave areas 132 on both sides, and by placing LED elements 141 in each protruding areas 131, protruding areas of the same row ( The distance between the LED elements 141 located in the 131) can be secured as much as possible, and accordingly, the light can be uniformly spread in the LED lighting while saving the substrate as much as possible.
  • the substrate saving rate is 1-(152 ⁇ 291)/(125 ⁇ 275 ⁇ 2), which may reach about 36%.
  • the LED lighting substrate 100b according to the present embodiment has the first body part 110, the second body part 120, the branch part 130b, and the first as in the previous embodiment. Including the element unit 140 and the jumper unit 150, the shape of the branch unit 130b may be different from the previous embodiment.
  • the branching part 130b of the LED lighting substrate 100b may include a protruding area 131 and a concave area 132 on only one side of both sides, unlike the previous embodiment.
  • the side surface may include a straight region 133 without a protruding region 131 and a concave region 132.
  • the reason for placing the protruding region 131 and the concave region 132 only on one side of the branch 130b may be as follows.
  • the cutting may be difficult due to the large protruding area 131 when manufacturing the LED lighting substrate 100a by cutting the mother substrate.
  • both sides of the branch portion 130b are constituted by only the straight region 133 without the protruding region 131, it is difficult to realize the effect of minimizing the wasted substrate while ensuring the maximum distance between the LED elements 141 installed in the same row. .
  • the present embodiment has a protruding region 131 and a concave region 132 on one side, and the LED elements 141 are installed in the protruding regions 131, so that the LED elements 141 installed in the same row are disposed. It is possible to reduce the waste of the substrate while securing the maximum distance. Nevertheless, it is possible to easily cut the mother substrate during manufacture by placing a straight area 133 on the opposite side. That is, according to the present embodiment, manufacturing convenience (with a straight line area), reduction in manufacturing cost (minimization of substrate waste by utilizing the branch part), and uniform light security (to secure the distance between the LED elements installed in the same row as the projecting area) It is possible to effectively satisfy the compromise between the three effects.
  • this embodiment shows a case where 16 LED elements 141 are included in one element set 142b, and in this case, each element set (assuming that the voltage applied to one LED element 141 is 3V)
  • the voltage applied to 142b) can be considered as 48V.
  • the present invention is not limited to the number and voltage of the LED elements 141 included in the device set 142b.
  • the LED lighting substrate 100c includes a first body portion 110, a second body portion 120, a branch portion 130, a first element portion 140, and The jumper portion 150 may be included, but the first extension electrode region 121c and the second extension electrode region 122c may be positioned only in the second body portion 120.
  • the physical distance between the first extended electrode region 121c and the first electrode region 111 and the second extended electrode region 122c and the jumper portion 150 can be reduced, thereby minimizing resistance.
  • the heat dissipation area at the base 130 is widened, so that the heat dissipation performance of the LED lighting substrate 100c can be improved.
  • each device set 142c of the first device unit 140 includes 12 LED devices 141, and the branch unit 130 includes two columns and five rows of LED devices 141.
  • the branch unit 130 includes two columns and five rows of LED devices 141.
  • Is disposed and the LED elements 141 in two columns and one row are disposed in the second main body 120 corresponding thereto, and twelve LED elements 141 are disposed in an area corresponding to one branch 130. do. That is, the number of LED elements 141 located in one branch 130 and the corresponding second body portion 120 and the number of LED elements 141 included in the element set 142c are the same.
  • the LED elements 1411 and 12 LED elements 1416 which are the LED elements 141 at both ends of each element set 142c, may always be located in the second body portion 120, Accordingly, the first extension electrode region 121c connected to the No. 1 LED element 1411 and the second extension electrode region 122c connected to the No. 12 LED element 1416 may also be located in the second body portion 120. have. Accordingly, a physical distance between the first extended electrode region 121c and the first electrode region 111 and the second extended electrode region 122c and the jumper portion 150 may be closer, thereby improving convenience in manufacturing. And the effect of reducing resistance.
  • one element set 142c includes 12 LED elements 141 is described, but if you want to configure to include 10 LED elements 141, 2 columns 4 in the branch 130 The same effect can be obtained by arranging the LED elements 141 in two columns and one row in the part of the second main body 120 corresponding to the LED elements 141 in the row. That is, the present invention may not be limited to the number of such LED elements 141.
  • LED lighting substrates 100a, 100b, and 100c are illustrated and described in a square shape, but it will be understood by those skilled in the art that the present invention can be applied to a circular lighting substrate.
  • It can be used in printed circuit boards and similar fields for LED lighting in offices, factories, and residential spaces.

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  • Engineering & Computer Science (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • General Engineering & Computer Science (AREA)
  • Non-Portable Lighting Devices Or Systems Thereof (AREA)
  • Fastening Of Light Sources Or Lamp Holders (AREA)

Abstract

Un substrat d'éclairage à DEL selon un aspect correspondant à l'idée technique de la présente invention comprend: une première partie de corps comprenant une première région d'électrodes et une seconde région d'électrodes ayant des polarités électriquement différentes l'une de l'autre; une seconde partie de corps s'étendant à partir de la première partie de corps; une partie de dérivation à dérivation multiple et qui s'étend à partir de la seconde partie de corps; une première partie d'éléments comprenant une pluralité d'éléments de DEL disposés dans la partie de dérivation et la seconde partie de corps; et une partie de raccordement, la seconde partie de corps ou la partie de dérivation comprenant une première région d'électrodes d'extension s'étendant à partir de la première région d'électrodes et une seconde région d'électrodes d'extension connectée électriquement à la seconde région d'électrodes, la partie de raccordement se connecte électriquement entre la seconde région d'électrodes et la seconde région d'électrodes d'extension à travers la première région d'électrodes, la première partie d'éléments comprend une pluralité d'ensembles d'éléments qui configurent la pluralité d'éléments de DEL connectés l'un à l'autre en série en tant qu'ensemble d'éléments, et les sens de passage du courant d'ensembles d'éléments adjacents sont opposées l'un à l'autre. L'invention concerne un substrat d'éclairage à DEL qui simplifie la connexion du circuit à travers la première région d'électrodes d'extension et la seconde région d'électrodes d'extension tout en réduisant au minimum les pertes de substrat par la partie de dérivation.
PCT/KR2019/017054 2018-12-05 2019-12-05 Substrat d'éclairage à del Ceased WO2020116944A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
KR10-2018-0155142 2018-12-05
KR1020180155142A KR102186812B1 (ko) 2018-12-05 2018-12-05 Led 조명기판

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WO2020116944A1 true WO2020116944A1 (fr) 2020-06-11

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EP4465124A4 (fr) 2022-07-26 2025-06-11 Samsung Electronics Co., Ltd. Appareil d'affichage et dispositif de source de lumière associé

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KR20150072799A (ko) * 2013-12-20 2015-06-30 엘지이노텍 주식회사 회로기판 및 조명 장치

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