WO2021137463A1 - 양면 유기발광 디스플레이장치 - Google Patents
양면 유기발광 디스플레이장치 Download PDFInfo
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- WO2021137463A1 WO2021137463A1 PCT/KR2020/018004 KR2020018004W WO2021137463A1 WO 2021137463 A1 WO2021137463 A1 WO 2021137463A1 KR 2020018004 W KR2020018004 W KR 2020018004W WO 2021137463 A1 WO2021137463 A1 WO 2021137463A1
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- Prior art keywords
- electrode layer
- image
- organic light
- pattern
- light emitting
- Prior art date
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- 239000000758 substrate Substances 0.000 claims description 27
- 239000011521 glass Substances 0.000 claims description 16
- 239000010409 thin film Substances 0.000 claims description 16
- 239000002184 metal Substances 0.000 claims description 6
- 238000007639 printing Methods 0.000 claims description 5
- 238000005538 encapsulation Methods 0.000 description 8
- 238000002347 injection Methods 0.000 description 4
- 239000007924 injection Substances 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 238000000059 patterning Methods 0.000 description 3
- 239000004642 Polyimide Substances 0.000 description 2
- 239000004020 conductor Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000001788 irregular Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000007769 metal material Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 239000011368 organic material Substances 0.000 description 2
- 229920001721 polyimide Polymers 0.000 description 2
- 229920003002 synthetic resin Polymers 0.000 description 2
- 239000000057 synthetic resin Substances 0.000 description 2
- 239000003086 colorant Substances 0.000 description 1
- 238000000151 deposition Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000005525 hole transport Effects 0.000 description 1
- 238000007641 inkjet printing Methods 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 238000004528 spin coating Methods 0.000 description 1
- 230000002194 synthesizing effect Effects 0.000 description 1
- 238000002834 transmittance Methods 0.000 description 1
- 239000012780 transparent material Substances 0.000 description 1
- 238000007740 vapor deposition Methods 0.000 description 1
Images
Classifications
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K59/00—Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
- H10K59/10—OLED displays
- H10K59/12—Active-matrix OLED [AMOLED] displays
- H10K59/128—Active-matrix OLED [AMOLED] displays comprising two independent displays, e.g. for emitting information from two major sides of the display
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K50/00—Organic light-emitting devices
- H10K50/80—Constructional details
- H10K50/805—Electrodes
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K50/00—Organic light-emitting devices
- H10K50/80—Constructional details
- H10K50/85—Arrangements for extracting light from the devices
- H10K50/856—Arrangements for extracting light from the devices comprising reflective means
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K59/00—Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
- H10K59/80—Constructional details
- H10K59/805—Electrodes
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K2102/00—Constructional details relating to the organic devices covered by this subclass
- H10K2102/301—Details of OLEDs
- H10K2102/302—Details of OLEDs of OLED structures
- H10K2102/3023—Direction of light emission
- H10K2102/3031—Two-side emission, e.g. transparent OLEDs [TOLED]
Definitions
- the present invention relates to a double-sided organic light emitting display device capable of displaying an image from both sides.
- a display device is a device for displaying an image, and the display device displays an image only on one side.
- the conventional double-sided display device blanks the pixels in a random pattern so that the image displayed by some pixels is not visible on one side of the display panel and performs blanking, and blanking means is installed on the remaining pixels that are not blanked.
- An image displayed in pixels subjected to blanking and an image displayed in pixels not subjected to blanking could be displayed on both sides of the display panel.
- the conventional double-sided display device has a problem in that the blank means is installed on the outer surface of the display panel, so that the blank means is easily damaged, and the image displayed on both sides becomes unclear as the blank means is damaged.
- the present invention has been devised to solve the above problems, and the problem to be solved by the present invention is not only to prevent the occurrence of the moire interference phenomenon, but also to prevent damage to the blank means and provide a clear image.
- An object of the present invention is to provide an organic light emitting display device.
- a double-sided organic light emitting display device for achieving the above object includes a first electrode layer emitting electrons, a second electrode layer emitting holes and disposed to be perpendicular to the first electrode layer, and the first electrode layer and and an organic light emitting layer disposed between the second electrode layers and emitting light by forming the plurality of pixels by collision of the electrons and the holes at an intersection of the first electrode layer and the second electrode layer, wherein the plurality of pixels
- the light passing through the first electrode layer or the second electrode layer is reflected in the opposite direction to display the first image on one surface with this arbitrary pattern and display the second image on the other surface with the pattern inverted with respect to the arbitrary pattern and a reflector unit formed in the arbitrary pattern or a pattern inverted with respect to the arbitrary pattern.
- the first electrode layer or the second electrode layer may be formed as a transparent electrode to transmit light reflected from the reflector unit.
- the reflector part may be formed by attaching or printing a metal thin film formed in the arbitrary pattern or a pattern inverted to the arbitrary pattern to the first electrode layer or the second electrode layer.
- the arbitrary pattern may be irregularly formed in order to reduce the Moire interference phenomenon.
- the reflector unit may attach or print a metal thin film to the glass substrate in the arbitrary pattern or in an inverted pattern with respect to the arbitrary pattern.
- the reflector may be implemented as a half-mirror that transmits a portion of the light and reflects the remaining portion.
- the pixel corresponding to the arbitrary pattern and the pixel corresponding to the inverted pattern with respect to the arbitrary pattern may include an image controller for controlling an image signal to display inverted images or different images.
- a reflector part that reflects light on the first electrode layer or the second electrode layer by forming a reflector part that reflects light on the first electrode layer or the second electrode layer, different images can be displayed on both sides, and the reflector part is not exposed to the outside, thereby preventing damage to the reflector part and providing a clear image. can be displayed
- a decrease in resolution can be prevented by forming the reflector part as a half mirror, and the occurrence of a moire interference phenomenon can be prevented by irregularly forming an arbitrary pattern of the reflector part.
- FIG. 1 is a perspective view schematically illustrating a double-sided organic light emitting display device according to a first embodiment of the present invention.
- FIG. 2 is a front view illustrating a first image displayed on one side of the double-sided organic light emitting display device according to the first embodiment of the present invention.
- FIG 3 is a front view illustrating a second image displayed on the other surface of the double-sided organic light emitting display device according to the first embodiment of the present invention.
- FIG. 4 is a partial cross-sectional view of a double-sided organic light emitting display device according to a first embodiment of the present invention, and is a view showing a reflector unit as an example.
- FIG. 5 is a partial cross-sectional view of a double-sided organic light emitting display device according to a first embodiment of the present invention, and is a view showing a reflector unit according to another example.
- FIG. 6 is a partial cross-sectional view of a double-sided organic light emitting display device according to a first embodiment of the present invention, and is a view showing a reflector unit according to another example.
- FIG. 7 is a diagram schematically illustrating an image provided by the image controller of the double-sided organic light emitting display device according to the first embodiment of the present invention.
- FIG. 8 is a partial cross-sectional view of a double-sided organic light emitting display device according to a second embodiment of the present invention, illustrating a reflector unit.
- FIG. 9 is a partial cross-sectional view of a double-sided organic light emitting display device according to a second embodiment of the present invention, and is a view showing a modified example of the reflector unit.
- first electrode layer 120 second electrode layer
- organic light emitting layer 140 thin film transistor substrate
- transistor 150 glass substrate
- the double-sided organic light emitting display apparatus 100 may display a first image 1st on one surface 101 and a second image 2nd on the other surface 102 .
- the first image 1st and the second image 2nd may be different images, and the first image 1st and the second image 2nd may be the same but opposite images, or the same images that are not opposite to each other. have.
- the double-sided organic light emitting display device 100 may include a first electrode layer 110 and a second electrode layer 120 .
- the first electrode layer 110 may emit electrons, and the first electrode layer 110 may include a plurality of fine conductive wires spaced apart from each other in parallel, and the conductive wires may be formed of a conductive material to emit electrons. have.
- the first electrode layer 110 may be configured in a form in which conductive wires are deposited on a thin film.
- the first electrode layer 110 may have a form in which an electron injection layer into which electrons generated from the first electrode layer 110 are injected and an electron transport layer into which electrons injected into the electron injection layer move are combined.
- the second electrode layer 120 may emit holes, and the second electrode layer 120 may include a plurality of fine conductive wires spaced apart from each other in parallel, and the conductive wires may be formed of a conductive material to emit holes. have.
- the conductive wires of the second electrode layer 120 may be installed to cross each other orthogonally to the conductive wires of the first electrode layer 110 .
- the second front layer may have a form in which a hole injection layer into which holes are injected and a hole transport layer into which holes injected into the hole injection layer move are combined.
- the first electrode layer 110 emits electrons and the second electrode layer 120 emits holes
- the first electrode layer 110 emits holes
- the first electrode layer 110 emits electric charges. It can also be configured to emit
- any one of the first electrode layer 110 and the second electrode layer 120 is a gate line
- the other is implemented as a gate line so that the pixel 105 receives an image signal through the gate line and the data line so that the pixel 105 emits light. can be controlled.
- the double-sided organic light emitting display device 100 may include an organic light emitting layer 130 .
- the organic light emitting layer 130 may be disposed between the first electrode layer 110 and the second electrode layer 120 , and the organic light emitting layer 130 includes electrons emitted from the first electrode layer 110 and the second electrode layer 120 . Holes emitted from the can collide with each other and emit light.
- the organic light emitting layer 130 may be formed of a low molecular or high molecular organic material, and the organic light emitting layer 130 is formed by a vapor deposition method (patterning method) or inkjet printing (spin casting) method to form a first electrode layer 110 and a second electrode layer. It may be located between 120 .
- the intersecting portion of the electrode of the first electrode layer 110 and the electrode of the second electrode layer 120 may constitute a pixel 105 that emits light to display an image, and the electrode of the first electrode layer 110 . Since the and second electrode layers 120 have a plurality of intersection points, an image can be displayed by a plurality of pixels 105 .
- one pixel 105 may express all of the R, G, and B colors.
- Either or both of the first electrode layer 110 and the second electrode layer 120 may be formed of a transparent electrode (ITO) that transmits light.
- ITO transparent electrode
- the double-sided organic light emitting display device 100 may include a thin film transistor substrate 140 .
- the thin film transistor substrate 140 is overlapped with the first electrode layer 110 or the second electrode layer 120 to supply or block current to control light emission from the organic light emitting layer 130 .
- the thin film transistor substrate 140 may be configured by mounting a plurality of transistors 145 on a thin film sheet, and the transistor 145 is a pixel 105 in which the first electrode layer 110 and the second electrode layer 120 intersect. Each pixel 105 may be positioned to control light emission from each pixel 105 .
- the thin film transistor substrate 140 may be installed by being attached to the glass substrate 150 , and on the outermost surface of a position opposite to the glass substrate 150 , an encapsulation for sealing the organic light emitting layer 130 together with the glass substrate 150 .
- the layer 170 may be formed, and the encapsulation layer 170 may be formed by overlapping a transparent glass substrate 150 or a flexible synthetic resin substrate, or directly formed by a polymer synthetic resin.
- the thin film transistor substrate 140 is described as being attached to the glass substrate 150, but the glass substrate 150 is replaced with a flexible polyimide (PI) substrate to provide a flexible double-sided display device. can also be implemented.
- PI polyimide
- the double-sided organic light emitting display apparatus 100 may include a reflector unit 160 .
- the reflector unit 160 reflects the light of the organic light emitting layer 130 in the opposite direction in which light is emitted in order to display the image emitted from the organic light emitting layer 130 to display the image on the surface in the opposite direction to the surface for displaying the image. can be displayed.
- the reflector unit 160 reflects the light emitted from the pixel 105 positioned in a preset random pattern among all the pixels 105 in a direction opposite to the direction for displaying the image. may display an image through the other surface 102 .
- the reflector unit 160 may be formed on any one of the first electrode layer 110 and the second electrode layer 120 .
- the reflector unit 160 when configured to reflect light through the plurality of pixels 105 in a mosaic pattern, the image is displayed in the portion where the reflector unit 160 is not formed, and the portion covered by the mosaic. Since the image is reflected and the image is transmitted and displayed in the opposite direction to the direction for displaying the image, the image can be displayed from both sides.
- the image is transmitted and displayed, and in the pixel 105 where the reflector unit 160 is located, the image is reflected in the opposite direction to the direction for displaying the image.
- the image is not displayed on the side where the image is to be displayed, the image can be displayed by reflecting light in the opposite direction.
- any one pixel 105 of the plurality of pixels 105 is transmitted to display an image, and the pixel 105 adjacent to any one pixel 105 is formed by the reflector unit 160 .
- Light emitted from some pixels 105 among the plurality of pixels 105 may be reflected in the opposite direction regularly or irregularly so as to be reflected in the opposite direction.
- the reflector unit 160 When an electrode is formed on any one of the first electrode layer 110 and the second electrode layer 120, the reflector unit 160 is reflected by patterning it with a metal material in an arbitrary pattern, and the remaining portion is made of a transparent material. It can also be configured to be transmitted by patterning.
- the reflector unit 160 in another example is formed in a random pattern on the first electrode layer 110 , it is formed on the second electrode layer 120 in an inverted pattern with respect to the random pattern to form an organic material.
- another example of the reflector unit 160 is in the form of printing or attaching a reflective material formed in an arbitrary pattern on the outer surface of the first electrode layer 110 or the second electrode layer 120 .
- the reflective material may be a metallic material.
- a moire interference phenomenon may occur due to mutual interference with adjacent pixels 105 , but when formed in an irregular arrangement, adjacent pixels 105 are formed in an irregular arrangement. ), it is possible to prevent the occurrence of moire interference by preventing mutual interference.
- the reflector unit 160 is configured in the form of a half-mirror so that some of the polarized light is transmitted, and the rest of the polarized light is reflected, so that the reflector unit 160 does not completely block the light in the formed part, but some light. By transmitting, it is possible to prevent a decrease in resolution by minimizing a portion covered by an arbitrary pattern by the reflector unit 160 .
- the reflector unit 160 since some light is transmitted by the reflector unit 160, a decrease in resolution can be prevented, but it is reflected by the reflector unit 160 to display the image. Since only some polarized light is transmitted from the other surface 102 , the illuminance may decrease.
- Any pattern of the reflector unit 160 may be implemented in various forms, such as alternately reflecting horizontal lines, alternately reflecting vertical lines, forming a mosaic shape, or forming an arbitrary pattern shape. .
- the double-sided organic light emitting display apparatus 100 may include an image controller.
- the image controller may control the image signal to display the first image 1st on one surface 101 of the double-sided organic light emitting display apparatus 100 and display the second image 2nd on the other surface 102 .
- the first image 1st is a pixel ( 105 may control an image signal provided to each pixel 105 to display an image.
- the second image 2nd may control an image signal provided to each pixel 105 to display an image in the pixel 105 corresponding to an arbitrary pattern of the reflector unit 160 .
- the image controller displays the first image 1st and the second image 2nd on both sides according to the synthesized image signal. configurable.
- the image of the pixel 105 located in the arbitrary pattern is removed from the pixel 105 of the first image 1st corresponding to the arbitrary pattern of the reflector unit 160 , and the removed pixel 105 is removed.
- the pixels 105 of the second image 2nd corresponding to It can also be configured to display other images.
- a thin film transistor substrate 140 is laminated on an upper surface of a glass substrate 150 , and a first method for emitting holes on the thin film transistor substrate 140 .
- the second electrode layer 120 is stacked, and the organic light emitting layer 130 is stacked on the upper surface of the second electrode layer 120 .
- the first electrode layer 110 emitting electrons is stacked on the upper surface of the organic light emitting layer 130 , and the encapsulation layer 170 is selectively formed on the upper surface of the first electrode layer 110 , or an encapsulation substrate can be stacked have.
- the second electrode layer 120 and the first electrode layer 110 may have light transmittance, and the reflector unit 160 may be formed on any one of the first electrode layer 110 and the second electrode layer 120 .
- a reflector unit 160 that reflects light from some of the pixels 105 in an arbitrary pattern among the plurality of pixels 105 in the opposite direction for displaying an image ) is formed.
- the reflector unit 160 is formed in the second electrode layer 120 in the embodiment, the reflector unit 160 is also formed in the first electrode layer 110 in an inverted pattern with respect to the arbitrary pattern of the second electrode layer 120 . may be
- each pixel 105 emits light to display an image.
- An image is displayed on one surface 101 of the double-sided organic light emitting display apparatus 100, and light is reflected in the opposite direction in the pixel 105 corresponding to the arbitrary pattern of the reflector unit 160, and the first electrode layer 110.
- the image is displayed through the
- the double-sided organic light emitting display apparatus 100 can display the image on both sides by reflecting the image in a direction opposite to the direction for displaying the image by the reflector unit 160 .
- the double-sided organic light emitting display apparatus 100 is characterized by the reflector unit 160'.
- the reflector unit 160 ′ of the second embodiment has an encapsulation layer 170 or a glass substrate 150 to cover some pixels 105 among all pixels 105 in an arbitrary pattern. can be formed in
- the reflector unit 160' reflects the light emitted from the organic light emitting layer 130 in a direction opposite to the original emission direction, and emits the image through the other surface 102 opposite to the one surface 101 for displaying the image. can do.
- the reflector unit 160 ′ may be formed in the form of depositing or printing a metal thin film in an arbitrary pattern on the encapsulation layer 170 or the glass substrate 150 , or attaching a metal thin film sheet formed in an arbitrary pattern.
- the reflector unit 160 ′ may be formed on the glass substrate 150 in an arbitrary pattern, and may also be formed in the encapsulation layer 170 in an inverted pattern with respect to the arbitrary pattern. have.
- the light positioned in the pixel 105 corresponding to an arbitrary pattern of the reflector unit 160' is reflected in the opposite direction to the image display direction to display the image. image can be displayed.
- the double-sided organic light emitting display apparatus 100 can display the image on both sides by reflecting the image in a direction opposite to the direction for displaying the image by the reflector unit 160 ′. .
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- Electroluminescent Light Sources (AREA)
Abstract
Description
Claims (7)
- 전자를 방출하는 제1 전극층,정공을 방출하며 제1 전극층과 직교되도록 배치되는 제2 전극층,상기 제1 전극층과 상기 제2 전극층의 사이에 배치되며 상기 제1 전극층과 상기 제2 전극층의 교차되는 부분에서 상기 전자와 상기 정공의 충돌에 의해 상기 복수 개의 픽셀을 이뤄 발광하는 유기발광층, 및상기 복수 개의 픽셀이 임의의 패턴으로 일면에서 제1 영상을 표시하고, 상기 임의의 패턴에 대해 반전된 패턴으로 타면에서 제2 영상을 표시하도록 상기 제1 전극층 또는 상기 제2 전극층을 투과하는 빛을 반대방향으로 반사시키는 상기 임의의 패턴 또는 상기 임의의 패턴에 대해 반전된 패턴으로 형성되는 리플렉터부를 포함하는 특징으로 하는 양면 유기발광 디스플레이장치.
- 제1항에 있어서,상기 제1 전극층 또는 상기 제2 전극층은상기 리플렉터부에서 반사되는 빛을 투과하도록 투명전극으로 형성되는 것을 특징으로 하는 양면 유기발광 디스플레이장치.
- 제1항에 있어서,상기 리플렉터부는상기 제1 전극층 또는 상기 제2 전극층에 상기 임의의 패턴 또는 상기 임의의 패턴에 대해 반전된 패턴으로 형성된 금속박막을 부착 또는 인쇄하여 형성하는 것을 특징으로 하는 양면 유기발광 디스플레이장치.
- 제1항에 있어서,상기 임의의 패턴은무아레 간섭 현상을 감소시키기 위해 불규칙적으로 형성되는 것을 특징으로 하는 양면 유기발광 디스플레이장치.
- 제1항에 있어서,상기 제1 전극층 또는 상기 제2 전극층을 보호하는 유리기판을 포함하며,상기 리플렉터부는 상기 임의의 패턴 또는 상기 임의의 패턴에 대해 반전된 패턴으로 상기 유리기판에 금속박막을 부착 또는 인쇄하는 것을 특징으로 하는 양면 유기발광 디스플레이장치.
- 제1항에 있어서,상기 리플렉터부는빛의 일부는 투과시키고, 나머지 일부는 반사시키는 하프미러로 구현되는 것을 특징으로 하는 양면 유기발광 디스플레이장치.
- 제1항에 있어서,상기 복수 개의 픽셀에서 상기 임의의 패턴과 대응되는 픽셀과 상기 임의의 패턴에 대해 반전된 패턴과 대응되는 픽셀은 서로 반전된 영상 또는 서로 다른 영상을 표시하도록 영상신호를 제어하는 영상컨트롤러를 포함하는 양면 유기발광 디스플레이장치.
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP20908848.3A EP4086966A4 (en) | 2019-12-31 | 2020-12-10 | DOUBLE-SIDED ORGANIC LIGHT EMITTING DISPLAY DEVICE |
US17/785,094 US20220376021A1 (en) | 2019-12-31 | 2020-12-10 | Double-sided organic light-emitting display device |
AU2020418251A AU2020418251A1 (en) | 2019-12-31 | 2020-12-10 | Double-sided organic light-emitting display device |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
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KR1020190179480A KR102393571B1 (ko) | 2019-12-31 | 2019-12-31 | 양면 유기발광 디스플레이장치 |
KR10-2019-0179480 | 2019-12-31 |
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WO2021137463A1 true WO2021137463A1 (ko) | 2021-07-08 |
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PCT/KR2020/018004 WO2021137463A1 (ko) | 2019-12-31 | 2020-12-10 | 양면 유기발광 디스플레이장치 |
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US (1) | US20220376021A1 (ko) |
EP (1) | EP4086966A4 (ko) |
KR (1) | KR102393571B1 (ko) |
AU (1) | AU2020418251A1 (ko) |
WO (1) | WO2021137463A1 (ko) |
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KR101511117B1 (ko) | 2014-01-07 | 2015-04-10 | 주식회사 토비스 | 양면 디스플레이장치 |
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US20220376021A1 (en) | 2022-11-24 |
EP4086966A1 (en) | 2022-11-09 |
EP4086966A4 (en) | 2024-01-17 |
AU2020418251A1 (en) | 2022-07-14 |
KR102393571B1 (ko) | 2022-05-03 |
KR20210085909A (ko) | 2021-07-08 |
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