Patents by Inventor Loganathan Murugan
Loganathan Murugan has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 11973068Abstract: A micro LED display device includes: a substrate; a plurality of micro light-emitting diodes disposed on the substrate; and a reflective layer and a black layer sequentially stacked on the substrate. The reflective layer and the black layer cover a surface of the substrate, wherein a top surface of the plurality of micro light-emitting diodes is exposed through the reflective layer and the black layer. A plurality of reflective banks and a plurality of black banks are sequentially disposed on the black layer and exposing the plurality of micro light-emitting diodes; and a color-conversion material covers the top surface of at least one of the plurality of micro light-emitting diodes. The color-conversion material is laterally disposed between the plurality of reflective banks. The reflective layer, the black layer, the plurality of reflective banks, and the plurality of black banks overlap each other in a display direction.Type: GrantFiled: October 28, 2021Date of Patent: April 30, 2024Assignee: PLAYNITRIDE DISPLAY CO., LTD.Inventors: Loganathan Murugan, Sheng-Yuan Sun, Po-Wei Chiu
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Publication number: 20240096856Abstract: A micro LED display device includes: a substrate; a plurality of micro light-emitting diodes disposed on the substrate; and a reflective layer and a black layer sequentially stacked on the substrate. The reflective layer and the black layer cover a surface of the substrate, wherein a top surface of the plurality of micro light-emitting diodes is exposed through the reflective layer and the black layer. A plurality of reflective banks and a plurality of black banks are sequentially disposed on the black layer and exposing the plurality of micro light-emitting diodes; and a color-conversion material covers the top surface of at least one of the plurality of micro light-emitting diodes. The color-conversion material is laterally disposed between the plurality of reflective banks. The reflective layer, the black layer, the plurality of reflective banks, and the plurality of black banks overlap each other in a display direction.Type: ApplicationFiled: November 29, 2023Publication date: March 21, 2024Applicant: PlayNitride Display Co., Ltd.Inventors: Loganathan MURUGAN, Sheng-Yuan SUN, Po-Wei CHIU
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Patent number: 11935985Abstract: A micro light-emitting diode (LED) display panel including a substrate, a first micro LED, a first light-shielding wall, a second micro LED, and a second light-shielding wall is provided. The substrate includes a plurality of pixel regions arranged in an array. The first micro LED is disposed on one of the pixel regions of the substrate. The first light-shielding wall is disposed on the substrate and located beside the first micro LED. The second micro LED is disposed on the one of the pixel regions of the substrate and located beside the first micro LED. The second light-shielding wall is disposed on the substrate and located beside the second micro LED. A light wavelength of the first micro LED is different from a light wavelength of the second micro LED. A height of the first light-shielding wall is smaller than a height of the second light-shielding wall.Type: GrantFiled: August 23, 2021Date of Patent: March 19, 2024Assignee: PlayNitride Display Co., Ltd.Inventors: Sheng-Yuan Sun, Loganathan Murugan, Po-Wei Chiu
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Patent number: 11923399Abstract: A micro light-emitting diode display panel includes a substrate, at least one light-emitting element, a reflective layer and a light-absorbing layer. The at least one light-emitting element is disposed on the substrate to define at least one pixel, and each light-emitting element includes micro light-emitting diodes. The reflective layer is disposed on the substrate and located between the micro light-emitting diodes. The reflective layer has cavities surrounding the micro light-emitting diodes, such that a thickness of a portion of the reflective layer close to any one of the micro light-emitting diodes is greater than a thickness of a portion of the reflective layer away from the corresponding micro light-emitting diode. The light-absorbing layer is at least disposed in the cavities of the reflective layer.Type: GrantFiled: March 31, 2021Date of Patent: March 5, 2024Assignee: PlayNitride Display Co., Ltd.Inventors: Sheng-Yuan Sun, Loganathan Murugan, Po-Wei Chiu, Yun-Li Li
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Patent number: 11916170Abstract: A micro-light-emitting diode chip includes an epitaxial structure, an electrode, a transparent structure, and a reflection layer. The epitaxial structure has a light exit surface, a back surface opposite to the light exit surface, and a sidewall surface. The sidewall surface is connected to the light exit surface and the back surface. The electrode is electrically coupled to the epitaxial structure. The transparent structure has an inner surface and an outer surface opposite to the inner surface. The inner surface is connected to the sidewall surface. A distance between the outer surface and the inner surface on a plane where the back surface is located is less than a distance between the outer surface and the inner surface on a plane where the light exit surface is located. The reflection layer is in direct contact with the outer surface. A micro-light-emitting diode display is also provided.Type: GrantFiled: September 13, 2021Date of Patent: February 27, 2024Assignee: PlayNitride Display Co., Ltd.Inventors: Sheng-Yuan Sun, Loganathan Murugan, Po-Wei Chiu
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Publication number: 20230395759Abstract: A display panel includes a pixel unit. The pixel unit includes a first sub-pixel and a second sub-pixel. The first sub-pixel includes a first light-emitting element, a first light source element, and a first color conversion structure. A light emitted by the first light-emitting element has a first color. The first color conversion structure is disposed on the first light source element and adapted to convert a light emitted by the first light source element into a light of the first color. The second sub-pixel includes a second light-emitting element. A light emitted by the second light-emitting element has a second color different from the first color.Type: ApplicationFiled: June 1, 2022Publication date: December 7, 2023Applicant: PlayNitride Display Co., Ltd.Inventors: LOGANATHAN MURUGAN, Sheng-Yuan Sun, Po-Wei Chiu
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Patent number: 11776990Abstract: A micro light-emitting diode display panel including first and second substrates, micro light-emitting diodes, a wavelength conversion layer, a light-shielding pattern layer, a light filter layer, and an air gap is provided. The micro light-emitting diodes are disposed on the first substrate and respectively located in a plurality of sub-pixel areas. The micro light-emitting diodes are adapted to emit a light beam. The wavelength conversion layer is overlapped with at least a portion of the micro light-emitting diodes. The light beam is used to excite the wavelength conversion layer to emit a converted light beam. The light filter layer is disposed between the wavelength conversion layer and the second substrate and overlapped with the micro light-emitting diodes. The air gap is disposed between any two adjacent ones of any one of the micro light-emitting diodes, the second substrate, the wavelength conversion layer, and the light filter layer.Type: GrantFiled: November 29, 2021Date of Patent: October 3, 2023Assignee: PlayNitride Display Co., Ltd.Inventors: Sheng-Yuan Sun, Po-Wei Chiu, Loganathan Murugan
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Publication number: 20230231001Abstract: A micro light-emitting diode display device includes a display substrate, multiple pixels, and at least one color conversion layer. The pixels are disposed on the display substrate. Each of the pixels includes multiple sub-pixels. Each of the sub-pixels includes at least one micro light-emitting diode. The at least one color conversion layer is disposed on the pixels. The at least one color conversion layer is continuously disposed on at least a part of sub-pixels of different pixels along a same direction.Type: ApplicationFiled: March 16, 2022Publication date: July 20, 2023Applicant: PlayNitride Display Co., Ltd.Inventors: Sheng-Yuan Sun, LOGANATHAN MURUGAN, Po-Wei Chiu
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Publication number: 20230154901Abstract: A display panel and a manufacturing method thereof are provided. The display panel includes a circuit substrate and a plurality of micro light-emitting diode structures. The micro light-emitting diode structures each include a micro light-emitting chip and a molding structure. The micro light-emitting chip is electrically bonded to the circuit substrate, and includes a first surface, a second surface, and a peripheral surface. The first surface is located on a side of the micro light-emitting chip facing the circuit substrate. The second surface is disposed opposite to the first surface. The peripheral surface connects the first surface and the second surface. The molding structure surrounds the peripheral surface and encloses the second surface of the micro light-emitting chip. The molding structure extends in a direction away from the circuit substrate and forms an inner side wall. The inner side wall and the second surface constitute an accommodating portion.Type: ApplicationFiled: January 6, 2022Publication date: May 18, 2023Applicant: PlayNitride Display Co., Ltd.Inventors: Shiang-Ning Yang, Sheng-Yuan Sun, LOGANATHAN MURUGAN, Yu-Yun Lo, Bo-Wei Wu
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Publication number: 20230135465Abstract: A micro LED display device includes: a substrate; a plurality of micro light-emitting diodes disposed on the substrate; and a reflective layer and a black layer sequentially stacked on the substrate. The reflective layer and the black layer cover a surface of the substrate, wherein a top surface of the plurality of micro light-emitting diodes is exposed through the reflective layer and the black layer. A plurality of reflective banks and a plurality of black banks are sequentially disposed on the black layer and exposing the plurality of micro light-emitting diodes; and a color-conversion material covers the top surface of at least one of the plurality of micro light-emitting diodes. The color-conversion material is laterally disposed between the plurality of reflective banks. The reflective layer, the black layer, the plurality of reflective banks, and the plurality of black banks overlap each other in a display direction.Type: ApplicationFiled: October 28, 2021Publication date: May 4, 2023Applicant: PlayNitride Display Co., Ltd.Inventors: Loganathan MURUGAN, Sheng-Yuan SUN, Po-Wei CHIU
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Publication number: 20230033031Abstract: A micro LED display device includes an epitaxial structure layer, a connection layer, a light conversion layer and a transparent layer. The epitaxial structure layer includes a plurality of micro LEDs disposed apart from each other. The connection layer is disposed at one side of the epitaxial structure layer away from the micro LEDs. The light conversion layer is fixed on the epitaxial structure layer through the connection layer and includes a plurality of light conversion portions. Each of the light conversion portions corresponds to one of the micro LEDs. The transparent layer is disposed at one side of the light conversion layer away from the epitaxial structure layer. The ratio of the thickness of the transparent layer to the width of each light conversion portion is between 0.1 and 40. A manufacturing method of the micro LED display device is also provided.Type: ApplicationFiled: November 3, 2021Publication date: February 2, 2023Inventors: Yen-Yeh CHEN, YU-JUI TSENG, SHENG-YUAN SUN, LOGANATHAN MURUGAN, PO-WEI CHIU
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Publication number: 20220336526Abstract: A micro light-emitting diode display panel including first and second substrates, micro light-emitting diodes, a wavelength conversion layer, a light-shielding pattern layer, a light filter layer, and an air gap is provided. The micro light-emitting diodes are disposed on the first substrate and respectively located in a plurality of sub-pixel areas. The micro light-emitting diodes are adapted to emit a light beam. The wavelength conversion layer is overlapped with at least a portion of the micro light-emitting diodes. The light beam is used to excite the wavelength conversion layer to emit a converted light beam. The light filter layer is disposed between the wavelength conversion layer and the second substrate and overlapped with the micro light-emitting diodes. The air gap is disposed between any two adjacent ones of any one of the micro light-emitting diodes, the second substrate, the wavelength conversion layer, and the light filter layer.Type: ApplicationFiled: November 29, 2021Publication date: October 20, 2022Applicant: PlayNitride Display Co., Ltd.Inventors: Sheng-Yuan Sun, Po-Wei Chiu, Loganathan Murugan
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Publication number: 20220320386Abstract: A micro LED display device is provided. The micro LED display device includes a substrate. The micro LED display device also includes a first micro LED disposed on the substrate. The micro LED display device further includes at least one first refraction structure disposed on and corresponding to the first micro LED. Moreover, the micro LED display device includes a second micro LED disposed on the substrate and adjacent to the first micro LED. The micro LED display device also includes at least one second refraction structure disposed on and corresponding to the second micro LED.Type: ApplicationFiled: July 7, 2021Publication date: October 6, 2022Applicant: PlayNitride Display Co., Ltd.Inventors: Sheng-Yuan SUN, Po-Wei CHIU, LOGANATHAN MURUGAN
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Publication number: 20220246671Abstract: A micro light-emitting diode display panel includes a substrate, at least one light-emitting element, a reflective layer and a light-absorbing layer. The at least one light-emitting element is disposed on the substrate to define at least one pixel, and each light-emitting element includes micro light-emitting diodes. The reflective layer is disposed on the substrate and located between the micro light-emitting diodes. The reflective layer has cavities surrounding the micro light-emitting diodes, such that a thickness of a portion of the reflective layer close to any one of the micro light-emitting diodes is greater than a thickness of a portion of the reflective layer away from the corresponding micro light-emitting diode. The light-absorbing layer is at least disposed in the cavities of the reflective layer.Type: ApplicationFiled: March 31, 2021Publication date: August 4, 2022Applicant: PlayNitride Display Co., Ltd.Inventors: Sheng-Yuan Sun, Loganathan Murugan, Po-Wei Chiu, Yun-Li Li
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Publication number: 20220246794Abstract: A micro light-emitting diode (LED) display panel including a substrate, a first micro LED, a first light-shielding wall, a second micro LED, and a second light-shielding wall is provided. The substrate includes a plurality of pixel regions arranged in an array. The first micro LED is disposed on one of the pixel regions of the substrate. The first light-shielding wall is disposed on the substrate and located beside the first micro LED. The second micro LED is disposed on the one of the pixel regions of the substrate and located beside the first micro LED. The second light-shielding wall is disposed on the substrate and located beside the second micro LED. A light wavelength of the first micro LED is different from a light wavelength of the second micro LED. A height of the first light-shielding wall is smaller than a height of the second light-shielding wall.Type: ApplicationFiled: August 23, 2021Publication date: August 4, 2022Applicant: PlayNitride Display Co., Ltd.Inventors: Sheng-Yuan Sun, LOGANATHAN MURUGAN, Po-Wei Chiu
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Publication number: 20220246800Abstract: A micro-light-emitting diode chip includes an epitaxial structure, an electrode, a transparent structure, and a reflection layer. The epitaxial structure has a light exit surface, a back surface opposite to the light exit surface, and a sidewall surface. The sidewall surface is connected to the light exit surface and the back surface. The electrode is electrically coupled to the epitaxial structure. The transparent structure has an inner surface and an outer surface opposite to the inner surface. The inner surface is connected to the sidewall surface. A distance between the outer surface and the inner surface on a plane where the back surface is located is less than a distance between the outer surface and the inner surface on a plane where the light exit surface is located. The reflection layer is in direct contact with the outer surface. A micro-light-emitting diode display is also provided.Type: ApplicationFiled: September 13, 2021Publication date: August 4, 2022Applicant: PlayNitride Display Co., Ltd.Inventors: Sheng-Yuan Sun, LOGANATHAN MURUGAN, Po-Wei Chiu
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Publication number: 20220059607Abstract: A display apparatus including at least one driving circuit board, a plurality of light-emitting units, and a light-shielding layer is provided. The light-emitting units are disposed on a surface of the at least one driving circuit board and respectively have a plurality of pixel areas. The light-shielding layer is disposed on the at least one driving circuit board and disposed between the light-emitting units. The light-emitting units each have a circuit layer and a plurality of micro light-emitting devices. The circuit layer is electrically bonded to one of the at least one driving circuit board. The plurality of micro light-emitting devices are disposed on a side of the circuit layer away from the at least one driving circuit board and electrically bonded to the circuit layer. The micro light-emitting devices are respectively located in the pixel areas. A method of fabricating the display apparatus is also provided.Type: ApplicationFiled: February 25, 2021Publication date: February 24, 2022Applicant: PlayNitride Display Co., Ltd.Inventors: LOGANATHAN MURUGAN, Sheng-Yuan Sun, Chun-Ming Tseng, Yi-Chun Shih
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Patent number: 11189607Abstract: A micro LED display panel which is transparent to ambient light includes a TFT substrate, a plurality of micro LEDs, a first insulating layer, and a second insulating layer. The TFT substrate includes a first surface and a second surface. The micro LEDs and the first insulating layer are on the first surface. The first insulating layer is transparent. The second insulating layer includes insulating units spaced from each other and made of a light absorbing material. Each insulating unit is on a side of the first insulating layer away from the TFT substrate and each micro LED is embedded in the first insulating layer and in one of insulating units. Regions of the TFT substrate not covered by the insulating layer are regions which allow light to pass through.Type: GrantFiled: May 24, 2019Date of Patent: November 30, 2021Assignee: HON HAI PRECISION INDUSTRY CO., LTD.Inventors: I-Wei Wu, I-Min Lu, Loganathan Murugan
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Publication number: 20190363127Abstract: A micro LED display panel which is transparent to ambient light includes a TFT substrate, a plurality of micro LEDs, a first insulating layer, and a second insulating layer. The TFT substrate includes a first surface and a second surface. The micro LEDs and the first insulating layer are on the first surface. The first insulating layer is transparent. The second insulating layer includes insulating units spaced from each other and made of a light absorbing material. Each insulating unit is on a side of the first insulating layer away from the TFT substrate and each micro LED is embedded in the first insulating layer and in one of insulating units. Regions of the TFT substrate not covered by the insulating layer are regions which allow light to pass through.Type: ApplicationFiled: May 24, 2019Publication date: November 28, 2019Inventors: I-WEI WU, I-MIN LU, Loganathan Murugan