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).

  • Patent number: 11973068
    Abstract: 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: Grant
    Filed: October 28, 2021
    Date of Patent: April 30, 2024
    Assignee: PLAYNITRIDE DISPLAY CO., LTD.
    Inventors: Loganathan Murugan, Sheng-Yuan Sun, Po-Wei Chiu
  • Publication number: 20240096856
    Abstract: 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: Application
    Filed: November 29, 2023
    Publication date: March 21, 2024
    Applicant: PlayNitride Display Co., Ltd.
    Inventors: Loganathan MURUGAN, Sheng-Yuan SUN, Po-Wei CHIU
  • Patent number: 11935985
    Abstract: 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: Grant
    Filed: August 23, 2021
    Date of Patent: March 19, 2024
    Assignee: PlayNitride Display Co., Ltd.
    Inventors: Sheng-Yuan Sun, Loganathan Murugan, Po-Wei Chiu
  • Patent number: 11923399
    Abstract: 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: Grant
    Filed: March 31, 2021
    Date of Patent: March 5, 2024
    Assignee: PlayNitride Display Co., Ltd.
    Inventors: Sheng-Yuan Sun, Loganathan Murugan, Po-Wei Chiu, Yun-Li Li
  • Patent number: 11916170
    Abstract: 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: Grant
    Filed: September 13, 2021
    Date of Patent: February 27, 2024
    Assignee: PlayNitride Display Co., Ltd.
    Inventors: Sheng-Yuan Sun, Loganathan Murugan, Po-Wei Chiu
  • Publication number: 20230395759
    Abstract: 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: Application
    Filed: June 1, 2022
    Publication date: December 7, 2023
    Applicant: PlayNitride Display Co., Ltd.
    Inventors: LOGANATHAN MURUGAN, Sheng-Yuan Sun, Po-Wei Chiu
  • Patent number: 11776990
    Abstract: 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: Grant
    Filed: November 29, 2021
    Date of Patent: October 3, 2023
    Assignee: PlayNitride Display Co., Ltd.
    Inventors: Sheng-Yuan Sun, Po-Wei Chiu, Loganathan Murugan
  • Publication number: 20230231001
    Abstract: 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: Application
    Filed: March 16, 2022
    Publication date: July 20, 2023
    Applicant: PlayNitride Display Co., Ltd.
    Inventors: Sheng-Yuan Sun, LOGANATHAN MURUGAN, Po-Wei Chiu
  • Publication number: 20230154901
    Abstract: 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: Application
    Filed: January 6, 2022
    Publication date: May 18, 2023
    Applicant: PlayNitride Display Co., Ltd.
    Inventors: Shiang-Ning Yang, Sheng-Yuan Sun, LOGANATHAN MURUGAN, Yu-Yun Lo, Bo-Wei Wu
  • Publication number: 20230135465
    Abstract: 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: Application
    Filed: October 28, 2021
    Publication date: May 4, 2023
    Applicant: PlayNitride Display Co., Ltd.
    Inventors: Loganathan MURUGAN, Sheng-Yuan SUN, Po-Wei CHIU
  • Publication number: 20230033031
    Abstract: 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: Application
    Filed: November 3, 2021
    Publication date: February 2, 2023
    Inventors: Yen-Yeh CHEN, YU-JUI TSENG, SHENG-YUAN SUN, LOGANATHAN MURUGAN, PO-WEI CHIU
  • Publication number: 20220336526
    Abstract: 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: Application
    Filed: November 29, 2021
    Publication date: October 20, 2022
    Applicant: PlayNitride Display Co., Ltd.
    Inventors: Sheng-Yuan Sun, Po-Wei Chiu, Loganathan Murugan
  • Publication number: 20220320386
    Abstract: 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: Application
    Filed: July 7, 2021
    Publication date: October 6, 2022
    Applicant: PlayNitride Display Co., Ltd.
    Inventors: Sheng-Yuan SUN, Po-Wei CHIU, LOGANATHAN MURUGAN
  • Publication number: 20220246671
    Abstract: 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: Application
    Filed: March 31, 2021
    Publication date: August 4, 2022
    Applicant: PlayNitride Display Co., Ltd.
    Inventors: Sheng-Yuan Sun, Loganathan Murugan, Po-Wei Chiu, Yun-Li Li
  • Publication number: 20220246794
    Abstract: 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: Application
    Filed: August 23, 2021
    Publication date: August 4, 2022
    Applicant: PlayNitride Display Co., Ltd.
    Inventors: Sheng-Yuan Sun, LOGANATHAN MURUGAN, Po-Wei Chiu
  • Publication number: 20220246800
    Abstract: 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: Application
    Filed: September 13, 2021
    Publication date: August 4, 2022
    Applicant: PlayNitride Display Co., Ltd.
    Inventors: Sheng-Yuan Sun, LOGANATHAN MURUGAN, Po-Wei Chiu
  • Publication number: 20220059607
    Abstract: 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: Application
    Filed: February 25, 2021
    Publication date: February 24, 2022
    Applicant: PlayNitride Display Co., Ltd.
    Inventors: LOGANATHAN MURUGAN, Sheng-Yuan Sun, Chun-Ming Tseng, Yi-Chun Shih
  • Patent number: 11189607
    Abstract: 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: Grant
    Filed: May 24, 2019
    Date of Patent: November 30, 2021
    Assignee: HON HAI PRECISION INDUSTRY CO., LTD.
    Inventors: I-Wei Wu, I-Min Lu, Loganathan Murugan
  • Publication number: 20190363127
    Abstract: 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: Application
    Filed: May 24, 2019
    Publication date: November 28, 2019
    Inventors: I-WEI WU, I-MIN LU, Loganathan Murugan