US 12,283,648 B2
μ-led, μ-led device, display and method for the same
Hubert Halbritter, Dietfurt-Toeging (DE); and Laura Kreiner, Regensburg (DE)
Assigned to OSRAM Opto Semiconductors GmbH, Regensburg (DE)
Filed by OSRAM Opto Semiconductors GmbH, Regensburg (DE)
Filed on Oct. 29, 2021, as Appl. No. 17/515,326.
Application 17/515,326 is a continuation of application No. 17/038,283, filed on Sep. 30, 2020, granted, now 11,271,143.
Application 17/038,283 is a continuation of application No. PCT/EP2020/052191, filed on Jan. 29, 2020.
Claims priority of application No. 10 2019 201 114.4 (DE), filed on Jan. 29, 2019; application No. PA201970059 (DK), filed on Jan. 29, 2019; application No. 10 2019 103 365.9 (DE), filed on Feb. 11, 2019; application No. 10 2019 111 766.6 (DE), filed on May 7, 2019; application No. 10 2019 111 767.4 (DE), filed on May 7, 2019; application No. 10 2019 112 605.3 (DE), filed on May 14, 2019; application No. 10 2019 112 609.6 (DE), filed on May 14, 2019; application No. 10 2019 113 636.9 (DE), filed on May 22, 2019; application No. 10 2019 114 321.7 (DE), filed on May 28, 2019; application No. 10 2019 118 084.8 (DE), filed on Jul. 4, 2019; application No. 10 2019 125 336.5 (DE), filed on Sep. 20, 2019; application No. 10 2019 125 349.7 (DE), filed on Sep. 20, 2019; application No. 10 2019 127 424.9 (DE), filed on Oct. 11, 2019; application No. 10 2019 127 425.7 (DE), filed on Oct. 11, 2019; application No. 10 2019 130 821.6 (DE), filed on Nov. 14, 2019; and application No. 10 2019 131 506.9 (DE), filed on Nov. 21, 2019.
Prior Publication US 2022/0059738 A1, Feb. 24, 2022
Int. Cl. H01L 33/52 (2010.01); B60K 35/00 (2024.01); B60K 35/22 (2024.01); H01L 25/075 (2006.01); H01L 33/04 (2010.01); H01L 33/50 (2010.01); H01L 33/60 (2010.01)
CPC H01L 33/52 (2013.01) [H01L 25/0753 (2013.01); H01L 33/04 (2013.01); H01L 33/502 (2013.01); H01L 33/60 (2013.01); B60K 35/00 (2013.01); B60K 35/22 (2024.01); B60K 2360/1523 (2024.01)] 20 Claims
OG exemplary drawing
 
1. A μ-LED device, comprising:
at least a μ-LED with an active zone configured to generate first light having a first wavelength;
a photonic crystal disposed above a first major surface of the μ-LED and adapted to transmit only light in predetermined directions;
a reflective material disposed on at least one side surface of the μ-LED and on at least one side surface of said photonic crystal;
wherein the photonic crystal comprises first regions and second regions of different refractive indices;
wherein a converter material forms said first regions, wherein the converter material is configured to convert the first light of the first wavelength into second light of a second wavelength;
wherein side surfaces of the μ-LED are beveled with an angle of less than 90° in regards to an active layer of the μ-LED;
wherein a diameter is increasing towards the photonic crystal; and
wherein the reflective material is in contact with a μ-LED material of the μ-LED in an area laterally displaced from a top surface of the μ-LED.