µ-LED, µ-LED DEVICE, DISPLAY AND METHOD FOR THE SAME

Abstract

Disclosed are various aspects of a μ-LED or a μ-LED array for augmented reality or lighting applications, in particular in the automotive field. The μ-LED is characterized by particularly small dimensions in the range of a few μm.

1 . An optoelectronic component, comprising:
 a μ-LED array with at least one μ-LED which emits electromagnetic radiation via a light emission surface;   a photonic structure for beam-shaping of the electromagnetic radiation before exiting via the light emission surface, wherein the photonic structure shapes the electromagnetic radiation such that the electromagnetic radiation has a specific far field; and   a collimating optical system arranged downstream of the light emission surface as viewed in a main radiation direction, the collimating optical system being configured to collimate the electromagnetic radiation in a second spatial direction, which is orthogonal to a first spatial direction.   
     
     
         2 . The optoelectronic component according to  claim 1 , wherein the photonic structure is a one-dimensional photonic crystal. 
     
     
         3 . The optoelectronic component according to  claim 1 , wherein the photonic structure is formed as a one-dimensional photonic crystal, in such a way that the electromagnetic radiation is at least approximately collimated in the first spatial direction. 
     
     
         4 . The optoelectronic component according to  claim 1 , wherein the photonic structure is formed as a one-dimensional photonic crystal, and is configured in such a way that the main radiation direction of the electromagnetic radiation runs at an angle to a normal of the light emission surface, the angle being not equal to zero degrees. 
     
     
         5 . The optoelectronic component according to  claim 1 , wherein the photonic structure is formed as a one-dimensional photonic crystal and is arranged in a layer below the light emission surface, wherein the one-dimensional photonic crystal comprises a periodically repeating sequence of two materials with different optical refractive indices extending in a first direction, wherein the two materials have abutting interfaces which are not orthogonal but inclined to the light emission surface. 
     
     
         6 . The optoelectronic component according to  claim 1 , wherein the photonic structure is a two-dimensional photonic crystal. 
     
     
         7 . The optoelectronic component according to  claim 6 , wherein the two-dimensional photonic crystal is configured such that the electromagnetic radiation produces a discrete pattern in the specific far field. 
     
     
         8 . The optoelectronic component according to  claim 1 ,
 wherein the photonic structure is arranged in a first semiconductor layer below the light emission surface, and/or   wherein the photonic structure is formed in a second semiconductor layer of an optoelectronic emitter unit, and/or   wherein the optoelectronic emitter unit comprises a converter material layer and the photonic structure is formed in the converter material layer or in a layer between the converter material layer and the light emission surface.   
     
     
         9 . The optoelectronic component according to  claim 1 , wherein the photonic structure is a quasi-periodic or deterministically aperiodic photonic structure. 
     
     
         10 . A surface topography recognition system, comprising:
 an optoelectronic device comprising:
 at least one optoelectronic emitter unit which emits electromagnetic radiation via a light emission surface; 
 a photonic structure for beam-shaping of the electromagnetic radiation before exiting via the light emission surface; 
 wherein the photonic structure shapes the electromagnetic radiation such that the electromagnetic radiation has a specific far field; 
 wherein the photonic structure is a two-dimensional photonic crystal; and 
 wherein the two-dimensional photonic crystal is configured such that the electromagnetic radiation generates a discrete pattern in the specific far field; and 
   a detection unit comprising a camera configured to detect the discrete pattern in the specific far field.   
     
     
         11 . The surface topography recognition system according to  claim 10 , further comprising an analysis device adapted to detect a distortion of the discrete pattern with respect to a predetermined reference pattern. 
     
     
         12 . The surface topography recognition system according to  claim 11 , wherein the analysis device is adapted to determine a shape and/or a structure of an object illuminated by the discrete pattern as a function of the distortion. 
     
     
         13 . A scanner for scanning an object comprising at least one optoelectronic component according to  claim 1 . 
     
     
         14 . A μ-LED arrangement for generating a pixel of a display, comprising:
 a flat carrier substrate; 
 at least three μ-LEDs which are arranged on a mounting side of the flat carrier substrate, wherein the at least three μ-LEDs are adapted to emit light of different color transverse to a carrier substrate plane in a direction away from the flat carrier substrate; 
 a flat reflector element spatially arranged on an assembly side relative to the at least three μ-LEDs and configured to reflect light emitted by the at least three μ-LEDs in a direction of the flat carrier substrate; 
 wherein the flat carrier substrate is at least partially transparent so that light reflected from the flat reflector element propagates through the flat carrier substrate and emerges at a display side of the flat carrier substrate opposite the mounting side; and 
 wherein a photonic structure is incorporated in or on the flat carrier substrate, with first and second regions with different refractive indexes, wherein a converter material forms one of the first and second regions and is configured in such a way that radiation is emitted as a directed beam of rays.