Granted Patent B2

US 12,635,326 · App. 17/733,899 · Granted May 19, 2026

Inventors: Martin Behringer (Regensburg, DE); Andreas Biebersdorf (Regensburg, DE); Ruth Boss (Neutraubling, DE); Erwin Lang (Regensburg, DE); Tobias Meyer (Kelheim, DE); Alexander Pfeuffer (Regensburg, DE); Marc Philippens (Regensburg, DE); Julia Stolz (Regensburg, DE); Tansen Varghese (Regensburg, DE); Sebastian Wittmann (Regenstauf, DE); Siegfried Herrmann (Neukirchen, DE); Berthold Hahn (Hemau-Hohenschambach, DE); Bruno Jentzsch (Regensburg, DE); Korbinian Perzlmaier (Regensburg, DE); Peter Stauss (Regensburg, DE); Petrus Sundgren (Lappersdorf, DE); Jens Mueller (Regenstauf, DE); Kerstin Neveling (Pentling, DE); Frank Singer (Regenstauf, DE); Christian Mueller (Deuerling, DE)

Assignee: OSRAM Opto Semiconductors GmbH

H10H29/142H10H20/814H10H20/819H10H20/855

Abstract

Claims (29)

1 . A pixel with a plurality of u-LEDs for a display, wherein

the pixel is formed from at least two subpixels of the same color emission, wherein each subpixel is formed by a μ-LED of the plurality of μ-LEDs;

wherein a subpixel separating element is provided between two adjacent subpixels of the at least two subpixels of the same pixel; and

wherein the subpixel separating element is configured to be separating with respect to electrical control of the respective subpixels and is configured to be optically coupling with respect to the light emitted by the respective subpixels.

2 . Pixel according to claim 1 , wherein the at least two subpixels have a common epitaxial layer and the subpixel separating element extends trench-like into the epitaxial layer transversely to an epitaxial layer plane in a main emission direction.

3 . Pixel according to claim 1 , wherein the at least two subpixels of the pixel are independently electrically contactable and/or controllable.

4 . Pixel according to claim 1 , in which the at least two subpixels have a common active layer separated by the subpixel separating element.

5 . Pixel according to claim 1 , in which the subpixel separating element extends to or at least partially through an active layer of the pixel.

6 . Pixel according to claim 1 , in which the subpixel separating element is formed by quantum well intermixing generated by a diffused dopant, in in the region of an active layer.

7 . Pixel according to claim 1 , in which a light-shaping structure is formed having first and second regions, the first and second regions extending at least partially into a semiconductor material of the pixel.

8 . Pixel according to claim 7 , wherein the light-shaping structure extends into a partial area of an active layer.

9 . Pixel according to claim 1 , in which a light-shaping structure has a converter material in second areas.

10 . Pixel according to claim 1 , further comprising a microlens extending over a surface of the pixel.

11 . Pixel according to claim 1 , in which a transparent conductive layer is formed on a surface of the pixel.

12 . Pixel according to claim 1 , wherein at least one contact surface for contacting at least one subpixel of the at least two subpixels is provided on a side opposite to the light emission side.

13 . Display with a plurality of pixels according to claim 1 , wherein a pixel element separation layer is provided between two adjacent pixels, which is adapted to separate electrically the adjacent pixels with respect to the controlling of the respective pixels and to separate optically the adjacent pixels with respect to the light emitted by the two adjacent pixels.

14 . Display according to claim 13 , wherein the pixels and the associated at least two subpixels have a common epitaxial layer and the pixel element separation layer extends trench-like into the epitaxial layer transversely to the epitaxial layer plane in the main emission direction.

15 . Display according to claim 13 , wherein a trench depth of the pixel element separation layer is greater than a trench depth of the subpixel separation element.

16 . Display according to claim 13 , in which adjacent pixels comprise an active layer separated by the pixel element separation layer and/or a subpixel separation element.

17 . Display according to claim 13 , further comprising a support layer having contact areas corresponding to contact areas of pixels, wherein in the support layer at least one of the following elements is provided:

electrically conductive lines to a power supply of the pixel,

Current driver circuits or supply circuits;

Control circuit for adjusting a brightness;

one or more fuses that are electrically connected to at least one subpixel of a pixel.

18 . Method for calibrating a pixel, comprising the steps of:

driving a subpixel of the pixel according to claim 1 ;

acquiring of defect information of the subpixel;

storing of the defect information in a memory unit of a control unit.

19 . Method according to claim 18 , wherein the driving, the acquiring, and the storing is performed sequentially for all individual subpixels of the at least two subpixels of the pixel.

Assignments (2)

Priority Claims (10)

Continuity (3)

References Cited (397)