公开(公告)号：US11784288B2

公开(公告)日：2023-10-10

申请号：US16661361

申请日：2019-10-23

Applicant: Google LLC

Inventor： Benjamin Leung ,  Miao-Chan Tsai ,  Sheila Hurtt ,  Gang He ,  Richard Peter Schneider, Jr.

IPC: H01L33/32 ,  G02B3/04 ,  G02B27/30 ,  H01L33/00 ,  H01L33/18 ,  H01L33/60

CPC classification number: H01L33/325 ,  G02B3/04 ,  G02B27/30 ,  H01L33/0008 ,  H01L33/18 ,  H01L33/60

Abstract: The disclosure describes various aspects of using optical elements monolithically integrated with light-emitting diode (LED) structures. In an aspect, a light emitting device includes a single LED structure having an active region and a single optical element disposed on the LED structure and configured to collimate and steer light emitted by the LED structure. One or more additional optical elements may also be disposed on the LED structure. In another aspect, a light emitting device may include multiple LED structures and a single optical element disposed on the multiple LED structures and configured to collimate and steer light emitted by the multiple LED structures. For each of these aspects, the LED structure(s) and the optical element(s) are made of a material that includes GaN, the LED structure(s) has a corresponding active region, and the LED structure(s) has a corresponding reflective contact disposed opposite to the optical element(s).

公开(公告)号：US11694605B2

公开(公告)日：2023-07-04

申请号：US17408744

申请日：2021-08-23

Applicant: GOOGLE LLC

Inventor： Gang He ,  Richard Peter Schneider, Jr. ,  Andrew Victor Jones ,  James Richard Dodd, Jr. ,  Joseph Hsiao-Tien Han

IPC: H04N13/04 ,  G09G3/32 ,  G09G3/20 ,  G02B27/09 ,  H04N23/55

CPC classification number: G09G3/32 ,  G02B27/0955 ,  G09G3/2003 ,  H04N23/55 ,  G09G2310/0264

Abstract: A display system includes (i) a plurality of picture elements supported on a single semiconductor substrate and (ii) a backplane including electronic circuitry supported thereon and electronically connected with the picture elements. Each picture element includes a light steering optical element and an array of light emitting elements. The array of light emitting elements includes a first set, a second set, and a third set of inorganic LEDs that (i) are monolithically integrated on the single semiconductor substrate and (ii) emit, respectively, light at a first, a second, and a third wavelength, which are mutually distinct. The light steering optical element is configured for steering the light from the first set, second set, and third set of LEDs in a predetermined direction. The electronic circuitry is configured for individually driving each light emitting element of the array of light emitting elements.