Sub-pixel for a display with controllable viewing angle

Patent metadata

Field	Value
Publication number	US-2021110764-A1
Application number	US-202017131551-A
Country	US
Kind code	A1
Filing date	Dec 22, 2020
Priority date	Oct 22, 2014
Publication date	Apr 15, 2021
Grant date	—

Abstract

A sub-pixel for an LED display, the sub-pixel comprising a first light emitting device having a first emission beam angle and a second light emitting device having a second beam angle, the second emission beam angle being different to the first emission beam angle. There is also described a display using a plurality of the sub-pixels.

First claim

1 .- 22 . (canceled)

23 . A light emitting diode (LED) display, comprising:
a plurality of inorganic (ILED) array chips, each ILED array chip including a plurality of ILED emitters configured to emit light having different emission beam angles and having a same color, each ILED emitter of the plurality of ILED array chips providing a display sub-pixel of the LED display, the plurality of ILED emitters of each of the plurality of ILED array chips providing display sub-pixels of a different color, each display pixel of the LED display including display sub-pixels provided by multiple ILED emitters of different ILED array chips; and a backplane attached with the plurality of ILED array chips, the backplane configured to provide drive currents to the plurality of ILED array chips.

24 . The LED display of claim 23 , wherein the plurality ILED array chips include a first ILED array chip configured to emit light having a red color, a second ILED array chip configured to emit light having a blue color, and a third ILED array chip configured to emit light having a green color.

25 . The LED display of claim 23 , wherein the drive currents cause the plurality of ILED array chips to produce different viewing angles for different parts of the LED display.

26 . The LED display of claim 23 , wherein, for each ILED array chip, the plurality of ILED emitters configured to emit light having different emission beam angles includes a first ILED emitter having a first mesa shape and a second ILED emitter having a second mesa shape, the first mesa shape and the second mesa shape being different.

27 . The LED display of claim 23 , wherein, for each ILED array chip, the plurality of ILED emitters configured to emit light having different emission beam angles includes a first ILED emitter having a first light exiting surface roughness and a second ILED emitter having a second light exiting surface roughness, the first light exiting surface roughness and the second light exiting surface roughness being different.

28 . The LED display of claim 23 , wherein, for each ILED array chip, the plurality of ILED emitters configured to emit light having different emission beam angles includes a first ILED emitter having a first light exiting surface shape and a second ILED emitter having a second light exiting surface shape, the first light exiting surface shape and the second light exiting surface shape being different.

29 . The LED display of claim 23 , wherein, for each ILED array chip, an emission beam angle of an ILED emitter is modified by one of a lens or a coating.

30 . The LED display of claim 23 , wherein the drive currents cause the plurality of ILED array chips to produce variable viewing angles for the LED display.

31 . The LED display of claim 23 , wherein the plurality of ILED emitters of each of the plurality of ILED array chips are individually addressable.

32 . The LED display of claim 23 , wherein, for each ILED array chip, the light emitted by the plurality of ILED emitters is non-isotropic.

33 . The LED display of claim 23 , wherein:
for each ILED array chip, the plurality of ILED emitters include a first ILED emitter configured to emit light at a first emission beam angle and a second ILED emitter configured to emit light at a second emission beam angle; and the backplane drives the first and second ILED emitters of each ILED array chip using a ratio of drive currents that result in a viewing angle of the LED display between the first and second emission beam angles.

34 . A computer device, comprising:
a light emitting diode (LED) display, comprising:
a plurality of inorganic (ILED) array chips, each ILED array chip including a plurality of ILED emitters configured to emit light having different emission beam angles and having a same color, each ILED emitter of the plurality of ILED array chips providing a display sub-pixel of the LED display, the plurality of ILED emitters of each of the plurality of ILED array chips providing display sub-pixels of a different color, each display pixel of the LED display including display sub-pixels provided by multiple ILED emitters of different ILED array chips; and
a backplane attached with the plurality of ILED array chips, the backplane configured to provide drive currents to the plurality of ILED array chips; and
a processor configured to control the plurality of ILED array chips via the backplane to adjust a viewing angle of the LED display.

35 . The computer device of claim 34 , wherein the plurality ILED array chips include a first ILED array chip configured to emit light having a red color, a second ILED array chip configured to emit light having a blue color, and a third ILED array chip configured to emit light having a green color.

36 . The computer device of claim 34 , wherein the drive currents cause the plurality of ILED array chips to produce different viewing angles for different parts of the LED display

37 . The computer device of claim 34 , wherein, for each ILED array chip, the plurality of ILED emitters configured to emit light having different emission beam angles includes a first ILED emitter having a first mesa shape and a second ILED emitter having a second mesa shape, the first mesa shape and the second mesa shape being different.

38 . The computer device of claim 34 , wherein, for each ILED array chip, the plurality of ILED emitters configured to emit light having different emission beam angles includes a first ILED emitter having a first light exiting surface roughness and a second ILED emitter having a second light exiting surface roughness, the first light exiting surface roughness and the second light exiting surface roughness being different.

39 . The computer device of claim 34 , wherein, for each ILED array chip, the plurality of ILED emitters configured to emit light having different emission beam angles includes a first ILED emitter having a first light exiting surface shape and a second ILED emitter having a second light exiting surface shape, the first light exiting surface shape and the second light exiting surface shape being different.

40 . The computer device of claim 34 , wherein, for each ILED array chip, an emission beam angle of an ILED emitter is modified by one of a lens or a coating.

41 . The computer device of claim 34 , wherein the plurality of ILED emitters of each of the plurality of ILED array chips are individually addressable.

42 . The computer device of claim 34 , wherein:
for each ILED array chip, the plurality of ILED emitters include a first ILED emitter configured to emit light at a first emission beam angle and a second ILED emitter configured to emit light at a second emission beam angle; and the backplane, under control of the processor, drives the first and second ILED emitters of each ILED array chip using a ratio of drive currents that result in a viewing angle of the LED display between the first and second emission beam angles.

Assignees

• Facebook Tech Llc

Inventors

• Hughes Padraig
• O'Keeffe Joseph
• Henry William

Classifications

• H10W90/00

  Package configurations · CPC title

• H10K59/879

  comprising refractive means, e.g. lenses · CPC title

• H10K59/90

  Assemblies of multiple devices comprising at least one organic light-emitting element · CPC title

• G09G2360/144

  the light being ambient light · CPC title

• G09G2320/0626

  for control of overall brightness · CPC title