MicroLED array with yellow sub-pixels
AssigneeLumileds LLC
InventorsJohannes Willem Herman Sillevis Smitt, Brendan Jude Moran, Zhongmin Ren
Life of this patent
Estimating the term…
Abstract
A lighting system and method of driving an array of micro light emitter (microLED) pixels are disclosed. Each pixel contains a blue sub-pixel configured to emit blue light, a red sub-pixel configured to emit red light, a green sub-pixel configured to emit green light, and a yellow sub-pixel configured to emit yellow light. A processor selects, for each pixel to produce white light, between driving the blue sub-pixel and yellow sub-pixel to produce the white light and driving the blue sub-pixel, the red sub-pixel, the green sub-pixel, and the yellow sub-pixel to produce the white light.
Claims19
A micro light-emitting diode (microLED) device comprising:
- an array of pixels, each pixel containing a plurality of sub-pixels that each contain a microLED, the sub-pixels including a blue sub-pixel configured to emit blue light, a red sub-pixel configured to emit red light, a green sub-pixel configured to emit green light, and a yellow sub-pixel configured to emit yellow light;
- and
- a processor configured to:
- select, for each pixel to produce white light, between driving the blue sub-pixel and yellow sub-pixel to produce the white light and driving the blue sub-pixel, the red sub-pixel, the green sub-pixel, and the yellow sub-pixel to produce the white light,
- select, for each pixel to produce white light, driving of the sub-pixels to produce the white light dependent on at least one characteristic of the pixel, the at least one characteristic selected from a group of characteristics that include brightness, efficiency of the white light produced, and power source used to generate the white light, and
- in response to a determination that a brightness of the white light is to exceed a predetermined threshold, drive all of the sub-pixels to produce the white light.
A non-transitory machine-readable medium that stores instructions for execution by one or more processors of a micro light-emitting diode (microLED) device, the one or more processors configure the microLED device to, when the instructions are executed perform operations comprising:
- selecting, for each pixel to produce white light in an array of pixels, a set of sub-pixels that each contain a microLED, the sub-pixels including a blue sub-pixel configured to emit blue light, a red sub-pixel configured to emit red light, a green sub-pixel configured to emit green light, and a yellow sub-pixel configured to emit yellow light, the set of sub-pixels selected from a group of sets that include a first set that contains the blue sub-pixel and the yellow sub-pixel and a second set that contains the blue sub-pixel, the red sub-pixel, the green sub-pixel, and the yellow sub-pixel, the selecting comprising selecting, for each pixel to produce white light, driving of the sub-pixels to produce the white light dependent on at least one characteristic of the pixel, the at least one characteristic selected from a group of characteristics that include brightness, efficiency of the white light produced, and power source used to generate the white light;
- and
- controlling driving of the set of sub-pixels to produce the white light, the controlling comprising controlling driving of all of the sub-pixels to produce the white light in response to a determination that a brightness of the white light is to exceed a predetermined threshold.
A micro light-emitting diode (microLED) device comprising:
- an array of pixels;
- and
- a processor configured to, for each pixel:
- determine a gamut of pixel chromaticity for a particular color to be produced by the pixel, each gamut defined by a different triad of colors in a color space chromaticity diagram, the pixel containing sub-pixels that each contain a microLED, the sub-pixels including a blue sub-pixel configured to emit blue light, a red sub-pixel configured to emit red light, a green sub-pixel configured to emit green light, and a yellow sub-pixel configured to emit yellow light;
- determine a bias of each sub-pixel based on the gamut determined;
- and
- control driving of the sub-pixels based on the bias to produce the particular color, the driving comprising:
- selecting, for each pixel to produce white light, driving of the sub-pixels to produce the white light dependent on at least one characteristic of the pixel, the at least one characteristic selected from a group of characteristics that include brightness, efficiency of the white light produced, and power source used to generate the white light, and
- driving of all of the sub-pixels to produce the white light in response to a determination that a brightness of the white light is to exceed a predetermined threshold.
Dependencies are inferred from the claim text.