DISPLAY SYSTEMS USING LIGHT EXTRACTION CONFIGURATIONS FOR MICRO LIGHT EMITTING DIODES
A display system is disclosed including an emitter system assembly for providing a light output. The emitter system assembly includes a first emitter that provides a first emission spectrum, a cavity at least partially surrounding the first emitter, a first aperture configured for transmitting therethrough at least a portion of the first emission spectrum from the first emitter, and a shaping element in optical communication with the first aperture. The cavity includes reflectors that reflect the first emission spectrum within the cavity and toward the aperture.
1 . An optical system comprising:
a display system comprising:
an emitter array panel having an emitter array and a lenslet array, wherein the lenslet array comprises cylindrical lenslets having optical power along a first axis; and
a projection lens having optical power along a second axis substantially perpendicular to the first axis; and
a pupil-replicating waveguide having an incoupling optical element and an outcoupling optical element.
2 . The optical system of claim 1 , wherein the emitter array comprises a plurality of microLED emitters.
3 . The optical system of claim 2 , wherein at least a portion of the cylindrical lenslets form an image of at least a portion of emitters within the emitter array at a distance between approximately 500 millimeters and infinity.
4 . The optical system of claim 2 , wherein a plurality of microLED emitters are grouped together to form a pixel within the emitter array panel.
5 . The optical system of claim 4 , wherein the pixels are disposed at a pitch over an area of the emitter array panel.
6 . The optical system of claim 5 , wherein the pitch is approximately 25 μm.
7 . The optical system of claim 1 , wherein the cylindrical lenslets are configured to focus, via optical power along the first axis, light from the emitter array at a first focal point that is at a first focal distance, and wherein the first focal distance is non-infinite.
8 . The optical system of claim 7 , wherein the first focal distance is approximately 1 meter.
9 . The optical system of claim 1 , wherein the projection lens is configured to collimate, via optical power along the second axis, light from the lenslet array.
10 . The optical system of claim 9 , wherein the projection lens is further configured to converge the collimated light at a pupil location.
11 . The optical system of claim 10 , wherein the incoupling optical element is positioned at the pupil location.
12 . The system of claim 7 , wherein the first focal distance is approximately equal to a light path distance of light reflecting through the waveguide toward a user's eye.
13 . The system of claim 1 , wherein the incoupling optical element is elongated.
14 . The system of claim 1 , wherein the outcoupling optical element is configured to replicate exit beams along a single axis.
15 . The system of claim 7 , wherein the projection lens is configured to focus, via optical power along the second axis, light from the lenslet array at a second focal point a second focal distance from the projection lens.
16 . The system of claim 15 , wherein the first focal point and the second focal point are located at substantially the same position.