Variable-pitch color emitting display
This disclosure relates to the use of variable-pitch light-emitting devices for display applications, including for displays in augmented reality, virtual reality, and mixed reality environments. In particular, it relates to small (e.g., micron-size) light emitting devices (e.g., micro-LEDs) of variable pitch to provide the advantages, e.g., of compactness, manufacturability, color rendition, as well as computational and power savings. Systems and methods for emitting multiple lights by multiple panels where a pitch of one panel is different than pitch(es) of other panels are disclosed. Each panel may comprise a respective array of light emitters. The multiple lights may be combined by a combiner.
1. A system comprising:
a first panel comprising a first array of light emitters, the first panel configured for emitting a first light at a first pitch, the first light comprising a first color;
a second panel comprising a second array of light emitters, the second panel configured for emitting a second light at a second pitch, the second light comprising a second color, the second color different than the first color;
a third panel comprising a third array of light emitters, the third panel configured for emitting a third light at a third pitch, the third light comprising a third color, the third color different than the first color and the second color;
a combiner configured for receiving the first light, the second light, and the third light; and
electronic circuitry configured for:
receiving video data,
performing color-wise down-sampling on the received video data to produce first down-sampled video data, the first down-sampled video data associated with the first color,
performing color-wise down-sampling on the received video data to produce second down-sampled video data, the second down-sampled video data associated with the third color, and
driving the first panel, the second panel, and the third panel, wherein:
the first light emitted by the first panel is based on the first down-sampled video data, and
the third light emitted by the third panel is based on the second down-sampled video data,
wherein the second pitch of the second panel is smaller than the first pitch of the first panel and is smaller than the third pitch of the third panel.
2. The system of claim 1 , wherein the first light comprises a red light, the second light comprises a green light, and the third light comprises a blue light.
3. The system of claim 2 , wherein:
the first light comprises a first monochrome light,
the second light comprises a second monochrome light, and
the third light comprises a third monochrome light.
4. The system of claim 1 , wherein the light emitters of the second array are smaller in size than the light emitters of the first array and are smaller in size than the light emitters of the third array.
5. The system of claim 1 , wherein:
a light emitter of the first array has a first single-emitter footprint corresponding to a first set of dimensions associated with the first pitch of the first panel,
a light emitter of the second array has a second single-emitter footprint corresponding to a second set of dimensions associated with the second pitch of the second panel,
a light emitter of the third array has a third single-emitter footprint corresponding to a third set of dimensions associated with the third pitch of the third panel, and
the second single-emitter footprint is smaller than the first single-emitter footprint and is smaller than the third single-emitter footprint.
6. The system of claim 5 , wherein:
a 2×2 array of four light emitters of the second array corresponds to a fourth set of dimensions, and
each of the first set of dimensions, the third set of dimensions, and the fourth set of dimensions are substantially equal.
7. The system of claim 5 , wherein:
a 2×2 array of four light emitters of the first array corresponds to a fifth set of dimensions,
a 4×4 array of sixteen light emitters of the second array corresponds to a sixth set of dimensions, and.
each of the third set of dimensions, the fifth set of dimensions, and the sixth set of dimensions are substantially equal.
8. The system of claim 1 , wherein the combiner comprises an X-cube combiner.
9. A method comprising:
emitting, by a first panel comprising a first array of light emitters, a first light at a first pitch, the first light comprising a first color;
emitting, by a second panel comprising a second array of light emitters, a second light at a second pitch, the second light comprising a second color, the second color different than the first color;
emitting, by a third panel comprising a third array of light emitters, a third light at a third pitch, the third light comprising a third color, the third color different than the first color and the second color;
receiving, by a combiner, the first light, the second light, and the third light;
receiving, at electronic circuitry, video data;
performing, at the electronic circuitry, color-wise down-sampling on the received video data to produce first down-sampled video data, the first down-sampled video data associated with the first color;
performing, at the electronic circuitry, color-wise down-sampling on the received video data to produce second down-sampled video data, the second down-sampled video data associated with the third color; and
driving the first panel, the second panel, and the third panel, wherein:
the first light emitted by the first panel is based on the first down-sampled video data, and
the third light emitted by the third panel is based on the second down-sampled video data,
wherein the second pitch of the second panel is smaller than the first pitch of the first panel and is smaller than the third pitch of the third panel.
10. The method of claim 9 , wherein the first light comprises a red light, the second light comprises a green light, and the third light comprises a blue light.
11. The method of claim 10 , wherein:
the first light comprises a first monochrome light,
the second light comprises a second monochrome light, and
the third light comprises a third monochrome light.
12. The method of claim 9 , wherein the light emitters of the second array are smaller in size than the light emitters of the first array and are smaller in size than the light emitters of the third array.
13. The method of claim 9 , wherein:
a light emitter of the first array has a first single-emitter footprint corresponding to a first set of dimensions associated with the first pitch of the first panel,
a light emitter of the second array has a second single-emitter footprint corresponding to a second set of dimensions associated with the second pitch of the second panel,
a light emitter of the third array has a third single-emitter footprint corresponding to a third set of dimensions associated with the third pitch of the third panel, and
the second single-emitter footprint is smaller than the first single-emitter footprint and is smaller than the third single-emitter footprint.
14. The method of claim 13 , wherein:
a 2×2 array of four light emitters of the second array corresponds to a fouxth set of dimensions, and
each of the first set of dimensions, the third set of dimensions, and the fourth set of dimensions are substantially equal.
15. The method of claim 13 , wherein:
a 2×2 array of four light emitters of the first array corresponds to a fifth set of dimensions,
a 4×4 array of sixteen light emitters of the second array corresponds to a sixth set of dimensions, and
each of the third set of dimensions, the fifth set of dimensions, and the sixth set of dimensions are substantially equal.
16. The method of claim 9 , wherein the combiner comprises an X-cube combiner.