Scanning waveguide display
A waveguide display includes a source assembly, an output waveguide, and a controller. The source assembly includes a light source and an optics system. The light source includes source elements arranged in a 1D or 2D array that emit image light. The optics system includes a scanning mirror assembly that scans the image light to particular locations based on scanning instructions. The output waveguide receives the scanned image light from the scanning mirror assembly and outputs an expanded image light. In some embodiments, the waveguide display includes a source waveguide and the 1D array of source elements. The source waveguide receives a conditioned image light from the source assembly. The controller generates the scanning instructions and provides the scanning instructions to the scanning mirror assembly. In some embodiments, the controller provides the scanning instructions to an actuator assembly of the source waveguide.
1. A waveguide display, comprising:
a light source configured to emit light related to a plurality of discrete sections in accordance with illumination instructions;
a scanning assembly configured to scan the emitted light to a plurality of areas of a coupling element in accordance with scanning instructions;
a waveguide with the coupling element, the waveguide configured to output a version of the scanned light such that each discrete section included in the version of the scanned light is presented at a different location of an exit pupil of the waveguide; and
a controller configured to:
generate the illumination instructions and the scanning instructions,
provide the illumination instructions to the light source,
provide the scanning instructions to the scanning assembly, and
divide presentation content into the plurality of discrete sections.
2. The waveguide display of claim 1 , wherein:
the controller is further configured to divide the presentation content into a plurality of lines; and
the scanning assembly is further configured to scan the light related to the plurality of lines by scanning each of the lines to a respective area of the plurality of areas of the coupling element.
3. The waveguide display of claim 1 , wherein:
the light source is further configured to sequentially emit a plurality of portions of the light such that each of the portions is related to a respective discrete section of the plurality of discrete sections; and
each discrete section of the plurality of discrete sections is presented at the exit pupil at a respective time instant.
4. The waveguide display of claim 1 , wherein:
the scanning assembly is further configured to scan the emitted light along at least two dimensions to generate the scanned light; and
the waveguide is further configured to:
receive the scanned light at the plurality of areas of the coupling element, and
output the version of the scanned light from a decoupling element of the waveguide along the at least two dimensions.
5. A waveguide display, comprising:
a controller configured to divide presentation content into a plurality of discrete sections;
a light source configured to emit light related to the discrete sections based on instructions from the controller; and
a scanning assembly coupled to the light source, the scanning assembly configured to scan the emitted light to a plurality of areas of a coupling element of a waveguide that outputs a version of the scanned light, wherein each discrete section is presented at a different location of an exit pupil of the waveguide.
6. The waveguide display of claim 5 , wherein the light source is further configured to sequentially emit a plurality of portions of the light such that each of the portions is related to a respective discrete section of the plurality of discrete sections.
7. The waveguide display of claim 5 , wherein each discrete section of the plurality of discrete sections is presented at the exit pupil at a respective time instant.
8. The waveguide display of claim 5 , wherein the light source comprises a linear one-dimensional array of source elements.
9. The waveguide display of claim 5 , wherein:
the controller is further configured to divide the presentation content into a plurality of lines; and
the scanning assembly is further configured to scan the light related to the plurality of lines by scanning each of the lines to a respective area of the plurality of areas of the coupling element.
10. The waveguide display of claim 9 , wherein each of the lines is presented at the different location of the exit pupil.
11. The waveguide display of claim 5 , wherein the light source is one of: a laser diode, a vertical cavity surface emitting laser, a light emitting diode, and a tunable laser.
12. The waveguide display of claim 5 , wherein the light source is configured to emit the light that is continuous.
13. The waveguide display of claim 5 , wherein the light source is configured to emit the light that is pulsed.
14. The waveguide display of claim 5 , wherein the light source is configured to emit the light based on one or more illumination parameters from the controller, the one or more illumination parameters comprise information about at least one of a wavelength, a pulse rate, a pulse amplitude, and a beam type.
15. The waveguide display of claim 5 , wherein:
the scanning assembly is further configured to scan the emitted light along at least two dimensions to generate the scanned light; and
the waveguide is configured to:
receive the scanned light at the plurality of areas of the coupling element, and
output the version of the scanned light from a decoupling element of the waveguide along the at least two dimensions.
16. The waveguide display of claim 1 , wherein the scanning assembly comprises a first mirror configured to scan a first version of the emitted light along a first dimension and a second mirror configured to scan a second version of the emitted light along a second dimension, the first dimension and the second dimension orthogonal to each other.
17. A method, comprising:
dividing presentation content into a plurality of discrete sections;
instructing a light source to emit light related to the discrete sections; and
instructing a scanning assembly coupled to the light source to scan the emitted light to a plurality of areas of a coupling element of a waveguide that outputs a version of the scanned light, wherein each discrete section is presented at a different location of an exit pupil of the waveguide.
18. The method of claim 17 , further comprising:
instructing the light source to sequentially emit a plurality of portions of the light such that each of the portions is related to a respective discrete section of the plurality of discrete sections, wherein
each discrete section of the plurality of discrete sections is presented at the exit pupil at a respective time instant.
19. The method of claim 17 , further comprising:
dividing the presentation content into a plurality of lines; and
instructing the scanning assembly to scan the light related to the plurality of lines by scanning each of the lines to a respective area of the plurality of areas of the coupling element.
20. The method of claim 19 , wherein each of the lines is presented at the different location of the exit pupil.