Self aligning imager array
Implementations described herein generally relate to scanning beam display systems and more specifically, to systems and methods for improved image alignment of such scanning beam display systems. The method comprises providing a display system comprising a display screen having a plurality of display screen region each with a corresponding light engine module having a servo laser beam and an excitation laser beam, scanning the servo laser beam of a light engine module in an outer scanning region outside of the light engine module's corresponding display screen region, detecting servo laser beam feedback light to measure an alignment error of the light engine module relative to the light engine module's corresponding display screen region, and adjusting alignment of the excitation laser beam based on the measured alignment error.
1. A display system, comprising:
a continuous surface display screen, comprising:
a plurality of reference marks disposed on the continuous surface display screen;
a first imaging module;
a first servo system for determining placement of a first conveyed sub-image in a first given area of the continuous surface display screen, wherein at least one reference mark of the plurality of reference marks is used to determine placement of the first conveyed sub-image in the first given area;
a second imaging module; and
a second servo system for determining placement of a second conveyed sub-image in a second given area of the continuous surface display screen, wherein at least one reference mark of the plurality of reference marks is used to determine placement of the second conveyed sub-image in the second given area; and
a control unit operable to:
provide feedback signals to the first or second servo system;
access one or more alignment tables containing data representing physical parameters associated with the continuous surface display screen;
determine the correspondence between the determined placement of the first conveyed sub-image in the first given area of the display screen and the determined placement of the second conveyed sub-image in the second given area of the display screen;
instruct the first imaging module to convey an image first sub-image in the first given area of the display screen based on the feedback signals received by the servo systems, data contained in the alignment tables, and the determined correspondence between the determined placement of the first conveyed sub-image in the first and second given areas of the display screen; and
instruct the second imaging module to convey the image second sub-image in the second given area of the display screen based on the feedback signals received by the servo systems, data contained in the alignment tables, and the determined correspondence between the determined placement of the second conveyed sub-image in the first and second given areas of the display screen.
2. The system of claim 1 , wherein the image first sub-image is rendered as a first pixel array and the image second sub-image is rendered as a second pixel array.
3. The system of claim 2 , wherein the first pixel array and the second pixel array share common image information on one or more lines of pixels.
4. The system of claim 1 , wherein each servo system detects and relays spatial placement of specific light on a specific location of the continuous surface display screen.
5. The system of claim 4 , wherein each of the first servo system and the second servo system comprise:
a servo light source to produce at least one servo beam at a servo beam wavelength that is different from the excitation light wavelength; and
a servo detector positioned to receive reflected light of the servo beam and to produce a monitor signal indicative of positioning of the servo beam on the continuous surface display screen.
6. The system of claim 1 , wherein the image first sub-area and the image second sub-area of the display screen comprises a continuous section of the display screen.
7. The system of claim 1 , wherein the image first sub-area includes a first tilette and the image second sub-area includes a second tilette adjacent to the first tilette.
8. The system of claim 7 , wherein the image first sub-area further includes at least a portion of the second tilette.
9. The system of claim 1 , wherein the image first sub-area includes a portion of a first tilette and the image second sub-area includes a portion of the first tilette.
10. The system of claim 7 , wherein each tilette is a distinct panel comprising one or more columns, regions or dots of phosphor.
11. The system of claim 7 , wherein the reference marks are contained within the tilettes.
12. The system of claim 1 , wherein the continuous surface display screen comprises a plurality of contiguous tilettes.
13. The system of claim 1 , wherein the continuous surface display screen comprises a plurality of tilettes and each servo system determines the position of a tilette relative to the tilette's corresponding light engine module.
14. The system of claim 1 wherein the control unit is configured to:
detect first servo laser beam feedback light to determine a position of the first light engine module relative to an adjacent second display screen region;
detect second servo laser beam feedback light to determine a position of the second light engine module relative to the adjacent second display screen region; and
simultaneously image a portion of the adjacent second display screen region using an excitation laser beam emitted by a corresponding light engine module and a light engine module that corresponds to the adjacent display screen region.