Display systems having screens with optical fluorescent materials
AssigneePrysm, Inc.
InventorsRoger A. Hajjar, David Kent, Phillip H. Malyak
Life of this patent
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Abstract
Fluorescent screens and display systems and devices based on such screens using at least one excitation optical beam to excite one or more fluorescent materials on a screen which emit light to form images. The fluorescent materials may include phosphor materials and non-phosphor materials such as quantum dots. A screen may include a multi-layer dichroic layer.
Claims20
A display system, comprising:
- a screen including a substrate on which a plurality of parallel fluorescent stripes are formed to be along a first direction and spaced from one another along a second direction distinct from the first direction, wherein adjacent fluorescent stripes are made of different fluorescent materials that absorb light at an excitation wavelength to emit light of different colors, respectively;
- an optical module to produce a plurality of excitation optical beams of light at the excitation wavelength, wherein each excitation optical beam is modulated to carry image data of different colors and the excitation optical beams collectively carry multi-colored image data for an image to be displayed on the screen,
- wherein the optical module includes a beam scanning mechanism that scans, along the second direction, the excitation optical beams on to the screen at different and adjacent screen positions along the first direction in one screen segment of the screen, to produce different scan lines along the second direction, respectively, in the screen segment, to cause the screen to emit light at different times at different positions in each scan line along the second direction and, to shift the excitation optical beams to other screen segments at different positions in the screen along the first direction, one screen segment at a time, to render images on the entirety of the screen;
- one or more optical sensors to detect light from the screen;
- and
- a feedback control loop that directs output of the one or more optical sensors to the optical module as a feedback signal,
- wherein the optical module responds to the feedback signal to detect an alignment error of the excitation beam on the screen, and, in response to the detected alignment error, the optical module operates to control the excitation beam to correct the detected alignment error.
A method for displaying images on a screen that includes a substrate on which a plurality of parallel fluorescent stripes are formed to be along a first direction and spaced from one another along a second direction distinct from the first direction, wherein adjacent fluorescent stripes are made of different fluorescent materials that absorb light at an excitation wavelength to emit light of different colors, respectively, the method comprising:
- producing a plurality of excitation optical beams of light at the excitation wavelength so that each excitation optical beam is modulated to carry image data of different colors and the excitation optical beams collectively carry multi-colored image data for an image to be displayed on the screen,
- scanning the excitation optical beams onto the screen along the second direction, at different and adjacent screen positions along the first direction in one screen segment of the screen, to produce different scan lines along the second direction, respectively, in the screen segment, to cause the screen to emit light at different times at different positions in each scan line along the second direction and,
- shifting the excitation optical beams to other screen segments at different positions in the screen along the first direction, one screen segment at a time, render images on the entirety of the screen;
- using one or more optical sensors to detect light from the screen for indicating spatial alignment of the excitation optical beams on the screen with respect to parallel fluorescent stripes along the second direction;
- operating a feedback control loop that directs output of the one or more optical sensors as a feedback signal indicating the spatial alignment of the excitation optical beams on the screen with respect to parallel fluorescent stripes along the second direction;
- in response to the feedback signal, processing the feedback signal to detect an alignment error of each excitation beam on the screen;
- and
- in response to the detected alignment error, controlling each excitation beam to correct the detected alignment error.
Dependencies are inferred from the claim text.