Laser-based display with position sensitive detector
First Claim
1. A display apparatus comprising:
- a luminescent screen including a plurality of pixels, each pixel including a luminescent region comprising a luminescent material;
a position sensitive detector including a sensor mounted adjacent to the luminescent screen, and a detector circuit connected to the sensor; and
a laser system for directing a laser beam onto the luminescent screen and the sensor, and for controlling the laser beam in response to data received from the detector circuit such that the laser beam activates selected pixels of the plurality of pixels to produce a desired image, wherein the data is generated in response to a detected position of the laser beam on the sensor.
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Abstract
A display apparatus includes a luminescent screen having pixels formed from blue, green and red luminescent material that are selectively activated by a laser beam to generate a full color image. The display utilizes a closed loop laser scanning/modulating arrangement in which a Position Sensitive Device (PSD) located next to the screen is used to determine the location of the impinging beam, and to transmit timing/location data to the laser addressing system. The laser addressing system uses the timing/location data to adjust and/or modulate the laser beam, thereby generating high-energy beam pulses that activate the selected pixels. The PSD includes vertical strips located along the side edges of the screen, or a sheet that is located behind the screen and accessed, for example, by way of slits or apertures formed in the screen material. The PSD sheet is coupled to an optional power source to form a photon-multiplication device.
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Citations
18 Claims
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1. A display apparatus comprising:
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a luminescent screen including a plurality of pixels, each pixel including a luminescent region comprising a luminescent material;
a position sensitive detector including a sensor mounted adjacent to the luminescent screen, and a detector circuit connected to the sensor; and
a laser system for directing a laser beam onto the luminescent screen and the sensor, and for controlling the laser beam in response to data received from the detector circuit such that the laser beam activates selected pixels of the plurality of pixels to produce a desired image, wherein the data is generated in response to a detected position of the laser beam on the sensor. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
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17. A display apparatus comprising:
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a luminescent screen including a plurality of pixels, each pixel including a luminescent region comprising a luminescent material;
laser means for directing a laser beam onto the luminescent screen; and
means for detecting a location on the luminescent screen impinged by the laser beam, and for transmitting to the laser means data indicating the detected location. - View Dependent Claims (18)
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Specification