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US 2013/0293591 A1Published application
Projector with Shutter
AssigneeMicrovision, Inc.
InventorsJoshua O. Miller, Scott Woltman
Life of this patent
Estimating the term…
Abstract
A projection apparatus includes a shutter mechanism to prevent light from reaching an image plane during calibration of light sources. The shutter mechanism may include liquid crystal material that exhibits an effective index of refraction that varies with applied voltage. During calibration, a light beam is shuttered, light sources are driven by calibration data, and optical power is measured.
Claims25
A method comprising:
- generating a light beam modulated by pixel data;
- scanning the light beam to generate an image;
- shuttering the light beam during a period in which no pixel data is present;
- modulating the light beam with calibration data while shuttered.
1 more element
An apparatus comprising:
- a laser light source;
- a scanning mirror to reflect light from the laser light source and to scan the light onto an image plane;
- a shutter mechanism to conditionally block light from reaching the image plane;
- and
- a control component to activate the shutter mechanism and drive the laser light source with calibration data.
2 more elements
A mobile device comprising:
- a scanning laser projector that includes a liquid crystal shuttering mechanism to block light from leaving the mobile device during a calibration period.
Dependencies are inferred from the claim text.