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1. WO2014178978 - HIGH EFFICIENCY LASER MODULATION

Publication Number WO/2014/178978
Publication Date 06.11.2014
International Application No. PCT/US2014/032536
International Filing Date 01.04.2014
IPC
G02B 26/10 2006.1
GPHYSICS
02OPTICS
BOPTICAL ELEMENTS, SYSTEMS, OR APPARATUS
26Optical devices or arrangements using movable or deformable optical elements for controlling the intensity, colour, phase, polarisation or direction of light, e.g. switching, gating or modulating
08for controlling the direction of light
10Scanning systems
G03B 21/14 2006.1
GPHYSICS
03PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
BAPPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
21Projectors or projection-type viewers; Accessories therefor
14Details
CPC
H01S 5/0427
HELECTRICITY
01BASIC ELECTRIC ELEMENTS
SDEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
5Semiconductor lasers
04Processes or apparatus for excitation, e.g. pumping, ; e.g. by electron beams
042Electrical excitation ; ; Circuits therefor
0427for applying modulation to the laser
H04N 9/3135
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
NPICTORIAL COMMUNICATION, e.g. TELEVISION
9Details of colour television systems
12Picture reproducers
31Projection devices for colour picture display ; , e.g. using electronic spatial light modulators [ESLM]
3129scanning a light beam on the display screen
3135Driving therefor
Applicants
  • MICROVISION, INC. [US]/[US]
Inventors
  • WOLTMAN, Scott
  • JACKSON, Robert James
  • ADKINS, Christopher Brian
Agents
  • WILLS, Kevin D.
Priority Data
13/875,82102.05.2013US
Publication Language English (en)
Filing Language English (EN)
Designated States
Title
(EN) HIGH EFFICIENCY LASER MODULATION
(FR) MODULATION D'UN LASER À HAUTE EFFICACITÉ
Abstract
(EN) A scanning laser projector (100) drives laser light sources with waveforms for higher efficiency. Optical light power values for pixels are mapped to amplitude/duration pairs. Laser diodes are driven with electrical currents having the amplitude for time period specified by the duration. For increasing optical light power values, amplitude values are increased, and then durations are increased.
(FR) L'invention concerne un projecteur à balayage laser (100) qui entraîne des sources de lumière laser avec des formes d'ondes pour une plus grande efficacité. Des valeurs de puissance de lumière optique pour pixels sont mises en correspondance avec des couples amplitude/durée. Des diodes laser sont excitées par des courants électriques ayant l'amplitude d'une période de temps spécifiée par la durée. Afin d'augmenter les valeurs de puissance de lumière optique, les valeurs d'amplitude sont augmentées, et ensuite les durées sont augmentées.
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