A diffractive optical modulator has been fabricated based on a micromachining process. Novel
properties of its fast response time and dynamics were fully understood and demonstrated for the
strong potentials in embedded mobile laser display. Bridged thin film piezo-actuators with so called
open mirror diffraction structure has been designed. Optical level package also was achieved to
successfully prove its display application qualities. Display circuits and driving logic were developed
to finally confirm the single-panel laser display at a 240Hz VGA (640×480). With its efficiency of
more than 75% and 13cc volume optical engine with the MEMS-based VGA resolution SOM
showed 7 lm brightness at a 1.5W electrical power consumption. Detailed design principle,
fabrication, packaging and performances of the invented SOM are described.
A new type of diffractive spatial optical modulators, named SOM, has been developed by Samsung Electro-Mechanics
for laser projection display. It exhibit inherent advantages of fast response time and high-performance light modulation,
suitable for high quality embedded laser projection displays. The calculated efficiency and contrast ratio are 75 % and
800:1 respectively in case of 0th order, 67 % and 1000:1 respectively in case of ±1st order. The response time is as fast as
0.7 &mgr;s. Also we get the displacement of 400 nm enough to display full color with single panel in VGA format, as being
10 V driven. Optical module with VGA was successfully demonstrated for its potential applications in mobile laser
projection display such as cellular phone, digital still camera and note PC product. Electrical power consumption is less
than 2 W, volume is less than 13 cc. Brightness is enough to watch TV and movie in the open air, being variable up to 6
lm. Even if it's optimal diagonal image size is 10 inch, image quality does not deteriorate in the range of 5 to 50 inch
because of the merit of focus-free. Due to 100 % fill factor, the image is seamless so as to be unpleasant to see the every
pixel's partition. High speed of response time can make full color display with 24-bit gray scale and cause no scan line
artifact, better than any other devices.
Access to the requested content is limited to institutions that have purchased or subscribe to SPIE eBooks.
You are receiving this notice because your organization may not have SPIE eBooks access.*
*Shibboleth/Open Athens users─please
sign in
to access your institution's subscriptions.
To obtain this item, you may purchase the complete book in print or electronic format on
SPIE.org.
INSTITUTIONAL Select your institution to access the SPIE Digital Library.
PERSONAL Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.