Browse Prior Art Database

Compensation Scheme to Reduce Vibration Induced Blurring of Displays

IP.com Disclosure Number: IPCOM000109077D
Original Publication Date: 1992-Jul-01
Included in the Prior Art Database: 2005-Mar-23
Document File: 2 page(s) / 68K

Publishing Venue

IBM

Related People

Kwark, YH: AUTHOR

Abstract

Attempting to read a visual display in a high vibration environment (e.g., a moving car or truck, an airplane in turbulence, vibrating machinery) can quickly lead to visual fatigue due to blurring of the display. This invention proposes to measure the relative displacement of the observer's eyes and the display, and to use this information to compensate for the relative motion, thereby producing a stable image.

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Compensation Scheme to Reduce Vibration Induced Blurring of Displays

       Attempting to read a visual display in a high vibration
environment (e.g., a moving car or truck, an airplane in turbulence,
vibrating machinery) can quickly lead to visual fatigue due to
blurring of the display.  This invention proposes to measure the
relative displacement of the observer's eyes and the display, and to
use this information to compensate for the relative motion, thereby
producing a stable image.

      The displacement of the display unit (e.g., CRT or LCD display)
relative to the observer's eyes can be determined by doubly
integrating the output with respect to time of two sets of
accelerometers.  One set is attached to the inertial reference frame
of the display, the other set to the reference frame of the
observer's eyes.  The axis of the accelerometers of each of the two
sets would optimally be mutually orthogonal, and perpendicular to the
observer-display axis as shown in the  figure.  Both sets can be
implemented in miniaturized form in silicon technology.  The set
attached to the observer could be clipped on to eyeglasses or worn as
a small headband.  The output of the observer's accelerometer could
be fed via a wireless RF or infrared link to the display compensation
controller.

      The display compensation controller can use this information to
compensate for the relative displacement via appropriate adjustments
to, e.g., the video synchronization pul...