Creative Wearable Design - paper abstract - with figure illustrations

1. Auto-Lux-Adaptive Pupil-Adjustment Glasses
Haowei. Jiang, #5016-6365, haoweiji@buffalo.edu
EE526LEC000: Wearable & Implantable Sensors, Department of Electrical Engineering,
University at Buffalo, The State University of New York (SUNY at Buffalo), Buffalo, New York 14260, USA
Background: By applying the circular filter plate, the polarization effect can be secured in the glasses. A color-
sensitive, UV-blocking lenses can be additively inter-laced with silver-halide polymer to achieve a better eye-
comfort under exposure to high actinic radiation [1]
. Interference films could also be surface-layered to generate the
iridescent effect which is visible to outsiders but wearers [2]
. A new method, ALAPA, is proposed to improve the
overall adaptiveness to sudden lightness change based on external LUX and pupil size.
Working Principle/Design: The work-flow schematic is shown in (Fig. 1). The pupil dilates/shrinks when exposed
to dark/ high light intensity environment. The diameter difference is tracked by the embedded pinhole camera using
eye/pupil detection method [3]
(Fig. 2 & Fig. 3). At the meantime, the external LUX is detected by ALS (Automatic
LUX Sensor) and then sent to adjust the angle of circular polarizer (rotatable & controlled by CPU, the larger angle
is, the less LUX passing through) together with the transformed pupil sense message (which also functions as a
compensatory signal to the liquid crystal layer), allowing certain amount of LUX passing through and reach the
pupil end to ensure a relatively stable pupil size under pre-set-able LUX environment. (Fig. 4) demonstrates the
lenses layer deign.
Expected Outcomes/Impacts: we pre-set the LUX parameter (80 LUX - level 6 - toilet lighting) by pressing the
LUX-lock button when the tester’s pupils are adaptive to test environment (the initial diameter is about 4mm with
pre-set LUX). The LUX level-step curve shows on (Fig. 5). In the Blank setting, we trace both left & right pupil
diameter change following the LUX curve without ALAPA glasses, with it in the experiment group. When it comes
to the comparison (Fig. 6), we find that both left & right pupil get narrow as LUX level goes up in the blank group.
While in the experiment set, there are just a little variation according to the diameter change and its value is
stabilized around 4mm with no 10% error range exceeding.
We could also refer to the angle change of circular polarizer and luminance compensation from the liquid crystal
layer (Fig. 7) that the angle is proportional to the LUX level which follows the working principles and the
compensation mechanism only works as the LUX level goes higher than level-8, generating a LUX level down
voltage signal to liquid crystal layer, changing its transmittance.
Conclusion: we have figured out an achievable way to adjust the human pupil size matched comfort light
surroundings using the pupil detection & adaptive polarization. This design will be health-oriented for those who
suffer extreme light changes and back for the growing fashion.
Word Count: 441
[1] Joseph E. Pierson, Stanley D. Stookey, 1976. Method for Making Photosensitive Colored Glasses. US736,517.
[2] Michael Black, Vladimir Kupershmidt, 1991. Liquid Crystal Sunglasses with Selectively Color Adjustable
lenses. US640,042.
[3] Cho C. W, Lee J. W, Lee E. C, Park K. R, A Robust Gaze Tracking Method by Using Frontal Viewing and
Eye Tracking Camera. Optical Engineering, 2009, 48: 127202-127202-15.

2. Fig. 2 Overall Procedure of the proposed eye/pupil
detection method [3]
.
Fig. 1 ALAPA Work-Flow Schematic.
Fig. 4 Layers Structure. (From right to left - incident light
direction) Liquid Crystal surfaced with Interference Film
→ Silver Halide Polymer → Linear Polarizer + Quarter
Wave Plate (Circular Polarizer).
Fig. 5 LUX Level-step Curve in logarithms.
Fig. 6 Left & Right Pupil Diameter Comparison.
Fig. 7 Angle change of circular polarizer and luminance
compensation from the liquid crystal layer
Fig. 3 ALAPA Glasses model with pinhole camera in
the center.