three screens of the TP3106-70 clear facial images for the middle of the first
row, but vague facial images for the two sides and the second row.
TP3106-70 has three screens lined up in a single row. Therefore, when the TC330
camera focuses on the first row, the facial images are clearly displayed.
However, if a chair with high-density grid stripes is placed in the second row,
the moire effect occurs when the camera tries to focus. This problem can be
rectified by replacing such chairs with other normal chairs.