The system is made up by silicon crystal oscillator,frequency divider,number counter,decipherer,LED indicator and calibrated circuit and utilizes the medium-sized and small-sized integruted chip of CMOS series(double-row plug-in).
The paper pointed that adoption lowered the scanning frequency,and enlarging the pulse light of function time to naked eyes and enlarging the drive electric current could increase the bright degree of the LED displayer.
Limit current resistance on LED display unit can be replaced with stable voltage circuit LM317 with triends adjustable positive voltage output in LED circuit. This junction is of Unique characteristic when it drives a proper quantity of LED.
Experiments on distance perception of stereoscopic targets have been conducted with the stereoscopic LED displays using parallax barriers, as well as a stereoscopic LED display using polarizing eyewear.
The small size, only four command switches and the six-digit LED display for parameter presentation make the instrument easy for use in the clinic.
You might note that the LED display does not form every character of the alphabet completely, so you have to do a little creative interpretation.
You will see this as you view the pictures of the LED display as you review these instructions.
A hard event will be evident by a solid pulsing of the converter and a brief flash of digit on the LED display.