Patent ID: 6483090
Filing Date: 2002-11-19
Classification: A61F,G01J,G02F

Abstract:
A glare protecting device for protecting a worker's eyes from a light, comprising:a glare protecting plate, an optical transmission of which is adjusted by a driving voltage supplied depending on an ambient temperature; a temperature sensor for generating a temperature signal by detecting the ambient temperature; a controller for generating a starting signal for triggering a starting voltage which decreases the optical transmission of said glare protecting plate during a predetermined starting time, wherein the starting signal comprises a duration determining the duration of the starting time in response to said temperature signal; for generating a temperature compensating signal corresponding to said temperature signal; and for generating a driving control signal controlling a continuous operation of said glare protecting plate; and a driving means for operating said glare protecting plate, wherein said driving means inputs said starting voltage in response to said starting signal or inputs a driving voltage in response to said driving control to said glare protecting plate; wherein a voltage level of said starting voltage is controlled by said temperature compensating signal, so that said starting voltage is increased according to a falling of the ambient temperature and does not exceed more than 30% of a reference starting voltage with which said glare protecting plate is operated at a non-changed ambient temperature.