Liquid crystal shutter device for a camera

A camera comprising:

• a lens module;
• and
• a liquid crystal shutter located in front of the lens module, the liquid crystal shutter including:
• a power supply;
• a switch;
• a liquid crystal box connected to the power supply and the switch, the liquid crystal box including:
• a first electric plate having a plurality of first parallel grooves defined therein;
• a first polarizing filter formed on a surface of the first electric plate, an extending direction of the first parallel grooves of the first electric plate being the same as an axial direction of the first polarizing filter;
• a second electric plate parallel to the first electric plate, the second electric plate having a plurality of second parallel grooves defined therein, an extending direction of the second parallel grooves being perpendicular to that of the first parallel grooves;
• a second polarizing filter, the axial direction of the second polarizing filter being perpendicular to that of the first polarizing filter, the second polarizing filter being formed on a surface of the second electric plate;
• and
• a predetermined amount of liquid crystal contained between the first electric plate and the second electric plate;
• wherein the power supply, the switch, and the liquid crystal box are electrically connected in series and form a control circuit, and wherein the control circuit further includes a rheostat capable of adjusting the voltage between the first electric plate and the second electric plate.

A liquid crystal shutter device for a camera, comprising;

• a first transparent electric plate with a plurality of first parallel grooves formed in one surface thereof;
• a first transparent polarizing filter formed an opposite surface of the first electric plate, the first polarizing filter having a first optical axis parallel to the first grooves;
• a second transparent electric plate spaced from and parallel to the first electric plate, the second electric plate having a plurality of second parallel grooves formed in one surface thereof, the second grooves being substantially perpendicular to the first grooves, the surfaces of the first and second electric plates that form the first and second grooves facing each other;
• a second transparent polarizing filter formed on an opposite surface of the second electric plate, the second polarizing filter having a second optical axis parallel to the second grooves;
• a predetermined amount of liquid crystal molecules contained between the first electric plate and the second electric plate;
• and
• a switch circuit connected to the first and second electric plates so as to selectively establish an electric field between the first and second electric plates for changing a direction of the liquid crystal molecules, thereby selectively allowing the rays of light to pass through and stopping the rays of light from passing trough the first and second polarizing filters.