Liquid crystal shutter, driving method of the same and image display system

A driving method of a liquid crystal shutter including;

• a first liquid crystal panel including a pair of electrode substrates and a liquid crystal layer held between the electrode substrates and covering a left eye sight, the first liquid crystal panel being switched between a transmissive state to pass incident light to left eye and a non-transmissive state to shut the incident light to the left eye;
• and
• a second liquid crystal panel including a pair of electrode substrates and a liquid crystal layer held between the electrode substrates and covering a right eye sight, the second liquid crystal panel being switched between a transmissive state to pass incident light to the right eye and a non-transmissive state to shut incident the light to the right eye;
• the driving method comprising the steps:
• switching the first and second liquid crystal panels between the transmissive state and the non-transmissive state by applying a voltage to the first and second liquid crystal panels, wherein the first liquid crystal panel is in the transmissive state when the second liquid crystal panel is in the non-transmissive state, and the first liquid crystal panel is in the non-transmissive state when the second liquid crystal panel is in the transmissive state;
• and
• carrying out a polarity inversion driving to invert the polarity of the voltage applied between the pair of the electrode substrates at least once during a period in the transmissive state for the respective first and second liquid crystal panels.

An image display system, comprising:

• a liquid crystal shutter including;
• a first liquid crystal panel including a pair of electrode substrates and a liquid crystal layer held between the electrode substrates and covering a left eye sight, the first liquid crystal panel being switched between a transmissive state to pass incident light to left eye and a non-transmissive state to shut the incident light to the left eye,
• a second liquid crystal panel including a pair of electrode substrates and a liquid crystal layer held between the electrode substrates and covering a right eye sight, the second liquid crystal panel being switched between a transmissive state to pass incident light to the right eye and a non-transmissive state to shut incident light to the right eye, and
• a driving circuit to switch the first and second liquid crystal panels between the transmissive state and the non-transmissive state by turns by applying a voltage to the first and second liquid crystal panels, and to invert the voltage applied between the pair of the electrode substrates of the respective first and second liquid crystal panels at least once during a period in the transmissive state, and
• a display device to display an image for left eye and an image for right eye by turns;
• wherein a three-dimensional image is displayed by a control of the driving circuit in which the driving circuit switches the first liquid crystal panel to the transmissive state, and the second liquid crystal panel to the non-transmissive state in synchronization to the displayed image for left eye, and switches the first liquid crystal panel to the non-transmissive state, and the second liquid crystal panel to the transmissive state in synchronization to the displayed image for right eye.

An image display system, comprising:

• a liquid crystal shutter including;
• a first liquid crystal panel including a pair of electrode substrates and a liquid crystal layer held between the electrode substrates and covering a left eye sight, the first liquid crystal panel being switched between a transmissive state to pass incident light to left eye and a non-transmissive state to shut the incident light to the left eye,
• a second liquid crystal panel including a pair of electrode substrates and a liquid crystal layer held between the electrode substrates and covering a right eye sight, the second liquid crystal panel being switched between a transmissive state to pass incident light to the right eye and a non-transmissive state to shut incident light to the right eye, and
• a driving circuit to switch the first and second liquid crystal panels between the transmissive state and the non-transmissive state by turns by applying a voltage to the first and second liquid crystal panels, and to invert a voltage applied between the pair of the electrode substrates of the respective first and second liquid crystal panels at least once during a period in the transmissive state, and
• a display device to display a first content image and a second content image by turns, wherein
• one of the first and second content images is displayed by a control of the driving circuit in which the driving circuit switches the first and second liquid crystal panels to the transmissive state in synchronization to one of the first content image display and the second content image display, and switches the first and second liquid crystal panels to the non-transmissive state in synchronization to the other of the first content image display and the second content image display.

A liquid crystal shutter comprising:

• a first liquid crystal panel including a pair of electrode substrates and a liquid crystal layer held between first and second electrode substrates and covering a left eye sight, the first liquid crystal panel being switched between a transmissive state to pass incident light to left eye and a non-transmissive state to shut incident light to the left eye;
• a second liquid crystal panel including a pair of electrode substrates and a liquid crystal layer held between the electrode substrates and covering a right eye sight, the second liquid crystal panel being switched between a transmissive state to pass incident light to the right eye and a non-transmissive state to shut incident light to the right eye;
• and
• a driving circuit to switch the first and second liquid crystal panels between the transmissive state and the non-transmissive state by turns by applying a first voltage to the first electrode substrate, and a second voltage to the second electrode substrate;
• wherein
• the first liquid crystal panel is in the transmissive state when the second liquid crystal panel is in the non-transmissive state, and the first liquid crystal panel is in the non-transmissive state when the second liquid crystal panel is in the transmissive state, and
• the first and second voltages are pulsed voltages, and the polarity of the first voltage and the second voltage are inverted at least once during a period in the transmissive state for the first and second liquid crystal panels.