Patent ID: 8854437

Claim:
A double-layer switchable stereo liquid crystal display, comprising: a timing controller for receiving an image signal, and generating a left/right eye signal and a two-dimensional/three-dimensional control signal according to the image signal; a microprocessor coupled to the timing controller for outputting the image signal according to the left/right eye signal and the two-dimensional/three-dimensional control signal, and outputting a control signal and a backlight control signal corresponding to a vertical blanking interval according to output timing of the image signal; a backlight module coupled to the microprocessor for turning on backlight according to the backlight control signal; a first liquid crystal panel coupled to the microprocessor for receiving and displaying the image signal; a controller coupled to the microprocessor for outputting a voltage control signal according to the control signal; and a second liquid crystal panel coupled to the controller for rotating liquid crystals within the second liquid crystal panel to a first angle or a second angle according to the voltage control signal, wherein a period for the second liquid crystal panel starting to be charged to rotate the liquid crystals within the second liquid crystal panel to the second angle according to the voltage control signal is longer than a period for the second liquid crystal panel starting to be discharged to rotate the liquid crystals within the second liquid crystal panel to the first angle according to the voltage control signal.