Patent ID: 8982196
Filing Date: 2015-03-17
Classification: G02B,G09G,H04N

Abstract:
1. A stereoscopic image display device comprising: a display panel including gate lines and data lines crossing over each other, thin film transistors (TFTs) formed at crossing areas of the gate and data lines, pixel electrodes connected to the TFTs defined by the gate and data lines, and a common electrode of the display panel corresponding to the pixel electrodes, the display panel being controlled so that image frame data are stored on the display panel for frame intervals; a polarization control panel, which is separate from the display panel and positioned on the display panel and converts a polarization state of light passing through the display panel according to a first driving voltage and a second driving voltage, wherein the polarization control panel is synchronized with the intervals when the image frame data is stored on the display panel; a backlight unit emitting light during blank intervals between the frame intervals such that the display panel displays the image frame data only during the blank intervals after the polarization control panel is converted into one of a left eye polarization state and a right eye polarization state, wherein the blank intervals are vertical intervals in which the image frame data and data enable signals are not supplied; and polarization glasses, which create stereoscopic images by restricting the light converted by the polarization control panel, wherein the polarization control panel includes a first substrate on which at least one scan electrode is formed, a second substrate on which a common electrode of the polarization control panel is formed, and a liquid crystal layer disposed therebetween, wherein a common voltage is applied to the common electrode of the display panel and the common electrode of the polarization control panel, and wherein the first driving voltage is any one of a positive voltage and a negative voltage having a predetermined voltage difference to the common voltage, the second driving voltage is another one of the positive and negative voltages, and the first and second driving voltage are applied to the scan electrode of the polarization control panel, wherein the polarization control panel is converted into one of the left eye polarization state and the right eye polarization state in response to the first driving voltage and converted into the other one of the left eye polarization state and the right eye polarization state in response to the second driving voltage before the backlight unit supplies the light to the display panel, and wherein the back light unit emits the light for a light emitting interval exceeding a reference time and the reference time is a predetermined delayed time generated when a stereoscopic image is displayed and the reference time is less than half the sum of the frame interval and the blank interval.