Patent ID: 9607580
Date: 2017-03-28
CPC Classifications: G09G,H04N

Claim:
1. A stereoscopic image display comprising: a display panel including data lines, gate lines crossing the data lines, a discharge control line, and a plurality of pixels, each of the plurality of pixels being divided into a main display unit and an auxiliary display unit; a data driving circuit configured to supply a data voltage of a two-dimensional plane (2D) image to the data lines in a 2D mode and supply a data voltage of a three-dimensional plane (3D) image to the data lines in a 3D mode; a gate driving circuit configured to sequentially supply a scan pulse, which swings between a gate low voltage and a gate high voltage, to the gate lines in the 2D mode and the 3D mode; a control voltage generator configured to generate a discharge control voltage that is substantially equal to the gate low voltage in an “on” duty cycle when in the 2D mode, and generate the discharge control voltage when in the 3D mode to be applied to the discharge control line only at a slight-on level in the “on” duty cycle, which the slight-on level is higher than the gate low voltage and is lower than the gate high voltage, and periodically reduce the discharge control voltage to a level of the gate low voltage in the 3D mode, wherein the discharge control voltage for both the 2D mode and the 3D mode in a remaining “off” cycle is at the level of the gate low voltage at predetermined time intervals, the slight-on level being a peak voltage of a waveform applied to the discharge control line only when in the 3D mode; and a control voltage compensator configured to receive the discharge control voltage from the control voltage generator, amplify a feedback discharge control voltage supplied from a first part of the display panel based on the received discharge control voltage, and apply the amplified feedback discharge control voltage, as a compensated discharge control voltage, to a second part opposite the first part of the display panel.