Normally in LCD displays, the pixel potential polarity of the LCD cell must be inversely driven to prevent video image retention.
Conventional LCD displays employ the horizontal line inversion drive system that inverts the pixel potential polarity every pixel line, which is optimum for 60 Hz drive. However, in this case a horizontal electric field is generated between pixel electrodes as shown in (1). This disrupts the LCD alignment, so the optimum LCD array for white display cannot be obtained and the light transmittance drops.
In contrast, the 1 field inversion drive system employed by “BrightEra” devices inverts the pixel potential polarity every field.
This decreases the electric field between pixel electrodes, making it possible to obtain the most efficient LCD array for white display as well as high transmittance. In addition, the use of leading-edge fine fabrication technology reduces the TFT element area by approximately 70% compared to the conventional method as shown in (2). This makes it possible to reduce the electric wiring pitch, and increases the aperture ratio by approximately 20% compared to the conventional method.