Introduction to TFT LCD IPS Lateral Electric Field Effect Display Technology
The development of IPS TFT display screen is aimed at improving the problems of poor viewing angle and insufficient color expression of ordinary TN display screen The movement of liquid crystal molecules is parallel to the glass substrate, not perpendicu
The development of IPS TFT display screen is aimed at improving the problems of poor viewing angle and insufficient color expression of ordinary TN display screen. The movement of liquid crystal molecules is parallel to the glass substrate, not perpendicular. This change can reduce the scattering of light in the pixel matrix and provide a wider viewing angle and better color expression. Due to its wider viewing angle and more accurate color rendering (with almost no color difference), IPS displays are widely used in high-end monitors for professional graphics processing.
The name IPS comes from the fact that liquid crystal molecules are parallel to the glass substrate inside IPS glass, and always parallel to the glass substrate (if electrode interference is not considered). When voltage is applied to the glass, all the liquid crystal molecules inside the box rotate 90 degrees. By the way, IPS glass allows light to pass through in an activated state, while blocking it in a passive state (i.e. without pressure). Therefore, if a thin film transistor breaks, the corresponding pixel will remain in a black state, which is different from ordinary TN glass.
IPS can provide stable and accurate color representation from all viewing angles without display blur or grayscale inversion. It can also display clear images in a fast response time, and there will be no halo effect when touching the screen. Each pixel in an IPS display screen contains three sub pixels (red, green, and blue), each of which has a pair of electrodes to control the flipping of the liquid crystal. Unlike ordinary TN type TFTs, where the electrodes are only located on the upper and lower glass substrates, the electrodes in IPS are only located on one glass substrate. When a voltage is applied to the electrodes, all liquid crystal molecules align parallel to the substrate and allow light to pass through the polarizer and color filter. In fact, TN display screens force liquid crystal molecules to be perpendicular to the glass, blocking the passage of light over a wider viewing angle, while IPS display screens have liquid crystal molecules arranged in straight lines, allowing light to pass through from all viewing angles.
