We developed a waveguide liquid crystal display from a liquid crystal (LC)/polymer composite. It does not need polarizers or color filters. It is illuminated by color LEDs installed on its edge. The light produced by the edge LEDs is coupled into the display and then waveguided through the display. When the LC is in the transparent state, the incident light is waveguided through and no light comes out of the viewing side of the display. When the LC is in the scattering state, the incident light is scattered and comes out of the display. It can be used either for transparent display or for direct view display. The composite has a submillisecond response time, and a field sequential scheme can be used to display full color images. Because the display does not need polarizers or color filters, its energy efficiency is much higher than current liquid crystal displays.

Articles you may be interested inFully leaky guided mode study of the flexoelectric effect and surface polarization in hybrid aligned nematic cells Determination of the direction of the "easy" axis at a twisted nematic liquid crystal-wall using half-leaky guided modes Quantification of the surface-and bulk-order parameters of a homogeneously aligned nematic liquid crystal using fully leaky guided modes J. Appl. Phys. 86, 6682 (1999); 10.1063/1.371744Half-leaky guided wave determination of azimuthal anchoring energy and twist elastic constant of a homogeneously aligned nematic liquid crystal

We have developed the UHD 4K*2K resolution large‐size oxide TFT‐LCD TV with ADSDS (Advanced Super Dimension Switch) technology. The pixel aperture ratio and panel transmission could be increased and the voltage shift could be reduced by the new pixel design and process optimization. Meanwhile, the mask reduction process is suitable for large‐scale production line.

We demonstrated that polymer stabilization can significantly improve the response time of in‐plane‐switching liquid crystal display. We carried out a systematic study of the effect of polymer networks on the performance of in‐plane‐switching liquid crystal display. The polymer network has a strong aligning effect on the liquid crystal and has the advantage of reducing the switching time of the display but may have the disadvantage of ruining the contrast ratio because of its scattering effect. Through optimization, we successfully improve the switching time (less than 6 ms) and reduce the scattering and thus retain high contrast ratio (higher than 1000:1).

We developed a switchable diffuser for transparent liquid crystal displays. The diffuser is based on polymer stabilized cholesteric texture (PSCT) light shutter. It can be switched between a transparent state and a milky scattering state by applying voltages. The transmittance of the transparent stateis near 90%. The reflectance of the scattering state is higher than 30%. We also developed a transparent ADS display with the PSCT, which has excellent viewing angle.