A single‐cell‐gap transflective LCD using active‐level‐shift technology

Abstract— A single‐cell‐gap transflective LCD using active‐level‐shift (ALS) technology has been developed and is presented. An efficient pixel architecture has recently been designed to apply different voltages on transmissive and reflective subpixels through two separated storage capacitors, formed by a boosting electrode and pixel electrodes. A 2.2‐in. vertical‐alignment‐mode (VA) transflective LCD prototype with a similar gamma for both the transmissive and reflective areas was obtained. Compared to a conventional dual‐cell‐gap design, the new single‐cell‐gap design achieves a 17% higher aperture ratio and the contrast increased from 200:1 to 500:1.