Scanning limitations of liquid-crystal displays

12.4: Distinguished Student Paper: Passive‐Matrix‐Driven Field‐Sequential‐Color LCD

“…The optical performance of SST is similar to TN mode, it exhibits normally dark state [5]. In order to obtain FSC display, the traditional time averaging multiplexing driving method, such as 3:1, Alt and Pleshko [6,7] or active addressing method [8,9] is not applicable. Instead of that, single pulse pixel addressing should be considered.…”

Liquid crystal displays, LC-materials and LPP photo-alignment

“…In 1974 the information content could be increased thanks to the introduction of time-multiplexing by Alt and Pleshko and Kawakami et al [22,23]. This, and the development of LC-materials with steeper electro-optical characteristics broadened the range of TN-LCD applications from directly addressed seven-segment digital watch displays to pocket calculators, portable games, first office and outdoor applications (Fig.…”

Binary Addressing Technique With Duty Cycle Control for LCDs

“…Duty cycle control has an added advantage of improving brightness uniformity of pixels in the display as discussed in the Section IV. The number of times a pixel gets a voltage that is favorable to its state during a cycle is given by (2) These equations have been derived in [6]. The expression for the RMS voltage across ON pixels when a display is scanned by BAT with duty-cycle control is RMS…”

“…For example, the most popular line-by-line addressing technique [1] has four voltage levels in scanning as well as the data waveforms. Conventional line-by-line addressing technique [2] and the multiline addressing techniques like the Improved Hybrid Addressing Technique [3] and Sequency Addressing Technique [4] have three voltage levels in the scanning waveforms and two or more voltage levels in the data waveforms. The Active Addressing Technique [5] has two voltage levels in the row waveforms but a large number of voltages in the column waveforms.…”