Liquid Crystal on Silicon micro display
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This is a video clip showing the performance of our home-made LCoS micro-display, which has 320x280 pixels within 6x7mm2 area.
LCoS is the acronym of “liquid crystal on silicon”. Different from the normal TFT(thin film transistor)-LCD, The transistors for driving pixels for LCoS are directly made on a silicon substrate. As the electron mobility of the silicon crystal is much better than that of silicon thin film, the transistors of the LCoS can be made much smaller in size. Therefore, comparing with normal TFT-LCD, LCoS can realize much higher display resolution and effective display area ratio. Moreover, the LCoS is working on a special reflective display mode with only one polarizer (in contrast with the two polarizers for normal TFT-LCD), its cell gap can be made less than half of that for normal LCD. The thin cell thickness gives LCoS the advantage of shorter response time. LCoS has applications in head mount display, projector and spatial phase modulator etc. For the LCoS panel displayed here, my role is in charge of the design and fabrication of the LCoS cell. |
A batch production process was developed. And the optimization method for the parameters of the LCoS cell was shown in the paper: Generalized optimization of reflective liquid crystal display for direct-view and single-panel projection applications.
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