We demonstrate a polymer-stabilized blue-phase liquid crystal device (PS-BPLC), which can be driven by a vertical electric field by transforming normal incident beams into oblique ones. By attaching prism sheets to the cell, the high operating voltage and low transmittance issues on the PS-BPLC employing conventional in-plane field switching modes can be solved simply. The normal brightness can be enhanced by using two prism sheets on top and bottom substrates, respectively.
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