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A new type of liquid crystal display (LCD) is invented. Common LCDs are transmissive with a front and a back polarizer. For viewing in reflection, a diffuser and a mirror are added to the back of the LCD. The new LCD is a true reflective LCD where there is no rear polarizer. The LCD is simple in..... [更多]
This invention discloses an alternative approach of electrically tuning silicon-based waveguide-coupled microresonators that employs photoaligned liquid crystals as cladding layers. Planar optical microresonators that partially confine light and support sharp optical resonances have long been demon..... [更多]
Photonic band gap (PBG) materials are those periodic composites that possess spectral gaps in the frequency spectrum, in which electromagnetic waves cannot propagate in any direction within the material. Conventional PBG are based on Bragg scattering which limits the size of PBG structures for low-f..... [更多]
Tags: Physics
Portable electronic devices such as laptop computers, personal digital assistants, and portable DVD players and the like have become increasingly common and popular. One reason for the success of such devices is the advance in the technology of low power, lightweight and inexpensive flat-panel displ..... [更多]
A switch capacitor power converter, also known as a charge pump, is a component in the circuit that generates a high voltage using a low input voltage supply that provides power to a load using switches and capacitors. However, existing charge pumps involve too many capacitors and transistors and th..... [更多]
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