| 摘要 |
A light diffusion element includes a liquid-crystal diffusion layer that variably diffuses an amount of light depending on an applied voltage, a first electrode that is laid on a plane of the light diffusion layer and made of a first and a second segmented-electrodes, a second electrode that is laid on the other plane of the light diffusion layer, a voltage applying unit that generates and applies two types of voltages, and a voltage changing unit that varies the two types of voltages. One of the voltages is applied between the first segmented-electrodes and the second electrode, and the other between the second segmented-electrodes and the second electrode. Both the segmented-electrodes are included in each pixel.
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