Patent ID: 8102490
Filing Date: 2012-01-24
Classification: G02F

Abstract:
1. A display element using a cholesteric liquid crystal possessing bistability states including a color reflection state and a transparent state, comprising: a pair of counter electrodes, one counter electrode of the pair of counter electrodes having a first electrode surface, another counter electrode of the pair of counter electrodes having a second electrode surface opposing the first electrode surface, the pair of counter electrodes applying a drive voltage to the cholesteric liquid crystal positioned between the first electrode surface and the second electrode surface; and a film of a pattern feature for displaying, formed on a portion of the first electrode surface, wherein the counter electrodes create a potential difference between the first electrode surface and the second electrode surface, and states of the cholesteric liquid crystal transit from a color reflection state to a transparent state, or vice versa, only in a first area between the film and the second electrode surface or a second area between the first electrode surface excluding a region where the film is formed and the second electrode surface so as to display the pattern feature in accordance with an electric field strength difference between a first electric field strength generated at the first area by the potential difference and a second electric field strength generated at the second area by the potential difference, the electric field strength difference being brought by the film formed on the portion of the first electrode surface.