Electro-optical device

Abstract

Abstract PURPOSE:To obtain the same color state as the background part at the time of discharge and to raise a virtual contrast by constituting so that thickness of a layer having a liquid crystal of a background area is made smaller than a spiral pitch, and also the surface contacting with an electrode plate of the liquid crystal is subjected to a horizontal orientation processing. CONSTITUTION:When no voltage is applied, liquid crystals 5, 5' and dichromatic coloring matters 6, 6', which are oriented by a spiral structure are pinch-held between substrates 1, 2. A pair of electrodes 4 are placed in a display area, and a non-display area has a projecting surface 3 and forms a small space. As for thickness of the liquid crystal 5, about 1-2mu which is smaller than a spiral pitch is desirable. As for thickness of the liquid crystal 5' of the display area, about 6-10mu is suitable. When a switch 7 is operated, the liquid crystal 5' is oriented in the electric field direction, and as a result, it is discharged, and can be made the same degree substantially as a coloring degree of the non-display area. As for the liquid crystal, a chiral nematic liquid crystal, a cholesteric liquid crystal or a mixed liquid crystal of these liquid crystals and a nematic liquid crystal is used.

Inventors

• 👤 Makoto Ogura
• 👤 誠 小倉

Bibliographic Details