Toppan Printing Co., Ltd.

Koichi Makidai

Akiko Nagai

Tetsushi Yoshida

Yasushi Hayashida

A light control sheet including a first transparent electrode, a second transparent electrode, a first light control layer positioned between the first and second transparent electrodes, and having light transmission property which is variable by a change in a voltage across the first and second transparent electrodes, and a voltage control unit which applies an AC voltage across the first and second transparent electrodes, and changes a frequency of the AC voltage applied.

Light control sheets and imaging systems

A light control module including a light control sheet and a drive circuit that applies a voltage to a first electrode and a second electrode of the light control sheet. The light control sheet includes a light control layer switchable between a transparent state and an opaque state according to an applied voltage. The light control sheet has a feeding area for applying a voltage to the first and second electrodes. The light control sheet is formed such that when the light control sheet receives a voltage that causes a transmittance of the light control sheet to be equivalent to a Munsell value of 90% in a region closest to the feeding area, the light control sheet has a transmittance equivalent to a Munsell value of 50% in a region farthest from the feeding area, where a Munsell value of 100% is a maximum transmittance of the light control sheet.

Growing community of inventors

Taito-ku, Japan

Koichi Makidai