Electrochromic display device using a leuco dye and a passive matrix

摘要

Disclosed is an electrochromic display device (100) comprising: a first substrate (10); a first electrode (20); a second substrate (30); a second electrode (40); and an electrochromic composition layer (50), wherein the device is of a passive matrix drive where the device performs a display by an energization between the electrodes, and performs a erasion of the display, wherein the first electrode comprises electrodes, the second electrode comprises a plurality of transparent display electrodes, a pixel is formed where the electrodes are in a grade separated crossing, at least a surface of the electrodes is respectively oxidized, the electrochromic composition layer (50) comprising insulative partition walls (51) and an electrochromic composition (52) including a supporting electrolyte, a polar solvent, and a leuco dye, and wherein the device displays a selected pixel by applying a voltage of a first potential difference, and applies the voltage of a second potential difference so as not to cause any energization. Adsorbents (53) adsorbing the leuco dyes at the time of energizations for the erasions between the first electrode (20) and the second electrode (40) are added to the electrochromic composition (52).