Patent ID: 6972815

Claim:
A display device comprising: a display medium layer; and a first electrode and a second electrode, which face each other with the display medium layer interposed between them, wherein the first electrode includes: a first conductive layer; and a first polymer film, which covers the first conductive layer and which makes contact with the display medium layer, wherein the second electrode includes: a second conductive layer; and a second polymer film, which covers the second conductive layer and which makes contact with the display medium layer, wherein the first and second polymer films are alignment films, and the first and second polymer films directly contact the first and second electrodes, respectively; wherein at least a portion of the first conductive layer has a different work function from the second conductive layer, and wherein a variation in potential difference between potential levels of the first and second electrodes right after the device has been exposed to light is about 10% or less of a voltage that is applied to display a grey-scale tone.