Patent ID: 7834844

Claim:
An electronic ink panel comprising: a first substrate having a first electrode; and a second substrate having a plurality of second electrode patterns which faces the first electrode wherein the second electrode patterns cover a pixel region; and an electronic ink layer interposed between the first and the second substrates and including a plurality of particles, each of the particles responding to a voltage in a different level range, wherein the particles comprise a first particle, a second particle and a third particle and the first, the second and the third particles have red, green, and blue colors, respectively, wherein the first particle perform phoresis toward the first electrode when a voltage of a first gamma voltage sets is applied between the first electrode and the second electrode patterns to display the red color of the gradation corresponding to the voltage, wherein the second particle perform phoresis toward the first electrode when a voltage of a second gamma voltage sets larger than the first gamma voltage sets is applied between the first electrode and the second electrode patterns to display the green color of the gradation corresponding to the voltage, wherein the third particle perform phoresis toward the first electrode when a voltage of a third gamma voltage sets larger than the second gamma voltage sets is applied between the first electrode and the second electrode patterns to display the blue color of the gradation corresponding to the voltage, wherein the first gamma voltage sets include a plurality of voltages with a low level range corresponding to the red particles, the second gamma voltage sets include a plurality of voltages with a middle level range corresponding to the green particles and the third gamma voltage sets include a plurality of voltages with a high level range corresponding to the blue particles.