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US 8,576,477 B2Granted
Organic light-emitting display device
AssigneeSamsung Display Co., Ltd.
InventorsHye-Jung Park, Soon-Ryong Park, Woo-Suk Jung, Sun-Hwa Kim
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Abstract
An organic light-emitting display device is disclosed. In one embodiment, the device includes a display unit having a plurality of pixels and an electronic ink layer for changing a distribution of charged ink particles and selectively substantially covering the pixels on the display unit. The device provides black visibility while it is powered off using an electronic ink layer operating in the same manner as a shutter so that a reduction of brightness while forming an image may be inhibited.
Claims11
An organic light-emitting display device comprising:
- a display unit comprising a plurality of pixels;
- and
- an electronic ink layer configured to change a distribution of charged ink particles, the charged ink particles selectively substantially covering the pixels of the display unit while the display unit is powered off and the charged ink particles selectively substantially not covering the pixels of the display unit while the display unit is powered on.
An organic light-emitting display device comprising:
- a display unit comprising a plurality of pixels;
- and
- an electronic ink layer configured to change a distribution of charged ink particles and selectively substantially cover the pixels of the display unit,
- wherein the charged ink particles of the electronic ink layer are distributed to substantially cover the pixels while the display unit is powered off and not to cover the pixels while the display unit is powered on,
- wherein the electronic ink layer comprises a main electrode and an auxiliary electrode to apply an electrical force to the charged ink particles in different directions,
- wherein the charged ink particles are configured to collect around the main electrode, based on a voltage applied to the main electrode, when the display unit is powered on,
- wherein the charged ink particles are configured to collect around the auxiliary electrode, based on a momentary voltage applied to the auxiliary electrode, when the display unit is powered off,
- wherein the electronic ink layer comprises a plurality of capsules, and wherein the charged ink particles are disposed in the capsules,
- wherein the charged ink particles are configured to move in a first direction toward the main electrode within the capsules when the display unit is powered on to uncover the pixels and move in a second direction, substantially perpendicular to the first direction, toward the auxiliary electrode within the capsules when the display unit is powered off to substantially cover the pixels, and
- wherein the charged ink particles are distributed in gaps between the pixels when moving in the first direction.
7 more elements
An organic light-emitting display device comprising:
- a display unit comprising a plurality of pixels;
- and
- an electronic ink layer configured to change a distribution of charged ink particles and selectively substantially cover the pixels of the display unit,
- wherein the charged ink particles of the electronic ink layer are distributed to substantially cover the pixels while the display unit is powered off and not to cover the pixels while the display unit is powered on,
- wherein the electronic ink layer comprises a main electrode and an auxiliary electrode to apply an electrical force to the charged ink particles in different directions,
- wherein the charged ink particles are configured to collect around the main electrode, based on a voltage applied to the main electrode, when the display unit is powered on,
- wherein the charged ink particles are configured to collect around the auxiliary electrode based on a momentary voltage applied to the auxiliary electrode, when the display unit is powered off,
- wherein the electronic ink layer comprises a plurality of capsules, and wherein the charged ink particles are disposed in the capsules, and
- wherein the size of one capsule is greater than a size of one pixel.
6 more elements
Dependencies are inferred from the claim text.