Electrowetting display pixels with pixel walls having non-planar side surfaces
AssigneeAmazon Technologies, Inc.
InventorsSteven Ramos Carneiro, Pavel Novoselov, Sukhdip Sandhu
Life of this patent
Estimating the term…
Abstract
An electrowetting display device includes a first support plate and a second support plate. A first fluid and a second fluid that is immiscible with the first fluid are between the first support plate and the second support plate. A plurality of pixel walls having concave side surfaces are formed on the first support plate to define a plurality of electrowetting pixels. A pixel electrode is disposed on the first support plate for applying a voltage within each electrowetting pixel to cause relative displacement of the first fluid and the second fluid.
Claims22
An electrowetting display device, comprising:
- a first support plate and a second support plate;
- a first fluid and a second fluid that is immiscible with the first fluid, the first fluid and the second fluid between the first support plate and the second support plate;
- a plurality of pixel walls formed on the first support plate, each pixel wall in the plurality of pixel walls having first and second side surfaces, each of the first and second side surfaces of each pixel wall in the plurality of pixel walls being concave and curvilinear, the plurality of pixel walls being associated with a plurality of electrowetting pixels;
- and
- a pixel electrode disposed on the first support plate for applying a voltage within each electrowetting pixel of the plurality of electrowetting pixels to cause relative displacement of the first fluid and the second fluid, wherein at least partly in response to the voltage being applied to the pixel electrode, a portion of the first fluid or the second fluid forms a droplet against the first or second side surface of one of the plurality of pixel walls.
A display device, comprising:
- a first support plate having a top surface;
- and
- a wall on the first support plate, the wall having an end surface and a midpoint between the end surface and the top surface, the wall having a first width at the end surface and a second width less than the first width at the midpoint, a portion of the wall associated with an electrowetting pixel, a first side surface of the portion of the wall facing the electrowetting pixel being at least partially concave, wherein a first fluid disposed within the electrowetting pixel contacts the first side surface.
A method for fabricating at least a portion of an electrowetting display device, the method comprising:
- depositing a photoresist over a surface of a support plate;
- positioning a diffractive mask over the support plate, the diffractive mask including a pattern of non-transparent material configured to disperse light passing through the diffractive mask;
- and
- patterning the photoresist through the diffractive mask to cure a portion of the photoresist into a pixel wall having a concave side surface.
A display device, comprising:
- a first support plate having a first surface;
- and
- a wall on the first surface, the wall having a first width at a top surface of the wall and a second width less than the first width at a point between the top surface and the first surface, a portion of the wall associated with an electrowetting pixel, a first side surface of the portion of the wall facing the electrowetting pixel being at least partially concave, wherein a first fluid disposed within the electrowetting pixel contacts the first side surface.
Dependencies are inferred from the claim text.