Method for making electrowetting display device
AssigneeAmazon Technologies, Inc.
InventorsPaul Vermeulen, Bruce Scott, Mick Evans, Ivar Schram
Life of this patent
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Abstract
The present invention relates to a method of making an electrowetting display device having a plurality of picture elements, each picture element being defined by walls surrounding a display region, the plurality of picture elements covering a first area of a support plate. The method comprises the steps of: applying a hydrophobic layer covering at least the first area; lowering the hydrophobicity of the hydrophobic layer over a second area substantially outside the display regions; forming the walls on the hydrophobic layer over the first area. The present invention further relates to an electrowetting display device.
Claims27
A method of making an electrowetting display device having a plurality of picture elements, each picture element being defined by walls surrounding a display region, the plurality of picture elements covering a first area of a support plate, the method comprising:
- applying a hydrophobic layer covering at least the first area;
- lowering a hydrophobicity of the hydrophobic layer over a second area substantially outside the display regions;
- and
- forming the walls on the hydrophobic layer over the first area.
An electrowetting display device having a plurality of picture elements, each picture element being defined by walls surrounding a display region, the electrowetting display device including a support plate covered by a hydrophobic layer having a hydrophobicity, the walls being part of a patterned wall layer arranged on the hydrophobic layer, where the hydrophobicity in an area of the hydrophobic layer adjoining the wall layer varies between a high and a low value.
An electrowetting display device having a plurality of picture elements, each picture element being defined by walls surrounding a display region, the electrowetting display device including a support plate covered by a hydrophobic layer having a hydrophobicity, the walls being part of a patterned wall layer arranged on the hydrophobic layer, wherein the display region includes an initiation area, the hydrophobicity having a high value in an area of the display region outside the initiation area and a low value in the initiation area and in an area between the display regions.
A method of making an electrowetting display device having a plurality of picture elements, each picture element being defined by walls surrounding a display region, the plurality of picture elements covering a first area of a support plate, the method comprising:
- applying a hydrophobic layer covering at least the first area;
- lowering a hydrophobicity of the hydrophobic layer over a second area substantially outside the display regions without lowering the hydrophobicity of the hydrophobic layer in at least part of the display regions;
- and
- forming the walls at least partly on the second area.
Dependencies are inferred from the claim text.