Display device

• US 20060132404A1
• Filed: 01/12/2004
• Published: 06/22/2006
• Est. Priority Date: 01/27/2003
• Status: Active Grant

• Current Assignee: Amazon Technologies, Inc. (Amazon.com, Inc.)
• Original Assignee: Koninklijke Philips N.V.
• Inventors: Feenstra, Bokke Johannes, Hayes, Robert Andrew, Massard, Romaric Mathieu
• Granted Patent: US 7,359,108 B2
• Time in Patent Office: Days
• US Class Current: 345/84
• CPC Class Codes: G02B 26/005 based on electrowetting

Abstract

Display device based on layer displacement having a perforated white substrate (14) positioned close to a transparent substrate (4). Layer (fluid) displacement such as oil movement results in the (colored) oil film (5) being pumped in a controlled manner above the white substrate. Fluids of three subtractive colors can be independently pumped to separate spaces. Based on the color strength of the used fluids good color rendition can be obtained for a flow channel thickness of less than 25 microns and therefore a total pixel thickness including the sub pixel reservoirs of less than 200 microns.

Claims

1. A display device comprising picture elements (1) having at least one first fluid (5) and a second fluid (6) immiscible with each other within a space between a first transparent support plate (4) and a second support plate (3), the second fluid being electroconductive or polar, the device comprising an intermediate substrate (14) between the first support plate and the second support plate, the intermediate substrate having a reflective surface at the side of the first support plate and being provided with at least one passage (13) between spaces (15, 16) at both sides of the intermediate substrate, the device comprising means (9, 20, 21, 22, 23) for introducing flow of the first fluid through said passage.

2. A display device according to claim 1 in which the device comprises at least one further transparent substrate (24) between the intermediate substrate and the first support plate and with at least one passage (13) between spaces at both sides of the further transparent substrate and spaces (15, 16) between the intermediate substrate and the second support plate.

3. A display device according to claim 1 in which the device comprises two further transparent substrates between the intermediate substrate and the first support plate, defining three spaces and with at least one passage between each of said spaces and spaces between the intermediate substrate and the second support plate.

4. A display device according to claim 1 in which mutually separated spaces at both sides of the further transparent substrate and corresponding mutually spaces between the intermediate substrate and the second support plate comprise first fluids of different colors.