SELF-POWERED AND REVERSIBLE LIGHT-DIRECTED ELECTROPHORETIC DEPOSITION DEVICE FOR USE IN SMART WINDOWS AND PHOTODETECTOR DISPLAYS

• Main Authors: Lee, Elaine, Giera, Brian, Mora, Jeronimo, Dudoff, Jessica Katheryn
• Format: Patent
• Language: English
• Published: 17.10.2019
• Subjects: APPARATUS THEREFOR; CHEMISTRY; DEVICES OR ARRANGEMENTS, THE OPTICAL OPERATION OF WHICH ISMODIFIED BY CHANGING THE OPTICAL PROPERTIES OF THE MEDIUM OF THEDEVICES OR ARRANGEMENTS FOR THE CONTROL OF THE INTENSITY,COLOUR, PHASE, POLARISATION OR DIRECTION OF LIGHT, e.g.SWITCHING, GATING, MODULATING OR DEMODULATING; DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL; ELECTROFORMING; ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; FIXED CONSTRUCTIONS; FIXED OR MOVABLE CLOSURES FOR OPENINGS IN BUILDINGS, VEHICLES,FENCES OR LIKE ENCLOSURES IN GENERAL, e.g. DOORS, WINDOWS,BLINDS, GATES; FREQUENCY-CHANGING; LADDERS; METALLURGY; NON-LINEAR OPTICS; OPTICAL ANALOGUE/DIGITAL CONVERTERS; OPTICAL LOGIC ELEMENTS; OPTICS; PHYSICS; PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTIONOF COATINGS; TECHNIQUES OR PROCEDURES FOR THE OPERATION THEREOF

According to one embodiment, a method includes receiving light on a photoconductive layer of an electrophoretic deposition (EPD) device, the EPD device having a chamber defined by a first sheet, a second sheet and a spacer between the first and second sheets, where the first sheet is nonopaque and includes the photoconductive layer, where the second sheet is nonopaque and spaced from the first sheet, where a fluidic solution having a plurality of particles is in the chamber. The particles in the solution are attracted from suspension to illuminated portions of the photoconductive layer in the absence of an external voltage applied to the first and second sheets. The particles become deposited on the illuminated portions of the photoconductive layer.