Electrophoretic display device

An electrophoretic display device for generating a colored image has pixels each having a medium ( 12 ) that is substantially transparent in the optical spectral range and at least two types of independently controllable electrophoretic particles ( 31 C, 31 M, 31 Y). The particle species absorb cert...

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Bibliographic Details
Main Author SCHLANGEN LUCAS J. M
Format Patent
LanguageEnglish
Published 04.07.2007
Subjects
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
FREQUENCY-CHANGING
NON-LINEAR OPTICS
OPTICAL ANALOGUE/DIGITAL CONVERTERS
OPTICAL LOGIC ELEMENTS
OPTICS
PHYSICS
TECHNIQUES OR PROCEDURES FOR THE OPERATION THEREOF
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Summary:An electrophoretic display device for generating a colored image has pixels each having a medium ( 12 ) that is substantially transparent in the optical spectral range and at least two types of independently controllable electrophoretic particles ( 31 C, 31 M, 31 Y). The particle species absorb certain wavelengths whereas they are transparent (and basically non-scattering) for light that is absorbed in other particle species. By moving these particles in/out a visible area of the pixel by generating electric fields color absorption can be controlled at will. As the particles are basically transparent (at least for the colors absorbed in the other particle species), the full pixel area (and volume) can be used for any particle species. This way the maximum brightness can be achieved for any color.
Bibliography:Application Number: CN20038004137