Abstract: A display device (30) comprises a reflective display (38) arranged to render a first image viewable through a viewing surface and a projection means (31-37) arranged to render a second image viewable in reflection on the viewing surface, the reflective display (38) and the projection means (31-37) being mounted on a common frame.

Abstract: A system for rendering color images on an electro-optic display when the electro-optic display has a color gamut with a limited palette of primary colors, and/or the gamut is poorly structured (i.e., not a spheroid or obloid). The system uses an iterative process to identify the best color for a given pixel from a palette that is modified to diffuse the color error over the entire electro-optic display. The system additionally accounts for variations in color that are caused by cross-talk between nearby pixels.

Abstract: A writeable display medium incorporating various sensing elements into the backplane of the writeable display medium so that the sensing elements can cause the associated pixels to update immediately in contrast to state-of-the art writeable displays that rely on a feedback loop between a digitizing layer and a display driver that controls the output of a display. As a stylus is moved over the display, a signal emitted from the stylus (e.g., an electromagnetic field) will change the state of a transistor associated with a pixel, resulting in a nearly instantaneous state change in the display (i.e., white to black).

Abstract: A writeable display medium incorporating light-sensitive semiconductors into the thin film transistors (TFTs), and incorporating a long-pass optical filter to provide a narrow window of wavelengths that can be used to cause the TFTs to switch states when suitably biased. As a light-emitting stylus is moved over the display, the light will change the state of the TFTs, resulting in a nearly instantaneous state change in the display (i.e., white to black). Accordingly, writeable display media of the invention do not suffer from the writing latency that is experienced with many writeable tablet systems.

Abstract: An electro-optic display comprising at least two separate layers of electro-optic material, with one of these layers being capable of displaying at least one optical state which cannot be displayed by the other layer. The display is driven by a single set of electrodes between which both layers are sandwiched, the two layers being controllable at least partially independently of one another. Another form of the invention uses three different types of particles within a single electrophoretic layer, with the three types of particles being arranged to shutter independently of one another.

Abstract: Particle-based electro-optic displays are described that are both electrically and magnetically controllable. Global and local addressing may be provided. The global addressing may be providing by one or more electrodes of the display, and may be electrically activated. The local addressing may be provided by a writing implement, especially one capable of producing rotating electric fields.

Abstract: An electro-optic display comprising at least two separate layers of electro-optic material, with one of these layers being capable of displaying at least one optical state which cannot be displayed by the other layer. The display is driven by a single set of electrodes between which both layers are sandwiched, the two layers being controllable at least partially independently of one another. Another form of the invention uses three different types of particles within a single electrophoretic layer, with the three types of particles being arranged to shutter independently of one another.

Abstract: A writing implement is described that dispenses a liquid colorant and produces a magnetic field. The magnetic field may be directed to an electronically driven display having a particle that is responsive to a magnetic field, such as an electrophoretic display, thereby changing an optical state of the display.

Abstract: An electrophoretic medium includes a fluid, a first, light scattering particle (typically white) and second, third and fourth particles having three subtractive primary colors (typically magenta, cyan and yellow); at least two of these colored particles being non-light scattering. The first and second particles bear polymer coatings such that the electric field required to separate an aggregate formed by the third and the fourth particles is greater than that required to separate an aggregate formed from any other two types of particles. Methods for driving the medium to produce white, black, magenta, cyan, yellow, red, green and blue colors are also described.

Abstract: The present invention relates to a thermally-responsive film that may, for example, be affixed to an exterior surface of a building to help control its temperature as it is exposed to the sun. The thermally-responsive film has a continuous phase and a discontinuous phase. The discontinuous phase comprises a plurality of droplets, each of which comprises the light-absorbing suspending fluid and the light-reflecting particles. The light-reflecting particles are dispersed in a vehicle that is either a second fluid that is immiscible with the suspending fluid and has a higher volumetric coefficient of thermal expansion than the suspending fluid, or a combination of materials that together have a higher volumetric coefficient of thermal expansion than the suspending fluid that together with the light-reflecting particles form composite particles.

Abstract: Electro-optic, especially electrophoretic, displays are used in variety of architectural and furniture applications, including a tile (100) comprising an electro-optic layer (110) capable of changing the color of the file, front and multiple rear electrodes and a light-transmissive polymeric layer (102), the exposed surface of which is textured to provide a plurality of facets inclined to the plane of the tile (100), the rear electrodes being aligned with the facets. A variable color writable board is also provided.

Abstract: Particle-based electro-optic displays are described that are both electrically and magnetically controllable. Global and local addressing may be provided. The global addressing may be providing by one or more electrodes of the display, and may be electrically activated. The local addressing may be provided by a writing implement, especially one capable of producing rotating electric fields.

Abstract: A writing implement is described that dispenses a liquid colorant and produces a magnetic field. The magnetic field may be directed to an electronically driven display having a particle that is responsive to a magnetic field, such as an electrophoretic display, thereby changing an optical state of the display.

Abstract: An electro-optic display comprising at least two separate layers of electro-optic material, with one of these layers being capable of displaying at least one optical state which cannot be displayed by the other layer. The display is driven by a single set of electrodes between which both layers are sandwiched, the two layers being controllable at least partially independently of one another. Another form of the invention uses three different types of particles within a single electrophoretic layer, with the three types of particles being arranged to shutter independently of one another.

Abstract: An electro-optic display comprising at least two separate layers of electro-optic material, with one of these layers being capable of displaying at least one optical state which cannot be displayed by the other layer. The display is driven by a single set of electrodes between which both layers are sandwiched, the two layers being controllable at least partially independently of one another. Another form of the invention uses three different types of particles within a single electrophoretic layer, with the three types of particles being arranged to shutter independently of one another.

Abstract: An electro-optic display comprising at least two separate layers of electro-optic material, with one of these layers being capable of displaying at least one optical state which cannot be displayed by the other layer. The display is driven by a single set of electrodes between which both layers are sandwiched, the two layers being controllable at least partially independently of one another. Another form of the invention uses three different types of particles within a single electrophoretic layer, with the three types of particles being arranged to shutter independently of one another.

Abstract: An electro-optic display comprising at least two separate layers of electro-optic material, with one of these layers being capable of displaying at least one optical state which cannot be displayed by the other layer. The display is driven by a single set of electrodes between which both layers are sandwiched, the two layers being controllable at least partially independently of one another. Another form of the invention uses three different types of particles within a single electrophoretic layer, with the three types of particles being arranged to shutter independently of one another.

Abstract: A display device (30) comprises a reflective display (38) arranged to render a first image viewable through a viewing surface and a projection means (31-37) arranged to render a second image viewable in reflection on the viewing surface, the reflective display (38) and the projection means (31-37) being mounted on a common frame.

Abstract: An electro-optic display comprising at least two separate layers of electro-optic material, with one of these layers being capable of displaying at least one optical state which cannot be displayed by the other layer. The display is driven by a single set of electrodes between which both layers are sandwiched, the two layers being controllable at least partially independently of one another. Another form of the invention uses three different types of particles within a single electrophoretic layer, with the three types of particles being arranged to shutter independently of one another.