Patent application number | Description | Published |
20080218471 | ELECTROPHORETIC DISPLAY WITH THERMAL CONTROL - An electrophoretic display (EPD) with thermal control is disclosed for controlling and maintaining an image in extreme temperature environments. Techniques are also disclosed for maintaining the EPD cell threshold voltage for EPD cells comprising an EPD display media at or above a desired level in an environment in which the EPD may be subjected to an extreme temperature. The techniques comprise sensing a sensed temperature associated with the EPD display media, determining whether the sensed temperature satisfies a criterion established to ensure that the display media temperature remains at a level associated with an acceptable EPD cell threshold voltage, and in the event it is determined that the sensed temperature does not satisfy the criterion, controlling the EPD display media temperature as required to bring the sensed temperature to a level that satisfies the criterion. | 09-11-2008 |
20090096745 | APPROACH TO ADJUST DRIVING WAVEFORMS FOR A DISPLAY DEVICE - The present invention is directed to methods for adjusting or selecting driving waveforms in order to achieve a consistent optical performance of a display device. When a method of the present invention is applied, even if there are changes in the display medium due to temperature variation, photo-exposure or aging, the optical performance can be maintained at a desired level. | 04-16-2009 |
20090213452 | COLOR DISPLAY DEVICES - The present invention is directed to color display devices. The color display devices comprise display cells which is capable of displaying multiple color states. The display device may also comprise black matrix layers or a brightness enhancement structure on the viewing side. The present invention is directed to a display device comprising a plurality of display cells, wherein each of said display cells is sandwiched between a first layer comprising a common electrode and a second layer comprising a plurality of driving electrodes and at least one of the driving electrodes is a designated electrode, and said display device further comprises blocking layers on its viewing side and said blocking layers are located in positions corresponding to the designated electrodes. | 08-27-2009 |
20090251763 | COLOR DISPLAY DEVICES - The present invention is directed to color display devices which are capable of displaying multiple color states. The display device comprises a plurality of display cells, wherein each of said display cells is (a) sandwiched between a first layer comprising a common electrode and a second layer comprising a plurality of driving electrodes, wherein at least one of the driving electrodes is a designated electrode, (b) filled with an electrophoretic fluid comprising at least two types of pigment particles dispersed in a solvent or solvent mixture, and (c) capable of displaying at least four color states. The display device may also comprise hiding layers or a brightness enhancement structure on the viewing side. | 10-08-2009 |
20090273827 | COLOR DISPLAY DEVICES - The present invention is directed to color display devices in which each display cell is capable of displaying three color states. The display fluid filled in the display cells comprises two types of pigment particles. The color display device may further comprise a brightness enhancement structure on its viewing side. | 11-05-2009 |
20100053728 | COLOR DISPLAY DEVICES - The color display of the present invention involves a two particle system and is capable of displaying multiple colors with high quality black and white states. The color states are suitable for highlighting function. The color display does not require alignment between the electrodes and the display cells in which a display fluid is filled, which significantly reduces the complexity of the design and also lowers the manufacturing costs. | 03-04-2010 |
20100103501 | ELECTROPHORETIC DISPLAY STRUCTURES - This invention relates to a display device comprising a plurality of display cells, wherein said display cells are separated by slanted partition walls. This invention also relates to a display device comprising a plurality of display cells, wherein said display cells are separated by indented partition walls having indented areas. The electrophoretic structures of the present invention may be manufactured by a continuous or semi-continuous roll-to-roll manufacturing process. The structures in which display cells are separated by slanted partition walls or partition walls having indented areas are capable of providing enhanced color states. | 04-29-2010 |
20100134538 | DRIVING METHODS FOR ELECTROPHORETIC DISPLAYS - This application is directed to driving methods for electrophoretic displays. The driving methods comprise grey level waveforms which greatly enhance the pictorial quality of images displayed. The driving method comprises: (a) applying waveform to drive each pixel from its initial color state to the full first color then to a color state of a desired level; or (b) applying waveform to drive each pixel from its initial color state to the full second color then to a color state of a desired level. | 06-03-2010 |
20100165005 | HIGHLIGHT COLOR DISPLAY ARCHITECTURE USING ENHANCED DARK STATE - The present invention is directed to a highlight color display. One of the key features of the invention is the dark color of the display fluid filled in the microcups, which allows the dark state to appear black. There is no alignment required between the pixel electrodes and the microcups. In practice, a standard active matrix array may be used to drive the display device. | 07-01-2010 |
20100165448 | MULTICOLOR DISPLAY ARCHITECTURE USING ENHANCED DARK STATE - The present invention is directed to an alternative design of a multicolor display. The display device is capable of achieving high quality black and white states. The pixel electrodes and the microcups in the display device may be aligned only in one axis. In practice, a standard active matrix array may be used to drive the display device. | 07-01-2010 |
20100225999 | LUMINANCE ENHANCEMENT STRUCTURE FOR REFLECTIVE DISPLAY DEVICES - The present invention is directed to luminance enhancement structures for reflective display devices. The structure comprises columns and grooves, wherein each of said grooves has a cross-section comprising an apex angle and two edge lines. The structure increases the overall reflectance by reducing the total internal reflection, and as a result, the brightness of a display device is increased. | 09-09-2010 |
20100271407 | REFLECTIVE DISPLAY DEVICES WITH LUMINANCE ENHANCEMENT FILM - The present invention is directed to reflective display devices with a luminance enhancement structure on its viewing side and at least an auxiliary layer and/or edge sealing. The structure increases the overall reflectance by reducing the total internal reflection, and as a result, the brightness of a display device is increased. | 10-28-2010 |
20100295880 | DRIVING METHODS FOR ELECTROPHORETIC DISPLAYS - This application is directed to driving methods for electrophoretic displays. The driving methods comprise grey level waveforms which greatly enhance the pictorial quality of images displayed. The driving method comprises: (a) applying waveform to drive each pixel to the full first color then to a color state of a desired level; or (b) applying waveform to drive each pixel to the full second color then to a color state of a desired level. | 11-25-2010 |
20110043543 | COLOR TUNING FOR ELECTROPHORETIC DISPLAY - The present invention is directed to a color tuning composition and a method for adjusting the color temperature of an electrophoretic display. A display device comprising a color tuning layer of the present invention has several advantages. For example, the colors of the images displayed may be modified according to different needs without affecting the performance of the display device; the level of whiteness may be improved; and in some cases, the need for a UV barrier layer may also be eliminated. | 02-24-2011 |
20110043894 | DISPLAY DEVICES HAVING MICRO-REFLECTORS AND COLOR FILTERS - The present invention relates to a process for manufacturing a brightness enhancement structure comprising micro-reflectors. The process comprises forming an array of micro-structures by embossing; and depositing a metal layer over the surface of the micro-structures. The present invention also relates to a process for manufacturing a display device comprising micro-reflectors. The present invention further relates to a display device comprising micro-reflectors and color filters. | 02-24-2011 |
20110080362 | ELECTRONIC INFORMATION DISPLAYS - The present invention offers an electronic information display which can be updated at a very low cost. This is accomplished by an electronic display device and a separate writer device. The writer device may comprise an electronic backplane, a mechanical fixture which can be easily be pressed against the electronic information display, and a wireless network and computational infrastructure which connect the writer device to a data base. | 04-07-2011 |
20110096104 | SPATIALLY COMBINED WAVEFORMS FOR ELECTROPHORETIC DISPLAYS - The present invention is directed to a driving method for compensating the response speed change of an electrophoretic display due to temperature variation, photo-degradation or aging of the display device, without a complex structure (e.g., use of sensors). This is accomplished by combining two waveforms, one of which causes the grey level to become dimmer and the other waveform causes the grey level to become brighter, as the response speed degrades. | 04-28-2011 |
20110217639 | ELECTROPHORETIC DISPLAY FLUID - The present invention is directed to an electrophoretic fluid which comprises a non-mobile or semi-mobile phase and charged pigment particles. The fluid has many advantages, such as increased contrast without affecting the switching speed. | 09-08-2011 |
20110261433 | ELECTROPHORETIC DISPLAY WITH ENHANCED CONTRAST - The present invention is directed to an electrophoretic display with enhanced contrast. The invention is directed to an electrophoretic display comprising: a first layer comprising a common electrode, a second layer comprising at least one collecting pixel electrode, a plurality of display cells which are sandwiched between the first layer and the second layer and are filled with an electrophoretic fluid comprising charged pigment particles dispersed in a solvent or solvent mixture; and a background layer. More specifically, the invention provides an electrophoretic display having the dark color state darker while maintaining the same intensity of the lighter color state. | 10-27-2011 |
20110273363 | COMPOSITE DISPLAY MODULES - The present invention provides composite display modules which have reduced visible dead space between display modules. This is of particular interest for the price rail, where it is desirable to achieve a long (about 3-4 ft) section of an active module. The present invention is directed to a composite display module comprising: (a) more than one single display module, wherein said single display modules are not edge-sealed and they are mounted on a single back support structure and are kept tightly close to each other right up to their edges; and (b) said composite display module is edge sealed. | 11-10-2011 |
20120134010 | ELECTROPHORETIC DISPLAY FLUID - This invention relates to an electrophoretic display fluid comprising a non-mobile or semi-mobile phase and two types of charged pigment particles dispersed in a solvent or solvent mixture, and an electrophoretic display device utilizing such an electrophoretic display fluid. The electrophoretic fluid of the present invention provides improved image qualities. | 05-31-2012 |
20130057463 | COLOR DISPLAY DEVICES - The present invention is directed to a color display comprising an electrophoretic fluid comprising two types of pigment particles of contrasting colors and carrying opposite charge polarities dispersed in a clear and colorless solvent, wherein said electrophoretic fluid is sandwiched between a common electrode and a plurality of colored sub-pixel electrodes or colored pixel electrodes. | 03-07-2013 |
20130176612 | COLOR DISPLAY DEVICES - The present invention is directed to color display devices which are capable of displaying multiple color states. The display device comprises a plurality of display cells, wherein each of said display cells is (a) sandwiched between a first layer comprising a common electrode and a second layer comprising a plurality of driving electrodes, wherein at least one of the driving electrodes is a designated electrode, (b) filled with an electrophoretic fluid comprising at least two types of pigment particles dispersed in a solvent or solvent mixture, and (c) capable of displaying at least four color states. The display device may also comprise hiding layers or a brightness enhancement structure on the viewing side. | 07-11-2013 |
20130208338 | SHUTTER MODE FOR COLOR DISPLAY DEVICES - The present invention is directed to a color display comprising an electrophoretic fluid which comprises one or two types of pigment particles dispersed in a clear and colorless or clear and colored solvent, wherein said electrophoretic fluid is sandwiched between a common electrode and a plurality of driving electrodes. The driving electrodes are kept at a certain distance in order to expose a background layer. | 08-15-2013 |
20130250400 | ELECTROPHORETIC DISPERSION - The present invention is directed to an electrophoretic dispersion, in particular, an electrophoretic dispersion comprising uncharged or lightly charged additive particles for improving bistability of an electrophoretic display. The average diameter of the additive particles is about 1% to about 25% of the average hydrodynamic diameter of the charged pigment particles. | 09-26-2013 |
20140055840 | COLOR TUNING FOR ELECTROPHORETIC DISPLAY DEVICE - The present invention is directed to color tuning methods for electrophoretic display devices. For example, a color tuning agent may be added to a composition for forming a display cell structure or a primer layer. Alternatively, a separate color tuning layer may be added to a display device. Further, a color tuning agent may be added to an electrophoretic display fluid. The color tuning methods are useful for adjusting the color temperature of a display device. | 02-27-2014 |
20140078036 | COLOR DISPLAY DEVICES - The present invention is directed to a color display comprising an electrophoretic fluid comprising two types of pigment particles of contrasting colors and carrying opposite charge polarities dispersed in a clear and colorless solvent, wherein said electrophoretic fluid is sandwiched between a common electrode and a plurality of colored sub-pixel electrodes or colored pixel electrodes. | 03-20-2014 |
20140078576 | ELECTROPHORETIC DISPLAY DEVICE - The present invention is directed to an electrophoretic display device comprising a plurality of display cells, wherein said display cells are filled with an electrophoretic fluid comprising: a) charged pigment particles of a first color; and b) a solid porous matrix of a second color, in which the charged pigment particles dispersed in a solvent. The electrophoretic fluid has many advantages, such as increased contrast without affecting the switching speed. | 03-20-2014 |
20140300651 | DRIVING BISTABLE DISPLAYS - The invention relates to waveforms, circuits and methods for driving bistable displays. The invention is directed to a method, comprising in combination: applying, across a bistable display device, a shaking signal comprising a plurality of positive and negative pulses each driven for a first time to disperse partially packed particles; applying, across the device, one or more first driving signals to first pixels of the device for second times that are sufficient to drive the first pixels to one or more reference states; and concurrently with the first driving signals, applying, across the device, one or more second driving signals to second pixels of the device for third times that are shorter than necessary to drive the second pixels to any of the one or more reference states. | 10-09-2014 |
20140340737 | COLOR ELECTROPHORETIC DISPLAY - The present invention is directed to a color display device wherein each of the display cells is filled with an electrophoretic fluid comprising two types of charged pigment particles dispersed in a colored medium. Multiple colors of high quality may be achieved by the present invention. | 11-20-2014 |