| KENT DISPLAYS INCORPORATED Patent applications |
| Patent application number | Title | Published |
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| 20130070184 | LIQUID CRYSTAL PAPER - Disclosed is liquid crystal paper and an erasing device that is not permanently connected to the liquid crystal paper. A sheet of liquid crystal paper includes flexible polymeric substrates. A polymer network or a spacer network, in which bistable cholesteric reflective liquid crystal material is dispersed, is disposed between two of the substrates. Optional alignment layers or optional electrically conductive layers sandwich the liquid crystal material therebetween. An optional layer of light absorbing material is disposed near one of the substrates. Application of pressure to an upper substrate changes a focal conic nonreflective texture of the liquid crystal material to a reflective planar texture. The erasing device applies a voltage or heat for erasing the paper by changing the reflective planar texture to the focal conic nonreflective texture. | 03-21-2013 |
| 20120273725 | Tetraoxybiphenyl Ester Chiral Dopants for Cholesteric Liquid Crystal Displays - A liquid crystal composition comprising a chiral dopant compound represented by the following formula: | 11-01-2012 |
| 20120127136 | DISPLAY DEVICE INCLUDING PIEZOELECTRIC AND LIQUID CRYSTAL LAYERS - A display device includes a piezoelectric layer. First electrically conductive electrodes are disposed on both sides of the piezoelectric layer. A bistable liquid crystal layer is disposed adjacent the piezoelectric layer. Second electrically conductive electrodes are disposed on both sides of the liquid crystal layer. The liquid crystal layer can be addressed by electrically addressing the piezoelectric layer causing the piezoelectric layer to move into contact with the liquid crystal layer, changing the brightness of pixels of the liquid crystal layer. | 05-24-2012 |
| 20120099030 | CHOLESTERIC LIQUID CRYSTAL WRITING TABLET WITH SPACER CONTROLLED SENSITIVITY - A cholesteric liquid crystal writing tablet includes a first substrate that is transparent and flexible on which a writing pressure is applied and a second substrate spaced apart from the first substrate. One electrically conductive layer is in contact with the first substrate and is transparent and another of the electrically conductive layers is in contact with the second substrate. The electrically conductive layers are separated from each other by a cell gap. Cholesteric liquid crystal material is disposed between the electrically conductive layers. Spacers are disposed in the liquid crystal material that control the cell gap. The spacers have a size and concentration in the liquid crystal material that restricts flow of the liquid crystal material when the cell gap is reduced upon application of the writing pressure. | 04-26-2012 |
| 20120086735 | ELECTRONIC SKIN HAVING UNIFORM GRAY SCALE REFLECTIVITY - The invention features electronic skin including an active layer formed of bistable cholesteric liquid crystal material and articles comprising the skin, the electronic skin having uniform gray scale reflectivity. Also featured is method for producing suitable reduction pulses that will provide a display (e.g., the electronic skin) with uniform gray scale reflectivity. Reduction pulses of narrow width are used to create uniform levels of gray in the electronic skin to overcome display imperfections that cause discontinuity in the gray scale reflectivity. | 04-12-2012 |
| 20110128265 | VIDEO RATE ChLCD DRIVING WITH ACTIVE MATRIX BACKPLANES - A device and method providing a pixel architecture that, in at least one embodiment, contains both an on/off memory element and a switching element to utilize low-power liquid crystal displays for video or near-video applications. Such an embodiment can be implemented, for example, using a pair of TFTs for implementing the memory element and switching element on a common substrate. Other embodiments can utilize actual memory devices for the memory elements. This device and method are particularly useful for driving cholestric display elements for video or near video rate applications. | 06-02-2011 |
| 20110061670 | COLOR CHANGING ARTIFICIAL FINGERNAILS - Electronic color changing artificial nails comprise a polymer layer in a general shape of a human natural nail, bistable electro-optic material and a ledge on which display electrodes are disposed located at a tip of the artificial nail. Once the artificial nail is attached to the natural nail, the artificial nail can be updated by simply plugging the tip into a separate electronic color changing device which is used to set the color of the nail to whatever the user desires. | 03-17-2011 |
| 20100265214 | WRITING TABLET INFORMATION RECORDING DEVICE - A writing/drawing tablet utilizing a data capture device such as a pressure sensitive display that can capture data from the resulting image drawn on the device. In general, Bistable Liquid Crystal Displays (BLCD), and in particular, Cholesteric Liquid Crystal Displays (ChLCDs), can be utilized in such a device to create low cost pressure sensitive displays that are efficient power consumers and that can be utilized in a number of unique devices. | 10-21-2010 |
| 20100245221 | DISPLAY WITH OVERLAYED ELECTRONIC SKIN - This disclosure features an electronic display with overlayed electronic skin. The display includes an outer transparent display surface and can be placed in a dark state or in a bright state. The skin overlays the outer display surface and includes an electro-optic layer. Transparent electrically conductive layers are disposed on each side of the electro-optic layer. Electronic circuitry applies voltages to the electrically conductive layers enabling the electro-optic material of the electronic skin to be placed into a substantially transparent state and a reflective state. Images or colors can be displayed on the electronic skin while portions of the electronic skin are in the reflective state and light passing through the electronic skin is absorbed by the display in the dark state. When the display is in the bright state images or colors can be displayed on the display that can be seen through the electronic skin. | 09-30-2010 |
| 20100157180 | LIQUID CRYSTAL DISPLAY - A flexible liquid crystal display is provided wherein an addressable liquid crystal layer is disposed on a single flexible substrate so that the display itself will exhibit flexibility. The substrate is preferably a flexible non-transparent material and more preferably a drapable material such as fabric. | 06-24-2010 |
| 20100059273 | ELECTROOPTICAL DISPLAY WITH ELECTRICAL CROSSOVER - Electrooptical displays require conductors on both sides of the liquid crystal thin film. The two conductors face opposite sides of the display. The cost of electrically connecting to these displays can be decreased by having the conductors of the display all face the same side of the display. This invention includes a technique to allow both conductors to face the same side of the display. | 03-11-2010 |
| 20090096942 | Selectively erasable electronic writing tablet - An electronic writing tablet is composed of one or more layers on which an image is formed and can be selectively erased. One aspect of the invention is a bistable cholesteric writing tablet on which an image is formed while applying writing pressure. The image can be fully erased and new images written on the tablet. In addition, one can selectively erase any or all portions of the written image to restore the original background color. Another aspect of the invention is a multi-color stacked writing tablet in which a color of an image is selected (usually by applying a suitable voltage) while applying writing pressure using an instrument such as an untethered stylus on the surface of the tablet. The writing tablet includes at least two or three stacked layers of bistable cholesteric liquid crystal material. Selected colors can be additively mixed to achieve intermediate colors as desired. The image can be fully erased and new images written on the tablet. In addition, one can selectively erase any or all portions of the written image to restore the original background color. | 04-16-2009 |
| 20090033811 | Multiple color writing tablet - One aspect of the invention is a bistable cholesteric writing tablet on which an image is formed by applying a suitable voltage while applying writing pressure, which results in a focal conic texture in a reduced gap region of the active layer while not changing the texture of the unreduced gap region of the active layer (e.g., a written portion being in a focal conic texture on a background in the planar texture). Another aspect of the invention is a multi-color stacked writing tablet in which a color of an image is selected by applying a suitable voltage while applying writing pressure using an instrument such as an untethered stylus on the surface of the tablet. The writing tablet includes at least two or three stacked layers of bistable cholesteric liquid crystal material. Selected colors can be additively mixed to achieve intermediate colors as desired. The image can be erased and new images written on the tablet. Gray scale achieved by varying the applied voltage during writing or the writing pressure in some cases, enables the writing tablet to produce a broad range of colors. The writing device is suitable for many applications such as a toy, sketch pad, erasable signage, tags or a large writing board without the mess of chalk or ink. | 02-05-2009 |
