Patent application number | Description | Published |
20100225855 | NORMALLY BLACK TRANSFLECTIVE LIQUID CRYSTAL DISPLAYS - Techniques are provided for normally black multi-mode LCDs using homogeneously aligned liquid crystal materials which optical birefringence is electrically controllable. A light recycling/redirecting film may be added between a BLU and a nearby polarization layer to recycle backlight from a reflective part of an LCD unit structure into a transmissive part of the same structure to increase the optical output efficiency of the BLU. Electrodes for the transmissive part and the reflective part may be separately driven in various operating modes. Benefits include high transmittance, high reflectance, wide view angles, improved optical recycling efficiency, and low manufacturing costs. | 09-09-2010 |
20100225857 | BACKLIGHT RECIRCULATION IN TRANSFLECTIVE LIQUID CRYSTAL DISPLAYS - Techniques are provided to recycle light from a backlight unit that is otherwise blocked in a reflective part of a pixel in a transflective LCD. The light is redirected into a transmissive part of the pixel and hence enhances light efficiency and luminance of the pixel. The techniques can be used in a transflective LCD that transmits light in a circularly polarized state, or a linearly polarized state. | 09-09-2010 |
20110025960 | Transflective Display Sub-Pixel Structures - A liquid crystal display comprises a plurality of pixels, each pixel comprising three or more sub-pixels. A first sub-pixel of the three or more sub-pixels comprises a first transmissive part that has a first transmissive area, and a first reflective part having a first reflective area. A second sub-pixel comprises a second transmissive part that has a second transmissive area, and a second reflective part that has a second reflective area. A third sub-pixel comprises a third transmissive part that has a third transmissive area, and a third reflective part that has a third reflective area. At least two among the first transmissive area, the second transmissive area, and the third transmissive area are different in size. The first reflective area, the second reflective area, and the third reflective area are equal in size. | 02-03-2011 |
20110285684 | Low Power Consumption Transflective Liquid Crystal Displays - Techniques are provided to drive a normally white or mixed mode LCD with low voltages and low power consumption. A sub-pixel in the LCD may comprise a reflective part and a transmissive part. The cell gap for a liquid crystal layer in the sub-pixel may provide at least a half-wave phase retardation. A driving voltage range with a maximum voltage at a low value may be used to drive the reflective part and the transmissive part of the sub-pixel to various levels of brightness. | 11-24-2011 |
20120120328 | Transflective Liquid Crystal Displays Using Transverse Electric Field Effect - Techniques are provided for transflective LCDs using homogeneously aligned liquid crystal materials which optical birefringence is electrically controllable. An unpaired retarder may be configured to compensate, in transmissive parts, for the effect of reflection in reflective parts. A light recycling/redirecting film may be added between a BLU and a nearby polarization layer to recycle backlight from a reflective part of an LCD unit structure into a transmissive part of the same structure to increase the optical output efficiency of the BLU. Electrodes for the transmissive part and the reflective part may be separately driven in various operating modes. Benefits include high transmittance, high reflectance, wide view angles, improved optical recycling efficiency, and low manufacturing costs. | 05-17-2012 |
20120120341 | Color Shift Reduction In Transflective Liquid Crystal Displays - Techniques are provided to reduce color shifts in an LCD. A sub-pixel in the LCD may comprise a reflective part and a transmissive part. The reflective and transmissive parts may be covered by one or more retardation films. To reduce color shifts in general and especially in oblique viewing angles, at least one retardation film in the sub-pixel may comprise a slow axis with an elevation angle from a surface of a substrate layer of the LCD. | 05-17-2012 |
20120127140 | MULTI-MODE LIQUID CRYSTAL DISPLAY WITH AUXILIARY NON-DISPLAY COMPONENTS - A liquid crystal display, alone or in combination with any kind of computing device, may comprise a plurality of pixels, each pixel comprising a plurality of sub-pixels, each sub-pixel comprising a transmissive part and a reflective part, wherein a cross sectional area of the reflective part is greater than half of a total cross sectional area of an entire size of that sub-pixel; one or more auxiliary components that are in a non-transmissive part of the sub-pixel and that are configured to provide one or more auxiliary functions that do not affect optical performance of that sub-pixel. In various embodiments the auxiliary components are electronic digital memory logic or drivers; electronic high refresh rate logic or drivers; touch sensor elements, and the display further comprising a touch panel sheet over the pixels; light sensors; photodiodes; photovoltaic solar power generating cells; organic light emitting diodes. | 05-24-2012 |
20120218487 | Patterned In-Cell Retarder For Transflective Vertically Aligned Liquid Crystal Display And Method of Fabrication - In an embodiment, a transflective LCD comprises pixels each comprising a first polarizing layer; a second polarizing layer; a first substrate layer and a second substrate layer opposite the first substrate layer; the first and second substrate layers are between the first polarizing layer and the second polarizing layer; a liquid crystal material between the first and second substrate layers; an over-coating layer adjacent to the first substrate layer; the over-coating layer comprises at least one opening for a transmissive part; a remainder of the over-coating layer forms in part a reflective part; a patterned in-cell retarder adjacent to the first substrate layer; the patterned in-cell retarder covers at least a portion of the reflective part; a reflective layer between the over-coating layer and the second substrate layer; the reflective layer substantially covers the reflective part; the patterned in-cell retarder is between the reflective layer and the first substrate layer. | 08-30-2012 |
20130187962 | Mixed Transmissive-Reflective-Transflective Liquid Crystal Display - A display panel comprises two or more display portions having two or more different types of pixels in two or more different spatial segments of the display panel. The display panel may be coupled to a display driving circuit configured to drive two or more display portions in two or more different spatial segments of the display panel to operate in two or more different display modes. | 07-25-2013 |
Patent application number | Description | Published |
20090107562 | Pre-pressurized self-balanced negative-pressure-free water-supply apparatus - A water supply apparatus with self-balanced inlet pressure without negative pressure is described, which includes a tank, an air pump, a water pump, a micro-processor based automatic control unit, pressure sensors, level sensors, unidirectional valve. Features of this new design include dual cavity storage tank and air activated pressure stabilizer. In the tank a pre-pressed gas is contained. The pressure is maintained using a self-balanced pressure stabilizer. There is no need to add environmental air. Subsequently, environmental air related pollution is avoided. | 04-30-2009 |
20100214527 | LIQUID CRYSTAL OPTICAL SWITCH FOR OPTICAL SIGNAL HAVING ARBITRARY POLARIZATION - An optical device performs both switching and attenuation of an optical beam, where the beam has an arbitrary combination of s-polarized and p-polarized components. The optical device includes a birefringent displacer, a liquid crystal (LC) beam-polarizing structure having six subpixels organized in a first polarization group and a second polarization group, a half-wave plate positioned for polarization control of the second polarization group, and a polarization separating and rotating assembly. The structure of the LC beam-polarizing structure allows for 1×2 switching and attenuation control with a single control signal. The optical device may be configured for processing multiple input light beams, such as the multiple wavelength channels de-multiplexed from a wavelength division multiplexed (WDM) optical signal. | 08-26-2010 |
20100277658 | LIQUID CRYSTAL OPTICAL SWITCH CONFIGURED TO REDUCE POLARIZATION DEPENDENT LOSS - An optical device has the structure to perform switching and attenuation of an optical beam with reduced polarization dependent loss (PDL). The optical device includes a birefringent displacer and two liquid crystal (LC) structures. The first LC structure is used to condition s-polarized components of the optical beam and the second LC structure is used to condition p-polarized components of the optical beam. Each LC structure has a separate control electrode so that the s-polarized components of the optical beam and the p-polarized components of the optical beam can be conditioned differently and in such a manner that reduces PDL. The optical device may be configured for processing multiple input light beams, such as the multiple wavelength channels de-multiplexed from a wavelength division multiplexed (WDM) optical signal. | 11-04-2010 |
20100302469 | LIQUID CRYSTAL OPTICAL DEVICE CONFIGURED TO REDUCE POLARIZATION DEPENDENT LOSS AND POLARIZATION MODE DISPERSION - An LC-based optical device compensates for differences in optical path lengths of polarization components of input beam. As a result, PDL and PMD of the optical device are reduced. The compensation mechanism may be a glass plate that is disposed in an optical path of a polarization component so that the optical path length of that polarization component can be made substantially equal to the optical path length of the other polarization component that traverses through a half-wave plate. Another compensation mechanism is a birefringent displacer that has two sections sandwiching a half-wave plate, wherein the two sections are of different widths and the planar front surface of the birefringent displacer can be positioned to be non-orthogonal with respect to the incident input light beam. | 12-02-2010 |
20110063728 | Delay line interferometers - The specification describes delay line interferometer designs using combinations of basic optical components that are expected to simplify manufacture and reduce costs while still providing precision optical performance. The main operative components of these designs are polarization beam splitters, birefringent crystals, optical delay components, and waveplates. Temperature controllers may be provided for adjusting the delay of the optical delay components. | 03-17-2011 |
20110273758 | ETALON WITH TEMPERATURE-COMPENSATION AND FINE-TUNING ADJUSTMENT - An etalon has an effective cavity length that can be tuned to compensate for temperature-dependent frequency shift and/or for random variations in the manufacturing process. The effective cavity length of an etalon is adjusted by changing the orientation of a tuning plate positioned in the etalon cavity. A screw adjustment and bending beam spring are used to change tuning plate orientation and precisely tune the etalon resonance frequency after the manufacturing process has been completed. Orientation of the tuning plate is adjusted during operation of the etalon using a passive thermal compensation mechanism, such as a bimetal support arm, which is fixed to the tuning plate and configured to reposition the tuning plate with changing temperature. | 11-10-2011 |
20120212694 | Liquid Crystal Optical Device Configured to Reduce Polarization Dependent Loss and Polarization Mode Dispersion - An LC-based optical device compensates for differences in optical path lengths of polarization components of input beam. As a result, PDL and PMD of the optical device are reduced. The compensation mechanism may be a glass plate that is disposed in an optical path of a polarization component so that the optical path length of that polarization component can be made substantially equal to the optical path length of the other polarization component that traverses through a half-wave plate. Another compensation mechanism is a birefringent displacer that has two sections sandwiching a half-wave plate, wherein the two sections are of different widths and the planar front surface of the birefringent displacer can be positioned to be non-orthogonal with respect to the incident input light beam. | 08-23-2012 |
20120257206 | OPTICAL DELAY-LINE INTERFEROMETER FOR DPSK AND DQPSK RECEIVERS FOR FIBER-OPTIC COMMUNICATION SYSTEMS - Some example embodiments of an interferometer for fiber optic communication systems include a pair of identical beam splitting prisms. Each of the beam splitting prisms includes a first total-internal-reflection surface, a second total-internal-reflection surface parallel to the first total-internal-reflection surface, and a beam splitting interface parallel to the first total-internal-reflection surface. An interferometer embodiment may optionally include a thermo-optic compensator disposed between the two beam splitting prisms. A beam splitting plate may optionally be included in some example embodiments to provide four spatially-separated output ports, two from each of two delay line interferometers sharing the two beam-splitting prisms. An alternative embodiment of an interferometer includes a beam splitting prism, a retro-reflective prism, and a beam splitting plate arranged to have four output ports spatially separated from one another, two of each port associated with a different one of two delay line interferometers sharing the beam splitting and retro-reflective prisms. | 10-11-2012 |