Patent application number | Description | Published |
20090273577 | Moire-Free Touch Screen with Tilted or Curved ITO Pattern - Touch screens that generate reduced Moiré effects are disclosed. To reduce Moiré effects, the columns (drive or sense lines) of a touch sensor panel can be oriented at an angle with respect to a display device so that the columns are not parallel with the sub-pixel and pixel arrangements of the display device. In some embodiments, the entire touch sensor panel can be oriented at an angle with respect to the display device. In other embodiments, certain lines in the touch sensor panel can be tilted, curved or formed in a zig-zag shape. | 11-05-2009 |
20100060667 | ANGULARLY DEPENDENT DISPLAY OPTIMIZED FOR MULTIPLE VIEWING ANGLES - Methods and apparatus for providing optimized gamma settings for each of a plurality of viewing angles and/or device orientations. In certain types of display devices, off-axis viewing leads to contrast degradation and/or color aberrations in a perceived image, as luminance values depend on the angle at which the output is viewed. By remapping grayscale and/or color values to new output voltages, an image can be presented at an optimized luminance level when viewed from any specific angle. In some embodiments, the display device comprises an inclination sensor adapted to sense device rotation about at least one axis. Display parameter optimization logic reads data from the inclination sensor and automatically adjusts the display to an optimized gamma setting. | 03-11-2010 |
20100165551 | REDUCING OPTICAL EFFECTS IN A DISPLAY - One embodiment may take the form of a system for reducing the appearance of optical effects in a display. The system may include an enclosure with a first surface and a second surface. Furthermore, the system may include spacers that may be deposited on the bottom face of the first surface and/or the top face of the second surface, where the first surface may be a touch panel and/or cover lens and the second surface may be a display module. The spacers may be deposited in one layer with an anti-reflection coating. The thickness of the coating may be less than the diameter of the spacers. | 07-01-2010 |
20100207853 | ELECTRODES FOR USE IN DISPLAYS - A liquid crystal display (LCD) is provided having a discontinuous electrode. In certain embodiments, finger- or slit-like extensions of the discontinuous electrode may be shaped to reduce or eliminate disclinations of liquid crystals within a pixel aperture used to transmit light, where the liquid crystals are oriented in response to an electric field generated using the discontinuous electrode. Similarly, in other embodiments, the different portions of the discontinuous electrode may be lengthened to extend under an opaque mask or may not be linked at one end to reduce or eliminate the disclinations. | 08-19-2010 |
20100207854 | PLACEMENT AND SHAPE OF ELECTRODES FOR USE IN DISPLAYS - A liquid crystal display (LCD) is provided having a discontinuous electrode. In certain embodiments, different portions (such as finger- or slit-like extensions) of the discontinuous electrode may be at different depths relative to one another and/or may be of different widths relative to one another. Similarly, in other embodiments, the different portions of the discontinuous electrode may be spaced apart in a non-uniform manner. | 08-19-2010 |
20100207857 | Undulating Electrodes for Improved Viewing Angle and Color Shift - The present disclosure generally provides for a variety of multi-domain pixel configurations that may be implemented in the unit pixels of an LCD display device, such as a fringe field switching LCD display panel. An LCD display device utilizing one or more of the presently disclosed techniques disclosed herein may exhibit improved display properties, such as viewing angle, color shift, and transmittance properties, relative to those exhibited by conventional multi-domain designs. | 08-19-2010 |
20100207858 | LCD Pixel Design Varying by Color - A liquid crystal display (LCD) having a plurality of pixels is provided. In one embodiment, the pixels of the LCD each include common and pixel electrodes formed on an insulating layer, and a liquid crystal layer responsive to electric fields generated by the electrodes. The plurality of pixels may include two or more sets of pixels each configured to transmit light of a different color, and the pixel electrodes of one set of pixels may be configured differently from those of another set. In other embodiments, the sizes of the pixels may differ. Various additional devices and methods are also provided. | 08-19-2010 |
20100207860 | VIA DESIGN FOR USE IN DISPLAYS - A liquid crystal display (LCD) is provided having transistors disposed within via holes having elongated (e.g., rectangular or oval) contact areas. The use of via holes having elongated contact areas allows an opaque mask defining an aperture for light transmission to be lengthened, thereby increasing the overall area of the aperture. The increase in the area of the aperture may increase the amount of light that can pass through the aperture. | 08-19-2010 |
20100207862 | Pseudo Multi-Domain Design for Improved Viewing Angle and Color Shift - Aspects of the present disclosure relate to single-domain electrode configurations that may be implemented in the unit pixels of a LCD device, such as a fringe field switching (FFS) LCD, to provide a “pseudo-multi-domain” effect, wherein the benefits of both conventional single-domain and multi-domain pixel configuration devices are retained. In accordance with aspects of the present technique, single-domain unit pixels are angled or tilted in differing directions with respect to a vertical axis of the LCD panel (e.g., y-axis) to provide an alternating and/or periodic arrangement of different-angled pixel electrodes along each scanning line, data line, or a combination of both scanning and data lines. In this manner, the transmittance rates of conventional single-domain LCD panels may be retained while providing for improved viewing angle and color shift properties typical of conventional multi-domain LCD panels. | 08-19-2010 |
20100208179 | Pixel Black Mask Design and Formation Technique - A display panel is provided having a first substrate including an electrode configured to generate an electric field and a second substrate including a black mask. The black mask includes an aperture configured to enable light to be transmitted through the aperture, wherein the aperture is at least substantially rectangular and includes corners that are not substantially chamfered. The display panel also includes liquid crystal disposed between the first and second substrates and configured to facilitate passage of light through the display panel in response to the electric field. | 08-19-2010 |
20100244701 | TEMPERATURE BASED WHITE POINT CONTROL IN BACKLIGHTS - Systems, methods, and devices are provided for maintaining a target white point on a light emitting diode based backlight. In one embodiment, the backlight may include two or more strings of light emitting diodes, each driven at a respective driving strength. Each string may include light emitting diodes from a different color bin, and the respective driving strengths may be adjusted, for example, through pulse width modulation or amplitude modulation, to maintain the target white point. In certain embodiments, the driving strengths may be adjusted to compensate for shifts in the white point that may occur due to temperature or aging. A controller may adjust the driving strengths based on feedback from a temperature sensor, from an optical sensor, from a user input, or from calibration data included within the backlight or system. | 09-30-2010 |
20100245224 | LCD ELECTRODE ARRANGEMENT - Systems, devices, and methods for reducing direct current bias and/or enabling a simplified manner of polarity inversion in liquid crystal display (LCD) devices are provided. In accordance with one embodiment, a device may include a processor, a memory device, and a liquid crystal display having a pixel array including rows and columns of pixels. Each pixel of the pixel array may include a pixel electrode separated from a common electrode by a dielectric passivation layer, and may include a transistor to provide a data signal when the transistor is activated. The pixel array is configured such that a neutral amount of direct current bias is generated on the passivation layer when each row of pixels is activated. The common electrodes of certain pixels may be disposed above their respective pixel electrodes, while the common electrodes of certain other pixels may be disposed below their respective pixel electrodes. | 09-30-2010 |
20100245227 | WHITE POINT CONTROL IN BACKLIGHTS - Systems, methods, and devices are provided for maintaining a target white point on a light emitting diode based backlight. In one embodiment, the backlight may include two or more strings of light emitting diodes, each driven at a respective driving strength. Each string may include light emitting diodes from a different color bin, and the respective driving strengths may be adjusted, for example, through pulse width modulation or amplitude modulation, to maintain the target white point. In certain embodiments, the driving strengths may be adjusted to compensate for shifts in the white point that may occur due to temperature or aging. A controller may adjust the driving strengths based on feedback from a temperature sensor, from an optical sensor, from a user input, or from calibration data included within the backlight or system. | 09-30-2010 |
20100245228 | AGING BASED WHITE POINT CONTROL IN BACKLIGHTS - Systems, methods, and devices are provided for maintaining a target white point on a light emitting diode based backlight. In one embodiment, the backlight may include two or more strings of light emitting diodes, each driven at a respective driving strength. Each string may include light emitting diodes from a different color bin, and the respective driving strengths may be adjusted, for example, through pulse width modulation or amplitude modulation, to maintain the target white point. In certain embodiments, the driving strengths may be adjusted to compensate for shifts in the white point that may occur due to temperature or aging. A controller may adjust the driving strengths based on feedback from a temperature sensor, from an optical sensor, from a user input, or from calibration data included within the backlight or system. | 09-30-2010 |
20100245723 | LCD PANEL HAVING IMPROVED RESPONSE - A liquid crystal display (LCD) having a liquid crystal layer is provided. In one embodiment, the liquid crystal layer includes a nematic liquid crystal material having liquid crystal molecules in an untwisted state. A chiral dopant is dispersed within the liquid crystal layer and configured to bias the liquid crystal molecules toward a twisted state. Furthermore, a polymer network is disposed among the liquid crystal molecules and configured to bias the liquid crystal molecules toward the untwisted state. Various additional devices and methods are also provided. | 09-30-2010 |
20110298833 | HIGH CONTRAST LIQUID CRYSTAL DISPLAY - Devices and methods related to high-contrast liquid crystal displays (LCDs) are provided. For example, such an electronic device may include an LCD with two liquid crystal alignment layers not symmetric to one another and upper and lower polarizing layers respectively above and below the alignment layers. Light transmittance through the plurality of pixels may increase monotonically with gray scale voltage. The display may operate using a gray scale level | 12-08-2011 |
20120113154 | COLUMN INVERSION TECHNIQUES FOR IMPROVED TRANSMITTANCE - Present techniques involve methods and systems of inversion patterns for pixels in a display. Inversion techniques involve driving image signals having a first polarity to data lines of a pixel matrix during a first time period and driving image signals having an opposite polarity to the data lines during a second time period. In some embodiments, the pixels may be configured to have electrodes having only two finger electrodes, thus widening the distance between electrodes and decreasing the susceptibility for crosstalk between pixels. In some embodiments, horizontal cross-talk of electromagnetic fields between pixels may be further reduced by configuring the data line driving scheme such that voltage polarity is flipped for the pixels along every two, three, or more data line columns. Furthermore, a Z inversion pattern may be employed to reduce the occurrence of undesirable display artifacts. | 05-10-2012 |
20120162156 | SYSTEM AND METHOD TO IMPROVE IMAGE EDGE DISCOLORATION - Present techniques involve methods and systems for reducing edge discoloration in a display. In one embodiment, the first and last columns of a display are dimmed by adjusting a black mask or reducing transmittance of the relevant pixels. Further, the first and last columns of a display may be entirely covered by the black mask. In some embodiments, using a coupling extrusion on a neighboring sub-pixel can be used to control the coupling between the neighboring sub-pixels to reduce edge discoloration. Display software may also be used to reduce edge discoloration. For example, software may automatically reduce the brightness of the first and last column. In some embodiments, software may be used to detect edges of objects within the display area. Edges of an object are detected, and the last sub-pixel of the background and/or the first sub-pixel of the object are compensated. | 06-28-2012 |
20120287378 | CONTROLLING REFLECTION IN LCD DEVICES - Systems and methods are provided for controlling the light reflected from a display panel. In one embodiment, a prism mirror and a diffuse reflector are positioned between the bottom polarizer and the liquid crystal layer of a pixel to control the polarization of reflected light transmitted through the display panel. The diffuse reflector diffuses light towards the prism mirror, and the prism mirror affects the polarization of the light. When the pixel is on, the liquid crystals of the liquid crystal layer may shift the polarization of the reflected light such that it can be transmitted through the top polarizer. When the pixel is off, the liquid crystals may not substantially shift the polarization of the reflected light, and the reflected light may be polarized to be absorbed by the top polarizer. Accordingly, reflected light is substantially transmitted through the pixel when the pixel is on, and substantially absorbed by the top polarizer when the pixel is off | 11-15-2012 |
20120287605 | DISPLAY WITH COLOR CONTROL - Techniques are provided for controlling the colors of reflected light out of a display surface in a display device, such that display discoloration (e.g., green tinting) may be reduced, particularly when the display is operating in bright ambient environments. In one embodiment, a display device may include a color filter black mask layer having an arrangement of red, green, and blue color filter areas, where the red and/or blue color filter areas are substantially greater than the green color filter area. In some embodiments, the display device may include red and blue color filter pigment resin areas which may be disposed over the reflective areas to increase the overall amount of red and blue light that will be generated by reflected light to result in a total light reflection that is substantially neutral in color. | 11-15-2012 |
20120306771 | TOUCH PANEL DISPLAY WITH IMPROVED PATTERN VISIBILITY - Systems and methods are directed to reducing surface reflections on an electronic display device having a touch-screen panel. A touch-screen panel may contribute to undesirable reflection of external light. For example, a touch-screen panel typically includes conductive electrodes which may significantly reflect ambient light, resulting in decreased visibility of displayed images. In some embodiments, a circular polarizer is disposed over a touch-screen panel in the display device. The circular polarizer includes a linear polarizer and a quarter-wave plate to modify the polarization of the external light traveling towards and reflecting from the touch-screen panel and absorbing the reflected light from the touch-screen panel to significantly reduce undesirable light reflections from the touch-screen panel. | 12-06-2012 |
20120307364 | Reducing Optical Effects in a Display - One embodiment may take the form of a system for reducing the appearance of optical effects in a display. The system may include an enclosure with a first surface and a second surface. Furthermore, the system may include spacers that may be deposited on the bottom face of the first surface and/or the top face of the second surface, where the first surface may be a touch panel and/or cover lens and the second surface may be a display module. The spacers may be deposited in one layer with an anti-reflection coating. The thickness of the coating may be less than the diameter of the spacers. | 12-06-2012 |
20120313881 | DISPLAY SCREEN SHIELD LINE SYSTEM - Electrical shield line systems are provided for openings in common electrodes near data lines of display and touch screens. Some displays, including touch screens, can include multiple common electrodes (Vcom) that can have openings between individual Vcoms. Some display screens can have an open slit between two adjacent edges of Vcom. Openings in Vcom can allow an electric field to extend from a data line through the Vcom layer. A shield can be disposed over the Vcom opening to help reduce or eliminate an electric field from affecting a pixel material, such as liquid crystal. The shield can be connected to a potential such that electric field is generated substantially between the shield and the data line to reduce or eliminate electric fields reaching the liquid crystal. | 12-13-2012 |
20130021567 | UNDULATING ELECTRODES FOR IMPROVED VIEWING ANGLE AND COLOR SHIFT - The present disclosure generally provides for a variety of multi-domain pixel configurations that may be implemented in the unit pixels of an LCD display device, such as a fringe field switching LCD display panel. An LCD display device utilizing one or more of the presently disclosed techniques disclosed herein may exhibit improved display properties, such as viewing angle, color shift, and transmittance properties, relative to those exhibited by conventional multi-domain designs. | 01-24-2013 |
20130044120 | THERMAL COLOR SHIFT REDUCTION IN LCDS - Systems, methods, and devices are provided for an electronic display with thermally compensated pixels. Such an electronic display may have an array of pixels, at least some of which may be thermally compensated pixels that exhibit reduced color shift over a 20° C. change in temperature. These thermally compensated pixels may have numbers of pixel electrode fingers, pixel electrode widths and spacings, cell gap depths, and/or pixel edge distances that cause the array of pixels to exhibit a reduced color shift than otherwise (e.g., a color shift of less than delta u′v′ of about 0.0092 from a starting white point) when the temperature of the electronic display changes from about 30° C. to about 50° C. | 02-21-2013 |
20130063684 | DUAL PURPOSE TOUCH SENSOR PANEL AND OPTICAL RETARDER - When a user operates a touch sensor panel having an LCD device outdoors or in a bright environment, light reflecting off the device can create glare. In order to reduce glare, a user can view the device through polarized filters such as polarized sunglasses. | 03-14-2013 |
20130076600 | DATA LINE-TO-PIXEL DECOUPLING - Embodiments of the present disclosure relate to display devices and electronic devices incorporating a data line distribution segment between neighboring pixel electrodes. Specifically, embodiments of the present disclosure employ a uniformly distributed data line distribution segment coupled to a data line so as to cause a substantially uniform data line-to-pixel electrode capacitance with the neighboring pixel electrodes even when the data line is disposed closer to one of the neighboring pixel electrodes than the other. | 03-28-2013 |
20130120283 | TOUCH SENSOR PANEL HAVING AN INDEX MATCHING PASSIVATION LAYER - Touch sensor panels typically include a plurality of layers that can be stacked on top of each other. When the touch sensor panel is used in a bright environment, incident light can hit the interfaces between those layers of the stackup having mismatched refractive indices and can reflect off those interfaces. The light reflected from those interfaces can give rise to the appearance of fringes on the touch sensor panel, which can be visually distracting. In order to reduce the appearance of these fringes, embodiments of the disclosure are directed to the addition of an index matching passivation layer between a conductive layer of traces and an adhesive layer in the touch sensor panel stackup. | 05-16-2013 |
20130241900 | SYSTEMS AND METHODS FOR ADJUSTING LIQUID CRYSTAL DISPLAY WHITE POINT USING COLUMN INVERSION - Systems, methods, and devices for adjusting a white point of a liquid crystal display (LCD) using column inversion are provided. In one example, a method includes measuring white points of an electronic display that occur when the display employs different column inversion schemes. The display may be programmed to perform the column inversion scheme that produces a white point closest to a desired white point. | 09-19-2013 |
20130241901 | SYSTEMS AND METHODS FOR LIQUID CRYSTAL DISPLAY COLUMN INVERSION USING 2-COLUMN DEMULTIPLEXERS - Systems, methods, and devices for performing column inversion using 2-column demultiplexers are provided. In one example, an electronic display may include a display panel with columns of pixels configured to be programmed with frames of image data and display driver circuitry. The display driver circuitry may include three demultiplexers, each respectively coupled to one pixel column of a first superpixel and one pixel column of a second superpixel. Each of the three demultiplexers may receive amplified image data of a single polarity per frame. | 09-19-2013 |
20130241958 | SYSTEMS AND METHODS FOR LIQUID CRYSTAL DISPLAY COLUMN INVERSION USING 3-COLUMN DEMULTIPLEXERS - Systems, methods, and devices for column inversion are provided. In one example, an electronic display may include a display panel having columns of pixels and display driver circuitry. The display driver circuitry may include source amplifiers and demultiplexers. Each demultiplexer may channel data output by at least one source amplifier to one of three columns of pixels. The display driver circuitry may drive the display panel according to a 3-column inversion scheme using one source amplifier per demultiplexer per frame of image data. | 09-19-2013 |
20130241959 | SYSTEMS AND METHODS FOR REDUCING LOSS OF TRANSMITTANCE DUE TO COLUMN INVERSION - Systems, methods, and devices for reducing the loss of transmittance caused by column inversion. To provide one example, an electronic display may include a display panel with columns of pixels and driver circuitry to drive the pixels using column inversion. Adjacent columns that are driven at like polarity are spaced more closely than adjacent columns driven at opposite polarities. | 09-19-2013 |
20130241960 | SYSTEMS AND METHODS FOR LIQUID CRYSTAL DISPLAY COLUMN INVERSION USING REORDERED IMAGE DATA - Systems, methods, and devices for performing column inversion using reordered image data are provided. In one example, an electronic display may include a display panel with columns of pixels and driver circuitry to drive the pixels using column inversion. The driver circuitry may drive pixels of a first superpixel in a first color order and drive pixels of an adjacent second superpixel in a second color order, such that more pixels are driven sequentially at a common polarity than would have been driven sequentially at the common polarity were the pixels of the first superpixel driven at the same color order as the pixels of the second superpixel. | 09-19-2013 |
20130329171 | DEVICES AND METHODS FOR SHIELDING DISPLAYS FROM ELECTROSTATIC DISCHARGE - Methods and devices for shielding displays from electrostatic discharge (ESD) are provided. In one example, a display of an electronic device may include a high resistivity shielding layer configured to protect electrical components from static charges. The display may also include a conductive layer electrically coupled to the high resistivity shielding layer and configured to decrease a discharge time of static charges from the high resistivity shielding layer. The display may include a grounding layer and a conductor electrically coupled between the conductive layer and the grounding layer to direct static charges from the conductive layer to the grounding layer. | 12-12-2013 |