Wilmington, MA, United States
Wilmington, MA, United States

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Patent
Pixtronix | Date: 2015-07-02

This disclosure provides devices and methods of reducing stiction during a fluid-filling process. A device can include two substrates with movable MEMS components on at least one of the substrates. The device can include a fluid between the two substrates and surrounding or at least partially surrounding the movable MEMS components, where the fluid can serve as a lubricant for the movable MEMS components. The fluid can be a liquid solution doped with a surface energy modifier, where the surface energy modifier includes a nonpolar functional group R. In some implementations, the nonpolar functional group R can be selected from the group consisting of: alkyl, aryl and naphthenic.


Systems, methods and apparatus, including computer programs encoded on computer storage media, of this disclosure allow for forming an image frame on a display device. In one aspect, a controller associated with a display device can be configured to correct for output white point shift due to variation, across separate color subfields of an image frame, in the respective number of subframes or the respective subframe weights. The controller can determine aggregate subframe weights for at least two color subfields and adjust at least one display parameter based on the determined aggregate subframe weights, to shift the output white point towards a white point of a target color gamut. The display parameter(s) can include a duty cycle of a color subfield, tristimulus coordinates of light used to illuminate a color subfield or gamut mapping function. The controller can display the image frame according to the adjusted display parameter(s).


Patent
Pixtronix | Date: 2015-05-28

Implementations described herein relate to display devices including a metal circuit layer embedded in a dielectric layer configured to provide optical properties. Trenches in the dielectric layer may be etched so that the thickness of the metal circuit layer may extend away from other circuit layers. In some implementations, the metal circuit layer can include thick metal routing lines to send data to pixels of the display device. The thick metal routing lines can provide high conductivity, minimal voltage drop, and signal speed that is sufficiently high to write data to many pixels over long distances. In some implementations, the dielectric layer can be configured to absorb light. Examples of such dielectric layers include carbon-doped spin-on-glass dielectric layers.


Patent
Pixtronix | Date: 2015-06-24

A method of operating a display including loading image data to pixels in multiple rows of pixels in an array of pixels during a data loading phase, actuating the pixels in the multiple rows during an update phase, and illuminating at least one lamp during an lamp illumination phase to illuminate the actuated pixels to form an image on the display, in which each of the loading, actuating and illuminating phases partially overlap in time.


Patent
Pixtronix | Date: 2015-06-26

A latch circuit which can control a drain avalanche effect and improve reliability is provided. The latch circuit includes an input transistor importing a voltage corresponding to 0 or 1 when the scanning voltage is input to a gate, a storage capacitance storing a voltage imported by the input transistor, and having a first electrode and a second electrode, the first electrode is input with a capacitance control signal and the second electrode is connected to a second electrode of the input transistor, a first conduction type first transistor having a gate connected to the second electrode of the input transistor, a second electrode connected to a first output terminal, and a first electrode input with a first latch control signal, and a second conduction type second transistor having a gate connected to the second electrode of the first transistor, a second electrode connected to a second output terminal, and a first electrode input with a second latch control signal.


Patent
Pixtronix | Date: 2015-11-05

A display includes pixels and a controller. The controller can cause the pixels to generate colors corresponding to an image frame. The controller can cause the display to display the image frame using sets of subframe images corresponding to contributing colors according to a field sequential color (FSC) image formation process. The contributing colors include component colors and at least one composite color, which is substantially a combination of at least two component colors. A greater number of subframe images corresponding to a first component color can be displayed relative to a number of subframe images corresponding to another component color. The display can be configured to output a given luminance of a contributing color for a first pixel by generating a first set of pixel states and output the same luminance of the contributing color for a second pixel by generating a second, different set of pixel states.


Patent
Pixtronix | Date: 2015-03-25

This disclosure provides systems, methods and apparatus for providing stacks of optical films that may be used to provide increased on-axis display brightness. In one aspect, an apparatus or system may be provided that includes a light source, a first optical film having triangular cross-section, prismatic light-turning structures, and a second optical film having trapezoidal cross-section, prismatic light-turning structures. The first optical film may be interposed between the light source and the second optical film. In further aspects, a third optical film, similar to the first optical film, may be interposed between the light source and the first optical film. In yet further aspects, one or more additional optical films, similar to the second optical film, may be positioned in the stack such that the second optical film is between the first optical film and the additional optical film(s).


This disclosure provides systems, methods and apparatus for reducing capacitance between interconnects in a display apparatus. In one aspect, a display apparatus can include a plurality of light modulators each having a shutter suspended over a substrate. A first suspended interconnect can electrically couple a first light modulator and a second light modulator. A majority of the length of the first suspended interconnect can be suspended a first height above the substrate. A second suspended interconnect can electrically couple the first light modulator and a third light modulator. A majority of the length of the second suspended interconnect can be above the substrate at a different height than the first suspended interconnect.


Systems and methods for a display having an array of pixels, a substrate, and a control matrix formed on the substrate are described. The array of pixels includes mechanical light modulators that can be referred to as micro-electro-mechanical or MEMS light modulators. The MEMS light modulators may be shutter-based light modulators, and an array of apertures may be formed on the substrate corresponding spatially to the shutters in the array of shutter-based light modulators. Each modulator is configured to be driven from a-light-blocking state to a-light-transmissive state through a movement direction. The array of light modulators are arranged to reduce the correlations in movement directions of neighboring pixels, thereby reducing the amplitude of acoustic emissions from the display.


A direct-view display includes an array of MEMS light modulators and a control matrix formed on a transparent substrate, where each light modulator can be driven into at least two states, and a controller for controlling the states of each light modulator in the array. The control matrix transmits data and actuation voltages to the array. The controller includes an input, a processor, a memory, and an output. The input receives image data encoding an image frame for display. The processor derives a plurality of sub-frame data sets from the image data, where each sub-frame data set indicates desired states of light modulators in multiple rows and multiple columns of the array. The memory stores the plurality of sub-frame data sets. The output outputs the plurality of sub-frame data sets according to an output sequence to drive light modulators into the states indicated in the sub-frame data sets.

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