Qualcomm Mems Technologies, Inc.

Idc, LLC

Mithran C Mathew

Clarence Chui

Marc Mignard

Jeffrey Brian Sampsell

Karen Tyger

Manish Kothari

A method for sensing the actuation and/or release voltages of a electromechanical system or a microelectromechanical device include applying a varying voltage to the device and sensing its state and different voltage levels. In one embodiment, the device is part of a system comprising an array of interferometric modulators suitable for a display. The method can be used to compensate for temperature dependent changes in display pixel characteristics.

System and method of sensing actuation and release voltages of an interferometric modulator

A system and method for processing image data to be displayed on a display device, where the display device requires more power to be driven to display image data comprising particular spatial frequencies in one dimension than to be driven to display image data comprising the particular spatial frequencies in a second dimension. The method includes receiving image data and filtering the received image data such that the image data at particular spatial frequencies in a first dimension are attenuated more than the image data at particular spatial frequencies in a second dimension.

System and method for power reduction when decompressing video streams for interferometric modulator displays

A displaying apparatus that includes a plurality of electromechanical system elements arranged in rows. The electromechanical system elements of each of the rows are further arranged in subrows. The subrows of each row are electrically connected. Certain of the electromechanical system elements have a hysteresis stability window that is nested with another hysteresis stability window of certain others of the electromechanical system elements. A method of manufacturing a displaying apparatus that includes forming a plurality of electromechanical system elements arranged in rows. The electromechanical system elements of each of the rows are further arranged in subrows. The subrows of each row are electrically connected. Certain of the electromechanical system elements have a hysteresis stability window that is nested with another hysteresis stability window of certain others of the electromechanical system elements.

MEMS display

Embodiments of exemplary MEMS interferometric modulators are arranged at intersections of rows and columns of electrodes. In certain embodiments, the column electrode has a lower electrical resistance than the row electrode. A driving circuit applies a potential difference of a first polarity across electrodes during a first phase and then quickly transition to applying a bias voltage having a polarity opposite to the first polarity during a second phase. In certain embodiments, an absolute value of the difference between the voltages applied to the row electrode is less than an absolute value of the difference between the voltages applied to the column electrode during the first and second phases.

Drive method for MEMS devices

Methods and systems are disclosed for providing video data and display signals. In one embodiment, a system is configured to display video data on an array of bi-stable display elements, where the system includes a processor, a display comprising an array of bi-stable display elements, a driver controller connected to the processor and configured to receive video data from the processor, and an array driver configured to receive video data from the driver controller and display signals from the processor, and to display the video data on the array of bi-stable display elements using the display signals. In another embodiment, a method of displaying data on a bi-stable display includes transmitting display signals from a processor to a driver of an array of bi-stable display elements, and updating an image displayed on the array of bi-stable display elements, wherein the updating is based on signals from the driver and performed on a periodic basis that is based at least in part upon the transmitted display signals.

Method and system for driving a bi-stable display

The invention comprises systems and methods for controller and driver features for displays, and in particular, controller and driver features that relate to displays with bi-stable display elements. In one embodiment, such a display includes at least one driving circuit and an array comprising a plurality of bi-stable display elements, where the array is configured to be driven by the driving circuit, and where the driving circuit is programmed to receive video data and provide a subset of the received video data to the array based on a frame skip count. In some embodiments, the frame skip count is programmable or dynamically determined. In another embodiment, a method of displaying data on an array having a plurality of bi-stable display elements comprises receiving video data comprising a plurality of frames, displaying selected frames based upon a frame skip count, measuring the change between each selected frame and a frame previous to the selected frame, and displaying non-selected frames if the measured change is greater than or equal to a threshold.

Controller and driver features for bi-stable display

The invention comprises systems and methods for partitioning displays, and in particular, displays of interferometric modulator displays. In one embodiment, a display system includes one driving circuit configured to provide signals based on video data intended for display, and a bi-stable display comprising an array having a plurality of bi-stable display elements. The array is configured to display video data using signals received from the driving circuit, and the driving circuit is configured to partition the array into two or more fields, each field including at least one bi-stable display element, and refresh each of the two or more fields in accordance with a refresh rate associated with each field. In another embodiment, a method of displaying data on a display of a client device includes partitioning a bi-stable display of the client device into two or more fields, displaying video data in the two or more fields, and refreshing each of the two or more fields in accordance with a refresh rate that is associated with each field.

A method for sensing the actuation and/or release voltages of a microelectromechanical device include applying a varying voltage to the device and sensing its state and different voltage levels. In one embodiment, the device is part of a system comprising an array of interferometric modulators suitable for a display. The method can be used to compensate for temperature dependent changes in display pixel characteristics.

A display comprising: a plurality of MEMS elements arranged in rows, wherein the MEMS elements of each of the rows are further arranged in subrows and wherein the subrows of each row are electrically connected; and wherein the physical property of at least one MEMS element in at least one subrow is different from the physical property of at least one MEMS element in other subrows. The physical property can be a spring constant associated with a movable mirror, a film thickness, an electrode width, a damping force caused by air between a movable mirror and a fixed mirror, a mass of a movable mirror, a material or geometry of the respective MEMS element.

Systems and methods of controlling client display modes are disclosed. In one embodiment, an electronic device includes an array of interferometric modulators, and an array driver for the array of interferometric modulators. The array driver is configured to receive video data which at least a portion of is in an interlaced format, to identify a portion of the video data as interlaced format, and to render the identified video data in an interlaced format on the array of interferometric modulators. In another embodiment, a method of displaying information on a bi-stable display includes receiving video data at a device having an interlaced mode of displaying data and a non-interlaced mode of displaying data, identifying at least a portion of the video data as interlaced format, and displaying the interlaced video data on the bi-stable display. In some embodiments the bi-stable display can be an array of interferometric modulators.

System with server based control of client device display features

A system and method for addressing an array of MEMS display elements, such as interferometric modulators, from a drive control. A display includes groups of display elements that are addressed with a commonly applied drive signal. In one embodiment, the groups of display elements are configured to have different response times and are driven by pulses of varying length indicative of those response times. In another embodiment, the groups of display elements are configured to have different actuation voltages and are driven by pulses of varying voltage indicative of those actuation voltages.

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Mountain View, CA, United States of America

Mithran C Mathew