Abstract:
Methods of fabricating a microelectromechanical systems (MEMS) device with reduced masking and MEMS devices formed by the same are disclosed. In one embodiment, a MEMS device (900) is fabricated by laminating a front substrate (910) and a carrier (950), each of which has components preformed thereon. The front substrate (910) is provided with stationary electrodes formed thereover. A carrier (950) including movable electrodes (1360) formed thereover is attached to the front substrate (910). The carrier (3500) of some embodiments is released after transferring the movable electrodes (3510) to the front substrate (3570). In other embodiments, the carrier (3450) stays over the front substrate (3410), and serves as a backplate for the MEMS device (3400). Features are formed by deposition and patterning, by embossing, or by patterning and etching. In some embodiments in which the MEMS device (5200) serves as an interferometric modulator, the front substrate (5010) is also provided with black masks (5220) to prevent or mitigate bright areas in the actuated state of the MEMS device. Static interferometric modulators (5400) can also be formed by shaping or preformation and lamination. The methods not only reduce the manufacturing costs, but also provide a higher yield. The resulting MEMS devices can trap smaller volumes between laminated substrates and are less susceptible to pressure variations and moisture leakage.
Abstract:
Various embodiments of the invention relate to methods and systems for thermal compensation of a MEMS device. In certain embodiments, an interferometric modulator includes a first electrode and a flexible second electrode situated on a substrate. The flexible second electrode is a movable layer that can comprise aluminum or an aluminum-containing material, while the substrate can comprise glass. When the interferometric modulator undergoes a temperature change, the difference in thermal expansion rates results in a decrease in the tensile strain on the movable layer. Embodiments of the present invention provide a film configured to compensate for the thermal expansion. The film has a thermal expansion coefficient less than the substrate so as to compensate for expansion of the movable layer with respect to the substrate when the MEMS is exposed to thermal energy. The film compensates for mismatch in thermal expansion between the materials of the substrate and movable layer so as to inhibit undesirable optical characteristics.
Abstract:
A method of presenting multiple frames on a touch screen is disclosed. In a particular embodiment, the method includes detecting multiple touch locations on a touch screen of an electronic device for at least an activation time. The method also includes splitting a display area of the touch screen into a first frame and a second frame based on the multiple touch locations.
Abstract:
A display device includes an array of display elements, (Do) each display element configurable into one of a plurality of states upon application of one of a plurality of voltages, and an array of voltage shifters, (510) each voltage shifter associated with one or more of the display elements and configured to receive at least one input voltage from a display driver circuit and output at least one output voltage different than the input voltage to the associated one or more display elements. The voltage shifters can include, for example, at least one of an amplifier, a differential amplifier, an operational amplifier, a charge pump, a level shifter and a digital - to - analog converter.
Abstract:
Various embodiments of the invention relate to methods and systems for generating the color white in displays created from interferometric modulators and more specifically, to the generation of the color white through the use of reflected light at two wavelengths. In one embodiment, a display device displays the color white. The color white is generated by reflecting light from two pluralities of interferometric modulator types. The first modulator type reflects colored light at a specific wavelength. The second modulator type reflects colored light selected to be at a wavelength complementary to the first. The combined light reflected from the two types appears white in the display.
Abstract:
A method of presenting multiple frames on a touch screen is disclosed. In a particular embodiment, the method includes detecting multiple touch locations on a touch screen of an electronic device for at least an activation time. The method also includes splitting a display area of the touch screen into a first frame and a second frame based on the multiple touch locations.
Abstract:
This disclosure provides methods, systems and apparatus for storing and processing image data at the pixel using augmented active matrix pixels. Some implementations of a display device may include a substrate, an array of display elements associated with the substrate and configured to display an image, an array of processor units associated with the substrate, wherein each processor unit is configured to process image data for a respective portion of the display elements and an array of memory units associated with the array of processor units, wherein each memory unit is configured to store data for a respective portion of the display elements. Some implementations may enable color processing image data at the pixel, layering of image data at the pixel or temporal modulation of image data at the pixel. Further, in some implementations, the display element may be an interferometric modulator (IMOD). Some other implementations may additionally include a display, a processor configured to communicate with the display and a memory device that is configured to communicate with the processor.
Abstract:
This disclosure provides systems, methods and apparatus for parallel dithering images are disclosed. In one aspect, a display device (40) includes: a front substrate (110); a backplate (120) opposing the front substrate (110); an array of display elements (D 11 -D 33 ) associated with the front substrate (110); and an array of processing units (PU 11 -PU 33 ) associated with the backplate (120). Each of the processing units (PUn-PU 33 ) is configured to process data for one or more of the display elements (D 11 -D 33 ) for dithering an image. Each of the processing units (PU 11 -PU 33 ) is spatially arranged to correspond to the one or more display elements (D 11 -D 33 ) for which it is configured to process data. The array of processing units (PU 11 -PU 33 ) can perform a faster dithering process than a single processor sequentially performing all computation for dithering. Further, the position of the array of processing units (PU 11 -PU 33 ) allows effective image data processing in an active-matrix type display device while utilizing the space of the backplate thereof.
Abstract:
A method of fabricating an electromechanical device which comprises a step of etching a sacrificial layer with an etchant comprising a noble gas fluoride, e.g. xenon difluoride (XeF2). The efficiency of the etching process may be increased in various ways, and the cost of an etching process may be decreased. Unused etchant may be isolated and recirculated during the etching process. Etching byproducts may be collected and removed from the etching system during the etching process. Components of the etchant may be isolated and used to general additional etchant. Either or both of the etchant or the layers being etched may also be optimized for a particular etching process.
Abstract:
Disclosed is a microelectromechanical system (MEMS) device and method of manufacturing the same. In one aspect, MEMS such as an interferometric modulator include one or more elongated interior posts and support rails supporting a deformable reflective layer, where the elongated interior posts are entirely within an interferometric cavity and aligned parallel with the support rails. In another aspect, the interferometric modulator includes one or more elongated etch release holes formed in the deformable reflective layer and aligned parallel with channels formed in the deformable reflective layer defining parallel strips of the deformable reflective layer.