LED pixel structures and methods that improve brightness uniformity by reducing current nonuniformities in a light-emitting diode of the pixel structures are disclosed.

Active matrix light emitting diode pixel structure and concomitant method

Introductory Fourier transform spectroscopy

IEEE International Solid-State Circuits Conference

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شیوع عوارض حاد تزریق خون در بیماران بستری در 11 بیمارستان تهران و مازندران

A display panel is formed using essentially single crystal thin-film material that is transferred to substrates for display fabrication. Pixel arrays form light valves or switches that can be fabricated with control electronics in the thin-film material prior to transfer. The resulting circuit panel is than incorporated into a display panel with a light emitting or liquid crystal material to provide the desired display.

Single crystal silicon arrayed devices for display panels

Reducing partial shading power loss with an integrated Smart Bypass

Orientation estimation can be executed by comparing the output of a 3D accelerometer and a 3D magnetometer with respectively gravity and local magnetic field vectors. For this purpose, an unscented Kalman filter was designed and tested. However, accelerometers also measure motion other than gravity, resulting in an error when estimating orientation directly from their output signals. Therefore, extra filters are added and the input parameters of the Kalman filter are dynamically varied, in order to reduce the effect of motion. Simulations are performed to tune the filter parameters for minimal motion influence without hampering actual orientation tracking. Satisfactory orientation tracking is performed with the filter using actual sensor nodes.

3D orientation tracking based on unscented Kalman filtering of accelerometer and magnetometer data

paper presents a novel technique for passive matrix addressing of electrophoretic displays. The addressing scheme is successfully applied in a working demonstrator with 5x7 pixels. To our knowledge, this is the first time a working electrophoretic display with passive matrix addressing is presented.

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Passive matrix addressing of electrophoretic image display

A versatile architecture for monolithic low-power high-voltage flat-panel display drivers is presented. A prototype of such a driver chip was designed and fabricated in the 100-V 0.7-/spl mu/m CMOS intelligent interface technology (I/sup 2/T) of Alcatel MicroElectronics. It features 100-V output driving capability, while the operation of the entire driver chip is controlled by means of 3- to 5-V digital signals. Special high-voltage level-shifter circuits, based on the dynamic charge control concept, were developed to reduce the internal power consumption of the driver chip to extremely low values of 1 to 2 /spl mu/W per driver output. A powerful on-chip control unit supports numerous display addressing schemes and very complex multilevel output waveforms can be synthesized. These attractive electrical characteristics, together with the pronounced flexibility and multifunctionality, make this driver architecture ideally suited for a variety of flat-panel displays, especially in battery-powered applications.

A versatile micropower high-voltage flat-panel display driver in a 100-V 0.7-/spl mu/m CMOS intelligent interface technology

An original CMOS level-shifter architecture with high-voltage driving capability and extremely low power consumption is presented. Simulations indicate that an adequate dynamic control of the charge on the gate electrodes of the high-voltage output transistors allows reliable level-shifter operation, even at very low data refresh rates, without the continuous power dissipation found in conventional CMOS level-shifter architectures. Therefore, the CMOS level-shifters presented in this paper are perfectly suited for the monolithic integration of high-voltage display driver circuits in battery-powered applications.

Jan Doutreloigne

Papers

Reducing partial shading power loss with an integrated Smart Bypass

3D orientation tracking based on unscented Kalman filtering of accelerometer and magnetometer data

Passive matrix addressing of electrophoretic image display

A versatile micropower high-voltage flat-panel display driver in a 100-V 0.7-/spl mu/m CMOS intelligent interface technology

Low-power high-voltage CMOS level-shifters for liquid crystal display drivers