Abstract:
An organic light emitting display device includes a substrate having a transmitting region interposed between pixel regions; thin film transistors on a first surface of the substrate; a passivation layer covering the thin film transistors; pixel electrodes on the passivation layer; an opposite electrode disposed to face the pixel electrodes; an organic emission layer between the pixel electrodes and the opposite electrode; a polymer dispersed liquid crystal (PDLC) device disposed such that the thin film transistors are between the PDLC device and the passivation layer, the PDLC device having: a first electrode; a second electrode; and a PDLC layer in which liquid crystal is dispersed in polymer matrix. Distortion of images transmitted through the organic light emitting display device is prevented by restricting scattering of the transmitted light, the transmission of the external light may be adjusted simply, and degradation of the brightness and color coordinate reproduction may be prevented.
Abstract:
An integrated power amplifier can include a carrier amplifier, where the carrier amplifier is connected to a first quarter wave transformer at the input of the carrier amplifier. In addition, the power amplifier can further include at least one peaking amplifier connected in parallel with the carrier amplifier; a first differential combining structure, where the first combining structure includes a first plurality of quarter wave transformers that are configured to combine respective first differential outputs of the carrier amplifier in phase to generate a first single-ended output signal, and a second differential combining structure, where the second combining structures includes a second plurality of quarter wave transformers that are configured to combine respective second differential outputs of the at least one peaking amplifier in phase to generate a second single-ended output signal, where the first single-ended output signal and the second single-ended output signal are combinable in-phase to provide an overall output.
Abstract:
A system for a power transmitter may be provided. The system may include a first amplifier stage having at least a first transistor and a second transistor that are connected in a first cascode configuration; a second amplifier stage having at least a third transistor and a fourth transistor that are connected in a second cascode configuration, where the first transistor receives a system input of the power transmitter, where the second transistor is connected to the third transistor, and where the fourth transistor provides a system output of the power transmitter; and a feedback network that connects a first gate or base of the fourth transistor with a second gate or base of the second transistor.
Abstract:
Embodiments of the invention may provide for power amplifier systems and methods. The systems and methods may include a power amplifier that generates a first differential output signal and a second differential output signal, a primary winding comprised of a plurality of primary segments, where a first end of each primary segment is connected to a first common input port and a second end of each primary segment is connected to a second common input port, where the first common input port is operative to receive the first differential output signal, and where the second common input port is operative to receive the second differential output signal, and a single secondary winding inductively coupled to the plurality of primary segments.
Abstract:
A circuit for sensing an open-circuit lamp is provided. The circuit includes a reference voltage output unit, a voltage sensor, and a comparator. The reference voltage output unit provides a reference voltage. The voltage sensor detects a sensed voltage corresponding to a status of a lamp. The status of the lamp includes an open-circuit status and a closed-circuit status. The comparator compares the sensed voltage with the reference voltage and outputs a result indicating the status of the lamp.
Abstract:
Embodiments of the present invention are directed to heteroarylamine compounds and organic light-emitting devices including the heteroarylamine compounds. The organic light-emitting devices using the heteroarylamine compounds have high-efficiency, low driving voltages, high luminance and long lifespans.
Abstract:
Embodiments of the present invention are directed to heteroarylamine compounds and organic luminescence devices including the heteroarylamine compounds. The organic luminescence devices using the heteroarylamine compounds have high-efficiency, low driving voltages, high luminance and long lifetimes.
Abstract:
Systems and methods are provided for overlapping compact multiple transformers. The systems and methods may include a first transformer section that includes a first primary winding section and a first secondary winding, where the first primary winding section is inductively coupled to the first secondary winding, where the first transformer section is associated with a first rotational current flow direction in the first primary winding section; and a second transformer section that includes a second primary winding section and a second secondary winding, where the second primary winding section is inductively coupled to the second secondary winding, wherein the second transformer section is associated with a second rotational current flow direction in the second primary winding section, where a first portion of the first primary winding section is adjacent to a second portion of the second primary winding section, where the adjacent first and second portions include a substantially same first linear current flow direction.
Abstract:
System and methods are provided for multi-path orthogonal recursive predistortion. The systems and methods may include generating a first orthogonal signal and a second orthogonal signal, where the first and second signals are orthogonal components of an input signal and processing, at a first predistortion module, the first orthogonal signal and a first error correction signal to generate a first predistorted signal. The system and methods may also include processing, at a second predistortion module, the second orthogonal signal and a second error correction signal to generate a second predistorted signal, and providing the generated first and second predistorted signals to a nonlinear device, where the nonlinear device generates an output based upon the first and second predistorted signals, where the first error correction signal is determined based upon an analysis of the output and the first predistorted signal, and where the second error correction signal is determined based upon an analysis of the output and the second predistorted signal.
Abstract:
A multiprocessor system and method thereof are provided. The example multiprocessor system may include first and second processors, a dynamic random access memory having a memory cell array, the memory cell array including a first memory bank coupled to the first processor through a first port, second and fourth memory banks coupled to the second processor through a second port, and a third memory bank shared and connected with the first and second processors through the first and second ports, and a bank address assigning unit for assigning bank addresses to select individually the first and second memory banks, as the same bank address through the first and second ports, so that starting addresses for the first and second memory banks become equal in booting, and assigning bank addresses to select the third memory bank, as different bank addresses through the first and second ports, and assigning, through the second port, bank addresses to select the fourth memory bank, as the same bank address as a bank address to select the third memory bank through the first port.