41 results about "Threshold shift" patented technology

A system and method for driving an AMOLED display is provided. The AMOLED display includes a plurality of pixel circuits. A voltage-programming scheme, a current-programming scheme or a combination thereof is applied to drive the display. Threshold shift information, and/or voltage necessary to obtain hybrid driving circuit may be acquired. A data sampling may be implemented to acquire a current/voltage relationship. A feedback operation may be implemented to correct the brightness of the pixel.

An active noise control system for use in testing hearing using a pure tone audiometry testing procedure and employing multiple switching controllers with pre-filtering means and a switch to select any one controller to provide a predetermined one and having the ability to configure each switching controller so that the maximum threshold shift occurs for the frequency of the test tone and for modifying each test tone in accordance with a standard calibration frequency.

The invention provides a pixel circuit, an array substrate and a display device. The pixel circuit comprises a first transistor, a second transistor, a third transistor, a fourth transistor, a fifth transistor, a sixth transistor, a driving transistor, a first capacitor and a second capacitor. By means of cooperation of the transistors and the capacitors, drive current which is generated by the driving transistor and used for driving a light emitting element to emit light is unrelated to intrinsic threshold voltage of the driving transistor, threshold shift caused by techniques is compensated, the problem of nonuniformity in light emission of the display device is solved, and uniformity in light emission of the display device is improved; in addition, the threshold voltage of the driving transistor is compensated by means of source following, and accordingly hysteresis is avoided.

Based on the results of detection of characteristics of drive transistors and organic EL elements, a control circuit finds magnitudes of threshold shifts of the drive transistors and the organic EL elements. A power supply voltage control unit sets a value of a low-level power supply voltage to a value lower, by a voltage value corresponding to an average value of the magnitudes of the threshold shifts for all pixels, than a value at an initial point in time. Furthermore, the power supply voltage control unit adjusts a value of a high-level power supply voltage, depending on magnitudes of mobilities obtained by detection of characteristics of the drive transistors.

A dynamic thresholding level set method combines two optimization processes, i.e., a level set segmentation and an optimal threshold calculation in a local histogram, into one process that involves a structure called a “propagating shell.” The propagating shell is a mobile 3-dimensional shell structure with a thickness that encompasses the boundary of an object, the boundary between two objects or the boundary between an object and a background. Because the local optimal threshold tends to shift to a value of a small region in a histogram, the shift can drive the propagating shell to an object boundary by pushing or pulling the propagating shell. The segmentation process is an optimizing process to find a balanced histogram with minimal threshold shift. When the histogram in the propagating shell is balanced, the optimal threshold becomes stable, and the propagating shell reaches a convergence location, i.e., an object boundary. This method can be applied to computer-aided organ and tumor volumetrics.

A gas detection system is provided for identifying a gas. The gas detection system includes a sensing module with a hollow chamber enclosed by a chamber housing. Additionally, the sensing module includes an optical sensing fiber positioned within the hollow chamber. The optical sensing fiber includes a gas sensor including a fiber Bragg grating positioned at a grating location along the optical sensing fiber, and a sensing layer affixed to an exterior surface of the optical sensing fiber at the grating location. After the gas is directed into the hollow chamber, the sensing layer and the gas exchange heat energy, based in part on a heat transfer coefficient of the gas. The exchange of the heat energy induces a shift in a Bragg resonant wavelength of the fiber Bragg grating which exceeds a threshold shift required for detection, where the shift is used to identify the gas.

The invention relates to an organic light-emitting display and a driving method. The organic light-emitting display comprises a plurality of scanning lines, a plurality of data lines and a power line, wherein the scanning lines and the data lines are crosswise arranged and define a plurality of pixel units. Each of the pixel units comprises a driving MOS (Metal Oxide Semiconductor) tube, a first switch MOS tube, a storage capacitor, an organic light-emitting diode and a threshold compensating circuit, wherein the threshold compensating circuit is used for compensating the threshold shift of the driving MOS tube so that current flowing through the driving MOS tube is not influenced by the threshold shift of the driving MOS tube. The light-emitting quality of the organic light-emitting display is improved, and the organic light-emitting display does not use an external compensating circuit for compensating thresholds, thereby the design complexity of peripheral driving circuits is also correspondingly simplified, and the developing and manufacturing cost is reduced.

The invention belongs to the technical field of display, and relates to a shifting register, a driving method thereof, a gate on array and a display device. The shifting register comprises an input circuit module, a pull-up circuit module, a reset circuit module and a noise reduction circuit module, wherein the input circuit module is connected with an input signal end and a pull-up node, and is used for pulling up a pull-up node signal under the control of an input signal; the pull-up circuit module is connected with a clock signal end, an output signal end and the pull-up node, and is used for outputting a shifting signal and pulling up the pull-up node signal for the second time; the reset circuit module is connected with a reset signal end, the pull-up node, the output signal end and alow-voltage signal end, and is used for lowering the output signal end and the pull-up node; the noise reduction circuit module is connected with a modulating voltage signal end, the low-voltage signal end, the output signal end and the pull-up node, and is used for continuously lowering the output signal end and the pull-up node. Through the adoption of the shifting register disclosed by the invention, threshold shift of a thin-film transistor can be effectively avoided, and a noise reduction effect is better.

The invention discloses a pixel circuit and a display device. The pixel circuit comprises a first transistor, a second transistor, a third transistor, a fourth transistor, a fifth transistor, a sixthtransistor, a drive transistor, a first capacitor and a second capacitor. Due to match between the transistors and the capacitors, a threshold voltage of the drive transistor is compensated in a source following manner, so that drive current which is generated by the drive transistor and is used for driving a luminous element to give light is irrelevant to the threshold voltage of the drive transistor, the threshold shift defect caused by the process is further compensated, the problem that the display device is non-uniform in light emission is solved, and the light emission uniformity of thedisplay device is improved. In addition, due to match among the various transistors, the drive transistor and the anode of the luminous element are reset, the phenomenon that threshold voltage grab isinconsistent during while switching high and low gray scales can be avoided, and the problem that the brightness of a first frame is insufficient after ghost and gray-scale jump is further solved.

Provided is a shift register circuit capable of preventing occurrence of malfunction caused by a threshold shift of a thin-film transistor due to an influence of external light. A unit circuit constituting each stage of the shift register circuit includes a plurality of thin-film transistors. The plurality of thin-film transistors are categorized into a first group (T2, T4, T9) whose on-off state is controlled at relatively high on-duty and a second group (T1, T3, T5, T6, T7, T8) whose on-off state is controlled at relatively low on-duty. In such a configuration, a light shielding film (LS) is provided only for the thin-film transistor included in one of the first group and the second group.

The invention provides a formation method of a Halo structure. The method can be used to form an ultra-shallow junction MOS device of a technology node with 65nm and below the 65nm. First kind of ion LDD Halo injection of a wide angle inclination mode and second kind of ion LDD Halo injection of a small angle inclination mode are combined so as to replace traditional phosphorus ion LDD Halo injection. Therefore, threshold shift is effectively reduced; junction capacitance and junction leakage can be effectively reduced too; SCE and DIBI effects are inhibited and an electrical property of the MOS device is increased.

The embodiment of the invention discloses a phase inverter, a display driven circuit and a display panel, wherein the phase inverter comprises a first control module, a first switch module, a second switch module, a second control module, and a first output module; the first switch module and the second switch module are connected and disconnected according to signals input by respective control terminals; in connection, level signals input by a first level signal input terminal are transmitted to the output terminal of the phase inverter; the control terminal of the second control module is electrically connected with the input terminal of the phase inverter, the input terminal thereof is electrically connected with a second level signal input terminal, and the output terminal thereof is electrically connected with the control terminal of the first switch module; by the first output module, level signals input by a third level signal input terminal are transmitted to the output terminal of the phase inverter when the first switch module is disconnected. By the technical solution provided in the embodiment, a threshold shift problem caused by connecting the switch modules in the phase inverter for a long time is solved and circuit stability is increased.

A semiconductor device has a substrate with a semiconductor material. The semiconductor device includes a field effect transistor in and on the semiconductor material. The field effect transistor has a gate dielectric layer over the semiconductor material of the semiconductor device, and a gate over the gate dielectric layer. The gate dielectric layer includes a layer of nitrogen-rich silicon nitride immediately over the region for the channel, and under the gate.

A method of controlling an automatic transmission includes determining whether a coast-down control condition is met, and performing coast-down control if the condition is met. The coast-down control includes selectively downshifting, such that engine speed is maintained above a fuel-cut threshold speed. The coast-down control condition may include a throttle opening being below a threshold opening, a shift-speed being higher than or equal to a threshold shift-speed, and a road slope being smaller than a predetermined slope. The method may also include determining whether a deceleration lock-up control condition is met, and performing deceleration lock-up control, including engaging a lock-up clutch, if the condition is met. The deceleration lock-up control condition may include a throttle opening being below a threshold opening, a shift-speed being below a threshold shift-speed, a brake not being operated, and a difference between an engine speed and a turbine speed being smaller than a reference value.

The present application discloses a GOA circuit and a liquid crystal display, the GOA circuit including: a pull-up circuit, including a first switching transistor; a pull-down circuit, including a second switching transistor; a scanning output terminal coupled to the second connecting terminal of the first switching transistor, and a first connecting terminal of the second switching transistor; and a clamping circuit, coupling to the second connecting terminals of the first switching transistor and the second switching transistor, and coupling to the control terminals of the first switching transistor and the second switching transistor, when the scanning output terminal outputting a first electric level, controlling the electric level of the control terminal of the second switching transistor lower than the electric level of the second connecting terminal of the second switching transistor. The present application prevents the transistor from erroneously turning on or off due to the turn on threshold shift.