1673 results about "Operating life" patented technology

Azatriphenylene derivatives and their use in the electron-transporting layer of an electroluminescent device that comprises an anode, a spaced-apart cathode, and at least one electron-transporting layer disposed between the spaced-apart anode and cathode. Such EL devices provide lower drive voltage, improved power efficiency, and longer operational lifetime.

A light source apparatus which is improved in the efficiency of light emission thus to increase the operating life and the mechanical strength and a method of producing the same are provided. The light source apparatus 1 comprises a radiator plate 3 having thermally conductive properties, an insulating member 4 coupled to at least one side of the radiator plate 3 and having a through hole 6 provided in the side thereof facing the radiator plate 3, an LED chip 2 installed and thermally coupled to an exposed portion of the radiator plate 3 facing the through hole 6, an extension 4a inwardly projecting at the hole 6 from the radiator plate 3 end of the insulating member 4, a wiring pattern 8 provided on the insulating member 4 and electrically isolated by the insulating member 4 from the radiator plate 3, bonding wires 9 electrically connecting between portions of the wiring pattern 8 extended to the extension 4a and the electrodes of the LED chip 2, and a light-transmissive sealing material 10 filled in the through hole 6 for entirely encapsulating the LED chip 2 and the bonding wires 9.

Methods and systems are provided for controlling a power transfer rate in to and/or out of a vehicle energy storage device to affect a current state of charge of the energy storage device. The vehicle may be on a mission comprising a plurality of future power transfer opportunities. In one example, the method comprises adjusting the power transfer rate based on an estimated duration of a future power transfer opportunity. Further, the method may include, if the estimated duration of the future power transfer opportunity is different from a predetermined threshold, changing the power transfer rate at the future power transfer opportunity. The method allows the operating life of the energy storage device to be extended.

LED calibration systems and related methods are disclosed that use the photo-sensitivity of LEDs to correct for variations between LEDs during initial production and over the lifetime of systems using LEDs. The disclosed systems and methods include methods to set the color or color temperature produced by a group of LEDs during the manufacturing of a device such as a lamp, an LED display, or an LCD backlight, and maintaining such color or color temperature over the operating life of such a device. The methods involve measuring the intensity and/or wavelength of light produced by each LED within a group of LEDs and adjusting an amount of light generated by the LEDs to produce precise color and intensity from the group of LEDs. Two methods that operate some of the LEDs in photovoltaic or photoconductive mode to measure the light intensity produced by other LEDs in the group are presented. The first method uses an additional light source as a reference and determines the light intensity emitted from each LED relative to such reference, while the second method determines the light intensity emitted from each LED relative to each other.

A method for predicting the remaining useful life of an engine (10) having components (18, 19, 22, 23) that are instrumented with sensors (50) that generate electronic data signals indicative of an operating condition of the component comprises identifying (52) one or more components and at least one failure mode for each component that limit an operating life of the components and engine (10). The method further comprises acquiring (62) and storing data relative to current operating conditions of the components associated with the identified failure mode; and, then determining (68) a remaining useful life of the component based on the data relative to current operating condition of the components, the data relative to historical data of the operating condition associated with the failure mode and a predicted failure mode rate.

A method and apparatus for automatically identifying the contents of an instrument tray by use of a radio-frequency tag (RFID) is disclosed. The method, apparatus, and system enable the instrument tray to receive an interrogation signal from a reader and to respond to the interrogation signal with a code comprised of its identifying information as well as its contents of radio frequency tagged instruments. Both the instrument tray and/or the reader may be coupled by a proximity electromagnetic field, an inductive coupling, or may be units of a wireless LAN system such as a wireless fidelity local area network. The interrogation signal interrogates the tray to ascertain its contents, and the tray in turn transmits a signal to the reader to inform the reader of its contents. The method, apparatus, and system can track, inspect, and verify inbound and outbound surgical instrument trays and kits, to assess, for example, the surgical instruments' and trays' duty life cycle usage.

A submerged membrane assembly including a membrane having a first surface, a second surface, and a vertical axis, and which is permeable between the surfaces by molecules of less than a predetermined size. A first fluid compartment in fluid communication with the first membrane surface and that contains at a first column height a first fluid having a first specific gravity, a second fluid compartment in fluid communication with the second membrane surface and that contains at a second column height a second fluid having a second specific gravity, and means for changing the second specific gravity. The second column height being selected relative to the first column height to produce a selected pressure differential across the membrane along the vertical axis at the first specific gravity and the changed second specific gravity.

An organic electroluminescent device comprises an anode, a hole injection layer as CFx formed on the anode, a first hole transport layer formed on the hole injection layer and the first hole transport layer doped with a P-type dopant, a second hole transport layer formed on the first hole transport layer, a light emitting layer formed on the second hole transport layer, an electron transport layer formed on the light emitting layer, and a cathode formed on the electron transport layer. According to the structure of the organic electroluminescent device disclosed in the present invention, the hole injection layer and the first hole transport layer provide the function of increasing the efficiency of the hole injection so as to improve the operating life and stability of the device.

A thermal management system for reducing or eliminating heat-mediated degradation of LED performance and/or operating life. The system may include a thermal controller arranged to respond to an LED operating condition, and to responsively limit temperature in the LED. The thermal controller in one implementation includes a bypass circuit containing a bypass control element, such as a varistor, Zener diode, or antifuse device, and arranged to divert current from flowing to the LED so that the LED remains in a cool state, e.g., below 75° C. The system may be arranged to (I) at least partially attenuate the power supplied to an LED so as to reduce heat generation in such LED and maintain the LED below a threshold temperature and/or (II) remove heat from the LED to maintain temperature of the LED below a threshold temperature.

A vertical electrode structure of GaN-based light emitting diode discloses an oxide window layer constructing the GaN-based light emitting diode of vertical electrode structure, which effectively decreases the Fresnel reflection loss and total reflection, and further advances the luminous efficiency. Moreover, the further included metal reflecting layer causes the reflection without the selective angle of incidence, thus increasing the coverage of the reflecting angles and further reflecting the light emitted from a light emitting layer effectively. In addition, the invented structure can also advance the function of heat elimination and the electrostatic discharge (ESD) so as to the increase the operating life of the component and to be applicable to the using under the high current driving. Moreover, the vertical electrode structure of the present invention is able to lower down the manufacturing square of the chip and facilitate the post stage of the conventional wire bonding process.

The invention relates to a battery energy storage system based power conversion system and a control method thereof. The power conversion system comprises a battery energy storage system, a bidirectional DC/DC (direct-current) converter, a grid-side current transformer, a filter circuit and an isolated voltage transformer. The battery energy storage system is in parallel connection with a direct-current bus of the grid-side current transformer through the bidirectional DC/DC converter; the grid-side current transformer, the filter circuit and the isolated voltage transformer are connected in sequence; and the isolated voltage transformer accesses to a power grid. The control method includes sequentially monitoring the battery energy storage system, the bidirectional DC/DC converter, the grid-side current transformer, the filter circuit and the isolated voltage transformer by a control circuit. Since the battery energy storage system utilizes battery cells connected in series and is in parallel connection with the common direct-current bus through the bidirectional DC/DC converter, circulation among battery packs is avoided, and capacity expansion of the system is facilitated. Further, by the aid of the monitoring control strategy for SOC (super capacitor state of charge) of the battery energy storage system and battery end voltage, excessive charge or discharge state of the battery energy storage system is avoided, service lives of the battery packs are prolonged, and comprehensive service cost is lowered.

In a wireless communication system having a base station and a terminal, it is important to extend the operating life of the terminal in the case of using a battery as the power supply of the terminal. Particularly in the case where a state in which a base station is not present in the range within which the terminal can communicate lasts long, the reduction of the electric power consumption during the standby of the terminal becomes an issue. The terminal monitors the received signal power strength of a signal transmitted by the base station. When the power strength exceeds a prescribed value, it is considered that the base station is present and the base station performs operations for carrying out communication with the base station.

A lighting system is provided whereby long operating life can be reasonably ensured by taking into account requirements of the application, characteristics of the LEDs, characteristics of the fixture containing said LEDs, the desired number of operating hours, and—via developed relationships—taking an iterative approach to supplying power to the LEDs. Through the envisioned compensation methodology and effective luminaire design, a relatively constant light level can be assured for a predetermined number of operating hours (possibly longer); this is true even if operating conditions change, known behavior of LEDs proves untrue over untested period of time, or some other condition occurs which would otherwise cause end-of-life prematurely and prevent the system from meeting the desired number of operating hours.

The invention relates to a shift register and a grid driving device for a liquid crystal display. The shift register comprises a first thin film transistor, a second thin film transistor, a third thin film transistor and a fourth thin film transistor and further comprises a pull-down thin film transistor driving unit and a pull-down thin film transistor, wherein the pull-down thin film transistor driving unit is used for controlling the turn-on of the pull-down thin film transistor when a signal output terminal outputs low level and the signal input by a first clock signal input terminal is high level; and the grid of the pull-down thin film transistor is connected with the pull-down thin film transistor driving unit, a drain electrode is respectively connected with the signal output terminal, a first capacitor and the drain electrode of the first thin film transistor, and a source electrode is connected with a low voltage signal input terminal. The shift register and the grid driving device for the liquid crystal display can effectively inhibit the noise from being output and can ensure that the large threshold voltage deviation cannot be generated for the shift register and all the thin film transistors in the grid driving device, so that the normal operating life of the shift register and the grid driving device is ensured.

The flash memory controller compresses data in response to a write request. On condition that there is a compression effect with respect to the compressed data, the flash memory controller writes the compressed data to the base area of a physical block of a flash memory. As physical pages assigned to the physical block, the flash memory controller reduces the physical pages assigned to the base area from 102 down to 59, and increases the physical pages assigned to the update area from 26 up to 69. Therefore, it is possible to suppress exhaustion of physical pages which are assigned to the update area, to reduce the number of erases of the physical block, and to consequently prolong device operating life.

A wall construction for a combustion chamber or thrust nozzle of a high power engine of a flying body includes an inner wall body that is subjected to the hot gases within the combustion chamber, and an outer jacket that surrounds the inner wall body and carries the mechanical loads. The inner wall body has a plurality of cooling channels through which a cooling medium may flow. The outer jacket is made of a long-fiber C/SiC composite material, while the inner wall member is made of a short fiber C/SiC composite material. The reduced thermal expansion coefficient of this ceramic composite material in comparison to metal alloys leads to a reduced straining and reduced deformation of the wall construction and therewith an increased operating life.

A photo sensor is disposed on the same substrate as that of a display area. External light sensed by the photo sensor is inputted into a luminance adjustment controller, and luminance necessary to maintain constant contrast is obtained. A correction value corresponding to the luminance to be adjusted is outputted as a white reference voltage or a value of a CV power source to be fed back to the display area. Constant contrast of the display area can be maintained even when surrounding light intensity varies. Moreover, an amount of electric current is adjusted according to the ambient light, leading to reduction in power consumption and extension of operating life.

An age compensation method and apparatus for an integrated circuit (IC). An IC may be configured to operate at an initial operating voltage at the beginning of its operational life. Various circuits may be used to detect aging of the IC, and indications of aging may be stored to determine the aging of the IC. The information indicative of the determined aging of the IC may be compared to an aging threshold. If the information indicates that the aging is greater than or equal to the determined aging threshold, the operating voltage of the IC may be increased. This process may be repeated over the life of the IC, increasing the operating voltage as the IC ages. Raising the operating voltage in response to aging may compensate for various age related degradation mechanisms that can occur over the operational life of the IC.

Performance parameters for a reciprocating pump including pulsation energy, temperature energy, solids, Miller number and chemical energy and the like are monitored and employed to at least periodically compute a total energy number over the operating life of the pump. The current computed value is compared to a predictive failure value empirically determined for the respective pump design, to determine when failure is likely to be imminent. Scheduling of maintenance with other pumping operations and objective rating of competing designs is possible based on the total energy number.