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544 results about "Short life" patented technology

Organic electroluminescent device and display device

The invention provides an organic electroluminescent device and a display device. The organic electroluminescent device comprises an organic luminescent layer; the organic luminescent layer comprisesa main body material, a sensitizing agent material and a resonance thermally activated delayed fluorescence (TADF) material; the main body material is a broad-band gap material; the sensitizing agentmaterial is a thermally activated delayed fluorescence material; a singlet-state energy level of the thermally activated delayed fluorescence material is located between a singlet-state energy level of the broad-band gap material and a singlet-state energy level of the resonance thermally activated delayed fluorescence material; and a triplet-state energy level of the thermally activated delayed fluorescence material is located between a triplet-state energy level of the broad-band gap material and a triplet-state energy level of the resonance thermally activated delayed fluorescence material.With the organic electroluminescent device and the display device, the defects of short life time and wide spectrum of the device caused by a condition that the traditional TADF material is adopted to emit light at the present stage can be overcome.
Owner:KUNSHAN GO VISIONOX OPTO ELECTRONICS CO LTD +1

Organic light-emitting display device

An object of the present invention is to provide an organic light-emitting display device using a number of organic light-emitting elements that emit lights of different colors, wherein the life of the organic light-emitting elements that emits light of a color having a short life can be prolonged. According to the present invention, a hole injection layer 7, an α-NPD vapor deposited film 8, an n doped electron transportation layer 11 and a p doped hole transportation layer 12, which are patterned to the same size as B sub-pixels, a DNA vapor deposited film 13, an electron injection layer 14 and an upper electrode 15 are formed on a lower electrode 5 in a B sub-pixel. The α-NPD vapor deposited film 8 and the DNA vapor deposited film 13 function as a blue light-emitting layer and exhibit the same properties as when a blue light-emitting element made up of a lower electrode 5, a hole injection layer 7, an α-NPD vapor deposited film 8 and an n doped electron transportation layer 11 and a blue light-emitting element made up of a p doped hole transportation layer 12, a DNA vapor deposited film 13, an electron injection layer 14 and an upper electrode 15 are connected in series. Therefore, it becomes possible to lower the value of a current required for certain brightness, and thus, the life can be prolonged.
Owner:PANASONIC LIQUID CRYSTAL DISPLAY CO LTD +1

Bearing steel,method for evaluating large-sized inclusions in the steel and rolling bearing

A first object is to provide a method for evaluating large-sized inclusions in a bearing steel. The method enables quantitative evaluation of large-sized inclusions even if the steel has a high degree of cleanliness. Further, a second object is to provide an appropriate bearing steel evaluated by the method for evaluating large-sized inclusions. Further, a third object is to provide a rolling bearing capable of eliminating short life products and cracked products and providing longer lifetime for entire bearings. In order to achieve the first object, a round bar formed of a bearing steel to be evaluated and an ultrasonic probe are placed in an ultrasonic transmission medium, and the size and number of large-sized inclusions that are present in the flaw detection volume are measured to estimate the existence probability of large-sized inclusions in the bearing steel to be evaluated. The second object is achieved by specifying large-sized inclusions that are present in the bearing steel in accordance with the method for evaluating large-sized inclusions. Further, to achieve the third object, a rolling bearing is manufactured from a seamless steel tube, as material, having a diameter of 180 mm or less and a wall thickness of 25 mm or less, and ensured that it does not include a defect having a length of 1 mm of more at its material stage.
Owner:NSK LTD

Method for removing Se(IV)/Se(VI) from water by magnetic field enhanced zero-valent iron

The invention relates to a method for removing Se(IV)/Se(VI) from water by magnetic field enhanced zero-valent iron and relates to a water and waste water treatment method. The method solves the problems of low reaction speed of the conventional micron-sized zero-valent iron/iron scrap and the Se(IV)/Se(VI), low removal efficiency, narrow pH application range and short life of the zero-valent iron. The method adopts the following modes: (1) a stationary bed mode: applying magnetic field at the periphery of the zero-valent iron stationary bed and allowing the Se(IV)/Se(VI)-containing water to pass through the zero-valent iron stationary bed to be purified; and 2) a completely mixed reactor mode: adding a certain amount of zero-valent iron in the Se(IV)/Se(VI)-containing water, magneticallystirring or externally applying the magnetic field to realize quick reaction of the micron-sized zero-valent iron/iron scrap and the Se(IV)/Se(VI) so as to purify the water. According to the method, the magnetic field can inhibit generation of a zero-valent iron passivation film, the mass transfer speed of the Se(IV)/Se(VI) and the micron-sized zero-valent iron/iron scrap is increased and the removal efficiency of the micron-sized zero-valent iron/iron scrap on the Se(IV)/Se(VI) is greatly improved.
Owner:TONGJI UNIV +1

Ac-powered LED light engines, integrated circuits and illuminating apparatuses having the same

Disclosed are novel AC-powered LED light engines for Solid State Lighting (SSL) able to achieve a high PF and a low THD without a traditional PFC. Getting rid of bulky, and costly magnetic components, short-life electrolytic capacitor, and EMI-causing fast switching, the disclosed AC-powered LED light engines ushers in a cost-effective, and energy-efficient LED driver design while eliminating the short-life electrolytic capacitor in an LED driver and reducing the Total Cost of Ownership (TOC). Thanks to no bulky components, the disclosed AC-powered LED light engines in a discrete or an integrated circuit form could be applied to the increasingly popular Driver-on-Board (DoB) design. Aside from being TRIAC-dimmable via legacy phase-cut dimmers, the disclosed LED light engines could also be made PWM-, analog-, or rheostat-dimmable with the incorporation of an appropriate dimming circuit to modulate the average LED current, adding more flexibility and versatility to dimming applications.
Owner:GRP TECH

Lithium ion battery negative electrode single-side pre-lithiation method using three-dimensional foil

The invention provides a lithium ion battery negative electrode single-side pre-lithiation method using a three-dimensional foil. The method comprises the following steps: 1, coating a three-dimensional current collector with a negative electrode slurry, and performing rolling to obtain a rolled electrode sheet; 2, performing pre-lithiation compounding on the electrode sheet: carrying the following two pre-lithiation processes according to the difference of lithium metal raw materials: uniformly spraying or coating one side of the rolled electrode sheet with lithium metal powder through a lithium metal powder pre-lithiation process or bonding and compounding one side of the rolled electrode sheet with a lithium foil under a certain pressure by adopting a lithium foil pre-lithiation process; and 3, assembling a positive electrode, a diaphragm and the negative electrode obtained after the pre-lithiation compounding is completed in order to form a battery cell, and performing electrolyteinjection and formation on the battery cell. The lithium ion battery negative electrode single-side pre-lithiation method using the three-dimensional foil solves the problems of swelling peeling, short life and low capacity of a silicon carbide/graphite electrode; and two-side pre-lithiation is simplified into single-side pre-lithiation, so the pre-lithiation efficiency is improved.
Owner:TIANJIN ENERGIES

Method and apparatus for executing dynamic memory management with object-oriented program

The disclosure is a method and apparatus for operating dynamic memory management with an object-oriented program, by which objects with frequent creation and short life spans are allocated to a unit memory block in sequence. After released from the unit memory block, the objects are added on a free re-use list so as to be reused when there is an invocation of allocation for the same object size. It is advantageous to enhancing system performance.
Owner:SAMSUNG ELECTRONICS CO LTD
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