Abstract: Disclosed herein is an organic electroluminescent (EL) device comprising an intermediate layer made of at least one selected from a hole blocking material and an electron blocking material.

Abstract: An organic electroluminescent (EL) device having improved efficiency and service life is provided. The organic electroluminescent device has a stack structure including an emitting layer and an electron-transport layer positioned between an anode and a cathode. The electron-transport layer includes a first layer adjacent to the emitting layer which may be a mixture of at least two materials, and a second layer adjacent to the cathode which may be a mixture of at least two materials. The mixture of at least two materials may be a mixture of an organic compound and one or more other organic compounds, or may be a mixture of a metal or inorganic compound and one or more other metal or inorganic compounds, or may be a mixture of one or more organic compounds and one or more metal or inorganic compounds.

Abstract: An organic electroluminescent (EL) device is provided which uses an electron-transport layer including hole blocking capability. The device includes a stack structure, with an emitting layer and an electron-transport layer provided between an anode and a cathode. The electron-transport layer is a mixture of at least two materials. This mixture may include an organic compound and one or more other organic compounds, or may include a metal or inorganic compound and one or more other metal or inorganic compounds, or may include one or more organic compounds and one or more metal or inorganic compounds. By incorporating a hole blocking capability into the electron-transport layer, structure and fabrication of the device is simplified and efficiency is increased.

Abstract: Disclosed herein is a pressure-dependent automatic leak valve for sphygmomanometers which is able to regularly reduce the pressure in a cuff without manipulation of a pressure reducing valve. The pressure-dependent automatic leak valve of the present invention includes an outer casing, with an inlet port formed at a predetermined position in the outer casing so that air is drawn from the cuff into the outer casing, and an outlet port formed at a predetermined position in the outer casing so that the air, drawn through the inlet port, is discharged outside through the outlet port. The pressure-dependent automatic leak valve further includes a movable member which has a diameter smaller than an inner diameter of the outer casing and inserted into the outer casing, and a spring which supports the movable member in the outer casing. In the present invention, the height of the movable member is changed according to the pressure in the cuff.

Abstract: Disclosed herein is a vacuum assisted auto-lancing device. The device includes a housing (200) having a body (210) which has a lever hole. An actuating lever (300) includes an actuating switch (310) seated on the lever hole and having first and second actuating steps, a switch cap (320), and a switch cover (330). The device also includes a holding unit (400) having a first stem (410), a second stem (430), and a stem cap (450). A trigger (500) has a first trigger unit activated by the first actuating step, and a second trigger unit activated by the second actuating step. A lancet holder (524) holding a lancet (522) is secured to an end of the first trigger unit. The device includes a blood collecting unit (600) having an adjusting screw, an adjusting slider, and an end cap, and a vacuum unit (700) having a plunger and a body cap.

Abstract: Disclosed herein is a method of measuring an absolute lung volume. In the method, concentrations of oxygen and carbon dioxide gases are measured and analyzed in respiratory gas, consisting of nitrogen (N2), oxygen (O2), and carbon dioxide (CO2), to indirectly measure a concentration of nitrogen, thereby achieving measurement of absolute lung volume, such as a functional residual capacity.

Abstract: Disclosed herein is a peak expiratory flow meter capable of measuring continuous expiratory flow. The peak expiratory flow meter includes a lower casing unit (110), an air expansion unit (130) and an upper casing unit (150). The lower casing unit (110) includes a first body (112) having an open top and open opposite sides and having a first end in which a first expiratory flow entrance (114) is formed, a plurality of rails (118), and a movable plate (122). The air expansion unit (130) includes a pressure transfer tube (132), an elastic plate (136), and a pressure spring (140). The upper casing unit (150) includes a second body (152) adapted to define the air expansion unit and provided with a first end in which a second expiratory flow entrance (154) is formed, and a measurement slot (156), and a scale indicator (160) having a “T” shape.