摘要:
A combination-type high frequency inverter connects an isolation leakage transformer, a smoothing condenser, a resonance condenser, a first field-effect transistor and a second field-effect transistor to a diode bridge and rectifies the voltage of an AC power source in a non-smoothing rectification manner. A load circuit has a secondary winding of an isolation leakage transformer, a fluorescent lamp and a condenser. The ‘on’ duration of the first field-effect transistor is variable. The duration of on-duty of the second field-effect transistor is fixed. Adjusting charge voltage on the smoothing condenser changes the high frequency output voltage and the load characteristics. Load characteristics, optimal for the current mode, are given to the fluorescent lamp, in accordance with whether the flourescent lamp is in either start-up or luminance mode. Since the ‘on’ duration of the first-field effect transistor is variable, output compensation for fluxuation in source voltage is easily conducted.
摘要:
Disclosed is a high-pressure discharge lamp includes a translucent ceramics sealed container provided with an enclosed part with a discharge space formed therein, a pair of electrodes disposed inside of both end parts of the translucent sealed container, an ionization medium having a structure containing a metal halide that primarily emits light, a starting gas and substantially no mercury, the metal halide that primarily emits light including 30% by mass or more of a halide of at least one lanthanoid type rare earth metal and the starting gas having a pressure P (atm) satisfying the equation, 1≦P≦20, the ionization medium being sealed in the translucent ceramics sealed container, wherein the ratio D/G satisfies the equation, 0.3≦D/G≦2.4 when the maximum inside diameter of the translucent ceramics sealed container is D and the inter-electrode distance is G.
摘要翻译:公开了一种高压放电灯,包括设置有形成有放电空间的封闭部分的半透明陶瓷密封容器,设置在半透明密封容器的两个端部内部的一对电极,具有包含 主要发光的金属卤化物,起始气体和基本上不含汞,主要发射包含至少一种镧系稀土金属的卤化物的30质量%以上的金属卤化物和具有压力P( atm)满足方程式,1 <= P <= 20,将电离介质密封在半透明陶瓷密封容器中,其中D / G的比率满足方程式,当最大内径为0.3 <= D / G <= 2.4时 半透明陶瓷密封容器为D,电极间距为G.
摘要:
A fluorescent lamp lighting apparatus according to the present invention comprises an initial illuminance correction control circuit which sets a fluorescent lamp to an initial illuminance correction control lighting mode, a switching portion which changes the fluorescent lamp from the initial illuminance correction control lighting mode to an external control dimming mode when a predetermined external dimming signal is detected, and a control portion which gradually dimming so as to achieve a dimming level of a switched mode when switching the initial illuminance correction control lighting mode and the external control dimming mode, and control so as to achieve a dimming level corresponding to a cumulative lighting time of the fluorescent lamp when the changed mode is the initial illuminance correction control lighting mode.
摘要:
An analyzing apparatus has a partition dividing the interior of a housing into a lower space accommodating a power supply/control unit which generates heat and a duct and an upper space accommodating other units. Heat generated by cooling devices is exhausted to the exterior of the housing through the duct while the heat generated by the power supply/control unit is otherwise exhausted to the exterior. This construction makes it possible to achieve an improved heat exhaust efficiency and efficient cooling of a reaction unit provided in the upper space of the housing. A cover holding mechanism includes at least one each spring cam hinge and friction hinge. The spring cam hinge is formed of a cam mechanism and a spring which together produce a force acting on a cover in its opening or closing direction, the direction of the force reversing at a specific angle of the cover halfway between its open and closed positions, while the friction hinge produces a frictional force which works to hold the cover at any position between its open and closed positions. The spring produces an auxiliary force to facilitate cover-opening action, and the force produced by the spring works together with the frictional force to prevent the falling of the cover during its closing motion, enabling smooth cover-opening and closing actions.