| 摘要 |
PURPOSE:To enable a high efficiency with a low input power to be realized, by forming a cold cathode discharge lamp apparatus, in such a way as bending a glass bulb in a zigzag line, and regulating the bulb diameter, the arc length and the lamp current in specific values, and by combining it with an inverter circuit. CONSTITUTION:A cold cathode discharge lamp 8 is formed; by furnishing a phosphor layer 10 having its luminous peak within the blue, green, and red color area, inside a glass bulb 9 with outside diameter 5 to 10mm., bent into a zigzag line; arranging electrodes 11 of a metallic plate such as of nickel at the both ends of the bulb 9, making its arc length less than 400mm.; and moreover, regulating the operating lamp current between 2 and 10mA. Then it is connected to an inverter 1 which is linked with a d-c power source 6 through a capacitor 7, and thus a discharge lamp apparatus for a back light of a receiving image indication device is formed. Therefore, the apparatus can enlarge the area along the indication device and unify the brightness, as well as realizing a high efficiency with low input power. |
