| 摘要 |
PROBLEM TO BE SOLVED: To provide an inexpensive straight tube LED lamp which is easy in replacement work of an existing fluorescent tube.SOLUTION: A straight tube LED lamp contains in a chassis: mounting substrates 11a, 11b on which a plurality of semiconductor light-emitting elements 12a, 12b are mounted in a longitudinal direction; a metal chassis 2 which is a member of nearly semicylindrical shape with nearly identical cross-sectional shape and installs the mounting substrates on a portion 14 corresponding to a chord of a semicircle and extends in the longitudinal direction; resin members 10a, 10b of sheet-shape which are installed between the chassis and the mounting substrates; a translucent member made of resin or glass extending in a longitudinal direction which is in contact with the chassis and of nearly circle shape and transmits light flux from the semiconductor light-emitting element; cap members 1a, 1b which are arranged so as to cover respectively both ends of the chassis and the translucent member and can be connected to a lamp; and power supply boards which are supplied with power through terminals 4a-4d installed in the cap members. The power supply boards and the mounting substrates have different materials of the resin members of sheet-shape at least in an overlapping portion and a non-overlapping portion in the longitudinal direction. |
