| 摘要 |
A flat discharge lamp includes a projection formed on an outer surface of a case body. The projection forms a thick portion, which is relatively thick, in the case body. An intake-outtake port is formed in the thick portion so that it can receive a chip tube having an outer diameter of a size larger than or the same as a gap. The large chip tube can be coupled to a hermetic case without any limitations resulting from the gap of a discharge chamber (15). The large chip tube resists damaging and improves gas replacement efficiency in the discharge chamber without affecting discharge characteristics of the flat discharge lamp.
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