To provide a structure capable of preventing a space between a grid and a shield member from being filled with a gas generated from the grid caused by collision of the electron beam from an electron emitting layer at a position in the vicinity of an electron beam passage port of the grid, and a gas generated by heating of the electron emitting layer, and of preventing abnormal discharge caused by the filled gas, in an electron beam excitation type light source having a semiconductor light-emitting element excited to emit light by the electron beam emitted from an electron beam source.
An electron passage port is formed to the grid, and a gas exhaustion port communicated with a space between the grid and the shield member is formed at a position not being opposed to an electron emission opening of the shield member, of a periphery of the electron passage port.
MAESO TAKESHI
TAKADA HIROYUKI
INOUE TAKAHIRO
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