Abstract: An illumination device system includes: an illumination device including an engaging portion configured to engage with an illumination device support base, a main body portion, a light emitting portion configured to swing around a turning axis in relation to the main body portion, and a cable extending from the main body portion; and a diffuser, and the diffuser swings around the turning axis between an advanced position positioned in front of the light emitting portion and a withdrawn position withdrawn from the front of the light emitting portion, and includes a first locking portion configured to engage with the illumination device support base and holds the diffuser at the advanced position, and a second locking portion configured to engage with the cable and holds the diffuser at the withdrawn position.

Abstract: An illumination device system includes: an illumination device including an engaging portion configured to engage with an illumination device support base, a main body portion, a light emitting portion configured to swing around a turning axis in relation to the main body portion, and a cable extending from the main body portion; and a diffuser, and the diffuser swings around the turning axis between an advanced position positioned in front of the light emitting portion and a withdrawn position withdrawn from the front of the light emitting portion, and includes a first locking portion configured to engage with the illumination device support base and holds the diffuser at the advanced position, and a second locking portion configured to engage with the cable and holds the diffuser at the withdrawn position.

Abstract: The present invention provides a method for manufacturing a wholly aromatic liquid-crystalline polyester resin comprising the steps of: 1) acylating the hydroxy group of major monomer components selected from the group consisting of aromatic hydroxycarboxylic acid, aromatic diol and aromatic dicarboxylic acid, with an acylating agent, provided that said major monomer components comprise at least one of aromatic hydroxycarboxylic acid and aromatic diol; and 2) polycondensing said major monomer components of which hydroxy group is acylated, wherein, the polycondensation reaction is carried out in the presence of a metal dihydrogen phosphate in an amount of 1-5000 ppm based on the total monomer components, and a liquid-crystalline polyester resin manufactured by the method and a composition comprising said resin.

Abstract: The present invention provides a method for manufacturing a wholly aromatic liquid-crystalline polyester resin comprising the steps of: 1) acylating the hydroxy group of major monomer components selected from the group consisting of aromatic hydroxycarboxylic acid, aromatic diol and aromatic dicarboxylic acid, with an acylating agent, provided that said major monomer components comprise at least one of aromatic hydroxycarboxylic acid and aromatic diol; and 2) polycondensing said major monomer components of which hydroxy group is acylated, wherein, the polycondensation reaction is carried out in the presence of a metal dihydrogen phosphate in an amount of 1-5000 ppm based on the total monomer components, and a liquid-crystalline polyester resin manufactured by the method and a composition comprising said resin.