Abstract: A projector includes: a projection optical device; an exterior housing; a shutter; and a support member, the shutter and support member are provided with an engagement structure including an engagement protrusion which being provided on either one of them, protrudes along a vertical axis, and an engagement groove which being provided on the other, and extending in a direction in which the shutter moves, guides a movement of the engagement protrusion by the engagement protrusion being inserted therein, and the engagement groove is provided in such a way that a start end at which the engagement protrusion is positioned in the closed position is positioned to the projection optical device projection side of a finish end at which the engagement protrusion is positioned in the open position.

Abstract: A projector includes: a projection optical device; an exterior housing; a shutter; and a support member, the shutter and support member are provided with an engagement structure including an engagement protrusion which being provided on either one of them, protrudes along a vertical axis, and an engagement groove which being provided on the other, and extending in a direction in which the shutter moves, guides a movement of the engagement protrusion by the engagement protrusion being inserted therein, and the engagement groove is provided in such a way that a start end at which the engagement protrusion is positioned in the closed position is positioned to the projection optical device projection side of a finish end at which the engagement protrusion is positioned in the open position.

Abstract: Provided is a resin composition including cellulose acetate propionate; from about phr to about 30 phr of at least one of plasticizer selected from an adipate-based plasticizer and a polyester-based plasticizer; and from about 5 phr to about 50 phr of a condensed phosphoric acid ester compound.

Abstract: A polylactic acid-based resin composition includes (A) a polylactic acid-based resin; (B) a flame retardant compound; and (C) an ammonium compound of organic acid.

Abstract: There is provided a resin composition including cellulose ester in an amount of from about 50 to about 95 phr and an acrylonitrile-styrene copolymer-containing resin in an amount of from about 5 to about 50 phr.

Abstract: In a projection optical system comprising: two lens groups, and a curved plane mirror, wherein the projection optical system including two story structure, and having bend means for bending at least two times the light incident from an electro-optic modulator.

Abstract: A flame-retardant compound has a structure represented by formula (2): (Ar2—O—CO—O—)nA2-X-A1(—O—CO—O—Ar1)m??(2) wherein A1 and A2 each independently represents a substituted or unsubstituted aromatic group; X represents a divalent group represented by —S—, —O—, —CO—, —CN—, —CH2—, —C(CH3)2—, —CH(CH3)—, —NH—, —SO— or —SO2— Ar1 and Ar2 each independently represents a substituted or unsubstituted phenyl group; and m and n each independently represents an integer of 1 to 3.

Abstract: A resin composition containing at least (A) a polylactic acid, (B) a phosphazene compound, and (C) a rubber and/or thermoplastic elastomer.

Abstract: In a projection optical system comprising: two lens groups, and a curved plane mirror, wherein the projection optical system including two story structure, and having bend means for bending at least two times the light incident from an electro-optic modulator.

Abstract: In a projection optical system comprising: two lens groups, and a curved plane mirror, wherein the projection optical system including two story structure, and having bend means for bending at least two times the light incident from an electro-optic modulator.

Abstract: A projector is provided with a radiation source adapted to radiate an electromagnetic wave during an operation and an exterior housing adapted to house the radiation source inside, wherein the exterior housing includes a first housing made of synthetic resin, and a second housing including a shield material adapted to block the electromagnetic wave, and disposed at a position for covering the radiation source in a plan view.

Abstract: A projector includes a light source device, a holder that accommodates the light source device, and a resilient member formed by bending a bar-shaped metal component is provided. The holder has a receiving portion configured to pivotally support the resilient member in such a manner that the resilient member can rotate toward the inside and outside of the holder, and an engaging portion configured to engage with the resilient member to regulate the rotation of the resilient member toward the outside of the holder. The resilient member engages with the engaging portion under the condition in which the light source device is accommodated in the holder to bias the light source device toward the holder.

Abstract: A polylactic acid resin composition contains a polylactic acid resin having an epoxy group, and a flame-retardant additive.

Abstract: A surface-coated flame-retardant particle comprising a flame-retardant grain and a coated layer provided on a surface of the flame-retardant grain, wherein the coated layer comprises an organic compound or a polysilicone, the flame-retardant grain comprises a metal hydrate and has a volume average particle diameter of 1 to 500 nm, and the metal hydrate comprises Mg and at least one of Ca, Al, Fe, Zn, Ba, Cu, and Ni. Also provided is a flame-retardant resin composition comprising the surface-coated flame-retardant particle.

Abstract: A projector includes an exterior casing that includes an air intake port for introducing outside air into the interior thereof; and a cooling device that cools the interior of the exterior casing by the outside air introduced via the air intake port, in which the cooling device includes a first sirocco fan and a second sirocco fan that discharge air taken along axes of rotation of the fans to the direction along tangent of rotation, and an air intake port-side duct that guides the outside air introduced via the air intake port toward the first sirocco fan and the second sirocco fan, and in which the first sirocco fan and the second sirocco fan are disposed with axes of rotation thereof oriented so as to intersect with each other.

Abstract: A particle including: at least one selected from an ionic liquid that has, as an organic cation, one selected from cyclic amidine ion-based organic cations, pyridinium-based organic cations, ammonium-based organic cations, sulfonium-based organic cations, and phosphonium-based organic cations, or a liquid phosphate ester; and a polymer compound that serves as a base material, a resin composition including the particle and a resin molded article including the resin composition are provided.

Abstract: A resin composition containing at least (A) a polylactic acid, (B) a phosphazene compound, and (C) a rubber and/or thermoplastic elastomer.

Abstract: A polylactic acid-based resin composition includes (A) a polylactic acid-based resin; (B) a flame retardant compound; and (C) an ammonium compound of organic acid.

Abstract: A polylactic acid resin composition contains a polylactic acid resin having an epoxy group, and a flame-retardant additive.