Patent ID: 8690346
Filing Date: 2014-04-08
Classification: G03B

Abstract:
1. A projection display apparatus comprising a cooling structure for an optical part, said cooling structure comprising: a first wind outlet for blowing a first cooling wind so that the first cooling wind passes along said optical part; and a second wind outlet which is provided at a location different from a location of said first wind outlet and which is for blowing a second cooling wind so as to allow the second cooling wind to interfere with the first cooling wind from said first wind outlet at said optical part, wherein a first duct is provided at a lower side, in a gravity direction, of said optical part, said first duct having said first wind outlet opened in a top surface, in the gravity direction, wherein a second duct is provided in a shape of a smokestack along an upper portion, in the gravity direction, from a lower portion, in the gravity direction, of an end surface of one side or end surfaces of both sides of said optical part, having said second wind outlet opened in a side surface, wherein said optical part comprises a liquid crystal panel unit used as a light valve, the liquid crystal panel units being provided to correspond to three colors of red, green, and blue, and two of said second duct are provided, wherein one of the two second ducts is disposed to correspond to an end surface at one side of end surfaces at both sides of said liquid crystal panel unit used for one color, and to an end surface at one side of said liquid crystal panel unit used for one of remaining two colors, and wherein another one of said two second ducts is disposed to correspond to the end surface at another side of the end surfaces at both sides of said liquid crystal panel unit used for said one color, and to an end surface at one side of said liquid crystal panel unit used for another color of said remaining two colors.