PROJECTOR DEVICE – SANYO ELECTRIC CO., LTD ...

Our analysis of this patent is as follows: Sanyo's patent US20110211166 deals with projector device – sanyo electric co., ltd. . 1. Field of the Invention The present invention relates to a projector device for modulating light emitted from a light source by an optical element, and a projection light image after the modulation onto a screen by a projection lens. 2. Description of the Related Art There is known a projector device including a light source, an optical element for modulating light emitted from the light source in accordance with video information, a projection lens for projecting a modulated projection light image onto a screen, and an air blower for blowing air to the optical element to cool the optical element (for example, see JP-A-2003-066534). In this type projector device, a turbulent flow promoting member extending in a direction perpendicular to air flow from an air blow-out opening through which air blown from an air blower is blown out to the optical element is provided between the air blow-out opening and the optical element, and the air flow is disturbed by the turbulent flow promoting member to thereby promote heat transfer and thus enhance the cooling efficiency. However, in the construction of the above projector, the turbulence promoting member is disposed at the upstream side of the optical element, and thus turbulence flow is reduced at a place which is far away from the turbulence flow promoting member, for example, in the neighborhood of the center of the optical element or at the downstream side of the optical element. Therefore, the heat transfer effect is insufficient, and the cooling efficiency is not sufficiently enhanced. The Sanyo patent solves the following problem: A projector device including a light source, a plurality of panels for modulating light emitted from the light source in accordance with video information, the panels containing a liquid crystal panel and a plurality of polarizing panels arranged in parallel, an air blower for blowing air to the liquid crystal panel and the plurality of polarizing panels, a housing in which the light source, the liquid crystal panel, the polarizing panels and the air blower are mounted, and a turbulence promoting member for disturbing an air stream flowing between two adjacent panels is provided at an upstream position of the air stream in a gap between the two adjacent panels so as to extend in a direction perpendicular to the air stream. Therefore, an object of the present invention is to solve the above problem of the conventional technique and provide a projector device that enhances a cooling efficiency. In order to attain the above object, there is provided a projector device comprising: a light source; a plurality of panels for modulating light emitted from the light source in accordance with video information, the panels containing a liquid crystal panel and a plurality of polarizing panels arranged in parallel; an air blower for blowing air to the liquid crystal panel and the plurality of polarizing panels; a housing in which the light source, the liquid crystal panel, the polarizing panels and the air blower are mounted; and a turbulence promoting member for disturbing an air stream flowing between two adjacent panels is provided at an upstream position of the air stream in a gap between the two adjacent panels so as to extend in a direction perpendicular to the air stream. In the above projector device, the turbulence promoting member is disposed in proximity to an optical path of the panel. In the above projector device, the turbulence promoting member is disposed to be near to an incident face of the polarizing panel. In the above projector device, each of the polarizing panels is formed by joining polarizing film to a surface of a glass base material, and the turbulence promoting member is disposed to be near to the polarizing film. In the above projector device, the cross-sectional shape of the turbulence promoting member is designed in a rectangular shape whose one side is perpendicular to the air stream. In the above projector device, the turbulence promoting member is designed to have an outer shape whose dimension is substantially equal to substantially one third of the gap between two adjacent panels. According to the present invention, the turbulence promoting member for disturbing an air stream flowing between two adjacent panels is provided at an upstream position of the air stream in a gap between the two adjacent panels so as to extend in a direction perpendicular to the air stream. Therefore, turbulence generated by the turbulence promoting member can be kept even in the neighborhood of the panels and at the downstream side of the air stream, so that the heat transfer can be promoted and the cooling efficiency can be enhanced. For patent services, please contact Tran & Associates and PowerPatent. This entry was posted in Uncategorized. Bookmark the permalink.

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