Patent ID: 8393739
Filing Date: 2013-03-12
Classification: G03B

Abstract:
1. A heat-dissipating device used in a projection display apparatus with an air outlet, comprising: a fence module disposed at the air outlet, the fence module comprising a plurality of guiding plates, a plurality of axles corresponding to the guiding plates respectively, and a lever, and each of the axles pivots on a pivot of each of the guiding plates correspondingly; at least one resilient member exerting a first force on each of the guiding plates to enable each of the guiding plates to rotate on the pivot; and a shape memory alloy module capable of exerting a second force on each of the guiding plates to enable each of the guiding plates to rotate on the pivot, wherein the shape memory alloy module deforms to any shape under normal temperature when external forces exert thereon and recovers to the original shape when heated as a result of high-temperature caused by the operation of the projection display apparatus, and wherein the lever connected with the guiding plates, the resilient member, and the shape memory alloy module.