Heat-dissipating device for liquid crystal display projector

A liquid crystal display projector comprising:

• three polarizers for polarizing red, green, and blue light, respectively;
• three liquid crystal displays for modulating said polarized red, green and blue light, respectively;
• a heat-dissipating channel disposed under said three liquid crystal displays and said three polarizers and comprising a main path, a first branch, a second branch and three vents corresponding to and adjacent to said three liquid crystal displays and said three polarizers;
• and
• a fan connected with an end of said heat-dissipating channel,
• wherein when an airflow is blown from said fan into said main path, said first branch and second branch and discharged outwardly through said three vents, heat generated from said three liquid crystal displays and said three polarizers is dissipated and temperatures around said three liquid crystal displays are kept near isothermal.

A heat-dissipating channel for being used in connecting with a fan and directing an airflow blown from said fan, comprising:

• a main path,
• a first branch connected with a first side of said main path;
• a second branch connected with a second side of said main path;
• and
• a regulation plate disposed at a entrance of said first branch for regulating a width of said first entrance to limit relative spaces of said first branch, said second branch and said main path.