Patent ID: 7648245
Filing Date: 2010-01-19
Classification: G03B,G06F,H04N

Abstract:
1. A cooling system for a thin projector having a panel-shaped housing and a projection lens unit arranged behind a front side of the housing, the front side of the housing being larger than side surfaces of the housing, the cooling system comprising: at least one heat source received in the housing; first and second suction ports formed in one of the side surfaces and in a lower surface of the housing, respectively; a discharge port formed in an upper surface of the housing; a first air stream forming unit to form a first air stream along which air induced from the first suction port is guided to the discharge port while cooling the at least one heat source; a second air stream forming unit to form a second air stream along which air induced from the second suction port is guided to the discharge port while cooling the at least one heat source; a sensor unit to detect respectively a temperature of suction air induced from the first and second suction ports and a temperature of discharge air discharged from via the discharge port; and a controller to control the first and second air stream forming units by calculating a temperature difference between the suction air and the discharge air and by determining a height value of the system from the calculated temperature difference, the height value indicating a fixed range of temperature differences determined by comparing the calculated temperature difference with a preset reference value for determining the height value, and the controller determining rotating speeds of the first and second air stream forming units according to the determined height value and the detected temperature of the suction air.