Patent ID: 7553076

Claim:
A tap water temperature sensing type of light emitting apparatus, comprising: a power source ( 15 ) having a generator ( 10 ) having a magnetic turbine ( 11 ) disposed at a tap end portion, where water comes out and a coil ( 13 ) fixed around the magnetic turbine ( 11 ) with a result that the magnetic turbine ( 11 ) is rotated as the water drops from the tap end portion, thereby generating alternating current, and a rectifier ( 20 ) adapted to transform the alternating current generating from the generator ( 10 ) to direct current; a control unit ( 30 ) for sensing opening/closing state of the tap tube to control the power source ( 15 ) such that if the tap tube is opened, the power source ( 15 ) is enabled and if the tap tube is closed, the power source ( 15 ) is stopped; a sensing unit ( 40 ), powered by the power source ( 15 ), disposed around a portion where hot water and cool water meet for sensing the temperature of water in a tap tube; and a light emitting unit ( 50 ) powered by the power source ( 15 ), which includes at least two light emitting diodes, for producing different color lights in accordance with the water temperature read in the sensing unit ( 40 ); and wherein: said sensing unit ( 40 ) comprises: a common electrode (k 2 ) extended to a portion where hot water and cool water meet in the tap tube at one end thereof and connected to power at the other end thereof, and first and second electrodes (k 1 and k 3 ) placed at left and right sides of the common electrode (k 2 ) in such a manner as to be submerged partially in the tap water; and the light emitting unit ( 50 ) comprises: a high temperature driver ( 57 ) connected to an end of the first electrode (k 1 ) that is not submerged in the tap water, a low temperature driver ( 55 ) connected to an end of the second electrode (k 3 ) that is not submerged in the tap water, a high temperature light emitting element connected to the high temperature driver ( 57 ) for emitting a light when the tap water is more than a predetermined temperature (T 2 ), and a low temperature light emitting element connected to the low temperature driver ( 55 ) for emitting a light when the tap water is less than a predetermined temperature (T 1 ).