Temperature controlling system adapted for a projection apparatus

Abstract

A temperature controlling system adapted for a projection apparatus is provided. The projection apparatus comprises at least a heat generating element, while the temperature controlling system comprises a liquid flow system, a heat generating device, and a heat transferring device. The liquid flow system is disposed along the heat generating element. The heat generating device produces heat with a positive value (endothermic) or a negative value (exothermic) in response to an environment dependent on the location of the projection apparatus. The heat transferring device transfers the heat generated by the heat generating device along the liquid flow system. The present invention maintains the operation of the projection apparatus under the desired working temperature and enables a thermal equilibrium of the projection apparatus without being influenced by the over-temperature or under-temperature of the external environment.

1 . A temperature controlling system adapted for a projection apparatus, the projection apparatus comprising at least one heat generating element, the temperature controlling system comprising:
 a liquid flow system, disposed along the at least one heat generating element;   a heat generating device for selectively generating heat with a positive value or a negative value in response to a temperature lower than or a temperature higher than an ambient temperature, respectively where the projection apparatus is located; and   a heat transferring device for transferring the heat generated by the heat generating device along the liquid flow system, thereby maintaining the projection apparatus at operation under a desired working temperature.   
   
   
       2 . The temperature controlling system as claimed in  claim 1 , wherein the liquid flow system is substantially connected with the at least one heat generating element of the projection apparatus. 
   
   
       3 . The temperature controlling system as claimed in  claim 1 , wherein the liquid flow system contains a liquid having high specific heat. 
   
   
       4 . The temperature controlling system as claimed in  claim 1 , wherein the heat transferring device is at least one fin. 
   
   
       5 . The temperature controlling system as claimed in  claim 1 , wherein the heat transferring device is at least one fan. 
   
   
       6 . The temperature controlling system as claimed in  claim 1 , wherein the heat generating device is a thermal electric (TE) device. 
   
   
       7 . The temperature controlling system as claimed in  claim 1 , wherein the thermal electric device is a TE cooler. 
   
   
       8 . A temperature controlling system adapted for a projection apparatus, the projection apparatus comprising at least one heat generating element, the temperature controlling system comprising:
 a liquid flow system, disposed along the at least one heat generating element;   a heat generating device for generating a heat with a positive value in response to a temperature lower than an ambient temperature where the projection apparatus is located; and   a heat transferring device for transferring the heat generated by the heat generating device along the liquid flow system, thereby maintaining the projection apparatus at operation under a desired working temperature.   
   
   
       9 . The temperature controlling system as claimed in  claim 8 , wherein the liquid flow system is substantially connected with the at least one heat generating element of the projection apparatus. 
   
   
       10 . The temperature controlling system as claimed in  claim 8 , wherein the liquid flow system contains a liquid having high specific heat. 
   
   
       11 . The temperature controlling system as claimed in  claim 8 , wherein the heat transferring device is at least one fin. 
   
   
       12 . The temperature controlling system as claimed in  claim 8 , wherein the heat transferring device is at least one fan. 
   
   
       13 . The temperature controlling system as claimed in  claim 8 , wherein the heat generating device is a thermal electric (TE) device. 
   
   
       14 . The temperature controlling system as claimed in  claim 13 , wherein the thermal electric device is a TE heater. 
   
   
       15 . The temperature controlling system as claimed in  claim 8 , wherein the heat generating device is a heating device. 
   
   
       16 . A projection apparatus comprising the temperature controlling system as claimed in  claim 1 . 
   
   
       17 . The projection apparatus as claimed in  claim 16 , wherein the liquid flow system is substantially connected with the at least one heat generating element. 
   
   
       18 . The projection apparatus as claimed in  claim 16 , wherein the heat transferring device is at least one fin. 
   
   
       19 . The projection apparatus as claimed in  claim 16 , wherein the heat transferring device is at least one fan. 
   
   
       20 . The projection apparatus as claimed in  claim 16 , wherein the heat generating device is a thermal electric (TE) device.