Video display device

Abstract

A video display device includes a laser beam source module including a laser beam source emitting a laser beam and a laser beam source drive unit supplying power to the laser beam source, and an image generation unit generating a desired display image from the laser beam. The laser beam source module includes a substrate having the placed laser beam source and improved thermal conductivity, a temperature measurement member measuring a temperature of the substrate, a temperature adjustment member contacting the substrate and adjusting the temperature of the substrate, a circuit substrate electrically connecting the temperature measurement member and the laser beam source. Moreover, the circuit substrate is disposed on a rear surface opposite to a placement surface on which the laser beam source is placed, the temperature measurement member is mounted on the circuit substrate, and a portion of the temperature measurement member is connected to the substrate.

What is claimed is: 
     
       1. A video display device allowing an observer to observe video of a display image, comprising:
 a laser beam source module including a laser beam source emitting a laser beam and a laser beam source drive unit that supplies power to the laser beam source; and 
 an image generation unit that generates a desired display image from the laser beam, 
 wherein the laser beam source module includes: 
 a substrate on which the laser beam source is placed and which has improved thermal conductivity; 
 a temperature measurement member that measures a temperature of the substrate; 
 a temperature adjustment member that contacts the substrate and adjusting the temperature of the substrate; and 
 a circuit substrate that electrically connects the temperature measurement member and the laser beam source, 
 wherein the circuit substrate is disposed on a rear surface opposite to a placement surface on which the laser beam source is placed, 
 wherein the temperature measurement member is mounted on the circuit substrate, and 
 wherein a portion of the temperature measurement member is connected to the substrate. 
 
     
     
       2. The video display device according to  claim 1 ,
 wherein one terminal portion of a terminal of the temperature measurement member is electrically connected to the circuit substrate, and 
 wherein at least a portion of the temperature measurement member other than the one terminal portion contacts the substrate, and the other terminal portion of the terminal of the temperature measurement member is electrically connected to the substrate to be grounded. 
 
     
     
       3. The video display device according to  claim 1 ,
 wherein the substrate and the circuit substrate comprises a metal substrate integrally formed of the substrate and the circuit substrate. 
 
     
     
       4. The video display device according to  claim 1 ,
 wherein the laser beam source module includes a thermal conduction member having improved thermal conductivity, and 
 wherein a portion of the temperature measurement member and the substrate are connected to each other via the thermal conduction member. 
 
     
     
       5. The video display device according to  claim 4 ,
 wherein the thermal conduction member comprises a solder member. 
 
     
     
       6. The video display device according to  claim 4 ,
 wherein the circuit substrate comprises a flexible printed circuit. 
 
     
     
       7. The video display device according to  claim 1 ,
 wherein the temperature measurement member comprises a chip type thermistor. 
 
     
     
       8. The video display device according to  claim 1 ,
 wherein the laser beam source module includes a heat dissipation member disposed to contact the temperature adjustment member.