Liquid crystal display device

Abstract

A liquid crystal display device includes a panel, a heater, and a temperature detector. The panel includes substrates electrodes and liquid crystal. The electrodes and the liquid crystal are disposed between the substrates. The heater has a transparent heating member, and the heating member emits heat by being supplied with electricity. At least a part of the heating member of the heater is located to overlap with a display area of the panel in a thickness direction of the substrates. A temperature detecting portion of the temperature detector and the heating member of the heater are located adjacent to each other.

1 . A liquid crystal display device comprising:
 a liquid crystal display panel including
 a first substrate and a second substrate opposing to the first substrate, 
 a plurality of electrodes disposed between the first substrate and the second substrate, and 
 liquid crystal sealed between the first substrate and the second substrate; 
   a heater having a transparent heating member disposed opposite to the electrodes through the first substrate, the heating member emitting heat by being supplied with electricity; and   a temperature detector having a temperature detecting portion, wherein   at least a part of the heating member is located to overlap with a display area of the liquid crystal display panel in a thickness direction of the substrates, and   the temperature detecting portion of the temperature detector and the heating member of the heater are located adjacent to each other.   
   
   
       2 . The liquid crystal display device according to  claim 1 , wherein
 the heater further has a supporting board for supporting the heating member, and   the temperature detector is disposed on the heating member through the supporting board.   
   
   
       3 . The liquid crystal display device according to  claim 2 , further including
 a compensating panel disposed adjacent to the first substrate of the liquid crystal display panel, wherein   the compensating panel has
 a third substrate opposing to the liquid crystal display panel, 
 a fourth substrate located opposite to the liquid crystal display panel through the third substrate, and 
 liquid crystal sealed between the third substrate and the fourth substrate, 
   the supporting board of the heater is the third substrate of the compensating panel.   
   
   
       4 . The liquid crystal display device according to  claim 1 , wherein
 the heating member is disposed on a face of the first substrate opposite from the electrodes, and   the temperature detector is disposed on the heating member opposite from the electrodes.   
   
   
       5 . The liquid crystal display device according to  claim 1 , wherein
 the heating member is further located outside of the display area of the liquid crystal display panel in the thickness direction of the substrates, and   the temperature detector is disposed adjacent to the heating member located outside of the display area.   
   
   
       6 . The liquid crystal display device according to  claim 1 , wherein
 the heating member covers at least entire face of the display area.   
   
   
       7 . The liquid crystal display device according to  claim 1 , wherein
 the heating member has a resistance adjusting portion for limiting current flowing through the heating member corresponding to the display area or current flowing adjacent to the temperature detector.   
   
   
       8 . The liquid crystal display device according to  claim 7 , wherein
 the resistance adjusting portion controls a resistance of the heating member by removing a part of the heating member.   
   
   
       9 . The liquid crystal display device according to  claim 7 , wherein
 the heating member is further located outside of the display area of the liquid crystal display panel in the thickness direction of the substrates, and   the resistance adjusting portion controls a resistance of the heating member by removing a part of the heating member located outside of the display area.   
   
   
       10 . The liquid crystal display device according to  claim 1 , further comprising
 a temperature fuse located adjacent to the heating member, wherein   the temperature fuse is connected to the heating member in series.   
   
   
       11 . The liquid crystal display device according to  claim 1 , wherein
 the temperature detector is a thermistor.