Lateral electric-field liquid crystal display device suitable for improvement of aperture ratio

Abstract

A liquid crystal display device includes a backlight case, a light guide disposed in the backlight case, a light source disposed in the backlight case and arranged at one side of the light guide, and a liquid crystal panel formed over the backlight case. An outer edge of the backlight case is straight in plane view at one side which extends in a direction perpendicular to an elongated direction of the light source, and a width of a top surface of the backlight case at the one side is wider at a position adjacent to the light guide than a width thereof at a position adjacent to the light source arranged.

1 . A liquid crystal display device comprising: 
 a backlight case;    a light guide being disposed in the backlight case;    a light source being disposed in the backlight case and arranged at one side of the light guide; and    a liquid crystal panel formed over the backlight case;    wherein an outer edge of the backlight case is straight in plane view at one side which extends in a direction which is perpendicular to an elongated direction of the light source; and    wherein a width of a top surface of the backlight case at the one side is wider at a position adjacent to the light guide than a width thereof at a position adjacent to the light source.    
   
   
       2 . A liquid crystal display device according to  claim 1 , wherein a width of an opening of the backlight case where the light guide is disposed is narrower than a width thereof where the light source is disposed.  
   
   
       3 . A liquid crystal display device comprising: 
 a backlight case;    a light guide being disposed in the backlight case;    a light source being disposed in the backlight case at one side of the light guide; and    a liquid crystal panel formed over the backlight case;    wherein an outer edge of the backlight case in plane view has a first side which extends in a direction which is perpendicular to an elongated direction of the light source, and a second side which extends in a direction which is parallel to the elongated direction of the light source and which is adjacent to the light source; and    wherein a width of a top surface of the backlight case at the first side is wider at a position adjacent to the light guide than a width thereof at a position adjacent to the light source, and a width of the backlight case at the second side is wider than a width of the first side at a region adjacent to the light source.    
   
   
       4 . A liquid crystal display device according to  claim 3 , wherein a width of an opening of the backlight case where the light source guide is disposed is narrower than a width thereof where the light source is disposed.  
   
   
       5 . A liquid crystal display device according to  claim 4 , wherein the first side is straight in plane view.  
   
   
       6 . A liquid crystal display device according to  claim 3 , wherein the outer edge of the backlight case in plane view has a third side which extends in a direction which is parallel to the elongated direction of the light source and is at a position which is far from the light source, the width of the top surface of the second side being wider than a width of a top surface of the third side.  
   
   
       7 . A liquid crystal display device according to  claim 4 , wherein the outer edge of the backlight case in plane view has a third side which extends in a direction which is parallel to the elongated direction of the light source and is at a position which is far from the light source, the width of the top surface of the second side being wider than a width of a top surface of the third side.  
   
   
       8 . A liquid crystal display device according to  claim 5 , wherein the outer edge of the backlight case in plane view has a third side which extends in a direction which is parallel to the elongated direction of the light source and is at a position which is far from the light source, the width of the top surface of the second side being wider than a width of a top surface of the third side.  
   
   
       9 . A liquid crystal display device comprising: 
 a backlight case;    a light guide being disposed in the backlight case;    a light source being disposed in the backlight case and arranged at one side of the light guide; and    a liquid crystal panel formed over the backlight case;    wherein an outer edge of the backlight case is straight in plane view at a side which extends in a direction which is perpendicular to an elongated direction of the light source; and    wherein a width of the backlight case at the one side is wider at a position adjacent to the light guide than a width thereof at a position adjacent to the light source.    
   
   
       10 . A liquid crystal display device according to  claim 9 , wherein a width of an opening of the backlight case where the light guide is disposed is narrower than a width thereof where the light source is disposed.  
   
   
       11 . A liquid crystal display device comprising: 
 a backlight case;    a light guide being disposed in the backlight case;    a light source in the backlight case being disposed at one side of the light guide; and    a liquid crystal panel formed over the backlight case;    wherein an outer edge of the backlight case in the plane view has a first side which extends in a direction which is perpendicular to an elongated direction of the light source, and a second side which extends in a direction which is parallel to elongated direction of the light source and which is adjacent to the light source; and    wherein a width of the backlight case at the first side is wider at a position adjacent to the light guide than a width thereof at a position adjacent to the light source, and a width of the backlight case at the second side is wider than a width of the first side at a region adjacent to the light source.    
   
   
       12 . A liquid crystal display device according to  claim 11 , wherein a width of an opening of the backlight case where the light is disposed is narrower than a width thereof where the light source is disposed.  
   
   
       13 . A liquid crystal display device according to  claim 12 , wherein the first side is straight in plane view.  
   
   
       14 . A liquid crystal display device according to  claim 11 , wherein the outer edge of the backlight case in plane view has a third side which extends in a direction which is parallel to the elongated direction of the light source and is at a position which is far from the light source, the width of the top surface of the second side being wider than a width of a top surface of the third side.  
   
   
       15 . A liquid crystal display device according to  claim 12 , wherein the outer edge of the backlight case in plane view has a third side which extends in a direction which is parallel to the elongated direction of the light source and is at a position which is far from the light source, the width of the top surface of the second side being wider than a width of a top surface of the third side.  
   
   
       16 . A liquid crystal display device according to  claim 13 , wherein the outer edge of the backlight case in plane view has a third side which extends in a direction which is parallel to the elongated direction of the light source and is at a position which is far from the light source, the width of the top surface of the second side being wider than a width of a top surface of the third side.  
   
   
       17 . A liquid crystal display device according to  claim 11 , wherein the outer edge of the backlight case in plane view has a third side which extends in a direction which is parallel to the elongated direction of the light source and is at a position far from the light source, and the width of the second side is wider than a width of the third side.  
   
   
       18 . A liquid crystal display device according to  claim 12 , wherein the outer edge of the backlight case in plane view has a third side which extends in a direction which is parallel to the elongated direction of the light source and is at a position far from the light source, and the width of the second side is wider than a width of the third side.  
   
   
       19 . A liquid crystal display device according to  claim 13 , wherein the outer edge of the backlight case in plane view has a third side which extends in a direction which is parallel to the elongated direction of the light source and is at a position far from the light source, and the width of the second side is wider than a width of the third side.