Display device

Abstract

Provided is a display device. The display device includes a circuit substrate, a light source electrically connected to the circuit substrate, the light source being disposed under the circuit substrate, and a light conversion member disposed on a light emitting surface of the light source and a side of the circuit substrate, the light conversion member converting a wavelength of light emitted from the light source. Here, the light conversion member is disposed also on a side surface of the circuit substrate and converts a wavelength of light emitted from the light source. Since the light conversion member is disposed on the side surface of the circuit substrate, the light conversion member may be aligned with the light source without interfering with the circuit substrate. Thus, the display device may effectively convert the wavelength of the light emitted from the light source to realize improved brightness and color impression.

What is claimed is: 
     
       1. A display device comprising:
 a circuit substrate;   a plurality of light sources electrically connected to the circuit substrate;   a light conversion member disposed on light emitting surfaces of the light sources and a side of the circuit substrate and separated from the light sources, the light conversion member converting a wavelength of lights emitted from the light sources;   a light guide plate disposed at a front side of the light conversion member;   a first adhesion layer in direct physical contact with the light conversion member and the light guide plate; and   a second adhesion layer in direct physical contact with the light sources and the light conversion member,   wherein the first adhesion layer and the second adhesion layer each has a refractive index of from about 1.1 to about 1.6.   
     
     
       2. The display device of  claim 1 , wherein the light conversion member comprises:
 a host;   a plurality of light conversion particles dispersed in the host;   a tube surrounding the host and formed of transparent material; and   a sealing member disposed on an inlet portion of the tube and separated from the host, and   wherein a center of each of the light emitting surfaces corresponds to a center of the host.   
     
     
       3. The display device of  claim 1 , wherein the light conversion member has a bar shape having a predetermined thickness and expanded in a length direction. 
     
     
       4. The display device of  claim 2 , wherein the light sources are disposed between a top surface and a bottom surface of the host, and
 wherein the light emitting surfaces of the light sources correspond to the host.   
     
     
       5. The display device of  claim 1 , wherein a side surface of the circuit substrate faces the side surface of the light conversion member. 
     
     
       6. The display device of  claim 5 ,
 wherein the side surface of the circuit substrate is in direct physical contact with the second adhesion layer.   
     
     
       7. The display device of  claim 1 , wherein the circuit substrate comprises:
 a first interconnection layer comprising a connection pad; and   a second interconnection layer disposed on the first interconnection layer,   wherein the light sources are electrically connected to the connection pad, and   the second interconnection layer comprises a connection wire connected to the connection pad.   
     
     
       8. The display device of  claim 7 , wherein the circuit substrate further comprises:
 an insulation layer disposed between the first interconnection layer and the second interconnection layer; and   a via passing through the insulation layer, the via being connected to the connection pad and the connection wire.   
     
     
       9. A display device comprising:
 a plurality of light sources;   a light conversion member disposed on a light emitting surface of each of the light sources and separated from the light sources, the light conversion member converting a wavelength of light emitted from the light sources;   a light guide plate disposed at a front side of the light conversion member;   a first adhesion layer in direct physical contact with the light conversion member and the light guide plate; and   a second adhesion layer in direct physical contact with the light sources and the light conversion member,   wherein the first adhesion layer and the second adhesion layer each has a refractive index of from about 1.1 to about 1.6.   
     
     
       10. The display device of  claim 9 , wherein the light conversion member comprises:
 the host;   a plurality of light conversion particles dispersed in the host;   a tube surrounding the host and formed of transparent material; and   a sealing member disposed on an inlet portion of the tube and separated from the host, and   wherein a center of each of the light sources corresponds to a center of the host.   
     
     
       11. The display device of  claim 10 , wherein each of the light sources has a height equal to or lower than a height of the host. 
     
     
       12. The display device of  claim 9 , wherein each of the light sources emits blue light, and
 the light conversion member converts the blue light into green light or red light.   
     
     
       13. The display device of  claim 9 , wherein each of the light sources has a height of about 500 μm to about 700 μm, and
 the host has a height of about 500 μm to about 700 μm. 
 
     
     
       14. A display device comprising:
 a light guide plate;   a display panel disposed on the light guide plate;   a plurality of light sources disposed on a side surface of the light guide plate;   a light conversion member disposed between the light sources and the light guide plate and separated from the light sources;   a first adhesion layer in direct physical contact with the light conversion member and the light guide plate;   a second adhesion layer in direct physical contact with the light sources and the light conversion member; and   a circuit substrate electrically connected to the light sources,   wherein the first adhesion layer and the second adhesion layer each has a refractive index of from about 1.1 to about 1.6.   
     
     
       15. The display device of  claim 14 , wherein the circuit substrate comprises:
 a first interconnection layer comprising a connection pad; and   a second interconnection layer disposed on the first interconnection layer,   wherein the light sources are electrically connected to the connection pad, and   the second interconnection layer comprises a connection wire connected to the connection pad.   
     
     
       16. The display device of  claim 14 , wherein the light conversion member comprises:
 a host;   a plurality of light conversion particles dispersed in the host;   a tube surrounding the host and formed of transparent material; and   a sealing member disposed on an inlet portion of the tube and separated from the host, and   wherein the light sources are disposed between a top surface and a bottom surface of the host.   
     
     
       17. The display device of  claim 14 , further comprising a reflective layer disposed on the light conversion member and the light guide plate. 
     
     
       18. The display device of  claim 17 , wherein the light conversion member is disposed on the reflective layer. 
     
     
       19. The display device of  claim 14 , further comprising a reflective layer extending in a direction equal to that of the light conversion member, the reflective layer being disposed on the light guide plate. 
     
     
       20. The display device of  claim 14 , wherein a top surface of each of the light sources is disposed at a position lower than that of the light conversion member, and
 a bottom surface of each of the light sources is disposed at a position higher than that of the light conversion member.   
     
     
       21. A backlight assembly comprising:
 a reflective sheet;   a light guide plate on the reflective sheet;   an optical sheet on the light guide plate;   a light source disposed at an incident surface of the light guide plate; and   a light conversion member between the light source and the light guide plate;   wherein the light conversion member comprises:
 a tube; 
 a host in the tube; 
 an air layer in the tube; and 
 a plurality of quantum dots in the host, 
   wherein the tube comprises:
 a light incident part; 
 a light exit part opposite to the light incident part; 
 a first distal end; 
 a second distal end opposite to the first distal end; 
 a first tube portion; 
 a second tube portion adjacent to the first tube portion; and 
 a midpoint between the distal end and the second distal end along a first direction that is parallel to a central longitudinal axis of the tube, 
   wherein the first tube portion extends from the first distal end to the midpoint and comprises the air layer and a portion of the host,   wherein the second tube portion extends from the midpoint to the second distal end and comprises a portion of the host,   wherein a length of the portion of the host of the first tube portion, taken in the first direction, is less than a length of the portion of the host of the second tube portion, taken in the first direction,   wherein the tube extends along the incident surface of the light guide plate, and   wherein the backlight unit comprises at least one of the following:
 a first adhesion layer disposed on the light exit part, the first adhesion layer having a refractive index of 1.1 to 1.6; and 
 a second adhesion layer disposed on the incident part, the second adhesion layer having a refractive index of 1.1 to 1.6. 
   
     
     
       22. The backlight assembly of claim 21, wherein the tube includes glass. 
     
     
       23. The backlight assembly of claim 21, wherein the air layer includes nitrogen. 
     
     
       24. The backlight assembly of claim 21, wherein the mass of the portion of the host of the first tube portion is smaller than the mass of the portion of the host of the second tube portion. 
     
     
       25. The backlight assembly of claim 21, wherein the first tube portion comprises a first sealing portion and the second tube portion comprises a second sealing portion. 
     
     
       26. The backlight assembly of claim 25, wherein the first sealing portion seals the first tube portion and comprises a material different from the tube. 
     
     
       27. The backlight assembly of claim 21, wherein the air layer is in direct contact with the host in the first tube portion. 
     
     
       28. The backlight assembly of claim 27, wherein at least a portion of a surface of the host in contact with the air layer is curved. 
     
     
       29. A display device comprising:
 a frame;   a backlight assembly on the frame; and   a liquid crystal panel on the backlight assembly;   wherein the backlight assembly comprises:
 a reflective sheet; 
 a light guide plate on the reflective sheet; 
 an optical sheet on the light guide plate; 
 a light source disposed at an incident surface of the light guide plate; and 
 a light conversion member between the light source and the light guide plate; 
   wherein the light conversion member comprises:
 a tube; 
 a host in the tube; 
 an air layer in the tube; and 
 a plurality of quantum dots in the host, 
   wherein the tube comprises:
 a light incident part; 
 a light exit part opposite to the light incident part; 
 a first distal end; 
 a second distal end opposite to the first distal end; 
 a first tube portion; 
 a second tube portion adjacent to the first tube portion; and 
 a midpoint between the distal end and the second distal end along a first direction that is parallel to a central longitudinal axis of the tube, 
   wherein the first tube portion extends from the first distal end to the midpoint and comprises the air layer and a portion of the host,   wherein the second tube portion extends from the midpoint to the second distal end and comprises a portion of the host,   wherein a length of the portion of the host of the first tube portion, taken in the first direction, is less than a length of the portion of the host of the second tube portion, taken in the first direction,   wherein the tube extends along the incident surface of the light guide plate, and   wherein the backlight unit comprises at least one of the following:
 a first adhesion layer disposed on the light exit part, the first adhesion layer having a refractive index of 1.1 to 1.6; and 
 a second adhesion layer disposed on the incident part, the second adhesion layer having a refractive index of 1.1 to 1.6. 
   
     
     
       30. The display device of claim 29, wherein the tube comprises:
 a top part extending from the light incident part to the light exit part; and   a bottom part extending from the light incident part to the light exit part and opposite to the top part.   
     
     
       31. The display device of claim 30, the backlight unit comprising the first adhesion layer disposed on the light exit part. 
     
     
       32. The display device of claim 30, the backlight unit comprising the second adhesion layer disposed on the incident part. 
     
     
       33. The display device of claim 32, comprising a printed circuit board (PCB) on which the light source is disposed, wherein the second adhesion layer is disposed between the light conversion member and the PCB. 
     
     
       34. The display device of claim 29, wherein the tube includes glass. 
     
     
       35. The display device of claim 29, wherein the air layer includes nitrogen. 
     
     
       36. The display device of claim 29, wherein the mass of the portion of the host of the first tube portion is smaller than the mass of the portion of the host of the second tube portion. 
     
     
       37. The display device of claim 29, wherein the first tube portion comprises a first sealing portion and the second tube portion comprises a second sealing portion. 
     
     
       38. The display device of claim 37, wherein the first sealing portion seals the first tube portion and comprises a material different from the tube. 
     
     
       39. The display device of claim 29, wherein the air layer is in direct contact with the host in the first tube portion. 
     
     
       40. The display device of claim 39, wherein at least a portion of a surface of the host in contact with the air layer is curved.