Light emitting assembly, backlight module and liquid crystal display apparatus

Abstract

A light emitting assembly, a backlight module having the light emitting assembly, and a liquid crystal display (LCD) apparatus having the backlight module are provided. The light emitting assembly includes a rigid circuit board, a plurality of light emitting diode (LED) devices, and a flexible circuit board. The rigid circuit board has a plurality of external circuits isolated from one another. The LED devices are disposed on the rigid circuit board, and each of the external circuits is connected to a corresponding one of the LED devices. The flexible circuit board has a plurality of connecting lines, and each of the connecting lines is connected to at least two of the external circuits, so as to serially connect the LED devices that are connected to the external circuits.

What is claimed is: 
     
         1 . A light emitting assembly comprising:
 a rigid circuit board having a plurality of external circuits isolated from one another;   a plurality of light emitting diode devices disposed on the rigid circuit board, each of the external circuits being connected to a corresponding one of the light emitting diode devices; and   a flexible circuit board having a plurality of connecting lines, each of the connecting lines being connected to at least two of the external circuits, so as to serially connect the light emitting diode devices that are connected to the at least two of the external circuits.   
     
     
         2 . The light emitting assembly as claimed in  claim 1 , wherein the rigid circuit board has a plurality of groups of contacts corresponding to the light emitting diode devices, the groups of contacts are electrically connected to the connecting lines of the flexible circuit board, respectively, and each of the external circuits is connected to a corresponding one group of the contacts and a corresponding one of the light emitting diode devices. 
     
     
         3 . The light emitting assembly as claimed in  claim 2 , wherein the groups of contacts and the light emitting diode devices are located at a same side of the rigid circuit board, and the groups of contacts correspond to the light emitting diode devices and are arranged along a length direction of the rigid circuit board. 
     
     
         4 . The light emitting assembly as claimed in  claim 2 , wherein the groups of contacts and the light emitting diode devices are located at two respective sides of the rigid circuit board. 
     
     
         5 . The light emitting assembly as claimed in  claim 2 , further comprising a solder, the flexible circuit board, through the solder, being bonded onto the groups of contacts of the rigid circuit board, such that each of the connecting lines is electrically connected to a corresponding one of the external circuits. 
     
     
         6 . A backlight module comprising:
 a light guide plate;   a holder supporting the light guide plate and having a light source accommodation portion located at a side of the light guide plate, a light source accommodation space being within the light source accommodation portion; and   a light emitting assembly disposed within the light source accommodation space and comprising:
 a rigid circuit board having a plurality of external circuits isolated from one another; 
 a plurality of light emitting diode devices disposed on the rigid circuit board, each of the external circuits being connected to a corresponding one of the light emitting diode devices; and 
 a flexible circuit board having a plurality of connecting lines, each of the connecting lines being connected to at least two of the external circuits, so as to serially connect the light emitting diode devices that are connected to the at least two of the external circuits. 
   
     
     
         7 . The backlight module as claimed in  claim 6 , wherein the holder comprises:
 a bottom plate;   a side wall erected at a side of the bottom plate, the rigid circuit board being disposed on the side wall;   a top plate connected to a side of the side wall, the top plate being opposite to the bottom plate;   a wall structure extending from the top plate to the bottom plate, the wall structure being opposite to the side wall, and the side wall, the top plate, the wall structure, and the bottom plate together constituting the light source accommodation portion; and   a pressing plate extending from the wall structure to a direction away from the side wall, the pressing plate being opposite to the bottom plate, the light guide plate being sandwiched between the pressing plate and the bottom plate.   
     
     
         8 . The backlight module as claimed in  claim 7 , wherein the rigid circuit board has a plurality of groups of contacts corresponding to the light emitting diode devices, the groups of contacts are electrically connected to the connecting lines of the flexible circuit board, respectively, and each of the external circuits is connected to a corresponding one group of the contacts and a corresponding one of the light emitting diode devices. 
     
     
         9 . The backlight module as claimed in  claim 8 , wherein the groups of contacts and the light emitting diode devices are located at a same side of the rigid circuit board, and the groups of contacts correspond to the light emitting diode devices and are arranged along a length direction of the rigid circuit board. 
     
     
         10 . The backlight module as claimed in  claim 9 , the flexible circuit board comprising:
 a plurality of bonding portions respectively bonded onto the groups of contacts of the rigid circuit board; and   a connecting portion arranged along a long side of the rigid circuit board to connect the bonding portions, the connecting portion extending along the top plate toward a direction away from the side wall.   
     
     
         11 . The backlight module as claimed in  claim 10 , the light emitting assembly further comprising a solder, the bonding portions, through the solder, being respectively bonded onto the groups of contacts of the rigid circuit board. 
     
     
         12 . The backlight module as claimed in  claim 8 , wherein the groups of contacts and the light emitting diode devices are located at two respective sides of the rigid circuit board. 
     
     
         13 . The backlight module as claimed in  claim 12 , the flexible circuit board comprising:
 a bonding portion bonded onto the groups of contacts of the rigid circuit board, the bonding portion being located between the side wall and the rigid circuit board; and   a connecting portion arranged along a long side of the rigid circuit board and connected to the bonding portions, the connecting portion extending along the top plate toward a direction away from the side wall.   
     
     
         14 . The backlight module as claimed in  claim 13 , the light emitting assembly further comprising a solder, the bonding portion, through the solder, being bonded onto the groups of contacts of the rigid circuit board. 
     
     
         15 . A liquid crystal display apparatus comprising:
 a backlight module comprising:
 a light guide plate; 
 a holder supporting the light guide plate and having a light source accommodation portion located at a side of the light guide plate, a light source accommodation space being within the light source accommodation portion; and 
 a light emitting assembly disposed within the light source accommodation space and comprising:
 a rigid circuit board having a plurality of external circuits isolated from one another; 
 a plurality of light emitting diode devices disposed on the rigid circuit board, each of the external circuits being connected to a corresponding one of the light emitting diode devices; and 
 a flexible circuit board having a plurality of connecting lines, each of the connecting lines being connected to at least two of the external circuits, so as to serially connect the light emitting diode devices that are connected to the at least two of the external circuits; 
 
   a supporting frame disposed on the holder;   a liquid crystal display panel disposed on the supporting frame; and   a control circuit board disposed at a side of the backlight module and electrically connected to the liquid crystal display panel.   
     
     
         16 . The liquid crystal display apparatus as claimed in  claim 15 , wherein the flexible circuit board has a first joint element for connecting a second joint element on the control circuit board, such that the light emitting diode devices are electrically connected to the control circuit board.