Handheld electronic device with keypad assembly comprising receiving coil transforming electromagnetic waves into power

Abstract

A handheld electronic device includes a housing, a display screen and a keypad assembly. The keypad assembly includes a FPC board, a number of press keys and a light guiding module. The press keys are held on the FPC board. The light guiding module includes a light guiding plate and a light source. The light guiding plate is mounted on the press keys. The light source is coupled to the FPC board and provides input light for the light guiding plate. The keypad structure further includes a receiving coil and a shielding layer. The receiving coil surrounds a periphery of the press keys. The receiving coil transfers electromagnetic waves into power, and charges the handheld electronic device. The shielding layer is laid on and adhered to the press keys. The light guiding plate is laid on and adhered to the shielding layers.

What is claimed is:  
     
       1. A handheld electronic device comprising;
 a housing, a display screen mounted on the housing, and a keypad assembly received in the housing, wherein the keypad assembly comprises:
 a flexible printed circuit board; 
 a plurality of press keys located on the flexible printed circuit board; and 
 a light guiding module, wherein the light guiding module comprises a light guiding plate and a light source, the light guiding plate is adjacent to the housing and mounted to the plurality of press keys, the light source is electronically coupled to the flexible printed circuit board and provides input light for the light guiding plate; the keypad assembly further comprises: 
 a receiving coil located on the flexible printed circuit board; and surrounding a periphery of the plurality of the press keys and electronically connected to the flexible printed circuit hoard, wherein the receiving coil transforms electromagnetic waves into power, and charges the handheld. electronic device; and 
 a shielding layer laid on and adhered to the plurality of press keys to prevent interference between the receiving coil and the plurality of press keys, wherein the light guiding plate is laid on and adhered to the shielding layers. 
 
 
     
     
       2. The handheld electronic device as described in  claim 1 , wherein the receiving coil is electroplated or etched on the flexible printed circuit board. 
     
     
       3. The handheld electronic device as described in  claim 1 , wherein the shielding layer comprises a number of sections separated from each other, and when a press is applied on one section of the shielding layer Which is corresponding to one press key, the corresponding press key can be pressed with no influence to other press keys. 
     
     
       4. The handheld electronic device as described in  claim 3 , wherein the shielding layer is an integrated flexible plate, and each press key can be pressed individually with no influence to other press keys. 
     
     
       5. The handheld electronic device as described in  claim 1 , wherein the flexible printed circuit board comprises a conductive pin, and the conductive pin is coupled to the receiving coil and the press keys respectively. 
     
     
       6. The handheld electronic device as described by  claim 5 , wherein the shielding layer is laid on and adhere to the plurality of press keys. 
     
     
       7. The handheld electronic device as described in  claim 6 , wherein the light guiding plate is laid on and adhered to the shielding layer, and the light source is located on one side of the light guiding plate. 
     
     
       8. The handheld electronic device as described in  claim 7 , wherein the light source comprises a support and an LED light fixed on the support, the support is located on one side of flexible primed circuit board, and the LED light is located on one end of the support away from the flexible printed circuit board and adjacent to the light guiding plate. 
     
     
       9. The handheld electronic device as described by  claim 5 , wherein the keypad assembly thither comprises a basement layer, the basement layer is made of insulating material, and laid on and adhered on a surface of the flexible printed circuit board away from the plurality of press keys.