Keypad having three-dimensional patterns

Abstract

A keypad having three-dimensional patterns includes a base layer, a light-guiding plate, a pattern layer, a shielding layer and a keycap layer. The light-guiding plate is overlapped on the base layer. The pattern layer is provided on the light-guiding plate. A plurality of three-dimensional patterns is provided on the front surface of the pattern layer. The shielding layer is coated on the back surface of the pattern layer, and is formed with a plurality of hollowed regions to correspond to the three-dimensional patterns. The keycap layer is overlapped on the pattern layer and formed with a plurality of keycaps to correspond to the three-dimensional patterns.

1 . A keypad having three-dimensional patterns, comprising:
 a base layer;   a light-guiding plate overlapped on the base layer;   a pattern layer provided on the light-guiding plate, a plurality of three-dimensional patterns being provided on a front surface of the pattern layer;   a shielding layer coated on a back surface of the pattern layer and formed with a plurality of hollowed regions to correspond to the three-dimensional patterns; and   a keycap layer overlapped on the pattern layer, the keycap layer being formed with a plurality of keycaps to correspond to the three-dimensional patterns.   
     
     
         2 . The keypad having three-dimensional patterns according to  claim 1 , wherein the pattern layer is a light-transmitting body or a translucent body. 
     
     
         3 . The keypad having three-dimensional patterns according to  claim 1 , wherein the three-dimensional pattern is any one of characters, symbols, icons or the combination thereof. 
     
     
         4 . The keypad having three-dimensional patterns according to  claim 1 , wherein the front surface of the pattern layer is a rough surface. 
     
     
         5 . The keypad having three-dimensional patterns according to  claim 1 , wherein the light-guiding plate is formed with a plurality of light-guiding microstructures to correspond to the undersides of the keycaps and the three-dimensional patterns. 
     
     
         6 . The keypad having three-dimensional patterns according to  claim 1 , wherein one side of the light-guiding plate is provided with a notch, and an inner surface of the notch is formed with a tooth-like stripe. 
     
     
         7 . The keypad having three-dimensional patterns according to  claim 1 , further comprising a shaping layer located between the pattern layer and the light-guiding plate. 
     
     
         8 . The keypad having three-dimensional patterns according to  claim 7 , further comprising a binding layer located between the light-guiding plate and the shaping layer. 
     
     
         9 . The keypad having three-dimensional patterns according to  claim 1 , wherein a plurality of bumps are formed on one surface of the base layer away from the light-guiding plate to correspond to the keycaps.