Patent ID: 8513549

Claim:
An illuminated keyboard, comprising: a main circuit board; a membrane switch circuit module connected with said main circuit board, and comprising at least one key intersection, a first trace pattern and a bus bar, wherein when said at least one key intersection is triggered, a key signal is generated, wherein said first trace pattern is connected with said at least one key intersection and has a first connecting zone, wherein said bus bar is connected with said main circuit board and said first trace pattern, wherein said membrane switch circuit module further comprises: an upper wiring board having at least one upper contact, wherein said first trace pattern, said first connecting zone and said bus bar are disposed on said upper wiring board; a lower wiring board arranged at a side of said upper wiring board, and comprising at least one lower contact corresponding to said at least one upper contact and a third trace pattern, wherein said at least one upper contact and said at least one lower contact collectively define said at least one key intersection, wherein when said membrane switch circuit module is depressed, said upper contact and said lower contact are contacted with each other, so that said key signal is generated, wherein said third trace pattern further comprises a third connecting zone, and said third connecting zone and said first connecting zone are in contact with each other, so that a connection loop between said upper wiring board and said lower wiring board is established; and a partition plate arranged between said upper wiring board and said lower wiring board, and having at least one perforation corresponding to said at least one upper contact, wherein when said membrane switch circuit module is depressed, said at least one upper contact is inserted into said perforation; an illumination circuit board stacked on said membrane switch circuit module and comprising at least one light source and a second trace pattern, wherein said light source is disposed on a first surface of said illumination circuit board for emitting light beams, and said second trace pattern is disposed on said first surface of said illumination circuit board and connected with said light source, wherein said second trace pattern has a second connecting zone; and at least one key disposed over said membrane switch circuit module and aligned with said at least one key intersection, wherein when said at least one key is depressed, said membrane switch circuit module is triggered, wherein said first connecting zone and said second connecting zone are in contact with each other, so that electricity is transmitted to said illumination circuit board through said bus bar, said first trace pattern and said second trace pattern.