| 摘要 |
Disclosed are a membrane switch sheet which is used in a key input device of a switch matrix method by being manufactured at low manufacturing costs and a membrane switch keyboard including the same. The membrane switch sheet includes a lower sheet, a spacer sheet, and an upper sheet. The lower sheet includes: a lower base film; and a first conductive ink layer and a second conductive ink layer which are printed in one side of the lower base film in different directions. The spacer sheet is arranged on the lower sheet and has multiple spacer holes which are formed to respectively correspond to key button areas. The upper sheet is arranged on the spacer sheet and includes an upper base film and a ground layer which is printed on one side of the upper base film. An electric field which is formed between the first conductive ink layer and the second conductive ink layer is changed by coming close to the first and second conductive ink layers by bending the ground layer through a spacer hole as a key button area is pushed. |
