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Membrane switch
申请号	JP7885090	申请日	1990-03-29	公开(公告)号	JPH03283220A	公开(公告)日	1991-12-13
申请人	Alps Electric Co Ltd;			发明人	KOBAYASHI SHOICHI; SHIMOJO KAZUTOSHI;
摘要	PURPOSE: To obtain a transparent membrane switch with which production of interference fringes is prevented and with which bounce at the time of switching action is restricted by forming a number of fine irregularities at least in a surface of one glass substrate facing the other glass substrate, and forming electrodes in the irregular surface. CONSTITUTION: A membrane switch consists of a lower glass substrate having an upper surface of an irregular surface 3a where a number of fine irregularities are formed, with lower electrodes 4 patterned in the irregular surface 3a. Light from a light source is irregularly reflected at the irregular surface 3a of the lower glass substrate 3, so interference fringes are not generated, and a high grade membrane switch can be achieved. The lower electrodes 4 of a form shaped along the irregular surface 3a has fine protrusions 4a, and upper electrodes 2 are put to get in point contact with the fine protrusions 4a for changing into a switch-on condition, so bounce in a switching action can be restricted compared to a case where both electrodes get in surface contact with each other, thereby a membrane switch of a higher responsiveness can be obtained. COPYRIGHT: (C)1991,JPO&Japio
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