KEY INPUT DEVICE

摘要

PURPOSE: A key input device is provided to be applicable to a display module by using a transparent policy-dome sheet on which conductive polymer is coated. CONSTITUTION: A transparent electric circuit is formed on an upper surface of a transparent insulation substrate. Transparent dome switches(510) are insulated and an elastic body and are laminated on the upper surface of the transparent electric circuit. The transparent conductive is formed on the transparent dome switches. A display module(100) is attached to the lower portion of the transparent insulation substrate.