A keyboard device with a display panel including a base, a scissors feet assembly movably disposed on the base, an elastic member disposed on the base, a display panel supported by the scissors feet assembly and the elastic member, and multiple light transmittance keycaps disposed on the display panel is provided. The display panel has multiple display surfaces, multiple hollow portions, and multiple elastic portions. Each of the display surfaces is surrounded by the hollow portions, and is suspended between the hollow portions by the elastic portions. The light transmittance keycaps respectively and correspondingly cover the display surfaces.

A keyboard device includes plural key structures, an electronic paper display element and an illumination module. The electronic paper display element is disposed under the plural key structures. The plural key symbols corresponding to the plural key structures are displayed on the electronic paper display element. The illumination module is disposed over the electronic paper display element to provide a light beam to the electronic paper display element. Consequently, the plural key symbols are illuminated.

A cap structure is combined with a lifting mechanism to be movable between a pressed position and a non-pressed position. The cap structure includes a first circuit, a second circuit, a flexible circuit board and a cap having a top surface, a bottom surface and an engaging structure. The engaging structure protrudes from the bottom surface for engaging with the lifting mechanism. The first circuit is laid out on the top surface for connecting to a sensing device or a display device attached on the top surface. The second circuit is laid out on the bottom surface and avoids the engaging structure. The second circuit passes through the cap to be connected to the first circuit. The flexible circuit board is connected to the second circuit for performing signal transmission of the sensing device or the display device via the first and second circuits.

A keyboard device includes plural key structures, an electronic paper display element and an illumination module. The electronic paper display element is disposed under the plural key structures. The plural key symbols corresponding to the plural key structures are displayed on the electronic paper display element. The illumination module is disposed over the electronic paper display element to provide a light beam to the electronic paper display element. Consequently, the plural key symbols are illuminated.

A three-dimensional circuit membrane includes a thermoplastic plastic sheet and a wiring. The thermoplastic plastic sheet has a surface and a thermoformed structure outwardly protruding from the surface. The wiring is printed on the surface and extends to the thermoformed structure. The thermoformed structure has a hollowed portion beside the wiring such that the thermoformed structure collapses easily when pressed. A key having the three-dimensional circuit membrane, a method for manufacturing the three-dimensional circuit membrane, and a method for manufacturing the key are further provided.

Particular embodiments described herein provide a keycap that includes a plurality of front plane elements, where each front plane element includes a top electrode, a conductive region under each of the plurality of front plane elements, where each conductive region includes a bottom electrode and a top electrode coupling area, where each top electrode coupling area is electrically coupled to a common top electrode node, an electrical path between each top electrode and each corresponding top electrode coupling area such that each top electrode is connected to the common top electrode node, and a dielectric between each top electrode and each bottom electrode.

A keyboard device with a display panel including a base, a scissors feet assembly movably disposed on the base, an elastic member disposed on the base, a display panel supported by the scissors feet assembly and the elastic member, and multiple light transmittance keycaps disposed on the display panel is provided. The display panel has multiple display surfaces, multiple hollow portions, and multiple elastic portions. Each of the display surfaces is surrounded by the hollow portions, and is suspended between the hollow portions by the elastic portions. The light transmittance keycaps respectively and correspondingly cover the display surfaces.

A keyboard device includes plural key structures, an electronic paper display element and an illumination module. The electronic paper display element is disposed under the plural key structures. The plural key symbols corresponding to the plural key structures are displayed on the electronic paper display element. The illumination module is disposed over the electronic paper display element to provide a light beam to the electronic paper display element. Consequently, the plural key symbols are illuminated.

A key includes a display, a connector, and a supporting structure. The display has a displaying surface and a connecting surface opposing the displaying surface. Electrodes are disposed on the connecting surface. The connector includes a connection dock and substantially bead-shaped conductors. The connection dock supports the display and has through holes. The conductors are substantially disposed in the through holes, respectively, and electrically connected to the electrodes, respectively. The support mechanism is engaged with the connection dock.

Particular embodiments described herein provide a keycap that includes a plurality of front plane elements, where each front plane element includes a top electrode, a conductive region under each of the plurality of front plane elements, where each conductive region includes a bottom electrode and a top electrode coupling area, where each top electrode coupling area is electrically coupled to a common top electrode node, an electrical path between each top electrode and each corresponding top electrode coupling area such that each top electrode is connected to the common top electrode node, and a dielectric between each top electrode and each bottom electrode.