A keyboard including a backlight module, a base plate disposed on the backlight module, a membrane circuit disposed on the base plate, and a plurality of keycaps disposed on the membrane circuit is provided. The backlight module includes a light source and a reflective layer. The light source and a corresponding circuitry are arranged on the reflective layer, and a circuitry connecting portion extends from the reflective layer. The base plate has a positioning portion with an aperture, and a portion of the reflective layer contacts the base plate or the positioning portion.

A key stabilizer is provided, in which the key stabilizer includes a keycap and a balance bar. The keycap has a bottom surface and two protruding portions disposed thereon. The keycap moves back and forth along a vertical direction between a top position and a bottom position. Each of the two protruding portions has an engaging portion at the end thereof. The bottom surface faces the bottom position, and the two protruding portions are arranged along a horizontal direction that is perpendicular to the vertical direction. The balance bar has a hinge portion and two side portions respectively connected to both ends of the hinge portion. The hinge portion is positioned on a rotation axis parallel to the horizontal direction. The end of each of the two side portions that is away from the hinge portion is inserted into the engaging portion.

A key stabilizer is provided, in which the key stabilizer includes a keycap and a balance bar. The keycap has a bottom surface and two protruding portions disposed thereon. The keycap moves back and forth along a vertical direction between a top position and a bottom position. Each of the two protruding portions has an engaging portion at the end thereof. The bottom surface faces the bottom position, and the two protruding portions are arranged along a horizontal direction that is perpendicular to the vertical direction. The balance bar has a hinge portion and two side portions respectively connected to both ends of the hinge portion. The hinge portion is positioned on a rotation axis parallel to the horizontal direction. The end of each of the two side portions that is away from the hinge portion is inserted into the engaging portion.

A keyboard structure includes an elastomer, a flexible conductor and a conductive circuit board from top to bottom. The conductive circuit board is respectively provided with a circuit anode and a circuit cathode, the flexible conductor includes a flexible body and a conductive layer arranged on the flexible body. When pressing the elastomer, the circuit is switched on if the conductive layer on the flexible conductor is in contact with the circuit anode and the circuit cathode on the conductive circuit board. When loosening the elastomer, the circuit is switched off if the conductive layer on the flexible conductor is separated from the circuit anode and the circuit cathode on the conductive circuit board.

A keyboard structure includes an elastomer, a flexible conductor and a conductive circuit board from top to bottom. The conductive circuit board is respectively provided with a circuit anode and a circuit cathode, the flexible conductor includes a flexible body and a conductive layer arranged on the flexible body. When pressing the elastomer, the circuit is switched on if the conductive layer on the flexible conductor is in contact with the circuit anode and the circuit cathode on the conductive circuit board. When loosening the elastomer, the circuit is switched off if the conductive layer on the flexible conductor is separated from the circuit anode and the circuit cathode on the conductive circuit board.

The present invention discloses a keyboard based on key position layout and an input method thereof applied to an electronic device. The keyboard includes a keyboard body. The keyboard body is provided with a main key area formed by 25 keys, and 28 letter key positions are arranged in the main key area and are configured to display 28 input method letters. The input method letters are Chinese phonetic letters, calligraphical code letters or English Latin letters. On virtual keys of a virtual keyboard, dynamic substitution between input method letters in letter key positions is performed to display a currently used input method.

The present invention discloses a keyboard based on key position layout and an input method thereof applied to an electronic device. The keyboard includes a keyboard body. The keyboard body is provided with a main key area formed by 25 keys, and 28 letter key positions are arranged in the main key area and are configured to display 28 input method letters. The input method letters are Chinese phonetic letters, calligraphical code letters or English Latin letters. On virtual keys of a virtual keyboard, dynamic substitution between input method letters in letter key positions is performed to display a currently used input method.

The present invention provides a key structure with electrostatic discharge protection, including a key cap; a metal support panel; a support element, connecting the key cap and the metal support panel and capable of guiding the key cap to move up and down relative to the metal support panel; and a membrane circuit board, disposed on the metal support panel. The membrane circuit board includes: a first membrane layer, having a first surface and a second surface; a second membrane layer, having a third surface and a fourth surface; and an electrostatic protection structure, including: a first conductive layer, formed on a first surface of the first membrane layer; a second conductive layer, formed between the second surface of the first membrane layer and the third surface of the second membrane layer; and a third conductive layer, formed on the fourth surface of the second membrane layer.

The present invention provides a key structure with electrostatic discharge protection, including a key cap; a metal support panel; a support element, connecting the key cap and the metal support panel and capable of guiding the key cap to move up and down relative to the metal support panel; and a membrane circuit board, disposed on the metal support panel. The membrane circuit board includes: a first membrane layer, having a first surface and a second surface; a second membrane layer, having a third surface and a fourth surface; and an electrostatic protection structure, including: a first conductive layer, formed on a first surface of the first membrane layer; a second conductive layer, formed between the second surface of the first membrane layer and the third surface of the second membrane layer; and a third conductive layer, formed on the fourth surface of the second membrane layer.

Embodiments describing a method of forming a multi-layered keycap structure are disclosed herein. The method includes forming a first polymer layer on a second polymer layer, wherein the first polymer layer includes a first color and the second polymer layer includes a second color, and coupling the first polymer layer and second polymer layer to a substrate layer such that the first polymer layer is closer to the substrate than the second polymer layer. The method may further include forming a third polymer layer on the second polymer layer; and etching the multi-layered keycap structure to form an opening having a bottom surface that exposes at least one of the first or second color.