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History[ edit ] Rubber chiclet calculator keyboard The term first appeared during the home computer era of the late s to mids. This style of keyboard was met with poor reception.
Sony was the first modern laptop manufacturer to make use of this keyboard style with the release of the VAIO X in Keyboard technology The underlying technology used by such keyboards varies considerably. In some cases the keys themselves are integral to the backing membrane and deform when pressed to complete an electrical contact, while in other cases the keys have individual low-travel scissor switches.
Stylised cross-section of a "rubber" Chiclet keyboard. Under the left key is air space light greyjust below the upper red conductive layer. The thickness of the bottom three layers is exaggerated for clarity; in real-life they are not much thicker than paper.
Note the distortion of the thin rubber where the right-hand key pressed joins the sheet.
Some designs Apple inc evaluation and control the top membrane green and hole black layers, instead coating the undersides of the keys themselves with conductive material red.
In some versions of the chiclet keyboard, the bottom three layers are essentially the same as those in the membrane keyboard. In both cases, a keypress is registered when the top layer is forced through a hole to touch the bottom layer.
For every key, the conductive traces on the bottom layer are normally separated by a non-conductive gap.
Electric current cannot flow between them; the switch is open. When pushed down, conductive material on the underside of the top layer bridges the gap between those traces; the switch is closed, current can flow, and a keypress is registered. Unlike the membrane keyboard, where the user presses directly onto the top membrane layer, this form of chiclet keyboard places a set of moulded rubber keys above this.
With some key designs, the user pushes the key, and under sufficient pressure the thin sides of the rubber key suddenly collapse. In other designs — such as that seen in the diagram — the deliberate weak point is where the key joins the rest of the sheet. The effect is similar in both cases.
This collapse allows the solid rubber center to move downwards, forcing the top membrane layer against the bottom layer, and completing the circuit.
The "sudden collapse" of the chiclet keyboard along with the movement of the key provides a greater tactile feedback to the user than a simple flat membrane keyboard. Simplified design[ edit ] Keyboard from a remote control. When the key is pushed down, the conductive material on its underside touches the pair of fork-shaped traces below, bridging the gap between them and closing the circuit.
The fork-shaped traces are very-dark grey, and can be hard to see. The prominent white borders surround interconnecting traces.
When the key is pushed, the conductive underside makes contact with the traces on the bottom layer, and bridges the gap between them, thus completing the circuit.Apple, Inc. (NASDAQ:AAPL) Q2 Earnings Call May 1, PM ET Executives. Nancy Paxton - Apple, Inc. Timothy Donald Cook - Apple, Inc.
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