Shin-Etsu Polymer America, Inc.

Edge Sensor Type

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Q-Point:



		A new input device using conductive silicone rubber as a sensor. As other input devices do, Q-point read analog signal input by the silicone rubber sensor and convert into digital signal output by the processing circuit for device like I²C, PS/2 and USB.

How Q-point works:



		Based on Ohm's law: The current through a conductor between two points is directly proportional to the potential difference across the two points, and inversely proportional to the resistance between them.

Advantages:

	Low Cost			Superior functionality


The sensor consists of only conductive silicone rubber.			Though a very simple structure, various and combined motions possible; 360-degree motion, Force-sensitive motion, Scrolling with accelerator-like motion, 4-direction. Water-proof as a value added feature

	Space-saving			High durability

Min. 1mm thickness for the sensor portion in case of the Disk type. Min. 3.3 mm height for the Stick type.			Using a silicone rubber proven to be highly durable Wide operation temp. rage (from -40 °C to 85 °C)

	Low power consumption			Design flexibility



950 micro A ( where a general circuit is used and when a firm order is on) Possible to set a "sleep" mode as well for further saving.			By combining a keycap by plastic, various design is achievable.

Product Descriptions:

		Available in different stick heights to meet your control preference.
		Make possible for X-Y coordinate controls by utilizing Q-Point Stick Type
		Simple structure and, thus, highly cost-competitive, durable, low-profile. Slim design available.
		Scroll + 360-degree Control + Side Edge Control + 5-Way Click possible. Can be placed at the edge, so can save space for maximize display.

…includes actual demonstration video clip

Capacitive Sensor vs. Q-Point

Capacitive Sensor		Q-Point
Typically, around 12 areas only to sense. Also, depending on the actual printed circuit pattern.		Up to 256 areas. (Humans are believed to be able to use only up to 32 depending on the size)
* Q-Point will work good with force-sensing feature and, thus, will be used over a fixed surface area, while capacitive sensor is used over an areas such as LCD as a touch-screen, since capacitive sensor does not have force-sensing feature.

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