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Author Topic: How Does A Mouse Panel Work ?  (Read 5146 times)

Offline neilep

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How Does A Mouse Panel Work ?
« on: 28/03/2008 16:12:48 »
Dear Mouse Panelologists,


Herewith for your perusal are a selection of computer related mouse stuff !








I know how those two work..





but how does this mouse panel work ?






Does it always have to be the same aspect ratio as the screen ?......and what happens when you place two fingers upon it , but apart ?

They are really sensitive.....so ...how do they work and why do they only work when fingers are used (no fish fingers)......ie: they don't work with a rubber/eraser.


Thanking ewe










« Last Edit: 07/04/2008 22:42:37 by chris »


 

Offline Karen W.

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Re: How Does A Mouse Panel Work ?
« Reply #1 on: 28/03/2008 16:27:45 »
Perhaps ones body puts out a certain amount of electric stimuli to activate the mouse pad..or perhaps heat..??? Just guesses though!
 

Offline Seany

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Re: How Does A Mouse Panel Work ?
« Reply #2 on: 28/03/2008 16:38:46 »
Two fingers work, as long as you don't take one off and keep the other one on.. Then it like moves around as if.. You know

I'm not sure about whether it has to have the same ratio!
 

Offline techmind

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Re: How Does A Mouse Panel Work ?
« Reply #3 on: 07/04/2008 18:33:00 »
The touchpads use a buried grid of wires, and work by capacitance sensing.
They can get confused by droplets of sweat (not an issue in the present weather!).

Because they sense capacitance, they won't respond to non-conducting stylii such as plastic pens or glass rods. They should respond to conducting things like fingers and metal pens, cutlery, or screwdrivers (careful - they're fragile).

Synaptics ( http://www.synaptics.com/ ) are probably the biggest/best-known manufacturer of these things. They were also responsible for the iPhone interface.
 

Offline qazibasit

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How Does A Mouse Panel Work ?
« Reply #4 on: 14/06/2008 22:06:54 »
simple technical stuff, old mouse contains a ball in it which moves the two gears on the two planes the ball moves them and the rotation of gears was detected by the motion sensors.
in optical mouse there is a motion center directly at the base.
on the mouse pad the movement of fingers are detected by the pad which transmits the axis of motion.
 

Offline Bored chemist

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How Does A Mouse Panel Work ?
« Reply #5 on: 15/06/2008 10:38:57 »
"on the mouse pad the movement of fingers are detected by the pad which transmits the axis of motion."
Obviously, but how?
 

Offline qazibasit

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How Does A Mouse Panel Work ?
« Reply #6 on: 15/06/2008 22:05:52 »
the pad contains a thermosensitive diode which basically do this function.
 

Offline Bored chemist

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How Does A Mouse Panel Work ?
« Reply #7 on: 16/06/2008 20:54:32 »
Oddly nobody seems to have thought of that, or at least they haven't put it here.
http://en.wikipedia.org/wiki/Touch_screen

Perhaps you would care to tell us what, exactly you mean.
 

Offline Poetic-Justice

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How Does A Mouse Panel Work ?
« Reply #8 on: 20/06/2008 18:21:35 »
The touchpads use a buried grid of wires, and work by capacitance sensing.
Mousepads don't have buried grids of wired... neither would most modern types of touch/mouse pads.

When I can borrow my friends camera, i'll post a picture or two of the back of my mousepad. No grid of wires there.

The method your thinking about might be this one...:
Quote
The capacitive shunt method, described in an application note by Analog Devices[5], senses the change in capacitance between a transmitter and receiver that are on opposite sides of the sensor. The transmitter creates an electric field which oscillates at 200-300 kHz. If a ground point, such as the finger, is placed between the transmitter and receiver, some of the field lines are shunted away, decreasing the apparent capacitance.

No grid of wires there.
 

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How Does A Mouse Panel Work ?
« Reply #8 on: 20/06/2008 18:21:35 »

 

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