Proposal: SPD technology, or suspended particle device, is a newly discovered
technological advancement that allows consumers to control and adjust how
much glare, sunlight, and solar heat can pass through glass such as those on
their windows at home, offices, and automobiles. Applying this technology on car
windshields would enable the driver to control the “tint” on their windows, giving
them optimum comfort without having to deal with the everyday annoyances of
glare and solar heat, further maximizing visibility on the roads.
SPD, also known as suspended particle device, is a technological advancement
of glass and plastic products that gives the consumer the ability to manually adjust the
tint on their windows at the push of a button. The SPD involves a film that holds millions
of microscopic, light-absorbing particles that is placed in between the glass layers of
windows, skylights, sunglasses, etc. (Pickrell, 2007). The film is set up so that the
consumer applies the desired voltage amounts of electricity that cause the windows to
become crystal clear or darkly tinted (Romano, 2007). When there is no applied voltage
or the film is left in an “off” state, the particles are randomly scattered across the pane,
leaving no open space for light to pass as the particles absorb all the sunlight that hits.
On the other hand, when the consumer turns it “on” or applies electricity, the window
turns back to being clear as the particles will then align and leave room for light to pass
through (Pickrell, 2007). The image below shows when the black dots, or suspended
particle devices, float freely along the film in between the two panes of glass to block
incoming light and when they align to let light pass through.