Hello everyone, my name is Chi Zhang from Swansea University.
Today I'm going to introduce the Active PinScreen. Multiple
fingers are often used for efficient interaction.
Currently, tactical feedback provided is filled on finger pad
or the palm with low precision sensations. In contrast, we
proposed a new tactile feedback technique that applies localised
stimuli on multiple fingers with fine spatial and temporal
resolution.
A close-up view of the devices is showing in the finger. The
small nature of this prototype allows it to fit comfortably on
the back of a standard touchscreen device.
Following these ideas. The developer makes the prototype
based on an actuated micro-pin array, as shown in the figure
on the top.
The figure on the bottom illustrates an individual pin
unit, which can be addressed individually.
To create a directional sensation, we need to first
define a block of pins, which is known as a frame, each pin in
the same frame will be activated at the same time. Then we also
need to define the actuation time of frame and the frame to
frame delay.
To define a directional pattern, we need to actuate the frame by
frame in a sequence.
The figure shows an example of a left to right directions.
We developed the lab study to evaluate whether the user can
recognise these tactical patterns. During the study user
needed to hold the prototype as shown in the figure on the left.
The figure on the right shows the directional patterns we test
in study one. We test the same and different direction
movements on two fingers.
For study two we test the within-finger directional
recognising rate.
For user study three we test the pattern recognition rate on
three different grip orientations.
We found out that users are able to detect a range of directional
patterns using our Active PinScren and they are better for
the movement of the same direction on two fingers then
different directions. They are also got high recognition rates
for patterns across fingertips.
The three shapes that combined the within-finger and the
inter-finger patterns achieved the relative high recognition
rates and this was reliable even when changing grip orientations.
We come up with several applications which can use
Active PinScreen, such as eyes free interaction, thing,
enriching haptic message and notification, and the even eyes
on to improve the eyes on interfaces.
The prototype can be improved as following methods.
And in the future. We're going to test the Active PinScrene in
real world scenarios. larger areas of Active PinScreen could
also be developed to allow sensations are more than two
fingers, or even full plams. Different configurations will
also be developed to suit different scenarios or devices.
Thanks, that's all.