Sunday, February 15, 2015

UIST 2014: Skin Buttons - Yes It Is Practical


There are many interesting researches, new devices and new projects at the SCM UIST 2014. Some projects are super creative when the others are very practical in improving existing technologies. After going through all the videos in the SCM UIST 2014, I find that even though these innovations and works are excellent and worth credited for, there are not many can be actually apply in solving the real work problems now or in a very near future.  Skin buttons is however can be seen as one of the bright project for future deployment and can promise a great success.

The five researchers at the Carnegie Mellon University have come up with the idea of laser projections to solve the problem of small screen such as smart watch. They developed a prototype that can project laser icons on skin that allow users to touch it as touch buttons. The prototype can be easily integrated to smart watches or other devices. The video provided by them about the prototype is very impressive.


As seen on the video, these laser icons act like buttons and users can use it to fully interact with the connected device. These laser buttons are clickable and clearly visible on the user skin.

There are 2 main components are used in the prototype: the button projectors and the touch sensing. The button projector is implemented by combining a tiny laser projector with a fix button image film. The touch sensing is achieved by using a photo transistor/emitter. The transistor/emitter measures the intensity of reflected infrared from the surface. The commination of these two creates the touch touchable laser buttons.

The initial testing carried out by them shows a high accuracy with 96.9% correct click. In addition, the power measure of the sensors is as slow as slow as 1mW and the laser projector is 19.9mW. The paper also indicates that adjusting the brightness and the sleeping mode of the device can reduce the use power. The cost of production of the prototype has been estimated at around 5$ which is relative cheap and can be potentially reduced rapidly if go on mass production.

Although the paper and the video shows the functional prototype, the project is still in an early stage of development with some limitations such as fix icon projectors only and uncontrolled brightness of the icons. Still, the project has show that it can be used to improve the interaction with small touch screens. In addition, it can be used as the main interaction in some specially environments where touch screen is impossible such as under water. I may also be used to aid user with disability.

Personally, I find the prototype is really “cool”. The “cool” thing is that it projects nice looking and eyes catching image right on the skins. Another “cool” thing is it can be used as part of the smart watch, which is a trend now. All the big names namely Samsung, Apple, Sonny, and LG have already joined the wearable gadget games. Hence, the future deployment of the skin buttons is a promise.


Here is the link to the original paper at SCM UIST 2014

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