Before drawing anything, people should shake the device like when they paint with a spray paint can but, instead of mixing up aerosol of paint, electric power is generated and charged. This spray-can-shaped devices are everlasting without any battery change because they are recharged by just shaking several times. With this unique spray can, people can spray light, not the traditional liquid paint, which is projected on the wall creating a 'light graffiti'.
The light sprayed drawing shows a unique visual. For example, contrary to the liquid paint, the light drawing gets brighter when the strokes are overlapped and they are blurred in different ways from usual painted strokes. The sprayed light projected on the screen slowly fades out as time goes by and people can draw over and over on the same screen. People who feel like leaving their own light graffiti works forever can upload them as image files to the online gallery and see around other people's works tagged with times and places.
With ˇ°Light Sprayˇ±, a limited wall becomes a boundless canvas which contains many people's drawing and anyone can be a graffiti artist. And with this unique spray can, people can experience the whole new material of paint, light, forever.
Fig 1. Concept illustration
Fig 2. Floor plan
Fig 3. Anatomy of the spray can
Each spray can contains an LED light tuned to emit a particular color spectrum. By shaking the spray can, magnet moving up and down inside the enamel coil generates electricity that is charged into a lithium battery. Thus, this spray can works permanently without changing batteries. Shaking and pressing a switch on top of the nozzle turns on the LED light and its color is projected to the screen.
The camera installed behind the screen (or on top of the LCD screen) captures the light and pile up creating a trail of the LED light. The image of the trail is projected on the screen (or shown on the LCD screen) matching the spot where the light is sprayed.
The light fades out slowly and the wall gets clear for a new drawing. But the disappeared light graffiti is saved as an image file and uploaded on the ˇ°Light Sprayˇ± website (http://everyware.kr/lightspray) with tags of time and place when and where the light grafffiti was created.
Fig 4. Drawing test 1
Fig 5. Drawing test 2
Fig 6. Captured light drawing
Light Spray (2009, Prototype)
Processing