LCD Screen Scissored and Attached to Window for Signage

Mar 5, 2009
Masao Oonishi, Nikkei Microdevices
A window-attachable LCD screen called "ViVid Screen." Above is the 40-inch model, and below is the A4 model.
A window-attachable LCD screen called "ViVid Screen." Above is the 40-inch model, and below is the A4 model.
[Click to enlarge image]
The "Tanyo" LCD film can be sharply bent or holed. The photo shows the opaque white state with the power off.
The "Tanyo" LCD film can be sharply bent or holed. The photo shows the opaque white state with the power off.
[Click to enlarge image]
The transparent state with the power on
The transparent state with the power on
[Click to enlarge image]
The film can be cut into a desired shape and used as a screen.
The film can be cut into a desired shape and used as a screen.
[Click to enlarge image]
With a sponge-like structure, the liquid crystals inside will not leak even when the film is sharply bent or holed.
With a sponge-like structure, the liquid crystals inside will not leak even when the film is sharply bent or holed.
[Click to enlarge image]

LinkEarth Corp developed a window-attachable digital signage film, "ViVid Screen," equipped with an LCD screen that changes its color from opaque white to transparent when electricity is applied.

The film can be used as store signage by displaying images projected from behind. So far, there have only been products that are installed integrally with a window. But the ViVid Screen can be attached to existing windows to display movies. This was enabled by the adoption of the Gecko Pocket, a sheet that can be repeatedly attached and removed and is manufactured by VKF Renzel GmbH of Germany.

The ViVid Screen was exhibited at Japan Shop 2009, which runs concurrently with Lighting Fair 2009, at Tokyo Big Sight from March 3 to 6, 2009.

The new window-attachable LCD screen comes in postcard size, A4 size and 40 inches. Although there is no manufacturer's suggested retail price, the price of the 40-inch model is expected to be about ¥150,000 (approx US$1,508). At present, LinkEarth produces LCD screens with a size up to 80 inches and can make a 80-inch window-attachable LCD screen if asked by a customer.

Images projected by a projector cannot be clearly seen in direct sunlight. Therefore, users can, for example, turn on the screen to make it transparent so that passers-by can see the items in the shop window. And, during the hours when the sun isn't as bright, they can turn off the screen to make it opaque white so that images can be projected onto it by a projector.

Furthermore, it is possible to attach the screen to part of a window and remove it during the daytime. The film can be invisible when not being used as a screen. Because the window-attachable poster sheet type of the ViVid Screen is a pocket, users can insert point-of-purchase materials inside.

There have been LCD screens that become transparent when electricity is applied. But, by using a sponge-like polymer acrylic structure between films, LinkEarth developed a film that can hold liquid crystals without ball spacers and obtained a patent for this invention.

Thanks to this sponge-like structure, the liquid crystals stored inside will not leak even if the film is sharply bent or holed. And the company suggests cutting the film into a desired shape and use it as a screen.

This time, LinkEarth also developed a screen divided into strips that are driven in a switching manner. The company suggests projecting images by switching from strip to strip so that the images on the screen can keep up with people walking in front of them.