Heightened demand for contactless touch panels is being seen as measures are taken to prevent the spread of novel coronavirus infection. Until now, the use of devices that create floating images and detect the movement of users' fingers with sensors has been limited because the depth required by the structure can make installation in many locations difficult, according to the release. Visibility problems have also been experienced with conventional aerial touch displays since visuals tend to be dark and blurry and ghost images appear due to light leaking in unintended directions as it travels through the plate.
Toppan has leveraged its expertise in optical and structural design for industrial-use high-definition LCDs to develop a space-saving, slim aerial touch display with high-visibility that can be embedded into walls. It has developed a product that generates aerial images that are parallel to the LCD panel, which contrasts with conventional designs displaying images at an angle of approximately 90 degrees.
Testing by Toppan has shown the use of its high-transmission TFT display and optical design technologies produces a display that achieves a luminance roughly five times that of conventional products and enables the generation of clear aerial images that are free of ghost images, according to the press release.
Toppan's display uses infrared spatial position sensors and Time of Flight range-imaging sensors to detect when users touch elements of the aerial image. This facilitates intuitive, contactless operation by hand or by using an item such as a pen. The display's restricted viewing angle of 15 degrees left and right prevents PINs, passwords and other sensitive information being seen by people nearby, making it ideal for use in settings requiring high levels of security.
The aerial touch display features a 7-inch high-contrast, high-luminance TFT display with a resolution of 800 x RGB x 480. Samples have a width of 285 mm, height of 285 mm, and depth of 60 mm and weigh approximately 1.9 kg.
"Toppan is very excited to have successfully developed an aerial touch display of this type,"
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