PpigScience: LED

Samsung's 3D Cinema LED screen has debuted at ISE 2018 in Amsterdam(Credit: Samsung)

Less than a year ago, Samsung unveiled a cinema-sized LED screen capable of 4K resolution and HDR, and followed this in July with its first commercial installation at a theater in Seoul, South Korea. Now the company has revealed a 3D version at the Integrated Systems Europe 2018 expo in Amsterdam.
Samsung says that folks who have watched movies on a Cinema LED Screen feel as though they've been viewing footage in 3D, thanks to higher peak brightness, true-to-life colors, high contrast and sharp, vibrant images. The company's developers were subsequently challenged to take this cinema projector killing technology to the world of actual 3D movies.
"The existing 3D cinemas had to compromise between brightness and resolution," said Samsung's Dongsoo Koo. "The screen is dark as if the viewers are wearing sunglasses in the theater. The brightness is already halved, and with the 3D glasses that audience must wear, it becomes a one-third level compared to other 2D films. The resolution is halved too. It is inevitable as the videos for the left and right eye are overlapped and reflected."
Samsung reports that its 3D Cinema LED display not only manages to deliver the same brightness and resolution as its Cinema LED Screen, but also makes use of a specially-developed algorithm to completely stop left/right eye crosstalk – one of the causes of dizziness while watching 3D movies. The company is promising viewers the same watching experience no matter where they are seated in the theater, too.
"The left video should be seen only by the left eye and the right video only by the right eye," explained Koo. "But there are moments when our eyes receive overlapped imagery. This is called 'crosstalk,' and the repetition of crosswalk causes the dizziness and headache. Fortunately, our developers came up with an algorithm for 3D Cinema LED to completely get rid of any crosstalk from happening, therefore dealing with the dizziness and headache issues."
We've no word on when the 3D Cinema LED display will make its way to movie theaters – other than a vague "soon" – but you can see a brief demo of the system in the video below.

Source: Samsung, NewAtlas

Visitors to NASA's Kennedy Space Center will soon be greeted by a huge high-tech path, made up of piezoelectric tiles that light up and harvest their own energy(Credit: Francisco Valdes, Georgia Tech)

In today's concrete jungle, pavement takes up a lot of space, so we might as well cram some smarts in there. Previously we've seen ground coverings that light up, absorb solar energy, generate electricity from the footsteps of pedestrians, and even emit Wi-Fi signals. Now NASA is combining a little of all of those in a high-tech new path due to greet visitors to the Kennedy Space Center.

The US$2 million installation is made up of about 1,000 tiles spread across 40,000 square feet (3,700 sq m). These tiles form mosaic images of Earth, Mars, the Moon and the International Space Station, but it's what's inside that counts.

Each tile contains circuit boards, six small solar panels, a battery, LEDs, a Bluetooth and a Wi-Fi transmitter, micro controllers and a piezoelectric element. All of this is encased in cavities in thin, high-performance concrete and topped off with a strong glass tile. Piezoelectric systems generate energy from mechanical stress, and in this case that means footsteps.

Each tile in NASA's high-tech new path contains circuit boards, six small solar panels, a battery,...

"No one has made anything like this — an outdoor tile system using a piezoelectric element to trigger customized and off-the-shelf electronics and coupling them for human interactions," says Ilan Stern, senior research scientist at Georgia Tech, which is collaborating with NASA on the project. "When you step on the load-bearing glass tile, it compresses the piezoelectric element, creating an electrical charge that lights up the cavity's 125 LEDs."

Along with lighting up in a variety of colors, the tiles can also beam a wireless signal to the phones of passersby to deliver nuggets of wisdom on NASA's space missions, the mechanics of piezoelectric technology, and other things.

"The piezoelectric element also powers a Wi-Fi or Bluetooth signal to visitors' smartphones, which can play audio, providing information about their geolocation and for potential wayfinding," says Stern. "The audio provides information such as how much energy is being generated throughout the park during the day."

The system is completely self-powered, but not just by the piezo elements: The solar arrays are constantly absorbing energy from the Sun as well, and it's all stored in a rechargeable lithium battery for nighttime use.

Ultimately, the aim of the project is to showcase "smart city" applications of the technology. Installations like these could be used to power local devices like street lights, guide visitors to points of interest, or collect real-time information about traffic and road surface conditions.

"We need a more flexible use of the electric grid," says Stern. "Our goal is to develop more self-powered, self-generating systems with added storage that will give us more choices in energy usage and minimize waste. As much as possible, we should convert wasted mechanical energy—human and vehicle movement — into usable energy generation and storage."

Source: Georgia Tech, NewAtlas