The first TV technology fully displays the true color spectrum

Scientists from the Swiss Institute of Technology said that with thousands of " super-prismatic " ranges controlled by machine muscles, they built the first kind of TV screen that could fully display the spectrum of colors. real.

Scientists have treated light to create a full spectrum of colors on the screen, which is not possible with today's TV technologies.

Mr. Manuel Aschwanden, a member of the research team, said: "Current monitors can only produce a certain range of colors. The main benefit of this new technology is that it can display all of the color ".

Current display technologies, such as cathode ray tube (CRT), LCD or Plasma TV screens, produce on-screen colors from three components of red, green and blue light. Other colors are made up of a combination of the three basic colors. For example, yellow is a mixture of red and green. To be able to display complex images, a screen must combine colors at thousands of separate points across the screen.

Different types of monitors will do this with many different methods. For example, an LCD screen is divided into tens of thousands of different pixels, each pixel is divided into three smaller pixels with red, green and blue filters. Changing the brightness of each sub-pixel will create a table of millions of different shades for the screen to use to display the photos.

Methods like these will not be able to create all the colors people see in real life. This is most evident when the screens reproduce the images of the sky.

Aschwanden said: "The blue of the sky in the photo you downloaded to your laptop is never the same as the real sky."

New TVs have the ability to fully display the spectrum of colors that the human eye can see. The reason for this limitation is that the three basic colors that screens currently use to reproduce colors on the screen are fixed. Green, blue and red colors are chosen by the manufacturer of the screen to use in a screen that determines all the other colors they create.

The new system of Swiss scientists, also known as electronically directed diffraction grids, is not confined to this basic three-color system anymore .

Instead, scientists have developed a more flexible method, which helps create a full spectrum of colors that the human eye can see.

To accomplish this, the team created what they called diffraction grids, a slotted net like a miniature blinds.

Diffraction grids are not something new. They have been used in projector systems and fiber optic communications.

However, unlike the current solid mesh, the new Swiss grid is made of a flexible polymer. This elastic material, such as rubber, is often used to make artificial muscles for robots because it has the ability to shrink when current flows.

When a white light source from a light emitting diode (LED) touches this grid, it will divide into a full spectrum of colors like a rainbow created from a prism. By putting different voltages into artificial muscles, the mesh will expand or contract, causing the light fan to change from side to side.

Even the latest display types cannot fully display the true color spectrum.(Photo: ND)

After that, people will isolate different colors from the color spectrum with a fixed small hole in front of the mesh. And when the voltage of the current is adjusted, different parts of the color spectrum will be aligned to this small hole.

In one screen, a lot of grids will be placed after each pixel will also help to create the blended colors, and create a full range of colors that the human eye can see.

Currently, the team has successfully fabricated a sample of 400 diffraction grids placed side by side. Although this sample screen is very small, its resolution is very high. Aschwanden said: "Its resolution is equivalent to a high-end LCD screen."

The team is currently trying to improve their experiments as well as finding ways to reduce the amount of power needed for the system to work. Early experiments required thousands of volts of voltage to control the muscles, but so far the team has reduced this number to only 300V, making this technology much more attractive to firms. electronic.

Aschwanden said, when the technology is complete, it could be used in microscopes, fiber optic communications as well as high-end monitors. "Adjusting or driving light is at the core of every optical system. This technology will provide a cheap, accurate way to do this," he said.