NHK, Sharp Co-develop 85-inch Super High-Vision LCD Display

May 20, 2011
Shinya Saeki, Nikkei Electronics
The 85-inch LCD display with a pixel count of 7,680 x 4,320
The 85-inch LCD display with a pixel count of 7,680 x 4,320
[Click to enlarge image]

Japan Broadcasting Corp (NHK) and Sharp Corp announced that they have developed an 85-inch LCD display compatible with Super High-Vision (SHV), or a pixel count of about 33 million (7,680 x 4,320).

NHK has been engaged in the development of an SHV-compatible projection display that is used together with a projector (See related article).

"This is the world's first direct-view-type SHV display," said Kenji Nagai, the company's executive director general of engineering.

The pixel pitch and brightness of the 85-inch LCD display are 0.245mm and 300cd/m2, respectively. It can display one billion colors (red, green and blue x 10 bits). It shows 7,680 x 4,320-pixel SHV video on the screen at a rate of 60 frames per second (fps) by using 16 HDMI cables.

The LCD display was prototyped at Sharp's production line for large LCD panels.

"We started designing the panel about two years ago and completed the panel in the last autumn," said Shigemitsu Mizushima, Sharp's executive managing officer. "After that, we have been making images and so forth."

"By realizing a display with the large screen size, super-high resolution and high image quality, it became possible to offer high realistic sensation and immersiveness that cannot be realized by traditional TVs," he said.

To develop the display that has 16 times higher pixel count than existing TVs, Sharp utilized all the technologies that the company has been developing and introduced new technologies, Mizushima said. One of those newly-introduced technologies is what the company calls "low-load wiring technology."

To transmit 7,680 x 4,320-pixel video signals to the panel without delay, Sharp employed a wiring material and wiring structure that are different from those used for existing TV panels, he said. But he did not disclose the details of the material.

In regard to the new display's performance as an LCD display, Mizushima said, "We used the highest-level technologies." Specifically, Sharp employed the "UV2A" photo-alignment technology, which has already been introduced to its Second Kameyama Plant and Sakai Plant, as well as direct-lit LED backlight using red, green and blue LEDs as light sources.

Though the color gamut and contrast ratio of the new LCD display were not disclosed, the company said that they are higher than those of existing TVs.

NHK has been engaged in the research and development of SHV as a "super-high resolution video system," which exceeds the current digital broadcasts, since 1995, aiming to commence test broadcast in 2020. Also, it plans to start commercializing 3D video based on the integral photography (IP) method, or "aerial image reproduction type 3D TV," in 2030.

The 85-inch LCD display will be exhibited at NHK Science & Technology Research Laboratories' Open House 2011, which will take place May 26 to 29, 2011.