Japan Display Inc (JDI) announced the technologies used for the "light field display," which it announced at SID 2017, at SID 2018, which took place from May 20 to 25, 2018, in Los Angeles, the US (thesis number: 21.4).
The light field display is a 3D display that does not require special glasses. Video of an object displayed on it differs in accordance with the location of the viewer. It was developed in collaboration with NHK Media Technology Inc.
This time, JDI not only showed 3D still images but also played 3D video. It had a demonstration in an interview and at the exhibition site.
3D video with 69 viewpoints
JDI aimed to realize a display that features a wide viewing angle for 3D video and can play high-resolution 3D video. The viewing angle of a 17-inch light field display prototyped by the company is 130°. For playing high-resolution 3D video, it uses an 8k LCD panel with a pixel count of 7,680 x 4,320 and a resolution of 510ppi. Also, the company announced that the number of viewpoints of the light field display is 69.
For the newly-developed light field display, a barrier substrate was attached to the TFT substrate on the side of the LCD panel's backlight, and a polarizing plate was attached on top of it. The barrier consists of a region that blocks light and a region that transmits light. The barrier is used to control the direction of light and play 3D video supporting 69 viewpoints.
To obtain high-resolution 3D video, JDI optimized the barrier pitch and pixel array that displays 69-viewpoint images.
The duration of video played in the interview and at the exhibition site was about 20 seconds. 3D video was played by using an 8k content player. JDI developed a system that converts data consisting of multiple light beam images arranged like tiles to data compatible with the pixel array of the light field display in real time, enabling to play 3D video.