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JDI Targets High Pixel Density LCDs for VR Applications
May 21, 2018
 
Japan Display Inc. (JDI) announced the development of a 3.25-inch 1001ppi low LTPS TFT LCD specifically-designed for VR head mount displays (HMD) applications. JDI plans to start commercial shipments by the end of March in 2019, and will accelerate the design of even higher resolution displays for VR-HMD applications in the future. In order to achieve natural and realistic motion pictures in VR-HMD devices, the desired display characteristics are: high pixel density, improved motion blur, and low latency. JDI announced the development of a high-pixel-density 803ppi LCD last year, which helped to alleviate problems associated with users noticing the screen door effect. However, even more compact-size LCDs and higher magnification lenses are required to decrease the size and weight of HMD devices. JDI believes 800ppi is not sufficient for this purpose. Instead, display resolution over 1000ppi is anticipated from the market.
​
JDI’s new 1001ppi LTPS TFT LCD not only features high pixel density, but also has improved LC response time from 4.5msec to 2.2msec (gray-to-gray, worst case), which helps to reduce motion blur. In addition to these features, the 1001ppi LTPS TFT LCD is able to operate at 120Hz refresh rate, though most displays for VR-HMD applications operate below 90Hz. This 120Hz refresh rate contributes to minimize lower system latency.
 
Figure 1: Comparisons of Pixel Density

Picture
Source: Company

The VR display market is almost exclusively OLED based because of the technology’s inherent high contrast, fast response time, thin form factor and high pixel density. JDI’s product attacks these characteristics but still falls below the current OLED performance levels, so it is difficult to understand what advantages the JDI products will have unless, they offer a much lower price.
 
Table 1: JDI’s VR panel Spec Comparison
Picture
Source: Company

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