Wide Color Gamut Time-Multiplexed Stereoscopic Display Based on Scanning Backlight Unit Utilizing Sectional Light Guide Plates

Bin Xu,Yuanqing Wang

doi:10.1109/access.2019.2949093

Abstract

A time-multiplexed stereoscopic display with a wide color gamut is fabricated and introduced in this paper. It comprises a scanning backlight unit (SBLU), a 120Hz liquid crystal display (LCD) panel and a pair of LCD shutter glasses equipped with two switching lens (Manufactured by NVIDIA, Model: 3D VISION 2). We use sectional light guide plates to compress the light angle. We use blue LEDs (Domain wavelength: 450nm) to replace the traditional phosphor white LEDs used in the backlight. The blue LEDs are fixed on the edges of the sectional light guide plates, and the quantum dot-polymer (QDP) film is placed on the surface of sectional plates. The SBLU and auxiliary glasses could work together with the LCD panel. All of these components can be controlled by the vertical synchronization signal transmitted from the graphics card. The color gamut of our prototype is improved. According to ITU-R Recommendation BT.2020 (Rec.2020), the color gamut is widely extended to 77.61%. The display's ability to express color has been improved by using quantum dot (QD) material. The display brightness through the switching lens is about 120 nit. The crosstalk decreases to about 0.9%.

Highlights

It has been demonstrated that the stereoscopic display technique has many advantages in visual experience [1] and this technique has been used in many fields
The scanning backlight unit (SBLU) comprises 60 sectional light guide plates, which are utilized to compress the light angle in the prototype
Another improvement is that the traditional white LEDs are replaced by the blue LEDs

Summary

INTRODUCTION

It has been demonstrated that the stereoscopic display technique has many advantages in visual experience [1] and this technique has been used in many fields. When the right image begins to fill the panel, the internal circuit of the LCD shutter glasses controls the right switching lens to be transparent at the same time At this time, the traditional phosphor white LEDs, which are fixed on the edge of the light guide plate, are turned off. Wang: Wide Color Gamut Time-Multiplexed Stereoscopic Display Based on SBLU Utilizing Sectional Light Guide Plates FIGURE 5. The results show that the brightness through the switching lens of the active shutter glasses is about 120.00 nit when the pure white image (255, 255, 255) is displayed on the LCD panel. C. THE EVALUATION OF SIGNAL SYNCHRONIZATION In order to reduce the crosstalk, the time sequence of all blue LEDs should be controlled precisely, according to the vertical synchronization signal of the LCD panel. To avoid the polarization of the liquid crystal, the control signal of the switching lens changes periodically around the reference value

THE MEASUREMENT OF THE COLOR GAMUT

CONCLUSION