Crosstalk in circularly polarized (CP) liquid crystal display (LCD) with polarized glasses (passive 3D glasses) is mainly caused by two factors: 1) the polarizing system including wave retarders and 2) the vertical misalignment (VM) of light between the LC module and the patterned retarder. We show that the latter, which is highly dependent on the vertical viewing location, is a much more significant factor of crosstalk in CP LCD than the former. There are three contributions in this paper. Initially, a display model for CP LCD, which accurately characterizes VM, is proposed. A novel display calibration method for the VM characterization that only requires pictures of the screen taken at four viewing locations. In addition, we prove that the VM-based crosstalk cannot be efficiently reduced by either preprocessing the input images or optimizing the polarizing system. Furthermore, we derive the analytic solution for the viewing zone, where the entire screen does not have the VM-based crosstalk.

Crosstalk, which is the incomplete separation between the left and right views in 3D displays, induces ghosting and causes difficulty of the eyes to fuse the stereo image for depth perception. Circularly polarized (CP) liquid crystal display (LCD) is one of the main-stream consumer 3D displays with the prospering of 3D movies and gamings. The polarizing system including the patterned retarder is one of the major causes of crosstalk in CP LCD. The contributions of this paper are the modeling of the polarizing system of CP LCD, and a crosstalk reduction method that efficiently cancels crosstalk and preserves image contrast. For the modeling, the practical orientation of the polarized glasses (PG) is considered. In addition, this paper calculates the rotation of the light-propagation coordinate for the Stokes vector as light propagates from LCD to PG, and this calculation is missing in the previous works when applying Mueller calculus. The proposed crosstalk reduction method is formulated as a linear programming problem, which can be easily solved. In addition, we propose excluding the highly textured areas in the input images to further preserve image contrast in crosstalk reduction.

Crosstalk is the most critical artifact in stereoscopic 3D displays. Circularly polarized (CP) 3D LCDs with passive glasses has the issue of crosstalk especially when the viewer moves vertically away from the screen center. In this work, a new display model for CP LCD is proposed which considers both the intrinsic optical system including the polarizer and the wave retarder, and the vertical misalignment (VM) of light between the liquid crystal (LC) and the patterned retarder (PR) as the two major factors causing crosstalk in CP LCDs. The optical modeling for the display uses Mueller calculus and the characterization of VM is realized by the proposed user-calibration method. The display model is proved to be accurate by both measuring and subjective test in predicting the crosstalk resulted from different viewing scenarios. Additionally, we proposed considering image texture for the estimation of crosstalk perception. The proposed estimation is shown to be consistent with the viewer's observation.

Passive-type stereoscopic LCD display (or polarized 3D TV) generates 3D effect using quarter-wave patterned retarders and polarized glasses. However, passive-type stereo-scopic displays are susceptible to an undesirable effect called “crosstalk”, which degrades the 3D effect and causes increased eye strain and nausea. In this paper, crosstalk in passive 3D LCD is modeled, analyzed and simulated by implementing extended Jones matrix method. We present how the display intensity changes with viewing angles and simulate stereo images with crosstalk. Furthermore, a method of crosstalk cancellation based on linear programming in YCbCr domain is proposed. Results of our proposed method show that zero crosstalk can be achieved in passive 3D displays with less contrast loss compared with other methods.