The need of 3D display has been increased and also various kinds of 3D display technology have been developed so far: stereoscopic, volumetric display, integral image and holography etc. In the case of using flat panel display, integral image and holography methods still have a problem of bad resolution, however stereoscopic methods including auto-stereoscopic multi-view display have recently become available at much lower price. As a result, the commercialization of stereoscopic displays for entertainment is receiving increasing funding.
Cross-talk optimized method by human eye
With 3D LCD type, slow LC response cause interference among input frames. This interference is shown as crosstalk between left and right eyes. It causes some symptoms with the pain, such as nausea or dizziness. Also cross-talk depends on who it is. This means that cross-talk optimized OD LUT for human's characteristics is especially necessary. Figure 1 shows the mimetic diagram for extracting the cross-talk optimized OD LUT with human's eyes and Fig. 2 shows the cross-talk pattern image through the LCD image panel and glasses.
It is difficult to find the accurate colorimetric information such as tri-stimulus values of each red (R), green (G), or blue (B) sub-pixel in the information displays such as cathode ray tubes (CRTs), liquid crystal displays (LCDs), and projection-type displays because there are many things to be considered; external flare, light leakage, backlight warm-up time, spatial independence, and so on.
The method for removing the light leakage
Theoretically the tri-stimulus values of the gray pixels are identical to the sum of those of the red-, green-, and blue-only pixels. However, LCD has a problem of light leakage since LC molecules cannot completely block the light even at a black state as shown in Fig. 1.
In order to remove the light leakage, we propose the simple mathematical algorithm likes Eq. (1).
In Eq. (1), XRnr, YRnr, and ZRnr are the real X, Y, and Z values of red sub-pixels only and XRni, YRni, and ZRni are the incremental values and XRnm, YRnm, and ZRnm are the measured values, respectively. Figure 2 show the result of luminance and chromaticity color coordinate when the light leakage is removed.
