The background color of a TN LCD is one of the important issues of the liquid crystal flat panel display technology,
especially as the panel size gets bigger and the displayed information content gets larger. Therefore, in the first part
of this paper, we carried out (1) a theoretical calculation of the color coordinates as a function of And for the range
of the ind from 0. 1 jm to 2.0 jtm, which cover the first, second, and third Gooch and Tarry minima; and (2) theoretical
calculations for the color coordinates as a function of viewing angle near the first, second and third Gooch
and Tarry minima. Our experimental results corresponding to the above two cases will also be presented for cornparison.
Our data shows that our theoretical results agree reasonably well with the experimental ones. In the second
part of this paper, we will use the above experimentally verified theoretical method to study and compare the color
quality of the single-gap NB mode, the multi-gap NB mode, and the NW mode LCDs. The result will provide
important information for LCD design and the selection of a mode of operation.