Liquid crystal device and projection display device
A liquid crystal device, liquid crystal technology, applied in projection devices, optics, instruments, etc., can solve the problem of contrast ratio decline, and achieve the effect of high contrast ratio display
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no. 1 Embodiment approach
[0037] Below, refer to figure 1 ˜ FIG. 4 illustrate the first embodiment of the present invention.
[0038]The liquid crystal device of the present embodiment is an active matrix transmissive liquid crystal device using TFTs as switching elements.
[0039] figure 1 It is an equivalent circuit diagram of switching elements, signal lines, and the like of a plurality of pixels arranged in a matrix in the transmissive liquid crystal device of the present embodiment. figure 2 It is a plan view of main parts showing the structure of a plurality of pixel groups adjacent to a TFT array substrate forming data lines, scanning lines, pixel electrodes, etc. Figure 3 is a representation of figure 2 In the plan view, only the light-shielding film is taken out. Figure 4 is figure 2 The A-A' line profile. In addition, in FIG. 4 , the upper side in the illustration is shown as the light incident side, and the lower side in the illustration is shown as the viewing side (observer side)....
no. 2 Embodiment approach
[0058] Hereinafter, a second embodiment of the present invention will be described with reference to FIGS. 5 and 6 .
[0059] The basic structure of the liquid crystal device of this embodiment is the same as that of the first embodiment, but the structure of the light-shielding film is different.
[0060] 5 is a plan view showing only the first light-shielding film of the liquid crystal device of the present embodiment taken out, and FIG. 6 is a cross-sectional view taken along line B-B' of FIG. 5 . However, in FIG. 6, only the part from the main body of the TFT array substrate to the first interlayer insulating film 12 is shown, and the upper layer side above the TFTs is omitted from illustration. Therefore, only the structure of the light-shielding film will be described below using FIGS. 5 and 6 .
[0061] In the first embodiment, the first light-shielding film 11a provided on the TFT array substrate 10 is formed integrally in a lattice shape with the same layout of the m...
no. 3 Embodiment approach
[0064] Next, a third embodiment of the present invention will be described.
[0065] The basic structure of the liquid crystal device of this embodiment is the same as that of the first embodiment, except that the structure of liquid crystal molecules is different.
[0066] In the first embodiment, the initial alignment of liquid crystal molecules is horizontal, and a liquid crystal mode in which the twist is 90° is used, but in the third embodiment, liquid crystal molecules are initially aligned almost vertically, and a liquid crystal mode in which no twist occurs is used. Here, the term "substantially vertical" refers to a form in which 5° is added from the vertical axis as a pretilt angle for determining the degree to which the liquid crystal molecules fall when a voltage is applied. SiO can be used as a vertical alignment film 2 The material is obtained by vapor deposition from the perspective of the vapor deposition device. The pretilt angle and photopic direction are d...
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