JPS6151125A - Liquid-crystal display device - Google Patents

Abstract

PURPOSE:To obtain a display which has a visual field angle in two directions by providing >=2 display patterns in an upper and a lower substrates, and making their orientation directions different according to visual field angles in the two directions. CONSTITUTION:A liquid crystal oriented film is formed on display patterns 1a and 1b provided on the upper and lower substrates 2 and 3. The display pattern of the upper substrate 2 is rubbed by a mask method as shown by arrows I and K and the display pattern of the lower substrate 3 is rubbed as shown by arrows I and K to orient liquid crystal. Then, TN liquid crystal is charged between the two substrates 2 and 3 to manufacture a liquid crystal panel 1. Polarizing plates 4 and 4' are arranged on and under the liquid-crystal panel 1 so that polarization directions L and M coincide with the orientation directions of the substrates 2 and 3 respectively. pbtaining the liquid crystal display device. The visual field angle of the display pattern 1a is in a direction A and that of the display pattern 1b is in a direction B, but the orientation is performed in direction H' and J' to obtain visual field angles in directions C and D.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a liquid crystal display device that can be used for displaying viewing angles in different directions within the same panel.

Conventional configurations and their problems Recently, liquid crystal display devices that take advantage of their features such as thinness, light weight, and low power consumption are being applied to fields such as calculators, various watches, counter display boards, and game devices. . Moreover, as the liquid crystal used in these, nematic liquid crystal (hereinafter referred to as TN type liquid crystal) having positive dielectric anisotropy is mainstream.

Conventionally, in TN type liquid crystal display panels, the liquid crystal is aligned in the same direction for all display patterns on the same substrate, so viewing angle dependence is strong, and display from different viewing angles is difficult. Due to problems such as low contrast and poor display quality, the viewer's viewing angle was limited to a single direction.

Purpose of the Invention The present invention has been made in view of the above-mentioned conventional problems, and by changing the orientation direction of the liquid crystal of the display pattern on the same substrate in different directions depending on the required viewing angle, the present invention can be used to An object of the present invention is to provide a liquid crystal display device that can display images having viewing angles in two different directions.

Structure of the Invention In order to achieve this object, the liquid crystal display device of the present invention includes display patterns provided on upper and lower substrates so that two or more display patterns exist in the same plane, and an alignment treatment of the display patterns on at least one substrate. The directions are different depending on the viewing angles of the two directions, and different display patterns can be viewed from different directions within the same liquid crystal panel.

DESCRIPTION OF EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 shows an exploded perspective view of a liquid crystal display device according to an embodiment of the present invention.

First, a liquid crystal alignment film is provided on display patterns 1a and 1b provided on two upper and lower substrates 2 and 3.

Next, the display pattern of the substrate 2 above this alignment film is arrow H,
The display pattern of the T direction and the lower board 3 is arrow I,
Liquid crystal alignment is performed by rubbing in the K direction. At this time, since the alignment directions are different from each other in the direction of arrow H, 1 or the direction of arrows I and K, anisotropic alignment processing can be performed by rubbing through a mask having windows only in the desired alignment region.

The two substrates 2 and 3 thus obtained are bonded together with a sealing resin and thermally cured, and then TN type liquid crystal is sealed to produce the liquid crystal panel 1.

Next, a liquid crystal display device is fabricated by arranging polarizing plates 4 and 4' above and below the liquid crystal panel 1 so that the polarization direction and M are in the same direction as the liquid crystal alignment direction of the upper and lower substrates 2 and 3, respectively. That's what I do.

By the way, according to the liquid crystal alignment direction of this embodiment, the viewer's viewing angle is as shown in FIG. '
, 1' direction, viewing angles of the display patterns 1a and 1b can be obtained in the C direction and the D direction, respectively. In addition, as shown in FIG. 3, polarizing plates 4, 4 are arranged above and below the panel to align the liquid crystal in the M, N, and O directions.
If ' is also placed in the same direction as the liquid crystal alignment direction of the upper and lower substrates 2 and 3, display with viewing angles in the E direction and F direction can be obtained, respectively. Similarly, when the liquid crystal is aligned in the L', M, N', and O directions, a panel having viewing angles in the G and P directions can be obtained.

In addition, in FIG. 4, the orientation on one substrate is the display pattern 1a.
, 1b are in the same direction S, and the orientations on the opposing substrate are in different directions t and u for each display pattern 1a and 1b, and the viewing angle is in the Q direction, respectively.

This will be the R direction.

Here, the directions of the two types of viewing angles of the display panel are not limited to those in this embodiment, and the upper and lower substrates are orientated so that the viewing angles in the 2fii directions are opposite directions or orthogonal directions, and further, If polarizing plates having polarized light in the orientation direction are arranged above and below, the viewing direction relative to the panel can be set in any direction.

In short, when manufacturing a panel with viewing angles in two different directions using the same liquid crystal display panel, the display pattern corresponding to each viewing angle is first created by placing the alignment film in different directions on at least one of the same substrates. Then, the facing substrate side is aligned in the same manner.
Moreover, by performing orientation treatment at an angle that intersects the orientation direction on one of the substrates, and further bonding polarizing plates with polarization in the same direction as the orientation direction of the upper and lower substrates on the top and bottom of the panel, two types of A liquid crystal display device having a viewing angle in the direction of is obtained.

Effects of the Invention As described above, according to the present invention, a display having viewing angles in two different directions can be obtained within the same liquid crystal panel. This can be applied to a wide range of applications such as portable liquid crystal display devices, especially calculators, watches, and game consoles.

[Brief explanation of drawings]

FIG. 2 is a plan view showing viewing angles of a liquid crystal display device. 1...Liquid crystal display panel, 1a, 1b...
... Display pattern, 2, 3... Board.

Claims (1)

[Claims] Display patterns are provided on the upper and lower substrates so that two or more display patterns exist in the same plane, and the directions of the orientation treatment of the display patterns on at least one of the substrates are set in different directions depending on the viewing angles of the two directions. Characteristic liquid crystal display device.