JPS60256120A - Liquid crystal panel - Google Patents

Abstract

PURPOSE:To obtain a good visual field direction in the center of a liquid crystal panel and improve a field angle characteristic by setting the rubbing treatment direction of one substrate of the panel concentrically and that of the other substrate radially. CONSTITUTION:Upper and lower substrates 5 and 5' on which a transparent electrode is formed in a specific pattern shape are coated with oriented films 6 and 6'; the substrate 5 is rubbed concentrically and the substrate 5' is rubble radially. Then the substrates 5 and 5' are combined together so that their end parts are superposed one over another, and sealed with sealant 7. Further, liquid crystal material 7 is charged to obtain the liquid crystal panel with the good visual field direction.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an ultra-large liquid crystal panel with improved viewing angle characteristics.

[Description of prior art]

Generally used LCD panels are 90° twisted,
It is called an i'N-type liquid crystal panel.

The manufacturing method of this TN type liquid crystal panel will be explained based on the drawings. FIG. 1 is an explanatory view showing the lower substrate of the liquid crystal panel and the rubbing direction of the lower substrate.

This T'N type liquid crystal panel is coated with a unidirectional film.1. For example, the two substrates are subjected to a rubbing process in which the lower substrate and the lower substrate are rubbed with cotton cloth, chemical fiber, etc. in the direction of the arrow 1-2 (σ), for example. The two σ) substrates are placed facing each other at a predetermined distance to form a liquid crystal material. At this time, if a liquid crystal material to which a left-handed twist θ) chiral substance is added in advance, a 1′ N-type liquid crystal panel with a left-handed twist θ) of 90° can be produced. Note that the curved arrow 6 represents the twisting direction of the liquid crystal molecules from the upper substrate to the F substrate.
The TN type liquid crystal panel has a narrow viewing angle characteristic, and the direction in which the display can be seen well, that is, the good viewing direction is limited to the range where the arrow B is /J<approximately 90 degrees. For example, in the liquid crystal panel shown in FIG.

In this way, if the lower substrate and the lower substrate θ) rubbing treatment direction and twisting direction of the chiral material are specified.

This good viewing direction is limited, but when using this liquid crystal panel for small displays such as alarm clocks and clocks, the viewing position of the display is fixed, so sufficient observation is possible, and the display It functions as a vessel.

FIG. 2 is an explanatory diagram showing the ultra-large liquid crystal panel and the position of the observer's eyes. However, for example, when observing an ultra-large σ) liquid crystal panel from the front, if the good viewing direction is the so-called 6 o'clock direction, 10 and a half parts will be viewed from the good viewing direction, so it will look good. The half part is very difficult to see when viewed from the 12 o'clock direction, as it forms a dotted line. Therefore, it was necessary to move the head or move the eyes to a position where the patient could see better. As described above, among ultra-large liquid crystal panels, a normal TN type liquid crystal panel cannot be observed in its entirety at a glance.

[Object of the Invention] An object of the present invention is to provide an ultra-large liquid crystal panel with improved viewing angle characteristics so that the entire panel can be clearly observed at a glance.

[Embodiments of the invention]

Examples of the present invention will be described below based on the drawings.
If explain.

Embodiment 1 FIG. 3 is a sectional view showing the structure 6 of the liquid crystal panel Q) according to the present invention. Figure 4 (al + fb) is) 1 that I
-Basic Seno.

Lower substrate σ) This is an explanatory diagram showing the rubbing direction. Transparent electrodes are formed in a predetermined pattern shape (Also, alignment films 6 and 6 are applied to substrates 5-h, respectively. After that)
A rubbing process is performed in concentric circles as shown in FIG. 1al.

The lower substrate is rubbed radially at 13F5 as shown in FIG.
Connect the ends a-b-c and [I is so good] 11 times to the ends a-b-c and d of the board 5, respectively, 7.1 times, and seal with sealant 7. . Furthermore, by enclosing a liquid crystal substance 8, a liquid crystal panel as shown in FIG. 3 can be produced. If a left-handed chiral substance is added to the liquid crystal substance 8 in advance, the liquid crystal panel becomes a left-handed i'N type liquid crystal panel. Therefore, a liquid crystal panel with a good viewing direction as shown in FIG. 5 is obtained.

Example 2 The rubbing process method of Example 1 was changed and other processes were performed in the same manner. The upper substrate is rubbed in an outward radial direction as shown in FIG. The lower substrate is rubbed concentrically as shown in FIG. Then, the good viewing direction of the liquid crystal panel becomes the direction indicated by the arrow 4 in FIG. 6 at each portion.

Example 3 The upper substrate is rubbed concentrically in the carving direction as shown in FIG. Further, the lower substrate is also subjected to rubbing treatment in a radial manner as shown in FIG. Other steps are the same as in Example 1.

However, the amount of the chiral substance added to the liquid crystal substance is adjusted so that the inherent chiral rotation number of the liquid crystal substance to which the chiral substance is added is 3/4. Then, a TN-type liquid crystal panel with a left-handed twist of 270° is produced. [Effects of the Invention] When a liquid crystal panel is produced according to the present invention as described above,
In any case of the liquid crystal panel, the good viewing direction is approximately located near the center of the liquid crystal panel, so that the entire liquid crystal panel can be clearly observed at one time. In this way, an ultra-large liquid crystal panel with very good viewing angle characteristics can be manufactured.

[Brief explanation of the drawing]

Fig. 1 is an explanatory diagram showing the relationship between the rubbing direction of the substrate and the lower substrate - the twisting direction of the liquid crystal part and the good viewing direction in a conventional liquid crystal panel. and observer θ) is an explanatory diagram showing the position of the eyes. FIG. 3 is a sectional view showing the structure of a liquid crystal panel according to the present invention. FIG. 4 (aL fb) is an explanatory diagram showing the direction of coloring the upper and lower substrates of the liquid crystal panel according to the present invention. FIGS. 5, 6, and 7 are explanatory diagrams showing good viewing directions in various parts of the liquid crystal panel according to the present invention. 3... Twisting direction of liquid crystal molecules - 4... Good viewing direction -5... Two substrates -5.
...Lower board-10...Super large liquid crystal panel. Patent applicant: Citizen Jikyu Co., Ltd. (Riki III Figure 3, Figure 125-

Claims (1)

[Claims] An alignment film is provided on a substrate on which transparent electrodes are formed in a predetermined shape, a rubbing treatment is applied to the alignment film, the two substrates are stacked facing each other at a predetermined interval, and a liquid crystal is placed between the substrates. Enclose the substance 1. In the liquid crystal panel Q), one of the substrates has a rubbing treatment direction set concentrically, and the other substrate has a rubbing treatment direction set radially. LCD panel.