JPH0533132U - Liquid crystal cell manufacturing equipment - Google Patents

Abstract

(57) [Abstract] [Purpose] The present invention is intended for an apparatus for manufacturing a liquid crystal cell without variations in color tone and display characteristics in the cell. [Structure] An upper substrate 1 having transparent electrodes 2 and 21 and a lower substrate 11 are opposed to each other with a gap control material 3 at a predetermined interval, and the periphery is sealed with a sealing material 4, and a liquid crystal 5 is injected. , Pressing the upper and lower substrates from the outside
In the device for manufacturing a liquid crystal cell, which is sandwiched between the press plates and left standing while applying a predetermined pressure, the press plate 6,
61 is characterized in that the convex portions 62 and 63 are provided only in the portion corresponding to the display area D.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to an apparatus for manufacturing a liquid crystal cell used in a liquid crystal display device.

[0002]

[Prior Art]

 In the conventional manufacturing apparatus of this type, as shown in FIG. 2, an upper substrate 1 and a lower substrate 11 having transparent electrodes 2 and 21 of a predetermined width inside are opposed to each other with a gap control material 3 therebetween at a predetermined interval. After sealing the periphery with the sealing material 4 and injecting the liquid crystal 5, in order to obtain the cell gap defined by the diameter of the gap control material 3 in the entire area in the cell, two liquid crystal cells are provided above and below. It is sandwiched between flat plates 6 and, while applying an appropriate pressure 7, it is left for 1 to 2 hours to release excess liquid crystal, then the injection port is sealed, and pressure is applied to all points of the upper and lower base plates 1 and 11. Are manufactured.

[0003]

[Problems to be solved by the device]

 However, in the above-mentioned conventional technique, A. When pressure is applied, unevenness corresponding to the thickness of the electrode is generated, and at the same time, the electrode-less portion 8 bends due to external pressure as shown by the broken line. There is a problem that it becomes thin. In particular, the thicker the electrode becomes, the more remarkable it becomes.

B. Further, there is a problem that the cell color, threshold voltage, etc. of the display portion 9 are different from those of the other portions. In particular, it is remarkable in STN.

C. Further, there is a problem that the display quality of the liquid crystal cell is impaired.

D. Since the substrate is in contact with the gap control material over the entire area of the liquid crystal cell, there is a problem in that, at low temperatures, air bubble roots generated by contraction of the liquid crystal tend to appear.

Therefore, the present invention has been devised in view of the problems of the above-mentioned conventional techniques, and an object thereof is to provide an apparatus for manufacturing a liquid crystal cell without variations in color tone and display characteristics in the cell.

[0008]

[Means for Solving the Problems]

 In order to achieve the above object, in the liquid crystal cell manufacturing apparatus of the present invention, the upper substrate and the lower substrate having transparent electrodes are opposed to each other with a gap control material at a predetermined interval, and the periphery is sealed with a sealing material. In a liquid crystal cell manufacturing apparatus in which liquid crystal is injected, liquid crystal is injected, the upper and lower base plates are sandwiched from the outside by a press plate, and the injection port is sealed after being left under a predetermined pressure, the press plate corresponds to the display area. The feature is that only the portion to be formed has a convex portion.

Further, it is characterized in that a flat plate having the same size as the display area is used instead of the press plate provided with the convex portion.

Furthermore, at least the thickness of the electrode is 500 or more.

[0011]

【Example】

 An embodiment will be described with reference to FIG. 1. An apparatus for manufacturing a liquid crystal cell according to the present invention comprises an upper substrate 2 having portions 8 having transparent electrodes 2 and 21 at both ends thereof. The lower substrate 21 and the lower substrate 21 are opposed to each other at a predetermined distance via the gap control material 3, the periphery is sealed with the sealing material 4, the liquid crystal 5 is injected, and two upper and lower presses are pressed from the outside of the substrate. It is sandwiched between the plates 6 and 61, left standing while applying a predetermined pressure 7, and then the injection port (not shown) is sealed.

Further, the upper and lower press plates 6 and 61 are provided with convex portions 62 and 63 only in a portion corresponding to the display area D regardless of a material such as a hard plate or a soft plate.

When a pressure 7 is applied only to a necessary portion of the press plates 6 or 61 or when the cell size is large and pressing is performed one by one, instead of the press plates 6 and 61, a display area D and Pressure 7 is applied using a flat press plate of the same size.

The pressure 7 applied to the press plates 6 and 61 is appropriately in the range of 5 g / cm 2 to 500 g / cm 2.

The thickness of the transparent electrodes 2 and 21 of the present invention is more effective when the thickness is 500 or more.

[0016]

[Effect of the device]

 Since the present invention is configured as described above, it has the following effects. A. Even if unevenness corresponding to the thickness of the electrode occurs when pressure is applied, external pressure is not applied to the part without electrodes, so the cell gap in the display area close to it can be made the same gap as other display areas. ..

B. In addition, a display device without variations in color tone and display characteristics in the cell can be manufactured, and a liquid crystal cell with high display quality can be manufactured.

C. When exposed to a low temperature, liquid crystal shrinkage can be absorbed by the part without electrodes, so that the generation of bubbles at a low temperature can be prevented.

[Brief description of drawings]

FIG. 1 is a structural diagram of a liquid crystal cell manufacturing apparatus of the present invention.

FIG. 2 is a structural diagram of a conventional liquid crystal cell manufacturing apparatus.

[Explanation of symbols]

 1 Upper Substrate 11 Lower Substrate 2 Electrode 21 Electrode 3 Gap Control Material 4 Sealing Material 5 Liquid Crystal 6 Press Plate 61 Press Plate D Display Area

Claims (1)

[Scope of utility model registration request] 1. An upper substrate and a lower substrate having transparent electrodes,
After facing each other with a gap control material at a predetermined interval and sealing the periphery with a sealing material and injecting liquid crystal, the upper and lower substrates are sandwiched by a press plate from the outside, and after leaving a predetermined pressure, the injection port is left. The manufacturing apparatus of a liquid crystal cell to be sealed, wherein the press plate is provided with a convex portion only in a portion corresponding to a display region.