JPH0194319A - Spacer material dispersing device for liquid crystal display panel - Google Patents

Abstract

PURPOSE:To stably and uniformly disperse a spacer material to a liquid crystal display panel substrate by sticking the spacer material onto the substrate while rotating a tray on which one or plural liquid crystal display panel substrates are placed. CONSTITUTION:A spacer material 4 is dried or mixed with a solvent and sprayed into a cylindrical vessel 2 from a nozzle 1 together with compressed gas, and a tray 3 on the bottom of the vessel on which substrates 5 are placed is rotated with the center of the vessel as the axis to deposit and stick the spacer material 4. When the moving speed of substrates 5 is high, deposition of the spacer material 4 in the vessel 2 is disturbed and the quantity of the spacer material 4 stuck to substrates 5 is reduced to degrade the dispersion efficiency; and therefore, the moving speed of substrates 5 is set to <=20cm/sec not to degrade the dispersion efficiency. Thus, the dispersion density of the spacer material 4 on respective substrates 5 is averaged to obtain uniform and stable substrates free from the variance of dispersion density.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention provides a gap between the upper and lower substrates of a liquid crystal display panel for liquid crystal to enter, so that the dispersion of a spacer material into the upper and lower substrates is stabilized before the upper and lower substrates are bonded together. The present invention relates to an apparatus for uniformly dispersing spacer materials in liquid crystal display panels.

Conventional technology In general, in order to create a gap between the upper and lower substrates in a liquid crystal display panel for the liquid crystal to enter, cylindrical or spherical glass or resin is dispersed on one substrate as a spacer material before the upper and lower substrates are pasted together. . - A diagram of the principle of a spacer material dispersion device for boat fishing is shown in Fig. 5. This is equipped with a nozzle 1 for spraying spacer material 4, a container 2, and a tray 3 at the bottom of the container. When the spacer material 4 settles and adheres to the substrate 5 placed on the tray 3 at the bottom of the container, the tray 3 and the substrate 5 It is left still.

Problems to be Solved by the Invention Such conventional spacer material dispersing devices have the following problems. The distribution density of the spacer material 4 sprayed inside the container 2 often differs depending on the location due to uneven mixing when the compressed gas and the spacer material 4 are sprayed by the nozzle 1 or deviations in the spray direction of the nozzle 1. , tray 3 at the bottom of the container
The spacer material 4 settles and adheres to the substrate 5 placed thereon with an uneven distribution. This causes variations in the distribution density of the spacer material on the substrate 5 depending on the installation location. If the dispersion density is smaller than the set value, the thickness of the liquid crystal layer between the upper and lower substrates of the liquid crystal display panel becomes smaller, resulting in a decrease in contrast, and if the dispersion density is larger than the set value,
Contrast is reduced because the black level is reduced due to light passing through the spacer material. The present invention has been made in view of the above problems, and an object of the present invention is to provide an apparatus that stably and uniformly disperses a spacer material onto a liquid crystal display panel substrate.

Means for Solving the Problems In order to solve the above problems, the present invention provides means for dispersing spacer material into the container using compressed gas, a tray for placing a liquid crystal display panel substrate on the bottom of the container, and the tray. The spacer material is attached onto the substrate while rotating the tray on which one or more liquid crystal display panel substrates are placed.

Effect of the present invention By using the method described above, even if the distribution density of the spacer material dispersed in the container differs depending on the location, the spacer material on each substrate can be fixed by depositing the spacer material while moving the liquid crystal display panel substrate. The dispersion density is averaged, and the spacer material can be stably and uniformly dispersed onto the liquid crystal display panel substrate.

Example Examples will be specifically described below with reference to the drawings.

FIG. 1 shows a first embodiment of the invention. In this embodiment, a spacer material 4 is sprayed from a nozzle 1 in a dry state or mixed with a solvent into a cylindrical container 2 together with compressed gas, and a tray 3 at the bottom of the container on which a substrate 5 is placed is sprayed into the container. The spacer material 4 is sedimented and attached while rotating around the center. Note that if the moving speed of the substrate 5 is high, the sedimentation of the spacer material 4 in the container 2 will be disturbed, and the substrate 5 will be moved at a high speed.
The amount of spacer material 4 that adheres thereto is small, resulting in poor dispersion efficiency. From experiments, the rotational speed of the substrate 5 is set to 20 CoI/11 eC or less, at which the dispersion efficiency does not decrease.

Furthermore, if the surface of the tray 3 has large irregularities, the rotation of the tray 3 will generate airflow, which may cause uneven distribution of the spacer material 4 on the substrate 5. Therefore, the surface shape of the tray 3 may be It must be a flat surface with few irregularities. According to the above device, even if the distribution density of the spacer material 4 sprayed from the nozzle 1 into the container 2 varies depending on the location,
By depositing the spacer material 4 while moving the substrate 5, the dispersion density of the spacer material 4 on each substrate 5 is averaged, and a uniform and stable substrate without unevenness in dispersion density can be efficiently obtained.

FIG. 2 shows a second embodiment of the invention. In this embodiment, the substrates 5 are placed on the same circumference around the rotation axis of the tray 3 in the first embodiment.

According to this, even if the distribution density of the spacer material 4 sprayed from the nozzle l is different between the vicinity of the center in the container 2 and the periphery, since each substrate 5 follows the same trajectory, the spacer material on each substrate 5 The dispersion density of the material 4 is averaged, and a uniform and stable substrate without uneven dispersion density can be obtained. Also,
In this configuration, since the substrate 5 is placed on the periphery of the tray 3, automated placement from the outside is easy.

FIG. 3 shows a third embodiment of the invention. In this embodiment, in the second embodiment, a mechanism for rotating each substrate 5 one by one is further provided on the same circumference centered on the rotation axis of the tray 3, so that the tray 3 is rotated and each substrate 5 is rotated. It also rotates on the same circumference. This configuration can be achieved, for example, by installing the gear 6 as shown in FIG.
It can be easily combined with a mechanism for rotating the tray 3. Note that the ratio of the number of rotations of the tray 3 to the number of rotations of each substrate 5 is not an integral multiple so that the mounting direction of the substrate 5 is different for each rotation of the tray 3. according to this,
Even if the distribution density of the spacer material 4 sprayed from the nozzle 1 in the container 2 differs between the vicinity of the center and the periphery, the distribution density of the spacer material 4 on each substrate 5 is averaged, and the distribution density within one substrate is The dispersion density of the spacer material 4 is also made uniform, and it is possible to obtain a highly accurate substrate in which the dispersion density of the spacer material 4 is locally uniform and stable. This is a very effective means for uniformizing the spacer material on large substrates as liquid crystal display panels become larger in the future.

Effects of the Invention As described above, according to the present invention, a simple device can disperse a spacer material onto a liquid crystal display panel substrate.
It can be carried out with uniform and stable density. Therefore, the present invention is extremely effective in realizing an inexpensive liquid crystal display panel with good quality and high production yield, since it is possible to prevent a decrease in contrast caused by the dispersion density of the spacer material being out of the set value.

[Brief explanation of the drawing]

FIG. 1 is a schematic diagram of a spacer material dispersing device for a liquid crystal display panel according to a first embodiment of the present invention, and FIG. 2 is a schematic diagram of a spacer material dispersing device for a liquid crystal display panel according to a second embodiment of the present invention. 3 is a schematic diagram of a spacer material dispersion device for a liquid crystal display panel in the third embodiment, FIG. 4 is a sectional view of the tray portion of the spacer material dispersion device for a liquid crystal display panel in the third embodiment, and FIG. 5 1 is a principle diagram of a conventional general spacer material dispersion device for a liquid crystal display panel. ■... Nozzle, 2... Container, 3... Tray, 4...
... Spacer material, 5... Board, name of agent Patent attorney Toshio Nakao and one other person Figure 1 6X 2 Figure 2 6X slope Figure 3 5 board 4 Ritsu

Claims (3)

[Claims] (1) A means for dispersing a spacer material into the container using compressed gas, a tray for placing a liquid crystal display panel substrate at the bottom of the container, and a mechanism for rotating the tray, and one or more liquid crystal display panels. A spacer material dispersing device for a liquid crystal display panel, wherein the spacer material is attached onto the substrate while rotating the tray on which the substrate is placed. (2) placing one or more liquid crystal display panel substrates on the same circumference on a liquid crystal display panel substrate mounting tray;
2. The spacer material dispersion device for a liquid crystal display panel according to claim 1, wherein the spacer material is attached onto the substrate while rotating the tray. (3) The spacer material is attached to the substrate while the liquid crystal display panel substrate is rotated along a central axis different from the central axis of rotation of the tray as the tray for placing the liquid crystal display panel substrate is rotated. A spacer material dispersion device for a liquid crystal display panel as described in scope 1.