JP2600197B2 - Liquid crystal injection method - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a liquid crystal injection method for injecting liquid crystal between upper and lower substrates of a liquid crystal panel.

2. Description of the Related Art Conventionally, as a method of injecting liquid crystal between upper and lower substrates of a liquid crystal panel, a method shown in FIG. 5 has been adopted. While keeping in a vacuum atmosphere, the inside of the empty panel 12 is evacuated and bubbles in the liquid crystal 7 are removed. Then empty panel
12 is immersed in the liquid crystal 7, and the inside of the vacuum device is brought to atmospheric pressure. As a result, the liquid crystal 7 is injected into the empty panel 12 by the force of the atmospheric pressure. This method is performed by arranging several pieces cut into one panel in parallel. A method of cutting a large substrate after injecting liquid crystal into a large-sized multi-piece substrate having a plurality of electrode substrates is called substrate transport. And it is desired from rationalization of a manufacturing process.

Problems to be Solved by the Invention In the injection method as described above, the injection port is not aligned with a large-sized large-sized substrate, so that it is difficult to inject the liquid crystal before cutting.

The present invention provides a liquid crystal injection method that enables a large number of liquid crystals to be injected in a state of such a large substrate and that can be cut into a predetermined panel after the liquid crystal injection.

Means for Solving the Problems In order to solve the above problems, the present invention provides a first and a second liquid crystal reservoir for each injection port of a large-sized multi-piece substrate having a plurality of electrode substrates. The liquid crystal is supplied to the first liquid crystal reservoir, the liquid crystal is moved to the second liquid crystal reservoir, and the injection port is immersed in the liquid crystal.

Function The present invention has the above-described configuration, and by arranging independent boats at each injection port of a large-sized substrate, a collective liquid crystal injection method can be performed. After defoaming, the liquid crystal is moved to the second liquid crystal reservoir, so that the injection port is immersed in the liquid crystal and injection is performed, and the evacuation in the gap can be performed smoothly. Next, after sufficiently evacuating them, the large substrate 1 and the boat 4 are rotated in the direction of arrow 9 in the vacuum state,
The liquid crystal 7 is moved to the second liquid crystal storage 6. Thus, the injection port 3 is immersed in the liquid crystal 7. Thereafter, the liquid crystal 7 is pressed to the atmospheric pressure by releasing the vacuum state to the atmospheric pressure, and is injected into the gap from the injection port 3. After the injection, the injection port 3 from which the boat 4 has been detached is sealed to complete the injection step. Next, as a means for bringing the boat 4 into contact with the large substrate 1, the large substrate 1 of the boat 4 will be described.
A groove 10 is provided on the contact side. If the operation of contacting the boat 4 with the large-sized substrate 1 is performed in a vacuum state, when the vacuum state is released and the groove 10 is exposed to the atmospheric pressure, the groove 10 remains in the vacuum state. Thus, the boat 4 is always attracted to the large-sized substrate 1. From this, a mechanism for pressing the boat 4 is unnecessary under the atmospheric pressure after the injection, and the configuration can be simplified. When removing the boat 4 from the large substrate 1,
The boat 4 is made of an elastic body.

Embodiment An embodiment of the present invention will be described below with reference to FIGS.
A small substrate 2 cut into a predetermined shape is bonded to a large substrate 1 having a plurality of (four in FIG. 1) patterns with a predetermined gap. The boat 4 is brought into contact with each of the injection ports 3 of the large-sized substrate 1. The boat 4 is provided with a first liquid crystal reservoir 5 and a second liquid crystal reservoir 6, and the first liquid crystal reservoir 5 is formed in a bag shape. By rotating the large-sized substrate 1 and the boat 4, the liquid crystal can be moved to the first liquid crystal reservoir and the second liquid crystal reservoir. Next, a step of injecting the liquid crystal 7 into the gap will be described. The large substrate 1 is held in the posture shown in FIG. 1, and supplies the liquid crystal 7 from the pipe 8 to the first liquid crystal storage 5. Thereafter, in the state where the posture is maintained, the entire large substrate 1 is placed in a vacuum, the inside of the gap is evacuated, and the liquid crystal 7 supplied to the first liquid crystal reservoir 5 is supplied.
Degas. At this time, since the injection port 3 and the first liquid crystal reservoir are located at a distance from each other, it is difficult for the liquid crystal 7 to block the injection port 3.
The end of the boat 4 can be easily removed by peeling or straining the boat 4 to bring the groove 10 to atmospheric pressure.

Effects of the Invention As described above, according to the present invention, even in the case of a large-sized multi-piece substrate, by moving the liquid crystal during defoaming and injection,
Stable injection without bubbles can be performed, and the supply amount of the liquid crystal may be only an appropriate amount according to each panel, so that there is no waste. Therefore, rationalization of multi-cavity can be achieved.

[Brief description of the drawings]

FIG. 1 is a front view of a liquid crystal injection method according to one embodiment of the present invention at the time of supplying liquid crystal, FIG.
FIG. 3 is a perspective view of a main part of the method, FIG. 4 is a perspective view of a main part of another embodiment of the method, and FIG. 5 is a perspective view of a conventional method. 1 large substrate, 2 small substrate, 3 injection port, 4
Boat 5... First liquid crystal reservoir 6... Second liquid crystal reservoir 7.

Claims (2)

(57) [Claims] 1. A method for injecting liquid crystal in a liquid crystal injecting port of two electrode substrates having a predetermined gap in a vacuum and filling the liquid crystal between the gaps by atmospheric pressure. A boat having first and second liquid crystal reservoirs is arranged for each of the injection ports of a large-sized multi-piece substrate having: a liquid crystal is supplied to the first liquid crystal reservoir; A liquid crystal injection method comprising moving liquid crystal to a liquid crystal reservoir and immersing the injection port in the liquid crystal. 2. The liquid crystal injection method according to claim 1, wherein a groove is provided on the substrate contact side of the boat.