JPH0250129A - Manufacture of liquid crystal panel - Google Patents

Abstract

PURPOSE:To reduce a light leak and to prevent the display quality from deteriorating by sticking spacers on the light shield part of a substrate. CONSTITUTION:A mask 4 is formed by forming round or rectangular opening parts 4a in a thin plate by electroforming, etching, etc., in conformity with the pattern of the light shield part 3. The mask 4 is placed on the substrate 1 and then positioned so that the light shield part 3 meets the opening part 4a. While they are pressed by a coating tool in this state, the spacers 5 are moved as shown by an arrow A and then the mask 4 is removed, thereby obtaining the substrate 1 where the spacers 5 are stuck selectively on the light shield part 3. Consequently, the spacers are stuck on the light shield part and not present at a display picture element part, so the transmission of light by the spacers is eliminated and there is no influence of light scattering due to a difference in refractive index from liquid crystal, so as excellent display image is obtained.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a method of manufacturing a liquid crystal panel, and more particularly to a method of manufacturing a liquid crystal panel in which the distance between substrates is controlled by interposing spacers.

BACKGROUND OF THE INVENTION In a conventional method for manufacturing a liquid crystal panel, a spacer is attached to the entire surface of one of a pair of substrates, and then the spacer is bonded under pressure at the periphery of the spacer, thereby manufacturing a liquid crystal panel.

Problems to be Solved by the Invention However, in the above configuration, even when the liquid crystal blocks light, there is a spacer attached to the display pixel part of the substrate, so this spacer transmits light and the display is interrupted. There was a problem that the quality deteriorated.

The present invention solves the above problems and provides a method for manufacturing a liquid crystal panel in which a spacer is attached to a light-shielding portion of a substrate and a display image with less light leakage can be obtained.

Means for Solving the Problems In order to solve the above-mentioned problems, the present invention selectively attaches spacers to the light-shielding portion of a substrate. To selectively attach spacers, a mask having an opening is placed on the substrate and the spacers are attached to the light shielding portion of the substrate. A method of attaching a spacer through an opening, a method of attaching a spacer to a contact jig equipped with a protrusion, a method of stacking and pressing the spacer on a substrate and transferring the spacer to a light shielding part, or a method of attaching a spacer to a contact jig equipped with a groove. A preferred method is to use a tool to stack the spacer on a substrate with spacers attached to the entire surface, and then transfer the spacer to a contact jig so that it remains in the light-shielding part.

Effect With the above configuration, the spacer adheres to the light shielding part and there is no spacer in the display pixel part, so there is no light transmission through the spacer, and there is no effect of light scattering due to the difference in refractive index from the liquid crystal. A good display image can be obtained.

A method for manufacturing a liquid crystal panel according to a first embodiment of the present invention using an embodiment mask will be explained with reference to FIGS. 1(a) to 1(C).

FIG. 1(a) is a sectional view showing the state before the mask 4 is placed on the substrate 1 and the spacer 5 is attached by the squeegee 8, and FIG. 1(b) is a sectional view showing the substrate 1 after the mask 4 is removed. A cross-sectional view showing the adhesion state of the upper spacer 5, FIG.
) is a plan view showing the same adhesion state.

The substrate 1 has a pixel section 2 and a light shielding section 3 formed on its surface. The mask 4 of this embodiment is a thin plate that is electroformed, etched, etc. in accordance with the pattern of the light shielding portion 3 described above, and has a plurality of round or square openings 4a. After placing the mask 4 on the substrate 1, positioning is performed so that the light shielding portion 3 and the opening 4a are aligned. Next, in this state, the spacer 5 is moved in the direction of arrow A while being pressed with an applicator such as a squeegee 8 used in screen printing, and the mask 4 is removed.
A substrate 1 having spacers 5 selectively attached thereto can be obtained.

Further, in this embodiment, the spacer 5 is attached while the mask 4 and the substrate 1 are in contact with each other, but the spacer 5 is attached with the mask 4 and the substrate 1 in contact with each other. The same result can be obtained by drawing the spacer 5 in the opening 4a of the mask 4 toward the substrate and selectively attaching it to the light shielding part 3.

Furthermore, the first
As shown in Figure (c), it can also be attached to the vertical and horizontal intersections of the light shielding part 3.

Next, a method for manufacturing a liquid crystal panel according to a second embodiment of the present invention using a convex contact jig will be described in FIGS. 2(a) to 2(c).
).

Fig. 2(a) shows a convex contact jig 6 with a spacer 5 attached.
2(b) is a cross-sectional view showing a state in which the convex contact jig 6 to which the spacer 5 is attached is stacked on the substrate 1.
Figure (c) is a plan view showing how the spacer 5 is attached when the convex contact jig 6 is removed.

First, the convex contact jig 6 is placed with the protrusion 6a facing upward, and the spacers 5 are scattered and adhered thereto. Next, the convex contact jig 6 is turned upside down, positioned so that its protrusion 6a is aligned with the light shielding part 3, and placed on the substrate 1.

Next, when the convex contact jig 6 is removed, the substrate 1 with the spacers 5 selectively attached only to the light shielding portion 3 is obtained.

Furthermore, by providing the projections 6a of the convex contact jig 6 at the intersections of the light shielding parts 3, the contact jig 6 can be attached to the vertical and horizontal intersections of the light shielding parts 3, as shown in FIG. 2(C). You can also do it.

Next, a method for manufacturing a liquid crystal panel according to a third embodiment of the present invention using a concave contact jig is shown in FIGS. 3(a) to 3(C).
This is explained by:

FIG. 3(a) is a sectional view showing a state in which spacers 5 are attached to the entire surface of a substrate 1 by a conventional dispersion method, FIG. 3(b) is a sectional view showing a state in which concave contact jigs 7 are stacked, Figure 3 (C)
2 is a sectional view showing the state of the substrate 1 with the contact jig 7 removed. FIG.

First, spacers 5 are scattered on the surface of the substrate 1 and adhered to the entire surface, resulting in the state shown in FIG. 3(a). Next, a concave contact jig 7 having a groove 7a corresponding to the light shielding part 3 is overlapped. At this time, positioning is performed so that the groove 7a of the concave contact jig 7 and the light shielding part 3 of the substrate 1 are aligned. Next, when the concave contact jig 7 is removed, the spacer of the pixel portion 2 is removed, and the spacer 5 can be selectively left only in the light shielding portion 3.

The present invention can be configured in various embodiments other than those shown above. For example, in the above embodiment, only the method for manufacturing a liquid crystal panel was described, but in a panel configured to hold a pair of substrates at a predetermined distance, spacers are attached to preset positions on the substrates, such as liquid crystal shutters and liquid crystal panels. The present invention can also be applied to mirrors and the like.

As described in detail, according to the present invention, the spacer can be attached only to the light shielding part with a simple configuration, so that when the liquid crystal is blocking light, the spacer attached to the pixel part can be removed. This eliminates light leakage and greatly improves display quality.

[Brief explanation of the drawing]

1(a), (b)m are for explaining the method for manufacturing a liquid crystal panel in the third embodiment of the liquid crystal panel in the second embodiment of the present invention. FIG. 112. Substrate, 2. ,, pixel section, 314. Light shielding part, 4.
,. Mask, 4a... Opening, 5... Spacer, 6...
- Convex soft contact jig, 8a... protrusion, 7... concave contact jig, 7a... groove, 8... squeegee. Name of agent: Patent attorney Shigetaka Awano (1 person) Figure 1 Figure 1

Claims (5)

[Claims] (1) In a method for manufacturing a liquid crystal panel comprising the steps of arranging a spacer between a pair of opposing substrates and holding the pair of substrates at a predetermined distance, the step of attaching the spacer to the light shielding part A method for manufacturing a liquid crystal panel, comprising: (2) A mask having an opening corresponding to the light shielding part is installed on the substrate, and the spacer is attached to the light shielding part by pushing the spacer on the upper surface side of the mask to the substrate side through the opening. A manufacturing method for liquid crystal panels. (3) A mask having an opening corresponding to the light shielding part is installed on the substrate, and the spacer is attached to the light shielding part by drawing the spacer on the upper surface side of the mask from the substrate side through the opening. A manufacturing method for liquid crystal panels. (4) Attach the spacer to a contact jig equipped with a protrusion corresponding to the light-shielding part, and stack it on the substrate so that the light-shielding part and the protrusion match. A method for manufacturing a liquid crystal panel characterized by transferring. (5) After attaching the spacer to the entire surface of the substrate, a contact jig with a groove corresponding to the light shielding part is superimposed on the spacer, and the spacer other than the light shielding part is transferred to the contact jig and removed. Characteristics of the manufacturing method for liquid crystal panels.