JP2917387B2 - Manufacturing method of liquid crystal element - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for manufacturing a liquid crystal device, and more particularly to a method for performing seal printing by superimposing two substrates with high accuracy.

[Conventional technology]

Liquid crystal devices are currently widely used in liquid crystal TVs and the like, and research and development are being vigorously conducted for downsizing and high definition. In order to realize compactness and high definition without changing the substrate size, it is necessary to make the image display area as large as possible within the substrate. Therefore, in sticker printing for overlapping two substrates, a high-precision positioning is required because the seal does not overlap the display area and does not overlap the scribe line at the time of cutting. As shown in FIG. 4, the conventional seal printing method includes a stage 6 for adsorbing a substrate and a substrate fixture 5 for fixing the substrate, and a screen 2 for printing a seal is installed on the upper part thereof. In the figure, reference numeral 16 denotes an adjusting screw. The position of the substrate on the stage 6 is fixed by the substrate fixing device 5 and sucked, and a seal is printed by a screen printing method. Further, at that time, in the seal heating and firing after the liquid crystal element is overlapped, based on the dimensions of the outer shape of the substrate so that the seal portion does not overlap the scribe line 17 and the pixel region 13 shown in FIG.
This was done in consideration of the machine accuracy of the printing press, the work accuracy, the seal width, etc. In the figure, 9 is a peripheral seal, 10 is an auxiliary seal, 11 is a cutting marker, and 12 is a liquid crystal injection port.

[Problems to be solved by the invention]

In conventional seal printing, printing is performed in consideration of the mechanical accuracy of the printing machine, the work accuracy, the seal width after firing the seal, and the like, based on the dimensions of the outer shape of the substrate. However, the conventional printing method has a disadvantage that it takes time to position the seal printing. In addition, if the printing position is shifted, the seal is applied to the scribe line 17 and a cutting failure occurs, or the sealing is applied to the pixel region 13 to cause a display failure.

An object of the present invention is to provide a method of manufacturing a liquid crystal device that solves the above-mentioned problems.

[Means for solving the problem]

In order to achieve the above object, a method of manufacturing a liquid crystal element according to the present invention is a method of manufacturing a liquid crystal element having a structure sandwiched between two substrates having electrodes, wherein a seal printing is performed on at least one of the substrates. A laser marker is inserted into the sealing plate, and the substrate is irradiated with laser light through a transmission port having the same diameter as the marker, and the laser beam is radiated through a transmission hole provided on the stage and having a diameter larger than the diameter of the marker. The amount of light blocked by the marker of the laser beam is detected by the light receiver, and the position of the seal printing is determined at a position where the amount of transmission received by the light receiver is minimized.

[Action]

The sealing plate, the stage, the substrate, and the like are moved so that the marker formed on the substrate blocks laser light and the like, and screen printing is positioned when the amount of transmission received by the light receiver is minimized.

〔Example〕

 Next, the present invention will be described with reference to the drawings.

(Embodiment 1) FIG. 1 is a schematic view showing a seal printing method according to Embodiment 1 of the present invention, and FIG. 2 is a plan view of a substrate on which a seal printing marker is inserted. 2, reference numeral 9 denotes a peripheral seal, 10 denotes an auxiliary seal, 11 denotes a cutting marker, 12 denotes a liquid crystal injection port, 13 denotes a pixel area, and 17 denotes a scribe line.

Referring to FIG. 1, the present invention relates to a method of manufacturing a liquid crystal device having a structure in which a liquid crystal is sandwiched between two substrates having electrodes.
The position of the seal printing is determined. That is, the laser light emitted from the laser light oscillator 1
The position of the laser light oscillator 1 is determined so as to pass through the laser transmission port 3 having a diameter of 1.0 mm formed in the optical receiver 8 and enter the light receiver 8. 14 is a squeegee. Next, a substrate O which has been subjected to rubbing treatment by applying polyimide as an alignment film is adsorbed and fixed on the stage 6. On the substrate O, a seal printing marker 4 having a diameter of 1.0 mm is formed of a chrome film outside the cutting marker 11. The laser beam that has passed through the laser transmission port 3 of the seal plate 2 is blocked by the marker 4 for seal printing, and is input to the light receiver 8. The stage 6 is moved and positioned by the movement adjuster 15 so that the output of the light receiver 8 is minimized, and a seal pattern is printed on the substrate O by a screen printing method. Although a large number of liquid crystal elements were manufactured by this method, the seal did not overlap the scribe line 17 or the pixel region 13 even after the seal was fired, and no cutting failure or display failure occurred.

The positioning of the seal printing according to the configuration of the present invention can be performed by fixing the sledge 6 and moving the substrate fixture 5 by the movement adjuster 15 to determine the position of the substrate O.

(Example 2) Fig. 3 is a schematic view showing Example 2 of the present invention.

In the figure, a laser beam emitted from a laser beam oscillator 1 passes through a laser transmission opening 3 having a diameter of 1.0 mm on which a sealing plate 2 is formed and enters a light receiver 8 so that the laser beam oscillator 1 emits laser light.
Determine the position of. Next, a substrate O coated with polyimide as an alignment film and subjected to a rubbing treatment is adsorbed and fixed on the stage 6. On the substrate O, a seal printing marker 4 having a diameter of 1.0 mm is formed of a chrome film outside the cutting marker 11 shown in FIG. The laser beam that has passed through the laser transmission light 3 of the seal plate 2 is shielded by the marker 4 for seal printing and is input to the light receiver 8. The laser light oscillator 1 and the seal plate 2 are moved in parallel by the movement adjuster 15 so that the output of the light receiver 8 is minimized, and positioning is performed. A seal pattern is printed on the substrate O by a screen printing method. Although a large number of liquid crystal elements were manufactured by this method, the seal did not overlap the scribe line 17 or the pixel region 13 even after the seal was fired, and no cutting failure or display failure occurred.

〔The invention's effect〕

As described above, according to the present invention, the marker diameter of the substrate and the transmission aperture of the sealing plate have the same diameter, and the laser beam is applied to the marker through the seal transmission aperture, and is larger than both diameters. Since the light enters the light receiver via the laser transmission hole of the stage and determines the optimum position of the seal printing, the accuracy of the positioning of the seal printing can be improved.

Further, since a marker for sticker printing is formed on the substrate and the amount of light transmitted from the periphery of the marker is detected, the optimum position for sticker printing is determined.
Accuracy of positioning for sticker printing has been improved, and the time required for several tens of minutes has been reduced to several seconds, and the problem that the seal is applied to the scribe line or the pixel area after manufacturing the liquid crystal element has been eliminated, resulting in poor cutting. No display failure occurs, and the yield is improved.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a schematic view showing a first embodiment of the present invention, FIG. 2 is a plan view showing screen printing of the first and second embodiments, and FIG. 3 is a second embodiment of the present invention. FIG. 4 is a schematic view showing general screen printing, and FIG. 5 is a plan view showing general screen printing. DESCRIPTION OF SYMBOLS 1 ... Laser light oscillator 4 ... Marker for printing a seal 5 ... Board fixing device, 8 ... Light receiver 9 ... Peripheral seal, 15 ... Movement adjuster 16 ... Adjustment screw, 17 ... Scribe line

Claims (1)

(57) [Claims] 1. A method for manufacturing a liquid crystal element having a structure sandwiched between two substrates having electrodes, wherein a marker for sealing printing is inserted on at least one of the substrates, and the marker is provided on a sealing plate. The substrate is irradiated with laser light through a transmission opening having the same diameter as the diameter of the laser beam, and the amount of light blocked by the marker by the marker is detected by a light receiver through a transmission hole provided on the stage and having a diameter larger than that of the marker. A method of manufacturing a liquid crystal element, wherein the position of the seal printing is determined at a position where the amount of transmission received by the light receiver is minimized.