JP2621787B2 - Manufacturing method of liquid crystal display - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for manufacturing a liquid crystal display having a polarizing ability using a flexible substrate.

[0002]

2. Description of the Related Art Attempts have been made to manufacture a lightweight, thin and flexible liquid crystal display using a thin plastic film of about 50 to 300 μm as a substrate material instead of a conventional liquid crystal display using a glass substrate.

A conventional twist-nematic liquid crystal display requires a liquid crystal cell composed of two substrates sandwiching a liquid crystal layer and polarizing plates above and below the liquid crystal cell. It is more preferable that the polarizing plate is fixed to the liquid crystal cell. It is easy to mount, and is usually attached to a liquid crystal cell using an acrylic adhesive or a silicone adhesive.

[0004]

However, when a polarizing plate is attached to a liquid crystal cell made of a plastic film substrate by such a method, the work becomes more difficult as the thinner polarizing plate is used, and the liquid crystal cell is broken at the time of attachment. There was a case.

Accordingly, the present invention has been made to solve the above problems, and an object of the present invention is to make it easy to attach a polarizing plate to a liquid crystal cell using a plastic substrate. .

[0006]

A first method of manufacturing a liquid crystal display according to the present invention comprises a step of combining a pair of substrates made of plastic so as to form a plurality of cells, and a step of combining the pair of substrates. on one side of the outer, advance one
A portion corresponding to a primary cutting portion of one of the substrates is cut, and a first polarizing plate having a size corresponding to a plurality of cells is attached.
And kicking process, on the other surface of the outer of said pair of substrates,
Attach a second polarizing plate of a size corresponding to multiple cells
And then cutting the pair of substrates at the same cutting point
And separating the cells into individual cells. The second method for manufacturing a liquid crystal display of the present invention comprises:
One consisting of plastic as to form a cell of the plurality min
The process of combining a pair of substrates and the pair of substrates combined
On one side of the outside of the
A portion corresponding to the cut portion is cut and the plurality of cells are cut.
Polarizing plate having a size corresponding to the above and including a reflecting plate
Adhering, and the other surface outside the pair of substrates
Above, a second polarizing plate of a size corresponding to a plurality of cells
Attaching the pair of substrates to the same
Cutting at the cutting point and separating into individual cells
It is characterized by that.

For such cutting, a method of cutting with a knife such as a knife, a method of shearing cutting, a method of extracting with a press, a laser cutting method, or the like can be used.

The polarizing plate is formed by dyeing polyvinyl alcohol with iodine or a dichroic dye and coating it with a sandwich or an acrylic resin with cellulose triacetate.
１８０180 μm, and this is adhered using an acrylic adhesive or a silicone adhesive. The polarizing plate attached to the common electrode substrate side may have an aluminum-based reflecting plate.

[0009]

According to the first aspect of the present invention, a plastic substrate on which a large number of electrodes are formed is assembled, and a polarizing plate is attached to the plastic substrate at the same time, and then divided into individual cells. A large number of liquid crystal displays can be manufactured.

Further, in order to expose the terminal portion of the liquid crystal display, one side of the common electrode substrate facing the terminal portion of the segment electrode substrate is cut in advance (this step is referred to as a primary cutting step). After a large number of polarizing plates are simultaneously attached to the substrate, the substrate is cut alone (this cutting step is referred to as a secondary cutting step). At this time, it is necessary that the polarizing plate, which is cut at a portion corresponding to the primary cut portion, is positioned and bonded so that the primary cut portion coincides.

[0011]

【Example】

[Embodiment 1] FIG. 1 shows a layout of an electrode pattern of this embodiment.

As a substrate 1 made of a plastic film, a polyethersulfone film having a thickness of 100 μm and a size of 20 cm square is used, and indium tin oxide as a transparent conductive film 2 is formed to a thickness of 500 ° by a low-temperature sputtering method. did. Next, common electrodes were formed on the common-side substrate shown in FIG. 1A and the same number of segment electrodes were formed on the segment-side substrate shown in FIG. 1B by photolithography. Further, a primary cutting portion 3 shown in FIG. 1B was cut by a cutting blade. Next, an orientation agent 8 was applied to both substrates, baked, and then rubbed in a predetermined direction with gauze to perform an orientation treatment. Next, an epoxy-based sealant 6 was screen-printed, and after conducting a vertical conduction process, a gap agent 7 made of glass fiber fine powder was sprayed on the surface.
After combining both substrates, the sealant was cured by heating. For these liquid crystal cells assembled at the same time,
As shown in FIG. 2, the upper polarizing plate 9 and the primary
After attaching the lower polarizing plate 10 from which the part corresponding to 1 was cut, the whole was cut at the secondary cutting part 12 and separated into single cells. Liquid crystal was vacuum-injected into this, the injection port was sealed with an epoxy-based adhesive, and an aluminum reflector was attached below the panel to complete the liquid crystal display.

[Embodiment 2] In the same manner as in Embodiment 1, a plurality of liquid crystal cells assembled at the same time were cut at the upper polarizing plate 18 and the portion which coincides with the primary cutting portion 20 in advance as shown in FIG. After attaching the lower polarizing plate 19 with an aluminum reflector, the whole was cut at a secondary cutting portion 21 to separate the cell into single cells. Liquid crystal was injected into this in vacuum, and the injection port was sealed with an epoxy-based adhesive to complete a liquid crystal display.

[0014] Similar to Example 3 Example 1, to the liquid crystal cell assembled large number at the same time, then pasted many upper polarizer 27 as shown in FIG. 4 pieces simultaneously, aluminum reflections have been pre-cut The lower polarizing plate with plate 28 was attached, and the whole was cut at the secondary cutting portion 30 to separate the cell into single cells. Liquid crystal is vacuum injected into this,
The injection port was sealed with an epoxy adhesive to complete the liquid crystal display.

Example 4 In the same manner as in Example 1, a polyether sulfone film having a transparent conductive film formed thereon was used.
As shown in FIGS. 5A and 5B, a pattern in which the common electrode and the segment electrode were continuous in one substrate was formed by photolithography. Further, the substrate 3 of FIG.
One primary cut 33 was cut with a cutting blade. After assembling them in the same manner, after attaching the upper polarizing plate 39 and the lower polarizing plate 40 whose portions corresponding to the primary cutting portions 33 have been cut in advance as shown in FIG.
Cut. Liquid crystal was injected into this, the injection port was sealed, and an aluminum reflector was attached below the panel to complete the liquid crystal display.

Embodiment 5 As shown in FIGS. 7A and 7B, a common electrode and a segment electrode were formed. Next, after the primary cutting portion 45 in FIG. 7 was cut, it was assembled similarly. Next, as shown in FIG. 8, the upper polarizing plate 51 and the lower polarizing plate 52, whose portions corresponding to the primary cutting portions 45 were cut, were pasted as shown in FIG.

Embodiment 6 As shown in FIGS. 9A and 9B, a common electrode and a segment electrode were formed on a substrate 55. Next, after the primary cutting portion 57 in FIG. 9 was cut, it was assembled in the same manner. Next, first cut 57
The upper polarizing plate 63 and the lower polarizing plate 6 whose portions corresponding to
4 was cut as shown in FIG.

[0018]

As described above, according to the present invention, it is easy to attach a polarizing plate to a liquid crystal cell using a plastic substrate, and there is an advantage that the manufacturing cost can be reduced. In particular, since the portion corresponding to the primary cutting portion of the substrate of one polarizing plate corresponding to a plurality of pieces is cut in advance, it can be separated into individual cells only by the secondary cutting process. Ma
In addition, a pair of substrates are cut at the same
The end on the side where a single cell terminal is not formed because it is separated
Flat surface makes it compact and easy to incorporate into equipment
Structure.

[Brief description of the drawings]

FIG. 1 is a diagram showing an electrode pattern according to an embodiment of the present invention.

FIG. 2 is an essential part cross-sectional view showing the liquid crystal display of the first embodiment.

FIG. 3 is a sectional view of a main part showing a liquid crystal display according to a second embodiment.

FIG. 4 is an essential part cross-sectional view showing a liquid crystal display according to a third embodiment.

FIG. 5 is a diagram showing an electrode pattern according to a fourth embodiment.

FIG. 6 is an essential part cross-sectional view showing a liquid crystal display of Example 4.

FIG. 7 is a diagram showing an electrode pattern according to a fifth embodiment.

FIG. 8 is a sectional view of a main part showing a liquid crystal display according to a fifth embodiment.

FIG. 9 is a diagram showing an electrode pattern according to a sixth embodiment.

FIG. 10 is a cross-sectional view of a principal part showing a liquid crystal display according to a sixth embodiment.

[Explanation of symbols]

 1. Substrate 2. 2. transparent conductive film Primary cutting point 4. Substrate 5. Terminal part 6. Sealant 7. 7. Gap agent Alignment film 9. Upper polarizing plate 10. Lower polarizing plate 11. Primary cutting point 12. Secondary cut 13. Substrate 14. Terminal part 15. Sealant 16. Gap agent 17. Alignment film 18. Upper polarizing plate 19. Lower polarizing plate 20. Primary cutting point 21. Secondary cutting point 22. Substrate 23. Terminal part 24. Sealant 25. Gap agent 26. Alignment film 27. Upper polarizing plate 28. Lower polarizing plate 29. Primary cutting point 30. Secondary cutting point 31. Substrate 32. Transparent conductive film 33. Primary cutting point 34. Substrate 35. Electrode 36. Sealant 37. Gap agent 38. Alignment film 39. Upper polarizing plate 40. Lower polarizing plate 41. Primary cutting point 42. Secondary cutting point 43. Substrate 44. Transparent conductive film 45. Primary cutting point 46. Substrate 47. Terminal part 48. Sealant 49. Primary cutting point 50. Alignment film 51. Upper polarizing plate 52. Lower polarizing plate 53. Primary cutting point 54. Secondary cutting point 55. Substrate 56. Transparent conductive film 57. Primary cutting point 58. Substrate 59. Terminal electrode 60. Sealant 61. Gap agent 62. Alignment film 63. Upper polarizing plate 64. Lower polarizing plate 65. Primary cutting point 66. Secondary cutting point

Claims (2)

(57) [Claims] 1. A step of combining a pair of substrates made of plastic so as to form a plurality of cells, and corresponding to a primary cut portion of one of the substrates in advance on one of the outer surfaces of the pair of substrates. and Keru paste the magnitude first polarizing plate of step portions correspond to and the plurality of cells is cut to, on the other surface of the outer of said pair of substrates, a plurality of cells
A step of attaching a second polarizing plate having a size corresponding to the above , and a step of subsequently cutting the pair of substrates at the same cutting location and separating them into individual cells. Of manufacturing liquid crystal display. 2. A plastic so as to form a plurality of cells.
A step of combining a pair of substrates consisting of
The part corresponding to the primary cut of one substrate is cut
And a reflector having a size corresponding to the plurality of cells.
Attaching a first polarizing plate comprising: a plurality of cells on the other surface outside the pair of substrates;
Adhering a second polarizing plate having a size corresponding to the above , and then cutting the pair of substrates at the same
Separating the liquid into various cells.
Method of manufacturing crystal display.