JPH08146440A - Liquid crystal display device and its prediction - Google Patents

Abstract

PURPOSE: To narrow non-effective display regions and to enable good display even if many pieces of liquid crystal display panels are lined up and used and even if a scroll is used by joining the ends of respective glass substrates in the connecting parts of the plural liquid crystal display panels in inclined shapes. CONSTITUTION: This liquid crystal display panels connected in plane arrangement are produced by combining and joining the respective liquid crystal display panels 1, 2 in such a manner that the diagonal parts of their ends overlap on each other above and below and fixing these panels to a printed circuit board, etc. The panels are joined in plane arrangement so as to overlap the diagonal parts on each other and the ends of the respective glass substrates 3a, 3b, 4a, 4b are joined in proximity until the respective sealing materials 6, 7 for adhering the respective liquid crystal display panels 1, 2 to be connected come into tight contact with each other and, therefore, the respective liquid crystal display panels, 1, 2 are connected by a narrow width and the non-effective display area is decreased. The continuous display is thus possible without interruption of the display screens even with the scroll display or the large-sized screen formed by arraying the many liquid crystal display panels.

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to a liquid crystal display panel and a method for manufacturing the same. More specifically, the present invention relates to a large display panel in which a large number of liquid crystal display panels are arranged, a liquid crystal display panel which can obtain beautiful display characteristics even in scroll display, and a manufacturing method thereof.

[0002]

2. Description of the Related Art In recent years, the use of liquid crystal display devices has been diversified as a display panel for displaying large areas indoors and outdoors, such as display of arrival and departure times at train stations and airports, destinations, and various advertisements. . These are for displaying characters and the like by a large number of display pixels, and when a large-sized display panel is configured by a liquid crystal display element, it is comparatively small in size of several cm to several tens of cm rather than being fitted with one liquid crystal display panel. This is because the product yield is improved by arranging a plurality of small liquid crystal display panels to display a large area due to warpage or the like. And, such a small-sized liquid crystal display panel is conventionally constructed by two glass substrates 12 each having a transparent electrode film formed thereon, as shown in FIG.
The glass substrates 12 and 12 are bonded to each other in the vicinity of the periphery of the glass substrates 12 and 12 at a narrow interval with a sealing material layer 14 interposed therebetween, and the space is filled with a liquid crystal material. This liquid crystal display panel is conventionally manufactured as follows. First, the unit area of the liquid crystal display panel 11 is formed on the facing surface of one glass substrate of a pair of large glass substrates on which a transparent electrode film is patterned for each unit area of the liquid crystal display panel 11 as shown in FIG. In each case, the sealing material layer 14 is formed by printing, for example, an epoxy resin over the entire circumference in the vicinity of the peripheral edge, leaving the filling port 13 portion of the liquid crystal material. Next, the large glass substrate is cut into each unit area of the liquid crystal display panel 11, and then a liquid crystal material is filled from each filling port 13. Finally, the filling port 13 is sealed with a sealing material 15 such as a UV-curable acrylic resin to complete the liquid crystal display panel 11 for each unit area. Note that FIG.
In, 16 is an electrode terminal.

[0003]

In the liquid crystal display panel 11, as shown in FIG. 3, due to the presence of the sealing material layer 14, a region having a width of δ from the edge of the liquid crystal display panel 11 becomes an ineffective display portion. . Then, in order to obtain the liquid crystal display panel 11 that displays one character of a desired size, the two large glass substrates of the pair are bonded together and then cut into an appropriate size. The section has a vertical cross section in the plate thickness direction, and the ineffective display section δ is the sealing material layer 1
4 is the width obtained by adding the distance between the glass cut portion and the sealing material layer 14 to the width of 4. FIG. 5 is a sectional view of an essential part of a conventional liquid crystal display device in which a plurality of the liquid crystal display panels 11 are arranged in a plane and connected to each other. The upper and lower two glass substrates 23a, 23b and 24a of the liquid crystal display panels 21 and 22 to be connected, respectively.
4b are sealed by sealing materials 26 and 27 at their peripheral portions via spacers (not shown), and the liquid crystal material 25 is filled in the gap. The length of the non-effective display portion δ of the liquid crystal display device having such a configuration is determined by the glass cutting portion of the connecting portion of the liquid crystal display panel and the sealing material 26.
Or it is represented by δ = λ + γ by the interval γ between the two.
Generally, the vertical and horizontal lengths are 100 mm and 100 mm, respectively.
In the case of a liquid crystal display panel having a size of about 1 mm, a cut margin of about 1 mm is required between the glass cutting portion and the sealing material 26 or 27 to withstand the impact when the large glass substrate is cut, and the sealing material 26 Since Nos. 27 and 27 are also formed by a printing method or the like, a width of about 2 mm is required, so that the ineffective display portion δ is at least about 3 to 4 mm. Therefore,
For example, as shown in FIG. 4, a plurality of liquid crystal display panels 11 are closely arranged in a horizontal direction to assemble a large liquid crystal display panel to display a large area, or scroll display is performed on the large liquid crystal display panel. When doing, there is a gap width α (≧ 2δ) between the effective display portions, so that characters are interrupted during scrolling or the screen is cut off, which makes it difficult to see. In particular, the scroll display makes it very difficult to see and cannot be used. Further, if the interval between the display pixels of the liquid crystal display panel is widened in accordance with the length of the gap width α, it becomes difficult to see the displayed characters and the like, and the display image quality deteriorates. The present invention has been made to solve the above problem, and by making the non-effective display region extremely narrow, it is possible to use a large number of liquid crystal display panels side by side or scroll. An object of the present invention is to provide a liquid crystal display panel capable of performing various displays.

[0004]

Means for Solving the Problems According to the present invention, a plurality of liquid crystal display panels in which two glass substrates are bonded to each other with a sealing material around the periphery and a liquid crystal material is filled between the two glass substrates are arranged in a plane. In the liquid crystal display device connected by the above, the end portions of the respective glass substrates in the connection portion of the plurality of liquid crystal display panels are obliquely joined to each other. Further, the present invention provides a liquid crystal display in which two glass substrates are adhered to each other by a sealing material, and a plurality of liquid crystal display panels filled with a liquid crystal material are planarly arranged and connected between the two glass substrates. In the device, the sealing agents in the connecting portions of the plurality of liquid crystal display panels are in close contact with each other and the end portions of the glass substrates are joined to each other. Further, according to the present invention, two glass substrates are adhered to each other by a sealing material, and liquid crystal material is filled between the two glass substrates. The liquid crystal display panel is cut into a shape, and the slanted portions of the end portions of the liquid crystal display panel are overlapped with each other, and a plurality of them are arranged in a plane and connected so as to be joined. Further, according to the present invention, two glass substrates are bonded to each other with a sealing material around the periphery, and a liquid crystal material is filled between the two glass substrates. It is characterized in that the glass substrate is cut substantially perpendicularly to the plate thickness direction until it is exposed, and a plurality of the liquid crystal display panels are arranged in a plane and connected so as to be joined.

[0005]

According to the present invention, of the adhesive parts around the two glass substrates in the liquid crystal display panel, at least each glass substrate of the adhesive part on the side to which the liquid crystal display panel is connected is cut into an oblique shape, Since the diagonal parts are arranged in a plane so that they overlap with each other and are bonded together, the ends of the glass substrates are bonded close to each other until the sealing materials that bond the liquid crystal display panels to be bonded are in close contact with each other. Therefore, each liquid crystal display panel is connected with a narrow width, and the non-effective display area around the liquid crystal display panel is significantly reduced. Therefore, the non-effective display area of the portion where the liquid crystal display panels are connected is reduced, and continuous display can be performed without interruption even on a scroll display or a large screen formed by arranging many liquid crystal display panels.

[0006]

EXAMPLES Next, a liquid crystal display device of the present invention will be described with reference to the accompanying drawings. FIG. 1 is a cross-sectional view of an essential part showing an embodiment of the liquid crystal display device of the present invention, and FIG. 2 is a partial plan view of a large screen of the liquid crystal display device according to the present invention. In FIG. 1, the upper and lower two glass substrates 3a, 3b, and 4a, 4b of the liquid crystal display panels 1, 2 to be connected are each provided with a seal member 6 at the peripheral portion via a spacer (not shown).
And 7 and the liquid crystal material 5 is filled in the gap. Although not shown, the glass substrate 3a,
Necessary electrodes, alignment films, etc. are formed at predetermined locations on the inner facing surfaces of 3b, 4a and 4b, and the liquid crystal display panels 1 and 2 are arranged in a plane and connected to each other to form a liquid crystal display device. . Such a liquid crystal display device is manufactured as follows. First, in order to produce a plurality of glass substrates for liquid crystal display panels by cutting the large glass substrate vertically and horizontally, transparent electrodes for each liquid crystal display panel are formed in a matrix on the large glass substrate by an ITO film or the like. Next, on each of the unit areas of each liquid crystal display panel except the liquid crystal filling port, on the opposite surface of one of the large glass substrates, after printing the epoxy resin or the like around the entire circumference to form a sealing material layer. A spacer is sandwiched between the large-sized glass substrates, the upper and lower electrode films of the large-sized glass substrates are aligned so that the upper and lower electrode films are aligned with each other, and the ends of the large-sized glass substrates are temporarily fixed. After that, the large glass substrates that are stacked are cut in the vertical or horizontal direction to obtain small liquid crystal display panels 1 and 2. Next, the liquid crystal display panels 1 and 2 are placed in a vacuum chamber, the space between the glass substrates 3a, 3b and 4a, 4b is evacuated to inject a liquid crystal material, and the inlet is sealed. After that, one of the liquid crystal display panels 1 bonded with a sealing material,
After sandwiching and fixing the upper and lower two glass substrates 3a and 3b with a jig (not shown) so as not to cause positional displacement,
The end portion on the side connected to the other liquid crystal display panel 2 is cut into an oblique shape and polished until just before touching one end of the sealing material 6. Similarly, the other liquid crystal display panel 2 is cut and polished in an oblique shape so that the end portion on the connection side with the one liquid crystal display panel 1 is symmetrical to that at the end portion of the one liquid crystal display panel 1. To do. Then, the liquid crystal display panels 1 and 2 are formed by attaching a polarizing plate to the outer surfaces of the glass substrates 3a, 3b and 4a, 4b. Lastly, as shown in FIG. 1, the liquid crystal display panels 1 and 2 are combined and joined so that the slanted portions of the end portions thereof are vertically overlapped with each other, and are joined to each other to be fixed to a print substrate (not shown), etc. A liquid crystal display panel that is arranged and connected is manufactured. In this case, the cutting angle in the plate thickness direction at the end of each glass substrate of the liquid crystal display panels 1 and 2 is, for example, 4
A gap width between the effective display portions when each liquid crystal display panel is connected by cutting each glass substrate so that the cut surface touches each end of the sealing materials 6 and 7 by adopting 5 ° β is β ≧ 2λ + D, which is the width λ of the sealing material and the projection width D from the end of the sealing material. Here, each glass substrate 3a and 3
If the distance between b and 4a and 4b is θ, then D = θtan 45 ° θtan 45 ° = D, so β
It is represented by ≧ 2λ + θ. On the other hand, when the liquid crystal display panels of the conventional liquid crystal display device shown in FIG. 5 are connected, the gap width α (≧ 2δ) between the effective display portions is α ≧ 2λ + 2γ
It is represented by. Generally, the distance θ between the glass substrates in the liquid crystal display panel is about 2 to 12 μm, and the distance γ between the glass cutting portion and the sealing material 26 or 27 is set to be extremely short compared to about 1 mm. (Γ >> θ),
In the case of the liquid crystal display device according to the present invention, the non-effective display width of the portion where the liquid crystal display panels are connected can be significantly reduced by the difference between the lengths of α and β, that is, 2γ−θ. Furthermore, the length from each glass substrate end of each glass substrate of the liquid crystal display panels 1 and 2 connected in the present invention to the end of the sealing material 6 and 7 is made perpendicular to the plate thickness direction of the glass substrate. After cutting and cutting off,
It is clear that when the liquid crystal display panels are connected to each other with the sealing materials 6 and 7 of the liquid crystal display panels 1 and 2 exposed by polishing, β ≧ 2λ and the non-display width is further shortened. . When a plurality of liquid crystal display panels connected in this way are arranged and used as a liquid crystal display device, as shown in FIG. 2, the width β of the ineffective display area of the connecting portion 8 between the liquid crystal display panels (≧ 2λ or 2
λ + θ is the width α (≧ 2λ + 2) of the conventional non-effective display area
Since it is significantly reduced compared to γ), a large display spanning a plurality of panels can be continuously and beautifully displayed without interruption of the display screen during the scroll even when scrolling. In addition, the width β of the non-effective display area of each display panel (pixel interval across the connecting portion) is set to the interval 1 between the display pixels 9 in the same display panel of the liquid crystal display device.
It can be equal to or close to zero. That is, the display quality can be further improved by narrowing the interval 10 between the display pixels 9 to enable continuous display of pixels. Further, a part of the light emitted from the backlight (not shown) arranged on the lower surface of the liquid crystal display panels 1 and 2 is between the sealing materials 6 and 7,
The remaining light is reflected by the oblique bonding surface 11 of each glass substrate, and the rest of the light is transmitted from the lower surface to the upper surface of the liquid crystal display panels 1 and 2. It is difficult to create shadows in the seam.

[0007]

According to the liquid crystal display device of the present invention, the non-effective display area around the connected liquid crystal display panels is extremely narrowed, so that (1) beautiful display can be achieved without a sense of discomfort even in a scroll display or a large screen. (2) Since the display pixel interval in each liquid crystal display panel can be reduced, the display image quality is significantly improved.

[Brief description of drawings]

FIG. 1 is a cross-sectional view of essential parts showing an embodiment of a liquid crystal display device of the present invention.

FIG. 2 is a partial plan view of a large screen of the liquid crystal display device according to the present invention.

FIG. 3 is a plan view showing an example of a conventional liquid crystal display panel.

FIG. 4 is a partial plan view of a large screen of a conventional liquid crystal display device.

FIG. 5 is a cross-sectional view of a main part of a conventional liquid crystal display device.

[Explanation of symbols]

 1, 2 Liquid crystal display panel 3, 4 Glass substrate 5 Liquid crystal material 6, 7 Sealing material 8 Liquid crystal display panel connecting portion 9 Display pixel 10 Display pixel spacing 11 Bonding surface α, β Ineffective display width λ Sealing material spacing θ Space between upper and lower glass substrates D Projection width

Claims (4)

[Claims] 1. A liquid crystal display device in which two glass substrates are adhered to each other by a sealing material, and a plurality of liquid crystal display panels filled with a liquid crystal material are arranged between the two glass substrates and are connected in a plane. 2. The liquid crystal display device according to claim 1, wherein the end portions of the glass substrates in the connection portion of the plurality of liquid crystal display panels are joined to each other in an oblique shape. 2. A liquid crystal display device in which two glass substrates are adhered to each other by a sealing material, and a plurality of liquid crystal display panels filled with a liquid crystal material are planarly arranged and connected between the two glass substrates. In the liquid crystal display device, the sealing agents in the connecting portions of the plurality of liquid crystal display panels are in close contact with each other and the end portions of the glass substrates are joined to each other. 3. An end portion of each glass substrate of a liquid crystal display panel in which two glass substrates are adhered to each other with a sealing material and a liquid crystal material is filled between the two glass substrates. A method for manufacturing a liquid crystal display device, wherein the liquid crystal display panel is cut into pieces, and the slanted portions of the end portions of the liquid crystal display panel are overlapped with each other, and a plurality of them are arranged in a plane to be joined together. 4. A sealing material exposes an end portion of each glass substrate of a liquid crystal display panel in which two glass substrates are adhered to each other with a sealing material, and a liquid crystal material is filled between the two glass substrates. Until then, a method for manufacturing a liquid crystal display device is characterized in that the glass substrate is cut substantially perpendicularly to the plate thickness direction, and a plurality of the liquid crystal display panels are arranged in a plane and connected so as to be joined.