WO2007108244A1

WO2007108244A1 - Display panel, polarization plate to be adhered on such display panel and display device using such display panel and polarization plate

Info

Publication number: WO2007108244A1
Application number: PCT/JP2007/052250
Authority: WO
Inventors: Chikanori Tsukamura; Shinya Tanaka; Hajime Imai; Yoshiharu Kataoka
Original assignee: Sharp Kabushiki Kaisha
Priority date: 2006-03-17
Filing date: 2007-02-08
Publication date: 2007-09-27

Abstract

In a liquid crystal display panel (1), at least the liquid crystal display panel (1) or a polarization plate (2) has an irregular planar shape other than a rectangular shape, and on an alignment film, a second alignment mark (3) is formed as a bonding mark for bonding the display panel on the polarization plate (2) by aligning the mark with a first alignment mark (4), which is arranged on the polarization plate (2) as a bonding mark. Thus, the display panel is accurately bonded on the polarization plate.

Description

Display panel, polarizing plate attached to the display panel, and display device using the same Technical Field

TECHNICAL FIELD [0001] The present invention relates to a display panel, a polarizing plate attached to the display panel, and a display device using the same, and particularly relates to a display panel and a polarizing plate having an irregular shape. Background art

In a general liquid crystal display device, a liquid crystal is sandwiched between two liquid crystal display panels having a substrate force on which an alignment film is formed, and a polarizing plate is bonded to the outside of these liquid crystal display panels. ing.

[0003] The polarizing plate has a role of changing natural light into polarized light, divides the light incident on the polarizing plate into orthogonally polarized components, allows only one to pass, and absorbs the other polarized component. Whether or not the polarizing plate can be accurately bonded to the liquid crystal display panel is important because it relates to the optical characteristics of the liquid crystal display device.

[0004] Patent Documents 1 and 3 disclose a technique in which alignment marks for alignment are provided on each of a liquid crystal panel and a polarizing plate. Patent Document 2 discloses a technique for bonding a liquid crystal substrate and a polarizing plate so that the alignment axis direction of the liquid crystal substrate matches the transmission axis direction of the color filter polarizing plate. RU

Patent Document 1: Japanese Patent Publication “JP 2001-125092 (Publication Date: May 11, 2001)”

Patent Document 2: Japanese Patent Publication Gazette “Japanese Unexamined Patent Publication No. 2003-107452 (Publication Date: April 9, 2003)”

Patent Document 3: Japanese Patent Publication “JP 2005-266284 (Publication Date: September 29, 2005)”

Disclosure of the invention

However, when the planar shape of the liquid crystal display panel and the polarizing plate is an irregular shape other than a rectangular shape, the positions of the liquid crystal display panel and the polarizing plate such as four corners, short sides, and long sides Alignment, that is, only alignment marks with a mark that aligns the alignment axis with the polarization axis. It becomes a mark for aligning the liquid crystal display panel and the polarizing plate. Therefore, bonding with alignment marks with higher accuracy than before is required. However, the specialized technology for aligning irregularly shaped liquid crystal display panels and polarizing plates is a specialized technology.

The above-mentioned patent documents 1 to 3 do not exist in the prior art.

[0006] The present invention has been made in view of the above-described problems, and an object of the present invention is to provide a display panel, a polarizing plate, and the like, in which an irregularly shaped display panel and a polarizing plate are bonded together with high accuracy. It is to provide a display device.

[0007] In order to solve the above problems, a display panel according to the present invention comprises a substrate and a plate-like alignment means provided on the substrate, and is bonded to a polarizing plate to form a display device. In the display panel to be formed, at least one of the display panel and the polarizing plate has a non-rectangular planar shape, and the first polarizing plate is provided on the polarizing plate as a mark for bonding. It is characterized in that a second alignment mark is formed as a bonding mark, which is aligned with the alignment mark and bonded to the polarizing plate.

Here, the display panel refers to an object to which a polarizing plate is bonded in the process of manufacturing a display device. According to the above configuration, the planar shape of at least one of the display panel and the polarizing plate is an irregular shape other than a rectangle, and the first alignment mark is provided on the display panel as a mark for bonding. A second alignment mark is provided as a mark for alignment with the polarizing plate. Therefore, by aligning the second alignment mark and the second alignment mark with each other, only the second alignment mark can be used as a mark, and the first alignment mark can be used as a bonding mark. The accuracy of alignment between the polarizing plate provided with and the display panel can be increased.

[0009] In addition, in order to solve the above problems, a display panel according to the present invention includes a substrate and a polarizing plate having a polarization axis, which is provided on the substrate and includes a plate-like alignment unit having an alignment axis. In a display panel that forms a display device by bonding, the planar shape of at least one of the display panel and the polarizing plate is an irregular shape other than a rectangle, and the polarizing plate is used as a mark for bonding. By aligning with the first alignment mark provided on the plate and pasting it with the polarizing plate, the direction of the orientation axis and the polarization A second alignment mark is formed as a mark of bonding so that it matches the direction of the axis. /

Here, the display panel refers to an object to which a polarizing plate is attached in the process of manufacturing a display device. In addition, the direction of the alignment axis matches the direction of the polarization axis includes not only the case where the direction of the alignment axis and the direction of the polarization axis match, but also the case where the directions of each other have a predetermined relationship. According to the above configuration, the planar shape of at least one of the display panel and the polarizing plate is an irregular shape other than a rectangle, and the second alignment mark as a mark for alignment with the display panel Is provided. Further, the second alignment mark is aligned with the first alignment mark as a bonding mark provided on the polarizing plate, whereby the orientation axis direction and the polarization axis direction are aligned. It is formed to match.

[0011] Therefore, even if the planar shape of the display panel is irregular, high accuracy can be obtained simply by aligning the second alignment mark with the first alignment mark provided on the polarizing plate. Can be pasted together.

In addition, in order to solve the above-described problem, the polarizing plate according to the present invention is bonded to a display panel including a substrate and a flat plate-like orientation unit provided on the substrate, whereby the display device is bonded. In the polarizing plate to be formed, at least one of the plane shapes of the display panel and the polarizing plate is an irregular shape other than a rectangle, and a second shape provided in the orientation means as a mark for bonding. The first alignment mark is formed as a mark for bonding, which is aligned with the alignment mark and bonded to the display panel.

Here, the display panel refers to an object to which a polarizing plate is attached in the process of manufacturing a display device. According to the above configuration, the planar shape of at least one of the display panel and the polarizing plate is an irregular shape other than a rectangle, and the first alignment mark is provided as a mark for alignment on the polarizing plate. ing. Therefore, the polarizing plate can be aligned with the display panel provided with the second alignment mark as a mark for bonding, with only the first alignment mark as a mark, with high accuracy. .

[0014] In addition, the polarizing plate of the present invention is provided with a substrate and the substrate in order to solve the above-described problems. In a flat polarizing plate having a polarizing axis, a display device is formed by laminating with a display panel having a flat alignment means having an alignment axis, and at least one of the display panel and the polarizing plate. One of the planar shapes is an irregular shape other than a rectangle, and is aligned with the second alignment mark provided in the alignment means as a mark for bonding, and bonded to the display panel, thereby The first alignment mark as a mark for bonding is formed so that the direction of the alignment axis matches the direction of the polarization axis.

Here, the display panel refers to an object to which a polarizing plate is attached in the process of manufacturing a display device. In addition, the direction of the alignment axis matches the direction of the polarization axis includes not only the case where the direction of the alignment axis and the direction of the polarization axis match, but also the case where the directions of each other have a predetermined relationship. According to the above configuration, the planar shape of at least one of the display panel and the polarizing plate is an irregular shape other than a rectangle, and the first alignment mark is provided as a mark for alignment on the polarizing plate. ing. Further, the first alignment mark is aligned with the second alignment mark as a bonding mark provided on the display panel, whereby the orientation axis direction and the polarization axis direction are aligned. It is formed to match.

[0016] Therefore, even if the planar shape of the polarizing plate is irregular, it is only necessary to align the first alignment mark with the second alignment mark provided on the display panel. High, can be bonded.

[0017] Further, in order to solve the above-described problem, a display device according to the present invention includes a display panel including a substrate, a flat plate-like alignment unit provided on the substrate, and a polarizing plate. In the display device, the planar shape of at least one of the display panel and the polarizing plate is an irregular shape other than a rectangle, and the display panel has a second shape as a mark for bonding to the polarizing plate. While the alignment mark is provided, the polarizing plate is provided with a first alignment mark as a mark for bonding to the display panel.

Here, the display panel refers to an object to which a polarizing plate is attached in the process of manufacturing a display device. According to the above configuration, at least one of the display panel and the polarizing plate One of the planar shapes is an irregular shape other than a rectangle, and a second alignment mark and a first alignment mark are provided as alignment marks on the display panel and the polarizing plate. Therefore, the display panel and the polarizing plate can be aligned with high accuracy using only the second alignment mark and the first alignment mark as marks.

[0019] In order to solve the above problems, a display device of the present invention includes a display panel including a substrate and flat alignment means provided on the substrate and having an alignment axis, and a polarization having a polarization axis. In the display device formed by laminating the optical plate, the plane shape of at least one of the display panel and the polarizing plate is an irregular shape other than a rectangle, and the alignment axis direction is obtained by aligning each other. Is aligned with the direction of the polarization axis, the display panel is provided with a second alignment mark as a mark for bonding with the polarizing plate, while the polarizing plate is connected to the display panel. A first alignment mark is provided as a mark for bonding, and is characterized in that.

[0020] Here, the display panel refers to an object to which a polarizing plate is attached in the process of manufacturing a display device. In addition, the direction of the alignment axis matches the direction of the polarization axis includes not only the case where the direction of the alignment axis and the direction of the polarization axis match, but also the case where the directions of each other have a predetermined relationship. According to the above configuration, the planar shape of at least one of the display panel and the polarizing plate is an irregular shape other than a rectangle, and the second key as a mark for alignment with the display panel and the polarizing plate is used. The alignment mark and the first alignment mark are provided. Further, the second alignment mark is aligned with the first alignment mark as a mark of bonding provided on the polarizing plate, whereby the orientation axis direction and the polarization axis direction are aligned. It is formed to match.

[0021] Therefore, even if the planar shape of the display panel is irregular, high accuracy can be obtained simply by aligning the second alignment mark with the first alignment mark provided on the polarizing plate. Can be pasted together.

[0022] Other objects, features, and advantages of the present invention will be sufficiently understood from the following description. The advantages of the present invention will be apparent from the following description with reference to the accompanying drawings. Brief Description of Drawings

FIG. 1 is a schematic plan view showing a liquid crystal display panel and a polarizing plate according to an embodiment of the present invention.

FIG. 2 is a schematic cross-sectional view showing a liquid crystal display device of an embodiment of the present invention.

3 is a block diagram showing a manufacturing process for manufacturing the liquid crystal display device shown in FIG. 2. FIG.

4 is a schematic cross-sectional view showing the structure of the polarizing plate with retardation shown in FIG.

FIG. 5 is a schematic plan view showing a modification of the liquid crystal display panel and the polarizing plate shown in FIG.

FIG. 6 is a schematic plan view showing a further modification of the liquid crystal display panel and the polarizing plate shown in FIG.

FIG. 7 is a schematic plan view showing a further modification of the liquid crystal display panel and the polarizing plate shown in FIG.

FIG. 8 is a schematic plan view showing a further modification of the liquid crystal display panel and the polarizing plate shown in FIG.

Explanation of symbols

1 揿 (T 曰 Table No Nenore (Table No Nenore)

2 Polarizing plate

3 Second alignment mark

4 First alignment mark

6 Convex part (protrusion part)

7 Convex (protrusion)

8 Concave part (dent part)

9 Recessed part (recessed part)

12 First alignment film (alignment means)

13 Second alignment film (alignment means)

BEST MODE FOR CARRYING OUT THE INVENTION

[0025] An embodiment of the present invention will be described with reference to the drawings.

The liquid crystal display device of the present embodiment is used in, for example, a television, a mobile phone, a personal computer, and the like, and a liquid crystal display panel that sandwiches liquid crystal from both sides, and a polarization provided in each liquid crystal display panel And a board. The polarizing plate is vibrated in a predetermined direction. Has the role of creating moving light. In the present embodiment, the planar shape of the polarizing plate is substantially the same as the planar shape of the liquid crystal display panel. Note that in this specification, an object on which a polarizing plate is provided is referred to as a liquid crystal display panel. That is, the liquid crystal display panel refers to, for example, a substrate in which a transparent electrode or an alignment film is formed and a liquid crystal material is injected.

[Configuration of liquid crystal display device]

As shown in FIG. 2, the liquid crystal display device as the display device according to the present embodiment includes a TFT (Thin Film Transistor) substrate 10 and a CF substrate 11 which are arranged to face each other, and a CF of the TFT substrate 10. First alignment film (alignment means) 12 disposed on the surface facing the substrate 11 and second alignment film 12 (alignment means) disposed on the surface facing the TFT substrate of the CF substrate 11 1 And the first polarizing plate 14 disposed on the opposite side of the TFT substrate 10 to the surface facing the CF substrate 11 and the opposite side of the CF substrate 11 facing the surface facing the TFT substrate 10. The second polarizing plate 15, the liquid crystal 16 disposed between the first alignment film 12 and the second alignment film 13, the seal 17 that prevents the liquid crystal 16 from flowing out, the TFT substrate 10 and the CF And a spacer 18 for maintaining a constant distance from the substrate 11. In the above description, one substrate is the TFT substrate 10, but the switching element provided on the substrate is not limited to the TFT. Furthermore, although the other substrate is the CF substrate 11, the color filter (CF) may be provided on the side of the misaligned substrate!

[Manufacturing method of liquid crystal display device]

A method for manufacturing this liquid crystal display device will be described with reference to the block diagram shown in FIG. Note that, for convenience of explanation, the reference numerals used in FIG. 2 are used as they are for the constituent members used in the description of the method for manufacturing the liquid crystal display device.

[0027] First, two substrates (TFT substrate 10 and CF substrate 11) are prepared. Of these two substrates, one TFT substrate 10 is formed with TFTs serving as switching elements, source bus lines, and gate bus lines (Sl). In addition, a color filter and a counter electrode are formed on the other CF substrate 11 of the two substrates (S2). Note that either step S1 or step S2 may be performed first or simultaneously.

Next, an alignment film (the first alignment film 12 and the second alignment film 13) is formed on one side of each of the substrates 10 and 11, and alignment film treatment, that is, in a certain direction is performed. A rubbing process is performed (S3, S4). Such a fixed direction is called a rubbing direction (direction of the alignment axis). These arrangements When the liquid crystal 16 is arranged on the alignment films 12 and 13 subjected to the coating process, the major axis of the liquid crystal molecules becomes one in the rubbing direction.

[0029] Thereafter, the TFT substrate 10 and the CF substrate 11 are arranged at a predetermined interval so that the sides on which the first alignment film 12 and the second alignment film 13 are provided face each other. For example, a spherical spacer 18 that serves as a pillar is dispersed between the TFT substrate 10 and the CF substrate 11 to form a seal 17 that prevents the liquid crystal 16 to be sealed later from flowing out (S5). . Further, the TFT substrate 10 and the CF substrate 11 are bonded together (S6). The process so far uses large mother glass substrates as the TFT substrate 10 and the CF substrate 11, and then divides into a desired size to be used (S7). Then, the liquid crystal 16 is injected, and the injected liquid crystal 16 is sealed (S8, S9).

[0030] Further, polarizing plates (first polarizing plate 14 and second polarizing plate 15) are pasted on the opposite sides of the liquid crystal 16 on both the substrates 10 and 11, that is, on the outer side, respectively. (S10). In this specification, the object to which the polarizing plates 14 and 15 are attached is called a liquid crystal display panel. For example, in FIG. 2, the one having the TFT substrate 10 and the first alignment film 12 and the one having the CF substrate 11 and the second alignment film 13 are called liquid crystal display panels.

[0031] Next, a source driver and a gate driver (not shown) are connected to the TFT substrate 10 by an FPC (Flex¾le Printed circuit) (not shown) (SI 1). Finally, if necessary, a liquid crystal display device is completed by incorporating a backlight (not shown) (S12).

〔Polarizer〕

Next, the configuration of the above polarizing plates (first polarizing plate 14 and second polarizing plate 15) will be described. Note that the characteristic part of the present embodiment is that the first polarizing plate and the second polarizing plate can be handled in the same row, and therefore will be described simply as a polarizing plate in the following description.

As shown in FIG. 4, the polarizing plate is provided on the liquid crystal display panel 30, and in order from the liquid crystal display panel side, the adhesive layer 20, the retardation plate 21, the protective film 22, and the PVA polarizing plate. It has a film 23 and a protective film 24. The adhesive layer 20 has a role of attaching the polarizing plate itself to the liquid crystal display panel 30. However, the polarizing plate itself is attached to the liquid crystal display panel 30. The adhesive layer 20 is not limited as long as it can be attached. Further, the phase difference plate 21 has a role of improving the image quality and is not necessarily an essential component. That is, a polarizing plate without the retardation plate 21 is also included in the polarizing plate of the present embodiment. The protective films 22 and 24 are provided to increase the reliability of the polarizing plate.

[0033] The PVA polarizing film 23 has a transmission axis (polarization axis) and an absorption axis perpendicular to the transmission axis, and has a role of changing natural light into linearly polarized light. In this PVA polarizing film 23, an iodine compound such as a dye or a pigment is added to a polymer film of polyalcohol (Poly Vinyl Alcohol). It can produce | generate by extending | stretching. As a result, a film in which iodine molecules of the iodine compound are aligned in the stretched direction can be obtained. Directional force by which the iodine molecules are extended becomes the major axis (absorption axis) of the iodine molecules, and light parallel to the absorption axis is absorbed by the PVA polarizing film 23. On the other hand, the light in the direction (transmission axis, polarization axis) perpendicular to the major axis of iodine molecules passes through the PVA polarizing film 23. Therefore, only the light having a predetermined vibration direction (direction of the polarization axis) can be generated by the PVA polarizing film 24 prepared in this way, that is, natural light can be changed to linearly polarized light.

[Bonding of polarizing plate and liquid crystal display panel]

By the way, when the liquid crystal display panel and the polarizing plate are bonded together (S 10 in FIG. 3), the alignment axes of the alignment films (the first alignment film 12 and the second alignment film 13) provided on the liquid crystal display panel. The direction of rubbing (rubbing direction) and the direction of the polarization axis of the polarizing plate (direction of the transmission axis) must be matched. Thus, by matching the direction of the alignment axis of the alignment film with the direction of the polarization axis of the polarizing plate, high optical characteristics can be obtained. Note that the deviation between the direction of the alignment axis and the direction of the polarization axis of the polarizing plate changes the black and white transmittance, contrast, and Z, or the field of view range and the optimum viewing angle, resulting in a decrease in optical characteristics. To do.

Conventionally, the planar shapes of the liquid crystal display panel and the polarizing plate are both rectangular (square or rectangular), and when the liquid crystal display panel and the polarizing plate are bonded to each other, the liquid crystal display panel and the polarizing plate The alignment is performed based on the planar shape, and the alignment axis of the alignment film and the polarization axis of the polarizing plate can be aligned relatively easily. In other words, align the four corners, short sides, and long sides of the LCD panel and polarizing plate. By attaching, the alignment axis of the alignment film provided in the liquid crystal display panel and the polarization axis of the polarizing plate could be aligned. Therefore, the direction of the alignment axis of the alignment film provided in the liquid crystal display panel and the direction of the polarization axis of the polarizing plate can be easily matched. In addition, in some cases, alignment marks were provided at the four corners of the liquid crystal display panel and the polarizing plate in order to perform alignment more reliably.

However, in recent years, applications where liquid crystal display devices are used have expanded, and various types of liquid crystal display panels and polarizing plates have been developed according to these applications. In other words, liquid crystal display panels and polarizing plates having a planar shape other than a rectangular shape or any other irregular shape (including any shape other than a rectangular planar shape) have been used in liquid crystal display devices.

[0036] However, when the planar shape of the liquid crystal display panel and the polarizing plate is irregular, alignment of the liquid crystal display panel such as the four corners, the short side, and the long side of the rectangular shape is performed. That is, only the alignment mark that has a mark that matches the alignment axis and the polarization axis becomes a mark that matches the liquid crystal display panel and the polarizing plate. For this reason, bonding using alignment marks with higher accuracy than before is required. However, in order to align irregularly shaped liquid crystal display panels and polarizing plates, there have been conventional techniques for aligning alignment marks, alignment mark shapes, and alignment mark formation methods. I did not hesitate.

[0037] On the other hand, in the liquid crystal display panel and polarizing plate of the present embodiment, the liquid crystal display panel and polarizing plate are premised on irregular shapes, and the alignment marks provided on these are combined. When the alignment is performed, alignment marks are formed on the liquid crystal display panel and the polarizing plate so that the directions of the polarization axis and the alignment axis are aligned. In other words, alignment marks are provided in advance in the liquid crystal display panel and polarizing plate of the present embodiment so that the polarization axis and the alignment axis have a predetermined positional relationship.

[0038] Specifically, the case where the liquid crystal display panel and the polarizing plate are circular will be described with reference to the drawings. For example, as shown in FIG. 1, second alignment marks 3 are provided at substantially both ends of the diameter on the liquid crystal display panel 1, and the second alignment marks are provided at both ends of the diameter on the polarizing plate 3. A quadrangular first alignment mark 4 having substantially the same shape as the mark 3 is provided. These alignment marks 2 and 4 are aligned with the polarization axis of the polarizing plate 3 when the alignment marks 2 and 4 are combined and the liquid crystal display panel 1 and the polarizing plate 3 are bonded to each other. The direction is aligned with the direction of the alignment axis provided in the alignment film of the liquid crystal display panel 1. Thereby, even if the liquid crystal display panel 1 and the polarizing plate 3 have irregular shapes such as a circular shape, they can be aligned and bonded reliably. Note that “the polarization axis and the alignment axis are aligned” includes not only the case where the directions coincide, but also the case where the angles formed by these have a predetermined relationship. The liquid crystal display panel 1 is provided with a terminal 5 for providing an external driver (not shown).

Further, as shown in FIG. 1, when the liquid crystal display panel 1 and the polarizing plate 3 are circular, the second shape of the same shape is formed at both ends of the diameters of the respective circles of the liquid crystal display panel 1 and the polarizing plate 3. When the alignment mark 3 and the first alignment mark 4 are provided, that is, when the second alignment mark 3 and the first alignment mark 4 are provided rotationally symmetrically, the LCD panel is erroneously displayed. In contrast, the normal bonding position force may also be caused by rotating the polarizing plate 3 by 180 °. In this case, the direction of the polarization axis of the polarizing plate 3 and the direction of the alignment axis of the alignment film provided on the liquid crystal display panel 1 may be shifted by 180 °. When such a shift occurs, there arises a problem that the optical characteristics of the liquid crystal display device are deteriorated.

On the other hand, as shown in FIG. 5, the second alignment mark 3 provided on the liquid crystal display panel 1 and the first alignment mark 4 provided on the polarizing plate 2 rotate with respect to each other. It is preferable to provide it so that it is not symmetric (non-rotationally symmetric). Here, the second alignment mark 3 and the first alignment mark 4 are provided in a non-rotationally symmetrical manner. The second alignment mark 3 and the first alignment mark 4 are provided. Also consider the shape of each alignment mark 3 · 4 just by position. In other words, as shown in FIG. 6, even when the first alignment mark 3 and the first alignment mark 4 are provided at the same position as the alignment marks 3 and 4 in FIG. By providing different second alignment marks (triangular and quadrangular) 3 and providing first alignment marks 4 (also triangular and quadrangular) having different shapes on the polarizing plate 3, Alignment mark 3 and first alignment mark 4 are non-rotation symmetric with respect to each other.

[0041] In addition, if the second alignment mark 3 and the first alignment mark 4 are aligned and the liquid crystal display panel 1 and the polarizing plate 2 are bonded together, the alignment film (first The second alignment film 12 and the second alignment film 13; the alignment means) and the polarization axis of the polarizing plate 2 are aligned with each other. The alignment mark 3 is provided on the alignment film 13 of the liquid crystal display panel 1, while the first alignment mark 4 is provided on the polarizing plate 2. Note that the second alignment mark 3 on the liquid crystal display panel 1 is provided outside the active area, that is, outside the display area. Further, in the present embodiment, the force that the second alignment mark is provided on the alignment film of the liquid crystal display panel 1 is not limited to this. It may be installed.

[0042] As described above, the second alignment mark 3 and the first alignment mark 4 are provided in a non-rotationally symmetrical manner, for example, when the liquid crystal display panel 1 and the polarizing plate 2 are bonded together. Therefore, it is possible to prevent a problem that the bonding is performed with a relative shift of a predetermined angle. In the above description, the number of alignment marks is all two. However, the number of alignment marks provided on the liquid crystal display panel 1 and the polarizing plate 2 is not limited to two. It may be individual.

Further, in the present embodiment, the case where both the liquid crystal display panel 1 and the polarizing plate 2 have irregular shapes has been described. However, the alignment marks are arranged so that the relationship between the polarization axis and the alignment axis does not change from each other. Since the alignment can be performed, any one of the liquid crystal display panel 1 and the polarizing plate 2 may be an irregular shape.

[How to form alignment marks]

Next, a method for forming the alignment marks 3 and 4 provided on the liquid crystal display panel 1 and the polarizing plate 2 will be described.

[0044] The second alignment mark 3 provided on the liquid crystal display panel 1 can be formed of, for example, an insulating film or a metal film. In other words, it can be formed using an insulating film or wiring material when forming TFTs or electrodes as switching elements.

[0045] On the other hand, the first alignment mark 4 provided on the polarizing plate 2 is, for example, cut out or cut out a portion corresponding to the first alignment mark 4 in the polarizing plate 2 (the cut out portion). Can be formed by either removing the pigment (dye) doped in the PVA polarizing film 23 or removing the pigment. In any case, since light can be transmitted, the liquid crystal display panel 1 and the polarizing plate 2 are aligned at the position where the transmitted light is irradiated to the second alignment mark 3. LCD panel 1 and polarized light If the plate 2 is pasted together, the second alignment mark 3 and the first alignment mark 4 can be pasted together.

[0046] Another method for providing the first alignment mark 4 on the polarizing plate 2 is to cut out the first alignment mark 4 when the polarizing plate 2 is cut from a large size to a use size. And can be formed. In addition, the first alignment mark 4 may be formed before the polarizing plate 2 is cut from a large size to a use size. Further, the portion corresponding to the first alignment mark 4 may be protected in advance so as not to be doped with dyes or pigments. In addition, the PVA polarizing film may be pre-cured (coating) so that the dye or pigment does not penetrate.

Further, as shown in FIG. 7, the liquid crystal display panel 1 and the polarizing plate 2 are each provided with a protruding portion (convex portion) having a planar shape protruding as the second alignment mark 3 and the first alignment mark 4. ) By providing 6 · 7, these convex portions 6 · 7 can be used as marks for bonding the liquid crystal display panel 1 and the polarizing plate 2 together.

Further, as shown in FIG. 8, the liquid crystal display panel 1 and the polarizing plate 2 are each provided with a recessed portion (recessed portion; a planar shape) as a second alignment mark 3 and a first alignment mark 4. By providing the recesses 8 · 9, these recesses 8 · 9 can be used as marks for bonding the liquid crystal display panel 1 and the polarizing plate 2 together.

[0049] Note that the shape of the liquid crystal display panel and the polarizing plate of the present embodiment is not limited to a circular shape in the planar shape, and any shape may be used as long as the planar shape is not a rectangle (rectangle). Shape may be sufficient.

[0050] In the present invention, the alignment mark for attaching a polarizing plate may be provided on the panel. Also, a panel sticking alignment mark may be arranged on the polarizing plate. Further, as a panel alignment mark, a metal film or an insulating film may be provided. Furthermore, as a polarizing plate alignment mark, a portion for cutting or removing a pigment / pigment may be provided. Furthermore, as an alignment mark, a concave or convex portion may be provided on the panel and the polarizing plate. Conventionally, force deformed panels that are aligned by the sides of the panel and polarizing plate were inappropriate. On the other hand, in the present invention, alignment marks are provided on the panel and the polarizing plate to clarify the absorption axis direction of the polarizing plate and improve the accuracy of attaching the polarizing plate to the panel. Also on The alignment mark may be provided at a position that is not rotationally reversed. Thin film transistor (TFT) 'Markers may be created outside the display area of the panel using wiring materials or insulating films during electrode formation. Polarizer; cut out marker when cutting (to large size, use size). Markers may be printed before cutting. You can also protect and process the marker area so that it is not doped with dyes or pigments!

[0051] The present invention is not limited to the above-described embodiments, and various modifications are possible within the scope of the claims. That is, embodiments obtained by combining technical means appropriately modified within the scope of the claims are also included in the technical scope of the present invention.

[0052] In the display panel of the present invention, it is preferable that a plurality of the second alignment marks are provided so as to be non-rotation symmetric.

[0053] When a plurality of second alignment marks are provided, there may be two or more types of relative position patterns for alignment when the display panel and the polarizing plate are bonded to each other. In this case, simply aligning the second alignment mark with the first alignment mark does not necessarily result in a desired positional relationship between the desired display panel and the polarizing plate. In contrast, according to the above configuration, since the second alignment mark is provided on the display panel so as to be non-rotationally symmetric, the alignment between the display panel and the polarizing plate is desired. Positional force Force can be prevented from shifting.

[0054] In the display panel of the present invention, the second alignment mark is formed of a wiring material and Z or an insulating film used for forming a switching element and Z or an electrode formed on the substrate. I prefer that.

[0055] According to the above configuration, the second alignment mark is formed of the wiring material and / or the insulating film used for forming the switching element and / or the electrode formed on the substrate. Therefore, it is possible to form the second alignment mark without preparing another member in order to create the second alignment mark additionally. Therefore, the production efficiency can be increased.

[0056] Further, in the display panel of the present invention, it is preferable that the second alignment mark has a protruding portion force whose outer shape protrudes in the same planar shape as the first alignment mark. According to the said structure, alignment becomes easy. [0057] In the display panel of the present invention, it is preferable that the second alignment mark has a dent force with a recessed outer shape in the same planar shape as the first alignment mark. According to the said structure, alignment becomes easy.

[0058] In the display panel of the present invention, it is preferable that the planar shape is substantially circular as in the polarizing plate.

[0059] Further, in the polarizing plate of the present invention, it is preferable that a plurality of the first alignment marks are provided so as to be non-rotating symmetrical!

[0060] When a plurality of the first alignment marks are provided on the polarizing plate, there may be two or more types of patterns of relative positions for alignment when the display panel and the polarizing plate are bonded to each other. In this case, simply aligning the second alignment mark with the first alignment mark does not necessarily result in a desired positional relationship between the desired display panel and the polarizing plate. On the other hand, according to the above configuration, since the first alignment mark is provided on the polarizing plate so as to be non-rotationally symmetric, the alignment between the display panel and the polarizing plate is desired. It is possible to prevent deviation from the relationship.

[0061] In the polarizing plate of the present invention, it is preferable that the first alignment mark is a hollowed hole. According to the above configuration, the first alignment mark is a through hole. Therefore, the first alignment mark can transmit natural light and can be easily aligned with the display panel.

[0062] In the polarizing plate of the present invention, a dye or a pigment is added, and the first alignment mark is formed by removing the added one of the dye or the pigment. It is preferable. According to the above configuration, the added one of the dyes or pigments is removed and this portion is used as the first alignment mark. Therefore, since this portion transmits natural light, alignment with the display panel can be easily performed.

[0063] In the polarizing plate of the present invention, it is preferable that the first alignment mark is formed of a protruding portion having an outer shape protruding in the same planar shape as that of the second alignment mark. According to the said structure, alignment becomes easy.

[0064] In the polarizing plate of the present invention, it is preferable that the first alignment mark has a dent force with a concave outer shape in the same planar shape as the second alignment mark. Up According to the above configuration, the alignment becomes easy.

[0065] Further, in the polarizing plate of the present invention, it is preferable that the planar shape is substantially circular like the display panel.

[0066] In the display device of the present invention, it is preferable that a plurality of the second alignment marks are provided so as to be non-rotation symmetric.

[0067] When a plurality of second alignment marks are provided, there may be two or more types of relative position patterns for alignment when the display panel and the polarizing plate are bonded to each other. In this case, simply aligning the second alignment mark with the first alignment mark does not necessarily result in a desired positional relationship between the desired display panel and the polarizing plate. In contrast, according to the above configuration, since the second alignment mark is provided on the display panel so as to be non-rotationally symmetric, the alignment between the display panel and the polarizing plate is desired. Positional force Force can be prevented from shifting.

In the display device of the present invention, it is preferable that a plurality of the first alignment marks are provided so as to be non-rotationally symmetric.

[0069] When a plurality of the first alignment marks are provided on the polarizing plate, there may be two or more types of relative positional patterns when the display panel and the polarizing plate are bonded to each other. In this case, simply aligning the second alignment mark with the first alignment mark does not necessarily result in a desired positional relationship between the desired display panel and the polarizing plate. On the other hand, according to the above configuration, since the first alignment mark is provided on the polarizing plate so as to be non-rotationally symmetric, the alignment between the display panel and the polarizing plate is desired. It is possible to prevent deviation from the relationship.

In the display device of the present invention, the second alignment mark is formed of a wiring material and Z or an insulating film used for forming a switching element and Z or an electrode formed on the substrate. Is preferred. Therefore, the second alignment mark can be formed without preparing a separate member to create the second alignment mark additionally. Therefore, production efficiency can be increased.

[0071] In the display device of the present invention, it is preferable that the first alignment mark and the second alignment mark also have a protruding portion force whose outer shape protrudes in a planar shape. According to the said structure, alignment becomes easy.

[0072] In the display device of the present invention, it is preferable that the first alignment mark and the second alignment mark also have a concave portion force having a concave outer shape in a planar shape. According to the said structure, alignment becomes easy.

[0073] Further, in the display device of the present invention, a dye or a pigment is added to the polarizing plate, and the first alignment mark is removed from the dye or the pigment added. It is preferable that it is formed from the above. According to the above configuration, the added one of the dyes or pigments is removed, and this portion is used as the first alignment mark. For this reason, since this part transmits natural light, it can be easily aligned with the display panel.

[0074] In the display device of the present invention, it is preferable that the display panel and the polarizing plate have a substantially circular shape.

[0075] As described above, in the display panel according to the present invention, the planar shape of at least one of the display panel and the polarizing plate is an irregular shape other than a rectangle, and the polarizing plate is used as a mark for bonding. A second alignment mark is formed as a mark for bonding, which is aligned with the first alignment mark provided on the plate and bonded to the polarizing plate.

[0076] Further, as described above, in the display panel according to the present invention, the planar shape of at least one of the display panel and the polarizing plate is an irregular shape other than a rectangle, and serves as a mark for bonding. By aligning with the first alignment mark provided on the polarizing plate and bonding to the polarizing plate, the direction of the alignment axis and the direction of the polarizing axis are aligned with each other as a mark for bonding. The second alignment mark is formed.

[0077] Further, as described above, in the polarizing plate according to the present invention, the planar shape of at least one of the display panel and the polarizing plate is an irregular shape other than a rectangle, and is used as a mark for bonding. A first alignment mark is formed as a bonding mark, which is aligned with the second alignment mark provided on the orientation means and bonded to the display panel.

[0078] Further, as described above, the polarizing plate according to the present invention includes the display panel and the polarizing plate. At least one of the planar shapes is an irregular shape other than a rectangle, and is aligned with the second alignment mark provided on the alignment means as a mark for bonding and bonded to the display panel. The first alignment mark as a mark for bonding is formed so that the direction of the alignment axis matches the direction of the polarization axis.

[0079] Further, as described above, in the display device according to the present invention, the planar shape of at least one of the display panel and the polarizing plate is an irregular shape other than a rectangle, and the display panel includes A second alignment mark is provided as a mark for bonding with the polarizing plate, while a first alignment mark is provided as a mark for bonding with the display panel on the polarizing plate. The

[0080] Further, in the display device according to the present invention, at least one of the display panel and the polarizing plate has an irregular shape other than a rectangular shape, and the alignment is performed by aligning each other. The display panel is provided with a second alignment mark as a mark for bonding to the polarizing plate so that the direction of the axis matches the direction of the polarizing axis, while the polarizing plate includes the display panel. The first alignment mark is provided as a mark for bonding.

Accordingly, there is an effect that the irregular display panel and the polarizing plate can be bonded together with high accuracy.

[0082] The specific embodiments or examples made in the detailed description section of the present invention are to clarify the technical contents of the present invention, and are limited to such specific examples. Therefore, the present invention should not be construed in a narrow sense and can be implemented with various modifications within the scope of the following claims.

Industrial applicability

[0083] The liquid crystal display panel, polarizing plate, and liquid crystal display device of the present invention can be particularly preferably used mainly for liquid crystal display devices having irregular shapes such as a speedometer portion of a car.

Claims

The scope of the claims

[1] In a display panel comprising a substrate and a plate-like orientation means provided on the substrate, and forming a display device by bonding to a polarizing plate,

It is an irregular shape other than the planar shape force rectangle of at least one of the display panel and the polarizing plate,

Alignment with the first alignment mark provided on the polarizing plate as a mark for bonding, and bonding with the polarizing plate, a second alignment mark as a bonding mark is formed. Characteristic display panel.

[2] In a display panel comprising a substrate and a plate-like orientation means provided on the substrate and having an orientation axis, and forming a display device by bonding with a polarizing plate having a polarization axis, the display panel and the polarization Planar shape force of at least one of the plates is an irregular shape other than a rectangle,

By aligning with the first alignment mark provided on the polarizing plate as a mark for bonding and bonding with the polarizing plate, the direction of the alignment axis matches the direction of the polarizing axis. A display panel, wherein a second alignment mark is formed as a mark for bonding.

[3] The display panel according to claim 1 or 2, wherein a plurality of the second alignment marks are provided so as to be non-rotationally symmetric.

[4] The second alignment mark may be formed of a wiring material and / or an insulating film used for forming a switching element and / or an electrode formed on the substrate. Range 1st term power The display panel according to 1), any power in 3rd term.

[5] The second alignment mark has a protruding portion force whose outer shape protrudes in the same planar shape as the first alignment mark. of! The display panel according to item 1 above.

[6] The second alignment mark according to claim 1, characterized in that the second alignment mark is formed of a recess having a concave outer shape in the same planar shape as the first alignment mark. of

The display panel described in item 1

[7] The first aspect of the invention is characterized in that the planar shape is substantially circular like the polarizing plate. 6. The display panel according to item 6! /, Displacement force 1.

[8] In a polarizing plate for forming a display device by being bonded to a display panel including a substrate and a flat plate-like orientation unit provided on the substrate,

A first alignment mark is formed as a bonding mark, which is aligned with the second alignment mark provided on the orientation means as a bonding mark and bonded to the display panel. A polarizing plate characterized by that.

[9] A polarizing plate having a polarization axis, which forms a display device by bonding to a display panel provided with a substrate and a plate-like orientation means having an orientation axis provided on the substrate. It is an irregular shape other than the planar shape force rectangle of at least one of the polarizing plates,

By aligning with the second alignment mark provided on the alignment means as a mark for bonding and bonding to the display panel, the direction of the alignment axis matches the direction of the polarization axis. A polarizing plate characterized in that a first alignment mark is formed as a mark for bonding!

[10] The polarizing plate according to [8] or [9], wherein a plurality of the first alignment marks are provided so as to be non-rotationally symmetric.

[11] The polarizing plate according to any one of [8] and [10], wherein the first alignment mark is a hollowed hole.

[12] Dyes or pigments are added,

The first alignment mark is formed by removing the added one of the dyes or pigments. 8. The power of any one of claims 8 to 11, The polarizing plate as described in a term.

[13] The first and second alignment marks are characterized in that the first alignment mark also includes a protruding portion force whose outer shape protrudes in the same plane shape as the second alignment mark. The polarizing plate according to item 1, wherein the deviation is.

[14] The first alignment mark has the same planar shape as the second alignment mark. The polarizing plate according to claim 8, characterized in that the polarizing plate comprises a recessed portion having a recessed outer shape.

[15] The polarizing plate as set forth in any one of [14], wherein the planar shape is substantially circular as in the case of the display panel.

[16] A display device comprising a substrate and a flat panel-like orientation means provided on the substrate, and a polarizing plate, and a display device comprising:

At least one of the display panel and the polarizing plate has an irregular shape other than a rectangular shape,

The display panel is provided with a second alignment mark as a mark for bonding with the polarizing plate, while the polarizing plate has a first alignment mark as a mark for bonding with the display panel. A display device comprising:

[17] In a display device comprising a substrate, a display panel provided on the substrate and a plate-like alignment means having an alignment axis, and a polarizing plate having a polarization axis.

By aligning each other, the second alignment mark as a mark for bonding to the polarizing plate is provided on the display panel so that the direction of the alignment axis matches the direction of the polarization axis. On the other hand, the polarizing plate is provided with a first alignment mark as a mark for bonding to the display panel.

[18] The display device according to [16] or [17], wherein a plurality of the second alignment marks are provided so that each of them is non-rotationally symmetric.

[19] The display according to any one of claims 18 and 18, wherein the first alignment mark is provided in a plurality so as to be non-rotationally symmetric. apparatus.

[20] The second alignment mark may be formed of a wiring material and / or an insulating film used for forming a switching element and a Z or electrode formed on the substrate. Range 16th term force Display device given in any 1 paragraph of 19th term.

[21] The first alignment mark and the second alignment mark have a planar shape. 21. The display device according to claim 20, wherein the force of the protruding portion of the outer shape protrudes and the force of the protruding portion of the outer shape of the outer shape protrudes.

[22] The first alignment mark and the second alignment mark are each composed of a recessed portion having a concave outer shape in a planar shape. The display device according to claim 1.

[23] A dye or pigment is added to the polarizing plate,

The first alignment mark is formed by removing the added one of the dye or the pigment, and the force in item 16 of claim 1 is either 1 of item 20 The display device according to item.

[24] The display device according to any one of items 23 to 23, wherein the planar shape of the display panel and the polarizing plate is substantially circular.