Liquid crystal panel and liquid crystal display device

Abstract

To provide a liquid crystal panel which may prevent the occurrence of a harmful effect in a display image even when a ZZ orientation defect occurs following a temperature change in use, and a liquid crystal display device having the liquid crystal panel.SOLUTION: A liquid crystal panel according to the present invention comprises: two substrates which are opposed to each other; a seal part which sticks the two substrates to each other; a liquid crystal which is injected in a region surrounded by the seal part between the two substrates; and orientation films which are provided on opposing surfaces of the two substrates and orient the liquid crystal along a prescribed orientation regulation direction. One substrate has a rectangular-shaped pixel region. The seal part has a first portion extending along a first side of the pixel region and a second portion extending along a second side orthogonal to the first side. When assuming a virtual line extending along the orientation regulation direction in the plan view of the orientation film provided on one substrate side and passing through a corner part of the first side and the second side from the inner side of the pixel region, the virtual line satisfies a prescribed condition.SELECTED DRAWING: Figure 5

Description

[Technical field]

[0001] The present invention relates to a liquid crystal panel and a liquid crystal display device. [Background technology]

[0002] A liquid crystal display device using ferroelectric liquid crystal is known as a liquid crystal display device with excellent contrast (see Patent Document 1). In such a liquid crystal display device, a predetermined voltage is applied during the manufacturing process to make the alignment of the ferroelectric liquid crystal uniform in the initial state, thereby preventing the occurrence of zigzag defects (ZZ alignment defects). However, although Patent Document 1 describes how to make the alignment of the ferroelectric liquid crystal uniform in the initial state, it does not mention anything about the occurrence of ZZ alignment defects that accompany temperature changes during use, etc. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2004-151578 A Summary of the Invention [Problem to be solved by the invention]

[0004] Even if the liquid crystal is uniformly aligned in the initial state, since there are seals that separate the liquid crystal, discontinuities in the alignment of the liquid crystal are formed at the boundaries between the seals, and ZZ alignment defects may occur with temperature changes. In view of the above, the present invention provides a liquid crystal panel that can prevent adverse effects on the displayed image even if ZZ alignment defects occur with temperature changes during use, and a liquid crystal display device equipped with such a liquid crystal panel. [Means for solving the problem]

[0005] According to one aspect of the present invention, there is provided a liquid crystal panel. The liquid crystal panel includes two substrates facing each other, a seal portion for bonding the two substrates together, liquid crystal injected into an area surrounded by the seal portion between the two substrates, and an alignment film provided on each of the opposing surfaces of the two substrates for aligning the liquid crystal along a predetermined alignment restriction direction. One of the two substrates has a rectangular pixel region. The seal portion has a first portion extending along a first side of the pixel region and a second portion extending along a second side perpendicular to the first side. When a virtual line is defined in a plan view of the alignment film provided on one of the substrates, the virtual line extends along the alignment restriction direction and passes through a corner between the first side and the second side from inside the pixel region, any one of the following conditions (1) to (3) is satisfied. (1) The virtual line passes through the corner between the first and second parts. (2) The angle between the imaginary line and the second portion is 45° or less, and the imaginary line passes midway through the second portion in the longitudinal direction. (3) The angle between the imaginary line and the first portion is 45° or less, and the imaginary line passes midway through the first portion in the longitudinal direction.

[0006] According to this embodiment, it is possible to provide a liquid crystal panel that can prevent a displayed image from being adversely affected even if a ZZ orientation defect occurs due to a temperature change during use, and a liquid crystal display device including such a liquid crystal panel. [Brief description of the drawings]

[0007] [Figure 1] 1 is a perspective view illustrating a liquid crystal display device according to an embodiment of the present invention. [Diagram 2] 1 is a plan view illustrating a liquid crystal panel according to an embodiment of the present invention. [Diagram 3] 3 is a cross-sectional view taken along line AA in FIG. 2. [Figure 4] FIG. 2 is a cross-sectional view illustrating a schematic layer structure of a ferroelectric liquid crystal. [Diagram 5] 11 is a plan view showing the positional relationship between a dummy pixel region and a sealing portion with respect to the rubbing direction. FIG. [Figure 6] 11 is a plan view showing the positional relationship between a dummy pixel region and a sealing portion with respect to the rubbing direction. FIG. [Figure 7] 1 is a plan view showing the spread of ZZ orientation defects. [Figure 8] 11 is a plan view showing the positional relationship between a dummy pixel region and a sealing portion with respect to the rubbing direction. FIG. [Figure 9] 11 is a plan view showing the positional relationship between a dummy pixel region and a sealing portion with respect to the rubbing direction. FIG. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0008] DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, embodiments of the present invention will be described with reference to the drawings. Various characteristic features shown in the following embodiments can be combined with each other.

[0009] Incidentally, the program for realizing the software appearing in this embodiment may be provided as a non-transitory computer-readable recording medium, or may be provided so as to be downloadable from an external server, or may be provided so that the program is started on an external computer and its functions are realized on a client terminal (so-called cloud computing).

[0010] In this embodiment, the term "unit" may include, for example, a combination of hardware resources implemented by a circuit in the broad sense and software information processing that can be specifically realized by these hardware resources. In addition, this embodiment handles various information, which may be represented by, for example, physical values ​​of signal values ​​representing voltage and current, high and low signal values ​​as a binary bit set consisting of 0 or 1, or quantum superposition (so-called quantum bits), and communication and calculations may be performed on a circuit in the broad sense.

[0011] In addition, a circuit in the broad sense is a circuit realized by at least appropriately combining a circuit, circuitry, a processor, and a memory, etc. In other words, it includes an application specific integrated circuit (ASIC), a programmable logic device (e.g., a simple programmable logic device (SPLD), a complex programmable logic device (CPLD), and a field programmable gate array (FPGA)), etc.

[0012] FIG. 1 is a perspective view showing an embodiment of a liquid crystal display device of the present invention. FIG. 2 is a plan view showing an embodiment of a liquid crystal panel of the present invention. FIG. 3 is a cross-sectional view taken along line AA in FIG. 2. FIG. 4 is a cross-sectional view showing a layer structure of a ferroelectric liquid crystal. FIG. 5, FIG. 6, FIG. 8 and FIG. 9 are plan views showing the positional relationship between a dummy pixel region and a sealing portion with respect to the rubbing direction. FIG. 7 is a plan photograph showing the spread of ZZ orientation defects. In the following description, the upper side in Fig. 1, Fig. 3, and Fig. 4 will be referred to as "top" or "upper", and the lower side will be referred to as "bottom" or "lower". Also, in Fig. 2, Fig. 5 to Fig. 9, the front side of the paper will be referred to as "top" or "upper", and the back side of the paper will be referred to as "bottom" or "lower".

[0013] <Liquid crystal display device> The liquid crystal display device 100 is a reflective liquid crystal display device that displays a color image according to image data input from an electronic device such as a digital camera or a mobile phone. The liquid crystal display device 100 shown in FIG. 1 includes an actively driven liquid crystal panel 1, a housing 10, a circuit board 20, a light source 30, a reflecting member 40, a diffusion plate 50, a polarizing plate 60, a transparent member 70, a polarizing beam splitter 80, and an eyepiece lens 90. The light source 30 includes R, G, and B LEDs, and is disposed on the upper surface of the circuit board 20. The light L of each color emitted from the light source 30 is reflected by the reflecting member 40 toward the polarizing beam splitter 80.

[0014] The light L reflected by the reflecting member 40 is diffused by the diffusing plate 50 and linearly polarized by the polarizing plate 60. The light L then passes through the transparent member 70 and is reflected by the polarizing beam splitter 80, becoming a substantially uniform parallel light beam that illuminates the image display surface of the liquid crystal panel 1. A part of the light L emitted from the image display surface of the liquid crystal panel 1 passes through the polarizing beam splitter 80 and the eyepiece lens 90, and is visually recognized as an image by the observer. The light source 30 may be configured with a light emitting device other than an LED. Also, the reflective member 40, the diffusion plate 50, the transparent member 70, etc. may be omitted.

[0015] The liquid crystal display device 100 also has, for example, a liquid crystal panel control circuit and a light source control circuit mounted on the circuit board 20 (neither of which is shown). The liquid crystal panel control circuit receives image data input from an overall control CPU or the like of the main body (not shown) of the electronic device to which the liquid crystal display device 100 is connected. The liquid crystal panel control circuit then controls the source driver and gate driver to control the amount of light transmitted through each pixel of the liquid crystal panel 1. Furthermore, the liquid crystal panel control circuit transmits a timing signal for synchronizing with the light source 30 to the light source control circuit.

[0016] Moreover, on the circuit board 20, a processing element and a storage element are mounted. The arithmetic element is composed of, for example, a CPU (Central Processing Unit), an MPU (Micro Processing Unit), etc. The arithmetic element realizes various functions related to the liquid crystal display device 100 by reading out a predetermined program stored in the memory element. That is, information processing by the software stored in the memory element is specifically realized by the arithmetic element. The number of arithmetic elements is not limited to one, and a plurality of arithmetic elements may be provided for each function, or a combination thereof may be used.

[0017] The memory element stores various pieces of information defined in the above description. This can be implemented, for example, as a storage device such as a solid state drive (SSD) that stores various programs related to the liquid crystal display device 100 executed by the arithmetic element, or as a memory such as a random access memory (RAM) that stores temporarily required information (arguments, arrays, etc.) related to the arithmetic operation of the program. The storage element also stores various programs and variables related to the liquid crystal display device 100 that are executed by the arithmetic element.

[0018] The liquid crystal panel 1 shown in Figures 2 and 3 has a glass substrate 21 and a silicon substrate 22 (two substrates facing each other), and a sealing portion 3 including a spacer 31 provided between the glass substrate 21 and the silicon substrate 22 to maintain a constant distance between them. The spacer 31 is made of, for example, silica particles. The main portion of the seal portion 3 is made of an adhesive 32 such as, for example, an ultraviolet-curable (active energy ray-curable) adhesive or a thermosetting adhesive. Therefore, the seal portion 3 defines the distance between the glass substrate 21 and the silicon substrate 22, and also has the function of bonding the two substrates 21, 22 together.

[0019] The seal portion 3 is obtained by applying an adhesive 32 containing spacers 31 to the silicon substrate 22 side by various application methods such as printing, bonding the glass substrate 21 side, and then curing the adhesive 32 by irradiating with ultraviolet light for a certain period of time, heating, etc. Note that the seal portion 3 is applied inside the peripheral portions of the substrates 21, 22 to prevent the adhesive 32 from leaking outward from the glass substrate 21 and the silicon substrate 22, as shown in FIG.

[0020] A transparent electrode (common electrode) 41 for applying a voltage to the liquid crystal 6 is provided on the inner side of the glass substrate 21 (the surface facing the silicon substrate 22). The transparent electrode 41 is made of a transparent conductive material such as ITO, FTO, or ZTO. Also provided on the inner side of the silicon substrate 22 (the surface facing the glass substrate 21) are a plurality of pixel electrodes 42 and a plurality of TFTs (switching elements) for applying a voltage to the liquid crystal 6. The pixel electrodes 42 are made of a conductive material such as aluminum or an aluminum alloy. The TFTs can be replaced with other switching elements such as MOSFETs.

[0021] In this embodiment, the pixel electrodes 42 and the TFTs are arranged in a matrix, and a part of the region in which the pixel electrodes 42 and the TFTs are arranged constitutes a rectangular (rectangular or square) effective pixel region 4E, and the other part constitutes a strip-shaped dummy pixel region 4D surrounding the effective pixel region 4E. The effective pixel region 4E is a region in which an image (actual image) corresponding to image data input from an electronic device is displayed, and the dummy pixel region 4D is a region serving as a border (frame) in which a uniform black image is always displayed regardless of the image data input from the electronic device. Around the dummy pixel region 4D, there are arranged a source driver that applies a display signal to each pixel electrode 42, a gate driver that applies a gate signal to each TFT, etc. The region where these drivers are arranged is a region that does not directly affect the appearance of the image (transmission of light L).

[0022] Therefore, the silicon substrate (one substrate) 22 of this embodiment has a rectangular pixel region 4 that is composed of an effective pixel region 4E and a dummy pixel region 4D. In addition, by applying a voltage to the liquid crystal 6 at a predetermined timing via the source driver and the gate driver, the orientation state of the liquid crystal molecules 61 in the liquid crystal 6 can be changed, thereby controlling the amount of light transmitted through each pixel of the liquid crystal panel 1.

[0023] Furthermore, an electrode pad 43 is provided on the silicon substrate 22 outside the seal portion 3. As shown in FIG. On the inner side of the glass substrate 21 (the surface facing the silicon substrate 22) and on the inner side of the silicon substrate 22 (the surface facing the glass substrate 21), there are provided alignment films 51 and 52, respectively, which have the function of promoting the alignment of the liquid crystal molecules 61. The alignment films 51 and 52 are made of an organic material such as polyimide. A part of the alignment film 52 fills the gaps between the multiple pixel electrodes 42, thereby ensuring insulation between the adjacent pixel electrodes 42.

[0024] The alignment films 51 and 52 are provided with anisotropy by a rubbing process to align the liquid crystal molecules 61 (liquid crystal 6) along a predetermined alignment direction. The rubbing process can be, for example, a process of rubbing the surface with a cloth (e.g., made of cotton or rayon) wound on a roll, a process of irradiating with ultraviolet light, or the like. The alignment films 51 and 52 may also be made of inorganic alignment films formed by obliquely evaporating silicon oxide.

[0025] In the region between the alignment film 51 (glass substrate 21) and the alignment film 52 (silicon substrate 22) and surrounded by the seal portion 3, a ferroelectric liquid crystal is injected as the liquid crystal 6. The sealing portion 3 has an injection port 38. After ferroelectric liquid crystal is injected as the liquid crystal 6 from this injection port 38, the injection port 38 is sealed with a sealant 39 to prevent leakage of the liquid crystal 6. The sealant 39 is composed of, for example, an ultraviolet-curable (active energy ray-curable) adhesive. The sealant 39 is a separate member from the sealing portion 3, but can be said to be substantially a part of the sealing portion 3.

[0026] In the case of ferroelectric liquid crystal, because of its high viscosity, it is injected into the area surrounded by the sealing portion 3 in a phase (e.g., nematic phase, isotropic phase) that is at a higher temperature than the smectic phase. Thereafter, the temperature is lowered (cooled) to near room temperature at which the liquid crystal panel 1 (liquid crystal display device 100) is used, thereby causing the smectic phase to appear. Here, since the smectic phase is highly ordered, the liquid crystal molecules 61 have a structure close to a crystal, called a layer structure, as shown in Fig. 4. For this reason, the liquid crystal 6 is treated so that this cooling state is uniform, thereby preventing the occurrence of orientation defects (ZZ orientation defects) during manufacturing.

[0027] 2 and 3, the liquid crystal panel 1 further includes a mask 7 provided on the surface of the glass substrate 21 (the other substrate) opposite to the silicon substrate 22 (the one substrate). The mask 7 has a mask opening 71. The mask 7 is disposed so as to expose the effective pixel region 4E from the mask openings 71 in a plan view and to include (cover) at least the peripheral portion of the dummy pixel region 4D. The mask 7 may be in a form that includes the dummy pixel region 4D up to the boundary with the effective pixel region 4E.

[0028] Here, according to the inventors' investigations, it was found that even if the occurrence of orientation defects (ZZ orientation defects) in the liquid crystal 6 during manufacturing is prevented, orientation defects are formed at the boundary between the liquid crystal 6 and the sealing portion 3 (a discontinuity in the orientation of the liquid crystal 6) due to temperature changes during use, as shown in Figure 7(a). Then, this alignment defect spreads toward the pixel region 4, as shown in Figures 7(b) and 7(c), and eventually, an alignment defect occurrence region in the shape of a right-angled triangle is formed that overlaps with the pixel region 4 (dummy pixel region 4D), as shown in Figures 7(d) and 8.

[0029] It was also found that the hypotenuse of this alignment defect region depends on the rubbing direction (alignment control direction) of the alignment films 51 and 52, and specifically, extends along the normal direction of the rubbing direction, which coincides with the direction of the arrow indicated by the dashed double-dotted line in Figures 5, 6, and 8. It was also found that the orientation defects occur with both high and low temperature changes, and that the defects grow larger as the temperature increases or decreases.

[0030] Therefore, in the present invention, in a planar view of the alignment film 52 provided on the silicon substrate (one of the substrates) 22, a virtual line VL is defined which extends along the alignment control direction and passes through the corner 4C of the pixel region 4 from the inside of the pixel region, and this virtual line VL is set to pass through a predetermined position of the sealing portion 3. In this embodiment, a corner 4C of the pixel region 4 through which the virtual line VL passes coincides with a corner of the dummy pixel region 4D (the intersection of the first outer side 4A and the second outer side 4B perpendicular to the first outer side 4A).

[0031] The sealing portion 3 has a first portion 3A extending along a first outer side 4A of the pixel region 4 (dummy pixel region 4D) and a second portion 3B extending along a second outer side 4B. In this embodiment, the first portion 3A and the second portion 3B are perpendicular to each other. The imaginary line VL is set so as to pass through a corner 3C between the first portion 3A and the second portion 3B (see FIG. 5) or midway along the length of the second portion 3B (see FIG. 6). In this embodiment, the corner 3C coincides with the intersection of the inner side of the first portion 3A and the inner side of the second portion 3B.

[0032] In particular, in this embodiment, the angle θ between the virtual line VL and the second portion 3B is set to 45° or less, preferably 40° or less, more preferably 35° or less, further preferably 30° or less, and particularly preferably 25° or less. In other words, the angle (90°-θ) between the virtual line VL and the first portion 3A is set to more than 45°. According to this configuration, by separating the pixel region 4 from the first part 3A of the sealing portion 3 along the shorter of the two sides, excluding the hypotenuse side, of the alignment defect occurrence region to be formed (in this embodiment, the second part 3B of the sealing portion 3), it is possible to prevent the liquid crystal panel 1 from becoming large while also preventing the alignment defect occurrence region from overlapping the pixel region 4. In other words, by simply separating the pixel region 4 slightly from the first part 3A of the sealing portion 3 along the second part 3B of the sealing portion 3, the distance (straight-line distance) between the corner 4C of the pixel region 4 and the hypotenuse of the region where alignment defects occur can be greatly increased (due to the mathematical relationship between the angle of the hypotenuse and the distance), so that the region where alignment defects occur is less likely to overlap the pixel region 4 while minimizing the increase in size of the liquid crystal panel 1. The method of separating the pixel region 4 from the first portion 3A of the sealing portion 3 can be appropriately selected from the following: a method of moving the pixel region 4 away from the first portion 3A of the sealing portion 3 fixed at a predetermined position; a method of moving the first portion 3A of the sealing portion 3 away from the pixel region 4 fixed at a predetermined position; or a method of moving the pixel region 4 and the first portion 3A of the sealing portion 3 away from each other.

[0033] The angle between the virtual line VL and the second portion 3B can also be determined based on the switching angle of the liquid crystal 6 (liquid crystal molecules 61). Specifically, when the switching angle of the liquid crystal 6 is X, the angle is preferably (X / 2)±5°, more preferably (X / 2)±4°, and further preferably (X / 2)±3°. This makes it possible to increase the contrast of the liquid crystal panel 1 while further improving the light / dark switching speed. The alignment control direction is the rubbing direction of the alignment films 51 and 52. In this case, it is preferable to apply the present invention. However, the alignment control direction is not limited to the rubbing direction, and may be a direction determined by oblique deposition or the like.

[0034] The distance (straight-line distance) between the corner 4C of the pixel region 4 (dummy pixel region 4D) and the corner 3C of the sealing portion 3 is preferably set so that the maximum area of ​​the alignment defect-occurring region of the liquid crystal 6 formed between the first portion 3A and the second portion 3B within the range of the operating temperature of the liquid crystal panel 1 does not overlap the pixel region 4. In this case, it is possible to more reliably prevent the alignment defect-occurring region from overlapping the pixel region 4. The operating temperature range of the liquid crystal panel 1 is the design guaranteed operating temperature range, which is, for example, -10°C to 70°C, but is not limited to this range. From another perspective, the value represented by the formula "distance between the intersection of the virtual line VL and the second portion 3B and the corner 3C of the sealing portion 3 (D in FIG. 6) / average width of the dummy pixel region (W in FIG. 6)" is preferably 10 or less, more preferably 8 or less, even more preferably 6 or less, and particularly preferably 4 or less. This makes it possible to prevent the distance between the sealing portion 3 and the pixel region 4 from becoming larger than necessary, that is, to prevent the liquid crystal panel 1 from becoming larger.

[0035] Furthermore, the sealant 3 of this embodiment has an injection port 38 for injecting liquid crystal 6 into the region between the two substrates 21, 22 on the opposite side to the corner 3C across a diagonal line 49 of the pixel region 4 (the opposite side of the corner 3C). In this configuration, if the alignment restriction direction is set to the rubbing direction of the alignment films 51, 52 from the corner 4C of the pixel region 4 toward the opposite side (injection port 38) of the corner 3C of the seal portion 3, ZZ alignment defects are likely to occur in the vicinity of the injection port 38. In this case, if a corner of the seal portion 3 similar to the corner 3C or a corner between the seal portion 3 and the sealing material 39 (part of the seal portion 3) exists in the vicinity of the injection port 38, the positional relationship between the corner and the corner of the pixel region 4 in the vicinity of the injection port 38 can be set in the same manner as the positional relationship between the corner 3C of the seal portion 3 and the corner 4C of the pixel region 4 shown in Figures 5 and 6, thereby obtaining the same effect as described above.

[0036] According to the liquid crystal panel 1 of the above embodiment, the relationship between the pixel region and the sealing portion is appropriately set, so that the display image is less likely to be adversely affected even if ZZ alignment defects occur due to temperature changes during use while preventing the liquid crystal panel from becoming large. Furthermore, a liquid crystal display device equipped with such a liquid crystal panel is small in size and can continuously exhibit excellent display performance. It can be said that the liquid crystal panel 1 of the above embodiment satisfies the following condition (1) or (2). (1) The imaginary line VL passes through the corner 3C of the seal portion 3. (2) The angle θ between the imaginary line VL and the second portion 3B of the seal portion 3 is 45° or less, and the imaginary line VL passes through the middle of the second portion 3B of the seal portion 3 in the longitudinal direction.

[0037] Furthermore, it may be provided in the following aspects: In the liquid crystal panel, when the condition (2) is satisfied, the angle between the virtual line and the second portion, and when the condition (3) is satisfied, the angle between the virtual line and the first portion, are each (X / 2)±5°, where X is a switching angle of the liquid crystal. In the liquid crystal panel, the alignment control direction is a rubbing direction of the alignment film. In the liquid crystal panel, a distance between the corner of the pixel region and the corner of the sealing portion is set so that a maximum area of ​​an alignment defect occurrence region of the liquid crystal formed between the first portion and the second portion within a range of operating temperatures of the liquid crystal panel does not overlap with the pixel region. In the liquid crystal panel, the pixel region has a rectangular effective pixel region and a band-shaped dummy pixel region surrounding the effective pixel region, and the corner of the pixel region through which the virtual line passes is a corner of the dummy pixel region. In the liquid crystal panel, when the condition (2) is satisfied, the value expressed by the formula "the distance between the intersection of the virtual line and the second portion and the corner of the sealing portion / the average width of the dummy pixel region" is 10 or less, and when the condition (3) is satisfied, the value expressed by the formula "the distance between the intersection of the virtual line and the first portion and the corner of the sealing portion / the average width of the dummy pixel region" is 10 or less. The liquid crystal panel further comprises a mask provided on a surface of the other of the two substrates opposite to the one of the substrates, exposing the effective pixel area in a planar view and including at least a peripheral portion of the dummy pixel area. In the liquid crystal panel, the sealing portion has an injection port, through which the liquid crystal is injected into the region between the two substrates, on the opposite side of the corner portion across a diagonal line of the pixel region. In the liquid crystal panel, the liquid crystal is a ferroelectric liquid crystal. A liquid crystal display device comprising the liquid crystal panel. Of course, this is not the case.

[0038] As described above, various embodiments of the present invention have been described, but these are presented as examples and do not limit the scope of the invention in any way. The novel embodiments can be embodied in various other forms, and various omissions, substitutions, and modifications can be made without departing from the gist of the invention. The embodiments and modifications thereof are included in the scope and gist of the invention, and are included in the scope of the invention and its equivalents described in the claims.

[0039] For example, in the liquid crystal panel of the present invention, instead of the ferroelectric liquid crystal, a TN liquid crystal, an STN liquid crystal, an antiferroelectric liquid crystal, or the like can be used as the liquid crystal 6. Even in this case, the same effects as those of the above embodiment can be expected.

[0040] Furthermore, when the angle θ between the virtual line VL and the second portion 3B of the seal portion 3 exceeds 45°, in other words, when the angle (90°-θ) between the virtual line VL and the first portion 3A of the seal portion 3 is 45° or less, the pixel region 4 may be spaced apart from the second portion 3B of the seal portion 3 along the first portion 3A of the seal portion 3. In this case, the virtual line VL is set to pass midway through the first portion 3A of the seal portion 3 in the longitudinal direction, as shown in Fig. 9. Even in this case, the same effect as in the above embodiment can be expected. It can be said that the liquid crystal panel 1 of the embodiment shown in FIG. 9 satisfies the following condition (3). (3) The angle (90°-θ) between the imaginary line VL and the first portion 3A of the seal portion 3 is 45° or less, and the imaginary line VL passes midway through the first portion 3A in the longitudinal direction.

[0041] In the liquid crystal panel 1 of the embodiment shown in Figure 9, the preferred value of the angle (90°-θ) between the virtual line VL and the first portion 3A of the sealing portion 3, the preferred value of the value expressed by the formula "distance between the intersection of the virtual line VL and the first portion 3A and the corner 3C of the sealing portion 3 / average width of the dummy pixel region", the preferred value of the distance between the intersection of the virtual line VL and the first portion 3A and the corner 3C of the sealing portion 3, and the preferred value of the distance between the corner 4C of the pixel region 4 and the corner 3C of the sealing portion 3 are each the same as those of the embodiment shown in Figures 5 and 6. [Explanation of symbols]

[0042] 100:Liquid crystal display device 10: Housing 20: Circuit board 30:Light source 40: Reflective material 50: Diffuser 60: Polarizing plate 70: Transparent material 80: Polarizing beam splitter 90: Eyepiece 1: LCD panel 21: Glass substrate 22: Silicon substrate 3: Seal part 3A: First part 3B: Second part 3C: Corner 31: Spacer 32: Adhesive 38: Inlet 39: Encapsulating material 4: Pixel area 4A: First perimeter 4B: Second perimeter 4C: Corner 4D: Dummy pixel area 4E: Effective pixel area 41:Transparent electrode 42: Pixel electrode 43: Electrode pad 49: Diagonal 51: Alignment film 52: Alignment film 6: Liquid crystal 61: Liquid crystal molecules 7: Mask 71: Mask opening BW: Bonding wire D: Separation distance L: light VL: Virtual line W: average width θ: angle

Claims

1. A liquid crystal panel, Two substrates facing each other; A seal part for bonding the two substrates together; a liquid crystal, which is a ferroelectric liquid crystal, injected into an area surrounded by the sealing portion between the two substrates; An alignment film is provided on each of the opposing surfaces of the two substrates, and aligns the liquid crystal along a predetermined alignment direction; One of the two substrates has a rectangular pixel region, the sealing portion has a first portion extending along a first side of the pixel region and a second portion extending along a second side perpendicular to the first side, When a virtual line is defined that extends along the alignment control direction in a plan view of the alignment film provided on the one substrate side and passes through a corner between the first side and the second side from inside the pixel region, The following conditions (1) or (2) are met: (1) The angle between the virtual line and the second portion is less than 45°, and the virtual line passes midway along the longitudinal direction of the second portion or through a corner between the first portion and the second portion. (2) The angle between the virtual line and the first portion is less than 45°, and the virtual line passes through the middle of the longitudinal direction of the first portion or through a corner between the first portion and the second portion. a separation distance between the corner of the pixel region and the corner of the sealing portion is set so that a maximum area of ​​an alignment defect occurrence region of the liquid crystal formed between the first portion and the second portion within a range of a usage temperature of the liquid crystal panel does not overlap with the pixel region; The alignment defect occurrence region is a region of a substantially right-angled triangle having one side defined by each of the first portion and the second portion.

2. A liquid crystal display device, A liquid crystal display device comprising the liquid crystal panel according to claim 1.

Images