CN109143656B

CN109143656B - Display device

Info

Publication number: CN109143656B
Application number: CN201710451611.1A
Authority: CN
Inventors: 高振宽; 杨清喆; 郭宗仁
Original assignee: Innolux Corp
Current assignee: Innolux Corp
Priority date: 2017-06-15
Filing date: 2017-06-15
Publication date: 2021-07-20
Anticipated expiration: 2037-06-15
Also published as: CN109143656A

Abstract

A display device comprises a first substrate, a color filter, a first electrode layer, a first alignment layer, a second substrate and a display layer. The first substrate has a display area and a peripheral area. The color filter is arranged corresponding to the display area and comprises a plurality of first pixel areas and a plurality of second pixel areas which are arranged at intervals, and the first pixel areas are green pixel areas. A boundary is formed between the display area and the peripheral area, the first alignment layer corresponding to the first pixel area counted from the boundary to the display area has a first thickness T1, the first alignment layer corresponding to the fourth pixel area counted from the boundary to the display area has a second thickness T2, the unit of the first thickness T1 and the second thickness T2 is micrometer, and the values of the first thickness T1 and the second thickness T2 satisfy the following conditions: 0.8 ≦ T1/T2 ≦ 1.2. The display layer is arranged between the first substrate and the second substrate.

Description

Display device

Technical Field

The present invention relates to a display device, and more particularly, to a display device having an alignment layer.

Background

Alignment layers in lcds are usually formed by wet coating processes, such as flexography (flexography) or ink-jet printing (ink-jet printing). The flexographic printing method applies the coating liquid to the surface to be coated by printing using a roller, and the inkjet printing method applies the coating liquid to the surface to be coated by spraying using a nozzle.

However, when the quality of the alignment layer is poor, the display quality of the display is easily affected. Therefore, there is a need to provide an alignment layer with good quality to solve the problems faced by the prior art.

Disclosure of Invention

The invention relates to a display device. In an embodiment, in the display device, a difference in thickness between the first alignment layer corresponding to the first pixel region and the first alignment layer corresponding to the fourth pixel region from a boundary between the display region and the peripheral region to the display region is 20% or less, which indicates that the thickness of the first alignment layer has good uniformity, thereby reducing generation of color mura (mura) of a picture and improving display quality of the display device.

According to an embodiment of the present invention, a display device is provided. The display device comprises a first substrate, a color filter, a first electrode layer, a first alignment layer, a second substrate and a display layer. The first substrate has a display area and a peripheral area. The color filter is arranged corresponding to the display area on the first substrate, and comprises a plurality of first pixel areas and a plurality of second pixel areas which are arranged at intervals, wherein the first pixel areas and the second pixel areas are pixel areas with different colors. The first electrode layer is arranged on the first substrate, and the first alignment layer is arranged on the first electrode layer. An interface is arranged between the display area and the peripheral area, the first alignment layer corresponding to the first pixel area counted from the interface to the display area has a first thickness T1, the first alignment layer corresponding to the fourth pixel area counted from the interface to the display area has a second thickness T2, the unit of the first thickness T1 and the second thickness T2 is micrometer (mum), and the values of the first thickness T1 and the second thickness T2 meet the following conditions: 0.8 ≦ T1/T2 ≦ 1.2. The display layer is arranged between the first substrate and the second substrate.

Drawings

In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below, wherein:

fig. 1A is a top view of a display device according to an embodiment of the invention.

FIGS. 1B-1D illustrate schematic cross-sectional views along section line 1B-1B' of FIG. 1A according to some embodiments of the invention.

Fig. 1E is a schematic perspective view of a spacer according to an embodiment of the invention.

Fig. 2A is a partial top view of a display device according to an embodiment of the invention.

FIG. 2B is a schematic cross-sectional view taken along line 2B-2B' of FIG. 2A.

The element numbers in the figures are illustrated as follows:

2A: region(s)

10: display device

100: first substrate

100A: interface

110: display area

120: peripheral zone

121: first region

123: second region

125: a third region

200: color filter

200B: blue pixel region

200G, 200G1, 200G 4: green pixel region

200R: red pixel region

300: a first electrode layer

400: a first alignment layer

500: second substrate

600: display layer

700: frame glue

800: spacer

800 a: cross sectional area

800 b: circumference length

910: pixel electrode layer

920: second alignment layer

1B-1B ', 2B-2B': section line

B: distance between two adjacent plates

D1, D2: distance between each other

H: height

P: first width

Q: second width

T1: a first thickness

T2: second thickness

Detailed Description

Various embodiments are described in detail below, which are only used as examples and do not limit the scope of the invention. Like elements in different embodiments and drawings will be denoted by like reference numerals. It should be noted that the specific embodiments are not intended to limit the invention. The invention may be embodied with other features, elements, methods, and parameters. The embodiments are provided only for illustrating the technical features of the invention and not for limiting the claims of the invention. Those skilled in the art will recognize that equivalent modifications and variations can be made in light of the following description without departing from the spirit of the invention. In addition, the drawings in the embodiments omit some elements to clearly show the technical features of the invention.

FIG. 1A illustrates a top view of a display device according to an embodiment of the invention, FIGS. 1B-1D illustrate cross-sectional views along line 1B-1B 'of FIG. 1A according to some embodiments of the invention, FIG. 1E illustrates a perspective view of a spacer according to an embodiment of the invention, FIG. 2A illustrates a partial top view of a display device according to an embodiment of the invention, and FIG. 2B illustrates a cross-sectional view along line 2B-2B' of FIG. 2A. Fig. 2A is a top view of the area 2A of fig. 1A. It is noted that some elements in the drawings are omitted to clearly illustrate the features of the present invention, and some elements are not drawn to actual scale.

As shown in fig. 1A to 1D and fig. 2A to 2B, the display device 10 (display device 10-1/display device 10-2/display device 10-3) includes a first substrate 100, a color filter 200, a first electrode layer 300, a first alignment layer 400, a second substrate 500, and a display layer 600. The first substrate 100 has a display region 110 and a peripheral region 120. In a top view direction, the color filter 200 is disposed corresponding to the display region 110 on the first substrate 100, and the color filter 200 includes a plurality of first pixel regions and a plurality of second pixel regions arranged at intervals, where the first pixel regions and the second pixel regions are pixel regions with different colors. In some embodiments, the first pixel region is, for example, a green pixel region 200G, and the second pixel region is, for example, a red pixel region 200R and/or a blue pixel region 200B. In the present embodiment, the color filter 200 includes a plurality of red pixel regions 200R, a plurality of green pixel regions 200G, and a plurality of blue pixel regions 200B adjacent to each other and arranged at intervals. In other embodiments, the color filter 200 may include a plurality of red pixel regions 200R and a plurality of green pixel regions 200G arranged at intervals, a plurality of green pixel regions 200G and a plurality of blue pixel regions 200B arranged at intervals, or a plurality of red pixel regions 200R and a plurality of blue pixel regions 200B arranged at intervals. In other embodiments, the color filter 200 may include a plurality of red pixel regions 200R, a plurality of green pixel regions 200G, a plurality of blue pixel regions 200B, and a white pixel region (transparent pixel region) arranged at intervals, or a plurality of red pixel regions 200R, a plurality of green pixel regions 200G, a plurality of blue pixel regions 200B, and a yellow pixel region arranged at intervals, without limitation. The first electrode layer 300 is disposed on the first substrate 100, and the first alignment layer 400 is disposed on the first electrode layer 300. The display layer 600 is disposed between the first substrate 100 and the second substrate 500.

In the present embodiment, as shown in fig. 2A, the red pixel area 200R, the green pixel area 200G and the blue pixel area 200B in the display area 110 are repeatedly arranged in sequence, one red pixel area 200R, one green pixel area 200G and one blue pixel area 200B constitute one pixel, and a plurality of pixels in the display area 110 are arranged in a matrix. In the display region 110 (non-edge region), a red pixel region 200R is adjacent to a green pixel region 200G and a blue pixel region 200B, a green pixel region 200G is adjacent to a red pixel region 200R and a blue pixel region 200B, and a blue pixel region 200B is adjacent to a green pixel region 200G and a red pixel region 200R.

According to an embodiment of the disclosure, as shown in fig. 2A, an interface 100A is provided between the display region 110 and the peripheral region 120, the first alignment layer 400 corresponding to (above or below) the first pixel region from the interface 100A to the display region 110 has a first thickness T1, the first alignment layer 400 corresponding to (above or below) the fourth first pixel region from the interface 100A to the display region 110 further has a second thickness T2, the units of the first thickness T1 and the second thickness T2 are micrometers (μm), and the values of the first thickness T1 and the second thickness T2 satisfy the following conditions: 0.8 ≦ T1/T2 ≦ 1.2. For example, in the embodiment, as shown in fig. 2A, the first alignment layer 400 corresponding to (above or below) the first green pixel region 200G (200G1) in the plurality of green pixel regions 200G from the boundary 100A between the display region 110 and the peripheral region 120 toward the display region 110 has a first thickness T1, the first alignment layer 400 corresponding to (above or below) the fourth green pixel region 200G (200G4) in the plurality of green pixel regions 200G from the boundary 100A between the display region 110 and the peripheral region 120 toward the display region 110 further has a second thickness T2, the unit of the first thickness T1 and the second thickness T2 is micrometers (μm), and the values of the first thickness T1 and the second thickness T2 satisfy the following conditions: 0.8 ≦ T1/T2 ≦ 1.2. In other words, the difference in the thickness of the first alignment layer 400 between the first green pixel region 200G1 and the fourth green pixel region 200G4 from the boundary 100A to the display region 110 is less than 20%. In some embodiments, the distance between the boundary 100A and the green pixel region 200G1 of the first pixel is, for example, about 50 micrometers (μm), and the distance between the boundary 100A and the green pixel region 200G4 of the fourth pixel is, for example, about 1000 micrometers (μm). In other embodiments, the difference between the thicknesses of the first alignment layer 400 corresponding to the first other color pixel region and the fourth other color pixel region from the boundary 100A to the display region 110 is also less than 20%.

According to the embodiment of the present disclosure, the difference between the thicknesses of the first alignment layer 400 corresponding to the first pixel region (e.g., the green pixel region 200G1) and the fourth pixel region (e.g., the green pixel region 200G4) from the boundary 100A to the display region 110 is less than 20%, which indicates that the thickness of the first alignment layer 400 has good uniformity, so that the generation of mura can be reduced, and the display quality of the display device can be improved.

In some embodiments, as shown in fig. 1A to 1D, the display layer 600 is, for example, a liquid crystal layer, and the first electrode layer 300 is, for example, a transparent conductive layer, for example, made of Indium Tin Oxide (ITO) or other metal oxide conductor. In some embodiments, the first electrode layer 300 is, for example, a common electrode.

In an embodiment, as shown in fig. 1A to 1D, the display device further includes a sealant 700 and a plurality of spacers 800. The sealant 700 is disposed on the peripheral region 120 of the first substrate 100 and surrounds the display region 110 of the first substrate 100, and the spacer 800 is disposed between the first substrate 100 and the second substrate 500.

In some embodiments, the height H of the spacers 800 is, for example, greater than or equal to 2 micrometers (μm) and less than or equal to 5 micrometers (μm).

In some embodiments, a spacing between the spacers 800 in the peripheral region 120 is, for example, greater than or equal to 25 micrometers (μm) and less than or equal to 500 micrometers (μm).

In some embodiments, referring to fig. 2A, the spacer 800 has a first width P along an extending direction of the boundary 100A between the display area 110 and the peripheral area 120, the spacer 800 has a second width Q along an extending direction perpendicular to the boundary 100A, the unit of the first width P and the second width Q is micrometers (μm), and the values of the first width P and the second width Q of the spacer 800 in the peripheral area 120 may satisfy the following condition: 0.1 ≦ Q/P ≦ 100.

In the embodiment, the first alignment layer 400 is fabricated by coating the first substrate 100 with the alignment layer liquid material and then baking the first alignment layer 400, and the three-dimensional structure (e.g., spacer) on the first substrate 100 may cause the coating liquid to be retained on the surface of the three-dimensional structure and generate a surface tension phenomenon, which may result in uneven thickness expansion of the coating liquid film. According to the embodiment of the present disclosure, when the first width P and the second width Q of the spacer 800 satisfy the condition of 0.1 ≦ Q/P ≦ 100 and the pitch of the spacer 800 satisfies greater than or equal to 25 micrometers (μm) and less than or equal to 500 micrometers (μm), the ratio of the two widths representing the shape of the spacer 800 is limited to the above range, and thus the surface tension can be reduced and the phenomenon of uneven thickness spread of the three-dimensional structure of the spacer 800 with respect to the coating liquid can be improved, so that the thickness uniformity of the manufactured first alignment layer 400 can be improved, and the display quality can be further improved. The shape of the spacer 800 shown in fig. 2A is a plan view of the spacer 800 as viewed from a plane perpendicular to the substrate.

In an embodiment, as shown in fig. 1A and fig. 2A, the peripheral region 120 may have a first region 121, and the first region 121 is defined as a range extending from a boundary 100A of the display region 110 and the peripheral region 120 to the direction of the sealant 700 by 100 micrometers. As shown in fig. 1A and fig. 2A, the first region 121 covers a range extending 100 micrometers from the outer periphery (i.e., the boundary 100A) of the display area 110, and surrounds the display area 110.

In an embodiment, the spacer 800 in the first region 121 is, for example, a conductive stopper (conductive stopper), which is used to prevent the conductive structures on the upper and lower sides of the spacer 800 from being shorted, and provide a supporting effect. However, the above is an embodiment, and the spacer 800 in the first region 121 of the disclosure is not limited to the conductive barrier layer.

In an embodiment, as shown in fig. 2A, the unit of the first width P and the second width Q is micrometers (μm), and the values of the first width P and the second width Q of the spacer 800 located in the first region 121 satisfy the following condition: 0 ≦ P/Q ≦ 1. In some embodiments, the first width P and the second width Q are expressed in micrometers (μm), and the values of the first width P and the second width Q of the spacer 800 located in the first region 121 may further satisfy the following condition: 0.01 ≦ P/Q ≦ 1.

As described above, when the first alignment layer 400 is manufactured, an alignment layer liquid material needs to be coated on the first substrate 100, and the coating liquid stays on the surface of the three-dimensional structure (e.g., spacer) and the generated surface tension phenomenon may cause uneven thickness expansion of the coating liquid film layer, as shown in fig. 2A, since the first region 121 is the region closest to the display region 110, when the application amount of the coating liquid is fixed, if the capillary phenomenon generated by the three-dimensional structure in the first region 121 causes the liquid level of the coating liquid in the region to be undesirably increased and more coating liquid body stays in the first region 121, the amount of the coating liquid in the display region 110 adjacent to the first region 121 is inevitably reduced, and the coating liquid film layer in the display region 110 is further undesirably lowered; as a result, not only the first alignment layer 400 in the peripheral region 120 but also the first alignment layer 400 in the display region 110 may have uneven thickness.

In contrast, according to the embodiment of the present disclosure, when the values of the first width P and the second width Q of the spacer 800 in the first region 121 satisfy the condition of 0 ≦ P/Q ≦ 1, and even further satisfy the condition of 0.01 ≦ P/Q ≦ 1, the shape of the spacer 800 in the first region 121 is approximately circular (as shown in fig. 2A), and since the magnitude of the liquid surface tension and the liquid level are inversely proportional to the contact length of the three-dimensional structure, the spacer 800 satisfying the above conditions can have a relatively small liquid level contact length (i.e. the perimeter 800b of the cross-sectional area 800a of the spacer 800 as shown in fig. 1E) while having a relatively large supporting area (i.e. the cross-sectional area 800a of the top of the spacer 800 as shown in fig. 1E), and the small liquid level contact length can reduce the capillary phenomenon generated by the coating liquid and improve the thickness spread of the coating liquid film, and the coating liquid staying in the first region 121 is reduced, it is also possible to further reduce the amount of reduction of the coating liquid in the display region 110 and maintain the uniform coating liquid thickness preset in the display region 110. In this way, when the first width P and the second width Q of the spacer 800 in the first region 121 satisfy the above condition, the thickness uniformity of the display region 110 and the first alignment layer 400 in the first region 121 can be improved, the generation of color mura (mura) of the image can be reduced, and the display quality of the display device can be improved.

In the embodiment, a distance D1 between the spacers 800 in the first region 121 is, for example, greater than or equal to 5 microns and less than or equal to 90 microns. Since the distance between the three-dimensional structures and the strength of the capillary phenomenon are inversely proportional, according to the embodiment of the disclosure, the distance D1 between the spacers 800 in the first region 121 is relatively small, and the shape of the spacers 800 is approximately circular, so that the effects of reducing the capillary phenomenon generated by the coating liquid, improving the uneven thickness spread of the coating liquid film layer, and improving the thickness uniformity of the first alignment layer 400 can be achieved.

In an embodiment, as shown in fig. 1A and fig. 2A, the peripheral region 120 further has a second region 123, and the second region 123 is defined as a region extending from a position 100 micrometers away from the boundary 100A to the sealant 700 to a position 800 micrometers away from the boundary 100A. In other words, the second region 123 covers a range extending from the outer periphery of the first region 121 to the direction of the sealant 700 by 700 μm, and surrounds the display region 110 and the first region 121.

In an embodiment, the spacers 800 in the second area 123 are, for example, a gap support layer (gappport) to provide a supporting effect. However, the above is an embodiment, and the spacer 800 in the second area 123 of the disclosure is not limited to the spacing support layer.

In an embodiment, as shown in fig. 2A, a distance B micrometers between the spacer 800 and the boundary 100A in the second region 123 (only one of the spacers 800 is denoted by B micrometers between the boundary 100A in the drawing as a representative example), the unit of the first width P, the second width Q, and the distance B is micrometers (μm), and the numerical values (without unit) of the first width P, the second width Q, and the distance B satisfy the following condition: P/Q ≦ (B-70)/30, 100< B ≦ 800.

For example, when the first width P and the second width Q of the spacer 800 are 100 micrometers and 6 micrometers, respectively, P/Q is 16.67. If the spacer 800 is placed in the second region 123 at a distance of 161 μm from the boundary 100A, then (B-70)/30 ═ 3, (161-70)/30 ═ 3, 3 is not greater than or equal to 16.67, and according to the embodiment of the present invention, when the spacer 800 is placed at a distance of 161 μm, the effect of the present invention cannot be achieved, which may cause an adverse effect of non-uniform thickness of the first alignment layer 400. For example, if the spacer 800 is disposed in the second region 123 at a distance of 600 μm from the boundary 100A, then (B-70)/30 is (600-70)/30 is 17.7, and 17.7 is greater than 16.67, then according to an embodiment of the present invention, when the spacer 800 is disposed at a distance of 600 μm from the boundary, the supporting effect of the spacer 800 can be achieved at the same time, and the thickness uniformity of the first alignment layer 400 can be maintained. In other words, as can be seen from the above two examples, the condition of P/Q ≦ (B-70)/30 provides a design rule for adjusting the relative relationship between the shape (P/Q) of the spacer 800 and the position (distance B) thereof, so that the above condition can be satisfied to simultaneously achieve the supporting effect of the spacer 800 and maintain the thickness uniformity of the first alignment layer 400.

In the embodiment, a distance D2 between the spacers 800 in the second region 123 is, for example, greater than or equal to 5 microns and less than or equal to 600 microns.

In an embodiment, as shown in fig. 1A, the peripheral region 120 further includes a third region 125, and the third region 125 is defined as a range extending from the outer periphery of the second region 123 to the sealant 700. In other words, the third region 125 covers a range extending from the outer periphery of the second region 123 to the sealant 700, and surrounds the display region 110, the first region 121, and the second region 123.

In the embodiment, the spacer 800 in the third region 125 is, for example, a liquid barrier layer (liquidbarrier) for blocking the alignment layer coating liquid from overflowing to the region outside the sealant 700. However, the above is an example, and the spacer 800 in the third region 125 of the present disclosure is not limited to the liquid barrier layer. The first width P and the second width Q of the spacers 800 and the spacing between the spacers 800 in the third region 125 may not satisfy the aforementioned conditions of the first region 121 and/or the second region 123.

The configurations of the first substrate 100, the color filter 200, the first electrode layer 300, the first alignment layer 400, the second substrate 500, the display layer 600, the sealant 700, and the spacer 800 according to the foregoing embodiments of the disclosure may be applied to display devices according to various embodiments.

In one embodiment, as shown in fig. 1B, the display device 10-1 further includes a pixel electrode layer 910, and the pixel electrode layer 910 is disposed on the second substrate 500. The display device 10-1 may further include a second alignment layer 920, wherein the second alignment layer 920 is disposed on the pixel electrode layer 910. In the embodiment shown in FIG. 1B, the first substrate 100 is, for example, a glass substrate, a plastic substrate or other substrates, the second substrate 500 is, for example, a thin film transistor substrate, the spacers 800 are disposed on the first substrate 100 and the color filter 200, and the display device 10-1 is, for example, a Vertical Alignment (VA) LCD device.

In another embodiment, the display device 10-1 shown in fig. 1B may not include the second alignment layer 920 (not shown), and the display device 10-1 without the second alignment layer 920 is, for example, an in-plane switching (IPS or FFS) liquid crystal display device.

In one embodiment, as shown in FIG. 1C, in the display device 10-2, the first substrate 100 is, for example, a glass substrate, the second substrate 500 is, for example, a thin film transistor substrate, the spacer 800 is disposed on the second substrate 500 (thin film transistor substrate), and the display device 10-2 is, for example, a Vertical Alignment (VA) LCD device. Similarly, the display device 10-2 not including the second alignment layer 920 is, for example, an in-plane switching (IPS or FFS) liquid crystal display device.

In one embodiment, as shown in FIG. 1D, in the display device 10-3, the first substrate 100 is, for example, a glass substrate, the second substrate 500 is, for example, a thin film transistor substrate, the color filter 200 and the spacer 800 are disposed on the second substrate 500 (thin film transistor substrate), and the display device 10-3 is, for example, a Vertical Alignment (VA) LCD device. Similarly, the display device 10-3 not including the first alignment layer 400 is, for example, an in-plane switching (IPS or FFS) liquid crystal display device.

In various embodiments shown in fig. 1B-1D, the first electrode layer 300 can be patterned locally according to a mask as shown in the drawings; the first electrode layer 300 may be designed as a whole electrode layer without a mask and extend to the frame glue edge (not shown in the drawings).

Although the present invention has been described with respect to the preferred embodiments, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.

Claims

1. A display device, comprising:

the first substrate is provided with a display area and a peripheral area, and a boundary is arranged between the display area and the peripheral area;

the color filter is arranged corresponding to the display area on the first substrate, and comprises a plurality of first pixel areas and a plurality of second pixel areas which are arranged at intervals, wherein the first pixel areas and the second pixel areas are pixel areas with different colors;

a first electrode layer disposed on the first substrate;

a first alignment layer disposed on the first electrode layer, wherein the first alignment layer corresponding to a first pixel region from the boundary into the display region has a first thickness T1, the first alignment layer corresponding to a fourth pixel region from the boundary into the display region has a second thickness T2, the units of the first thickness T1 and the second thickness T2 are micrometers (μm), and the values of the first thickness T1 and the second thickness T2 satisfy the following conditions: 0.8 ≦ T1/T2 ≦ 1.2;

a second substrate;

a display layer disposed between the first substrate and the second substrate;

the frame glue is arranged on the peripheral area and surrounds the display area; and

a plurality of spacers disposed between the first substrate and the second substrate;

the peripheral area is provided with a second area, the second area extends to a range of 800 micrometers away from the junction from a position 100 micrometers away from the junction to the frame glue, the plurality of spacers comprise a first spacer and a second spacer, the second spacer is located in the second area and is farther away from the junction than the first spacer, the first spacer has a first width along the extension direction of the junction, the second spacer has a second width along the extension direction perpendicular to the junction, the second spacer has a third width along the extension direction of the junction and has a fourth width along the extension direction perpendicular to the junction, and the ratio of the first width to the second width is smaller than the ratio of the third width to the fourth width.

2. The display device according to claim 1, wherein the peripheral region has a first region defined as a region extending from the boundary to the sealant for 100 micrometers, the plurality of spacers includes a plurality of third spacers located in the first region, one of the plurality of third spacers has a width P along the extending direction of the boundary and a width Q along the extending direction perpendicular to the boundary, the width P and the width Q are expressed in micrometers (μm), and the values of the width P and the width Q satisfy the following condition: 0 ≦ P/Q ≦ 1.

3. The display device of claim 2, wherein a first pitch between the third plurality of spacers is greater than or equal to 5 microns and less than or equal to 90 microns.

4. The display apparatus according to claim 1, wherein a first distance between a part of the plurality of spacers and the boundary is B μm, the first width P, the second width Q and the first distance B are expressed in units of μm, and the values of the first width P, the second width Q and the first distance B satisfy the following condition: P/Q ≦ (B-70)/30, 100< B ≦ 800.

5. The display device according to claim 4, wherein a second pitch between the first spacer and the second spacer is greater than or equal to 5 microns and less than or equal to 600 microns.

6. The display device of claim 1, wherein a height of the plurality of spacers is greater than or equal to 2 microns and less than or equal to 5 microns.

7. The display device of claim 1, wherein a portion of the plurality of spacers are in the peripheral region, and a third distance between the portion of spacers is greater than or equal to 25 micrometers (μm) and less than or equal to 500 micrometers (μm).

8. The display device according to claim 1, wherein a portion of the plurality of spacers is located in the peripheral region, one of the portion of spacers has a width P along an extending direction of the boundary, the plurality of spacers has a width Q along an extending direction perpendicular to the boundary, the width P and the width Q are in micrometers (μm), and the values of the width P and the width Q satisfy the following condition: 0.1 ≦ Q/P ≦ 100.

9. The display device of claim 1, further comprising:

a pixel electrode layer disposed on the second substrate; and

a second alignment layer disposed on the pixel electrode layer.