CN113885259A

Movatterモバイル変換

Info

Publication number: CN113885259A
Application number: CN202111226030.0A
Authority: CN
Inventors: 陈政雄; 王兆祥; 陈奕静
Original assignee: Innolux Display Corp
Current assignee: Innolux Corp
Priority date: 2014-06-03
Filing date: 2014-06-03
Publication date: 2022-01-04
Also published as: CN105137663A

Abstract

本发明提供一种显示面板，包括一第一基板、一第二基板、一显示介质层以及多个第一间隔物及多个第二间隔物。第一基板具有一显示区及环设于显示区的一非显示区。第二基板与第一基板相对设置。显示介质层设置于第一基板与第二基板之间。多个第一间隔物及多个第二间隔物分别设置于第一基板与第二基板之间，并对应于非显示区设置，该多个第一间隔物与该多个第二间隔物对应位于显示区的相对两侧，并分别沿一第一方向排列，其中，一延伸线沿着垂直第一方向的一第二方向通过该多个第一间隔物的其中之一，且通过任两相邻的该多个第二间隔物之间。通过本发明，可改善显示区的边缘处因亮度不均所产生的亮暗条纹现象，以及显示面板的间隙均匀度而降低亮暗条纹的现象。

The present invention provides a display panel including a first substrate, a second substrate, a display medium layer, a plurality of first spacers and a plurality of second spacers. The first substrate has a display area and a non-display area surrounding the display area. The second substrate is disposed opposite to the first substrate. The display medium layer is disposed between the first substrate and the second substrate. A plurality of first spacers and a plurality of second spacers are respectively disposed between the first substrate and the second substrate and corresponding to the non-display area, and the plurality of first spacers correspond to the plurality of second spacers are located on opposite sides of the display area and are respectively arranged along a first direction, wherein an extension line passes through one of the plurality of first spacers along a second direction perpendicular to the first direction, and passes through any two between the adjacent plurality of second spacers. The present invention can improve the phenomenon of bright and dark stripes at the edge of the display area due to uneven brightness, and the phenomenon of reducing bright and dark stripes due to the uniformity of the gap of the display panel.

Description

Display panel

The application is applied on 6, month and 3 days in 2014, has the application number of 201410241882.0 and is named as a display surfaceDivision of the Chinese patent application for BoardApplication for

Technical Field

The present invention relates to a display panel, and more particularly, to a display panel with photo spacers.

Background

With the development of technology, flat panel display devices have been widely used in various fields, especially liquid crystal display devices or organic light emitting diode display devices, and have superior characteristics of light weight, low power consumption and no radiation, so that they have gradually replaced conventional cathode ray tube display devices and are applied to various electronic products, such as mobile phones, portable multimedia devices, notebook computers or televisions, etc.

Taking a liquid crystal display device as an example, a conventional liquid crystal display device includes a liquid crystal display Panel (LCD Panel) and a Backlight Module (Backlight Module) disposed opposite to each other. The liquid crystal display panel mainly comprises a color filter substrate, a thin film transistor substrate and a liquid crystal layer clamped between the two substrates. The color filter substrate is disposed opposite to the thin film transistor substrate, and has a plurality of spacers (spacers) for maintaining a gap between the color filter substrate and the thin film transistor substrate. The color filter substrate, the thin film transistor substrate and the liquid crystal layer can form a plurality of pixel units which are arranged in an array. The backlight module can emit light rays to pass through the liquid crystal display panel, and the color is displayed through each pixel unit of the liquid crystal display panel to form an image.

In the conventional wide viewing angle technology of the liquid crystal display panel, in order to control the tilt direction of the liquid crystal molecules, a Rubbing (Rubbing) process is used to generate a certain alignment direction for the alignment layers disposed on the color filter substrate and the thin film transistor substrate. However, in the process of back and forth coating of Rubber (Rubber), the corresponding arrangement of the two sides of the non-display area and the edge of the display area will cause the phenomenon of generating dark streaks (i.e. Rubber mura) at the edge due to uneven Rubber due to the regular arrangement of the spacers (spacers).

In addition, due to the symmetrical arrangement of the spacers on both sides of the non-display area, the bright stripes (i.e., edge mura) formed by the gaps (Cell gap) between the two substrates in the edge area of the display area corresponding to the positions of the spacers are more obvious.

Therefore, it is an important subject to provide a display panel that can improve the peeling Mura phenomenon and improve the gap uniformity of the display panel to reduce the edge Mura of the display area.

Disclosure of Invention

In view of the foregoing, it is an object of the present invention to provide a display panel capable of improving the peeling Mura phenomenon and improving the gap uniformity of the display panel to reduce the edge Mura of the display area.

To achieve the above objective, a display panel according to the present invention includes a first substrate, a second substrate, a display medium layer, a plurality of first spacers and a plurality of second spacers. The first substrate is provided with a display area and a non-display area which is arranged around the display area. The second substrate is arranged opposite to the first substrate. The display medium layer is arranged between the first substrate and the second substrate. The first spacers and the second spacers are respectively arranged between the first substrate and the second substrate and are arranged corresponding to the non-display area, and the first spacers and the second spacers are correspondingly arranged at two opposite sides of the display area and are respectively arranged along a first direction. An extension line passes through one of the first spacers along a second direction perpendicular to the first direction and passes between any two adjacent second spacers.

To achieve the above objective, a display panel according to the present invention includes a first substrate, a second substrate, a display medium layer, a plurality of first spacers and a plurality of second spacers. The first substrate is provided with a display area and a non-display area which is arranged in the display area in a surrounding mode, the display area is provided with a symmetry axis which is parallel to a first direction, and two opposite sides of the symmetry axis are a first side and a second side respectively. The second substrate is arranged opposite to the first substrate. The display medium layer is arranged between the first substrate and the second substrate. The first spacers and the second spacers are respectively arranged between the first substrate and the second substrate and are arranged corresponding to the non-display area, the first spacers are correspondingly arranged on the first side, the second spacers are correspondingly arranged on the second side, and the first spacers and the second spacers are respectively arranged along the first direction. When the first spacers corresponding to the first side are mirrored to the second side by taking the symmetry axis as the center, the first spacers and the second spacers are staggered and do not overlap.

In an embodiment, the display panel further includes a black matrix layer disposed on the first substrate or the second substrate, the black matrix layer covering the non-display region.

In an embodiment, the display panel further includes a color filter layer disposed on the first substrate or the second substrate, and the color filter layer covers the display region correspondingly.

In one embodiment, the first spacers or the second spacers are periodically arranged along the first direction.

In one embodiment, the first spacers or the second spacers are periodically arranged along the second direction.

In an embodiment, the display panel further includes a plurality of scan lines and a plurality of data lines, the scan lines and the data lines define a plurality of pixels, and the pixels are arranged in a matrix shape formed by a first direction and a second direction.

In one embodiment, the first direction is substantially parallel to the extending direction of the data lines, and the second direction is substantially parallel to the extending direction of the scan lines.

In one embodiment, the first direction is substantially parallel to the extending direction of the scan lines, and the second direction is substantially parallel to the extending direction of the data lines.

In an embodiment, a width of the first spacers or the second spacers along the second direction is smaller than a width of each of the pixels along the second direction.

In one embodiment, the extension line passes between two adjacent pixels.

In one embodiment, an extension line passes through the pixels.

In an embodiment, the display panel further includes a plurality of third spacers disposed between the first substrate and the second substrate, and the third spacers are disposed along the second direction corresponding to two adjacent pixels.

In one embodiment, the first spacers corresponding to the first side are defined to form a plurality of first spaced objective spots when being mirrored to the second side by taking the symmetry axis as a center, and a distance from one second spacer to another adjacent second spacer along the first direction is greater than a distance from one second spacer to the adjacent first spaced objective spot along the first direction.

In summary, in the display panel of the present invention, the first spacers and the second spacers are disposed corresponding to the non-display area, and the first spacers and the second spacers are disposed at two opposite sides of the display area, and when the extension line passes through one of the first spacers along a second direction perpendicular to the first direction, the extension line passes through between any two adjacent second spacers; or the display area has a symmetry axis parallel to the first direction, the first spacers and the second spacers are correspondingly arranged on the first side and the second side of the symmetry axis, and when the first spacers corresponding to the first side are mirrored to the second side by taking the symmetry axis as the center, the first spacers and the second spacers are staggered and do not overlap. Therefore, compared with the existing liquid crystal display panel, the spacers corresponding to the two sides of the non-display area in the display panel are arranged in a staggered manner, so that the display panel can improve the bright and dark stripe phenomenon (improvement of scattering mura) caused by uneven brightness at the edge of the display area, and also improve the gap uniformity of the display panel to reduce the bright and dark stripe phenomenon (improvement of edge mura).

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 schematic diagram of a display panel according to a preferred embodiment of the invention;

FIG. 1B is a schematic cross-sectional view of the display panel of FIG. 1A along line A-A;

FIG. 1C is a schematic diagram of a display panel according to another aspect of the preferred embodiment of the invention;

fig. 2A to fig. 2F are schematic views of display panels according to different embodiments of the present invention.

Fig. 3 is a schematic diagram of a display device according to a preferred embodiment of the invention.

FIGS. 1A-3 are numbered as follows:

1. 1a to 1f, 3: display panel

11: first substrate

12: second substrate

13: display medium layer

14: filter layer

2: display device

4: backlight module

A1: first side

A2: second side

AA: display area

AS: axis of symmetry

A-A: straight line

B. G, R: light filter part

BB: non-display area

BM: black matrix layer

D1, D2: distance between two adjacent plates

E: light ray

L: extension line

P: pixel

S1: first spacer, first spacer objective spot

S2: second spacer

S3: third spacer

X: second direction

Y: a first direction

Z: third direction

Z1, Z2: light-shielding section

Detailed Description

Hereinafter, a display panel according to a preferred embodiment of the present invention will be described with reference to the accompanying drawings, in which like elements are described with like reference numerals.

Referring to fig. 1A and fig. 1B, wherein fig. 1A is a schematic view of adisplay panel 1 according to a preferred embodiment of the invention, and fig. 1B is a schematic cross-sectional view of a straight line a-a in fig. 1A.

Thedisplay panel 1 may be a liquid crystal display panel or an organic light emitting diode display panel, and herein, the liquid crystal display panel is taken as an example. For the following description, fig. 1A only shows the configuration of afirst substrate 11, a display area AA, a non-display area BB, a plurality of pixels P, a plurality of first spacers S1, a plurality of second spacers S2, and a plurality of third spacers S3 of thedisplay panel 1, and other elements of thedisplay panel 1 are not shown. In addition, fig. 1A and 1B show a first direction Y (vertical direction in fig. 1A), a second direction X (horizontal direction in fig. 1A), and a third direction Z, wherein the first direction Y, the second direction X, and the third direction Z are substantially perpendicular to each other two by two.

Thedisplay panel 1 includes afirst substrate 11, asecond substrate 12 and adisplay medium layer 13. Thefirst substrate 11 and thesecond substrate 12 are disposed opposite to each other, and thedisplay medium layer 13 is disposed between thefirst substrate 11 and thesecond substrate 12. Thefirst substrate 11 has a display area AA (active area) and a non-display area BB surrounding the display area AA. Here, the display area AA is an area where light can pass through thefirst substrate 11. Thefirst substrate 11 and thesecond substrate 12 can be made of a transparent material, and can be, for example, a glass substrate, a quartz substrate, or a plastic substrate, which is not limited in the invention.

Thedisplay medium layer 13 of the present embodiment is a liquid crystal layer and has a plurality of liquid crystal molecules (not shown). In addition, thedisplay panel 1 of the present embodiment may further include a thin film transistor layer (not shown) disposed on thesecond substrate 12. However, in another embodiment, if thedisplay panel 1 is an organic light emitting diode display panel, thedisplay medium layer 13 may be an organic light emitting layer, and in this case, thefirst substrate 11 may be a Cover plate (Cover plate) to protect the organic light emitting layer from being contaminated by external moisture or foreign matters.

Thedisplay panel 1 may further include a plurality of scan lines (not shown) and a plurality of data lines (not shown), wherein the scan lines and the data lines define a plurality of pixels P, and the pixels P are disposed between thefirst substrate 11 and thesecond substrate 12. As shown in fig. 1A, the pixels P may be arranged in a matrix shape formed by a first direction Y and a second direction X. In this embodiment, the first direction Y is substantially parallel to the extending direction of the data lines, the second direction X is substantially parallel to the extending direction of the scan lines, and the third direction Z is the other direction perpendicular to the first direction Y and the second direction X.

In addition, thedisplay panel 1 may further include a black matrix layer BM and afilter layer 14. The black matrix layer BM is disposed on thefirst substrate 11 or thesecond substrate 12 and has a light-shielding section Z1, and the light-shielding section Z1 is disposed to cover the non-display area BB. In addition, thefilter layer 14 of the embodiment is disposed on a side of thefirst substrate 11 facing thesecond substrate 12, or disposed on thesecond substrate 12, and thefilter layer 14 is disposed corresponding to a position covering the display area AA. Since the black matrix layer BM is made of opaque material, an opaque region (i.e., the non-display region BB) can be formed on thefirst substrate 11, and a transparent region (i.e., the display region AA) can be defined. In addition, the black matrix layer BM may further have a plurality of light shielding sections Z2. One pixel P may correspond to one optical filter portion, and a light-shielding section Z2 may be disposed between two adjacent optical filter portions (e.g., between the optical filter portion R and the optical filter portion G, between the optical filter portion G and the optical filter portion B, and between the optical filter portion B and the optical filter portion R). The black matrix layer BM and the filter layer 14 (having a plurality of the filter portions R, G, B) are disposed on thefirst substrate 11, but in other embodiments, the black matrix layer BM or thefilter layer 14 may be disposed on thesecond substrate 12, so as to be a black matrix on array (BOA) substrate or a color filter on array (COA) substrate. And are not intended to be limiting. In addition, thedisplay panel 1 may further include a protection layer (e.g., an over-coating (not shown)), which may cover the black matrix layer BM and the light filter R, G, B. The material of the passivation layer may be a photoresist material, a resin material, or an inorganic material (such as SiOx/SiNx), etc. for protecting the black matrix layer BM and the filter R, G, B from being damaged by the subsequent processes.

Therefore, in this embodiment, when the scan lines of thedisplay panel 1 receive a scan signal, a thin film transistor corresponding to each scan line can be turned on, and a data signal corresponding to each row of pixels is transmitted to the pixel electrodes of the corresponding pixels P through the data lines, so that thedisplay panel 1 can display a picture.

In addition, thedisplay panel 1 further includes a plurality of first spacers S1 and a plurality of second spacers S2, and the first spacers S1 and the second spacers S2 are respectively disposed between thefirst substrate 11 and thesecond substrate 12 and are disposed corresponding to the non-display area BB. It should be noted that the first spacer S1 and the second spacer S2 of the present invention are disposed corresponding to the non-display area BB, but not corresponding to the position of thefilter layer 14. In other words, when thefirst substrate 11 is viewed from the third direction Z, if part of the light filter portion R, G, B around the display area AA is shielded by the black matrix layer BM, although there may be spacers disposed along the first direction Y at the corresponding positions of the light filter portion R, G, B shielded by the black matrix layer BM, these spacers are not the first spacer S1 or the second spacer S2.

The first spacers S1 and the second spacers S2 of the present embodiment are disposed in the non-display area BB, and are closest to the edge of the display area AA along the second direction X. The first spacers S1 are located at the left side of the display area AA, and the second spacers S2 are located at the right side of the display area AA. In addition, thedisplay panel 1 may further include a plurality of third spacers S3, the third spacers S3 are disposed between thefirst substrate 11 and thesecond substrate 12, and the third spacers S3 are disposed along the second direction X corresponding to two adjacent pixels P, so that the third spacers S3 correspond to spacers located in the display area AA. The first spacer S1, the second spacer S2, and the third spacer S3 can maintain a gap between thefirst substrate 11 and thesecond substrate 12, so that the display medium layer 13 (e.g., liquid crystal molecules of the liquid crystal layer) can fill the gap and be sandwiched between the two substrates.

In addition, the first spacers S1 and the second spacers S2 of the present embodiment are periodically arranged along the first direction Y, and the first spacers S1 and the second spacers S2 are also periodically arranged along the second direction X. However, in other embodiments, the first spacers S1 or the second spacers S2 may not be periodically arranged along the first direction Y or the second direction X. In addition, the width of each of the first spacers S1 or each of the second spacers S2 in the second direction X is smaller than the width of one pixel P in the second direction X.

When an extension line L passes through one of the first spacers S1 along the second direction X, the extension line L passes between two of the second spacers S2. In the present embodiment, as shown in fig. 1A, the extension line L passes through the first spacers S1 and passes through an entire column of pixels P, and does not pass through any of the second spacers S2, so that the first spacers S1 and the second spacers S2 are staggered (not on the same extension line L) along the second direction X.

In other words, please refer to fig. 1C, which is another schematic diagram of thedisplay panel 1. The display area AA of thefirst substrate 11 may have a symmetry axis AS parallel to the first direction Y, and two sides of the symmetry axis AS are respectively defined AS a first side a1 and a second side a 2. Here, the "symmetry axis" indicates that the pixels P located on both sides of the symmetry axis AS are completely symmetrical in the left-right direction on the display area AA (the pixels P on both sides of the symmetry axis AS are equal in number and symmetrical in the left-right direction). The first spacers S1 and the second spacers S2 are correspondingly disposed in the non-display area BB, wherein the first spacers S1 are correspondingly disposed on the first side a1, the second spacers S2 are correspondingly disposed on the second side a2, and the first spacers S1 and the second spacers S2 are periodically arranged along the first direction Y. Therefore, when the first spacers S1 corresponding to the first side a1 are mirrored to the second side a2 by taking the symmetry axis AS the center, the first spacers S1 and the second spacers S2 are disposed in a staggered manner, and no overlapping occurs. In addition, when the extension line L passes through one of the first spacers S1 along the second direction X perpendicular to the first direction Y, the extension line L also passes between two of the second spacers S2. In addition, when the first spacers S1 corresponding to the first side a1 are mirrored to the second side a2 by taking the axis of symmetry AS the center, AS shown in fig. 1C, a plurality of first spaced objective lens spots (also denoted AS S1) are formed, and the distance D1 between two adjacent second spacers S2 along the first direction Y is greater than the distance D2 between one second spacer S2 and the adjacent first spaced objective lens spot S1 along the first direction Y (D1 > D2). In addition, other technical features of thedisplay panel 1 in fig. 1C can refer to the description of fig. 1A and fig. 1B, and are not repeated herein.

Fig. 2A to 2F are schematic views ofdisplay panels 1a to 1F according to different embodiments of the present invention.

As shown in fig. 2A, the display panel 1A is different from thedisplay panel 1 of fig. 1A mainly in that an extension line L extending along the second direction X passes through the first spacers S1 and between two adjacent pixels P (the two adjacent pixels P can be shielded by the light shielding section Z2 of the black matrix layer BM), and passes through two adjacent second spacers S2. In addition, other technical features of thedisplay panel 1a can refer to the same elements of thedisplay panel 1, and are not described in detail.

As shown in fig. 2B, the display panel 1B is different from the

display panels

1 and 1a mainly in that the distribution density of the first spacers S1 of the display panel 1B is twice that of the first spacers S1 of thedisplay panel 1a, and the distribution density of the second spacers S2 is twice that of the second spacers S2 of thedisplay panel 1. However, in different embodiments, only the distribution density of the first spacers S1 may be twice that of thedisplay panel 1a, only the distribution density of the second spacers S2 may be twice that of thedisplay panel 1, or the multiple thereof is not limited to be twice. In addition, other technical features of thedisplay panel 1b can refer to the same elements of the

display panels

1 and 1a, and are not described in detail.

In addition, as shown in fig. 2C, the display panel 1C is different from the display panel 1B of fig. 2B mainly in that the distribution density of the first spacers S1 of the display panel 1C along the first direction Y is 1/2 times that of the first spacers S1 of the same row of the display panel 1B along the first direction Y, and the distribution density of the second spacers S2 of the display panel 1C along the first direction Y is 1/2 times that of the second spacers S2 of the same row of the display panel 1B along the first direction Y. In addition, the first spacers S1 and the second spacers S2 of two adjacent rows are staggered along the first direction Y. In addition, other technical features of thedisplay panel 1c can refer to the same elements of thedisplay panel 1b, and are not described in detail.

As shown in fig. 2D, the display panel 1D is different from the display panel 1C of fig. 2C mainly in that, in the third direction Z, part of the filter layer 14 (outer periphery) of the display panel 1D is shielded by the light shielding section Z1 of the black matrix BM, so that the area of the non-display area BB also corresponds to thefilter layer 14 including part of thefilter layer 14 shielded by the light shielding section Z1, and the display area AA corresponds to the area where thefilter layer 14 is not shielded by the light shielding section Z1. In addition, other technical features of thedisplay panel 1d can refer to the same elements of thedisplay panel 1c, and are not described in detail.

As shown in fig. 2E, the display panel 1E is different from thedisplay panel 1 in fig. 1A mainly in that the display panel 1E has two first spacers S1 in the width of one pixel P and two second spacers S2 in the width of one pixel P along the first direction Y, and the first spacers S1 and the second spacers S2 are arranged in a staggered manner along the first direction Y. In addition, other technical features of thedisplay panel 1e can refer to the same elements of thedisplay panel 1, and are not described in detail.

As shown in fig. 2F, the display panel 1F is different from thedisplay panel 1 of fig. 1A mainly in that the first direction Y of the display panel 1F is substantially parallel to the extending direction of the scan lines, and the second direction X is substantially parallel to the extending direction of the data lines. In other words, the first spacers S1 and the second spacers S2 of the present embodiment are located at the upper and lower sides of thedisplay panel 1f, and the extension line L passes through the first spacers S1 and between the two second spacers S2 along the second direction X from top to bottom. In addition, other technical features of thedisplay panel 1f can refer to the same elements of thedisplay panel 1, and are not described in detail.

It should be noted that, in all the above embodiments, the number, distribution density and arrangement of the first spacers S1 and the second spacers S2 are only examples and are not intended to limit the present invention.

Fig. 3 is a schematic view of adisplay device 2 according to a preferred embodiment of the invention.

Thedisplay device 2 includes adisplay panel 3 and a Backlight Module 4(Backlight Module), and thedisplay panel 3 and the Backlight Module 4 are disposed opposite to each other. Thedisplay device 2 is a liquid crystal display device, and thedisplay panel 3 includes one of the

display panels

1 and 1a to 1f, and the specific technical contents thereof can be referred to above and will not be described further. When the light E emitted from the backlight module 4 passes through thedisplay panel 3, colors can be displayed by each pixel of thedisplay panel 3 to form an image.

The foregoing is by way of example only, and not limiting. It is intended that all equivalent modifications or variations not departing from the spirit and scope of the present invention be included in the claims.