WO2014187142A1

WO2014187142A1 - Display panel and display device

Info

Publication number: WO2014187142A1
Application number: PCT/CN2013/091142
Authority: WO
Inventors: 董廷泽; 黄东升; 张千; 刘�英; 庞鲁; 管培强
Original assignee: 北京京东方光电科技有限公司
Priority date: 2013-05-24
Filing date: 2013-12-31
Publication date: 2014-11-27
Also published as: CN104181730A

Abstract

A display panel and a display device containing same. The display panel comprises a first substrate (10) and a second substrate (14) which are oppositely arranged to form a liquid crystal cell. The display panel comprises a display area (11) and a non-display area (12) disposed at the periphery of the display area (11). A first spacer (13) is arranged in the non-display area (12); a second spacer (16) is arranged in the display area (11). After the first substrate (10) and the second substrate (14) are oppositely arranged to form a liquid crystal cell, the first spacer (13) and the second spacer (16) are sustained between the first substrate (10) and the second substrate (14), and a liquid crystal cell in the non-display area (12) is thinner than a liquid crystal cell in the display area (11).

Description

Display panel and display device

Embodiments of the present invention relate to a display panel and a display device. Background technique

At present, the process of the display panel of the display panel generally involves the following steps: First, the sealant is coated on the periphery of the display area of the array substrate, and the sealant is pre-cured, and the space enclosed by the pre-cured sealant is used. The liquid crystal is filled therein, and the color filter substrate is aligned with the liquid crystal-filled array substrate, and finally the ultraviolet seal (UV) is used to further cure the sealant to complete the process of the cassette. For the display panel, when the color filter substrate and the array substrate are paired, the liquid crystal (LC) is immediately diffused to the entire display area due to being squeezed, and the sealant for sealing the liquid crystal is not fully cured. Under the impact of the liquid crystal; at the same time, because the color film substrate and the array substrate are in a vacuum environment and are pressed opposite each other, the liquid crystal impact seal frame glue is intensified, and the liquid crystal puncture phenomenon is easily generated, which may affect the display panel. Yield and picture quality. Summary of the invention

Embodiments of the present invention provide a display panel and a display device to solve the liquid crystal puncture problem and improve the yield of the display panel.

One aspect of the present invention provides a display panel including a first substrate and a second substrate that are oppositely disposed to form a liquid crystal cell. The display panel includes a display area and a non-display area on a periphery of the display area, wherein the non-display area is provided with a first spacer, and the display area is provided with a second spacer. After the first and second substrates are oppositely disposed to form a liquid crystal cell, the first spacer and the second spacer abut against the first substrate and the second substrate, and the The thickness of the non-display area is smaller than the thickness of the display area.

In one example, the first spacer has a distribution density that is less than a distribution density of the second spacer.

In one example, the first spacer has a distribution density of 80% to 95% of the distribution density of the second spacer. In one example, the height of the first spacer prior to the cartridge is lower than the height of the second spacer prior to the cartridge.

In one example, the relationship between the cell thickness h of the non-display area and the cell thickness H of the display area is H-0.5 μ ηι 1ι<Η.

In one example, the relationship between the cell thickness h of the non-display area and the cell thickness 所述 of the display area is 1ι = Η - 0.5 μ ηι.

In one example, the first spacer and the second spacer are in a single row or in multiple rows.

In one example, the spacing between the first spacers is equal or unequal, or the spacing between the second spacers is equal or unequal.

In one example, the shape of the first spacer and the second spacer comprises a cylinder, a cuboid or a cone.

In one example, the first substrate is provided with a sealant, the sealant is in a box shape to define the display area, and a spacing between the first spacer and the sealant It is 0 to 0.5 mm.

Still another aspect of the present invention provides a display device including the display panel described above. DRAWINGS

1 is a top plan view showing the structure of a display panel according to an embodiment of the present invention;

2 is a cross-sectional view along the line AA of the display panel of FIG. 1 at the beginning of the box operation; FIG. 3 is a cross-sectional view along the line AA of the display panel of FIG. 1 The display panel is oriented along the AA, after the box operation.

Display panel reference mark description:

10, the first substrate; 11, the display area; 12, the non-display area; 13, the first spacer; 14, the second substrate; 15, the frame sealant; 16, the second spacer. detailed description

The technical solutions of the embodiments of the present invention will be clearly and completely described in the following with reference to the accompanying drawings. It is apparent that the described embodiments are part of the embodiments of the invention, rather than all of the embodiments. All other embodiments obtained by a person of ordinary skill in the art based on the described embodiments of the present invention without departing from the scope of the invention are within the scope of the invention. Unless otherwise defined, technical terms or scientific terms used herein shall be of ordinary meaning as understood by those of ordinary skill in the art to which the invention pertains. The terms "first,""second," and similar terms used in the present disclosure do not denote any order, quantity, or importance, but are used to distinguish different components. Similarly, the words "a", "an" or "the" do not mean a quantity limitation, but rather mean that there is at least one. The word "comprising" or "comprises" or the like means that the element or item preceding the word is intended to encompass the element or the item recited after the word and its equivalent, and does not exclude other element or item. "Connected" or "connected" and the like are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "Upper", "Down", "Left", "Right", etc. are only used to indicate the relative positional relationship. When the absolute position of the object to be described is changed, the relative positional relationship may also change accordingly.

1 is a top plan view showing the structure of a display panel according to an embodiment of the present invention. In order to actually show the second substrate 14 on the upper side, FIG. 2 is the beginning of the operation of the display panel of FIG. FIG. 3 is a cross-sectional view along the line AA of the display panel of FIG. 1; FIG. 4 is a cross-sectional view along the line AA of the display panel of FIG. Figure. These diagrams are not drawn to the actual scale and are therefore for reference only.

Embodiments of the present invention will be further described below with reference to Figs.

The display panel according to the embodiment of the present invention includes a first substrate 10 and a second substrate 14 which are disposed opposite to form a liquid crystal cell (to the cell). The first substrate 10 and the second substrate 14 are, for example, a glass substrate or a plastic substrate on which various structural layers and functional layers (circuit layers) may be formed, which may be Color Filter Substrate or array substrate. For example, a color film layer (RGB pixel unit) is formed on the color filter substrate, and a common electrode may be further formed; a gate line, a data line, and a thin film in the pixel unit defined by the gate line and the data line are formed on the array substrate; A transistor electrode, a pixel electrode, or the like may be further formed with a common electrode or the like.

The display panel is provided with a plurality of display areas 11, and peripheral portions other than the display areas 11 are non-display areas 12, and the display areas 11 are spaced apart by the non-display areas 12. Upon completion of the predetermined manufacturing process, the display panel will be segmented to obtain a single display screen comprising a single display area 11, which in turn incorporates components such as drive circuitry to obtain the final product. The non-display area 12 is at least partially cut off during the segmentation process.

As shown in FIG. 1, a plurality of display regions 11 are surrounded and defined by a sealant 15, and a sealant 15 is used to bond the first substrate 10 and the second substrate 14. a second spacer is disposed in the display area 11 16. At least one first spacer 13 is disposed around the periphery of each display area 11 (ie, the non-display area 12). The display region 11 is filled with a liquid crystal material for display.

In the embodiment of the present invention, the first spacer 13, the second spacer 16, and the sealant 15 are formed on the second substrate 14, but the present invention is not limited thereto. For example, the first spacer 13, the second spacer 16, and the sealant 15 may be formed on the first substrate 10, and for example, the first spacer 13 and the second spacer 16 are formed on two substrates. In one case, the sealant 15 is formed on the other substrate.

In one embodiment of the present invention, before the first substrate 10 and the second substrate 14 are disposed opposite each other to obtain a liquid crystal cell, that is, the height of the first spacer 13 is performed before the operation of the cartridge (FIG. 2). M ) is smaller than the height HI of the second spacer 16 , that is, the height of the first spacer 13 is smaller than when the first substrate 10 and the second substrate 14 are opposite to the cassette (at the beginning of the cassette) The cell gap formed between the two is Η1. The cell thickness here refers to the spacing between the first substrate 10 and the second substrate 14 which are disposed opposite each other at a certain position.

The box operation was carried out under vacuum. For example, first, a liquid crystal material is dropped in a display region defined by the sealant 15, and then the second substrate 14 is placed on the first substrate 10. As shown in Fig. 2, the second substrate 14 contacts the second spacer 16 at the beginning of the operation of the cartridge. Since the vacuum exists between the first substrate 10 and the second substrate 14, the second substrate 14 is pressed toward the first substrate 10, and the second substrate 14 is first contacted with the second spacer 16 having a higher height (or may also At the same time, the sealant 15) is contacted, that is, a supporting force is generated at the second spacer 16. As shown in FIG. 3, since the height Μ of the first spacer 13 is smaller than the cell thickness HI at this time, the second substrate 14 is subjected to a downward force at a position corresponding to the spacer 13, resulting in the second substrate. 14 is lifted up around the display area 11 (as shown by the dashed box in FIG. 3), so that the second substrate 14 is slowly applied to the liquid crystal in the display area 11, which can slow down the liquid crystal to the sealant 15 The impact is such that the impact of the liquid crystal on the periphery is small, thereby avoiding the phenomenon of liquid crystal puncture, thereby improving the yield and picture quality of the display panel.

For example, the setting of the liquid crystal display panel after the box is as shown in FIG. As shown in FIG. 4, the first spacer 13 and the second spacer 16 are interposed between the first substrate 10 and the second substrate 14, that is, the first spacer 13 and the second spacer 16 abut. Between the first substrate 10 and the second substrate 14. At this time, since the height HI of the second spacer 16 before the box is greater than the height M of the first spacer 13 before the box, the second spacer 16 may be compressed to a greater extent than the first compartment in one example. The extent to which the pad 13 is compressed. The height h of the first spacer 13 after the pair of boxes (ie, the thickness of the box in the non-display area) is smaller than the first The height H of the two spacers 16 after the pair of boxes (i.e., the thickness of the box in the display area). The relationship between the cell thickness h in the non-display area and the cell thickness H in the display area may be, for example, Η-0.5μηι 1ι<Η; or the cell thickness h is 80% to 95% of the cell thickness H. For example, when 1 ι=Η-0.5 μηι, the display panel of the embodiment can more effectively avoid the liquid crystal impact sealant 15 , preventing the puncture phenomenon from occurring, and preventing other disadvantages such as the increase in the thickness unevenness of the box. influences. The number of any of the first spacer 13 and the second spacer 16 may be one or more.

In practical applications, the first spacer 13 and the second spacer 16 may be cylindrical, or may be a rectangular parallelepiped, a cone or other support structure capable of supporting, and the first spacer 13 The specific size of the second spacer 16 can also be set according to the actual application scenario.

It should be noted that when there are a plurality of first spacers 13 and second spacers 16, the height uniformity of each of the first spacers 13 and the second spacers 16 can be ensured as much as possible. Further, for example, in an example, the heights of the plurality of first spacers 13 before the cartridge may be set to have different heights of two or more than the cartridge thickness HI when the cartridge is paired. Further, the first spacer 13 may be disposed at any position of the non-display area of the display panel, for example, as close as possible to the position where the sealant 15 is provided on the first substrate 10. For example, the space between the first spacer 13 on the first substrate 10 and the sealant 15 to be disposed may be 0 to 0.5 mm.

In another embodiment of the present invention, the first spacer 13 and the second spacer 16 have the same height before the operation of the cassette, but the distribution density of the first spacer 13 (ie, the septum per unit area) The number of objects is smaller than the distribution density of the second spacer 16. For example, the distribution density of the first spacers 13 is 80% to 95% of the distribution density of the second spacers 16. Since the distribution density of the first spacers 13 in the non-display area 12 is lower than the distribution density of the second spacers 16 in the display area 11, the first spacers 13 are in the unit area during the process of the cassette. The supporting force that can be provided is less than the supporting force that the second spacer 16 can provide in a unit area, whereby the degree of compression becomes larger than that of the second spacer 16. This also causes the second substrate 14 to be lifted up around the display area 11, so that the thickness of the non-display area 12 after the cassette is smaller than the thickness of the display area 11. At this time, the relationship between the cell thickness h in the non-display area and the cell thickness H in the display area may be, for example, Η-0.5μηι 1ι<Η; or the cell thickness h may be 80% to 95% of the cell thickness H. Therefore, the second substrate 14 slowly applies force to the liquid crystal in the display region 11, which can slow down the impact of the liquid crystal on the sealant 15 and avoid liquid crystal puncture, thereby improving the yield and picture quality of the display panel. .

In still another embodiment of the present invention, combining the first spacer and the second in the above two embodiments The spacers are disposed such that the height and distribution density of the first spacers before the cassette are smaller than the height and distribution density of the second spacers before the cassette, thereby making the box thickness h of the non-display area after the cassette smaller than The thickness H of the display area can slow down the impact of the liquid crystal on the sealant 15 and avoid the phenomenon of liquid crystal puncture, thereby improving the yield and picture quality of the display panel.

Further, in the embodiment of the present invention, the first spacers 13 in the non-display area may be arranged in a single row or in multiple rows; the spacing between each of the two first spacers 13 may be equal or Not equal, can be set as needed. The first spacer 13 and the second spacer 16 may be a non-metal material (e.g., a resin material, a rubber material) or a metal material, for example, by a photolithography method, printing, or the like.

The embodiment of the invention further provides a display device, which may include the display panel provided by the embodiment of the invention described above.

In summary, in the embodiment of the present invention, since the spacer is disposed in both the display area and the non-display area of the display panel, and the box thickness in the non-display area after the box is smaller than the box in the display area Thick, so even if the two substrates constituting the display panel are pressed toward each other due to the presence of a vacuum, the other substrate on which the spacer is not disposed is subjected to a downward force at a position corresponding to the non-display area, resulting in display. The periphery of the region is lifted up, so that the other substrate is slowly applied to the liquid crystal in the display region, thereby slowing the impact of the liquid crystal on the sealant that defines the display region, thereby avoiding liquid crystal puncture, thereby improving Display panel yield and picture quality.

The above description is only for the embodiments of the present invention and is not intended to limit the scope of the present invention. It should be noted that a number of modifications and refinements may be made by those skilled in the art without departing from the principles of the invention, and such modifications and refinements are also considered to be within the scope of the invention.

Claims

claims

1. A display panel, including a first substrate and a second substrate arranged oppositely to form a liquid crystal cell, wherein the display panel includes a display area and a non-display area around the display area, the non-display area A first spacer is provided in the display area, and a second spacer is provided in the display area. After the first and second substrates are relatively arranged to form a liquid crystal cell, the first spacer and the The second spacer abuts between the first substrate and the second substrate, and the cell thickness of the non-display area is smaller than the cell thickness of the display area.

2. The display panel of claim 1, wherein the distribution density of the first spacers is smaller than the distribution density of the second spacers.

3. The display panel of claim 2, wherein the distribution density of the first spacers is 80% to 95% of the distribution density of the second spacers.

4. The display panel of claim 1, wherein the height of the first spacer before box alignment is lower than the height of the second spacer before box alignment.

5. The display panel according to any one of claims 1 to 4, wherein the relationship between the cell thickness h of the non-display area and the cell thickness H of the display area is H-0.5μm<h<H.

6. The display panel according to claim 5, wherein the relationship between the cell thickness h of the non-display area and the cell thickness H of the display area is 1=H-0.5μm.

7. The display panel according to any one of claims 1 to 6, wherein the first spacers and the second spacers are in a single row or in multiple rows.

8. The display panel according to any one of claims 1 to 7, wherein the spacing between the first spacers is equal or unequal, or the spacing between the second spacers is equal or unequal.

9. The display panel according to any one of claims 1 to 8, wherein the shapes of the first spacer and the second spacer include a cylinder, a cuboid or a cone.

10. The display panel according to any one of claims 1 to 9, wherein a frame sealing glue is provided on the first substrate, and the frame sealing glue is in a square frame shape to define the display area, and the first substrate is provided with a frame sealing glue. The distance between the spacer and the frame sealing glue is 0 to 0.5 mm.

11. A display device, including the display panel according to any one of claims 1 to 10.