CN215526294U

CN215526294U - Display panel and display device

Info

Publication number: CN215526294U
Application number: CN202122309196.0U
Authority: CN
Inventors: 卢劲松; 洪文进; 许哲豪; 康报虹
Original assignee: HKC Co Ltd; Beihai HKC Optoelectronics Technology Co Ltd
Current assignee: HKC Co Ltd; Beihai HKC Optoelectronics Technology Co Ltd
Priority date: 2021-09-23
Filing date: 2021-09-23
Publication date: 2022-01-14
Anticipated expiration: 2031-09-23

Abstract

The application is suitable for the technical field of display, and provides a display panel and a display device. The display panel comprises a display area and a sealing area, the display panel comprises a color film substrate, an array substrate, a first polarizing plate located on one side, away from the array substrate, of the color film substrate, a second polarizing plate located on one side, away from the color film substrate, of the array substrate, and frame glue connected with the color film substrate and the array substrate, the frame glue is located in the sealing area, a black matrix is formed in the display area of the color film substrate, a light shielding layer is formed between the first polarizing plate and the color film substrate or between the second polarizing plate and the array substrate, and the light shielding layer is arranged around the display area. The display device comprises a shell, a backlight module and a display panel, wherein the backlight module and the display panel are arranged on the shell, and the display panel is positioned on the light emitting side of the backlight module. The application provides a display panel and display device, has compromise frame and glue solidification requirement and self design requirement.

Description

Display panel and display device

Technical Field

The application belongs to the technical field of display, and particularly relates to a display panel and a display device.

Background

A Thin Film Transistor-Liquid Crystal Display (TFT-LCD) is a mainstream product of a Display device at present due to its advantages of lightness, thinness, energy saving, high Display quality, mature and stable manufacturing process, and the like. When the tft liquid crystal display device is manufactured, after the array substrate and the color film substrate are aligned and bonded in a vacuum state with high precision, Ultraviolet (UV) light source irradiation is immediately performed on the bonded glass sealant portion to cure the sealant, and the sealant curing rate in this step is usually 70% to 80%, so as to prevent liquid crystal contamination or leakage caused by contact between the liquid crystal and the sealant.

In the above operation process, the UV light source may irradiate from the color filter substrate side or from the array substrate side, but the size of the sealing area of the display device needs to be large to be unsuitable for a narrow frame product when irradiating from the color filter substrate side, and a higher requirement is provided for the design of the metal line structure on the array substrate when irradiating from the array substrate side. Therefore, the current display panel and display device cannot well take the curing of the frame glue and the design requirements of the display panel and the display device into consideration.

SUMMERY OF THE UTILITY MODEL

An object of the application is to provide a display panel and a display device, which aim to solve the technical problem that the display panel and the display device cannot well take into account of the solidification of frame glue and the design requirement of the display panel and the display device.

The display panel comprises a display area and a sealing area, wherein the display panel comprises a color film substrate, an array substrate, a first polarizing plate located on one side of the color film substrate, a second polarizing plate located on one side of the array substrate, and frame glue connected with the color film substrate and the array substrate, wherein the color film substrate deviates from the first polarizing plate, the second polarizing plate located on one side of the array substrate deviates from the second polarizing plate, the frame glue is located in the sealing area, a black matrix is formed in the display area of the color film substrate, a light shielding layer is formed between the first polarizing plate and the color film substrate or between the second polarizing plate and the array substrate, and the light shielding layer is arranged around the display area.

In an optional embodiment, a space is provided between the sealant and the black matrix.

In an optional embodiment, an orthogonal projection of the light shielding layer on the surface of the black matrix has an overlapping region with the black matrix.

In an alternative embodiment, the width of the overlap region is 3-10 μm.

In an alternative embodiment, the light-shielding layer has a thickness of 1-3 μm.

In an alternative embodiment, the pencil hardness of the light-shielding layer is greater than or equal to 2B.

In an optional embodiment, the light-shielding layer is a black ink layer.

In an alternative embodiment, the first polarizer has a size corresponding to that of the color film substrate, and the second polarizer has a size corresponding to that of the array substrate.

In an optional embodiment, a metal line structure is formed in the sealing area on the side of the array substrate opposite to the color film substrate, and the sealant is formed on the metal line structure.

In a second aspect, a display device is provided, which includes a housing, a backlight module disposed in the housing, and a display panel provided by the above embodiments, where the display panel is located on a light emitting side of the backlight module.

According to the display panel and the display device provided by the embodiment of the application, the black matrix is only manufactured in the display area of the color film substrate, and the black matrix is not manufactured in the sealing area, so that the whole area of the sealing area of the color film substrate can be used as a light transmission area, UV light can enter the area between the color film substrate and the array substrate from the light transmission area on the color film substrate side, the frame glue curing between the color film substrate and the array substrate is further realized, and the size of the sealing area is not required to be increased. Meanwhile, UV light is irradiated from the side of the color film substrate, so that the substrate after the color film substrate and the array substrate are combined can be prevented from being turned over up and down, the manufacturing beat of the display panel is improved, and the manufacturing cost is reduced; the mutual displacement of the substrates after the color film substrate and the array substrate are paired in the vertical overturning process can be avoided, so that the phenomenon of frame glue puncture or uneven peripheral brightness is avoided.

The display panel and the display device provided by the embodiment of the application are suitable for UV light to irradiate from the side of the color film substrate, and are beneficial to the design of a narrow-frame display panel, namely, the curing of frame glue and the design requirement of the frame glue are considered at the same time.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings needed to be used in the description of the embodiments of the present application will be briefly described below, and it is obvious that the drawings described below are only some embodiments of the present application, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without creative efforts.

Fig. 1 is a schematic structural diagram of a color film substrate according to a first embodiment of the present disclosure;

fig. 2 is a schematic cross-sectional view illustrating a sealing area of a display panel according to an embodiment of the present disclosure;

fig. 3 is a schematic cross-sectional view illustrating a sealing area of a display panel according to an embodiment of the present disclosure;

fig. 4 is a schematic view illustrating illumination when a display panel is cured by a sealant frame according to an embodiment of the present disclosure, in which an arrow direction is a UV light irradiation direction;

fig. 5 is a schematic structural diagram of relative positions of a black matrix and a light-shielding layer in a display panel provided in the second embodiment of the present application;

fig. 6 is a schematic top view of a display panel according to a second embodiment of the present disclosure, in which a first polarizer is not shown;

fig. 7 is a schematic block diagram of a display device provided in the third embodiment of the present application.

Description of reference numerals:

100. a display panel; 110. a color film substrate; 111. a black matrix; 112. a display area; 113. a sealing zone; 120. an array substrate; 121. a metal line structure; 130. frame glue; 140. a first polarizing plate; 150. a second polarizing plate; 160. a light-shielding layer; 170. an overlap region; 200. an ultraviolet ray prevention cover; 300. a housing; 400. a backlight module is provided.

Detailed Description

Reference will now be made in detail to embodiments of the present application, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary and intended to be used for explaining the present application and should not be construed as limiting the present application.

In the description of the present application, it is to be understood that the terms "length," "width," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like, as used herein, refer to an orientation or positional relationship indicated in the drawings, which is for convenience and simplicity of description, and does not indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and thus, is not to be considered as limiting.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present application, "a plurality" means two or more unless specifically limited otherwise.

In this application, unless expressly stated or limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can include, for example, fixed connections, removable connections, or integral parts; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.

In order to make the objects, technical solutions and advantages of the present application more apparent, the present application is described in further detail below with reference to the accompanying drawings and embodiments.

Example one

Referring to fig. 2 and fig. 3, the present embodiment provides a display panel 100, which includes a display area and a sealing area. Specifically, the display panel 100 In the present embodiment may be any one of a VA (Vertical Alignment, multi-domain Vertical Alignment) type, a TN (Twisted Nematic), an IPS (In-Plane-Switching), an FFS (Fringe Field Switching) type, and other TFT-LCDs. The display area and the sealing area are divided in the same manner as a general display panel. Since the display area is not modified and is known in the art, only the cross-sectional views of the components in the sealing area are shown in fig. 2 and 3, and the distribution of the components in the display area is not shown.

The display panel 100 includes a color film substrate 110, an array substrate 120, a first polarizing plate 140 located on a side of the color film substrate 110 away from the array substrate 120, a second polarizing plate 150 located on a side of the array substrate 120 away from the color film substrate 110, and a sealant 130 connecting the color film substrate 110 and the array substrate 120. The sealant 130 is located in the sealing region 113. As shown in fig. 1, a black matrix 111 is formed in the display region 112 of the color filter substrate 110. Specifically, the black matrix 111 is formed on one surface of the color film substrate 110, and the setting manner is the same as the setting manner of the black matrix in the display area of the common color film substrate, which is not described herein again. In the color filter substrate 110 provided in this embodiment, the black matrix 111 is not disposed in the sealing region 113, that is, the sealing region 113 of the color filter substrate 110 is completely transparent and is Bare Glass (Bare Glass), and the whole region can be used as a light-transmitting region.

A light-shielding layer 160 is formed between the first polarizing plate 140 and the color filter substrate 110 or between the second polarizing plate 150 and the array substrate 120, and the light-shielding layer 160 surrounds the display region 112. Specifically, the light-shielding layer 160 has two types of arrangements:

in the first mode, as shown in fig. 2, the light shielding layer 160 is located between the first polarizing plate 140 and the color filter substrate 110, and in this case, when the display device manufactured by using the display panel 100 provided in this embodiment is used, the color filter substrate 110 side is disposed toward human eyes, that is, the color filter substrate 110 side is located on the outer side of the display device, and the array substrate 120 side is located on the inner side of the display device.

In a second mode, as shown in fig. 3, the light shielding layer 160 is located between the second polarizing plate 150 and the array substrate 120, and at this time, the display device manufactured by using the display panel 100 provided in this embodiment is disposed with the array substrate 120 side facing human eyes, that is, the array substrate 120 side is located at the outer side of the display device, and the color filter substrate 110 side is located at the inner side of the display device.

Specifically, the light shielding layer 160 may be a black Ink layer, and is formed by technologies such as black Ink (BM Ink) exposure, development, and screen printing, and other coatings that can achieve the light shielding effect may also be used, such as a black adhesive layer, a black composition layer, and Ink layers of other colors, and the like, and the light shielding layer is not limited herein, and specifically, the selection may be made according to actual evaluation and requirements. The light shielding layer 160 functions to prevent light leakage from the sealing region 113, so that the display panel 100 provided by the present embodiment has a good edge light shielding effect.

During preparation, the color film substrate 110 and the array substrate 120 are first assembled, and then the sealant 130 is cured by a UV light source. Specifically, during UV light irradiation, the display area 112 may be covered with the ultraviolet-proof cover 200, and then, as shown in fig. 4, UV light is irradiated from the color film substrate 110 side, and the light incident direction is as shown by an arrow in fig. 4, so that light can enter the area between the color film substrate 110 and the array substrate 120 through the light-transmitting area formed by the sealing area 113, and the sealant 130 located therebetween is cured. Then, a light-shielding layer 160 is prepared in the sealing area 113 on the side of the color film substrate 110 away from the array substrate 120, and then a first polarizing plate 140 is prepared on the side of the light-shielding layer 160 away from the color film substrate 110; alternatively, the light-shielding layer 160 is formed in the sealing region 113 on the side of the array substrate 120 away from the color filter substrate 110, and then the second polarizing plate 150 is formed on the side of the light-shielding layer 160 away from the array substrate 120. In the above operation process, except that the setting process of the light shielding layer 160 is different from the manufacturing process of the common display panel 100, the remaining manufacturing processes are the same as the manufacturing process of the common display panel 100, which is well known by those skilled in the art and will not be described herein.

In the above operation, the process of not disposing the black matrix 111 in the sealing region 113 is different from the process of fabricating the ordinary color filter substrate, and the remaining fabrication processes are the same as the process of fabricating the ordinary color filter substrate, which are well known to those skilled in the art and will not be described herein again. The preparation principle of preparing display panels of other models is the same as that of the VA-type TFT-LCD, and the description is omitted.

In the display panel 100 provided in this embodiment, the black matrix 111 is only fabricated in the display region 112 of the color film substrate 110, and the black matrix 111 is not fabricated in the sealing region 113, so that the entire region of the sealing region 113 of the color film substrate 110 can be used as a light-transmitting region, and thus UV light can enter a region between the color film substrate 110 and the array substrate 120 from the light-transmitting region on the side of the color film substrate 110, and further the sealant 130 between the color film substrate 110 and the array substrate 120 is cured without increasing the size of the sealing region 113. Meanwhile, the side of the color film substrate 110 irradiates UV light, so that the substrate after the color film substrate 110 and the array substrate 120 are combined can be prevented from being turned over up and down, the manufacturing tempo of the display panel 100 is improved, and the manufacturing cost is reduced; the mutual displacement of the substrates after the color film substrate 110 and the array substrate 120 are paired in the vertical turning process can be avoided, so that the phenomenon that the frame adhesive 130 punctures or the peripheral brightness is uneven can be avoided.

In addition, since the color filter substrate 110 in this embodiment does not have the black matrix 111 in the sealing region 113, when the display panel 100 is manufactured by using the color filter substrate 110 in this embodiment, the sealant 130 may directly contact the color filter substrate 110 or an ITO (Indium Tin oxide) layer on the color filter substrate 110, so that the adhesive force of the sealant 130 is increased, and the display panel 100 has higher reliability.

In summary, the display panel 100 provided in this embodiment is suitable for UV light to be irradiated from the color film substrate 110 side, and is beneficial to the design of a narrow-frame display panel, that is, the sealant curing requirement and the design requirement thereof are considered at the same time, so that the display panel 100 is suitable for various display panels including TN type, IPS type, VA type, FFS type, and the like, and can also be applied to frameless products, especially three-sided or four-sided frameless products.

In order to further improve the curing effect, in an optional embodiment, a space is provided between the sealant 130 and the black matrix 111, that is, when the black matrix 111 is prepared on the color film substrate 110, the boundary of the black matrix 111 is not overlapped with the sealant 130, so that, no matter a conventional display panel or a narrow-frame display panel is adopted, the curing of the sealant 130 by light incident from the side of the color film substrate 110 will not be affected, the curing effect is good, and the curing quality of the sealant 130 is improved.

Example two

In an alternative embodiment, referring to fig. 5, in order to prevent light from leaking from the gap between the black matrix 111 and the light-shielding layer 160, an orthogonal projection of the light-shielding layer 160 on the surface of the black matrix 111 has an overlapping region 170 with the black matrix 111. Therefore, the display panel provided by the embodiment can play a good edge shading effect no matter at various viewing angles. And the TFT device exists at the periphery of the display panel, so that the TFT device can be prevented from being sensitive to light due to good shading, and the stability of the TFT device can be improved.

Referring to fig. 6, in an alternative embodiment, the width a of the overlapping region 170 is 3-10 μm to prevent the inner edge of the light shielding layer 160 from adversely affecting the normal display of the display region 112 and to prevent light leakage from the edge of the light shielding layer 160.

In an alternative embodiment, the thickness h of the light-shielding layer 160 is 1-3 μm, which can be determined according to the OD (optical density) value, and the OD value is preferably greater than 3.5, so as to achieve better peripheral light-shielding effect.

In order to improve the reliability of the light-shielding layer 160 during the manufacturing process, in an alternative embodiment, the pencil hardness of the light-shielding layer 160 is greater than or equal to 2B.

In an alternative embodiment, the size of the first polarizing plate 140 is matched with the size of the color film substrate 110. The second polarizer 150 has a size corresponding to the array substrate 120. The term "matching" as used herein means that the sidewall of the first polarizing plate 140 is flush with the sidewall of the color filter substrate 110, and the sidewall of the second polarizing plate 150 is flush with the sidewall of the array substrate 120. Thus, the appearance of the display panel 100 can be made beautiful.

In an alternative embodiment, a metal line structure 121 is formed in the sealing region 113 on a side of the array substrate 120 opposite to the color filter substrate 110, and the sealant 130 is formed on the metal line structure 121. Thus, the stability of the connection relationship between the sealant 130 and the array substrate 120 is ensured.

EXAMPLE III

Referring to fig. 7, the present embodiment provides a display device, which includes a housing 300, a backlight module 400 disposed in the housing 300, and the display panel 100 provided in the foregoing embodiments, wherein the display panel 100 is located at a light emitting side of the backlight module 400, so that the backlight module 400 provides a light source for the display panel 100. The display panel 100 has the same structural features as the display panel 100 in the above embodiments, and the functions thereof are the same, which are not described herein again.

The foregoing is considered as illustrative only of the preferred embodiments of the invention, and is presented merely for purposes of illustration and description of the principles of the invention and is not intended to limit the scope of the invention in any way. Any modifications, equivalents and improvements made within the spirit and principles of the present application and other embodiments of the present application without the exercise of inventive faculty will occur to those skilled in the art and are intended to be included within the scope of the present application.

Claims

1. A display panel comprises a display area and a sealing area, wherein the display panel comprises a color film substrate, an array substrate, a first polarizing plate located on one side of the color film substrate, which is far away from the array substrate, a second polarizing plate located on one side of the array substrate, which is far away from the color film substrate, and frame glue connecting the color film substrate and the array substrate, the frame glue is located in the sealing area, a black matrix is formed in the display area of the color film substrate, and the display panel is characterized in that a light shielding layer is formed between the first polarizing plate and the color film substrate or between the second polarizing plate and the array substrate, and the light shielding layer is arranged around the display area.

2. The display panel of claim 1, wherein the sealant is spaced apart from the black matrix.

3. The display panel according to claim 1, wherein an orthogonal projection of the light-shielding layer on the surface of the black matrix has an overlapping region with the black matrix.

4. The display panel according to claim 3, wherein the width of the overlapping area is 3 to 10 μm.

5. The display panel according to any one of claims 1 to 4, wherein the light-shielding layer has a thickness of 1 to 3 μm.

6. The display panel according to any one of claims 1 to 4, wherein the light-shielding layer has a pencil hardness of 2B or more.

7. The display panel according to any one of claims 1 to 4, wherein the light-shielding layer is a black ink layer.

8. The display panel according to any one of claims 1 to 4, wherein the first polarizer has a size corresponding to that of the color film substrate, and the second polarizer has a size corresponding to that of the array substrate.

9. The display panel according to any one of claims 1 to 4, wherein a metal line structure is formed in the sealing region on a side of the array substrate opposite to the color filter substrate, and the sealant is formed on the metal line structure.

10. A display device, comprising a housing, a backlight module disposed in the housing, and the display panel of any one of claims 1 to 9, wherein the display panel is located at a light emitting side of the backlight module.