Display panel

Abstract

The invention relates to a display panel. The display panel comprises a blind hole area and a display area surrounding the blind hole area, and the display panel comprises a color film substrate and an array substrate which are oppositely arranged; the first supporting column is located between the color film substrate and the array substrate and fixedly bonded with at least one of the color film substrate and the array substrate, and the first supporting column is located in the blind hole area; in the blind hole area, the difference between the distance between the color film substrate and the array substrate and the height of the first supporting column is not larger than 1 micron. By improving the design of the first supporting columns in the blind hole area, the color film substrate and the array substrate are in complete contact, the supporting effect is provided, the blind hole area is prevented from sinking, and the image quality of the camera is improved.

Description

TECHNICAL FIELD

[0001] The present disclosure relates to the technical field of display, in particular to a display panel. BACKGROUND

[0002] With the development of display technology, the screen ratio of display devices can reach more than 90%, and is increasingly close to the design of full screen. For display devices that need full screen design, sensors such as cameras and receivers need to be installed in the display area of the panel device in the form of a hole (for example, a blind hole).

[0003] The liquid crystal display panel includes an array substrate, a color film substrate, and a liquid crystal layer between the array substrate and the color film substrate. In the blind hole area, the liquid crystal layer is also retained between the array substrate and the color film substrate. Under the action of stress, the display panel is prone to deformation, and in the blind hole area, the display panel may be concave due to the lack of support, affecting the imaging effect of the sensor such as the camera. SUMMARY

[0004] The present disclosure aims to at least solve one of the technical problems existing in the prior art, and proposes a display panel.

[0005] In order to achieve the above-mentioned purpose, the present disclosure provides a display panel, comprising a blind hole area and a display area surrounding the blind hole area, the display panel comprising:

[0006] The color film substrate and the array substrate are oppositely arranged;

[0007] The first support column is located between the color film substrate and the array substrate, and is fixedly bonded with at least one of the color film substrate and the array substrate, and the first support column is located in the blind hole area.

[0008] In the blind hole area, the difference between the distance between the color film substrate and the array substrate and the height of the first support column is not greater than 1 μm.

[0009] In some embodiments, the color film substrate comprises a first substrate and a protective layer located on the side of the first substrate facing the array substrate, and the protective layer covers the blind hole area.

[0010] The first support column is fixedly bonded with the protective layer, and the cross-sectional area of the first support column parallel to the array substrate gradually decreases in the direction of the color film substrate pointing to the array substrate.

[0011] In some embodiments, the display panel further comprises an isolation area located between the blind hole area and the display area, and the isolation area surrounds the blind hole area, and the display area surrounds the isolation area.

[0012] The display panel further comprises a second support column located in the isolation region, the second support column is located between the array substrate and the protective layer, and is fixedly bonded with the protective layer, and along the direction of the array substrate pointing to the color film substrate, the second support column gradually decreases in area parallel to the cross section of the array substrate.

[0013] The second support column is made of the same material as the first support column.

[0014] In some embodiments, the array substrate comprises a second substrate and an insulating layer located on the side of the second substrate facing the color film substrate, and the insulating layer is located in the blind hole region.

[0015] The first support column is fixedly bonded with the insulating layer, and along the direction of the array substrate pointing to the color film substrate, the first support column gradually decreases in area parallel to the cross section of the array substrate.

[0016] In some embodiments, the first support column comprises a first sub-support column and a second sub-support column arranged in sequence along the direction of the color film substrate pointing to the array substrate.

[0017] The first sub-support column is fixedly bonded with the color film substrate, and along the direction of the color film substrate pointing to the array substrate, the first sub-support column gradually decreases in area parallel to the cross section of the array substrate.

[0018] The second sub-support column is fixedly bonded with the first sub-support column, and along the direction of the color film substrate pointing to the array substrate, the second sub-support column gradually decreases in area parallel to the cross section of the array substrate, or the second sub-support column is fixedly bonded with the array substrate, and along the direction of the array substrate pointing to the color film substrate, the second sub-support column gradually decreases in area parallel to the cross section of the array substrate.

[0019] In some embodiments, the color film substrate comprises a first substrate and a protective layer located on the side of the first substrate facing the array substrate, the protective layer covers the blind hole region and the display region, and the first sub-support column is fixedly bonded with the protective layer.

[0020] In some embodiments, the color film substrate comprises a first substrate and a protective layer located on the side of the first substrate facing the array substrate, the protective layer is provided with a receiving hole located in the blind hole region, the receiving hole exposes the first substrate, and part of the first sub-support column is located in the receiving hole and is fixedly bonded with the first substrate.

[0021] In some embodiments, the display panel further comprises an isolation region between the blind hole region and the display region, and the isolation region surrounds the blind hole region, and the display region surrounds the isolation region.

[0022] The display panel further comprises a second support column in the isolation region, the second support column is between the array substrate and the protective layer, and is fixedly bonded with the protective layer, and gradually decreases in area of the cross section of the array substrate in a direction from the color film substrate to the array substrate.

[0023] The second sub-support column is fixedly bonded with the first sub-support column, and the material of the second sub-support column is the same as that of the second support column.

[0024] In some embodiments, the array substrate comprises a second substrate and an insulating layer on a side of the second substrate facing the color film substrate, the insulating layer is in the blind hole region, and the second sub-support column is in contact with the insulating layer.

[0025] In some embodiments, the second sub-support column is fixedly bonded with the insulating layer. BRIEF DESCRIPTION OF DRAWINGS

[0026] The accompanying drawings are included to provide a further understanding of the present disclosure and constitute a part of the specification, and are used together with the following detailed description to explain the present disclosure, but do not constitute a limitation of the present disclosure. In the drawings:

[0027] Figure 1 is a schematic diagram of a planar structure of a display panel in some embodiments of the present disclosure;

[0028] Figure 2 is a schematic diagram of a cross-sectional structure of a display panel in some embodiments of the present disclosure;

[0029] Figure 3 is a schematic diagram of a cross-sectional structure of a display panel in some embodiments of the present disclosure;

[0030] Figure 4 is a schematic diagram of a cross-sectional structure of a display panel in some embodiments of the present disclosure;

[0031] Figure 5 is a schematic diagram of a cross-sectional structure of a display panel in some embodiments of the present disclosure;

[0032] Figure 6 is a schematic diagram of a cross-sectional structure of a display panel in some embodiments of the present disclosure;

[0033] Figure 7 is a schematic diagram of a cross-sectional structure of a display panel in some embodiments of the present disclosure. DETAILED DESCRIPTION

[0034] The specific embodiments of the present disclosure will be described in detail below with reference to the drawings. It should be understood that the specific embodiments described herein are merely illustrative and explanatory, and are not intended to limit the present disclosure.

[0035] To make the objects, technical solutions and advantages of the embodiments of the present disclosure clearer, the technical solutions of the embodiments of the present disclosure will be described clearly and completely below with reference to the drawings of the embodiments of the present disclosure. Obviously, the described embodiments are only a part of the embodiments of the present disclosure, rather than all the embodiments of the present disclosure. Based on the described embodiments of the present disclosure, all other embodiments obtained by a person of ordinary skill in the art without creative effort belong to the scope of protection of the present disclosure.

[0036] Unless otherwise defined, technical terms or scientific terms used in the embodiments of the present disclosure should be understood as having the same meaning as commonly understood by a person of ordinary skill in the art to which the present disclosure belongs. 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 terms “include”, “contain”, and similar terms mean that the elements or objects before the terms encompass the elements or objects listed after the terms and their equivalents, and do not exclude other elements or objects. The terms “connect” or “connected” or similar terms do not mean physical or mechanical connection, but can include electrical connection, whether direct or indirect. The terms “up”, “down”, “left”, “right”, and the like only represent relative positional relationships, which can change accordingly when the absolute positions of the described objects change.

[0037] As used herein, “parallel”, “perpendicular” includes the stated case and the approximately similar case to the stated case, the range of which is within an acceptable deviation range, wherein the acceptable deviation range is determined by a person of ordinary skill in the art considering the measurement being discussed and the error related to the measurement of a specific quantity (i.e., the limitation of the measurement system). For example, “parallel” includes absolute parallel and approximately parallel, wherein the acceptable deviation range of approximately parallel can be, for example, a deviation within 5°; “perpendicular” includes absolute perpendicular and approximately perpendicular, wherein the acceptable deviation range of approximately perpendicular can also be, for example, a deviation within 5°.

[0038] It should be understood that when a layer or element is referred to as being on another layer or substrate, it can be directly on the other layer or substrate, or there can be an intermediate layer between the layer or element and the other layer or substrate.

[0039] Exemplary embodiments are described herein with reference to cross-sectional and / or plan view illustrations that are schematic illustrations of idealized embodiments. Variations from the shapes of the illustrations as a result, for example, of manufacturing techniques and / or tolerances, are to be expected. Thus, exemplary embodiments should not be construed as limited to the particular shapes of the regions illustrated herein but are to include deviations in shapes that result, for example, from manufacturing. The regions illustrated in the figures are schematic and their shapes are not intended to illustrate the actual shape of a region of a device and are not intended to limit exemplary embodiments to the particular shapes of the regions illustrated therein.

[0040] As people pay more and more attention to the appearance of display products, the appearance of display products is developing in the direction of being lighter, thinner, and having a higher screen-to-body ratio. Among them, a high screen-to-body ratio can greatly improve the user experience. In the related art, a blind hole screen technology can be used to achieve a full-screen design.

[0041] In the blind hole screen technology, a blind hole area HA is formed in the middle of a display area AA of a liquid crystal display panel. The blind hole area HA can serve as a light transmission channel, and then a mounting hole for placing a sensor, such as a camera, is formed on a back light module. The mounting hole and the blind hole area HA are arranged opposite to each other so that light can pass through the blind hole area HA and enter the camera. This design can reduce screen obstruction and improve the screen-to-body ratio advantage.

[0042] The structure of the blind hole area HA can affect the imaging effect of the camera.

[0043] For example, the “PV (Peak to Valley) value” parameter of the blind hole screen directly affects the imaging resolution of the front camera. The PV value is an index that reflects the flatness of the glass surface. The industry standard requires that the PV value at the blind hole position be <0.8λ, and λ is 632.8 nm. The smaller the PV value, the better the imaging effect of the front camera, and the larger the PV value, the worse the imaging effect.

[0044] The size of the PV value is related to whether there is a support design at the position of the blind hole area HA and whether the support is sufficient.

[0045] In some display panels, the blind hole area HA is not provided with a support design, that is, the blind hole area HA only has a liquid crystal layer 30 and no other support. During the thinning and polishing process of the display panel, the blind hole area HA is prone to concave due to the influence of atmospheric pressure. The greater the degree of concave, the greater the PV value due to light interference, and the worse the imaging effect of the camera.

[0046] Furthermore, the PV value varies significantly under different polishing conditions. In the manufacturing of blind-hole screens, different levels of polishing processes can be applied to the blind-hole area HA: "0 polishing," "single polishing," and "double polishing." "0 polishing" means no polishing is performed. "Single polishing" means only one polishing treatment. "Double polishing" means two polishing treatments. Among these, the PV value is best under double polishing conditions, and worst under 0 polishing conditions.

[0047] In some display panels, a support design can be implemented in the blind hole area HA, that is, a support column 40 can be made in the blind hole area HA.

[0048] Figure 1 These are schematic diagrams of the planar structure of the display panel in some embodiments. Figure 2 These are schematic cross-sectional views of the display panel in some embodiments. Specifically, Figure 2 It is along Figure 1 A schematic diagram of the cross-sectional structure obtained by cutting with the XX cutting line.

[0049] like Figure 1 As shown, the display panel includes a blind hole area HA, an isolation area SA surrounding the blind hole area HA, and a display area AA surrounding the isolation area SA.

[0050] like Figure 2 As shown, the display panel includes a color filter substrate 20, an array substrate 10, and a liquid crystal layer 30 located between the color filter substrate 20 and the array substrate 10, which are disposed opposite to each other.

[0051] The color filter substrate 20 includes a first substrate 21 and a light-shielding layer 23, a color filter layer 26, a protective layer 22 and a first alignment layer 27 located on the side of the first substrate 21 facing the array substrate 10.

[0052] A portion of the light-shielding layer 23 is located in the display area AA, and another portion is located in the isolation area SA. The light-shielding layer 23 also has a light-transmitting opening located in the display area AA.

[0053] The color filter layer 26 may include multiple light-filtering sections, at least a portion of which are located within light-transmitting openings. These multiple light-filtering sections can transmit red, green, and blue light, thereby enabling the display panel to achieve color display.

[0054] The protective layer 22 covers the light filter layer and the light shielding layer 23.

[0055] The display panel also includes a first support post 45 located in the blind hole area HA, a plurality of second support posts located in the isolation area SA, and a plurality of third support posts 41 located in the display area AA. The first support post 45, the second support post, and the third support post 41 can be fixedly bonded to the protective layer 22 at their respective locations.

[0056] The second support columns include a plurality of second main support columns 44 and a plurality of second auxiliary support columns 40. Optionally, the second auxiliary support columns 40 can be divided into a first type of support column 43 and a second type of support column 42. The first type of support column 43 is an annular column, and surrounds the display area AA. The second type of support column 42 is a cylindrical column, a prismatic column, etc. The plurality of second type of support columns 42 surround the display area AA, and are arranged at intervals.

[0057] In the isolation area SA, the distance between the color filter substrate 20 and the array substrate 10 is equal to or close to the height of the second main support column 44, and the distance between the color filter substrate 20 and the array substrate 10 is greater than the second auxiliary support column.

[0058] The color filter substrate 20 further includes a plurality of raised portions between the protective layer 22 and the light shielding layer 23. The raised portions are between the protective layer 22 and the light shielding layer 23. The plurality of raised portions include a plurality of first raised portions 24 and a plurality of second raised portions 25. The first raised portions 24 are between the first type of support column 43 and the light shielding layer 23. The second raised portions 25 are between the second type of support column 42 and the light shielding layer 23.

[0059] The array substrate 10 includes a second substrate 11, an insulating layer 14, a driving circuit layer 12, and a second orientation layer 13 on one side of the second substrate 11. The insulating layer 14 is in the blind hole area HA, and a part of the driving circuit layer 12 is in the display area AA, and the other part of the driving circuit is in the isolation area SA. The driving circuit layer 12 includes a driving circuit in the display area AA, which is used to provide a driving signal for controlling the deflection of the liquid crystal layer 30.

[0060] Figure 1 The first support column 45 is in the blind hole area HA. When a whole first support column 45 is designed in the blind hole area HA, the PV value is improved obviously: under double polishing conditions, the PV value is less than 0.8λ, which meets the specification requirements. However, under single polishing conditions, the PV value meets less than <1.0λ by 90%. Under 0 polishing conditions, the PV value meets >1.0λ by more than 90%. Obviously, under single polishing conditions and 0 polishing conditions, there are a large number of products that do not meet the specification requirements. Therefore, when using low-cost single polishing and 0 polishing processes, the blind hole screen obviously cannot meet the mass production demand.

[0061] In one specific embodiment, as shown in Figure 1 In the isolation area SA, the second main support column 44 can play a supporting role. The second auxiliary support column does not play a supporting role when it is not under pressure, and the second main support column 44 and the second auxiliary support column are arranged in the form of a certain height difference.

[0062] Optionally, the first support column 45 can be equal in height to the second main support column 44. For example, a HTM (Half Tone Mask) process can be used to manufacture the whole first support column 45 in the blind hole area HA to be equal in height to the second main support column 44.

[0063] In this case, under the double-throw condition, the PV value is improved to a certain extent, but the PV values under the single-throw and 0-throw process conditions still cannot meet the requirements of mass production. According to the SEM (Scanning Electron Microscope) cross-section measurement: in the display area AA, the thickness of the light shielding layer 23 is 1.2 μm, the thickness of the color film layer 26 is 1.85 μm, and the thickness of the protective layer 22 is 1.1 μm. In the isolation area SA, the height of the second main support column 44 is 2.25 μm. In the blind hole area HA, the total thickness of the protective layer 22 and the first support column 45 is 4.4 μm. The whole first support column 45 in the blind hole area HA does not directly contact the array substrate 10, and there is a spacing of about 1.2 μm + 1.85 μm + 1.1 μm + 2.25 μm - 4.4 μm = 2 μm or so, which inevitably affects the support effect of the whole first support column 45 in the blind hole area HA, resulting in that the first support column 45 cannot maximize the effective support effect. This problem will be magnified under the single-throw and 0-throw process conditions, resulting in a more serious situation that the PV value level is not ideal.

[0064] To at least alleviate or solve one of the above-mentioned technical problems, the present disclosure provides a display panel.

[0065] Figure 3 is a schematic diagram of a cross-sectional structure of a display panel in some embodiments of the present disclosure.

[0066] In some embodiments, as shown in Figure 3 The display panel provided by the present disclosure includes a blind hole area HA and a display area AA surrounding the blind hole area HA. The display panel includes a color film substrate 20, an array substrate 10, and a first support column 45.

[0067] The color film substrate 20 and the array substrate 10 are arranged opposite to each other.

[0068] The first support post 45 is located between the color filter substrate 20 and the array substrate 10, and is situated in the blind via region HA. The first support post 45 is fixedly bonded to at least one of the color filter substrate 20 and the array substrate 10. For example, in one embodiment, the first support post 45 may be fixedly bonded to the color filter substrate 20. In another embodiment, the first support post 45 may be fixedly bonded to the array substrate 10. The fixed bonding of the first support post 45 to either the color filter substrate 20 or the array substrate 10 facilitates reliable inter-cell alignment between the color filter substrate 20 and the array substrate 10, as well as reliable support after alignment, preventing slippage.

[0069] In the blind aperture region HA, the difference between the distance between the color filter substrate 20 and the array substrate 10 and the height of the first support pillar 45 is no greater than 1 μm.

[0070] Optionally, the distance between the color filter substrate 20 and the array substrate 10 is less than 1 μm from the height of the first support column 45.

[0071] Optionally, the distance between the color filter substrate 20 and the array substrate 10 is less than 0.5 μm from the height of the first support post 45.

[0072] Optionally, the distance between the color filter substrate 20 and the array substrate 10 is equal to the height of the first support post 45. In this case, the first support post 45 is in contact with both the color filter substrate 20 and the array substrate 10.

[0073] In this embodiment, the height of the first support column 45 is increased, which allows the bottom of the first support column 45 to contact the array substrate 10 and the top to contact the color filter substrate 20, filling the gap between the color filter substrate 20 and the array substrate 10 in the blind hole region HA. This maximizes the support for the color filter substrate 20 and the array substrate 10 in the blind hole region HA, preventing the blind hole region HA from sinking, thereby improving the PV value and enhancing the image quality of the camera.

[0074] In some embodiments, such as Figure 3 As shown, the first support post 45 is fixedly bonded to the color filter substrate 20. Specifically, the color filter substrate 20 includes a first substrate 21 and a protective layer 22 located on the side of the first substrate 21 facing the array substrate 10, the protective layer 22 covering the blind hole region HA.

[0075] The first support post 45 is fixedly bonded to the protective layer 22. Along the direction from the color filter substrate 20 to the array substrate 10, the area of ​​the first support post 45 parallel to the cross-section of the array substrate 10 gradually decreases. It is understood that the cross-section of the first support post 45 parallel to the array substrate 10 is perpendicular to the thickness direction of the display panel.

[0076] In the embodiments of the present disclosure, the first support column 45 is fixedly bonded with the protective layer 22 in the color film substrate 20, that is, the optical adhesive can be used to prepare on the protective layer 22 of the color film substrate 20. For example, the transparent organic resin can be coated on the blind hole area HA on the side of the protective layer 22 facing the array substrate 10, and the first support column 45 can be obtained after the transparent organic resin is cured. At this time, the first support column 45 is fixedly bonded with the protective layer 22.

[0077] Optionally, the material of the protective layer 22 can also include the transparent organic resin.

[0078] Optionally, the material of the protective layer 22 is the same as the material of the first support column 45.

[0079] In the embodiments of the present disclosure, the same or similar transparent organic resin is used to form the protective layer 22 and the first support column 45 of the color film substrate 20, which is beneficial to improve the fixed bonding effect between the first support column 45 and the protective layer 22.

[0080] In some embodiments, as shown in FIG. 1, the display panel further includes an isolation area SA located between the blind hole area HA and the display area AA, and the isolation area SA surrounds the blind hole area HA, and the display area AA surrounds the isolation area SA. Figure 3

[0081] The display panel further includes a second support column located in the isolation area SA, the second support column is located between the array substrate 10 and the protective layer 22, and the second support column is fixedly bonded with the protective layer 22. In the direction of the color film substrate 20 pointing to the array substrate 10, the second support column gradually decreases in parallel to the cross-sectional area of the array substrate 10.

[0082] In the embodiments of the present disclosure, the second support column is made of the same material as the first support column 45. In this case, the first support column 45 and the second support column can be formed by the same material in the same process. For example, the same transparent organic resin film layer can be subjected to exposure, development and other patterning processes in sequence to obtain the first support column 45 and the second support column, respectively.

[0083] In the embodiments of the present disclosure, the second support column is made of the same material as the first support column 45. In this case, the first support column 45 and the second support column can be formed by the same material in the same process. For example, the same transparent organic resin film layer can be subjected to exposure, development and other patterning processes in sequence to obtain the first support column 45 and the second support column, respectively.

[0084] Optionally, the plurality of second support columns include a plurality of second main support columns 44 and a plurality of second auxiliary support columns, the height of the second main support column 44 is greater than the height of the second auxiliary support column, and the height of the first support column 45 is greater than the height of the second support column.

[0085] ​In combination with the foregoing, in the case where the first support column 45 and the second support column are of the same height, there is a large gap between the first support column 45 and the array substrate 10, and therefore, in the present embodiment, the height of the first support column 45 is greater than the height of the second support column. In this case, in the process of exposure, the mask used has different light transmission degrees at positions corresponding to the first support column 45 and the second support column, respectively. Since the first support column 45 is higher, i.e., more transparent organic resin remains after development, it is less exposed to light during exposure, and correspondingly, the light transmission degree at the corresponding position of the mask is smaller.

[0086] In combination with the foregoing, in the case where the first support column 45 and the second support column are of the same height, there is a large gap between the first support column 45 and the array substrate 10, and therefore, in the present embodiment, the height of the first support column 45 is greater than the height of the second support column. In this case, in the process of exposure, the mask used has different light transmission degrees at positions corresponding to the first support column 45 and the second support column, respectively. Since the first support column 45 is higher, i.e., more transparent organic resin remains after development, it is less exposed to light during exposure, and correspondingly, the light transmission degree at the corresponding position of the mask is smaller. Figure 1 In combination with the foregoing, in the case where the first support column 45 and the second support column are of the same height, there is a large gap between the first support column 45 and the array substrate 10, and therefore, in the present embodiment, the height of the first support column 45 is greater than the height of the second support column. In this case, in the process of exposure, the mask used has different light transmission degrees at positions corresponding to the first support column 45 and the second support column, respectively. Since the first support column 45 is higher, i.e., more transparent organic resin remains after development, it is less exposed to light during exposure, and correspondingly, the light transmission degree at the corresponding position of the mask is smaller.

[0087] In the present embodiment, the first support column 45, the second main support column 44, and the second auxiliary support column use MTM (Muti-Tone Mask) in the patterning process. The light transmission degrees of the first support column 45, the second main support column 44, and the second auxiliary support column at positions corresponding to the mask are all different, and the light transmission degree of the second main support column 44 is intermediate between the light transmission degrees of the first support column 45 and the second auxiliary support column, i.e., the light transmission degree of the second auxiliary support column is greater than the light transmission degree of the second main support column 44, and the light transmission degree of the second main support column 44 is greater than the light transmission degree of the first support column 45.

[0088] In the present embodiment, the first support column 45, the second main support column 44, and the second auxiliary support column can be formed by one-time coating, exposure, and development, and the height of the second auxiliary support column is less than the height of the second main support column 44, and the height of the second main support column 44 is less than the height of the first support column 45.

[0089] In the present embodiment, by selecting an MTM with a suitable light transmission degree, the height difference between the second main support column 44 and the second auxiliary support column can be ensured, and at the same time, the height of the entire first support column 45 in the blind hole region HA is increased, the top of the first support column 45 contacts the array substrate 10, and the gap between the color film substrate 20 and the array substrate 10 in the blind hole region HA is filled, thereby optimizing the PV value.

[0090] Figure 4 is a cross-sectional structure schematic diagram of a display panel in another embodiment of the present disclosure. Figure 5 is a cross-sectional structure schematic diagram of a display panel in another embodiment of the present disclosure. Figure 6 is a cross-sectional structure schematic diagram of a display panel in another embodiment of the present disclosure.

[0091] In some embodiments, as shown in Figure 4 , Figure 5 and Figure 6 , the first support column 45 includes a first sub-support column 452 and a second sub-support column 451 arranged in sequence in the direction from the color filter substrate 20 to the array substrate 10.

[0092] The first sub-support column 452 is fixedly bonded to the color filter substrate 20, and in the direction from the color filter substrate 20 to the array substrate 10, the first sub-support column 452 gradually decreases in area parallel to the cross section of the array substrate 10.

[0093] As shown in Figure 4 and Figure 5 , the second sub-support column 451 is fixedly bonded to the first sub-support column 452, and in the direction from the color filter substrate 20 to the array substrate 10, the second sub-support column 451 gradually decreases in area parallel to the cross section of the array substrate 10.

[0094] Figure 4 and Figure 5 The embodiment shown is equivalent to a film layer heightening design in the blind hole area HA.

[0095] For example, as shown in Figure 4 , the overcoat (OC) film layer in the color filter substrate 20 is a transparent organic resin film layer. Optionally, the overcoat 22 can be uniformly coated with a non-photocurable resin material, without the need for patterning treatment such as an exposure process. The surface of the overcoat 22 away from the first substrate 21 is a flat surface, and therefore the overcoat 22 can also serve as a flat layer, so that the first support column 45 and the second support column are both positioned on the overcoat 22 film layer.

[0096] In order to increase the support of the blind hole area HA and prevent the blind hole area HA from being concave, a photocurable optical adhesive material can be used to form the first sub-support column 452, achieving the effect of heightening. Then, using a photocurable material and HTM, after coating, exposure, and development, the second sub-support column 451 and the second support column are obtained, and finally the total thickness of the first support column 45 coated in the blind hole area HA is increased by about 2 μm compared to the second support column in the non-blind hole area HA.

[0097] Alternatively, as shown in Figure 6 , the second sub-support column 451 is fixedly bonded to the array substrate 10, and in the direction from the array substrate 10 to the color filter substrate 20, the second sub-support column 451 gradually decreases in area parallel to the cross section of the array substrate 10.

[0098] In this embodiment, the first support post 45 can be divided into two parts: a first sub-support post 452 and a second sub-support post 451. The first sub-support post 452 can be fixedly bonded to the color filter substrate 20, for example, it can be fixedly bonded to the protective layer 22 of the color filter substrate 20. That is, the first sub-support post 452 is formed in the blind hole region HA of the color filter substrate 20.

[0099] The second sub-support post 451 can be fixedly bonded to the first sub-support post 452, that is, the second sub-support post 451 can be formed on the side of the first sub-support post 452 facing the array substrate 10.

[0100] The second sub-support post 451 can also be fixedly bonded to the array substrate 10, for example, it can be fixedly bonded to the insulating layer 14 of the array substrate 10. That is, the second sub-support post 451 can be formed on the side of the insulating layer 14 away from the second substrate 11.

[0101] In some embodiments, such as Figure 4 As shown, the color filter substrate 20 includes a first substrate 21 and a protective layer 22 located on the side of the first substrate 21 facing the array substrate 10. The protective layer 22 covers the blind hole region HA and the display region AA. The first sub-support post 452 is fixedly bonded to the protective layer 22.

[0102] In this embodiment of the present disclosure, the protective layer 22 may be a continuous, uniform organic transparent film layer covering the blind hole region HA and the display region AA, and the first support pillar 45 may be formed on the side of the protective layer 22 away from the first substrate 21.

[0103] In some embodiments, such as Figure 5 As shown, the color filter substrate 20 includes a first substrate 21 and a protective layer 22 located on the side of the first substrate 21 facing the array substrate 10. The protective layer 22 has a receiving hole located in the blind hole region HA, the receiving hole exposes the first substrate 21, and a portion of the first sub-support post 452 is located in the receiving hole and is fixedly bonded to the first substrate 21.

[0104] In this embodiment of the disclosure, the protective layer 22 may not cover the blind hole region HA, but only the continuous uniform film layer of the display region AA. In this case, the first sub-support pillar 452 can be directly formed on the first substrate 21 of the blind hole region HA.

[0105] In some embodiments, such as Figure 4 and Figure 5 As shown, the display panel also includes an isolation area SA located between the blind aperture area HA and the display area AA, with the isolation area SA surrounding the blind aperture area HA and the display area AA surrounding the isolation area SA.

[0106] The display panel further comprises a second support column located in the isolation area SA, the second support column is located between the array substrate 10 and the protective layer 22, and is fixedly bonded with the protective layer 22, and the area of the second support column parallel to the cross section of the array substrate 10 gradually decreases in the direction of the array substrate 10 pointing to the color film substrate 20.

[0107] The second sub-support column 451 is fixedly bonded with the first sub-support column 452, and the area of the second sub-support column 451 parallel to the cross section of the array substrate 10 gradually decreases in the direction of the array substrate 10 pointing to the color film substrate 20, and the material of the second sub-support column 451 and the second support column is the same.

[0108] In the embodiments of the present disclosure, the material of the second sub-support column 451 and the second support column is the same, so the second sub-support column 451 and the second support column can be formed synchronously in the same preparation process.

[0109] Optionally, in some embodiments, the height of the second sub-support column 451 and the second support column is the same. As mentioned above, Figure 1 the height of the first support column 45 and the second support column in the display panel shown in Figure 1 In the embodiments of the present disclosure, the first support column 45 in Figure 1 the display panel shown in FIG. 1 can be used as the second sub-support column 451 of the present application, and then the first sub-support column 452 is formed in the protective layer 22 or the accommodation hole before the second sub-support column 451. In this case, the preparation process of the display panel shown in

[0110] In some embodiments, as shown in Figure 4 , Figure 5 and Figure 6 , the array substrate 10 comprises a second substrate 11 and an insulating layer 14 located on the side of the second substrate 11 facing the color film substrate 20, the insulating layer 14 is located in the blind hole area HA, and the second sub-support column 451 is in contact with the insulating layer 14.

[0111] In the embodiments of the present disclosure, the second sub-support column 451 in contact with the insulating layer 14 can ensure the supporting effect of the first support column 45 on the array substrate 10 and the color film substrate 20, avoid leaving a gap to affect the PV value, and further affect the picture quality of the camera.

[0112] In some embodiments, as shown in Figure 6 , the second sub-support column 451 is fixedly bonded with the insulating layer 14.

[0113] In the embodiments of the present disclosure, the first sub-supporting column 452 can be formed on the side of the protective layer 22 away from the first substrate 21, and the first sub-supporting column 452 is fixedly bonded with the protective layer 22. Then the second sub-supporting column 451 is formed on the side of the insulating layer 14 away from the second substrate 11. The second sub-supporting column 451 is fixedly bonded with the insulating layer 14.

[0114] For example, as known from the foregoing, Figure 1 The height of the first supporting column 45 in the array substrate 10 is the same as that of the second supporting column, and in the embodiments of the present disclosure, the first supporting column 45 in the array substrate 10 can be taken as the first sub-supporting column 452, and then the second sub-supporting column 451 is formed on the insulating layer 14 of the array substrate 10. The first sub-supporting column 452 and the second sub-supporting column 451 are in contact with each other. Figure 1

[0115] The embodiments of the present disclosure are equivalent to a heightening design on the side of the array substrate 10 in the blind hole area HA.

[0116] In the embodiments of the present disclosure, the first sub-supporting column 452 and the second sub-supporting column 451 are respectively made on the blind hole area HA of the color film substrate 20 and the array substrate 10, and then after the color film substrate 20 and the array substrate 10 are aligned, the first sub-supporting column 452 on the side of the color film substrate 20 and the second sub-supporting column 451 on the side of the array substrate 10 are in contact with each other, forming the first supporting column 45 to completely support the blind hole area HA.

[0117] Alternatively, the second sub-supporting column 451 can also be selected from a light-curable organic resin material, and after the driving circuit layer 12 of the array substrate 10 is completed, the second sub-supporting column 451 can be made by performing the processes of light adhesive coating, exposure, development and curing on the side of the insulating layer 14 away from the second substrate 11.

[0118] In the embodiments of the present disclosure, the design of adding the second sub-supporting column 40 on the side of the array substrate 10 can also achieve sufficient support in the blind hole area HA, preventing the blind hole area from being recessed.

[0119] Figure 7 is a schematic diagram of the cross-sectional structure of a display panel in some other embodiments of the present disclosure.

[0120] In some embodiments, as shown in Figure 7 The first supporting column 45 is fixedly bonded with the array substrate 10. Specifically, the array substrate 10 includes the second substrate 11 and the insulating layer 14 on the side of the second substrate 11 facing the color film substrate 20, and the insulating layer 14 is located in the blind hole area HA. The first supporting column 45 is fixedly bonded with the insulating layer 14.

[0121] In the direction of the array substrate 10 pointing to the color film substrate 20, the cross-sectional area of the first supporting column 45 parallel to the array substrate 10 gradually decreases.​

[0122] In the embodiments of the present disclosure, the first support column 45 is fixedly bonded with the insulating layer 14 in the array substrate 10, that is, the optical adhesive can be used to be prepared on the insulating layer 14 in the array substrate 10. For example, the transparent organic resin can be coated on the blind hole area HA on the side of the insulating layer 14 facing the array substrate 10, and the first support column 45 can be obtained after the transparent organic resin is cured. At this time, the first support column 45 is fixedly bonded with the insulating layer 14.

[0123] Optionally, the material of the insulating layer 14 can also include the transparent organic resin.

[0124] Optionally, the material of the insulating layer 14 is the same as the material of the first support column 45.

[0125] In the embodiments of the present disclosure, the same or similar transparent organic resin is used to form the insulating layer 14 and the first support column 45 in the array substrate 10, which is conducive to improving the fixed bonding effect between the first support column 45 and the insulating layer 14.

[0126] In summary, in the embodiments of the present disclosure, the entire first support column 45 of the blind hole area HA can maximize support the array substrate 10 and the color film substrate 20, which can prevent the blind hole area HA from being concave. That is, the present disclosure can improve the PV value by improving the design of the first support column 45 of the blind hole area HA, thereby improving the imaging quality of the camera. Especially, the PV value under the single polishing or 0 polishing process is improved to ensure that the specification requirements are met, so that the product has a competitive advantage in the low-cost scheme, which is conducive to improving the product yield and realizing mass production.

[0127] It can be understood that the above embodiments are only exemplary embodiments adopted for illustrating the principles of the present disclosure, but the present disclosure is not limited thereto. Various modifications and improvements can be made by those skilled in the art without departing from the spirit and essence of the present disclosure, and these modifications and improvements are also regarded as the protection scope of the present disclosure.

Claims

1. A display panel, characterized by, The display panel comprises a display area surrounding a blind hole area, and the display panel comprises: Oppositely arranged color film substrate and array substrate; The first support column is located between the color film substrate and the array substrate, and is fixedly bonded with at least one of the color film substrate and the array substrate, and the first support column is located in the blind hole area. The difference between the distance between the color film substrate and the array substrate and the height of the first support column in the blind hole area is not greater than 1 μm.

2. The display panel of claim 1, wherein, The color film substrate comprises a first substrate and a protective layer located on the side of the first substrate facing the array substrate, and the protective layer covers the blind hole area. The first support column is fixedly bonded with the protective layer, and the cross-sectional area of the first support column parallel to the array substrate gradually decreases in the direction of the color film substrate pointing to the array substrate.

3. The display panel of claim 2, wherein, The display panel further comprises an isolation area located between the blind hole area and the display area, and the isolation area surrounds the blind hole area, and the display area surrounds the isolation area. The display panel further comprises a second support column located in the isolation area, the second support column is located between the array substrate and the protective layer, and is fixedly bonded with the protective layer, and the cross-sectional area of the second support column parallel to the array substrate gradually decreases in the direction of the color film substrate pointing to the array substrate. The second support column is made of the same material as the first support column.

4. The display panel of claim 1, wherein, The array substrate comprises a second substrate and an insulating layer located on the side of the second substrate facing the color film substrate, and the insulating layer is located in the blind hole area. The first support column is fixedly bonded with the insulating layer, and the cross-sectional area of the first support column parallel to the array substrate gradually decreases in the direction of the array substrate pointing to the color film substrate.

5. The display panel of claim 1, wherein, The first support column comprises a first sub-support column and a second sub-support column arranged in sequence in the direction of the color film substrate pointing to the array substrate. The first sub-support column is fixedly bonded with the color film substrate, and the cross-sectional area of the first sub-support column parallel to the array substrate gradually decreases in the direction of the color film substrate pointing to the array substrate. The second sub-support column is fixedly bonded with the first sub-support column, and the cross-sectional area of the second sub-support column parallel to the array substrate gradually decreases in the direction of the color film substrate pointing to the array substrate, or the second sub-support column is fixedly bonded with the array substrate, and the cross-sectional area of the second sub-support column parallel to the array substrate gradually decreases in the direction of the array substrate pointing to the color film substrate.

6. The display panel of claim 5, wherein, The color film substrate comprises a first substrate and a protective layer located on the side of the first substrate facing the array substrate, and the protective layer covers the blind hole area and the display area, and the first sub-support column is fixedly bonded with the protective layer.

7. The display panel of claim 5, wherein, The color filter substrate comprises a first substrate and a protective layer located on a side of the first substrate facing the array substrate, the protective layer is provided with a receiving hole located in the blind hole region, the receiving hole exposes the first substrate, and a part of the first sub-supporting column is located in the receiving hole and fixedly bonded with the first substrate.

8. The display panel of claim 6, wherein, The display panel further comprises an isolation region located between the blind hole region and the display region, and the isolation region surrounds the blind hole region, and the display region surrounds the isolation region. The display panel further comprises a second supporting column located in the isolation region, the second supporting column is located between the array substrate and the protective layer and fixedly bonded with the protective layer, and the area of the cross section of the second supporting column parallel to the array substrate gradually decreases in a direction of the color filter substrate pointing to the array substrate. The second sub-supporting column is fixedly bonded with the first sub-supporting column, and the material of the second sub-supporting column is the same as that of the second supporting column.

9. The display panel of any one of claims 5-8, wherein, The array substrate comprises a second substrate and an insulating layer located on a side of the second substrate facing the color filter substrate, the insulating layer is located in the blind hole region, and the second sub-supporting column is in contact with the insulating layer.

10. The display panel of claim 9, wherein, The second sub-supporting column is fixedly bonded with the insulating layer.

Images