Display panel and display device

Abstract

Embodiments of the present application disclose a display panel and a display device, and relate to the technical field of display. The display device comprises a display panel, and the display panel comprises an array substrate, the array substrate comprises a substrate, a plurality of insulating stacked layers and a privacy structure, the privacy structure comprises a plurality of metal layers extending along a second direction, the plurality of metal layers are arranged between the plurality of insulating stacked layers respectively, and projections of the plurality of metal layers on the substrate coincide or partially coincide. Embodiments of the present application utilize a plurality of metal layers and other film layers to form a longitudinal stacked layer structure on the array substrate, and cooperate with the light shielding material used, so that the visual privacy effect is realized, the transmittance of the screen is improved, and visual fatigue of a user is avoided.

Description

Technical Field

[0001] This invention relates to the field of display technology, and more specifically to a display panel and a display device. Background Technology

[0002] Display products are now widely used in personal display devices, and for the sake of user privacy, the demand for privacy protection features will inevitably become more and more common.

[0003] While current privacy screen protectors do offer privacy protection, they are primarily based on the principle of venetian blinds. Although this protector can prevent peeping, it reduces light transmittance, significantly decreasing the surface brightness of the display device. This results in an overly dark screen that can cause eye strain and urgently needs improvement. Summary of the Invention

[0004] The purpose of this application is to provide a display panel and display device that provides privacy protection between multiple insulating stacked layers, thereby improving screen transmittance and avoiding visual fatigue for users.

[0005] This application provides a display panel, including an array substrate, the array substrate comprising:

[0006] Substrate;

[0007] Multiple insulating stacked layers are disposed on one side of the substrate; and

[0008] A privacy shield structure is disposed on the same side of the substrate as the plurality of insulating stacked layers;

[0009] The privacy shield structure includes a plurality of metal layers extending along a second direction, the plurality of metal layers being disposed between the plurality of insulating stacked layers, and the projections of the plurality of metal layers on the substrate overlapping or partially overlapping.

[0010] Optionally, in some embodiments of this application, a light-shielding layer, a gate layer, and a source / drain layer are respectively disposed between the plurality of insulating stacked layers; the plurality of metal layers are respectively disposed in the same layer as one of the light-shielding layer, the gate layer, and the source / drain layer.

[0011] Optionally, in some embodiments of this application, the plurality of metal layers includes a first metal layer disposed in the same layer as the light-shielding layer. The first metal layer includes a first light-shielding portion and a second light-shielding portion, which are respectively disposed on opposite sides of the light-shielding layer along a first direction.

[0012] Optionally, in some embodiments of this application, the plurality of metal layers includes a second metal layer disposed on the same layer as the gate layer; the second metal layer includes a third light-shielding portion and a fourth light-shielding portion, the third light-shielding portion and the fourth light-shielding portion being respectively disposed at intervals on opposite sides of the gate layer along a first direction.

[0013] Optionally, in some embodiments of this application, the plurality of metal layers includes a third metal layer disposed in the same layer as the source and drain layers; the third metal layer is disposed at intervals on the side of the drain away from the source, and the projection of the source and the plurality of metal layers on the substrate at least partially overlaps.

[0014] Optionally, in some embodiments of this application, a first pixel electrode and a second pixel electrode are disposed between the plurality of insulating stacked layers, the first pixel electrode is connected to the drain, the second pixel electrode is located on the side of the first pixel electrode away from the drain, and the second pixel electrode is connected to the first pixel electrode.

[0015] The privacy structure further includes a first photoresist layer disposed between the plurality of insulating stacked layers, wherein the first photoresist layer is disposed in the same layer as the second pixel electrode;

[0016] The first photoresist layer includes two first black photoresists, which are respectively disposed at intervals on opposite sides of the second pixel electrode along the first direction, and the projections of the two first black photoresists on the substrate coincide or partially coincide with the projections of the plurality of metal layers on the substrate.

[0017] Optionally, in some embodiments of this application, a common electrode layer is provided on the side of the plurality of insulating stacked layers facing away from the substrate;

[0018] The privacy shield structure further includes a second photoresist layer disposed on the side of the plurality of insulating stacked layers facing away from the substrate, wherein the second photoresist layer is disposed in the same layer as the common electrode layer;

[0019] The second photoresist layer includes two second black photoresists, which are respectively disposed at intervals on opposite sides of the common electrode layer along the first direction, and the projections of the two second black photoresists on the substrate coincide or partially coincide with the projections of the plurality of metal layers on the substrate.

[0020] Optionally, in some embodiments of this application, the plurality of insulating stacked layers include:

[0021] A buffer layer is disposed on the substrate and covers a light-shielding layer;

[0022] A gate insulating layer is disposed on the buffer layer to support the gate layer;

[0023] A first interlayer dielectric layer is disposed on the gate insulating layer. The first interlayer dielectric layer covers the gate layer and is used to support the source and drain layers.

[0024] The second interlayer dielectric layer is disposed on the first interlayer dielectric layer and covers the source and drain layers;

[0025] A planarization layer is disposed on the second interlayer dielectric layer to support the first photoresist layer;

[0026] A passivation layer is disposed on the planarization layer, the passivation layer covers the first photoresist layer and is used to support the second photoresist layer;

[0027] The buffer layer, the gate insulating layer, the first interlayer dielectric layer, the second interlayer dielectric layer, the planarization layer, and the passivation layer include at least two films with different refractive indices.

[0028] Optionally, in some embodiments of this application, the display panel further includes a color filter substrate disposed opposite to the array substrate, wherein a black matrix is ​​disposed on the side of the color filter substrate near the array substrate, and the projection of the black matrix on the substrate coincides with or partially coincides with the projection of the privacy shield structure on the substrate.

[0029] Accordingly, this application also provides a display device, including the display panel described above.

[0030] The beneficial effects of the embodiments of this application are as follows:

[0031] This application provides a display panel and display device. Multiple metal layers, along with source / drain layers, a first photoresist layer, a second photoresist layer, and other film layers, form a vertical privacy shield structure on an array substrate. Combined with the light-shielding material used, this achieves vertical light shielding and privacy protection, while also improving screen transmittance and preventing visual fatigue for users. Furthermore, some film layers are configured on the same layer, increasing the graphic effect without adding a photomask. The first photoresist layer, the second photoresist layer, and the black matrix can share a photomask, thus achieving privacy protection while avoiding increased manufacturing complexity, indirectly ensuring product yield. Attached Figure Description

[0032] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0033] Figure 1 This is a schematic diagram illustrating the principle of an existing privacy screen protector.

[0034] Figure 2 This is a schematic diagram of the film layer stacking of a display panel provided in an embodiment of this application;

[0035] Figure 3 This is a schematic diagram of the film layer structure of an array substrate provided in an embodiment of this application;

[0036] Figure 4 yes Figure 3 The cross-sectional diagram along the AA direction is mainly used to illustrate the privacy screen structure.

[0037] Explanation of reference numerals in the attached figures: 100, array substrate; 110, substrate; 120, light-transmitting area; 130, light-shielding layer; 140, gate layer; 150, source / drain layer; 151, source; 152, drain; 160, first pixel electrode; 170, second pixel electrode; 180, conductive metal layer; 190, common electrode layer; 200, color filter substrate; 210, black matrix; 300, privacy screen structure; 310, first metal layer; 311, first light-shielding portion; 312, second light-shielding portion; 320, second metal layer; 321. Third light-shielding section; 322. Fourth light-shielding section; 330. Third metal layer; 340. First photoresist layer; 341. First black photoresist; 350. Second photoresist layer; 351. Second black photoresist; 400. Insulating stack layer; 410. Buffer layer; 420. Gate insulating layer; 430. Interlayer dielectric layer; 431. First interlayer dielectric layer; 432. Second interlayer dielectric layer; 440. Planarization layer; 441. First planarization layer; 442. Second planarization layer; 450. Passivation layer; 500. Liquid crystal. Detailed Implementation

[0038] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application. In addition, it should be understood that the specific embodiments described herein are only for illustration and explanation of this application and are not intended to limit this application. In this application, unless otherwise stated, directional terms such as "upper" and "lower" generally refer to the upper and lower positions of the device in actual use or operation, specifically the drawing directions in the accompanying drawings; while "inner" and "outer" refer to the outline of the device.

[0039] Currently, privacy films are mainly made based on the principle of venetian blinds. Although such privacy films can achieve privacy, they greatly reduce the surface brightness of the display device, which is a significant drawback.

[0040] like Figure 1 As shown in the figure, a schematic diagram of the principle of an existing privacy screen protector is provided. Based on ultra-fine venetian blind technology, hundreds or thousands of slats are embedded in a single film, thereby achieving the effect of not affecting the view when looking directly at the screen, but darkening the screen when viewed from the side. Typically, the transmittance of this type of privacy screen protector is around 60-70%, which means that while achieving the privacy effect, it results in a significant loss of brightness when viewed directly at the screen.

[0041] To address the above problems, this application provides a privacy screen structure and display device, which will be described in detail below. It should be noted that the order of description of the following embodiments is not intended to limit the preferred order of the embodiments.

[0042] Example 1

[0043] This embodiment provides a display panel that differs from the privacy protection mode of the aforementioned privacy films. This display panel adopts a fixed in-box privacy protection mode, that is, it directly changes the existing structure of the display panel to achieve a fixed privacy protection effect.

[0044] Please see Figure 2 and Figure 3 In this embodiment, the display panel can be a liquid crystal display panel, which includes an array substrate 100 and a color filter substrate 200 disposed opposite to each other, and a liquid crystal 500 is disposed between the array substrate 100 and the color filter substrate 200.

[0045] Specifically, the array substrate 100 includes a substrate 110, on which a plurality of insulating stacked layers 400 and a privacy shield structure 300 are disposed. The privacy shield structure 300 and the plurality of insulating stacked layers 400 are disposed on the same side of the substrate 110; and the privacy shield structure 300 includes a plurality of metal layers, which are respectively disposed between the plurality of insulating stacked layers 400, and the projections of the plurality of metal layers on the substrate 110 overlap or partially overlap, thereby forming a longitudinal light-shielding structure on the array substrate 100 to achieve privacy protection.

[0046] In this embodiment, the substrate 110 can be a glass substrate. The plurality of insulating stacked layers 400 include a buffer layer 410 disposed on the substrate 110, a gate insulating layer 420 disposed on the buffer layer 410, an interlayer dielectric layer 430 disposed on the gate insulating layer 420, a planarization layer 440 disposed on the interlayer dielectric layer 430, and a passivation layer 450 disposed on the planarization layer 440. The interlayer dielectric layer 430 includes a first interlayer dielectric layer 431 disposed on the gate insulating layer 420 and a second interlayer dielectric layer 432 disposed on the side of the first interlayer dielectric layer 431 facing away from the gate insulating layer 420.

[0047] In this embodiment, a light-shielding layer 130 is disposed on the substrate 110, a buffer layer 410 covers the light-shielding layer 130, and an active layer is disposed on the buffer layer 410; a gate insulating layer 420 covers the active layer, and a gate layer 140 is disposed on the gate insulating layer 420; a first interlayer dielectric layer 431 covers the gate layer 140, and an active drain layer 150 is disposed on the first interlayer dielectric layer 431; a second interlayer dielectric layer 432 covers the active drain layer 150.

[0048] Please see the appendix Figure 3 and attached Figure 4 For ease of understanding, the directions in the accompanying drawings are defined as follows in this embodiment: the first direction X is... Figure 3 The horizontal direction, i.e., the transverse direction; the second direction Y Figure 3 The vertical direction in the middle, i.e., the longitudinal direction; the third direction Z is Figure 3 The direction perpendicular to the paper; the first direction X, the second direction Y, and the third direction Z can together form a coordinate system.

[0049] In this embodiment, the aforementioned plurality of metal layers include a first metal layer 310 disposed on the same layer as the light-shielding layer 130, and a buffer layer 410 simultaneously covering the first metal layer 310 and the light-shielding layer 130. The first metal layer 310 includes a first light-shielding portion 311 and a second light-shielding portion, both of which extend along the second direction Y on the substrate 110, and are respectively disposed on opposite sides of the light-shielding layer 130 along the first direction X.

[0050] Since both the first light-shielding portion 311 and the second light-shielding portion extend along the second direction Y on the substrate 110, the first light-shielding portion 311 and the second light-shielding portion can protrude a certain height relative to the light-shielding layer 130 in the second direction Y to increase the longitudinal light-shielding area. The specific value of the protrusion height of the first light-shielding portion 311 and the second light-shielding portion relative to the light-shielding layer 130 can be flexibly optimized according to needs, and no specific limitation is made thereto.

[0051] Meanwhile, when fabricating the first metal layer 310, the first metal layer 310 can be made of the same metal material as the light-shielding layer 130; and since the first metal layer 310 and the light-shielding layer 130 are disposed on the same layer, when fabricating the array substrate 100, the first metal layer 310 and the light-shielding layer 130 can be fabricated using the same photomask, which is equivalent to changing the pattern of the original photomask, thereby avoiding the need to add a photomask and preventing increased process difficulty.

[0052] Please see Figure 2 and Figure 3In this embodiment, the gate layer 140 is disposed on the gate insulating layer 420 and is covered by the first interlayer dielectric layer 431. To further improve the privacy protection effect, the plurality of metal layers also include a second metal layer 320 disposed in the same layer as the gate layer 140, that is, the first interlayer dielectric layer 431 covers both the gate layer 140 and the second metal layer 320.

[0053] Specifically, the second metal layer 320 includes a third light-shielding portion 321 and a fourth light-shielding portion 322, which can be respectively disposed on opposite sides of the gate layer 140 along the first direction X.

[0054] Both the third light-shielding portion 321 and the fourth light-shielding portion 322 can extend along the second direction Y on the gate insulating layer 420 to increase their light-shielding area. The specific extension height can be flexibly optimized as needed and is not specifically limited.

[0055] When fabricating the second metal layer 320, it can be made of the same metal material as the gate layer 140, or a different metal light-shielding material can be selected as needed; there is no specific limitation in this regard. Since the second metal layer 320 and the gate layer 140 are disposed on the same layer, the second metal layer 320 and the gate layer 140 can be fabricated using the same photomask when fabricating the array substrate 100. This is equivalent to changing the pattern of the original photomask, thereby further saving photomasks, reducing production costs, and simplifying the process.

[0056] It is understood that the second metal layer 320 is disposed on the side of the first metal layer 310 facing away from the substrate 110. Furthermore, the third light-shielding portion 321 and the fourth light-shielding portion 322 can respectively correspond to the first light-shielding portion 311 and the second light-shielding portion 312 mentioned above; for example, in the second direction Y, the third light-shielding portion 321 can be disposed exactly opposite the first light-shielding portion 311, while the fourth light-shielding portion 322 can be disposed exactly opposite the second light-shielding portion 312.

[0057] Of course, the relative positional relationship between the first metal layer 310 and the second metal layer 320 can also be adjusted as needed. It is only necessary to ensure that the projections of the third light-shielding part 321 and the fourth light-shielding part 322 on the substrate 110 coincide or partially coincide with the projections of the first light-shielding part 311 and the second light-shielding part 312 on the substrate 110.

[0058] Please see Figure 2 and Figure 3In this embodiment, the source / drain layer 150 is disposed on the first interlayer dielectric layer 431 and covered by the second interlayer dielectric layer 432. To further improve the privacy protection effect, the plurality of metal layers also include a third metal layer 330 disposed in the same layer as the source / drain layer 150, that is, the second interlayer dielectric layer 432 covers both the source / drain layer 150 and the third metal layer 330.

[0059] Specifically, the source-drain layer 150 includes a source electrode 151 and a drain electrode 152 spaced apart along the first direction X. The source electrode 151 and the drain electrode 152 can be electrically connected to the active layer via vias. A third metal layer 330 is spaced apart on the side of the drain electrode 152 away from the source electrode 151, and the third metal layer 330 can extend along the second direction Y on the first interlayer dielectric layer 431 to increase its light-shielding area.

[0060] To ensure privacy protection, when actually fabricating the source and drain layers 150 and the third metal layer 330, the projection of the source 151 on the substrate 110 can coincide with or partially coincide with the projections of the multiple metal layers on the substrate 110, and the projection of the third metal layer 330 on the substrate 110 coincides with or partially coincides with the projections of the first metal layer 310 and the second metal layer 320.

[0061] In this embodiment, the side of the source electrode 151 projected onto the substrate 110 that is away from the projection of the drain electrode 152 can coincide with the projections of the first light-shielding portion 311 and the third light-shielding portion 321; while the projection of the third metal layer 330 onto the substrate 110 can coincide with or partially coincide with the projections of the second light-shielding portion 312 and the fourth light-shielding portion 322. Of course, the relative positional relationship between the third metal layer 330 and the first metal layer 310 and the second metal layer 320 can be adjusted as needed, as long as their projection coincidence is maintained.

[0062] In this embodiment, when fabricating the third metal layer 330, the third metal layer 330 can be made of the same metal material as the source / drain layer 150, or different metal light-shielding materials can be selected as needed; no specific limitation is made in this regard. Furthermore, since the third metal layer 330 and the source / drain layer 150 are disposed on the same layer, when fabricating the array substrate 100, the third metal layer 330 and the source / drain layer 150 can be fabricated using the same photomask, which is equivalent to changing the pattern of the original photomask and avoiding the need to add a photomask, thereby further saving photomasks, reducing production costs, and reducing process difficulty.

[0063] In this embodiment, a first pixel electrode 160 is disposed on the second interlayer dielectric layer 432. The first pixel electrode 160 is electrically connected to the drain electrode 152 through a via disposed on the first planarization layer 441. An opening region is formed on the first pixel electrode 160, and a second planarization layer 442 is disposed in the opening region.

[0064] Meanwhile, a second pixel electrode 170 may also be disposed on the first planarization layer 441. The second pixel electrode 170 is electrically connected to the first pixel electrode 160, and the passivation layer 450 covers the second pixel electrode 170 entirely.

[0065] In addition, a metal conductive layer 180 and a common electrode layer 190 may be disposed on the passivation layer 450, and the metal conductive layer 180 and the common electrode layer 190 are electrically connected; wherein, the common electrode layer 190 can be a transparent electrode.

[0066] In this embodiment, to further improve the privacy protection effect, the above-mentioned privacy protection structure also includes a first photoresist layer 340 disposed on the first planarization layer 441. The first photoresist layer 340 is disposed on the same layer as the second pixel electrode 170, and includes two first black photoresist layers 341 disposed at intervals along the first direction X. The two first black photoresist layers 341 can be disposed at intervals on opposite sides of the second pixel electrode 170 along the first direction X.

[0067] Specifically, the projection of the first photoresist layer 340 onto the substrate 110 can coincide with or partially coincide with the projections of multiple metal layers onto the substrate 110. For example, two first black photoresists 341 can correspond to the first light-shielding portion 311 and the second light-shielding portion 312 mentioned above, respectively. That is, in the second direction Y, the projection of one first black photoresist 341 onto the substrate 110 can coincide with or partially coincide with the projection of the first light-shielding portion 311 onto the substrate 110, and the projection of the other first black photoresist 341 onto the substrate 110 can coincide with or partially coincide with the projection of the second light-shielding portion 312 onto the substrate 110.

[0068] Based on the previously described correspondence between the first metal layer 310, the second metal layer 320, and the third metal layer 330, it can be seen that the first photoresist layer 340 and the multiple metal layers can together form a longitudinal light-shielding structure on the array substrate 100 to improve the privacy protection effect.

[0069] In this embodiment, to further improve the privacy protection effect, the privacy protection structure further includes a second photoresist layer 350 disposed on the passivation layer 450. The second photoresist layer 350 is disposed in the same layer as the common electrode layer 190, and includes two second black photoresist 351s disposed at intervals along the first direction X. One of the second black photoresist 351s is disposed at intervals on the side of the metal conductive layer 180 away from the common electrode layer 190 along the first direction X, and the other second black photoresist 351 is disposed at intervals on the side of the common electrode layer 190 away from the metal conductive layer 180 along the first direction X.

[0070] Specifically, the projection of the second photoresist layer 350 onto the substrate 110 can coincide with or partially coincide with the projections of multiple metal layers onto the substrate 110. For example, two second black photoresists 351 can respectively correspond to the first light-shielding portion 311 and the second light-shielding portion 312 mentioned above, that is, in the second direction Y, the projection of one second black photoresist 351 onto the substrate 110 can coincide with or partially coincide with the projection of the first light-shielding portion 311 onto the substrate 110, and the projection of the other second black photoresist 351 onto the substrate 110 can coincide with or partially coincide with the projection of the second light-shielding portion 312 onto the substrate 110.

[0071] Based on the previously described correspondence between the first metal layer 310, the second metal layer 320, the third metal layer 330, and the first photoresist layer 340, it can be seen that the first photoresist layer 340, the second photoresist layer 350, and the multiple metal layers can jointly form a longitudinal light-shielding structure on the array substrate 100, thereby further improving the privacy protection effect.

[0072] Please see Figure 3 For ease of description, the first light-shielding part 311, the third light-shielding part 321, the source electrode 151, the first black photoresist 341 on the left and the second black photoresist 351 on the left are collectively referred to as the left privacy structure, and the second light-shielding part 312, the fourth light-shielding part 322, the third metal layer 330, the first black photoresist 341 on the right and the second black photoresist 351 on the right are referred to as the right privacy structure.

[0073] In this embodiment, a light-transmitting area 120 will be formed between the right-side privacy structure and the light-shielding layer 130. Correspondingly, the first pixel electrode 160 and the second pixel electrode 170 mentioned above are both transparent electrodes, and the first pixel electrode 160 and the second pixel electrode 170 can extend along the first direction X toward the side where the light-transmitting area 120 is located.

[0074] In fact, after the first metal layer 310, the second metal layer 320, the third metal layer 330, the source electrode 151, the first photoresist layer 340, and the second photoresist layer 350 jointly form the aforementioned privacy screen structure 300, it is equivalent to forming such a structure within the array substrate 100. Figure 4 The vertically stacked structure shown in the figure is made of a light-shielding material. When light enters the vertically stacked structure, light at large angles will be blocked, thus achieving a privacy protection effect.

[0075] Specifically, in this embodiment, to ensure the privacy protection effect, the first metal layer 310, the second metal layer 320 and the third metal layer 330 can be made of light-shielding material; the light-shielding material can be flexibly selected as needed, for example, it can be one of molybdenum and tungsten, or it can be a metal stacked structure of molybdenum and tungsten, and there is no specific limitation on this.

[0076] Similarly, the materials of the first photoresist layer 340 and the second photoresist layer 350 can be organic black materials, inorganic black materials, or the aforementioned light-shielding materials, and there are no specific limitations on these materials.

[0077] Among them, organic black materials can be diphenylene oxide black, aniline black, anthocyanin black, etc.; inorganic black materials can be carbon black (such as CIpigment black 7, MA100, #1000, #2650 manufactured by Mitsubishi Chemical, etc.), titanium oxide, chromium oxide, iron oxide or graphite; no specific limitation is made in this regard.

[0078] In this embodiment, the materials of the buffer layer 410, gate insulating layer 420, first interlayer dielectric layer 431, second interlayer dielectric layer 432, first planarization layer 441, second planarization layer 442 and passivation layer 450 can all be at least one of silicon nitride film and silicon oxide film, that is, it can be a silicon nitride film, a silicon oxide film, or a composite film of silicon nitride film and silicon oxide film, without specific limitation.

[0079] In this embodiment, the buffer layer 410, gate insulating layer 420, first interlayer dielectric layer 431, second interlayer dielectric layer 432, first planarization layer 441, second planarization layer 442, and passivation layer 450 include at least two layers with different refractive indices. Furthermore, the refractive index of the silicon nitride layer used in this embodiment is adjustable within the range of 1.5-1.9, and the refractive index of the silicon oxide layer is adjustable within the range of 1.4-1.6. For example, when multiple insulating stacked layers 400 all use silicon nitride layers, the refractive index of the buffer layer 410 can be 1.5, and the refractive index of the first planarization layer 441 can be 1.7; thus, light will be refracted between the layers, ultimately achieving the effect of the light path contracting inward.

[0080] In this way, the buffer layer 410, the gate insulating layer 420, the first interlayer dielectric layer 431, the second interlayer dielectric layer 432, the first planarization layer 441, the second planarization layer 442, and the passivation layer 450 can form a stacked structure of multiple layers with different refractive indices between the array substrate 100 and the color filter substrate 200. By reasonably controlling the specific refractive index of each layer, light can be gradually refracted as it passes through each layer, ultimately achieving the effect of light collection.

[0081] It should be understood that the refractive indices of the buffer layer 410, gate insulating layer 420, first interlayer dielectric layer 431, second interlayer dielectric layer 432, planarization layer 440, and passivation layer 450 can be flexibly selected as needed. For example, in one embodiment, the refractive indices of the buffer layer 410, gate insulating layer 420, first interlayer dielectric layer 431, second interlayer dielectric layer 432, planarization layer 440, and passivation layer 450 can gradually increase from bottom to top. Of course, other settings can be used for the refractive indices of each layer, and no specific limitation is made thereto.

[0082] Please see Figure 2 and Figure 3 In this embodiment, a black matrix 210 is also provided on the side of the color filter substrate 200 near the array substrate 100. The black matrix 210 can be made of a photoresist material with extremely low transmittance, such as the organic black material mentioned above, or other materials such as inorganic black materials, without specific limitations.

[0083] Specifically, the projections of the black matrix 210, the first photoresist layer 340, and the second photoresist layer 350 onto the substrate 110 can be controlled to overlap or partially overlap. Furthermore, since the multiple metal layers, the first photoresist layer 340, and the second photoresist layer 350 together form a vertically stacked structure, the black matrix 210, the first photoresist layer 340, and the second photoresist layer 350 can share a single photomask during actual fabrication, thereby further saving on photomasks and helping to reduce production costs.

[0084] In another embodiment, the aforementioned black matrix 210 can also be omitted, that is, the black matrix 210 can be omitted from the color filter substrate 200. Since the black matrix 210 mainly serves to prevent light leakage in the display panel, and the projections of the black matrix 210, the first photoresist layer 340, and the second photoresist layer 350 on the array substrate 100 overlap or partially overlap, multiple metal layers can form a vertical stacked structure together with the first photoresist layer 340 and the second photoresist layer 350. Therefore, the multiple metal layers are actually correspondingly arranged with the aforementioned black matrix 210. Through the blocking effect of the multiple metal layers, the first photoresist layer 340, and the second photoresist layer 350, the function of preventing light leakage can be achieved, so the aforementioned black matrix 210 can be omitted.

[0085] In this embodiment, a vertical stacked structure is formed by the first metal layer 310, the second metal layer 320, the source electrode 151, the third metal layer 330, the first photoresist layer 340, and the second photoresist layer 350. Combined with the light-shielding material used, vertical light shielding and privacy protection are achieved, and the screen transmittance is improved to avoid causing visual fatigue to the user.

[0086] In this embodiment, the aforementioned left-side and right-side privacy structures can be arranged parallel to each other on opposite sides (such as the left and right sides) of the entire display area of ​​the display panel to achieve overall privacy protection; alternatively, the left-side and right-side privacy structures can be arranged parallel to each other on opposite sides (such as the left and right sides) of a local display area in the display panel to achieve local privacy protection. Specifically, this can be determined according to the user's consumption needs, and no specific limitations are imposed.

[0087] Please see Figure 2 , Figure 2 This is a schematic diagram of the structure when an LCD display panel is used. In this case, the display panel includes an array substrate 100, a color filter substrate 200 disposed opposite to the array substrate 100, and a liquid crystal 500 disposed between the array substrate 100 and the color filter substrate 200.

[0088] The array substrate 100 is provided with thin-film transistors and the aforementioned privacy protection structure 300. The privacy protection structure 300 includes multiple metal layers, a first photoresist layer 340, and a second photoresist layer 350, etc. Each film layer can form a vertical light-shielding structure on the array substrate 100 to achieve vertical light shielding of the corresponding pixel area, thereby achieving a privacy protection effect.

[0089] However, it should be understood that the aforementioned display panel can also be an OLED display panel, and its privacy protection principle remains unchanged. Therefore, the display panel in this embodiment can be either an LCD display panel or an OLED display panel, and no specific limitation is made in this regard.

[0090] Example 2

[0091] This embodiment also provides a display device, including the aforementioned display panel. By utilizing the privacy protection effect of the display panel, the entire display device achieves the following: brightness and visual effect are unaffected when viewed directly, while brightness decreases drastically when viewed at an angle, making it visually invisible.

[0092] The aforementioned display devices may include any product or component with display function, such as mobile phones, tablets, televisions, monitors, laptops, digital photo frames, and navigators.

[0093] In the above embodiments, the descriptions of each embodiment have different focuses. For parts not described in detail in a certain embodiment, please refer to the relevant descriptions in other embodiments.

[0094] The above provides a detailed description of a display panel and display device provided in the embodiments of this application. Specific examples have been used to illustrate the principles and implementation methods of this application. The description of the above embodiments is only for the purpose of helping to understand the method and core ideas of this application. At the same time, for those skilled in the art, there will be changes in the specific implementation methods and application scope based on the ideas of this application. Therefore, the content of this specification should not be construed as a limitation of this application.

Claims

1. A display panel, characterized in that, Includes an array substrate, the array substrate comprising: Substrate; Multiple insulating stacked layers are disposed on one side of the substrate; and A privacy shield structure is disposed on the same side of the substrate as the plurality of insulating stacked layers; The privacy shield structure includes a plurality of metal layers extending along a second direction, the plurality of metal layers being disposed between the plurality of insulating stacked layers, and the projections of the plurality of metal layers on the substrate overlapping or partially overlapping. A light-shielding layer, a gate layer, and a source / drain layer are respectively disposed between the plurality of insulating stacked layers; The plurality of metal layers include a first metal layer disposed in the same layer as the light-shielding layer. The first metal layer includes a first light-shielding portion and a second light-shielding portion, which are respectively disposed on opposite sides of the light-shielding layer along a first direction. The plurality of metal layers include a second metal layer disposed in the same layer as the gate layer; the second metal layer includes a third light-shielding portion and a fourth light-shielding portion, the third light-shielding portion and the fourth light-shielding portion being respectively disposed at intervals on opposite sides of the gate layer along the first direction; The source-drain layer includes a source and a drain that are spaced apart along the first direction. The side of the projection of the source on the substrate that is away from the projection of the drain on the substrate coincides with the projection portions of the first light-shielding portion and the third light-shielding portion on the substrate.

2. The display panel according to claim 1, characterized in that, The plurality of metal layers includes a third metal layer disposed in the same layer as the source and drain layers; the third metal layer is disposed at intervals on the side of the drain away from the source.

3. The display panel according to claim 1, characterized in that, A first pixel electrode and a second pixel electrode are disposed between the plurality of insulating stacked layers. The first pixel electrode is connected to the drain electrode, and the second pixel electrode is located on the side of the first pixel electrode away from the drain electrode, and the second pixel electrode is connected to the first pixel electrode. The privacy structure further includes a first photoresist layer disposed between the plurality of insulating stacked layers, wherein the first photoresist layer is disposed in the same layer as the second pixel electrode; The first photoresist layer includes two first black photoresists, which are respectively disposed at intervals on opposite sides of the second pixel electrode along the first direction, and the projections of the two first black photoresists on the substrate coincide or partially coincide with the projections of the plurality of metal layers on the substrate.

4. The display panel according to claim 3, characterized in that, A common electrode layer is provided on the side of the plurality of insulating stacked layers facing away from the substrate; The privacy shield structure further includes a second photoresist layer disposed on the side of the plurality of insulating stacked layers facing away from the substrate, wherein the second photoresist layer is disposed in the same layer as the common electrode layer; The second photoresist layer includes two second black photoresists, which are respectively disposed at intervals on opposite sides of the common electrode layer along the first direction, and the projections of the two second black photoresists on the substrate coincide or partially coincide with the projections of the plurality of metal layers on the substrate.

5. The display panel according to any one of claims 1-4, characterized in that, The plurality of insulating stacked layers include: A buffer layer is disposed on the substrate and covers a light-shielding layer; A gate insulating layer is disposed on the buffer layer to support the gate layer; A first interlayer dielectric layer is disposed on the gate insulating layer. The first interlayer dielectric layer covers the gate layer and is used to support the source and drain layers. The second interlayer dielectric layer is disposed on the first interlayer dielectric layer and covers the source and drain layers; A planarization layer is disposed on the second interlayer dielectric layer to support the first photoresist layer; A passivation layer is disposed on the planarization layer, the passivation layer covers the first photoresist layer and is used to support the second photoresist layer; The buffer layer, the gate insulating layer, the first interlayer dielectric layer, the second interlayer dielectric layer, the planarization layer, and the passivation layer include at least two films with different refractive indices.

6. The display panel according to any one of claims 1-4, characterized in that, The display panel also includes a color filter substrate disposed opposite to the array substrate. A black matrix is ​​disposed on the side of the color filter substrate near the array substrate. The projection of the black matrix on the substrate coincides with or partially coincides with the projection of the privacy shield structure on the substrate.

7. A display device, characterized in that, Includes the display panel as described in any one of claims 1-6.

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