Display panel and display device

Abstract

The application belongs to the technical field of display, and particularly relates to a display panel and a display device. The display panel comprises a substrate, a pixel definition layer, a display light-emitting structure, a light-adjusting structure and a first encapsulation layer. The display light-emitting structure comprises a display light-emitting diode, which comprises a display light-emitting part for emitting display light. The light-adjusting structure comprises a light-adjusting light-emitting diode provided with a light-adjusting light-emitting part and a light-shielding part located on a side of the light-adjusting light-emitting diode away from the substrate. The light-emitting color of the light-adjusting light-emitting part is different from the light-emitting color of the display light-emitting part adjacent to the light-adjusting light-emitting part. The first encapsulation layer comprises an adjustment area provided with a first inclined surface with an angle range of 35-50 degrees. The light emitted by the light-adjusting light-emitting part at the edge position and parallel to the inclination angle of the first inclined surface forms a light-emitting point with the top surface of the adjustment area. The line connecting the light-emitting point and the bottom edge of the light-shielding part forms a first included angle with the top surface of the first encapsulation layer, which is greater than or equal to the inclination angle of the first inclined surface, so as to improve the privacy effect of the anti-peeping angle.

Description

Technical Field

[0001] The present application belongs to the field of display technology, and specifically relates to a display panel and a display device. Background Art

[0002] As users' awareness of privacy protection grows, there's a huge market demand for privacy-preventing technology for display devices. Traditional privacy-preventing displays rely on a privacy film attached to the display surface. This film utilizes ultra-fine Venetian blinds, similar in principle to vertical Venetian blinds. While this privacy-preventing method is simple and convenient, it severely impacts visual quality.

[0003] Currently, a black matrix (BM) structure is used to form an organic light-emitting diode (OLED) anti-peeping pixel structure to achieve an anti-peeping mode. However, this mode results in high brightness at small viewing angles and low brightness at anti-peeping viewing angles, resulting in a small amount of anti-peeping light at anti-peeping viewing angles, which in turn leads to poor anti-peeping effect. Summary of the Invention

[0004] The purpose of this application is to solve the problem in the prior art that the black matrix anti-peeping pixel structure has high brightness at a small viewing angle and low brightness at an anti-peeping viewing angle, resulting in a small amount of anti-peeping light at the anti-peeping viewing angle, and thus resulting in poor anti-peeping effect.

[0005] According to a first aspect of the present application, there is provided a display panel, comprising a substrate, the substrate having a display area, the display panel further comprising: a pixel definition layer, the pixel definition layer having a plurality of pixel openings spaced apart from each other and a pixel definition portion located between adjacent pixel openings, wherein the distance between adjacent pixel definition portions gradually increases in the direction from the substrate to the pixel definition layer; a plurality of display light-emitting structures, each of the display light-emitting structures comprising a display light-emitting diode, the display light-emitting diode comprising a display light-emitting portion, at least a portion of each display light-emitting portion being located within one of the pixel openings; and a plurality of dimming structures, the dimming structures being provided between adjacent display light-emitting structures, the dimming structures comprising a dimming light-emitting diode and a shading portion, the dimming light-emitting diode comprising a dimming light-emitting portion, at least a portion of the dimming light-emitting portion being located within one of the pixel openings, the shading portion being located on a side of the dimming light-emitting diode away from the substrate. The orthographic projection of the light-emitting portion on the base substrate is located within the orthographic projection of the light-shielding portion on the base substrate, and the light-emitting color of the dimming light-emitting portion is different from the light-emitting color of the display light-emitting portion adjacent to it; a first encapsulation layer is provided on the side of the light-shielding portion close to the base substrate, and is used to cover the display light-emitting diode, the dimming light-emitting diode and the pixel definition layer, the first encapsulation layer includes an adjustment area, the orthographic projection of the adjustment area on the base substrate is located within the orthographic projection of the light-shielding portion on the base substrate, the adjustment area is provided with a first inclined surface, and the inclination angle of the first inclined surface ranges from 35° to 50°; wherein, the dimming light-emitting portion located at the edge of the pixel opening emits light parallel to the inclination angle of the first inclined surface and forms a light-emitting point with the top surface of the adjustment area, and the line connecting the light-emitting point and the bottom edge of the light-shielding portion forms a first angle with the top surface of the first encapsulation layer, and the first angle is greater than or equal to the inclination angle of the first inclined surface.

[0006] In an exemplary embodiment of the present application, the pixel defining portion has a second inclined surface, and an inclination angle of the second inclined surface is the same as an inclination angle of the first inclined surface.

[0007] In an exemplary embodiment of the present application, the height of the pixel defining portion is 2 um.

[0008] In an exemplary embodiment of the present application, a cross-sectional area of ​​the light shielding portion gradually increases in a direction from the base substrate to the display light emitting portion.

[0009] In an exemplary embodiment of the present application, the light shielding portion has a second angle, the second angle is smaller than or equal to the first angle, and the second angle is smaller than or equal to the inclination angle of the first inclined surface.

[0010] In an exemplary embodiment of the present application, the display panel further includes a second encapsulation layer and a third encapsulation layer stacked sequentially, the third encapsulation layer is arranged on a side of the second encapsulation layer away from the first encapsulation layer, and the light-shielding portion is arranged on a side of the third encapsulation layer away from the base substrate.

[0011] In an exemplary embodiment of the present application, the display panel further includes a touch electrode layer, which is disposed on a side of the third encapsulation layer away from the second encapsulation layer, and the light shielding portion is disposed on a side of the touch electrode layer away from the third encapsulation layer.

[0012] In an exemplary embodiment of the present application, the display panel further includes a color resist layer, which is disposed on a side of the touch electrode layer away from the base substrate. The color resist layer includes a plurality of color resist units, each of which corresponds to one of the display light-emitting diodes.

[0013] In an exemplary embodiment of the present application, the display panel also includes a color filter unit on the same layer as the color resist unit, the color filter unit is arranged between the light shading portion and the color resist unit, and the color of the color filter unit is the same as the color of the light emitted by the dimming light emitting portion.

[0014] A second aspect of the present application provides a display device, comprising: a driver chip; and a display panel as described in any one of the above items, wherein the display panel is electrically connected to the driver chip.

[0015] The display panel and display device of the present application have at least the following beneficial effects:

[0016] The display panel in the application includes a substrate, a pixel definition layer, a plurality of display light emitting structures, a plurality of light adjusting structures and a first encapsulation layer on the substrate, the pixel definition layer defines a plurality of pixel openings arranged at intervals and a pixel definition part between adjacent pixel openings, the display light emitting structure includes a display light emitting diode, the display light emitting diode includes a display light emitting part for emitting display light, the light adjusting structure includes a light adjusting light emitting diode and a light shielding part, the light adjusting light emitting diode is arranged between adjacent display light emitting diodes, the light adjusting light emitting diode includes a light adjusting light emitting part for emitting anti-peep light, the light shielding part is located on the side of the light adjusting light emitting diode away from the substrate, and the orthogonal projection of the light adjusting light emitting part on the substrate is located in the orthogonal projection of the light shielding part on the substrate, the first encapsulation layer is arranged on the side of the light shielding part close to the substrate, and is used for covering the display light emitting diode, the light adjusting diode and the pixel definition layer, the first encapsulation layer includes an adjusting area corresponding to the light adjusting structure, the adjusting area is provided with a first inclined surface, the inclination angle of the first inclined surface ranges from 35° to 50°, the light adjusting light emitting part located at the edge of the pixel opening can emit light parallel to the inclination angle of the first inclined surface, the light can form a light emitting point with the top surface of the adjusting area, and the line connecting the light emitting point and the bottom edge of the light shielding part forms a first included angle with the top surface of the first encapsulation layer, the first included angle is greater than or equal to the inclination angle of the first inclined surface, so that the anti-peep light emitted by the light adjusting light emitting part can mostly mix with the display light of the display light emitting part, the light emitting amount of the light adjusting light emitting part under a small viewing angle is reduced, the light emitting amount under a large viewing angle is improved, the emission amount of the anti-peep light under the anti-peep angle is improved, and the anti-peep effect under the anti-peep angle is improved.

[0017] Other features and advantages of the present application will become apparent from the following detailed description, or will be learned by practice of the present application.

[0018] It should be understood that the general description above and the following detailed description are only exemplary and explanatory, and cannot limit the application. BRIEF DESCRIPTION OF DRAWINGS

[0019] The drawings incorporated into the specification and constituting a part of the specification show embodiments consistent with the application and, together with the specification, serve to explain the principles of the application. Obviously, the drawings in the following description are only some embodiments of the application, and other drawings can be obtained by those skilled in the art without creative labor on the basis of these drawings.

[0020] Figure 1 The arrangement of the display light emitting structure and the light adjusting structure on the substrate provided by the first or second embodiment of the application is shown.

[0021] Figure 2 The cross-sectional structure schematic diagram of the display panel provided by the first or second embodiment of the application is shown.

[0022] Figure 3 A schematic cross-sectional structure diagram of the dimming structure provided in Embodiment 1 or 2 of the present application is shown.

[0023] Figure 4 The figure shows the light path diagram of the light modulating light emitting portion when the inclination angle of the first inclined surface is 30 degrees in the prior art.

[0024] Figure 5 An experimental diagram of the light path emitted from the dimming light emitting portion when the inclination angle of the first inclined surface is 30° in the prior art is shown.

[0025] Figure 6 The figure shows the light path diagram of the light modulating light emitting portion when the inclination angle of the first inclined surface is 45 degrees in the prior art.

[0026] Figure 7 The figure shows an experimental diagram of the light path emitted by the light-modulating light-emitting portion when the inclination angle of the first inclined surface is 45 degrees in the prior art.

[0027] Figure 8 The figure shows the light path diagram of the light modulating light emitting portion when the inclination angle of the first inclined surface is 60 degrees in the prior art.

[0028] Figure 9 The figure shows an experimental diagram of the light path emitted by the light-modulating light-emitting portion when the inclination angle of the first inclined surface is 60 degrees in the prior art.

[0029] Figure 10 A schematic diagram of the cross-sectional structure of the third inclined surface provided in Embodiment 1 or 2 of the present application using an arc surface is shown.

[0030] Figure 11 The cross-sectional structure diagram of the display panel provided in the first or second embodiment of the present application further includes a touch electrode layer, a color resist layer and a planar layer.

[0031] Figure 12 A schematic diagram of the structure of the connection between the display panel and the driver chip provided in the first or second embodiment of the present application is shown.

[0032] Description of reference numerals:

[0033] 10. Display device; 100. Display panel; 110. Base substrate;

[0034] 120. Pixel definition layer; 121. Pixel definition unit;

[0035] 130, display light-emitting structure; 130a, red type display light-emitting structure; 130b, green type display light-emitting structure; 130c, blue type display light-emitting structure; 131, display light-emitting diode; 1310, display anode; 1311, display light-emitting portion; 1312, display cathode;

[0036] 140, dimming structure; 141, dimming light-emitting diode; 1410, dimming anode; 1411, dimming light-emitting portion; 1412, dimming cathode; 142, light shielding portion; 1420, upper surface; 1421, lower surface; 1422, third inclined surface;

[0037] 150, driving circuit layer; 160, first encapsulation layer; 161, adjustment area; 162, first inclined surface; 170, second encapsulation layer; 180, third encapsulation layer; 190, touch electrode layer; 1100, color resist layer; 1110, color resist unit; 1200, color filter unit; 1300, planar layer;

[0038] 200. Driver chip; A. Light output point. DETAILED DESCRIPTION

[0039] Example embodiments will now be described more fully with reference to the accompanying drawings. However, example embodiments can be implemented in many forms and should not be construed as limited to the examples set forth herein; rather, these embodiments are provided so that this application will be thorough and complete and will fully convey the concepts of the example embodiments to those skilled in the art.

[0040] In this application, the terms "first" and "second" are used for descriptive purposes only and should not be understood to indicate or imply relative importance or implicitly specify the number of the technical features indicated. Therefore, a feature specified as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, "plurality" means two or more, unless otherwise specifically specified.

[0041] In this application, unless otherwise specified or limited, terms such as "assembly" and "connection" should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection, electrical connection; direct connection, or indirect connection through an intermediate medium; internal communication between two components, or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in this application based on specific circumstances.

[0042] In addition, described feature, structure or characteristic can be combined in one or more embodiments in any suitable manner.In the following description, many specific details are provided so as to provide a full understanding of the embodiments of the present application. However, it will be appreciated by those skilled in the art that the technical scheme of the present application can be put into practice without one or more of the specific details, or other methods, components, devices, steps etc. can be adopted. In other cases, known methods, devices, implementations or operations are not shown or described in detail to avoid blurring the various aspects of the application.

[0043] Example 1

[0044] Figure 1 A schematic diagram showing the arrangement of the light-emitting structure and the dimming structure on the substrate is shown. Figure 2 A schematic cross-sectional structure diagram of a display panel is shown.

[0045] The first embodiment of the present application provides a display panel 100, which can be an OLED (organic light emitting diode) display. Figure 1 and Figure 2 As shown, the display panel 100 may include a base substrate 110, a pixel definition layer 120, a display light-emitting structure 130 and a dimming structure 140. The base substrate 110 has a display area and a non-display area. The non-display area can be arranged around the display area, wherein the pixel definition layer 120, the display light-emitting structure 130 and the dimming structure 140 can be arranged on the display area of ​​the base substrate 110.

[0046] It should be understood that see Figure 2 As shown, the display panel 100 may further include a driving circuit layer 150. This driving circuit layer 150 may be formed on the base substrate 110 before the pixel definition layer 120, the plurality of display light-emitting structures 130 and the dimming structure 140. This driving circuit layer 150 may include thin-film transistors, wiring and other circuit structures for driving the light-emitting diodes mentioned later to emit light, which will not be elaborated here.

[0047] For example, the base substrate 110 can be a rigid substrate made of glass, but is not limited to this. It can also be a flexible substrate made of materials such as polyimide (abbreviated as PI). In other words, the display panel 100 of the present application is not limited to being a rigid, non-bendable panel, but can also be a flexible, bendable panel.

[0048] See also Figure 2As shown, the pixel definition layer 120 may have a plurality of pixel openings (not shown) arranged at intervals and a pixel definition portion 121 located between adjacent pixel openings. In other words, the pixel definition layer 120 as a whole can be viewed as a grid-like hollow structure layer. The hollow regions are the pixel openings used to form pixels in this embodiment, while the non-hollow regions are the pixel definition portions 121 in this embodiment. It should be understood that the surface of the pixel definition portion 121 away from the base substrate 110 is flat. For example, the pixel definition layer 120 can be made of a material such as PI.

[0049] In the examples of this application, see Figure 2 As shown, the distance between adjacent pixel definition portions 121 gradually increases in the direction from the base substrate 110 to the pixel definition layer 120. For example, the cross section of the pixel definition portion 121 in the thickness direction of the base substrate 110 is a trapezoidal structure.

[0050] See also Figure 2 As shown, the display light emitting structure 130 may include a display light emitting diode 131 , and the display light emitting diode 131 includes a display anode 1310 , a display light emitting portion 1311 , and a display cathode 1312 , which are stacked in sequence.

[0051] It should be understood that the display anodes 1310 of each display light-emitting diode 131 in the display panel 100 are spaced apart from each other so that each display light-emitting diode 131 can be driven independently of each other, and the display cathodes 1312 of each display light-emitting diode 131 can be connected to each other to form an entire surface electrode to reduce processing costs.

[0052] Among them, see Figure 2 As shown, the display anode 1310 is formed between the base substrate 110 and the pixel definition layer 120. That is, in the process of manufacturing the display panel 100, the display anode 1310 is first formed on the base substrate 110, and then the pixel definition layer 120 is manufactured. The pixel definition portion 121 covers the edge area of ​​the display anode 1310. The edge area of ​​the display anode 1310 can be connected to structures such as the thin film transistor in the driving circuit layer 150, and the pixel opening exposes the middle area of ​​the display anode 1310. Part of the display light-emitting portion 1311 is located in the pixel opening and contacts the middle area of ​​the display anode 1310.

[0053] See also Figure 2As shown, the display light emitting part 1311 can be located in the pixel opening, and the other part is located on the side of the pixel defining part 121 away from the substrate 110, i.e. the top surface of the pixel defining part 121. That is, when manufacturing the display panel 100, the pixel defining layer 120 can be manufactured first, and then the display light emitting part 1311 is manufactured after the pixel defining layer 120 is manufactured, so that the display light emitting part 1311 is formed in the pixel opening and on the top surface of the pixel defining part 121. For example, the display light emitting part 1311 can be formed in the pixel opening and on the top surface of the pixel defining part 121 by evaporation or other methods.

[0054] It can be understood that the display light emitting part 1311 on the top surface of the pixel defining part 121 does not emit light.

[0055] In addition, the display light emitting part 1311 can include a hole injection layer, a hole transport layer, an organic light emitting material layer, an electron transport layer and an electron injection layer which are sequentially stacked, the hole injection layer is in contact with the display anode 1310, and the electron injection layer is in contact with the display cathode 1312, but is not limited thereto. The display light emitting part 1311 can only include a hole transport layer, a light emitting material layer and an electron transport layer, or other structures, which can be determined according to actual needs.

[0056] Referring to Figure 2 As shown, the display cathode 1312 can be formed after the display light emitting part 1311 is formed and is in contact with the display light emitting part 1311. The display cathode 1312 can include a low work function material layer containing Li, Ca, LiF / Ca, LiF / Al, Al, Mg, Ag, Pt, Pd, Ni, Au, Nd, Ir, Cr, BaF2, Ba, a compound thereof or a mixture thereof. For example, the display cathode 1312 can include a low work function material layer made of a mixture of Ag and Mg.

[0057] It should be understood that, referring to Figure 1 and Figure 2 As shown, the display light emitting structure 130 of the embodiment of the present application can be provided with a plurality of display light emitting diodes 131, and the display light emitting part 1311 of each display light emitting diode 131 is located in a pixel opening.

[0058] In the embodiment, referring to Figure 1 and Figure 2As shown, the plurality of display light emitting structures 130 in the display panel 100 can include multiple types, and the display light emitting parts 1311 of the display light emitting structures 130 of different types have different light emitting colors, such as red type display light emitting structure 130a, green type display light emitting structure 130b, and blue type display light emitting structure 130c, and the like. The red type display light emitting structure 130a refers to the display light emitting part 1311 having a red light emitting color, the green type display light emitting structure 130b refers to the display light emitting part 1311 having a green light emitting color, and the blue type display light emitting structure 130c refers to the display light emitting part 1311 having a blue light emitting color.

[0059] In this embodiment, the light adjusting structure 140 is arranged between adjacent display light emitting structures 130 and spaced apart from the display light emitting structure 130.

[0060] For example, referring to Figure 1 As shown, a light adjusting structure 140 is arranged between the red type display light emitting structure 130a and the green type display light emitting structure 130b, and another light adjusting structure 140 is arranged between the green type display light emitting structure 130b and the blue type display light emitting structure 130c. The two light adjusting structures 140 adjust adjacent display light emitting structures 130 to each other to achieve the functions of preventing peeping and improving display brightness.

[0061] Among them, the display light emitting structure 130 and the light adjusting structure 140 can be understood as a sub-pixel in the display panel 100, the red type display light emitting structure 130a, the green type display light emitting structure 130b, the two light adjusting structures 140, and the blue type display light emitting structure 130c can constitute a pixel unit, and the pixel arrangement mode in the pixel unit can be: red type display light emitting structure 130a, light adjusting structure 140, green type display light emitting structure 130b, light adjusting structure 140, blue type display light emitting structure 130c, as shown in Figure 1 .

[0062] For example, referring to Figure 2 As shown, the light adjusting structure 140 includes a light adjusting light emitting diode 141, which can include a light adjusting anode 1410, a light adjusting light emitting part 1411, and a light adjusting cathode 1412 stacked in sequence. Part of the light adjusting light emitting part 1411 can be formed on the surface of the pixel definition part 121 away from the substrate 110, and the other part can be formed in the pixel opening. It can be understood that when the display panel 100 is manufactured, the pixel definition layer 120 can be manufactured first, and then the light adjusting light emitting part 1411 is manufactured.

[0063] This dimming light-emitting portion 1411 can be arranged on the same layer as the display light-emitting portion 1311 of a type of display light-emitting structure 130. For example, when the display panel 100 includes a red type display light-emitting structure 130a, a green type display light-emitting structure 130b and a blue type display light-emitting structure 130c, this dimming light-emitting portion 1411 can be arranged on the same layer as the display light-emitting portion 1311 of the red type display light-emitting structure 130a. Based on this, the light-emitting color of the dimming light-emitting portion 1411 also corresponds to red; or, the dimming light-emitting portion 1411 can be arranged on the same layer as the display light-emitting portion 1311 of the green type display light-emitting structure 130b. Based on this, the light-emitting color of the dimming light-emitting portion 1411 also corresponds to green; or, the dimming light-emitting portion 1411 can be arranged on the same layer as the display light-emitting portion 1311 of the blue type display light-emitting structure 130c. Based on this, the light-emitting color of the dimming light-emitting portion 1411 also corresponds to blue.

[0064] In this embodiment, the dimming light-emitting portion 1411 is provided on the same layer as the display light-emitting portion 1311 of one type of display light-emitting structure 130 , which can reduce production costs.

[0065] It is understood that the color of light emitted by the dimming light-emitting portion 1411 is different from the color of light emitted by the adjacent display light-emitting portion 1311. For example, when the dimming structure 140 is located between the red-type display light-emitting structure 130a and the green-type display light-emitting structure 130b, the dimming light-emitting portion 1411 emits blue light; when the dimming structure 140 is located between the green-type display light-emitting structure 130b and the blue-type display light-emitting structure 130c, the dimming light-emitting portion 1411 emits red light. However, this is not limiting, and the dimming light-emitting portion 1411 may also emit other colors, such as yellow or white.

[0066] In this embodiment, see Figure 2 As shown, the dimming light emitting portion 1411 and the display light emitting portion 1311 can be spaced apart from each other, so as to avoid crosstalk between the dimming light emitting portion 1411 and the display light emitting portion 1311 .

[0067] It should be understood that see Figure 2 As shown, the dimming anode 1410 can be arranged in the same layer as the display anode 1310, and can be formed on the side of the driving circuit layer 150 away from the base substrate 110. The pixel definition portion 121 covers the edge area of ​​the dimming anode 1410. The edge area of ​​the dimming anode 1410 can be connected to the thin film transistor structure in the driving circuit layer 150 to transmit electrical signals to the dimming anode 1410, and the pixel opening exposes the middle area of ​​the dimming anode 1410. The part of the dimming light-emitting portion 1411 located in the pixel opening is in contact with the middle area of ​​the dimming anode 1410.

[0068] For example, the light-modulating anode 1410 may be a high work function material layer, and the high work function material layer may include indium tin oxide (ITO), indium zinc oxide (IZO), zinc oxide (ZnO), or indium oxide (In 2 O 3 ).

[0069] The dimming cathode 1412 can be formed on the surface of the dimming light-emitting portion 1411 away from the dimming anode 1410. That is, when manufacturing the display panel 100, the dimming light-emitting portion 1411 can be formed on the base substrate 110 first, and then the dimming cathode 1412 can be formed. This dimming cathode 1412 can be in contact with the surface of the dimming light-emitting portion 1411 away from the dimming anode 1410.

[0070] For example, the light-adjusting cathode 1412 may include a low work function material layer containing Li, Ca, LiF / Ca, LiF / Al, Al, Mg, Ag, Pt, Pd, Ni, Au, Nd, Ir, Cr, BaF2, Ba, their compounds or their mixtures. For example, the light-adjusting cathode 1412 may include a low work function material layer made of a mixture of Ag and Mg.

[0071] Among them, see Figure 2 As shown, the dimming cathode 1412 can be provided in the same layer as the display cathode 1312 and connected to form a surface electrode, which can reduce the processing difficulty and cost.

[0072] In this embodiment, see Figure 2 As shown, the dimming structure 140 also includes a shading portion 142, which can be located on the side of the dimming light-emitting diode 141 away from the base substrate 110, and the shading portion 142 is used to block the dimming light-emitting portion 1411 of the dimming light-emitting diode 141, that is, the orthographic projection of the dimming light-emitting portion 1411 on the base substrate 110 is located within the orthographic projection of the shading portion 142 on the base substrate 110, and the luminous color of the dimming light-emitting portion 1411 is different from the luminous color of the adjacent display light-emitting portion 1311.

[0073] The present application solution adds a dimming structure 140 to the display panel 100. The dimming structure 140 includes a dimming light-emitting diode 141 and a light-shielding portion 142. The light-shielding portion 142 blocks the dimming light-emitting portion 1411 of the dimming light-emitting diode 141. In this way, when the dimming light-emitting diode 141 and the display light-emitting diode 131 both emit light, due to the presence of the light-shielding portion 142, the light emitted by the dimming light-emitting diode 141 is blocked by the light-shielding portion 142 when viewed from a normal viewing angle, and only the light emitted by the display light-emitting diode 131 can be seen. That is, when viewed from a normal viewing angle, the dimming light-emitting diode 141 is not illuminated. The display screen you see is a normal display screen; when viewed at an oblique angle, you can see not only the light emitted by the display LED 131, but also the light emitted by the dimming LED 141. Since the color of the light emitted by the dimming LED 141 is different from the color of the light emitted by its adjacent display LED 131, the light emitted by the dimming LED 141 and the light emitted by its adjacent display LED 131 are mixed in color, resulting in a different color display, which interferes with information reading. In other words, the display screen viewed at an oblique angle is an anti-peeping screen.

[0074] The light shielding portion 142 may be a black matrix (BM), that is, made of black material to improve the shielding effect of the dimming LED 141 at a normal viewing angle, thereby ensuring a normal display image viewed at a normal viewing angle.

[0075] It is worth mentioning that the dimming anode 1410 can be disconnected from the display anode 1310, so that the dimming LED 141 and the display LED 131 can be controlled independently of each other, so that the display panel 100 can have a normal display mode and an anti-peeping display mode. The display panel 100 of this embodiment can realize one-button switchable anti-peeping mode.

[0076] For example, when the display panel 100 is in the normal display mode, the display LED 131 is controlled to emit light, and the dimming LED 141 is controlled not to emit light, so that the normal display image can be viewed at both the normal viewing angle and the oblique viewing angle; when the display panel 100 is switched from the normal display mode to the anti-peeping display mode, the display LED 131 and the dimming LED 141 can be controlled to emit light at the same time. Due to the presence of the light shielding portion 142, the light emitted by the dimming LED 141 is blocked by the light shielding portion 142 when viewed at the normal viewing angle, and only the light emitted by the display LED 131 can be seen. That is to say, the display screen viewed at a straight angle is a normal display screen; while when viewed at an oblique angle, not only the light emitted by the display LED 131 can be seen, but also the light emitted by the dimming LED 141. Since the color of the light emitted by the dimming LED 141 is different from the color of the light emitted by its adjacent display LED 131, the light emitted by the dimming LED 141 and the light emitted by its adjacent display LED 131 are mixed in color, resulting in a different color display, which interferes with information reading. In other words, the display screen viewed at an oblique angle is an anti-peeping screen.

[0077] Figure 3 A schematic cross-sectional view of the dimming structure is shown.

[0078] In this embodiment, see Figure 3 As shown, the display panel 100 further includes a first encapsulation layer 160, which is disposed on a side of the light shielding portion 142 close to the base substrate 110 and covers the display LED 131, the dimming LED 141, and the pixel definition layer 120. The first encapsulation layer 160 includes an adjustment region 161, within which a first inclined surface 162 is disposed. The inclination angle θ1 of the first inclined surface 162 is acute, i.e., the adjustment region 161 of the first encapsulation layer 160 has a slope, and this slope is acute.

[0079] In this embodiment, see Figure 3 As shown, the dimming light-emitting portion 1411 located at the edge of the pixel opening can emit light parallel to the inclination angle of the first inclined surface 162, that is, the dimming light-emitting portion 1411 can emit light parallel to the slope at a position close to the pixel definition portion 121. This light can form a light-emitting point A with the top surface of the first packaging layer 160, and the line between this light-emitting point A and the bottom edge position of the light-shielding portion 142 forms a first angle θ2 with the top surface of the first packaging layer 160.

[0080] Figure 4 The figure shows the light path diagram of the light modulating light emitting portion when the inclination angle of the first inclined surface is 30 degrees in the prior art. Figure 5 An experimental diagram of the light path emitted from the dimming light emitting portion when the inclination angle of the first inclined surface is 30° in the prior art is shown. Figure 6 The figure shows the light path diagram of the light modulating light emitting portion when the inclination angle of the first inclined surface is 45 degrees in the prior art. Figure 7 The figure shows an experimental diagram of the light path emitted by the light-modulating light-emitting portion when the inclination angle of the first inclined surface is 45 degrees in the prior art. Figure 8 The figure shows the light path diagram of the light modulating light emitting portion when the inclination angle of the first inclined surface is 60 degrees in the prior art. Figure 9 The figure shows an experimental diagram of the light path emitted by the light-modulating light-emitting portion when the inclination angle of the first inclined surface is 60 degrees in the prior art.

[0081] Due to the light-conducting effect of the first packaging layer 160, most of the light emitted by the dimming light-emitting portion 1411 will be emitted from a small viewing angle (display viewing angle), and since a shading portion 142 is provided above the small viewing angle (display viewing angle), most of the light from the dimming light-emitting portion 1411 is absorbed by the shading portion 142, and only a small amount of light is emitted from a large viewing angle (anti-peeping viewing angle) for anti-peeping, resulting in low brightness at the anti-peeping viewing angle, and thus causing the problem of poor anti-peeping effect.

[0082] Figure 4 、 Figure 6 and Figure 8 In the anti-privacy light area, the denser the hatching lines are, the more light that is emitted to prevent privacy, and vice versa. Figures 4 to 9 As shown in , it can be seen that when the inclination angle of the first inclined surface is 45°, more privacy light is emitted from the privacy light area than when the inclination angle is 30° or 60°. Furthermore, most of the dimming light emitted by the dimming light emitting portion 1411 is absorbed by the light shielding portion 142, leaving only a small amount of the dimming light to be emitted and mixed with the display light emitted by the adjacent display light emitting portion 1311. This results in a small amount of privacy light at the privacy viewing angle, leading to a poor privacy protection effect.

[0083] Therefore, the present application adjusts the light output at small viewing angles and large viewing angles (anti-peeping viewing angles) by adjusting the inclination angle θ1 of the first inclined surface 162 and adjusting the relationship between the first angle θ2 and the inclination angle θ1 of the first inclined surface 162 .

[0084] In this embodiment, the inclination angle θ1 of the first inclined surface 162 ranges from 35° to 50°, for example, 35°, 40°, 45°, and 50°, and the angle of the first angle θ2 is greater than or equal to the inclination angle θ1 of the first inclined surface 162, so as to reduce the light entering the light shielding portion 142 under a small viewing angle (display viewing angle) and increase the light emitted under a large viewing angle (anti-peeping viewing angle), thereby improving the anti-peeping effect under a large viewing angle (anti-peeping viewing angle). Figure 5 shown.

[0085] For example, the first angle θ2 may be 60°, 75°, 80°, etc.

[0086] In this embodiment, the slope of adjustment region 161 can be determined by the slope of pixel definition portion 121. Specifically, pixel definition portion 121 has a height of 2 μm and includes a second inclined surface. This means that pixel definition portion 121 also has a slope. The inclination angle of the second inclined surface of pixel definition portion 121 is the same as the inclination angle θ1 of first inclined surface 162. In other words, the slope of pixel definition portion 121 determines the slope of first encapsulation layer 160, which in turn determines the inclination angle θ1 of first inclined surface 162. By adjusting the height of pixel definition portion 121, light can be emitted from the space between pixel definition portion 121 and light shielding portion 142, ensuring the amount of light emitted and, in turn, maintaining the privacy protection effect.

[0087] Figure 10 A schematic diagram of the cross-sectional structure of the third inclined surface using an arc surface is shown.

[0088] Secondly, the light emitted by the dimming light-emitting portion 1411 is prone to light diffraction or light scattering at the edge of the shading portion 142, resulting in light emission at a small viewing angle (display viewing angle). At a small viewing angle (display viewing angle), the dimming light emitted by the dimming light-emitting portion 1411 will appear on the display, causing color interference to the normal reading at a small viewing angle (display viewing angle), thereby affecting the display effect at a small viewing angle (display viewing angle).

[0089] Therefore, see Figure 3 and Figure 10 As shown, the cross-sectional area of ​​the light shielding portion 142 is gradually increased in the direction from the base substrate 110 to the display light emitting portion 1311 to prevent the light emitted at the edge of the light shielding portion 142 from interfering with the display effect under a small viewing angle (display viewing angle).

[0090] In some embodiments of this application, see Figure 3 or Figure 10 As shown, the shading portion 142 has an upper surface 1420, a lower surface 1421 and a third inclined surface 1422 for connecting the upper surface 1420 and the lower surface 1421. The orthographic projection of the lower surface 1421 on the base substrate 110 is located within the orthographic projection of the upper surface 1420 on the base substrate 110, so that when light is diffracted or scattered at the edge position of the lower surface 1421 of the shading portion 142, the shading portion 142 on the upper surface 1420 can completely block and absorb the scattered light or diffracted light, avoid light emission at a small viewing angle (display viewing angle), ensure normal information reading at a small viewing angle (display viewing angle), and thus ensure the display effect.

[0091] Secondly, this third inclined surface 1422 forms a second angle θ3 with the extension line of the lower surface 1421, and the second angle θ3 is less than or equal to the first angle θ2, so as to ensure that the light under the optimal small viewing angle (display viewing angle) can be absorbed by the shading portion 142, avoiding affecting the information reading under the small viewing angle (display viewing angle), thereby ensuring the display effect.

[0092] It is worth mentioning that the second angle θ3 may be smaller than or equal to the inclination angle θ1 of the first inclined surface 162 . The second angle θ3 may be 25°, 30°, 45°, 50°, etc.

[0093] In addition, see Figure 3 As shown, the third inclined surface 1422 may be a plane. In this case, the cross section of the light shielding portion 142 in the thickness direction of the base substrate 110 is an inverted trapezoidal structure. Figure 10 As shown, the third inclined surface 1422 may also be an arc surface. When the third inclined surface 1422 is an arc surface, the second included angle θ3 may be formed by a connecting line between the edge of the upper surface 1420 and the edge of the lower surface 1421, and an extension line of the lower surface 1421. Of course, the third inclined surface 1422 may also have other shapes, as long as the light shielding portion 142 of the upper surface 1420 can block and absorb diffracted or scattered light.

[0094] In some embodiments of this application, see Figure 3 or Figure 10 As shown, the display panel 100 further includes a second encapsulation layer 170 and a third encapsulation layer 180. The first encapsulation layer 160 and the third encapsulation layer 180 may be inorganic encapsulation layers, and the second encapsulation layer 170 may be an organic encapsulation layer. The second encapsulation layer 170 is disposed on the side of the first encapsulation layer 160 away from the base substrate 110. The second encapsulation layer 170 performs a planarization function, that is, the entire surface of the second encapsulation layer 170 away from the base substrate 110 is flat. The third encapsulation layer 180 is disposed on the side of the second encapsulation layer 170 away from the first encapsulation layer 160. The light shielding portion 142 is provided on the side of the third encapsulation layer 180 away from the second encapsulation layer 170.

[0095] Figure 11 The cross-sectional structure diagram of the display panel further includes a touch electrode layer, a color resist layer and a planar layer.

[0096] In some embodiments of this application, see Figure 11 As shown, the display panel 100 further includes a touch electrode layer 190 , which is disposed on a side of the third packaging layer 180 away from the second packaging layer 170 , and the light shielding portion 142 is disposed above the touch electrode layer 190 , through which touch display can be achieved.

[0097] In some embodiments of this application, see Figure 11As shown, the display panel 100 further includes a color resist layer 1100 . The color resist layer 1100 is disposed on a side of the touch electrode layer 190 away from the base substrate 110 . The color resist layer 1100 includes a plurality of color resist units 1110 . Each color resist unit 1110 corresponds to a display light emitting diode 131 .

[0098] That is, see Figure 2 As shown, the display panel 100 adopts COE technology, that is, a color resist unit 1110 corresponding to the light emitting color is formed on the light emitting side of the display light emitting diode 131, the light shielding portion 142 and the color resist unit 1110 are located on the same layer, and the light shielding portion 142 is located between adjacent color resist units 1110, wherein the light shielding portion 142 can efficiently absorb all wavelengths of ambient light. The color resist unit 1110 may include R (red), G (green), and B (blue) color resist units 1110, which can ensure that 80% or even more of the display light emitted by the organic light emitting material layer is transmitted. While further purifying, it can also effectively absorb other wavelengths of light in the ambient light that are not the corresponding primary colors. In this way, the reflection of ambient light by the display panel 100 can be reduced without using a circular polarizer, so that the display has better contrast and more accurate and wider color expression.

[0099] It should be understood that a light-transmitting area is formed between the light-shielding portion 142 of the dimming structure 140 and the color-resistance unit 1110 of the adjacent display light-emitting structure 130, so as to allow the light of the dimming light-emitting portion 1411 blocked by it to be emitted into the external environment, and to cause light mixing with the light emitted by the adjacent display light-emitting diode 131, resulting in a different color display and interfering with information reading. In other words, the display screen viewed at an oblique angle is an anti-peeping screen.

[0100] In order to achieve privacy protection at different viewing angles, the size of the light-transmitting area between the light-shielding portion 142 and the color-resistance unit 1110 can be adjusted.

[0101] Further, see Figure 11 As shown, the display panel 100 further includes a color filter unit 1200, which is disposed between the light shielding portion 142 and the color resist unit 1110, that is, the color filter unit 1200 can be disposed between the aforementioned light-transmitting regions. The color filter unit 1200 is disposed around the light shielding portion 142 to ensure that the light emitted by the dimming light-emitting portion 1411 can completely pass through the color filter unit 1200 and then be emitted. The color filter unit 1200 can be disposed in the same layer as the color resist unit 1110 in the color resist layer 1100, that is, the color filter unit 1200 can be manufactured simultaneously with the color resist unit 1110, thereby reducing manufacturing costs.

[0102] It should be noted that the color of the color filter unit 1200 is the same as the color of the light emitted by the dimming light emitting unit 1411, so as to improve the purity of the light emitted by the dimming light emitting unit 1411, thereby improving the anti-peeping effect.

[0103] In addition, when preparing the color filter unit 1200 and the shading portion 142, the color filter unit 1200 can be prepared first, and then a bevel or curved surface can be opened at the edge of the color filter unit 1200, and then the shading portion 142 can be prepared to ensure a seamless connection between the shading portion 142 and the color filter unit 1200, which simplifies the preparation process and can also ensure that the light emitted by the dimming light-emitting portion 1411 can be completely emitted through the color filter unit 1200, thereby ensuring the purity of the light.

[0104] In this embodiment, see Figure 11 As shown, the display panel 100 further includes a planar layer 1300 , which is disposed on a side of the color resist layer 1100 away from the base substrate 110 and covers the color resist unit 1110 , the color filter unit 1200 and the light shielding portion 142 to provide a planar insulating effect.

[0105] Example 2

[0106] Figure 12 A schematic diagram showing the structure of the connection between the display panel and the driver chip is shown.

[0107] See also Figure 12 As shown, the second embodiment of the present application provides a display device 10 , which includes a driver chip 200 and the display panel 100 in the first embodiment. The display panel 100 is electrically connected to the driver chip 200 .

[0108] According to the embodiments of the present application, the specific type of the display device 10 is not particularly limited, and any type of display device 10 commonly used in the field can be used, such as display screens, mobile phones, laptop computers and other mobile devices, wearable devices such as watches, VR devices, etc. Those skilled in the art can make corresponding choices based on the specific purpose of the display device, which will not be repeated here.

[0109] In the description of this specification, the reference terms "some embodiments", "exemplarily", etc. mean that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art can combine and combine different embodiments or examples described in this specification and features of different embodiments or examples without contradiction.

[0110] Although the embodiments of the present application have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limitations on the present application. Ordinary technicians in this field can change, modify, replace and modify the above embodiments within the scope of the present application. Therefore, any changes or modifications made in accordance with the claims and description of the present application should fall within the scope of the patent application.

Claims

1. A display panel comprising a base substrate having a display area, wherein: The display panel further includes: a pixel definition layer, the pixel definition layer having a plurality of pixel openings spaced apart from each other and pixel definition portions located between adjacent pixel openings, wherein a distance between adjacent pixel definition portions gradually increases in a direction from the base substrate to the pixel definition layer; a plurality of display light emitting structures, each of the display light emitting structures comprising a display light emitting diode, the display light emitting diode comprising a display light emitting portion, at least a portion of each display light emitting portion being located within a pixel opening; a plurality of dimming structures, each of the dimming structures being provided between adjacent display light-emitting structures, the dimming structures comprising a dimming light-emitting diode and a light-shielding portion, the dimming light-emitting diode comprising a dimming light-emitting portion, at least a portion of which is located within one of the pixel openings, the light-shielding portion being located on a side of the dimming light-emitting diode away from the base substrate, the orthographic projection of the dimming light-emitting portion on the base substrate being located within the orthographic projection of the light-shielding portion on the base substrate, and the light-emitting color of the dimming light-emitting portion being different from the light-emitting color of the adjacent display light-emitting portion; a first encapsulation layer, disposed on a side of the light-shielding portion close to the base substrate, for covering the display LED, the dimming LED, and the pixel definition layer; the first encapsulation layer comprising an adjustment region, the orthographic projection of the adjustment region on the base substrate being within the orthographic projection of the light-shielding portion on the base substrate; and a first inclined surface having an inclination angle ranging from 35° to 50°; Among them, the dimming light-emitting portion located at the edge of the pixel opening emits light parallel to the inclination angle of the first inclined surface and forms a light-emitting point with the top surface of the adjustment area. The line connecting the light-emitting point and the bottom edge of the light-shielding portion forms a first angle with the top surface of the first packaging layer, and the first angle is greater than or equal to the inclination angle of the first inclined surface.

2. The display panel according to claim 1, wherein: The pixel defining portion has a second inclined surface, and an inclination angle of the second inclined surface is the same as an inclination angle of the first inclined surface.

3. The display panel according to claim 1 or 2, wherein: The height of the pixel definition portion is 2 um.

4. The display panel according to claim 1, wherein: The cross-sectional area of ​​the light shielding portion gradually increases in a direction from the base substrate to the display light emitting portion.

5. The display panel according to claim 4, wherein: The light shielding portion has a second angle, the second angle is smaller than or equal to the first angle, and the second angle is smaller than or equal to the inclination angle of the first inclined surface.

6. The display panel according to claim 1, wherein: The display panel further includes a second encapsulation layer and a third encapsulation layer stacked in sequence, the third encapsulation layer is arranged on a side of the second encapsulation layer away from the first encapsulation layer, and the light shielding portion is arranged on a side of the third encapsulation layer away from the base substrate.

7. The display panel according to claim 6, wherein: The display panel further includes a touch electrode layer, which is disposed on a side of the third encapsulation layer away from the second encapsulation layer. The light shielding portion is disposed on a side of the touch electrode layer away from the third encapsulation layer.

8. The display panel according to claim 7, wherein: The display panel further includes a color resist layer, which is disposed on a side of the touch electrode layer away from the base substrate. The color resist layer includes a plurality of color resist units, each of which corresponds to one of the display light emitting diodes.

9. The display panel according to claim 8, wherein: The display panel further includes a color filter unit on the same layer as the color resist unit. The color filter unit is provided between the light shielding portion and the color resist unit, and the color of the color filter unit is the same as the color of the light emitted by the dimming light emitting portion.

10. A display device, characterized in that: include: Driver chip; The display panel according to any one of claims 1 to 9, wherein the display panel is electrically connected to the driver chip.

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