Display panel and display device

Abstract

The invention relates to a display panel and a display device. The display panel comprises a substrate, a planarization layer, a light-emitting device layer and a packaging structure. The planarization layer is located on one side of the substrate; the light-emitting device layer is located on the side, away from the substrate, of the planarization layer and comprises a first light-emitting device and a second light-emitting device. The light wavelength of the first light-emitting device is smaller than that of the second light-emitting device; the packaging structure is located on the side, away from the substrate, of the light-emitting device layer and comprises a first inorganic layer, an organic layer and a second inorganic layer which are stacked in the direction away from the substrate. A first protrusion is arranged on the side, away from the substrate, of the planarization layer, and the first light-emitting device is located on the side, away from the substrate, of the first protrusion. In the thickness direction of the substrate, the distance between the first light-emitting device and the second inorganic layer is smaller than the distance between the second light-emitting device and the second inorganic layer. The anti-peeping performance can be guaranteed, and meanwhile the problems that the thickness of a screen body is increased, attaching is not firm and blistering is likely to happen due to the fact that an anti-peeping film is attached are solved.

Description

Technical Field

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

[0002] With the continuous advancement of automotive technology, vehicle interior display systems are also constantly being upgraded. In recent years, large screen designs and integrated displays between the driver and passenger seats have become a popular trend in vehicle interiors. While this design provides a rich entertainment experience for the passenger seat, it also brings new challenges: the driver can be easily distracted by the content on the passenger seat's screen while driving, thus compromising driving safety.

[0003] To address these issues, a common technique currently involves applying a privacy film to the passenger seat screen. However, applying the privacy film to the module after production not only increases production costs but also increases screen thickness. Furthermore, the additional film layer reduces the screen's transmittance, thereby impacting display quality. Furthermore, this post-application method can also lead to issues such as loose adhesion and bubbling in actual use, further impacting user experience and product reliability.

[0004] Therefore, how to effectively prevent the main driver from being disturbed by the co-pilot's screen without affecting the co-pilot's entertainment function, while overcoming the defects of the above-mentioned anti-peeping technology, has become a technical problem that R&D personnel urgently need to solve. Summary of the Invention

[0005] Based on this, it is necessary to provide a display panel and a display device, aiming to ensure anti-peeping performance while overcoming the problems of increased screen thickness, loose fitting, and easy bubbling caused by attaching an anti-peep film.

[0006] In a first aspect, embodiments of the present application provide a display panel comprising: a substrate, a planarization layer, a light-emitting device layer, and an encapsulation structure. The planarization layer is located on one side of the substrate; the light-emitting device layer is located on a side of the planarization layer away from the substrate and comprises a first light-emitting device and a second light-emitting device; the wavelength of light from the first light-emitting device is smaller than the wavelength of light from the second light-emitting device; the encapsulation structure is located on a side of the light-emitting device layer away from the substrate and comprises a first inorganic layer, an organic layer, and a second inorganic layer stacked in a direction away from the substrate;

[0007] In which, a first protrusion is provided on the side of the planarization layer away from the substrate, and the first light-emitting device is located on the side of the first protrusion away from the substrate; along the thickness direction of the substrate, the distance between the first light-emitting device and the second inorganic layer is smaller than the distance between the second light-emitting device and the second inorganic layer.

[0008] In a second aspect, embodiments of the present application provide a display device comprising a display panel, the display panel comprising: a substrate, a planarization layer, a light-emitting device layer, and an encapsulation structure. The planarization layer is located on one side of the substrate; the light-emitting device layer is located on a side of the planarization layer away from the substrate and comprises a first light-emitting device and a second light-emitting device; the wavelength of light from the first light-emitting device is smaller than the wavelength of light from the second light-emitting device; the encapsulation structure is located on a side of the light-emitting device layer away from the substrate and comprises a first inorganic layer, an organic layer, and a second inorganic layer stacked in a direction away from the substrate;

[0009] In which, a first protrusion is provided on the side of the planarization layer away from the substrate, and the first light-emitting device is located on the side of the first protrusion away from the substrate; along the thickness direction of the substrate, the distance between the first light-emitting device and the second inorganic layer is smaller than the distance between the second light-emitting device and the second inorganic layer.

[0010] The display panel and display device described above utilize a first protrusion provided on the planarization layer, and a first light-emitting device (emitting light of a shorter wavelength) disposed on the first protrusion. This allows the distance between the first light-emitting device and the second inorganic layer of the encapsulation structure to be smaller than the distance between the second light-emitting device and the second inorganic layer of the encapsulation structure. This arrangement allows the cavity length (i.e., the distance between the first light-emitting device and the second inorganic layer) of the first light-emitting device to be adjusted, such that the cavity length (the distance between the first light-emitting device and the second inorganic layer) of the light-emitting device with a shorter wavelength is smaller. This allows both light-emitting devices of different colors to be matched to the appropriate cavity length, resulting in the best enhancement effect for both light-emitting devices at normal viewing angles. Furthermore, while achieving the same brightness at normal viewing angles, the current of the light-emitting device in the embodiment of the present application can be set lower. This lower current results in lower brightness at wide viewing angles, thereby achieving a privacy-preventing effect at wide viewing angles. Furthermore, this arrangement eliminates the need for an additional privacy film, thus avoiding the issues of increased screen thickness, loose adhesion, and blistering associated with external privacy films. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] In order to more clearly illustrate the technical solutions in the embodiments or exemplary embodiments of the present application, the drawings required for use in the description of the embodiments or exemplary embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0012] Figure 1 A schematic plan view of a light-emitting device layer of a display panel provided in one embodiment of the present application.

[0013] Figure 2 for Figure 1 A schematic diagram of a partial cross-sectional structure of the AA section of the display panel is shown.

[0014] Figure 3 for Figure 1 Schematic diagram of the light-emitting principle of the display panel shown.

[0015] Figure 4 for Figure 1 A schematic diagram of a partial cross-sectional structure of the BB section of the display panel is shown.

[0016] Figure 5 for Figure 2 and Figure 3 A schematic plan view of a pixel defining layer of a display panel is shown.

[0017] Figure 6 for Figure 1 Another partial cross-sectional structural diagram of the AA section of the display panel is shown.

[0018] Figure 7 for Figure 1 Another partial cross-sectional structural diagram of the BB section of the display panel is shown.

[0019] Figure 8 for Figure 6 and Figure 7 A schematic plan view of a pixel defining layer of a display panel is shown.

[0020] Figure 9 for Figure 1 Another partial cross-sectional structural diagram of the AA section of the display panel is shown.

[0021] Figure 10 for Figure 1 Another partial cross-sectional structural diagram of the BB section of the display panel is shown.

[0022] Reference numerals:

[0023] 10. Display panel; 11. Substrate; 12. Planarization layer; 121. First protrusion; 122. Second protrusion; 13. Light-emitting device layer; 131. First light-emitting device; 132. Second light-emitting device; 133. Third light-emitting device; 14. Encapsulation structure; 141. First inorganic layer; 142. Organic layer; 143. Second inorganic layer; 15. Pixel defining layer; 15a. First pixel opening; 15b. Second pixel opening; 15c. Third pixel opening; 151. First defining portion; 152. Second defining portion; 153. Third defining portion; 16. Light-blocking layer; 16a. First light-transmitting hole; 16b. Second light-transmitting hole; 16c. Third light-transmitting hole; 17. Lens layer; 17a. First lens portion; 17b. Second lens portion; 17c. Third lens portion. DETAILED DESCRIPTION

[0024] To facilitate understanding of the present application, the present application will be described more fully below with reference to the accompanying drawings. The accompanying drawings illustrate preferred embodiments of the present application. However, the present application may be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to provide a more thorough and comprehensive understanding of the disclosure of the present application.

[0025] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art to which this application belongs. The terms used herein in the specification of this application are for the purpose of describing specific embodiments only and are not intended to limit this application. The term "and / or" as used herein includes any and all combinations of one or more of the relevant listed items.

[0026] When describing positional relationships, unless otherwise specified, when an element, such as a layer, film, or substrate, is referred to as being "on" another element, it can be directly on the other element or intervening elements may be present. Furthermore, when a layer is referred to as being "under" another layer, it can be directly below or one or more light-emitting units may be present. It is also understood that when a layer is referred to as being "between" two layers, it can be the only layer between the two layers or one or more light-emitting units may be present.

[0027] In the case of using “including,” “having,” and “comprising” described herein, another component may be added unless a clear limiting term such as “only,” “consisting of,” etc. is used. Unless mentioned otherwise, a term in the singular form may include a plural form and should not be understood as having one number.

[0028] It should be understood that although the terms "first," "second," etc. may be used herein to describe various elements, these elements should not be limited by these terms. These terms are only used to distinguish one element from another. For example, a first element may be referred to as a second element, and similarly, a second element may be referred to as a first element, without departing from the scope of this application.

[0029] It should also be understood that when interpreting an element, even if not explicitly described, the element is interpreted as including a range of error, which should be within the acceptable deviation range of the specific value determined by those skilled in the art. For example, "approximately," "approximately," or "substantially" can mean within one or more standard deviations, and is not limited here.

[0030] Furthermore, in the specification, the phrase “planar distribution diagram” refers to a drawing when the target portion is viewed from above, and the phrase “cross-sectional diagram” refers to a drawing when a section taken by vertically cutting the target portion is viewed from the side.

[0031] In addition, the drawings are not drawn to a 1:1 scale, and the relative sizes of the elements in the drawings are drawn only as examples and not necessarily according to the true scale.

[0032] As described in the background technology, in vehicle display technology, the currently commonly used anti-peeping technology is to attach an anti-peeping film to the surface of the co-pilot screen. However, attaching an anti-peeping film not only increases production costs, but also increases the thickness of the screen. Secondly, the additional film layer will reduce the transmittance of the screen, thereby affecting the display effect. In addition, this post-attachment method may also face problems such as loose fitting and easy bubbling in actual applications, further affecting the user experience and product reliability. Therefore, how to overcome the problems of increased screen thickness, loose fitting, and easy bubbling caused by attaching an anti-peeping film while ensuring anti-peeping performance.

[0033] In light of this, embodiments of the present application provide a display panel and display device. By providing a first protrusion on a planarization layer, a first light-emitting device (emitting light of a shorter wavelength) is positioned on the first protrusion. This allows the distance between the first light-emitting device and the second inorganic layer of the encapsulation structure to be smaller than the distance between the second light-emitting device and the second inorganic layer of the encapsulation structure. This arrangement allows the cavity length (i.e., the distance between the first light-emitting device and the second inorganic layer) of the first light-emitting device to be adjusted, such that the cavity length (the distance between the second inorganic layer and the light-emitting device with a shorter wavelength) is smaller. This allows both light-emitting devices of different colors to be matched to the appropriate cavity length, maximizing the enhancement effect at normal viewing angles for both colors. Furthermore, while achieving the same brightness at normal viewing angles, the current of the light-emitting devices in embodiments of the present application can be set lower. This lower current results in lower brightness at wide viewing angles, thereby achieving a privacy-preventing effect at wide viewing angles. Furthermore, this arrangement eliminates the need for a separate privacy film, thus avoiding the issues of increased screen thickness, loose adhesion, and blistering associated with external privacy films.

[0034] Specifically, refer to Figure 1 and Figure 2As shown, in a first aspect, embodiments of the present application provide a display panel 10, comprising: a substrate 11, a planarization layer 12, a light-emitting device layer 13, and an encapsulation structure 14. The planarization layer 12 is located on one side of the substrate 11; the light-emitting device layer 13 is located on a side of the planarization layer 12 away from the substrate 11 and includes a first light-emitting device 131 and a second light-emitting device 132; the wavelength of light emitted by the first light-emitting device 131 is shorter than that of light emitted by the second light-emitting device 132. The encapsulation structure 14 is located on a side of the light-emitting device layer 13 away from the substrate 11 and includes a first inorganic layer 141, an organic layer 142, and a second inorganic layer 143 stacked in a direction away from the substrate 11.

[0035] A first protrusion 121 is provided on the side of the planarization layer 12 facing away from the substrate 11, and the first light-emitting device 131 is located on the side of the first protrusion 121 facing away from the substrate 11. Along the thickness of the substrate 11, the distance between the first light-emitting device 131 and the second inorganic layer 143 is less than the distance between the second light-emitting device 132 and the second inorganic layer 143. It should be noted that the planarization layer 12 in this embodiment is made of the same material as the planarization layer 12 in conventional technology. The difference lies in that a protrusion structure (such as the first protrusion 121) is provided on the surface of the planarization layer 12 in this embodiment to raise the height of the first light-emitting device 131. It is understood that the protrusion structure and the planarization layer 12 can be integrally formed.

[0036] It can be understood that the first light emitting device 131 and the second light emitting device 132 both include a stacked anode, a light emitting structure, and a cathode. The distance between the first light emitting device 131 and the second inorganic layer 143 is the distance between the cathode of the first light emitting device 131 and the second inorganic layer 143. The distance between the second light emitting device 132 and the second inorganic layer 143 is the distance between the cathode of the second light emitting device 132 and the second inorganic layer 143. Figure 2 In the embodiment, the distance between the first light emitting device 131 and the second inorganic layer 143 is L1, and the distance between the second light emitting device 132 and the second inorganic layer 143 is L2.

[0037] It should be noted that the first light-emitting device 131 and the second light-emitting device 132 can be any of red, blue, and green light-emitting devices. In one example, the first light-emitting device 131 is a blue light-emitting device and the second light-emitting device 132 is a red light-emitting device. In another example, the first light-emitting device 131 is a blue light-emitting device and the second light-emitting device 132 is a green light-emitting device. In yet another example, the first light-emitting device 131 is a green light-emitting device and the second light-emitting device 132 is a red light-emitting device.

[0038] According to the Fabry-Perot interference formula, the cavity length L of the normal viewing angle light satisfies the following formula: 2nLcos(θ)=mλ, then the normal viewing angle light is the strongest, where m is a positive integer, λ is the wavelength of the light, and n is the refractive index. Figure 3 As shown, the positive viewing angle cavity length L11 satisfies m is an integer, and the light at the positive viewing angle is the strongest. The large viewing angle cavity length L12 does not satisfy m is an integer, and the large viewing angle light is weakened.

[0039] In this embodiment, by providing a first protrusion 121 on the planarization layer 12, a first light-emitting device 131 (emitting light with a shorter wavelength) is positioned on the first protrusion 121. This allows the distance between the first light-emitting device 131 and the second inorganic layer 143 of the encapsulation structure 14 to be smaller than the distance between the second light-emitting device 132 and the second inorganic layer 143 of the encapsulation structure 14. Thus, by providing the first protrusion 121, the cavity length of the first light-emitting device 131 (i.e., the distance between the first light-emitting device 131 and the second inorganic layer 143) can be adjusted, so that the cavity length (the distance between the light-emitting device and the second inorganic layer 143) of the light-emitting device with a shorter wavelength is smaller. This allows both light-emitting devices of different colors to be matched to the appropriate cavity length (satisfying the aforementioned interference equation), achieving the best enhancement effect for both light-emitting devices at normal viewing angles. Furthermore, while achieving the same brightness at normal viewing angles, the current of the light-emitting devices in this embodiment can be set lower. At lower currents, the brightness at wide viewing angles is lower, thus achieving a privacy-preventing effect at wide viewing angles. For example, based on a brightness of 800° at a normal viewing angle, conventional technology requires a current of A, and the brightness at a wide viewing angle is 0.6*A. This application requires a current of B (smaller than A), and the brightness at a wide viewing angle is 0.6*B, where (0.6*B) < (0.6*A). Furthermore, the privacy feature is implemented within the display panel 10, eliminating the need for a separate privacy film. This avoids issues such as increased screen thickness, loose adhesion, and blistering caused by external privacy films.

[0040] In one embodiment, the display panel 10 further includes a pixel defining layer 15 located on the side of the planarization layer 12 away from the substrate 11, and a first pixel opening 15a and a second pixel opening 15b are provided on the pixel defining layer 15. The first light-emitting device 131 is located at the first pixel opening 15a, and the second light-emitting device 132 is located at the second pixel opening 15b.

[0041] Among them, the pixel defining layer 15 includes a first defining portion 151 and a second defining portion 152. The first defining portion 151 surrounds at least a portion of the outer periphery of the first pixel opening 15a, and the second defining portion 152 surrounds at least a portion of the outer periphery of the second pixel opening 15b. Here, the first defining portion 151 surrounds at least a portion of the outer periphery of the first pixel opening 15a, and at least a portion of the side wall of the first pixel opening 15a is located on the first defining portion 151; the second defining portion 152 surrounds at least a portion of the outer periphery of the second pixel opening 15b, and at least a portion of the side wall of the second pixel opening 15b is located on the second defining portion 152. Along the thickness direction of the substrate 11, the distance between the first defining portion 151 and the second inorganic layer 143 is smaller than the distance between the second defining portion 152 and the second inorganic layer 143. Figure 2 In the embodiment, the distance between the first defining portion 151 and the second inorganic layer 143 is S1, and the distance between the second defining portion 152 and the second inorganic layer 143 is S2.

[0042] The above arrangement results in a difference in height between the first defining portion 151 and the second defining portion 152. This causes the reflection paths of the wide-angle light from the first light-emitting device 131 and the second light-emitting device 132 within the microcavity to vary, further weakening the wide-angle light from the first light-emitting device 131 and the second light-emitting device 132. It is also understood that the difference in reflection paths within the microcavity between the wide-angle light from the first light-emitting device 131 and the emission paths within the microcavity between the wide-angle light from the second light-emitting device 132 weakens the light mixing effect of the two colors of wide-angle light, thereby weakening the display effect at a wide viewing angle.

[0043] In one embodiment, referring to Figure 2 and Figure 5 As shown, the first defining portion 151 surrounds the entire periphery of the first pixel opening 15a, and the second defining portion 152 surrounds a portion of the periphery of the second pixel opening 15b. In other words, the entire sidewall of the first pixel opening 15a is located on the first defining portion 151, and a portion of the sidewall of the second pixel opening 15b is located on the second defining portion 152. This helps to change the reflection path of the wide-angle light of the second light-emitting device 132 in the microcavity, thereby weakening the wide-angle light of the second light-emitting device 132.

[0044] In one embodiment, Figure 2 and Figure 5As shown, the first pixel opening 15a is arranged adjacent to the second pixel opening 15b, and the first limiting portion 151 outside the first pixel opening 15a also surrounds part of the outer periphery of the second pixel opening 15b. In other words, part of the sidewall of the second pixel opening 15b is located on the first limiting portion 151 adjacent to the second pixel opening 15b. In this way, the reflection path of the large-viewing angle light on the left side of the second light-emitting device 132 and the reflection path of the large-viewing angle light on the right side of the microcavity are different, so that the large-viewing angle anti-peeping effect on the left side of the second light-emitting device 132 is different from the large-viewing angle anti-peeping effect on the right side of the second light-emitting device 132, thereby achieving a selective unilateral anti-peeping effect. In addition, this arrangement is conducive to reducing the gap between the first pixel opening 15a and the second pixel opening 15b, which is conducive to improving the PPI.

[0045] In one embodiment, the light-emitting device layer 13 further includes a third light-emitting device 133. The wavelength of light emitted by the third light-emitting device 133 is greater than the wavelength of light emitted by the first light-emitting device 131 and smaller than the wavelength of light emitted by the second light-emitting device 132. Specifically, the first light-emitting device 131 is a blue light-emitting device, the second light-emitting device 132 is a red light-emitting device, and the third light-emitting device 133 is a green light-emitting device.

[0046] Further, if Figure 4 As shown, the second protrusion 122 is provided on the side of the planarization layer 12 away from the substrate 11, and the third light-emitting device 133 is located on the side of the second protrusion 122 away from the substrate 11; along the thickness direction of the substrate 11, the distance between the second protrusion 122 and the second inorganic layer 143 is greater than the distance between the first protrusion 121 and the second inorganic layer 143; in other words, with reference to Figure 2 and Figure 4 As shown, the protrusion height of the first protrusion 121 is H1, and the protrusion height of the second protrusion 122 is H2, where H1>H2. The distance between the third light-emitting device 133 and the second inorganic layer 143 is greater than the distance between the first light-emitting device 131 and the second inorganic layer 143, and less than the distance between the second light-emitting device 132 and the second inorganic layer 143. The distance between the third light-emitting device 133 and the second inorganic layer 143 is L3, the distance between the first light-emitting device 131 and the second inorganic layer 143 is L1, and the distance between the second light-emitting device 132 and the second inorganic layer 143 is L2. It will be understood that the third light-emitting device 133 also includes a stacked anode, a light-emitting structure, and a cathode, and L3 is the distance between the cathode of the third light-emitting device 133 and the second inorganic layer 143.

[0047] Thus, by providing the first protrusion 121 and the second protrusion 122, the cavity length of the first light-emitting device 131 (i.e., the distance between the first light-emitting device 131 and the second inorganic layer 143) and the cavity length of the third light-emitting device 133 (i.e., the distance between the third light-emitting device 133 and the second inorganic layer 143) can be adjusted, so that the cavity length (the distance between the third light-emitting device 133 and the second inorganic layer 143) of the light-emitting device with a shorter wavelength is smaller. In this way, the light-emitting devices of each color can be matched with the appropriate cavity length (satisfying the above-mentioned interference formula), and the enhancement effect of the light-emitting devices of each color at a normal viewing angle is optimized. Furthermore, while achieving the same luminance at a normal viewing angle, the current of the light-emitting device in the embodiment of the present application can be set lower. In this way, at a lower current, the brightness at a wide viewing angle is relatively weak, thereby achieving an anti-peeping effect at a wide viewing angle. For example: taking the brightness at a positive viewing angle of 800 as the benchmark, the traditional technology requires a current of A, and the brightness at a large viewing angle is 0.6*A. This application requires a current of B (less than A), and the brightness at a large viewing angle is 0.6*B, (0.6*B)<(0.6*A).

[0048] In one embodiment, H1 is greater than 1 μm and H2 is greater than 1 μm. This is beneficial for adjusting the length of the microcavity.

[0049] In one embodiment, Figure 4 As shown, a third pixel opening 15c is provided on the pixel defining layer 15, and the third light emitting device 133 is provided at the third pixel opening 15c. The pixel defining layer 15 also includes a third defining portion 153, which surrounds at least part of the periphery of the third pixel opening 15c. In other words, at least part of the sidewall of the third pixel opening 15c is located on the third defining portion 153; the distance between the third defining portion 153 and the second inorganic layer 143 is smaller than the distance between the second defining portion 152 and the second inorganic layer 143, and is larger than the distance between the first defining portion 151 and the second inorganic layer 143. Figure 4 In the embodiment, the distance between the third defining portion 153 and the second inorganic layer 143 is S3.

[0050] The above arrangement results in different heights for the first defining portion 151, the second defining portion 152, and the third defining portion 153. This results in different reflection paths within the microcavity for the wide-angle light from the first light-emitting device 131, the second light-emitting device 132, and the third light-emitting device 133, further weakening the wide-angle light from the first light-emitting device 131, the second light-emitting device 132, and the third light-emitting device 133. It is also understood that the different reflection paths within the microcavity for the wide-angle light from the three light-emitting devices weaken the light mixing effect of the three colors of wide-angle light, thereby weakening the display effect at a wide viewing angle.

[0051] In one embodiment, the third limiting portion 153 surrounds the entire periphery of the third pixel opening 15c. This helps to keep the light around the third light-emitting device 133 consistent at a wide viewing angle. In this way, the anti-peeping effect is relatively consistent when observing the third light-emitting device 133 from four sides at a wide viewing angle.

[0052] In one embodiment, the third defining portion 153 surrounds a portion of the periphery of the third pixel opening 15c. This creates a difference in the wide-angle light beams around the third light-emitting device 133, facilitating selective privacy protection. For example, the wide-angle privacy protection effect on the left side of the third light-emitting device 133 can be stronger than that on the right side.

[0053] In one embodiment, Figure 4 and Figure 5 As shown, the first pixel opening 15a and the third pixel opening 15c are disposed adjacent to each other, and the first defining portion 151 surrounding the first pixel opening 15a also surrounds a portion of the third pixel opening 15c. Specifically, the first defining portion 151 surrounds the entire periphery of the first pixel opening 15a, and the first defining portion 151 also surrounds a portion of the third pixel opening 15c.

[0054] In this way, the reflection path of the wide-angle light on the left side of the third light-emitting device 133 in the microcavity is different from the reflection path of the wide-angle light on the right side of the microcavity. This makes the wide-angle privacy protection effect on the left side of the third light-emitting device 133 different from the wide-angle privacy protection effect on the right side of the third light-emitting device 133, thereby achieving a selective single-sided privacy protection effect. In addition, this arrangement helps to reduce the gap between the first pixel opening 15a and the third pixel opening 15c, thereby improving the PPI.

[0055] In one embodiment, Figure 6 and Figure 8 As shown, the first defining portion 151 surrounds the entire periphery of the first pixel opening 15a, and the second defining portion 152 surrounds the entire periphery of the second pixel opening 15b. This helps ensure consistent light across a wide viewing angle around the first and second light-emitting devices 131, 132. Thus, at a wide viewing angle, the privacy protection effect is relatively consistent when observing the first and second light-emitting devices 131, 132 from all four sides.

[0056] Furthermore, the third limiting portion 153 surrounds the entire periphery of the third pixel opening 15c, which helps to keep the wide-angle light around the third light-emitting device 133 consistent. In this way, under a wide angle, when observing the third light-emitting device 133 from four sides, the anti-peeping effect is relatively consistent.

[0057] In one embodiment, the display panel 10 further includes a light-blocking layer 16 disposed on a side of the pixel-defining layer 15 away from the substrate 11. Exemplarily, the light-blocking layer 16 may be a black matrix (BM). The light-blocking layer 16 is provided with a first light-transmitting hole 16a, a second light-transmitting hole 16b, and a third light-transmitting hole 16c. The first light-transmitting hole 16a communicates with the first pixel opening 15a, the second light-transmitting hole 16b communicates with the second pixel opening 15b, and the third light-transmitting hole 16c communicates with the third pixel opening 15c. The orthographic projection of the light-blocking layer 16 on the substrate 11 is within the orthographic projection of the pixel-defining layer 15 on the substrate 11.

[0058] By providing the light-blocking layer 16, the wide-angle light of the first light-emitting device 131, the second light-emitting device 132, and the third light-emitting device 133 can be blocked, thereby achieving the purpose of anti-peeping. It is understandable that further providing the light-blocking layer 16 can further improve the anti-peeping performance.

[0059] It should be noted that the light blocking layer 16 on the first defining portion 151 has the highest height, the light blocking layer 16 on the third defining portion 153 has the second highest height, and the light blocking layer 16 on the second defining portion 152 has the lowest height.

[0060] In one embodiment, the display panel 10 further includes a lens layer 17 located on a side of the encapsulation structure 14 away from the substrate 11; the lens layer 17 includes a first lens portion 17a, a second lens portion 17b, and a third lens portion 17c, wherein the orthographic projection of the first lens portion 17a on the substrate 11 covers the orthographic projection of the first light-emitting device 131 on the substrate 11, the orthographic projection of the second lens portion 17b on the substrate 11 covers the orthographic projection of the second light-emitting device 132 on the substrate 11, and the orthographic projection of the third lens portion 17c on the substrate 11 covers the orthographic projection of the third light-emitting device 133 on the substrate 11.

[0061] By providing the first lens portion 17a, the second lens portion 17b, and the third lens portion 17c, the luminous intensity of the first light-emitting device 131, the second light-emitting device 132, and the third light-emitting device 133 at a normal viewing angle can be further increased, so that the current of the light-emitting device can be set lower. In this way, at a lower current, the brightness at a wide viewing angle is relatively weak, thereby achieving an anti-peeping effect at a wide viewing angle.

[0062] In a second aspect, embodiments of the present application provide a display device, comprising a display panel 10, comprising a substrate 11, a planarization layer 12, a light-emitting device layer 13, and an encapsulation structure 14. The planarization layer 12 is located on one side of the substrate 11; the light-emitting device layer 13 is located on a side of the planarization layer 12 away from the substrate 11, and comprises a first light-emitting device 131 and a second light-emitting device 132; the wavelength of light emitted by the first light-emitting device 131 is smaller than the wavelength of light emitted by the second light-emitting device 132; the encapsulation structure 14 is located on a side of the light-emitting device layer 13 away from the substrate 11, and comprises a first inorganic layer 141, an organic layer 142, and a second inorganic layer 143 stacked in a direction away from the substrate 11.

[0063] In which, a first protrusion 121 is provided on the side of the planarization layer 12 away from the substrate 11, and the first light-emitting device 131 is located on the side of the first protrusion 121 away from the substrate 11; along the thickness direction of the substrate 11, the distance between the first light-emitting device 131 and the second inorganic layer 143 is smaller than the distance between the second light-emitting device 132 and the second inorganic layer 143.

[0064] The display device described above provides a first protrusion 121 on the planarization layer 12, and positions a first light-emitting device 131, which emits light of a shorter wavelength, on the first protrusion 121. This allows the distance between the first light-emitting device 131 and the second inorganic layer 143 of the encapsulation structure 14 to be smaller than the distance between the second light-emitting device 132 and the second inorganic layer 143 of the encapsulation structure 14. Thus, by providing the first protrusion 121, the cavity length of the first light-emitting device 131 (i.e., the distance between the first light-emitting device 131 and the second inorganic layer 143) can be adjusted, so that the cavity length (the distance between the light-emitting device and the second inorganic layer 143) of the light-emitting device with a shorter wavelength is smaller. This allows both light-emitting devices of different colors to be matched to the appropriate cavity length, achieving the best enhancement effect for both light-emitting devices at normal viewing angles. Furthermore, while achieving the same brightness at normal viewing angles, the current of the light-emitting device in the embodiment of the present application can be set lower. Thus, at lower currents, the brightness at wide viewing angles is lower, thereby achieving a privacy-preventing effect at wide viewing angles. In addition, this setting does not require the additional attachment of an anti-peep film, thus avoiding the problems of increased screen thickness, loose fit, and easy bubbling caused by external anti-peep film.

[0065] It should be noted that the display panel 10 of the display device in this embodiment can be the same as the display panel 10 in any embodiment of the first aspect, and the embodiments of this application will not be repeated here.

[0066] It will be understood that the display device in the embodiments of the present application can be a laptop computer, a mobile phone, a wireless device, a personal digital assistant (PDA), a handheld or portable computer, a GPS receiver / navigator, a camera, an MP4 video player, a camcorder, a game console, a watch, a clock, a calculator, a television monitor, a flat-panel display, a computer monitor, a car display (e.g., an odometer display, etc.), a navigator, a cockpit controller and / or display, a display of a camera view (e.g., a display of a rearview camera in a vehicle), an electronic photo, an electronic billboard or sign, a projector, etc.

[0067] The technical features of the above-mentioned embodiments can be combined arbitrarily. In order to make the description concise, not all possible combinations of the technical features in the above-mentioned embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0068] The above-described embodiments merely represent several implementation methods of the present application. While the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the present invention. It should be noted that a person skilled in the art could make various modifications and improvements without departing from the spirit of the present application, all of which fall within the scope of protection of the present application. Therefore, the scope of protection of the present patent application shall be determined by the appended claims.

Claims

1. A display panel, characterized in that: include: substrate; a planarization layer, located on one side of the substrate; a light-emitting device layer, located on a side of the planarization layer away from the substrate, and comprising a first light-emitting device and a second light-emitting device; the wavelength of light from the first light-emitting device is smaller than the wavelength of light from the second light-emitting device; an encapsulation structure, located on a side of the light-emitting device layer away from the substrate, and comprising a first inorganic layer, an organic layer, and a second inorganic layer stacked in a direction away from the substrate; In which, a first protrusion is provided on the side of the planarization layer away from the substrate, and the first light-emitting device is located on the side of the first protrusion away from the substrate; along the thickness direction of the substrate, the distance between the first light-emitting device and the second inorganic layer is smaller than the distance between the second light-emitting device and the second inorganic layer.

2. The display panel according to claim 1, wherein: The display panel further comprises a pixel defining layer located on a side of the planarization layer away from the substrate, wherein a first pixel opening and a second pixel opening are provided on the pixel defining layer, the first light emitting device is located at the first pixel opening, and the second light emitting device is located at the second pixel opening; In which, the pixel defining layer includes a first defining portion and a second defining portion, the first defining portion surrounds at least part of the outer periphery of the first pixel opening, and the second defining portion surrounds at least part of the outer periphery of the second pixel opening; along the thickness direction of the substrate, the distance between the first defining portion and the second inorganic layer is smaller than the distance between the second defining portion and the second inorganic layer.

3. The display panel according to claim 2, wherein: The first limiting portion surrounds the entire periphery of the first pixel opening, and the second limiting portion surrounds a portion of the periphery of the second pixel opening.

4. The display panel according to claim 3, wherein: The first pixel opening is adjacent to the second pixel opening, and the first limiting portion of the periphery of the first pixel opening also surrounds a portion of the periphery of the second pixel opening.

5. The display panel according to claim 2, wherein: The first limiting portion surrounds the entire periphery of the first pixel opening, and the second limiting portion surrounds the entire periphery of the second pixel opening.

6. The display panel according to claim 2, wherein: The light emitting device layer further includes a third light emitting device, wherein the wavelength of light of the third light emitting device is greater than the wavelength of light of the first light emitting device and smaller than the wavelength of light of the second light emitting device; A second protrusion is provided on a side of the planarization layer away from the substrate, and the third light emitting device is located on a side of the second protrusion away from the substrate; Along the thickness direction of the substrate, the distance between the second protrusion and the second inorganic layer is greater than the distance between the first protrusion and the second inorganic layer; the distance between the third light-emitting device and the second inorganic layer is greater than the distance between the first light-emitting device and the second inorganic layer, and smaller than the distance between the second light-emitting device and the second inorganic layer.

7. The display panel according to claim 6, wherein: A third pixel opening is provided on the pixel defining layer, and the third light emitting device is provided at the third pixel opening; The pixel defining layer also includes a third defining portion, which surrounds at least part of the periphery of the third pixel opening; the distance between the third defining portion and the second inorganic layer is smaller than the distance between the second defining portion and the second inorganic layer, and greater than the distance between the first defining portion and the second inorganic layer.

8. The display panel according to claim 7, wherein: The third defining portion surrounds the entire periphery of the third pixel opening, or the third defining portion surrounds a portion of the periphery of the third pixel opening.

9. The display panel according to claim 7, wherein: The first pixel opening is disposed adjacent to the third pixel opening, and the first limiting portion of the periphery of the first pixel opening also surrounds a portion of the periphery of the third pixel opening.

10. The display panel according to claim 7, wherein: The display panel further includes a light blocking layer, which is provided on a side of the pixel defining layer away from the substrate; The light blocking layer is provided with a first light-transmitting hole, a second light-transmitting hole and a third light-transmitting hole, the first light-transmitting hole is connected to the first pixel opening, the second light-transmitting hole is connected to the second pixel opening, and the third light-transmitting hole is connected to the third pixel opening; The orthographic projection of the light blocking layer on the substrate is located within the orthographic projection range of the pixel defining layer on the substrate.

11. The display panel according to claim 6, wherein: The display panel further comprises a lens layer located on a side of the packaging structure away from the substrate; The lens layer includes a first lens portion, a second lens portion, and a third lens portion. The orthographic projection of the first lens portion on the substrate covers the orthographic projection of the first light-emitting device on the substrate. The orthographic projection of the second lens portion on the substrate covers the orthographic projection of the second light-emitting device on the substrate. The orthographic projection of the third lens portion on the substrate covers the orthographic projection of the third light-emitting device on the substrate.

12. A display device, characterized in that: The display panel comprises the display panel according to any one of claims 1 to 11.

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