Display panel and display device

Abstract

The present invention discloses a display panel and a display device. The display panel comprises a light-emitting element and a packaging cover plate. The packaging cover plate is located on the light-emitting side of the light-emitting element. By arranging a plurality of spaced shading structures on a side of the packaging cover plate close to the light-emitting element, the shading structures at least partially surround the light-emitting element along the thickness direction of the display panel to form a glass cover plate with a light control function. This can avoid increasing the attachment of an LCF film, reduce the thickness of the display panel, ensure the light emission of the display panel at a positive viewing angle, ensure the display brightness of the display panel, reduce the power consumption of the display panel, and meet the application requirements of a vehicle-mounted display screen.

Description

Technical Field

[0001] Embodiments of the present invention relate to the field of display technology, and in particular to a display panel and a display device. Background Art

[0002] To prevent light from hitting the windshield and reflecting into the eyes, potentially affecting driving safety, in-vehicle displays typically use a light control film (LCF) to limit the viewing angle. However, this can result in poor display quality. Summary of the Invention

[0003] The present invention provides a display panel and a display device. According to the structure of the light-emitting elements of the display panel, multiple shading structures are arranged in the packaging cover plate to limit the emission angle of the light-emitting elements to remain consistent, thereby ensuring the light output brightness of the display panel at a normal viewing angle and reducing the power consumption of the display panel.

[0004] In a first aspect, an embodiment of the present invention provides a display panel, comprising a light-emitting element and a package cover plate, wherein the package cover plate is located on a light-emitting side of the light-emitting element;

[0005] The package cover plate includes a plurality of light-shielding structures arranged at intervals, and the plurality of light-shielding structures are located on a side of the package cover plate close to the light-emitting element;

[0006] Along the thickness direction of the display panel, the light shielding structure at least partially surrounds the light emitting element.

[0007] In a second aspect, an embodiment of the present invention provides a display device, comprising the display panel provided in the first aspect.

[0008] The display panel provided by an embodiment of the present invention includes a light-emitting element and a packaging cover plate. The packaging cover plate is located on the light-emitting side of the light-emitting element. By arranging a plurality of spaced-apart shading structures on the side of the packaging cover plate close to the light-emitting element, the shading structure at least partially surrounds the light-emitting element along the thickness direction of the display panel to form a glass cover plate with a light control function. This can avoid increasing the attachment of the LCF film, reduce the thickness of the display panel, ensure the light output of the display panel at a positive viewing angle, ensure the display brightness of the display panel, reduce the power consumption of the display panel, and meet the application requirements of the vehicle display screen. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] Figure 1 This is a structural diagram of a display panel provided by the prior art;

[0010] Figure 2 is a structural schematic diagram of a display panel provided by an embodiment of the present invention;

[0011] Figure 3 is a structural diagram of another display panel provided by an embodiment of the present invention;

[0012] Figure 4 yes Figure 2 A schematic cross-sectional view along the AA' direction;

[0013] Figure 5 yes Figure 2 A schematic cross-sectional view along the BB' direction;

[0014] Figure 6 yes Figure 2 Another cross-sectional schematic diagram along the BB' direction;

[0015] Figure 7 yes Figure 2 Another cross-sectional schematic diagram along the BB' direction;

[0016] Figure 8 It is a structural schematic diagram of a display device provided by an embodiment of the present invention. DETAILED DESCRIPTION

[0017] The present invention will be further described in detail below with reference to the accompanying drawings and examples. It will be understood that the specific embodiments described herein are intended only to illustrate the present invention and are not intended to limit the present invention. It should also be noted that, for ease of description, the accompanying drawings only illustrate portions relevant to the present invention, not all structures.

[0018] Figure 1 This is a schematic diagram of the structure of a display device provided by the prior art. Figure 1 As shown, a display panel 100 in the prior art includes a light-emitting element 11 and a packaging cover plate 12 and a light-control film 13 located on the light-emitting side of the light-emitting element 11 in sequence. Since the light-control film 13 is an additional film layer, an extra attachment process is required. At the same time, the light-control film 13 is not set according to the structure of the light-emitting element 11 of the display panel 100, and it is easy to block the light output of the display panel at a positive viewing angle, thereby reducing the brightness of the display panel and increasing the power consumption of the display panel.

[0019] Based on the above technical problems, the inventors have discovered that, according to the structure of the light-emitting element, a shading structure can be set in the package cover plate to limit the emission angle of the light-emitting element to be consistent, thereby ensuring the brightness of the light emitted at the normal viewing angle of the display panel and reducing the power consumption of the display panel. Based on this, the inventors have further studied the technical solution of the embodiment of the present invention. Specifically, the embodiment of the present invention provides a display panel including a light-emitting element and a package cover plate, wherein the package cover plate is located on the light-emitting side of the light-emitting element; the package cover plate includes a plurality of spaced shading structures, and the plurality of shading structures are located on the side of the package cover plate close to the light-emitting element; along the thickness direction of the display panel, the shading structure at least partially surrounds the light-emitting element.

[0020] By adopting the above technical solution, a plurality of spaced-apart shading structures are provided on the side of the packaging cover plate close to the light-emitting element. Along the thickness direction of the display panel, the shading structure at least partially surrounds the light-emitting element to form a glass cover plate with light control function. This can avoid increasing the LCF film attachment, reduce the thickness of the display panel, ensure the light output of the display panel at a positive viewing angle, ensure the display brightness of the display panel, reduce the power consumption of the display panel, and meet the application requirements of the vehicle display screen.

[0021] The above is the core concept of the present invention. The following will be combined with the accompanying drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative efforts shall fall within the scope of protection of the present invention.

[0022] Figure 2 is a structural schematic diagram of a display panel provided by an embodiment of the present invention; Figure 3 is a structural diagram of another display panel provided by an embodiment of the present invention; Figure 4 yes Figure 2 A schematic cross-sectional view along the AA' direction. Figure 2-Figure 4 As shown, the display panel 200 provided by the embodiment of the present invention includes a light-emitting element 21 and a packaging cover plate 22, and the packaging cover plate 22 is located on the light-emitting side of the light-emitting element 21; the packaging cover plate 22 includes a plurality of spaced-apart shading structures 23, and the plurality of shading structures 23 are located on the side of the packaging cover plate 22 close to the light-emitting element 21; along the thickness direction of the display panel (as shown in the Z direction in the figure), the shading structure 23 at least partially surrounds the light-emitting element 21.

[0023] Specifically, the display panel provided in the embodiment of the present invention includes a liquid crystal display (LCD), an organic light emitting diode display (OLED), a micro light emitting diode display (Micro LED), an active-matrix organic light emitting diode display (AMOLED), a quantum dot light emitting diode display (QLED), etc. The display panel includes a light emitting element 21 and a packaging cover plate 22. The light emitting element 21 includes an organic light emitting diode display (OLED), a micro light emitting diode (MicroLED), an active-matrix organic light emitting diode (AMOLED), a quantum dot light emitting diode (QLED), etc. The packaging cover plate 22 includes a glass cover plate, which is located on the light emitting side of the light emitting element 21 and is used to encapsulate and protect the various film layers of the display panel. The light-emitting side is the direction from the light-emitting element 21 to the package cover 22 , which is indicated by the positive direction of Z in the figure.

[0024] Multiple spaced-apart light-shielding structures 23 are provided on the side of the package cover plate 22 near the light-emitting element 21, replacing the conventional LCF film attachment method and reducing the thickness of the display panel. As shown in the Z direction of the figure, based on the structure and positional arrangement of the light-emitting element 21, the light-shielding structures 23 are arranged so that their vertical projections on the plane where the light-emitting element 21 resides at least partially surround the light-emitting element 21. This prevents the light-shielding structures 23 from affecting the brightness of the display panel, ensuring the display brightness at the normal viewing angle (as shown in the positive Z direction of the figure), and reducing the power consumption of the display panel. By adjusting the height and arrangement density of the light-shielding structures 23, the light rays S1 emitted by the light-emitting element 21 are partially blocked by the light-shielding structures 23, while the light rays S2 emitted from the package cover plate 22 after passing through the light-shielding structures 23 are emitted at the same tilt angle θ, thus limiting the maximum emission angle of the light-emitting element 21 to a uniform value. This creates a glass cover plate with light control functionality, realizing a display panel with light control functionality. This prevents interference of reflected light on the user's eyes in in-vehicle applications and meets the application requirements of in-vehicle display screens.

[0025] It should be noted that the display panel also includes other structures, such as a base substrate 201 and a driving circuit layer 202 located on one side of the base substrate 201. The driving circuit layer 202 is used to drive the light-emitting element 21 to emit light. Multiple structures work together to realize image display on the display panel, which will not be listed one by one here.

[0026] In summary, the display panel provided by the embodiment of the present invention includes a light-emitting element and a packaging cover plate, and the packaging cover plate is located on the light-emitting side of the light-emitting element. By arranging a plurality of spaced-apart shading structures on the side of the packaging cover plate close to the light-emitting element, the shading structure at least partially surrounds the light-emitting element along the thickness direction of the display panel to form a glass cover plate with light control function, which can avoid increasing the attachment of the LCF film, reduce the thickness of the display panel, ensure the light output of the display panel at a positive viewing angle, ensure the display brightness of the display panel, reduce the power consumption of the display panel, and meet the application requirements of the vehicle-mounted display screen.

[0027] Optional, continue combining Figure 4 As shown, the light-shielding structure 23 comprises a black light-absorbing material. For example, a laser filament cutting process can be used, taking into account the thickness of the package cover plate 22, to form a groove with a depth of more than 50 μm in the package cover plate 22, and the groove is filled with black light-absorbing material to form a plurality of light-shielding structures 23 arranged at intervals.

[0028] On the basis of the above embodiment, continue to combine Figure 2 and Figure 3 As shown, optionally, a plurality of shading structures 23 are arranged at intervals along a first direction (as shown in the X direction in the figure) and extend along a second direction (as shown in the Y direction in the figure); the first direction and the second direction intersect (taking the orthogonality of the X direction and the Y direction in the figure as an example), and respectively intersect with the thickness direction of the display panel; along the thickness direction of the display panel (as shown in the Z direction in the figure), the shading structure 23 is located between two adjacent light-emitting elements 21.

[0029] Specifically, such as Figure 2 As shown, Figure 2 FIG shows that the light emitting elements 21 of the same color are arranged along the Y direction, and the light emitting elements 21 of different colors are regularly arranged along the X direction. Figure 2This is only one possible arrangement of the light-emitting elements 21; more arrangements are not listed here. According to the arrangement pattern of the light-emitting elements 21, multiple shading structures 23 are arranged in intervals along the X direction in the figure, and each shading structure 23 extends along the Y direction in the figure, so that the vertical projection of the shading structure 23 along the Z direction in the figure is located between two adjacent light-emitting elements 21. Through this structural design, the shading structures 23 can prevent the light from emitting from the light-emitting elements 21 from being blocked at a normal viewing angle, thereby ensuring the brightness of the display panel. The light-emitting direction of the light-emitting elements 21 is limited, so that the maximum emission angle θ of the light emitted by all light-emitting elements 21 is the same.

[0030] On the basis of the above embodiment, continue to refer to Figure 3 As shown, optionally, the plurality of shading structures 23 include a first shading portion 2301 and a second shading portion 2302; the first shading portion 2301 is arranged along a first direction (as shown in the X direction in the figure) and extends along a second direction (as shown in the Y direction in the figure); the second shading portion 2302 is arranged along the second direction and extends along the first direction; the first direction and the second direction intersect and respectively intersect with the thickness direction of the display panel (as shown in the Z direction in the figure); the first shading portion 2301 and the second shading portion 2302 define the setting interval of the light-emitting element 21.

[0031] Specific, combined Figure 3 As shown, Figure 3 FIG shows that the light emitting elements 21 of the same color are arranged along the Y direction, and the light emitting elements 21 of different colors are regularly arranged along the X direction. Figure 3 This is just one feasible arrangement of the light-emitting element 21. There are more arrangement methods that are not listed here one by one. The multiple shading structures 23 include a first shading portion 2301 and a second shading portion 2302 that are interconnected. According to the arrangement rule of the light-emitting element 21, the first shading portion 2301 is arranged along the X direction in the figure and extends along the Y direction in the figure. The second shading portion 2302 is arranged along the Y direction in the figure and extends along the X direction in the figure. The first shading portion 2301 and the second shading portion 2302 cross to form a grid, and the light-emitting element 21 is located in the grid-shaped setting interval. Through this structural design, the shading structure 23 can avoid blocking the light emitted from the light-emitting element 21 at the positive viewing angle, thereby ensuring the luminous brightness of the display panel; at the same time, the maximum emission angle θ of the light emitted in each direction from the light-emitting element 21 can be limited to be the same.

[0032] Figure 5 yes Figure 2 A schematic cross-sectional view along the BB' direction. Based on the above embodiment, combined with Figure 2 and Figure 5As shown, the light-emitting element 21 includes a first color light-emitting element 211 and a second color light-emitting element 212, the first color light-emitting element 211 is used to emit a first color light, and the second color light-emitting element 212 is used to emit a second color light; the wavelength of the first color light is λ1, the wavelength of the second color light is λ2, λ1>λ2; the first color light has a first maximum incident angle α1 and a first maximum exit angle β1 on the side surface of the packaging cover 22 away from the light-emitting element 21, and the second color light has a second maximum incident angle α2 and a second maximum exit angle β2 on the side surface of the packaging cover 22 away from the light-emitting element 21; wherein, α1>α2, β1=β2.

[0033] Specific, combined Figure 2 and Figure 5 As shown, the light emitting element 21 includes a first color light emitting element 211, a second color light emitting element 212 and a third color light emitting element 213, such as a red light emitting element r, a green light emitting element g and a blue light emitting element b respectively. The wavelength of the red light emitted by the first color light emitting element 211 is λ1, the wavelength of the green light emitted by the second color light emitting element 212 is λ2, and the wavelength of the green light emitted by the third color light emitting element 213 is λ3, λ1>λ2>λ3; the red light has a first maximum incident angle α1 and a first maximum exit angle β1 on the side surface of the packaging cover 22 away from the light emitting element 21, the green light has a second maximum incident angle α2 and a second maximum exit angle β2 on the side surface of the packaging cover 22 away from the light emitting element 21, and the blue light has a second maximum incident angle α3 and a second maximum exit angle β3 on the side surface of the packaging cover 22 away from the light emitting element 21. Combined Figure 5 As shown, according to the law of refraction of light in the medium:

[0034] n r0 sin(β1)=n r1 sin(α1), (1.1);

[0035] n g0 sin(β2)=n g1 sin(α2), (1.2);

[0036] n b0 sin(β3)=n b1 sin(α3), (1.3);

[0037] Among them, n r0 is the refractive index of the red light emitting element r in air, n r1 is the refractive index of the red light emitting element r in the package cover 22; n g0 is the refractive index of the green light emitting element g in air, n g1is the refractive index of the green light emitting element g on the package cover 22; n b0 is the refractive index of the blue light emitting element b in air, n b1 is the refractive index of the blue light emitting element b on the package cover 22 .

[0038] Combining formulas (1.1)-(1.3), the refractive index of wavelengths λ1, λ2 and λ3 in air satisfies: n r0 =n g0 =n b0 Since the refractive index of light of different wavelengths in the same medium is different, according to λ1>λ2>λ3, the refractive index of light of wavelengths λ1, λ2 and λ3 in the package cover 22 satisfies: n r1 <n g1 <n b1 To limit the maximum emission angles β1 = β2 = β3 for the red light-emitting element r, the green light-emitting element g, and the blue light-emitting element b on the side of the package cover plate 22 away from the light-emitting element 21, respectively, that is, the maximum emission angles after the light-shielding structure 23 blocks the light emitted by the light-emitting element 21 with wavelengths λ1, λ2, and λ3 are the same, the height and / or spacing of the light-shielding structure 23 can be adjusted so that after partially blocking the light with wavelengths λ1, λ2, and λ3, the maximum incident angles α1, α2, and α3 for the red light-emitting element r, the green light-emitting element g, and the blue light-emitting element b on the side of the package cover plate 22 away from the light-emitting element 21, respectively, satisfy α1>α2>α3, thereby obtaining a display panel with consistent emission angles. When used in an in-vehicle display screen, it can prevent light emitted from the screen from shining on the windshield and reflecting into the human eye, ensuring driving safety.

[0039] It should be noted that the display panel also includes an encapsulant 25 located between the light-emitting elements 21 and the glass cover. The encapsulant 25 covers the first-color light-emitting elements 211, the second-color light-emitting elements 212, and the third-color light-emitting elements 213, thereby securing and protecting the light-emitting elements 21. Light emitted by the first-color light-emitting elements 211, the second-color light-emitting elements 212, and the third-color light-emitting elements 213 is refracted by the encapsulant 25 and the glass cover, and then emitted from the light-emitting side. Given that the refractive indices of light in the encapsulant 25 and the glass cover are similar and their refraction patterns are the same, this embodiment of the present invention only uses the refraction pattern of light in the glass cover for calculations and analysis.

[0040] Some feasible implementation methods are listed below. By adjusting the height of the shading structure 23 and / or adjusting the distance between the shading structure 23 and the light-emitting element 21, the angle of the outgoing light of the display panel is limited to be consistent, thereby ensuring the normal display of the display panel and meeting the application of the limited angle of the outgoing light.

[0041] As a feasible implementation method, continue to refer to Figure 5 As shown, optionally, the shading structure 23 includes a first shading structure 231 and a second shading structure 232. Along the thickness direction of the display panel (as shown in the Z direction in the figure), the first shading structure 231 is located between the first color light-emitting element 211 and the second color light-emitting element 212, and the second shading structure 232 is located on the side of the second color light-emitting element 212 away from the first color light-emitting element 211; along the first direction, the maximum distance L1 between the first color light-emitting element 211 and the side of the first shading structure 231 close to the first color light-emitting element 211 is greater than the maximum distance L2 between the second color light-emitting element 212 and the side of the second shading structure 232 close to the second color light-emitting element 212; the first direction is parallel to the arrangement direction of the multiple shading structures 23.

[0042] For details, please refer to Figure 5 As shown, along the X direction in the figure, the light shielding structure 23 above the adjacent first color light emitting element 211 and second color light emitting element 212 is taken as an example. The first color light emitting element 211 may be a red light emitting element r, and the second color light emitting element 212 may be a green light emitting element g; alternatively, the first color light emitting element 211 may be a green light emitting element, and the second color light emitting element 212 may be a blue light emitting element b. This embodiment of the present invention is described using the example of two adjacent light emitting elements 21 having different emission wavelengths.

[0043] The shading structure 23 includes a first shading structure 231 and a second shading structure 232. Along the Z direction in the figure, the vertical projection of the first shading structure 231 on the plane where the light-emitting element 21 is located is located between the first color light-emitting element 211 and the second color light-emitting element 212, and the vertical projection of the second shading structure 232 on the plane where the light-emitting element 21 is located is located on the side of the second color light-emitting element 212 away from the first color light-emitting element 211. The first shading structure 231 is used to block part of the light S3 emitted by the first color light-emitting element 211, and the second shading structure 232 is used to block part of the light S4 emitted by the second color light-emitting element 212.

[0044] Along the X direction in the figure, the horizontal distance L1 between the first light shielding structure 231 and the first color light emitting element 211 and the horizontal distance L2 between the second light shielding structure 232 and the second color light emitting element 212 satisfy the formula:

[0045] L1=(h1+h x )tan(α1),(1.4);

[0046] L2=(h2+h x )tan(α2),(1.5);

[0047] Wherein, h1 is the height of the first light shielding structure 231, h2 is the height of the second light shielding structure 232, and h x is the distance between the light emitting surface of the light emitting element 21 and the light shielding structure 23 along the Z direction in the figure.

[0048] In combination with formulas (1.4)-(1.5), on the basis of α1>α2, along the X direction in the figure, the horizontal distance between the first shading structure 231 and the first color light-emitting element 211 can be adjusted to L1, and the horizontal distance between the second shading structure 232 and the second color light-emitting element 212 can be adjusted to L2, and L1>L2 can be set to limit the angle of the output light of the display panel to be consistent. According to the numerical values ​​of α1 and α2, the height h1 of the first shading structure 231 and the height h2 of the second shading structure 232 can be equal or different. Along the X direction in the figure, the light with the maximum emission angle α11 of the light emitting surface of the first color light emitting element 211 away from the first light shading structure 231 corresponds to the maximum incident angle α1 of the surface of the package cover 22 away from the light emitting element 21. The light with an emission angle within the range of 0 to α11 can be emitted through the package cover 22, and the light S3 with an emission angle greater than the maximum emission angle α11 is blocked by the first light shading structure 231; the light with the maximum emission angle α22 of the light emitting surface of the second color light emitting element 212 away from the second light shading structure 232 corresponds to the maximum incident angle α1 of the surface of the package cover 22 away from the light emitting element 21. The maximum incident angle α2 of the surface of the side of the packaging cover plate 22 away from the light-emitting element 21 should be set, and the light with an emission angle within the range of 0 to α22 can pass through the glass cover plate and be emitted. The light S4 with an emission angle greater than the maximum emission angle α22 is blocked by the second shading structure 232, thereby limiting the first color light-emitting element 211 and the second color light-emitting element 212 to be emitted at the same maximum emission angle (β1=β2=β3) on the surface of the side of the packaging cover plate 22 away from the light-emitting element 21, respectively, to obtain a display panel with consistent angles of emitted light.

[0049] It should be noted that the maximum emission angle α11 of the first color light emitting element 211 is approximately equal to the maximum incident angle α1, and the maximum emission angle α22 of the second color light emitting element 212 is approximately equal to the maximum incident angle α2.

[0050] Based on the above embodiments, Figure 5 As shown, preferably, along the thickness direction of the display panel, the heights of any two light shielding structures 23 are the same.

[0051] For example, combined Figure 5As shown, any two light-shielding structures 23 are arranged to have the same height along the Z direction in the figure. For example, the first light-shielding structure 231, the second light-shielding structure 232, and the fifth light-shielding structure 235 are arranged to have the same height, that is, h1 = h2 = h3. By arranging any two light-shielding structures 23 to have the same height, the manufacturing process of the light-shielding structures 23 can be simplified, facilitating the mass production of display panels and improving production yield.

[0052] Figure 6 yes Figure 2 Another cross-sectional schematic diagram along the BB' direction; Figure 7 yes Figure 2 Another cross-sectional schematic diagram along the BB' direction. As a feasible embodiment, combined with Figure 2 and Figure 6-Figure 7 As shown, optionally, the shading structure 23 includes a third shading structure 233 and a fourth shading structure 234. Along the thickness direction of the display panel, the third shading structure 233 is located between the first color light-emitting element 211 and the second color light-emitting element 212, and the fourth shading structure 234 is located on the side of the second color light-emitting element 212 away from the first color light-emitting element 211; the third shading structure 233 includes a first shading body 2330 and a first shading point a. Along the first direction (as shown in the X direction in the figure), the first shading point a is located on the side of the first shading body 2330 close to the first color light-emitting element 211, and along the thickness direction of the display panel (as shown in the Z direction in the figure), the first shading point a is located on the side of the first shading body 2330 away from the first color light-emitting element 211; the fourth shading structure 234 includes a second shading body 2340 and a second shading point b. Along the first direction (as shown in the X direction in the figure), the second shading point b is located on the second shading body 2340 close to the second color light-emitting element 212 On one side, along the thickness direction of the display panel, the second shading point b is located on the side of the second shading body away from the second color light-emitting element 212; the first direction is parallel to the arrangement direction of the multiple shading structures 23; along the thickness direction of the display panel, the second shading point b is located on the side of the first shading point a away from the light-emitting element 21.

[0053] For details, please refer to Figure 6 and Figure 7In the figure, along the X direction, taking the shading structure 23 above the adjacent first-color light-emitting element 211 and second-color light-emitting element 212 as an example, the shading structure 23 is positioned according to the arrangement of the light-emitting elements 21. Specifically, continuing with formulas (1.4)-(1.5), the maximum incident angle α1 of the first-color light-emitting element 211 on the side of the package cover 22 away from the light-emitting element 21 and the maximum incident angle α2 of the second-color light-emitting element 212 on the side of the package cover 22 away from the light-emitting element 21 can be adjusted by changing the height of the shading structure 23. Along the Z direction in the figure, the vertical projection of the third shading structure 233 on the plane where the light-emitting element 21 is located is located between the first color light-emitting element 211 and the second color light-emitting element 212, and the vertical projection of the fourth shading structure 234 on the plane where the light-emitting element 21 is located is located on the side of the second color light-emitting element 212 away from the first color light-emitting element 211. The third shading structure 233 is used to block part of the light emitted by the first color light-emitting element 211, and the fourth shading structure 234 is used to block part of the light emitted by the second color light-emitting element 212.

[0054] The third light shielding structure 233 includes a first light shielding body 2330 and a first light shielding point a. Along the X direction in the figure, The first shading point a is located on the side of the first shading body 2330 close to the first color light-emitting element 211. Along the Z direction in the figure, the first shading point a is located on the side of the first shading body 2330 away from the first color light-emitting element 211. The first shading point a is selected as the edge point on the first shading body 2330, which affects the maximum incident angle α1 of the first color light-emitting element 211 on the side of the packaging cover 22 away from the light-emitting element 21; the fourth shading structure 234 includes a second shading body 2340 and a second shading point b. Along the X direction in the figure, the second shading point b is located on the side of the second shading body 2340 close to the second color light-emitting element 212. Along the Z direction in the figure, the second shading point b is located on the side of the second light-shading body away from the second color light-emitting element 212. The second shading point b is the edge point of the second shading body 2340, which affects the maximum incident angle α2 of the second color light-emitting element 212 on the side of the packaging cover 22 away from the light-emitting element 21.

[0055] Combined with formulas (1.4)-(1.5), along the Z direction in the figure, by reasonably adjusting the distance L3 between the first shading point a and the first color light-emitting element 211 and the distance L4 between the second shading point b and the second color light-emitting element 212, and setting the second shading point b to be located on the side of the first shading point a away from the light-emitting element 21, it can be ensured that α1>α2. Specifically, the light-emitting surface on the side of the first color light-emitting element 211 away from the third shading structure 233 forms a light with a maximum emission angle α11 at the first shading point a, corresponding to the maximum incident angle α1 of the side surface of the package cover plate 22 away from the light-emitting element 21. The light S2 with an emission angle within the range of 0 to α11 can be emitted through the package cover plate 22, and the light with an emission angle greater than the maximum emission angle α11 is blocked by the third shading structure 233; the light-emitting surface on the side of the second color light-emitting element 212 away from the fourth shading structure 234 forms a maximum incident angle α11 at the second shading point b. The light with an emission angle α22 corresponds to the maximum incident angle α2 of the surface of the side of the packaging cover plate 22 away from the light-emitting element 21. The light S2 with an emission angle within the range of 0 to α22 can be emitted after passing through the packaging cover plate 22. The light with an emission angle greater than the maximum emission angle α22 is blocked by the fourth shading structure 234, thereby limiting the first color light-emitting element 211 and the second color light-emitting element 212 to emit at the same maximum emission angle (β1=β2) on the surface of the side of the packaging cover plate 22 away from the light-emitting element 21, respectively, to obtain a display panel with consistent angles of emitted light.

[0056] On the basis of the above embodiment, continue to refer to Figure 6 As shown, optionally, along the first direction, the maximum distance L3 between the first color light-emitting element 211 and the side of the third shading structure 233 close to the first color light-emitting element 211 is equal to the maximum distance L4 between the second color light-emitting element 212 and the side of the fourth shading structure 234 close to the second color light-emitting element 212; the first direction is parallel to the arrangement direction of the multiple shading structures 23.

[0057] Preferably, combined Figure 5 and Figure 6As shown, along the X direction in the figure, on the basis of the second shading point b being located on the side of the first shading point a away from the light-emitting element 21, the maximum distance between the first color light-emitting element 211 and the side of the third shading structure 233 close to the first color light-emitting element 211 is L3, which is equal to the maximum distance between the second color light-emitting element 212 and the side of the fourth shading structure 234 close to the second color light-emitting element 212 is L4, and L3=L4 is set, that is, the distance between the shading structure 23 and the adjacent light-emitting element 21 is equal. Such a setting can not only limit the maximum emission angle β1=β2 of the first color light-emitting element 211 and the second color light-emitting element 212 on the surface of the side of the packaging cover plate 22 away from the light-emitting element 21, but also reduce the preparation process of the shading structure 23, facilitate the large-scale production of display panel products, and improve the production yield. Among them, considering that the sizes of light-emitting elements 21 of different colors may be different, when the sizes of the first color light-emitting element 211 and the second color light-emitting element 212 are the same, the two adjacent shading structures 23 are arranged at equal intervals, which can further reduce the preparation process and ensure that the angle of the output light of the display panel is consistent.

[0058] On the basis of the above embodiment, continue to refer to Figure 6 and Figure 7 As shown, optionally, the third shading structure 233 also includes a third shading point c. Along the first direction, the third shading point c is located on the side of the first shading body away from the first color light-emitting element 21, and along the thickness direction of the display panel, the third shading point c is located on the side of the first shading body away from the first color light-emitting element 211; along the thickness direction of the display panel, the third shading point c is at the same height as the second shading point b, and along the first direction, the distance between the third shading point c and the second color light-emitting element 212 is the same as the distance between the second shading point b and the second color light-emitting element 212.

[0059] Specifically, continue to combine Figure 6 and Figure 7As shown, taking the first color light-emitting element 211 and the second color light-emitting element 212 as an example, the third light-shielding structure 233 further includes a third light-shielding point c near the color light-emitting element 21. Along the X direction in the figure, the third light-shielding point c is an edge point away from the first light-shielding point a. Along the X direction in the figure, the third light-shielding point c is located on the side of the first light-shielding body away from the first color light-emitting element 211. Along the Z direction in the figure, the third light-shielding point a is located on the side of the first light-shielding body away from the first color light-emitting element 211. This affects the maximum incident angle α2 of the second color light-emitting element 212 on the side of the package cover 22 away from the light-emitting element 21. Along the Z direction in the figure, the third light-shielding point c is set at the same height as the second light-shielding point b. Along the first direction, the distance between the third light-shielding point c and the second color light-emitting element 212 is the same as the distance between the second light-shielding point b and the second color light-emitting element 212. That is, the third light-shielding point c and the second light-shielding point b are symmetrical about the normal viewing angle of the second color light-emitting element 21. Through symmetrical design, the light emitting surface on the side of the second color light emitting element 212 away from the third shading structure 233 forms a maximum emission angle α22 at the third shading point c, which is equal to the maximum emission angle α22 formed by the light emitting surface on the side of the second color light emitting element 212 away from the fourth shading structure 234 at the second shading point b. The adjacent third shading structure 233 and the fourth shading structure 234 jointly limit the maximum emission angle β2 of the second color light emitting element 212 on the side surface of the packaging cover plate 22 away from the light emitting element 21 to be consistent.

[0060] It can be understood that, along the Z direction in the figure, any two shading structures 23 surrounding the light-emitting element 21, by setting the vertical (along the Z direction in the figure) and horizontal (along the X direction in the figure) position relationship between the edge points of the shading structure 23 and the light-emitting element 21, can satisfy the maximum emission angle of the light-emitting element 21 on the side surface of the packaging cover 22 away from the light-emitting element 21 as recorded in the above-mentioned embodiment, and ultimately achieve the goal of limiting the maximum emission angles of all light-emitting elements 21 on the side surface of the packaging cover 22 away from the light-emitting element 21 to be the same. Examples are not listed one by one here.

[0061] On the basis of the above embodiment, continue to refer to Figure 6 As shown, optionally, the third light-shielding structure 233 is integrally provided.

[0062] Specifically, the side of the third light-shielding structure 233 closest to the first-color light-emitting element 211 can partially block light from the first-color light-emitting element 211, while the side of the third light-shielding structure 233 closest to the second-color light-emitting element 212 can partially block light from the second-color light-emitting element 212. The integrated arrangement of the third light-shielding structure 233 can reduce the number of light-shielding structures 23 and increase the width w of the third light-shielding structure 233. As shown along the X direction in the figure, the width w is approximately 0 to 20 μm, which reduces the difficulty of etching when laser-etching the grooves.

[0063] On the basis of the above embodiment, continue to refer to Figure 7 As shown, optionally, the third shading structure 233 includes a first sub-shading structure 2331 close to the first color light-emitting element 211 and a second sub-shading structure 2332 close to the second color light-emitting element 212, and the first sub-shading structure 2331 and the second sub-shading structure 2332 are arranged separately; the first sub-shading structure 2331 includes a first shading point a, and the second sub-shading structure 2332 includes a third shading point c.

[0064] Specific, combined Figure 7 As shown, the third light-shielding structure 233 is provided in a split configuration. The first sub-light-shielding structure 2331 is located near the first-color light-emitting element 211 and partially blocks light from the first-color light-emitting element 211. The second sub-light-shielding structure 2332 is located near the second-color light-emitting element 212 and partially blocks light from the second-color light-emitting element 212. The split configuration of the third light-shielding structure 233 can reduce the width w of the third light-shielding structure 233. As shown in the X direction in the figure, the widths of the first sub-light-shielding structure 2331 and the second sub-light-shielding structure 2332 are minimized to minimize the impact of the etched grooves on the integrity of the package cover plate 22, ensuring the strength of the package cover plate 22 and preventing cracks and breakage.

[0065] On the basis of the above embodiment, continue to refer to Figure 3 As shown, optionally, the package cover plate 22 further includes a package cover plate body 24 , which covers the light shielding structure 23 ; along the thickness direction of the display panel, the height of the package cover plate body 24 is H, and the height of the light shielding structure 23 is h0, 0<h0<H.

[0066] Specifically, the packaging cover plate 22 also includes a packaging cover plate body 24. The packaging cover plate body 24 can be made of a translucent glass material. The packaging cover plate body 24 is arranged to cover the shading structure 23, which can protect the shading structure 23. At the same time, the height h0 of the shading structure 23 is set to be smaller than the height H of the packaging cover plate body 24, which can ensure the strength of the packaging cover plate 22, avoid cracks and breakage of the packaging cover plate 22, and play a role in encapsulating and protecting the display panel.

[0067] Based on the same inventive concept, an embodiment of the present invention further provides a display device. Figure 8 A schematic diagram of the structure of a display device provided by an embodiment of the present invention is shown in FIG. Figure 8 As shown, the display device includes any one of the display panels provided in the above embodiments. Figure 8 As shown, the display device 300 includes a display panel 200. Therefore, the display device also has the beneficial effects of the display panel in the above embodiment. The similarities can be understood by referring to the above explanation of the display panel, which will not be repeated below.

[0068] The display device 300 provided by the embodiment of the present invention can be Figure 8 The mobile phone shown can also be any electronic product with a display function, including but not limited to the following categories: televisions, laptops, desktop monitors, tablet computers, digital cameras, smart bracelets, smart glasses, car displays, industrial control equipment, medical display screens, touch interactive terminals, etc. The embodiments of the present invention do not specifically limit this.

[0069] Note that the above are only preferred embodiments of the present invention and the technical principles employed. Those skilled in the art will appreciate that the present invention is not limited to the specific embodiments described herein, and that various obvious changes, readjustments, and substitutions are possible for those skilled in the art without departing from the scope of the present invention. Therefore, although the present invention has been described in detail through the above embodiments, the present invention is not limited to the above embodiments and may include many other equivalent embodiments without departing from the scope of the present invention. The scope of the present invention is determined by the scope of the appended claims.

Claims

1. A display panel, characterized in that: It comprises a light-emitting element and a packaging cover plate, wherein the packaging cover plate is located at the light-emitting side of the light-emitting element; The package cover plate comprises a plurality of light shielding structures arranged at intervals, and the plurality of light shielding structures are located on a side of the package cover plate close to the light emitting element; Along the thickness direction of the display panel, the light shielding structure at least partially surrounds the light emitting element; The light emitting element comprises a first color light emitting element and a second color light emitting element, the first color light emitting element is used to emit a first color light, and the second color light emitting element is used to emit a second color light; the wavelength of the first color light is λ1, the wavelength of the second color light is λ2, λ1>λ2; The first color light has a first maximum incident angle α1 and a first maximum exit angle β1 on the side of the packaging cover away from the light-emitting element, and the second color light has a second maximum incident angle α2 and a second maximum exit angle β2 on the side of the packaging cover away from the light-emitting element; Among them, α1>α2, β1=β2.

2. The display panel according to claim 1, characterized in that: The plurality of light shielding structures are arranged at intervals along a first direction and extend along a second direction; the first direction and the second direction intersect with each other and intersect with the thickness direction of the display panel respectively; Along the thickness direction of the display panel, the light shielding structure is located between two adjacent light emitting elements.

3. The display panel according to claim 1, characterized in that: The plurality of light shielding structures include a first light shielding portion and a second light shielding portion; The first light shielding portions are arranged along the first direction and extend along the second direction; the second light shielding portions are arranged along the second direction and extend along the first direction; The first direction and the second direction intersect with each other and intersect with the thickness direction of the display panel respectively; The first light shielding portion and the second light shielding portion define an installation interval of the light emitting element.

4. The display panel according to claim 1, characterized in that: The shading structure includes a first shading structure and a second shading structure. Along the thickness direction of the display panel, the first shading structure is located between the first color light emitting element and the second color light emitting element, and the second shading structure is located on a side of the second color light emitting element away from the first color light emitting element. Along the first direction, the maximum distance L1 between the first color light-emitting element and the side of the first shading structure close to the first color light-emitting element is greater than the maximum distance L2 between the second color light-emitting element and the side of the second shading structure close to the second color light-emitting element; the first direction is parallel to the arrangement direction of the multiple shading structures.

5. The display panel according to claim 4, characterized in that: Along the thickness direction of the display panel, any two of the light shielding structures have the same height.

6. The display panel according to claim 1, characterized in that: The shading structure comprises a third shading structure and a fourth shading structure. Along the thickness direction of the display panel, the third shading structure is located between the first color light emitting element and the second color light emitting element, and the fourth shading structure is located on a side of the second color light emitting element away from the first color light emitting element. The third light-shielding structure comprises a first light-shielding body and a first light-shielding point, and along the first direction, the first light-shielding point is located on a side of the first light-shielding body close to the first color light-emitting element, and along the thickness direction of the display panel, the first light-shielding point is located on a side of the first light-shielding body away from the first color light-emitting element; the fourth light-shielding structure comprises a second light-shielding body and a second light-shielding point, and along the first direction, the second light-shielding point is located on a side of the second light-shielding body close to the second color light-emitting element, and along the thickness direction of the display panel, the second light-shielding point is located on a side of the second light-shielding body away from the second color light-emitting element; the first direction is parallel to the arrangement direction of the plurality of light-shielding structures; Along the thickness direction of the display panel, the first light shielding point is located on a side of the second light shielding point away from the light emitting element.

7. The display panel according to claim 6, characterized in that: The third light shielding structure further includes a third light shielding point, which is located on a side of the first light shielding body away from the first color light emitting element along the first direction, and is located on a side of the first light shielding body away from the first color light emitting element along the thickness direction of the display panel; Along the thickness direction of the display panel, the third shading point has the same height as the second shading point, and along the first direction, the distance between the third shading point and the second color light emitting element is the same as the distance between the second shading point and the second color light emitting element.

8. The display panel according to claim 7, characterized in that: The third light-shielding structure is integrally arranged.

9. The display panel according to claim 7, characterized in that: The third light-shielding structure comprises a first sub-light-shielding structure close to the first color light-emitting element and a second sub-light-shielding structure close to the second color light-emitting element, and the first sub-light-shielding structure and the second sub-light-shielding structure are separately arranged; The first sub-light-shielding structure includes the first light-shielding point, and the second sub-light-shielding structure includes the third light-shielding point.

10. The display panel according to claim 6, characterized in that: Along the first direction, the maximum distance between the first color light-emitting element and the side of the third shading structure close to the first color light-emitting element is equal to the maximum distance between the second color light-emitting element and the side of the fourth shading structure close to the second color light-emitting element; the first direction is parallel to the arrangement direction of the multiple shading structures.

11. The display panel according to claim 1, characterized in that: The packaging cover plate further comprises a packaging cover plate body, and the packaging cover plate body covers the light shielding structure; along the thickness direction of the display panel, the height of the packaging cover plate body is H, and the height of the light shielding structure is h1, 0<h1<H.

12. The display panel according to claim 1, characterized in that: The light shielding structure includes a black light absorbing material.

13. A display device, characterized in that: A display panel comprising any one of claims 1 to 12.

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