CN114242915A - Display panel and display device - Google Patents
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- CN114242915A CN114242915A CN202111562999.5A CN202111562999A CN114242915A CN 114242915 A CN114242915 A CN 114242915A CN 202111562999 A CN202111562999 A CN 202111562999A CN 114242915 A CN114242915 A CN 114242915A
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- 239000002184 metal Substances 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
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- 238000002834 transmittance Methods 0.000 description 2
- 238000010420 art technique Methods 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K50/00—Organic light-emitting devices
- H10K50/80—Constructional details
- H10K50/86—Arrangements for improving contrast, e.g. preventing reflection of ambient light
- H10K50/865—Arrangements for improving contrast, e.g. preventing reflection of ambient light comprising light absorbing layers, e.g. light-blocking layers
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K59/00—Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
- H10K59/10—OLED displays
- H10K59/12—Active-matrix OLED [AMOLED] displays
- H10K59/126—Shielding, e.g. light-blocking means over the TFTs
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Abstract
The embodiment of the invention provides a display panel and a display device. The display panel includes: a substrate; a display layer on one side of the substrate; the display layer comprises a plurality of light-emitting devices and a black matrix, and is positioned on one side of the display layer, which is far away from the substrate; the black matrix is provided with a plurality of first openings, and the first openings are overlapped with the light-emitting devices in the direction vertical to the plane of the substrate; the first opening comprises a first side wall and a second side wall which are opposite in a first direction, and the first direction is parallel to the plane of the substrate; an included angle formed by the first side wall and the plane where the substrate is located and facing the inside of the first opening is theta 1, and an included angle formed by the second side wall and the plane where the substrate is located and facing the inside of the first opening is theta 2, wherein theta 1 is less than 90 degrees, and theta 2 is greater than 90 degrees. The invention can improve the light emitting efficiency of the light emitting device and reduce the power consumption.
Description
Technical Field
The invention relates to the technical field of display, in particular to a display panel and a display device.
Background
In a display device, the reflection of ambient light by the display screen can severely affect the display effect. One prior art technique utilizes a filter layer to reduce the reflection of ambient light by the display screen, where the filter layer is disposed above the light emitting devices and includes filter cells and black matrices for spacing the filter cells of different colors. The arrangement of the filter layer can affect the light emitting efficiency of the light emitting device, and the power consumption is increased.
Disclosure of Invention
The embodiment of the invention provides a display panel and a display device, and aims to solve the problems of low light emitting efficiency and high power consumption of a light emitting device in the prior art.
In a first aspect, an embodiment of the present invention provides a display panel, including:
a substrate;
a display layer on one side of the substrate; the display layer comprises a plurality of light emitting devices,
the black matrix is positioned on one side of the display layer far away from the substrate; the black matrix is provided with a plurality of first openings, and the first openings are overlapped with the light-emitting devices in the direction vertical to the plane of the substrate; the first opening comprises a first side wall and a second side wall which are opposite in a first direction, and the first direction is parallel to the plane of the substrate;
an included angle formed by the first side wall and the plane where the substrate is located and facing the inside of the first opening is theta 1, and an included angle formed by the second side wall and the plane where the substrate is located and facing the inside of the first opening is theta 2, wherein theta 1 is less than 90 degrees, and theta 2 is greater than 90 degrees.
In a second aspect, an embodiment of the present invention further provides a display device, including the display panel provided in any embodiment of the present invention.
The display panel and the display device provided by the embodiment of the invention have the following beneficial effects:
in the embodiment of the invention, two opposite side walls of the first opening provided with the black matrix in the first direction have certain inclination angles, and the inclination directions of the two opposite side walls are different. The included angle formed by the first side wall and the plane of the substrate and facing the inside of the first opening is smaller than 90 degrees, and the included angle formed by the second side wall and the plane of the substrate and facing the inside of the first opening is larger than 90 degrees. Make first lateral wall and second lateral wall can mutually support, the partial light that emitting device sent can take place to reflect on first lateral wall and second lateral wall in proper order and finally jets out display panel to promote emitting device's luminous efficiency, reduced display panel consumption.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and those skilled in the art can also obtain other drawings according to the drawings without inventive labor.
Fig. 1 is a schematic partial top view of a display panel according to an embodiment of the present invention;
FIG. 2 is a schematic cross-sectional view taken along line A-A' of FIG. 1;
fig. 3 is a schematic view of a light path in which light is refracted and reflected at an interface where a filter unit and a black matrix are in contact with each other;
FIG. 4 is a schematic top view of a portion of another display panel according to an embodiment of the present invention;
FIG. 5 is a schematic cross-sectional view taken along line B-B' of FIG. 4;
FIG. 6 is a schematic top view of a portion of another display panel according to an embodiment of the present invention;
FIG. 7 is a schematic cross-sectional view of another display panel according to an embodiment of the invention;
FIG. 8 is a simplified diagram of another display panel according to an embodiment of the present invention;
FIG. 9 is a schematic top view of a portion of another display panel according to an embodiment of the present invention;
fig. 10 is a schematic view of a display device according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The terminology used in the embodiments of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used in the examples of the present invention and the appended claims, the singular forms "a," "an," and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise.
In the prior art, a filter layer is disposed above a display layer, and a filter unit in the filter layer is used to reduce the reflection of ambient light by the display screen. The filtering unit comprises a red filtering unit, a green filtering unit and a blue filtering unit. Taking red light in the ambient light as an example, the red light can penetrate through the red filter unit and irradiate the metal structure in the display panel, and the red light reflected by the metal structure and emitted to the green filter unit or the blue filter unit cannot emit out of the display panel, and cannot be recognized by human eyes, so that the reflection of the display panel to the ambient light can be reduced. However, the filter layer further comprises a black matrix for limiting adjacent filter units, and the black matrix has a light shielding characteristic and can shield large-angle light rays emitted by the light-emitting device, that is, part of the large-angle light rays emitted by the light-emitting device cannot be emitted out of the display panel, so that the light emitting efficiency of the light-emitting device is influenced, the brightness of the display panel is reduced, and the power consumption is increased.
In order to solve the problems in the prior art, embodiments of the present invention provide a display panel, in which the shape of the side wall of the opening of the black matrix is designed, and the side wall of the opening of the black matrix is used to reflect a part of light, so that the reflected light can finally exit the display panel to contribute to the light emission of the light emitting device, thereby improving the light emission efficiency of the light emitting device and reducing power consumption.
Fig. 1 is a partial top view of a display panel according to an embodiment of the invention, and fig. 2 is a cross-sectional view of the display panel at a position of a cut line a-a' in fig. 1.
As shown in fig. 1, the display panel includes a black matrix 50, and the black matrix 50 has a plurality of first openings K1, and it can be seen from a top view that the first openings K1 overlap with the light emitting devices 31.
As shown in fig. 2, the display panel includes a substrate 10, and the driving layer 20, the display layer 30, the encapsulation layer 40, the black matrix 50 and the filter unit 60 are located on the same side of the substrate 10. Wherein the content of the first and second substances,
the driving layer 20 is located on one side of the substrate 10 and the display layer 30 is located on the side of the driving layer 20 remote from the substrate 10. The display layer 30 includes a plurality of light emitting devices 31, and the light emitting devices 31 include a first electrode a, a light emitting layer b, and a second electrode c. Wherein the first electrode a is positioned on the side of the light-emitting layer b close to the substrate 10. The first electrode a is a reflecting electrode, and the second electrode c is a semi-reflecting and semi-transmitting electrode. After voltages are applied to the first electrode a and the second electrode c, respectively, the light emitting layer b can be excited to emit light. The driving layer 20 includes a pixel circuit including a plurality of transistors T, the pixel circuit for driving the light emitting device 31 to emit light.
The encapsulation layer 40 is located on a side of the display layer 30 away from the substrate 10, and the encapsulation layer 40 is used for isolating water and oxygen to ensure a service life of the light emitting device 31. In some embodiments, the encapsulation layer 40 comprises encapsulation glass. In some embodiments, the encapsulation layer 40 includes at least one inorganic layer and at least one organic layer.
The black matrix 50 is located on a side of the display layer 30 away from the substrate 10, and the black matrix 50 is located on a side of the encapsulation layer 40 away from the display layer 30. As can be seen from fig. 2, the first opening K1 overlaps the light emitting device 31 in the direction e perpendicular to the plane of the substrate 10. Wherein one light emitting device 31 corresponds to one first opening K1.
At least a portion of the filter unit 60 is positioned within the first opening K1 and contacts a sidewall of the first opening K1. The filter unit 60 includes at least a red filter unit, a green filter unit, and a blue filter unit. In some embodiments, the filtering unit 60 further includes a white filtering unit. The filtering unit 60 is disposed on the side of the display layer 30 away from the substrate 10, so that reflection of the display panel to ambient light can be reduced, and the display effect of the display panel can be improved.
In fig. 2, which shows a first direction x parallel to the plane of the substrate 10, the first opening K1 includes a first side wall B1 and a second side wall B2 opposite in the first direction x. It can be seen that the filtering unit 60 is in contact with both the first and second sidewalls B1 and B2. The angle formed by the first side wall B1 and the plane of the substrate 10 toward the inside of the first opening K1 is θ 1, and the angle formed by the second side wall B2 and the plane of the substrate 10 toward the inside of the first opening K1 is θ 2, where θ 1<90 °, and θ 2>90 °.
Although the black matrix 50 has a light-shielding property in the display panel, it still has a certain refractive index, wherein the refractive index of the black matrix 50 is greater than that of the filter unit 60. As shown in the optical path diagram of fig. 2, light emitted from the light emitting layer B toward the first sidewall B1 is emitted from the filter unit 60 to the black matrix 50, the light can be reflected on the first sidewall B1, the light reflected by the first sidewall B1 continues to propagate through the filter unit 60 and then is emitted to the second sidewall B2, and the light is reflected by the second sidewall B2 again to change its direction and is emitted to a side away from the substrate 10, so that the light extraction efficiency of the light emitting device 31 is improved.
The two opposite sidewalls of the first opening K1 where the black matrix 50 is disposed in the embodiment of the present invention each have a certain inclination angle in the first direction x, and the inclination directions of the two opposite sidewalls are different. The first side wall B1 and the plane of the substrate 10 form an angle smaller than 90 ° towards the inside of the first opening K1, while the second side wall B2 and the plane of the substrate 10 form an angle larger than 90 ° towards the inside of the first opening K1. The first side wall B1 and the second side wall B2 can be matched with each other, partial light rays emitted by the light emitting device can be reflected on the first side wall B1 and the second side wall B2 in sequence and then finally emitted out of the display panel, and the light emitting device contributes to light emitting of the light emitting device, so that the light emitting efficiency of the light emitting device 31 is improved, and the power consumption of the display panel is reduced.
Fig. 3 is a schematic view of a light path in which light is refracted and reflected at an interface where the filter unit and the black matrix contact each other. As shown in fig. 3, the filter unit 60 contacts the first sidewall B1 of the first opening K1 of the black matrix 50. The light emitted from the filter unit 60 toward the black matrix 50 is reflected and refracted at the first sidewall B1, wherein the incident angle is i1Angle of refraction i2. With the refractive index of the filter unit 60 being n1The black matrix 50 has a refractive index n2Taking an example, the following equation can be obtained:
reflection coefficient ═ n1＇*cosi1-n2＇*cosi2/n1＇*cosi1+n2＇*cosi2|2；
Refractive index ═ 2n1＇*cosi1/n1＇*cosi1+n2＇*cosi2|2。
With n2For example, when n is equal to 1.71Angle of incidence i ═ 1.21At 45 °, the reflected light accounts for about 48%, and as the angle of incidence increases, the proportion of reflected light increases and the proportion of refracted light decreases. When the incident angle i1When the angle is more than 65 degrees, the reflected light can account for more than 70 percent. It can be seen that increasing the difference in refractive index between the black matrix 50 and the filter unit 60 in contact therewith can increase the proportion of reflected light.
In some embodiments, fig. 4 is a schematic partial top view of another display panel according to the embodiments of the present invention, and fig. 5 is a schematic cross-sectional view taken along line B-B' of fig. 4. As seen in conjunction with fig. 4 and 5, the filter unit 60 includes a first filter portion 61 and a second filter portion 62; in the first direction x, the first filter portion 61 contacts with the side wall of the first opening K1, and the second filter portion 62 is located on the side of the first filter portion 61 away from the side wall of the first opening K1; that is, the first side wall B1 is in contact with the first filter portion 61, and the second side wall B2 is also in contact with the first filter portion 61. The refractive index of the first optical filter portion 61 is smaller than that of the second optical filter portion 62. By such an arrangement, the refractive index difference between the black matrix 50 and the filter unit 60 in contact with the black matrix can be made larger, the ratio of the reflected light when the light is reflected and refracted on the first side wall B1 can be increased, and the ratio of the reflected light when the light is reflected and refracted on the second side wall B2 can also be increased, that is, the light quantity absorbed by the black matrix 50 can be reduced, so that the more the light quantity reflected by the first side wall B1 and emitted to the second side wall B2 is, the more the light quantity reflected by the second side wall B2 and emitted to the display panel can be obtained, and the light extraction efficiency of the light emitting device 31 can be further improved.
In the process for manufacturing the optical filter unit 60, by adjusting the process conditions such as the film formation speed and doping of the optical filter unit 60, the density and the rule of crystal deposition in the optical filter unit 60 can be controlled, and the first optical filter portion 61 and the second optical filter portion 62 having different refractive indices can be manufactured. Alternatively, the crystal density of the part of the filter unit 60 in contact with the black matrix 50 may be reduced, and the refractive index of the part of the filter unit 60 may be reduced, thereby obtaining the first filter portion 61 having a smaller refractive index.
In some embodiments, the center of the filter unit 60 in the first direction x is located within the second filter portion 62. As shown in fig. 5, a virtual straight line X1 parallel to the first direction X traverses the filter unit 60, and the centers of two end points of the filter unit 60 that are farthest from the virtual straight line X1 may be understood as the center of the filter unit 60 in the first direction X. This embodiment reduces only the refractive index of the first filter portion 61 in contact with the first side wall B1 and the second side wall B2, respectively, and the refractive index of the second filter portion 62 opposite to the central area of the light emitting device 31 in the plane direction e perpendicular to the substrate 10 is larger, so that the difference in refractive index between the second filter portion 62 and the film layer in contact with the side of the second filter portion 62 close to the substrate 10 is not too large, and thus it is possible to ensure that most of the light emitted from the light emitting device 31 is still emitted out of the display panel through the second filter portion 62 having a larger refractive index, and ensure that the light transmittance at the corresponding position of the central area of the light emitting device 31 is larger.
In the embodiment of the present invention, the refractive index of the first optical filter portion 61 is n1, and the refractive index of the second optical filter portion 62 is n 2; wherein 1.1< n1< n2< 1.45. In the manufacturing process of the optical filter unit 60, by adjusting the process conditions of the optical filter unit 60, such as the film forming speed, doping, etc., the compactness and regularity of the crystal deposition of the optical filter unit 60 can be controlled, so that the refractive index of the first optical filter portion 61 is smaller than that of the second optical filter portion 62, and the first side wall B1 and the second side wall B2 are respectively in contact with the first optical filter portion 61. The refractive index difference between the black matrix 50 and the filter unit 60 in contact therewith can be increased, the ratio of reflected light can be increased, and the light extraction efficiency of the light emitting device 31 can be improved. Meanwhile, the difference of the refractive index between the second filter part 62 and the film layer contacting with one side of the substrate 10 is not too large, so that most of the light emitted by the light emitting device 31 is still emitted out of the display panel through the second filter part 62, and the light transmittance at the corresponding position of the central area of the light emitting device 31 is ensured to be relatively large.
In one embodiment, n1 is 1.2 and n2 is 1.4.
As shown in fig. 5, in the first direction x, the length L1 of the first filter portion 61, the total length of the filter unit 60 in the first opening K1 is L0; L1/L0 is less than or equal to 0.05. Wherein, a virtual straight line X1 parallel to the first direction X traverses the filter unit 60, and the distance between two end points of the filter unit 60 that are farthest away from the intersection of the virtual straight line X1 is defined as the total length of the filter unit 60 in the first direction X is L0; similarly, a virtual straight line X1 crosses the first filter portion 61, and the distance between the two end points of the first filter portion 61 that intersect the virtual straight line X1 and are farthest from each other is defined as the length L1 of the first filter portion 61. The length of the first filter portion 61 in contact with the first side wall B1 and the length of the second filter portion 62 in contact with the second side wall B2 may or may not be equal in the first direction x. In this embodiment, the ratio of the length of the first filter portion 61 to the total length of the filter unit 60 is small, that is, the ratio of the reflected light when the light emitted from the filter unit 60 to the black matrix 50 is reflected and refracted can be increased by only reducing the refractive index of the small portion of the filter unit 60 contacting with the sidewall of the first opening K1, thereby improving the light extraction efficiency of the light emitting device 31. In addition, with such an arrangement, the adjustment and control manner of the process parameters during the manufacture of the filtering unit 60 is simplified, the process time is shortened, and the manufacturing cost is reduced.
In some embodiments, 0.02 ≦ L1/L0 ≦ 0.05.
In some embodiments, as shown in fig. 4, the first filter portion 61 is disposed around the second filter portion 62. That is, the side walls around the first opening K1 are in contact with the first filter portion 61. This embodiment enables designing the inclination angles of the side walls at the respective different positions thereof in conjunction with the shape of the first opening K1, as illustrated in fig. 4, the extension direction of the tangent line B-B' being the direction x in which the first side wall B1 and the second side wall B2 are disposed opposite to each other; two side walls opposite in the direction y are also provided as the first side wall B1 and the second side wall B2, respectively. Any set of the first side wall B1 and the second side wall B2 opposite to each other can cooperate with each other to make part of the light emitted from the light emitting device 31 emit out of the display panel after being reflected for multiple times, so that the light emitting efficiency of the light emitting device 31 is improved.
In some embodiments, illustrated in the case where the shape of the light emitting device 31 is substantially rectangular, the shape of the first opening K1 is the same as the shape of the light emitting device 31. As shown in fig. 4, the length of the first side wall B1 and the length of the second side wall B2 are substantially equal in a direction surrounding the first opening K1. As illustrated in fig. 4, the four side walls of the first opening K1 include two first side walls B1 and two second side walls B2, and the first side walls B1 and the second side walls B2 are opposite. Each sidewall of the first opening K1 can be utilized to further improve the light extraction efficiency of the light emitting device 31.
In another embodiment, fig. 6 is a partial schematic top view of another display panel according to an embodiment of the present invention, and as shown in fig. 6, the shape of the light emitting device 31 in the display panel is approximately circular, and the shape of the first opening K1 of the black matrix 50 is substantially the same as the shape of the light emitting device 31. The left side of the dotted line illustrated in fig. 6 is the second side wall B2, and the right side is the first side wall B1. The length of the first side wall B1 and the length of the second side wall B2 are substantially equal in the direction around the first opening K1. The sidewalls of the first opening K1 at various positions can be utilized to further improve the light extraction efficiency of the light emitting device 31.
In some embodiments, fig. 7 is a schematic cross-sectional view of another display panel provided in the embodiments of the present invention, as shown in fig. 7, the display layer 30 further includes a pixel defining layer 32, the pixel defining layer 32 is used for spacing adjacent light emitting devices 31, the pixel defining layer 32 includes a plurality of second openings K2, and the light emitting devices 31 are located in the second openings K2; an included angle formed by the side wall of the second opening K2 and the plane of the substrate 10 and facing the inside of the second opening K2 is theta 3, and the theta 3 is an obtuse angle; wherein theta 2 is more than or equal to theta 3. So set up and to guarantee that the partial wide-angle light that jets out along second opening K2 lateral wall can jet out through the first opening K1 of black rectangle 50, avoided second lateral wall B2 to shelter from wide-angle light, guaranteed emitting device 31's luminous efficacy.
In one embodiment, θ 2 — θ 3. The inclination angle of the second sidewall B2 is designed according to the inclination angle θ 3 of the pixel defining layer 32, so that the second sidewall B2 is prevented from shielding the large-angle light, and the light emitting efficiency of the light emitting device 31 is ensured.
Fig. 8 is a simplified schematic diagram of another display panel according to an embodiment of the present invention, and fig. 8 only shows the substrate 10, the light emitting surface M of the light emitting device 31 on the side away from the substrate 10, the black matrix 50, and the filtering unit 60 in a simplified schematic diagram. As shown in fig. 8, one end of the light emitting face M of the light emitting device 31 away from the first side wall B1 in the first direction x is a first end C, which is the largest distance from the first side wall B1 among the respective positions of the light emitting face M in the first direction x. The end of the first side wall B1 near the substrate 10 is a second end D. The light emitted from the first end C is emitted to the second end D, then reflected by the first sidewall B1, transmitted through the filter unit 60, emitted to the second sidewall B2, and then reflected by the second sidewall B2 to exit the display panel. The light path illustrated in fig. 8 is a critical light ray that can be reflected by the first side wall B1 and the second side wall B2 in sequence and then exit the display panel.
Wherein, the distance between the first end C and the second end D in the first direction x is D, and the distance between the light emitting surface M of the light emitting device and the black matrix 50 in the plane direction e perpendicular to the substrate 10 is h, then tan ═ 1 ═ h/D. In addition, the angle 1 is equal to 2, 2 is equal to 3 is equal to 2, and the angle 3 +. theta 1 is equal to 90 deg. θ 1 ═ 90 ° -1/2 × arctan (h/d) can be obtained. When θ 1 satisfies this condition, the light emitted from the first end C to the second end D can be reflected by the first sidewall B1, propagate in the filter unit 60 in the first direction x, and be emitted to the second sidewall B2. The light emitted from the light emitting point (such as the point E shown in fig. 7) with a smaller distance from the second end D in the first direction x has a larger incident angle toward the second end D, and the corresponding reflection angle is also larger, so that the light is easier to be reflected by the second sidewall B2 and then exits the display panel, which contributes to the light emission of the light emitting device.
In some embodiments, 100 to 1/2 star (h/d). ltoreq.θ 1. ltoreq.80 to 1/2 star (h/d). The size of θ 1 is set to satisfy a certain range, so that relatively more light rays can be emitted out of the display panel after being reflected by the first side wall B1 and the second side wall B2 to contribute to the light emission of the light emitting device while ensuring that the shape of the first side wall B1 is easy to manufacture, thereby improving the light emission efficiency of the light emitting device and reducing the power consumption.
In some embodiments, the encapsulation layer 40 and the optical cement are disposed between the display layer 30 and the black matrix 50, and the distance h from the light emitting surface M of the light emitting device to the black matrix 50 in the direction e perpendicular to the plane of the substrate 10 is the sum of the thickness of the second electrode c above the light emitting surface M, the thickness of the encapsulation layer 40, and the thickness of the optical cement layer.
In some embodiments, a touch layer is further included between the encapsulation layer 40 and the black matrix 50, and the thickness of the touch layer is also accumulated when calculating h.
In some embodiments, the first opening K1 includes n first sidewalls B1 and n second sidewalls B2, n is an integer and n ≧ 3, and the first sidewalls B1 and the second sidewalls B2 are spaced apart in a direction around the first opening K1. Taking n-3 as an example, fig. 9 is a partial schematic top view of another display panel provided in the embodiment of the present invention, as shown in fig. 9, a shape of the light emitting device 31 is close to a hexagon, and a shape of the first opening K1 of the black matrix 50 is substantially the same as a shape of the light emitting device 31. The first side wall B1 and the second side wall B2 are provided at intervals in a direction surrounding the first opening K1. This arrangement enables the first side wall B1 and the second side wall B2 to be arranged in an opposed and grouped manner. As can be seen from the above description of the embodiment of fig. 2, in the first side wall B1 and the second side wall B2 which are oppositely disposed, the inclination angle of the first side wall B1 and the inclination angle of the second side wall B2 are matched with each other, so that part of the light emitted by the light emitting device 31 is emitted out of the display panel after being reflected by the first side wall B1 and the second side wall B2 in sequence, thereby improving the light extraction efficiency of the light emitting device 31. In this embodiment, the first side wall B1 and the second side wall B2 are provided at an interval, and the uniformity of light emitted from the light-emitting device 31 in each direction can be improved.
In some embodiments, n is 4 or 5, and the first side wall B1 and the second side wall B2 are spaced apart in a direction surrounding the first opening K1. Which are not illustrated in the drawings.
Fig. 10 is a schematic view of a display device according to an embodiment of the present invention, and as shown in fig. 10, the display device includes a display panel 100 according to any embodiment of the present invention. The structure of the display panel 100 is already described in the above embodiments, and is not described herein again. The display device provided by the embodiment of the invention is any equipment with a display function, such as a mobile phone, a tablet computer, a notebook computer, an electronic book, a television, an intelligent watch and the like.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like made within the spirit and principle of the present invention should be included in the scope of the present invention.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.
Claims (11)
1. A display panel, comprising:
a substrate;
a display layer on one side of the substrate; the display layer includes a plurality of light emitting devices,
the black matrix is positioned on one side of the display layer far away from the substrate; the black matrix is provided with a plurality of first openings, and the first openings are overlapped with the light-emitting devices in the direction perpendicular to the plane of the substrate; the first opening comprises a first side wall and a second side wall which are opposite in a first direction, and the first direction is parallel to the plane of the substrate;
an included angle formed by the first side wall and the plane where the substrate is located and facing the inside of the first opening is theta 1, an included angle formed by the second side wall and the plane where the substrate is located and facing the inside of the first opening is theta 2, wherein theta 1 is less than 90 degrees, and theta 2 is greater than 90 degrees.
2. The display panel according to claim 1,
the display panel further comprises a light filtering unit, the light filtering unit is positioned on one side of the display layer far away from the substrate, and at least part of the light filtering unit is positioned in the first opening and is in contact with the side wall of the first opening;
the optical filter unit comprises a first optical filter part and a second optical filter part; in the first direction, the first optical filter part is contacted with the side wall of the first opening, and the second optical filter part is positioned on one side of the first optical filter part far away from the side wall of the first opening;
the first filter portion has a refractive index smaller than that of the second filter portion.
3. The display panel according to claim 2,
the center of the filter unit in the first direction is located within the second filter portion.
4. The display panel according to claim 3,
a length L1 of the first optical filter portion in the first direction, a total length of the optical filter unit in the first opening being L0; L1/L0 is less than or equal to 0.05.
5. The display panel according to claim 2,
the refractive index of the first filter portion is n1, and the refractive index of the second filter portion is n 2; wherein 1.1< n1< n2< 1.45.
6. The display panel according to claim 2,
the first filtering portion is disposed around the second filtering portion.
7. The display panel according to claim 1,
the display layer further comprises a pixel defining layer comprising a plurality of second openings in which the light emitting devices are located;
an included angle formed by the side wall of the second opening and the plane of the substrate and facing the inside of the second opening is theta 3, wherein theta 2 is larger than or equal to theta 3.
8. The display panel according to claim 1,
100-1/2-theta 1 not more than 80-1/2-octan (h/d), wherein,
the distance between the light-emitting surface of the light-emitting device and the black matrix in the direction vertical to the plane where the substrate is located is h;
in the first direction, one end, away from the first side wall, of a light emitting surface of the light emitting device is a first end, one end, close to the substrate, of the first side wall is a second end, and the distance between the first end and the second end in the first direction is d.
9. The display panel according to claim 1,
the length of the first sidewall and the length of the second sidewall are equal in a direction around the first opening.
10. The display panel according to claim 1,
the first opening comprises n first side walls and n second side walls, n is an integer and is not less than 3, and the first side walls and the second side walls are arranged at intervals in the direction surrounding the first opening.
11. A display device characterized by comprising the display panel according to any one of claims 1 to 10.
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