CN114242915B - Display panel and display device - Google Patents
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- CN114242915B CN114242915B CN202111562999.5A CN202111562999A CN114242915B CN 114242915 B CN114242915 B CN 114242915B CN 202111562999 A CN202111562999 A CN 202111562999A CN 114242915 B CN114242915 B CN 114242915B
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- 239000000758 substrate Substances 0.000 claims abstract description 51
- 239000011159 matrix material Substances 0.000 claims abstract description 42
- 238000001914 filtration Methods 0.000 claims description 19
- 239000010410 layer Substances 0.000 description 47
- 238000005538 encapsulation Methods 0.000 description 10
- 230000003287 optical effect Effects 0.000 description 10
- 238000000034 method Methods 0.000 description 6
- 230000008569 process Effects 0.000 description 6
- 238000010586 diagram Methods 0.000 description 5
- 230000000694 effects Effects 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 4
- 239000013078 crystal Substances 0.000 description 3
- 230000008021 deposition Effects 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 238000002834 transmittance Methods 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 238000010420 art technique Methods 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
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- 239000003086 colorant Substances 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 239000012044 organic layer Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-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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- Microelectronics & Electronic Packaging (AREA)
- Electroluminescent Light Sources (AREA)
Abstract
The embodiment of the invention provides a display panel and a display device. The display panel includes: a substrate; a display layer located 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 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 of the substrate facing the inside of the first opening is theta 1, and an included angle formed by the second side wall and the plane of the substrate facing the inside of the first opening is theta 2, wherein theta 1<90 degrees and theta 2>90 degrees. The invention can improve the light-emitting efficiency of the light-emitting device and reduce the power consumption.
Description
Technical Field
The present invention relates to the field of display technologies, and in particular, to a display panel and a display device.
Background
In a display device, reflection of ambient light by a display screen can seriously affect the display effect. One prior art technique utilizes a filter layer to reduce reflection of ambient light by a display screen, the filter layer is disposed above a light emitting device, the filter layer includes a filter unit and a black matrix, and the black matrix is used to limit the filter units of different colors. The arrangement of the filter layer can affect the light-emitting efficiency of the light-emitting device, and power consumption is increased.
Disclosure of Invention
The embodiment of the invention provides a display panel and a display device, which are used for solving 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 located on one side of the substrate; the display layer comprises a plurality of light emitting devices,
a black matrix on a side of the display layer 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 of the substrate facing the inside of the first opening is theta 1, and an included angle formed by the second side wall and the plane of the substrate facing the inside of the first opening is theta 2, wherein theta 1<90 degrees and theta 2>90 degrees.
In a second aspect, an embodiment of the present invention further provides a display apparatus, including a display panel provided by any one of the embodiments 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 a certain inclination angle, and the inclination directions of the two opposite side walls are different. The first side wall and the plane of the substrate form an included angle which faces the inside of the first opening and is smaller than 90 degrees, and the second side wall and the plane of the substrate form an included angle which faces the inside of the first opening and is larger than 90 degrees. The first side wall and the second side wall can be matched with each other, and part of light rays emitted by the light-emitting device can be finally emitted out of the display panel after being reflected on the first side wall and the second side wall in sequence, so that the light-emitting efficiency of the light-emitting device is improved, and the power consumption of the display panel is reduced.
Drawings
In order to more clearly illustrate the embodiments of the invention or the technical solutions of the prior art, the drawings which are used in the description of the embodiments or the prior art will be briefly described, it being obvious that the drawings in the description below are some embodiments of the invention and that other drawings can be obtained according to these drawings without inventive faculty for a person skilled in the art.
Fig. 1 is a schematic partial top view of a display panel according to an embodiment of the invention;
FIG. 2 is a schematic cross-sectional view taken at the location of line A-A' in FIG. 1;
FIG. 3 is a schematic view of the light path of light refracted and reflected at the interface where the filter element and the black matrix contact 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 at the location of line B-B' in FIG. 4;
FIG. 6 is a schematic top view of a portion of another display panel according to an embodiment of the invention;
FIG. 7 is a schematic cross-sectional view of another display panel according to an embodiment of the present invention;
FIG. 8 is a simplified schematic diagram of another display panel according to an embodiment of the invention;
FIG. 9 is a schematic partial top view of another display panel according to an embodiment of the invention;
fig. 10 is a schematic diagram of a display device according to an embodiment of the invention.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent that the described embodiments are some embodiments of the present invention, but not all embodiments of the present invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the 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 this application 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 arranged above a display layer, and reflection of the display screen to ambient light is reduced by utilizing a filter unit in the filter layer. The filter unit comprises a red filter unit, a green filter unit and a blue filter unit. Taking red light in ambient light as an example, the red light can penetrate through the red filter unit to irradiate on 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 be emitted out of the display panel, so that the red light cannot be recognized by human eyes, and the reflection of the display panel to the ambient light can be reduced. But still including the black matrix that is used for spacing adjacent filter unit in the filter layer, the black matrix has shading characteristic, can shelter from the wide-angle light that light emitting device sent, and the part wide-angle light that light emitting device sent that is to say can not jettisoned display panel to influence light emitting device's luminous efficacy, reduced display panel luminance, increased the consumption.
In order to solve the problems in the prior art, the embodiment of the invention provides a display panel, which is characterized in that the shape of the side wall of an opening of a black matrix is designed, and partial light rays are reflected by the side wall of the opening of the black matrix, so that the reflected light rays can finally be emitted out of the display panel to contribute to the light emission of a light emitting device, thereby improving the light emitting efficiency of the light emitting device and reducing the power consumption.
Fig. 1 is a schematic top view of a display panel according to an embodiment of the invention, and fig. 2 is a schematic cross-sectional view of the display panel at a position of a line A-A' in fig. 1.
As shown in fig. 1, the display panel includes a black matrix 50, the black matrix 50 having a plurality of first openings K1, the first openings K1 overlapping the light emitting devices 31 as seen in a top view.
As shown in fig. 2, the display panel includes a substrate 10, and a driving layer 20, a display layer 30, an encapsulation layer 40, a black matrix 50, and a filter unit 60 are all located on the same side of the substrate 10. Wherein,
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 located 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 the first electrode a and the second electrode c are respectively applied with voltages, 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 for driving the light emitting device 31 to emit light.
The encapsulation layer 40 is located at a side of the display layer 30 remote from the substrate 10, and the encapsulation layer 40 serves to insulate water oxygen to ensure the service life of the light emitting device 31. In some embodiments, encapsulation layer 40 comprises encapsulation glass. In some embodiments, encapsulation layer 40 includes at least one inorganic layer and at least one organic layer.
The black matrix 50 is located at a side of the display layer 30 remote from the substrate 10, and the black matrix 50 is located at a side of the encapsulation layer 40 remote from the display layer 30. As can be seen from fig. 2, the first opening K1 overlaps the light emitting device 31 in a direction e perpendicular to the plane in which the substrate 10 lies. Wherein one light emitting device 31 corresponds to one first opening K1.
At least a portion of the filter unit 60 is located in the first opening K1 and contacts with 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 filter unit 60 further includes a white filter unit. The filter unit 60 is disposed on the side of the display layer 30 away from the substrate 10, so that reflection of ambient light by the display panel can be reduced, and display effect of the display panel can be improved.
In fig. 2, a first direction x parallel to the plane of the substrate 10 is shown, and the first opening K1 comprises a first side wall B1 and a second side wall B2 opposite in the first direction x. It can be seen that the filter unit 60 is in contact with both the first sidewall B1 and the second sidewall B2. An included angle formed by the plane of the first side wall B1 and the substrate 10 and facing the inside of the first opening K1 is theta 1, and an included angle formed by the plane of the second side wall B2 and the substrate 10 and facing the inside of the first opening K1 is theta 2, wherein theta 1<90 degrees and theta 2>90 degrees.
In the display panel, the black matrix 50 has a refractive index, although having a light shielding property, wherein the refractive index of the black matrix 50 is greater than that of the filter unit 60. As shown in the light path diagram of fig. 2, the light emitted from the light emitting layer B to the first sidewall B1 is emitted to the black matrix 50 by the light filtering unit 60, the light reflected by the first sidewall B1 can be reflected on the first sidewall B1, and the light continuously propagates in the light filtering unit 60 and then is emitted to the second sidewall B2, and the light is reflected again by the second sidewall B2 to change direction and be emitted to a side far from the substrate 10, thereby improving the light emitting efficiency of the light emitting device 31.
In the embodiment of the present invention, two opposite sidewalls of the first opening K1 where the black matrix 50 is disposed in the first direction x have a certain inclination angle, and the inclination directions of the opposite sidewalls are different. The first sidewall B1 forms an angle with the plane of the substrate 10 towards the inside of the first opening K1 smaller than 90 °, and the second sidewall B2 forms an angle with the plane of the substrate 10 towards the inside of the first opening K1 larger than 90 °. The first sidewall B1 and the second sidewall B2 can be mutually matched, and part of light emitted by the light emitting device can be finally emitted out of the display panel after being reflected on the first sidewall B1 and the second sidewall B2 in sequence, so that contribution is made to light emission of the light emitting device, light emitting efficiency of the light emitting device 31 is improved, and power consumption of the display panel is reduced.
Fig. 3 is a schematic view of an optical path in which light is refracted and reflected at an interface where the filter unit and the black matrix are in contact with each other. As shown in fig. 3, the filter unit 60 is in contact with the first sidewall B1 of the first opening K1 of the black matrix 50. The light rays emitted from the filter unit 60 to the black matrix 50 are reflected and refracted by the first sidewall B1, wherein the incident angle is i 1 Angle of refraction i 2 . With refractive index n of the filter unit 60 1 ' the refractive index of the black matrix 50 is n 2 As an example, the following formula can be obtained:
reflection coefficient= |n 1 ＇*cosi 1 -n 2 ＇*cosi 2 /n 1 ＇*cosi 1 +n 2 ＇*cosi 2 | 2 ；
Refractive index= |2n 1 ＇*cosi 1 /n 1 ＇*cosi 1 +n 2 ＇*cosi 2 | 2 。
With n 2 ' 1.7 is taken as an example, when n 1 ' 1.2 incidence angle i 1 At 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 incident angle i 1 When the angle is larger than 65 degrees, the reflected light can occupy more than 70 percent. It can be seen that increasing the refractive index difference between the black matrix 50 and the filter unit 60 in contact therewith can increase the duty ratio of the reflected light.
In some embodiments, fig. 4 is a schematic top view of a portion of another display panel according to an embodiment of the present invention, and fig. 5 is a schematic cross-sectional view at a position of a line B-B' in fig. 4. As seen in 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 61 contacts with the sidewall of the first opening K1, and the second filter 62 is located at one side of the sidewall of the first filter 61 away from the first opening K1; that is, the first sidewall B1 is in contact with the first filter 61, and the second sidewall B2 is also in contact with the first filter 61. Wherein, the refractive index of the first filter portion 61 is smaller than that of the second filter portion 62. By such arrangement, the refractive index difference between the black matrix 50 and the filter unit 60 in contact with the black matrix is 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 be increased, that is, the light quantity absorbed by the black matrix 50 can be reduced, and the more light quantity reflected by the first side wall B1 and emitted to the second side wall B2 can be emitted to the display panel after being reflected by the second side wall B2, so that the light emitting efficiency of the light emitting device 31 is further improved.
In the process of manufacturing the filter unit 60, the density and the rule of crystal deposition of the filter unit 60 can be controlled by adjusting the process conditions such as the film forming speed and doping of the filter unit 60, and the first filter portion 61 and the second filter portion 62 having different refractive indexes can be manufactured. Alternatively, the crystal compactness of the partial filter unit 60 in contact with the black matrix 50 is reduced, and the refractive index of the partial filter unit 60 can be reduced, resulting in 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 crosses the filter unit 60, and the center of the two end points of the filter unit 60, which 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 only reduces the refractive index of the first filter portion 61 contacting the first sidewall B1 and the second sidewall B2, respectively, while the refractive index of the second filter portion 62 opposite to the central region of the light emitting device 31 in the plane direction e perpendicular to the substrate 10 is larger, so that the refractive index difference between the second filter portion 62 and the film layer contacting the side thereof close to the substrate 10 is not too large, thereby being able to ensure that most of the light emitted from the light emitting device 31 still exits the display panel through the second filter portion 62 having the larger refractive index, and ensuring that the light transmittance at the position corresponding to the central region of the light emitting device 31 is larger.
In the embodiment of the present invention, the refractive index of the first filter portion 61 is n1, and the refractive index of the second filter portion 62 is n2; wherein 1.1< n1< n2<1.45. In the process of manufacturing the optical filter unit 60, by adjusting the film forming speed, doping, and other process conditions of the optical filter unit 60, the compactness and the regularity of 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 sidewall B1 and the second sidewall B2 are respectively contacted 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 duty ratio of the reflected light can be increased, and the light emitting efficiency of the light emitting device 31 can be improved. Meanwhile, the refractive index difference between the second filter portion 62 and the film layer contacted with the side, close to the substrate 10, of the second filter portion is not too large, most of light rays emitted by the light emitting device 31 are emitted out of the display panel after passing through the second filter portion 62, and the light transmittance of the corresponding position of the central area of the light emitting device 31 is large.
In one embodiment, n1=1.2, n2=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 crosses the filter unit 60, and a distance between two end points of the filter unit 60 intersecting the virtual straight line X1 at a farthest distance is defined as a total length of the filter unit 60 in the first direction X being L0; similarly, the virtual straight line X1 crosses the first filter portion 61, and the distance between the two end points at which the first filter portion 61 intersects the virtual straight line X1 at the farthest distance is defined as the length L1 of the first filter portion 61. The length of the first filter portion 61 contacting the first sidewall B1 and the length of the second filter portion 62 contacting the second sidewall B2 may be equal or different in the first direction x. In this embodiment, the length of the first filter portion 61 occupies a relatively small proportion of the total length of the filter unit 60, that is, only a small portion of the filter unit 60 contacting the sidewall of the first opening K1 is reduced in refractive index, so that the proportion of reflected light when the light emitted from the filter unit 60 to the black matrix 50 is reflected and refracted can be increased, thereby improving the light extraction efficiency of the light emitting device 31. And the arrangement simplifies the mode of regulating and controlling the process parameters when the filter unit 60 is manufactured, shortens the process time and reduces the manufacturing cost.
In some embodiments, 0.02.ltoreq.L1/L0.ltoreq.0.05.
In some embodiments, as shown in fig. 4, the first filter portion 61 is disposed around the second filter portion 62. I.e. the side walls around the first opening K1 are all in contact with the first filter portion 61. In this embodiment, the inclination angles of the side walls at different positions of the first opening K1 can be designed in combination with the shape of the first opening K1, and as illustrated in fig. 4, the extending direction of the tangent line B-B' is 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 opposing in the direction y are also provided as a first side wall B1 and a second side wall B2, respectively. Any one of the opposite first side wall B1 and the second side wall B2 can cooperate with each other to make a part of light emitted by the light emitting device 31 emit out of the display panel after being reflected for multiple times, thereby improving the light emitting efficiency of the light emitting device 31.
In some embodiments, illustrated with the shape of the light emitting device 31 being 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 sidewall B1 and the length of the second sidewall B2 are substantially equal in a direction surrounding the first opening K1. In fig. 4, two first sidewalls B1 and two second sidewalls B2 are included in four sidewalls of the first opening K1, and the first sidewalls B1 and the second sidewalls B2 are opposite. Each sidewall of the first opening K1 can be utilized to further enhance the light emitting efficiency of the light emitting device 31.
In another embodiment, fig. 6 is a schematic partial top view of another display panel according to an embodiment of the present invention, 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 broken 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 sidewall B1 and the length of the second sidewall B2 are substantially equal in a direction surrounding the first opening K1. The sidewalls at the respective positions of the first opening K1 can be utilized to further enhance the light emitting efficiency of the light emitting device 31.
In some embodiments, fig. 7 is a schematic cross-sectional view of another display panel according to an embodiment 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 theta 3 is an obtuse angle; wherein, theta 2 is more than or equal to theta 3. The arrangement can ensure that part of the large-angle light emitted along the side wall of the second opening K2 can be emitted through the first opening K1 of the black rectangle 50, so that the shielding of the large-angle light by the second side wall B2 is avoided, and the light emitting efficiency of the light emitting device 31 is ensured.
In one embodiment, θ2=θ3. The inclination angle of the second sidewall B2 is designed according to the inclination angle θ3 of the pixel defining layer 32, so that the second sidewall B2 is prevented from shielding the light with a large angle, 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 schematically illustrates the substrate 10, the light emitting surface M of the light emitting device 31 on the side far from the substrate 10, the black matrix 50, and the filter unit 60. As shown in fig. 8, one end of the light emitting surface M of the light emitting device 31 away from the first side wall B1 in the first direction x is the first end C, and the distance of the first end C from the first side wall B1 is largest among the respective positions of the light emitting surface M in the first direction x. One end of the first sidewall B1 near the substrate 10 is a second end D. The light emitted from the first end C is directed to the second end D, reflected by the first sidewall B1, propagates in the filter unit 60, and is directed to the second sidewall B2, and is reflected by the second sidewall B2 to be emitted out of the display panel. The optical path illustrated in fig. 8 is a critical light ray that can be reflected by the first sidewall B1 and the second sidewall B2 in order and then emitted out of the display panel.
Wherein a distance between the first end C and the second end D in the first direction x is D, and a distance between the light emitting surface M of the light emitting device and the black matrix 50 in a direction e perpendicular to the plane of the substrate 10 is h, tan < 1=h/D. In addition, the terms 1= 2,2 = 3 = 2, < 3 ++θ1 = 90 °. θ1=90° -1/2 arctan (h/d) can be obtained. When θ1 satisfies this condition, the light emitted from the first end C toward the second end D can be reflected by the first sidewall B1, propagate in the first direction x in the filter unit 60, and be emitted toward the second sidewall B2. The incident angle of the light emitted from the light emitting point (e.g., point E shown in fig. 7) having a smaller distance from the second end D in the first direction x toward the second end D will be larger, and the corresponding reflection angle will be larger, so that the light is more easily reflected by the second sidewall B2 and then emitted out of the display panel, and the light emitted from the light emitting device will be contributed.
In some embodiments, 100 ° -1/2 x arctan (h/d) θ1 +.80 ° -1/2 x arctan (h/d). The size of the theta 1 is set to meet a certain range, so that the shape of the first side wall B1 is easy to manufacture, and meanwhile, relatively more light rays can be emitted out of the display panel after the reflection action of the first side wall B1 and the second side wall B2 to contribute to the light emission of the light emitting device, so that the light emitting efficiency of the light emitting device can be improved, and the power consumption can be reduced.
In some embodiments, the encapsulation layer 40 and the optical paste 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 plane direction e perpendicular to 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 paste 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 needs to be 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.gtoreq.3, and the first sidewalls B1 and the second sidewalls B2 are spaced apart in a direction surrounding the first opening K1. Taking n=3 as an example, fig. 9 is a schematic partial top view of another display panel according to an embodiment of the present invention, as shown in fig. 9, the shape of the light emitting device 31 is close to a hexagon, 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 first sidewall B1 and the second sidewall B2 are spaced apart in a direction surrounding the first opening K1. The arrangement is such that the first side wall B1 and the second side wall B2 are opposed and arranged in groups. 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 that are disposed oppositely, 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 a portion of the light emitted from the light emitting device 31 is emitted out of the display panel after passing through the reflection effect of the first side wall B1 and the reflection effect of the second side wall B2 in sequence, thereby improving the light emitting efficiency of the light emitting device 31. In this embodiment, the first side wall B1 and the second side wall B2 are provided at intervals, and uniformity of light emitted from the light emitting device 31 in each direction can be improved.
In some embodiments, n=4 or 5, and the first sidewall B1 and the second sidewall B2 are spaced apart in a direction surrounding the first opening K1. The figures are not illustrated here.
Fig. 10 is a schematic diagram 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 will not be described here again. The display device provided by the embodiment of the invention is any device with a display function, such as a mobile phone, a tablet computer, a notebook computer, an electronic paper book, a television, a smart watch and the like.
The foregoing description of the preferred embodiments of the invention is not intended to be limiting, but rather to enable any modification, equivalent replacement, improvement or the like to be made within the spirit and principles of the invention.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present invention, and not for limiting the same; although the invention has been described in detail with reference to the foregoing embodiments, those skilled in the art will appreciate that: the technical scheme described in the foregoing embodiments can be modified or some or all of the technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the invention.
Claims (11)
1. A display panel, the display panel comprising:
a substrate;
a display layer located on one side of the substrate; the display layer comprises a plurality of light emitting devices,
a black matrix located on a side of the display layer 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, 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<90 degrees and theta 2>90 degrees.
2. The display panel of claim 1, wherein the display panel comprises,
the display panel further comprises a light filtering unit, wherein the light filtering unit is positioned on one side of the display layer away from the substrate, and the light filtering unit is at least partially positioned in the first opening and is in contact with the side wall of the first opening;
the light filtering unit comprises a first light filtering part and a second light filtering part; in the first direction, the first light filtering part is contacted with the side wall of the first opening, and the second light filtering part is positioned at one side of the side wall of the first light filtering part away from the first opening;
the refractive index of the first filtering part is smaller than that of the second filtering part.
3. The display panel of claim 2, wherein the display panel comprises,
the center of the filter unit in the first direction is located in the second filter part.
4. The display panel according to claim 3, wherein,
in the first direction, the length L1 of the first filtering portion, and the total length of the filtering unit in the first opening is L0; L1/L0 is less than or equal to 0.05.
5. The display panel of claim 2, wherein the display panel comprises,
the refractive index of the first filtering part is n1, and the refractive index of the second filtering part is n2; wherein 1.1< n1< n2<1.45.
6. The display panel of claim 2, wherein the display panel comprises,
the first light filtering part is arranged around the second light filtering part.
7. The display panel of claim 1, wherein the display panel comprises,
the display layer further includes a pixel definition layer including a plurality of second openings, the light emitting devices being located within the second openings;
and an included angle formed by the side wall of the second opening and the plane of the substrate facing the inside of the second opening is theta 3, wherein theta 2 is more than or equal to theta 3.
8. The display panel of claim 1, wherein the display panel comprises,
100 ° -1/2 x arctan (h/d) θ1-80 ° -1/2 x arctan (h/d), wherein,
the distance from the light emitting surface of the light emitting device to the black matrix in the direction perpendicular to the plane of the substrate is h;
one end, away from the first side wall, of the light emitting surface of the light emitting device in the first direction is a first end, one end, close to the substrate, of the first side wall is a second end, and a distance between the first end and the second end in the first direction is d.
9. The display panel of claim 1, wherein the display panel comprises,
the length of the first side wall and the length of the second side wall are equal in a direction surrounding the first opening.
10. The display panel of claim 1, wherein the display panel comprises,
the first opening comprises n first side walls and n second side walls, n is an integer, n is more than or equal to 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 comprising the display panel according to any one of claims 1 to 10.
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