CN115498124A - Display panel and display device - Google Patents
Display panel and display device Download PDFInfo
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- CN115498124A CN115498124A CN202210873707.8A CN202210873707A CN115498124A CN 115498124 A CN115498124 A CN 115498124A CN 202210873707 A CN202210873707 A CN 202210873707A CN 115498124 A CN115498124 A CN 115498124A
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Abstract
The present disclosure provides a display panel and a display device. The display panel includes: the display panel comprises a substrate, a plurality of sub-pixels arranged on the substrate and a peep-proof structure arranged inside the display panel, wherein each sub-pixel comprises: the pixel electrode and the organic light emitting layer are arranged in a stacking mode along the direction far away from the substrate, the orthographic projection of the peep-proof structure on the substrate is located on the outer side of the orthographic projection of the organic light emitting layer on the substrate or overlapped with the edge area of the orthographic projection of the organic light emitting layer on the substrate, the peep-proof structure is a light absorption structure, and the peep-proof structure is used for blocking light emitting of the sub-pixels at a viewing angle larger than 90 degrees in the set direction. The display panel can realize the peep-proof function and has smaller thickness.
Description
Technical Field
The disclosure belongs to the technical field of display, and particularly relates to a display panel and a display device.
Background
This section is intended to provide a background or context to the embodiments recited in the claims. The description herein is not admitted to be prior art by inclusion in this section.
In a conventional anti-peeping display device, an anti-peeping film is attached to a light-emitting surface of a display panel. The peep-proof film can inhibit the small-visual-angle light emission and the large-visual-angle light emission of the display panel, and the thickness of the display module is increased.
Disclosure of Invention
The present disclosure provides a display panel and a display device.
The technical scheme adopted by the disclosure is as follows: a display panel, comprising: the display panel comprises a substrate, a plurality of sub-pixels arranged on the substrate and a peep-proof structure arranged inside the display panel, wherein each sub-pixel comprises: the pixel electrode and the organic light emitting layer are stacked along the direction far away from the substrate, the orthographic projection of the peep-proof structure on the substrate is positioned on the outer side of the orthographic projection of the organic light emitting layer on the substrate or overlapped with the edge area of the orthographic projection of the organic light emitting layer on the substrate, the peep-proof structure is a light absorption structure, and the peep-proof structure is used for blocking the light emission of the sub-pixels at a viewing angle larger than 90 degrees in a set direction.
In some embodiments, the privacy feature comprises: the black pixel definition layer is arranged on the substrate and surrounds the organic light emitting layer, and the pixel definition layer exceeds the organic light emitting layer along the direction of the substrate pointing to the organic light emitting layer.
In some embodiments, the height of the pixel definition layer beyond the organic light emitting layer is denoted by h1, and the opening size of the pixel definition layer along the setting direction is denoted by d1, which satisfies: h1 is more than or equal to 0.5 × d1.
In some embodiments, the display panel further comprises: a first encapsulation layer covering the pixel defining layer and the organic light emitting layer.
In some embodiments, the display panel further comprises: the organic light emitting diode package structure comprises a black matrix arranged on one side, far away from a substrate, of a first packaging layer, a color resistor filled in an opening area of the black matrix, and a planarization layer covering the black matrix and the color resistor, wherein the opening area of the black matrix is arranged opposite to the organic light emitting layer in a one-to-one correspondence manner, and the color of the color resistor in the opening area is the same as the light emitting color of the organic light emitting layer corresponding to the opening area; the peep-proof structure further comprises the black matrix.
In some embodiments, the display panel further comprises: the display panel comprises a substrate, an organic light emitting layer, a pixel defining layer, a black partition wall and a peep-proof structure, wherein the pixel defining layer is arranged on the substrate and surrounds the organic light emitting layer, the black partition wall is arranged on the pixel defining layer, and the peep-proof structure comprises the partition wall.
In some embodiments, the display panel further comprises: the anti-peeping structure comprises a black matrix arranged on one side, far away from the substrate, of the organic light emitting layer and a color resistor filled in an opening area of the black matrix, a space is reserved between the black matrix and the organic light emitting layer, and the anti-peeping structure comprises the black matrix.
In some embodiments, the thickness of the black matrix is denoted as h2, and the opening size of the black matrix along the setting direction is denoted as d2, so that: h2 is more than or equal to 0.5 × d2.
In some embodiments, the peep-proof structure is in a grid shape or in a plurality of strips arranged in parallel.
The technical scheme adopted by the disclosure is as follows: a display device, comprising: the display panel is provided.
In some embodiments, the set direction is: a left-right direction in an applied state of the display device.
Drawings
Fig. 1a is a cross-sectional view of a display panel of an embodiment of the present disclosure.
Fig. 1b is a layout of a partial structure in the display panel shown in fig. 1 a.
Fig. 2a is a cross-sectional view of a display panel according to another embodiment of the present disclosure.
Fig. 2b is a layout of a partial structure of the display panel shown in fig. 2 a.
Fig. 2c is a cross-sectional view of a display panel according to another embodiment of the present disclosure.
Fig. 3 is a cross-sectional view of a display panel of another embodiment of the present disclosure.
Fig. 4 is a cross-sectional view of a display panel of another embodiment of the present disclosure.
Wherein the reference numerals are: 1. a substrate; 2. an organic light emitting layer; 21. a pixel defining layer; 21a, a partition wall; 3. a first encapsulation layer; 41. a touch functional layer; 51. a black matrix; 52. color resistance; 6. a planarization layer; 71. optical cement; 72. a second encapsulation layer; 8. a polarizing layer; 9. and a cover plate.
Detailed Description
The disclosure will be further described with reference to the embodiments shown in the drawings.
An embodiment of the present disclosure provides a display panel including: the display panel comprises a substrate, a plurality of sub-pixels arranged on the substrate and a peep-proof structure arranged inside the display panel, wherein each sub-pixel comprises: the pixel electrode and the organic light emitting layer are arranged in a stacking mode along the direction far away from the substrate, the orthographic projection of the peep-proof structure on the substrate is located on the outer side of the orthographic projection of the organic light emitting layer on the substrate or overlapped with the edge area of the orthographic projection of the organic light emitting layer on the substrate, the peep-proof structure is a light absorption structure, and the peep-proof structure is used for blocking light emitting of the sub-pixels at a viewing angle larger than 90 degrees in the set direction.
The anti-peeping structure is integrated inside the display panel and shields the light emitted from the sub-pixels with the viewing angle larger than 90 degrees in the set direction. Because need not to set up the peep-proof membrane alone in display device, display device's thickness attenuate, display device's preparation technology is simpler, the yield promotes.
Referring to fig. 1a and 1b, in some embodiments of the present disclosure, a display panel includes: a substrate 1, a pixel defining layer 21, and a plurality of organic light emitting layers 2, the pixel defining layer 21 and the plurality of organic light emitting layers 2 being disposed on the same side surface of the substrate 1, the pixel defining layer 21 defining a light emitting region of each of the plurality of organic light emitting layers 2; the pixel defining layer 21 is black, and the pixel defining layer 21 extends beyond the organic light emitting layer 2 in a direction toward the pixel defining layer 21 along the driving backplane 1.
Specifically, the top surface of the pixel defining layer 21 is a surface of a side thereof away from the substrate 1.
Specifically, in some embodiments, the base 1 serves as a substrate for the driving backplate. The driving backplane includes a substrate 1 and a driving circuit layer (not shown) disposed on the substrate 1. A plurality of layers of wiring and a plurality of pixel circuits are provided in the driver circuit layer. Each pixel circuit is connected to a pixel electrode (not shown). The multi-layer wiring includes a power line, a gate line, a data line, and the like. The pixel electrode, the organic light emitting layer 2, and a common cathode (not shown) covering the organic light emitting layer 2, which are sequentially stacked, constitute one organic light emitting diode. The display panel is also referred to as an Organic Light Emitting Diode (OLED) display panel.
Referring to fig. 1b, the pixel defining layer 21 is in a grid shape, and an opening region of the pixel defining layer 21 is an organic light emitting layer light emitting region.
The conventional pixel defining layer 21 is a transparent structure and has no influence on the light emitting angle of each organic light emitting diode. In the embodiment of the present application, the pixel defining layer 21 is a light absorbing structure, and the height of the pixel defining layer 21 exceeds the organic light emitting layer 2. This enables the pixel defining layer 21 to absorb the large viewing angle light emitted from the organic light emitting layer 2. Further, the pixel defining layer 21 itself is located in the non-display area. Thus, the pixel definition layer 21 existing inside the display panel achieves the purpose of privacy protection. Further, since an external anti-peeping film is not required, the thickness of the display panel can be reduced. By designing the height of the pixel defining layer 21, different viewing angle ranges can be obtained.
Specifically, the pixel defining layer 21 may be formed to be sufficiently thick using a process of multiple spin-on development.
Referring to fig. 1a, the viewing angle a1 of the display panel in the setting direction can be expressed as:
a1=2 × arctan (d 1/h 1), it is clear that the smaller the ratio of d1 to h1, the smaller a 1.
In some embodiments, d1 ≦ h1. This allows the light-exiting angle of the display panel in the set direction to be controlled substantially within a range of ± 45 °. Obviously, the larger h1, the smaller the range of the light exit angle.
Of course, in other embodiments, d1 ≦ 2 × h1.
In a specific example, referring to fig. 1, the size of the opening at the bottom surface of the pixel defining layer 21 in the set direction is 40 μm, the thickness of the pixel defining layer 21 is 41.8 μm, the thickness of the organic light emitting layer 2 is 100-300nm (negligible), the size of the top surface of the organic light emitting layer 2 in the set direction is about 40 μm, the viewing angle of the display panel is about 90 °, and the small viewing angle transmittance of the display panel is 100%.
It should be noted that the difference between the opening size of the bottom surface and the opening size of the top surface of the pixel defining layer 21 is ignored in the embodiment of the present disclosure.
In some embodiments, the materials of the pixel defining layer 21 include: a black resin.
In some embodiments, the organic light emitting layer 2 includes: the organic light emitting layer 2 is formed by sequentially stacking a hole transport layer, a composite light emitting layer and an electron transport layer along the direction of the substrate 1 pointing to the organic light emitting layer.
In some embodiments, the display panel further comprises: a first encapsulation layer 3 covering the pixel defining layer 21 and the organic light emitting layer 2.
In some embodiments, the first encapsulation layer 3 includes a layer stacked in sequence along the direction of the driving backplane 1 pointing to the organic light emitting layer 2: a first inorganic encapsulation layer, an organic encapsulation layer, and a second inorganic encapsulation layer.
In some embodiments, the materials of the first inorganic encapsulation layer include: silicon oxynitride, silicon nitride, or silicon oxide. The material of the first inorganic packaging layer is preferably silicon nitride, and the dielectric constant of the first inorganic packaging layer is large, so that electric leakage can be effectively prevented.
In some embodiments, the materials of the organic encapsulation layer include: and (3) a polyimide.
In some embodiments, the material of the second inorganic encapsulation layer comprises: an oxide of silicon.
In the embodiment shown in fig. 1a, the display panel further comprises a polarizing layer 8 arranged on the first encapsulation layer 3. The polarizing layer 8 is for example a metal wire grid polarizer or a quarter wave plate. The display panel further includes: and the touch control functional layer 41 is arranged on the polarizing layer 8. The touch function layer 41 includes a plurality of layers of wirings and an insulating layer separating the plurality of layers of wirings. The display panel further includes: and a cover plate 9 disposed on the touch functional layer 41. The display panel shown in the embodiment is a rigid OLED display panel.
Referring to fig. 2a and 2b, in some embodiments, the pixel defining layer 21 still defines the region where the organic light emitting layer is located, but the pixel defining layer is not limited to be a light absorbing structure. Black partition walls 21a are provided on the top surface of the pixel defining layer, and the partition walls 21a function to block light emitted from the organic light emitting layer at a large viewing angle in a set direction.
In some embodiments, the material of the partition wall 21a includes black resin.
Referring to fig. 2b, the isolation walls 21a are in a plurality of strip structures, and the extension direction of the isolation walls 21a is perpendicular to the setting direction.
In other embodiments, referring to fig. 2c, the width of the top surface of the partition wall 21a is greater than the width of the bottom surface thereof. Here, the width of the partition wall 21a refers to its dimension in the above-described setting direction.
Note that the height of the pixel defining layer 21 may be higher than the organic light emitting layer 2.
In some embodiments, referring to fig. 3, the display panel further includes: the organic light emitting diode package structure comprises a black matrix 51 arranged on one side of a first package layer 3 far away from a substrate 1, a color resistor 52 filled in an opening area of the black matrix 51, and a planarization layer 6 covering the black matrix 51 and the color resistor 52, wherein the opening area of the black matrix 51 is opposite to the organic light emitting layer 2 in a one-to-one correspondence manner, and the color of the color resistor 52 in the opening area is the same as the light emitting color of the organic light emitting layer 2 corresponding to the opening area.
In these embodiments, the black matrix 51 and the color resists 52 function to enhance the contrast of the display as well as the aforementioned polarizing layer 8. The black matrix 51 may further define the light emitting angle of the display panel.
In the embodiment shown in fig. 3, the planarization layer 6 covers the black matrix 51 and the color resist 52. The cover plate 9 is attached to the planarization layer 6 by an optical glue 71.
In some embodiments, the material of planarization layer 6 includes a transparent optical resin; the material of the black matrix 51 includes: a black resin.
Based on the same inventive concept as the previous embodiment, referring to fig. 4, an embodiment of the present disclosure provides a display panel including: a substrate 1, a plurality of organic light emitting layers 2, a black matrix 51, and a color resist 52 filled in an opening area of the black matrix 51; the organic light emitting layers 2 are arranged on the substrate 1, the black matrix 51 is arranged on the side of the organic light emitting layers far away from the substrate 1, and a space is reserved between the black matrix 51 and the organic light emitting layers 2.
Specifically, the substrate 1 participates in forming a driving backplane, and a pixel electrode (not shown), an organic light emitting layer 2, and a common cathode (not shown) arranged in layers constitute one sub-pixel.
Referring to fig. 4, the opening size of the opening area of the black matrix 51 in the setting direction at the height of the top surface of the black matrix 51 is denoted as d2, and the thickness of the black matrix 51 is denoted as h2. Of course, the difference between the opening size of the top surface of the black matrix 52 and the opening size of the bottom surface of the black matrix 52 is negligible.
Referring to fig. 4, the viewing angle a2 of the display panel in the setting direction may be expressed as:
a2=2 × arctan (d 2/h 2), it is clear that the smaller the ratio of d2 to h2, the smaller a 2.
In these embodiments, the light emission from a large viewing angle is blocked by setting the height of the black matrix 51 to be sufficiently large with respect to the opening size thereof in the set direction. Further, since an external anti-peeping film is not required, the thickness of the display panel can be reduced. The black matrix 51 serves as a privacy structure in these embodiments.
In some embodiments, d2 ≦ h2. This ensures that the viewing angle in the set direction is approximately within 45.
Of course, in other embodiments, d2 ≦ 2 × h2.
In a specific embodiment, referring to fig. 4, along the setting direction, the size of the opening area of the black matrix 51 is 40 μm, the thickness of the black matrix 51 is 83.7 μm, and the transmittance of the black matrix 51 for light with a small viewing angle is 100%. The display panel has a viewing angle of less than 90 deg. The sufficiently thick black matrix 51 may be formed using a process of multiple spin-on development.
In some embodiments, the display panel further comprises: a pixel defining layer 21 disposed on the substrate 1, and a first encapsulation layer 3 disposed between the plurality of organic light emitting layers 2 and the black matrix 51; the plurality of organic light emitting layers 2 are respectively disposed in one opening region of the pixel defining layer 21, and the opening regions of the pixel defining layer 21 are disposed to be opposite to the opening regions of the black matrix 51 in one-to-one correspondence.
Since the black matrix 51 can block light from a large viewing angle, the pixel defining layer 21 may be a transparent structure or a light absorbing structure.
In the embodiment shown in fig. 4, the planarization layer 6 covers the black matrix 51 and the color resists 52, and the second encapsulation layer 72 covers the planarization layer 6. The material of the second encapsulation layer 72 is, for example, transparent polyimide. The display panel in this embodiment may be a flexible display panel.
Specifically, in the embodiment shown in fig. 3 and 4, the shape, size, and position of the orthographic projection of the black matrix 51 on the substrate 1 are substantially the same as those of the orthographic projection of the pixel defining layer 21 on the substrate 1.
Based on the same inventive concept as the previous embodiment, an embodiment of the present disclosure also provides a display device including: the display panel is provided.
In some embodiments, the set direction includes a left-right direction in an application state of the display device.
The display device is, for example, a display module, a display touch module, a display, a mobile phone, a tablet computer, a navigator, an intelligent wearable device and other products or components with a display function.
The embodiments in the present disclosure are described in a progressive manner, and the same and similar parts among the embodiments can be referred to each other, and each embodiment focuses on differences from other embodiments.
The scope of the present disclosure is not limited to the above-described embodiments, and it is apparent that various modifications and variations can be made to the present disclosure by those skilled in the art without departing from the scope and spirit of the present disclosure. It is intended that the present disclosure also cover the modifications and variations of this invention provided they come within the scope of the appended claims and their equivalents.
Claims (11)
1. A display panel, comprising: the display panel comprises a substrate, a plurality of sub-pixels arranged on the substrate and a peep-proof structure arranged inside the display panel, wherein each sub-pixel comprises: the pixel electrode and the organic light emitting layer are arranged in a stacking mode along the direction far away from the substrate, the orthographic projection of the peep-proof structure on the substrate is located on the outer side of the orthographic projection of the organic light emitting layer on the substrate or overlapped with the edge area of the orthographic projection of the organic light emitting layer on the substrate, the peep-proof structure is a light absorption structure, and the peep-proof structure is used for blocking light emitting of the sub-pixels at a viewing angle larger than 90 degrees in the set direction.
2. The display panel of claim 1, wherein the privacy feature comprises: the black pixel definition layer is arranged on the substrate and surrounds the organic light emitting layer, and the pixel definition layer exceeds the organic light emitting layer along the direction of the substrate pointing to the organic light emitting layer.
3. The display panel according to claim 2, wherein a height of the pixel definition layer beyond the organic light emitting layer is denoted by h1, and an opening size of the pixel definition layer in the setting direction is denoted by d1, and the following conditions are satisfied: h1 is more than or equal to 0.5 × d1.
4. The display panel according to claim 2, characterized in that the display panel further comprises: a first encapsulation layer covering the pixel defining layer and the organic light emitting layer.
5. The display panel according to claim 2, characterized in that the display panel further comprises: the organic light emitting diode package comprises a black matrix arranged on one side, far away from the substrate, of the first package layer, a color resistor filled in an opening area of the black matrix, and a planarization layer covering the black matrix and the color resistor, wherein the opening area of the black matrix and the organic light emitting layer are oppositely arranged in a one-to-one correspondence manner, and the color of the color resistor in the opening area is the same as the light emitting color of the organic light emitting layer corresponding to the opening area; the peep-proof structure further comprises the black matrix.
6. The display panel according to claim 1, characterized in that the display panel further comprises: the display panel comprises a substrate, an organic light emitting layer, a pixel defining layer, a black partition wall and a peep-proof structure, wherein the pixel defining layer is arranged on the substrate and surrounds the organic light emitting layer, the black partition wall is arranged on the pixel defining layer, and the peep-proof structure comprises the partition wall.
7. The display panel according to claim 1, wherein the display panel further comprises: the anti-peeping structure comprises a black matrix arranged on one side, far away from the substrate, of the organic light emitting layer and a color resistor filled in an opening area of the black matrix, a space is reserved between the black matrix and the organic light emitting layer, and the anti-peeping structure comprises the black matrix.
8. The display panel according to claim 7, wherein a thickness of the black matrix is denoted as h2, and an opening size of the black matrix in the setting direction is denoted as d2, and the following conditions are satisfied: h2 is more than or equal to 0.5 × d2.
9. The display panel according to claim 1, wherein the privacy protecting structure is in a grid shape or in a plurality of strips arranged in parallel.
10. A display device, comprising: the display panel according to any one of claims 1 to 10.
11. The display panel according to claim 1, wherein the set direction is: left and right in an applied state of the display device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210873707.8A CN115498124A (en) | 2022-07-21 | 2022-07-21 | Display panel and display device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210873707.8A CN115498124A (en) | 2022-07-21 | 2022-07-21 | Display panel and display device |
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| CN115498124A true CN115498124A (en) | 2022-12-20 |
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| CN202210873707.8A Pending CN115498124A (en) | 2022-07-21 | 2022-07-21 | Display panel and display device |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115843199A (en) * | 2023-02-20 | 2023-03-24 | 惠科股份有限公司 | Display panel and display device |
| CN116261353A (en) * | 2022-12-27 | 2023-06-13 | 惠科股份有限公司 | Display panel and display device |
| CN116322195A (en) * | 2022-12-28 | 2023-06-23 | 惠科股份有限公司 | Display panel, manufacturing method thereof and display device |
| CN116322146A (en) * | 2023-03-22 | 2023-06-23 | 惠科股份有限公司 | Display panel and display device |
-
2022
- 2022-07-21 CN CN202210873707.8A patent/CN115498124A/en active Pending
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116261353A (en) * | 2022-12-27 | 2023-06-13 | 惠科股份有限公司 | Display panel and display device |
| CN116261353B (en) * | 2022-12-27 | 2024-04-12 | 惠科股份有限公司 | Display panel and display device |
| CN116322195A (en) * | 2022-12-28 | 2023-06-23 | 惠科股份有限公司 | Display panel, manufacturing method thereof and display device |
| CN116322195B (en) * | 2022-12-28 | 2024-03-26 | 惠科股份有限公司 | Display panel, manufacturing method thereof and display device |
| CN115843199A (en) * | 2023-02-20 | 2023-03-24 | 惠科股份有限公司 | Display panel and display device |
| CN116322146A (en) * | 2023-03-22 | 2023-06-23 | 惠科股份有限公司 | Display panel and display device |
| CN116322146B (en) * | 2023-03-22 | 2024-05-24 | 惠科股份有限公司 | Display panel and display device |
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