Display panel and display device

Abstract

This application discloses a display panel and display device, including a pixel area and a non-pixel area located around the pixel area. The display panel further includes a substrate, a light-emitting layer, a liquid crystal layer, and an electrode pair. The light-emitting layer is located on one side of the substrate and includes light-emitting elements located in the pixel area. The liquid crystal layer is disposed on the side of the light-emitting layer opposite to the substrate and includes liquid crystal molecules located at least in the non-pixel area. The electrode pair is configured to apply a voltage to the liquid crystal molecules in the liquid crystal layer to deflect the liquid crystal molecules. This application, by disposing a liquid crystal layer above the light-emitting layer and controlling the deflection of the liquid crystal molecules in the liquid crystal layer by the electrode pair to form a convex lens structure, allows the liquid crystal molecules with the lens structure to produce a refractive effect, reducing the reflectivity of the display panel and thereby improving the product reliability of the display device.

Description

Technical Field

[0001] This invention relates to the field of display technology, and in particular to a display panel and display device. Background Technology

[0002] Existing display panels have high reflectivity, resulting in poor display quality and low product reliability of display devices. Summary of the Invention

[0003] The main technical problem addressed by this application is to provide a display panel and display device that can improve the product reliability of the display device.

[0004] To solve the above-mentioned technical problems, this application adopts the following technical solution: A display panel is provided, including a pixel area and a non-pixel area located around the pixel area. The display panel further includes a substrate, a light-emitting layer, a liquid crystal layer, and an electrode pair. The light-emitting layer is located on one side of the substrate and includes light-emitting elements located in the pixel area. The liquid crystal layer is disposed on the side of the light-emitting layer opposite to the substrate and includes liquid crystal molecules located at least in the non-pixel area. The electrode pair is configured to apply a voltage to the liquid crystal molecules in the liquid crystal layer to deflect the liquid crystal molecules.

[0005] To solve the above-mentioned technical problems, this application also provides a technical solution: a display device including the display panel described above.

[0006] Beneficial effects: This application sets a liquid crystal layer above the light-emitting layer, and the electrode pairs control the liquid crystal molecules in the liquid crystal layer to deflect to form a convex lens structure. This allows the liquid crystal molecules in the lens structure to produce a refractive effect, reducing the reflectivity of the display panel and thus improving the product reliability of the display device. Attached Figure Description

[0007] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. Wherein:

[0008] Figure 1 This is a schematic diagram of the structure of a display panel provided in one embodiment of this application;

[0009] Figure 2 This is a schematic diagram of the structure of a display panel provided in another embodiment of this application;

[0010] Figure 3 A top view schematic diagram of a display panel provided in an embodiment of this application;

[0011] Figure 4 A top view of a display panel provided in another embodiment of this application;

[0012] Figure 5 This is a schematic diagram of the retaining wall provided in one embodiment of this application;

[0013] Figure 6 This is a schematic diagram of the retaining wall provided in another embodiment of this application;

[0014] Figure 7 This is a structural schematic diagram of a retaining wall provided in yet another embodiment of this application;

[0015] Figure 8 This is a schematic diagram of the structure of a display device provided in an embodiment of this application. Detailed Implementation

[0016] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0017] The terms "first," "second," and "third" in this application are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, a feature defined as "first," "second," or "third" may explicitly or implicitly include at least one of that feature. In the description of this application, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified. All directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of this application are only used to explain the relative positional relationships and movements between components in a specific orientation (as shown in the figures). If the specific orientation changes, the directional indications also change accordingly. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion. For example, a process, method, system, product, or device that includes a series of steps or units is not limited to the listed steps or units, but may optionally include steps or units not listed, or may optionally include other steps or units inherent to these processes, methods, products, or devices.

[0018] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0019] Please refer to the following: Figure 1 and Figure 2 In one embodiment of this application, a display panel 100 is provided, including a pixel area 10 and a non-pixel area 20 located around the pixel area 10. The pixel area 10 refers to the area where the light-emitting elements 41 are located, and the non-pixel area 20 refers to the area surrounding the pixel area 10. When the display panel 100 includes multiple light-emitting elements 41, and the multiple light-emitting elements 41 constitute multiple pixel units (e.g., each pixel unit includes three light-emitting elements 41 with different emitting colors), the multiple light-emitting elements 41 in the same pixel unit are located in the same pixel area 10, and the light-emitting elements 41 in different pixel units are located in different pixel areas 10. In this case, the number of pixel units is equal to the number of pixel areas 10, and the multiple pixel units are arranged in a one-to-one correspondence with the multiple pixel areas 10. In another embodiment, the pixel areas 10 are arranged in a one-to-one correspondence with the light-emitting elements 41, and each pixel area 10 has only one light-emitting element 41. The number of pixel areas 10 is equal to the number of light-emitting elements 41.

[0020] Meanwhile, the display panel 100 includes a substrate 30, a light-emitting layer 40, a liquid crystal layer 50, and an electrode pair 60.

[0021] The light-emitting layer 40 is located on one side of the substrate 30. The light-emitting layer 40 includes light-emitting elements 41 located in the pixel area 10. The light-emitting elements 41 emit light to ensure that the display panel 100 displays an image. In one application scenario, there are multiple light-emitting elements 41. Some light-emitting elements 41 emit red light, some emit green light, and some emit blue light.

[0022] The liquid crystal layer 50 is disposed on the side of the light-emitting layer 40 away from the substrate 30, and the liquid crystal layer 50 includes liquid crystal molecules 51 located at least in the non-pixel region 20. That is, the liquid crystal molecules 51 may be located only in the non-pixel region 20, or in the pixel region 10 and the non-pixel region 20, thereby reducing the reflectivity of the liquid crystal molecules 51 to external light.

[0023] The electrode pair 60 is configured to apply a voltage to the liquid crystal molecules 51 within the liquid crystal layer 50, causing the liquid crystal molecules 51 to deflect. The liquid crystal molecules 51 located in the non-pixel region 20 can change their reflectivity to external light according to the voltage applied by the electrode pair 60, thus changing the reflection angle of the non-pixel region 20 corresponding to the liquid crystal molecule 51.

[0024] In the aforementioned display panel 100, by providing a liquid crystal layer 50 above the light-emitting layer 40, the electrode pair 60 controls the liquid crystal molecules 51 in the liquid crystal layer 50 to deflect to form a convex lens structure, thereby adjusting the reflection angle of the liquid crystal molecules 51 to external light, thereby reducing the reflectivity of the display panel 100 and improving product reliability.

[0025] Please refer to the following: Figure 1 , Figure 3 and Figure 4 In one embodiment, the display panel 100 is a transparent display panel, allowing the pixel areas 10 to be used to display light. The number of pixel areas 10 can be multiple, and these multiple pixel areas 10 can be arranged in an array to increase the display area of ​​the display panel 100 and improve its readability.

[0026] Please continue reading. Figure 1 , Figure 3 and Figure 4 In one embodiment, the non-pixel area 20 includes a wiring sub-area 21 and a light-transmitting sub-area 22. The wiring sub-area 21 includes signal lines that electrically connect two adjacent light-emitting elements 41. The light-transmitting sub-area 22 makes the non-pixel area 20 part transparent, allowing external light to pass through the light-transmitting sub-area 22 and improving the transmittance of the display panel 100.

[0027] It is understandable that when the liquid crystal molecule 51 is only located in the non-pixel area 20, the liquid crystal molecule 51 can adjust the reflection angle of the external light entering the non-pixel area 20, thereby reducing the reflectivity of the display panel 100.

[0028] When the liquid crystal molecule 51 is located in the non-pixel area 20 and the pixel area 10, the liquid crystal molecule 51 can adjust the reflection angle of external light entering the non-pixel area 20 and the pixel area 10, further reducing the reflectivity of the display panel 100. At the same time, the liquid crystal molecule 51 can also adjust the light emission angle of the light-emitting element 41 in the pixel area 10 when it passes through the liquid crystal molecule 51, thereby improving the light emission rate of the light-emitting element 41 and improving the display effect of the display panel 100.

[0029] Please refer to it again. Figure 1 and Figure 2In one embodiment, the electrode pair 60 includes a first electrode 61 and a second electrode 62. The first electrode 61 and the second electrode 62 are disposed on the same side of the liquid crystal molecule 51 and are spaced apart along a direction X parallel to the substrate 30. The first electrode 61 and the second electrode 62 can apply a voltage to the liquid crystal molecule 51, thereby effectively adjusting the reflection angle of the liquid crystal molecule 51 to external light, thus reducing the reflectivity of the display panel 100. Simultaneously, the first electrode 61 and the second electrode 62 can also adjust the light emission angle of the liquid crystal molecule 51 to the light-emitting element 41 of the pixel area 10, improving the light emission rate of the light-emitting element 41 and enhancing the display effect of the display panel 100.

[0030] Specifically, one of the first electrode 61 and the second electrode 62 is a positive electrode, and the other is a negative electrode, thereby forming an electric field for controlling the liquid crystal layer 50 through the electrode pair 60. When the first electrode 61 and the second electrode 62 control the liquid crystal molecules 51 to deflect and form a convex lens structure, the liquid crystal molecules 51 can adjust the reflection angle of external light and the emission angle of emitted light. The greater the curvature of the formed lens structure, the greater the voltage difference applied to the electrode pair 60 corresponding to the liquid crystal molecules 51 forming the lens structure.

[0031] Please continue reading. Figure 1 and Figure 2 In one embodiment, there are multiple electrode pairs 60, which are spaced apart along a direction X parallel to the substrate 30, thereby improving the efficiency of the electrode pairs 60 in adjusting the deflection of the liquid crystal molecules 51 and the accuracy of adjusting the deflection angle of the liquid crystal molecules 51.

[0032] Please continue reading. Figure 1 and Figure 2 In one embodiment, the liquid crystal layer 50 further includes a first substrate 52 and a second substrate 53 sequentially disposed in the direction away from the substrate 30, wherein liquid crystal molecules 51 are sandwiched between the first substrate 52 and the second substrate 53. The first substrate 52 and the second substrate 53 can limit the movement range of the liquid crystal molecules 51 in the direction away from the substrate 30, thereby reducing the risk that the liquid crystal molecules 51 will overflow outside the liquid crystal layer 50, causing the first electrode 61 and the second electrode 62 to be unable to control the deflection angle of the liquid crystal molecules 51.

[0033] In one embodiment, the first substrate 52 and the second substrate 53 are transparent substrates, which reduces the risk that the first substrate 52 and the second substrate 53 will affect the light emission effect of the light-emitting element 41.

[0034] In one embodiment, the first substrate 52 and the second substrate 53 are made of the same material, which facilitates fabrication. Alternatively, the materials of the first substrate 52 and the second substrate 53 may be different as needed.

[0035] Please continue reading. Figure 1 and Figure 2 In this embodiment, the first electrode 61 and the second electrode 62 are disposed at intervals along a direction X parallel to the substrate 30 on the side of the first substrate 52 facing the second substrate 53.

[0036] Please refer to the following: Figure 1 and Figure 3 In one embodiment, the orthographic projection of the liquid crystal molecule 51 on the substrate 30 does not overlap with the orthographic projection of the light-emitting element 41 on the substrate 30. That is, the liquid crystal molecule 51 is only located in the non-pixel area 20. The liquid crystal molecule 51 in the non-pixel area 20 can adjust the reflection angle of external light entering the non-pixel area 20, thereby reducing the reflectivity of the display panel 100 and improving the product reliability of the display panel 100.

[0037] Please continue reading. Figure 1 and Figure 3 In one embodiment, the display panel 100 further includes a barrier 70 located within the liquid crystal layer 50 and surrounding the light-emitting element 41. When the liquid crystal molecules 51 are only located in the non-pixel area 20, the barrier 70 can limit the liquid crystal molecules 51 due to their fluidity, isolating them outside the light-emitting element 41, thereby reducing the risk of liquid crystal molecules 51 penetrating into the light-emitting element 41 and causing significant viewing angle distortion in the pixel area 10 of the display panel 100.

[0038] It is understood that the barrier 70 can be disposed around a single light-emitting element 41, or around multiple light-emitting elements 41 constituting a pixel unit (see Figure 1). Figure 3 This achieves the purpose of the barrier 70 isolating liquid crystal molecules 51 from entering a single pixel unit.

[0039] In one embodiment, the material of the barrier 70 includes at least one of organic materials, inorganic materials and metallic materials, thereby improving the light emission efficiency of the light-emitting element 41.

[0040] Specifically, the organic materials that can be used to prepare the retaining wall 70 include organic adhesive materials; the inorganic materials that can be used to prepare the retaining wall 70 include one or more of silicon nitride, silicon oxynitride, etc.; and the metallic materials that can be used to prepare the retaining wall 70 include one or more of molybdenum, titanium, indium tin oxide, etc.

[0041] Please continue reading. Figure 1 and Figure 3 In one embodiment, the cross-section of the barrier 70 perpendicular to the substrate 30 is rectangular (see figure). Figure 5 ), I-shaped (see) Figure 6 ) or inverted trapezoid (see Figure 7It is understandable that as long as the minimum width of the cross section of the barrier 70 perpendicular to the substrate 30 is greater than or equal to the width of the light-emitting element 41, it can achieve the function of preventing liquid crystal molecules 51 from penetrating into the light-emitting element 41. Therefore, the structure of the barrier 70 is not specifically limited in this regard and can be set as needed.

[0042] Please continue reading. Figure 1 and Figure 3 In one embodiment, the barrier 70 can be first formed on the first substrate 52 and disposed around the light-emitting element 41, and then the second substrate 53 can be placed at the end of the barrier 70 away from the first substrate 52. Liquid crystal molecules 51 are then filled between the cavity formed by the first substrate 52 and the second substrate 53 to reduce the risk of liquid crystal molecules 51 penetrating into the barrier 70.

[0043] Please refer to the following: Figure 2 and Figure 4 In one embodiment, the orthographic projection of the liquid crystal molecule 51 onto the substrate 30 overlaps with the orthographic projection of the light-emitting layer 40 onto the substrate 30. When the liquid crystal molecule 51 is located in the non-pixel area 20 and the pixel area 10, the liquid crystal molecule 51 can adjust the reflection angle of external light entering the non-pixel area 20 and the pixel area 10, further reducing the reflectivity of the display panel 100. At the same time, the liquid crystal molecule 51 can also adjust the light emission angle of the light-emitting element 41 in the pixel area 10 when it passes through the liquid crystal molecule 51, thereby improving the light emission rate of the light-emitting element 41 and improving the display effect of the display panel 100.

[0044] Specifically, when a voltage is applied to the first electrode 61 and the second electrode 62 to deflect the liquid crystal molecules 51 located in the pixel area 10 to form a convex lens structure, the refractive index of the liquid crystal molecules 51 in the pixel area 10 increases, which increases the light emission angle of the light-emitting element 41 corresponding to the liquid crystal molecules 51. This increases the light emission brightness at the light-emitting element 41 while reducing or eliminating the light emission blind zone, thereby improving the display effect of the display panel 100.

[0045] Please continue reading. Figure 2 and Figure 4 In one embodiment, when the display panel 100 includes multiple pixel areas 10, an electrode pair 60 can be provided at the location of each pixel area 10. The electrode pair 60 applies a voltage to the liquid crystal molecules 51 at the location of each pixel area 10 to adjust the deflection angle, thereby adjusting the light emission angle of the light-emitting element 41 in each pixel area 10. Although this can further improve the light emission efficiency of the light-emitting element 41 and increase the display brightness of the display panel 100, it is prone to causing a large viewing angle color shift problem in the display panel 100.

[0046] Different voltage differences can be set for the electrode pairs 60 at different pixel areas 10, so that the liquid crystal molecules 51 of the two pixel areas 10 deflect at different angles. This adjusts the light emission path of the light-emitting elements 41 in the two pixel areas 10 to generate binocular parallax, improves the problem of visual distortion of the emitted light entering the human eye, and thus improves the display effect of the display panel 100.

[0047] Please refer to it again. Figure 1 and Figure 2 In one embodiment, the liquid crystal layer 50 is further doped with blue powder material 80 to improve the yellowing problem of the display panel 100.

[0048] Specifically, most colors in the visible spectrum can be created by mixing three primary colors of light in different proportions. These three primary colors are red, green, and blue. According to the additive color mixing principle, red + green = yellow, and yellow + blue = white. Given the positions of the three primary colors of light in the visible spectrum, red has the longest wavelength, and blue has the shortest. This causes the display panel 100 to easily appear yellowish when multiple light-emitting elements 41 in a pixel unit emit light, resulting in poor display performance. Therefore, by doping blue powder material 80 into the liquid crystal layer 50, the transmittance of blue light can be further improved. This blue light is then added to the original yellowish background color of the display panel 100, increasing the brightness of the display panel 100 and improving its clarity.

[0049] In one embodiment, the doping ratio of blue powder material 80 in liquid crystal layer 50 is in the range of 3%-5%, so that the blue powder material 80 can be uniformly distributed in liquid crystal molecules 51 and arranged in an orderly manner following the arrangement of liquid crystal molecules 51.

[0050] In one embodiment, the blue powder material 80 comprises an organic dye.

[0051] Please see Figure 8 This application also provides a display device 200, including the aforementioned display panel 100.

[0052] It should be noted that the display device 200 provided in the embodiments of the present invention can be any product or component with display function, such as a mobile phone, tablet computer, television, monitor, laptop computer, digital photo frame, etc.

[0053] The above are merely embodiments of this application and do not limit the scope of this patent application. Any equivalent structural or procedural changes made using the content of this application's specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the scope of patent protection of this application.

Claims

1. A display panel, characterized by, The display panel comprises a pixel region and a non-pixel region located at the periphery of the pixel region, and further comprises: a substrate; a light-emitting layer located on one side of the substrate, the light-emitting layer comprising light-emitting elements located at the pixel region; a liquid crystal layer provided on the side of the light-emitting layer away from the substrate, the liquid crystal layer comprising liquid crystal molecules located at the pixel region and the non-pixel region, the orthographic projection of the liquid crystal molecules on the substrate covering the orthographic projection of the light-emitting layer on the substrate, wherein the liquid crystal layer is further doped with blue powder material; a pair of electrodes configured to apply voltage to the liquid crystal molecules in the liquid crystal layer to deflect the liquid crystal molecules to form a convex lens structure.

2. The display panel of claim 1, wherein, The doping proportion of the blue powder material in the liquid crystal layer ranges from 3% to 5%.

3. The display panel of claim 1, wherein, The pair of electrodes comprises a first electrode and a second electrode, the first electrode and the second electrode being arranged on the same side of the liquid crystal molecules and being spaced apart along a direction parallel to the substrate.

4. The display panel of claim 3, wherein, The number of the pair of electrodes is multiple, and multiple pairs of the electrodes are spaced apart along a direction parallel to the substrate.

5. The display panel of claim 3, wherein, The liquid crystal layer further comprises a first substrate and a second substrate arranged in sequence in the direction away from the substrate, wherein the liquid crystal molecules are sandwiched between the first substrate and the second substrate.

6. The display panel of claim 5, wherein, The first electrode and the second electrode are spaced apart along a direction parallel to the substrate on the side of the first substrate facing the second substrate.

7. The display panel of claim 5, wherein, The first substrate and the second substrate are transparent substrates.

8. The display panel of claim 5, wherein, The first substrate and the second substrate are made of the same material.

9. The display panel of claim 1, wherein, The number of the pixel regions is multiple, and multiple pixel regions are arranged in an array.

10. The display panel of claim 1, wherein, The non-pixel region comprises a wiring sub-region and a light-transmitting sub-region, and the wiring sub-region comprises a signal line electrically connected to two adjacent light-emitting elements.

11. A display device, characterized by comprising: The display panel comprises any one of the display panels in claims 1 to 10.

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