Display panel and display device

Abstract

The invention discloses a display panel and a display device, the display panel comprises a pixel area and a non-pixel area located on the periphery of the pixel area, the display panel further comprises 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 the light-emitting layer comprises a light-emitting element located at the pixel area; the liquid crystal layer is arranged on the side, away from the substrate, of the light-emitting layer and comprises liquid crystal molecules at least located in the non-pixel area. The electrode pair is configured to apply a voltage to liquid crystal molecules in the liquid crystal layer to deflect the liquid crystal molecules. The liquid crystal layer is arranged above the light-emitting layer, the electrode pair controls the liquid crystal molecules in the liquid crystal layer to deflect so as to form the convex lens structure, the liquid crystal molecules of the lens structure can generate a refraction effect, the reflectivity of the display panel is reduced, and therefore the product reliability of the display device is improved.

Description

Technical Field

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

[0002] The existing display panel has a high reflectivity, which results in poor display effect of the display panel, and thus the product reliability of the display device is low. Summary of the invention

[0003] The main technical problem solved by the present application is to provide a display panel and a display device, which can improve the product reliability of the display device.

[0004] In order to solve the above technical problems, the present application adopts a technical solution: providing a display panel, including a pixel area and a non-pixel area located outside the pixel area, the display panel also 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, the light-emitting layer includes a light-emitting element located at the pixel area; the liquid crystal layer is arranged on the side of the light-emitting layer away from the substrate, the liquid crystal layer 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] In order to solve the above technical problem, the present application also provides a technical solution: providing a display device, including the display panel described above.

[0006] Beneficial effect: The present application sets a liquid crystal layer above the light-emitting layer, and the electrodes control the liquid crystal molecules in the liquid crystal layer to deflect to form a convex lens structure, so that the liquid crystal molecules in the lens structure can produce a refractive effect, reduce the reflectivity of the display panel, and thus improve the product reliability of the display device. BRIEF DESCRIPTION OF THE DRAWINGS

[0007] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work. Among them:

[0008] Figure 1 A schematic diagram of the structure of a display panel provided in one embodiment of the present application;

[0009] Figure 2 A schematic diagram of the structure of a display panel provided in another embodiment of the present application;

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

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

[0012] Figure 5 A schematic diagram of the structure of a retaining wall provided in one embodiment of the present application;

[0013] Figure 6 A schematic diagram of the structure of a retaining wall provided in another embodiment of the present application;

[0014] Figure 7 A schematic structural diagram of a retaining wall provided in yet another embodiment of the present application;

[0015] Figure 8 A schematic diagram of the structure of a display device provided in one embodiment of the present application. DETAILED DESCRIPTION

[0016] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0017] The terms "first", "second", "third" in this application are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features. Thus, the features defined as "first", "second", "third" can expressly or implicitly include at least one of the features. In the description of this application, the meaning of "multiple" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined. In the embodiments of this application, all directional indications (such as up, down, left, right, front, back...) are only used to explain the relative position relationship, movement, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication also changes accordingly. In addition, the terms "including" and "having" and any of their variations are intended to cover non-exclusive inclusions. For example, a process, method, system, product or device comprising a series of steps or units is not limited to the steps or units listed, but optionally also includes steps or units that are not listed, or optionally also includes other steps or units inherent to these processes, methods, products or devices.

[0018] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0019] Please also read Figure 1 and Figure 2 In one embodiment of the present application, a display panel 100 is provided, comprising a pixel area 10 and a non-pixel area 20 located outside the pixel area 10. The pixel area 10 refers to the area where the light-emitting element 41 is located, and the non-pixel area 20 refers to the area outside the pixel area 10. Wherein, when the display panel 100 includes a plurality of light-emitting elements 41, and the plurality of light-emitting elements 41 constitute a plurality of pixel units (for example, each pixel unit includes three light-emitting elements 41 with different light-emitting colors), the plurality of light-emitting elements 41 in the same pixel unit are in the same pixel area 10, and the light-emitting elements 41 in different pixel units are in different pixel areas 10. At this time, the number of pixel units is equal to the number of pixel areas 10, and the plurality of pixel units are arranged in a one-to-one correspondence with the plurality of pixel areas 10. In another embodiment, the pixel areas 10 and the light-emitting elements 41 are arranged in a one-to-one correspondence, and only one light-emitting element 41 is arranged in each pixel area 10, and 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, and the light emitting layer 40 includes a light emitting element 41 located at the pixel area 10, and the light emitting element 41 emits light to ensure that the display panel 100 displays the picture. In an application scenario, there are multiple light emitting elements 41, some of which 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 at least located in the non-pixel area 20. That is, the liquid crystal molecules 51 can be located only in the non-pixel area 20, or in the pixel area 10 and the non-pixel area 20, so as to reduce 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 in the liquid crystal layer 50 to deflect the liquid crystal molecules 51. The liquid crystal molecules 51 in the non-pixel area 20 can change the reflectivity of the external light according to the voltage applied by the electrode pair 60, so that the reflection angle of the non-pixel area 20 corresponding to the liquid crystal molecules 51 also changes accordingly.

[0024] In the above-mentioned display panel 100, by setting 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 to adjust 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 also read Figure 1 , Figure 3 and Figure 4 In one embodiment, the display panel 100 is a transparent display panel, so that the pixel area 10 can be used to display light. The number of pixel areas 10 can be multiple, and the multiple pixel areas 10 are arranged in an array to increase the display area of ​​the display panel 100 and improve the readability of the display panel 100.

[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 transparent sub-area 22. The wiring sub-area 21 includes a signal line electrically connecting two adjacent light-emitting elements 41. The transparent sub-area 22 makes the non-pixel area 20 partially transparent, allowing external light to penetrate the transparent sub-area 22, thereby improving the transmittance of the display panel 100.

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

[0028] When the liquid crystal molecules 51 are located in the non-pixel area 20 and the pixel area 10, the liquid crystal molecules 51 can adjust the reflection angle of the 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 molecules 51 can also adjust the light output angle of the light-emitting element 41 of the pixel area 10 when passing through the liquid crystal molecules 51, thereby improving the light output rate of the light-emitting element 41 and improving the display effect of the display panel 100.

[0029] Please refer again Figure 1 and Figure 2In one embodiment, the electrode pair 60 includes a first electrode 61 and a second electrode 62, and the first electrode 61 and the second electrode 62 are arranged on the same side of the liquid crystal molecule 51, and the first electrode 61 and the second electrode 62 are arranged at intervals 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, so that the reflection angle of the liquid crystal molecule 51 to the external light can be effectively adjusted to reduce the reflectivity of the display panel 100. At the same time, the first electrode 61 and the second electrode 62 can also adjust the light output angle of the liquid crystal molecule 51 to the light emitting element 41 of the pixel area 10, improve the light output rate of the light emitting element 41, and improve 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 to form a convex lens structure, the liquid crystal molecules 51 can adjust the reflection angle of the external light and the light emitting angle of the light emitting 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, and the multiple electrode pairs 60 are arranged at intervals along a direction X parallel to the substrate 30, thereby improving the efficiency of the electrode pairs 60 in regulating the deflection of the liquid crystal molecules 51 and the accuracy of regulating 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 a direction away from the substrate 30, wherein the 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 overflow outside the liquid crystal layer 50 and cause 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, so as to reduce the risk that the first substrate 52 and the second substrate 53 affect the light emitting 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 for easy preparation. Optionally, the first substrate 52 and the second substrate 53 can also be made of different materials according to requirements.

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

[0036] Please also read 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, and the liquid crystal molecule 51 in the non-pixel area 20 can adjust the reflection angle of the 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 retaining wall 70, which is located in the liquid crystal layer 50 and surrounds the light emitting element 41. When the liquid crystal molecules 51 are only located in the non-pixel area 20, since the liquid crystal molecules 51 have fluidity, the retaining wall 70 can limit the liquid crystal molecules 51 and isolate the liquid crystal molecules 51 outside the light emitting element 41, so as to reduce the risk of the liquid crystal molecules 51 penetrating into the light emitting element 41 and causing a large color deviation of the pixel area 10 of the display panel 100.

[0038] It is understandable that the retaining wall 70 may be disposed at the periphery of a light emitting element 41, or may be disposed at the periphery of a plurality of light emitting elements 41 constituting a pixel unit (see Figure 3 ), so as to achieve the purpose of isolating the liquid crystal molecules 51 from entering a single pixel unit by the barrier wall 70.

[0039] In one embodiment, the material of the retaining wall 70 includes at least one of an organic material, an inorganic material and a metal material, so as to improve the light extraction efficiency of the light emitting element 41 .

[0040] Specifically, the organic material that can be used to prepare the retaining wall 70 includes organic glue materials; the inorganic material that can be used to prepare the retaining wall 70 includes one or more of silicon nitride, silicon oxynitride, etc.; the metal material that can be used to prepare the retaining wall 70 includes 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 retaining wall 70 perpendicular to the substrate 30 is rectangular (see Figure 5 ), I-shaped (refer to Figure 6 ) or inverted trapezoid (ref. Figure 7It can be understood that as long as the minimum width of the cross section of the retaining wall 70 perpendicular to the substrate 30 is greater than or equal to the width of the light-emitting element 41, the function of blocking the liquid crystal molecules 51 from penetrating into the light-emitting element 41 can be achieved. Therefore, the structure of the retaining wall 70 is not specifically limited and can be set as needed.

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

[0043] Please also read Figure 2 and Figure 4 In one embodiment, the orthographic projection of the liquid crystal molecule 51 on the substrate 30 covers the orthographic projection of the light-emitting layer 40 on 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 the 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 output angle of the light-emitting element 41 of the pixel area 10 when passing through the liquid crystal molecule 51, thereby improving the light output 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, so that the light emission angle of the light-emitting element 41 corresponding to the liquid crystal molecule 51 increases, and the light brightness at the light-emitting element 41 is increased while reducing or eliminating the light-emitting blind area, 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 a plurality of pixel regions 10, an electrode pair 60 may be provided at each pixel region 10, so that the electrode pair 60 applies a voltage to the liquid crystal molecules 51 at each pixel region 10 to adjust the deflection angle, thereby adjusting the light emitting angle of the light emitting element 41 in each pixel region 10. In this case, although the light emitting efficiency of the light emitting element 41 can be further improved and the display brightness of the display panel 100 can be increased, the problem of large viewing angle color deviation of the display panel 100 is likely to occur.

[0046] Among them, different voltage differences can be set for the electrode pairs 60 at different pixel areas 10, so that the deflection angles of the liquid crystal molecules 51 in the two pixel areas 10 are different, so as to adjust the light emission paths of the light-emitting elements 41 in the two pixel areas 10 to produce binocular parallax, improve the problem of visual color deviation of the light emission light entering the human eye, and thus improve the display effect of the display panel 100.

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

[0048] Specifically, most colors in the visible spectrum can be formed by mixing three basic colors of light in different proportions. The colors of these three basic colors of light are the three primary colors of red, green, and blue. According to the principle of additive color of the three primary colors of light, red + green = yellow, yellow + blue = white. For the positions of the three primary colors of light in the visible spectrum, red has the longest wavelength and blue has the shortest wavelength. This causes the display panel 100 to be easily yellow when the multiple light-emitting elements 41 in a pixel unit emit light, and the display effect of the display panel 100 is poor. Therefore, by doping the blue powder material 80 in the liquid crystal layer 50, the transmittance of the blue light can be further improved, and the original yellow background color of the display panel 100 can be added to improve the display brightness of the display panel 100 after adding color to improve the clarity of the display of the display panel 100.

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

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

[0051] See also Figure 8 The present application also provides a display device 200 , comprising the above-mentioned display panel 100 .

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

[0053] The above are only implementation methods of the present application, and are not intended to limit the patent scope of the present application. Any equivalent structure or equivalent process transformation made using the contents of the present application specification and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present application.

Claims

1. A display panel, characterized in that: The display panel includes a pixel area and a non-pixel area located outside the pixel area, and further includes: substrate; A light-emitting layer, located on one side of the substrate, wherein the light-emitting layer includes a light-emitting element located at the pixel area; A liquid crystal layer, disposed on a side of the light-emitting layer away from the substrate, the liquid crystal layer comprising liquid crystal molecules at least located 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.

2. The display panel according to claim 1, characterized in that: The orthographic projection of the liquid crystal molecules on the substrate does not overlap with the orthographic projection of the light emitting element on the substrate.

3. The display panel according to claim 2, characterized in that: The display panel further includes a retaining wall, which is located in the liquid crystal layer and surrounds the light emitting element; Preferably, the material of the retaining wall includes at least one of an organic material, an inorganic material and a metal material.

4. The display panel according to claim 3, characterized in that: The cross section of the retaining wall perpendicular to the substrate is rectangular, I-shaped or inverted trapezoidal.

5. The display panel according to claim 1, characterized in that: The orthographic projection of the liquid crystal molecules on the substrate covers the orthographic projection of the light-emitting layer on the substrate.

6. The display panel according to claim 1, characterized in that: The liquid crystal layer is further doped with a blue powder material; Preferably, the liquid crystal layer is further doped with a blue powder material, and the doping ratio of the blue powder material in the liquid crystal layer is in the range of 3%-5%.

7. The display panel according to claim 1, characterized in that: The electrode pair includes a first electrode and a second electrode, the first electrode and the second electrode are arranged on the same side of the liquid crystal molecules, and the first electrode and the second electrode are arranged at intervals along a direction parallel to the substrate; Preferably, there are a plurality of electrode pairs, and the plurality of electrode pairs are arranged at intervals along a direction parallel to the substrate.

8. The display panel according to claim 7, characterized in that: The liquid crystal layer further comprises a first substrate and a second substrate sequentially arranged in a direction away from the substrate, wherein the liquid crystal molecules are sandwiched between the first substrate and the second substrate; Preferably, the first electrode and the second electrode are arranged at intervals along a direction parallel to the substrate on a side of the first substrate facing the second substrate; Preferably, the first substrate and the second substrate are transparent substrates; Preferably, the first substrate and the second substrate are made of the same material.

9. The display panel according to claim 1, characterized in that: There are multiple pixel areas, and the multiple pixel areas are arranged in an array; Preferably, the non-pixel region includes a wiring sub-region and a light-transmitting sub-region, and the wiring sub-region includes a signal line electrically connecting two adjacent light-emitting elements.

10. A display device, characterized in that: A display panel comprising any one of claims 1 to 9.

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