Display panel and display device

Abstract

The present application discloses a display panel and a display device, which relate to the display field, and include: a light-emitting unit, a first functional layer, and a second functional layer located between the light-emitting unit and the first functional layer, wherein the first functional layer emits light of different colors based on the light emitted by the light-emitting unit, and the second functional layer is used to adjust the transmittance of the light emitted by the light-emitting unit to the first functional layer, so that the light-emitting unit can emit light of different colors by controlling the transmittance of the light of different parts in the second functional layer, so that the display panel provided by the present application can realize full-color display based on the light-emitting unit of the same color. Moreover, the display panel provided by the present application only includes light-emitting units of one color, so that when it is manufactured, at most only one mass transfer process is required, the process is relatively simple, and the distance between adjacent light-emitting units is small, which is conducive to the realization of high resolution of the display panel.

Description

Technical Field

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

[0002] Micro-LED display screens have a simple structure. Compared with LCD, Micro-LED has advantages such as high brightness, high contrast, wide color gamut and fast response. Compared with OLED, Micro-LED has technical advantages of better reliability and longer life, thus becoming one of the main research objects of technicians in this field. However, the current production of Micro-LED display screens usually requires the use of mass transfer technology to transfer Micro-LED to the array substrate of the display screen. To achieve RGB full-color display, multiple mass transfer processes are required, resulting in the existing production process of Micro-LED display screens being more complicated and cumbersome. Summary of the invention

[0003] In view of the above problems, the present application provides a display panel and a display device to achieve the purpose of reducing the complexity and tediousness of the manufacturing process of the Micro-LED display screen. The specific solution is as follows:

[0004] A display panel, comprising:

[0005] An array substrate;

[0006] A plurality of light-emitting units located on a first side of the array substrate, the plurality of light-emitting units are light-emitting units of the same color, and light emitting areas of the light-emitting units are divided into a first area, a second area, and a third area;

[0007] a first functional layer located on the light-emitting side of the light-emitting unit, the first functional layer comprising a first portion corresponding to the first area, a second portion corresponding to the second area, and a third portion corresponding to the third area, the first portion forming a light of a first color based on the light emitted by the light-emitting unit, the second portion forming a light of a second color based on the light emitted by the light-emitting unit, and the third portion forming a light of a third color based on the light emitted by the light-emitting unit;

[0008] A second functional layer is located between the light-emitting unit and the first functional layer, the second functional layer includes a fourth part located between the light-emitting unit and the first part, a fifth part located between the light-emitting unit and the second part, and a sixth part located between the light-emitting unit and the third part, and the second functional layer is used to adjust the transmittance of light emitted from the light-emitting unit to the first functional layer.

[0009] A display device comprises any one of the display panels described above.

[0010] The display panel and display device provided in the embodiments of the present application include a light-emitting unit, a first functional layer, and a second functional layer located between the light-emitting unit and the first functional layer. The first functional layer emits light of different colors based on the light emitted by the light-emitting unit. The second functional layer is used to adjust the transmittance of the light emitted by the light-emitting unit to the first functional layer, so that the light-emitting unit can emit light of different colors by controlling the light transmittance of different parts of the second functional layer, so that the display panel provided in the embodiments of the present application can achieve full-color display based on light-emitting units of the same color.

[0011] Moreover, the display panel provided in the embodiment of the present application only includes light-emitting units of one color. Therefore, during production, only one mass transfer process is required at most. The process is relatively simple and the distance between adjacent light-emitting units is small, which is conducive to the realization of high resolution of the display panel. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] The above and other features, advantages and aspects of the embodiments of the present disclosure will become more apparent with reference to the following detailed description in conjunction with the accompanying drawings. Throughout the accompanying drawings, the same or similar reference numerals represent the same or similar elements. It should be understood that the drawings are schematic and the originals and elements are not necessarily drawn to scale.

[0013] Figure 1 A schematic diagram of the structure of a display panel provided in an embodiment of the present application;

[0014] Figure 2 A top view of a display panel provided in an embodiment of the present application;

[0015] Figure 3 A schematic diagram of the structure of another display panel provided in an embodiment of the present application;

[0016] Figure 4 A top view of another display panel provided in an embodiment of the present application;

[0017] Figure 5 A schematic diagram of the structure of another display panel provided in an embodiment of the present application;

[0018] Figure 6 A top view of another display panel provided in an embodiment of the present application;

[0019] Figure 7 A schematic diagram of the structure of another display panel provided in an embodiment of the present application;

[0020] Figure 8 A top view of another display panel provided in an embodiment of the present application;

[0021] Fig. 9 A schematic diagram of the structure of another display panel provided in an embodiment of the present application;

[0022] Fig.10 A schematic diagram of the structure of a light modulation module in a display panel provided in an embodiment of the present application;

[0023] Fig.11 A schematic diagram of the structure of another light modulation module in a display panel provided in an embodiment of the present application;

[0024] Fig.12 A schematic diagram of the structure of a light modulation module in another display panel provided in an embodiment of the present application;

[0025] Fig.13 A schematic diagram of the structure of a light modulation module in another display panel provided in an embodiment of the present application;

[0026] Fig.14 A schematic diagram of the structure of another display panel provided in an embodiment of the present application;

[0027] Fig.15 A schematic diagram of the structure of another display panel provided in an embodiment of the present application;

[0028] Fig.16 A schematic diagram of the structure of another display panel provided in an embodiment of the present application;

[0029] Fig.17 A top view of another display panel provided in an embodiment of the present application;

[0030] Fig.18 A schematic diagram of the structure of another display panel provided in an embodiment of the present application;

[0031] Fig.19 A schematic diagram of the structure of another display panel provided in an embodiment of the present application;

[0032] Fig. 20 A schematic diagram of the structure of a display device provided in an embodiment of the present application. DETAILED DESCRIPTION

[0033] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the embodiments in 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 making creative work are within the scope of protection of this application.

[0034] It is obvious to those skilled in the art that various modifications and changes can be made in the present application without departing from the spirit or scope of the present application. Therefore, the present application is intended to cover modifications and changes of the present application that fall within the scope of the corresponding claims (technical solutions for protection) and their equivalents. It should be noted that the implementation methods provided in the embodiments of the present application can be combined with each other without contradiction.

[0035] In order to make the above-mentioned objects, features and advantages of the present application more obvious and easy to understand, the present application is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0036] As mentioned in the background technology section, the manufacturing process of existing Micro-LED display screens is relatively complex and cumbersome.

[0037] In view of this, an embodiment of the present application provides a display panel, such as Figure 1 As shown, the display panel includes:

[0038] An array substrate 10;

[0039] A plurality of light-emitting units 20 located on one side of the array substrate 10, wherein the plurality of light-emitting units 20 are light-emitting units of the same color, and light emitting areas of the light-emitting units 20 are divided into a first area, a second area, and a third area;

[0040] The first functional layer 30 located on the light emitting side of the light emitting unit 20 is as follows: Figure 1 and Figure 2 As shown, the first functional layer 30 includes a first portion 31 corresponding to the first area, a second portion 32 corresponding to the second area, and a third portion 33 corresponding to the third area, the first portion 31 forms a light of a first color based on the light emitted by the light emitting unit 20, the second portion 32 forms a light of a second color based on the light emitted by the light emitting unit 20, and the third portion 33 forms a light of a third color based on the light emitted by the light emitting unit 20;

[0041] The second functional layer 40 is located between the light emitting unit 20 and the first functional layer 30, such as Figure 1 and Figure 2 As shown, the second functional layer 40 includes a fourth portion 41 located between the light emitting unit 20 and the first portion 31 , a fifth portion 42 located between the light emitting unit 20 and the second portion 32 , and a sixth portion 43 located between the light emitting unit 20 and the third portion 33 .

[0042] It should be noted that, in this embodiment, the second functional layer is used to adjust the transmittance of light emitted from the light emitting unit to the first functional layer. Specifically, the fourth portion is used to adjust the transmittance of light emitted from the light emitting unit to the first portion, the fifth portion is used to adjust the transmittance of light emitted from the light emitting unit to the second portion, and the sixth portion is used to adjust the transmittance of light emitted from the light emitting unit to the third portion.

[0043] Specifically, in one embodiment of the present application, the light-emitting unit may be a Micro-LED, a Mini-LED, or an OLED light-emitting unit. The present application does not limit this, and it depends on the specific circumstances.

[0044] Optionally, in one embodiment of the present application, Figure 3 and Figure 4 As shown, if the light emitting unit 20 needs to emit light of the first color, the fourth portion 41 transmits the light emitted by the light emitting unit 20 toward the first portion 31, the fifth portion 42 blocks the light emitted by the light emitting unit 20 toward the second portion 32, and the sixth portion 43 blocks the light emitted by the light emitting unit 20 toward the third portion 33; Figure 5 and Figure 6 As shown, if the light emitting unit 20 needs to emit light of a second color, the fourth portion 41 blocks the light emitted by the light emitting unit 20 toward the first portion 31, the fifth portion 42 transmits the light emitted by the light emitting unit 20 toward the second portion 32, and the sixth portion 43 blocks the light emitted by the light emitting unit 20 toward the third portion 33; Figure 7 and Figure 8 As shown, if the light emitting unit 20 needs to emit light of a third color, the fourth part 41 blocks the light emitted by the light emitting unit 20 toward the first part 31, the fifth part 42 blocks the light emitted by the light emitting unit 20 toward the second part 32, and the sixth part 43 transmits the light emitted by the light emitting unit 20 toward the third part 33.

[0045] It can be seen that the display panel provided in the embodiment of the present application can control the light transmittance of different parts of the second functional layer so that the light-emitting units emit light of different colors, thereby enabling the display panel provided in the embodiment of the present application to achieve full-color display based on light-emitting units of the same color.

[0046] Moreover, the display panel provided in the embodiment of the present application only includes light-emitting units of one color. Therefore, during production, only one mass transfer process is required at most, and even no mass transfer process is required. The light-emitting units can be directly bonded to the array substrate through a bonding process, and the process is relatively simple.

[0047] It should be noted that in the mass transfer process, it is usually necessary to first place a mask on the temporary substrate, the mask having an opening that exposes the area where the light-emitting unit is to be placed. Since the mask is made with a certain process precision, when the light-emitting unit is placed in the opening of the mask, it also has a certain alignment precision. Therefore, in order to smoothly place the light-emitting unit in the opening of the mask, the opening area of ​​the mask needs to be set larger than the area required by the light-emitting unit, thereby limiting the spacing between the light-emitting units. In addition, when the number of mass transfers is greater than or equal to two times, the vertical spacing between adjacent light-emitting units increases during the second transfer, resulting in problems such as core flipping and core standing in small-sized chips, which is not conducive to the realization of high resolution of display panels.

[0048] The display panel provided in the embodiment of the present application only includes light-emitting units of one color. During manufacturing, only one mass transfer process is required, or even no mass transfer process is required. The light-emitting units are directly bonded to the array substrate through a bonding process, thereby reducing the degree to which the distance between adjacent light-emitting units increases due to the process accuracy of the mask and the alignment accuracy of the mass transfer process, reducing the distance between adjacent light-emitting units on the array substrate, and facilitating the realization of high resolution of the display panel.

[0049] In one embodiment of the present application, Fig. 9 As shown, the light emitting unit 20 emits light of a first color, and the first part 31 is a transparent part that directly transmits the light emitted by the light emitting unit 20, so that the area can emit light of the first color; in this embodiment, the second part 32 includes a quantum dot layer of a second color to emit light of a second color based on the light of the first color emitted by the light emitting unit; the third part includes a quantum dot layer of a third color to emit light of a third color based on the light of the first color emitted by the light emitting unit, so that the display panel can achieve full-color display.

[0050] Optionally, in this embodiment, the first color can be blue, that is, the light emitting unit is a blue light emitting unit, or green, that is, the light emitting unit is a green light emitting unit, or red, that is, the light emitting unit is a red light emitting unit. This application does not limit this and it depends on the specific situation.

[0051] In another embodiment of the present application, continue as Figure 1As shown, the light emitting unit 20 emits light of a fourth color, and the first part 31 includes a quantum dot layer of a first color, which emits light of the first color based on the light of the fourth color emitted by the light emitting unit 20; in this embodiment, the second part 32 includes a quantum dot layer of a second color, which emits light of a second color based on the light of the fourth color emitted by the light emitting unit 20; the third part includes a quantum dot layer of a third color, which emits light of a third color based on the light of the fourth color emitted by the light emitting unit, so that the display panel can achieve full-color display.

[0052] Optionally, in one embodiment of the present application, the fourth color may be purple, that is, the light-emitting unit is a purple light-emitting unit, but the present application does not limit this and it depends on the specific circumstances.

[0053] Based on any of the above embodiments, in one embodiment of the present application, the fourth part, the fifth part and / or the sixth part include at least one light modulation module, that is, in this embodiment, at least one of the fourth part, the fifth part and the sixth part adopts the structure of a light modulation module to adjust the light transmittance between the light-emitting unit and the first functional layer.

[0054] Optionally, in one embodiment of the present application, Fig.10 As shown, the light modulation module includes:

[0055] The housing 50 includes: a first end face 51 and a second end face 52, a third end face 53 and a fourth end face 54 respectively connecting the first end face 51 and the second end face 52, that is, the third end face 53 and the fourth end face 54 are arranged opposite to each other, the third end face 53 connects the first end face 51 and the second end face 52, and the fourth end face 54 connects the first end face 51 and the second end face 2;

[0056] A plurality of electrophoresis units 55 are disposed in the housing. Optionally, the electrophoresis units 55 may be electrophoresis capsules;

[0057] A first electrode 56 is disposed on the housing 50 in an area close to the first end surface 51 , and a second electrode 57 is disposed on the second end surface 52 of the housing 50 .

[0058] It should be noted that, in other embodiments of the present application, the first electrode may also be arranged on the first end surface, and the second electrode may also be arranged on the second end surface, or the first electrode is arranged on a position of the shell close to the first end surface, and the second electrode is arranged on a position of the shell close to the second end surface, or the first electrode is arranged on the first end surface, and the second electrode is arranged on a position of the shell close to the second end surface. The present application does not impose any limitation on this, as long as the first electrode and the second electrode can control the movement of the electrophoretic unit in the light modulation module.

[0059] Specifically, in one embodiment of the present application, the electrophoretic capsule is a black electrophoretic capsule, that is, the electrophoretic capsule is provided with black light-shielding capsule particles, the capsule particles are positively or negatively charged, and can move under the action of an electric field, so that the light transmittance of the light modulation module can change from a white state to a black state.

[0060] In this embodiment, the light modulation module includes a first state and a second state. Fig.11 and Fig.12 As shown, in the first state, the first electrode 56 and the second electrode 57 are not applied with voltage, and the plurality of electrophoretic units 55 are distributed close to the first end surface 51 or the second end surface 52 of the housing 50, so that the light modulation module can transmit the light emitted by the light emitting unit; Fig.13 As shown, in the second state, a voltage signal is applied to the first electrode 56 and the second electrode 57, and the multiple electrophoretic units 55 are at least partially evenly distributed in the shell 50, so that the light modulation module can at least block part of the light emitted by the light-emitting unit.

[0061] It should be noted that, in this embodiment, when the number of electrophoretic units evenly distributed in the light modulation module is different, the light transmittance of the light modulation module is different, that is, the number of light emitted by the light modulation module through the light emitting unit is different. In specific applications, the display panel can control the number of electrophoretic units in the light modulation module that are evenly distributed by controlling the voltage on the first electrode and the second electrode, thereby controlling the light transmittance of the light modulation module.

[0062] Optionally, in an embodiment of the present application, in the light modulation module, the charges carried by the multiple electrophoretic units and the volumes of the electrophoretic units are the same, so that the display panel controls the movement of the multiple electrophoretic units through the first electrode and the second electrode.

[0063] In another embodiment of the present application, in the light modulation module, the number of charges carried by the multiple electrophoretic units is not exactly the same, so that the display panel can control the movement of electrophoretic units carrying different numbers of charges by controlling the different voltages on the first electrode and the second electrode, thereby adjusting the light transmittance of the light modulation module.

[0064] In another embodiment of the present application, in the light modulation module, the volumes of the multiple electrophoretic units are not exactly the same, so that the display panel can control the movement of electrophoretic units of different volumes by controlling the different voltages on the first electrode and the second electrode, thereby adjusting the light transmittance of the light modulation module.

[0065] In another embodiment of the present application, in the light modulation module, the number of charges carried by the multiple electrophoretic units are not completely the same, and the volumes of the multiple electrophoretic units are not completely the same, so that the display panel can control the movement of electrophoretic units carrying different numbers of charges and electrophoretic units of different volumes by controlling the different voltages on the first electrode and the second electrode, thereby adjusting the light transmittance of the light modulation module.

[0066] Based on any of the above embodiments, in one embodiment of the present application, Fig.14 As shown, the fourth portion 41, the fifth portion 42 and / or the sixth portion include at least two light modulation modules arranged along a first direction, and the first direction is a direction in which the light emitting unit 20 points to the first functional layer 30. In this embodiment, when at least part of the plurality of electrophoretic units are uniformly distributed in the light modulation module, light transmittances of different light modulation modules are different, so that the display panel can adjust the light transmittance between the light emitting unit and the first functional layer by controlling different light modulation modules to be in a working state, that is, by providing voltages to the first electrodes and the second electrodes of different light modulation modules.

[0067] It should be noted that, in the above embodiment, the fourth part, the fifth part and / or the sixth part include at least two light modulation modules arranged along the first direction, that is, at least one part of the fourth part, the fifth part and the sixth part includes at least two light modulation modules arranged along the first direction, such as only the fourth part may include at least two light modulation modules arranged along the first direction, only the fifth part may include at least two light modulation modules arranged along the first direction, only the sixth part may include at least two light modulation modules arranged along the first direction, at least two parts of the fourth part, the fifth part and the sixth part may include at least two light modulation modules arranged along the first direction, or the fourth part, the fifth part and the sixth part may all include at least two light modulation modules arranged along the first direction. The present application does not limit this and it depends on the specific circumstances.

[0068] It should also be noted that when the fourth part, the fifth part and / or the sixth part include at least two light modulation modules arranged along the first direction, at the same time, only one light modulation module in the fourth part, the fifth part and / or the sixth part can be in a working state, or two light modulation modules can be in a working state at the same time, or at least two light modulation modules can be in a working state at the same time. The present application does not limit this and it depends on the specific circumstances.

[0069] Based on any of the above embodiments, in one embodiment of the present application, Fig.15 As shown, the fourth part 41, the fifth part 42 and / or the sixth part include two light modulation modules arranged along a first direction, and the first direction is the direction in which the light emitting unit 20 points to the first functional layer 30; in this embodiment, at the same time, the two light modulation modules arranged along the first direction in the fourth part 41, the fifth part 42 and / or the sixth part are in working state at the same time. Optionally, in this embodiment of the application, in the first state, continue as Fig.15As shown, no voltage is applied to the first electrode and the second electrode, the electrophoretic unit in one of the light modulation modules is close to the first end surface of the shell, and multiple electrophoretic units in another light modulation module are distributed close to the second end surface, so that when the display panel controls the movement of the electrophoretic units in the light modulation modules through the first and second electrodes corresponding to each light modulation module, the electrophoretic unit in one light modulation module can be controlled to move from the first end surface to the second end surface, and the electrophoretic unit in another light modulation module can be controlled to move from the second end surface to the first end surface, thereby increasing the speed of switching the fourth part, the fifth part and / or the sixth part from the first state to the second state, and finally increasing the light adjustment rate of the fourth part, the fifth part and / or the sixth part, but the present application does not limit this and it depends on the specific situation.

[0070] On the basis of any of the above embodiments, in one embodiment of the present application, if the first electrode is located on the side of the light-emitting unit away from the array substrate, in this embodiment, the first electrode is a transparent electrode, such as made of one of ITO, IZO, ZnO, Ni-Au alloy and Ru-Au alloy, so as to reduce the influence of the setting of the first electrode on the light transmittance of the light modulation module. However, the present application does not limit this, and it depends on the setting position of the first electrode. If the first electrode is set in the non-light emitting area of ​​the light modulation module, the first electrode can also be set as a non-transparent electrode, such as a metal electrode, to reduce the resistivity of the first electrode, depending on the specific situation.

[0071] Similarly, if the second electrode is located on the side of the light emitting unit away from the array substrate, in this embodiment, the second electrode is a transparent electrode, such as made of one of ITO, IZO, ZnO, Ni-Au alloy and Ru-Au alloy, so as to reduce the influence of the setting of the second electrode on the light transmittance of the light modulation module. However, this application does not limit this, and it depends on the setting position of the second electrode. If the second electrode is set in the non-light emitting area of ​​the light modulation module, the second electrode can also be set as a non-transparent electrode, such as a metal electrode, to reduce the resistivity of the second electrode, depending on the specific situation.

[0072] The above embodiments take the example that at least one of the fourth part, the fifth part and the sixth part includes at least one light modulation module, that is, at least one of the fourth part, the fifth part and the sixth part adopts the structure of the light modulation module to adjust the light transmittance between the light emitting unit and the first functional layer, as an example to describe the display panel provided by the embodiment of the present application. In other embodiments of the present application, at least one of the fourth part, the fifth part and the sixth part can also adopt a liquid crystal box or other structures to adjust the light transmittance between the light emitting unit and the first functional layer, which is not limited in the present application and depends on the specific situation.

[0073] The following describes a method of using a liquid crystal box to adjust the light transmittance between the light emitting unit and the first functional layer in at least one of the fourth part, the fifth part and the sixth part.

[0074] Optionally, in one embodiment of the present application, Fig.16 and Fig.17 As shown, the fourth part 41, the fifth part 42 and / or the sixth part include a liquid crystal box 61, so as to adjust the light transmittance between the light emitting unit 20 and the first functional layer 30 through the liquid crystal box 61. Since the light emitted by the light emitting unit 20 is circularly polarized light 41, the liquid crystal box 61 can completely block the light of linear polarized light. Therefore, in one embodiment of the present application, when the fourth part, the fifth part 42 and / or the sixth part include a liquid crystal box 61, the display panel also includes a polarizer 62 located between the second functional layer and the light emitting unit 20. In this embodiment, the display panel first uses the polarizer 62 to emit linear polarized light of the same color based on the light emitted by the light emitting unit 20, and then uses the liquid crystal box 61 to block the light emitted by the polarizer 63, so as to adjust the light transmittance between the light emitting unit 20 and the first functional layer 30 through the combination of the liquid crystal box and the polarizer.

[0075] Based on any of the above embodiments, in one embodiment of the present application, continue as follows Figure 1 As shown, the light emitting area of ​​the light emitting unit 20 includes the side surface of the light emitting unit 20 and the surface of the light emitting unit 20 away from the array substrate 10, that is, the light emitting area of ​​the light emitting unit 20 is partially located on the surface of the side of the light emitting unit 20 away from the array substrate, and partially located on the side surface of the light emitting unit 20.

[0076] Based on the above embodiment, in one embodiment of the present application, continue as follows Figure 1As shown, the display panel also includes: a third electrode 71 electrically connected to the first pole of the light-emitting unit 20 and a fourth electrode 72 electrically connected to the second pole of the light-emitting unit 20. Optionally, in this embodiment, the third electrode 71 and the fourth electrode 72 are located on the side of the light-emitting unit 20 facing the array substrate 10, so that the setting of the third electrode 71 and the fourth electrode 72 will not affect the area of ​​the light emitting region of the light-emitting unit 20, but the present application does not limit this and it depends on the specific circumstances.

[0077] In another embodiment of the present application, Fig.16 As shown, the light emitting area of ​​the light emitting unit 20 includes the side of the light emitting unit 20, but does not include the side surface of the light emitting unit 20 away from the array substrate 10, that is, the light emitting area of ​​the light emitting unit 20 is only the side of the light emitting unit 20. The present application does not limit this, and it depends on the specific situation. It should be noted that in this embodiment, when the light emitting area of ​​the light emitting unit only includes the side of the light emitting unit, the first functional layer and the second functional layer can be only arranged on the side of the light emitting unit, and no longer need to be arranged on the side of the light emitting unit away from the array substrate, thereby helping to reduce the overall thickness of the display panel and meet the requirements of ultra-thin display.

[0078] Optionally, in an embodiment of the present application, when the light emitting area of ​​the light emitting unit only includes the side of the light emitting unit, the size of the light emitting unit is no more than 5 μm in the direction parallel to the plane where the array substrate is located, so as to reduce the area of ​​the light emitting unit away from the array substrate, so that the array substrate of the same area can accommodate more light emitting units, thereby facilitating the realization of high resolution. However, the present application does not limit this, and it depends on the specific situation.

[0079] It can be seen that, in this embodiment, when the light emitting area of ​​the light emitting unit only includes the side surface of the light emitting unit, it is beneficial for the display panel to achieve ultra-thin display and high-resolution display.

[0080] Based on the above embodiment, in one embodiment of the present application, continue as follows Fig.16 The display panel shown also includes: a third electrode 71 electrically connected to the first pole of the light-emitting unit 20 and a fourth electrode 72 electrically connected to the second pole of the light-emitting unit 20. In the present embodiment, since the surface of the light-emitting unit 20 away from the array substrate 10 is no longer the light emitting area of ​​the light-emitting unit 20, in the present embodiment, the third electrode 71 can be located on the side of the light-emitting unit 20 facing the array substrate 10, and the fourth electrode 72 can be located on the side of the light-emitting unit 20 away from the array substrate 10.

[0081] Optionally, in one embodiment of the present application, when the light-emitting unit is an LED, the LED can be a face-up LED, that is, the third electrode and the fourth electrode are both located on the side of the light-emitting unit away from the array substrate; it can also be a flip-chip LED, that is, the third electrode and the fourth electrode are both located on the side of the light-emitting unit facing the array substrate; it can also be a vertical LED, that is, one of the third electrode and the fourth electrode is located on the side of the light-emitting unit facing the array substrate, and the other electrode is located on the side of the light-emitting unit away from the array substrate. The present application does not limit this, and it depends on the specific circumstances.

[0082] It should be noted that in this embodiment, in the direction perpendicular to the plane where the array substrate is located, the shape of the light-emitting unit can be circular, square, triangular or other shapes. This application does not limit this and it depends on the specific situation.

[0083] In practical applications, the light emission direction of the light emitting unit includes not only the lateral direction of the light emitting unit, but also the side of the light emitting unit away from the array substrate. Therefore, based on the above embodiments, in one embodiment of the present application, the fourth electrode is a high reflectivity electrode to reflect the light emitted by the light emitting unit to the side away from the array substrate back to the light emitting unit, and at least part of the light is emitted from the side of the light emitting unit through reflection, refraction, etc. inside the light emitting unit, thereby improving the light emission rate of the light emitting unit. However, the present application does not limit this. In other embodiments of the present application, the fourth electrode may also be a non-high reflectivity electrode. In this case, the display panel may also include a high reflectivity layer located at the fourth electrode away from the array substrate to reflect the light emitted by the light emitting unit to the side away from the array substrate back to the light emitting unit, depending on the specific situation.

[0084] Optionally, in one embodiment of the present application, when the fourth electrode is a high reflectivity electrode, the material of the fourth electrode may be a high reflectivity metal material, such as Au, Ag or Pt, etc. The present application does not impose any limitation on this, and it depends on the specific circumstances.

[0085] The display panel provided in the embodiment of the present application is described below by taking the fourth electrode as a high reflectivity electrode as an example.

[0086] Specifically, in one embodiment of the present application, Fig.18As shown, the light-emitting unit 20 includes: a light-emitting layer 21, a first semiconductor layer 22 located on the side of the light-emitting layer 21 facing the array substrate 10, and a second semiconductor layer 23 located on the side of the light-emitting layer 20 facing the fourth electrode 72, wherein the light-emitting layer 21 can be a quantum well light-emitting layer.

[0087] Optionally, based on the above embodiments, in one embodiment of the present application, the second semiconductor layer 23 has a protrusion on the side facing the fourth electrode 72, and the fourth electrode 72 has a groove on the side facing the second semiconductor layer 23, and the protrusion is located in the groove, so that the contact surface between the groove and the protrusion is used to improve the light reflection ability of the contact surface between the fourth electrode 72 and the second semiconductor layer 23, thereby improving the light emission rate of the side of the light-emitting unit, but the present application does not limit this, and it depends on the specific situation.

[0088] In another embodiment of the present application, Fig.19 As shown, the surface of the second semiconductor layer 23 facing the fourth electrode 72 is flat. In this embodiment, the display panel also includes: a transparent boss 80 located between the second semiconductor layer 23 and the fourth electrode 72. In this embodiment, the fourth electrode 72 has a groove on the side facing the second semiconductor layer 23, and the boss is located in the groove, so that the contact surface between the groove and the boss is used to improve the light reflection ability of the fourth electrode 72, thereby improving the light emission rate of the side of the light-emitting unit, but the present application does not limit this, and it depends on the specific situation.

[0089] Optionally, in one embodiment of the present application, the inner surface of the groove is an arc-shaped surface, so that the contact surface between the protrusion in the second semiconductor layer and the groove in the fourth electrode is an arc-shaped reflective surface, and then the principle of the reflective bowl is utilized to improve the light reflection ability of the contact surface between the fourth electrode and the second semiconductor layer, so as to improve the light emission rate of the side of the light-emitting unit, but the present application is not limited to this. In other embodiments of the present application, the inner surface of the groove may also be a folded surface or an inclined surface, depending on the specific circumstances.

[0090] In addition, an embodiment of the present application further provides a display device, which includes a display panel provided by any of the above embodiments. Fig. 20As shown, the display device can be a mobile phone, a tablet computer, a wearable device, a vehicle-mounted device, an augmented reality (AR) / virtual reality (VR) device, a laptop computer, an ultra-mobile personal computer (UMPC), a netbook, a personal digital assistant (PDA), etc., and the embodiments of the present application do not impose any restrictions on this.

[0091] In summary, the display panel and display device provided in the embodiments of the present application include a light-emitting unit, a first functional layer, and a second functional layer located between the light-emitting unit and the first functional layer. The first functional layer emits light of different colors based on the light emitted by the light-emitting unit. The second functional layer is used to adjust the transmittance of light emitted by the light-emitting unit to the first functional layer, so that the light-emitting unit can emit light of different colors by controlling the light transmittance of different parts of the second functional layer, so that the display panel provided in the embodiments of the present application can achieve full-color display based on light-emitting units of the same color.

[0092] Moreover, the display panel provided in the embodiment of the present application only includes light-emitting units of one color. Therefore, during production, only one mass transfer process is required at most. The process is relatively simple and the distance between adjacent light-emitting units is small, which is conducive to the realization of high resolution of the display panel.

[0093] In this specification, each embodiment is described in a progressive, parallel, or progressive and parallel manner. Each embodiment focuses on the differences from other embodiments, and the same or similar parts between the embodiments can be referred to each other. For the device disclosed in the embodiment, since it corresponds to the method disclosed in the embodiment, the description is relatively simple, and the relevant parts can be referred to the method part.

[0094] It should be noted that in the description of the present application, it should be understood that the description of the drawings and embodiments is illustrative rather than restrictive. The same reference numerals throughout the embodiments of the specification identify the same structure. In addition, for the sake of understanding and ease of description, the drawings may exaggerate the thickness of some layers, films, panels, regions, etc. It is also understood that when an element such as a layer, film, region, or substrate is referred to as "on" another element, the element may be directly on the other element or there may be an intermediate element. In addition, "on" refers to positioning an element on or below another element, but does not essentially refer to positioning on the upper side of another element according to the direction of gravity.

[0095] The terms "upper", "lower", "top", "bottom", "inner", "outer", etc. indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present application. When a component is considered to be "connected" to another component, it may be directly connected to the other component or there may be a centrally arranged component at the same time.

[0096] It should also be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "comprises", "comprising" or any other variants thereof are intended to cover non-exclusive inclusion, so that an article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such article or device. In the absence of further restrictions, the elements defined by the sentence "comprising a ..." do not exclude the existence of other identical elements in the article or device including the above elements.

[0097] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present application. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application will not be limited to the embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A display panel, characterized in that: include: An array substrate; A plurality of light-emitting units located on a first side of the array substrate, the plurality of light-emitting units are light-emitting units of the same color, and light emitting areas of the light-emitting units are divided into a first area, a second area, and a third area; a first functional layer located on the light-emitting side of the light-emitting unit, the first functional layer comprising a first portion corresponding to the first area, a second portion corresponding to the second area, and a third portion corresponding to the third area, the first portion forming a light of a first color based on the light emitted by the light-emitting unit, the second portion forming a light of a second color based on the light emitted by the light-emitting unit, and the third portion forming a light of a third color based on the light emitted by the light-emitting unit; A second functional layer is located between the light-emitting unit and the first functional layer, the second functional layer includes a fourth part located between the light-emitting unit and the first part, a fifth part located between the light-emitting unit and the second part, and a sixth part located between the light-emitting unit and the third part, and the second functional layer is used to adjust the transmittance of light emitted from the light-emitting unit to the first functional layer.

2. The display panel according to claim 1, characterized in that: The light emitting unit emits light of a first color, the first portion is a transparent portion, the second portion includes a quantum dot layer of a second color, and the third portion includes a quantum dot layer of a third color.

3. The display panel according to claim 1, characterized in that: The light emitting unit emits light of a fourth color, the first portion includes a quantum dot layer of a first color, the second portion includes a quantum dot layer of a second color, and the third portion includes a quantum dot layer of a third color.

4. The display panel according to claim 1, characterized in that: The fourth part, the fifth part and / or the sixth part include at least one light modulation module, and the light modulation module includes: A housing, the housing comprising: a first end surface and a second end surface, a third end surface and a fourth end surface respectively connecting the first end surface and the second end surface; A plurality of electrophoresis units disposed in the housing; A first electrode disposed in a region of the housing close to the first end surface and a second electrode disposed on the second end surface of the housing; The light modulation module includes a first state and a second state. In the first state, no voltage is applied to the first electrode and the second electrode, and the multiple electrophoretic units are distributed close to the first end surface or the second end surface of the shell; in the second state, a voltage signal is applied to the first electrode and the second electrode, and the multiple electrophoretic units are at least partially evenly distributed in the shell.

5. The display panel according to claim 4, characterized in that: In the light modulation module, the number of charges carried by the multiple electrophoretic units and the volumes of the multiple electrophoretic units are the same.

6. The display panel according to claim 4, characterized in that: In the light modulation module, the quantities of charges carried by the multiple electrophoresis units are not completely the same.

7. The display panel according to claim 4, characterized in that: In the light modulation module, the volumes of the multiple electrophoresis units are not completely the same.

8. The display panel according to claim 4, characterized in that: The fourth part, the fifth part and / or the sixth part include at least two light modulation modules arranged along a first direction, where the first direction is a direction in which the light emitting unit points to the first functional layer; When at least some of the multiple electrophoretic units are evenly distributed in the light modulation module, light transmittances of different light modulation modules are different.

9. The display panel according to claim 4, characterized in that: The fourth part, the fifth part and / or the sixth part include two light modulation modules arranged along a first direction, where the first direction is a direction in which the light emitting unit points to the first functional layer; In the first state, no voltage is applied to the first electrode and the second electrode, the multiple electrophoretic units in one light modulation module are close to the first end surface of the shell, and the multiple electrophoretic units in the other light modulation module are distributed close to the second end surface.

10. The display panel according to claim 4, characterized in that: The first electrode and / or the second electrode is a transparent electrode.

11. The display panel according to claim 1, characterized in that: The fourth portion, the fifth portion and / or the sixth portion include a liquid crystal box, and the display panel further includes: a polarizer located between the second functional layer and the light-emitting unit.

12. The display panel according to claim 1, characterized in that: The light emitting area of ​​the light emitting unit includes a side surface of the light emitting unit and a surface of the light emitting unit away from the array substrate.

13. The display panel according to claim 12, characterized in that: The display panel further includes: a third electrode electrically connected to the first electrode of the light emitting unit and a fourth electrode electrically connected to the second electrode of the light emitting unit, and the third electrode and the fourth electrode are located on a side of the light emitting unit facing the array substrate.

14. The display panel according to claim 1, characterized in that: The light emitting area of ​​the light emitting unit is a side surface of the light emitting unit.

15. The display panel according to claim 14, characterized in that: The display panel also includes: a third electrode electrically connected to the first pole of the light-emitting unit and a fourth electrode electrically connected to the second pole of the light-emitting unit, the third electrode is located on the side of the light-emitting unit facing the array substrate, the fourth electrode is located on the side of the light-emitting unit away from the array substrate, and the fourth electrode is a high reflectivity electrode.

16. The display panel according to claim 15, characterized in that: The light-emitting unit includes: a light-emitting layer, a first semiconductor layer located on the side of the light-emitting layer facing the array substrate, and a second semiconductor layer located on the side of the light-emitting layer facing the fourth electrode, the second semiconductor layer has a protrusion on the side facing the fourth electrode, and the fourth electrode has a groove on the side facing the second semiconductor layer, and the protrusion is located in the groove.

17. The display panel according to claim 16, characterized in that: The inner surface of the groove is an arc-shaped surface.

18. A display device, characterized in that: A display panel comprising any one of claims 1-17.

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