Display panel and display device

Abstract

The present application relates to a display panel and a display device. The display panel includes a first substrate, a second substrate, a display area located between the first and second substrates, and a backlight module located on a side of the second substrate away from the first substrate. The display area includes a liquid crystal layer, and the backlight module includes a light source layer. The light source includes a plurality of micro-LED lamp beads arranged in multiple rows and columns, and a self-luminous pixel layer sandwiched between each adjacent two of the micro-LED lamp beads. The self-luminous pixel layer is constructed as a single layer structure, and each self-luminous pixel layer is configured to display one of red, green, and blue colors under the combined stimulation of outdoor light energy and / or heat energy generated by the light emission and heating of each micro-LED lamp bead. A new pixel unit is formed between each one, two, or three self-luminous pixel layers and the sub-pixels where the adjacent micro-LED lamp beads are located. The new pixel unit overlaps or is arranged to overlap with the original pixel unit.

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] Displays, as display devices, generally include LCDs, OLEDs, QLEDs, and micro-LED displays. Factors that determine display quality generally include resolution and PPI. Micro-LEDs, as a next-generation backlight technology, are being widely adopted and explored within the industry. It's important to note that micro-LED backlighting is a key innovation within the LCD display technology pipeline.

[0003] In the field of micro-LED backlighting, unlike traditional backlight products, the light emission of micro-LEDs is based on the semiconductor PN junction. When a forward voltage is applied, electrons and holes recombine in the active area to emit light. However, in reality, not all electrons and holes can effectively recombine to emit light. Some electrons will interact with crystal defects and convert energy into heat energy in the form of non-radiative recombination. Among them, micro-LEDs use a large number of chips densely arranged to achieve high resolution and high brightness. Such a layout generates more heat per unit area, and due to limited heat dissipation space, heat is easily accumulated. Although the light guide plate can evenly distribute the light, it absorbs and scatters some of the light. The absorbed light energy will eventually be converted into heat energy, causing a large part of the energy generated by the micro-LED to be lost in the form of heat energy. Summary of the Invention

[0004] The present application provides a display panel and a display device to solve the technical problem in the above-mentioned prior art that a large part of the energy of micro-light emitting diodes is converted into heat energy, resulting in serious energy loss.

[0005] The display panel provided by the present invention includes: a first substrate, a second substrate, and a display area and a backlight module located between the first substrate and the second substrate, wherein the display area includes a liquid crystal layer; the backlight module includes a light source layer, the light source layer includes a plurality of micro-light-emitting diode lamp beads arranged in multiple rows and columns and an autonomous light-emitting pixel layer sandwiched between each adjacent two of the micro-light-emitting diode lamp beads, the autonomous light-emitting pixel layer is constructed as a thermoluminescent structure and / or a photoluminescent structure, and the autonomous light-emitting pixel layer is configured to display one of red, green, and blue under the joint excitation of outdoor light energy and / or heat energy generated by the light emission and heating of each of the micro-light-emitting diode lamp beads; a new pixel unit is formed between each of the autonomous light-emitting pixel layers and the sub-pixel where the adjacent micro-light-emitting diode lamp beads are located; the new pixel unit is overlapped or overlapped with the original pixel unit.

[0006] Wherein, the display panel further includes a light-transmitting component, which includes a structured incident lens, a one-way high-transmittance film group and an upper polarizer, wherein the upper polarizer is covered on the side of the first substrate away from the second substrate, the one-way high-transmittance film group is covered on the side of the upper polarizer away from the first substrate, the one-way high-transmittance film group includes a first one-way high-transmittance film and a plurality of second one-way high-transmittance films arrayed and embedded in the first one-way high-transmittance film; a plurality of structured incident lenses are provided, each of the structured incident lenses is covered on the side of the one-way high-transmittance film group away from the upper polarizer, and each of the structured incident lenses is arranged at intervals, each of the structured incident lenses is respectively arranged opposite to one of the autonomous light-emitting pixel layers, and every two of the second one-way high-transmittance films and the first one-way high-transmittance film sandwiched therebetween are correspondingly arranged between each structured incident lens and each of the autonomous light-emitting pixel layers, and the first one-way high-transmittance film is used to block ambient light from being transmitted to the liquid crystal layer;

[0007] The ambient light sequentially passes through each of the structural incident lenses, each of the second one-way high-transmittance films, the liquid crystal layer, and is transmitted to each of the autonomous light-emitting pixel layers, so as to enable each of the autonomous light-emitting pixel layers to display one of the colors of red, green, and blue under the stimulation of the outdoor light energy of the ambient light.

[0008] In which, the structured incident lens includes a plane area and a bevel area located on both sides of the plane area. The bevel area on each side is arranged opposite to a second one-way high-transmittance film, so as to allow the ambient light to be transmitted through the bevel area, the second one-way high-transmittance film, and the liquid crystal layer in sequence to each of the autonomous light-emitting pixel layers.

[0009] Wherein, the backlight module further includes a backlight substrate and a first transparent resin layer and a second transparent resin layer stacked on the side of the backlight substrate facing the second substrate;

[0010] Each of the micro-LED lamp beads is mounted on the backlight substrate and embedded between the first transparent resin layer and the second transparent resin layer. Each of the autonomous light-emitting pixel layers is embedded in the second transparent resin layer. Heat energy generated by each of the micro-LED lamp beads is transferred to each of the autonomous light-emitting pixel layers through the first transparent resin layer and / or the second transparent resin layer.

[0011] At least a portion of the structure of the self-luminous pixel layer is in contact with the first transparent resin layer.

[0012] The display area further includes a lower polarizer, which is covered on a side of the second substrate away from the first substrate. The backlight module further includes a first film and a second film, wherein the first film is covered on a side of the lower polarizer away from the second substrate, and the second film is covered on a side of the first film away from the lower polarizer.

[0013] The first film comprises a plurality of prism brightness enhancement areas arranged in an array and spaced apart from each other, and the second film comprises a plurality of diffusion areas arranged in an array and spaced apart from each other;

[0014] Each of the prism brightening areas and each of the diffusion areas are respectively arranged opposite to one of the micro-LED lamp beads and at least a portion of the first one-way high-transmittance film. Each of the prism brightening areas and each of the diffusion areas are respectively used to transmit the light source of the micro-LED lamp bead to the liquid crystal layer, and to allow the display image of the liquid crystal layer to be emitted into the user's field of view through the first one-way high-transmittance film.

[0015] The first film further comprises a plurality of first transparent areas arranged in an array and spaced apart, each first transparent area being sandwiched between two adjacent prism brightness enhancement areas, and the second film further comprises a plurality of second transparent areas arranged in an array and spaced apart, each second transparent area being sandwiched between two adjacent diffusion areas;

[0016] The ambient light is transmitted to each of the autonomous light-emitting pixel layers through each of the structural incident lenses, each of the second one-way high-transmittance films, the display area, each of the first transparent areas, and each of the second transparent areas.

[0017] The backlight module further includes a third substrate and a heat-conducting layer covering the side of the third substrate facing the second substrate, and the heat-conducting layer is sandwiched between the third substrate and the backlight substrate;

[0018] The display area also includes multiple color filter layers, each of which is embedded in the first PI alignment layer and in contact with the first substrate. Each of the color filter layers is arranged opposite to each of the micro-light-emitting diode lamp beads. The white light emitted by each of the micro-light-emitting diode lamp beads passes through each of the color filter layers and emits one of the colors of red, green, and blue to the first unidirectional high-transmittance film and into the user's line of sight.

[0019] Among them, the autonomous luminous pixel layer is constructed from Mg2SiO4:RE series thermoluminescent materials and / or RGB different color photoluminescent materials, and the Mg2SiO4:RE is formed by doping rare earth elements into the Mg2SiO4 characteristics, and the rare earth elements include any one of Ce, Pr, Nd, Sm, Eu, Tb, Dy, Er, Tm or Yb.

[0020] In which, the backlight module also includes a packaging frame, which wraps the first substrate, the second substrate, the display area between the first substrate and the second substrate, and the periphery of the backlight module located on the side of the second substrate away from the first substrate, and is used to assemble the first substrate, the second substrate, the display area and the backlight module into one.

[0021] The display device provided by the present invention includes the above-mentioned display panel.

[0022] The above technical solution provided by the embodiment of the present application has the following advantages compared with the prior art:

[0023] The display panel and display device provided in the embodiments of the present application add an autonomous light-emitting pixel layer to the light source layer of the micro-LED backlight module, that is, an autonomous light-emitting pixel layer is set in the area between every two micro-LED lamp beads. It should be pointed out that the autonomous light-emitting pixel layer is constructed as a thermoluminescent structure and / or a photoluminescent structure. The thermoluminescent structure and / or photoluminescent structure here can be understood as a structure composed of thermoluminescent materials and / or photoluminescent materials. In this way, the independent light-emitting pixels can be excited by the joint excitation of outdoor light energy and / or the heat energy generated by the light emission and heating of each micro-LED lamp bead. The light pixel layer displays one of the colors red, green, and blue respectively; and the autonomous light-emitting pixel layer can perform the two functions of luminescence and color display under the stimulation of ambient light and / or heat energy generated by the light emission and heating of micro-LED lamp beads without the need for white light from the backlight module, forming a new pixel unit between the atomic pixel, and the new pixel unit can be overlapped or overlapped with the original pixel unit. In this way, the display effect of the display panel can be improved by increasing the number of pixel units or increasing the number of sub-pixels in the original pixel unit. The display effect here can be to improve the resolution or to improve the display brightness. In addition, in outdoor scenes with ambient light, turning on the backlight module so that the micro-LED lamp beads continue to emit light and generate heat can enable the autonomous light-emitting pixel layer to perform the two functions of luminescence and color display under the stimulation of the heat energy, thereby enabling the micro-LED display panel to enhance the display effect in outdoor scenes with ambient light. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the invention and, together with the description, serve to explain the principles of the invention.

[0025] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0026] One or more embodiments are exemplarily illustrated by pictures in the corresponding drawings. These exemplifications do not constitute limitations on the embodiments. Elements with the same reference numerals in the drawings are represented as similar elements. Unless otherwise stated, the figures in the drawings do not constitute proportional limitations.

[0027] Figure 1 Schematic diagram of the cross-sectional structure of the display panel provided in the embodiment of the present application Figure 1 (Showing the incident path of ambient light transmitted to the autonomous light-emitting pixel layer;

[0028] Figure 2 Schematic diagram of the cross-sectional structure of the display panel provided in the embodiment of the present application Figure 2 (The color with brightness displayed on the self-luminous pixel layer is emitted to the outdoors through the structured incident lens);

[0029] Figure 3 A schematic diagram of the main structure of the second film of the display panel provided in an embodiment of the present application;

[0030] Figure 4 Schematic diagram of the main structure of the first film of the display panel provided in the embodiment of the present application Figure 4 ;

[0031] Figure 5 The first sub-pixel arrangement of the autonomous light-emitting pixel layer and the micro-light-emitting diode lamp beads in the display panel provided in the embodiment of the present application;

[0032] Figure 6 The second sub-pixel arrangement of the autonomous light-emitting pixel layer and the micro-light-emitting diode lamp beads in the display panel provided in the embodiment of the present application;

[0033] Figure 7 This is a third sub-pixel arrangement of the autonomous light-emitting pixel layer and the micro-light-emitting diode lamp beads in the display panel provided in the embodiment of the present application.

[0034] Description of reference numerals:

[0035] 100. Display panel; 1. First substrate; 2. Second substrate; 3. Display area; 4. Backlight module; 5. Transparent component; 31. Liquid crystal layer; 32. Lower polarizer; 33. First PI alignment layer; 34. Second PI alignment layer; 35. TFT thin-film transistor; 36. Color filter layer; 41. Light source layer; 42. Backlight substrate; 43. First transparent resin layer; 44. Second transparent resin layer; 45. First diaphragm; 46. Second diaphragm; 47. Third substrate; 48. Thermal conductive layer; 49. Package frame; 451. Prism brightening area; 452. First transparent area; 461. Diffusion area; 462. Second transparent area; 411. Micro-LED lamp beads; 412. Autonomous light-emitting pixel layer; 51. Structured incident lens; 52. One-way high-transmittance film group; 53. Upper polarizer; 521. First one-way high-transmittance film; 522. Second one-way high-transmittance film; 511. Plane area; 512. Bevel area; A. New pixel unit. DETAILED DESCRIPTION

[0036] To make the purpose, technical solutions, and advantages of the embodiments of this application more clear, the technical solutions in the embodiments of this application will be clearly and completely described below in conjunction with the drawings in the embodiments of this application. Obviously, the described embodiments are part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0037] The disclosure below provides many different embodiments or examples for implementing different configurations of the present invention. To simplify the disclosure of the present invention, the components and configurations of specific examples are described below. Of course, these are merely examples and are not intended to limit the present invention. In addition, the present invention may repeat reference numerals and / or letters in different examples. Such repetition is for the purpose of simplicity and clarity and does not in itself indicate the relationship between the various embodiments and / or configurations discussed.

[0038] For ease of description, spatially relative terms may be used herein to describe the relative position or movement of one element or feature relative to another element or feature as shown in the figures, such as "inside", "outside", "inside", "outside", "below", "beneath", "above", "above", "front", "back", etc. Such spatially relative terms are intended to include different orientations of the device in use or operation other than the orientation depicted in the figures. For example, if the device in the figures undergoes a position flip or a change in posture or a change in motion state, then these directional indications will also change accordingly. For example, an element described as "below" or "below" another element or feature will then be oriented as "above" or "above" another element or feature. Thus, the example term "below" can include both above and below orientations. The device can be oriented otherwise (rotated 90 degrees or in other orientations) and the spatially relative descriptions used herein have been interpreted accordingly.

[0039] The energy loss based on micro-light emitting diodes is large, and a large part of the energy is converted into heat energy, resulting in serious energy loss.

[0040] In order to alleviate the above-mentioned problems, the embodiments of the present application provide a display panel and a display device, which can utilize the thermal energy converted by micro-light-emitting diodes to stimulate the properties of thermoluminescent materials and photoluminescent materials, thereby obtaining a new micro-light-emitting diode outdoor display screen that can reduce power consumption and achieve high resolution. It utilizes outdoor light energy and / or thermal energy excitation of micro-light-emitting diodes to increase the number of display pixels or improve the display brightness of each display pixel, thereby improving the display resolution. A special outdoor display structure.

[0041] refer to Figure 1-Figure 7The present application provides a display panel 100, comprising: a first substrate 1, a second substrate 2, a display area 3 and a backlight module 4 located between the first substrate 1 and the second substrate 2. For example, the first substrate 1 and the second substrate 2 can both be glass substrates, which have light-transmitting properties. Furthermore, the display area 3 includes a liquid crystal layer 31, which for example includes a plurality of liquid crystal molecules. The backlight module 4 includes a light source layer 41, which includes a plurality of micro-light-emitting diode lamp beads 411 arranged in multiple rows and columns and sandwiched between each of the light source layers. The autonomous light-emitting pixel layer 412 between two adjacent micro-LED lamp beads 411 is constructed as a thermoluminescent structure and / or a photoluminescent structure. The autonomous light-emitting pixel layer 412 is configured to display different RGB colors under the joint excitation of outdoor light energy and / or the heat energy generated by the light emission and heating of each micro-LED lamp bead 411; a new pixel unit A is formed between each main light-emitting pixel layer 412 and the sub-pixel where the adjacent micro-LED lamp bead 411 is located; the new pixel unit A is overlapped or coincided with the original pixel unit.

[0042] The display panel 100 of the embodiment of the present application is used, and an autonomous light-emitting pixel layer 412 is added to the light source layer 41 of the micro-light-emitting diode backlight module 4, that is, an autonomous light-emitting pixel layer 412 is set in the area between every two micro-light-emitting diode lamp beads 411. It should be pointed out that the autonomous light-emitting pixel layer 412 is constructed as a thermoluminescent structure and / or a photoluminescent structure. The thermoluminescent structure and / or photoluminescent structure here can be understood as a structure composed of thermoluminescent materials and / or photoluminescent materials. In this way, under the joint excitation of outdoor light energy and / or heat energy generated by the light emission and heating of each micro-light-emitting diode lamp bead 411, each main light-emitting pixel layer 412 can display one of the colors of red, green and blue.

[0043] Furthermore, the autonomous luminous pixel layer 412 can perform the two functions of luminescence and color display under the stimulation of ambient light and / or heat energy generated by the luminescence and heating of the micro-LED lamp beads 411 without the need for white light irradiation from the backlight module 4, thereby forming a new pixel unit A between the atomic pixel, and the new pixel unit A can be overlapped or overlapped with the original pixel unit. In this way, the display effect of the display panel 100 can be improved by increasing the number of pixel units or increasing the number of sub-pixels in the original pixel unit. The display effect here can be to improve the resolution or to improve the display brightness. In addition, in an outdoor scene with ambient light, turning on the backlight module 4 so that the micro-LED lamp beads 411 continue to emit light and generate heat can enable the autonomous luminous pixel layer 412 to perform the two functions of luminescence and color display under the stimulation of the heat energy, thereby enabling the micro-LED display panel 100 to enhance the display effect in an outdoor scene with ambient light.

[0044] For example, Figure 5 and Figure 6 As shown, when an autonomous light-emitting pixel layer 412 is provided between each two adjacent sub-pixels in the original pixel unit, the sandwiched autonomous light-emitting pixel layer 412 can be a new sub-pixel that emits the same color light source as one of the adjacent atomic pixels, that is, forming Figure 5 The new pixel unit A overlaps with the original pixel unit, but the new pixel unit A obviously contains more sub-pixels, where the sub-pixels include atomic pixels and new sub-pixels, that is, the brightness of the new sub-pixels is stronger, thereby improving the display effect by improving the brightness of a single pixel unit; or, the sandwiched autonomous light-emitting pixel layer 412 can be a new sub-pixel that emits light of different colors from the two adjacent atomic pixels, that is, forming Figure 6 The new pixel unit A at least partially overlaps with the original pixel unit. Obviously, this arrangement can obtain a larger number of pixel units, thereby improving the resolution by increasing the number of pixel units.

[0045] For example, Figure 7 As shown, each atomic pixel of the original pixel unit is arranged in multiple rows and columns, and a gap is left between two adjacent sub-pixels. The autonomous light-emitting pixel layer 412 can be arranged as follows Figure 5 and Figure 6 Between the two atomic pixels in each horizontal row, the autonomous light-emitting pixel layer 412 can also be arranged as shown in FIG. Figure 7 In the gaps between each vertical column shown, a new pixel unit A can be formed between the two atomic pixels in the previous horizontal row and the new sub-pixels in the gaps between the adjacent horizontal rows. That is, this arrangement of sub-pixels can obtain a larger number of pixel units, thereby improving the resolution by increasing the number of pixel units.

[0046] It should be noted that each newly formed pixel unit A includes three sub-pixels, each of which emits one of the colors red, green, and blue. Figure 5-Figure 7 , where R represents red, G represents green, B represents blue, R' represents red, G' represents green, and B' represents blue, where R, G, and B represent atomic pixels respectively, where R', G'B' represent new sub-pixels respectively, and the new sub-pixels are composed of their respective main light-emitting pixel layers 412 and their corresponding display areas 3.

[0047] Considering the light energy excitation color display conditions of each main light-emitting pixel layer 412, the display panel 100 of the embodiment of the present application further includes a light-transmitting component 5, which includes a structured incident lens 51, a one-way high-transmittance film group 52 and an upper polarizer 53. For example, the upper polarizer 53 is used to cooperate with the lower polarizer 32 described later to perform polarization; the upper polarizer 53 is covered on the side of the first substrate 1 away from the second substrate 2, the one-way high-transmittance film group 52 is covered on the side of the upper polarizer 53 away from the first substrate 1, and the one-way high-transmittance film group 52 includes a first one-way high-transmittance film 521 and an array embedded with the first one-way high-transmittance film Multiple second one-way high-transmittance films 522 in 521; multiple structural incident lenses 51 are arranged, each structural incident lens 51 is covered on the side of the one-way high-transmittance film group 52 away from the upper polarizer 53, and each structural incident lens 51 is arranged at intervals, each structural incident lens 51 is respectively arranged opposite to an autonomous light-emitting pixel layer 412, every two second one-way high-transmittance films 522 and the first one-way high-transmittance film 521 sandwiched therebetween are correspondingly arranged between each structural incident lens 51 and each autonomous light-emitting pixel layer 412, and the first one-way high-transmittance film 521 is used to block ambient light from being transmitted to the liquid crystal layer 31.

[0048] In this embodiment, ambient light passes through each structural incident lens 51, each second one-way high-transmittance film 522, and the liquid crystal layer 31 in sequence and is transmitted to each autonomous light-emitting pixel layer 412, so as to enable each autonomous light-emitting pixel layer 412 to display one of the colors of red, green, and blue under the excitation of the outdoor light energy of the ambient light. In this way, the autonomous light-emitting pixel layer 412 can achieve the combined effect of the color filter layer 36 and the micro-light-emitting diode lamp bead 411 under the excitation condition of outdoor light energy. It should be pointed out that the use of the light-transmitting component 5 of the present application can enable the outdoor light energy to be transmitted to the autonomous light-emitting pixel layer 412 through the second one-way high-transmittance film 522, and the autonomous light-emitting pixel layer 412 after luminescence and color display combined with the image of the liquid crystal layer 31 is transmitted to the user's field of view through the first one-way high-transmittance film 521. It should be further pointed out that the light transmission directions of the first unidirectional high-transmittance film 521 and the second unidirectional high-transmittance film 522 are set in opposite directions, so that the first unidirectional high-transmittance film 521 can transmit the colored and bright image in the display panel 100 to the user's field of view or outdoors, and the second unidirectional high-transmittance film 522 can transmit the outdoor ambient light to the autonomous light-emitting pixel layer 412, thereby achieving the effect of forming a new pixel unit A.

[0049] Considering that at least a portion of the area in the structural incident lens 51 is used to transmit outdoor ambient light to the autonomous luminous pixel layer 412, the remaining area in the incident lens is used to transmit the image and color of the new display area 3 formed by the new pixel unit A and the original pixel unit to the user's field of view or the outdoor environment, in the display panel 100 provided in the embodiment of the present application, the structural incident lens 51 includes a plane area 511 and a bevel area 512 located on both sides of the plane area 511, and each side bevel area 512 is arranged opposite to a second one-way high-transmittance film 522, so as to allow the ambient light to be transmitted to each autonomous luminous pixel layer 412 through the bevel area 512, the second one-way high-transmittance film 522, and the liquid crystal layer 31 in sequence.

[0050] For example, the inclined surface area 512 may be formed in the plane area 511 and tilted toward the side away from the display panel 100; or Figure 1 and Figure 2 As shown, the bevel region 512 may also be formed in the plane region 511 and tilted toward the side close to the display panel 100. It should be noted that the bevel region 512 occupies a smaller area of ​​the structural incident lens 51, while the plane region 511 occupies a larger area of ​​the structural incident lens 51.

[0051] In this way, the bevel region 512 and the second one-way high-transmittance film 522 are positioned relative to each other, and combined with the light transmission direction of the second one-way high-transmittance film 522, outdoor ambient light can be refracted through the bevel region 512 to the second one-way high-transmittance film 522, and then transmitted through the display area 3 to the corresponding autonomous light-emitting pixel layer 412. Furthermore, because the bevel region 512 occupies a smaller area of ​​the structural input lens 51, while the flat region 511 occupies a larger area of ​​the structural input lens 51, the area of ​​black dots or black lines formed when displaying an image is small, thereby not affecting the display effect.

[0052] Considering the specific installation scheme of each micro-LED lamp bead 411 and each main light-emitting pixel layer 412, in the display panel 100 provided in the present application, the backlight module 4 also includes a backlight substrate 42 and a first transparent resin layer 43 and a second transparent resin layer 44 stacked on the side of the backlight substrate 42 facing the second substrate 2. Exemplarily, the two transparent resin layers can be used as transparent resin encapsulation layers to play a protective and flattening role; each micro-LED lamp bead 411 is installed on the backlight substrate 42 and embedded between the first transparent resin layer 43 and the second transparent resin layer 44, and each main light-emitting pixel layer 412 is embedded in the second transparent resin layer 44. The heat energy generated by each micro-LED lamp bead 411 is transferred to each independent light-emitting pixel layer 412 through the first transparent resin layer 43 and / or the second transparent resin layer 44.

[0053] Combine Figure 1As shown, the first transparent resin layer 43 is located below the second transparent resin layer 44, and the micro-light emitting diode lamp beads 411 are installed on the backlight substrate 42. For example, the backlight substrate 42 is used to support the circuit substrate of the backlight micro-light emitting diode lamp beads 411, and is in contact with the first transparent resin layer 43 and the second transparent resin layer 44 at the same time. Although the autonomous light-emitting pixel layer 412 is embedded in the second transparent resin layer 44, it is also in contact with the first transparent resin layer 43. In this way, the heat energy generated by the light emission of the micro-light emitting diode lamp beads 411 can be transferred to the autonomous light-emitting pixel layer 412 through the first transparent resin layer 43 and the second transparent resin layer 44, and the autonomous light-emitting pixel layer 412 emits light and displays color under the excitation of the heat energy.

[0054] Further considering that the autonomous light-emitting pixel layer 412 can obtain the excitation of the heat energy generated by the light emission of the micro-light-emitting diode lamp beads 411, in the display panel 100 provided in the embodiment of the present application, at least part of the structure of the autonomous light-emitting pixel layer 412 is in contact with the first transparent resin layer 43.

[0055] That is, further reference Figure 1 In the cross-sectional structure of the display panel 100, regardless of whether the autonomous light-emitting pixel layer 412 is arranged in the horizontal spacing gaps between the atomic pixels or the autonomous light-emitting pixel layer 412 is arranged in the vertical spacing gaps between the atomic pixels, as long as at least part of the structure of each autonomous light-emitting pixel layer 412 is in contact with the first transparent resin layer 43, the heat energy generated by the light emission of the micro-light-emitting diode lamp beads 411 can stimulate the autonomous light-emitting pixel layer 412 to emit light and display color.

[0056] Considering that the micro-light-emitting diode lamp bead 411 needs to emit the light source inside the display panel 100 from the inside to the outside to the outdoors, that is, the light energy of the atomic pixel can only be emitted from the inside to the outside, but not from the outside to the inside, in the display panel 100 provided in the present application, the display area 3 also includes a lower polarizer 32. For example, the lower polarizer 32 plays the role of LCD polarization; the lower polarizer 32 is covered on the side of the second substrate 2 away from the first substrate 1, and the backlight module 4 also includes a first film 45 and a second film 46. The first film 45 is covered on the side of the lower polarizer 32 away from the second substrate 2, and the second film 46 is covered on the side of the first film 45 away from the lower polarizer 32; the first film 45 includes a plurality of prism brightening areas 451 arranged in an array and spaced apart, and the second film 46 includes a plurality of diffusion areas 461 arranged in an array and spaced apart.

[0057] Exemplarily, both the first film layer and the second film layer are transparent film layers.

[0058] Exemplarily, the diffusion area 461 can be understood as a diffusion film, which plays the role of uniform light.

[0059] Exemplarily, the prism brightening area 451 can be understood as a prism brightening film, which plays a role in improving brightness.

[0060] Among them, each prism brightening area 451 and each diffusion area 461 are respectively arranged opposite to a micro-LED lamp bead 411 and at least a part of the first one-way high-transmittance film 521. Each prism brightening area 451 and each diffusion area 461 are respectively used to transmit the light source of the micro-LED lamp bead 411 to the liquid crystal layer 31, and make the display image of the liquid crystal layer 31 enter the user's field of view through the first one-way high-transmittance film 521.

[0061] It should be noted that the prism brightening area 451 only has a one-way light transmission function, that is, the prism incremental area can transmit the light source of the micro-LED lamp bead 411 through the liquid crystal layer 31 and the first one-way high-transmittance film 521 to the user's field of view or outdoors.

[0062] Considering that the autonomous light-emitting pixel layer 412 can receive ambient light from the outside and the inside, and can also transmit the image of its own light emission combined with the liquid crystal layer 31 to the outdoors, in the display panel 100 provided in the embodiment of the present application, the first film 45 also includes a plurality of first transparent areas 452 arranged in an array and at intervals, each first transparent area 452 is sandwiched between two adjacent prism brightening areas 451, and the second film 46 also includes a plurality of second transparent areas 462 arranged in an array and at intervals, each second transparent area 462 is sandwiched between two adjacent diffusion areas 461.

[0063] In this embodiment, ambient light is transmitted to each autonomous light-emitting pixel layer 412 through each structural incident lens 51, each second one-way high-transmittance film 522, the display area 3, each first transparent area 452 and each second transparent area 462. At the same time, the luminous color rendering effect formed by the autonomous light-emitting pixel layer 412 can be transmitted to the corresponding liquid crystal layer 31 through the first transparent area 452 and the second transparent area 462, and form a new image of a new pixel unit A with the corresponding liquid crystal layer 31. The new image can be transmitted to the structural incident lens 51 through the first one-way high-transmittance film 521 corresponding to the planar area 511 of the structural incident lens 51 and transmitted to the outdoors or the user's field of view.

[0064] Considering the heat dissipation solution of the backlight module 4 for the heat generated by the micro-light-emitting diode lamp beads 411, in the display panel 100 of the embodiment of the present application, the backlight module 4 also includes a third substrate 47 and a heat-conducting layer 48 covering the side of the third substrate 47 facing the second substrate 2, and the heat-conducting layer 48 is sandwiched between the third substrate 47 and the backlight substrate 42.

[0065] Exemplarily, the third substrate 47 may be a transparent substrate, or the third substrate 47 may be a glass substrate.

[0066] Exemplarily, the heat conductive layer 48 may be a graphene superconducting layer 48 plate.

[0067] Considering the material composition of the autonomous light-emitting pixel layer 412, in the display panel 100 provided in the embodiment of the present application, the autonomous light-emitting pixel layer 412 can be constructed to be composed of Mg2SiO4:RE series thermoluminescent materials and / or RGB different color photoluminescent materials, and the Mg2SiO4:RE is formed by doping rare earth elements (RE) into the Mg2SiO4 characteristics, and the rare earth elements include any one of Ce (cerium), Pr (praseodymium), Nd (neodymium), Sm (samarium), Eu (europium), Tb (terbium), Dy (dysprosium), Er (erbium), Tm (thulium) or Yb (ytterbium).

[0068] Exemplarily, the self-luminous pixel layer 412 may include only Mg2SiO4:RE series thermoluminescent materials, or only RGB different color photoluminescent materials, or may include both Mg2SiO4:RE series thermoluminescent materials and RGB different color photoluminescent materials.

[0069] When the self-luminescent pixel layer 412 includes both thermoluminescent material and photoluminescent material, the thermoluminescent material and the photoluminescent material may be arranged in layers vertically or horizontally.

[0070] When a top-bottom layered arrangement is used, the photoluminescent material is located above the thermoluminescent material.

[0071] For example, Mg2SiO4 is a compound, the Chinese name of which is magnesium silicate. It has a specific crystal structure and chemical properties, and has certain applications in fields such as materials science. It is often used as a matrix material to provide a stable chemical environment for the doping of other elements. The aforementioned Ce (cerium), Pr (praseodymium), Nd (neodymium), Sm (samarium), Eu (europium), Tb (terbium), Dy (dysprosium), Er (erbium), Tm (thulium) or Yb (ytterbium) are all rare earth elements, which have unique electronic structures and optical, magnetic and other properties. Doping these rare earth elements into Mg2SiO4 can change the physical and chemical properties of Mg2SiO4, such as optical properties, luminescence characteristics, etc., so that Mg2SiO4:RE materials have potential application value in many optoelectronic device fields such as light-emitting diodes, phosphors, laser materials, optical sensors, etc.

[0072] For example, when Eu is doped into Mg2SiO4, the material may emit red fluorescence under excitation of a specific wavelength, and can be used as a phosphor material in the field of lighting or display.

[0073] For example, when Tb is doped into Mg2SiO4, the material may emit green fluorescence under excitation of a specific wavelength, and can be used as a phosphor material in the field of lighting or display.

[0074] For example, when Ce is doped into Mg2SiO4, the material may emit blue fluorescence under excitation of a specific wavelength, and can be used as a phosphor material in the field of lighting or display.

[0075] Considering the initial alignment scheme of the liquid crystal molecules in the liquid crystal layer 31, the display area 3 also includes a first PI alignment layer 33 and a second PI alignment layer 34. The first PI alignment layer 33 is covered on the side of the first substrate 1 facing the second substrate 2. The first PI alignment layer 33 is sandwiched between the first substrate 1 and the liquid crystal layer 31. The second PI alignment layer 34 is covered on the side of the liquid crystal layer 31 away from the first PI alignment layer 33. The first PI alignment layer 33 and the second PI alignment layer 34 are respectively used to give the liquid crystal molecules in the liquid crystal layer 31 an initial alignment angle, and the initial alignment angle is used to limit the rotation direction of the liquid crystal molecules under the action of the driving electric field force.

[0076] In this way, the liquid crystal molecules can rotate in the direction of the preset initial alignment angle under the deflection effect of the driving electric field, and will not rotate in the direction opposite to the preset initial alignment angle.

[0077] Considering that the liquid crystal molecules in the liquid crystal layer 31 can be affected by the driving electric field, in the display panel 100 provided in the embodiment of the present application, the display area 3 also includes a TFT thin-film transistor 35, which is sandwiched between the second PI alignment layer 34 and the second substrate 2. The TFT thin-film transistor 35 is used to energize the pixel electrode and the common electrode to form a driving electric field for driving the liquid crystal molecules to rotate.

[0078] Exemplarily, the TFT thin film transistor 35 serves as a switch for controlling charging and discharging, and plays a role in controlling the magnitude of the electric field.

[0079] Considering that the white light behind each micro-LED lamp bead 411 can enable each atomic pixel to emit light of one of the three primary colors under the action of the color filter layer 36, in the display panel 100 provided in the embodiment of the present application, the display area 3 also includes multiple color filter layers 36, each color filter layer 36 is embedded in the first PI alignment layer 33 and in contact with the first substrate 1, and each color filter layer 36 is arranged opposite to each micro-LED lamp bead 411. The white light irradiated by each micro-LED lamp bead 411 passes through each color filter layer 36 and is emitted in one color of red, green and blue to the first unidirectional high-transmittance film 521 and into the user's line of sight.

[0080] Taking into account the overall structural stability of the display panel 100, in the display panel 100 provided in the embodiment of the present application, the backlight module 4 also includes a packaging frame 49, which wraps the first substrate 1, the second substrate 2, the display area 3 located between the first substrate 1 and the second substrate 2, and the outer periphery of the backlight module 4 located on the side of the second substrate 2 away from the first substrate 1, and is used to assemble the first substrate 1, the second substrate 2, the display area 3 and the backlight module 4 into one.

[0081] In summary, the display panel 100 provided in the embodiment of the present application can add an autonomous light-emitting pixel layer 412 on the basis of the original micro-light-emitting diode backlight module 4, and the autonomous light-emitting pixel layer 412 can independently emit light and display colors under the stimulation of outdoor ambient light and / or the heat energy generated by the light emission of the micro-light-emitting diode lamp beads 411, and can form a new pixel unit A between the adjacent atomic pixels, thereby enhancing the display effect of the display panel 100.

[0082] Specifically, it is a design that mainly utilizes the characteristics of the mini ed backlight display structure to increase the number of pixels on the basis of reducing the display backlight micro-LED lamp beads 411 without separately designing other backlight power-consuming devices. The autonomous luminous pixel layer 412 uses photoluminescent and / or thermoluminescent composite luminescent materials, which display different RGB colors after being excited by the external light and the temperature generated by the micro-LED lamp beads 411, thus serving as an autonomous luminous pixel unit. The design of the autonomous luminescent material in the backlight module 4 can be arbitrarily arranged in combination with the product parameter requirements and pixel arrangement, refer to Figure 5-Figure 7 The material of the autonomous light-emitting pixel layer 412 can be simultaneously excited by both thermal energy and light energy.

[0083] A new outdoor micro-LED display screen that can reduce power consumption and achieve high resolution is adopted in the embodiment of the present application, and a special film layer of light and heat energy storage material is designed. The outdoor light energy and the thermal energy of the micro-LEDs are used for excitation to increase the number of display pixels, thereby improving the display resolution. A special outdoor display structure is provided.

[0084] The embodiment of the present application further provides a display device, including the aforementioned display panel 100 , which can achieve all the effects of the display panel 100 and will not be described in detail here.

[0085] It should be understood that the terms used herein are for the purpose of describing specific example embodiments only and are not intended to be limiting. Unless the context clearly indicates otherwise, the singular forms "one", "an" and "said" as used herein may also be meant to include plural forms. The terms "comprise", "include", "contain" and "have" are inclusive and therefore specify the presence of stated features, steps, operations, elements and / or parts, but do not exclude the presence or addition of one or more other features, steps, operations, elements, parts, and / or combinations thereof. The method steps, processes, and operations described herein are not to be construed as necessarily requiring them to be performed in the specific order described or illustrated, unless the order of execution is clearly indicated. It should also be understood that additional or alternative steps may be used.

[0086] Although the terms first, second, third, etc. can be used in the text to describe multiple elements, components, regions, layers and / or sections, these elements, components, regions, layers and / or sections should not be limited by these terms. These terms can only be used to distinguish an element, component, region, layer or section from another region, layer or section. Unless the context clearly indicates otherwise, terms such as "first", "second" and other numerical terms do not imply order or sequence when used in the text. Therefore, the first element, component, region, layer or section discussed below can be referred to as the second element, component, region, layer or section without departing from the teaching of the example embodiments.

[0087] The foregoing description is intended only to provide specific embodiments of the present invention, which will enable those skilled in the art to understand and implement the present invention. Various modifications to these embodiments will be readily 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 invention. Therefore, the present invention is not intended to be limited to the embodiments shown herein, but is intended to be accorded the widest scope consistent with the principles and novel features claimed herein.

Claims

1. A display panel, comprising: A first substrate (1), a second substrate (2), a display area (3) located between the first substrate (1) and the second substrate (2), and a backlight module (4) located on a side of the second substrate (2) away from the first substrate (1), characterized in that: The display area (3) includes a liquid crystal layer (31); The backlight module (4) comprises a light source layer (41), wherein the light source layer (41) comprises a plurality of micro-light emitting diode lamp beads (411) arranged in multiple rows and columns at intervals, and an autonomous light-emitting pixel layer (412) sandwiched between each two adjacent micro-light emitting diode lamp beads (411); The autonomous light-emitting pixel layer (412) is constructed as a thermoluminescent structure and a photoluminescent structure, and each autonomous light-emitting pixel layer (412) is configured to display one of red, green, and blue colors under the combined stimulation of outdoor light energy and heat energy generated by the light-emitting diode lamp beads (411); or The autonomous light-emitting pixel layer (412) is constructed as a photoluminescent structure, and each autonomous light-emitting pixel layer (412) is configured to display one of red, green, and blue colors under the stimulation of outdoor light energy; A new pixel unit (A) is formed between each of one, two or three of the autonomous light-emitting pixel layers (412) and the sub-pixels where the adjacent micro-light-emitting diode lamp beads (411) are located; The new pixel unit (A) is arranged to overlap or coincide with the original pixel unit; The display panel (100) further comprises a light-transmitting component (5), the light-transmitting component (5) comprising a structured incident lens (51) and a one-way high-transmittance film group (52), the structured incident lens (51) being covered on the side where the first substrate (1) is located, the one-way high-transmittance film group (52) comprising a first one-way high-transmittance film (521) and a plurality of second one-way high-transmittance films (522) arrayed and embedded in the first one-way high-transmittance film (521); each of the structured incident lenses (51) is arranged at intervals, each of the structured incident lenses (51) is respectively arranged opposite to one of the autonomous light-emitting pixel layers (412), and each two of the second one-way high-transmittance films (522) and the first one-way high-transmittance film (521) sandwiched therebetween are correspondingly arranged between each of the structured incident lenses (51) and each of the autonomous light-emitting pixel layers (412), and the first one-way high-transmittance film (521) is used to block ambient light from being transmitted to the liquid crystal layer (31); Ambient light sequentially passes through each of the structural incident lenses (51), each of the second one-way high-transmittance films (522), and the liquid crystal layer (31), and is transmitted to each of the autonomous light-emitting pixel layers (412), so that each of the autonomous light-emitting pixel layers (412) displays one of the colors red, green, and blue under the stimulation of outdoor light energy of the ambient light.

2. The display panel according to claim 1, wherein: The light-transmitting component (5) comprises an upper polarizer (53), the upper polarizer (53) being covered on a side of the first substrate (1) away from the second substrate (2), the one-way high-transmittance film group (52) being covered on a side of the upper polarizer (53) away from the first substrate (1), and a plurality of structural incident lenses (51) being provided, each of the structural incident lenses (51) being covered on a side of the one-way high-transmittance film group (52) away from the upper polarizer (53).

3. The display panel according to claim 2, wherein: The structured incident lens (51) comprises a plane region (511) and bevel regions (512) located on both sides of the plane region (511), wherein the bevel regions (512) on each side are arranged opposite to a second one-way high-transmittance film (522), and are used to allow the ambient light to be transmitted sequentially through the bevel regions (512), the second one-way high-transmittance film (522), and the liquid crystal layer (31) to each of the autonomous light-emitting pixel layers (412).

4. The display panel according to claim 2, wherein: The backlight module (4) further comprises a backlight substrate (42) and a first transparent resin layer (43) and a second transparent resin layer (44) stacked on the side of the backlight substrate (42) facing the second substrate (2); Each of the micro-light emitting diode lamp beads (411) is mounted on the backlight substrate (42) and embedded between the first transparent resin layer (43) and the second transparent resin layer (44); each of the autonomous light emitting pixel layers (412) is embedded in the second transparent resin layer (44); and heat energy generated by each of the micro-light emitting diode lamp beads (411) is transferred to each of the autonomous light emitting pixel layers (412) through the first transparent resin layer (43) and / or the second transparent resin layer (44); At least a portion of the structure of the autonomous light-emitting pixel layer (412) is in contact with the first transparent resin layer (43).

5. The display panel according to claim 4, wherein: The display area (3) further comprises a lower polarizer (32), the lower polarizer (32) being covered on a side of the second substrate (2) away from the first substrate (1), and the backlight module (4) further comprises a first film (45) and a second film (46), the first film (45) being covered on a side of the lower polarizer (32) away from the second substrate (2), and the second film (46) being covered on a side of the first film (45) away from the lower polarizer (32); The first film (45) includes a plurality of prism brightness enhancement areas (451) arranged in an array and spaced apart, and the second film (46) includes a plurality of diffusion areas (461) arranged in an array and spaced apart; Each of the prism brightening regions (451) and each of the diffusion regions (461) are respectively arranged opposite to one of the micro-LED lamp beads (411) and at least a portion of the first one-way high-transmittance film (521). Each of the prism brightening regions (451) and each of the diffusion regions (461) are respectively used to transmit the light source of the micro-LED lamp bead (411) to the liquid crystal layer (31), and to allow the display image of the liquid crystal layer (31) to be projected into the user's field of view via the first one-way high-transmittance film (521).

6. The display panel according to claim 5, wherein: The first film (45) further includes a plurality of first transparent areas (452) arranged in an array and spaced apart, each of the first transparent areas (452) being sandwiched between two adjacent prism brightening areas (451); the second film (46) further includes a plurality of second transparent areas (462) arranged in an array and spaced apart, each of the second transparent areas (462) being sandwiched between two adjacent diffusion areas (461); The ambient light is transmitted to each of the autonomous light-emitting pixel layers (412) via each of the structural incident lenses (51), each of the second one-way high-transmittance films (522), the display area (3), each of the first transparent areas (452) and each of the second transparent areas (462).

7. The display panel according to claim 4, wherein: The backlight module (4) further comprises a third substrate (47) and a heat-conducting layer (48) covering the side of the third substrate (47) facing the second substrate (2), wherein the heat-conducting layer (48) is sandwiched between the third substrate (47) and the backlight substrate (42); The display area (3) further comprises a plurality of color filter layers (36), each of the color filter layers (36) being embedded in the first PI alignment layer (33) and in contact with the first substrate (1), each of the color filter layers (36) being arranged opposite to each of the micro-light emitting diode lamp beads (411), and the white light irradiated by each of the micro-light emitting diode lamp beads (411) passing through each of the color filter layers (36) and being emitted in one of red, green and blue colors to the first unidirectional high-transmittance film (521), and then emitted into the user's sight.

8. The display panel according to claim 1, wherein: The autonomous luminescent pixel layer (412) is constructed to be composed of Mg2SiO4:RE series thermoluminescent materials and / or RGB different color photoluminescent materials, wherein the Mg2SiO4:RE is formed by doping rare earth elements into the Mg2SiO4 characteristics, and the rare earth elements include any one of Ce, Pr, Nd, Sm, Eu, Tb, Dy, Er, Tm or Yb.

9. The display panel according to claim 1, wherein: The backlight module (4) further comprises a packaging outer frame (49), wherein the packaging outer frame (49) wraps around the first substrate (1), the second substrate (2), the display area (3) located between the first substrate (1) and the second substrate (2), and the periphery of the backlight module (4) located on the side of the second substrate (2) away from the first substrate (1), and is used to assemble the first substrate (1), the second substrate (2), the display area (3) and the backlight module (4) into one body.

10. A display device, characterized in that: The display device comprises a display panel (100) according to any one of claims 1 to 9.

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