Display panel and display device

Abstract

The present invention provides a display panel and a display device, wherein the display panel comprises a substrate, a reflective layer, a first light emitting unit distributed in an array, and a second light emitting unit distributed in an array, wherein the first light emitting unit and the second light emitting unit are arranged on the same side of the substrate and are arranged alternately and spaced apart, and the first light emitting direction of the first light emitting unit and the second light emitting direction of the second light emitting unit are opposite; and the reflective layer is arranged between the first light emitting unit and the second light emitting unit. By arranging the reflective layer between the first light emitting unit and the second light emitting unit, the scattered light emitted by the first light emitting unit toward the direction of the second light emitting unit will be reflected back by the reflective layer, and the scattered light emitted by the second light emitting unit toward the direction of the first light emitting unit will also be reflected back by the reflective layer, thereby avoiding mutual interference between the light emitted by the first light emitting unit and the second light emitting unit, and improving the display effect of the display panel.

Description

Technical Field

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

[0002] With the rapid development of display technology, liquid crystal display, light-emitting diode display and other display technologies have expanded their application modes, such as transparent display, reflective display, etc. Among them, double-sided display is an application mode that can effectively save the space occupancy rate of the display screen and is used in many scenarios. The rapid development of liquid crystal display has accelerated the expansion of this application mode. However, in the related technology, the double-sided display panel has the defect of poor display effect.

[0003] In view of this, it is necessary to provide a new display panel and a display device to solve or at least alleviate the above technical defects. Summary of the invention

[0004] The main purpose of the present invention is to provide a display panel and a display device, aiming to solve the technical problem of poor display effect of double-sided display panels in the prior art.

[0005] To achieve the above object, according to one aspect of the present invention, the present invention provides a display panel, including: a substrate;

[0006] A first light emitting unit distributed in an array and a second light emitting unit distributed in an array, wherein the first light emitting unit and the second light emitting unit are arranged on the same side of the substrate and are alternately distributed, and a first light emitting direction of the first light emitting unit is opposite to a second light emitting direction of the second light emitting unit;

[0007] A reflective layer is disposed between the first light-emitting unit and the second light-emitting unit.

[0008] In some embodiments, let the width in the middle of the reflective layer be L2, the width at the top of the reflective layer be L1, and the width at the bottom of the reflective layer be L3, then L2>L1, and L2>L3; and the cross-sectional width of the reflective layer gradually decreases from the middle to the top and the bottom, respectively.

[0009] In some embodiments, the substrate includes a driving circuit layer, and an insulating layer is disposed between the reflective layer and the driving circuit layer.

[0010] In some embodiments, the display panel also includes an encapsulation layer, a first groove is arranged on the encapsulation layer, a second groove is arranged on the driving circuit layer, the insulating layer is arranged in the second groove, a third groove is formed on the insulating layer, one end of the reflective layer is arranged in the first groove, and the other end of the reflective layer is arranged in the third groove.

[0011] In some embodiments, the display panel further includes a reflective layer, the encapsulation layer forms a recessed groove at a position corresponding to the first light-emitting unit, the reflective layer is arranged in the recessed groove, and the length of the reflective layer is greater than or equal to the distance between two adjacent reflective layers.

[0012] In some embodiments, a transparent conductive layer is further disposed on the encapsulation layer, the conductive layer is alternately connected to the reflective layer, and the transparent conductive layer is electrically connected to the cathode of the first light-emitting unit and the cathode of the second light-emitting unit.

[0013] In some embodiments, the first light-emitting unit includes a first light-emitting chip, a second light-emitting chip, and a third light-emitting chip arranged in sequence, the second light-emitting unit includes a fourth light-emitting chip, a fifth light-emitting chip, and a sixth light-emitting chip arranged in sequence, the first light-emitting chip is arranged close to the sixth light-emitting chip of an adjacent second light-emitting unit, the third light-emitting chip is arranged close to the fourth light-emitting chip of another adjacent second light-emitting unit, the first light-emitting chip and the sixth light-emitting chip emit light of the same color, and the third light-emitting chip and the fourth light-emitting chip emit light of the same color.

[0014] In some embodiments, the display panel further includes a first black matrix layer and a second black matrix layer, the first black matrix layer is disposed on the first light emitting direction side of the first light emitting unit, and the orthographic projection of the first black matrix layer on the substrate covers the orthographic projection of the second light emitting unit on the substrate;

[0015] The second black matrix layer is disposed on the second light emitting direction side of the second light emitting unit, and the orthographic projection of the second black matrix layer on the substrate covers the orthographic projections of the first light emitting unit and the reflective layer on the substrate.

[0016] According to another aspect of the present invention, the present invention further provides a method for manufacturing a display panel, the method for manufacturing a display panel comprising:

[0017] providing a substrate;

[0018] Disposing a reflective layer on the substrate;

[0019] An array of first light-emitting units and an array of second light-emitting units are arranged on the same side of the substrate; wherein the first light-emitting direction of the first light-emitting unit is opposite to the second light-emitting direction of the second light-emitting unit; and the reflective layer is located between the first light-emitting unit and the second light-emitting unit.

[0020] In some embodiments, the step of providing a substrate includes:

[0021] Providing a base plate, on which a first black matrix layer is disposed;

[0022] A driving circuit layer is arranged on the first black matrix layer to form the substrate; wherein the driving circuit layer is formed with a second groove;

[0023] The step of providing a reflective layer on the substrate comprises:

[0024] An insulating layer is arranged in the second groove of the driving circuit layer, the insulating layer is formed with a third groove, and the bottom of the reflective layer is arranged in the third groove;

[0025] After the step of arranging the first light emitting units and the second light emitting units distributed in an array on the same side of the substrate, the step further includes:

[0026] The encapsulation layer is installed; wherein a first groove and a reflective layer are arranged on the encapsulation layer, the top of the reflective layer is installed in the first groove, and the reflective layer is arranged corresponding to the first light-emitting unit.

[0027] In the above scheme, the display panel includes a substrate, a reflective layer, a first light emitting unit distributed in an array, and a second light emitting unit distributed in an array. The first light emitting unit and the second light emitting unit are arranged on the same side of the substrate and are alternately spaced. The first light emitting direction of the first light emitting unit and the second light emitting direction of the second light emitting unit are opposite; the reflective layer is arranged between the first light emitting unit and the second light emitting unit. The first light emitting unit and the second light emitting unit are arranged on the same side of the substrate, which can reduce the space occupied and is conducive to realizing the lightness and thinness of the display panel. At the same time, the first light emitting direction of the first light emitting unit and the second light emitting direction of the second light emitting unit are opposite, which can realize the double-sided display of the display panel. In the above scheme of the present invention, by arranging the reflective layer between the first light emitting unit and the second light emitting unit, it is equivalent to setting up a barrier between the first light emitting unit and the second light emitting unit. The scattered light emitted by the first light emitting unit toward the direction of the second light emitting unit will be reflected back by the reflective layer, and the scattered light emitted by the second light emitting unit toward the direction of the first light emitting unit will also be reflected back by the reflective layer. In this way, the mutual interference of the light emitted by the first light emitting unit and the second light emitting unit can be avoided, and the display effect of the display panel can be improved. In addition, since the reflective layer can reflect back the scattered light of the first light-emitting unit and the second light-emitting unit, the utilization rate of light energy can be improved, further improving the display effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying any creative work.

[0029] Figure 1 It is a structural schematic diagram of a display panel according to an embodiment of the present invention;

[0030] Figure 2 It is a schematic structural diagram of a reflective layer of a display panel according to an embodiment of the present invention;

[0031] Figure 3 A schematic diagram of light reflected by a reflective layer of a display panel according to an embodiment of the present invention;

[0032] Figure 4 It is a structural schematic diagram of a display panel according to another embodiment of the present invention;

[0033] Figure 5 For the present invention Figure 4 A structural schematic diagram of the arrangement of the first light-emitting unit and the second light-emitting unit;

[0034] Figure 6 It is a structural schematic diagram of a display panel according to another embodiment of the present invention;

[0035] Figure 7 This is a structural schematic diagram of a display panel provided with a first groove and a third groove according to another embodiment of the present invention;

[0036] Figure 8 This is a schematic structural diagram of a display panel provided with a reflective layer according to another embodiment of the present invention;

[0037] Fig. 9 This is a schematic structural diagram of a display panel provided with a reflective layer and a transparent conductive layer according to another embodiment of the present invention;

[0038] Fig.10 A schematic diagram of a part of the process of manufacturing a display panel according to the first embodiment of the present invention;

[0039] Fig.11 A schematic diagram of a part of the process of manufacturing a display panel according to the first embodiment of the present invention;

[0040] Fig.12 It is a structural schematic diagram of a display panel according to another embodiment of the present invention;

[0041] Fig.13 is a schematic flow chart of a method for manufacturing a display panel according to a first embodiment of the present invention;

[0042] Fig.14 is a schematic flow chart of a method for manufacturing a display panel according to a second embodiment of the present invention;

[0043] Description of Figure Numbers:

[0044] 10. Base plate; 20. First light-emitting unit; 21. First light-emitting chip; 22. Second light-emitting chip; 23. Third light-emitting chip; 30. Second light-emitting unit; 31. Fourth light-emitting chip; 32. Fifth light-emitting chip; 33. Sixth light-emitting chip; 40. Reflective layer; 41. Middle; 42. Top; 43. Bottom; 50. Driving circuit layer; 60. First black matrix layer; 70. Second black matrix layer; 80. Encapsulation layer; 90. Insulation layer; 100. Reflective layer; 110. Transparent conductive layer.

[0045] 1. Black matrix material; 2. Metal material; 3. Hot melt adhesive; 4. Groove; 5. Reflective material.

[0046] The realization of the purpose, functional features and advantages of the present invention will be further explained in conjunction with the implementation methods and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0047] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0048] It should be noted that all directional indications (such as up, down, etc.) in the embodiments of the present invention are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0049] In addition, in the present invention, the descriptions such as "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" or "second" may explicitly or implicitly include at least one of the features.

[0050] Furthermore, the technical solutions between the various embodiments of the present invention may be combined with each other, but this must be based on the fact that they can be implemented by ordinary technicians in the field. When the combination of technical solutions is mutually contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0051] In the related art, a double-sided display panel includes a first light-emitting unit and a second light-emitting unit, wherein the first light-emitting unit and the second light-emitting unit may include LED lamps. In order to meet users' increasingly strong demand for ultra-thin display panels, in the related art, there is a technical solution of arranging the first light-emitting unit and the second light-emitting unit on the same side of the substrate. The applicant found that although this solution further reduced the thickness of the display panel, the display effect was not good. After careful research, the applicant found that since the first light-emitting unit and the second light-emitting unit are generally composed of a plurality of light-emitting chips, the light emitted by the two adjacent light-emitting chips of the first light-emitting unit and the second light-emitting unit interferes with each other, which is the main reason for the poor display.

[0052] To this end, the present application provides a display panel and a display device.

[0053] Reference Figure 1 According to one aspect of the present invention, a display panel is provided, comprising a substrate, a reflective layer 40, an array-distributed first light-emitting unit 20, and an array-distributed second light-emitting unit 30, wherein the first light-emitting unit 20 and the second light-emitting unit 30 are arranged on the same side of the substrate and are alternately arranged, and a first light-emitting direction of the first light-emitting unit 20 and a second light-emitting direction of the second light-emitting unit 30 are opposite; the reflective layer 40 is arranged between the first light-emitting unit 20 and the second light-emitting unit 30.

[0054] Among them, the first light emission direction is as follows Figure 1 As shown in Z1, the second light emission direction is Figure 1 As shown in Z2. The first light-emitting unit 20 and the second light-emitting unit 30 are arranged on the same side of the substrate, which can reduce the space occupied and is conducive to realizing the thinness of the display panel. At the same time, the first light-emitting direction of the first light-emitting unit 20 and the second light-emitting direction of the second light-emitting unit 30 are opposite, which can realize the double-sided display of the display panel. In the above embodiment of the present invention, by arranging the reflective layer 40 between the first light-emitting unit 20 and the second light-emitting unit 30, it is equivalent to setting up a barrier between the first light-emitting unit 20 and the second light-emitting unit 30. The scattered light emitted by the first light-emitting unit 20 toward the direction of the second light-emitting unit 30 will be reflected back by the reflective layer 40, and the scattered light emitted by the second light-emitting unit 30 toward the direction of the first light-emitting unit 20 will also be reflected back by the reflective layer 40. In this way, the mutual interference of the light emitted by the adjacent first light-emitting unit 20 and the second light-emitting unit 30 can be avoided, and the display effect of the display panel can be improved. In addition, since the reflective layer 40 can reflect the scattered light of the first light-emitting unit 20 and the second light-emitting unit 30 back, the utilization rate of light energy can also be improved, and the display effect can be further improved.

[0055] Reference Figure 2 and Figure 3In some embodiments, let the width of the middle 41 of the reflective layer 40 be L2, the width of the top 42 of the reflective layer 40 be L1, and the width of the bottom 43 of the reflective layer 40 be L3, then L2>L1, and L2>L3. The cross section here refers to the cross section perpendicular to the first light emitting direction or the second light emitting direction. Because the first light emitting direction and the second light emitting direction are opposite, the cross section is perpendicular to both the first light emitting direction and the second light emitting direction. The width L2 of the middle part of the reflective layer 40 is at least greater than the width L1 of the top 42 and the width L3 of the bottom 43, and the distance H1 from the widest position of the middle part to the top 42 is equal to the distance H2 from the bottom 43; L1 and L3 are set to at least 1um, and L2 is at least 1um larger than L1 and L3. Here, the width of the middle 41 is set larger, and the widths of the top 42 and the bottom 43 are designed to be smaller, or it can be said that the cross-sectional area of ​​the middle 41 is larger, and the cross-sectional areas of the two ends are designed to be smaller, in order to form an inclined slope, which is conducive to the light emitted from the first light-emitting unit 20 to be reflected back after being reflected by the reflective layer 40. For example, referring to Figure 3 , the light A emitted from the upper edge of the first light-emitting unit 20 is reflected by the reflective layer to the light outlet or the light-emitting chip itself, and the light B emitted from the lower edge of the first light-emitting unit 20 is reflected by the reflective layer to the first black matrix layer 60 or the light-emitting chip itself. Similarly, the light C emitted from the upper edge of the second light-emitting unit 30 is reflected by the reflective layer to the second black matrix layer 70 or the light-emitting chip itself, and the light D emitted from the lower edge of the second light-emitting unit 30 is reflected by the reflective layer to the light outlet or the light-emitting chip itself. Among them, the light outlet has a spacing forming layer of the first black matrix layer 60 or the second black matrix layer 70. This can not only effectively prevent interference from adjacent light, but also further improve the utilization rate of light energy and enhance the display effect.

[0056] Reference Figure 2 and Figure 3 In some specific embodiments, the cross-sectional width of the reflective layer 40 gradually decreases from the middle 41 to the top 42 and the bottom 43. Thus, from the cross-sectional view, the middle 41 of the reflective layer 40 is inclined from the top 42 and from the middle 41 of the reflective layer 40 to the bottom 43.

[0057] In some embodiments, the reflective layer 40 includes one or more of copper, aluminum, and silver. The reflective layer 40 can be made of a material with good light reflection performance. Of course, in order to avoid interference caused by light passing through the reflective layer 40, the reflective layer 40 can be made of metal. For example, the reflective layer 40 can be made of copper, aluminum, or silver, or a mixture of two or three of copper, aluminum, and silver.

[0058] Reference Figure 6In some embodiments, the substrate includes a bottom plate 10, a first black matrix layer 60 disposed on the bottom plate 10, and a driving circuit layer 50 disposed on the first black matrix layer 60, and an insulating layer 90 is disposed between the reflective layer 40 and the driving circuit layer 50. The driving circuit layer 50 is disposed between the first light-emitting unit 20 and the substrate, and / or, the driving circuit layer 50 is disposed between the second light-emitting unit 30 and the substrate. The driving circuit layer 50 includes a plurality of pixel driving circuits distributed in an array, and any pixel driving circuit drives at least one first light-emitting unit 20 to emit light, or at least drives one second light-emitting unit 30 to emit light. The driving circuit layer 50 includes a plurality of thin film transistors electrically connected to each other. The thickness of the insulating layer 90 is generally 1um to 2um, which is used to prevent the reflective layer 40 and the driving circuit layer 50 from being turned on to affect signal transmission.

[0059] Reference Figure 7 In some embodiments, the display panel further includes an encapsulation layer 80, a first groove is provided on the encapsulation layer 80, a second groove is provided on the driving circuit layer 50, an insulating layer 90 is provided in the second groove, a third groove is formed on the insulating layer 90, a top 42 of the reflective layer 40 is provided in the first groove, and a bottom 43 of the reflective layer 40 is provided in the third groove. The first groove refers to the encapsulation layer 80 being recessed inwardly, the driving circuit layer 50 is provided with a second groove for accommodating the insulating layer 90, and the insulating layer 90 is recessed inwardly to form the third groove. Here, the height of the reflective layer 40 is set higher, so that the top 42 of the reflective layer 40 is inserted into the first groove, and the bottom 43 is inserted into the third groove, which can further avoid light leakage from the top 42 or the bottom 43 of the reflective layer 40 to cause poor display.

[0060] Reference Figure 8In some embodiments, the display panel further includes a reflective layer 100, and a concave groove is formed at the position of the encapsulation layer 80 corresponding to the first light-emitting unit 20, and the reflective layer 100 is arranged in the concave groove, and the length of the reflective layer 100 is greater than or equal to the distance between two adjacent reflective layers 40. Here, it is assumed that the first light-emitting unit 20 emits light upward. This embodiment prevents the light generated by the first light-emitting unit 20 from propagating from the encapsulation layer 80, so that the first display surface has a poor display effect. Specifically, the height of the reflective layer 100 is at least 1um, and the length is not less than the distance between two adjacent reflective layers 40. The material of the reflective layer 100 can be one or more of copper, silver, and aluminum, or other alloys with low transmittance. That is, the present application is a double-sided display panel, including two structures of top emission and bottom emission. Specifically, bottom emission means that the light can first be emitted to the reflective layer 100 at the top, and then emitted downward. The reflective layer 100 is an opaque layer with strong reflection ability. Top emission means that light can be emitted upward directly through the encapsulation layer 80. The reflective layer 100 can be manufactured together with the portion of the reflective layer 40 embedded in the encapsulation layer 80, which can simplify the process. Compared with the two parts being arranged at intervals, the two parts connected as an integrated structure can also improve the reflective effect.

[0061] Reference Fig. 9 In some embodiments, a transparent conductive layer 110 or a semi-transparent conductive layer is also provided on the encapsulation layer 80, and the conductive layer is alternately connected to the reflective layer 100, and the transparent conductive layer 110 is electrically connected to the cathode of the first light-emitting unit 20 and the cathode of the second light-emitting unit 30. In this embodiment, a transparent conductive layer 110 or a semi-transparent conductive layer is added between adjacent reflective layers 100, and the transparent conductive layer 110 semi-transparent conductive layer is connected to the reflective layer 100 as a whole, and is electrically connected to the cathode of the first light-emitting unit 20 and / or the second light-emitting unit 30. In this way, the cathodes of all reflective units can be electrically connected to form an integral cathode network, so as to realize power supply together and simplify the connection process of the cathode and the peripheral power supply signal. It should be noted that although all cathodes are the same electrical signal, the anode of each light-emitting unit is arranged at intervals, and each light-emitting unit can still be controlled separately. The transparent conductive layer 110 is provided so as not to affect the light output rate of the top emission unit. The material of the transparent conductive layer 110 or the semi-transparent conductive layer can be Ag / Mg alloy or ultra-thin Ag / Mg+IZO. The reflective layer 40 is shaped like a double trapezoidal reflective column and is electrically connected to the reflective layer 100 and the transparent (or translucent) conductive layer, which is equivalent to increasing the thickness of the cathode network at a local position, which is beneficial to reducing the resistance of the entire cathode network and improving the stability of the cathode signal.

[0062] Reference Figure 1 and Figure 4In some embodiments, the display panel further includes a first black matrix layer 60 and a second black matrix layer 70, where the first black matrix layer 60 refers to the first black matrix layer 60 in the substrate, and the first black matrix layer 60 is arranged on the first light emitting direction side of the first light emitting unit 20, and the orthographic projection of the first black matrix layer 60 on the substrate covers the orthographic projection of the second light emitting unit 30 on the substrate; the first black matrix layer 60 is used to shield the second light emitting unit 30 to prevent light leakage of the second light emitting unit 30 from affecting the first light emitting unit 20.

[0063] The second black matrix layer 70 is disposed on the second light emitting direction side of the second light emitting unit 30, and the orthographic projection of the second black matrix layer 70 on the substrate covers the orthographic projections of the first light emitting unit 20 and the reflective layer 40 on the substrate. Similarly, the second black matrix layer 70 is used to shield the first light emitting unit 20 to prevent light leakage of the first light emitting unit 20 from affecting the second light emitting unit 30.

[0064] Reference Figure 4 and Figure 5 In some embodiments, the first light-emitting unit 20 includes a first light-emitting chip 21, a second light-emitting chip 22, and a third light-emitting chip 23 arranged in sequence, the second light-emitting unit 30 includes a fourth light-emitting chip 31, a fifth light-emitting chip 32, and a sixth light-emitting chip 33 arranged in sequence, the first light-emitting chip 21 is arranged close to the sixth light-emitting chip 33 of an adjacent second light-emitting unit 30, the third light-emitting chip 23 is arranged close to the fourth light-emitting chip 31 of another adjacent second light-emitting unit 30, the first light-emitting chip 21 and the sixth light-emitting chip 33 emit the same color of light, and the third light-emitting chip 23 and the fourth light-emitting chip 31 emit the same color of light. For details, please refer to Figure 5 , Figure 5 The schematic diagram of the arrangement of two second light-emitting units 30 and one first light-emitting unit 20 is shown in FIG. The third light-emitting chip 23 of the first light-emitting unit 20 is arranged adjacent to the fourth light-emitting chip 31 of the second light-emitting unit 30 on the right. At this time, the first light-emitting chip 21 of the first light-emitting unit 20 is arranged adjacent to the sixth light-emitting chip 33 on the left. At this time, the colors of the light emitted by the first light-emitting chip 21 and the sixth light-emitting chip 33 can be set to be the same, and the colors of the light emitted by the third light-emitting chip 23 and the fourth light-emitting chip 31 can be set to be the same. Specifically, for the three primary colors of red, green and blue, the first light-emitting chip 21 and the sixth light-emitting chip 33 can be set to be red light (or red pixels), the third light-emitting chip 23 and the fourth light-emitting chip 31 can be set to be blue light (or blue pixels), and the second light-emitting chip 22 and the fifth light-emitting chip 32 can be set to be green light (or green pixels). In this way, the colors of the light emitted by the adjacent light-emitting chips are the same, which can reduce or eliminate the mutual interference between the light-emitting chips of the first light-emitting unit 20 and the second light-emitting unit 30.

[0065] Reference Figure 6 Specifically, the display panel includes, from bottom to top, a substrate, a first black matrix layer 60, a driving circuit layer 50, a first light emitting unit 20, a second light emitting unit 30 and a reflective layer 40 respectively arranged on the driving circuit layer 50, the bottom of the reflective layer 40 is connected to the driving circuit layer 50 through an insulating layer 90, a packaging layer 80 is arranged on the top of the reflective layer 40, and a second black matrix layer 70 is arranged above the packaging layer 80. Of course, in addition to being arranged at the bottom of the reflective layer 40, the driving circuit layer 50 can also be arranged at the top of the reflective layer 40. In this case, the insulating layer 90 is also arranged between the top of the reflective layer 40 and the driving circuit layer 50 to prevent conduction.

[0066] Reference Fig.13 , Fig.13 FIG. 1 is a flow chart of a method for manufacturing a display panel according to a first embodiment of the present invention. The method for manufacturing a display panel includes:

[0067] S100, providing a substrate;

[0068] The substrate here may include a bottom plate 10 , a first black matrix layer disposed on the bottom plate 10 , and a driving circuit layer disposed on the first black matrix layer.

[0069] S200, providing a reflective layer 40 on the substrate;

[0070] The reflective layer is disposed on the driving circuit layer 50 . The number of the reflective layers 40 is generally multiple, and the multiple reflective layers are disposed at intervals.

[0071] S300, an array of first light-emitting units and an array of second light-emitting units are arranged on the same side of the substrate; wherein a first light-emitting direction of the first light-emitting unit is opposite to a second light-emitting direction of the second light-emitting unit; and a reflective layer is located between the first light-emitting unit and the second light-emitting unit.

[0072] The first light direction is Figure 1 As shown in Z1, the second light emission direction is Figure 1 As shown in Z2. The first light emitting unit 20 and the second light emitting unit 30 are arranged on the same side of the substrate, which can reduce the space occupied and is conducive to realizing the thinness of the display panel. At the same time, the first light emitting direction of the first light emitting unit 20 and the second light emitting direction of the second light emitting unit 30 are opposite, which can realize the double-sided display of the display panel. Fig.11 In Figure (11a), the first light-emitting unit 20 can be a first Micro LED light-emitting unit, and the second light-emitting unit 30 can be a second Micro LED light-emitting unit. The first light-emitting unit 20 and the second light-emitting unit 30 are electrically connected to the driving circuit layer 50 respectively.

[0073] In the above embodiment of the present invention, by setting a reflective layer 40 between the first light-emitting unit 20 and the second light-emitting unit 30, it is equivalent to setting up a barrier between the first light-emitting unit 20 and the second light-emitting unit 30, and the scattered light emitted by the first light-emitting unit 20 toward the second light-emitting unit 30 will be reflected back by the reflective layer 40, and the scattered light emitted by the second light-emitting unit 30 toward the first light-emitting unit 20 will also be reflected back by the reflective layer 40, so that the mutual interference of the light emitted by the adjacent first light-emitting unit 20 and the second light-emitting unit 30 can be avoided, and the display effect of the display panel can be improved. In addition, because the reflective layer 40 can reflect the scattered light of the first light-emitting unit 20 and the second light-emitting unit 30 back, the utilization rate of light energy can also be improved, and the display effect can be further improved.

[0074] Reference Fig.14 , Fig.14 FIG. 1 is a flow chart of a method for manufacturing a display panel according to a second embodiment of the present invention. The step S100 includes:

[0075] S110, providing a base plate 10, and disposing a first black matrix layer 60 on the base plate 10;

[0076] The black matrix material 1 can be coated on the bottom plate 10, and a first black matrix layer 60 can be formed after exposure and development; Fig. 9 In Figures (9a) and (9b), the bottom plate 10 here can be a glass substrate or a transparent substrate. A layer of black matrix material 1 is evenly coated on the bottom plate 10 by coating or applying, and then exposed to ultraviolet light and developed under a photomask to form a first black matrix layer 60. The first black matrix layer 60 includes a plurality of black blocks arranged in an array. The first black matrix layer 60 mainly plays a light shielding role. The black blocks arranged in an array are spaced apart from each other, and the intervals form light outlets for the light of the first light-emitting unit 20 to pass through.

[0077] S120, disposing a driving circuit layer 50 on the first black matrix layer 60 to form a substrate; wherein the driving circuit layer 50 is formed with a second groove;

[0078] The metal material 2 is coated on the bottom plate 10 and the first black matrix layer 60, and the driving circuit layer 50 is formed after exposure and development; Fig. 9 As shown in Figure (9c), it should be noted that the exposure and development can be performed multiple times. Of course, a thin film deposition method can also be used according to actual needs to finally form the driving circuit layer 50.

[0079] The steps of S200 include:

[0080] S210, disposing the insulating layer 90 in the second groove of the driving circuit layer 50, wherein the insulating layer 90 is formed with a third groove, and disposing the bottom 43 of the reflective layer 40 in the third groove;

[0081] Specifically, hot melt adhesive 3 can be coated on the driving circuit layer 50, and a groove 4 can be formed on the hot melt adhesive 3; Fig.10 As shown in Figures (10a) and (10b), the main components of the hot melt adhesive 3 include basic resin, tackifier, viscosity modifier and antioxidant, etc.; the basic resin is composed of ethylene and vinyl acetate, and the tackifier is petroleum resin or terpene resin, and its purpose is to increase the fluidity of the hot melt adhesive 3 colloid, improve the bonding performance, and achieve the required bonding strength; the viscosity modifier is one of paraffin wax, microcrystalline wax, synthetic wax or Foto wax, and its function is to increase the fluidity of the hot melt adhesive 3 colloid and adjust the solidification speed. The melting point of the hot melt adhesive 3 is about 135°C. A groove 4 can be formed on the hot melt adhesive 3 by laser irradiation. The number of grooves 4 is multiple, corresponding to the position of the reflective layer 40 of the display panel, and the position of the groove 4 is used to set the reflective layer 40. Then, the reflective material 5 is coated in the groove 4 and on the upper surface of the driving circuit layer 50, and the reflective layer 40 is formed after exposure and development; refer to Fig.10 As shown in Figures (10c) and (10d), the reflective material 5 is fully coated in the groove 4 and on the upper surface of the driving circuit layer 50, and a suitable mask is selected as needed. After ultraviolet exposure, the excess part is removed with a developer to form a reflective layer 40 of the shape we need. The cross-sectional width of the reflective layer 40 gradually decreases from the middle 41 to the top 42 and the bottom 43 respectively. Let the width of the middle 41 of the reflective layer 40 be L2, the width of the top 42 of the reflective layer 40 be L1, and the width of the bottom 43 of the reflective layer 40 be L3, then L2>L1, and L2>L3. This can not only effectively prevent the interference of adjacent light, but also further improve the utilization rate of light energy and enhance the display effect. The reflective layer 40 can be made of a material with good light reflection performance. Of course, in order to avoid interference caused by light passing through the reflective layer 40, the reflective layer 40 can be made of metal. For example, it can be made of copper, aluminum or silver, or it can be made of a mixture of two or three of copper, aluminum and silver. Finally, remove the remaining hot melt adhesive 3; the hot melt adhesive 3 mainly plays a protective role. After the reflective layer 40 is made, refer to Fig.10 As shown in Figure (10e), the remaining hot melt adhesive 3 can be removed by UV curing or heat curing. Here, the height of the reflective layer 40 is set higher, so that one end and the other end of the reflective layer 40 are the top 42 and the bottom 43 respectively, the top 42 is inserted into the first groove, and the bottom 43 is inserted into the third groove, which can further avoid light leakage from the top or bottom of the reflective layer 40 to cause poor display.

[0082] After step S300, the following steps are further included:

[0083] S400 , installing the encapsulation layer; wherein a first groove and a reflective layer 100 are provided on the encapsulation layer 80 , the top 42 of the reflective layer 40 is installed in the first groove, and the reflective layer 100 is provided corresponding to the first light-emitting unit 20 .

[0084] Reference Fig.11 In FIG. 11a , the first light-emitting unit 20 may be a first Micro LED light-emitting unit, and the second light-emitting unit 30 may be a second Micro LED light-emitting unit. The first light-emitting unit 20 and the second light-emitting unit 30 are electrically connected to the driving circuit layer 50 , respectively. Fig.11 In Figures (11b) and (4), the encapsulation layer 80 is arranged on the top 42 of the reflective layer 40. The second black matrix layer 70 is made in the same way as the first black matrix layer 60. A layer of black matrix material 1 is evenly coated on the encapsulation layer 80 by coating or applying. After ultraviolet exposure and development under a photomask, the second black matrix layer 70 is formed. The second black matrix layer 70 includes a plurality of black blocks arranged in an array. The second black matrix layer 70 mainly plays a light shielding role. The black blocks arranged in an array are spaced apart from each other, and light outlets are formed at intervals for light from the second light-emitting unit 30 to pass through. A recessed groove is formed at the position of the encapsulation layer corresponding to the first light-emitting unit. The reflective layer 100 is arranged in the recessed groove. The length of the reflective layer 100 is greater than or equal to the distance between two adjacent reflective layers. Here, it is assumed that the first light-emitting unit emits light upward. In this embodiment, a reflective layer 100 is arranged between the first display surface and the first light-emitting unit to prevent the light generated by the first light-emitting unit from propagating from the encapsulation layer, so that the display effect of the first display surface is poor. Specifically, the height of the reflective layer 100 is at least 1 um, and the length is not less than the distance between two adjacent reflective layers. The material of the reflective layer 100 can be one or more of copper, silver, aluminum, or other alloys with low transmittance. That is, the present application is a double-sided display panel, including top emission and bottom emission structures, namely bottom emission and top emission. Specifically, bottom emission means that the light can first be emitted onto the top reflective layer 100, and then emitted downward. The reflective layer 100 is opaque and has strong reflective ability. Top emission means that the light can be emitted directly upward through the encapsulation layer 80. The reflective layer 100 can be manufactured together with the part of the reflective layer 40 embedded in the encapsulation layer 80 in terms of process, which can simplify the process. And compared with the two parts being arranged at intervals, the two parts connected as an integrated structure can also improve the reflective effect.

[0085] Of course, when the display panel needs to be provided with a reflective layer 100, a first groove and a third groove, the structural schematic diagram of the display panel is as follows: Fig.12 shown.

[0086] In some embodiments, the first light-emitting unit 20 includes a first light-emitting chip 21, a second light-emitting chip 22 and a third light-emitting chip 23, and the second light-emitting unit 30 includes a fourth light-emitting chip 31, a fifth light-emitting chip 32 and a sixth light-emitting chip 33; the step of S300 includes:

[0087] The first light-emitting unit 20 and the second light-emitting unit 30 are sequentially arranged on the driving circuit, and the first light-emitting chip 21 is arranged close to the sixth light-emitting chip 33 of an adjacent second light-emitting unit 30, and the third light-emitting chip 23 is arranged close to the fourth light-emitting chip 31 of another adjacent second light-emitting unit 30; wherein the colors of the light emitted by the first light-emitting chip 21 and the sixth light-emitting chip 33 are the same, and the colors of the light emitted by the third light-emitting chip 23 and the fourth light-emitting chip 31 are the same. When the first light-emitting unit 20 and the second light-emitting unit 30 are arranged, the third light-emitting chip 23 of the first light-emitting unit 20 can be arranged close to the fourth light-emitting chip 31 of the second light-emitting unit 30 on the right, and at the same time, the first light-emitting chip 21 of the first light-emitting unit 20 can be arranged close to the sixth light-emitting chip 33 on the left, and the colors of the light emitted by the first light-emitting chip 21 and the sixth light-emitting chip 33 can be arranged to be the same, and the colors of the light emitted by the third light-emitting chip 23 and the fourth light-emitting chip 31 can be arranged to be the same. Specifically, for the three primary colors of red, green and blue, the first light-emitting chip 21 and the sixth light-emitting chip 33 can be set to both be red light (or red pixels), the third light-emitting chip 23 and the fourth light-emitting chip 31 can be set to both be blue light (or blue pixels), and the second light-emitting chip 22 and the fifth light-emitting chip 32 can be set to both be green light (or green pixels). In this way, the light emitted by adjacent light-emitting chips has the same color, which can reduce or eliminate mutual interference between the light-emitting chips between light-emitting units.

[0088] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, and do not limit the patent scope of the present invention; although the present application is described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that under the technical concept of the present invention, the technical solutions recorded in the aforementioned embodiments can still be modified, or some or all of the technical features can be replaced by equivalents; or directly / indirectly applied to other related technical fields, and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application, and they should all be included in the scope of the claims and specification of the present application. In particular, as long as there is no structural conflict, the various technical features mentioned in each embodiment can be combined in any way. The present application is not limited to the specific embodiments disclosed herein, but includes all technical solutions that fall within the scope of the claims.

Claims

1. A display panel, characterized in that: include: substrate; A first light emitting unit distributed in an array and a second light emitting unit distributed in an array, wherein the first light emitting unit and the second light emitting unit are arranged on the same side of the substrate and are alternately distributed, and a first light emitting direction of the first light emitting unit is opposite to a second light emitting direction of the second light emitting unit; A reflective layer, wherein the reflective layer is disposed between the first light-emitting unit and the second light-emitting unit; Let the width of the middle of the reflective layer be L2, the width of the top of the reflective layer be L1, and the width of the bottom of the reflective layer be L3, then L2>L1, and L2>L3; and the cross-sectional width of the reflective layer gradually decreases from the middle to the top and the bottom respectively.

2. The display panel according to claim 1, characterized in that: The substrate comprises a driving circuit layer, and an insulating layer is arranged between the light reflecting layer and the driving circuit layer.

3. The display panel according to claim 2, characterized in that: The display panel also includes an encapsulation layer, a first groove is arranged on the encapsulation layer, a second groove is arranged on the driving circuit layer, the insulating layer is arranged in the second groove, a third groove is formed on the insulating layer, one end of the reflective layer is arranged in the first groove, and the other end of the reflective layer is arranged in the third groove.

4. The display panel according to claim 3, characterized in that: The display panel further includes a reflective layer. A recessed groove is formed on the encapsulation layer at a position corresponding to the first light-emitting unit. The reflective layer is disposed in the recessed groove. The length of the reflective layer is greater than or equal to the distance between two adjacent reflective layers.

5. The display panel according to claim 4, characterized in that: A transparent conductive layer or a semi-transparent conductive layer is also provided on the encapsulation layer. The transparent conductive layer or the semi-transparent conductive layer is alternately connected with the reflective layer, and the transparent conductive layer or the semi-transparent conductive layer is electrically connected with the cathode of the first light-emitting unit and the cathode of the second light-emitting unit.

6. The display panel according to any one of claims 1 to 5, characterized in that: The first light-emitting unit includes a first light-emitting chip, a second light-emitting chip and a third light-emitting chip arranged in sequence, the second light-emitting unit includes a fourth light-emitting chip, a fifth light-emitting chip and a sixth light-emitting chip arranged in sequence, the first light-emitting chip is arranged close to the sixth light-emitting chip of an adjacent second light-emitting unit, the third light-emitting chip is arranged close to the fourth light-emitting chip of another adjacent second light-emitting unit, the first light-emitting chip and the sixth light-emitting chip emit light of the same color, and the third light-emitting chip and the fourth light-emitting chip emit light of the same color.

7. The display panel according to any one of claims 1 to 5, characterized in that: The display panel further includes a first black matrix layer and a second black matrix layer, wherein the first black matrix layer is disposed on a first light emitting direction side of the first light emitting unit, and an orthographic projection of the first black matrix layer on the substrate covers an orthographic projection of the second light emitting unit on the substrate; The second black matrix layer is disposed on the second light emitting direction side of the second light emitting unit, and the orthographic projection of the second black matrix layer on the substrate covers the orthographic projections of the first light emitting unit and the reflective layer on the substrate.

8. A method for manufacturing a display panel, applied to manufacturing the display panel according to any one of claims 1 to 7, characterized in that: The manufacturing method of the display panel includes: providing a substrate; A reflective layer is provided on the substrate; the width of the middle of the reflective layer is L2, the width of the top of the reflective layer is L1, and the width of the bottom of the reflective layer is L3, then L2>L1, and L2>L3; and the cross-sectional width of the reflective layer gradually decreases from the middle to the top and the bottom respectively; An array of first light-emitting units and an array of second light-emitting units are arranged on the same side of the substrate; wherein the first light-emitting direction of the first light-emitting unit is opposite to the second light-emitting direction of the second light-emitting unit; and the reflective layer is located between the first light-emitting unit and the second light-emitting unit.

9. The method for manufacturing a display panel according to claim 8, characterized in that: The step of providing a substrate comprises: Providing a base plate, on which a first black matrix layer is disposed; A driving circuit layer is arranged on the first black matrix layer to form the substrate; wherein the driving circuit layer is formed with a second groove; The step of providing a reflective layer on the substrate comprises: An insulating layer is arranged in the second groove of the driving circuit layer, the insulating layer is formed with a third groove, and the bottom of the reflective layer is arranged in the third groove; After the step of arranging the first light emitting units and the second light emitting units distributed in an array on the same side of the substrate, the step further includes: The encapsulation layer is installed; wherein a first groove and a reflective layer are arranged on the encapsulation layer, the top of the reflective layer is installed in the first groove, and the reflective layer is arranged corresponding to the first light-emitting unit.

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