Quantum dot backlight module and display device

Abstract

The present disclosure provides a quantum dot backlight module and a display device, and belongs to the technical field of display. In the quantum dot backlight module, a quantum dot layer is adhered between a first substrate and a second substrate by a bonding adhesive, and an end surface of an edge of the quantum dot layer close to the first substrate is adjacent to a water and oxygen blocking structure, and the end surface is perpendicular to a bearing surface of the first substrate. In this way, the first substrate, the second substrate and the water and oxygen blocking structure can effectively prevent water and oxygen in the air from invading the quantum dot layer from the upper surface, the lower surface and the end surface of the quantum dot layer, thereby effectively reducing the probability of failure of quantum dots included in the quantum dot layer. The yield of the quantum dot backlight module provided by the present disclosure is good.

Description

Technical Field

[0001] This disclosure relates to the field of display technology, and in particular to a quantum dot backlight module and display device. Background Technology

[0002] A quantum dot backlight module is a backlight module made of quantum dots used to provide backlight for display panels.

[0003] In related technologies, a quantum dot backlight module generally includes: a substrate, a quantum dot layer and a light guide plate stacked sequentially on one side of the substrate and in a direction away from the substrate, and a light source located on one end face of the quantum dot layer. The light emitted by the light source is used to excite the quantum dots in the quantum dot layer to emit light. The light emitted by the quantum dots is homogenized by the light guide plate and then emitted, thereby providing uniform backlight for the display panel.

[0004] However, in quantum dot backlight modules of related technologies, the quantum dots in the quantum dot layer are prone to failure due to water and oxygen intrusion, resulting in a low yield of quantum dot backlight modules. Summary of the Invention

[0005] This disclosure provides a quantum dot backlight module and display device, which can solve the problem in related technologies where quantum dots in the quantum dot layer are prone to failure due to water and oxygen intrusion. The technical solution is as follows:

[0006] On one hand, a quantum dot backlight module is provided, the quantum dot backlight module comprising:

[0007] The first substrate, the quantum dot layer, and the second substrate are stacked sequentially.

[0008] In addition, at least one adhesive layer is located between the first substrate and the second substrate, the adhesive layer being used to bond the quantum dot layer between the first substrate and the second substrate;

[0009] Wherein, at least one end face of the quantum dot layer near the edge of the first substrate is adjacent to the water-oxygen barrier structure, and the end face is perpendicular to the bearing surface of the first substrate.

[0010] Optionally, each end face of the quantum dot layer near the edge of the first substrate is adjacent to the water-oxygen barrier structure.

[0011] Optionally, the quantum dot backlight module includes: a layer of adhesive layer located between the first substrate and the second substrate;

[0012] The quantum dot layer comprises: a plurality of quantum dots;

[0013] The first substrate and the second substrate have a plurality of grooves on the side of the target substrate near the adhesive, each groove being filled with at least one quantum dot, and the portion of the target substrate between at least one of the plurality of grooves and the end face of the target substrate is the water-oxygen barrier structure.

[0014] Optionally, both the first substrate and the second substrate are the target substrate;

[0015] Furthermore, the orthographic projection of any of the grooves included in the first substrate onto the adhesive does not overlap with the orthographic projection of any of the grooves included in the second substrate onto the adhesive.

[0016] Optionally, the plurality of quantum dots includes: a plurality of first quantum dots of a first color and a plurality of second quantum dots of a second color;

[0017] In this embodiment, each groove of the first substrate is filled with the first quantum dot; and each groove of the second substrate is filled with the second quantum dot.

[0018] Optionally, the quantum dot backlight module includes: a first layer of adhesive between the first substrate and the quantum dot layer, and a second layer of adhesive between the quantum dot layer and the second substrate;

[0019] The water-oxygen barrier structure is located between the first layer of adhesive and the second layer of adhesive, or the water-oxygen barrier structure is attached to the end face of the quantum dot layer, the end face of the first layer of adhesive, and the end face of the second layer of adhesive.

[0020] Optionally, the water-oxygen barrier structure is located between the first layer of adhesive and the second layer of adhesive;

[0021] The material of the water-oxygen barrier structure includes photoluminescent materials.

[0022] Optionally, the photoluminescent material is a phosphor ink.

[0023] Optionally, the water-oxygen barrier structure is attached to the end face of the quantum dot layer, the end face of the first layer of adhesive, and the end face of the second layer of adhesive.

[0024] The water-oxygen barrier structure includes water-oxygen barrier particles, or water-oxygen barrier particles and adhesive.

[0025] Optionally, the sum of the thickness of the first substrate, the thickness of the second substrate, the thickness of the first layer of adhesive, the thickness of the second layer of adhesive, and the thickness of the quantum dot layer is equal to the thickness of the water-oxygen barrier structure.

[0026] Optionally, the width of the water-oxygen barrier structure is greater than or equal to 0.05 mm and less than or equal to 0.3 mm, and the width direction of the water-oxygen barrier structure is perpendicular to the end face.

[0027] Optionally, the quantum dot backlight module further includes:

[0028] A first light diffusing agent layer located on the side of the first substrate away from the quantum dot layer;

[0029] And a second light diffusing agent layer located on the side of the second substrate away from the quantum dot layer.

[0030] Optionally, the quantum dot backlight module further includes:

[0031] An optical gain film located on the side of the second substrate away from the quantum dot layer.

[0032] Optionally, the quantum dot backlight module further includes:

[0033] A plurality of light-emitting units are located on the side of the first substrate away from the quantum dot layer, each of the light-emitting units being used to emit light of a third color.

[0034] Optionally, the third color is blue, and the quantum dot layer includes a plurality of red first quantum dots and a plurality of green second quantum dots.

[0035] On the other hand, a display device is provided, the display device comprising: a display panel, and a quantum dot backlight module as described in any of the above aspects;

[0036] The display panel is located on one side of the quantum dot backlight module, and the quantum dot backlight module is used to provide backlight for the display panel.

[0037] The beneficial effects of the technical solution provided in this disclosure can include at least:

[0038] A quantum dot backlight module and display device are provided. In this quantum dot backlight module, a quantum dot layer is bonded to a first substrate and a second substrate by an adhesive, and a water-oxygen barrier structure is adjacent to the edge of the quantum dot layer near the first substrate. This end face is perpendicular to the bearing surface of the first substrate. Thus, the first substrate, the second substrate, and the water-oxygen barrier structure can effectively prevent water and oxygen in the air from intruding into the quantum dot layer from its upper surface, lower surface, and end face, thereby effectively reducing the probability of quantum dot failure. The quantum dot backlight module provided in this disclosure has a good yield. Attached Figure Description

[0039] To more clearly illustrate the technical solutions in the embodiments of this disclosure, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this disclosure. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0040] Figure 1 This is a schematic diagram of the structure of a quantum dot backlight module provided in an embodiment of this disclosure;

[0041] Figure 2 This is a schematic diagram of the structure of a quantum dot layer provided in an embodiment of this disclosure;

[0042] Figure 3 This is a schematic diagram of another quantum dot backlight module provided in this embodiment;

[0043] Figure 4 This is a schematic diagram of the structure of a first substrate provided in an embodiment of this disclosure;

[0044] Figure 5 This is a schematic diagram of the structure of a second substrate provided in an embodiment of this disclosure;

[0045] Figure 6 This is a schematic diagram of the structure of another quantum dot backlight module provided in this embodiment;

[0046] Figure 7 This is a schematic diagram of the structure of another quantum dot backlight module provided in this embodiment;

[0047] Figure 8 This is a schematic diagram of another quantum dot backlight module provided in the embodiments of this disclosure;

[0048] Figure 9 This is a schematic diagram of another quantum dot backlight module provided in the embodiments of this disclosure;

[0049] Figure 10 This is a schematic diagram of the structure of another quantum dot backlight module provided in this embodiment;

[0050] Figure 11 This is a schematic diagram of another quantum dot backlight module provided in the embodiments of this disclosure;

[0051] Figure 12 This is a schematic diagram of the structure of a display device provided in an embodiment of this disclosure;

[0052] Figure 13 This is a partial structural schematic diagram of a display panel provided in an embodiment of the present disclosure;

[0053] Figure 14This is a schematic diagram of another quantum dot backlight module provided in the embodiments of this disclosure;

[0054] Figure 15 This is a schematic diagram of another quantum dot backlight module provided in the embodiments of this disclosure. Detailed Implementation

[0055] To make the objectives, technical solutions, and advantages of this disclosure clearer, the disclosure will now be described in further detail with reference to the accompanying drawings.

[0056] The terminology used in the embodiments of this disclosure is for illustrative purposes only and is not intended to limit the disclosure. Unless otherwise defined, the technical or scientific terms used in the embodiments of this disclosure should be understood in their ordinary sense by one of ordinary skill in the art to which this disclosure pertains. The terms "first," "second," "third," and similar words used in the patent application specification and claims of this disclosure do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Similarly, the terms "a" or "an" and similar words do not indicate a quantity limitation, but rather indicate the presence of at least one. The terms "comprising" or "including" and similar words mean that the elements or objects preceding "comprising" or "including" encompass the elements or objects listed following "comprising" or "including" and their equivalents, and do not exclude other elements or objects. The terms "connected" or "linked" and similar words are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. "Up," "down," "left," "right," etc., are used only to indicate relative positional relationships, and these relative positional relationships may change accordingly when the absolute position of the described object changes. In the embodiments of this disclosure, "and / or" indicates that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, and B existing alone. The character " / " generally indicates that the preceding and following objects have an "or" relationship.

[0057] Figure 1 This is a schematic diagram of the structure of a quantum dot backlight module provided in an embodiment of this disclosure. Figure 1 As shown, the quantum dot backlight module includes: a first substrate 01, a quantum dot layer (also known as a quantum dot ink coating) 02 and a second substrate 03 stacked in sequence, and at least one layer of adhesive 04 located between the first substrate 01 and the second substrate 03.

[0058] For example, refer to Figure 1 The quantum dot backlight module shown includes a layer of adhesive 04. This adhesive 04 is used to bond the quantum dot layer 02 between a first substrate 01 and a second substrate 03.

[0059] Combination Figure 1 It can be seen that by positioning the quantum dot layer 02 between the first substrate 01 and the second substrate 03, the problem of quantum dot failure caused by water and oxygen in the air (i.e., water vapor and oxygen) penetrating the quantum dot layer 02 from its upper and lower surfaces can be effectively prevented. Quantum dot failure refers to the following: the material on the surface of the quantum dots detaches due to the influence of water and oxygen, or the quantum dots fail to emit light normally or do not emit light at all after a chemical reaction with water and oxygen.

[0060] Continue to refer to Figure 1 As can be seen, at least one end face of the quantum dot layer 02 near the edge of the first substrate 01 described in this embodiment is adjacent to (i.e., adjacent and in contact with) the water-oxygen barrier structure, and this end face is perpendicular to the bearing surface of the first substrate 01. Based on this, this end face can also be referred to as the side face of the quantum dot layer 02 near the edge of the first substrate 01. This water-oxygen barrier structure can be used to effectively prevent water and oxygen from invading into the quantum dot layer 02 from the end face of the quantum dot layer 02, thus preventing the quantum dots in the quantum dot layer 02 from failing.

[0061] In summary, this disclosure provides a quantum dot backlight module in which a quantum dot layer is bonded to a first substrate and a second substrate using adhesive. A water-oxygen barrier structure is abutted against the edge of the quantum dot layer near the first substrate, and this edge is perpendicular to the bearing surface of the first substrate. Thus, the first substrate, the second substrate, and the water-oxygen barrier structure effectively prevent water and oxygen from the air from intruding into the quantum dot layer from its upper surface, lower surface, and edge, thereby effectively reducing the probability of quantum dot failure. The quantum dot backlight module provided by this disclosure has a good yield rate.

[0062] Optionally, in this embodiment, each end face of the quantum dot layer 02 near the edge of the first substrate 01 can be adjacent to the water-oxygen barrier structure. This effectively prevents water and oxygen from intruding into the quantum dot layer 02 from each end face, thus avoiding the problem of quantum dot failure in the quantum dot layer 02. In other words, it achieves all-around protection for the quantum dot layer 02, further ensuring a high yield rate for the quantum dot backlight module.

[0063] For example, the quantum dot layer 02 can be rectangular, and correspondingly, the quantum dot layer 02 can include four end faces, each of which can be adjacent to a water-oxygen barrier structure. Of course, in some embodiments, the quantum dot layer 02 can also be other shapes, such as circular or trapezoidal.

[0064] Figure 2 This is a schematic diagram of a quantum dot layer structure provided in an embodiment of this disclosure. For example... Figure 2As shown, the quantum dot layer 02 may include a plurality of quantum dots. These quantum dots may include a plurality of first quantum dots 021 of a first color and a plurality of second quantum dots 022 of a second color.

[0065] Optionally, each quantum dot can be a core-shell structured luminescent nanocrystal.

[0066] Figure 3 This is a schematic diagram of another display module provided in an embodiment of this disclosure. For example... Figure 3 As shown, the quantum dot backlight module may further include a plurality of light-emitting units 05 located on the side of the first substrate 01 away from the quantum dot layer 02. The light-emitting unit 05 may be a light-emitting diode (LED).

[0067] Each light-emitting unit 05 can emit light of a third color. This third-color light can be used to excite multiple first quantum dots 021 of a first color to emit light of the first color, and to excite multiple second quantum dots 022 of a second color to emit light of the second color. Furthermore, the first-color light, the second-color light, and the third-color light can be further coupled into white light, which is emitted through the second substrate 03. In other words, this white light is the backlight provided by the quantum dot backlight module for the display panel.

[0068] Optionally, the first color can be red, the second color can be green, and the third color can be blue. That is, in the embodiments of this disclosure, referring to... Figure 3 Blue light can be used to excite multiple red first quantum dots 021 in the quantum dot layer 02 to emit red light, and multiple green second quantum dots 022 to emit green light. Then, the blue, red, and green light can be further coupled to generate white light, providing backlight for the display panel. Thus, by setting a water and oxygen barrier structure, water and oxygen are effectively prevented from invading the quantum dot layer 02 from its end face. This effectively avoids the problem of some red first quantum dots 021 and some green second quantum dots 022 near the edge of the first substrate 01 failing to emit light properly, resulting in blue backlight emitted from the failed area in the quantum dot backlight module, and consequently causing a bluish tint at the edge of the display panel. The red first quantum dots 021 can also be called red quantum dot nano-phosphors, and the green second quantum dots 022 can also be called green quantum dot nano-phosphors.

[0069] Optionally, the peak range of the blue light emitted by the light-emitting unit 05 can be between 360 nanometers (nm) and 475 nm. The peak range of the red light emitted by the first quantum dot 021 can be between 610 nm and 670 nm. The peak range of the green light emitted by the second quantum dot 022 can be between 510 nm and 550 nm. Testing has shown that within these peak ranges, the quantum dot backlight module provides good backlight performance, and the display panel displays a high color gamut based on this backlight. Here, spectrum refers to the curve of luminous intensity changing with the wavelength of light; color gamut refers to the range of colors that can be displayed.

[0070] Optionally, the first substrate 01 and / or the second substrate 03 described in this embodiment of the present disclosure may both be light-transmitting glass substrates. For example, the material of the glass substrate may include sodium-calcium ultra-white glass.

[0071] Because the glass substrate made of sodium-calcium ultra-white glass material has good light transmittance (i.e., the ability of the glass substrate to transmit light emitted by the light-emitting unit 05), generally about 45% to 55%, and good haze (i.e., the ability of the glass substrate to scatter incident light), generally about 80% to 95%, it can ensure that the quantum dot backlight module provides a good backlight effect to the display panel, thereby ensuring a good display effect of the display panel and meeting the user's taste requirements for display effect.

[0072] Of course, in some embodiments, the first substrate 01 and / or the second substrate 03 may be flexible substrates made of a light-transmitting flexible material. For example, the flexible material may include polyimide (PI).

[0073] Optionally, the adhesive 04 described in this disclosure can be a solid optically clear adhesive (OCA). Of course, in some embodiments, the adhesive 04 can also be a liquid optically clear resin (OCR), which can also be called liquid optical clear adhesive (LOCA).

[0074] By employing a transparent optical adhesive and a light-transmitting substrate, it can be ensured that the light emitted by the light-emitting unit 05 reliably illuminates the quantum dot layer 02 and is emitted through the second substrate 03. Furthermore, this ensures that the quantum dot backlight module reliably provides backlight to the display panel and also improves the luminous intensity of the backlight.

[0075] Optionally, in the embodiments of this disclosure, the following implementation methods can be used to effectively prevent water and oxygen from invading into the quantum dot layer 02 through the end face of the quantum dot layer 02.

[0076] As an optional implementation method, combined with Figure 1 , Figures 3 to 5 The quantum dot backlight module described in this embodiment may include an adhesive layer 04 located between a first substrate 01 and a second substrate 03. Furthermore, the target substrate in the first substrate 01 and the second substrate 03 may have multiple grooves C1 on the side near the adhesive layer 04, and each groove C1 may be filled with at least one quantum dot. The groove C1 structure may also be referred to as a groove microstructure.

[0077] Based on this structure, the water and oxygen barrier structure described in this embodiment can be a portion of the target substrate between at least one of the plurality of grooves C1 and the end face of the target substrate. It should be noted that the at least one groove C1 includes the groove C1 closest to the edge of the first substrate 01 among the plurality of grooves C1. In other words, the groove C1 closest to the edge of the first substrate 01 may have a gap with the edge of the first substrate 01.

[0078] Example, reference Figure 1 , Figures 3 to 5 The first substrate 01 and the second substrate 03 shown are both target substrates, that is, both the first substrate 01 and the second substrate 03 include a plurality of grooves C1. Moreover, for the first substrate 01, the substrate between the groove C1 closest to the edge of the first substrate 01 and the edge of the first substrate 01 can be a water and oxygen barrier structure. For the second substrate 03, the substrate between the groove C1 closest to the edge of the second substrate 03 and the edge of the second substrate 03 can be a water and oxygen barrier structure.

[0079] Optionally, provided that both the first substrate 01 and the second substrate 03 have multiple grooves C1, combined with Figure 3 The orthographic projection of any groove C1 included in the first substrate 01 onto the adhesive 04 does not overlap with the orthographic projection of any groove C1 included in the second substrate 03 onto the adhesive 04, and they are arranged in an alternating pattern.

[0080] Assuming that the groove C1 included in the first substrate 01 is called the first groove and the groove C1 included in the second substrate 03 is called the second groove, then the staggered arrangement means that in the first direction X, the plurality of grooves C1 included in the first substrate 01 and the plurality of grooves C1 included in the second substrate 03 are arranged in a staggered manner in the order of a first groove and a second groove.

[0081] Optionally, a plurality of first quantum dots 021 of a first color and a plurality of second quantum dots 022 of a second color are arranged alternately and at intervals in the orthographic projection of the adhesive 04.

[0082] Continue to refer to Figures 3 to 5Each groove C1 of the first substrate 01 can be filled with a first quantum dot 021. Each groove C1 of the second substrate 03 can be filled with a second quantum dot 022. Thus, based on the staggered arrangement of the plurality of grooves C1 of the first substrate 01 and the plurality of grooves C1 of the second substrate 03, the first quantum dots 021 of the first color and the second quantum dots 022 of the second color can be arranged in a staggered manner.

[0083] Of course, in some embodiments, each groove C1 of the first substrate 01 may be filled with a second quantum dot 022. Each groove C1 of the second substrate 03 may be filled with a first quantum dot 021.

[0084] Optionally, when both the first substrate 01 and / or the second substrate 03 are glass substrates, a mold casting process can be used to create the various grooves C1 on the glass substrate. Because this mold casting process is simple, it is beneficial for the mass production of quantum dot backlight modules.

[0085] As another optional implementation, Figure 6 An optional structure for a quantum dot backlight module is shown. Figure 7 Another optional structure for a quantum dot backlight module is shown, see reference. Figure 6 and Figure 7 As can be seen, the quantum dot backlight module may include: a first adhesive layer 041 located between the first substrate 01 and the quantum dot layer 02, and a second adhesive layer 042 located between the quantum dot layer 02 and the second substrate 03. In this implementation, the quantum dot backlight module may also include a water and oxygen blocking structure 06.

[0086] Optionally, refer to Figure 6 As can be seen from the quantum dot backlight module shown, the water and oxygen blocking structure 06 can be located between the first adhesive layer 041 and the second adhesive layer 042.

[0087] Or, refer to Figure 7 As can be seen from the quantum dot backlight module shown, the water-oxygen barrier structure 06 can be attached to the end face of the quantum dot layer 02, the end face of the first adhesive layer 041, and the end face of the second adhesive layer 042. That is, the water-oxygen barrier structure 06 may not be located between the first adhesive layer 041 and the second adhesive layer 042, but rather attached to the sidewalls of the first adhesive layer 041 and the second adhesive layer 042.

[0088] for Figure 6 As shown in the structure, the material of the water and oxygen blocking structure 06 may include a photoluminescent material with good water and oxygen blocking performance. A photoluminescent material is a material that can emit light when excited by light.

[0089] For example, the photoluminescent material may include phosphor ink, and the phosphor ink may be coated between the first adhesive layer 041 and the second adhesive layer 042 to form the water and oxygen barrier structure 06. The phosphor ink material may include potassium fluorosilicate (KSF) containing tetravalent manganese ions.

[0090] With the water-oxygen barrier structure 06 positioned between the first adhesive layer 041 and the second adhesive layer 042, and made of a photoluminescent material with excellent water-oxygen barrier properties, this not only effectively prevents water and oxygen from intruding into the quantum dot layer 02 from its end face, but also ensures that the area in the quantum dot backlight module with the water-oxygen barrier structure 06 can reliably emit backlight. Furthermore, it ensures that the portion of the display panel overlapping the water-oxygen barrier structure 06 can also effectively receive backlight for reliable image display. In other words, it avoids image loss on the display panel. Image loss refers to the inability of certain areas of the display panel to display images correctly.

[0091] Optionally, for Figure 6 In the structure shown, the width d1 of the water-oxygen barrier structure 06 in the first direction X can be much smaller than the width of the quantum dot layer 02 in the first direction X.

[0092] For example, the width d1 of the water-oxygen barrier structure 06 in the first direction X can be between 2 mm and 4 mm. That is, a region can be reserved 2 mm to 4 mm from the end face of the quantum dot layer 02 near the edge of the first substrate 01 to provide the water-oxygen barrier structure 06.

[0093] Since the light-emitting effect of the water-oxygen blocking structure 06 made of the above-mentioned photoluminescent material is not as good as that of the quantum dots included in the quantum dot layer 02, by setting the width of the water-oxygen blocking structure 06 to be smaller, it is possible to ensure that the backlight effect provided by the quantum dot backlight module is better while achieving the purpose of blocking water and oxygen.

[0094] for Figure 7 As shown, the water-oxygen barrier structure 06 may include water-oxygen barrier particles with water-oxygen barrier properties, or it may include water-oxygen barrier particles with water-oxygen barrier properties and an adhesive. That is, the water-oxygen barrier structure 06 can be formed by mixing the water-oxygen barrier particles and the adhesive.

[0095] Specifically, for the water-oxygen barrier structure 06, which consists only of water-oxygen barrier particles, an adhesive can be used to bond the water-oxygen barrier structure 06 to the end faces of the quantum dot layer 02, the first adhesive layer 04, and the second adhesive layer 04. The bonding operation can be completed using automated equipment.

[0096] For example, the automated equipment can have a robotic arm that can adsorb the water-oxygen barrier structure 06 and control the robotic arm to move to the end face of the quantum dot layer 02 to attach the water-oxygen barrier structure 06 to that end face. After a period of time (e.g., 2 minutes), once the adhesive has cured, the automated equipment can control the robotic arm to separate from the water-oxygen barrier structure 06.

[0097] For the water-oxygen barrier structure 06 formed by mixing water-oxygen barrier particles and adhesive, the water-oxygen barrier structure 06 can be first attached to the end face of the quantum dot layer 02, the end face of the first adhesive layer 04, and the end face of the second adhesive layer 04. Then, the attached water-oxygen barrier structure 06 can be directly irradiated and cured by ultraviolet (UV) rays, so that the water-oxygen barrier structure 06 can be reliably attached to the end face of the quantum dot layer 02, the end face of the first adhesive layer 041, and the end face of the second adhesive layer 042.

[0098] It should be noted that, due to the fluidity of the adhesive, the cross-section of the water-oxygen barrier structure 06, formed by mixing the water-oxygen barrier particles and the adhesive, can be [missing information]. Figure 7 The rectangle shown, or, could also be in the shape of... Figure 8 The semicircle shown.

[0099] Optionally, the adhesive described in the above embodiments can be a light color such as transparent, white, silver, or gray. This can improve the transmittance of light emitted by the light-emitting unit 05 through the quantum dot layer 02.

[0100] Optionally, the water-oxygen barrier structure 06 includes water-oxygen barrier particles with a water-oxygen permeability (i.e., the ability to allow water and oxygen to pass through) of less than 1 × 10⁻⁶. -2 grams per square meter per day (g×m) -2 ×day -1 That is, the water-oxygen permeability can be relatively low, thus effectively blocking water and oxygen.

[0101] Optionally, for Figure 7 In the structure shown, the thickness d2 of the water-oxygen barrier structure 06 can be equal to the sum of the thicknesses of the first substrate 01, the second substrate 03, the first adhesive layer 041, the second adhesive layer 042, and the quantum dot layer 02. That is, the water-oxygen barrier structure 06 can be attached to the end faces of the first substrate 01, the second substrate 03, the first adhesive layer 041, the second adhesive layer 042, and the quantum dot layer 02. Furthermore, the width d3 of the water-oxygen barrier structure 06 can be greater than or equal to 0.05 mm and less than or equal to 0.3 mm.

[0102] In this embodiment, the width direction X of the water-oxygen barrier structure 06 can be perpendicular to the end face of the quantum dot layer 02, and the thickness direction Y of the water-oxygen barrier structure 06 can be parallel to the end face of the quantum dot layer 02, that is, the thickness direction X and the width direction Y can be perpendicular. The width direction X is the first direction X described in the above embodiment.

[0103] By setting a water and oxygen blocking structure 06 attached to the end face of the quantum dot layer 02, the end face of the first adhesive layer 041, and the end face of the second adhesive layer 042, the display panel can reliably avoid image loss while effectively blocking water and oxygen.

[0104] Combination Figure 2 , Figures 6 to 8 It can be seen that the quantum dot layer 02 may include a plurality of first quantum dots 021 of a first color and a plurality of second quantum dots 022 of a second color that are uniformly dispersed.

[0105] Or, refer to Figure 9 The quantum dot layer 02 may include multiple quantum dot groups Z1, each quantum dot group Z1 may include a column of first quantum dots 021 of a first color and a column of second quantum dots 022 of a second color. Moreover, the multiple quantum dot groups Z1 may be arranged sequentially at intervals along the first direction X.

[0106] It should be noted that the first quantum dot 021 of the first color and the second quantum dot 022 of the second color can be applied by coating according to... Figure 9 The arrangement shown is such that the first substrate 01 is coated on the side away from the light-emitting unit 05, and then the quantum dot layer 02 is cured by UV.

[0107] Due to the limitations of the coating process, if it is necessary to simultaneously form a row of first quantum dots 021 and a row of second quantum dots 022, then refer to... Figure 9 In each coated quantum dot group, there can be a gap between a column of first quantum dots 021 and a column of second quantum dots 022 of the second color. This prevents the first quantum dots 021 of the first color and the second quantum dots 022 of the second color from mixing together after flowing, thus affecting the luminescence effect of the quantum dot layer 02. This gap can be referred to as a reserved coating tolerance.

[0108] Figure 10 This is a schematic diagram of another quantum dot backlight module provided in this disclosure embodiment, as shown below. Figure 10 As shown, the quantum dot backlight module described in this embodiment may further include: a first light diffusing agent layer 07 located on the side of the first substrate 01 away from the quantum dot layer 02; and a second light diffusing agent layer 08 located on the side of the second substrate 03 away from the quantum dot layer 02.

[0109] The first light diffusing agent layer 07 and the second light diffusing agent layer 08 can be used to atomize the light emitted by the multiple light-emitting units 05. Atomization means breaking down the light. In this way, the backlight provided by the quantum dot backlight module to the display panel is uniform and soft, thereby making the image displayed on the display panel based on the backlight uniform and soft.

[0110] Optionally, the materials of the first light diffusing agent layer 07 and the second light diffusing agent layer 08 may include acrylic resin. Furthermore, the acrylic resin may be uniformly coated onto the side of the first substrate 01 away from the quantum dot layer 02 using a roller coating method to form the first light diffusing agent layer 07, and uniformly coated onto the side of the second substrate 03 away from the quantum dot layer 02 to form the second light diffusing agent layer 08.

[0111] Figure 11 This is a schematic diagram of the structure of another quantum dot backlight module provided in this disclosure embodiment, as shown below. Figure 11 As shown, the quantum dot backlight module described in this embodiment may further include an optical gain film 09 located on the side of the second substrate 03 away from the quantum dot layer 02.

[0112] The optical gain film 09 can be used to increase the intensity of white light emitted through the second substrate 03. Accordingly, it ensures that the quantum dot backlight module ultimately provides a high intensity of backlight to the display panel, thereby ensuring a better display effect of the image displayed on the display panel based on the backlight.

[0113] Optionally, the optical gain film 09 may include a dual brightness enhancement film (DBEF), a prism film, a diffuser film, or an optical composite film. It is understood that a suitable optical gain film 09 can be selected based on the user's brightness requirements for the image displayed on the display panel.

[0114] As described above, the quantum dot backlight module provided in this disclosure not only effectively blocks water and oxygen intrusion, but also ensures that the backlight does not cause image loss on the display panel. Therefore, the quantum dot backlight module provided in this disclosure can be applied to various splicing screen display devices. A splicing screen display device refers to a display device comprising multiple spliced ​​displays (i.e., display panels).

[0115] It should be noted that, Figure 1 , Figure 3 as well as Figures 6 to 10 Only half of the quantum dot backlight module structure is shown; the overall structure of the quantum dot backlight module can be found by referring to [reference needed]. Figure 11 .

[0116] In summary, this disclosure provides a quantum dot backlight module in which a quantum dot layer is bonded to a first substrate and a second substrate using adhesive. A water-oxygen barrier structure is abutted against the edge of the quantum dot layer near the first substrate, and this edge is perpendicular to the bearing surface of the first substrate. Thus, the first substrate, the second substrate, and the water-oxygen barrier structure effectively prevent water and oxygen from the air from intruding into the quantum dot layer from its upper surface, lower surface, and edge, thereby effectively reducing the probability of quantum dot failure. The quantum dot backlight module provided by this disclosure has a good yield rate.

[0117] Figure 12 This is a schematic diagram of the structure of a display device provided in an embodiment of the present disclosure. The display device may include: a display panel 10, and a quantum dot backlight module 00 provided in the above embodiment.

[0118] The display panel 10 can be located on one side of the quantum dot backlight module 00, which can be used to provide backlight for the display panel 10 to drive the display panel 10 to display images.

[0119] It should be noted that there is generally no gap between the quantum dot backlight module 00 and the display panel 10, meaning that the quantum dot backlight module 00 and the display panel 10 can be fitted together. This avoids light leakage from the backlight provided by the quantum dot backlight module 00, thus ensuring that the display panel 10 can receive sufficient backlight.

[0120] Figure 13 This is a schematic diagram of the structure of a display panel provided in an embodiment of this disclosure. Figure 13 As shown, the display panel 10 may include: an array substrate 101, and a plurality of pixels 102 and a plurality of black matrices (BM) 103 located on one side of the array substrate 101.

[0121] Each pixel 102 may include multiple sub-pixels of different colors. Among the multiple black matrices 103, one black matrix 103 is located near the edge of the array substrate 101, and the remaining black matrices 103 are located between each pair of adjacent sub-pixels.

[0122] Optionally, refer to Figure 13Each pixel 102 may include three different colored sub-pixels: a red (R) sub-pixel 1021, a green (G) sub-pixel 1022, and a blue (B) sub-pixel 1023. Assume that the width of each R sub-pixel 1021, each G sub-pixel 1022, and each B sub-pixel 1023 in the first direction X is x; the width of the BM layer 103 located between two adjacent sub-pixels in the first direction X is y; the width of the BM layer 103 near the edge of the array substrate 101 in the first direction X is z; and the height of the R sub-pixel 1021, G sub-pixel 1022, and B sub-pixel 1023 in the second direction Y is h. The first direction X and the second direction Y can be perpendicular. The second direction Y is the width direction Y described above.

[0123] Combination Figure 14 It can be seen that, for Figure 3 In the structure shown, the quantum dot backlight module 00 includes multiple grooves C1, and the width of each groove C1 in the first direction X can also be x. In every three adjacent grooves C1, the distance between the middle groove C1 and another groove C1 in the first direction X can be y, and the distance between the middle groove C1 and another groove C1 in the first direction X can be x+2y. The distance between the groove C1 closest to the edge of the first substrate 01 and the edge of the first substrate 01 in the first direction X can be z. The height of each groove C1 in the second direction Y can be h.

[0124] Furthermore, assuming that each groove C1 of the first substrate 01 is filled with red quantum dots and each groove C1 of the second substrate 03 is filled with green quantum dots, the orthographic projection of each groove C1 filled with red quantum dots on the adhesive 04 overlaps with the orthographic projection of an R sub-pixel 1021 on the adhesive 04. The orthographic projection of each groove C1 filled with green quantum dots on the adhesive 04 overlaps with the orthographic projection of a G sub-pixel 1022 on the adhesive 04. The orthographic projection of the region between two grooves with a spacing of x+2y on the adhesive 04 overlaps with the orthographic projection of a B sub-pixel 1023 on the adhesive 04.

[0125] In this way, it can be ensured that the red light emitted by the red quantum dot 021 precisely illuminates the location of the R sub-pixel 1021, the green light emitted by the green quantum dot 022 precisely illuminates the location of the G sub-pixel 1022, and the blue light emitted by the light-emitting unit 05 can directly pass through the area without quantum dots to illuminate the location of the B sub-pixel 1023. This significantly improves the color gamut of the image displayed on the display panel 10, generally achieving a color gamut greater than 100% NTSC. NTSC is a standard used to indicate color gamut, established by the National Television Standards Committee (NTSC) in the United States. Furthermore, this ensures better color performance of the display device.

[0126] Combination Figure 15 It can be seen that, for Figure 9 In the structure shown, the width of each column of first quantum dots 021 and each column of second quantum dots 022 in the first direction X, and the spacing between any two adjacent quantum dot groups Z1 in the first direction X, can both be (3x+2y) / 3. The spacing between the quantum dot groups near the edge of the first substrate 01 and the end face of the first substrate 01 in the first direction X can be z. The height of each column of first quantum dots 021 and each column of second quantum dots 022 in the second direction Y can both be h (not shown in the figure).

[0127] Optionally, based on the premise that the first quantum dot 021 is a red quantum dot and the second quantum dot 022 is a green quantum dot, with reference to Figure 9 and Figure 15 The orthographic projection of each column of red quantum dots 021 onto the adhesive 04 can cover the orthographic projection of R sub-pixels 1021 onto the adhesive 04, the orthographic projection of each column of green quantum dots 022 onto the adhesive 04 can cover the orthographic projection of G sub-pixels 1022 onto the adhesive 04, and the orthographic projection of the middle region of every two adjacent quantum dot groups in the first direction X onto the adhesive 04 can cover the orthographic projection of B sub-pixels 1023 onto the adhesive 04. In this way, it can be ensured that the red light emitted by the red quantum dots precisely illuminates the location of R sub-pixels 1021, the green light emitted by the green quantum dots precisely illuminates the location of G sub-pixels 1022, and the blue light emitted by the light-emitting unit 05 can directly penetrate the area without quantum dots and illuminate the location of B sub-pixels 1023. Therefore, the color gamut of the image displayed on the display panel 10 can be significantly improved.

[0128] Compared to Figures 6 to 8 In other words, because Figure 14 and Figure 15In the structure shown, there is a dedicated area for transmitting blue light, which allows the blue light emitted by the light-emitting unit 05 to directly illuminate the area where the blue sub-pixel B is located through the second substrate 03. This improves the utilization rate of the blue light emitted by the light-emitting unit 05, thereby increasing the light intensity of the backlight provided by the quantum dot backlight module to the display panel.

[0129] Optionally, the display device described in this disclosure embodiment can be: a liquid crystal display (LCD), an organic light-emitting diode (OLED) display device, a liquid crystal display device, an active-matrix organic light-emitting diode (AMOLED) display device, a mobile phone, a tablet computer, a flexible display device, a television set, a monitor, or any other product or component with display function.

[0130] The above description is merely an optional embodiment of this application and is not intended to limit this application. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A quantum dot backlight module, characterized in that, The quantum dot backlight module includes: The first substrate, the quantum dot layer, and the second substrate are stacked sequentially. And, an adhesive layer located between the first substrate and the second substrate, the adhesive layer being used to bond the quantum dot layer between the first substrate and the second substrate; Wherein, at least one end face of the quantum dot layer near the edge of the first substrate is adjacent to the water and oxygen barrier structure, and the end face is perpendicular to the bearing surface of the first substrate. The quantum dot layer comprises: a plurality of quantum dots; The first substrate and the second substrate have a plurality of grooves on the side of the target substrate near the adhesive, each groove being filled with at least one quantum dot, and the portion of the target substrate between at least one of the grooves and the end face of the target substrate is the water and oxygen barrier structure. Both the first substrate and the second substrate are light-transmitting substrates, and the adhesive is an optically transparent adhesive.

2. The quantum dot backlight module according to claim 1, characterized in that, Each end face of the quantum dot layer near the edge of the first substrate is adjacent to the water-oxygen barrier structure.

3. The quantum dot backlight module according to claim 1, characterized in that, Both the first substrate and the second substrate are the target substrate; Furthermore, the orthographic projection of any of the grooves included in the first substrate onto the adhesive does not overlap with the orthographic projection of any of the grooves included in the second substrate onto the adhesive.

4. The quantum dot backlight module according to claim 3, characterized in that, The plurality of quantum dots includes: a plurality of first quantum dots of a first color and a plurality of second quantum dots of a second color; In this embodiment, each groove of the first substrate is filled with the first quantum dot; and each groove of the second substrate is filled with the second quantum dot.

5. The quantum dot backlight module according to any one of claims 1 to 4, characterized in that, The quantum dot backlight module also includes: A first light diffusing agent layer located on the side of the first substrate away from the quantum dot layer; And a second light diffusing agent layer located on the side of the second substrate away from the quantum dot layer.

6. The quantum dot backlight module according to any one of claims 1 to 4, characterized in that, The quantum dot backlight module also includes: An optical gain film located on the side of the second substrate away from the quantum dot layer.

7. The quantum dot backlight module according to any one of claims 1 to 4, characterized in that, The quantum dot backlight module also includes: A plurality of light-emitting units are located on the side of the first substrate away from the quantum dot layer, each of the light-emitting units being used to emit light of a third color.

8. The quantum dot backlight module according to claim 7, characterized in that, The third color is blue, and the quantum dot layer includes multiple red first quantum dots and multiple green second quantum dots.

9. A display device, characterized in that, The display device includes: a display panel, and a quantum dot backlight module as described in any one of claims 1 to 8; The display panel is located on one side of the quantum dot backlight module, and the quantum dot backlight module is used to provide backlight for the display panel.

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