CN114627750B - Backlight module and display device - Google Patents
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- CN114627750B CN114627750B CN202210287548.3A CN202210287548A CN114627750B CN 114627750 B CN114627750 B CN 114627750B CN 202210287548 A CN202210287548 A CN 202210287548A CN 114627750 B CN114627750 B CN 114627750B
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- 239000002096 quantum dot Substances 0.000 claims abstract description 166
- 238000009792 diffusion process Methods 0.000 claims abstract description 65
- 239000002245 particle Substances 0.000 claims abstract description 22
- 239000010410 layer Substances 0.000 claims description 195
- 239000012790 adhesive layer Substances 0.000 claims description 25
- 239000000853 adhesive Substances 0.000 claims description 16
- 230000001070 adhesive effect Effects 0.000 claims description 16
- 230000002708 enhancing effect Effects 0.000 claims description 12
- 239000000463 material Substances 0.000 description 31
- 239000011257 shell material Substances 0.000 description 16
- 239000010408 film Substances 0.000 description 13
- 239000004065 semiconductor Substances 0.000 description 9
- 238000010586 diagram Methods 0.000 description 8
- 230000000694 effects Effects 0.000 description 8
- 229910052751 metal Inorganic materials 0.000 description 7
- 229920002120 photoresistant polymer Polymers 0.000 description 7
- 238000004519 manufacturing process Methods 0.000 description 4
- 239000002184 metal Substances 0.000 description 4
- 230000003287 optical effect Effects 0.000 description 4
- SBIBMFFZSBJNJF-UHFFFAOYSA-N selenium;zinc Chemical compound [Se]=[Zn] SBIBMFFZSBJNJF-UHFFFAOYSA-N 0.000 description 4
- 125000006850 spacer group Chemical group 0.000 description 4
- 239000011258 core-shell material Substances 0.000 description 3
- 230000003993 interaction Effects 0.000 description 3
- 239000010409 thin film Substances 0.000 description 3
- 229910052793 cadmium Inorganic materials 0.000 description 2
- BDOSMKKIYDKNTQ-UHFFFAOYSA-N cadmium atom Chemical compound [Cd] BDOSMKKIYDKNTQ-UHFFFAOYSA-N 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- CWYNVVGOOAEACU-UHFFFAOYSA-N Fe2+ Chemical compound [Fe+2] CWYNVVGOOAEACU-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000003086 colorant Substances 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000004020 luminiscence type Methods 0.000 description 1
- 239000002086 nanomaterial Substances 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 239000004054 semiconductor nanocrystal Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
- G09F9/00—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements
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Abstract
The invention discloses a backlight module and a display device. The backlight module comprises a bottom plate, a plurality of light emitting modules, a light diffusion layer, a first quantum dot layer and a second quantum dot layer; wherein, a plurality of light emitting modules are arranged on the bottom plate at intervals; the light diffusion layer is positioned above the light emitting surface of the light emitting module; the first quantum dot layer is positioned on the light emergent surface of the light diffusion layer; the second quantum dot layer is positioned above the interval area between the light emitting modules and is mutually staggered with the light diffusion layer in the direction parallel to the first quantum dot layer. In the invention, the area corresponding to the light-emitting module on the bottom plate is a bright area, and the light emitted by the light-emitting module is diffused through the light diffusion layer; meanwhile, the interval area between the light emitting modules on the bottom plate is a dark area, the light emitted by the light diffusion layer enables quantum dot particles in the second quantum dot layer to excite light, and finally the quantum dot particles in the first quantum dot layer excite light, so that the light emission of the whole light emitting film group is uniform and has no light-dark interval.
Description
Technical Field
The present invention relates to the field of display technologies, and in particular, to a backlight module and a display device.
Background
Currently, in a display device, mini LEDs (micro light emitting diodes) are used as backlight modules to provide a light source. Mini LEDs emit light in a direct type. The smaller the number of LED chips, the better in view of cost and part-making problems. So that there must be a large spacing area between the LED chips. The interval area has weaker light intensity due to no illuminant, and can present a dark area. Meanwhile, the front light intensity of the LED chip is strong and is in a bright area, so that the backlight module is bright and dark, and the light is not uniform, and the final display effect of the display panel is affected.
Disclosure of Invention
Based on the shortcomings in the prior art, the invention aims to provide a backlight module and a display device, which can enable the backlight module to emit light uniformly.
In order to achieve the above object, the present invention provides a backlight module, comprising:
A bottom plate;
The light-emitting modules are arranged on the bottom plate at intervals;
the light diffusion layer is positioned on the light emitting surface of the light emitting module;
The first quantum dot layer is positioned on the light emergent surface of the light diffusion layer;
the second quantum dot layer is positioned above the interval area between the light emitting modules and is mutually staggered with the light diffusion layer in the direction parallel to the first quantum dot layer.
Optionally, the backlight module further includes an adhesive layer, and the second quantum dot layer and the light diffusion layer are connected to the first quantum dot layer through the adhesive layer.
Optionally, the first quantum dot layer and the second quantum dot layer are formed by a first photosensitive adhesive layer, and the first photosensitive adhesive layer comprises photosensitive adhesive and quantum dot particles dissolved in the photosensitive adhesive.
Optionally, the first photosensitive adhesive layer includes a flat portion and a protruding portion, the height of the protruding portion is greater than the height of the flat portion, the flat portion is a first quantum dot layer, and the protruding portion is a second quantum dot layer.
Optionally, the light diffusion layer includes a second photosensitive paste layer including a photosensitive paste and light diffusion particles dissolved in the photosensitive paste.
Optionally, a second photosensitive adhesive layer is disposed in the region between the protrusions.
Optionally, the backlight module further includes a first light enhancement layer and a second light enhancement layer, where the first light enhancement layer is located on the light emitting surface of the first quantum dot layer, and the second light enhancement layer is located on the light emitting surface of the first light enhancement layer.
Optionally, the backlight module further includes an upper diffusion layer, and the upper diffusion layer is located above the light emitting surface of the second light enhancement layer.
Optionally, the backlight module further includes a brightness enhancing layer, and the brightness enhancing layer is located above the light emitting surface of the upper diffusion layer.
The invention also provides a display device which comprises a display panel and the backlight module, wherein the display panel is positioned on the light emitting surface of the backlight module.
Compared with the prior art, the invention has the beneficial effects that: the backlight module comprises a bottom plate, a plurality of light emitting modules, a light diffusion layer, a first quantum dot layer and a second quantum dot layer; wherein, a plurality of light emitting modules are arranged on the bottom plate at intervals; the light diffusion layer is positioned above the light emitting surface of the light emitting module; the first quantum dot layer is positioned on the light emergent surface of the light diffusion layer; the second quantum dot layer is positioned above the interval area between the light emitting modules and is mutually staggered with the light diffusion layer in the direction parallel to the first quantum dot layer. In the invention, the area corresponding to the light-emitting module on the bottom plate is a bright area, and the light emitted by the light-emitting module is diffused through the light diffusion layer; meanwhile, the interval area between the light emitting modules on the bottom plate is a dark area, the light emitted by the light diffusion layer enables quantum dot particles in the second quantum dot layer to excite light, and finally the quantum dot particles in the first quantum dot layer excite light, so that the whole light emitting film group emits light uniformly, no light and dark are alternate, and the display effect of the display device is improved.
Drawings
In order to more clearly illustrate the embodiments or the technical solutions in the prior art, the following description will briefly introduce the drawings that are needed in the embodiments or the description of the prior art, it is obvious that the drawings in the following description are only some embodiments of the invention, and that other drawings can be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic diagram of a backlight module in the prior art;
FIG. 2 is a schematic diagram of a prior art backlight module;
FIG. 3 is a schematic diagram of a prior art backlight module;
FIG. 4 is a schematic diagram of a backlight module according to an embodiment of the invention;
FIG. 5 is a schematic diagram of the structure of a second quantum dot layer and a light diffusion layer according to an embodiment of the present invention;
FIG. 6 is a schematic diagram of the structure of a first quantum dot layer and a second quantum dot layer according to an embodiment of the present invention;
FIG. 7 is a schematic diagram of the structure of a light diffusion layer and a second quantum dot layer according to an embodiment of the present invention;
fig. 8 is a schematic structural diagram of a display device according to an embodiment of the invention.
Detailed Description
The following description of the embodiments refers to the accompanying drawings, which illustrate specific embodiments in which the invention may be practiced. In the description of the present invention, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically connected, electrically connected or can be communicated with each other; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. Meanwhile, the terms "first", "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated in the present invention. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more of the described features. In the description of the present invention, the meaning of "a plurality" is two or more, unless explicitly defined otherwise. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.
The Mini LED has the advantages of high contrast, high brightness and the like, and is actively developed by various manufacturers because of being capable of realizing Local Dimming. Unlike traditional backlight structure, mini LED adopts direct type light emitting structure, and no light guide plate and reflector plate structure are needed. Mini LEDs emit light in a direct type. In view of cost and the problem of spare parts, the smaller the number of the light emitting chips is, the better. Thus, a larger gap is necessarily present between the light emitting chips, as shown in fig. 1 and 2, and the gap presents a dark area due to the fact that no light emitting body exists, and the light intensity is weaker. Meanwhile, the light intensity of the front surface of the chip is strong, and the chip is a bright area. As shown in fig. 3, the actual display effect of the Mini LED surface light source has the problem of stars with alternate brightness and darkness.
The embodiment of the invention provides a backlight module to solve the above problems, as shown in fig. 4, the backlight module 100 includes a bottom plate 101, a plurality of light emitting modules 102, a light diffusion layer 103, a first quantum dot layer 104 and a second quantum dot layer 105; wherein, a plurality of light emitting modules 102 are arranged on the bottom plate 101 at intervals; the light diffusion layer 103 is located above the light emitting surface of the light emitting module 102; the first quantum dot layer 104 is located above the light emitting surface of the light diffusion layer 103; the second quantum dot layer 105 is located above the interval region between the light emitting modules 102 and is disposed to be staggered with the light diffusion layer 103 in a direction parallel to the first quantum dot layer 104.
In the prior art backlight module 100, a quantum dot film is disposed above the light emitting unit. Because the interval area between the light emitting units is not provided with no luminous body, the light intensity is weaker, and a dark area is displayed. Resulting in a phenomenon of light and shade interval when the conventional backlight module 100 emits light.
The backlight module 100 of the embodiment of the present invention adopts the structure of the above embodiment, the area corresponding to the light emitting module 102 on the bottom plate 101 is a bright area, and the light emitted by the light emitting module 102 is diffused by the light diffusion layer 103; meanwhile, the interval area between the light emitting modules 102 on the bottom plate 101 is a dark area, the light emitted by the light diffusion layer 103 enables quantum dot particles in the second quantum dot layer 105 to excite light, and finally the quantum dot particles in the first quantum dot layer 104 excite light, so that the whole light emitting film group emits light uniformly, no light and dark are alternated, and the display effect of the display device is improved.
In this embodiment, quantum Dots (QDs) are semiconductor nanocrystals with radii less than or close to the bohr radius, mostly three dimensional nanomaterials composed of ii-vi or iii-v elements. Due to quantum confinement effects, the transport of electrons and holes within it is limited, such that the continuous band structure becomes a separate energy level structure. When the sizes of the quantum dot particles are different, the quantum confinement degree of electrons and holes is different, and the discrete energy level structures are different. After being excited by external energy, quantum dots with different sizes emit light with different wavelengths, namely light with various colors. The quantum dot particles of the embodiment have the advantages that: by regulating the size of the quantum dot, the light-emitting wavelength range can be covered to infrared and whole visible light wave bands, the light-emitting wave band is narrow, and the color saturation is high; the quantum conversion efficiency of the quantum dot material is high; the material performance is stable; the preparation method is simple and various, can be prepared from the solution, and has rich resources.
In one embodiment, as shown in fig. 5, the backlight module 100 further includes an adhesive layer 106, and the second quantum dot layer 105 and the light diffusion layer 103 are connected to the first quantum dot layer 104 through the adhesive layer 106. This firmly adheres the second quantum dot layer 105, the light diffusion layer 103, and the first quantum dot layer 104 together. The material of the adhesive layer 106 may be transparent optical adhesive.
In one embodiment, as shown in fig. 6, the first quantum dot layer 104 and the second quantum dot layer 105 are formed by a first photoresist layer a, the first photoresist layer a including a photoresist and quantum dot particles dissolved in the photoresist. The photosensitive adhesive can be shadowless adhesive or ultraviolet curing adhesive. The photosensitive paste is cured by light irradiation to form a first quantum dot layer 104 and a second quantum dot layer 105.
In one embodiment, the first photosensitive adhesive layer a includes a flat portion A1 and a protruding portion A2, the height of the protruding portion A2 is greater than the height of the flat portion A1, the flat portion A1 is the first quantum dot layer 104, and the protruding portion A2 is the second quantum dot layer 105. Thus, the first quantum dot layer 104 and the second quantum dot layer 105 can be formed through the optical curing process, the manufacturing process is reduced, and the production efficiency is improved.
In one embodiment, as shown in fig. 7, the light diffusion layer 103 includes a second photosensitive adhesive layer B, and the second photosensitive adhesive layer B includes a photosensitive adhesive and light diffusion particles dissolved in the photosensitive adhesive. The light diffusion particles can diffuse light, so that the light emitted by the light emitting module 102 can be more uniformly dispersed.
In one embodiment, the second photosensitive adhesive layer B is disposed in the region between the protruding portions A2. Thus, the light diffusion layer 103 and the second quantum dot layer 105 are arranged below the first quantum dot layer 104 at intervals in a staggered manner, and the light transmitted by the first quantum dot layer 104 is more uniform, so that the phenomenon of light-dark interval is eliminated.
In an embodiment, the backlight module 100 further includes a first light enhancement layer 107 and a second light enhancement layer 108, where the first light enhancement layer 107 is located on the light emitting surface of the first quantum dot layer 104, and the second light enhancement layer 108 is located on the light emitting surface of the first light enhancement layer 107. The first light enhancement layer 107 and the second light enhancement layer 108 can collect light, so as to further enhance the brightness of the backlight module 100.
In one embodiment, the backlight module 100 further includes an upper diffusion layer 109, where the upper diffusion layer 109 is located above the light emitting surface of the second light enhancement layer 108. The light diffusing particles in the upper diffusion layer 109 may refract and reflect light to further diffuse the light uniformly.
In one embodiment, the backlight module 100 further includes a brightness enhancing layer 110, where the brightness enhancing layer 110 is located above the light emitting surface of the upper diffusion layer 109. The brightness enhancing layer 110 can enhance the brightness of the backlight module 100. In this embodiment, the brightness enhancing layer 110 may be a DBEF (dual brightness ENHANCEMENT FILM) reflective polarizing brightness enhancing film.
In one embodiment, the first quantum dot layer 104 and the second quantum dot layer 105 may be quantum dot films including cadmium free quantum dots a and spaced quantum dots B dispersed between the cadmium free quantum dots a. That is, the cadmium-free quantum dots A and the interval quantum dots B are uniformly dispersed in the quantum dot film. The cadmium-free quantum dot A is a cadmium-free quantum dot with a core-shell structure; the metal elements composing the interval quantum dot B material and the metal elements composing the shell layer material of the cadmium-free quantum dot A are positioned in the same group; the nonmetallic elements composing the interval quantum dot B material and the nonmetallic elements composing the shell material of the cadmium-free quantum dot A are positioned in the same group. It should be noted that, the metal element composing the interval quantum dot material and the metal element composing the shell layer material of the cadmium-free quantum dot may be the same metal element in the same group, or may be two different metal elements in the same group. The nonmetallic elements composing the interval quantum dot material and the nonmetallic elements composing the shell layer material of the cadmium-free quantum dot can be the same nonmetallic elements in the same group, and can also be two different nonmetallic elements in the same group.
Specifically, the material of the interval quantum dot and the shell material of the cadmium-free quantum dot are II-VI semiconductor materials. Further in a preferred embodiment, the spacer quantum dots are single-core quantum dots, because the spacer quantum dots of the core-shell mechanism can generate self-luminescence, and the core-shell structure can easily tie charges to cause loss, and the material of the spacer quantum dots and the shell material of the cadmium-free quantum dots are selected from one of ZnSe, znS, znTe, znSeS, znSeTe and ZnSTe. Further, the material for spacing the quantum dots and the shell material of the cadmium-free quantum dots are selected from one of ZnS, znSe and ZnSeS.
It should be noted that the material of the interval quantum dot and the shell material of the cadmium-free quantum dot may be the same semiconductor material in the group II-VI semiconductor material (i.e., the interval quantum dot and the shell of the cadmium-free quantum dot have the same material composition), or may be two different semiconductor materials in the group II-VI semiconductor material (i.e., the interval quantum dot and the shell of the cadmium-free quantum dot have similar material compositions). For example, when the shell layer of the cadmium-free quantum dot is ZnSe in the II-VI semiconductor material, the spacing quantum dot can be ZnSe in the II-VI semiconductor material, i.e. the spacing quantum dot is composed of the same material as the shell layer of the cadmium-free quantum dot; when the shell layer of the cadmium-free quantum dot is ZnSe in the II-VI semiconductor material, the interval quantum dot can also adopt ZnS or ZnSeS and the like in the II-VI semiconductor material, namely the interval quantum dot is composed of a material similar to the shell layer of the cadmium-free quantum dot.
In the quantum dot film of the embodiment, the distance between the cadmium-free quantum dots can be effectively increased by adding the interval quantum dots, so that the interaction between the cadmium-free quantum dots and the FRET (fluorescence energy resonance transfer) effect generated by the interaction between the cadmium-free quantum dots are effectively weakened, and the luminous efficiency of the quantum dot film is improved; the mode of adding other spacing materials to increase the mutual distance between the cadmium-free quantum dots is obviously different from that of adding other spacing materials, the spacing quantum dots adopt a structure which is the same as or similar to the cadmium-free quantum dot shell layer, so that the consistency and the continuity of the whole quantum dot film on energy level can be ensured, namely the spacing quantum dots can still provide effective energy level constraint for the cadmium-free quantum dots, the energy level constraint effect of the original cadmium-free quantum dot shell layer is expanded, and additional lattice mismatch is not introduced; the interval quantum dot with wide energy band gap can realize energy transfer to the cadmium-free luminous quantum dot, and fully utilizes charges injected into the quantum dot layer and excitons generated; in addition, the interval quantum dot with wide energy band gap, namely high-energy photon can realize energy transfer to the cadmium-free quantum dot, and fully utilizes charges injected into the quantum dot layer and generated excitons; finally, the interval quantum dots can effectively fill gaps when the film is formed, so that a smooth quantum dot film with good compactness is realized, the light of the backlight module 100 can be more uniform, and the phenomenon that the light of the backlight module 100 is bright and dark and staggered is eliminated.
In one embodiment, the light emitting module 102 may be a Mini LED, including light emitting chips, which are arrayed on the base plate 101.
In one embodiment, the backlight module 100 further includes a bottom plate pad 111 and a support frame 112, and the bottom plate 101 is connected to the support frame 112 through the bottom plate pad 111. The bottom plate 101, the light emitting module 102, the light diffusion layer 103, the second quantum dot layer 105, the first quantum dot layer 104, the first light enhancement layer 107, the second light enhancement layer 108, the upper diffusion layer 109 and the light enhancement layer 110 are all located in the support frame 112 and are protected by the support frame 112. Meanwhile, the display panel 200 is positioned above the support frame 112.
In one embodiment, the support frame 112 includes a bottom frame 1121 and side walls 1122, which may be a metal base, such as a ferrous bottom frame 1121; the side wall 1122 is a light shielding material to prevent light from being transmitted out of the side wall 1122.
The embodiment of the invention provides a display device, as shown in fig. 8, including a display panel 200 and the backlight module 100 provided in the above embodiment, where the display panel 200 is located on the light emitting surface of the backlight module 100.
The display panel 200 of the present embodiment includes a spacer 201, a lower polarizer 202, a thin film transistor layer 203, a color filter 204, and an upper polarizer 205. The pad 201 is disposed on the light emitting surface of the backlight module 100, the lower polarizer 202 is disposed on the pad 201, the thin film transistor layer 203 is disposed on the lower polarizer 202, the color filter 204 is disposed on the thin film transistor layer 203, and the upper polarizer 205 is disposed on the color filter 204.
The backlight module 100 of the present embodiment includes a bottom plate 101, a plurality of light emitting modules 102, a light diffusion layer 103, a first quantum dot layer 104 and a second quantum dot layer 105; wherein, a plurality of light emitting modules 102 are arranged on the bottom plate 101 at intervals; the light diffusion layer 103 is located above the light emitting surface of the light emitting module 102; the first quantum dot layer 104 is located above the light emitting surface of the light diffusion layer 103; the second quantum dot layer 105 is located above the interval region between the light emitting modules 102 and is disposed to be staggered with the light diffusion layer 103 in a direction parallel to the first quantum dot layer 104.
Further, the backlight module 100 further includes an adhesive layer 106, and the second quantum dot layer 105 and the light diffusion layer 103 are connected to the first quantum dot layer 104 through the adhesive layer 106. This firmly adheres the second quantum dot layer 105, the light diffusion layer 103, and the first quantum dot layer 104 together. The material of the adhesive layer 106 may be transparent optical adhesive.
The first quantum dot layer 104 and the second quantum dot layer 105 are formed by a first photoresist layer a, which includes a photoresist and quantum dot particles dissolved in the photoresist. The photosensitive adhesive can be shadowless adhesive or ultraviolet curing adhesive. The photosensitive paste is cured by light irradiation to form a first quantum dot layer 104 and a second quantum dot layer 105.
The first photosensitive adhesive layer a includes a flat portion A1 and a protruding portion A2, the height of the protruding portion A2 is greater than the height of the flat portion A1, the flat portion A1 is the first quantum dot layer 104, and the protruding portion A2 is the second quantum dot layer 105. Thus, the first quantum dot layer 104 and the second quantum dot layer 105 can be formed through the optical curing process, the manufacturing process is reduced, and the production efficiency is improved.
The light diffusion layer 103 includes a second photosensitive paste layer B including a photosensitive paste and light diffusion particles dissolved in the photosensitive paste. The light diffusion particles can diffuse light, so that the light emitted by the light emitting module 102 can be more uniformly dispersed.
The second photosensitive adhesive layer B is disposed in the region between the protruding portions A2. Thus, the light diffusion layer 103 and the second quantum dot layer 105 are arranged below the first quantum dot layer 104 at intervals in a staggered manner, and the light transmitted by the first quantum dot layer 104 is more uniform, so that the phenomenon of light-dark interval is eliminated.
The backlight module 100 further includes a first light enhancement layer 107 and a second light enhancement layer 108, where the first light enhancement layer 107 is located on the light emitting surface of the first quantum dot layer 104, and the second light enhancement layer 108 is located on the light emitting surface of the first light enhancement layer 107. The first light enhancement layer 107 and the second light enhancement layer 108 can collect light, so as to further enhance the brightness of the backlight module 100.
The backlight module 100 further includes an upper diffusion layer 109, where the upper diffusion layer 109 is located above the light emitting surface of the second light enhancement layer 108. The light diffusing particles in the upper diffusion layer 109 may refract and reflect light to further diffuse the light uniformly.
The backlight module 100 further includes a brightness enhancing layer 110, where the brightness enhancing layer 110 is located above the light emitting surface of the upper diffusion layer 109. The brightness enhancing layer 110 can enhance the brightness of the backlight module 100. In this embodiment, the brightness enhancing layer 110 may be DBEF.
In the backlight module 100 of the embodiment of the invention, the area corresponding to the light emitting module 102 on the bottom plate 101 is a bright area, and the light emitted by the light emitting module 102 is diffused by the light diffusion layer 103; meanwhile, the interval area between the light emitting modules 102 on the bottom plate 101 is a dark area, the light emitted by the light diffusion layer 103 enables quantum dot particles in the second quantum dot layer 105 to excite light, and finally the quantum dot particles in the first quantum dot layer 104 excite light, so that the whole light emitting film group emits light uniformly, no light and dark are alternated, and the display effect of the display device is improved.
The present invention is not limited to the above-mentioned embodiments, and any changes or substitutions that can be easily understood by those skilled in the art within the technical scope of the present invention are intended to be included in the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the protection scope of the claims.
Claims (10)
1. A backlight module, comprising:
A bottom plate;
The light-emitting modules are arranged on the bottom plate at intervals;
the light diffusion layer is positioned on the light emitting surface of the light emitting module;
The first quantum dot layer is positioned on the light emergent surface of the light diffusion layer;
the second quantum dot layer is positioned above the interval area between the light emitting modules and is arranged in a staggered manner with the light diffusion layer in the direction parallel to the first quantum dot layer.
2. The backlight module according to claim 1, further comprising an adhesive layer, wherein the second quantum dot layer and the light diffusion layer are both connected to the first quantum dot layer through the adhesive layer.
3. The backlight module according to claim 1, wherein the first quantum dot layer and the second quantum dot layer are formed by a first photosensitive adhesive layer, the first photosensitive adhesive layer comprising a photosensitive adhesive and quantum dot particles dissolved in the photosensitive adhesive.
4. A backlight module according to claim 3, wherein the first photosensitive adhesive layer comprises a flat portion and a protruding portion, the protruding portion is greater than the flat portion, the flat portion is the first quantum dot layer, and the protruding portion is the second quantum dot layer.
5. A backlight module according to claim 4, wherein the light diffusion layer comprises a second photosensitive adhesive layer comprising a photosensitive adhesive and light diffusion particles dissolved in the photosensitive adhesive.
6. A backlight module according to claim 5, wherein the second photosensitive adhesive layer is disposed in a region between the protrusions.
7. A backlight module according to any one of claims 1 to 6, further comprising a first light enhancement layer and a second light enhancement layer, wherein the first light enhancement layer is located on the light emitting surface of the first quantum dot layer, and the second light enhancement layer is located on the light emitting surface of the first light enhancement layer.
8. A backlight module according to claim 7, further comprising an upper diffusion layer located above the light emitting surface of the second light enhancement layer.
9. A backlight module according to claim 8, further comprising a brightness enhancing layer positioned over the light exit surface of the upper diffusion layer.
10. A display device comprising a display panel and the backlight module of any one of claims 1 to 9, wherein the display panel is located above a light emitting surface of the backlight module.
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Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104914622A (en) * | 2015-06-10 | 2015-09-16 | 青岛海信电器股份有限公司 | Quantum dot light generating device and backlight module |
| CN104991374A (en) * | 2015-07-23 | 2015-10-21 | 京东方科技集团股份有限公司 | Display panel, manufacturing method thereof and display device |
| CN105065995A (en) * | 2015-08-12 | 2015-11-18 | 友达光电股份有限公司 | Direct type backlight module |
| CN105387384A (en) * | 2015-12-07 | 2016-03-09 | 友达光电股份有限公司 | Backlight module capable of improving color uniformity of backlight |
| CN106782352A (en) * | 2017-02-17 | 2017-05-31 | 深圳市华星光电技术有限公司 | Backlight based on Graphene, field color-sequence liquid crystal display device and its driving method |
| CN108983499A (en) * | 2018-09-19 | 2018-12-11 | 武汉华星光电技术有限公司 | Backlight module |
| CN109239976A (en) * | 2018-10-24 | 2019-01-18 | 深圳市万普拉斯科技有限公司 | Quantum dot backlight module and quantum dot liquid crystal display device |
| CN208421467U (en) * | 2018-06-08 | 2019-01-22 | 深圳市瑞丰光电子股份有限公司 | A kind of backlight module, display device and its electronic equipment |
| CN209167752U (en) * | 2018-12-05 | 2019-07-26 | 合肥惠科金扬科技有限公司 | Backlight and display device |
| CN211878386U (en) * | 2020-03-20 | 2020-11-06 | 南通创亿达新材料股份有限公司 | Optical film composite quantum dot plate and backlight module |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9620686B2 (en) * | 2015-01-28 | 2017-04-11 | Apple Inc. | Display light sources with quantum dots |
| CN110673391A (en) * | 2019-09-12 | 2020-01-10 | 武汉华星光电技术有限公司 | Backlight module |
-
2022
- 2022-03-22 CN CN202210287548.3A patent/CN114627750B/en active Active
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104914622A (en) * | 2015-06-10 | 2015-09-16 | 青岛海信电器股份有限公司 | Quantum dot light generating device and backlight module |
| CN104991374A (en) * | 2015-07-23 | 2015-10-21 | 京东方科技集团股份有限公司 | Display panel, manufacturing method thereof and display device |
| CN105065995A (en) * | 2015-08-12 | 2015-11-18 | 友达光电股份有限公司 | Direct type backlight module |
| CN105387384A (en) * | 2015-12-07 | 2016-03-09 | 友达光电股份有限公司 | Backlight module capable of improving color uniformity of backlight |
| CN106782352A (en) * | 2017-02-17 | 2017-05-31 | 深圳市华星光电技术有限公司 | Backlight based on Graphene, field color-sequence liquid crystal display device and its driving method |
| CN208421467U (en) * | 2018-06-08 | 2019-01-22 | 深圳市瑞丰光电子股份有限公司 | A kind of backlight module, display device and its electronic equipment |
| CN108983499A (en) * | 2018-09-19 | 2018-12-11 | 武汉华星光电技术有限公司 | Backlight module |
| CN109239976A (en) * | 2018-10-24 | 2019-01-18 | 深圳市万普拉斯科技有限公司 | Quantum dot backlight module and quantum dot liquid crystal display device |
| CN209167752U (en) * | 2018-12-05 | 2019-07-26 | 合肥惠科金扬科技有限公司 | Backlight and display device |
| CN211878386U (en) * | 2020-03-20 | 2020-11-06 | 南通创亿达新材料股份有限公司 | Optical film composite quantum dot plate and backlight module |
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