阅读说明：本技术 量子点偏光片及显示设备 (Quantum dot polaroid and display device ) 是由 马卜 徐晓波 李敬群 王允军 于 2019-03-08 设计创作，主要内容包括：本发明公开了一种量子点偏光片和显示设备,量子点偏光片包括：偏光片；胶层,包括第一量子点和胶水,第一量子点分散在胶水中；具有量子点层的量子点膜,量子点层包括第二量子点和高分子材料,第二量子点分散在高分子材料中；胶层的两侧分别连接偏光片和量子点膜；其中,第一量子点和第二量子点的发射波长不同。该量子点偏光片将不同发射波长的第一量子点和第二量子点分别设置在胶层和量子点膜中,提升显示设备的亮度。显示设备包括该量子点偏光片。(The invention discloses a quantum dot polaroid and display equipment, wherein the quantum dot polaroid comprises: a polarizer; the glue layer comprises first quantum dots and glue, and the first quantum dots are dispersed in the glue; a quantum dot film having a quantum dot layer, the quantum dot layer including second quantum dots and a polymer material, the second quantum dots being dispersed in the polymer material; both sides of the adhesive layer are respectively connected with the polaroid and the quantum dot film; wherein the emission wavelengths of the first quantum dot and the second quantum dot are different. The quantum dot polaroid is characterized in that the first quantum dot and the second quantum dot with different emission wavelengths are respectively arranged in the glue layer and the quantum dot film, so that the brightness of the display equipment is improved. The display device comprises the quantum dot polarizer.)

1. A quantum dot polarizer, comprising:

a polarizer;

the glue layer comprises first quantum dots and glue, and the first quantum dots are dispersed in the glue;

a quantum dot film having a quantum dot layer, the quantum dot layer including second quantum dots and a polymer material, the second quantum dots being dispersed in the polymer material;

the two sides of the adhesive layer are respectively connected with the polaroid and the quantum dot film; wherein the content of the first and second substances,

the emission wavelengths of the first quantum dot and the second quantum dot are different.

2. The quantum dot polarizer of claim 1, wherein the adhesive layer has a thickness of 5 to 50 micrometers, and the quantum dot film has a thickness of 5 to 150 micrometers;

preferably, the ratio of the thickness of the glue layer to the thickness of the quantum dot film is 1: 1 to 3.

3. The quantum dot polarizer of claim 1, wherein the glue is selected from one or more of silicone rubber, acrylic resin, polymethacrylic resin, epoxy acrylate, urethane acrylate, polyether acrylate, and polyester acrylate.

4. The quantum dot polarizer of claim 3, wherein the ligand of the first quantum dot is selected from at least one of organic phosphines, organic acids, organic amines, or alkyl thiols.

5. The quantum dot polarizer of claim 1, wherein the mass fraction of the first quantum dots in the glue layer is 0.01 wt% to 10 wt%, and the mass fraction of the second quantum dots in the quantum dot layer is 0.01 wt% to 10 wt%;

preferably, in the quantum dot polarizer, a ratio of a total mass of the first quantum dots to a total mass of the second quantum dots is 2 to 4: 1.

6. the quantum dot polarizer of claim 1, wherein the polymer material comprises a crystalline region in which polymer chains are regularly arranged and an amorphous region in which polymer chains are randomly arranged, and the crystalline region is dispersed with quantum dots.

7. The quantum dot polarizer of claim 6, wherein the polymer material is selected from the group consisting of polyolefin polymers, polyester acid ester polymers, polyamide polymers, polyimide polymers, and combinations thereof.

8. The quantum dot polarizer of claim 6 or 7, wherein the crystallinity of the polymer material is 25% to 40%;

preferably, the crystallinity of the polymer material is 30% to 35%.

9. A quantum dot polarizer according to claim 1, wherein the quantum dot film comprises a plurality of layered structures, at least one of which is a quantum dot layer;

preferably, the quantum dot film comprises an odd number of layered structures.

10. A display device, comprising: a backlight module to emit a backlight;

a liquid crystal cell;

the quantum dot polaroid is arranged between the backlight module and the liquid crystal box; wherein the content of the first and second substances,

the quantum dot polaroid comprises a polaroid, an adhesive layer and a quantum dot film;

the glue layer comprises first quantum dots and glue, and the first quantum dots are dispersed in the glue;

the quantum dot film comprises a quantum dot layer, wherein the quantum dot layer comprises second quantum dots and a high polymer material, and the second quantum dots are dispersed in the high polymer material;

the two sides of the adhesive layer are respectively connected with the polaroid and the quantum dot film; wherein the content of the first and second substances,

the emission wavelengths of the first quantum dot and the second quantum dot are different.

Technical Field

The application relates to a quantum dot polaroid and display equipment.

Background

Quantum dots have excellent optical properties, and are now widely used in the fields of display, illumination, and the like. The existing quantum dot display equipment is mainly provided with a quantum dot film layer in a backlight module, so that the optical performance of the display equipment is improved.

However, in the conventional quantum dot film, quantum dots with different emission wavelengths are mixed and dispersed in the same film layer, and the quantum dots between the different emission wavelengths undergo a self-absorption phenomenon, so that the emission efficiency of the quantum dot film is reduced, thereby adversely affecting the luminance of the display device. And, the quantum dot film sets up in backlight unit, and the light that the quantum dot launches need pass through more optical layer, and this partial light loss is comparatively serious, further causes adverse effect to display device's luminance.

Disclosure of Invention

To above-mentioned technical problem, the application provides a quantum dot polaroid, when using it at reality equipment, has higher luminance than current quantum dot display device. The present application also provides a display device including the quantum dot polarizer.

In one aspect, a quantum dot polarizer is disclosed, comprising: a polarizer; the glue layer comprises first quantum dots and glue, and the first quantum dots are dispersed in the glue; a quantum dot film having a quantum dot layer, the quantum dot layer including second quantum dots and a polymer material, the second quantum dots being dispersed in the polymer material; both sides of the adhesive layer are respectively connected with the polaroid and the quantum dot film; wherein the emission wavelengths of the first quantum dot and the second quantum dot are different.

This quantum dot polaroid sets up the first quantum dot and the second quantum dot of different emission wavelength respectively in glue film and quantum dot membrane to reduce the quantum dot of different emission wavelength and mix and produce the phenomenon of self-absorption, therefore solved the problem that quantum dot membrane luminous efficacy is low, thereby promote display device's luminance. And, combine quantum dot membrane and polaroid, the optical layer in backlight unit need not be passed through again to the light that the quantum dot layer produced to reduce the loss of light in this part, further promoted the utilization ratio of light, promoted the luminance of display device and had good help.

In one embodiment, the thickness of the glue layer is 5 to 50 micrometers, and the thickness of the quantum dot film is 5 to 150 micrometers.

The inventor finds that, in the quantum dot polarizer, the thicknesses of the adhesive layer and the quantum dot film are set within the above ranges, which is more beneficial to improving the brightness of the display device including the quantum dot polarizer. The quantum dot content is not reduced due to the fact that the thickness of the quantum dot and the thickness of the display device are too thin, and therefore the brightness of the display device is difficult to improve. And the light emitted by the quantum dots is difficult to emit due to the over-thick thickness of the adhesive layer and the quantum dot film, so that the luminous efficiency of the adhesive layer and the quantum dot film is low.

Preferably, the ratio of the thickness of the glue layer to the thickness of the quantum dot film is 1: 1 to 3.

The inventor finds that when the thickness ratio of the first quantum dot and the second quantum dot is within the range, the light emitting of the first quantum dot and the light emitting of the second quantum dot are more favorable, and therefore the improvement of the light emitting efficiency of the quantum dot polarizer is favorably realized.

In one embodiment, the glue is made of one or more materials selected from silicone rubber, acrylic resin, polymethacrylic resin, epoxy acrylate, urethane acrylate, polyether acrylate and polyester acrylate.

In one embodiment, the ligand of the first quantum dot is selected from at least one of organic phosphines or organic acids or organic amines or alkyl thiols.

After the ligand of the first quantum dot is the ligand of the type, the dispersibility of the first quantum dot in glue is facilitated, and therefore the light extraction efficiency of the glue layer is not adversely affected due to the agglomeration of the quantum dots.

Specifically, the organophosphine ligand may be Trioctylphosphine (TOP), Tributylphosphine (TBP), Trioctylphosphine oxide (TOPO), or octadecylphosphinic acid (ODPA). The organic acid ligand may be Oleic Acid (OA), Stearic acid (Stearic acid), palmitic acid (palmitic acid), myristic acid (myristic acid). The organic amine ligand may be Octadecylamine (ODA), Trioctylamine (TOA), 9-Octadecylamine (Oleylamine, OAm). The alkyl thiol ligand may be octadecanethiol or octanethiol.

In one embodiment, the mass fraction of the first quantum dots in the glue layer is 0.01 wt% to 5 wt%, and the mass fraction of the second quantum dots in the quantum dot layer is 0.01 wt% to 5 wt%.

Preferably, in the quantum dot polarizer, the ratio of the total mass of the first quantum dots to the total mass of the second quantum dots is 2 to 4: 1.

in one embodiment, the polymer material comprises a crystalline region and an amorphous region, wherein the polymer chains are regularly arranged in the crystalline region, the polymer chains are randomly arranged in the amorphous region, and the quantum dots are dispersed in the crystalline region.

According to different arrangement rules of the polymer chains, the polymer material in the crystal region can form corresponding forms, such as single crystals, spherulites, dendrites, fiber crystals, clusters, columnar crystals, extended chain crystals, and the like. That is, in the crystal region, the quantum dots are dispersed among the polymer chains forming the form of single crystals, spherulites, dendrites, fiber crystals, clusters, columnar crystals, or extended chain crystals.

The quantum dots are dispersed among the regularly arranged polymer chains, and the regularly arranged polymer chains have a protection effect on the quantum dots dispersed among the regularly arranged polymer chains, so that the adverse effects of external water, oxygen and the like on the quantum dots are reduced. Therefore, the quantum dots in the quantum dot film are not easily damaged by water, oxygen and the like, so that the quantum dot film has good stability in the environment including water, oxygen and the like. Therefore, the stability of the quantum dot polaroid is improved, and the light emitting efficiency of the quantum dot polaroid has higher stability.

In one embodiment, the polymer material is selected from polyolefin polymers, polyester polymers, polyamide polymers, polyimide polymers, or combinations thereof.

Specifically, the polymer may be polyethylene, polyvinylidene fluoride, polyvinyl butyral, polyvinyl alcohol, polystyrene, polypropylene, polymethyl acrylate, polymethyl methacrylate, polydecylene formamide, polyhexamethylene sebacamide, polyethylene terephthalate glycol-modified polyethylene terephthalate, polyethylene naphthalate, polycarbonate, cellulose acetate butyrate, carnauba wax, polymethylphenyl silicone, polydimethylsiloxane, or the like.

In one embodiment, the crystallinity of the polymer material is 25% to 40%; preferably, the crystallinity of the polymer material is 30% to 35%.

The inventor finds that the crystallinity of the high molecular material plays a crucial role in the toughness of the quantum dot film; and the crystallinity is a parameter of the regular arrangement degree of the polymer chains, and plays an important role in preventing the quantum dots from being adversely affected by water, oxygen and the like. When the crystallinity of the high polymer material is in the range, the toughness of the quantum dot film adapts to the softness of the polaroid, so that the quantum dot film and the polaroid are more similar in mechanical property, and the combination is more suitable. And when the crystallinity of the polymer material is in the range, the protection of the quantum dots by the polymer chains in the polymer material is in a better balanced state, so that the stability of the quantum dot polarizer is in a better level.

In one embodiment, the quantum dot film comprises a plurality of layered structures, wherein at least one layer is a quantum dot layer; preferably, the quantum dot film comprises an odd number of layered structures.

In another aspect, a display apparatus is disclosed, comprising: a backlight module to emit a backlight; the liquid crystal box quantum dot polaroid is arranged between the backlight module and the liquid crystal box; the quantum dot polaroid comprises a polaroid, an adhesive layer and a quantum dot film; the glue layer comprises first quantum dots and glue, and the first quantum dots are dispersed in the glue; the quantum dot film comprises a quantum dot layer, the quantum dot layer comprises second quantum dots and a high polymer material, and the second quantum dots are dispersed in the high polymer material; both sides of the adhesive layer are respectively connected with the polaroid and the quantum dot film; wherein the emission wavelengths of the first quantum dot and the second quantum dot are different.

Drawings

FIG. 1 is a schematic structural diagram of a quantum dot polarizer in an embodiment of the present application;

fig. 2 is a schematic structural diagram of a display device in an embodiment of the present application.

In the drawings like parts are provided with the same reference numerals. The figures show embodiments of the application only schematically.

Detailed Description

The technical solutions in the examples of the present application will be described in detail below with reference to the embodiments of the present application. It should be noted that the described embodiments are only some embodiments of the present application, and not all embodiments.

Quantum dot polarizer