TWM509913U - Multi-function optical film and display system - Google Patents

Abstract

A multi-function optical film is provided, including: a functional layer having a first liquid crystal layer and a fluorescent layer; and a quarter-wave retardation layer on the functional layer. The multi-function optical film may further include a substrate under the functional layer. A display system is also provided, including: a display panel; a backlight module; and the above multi-function optical film, wherein the multi-function optical film is disposed between the display panel and the backlight module.

Description

Composite optical film and display system

The present invention relates to composite optical films, and more particularly to composite optical films having a liquid crystal layer and a photoluminescent layer.

The cholesteric liquid crystal (CLC) molecular stack has a certain regularity. Basically, the cholesteric liquid crystals in the same plane have substantially the same long-axis direction to form a molecular layer, and the axial direction of the next molecular layer is The axial direction of the upper layer produces an angle of angle, and finally the structure of the spiral array is formed in the direction of the vertical long axis. The special pattern of the helical arrangement of cholesteric liquid crystals can selectively reflect or penetrate light waves of a specific wavelength. More precisely, the cholesteric liquid crystal film can separate the light into two circularly polarized lights with opposite spins, wherein the incident light of the same spiral shape as the condensed liquid crystal molecules is reflected, and the incident light opposite to the spiral of the cholesteric liquid crystal stack is Penetrating cholesteric liquid crystal film.

In recent years, due to the booming development of portable electronic products and communication-related industries, the output of liquid crystal displays has grown significantly, which has driven the demand for liquid crystal display related components and optical film materials for displays. Generally, a liquid crystal display uses a backlight module as a light source to supply light with sufficient brightness and uniform distribution, so that the liquid crystal display can display images normally. However, the polarizing plate will be a light source. The method of polarization treatment is to absorb other unnecessary polarized light, that is, more than half of the incident light from the backlight module is absorbed by the polarizer and lost, so the requirement of high brightness and low energy consumption of the liquid crystal display cannot be satisfied.

In view of this, the existing cholesterol liquid crystal brightness enhancement film utilizes the liquid crystal spiral molecular structure to selectively reflect a specific polarized light, and combines the reflection mechanism of the backlight module to perform polarization conversion to achieve light recovery and reuse, thereby improving the luminous efficiency and allowing the display. Increased brightness, achieving the goal of reducing panel cost and saving energy and reducing carbon.

An embodiment of the present invention provides a composite optical film comprising: a functional layer comprising a first liquid crystal layer and a photoluminescent layer; and an optical compensation layer disposed on the functional layer.

Another embodiment of the present invention provides a composite optical film comprising: a substrate; a functional layer on the substrate comprising a first liquid crystal layer and a photoluminescent layer; and an optical compensation layer over the functional layer.

According to an embodiment of the present invention, in the above composite optical film, the first liquid crystal layer is on the photoluminescent layer, and the optical compensation layer is on the first liquid crystal layer. According to another embodiment of the present invention, the functional layer further includes a second liquid crystal layer underlying the photoluminescent layer.

According to an embodiment of the present invention, in the above composite optical film, the first liquid crystal layer is located under the photoluminescent layer, and the optical compensation layer is located above the photoluminescent layer.

According to an embodiment of the present invention, in the above composite optical film, the first liquid crystal layer and the photoluminescent layer are formed in the same film layer. According to another embodiment of the present invention, the composite optical film further includes: an adhesive layer containing the photoluminescent material on both sides of the functional layer.

A further embodiment of the present invention provides a display system comprising: a display panel; a backlight module; and the composite optical film as described above, wherein the composite optical film is located between the display panel and the backlight module.

100‧‧‧Cholesterol liquid crystal composite optical film

110‧‧‧Substrate

120‧‧‧ functional layer

122‧‧‧Photoluminescent layer

124‧‧‧Liquid layer

130‧‧‧Optical compensation layer

140‧‧‧Adhesive layer

200‧‧‧Cholesterol liquid crystal composite optical film

220‧‧‧ functional layer

222‧‧‧Photoluminescent layer

224‧‧‧First liquid crystal layer

226‧‧‧Second liquid crystal layer

240, 242‧‧‧ adhesive layer

300‧‧‧Cholesterol liquid crystal composite optical film

320‧‧‧ functional layer

322‧‧‧Photoluminescent layer

324‧‧‧Liquid layer

340‧‧‧Adhesive layer

400‧‧‧Cholesterol liquid crystal composite optical film

420‧‧‧ functional layer

440, 442‧‧ ‧ adhesive layer

500‧‧‧Cholesterol liquid crystal composite optical film

540, 542‧‧ ‧ adhesive layer

1 is a schematic cross-sectional view of a composite optical film according to an embodiment of the present invention, wherein a first liquid crystal layer is disposed on the photoluminescent layer.

2 is a schematic cross-sectional view of a composite optical film according to an embodiment of the present invention, wherein the second liquid crystal layer is located under the photoluminescent layer.

Figure 3 is a schematic cross-sectional view of a composite optical film according to an embodiment of the present invention, wherein the first liquid crystal layer is located below the photoluminescent layer.

4 is a schematic cross-sectional view of a composite optical film according to an embodiment of the present invention, wherein a first liquid crystal layer and a photoluminescent layer are formed in the same film layer.

Figure 5 is a schematic cross-sectional view of a composite optical film according to an embodiment of the present invention, the adhesive layer containing the photoluminescent material.

In order to make the objects, features, and advantages of the present invention more comprehensible, the preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. The embodiments of the present invention provide many suitable inventive concepts and can be widely implemented in various specific contexts. The specific embodiments discussed in the specification are merely illustrative of specific ways of making and using the present invention, and are not intended to limit the scope of the present invention.

It should be understood that the following disclosure of the specification provides many different embodiments or examples to implement various features of the present invention. The disclosure of the present specification is a specific example of the various components and their arrangement in order to simplify the description of the invention. However, these specific examples are not intended to limit the creation. For example, if the following disclosure of the present specification refers to forming a first feature on or above the second feature, that is, it includes an embodiment in which the first feature and the second feature are in direct contact; Embodiments are disclosed that have additional features formed between the first feature and the second feature without the first feature being in direct contact with the second feature.

Moreover, various features of the drawings are not shown Conversely, the dimensions of various features may be arbitrarily expanded or reduced for simplicity or convenience of labeling. In addition, the present description may use repeated reference symbols and/or words in different examples. These repeated symbols or words are used for the purpose of simplification and clarity, and are not intended to limit the various embodiments and/or the appearance structure. Relationship between.

The present invention provides a composite optical film, the functional layer comprising a cholesteric liquid crystal layer and a photoluminescent layer, the cholesteric liquid crystal layer being permeable to a specific The selective reflection of polarized light enhances the brightness, and the photoluminescent layer can perform color conversion to provide high color saturation light, especially in combination of the two, which can respectively add effects to enhance brightness and color saturation.

The composite optical film of the present invention will be described in detail below with reference to the accompanying drawings. Fig. 1 is a schematic view showing the structure of a cholesteric liquid crystal type composite optical film 100 according to an embodiment of the present invention. Referring to FIG. 1 , the cholesteric liquid crystal composite optical film 100 includes a substrate 110 , a functional layer 120 , and an optical compensation layer 130 . The functional layer 120 and the optical compensation layer 130 are sequentially stacked on the substrate 110 . In one embodiment, the functional layer 120 of the cholesteric liquid crystal composite optical film 100 includes a photoluminescent layer 122 and a liquid crystal layer 124, wherein the liquid crystal layer 124 is located above the photoluminescent layer 122 and the optical compensation layer 130 is Located above the liquid crystal layer 124, that is, the liquid crystal layer 124 is located between the photoluminescent layer 122 and the optical compensation layer 130.

Referring to FIG. 1 , in an embodiment, the cholesteric liquid crystal composite optical film 100 may further include an adhesive layer 140 between the functional layer 120 and the optical compensation layer 130 . In more detail, the adhesive layer 140 is located between the liquid crystal layer 124 and the optical compensation layer 130.

The cholesteric liquid crystal type composite optical film described in the present invention can be formed in any suitable manner. For example, each film layer may be formed on a substrate layer by layer to complete a cholesteric liquid crystal type composite optical film, or each film layer may be separately formed, and then each film layer is bonded to complete a cholesteric liquid crystal type composite optical film. . Hereinafter, a method of manufacturing the cholesteric liquid crystal composite optical film 100 of the present invention will be described by taking a process of forming each film layer layer by layer on the substrate.

Referring to FIG. 1 , first, a functional layer 120 is formed on the substrate 110 . For example, the photoluminescent layer 122 and the liquid crystal layer 124 are formed on the substrate 110 in sequence.

The substrate is used to provide support for each film layer, or it can be used as a protective layer to block air or moisture. In some embodiments, the substrate 110 can be a water oxygen barrier film. In some embodiments, the substrate 110 may include: glass, a release film, a polymer film, or a metal film or a functional film. For example, specific examples of the substrate 110 may include: glass, thin glass (thickness of about 10-40 μm), silicone release film, fluorine release film, cyclic olefin copolymer (COC), poly Polyimide, PI, polyethylene, polyethylene, polyethylene, polypropylene, polycarbonate, Polyethylene naphthalate (PEN), polyethersulfone (PES), copper film, or aluminum film.

The photoluminescent layer can be used to adjust the color or convert the color. It should be noted that the photoluminescent layer described in the present specification includes a photoluminescent layer formed of a fluorescent material or a quantum dot material, and also includes a composite light emitting material layer formed of a composite light emitting material, which are collectively referred to herein. "Photoluminescent layer". In some embodiments, photoluminescent layer 122 includes one or more photoluminescent materials and a host material. In some embodiments, the photoluminescent layer 122 can further comprise a light diffusing agent.

In some embodiments, the photoluminescent material can comprise: a phosphor or quantum dot. For example, specific examples of the phosphor powder may include: sulfide phosphor powder, such as: zinc sulfide (ZnS), cadmium sulfide (CdS), barium sulfide (SrS), calcium sulfide (CaS); Such as: calcium halophosphate; phosphate phosphor powder, such as: strontium phosphate (Sr ₂ P ₂ O ₇ ), barium phosphate (Ba ₂ P ₂ O ₇ ), calcium zinc phosphate [(Ca, Zn) ₃ (PO _{4 2} ]; phthalate phosphor powder, such as: zinc citrate (Zn ₂ SiO ₄ ), calcium silicate (CaSiO ₃ ); tungstate phosphor powder, such as: magnesium tungstate (MgWO ₄ ), tungstic acid Calcium (CaWO ₄ ); aluminate phosphor powder, such as: barium magnesium aluminate (BaMg ₂ Al ₁₆ O ₂₇ ), barium magnesium aluminate (CeMgAl ₁₁ O ₁₉ ), barium aluminate (Sr ₄ Al ₁₄ O ₂₅ ) Yttrium oxide (Y ₂ O ₃ ), or lanthanum oxide (La ₂ O ₃ ). Specific examples of the quantum dot material may include: silver indium sulfide (AgInS ₂ , AIS), copper indium sulfide (CuInS ₂ , CIS), cadmium selenide (CdSe), cadmium sulfide (CdS), cadmium telluride (CdTe), vulcanization Zinc (ZnS), zinc selenide (ZnSe), zinc telluride (ZnTe), zinc oxide (ZnO), mercury sulfide (HgS), mercury selenide (HgSe), mercury telluride (HgTe), cadmium sulfide cadmium ( CdSeS), cadmium selenide (CdSeTe), cadmium sulphide (CdSTe), zinc sulphide (ZnSeS), bismuth selenide (ZnSeTe), bismuth sulphide (ZnSTe), sulphur selenide (HgSeS) , Selenium Mercury (HgSeTe), HgSTe, CdZnS, CdZnSe, CdZnTe, CdHgS, Cadmium Selenide Mercury (CdHgSe), CdHgTe, CgHg, HgZnS, HgZnSe, HgZnTe, CdZnSeS, CdZnSeTe ), cadmium zinc cadmium (CdZnSTe), sulfur selenium cadmium mercury (CdHgSeS), selenium cadmium mercury (CdHgSeTe), cadmium cadmium mercury (CdHgSTe), sulphur selenium mercury (HgZnSeS), selenium bismuth mercury (HgZnSeTe), Thionine mercury zinc (HgZnSTe), gallium nitride (GaN), gallium phosphide (GaP), gallium arsenide (GaAs), gallium antimonide (GaSb), aluminum nitride (AlN), aluminum phosphide (AlP) ), aluminum arsenide (AlAs), aluminum telluride (AlSb), indium nitride (InN), indium phosphide (InP), indium arsenide (InAs), indium antimonide (InSb), gallium phosphide (GaN) ), GaN, GaN, GaN, GaPAs Aluminum arsenide (AlNSb), aluminum arsenide (AlPAs), aluminum phosphide (AlPSb), indium phosphide (InNP), indium arsenide (InNAs), indium arsenide (InNSb), phosphorus arsenic Indium (InPAs), Indium Bismuth Phosphide (InPSb), AlGaN, GaAlNPs, GaAlNSs, GaAlNS, GaAlPAs, Phosphorus Aluminum (GaAlPSb), GaN, GaInNP, GaInNAs, GaInNSb, GaInPAs, GaInPSb, Nitrogen Indium Aluminum (GaInPSb) InAlNP), InAlNAs, InAlNSb, InAlPAs, InAlPSb, SnS, SnSe, Sputum Tin (SnTe), lead sulfide (PbS), lead selenide (PbSe), lead telluride (PbTe), tin selenide (SnSeS), tin selenide (SnSeTe), tin antimony (SnSTe), sulfur Lead selenide (PbSeS), selenium Lead (PbSeTe), lead bismuth bismuth (PbSTe), lead sulphide (SnPbS), lead sinter (SnPbSe), lead bismuth (SnPbTe), sulphur selenide (SnPbSSe), selenium bismuth (SnPbSeTe) ), bismuth (Si), germanium (Ge), tantalum carbide (SiC), germanium (SiGe), manganese zinc selenide (ZnMnSe), arsenic gallium phosphide (GaAsP), aluminum gallium indium phosphide (AlGaInP), nitrogen Aluminum indium gallium (AlGaInN), or gallium phosphide: nitrogen (GaP: N).

In some embodiments, the matrix material can comprise a polymeric material. For example: a matrix material having a mono- or polyfunctional polymer or a condensation polymer, wherein the functional groups include: imine, silicon, amino, carboxylic acid, phosphoric acid Phosphate and the like. For example, the matrix material includes: polyethylene (PE), polypropylene (PP), polycarbonate (PC), polymethacrylates, such as: polymethyl methacrylate (PMMA), polyacrylates, such as polymethyl acrylate (PMA) or epoxy.

In some embodiments, the light diffusing agent may include: glass, polymethyl methacrylate (PMMA), polystyrene (PS), cerium oxide (SiO ₂ ), barium sulfate, calcium carbonate, borosilicate glass Or magnesium oxide.

Photoluminescent layer 122 can be formed by any suitable means. In some embodiments, the photoluminescent material and/or light diffusing agent can be incorporated into the matrix material and cured to form the photoluminescent layer 122 via coating or printing of the desired photoluminescent layer pattern. For example, the coating method that can be used to form the photoluminescent layer 122 includes: die coating, blade coating, roller coating, dip coating. Or spray coating; printing methods that can be used to form the photoluminescent layer 122 include: screen printing, flexography printing (FLEXO), gravure printing, letterpress printing (relief printing), or planographic printing; the curing method that can be used to form the photoluminescent layer 122 includes: UV curing or thermal curing.

The liquid crystal layer can perform polarization conversion on the incident light to achieve a brightening effect. In some embodiments, the liquid crystal layer 124 can include cholesteric liquid crystals. For example, the liquid crystal layer 124 is generally for all light in the visible range, and particularly includes a cholesteric liquid crystal having a polarizing effect in a wavelength range of 400 nm to 700 nm.

The liquid crystal layer 124 can be formed by any suitable means. In some embodiments, the liquid crystal layer 124 can be formed via coating. For example, the coating method that can be used to form the liquid crystal layer 124 includes: die coating, blade coating, roller coating, dip coating, or Spray coating; printing methods that can be used to form the photoluminescent layer 122 include: screen printing, flexography printing (FLEXO), gravure printing, relief printing (relief printing) Printing), or planographic printing.

Referring to FIG. 1 again, an adhesive layer 140 is formed on the functional layer 120. The adhesive layer is used to provide adhesion, for example, the adhesive layer 140 allows the subsequently formed optical compensation layer 130 to be applied over the functional layer 120. In some embodiments, the adhesive layer 140 can be a clear optical glue. For example, the adhesive layer 140 may include: an organic silicone rubber, an acrylic optical adhesive, an unsaturated polyester optical adhesive, or a polyurethane optical adhesive. Specifically, the adhesive layer 140 may be epoxy.

The adhesive layer 140 can be applied and cured directly on the functional layer 120, or the adhesive layer 140 can be applied and cured on other substrates, and then transferred to the functional layer 120 by means of a release transfer. In some embodiments, the coating method for forming the adhesive layer 140 may include: die coating, blade coating, roller coating, and dip coating. Or, spray coating; the curing method for forming the optical adhesive 300 may include: UV curing or heat curing.

Referring to FIG. 1 again, an optical compensation layer 130 is formed on the adhesive layer 140 to complete the cholesteric liquid crystal optical film 100. The optical compensation layer is used to provide phase delay and convert the polarization mode of the incident light. For example, the optical compensation layer 130 can convert the circularly polarized light separated by the liquid crystal layer 124 into linear polarization. The optical compensation layer 130 may be a quarter wave retardation film (QWF). In some embodiments, the optical compensation layer 130 can include a uniaxial compensation film whose optical axis is a single direction or a biaxial compensation film whose optical axis has a spatially continuously varying orientation. For example, the optical compensation layer 130 may include: an A-plate, an O-plate, a C-plate, a splay, or a hybrid compensation film. . In addition, a 1/4 phase retardation film having a broad band or a narrow band is also suitable for use in the present technology. application.

FIG. 2 is a schematic view showing the structure of a cholesteric liquid crystal type composite optical film 200 according to another embodiment of the present invention. Referring to FIG. 2 , the cholesteric liquid crystal composite optical film 200 includes a substrate 110 , a functional layer 220 , and an optical compensation layer 130 . The functional layer 220 and the optical compensation layer 130 are sequentially stacked on the substrate 110 . The cholesteric liquid crystal composite optical film 200 is different from the cholesteric liquid crystal composite optical film 100 in that the functional layer 220 of the cholesteric liquid crystal composite optical film 200 includes a photo luminescent layer 222, a first liquid crystal layer 224, and a Two liquid crystal layers 226, wherein the first liquid crystal layer 224 is located above the photoluminescent layer 222 and the second liquid crystal layer is located below the photoluminescent layer 222, that is, the photoluminescent layer 222 is located in the first liquid crystal layer 224. And between the second liquid crystal layer 226.

Referring to FIG. 2, in an embodiment, the cholesteric liquid crystal composite optical film 200 may further include an adhesive layer 240/242 located above and below the functional layer 220, respectively. In more detail, the adhesive layer 240 is located above the first liquid crystal layer 224 and the adhesive layer 242 is positioned below the second liquid crystal layer 226. In more detail, the adhesive layer 240 is located between the first liquid crystal layer 224 and the optical compensation layer 130, and the adhesive layer 242 is located between the second liquid crystal layer 226 and the substrate 110.

The substrate 110, the photoluminescent layer 222, the optical compensation layer 130, and the adhesive layer 240/242 in the cholesteric liquid crystal composite optical film 200 can be provided in a similar manner to the corresponding film layers in the cholesteric liquid crystal composite optical film 100 described above. Or manufacturing, and the details are not repeated here.

The first liquid crystal layer 224 and the second liquid crystal layer 226 of the cholesteric liquid crystal type composite optical film 200 may have the same or different cholesteric liquid crystals. Alternatively, the first liquid crystal layer 224 and the second liquid crystal layer 226 may have the same or different wavelength ranges. The cholesteric liquid crystal having a polarizing effect, for example, the first liquid crystal layer 224 may include cholesteric liquid crystal having a polarizing effect in a wavelength range of 400 nm to 500 nm, and the second liquid crystal layer 226 may include cholesterol having a polarizing effect in a wavelength range of 400 nm to 700 nm. Liquid crystal; for example, the polarizing effects of the first liquid crystal layer 224 and the second liquid crystal layer 226 generally cover a light wavelength range of 400 nm to 700 nm; for example, the first liquid crystal layer 224 may include a polarizing effect on a wavelength range of 400 nm to 700 nm. The cholesteric liquid crystal, and the second liquid crystal layer 226 may include a polarizing effect on a wavelength range of 400 nm to 500 nm.

Likewise, in some embodiments, the first liquid crystal layer 224 and the second liquid crystal layer 226 can be formed via coating. For example, the coating method that can be used to form the first liquid crystal layer 224 and the second liquid crystal layer 226 includes: die coating, blade coating, roller coating, impregnation. Dip coating, or spray coating.

FIG. 3 is a schematic view showing the structure of a cholesteric liquid crystal composite optical film 300 according to still another embodiment of the present invention. Referring to FIG. 3 , the cholesteric liquid crystal composite optical film 300 includes a substrate 110 , a functional layer 320 , and an optical compensation layer 130 . The functional layer 320 and the optical compensation layer 130 are sequentially stacked on the substrate 110 . The cholesteric liquid crystal type composite optical film 300 is different from the cholesteric liquid crystal type composite optical film 100 in that the functional layer 320 of the cholesteric liquid crystal type composite optical film 300 includes a photo luminescent layer 322 and a liquid crystal layer 324 in which liquid crystal The layer 324 is located below the photoluminescent layer 322 and the optical compensation layer 130 is located above the photoluminescent layer 322, that is, the photoluminescent layer 322 is located between the liquid crystal layer 324 and the optical compensation layer 130.

Referring to FIG. 3 , in an embodiment, the cholesteric liquid crystal composite optical film 300 may further include an adhesive layer 340 under the functional layer 320 . In more detail, the adhesive layer 340 is located below the liquid crystal layer 324, or the adhesive layer 340 is located between the liquid crystal layer 324 and the substrate 110.

The substrate 110, the photoluminescent layer 322, the liquid crystal layer 324, the optical compensation layer 130, and the adhesive layer 340 in the cholesteric liquid crystal composite optical film 300 may each be similar to the corresponding film layer in the cholesteric liquid crystal composite optical film 100. The manner is provided or manufactured, and the repeated description is not repeated here.

FIG. 4 is a schematic view showing the structure of a cholesteric liquid crystal type composite optical film 400 according to still another embodiment of the present invention. Referring to FIG. 4 , the cholesteric liquid crystal composite optical film 400 includes a substrate 110 , a functional layer 420 , and an optical compensation layer 130 . The functional layer 420 and the optical compensation layer 130 are sequentially stacked on the substrate 110 . The cholesteric liquid crystal composite optical film 400 is different from the cholesteric liquid crystal composite optical film 100 in that the photoluminescent layer and the liquid crystal layer of the cholesteric liquid crystal composite optical film 400 are formed in the same film layer, that is, cholesterol. The photoluminescent layer and the liquid crystal layer of the liquid crystal type composite optical film 400 are integrated and formed in a single film layer of the functional layer 420.

Referring to FIG. 4, in an embodiment, the cholesteric liquid crystal composite optical film 400 may further include an adhesive layer 440/442 located above and below the functional layer 420, respectively. In more detail, the adhesive layer 440 is located between the functional layer 420 and the optical compensation layer 130, and the adhesive layer 442 is located between the functional layer and the substrate 110.

The substrate 110, the optical compensation layer 130, and the adhesive layer 440/442 in the cholesteric liquid crystal composite optical film 400 may be provided or manufactured in a similar manner to the corresponding film layers in the cholesteric liquid crystal composite optical film 100, and Heavy Repeat the details.

The functional layer 420 of the cholesteric liquid crystal type composite optical film 400 may include one or more photoluminescent materials, a liquid crystal material, and a matrix material. One or more of the photoluminescent materials and the matrix material used to form the functional layer 420 may be substantially the same as the photoluminescent layer 122, and the description thereof will not be repeated here, but it should be noted that the light diffusing agent is not included in the functional layer 420. The liquid crystal material used to form the functional layer 420 can be substantially the same as the liquid crystal layer 124, and details are not described herein again.

In some embodiments, the functional layer 420 can be formed via coating after mixing one or more of the photoluminescent material, the liquid crystal material, and the host material. For example, the coating method that can be used to form the functional layer 420 includes: die coating, blade coating, roller coating, dip coating, or Spray coating.

FIG. 5 is a schematic view showing the structure of a cholesteric liquid crystal type composite optical film 500 according to still another embodiment of the present invention. The cholesteric liquid crystal composite optical film 500 is substantially equivalent to the cholesteric liquid crystal composite optical film 400, wherein the adhesive layers 540/542 each further comprise one or more photoluminescent materials, and the one or more photoluminescent materials include: Fluorescent powder or quantum dots, and specific examples of phosphor powder or quantum dots can be substantially the same as photoluminescent layer 122, please refer to the foregoing.

As mentioned above, the composite optical film provided by the present invention can enhance the brightness of the cholesteric liquid crystal layer and enhance the color saturation through the photoluminescent layer, and in combination, the brightness and color saturation can be respectively improved. The effect produces complementary effects. In one embodiment, the cholesterol liquid crystal composite optical film provided by the present invention can simultaneously increase the brightness to 1.1 to 1.5 times and improve compared to an optical film having only a cholesteric liquid crystal brightness enhancement film or only a photoluminescence layer. Color saturation to 80-100%.

According to other embodiments of the present invention, the present invention also provides a display system comprising: a display panel; a backlight module; and the cholesteric liquid crystal optical film of the present invention is disposed between the display panel and the backlight module.

According to some embodiments of the application, the cholesteric liquid crystal optical film (eg, cholesteric liquid crystal optical film 100/200/300/400/500) described in the present application may be directly used in a display system, or, as described in the present application The cholesteric liquid crystal optical film can be applied to a display system after the substrate is removed. That is, the cholesteric liquid crystal optical film described in the present invention may be disposed between the display panel and the backlight module in a form including or not including a substrate.

It should be understood that the present invention is not limited by the scope of the present invention, and is not intended to limit the scope of the present invention. Make some changes and refinements, so the scope of protection of this creation is subject to the definition of the patent application scope attached.

100‧‧‧Cholesterol liquid crystal composite optical film

110‧‧‧Substrate

120‧‧‧ functional layer

122‧‧‧Photoluminescent layer

124‧‧‧Liquid layer

130‧‧‧Optical compensation layer

140‧‧‧Adhesive layer

Claims (28)

A composite optical film comprising: a functional layer comprising a first liquid crystal layer and a photoluminescent layer; and an optical compensation layer over the functional layer. The composite optical film of claim 1, further comprising: an adhesive layer between the functional layer and the optical compensation layer or below the functional layer. The composite optical film of claim 1, wherein the first liquid crystal layer is on the photoluminescent layer, and the optical compensation layer is on the first liquid crystal layer. The composite optical film of claim 3, further comprising: an adhesive layer between the first liquid crystal layer and the optical compensation layer. The composite optical film of claim 3, wherein the functional layer further comprises a second liquid crystal layer under the photoluminescent layer. The composite optical film of claim 5, further comprising: a two-layer adhesive layer between the first liquid crystal layer and the optical compensation layer and below the second liquid crystal layer. The composite optical film of claim 1, wherein the first liquid crystal layer is under the photoluminescent layer, and the optical compensation layer is above the photoluminescent layer. The composite optical film of claim 7, further comprising: an adhesive layer under the first liquid crystal layer. The composite optical film of claim 1, wherein the first liquid crystal layer and the photoluminescent layer are formed in the same film layer. The composite optical film of claim 9, further comprising: a two-layer adhesive layer located above and below the functional layer. The composite optical film of claim 10, wherein the adhesive layers each comprise one or more photoluminescent materials, and the one or more photoluminescent materials comprise: phosphor powder or quantum dots. The composite optical film according to any one of claims 3, 5, wherein the photoluminescent layer comprises a light diffusing agent, and the light diffusing agent comprises: glass, polymethyl methacrylate (PMMA), polystyrene (PS), cerium oxide (SiO2), barium sulfate, calcium carbonate, borosilicate glass, or magnesium oxide. The composite optical film of any one of claims 2, 4, 6, 8, or 10, wherein the adhesive layer is a transparent optical adhesive, and the transparent optical adhesive comprises: an organic silicone rubber, acrylic Optical adhesive, unsaturated polyester optical adhesive, or polyurethane optical adhesive. A display system comprising: a display panel; a backlight module; and the composite optical film according to any one of claims 1-11, wherein the composite optical film is located on the display panel Between the backlight modules. A composite optical film comprising: a substrate; a functional layer on the substrate, comprising a first liquid crystal layer and a photoluminescent layer; An optical compensation layer is located above the functional layer. The composite optical film of claim 15, further comprising: an adhesive layer between the functional layer and the optical compensation layer or between the functional layer and the substrate. The composite optical film of claim 15, wherein the first liquid crystal layer is on the photoluminescent layer, and the optical compensation layer is on the first liquid crystal layer. The composite optical film of claim 17, further comprising: an adhesive layer between the first liquid crystal layer and the optical compensation layer. The composite optical film of claim 17, wherein the functional layer further comprises a second liquid crystal layer underlying the photoluminescent layer. The composite optical film of claim 19, further comprising: a two-layer adhesive layer between the first liquid crystal layer and the optical compensation layer and between the second liquid crystal layer and the substrate. The composite optical film of claim 15, wherein the first liquid crystal layer is under the photoluminescent layer, and the optical compensation layer is above the photoluminescent layer. The composite optical film of claim 21, further comprising: an adhesive layer between the first liquid crystal layer and the substrate. The composite optical film of claim 15, wherein the composite optical film The first liquid crystal layer and the photoluminescent layer are formed in the same film layer. The composite optical film of claim 23, further comprising: a two-layer adhesive layer, respectively located above and below the functional layer. The composite optical film of claim 24, wherein the adhesive layers each comprise one or more photoluminescent materials, and the one or more photoluminescent materials comprise: phosphor powder or quantum dots. The composite optical film according to any one of claims 17, wherein the photoluminescent layer comprises a light diffusing agent, and the light diffusing agent comprises: glass, polymethyl methacrylate. (PMMA), polystyrene (PS), cerium oxide (SiO2), barium sulfate, calcium carbonate, borosilicate glass or magnesium oxide. The composite optical film of any one of claims 16, 18, 20, 22, and 24, wherein the adhesive layer is a transparent optical adhesive, and the transparent optical adhesive comprises: an organic silicone rubber, acrylic Optical adhesive, unsaturated polyester optical adhesive, or polyurethane optical adhesive. A display system comprising: a display panel; a backlight module; and the composite optical film according to any one of claims 15-25, wherein the composite optical film is located on the display panel Between the backlight modules.