TWM329794U - Backlight module - Google Patents

Abstract

A backlight module is provided. The module comprises a housing, which has an opening and defines a chamber; an ultraviolet light source deposed into the chamber; a wavelength converting structure deposed on the opening, wherein the wavelength converting structure has a light transmitting substrate and a wavelength converting coating; and a fixing component, wherein the fixing component independently or in combination with the housing fix the shape of the wavelength converting structure so that the wavelength converting structure has a substantially flat surface.

Description

M329794 VIII. New Description: [New Technology Field] This creation is about a wavelength conversion structure, especially for a UV light that can be used to convert ultraviolet light, especially wavelengths of not more than 280 nm (ie 1^^) into visible light. The structure of the wavelength conversion coating 'The coating can be used in combination with a UVc source in the presence of air to convert the UVc wavelength to the visible wavelength. The wavelength conversion structure is fabricated in a step of "hip", which makes it easy to provide a large area of planar light source. This creation is also related to the application of the wavelength conversion structure to the light-emitting module and the backlight module. 1 [Prior Art] The planar light source with large illumination area is the development trend of the current light source. Especially the planar light source with large illumination area is more important for the backlight module of the large panel liquid crystal display. In the conventional light source, the wavelength of visible light is provided by energy/wavelength conversion, including cold cathode fluorescent lamp (CCFL), external electrode fluorescent lamp (EEFL), and luminescent diode. Light emitting diode (LED), carbon I nanotube (CNT), Flat Fluorescent Lamp (FFL), and organic light emitting display (OLED). In the above methods for energy/wavelength conversion to provide visible light wavelength, the CCFL is coated with a layer of phosphor on the inner wall of the glass tube, and a small amount of inert gas and mercury vapor are sealed inside the fluorescent tube, and the mercury vapor is discharged at the electrode. During the process, ultraviolet light is generated by electron impact, and the ultraviolet light is converted into visible light by the phosphor on the wall of the lamp tube to provide visible light wavelength. CCFL has the advantages of mature production technology and lower cost compared with the previous technology. 5 VM^29794 is lower, but it is limited by the fact that the fluorescent coating needs to be placed in the same vacuum lamp as the light source. The limitation of large-area wavelength conversion. In addition, the existing CCFL has disadvantages such as low yield and high cost when attempting to lengthen the lamp to provide a large light-emitting area. ^

The biggest difference between EEFL and CCFL is that the electrode is placed outside the lamp tube, so the same converter can be used to drive multiple fluorescent tubes. Therefore, the converter has lower cost and higher energy utilization efficiency. However, EEFL still has application limitations. For example, when the Eefl lamp source is insufficient, if the lamp voltage is increased to increase the current and increase the output brightness, the converter volume will rise sharply and the heat dissipation effect will be poor. . In addition, like CCFL, EEFL also has the disadvantage of not providing a large light-emitting area. LED is a light-emitting element made of a semiconductor material, which is made of a m_v group of chemical elements (such as gallium phosphide (GaP), gallium arsenide (GaAs), etc.), and applies a current to the compound semiconductor through electrons and electricity. The combination of the holes is released in the form of light to achieve a luminous effect. LEDs have the advantages of small size, long life, low driving voltage, and fast reaction rate. However, LEDs still have problems of color mixing, high production cost, low uniformity, poor heat dissipation, and low power efficiency. The CNT system uses a high electric field to release electrons from the tip, and then uses high voltage to accelerate the impact on the phosphor plate to convert it into light wavelength energy. Although this technology has the advantages of power saving, no mercury and low temperature, the process is complicated, cost, and brightness. Poor stability and poor uniformity. In addition, the large-scale production technology of CNT is still in development. The FFL uses the ultraviolet light generated by the discharge of an inert gas to excite the color phosphor powder, and then converts the visible wavelength of light acceptable to the adult eye. Although FFL has the advantages of no mercury, long life and simplified optical design, at present, there are still some shortcomings such as difficult process, high cost, inefficiency and heat dissipation. • As for the OLED, an external bias is applied to drive the holes/electrons from each of the positive/negative poles, and then the electric field moves toward the electrons and recombines to release the wavelength energy of the light under the action of the electric field. Although OLED has the advantages of thin thickness, high reliability, wide operating temperature range, low power consumption, and low driving voltage, at present, there are still large-scale difficulties, high production costs, insufficient efficiency, and short service life. Disadvantages. It can be seen from the above description that in the conventional visible light source, if the non-production technology is not mature (such as LED, CNT, OLED, and FFL), there is a disadvantage that it cannot be enlarged due to the limitations of the innate production (such as CCFL and EEFL). Can not meet the industry's need to provide large-area wavelength conversion in a simple, low-cost way. This creation is aimed at the research and development of the above requirements, and it can be combined with existing technologies to provide a large-area wavelength conversion method through simple means. [New content] In the present disclosure, the term "UVc" refers to ultraviolet light having a wavelength of not more than 280 nm, such as light of 200 to 280 nm, especially light of 250 to 26 nm, especially 253·7 nm. Light. The term "uvb" means light having a wavelength of from 280 to 320 nm, and "UVA" means light having a wavelength of from 320 to 400 nm. By "Macromer" is meant a molecule having a molecular weight greater than 1 Å, comprising an Oligomer and a P〇lymer. The so-called "fluorescent body that can be excited by ultraviolet light (or UVc, uvA or uvB) means that it can absorb ultraviolet light (or UVc, UVa) when it is irradiated with ultraviolet light (or UVc, UVa, or uvB). * UVb) and emit visible light material. One object of the present invention is to provide a wavelength conversion structure comprising: M329794 a substrate; and a wavelength conversion coating on the substrate and comprising: (a) a phosphor powder that can be excited by UVc And (b) an anti-UVc adhesive, wherein the thickness of the wavelength conversion coating is 2 to 10 times the average particle diameter of the phosphor powder, and the content of the phosphor powder in the wavelength conversion coating is as follows: At least one condition: (i) the volume percentage of the phosphor powder in the wavelength conversion coating is from 30% to 85% (based on the total volume of the phosphor powder and the adhesive); and (ii) the phosphor powder The weight ratio to the adhesive is 1:1 to 20:1. The creation wavelength conversion structure can be combined with a UVc light source to provide a large area of visible light source. The visible light source can be used in a backlight module to provide a large-area display panel in a simple manner. Another object of the present invention is to provide a method for fabricating a wavelength conversion structure comprising: 'providing a substrate; applying a slurry to the surface of the substrate, which is placed in a reservoir and containing (a) - a phosphor powder that can be excited by UVc; (b) an anti-UVc adhesive; and (c) an organic solvent, wherein the weight ratio of the phosphor powder to the adhesive is 1:1 to 20:1; and drying the coated substrate. After referring to the embodiments described later, those skilled in the art of the present invention can easily understand the basic spirit of the creation and other creative purposes, and the technical means and preferred embodiments adopted by the present invention. kind. [Embodiment] In order to provide a planar light source with a large light-emitting area, the present author converts ultraviolet light into visible light by a phosphor, in particular, directly coating a slurry containing a phosphor powder on a planar substrate. A wavelength conversion structure is formed thereon. In this way, ultraviolet light, in particular the UVc " band, can be converted into visible light via the wavelength conversion structure. That is, the ultraviolet light is excited to emit a phosphor powder and generate visible light. This wavelength conversion structure enhances the uniformity of illumination and provides the desired illumination area as needed. As mentioned above, CCFL has the advantages of mature production technology and low cost. However, it is limited that the fluorescent coating needs to be placed in the same vacuum tube as the light source, so it is difficult to enlarge and it is difficult to provide a large-area wavelength conversion. In detail, the CCFL coats a phosphor slurry solution (a composition component composed of a combination of a phosphor powder, an organic substance, an inorganic substance, and a solvent) in a glass tube, and thereafter, in the composition. The organic component is sintered and removed to form a phosphor layer on the inner wall of the glass tube. The glass tube is then filled with mercury vapor, and after the reference, the glass tube is closed, and the mercury vapor is excited by the electrode to release UVc, which is converted into visible light by the phosphor layer on the glass wall. In the above conventional CCFL manufacturing method, the coating of the phosphor layer is performed in an upright manner, and the phosphor paste is first sucked to the upper end of the vertical tube by the siphon principle, and then applied to the lamp from top to bottom by gravity. The inner wall of the tube is then sintered to remove the organic components of the coating to form the desired phosphor layer. In the foregoing coating method, thickness unevenness is caused at the upper and lower ends of the lamp due to the difference in gravity. This unevenness is particularly serious in the case where the lamp tube size is high (i.e., a case where a long lamp is required). 9 M329794 In addition, the existing CCFL structure sinters the phosphor onto the glass tube wall, but it is still difficult to prevent ultraviolet light from leaking from the phosphor gap in the phosphor layer. Taking the existing liquid crystal display technology as an example, the ultraviolet light leakage of the CCFL affects the characteristics of the optical materials such as the diffusion plate and the brightness enhancement film, resulting in deterioration of the materials. Therefore, most materials are treated with an anti-UV coating to increase their service life. In response to the above problems, the creator attempts to directly apply the phosphor paste directly to the individual substrate instead of the inner wall of the glass tube, providing a visible light source in a manner that separates the tube from the phosphor layer, eliminating the thickness of the CCFL phosphor layer. One problem is to increase the uniformity of illumination and to provide the desired illumination area as needed. Moreover, it has been found through research that through the use of special solvents and adhesives, and the control of the content of the adhesive and the phosphor powder, the formed composition slurry can be formed on the substrate without a sintering process. A wavelength conversion coating that efficiently converts ultraviolet light into visible light. The slurry can be applied to the substrate by a relatively simple coating method (e.g., roll-to-roll coating method) to greatly enhance the mass productivity. Other coating methods are exemplified (but not limited thereto), and dip coating, comma coating, spraying coating, and spin coating (spin) may be employed. Coating), slot coating, curtain coating, gravure coating, or wire bar coating. In particular, it may be dried in any convenient manner as needed. By way of example (but not by way of limitation), the drying may be carried out in a natural manner, or by a forced volatilization of aeration and/or heating (e.g., by hot air). The combination of the treatment coating and the substrate can be a simple wavelength conversion coating combination that can be combined with existing backlights, light sources, solid state lighting (such as LEDs and OLEDs) without changing the existing structural design. , has its high applicability. M329794 In addition, the wavelength conversion coating structure is effective in eliminating the problem of conventional CCFL campsite powder degradation. Here, it is known that the light light generated by the CCFL during the discharge process causes the phosphor powder to absorb or emit a spectrum (color center, also known as "color center" or "color center"), resulting in a new absorption band. The brightness of the phosphor powder is reduced (the aforementioned phenomenon can be found in the description of U.S. Patent No. 6,402,987, the disclosure of which is incorporated herein by reference). Second, the mercury ions and electrons recombine at the wall of the tube and release 10.42 eV of energy, which destroys the crystal lattice of the phosphor powder and reduces the brightness. Furthermore, since sodium ions are usually present in the CCFL lamp, it combines with the electrons generated when the CCFL lamp is discharged to form sodium atoms. The sodium atoms will diffuse into the phosphor powder grains, resulting in a decrease in the performance of the phosphor powder. Therefore, when the wavelength conversion structure is applied to the light-emitting module, since the wavelength conversion coating is separated from the UVe light source, that is, the phosphor is separated from the UVc light source, thereby effectively eliminating the conventional ccfl phosphor powder and The aforementioned problems caused by the UVc light source being placed in the same lamp. Specifically, the present invention can provide a wavelength conversion structure, and its specific implementation can be illustrated as in FIG. 1A, wherein 〇, #, and ❿ respectively represent the phosphors of different colors. The wavelength conversion structure 1 〇 2 comprises a substrate 1 〇 21 and a wavelength conversion coating 1023. The coating 1023 is disposed on the substrate 1021 and comprises a UVe-excitable phosphor powder and an anti-UVc adhesive. Wherein, the thickness of the conversion coating 1〇23 is 2 to 10 times the average particle diameter of the phosphor powder, and the content of the phosphor powder in the wavelength conversion coating layer 1〇23 meets at least one of the following conditions: ') The volume percentage of the phosphor powder in the wavelength conversion coating is from 3% to 85% (based on the total volume of the phosphor powder and the adhesive); and the weight ratio of the phosphor powder to the adhesive is 1:1 to 2:1. 11 • M329794 can use any combination of sensible UVc-excited phosphor powder for wavelength conversion coatings. For example, but not limited to, the phosphor powder may be selected from the group consisting of: oxidized-doped yttrium, yttrium-doped yttrium-doped yttrium oxide, yttrium-doped yttrium-doped lock, and combinations thereof . A suitable product can also be purchased directly from the market as a phosphor powder for the wavelength conversion coating.

In the wavelength conversion coating, the adhesive used may bond the phosphor powder to provide a wavelength conversion layer, typically selected from macromolecular adhesives. However, in order to cope with the application of UVC and avoid the deterioration of the material caused by the excitation process, it is preferred to use an adhesive having UV-resistant properties in the wavelength conversion coating. Specifically, taking a UVc light source having a wavelength of 253.7 nm as an example, since the light energy is about 113 kcal/mol, in the case of not being limited by theory, the chemical structure of a repeating unit of a macromolecular adhesive is not included in the theoretical limit. A chemical bond containing at least one bond greater than 113 kcal/mol is sufficient to resist the energy of the UVc band and avoid degradation of its material during the excitation process. Here, since the bond energy of the fluorocarbon bond is 132 kcal/mol, if a UVc light source of 253.7 nm is used, the following fluorine-containing polymer can be used as a viscous agent: polytetrafluoroethylene (PTFE), Poly(vinylidene fluorde), PVDF, poly(vinylidene fluoride-hexafluoropropylene, PVDF-HFP), ethylene-tetrafluoroethylene copolymer Copolymer, ETFE), fluorinated ethylene propylene copolymer (FEP), perfluoroalkoxy (PFA), fluoro-rubber, fluoro-elastomer, amorphous Amorphous fluoropolymers, and combinations thereof. It is also possible to use the following 12 • M329794 矽 polymer: silicon rubber, p〇lysil〇xane and * combinations thereof. Other high-performance polymers such as PoWmide (PI), polyether 飒 (pl〇yetherSulW ' PES), can also be used as a face length conversion coating using 253.7 fine wavelength UV correction in the uVc band. Adhesive. The better ones use macromolecules containing _ as an adhesive. In addition, other inorganic or organic-inorganic hybrid compounds which have a bonding function or can serve as a matrix of a phosphor, such as an inorganic or sol-gel material such as silica dioxide, titanium dioxide, and dioxins (such as coffee reading) #等, It can be applied to the wavelength conversion coating in combination with (10) of 253.7 coffee wavelength. # The above-mentioned phosphor powder content in the wavelength conversion coating shall meet the following conditions: (1) 30% to 85% by volume (based on the total volume of the fluorescent * #, ^ body and the adhesive) and / or (7) _ phosphor powder and adhesive weight ratio is i to (10). Here, the lower the adhesive content, the weaker the phosphors of the phosphor layer provided and the adhesion between the phosphor and the substrate to which the phosphor layer is applied; in contrast, when the adhesive content is The higher the adhesion, the stronger the adhesion effect, but the higher the amount of adhesive exposure to UVc will be, the longer the use will be, the more the performance of the adhesive will be degraded, and the light-emitting structure will be lighted. Reduced efficiency. Therefore, in order to provide a suitable wavelength conversion coating, it is preferred that the wavelength conversion coating contains a phosphor powder content in a shape similar to a Shaqi-like structure (ie, an adhesive is applied to the coating layer). Covering the phosphor powder in a thin layer instead of a continuous phase): (1) 50 to 70% by volume of the phosphor and/or (2) the weight ratio of the phosphor powder to the adhesive is 2 · 5 : 1 to 1 〇 · t Λ • 1. More preferably, the weight ratio of the phosphor powder to the adhesive is from 3:1 to 6:1. The particle size distribution of the phosphor powder is preferably 13 M329794 m, more preferably 1 to 10 m, based on the luminous efficiency. In addition, a combination of two or more particle size distributions of phosphor powder can be used to increase stacking efficiency and enhance the ultraviolet light absorbing efficiency and visible light illuminating efficiency of the provided wavelength converting coating. Here, only one of the scales can be used. For example, a first phosphor particle powder combination having a particle size distribution interval of 10 to 10 μm and a second particle size distribution of 1 to 1000 nm can be used. In the wavelength conversion structure, when the thickness of the conversion coating is too high, the converted visible light will be blocked, and if the thickness of the coating is too thin, UVc leakage may occur due to incomplete UVc absorption, resulting in a wavelength conversion structure. Yellowing of polymer materials such as materials or adhesives. Therefore, in order to provide a suitable UVc conversion benefit and avoid yellowing, it is desirable to control the thickness of the wavelength conversion coating. Herein, it has been found that when the thickness of the conversion coating is 2 to 1 times the average particle diameter of the phosphor powder, a stack of multiple layers of phosphor powder can be present in the coating, which allows UVc to be in the coating. After multiple reflections and / or refraction, it effectively balances luminous efficiency and blocks UVc. More preferably, the thickness of the conversion coating is 3 to 5 times the average particle diameter of the phosphor powder. For example, when the average size of the phosphor powder is 3 to 4 μm, the thickness of the conversion coating layer is preferably 6 to 40 μm, more preferably 1 to 20 μm. The substrate of the wavelength converting structure can be a flexible film, especially a polymer material, to facilitate the conventional roll-to-roll application. The tractable substrate preferably has a light transmissive property, and more preferably has a high light transmittance. For example, but not limited to, the film layer provided by the material selected from the group below may be used as a substrate: polyethylene terephthalate (PET), triacetate (triacetyl) -cellulose, TAC), polyethylene naphthalate (p〇iy (ethylene 2,6-naphthalate), PEN), polyether sulfone (PES), poly(vinylidene fluorde), PVDF), acetonitrile-octane copolymer M3*29794 (poly(ethylene_co-octene), PE_PO), propylene-ethylene copolymer (poly(propylene-co-ethylene), ΡΡ·ΡΕ), miscellaneous polypropylene (atactic polypropylene, aPP), isotactic polypropylene (iPP), - functionalized polyolefin, and linear low-density polyethylene-g-succinyl dianhydride (linear low density polyethylene- G-maleic anhydride, LLDPE_g-MA), preferably optical grade PET and TAC. The transparent sheet can also be a substrate for the wavelength conversion structure. For example, but not limited to, it can be made of glass, quartz, poly(methyl methacrylate), PMMA, polystyrene (PS), poly ( A sheet provided by methyl methacrylate-co-styrene (MS) or polycarbonate (PC) is used as a substrate, or a woven fabric can be used (fabric As a substrate, the material is usually glass. Further, a composite layer composed of two or more layers of the above-mentioned film layers and/or sheets may be used as a substrate; here, a polymer pressure sensitive adhesive may be used to bond the layers. The wavelength conversion structure can be obtained by a method comprising the steps of: providing a substrate; coating a surface of the substrate with a slurry disposed in a reservoir and comprising: (a) - being permeable to UVc a phosphor powder; (b) an anti-UVc adhesive; and (c) an organic solvent, wherein the phosphor powder and the adhesive are both as defined above and the weight ratio of the two is 1:1 to 20:1; and drying the coated substrate. · 15 M329794 Any suitable organic solvent can be used as a carrier for the phosphor powder and the adhesive - (carrier). In general, based on the ease of continuous coating, the viscosity of the slurry is usually controlled in the range of lOcps to 1000 cps. In this case, a low-boiling organic solvent is preferably used to avoid the solvent being unable to be dried during the coating drying process. Rapid evaporation causes phosphor precipitation, which leads to problems such as color deviation. Suitable low boiling solvents include, but are not limited to, those selected from the group consisting of C3-C4 ketones, CVC4 alkanes substituted with one or more 'halo groups, C5-C7 alkanes, C5_C6 Naphthenes, CrC4 alkanols, C2-C4 ethers, ethyl acetate, benzene, toluene, acetonitrile, _tetrahydrofuran, petroleum ether, fluorinated solvents, and combinations thereof. Preferred are C3-C4 ketones, CrQ alkanes substituted with one or more halo groups, C5-C7 alkanes, C5-C6 naphthenes, acetonitrile, and combinations of the foregoing. Specific examples of suitable low-boiling organic solvents include, but are not limited to, acetone, methyl bromide, 1,2-dichloroethane bromide, dichlorohydrazine, chloroform, pentane bromide, n-hexanol, heptane, cyclopentane, Cyclohexane, methanol, ethanol, propanol, isopropanol, tertiary butanol, diethyl ether, ethyl acetate, benzene, toluene, acetonitrile, tetrahydrofuran, petroleum ether, p, and combinations thereof. Preferred embodiments are toluene, methyl ethyl ketone, ethyl acetate, 1,2-dichloroethane, and combinations thereof. The organic solvent content of the slurry is not the focus of this creation and can be adjusted depending on the viscosity of the desired slurry. The organic solvent content (based on the total weight of the slurry) is generally from 20 to 80% by weight, preferably from 35 to 55% by weight. Further ingredients may be further added to the slurry to extend the life of the provided wavelength conversion structure, as desired. Other ingredients that may be added as needed include, but are not limited to, stabilizers, absorbents, blockers, and combinations thereof. Here, such as alumina, 16 ^ M329794 oxidation and titanium dioxide metal oxide (preferably with nanometer size), can provide blocking benefits; such as diphenyl _ and material three slave organic compounds, is typical And ??, and and the external light to release heat; such as hindered amine light stabilizer, can absorb the excited group to prevent the chemical reaction caused by it. In general, to avoid adverse effects on the performance of the wavelength converting structure, the total amount of such added components is usually (based on the total weight of the slurry) not more than 1% by weight. In the above method, the foregoing phosphor powder and an adhesive may be blended in a solvent to form a desired slurry before or during coating. Thereafter, the slurry is applied to the surface of the substrate, and the solvent is removed by drying to obtain a desired wavelength conversion coating. Preferably, the slurry in the storage tank is moderately agitated during the coating process to avoid solids precipitation or phase separation due to differences in density. This agitation can be provided in a variety of convenient ways. For example (but not limited to), it can be mechanically stirred, homogenized, mixed, biaxially stirred, three-rolled, planetary, balled, or pulsed. Turbulence disturbances are formed in the slurry for agitation purposes. The above coating operation can be carried out in any convenient manner. For example (but not limited thereto), dip coating, comma coating, spraying coating, spin coating, extrusion may be employed. Slot coating, curtain coating, gravure coating, or roll-to-ro11 coating. Optionally, one or more coating operations can be performed to the desired coating thickness. The coating can be dried in any convenient manner. By way of example (but not by way of limitation), the drying may be carried out from the 17 'M329794 volatilization mode, or by a forced volatilization method of aeration and/or heating (eg, by hot-air). The wavelength conversion structure can be applied to a light emitting module. Here, an optically enhancing structure such as ruthenium or microparticles may be formed on the opposite side of the substrate coated with the wavelength conversion coating side to provide additional optical effects. The wavelength conversion structure may further include any suitable optical components, such as a diffusion plate, a diffusion film, a brightness enhancement film (BEF), a reflective brightness enhancement film (Dual Brightness, Enhancement Film; DBEF), and a slab (Prism). Plate), Lenticular Film, polarizing plate, or a combination of the foregoing optical films to provide brightness enhancement or polarizing efficacy. Another embodiment of the wavelength conversion structure is illustrated by the IB, 1C diagrams, wherein 〇, #, and 10 represent phosphor powders of different colors, respectively. In FIG. 1B, the wavelength conversion structure 104 includes a substrate 1〇41 and a wavelength conversion coating 1043 over the substrate 1041. The substrate 1〇41 is made of a transparent film layer 1045 like PET. The transparent sheet 1047 of PMMA, MS, or PC is bonded through a layer of polymer pressure sensitive adhesive 1049. The wavelength conversion structure 106 shown in FIG. 1C includes a substrate 1061 and a wavelength conversion coating 1063 over the substrate 1061, wherein the substrate 1061 is optically enhanced on one side with a germanium structure or a diffusion structure. structure. In addition, a protective film (such as a PET film) may be used to protect the substrate as needed. Fig. 2A shows an exploded schematic view of a light-emitting module to which the above-described wavelength conversion structure is applied. A UVc light source 203 is disposed in the frame 201 of the light emitting module 20. Light source 203 is typically a lamp. In order to fix the position of the lamp so as not to cause movement, a light source holder 18 M329794 207 (as shown in Fig. 2B) is conventionally disposed between the light source 203 and the bottom of the frame 201. The light source fixing base 2〇7 usually has a back plate 2〇71, a plurality of fixing frames 2073 and a supporting column 2075. The fixing frame 2073 and the supporting column 2075 are both disposed on the back plate 2071, and the back plate 2071 is fixed on the bottom of the frame 201. The fixing frame 2073 holds the light source 203 to be fixed in a proper position, and the supporting column 2075 can support the optical component (not shown) above the frame 201 so as not to sag. In order to protect the light source fixing base 207 from the UVc generated by the light source 203, the wavelength conversion coating layer (not shown) may be coated on the surface of the light source fixing base 207 as needed. The light-emitting module (including the backlight module) described below may be provided with a light source fixing seat as needed. For the sake of simplicity, unless otherwise specified, the description will be made without setting the light source fixing seat. Referring again to FIG. 2A, the frame 201 has an opening 2011, and a wavelength conversion structure 205 is disposed on the opening 2011 to form a sealed space 2013 containing air with the frame 201. The wavelength conversion structure 205 includes a wavelength conversion coating 2051 and a substrate 2053. The wavelength conversion coating 2051 is applied to the side surface φ of the substrate 2053 facing the light source 203 (i.e., on the surface side of the substrate 2053). In the light-emitting module 20, when the light source 203 generates UVc and is incident on the wavelength conversion structure 205, the phosphor powder in the wavelength conversion coating 2051 will be excited by UVc and emit visible light. The color of the visible light can be obtained by the principle of light mixing, for example, mixing red, green, and blue visible light to obtain substantially white visible light. Fig. 3A shows a cross-sectional view of a light-emitting module 30 to which the above-described wavelength conversion structure is applied. The light-emitting module 30 includes a frame 301, a wavelength conversion structure 305, air-containing sealed spaces 3013, M329794 surrounded by the pivot 301 and the wavelength conversion structure 305, and a UVc light source 303 located in the sealed space 3013. The wavelength conversion structure 305 includes a first wavelength conversion coating 3051 and a substrate 3053. The first wavelength conversion coating 3051 is applied on the side of the substrate 3053 facing the light source 303 (ie, on the surface side of the substrate 3053). . The first wavelength converting coating 3051 comprises a phosphor powder that is excited by UVc to release the first visible light. A second wavelength conversion coating 307 is disposed on the inner sidewall of the frame 301, and comprises a phosphor powder which is excited by UVc to release the second visible light. When the light source 303 generates UVc and is incident on the wavelength conversion structure 305 and the second wavelength conversion coating 307, the phosphor powder in the first wavelength conversion coating 3051 of the wavelength conversion structure 305 will be excited by UVc to release the first visible light. The phosphor powder in the second wavelength conversion coating 307 is excited by uvc to release the second visible light. After passing through the wavelength conversion structure 305, the second visible light is mixed with the first visible light emitted by the structure 305 to generate a third visible light. In the light-emitting module 3A of FIG. 3A, when the colors of the first visible light and the second visible light are the same, 'the third visible light having the same color as the first visible light and the second visible light but having a higher brightness; If the color of the first visible light and the second visible light are not at the same time, a light mixing effect may be generated to provide visible light having a color different from the first visible light and the second visible light. For example, when the first visible light includes red visible light and green visible light and the second visible light is blue light, white visible light can be generated by the aforementioned mixed light. The first wavelength conversion coating layer 307 can be disposed on the inner side wall of the frame 301 (as shown in FIG. 3A), or the second wavelength conversion coating layer 307 can be applied to the first wavelength conversion coating layer 307. A suitable flexible substrate (not shown) is formed to form a first wavelength conversion structure (not shown), and then the structure is placed on the inner side wall of the frame 301 ' M329794 to achieve To provide the desired blending benefits. • Figure 3B shows a cross-section of the illumination module 32 to which the wavelength conversion structure described above is applied. The light-emitting module 32 includes a frame 321, a wavelength conversion structure 325, and a sealed space containing air 3232 surrounded by the frame 321 and the wavelength conversion structure 325. A plurality of light sources are provided in the confined space 3213, and include a light source 3231 that can generate uVc and a light source 3233 that can generate visible light (e.g., blue visible light). The wavelength conversion structure 325 includes a wavelength conversion coating 3251 and a substrate 3253. The wavelength conversion coating layer 3251 is applied to the side of the substrate 3253 facing the light source (i.e., on the side of the substrate 3503). The wavelength converting coating 3251 comprises a phosphor powder that is capable of being excited by UVc to emit a visible light. In the light-emitting module 30 of the foregoing FIG. 3A, in the light-emitting module 32, when the light source 3231 generates UVc and is incident on the wavelength conversion structure 325, the phosphor powder in the wavelength conversion coating 3251 will be excited by UVc, and released. A first visible light is produced. The first visible light is mixed with the second visible light generated by the light source 3233 to generate a third visible light. The color of the third visible light may be the same as the first visible light and the second visible light (when the first visible light color is the same as the second visible light) or the first visible light and the second visible light mixed result (when the first visible light color Different from the second visible light). As is well known, in general, UVC light sources, in addition to UV light in the UVC band, may also provide a small amount of UV light in the UVa band and/or UVb band. In order to effectively utilize UVc, the phosphor powder of the present disclosure may be selected from a combination of a phosphor powder that absorbs UVe wavelength and a phosphor powder that absorbs other ultraviolet wavelengths, for example, an absorbable wavelength of substantially 365 nm (nm). UVB or 400 nanometer (nm) of UVa phosphor powder to fully convert the ultraviolet light emitted by the light source. 21 M329794 In order to avoid the above-mentioned traces of uvA band and/or uvB band ultraviolet light, the 'effect' may be included in the wavelength conversion coating of the light-emitting module, which can absorb 11¥0 and - UVa and 1JVb phosphor powder. In addition, the wavelength conversion structure of the light emitting module may further include a UV wavelength blocking coating to reduce any possible ultraviolet light leakage. For the embodiment of the light-emitting module with UV wavelength blocking coating, refer to Figures 4A to 4C, wherein Figure 4A is an exploded view of the light-emitting module, and Figures 4B and 4C are 4A. In the figure, a partial cross-sectional view of the wavelength conversion structure along the line AA', φ represents two different aspects of the wavelength conversion structure. As shown in FIG. 4A, the light-emitting module 40 includes a frame 401 having an opening 4〇11, and a UVc light source 4〇3 is disposed in the frame 401. A wavelength conversion structure 405' is disposed on the opening 4'11, and the wavelength conversion structure 4'5 is combined with the frame 4'' to form a sealed space 4013 containing air. Wherein, one embodiment of the wavelength conversion structure 4〇5 is as shown in the figure, and comprises a wavelength conversion coating 4〇5b a substrate 4〇53 and an ultraviolet wavelength blocking coating 4055 from bottom to top, ie The wavelength conversion coating 4051 and the ultraviolet wavelength blocking coating 4055 are placed on both sides of the substrate 4〇53. UV wavelength blocking coating 4〇55 also

Spring can optionally be placed on the same side of the substrate 4053 as the wavelength conversion coating 4051, as shown in Figure 4C. The UV wavelength blocking coating 4〇55 may be any material that blocks ultraviolet light, such as ultraviolet light blocking materials, ultraviolet light stabilizing materials, ultraviolet light absorbing materials, ultraviolet light reflecting materials, and combinations thereof. Commonly used ultraviolet light-blocking materials such as metal oxides may be oxidized, titanium dioxide, zinc oxide, and combinations thereof. /, the middle earth system uses a metal oxide whose particle control is substantially less than 1 micrometer. An external light L 疋 material such as hindered amine may be used, and an ultraviolet 22 ‘M329794 light absorbing material may be used, such as diphenyl ketone, benzotriazole, and combinations thereof. In order to further block the ultraviolet leakage, a protective layer may be further disposed in the sidewall of the casing of the light-emitting module. Referring to Fig. 5, a cross-sectional view of another light-emitting module in a frame portion is shown. The light-emitting module is as shown in Fig. 4A, but has a protective layer on the side wall of the frame. As shown in FIG. 5, this embodiment includes a frame 501 having a UVc light source 503 disposed therein, and a protective layer 505 disposed on the inner sidewall to block light emitted by the *UVc light source from penetrating the Frame 501. The protective layer 505 comprises a blockable ultraviolet light material or a reflective layer (e.g., a gold layer) as contained in the aforementioned ultraviolet light wavelength blocking coating. The inner side wall of the frame 501 may be provided with a wavelength conversion coating (for example, as shown in FIG. 3A). When the wavelength conversion coating is provided, the protective layer 505 is disposed between the inner wall of the frame and the wavelength conversion coating. The above various light-emitting modules can also be applied to various backlight modules of a display device, such as an edge-lit backlight module or a direct-lit backlight module. Figure 6 is a schematic diagram of an edge-lit backlight module 60 to which the illumination module is applied. The backlight module 60 includes a frame body 61'. One side of the frame body 61 is provided with a UVc light source 63, and one side of the light source 63 is provided with a wavelength φ conversion structure 65. A desired optical film such as a diffusion film 67, a light guide plate 675, a reflection sheet 679, and the like are provided at a suitable portion of the frame 61. Fig. 7 is a schematic view showing an application aspect of the above-mentioned light emitting module in a direct type backlight module. In the seventh embodiment, the direct-type backlight module 70 includes a frame 701 having an opening, a UVc light source 703 is disposed in the frame 701, and a wavelength conversion structure 705 is disposed on the opening of the frame body 7. The wavelength conversion structure is provided. An optical film 707 is provided on the 7〇5. The wavelength conversion structure 705 includes a wavelength conversion coating 7〇51 and a substrate 7053. The substrate 7053 is typically a light transmissive substrate, and the wavelength converting coating 7051 is typically disposed on the face side of the substrate 23 M329794 7053. • As described in Figure 2B above, the application of the optical film to the light-emitting module (including the backlight module) is conventionally provided with a light source fixing base including a support column in the frame of the light-emitting module. Among them, the support column is mainly used to avoid the sagging of the optical film and reduce the unevenness of the surface of the diaphragm, thereby eliminating the uneven brightness or the incorrect result. Figure 8 is a schematic diagram of one embodiment of a conventional direct type backlight module. The direct-type backlight module 80 includes a frame 81 having an opening, a light source 83 is disposed in the frame 81, an optical film 85 is disposed on the opening of the frame 81, and a support column 87 is supported in the frame 81 to support The optical film 85 is provided to avoid the unfavorable result of the unevenness of the surface of the diaphragm 85 (for the sake of simplicity, only the support column portion of the light source holder is shown in this figure). However, it has been found that when the direct type backlight module 70 shown in FIG. 7 adopts a conventional means to support the optical film 707 with a support post, since the optical film 707 is disposed on the wavelength conversion structure 705 and wavelength conversion The coating 7051 is disposed on the surface light source side of the wavelength conversion structure 705, so the wavelength conversion coating 7051 will directly contact the support column. This may cause the φ pillar to damage (such as scratch) the wavelength conversion coating 7051 during long-term use, or during the handling or installation of the backlight module, causing the backlight module to emit light defects. In order to avoid the phenomenon that the surface of the support column is damaged due to insufficient rigidity of the wavelength conversion structure or the wavelength conversion structure, a fixing device capable of providing a wavelength conversion structure may be further disposed in the backlight module to maintain the wavelength conversion structure. The surface is substantially flat and eliminates the use of support columns. Specifically, before a wavelength conversion structure is disposed in the backlight module, a force is applied to the wavelength conversion structure to make the surface substantially flat. Thereafter, the surface of the wavelength conversion structure is fixed in a state of being flat with a fixing means to maintain its surface substantially flat. A variety of suitable fixtures can be used. For example, the fixture can include first and second components that correspond to each other, and when the two components are coupled to each other, the shape of the wavelength conversion structure can be fixed such that the wavelength conversion structure has a substantially flat surface. Alternatively, the fixture may include an element that conforms to the frame to secure the shape of the wavelength conversion structure when combined with the frame. For example, referring to FIGS. 9A to 9F, an embodiment of the backlight module is shown, which includes a specific aspect of the above-mentioned fixing device, wherein the 9A is an exploded view of the backlight module, and the 9B is The 9F diagram is a partial cross-sectional view of the wavelength conversion structure along line BB' in Figure 9A, representing different aspects of the wavelength conversion structure. As shown in FIG. 9A, the backlight module 90 includes a frame 91 having an opening 911, a wavelength conversion structure 93 is disposed on the opening 911, and a UVc light source 95 is disposed in the frame 91. The wavelength conversion structure 93 includes a wavelength conversion coating 931 and a substrate 933, and the wavelength conversion coating 931 is located on the surface side of the substrate 933. The wavelength conversion structure 93 is fixed in shape by a fixing means comprising a first frame 971 and a second frame 973, and the frame 971 has substantially the same size as the frame 973. As shown in FIG. 9B, the frame 971 and the frame 973 are respectively fixed to the upper and lower sides of the wavelength conversion structure 93 via a suitable manner such as an adhesive to fix the shape of the wavelength conversion structure 93 to have a substantially flat surface. . The two frames included in the fixture are not necessarily of the same size and may be of different sizes, as shown in Figure 9C. In FIG. 9C, the fixing device includes a first frame 975 and a second frame 977, and the second frame 977 is smaller in size than the first frame 975 (or, conversely, 25, M329794, the first frame 977 is smaller in size than the second frame. 975) and can be embedded with the first frame 975. Thus, when the frame 975 is embedded with the frame 977, the wavelength converting structure 93 can be secured therein to maintain its surface substantially flat. Alternatively, as shown in FIG. 9D, the wavelength conversion structure 93 may be fixed to the frame 979 via an adhesive or other suitable means using only a frame 979 to maintain the surface of the wavelength conversion structure 93 substantially flat. On the frame 91. Alternatively, as shown in FIGS. 9E and 9F, a frame 981 having a smaller outer diameter than the opening 911 or a frame 983 having a larger inner diameter than the frame 91 on the side of the opening 911 may be used, and the frame 981 or 983 may be used with the frame. The 91 phase is embedded in such a manner that the shape of the wavelength conversion structure 93 is fixed to have a substantially flat surface. The frame of each of the above embodiments may be an integrally formed frame or a frame in which a plurality of strips are combined. Further, the shape of the frame is not limited to a rectangle, and may be other shapes (e.g., oval) required for the application. It is also possible to have a special configuration on the fixture to fix the wavelength conversion structure by a combination of configurations. Referring to FIGS. 10A to 10E, FIG. 10A is a schematic view showing another embodiment of φ of the backlight module, wherein FIG. 10A is an exploded view of the backlight module, and FIGS. 10B to 10E are the edges of FIG. 10A. A partial cross-sectional view of the wavelength conversion structure of the CC' line, representing different aspects of the wavelength conversion structure. In FIG. 10A, the frame 101 of the backlight module 100 has an opening 1011. A wavelength conversion structure 103 is disposed on the opening 1011, and a UVc light source 105 is disposed in the frame 101. The wavelength conversion structure 103 includes a wavelength conversion coating 1031 and a substrate 1033. The wavelength conversion coating 1031 is located on the surface of the substrate 1033. As shown in Fig. 10B, the fixture includes a first member 1071 having a concave structure and a second member 1073 having a convex structure. The position of the concave structure of a member 1071 of the 26th M329794 corresponds at least to the position of the convex structure of the second member 1073. Of course, the fixture may also include a first member 1075 having a convex configuration and a second member 1077 having a concave configuration as shown in Fig. 10C. Wherein the position of the concave structure corresponds to at least the position of the convex structure. Preferably, the concave structure and the convex structure are respectively a strip-shaped concave structure and a strip-shaped convex structure. Therefore, when the concave structure is embedded in the convex structure, the wavelength conversion structure 103 can be fixed therein while maintaining the surface thereof substantially flat. The benefit of the desired fixed wavelength conversion structure can also be provided by the combination of the frame and the fixture. Figure 10D shows a schematic diagram of one embodiment of this combination. Wherein, the frame body 101a further has a convex structure at the top end, and the fixing means comprises a first member 1079 having a concave structure, the concave structure being located at least corresponding to the position of the convex structure. When the two are embedded with each other, the wavelength conversion structure 103 can be fixed to maintain its substantially flat surface. Alternatively, it may have a concave structure at the top end of the frame and an element having a convex structure corresponding to the concave structure in the fixing means, see Fig. 10E. As shown in Fig. 10E, the frame body 101b further has a concave structure at the tip end, and the fixing means includes a first member 1081 having a convex structure, and the position of the concave structure corresponds to at least the position of the convex structure. In the above embodiments, the first components 1071, 1075, 1079, and 1081 and the second components 1073 and 1077 are disposed on a side of the wavelength conversion structure 103, but are not limited thereto. 1075, 1079, 1081 and second components 1073, 1077 may also be disposed on all sides of wavelength conversion structure 103 or other suitable locations. Each of the concave structure and the convex structure is also not limited by the shape of the drawing. In addition, the fixture 27 M329794 may optionally include two or more first or second components. For example, for a frame having a rectangular opening, the first element and the second element may be strips that are surrounded by a rectangle, or may be a combination of L-shaped or I-shaped strips. rectangle. In this case, when the combination of the frame and the fixing device is used to fix the wavelength conversion structure by the concave/convex structure, the fixing device may have a concave/convex structure corresponding to the top end of the frame. The I-shaped strips are fixed to the opposite sides of the wavelength conversion structure by being embedded on opposite sides of the top end of the frame to maintain the surface thereof substantially flat. The fixing device may also include two L-shaped strips having a concave/convex structure corresponding to the top end of the frame body, and the opposite side angles of the wavelength conversion structure are fixed by being embedded with the opposite corners of the top end of the frame body to maintain the surface thereof. It is substantially flat. The fixture can also be in other aspects. Referring to FIGS. 11A to 11D, FIG. 11A shows a backlight module 110, wherein FIG. 11A is an exploded view of the backlight module, and FIGS. 11B to 11D are partial wavelength conversion structures along the DD′ line in FIG. 11A. A schematic cross-section representing different aspects of the wavelength conversion structure. As shown in FIG. 11A, the backlight module 110 includes a frame 111. The frame 111 has an opening 1111. The opening 1111 is provided with a wavelength conversion structure 113. The frame 111 has a UVc light source 115. The wavelength conversion structure 113 includes a wavelength conversion coating 1131 and a substrate 1133, and the wavelength conversion coating 1131 is located on the surface side of the substrate 1133. As shown in Fig. 11B, the fixing device includes a first member 1171 having a connecting member and a second member 1173 having a connecting hole, the connecting member being engaged with the connecting hole. Thereby, the first element 1171 and the second element 1173 are bonded to the connection hole via the connector to fix the wavelength conversion structure 113 to have a substantially flat surface. The embodiment of the other backlight module is as shown in FIG. 11C, wherein the backlight module 28 M329794 is the same as that shown in the nA picture, but the frame uia included is further and the hole is included, and the solid technology is included. - a first element 1175 having a connector, the connection hole of the frame (1)a mating with the connector of the first element 1175. Thereby, the first element 1175 of the frame Ula (four) is fixed by the connector disk connecting hole, and the shape of the switching structure (1) is turned off to have a substantially flat surface. Similarly, as shown in FIG. 11D, the frame (10) of the backlight module further has a connecting member (the side convex portion is not shown in the figure), and the fixing device includes a connecting hole _

In the piece 1177, the connecting member cooperates with the connecting hole. The first element 1177 is bonded to the frame (10) and the fixing wire by the connecting hole and the connecting member to fix the wavelength conversion structure 113 to have a substantially flat surface. In the above embodiment, the first element 1177 or the second element 1173 is in the form of a strip, but is not limited thereto, and may be other suitable shapes. In addition, in particular, the connecting member may be a screw, the connecting hole may be a nut, or the connecting member may be a latch, and the connecting hole may be a card slot; or other conventional knowledge in the field Know the combination configuration.

The embodiment of the moonlight module is shown in Figures 12A to 12c, wherein the 12A picture is an exploded view of the backlight module, and the 12B and 12c pictures are the wavelength conversion structure along the ee line in the 12A picture. A schematic view of a partial section representing different aspects of the wavelength conversion structure. As shown in FIG. 12A, the backlight module 12A includes a frame ι21 having an opening 1211. The opening 1211 is provided with a wavelength conversion structure 123. The frame 12i is provided with a UVc light source 125. The wavelength conversion structure 123 includes a wavelength conversion coating 1231 and a substrate 1233' wavelength conversion coating 1231 located on the surface light source side of the substrate 1233. As shown in FIG. 12B, the backlight module 12 further includes a fixing device including a frame 1271 and an elastic member 1273 (for example, a clip). Through the fixing device, the replacement page of the elastic member 29 (November, 1996) I β ' 1273 fixes the wavelength conversion structure 123 to the frame 1271 to fix its shape so as to have a substantially flat surface. For another fixture aspect, refer to Figure 12C. Wherein, the frame 121a has a convex configuration on the top edge, and the fixing device includes a first member 1275 (e.g., a clip) having an elastic member. The wavelength conversion structure 123 is fixed to the frame 121a through the first member 1275 of the fixture to fix its shape to a substantially flat surface. In the above embodiments, the elastic member is not limited to the form of the drawings, and may be in the form of a spiral or other form suitable for application. φ Hereinafter, the wavelength conversion structure disclosed herein and its application will be further exemplified in a specific embodiment. EXAMPLES In the following examples, the components, materials and instruments used are as follows: ~ (1) Adhesive component: Adhesive solution a ··The solution containing 20% by weight of fluorinated macromolecule provided by Build-up (Chipaste), a wet film having a thickness of about 1 μm obtained from the adhesive solution A was completely dried at 50 ° C for 30 seconds. _ Adhesive solution B: PVDF (polyvinylidene difluoride) (Dyneon) was dissolved in acetone to prepare an acetone solution containing 7 wt% PVDF, and the thickness of the adhesive solution B was about 100 μm. The wet film was completely dry at 20 ° C for 20 seconds. Adhesive solution C: PVDF-HFP (polyvinylidene difluoride-co-hexafluoroproplene) (Atofina, model Kynar2801) was dissolved in acetone to prepare a solution containing 7 acetone. The thickness obtained from the adhesive solution C was 30 M329794. The wet film of about 100 microns was fully dried at 501 for 20 seconds. ~一"· (2) Phosphor powder: Japan Kasei company, model Lp_wi, color number ex_d. (3) Brightness test method j: Module of the measuring module · UVc light source (253.7 nm), the module is 60 cm long and 36 cm wide, and 16 UVc tubes are placed therein (the length is 590 cm, the tube The diameter is 3·5 cm, the wall thickness is 〇·7 cm, the lamp strength is 3100 μλν/cm2), the distance between the lamps is 2 cm, and the bottom of the lamp is an aluminum anti-skull film, above the module. Leave a sample placement area. Test method: Place the sample to be tested on top of the k source with a fluorescent coating facing the UVc light source, and place an optical measurement detector (in the enterprise, model rK828) at a distance of 5 cm above the sample. Take the chroma coordinates and brightness values. (4) Brightness test method II: Measurement module · · UVc light source (253.7 nm) module, the module is 72 cm long and 42 cm wide, and 16 UVc tubes are placed (length length is 710 cm, tube) The diameter is 3·5 cm, the wall thickness is 〇·7 cm, the lamp strength is 3450 pW/cm2), the distance between the lamps is 3.5 cm, and the light source is coated with the same wavelength conversion coating. The reflective sheet has a sample placement area above the module. Method 4: Place the sample to be tested on top of the lamp source with a fluorescent coating facing the UVc light source. Place a brightness colorimeter (Zhonghui Technology, model T〇pconBM7) 50 cm above the sample. Take the chroma coordinates and brightness values. Example 1 31 1VI329794 isbtix gg year

Hu \: -;*::,: Place 900 g of Adhesive Solution A in 2000 mTorr 4 一 1·_1": In a buttercup cup, stir with a magnet for 1 〇 minute. Add _ gram of phosphor powder and mix with the machine for 2 〇 minutes at room temperature to obtain a mixture of mixed particles. After mixing the sentence, add the person in the pneumatic pulse circulator for 30 minutes. Thereafter, it was applied on a ρΕτ substrate (thickness: 125 μm) by extrusion coating, and the distance between the extruded film opening and the ρΕΤ substrate was ΐ5 μm, the discharge pressure was 0·12 MPa, and the coating speed was 15 Metrics per minute. After the wet film was completed, it was dried by hot air at 50 ° C to provide a sample having a wavelength conversion coating of 12 to 15 μm thickness on the PET substrate. Using the shell test method I 'where the sample placement area is 3 〇 cm long and 2 〇 cm I and the distance between the sample and the light source is 1 · 5 cm; the X value of the sample is measured according to the color coordinate measurement method of CIE 1931, y value and brightness value, the results are listed in Table 表: Table 1 CIEx CIEy brightness (cd/M2) 0.271 0.321 5314 The result of wavelength conversion is shown in Figures 13A and 13B, where Figure 13A provides the UVc source The original source spectrum of the module, Figure 13B is the spectrum emitted by the resulting sample; it shows that the resulting wavelength conversion coating sample is effective in converting UVc to visible light. Example 2 The slurry preparation, coating and drying steps of Example 1 were repeated, but the resulting slurry was extrusion coated onto a PET substrate having a thickness of 125 μm to obtain a thickness of 12 to 15 μm on the PET substrate. A sample of a wavelength converted coating. 32 M329794 96. Il2av - Year Month ΕΓϋΙ Next, a 25 micron thick acrylic (former company, model S3277) was applied using a spatula to the surface of the resulting sample that was not coated with a wavelength-converting coating. After the coating was completed, the sample was pressed with an acrylic substrate (thickness 2 cm) and a PET protective substrate (thickness 25 μm) by a roller filming apparatus (Shisheng Industrial, model CSL-M25R). Wherein, the rubber surface of the sample is pressed against the acrylic substrate, and the PET protective substrate is pressed against the other side of the acrylic (poly(methyl methacrylate)) substrate. The bonding speed is 1.5 m/min, the pressure is 3 kgf/cm 2 and the temperature is 40 °C. Similarly, the above procedure was repeated except that the acrylic substrate was replaced with a polycarbonate substrate (thickness: 2 cm). The brightness test method I is used, wherein the sample placement area is 30 cm long and 20 cm wide and the distance between the sample and the light source is 2 cm; the X value, the y value and the brightness value of the sample are measured according to the color coordinate measurement method of CIE 1931. The results are listed in Table 2: Table 2 Substrate type CIEx CIEy Brightness (cd/M2) Acrylic substrate 0.289 0.321 4655 Polycarbonate substrate 0.280 0.321 4945

Example 3 The metered phosphor powder and the metered adhesive solution were separately prepared into a mixture having the weight ratios listed in Table 3, and respectively placed in a 50 ml sealed glass bottle and stirred by a magnet for 10 minutes, and then oscillated by ultrasonic waves. After 10 minutes, 6 parts of the slurry were obtained. A PET substrate (thickness 125 μm) of 10 cm wide and 15 cm long was adsorbed on a vacuum suction table, and each slurry was coated on a PET substrate by a wire bar coating method, and coated 33) aH.29 ι 年月日匕1 — : The speed is 10 meters per minute, and the coating of each slurry is repeated. Six PET substrates each coated with a different slurry were naturally dried in flowing air for 3 minutes to give a coating thickness of about 15 to 18 μm. The brightness test method I is used, wherein the sample placement area is 3 〇 cm long and the distance between the sample and the light source is 2 cm; the % value and the y value of the sample are measured according to the color coordinate measurement table 3 of αΕ1931. And brightness values, the results are listed in Table 3: Weight ratio of phosphor powder to adhesive CIEx CIEy Brightness (cd/M2) 〇·5 : 1 (Comparative example) 0.270 0.318 ^ 407 1:1 0.274 0.323 / 2.5 :1 0.291 —-~.— 0.346 Jyjj ^ 〇πο 5:1 0.288 _0.347 «3 GUV /1 c _ 10:1 0,292 a 1 ---- _ —M39_ __ 4078 _15:1 ----- -—--L 0.262 —------- — —_ 3726

M329794 Example 4 I. Adhesive containing fluorocarbon bond The procedure of preparation, coating and drying of the material of Example 3 was repeated except that Adhesive Solution A, Adhesive Solution B and Adhesive Solution c were used, and each phosphor was used. The weight ratio of the powder to the adhesive contained in the adhesive solution is 5: i. The aggregated materials are then placed on a PET substrate having a thickness of 125 « to obtain a coating thickness of =. Among them, the samples obtained by using the adhesive solutions A, B and c are respectively samples of mouths A, B and C 〇 34

M329794 uses the brightness test method I, in which the sample placement area is 10 cm long and 10 cm wide and the distance between the sample and the light source is 2 cm; the X value, y value and brightness of the sample are measured according to the color coordinate measurement method of CIE 1931. Values, the results are listed in Table 4-1: Table 4-1 Sample CIEx CIEy Brightness (cd/M2) A 0.282 0.314 3748 B 0.294 0.323 3502 C 0.296 0.327 3684

Further, an accelerated experiment was performed on Sample A and Sample C in the following manner. Sample A and sample C were placed on a single UV lamp control device, wherein the distance between the sample and the light source was 0.5 cm, the UV intensity was 10000 pW/cm2, and the sample irradiation area was 2 cm x 2 cm. The intensity and chromaticity were measured at the beginning and after 1000 hours of continuous exposure. The results are shown in the following table: Sample A Sample C Time Brightness (cd/m2) CIEx CIEy Brightness (cd/m2) CIEx CIEy Ohr 1180 0.290 0.340 940 0.286 0.323 lOOOOhr 890 0.296 0.333 800 0.294 0.333 II·Carbon argon-based adhesive (Comparative Example) The phosphor powder and the adhesive solution A were used in a ratio of 5:1 by weight of the phosphor powder to the adhesive. In a milliliter sealed glass bottle, the magnet was stirred for 10 minutes, stirred, and ultrasonically shaken for 10 minutes to obtain a fluorine-based slurry. Another preparation of a polyethylene 35 | scratch 1129 Ε 年 年 丨 去 M $ M329794 alcohol (PVA) adhesive solution • 20% by weight of PVA) and equal weight of the phosphor powder mixed with a mortar A carbon squirrel slurry was obtained (wherein the bond of the carbon-hydrogen bond was 98 kcal/mol). Next, a PET substrate (thickness: 125 μm) 10 cm wide and 15 cm long was adsorbed onto a vacuum suction table, and the two pastes were respectively applied to each PET substrate by a doctor blade method with a blade gap of 50 μm. The coating speed was 10 meters per minute. Thereafter, the PET substrate coated with the reduced secret material was placed in a circulating air for 3 minutes, and the PET substrate coated with the hydrocarbon slurry was heated in a hot air oven at 80 ° C for 30 minutes. The resulting coating thickness is about 17 to 20 microns. Use the brightness test method! , wherein the sample placement area is 3〇 cm long and 2〇 cm wide and the distance between the sample and the light source is 1.5 cm; according to the CIE1931 color coordinate scalar 'measurement method, the measured sample and the light source are irradiated (10) hours after the χ value, y Values and brightness values' results are listed in Table 4-2:

Table 4-2

PVA adhesive solution _〇------〇j83 〇,331 5043

The results in Table 4-2 show that compared to the performance of the hydrocarbon-based slurry with a slight attenuation of the brightness, the present disclosure uses a wavelength-converting coating prepared by using a fluorocarbon bond in the adhesive, even after the light source is irradiated for 180 hours. Brightness comparable to the initial one is still available. III. Other Adhesive Solution 36 M329794 In the month of Elftl, engrave 10 Tetraeth〇xysilane (TEOS), add 1 gram of methyl-ethoxy zephyr (Methyitrieth〇xysilane, MTEOS) 3 g / 酉 fine, 2 g of deionized water, and 1 ml of 1% hydrochloric acid (HCi) aqueous solution. Stir at room temperature for 30 minutes to a homogeneous phase. Further, 8 g of phosphor powder was added to the inorganic aqueous solution, and the U magnet was stirred for 60 minutes. After the mixing, the ultrasonic wave was shaken for 1 minute, and then the magnet was dropped by 30 minutes to obtain a slurry. The slurry was applied to a Φ PET substrate having a thickness of 100 μm in the manner described in Section 11 above. The coated PET substrate was dried in a loot oven for 60 minutes and taken out after cooling. Then use the brightness test method, where the sample placement area is 5 cm in diameter (19.6 cm 2 ) and the distance between the sample and the light source is 2 cm; the X and y values of the sample are measured according to the color coordinate measurement method of cmi931. And brightness values, the results are listed in Table 4-3: Table 4-3 Adhesive Type CIEx CIEy Brightness (cd/M2) Inorganic Adhesive 0,2728 0.3352 2673

Example 5 Using the twist test method II, the performance of the conventional CCFL module and the acrylic substrate sample prepared in Example 2 were compared under the same tube voltage, current and measurement mode, and the comparison results are shown in the table. Table 5-1 and Table 5-2: Table 5-1 37 M329794 Item / Specification CCFL CCFL + Lower diffuser CCFL + Lower diffuser + BEFIII CCFL + Lower diffuser + BEFIII + DBEFD Center luminance 4578 5928 8363 5729 Average brightness ( 81 points) 4578.7 5811.7 8102.3 5540.7 X chromaticity 0.2467 0.2489 0.2591 Υ 0.2 0.2212 0.2244 0 0.2453 Uniformity (9 points) 94% 95% 93% 94% Table 5-2 ——1—Item/Specification value conversion coating Conversion Coating + Lower Diffuser Conversion Coating + Lower Diffuser + __BEFIII Conversion Coating + Lower Diffuser + BEFIII + DBEFD Center Brightness 6376 8338 _U720 8066 Average Brightness (81 points) 6304.7 8218.6 11464.4 7863.2 X Chromaticity 0.2742 0.2762 ^^ 0^2813 0.2909 Υ色度0.3265 0.3279 __〇3362 0.3481 Uniformity (9 points) 92% 92% 91% ..93% The above results show that the performance of this wavelength conversion coating is superior to that of traditional CCFL. Then, using the brightness test method „, the obtained acrylic substrate sample (that is, the “conversion coating + lower diffusion plate” listed in Table 5_2) is irradiated for a long time in the uvc module, and the color coordinates and brightness changes thereof. If the clip is in June, it is shown in Table 6 and Figure 14; in the case of each lighting (irradiation) time, take the rain to know m" and take two identical samples of the acrylic substrate twice. The test results of the party test are divided into the results of the sample and the sample of the sample listed in Table 6. This result shows that after a long period of exposure, the 丨 丨 丨 波长 波长 波长 波长 波长 波长 波长 波长 仍 仍 仍 38 38 38 38 38 38 38 38 38 38 38 38 38 38 38 38 38 38 38 38 38 38

Second?

brightness. L Table 6 Lighting time (hours) Sample number Center luminance (nits) Average luminance (nits) CIEx CIEy 0 A 8703 8599.7 0.2905 0.3409 B 8860 8622.1 0.2844 0.3374 450 A 8755 8599.4 0.2931 0.3416 B 8562 8384.9 0.2816 0,3286 1880 A 8658 8475.4 0.2929 0.3399 B 8377 8188.8 0.2808 0.3267 3407 A 8413 8201.8 0.2930 0.3411 B 8226 8013.3 0.2812 0.3282

Example 6 (Effect of ultraviolet wavelength blocking coating) 20 g of the adhesive solution A and 20 g of the phosphor powder were placed in a 50 ml sealed glass bottle and stirred with a magnet for 10 minutes, and stirred for 10 minutes with ultrasonic waves. The slurry was applied by a doctor blade method to a quartz surface of 10 cm in width and 10 cm in length with a doctor blade gap of 50 μm and a coating speed of 10 m/min. The coated quartz was naturally dried in flowing air for 3 minutes, which resulted in a coating thickness of about 17 to 20 microns. This is a wavelength conversion coating sample that does not have a UV wavelength blocking coating. Another wavelength conversion coating sample was treated in the same manner, except that the quartz surface was previously coated with a layer of nano-oxidation materials with resistance to ultraviolet light (RDS No. 06) (manufactured by Advanced Nanotechnology, Australia). Model NanoZ), coating speed of 10 meters / minute, after coating, placed in a hot air oven at 100 ° C 39 il29 months

M329794 ^0. Dry for 30 minutes in the year and then use the brightness test method I, where the sample placement area is 30 cm long and 20 cm wide and the distance between the sample and the light source is 2 cm; measured according to the CIE1931 color coordinate measurement method. The X value, y value and brightness value of the sample are shown in Table 6 and Figure 15A (no UV wavelength blocking coating) and Figure 15B (with UV wavelength blocking coating): Table 7 CIEx CIEy Brightness ( Cd/M2) UV-free wavelength barrier coating 0.289 0.344 3339 UV-wavelength barrier coating 0.294 0.353 3535 From the comparison of Figure 15A and Figure 15B, the light-emitting module is still not provided when the UV wavelength blocking coating is not provided. Leaked out a small amount of unused UV light UVC band, _. and unused UV UVA band and UVB band; and when UV wavelength blocking coating is set, UV UVC band, UVA band and UVB band Blocked. In addition, as can be seen from Table 7, the use of the ultraviolet wavelength blocking coating does not substantially affect the performance of the light-emitting module. Example 7 (Benefit of Ultraviolet Light Wavelength Resisting Coating) As in Example 6, but PET (polyethylene terephthalate) as a substrate, and measuring ultraviolet light transmittance, as shown in Figures 16A and 16B, the former is not provided with ultraviolet light. Light wavelength M329794 186.11.29

The ultraviolet light transmission spectrum of the light-emitting module of the EJ blocking coating is used, and the latter is the ultraviolet light transmission spectrum of the light-emitting module with the long-lasting coating. The dotted line in the figure is the ultraviolet UVc band and The wavelength of the UVb band. Comparing the 16th and ΐ6β images, it can be seen that when the UV wavelength blocking coating is set, the leakage of ultraviolet light can be almost completely blocked. Example 8 (benefit of light mixing)

Providing two sets of structures as shown in FIG. 3, wherein the first set of first wavelength conversion coatings is the same as the second wavelength conversion coating, and the second set of first wavelength conversion coatings is coupled to the second wavelength conversion The coating is different. The adhesive solution used was the adhesive solution A, and the edge light powder used was a product of Kasei Corporation of Japan.

The first set of first wavelength converting coatings and second wavelength converting coatings are obtained in the following manner. The party UVc is excited to emit a red visible light phosphor powder (hereinafter referred to as "r phosphor powder"), and is excited by UVc to emit green visible light phosphor powder (hereinafter referred to as "G camping powder") And an illuminant powder which emits blue visible light by UVe excitation (hereinafter referred to as "BM body"), and is mixed at a ratio of 4.4:1.6:4.G to provide a phosphor powder mixture. The phosphor powder mixture was poured into 10 g of the adhesive solution A contained in a % ml sealed glass bottle and stirred by a magnet for 1 minute, and then vortexed by ultrasonic for 1 minute to provide a polymer. A PET substrate (thickness 1 () 〇 micron) having a length of 1 cm and a width of 15 cm was adsorbed onto a vacuum suction table, and the obtained web was applied onto the PET substrate by a doctor blade method. Wherein, the gap to the knife is % micrometer and the coating speed is H) meters/minute. Thereafter, the coated pET substrate was allowed to dry in a circulating air for 3 minutes, and the resulting coating thickness was about 50 micrometers. The preparation of the first wavelength conversion coating of the second group of structures of the claws M329794 δ6· 1L 29 is as in the first group structure, but the slurry used is via 6.4 g of R phosphor powder and The G phosphor powder was mixed in a ratio of 4.9·1.5 of the phosphor powder mixture to a 6.4 g gram adhesive solution. The second wavelength conversion coating of the second group of structures is also prepared according to the first group structure, but a slurry obtained by mixing 10 A grams of B phosphor powder with 1 gram of the adhesive solution A is applied to the slurry. On a PET substrate with a thickness of 225 microns. The two sets of pET substrates having the first wavelength conversion coating are disposed on the openings of the two sets of frames, respectively, and the attached substrate having the second wavelength conversion coating is disposed within the two sets of frames. Thereafter, the optical properties of the two sets of structures were measured, and the results are shown in Table 8: Table 8 CIEx CIEy Brightness (cd/M2) Group 1 0.2471 0.2285 3100 Group 2 0.2480 0.2243 ------ 3300 Table 8 Results Display, the brightness value provided by the second group is about the same as the first New Zealand

6%. I The above embodiments and aspects are merely illustrative of the principles of the present invention and the technical features thereof, and are intended to limit the shape or form of the components of the present invention, such as the graphic towel (4). It is not (4) the creation: The person who knows the technology is expected to be in the technical principle and spirit of the material back, but (4) the change of the finished condition or the arrangement of the equality belongs to the author's claim ^ 42 M^29794. Therefore, the scope of protection of this creation should be as listed in the scope of the patent application described later. BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1A is a schematic view showing an embodiment of the present wavelength conversion structure; FIG. 1B is a schematic view showing another embodiment of the present wavelength conversion structure, wherein the substrate is a composite layer; 1C is a schematic view showing still another embodiment of the present wavelength conversion structure, wherein the substrate is an optical enhancement structure; > Figure 2A shows a light-emitting module using a wavelength conversion structure; Figure 2B shows that it can be used for The light source fixing seat in the frame of the light emitting module of the present disclosure is not intended, and the 3A and 3B drawings show the mixed light state of the light emitting module to which the present disclosure is applied; the 4A to 4C charts show a UV light wavelength resisting coating. The embodiment of the light-emitting module of the layer; FIG. 5 is a schematic view showing a protective layer disposed on the sidewall of the frame of the light-emitting module; > FIG. 6 shows an embodiment of the edge-light backlight module applying the wavelength conversion structure Schematic diagram, FIG. 7 shows a schematic view of an embodiment of a direct-lit backlight module using a wavelength conversion structure, and FIG. 8 shows a schematic diagram of a conventional direct-lit backlight module; FIGS. 9A to 12C show various solid forms. Figure 13A shows the original source spectrum of the UVc module of Example 1; Figure 13B shows the spectrum of the light source of the UVc module via the wavelength conversion structure of Figure 13A. Figure 14 shows the color coordinates and brightness change of the sample obtained in Example 2 after 3400 hours of UVc irradiation; Figure 15A shows the spectrum of the ultraviolet light wavelength-stopping coating obtained in Example 6; Figure 15B shows Example 6 The obtained spectrum is provided with an ultraviolet wavelength blocking coating; FIG. 16A shows a spectrum of the ultraviolet light wavelength-stopping coating obtained in Example 7; and > Figure 16B shows that the ultraviolet light wavelength blocking is obtained in Example 7. Spectrogram of the coating. [Main component symbol description] 20, 30, 32, 40: Light-emitting module 60, 70, 80, 90, 100, 110, 120 ·• Backlight module 6 Bu 8 Bu 9 Bu, 101a, 101b, 11 Bu 111a , 111b, 121, 121a, 201, 3 (Π, 32, 4 (H, 501, 701: frame I 63, 83, 95, 105, 115, 125, 203, 303, 403, 503, 703, 3231, 3231 3233: light source 65, 93, 102, 103, 104, 106, 113, 123, 205, 305, 325, 405, 705 · wavelength conversion structure 85, 707: optical film 2075, 87: support column 505: protective layer 671 : Diffusion film 44 M529794 673 : Prism sheet. 675 : Light guide plate 679 : Reflecting sheet, * ... 91 Bu 1011, 1111, 121 Bu 2011, 4011 · Opening 307, 93 Bu 1023, 103 Bu 1043, 1063, 113 123 205 305 3051, 3251, 4051, 7051: wavelength conversion coating '933, 102, 1033, 104, 106, 1133, 1233, 2053, 3053, 3253, 4053, 7053: substrate® 971, 975: first Frames 973, 977: second frame 979, 981, 983, 1271: frame 1045: transparent film layer 1047 · transparent sheet 1049: polymer pressure sensitive adhesive 1071, 1075, 1079, 1081, 1171, 1175 1177, 1275: first element φ piece 1073, 1077, 1173: second element 1273: elastic member 2013, 3013, 3213, 4013: sealed space 4055: ultraviolet wavelength blocking coating 207: light source fixing seat 2071: back plate 2073 : Lamp holder 45

Claims (1)

- Patent application Chinese patent application scope replacement (January 97) fl丨7 IX. Patent application scope: 1. A backlight module comprising: a frame having an opening and forming a hollow region therein; An ultraviolet light source disposed in the hollow region; a wavelength conversion structure disposed on the opening, wherein the wavelength conversion structure comprises: a light transmissive substrate; A wavelength conversion coating layer is disposed on the ultraviolet light source side of the light transmissive substrate; and a fixing member that fixes the wavelength conversion structure to have a substantially flat surface, either alone or in combination with the frame. 2. The backlight module of claim 1, wherein the wavelength conversion coating comprises: a phosphor powder that is excited by ultraviolet rays; and an ultraviolet resistant adhesive; wherein the thickness of the wavelength conversion coating is a phosphor powder The average particle diameter is 2 to 10 times, and the content of the phosphor powder in the wavelength conversion coating is at least one of the following conditions: (1) The volume percentage of the phosphor powder in the wavelength conversion coating is 30% to 85% (based on the total volume of the phosphor powder and the adhesive); and (2) the weight ratio of the phosphor powder to the adhesive is 1:1 to 20··1. 3. The backlight module of claim 2, wherein the fixing member comprises: a first component; and a second component; wherein the first component corresponds to the second component, the first component and the 46 factory M329794 The second element is combined to provide a force for the wavelength conversion structure. 4. The backlight module of claim 3, wherein the first component is a first frame and the second component is a second frame, the first frame having the same or different dimensions as the second frame. 5. The backlight module of claim 4, wherein the second frame is smaller in size than the first frame to be embedded in the first frame. 6. The backlight module of claim 4, wherein the second frame and/or the first frame are attached to the wavelength conversion structure via an adhesive. 7. The backlight module of claim 3, wherein the first component comprises a concave structure and the second component comprises a convex structure, wherein the location of the convex structure corresponds to the concave structure . 8. The backlight module of claim 3, wherein the first component comprises a connector and the second component comprises a connection hole, the connection hole being mated with the connector. 9. The backlight module of claim 3, wherein the first component comprises a frame and the second component comprises an elastic member for fixing the wavelength conversion structure to the frame via the elastic member to provide a tension. 10. The backlight module of claim 2, wherein the fixing member comprises a first member corresponding to the frame such that the first member cooperates with the frame to provide a force for the wavelength conversion structure. 11. The backlight module of claim 10, wherein the first component comprises a frame. 12. The backlight module of claim 11, wherein the wavelength conversion structure is attached to the frame via an adhesive. 13. The backlight module of claim 11, wherein the outer diameter of the frame is smaller than the opening of the frame 47 / M329794 It can be embedded in the frame. 14. The backlight module of claim n, wherein the inner diameter of the frame is larger than a cross section of the frame at the side of the opening to be embedded with the frame. 15. The backlight module of claim 1 wherein the frame system comprises a concave structure and the first component comprises a convex structure, the convex structure being positioned corresponding to the concave structure. The backlight module of claim 10, wherein the frame further comprises a convex structure and the _ element comprises a concave structure, the convex structure being located corresponding to the concave structure. The backlight module of claim 1 , wherein the frame further comprises a connecting member and the first component comprises a connecting hole, the connecting hole is matched with the connecting member. The backlight module of claim 10, wherein the frame further comprises a connecting hole and the first component comprises a connecting member, the connecting hole is matched with the connecting member. The backlight module of claim 1 , wherein the first component comprises an elastic member and the frame further comprises a connector for fixing the wavelength conversion structure to the connector by the elastic member. Provide a force. The backlight module of any one of claims 1 to 19, wherein the permeable substrate comprises a material selected from the group consisting of PET, TAC, PEN, PES, PVDF, ΡΕ-ΡΟ, pp a transparent substrate of -PE, app, iPP, functionalized polyolefin, LLDPE-g-MA, and a combination of the above, or further comprising an optical material selected from the group consisting of: a diffusion film, a brightness enhancement film , reflective brightness enhancing film, polarizing film, and combinations thereof. 48 ^ 329794 VII. Designated representative map: (1) The representative representative of the case is: (9A). (2) A brief description of the symbol of the representative figure: 90 backlight module. 91 frame 911 opening 93 wavelength conversion structure 931 wavelength conversion coating 933 substrate 95 light source 973 second frame 971 first frame