Optical structure

Abstract

The invention discloses an optical structure which comprises a substrate, a light-emitting element, an adhesive layer and a dimming element. The light-emitting element is arranged on the substrate. The adhesive layer covers the light-emitting element. The dimming element is arranged on the adhesive layer. And the refractive index of the adhesive layer is different from that of the dimming element.

Description

Technical Field

[0001] The invention relates to an optical structure, in particular to an optical structure with a dimming element and a glue layer. Background Art

[0002] Light-emitting diodes (LEDs) are light-emitting elements widely used as light sources in various electronic devices. With the widespread application of electronic devices, consumers' expectations for electronic devices are gradually increasing.

[0003] In order to meet the demand for high resolution and achieve higher production capacity, the size of LEDs is constantly miniaturized, resulting in many unresolved problems in the manufacturing process of LEDs, which in turn affect the efficiency of light-emitting components. For example, the current packaging structure of LEDs still has problems such as limited light-emitting angle, low light-emitting efficiency, uneven brightness, and uneven color conversion.

[0004] Therefore, how to further improve the optical structure of light emitting diodes to enhance the performance of electronic devices is still one of the research topics in the industry. Summary of the invention

[0005] According to some embodiments of the present invention, a substrate, a light emitting element, a glue layer and a dimming element are included. The light emitting element is disposed on the substrate. The glue layer covers the light emitting element. The dimming element is disposed on the glue layer. Moreover, the refractive index of the glue layer is different from the refractive index of the dimming element.

[0006] According to some other embodiments of the present invention, an optical structure is provided, comprising a substrate, a light-emitting element, a wavelength conversion layer, a glue layer, and a dimming element. The light-emitting element is disposed on the substrate. The wavelength conversion layer covers the light-emitting element. The glue layer covers the wavelength conversion layer. The dimming element is disposed on the glue layer. Furthermore, the refractive index of the wavelength conversion layer is greater than the refractive index of the glue layer, and the width of the top surface of the glue layer is greater than the width of the bottom surface.

[0007] According to some other embodiments of the present invention, an optical structure is provided, comprising a substrate, a light-emitting element, a wavelength conversion layer, a glue layer, and an optical component. The light-emitting element is disposed on the substrate. The wavelength conversion layer is disposed on the light-emitting element. The glue layer covers the wavelength conversion layer. The optical component is disposed corresponding to the glue layer. Moreover, the refractive index of the wavelength conversion layer is greater than the refractive index of the glue layer.

[0008] In order to make the features and advantages of the present invention more obvious and easy to understand, various embodiments are given below and described in detail with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] Figure 1A A three-dimensional schematic diagram of an optical structure in some embodiments of the present invention;

[0010] Figure 1B In some embodiments of the present invention, corresponding to Figure 1A A schematic cross-sectional view of the optical structure along the section line A1-A1';

[0011] Figure 2A A three-dimensional schematic diagram of an optical structure in some embodiments of the present invention;

[0012] Figure 2B In some embodiments of the present invention, corresponding to Figure 2A A schematic cross-sectional view of the optical structure along the section line A2-A2';

[0013] Figure 3A A three-dimensional schematic diagram of an optical structure in some embodiments of the present invention;

[0014] Figure 3B In some embodiments of the present invention, corresponding to Figure 3A A schematic cross-sectional view of the optical structure along the section line A3-A3';

[0015] Figure 4A A three-dimensional schematic diagram of an optical structure in some embodiments of the present invention;

[0016] Figure 4B In some embodiments of the present invention, corresponding to Figure 4A A schematic cross-sectional view of the optical structure along the section line A4-A4';

[0017] Figure 5A A three-dimensional schematic diagram of an optical structure in some embodiments of the present invention;

[0018] Figure 5B In some embodiments of the present invention, corresponding to Figure 5A A schematic cross-sectional view of the optical structure along the section line A5-A5';

[0019] Fig. 6A A three-dimensional schematic diagram of an optical structure in some embodiments of the present invention;

[0020] Figure 6B In some embodiments of the present invention, corresponding to Fig. 6A A schematic cross-sectional view of the optical structure along the section line A6-A6';

[0021] Figure 7 A schematic cross-sectional view of an optical structure in some embodiments of the present invention;

[0022] Figure 8 A schematic cross-sectional view of an optical structure in some embodiments of the present invention;

[0023] Fig. 9 A schematic cross-sectional view of an optical structure in some embodiments of the present invention;

[0024] Fig.10 A schematic cross-sectional view of an optical structure in some embodiments of the present invention;

[0025] Fig.11 A three-dimensional schematic diagram of an optical structure in some embodiments of the present invention;

[0026] Fig.12 A three-dimensional schematic diagram of an optical structure in some embodiments of the present invention;

[0027] Fig.13 A three-dimensional schematic diagram of an optical structure in some embodiments of the present invention;

[0028] Fig.14 A three-dimensional schematic diagram of an optical structure in some embodiments of the present invention;

[0029] Fig.15 A three-dimensional schematic diagram of an optical structure in some embodiments of the present invention;

[0030] Fig.16 A three-dimensional schematic diagram of an optical structure in some embodiments of the present invention;

[0031] Fig.17 A three-dimensional schematic diagram of an optical structure in some embodiments of the present invention;

[0032] Fig.18A This is a light type simulation diagram of the optical structure in Comparative Example 1;

[0033] Fig.18B A light pattern simulation diagram of an optical structure in one embodiment of the present invention;

[0034] Fig. 18C A light pattern simulation diagram of an optical structure in one embodiment of the present invention;

[0035] Fig.18D A comparison of the light pattern simulation results of the optical structure in one embodiment of the present invention;

[0036] Fig.19A A light pattern simulation diagram of an optical structure in one embodiment of the present invention;

[0037] Fig.19B A light pattern simulation diagram of an optical structure in one embodiment of the present invention;

[0038] Fig.19C A light pattern simulation diagram of an optical structure in one embodiment of the present invention;

[0039] Fig. 20 is a schematic diagram of a comparison result of brightness distribution of an optical structure in a comparative example and an embodiment of the present invention;

[0040] Fig.21A is a schematic diagram of an image of an optical structure applied to an actual module in a comparative example;

[0041] Fig. 21B A schematic diagram of an image of an optical structure applied to an actual module in one embodiment of the present invention;

[0042] Fig.22A A light pattern simulation diagram of an optical structure in a comparative example and an embodiment of the present invention;

[0043] Fig. 22B is a schematic diagram of a comparison result of brightness distribution of an optical structure in a comparative example and an embodiment of the present invention;

[0044] Fig.23 A schematic cross-sectional view of an optical structure in some embodiments of the present invention;

[0045] Fig.24 A schematic cross-sectional view of an optical structure in some embodiments of the present invention;

[0046] Fig.25 is a schematic diagram of comparison results of brightness distribution of optical structures in a comparative example and some embodiments of the present invention;

[0047] Fig.26A as well as Fig.26B They are schematic diagrams of a light spot image of an optical structure and an image applied to an actual module in a comparative example;

[0048] Fig.27A as well as Fig.27B They are schematic diagrams of a light spot image of an optical structure and an image applied to an actual module in one embodiment of the present invention;

[0049] Fig.28A as well as Fig.28B They are schematic diagrams of a light spot image of an optical structure and an image applied to an actual module in one embodiment of the present invention;

[0050] Fig.29 A schematic cross-sectional view of an optical structure in some embodiments of the present invention;

[0051] Fig.30 A schematic cross-sectional view of an optical structure in some embodiments of the present invention;

[0052] Fig.31 A schematic cross-sectional view of an optical structure in some embodiments of the present invention;

[0053] Fig.32 A schematic cross-sectional view of an optical structure in some embodiments of the present invention;

[0054] Fig.33 A schematic cross-sectional view of an optical structure in some embodiments of the present invention;

[0055] Fig.34 A schematic cross-sectional view of an optical structure in some embodiments of the present invention;

[0056] Fig.35 A schematic cross-sectional view of an optical structure in some embodiments of the present invention;

[0057] Fig.36 A schematic cross-sectional view of an optical structure in some embodiments of the present invention;

[0058] Fig.37 A schematic cross-sectional view of an optical structure in some embodiments of the present invention;

[0059] Fig.38 A schematic cross-sectional view of an optical structure in some embodiments of the present invention;

[0060] Fig.39 A schematic cross-sectional view of an optical structure in some embodiments of the present invention;

[0061] Fig.40 A schematic cross-sectional view of an optical structure in some embodiments of the present invention;

[0062] Fig.41 A schematic cross-sectional view of an optical structure in some embodiments of the present invention;

[0063] Fig.42 A schematic cross-sectional view of an optical structure in some embodiments of the present invention;

[0064] Fig.43A as well as Fig.43B They are schematic diagrams of a light spot image of an optical structure and an image applied to an actual module in a comparative example;

[0065] Fig.44A as well as Fig.44B They are schematic diagrams of a light spot image of an optical structure and an image applied to an actual module in an embodiment;

[0066] Fig.45 A schematic diagram of a backlight module in some embodiments of the present invention;

[0067] Fig.46 A schematic diagram of a backlight module in some embodiments of the present invention;

[0068] Fig.47 A schematic diagram of a backlight module in some embodiments of the present invention;

[0069] Fig.48 A schematic diagram of a backlight module in some embodiments of the present invention;

[0070] Fig.49 FIG. 4 is a schematic diagram of a backlight module in some embodiments of the present invention.

[0071] Explanation of symbols

[0072] 1, 2, 3, 4, 5: Backlight module

[0073] 10A, 10B, 10C, 10D, 10E, 10F, 10G, 10H, 10I, 10J, 10K, 10L, 10M, 10N, 10O, 10P, 10Q, 10R, 10S, 10T, 10U, 10V, 10X, 10Y, 10Z, 11A, 11B, 11C, 11D, 11E, 11F, 11G, 11H, 11I, 11J, 11K, 11L: Optical structure

[0074] 102:Substrate

[0075] 104: Bracket

[0076] 104s: side surface

[0077] 106: Light emitting element

[0078] 106s: Side surface

[0079] 106t: Top surface

[0080] 108: wavelength conversion layer

[0081] 108s: Side surface

[0082] 108t: Top surface

[0083] 110: Adhesive layer

[0084] 110b: bottom surface

[0085] 110s: side surface

[0086] 110t: Top surface

[0087] 112: Dimming element

[0088] 112b: bottom surface

[0089] 112t: Top surface

[0090] 200: Optical components

[0091] 200a:Diffusive film

[0092] 200a': Wavelength conversion diffusion film

[0093] 200b: Wavelength conversion film

[0094] 200c: Brightening film

[0095] A1-A1', A2-A2', A3-A3', A4-A4', A5-A5', A6-A6': cut line

[0096] C-C': Center axis

[0097] H 108 , H 110 , H 112 :high

[0098] Rs: Depression

[0099] S 1 , S 2 :Side surface

[0100] P1: Part 1

[0101] P2: Part 2

[0102] W 106 , W 108 , W 110 , W 112 , W a , W b :width

[0103] X1-X1', X2-X2': symmetry axis

[0104] θ 1 ,θ 2 ,θ 3 ,θ 4 ,θ 5 ,θ 6 ,θ 7 ,θ 9 : Angle

[0105] θ 8: angle DETAILED DESCRIPTION

[0106] The optical structure of the embodiment of the present invention is described in detail below. It should be understood that the following description provides many different embodiments for implementing different aspects of some embodiments of the present invention. The specific elements and arrangements described below are only for simple and clear description of some embodiments of the present invention. Of course, these are only for example and not for limitation of the present invention. In addition, similar and / or corresponding numbers may be used in different embodiments to indicate similar and / or corresponding elements to clearly describe the present invention. However, the use of these similar and / or corresponding numbers is only for simple and clear description of some embodiments of the present invention, and does not represent any relevance between the different embodiments and / or structures discussed.

[0107] It should be understood that relative terms, such as "lower" or "bottom" or "higher" or "top", may be used in the embodiments to describe the relative relationship of one element of the drawings to another element. It is understood that if the device of the drawings is flipped upside down, the element described on the "lower" side will become the element on the "higher" side. The embodiments of the present invention can be understood in conjunction with the drawings, and the drawings of the present invention are also considered to be part of the disclosure. It should be understood that the drawings of the present invention are not drawn to scale, and in fact, the size of the elements may be arbitrarily enlarged or reduced to clearly show the features of the present invention.

[0108] Furthermore, when a first material layer is mentioned as being located on or above a second material layer, it may include a situation where the first material layer is in direct contact with the second material layer or the first material layer and the second material layer may not be in direct contact, that is, there may be one or more other material layers between the first material layer and the second material layer. However, if the first material layer is directly located on the second material layer, it means that the first material layer and the second material layer are in direct contact.

[0109] In addition, it should be understood that the ordinal numbers "first", "second" and similar terms mentioned in the specification or claims of this case are used to name different components or distinguish different embodiments or ranges, and are not used to limit the upper or lower limit of the number of components, nor are they used to limit the manufacturing order or setting order of the components.

[0110] In some embodiments of the present invention, terms such as "disposed", "connected" and similar terms, unless otherwise defined, may refer to two components being in direct contact, or may refer to two components not being in direct contact, wherein an additional component is located between the two structures. Terms such as "disposed", "connected" and similar terms may also include situations where both structures are movable or both structures are fixed.

[0111] In this document, the terms "about", "approximately", and "substantially" generally mean within 10%, within 5%, within 3%, within 2%, within 1%, or within 0.5% of a given value or range. The terms "a range is greater than or equal to a first value and less than or equal to a second value" or "a range is between a first value and a second value" mean that the range includes the first value, the second value, and other values ​​therebetween.

[0112] Unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meanings as commonly understood by one of ordinary skill in the art to which the present invention belongs. It is understood that these terms, such as those defined in commonly used dictionaries, should be interpreted as having a meaning consistent with the background or context of the relevant technology and the present invention, and should not be interpreted in an idealized or overly formal manner unless specifically defined in the embodiments of the present invention.

[0113] According to some embodiments of the present invention, the provided optical structure includes a wavelength conversion layer and an adhesive layer configured in a specific size ratio, thereby improving the luminous efficiency and luminous angle of the light-emitting element, reducing the number of components used in the module, and thus reducing the manufacturing cost. According to other embodiments of the present invention, the provided optical structure can increase the intensity of the lateral light source and enhance the effect of light source reflection. According to still other embodiments of the present invention, the provided optical structure includes a dimming layer and an adhesive layer configured in a specific size ratio, thereby improving the luminous efficiency and luminous angle of the light-emitting element. According to still other embodiments of the present invention, the provided optical structure includes an optical component that can additionally perform wavelength conversion, thereby maintaining a large-angle light type and effectively improving the blue halo and yellow halo phenomena.

[0114] According to some embodiments of the present invention, the optical structure described below may be applied to a backlight module, but the present invention is not limited thereto.

[0115] Please refer to Figure 1A as well as Figure 1B , Figure 1A A three-dimensional schematic diagram of an optical structure 10A according to some embodiments of the present invention is shown. Figure 1B In some embodiments of the present invention, corresponding to Figure 1A Schematic cross-sectional view of the optical structure 10A along the section line A1-A1' in FIG. It should be understood that, for the sake of clarity, some elements of the optical structure may be omitted in the drawings, and only some elements are schematically illustrated. According to some embodiments, additional features may be added to the optical structure described below. According to some embodiments, some features of the optical structure described below may be replaced or omitted.

[0116] like Figure 1A as well as Figure 1B As shown, the optical structure 10A may include a substrate 102 , a light emitting element 106 , a wavelength conversion layer 108 , a glue layer 110 and a dimming element 112 .

[0117] According to some embodiments, the substrate 102 includes a flexible substrate, a rigid substrate, or a combination thereof. According to some embodiments, the material of the substrate 102 may include glass, quartz, sapphire, ceramic, plastic, polyimide (PI), polycarbonate (PC), polyethyleneterephthalate (PET), polypropylene (PP), other suitable materials, or a combination thereof, but not limited thereto. In addition, the substrate 102 may be a light-transmitting substrate, a semi-transmitting substrate, or an opaque substrate. According to some embodiments, the substrate 102 may be a printed circuit board (PCB).

[0118] The light-emitting element 106 may be disposed on the substrate 102. The light-emitting element 106 may be a light-emitting diode, for example, a sub-millimeter light-emitting diode (mini-LED). According to some embodiments, the light-emitting element 106 may be electrically connected to a driving element (not shown) disposed on the substrate 102, and the driving element may include an active (active) driving element, a passive (passive) driving element, or a combination of the foregoing. The active driving element may include a thin-film transistor (TFT), but the present invention is not limited thereto. Furthermore, in an embodiment in which the driving element is a passive driving element, the driving element may be controlled, for example, by an integrated circuit (IC) or a microchip, but the present invention is not limited thereto. According to some embodiments, the light-emitting element 106 may emit blue light, red light, green light, or other suitable colors of light, but the present invention is not limited thereto. In some embodiments, the light-emitting element 106 may be a flip-chip light-emitting diode.

[0119] The wavelength conversion layer 108 may cover the light emitting element 106. Specifically, the wavelength conversion layer 108 may contact the top surface 106t and the side surface 106s of the light emitting element 106. The wavelength conversion layer 108 may convert the light generated by the light emitting element 106 into light having a specific color or a specific wavelength. The wavelength conversion layer 108 may have a matrix and one or more wavelength conversion substances dispersed in the matrix. According to some embodiments, the matrix may include a polymer material, but is not limited thereto. According to some embodiments, the wavelength conversion substance may include a phosphor, a quantum dot material, or a combination thereof, but is not limited thereto. Furthermore, according to some embodiments, the light emitting element 106 may be a light emitting diode that emits blue light, and the wavelength conversion layer 108 may include a yellow phosphor. For example, the yellow phosphor may be a yttrium aluminum garnet (YAG) phosphor, so that the optical structure 10A may emit white light, but the present invention is not limited thereto. According to some embodiments, the wavelength conversion layer 108 may include a red phosphor, a green phosphor, other suitable colors of phosphor, or a combination thereof, but is not limited thereto. According to some embodiments, the wavelength conversion layer 108 may include two different red phosphors, green phosphors, other suitable colors of phosphors, or a combination thereof, but is not limited thereto. In some embodiments, the wavelength conversion layer 108 may include a green phosphor and a red phosphor. For example, the wavelength conversion layer 108 may include a green SiAlON phosphor and a red K 2 SiF 6 :Mn 4+ In some embodiments, the wavelength conversion layer 108 may include a combination of green phosphor and two red phosphors. For example, the wavelength conversion film 200b may include a green SiAlON phosphor, a red K 2 SiF 6 :Mn 4+ With red (Sr,Ca)AlSiN 3 :Eu 2+ .

[0120] Furthermore, the adhesive layer 110 may cover the wavelength conversion layer 108. In detail, the adhesive layer 110 may contact the top surface 108t and the side surface 108s of the wavelength conversion layer 108. The adhesive layer 110 may protect the wavelength conversion layer 108, for example, has a moisture-proof function or an insulation function, and can improve the reliability of the overall structure. The adhesive layer 110 may include a light-curing adhesive material, a heat-curing adhesive material, a light-heat-curing adhesive material, or a combination of the foregoing, but is not limited thereto. According to some embodiments, the material of the adhesive layer 110 may include an optical clear adhesive (OCA), an optical clear resin (OCR), other suitable materials, or a combination of the foregoing, but is not limited thereto. In some embodiments, the material of the adhesive layer 110 may include silicone. The adhesive layer 110 may be transparent or translucent. In some embodiments, the adhesive layer 110 may include diffusion particles. In some embodiments, the diffusion particles may include inorganic particles, organic polymer particles, or a combination thereof. For example, the inorganic particles may include silicon oxide, titanium oxide, titanium dioxide, aluminum oxide, calcium carbonate, barium sulfate, boron nitride, zirconium dioxide, or any combination thereof, but the present invention is not limited thereto. For example, the inorganic particles may include solid silicon dioxide or hollow silicon dioxide, or any combination thereof, but the present invention is not limited thereto. For example, the organic polymer particles may include polymethyl methacrylate (PMMA), polystyrene (PS), acrylonitrile-butadiene-styrene copolymer (ABS), polyurethane (PU), or any combination thereof, but the present invention is not limited thereto.

[0121] It is worth noting that the refractive index of the wavelength conversion layer 108 is different from the refractive index of the glue layer 110, and the refractive index of the wavelength conversion layer 108 may be greater than the refractive index of the glue layer 110. Specifically, according to some embodiments, the refractive index of the glue layer 110 is between 1.4 and 1.6, for example, 1.45, 1.5 or 1.55, but not limited thereto. According to some embodiments, the refractive index of the wavelength conversion layer is between 1.6 and 2.6, for example, 1.7, 1.8, 1.9, 2, 2.1, 2.2, 2.3, 2.4 or 2.5, but not limited thereto. When the refractive indices of the wavelength conversion layer 108 and the glue layer 110 have the above relationship, the luminous efficiency of the light-emitting element 106 can be improved, and the light type of the optical structure can be improved. According to some embodiments, the ratio of the refractive index of the glue layer 110 to the refractive index of the wavelength conversion layer 108 is less than 1 (that is, the refractive index of the glue layer 110 / the refractive index of the wavelength conversion layer 108<1). In addition, according to some embodiments, the roughness of the side surface 110s of the glue layer 110 may be between 0.012μm and 2μm, or between 0.02μm and 1.9μm, or between 0.05μm and 1.8μm, or between 0.1μm and 1.7μm, for example, 0.2μm, 0.3μm, 0.4μm, 0.5μm, 0.6μm, 0.7μm, 0.8μm, 0.9μm, 1μm, 1.1μm, 1.2μm, 1.3μm, 1.4μm, 1.5μm or 1.6μm, but is not limited thereto.

[0122] like Figure 1B As shown, the wavelength conversion layer 108 may have a width W 108 , the glue layer 110 may have a width W 110 According to some embodiments, the width W of the wavelength conversion layer 108 is 108 The width W of the adhesive layer 110 110 The ratio can be greater than 0 and less than or equal to 0.5 (i.e. 0 <W 108 / W 110 ≤0.5), for example, 0.05, 0.1, 0.15, 0.2, 0.25, 0.3, 0.35, 0.4 or 0.45, but not limited thereto. Furthermore, the wavelength conversion layer 108 may have a height H 108 , the glue layer 110 may have a height H 110 According to some embodiments, the height H of the wavelength conversion layer 108 is 108 The height H of the adhesive layer 110 110 The ratio can be greater than 0 and less than or equal to 0.5 (i.e. 0 <H 108 / H 110≤0.5), for example, 0.05, 0.1, 0.15, 0.2, 0.25, 0.3, 0.35, 0.4 or 0.45, but not limited thereto. It is worth noting that when the area of ​​the wavelength conversion layer 108 covered by the adhesive layer 110 is too small, it may cause the light emitting element 106 to emit uneven light; on the contrary, when the area of ​​the wavelength conversion layer 108 covered by the adhesive layer 110 is too large (for example, W 108 / W 110 >0.5 and / or H 108 / H 110 >0.5), the luminous flux may be reduced, thereby affecting the luminous efficiency of the light-emitting element 106. In other words, when the height and width ratio of the wavelength conversion layer 108 and the adhesive layer 110 falls within the above range (0 <W 108 / W 110 ≤0.5 and 0 <H 108 / H 110 ≤0.5), the luminous efficiency of the light-emitting element 106 can be effectively improved and the light type of the optical structure can be improved.

[0123] According to some embodiments of the present invention, the aforementioned width W 108 The width W refers to the maximum width of the wavelength conversion layer 108 in a direction perpendicular to the normal direction of the substrate 102 (eg, the X direction in the figure); 110 It refers to the maximum width of the adhesive layer 110 in a direction perpendicular to the normal direction of the substrate 102 (eg, the X direction in the figure). According to some embodiments of the present invention, the height H 108 It refers to the maximum height of the wavelength conversion layer 108 in the normal direction to the substrate 102 (eg, the Z direction in the figure); the height H 110 It refers to the maximum height of the glue layer 110 in the normal direction to the substrate 102 (eg, the Z direction in the figure), that is, the maximum distance from the bottom surface (not marked) of the light emitting element 106 to the top surface (not marked) of the glue layer 110 .

[0124] In addition, if Figure 1A as well as Figure 1BAs shown, the dimming element 112 may be disposed on the adhesive layer 110, and the dimming element 112 may be in contact with the adhesive layer 110. The dimming element 112 may further enhance the luminous intensity of the optical element 106. According to some embodiments, the dimming element 112 may have a high reflectivity, and the reflectivity of the dimming element 112 may be greater than 90%, for example, 91%, 92%, 93%, 94%, 95%, 96%, 97%, 98%, 99% or 100%. According to some embodiments, the dimming element 112 has a substrate and a high reflectivity material disposed on the surface of the substrate or in the substrate. The material of the matrix may include an organic material, such as epoxy resin, acrylic resin such as polymethylmetacrylate (PMMA), benzocyclobutene (BCB), polyimide, polyester, polydimethylsiloxane (PDMS), polyethylene terephthalate (PET), polycarbonate (PC) and other suitable materials or combinations thereof, but not limited thereto. In some embodiments, the material of the matrix may include glass. According to some embodiments, the high reflectivity material may include silver (Ag), aluminum (Al), titanium (Ti), titanium dioxide (TiO 2 ) and other suitable materials or combinations thereof, but not limited thereto. According to some embodiments, the high reflectivity material may include a thermosetting high reflective silicone resin, but not limited thereto. In some embodiments, the dimming element 112 is partially reflective and partially transmissive. In some embodiments, in the Z direction, the dimming element 112 and the adhesive layer 110 are substantially coplanar.

[0125] Furthermore, the dimming element 112 may have a height H 112 According to some embodiments, the height H of the dimming element 112 112 The width W of the dimming element 112 may be between 10 μm and 300 μm, or between 50 μm and 250 μm, for example, 100 μm, 150 μm or 200 μm, but not limited thereto. 112 , the width W of the dimming element 112 112 The width W of the adhesive layer 110 110 The ratio can be greater than 0 and less than or equal to 1 (i.e. 0 <W 112 / W 110 ≤1). According to some embodiments of the present invention, the aforementioned width W 112 It refers to the maximum width of the dimming element 112 in a direction perpendicular to the normal direction of the substrate 102 (eg, the X direction in the figure); the height H 112It refers to the maximum height of the dimming element 112 in the normal direction of the substrate 102 (eg, the Z direction in the figure). In this embodiment, the width W of the dimming element 112 is 112 The width W of the adhesive layer 110 110 are substantially equal, that is, the width W of the dimming element 112 112 The width W of the adhesive layer 110 110 The ratio of is substantially equal to 1. Furthermore, in this embodiment, the dimming element 112 is conformally disposed on the adhesive layer 110 and is in a flat plate shape, but is not limited thereto.

[0126] Furthermore, the refractive index of the adhesive layer 110 may be different from the refractive index of the dimming element 112. According to some embodiments, the refractive index of the dimming element 112 may be greater than the refractive index of the adhesive layer 110. According to some embodiments, the dimming element 112 may be a symmetrical structure. According to some embodiments, the optical structure 10A may be a symmetrical structure, for example, having a central axis C-C'. The elements of the optical structure 10A may use the central axis C-C' as a symmetry axis and have any suitable shape as required. In some embodiments, the optical structure 10A may include a bracket 104. The bracket 104 may increase the optical efficiency, and because the contact area at the bottom of the bracket 104 is larger, the yield of the optical structure 10A placed on the substrate 102 is increased. It should be understood that the optical structures in the embodiments of the present invention may have a state including the bracket 104 and a state not including the bracket 104. The detailed structure of the bracket 104 will be further described below.

[0127] Other aspects of the optical structure of the embodiment of the present invention will be further described below. It should be understood that the same or similar elements as those in the above will be represented by the same or similar reference numerals, and their materials, features and functions are the same or similar to those described above, so this part will not be repeated in the following.

[0128] Please refer to Figure 2A as well as Figure 2B , Figure 2A Showing a three-dimensional schematic diagram of an optical structure 10B according to some other embodiments of the present invention, Figure 2B In some embodiments of the present invention, corresponding to Figure 2A Schematic cross-sectional view of the optical structure 10B along the section line A2-A2'.

[0129] The optical structure 10B is substantially similar to the optical structure 10A. Compared with the optical structure 10A, the optical structure 10B further includes a bracket 104. The bracket 104 can be disposed between the substrate 102 and the light emitting element 106, and the bracket 104 can be disposed between the substrate 102 and the wavelength conversion layer 108. Figure 2BAs shown, according to some embodiments, the side surface 108s of the wavelength conversion layer 108 is substantially coplanar with the side surface 104s of the bracket 104, but the present invention is not limited thereto. According to other embodiments, the side surface 108s of the wavelength conversion layer 108 is not coplanar with the side surface 104s of the bracket 104, for example, the side surface 104s of the bracket 104 may protrude from the side surface 108s of the wavelength conversion layer 108. According to some embodiments, the side surface 104s of the bracket 104 is substantially coplanar with the side surface 110s of the transparent adhesive layer 110. Furthermore, according to some embodiments, the bracket 104 may be in the shape of a plate. It is worth noting that the generally used groove-type bracket can only emit light in the forward direction, so the luminous efficiency is low and the luminous angle is small. In comparison, the flat bracket 104 of the present invention embodiment can increase the intensity of the lateral light source, improve the luminous efficiency, reduce the number of uses when applied to the module, and thus reduce the manufacturing cost. In some embodiments, the optical structure 10B may not include the bracket 104. In the embodiment without the bracket 104 , the optical structure 10B can have better heat dissipation performance and lower manufacturing cost.

[0130] In addition, compared with the optical structure 10A, the adhesive layer 110 of the optical structure 10B has a curved surface. For example, the adhesive layer 110 of the optical structure 10B may have a curved top surface 110t. Furthermore, the dimming element 112 may be conformably disposed on the adhesive layer 110, so the dimming element 112 may also have a curved surface. For example, the dimming element 112 of the optical structure 10B may have a curved top surface 112t and a bottom surface 112b. In some embodiments, in the Z direction, the side surface of the curved dimming element 112 is substantially coplanar with the side surface of the adhesive layer 110.

[0131] Similarly, in this embodiment, the refractive index of the wavelength conversion layer 108 is different from the refractive index of the adhesive layer 110, and the refractive index of the wavelength conversion layer 108 may be greater than the refractive index of the adhesive layer 110. In other words, the ratio of the refractive index of the adhesive layer 110 to the refractive index of the wavelength conversion layer 108 is less than 1. This configuration can enhance the luminous efficiency of the light-emitting element 106 and improve the light pattern of the optical structure.

[0132] Similarly, in this embodiment, the width W of the wavelength conversion layer 108 is 108 The width W of the adhesive layer 110 110 The ratio can be greater than 0 and less than or equal to 0.5 (i.e. 0 <W 108 / W 110 ≤0.5), for example, 0.05, 0.1, 0.15, 0.2, 0.25, 0.3, 0.35, 0.4 or 0.45, but not limited thereto. Furthermore, the height H of the wavelength conversion layer 108 108 The height H of the adhesive layer 110 110The ratio can be greater than 0 and less than or equal to 0.5 (i.e. 0 <H 108 / H 110 ≤0.5), for example, 0.05, 0.1, 0.15, 0.2, 0.25, 0.3, 0.35, 0.4 or 0.45, but not limited thereto. It should be understood that in the embodiment where the optical structure has the bracket 104, the height H 110 It refers to the maximum height of the adhesive layer 110 plus the bracket 104 in the normal direction to the substrate 102 (for example, the Z direction in the figure), that is, the maximum distance from the bottom surface (not marked) of the bracket 104 to the top surface 110t of the adhesive layer 110.

[0133] It is worth noting that when the ratio of the height and width of the wavelength conversion layer 108 to the adhesive layer 110 falls within the above range (0 <W 108 / W 110 ≤0.5 and 0 <H 108 / H 110 ≤0.5), the luminous efficiency of the light emitting element 106 can be effectively improved and the light pattern of the optical structure can be improved. In addition, in this embodiment, the width W of the dimming element 112 is 112 The width W of the adhesive layer 110 110 The ratio is essentially equal to 1.

[0134] Next, please refer to Figure 3A as well as Figure 3B , Figure 3A Showing a three-dimensional schematic diagram of an optical structure 10C according to some other embodiments of the present invention, Figure 3B In some embodiments of the present invention, corresponding to Figure 3A Schematic cross-sectional view of the optical structure 10C along the section line A3-A3'.

[0135] The optical structure 10C is substantially similar to the optical structure 10A. Compared with the optical structure 10A, the optical structure 10C further includes a bracket 104, and the adhesive layer 110 has a curved surface, for example, the adhesive layer 110 is semi-spherical. In detail, the adhesive layer 110 is substantially semi-spherical, but has a flat top surface 110t. Furthermore, in this embodiment, the dimming element 112 can be disc-shaped, and the dimming element 112 can be disposed on the top surface 110t of the adhesive layer 110. In this embodiment, the width W of the dimming element 112 is 112 The width of the top surface 110t of the adhesive layer 110 is substantially the same as the width (not shown) of the top surface 110t of the adhesive layer 110. In some embodiments, the optical structure 10C may not include the bracket 104.

[0136] Similarly, in this embodiment, the refractive index of the wavelength conversion layer 108 is different from the refractive index of the adhesive layer 110, and the refractive index of the wavelength conversion layer 108 may be greater than the refractive index of the adhesive layer 110. In other words, the ratio of the refractive index of the adhesive layer 110 to the refractive index of the wavelength conversion layer 108 is less than 1. This configuration can enhance the luminous efficiency of the light-emitting element 106 and improve the light pattern of the optical structure.

[0137] Similarly, in this embodiment, the width W of the wavelength conversion layer 108 is 108 The width W of the adhesive layer 110 110 The ratio can be greater than 0 and less than or equal to 0.5 (i.e. 0 <W 108 / W 110 ≤0.5), for example, 0.05, 0.1, 0.15, 0.2, 0.25, 0.3, 0.35, 0.4 or 0.45, but not limited thereto. Furthermore, the height H of the wavelength conversion layer 108 108 The height H of the adhesive layer 110 110 The ratio can be greater than 0 and less than or equal to 0.5 (i.e. 0 <H 108 / H 110 ≤0.5), for example, 0.05, 0.1, 0.15, 0.2, 0.25, 0.3, 0.35, 0.4 or 0.45, but not limited thereto. It is worth noting that when the height and width ratio of the wavelength conversion layer 108 to the adhesive layer 110 falls within the above range (0 <W 108 / W 110 ≤0.5 and 0 <H 108 / H 110 ≤0.5), the luminous efficiency of the light emitting element 106 can be effectively improved and the light pattern of the optical structure can be improved. In addition, in this embodiment, the width W of the dimming element 112 is 112 The width W of the adhesive layer 110 110 The ratio is greater than 0 and less than 1.

[0138] Next, please refer to Figure 4A as well as Figure 4B , Figure 4A A three-dimensional schematic diagram showing an optical structure 10D according to some other embodiments of the present invention is shown. Figure 4B In some embodiments of the present invention, corresponding to Figure 4A Schematic cross-sectional view of the optical structure 10D along the section line A4-A4'.

[0139] The optical structure 10D is substantially similar to the optical structure 10A. Compared with the optical structure 10A, the width Wa of the top surface 110t of the adhesive layer 110 of the optical structure 10D may be greater than the width Wb of the bottom surface 110b. In other words, the adhesive layer 110 of the optical structure 10D may be trapezoidal. In this embodiment, the dimming element 112 may be a flat plate, and the dimming element 112 may be disposed on the top surface 110t of the adhesive layer 110. In this embodiment, the width Wa of the top surface 110t of the adhesive layer 110 is equal to the width Wb of the bottom surface 110b. 112 Furthermore, according to some embodiments, the width Wa of the top surface 110 t of the glue layer 110 may be greater than the width W of the wavelength conversion layer 108 . 108 According to some embodiments, the width Wb of the bottom surface 110b of the glue layer 110 may be greater than the width W of the wavelength conversion layer 108. 108 According to some embodiments, the height H of the wavelength conversion layer 108 is 108 It can be less than or equal to the height H of the adhesive layer 110 110 In this embodiment, the width W of the dimming element 112 is 112 The width W of the adhesive layer 110 110 The ratio is essentially equal to 1.

[0140] In addition, if Figure 4B As shown, there is an angle θ between the side surface 110s and the bottom surface 110b of the adhesive layer 110. 1 , an angle θ is formed between the side surface 110s of the adhesive layer 110 and the top surface 110t of the adhesive layer 110 2 In this embodiment, the angle θ between the side surface 110s and the bottom surface 110b of the adhesive layer 110 is 1 Greater than 90 degrees and less than or equal to 150 degrees (i.e. 90 degrees < angle θ 1 ≤150 degrees), and the angle θ between the side surface 110s and the top surface 110t of the glue layer 110 2 Greater than or equal to 30 degrees and less than 90 degrees (i.e. 30 degrees < angle θ 2 ≤90 degrees). In this embodiment, the side surface 110s of the glue layer 110 is inclined. In particular, through the above configuration, the light emitting element 106 can have a larger light emitting angle, which can further improve the light type of the optical structure.

[0141] According to some embodiments, the dimming element 112 may be a symmetrical structure, for example, the dimming element 112 may have a symmetry axis X1-X1' and a symmetry axis X2-X2', and may have any suitable shape as required. Furthermore, the optical structure 10D may be a symmetrical structure, for example, having a central axis C-C', and the elements of the optical structure 10D may use the central axis C-C' as a symmetry axis, and may have any suitable shape as required.

[0142] Similarly, in this embodiment, the refractive index of the wavelength conversion layer 108 is different from the refractive index of the adhesive layer 110, and the refractive index of the wavelength conversion layer 108 may be greater than the refractive index of the adhesive layer 110. In other words, the ratio of the refractive index of the adhesive layer 110 to the refractive index of the wavelength conversion layer 108 is less than 1. Furthermore, the refractive index of the adhesive layer 110 may be different from the refractive index of the dimming element 112, and the refractive index of the dimming element 112 may be greater than the refractive index of the adhesive layer 110. This configuration can improve the luminous efficiency of the light-emitting element 106 and improve the light type of the optical structure. In some embodiments, the optical structure 10D may include a bracket 104.

[0143] Next, please refer to Figure 5A as well as Figure 5B , Figure 5A Showing a three-dimensional schematic diagram of an optical structure 10E according to some other embodiments of the present invention, Figure 5B In some embodiments of the present invention, corresponding to Figure 5A Schematic cross-sectional view of the optical structure 10E along the section line A5-A5'.

[0144] The optical structure 10E is substantially similar to the optical structure 10A. Compared with the optical structure 10A, the width Wa of the top surface 110t of the adhesive layer 110 of the optical structure 10E may be greater than the width Wb of the bottom surface 110b. In this embodiment, the dimming element 112 may be a flat plate, and the dimming element 112 may be disposed on the top surface 110t of the adhesive layer 110. In this embodiment, the width Wa of the top surface 110t of the adhesive layer 110 is equal to the width Wb of the dimming element 112. 112 Furthermore, according to some embodiments, the width Wa of the top surface 110 t of the glue layer 110 may be greater than the width W of the wavelength conversion layer 108 . 108 According to some embodiments, the width Wb of the bottom surface 110b of the glue layer 110 may be greater than the width W of the wavelength conversion layer 108. 108 According to some embodiments, the height H of the wavelength conversion layer 108 is 108 It can be less than or equal to the height H of the adhesive layer 110 110 .

[0145] In addition, if Figure 5B As shown, the adhesive layer 110 of the optical structure 10E may further include a first portion P1 and a second portion P2 disposed on the first portion P1. Furthermore, the first portion P1 has a side surface S 1 , the second portion P2 has a side surface S 2 , and the side surface S of the first portion P1 1 The side surface S of the second portion P2 2 Furthermore, the side surface S of the first portion P1 of the adhesive layer 110 is 1There is an angle θ between the bottom surface 110b of the adhesive layer 110 3 , the side surface S of the second portion P2 of the adhesive layer 110 2 There is an angle θ between the top surface 110t of the adhesive layer 110 4 In this embodiment, the side surface S of the first portion P1 1 The angle θ between the bottom surface 110b of the adhesive layer 110 3 Can be greater than 90 degrees and less than or equal to 150 degrees (i.e. 90 degrees < angle θ 3 ≤150 degrees). In this embodiment, the side surface S of the second portion P2 2 The angle θ between the top surface 110t of the glue layer 110 4 It can be equal to 90 degrees (i.e., the angle θ 4 =90 degrees). In this embodiment, the side surface S of the first portion P1 of the adhesive layer 110 1 The side surface S of the second portion P2 of the adhesive layer 110 is inclined. 2 It is substantially perpendicular to the top surface 110t. In particular, through the above configuration, the light emitting element 106 can have a larger light emitting angle, which can further improve the light type of the optical structure.

[0146] According to some embodiments, the dimming element 112 may be a symmetrical structure. For example, the dimming element 112 may have a symmetry axis X1-X1' and a symmetry axis X2-X2', and may have any suitable shape as required. In this embodiment, the width W of the dimming element 112 is 112 The width W of the adhesive layer 110 110 The ratio of is substantially equal to 1. In some embodiments, in the Z direction, the side surface S of the second portion P2 of the glue layer 110 is 2 It is substantially coplanar with the side surface of the dimming element 112. Furthermore, the optical structure 10E may be a symmetrical structure, for example, having a central axis CC'. The elements of the optical structure 10E may use the central axis CC' as a symmetry axis and have any suitable shape as required.

[0147] Similarly, in this embodiment, the refractive index of the wavelength conversion layer 108 is different from the refractive index of the glue layer 110, and the refractive index of the wavelength conversion layer 108 may be greater than the refractive index of the glue layer 110. In other words, the ratio of the refractive index of the glue layer 110 to the refractive index of the wavelength conversion layer 108 is less than 1. Furthermore, the refractive index of the glue layer 110 may be different from the refractive index of the dimming element 112, and the refractive index of the dimming element 112 may be greater than the refractive index of the glue layer 110. In other words, the ratio of the refractive index of the glue layer 110 to the refractive index of the dimming element 112 is less than 1. This configuration can improve the luminous efficiency of the light-emitting element 106 and improve the light type of the optical structure. In some embodiments, the optical structure 10E may include a bracket 104.

[0148] Next, please refer to Fig. 6A as well as Figure 6B , Fig. 6A Showing a three-dimensional schematic diagram of an optical structure 10F according to some other embodiments of the present invention, Figure 6B In some embodiments of the present invention, corresponding to Fig. 6A Schematic cross-sectional view of the optical structure 10F along the section line A6-A6'.

[0149] The optical structure 10F is substantially similar to the optical structure 10A. Compared with the optical structure 10A, the width Wa of the top surface 110t of the adhesive layer 110 of the optical structure 10F may be greater than the width Wb of the bottom surface 110b. In this embodiment, the dimming element 112 may be a flat plate, and the dimming element 112 may be disposed on the top surface 110t of the adhesive layer 110. In this embodiment, the width Wa of the top surface 110t of the adhesive layer 110 is equal to the width Wb of the dimming element 112. 112 Furthermore, according to some embodiments, the width Wa of the top surface 110 t of the glue layer 110 may be greater than the width W of the wavelength conversion layer 108 . 108 According to some embodiments, the width Wb of the bottom surface 110b of the glue layer 110 may be greater than the width W of the wavelength conversion layer 108. 108 According to some embodiments, the height H of the wavelength conversion layer 108 is 108 It can be less than or equal to the height H of the adhesive layer 110 110 .

[0150] In addition, if Figure 6B As shown, the adhesive layer 110 of the optical structure 10F may further include a first portion P1 and a second portion P2 disposed on the first portion P1. Furthermore, the first portion P1 has a side surface S 1 , the second portion P2 has a side surface S 2 , and the side surface S of the first portion P1 1 The side surface S of the second portion P2 2 Furthermore, the side surface S of the first portion P1 of the adhesive layer 110 is 1 There is an angle θ between the bottom surface 110b of the adhesive layer 110 5 , the side surface S of the second portion P2 of the adhesive layer 110 2 There is an angle θ between the top surface 110t of the adhesive layer 110 6 In this embodiment, the side surface S of the first portion P1 1 The angle θ between the bottom surface 110b of the adhesive layer 110 5 It can be equal to 90 degrees (i.e., the angle θ 5 =90 degrees). In this embodiment, the side surface S of the second portion P22 The angle θ between the top surface 110t of the glue layer 110 6 Can be greater than or equal to 30 degrees and less than 90 degrees (i.e. 30 degrees ≤ angle θ 6 <90 degrees). In this embodiment, the side surface S of the first portion P1 of the adhesive layer 110 1 The side surface S of the second portion P2 of the adhesive layer 110 is substantially perpendicular to the bottom surface 110b. 2 In particular, through the above configuration, the light emitting element 106 can have a larger light emitting angle, which can further improve the light type of the optical structure.

[0151] According to some embodiments, the dimming element 112 may be a symmetrical structure. For example, the dimming element 112 may have a symmetry axis X1-X1' and a symmetry axis X2-X2', and may have any suitable shape as required. In this embodiment, the width W of the dimming element 112 is 112 The width W of the adhesive layer 110 110 The ratio is substantially equal to 1. Furthermore, the optical structure 10F may be a symmetrical structure, for example, having a central axis CC'. The elements of the optical structure 10F may use the central axis CC' as a symmetry axis and have any suitable shape as required.

[0152] Similarly, in this embodiment, the refractive index of the wavelength conversion layer 108 is different from the refractive index of the glue layer 110, and the refractive index of the wavelength conversion layer 108 may be greater than the refractive index of the glue layer 110. In other words, the ratio of the refractive index of the glue layer 110 to the refractive index of the wavelength conversion layer 108 is less than 1. Furthermore, the refractive index of the glue layer 110 may be different from the refractive index of the dimming element 112, and the refractive index of the dimming element 112 may be greater than the refractive index of the glue layer 110. In other words, the ratio of the refractive index of the glue layer 110 to the refractive index of the dimming element 112 is less than 1. This configuration can improve the luminous efficiency of the light-emitting element 106 and improve the light type of the optical structure. In some embodiments, the optical structure 10F may include a bracket 104.

[0153] Next, please refer to Figure 7 , Figure 7 The cross-sectional schematic diagram of the optical structure 10G according to some other embodiments of the present invention is shown. The optical structure 10G is substantially similar to the optical structure 10A. Compared with the optical structure 10A, the wavelength conversion layer 108 of the optical structure 10G has an arc-shaped surface. The wavelength conversion layer 108 can be a hemispherical shape, but the present invention is not limited thereto.

[0154] Similarly, in this embodiment, the refractive index of the wavelength conversion layer 108 is different from the refractive index of the adhesive layer 110, and the refractive index of the wavelength conversion layer 108 may be greater than the refractive index of the adhesive layer 110. In other words, the ratio of the refractive index of the adhesive layer 110 to the refractive index of the wavelength conversion layer 108 is less than 1. This configuration can enhance the luminous efficiency of the light-emitting element 106 and improve the light pattern of the optical structure.

[0155] Similarly, in this embodiment, the width W of the wavelength conversion layer 108 is 108 The width W of the adhesive layer 110 110 The ratio can be greater than 0 and less than or equal to 0.5 (i.e. 0 <W 108 / W 110 ≤0.5), for example, 0.05, 0.1, 0.15, 0.2, 0.25, 0.3, 0.35, 0.4 or 0.45, but not limited thereto. Furthermore, the height H of the wavelength conversion layer 108 108 The height H of the adhesive layer 110 110 The ratio can be greater than 0 and less than or equal to 0.5 (i.e. 0 <H 108 / H 110 ≤0.5), for example, 0.05, 0.1, 0.15, 0.2, 0.25, 0.3, 0.35, 0.4 or 0.45, but not limited thereto. It is worth noting that when the height and width ratio of the wavelength conversion layer 108 to the adhesive layer 110 falls within the above range (0 <W 108 / W 110 ≤0.5 and 0 <H 108 / H 110 ≤0.5), the luminous efficiency of the light emitting element 106 can be effectively improved and the light type of the optical structure can be improved. In some embodiments, the optical structure 10G can include a bracket 104.

[0156] Next, please refer to Figure 8 , Figure 8 The cross-sectional schematic diagram of the optical structure 10H according to some other embodiments of the present invention is shown. The optical structure 10H is substantially similar to the optical structure 10B. Compared with the optical structure 10B, the wavelength conversion layer 108 of the optical structure 10H has an arc-shaped surface. The wavelength conversion layer 108 can be hemispherical, but the present invention is not limited thereto.

[0157] Similarly, in this embodiment, the refractive index of the wavelength conversion layer 108 is different from the refractive index of the adhesive layer 110, and the refractive index of the wavelength conversion layer 108 may be greater than the refractive index of the adhesive layer 110. In other words, the ratio of the refractive index of the adhesive layer 110 to the refractive index of the wavelength conversion layer 108 is less than 1. This configuration can enhance the luminous efficiency of the light-emitting element 106 and improve the light pattern of the optical structure.

[0158] Similarly, in this embodiment, the width W of the wavelength conversion layer 108 is 108 The width W of the adhesive layer 110 110 The ratio can be greater than 0 and less than or equal to 0.5 (i.e. 0 <W 108 / W 110 ≤0.5), for example, 0.05, 0.1, 0.15, 0.2, 0.25, 0.3, 0.35, 0.4 or 0.45, but not limited thereto. Furthermore, the height H of the wavelength conversion layer 108 108 The height H of the adhesive layer 110 110 The ratio can be greater than 0 and less than or equal to 0.5 (i.e. 0 <H 108 / H 110 ≤0.5), for example, 0.05, 0.1, 0.15, 0.2, 0.25, 0.3, 0.35, 0.4 or 0.45, but not limited thereto. It is worth noting that when the height and width ratio of the wavelength conversion layer 108 to the adhesive layer 110 falls within the above range (0 <W 108 / W 110 ≤0.5 and 0 <H 108 / H 110 ≤0.5), the luminous efficiency of the light emitting element 106 can be effectively improved and the light type of the optical structure can be improved. In some embodiments, the optical structure 10H may not include the bracket 104.

[0159] Next, please refer to Fig. 9 , Fig. 9 The cross-sectional schematic diagram of the optical structure 10I according to some other embodiments of the present invention is shown. The optical structure 10I is substantially similar to the optical structure 10C. Compared with the optical structure 10C, the wavelength conversion layer 108 of the optical structure 10I has an arc-shaped surface. The wavelength conversion layer 108 can be hemispherical, but the present invention is not limited thereto.

[0160] Similarly, in this embodiment, the refractive index of the wavelength conversion layer 108 is different from the refractive index of the adhesive layer 110, and the refractive index of the wavelength conversion layer 108 may be greater than the refractive index of the adhesive layer 110. In other words, the ratio of the refractive index of the adhesive layer 110 to the refractive index of the wavelength conversion layer 108 is less than 1. This configuration can enhance the luminous efficiency of the light-emitting element 106 and improve the light pattern of the optical structure.

[0161] Similarly, in this embodiment, the width W of the wavelength conversion layer 108 is 108 The width W of the adhesive layer 110 110 The ratio can be greater than 0 and less than or equal to 0.5 (i.e. 0 <W 108 / W 110≤0.5), for example, 0.05, 0.1, 0.15, 0.2, 0.25, 0.3, 0.35, 0.4 or 0.45, but not limited thereto. Furthermore, the height H of the wavelength conversion layer 108 108 The height H of the adhesive layer 110 110 The ratio can be greater than 0 and less than or equal to 0.5 (i.e. 0 <H 108 / H 110 ≤0.5), for example, 0.05, 0.1, 0.15, 0.2, 0.25, 0.3, 0.35, 0.4 or 0.45, but not limited thereto. It is worth noting that when the height and width ratio of the wavelength conversion layer 108 to the adhesive layer 110 falls within the above range (0 <W 108 / W 110 ≤0.5 and 0 <H 108 / H 110 ≤0.5), the luminous efficiency of the light-emitting element 106 can be effectively improved and the light type of the optical structure can be improved.

[0162] Next, please refer to Fig.10 , Fig.10 The cross-sectional schematic diagram of the optical structure 10J according to some other embodiments of the present invention is shown. The optical structure 10J is substantially similar to the optical structure 10E. Compared with the optical structure 10E, the wavelength conversion layer 108 of the optical structure 10J has an arc-shaped surface. The wavelength conversion layer 108 can be hemispherical, but the present invention is not limited thereto.

[0163] Similarly, in this embodiment, the refractive index of the wavelength conversion layer 108 is different from the refractive index of the adhesive layer 110, and the refractive index of the wavelength conversion layer 108 may be greater than the refractive index of the adhesive layer 110. In other words, the ratio of the refractive index of the adhesive layer 110 to the refractive index of the wavelength conversion layer 108 is less than 1. This configuration can improve the luminous efficiency of the light-emitting element 106 and improve the light type of the optical structure. In some embodiments, the optical structure 10J may include a bracket 104.

[0164] Next, please refer to Fig.11 , Fig.11 A three-dimensional schematic diagram of an optical structure 10K according to some other embodiments of the present invention is shown. The optical structure 10K is substantially similar to the optical structure 10A. Compared with the optical structure 10A, the optical structure 10K further includes a bracket 104, and the area of ​​the dimming element 112 is smaller than the area of ​​the top surface 110t (not shown) of the adhesive layer 110. Furthermore, in this embodiment, the dimming element 112 may be a flat plate, and the dimming element 112 and the adhesive layer 110 have the same shape in the top view, for example, a rectangular shape, but the present invention is not limited thereto. In some embodiments, the optical structure 10K may not include the bracket 104.

[0165] Next, please refer to Fig.12 , Fig.12 A three-dimensional schematic diagram of an optical structure 10L according to some other embodiments of the present invention is shown. The optical structure 10L is substantially similar to the optical structure 10A. Compared with the optical structure 10A, the optical structure 10K further includes a bracket 104, and the area of ​​the dimming element 112 is smaller than the area of ​​the top surface 110t (not shown) of the adhesive layer 110. Furthermore, in this embodiment, the dimming element 112 may be a flat plate, and the dimming element 112 and the adhesive layer 110 may have different shapes in the top view. For example, the dimming element 112 may be an octagon and the adhesive layer 110 may be a rectangle, but the present invention is not limited thereto. In some embodiments, the optical structure 10L may not include the bracket 104.

[0166] Next, please refer to Fig.13 , Fig.13 A three-dimensional schematic diagram of an optical structure 10M according to some other embodiments of the present invention is shown. The optical structure 10M is substantially similar to the optical structure 10B, but the adhesive layer 110 and the dimming element 112 of the optical structure 10M and the optical structure 10B have different shapes. Specifically, in the top view, the adhesive layer 110 and the dimming element 112 of the optical structure 10B may be quadrilaterals, and the adhesive layer 110 and the dimming element 112 of the optical structure 10M may be octagonal, but the present invention is not limited thereto. In some embodiments, the optical structure 10M may not include the bracket 104.

[0167] Next, please refer to Fig.14 , Fig.14 A three-dimensional schematic diagram of an optical structure 10N according to some other embodiments of the present invention is shown. The optical structure 10N is substantially similar to the optical structure 10C, but the dimming elements 112 of the optical structure 10N and the optical structure 10C have different shapes. Specifically, the dimming element 112 of the optical structure 10C may be a flat plate, while the dimming element 112 of the optical structure 10N may be convex; in the top view, the dimming elements 112 of the optical structure 10C and the optical structure 10N are both circular, but the present invention is not limited thereto. In some embodiments, the optical structure 10N may not include the bracket 104.

[0168] Next, please refer to Fig.15 , Fig.15 A three-dimensional schematic diagram of an optical structure 100 according to some other embodiments of the present invention is shown. The optical structure 100 is substantially similar to the optical structure 10N. Compared with the optical structure 10N, the dimming element 112 of the optical structure 100 further has a recess Rs, and the recess Rs may be disposed on the top of the dimming element 112. In some embodiments, the optical structure 100 may not include the bracket 104.

[0169] Next, please refer to Fig.16 , Fig.16 A three-dimensional schematic diagram of an optical structure 10P according to some other embodiments of the present invention is shown. The optical structure 10P is substantially similar to the optical structure 10N. Compared with the optical structure 10N, the adhesive layer 110 of the optical structure 10P further has a recess Rs, and the recess Rs can be disposed on the top of the adhesive layer 110. Furthermore, in this embodiment, the area of ​​the dimming element 112 is smaller than the area of ​​the bottom surface 110b (not shown) of the adhesive layer 110. In other words, the projection of the dimming element 112 on the substrate 102 is smaller than the projection of the adhesive layer 110 on the substrate 102. Furthermore, in this embodiment, the dimming element 112 can be a flat plate, and the dimming element 112 and the adhesive layer 110 can have different shapes in the top view. For example, the dimming element 112 can be a quadrilateral and the adhesive layer 110 can be a circle, but the present invention is not limited thereto. In some embodiments, the optical structure 10P may not include the bracket 104.

[0170] Next, please refer to Fig.17 , Fig.17 A three-dimensional schematic diagram of an optical structure 10Q according to some other embodiments of the present invention is shown. The optical structure 10Q is substantially similar to the optical structure 10N. Compared with the optical structure 10N, the adhesive layer 110 of the optical structure 10Q further has a recess Rs, and the recess Rs can be disposed on the top of the adhesive layer 110. Furthermore, in this embodiment, the area of ​​the dimming element 112 is smaller than the area of ​​the bottom surface 110b (not shown) of the adhesive layer 110. In other words, the projection of the dimming element 112 on the substrate 102 is smaller than the projection of the adhesive layer 110 on the substrate 102. Furthermore, in this embodiment, the dimming element 112 can be a flat plate, and the dimming element 112 and the adhesive layer 110 can have different shapes in the top view. For example, the dimming element 112 can be an octagon and the adhesive layer 110 can be a circle, but the present invention is not limited thereto.

[0171] Next, please refer to Fig.18A , Fig.18B as well as Fig. 18C , Fig.18A A light pattern simulation diagram of an optical structure in a comparative example is shown. Fig.18B as well as Fig.18B Shows a light pattern simulation diagram of an optical structure according to some embodiments of the present invention. Specifically, Fig.18A The light pattern simulation results of the optical structure of Comparative Example 1 (for example, a white light LED in which a light emitting element and a wavelength conversion layer are sealed in a bracket having an inclined surface) (referred to as Comparative Example 1) are shown. Fig.18B Displays the ratio of the width of the wavelength conversion layer to the width of the adhesive layer in the optical structure (W 108 / W 110 ) is 0.25, Fig. 18C Displays the ratio of the width of the wavelength conversion layer to the width of the adhesive layer in the optical structure (W108 / W 110 ) is 0.5. Furthermore, the above results are obtained by simulation using LightTools simulation software. 18A to 18C As shown, compared with Comparative Example 1, when the ratio of the width of the wavelength conversion layer to the width of the adhesive layer (W 108 / W 110 ) is 0.25 or 0.5, the overall light pattern and light spot of the optical structure are larger. Fig.18D , Fig.18D A quantitative curve diagram showing the above light type simulation results. Fig.18D As shown, compared with Comparative Example 1, the ratio of the width of the wavelength conversion layer to the width of the adhesive layer (W 108 / W 110 ) is 0.25 or 0.5, the overall brightness of the optical structure is higher, and it has a larger light pattern and light spot.

[0172] Please refer to Fig.19A as well as Fig.19B , Fig.19A as well as Fig.19B Shows a light pattern simulation diagram of an optical structure according to some embodiments of the present invention. Specifically, Fig.19A Displays the ratio of the width of the wavelength conversion layer to the width of the adhesive layer in the optical structure (W 108 / W 110 ) is 0.25 and the ratio of the height of the wavelength conversion layer to the height of the adhesive layer (H 108 / H 110 ) is 0.3, Fig.19B Displays the ratio of the width of the wavelength conversion layer to the width of the adhesive layer in the optical structure (W 108 / W 110 ) is 0.25 and the ratio of the height of the wavelength conversion layer to the height of the adhesive layer (H 108 / H 110 ) is 0.5. Furthermore, the above results are also the results obtained by simulation using LightTools simulation software. Fig.19A as well as Fig.19B As shown, compared with Comparative Example 1 (please refer to Fig.18A ), when the ratio of the width of the wavelength conversion layer to the width of the adhesive layer (W 108 / W 110 ) is 0.25 and the ratio of the height of the wavelength conversion layer to the height of the adhesive layer (H 108 / H 110 ) is 0.3 or 0.5, the overall light pattern and light spot of the optical structure are larger. Fig.19C , Fig.19C A quantitative curve diagram showing the above light type simulation results. Fig.19C As shown, compared with Comparative Example 1, the ratio of the width of the wavelength conversion layer to the width of the adhesive layer (W 108 / W 110 ) is 0.25 and the ratio of the height of the wavelength conversion layer to the height of the adhesive layer (H 108 / H 110 ) is 0.3 or 0.5, the overall brightness of the optical structure is higher, and it has a larger light pattern and light spot.

[0173] Next, please refer to Fig. 20 , Fig. 20 The comparison results of the brightness distribution of the optical structure according to a comparative example (Comparative Example 1) and an embodiment of the present invention (Embodiment 1) are shown. Specifically, Embodiment 1 is the ratio of the width of the wavelength conversion layer to the width of the adhesive layer in the optical structure (W 108 / W 110 ) is ≤0.5 and the ratio of the height of the wavelength conversion layer to the height of the adhesive layer (H 108 / H 110 ) is ≤0.5. Fig. 20 As shown, compared with Comparative Example 1, the brightness distribution of the optical structure of Example 1 of the present invention is more uniform.

[0174] Next, please refer to Fig.21A as well as Fig. 21B , Fig.21A Showing an image of an actual module in which the optical structure is applied according to a comparative example, Fig. 21B Display according to one embodiment, the optical structure is applied to the image of the actual module. Specifically, Fig.21A The images showing the optical structure of multiple comparative examples 1 applied to the backlight module, Fig. 21B The optical structure of multiple embodiments 1 is applied to the image of the backlight module. Fig.21A as well as Fig. 21B As shown, compared with the optical structure of Comparative Example 1, the backlight module formed by the optical structure of Example 1 has a larger light spot and a more uniform quality of the module.

[0175] Next, please refer to Fig.22A as well as Fig. 22B , Fig.22A The light pattern simulation diagram of the optical structure according to a comparative example (Comparative Example 2) and an embodiment of the present invention (Embodiment 2) is shown. Fig. 22B The comparison results of the brightness distribution of the optical structure according to a comparative example (Comparative Example 2) and an embodiment of the present invention (Example 2) are shown. Specifically, Comparative Example 2 is the light type simulation result of the existing optical structure (for example, a white light LED with a rectangular wavelength conversion layer wrapped around a light-emitting element on a bracket), and the optical structure of Example 2 is as follows Fig. 6A As shown in the structure. Fig.22A As shown, compared with Comparative Example 2, the overall brightness of the optical structure of Example 2 is higher, and it has a larger light pattern and light spot. Fig. 22B As shown, compared with Comparative Example 2, the brightness distribution of the optical structure of Example 2 of the present invention is more uniform.

[0176] Please refer to Fig.23 , Fig.23 The cross-sectional schematic diagram of the optical structure 10R according to some other embodiments of the present invention is shown. Fig.23 As shown, the optical structure 10R may include a substrate 102, a light emitting element 106, a glue layer 110, and a dimming element 112. The optical structure 10R may not have a wavelength conversion layer. The light emitting element 106 may be disposed on the substrate 102. The glue layer 110 may cover the light emitting element 106. Specifically, the glue layer 110 may contact the top surface 106t and the side surface 106s of the light emitting element 106. Furthermore, the dimming element 112 may be disposed on the glue layer 110, and the dimming element 112 may contact the glue layer 110.

[0177] In this embodiment, the dimming element 112 is disposed on the adhesive layer 110, and the adhesive layer 110 may have an arc-shaped surface. The adhesive layer 110 may be semi-spherical, but the present invention is not limited thereto. In this embodiment, the height H of the adhesive layer 110 is 110 The width W of the adhesive layer 110 110 The ratio can be greater than 0 and less than or equal to 0.5 (i.e. 0 <H 110 / W 110 ≤0.5), for example, 0.05, 0.1, 0.15, 0.2, 0.25, 0.3, 0.35, 0.4 or 0.45, but not limited thereto. Furthermore, the side surface 110s of the adhesive layer 110 and the bottom surface 110b have an included angle θ 7 , and the angle θ between the side surface 110s and the bottom surface 110b of the glue layer 110 7 Can be less than or equal to 90 degrees (i.e. angle θ 7 ≤90 degrees). In this embodiment, the side surface 110s of the adhesive layer 110 is a curved surface. In detail, according to the embodiment of the present invention, the angle θ 7 It refers to the angle between the tangent line of the side surface (curved surface) 110s of the glue layer 110 and the bottom surface 110b.

[0178] Furthermore, the dimming element 112 may have a height H 112 In this embodiment, the height H of the dimming element 112 is 112 It may be between 10 μm and 300 μm, or between 50 μm and 250 μm, for example, 100 μm, 150 μm or 200 μm, but not limited thereto. Fig.23As shown, the dimming element 112 partially covers the adhesive layer 110, and the dimming element 112 covers the adhesive layer 110 at an angle θ 8 Can be less than or equal to 135 degrees (i.e. angle θ 8 ≤135 degrees).

[0179] It is worth noting that the height of the dimming element 112 and the area of ​​the adhesive layer 110 covered by the dimming element 112 will affect the light pattern of the light emitting element 106. Specifically, when the area of ​​the dimming element 112 covering the adhesive layer 110 is too small, the light emitting angle may be too small. On the contrary, when the area of ​​the dimming element 112 covering the adhesive layer 110 is too large (for example, the angle θ 8 >135 degrees), the luminous flux may be reduced, thereby affecting the luminous efficiency of the light-emitting element 106.

[0180] In this embodiment, the width W of the dimming element 112 is 112 The width W of the adhesive layer 110 110 The ratio is greater than 0 and less than 1. In this embodiment, the refractive index of the adhesive layer 110 may be different from the refractive index of the dimming element 112, and the refractive index of the dimming element 112 may be less than the refractive index of the adhesive layer 110. Furthermore, the optical structure 10R may be a symmetrical structure, for example, having a central axis C-C', and the elements of the optical structure 10R may use the central axis C-C' as a symmetry axis and have any suitable shape according to requirements. In some embodiments, the optical structure 10R may include a bracket 104.

[0181] Next, please refer to Fig.24 , Fig.24 The cross-sectional schematic diagram of the optical structure 10X according to some other embodiments of the present invention is shown. The optical structure 10X is substantially similar to the optical structure 10R. Compared with the optical structure 10R, the adhesive layer 110 of the optical structure 10X is non-spherical, for example, non-hemispherical. In detail, the top surface 110t of the adhesive layer 110 of the optical structure 10X is substantially flat, and the dimming element 112 can be disposed on the top surface 110t of the adhesive layer 110, so the dimming element 112 can be in the shape of a flat plate.

[0182] In this embodiment, the height H of the adhesive layer 110 is 110 The width W of the adhesive layer 110 110 The ratio can be greater than 0 and less than or equal to 1 (i.e. 0 <H 110 / W 110 ≤1), for example, 0.1, 0.2, 0.3, 0.4, 0.5, 0.6, 0.7, 0.8 or 0.9, but not limited thereto. Furthermore, the side surface 110s of the adhesive layer 110 and the bottom surface 110b have an included angle θ 9 , and the angle θ between the side surface 110s and the bottom surface 110b of the glue layer 110 9Can be less than or equal to 90 degrees (i.e. angle θ 9 ≤90 degrees). In this embodiment, the side surface 110s of the adhesive layer 110 is a curved surface. In detail, according to the embodiment of the present invention, the angle θ 9 It refers to the angle between the tangent line of the side surface (curved surface) 110s of the glue layer 110 and the bottom surface 110b.

[0183] Furthermore, the dimming element 112 may have a height H 112 , the height H of the dimming element 112 112 It may be between 10 μm and 300 μm, or between 50 μm and 250 μm, for example, 100 μm, 150 μm or 200 μm, but not limited thereto. Fig.24 As shown, the dimming element 112 partially covers the adhesive layer 110, and the width W of the dimming element 112 is 112 The width W of the adhesive layer 110 110 The ratio can be greater than 0 and less than or equal to 1 (i.e. 0 <W 112 / W 110 ≤1).

[0184] It is worth noting that the height of the dimming element 112 and the area of ​​the adhesive layer 110 covered by the dimming element 112 will affect the light pattern of the light emitting element 106. Specifically, when the area of ​​the dimming element 112 covering the adhesive layer 110 is too small, the light emitting angle may be too small; on the contrary, when the area of ​​the dimming element 112 covering the adhesive layer 110 is too large (for example, W 112 / W 110 >1), the luminous flux may be reduced, thereby affecting the luminous efficiency of the light-emitting element 106.

[0185] Similarly, in this embodiment, the refractive index of the adhesive layer 110 may be different from the refractive index of the dimming element 112, and the refractive index of the dimming element 112 may be less than the refractive index of the adhesive layer 110. Furthermore, the optical structure 10X may be a symmetrical structure, for example, having a central axis C-C', and the elements of the optical structure 10X may use the central axis C-C' as a symmetry axis and have any suitable shape according to requirements. In some embodiments, the optical structure 10X may include a bracket 104. Next, please refer to Fig.25 , Fig.25 The comparison results of the brightness distribution of the optical structure according to a comparative example (Comparative Example 3) and some embodiments of the present invention (Example 3-1, Example 3-2) are shown. Specifically, Comparative Example 3 is the brightness distribution result of the existing optical structure (for example, a hemispherical white light LED without a dimming element), and Example 3-1 corresponds to Fig.23 The optical structure shown in Example 3-2 corresponds to Fig.24 The optical structure shown. Fig.25As shown, compared with Comparative Example 3, the light emitting angles of the optical structures of Embodiments 3-1 and 3-2 are larger, and the brightness uniformity is better when applied to the backlight module.

[0186] Next, please refer to Fig.26A , Fig.26B , Fig.27A , Fig.27B , Fig.28A as well as Fig.28B , Fig.26A as well as Fig.26B The light spot image of the optical structure and the image applied to the actual module in a comparative example (Comparative Example 3) are respectively shown. Fig.27A as well as Fig.27B The light spot image of the optical structure and the image applied to the actual module according to an embodiment (embodiment 3-1) are respectively displayed, and Fig.28A as well as Fig.28B The light spot image of the optical structure according to another embodiment (Embodiment 3-2) and the image applied to the actual module are respectively shown.

[0187] From the above results, it can be seen that the optical structures of Examples 3-1 and 3-2 have larger light spots and more uniform brightness distribution compared to Comparative Example 3. Furthermore, compared to the optical structure of Comparative Example 3, the backlight module formed by the optical structures of Examples 3-1 and 3-2 has a larger light spot and a more uniform module quality.

[0188] Next, please refer to Fig.29 , Fig.29 The cross-sectional schematic diagram of the optical structure 10Y according to some other embodiments of the present invention is shown. Fig.29 As shown, the optical structure 10Y may include a substrate 102, a light emitting element 106, a wavelength conversion layer 108, a glue layer 110, and an optical component 200. The light emitting element 106 may be disposed on the substrate 102. The wavelength conversion layer 108 may be disposed on the light emitting element 106, and the wavelength conversion layer 108 may be in contact with the top surface 106t of the light emitting element 106. The glue layer 110 may cover the wavelength conversion layer 108. Specifically, the glue layer 110 may be in contact with the top surface 108t and the side surface 108s of the wavelength conversion layer 108, and the glue layer 110 may be in contact with the side surface 106s of the light emitting element 106. Furthermore, the optical component 200 may be disposed corresponding to the glue layer 110, for example, the optical component 200 may overlap with the glue layer 110.

[0189] According to some embodiments, the optical component 200 may include a diffusion film 200a, a wavelength conversion film 200b disposed on the diffusion film 200a, and a brightness enhancement film 200c disposed on the wavelength conversion film 200b. In some embodiments, the wavelength conversion film 200b may be a quantum dot film or a phosphor layer. It is worth noting that a comparative example (for example, comparative example 4 described below) having a reflective film disposed above the light emitting element Fig.29 In a similar structure but with the wavelength conversion layer 108 replaced by a reflective layer), when the light emitting element 106 is blue light, since the light is converted by the wavelength conversion film only once, it is easy to cause uneven color conversion, resulting in the display image being partially blue and partially yellow, with blue halo and yellow halo phenomena. According to an embodiment of the present invention, after the wavelength conversion layer 108 on the light emitting element 106 performs the first wavelength conversion, the wavelength conversion film 200b disposed above the adhesive layer 110 performs the second wavelength conversion, which can not only maintain a larger light emitting angle, but also effectively improve the blue halo and yellow halo phenomena when applied to the module.

[0190] Furthermore, in this embodiment, the refractive index of the wavelength conversion layer 108 is different from the refractive index of the adhesive layer 110, and the refractive index of the wavelength conversion layer 108 may be greater than the refractive index of the adhesive layer 110. In other words, the ratio of the refractive index of the adhesive layer 110 to the refractive index of the wavelength conversion layer 108 is less than 1. This configuration can enhance the luminous efficiency of the light emitting element 106 and improve the light pattern of the optical structure.

[0191] In this embodiment, the adhesive layer 110 may have an arc-shaped surface. The adhesive layer 110 may be in a semi-spherical shape, but the present invention is not limited thereto. In this embodiment, the height H of the adhesive layer 110 is 110 The width W of the adhesive layer 110 110 The ratio can be greater than 0 and less than or equal to 0.5 (i.e. 0 <H 110 / W 110 ≤0.5), for example, 0.05, 0.1, 0.15, 0.2, 0.25, 0.3, 0.35, 0.4 or 0.45, but not limited thereto. Furthermore, in this embodiment, the width W of the wavelength conversion layer 108 is 108 The width W of the light emitting element 106 106 The ratio can be between 0.5 and 2 (i.e. 0.5≤W 108 / W 106 ≤2), for example, 0.6, 0.7, 0.8, 0.9, 1, 1.1, 1.2, 1.3, 1.4, 1.5, 1.6, 1.7, 1.8 or 1.9, but not limited thereto.

[0192] In addition, the optical structure 10Y may be a symmetrical structure, for example, having a central axis CC′. The elements of the optical structure 10Y may use the central axis CC′ as a symmetry axis and may have any suitable shape as required.

[0193] According to some embodiments, the light emitting element 106 may be a light emitting diode that emits blue light, and the wavelength conversion layer 108 may include yellow phosphor, so that the optical structure 10Y can emit white light, but the present invention is not limited thereto. According to other embodiments, the light emitting element 106 may be a light emitting diode that emits blue light, but may not have the wavelength conversion layer 108, so that the optical structure 10Y can emit blue light.

[0194] Next, please refer to Fig.30 , Fig.30 The cross-sectional schematic diagram of the optical structure 10Z according to some other embodiments of the present invention is shown. The optical structure 10Z is substantially similar to the optical structure 10Y. Compared with the optical structure 10Y, the optical component 200 of the optical structure 10Z may include a wavelength conversion diffusion film 200a' and a brightness enhancement film 200c disposed on the wavelength conversion diffusion film 200a'. Similarly, after the wavelength conversion layer 108 on the light-emitting element 106 performs the first wavelength conversion, the wavelength conversion diffusion film 200a' disposed on the adhesive layer 110 performs the second wavelength conversion. In addition to maintaining a larger light-emitting angle, it can also effectively improve the blue halo and yellow halo phenomenon when applied to the module.

[0195] Furthermore, compared with the optical structure 10Y, the optical structure 10Z further includes a dimming element 112. The dimming element 112 may be disposed on the adhesive layer 110 and may be located between the adhesive layer 110 and the optical component 200. The dimming element 112 may have a height H 112 , the height H of the dimming element 112 112 The thickness may be between 10 μm and 300 μm, or between 50 μm and 250 μm, for example, 100 μm, 150 μm or 200 μm, but is not limited thereto.

[0196] Next, please refer to Fig.31 , Fig.31 According to some other embodiments of the present invention, a cross-sectional schematic diagram of an optical structure 11A is shown. The optical structure 11A is substantially similar to the optical structure 10Y. Compared with the optical structure 10Y, the adhesive layer 110 of the optical structure 11A has multiple curved surfaces, for example, two protrusions. Furthermore, the adhesive layer 110 of the optical structure 11A may further have a recess Rs, and the recess Rs may be set at the top of the adhesive layer 110.

[0197] Next, please refer to Fig.32 , Fig.32The cross-sectional schematic diagram of the optical structure 11B according to some other embodiments of the present invention is shown. The optical structure 11B is substantially similar to the optical structure 11A. Compared with the optical structure 11A, the optical structure 11B may further include a dimming element 112. The dimming element 112 may be disposed on the adhesive layer 110 and may be located between the adhesive layer 110 and the optical component 200. Furthermore, the dimming element 112 may be disposed on the recess Rs and overlap with the recess Rs.

[0198] Next, please refer to Fig.33 , Fig.33 The cross-sectional schematic diagram of the optical structure 11C according to some other embodiments of the present invention is shown. The optical structure 11C is substantially similar to the optical structure 10Y. Compared with the optical structure 10Y, the side surface 108s of the wavelength conversion layer 108 of the optical structure 11C is not coplanar with the side surface 106s of the optical element 106. In detail, the side surface 108s of the wavelength conversion layer 108 of the optical structure 11C may protrude from the side surface 106s of the optical element 106, and the wavelength conversion layer 108 may contact the side surface 106s and the top surface 106t of the optical element 106. The wavelength conversion layer 108 may partially cover the side surface 106s of the optical element 106.

[0199] Next, please refer to Fig.34 , Fig.34 According to some other embodiments of the present invention, a cross-sectional schematic diagram of an optical structure 11D is shown. The optical structure 11D is substantially similar to the optical structure 10Y. Compared with the optical structure 10Y, the wavelength conversion layer 108 of the optical structure 11D can contact the side surface 106s and the top surface 106t of the optical element 106, and the wavelength conversion layer 108 can completely cover the side surface 106s and the top surface 106t of the optical element 106.

[0200] Next, please refer to Fig.35 , Fig.35 The cross-sectional schematic diagram of the optical structure 11E according to some other embodiments of the present invention is shown. The optical structure 11E is substantially similar to the optical structure 10Y. Compared with the optical structure 10Y, the adhesive layer 110 of the optical structure 11E has a right-angle profile, and the adhesive layer 110 can be a cuboid or a cube.

[0201] Next, please refer to Fig.36 , Fig.36 A cross-sectional schematic diagram of an optical structure 11F is shown according to some other embodiments of the present invention. The optical structure 11F is substantially similar to the optical structure 11E. Compared with the optical structure 11E, the optical structure 11F may further include a dimming element 112. The dimming element 112 may be disposed on the adhesive layer 110 and may be located between the adhesive layer 110 and the optical component 200.

[0202] Next, please refer to Fig.37 , Fig.37 The cross-sectional schematic diagram of the optical structure 11G according to some other embodiments of the present invention is shown. The optical structure 11G is substantially similar to the optical structure 10Y. Compared with the optical structure 10Y, the wavelength conversion layer 108 of the optical structure 11G has an arc-shaped surface, and the wavelength conversion layer 108 can be semi-spherical. Furthermore, the wavelength conversion layer 108 of the optical structure 11G can contact the side surface 106s and the top surface 106t of the optical element 106, and the wavelength conversion layer 108 can completely cover the side surface 106s and the top surface 106t of the optical element 106.

[0203] Next, please refer to Fig.38 , Fig.38 A cross-sectional schematic diagram of an optical structure 11H is shown according to some other embodiments of the present invention. The optical structure 11H is substantially similar to the optical structure 11G. Compared with the optical structure 11G, the optical structure 11H may further include a dimming element 112. The dimming element 112 may be disposed on the adhesive layer 110 and may be located between the adhesive layer 110 and the optical component 200.

[0204] Next, please refer to Fig.39 , Fig.39 The cross-sectional schematic diagram of the optical structure 11I according to some other embodiments of the present invention is shown. The optical structure 11I is substantially similar to the optical structure 10Y. Compared with the optical structure 10Y, the wavelength conversion layer 108 of the optical structure 11I has an arc-shaped surface, and the wavelength conversion layer 108 can be a semi-spherical shape. The wavelength conversion layer 108 of the optical structure 11I can contact the side surface 106s and the top surface 106t of the optical element 106, and the wavelength conversion layer 108 can completely cover the side surface 106s and the top surface 106t of the optical element 106. Furthermore, the adhesive layer 110 of the optical structure 11I has a right-angle profile, and the adhesive layer 110 can be a rectangular parallelepiped or a cube.

[0205] Next, please refer to Fig.40 , Fig.40 According to some other embodiments of the present invention, a cross-sectional schematic diagram of an optical structure 11J is shown. The optical structure 11J is substantially similar to the optical structure 11I. Compared with the optical structure 11I, the optical structure 11J may further include a dimming element 112. The dimming element 112 may be disposed on the adhesive layer 110 and may be located between the adhesive layer 110 and the optical component 200.

[0206] Next, please refer to Fig.41 , Fig.41The cross-sectional schematic diagram of the optical structure 11K according to some other embodiments of the present invention is shown. The optical structure 11K is substantially similar to the optical structure 10Y. Compared with the optical structure 10Y, the wavelength conversion layer 108 of the optical structure 11K has a curved surface, and the wavelength conversion layer 108 may be semi-spherical. The wavelength conversion layer 108 of the optical structure 11K may contact the side surface 106s and the top surface 106t of the optical element 106, and the wavelength conversion layer 108 may completely cover the side surface 106s and the top surface 106t of the optical element 106. Furthermore, the adhesive layer 110 of the optical structure 11K also has a curved surface, for example, has two protrusions, and the adhesive layer 110 of the optical structure 11A may further have a recess Rs, and the recess Rs may be disposed on the top of the adhesive layer 110.

[0207] Next, please refer to Fig.42 , Fig.42 According to some other embodiments of the present invention, a cross-sectional schematic diagram of an optical structure 11L is shown. The optical structure 11L is substantially similar to the optical structure 11K. Compared with the optical structure 11K, the optical structure 11L may further include a dimming element 112. The dimming element 112 may be disposed on the adhesive layer 110 and may be located between the adhesive layer 110 and the optical component 200. Furthermore, the dimming element 112 may be disposed on the recess Rs and overlap with the recess Rs.

[0208] Please refer to Fig.43A , Fig.43B , Fig.44A as well as Fig.44B , Fig.43A as well as Fig.43B The light spot image of the optical structure according to a comparative example (Comparative Example 4) and the image applied to the actual module are respectively shown. Fig.44A as well as Fig.44B The light spot image of the optical structure according to an embodiment (Example 4) and the image applied to the actual module are respectively shown. Specifically, Comparative Example 4 is the result of the existing optical structure (for example, a hemispherical white light LED with a reflective film above the light emitting element), and Example 4 is the result corresponding to Fig.29 Results for the optical configuration are shown.

[0209] It can be seen from the above results that, compared with Comparative Example 4, the blue halo of the optical structure of Example 4 is smaller, and the blue halo and yellow halo phenomena are significantly improved when applied to the module, and the quality of the module is more uniform.

[0210] As mentioned above, according to the embodiments of the present invention, the optical structure can be applied to the backlight module. The following will describe the application of the optical structure to the backlight module according to some embodiments. It should be understood that the drawings do not illustrate the application of all the aforementioned optical structures to the backlight module, but the optical structures of the embodiments of the present invention can be configured in a similar manner.

[0211] Please refer to Fig.45 , Fig.45 A schematic diagram of a backlight module 1 according to some embodiments of the present invention is shown. Fig.45 As shown, the backlight module 1 may include a substrate 102 and a plurality of optical structures 10 disposed on the substrate 102. In this embodiment, the optical structures 10 may be Figure 1A The optical structure 10A shown. The optical structure 10 may be arranged in an array, for example, arranged at a first pitch (not shown) in the X direction and arranged at a second pitch (not shown) in the Y direction, and the first pitch may be the same as or different from the second pitch. Furthermore, in this embodiment, the light emitting element 106 may be a light emitting diode that emits blue light, the wavelength conversion layer 108 may include yellow phosphor, and the optical structure 10 may emit white light. In addition, the optical component 200 (not shown) may be further disposed above the optical structure 10, and the optical component 200 may include a diffusion film 200a (not shown) and a brightness enhancement film 200c (not shown) disposed on the diffusion film 200a, but is not limited thereto.

[0212] Next, please refer to Fig.46 , Fig.46 Schematic diagrams showing backlight modules 2 according to other embodiments of the present invention. Fig.46 As shown, the backlight module 2 may include a substrate 102 and a plurality of optical structures 10 disposed on the substrate 102. In this embodiment, the optical structures 10 have the following Figure 3A The optical structure 10C shown in FIG. 1 may not have the bracket 104. Similarly, the optical structures 10 may be arranged in an array, for example, arranged at a first pitch (not shown) in the X direction and arranged at a second pitch (not shown) in the Y direction, and the first pitch may be the same as or different from the second pitch. Furthermore, in this embodiment, the light-emitting element 106 may be a light-emitting diode that emits blue light, the wavelength conversion layer 108 may include yellow phosphor, and the optical structure 10 may emit white light. In addition, the optical component 200 (not shown) may be further disposed above the optical structure 10, and the optical component 200 may include a diffusion film 200a (not shown) and a brightness enhancement film 200c (not shown) disposed on the diffusion film 200a, but is not limited thereto.

[0213] Next, please refer to Fig.47 , Fig.47 A schematic diagram of a backlight module 3 according to some other embodiments of the present invention is shown. Fig.47 As shown, the backlight module 3 may include a substrate 102 and a plurality of optical structures 10 disposed on the substrate 102. In this embodiment, the optical structures 10 have the following Fig. 9The optical structure 10I shown in FIG. 1 may not have the bracket 104. Similarly, the optical structure 10 may be arranged in an array, for example, arranged at a first pitch (not shown) in the X direction and arranged at a second pitch (not shown) in the Y direction, and the first pitch may be the same as or different from the second pitch. Furthermore, in this embodiment, the light-emitting element 106 may be a light-emitting diode that emits blue light, the wavelength conversion layer 108 may include yellow phosphor, and the optical structure 10 may emit white light. In addition, the optical component 200 (not shown) may be further disposed above the optical structure 10, and the optical component 200 may include a diffusion film 200a (not shown) and a brightness enhancement film 200c (not shown) disposed on the diffusion film 200a, but is not limited thereto.

[0214] Next, please refer to Fig.48 , Fig.48 Schematic diagrams showing backlight modules 4 according to other embodiments of the present invention. Fig.48 As shown, the backlight module 4 may include a substrate 102 and a plurality of optical structures 10 disposed on the substrate 102. In this embodiment, the optical structures 10 have the following Fig.23 The optical structure 10R shown. Similarly, the optical structure 10 can be arranged in an array, for example, arranged at a first pitch (not shown) in the X direction and arranged at a second pitch (not shown) in the Y direction, and the first pitch can be the same as or different from the second pitch. Furthermore, in this embodiment, the light-emitting element 106 can be a light-emitting diode that emits blue light, and the optical structure 10 can emit blue light. In addition, the optical component 200 (not shown) can be further disposed above the optical structure 10, and the optical component 200 can include a diffusion film 200a (not shown), a wavelength conversion film 200b (not shown) disposed on the diffusion film 200a, and a brightness enhancement film 200 (not shown) disposed on the wavelength conversion film 200b, but is not limited thereto. In some embodiments, the wavelength conversion film 200b can be a quantum dot film. In some embodiments, the wavelength conversion film 200b can be a yellow quantum dot film. In some embodiments, the wavelength conversion film 200b can be a red and green quantum dot film. In some embodiments, the wavelength conversion film 200b may be a yellow phosphor. For example, the yellow phosphor may be a yttrium aluminum garnet (YAG) phosphor. In some embodiments, the wavelength conversion film 200b may include a green phosphor and a red phosphor. For example, the wavelength conversion film 200b may include a green sialon phosphor and a red K 2 SiF 6 :Mn 4+ In some embodiments, the wavelength conversion film 200b may include a combination of green phosphor and two red phosphors. For example, the wavelength conversion film 200b may include a green SiAlON phosphor, a red K 2 SiF 6 :Mn 4+ With red (Sr,Ca)AlSiN3 :Eu 2+ .

[0215] Next, please refer to Fig.49 , Fig.49 Schematic diagrams showing backlight modules 5 according to other embodiments of the present invention. Fig.49 As shown, the backlight module 5 may include a substrate 102 and a plurality of optical structures 10 disposed on the substrate 102. In this embodiment, the optical structures 10 have the following Figure 4A The optical structure 10D shown in the figure may further have a bracket 104. Similarly, the optical structure 10 may be arranged in an array, for example, arranged at a first pitch (not shown) in the X direction and arranged at a second pitch (not shown) in the Y direction, and the first pitch may be the same as or different from the second pitch. Furthermore, in this embodiment, the light emitting element 106 may be a light emitting diode that emits blue light, the wavelength conversion layer 108 may include yellow phosphor, and the optical structure 10 may emit white light. In addition, the optical component 200 (not shown) may be further disposed above the optical structure 10, and the optical component 200 may include a diffusion film 200a (not shown) and a brightness enhancement film 200c (not shown) disposed on the diffusion film 200a, but is not limited thereto.

[0216] In summary, the optical structure provided by the embodiments of the present invention includes a wavelength conversion layer and an adhesive layer configured in a specific size ratio, thereby improving the luminous efficiency and luminous angle of the light-emitting element, thereby reducing the production cost when applied to the module. According to some embodiments, the optical structure can increase the intensity of the lateral light source and enhance the effect of light source reflection. According to some further embodiments, the optical structure includes a dimming layer and an adhesive layer configured in a specific size ratio, thereby improving the luminous efficiency and luminous angle of the light-emitting element. According to some further embodiments, the optical structure includes an optical component that can additionally perform wavelength conversion, thereby maintaining a large-angle light type and effectively improving the blue halo and yellow halo phenomena.

[0217] Although the embodiments of the present invention and its advantages have been disclosed as above, it should be understood that any person of ordinary skill in the art can make changes, substitutions and modifications without departing from the spirit and scope of the present invention. The features between the embodiments of the present invention can be mixed and matched as needed as long as they do not violate the spirit of the invention or conflict with each other. In addition, the scope of protection of the present invention is not limited to the manufacturing process, machine, manufacturing, material composition, device, method and steps in the specific embodiments described in the specification. Any person of ordinary skill in the art can understand the current or future developed manufacturing process, machine, manufacturing, material composition, device, method and steps from the disclosure of the present invention. As long as the same functions can be implemented in the embodiments described herein or the same results can be obtained, they can be used according to the present invention. Therefore, the scope of protection of the present invention includes the above-mentioned manufacturing process, machine, manufacturing, material composition, device, method and steps. The scope of protection of the present invention shall be subject to the definition of the attached claims. Any embodiment or claim of the present invention does not need to achieve all the purposes, advantages and features disclosed in the present invention.

Claims

1. An optical structure comprising: substrate; A light emitting element is disposed on the substrate; An adhesive layer, covering the light emitting element; as well as A dimming element is disposed on the adhesive layer. The refractive index of the adhesive layer is different from the refractive index of the light modulating element.

2. The optical structure of claim 1, further comprising: The wavelength conversion layer covers the light emitting element, and the refractive index of the wavelength conversion layer is different from the refractive index of the adhesive layer.

3. The optical structure as claimed in claim 1, wherein the light modulating element is partially reflective and partially transmissive.

4. The optical structure of claim 1, further comprising: The bracket is arranged between the substrate and the light emitting element. The optical structure as claimed in claim 1 , wherein the light modulating element has a curved surface. 6 . The optical structure as claimed in claim 1 , wherein a ratio of the height to the width of the adhesive layer is greater than 0 and less than or equal to 0.

5. 7 . The optical structure as claimed in claim 1 , wherein the adhesive layer is semi-spherical, the dimming element partially covers the adhesive layer, and the dimming element covers the adhesive layer at an angle less than or equal to 135 degrees.

8. An optical structure comprising: substrate; A light emitting element is disposed on the substrate; A wavelength conversion layer covering the light emitting element; An adhesive layer covering the wavelength conversion layer; as well as A dimming element is disposed on the adhesive layer. The refractive index of the wavelength conversion layer is greater than the refractive index of the adhesive layer, and the width of the top surface of the adhesive layer is greater than the width of the bottom surface.

9. An optical structure comprising: substrate; A light emitting element is disposed on the substrate; A wavelength conversion layer is disposed on the light emitting element; An adhesive layer covering the wavelength conversion layer; as well as Optical components, corresponding to the adhesive layer settings, The refractive index of the wavelength conversion layer is greater than the refractive index of the adhesive layer. 10 . The optical structure of claim 9 , wherein a ratio of the height to the width of the adhesive layer is greater than 0 and less than or equal to 0.5.

Images