Electronic device

Abstract

The present application provides an electronic device, which is characterized in that the electronic device comprises a panel; and a backlight module arranged relative to the panel and comprising a light guide plate; a first optical component arranged on the light guide plate and having a first prism structure; a second optical component arranged on the first optical component and having a second prism structure; and a third optical component arranged on the second optical component and having a third prism structure; wherein the first prism structure faces the light guide plate, and the second prism structure and the third prism structure face the panel.

Description

TECHNICAL FIELD

[0001] The present application relates to a backlight module and an electronic device comprising the same, in particular to an electronic device comprising a backlight module with specially designed optical components. BACKGROUND

[0002] With the continuous development of technology, electronic devices are designed towards privacy, low power consumption, high quality or low cost. Nowadays, the privacy effect is usually achieved by attaching a privacy sheet to the electronic device or using a collimated backlight module. However, the above-mentioned methods still have the disadvantages of high power consumption, high cost or low yield.

[0003] Therefore, there is a need to provide a new backlight module and / or electronic device to improve the above-mentioned defects. SUMMARY

[0004] The present application provides an electronic device, comprising: a panel; and a backlight module disposed relative to the panel, and comprising: a light guide plate; a first optical component disposed on the light guide plate and having a first prism structure; a second optical component disposed on the first optical component and having a second prism structure; and a third optical component disposed on the second optical component and having a third prism structure; wherein the first prism structure faces the light guide plate, and the second prism structure and the third prism structure face the panel.

[0005] The present application also provides an electronic device, comprising: a panel; and a backlight module disposed relative to the panel, and comprising: a light guide plate; a first optical component disposed on the light guide plate; a second optical component disposed on the first optical component; and a third optical component disposed on the second optical component and having a third prism structure and a surface opposite to the third prism structure; wherein the third prism structure comprises a plurality of sharp corner portions and a plurality of rounded corner portions, one of the plurality of rounded corner portions is disposed between two adjacent sharp corner portions, and in the direction of the normal line of the panel, the height of one of the rounded corner portions to the surface of the third optical component is less than the height of one of the sharp corner portions to the surface of the third optical component. BRIEF DESCRIPTION OF DRAWINGS

[0006] Figure 1 A cross-sectional view of an electronic device according to an embodiment of the present application.

[0007] Figure 2 A perspective view of an electronic device according to an embodiment of the present application.

[0008] Figure 3A AndFigure 3B Partial view of an electronic device according to an embodiment of the present application.

[0009] Figures 4A-4D Optical analysis results of an electronic device according to an embodiment of the present application in different backlight module states.

[0010] Figure 5 Cross-sectional view of an electronic device according to an embodiment of the present application.

[0011] Figure 6 Cross-sectional view of an electronic device according to an embodiment of the present application.

[0012] Figure 7 Cross-sectional view of an electronic device according to an embodiment of the present application.

[0013] Figure 8 Cross-sectional view of an electronic device according to an embodiment of the present application.

[0014] Figure 9 Cross-sectional view of an electronic device according to an embodiment of the present application.

[0015] Figure 10A Partial view of an electronic device according to an embodiment of the present application.

[0016] Figure 10B Cross-sectional view of a line segment I-I' of Figure 10A

[0017] Figure 11 Schematic view of a third optical component according to an embodiment of the present application.

[0018]

BRIEF DESCRIPTION OF DRAWINGS

[0019] 100 - panel

[0020] 200 - backlight module

[0021] 10 - light guide plate

[0022] 11 - first optical component

[0023] 111 - first prism structure

[0024] 111a - first strip structure

[0025] 111b - surface

[0026] 12 - second optical component

[0027] 121 - second prism structure

[0028] 121a - second strip structure

[0029] 121b - surface​

[0030] 13 - third optical component

[0031] 131 - third prismatic structure

[0032] 131a - third strip structure

[0033] 131b - surface

[0034] 14 - diffusion component

[0035] 14-1 - diffusion component

[0036] 16 - grating component

[0037] 17 - reflective compound layer

[0038] 20 - light source

[0039] 201 - light emitting component

[0040] 30 - adhesive layer

[0041] 40 - reflective structure

[0042] 401 - light absorbing layer

[0043] 402 - fourth optical component

[0044] 402b - surface

[0045] 4021 - fourth prismatic structure

[0046] 4021a - fourth strip structure

[0047] S1 - sharp corner strip structure

[0048] S2 - rounded corner strip structure

[0049] P1 - sharp corner portion

[0050] P2 - rounded corner portion

[0051] T1, T2 - top end

[0052] e1, e2 - top edge

[0053] H1 - height difference

[0054] R - radius of curvature

[0055] PI - pitch

[0056] θ1 - first top angle

[0057] θ2 - second top angle

[0058] θ3 - third top angle

[0059] θ4 - fourth vertex angle

[0060] θ5 - fifth vertex angle

[0061] X - direction

[0062] Y - first direction

[0063] Z - top-down direction

[0064] F1 - frame

[0065] F2 - support frame

[0066] CB - circuit board

[0067] 126 - reflection assembly

[0068] θ - tilt angle

[0069] - azimuth angle

[0070] ES - light entry surface

[0071] BS - opposite surface DETAILED DESCRIPTION

[0072] The present application is herein described, by way of example only, with the

[0073] It should be noted that, in this document, unless specifically indicated otherwise, a component having "a" is not limited to having only one of that component, but can have one or more of that component. Further, the use of ordinal terms, such as "first" and "second", in the description and claims to modify a claim component does not in itself connote any priority or order of one claim component over another, or any priority in manufacturing processes with respect to one claim component over another, but rather the ordinal terms are used for the sake of clear and manifold reference to either an amount or to different components according to a specific embodiment.

[0074] Certain words are used throughout this specification and claims, which are intended to refer to particular components. As one skilled in the art will appreciate, electronic equipment manufacturers can refer to a component by different names. This document does not intend to distinguish between components that differ in name but not in function. In the following description and in the claims, the terms "include" and "comprise" and the like are used in an open-ended fashion, and thus should be interpreted to mean "including, but not limited to." Also, the term "couple" or "coupled" as used herein is intended to mean either an indirect or direct electrical connection. Accordingly, when the term "couple" or "coupled" is used in the description, claims and / or drawings, it is intended to mean that the coupled items are either in direct contact or are not in direct contact. The term "and / or" as used herein refers to and encompasses any and all possible combinations of one or more of the associated items, even if the

[0075] As used herein, the terms "about," "approximately," "substantially," and "generally" are intended to mean within 10%, within 5%, within 3%, within 2%, within 1%, or within 0.5% of a given value or range. A given value or range that is about a certain value or range means that the given value or range is implicitly "about" that value or range in the absence of additional language or context. Further, the use of the term "from about first value to about second value" or "from about first value to second value" means that the first value, the second value, and any additional values between the first and second values are included in the range.

[0076] Unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. It will be further understood that terms, such as those defined in commonly used dictionaries, should be interpreted as having a meaning that is consistent with their meaning in the context of the relevant art and the present disclosure, and will not be interpreted in an idealized or overly formal sense unless expressly so defined herein.

[0077] In addition, relative terms such as "below" or "bottom" and "above" or "top" can be used herein to describe one component's or feature's relationship to another component or feature as illustrated in the figures. It will be understood that relative terms are intended to encompass different orientations of an apparatus in addition to the orientation depicted in the figures. For example, if an apparatus in the figures is turned over, elements described as below other elements or as being below other elements can then be oriented upward from the bottom side of the apparatus. The term "on" as used herein refers to direct or indirect contact between two components or features. The term "directly on" refers to direct contact between two components or features.

[0078] In the present application, the thickness, length and width can be measured by optical microscope, and the thickness can be measured by cross-sectional image of electron microscope, but not limited thereto. In addition, there can be a certain error between any two values or directions used for comparison. If the first value is equal to the second value, it implies that there can be about 10% error between the first value and the second value; if the first direction is perpendicular to the second direction, the angle between the first direction and the second direction can be between 80 degrees and 100 degrees; if the first direction is parallel to the second direction, the angle between the first direction and the second direction can be between 0 degree and 10 degrees.

[0079] It should be noted that the technical solutions provided by different embodiments below can be used in combination or mixed to form another embodiment without violating the spirit of the present application.

[0080] Figure 1 A cross-sectional view of an electronic device according to an embodiment of the present application. Figure 2 A perspective view of an electronic device according to an embodiment of the present application. Figure 3A And Figure 3B A partial view of an electronic device according to an embodiment of the present application. As shown in Figure 1 , Figure 2 , Figure 3A and Figure 3B , the electronic device of the present application comprises a panel 100 and a backlight module 200 arranged relative to the panel 100, and the backlight module 200 comprises a light guide plate 10, a first optical component 11 arranged on the light guide plate 10 and having a first prism structure 111, a second optical component 12 arranged on the first optical component 11 and having a second prism structure 121, and a third optical component 13 arranged on the second optical component 12 and having a third prism structure 131; wherein the first prism structure 111 faces the light guide plate 10, and the second prism structure 121 and the third prism structure 131 face the panel 100. In detail, as shown in Figure 2 , Figure 3A and Figure 3BAs shown, the first prism structure 111 can have a plurality of first strip structures 111a and a surface 111b relative to the plurality of first strip structures 111a, the second prism structure 121 can have a plurality of second strip structures 121a and a surface 121b relative to the plurality of second strip structures 121a, the third prism structure 131 can have a plurality of third strip structures 131a and a surface 131b relative to the plurality of third strip structures 131a, and the first prism structure 111 is referred to as the first strip structure 111a being closer to the light guide plate 10 than the surface 111b, the second prism structure 121 is referred to as the second strip structure 121a being closer to the panel 100 than the surface 121b, and the third prism structure 131 is referred to as the third strip structure 131a being closer to the panel 100 than the surface 131b.

[0081] It should be understood that although only the panel 100 is shown in the drawings, the panel 100 can include upper and lower substrates, display units, sealants, alignment films, polarizing plates, light shielding layers, color filter layers, and / or driving components, etc., but the present application is not limited thereto.

[0082] In the present application, as shown in Figure 1 and Figure 2 The backlight module 200 can further include a reflective structure 40, which can be disposed under the light guide plate 10 and used to reflect light emitted through the bottom of the light guide plate 10 so that the light travels toward the panel 100 to improve the utilization of light. In some embodiments, the material of the reflective structure 40 is not particularly limited, for example, including metal, white ink, other reflective materials, or combinations thereof. Among them, the metal can include gold, silver, copper, aluminum, or combinations thereof, but is not limited thereto. The white ink can include white polyimide, resin, or combinations thereof, but is not limited thereto. In addition, the reflective structure 40 can include a single-layer or multi-layer film reflective sheet.

[0083] As shown in Figure 1 and Figure 2As shown, the backlight module 200 can further include a light source 20, which can include a plurality of light emitting components 201, and the plurality of light emitting components 201 can be arranged, for example, along a first direction Y. In some embodiments, the light source 20 can include light emitting diodes, which can include, for example, organic light emitting diodes (OLEDs), mini LEDs, micro LEDs, or quantum dot LEDs (which can include QLEDs, QDLEDs), fluorescence, phosphor, or other suitable materials, or combinations thereof, but are not limited thereto. In some embodiments, the backlight module 200 can include a frame F1 and / or a support frame F2, the frame F1 can be used to accommodate the light source 20, the light guide plate 10, or the optical film layers (e.g., the first optical component 11, the second optical component 12, and / or the third optical component 13) described above, and the support frame F2, but are not limited thereto. The panel 100 can be disposed, for example, on the support frame F2. In some embodiments, the material of the frame F1 and / or the support frame F2 can include metal, plastic, ceramic, other suitable materials, or combinations thereof, but are not limited thereto. In some embodiments, the backlight module 200 can include a circuit board CB, which can include a rigid circuit board (e.g., a printed circuit board (PCB)) or a flexible circuit board (e.g., a flexible printed circuit (FPC)), and the circuit board CB can include active driving components or passive driving components, which can be used to control the light emission of the light source 20, but are not limited thereto.

[0084] In some embodiments, the backlight module 200 further includes a reflective component 126, which can be adjacent to the light source 20 and the light entrance surface ES of the light guide plate 10, and the reflective component 126 can be disposed on the light source 20 and / or part of the light guide plate 10. In some embodiments, the reflective component 126 can include a material with high reflectivity, for example, a material with a reflectivity between 70% and 99% (70%≤ reflectivity≤ 99%), but is not limited thereto. In some embodiments, the material of the reflective component 126 can include metal, white ink, white tape, other suitable reflective materials, or combinations thereof, but is not limited thereto. The reflective component 126 can be used to reflect the light generated by the light source 20 to the light guide plate 10, reduce light loss, reduce light leakage, or improve the brightness of the electronic device.

[0085] The structural details of the first optical component 11, the second optical component 12, and the third optical component 13 of the present application will be described in detail below.

[0086] As Figure 2As shown, the light source 20 can include a plurality of light emitting components 201, and the plurality of light emitting components 201 can be arranged, for example, along a first direction Y. The extending direction of the first prismatic structure 111 can be, for example, perpendicular to the first direction Y. The extending direction of the second prismatic structure 121 can be, for example, parallel to the first direction Y. The extending direction of the third prismatic structure 131 can be, for example, perpendicular to the first direction Y, but not limited thereto. The "perpendicular" means that the angle between the extending direction of the prismatic structure and the first direction Y is between 87° and 93° (87°≤ angle ≤ 93°). The "parallel" means that the angle between the extending direction of the prismatic structure and the first direction Y is between 0° and 6° (0°≤ angle ≤ 6°).

[0087] In more detail, as shown in Figure 1 and Figure 2 , the first prismatic structure 111 can have a plurality of first strip structures 111a, and the extending direction of the first prismatic structure 111 is the extending direction of the first strip structure 111a. Similarly, the second prismatic structure 121 can have a plurality of second strip structures 121a, and the extending direction of the second prismatic structure 121 is the extending direction of the second strip structure 121a. Similarly, the third prismatic structure 131 can have a plurality of third strip structures 131a, and the extending direction of the third prismatic structure 131 is the extending direction of the third strip structure 131a.

[0088] Figure 3A and Figure 3B is a partial schematic view of an electronic device according to an embodiment of the present application. For the convenience of description, Figure 3A and Figure 3B part of the structure of the electronic device is omitted, for example, the light source 20, the light emitting component 201, the reflecting component 126, the circuit board CB, the frame F1 and / or the support frame F2, etc. Figure 3A and Figure 3B may correspond to the cross-sectional views in different directions of Figure 2 , respectively.

[0089] As shown in Figure 2 , Figure 3A and Figure 3BAs shown, the extending direction of the first prism structure 111 can be, for example, perpendicular to the first direction Y, the extending direction of the second prism structure 121 can be, for example, parallel to the first direction Y, and the extending direction of the third prism structure 131 can be, for example, perpendicular to the first direction Y, but not limited thereto. The first prism structure 111 (e.g., the first strip structure 111a) can have a first top angle θ1, the second prism structure 121 (e.g., the second strip structure 121a) can have a second top angle θ2, and the third prism structure 131 (e.g., the third strip structure 131a) can have a third top angle θ3. In some embodiments, the first top angle θ1 and / or the third top angle θ3 can be between 87° to 93° (87°≤ θ1≤ 93°; 87°≤ θ3≤ 93°) or can be between 88° to 92° (88°≤ θ1≤ 92°; 88°≤ θ3≤ 92°), respectively, but not limited thereto. In some embodiments, the first top angle θ1 and the third top angle θ3 can be the same or different. In some embodiments, the second top angle θ2 is between 50° to 60° (50°≤ θ2≤ 60°) or between 52° to 58° (52°≤ θ2≤ 58°), but not limited thereto.

[0090] In some embodiments, the refractive index n1 of the first optical component 11, the refractive index n2 of the second optical component 12, and / or the refractive index n3 of the third optical component 13 may be between 1.45 and 1.60 (1.45≤n1≤1.60; 1.45≤n2≤1.60; 1.45≤n3≤1.60) or between 1.48 and 1.58 (1.48≤n1≤1.58; 1.48≤n2≤1.58; 1.48≤n3≤1.58), but are not limited thereto. In some embodiments, the refractive indices n1, n2, and / or n3 may be the same or different. In some embodiments, the materials of the first optical component 11, the second optical component 12, and / or the third optical component 13 may include transparent materials, but are not limited thereto. In some embodiments, the first optical component 11, the second optical component 12, and / or the third optical component 13 may include a substrate (not shown) and a corresponding prism structure (e.g., the first prism structure 111, the second prism structure 121, and the third prism structure 131). The materials of the substrate or prism structure may include polycarbonate (PC), polyimide (PI), polyethylene terephthalate (PET), polyether polyol (POP), polymethyl methacrylate (PMMA), cycloolefin polymer (COP), rubber, glass, other suitable materials, or combinations thereof, but are not limited thereto. In some embodiments, the materials of the prism structure may include photocurable adhesives, thermocurable adhesives, photothermal curable adhesives, moisture-curable adhesives, other suitable materials, or combinations thereof, but are not limited thereto. In some embodiments, the material of the prism structure may include optically clear adhesive (OCA), optically clear resin (OCR), acrylic resin, other suitable materials, or combinations thereof, but is not limited thereto. In some embodiments, the same or different materials may be used to fabricate the first optical component 11, the second optical component 12, and the third optical component 13.

[0091] The backlight module 200 of the present invention can concentrate the light emitted from the backlight module 200 towards a positive viewing angle by means of the arrangement of the first optical component 11, the second optical component 12, and the third optical component 13, for example, the angle relationship between the first prism structure 111, the second prism structure 121, and the third prism structure 131 and the first direction Y (the arrangement direction of the light-emitting component 201), or the relationship between the first prism structure 111, the second prism structure 121, and the third prism structure 131 facing or moving away from the light guide plate 10. Figures 4A-4D A detailed explanation will be provided based on the optical analysis results. Furthermore, a better effect of concentrating light towards the positive viewing angle can be achieved through the angle design of the first apex angle θ1 of the first prism structure 111, the second apex angle θ2 of the second prism structure 121, and / or the third apex angle θ3 of the third prism structure 131. When the backlight module 200 of this invention is combined with the panel 100, an electronic device with more concentrated light towards the positive viewing angle can be obtained. Therefore, privacy requirements can be met without the need for additional privacy films or collimated backlight modules with low yield and / or high cost.

[0092] In some embodiments, the surface 121b of the second optical component 12 may be a rough surface, and the haze of the surface 121b may be between 3% and 15% (3% ≤ haze ≤ 15%) or between 5% and 12% (5% ≤ haze ≤ 12%), but is not limited thereto. The haze design of the surface 121b can reduce the risk of mutual adsorption between the second optical component 12 and the first optical component 11, thereby improving quality defects.

[0093] like Figures 1-3B As shown, the backlight module 200 may further include a diffusion component 14, which may be disposed on the third optical component 13. In some embodiments, the backlight module 200 may further include a diffusion component 14-1 disposed between the first optical component 11 and the light guide plate 10, but is not limited thereto. In some embodiments, the haze of the diffusion component 14 and / or the diffusion component 14-1 may be between 5% and 50% (5% ≤ haze ≤ 50%) or between 30% and 50% (30% ≤ haze ≤ 50%), but is not limited thereto. In some embodiments, the diffusion component 14 may be used to disperse the light emitted by the light source 20 to make the brightness of the backlight module 200 more uniform. In some embodiments, the haze of the surface 121b of the second optical component 12 may be prepared by texturing, sandblasting or other suitable processes, but is not limited thereto.

[0094] Figures 4A-4D This is an optical analysis result of an electronic device under different backlight module states according to an embodiment of the present invention. Specifically, Figures 4A-4DThese are optical analysis results for electronic devices with different optical film layers under the backlight module 200. These optical analysis results are, for example, measurements taken under the electronic device including the panel 100 and the backlight module. These optical analysis results can be obtained, for example, by measurement using a conoscopic lens, but are not limited to this. For example, the optical analysis result graphs can be measured or analyzed using a conoscope, BM5A, conometer 80U, or other suitable instruments, but are not limited to this.

[0095] It should be noted that, Figures 4A-4D The optical analysis results may include azimuth angles. (As shown in the figure, azimuth angles range from 0 degrees to 360 degrees) and tilt angle θ (as shown in the figure, tilt angles range from 0 degrees to 80 degrees). The tilt angle θ is, for example, the angle with the normal direction of panel 100; a tilt angle θ of 0 degrees can represent the vertical direction on the upper surface of panel 100. Azimuth angle For example, the azimuth angle is the angle parallel to the upper surface of panel 100. A 90-degree position can roughly correspond to the light-incident surface ES of the light guide plate 10 (e.g. Figure 2 The position and azimuth angle shown) The position at 270 degrees can be roughly corresponding to the light incident surface ES of the light guide plate 10 (e.g. Figure 2 The position of the opposite face BS (as shown). Additionally... Figures 4A-4D The color levels on the right represent different brightness levels per unit area (cd / m²). 2 The range of luminance values ​​per unit area (cd / m²) 2 The scope is only for illustrating the results of one embodiment, but the invention is not limited thereto. The brightness value per unit area may vary depending on the design of the panel 100 or other factors.

[0096] As mentioned above, Figures 4A-4D The results show the optical analysis of electronic devices with different optical film layers in the backlight module 200. For example, when the backlight module only contains the light guide plate 10, the measured optical analysis results of the electronic device are as follows: Figure 4A As shown; when the backlight module includes, in addition to the light guide plate 10, the first optical component 11 as described above, the measured optical analysis results of the electronic device are as follows: Figure 4B As shown; when the backlight module includes, in addition to the light guide plate 10, the first optical component 11 and the second optical component 12 as described above, the measured optical analysis results of the electronic device are as follows. Figure 4C As shown; when the backlight module, in addition to the light guide plate 10, also includes the first optical component 11, the second optical component 12, and the third optical component 13 as described above, the measured optical analysis results of the electronic device are as follows. Figure 4D As shown.

[0097] In detail, such as Figure 4A As shown, when the backlight module 200 contains only the light guide plate 10, the luminance per unit area of ​​light is 2.5E+04 cd / m². 2 The above part can be located approximately at the azimuth angle. The angle is between 240 and 310 degrees, and the tilt angle θ is approximately between 60 and 80 degrees, but not limited to this range. In other words, when the light source 20 emits light to the light guide plate 10, the light can, for example, be concentrated at the position opposite the incident light surface ES to the surface BS. When the first optical component 11, the second optical component 12, and the third optical component 13 are sequentially arranged on the light guide plate 10 in the backlight module 200, the optical analysis results can, for example... Figures 4B-4D The order of the tones. In detail, such as... Figure 4B As shown, after the light passes through the light guide plate 10 and the first optical component 11, the light can be roughly dispersed into two parts by the first optical component 11 (e.g., Figure 4B (The lower left and lower right portions of the image), where the luminance per unit area in the lower left portion is greater than 2.5E+04 cd / m². 2 The above part roughly corresponds to the azimuth angle. The location is approximately between 230 and 250 degrees, with a tilt angle θ between approximately 60 and 80 degrees. The luminance per unit area in the lower right portion is greater than 2.5E+04 cd / m². 2 The part can roughly correspond to the azimuth angle The location is approximately between 300 and 320 degrees, with an inclination angle θ between approximately 60 and 80 degrees, but is not limited to this range. For example... Figure 4C As shown, after the light passes through the light guide plate 10, the first optical component 11, and the second optical component 12, as... Figure 4B The beam splitting of the two parts (lower left and lower right) can, for example, change towards the position of the normal viewing angle (i.e., the closer the tilt angle θ is to 0 degrees), as shown above. Figure 4B The two parts mentioned can roughly correspond to positions with an inclination angle θ of approximately 60 to 80 degrees, while Figure 4C The positions of the two parts shown are changed to an angle θ of approximately 20 to 40 degrees, but not limited to this. In other words, after the light passes through the second optical component 12, the beams from the two parts are concentrated towards the positive angle. Additionally, as... Figure 4DAs shown, the two portions of the split light can be concentrated together, for example, after the light passes through the light guide plate 10, the first optical component 11, the second optical component 12, and the third optical component 13, so that the light is concentrated at the normal viewing angle position of the electronic device. By virtue of the relative relationship design of the light guide plate 10, the first optical component 11, the second optical component 12, and the third optical component 13 of the backlight module 200, the electronic device has the characteristic that the light is concentrated towards the normal viewing angle. The backlight module can be applied to a privacy use, or can improve the brightness of the normal viewing angle to reduce energy consumption or improve the contrast ratio, etc.

[0098] Figure 5 A cross-sectional view of an electronic device according to an embodiment of the present application is shown. In the figure, Figure 5 The electronic device is similar to Figure 1 except for the following differences.

[0099] Figure 5 The backlight module 200 shown can further include at least one adhesive layer 30, which can be disposed between the first optical component 11 and the second optical component 12, or between the second optical component 12 and the third optical component 13. In some embodiments, the adhesive layer 30 can be selectively disposed between the third optical component 13 and the diffusion component 14, but is not limited thereto. In some embodiments, the backlight module 200 can include at least one adhesive layer 30, which can be selectively disposed between the first optical component 11, the second optical component 12, the third optical component 13, and the first diffusion component 14, respectively. In some embodiments, the first optical component 11, the second optical component 12, the third optical component 13, and / or the diffusion component 14 can be bonded to each other by the adhesive layer 30 to form an optical film stack, but are not limited thereto.

[0100] In some embodiments, the adhesive layer 30 includes a light-curable adhesive, a heat-curable adhesive, a light-heat-curable adhesive, a moisture-curable adhesive, a tape, other suitable materials, or combinations thereof, but is not limited thereto. In some embodiments, the adhesive layer 30 can include polyvinyl butyral (PVB), ethylene-vinyl acetate (EVA), thermoplastic polyurethane (TPU), optical clear adhesive (OCA), optical clear resin (OCR), other suitable materials, or combinations thereof, but is not limited thereto. The use of the adhesive layer 30 can reduce the relative positional deviation between the layers, or reduce the assembly process.

[0101] Figure 6 A cross-sectional view of an electronic device according to an embodiment of the present application is shown. In the figure, Figure 6 The electronic device is similar to Figure 1 except for the following differences.

[0102] like Figure 6 The backlight module 200 shown may further include a grating assembly 16, which may be disposed between the third optical assembly 13 and the panel 100. For example, a diffuser assembly 14 may be disposed between the grating assembly 16 and the third optical assembly 13. In other embodiments (not shown), an adhesive layer may be selectively disposed between the grating assembly 16 and the diffuser assembly 14 to bond them together. In some embodiments, the grating assembly 16 may include an advanced light control film (ALCF), a view control film (VCF), or other suitable light control layers, but is not limited thereto. In some embodiments, the grating assembly 16 can be used to control the viewing angle of an electronic device.

[0103] Figure 7 This is a cross-sectional view of an electronic device according to an embodiment of the present invention. Wherein, Figure 7 electronic devices and Figure 6 Similar, except for the following differences.

[0104] like Figure 7 The backlight module 200 shown may further include a reflective composite layer 17, which may be disposed, for example, between the third optical component 13 and the panel 100. In some embodiments, the aforementioned diffusion component 14 and / or grating component 16 may be selectively disposed between the reflective composite layer 17 and the third optical component 13, and the grating component 16 may be disposed, for example, between the reflective composite layer 17 and the diffusion component 14. In other embodiments (not shown), an adhesive layer may be selectively disposed between the reflective composite layer 17 and the grating component 16 or between the grating component 16 and the diffusion component 14 to bond them together, but is not limited thereto. In some embodiments, the reflective composite layer 17 may include a dual brightness enhancement film (DBEF) or an advanced polarizer film (APF), but is not limited thereto. The reflective composite layer 17 can be used to improve the utilization rate of the light source and reduce the energy consumption of the electronic device.

[0105] Figure 8 This is a cross-sectional view of an electronic device according to an embodiment of the present invention. Wherein, Figure 8 electronic devices and Figure 1 Similar, except for the following differences.

[0106] like Figure 8The backlight module 200 shown can further include a light absorption layer 401 and a fourth optical component 402. The light absorption layer 401 can be disposed, for example, under the light guide plate 10, i.e., the light guide plate 10 can be disposed between the light absorption layer 401 and the panel 100. In some embodiments, the fourth optical component 402 can be disposed, for example, between the light guide plate 10 and the light absorption layer 401. In some embodiments, there can be air between the fourth optical component 402 and the light guide plate 10. In some embodiments, the light guide plate 10 can be disposed between the fourth optical component 402 and the panel 100. In some embodiments, the fourth optical component 402 can have a fourth prism structure 4021, and the fourth prism structure 4021 is, for example, toward the light guide plate 10. More specifically, the fourth prism structure 4021 can have a plurality of fourth strip structures 4021a and a surface 402b relative to the plurality of fourth strip structures 4021a, and the fourth prism structure 4021 toward the light guide plate 10 is that the fourth strip structures 4021a are closer to the light guide plate 10 than the surface 402b. In some embodiments, the light emitting component 201 is arranged along a first direction Y, and the extension direction of the fourth prism structure 4021 is, for example, perpendicular to the first direction Y, but is not limited thereto. The "perpendicular" means that the angle between the extension direction of the prism structure and the first direction Y is between 87° and 93° (87° ≤ the angle ≤ 93°). More specifically, the fourth prism structure 4021 can have a plurality of fourth strip structures 4021a, and the extension direction of the fourth prism structure 4021 is the extension direction of the fourth strip structures 4021a of the fourth prism structure 4021. In some embodiments, the fourth strip structures 4021a of the fourth prism structure 4021 can have a fourth vertex angle θ4, and the fourth vertex angle θ4 can be between 87° and 93° (87° ≤ θ4 ≤ 93°) or between 89° and 91° (89° ≤ θ4 ≤ 91°), but is not limited thereto. In some embodiments, the material or preparation method of the fourth optical component 402 can be, for example, similar to those of the first optical component 11, the second optical component 12, and / or the third optical component 13, which will not be described here.

[0107] As Figure 8In some embodiments of the backlight module 200 shown, the reflectivity of the light-absorbing layer 401 may range from 0% to 25% (0% < reflectivity ≤ 25%) or from 0% to 10% (0% < reflectivity ≤ 10%), but is not limited thereto. In some embodiments, the absorptivity of the light-absorbing layer 401 may range from 75% to 100% (75% ≤ absorptivity < 100%) or from 90% to 100% (90% ≤ absorptivity < 100%), but is not limited thereto. In some embodiments, the material of the light-absorbing layer 401 may comprise a high-absorbent material, a low-reflective material, or a combination thereof, but is not limited thereto. In some embodiments, the material of the light-absorbing layer 401 may comprise particles, coatings, adhesives, other suitable materials, or a combination thereof, but is not limited thereto. In some embodiments, the light-absorbing layer 401 may comprise a black organic material, a black inorganic material, polyethylene terephthalate, black ink, black tape, other suitable materials, or a combination thereof, but is not limited thereto. In some embodiments, the light-absorbing layer 401 may be formed by chemical vapor deposition, coating, evaporation, electroplating, sputtering, lamination, printing, baking, or other suitable processes, but is not limited thereto. In some embodiments, the light-absorbing layer 401 may be used to reduce the chance of stray light emitted from the bottom surface of the light guide plate 10 (i.e., the side near the light-absorbing layer 401) being reflected back to the light guide plate 10, thereby reducing the brightness at a wide viewing angle, or improving the contrast or brightness at a forward viewing angle. For example, the normal direction Z of the panel 100 may be, for example, 0 degrees, and the forward viewing angle may be within approximately ±30 degrees (or 40 degrees) of the normal direction Z of the panel 100, but is not limited thereto.

[0108] Figure 9 This is a cross-sectional view of an electronic device according to an embodiment of the present invention. Wherein, Figure 9 electronic devices and Figure 1 Similar, except for the following differences.

[0109] like Figure 9 The backlight module 200 shown may include a reflective structure 40 and a fourth optical component 402. The reflective structure 40 may be disposed below the light guide plate 10, that is, the fourth optical component 402 may be disposed between the reflective structure 40 and the light guide plate 10. The reflective structure 40 may include a single-layer structure or a composite layer structure. The material of the reflective structure 40 can be referenced as above. Figure 1The reflective structure 40 is described in detail in the above-mentioned patent application, and thus is not described again here. In some embodiments, the reflective structure 40 can comprise an Advanced polarizer film (APF), but is not limited thereto. In some embodiments, the fourth optical component 402 between the reflective structure 40 and the light guide plate 10 can have a fourth prism structure 4021, and the fourth prism structure 4021, for example, faces the light guide plate 10. More specifically, the fourth prism structure 4021 can have a plurality of fourth strip structures 4021a and a surface 402b opposite the plurality of fourth strip structures 4021a, and the so-called fourth prism structure 4021 faces the light guide plate 10, that is, the fourth strip structures 4021a are closer to the light guide plate 10 than the surface 402b. The fourth strip structures 4021a of the fourth prism structure 4021 can have a fourth vertex angle θ4, and the structure or material of the fourth vertex angle θ4 can be as described above Figure 8 with respect to the reflective structure 40, and thus is not described again here.

[0110] Figure 10A A partial perspective view of an electronic device according to an embodiment of the present application. Figure 10B A cross-sectional view along the line I-I’ of the electronic device shown in Figure 10A FIG. 1. The electronic device according to the present embodiment is similar to the electronic device shown in Figure 1 FIG. 1, except for the following differences.

[0111] In the present embodiment, as shown in Figure 10A FIG. 2, the third optical component 13 has a third prism structure 131 facing the panel 100 (as shown in Figure 1 FIG. 1), and the third prism structure 131 can have a plurality of third strip structures 131a and a surface 131b opposite the third strip structures 131a, wherein the extension direction of the third prism structure 131 can be, for example, perpendicular to the first direction Y.

[0112] More specifically, as shown in Figure 10A FIG. 3, the third strip structures 131a can comprise a plurality of sharp-cornered strip structures S1 and a plurality of round-cornered strip structures S2, wherein the sharp-cornered strip structures S1 and the round-cornered strip structures S2 are arranged along the first direction Y, and one of the plurality of strip structures S2 is disposed between two adjacent sharp-cornered strip structures S1. In some embodiments, one to eight sharp-cornered strip structures S1 can be disposed between two adjacent round-cornered strip structures S2. For example, in Figure 10A FIG. 3, two sharp-cornered strip structures S1 are disposed between two adjacent round-cornered strip structures S2, but the present application is not limited thereto. In other words, in a cross-sectional view, as shown in Figure 10BAs shown, the third prism structure 131a can include a plurality of sharp corner portions P1 and a plurality of rounded corner portions P2, the sharp corner portions P1 and the rounded corner portions P2 are arranged along the first direction Y, and one of the plurality of rounded corner portions P2 is disposed between two adjacent sharp corner portions P1, wherein the sharp strip structure S1 can correspond to the sharp corner portion P1, and the rounded strip structure S2 can correspond to the rounded corner portion P2. In some embodiments, one to eight sharp corner portions P1 can be disposed between two adjacent rounded corner portions P2. For example, in some embodiments, two sharp corner portions P1 can be disposed between two adjacent rounded corner portions P2, but not limited thereto. Figure 10B

[0113] In addition, as shown in FIGS. 1A and 1B, in the normal direction Z of the panel 100, the height of the rounded strip structure S2 (i.e., the height from the top end T2 of the rounded corner portion P2 to the surface 131b of the third optical component 13) is less than the height of the sharp strip structure S1 (i.e., the height from the top end T1 of the sharp corner portion P1 to the surface 131b of the third optical component 13). In some embodiments, the height of the rounded strip structure S2 (i.e., the height from the top end T2 of the rounded corner portion P2 to the surface 131b of the third optical component 13) and the height of the sharp strip structure S1 (i.e., the height from the top end T1 of the sharp corner portion P1 to the surface 131b of the third optical component 13) have a height difference H1, wherein the height difference H1 is greater than 0 micrometers (μm) and less than or equal to 2 micrometers (μm) (i.e., 0 μm < height difference H1 ≤ 2 μm), but not limited thereto. Figure 10A Figure 10B

[0114] In some embodiments, as shown in FIGS. 1A and 1B, the sharp corner portion P1 can respectively have a fifth vertex angle θ5, wherein the fifth vertex angle θ5 can be between 87° and 93° (87° ≤ fifth vertex angle θ5 ≤ 93°) or between 88° and 92° (88° ≤ fifth vertex angle θ5 ≤ 92°), but not limited thereto. The rounded corner portion P2 can respectively have a radius of curvature R, wherein the radius of curvature R can be greater than or equal to 3 micrometers (μm) and less than or equal to 5 micrometers (μm) (i.e., 3 μm ≤ radius of curvature R ≤ 5 μm). In addition, in some embodiments, the pitch PI between two adjacent third strip structures 131a can be between 18 micrometers and 50 micrometers (18 μm ≤ pitch PI ≤ 50 μm), wherein the "pitch between two adjacent third strip structures" refers to the distance between the top end T1 of the sharp corner portion P1 and the top end T1 of the adjacent sharp corner portion P1 in the first direction Y, or the distance between the top end T1 of the sharp corner portion P1 and the top end T2 of the adjacent rounded corner portion P2 in the first direction Y. Figure 10B

[0115] ​​​​In some embodiments, the surface 131b of the third optical component 13 may be a rough surface with a haze between 1% and 10% (1% ≤ haze ≤ 10%), but is not limited thereto. In some embodiments, the haze of the surface 131b of the third optical component 13 may be prepared by texturing, sandblasting, or other suitable processes, but is not limited thereto. Furthermore, in some embodiments, the surface 131b of the third optical component 13 may be a smooth surface, which may be formed by a hard coating or a PET surface.

[0116] In this embodiment, as Figure 1 As shown, the backlight module 200 may further include a diffusion component 14 disposed on the third optical component 13, wherein the haze of the diffusion component 14 may be between 1% and 30% (1% ≤ haze ≤ 30%). In some embodiments, although not shown in the figures, the backlight module 200 may not include... Figure 1 The diffusion component 14 is shown. Furthermore, in some other embodiments, the backlight module 200 may not include... Figure 1 The diffusion component 14 shown contains, for example, the diffusion component 14. Figure 3A and Figure 3B The diffuser component 14-1 shown is disposed between the first optical component 11 and the light guide plate 10. The haze of the diffuser component 14-1 can be between 80% and 100% (80% ≤ haze ≤ 100%). In some embodiments, the diffuser component 14-1 can be used to disperse the light emitted by the light source 20 to make the brightness of the backlight module 200 more uniform; the diffuser component 14-1 can be used to concentrate the light to the frontal viewing angle position of the electronic device, but is not limited thereto.

[0117] Figure 11 This is a perspective view of a third optical component according to an embodiment of the present invention. Figure 11 The third optical component and Figure 10A Similar, except for the following differences.

[0118] like Figure 10A As shown, the third strip structure 131a of the third prism structure 131 can be a regular structure. More specifically, the third strip structure 131a can have a top edge e1, which can be a straight line and can be perpendicular to the first direction Y. In other words, the top edge e1 can be parallel to the extension direction of the third prism structure 131a.

[0119] In this embodiment, as Figure 11As shown, the third strip structure 131a of the third prism structure 131 can be an irregular structure, and in more detail, the third strip structure 131a can have a top edge e2, which can not be a straight line, for example, can include an arc line or other irregular lines. In other words, the top edge e2 and the extension direction of the third strip structure 131a can be included at an angle.

[0120] wherein, Figure 10A The top edge e1 of the third strip structure 131a refers to Figure 10B The top end T1 of the pointed corner portion P1 or the top end T2 of the rounded corner portion P2 in the third strip structure 131a in the direction X perpendicular to the first direction Y. Figure 11 The top edge e2 of the third strip structure 131a refers to Figure 10B The top end T1 of the pointed corner portion P1 or the top end T2 of the rounded corner portion P2 in the third strip structure 131a in the direction X perpendicular to the first direction Y.

[0121] The backlight module 200 of the present application can be applied to various electronic devices requiring display panels, and the display panel can be, for example, a flexible display panel, a touch display panel, a curved display panel, or a tiled display panel, but is not limited thereto. The electronic device of the present application can be, for example, a display, a mobile phone, a notebook computer, a video camera, a camera, a music player, a mobile navigation device, a television, or other electronic devices requiring image display, but the present application is not limited thereto.

[0122] The above specific embodiments should be interpreted as merely illustrative, and not in any way limit the rest of the present disclosure.

Claims

1. An electronic device, characterized in that, Include: A panel; and A backlight module, positioned relative to the panel, and comprising: A light guide plate; A first optical component is disposed on the light guide plate and has a first prism structure; A second optical component is disposed on the first optical component and has a second prism structure; as well as A third optical component is disposed on the second optical component and has a third prism structure; The first prism structure faces the light guide plate, while the second and third prism structures face the panel. The refractive index of the first optical component, the refractive index of the second optical component, and the refractive index of the third optical component are all between 1.45 and 1.

60. The first prism structure has a first apex angle, the second prism structure has a second apex angle, and the third prism structure has a third apex angle. The first apex angle and the third apex angle are respectively between 87° and 93°, and the second apex angle is between 50° and 60°.

2. The electronic device as claimed in claim 1, characterized in that, The backlight module also includes a light source, which includes a plurality of light-emitting components arranged along a first direction, wherein the extension direction of the second prism structure is parallel to the first direction, and the extension directions of the first prism structure and the third prism structure are perpendicular to the first direction.

3. The electronic device as claimed in claim 1, characterized in that, The second optical component has a rough surface adjacent to the light guide plate, and the haze of the rough surface is between 3% and 15%.

4. The electronic device as claimed in claim 1, characterized in that, The backlight module also includes a diffusion component disposed on the third optical component, wherein the haze of the diffusion component is between 5% and 50%.

5. The electronic device as claimed in claim 4, characterized in that, The backlight module also includes another diffusion component disposed between the first optical component and the light guide plate, wherein the haze of the other diffusion component is between 5% and 50%.

6. The electronic device as claimed in claim 1, characterized in that, The backlight module also includes an adhesive layer, wherein the adhesive layer is disposed between the first optical component and the second optical component, or between the second optical component and the third optical component.

7. The electronic device as claimed in claim 1, characterized in that, The backlight module also includes a grating assembly disposed between the third optical assembly and the panel.

8. The electronic device as claimed in claim 1, characterized in that, The backlight module also includes a reflective composite layer disposed between the third optical component and the panel.

9. The electronic device as claimed in claim 1, characterized in that, The backlight module also includes: A light-absorbing layer, wherein the light guide plate is disposed between the light-absorbing layer and the panel; and A fourth optical component is disposed between the light guide plate and the light-absorbing layer. The fourth optical component has a fourth prism structure, and the fourth prism structure faces the light guide plate.

10. An electronic device, characterized in that, Include: A panel; and A backlight module, positioned relative to the panel, and comprising: A light guide plate; A first optical component is disposed on the light guide plate and has a first prism structure; A second optical component is disposed on the first optical component and has a second prism structure; as well as A third optical component is disposed on the second optical component and has a third prism structure and a surface opposite to the third prism structure; The third prism structure includes multiple sharp corner portions and multiple rounded corner portions. One of the rounded corner portions is disposed between two adjacent sharp corner portions. In the normal direction of the panel, the height of one of the rounded corner portions to the surface of the third optical component is less than the height of one of the sharp corner portions to the surface of the third optical component. The refractive index of the first optical component, the refractive index of the second optical component, and the refractive index of the third optical component are all between 1.45 and 1.

60. The first prism structure has a first apex angle, the second prism structure has a second apex angle, and the sharp corners of the third prism structure have a third apex angle. The first apex angle and the third apex angle are respectively between 87° and 93°, and the second apex angle is between 50° and 60°.

11. The electronic device as claimed in claim 10, characterized in that, There is a height difference between the height of one of the rounded portions to the surface of the third optical component and the height of one of the sharp corner portions to the surface of the third optical component, wherein the height difference is greater than 0 micrometers and less than or equal to 2 micrometers.

12. The electronic device as claimed in claim 10, characterized in that, Each of these rounded corner portions has a radius of curvature greater than or equal to 3 micrometers and less than or equal to 5 micrometers.

13. The electronic device as claimed in claim 10, characterized in that, One to eight of these sharp corner portions are positioned between two adjacent rounded corner portions.

14. The electronic device as claimed in claim 10, characterized in that, The surface of the third optical component is a rough surface, and the haze of the rough surface is between 1% and 10%.

15. The electronic device as claimed in claim 10, characterized in that, The backlight module also includes a diffusion component disposed on the third optical component, wherein the haze of the diffusion component is between 1% and 30%.

16. The electronic device as claimed in claim 10, characterized in that, The backlight module also includes another diffusion component disposed between the first optical component and the light guide plate, wherein the haze of the other diffusion component is between 80% and 100%.

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