CN115602047A - electronic device - Google Patents

Abstract

The invention provides an electronic device, which is characterized by comprising: a panel; and a backlight module disposed opposite to the panel and including: a light guide plate; a first optical assembly disposed on the light guide plate and having a first prism structure; the second optical assembly is arranged on the first optical assembly and is provided with a second prism structure; the third optical assembly is arranged on the second optical assembly and is provided with a third prism structure; the first prism structure faces the light guide plate, and the second prism structure and the third prism structure face the panel.

Description

electronic device

technical field

The present invention relates to a backlight module and an electronic device including the same, in particular to an electronic device including a backlight module with specially designed optical components.

Background technique

With the continuous development of technology, electronic devices are designed to be privacy-proof, low-power consumption, high-quality or low-cost. Nowadays, electronic devices with more concentrated light sources are mostly obtained by attaching anti-spy sheets on the electronic devices or using collimated backlight modules to achieve privacy. However, the above methods still have disadvantages such as high energy consumption, high cost or low yield.

Therefore, it is currently necessary to provide a new backlight module and/or electronic device to improve the above defects.

Contents of the invention

The present invention provides an electronic device, which is characterized in that it includes: a panel; and a backlight module, which is arranged relative to the panel, and includes: a light guide plate; a first optical component, which is arranged on the light guide plate, and has A first prism structure; a second optical component, disposed on the first optical component, and has a second prism structure; and a third optical component, disposed on the second optical component, and has 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.

The present invention also provides an electronic device, which is characterized in that it comprises: 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; The second optical component is disposed on the first optical component; and 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; wherein, the The third prism structure includes a plurality of sharp corners and a plurality of rounded corners, one of the plurality of rounded corners is arranged between two adjacent sharp corners, and in the normal direction of the panel, the A height of one of the rounded corners to the surface of the third optical component is smaller than a height of one of the sharp corners to the surface of the third optical component.

Description of drawings

FIG. 1 is a cross-sectional view of an electronic device according to an embodiment of the present invention.

FIG. 2 is a schematic perspective view of an electronic device according to an embodiment of the present invention.

3A and 3B are partial schematic diagrams of an electronic device according to an embodiment of the present invention.

4A to 4D are optical analysis results of an electronic device under different states of the backlight module according to an embodiment of the present invention.

FIG. 5 is a cross-sectional view of an electronic device according to an embodiment of the present invention.

FIG. 6 is a cross-sectional view of an electronic device according to an embodiment of the present invention.

FIG. 7 is a cross-sectional view of an electronic device according to an embodiment of the present invention.

FIG. 8 is a cross-sectional view of an electronic device according to an embodiment of the present invention.

FIG. 9 is a cross-sectional view of an electronic device according to an embodiment of the present invention.

FIG. 10A is a partial perspective view of an electronic device according to an embodiment of the present invention.

Fig. 10B is a cross-sectional view of the line segment I-I' in Fig. 10A.

FIG. 11 is a schematic perspective view of a third optical component according to an embodiment of the present invention.

[Description of Reference Signs]

100-panel

200-Backlight module

10-Light guide plate

11-First Optical Assembly

111 - The first prism structure

111a - first strip structure

111b-Surface

12-Second Optical Assembly

121 - Second prism structure

121a - second strip structure

121b-Surface

13-Third optical component

131-Third prism structure

131a-Third strip structure

131b-Surface

14 - Diffusion Components

14-1- Diffusion components

16- Grating components

17-reflective composite layer

20-light source

201-Lighting components

30-adhesive layer

40-reflection structure

401-light absorbing layer

402-the fourth optical component

402b-Surface

4021-Fourth Prism Structure

4021a-Fourth Strip Structure

S1-sharp strip structure

S2-Rounded strip structure

P1-pointed part

P2- Fillet part

T1, T2-top

e1, e2-top edge

H1-height difference

R-radius of curvature

PI-pitch

θ1 - first vertex angle

θ2 - second vertex angle

θ3 - third vertex angle

θ4-the fourth vertex angle

θ5 - fifth vertex angle

X-direction

Y-first direction

Z-top view direction

F1-frame

F2-support frame

CB-circuit board

126-reflection component

θ - inclination

-方位角

- azimuth

ES-light incident surface

BS-opposite side

detailed description

The implementation of the present invention will be described below through specific examples, and those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. The present invention can also be implemented or applied by other different specific embodiments, and various modifications and changes can be made to the details in this specification for different viewpoints and applications without departing from the spirit of this creation.

It should be noted that in this article, unless otherwise specified, having “a” component is not limited to having a single component, but may have one or more components. Furthermore, the ordinal numbers used in the specification and claims, such as "first" and "second", are used to modify the components of the claims, which do not imply or represent that the claimed components have any previous ordinal numbers, Nor does it imply the order of a requested component with another requested component, or the order of the manufacturing method, and the use of these ordinal numbers is only used to enable a requested component with a certain name to be able to be used with another requested component with the same name. Make a clear distinction.

Certain terms will be used throughout the present specification and appended claims to refer to particular components. Those skilled in the art should understand that electronic device manufacturers may refer to the same component by different names. This article does not intend to distinguish between those components that have the same function but have different names. In the following description and claims, words such as "comprising", "containing", and "having" are open-ended words, so they should be interpreted as meaning "including but not limited to...". Therefore, when the terms "comprising", "containing" and/or "having" are used in the description of the present invention, it specifies the existence of corresponding features, regions, steps, operations and/or components, but does not exclude one or more The existence of a corresponding feature, region, step, operation and/or component.

In the text, the terms "about", "approximately", "substantially" and "approximately" usually mean within 10%, within 5%, within 3%, within 2%, or within 2% of a given value or range. Within 1% or within 0.5%. The quantities given here are approximate quantities, that is, in the absence of specific descriptions of "about", "approximately", "substantially", "approximately", "approximately", "approximately", "approximately" may still be implied The meaning of "essentially" and "approximately". In addition, the terms "the range is from the first value to the second value" and "the range is between the first value to the second value" mean that the range includes the first value, the second value and other values therebetween.

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 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 related art and the present invention, and not in an idealized or overly formal manner Interpretation, unless specifically defined herein.

In addition, relative terms such as "below" or "bottom" and "upper" or "top" may be used in the embodiments to describe the relative relationship of one component to another in the drawings. It will be appreciated that if the illustrated device is turned over so that it is upside down, components described as being on the "lower" side would then become components on the "upper" side. When a corresponding element (eg, a film layer or a region) is referred to as being "on" another element, it can be directly on the other element, or there may be other elements interposed therebetween. On the other hand, when an element is referred to as being "directly on" another element, there are no elements in between. In addition, when a component is referred to as "on another component", the two have a vertical relationship in the plan view direction, and the component can be above or below the other component, and this vertical relationship depends on the orientation of the device ( orientation).

In the present invention, the thickness, length and width can be measured by optical microscope, and the thickness can be measured by cross-sectional image in electron microscope, but not limited thereto. In addition, any two values or directions used for comparison may have certain errors. If the first value is equal to the second value, it implies that there may be an error of about 10% between the first value and the second value; if the first direction is perpendicular to the second direction, the difference between the first direction and the second direction The angle between them may be between 80° and 100°; if the first direction is parallel to the second direction, the angle between the first direction and the second direction may be between 0° and 10°.

It should be noted that the technical solutions provided in different embodiments below can be replaced, combined or mixed with each other to form another embodiment without violating the spirit of the present invention.

FIG. 1 is a cross-sectional view of an electronic device according to an embodiment of the present invention. FIG. 2 is a schematic perspective view of an electronic device according to an embodiment of the present invention. 3A and 3B are partial schematic diagrams of an electronic device according to an embodiment of the present invention. As shown in Fig. 1, Fig. 2, Fig. 3A and Fig. 3B, the electronic device of the present invention is characterized in that it includes: a panel 100; ; a first optical component 11, disposed on the light guide plate 10, and has a first prism structure 111; a second optical component 12, disposed on the first optical component 11, and has a second prism structure 121; and A third optical component 13 is disposed on the second optical component 12 and has 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 FIG. 2, FIG. 3A and FIG. 3B, the first prism structure 111 may have a plurality of first strip structures 111a and a surface 111b. Compared with the plurality of first strip structures 111a, the second prism structure 121 can have multiple second strip structures 121a and a surface 121b relative to the multiple second strip structures 121a, and the third prism structure 131 can have multiple third strip structures 131a and a surface 131b relative to the third strip structures 131a. structure 131a, and the so-called first prism structure 111 faces the light guide plate 10 as the first strip structure 111a is closer to the light guide plate 10 than the surface 111b, and the so-called second prism structure 121 faces the panel 100 as the second strip structure 121a The so-called third prism structure 131 facing the panel 100 is closer to the panel 100 than the surface 121b, and the third strip structure 131a is closer to the panel 100 than the surface 131b.

It should be understood that although only the panel 100 is shown in the drawings, the panel 100 may include upper and lower substrates, display units, seals, alignment films, polarizers, light shielding layers, color filter layers and/or driving components, etc., but The present invention is not limited thereto.

In the present invention, as shown in FIG. 1 and FIG. 2, the backlight module 200 may further include a reflective structure 40, which may be disposed under the light guide plate 10, and used to reflect light emitted from the bottom of the light guide plate 10, so that The light travels toward the panel 100 to improve light utilization efficiency. In some embodiments, the material of the reflective structure 40 is not particularly limited, for example, it includes metal, white ink, other reflective materials or combinations thereof. Wherein, the metal may include gold, silver, copper, aluminum or a combination thereof, but is not limited thereto. The white ink may include white polyimide, resin, or a combination thereof, but is not limited thereto. In addition, the reflective structure 40 may include a single-layer or multi-layer reflective sheet.

As shown in FIGS. 1 and 2 , the backlight module 200 may further include a light source 20 , the light source 20 may include a plurality of light emitting elements 201 , and the plurality of light emitting elements 201 may be arranged along a first direction Y, for example. In some embodiments, the light source 20 may include a light emitting diode, and the light emitting diode may include, for example, an organic light emitting diode (OLED), a submillimeter light emitting diode (mini LED), a micro light emitting diode (micro LED) or a quantum dot light emitting diode. Diode (quantumdot LED, may include QLED, QDLED), fluorescence (fluorescence), phosphorescence (phosphor) or other suitable materials, or a combination of the above, but not limited thereto. In some embodiments, the backlight module 200 may include a frame F1 and/or a supporting frame F2, and the frame F1 may be used to accommodate the above-mentioned light source 20, the light guide plate 10, or the above-mentioned optical film layer (such as the first optical component 11, the second The second optical component 12 and/or the third optical component 13) and the support frame F2, but not limited thereto. The panel 100 can be disposed on the supporting frame F2, for example. In some embodiments, the material of the frame F1 and/or the support frame F2 may include metal, plastic, ceramics, other suitable materials or combinations thereof, but is not limited thereto. In some embodiments, the backlight module 200 may include a circuit board CB, and the circuit board CB may include a rigid circuit board (such as a printed circuit board (PCB)) or a flexible circuit board (such as a flexible printed circuit board (flexible printed circuit, FPC)), the circuit board CB may contain active driving components or passive driving components, and the circuit board CB may be used to control the output of the light source 20, but is not limited thereto.

In some embodiments, the backlight module 200 further includes a reflective component 126, the reflective component 126 may be adjacent to the light source 20 and the light incident surface ES of the light guide plate 10, and the reflective component 126 may be disposed on the light source 20 and/or part of the light guide plate 10 . In some embodiments, the reflective component 126 may include a material with high reflectivity, such as 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 may include metal, white ink, white tape, other suitable reflective materials or combinations thereof, but is not limited thereto. The reflection component 126 can be used to reflect the light generated by the light source 20 to the light guide plate 10 to reduce light loss and light leakage, or increase the brightness of the electronic device.

The construction details of the first optical assembly 11 , the second optical assembly 12 , and the third optical assembly 13 of the present invention will be described in detail below.

As shown in FIG. 2, the light source 20 may include a plurality of light emitting components 201, and the plurality of light emitting components 201 may be arranged, for example, along a first direction Y, and the extending direction of the first prism structure 111 may be, for example, perpendicular to the first direction Y. The extending direction of the second prism structure 121 may be, for example, parallel to the first direction Y, and the extending direction of the third prism structure 131 may 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 prism 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 prism structure and the first direction Y is between 0° and 6° (0°≤angle≤6°).

In more detail, as shown in FIG. 1 and FIG. 2, the first prism structure 111 may have a plurality of first strip structures 111a, and the extension direction of the so-called first prism structures 111 is the direction of the first strip structures 111a. Extension direction. Similarly, the second prism structure 121 may have a plurality of second strip structures 121a, and the extension direction of the so-called second prism structure 121 is the extension direction of the second strip structures 121a. Similarly, the third prism structure 131 may have a plurality of third strip structures 131a, and the extension direction of the so-called third prism structure 131 is the extension direction of the third strip structures 131a.

3A and 3B are partial schematic diagrams of an electronic device according to an embodiment of the present invention. For convenience of illustration, FIG. 3A and FIG. 3B omit some structures of the electronic device, such as the light source 20, the light emitting component 201, the reflective component 126, the circuit board CB, the frame F1 and/or the supporting frame F2, etc. 3A and 3B may respectively correspond to cross-sectional views in different directions of FIG. 2 .

As shown in FIG. 2, FIG. 3A and FIG. 3B, the extension direction of the first prism structure 111 can be, for example, perpendicular to the first direction Y, the extension direction of the second prism structure 121 can be, for example, parallel to the first direction Y, and the third prism structure The extending direction of 131 may be, for example, perpendicular to the first direction Y, but is not limited thereto. The first prism structure 111 (such as the first strip structure 111a) can have a first vertex angle θ1, the second prism structure 121 (such as the second strip structure 121a) can have a second vertex angle θ2, and the third prism structure 131 (For example, the third strip structure 131a) may have a third apex angle θ3. In some embodiments, the first vertex angle θ1 and/or the third vertex angle θ3 can be between 87° and 93° respectively (87°≤θ1≤93°; 87°≤θ3≤93°) or can be respectively Between 88° and 92° (88°≤θ1≤92°; 88°≤θ3≤92°), but not limited thereto. In some embodiments, the first vertex angle θ1 and the third vertex angle θ3 may be the same or different. In some embodiments, the second vertex angle θ2 is between 50° and 60° (50°≤θ2≤60°) or between 52° and 58° (52°≤θ2≤58°), but Not limited to this.

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 not limited thereto. In some embodiments, the refractive index n1, the refractive index n2, and/or the refractive index n3 may be the same or different. In some embodiments, the material of the first optical component 11 , the second optical component 12 and/or the third optical component 13 may include a transparent material, but is 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 in the figure) and a corresponding prism structure (such as the first prism structure 111, the second prism structure 121 and the third prism structure 131). The material of the above-mentioned base or prism structure may include polycarbonate (polycarbonate, PC), polyimide (polyimide, PI), polyethylene terephthalate (polyethyleneterephthalate, PET), polymer polyol (polyether polyol) , POP), polymethylmethacrylate (polymethylmethacrylate, PMMA), cycloolefin polymer (cycloolefin polymer, COP), rubber, glass, other suitable materials or combinations thereof, but not limited thereto. In some embodiments, the material of the above-mentioned prism structure may include light-curable glue, heat-curable glue, light-heat-curable glue, moisture-curable glue, other suitable materials or combinations thereof, but is not limited thereto. In some embodiments, the material of the prism structure may include optical clear adhesive (optical clear adhesive, OCA), optical clear resin (optical clear resin, OCR), acrylic resin (acrylic resin), other suitable materials, or a combination of the foregoing, But not limited to this. In some embodiments, the same or different materials can be used to prepare the first optical component 11 , the second optical component 12 and the third optical component 13 .

The backlight module 200 of the present invention can rely on the arrangement position among the first optical component 11, the second optical component 12 and the third optical component 13, such as the first prism structure 111, the second prism structure 121 and the third prism The angle relationship between the structures 131 and the first direction Y (arrangement direction of the light-emitting components 201), or the relationship between the first prism structure 111, the second prism structure 121 and the third prism structure 131 respectively facing or away from the light guide plate 10, can make The light emitted from the backlight module 200 is concentrated toward the front viewing angle, and will be described in detail through optical analysis results in FIGS. 4A to 4D . In addition, better light direction can be achieved through the angle design of the first vertex angle θ1 of the first prism structure 111, the second vertex angle θ2 of the second prism structure 121 and/or the third vertex angle θ3 of the third prism structure 131. The effect of orthographic focus. When the backlight module 200 of the present invention is combined with the panel 100, an electronic device with more concentrated light toward the front view angle can be obtained, so it can be used without additional attachment or setting of a privacy sheet, or without low yield and/or high In the case of a collimated backlight module with low cost, privacy requirements can be met.

In some embodiments, the surface 121b of the second optical component 12 can be a rough surface, and the haze (Haze) of the surface 121b can be between 3% and 15% (3%≤haze≤15%) or between Between 5% and 12% (5%≤haze≤12%), but 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, so as to improve taste defects.

As shown in FIG. 1 to FIG. 3B , the backlight module 200 may further include a diffusion component 14 , and the diffusion component 14 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 diffuser element 14 and/or the diffuser element 14-1 may be between 5% and 50% (5%≤haze≤50%) or between 30% and 50% respectively. Between (30%≤haze≤50%), but not limited thereto. In some embodiments, the diffusion component 14 can be used to diffuse 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 can be prepared by embossing, sandblasting or other suitable processes, but is not limited thereto.

4A to 4D are optical analysis results of an electronic device under different states of the backlight module according to an embodiment of the present invention. In detail, FIG. 4A to FIG. 4D are the optical analysis results of the electronic device under the optical film layer with different backlight modules 200 , such optical analysis results are measured under the electronic device including the panel 100 and the backlight module. These optical analysis results may be, for example, the results obtained by measuring with a conoscopic lens, but are not limited thereto. For example, the optical analysis results graph can be measured or analyzed using Conoscope, BM5A, Conometer80U or other suitable instruments, but not limited thereto.

(如图中0度至360度的方位角)与倾角θ(如图中0度至80度的倾角)。倾角θ例如为与面板100的法线方向的夹角，倾角θ为0度可代表为于面板100的上表面的垂直方向。方位角

例如为平行于面板100的上表面方向上的角度，方位角

为90度的位置可大致对应为导光板10的入光面ES(如图2所示)的位置，方位角

为270度的位置可大致为对应导光板10的入光面ES(如图2所示)的相对面BS的位置。另外，图4A至4D的右侧色阶代表不同的单位面积的亮度(cd/m²)范围，此单位面积的亮度值(cd/m²)范围仅为示意某一实施例的结果，但本发明不限于此，此单位面积的亮度值可能会根据面板100的设计或其它因素而有所不同。It should be noted that the optical analysis results in Figures 4A to 4D can include the azimuth angle

(the azimuth angle from 0° to 360° in the figure) and the inclination θ (the inclination angle from 0° to 80° in the figure). The inclination angle θ is, for example, an included angle with the normal direction of the panel 100 , and an inclination angle θ of 0 degrees may represent a vertical direction to the upper surface of the panel 100 . Azimuth

For example, it is an angle parallel to the direction of the upper surface of the panel 100, the azimuth angle

The position of 90 degrees can roughly correspond to the position of the light incident surface ES (as shown in FIG. 2 ) of the light guide plate 10, and the azimuth angle

The position at 270 degrees may be approximately the position corresponding to the opposite surface BS of the light incident surface ES (shown in FIG. 2 ) of the light guide plate 10 . In addition, the right color scales in FIGS. 4A to 4D represent different ranges of luminance per unit area (cd/m ^{2 )} . The present invention is not limited thereto, and the luminance value per unit area may vary according to the design of the panel 100 or other factors.

As mentioned above, FIG. 4A to FIG. 4D are the optical analysis results of the electronic device under the optical film layer with different backlight modules 200 respectively. For example, when the backlight module only includes the light guide plate 10, the optical analysis results of the measured electronic device are shown in FIG. 4A; When an optical component 11 is used, the optical analysis result of the measured electronic device is shown in Figure 4B; when the backlight module, in addition to the light guide plate 10, also includes the first optical component 11 and the second optical component as mentioned above 12 o'clock, the optical analysis results of the measured electronic device are shown in FIG. When there are three optical components 13, the optical analysis results of the measured electronic device are shown in FIG. 4D.

为240度至310度之间，且倾角θ大约为60度至80度之间的范围间，但不限于此。换句话说，当光源20发射光线至导光板10后，光线可例如先集中在入光面ES的相对面BS的位置。当在背光模块200中的导光板10上依序设置上述的第一光学组件11、第二光学组件12及第三光学组件13后，其光学分析结果可例如图4B至图4D所依序调变。详细来说，如图4B所示，当光线经过导光板10及第一光学组件11后，光线例如可大致被第一光学组件11分散成两个部分(如图4B中的左下部分与右下部分)，其中左下部分中的单位面积的亮度值大于2.5E+04cd/m²以上的部分可大致对应于方位角

约为230度至250度之间，且倾角θ大约为60度至80度之间的范围间的位置，右下部分中的单位面积的亮度值大于2.5E+04cd/m²的部分可大致对应于方位角

约为300度至320度之间，且倾角θ大约为60度至80度之间的范围间的位置，但不限于此。如图4C所示，当光线经过导光板10、第一光学组件11及第二光学组件12后，如图4B的两个部分(左下部分与右下部分)的分光可例如朝正视角(即倾角θ越接近0度)的位置变化，例如如上图4B所述的两个部分可大致对应于倾角θ大约为60度至80度的位置，而图4C所示的两个部分的位置改变至倾角θ大约为20度至40度的位置，但不限于此。换句话说，光线还经过第二光学组件12后，会使两个部分的分光朝正视角集中。另外，如图4D所示，当光线经过导光板10、第一光学组件11、第二光学组件12及第三光学组件13后，上述的两个部分的分光可例如集中在一起，使光集中至电子装置的正视角位置处。借由本发明的背光模块200的上述的导光板10、第一光学组件11、第二光学组件12及第三光学组件13的相对关系设计，可使电子装置具有光线朝正视角集中的特性，此背光模块可应用于防窥用途，或可提高正视角的光亮度以降低耗能或提高对比度度等功效。In detail, as shown in FIG. 4A, when the backlight module 200 only includes the light guide plate 10, it can be seen that the part of the light with a luminance value per unit area above 2.5E ⁺ 04cd/m2 can be located approximately at the azimuth angle

is between 240 degrees and 310 degrees, and the inclination angle θ is approximately between 60 degrees and 80 degrees, but not limited thereto. In other words, after the light source 20 emits light to the light guide plate 10 , the light may first be concentrated on the position of the surface BS opposite to the light incident surface ES. After the above-mentioned first optical component 11, second optical component 12 and third optical component 13 are sequentially arranged on the light guide plate 10 in the backlight module 200, the optical analysis results can be sequentially adjusted, for example, as shown in FIG. 4B to FIG. 4D Change. In detail, as shown in FIG. 4B, when the light passes through the light guide plate 10 and the first optical component 11, the light can be roughly divided into two parts by the first optical component 11 (the lower left part and the lower right part in FIG. 4B, for example). part), where the luminance value per unit area in the lower left part is greater than 2.5E+04cd/ ^m2 and above, which can roughly correspond to the azimuth angle

About 230 degrees to 250 degrees, and the inclination angle θ is about 60 degrees to 80 degrees, the lower right part of the part with a brightness value per unit area greater than 2.5E ⁺ 04cd/m2 can be roughly corresponding to the azimuth

It is about 300 degrees to 320 degrees, and the inclination θ is about 60 degrees to 80 degrees, but not limited thereto. As shown in FIG. 4C, when the light passes through the light guide plate 10, the first optical component 11 and the second optical component 12, the light splitting of the two parts (lower left part and lower right part) in FIG. the closer the inclination angle θ is to 0 degrees), for example, the two parts as described above in FIG. The inclination angle θ is about 20 degrees to 40 degrees, but not limited thereto. In other words, after the light passes through the second optical component 12, the split light of the two parts will be concentrated toward the normal viewing angle. In addition, as shown in FIG. 4D, when the light passes through the light guide plate 10, the first optical assembly 11, the second optical assembly 12, and the third optical assembly 13, the light splitting of the above two parts can be concentrated, for example, so that the light can be concentrated to the front viewing angle of the electronic device. Through the design of the relative relationship between 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 of the present invention, the electronic device can have the characteristic of concentrating light toward the normal viewing angle. The backlight module can be used for anti-peeping purposes, or can increase the brightness of the front viewing angle to reduce energy consumption or improve contrast.

FIG. 5 is a cross-sectional view of an electronic device according to an embodiment of the present invention. Wherein, the electronic device of FIG. 5 is similar to that of FIG. 1 except for the following differences.

The backlight module 200 shown in FIG. 5 may further include at least one adhesive layer 30, and the adhesive layer 30 may 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. Between 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 may include at least one adhesive layer 30, and the adhesive layer 30 may 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. between. 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 through the adhesive layer 30 to form an optical film set, but not limited thereto .

In some embodiments, the adhesive layer 30 includes light-curable adhesive material, heat-curable adhesive material, photothermal-curable adhesive material, moisture-curable adhesive material, adhesive tape, other suitable materials, or a combination of the foregoing, but not limited to this. In some embodiments, the adhesive layer 30 may include polyvinyl butyral (PVB), ethylene-vinyl acetate (EVA), thermoplastic polyurethane (TPU), optical clear adhesive (OCA), optically transparent resin ( optical clear resin, OCR), other suitable materials or a combination of the above, but not limited thereto. The arrangement of the adhesive layer 30 can reduce the relative position deviation between the components of each layer, or reduce the assembly procedure.

FIG. 6 is a cross-sectional view of an electronic device according to an embodiment of the present invention. Wherein, the electronic device of FIG. 6 is similar to that of FIG. 1 except for the following differences.

The backlight module 200 shown in FIG. 6 may further include a grating component 16 , and the grating component 16 may be disposed between the third optical component 13 and the panel 100 . For example, the diffusion component 14 can be disposed between the grating component 16 and the third optical component 13 . In other embodiments (not shown in the figure), an adhesive layer can be optionally provided between the grating component 16 and the diffuser component 14 to adhere to each other. 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 the electronic device.

FIG. 7 is a cross-sectional view of an electronic device according to an embodiment of the present invention. Wherein, the electronic device of FIG. 7 is similar to that of FIG. 6 except for the following differences.

The backlight module 200 shown in FIG. 7 may further include a reflective composite layer 17 , and the reflective composite layer 17 may be disposed between the third optical component 13 and the panel 100 , for example. In some embodiments, the aforementioned diffuser component 14 and/or grating component 16 can be selectively disposed between the reflective composite layer 17 and the third optical component 13, and the grating component 16 can be disposed, for example, between the reflective composite layer 17 and the diffuser Between components 14. In other embodiments (not shown in the figure), an adhesive layer can be optionally provided between the reflective composite layer 17 and the grating component 16 or between the grating component 16 and the diffuser component 14 to adhere to each other, but not limited thereto. In some embodiments, the reflective composite layer 17 may include dual brightness enhancement film (DBEF) and reflective polarizer film (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.

FIG. 8 is a cross-sectional view of an electronic device according to an embodiment of the present invention. Wherein, the electronic device of FIG. 8 is similar to that of FIG. 1 except for the following differences.

The backlight module 200 shown in FIG. 8 may further include a light absorbing layer 401 and a fourth optical component 402. The light absorbing layer 401 may be disposed under the light guide plate 10, for example, that is, the light guide plate 10 may be disposed between the light absorbing layer 401 and the panel 100, for example. between. In some embodiments, the fourth optical component 402 can be disposed between the light guide plate 10 and the light absorbing layer 401 , for example. In some embodiments, there may 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 may have a fourth prism structure 4021, and the fourth prism structure 4021 faces the light guide plate 10, for example, more specifically, the fourth prism structure 4021 may have a plurality of fourth strip structures 4021a and a surface 402b are opposite to the plurality of fourth strip structures 4021a, and the so-called fourth prism structure 4021 faces the light guide plate 10 because the fourth strip structure 4021a is closer to the light guide plate 10 than the surface 402b. In some embodiments, the light emitting components 201 are arranged along the first direction Y, and the extending 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°≤angle≤93°). In more detail, the fourth prism structure 4021 may have a plurality of fourth strip structures 4021a, and the extension direction of the so-called 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 structure 4021a of the fourth prism structure 4021 may have a fourth vertex angle θ4, and the fourth vertex angle θ4 may be between 87° and 93° (87°≤θ4≤93° ) or between 89° and 91° (89°≤θ4≤91°), but not limited thereto. In some embodiments, the material or manufacturing method of the fourth optical component 402 may be similar to that of the first optical component 11 , the second optical component 12 and/or the third optical component 13 , and details are not repeated here.

As shown in the backlight module 200 shown in FIG. 8 , in some embodiments, the reflectivity of the light absorbing layer 401 may range from 0% to 25% (0%<reflectivity≤25%), or between 0% to 10% (0%<reflectance≤10%), but not limited thereto. In some embodiments, the absorbance of the light absorbing layer 401 can range from 75% to 100% (75%≤absorbance<100%), or between 90% to 100% (90%≤absorb rate <100%), but not limited thereto. In some embodiments, the material of the light-absorbing layer 401 may include high-light-absorbing materials, low-reflection materials, or combinations thereof, but is not limited thereto. In some embodiments, the material of the light absorbing layer 401 may include particles, paint, glue, other suitable materials or combinations thereof, but is not limited thereto. In some embodiments, the light absorbing layer 401 may include black organic material, black inorganic material, polyethylene terephthalate, black ink, black tape, other suitable materials or combinations thereof, but is not limited thereto. In some embodiments, the light absorbing layer 401 can be formed by a chemical vapor deposition process, a coating process, an evaporation process, an electroplating process, a sputtering process, a bonding process, a printing process, a baking process or other suitable processes, but not limited to this. In some embodiments, the light-absorbing layer 401 can be used to reduce the chance of stray light emitted from the bottom surface of the light guide plate 10 (that is, the side close to the light-absorbing layer 401 ) being reflected back to the light guide plate 10, thereby reducing the brightness at a large viewing angle, or improving the positive The contrast of the viewing angle or the brightness of the positive viewing angle can be improved. For example, the normal direction Z of the panel 100 may be 0 degrees, and the normal viewing angle is within a range of plus or minus 30 degrees (or 40 degrees) between the normal direction Z of the panel 100 , but it is not limited thereto.

FIG. 9 is a cross-sectional view of an electronic device according to an embodiment of the present invention. Wherein, the electronic device of FIG. 9 is similar to that of FIG. 1 except for the following differences.

The backlight module 200 shown in FIG. 9 may include a reflective structure 40 and a fourth optical component 402. The reflective structure 40 may be disposed under 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 refer to the above description of the reflective structure 40 in FIG. 1 , and will not be repeated here. In some embodiments, the reflective structure 40 may include a reflective polarizer film (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 may have a fourth prism structure 4021, and the fourth prism structure 4021 faces the light guide plate 10, more specifically, the fourth prism structure 4021 may have a plurality of fourth strip structures 4021a and the surface 402b is relative to the plurality of fourth strip structures 4021a, and the so-called fourth prism structure 4021 is closer to the light guide plate 10 because the fourth strip structures 4021a are closer to the surface 402b Light guide plate 10. The fourth strip structure 4021a of the fourth prism structure 4021 may have a fourth vertex angle θ4, and the structure or material of the fourth vertex angle θ4 may be as described above in FIG. 8 , and will not be repeated here.

FIG. 10A is a partial perspective view of an electronic device according to an embodiment of the present invention. Fig. 10B is a cross-sectional view of the line segment I-I' in Fig. 10A. Wherein, the electronic device of this embodiment is similar to that of FIG. 1 except for the following differences.

In this embodiment, as shown in FIG. 10A, the third optical component 13 has a third prism structure 131, the third prism structure 131 faces the panel 100 (as shown in FIG. 1), and the third prism structure 131 may have a plurality of third strips prism structure 131a and the surface 131b corresponding to the third prism structure 131a, wherein the extension direction of the third prism structure 131 may be perpendicular to the first direction Y, for example.

In more detail, as shown in FIG. 10A, the third strip structure 131a may include a plurality of sharp-angled strip structures S1 and a plurality of rounded-cornered strip-shaped structures S2, wherein the sharp-angled strip-shaped structures S1 and the rounded-cornered strip structures S2 is arranged along the first direction Y, and one of the plurality of strip structures S2 is disposed between two adjacent plurality of sharp-angled strip structures S1. In some embodiments, one to eight sharp-corner strip structures S1 can be disposed between two adjacent round-corner strip structures S2. For example, in FIG. 10A , two sharp-corner strip structures S1 are disposed between two adjacent round-corner strip structures S2 , but it is not limited thereto. In other words, in a cross-sectional view, as shown in FIG. 10B , the third prism structure 131a may include a plurality of sharp corner portions P1 and a plurality of round corner portions P2, and the sharp corner portions P1 and round corner portions P2 are along the first direction Y Arranged, and one of the multiple rounded corners P2 is arranged between two adjacent sharp corners P1, wherein the sharp corner strip structure S1 can correspond to the sharp corner part P1, and the rounded corner strip structure S2 can be Corresponding to the fillet part P2. In some embodiments, one to eight sharp corner portions P1 can be disposed between two adjacent round corner portions P2. For example, in FIG. 10B , two sharp corner portions P1 can be disposed between two adjacent round corner portions P2 , but it is not limited thereto.

In addition, as shown in FIG. 10A and FIG. 10B , in the normal direction Z of the panel 100, the height of the rounded strip structure S2 (that is, the height from the top T2 of the rounded part P2 to the surface 131b of the third optical component 13) The height is smaller than the height of the pointed strip structure S1 (ie, the height from the tip T1 of the pointed portion P1 to the surface 131b of the third optical component 13 ). In some embodiments, the height of the rounded strip structure S2 (that is, the height from the top T2 of the rounded portion P2 to the surface 131b of the third optical component 13 ) is the same as the height of the pointed strip structure S1 (that is, the pointed portion P1 There is a height difference H1 between the top T1 of the top end T1 and the height of the surface 131b of the third optical component 13), wherein the height difference H1 is greater than 0 micrometers (μm) and less than or equal to 2 micrometers (μm) (that is, 0 μm<height difference H1≤2μm), but not limited thereto.

In some embodiments, as shown in FIG. 10B , the pointed portions P1 may respectively have a fifth vertex angle θ5, wherein the fifth vertex angle θ5 may be between 87° and 93° (87°≤the fifth vertex angle θ5≤93°) or between 88° and 92° (88°≤the fifth vertex angle θ5≤92°), but not limited thereto. The rounded corner portions P2 may respectively have a radius of curvature R, wherein the radius of curvature R may be greater than or equal to 3 microns (μm) and less than or equal to 5 microns (μm) (ie, 3 μm≤curvature radius R≤5 μm). In addition, in some embodiments, the pitch PI between two adjacent third strip structures 131a may be between 18 μm and 50 μm (18 μm≤pitch PI≤50 μm), wherein the “two adjacent The distance between the third bar-shaped structures" refers to the distance in the first direction Y between the top T1 of the pointed part P1 and the top T1 of the adjacent pointed part P1, or refers to the pointed part P1 The distance in the first direction Y between the top end T1 of and the top end T2 of the adjacent fillet portion P2.

In some embodiments, the surface 131b of the third optical component 13 can be a rough surface, and the haze (Haze) of the surface can be between 1% and 10% (1%≤haze≤10%), but not limited to this. In some embodiments, the haze of the surface 131b of the third optical component 13 can be prepared by embossing, sandblasting or other suitable processes, but is not limited thereto. In addition, in some embodiments, the surface 131b of the third optical component 13 may be a smooth surface, and the smooth surface may be formed by a hard coating or a PET surface.

In this embodiment, as shown in FIG. 1, 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, the backlight module 200 may not include the diffuser 14 shown in FIG. 1 . In addition, in some other embodiments, the backlight module 200 may not include the diffusion component 14 shown in FIG. 1 , but include a diffusion component 14-1 as shown in FIG. 3A and FIG. Between the component 11 and the light guide plate 10 , the haze of the diffusion component 14 - 1 can be between 80% and 100% (80%≤haze≤100%). In some embodiments, the diffusion component 14 can be used to disperse the light emitted by the light source 20 to make the brightness of the backlight module 200 more uniform; limited to this.

FIG. 11 is a schematic perspective view of a third optical component according to an embodiment of the present invention. Wherein, the third optical assembly of FIG. 11 is similar to that of FIG. 10A except for the following differences.

As shown in FIG. 10A, the third strip structure 131a of the third prism structure 131 can be a regular structure. In more detail, the third strip structure 131a can have a top edge e1, the top edge e1 can be a straight line, and can be perpendicular to the first direction Y. In other words, the top edge e1 may be parallel to the extending direction of the third prism structure 131a.

In this embodiment, as shown in FIG. 11, the third strip structure 131a of the third prism structure 131 can be an irregular structure. In more detail, the third strip structure 131a can have a top edge e2, and the top edge e2 It may not be a straight line, for example, may contain arcs, or other irregular lines. In other words, there may be an angle between the top edge e2 and the extending direction of the third prism structure 131a.

Wherein, the top edge e1 of the third strip structure 131a in FIG. 10A refers to the continuation line of the top end T1 of the sharp corner portion P1 or the top end T2 of the rounded corner portion P2 in the direction X perpendicular to the first direction Y in FIG. 10B . Similarly, the top edge e2 of the third strip structure 131a in FIG. 11 refers to the continuation of the top T1 of the fingertip corner part P1 or the top T2 of the round corner part P2 in the direction X perpendicular to the first direction Y in FIG. 10B Wire.

The backlight module 200 of the present invention can be applied to various electronic devices that require a display panel, and the display panel can be, for example, a flexible display panel, a touch display panel, or a curved display panel. display panel) or tiled display panel, but not limited thereto. The electronic device of the present invention can be, for example, a monitor, a mobile phone, a notebook computer, a video camera, a camera, a music player, a mobile navigation device, a television, and other electronic devices that need to display images, but the present invention is not limited thereto.

The above specific examples should be construed as merely illustrative and not restrictive of the remainder of the disclosure in any way.

Claims (17)

1. An electronic device, characterized in that it comprises: a panel; and A backlight module is arranged relative to the panel and includes: a light guide plate; A first optical component is arranged 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; and A third optical component is arranged on the second optical component and has 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. 2. The electronic device according to claim 1, wherein the backlight module further comprises a light source, the light source comprises a plurality of light-emitting components, and the light-emitting components are arranged along a first direction, wherein the second prism The extending direction of the structures is parallel to the first direction, and the extending directions of the first prism structure and the third prism structure are perpendicular to the first direction. 3. The electronic device according to claim 1, wherein the first prism structure has a first vertex angle, the second prism structure has a second vertex angle, and the third prism structure has a third vertex angle , wherein, the first vertex angle and the third vertex angle are respectively between 87° and 93°, and the second vertex angle is between 50° and 60°. 4. The electronic device according to claim 1, wherein a surface of the second optical component adjacent to the light guide plate is a rough surface, and the haze of the rough surface is between 3% and 15%. 5. The electronic device according to claim 1, wherein the backlight module further comprises a diffusion component disposed on the third optical component, wherein the haze of the diffusion component is between 5% and 50%. . 6. The electronic device according to claim 5, wherein the backlight module further comprises another diffusion component disposed between the first optical component and the light guide plate, wherein the haze of the another diffusion component Between 5% and 50%. 7. The electronic device according to claim 1, wherein the backlight module further comprises an adhesive layer, wherein the adhesive layer is disposed between the first optical component and the second optical component, or disposed between the Between the second optical component and the third optical component. 8. The electronic device according to claim 1, wherein the backlight module further comprises a grating component disposed between the third optical component and the panel. 9. The electronic device according to claim 1, wherein the backlight module further comprises a reflective composite layer disposed between the third optical component and the panel. 10. The electronic device according to claim 1, wherein the backlight module further comprises: a light absorbing layer, wherein the light guide plate is disposed between the light absorbing layer and the panel; and a fourth optical component, arranged between the light guide plate and the light absorbing layer, Wherein, the fourth optical component has a fourth prism structure, and the fourth prism structure faces the light guide plate. 11. An electronic device, characterized in that it comprises: a panel; and A backlight module is arranged relative to the panel and includes: a light guide plate; a first optical component arranged 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 has a third prism structure and a surface opposite to the third prism structure; Wherein, the third prism structure includes a plurality of sharp corners and a plurality of rounded corners, one of the plurality of rounded corners is arranged between two adjacent sharp corners, in the normal direction of the panel Above, the height of one of the rounded corners to the surface of the third optical component is smaller than the height of one of the sharp corners to the surface of the third optical component. 12. The electronic device according to claim 11, wherein the height of one of the rounded corners to the surface of the third optical component is the same as the height of one of the sharp corners to the third optical component. There is a height difference between the heights of the surfaces of the optical component, wherein the height difference is greater than 0 microns and less than or equal to 2 microns. 13 . The electronic device according to claim 11 , wherein the rounded corner portions respectively have a curvature radius, wherein the curvature radius is greater than or equal to 3 micrometers and less than or equal to 5 micrometers. 14 . 14. The electronic device as claimed in claim 11, wherein one to eight of the sharp corner portions are disposed between two adjacent round corner portions. 15. The electronic device according to claim 11, wherein the surface of the third optical component is a rough surface, and the haze of the rough surface is between 1% and 10%. 16. The electronic device according to claim 11, wherein the backlight module further comprises a diffusion component disposed on the third optical component, wherein the haze of the diffusion component is between 1% and 30%. . 17. The electronic device according to claim 11, wherein the backlight module further comprises another diffusion component disposed between the first optical component and the light guide plate, wherein the haze of the another diffusion component Between 80% and 100%.

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