CN114660697A

CN114660697A - Backlight module and display device

Info

Publication number: CN114660697A
Application number: CN202011534609.9A
Authority: CN
Inventors: 郭家豪
Original assignee: Individual
Current assignee: Innolux Corp
Priority date: 2020-12-23
Filing date: 2020-12-23
Publication date: 2022-06-24

Abstract

The invention provides a backlight module and a display device, the backlight module comprises a light guide plate, a reflection assembly, a reflection reducing assembly and a light source, wherein the light guide plate comprises a surface which is provided with a main area and a peripheral area surrounding the main area, the reflection assembly is adjacent to the surface and is arranged corresponding to the main area, the reflection reducing assembly is adjacent to the surface and is arranged corresponding to the peripheral area, the light source emits light to one side edge of the light guide plate, and in addition, the reflectivity of the reflection reducing assembly is smaller than that of the reflection assembly.

Description

Backlight module and display device

Technical Field

The present invention relates to a backlight module and a display device including the same, and more particularly, to a backlight assembly having a reflection reducing member.

Background

Electronic products equipped with a display panel have become an indispensable necessity in modern society. With the vigorous development of these portable electronic products, consumers have great expectations on the quality, function and price of these products.

However, electronic products (such as display devices) do not meet the expectations of consumers in all aspects, for example, the conventional display devices have a light leakage problem, which affects the display quality, and the problem is more serious for the display devices with narrow frames. Therefore, there is a need to develop structural designs that can improve the performance of these display devices.

Disclosure of Invention

According to some embodiments of the present invention, a backlight module is provided, including a light guide plate, a reflection assembly, a reflection reducing assembly and a light source, wherein the light guide plate includes a surface having a main area and a peripheral area surrounding the main area, the reflection assembly is disposed adjacent to the surface and corresponding to the main area, the reflection reducing assembly is disposed adjacent to the surface and corresponding to the peripheral area, the light source emits light to a side edge of the light guide plate, and further, a reflectivity of the reflection reducing assembly is smaller than a reflectivity of the reflection assembly.

According to some embodiments of the present invention, a display device is provided, the display device comprising a backlight module, the backlight module comprising a light guide plate, a reflective element, a reflection reducing group, and a light source, the light guide plate comprising a surface having a main area and a peripheral area surrounding the main area. The reflection assembly is arranged adjacent to the surface and corresponding to the main area, the reflection reducing assembly is arranged adjacent to the surface and corresponding to the surrounding area, the light source emits light to one side of the light guide plate, and in addition, the reflectivity of the reflection reducing assembly is smaller than that of the reflection assembly.

In order to make the features and advantages of the present invention comprehensible, several embodiments accompanied with figures are described in detail below.

Drawings

The invention will be more fully understood from a reading of the following detailed description and examples and a reference to the accompanying drawings, in which:

FIG. 1 is a schematic top view of a display device according to some embodiments of the present disclosure;

FIG. 2 is a schematic cross-sectional view of the display device along section line A-A' of FIG. 1 according to some embodiments of the present invention;

FIG. 3 is a schematic cross-sectional view of the display device along line A-A' of FIG. 1 according to some embodiments of the present invention;

FIG. 4 is a schematic diagram showing measurement of light intensity of a device in some embodiments of the invention;

FIG. 5 is a graph showing the measurement of light intensity of a display device according to some embodiments of the present invention;

FIG. 6 is a schematic top view of a display device according to some embodiments of the present invention;

FIG. 7 is a schematic top view of a display device according to some embodiments of the present invention;

FIG. 8 is a schematic top view of a display device according to some embodiments of the present invention;

FIG. 9 is a schematic top view of a portion of a display device in accordance with some embodiments of the present invention;

FIG. 10 is a schematic cross-sectional view of a portion of the display device along line B-B' of FIG. 9 in accordance with some embodiments of the present invention;

FIG. 11 is a cross-sectional view of a portion of the display device along line B-B' of FIG. 9 according to some embodiments of the present invention.

Description of the symbols

10 display device

100 backlight module

100A active (active) region

100B peripheral area

102 light guide plate

102a, 102b sides

102s surface

102M main area

102p mesh point

102P surrounding area

104 reflective component

106 casing assembly

108 frame

110 reflection reducing assembly

110a first adhesive layer

110b second adhesive layer

110bs top surface

110s base layer

110ss top surface

120 optical film layer

300 display panel

302a first substrate

302b second substrate

304a first polarizing plate

304b second polarizing plate

310 display medium layer

A-A ', B-B': transversal

DA display area

L0, L0' light

LS light source

NA non-display area

OP overlap region

SA, SB, SC, SD, SE points

W1 first Width

W2 second Width

W3 third Width

Angle theta 1, theta 2

Detailed Description

The backlight module and the display device according to the embodiments of the present invention are described in detail below. In the following detailed description, for purposes of explanation, numerous specific details are set forth and embodiments are set forth in order to provide a thorough understanding of the present invention. The particular features and arrangements of parts described in the following detailed description are merely illustrative of some embodiments of the invention. It should be apparent that these exemplary embodiments are only examples and are not limiting of the present invention. Moreover, similar and/or corresponding elements may be labeled with similar and/or corresponding reference numerals in different embodiments in order to clearly describe the invention. However, the use of such like and/or corresponding reference numerals is merely for simplicity and clarity in describing some embodiments of the invention and does not represent any correlation between the various embodiments and/or structures discussed.

It is understood that relative terms, such as "lower" or "bottom" or "upper" or "top," may be used in connection with the embodiments to describe one element's relative relationship to another element of the figures. It will be understood that if the device of the drawings is turned over with its top and bottom portions reversed, the elements described as being on the "lower" side will be turned over to those on the "higher" side. The embodiments of the present invention can be understood together with the accompanying drawings, which are incorporated in and constitute a part of this specification. It is to be understood that the drawings of the present invention are not to scale and that structures and devices are schematically depicted to simplify the drawing.

Further, it should be understood that although the terms first, second, third, etc. may be used herein to describe various elements, components, or sections, these elements, components, or sections should not be limited by these terms. These terms are only used to distinguish one element, component, or section from another. Thus, a first element, component, or section discussed below could be termed a second element, component, or section without departing from the teachings of the present invention.

As used herein, the term "about" or "approximately" or "substantially" generally means within 10%, or within 5%, or within 3%, or within 2%, or within 1%, or within 0.5% of a given value or range. The quantities given herein are approximate quantities, that is, the meanings of "about", "about" and "substantially" are implied unless otherwise specified. Furthermore, the term "range from a first value to a second value" or "between" means that the range includes the first value, the second value, and other values in between.

While certain terms are used throughout the description and following claims to refer to particular elements, those skilled in the art will appreciate that electronic device manufacturers may refer to the same elements by different names. This summary is not intended to distinguish between components that have the same function but are not necessarily named differently. In the following description and claims, the terms "include" and "comprise" are used in an open-ended fashion, and thus should be interpreted to mean "include, but not limited to.

In some embodiments of the present invention, unless specifically defined otherwise, terms related to attachment, coupling, and the like, such as "connected" and "interconnected," may mean that two structures are in direct contact, or may mean that two structures are not in direct contact and that another structure is present between the two structures.

In addition, the following description "a first element is disposed on a second element" includes the first element and the second element being in direct contact, or another element being disposed between the first element and the second element such that they are not in direct contact. The expression "the second element is disposed between the first element and the third element" includes the second element being in direct contact with the first element and/or the third element, or another element being disposed between the second element and the first element and/or the third element, and the first element and the second element not being in direct contact, or the second element and the third element not being in direct contact.

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 will be 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 invention and will not be interpreted in an idealized or overly formal sense unless expressly so defined herein.

According to some embodiments of the present invention, a backlight module including a reflection-reducing element (i.e., a reflection-reducing element) is provided, which can reduce light leakage in a peripheral region of the backlight module and improve display quality of the display device.

Referring to fig. 1, fig. 1 is a schematic top view of a display device 10 according to some embodiments of the present disclosure. It should be understood that only some elements of the display device 10 (some elements of the backlight module 100) are shown in fig. 1 for clarity of illustration. According to some embodiments, additional features or elements may be optionally added to display device 10. According to some embodiments, some features of the display device 10 described below may be selectively replaced or omitted.

According to some embodiments, the display device 10 may include, for example, a liquid crystal (liquid crystal) display device, a light-emitting diode (light-emitting diode) display device, such as an inorganic light-emitting diode (inorganic light-emitting diode) display device, an organic light-emitting diode (OLED) display device, a sub-millimeter light-emitting diode (mini LED) display device, a micro light-emitting diode (micro LED) display device, or a Quantum Dot (QD) light-emitting diode (which may be, for example, a QLED or QDLED) display device. According to some embodiments, the liquid crystal display device may include a backlight module (backlight module). The backlight module may include light emitting diodes, such as inorganic light emitting diodes, organic light emitting diodes, sub-millimeter light emitting diodes, micro light emitting diodes or quantum dot light emitting diodes (such as QLED or QDLED), fluorescent (fluorescent), phosphorescent (phor), or other suitable materials, or a combination thereof, but is not limited thereto. The display device 10 can be any arrangement combination of the foregoing, and the display device 10 of the present invention will be described below by taking a liquid crystal display device as an example, but the present invention is not limited thereto.

As shown in fig. 1, the display device 10 may include a backlight module 100, and the backlight module 100 may include a light guide plate 102 and a light source LS adjacent to the light guide plate 102, the light source LS emitting light L0 to a side edge 102a of the light guide plate 102. In addition, the display device 10 may include a reflection reducing component 110. According to some embodiments, the down-reflecting member 110 may be disposed adjacent to a side of the light guide plate 102 opposite to the side 102 a. According to some embodiments, the reflection reducing member 110 may partially overlap the light guide plate 102, for example, as shown in fig. 1, an overlapping area OP of the reflection reducing member 110 and the light guide plate 102. According to other embodiments, the antireflective member 110 may not overlap with the light guide plate 102.

Specifically, referring to fig. 2 for details of the structure of the display device 10, fig. 2 shows a schematic cross-sectional structure of the display device 10 along the sectional line a-a' of fig. 1 according to some embodiments of the present invention. The display device 10 may include a backlight module 100, and the backlight module 100 may include a light guide plate 102, a reflective element 104, and a reflection reducing element 110. According to some embodiments, the light guide plate 102 may guide the light L0 emitted from the light source LS to the display panel 300 of the display device 10. According to some embodiments, the reflective member 104 may be used to reflect light L0 emitted from the light source LS to the light guide plate 102 or to reflect light L0 escaping from the light guide plate 102 back. According to some embodiments, the retro-reflective component 110 may reduce the reflection of light, for example, reducing light L0 to light L0'. According to some embodiments, the down-reflecting member 110 may be disposed on a side 102b opposite to the side 102a where the light source LS emits light to the light guide plate 102.

As shown in fig. 2, the light guide plate 102 may have a surface 102s, the surface 102s is adjacent to the reflective member 104, and the surface 102s may be a bottom surface of the light guide plate 102. In addition, the surface 102s may have a main region 102M and a peripheral region 102P, the peripheral region 102P surrounding the main region 102M. The reflective element 104 can be disposed adjacent to the surface 102s and corresponding to the main region 102M, but is not limited thereto. The reflective element 104 may extend to the surrounding region 102P. The down-reflecting component 110 may be disposed adjacent to the surface 102s and corresponding to the surrounding region 102P.

According to some embodiments of the present invention, the peripheral region 102P refers to a region of the surface 102s of the light guide plate 102 within a distance of 5 millimeters (mm) (e.g., 4mm, 3mm, or 2mm) from the side edge 102b of the light guide plate 102, but is not limited thereto.

According to some embodiments, the expression "the reflective element 104 is disposed corresponding to the main region 102M" means that the reflective element 104 at least partially overlaps the main region 102M in a normal direction (e.g., a Z direction shown in the drawing) of the light guide plate 102. Similarly, according to some embodiments, the expression "the reflection reducing element 110 is disposed corresponding to the surrounding region 102P" means that the reflection reducing element 110 at least partially overlaps the surrounding region 102P in a normal direction (e.g., a Z direction shown in the drawings) of the light guide plate 102.

According to some embodiments, a portion of the reflective element 104 may overlap the surrounding region 102P in a normal direction (e.g., the Z direction shown in the figures) of the light guide plate 102.

According to some embodiments, the light guide plate 102 may include dots 102p formed on the surface 102 s. In some examples, dots 102p may protrude outward from surface 102s, that is, dots 102p may protrude from surface 102s toward reflective component 104, but are not limited to such. As shown in fig. 2, the dots 102p can change the angle of light (indicated by the dotted line) to reduce the total reflection of light, for example, as shown in fig. 2, the angle θ 1 of light L0 passing through the reflective element 104 is different from the angle θ 2 of light L0 passing through the dots 102p, but the total reflection of light can be reduced by disposing the dots 102p, but is not limited thereto. According to some embodiments, the material of the light guide plate 102 may include glass, polymethyl methacrylate (PMMA), Cyclic Olefin Polymer (COP), Polycarbonate (PC), other suitable materials, or a combination of the foregoing.

According to some embodiments, the reflective element 104 may be in contact with the dots 102p of the light guide plate 102, and an air gap may exist between the light guide plate 102 and the reflective element 104. According to some embodiments, the material of the reflective component 104 may include a material having a high reflectivity, such as a material having a reflectivity greater than 85%, such as greater than 85% and less than 100% (i.e., 85% < reflectivity < 100%), but is not so limited. According to some embodiments, the material of the reflective element 104 may include, but is not limited to, metal, white ink, white tape, other suitable reflective materials, or combinations of the foregoing.

According to some embodiments, the reflection reducing member 110 may be in contact with the light guide plate 102, but is not limited thereto. According to some embodiments, the surface 102s of the light guide plate 102 may be adhered to the down-reflecting member 110. According to some embodiments, the retro-reflective component 110 may be in contact with the reflective component 104.

In addition, as shown in fig. 2, according to some embodiments, the reflection reducing assembly 110 may include a first adhesive layer 110a and a base layer 110s, and the base layer 110s is disposed on the first adhesive layer 110 a. According to some embodiments, the antireflection element 110 may further include a second adhesive layer 110b, and the base layer 110s may be disposed between the first adhesive layer 110a and the second adhesive layer 110 b. In other words, according to some embodiments, the reflection reducing assembly 110 may not include the second glue layer 110 b. According to some embodiments, the second adhesive layer 110b or the base layer 110s may be in contact with the light guide plate 102.

According to some embodiments, the first adhesive layer 110a and the second adhesive layer 110b may include a photo-curable adhesive, a thermal-curable adhesive, a photo-curable adhesive, a moisture-curable adhesive, an adhesive tape, other suitable materials, or a combination thereof, but are not limited thereto. According to some embodiments, the first adhesive layer 110a and the second adhesive layer 110b may include Optically Clear Adhesive (OCA), Optically Clear Resin (OCR), other suitable materials, or combinations thereof. According to some embodiments, the material of the base layer 110s may include, but is not limited to, paint, metal, resin, other suitable materials, or combinations of the foregoing. According to some embodiments, the color of the base layer 110s may include black, white, gray, silver, transparent, or a combination of the foregoing, but is not limited thereto. According to some embodiments, the fabrication process for forming the substrate layer 110s may include a coating fabrication process, a printing fabrication process, or a combination of the foregoing, but is not limited thereto. In addition, it is noted that the reflectivity of the reflection reducing component 110 is less than the reflectivity of the reflection component 104. Specifically, according to some embodiments, the reflectivity of the down-reflecting component 110 may be less than or equal to 85% (i.e. the reflectivity is less than or equal to 85%), as shown in fig. 2, the down-reflecting component 110 may reduce the intensity of the reflected light (indicated by the dotted line), as shown in fig. 2, for example, the intensity of the light reflected by the light L0 through the reflecting component 104 is different from the intensity of the light reflected by the light L0' through the down-reflecting component 110, and therefore, the light leakage of the surrounding area 102P may be reduced.

Specifically, according to some embodiments, the ratio of the reflectivity of the retro-reflective component 110 to the reflectivity of the reflective component 104 can be greater than or equal to 3% and less than or equal to 85% (3% ≦ 85% ratio of the reflectivity of the retro-reflective component to the reflectivity of the reflective component), or greater than or equal to 5% and less than or equal to 80%, or greater than or equal to 5% and less than or equal to 60%, for example, 5%, 8%, 10%, 20%, 30%, 40%, 50%, 60%, or 70%, but is not limited thereto.

According to embodiments of the present invention, "reflectivity" refers to the intensity of light reflected by a light source divided by the intensity of incident light (incident light) from the light source (e.g., including ambient light, such as light emitted by a measurement instrument). According to an embodiment of the present invention, "light intensity" refers to a spectral integral of light. For example, the light source may include visible light (e.g., wavelength between 380nm to 780nm or between 400nm to 700 nm), but is not limited thereto.

It should be understood that, according to the embodiment of the present invention, the reflectance of the antireflective element 110 may be measured, for example, after the antireflective element 110 is disposed on the frame 108 and the second adhesive layer 110b is removed (if the antireflective element 110 includes the second adhesive layer 110 b). According to the embodiment of the invention, the reflectivity of the reflective member 104 may be measured, for example, after it is disposed on the frame 108 and the housing assembly 106 and the light guide plate 102 are removed.

According to some embodiments, the reflectance of the retro-reflective component 110 or the reflective component 104 may be measured using a spectrophotometer (e.g., CM-508d) or other reflectance measuring instrument. The reflectance is obtained in a Specular Component Included (SCI) measurement mode, which includes measurement of Specular reflection light and measurement of diffuse reflection light.

According to some embodiments, the reflectivities of the reflection reducing assembly 110 and the reflection assembly 104 measured according to the foregoing are shown in table 1. Examples 1-4 show the reflectivity of the anti-reflective element 110 comprising a white base layer, a silver base layer, a transparent base layer, and a black base layer. Example 5 shows the reflectivity of the reflective member 104.

TABLE 1

It should be appreciated that if the ratio of the reflectivity of the retro-reflective element 110 to the reflectivity of the reflective element 104 is too large (e.g., greater than 85%), the difference in reflectivity between the retro-reflective element 110 and the reflective element 104 is too small such that the effect of reducing light leakage may not be significant. On the other hand, if the ratio of the reflectivity of the down-reflecting element 110 to the reflectivity of the reflecting element 104 is too small (e.g., less than 3%), dark bands (dark bands) may occur in the boundary region of the display in the bright state.

Referring to fig. 2, according to some embodiments, the display device 10 may further include a housing assembly 106, the housing assembly 106 being disposed adjacent to the light guide plate 102. According to some embodiments, the housing component 106 may be in contact with the light guide plate 102 and/or the reflective component 104. According to some embodiments, the housing assembly 106 may be used to carry the display panel 300 disposed above, and the housing assembly 106 may serve as a structural element to fix components (e.g., the light guide plate 102) of the backlight module 100.

According to some embodiments, "adjacent" may be one element located near or one element near another element. The following description "a first element is disposed adjacent to a second element" may include the case where the first element is adjacent to and in direct contact with the second element, the first element is adjacent to and not in direct contact with the second element, or no intervening elements are present between the first element and the second element.

According to some embodiments, the housing component 106 may include, but is not limited to, an insulating material, a cushioning material, a protective material, an adhesive material, other suitable materials, or combinations of the foregoing.

According to some embodiments, the display device 10 may further include a frame 108 and an optical film 120, and the reflection reducing element 110 and the reflection element 104 may be disposed on the frame 108. According to some embodiments, the housing assembly 106 may be disposed on the frame 108. According to some embodiments, the optical film layer 120 may be disposed between the light guide plate 102 and the display panel 300, and the optical film layer 120 may include one or more optical films.

According to some embodiments, the material of the frame 108 may include, but is not limited to, metal, plastic, ceramic, other suitable materials, or a combination of the foregoing. According to some embodiments, the optical film layer 120 may include a reflective film, a diffuser film, a brightness enhancement film (light enhancement film), an inverse prism (inverted prism) film, a reflective polarization brightness enhancement film (dual light enhancement film), other suitable optical films, or a combination of the foregoing, but is not limited thereto.

In addition, as mentioned above, the display device 10 may include the display panel 300, and the display panel 300 may be disposed on the backlight module 100. According to some embodiments, the display panel 300 may include a first substrate 302a, a second substrate 302b, and a display medium layer 310 disposed between the first substrate 302a and the second substrate 302 b.

According to some embodiments, the material of the first substrate 302a and the second substrate 302b may include glass, quartz, sapphire (sapphire), ceramic, Polyimide (PI), liquid-crystal polymer (LCP) material, Polycarbonate (PC), polyethylene terephthalate (PET), other suitable materials, or a combination thereof, but is not limited thereto. According to some embodiments, the first substrate 302a and/or the second substrate 302b may include a Printed Circuit Board (PCB). In addition, the material of the first substrate 302a may be the same as or different from the material of the second substrate 302 b.

According to some embodiments, the material of the display medium layer 310 may include nematic liquid crystal (nematic), smectic liquid crystal (nematic), blue phase liquid crystal (blue phase), cholesteric liquid crystal (cholesteric), other suitable liquid crystal material, or a combination thereof, but is not limited thereto.

In addition, according to some embodiments, the display panel 300 may further include a first polarizing plate 304a and a second polarizing plate 304 b. The first and second

polarizing plates

304a and 304b may be disposed on the first and

second substrates

302a and 302b, respectively.

According to some embodiments, the material of the first and

second polarizers

304a and 304b may include polyvinyl alcohol (PVA) or other suitable materials, but is not limited thereto. For example, according to some embodiments, the first and

second polarizers

304a and 304b may include two protective films and a polyvinyl alcohol film interposed between the protective layers, for example, the protective layers may include a triacetyl cellulose (TAC) film, but is not limited thereto.

It is understood that, according to various embodiments, the display panel 300 may further include an alignment layer, a light shielding layer, a color filter layer, a spacer, a driving device, or a combination thereof, but is not limited thereto.

Referring to fig. 3, fig. 3 is a schematic cross-sectional view of a display device along line a-a' of fig. 1 according to another embodiment of the present invention. In addition, the same or similar components (or elements) as those described above will be denoted by the same or similar reference numerals, and the materials, manufacturing methods and functions thereof will be the same or similar to those described above, so that the detailed description thereof will not be repeated.

As shown in fig. 3, according to some embodiments, the backlight module 100 may include an active region 100A and a peripheral region 100B surrounding the active region 100A. According to some embodiments, the active area 100A and the peripheral area 100B may substantially correspond to the display area DA and the non-display area NA of the display device 10. According to some embodiments, the antireflection element 110 may be disposed in the peripheral region 100B, and the reflection element 104 may be disposed in the active region 100A. According to some embodiments, the antireflective element 110 may not extend to the active region 100A. According to some embodiments, a portion of the reflective element 104 may be disposed in the peripheral region 100B. Furthermore, according to some embodiments, "a corresponds to B" may be considered as a projection area of a region partially or completely overlapping a projection area of B region, or a projection of a element partially or completely overlapping a projection of B element, or a combination thereof, in the same direction. For example, the active area 100A substantially corresponding to the display area DA may be regarded as a projection area of the active area 100A substantially overlapping with a projection area of the display area DA in the Z direction. In detail, in the display device 10, the pixels are arranged in rows or columns, and the display area DA is a maximum area defined by connecting the pixels in the same row and the same column.

According to some embodiments, a portion of the retro-reflective element 110 is disposed adjacent to the reflective element 104 and in the peripheral region 100B, and a portion partially overlapping the light guide plate 102 has a first width W1, in detail, a portion of the retro-reflective element 110 is disposed between the housing element 106 and the reflective element 104 and may have a first width W1, and another portion of the retro-reflective element 110 overlaps the housing element 106 in the Z direction. The portion of the retro-reflective element 110 is disposed between another portion of the retro-reflective element 110 and the reflective element 104. According to some embodiments, the reflective elements 104 in the peripheral region 100B have a second width W2. According to some embodiments, the first width W1 may be greater than or equal to the second width W2. Further, according to some embodiments, the ratio of the second width W2 to the first width W1 may range between 1: 1 to 1: 2 (1: 1. ltoreq. ratio. ltoreq.1: 2), for example, 1: 1.25, 1: 1.5 or 1: 1.75, but is not limited thereto.

According to some embodiments, the first width W1 refers to a maximum distance of a portion of the reflection reducing member 110 disposed adjacent to the reflection member 104 and partially overlapping the light guide plate 102 in a direction (e.g., a Y direction in the drawing) perpendicular to an extending direction of the reflection member 104. According to some embodiments, the second width W2 refers to a maximum distance of the reflective elements 104 in the peripheral region 100B in a direction perpendicular to the extending direction of the reflective elements 104 (e.g., the Y direction in the drawing). Further, the first width W1 and the second width W2 are measured along the same line segment.

According to some embodiments, the first width W1 refers to a maximum distance of a portion of the reflection reducing member 110 disposed adjacent to the reflection member 104 and partially overlapping the light guide plate 102 in a direction (e.g., an X direction in the drawing) perpendicular to a normal direction (e.g., a light emitting direction L0 in the drawing) of a light emitting surface of the light source LS. According to some embodiments, the second width W2 refers to a maximum distance of the reflection members 104 in the peripheral region 100B in a direction (e.g., an X direction in the drawing) perpendicular to a normal direction (e.g., a light emitting direction L0 in the drawing) of a light emitting surface of the light source LS.

Furthermore, according to embodiments of the present invention, the "extending direction" of the object refers to a direction along or substantially parallel to the long axis of the object. For example, the object may be surrounded by a minimum rectangle, and the extension direction of the long side of the minimum rectangle is the direction of the long axis.

In view of the foregoing, according to some embodiments, the display device 10 may include a display area DA and a non-display area NA, and the reflection reducing element 110 may be disposed corresponding to the non-display area NA. According to some embodiments, a portion of the light guide plate 102 may be disposed corresponding to the non-display area NA. Furthermore, according to some embodiments, the ratio of the first width W1 of the reflection reducing member 110 overlapping the light guide plate 102 to the third width W3 of the light guide plate 102 disposed corresponding to the non-display area NA may range from 1: 1.5 to 1: 3 (1: 1.5 ≦ 1: 3), such as 1: 2, 1: 2.3, or 1: 2.5, but is not limited thereto.

According to some embodiments, the third width W3 refers to a maximum distance of the light guide plate 102 in the non-display area NA in a direction (e.g., Y direction in the drawing) perpendicular to the extending direction of the reflective member 104. In addition, the third width W3 is substantially equal to the sum of the first width W1 and the second width W2.

According to some embodiments, the third width W3 refers to a maximum distance of the light guide plate 102 in the non-display area NA in a direction (e.g., X direction in the drawing) perpendicular to a normal direction of a light emitting surface of the light source LS. Direction of the light emitting surface of the light source LS. In addition, according to some embodiments, the peripheral region 102P of the light guide plate 102 may be disposed in the non-display region NA.

According to the embodiments of the present invention, the width and length of the assembly may be measured from the image of the optical microscope, and the thickness of the assembly may be measured from the sectional image in the electron microscope, but the present invention is not limited thereto. According to some embodiments, the width, length, thickness, or distance between elements may be measured using an Optical Microscope (OM), Scanning Electron Microscope (SEM), thin film thickness profile (α -step), ellipsometer, or other suitable means. In detail, according to some embodiments, after the modulation material layer 400 is removed, any cross-sectional image of the structure may be obtained by using a scanning electron microscope, and the height, thickness or distance between the elements in the image may be measured. According to some embodiments, any cross-sectional image including the component to be measured may be taken using a scanning electron microscope, and the width, length, thickness, or distance between components in the image may be measured.

Next, referring to fig. 4, fig. 4 is a schematic diagram illustrating a measurement of light intensity of a display device according to some embodiments of the invention. It should be understood that according to embodiments of the present invention, the light intensity of the display device (or backlight module) is measured when the display panel 300 and the housing assembly 106 are removed. According to the embodiment of the present invention, the light intensity of the display device is measured when the light guide plate 102, the reflection assembly 104, and the reflection reduction assembly 110 are disposed on the frame 108.

According to some embodiments, the light intensity of a display device or backlight module may be measured using a spectroradiometer (e.g., CS-1000) or other instrument that can measure light intensity. Furthermore, nit (nit) or cd/m²The light intensity is measured in units. The light intensity of a light source can be measured as the luminous intensity per unit area of light propagating in a given direction, which represents the light transmitted through or reflected from a particular areaAnd the amount of light falling within a given solid angle (solid angle). The light source may include, for example, ambient light or display light, but is not limited thereto.

According to some embodiments, the light intensity of the areas (e.g., the point SA, the point SB, the point SC, the point SD, and the point SE, etc.) near the boundary of the active area 100A and the peripheral area 100B may be measured. The dots SA are closest to the side edge 102b (i.e., the edge) of the light guide plate 102, and the dots SB, SC, SD, and SE are sequentially arranged beside the dots SA.

According to some embodiments, the widths of the points SA, SB, SC, SD, and SE may be adjusted according to the resolution of the spectroradiometer. According to some embodiments, the widths of the points SA, SB, SC, SD, and SE may be 3 millimeters. Specifically, the width of the point SA may be measured from the side edge 102b (i.e., edge) of the light guide plate 102.

According to some embodiments, the light intensity from point SA to point SE may be measured according to the above description. The percentage of the light intensity at the point SA (point SB, point SC, or point SD) to the light intensity at the point SE (i.e., the percentage of the light intensity at the point SA/SE, SB/SE, SC/SE) was obtained (based on the light intensity at the point SE, i.e., 100%), and the results are shown in table 2 and fig. 5. Examples 6 to 9 show the light intensity percentages of display devices comprising a white base layer, a silver base layer, a transparent base layer and a black base layer as the antireflection member 110, respectively.

TABLE 2

Percentage of light intensity (%)	Example 6	Example 7	Example 8	Practice ofExample 9
					Point SA	70	58	62	31
Point SB	72	72	76	73
					Point SC	89	89	89	86
Point SD	97	97	96	94
					Point SE	100	100	100	100

According to some embodiments, the ratio of the light intensity in the peripheral region 100B to the light intensity in the active region 100A may be greater than or equal to 20% and less than or equal to 80% (i.e., the ratio of the light intensity in the peripheral region to the light intensity in the active region is less than or equal to 80%, or greater than or equal to 30% and less than or equal to 70%. according to some embodiments, the light intensity in the peripheral region 100B refers to the light intensity taken from the point SA, and the light intensity in the active region 100A refers to the light intensity taken from the point SE.

As described above, the active area 100A and the peripheral area 100B substantially correspond to the display area DA and the non-display area NA of the display device 10. In other words, according to some embodiments, the ratio of the light intensity of the backlight module 100 corresponding to the non-display area NA to the light intensity of the backlight module 100 corresponding to the display area DA may be greater than or equal to 20% and less than or equal to 80% (i.e., 20% ≦ 80% for the ratio of the light intensity of the backlight module corresponding to the non-display area to the light intensity of the backlight module corresponding to the display area), or greater than or equal to 30% and less than or equal to 70%, but is not limited thereto.

Referring to fig. 6 to 8, fig. 6 to 8 are schematic top view structures of display devices according to some embodiments of the present disclosure. It should be understood that, for clarity, fig. 6 to 8 only show the light guide plate 102, the reflection reducing assembly 110 and the light source LS of the display device. As shown in fig. 6, the reflection reducing member 110 may be disposed along all side edges of the light guide plate 102. According to some embodiments, the down-reflecting member 110 may be continuously disposed adjacent to all four sides of the light guide plate 102, but is not limited thereto.

Furthermore, as shown in fig. 7, according to some embodiments, the reflection reducing members 110 may be discontinuous, and the reflection reducing members 110 may be discontinuously disposed along at least one side edge of the light guide plate 102. For example, according to some embodiments, the retro-reflective member 110 may be discontinuously disposed along two sides, three sides, or four sides of the light guide plate 102.

In addition, as shown in fig. 8, according to other embodiments, the reflection reducing member 110 may be disposed along a side of the light guide plate 102 except for the side 102a closest to the light source LS. In other words, according to other embodiments, the reflection reducing member 110 is not disposed along the side edge 102a closest to the light source LS.

Next, referring to fig. 9, fig. 9 is a schematic top view illustrating a portion of a display device according to some embodiments of the present disclosure. Specifically, fig. 9 illustrates a partial structure of the down-reflection assembly 110 disposed on the frame 108 near an edge region of the frame 108. As shown in fig. 9, the down-reflecting member 110 may be disposed along an edge region of the frame 108.

Referring to fig. 10 and 11, fig. 10 and 11 are schematic cross-sectional views of a portion of the display device along the line B-B' in fig. 9 according to some embodiments of the present invention. In view of the foregoing, according to some embodiments, the reflection reducing assembly 110 may include a base layer 110s, a first adhesive layer 110a and a second adhesive layer 110b, and the base layer 110s may be disposed between the first adhesive layer 110a and the second adhesive layer 110 a.

As shown in fig. 10, the second glue layer 110b may be patterned according to some embodiments. Specifically, according to some embodiments, the top surface 110bs of the reflection reducing component 110 (e.g., as shown in fig. 2) adjacent to the light guide plate 102 may be patterned.

As shown in fig. 11, according to other embodiments, the base layer 110s may be patterned. In detail, according to some embodiments, the top surface 110ss of the base layer 110s in contact with the second glue layer 110b may be patterned. According to some embodiments, the top surface 110bs of the second glue layer 110b may be substantially flat. According to some embodiments, the patterned second glue layer 110b or the base layer 110s may adjust the intensity of reflected light.

In summary, according to some embodiments of the present invention, the backlight module includes a reflection reducing element, and the reflection reducing element can reduce light leakage of the backlight module in the peripheral region, or improve display quality of the display device.

Although the present invention has been disclosed in conjunction with the above embodiments, it should be understood that many modifications, substitutions and alterations may be made thereto without departing from the spirit and scope of the invention as defined by the appended claims. Features of the embodiments of the invention may be combined and matched as desired without departing from the spirit or conflict of the invention. Moreover, the scope of the present application is not intended to be limited to the particular embodiments of the process, machine, manufacture, composition of matter, means, methods and steps described in the specification, but it is to be understood that any process, machine, manufacture, composition of matter, means, method and steps, presently existing or later to be developed, that will be obvious to one skilled in the art from this disclosure may be utilized according to the present application as many equivalents of the presently available embodiments of the present application are possible. Accordingly, the scope of the present application includes the processes, machines, manufacture, compositions of matter, means, methods, or steps described in the specification. The scope of the invention should be determined from the following claims. It is not necessary for any embodiment or claim of the invention to achieve all of the objects, advantages, and features disclosed herein.

Claims

1. A backlight module, comprising:

a light guide plate including a surface having a main area and a peripheral area surrounding the main area;

a reflective component disposed adjacent to the surface and corresponding to the primary region;

a retro-reflective component disposed adjacent to the surface and corresponding to the surrounding area; and

a light source emitting light to a side of the light guide plate;

wherein the reflectivity of the reflection reducing component is smaller than the reflectivity of the reflection component.

2. The backlight module according to claim 1, wherein the down-reflecting member is disposed at a side opposite to the side of the light source emitting light to the light guide plate.

3. The backlight module of claim 1, wherein the reflection reducing member is disposed along all side edges of the light guide plate.

4. The backlight module of claim 1, wherein the reflection reducing member is discontinuous.

5. The backlight module of claim 1, wherein a ratio of the reflectivity of the reflection reducing component to the reflectivity of the reflection component is greater than or equal to 3% and less than or equal to 85%.

6. The backlight module of claim 1, comprising an active region and a peripheral region surrounding the active region, wherein the anti-reflection element is disposed in the peripheral region.

7. The backlight module of claim 6, wherein a ratio of the light intensity of the peripheral region to the light intensity of the active region is greater than or equal to 20% and less than or equal to 80%.

8. The backlight module of claim 6, further comprising a housing assembly disposed adjacent to the light guide plate.

9. The backlight module of claim 8, wherein a first width of the reflection reducing assembly between the housing assembly and the reflection assembly in the peripheral region is greater than or equal to a second width of the reflection assembly in the peripheral region.

10. The backlight module of claim 9, wherein a ratio of the second width to the first width is between 1: 1 to 1: 2.

11. The backlight module of claim 1, wherein the reflection reducing assembly comprises a first glue layer and a substrate layer disposed on the first glue layer.

12. The backlight module of claim 11, wherein the reflection reducing assembly further comprises a second adhesive layer, and the substrate layer is disposed between the first adhesive layer and the second adhesive layer.

13. The backlight module of claim 12, wherein the base layer or the second glue layer is patterned.

14. The backlight module of claim 12, wherein the second adhesive layer is in contact with the light guide plate.

15. A display device, comprising:

a backlight module, comprising:

a light source emitting light to a side of the light guide plate;

16. The display device of claim 15, comprising a display area and a non-display area surrounding the display area, wherein the reflection reducing member is disposed corresponding to the non-display area.

17. The display apparatus according to claim 16, wherein a portion of the light guide plate is disposed corresponding to the non-display region, and a ratio of a width of the reflection reducing member overlapping the light guide plate to a width of the light guide plate disposed corresponding to the non-display region is between 1: 1.5 to 1: 3, or less.

18. The display device of claim 15, wherein a ratio of the reflectivity of the reflection reducing component to the reflectivity of the reflection component is greater than or equal to 3% and less than or equal to 85%.

19. The display device according to claim 16, wherein a ratio of the light intensity of the backlight module corresponding to the non-display area to the light intensity of the backlight module corresponding to the display area is greater than or equal to 20% and less than or equal to 80%.

20. The display device of claim 15, wherein a top surface of the reflection reducing component adjacent to the light guide plate is patterned.