CN114863797A - Backlight module - Google Patents

Backlight module Download PDF

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Publication number
CN114863797A
CN114863797A CN202110149641.3A CN202110149641A CN114863797A CN 114863797 A CN114863797 A CN 114863797A CN 202110149641 A CN202110149641 A CN 202110149641A CN 114863797 A CN114863797 A CN 114863797A
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CN
China
Prior art keywords
light
distance
opening
backlight module
width
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Pending
Application number
CN202110149641.3A
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Chinese (zh)
Inventor
刘金涌
邓嘉峰
林进伟
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Hannstar Display Nanjing Corp
Hannstar Display Corp
Original Assignee
Hannstar Display Nanjing Corp
Hannstar Display Corp
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Publication date
Application filed by Hannstar Display Nanjing Corp, Hannstar Display Corp filed Critical Hannstar Display Nanjing Corp
Priority to CN202110149641.3A priority Critical patent/CN114863797A/en
Publication of CN114863797A publication Critical patent/CN114863797A/en
Pending legal-status Critical Current

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    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
    • G09F9/00—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
    • G02F1/1336—Illuminating devices
    • G02F1/133602—Direct backlight
    • G02F1/133606—Direct backlight including a specially adapted diffusing, scattering or light controlling members
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
    • G02F1/1336—Illuminating devices
    • G02F1/133602—Direct backlight
    • G02F1/133608—Direct backlight including particular frames or supporting means

Abstract

The invention discloses a backlight module which comprises a plurality of light-emitting units, a back plate and a dimming structure. The back plate is provided with a plurality of accommodating spaces, and the plurality of light-emitting units are accommodated in the accommodating spaces respectively. The light adjusting structure is provided with a first surface and a second surface opposite to the first surface, the first surface is provided with a first opening, the second surface is provided with a second opening, and the light adjusting structure is arranged on the back plate through the first surface. The dimming structure is provided with a plurality of dimming units, and each dimming unit comprises a dimming surface. The light adjusting surface is provided with a first side edge and a second side edge opposite to the first side edge, and the first side edge is connected to the first surface. The distance from the center of the first opening to the edge of the first opening is a first width, the distance from the center of the second opening to the edge of the second opening is a second width, and the second width is smaller than the first width.

Description

Backlight module
Technical Field
The present invention relates to a backlight module, and more particularly, to a backlight module having a plurality of light emitting units and a light adjusting structure.
Background
In recent years, due to the development of technology and the increase of information demand, the applications of displays have not been limited to conventional flat panel displays, and the variety of displays has been increased from early liquid crystal displays to self-luminous displays using organic light-emitting diodes (OLEDs) or inorganic light-emitting diodes (LEDs). Meanwhile, organic or inorganic light emitting diodes are also required to be applied to a backlight module of a display. As the size of the display increases, the requirements of the backlight module for the uniformity and light extraction efficiency of the light source also increase. However, the aforementioned displays mostly use a plurality of point light sources, and the associated problems include halo, which is divided and not easily controlled. Although a diffuser plate is used above the light source to increase the uniformity of the light source, the diffuser plate still reduces the light extraction efficiency. Therefore, how to maintain the uniformity of the light source of the backlight module, control the halo of the point light source, and maintain the light-emitting efficiency of the backlight module are important issues to be considered.
Disclosure of Invention
The present invention provides a backlight module, which controls the halo generated by the light source through the design of a light modulation surface to solve the above problems.
An embodiment of the invention provides a backlight module, which includes a plurality of light emitting units, a back plate and a dimming structure. The plurality of light emitting units are respectively used for emitting light, the back plate is provided with a plurality of accommodating spaces, and the plurality of light emitting units are accommodated in the accommodating spaces. The light adjusting structure is provided with a first surface and a second surface opposite to the first surface, the first surface is provided with a first opening, the second surface is provided with a second opening, and the light adjusting structure is arranged on the back plate through the first surface. The dimming structure is provided with a plurality of dimming units, each dimming unit comprises a dimming surface and a side surface, the dimming surface is provided with a first side edge and a second side edge opposite to the first side edge, and the first side edge is connected to the first surface. The side face is provided with a third side edge and a fourth side edge opposite to the third side edge, the third side edge is connected with the second side edge of the dimming face, and the fourth side edge is connected with the second surface. The first opening has a first width, the second opening has a second width, the first width is a distance from a center of the first opening to an edge of the first opening, the second width is a distance from a center of the second opening to an edge of the second opening, and the second width is smaller than the first width.
An embodiment of the invention provides a backlight module, which includes a plurality of light emitting units, a back plate and a dimming structure. The back plate is provided with a plurality of accommodating spaces, and the plurality of light-emitting units are accommodated in the accommodating spaces. The light adjusting structure is provided with a first surface and a second surface opposite to the first surface, the first surface is provided with a first opening, the second surface is provided with a second opening, and the light adjusting structure is arranged on the back plate through the first surface. The structure of adjusting luminance has a plurality of units of adjusting luminance, and each unit of adjusting luminance includes a face of adjusting luminance, it has a first side and is relative to adjust luminance the face a second side of first side, first side is connected just the first surface the second side is connected the second surface. The first opening has a first width, the second opening has a second width, the first width is a distance from a center of the first opening to an edge of the first opening, the second width is a distance from a center of the second opening to an edge of the second opening, and the second width is smaller than the first width.
In summary, the backlight module of the present invention can make the light emitted from the light emitting unit in the backlight module emit more uniformly by adjusting the dimming surface of the dimming structure, and adjust the halo formed by the emitted light by the dimming surface, so as to solve the above-mentioned problems.
Drawings
Fig. 1 is a perspective view illustrating an appearance of a backlight module according to a first embodiment of the invention.
Fig. 2 is an exploded view of a backlight module according to a first embodiment of the present invention.
Fig. 3 is a partial perspective view of a backlight module according to a first embodiment of the invention.
Fig. 4 is a cross-sectional view of a backlight module according to a first embodiment of the invention.
Fig. 5 is a cross-sectional view of a backlight module according to a second embodiment of the invention.
Fig. 6 is a cross-sectional view of a backlight module according to a third embodiment of the invention.
Fig. 7 is a cross-sectional view of a backlight module according to a fourth embodiment of the invention.
FIG. 8 is a diagram of a light trace of a backlight module according to a first embodiment of the present invention.
FIG. 9 is a diagram of a light trace of a backlight module according to a second embodiment of the present invention.
FIG. 10 is a diagram of a light trace of a backlight module according to a third embodiment of the present invention.
Description of reference numerals: 1,2,3, 4-backlight module; 100,100a,100b,100 c-dimming structure; 120-a light emitting unit; 122-a light-emitting surface; 140-a containing space; 142-side walls; 144-outer frame; 160,160a,160b,160 c-dimming cells; 162-a first surface; 163-first opening; 164,164a,164 b; 1640,1640'; 1641,1641' -dimming surface; a first side edge; a second side edge; 165-a second opening; 166, a water-soluble polymer; 1660; 1661-side; a third side; a fourth side; 168-a second surface; 170,170' -dot; 200-a diffusion plate; 300,300 b-back plate; 400-a substrate; a-a second width; b-included angle; c-a first distance; d-a second distance; e-a third distance; g-a first width; h-thickness; k-the distance between two adjacent second openings; o, O' -virtual circle center; r1, R2-radius of curvature; ra-roughness.
Detailed Description
In order to make those skilled in the art understand the present invention, the following embodiments are specifically illustrated and described in detail with reference to the accompanying drawings. It should be noted that the drawings are simplified schematic diagrams, and therefore, only the elements and combinations related to the present invention are shown to provide a clearer description of the basic architecture or implementation method of the present invention, and the actual elements and layout may be more complicated. For convenience of description, the elements shown in the drawings are not necessarily drawn to scale, and the specific scale may be adjusted according to design requirements.
It should be understood that although the terms first, second and third … may be used to describe various elements, these elements should not be limited by these terms. This term is used only to distinguish one element from another within the specification. The same terms may not be used in the claims, but instead first, second, and third … may be substituted for the elements in the claims in the order in which they are presented. Thus, in the following description, a first element may be a second element in a claim.
It will be understood that when an element is referred to as being "on" or "connected to" another element, it can be directly on or connected to the other element or intervening elements may be present. In contrast, when an element is referred to as being "directly on" or "directly connected to" another element, there are no intervening elements present between the two.
It is to be understood that the embodiments described below may be implemented in various other embodiments, and that various changes, substitutions, and alterations may be made herein without departing from the spirit and scope of the invention.
Referring to fig. 1 and fig. 2, fig. 1 is a perspective view illustrating a backlight module 1 according to a first embodiment of the present invention, and fig. 2 is an exploded view illustrating the backlight module 1 according to the first embodiment of the present invention. As shown in fig. 1 and fig. 2, the backlight module 1 includes a plurality of light emitting units 120, a back plate 300 and a dimming structure 100. The back plate 300 has a plurality of accommodating spaces 140, and the plurality of light emitting units 120 are respectively configured to emit light and are accommodated in the plurality of accommodating spaces 140. The back plate 300 is formed with a plurality of side walls 142 in a direction parallel to the edge of the back plate 300, and the side walls 142 are staggered to form the accommodating space 140. In this embodiment, the backlight module 1 further includes a substrate 400, wherein the back plate 300 is disposed on the substrate 400, but the implementation is not limited thereto, for example, the backlight module 1 may not include the substrate 400. In this embodiment, the backlight module 1 further includes a diffuser 200, and the diffuser 200 is disposed on the back plate 300. The light adjusting structure 100 may be made of an organic insulating material, such as Polyfluoroalkoxy (PFA), Polydimethylsiloxane (PDMS), polymethyl methacrylate (PMMA), or a combination thereof.
Referring to fig. 3 and fig. 4, fig. 3 is a partial perspective schematic view of a backlight module 1 according to a first embodiment of the invention, and fig. 4 is a cross-sectional view of the backlight module 1 according to the first embodiment of the invention. In this embodiment, the light-adjusting structure 100 has a plurality of light-adjusting units 160, a first surface 162 and a second surface 168 opposite to the first surface 162, and the light-adjusting structure 100 is disposed on the back plate 300 with the first surface 162. The first surface 162 has a first opening 163, the second surface 168 has a second opening 165, and each of the dimming units 160 includes a dimming surface 164, the dimming surface 164 has a first side 1640 and a second side 1641 opposite to the first side 1640, and the first side 1640 of the dimming surface 164 is connected to the first surface 162 of the dimming structure 100. In the first embodiment, the dimming cell 160 further comprises a side 166, the side 166 has a third side 1660 and a fourth side 1661 opposite to the third side 1660, the third side 1660 of the side 166 is connected to the second side 1641 of the dimming surface 164, and the fourth side 1661 of the side 166 is connected to the second surface of the dimming structure 100.
Further, the first opening 163 has a first width G, and the second opening 165 has a second width a, wherein the first width G is the distance from the center of the first opening 163 to the edge of the first opening 163, so the actual width of the first opening 163 is twice the first width G; the second width a is a distance from the center of the second opening 165 to the edge of the second opening 165, and thus the actual width of the second opening 165 is twice the second width a. In addition, since the actual width of the second opening 165 is smaller than the actual width of the first opening 163, the second width a is smaller than the first width G (as shown in fig. 4). In the present invention, the first opening 163 and the second opening 165 are circular openings, so the actual width of the openings is equivalent to the diameter of the openings. However, the first opening 163 and the second opening 165 are not limited to circular openings, and the shapes of the first opening 163 and the second opening 165 depend on actual requirements.
As shown in fig. 3, the light-adjusting structure 100 may have a plurality of dots 170 and 170 'between two adjacent second openings 165 on the second surface 168, wherein the dots 170 may be distributed on the second surface 168 in a radial line shape by taking the second openings 165 as a center, and the dots 170' may be distributed on the second surface 168 in a straight line shape by taking the second openings 165 as a center. In this embodiment, the dots disposed on the second surface 168 are a combination of the dots 170 distributed in a radial line shape and the dots 170' disposed in a straight line shape, that is, the second surface 168 is provided with both the dots 170 distributed in a radial line shape and the dots 170' disposed in a straight line shape, but the present invention is not limited thereto, and for example, the second surface 168 may be provided with only the dots 170 distributed in a radial line shape or only the dots 170' disposed in a straight line shape, depending on the actual requirements. In addition, in this embodiment, the dots 170,170' may be pits (depressions depressed from the second surface 168 toward the first surface 162), but the invention is not limited thereto, for example, the dots 170,170' may also be bumps (protrusions protruding from the second surface 168), or the dots 170,170' may also be a combination of pits and bumps, depending on the actual requirement.
As shown in fig. 4, the light emitting unit 120 has a light emitting surface 122. Since the light-adjusting structure 100 is disposed on the back plate 300, and the light-emitting units 120 are accommodated in the accommodating spaces 140, a part of the light emitted by the light-emitting units 120 enters the light-adjusting structure 100 from the light-adjusting surfaces 164 of the light-adjusting units 160 and exits the light-adjusting structure 100 through the second surface 168, and the light-adjusting surfaces 164 may be disposed with a directional microstructure (e.g., a dot) that can increase the light-emitting efficiency. In addition, the light-adjusting surface 164 has a roughness Ra satisfying the following relationship:
the roughness Ra is more than or equal to 0.8 micron and less than or equal to 6.3 microns.
On the other hand, the light not entering the light-adjusting surface 164 (i.e. another part of the light emitted by the light-emitting unit 120) exits the light-adjusting structure 100 through a channel formed between the first opening 163 and the second opening 165.
An included angle B is formed between the light-adjusting surface 164 and the first surface 162, a first distance C is formed between the light-emitting surface 122 of the light-emitting unit 120 and the first surface 162 of the light-adjusting structure 100, a second distance D is formed between the center of the light-emitting unit 120 and the edge of the light-emitting unit 120, and a third distance E is formed between the center of the accommodating space 140 and the edge of the accommodating space 140. The second width a, the included angle B, the first distance C, the second distance D, and the third distance E of the backlight module 1 of the first embodiment satisfy the following relationships:
A＝2D；
135°≤B≤155°；
e ═ 8D; and
0.1mm≤C≤0.3mm。
wherein the included angle B is in degrees (deg.) and the first distance C is in millimeters (mm).
Referring to fig. 8, fig. 8 is a light trace diagram of the backlight module 1 according to the first embodiment of the invention. The light trace shown in fig. 8 is generated by the backlight module 1 satisfying the parameters of the above relation. It should be noted that the dimming surface 164 of the backlight module 1 according to the first embodiment of the present invention is a conical surface, and the backlight module 1 according to the first embodiment of the present invention can adjust the halo formed by the light emitted by the light emitting unit 120 of the backlight module 1 through the adjustment of the included angle B, and the larger the value B is, the larger the range formed by the halo is. In addition, the backlight module 1 according to the first embodiment of the present invention is suitable for adjusting various types of halos, such as halos formed by circular or square light spots.
Referring to fig. 5, fig. 5 is a cross-sectional view of a backlight module 2 according to a second embodiment of the invention. The major difference between the backlight module 2 of the second embodiment and the backlight module 1 of the first embodiment is that the dimming surface 164a of the dimming unit 160a of the dimming structure 100a of the backlight module 2 is a curved surface, the dimming surface 164a has a curvature radius R1, and a thickness H is formed between the first surface 162 and the second surface 168 of the dimming structure 100a of the backlight module 2. The second width a, the first distance C, the second distance D, the third distance E, the curvature radius R1, the thickness H, and the second opening distance between the edges of two adjacent second openings 165 of the backlight module 2 according to the second embodiment are as follows:
A＝2D；
K≤2×(1.5E)；
R1＝0.5H；
e ═ 8D; and
0.1mm≤C≤0.3mm。
wherein the first distance C is in millimeters (mm).
In addition, the dimming surface 164a of the backlight module 2 has a virtual center O, which is located outside the structure of the dimming structure 100a of the backlight module 2. In detail, in this embodiment, the light-adjusting surface 164a is a curved surface and has a curvature radius R1, so that the curvature radius of the light-adjusting surface 164a is R1 and the virtual center O is located outside the light-adjusting structure 100a and near the light-emitting unit 12. The arc surface is a portion above the light emitting unit 120. In this way, the light emitted from the light emitting unit 120 to the surroundings can be emitted through the dimming surface 164 a.
Referring to fig. 9, fig. 9 is a light trace diagram of a backlight module 2 according to a second embodiment of the invention. The optical trace shown in fig. 9 is generated by the backlight module 2 satisfying the parameters of the above relation. It should be noted that the dimming surface 164a of the backlight module 2 according to the second embodiment of the present invention is a curved surface (or called as a curved surface), the dimming surface 164a has a virtual center O, the virtual center O is located outside the structure of the dimming structure 100a of the backlight module 2, in this design, by adjusting the relationship between the second opening distance K and the edge distance E from the center of the accommodating space to be K less than or equal to 2 × (1.5E), and meanwhile, the curvature radius of the curved surface is equal to 0.5H, the backlight module 2 can adjust the size of the halo caused by the light emitted by the light emitting unit 120.
Referring to fig. 6, fig. 6 is a cross-sectional view of a backlight module 3 according to a third embodiment of the invention. The major difference between the backlight module 3 of the third embodiment and the backlight module 2 of the second embodiment is that the dimming unit 160b of the dimming structure 100b of the backlight module 3 of the third embodiment has no side surface, i.e. the dimming surface 164b of the dimming unit 160b of the dimming structure 100b has a first side 1640' and a second side 1641' opposite to the first side 1640', the first side 1640' of the dimming surface 164b is connected to the first surface 162 of the dimming structure 100b, and the second side 1641' of the dimming surface 164b is connected to the second surface 168 of the dimming structure 100 b.
In addition, the dimming surface 164b is a curved surface and has a curvature radius R2, and a thickness H is formed between the first surface 162 and the second surface 168 of the dimming structure 100 b. The second width a, the first distance C, the second distance D, the third distance E, the curvature radius R2, the thickness H, and the second opening distance between the edges of two adjacent second openings 165 of the backlight module 3 according to the third embodiment are as follows:
A＝2D；
K≤2×(2E)；
0.5H≤R2≤H；
e ═ 8D; and
0.1mm≤C≤0.3mm。
wherein the first distance C is in millimeters (mm).
Unlike the second embodiment, the light-adjusting surface 164b of the third embodiment has a virtual center O' located inside the light-adjusting structure 100 b. In detail, in this embodiment, the light-adjusting surface 164b is a curved surface and has a curvature radius R2, so that the curvature radius of the light-adjusting surface 164b is R2, and the virtual center O' is located inside the structure of the light-adjusting structure 100b and away from the light-emitting unit 12. The arc surface is a portion above the light emitting unit 120. In this way, the light emitted from the light emitting unit 120 to the surroundings can be emitted through the dimming surface 164 b.
Referring to fig. 10, fig. 10 is a light trace diagram of a backlight module 3 according to a third embodiment of the invention. The optical trace shown in fig. 10 is generated by the backlight module 3 satisfying the parameters of the above relation. It should be noted that the dimming surface 164b of the backlight module 3 according to the third embodiment of the present invention is a curved surface (or called arc surface), and the dimming surface 164b has a virtual center O ', and the virtual center O' is located in the structure of the dimming structure 100b of the backlight module 3. Under the design, by adjusting the relationship between the second opening distance K and the distance E from the center of the accommodating space to the edge of the accommodating space to be K less than or equal to 2 × (2E), and simultaneously making the curvature radius of the arc surface less than or equal to H and greater than or equal to 0.5H, the backlight module 3 can adjust the size of the halo caused by the light emitted by the light emitting unit 120.
Referring to fig. 7, fig. 7 is a cross-sectional view of a backlight module 4 according to a fourth embodiment of the invention. As shown in fig. 7, different from the third embodiment, a light-adjusting unit 160c of the backlight module 4 includes a side surface 166 in addition to a light-adjusting surface 164b, and the components with the same reference numerals in this embodiment have the same structural design and operation principle, and are not described herein again for brevity.
In summary, in the first embodiment of the invention, the light modulation surface is a conical surface, and the backlight module can adjust the size of a halo caused by the light emitted by the light emitting unit by adjusting the range of the included angle B between the light modulation surface and the first surface.
In the second/fourth embodiment of the present invention, the light-adjusting surface is a curved surface (or called arc surface), and the light-adjusting surface has a virtual center, and the virtual center is located outside the structural body of the light-adjusting structure of the backlight module. Under the design, the relationship between the second opening distance K and the distance E from the center of the accommodating space to the edge of the accommodating space is adjusted to be K less than or equal to 2 x (1.5E), meanwhile, the curvature radius of the cambered surface is equal to 0.5H, and the backlight module can adjust the size of a halo caused by light rays emitted by the light emitting unit.
In a third embodiment of the present invention, the light-adjusting surface is a curved surface (or called arc surface), and the light-adjusting surface has a virtual center, and the virtual center is located inside a structural body of the light-adjusting structure of the backlight module. Under the design, the relationship between the second opening distance K and the distance E from the center of the accommodating space to the edge of the accommodating space is adjusted to be K less than or equal to 2 x (2E), meanwhile, the curvature radius of the cambered surface is smaller than or equal to H and larger than or equal to 0.5H, and the backlight module can adjust the size of a halo caused by light rays emitted by the light-emitting unit.
In addition, the backlight module can simultaneously match with the directional microstructure on the light adjusting surface and the roughness of the light adjusting surface to improve the light emitting efficiency of the backlight module.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (10)

1. A backlight module, comprising:
a plurality of light emitting units for emitting light rays respectively;
the back plate is provided with a plurality of accommodating spaces, and the plurality of light-emitting units are accommodated in the accommodating spaces; and
a light-adjusting structure having a first surface and a second surface opposite to the first surface, the first surface having a first opening, the second surface having a second opening, and the light-adjusting structure being disposed on the back plate with the first surface, the light-adjusting structure having a plurality of light-adjusting units, each light-adjusting unit comprising:
the light adjusting surface is provided with a first side edge and a second side edge opposite to the first side edge, and the first side edge is connected to the first surface; and
a side surface having a third side edge and a fourth side edge opposite to the third side edge, the third side edge being connected to the second side edge of the dimming surface, and the fourth side edge being connected to the second surface;
the first opening has a first width, the second opening has a second width, the first width is a distance from a center of the first opening to an edge of the first opening, the second width is a distance from a center of the second opening to an edge of the second opening, and the second width is smaller than the first width.
2. The backlight module of claim 1, wherein:
the light-emitting unit is provided with a light-emitting surface;
the second width is A;
an included angle is formed between the light adjusting surface and the first surface, and the included angle is B;
the light emitting surface of the light emitting unit and the first surface of the dimming structure have a first distance, and the first distance is C;
the center of the light-emitting unit and the edge of the light-emitting unit have a second distance, and the second distance is D;
the center of the accommodating space and the edge of the accommodating space have a third distance, and the third distance is E;
wherein the parameters satisfy the following relationships:
A＝2D；
135°≤B≤155°；
e ═ 8D; and
0.1mm≤C≤0.3mm。
3. the backlight module of claim 1, wherein:
the light-emitting unit is provided with a light-emitting surface;
the second width is A;
a second opening distance is formed between the edges of two adjacent second openings, and the minimum second opening distance is K;
the light adjusting surface is provided with a curved surface, the curved surface is provided with a curvature radius, and the curvature radius is R1;
the light emitting surface and the first surface of the dimming structure have a first distance, and the first distance is C;
the center of the light-emitting unit and the edge of the light-emitting unit have a second distance, and the second distance is D;
the center of the accommodating space and the edge of the accommodating space have a third distance, and the third distance is E;
a thickness is arranged between the first surface and the second surface of the dimming structure, and the thickness is H;
wherein the parameters satisfy the following relationships:
A＝2D；
K≤2×(1.5E)；
R1＝0.5H；
e ═ 8D; and
0.1mm≤C≤0.3mm。
4. a backlight module, comprising:
a plurality of light emitting units for emitting light rays respectively;
the back plate is provided with a plurality of accommodating spaces, and the plurality of light-emitting units are accommodated in the accommodating spaces; and
a light-adjusting structure having a first surface and a second surface opposite to the first surface, the first surface having a first opening, the second surface having a second opening, and the light-adjusting structure being disposed on the back plate with the first surface, the light-adjusting structure having a plurality of light-adjusting units, each light-adjusting unit comprising:
the light adjusting surface is provided with a first side edge and a second side edge opposite to the first side edge, the first side edge is connected with the first surface, and the second side edge is connected with the second surface;
wherein the first opening has a first width, the second opening has a second width, the first width is a distance from a center of the first opening to an edge of the first opening, the second width is a distance from a center of the second opening to an edge of the second opening, and the second width is smaller than the first width.
5. The backlight module of claim 4, wherein:
the light-emitting unit is provided with a light-emitting surface;
a second opening distance is formed between the edges of two adjacent second openings, and the minimum second opening distance is K;
the light adjusting surface is provided with a curved surface, and the curved surface is provided with a curvature radius R2;
the second width is A;
the light emitting surface and the first surface of the dimming structure have a first distance, and the first distance is C;
the center of the light-emitting unit and the edge of the light-emitting unit have a second distance, and the second distance is D;
a third distance is formed between the center of the accommodating space and one edge of the accommodating space, and the third distance is E;
the first surface and the second surface of the light adjusting structure have a thickness H therebetween;
wherein the parameters satisfy the following relationships:
A＝2D；
K≤2×(2E)；
0.5H≤R2≤H；
e ═ 8D; and
0.1mm≤C≤0.3mm。
6. the backlight module according to claim 1 or 4, wherein the second surface has a plurality of dots, and the dots are uniformly distributed between two adjacent second openings, or the dots are distributed on the second surface linearly or radially with the second openings as a center.
7. The backlight module according to claim 1 or 4, wherein the dimming surface has a roughness satisfying the following relationship:
the roughness is less than or equal to 0.8 micron and less than or equal to 6.3 microns.
8. The backlight module of claim 1 or 4, further comprising a substrate, wherein the back plate is disposed on the substrate.
9. The backlight module of claim 1 or 4, wherein the light-adjusting surface has a virtual center, and the virtual center is located outside the structural body of the light-adjusting structure.
10. The backlight module of claim 1 or 4, wherein the light-adjusting surface has a virtual center, and the virtual center is located inside the structural body of the light-adjusting structure.
CN202110149641.3A 2021-02-03 2021-02-03 Backlight module Pending CN114863797A (en)

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