CN117872641A - Backlight module and display device - Google Patents
Backlight module and display device Download PDFInfo
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- CN117872641A CN117872641A CN202311840864.XA CN202311840864A CN117872641A CN 117872641 A CN117872641 A CN 117872641A CN 202311840864 A CN202311840864 A CN 202311840864A CN 117872641 A CN117872641 A CN 117872641A
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- bottom plate
- circuit board
- printed circuit
- backlight module
- blocking portion
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- 230000000903 blocking effect Effects 0.000 claims description 73
- 239000000463 material Substances 0.000 claims description 8
- 239000000758 substrate Substances 0.000 claims description 7
- 239000007769 metal material Substances 0.000 claims description 4
- 230000000694 effects Effects 0.000 abstract description 7
- 230000003068 static effect Effects 0.000 abstract description 3
- 235000009537 plain noodles Nutrition 0.000 abstract description 2
- 210000002105 tongue Anatomy 0.000 description 53
- 238000000034 method Methods 0.000 description 7
- 230000009471 action Effects 0.000 description 6
- 230000008569 process Effects 0.000 description 4
- 239000004973 liquid crystal related substance Substances 0.000 description 3
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 2
- 239000002390 adhesive tape Substances 0.000 description 2
- 230000004888 barrier function Effects 0.000 description 2
- 229910052802 copper Inorganic materials 0.000 description 2
- 239000010949 copper Substances 0.000 description 2
- 238000009795 derivation Methods 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000003044 adaptive effect Effects 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 238000004080 punching Methods 0.000 description 1
Classifications
-
- 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
-
- 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
- G02F1/133308—Support structures for LCD panels, e.g. frames or bezels
-
- 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
- G02F1/133612—Electrical details
Landscapes
- Physics & Mathematics (AREA)
- Nonlinear Science (AREA)
- Mathematical Physics (AREA)
- Chemical & Material Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Planar Illumination Modules (AREA)
Abstract
The application discloses a backlight module and a display device. The backlight module comprises a backlight assembly, a frame body and a printed circuit board. The frame body includes a main body portion and a plurality of tabs, the main body portion being disposed around the backlight assembly. The tongue piece extends out of the surface of one side of the main body part, which is away from the backlight assembly along the first direction, namely, the tongue piece and the backlight assembly are positioned at two sides of the main body part, so that interference between the tongue piece and the backlight assembly is avoided, and normal light emission of the backlight assembly is ensured. The tongue piece comprises a bottom plate and a limiting part, a plurality of tongue pieces are arranged at intervals in the second direction, namely a plurality of bottom plates are arranged at intervals, and the plurality of bottom plates support the same printed circuit board at the same time. And the bottom plate is provided with spacing portion towards one side of backlight unit play plain noodles, and spacing portion is spacing printed circuit board on the bottom plate for on printed circuit board's the firm detachable connection and the tongue piece, have lower contact impedance between guaranteeing printed circuit board and the tongue piece, reduce printed circuit board's ground impedance promptly, and can improve printed circuit board static and derive the effect.
Description
Technical Field
The application relates to the field of display, in particular to a backlight module and a display device.
Background
Since the liquid crystal display has many advantages such as light weight, energy saving, etc., the liquid crystal display is widely used in electronic devices such as high definition digital televisions, computers, mobile phones, digital cameras, etc. in daily life.
The backlight module is an important component of the liquid crystal display. The backlight module generally includes a tongue and a printed circuit board. In the related art, the tongue piece is fixedly connected with the printed circuit board, but the printed circuit board is easily separated from the tongue piece, so that the grounding impedance of the printed circuit board is larger.
Disclosure of Invention
The embodiment of the application provides a backlight module and a display device, which aim to reduce the problem of grounding impedance of a printed circuit board.
An embodiment of a first aspect of the present application provides a backlight module, including a backlight assembly including a substrate; the frame body comprises a main body part and a plurality of tongue pieces, wherein the main body part is arranged around at least part of the backlight assembly, the tongue pieces extend out from the surface of one side of the main body part, which is away from the backlight assembly, along a first direction, the plurality of tongue pieces are arranged at intervals along a second direction, the tongue pieces comprise a bottom plate and a limit part positioned on one side of the bottom plate, which faces the light-emitting surface of the backlight module, the first direction is parallel to the plane of the substrate, and the first direction and the second direction are intersected; the printed circuit board is arranged on one side of the bottom plate facing the limiting part and is detachably connected with the tongue piece through the limiting part.
An embodiment of a second aspect of the present application provides a display device, which includes a backlight module and a display panel according to any one of the above embodiments, where the display panel is located at a side of the backlight module near a light emitting surface of the display device.
According to the backlight module, the backlight module comprises a backlight assembly, a frame body and a printed circuit board. The backlight assembly is used for realizing the light-emitting function of the backlight module. The frame body includes a main body portion and a plurality of tabs, and the main body portion is disposed around the backlight assembly to support and protect the backlight assembly. The tongue piece extends out of the surface of one side of the main body part, which is away from the backlight assembly along the first direction, namely, the tongue piece and the backlight assembly are positioned at two sides of the main body part, so that interference between the tongue piece and the backlight assembly is avoided, and normal light emission of the backlight assembly is ensured. The tongue piece includes bottom plate and spacing portion, and the bottom plate is used for supporting the printed circuit board, and a plurality of tongue pieces set up at the interval in the second direction, and a plurality of bottom plates interval sets up promptly, and a plurality of bottom plates support same printed circuit board simultaneously for the printed circuit board is comparatively stable to be located on the bottom plate. And the bottom plate is provided with spacing portion towards one side of backlight unit play plain noodles, and spacing portion is spacing printed circuit board on the bottom plate for on printed circuit board's the firm detachable connection and the tongue piece, have lower contact impedance between guaranteeing printed circuit board and the tongue piece, reduce printed circuit board's ground impedance promptly, and can improve printed circuit board static and derive the effect.
Drawings
Other features, objects and advantages of the present application will become more apparent upon reading the following detailed description of non-limiting embodiments, taken in conjunction with the accompanying drawings, in which like or similar reference characters designate the same or similar features, and which are not to scale.
Fig. 1 is a schematic top view of a backlight module according to an embodiment of the present disclosure;
fig. 2 is a partial cross-sectional view of a backlight module according to an embodiment of the present application;
FIG. 3 is a schematic top view of a backlight module according to another embodiment;
fig. 4 is a partial cross-sectional view of a backlight module according to another embodiment;
fig. 5 is a partial cross-sectional view of a backlight module according to still another embodiment;
fig. 6 is a partial cross-sectional view of a backlight module according to still another embodiment;
fig. 7 is a partial cross-sectional view of a backlight module according to still another embodiment;
fig. 8 is a schematic top view of a backlight module according to another embodiment;
FIG. 9 is a schematic top view of a backlight module according to another embodiment;
fig. 10 is a schematic top view of a backlight module according to another embodiment;
fig. 11 is a partial cross-sectional view of a backlight module according to still another embodiment;
fig. 12 is a partial cross-sectional view of a backlight module according to still another embodiment.
Reference numerals illustrate:
10. a backlight module;
100. a backlight assembly; 110. a substrate;
200. a frame; 210. a main body portion; 220. a tongue piece; 221. a first tongue; 222. a second tongue; 230. a limit part; 231. a convex portion; 232. flanging; 240. a retaining wall; 241. a first retaining wall; 242. a second retaining wall; 250. a first blocking portion; 260. a second blocking portion; 261. a guide surface; 262. a bottom surface; 270. a bottom plate; 271. a first edge; 272. a second edge;
300. a printed circuit board; 310. opening holes;
alpha, a preset angle; l1, a first distance;
x, a first direction; y, second direction; z, thickness direction.
Detailed Description
Features and exemplary embodiments of various aspects of the present application are described in detail below to make the objects, technical solutions and advantages of the present application more apparent, and to further describe the present application in conjunction with the accompanying drawings and the detailed embodiments. It should be understood that the specific embodiments described herein are merely configured to explain the present application and are not configured to limit the present application. It will be apparent to one skilled in the art that the present application may be practiced without some of these specific details. The following description of the embodiments is merely intended to provide a better understanding of the present application by showing examples of the present application.
It is noted that relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising … …" does not exclude the presence of other like elements in a process, method, article or apparatus that comprises the element.
It will be understood that when a layer, an area, or a structure is described as being "on" or "over" another layer, another area, it can be referred to as being directly on the other layer, another area, or another layer or area can be included between the layer and the other layer, another area. And if the component is turned over, that layer, one region, will be "under" or "beneath" the other layer, another region.
At present, the fixing of the printed circuit board (Printed Circuit Board, PCB) of the backlight module mainly has two modes: (1) and (3) screw fixation: punching the tongue piece on the frame body to form a convex hull below the tongue piece, placing the upper side of the tongue piece on the PCB to form contact with copper leakage, and locking and fixing the tongue piece by a screw; (2) fixing conductive adhesive: and a conductive double-sided adhesive tape is attached above the tongue piece on the frame body, and then the PCB is placed to be contacted with the copper leakage, so that the adhesion fixation is realized and the grounding is realized through the frame body.
However, the scheme (1) has the following problems: according to the scheme, effective fixation can be realized, the grounding impedance can be ensured to be less than or equal to 5Ω, but the whole machine is required to avoid in the protruding position, so that the whole machine is insufficient in avoiding, and interference is easy to generate. The scheme (2) has the following problems: the PCB board and the conductive double faced adhesive tape effectively adhere to ensure the grounding effect, and the scheme needs to ensure the consistency of the tongue pieces at all positions, if one tongue piece is bent in place, the PCB board can be separated from the tongue piece after standing, so that the grounding impedance is larger, and the electrostatic discharge (ESD) performance is influenced.
In order to solve the above-mentioned problems, embodiments of the present application provide a backlight module and a display device, and embodiments of the backlight module and the display device will be described below with reference to the accompanying drawings.
Referring to fig. 1 and fig. 4, fig. 1 is a schematic top view of a backlight module according to an embodiment of the disclosure; fig. 2 is a partial cross-sectional view of a backlight module according to an embodiment of the present application; FIG. 3 is a schematic top view of a backlight module according to another embodiment; fig. 4 is a partial cross-sectional view of a backlight module according to another embodiment.
As shown in fig. 1 to 4, a first aspect of the present invention provides a backlight module 10, wherein the backlight module 10 includes a backlight assembly 100, a frame 200 and a printed circuit board 300, and the backlight assembly 100 includes a substrate 110; the frame 200 includes a main body 210 and a plurality of tongues 220, the main body 210 is disposed around at least a portion of the backlight assembly 100, the tongues 220 extend from a surface of the main body 210 on a side facing away from the backlight assembly 100 along a first direction X, the tongues 220 are disposed at intervals along a second direction Y, the tongues 220 include a bottom plate 270 and a limiting portion 230 located on a side of the bottom plate 270 facing the light-emitting surface of the backlight module 10, the first direction X is parallel to a plane of the substrate 110, and the first direction X and the second direction Y intersect; the printed circuit board 300 is disposed on a side of the bottom plate 270 facing the limiting portion 230, and the printed circuit board 300 is detachably connected to the tongue piece 220 through the limiting portion 230.
According to the backlight module 10 of the embodiment of the application, the backlight module 10 includes a backlight assembly 100, a frame 200 and a printed circuit board 300. The backlight assembly 100 is used for implementing the light emitting function of the backlight module 10. The frame 200 includes a main body portion 210 and a plurality of tabs 220, the main body portion 210 being disposed around the backlight assembly 100 to form support and protection for the backlight assembly 100. The tongue piece 220 extends from the surface of the main body 210 away from the side of the backlight assembly 100 along the first direction X, that is, the tongue piece 220 and the backlight assembly 100 are located at two sides of the main body 210, so as to avoid interference between the tongue piece 220 and the backlight assembly 100 and ensure normal light emission of the backlight assembly 100. The tongue piece 220 includes a bottom plate 270 and a limiting portion 230, the bottom plate 270 is used for supporting the printed circuit board 300, the plurality of tongue pieces 220 are arranged at intervals in the second direction Y, that is, the plurality of bottom plates 270 are arranged at intervals, and the plurality of bottom plates 270 simultaneously support the same printed circuit board 300, so that the printed circuit board 300 is more stably located on the bottom plate 270. And the side of the bottom plate 270 facing the light emitting surface of the backlight module 10 is provided with a limiting part 230, and the limiting part 230 limits the printed circuit board 300 on the bottom plate 270, so that the printed circuit board 300 is firmly and detachably connected with the tongue piece 220, thereby ensuring that the printed circuit board 300 and the tongue piece 220 have lower contact impedance, i.e. reducing the grounding impedance of the printed circuit board 300, and improving the electrostatic derivation effect of the printed circuit board 300.
In some alternative embodiments, the stopper 230 includes a retaining wall 240, the retaining wall 240 includes a first blocking portion 250 and a second blocking portion 260, the bottom plate 270 includes a first edge 271 remote from an adjacent bottom plate 270 and a second edge 272 remote from the backlight assembly 100, the first blocking portion 250 is located at the first edge 271 and/or the second edge 272, and the second blocking portion 260 is connected to an end of the first blocking portion 250 facing away from the bottom plate 270 and disposed opposite the bottom plate 270.
In these alternative embodiments, the first blocking portion 250 of the retaining wall 240 is connected to the bottom plate 270, as shown in fig. 1 and 2, the first blocking portion 250 limits the printed circuit board 300 in the second direction Y when the first blocking portion 250 is located at the first edge 271, and as shown in fig. 3 and 4, the first blocking portion 250 limits the printed circuit board 300 in the first direction X when the first blocking portion 250 is located at the second edge 272. As shown in fig. 2 and 4, the second blocking portion 260 of the blocking wall 240 is disposed opposite to the bottom plate 270, and when the printed circuit board 300 is disposed on the bottom plate 270, the bottom plate 270 and the second blocking portion 260 clamp the printed circuit board 300, and limit the printed circuit board 300 in the thickness direction Z of the backlight module 10.
Referring to fig. 5 and fig. 6 together, fig. 5 is a partial cross-sectional view of a backlight module according to another embodiment; fig. 6 is a partial cross-sectional view of a backlight module according to still another embodiment.
As shown in fig. 5 and 6, in some alternative embodiments, a distance between a surface of the second blocking portion 260 adjacent to the bottom plate 270 and a surface of the bottom plate 270 adjacent to the second blocking portion 260 along the thickness direction Z of the backlight module 10 is a first distance L1, and the first distance L1 is greater than or equal to a dimension of the printed circuit board 300 along the thickness direction Z.
In these alternative embodiments, as shown in fig. 6, the first distance L1 is greater than the thickness of the printed circuit board 300, so that the printed circuit board 300 has a large installation space, and can be easily installed between the second blocking portion 260 and the bottom plate 270, thereby limiting the printed circuit board 300 in the thickness direction Z by the second blocking portion 260 and the bottom plate 270. As shown in fig. 5, the first distance L1 is equal to the thickness of the printed circuit board 300, so that the printed circuit board 300 can be just clamped between the second blocking portion 260 and the bottom plate 270, the printed circuit board 300 is more stable under the clamping action of the second blocking portion 260 and the bottom plate 270, and is not easy to shake, so that the printed circuit board 300 is firmly detachably connected to the tongue piece 220, a lower contact impedance between the printed circuit board 300 and the tongue piece 220 is ensured, namely, the grounding impedance of the printed circuit board 300 is reduced, and the electrostatic derivation effect of the printed circuit board 300 can be improved.
Referring to fig. 7, fig. 7 is a partial cross-sectional view of a backlight module according to another embodiment.
In some alternative embodiments, as shown in fig. 7, the side of the second blocking portion 260 remote from the first blocking portion 250 has a guide surface 261, and in a direction remote from the first blocking portion 250, the guide surface 261 is disposed obliquely in a direction close to the bottom plate 270.
In these alternative embodiments, the guide surface 261 is configured such that, upon installation of the printed circuit board 300, the printed circuit board 300 is pressed between the second blocking portion 260 and the bottom plate 270 via the guide surface 261, resulting in a snap-fit connection between the printed circuit board 300 and the blocking wall 240.
In some alternative embodiments, the second blocking portion 260 includes a bottom surface 262 facing the bottom plate 270, the bottom surface 262 is interconnected with the guide surface 261, and the bottom surface 262 forms a predetermined angle α with the guide surface 261, the predetermined angle α being 0 to 90 °.
In these alternative embodiments, the predetermined angle α is greater than 0 such that the bottom surface 262 and the guide surface 261 form an angle to form the second blocking portion 260. The preset angle α is less than or equal to 90 ° to avoid the problem that the second blocking portion 260 having an obtuse angle is difficult to clamp the printed circuit board 300 due to the fact that the preset angle α is too large.
Optionally, the preset angle α is 40 ° to 50 °.
In these alternative embodiments, the preset angle α is greater than or equal to 40 °, so as to avoid the problem that the second blocking portion 260 is relatively low in structural strength due to the small preset angle α, and the second blocking portion 260 is easily damaged when the printed circuit board 300 is pressed. The preset angle alpha is smaller than or equal to 50 degrees, so that the problem that the second blocking portion 260 is large in structural strength due to the fact that the preset angle alpha is too large, and the second blocking portion 260 is difficult to deform when the printed circuit board 300 is pressed tightly, so that the printed circuit board 300 slides between the second blocking portion 260 and the bottom plate 270 is avoided.
Optionally, the preset angle α is 45 °, so that the printed circuit board 300 is more easily pressed between the second blocking portion 260 and the bottom plate 270 through the guide surface 261, thereby realizing clamping limitation of the second blocking portion 260 and the bottom plate 270 on the printed circuit board 300 in the thickness direction Z.
In some alternative embodiments, bottom surface 262 is disposed parallel to a surface of bottom plate 270 that faces second barrier 260.
In these alternative embodiments, when the bottom surface 262 of the second blocking portion 260 is disposed parallel to the surface of the bottom plate 270, during the clamping process of the second blocking portion 260 and the bottom plate 270 to the printed circuit board 300, the contact area between the printed circuit board 300 and the bottom surface 262 of the second blocking portion 260 can be increased, so that the printed circuit board 300 is more firmly clamped by the second blocking portion 260 and the bottom plate 270, so that the printed circuit board 300 is firmly detachably connected to the tongue piece 220, thereby ensuring a lower contact impedance between the printed circuit board 300 and the tongue piece 220, i.e. reducing the grounding impedance of the printed circuit board 300, and improving the electrostatic guiding effect of the printed circuit board 300.
Referring to fig. 8, fig. 8 is a schematic top view of a backlight module according to another embodiment.
As shown in fig. 8, in some alternative embodiments, the tongue 220 includes a first tongue 221 and a second tongue 222 adjacent to each other, the retaining wall 240 includes a first retaining wall 241 and a second retaining wall 242, the first retaining wall 241 is disposed on a side of the bottom plate 270 of the first tongue 221 away from the second tongue 222 in the second direction Y, and the second retaining wall 242 is disposed on a side of the bottom plate 270 of the second tongue 222 away from the first tongue 221 in the second direction Y.
In these alternative embodiments, the first retaining wall 241 and the second retaining wall 242 are disposed opposite to each other, and when the printed circuit board 300 is mounted on the bottom plate 270, the first retaining wall 241 and the second retaining wall 242 are disposed on both sides of the printed circuit board 300 in the second direction Y, so that the printed circuit board 300 is difficult to move in the second direction Y.
Referring to fig. 3, in some alternative embodiments, at least one retaining wall 240 is disposed on a side of the bottom plate 270 away from the backlight assembly 100 in the first direction X.
In these alternative embodiments, the blocking wall 240 is disposed at a side of the bottom plate 270 away from the backlight assembly 100 in the first direction X, and when the printed circuit board 300 is mounted on the bottom plate 270, the blocking wall 240 performs a pressing limit on the printed circuit board 300, so that the printed circuit board 300 is difficult to move in the first direction X.
Referring to fig. 2, fig. 4 and fig. 9 together, fig. 9 is a schematic top view of a backlight module according to another embodiment.
As shown in fig. 2, 4 and 9, in some alternative embodiments, at least two retaining walls 240 are connected to the same bottom plate 270, at least one of the at least two retaining walls 240 connected to the same bottom plate 270 is located on one side of the bottom plate 270 in the first direction X, and at least one other is located on one side of the bottom plate 270 in the second direction Y.
In these alternative embodiments, the same bottom plate 270 is connected to two retaining walls 240, and the two retaining walls 240 are separately disposed on one side of the bottom plate 270 in the first direction X and one side of the bottom plate 270 in the second direction Y, so that after the printed circuit board 300 is mounted on the tongue piece 220, the printed circuit board 300 is pressed by the retaining walls 240 in the first direction X and pressed by the retaining walls 240 in the second direction Y, that is, the printed circuit board 300 is simultaneously limited in the first direction X and the second direction Y, and is difficult to move, so that the stability of the printed circuit board 300 is further improved, the printed circuit board 300 is more firmly connected to the tongue piece 220 in a detachable manner, the contact resistance between the printed circuit board 300 and the tongue piece 220 is ensured to be lower, that is, the grounding resistance of the printed circuit board 300 is reduced, and the electrostatic guiding effect of the printed circuit board 300 can be improved.
In some alternative embodiments, the material of retaining wall 240 comprises plastic and bottom plate 270 comprises a metallic material.
In these alternative embodiments, when the material of the retaining wall 240 is plastic, on one hand, the plastic has a larger friction coefficient, so that the friction between the retaining wall 240 and the printed circuit board 300 can be increased, so that the printed circuit board 300 can be kept stable under the action of the friction force, and on the other hand, the retaining wall 240 of the plastic has a larger elasticity, when the printed circuit board 300 is mounted, the printed circuit board 300 needs to be pressed between the second blocking portion 260 and the bottom plate 270 by the guiding surface 261 of the retaining wall 240, so that the retaining wall 240 with the larger elasticity can be deformed more easily, so that the printed circuit board 300 slides between the second blocking portion 260 and the bottom plate 270 through the guiding surface 261. When the material of the bottom plate 270 is a metal material, after the printed circuit board 300 is mounted on the bottom plate 270, the printed circuit board 300 contacts with the bottom plate 270 to realize the grounding of the printed circuit board 300, so that static electricity generated on the printed circuit board 300 can be discharged to the ground through the bottom plate 270, and the ESD performance and reliability of the backlight module 10 are improved.
Optionally, the materials of the retaining wall 240 and the bottom plate 270 include metal materials, so that the retaining wall 240 and the bottom plate 270 can be made of the same metal plate, simplifying the manufacturing process, and the retaining wall 240 is formed by stamping.
Alternatively, the thickness of the first blocking portion 250 is 0mm to 5mm.
In these alternative embodiments, the thickness of the first blocking portion 250 is greater than 0, such that the first blocking portion 250 has a certain thickness and is positioned on the bottom plate 270 to limit the printed circuit board 300. The thickness of the first blocking portion 250 is less than or equal to 5mm, so that the first blocking portion 250 is prevented from being excessively thick, the material cost of the first blocking portion 250 is high, the structural strength of the first blocking portion 250 with excessively thick is excessively high, the first blocking portion 250 is difficult to deform when the printed circuit board 300 is pressed, and the printed circuit board 300 is difficult to slide between the second blocking portion 260 and the bottom plate 270.
In some alternative embodiments, the thickness of the first barrier 250 is 0.5mm to 1mm.
In these alternative embodiments, the thickness of the first blocking portion 250 is greater than or equal to 0.5mm, so that the problem that the first blocking portion 250 is damaged due to excessive deformation when the printed circuit board 300 is compressed due to the small structural strength caused by the excessively small thickness of the first blocking portion 250 is avoided. The thickness of the first blocking portion 250 is less than or equal to 1mm, so that the first blocking portion 250 is prevented from being too thick to cause high structural strength, the first blocking portion 250 is difficult to deform when the printed circuit board 300 is pressed, and the printed circuit board 300 is difficult to slide between the second blocking portion 260 and the bottom plate 270.
Referring to fig. 10 and 11 together, fig. 10 is a schematic top view of a backlight module according to another embodiment; fig. 11 is a partial cross-sectional view of a backlight module according to still another embodiment.
As shown in fig. 10 and 11, in some alternative embodiments, the stopper 230 includes a protrusion 231 extending in the thickness direction Z of the backlight module 10 and positioned on the bottom plate 270, and the printed circuit board 300 has an opening 310, and the protrusion 231 and the opening 310 are sized to fit so that the protrusion 231 can be positioned in the opening 310.
In these alternative embodiments, the opening 310 of the printed circuit board 300 is sleeved on the protrusion 231 on the bottom plate 270, and the protrusion 231 limits the printed circuit board 300, so that the printed circuit board 300 is difficult to move in the plane formed by the first direction X and the second direction Y, and the contact stability between the printed circuit board 300 and the bottom plate 270 is further improved.
Optionally, the boss 231 includes a punched hole, punched from the bottom plate 270.
Optionally, the protruding portion 231 and the opening 310 are multiple, and the protruding portion 231 and the opening 310 are disposed in a one-to-one correspondence, so that each protruding portion 231 can be connected with each opening 310 in an adaptive manner, thereby better limiting the printed circuit board 300.
In some alternative embodiments, the dimension of the protrusion 231 in the thickness direction Z is less than or equal to the dimension of the printed circuit board 300 in the thickness direction Z.
In these alternative embodiments, the protrusion 231 limits the printed circuit board 300 in the plane formed by the first direction X and the second direction Y, and improves the contact stability of the printed circuit board 300 with the bottom plate 270. And the dimension of the protruding part 231 in the thickness direction Z is smaller than or equal to the dimension of the printed circuit board 300 in the thickness direction Z, so that on one hand, the limit requirement of the protruding part 231 on the printed circuit board 300 can be met, and on the other hand, interference between the oversized protruding part 231 and other structures is avoided.
Referring to fig. 12, fig. 12 is a partial cross-sectional view of a backlight module according to another embodiment.
As shown in fig. 12, alternatively, the dimension of the protruding portion 231 in the thickness direction Z is larger than the dimension of the printed circuit board 300 in the thickness direction Z, the outer edge of the protruding portion 231 is provided with a flange 232 on the side far away from the bottom plate 270, and when the printed circuit board 300 is cooperatively connected with the protruding portion 231 through the opening 310, the flange 232 limits the printed circuit board 300 in the thickness direction Z, so that the contact stability between the printed circuit board 300 and the bottom plate 270 is further improved. When there are a plurality of protrusions 231 having the flanges 232, the printed circuit board 300 can be limited in the first direction X, the second direction Y and the thickness direction Z without providing the retaining wall 240.
Optionally, the limiting portion 230 includes a protrusion 231 and a retaining wall 240, where the protrusion 231 and the retaining wall 240 are matched to further improve the contact stability between the printed circuit board 300 and the tongue piece 220.
Alternatively, the material of the boss 231 includes plastic.
In these alternative embodiments, when the material of the protrusion 231 is plastic, the plastic has a larger friction coefficient, so that the friction between the protrusion 231 and the printed circuit board 300 can be increased, so that the printed circuit board 300 can be kept stable under the action of the friction force, and the protrusion 231 has a larger elasticity, so that when the printed circuit board 300 is mounted, the printed circuit board 300 needs to be pressed between the flange 232 and the bottom plate 270 of the protrusion 231, and therefore, the flange 232 with the larger elasticity can be deformed more easily, so that the printed circuit board 300 slides between the flange 232 and the bottom plate 270.
The structural design in this embodiment can be applied to other backlight modules 10, and can be specifically selected according to practical situations, which is not specifically limited in this application.
The second aspect of the present application further provides a display device, including the backlight module 10 and the display panel according to any one of the first aspect of the present application, where the display panel is located at a side of the backlight module near the light emitting surface of the display device. Since the display device provided in the second embodiment of the present application includes the backlight module 10 of any one of the embodiments of the first aspect, the display device provided in the second embodiment of the present application has the beneficial effects of the backlight module 10 of any one of the embodiments of the first aspect, which are not described herein again.
The display device in the embodiment of the application includes, but is not limited to, a mobile phone, a personal digital assistant (Personal Digital Assistant, abbreviated as PDA), a tablet computer, an electronic book, a television, an access control, a smart phone, a console, and other devices with display functions.
These embodiments are not all details described in detail according to the embodiments described hereinabove, nor are they intended to limit the invention to the specific embodiments described. Obviously, many modifications and variations are possible in light of the above teaching. The embodiments were chosen and described in order to best explain the principles of the invention and the practical application, to thereby enable others skilled in the art to best utilize the invention and various modifications as are suited to the particular use contemplated. This application is to be limited only by the claims and the full scope and equivalents thereof.
Claims (15)
1. A backlight module, comprising:
a backlight assembly including a substrate;
the frame body comprises a main body part and a plurality of tongue pieces, wherein the main body part is arranged around at least part of the backlight assembly, the tongue pieces extend out of the surface of one side, away from the backlight assembly, of the main body part along a first direction, the plurality of tongue pieces are arranged at intervals along a second direction, the tongue pieces comprise a bottom plate and a limiting part positioned on one side, facing the light emitting surface of the backlight module, of the bottom plate, the first direction is parallel to the plane where the substrate is positioned, and the first direction and the second direction are intersected;
the printed circuit board is arranged on one side of the bottom plate, which faces the limiting part, and the printed circuit board is detachably connected with the tongue piece through the limiting part.
2. The backlight module according to claim 1, wherein the limiting portion comprises a retaining wall, the retaining wall comprises a first blocking portion and a second blocking portion, the bottom plate comprises a first edge far away from the adjacent bottom plate and a second edge far away from the backlight assembly, the first blocking portion is located at the first edge and/or the second edge, and the second blocking portion is connected to one end of the first blocking portion, which is away from the bottom plate, and is opposite to the bottom plate.
3. A backlight module according to claim 2, wherein a distance between a surface of the second blocking portion on a side close to the bottom plate and a surface of the bottom plate on a side close to the second blocking portion in a thickness direction of the backlight module is a first distance, and the first distance is greater than or equal to a dimension of the printed circuit board in the thickness direction.
4. A backlight module according to claim 2, wherein a side of the second blocking portion away from the first blocking portion has a guide surface, and the guide surface is inclined in a direction approaching the bottom plate in a direction away from the first blocking portion.
5. A backlight module according to claim 4, wherein the second blocking portion comprises a bottom surface facing the bottom plate, the bottom surface and the guide surface are connected to each other, and the bottom surface and the guide surface form a preset angle, and the preset angle is 40 ° to 50 °.
6. A backlight module according to claim 5, wherein the predetermined angle is 45 °.
7. A backlight module according to claim 6, wherein the bottom surface is disposed parallel to a surface of the bottom plate facing the second blocking portion.
8. The backlight module according to claim 2, wherein the tongue comprises a first tongue and a second tongue adjacent to each other, the retaining wall comprises a first retaining wall and a second retaining wall, the first retaining wall is disposed on a side of the bottom plate of the first tongue away from the second tongue in the second direction, and the second retaining wall is disposed on a side of the bottom plate of the second tongue away from the first tongue in the second direction.
9. The backlight module according to claim 2, wherein at least one of the retaining walls is disposed on a side of the bottom plate away from the backlight assembly in the first direction.
10. The backlight module according to claim 2, wherein at least two retaining walls are connected to the same bottom plate, at least one of the at least two retaining walls is located at one side of the bottom plate in the first direction, and at least another one of the at least two retaining walls is located at one side of the bottom plate in the second direction.
11. A backlight module according to any one of claims 2-10, wherein the material of the retaining wall comprises plastic and the bottom plate comprises a metallic material.
12. A backlight module according to claim 11, wherein the thickness of the first blocking portion is 0.5mm to 1mm.
13. A backlight module according to claim 2, wherein the limiting portion comprises a protrusion extending in a thickness direction of the backlight module and located on the bottom plate, the printed circuit board has an opening, and the protrusion and the opening are sized to fit so that the protrusion can be located in the opening.
14. The backlight module according to claim 13, wherein a dimension of the convex portion in the thickness direction is smaller than or equal to a dimension of the printed circuit board in the thickness direction.
15. A display device comprising the backlight module of any one of claims 1-14 and a display panel, wherein the display panel is located on a side of the backlight module adjacent to a light emitting surface of the display device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311840864.XA CN117872641A (en) | 2023-12-28 | 2023-12-28 | Backlight module and display device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311840864.XA CN117872641A (en) | 2023-12-28 | 2023-12-28 | Backlight module and display device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN117872641A true CN117872641A (en) | 2024-04-12 |
Family
ID=90585860
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202311840864.XA Pending CN117872641A (en) | 2023-12-28 | 2023-12-28 | Backlight module and display device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN117872641A (en) |
-
2023
- 2023-12-28 CN CN202311840864.XA patent/CN117872641A/en active Pending
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