CN115291433B - Backlight module and display device - Google Patents
Backlight module and display device Download PDFInfo
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- CN115291433B CN115291433B CN202210996718.5A CN202210996718A CN115291433B CN 115291433 B CN115291433 B CN 115291433B CN 202210996718 A CN202210996718 A CN 202210996718A CN 115291433 B CN115291433 B CN 115291433B
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- guide plate
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- 230000008602 contraction Effects 0.000 abstract description 11
- 238000000034 method Methods 0.000 description 15
- 238000010586 diagram Methods 0.000 description 10
- 238000001125 extrusion Methods 0.000 description 8
- 239000012634 fragment Substances 0.000 description 6
- 238000006243 chemical reaction Methods 0.000 description 4
- 239000000853 adhesive Substances 0.000 description 3
- 230000001070 adhesive effect Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000009434 installation Methods 0.000 description 3
- 238000005452 bending Methods 0.000 description 2
- 238000005336 cracking Methods 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 230000005489 elastic deformation Effects 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 210000001503 joint Anatomy 0.000 description 1
- 239000004973 liquid crystal related substance Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
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- 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
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
- G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
- G02B6/0081—Mechanical or electrical aspects of the light guide and light source in the lighting device peculiar to the adaptation to planar light guides, e.g. concerning packaging
- G02B6/0086—Positioning aspects
- G02B6/0088—Positioning aspects of the light guide or other optical sheets in the package
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- Physics & Mathematics (AREA)
- Nonlinear Science (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Mathematical Physics (AREA)
- Chemical & Material Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Planar Illumination Modules (AREA)
Abstract
The application discloses a backlight module and a display device, wherein the backlight module comprises a back plate, a reflecting sheet and a light guide plate, wherein the reflecting sheet is clamped between the back plate and the light guide plate, the back plate comprises a bottom plate and a side plate, and the side plate is connected with the edge of the bottom plate; the backlight module further comprises an elastic piece, wherein the elastic piece is arranged between the side plate and the light guide plate, and one end of the elastic piece is connected with the bottom plate; the light guide plate is abutted with the elastic piece after being expanded, and the maximum expansion amount of the light guide plate is smaller than or equal to the maximum deformation amount of the elastic piece. According to the application, the problem that dislocation light leakage occurs between the light guide plate and the reflecting sheet due to loosening of the light guide plate caused by thermal expansion and cold contraction of the light guide plate is solved.
Description
Technical Field
The present application relates to the field of display technologies, and in particular, to a backlight module and a display device.
Background
Along with the continuous progress of society, people's living standard is continuously improving, and people's demand is higher and higher to display device, and display panel in the display device itself does not have the luminous characteristic, must rely on the light that the light source sent out in the backlight unit just can obtain the display performance, from this, the performance of backlight unit is good and bad directly influences the display quality of liquid crystal panel.
At present, in the backlight module on the market, the light guide plate is generally relatively fixed through the support of the back plate and the butt joint of the gasket positioned on one side of the back plate, and the light guide plate can generate expansion with heat and contraction with cold to cause the light guide plate to loosen in long-time work, when the backlight module is acted by external force, the light guide plate and the reflecting sheet are easier to generate relative sliding to form dislocation between the two, so that light rays emitted by part of light sources cannot normally irradiate the reflecting sheet to generate light loss, and the display quality of the display panel is affected.
How to improve the dislocation light leakage between the light guide plate and the reflecting sheet caused by the loosening of the light guide plate due to the expansion with heat and contraction with cold of the light guide plate becomes a problem to be solved in the field.
Disclosure of Invention
The application aims to provide a backlight module and a display device, which are used for solving the problem that dislocation light leakage occurs between a light guide plate and a reflecting sheet due to looseness of the light guide plate caused by thermal expansion and cold contraction of the light guide plate.
The application discloses a backlight module, which comprises a back plate, a reflecting sheet and a light guide plate, wherein the reflecting sheet is clamped between the back plate and the light guide plate, the back plate comprises a bottom plate and a side plate, and the side plate is connected with the edge of the bottom plate; the backlight module further comprises an elastic piece, wherein the elastic piece is arranged between the side plate and the light guide plate, and one end of the elastic piece is connected with the bottom plate; the light guide plate is abutted with the elastic piece after being expanded, and the maximum expansion amount of the light guide plate is smaller than or equal to the maximum deformation amount of the elastic piece.
Optionally, the backlight module further includes a light emitting element, the light emitting element is disposed between the side plate and the light guide plate, and the elastic element is disposed at a side of the light guide plate away from the light emitting element, at least corresponding to a position of the light emitting element.
Optionally, the elastic component is the shell fragment, the shell fragment includes fixed part and supporting part, the one end of fixed part with the one end of supporting part is connected, fixed part perpendicular to the supporting part forms L type the shell fragment, the fixed part orientation the curb plate sets up, just the fixed part with the bottom plate is connected.
Optionally, the elastic component is the shell fragment, the shell fragment includes fixed part and supporting part, the one end of fixed part with the one end of supporting part is connected, fixed part perpendicular to the supporting part forms L type the shell fragment, the fixed part orientation the light guide plate sets up, be provided with the holding tank on the bottom plate, the fixed part embedding in the holding tank, just the thickness of fixed part is less than or equal to the degree of depth of holding tank.
Optionally, the elastic element is attached to a side of the light guide plate, which is close to the side plate, and the maximum deformation of the elastic element is equal to the maximum expansion of the light guide plate.
Optionally, a slot is formed in the bottom plate, and one end, close to the bottom plate, of the elastic piece is inserted into the slot and is in interference fit with the slot.
Optionally, a gap is formed between the elastic element and the light guide plate, and a distance between the elastic element and the light guide plate is smaller than or equal to a maximum expansion distance of the light guide plate, where, when the distance between the elastic element and the light guide plate is smaller than the maximum expansion distance of the light guide plate, a maximum deformation of the elastic element is greater than or equal to the maximum expansion of the light guide plate.
Optionally, one end of the elastic element, which is close to the bottom plate, is fixedly connected with the bottom plate through a rivet.
Optionally, the curb plate is close to one side of elastic component is provided with the spacing groove, just the spacing groove is kept away from the one end of bottom plate is provided with the chamfer structure, the chamfer structure is the round chamfer.
The application discloses a display device, which comprises a display panel, and the backlight module, wherein the backlight module is arranged on one side of a light incident surface of the display panel.
According to the application, the elastic piece is arranged between the side plate and the light guide plate and is directly connected to the bottom plate, when the light guide plate is heated and expands, the light guide plate can be propped against the elastic piece, and in the process of continuously expanding the light guide plate, the elastic piece can generate elastic deformation to release the expansion amount of the light guide plate, so that the light guide plate can normally expand, at the moment, the elastic piece has a certain restoring force due to deformation, the reaction force can be exerted on the light guide plate to prop against the light guide plate, the light guide plate is prevented from loosening, and when the light guide plate is cooled and contracted, the elastic piece can be restored to deform along with the shrinkage of the light guide plate, and in the process, the elastic piece always props against the light guide plate to loosen, so that the problem of dislocation light leakage between the light guide plate and the reflecting plate is finally caused due to the fact that the light guide plate is relatively slid due to the fact that the expansion and contraction of the light guide plate is effectively avoided. In addition, the elastic piece is directly connected with the bottom plate, so that no gap exists between the bottom plate and the elastic piece, and even if the reflecting sheet slides, the reflecting sheet cannot be inserted into the gap between the elastic piece and the bottom plate, so that excessive dislocation is caused to form light loss; therefore, the application can further improve the light utilization rate of the backlight module and the quality of the display panel.
Drawings
The accompanying drawings, which are included to provide a further understanding of embodiments of the application and are incorporated in and constitute a part of this specification, illustrate embodiments of the application and together with the description serve to explain the principles of the application. It is obvious that the drawings in the following description are only some embodiments of the present application, from which other drawings can be obtained without inventive effort for a person skilled in the art, in which:
FIG. 1 is a schematic diagram of a backlight module according to a first embodiment of the present application;
FIG. 2 is a schematic diagram of a backlight module according to a second embodiment of the application;
FIG. 3 is a schematic diagram of a portion of a backlight module according to a third embodiment of the application;
FIG. 4 is a schematic diagram of a backlight module according to a fourth embodiment of the application;
FIG. 5 is a schematic diagram of a fifth embodiment of a backlight module according to the present application;
FIG. 6 is a schematic diagram of a portion of a back plate of a backlight module according to a sixth embodiment of the application;
FIG. 7 is a schematic diagram of a seventh embodiment of a backlight module according to the present application;
fig. 8 is a schematic diagram of a display device according to an embodiment of the application.
10, A display device; 100. a backlight module; 200. a display panel; 110. a back plate; 111. a bottom plate; 112. a slot; 113. a receiving groove; 114. a limit groove; 120. a side plate; 130. a reflection sheet; 140. a light guide plate; 150. an elastic member; 151. a fixing part; 152. a support part; 153. a spring plate; 160. a light emitting element; 170. a chamfering structure; 180. and (5) riveting a column.
Detailed Description
It is to be understood that the terminology used herein, the specific structural and functional details disclosed are merely representative for the purpose of describing particular embodiments, but that the application may be embodied in many alternate forms and should not be construed as limited to only the embodiments set forth herein.
In the description of the present application, the terms "first", "second" are used for descriptive purposes only and are not to be construed as indicating relative importance or implicitly indicating the number of technical features indicated. Thus, unless otherwise indicated, features defining "first", "second" may include one or more such features either explicitly or implicitly; the meaning of "plurality" is two or more. The terms "comprises," "comprising," and any variations thereof, are intended to cover a non-exclusive inclusion, such that one or more other features, integers, steps, operations, elements, components, and/or groups thereof may be present or added.
In addition, terms of the azimuth or positional relationship indicated by "center", "lateral", "upper", "lower", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., are described based on the azimuth or relative positional relationship shown in the drawings, are merely for convenience of description of the present application, and do not indicate that the apparatus or element referred to must have a specific azimuth, be constructed and operated in a specific azimuth, and thus should not be construed as limiting the present application.
Furthermore, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; either directly or indirectly through intermediaries, or in communication with each other. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art according to the specific circumstances.
The present application will be described in detail below with reference to the drawings and the optional embodiments, and it should be noted that, without conflict, new embodiments may be formed by any combination of the embodiments or technical features described below.
Fig. 1 is a partial schematic view of a first embodiment of a backlight module according to the present application, as shown in fig. 1, the present application discloses a backlight module 100, which includes a back plate 110, a reflective sheet 130 and a light guide plate 140, wherein the reflective sheet 130 is sandwiched between the back plate 110 and the light guide plate 140, the back plate 110 includes a bottom plate 111 and a side plate 120, and the side plate 120 is connected to an edge of the bottom plate 111; the backlight module 100 further includes an elastic member 150, where the elastic member 150 is disposed between the side plate 120 and the light guide plate 140, and one end of the elastic member 150 is connected to the bottom plate 111; the light guide plate 140 is in contact with the elastic member 150 after being expanded, and the maximum expansion amount of the light guide plate 140 is less than or equal to the maximum deformation amount of the elastic member 150.
According to the application, the elastic piece 150 is arranged between the side plate 120 and the light guide plate 140, and the elastic piece 150 is directly connected to the bottom plate 111, when the light guide plate 140 is heated and expanded, the light guide plate 140 is abutted against the elastic piece 150, and in the continuous expansion process of the light guide plate 140, the elastic piece 150 is elastically deformed to release the expansion amount of the light guide plate 140, so that the light guide plate 140 can be normally expanded, at the moment, the elastic piece 150 has a certain elastic restoring force after deformation, a reaction force is formed on the light guide plate 140 to tightly support the light guide plate 140, the light guide plate 140 is prevented from loosening, and when the light guide plate 140 is cooled and contracted, the elastic piece 150 is restored to deform along with the contraction of the light guide plate 140, and in the process, the elastic piece 150 is always abutted against the light guide plate 140 to avoid loosening, so that the problem that the light guide plate 140 and the reflecting plate 130 are relatively slid due to the thermal expansion of the light guide plate 140 and the reflecting plate 130 is finally caused. In addition, the elastic member 150 is directly connected with the bottom plate 111, so that no gap exists between the bottom plate 111 and the elastic member 150, and even if the reflective sheet 130 slides, the reflective sheet is not inserted into the gap between the elastic member 150 and the bottom plate 111, thereby causing excessive dislocation to form light loss; therefore, the light utilization rate of the backlight module 100 can be further improved, and the quality of the display panel 200 can be improved.
It should be noted that, in the present application, the shape of the elastic member 150 may be a strip shape, or may be a two-section structure and have a spring 153 formed by a certain bending angle, the present application does not specifically limit the shape of the elastic member 150, as long as it is satisfied that the elastic member 150 is easy to deform and bend after being pressed between the elastic member and the light guide plate 140, the present application only uses the elastic member 150 as a strip shape or uses the elastic member as the spring 153 having a certain bending angle for illustration, and one end of the elastic member 150 in the present application may be fixed with the bottom plate 111 by using an adhesive, or may be fixed by using a rivet, and the present application is not specifically limited.
In addition, the elastic member 150 of the present application may be disposed not only between the side plate 120 on the light emitting side and the light guide plate 140 (wherein, in the backlight module 100 of the side-entry type light emitting element 160, the side surface on which the light emitting element 160 is disposed and the side surface opposite to the light emitting element 160 are light emitting sides, and the other side surfaces are non-light emitting sides), but also between the side plate 120 on the non-light emitting side and the light guide plate 140, and the present application is exemplified by the provision of the elastic member 150 only between the side plate 120 on the light emitting side and the light guide plate 140 according to design requirements.
If the relative sliding occurs between the reflective sheet 130 and the light guide plate 140, and the sliding direction is just on the light emitting side of the backlight module 100, the light emitted by the light emitting element 160 will leak through the reflective sheet 130 in a large amount from the exposed position after the dislocation, so that obvious light loss is caused, and therefore, the present application is also designed for the elastic member 150 on the light emitting side of the backlight module 100, specifically as follows:
the backlight module 100 further includes a light emitting element 160, the light emitting element 160 is disposed between the side plate 120 and the light guide plate 140, and the elastic member 150 is disposed at least at a position corresponding to the light emitting element 160 and at a side of the light guide plate 140 away from the light emitting element 160.
Since the elastic member 150 forms an easily identifiable region between the position of the elastic member 150 and the position of the light emitting element 160 after installation, the light guide plate 140 can be rapidly positioned during installation, and the light guide plate 140 is rapidly installed between the elastic member 150 and the light emitting element 160, when the reflective sheet 130 is installed, the reflective sheet 130 can be more accurately arranged corresponding to the light guide plate 140 on one side close to the light emitting element 160 according to the positions of the elastic member 150 and the light emitting element 160, so that the alignment of the reflective sheet 130 and the light guide plate 140 is realized, the problem of light loss caused by dislocation between the light guide plate 140 and the reflective sheet 130 caused during installation is avoided, the light utilization rate of the backlight module 100 is improved, and the display effect of the display panel 200 is further improved.
In the actual use process of the backlight module 100, the heat generated by the light emitting element 160 of the backlight module 100 is transferred to the light guide plate 140, the light guide plate 140 expands under long-time heating, and when the light emitting element 160 does not work, the temperature of the light guide plate 140 decreases again to form shrinkage, which leads to easy deformation of the light guide plate 140; when the light guide plate 140 expands to contact with the elastic member 150, the elastic force of the elastic member 150 can be utilized to buffer the extrusion force from the light guide plate 140, so that the situation that the light guide plate 140 is broken due to mutual extrusion between the light guide plate 140 and the elastic member 150 when the light guide plate 140 excessively contacts with the elastic member 150 after expansion can be effectively avoided; meanwhile, the elastic piece 150 can always limit and relatively fix the light guide plate 140 by utilizing the reaction force generated after the deformation of the elastic piece 150, so that the light loss problem caused by dislocation light leakage is formed due to the fact that the light guide plate 140 and the reflecting sheet 130 relatively slide due to the fact that the dimensional change of the light guide plate 140 is loose due to expansion caused by heat and contraction caused by cold is avoided, the light utilization rate of the backlight module 100 is further improved, and the display effect of the display panel 200 is further improved.
Further, as shown in fig. 1, the elastic member 150 is attached to a side of the light guide plate 140 near the side plate 120, and the maximum deformation of the elastic member 150 is equal to the maximum expansion of the light guide plate 140.
In this embodiment, the elastic member 150 is attached to the side of the light guide plate 140 near the side plate 120, that is, there is no space between the elastic member 150 and the light guide plate 140, when the light guide plate 140 is expanded by heat, the elastic member 150 directly presses the elastic member 150, and after receiving the force generated by the expansion of the light guide plate 140, the elastic member 150 deforms and bends to release the expansion of the light guide plate 140, in this process, the elastic member 150 is always abutted against the light guide plate 140, and under the action of the elastic restoring force of the elastic member 150, the elastic member 150 forms a "dynamic fixation" on the light guide plate 140, that is, the elastic member 150 deforms, the light guide plate 140 is expanding, but the light guide plate 140 always maintains a stable state relative to the elastic member 150, so as to avoid the problem that the light guide plate 140 and the reflecting plate 130 slide relatively and generate dislocation.
In addition, since one end of the elastic member 150 is fixed on the bottom plate 111, the light guide plate 140 is limited by the elastic member 150 even if the light guide plate 140 expands, so as to avoid excessive displacement of the light guide plate 140, and meanwhile, after the light guide plate 140 contracts, the expansion gradually recovers, the elastic member 150 also slowly recovers to gradually reduce the deformation, in the process, the elastic member 150 is always kept in contact with the light guide plate 140, so that the light guide plate 140 is prevented from sliding relatively with the reflecting sheet 130 during the contraction process, and the problem of dislocation light leakage is generated, so that the structural stability of the backlight module 100 is further improved, and the light utilization rate of the backlight module 100 is improved.
Fig. 2 is a schematic partial view of a second embodiment of the backlight module according to the present application, as shown in fig. 2, a gap is formed between the elastic member 150 and the light guide plate 140, and a distance between the elastic member 150 and the light guide plate 140 is smaller than or equal to a maximum expansion distance of the light guide plate 140, wherein when the distance between the elastic member 150 and the light guide plate 140 is smaller than the maximum expansion distance of the light guide plate 140, a maximum deformation amount of the elastic member 150 is greater than or equal to the maximum expansion amount of the light guide plate 140.
Unlike the previous embodiment, in this embodiment, the elastic member 150 and the light guide plate 140 have a predetermined distance, and are not in direct contact with each other, and since the light guide plate 140 is expanded with heat and contracted with cold during use, a certain distance needs to be reserved between the elastic member 150 and the light guide plate 140 to prevent the elastic member 150 from being excessively extruded when the light guide plate 140 is deformed, which results in the occurrence of cracking of the light guide plate 140. When the distance between the elastic member 150 and the light guide plate 140 is smaller than the maximum expansion distance of the light guide plate 140, the light guide plate 140 will not contact with the elastic member 150 when it is heated and expanded, so that the elastic member 150 will not obstruct the initial expansion of the light guide plate 140, and avoid the light guide plate 140 from being excessively extruded before reaching the maximum expansion, resulting in the occurrence of cracking of the light guide plate 140. When the light guide plate 140 expands to a certain extent, the light guide plate 140 contacts with the elastic member 150, and when the light guide plate 140 continues to expand, the elastic member 150 is extruded, and as a part of expansion amount of the light guide plate 140 is released before the light guide plate 140 contacts with the elastic member 150, when the light guide plate 140 reaches the maximum expansion amount, only part of extrusion force is caused to the elastic member 150, and the maximum deformation amount of the elastic member 150 is greater than or equal to the maximum expansion amount of the light guide plate 140, so that the situation that the light guide plate 140 is broken or the elastic member 150 is damaged due to the extrusion between the light guide plate 140 and the elastic member 150 can be effectively avoided; meanwhile, the elastic piece 150 can well limit and fix the light guide plate 140 under the condition of small deformation, so that the problem that the light guide plate 140 and the reflecting sheet 130 are misplaced and leaked due to relative sliding between the light guide plate 140 and the reflecting sheet 130 caused by loosening of expansion caused by heat and contraction caused by cold of the light guide plate 140 is avoided.
The preset distance between the elastic member 150 and the light guide plate 140 is set to be equal to the maximum expansion distance of the light guide plate 140, so that the light guide plate 140 can not cause obvious extrusion to the elastic member 150 under the limit deformation, and further the problem of breakage of the light guide plate 140 caused by extrusion generated by deformation of the light guide plate 140 is prevented.
Fig. 3 is a schematic partial view of a third embodiment of a backlight module according to the present application, as shown in fig. 3, the elastic member 150 is a spring plate 153, the spring plate 153 includes a fixing portion 151 and a supporting portion 152, one end of the fixing portion 151 is connected with one end of the supporting portion 152, the fixing portion 151 is perpendicular to the supporting portion 152 to form an L-shaped spring plate 153, the fixing portion 151 is disposed towards the side plate 120, and the fixing portion 151 is connected with the bottom plate 111.
In this embodiment, the structure of the elastic member 150 is improved, the elastic member 150 is a spring plate 153, the spring plate 153 is thinner and is easy to elastically deform, and is easy to recover after deformation, so that the light guide plate 140 is extruded with the elastic member 150 in the expansion process, the elastic member 150 is easier to release the expansion amount of the light guide plate 140 through deformation, and the light guide plate 140 is prevented from being broken due to excessive extrusion between the light guide plate 140 and the elastic member 150; meanwhile, when the light guide plate 140 expands and contracts, the elastic piece 150 more easily follows the change of the expansion amount of the light guide plate 140, and continuously abuts against the light guide plate 140, so that the light guide plate 140 is prevented from loosening in the process of expanding with heat and contracting with cold, and relative sliding is generated between the light guide plate 140 and the reflecting sheet 130, dislocation light leakage is formed, and the light utilization rate of the backlight module 100 and the structural stability of the backlight module 100 are further improved.
The elastic member 150 comprises two parts, namely the fixing part 151 and the supporting part 152, the fixing part 151 and the supporting part 152 form the L-shaped elastic member 150, the fixing part 151 can be connected with the bottom plate 111 in an adhesive manner, so that stable fixation between the elastic member 150 and the bottom plate 111 is formed, when the supporting part 152 of the elastic member 150 is extruded after the light guide plate 140 is expanded, the elastic member 150 is not easy to fall off, the elastic member 150 can stably limit the light guide plate 140, and the structural stability of the backlight module 100 is further improved;
In addition, the fixing portion 151 of the L-shaped elastic member 150 is disposed towards the side plate 120, and the reflective sheet 130 exactly corresponds to the connection portion between the fixing portion 151 and the supporting portion 152, so that the reflective sheet 130 is effectively prevented from being tilted after one side of the reflective sheet 130 contacts the fixing portion 151 in the process of sliding relative to the light guide plate 140, and the elastic member 150 can prevent the reflective sheet 130 from being excessively dislocated between the sliding formation of the reflective sheet 130 and the light guide plate 140 to cause light loss, and maintain structural stability of the reflective sheet 130.
Fig. 4 is a schematic partial view of a fourth embodiment of a backlight module according to the present application, as shown in fig. 4, the elastic member 150 is a spring plate 153, the spring plate 153 includes a fixing portion 151 and a supporting portion 152, one end of the fixing portion 151 is connected with one end of the supporting portion 152, the fixing portion 151 is perpendicular to the supporting portion 152 to form an L-shaped spring plate 153, the fixing portion 151 is disposed towards the light guide plate 140, the bottom plate 111 is provided with a receiving groove 113, the fixing portion 151 is embedded into the receiving groove 113, and the thickness of the fixing portion 151 is less than or equal to the depth of the receiving groove 113.
In this embodiment, the accommodating groove 113 is provided on the bottom plate 111, when the elastic member 150 is installed, the fixing portion 151 of the elastic member 150 can be embedded into the accommodating groove 113, and the fixing portion 151 is fixed in the accommodating groove 113 by using an adhesive, so that stable fixation between the elastic member 150 and the bottom plate 111 is formed, when the elastic member 150 is extruded after the light guide plate 140 is expanded, the elastic member 150 is not easy to fall off, so that the elastic member 150 can stably limit the light guide plate 140, the problem that the light guide plate 140 slides relatively with the reflecting plate 130 after dimensional change due to expansion and contraction, and dislocation light leakage is generated is further improved, and the quality of the display panel 200 is improved.
The thickness of the fixing portion 151 is less than or equal to the depth of the accommodating groove 113, so that the fixing portion 151 does not protrude from the side of the bottom plate 111, which is close to the reflective sheet 130, and when the reflective sheet 130 slides relatively to the light guide plate 140, the reflective sheet 130 is prevented from contacting the fixing portion 151 to generate edge tilting, meanwhile, since the elastic member 150 falls into the accommodating groove 113 through the fixing portion 151, no gap exists between the bottom plate 111 and the elastic member 150 at the position corresponding to the reflective sheet 130, and even if the reflective sheet 130 slides, no gap is inserted between the elastic member 150 and the bottom plate 111, so that excessive dislocation between the reflective sheet 130 and the light guide plate 140 causes light loss, thereby further improving the light utilization rate of the backlight module 100 and the quality of the display panel 200.
Fig. 5 is a schematic partial view of a fifth embodiment of the backlight module according to the present application, as shown in fig. 5, a slot 112 is disposed on the bottom plate 111, and an end of the elastic member 150 near the bottom plate 111 is inserted into the slot 112 and is in interference fit with the slot 112.
In order to connect the elastic member 150 with the bottom plate 111 stably, the elastic member 150 is prevented from being extruded after the light guide plate 140 is expanded, so that the elastic member 150 is prevented from falling off from the bottom plate 111, in this embodiment, the slot 112 is arranged on the bottom plate 111, when the elastic member 150 is installed, one end of the elastic member 150 is inserted into the slot 112, and the elastic member 150 is firmly clamped in the slot 112 through interference fit between the slot 112 and the elastic member 150, so that the elastic member 150 is prevented from shaking and falling off easily even if the elastic member 150 repeatedly occurs extrusion between the elastic member 150 and the light guide plate 140 after the expansion of the light guide plate 140, the light guide plate 140 is prevented from sliding relatively with the reflecting plate 130 after the dimensional change due to thermal expansion and contraction of the light guide plate, and the problem of dislocation and light leakage is further improved, and the quality of the backlight module 100 is further improved.
Fig. 6 is a schematic partial view of a back plate of a sixth embodiment of the backlight module according to the present application, as shown in fig. 6, in order to make the connection between the elastic member 150 and the bottom plate 111 more firm, so as to avoid the elastic member 150 falling off due to the elastic member 150 being extruded by the light guide plate 140 after expansion, the application may also fixedly connect one end of the elastic member 150, which is close to the bottom plate 111, with the bottom plate 111 through the rivet 180. After the rivet 180 is used to fix one end of the elastic member 150 on the bottom plate 111, even if the light guide plate 140 repeatedly expands with heat and contracts with cold to squeeze the elastic member 150, or the elastic member 150 is subjected to external force, the elastic member 150 is not caused to fall off from the bottom plate 111, so that the stability of connection between the elastic member 150 and the bottom plate 111 is further improved.
In addition, since the elastic member 150 is directly inserted into the slot 112 of the bottom plate 111, there is no gap between the bottom plate 111 and the elastic member 150 at the position corresponding to the reflective sheet 130, and even if the reflective sheet 130 slides, the gap between the elastic member 150 and the bottom plate 111 is not inserted, so that excessive dislocation between the reflective sheet 130 and the light guide plate 140 forms light loss, thereby further improving the light utilization rate of the backlight module 100 and the quality of the display panel 200.
Of course, the slot 112 of the present application may be a groove or a through groove, and the embodiment only uses the slot 112 as the groove for illustration, but when the slot 112 is a through groove, the portion of the elastic member 150 inserted into the through groove does not protrude from the surface of the side of the bottom plate 111 away from the reflective sheet 130, so that the outer surface of the bottom plate 111 has no unnecessary protruding portion, and the aesthetic degree of the back plate 110 is improved.
Fig. 7 is a schematic diagram of a portion of a backlight module according to a seventh embodiment of the application, as shown in fig. 7, a limiting groove 114 is disposed on a side of the side plate 120 near the elastic member 150, and a chamfering structure 170 is disposed on an end of the limiting groove 114 far from the bottom plate 111, wherein the chamfering structure 170 is a round chamfer.
In this embodiment, unlike the previous embodiment, the limiting groove 114 is disposed on the side of the elastic member 150 away from the bottom plate 111, when the light guide plate 140 is heated and expanded, the elastic member 150 is extruded, and the elastic member 150 is deformed and bent after being extruded, after the light guide plate 140 is completely expanded, one end of the elastic member 150 away from the bottom plate 111 is abutted to the side plate 120 and clamped into the limiting groove 114, and the elastic member 150 forms stable support and limitation on the side plate 120 through the clamping connection between the limiting groove 114 and the elastic member 150, so that the elastic member 150 is prevented from sliding on the side plate 120 to cause no stable contact with the light guide plate 140, the light guide plate 140 is loosened, the light loss problem caused by dislocation due to the relative sliding between the light guide plate 140 and the reflecting plate 130 is effectively improved, the light utilization rate of the backlight module 100 is improved, and the structural stability of the backlight module 100 is further improved.
When the light-emitting element 160 stops working, the light guide plate 140 is cooled and contracted, along with the gradual decrease of the expansion amount of the light guide plate 140, the elastic member 150 is gradually restored, wherein one end of the elastic member 150 slides along the side wall of the side of the limit groove 114 away from the bottom plate 111, so that the elastic member 150 is easier to restore to the original state when the light guide plate 140 is cooled and contracted, in this embodiment, the end of the limit groove 114 away from the bottom plate 111 is provided with the chamfer structure 170, and the chamfer structure 170 is a round chamfer, so that when the acting force between the elastic member 150 and the light guide plate 140 is gradually decreased, one end of the elastic member 150 slides along the round chamfer to enable the elastic member 150 to slide out of the limit groove 114, and not to be always clamped in the limit groove 114, so that the elastic member 150 is easier to restore to the original state, and when the light guide plate 140 is contracted, the relative fixation of the light guide plate 140 is still maintained, and the structural stability of the backlight module 100 is improved.
Fig. 8 is a schematic diagram of an embodiment of a display device according to the present application, as shown in fig. 8, the present application further discloses a display device 10, including a display panel 200, the display device 10 further includes the above-mentioned backlight module 100, and the backlight module 100 is disposed at one side of the light incident surface of the display panel 200.
Since the display panel 200 does not emit light, the backlight module 100 is disposed on one side of the light incident surface of the display panel 200 to provide the light emitting element 160 for the display panel 200, so as to ensure the normal display of the display panel 200; when the light emitting element 160 starts to work, the light guide plate 140 in the backlight module 100 is heated and expanded, when the light emitting element 160 stops working, the light guide plate 140 is cooled and contracted, which causes the dimensional change of the light guide plate 140 to loosen, and then in the actual use process of the display device 10, the backlight module 100 is subjected to the action of external force possibly due to the factors of carrying or colliding with, so that the relative sliding between the light guide plate 140 and the reflecting sheet 130 in the backlight module 100 is more likely to occur, and part of light emitted by the light emitting element 160 cannot be directly irradiated to the reflecting sheet 130, so that light loss is formed, the light utilization rate of the backlight module 100 is reduced, and the display quality of the display panel 200 is affected.
Therefore, the application improves the backlight module 100 in the display device 10, specifically, the application sets the elastic piece 150 between the side plate 120 and the light guide plate 140, and the elastic piece 150 is directly connected to the bottom plate 111, when the light guide plate 140 is heated and expands, the light guide plate 140 can be abutted to the elastic piece 150, the elastic piece 150 can generate elastic deformation to release the expansion amount of the light guide plate 140 in the continuous expansion process of the light guide plate 140, so that the light guide plate 140 can be normally expanded, at this time, the elastic piece 150 has a certain restoring force due to deformation, a reaction force can be formed on the light guide plate 140 to abut against the light guide plate 140, the elastic piece 150 can restore deformation along with the shrinkage of the light guide plate 140, in this process, the elastic piece 150 always abuts against the light guide plate 140 to avoid the loosening of the light guide plate 140, in this process, so that the light guide plate 140 and the reflecting sheet 130 are easy to generate relative sliding, the light guide plate 140 and the reflecting sheet 130 can easily generate relative sliding, even if the light guide plate 140 is not excessively displaced, the gap between the light guide plate 130 and the bottom plate is not directly connected with the bottom plate 111, the problem that the gap between the light guide plate is not formed, and the bottom plate 111 is further avoided, and the gap is avoided, and the gap between the light guide plate is not directly formed, and the light guide plate is not lost, and the light guide plate is not damaged, and the gap is not easily caused, and the gap between the reflecting plate 130 is directly has the quality and the quality is easily caused.
It should be noted that, the inventive concept of the present application can form a very large number of embodiments, but the application documents are limited in space and cannot be listed one by one, so that on the premise of no conflict, the above-described embodiments or technical features can be arbitrarily combined to form new embodiments, and after the embodiments or technical features are combined, the original technical effects will be enhanced.
The above description of the application in connection with specific alternative embodiments is further detailed and it is not intended that the application be limited to the specific embodiments disclosed. It will be apparent to those skilled in the art that several simple deductions or substitutions may be made without departing from the spirit of the application, and these should be considered to be within the scope of the application.
Claims (7)
1. A backlight module comprises a back plate, a reflecting sheet and a light guide plate, wherein the reflecting sheet is clamped between the back plate and the light guide plate,
The backboard comprises a bottom board and side boards, and the side boards are connected to the edge of the bottom board; the backlight module further comprises an elastic piece, wherein the elastic piece is arranged between the side plate and the light guide plate, and one end of the elastic piece is connected with the bottom plate;
the light guide plate is abutted with the elastic piece after being expanded, and the maximum expansion amount of the light guide plate is smaller than or equal to the maximum deformation amount of the elastic piece;
A gap is formed between the elastic piece and the light guide plate, the distance between the elastic piece and the light guide plate is smaller than or equal to the maximum expansion distance of the light guide plate, and when the distance between the elastic piece and the light guide plate is smaller than the maximum expansion distance of the light guide plate, the maximum deformation of the elastic piece is larger than or equal to the maximum expansion of the light guide plate; a gap is formed between the elastic piece and the side plate;
a limiting groove is formed in one side, close to the elastic piece, of the side plate, a chamfering structure is arranged at one end, far away from the bottom plate, of the limiting groove, and the chamfering structure is a round chamfer;
when the light guide plate is fully expanded, one end of the elastic piece, which is far away from the bottom plate, is abutted to the side plate and clamped into the limiting groove;
When the light guide plate is cooled and contracted, one end of the elastic piece slides along the side wall of the limit groove away from one side of the bottom plate.
2. The backlight module according to claim 1, further comprising a light emitting element disposed between the side plate and the light guide plate, wherein the elastic member is disposed at a side of the light guide plate away from the light emitting element at least corresponding to a position of the light emitting element.
3. The backlight module according to claim 2, wherein the elastic member is a spring plate, the spring plate includes a fixing portion and a supporting portion, one end of the fixing portion is connected with one end of the supporting portion, the fixing portion is perpendicular to the supporting portion to form an L-shaped spring plate, the fixing portion is disposed towards the side plate, and the fixing portion is connected with the bottom plate.
4. The backlight module according to claim 2, wherein the elastic member is a spring plate, the spring plate includes a fixing portion and a supporting portion, one end of the fixing portion is connected with one end of the supporting portion, the fixing portion is perpendicular to the supporting portion to form an L-shaped spring plate, the fixing portion is disposed towards the light guide plate, a receiving groove is disposed on the bottom plate, the fixing portion is embedded into the receiving groove, and a thickness of the fixing portion is less than or equal to a depth of the receiving groove.
5. The backlight module according to claim 2, wherein the bottom plate is provided with a slot, and the elastic member is inserted into the slot near one end of the bottom plate and is in interference fit with the slot.
6. The backlight module according to claim 2, wherein one end of the elastic member, which is close to the bottom plate, is fixedly connected with the bottom plate through a rivet.
7. A display device comprising a display panel, wherein the display device further comprises a backlight module according to any one of claims 1 to 6, the backlight module being disposed on one side of the light entrance surface of the display panel.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210996718.5A CN115291433B (en) | 2022-08-19 | 2022-08-19 | Backlight module and display device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210996718.5A CN115291433B (en) | 2022-08-19 | 2022-08-19 | Backlight module and display device |
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| CN115291433A CN115291433A (en) | 2022-11-04 |
| CN115291433B true CN115291433B (en) | 2024-05-03 |
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| CN202210996718.5A Active CN115291433B (en) | 2022-08-19 | 2022-08-19 | Backlight module and display device |
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| CN116928280B (en) * | 2023-09-14 | 2023-12-15 | 惠科股份有限公司 | Backlight module and display device |
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| CN201166761Y (en) * | 2008-04-03 | 2008-12-17 | 北京京东方光电科技有限公司 | Backlight source module for LCD device |
| CN204084047U (en) * | 2014-09-26 | 2015-01-07 | 京东方光科技有限公司 | Backlight module and display unit |
| KR101929289B1 (en) * | 2017-10-18 | 2018-12-14 | 주식회사 신성이엔지 | A protection structure for LED-edge lighting packag |
| CN208239765U (en) * | 2018-05-24 | 2018-12-14 | 昆山龙腾光电有限公司 | A kind of backlight module and liquid crystal display device |
| CN211061821U (en) * | 2019-10-11 | 2020-07-21 | 昆山龙腾光电股份有限公司 | Backlight module and display device |
| CN216118308U (en) * | 2021-09-24 | 2022-03-22 | 茂佳科技(广东)有限公司 | Backlight module and display device |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN201166761Y (en) * | 2008-04-03 | 2008-12-17 | 北京京东方光电科技有限公司 | Backlight source module for LCD device |
| CN204084047U (en) * | 2014-09-26 | 2015-01-07 | 京东方光科技有限公司 | Backlight module and display unit |
| KR101929289B1 (en) * | 2017-10-18 | 2018-12-14 | 주식회사 신성이엔지 | A protection structure for LED-edge lighting packag |
| CN208239765U (en) * | 2018-05-24 | 2018-12-14 | 昆山龙腾光电有限公司 | A kind of backlight module and liquid crystal display device |
| CN211061821U (en) * | 2019-10-11 | 2020-07-21 | 昆山龙腾光电股份有限公司 | Backlight module and display device |
| CN216118308U (en) * | 2021-09-24 | 2022-03-22 | 茂佳科技(广东)有限公司 | Backlight module and display device |
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| CN115291433A (en) | 2022-11-04 |
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