CN114442216A - Backlight module and display device - Google Patents
Backlight module and display device Download PDFInfo
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- CN114442216A CN114442216A CN202210111599.0A CN202210111599A CN114442216A CN 114442216 A CN114442216 A CN 114442216A CN 202210111599 A CN202210111599 A CN 202210111599A CN 114442216 A CN114442216 A CN 114442216A
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- Prior art keywords
- display panel
- light
- backlight
- backlight module
- groove body
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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
- G02B6/0013—Means for improving the coupling-in of light from the light source into the light guide
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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
- G02B6/0066—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 characterised by the light source being coupled to the light guide
- G02B6/0068—Arrangements of plural sources, e.g. multi-colour light sources
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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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- 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
- G02B6/009—Positioning aspects of the light source in the package
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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
Abstract
The invention discloses a backlight module and a display device. The display device comprises a display panel, and the backlight module comprises a back plate, a first optical assembly, a second optical assembly, a light guide plate and a driving module; the back plate is provided with a first backlight part and a second backlight part, the first backlight part is provided with a first groove body, the second backlight part is provided with a second groove body, and the depth of the first groove body is greater than that of the second groove body, so that an accommodating space is formed on one surface of the second backlight part, which faces away from the display panel; the first optical assembly is arranged in the first groove body, and the light emitting surface of the first light source faces the display panel; the second optical assembly is arranged in the second groove body; the light guide plate covers the first groove body and the second groove body, the first light source is located on one side, back to the display panel, of the light guide plate, the second light source is located on the side edge of the light guide plate, and the driving module is arranged in the containing space. The technical scheme of the invention can reduce the whole thickness of the display device so as to realize miniaturization design and solve the problem that the appearance is influenced by the uneven back surface of the display device.
Description
Technical Field
The invention relates to the technical field of liquid crystal display, in particular to a backlight module and a display device.
Background
The drive module among the present display device is installed at the back of backplate usually to protrusion in the back of backplate, thereby make display device's whole thickness great, be unfavorable for miniaturized design, and still make display device's back unevenness, influence the outward appearance.
Disclosure of Invention
The invention provides a backlight module, which aims to reduce the overall thickness of a display device, realize miniaturization design and solve the problem that the appearance of the display device is influenced by the rugged back surface.
In order to achieve the above object, the present invention provides a backlight module applied to a display device, the display device includes a display panel, and the backlight module includes:
the back plate is opposite to the display panel and is provided with a first backlight part and a second backlight part which are arranged side by side, a first groove body is formed in one surface, close to the display panel, of the first backlight part, a second groove body is formed in one surface, close to the display panel, of the second backlight part, and the depth of the first groove body is larger than that of the second groove body, so that an accommodating space is formed in one surface, back to the display panel, of the second backlight part;
the first optical assembly comprises a first light source, the first optical assembly is arranged in the first groove body, and a light emitting surface of the first light source faces the display panel;
the second optical assembly comprises a second light source and is arranged in the second groove body;
the light guide plate is arranged on one side, close to the display panel, of the back plate and covers the first groove body and the second groove body, the first light source is located on one side, back to the display panel, of the light guide plate, the second light source is located on the side edge of the light guide plate, and the light emitting surface of the second light source faces the side edge of the light guide plate; and
and the driving module is arranged in the accommodating space.
In an embodiment of the invention, the backlight module further includes a rear housing, the rear housing is disposed on a side of the second backlight portion facing away from the display panel, and encloses with a back surface of the second backlight portion to form the accommodating space, and a surface of the rear housing facing away from the display panel is flush with a surface of the first backlight portion facing away from the display panel.
In an embodiment of the invention, the backlight module further includes a light uniformizing plate, and the light uniformizing plate is disposed on one side of the light guide plate close to the display panel and covers the first groove and the second groove.
In an embodiment of the invention, a connection step is provided at a connection position of the first backlight portion and the second backlight portion, and a light distribution structure is provided on a mesa of the connection step and is located on a side of the light guide plate facing away from the display panel.
In an embodiment of the invention, the light distribution structure has a first surface facing the connecting step and a second surface facing away from the connecting step, and the first surface and/or the second surface are/is provided with a dot structure.
In an embodiment of the invention, the backlight module further includes a first reflection sheet, and the first reflection sheet includes a first reflection portion, and the first reflection portion is disposed between the mesa of the connection step and the light distribution structure.
In an embodiment of the invention, the first reflective sheet further includes a second reflective portion and a third reflective portion, the second reflective portion is disposed in the first groove and located on a side of the light guide plate facing away from the display panel, the second reflective portion is provided with an avoiding hole, the first light source penetrates through the avoiding hole, and two opposite sides of the third reflective portion are respectively connected to a side of the first reflective portion and a side of the second reflective portion.
In an embodiment of the invention, the third reflective portion is disposed to be inclined from the bottom wall of the first slot body to the bottom wall of the second slot body.
In an embodiment of the invention, the backlight module further includes a second reflective sheet, and the second reflective sheet is disposed between the light guide plate and the second groove.
In an embodiment of the invention, the backlight module further includes an optical film, the optical film is disposed on one side of the light guide plate close to the display panel and covers the first groove and the second groove;
and/or, the backlight module further comprises a middle frame, and the middle frame is arranged around the back plate.
The invention also provides a display device, which comprises a display panel and a backlight module;
wherein, backlight unit includes:
the back plate is opposite to the display panel and is provided with a first backlight part and a second backlight part which are arranged side by side, a first groove body is formed in one surface, close to the display panel, of the first backlight part, a second groove body is formed in one surface, close to the display panel, of the second backlight part, and the depth of the first groove body is larger than that of the second groove body, so that an accommodating space is formed in one surface, back to the display panel, of the backlight part;
the first optical assembly comprises a first light source, the first optical assembly is arranged in the first groove body, and a light emitting surface of the first light source faces the display panel;
the second optical assembly comprises a second light source and is arranged in the second groove body;
the light guide plate is arranged on one side, close to the display panel, of the back plate and covers the first groove body and the second groove body, the first light source is located on one side, back to the display panel, of the light guide plate, the second light source is located on the side edge of the light guide plate, and the light emitting surface of the second light source faces the side edge of the light guide plate; and
and the driving module is arranged in the accommodating space.
The backlight module is characterized in that the back plate is arranged opposite to the display panel and is provided with a first backlight part and a second backlight part which are arranged side by side, wherein one surface of the first backlight part, which is close to the display panel, is provided with a first groove body, one surface of the second backlight part, which is close to the display panel, is provided with a second groove body, specifically, the first optical assembly is arranged in the first groove body, the second optical assembly is arranged in the second groove body, the light guide plate is arranged on one side of the back plate, which is close to the display panel, and covers the first groove body and the second groove body, the first light source of the first optical assembly is positioned on one side of the light guide plate, which is back to the display panel, the second light source of the second optical assembly is positioned on the side edge of the light guide plate, and the light emitting surface of the second light source faces the side edge of the light guide plate; therefore, the light emitted by the first light source can penetrate through the light guide plate and is emitted towards the display panel to realize direct light emission, the light emitted by the second light source can enter the light guide plate through the side edge of the light guide plate, the light is incident into the light guide plate and is diffused towards all angles, and then the light is emitted towards the display panel from the top of the light guide plate to realize side light emission;
the thickness occupied by the second optical assembly in a side-in light emitting mode is smaller, namely the depth of the first groove body can be larger than that of the second groove body, so that an accommodating space can be formed on one surface of the second backlight portion, which faces away from the display panel, and the driving module can be placed in the accommodating space and cannot protrude out of the back surface of the first backlight portion and further cannot protrude out of the whole back surface of the back plate; therefore, the problem that the driving module protrudes out of the back face of the back plate to cause larger overall thickness of the backlight module is solved, so that the overall thickness of the backlight module is reduced, the overall thickness of the display device is further reduced, and the miniaturization design is realized; and, still can guarantee that backlight unit's the back is comparatively level and smooth, and then guarantee that display device's the back is comparatively level and smooth to solve display device's the unsmooth and uneven problem that influences the outward appearance.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.
FIG. 1 is an exploded view of a backlight module according to an embodiment of the present invention;
FIG. 2 is an exploded view of another view angle of a backlight module according to an embodiment of the present invention;
FIG. 3 is a side view of a backlight module according to an embodiment of the present invention;
FIG. 4 is an enlarged view of a portion of FIG. 3 at A;
FIG. 5 is an enlarged view of a portion of FIG. 3 at B;
FIG. 6 is an exploded view of a display device according to an embodiment of the present invention;
FIG. 7 is an exploded view of another perspective of a display device according to an embodiment of the present invention.
The reference numbers illustrate:
the implementation, functional features and advantages of the objects of the present invention will be further explained with reference to the accompanying drawings.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be noted that, if directional indication is involved in the embodiment of the present invention, the directional indication is only used for explaining the relative positional relationship, the motion situation, and the like between the components in a certain posture, and if the certain posture is changed, the directional indication is changed accordingly.
In addition, if there is a description relating to "first", "second", etc. in the embodiments of the present invention, the description of "first", "second", etc. is for descriptive purposes only and is not to be construed as indicating or implying relative importance or to implicitly indicate the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In addition, technical solutions between various embodiments may be combined with each other, but must be realized by a person skilled in the art, and when the technical solutions are contradictory or cannot be realized, such a combination should not be considered to exist, and is not within the protection scope of the present invention.
The present invention provides a backlight module 100, which aims to reduce the overall thickness of the display device 1000, to achieve a miniaturized design, and to solve the problem that the appearance is affected by the unevenness of the back surface of the display device 1000.
The following description will be made of a specific structure of the backlight module 100 of the present invention:
referring to fig. 1 to 5, in an embodiment of the backlight module 100 of the present invention, the backlight module 100 is applied to a display device 1000, the display device 1000 includes a display panel 200, the backlight module 100 includes a back plate 10, a first optical assembly 20, a second optical assembly 40, a light guide plate 30 and a driving module 50; the back plate 10 is arranged opposite to the display panel 200, and has a first backlight 11 and a second backlight 12 arranged side by side, a first groove 111 is formed in one surface of the first backlight 11 close to the display panel 200, a second groove 121 is formed in one surface of the second backlight 12 close to the display panel 200, and the depth of the first groove 111 is greater than that of the second groove 121, so that an accommodating space 122 is formed in one surface of the second backlight 12 facing away from the display panel 200; the first optical assembly 20 includes a first light source 21 and is disposed in the first groove 111, and a light emitting surface of the first light source 21 faces the display panel 200; the second optical assembly 40 includes a second light source 41 and is disposed in the second groove 121; the light guide plate 30 is disposed on a side of the back plate 10 close to the display panel 200 and covers the first groove 111 and the second groove 121, wherein the first light source 21 is located on a side of the light guide plate 30 facing away from the display panel 200, the second light source 41 is located on a side edge of the light guide plate 30, and a light emitting surface of the second light source 41 faces a side edge of the light guide plate 30; the driving module 50 is disposed in the accommodating space 122.
It can be understood that, the backlight module 100 of the present invention is provided with the first backlight portion 11 and the second backlight portion 12 arranged side by arranging the back plate 10 opposite to the display panel 200, wherein, one side of the first backlight part 11 close to the display panel 200 is provided with a first slot 111, one side of the second backlight part 12 close to the display panel 200 is provided with a second slot 121, specifically, the first optical assembly 20 is arranged in the first slot 111, and the second optical assembly 40 is arranged in the second slot 121, moreover, the light guide plate 30 is disposed on one side of the back plate 10 close to the display panel 200 and covers the first groove body 111 and the second groove body 121, the first light source 21 of the first optical assembly 20 is located on one side of the light guide plate 30 facing away from the display panel 200, the second light source 41 of the second optical assembly 40 is located on a side edge of the light guide plate 30, and a light emitting surface of the second light source 41 faces a side edge of the light guide plate 30; thus, the light emitted from the first light source 21 can pass through the light guide plate and emit towards the display panel to realize direct light emission, while the light emitted from the second light source 41 can enter the light guide plate 30 through the side edge of the light guide plate 30, the light enters the light guide plate 30 and is diffused at various angles, and then the light is emitted towards the display panel from the top of the light guide plate 30 to realize side light emission;
since the second optical element 40 occupies a smaller thickness in the side-in light emitting manner, that is, the depth of the first groove 111 is greater than the depth of the second groove 121, so that the side of the second backlight portion 12 facing away from the display panel 200 forms an accommodating space 122, and the driving module 50 can be placed in the accommodating space 122, and cannot protrude out of the back surface of the first backlight portion 11, and further cannot protrude out of the back surface of the whole back plate 10; thus, the problem that the driving module 50 protrudes out of the back surface of the back plate 10 to cause the overall thickness of the backlight module 100 to be larger is solved, so that the overall thickness of the backlight module 100 is reduced, the overall thickness of the display device 1000 is further reduced, and the miniaturization design is realized; in addition, the back surface of the backlight module 100 can be ensured to be flat, and further the back surface of the display device 1000 can be ensured to be flat, so as to solve the problem that the appearance is affected due to the uneven back surface of the display device 1000.
In practical applications, the depth of the first groove 111 may be greater than or less than the sum of the depth of the second groove 121 and the depth of the accommodating space 122; alternatively, the depth of the first slot 111 may be equal to the sum of the depth of the second slot 121 and the depth of the accommodating space 122, so as to ensure that not only the back surface of the backlight module 100 is relatively flat, but also the front surface of the backlight module 100 is relatively flat.
Moreover, an optical lens is disposed on the top of each first light source 21, so that the light emitted from the first light source 21 can be split twice through the corresponding optical lens, so as to enlarge the light-emitting angle of the first optical assembly 20.
Specifically, the driving module 50 is placed in the accommodating space 122, and may be fixed on the back of the second backlight portion 12 by screws, snaps, adhesives, or the like, so as to ensure the installation performance of the driving module 50.
The light guide plate 30 is prepared by printing a light guide point on the bottom surface of an optical-grade acrylic or polycarbonate plate by using laser engraving, V-shaped cross grid engraving, and UV screen printing techniques, and then using a high-tech material with a very high refractive index and no light absorption.
The first optical assembly 20 further includes a first circuit board 22, the first circuit board 22 is disposed on a side of the first light source 21 opposite to the light guide plate 30 and electrically connected to the first light source 21, the first light source 21 is disposed in a plurality, and the plurality of first light sources 21 are distributed on the first circuit board 22 in an array; and the second optical assembly 40 further includes a second circuit board 42 and a heat sink 43, the second circuit board 42 is disposed on a side of the second light source 41 opposite to the light guide plate 30 and electrically connected to the second light source 41, the second light source 41 is disposed in plurality, the plurality of second light sources 41 are disposed at intervals along a length direction of the second circuit board 42, and the heat sink 43 is disposed on the second light source 41 and the second circuit board 42 to dissipate heat of the second light source 41.
Referring to fig. 1 to fig. 3, in an embodiment of the backlight module 100 of the present invention, the backlight module 100 further includes a rear case 60, the rear case 60 is disposed on a side of the second backlight portion 12 facing away from the display panel 200, and encloses with the second backlight portion 12 to form the accommodating space 122, and a surface of the rear case 60 facing away from the display panel 200 is flush with a surface of the first backlight portion 11 facing away from the display panel 200.
In this way, by covering the rear case 60 on the side of the second backlight portion 12 facing away from the display panel 200, on one hand, the driving module 50 located in the accommodating space 122 can be protected, and on the other hand, the driving module 50 can be prevented from being exposed to the outside to affect the appearance; in addition, by making the surface of the rear case 60 facing away from the display panel 200 flush with the surface of the first backlight unit 11 facing away from the display panel 200, the back surface of the backlight module 100 can be sufficiently ensured to be flat, and further the back surface of the display device 1000 can be sufficiently ensured to be flat.
Specifically, the rear housing 60 may also be fixed to the second backlight portion 12 of the back plate 10 by means of screws, snaps, adhesives, and the like, so as to ensure the installation stability of the rear housing 60.
Referring to fig. 1, fig. 2, fig. 4 and fig. 5, in an embodiment of the backlight module 100 of the present invention, the backlight module 100 further includes a light homogenizing plate 70, and the light homogenizing plate 70 is disposed on a side of the light guide plate 30 close to the display panel 200 and covers the first slot 111 and the second slot 112.
Because the light by first light source 21 outgoing and the homogeneity by the light of second light source 41 outgoing have difference, so, through setting up even worn-out fur 70, and set up even worn-out fur 70 in one side that the light guide plate 30 is close to display panel 200, and cover first cell body 111 and second cell body 121, after even worn-out fur 70 was reachd to the light that sends as first light source 21 and second light source 41 sent, alright mix the light through even worn-out fur 70, in order to obtain even area source, thereby guarantee the holistic light-emitting homogeneity of backlight unit 100, and then guarantee the holistic light-emitting homogeneity of display device 1000.
Specifically, the uniform light plate 70 can obtain a uniform surface light source by controlling the haze, transmittance, internal diffusing agent, foaming characteristics, and the like of the uniform light plate 70.
Specifically, the material of the light homogenizing plate 70 may be one of polystyrene, polymethyl methacrylate, polycarbonate, and the like.
Also, the light unifying plate 70 has a lower surface facing away from the display panel 200 and an upper surface facing the display panel 200; the lower surface of the light uniformizing plate 70 is provided with a light reflecting structure similar to a rough structure of orange peel for reflecting light to increase the optical path of the light, so as to prevent the light from directly exiting to affect the uniformity of the light; in addition, the upper surface of the light homogenizing plate 70 is provided with an increment structure such as a pyramid or a prism, and the increment structure can be used for increasing passing light; in addition, the light homogenizing plate 70 has a hollow structure formed therein, and when light enters the light homogenizing plate 70, the light can be diffused by being refracted and reflected at a critical surface between the hollow structure and the light homogenizing plate 70, thereby further improving the uniformity of the emitted light.
Referring to fig. 1 and fig. 4, in an embodiment of the backlight module 100 of the present invention, a connection step 13 is disposed at a connection portion of the first backlight portion 11 and the second backlight portion 12, a light distribution structure 80 is disposed on a mesa of the connection step 13, and the light distribution structure 80 is located on a side of the light guide plate 30 facing away from the display panel 200.
With such an arrangement, the light distribution structure 80 is arranged on the connecting step 13 at the joint of the first backlight part 11 and the second backlight part 12, and part of light rays emitted by the first light source 21 enter the light distribution structure 80 to be reflected and refracted, so that the brightness of the joint of the first backlight part 11 and the second backlight part 12 is improved, the whole light-emitting uniformity of the backlight module 100 is ensured, and the whole light-emitting uniformity of the display device 1000 is ensured.
Specifically, the material of the light distribution structure 80 may be one of polystyrene, polymethyl methacrylate, polycarbonate, and the like.
Further, referring to fig. 4 in combination, in an embodiment of the backlight module 100 of the present invention, the light distribution structure 80 has a first surface facing the connecting step 13 and a second surface facing away from the connecting step 13, and the first surface and/or the second surface are/is provided with a dot structure 81.
So set up, through being provided with dot structure 81 at the first surface and/or the second surface of grading structure 80, so, when the light that gets into grading structure 80 passes through dot structure 81, alright take place reflection or refraction at dot structure 81 and grading structure 80's critical plane to it is even fully to break up light, alright further guarantee the holistic light-emitting homogeneity of backlight unit 100.
Note that, the dot structure 81 may be provided only on the first surface of the light distribution structure 80; alternatively, the dot structure 81 may be provided only on the second surface of the light distribution structure 80; alternatively, the dot structures 81 are provided on both the first surface and the second surface of the light distribution structure 80.
Specifically, the dot structure 81 may be a convex, concave, or uneven structure, and the cross section of the dot structure 81 may be circular, prismatic, or the like.
Further, referring to fig. 4, in an embodiment of the backlight module 100 of the present invention, the backlight module 100 further includes a first reflection sheet 90, the first reflection sheet 90 includes a first reflection portion 91, and the first reflection portion 91 is disposed between the mesa of the connection step 13 and the light distribution structure 80. So set up, when the light that gets into light distribution structure 80 takes place to reflect or refract inside light distribution structure 80, have partial light can reflect or refract and reach first reflection part 91 department towards the bottom of light distribution structure 80, then reflect the back through first reflection part 91, rethread light distribution structure 80's top light-emitting, alright make full use of light energy to reduce the light energy loss.
Further, referring to fig. 4, in an embodiment of the backlight module 100 of the present invention, the first reflection sheet 90 further includes a second reflection portion 92 and a third reflection portion 93, the second reflection portion 92 is disposed in the first groove 111 and is located on a side of the light guide plate 30 facing away from the display panel 200, the second reflection portion 92 is provided with an avoiding hole, the first light source 21 is disposed through the avoiding hole, and two opposite sides of the third reflection portion 93 are respectively connected to a side of the first reflection portion 91 and a side of the second reflection portion 92.
By arranging the second reflection part 92 in the first groove 111, therefore, when the light emitted by the first light source 21 is subjected to secondary light splitting through the corresponding optical lens, part of the light is reflected or refracted to the second reflection part 92, then reflected by the second reflection part 92 and emitted towards the light guide plate 30, so that the light energy can be fully utilized to reduce the light energy loss; in addition, the third reflection portion 93 is used to connect the first reflection portion 91 and the second reflection portion 92, so that, among the light rays emitted by the first light source 21, the light rays reaching the third reflection portion 93 can be reflected to the light distribution structure 80, so that more light rays enter the light distribution structure 80 to be reflected and refracted, and the brightness of the connection part of the first backlight portion 11 and the second backlight portion 12 is further improved, thereby fully ensuring the overall light-emitting uniformity of the backlight module 100, and further fully ensuring the overall light-emitting uniformity of the display device 1000, or reflected to the second reflection portion 92, and then reflected by the second reflection portion 92 and emitted toward the light guide plate 30, so that the light energy can be fully utilized, and the light energy loss can be reduced.
It should be noted that, when the number of the first light sources 21 is multiple, the second reflecting portion 92 is also provided with a plurality of avoiding holes, so that each first light source 21 penetrates through one avoiding hole.
Further, referring to fig. 4, in an embodiment of the backlight module 100 of the present invention, the third reflective portion 93 is disposed from the bottom wall of the first slot 111 to the bottom wall of the second slot 121.
With such an arrangement, more light emitted from the first light source 21 can reach the light distribution structure 80 after being reflected by the third reflection portion 93, so as to further improve the brightness of the joint of the first backlight portion 11 and the second backlight portion 12, thereby fully ensuring the overall light-emitting uniformity of the backlight module 100, and further fully ensuring the overall light-emitting uniformity of the display device 1000.
Referring to fig. 5, in an embodiment of the backlight module 100 of the present invention, the backlight module 100 further includes a second reflective sheet 110, and the second reflective sheet 110 is disposed between the light guide plate 30 and the second groove 121; through being provided with second reflector plate 110 between light guide plate 30 and second cell body 121, so, after the light that second light source 41 sent got into light guide plate 30, light incided in light guide plate 30 and toward each angle diffusion, then jet out by the top of light guide plate 30, at this in-process, will have some light to be reflected or refract to the bottom of light guide plate 30 and reach second reflector plate 110 department, then reflect through second reflector plate 110, jet back in light guide plate 30 again, with make full use of light energy, thereby reduce the light energy loss.
In practical application, the first reflective sheet 90 and the second reflective sheet 110 may be two separate structures independent from each other; alternatively, the first reflection sheet 90 and the second reflection sheet 110 may be formed as an integral structure.
Moreover, the backlight module 100 further includes an optical film 120, where the optical film 120 is disposed on one side of the light guide plate 30 close to the display panel 200 and covers the first slot 111 and the second slot 121; with this arrangement, the light emitted from the first optical element 20 and the second optical element 40 can enter the optical film 120, so that the light is further uniformly diffused through the optical film 120, thereby ensuring the uniformity of the emitted light.
Moreover, the backlight module 100 further includes a middle frame 130, and the middle frame 130 is disposed around the back plate 10; specifically, the top of the middle frame 130 at least partially extends into the first slot 111 and the second slot 121, so that when the display device 1000 is applied, the display device can be used for supporting the display panel 200, so as to ensure the installation stability of the display panel 200.
Referring to fig. 6 and fig. 7, the present invention further provides a display device 1000, the display device 1000 includes a display panel 200 and the backlight module 100 as described above, and the specific structure of the backlight module 100 is detailed in the foregoing embodiments. Since the display device 1000 adopts all the technical solutions of the foregoing embodiments, at least all the beneficial effects brought by all the technical solutions of the foregoing embodiments are achieved, and no further description is given here. The display panel 200 is disposed on a side of the light guide plate 30 opposite to the back plate 10.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention, and all modifications and equivalents of the present invention, which are made by the contents of the present specification and the accompanying drawings, or directly/indirectly applied to other related technical fields, are included in the scope of the present invention.
Claims (10)
1. The utility model provides a backlight unit, is applied to display device, display device includes display panel, its characterized in that, backlight unit includes:
the back plate is opposite to the display panel and is provided with a first backlight part and a second backlight part which are arranged side by side, a first groove body is formed in one surface, close to the display panel, of the first backlight part, a second groove body is formed in one surface, close to the display panel, of the second backlight part, and the depth of the first groove body is larger than that of the second groove body, so that an accommodating space is formed in one surface, back to the display panel, of the second backlight part;
the first optical assembly comprises a first light source, the first optical assembly is arranged in the first groove body, and a light emitting surface of the first light source faces the display panel;
the second optical assembly comprises a second light source and is arranged in the second groove body;
the light guide plate is arranged on one side, close to the display panel, of the back plate and covers the first groove body and the second groove body, the first light source is located on one side, back to the display panel, of the light guide plate, the second light source is located on the side edge of the light guide plate, and the light emitting surface of the second light source faces the side edge of the light guide plate; and
and the driving module is arranged in the accommodating space.
2. The backlight module according to claim 1, wherein the backlight module further comprises a rear housing, the rear housing is disposed on a side of the second backlight portion facing away from the display panel and encloses the second backlight portion to form the accommodating space, and a surface of the rear housing facing away from the display panel is flush with a surface of the first backlight portion facing away from the display panel;
and/or the backlight module further comprises a light homogenizing plate, wherein the light homogenizing plate is arranged on one side, close to the display panel, of the light guide plate and covers the first groove body and the second groove body.
3. The backlight module according to claim 1, wherein a connection step is provided at a connection portion of the first backlight portion and the second backlight portion, and a light distribution structure is provided on a mesa of the connection step, the light distribution structure being located on a side of the light guide plate facing away from the display panel.
4. The backlight module according to claim 3, wherein the light distribution structure has a first surface facing the connection step and a second surface facing away from the connection step, and the first surface and/or the second surface is provided with a dot structure.
5. The backlight module according to claim 3, wherein the backlight module further comprises a first reflection sheet, the first reflection sheet comprises a first reflection portion, and the first reflection portion is disposed between the mesa of the connection step and the light distribution structure.
6. The backlight module according to claim 5, wherein the first reflector further comprises a second reflector and a third reflector, the second reflector is disposed in the first groove and located on a side of the first light source facing away from the display panel, the second reflector has an avoiding hole, the first light source penetrates through the avoiding hole, and two opposite sides of the third reflector are connected to a side of the first reflector and a side of the second reflector respectively.
7. The backlight module as claimed in claim 6, wherein the third reflective portion is disposed to be inclined from the bottom wall of the first groove to the bottom wall of the second groove.
8. The backlight module as claimed in claim 5, wherein the backlight module further comprises a second reflective sheet disposed between the light guide plate and the second groove.
9. The backlight module according to any one of claims 1 to 8, further comprising an optical film disposed on a side of the light guide plate close to the display panel and covering the first and second grooves;
and/or, the backlight module further comprises a middle frame, and the middle frame is arranged around the back plate.
10. A display device comprising a display panel and the backlight module according to any one of claims 1 to 9.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210111599.0A CN114442216A (en) | 2022-01-29 | 2022-01-29 | Backlight module and display device |
| PCT/CN2023/073613 WO2023143536A1 (en) | 2022-01-29 | 2023-01-28 | Backlight module and display apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210111599.0A CN114442216A (en) | 2022-01-29 | 2022-01-29 | Backlight module and display device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114442216A true CN114442216A (en) | 2022-05-06 |
Family
ID=81372586
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210111599.0A Pending CN114442216A (en) | 2022-01-29 | 2022-01-29 | Backlight module and display device |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN114442216A (en) |
| WO (1) | WO2023143536A1 (en) |
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Also Published As
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| WO2023143536A1 (en) | 2023-08-03 |
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