CN205640523U - Backplate, Backlight unit and display device - Google Patents
Backplate, Backlight unit and display device Download PDFInfo
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- CN205640523U CN205640523U CN201620383758.2U CN201620383758U CN205640523U CN 205640523 U CN205640523 U CN 205640523U CN 201620383758 U CN201620383758 U CN 201620383758U CN 205640523 U CN205640523 U CN 205640523U
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- edge
- backboard
- main part
- extension
- kink
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Abstract
The utility model provides a backplate, backlight unit and display device. The backplate is including the main part that has platelike structure, the main part is including relative each other first dominant surface and second dominant surface, and extension, the extension includes the follow the first edge of main part along with the first portion that extends in the direction that first dominant surface intersects, and follow the first portion with be connected to the opposite one side orientation in one side of main part the second portion of the middle part extension of main part, the second portion with the main part separates and part overlapping at least in main part thickness direction each other, wherein, being close to of main part the part of extension is provided with hollow out construction. Adopt the backlight unit of this kind of backplate, can make the location of LED lamp strip more accurate, guaranteed the light efficiency.
Description
Technical field
It relates to a kind of backboard, back light unit and display device.
Background technology
Back light unit generally includes backboard, is arranged at the light guide plate of backboard side, with light guide plate in the face of the light source arranged, such as, LED light source.In order to improve the light efficiency of back light unit, such as, the opticses such as reflector plate, diffusion sheet and brightness enhancement film can be set further.For having the backboard of U folded structure, during assembling backlight unit, lamp bar typically uses the mode filling in U folded structure from front.Under normal circumstances, the opening of U folded structure is less, and therefore the assembling of lamp bar is the most difficult, and the situations such as location inaccuracy even lamp bar torsional deformation easily occurs, affects the light efficiency of light source.
Utility model content
At least one embodiment of the present utility model relates to a kind of backboard, back light unit and display device, and this back board structure can make the assembling of lamp bar more accurate, it is ensured that light efficiency.
An aspect of the present utility model provides a kind of backboard, including: having the main part of platy structure, described main part includes the first first type surface relative to each other and the second first type surface；Extension, described extension includes from the first edge of described main part along the upwardly extending Part I in side intersected with described first first type surface, and from the side contrary with the side being connected to described main part of described Part I towards the Part II of the middle part of described main part extension, described Part II and described main part are spaced and least partially overlapped on the thickness direction of described main part；Wherein, the part of the close described extension of described main part is provided with engraved structure.
In one embodiment, described Part I is vertical with described first first type surface, described Part II and described first major surfaces in parallel.
In one embodiment, described engraved structure extends along the direction being parallel to described first edge, the part at close described first edge of described main part includes ledge structure, described ledge structure includes the connecting portion at the first edge of kink that the Part II towards described extension bends and the edge of close described Part II connecting described kink and described main part, and described engraved structure is positioned at the part of the close described kink of described kink and described connecting portion.
In one embodiment, described backboard includes the part of non-hollow out respectively in the both sides of the bearing of trend of described engraved structure.
In one embodiment, the kink of described ledge structure along the size of the thickness direction of described main part in the range of 0.1mm to 0.3mm.
In one embodiment, on main part thickness direction, described engraved structure is least partially overlapped with the described Part II of described extension.
In one embodiment, see in being parallel to the plane graph of the first first type surface of described main part, described engraved structure includes the strip structure extended along the first edge of described main part, and and edge prominent to described first edge from described strip structure is parallel to the spaced multiple prominent structures in direction at described first edge.
In one embodiment, described prominent structure size on the direction being perpendicular to described first edge is in the range of 0.8mm to 1.3mm.
In one embodiment, described prominent structure is along being parallel to the size at described first edge in the range of 3.2mm to 4.4mm.
In one embodiment, described prominent structure is rectangular shape.
In one embodiment, the sidewall around described engraved structure of described main part is coated with insulating barrier.
In one embodiment, the material of described insulating barrier is plastics or rubber.
Of the present utility model another aspect provides a kind of back light unit including above-mentioned backboard, wherein, the Part I of the extension of described backboard extends along from described second first type surface to the direction of described first first type surface, described back light unit also includes: LED lamp bar, it is arranged at the second main surface side of described main part, and includes strip-form base and the spaced multiple LED chip of bearing of trend along described strip-form base；Light guide plate, is arranged at the first main surface side of the main part of described backboard, and wherein, the LED chip of described LED lamp bar passes described engraved structure, and the exiting surface of described LED chip is in the face of the incidence surface of described light guide plate.
In one embodiment, described engraved structure is parallel to described first edge and extends, the part at close described first edge of described main part includes ledge structure, described ledge structure includes kink that the Part II towards described extension bends and the edge of close described Part II connecting described kink and the connecting portion at described first edge, and described engraved structure is positioned at described kink and the described connecting portion part near described kink.
In one embodiment, the kink of described ledge structure is identical with the thickness of described LED lamp bar along the size of the thickness direction of described main part.
In one embodiment, the length of described engraved structure is more than or equal to the length of described LED lamp bar.
In one embodiment, on the thickness direction of described backboard, described engraved structure is least partially overlapped with described extension.
In one embodiment, see in being parallel to the plane graph of the first first type surface of described main part, described engraved structure includes the strip structure extended along the first edge of described main part, and it is prominent to described first edge from described strip structure and along being parallel to the spaced multiple prominent structures in direction at described first edge, at least partially embedded described prominent structure of LED chip in described LED lamp bar.
In one embodiment, described prominent structure size on the direction being perpendicular to described first edge is in the range of 0.8mm to 1.3mm.
In one embodiment, described prominent structure is along being parallel to the size at the first edge in the range of 3.2mm to 4.4mm.
In one embodiment, described substrate is positioned at the part of LED both sides in the width direction and fixes with described second main surface side of described backboard and close described first main surface side of described light guide plate and the part surface that exposed by described engraved structure respectively.
Another aspect of the present utility model provides and a kind of includes the above-mentioned display device stating back light unit.
Embodiment of the present utility model has one of a following technique effect:
(1) backboard of this utility model embodiment, by arranging engraved structure at backboard, can make LED lamp bar install from the backboard back side when assembling backlight unit, improves installation accuracy, it is ensured that the light efficiency of back light unit.
(2) backboard of this utility model embodiment, by setting table stage structure and size thereof, can make the light that the LED chip light extraction face of LED lamp bar sends well into light guide plate, improve display brightness.
(3) this utility model arranges multiple projection by the engraved structure side at backboard, can improve the positioning precision of LED chip, and can effectively protect LED.
Accompanying drawing explanation
In order to be illustrated more clearly that the technical scheme of this utility model embodiment, the accompanying drawing of embodiment will be briefly described below, it should be apparent that, the accompanying drawing in describing below merely relates to embodiments more of the present utility model, rather than to restriction of the present utility model.
Fig. 1 is the schematic perspective view of the back board structure of this utility model embodiment；
Fig. 2 is the schematic perspective view that the backboard of this utility model embodiment includes engraved structure and ledge structure；
Fig. 3 is the schematic top plan view that the main part of this utility model embodiment is provided with engraved structure；
Fig. 4 a is the schematic perspective view of the backboard installation lamp bar of this utility model embodiment；
Fig. 4 b is the schematic perspective view of the structure of backlight unit of this utility model embodiment；
Fig. 4 c is the cross-sectional schematic of the back light unit of this utility model embodiment；
Fig. 5 a-5d is the schematic perspective view of the assemble method of the back light unit of this utility model embodiment.
Detailed description of the invention
For making the purpose of this utility model, technical scheme and advantage clearer, below in conjunction with the accompanying drawing of this utility model embodiment, the technical scheme of this utility model embodiment is clearly and completely described.Obviously, described embodiment is a part of embodiment of the present utility model rather than whole embodiments.Based on described embodiment of the present utility model, the every other embodiment that those of ordinary skill in the art are obtained on the premise of without creative work, broadly fall into the scope of this utility model protection.
Embodiment of the present utility model provides a kind of backboard, including: having the main part of platy structure, described main part includes the first first type surface relative to each other and the second first type surface；And extension, described extension includes from the first edge of described main part along the upwardly extending Part I in side intersected with described first first type surface, and from the side contrary with the side being connected to described main part of described Part I towards the Part II of the middle part of described main part extension, described Part II and described main part are spaced and least partially overlapped on the thickness direction of described main part；Wherein, the part of the close described extension of described main part is provided with engraved structure.
Such as, Part II is spaced with main part and refers to that the two does not contacts；Main part is platy structure, has certain thickness, and main part thickness direction such as refers to be perpendicular to the first first type surface of main part or the direction of the second first type surface.Part II is least partially overlapped with main part such as refers to that Part II is least partially overlapped with the projection in above-mentioned plane of the described main part along the projection in the plane being parallel to described main part of the described thickness direction.Such as, the projection of above-mentioned Part II can entirely fall in the projection in aforementioned body portion, can also be for above-mentioned extension in only some drops into the projection in aforementioned body portion, it can form " U " type kink with main part, should such as may be used for blocking the light guide plate of back light unit by " U " type kink.Use the backboard of this structure, lamp bar can be installed easily and accurately, to obtain the preferable back light unit of light efficiency.
With reference to Fig. 1, backboard includes main part 1 and extension 2.Main part 1 includes the first first type surface relative to each other and the second first type surface.Extension includes from the edge 11 of main part 1 along Part I 21 upwardly extending with the side that the first first type surface intersects, and from the side contrary with the side being connected to main part 1 of Part I 21 towards the Part II 22 of the middle part of main part 1 extension, Part II 22 is spaced with main part 1 and least partially overlapped with main part 1 on the thickness direction of main part.The part of the close extension 2 of main part 1 is provided with engraved structure 3.With continued reference to Fig. 1, the Part II 22 of extension 2 such as with the first major surfaces in parallel, Part I 21 is such as vertical with the first first type surface.Such as, the bearing of trend of engraved structure 3 can be identical with the bearing of trend of extension 2 Part I 21.
It should be noted that the shape of this extension and size are not particularly limited, can select according to actual needs.The generation type of this extension can be such as backboard edge is once bent after, then carry out twice bended and form.Such as, this extension can also be one-body molded by mould.Such as, this backboard can also be that substantially planar main part is fixedly secured to one another with independent extension and forms.Additionally, extension is also not necessarily required to be that one edge of backboard bends completely, it is also possible to be part bending.Structure and the generation type of extension are not specially limited by this utility model.In general, according to the specific field of backboard application, extension is arranged at the edge of backboard.Concrete, for the backboard of a kind of essentially rectangular structure, only extension is set in one lateral edge.
It addition, main part is provided with engraved structure near the part of extension.The effect of this engraved structure e.g. lamp bar is after the back side of backboard is fixing, and the LED chip on lamp bar can be arranged faced by the incidence surface of the light guide plate arranged in backboard front through exiting surface after this engraved structure.The front of backboard refers to arrange the side of light guide plate.The engraved structure of embodiment the most of the present utility model needs to ensure that the LED chip on lamp bar can pass engraved structure.Such as, this engraved structure can be least partially overlapped with extension or do not overlap each other on back plate main body portion thickness direction.
In one embodiment, such as, described Part I is vertical with described first first type surface, described Part II and described first major surfaces in parallel.
In one embodiment, described engraved structure is parallel to described first edge and extends, the part along described first edge of described main part includes ledge structure, described ledge structure includes the connecting portion at the first edge of kink that the Part II towards described extension bends and the edge of close described Part II connecting described kink and described main part, and described engraved structure is positioned at the part of the close described kink of described kink and described connecting portion.
With reference to Fig. 2, backboard include main part 1 and with the extension 2 being arranged at 1 one edges of main part.This extension 2 such as has structure as above.With continued reference to Fig. 2, the Part I 21 of extension 2 (direction shown in arrow in figure) in the first direction extends.Such as, extension 2 can be that an edge of backboard bends form completely.The part of the close extension 2 of main part 1 is provided with engraved structure 3, and this engraved structure 3 is such as coordinating with LED lamp bar.Engraved structure 3 is parallel to main part the first edge 11 and extends (i.e. in Fig. 2 direction) indicated by arrow.The part along the first edge 11 of main part 1 includes ledge structure, ledge structure includes the edge of the kink 12 of Part II 22 bending towards described extension 2 and the close Part II 22 of connecting bending folding part 12 and the connecting portion 13 (only illustrating a part for ledge structure in figure) at the first edge 11 of main part 1, and engraved structure 3 is positioned at the part of the close described kink 12 of kink 12 and described connecting portion 13.By arranging step so that after lamp bar is installed, the surface being provided with LED chip flushes near the surface of backboard the first first type surface with light guide plate, to make full use of light efficiency.The backboard of this set ledge structure can also make back light unit more slimming.
In this embodiment, described backboard includes the part of non-hollow out respectively in the both sides of the bearing of trend of described engraved structure.
In the above-described embodiments, the length of engraved structure matches with lamp bar length, is greater than or is equal to the length of lamp bar, so that lamp bar is mountable to position, it is ensured that the light efficiency of LED chip.
In one embodiment, the kink of described ledge structure along the size of the thickness direction of described main part in the range of 0.1mm to 0.3mm.This size is such as equal with the thickness of lamp bar substrate.With guarantee lamp bar after the backboard back side is installed, the back side of lamp bar substrate flushes with second first type surface in back plate main body portion, makes the more slimming of whole back light unit.Meanwhile, lamp bar substrate front surface and bottom surface of light guide plate (near the surface of the first first type surface of backboard) are in approximately the same plane, and then the light that sent of the exiting surface of LED can enter into the incidence surface of light guide plate more fully, improves light efficiency.
In one embodiment, engraved structure and extension are least partially overlapped on the thickness direction in back plate main body portion.By limiting the position relationship of engraved structure and extension, the structure that can make back light unit is compacter.
In one embodiment, see in being parallel to the plane graph of the first first type surface of described main part, described engraved structure includes the strip structure extended along the first edge of described main part, and and edge prominent to described first edge from described strip structure is parallel to the spaced multiple prominent structures in direction at described first edge.Fig. 3 this utility model embodiment main part is provided with the schematic top plan view of engraved structure.With reference to Fig. 3, main part 1 (shadow region) is provided with engraved structure 3 (white portion).Engraved structure 3 includes that the strip structure 21 extended along the first edge 11 and and edge prominent to the first edge 11 from strip structure 31 are parallel to the spaced multiple prominent structures 32 in direction at described first edge 11.Engraved structure is arranged multiple projection, on the one hand can improve the positioning precision to LED；On the other hand, it is also possible to play protection LED chip and improve the effects such as lamp bar installation strength on backboard.
With reference to Fig. 3, the above-mentioned prominent structure 32 size h on the bearing of trend being perpendicular to the first edge 11 and engraved structure 3 near the side at the first edge 11 and meet d/2≤h≤3d/4 away from distance d between the side at the first edge.Such as, h meets 0.8mm≤h≤1.3mm.The prominent structure 32 size on the bearing of trend being perpendicular to the first edge 11 is referred to reference to Fig. 3, h.If h is too small, then cannot effectively protect LED chip.Its reason is that the major part of LED chip is exposed at outside prominent structure 32, and when assembling backlight unit, light guide plate or other optics may extrude these LED chip, thus cause the damage of LED chip.On the other hand, h can not be excessive, the distance between LED chip light extraction face and light guide plate incidence surface otherwise can be caused excessive, affect the utilization rate of light.By adjusting h value, can be while effectively protection LED chip, the light making LED chip send as far as possible enters into the incidence surface of light guide plate.
Such as, described prominent structure is along being parallel to the size at described first edge in the range of 3.2mm to 4.4mm.With reference to Fig. 3, this size W meets 3.2mm≤W≤4.4mm.On the one hand, if W is excessive, then effectively protection and the effect of location LED chip can not be played；On the other hand, if W is too small, then can cause LED chip installation difficulty, or damage LED chip.By adjusting W value, can be while convenient installation, effectively protection and location LED chip.
In one embodiment, engraved structure 3 such as can be more than the prominent structure 32 size on the bearing of trend being perpendicular to the first edge 11 away from the first edge 11 and the distance between the first edge 11.I.e. highlight structure 32 and leave a certain distance to engraved structure 3 away from the first side, edge 11, to expose the part surface of light guide plate in the second main surface side of backboard by engraved structure 3.Thus when lamp bar is pasted from backboard opposite side, the LED chip side that is provided with of lamp bar can be with this part surface laminating of light guide plate.That is, on the width of lamp bar, lamp bar is positioned at the part of LED chip both sides and is pasted on backboard and light guide plate the most respectively near backboard the first main surface side and the part surface that exposed by engraved structure, thus improves the fixing intensity of lamp bar, and makes full use of the light that LED chip sends.
In one embodiment, the sidewall around described engraved structure of described main part is coated with insulating barrier.LED chip is to be welded in such as printed circuit board (PCB) by welding manner, it is thus possible to leave part leg.If these legs contact backboard, then it may happen that short circuit, LED chip is made normally to work.For example, it is possible to inwall (i.e. at the surface configuration insulating barrier of whole engraved structure) and printed circuit board (PCB) around engraved structure arrange a layer insulating with backboard contact portion in back plate main body portion.Such as, the material of this insulating barrier can be plastics or rubber, or other has the material of insulating effect.Such as, when using plastics as insulating barrier, the correspondence position of backboard can be moulded in by mold insert injection molding technology.When using rubber as insulant, it is also possible to when back light unit is by external force, plays cushioning effect, thus ensure that leg will not snap, it is to avoid LED chip suffers damage.The method to set up arranging position and insulating layer material of insulating barrier can determine according to actual needs, and this is not especially limited by this utility model.
Another aspect of the disclosure provides a kind of back light unit including above-mentioned backboard, the Part I of the extension of described backboard extends along from described second first type surface to the direction of described first first type surface, described back light unit also includes: LED lamp bar, it is arranged at the second main surface side of described main part, and includes strip-form base and the spaced multiple LED chip of bearing of trend along described strip-form base；Light guide plate, is arranged at the first main surface side of the main part of described backboard, and wherein, the LED chip of described LED lamp bar passes described engraved structure, and the exiting surface of described LED chip is in the face of the incidence surface of described light guide plate.By backboard is arranged engraved structure near the part of extension, and LED lamp bar is arranged from backboard opposite side, lamp bar can be accurately positioned easily, it is to avoid the flexural deformation of lamp bar, it is ensured that the light efficiency of light source.
It is pointed out that extending part is in the first main surface side.It is to say, the side of the Part I of extension is intersected with the first first type surface, another is laterally away from the first first type surface and the second first type surface direction extends, and Part II and the first first type surface relative spacing are arranged.
It should be noted that back light unit can also include other component, such as, reflector plate, diffusion sheet, brightness enhancement film etc., those skilled in the art must not be restricted explanation to this utility model.This edge has the backboard of extension and such as can apply to notebook computer, panel computer etc..
It addition, as it has been described above, the Part I of extension is such as vertical with the first first type surface, Part II such as with the first major surfaces in parallel.
Fig. 4 a is the schematic perspective view of this utility model embodiment back light unit structure；Fig. 4 b is the schematic perspective view of the Facad structure of this utility model embodiment back light unit；Fig. 4 c is the cross-sectional schematic of the back light unit of this utility model embodiment.With reference to Fig. 4 a-Fig. 4 c, back light unit includes backboard, LED lamp bar 4 and is arranged at the light guide plate 5 of backboard the first main surface side；The edge of backboard is provided with extension 2, and the part of the close extension 2 of backboard is provided with engraved structure 3；Described LED lamp bar 4 is arranged from the second main surface side of backboard, and LED chip 41 is through engraved structure 3；In the first main surface side of backboard, the exiting surface of LED chip 41 is arranged in the face of the incidence surface of light guide plate 5.
Below in conjunction with Fig. 4 a to Fig. 4 c, the back light unit concrete structure of this utility model embodiment is described in detail.
Fig. 4 a is the structure axonometric chart of back light unit.With reference to Fig. 4 a, backboard includes the extension being arranged at its edge and the main part 1 being connected with described extension；The part of the close extension 2 of backboard is provided with engraved structure 3.Such as, as it has been described above, engraved structure 3 includes the strip structure 31 extended along the first edge 11 of main part 1 and prominent to the first edge 11 from described strip structure 31 and edge is parallel to the spaced multiple prominent structures 32 in direction at described first edge 11.LED chip on lamp bar 4 is embedded into prominent structure 32 from the second main surface side of backboard and (illustrate only a part for lamp bar in figure).Additionally, as it can be seen, lamp bar 4 is positioned at the part of LED chip both sides in the width direction such as can be respectively adhered on backboard the second main surface side and the part surface of light guide plate that exposes from engraved structure 3, thus improve the fixed effect of lamp bar.
In one embodiment, such as, described engraved structure is parallel to described first edge and extends, the part along described first edge of described main part includes ledge structure, described ledge structure includes kink that the Part II towards described extension bends and the edge of close described Part II connecting described kink and the connecting portion at described first edge, and described engraved structure is positioned at described kink and the described connecting portion part near described kink.
Fig. 4 b is the axonometric chart of the Facad structure of this utility model embodiment back light unit.With reference to Fig. 4 b, engraved structure 3 arranges near extension and is parallel to main part the first edge and extends, the part along the first edge of main part includes ledge structure, this ledge structure includes the kink of the Part II bending towards extension and the edge of the close Part II of connecting bending folding part and the connecting portion at the first edge, and engraved structure is positioned at kink and the connecting portion part near kink.By setting table stage structure, lamp bar can be made to fit tightly near the surface of backboard the first main surface side with light guide plate, so that it is guaranteed that the light that the exiting surface of LED is sent sufficiently enters into the incidence surface of light guide plate.Relevant ledge structure and engraved structure, the accompanying drawing before can refer to and description.
With continued reference to Fig. 4 b, light guide plate 5 is arranged at first main surface side (being diagrammatically only by out a part for back light unit in figure, to illustrate the engraved structure of backboard) of backboard.Light guide plate 5 and LED lamp bar are installed after putting in place, and the exiting surface of light guide plate 5 is facing with each other with the exiting surface of the LED chip on the lamp bar 4 that backboard the second main surface side is arranged.
In this embodiment, such as, the kink of step size on main part thickness direction is identical with the thickness of the matrix of described LED lamp bar.With continued reference to Fig. 3, such as, the kink of step size on main part thickness direction can be identical with the thickness of lamp bar 4, so, one surface of the matrix of LED lamp bar 4 can flush with the second main surface side surface of backboard, so that back light unit more slimming；Simultaneously, another surface of the matrix of LED lamp bar 4 and light guide plate 5 are in approximately the same plane near the surface of backboard the first first type surface, and then guarantee that the light that the exiting surface of the LED chip on lamp bar 4 is sent sufficiently enters into the incidence surface of light guide plate 5, improve the display brightness of display device.
In one embodiment, the matrix (being provided with the side of LED chip) of lamp bar is positioned at the part of LED chip both sides in the width direction and can fix with backboard opposite side surface and the part surface of light guide plate that exposes from engraved structure respectively.Such as, fixed form can be to cohere each other, it is also possible to is to use screw or alternate manner.Thus make full use of the light that LED chip sends, and make structure of backlight unit compact, it is achieved the slimming of back light unit.
In one embodiment, on the thickness direction of described backboard, described engraved structure is least partially overlapped with described extension.Such as, LED chip is arranged at the side near the first edge of engraved structure, and such LED and extension Part II are least partially overlapped on back plate thickness direction, so that the structure of back light unit is compacter.
In one embodiment, see in being parallel to the plane graph of the first first type surface of described main part, described engraved structure includes the strip structure extended along the first edge of described main part, and prominent to described first edge from described strip structure and along be parallel to described first edge the spaced multiple prominent structures in direction (can in conjunction with before accompanying drawing and description), at least partially embedded described prominent structure of LED chip in described LED lamp bar.As shown in Figs. 4a and 4b, the LED chip that lamp bar 4 is arranged matches with prominent structure 31, i.e. at least partially embedded described prominent structure 31 of the LED chip on lamp bar 4.As previously mentioned, on the one hand, engraved structure includes above-mentioned prominent structure, can be accurately positioned LED chip；On the other hand, it is also possible to LED chip is played a protective role.Such as it is possible to prevent back light unit when being extruded by external force, damages LED.
About the relative dimensions of prominent structure, the description before can refer to.
In one embodiment, see in being parallel to the plane graph of the first first type surface of described main part, engraved structure includes the strip structure extended along the first edge of main part, and and edge prominent to the first edge from strip structure is parallel to the spaced multiple prominent structures in direction at the first edge.The substrate (being provided with the side of LED chip) of LED lamp bar is positioned at the part of LED chip both sides fixing near the first first type surface and the part surface that exposed by described engraved structure by backboard the second main surface side and light guide plate respectively on the width of substrate.Such as, fixed form can be to cohere each other, it would however also be possible to employ screw or alternate manner.Fig. 4 c is the cross-sectional schematic of the back light unit of this utility model embodiment, and its slice location is as shown by the arrow in figure 4b.With reference to Fig. 4 c, back light unit includes backboard, LED lamp bar 4 and light guide plate 5.LED chip 41 it is provided with in LED lamp bar.LED lamp bar 4 is positioned at the side of LED chip in the width direction and is pasted on the second first type surface of backboard by adhesive tape 9, and opposite side passes through close backboard the first first type surface that adhesive tape 9 is pasted on light guide plate 5 and the part surface exposed by engraved structure.The side being provided with LED chip of above-mentioned substrate and the part between adjacent LED chip such as can also pass through the such as adhesive tape sticking the second main surface side at backboard, to improve fixed effect further.Lamp bar is positioned at the part of LED chip both sides in the width direction and is respectively adhered on backboard and light guide plate, can improve the fixed effect of lamp bar, prevent because of lamp bar be distorted deformation and affect light efficiency.
With continued reference to Fig. 4 c, lamp bar 4 is after backboard the second main surface side is arranged, and LED chip passes engraved structure and the setting facing with each other with the incidence surface of light guide plate 5.Such as, certain interval (not shown) is left between incidence surface and the incidence surface of LED chip 41 of light guide plate 5, so that LED can effectively dispel the heat.Meanwhile, there is certain interval between Part I and Part II and the LED of extension.Also illustrating reflector plate 6 in figure, it is arranged between light guide plate 5 and extension 2.Further, it is also possible at light guide plate, the blooming piece such as diffusion sheet, brightness enhancement film is set away from backboard side.
It should be noted that the sidewall around described engraved structure of main part such as can be coated with insulating layer coating.For example, it is also possible to the part contacted with backboard at lamp bar is respectively provided with insulant.As it was noted above, such as this insulant can be plastics or rubber.It is for instance possible to use mold insert injection molding technology by plastics or rubber injection mold to desired location.By arranging insulant, the leg of the LED chip of lamp bar can be avoided to come in contact with backboard and cause short circuit, it is ensured that the reliably working of back light unit.Meanwhile, if the insulant arranged is flexible material, such as flexiplast or rubber, it is also possible to further function as protection LED chip and the effect of LED lamp bar, it is to avoid back light unit, when being extruded by external force, causes the infringement of lamp bar.
Another aspect of the present utility model provides a kind of display device, including back light unit described above.
Another aspect of the present utility model provides the assemble method of a kind of back light unit including backboard that this utility model embodiment provides, including:
Light guide plate and LED lamp bar are provided；
Described light guide plate is arranged at the first main surface side of described backboard so that the incidence surface of described light guide plate is arranged between the Part II of described extension and described main part,
Described LED lamp bar is arranged at the second main surface side of the main part of described backboard, and by the LED chip of described lamp bar through described engraved structure, so that the exiting surface of described LED chip is facing with each other with the incidence surface of described light guide plate.
Fig. 5 a-Fig. 5 d is the back light unit assemble method of this utility model embodiment.The assemble method of back light unit such as comprises the steps: with reference to Fig. 5 a, it is provided that have the backboard of extension, and near the part of extension, backboard is set to engraved structure, the back board structure that i.e. this utility model embodiment provides.As it has been described above, such as, this engraved structure includes the strip structure extended along the first edge of main part, and and edge prominent to the first edge from strip structure is parallel to the spaced multiple prominent structures in direction at the first edge.The setting of extension can be such as that the backboard of substantially planar structure is carried out twice bended, such as, can also be to have the backboard of one-body molded or planar structure by film to be fixedly secured to one another with U folded structure and form.Engraved structure e.g. obtains by the way of machining, such as, cut, dig methods such as washing.With continued reference to Fig. 5 a, such as, as mentioned above, the main part part near the first edge can also be set to ledge structure, the i.e. part along the first edge of main part includes ledge structure, ledge structure includes the kink of the Part II bending towards extension and the edge of the close Part II of connecting bending folding part and the connecting portion at the first edge, and engraved structure is positioned at kink and the connecting portion part near described kink.Such as, the kink of ledge structure size on main part thickness direction can be such as identical with the thickness of lamp bar.Such as, ledge structure, engraved structure and extension can mate preparation.Such as, first the edge of one piece of metallic plate with planar structure is bent to form extension；Subsequently, make twice bending of backboard in the position of the distance extension certain distance of backboard, to form the step substantially parallel with extension；Finally, make backboard from the centre position of its step near extension side hollow out, it is thus achieved that required back board structure.
With reference to Fig. 5 b, LED chip 41 is e.g. welded in lamp bar 4 by the way of welding.With reference to Fig. 5 c, from second main surface side (with the opposition side, side being provided with light guide plate) of backboard, lamp bar 4 being pasted on backboard, what LED chip was corresponding is mounted in each prominent structure of engraved structure.
With reference to Fig. 5 d, light guide plate is arranged at the first main surface side of backboard, and the exiting surface of light guide plate is positioned opposite to each other with the incidence surface of LED chip.
It should be noted that the step shown in Fig. 5 c and Fig. 5 d, i.e. lamp bar stick and the order of the setting of light guide plate does not do specific requirement, can select voluntarily according to practical situation.As long as exiting surface is facing with each other with the incidence surface of the light guide plate of backboard the first main surface side setting after the LED chip ensured on lamp bar passes engraved structure.It addition, the deformation such as variously-shaped, the size about backboard and back light unit described previously and the combination of various deformation, the assemble method of this back light unit all can use, and similar technique effect can be produced, with reference to description before.
After completing above-mentioned light guide plate, the arranging of LED lamp bar, it is also possible to reflector plate, diffusion sheet and brightness enhancement film etc. are set further.
In one embodiment, the substrate making described LED lamp bar is positioned at the part of LED chip both sides on base widths direction and is adhered to the second first type surface of backboard and close described first first type surface of light guide plate the most respectively and exposes the part surface of engraved structure.It is pasted on backboard the second first type surface and the part surface of light guide plate respectively by the both sides making the substrate of lamp bar be positioned at LED chip in the direction of the width, the stability that lamp bar sticks can be improved, it is to avoid lamp bar is distorted deformation when by external force.
In one embodiment, the method arranging light guide plate in described backboard the first side is: the first main surface side at described backboard arranges location line, the installation of described light guide plate is put in place according to described location line.By arranging location line, convenient accurately light guide plate can be installed and put in place, improve packaging efficiency.
The method of described light guide plate is fixed for example: be bonded to each other by first first type surface away from extension side with backboard of light guide plate in described backboard the first main surface side；The fixing means of LED lamp bar is for example, pasted on the second first type surface of such as backboard by two-sided tape.
In this article, the such as term such as " first ", " second " is used merely to separate an entity or operation with another entity or operating space, and there is any relation or order between not requiring or imply these entities or operating.Term " includes ", " comprising " these be expressed as open, it is not excluded that included process, method, article, there is also other key elements.It can further be stated that, on " ", the orientation of the instruction such as D score or position relationship be based on orientation shown in the drawings or position relationship, it is for only for ease of description this utility model and simplifies description, rather than instruction or the device of hint indication or element must have specific orientation, with specific azimuth configuration and operation, therefore it is not intended that to restriction of the present utility model.Unless otherwise clearly defined and limited, term " is installed ", " being connected ", " connection " should be interpreted broadly, and connects for example, it may be fixing, it is also possible to be to removably connect, or be integrally connected；Can be to be mechanically connected, it is also possible to be electrical connection；Can be to be joined directly together, it is also possible to be indirectly connected to by intermediary, can be the connection of two element internals.For the ordinary skill in the art, above-mentioned term concrete meaning in this utility model can be understood as the case may be.
The above is only exemplary embodiment of the present utility model, and not for limiting protection domain of the present utility model, protection domain of the present utility model is determined by appended claim.
Claims (22)
1. a backboard, including:
Having the main part of platy structure, described main part includes the first first type surface relative to each other and
Two first type surfaces；
Extension, described extension includes the first edge, edge from described main part and described first first type surface
Intersect the upwardly extending Part I in side, and from described Part I be connected to described main part
The Part II that extends towards the middle part of described main part of contrary side, side, described Part II with
Described main part is spaced and least partially overlapped on the thickness direction of described main part；
It is characterized in that, the part of the close described extension of described main part is provided with engraved structure.
Backboard the most according to claim 1, it is characterised in that described Part I and described the
One first type surface is vertical, described Part II and described first major surfaces in parallel.
Backboard the most according to claim 2, it is characterised in that described engraved structure is along being parallel to
The direction at described first edge extends, and the part at close described first edge of described main part includes step
Structure, described ledge structure includes kink and the connection of the Part II bending towards described extension
The edge of the close described Part II of described kink and the connecting portion at the first edge of described main part,
Described engraved structure is positioned at the part of the close described kink of described kink and described connecting portion.
Backboard the most according to claim 3, it is characterised in that described backboard is tied in described hollow out
The both sides of the bearing of trend of structure include the part of non-hollow out respectively.
Backboard the most according to claim 4, it is characterised in that the kink of described ledge structure
Along the size of thickness direction of described main part in the range of 0.1mm to 0.3mm.
Backboard the most according to claim 1, it is characterised in that on main part thickness direction,
Described engraved structure is least partially overlapped with the described Part II of described extension.
7. according to the backboard described in claim 1-6 any one, it is characterised in that being parallel to
Seeing in the plane graph of the first first type surface stating main part, described engraved structure includes along described main part
The strip structure that one edge extends, and prominent to described first edge from described strip structure and along parallel
The spaced multiple prominent structures in direction in described first edge.
Backboard the most according to claim 7, it is characterised in that described prominent structure is being perpendicular to
Size on the direction at described first edge is in the range of 0.8mm to 1.3mm.
Backboard the most according to claim 8, it is characterised in that described prominent structure is along parallel
Size on the direction at described first edge is in the range of 3.2mm to 4.4mm.
Backboard the most according to claim 7, it is characterised in that described prominent structure is rectangle shape
Shape.
11. backboards according to claim 7, it is characterised in that described main part around described
The sidewall of engraved structure is coated with insulating barrier.
12. backboards according to claim 11, it is characterised in that the material of described insulating barrier is
Plastics or rubber.
13. 1 kinds include the back light unit of backboard as described in any one of claim 1-12, and its feature exists
In, the extension of described backboard Part I along from described second first type surface to described first first type surface
Direction extends, and described back light unit also includes:
LED lamp bar, is arranged at the second main surface side of described main part, and includes strip-form base and edge
The spaced multiple LED chip of bearing of trend of described strip-form base；
Light guide plate, is arranged at the first main surface side of the main part of described backboard,
It is characterized in that, the LED chip of described LED lamp bar passes described engraved structure, and described LED
The exiting surface of chip is in the face of the incidence surface of described light guide plate.
14. back light units according to claim 13, it is characterised in that described engraved structure is put down
Row extends in described first edge, and the part at close described first edge of described main part includes Step-edge Junction
Structure, described ledge structure includes the kink of the Part II bending towards described extension and connects institute
Stating the edge of the close described Part II of kink and the connecting portion at described first edge, described hollow out is tied
Structure is positioned at described kink and the described connecting portion part near described kink.
15. back light units according to claim 14, it is characterised in that described ledge structure
Kink is identical with the thickness of described LED lamp bar along the size of the thickness direction of described main part.
16. back light units according to claim 14, it is characterised in that described engraved structure
Length is more than or equal to the length of described LED lamp bar.
17. back light units according to claim 13, it is characterised in that in the thickness of described backboard
On degree direction, described engraved structure is least partially overlapped with described extension.
18. according to the back light unit described in claim 13-17 any one, it is characterised in that flat
Row is seen in the plane graph of the first first type surface of described main part, and described engraved structure includes along described main body
Portion first edge extend strip structure, and prominent to described first edge from described strip structure and
Edge is parallel to the spaced multiple prominent structures in direction at described first edge, in described LED lamp bar
At least partially embedded described prominent structure of LED chip in.
19. back light units according to claim 18, it is characterised in that described prominent structure exists
It is perpendicular to the size on the direction at described first edge in the range of 0.8mm to 1.3mm.
20. back light units according to claim 19, it is characterised in that described prominent structure edge
It is parallel to the size on the direction at described first edge in the range of 3.2mm to 4.4mm.
21. back light units according to claim 18, it is characterised in that described substrate is wide at it
Be positioned on degree direction the part of LED both sides respectively with described second main surface side and the institute of described backboard
Close described first main surface side stating light guide plate and the part surface exposed by described engraved structure are consolidated
Fixed.
22. 1 kinds include the display device of back light unit as described in any one of claim 13-21.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620383758.2U CN205640523U (en) | 2016-04-27 | 2016-04-27 | Backplate, Backlight unit and display device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620383758.2U CN205640523U (en) | 2016-04-27 | 2016-04-27 | Backplate, Backlight unit and display device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205640523U true CN205640523U (en) | 2016-10-12 |
Family
ID=57061192
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620383758.2U Withdrawn - After Issue CN205640523U (en) | 2016-04-27 | 2016-04-27 | Backplate, Backlight unit and display device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205640523U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105782820A (en) * | 2016-04-27 | 2016-07-20 | 合肥京东方显示光源有限公司 | Backboard, backlight unit, display device and assembling method of backlight unit |
-
2016
- 2016-04-27 CN CN201620383758.2U patent/CN205640523U/en not_active Withdrawn - After Issue
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105782820A (en) * | 2016-04-27 | 2016-07-20 | 合肥京东方显示光源有限公司 | Backboard, backlight unit, display device and assembling method of backlight unit |
| WO2017185845A1 (en) * | 2016-04-27 | 2017-11-02 | 京东方科技集团股份有限公司 | Back panel, backlight unit, display device and assembling method for backlight unit |
| CN105782820B (en) * | 2016-04-27 | 2018-07-27 | 合肥京东方显示光源有限公司 | The assemble method of backboard, back light unit, display device and back light unit |
| US10506673B2 (en) | 2016-04-27 | 2019-12-10 | Boe Technology Group Co., Ltd. | Back plate, backlight module, display device, and assembly method of backlight module |
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| C14 | Grant of patent or utility model | ||
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| AV01 | Patent right actively abandoned |
Granted publication date: 20161012 Effective date of abandoning: 20180727 |
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| AV01 | Patent right actively abandoned |