CN111965902B - Backlight module, display device and electronic equipment - Google Patents
Backlight module, display device and electronic equipment Download PDFInfo
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- CN111965902B CN111965902B CN202010985224.8A CN202010985224A CN111965902B CN 111965902 B CN111965902 B CN 111965902B CN 202010985224 A CN202010985224 A CN 202010985224A CN 111965902 B CN111965902 B CN 111965902B
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- optical film
- guide plate
- light guide
- groove
- backlight module
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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
- G02F1/133615—Edge-illuminating devices, i.e. illuminating from the side
Abstract
The application discloses a backlight module, a display device and an electronic device, wherein the backlight module comprises a light guide plate and an optical film group, the light guide plate comprises at least one groove, the optical film group comprises at least one optical film layer, at least one side edge of at least one optical film layer in the optical film group extends to form an extension part which is in one-to-one correspondence with the at least one first groove, the extending part is fixed with the surface of the first groove corresponding to the extending part after being bent along a bending line in the optical film layer, namely, the extension part of at least one optical film layer in the optical film group is fixed with the first groove on the side wall of the light guide plate, so that the area of the light guide plate close to one side of the optical film layer is not required to be occupied, the area of the frame region of the backlight module is favorably reduced, and the display effect of a narrow frame is favorably realized.
Description
Technical Field
The application relates to the technical field of display, in particular to a backlight module, a display device and electronic equipment.
Background
The backlight module is an important component of a passive light-emitting display module (such as a liquid crystal display module) and is used for providing a light source to assist a passive light-emitting element to display.
Backlight unit's major component part includes the light guide plate, the light source with be used for optimizing light outgoing angle, at least one deck optics rete of luminance isoparametric, these optics rete need be fixed on the light guide plate with modes such as bonding usually, in order to guarantee backlight unit holistic reliability, but also just because the bonding region of optics rete needs to occupy the region that certain light guide plate is close to optics rete one side, lead to backlight unit to reserve certain frame for the bonding region of these optics rete, lead to that the "frame" region that is not used for showing among the backlight unit is great, be unfavorable for realizing the display effect of "narrow frame".
Disclosure of Invention
In order to solve the technical problem, the application provides a backlight module, a display device and an electronic device, so as to reduce the area of a frame region of the backlight module, and achieve the purpose of a narrow frame display effect.
In order to achieve the technical purpose, the embodiment of the application provides the following technical scheme:
a backlight module includes: an optical film group and a light guide plate, wherein,
the light guide plate comprises at least one first groove, and the first groove extends from the side surface of the light guide plate to the inside of the light guide plate;
the optical film group comprises at least one optical film layer, at least one side edge of at least one optical film layer in the optical film group extends to form an extending part which is in one-to-one correspondence with the at least one first groove, and the extending part is bent along a bending line in the optical film layer and then fixed on the surface of the first groove corresponding to the extending part.
A display device, comprising: the backlight module comprises a backlight module and a display panel;
the backlight module is any one of the backlight modules.
An electronic device, comprising: a backlight module as claimed in any preceding claim.
It can be seen from the above technical solutions that, the embodiment of the present application provides a backlight module, a display device and an electronic device, where the backlight module includes a light guide plate and an optical film group, the light guide plate includes at least one groove, the optical film group includes at least one optical film layer, at least one side edge of at least one optical film layer in the optical film group extends to form an extension portion corresponding to the at least one first groove, the extension portion is bent along a bending line in the optical film layer and then fixed to a surface of the first groove corresponding to the extension portion, that is, the extension portion of at least one optical film layer in the optical film group is fixed to the first groove on the sidewall of the light guide plate, and it is not necessary to occupy a region on a side of the light guide plate close to the optical film layer, which is beneficial to reducing the area of the frame region of the backlight module, thereby being beneficial to realizing the display effect of the narrow frame.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly introduced below, it is obvious that the drawings in the following description are only embodiments of the present application, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.
FIG. 1 is a schematic top view of a backlight module in the prior art;
FIG. 2 is a schematic cross-sectional view taken along line AA' of FIG. 1;
fig. 3 is a schematic top view illustrating a light guide plate according to an embodiment of the present disclosure;
FIG. 4 is a schematic diagram illustrating a top view structure of an optical film according to an embodiment of the present disclosure;
fig. 5 is a schematic top view illustrating a backlight module according to an embodiment of the present disclosure;
fig. 6 is a schematic top view illustrating a light guide plate according to another embodiment of the present disclosure;
FIG. 7 is a schematic diagram illustrating a top view structure of an optical film according to another embodiment of the present disclosure;
fig. 8 is a schematic top view illustrating a backlight module according to another embodiment of the present application;
fig. 9 is a schematic cross-sectional view illustrating a backlight module according to an embodiment of the present disclosure;
FIG. 10 is a schematic top view of a light guide plate and an optical film according to an embodiment of the present disclosure;
FIG. 11 is a schematic top view of various light guide plates according to one embodiment of the present disclosure;
fig. 12 is a schematic diagram illustrating a positional relationship between a light source and a light guide plate according to an embodiment of the present disclosure;
fig. 13 is a schematic diagram illustrating a positional relationship between a light source and a light guide plate according to another embodiment of the present application;
fig. 14 is a schematic cross-sectional view of a display device according to an embodiment of the present application;
fig. 15 is a schematic structural diagram of an electronic device according to an embodiment of the present application.
Detailed Description
As described in the background art, the optical film layer of the backlight module in the prior art is usually adhered to the front surface of the light guide plate, that is, referring to fig. 1 and fig. 2, fig. 1 is a schematic top view structure of a light guide plate in the prior art, and fig. 2 is a schematic cross-sectional structure along line AA' of fig. 1, in the backlight module, the edge region of the front surface of the light guide plate 1 is provided with steps 2 for adhering the optical film layer, and the steps 2 are provided with corresponding heights H according to the hierarchical relationship of different optical film layers, for example, the height H of the step 2 corresponding to the optical film layer close to the light guide plate 1 is the lowest, and the height H of the step 2 corresponding to the optical film layer farther from the light guide plate 1 is higher, so as to facilitate the adhesion of the optical film layer corresponding to the step 2.
In order to guarantee the bonding fastness of optics rete and step 2, generally require that the width W of step 2 is at least at 2 ~ 3mm, and the region that step 2 occupied can't be used for even light, therefore backlight unit need remain great frame to hold and shelter from the adhesive linkage of rete, can't realize narrow frame.
In view of this, an embodiment of the present application provides a backlight module, including: an optical film group and a light guide plate, wherein,
the light guide plate comprises at least one first groove, and the first groove extends from the side surface of the light guide plate to the inside of the light guide plate;
the optical film group comprises at least one optical film layer, at least one side edge of at least one optical film layer in the optical film group extends to form an extension part which is in one-to-one correspondence with the at least one first groove, and the extension part is bent along a bending line in the light guide plate and fixed on the surface of the first groove corresponding to the extension part.
The extending part of at least one optical film layer in the optical film group is fixed with the first groove on the side wall of the light guide plate, the area of the light guide plate close to one side of the optical film layer is not required to be occupied, the area of a frame area of the backlight module is favorably reduced, and therefore the display effect of a narrow frame is favorably realized.
The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, 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 application.
An embodiment of the present application provides a backlight module, referring to fig. 3 and fig. 4, where fig. 3 is a schematic top view structure diagram of a light guide plate 10 provided in an embodiment of the present application, fig. 4 is a schematic top view structure diagram of an optical film layer provided in an embodiment of the present application, specifically, a schematic top view structure diagram of an optical film layer 20 including an extension portion 21 in an optical film group, fig. 5 is a schematic top view diagram of a backlight module provided in an embodiment of the present application, specifically, a schematic top view diagram of the optical film layer 20 shown in fig. 4 and the light guide plate 10 shown in fig. 3 after being fixed, the backlight module includes: an optical film group and a light guide plate 10, wherein,
the light guide plate 10 includes at least one first groove 11, and the first groove 11 extends from a side surface of the light guide plate 10 toward an inside of the light guide plate 10.
The optical film group comprises at least one optical film layer 20, at least one side edge of at least one optical film layer 20 in the optical film group extends to form an extension portion 21 corresponding to the at least one first groove 11 one by one, and after the extension portion 21 is bent along a bending line 211 in the optical film layer 20, the extension portion is fixed on the surface of the first groove 11 corresponding to the extension portion 21.
In fig. 3-5, the light guide plate 10 includes a first groove 11, and an extending portion 21 corresponding to the at least one first groove 11 extends from one side edge of one optical film layer 20 in the optical film group. In other embodiments of the present disclosure, the light guide plate 10 may further include two or more first grooves 11, two or more optical film layers 20 may be included in the optical film group, and at least one side edge of the two or more optical film layers 20 in the optical film group extends with an extension 21 corresponding to the at least one first groove 11. For example, referring to fig. 6 and fig. 7, fig. 6 is a schematic top-view structure diagram of a light guide plate 10 provided in an embodiment of the present application, and fig. 7 is a schematic top-view structure diagram of an optical film layer provided in another embodiment of the present application, specifically, a schematic top-view structure diagram of two optical film layers 20 in an optical film group. The light guide plate 10 shown in fig. 6 includes two first grooves 11, the two first grooves 11 respectively correspond to the extension portions 21 of the two optical film layers 20 shown in fig. 7, the optical film layer 20 on the side of the first direction DR1 is the optical film layer 20 close to the light guide plate 10, and the optical film layer 20 on the side away from the first direction R1 is the optical film layer 20 far away from the light guide plate 10 relative to the optical film layer 20 on the side of the first direction R1. Because the positions of the different first grooves 11 in the light guide plate 10 are different, the positions of the extending portions 21 on the different optical film layers 20 are also different from each other, so as to avoid mutual influence in the bending process, and the different positions of the different first grooves 11 can reduce the depth of the same first groove, thereby avoiding great adverse effect of a single first groove on the performance of the light guide plate. Referring to fig. 6, the depth of the first grooves 11 is denoted by reference numeral D in fig. 6, and particularly, the length of each first groove 11 penetrating into the light guide plate 10.
In other embodiments of the present application, the optical film layer 20 may further include two or more extending portions 21, and the extending portions 21 may be located on the same side of the optical film layer 20 or on different sides of the optical film layer 20, as long as they correspond to the first grooves 11 on the light guide plate 10 one to one.
In addition, as for the bending line 211 of each of the extension portions 21, still referring to fig. 7 and 4, the bending line 211 of the extension portion 21 is located inside the optical film layer 20, that is, the bending line 211 of the extension portion 21 is not flush with the side where the extension portion 21 is located, but rather, the side of the extension portion 21 parallel to the first direction DR1 is connected to the bending line 211 by cutting, so that the extension portion 21 can be bent around the bending line 211 and fixed to the surface of the first groove 11 of the light guide plate 10, since at least one side of at least one optical film layer 20 in the optical film group is extended with the extension portions 21 corresponding to the at least one first groove 11 one by one, the side of the light guide plate 10 can be fixed to the side of the light guide plate 10 by bending of the extension portions 21, without occupying the area of the light guide plate 10 on the side close to the optical film layer 20, thereby be favorable to reducing the frame area that light guide plate 10 was close to optical film layer 20 one side and reserves, on the basis of the fixed firm nature of guaranteeing optical film layer 20 and light guide plate 10, be favorable to realizing backlight unit's narrow frame.
Further, in an embodiment of the present application, at least one side edge of all the optical film layers 20 in the optical film group extends with an extension portion 21 corresponding to the at least one first groove 11 one to one, that is, all the optical film layers 20 in the optical film group are fixed to the first groove 11 on the side wall of the light guide plate 10 through the extension portion 21, so that the surface of the light guide plate 10 near the optical film layer 20 does not need to be provided with an area for bonding the extension portion 21, and a foundation is laid for further reducing the frame of the backlight module. Of course, in some embodiments of the present application, at least one side of a part of the optical film layers 20 in the optical film layer group may be extended with an extension 21 corresponding to the at least one first groove 11 one to one according to actual conditions.
As to the fixing manner of the optical film layer 20 and the surface of the first groove 11, optionally, in an embodiment of the present application, referring to fig. 8, fig. 8 is a schematic top view of the backlight module (for clarity, only the adhesive layer 30, the light guide plate 10, and the extension portion 21 of the optical film layer 20 are shown), and the backlight module further includes: and an adhesive layer 30.
The adhesive layer 30 is used for adhering and fixing the extension portion 21 and the first groove 11. The adhesive layer 30 includes, but is not limited to, a coating layer made of an adhesive such as a double-sided tape or an optical adhesive. In addition, in other embodiments of the present disclosure, the optical film layer 20 may be fixed to the surface of the first groove 11 by other methods (for example, electrostatic adsorption, etc.), which is not limited in the present disclosure.
Still referring to fig. 8, fig. 8 also shows a back plate 50 of the backlight module, and in an embodiment of the present application, the depth of the first groove 11 is equal to the sum of the thickness of the adhesive layer 30 and the thickness of the extension portion 21 corresponding to the first groove 11. Therefore, when the extension part 21 corresponding to the first groove 11 is bent and is bonded and fixed on the surface of the first groove 11 through the bonding layer 30, the bonding layer 30 and the extension part 21 just fill the first groove 11, a structure protruding out of the optical film layer 20 cannot be formed, assembly of structures such as a back plate of a backlight module and the like by the excessively protruding part is prevented, recessing of the optical film layer 20 cannot be formed, and consistency of the side edge of the optical film layer 20 is guaranteed. That is, in the structure shown in fig. 8, when the extension portion 21 is fixed on the surface of the first groove 11 by the adhesive layer 30, the distance D2 between the outer side (the side facing away from the light guide plate 10) surface of the extension portion 21 and the back plate 50 is equal to or approximately equal to the distance D1 between the side of the light guide plate 10 on the same side as the first groove 11 and the back plate 50, that is, the distance between the inner wall of the back plate 50 and the outer sides of the light guide plate 10 and the extension portion 21 is approximately the same, which is beneficial to ensuring the minimum design distance between the back plate 50 and the light guide plate 10 and the extension portion 21, and does not need to increase the minimum design distance due to the protruding extension portion 21, thereby being beneficial to ensuring the narrow bezel effect of the backlight module. In addition, the design structure shown in fig. 8 is also beneficial to maintaining the flatness of the surface of the optical film layer after being attached to the first groove 11 of the light guide plate 10, so that the situation that the extension portion 21 is pressed against the back plate 50 after being bent can be avoided.
On the basis of the foregoing embodiment, in another embodiment of the present application, referring to fig. 9 and fig. 10 in combination, fig. 9 is a schematic cross-sectional structure diagram of a backlight module provided in an embodiment of the present application, and fig. 10 is a schematic top view of a light guide plate and an optical film layer provided in an embodiment of the present application, where the optical film group includes N optical film layers 20 stacked in sequence along a light exit surface of the light guide plate 10, and N is greater than or equal to 2;
the N optical film layers 20 are numbered sequentially from 1 to N from the light emitting surface of the light guide plate 10, the optical film layer 20 with the number i further includes a plurality of types of second grooves 22, the plurality of types of second grooves 22 are numbered from i +1 to N, and the number of the second grooves 22 with the number j is the same as the number of the extending portions 21 of the optical film layer 20 with the number j; i is more than or equal to 1 and less than N, and i is more than j and less than N;
the orthographic projection of the extension part 21 of the optical film layer 20 with the number j on the light guide plate 10 covers the orthographic projection of the second groove 22 with the number j on the light guide plate 10.
In fig. 9, it is shown that the extending portions 21 of the optical film layers 20 are all in an unfolded state, and the orthographic projection of the extending portion 21 of the optical film layer 20 with the number j on the light guide plate 10 covers the orthographic projection of the second groove 22 with the number j on the light guide plate 10, which is a state when the extending portion 21 is folded and fixed with the surface of the second groove 22.
In addition, in fig. 9, it is described that the optical film set includes three optical film layers 20 as an example, in other embodiments of the present application, the optical film set may further include two optical film layers 20, four optical film layers 20, and the like, which is not exhaustive herein. The optical film layer 20 included in the optical film group may be an optical film such as a diffusion sheet, a prism sheet, or the like.
For the description of the number of the extension portions 21 of the optical film layer 20 and the first grooves 11 of the light guide plate 10, with reference to fig. 10, fig. 10 specifically shows a schematic top view structure of a light guide plate 10 (fig. 10(a)) and three optical film layers 20 numbered 1 (fig. 10(b)), 2 (fig. 10(c)), and 3 (fig. 10(d)), wherein the light guide plate 10 comprises three first grooves 11, the three first grooves 11 correspond to the extension portions 21 of the three optical film layers 20 numbered 1, 2 and 3 one by one, in fig. 10, the three optical film layers 20 numbered 1, 2, and 3 sequentially increase in thickness, accordingly, in order to ensure that the depths of the three first grooves 11 on the light guide plate 10 are sequentially matched with the thicknesses of the three optical film layers 20 numbered 1, 2 and 3, the depths of the three first grooves 11 on the light guide plate 10 are different. In fig. 10, the depth of the first groove 11 corresponding to the extension portion 21 of the optical film layer 20 numbered 1 is T1, the depth of the first groove 11 corresponding to the extension portion 21 of the optical film layer 20 numbered 2 is T2, the depth of the first groove 11 corresponding to the extension portion 21 of the optical film layer 20 numbered 3 is T3, optionally, T1 is T1+ T0, T2 is T2+ T0, T3 is T3+ T0, wherein T1 represents the thickness of the optical film layer 20 numbered 1, T0 represents the thickness of the adhesive layer 30, T2 represents the thickness of the optical film layer 20 numbered 2, T3 represents the thickness of the optical film layer 20 numbered 3, and when T1, T2 and T3 satisfy the above relationship, the extension portions 21 of the optical film layers 20 numbered 1, 2 and 3 and the corresponding first grooves 11 after being bent, the adhesive layer 20 and the side edge of the optical film layer 20 is not stuck by the fixed surface of the adhesive layer 30, avoiding hindering the assembly of other structures of the backlight module.
Still referring to fig. 10, the optical film layer 20 numbered 1 in fig. 10 includes a plurality of types of second grooves 22, and the number of each type of second grooves 22 may be one (as in fig. 10), but may also be a plurality (depending on the number of the extensions 21 included in the optical film layer 20 numbered 2 and 3). The plurality of types of second grooves 22 are numbered from 2(i +1, and i is 1) to N, and the second groove 22 numbered j corresponds to the optical film layer 20 numbered j, that is, the second groove 22 numbered 2 is used for avoiding the extension portion 21 of the optical film layer 20 numbered 2, and the second groove 22 numbered 3 is used for avoiding the extension portion 21 of the optical film layer 20 numbered 3. Similarly, in the optical film layer 20 numbered 2, the second groove 22 numbered 3 is included, and the second groove 22 numbered 3 is used for avoiding the extension 21 of the optical film layer 20 numbered 3. In addition, still referring to fig. 10, the optical film layer 20 numbered 2 blocks the second groove 22 of the optical film layer 20 numbered 1 and the extension portion 21 of the optical film layer 20 numbered 1, and the optical film layer 20 numbered 3 blocks the extension portion 21 of the optical film layer 20 numbered 2, so as to avoid generating a bright line.
Then, also in order to match the depth of the second groove 22 with j to the extension 21 of the optical film layer 20 with j, optionally, the depth of the second groove 22 with j is equal to the sum of the thickness of the adhesive layer 30 and the thickness of the optical film layer 20 with j. That is, still taking fig. 10 as an example, in optical film layer 20 numbered 1, the depth of second groove 22 numbered 2 satisfies h2 ═ t2+ t0, and the depth of second groove 22 numbered 3 satisfies h3 ═ t3+ t0, and accordingly, in optical film layer 20 numbered 2, the depth of second groove 22 numbered 3 satisfies h3 ═ t3+ t 0.
Referring to fig. 11, fig. 11 is a schematic top view of a different light guide plate provided by an embodiment of the present application, in a diagram a of fig. 11, a thickness of the optical film layer 20 numbered 1 is equal to a thickness of the optical film layer 20 numbered 2, and a thickness of the optical film layer 20 numbered 1 is greater than a thickness of the optical film layer 20 numbered 3; in diagram b of fig. 11, the thickness of the optical film layer 20 numbered 1 is smaller than that of the optical film layer 20 numbered 2, and the thickness of the optical film layer 20 numbered 2 is equal to that of the optical film layer 20 numbered 3; in the diagram c of fig. 11, the thickness of the optical film layer 20 numbered 1 is equal to the thickness of the optical film layer 20 numbered 2 and equal to the thickness of the optical film layer 20 numbered 3. When the thickness relationship of each optical film layer 20 in the optical film group is different, the depth of the first groove 11 on the light guide plate 10 also changes, as long as the relationship that the depth of the first groove 11 is equal to the sum of the thickness of the adhesive layer 30 and the thickness of the extending portion 21 corresponding to the first groove 11 can be satisfied, which is not exhaustive herein.
In fig. 3, 4, 5, 7, 9 and 10, it is exemplified that the at least one first groove 11 is located on the same side of the light guide plate 10, and the first grooves 11 located on the same side are beneficial to ensuring the flatness of other sides of the light guide plate 10 and reducing the adverse effect of the first grooves 11 on the light guide plate 10. However, in other embodiments of the present application, in order to meet the layout requirements of processing or other structures, the at least one first groove 11 may also be distributed on different sides of the light guide plate 10, which is not limited in the present application, depending on the actual situation.
Typically, the backlight module further comprises: a light source 40, the light source 40 is configured to provide emergent light, the light emitted from the light source 40 forms an entire light source 40 after being homogenized by the light guide plate 10, the backlight module may be divided into a direct type backlight module and a side type backlight module according to different arrangement positions of the light source 40, referring to fig. 12, fig. 12 is a schematic diagram of a position relationship between the light source and the light guide plate according to an embodiment of the present application, specifically, a schematic diagram of a cross-sectional structure of the direct type backlight module, where the light source 40 of the direct type backlight module is disposed below the light guide plate 10, referring to fig. 13, fig. 13 is a schematic diagram of a position relationship between the light source and the light guide plate according to another embodiment of the present application, specifically, a schematic diagram of a top view structure of the side type backlight module, and the light source 40 of the side type backlight module is disposed on at least one side of the periphery of the light guide plate 10. The light source 40 may include one or more point light sources, and may also include one or more line light sources, which are not limited in this application, as the case may be.
When the at least one first groove 11 is located on the same side surface of the light guide plate 10, in order to avoid the fixing regions of the surfaces of the extension portion 21 and the first groove 11 of the optical film layer 20 from generating adverse effects on the light of the light source 40, in an embodiment of the present application, still referring to fig. 13, the light source 40 and the at least one first groove 11 are disposed on different side surfaces of the light guide plate 10, so that the light emitted from the light source 40 does not pass through the fixing regions of the extension portion 21 and the first groove 11 before entering the light guide plate 10, and the adverse effects of the fixing regions of the extension portion 21 and the first groove 11 on the light emitted from the light source 40 can be avoided.
On the basis of the above embodiments, in an embodiment of the present application, the backlight module further includes: a back plate;
the back plate is used for accommodating the light guide plate 10 and the optical film group. The back plate may be a rubber frame or an iron frame, which is used to fix and protect the light guide plate 10 and the optical film set.
Correspondingly, an embodiment of the present application further provides a display device, as shown in fig. 14, fig. 14 is a schematic cross-sectional structure diagram of the display device, where the display device includes: a backlight module 100 and a display panel 200;
the backlight module 100 is the backlight module 100 according to any of the above embodiments.
Correspondingly, an embodiment of the present application further provides an electronic device, as shown in fig. 15, fig. 15 is a schematic structural diagram of the electronic device a100, and the electronic device a100 includes the backlight module according to any of the above embodiments.
In summary, the embodiments of the present application provide a backlight module, a display device and an electronic apparatus, wherein the backlight module comprises a light guide plate and an optical film group, the light guide plate comprises at least one groove, the optical film group comprises at least one optical film layer, and at least one side edge of at least one optical film layer in the optical film group extends to form an extension part corresponding to the at least one first groove one by one, the extending part is fixed with the surface of the first groove corresponding to the extending part after being bent along a bending line in the optical film layer, namely, the extension part of at least one optical film layer in the optical film group is fixed with the first groove on the side wall of the light guide plate, so that the area of the light guide plate close to one side of the optical film layer is not required to be occupied, the area of the frame region of the backlight module is favorably reduced, and the display effect of a narrow frame is favorably realized.
Features described in the embodiments in the present specification may be replaced with or combined with each other, each embodiment is described with a focus on differences from other embodiments, and the same and similar portions among the embodiments may be referred to each other.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the application. Thus, the present application is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (10)
1. A backlight module, comprising: an optical film group and a light guide plate, wherein,
the light guide plate comprises at least one first groove, and the first groove extends from the side surface of the light guide plate to the inside of the light guide plate;
the optical film group comprises at least one optical film layer, at least one side edge of at least one optical film layer in the optical film group extends to form an extension part which is in one-to-one correspondence with the at least one first groove, and the extension part is bent along a bending line in the optical film layer and then fixed on the surface of the first groove corresponding to the extension part;
the optical film group comprises N optical film layers which are sequentially stacked along the light-emitting surface of the light guide plate, wherein N is more than or equal to 2;
the N optical film layers are numbered from 1 to N in sequence from the light emitting surface of the light guide plate, the optical film layer with the number of i further comprises a plurality of types of second grooves, the plurality of types of second grooves are numbered from i +1 to N, and the number of the second grooves with the number of j is the same as the number of the extending parts of the optical film layer with the number of j; i is more than or equal to 1 and less than N, and i is more than j and less than N;
and the orthographic projection of the extension part of the optical film layer with the number j on the light guide plate covers the orthographic projection of the second groove with the number j on the light guide plate.
2. The backlight module of claim 1, further comprising: an adhesive layer;
the bonding layer is used for bonding and fixing the extension part and the first groove.
3. A backlight module according to claim 2, wherein the depth of the first groove is equal to the sum of the thickness of the adhesive layer and the thickness of the extension corresponding to the first groove.
4. A backlight module according to claim 2, wherein the depth of the second groove numbered j is equal to the sum of the thickness of the adhesive layer and the thickness of the optical film layer numbered j.
5. The backlight module according to claim 1, wherein the at least one first groove is located on a same side of the light guide plate.
6. The backlight module of claim 5, further comprising: a light source;
the light source is arranged on at least one side of the light guide plate, and the light source and the at least one first groove are arranged on different side faces of the light guide plate.
7. The backlight module according to claim 1, wherein the at least one first groove is distributed on different sides of the light guide plate.
8. The backlight module of claim 1, further comprising: a back plate;
the back plate is used for accommodating the light guide plate and the optical film group.
9. A display device, comprising: the backlight module comprises a backlight module and a display panel;
the backlight module as claimed in any one of claims 1-8.
10. An electronic device, comprising: a backlight module according to any one of claims 1 to 8.
Priority Applications (1)
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| CN112882290B (en) * | 2021-03-29 | 2022-09-06 | 厦门天马微电子有限公司 | Backlight module and display device |
| CN113156709A (en) * | 2021-05-18 | 2021-07-23 | 北京京东方显示技术有限公司 | Backlight module and display device |
| CN114530097A (en) * | 2022-03-15 | 2022-05-24 | Tcl华星光电技术有限公司 | Display device |
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| CN204313140U (en) * | 2015-01-12 | 2015-05-06 | 昆山龙腾光电有限公司 | Backlight module and liquid crystal display |
| CN204420764U (en) * | 2015-03-11 | 2015-06-24 | 冠捷显示科技（厦门）有限公司 | A kind of side entrance back module and display unit |
| CN207833185U (en) * | 2018-02-12 | 2018-09-07 | 昆山龙腾光电有限公司 | A kind of backlight module and display device |
| CN210835510U (en) * | 2019-08-27 | 2020-06-23 | 昆山龙腾光电股份有限公司 | Backlight module and display device |
| TW202034033A (en) * | 2019-03-11 | 2020-09-16 | 中強光電股份有限公司 | Backlight module and display apparatus |
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| CN204313140U (en) * | 2015-01-12 | 2015-05-06 | 昆山龙腾光电有限公司 | Backlight module and liquid crystal display |
| CN204420764U (en) * | 2015-03-11 | 2015-06-24 | 冠捷显示科技（厦门）有限公司 | A kind of side entrance back module and display unit |
| CN207833185U (en) * | 2018-02-12 | 2018-09-07 | 昆山龙腾光电有限公司 | A kind of backlight module and display device |
| TW202034033A (en) * | 2019-03-11 | 2020-09-16 | 中強光電股份有限公司 | Backlight module and display apparatus |
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