Backlight module and display device

Abstract

The utility model provides a backlight module and a display device. The backlight module is used for providing backlight for a display panel. The backlight module comprises a light guide plate which comprises a light emitting surface, at least one side of the periphery of the light emitting surface is a light incident side, and the other side opposite to the light incident side is a high beam side; the optical film material is arranged on the light emitting surface of the light guide plate; the rubber frame is arranged on the peripheral side of the light guide plate; the light source is arranged on the light incident side of the light guide plate and located between the rubber frame and the light guide plate; the shading adhesive tape comprises a main body part and an extending edge covering part, one surface of the main body part is adhered to the display panel, and the other surface of the main body part is adhered to one surface, facing the display panel, of the optical film material and the rubber frame; wherein at least on the distance light side, the extending edge covering part extends out of the edge of the main body part, is folded relative to the main body part and is fixed to the peripheral side of the rubber frame. According to the backlight module and the display device, the wrinkling phenomenon of the optical film material can be improved.

Description

Technical Field

[0001] The utility model relates to the field of display technology, in particular to a backlight module and a display device. Background Art

[0002] Liquid Crystal Display (LCD) includes a display panel and a backlight module, and the backlight module is used to provide backlight for the display panel. The backlight module includes a light guide plate, an optical film material, a plastic frame, and a light-shielding tape, etc., wherein the display panel and the backlight module are bonded by the light-shielding tape. However, during the high-temperature reliability verification process, the optical film material will wrinkle, resulting in reduced product reliability. Utility Model Content

[0003] The present disclosure provides a backlight module and a display device, which can improve the wrinkle phenomenon of optical film materials.

[0004] The technical solutions provided by the embodiments of the present disclosure are as follows:

[0005] A backlight module is used to provide backlight for a display panel; the backlight module comprises:

[0006] The light guide plate comprises a light emitting surface, wherein at least one side of the surrounding sides of the light emitting surface is a light incident side, and the other side opposite to the light incident side is a far beam side;

[0007] An optical film material is arranged on the light emitting surface of the light guide plate;

[0008] A plastic frame, arranged on the outer peripheral side of the light guide plate;

[0009] A light source is disposed on the light incident side of the light guide plate and is located between the plastic frame and the light guide plate; and

[0010] A light-shielding tape, comprising a main body portion and an extended edge portion, wherein one side of the main body portion is bonded to the display panel, and the other side is bonded to the optical film material and a side of the adhesive frame facing the display panel;

[0011] Wherein, at least on the high beam side, the extended edging portion extends from the edge of the main body portion and is folded relative to the main body portion and fixed to the outer peripheral side of the rubber frame.

[0012] Exemplarily, at least on the high beam side, a surface of the plastic frame facing the display panel is provided with a plurality of raised stripes, and an extension direction of the raised stripes is perpendicular to a direction pointing from the light incident side to the high beam side.

[0013] Exemplarily, the backlight module also includes a back panel, which includes a bottom panel portion and a side panel portion, wherein the bottom panel portion is arranged on the side of the light guide plate away from the light emitting surface, and the side panel portion is located on the outer peripheral side of the rubber frame; wherein the extended edging portion is bonded to at least one of the rubber frame and the side panel portion.

[0014] Exemplarily, an avoidance pit is provided on the outer peripheral side surface of at least one of the rubber frame and the side panel portion at a position corresponding to the extended edging portion, the extended edging portion is pasted and fixed in the avoidance pit, and the difference between the depression depth of the avoidance pit and the thickness of the extended edging portion is less than or equal to a threshold value.

[0015] Exemplarily, a notch is provided at the connecting corner between the edge of the main body part and the edge of the extended edging part; at least one of the edge corner of the extended edging part and the connecting corner between the edge of the main body part and the notch is constructed as an arc transition corner, and the inner contour line of the notch is constructed as a smooth curve.

[0016] Exemplarily, the side of the light-shielding tape used for bonding to the display panel is a first surface, and the first surface includes an adhesive area and an adhesive-free area, the adhesive area is bonded to the display panel, and the adhesive-free area is located on the outer periphery of the adhesive frame.

[0017] Exemplarily, a folding line is formed at the position where the extended edge portion is folded relative to the main body portion; a boundary line is formed at the boundary position between the non-glue area and the glue area; wherein,

[0018] The boundary line coincides with the fold line; or,

[0019] In the direction in which the extended edging portion extends from the edge of the main body portion toward the outer periphery of the rubber frame, the boundary line is offset relative to the folding line toward the direction in which the outer periphery of the rubber frame is located.

[0020] Exemplarily, in the direction from the light guide plate to the plastic frame, the edge of the main body away from the light guide plate is the outer edge, and the outer edge protrudes a first distance relative to the fold line in the direction away from the light guide plate;

[0021] In the direction in which the extended edge portion extends from the edge of the main portion to the outer periphery of the plastic frame, the boundary line is offset by a second distance relative to the folding line in the direction in which the outer periphery of the plastic frame is located;

[0022] The second distance is greater than or equal to the first distance.

[0023] Exemplarily, a fold line is formed at the position where the extended edging portion is folded relative to the main body portion, a hollow blank area is provided on the light-shielding tape at a position corresponding to the fold line, and at least a portion of the hollow blank area is located on the main body portion.

[0024] Exemplarily, the hollow blank area has a first end and a second end opposite to each other along the extension direction of the fold line, and the corner positions corresponding to the first end and the second end are both in the shape of smooth arc corners.

[0025] A display device comprises: a display panel; and the backlight module as described above.

[0026] The beneficial effects brought by the embodiments of the present disclosure are as follows:

[0027] In the backlight module and display device provided by the embodiments of the present disclosure, the backlight module includes a light guide plate, an optical film material, a light source, a glue frame and a shading tape, etc. The shading tape includes a main body part and an extended edging part. One side of the main body part is bonded to the display panel, and the other side is bonded to the glue frame and the side of the optical film material facing the display panel at the same time, so as to play a shading role while pasting and fixing the display panel and the backlight module. The extended edging part extends from at least the edge of the far light side of the main body part, and is folded relative to the main body part and pasted and fixed to the outer peripheral side of the glue frame. In this way, by extending the shading tape at least on the far light side and edging it, the bonding force between the shading tape and the glue frame is improved, and the shading tape is prevented from shrinking under force, thereby preventing the optical film material bonded to the shading tape from shrinking and causing wrinkles. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 A schematic diagram showing a cross-sectional structure of a display module and a display panel provided in an embodiment of the present disclosure on the high beam side;

[0029] Figure 2 A schematic diagram showing the structure of a light-shielding tape in a backlight module provided by an embodiment of the present disclosure;

[0030] Figure 3 express Figure 2 Schematic diagram of the local structure at the dotted box E;

[0031] Figure 4 One of the three-dimensional schematic diagrams showing the partial structure of the backlight module provided by the embodiment of the present disclosure;

[0032] Figure 5 A second three-dimensional schematic diagram showing a partial structure of a backlight module provided in an embodiment of the present disclosure;

[0033] Figure 6A flowchart showing a process for manufacturing a light-shielding tape in a backlight module provided by an embodiment of the present disclosure;

[0034] Figure 7 A schematic diagram showing a cross-sectional structure of a display module and a display panel provided in an embodiment of the present disclosure on the light incident side;

[0035] Figure 8 The second schematic diagram shows the cross-sectional structure of the display module and the display panel provided in the embodiment of the present disclosure on the light incident side. DETAILED DESCRIPTION

[0036] In order to make the purpose, technical solution and advantages of the embodiments of the present disclosure clearer, the technical solution of the embodiments of the present disclosure will be clearly and completely described below in conjunction with the drawings of the embodiments of the present disclosure. Obviously, the described embodiments are part of the embodiments of the present disclosure, not all of the embodiments. Based on the described embodiments of the present disclosure, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present disclosure.

[0037] Unless otherwise defined, the technical terms or scientific terms used in the present disclosure should be understood by people with ordinary skills in the field to which the present disclosure belongs. The "first", "second" and similar words used in the present disclosure do not indicate any order, quantity or importance, but are only used to distinguish different components. Similarly, similar words such as "one", "one" or "the" do not indicate quantity restrictions, but indicate that there is at least one. Similar words such as "include" or "comprise" mean that the elements or objects appearing before the word cover the elements or objects listed after the word and their equivalents, without excluding other elements or objects. Similar words such as "connect" or "connected" are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. "Up", "down", "left", "right" and the like are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0038] Before describing in detail the backlight module and the display device provided by the embodiments of the present disclosure, the following description is given of the related technologies:

[0039] In the related art, a liquid crystal display (LCD) device includes a display panel and a backlight module, and the backlight module is used to provide backlight for the display panel. The backlight module includes a light guide plate, an optical film material, a plastic frame, and a light-shielding tape, etc., wherein the display panel and the backlight module are bonded by the light-shielding tape. However, during the high-temperature reliability verification process, the optical film material will wrinkle, resulting in reduced product reliability.

[0040] The inventors of the present disclosure have found that one of the reasons for the above problem is that the display panel is generally provided with a lower polarizer (POL) on its backlight side. The light-shielding tape is a double-sided adhesive tape, the upper surface of which is bonded to the lower polarizer, and the lower surface is bonded to the adhesive frame and the surface of the optical film facing the display panel, thereby fixing the display panel and shielding the light at the same time.

[0041] The key structure of the lower polarizer is the PVA film (polyvinyl alcohol film). The PVA film is a high molecular polymer that is dyed with various organic dyes with dichroic properties and stretched under certain humidity and temperature conditions to absorb the dichroic dyes to form polarization properties. After dehydration and drying, the original polarizer film is formed.

[0042] The manufacturing process of PVA film determines that it will shrink and rebound in high temperature environment. This characteristic will cause the light-shielding tape of the backlight module and the film layer of the optical film material facing the display panel (such as the upper light-enhancing film layer) to shrink inward and produce wrinkles when the backlight module is subjected to high temperature experiments. And it has been verified that polarizers shrink to varying degrees after HTS (high temperature storage) and TST (temperature shock), and the thicker the PVA film, the greater the shrinkage rate.

[0043] In view of this characteristic of the polarizer, it is necessary to optimize the design of the backlight module to suppress the influence of the polarizer on the optical film. Therefore, the embodiment of the present disclosure provides a backlight module and a display device, which can improve the wrinkle phenomenon of the optical film.

[0044] Figure 1 FIG. 1 is a schematic diagram of a partial cross-sectional structure of a backlight module provided by an embodiment of the present disclosure on the high beam side. Figure 1As shown, the backlight module 10 provided in the embodiment of the present disclosure is used to provide backlight for the display panel 20. The backlight module 10 includes a light guide plate 110, an optical film material 120, a plastic frame 130, a light source 140 and a light shielding tape 150, etc., wherein the light guide plate 110 includes a light emitting surface, at least one side of the surrounding sides of the light emitting surface is a light incident side B, and the other side opposite to the light incident side B is a far light side C; the optical film material 120 is arranged on the light emitting surface of the light guide plate 110; the plastic frame 130 is arranged on the outer peripheral side of the light guide plate 110; the light source 140 is arranged on the light incident side B of the light guide plate 110, and is located on the plastic frame 130. The light-shielding tape 150 comprises a main body portion 151 and an extended edging portion 152, wherein one side of the main body portion 151 is bonded to the display panel 20, and the other side is bonded to the optical film material 120 and a side of the adhesive frame 130 facing the display panel 20; wherein, at least on the high beam side C, the extended edging portion 152 extends from the edge of the main body portion 151 and is folded relative to the main body portion 151, and is fixed to the outer peripheral side of the adhesive frame 130.

[0045] In the above scheme, the shading tape 150 includes a main body portion 151 and an extended edging portion 152. One side of the main body portion 151 is bonded to the display panel 20, and the other side is bonded to the plastic frame 130 and the side of the optical film material 120 facing the display panel 20, so as to play a shading role while pasting and fixing the display panel 20 and the backlight module 10. The extended edging portion 152 extends from at least the edge of the far light side C of the main body portion 151, and is folded relative to the main body portion 151 and pasted and fixed to the outer peripheral side of the plastic frame 130. In this way, by extending the shading tape 150 at least on the far light side C and edging it, the bonding force between the shading tape 150 and the plastic frame 130 is improved, and the shading tape 150 is prevented from shrinking under force, thereby preventing the optical film material 120 bonded to the shading tape 150 from shrinking and wrinkling.

[0046] In some exemplary embodiments, Figure 1 As shown, the display panel 20 includes a light-emitting side and a backlight side that are arranged opposite to each other, the light-emitting side of the display panel 20 is provided with an upper polarizer 21, and the backlight side of the display panel 20 is provided with a lower polarizer 22. The main body 151 of the light-shielding tape 150 is bonded to the lower polarizer 22 to achieve bonding and fixing with the display panel 20. The main structural film layer of the lower polarizer 22 can be a PVA film.

[0047] The lower polarizer 22 will shrink and rebound in a high temperature environment, and the direction of shrinkage and rebound is mainly from the light incident side B to the far light side C. Therefore, in combination with the shrinkage and rebound direction of the lower polarizer 22, the light shielding tape 150 is provided with the extended edge portion 152 at least on the far light side C, which can improve the bonding force between the light shielding tape 150 and the adhesive frame 130 in the shrinkage and rebound direction of the lower polarizer 22, thereby preventing the light shielding tape 150 from shrinking under force, and achieving the technical effect of preventing the optical film material 120 from shrinking and causing wrinkles.

[0048] It should be noted that the extended edging portion 152 is not limited to being disposed only on the high beam side C, but may also be disposed on the light incident side B, or other sides of the surrounding sides of the light guide plate 110 .

[0049] In some exemplary embodiments, the light source 140 is disposed on the light incident side B, and the light source 140 may be any suitable structure such as a light bar. For example, if the light source 140 includes a light bar, the light bar may be installed in the backlight module 10 in a forward or reverse manner.

[0050] In some embodiments, Figure 7 As shown, when the light bar is installed in the backlight module 10 in a positive assembly manner, the light bar includes a circuit substrate 141 and a lamp bead 142. The circuit substrate 141 is located on the side of the lamp bead 142 close to the display panel 20, and a part of the circuit substrate 141 overlaps the light emitting surface of the light guide plate 110. On the light incident side B, the main body 151 of the light shielding tape 150 can be simultaneously pasted on the plastic frame 130, the circuit substrate 141 and the side of the optical film material 120 facing the display panel 20. At this time, since the circuit substrate 141 has a sufficient width, the bonding force between the main body 151 and the plastic frame 130 and the circuit substrate 141 on the light incident side B is large enough, so the edge of the main body 151 on the light incident side B does not need to be extended.

[0051] In other embodiments, Figure 8As shown, when the light bar is installed in the backlight module 10 in a reverse assembly manner, the light bar includes a circuit substrate 141 and lamp beads 142, and the lamp beads 142 are located on the side of the circuit substrate 141 facing the display panel 20. At this time, the main body 151 of the light-shielding tape 150 can be simultaneously pasted on the side of the plastic frame 130 and the side of the optical film material 120 facing the display panel 20. At this time, on the light-entering side B, the bonding force between the main body 151 and the plastic frame 130 may not be large enough, so the edge of the light-entering side B of the main body 151 can extend out of the extended edging portion 152 for edging, so as to improve the bonding force between the light-entering side B of the light-entering tape 150 and the plastic frame 130, and further prevent the light-shielding tape 150 from shrinking under force, thereby preventing the optical film material 120 bonded to the light-shielding tape 150 from shrinking and causing wrinkles.

[0052] Of course, it is understandable that in other embodiments, it is not limited to this. For example, no matter whether the light bar is installed in the backlight module 10 in a positive group or a reverse group, the edge B of the light incident side of the main part 151 is not extended for edging, or the edge B of the light incident side of the main part 151 can extend out of the extended edging part 152 for edging.

[0053] Furthermore, in some exemplary embodiments, Figure 1 As shown, at least on the high beam side C, a surface of the plastic frame 130 facing the display panel 20 is provided with a plurality of raised stripes 131 , and the extending direction of the raised stripes 131 is perpendicular to the direction from the light incident side B to the high beam side C.

[0054] By adopting the above scheme, a plurality of raised stripes 131 are provided on at least the far light side C of the side of the glue frame 130 facing the display panel 20, so as to increase the bonding area between the light-shielding tape 150 and the glue frame 130, thereby increasing the bonding force between the light-shielding tape 150 and the glue frame 130, and the extension direction of the raised stripes 131 is perpendicular to the direction from the light incident side B to the far light side C, that is, the extension direction of the raised stripes 131 is perpendicular to the retraction and rebound direction of the lower polarizer 22, which can effectively prevent the light-shielding tape 150 from retracting under force.

[0055] For example, after the convex stripes 131 are provided on one side of the plastic frame 130 facing the display panel 20, the surface roughness Ra can be about 1. In this way, the bonding area between the light shielding tape 150 and the plastic frame 130 can be increased, and the light shielding tape 150 and the plastic frame 130 will not be loosely bonded due to the concave-convex texture. However, the present invention is not limited thereto.

[0056] It should be understood that the raised stripes 131 may also be provided on other sides of the periphery of the light guide plate 110 and on a side of the plastic frame 130 facing the display panel 20 , and are not limited to the high beam side C.

[0057] Furthermore, in some exemplary embodiments, Figure 1 As shown, the backlight module 10 also includes a back panel 160, and the back panel 160 includes a bottom panel portion 161 and a side panel portion 162, wherein the bottom panel portion 161 is disposed on the side of the light guide plate 110 away from the light emitting surface, and the side panel portion 162 is located on the outer peripheral side of the plastic frame 130; wherein the extended edging portion 152 is bonded to at least one of the plastic frame 130 and the side panel portion 162.

[0058] For example, Figure 1 As shown in the figure, for example, in the direction perpendicular to the display panel 20, the side panel portion 162 is located in a partial area of ​​the outer periphery of the plastic frame 130 away from the display panel 20, and at this time, the extended edge portion 152 can be bonded to the outer periphery of the plastic frame 130 and the side panel portion 162 at the same time. In other embodiments not shown, the extended edge portion 152 can also be bonded only to the outer periphery of the plastic frame 130, or only to the outer periphery of the side panel portion 162.

[0059] In some exemplary embodiments, Figure 1 As shown, the extended edge portion 152 also extends from the outer peripheral side of the plastic frame 130 to the side of the bottom plate portion 161 away from the display panel 20, so as to further improve the bonding force between the light shielding tape 150 and the plastic frame 130. It can be understood that in other embodiments, the extended edge portion 152 can also be extended and bonded only to the outer peripheral side of the plastic frame 130.

[0060] Furthermore, in some exemplary embodiments, Figure 4 As shown, an avoidance pit S3 is provided on the outer peripheral side surface of at least one of the rubber frame 130 and the side panel portion 162 at a position corresponding to the extended edging portion 152, the extended edging portion 152 is pasted and fixed in the avoidance pit S3, and the difference between the recessed depth d of the avoidance pit S3 and the thickness h of the extended edging portion 152 is less than or equal to a threshold value.

[0061] By adopting the above solution, the threshold value can be 0 or as close to 0 as possible due to process conditions. By setting an avoidance pit S3 on the peripheral side surface of at least one of the plastic frame 130 and the side plate portion 162 to avoid the extended edge portion 152, and designing the difference between the recessed depth d of the avoidance pit S3 and the thickness h of the extended edge portion 152 to be less than or equal to the threshold value, the flatness of the peripheral side surface of the entire backlight module 10 can be improved.

[0062] For example, the depression depth d of the avoidance pit S3 may be 0.07 mm, and the film thickness h of the extended edge portion 152 may be 0.07 mm. However, the present invention is not limited thereto.

[0063] Exemplarily, the back plate 160 may be a metal back plate 160 . When the avoidance pit S3 is provided on the back plate 160 , the avoidance pit S3 may be manufactured by a forming method such as stamping.

[0064] Exemplarily, the rubber frame 130 can be made of a resin material. When the avoidance pit S3 is provided on the rubber frame 130, the rubber frame 130 having the avoidance pit S3 can be integrally formed by injection molding or other molding methods. At this time, when the raised stripes 131 are provided on the side of the rubber frame 130 facing the display panel 20, the stripe texture can be scraped out of the mold insert by a V-cut process, and the stripe texture can be transferred to the rubber frame 130 during molding. The V-cut process can be achieved by mechanical or laser cutting.

[0065] also, Figure 2 FIG. 1 is a schematic diagram showing the structure of the light shielding tape 150 when the extended edge portion 152 is not folded. Figure 2 and Figure 3 As shown, in some exemplary embodiments, a notch S4 is provided at the connecting corner between the edge of the main body portion 151 and the edge of the extended edge portion 152. By providing the notch S4, wrinkles can be avoided at the connecting corner between the extended edge portion 152 and the main body portion 151 when the extended edge portion 152 is folded relative to the main body portion 151.

[0066] In some embodiments, Figure 3As shown, at least one of the edge corner R1 of the extended hemming portion 152 and the connecting corner R2 between the edge of the main portion 151 and the notch S4 is configured as a circular arc transition corner, and the inner contour line of the notch S4 is configured as a smooth curve. In other words, at least one of the edge corner R1 of the extended hemming portion 152 and the connecting corner R2 between the main portion 151 and the notch S4 is rounded and chamfered, and the corner position R3 in the inner contour of the notch S4 is rounded and chamfered. In this way, the risk of tearing at each corner can be reduced.

[0067] For example, see Figure 3 As shown, the edge corner R1 of the extended edge portion 152 can be rounded by R0.05mm; the connecting corner R2 between the main portion 151 and the notch S4 can be rounded by R0.05mm; and the corner position R3 in the inner contour of the notch S4 can be rounded by R0.02mm. However, it is not limited thereto.

[0068] In some exemplary embodiments, Figure 3 As shown, the side of the light shielding tape 150 used for bonding with the display panel 20 is a first surface, and the first surface includes an adhesive area 150a and an adhesive-free area 150b, the adhesive area 150a is bonded to the display panel 20, and the adhesive-free area 150b is located on the outer peripheral side of the adhesive frame 130. Exemplarily, the light shielding tape 150 may be a double-sided adhesive tape, and the adhesive-free area 150b may be formed by providing a protective film on the first surface, and the protective film includes but is not limited to a PET film (polyester base film) and the like.

[0069] In some exemplary embodiments, Figure 3 As shown, a folding line c1 is formed at the position where the extended edging portion 152 is folded relative to the main portion 151, and the folding line c1 is the edge line of the glue frame 130 on the side away from the light guide plate 110. A boundary line c2 is formed at the boundary position between the non-glue area 150b and the glue area 150a. The boundary line c2 and the folding line c1 may coincide with each other; or, in the direction in which the extended edging portion 152 extends from the edge of the main portion 151 to the outer periphery of the glue frame 130, the boundary line c2 is offset relative to the folding line c1 toward the direction where the outer periphery of the glue frame 130 is located.

[0070] By adopting the above solution, it can be ensured that the adhesive area 150 a can completely cover the side of the adhesive frame 130 facing the display panel 20 , so as to increase the bonding force between the light shielding tape 150 and the adhesive frame 130 as much as possible.

[0071] In some exemplary embodiments, Figure 3As shown, in the direction from the light guide plate 110 to the plastic frame 130, the side edge of the main body 151 away from the light guide plate 110 is the outer edge 1511, and the outer edge 1511 protrudes a first distance d1 relative to the folding line c1 in the direction away from the light guide plate 110. In other words, the outer edge 1511 of the main body 151 should exceed the outer edge 1511 of the plastic frame 130, so that a certain allowable assembly deviation can be reserved for the light-shielding tape 150 to ensure that the bonding area between the main body 151 and the plastic frame 130 is maximized.

[0072] In some exemplary embodiments, Figure 3 As shown, in the direction in which the extended edging portion 152 extends from the edge of the main portion 151 to the outer periphery of the rubber frame 130, the intersection line c2 is offset by a second distance d2 relative to the folding line c1 toward the direction in which the outer periphery of the rubber frame 130 is located. In other words, as shown in the figure, when the extended edging portion 152 is not folded, there is a second distance d2 between the intersection line c2 and the outer edge 1511 of the rubber frame 130. In this way, a certain allowable assembly deviation can be reserved for the light-shielding tape 150 to ensure that the bonding area between the main portion 151 and the rubber frame 130 is maximized. And, illustratively, the second distance d2 can be equal to about 0.12 mm.

[0073] See also Figure 6 As shown, the manufacturing process of the shading tape 150 can be as follows: first, a protective film 16 is covered on a partial area of ​​the shading tape original material 15; then, the shading tape original material 15 is cut according to the shading tape 150 pattern corresponding to a single display panel 20 to obtain a plurality of shading tape 150 patterns, wherein the area covered with the protective film 16 can be cut to form a non-glue area 150b. If the second distance d2 is less than the first distance d1, the boundary line c2 between the non-glue area 150b and the glue area 150a is closer to the folding line c1 than the outer edge 1511 of the main part 151, which will cause the protective film to be partially located on the outer edge 1511 of the main part 151. In other words, there will be a partial non-glue area 150b on the outer edge 1511 of the main part 151, which will cause the bonding force between the main part 151 and the glue frame 130 to be weakened.

[0074] Therefore, in some exemplary embodiments, Figure 3As shown, the second distance d2 is greater than or equal to the first distance d1. Please refer to the figure, when the second distance d2 is equal to the first distance d1 when the extended edge portion 152 is not folded, the boundary line c2 between the non-glue area 150b and the glue area 150a can be flush with the outer edge 1511 of the main body 151; or, when the second distance d2 is greater than the first distance d1, the boundary line c2 deviates further from the folding line c1 than the outer edge 1511 of the main body 151. In this way, it can be ensured that the process of manufacturing the light-shielding tape 150 is easy, and there will be no non-glue area 150b on the outer edge 1511 of the main body 151, thereby avoiding the weakening of the bonding force between the main body 151 and the glue frame 130. Exemplarily, the second distance d2 is 0.12 mm. However, it is not limited to this.

[0075] In some exemplary embodiments, in a direction perpendicular to the light guide plate 110, the length L of the extended edge portion 152 along its extension direction may be greater than or equal to the height of the outer peripheral side of the plastic frame 130. Exemplarily, the length of the extended edge portion 152 along its extension direction is 1.2 mm, the height of the outer peripheral side of the plastic frame 130 is 0.8 mm, and the width of the extended edge portion 152 attached to the bottom plate portion 161 is 0.4 mm. However, this is not limited to this, and can be adjusted according to the actual product size.

[0076] In addition, in some exemplary embodiments, Figure 5 As shown, a hollow blank area 153 is provided on the light-shielding tape 150 at a position corresponding to the folding line c1, and at least a part of the hollow blank area 153 is located on the main body 151.

[0077] By adopting the above scheme, a hollow blank area 153 is set at the position of the folding line c1, and at least a part of the hollow blank area 153 is located on the main part 151. In this way, on the one hand, when the backlight module 10 and the display panel 20 are assembled, the hollow blank area 153 can be used as a positioning mark to ensure that the assembly equipment recognizes the positioning mark and ensures the assembly positioning accuracy; on the other hand, the hollow blank area 153 can further ensure that there will be no wrinkles at the folding position of the shading tape 150.

[0078] For example, Figure 3 As shown, the hollow blank area 153 has a first end 153a and a second end 153b opposite to each other along the extension direction of the fold line c1, and the corner positions corresponding to the first end 153a and the second end 153b are both smooth arc corners. In this way, the ends of the hollow blank area 153 can be prevented from having sharp corners, thereby preventing tearing.

[0079] Exemplarily, the pattern of the hollow blank area 153 may include: a first end area 1531 located at the first end 153a, a second end area 1532 located at the second end 153b, and a middle extension area 1533 located between the first end area 1531 and the second end area 1532, wherein in the direction from the first end 153a to the second end 153b, the first end area 1531 presents a shape of gradually expanding inner diameter, and the inner contour of the first end area 1531 is rounded at the corner; the second end area 1532 presents a shape of gradually converging inner diameter, and the inner contour of the second end area 1532 is rounded at the corner; the middle extension area 1533 may be a long strip of equal diameter. The above is only an example. In actual applications, the pattern of the hollow blank area 153 is not limited thereto. For example, the pattern of the hollow blank area 153 may also be a runway pattern.

[0080] In some embodiments, Figure 1 As shown, the optical film material 120 may include an upper prism sheet 121, a lower prism sheet 122 and a diffuser sheet 123 stacked in sequence from a side close to the display panel 20 to a side away from the display panel 20, wherein the first surface of the shading tape 150 may be adhered to the side of the upper prism sheet 121 facing the display panel 20.

[0081] Considering the thickness relationship of each component in the actual backlight module, the optical film material 120 can be a two-in-one composite film material, which is equivalent to the upper prism sheet 121 and the lower prism sheet 122 being composited into one. The diffuser 123 is located between the two-in-one composite film material and the light guide plate 110. The thickness of this two-in-one composite film material can be about 82 μm. Therefore, the thickness of the entire backlight module can be reduced from 1.17 mm to about 1.1 mm.

[0082] It should also be noted that the optical film 120 can also be a three-in-one composite film, that is, an upper prism sheet, a lower prism sheet and a diffuser sheet are composited into one. The thickness of this three-in-one composite film can be about 118 μm, which can further reduce the thickness of the backlight module.

[0083] In addition, in some embodiments, a camera is provided on the display device assembled by the display panel 20 and the backlight module 10, and the camera may be located on the high beam side C. Figure 2 As shown, on the high beam side C, the extended edging portion 152 can be divided into two edging sub-areas, namely a first edging sub-area 152A and a second edging sub-area 152B. The two edging sub-areas can be located on opposite sides of the camera (the area indicated by S5 in the figure is used to install the camera).

[0084] In addition, the embodiment of the present disclosure further provides a display device, including: a display panel 20; and a backlight module 10 provided by the embodiment of the present disclosure. Obviously, the display device provided by the embodiment of the present disclosure also has the beneficial effects brought by the backlight module 10 provided by the embodiment of the present disclosure, which will not be repeated here.

[0085] There are a few points to note:

[0086] (1) The drawings of the embodiments of the present disclosure only relate to the structures related to the embodiments of the present disclosure, and other structures may refer to the general design.

[0087] (2) For the sake of clarity, in the drawings used to describe the embodiments of the present disclosure, the thickness of layers or regions is exaggerated or reduced, that is, these drawings are not drawn according to the actual scale. It is understood that when an element such as a layer, film, region or substrate is referred to as being "on" or "under" another element, the element may be "directly" "on" or "under" the other element or there may be intermediate elements.

[0088] (3) In the absence of conflict, the embodiments of the present disclosure and the features therein may be combined with each other to obtain new embodiments.

[0089] The above are only specific implementations of the present disclosure, but the protection scope of the present disclosure is not limited thereto, and the protection scope of the present disclosure shall be based on the protection scope of the claims.

Claims

1. A backlight module, used to provide backlight for a display panel; characterized in that: The backlight module comprises: The light guide plate comprises a light emitting surface, wherein at least one side of the surrounding sides of the light emitting surface is a light incident side, and the other side opposite to the light incident side is a far beam side; An optical film material is arranged on the light emitting surface of the light guide plate; A plastic frame, arranged on the outer peripheral side of the light guide plate; A light source is disposed on the light incident side of the light guide plate and is located between the plastic frame and the light guide plate; and A light-shielding tape, comprising a main body portion and an extended edge portion, wherein one side of the main body portion is bonded to the display panel, and the other side is bonded to the optical film material and a side of the adhesive frame facing the display panel; Wherein, at least on the high beam side, the extended edging portion extends from the edge of the main body portion and is folded relative to the main body portion and fixed to the outer peripheral side of the rubber frame.

2. The backlight module according to claim 1, characterized in that: At least on the high beam side, a surface of the plastic frame facing the display panel is provided with a plurality of raised stripes, and an extending direction of the raised stripes is perpendicular to a direction pointing from the light incident side to the high beam side.

3. The backlight module according to claim 1, characterized in that: The backlight module also includes a back panel, which includes a bottom panel portion and a side panel portion, wherein the bottom panel portion is arranged on the side of the light guide plate away from the light emitting surface, and the side panel portion is located on the outer peripheral side of the rubber frame; wherein the extended edging portion is bonded to at least one of the rubber frame and the side panel portion.

4. The backlight module according to claim 3, characterized in that: An avoidance pit is provided on the outer peripheral side surface of at least one of the rubber frame and the side panel portion at a position corresponding to the extended edging portion, the extended edging portion is glued and fixed in the avoidance pit, and the difference between the depression depth of the avoidance pit and the thickness of the extended edging portion is less than or equal to a threshold value.

5. The backlight module according to claim 1, characterized in that: A notch is provided at the connecting corner between the edge of the main body part and the edge of the extended edging part; at least one of the edge corner of the extended edging part and the connecting corner between the edge of the main body part and the notch is constructed as an arc transition corner, and the inner contour line of the notch is constructed as a smooth curve.

6. The backlight module according to claim 1, characterized in that: The side of the light-shielding tape used for bonding with the display panel is a first surface, and the first surface includes an adhesive area and an adhesive-free area. The adhesive area is bonded to the display panel, and the adhesive-free area is located on the outer periphery of the adhesive frame.

7. The backlight module according to claim 6, characterized in that: A folding line is formed at the position where the extended edge portion is folded relative to the main body portion; a boundary line is formed at the boundary position between the non-glue area and the glue area; wherein, The boundary line coincides with the fold line; or, In the direction in which the extended edging portion extends from the edge of the main body portion toward the outer periphery of the rubber frame, the boundary line is offset relative to the folding line toward the direction in which the outer periphery of the rubber frame is located.

8. The backlight module according to claim 7, characterized in that: In the direction from the light guide plate to the plastic frame, the edge of the main body away from the light guide plate is an outer edge, and the outer edge protrudes a first distance away from the folding line in the direction away from the light guide plate; In the direction in which the extended edge portion extends from the edge of the main portion to the outer periphery of the plastic frame, the boundary line is offset by a second distance relative to the folding line in the direction in which the outer periphery of the plastic frame is located; The second distance is greater than or equal to the first distance.

9. The backlight module according to claim 1, characterized in that: A fold line is formed at the position where the extended edging portion is folded relative to the main portion, and a hollow blank area is provided on the light-shielding tape at a position corresponding to the fold line, and at least a part of the hollow blank area is located on the main portion.

10. The backlight module according to claim 9, characterized in that: The hollow blank area has a first end and a second end opposite to each other along the extension direction of the fold line, and the corner positions corresponding to the first end and the second end are both in the shape of smooth arc corners.

11. A display device, characterized in that: include: Display panel; and A backlight module as claimed in any one of claims 1 to 10.

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