CN218767391U - Side-in backlight module, display device and electronic equipment - Google Patents

Abstract

The application provides a lateral entrance type backlight module, a display device and an electronic device. The side-in type backlight module comprises an adhesive tape, a backlight shell, a reflecting sheet, a light guide plate and a plurality of light emitting devices, wherein the backlight shell is provided with a mounting groove, the light emitting devices are all mounted on the side wall of the mounting groove and are arranged at intervals along a first direction, the reflecting sheet is laminated on the bottom wall of the mounting groove, the light guide plate is laminated on one side of the reflecting sheet, which is far away from the bottom wall of the mounting groove, and the light incident surface of the light guide plate is arranged at intervals relative to the light emitting devices; the adhesive tape comprises a first sub adhesive tape, a second sub adhesive tape and a third sub adhesive tape, the first sub adhesive tape is adhered between the bottom wall of the mounting groove and the reflection sheet, the second sub adhesive tape comprises a plurality of point-shaped adhesive parts, the point-shaped adhesive parts are adhered between the light guide plate and the reflection sheet and are arranged at intervals along a first direction, and the third sub adhesive tape is fixedly connected between the first sub adhesive tape and the point-shaped adhesive parts. The technical scheme of this application can solve the sticky tape between light guide plate and the reflector plate and easily take place the problem of drifting.

Description

Side-in backlight module, display device and electronic equipment

Technical Field

The application relates to the technical field of batteries, in particular to a side-in type backlight module, a display device and electronic equipment.

Background

As the display device is continuously developed to be brighter, lighter and thinner, the side-in backlight module becomes the mainstream of the backlight module development at present. At present, in the design of the side-entry backlight module, a dot-shaped adhesive tape is usually disposed between the light guide plate and the reflective sheet to ensure uniform light in the visible area of the display device. However, when the external temperature changes rapidly, the point-like adhesive tape between the light guide plate and the reflective sheet is prone to drift, thereby causing white spots on the display panel and affecting the display effect of the display device.

SUMMERY OF THE UTILITY MODEL

The application provides a lateral entrance type backlight module, a display device and electronic equipment, which are used for solving the technical problem that an adhesive tape between a light guide plate and a reflector plate is easy to drift in the prior art.

In a first aspect, the application provides a side-in type backlight module, which includes an adhesive tape, a backlight housing, a reflector plate, a light guide plate and a plurality of light emitting devices, wherein the backlight housing is provided with a mounting groove, the mounting groove includes a groove bottom wall and a groove side wall, the groove side wall surrounds the groove bottom wall, the plurality of light emitting devices are all mounted on the groove side wall and are arranged at intervals along a first direction, the reflector plate is stacked on the groove bottom wall, the light guide plate is stacked on one side of the reflector plate departing from the groove bottom wall, and the light incident surface of the light guide plate is spaced from and arranged opposite to the plurality of light emitting devices; the adhesive tape comprises a first sub adhesive tape, a second sub adhesive tape and a third sub adhesive tape, the first sub adhesive tape is adhered between the bottom wall of the groove and the reflector plate, the second sub adhesive tape comprises a plurality of point-shaped adhesive parts, the point-shaped adhesive parts are adhered between the light guide plate and the reflector plate and are arranged at intervals along the first direction, and the third sub adhesive tape is fixedly connected between the first sub adhesive tape and the point-shaped adhesive parts and is adhered to the surface of the reflector plate facing the plurality of light-emitting devices. In this embodiment, the third sub-tape is arranged and connected to the first sub-tape and the second sub-tape, so that the first sub-tape and the second sub-tape can be connected into a whole; on the other hand, the plurality of spot-like adhesive parts of the second sub-adhesive tape can be prevented from drifting under the influence of air flow, water vapor and the like, white spots on the display panel are avoided, and therefore the good display effect of the display device is ensured.

In a possible embodiment, the first sub-tape, the second sub-tape and the third sub-tape are integrally formed. In this embodiment, first sub-sticky tape, second sub-sticky tape and third sub-sticky tape integrated into one piece, simple structure can practice thrift manufacturing cost.

In a possible embodiment, the third sub-tape includes a plurality of sub-tape portions, each of the plurality of sub-tape portions is adhered to a surface of the reflective sheet facing the plurality of light emitting devices and is arranged at intervals along the first direction, and each sub-tape portion is fixedly connected between the first sub-tape and one of the dot adhesive portions. In this embodiment, the plurality of sub-tape portions are arranged to connect the first sub-tape and the dot-shaped tape portion, so that the first sub-tape, the second sub-tape and the third sub-tape are connected as a whole.

In a possible embodiment, along the first direction, the length of each sub-adhesive tape portion is equal to the length of the point adhesive portion connected thereto. In this embodiment, along the first direction, the sub-tape portion has a length equal to the length of the dot adhesive portion connected thereto, so that the connection stability between the sub-tape portion and the dot adhesive portion connected thereto can be ensured.

In a possible embodiment, along the first direction, the length of each sub-adhesive tape portion is smaller than the length of the spot adhesive portion connected thereto. In this embodiment, along the first direction, the length of the sub-tape portion is smaller than the length of the dot-shaped adhesive portion connected to the sub-tape portion, so that the flexibility of the third sub-tape can be increased, and the dot-shaped adhesive portion can be further conveniently bent relative to the first sub-tape to be attached to the reflective sheet.

In a possible embodiment, one end of each sub-tape portion is fixedly connected to the first sub-tape, and the other end of each sub-tape portion is fixedly connected to the middle of one of the dot-shaped adhesive portions. In this embodiment, one end of the sub-tape portion is fixedly connected to the first sub-tape, and the other end of the sub-tape portion is fixedly connected to the middle of one dispensing portion, so that the first sub-tape is connected to the plurality of dispensing portions, thereby preventing the dispensing portions from drifting.

In a possible implementation manner, the first sub-tape includes a plurality of strip-shaped adhesive portions, and the plurality of strip-shaped adhesive portions are adhered between the bottom wall of the groove and the reflector plate and are arranged at intervals along the first direction; each sub adhesive tape part is fixedly connected between one strip adhesive part and one spot adhesive part. In the embodiment, the plurality of strip-shaped adhesive parts are arranged at intervals along the first direction, so that on one hand, the adhesive tape is convenient to adhere to the reflector plate, and the mounting process can be simplified; on the other hand, when external environment temperature sharply changes, the clearance between two adjacent strip glue portions can cushion the external force that the reflector plate received, avoids causing the reflector plate fold because of the thermal expansion coefficient mismatch between the membrane material of side income formula backlight unit to prevent that punctiform glue portion from taking place the drift because of the reflector plate fold, avoid appearing the white spot on the display panel, and then guarantee that display device's display effect is good.

In one possible embodiment, the first sub-tape comprises a first portion and a plurality of second portions, the first portion and the plurality of second portions are adhered between the bottom wall of the groove and the reflective sheet and are arranged at intervals along the first direction, and the length of the first portion is greater than that of the second portion along the first direction; the plurality of sub adhesive tape portions comprise a plurality of first adhesive tape portions and a plurality of second adhesive tape portions, each first adhesive tape portion is fixedly connected between one first portion and one dot-shaped adhesive portion, and each second adhesive tape portion is fixedly connected between one second portion and one dot-shaped adhesive portion. In this embodiment, by providing the first portion and the plurality of second portions, on one hand, the first portion can stably bond the backlight housing and the reflective sheet to ensure the assembly stability between the backlight housing and the reflective sheet; on the other hand, when external environment temperature sharply changes, the external acting force that the reflector plate received can be cushioned in the clearance between first portion and the second portion to and the clearance between two adjacent second portions, avoid causing the reflector plate fold because of the thermal expansion coefficient mismatch between the membrane material of side income formula backlight unit, thereby prevent that punctiform gluing portion from taking place the drift because of the reflector plate fold, avoid appearing the white spot on the display panel, and then guarantee that display device's display effect is good.

In a possible implementation manner, the lateral backlight module further includes a middle frame, the middle frame is stacked on a side of the reflector plate away from the bottom wall of the groove, and the middle frame is provided with a light hole, and the light hole penetrates through the middle frame along a thickness direction of the middle frame; along the first direction, the length l of each point-shaped adhesive part ₁ The distance between two adjacent spot-like glue parts is l ₃ The distance between two adjacent light-emitting devices is L ₂ Each of the light emitting devices has a length L ₅ Along the second direction, the width of each point-like glue part is l ₂ The distance between the light emitting surface of the light emitting device and the light incident surface of the light guide plate is L ₁ The distance between the light incident surface of the light guide plate and the hole wall of the light hole is L ₄ The light emission angle of the light emitting device is 2 theta ₁ Observable angle is theta ₂ In the first direction, the length l of each point-shaped adhesive part ₁ ＝L ₂ -2×(L ₁ ×tanθ ₁ ) Along the second direction, the width l of each point-shaped adhesive part ₂ ＝L ₄ -(L ₃ /tanθ ₂ ). In the embodiment, by designing the size of the spot adhesive part, on one hand, the spot adhesive part can be ensured to completely cover the light spot caused by the overlapping of the light emitting ranges between the adjacent light emitting devices, so that the light brightness of the display area of the display device is the same and uniform; on the other hand, the width of the spot adhesive part can be limited to the width of the human eyeThe size range observed by the method, thereby improving the display effect of the display device.

In a possible embodiment, along the first direction, the distance l between two adjacent spot-like adhesive parts ₃ ＝L ₅ +2×(L ₁ ×tanθ ₁ ). In this embodiment, the size of the dot adhesive portion can be further limited by designing the distance between two adjacent dot adhesive portions, so that the dot adhesive portion can cover the light spot, thereby ensuring a better display effect of the display device.

In one possible embodiment, the plurality of spot-like glue portions include a first spot-like glue portion and a plurality of second spot-like glue portions, a length of the first spot-like glue portion is greater than a length of the second spot-like glue portion along the first direction, and the first spot-like glue portion is disposed opposite to the positioning column of the light guide plate. In this embodiment, in the second direction, the length of the first dispensing portion is greater than that of the first dispensing portion, so as to cover a larger light spot generated by the positioning column, thereby ensuring that the brightness of the light in the visible area of the display device is the same and uniform.

In one possible embodiment, in the first direction, the first dispensing portion is located at a middle position of the plurality of dispensing portions, a part of the second dispensing portion is located at one side of the first dispensing portion, and a part of the second dispensing portion is located at the other side of the first dispensing portion. In this embodiment, in the first direction, the plurality of second dotted glue portions are disposed at intervals on two sides of the first dotted glue portion, the first dotted glue portion can cover a larger light spot generated by the positioning column, and the second dotted glue portion can cover a light spot caused by overlapping of light emitting ranges of the light emitting devices, so that light of the display panel is distributed more uniformly, and the display effect of the display device is improved.

In a possible implementation manner, the side-in type backlight module further includes a diffusion sheet, a lower prism sheet, and an upper prism sheet, and the diffusion sheet, the lower prism sheet, and the upper prism sheet are sequentially stacked on one side of the light guide plate away from the reflection sheet. In this embodiment, by disposing the diffusion sheet, the lower prism sheet and the upper prism sheet, the light emitted from the light emitting surface of the light guide plate can be uniformly transmitted, so as to ensure that the display device has a good display effect.

In a second aspect, the present application provides a display device, which includes a display panel and the above-mentioned side-in backlight module, where the side-in backlight module is disposed below the display panel. The display device provided by the embodiment can avoid white spots on the display panel by arranging the lateral backlight module, so that the light distribution of the visible area of the display device is uniform and the same, and the display quality of the display device is improved.

In a third aspect, the present application provides an electronic apparatus comprising a housing and a display device as described above, the display device being mounted inside the housing. The electronic device provided by the embodiment can improve the use experience of the user by arranging the display device.

In summary, the third sub-tape is arranged and connected with the first sub-tape and the second sub-tape, so that on one hand, the first sub-tape and the second sub-tape can be connected into a whole; on the other hand, the plurality of spot-like adhesive parts of the second sub-adhesive tape can be prevented from drifting due to the influence of air flow, water vapor and the like, white spots are prevented from being generated on the display panel, and therefore the good display effect of the display device is guaranteed.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments or the background art of the present application, the drawings required to be used in the embodiments or the background art of the present application will be described below.

Fig. 1 is a schematic structural diagram of an electronic device provided in the present application;

FIG. 2 isbase:Sub>A schematic cross-sectional view of the electronic device shown in FIG. 1 along A-A;

FIG. 3 is a schematic structural diagram of the electronic device shown in FIG. 2, wherein the adhesive tape is in a first embodiment;

FIG. 4 is a schematic plan view of the adhesive tape shown in FIG. 3;

FIG. 5 is a simplified structural diagram of a dot adhesive portion of an adhesive tape, a reflective sheet, and a light emitting device in the electronic device of FIG. 2;

FIG. 6 is a schematic view of the tape of FIG. 3 in an unrolled state;

FIG. 7 is a diagram illustrating a second embodiment of an adhesive tape in the electronic device of FIG. 2;

FIG. 8 is a schematic plan view of the tape of FIG. 7;

FIG. 9 is a schematic view of the tape of FIG. 7 in an unrolled state;

FIG. 10 is a schematic view of a third embodiment of an adhesive tape in the electronic device shown in FIG. 2;

FIG. 11 is a schematic plan view of the tape of FIG. 10;

FIG. 12 is a schematic view of the tape of FIG. 10 in an unrolled state;

FIG. 13 is a schematic view of a fourth embodiment of the electronic device shown in FIG. 2;

FIG. 14 is a schematic plan view of the tape of FIG. 13;

FIG. 15 is a schematic view of the tape of FIG. 13 in an unrolled state;

FIG. 16 is a schematic structural diagram of an electronic device shown in FIG. 2, wherein the electronic device is a fifth embodiment of an adhesive tape;

FIG. 17 is a schematic plan view of the tape of FIG. 16;

FIG. 18 is a schematic view of the tape of FIG. 16 in an unrolled state;

FIG. 19 is a diagram illustrating a sixth implementation of an adhesive tape in the electronic device of FIG. 2;

FIG. 20 is a schematic plan view of the tape of FIG. 19;

fig. 21 is a schematic view of the tape of fig. 19 in an unfolded state.

Detailed Description

The embodiments of the present application are described below with reference to the drawings.

Referring to fig. 1 and fig. 2 in combination, fig. 1 isbase:Sub>A schematic structural diagram of an electronic device 1000 provided in the present application, and fig. 2 isbase:Sub>A schematic sectional structural diagram of the electronic device 1000 shown in fig. 1 alongbase:Sub>A directionbase:Sub>A-base:Sub>A.

The electronic device 1000 includes, but is not limited to, a vehicle-mounted display, a television, an outdoor advertising display, a mobile phone, a computer, a tablet computer, and the like. In the embodiment of the present application, the electronic device 1000 is described as an example of an in-vehicle display. For convenience of description, a length direction of the electronic device 1000 is defined as a first direction X, a width direction of the electronic device 1000 is defined as a second direction Y, a thickness direction of the electronic device 1000 is defined as a third direction Z, and the first direction X, the second direction Y, and the third direction Z are vertically arranged in pairs.

The electronic apparatus 1000 may include a housing 400 and a display device 300, the display device 300 being mounted inside the housing 400. The display device 300 may include a display panel 200 and a side-in backlight module 100. The display panel 200 includes a display area 210 and a non-display area 220, and the non-display area 220 is disposed around the display area 210. The side-in backlight module 100 is disposed below the display panel 200 and is used for providing a light source for the display panel 200, so that the display device 300 has a good display effect. Illustratively, the Display panel 200 may be a Liquid Crystal Display (LCD).

In this embodiment, the lateral backlight module 100 may include a tape 10, a backlight housing 20, a reflective sheet 30, a light guide plate 40, a diffusion sheet 50, a lower prism sheet 60, an upper prism sheet 70, a plurality of light emitting devices 80, and a middle frame (bezel) 90, wherein the tape 10, the reflective sheet 30, the light guide plate 40, the diffusion sheet 50, the lower prism sheet 60, the upper prism sheet 70, the plurality of light emitting devices 80, and the middle frame 90 are all mounted on the backlight housing 20.

The backlight housing 20 is provided with a mounting groove 21, and the mounting groove 21 is positioned at the middle of the backlight housing 20. The opening of the mounting groove 21 is located at the top surface of the backlight housing 20. The mounting groove 21 is recessed from the top surface toward the bottom surface of the backlight housing 20. Wherein, the mounting groove 21 includes a groove bottom wall 211 and a groove side wall 212, and the groove side wall 212 is disposed around the groove bottom wall 211.

It should be understood that the terms "top," "bottom," and the like used in the description of the embodiments of the present application are primarily set forth in the orientation illustrated in fig. 2, with the "top" in the positive direction toward the Z-axis and the "bottom" in the negative direction toward the Z-axis, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the orientation of the embodiments of the present application in a practical application.

The adhesive tape 10, the reflective sheet 30, the light guide plate 40, the diffusion sheet 50, the lower prism sheet 60, the upper prism sheet 70, and the plurality of light emitting devices 80 are mounted in the mounting groove 21. Specifically, the reflective sheet 30, the light guide plate 40, the diffusion sheet 50, the lower prism sheet 60, the upper prism sheet 70, and the middle frame 90 are sequentially stacked on the groove bottom wall 211, and the plurality of light emitting devices 80 are all mounted on the groove side wall 212 and arranged at intervals in the second direction Y. The light emitting device 80 may be a light-emitting diode (LED) lamp bead.

The light guide plate 40 includes a light incident surface 41 and a light emitting surface 42, and the light incident surface 41 and the light emitting surface 42 are disposed adjacent to each other. The light incident surface 41 of the light guide plate 40 is a surface of the light guide plate 40 facing the light emitting devices 80, and is opposite to and spaced apart from the light emitting devices 80. The light emitting surface 42 of the light guide plate 40 is a surface of the light guide plate 40 away from the reflective sheet 30. Light rays emitted by the light emitting devices 80 can enter the light guide plate 40 from the light incident surface 41 of the light guide plate 40, the light guide plate 40 can guide the scattering direction of the light rays, and after a line light source emitted by the light emitting devices 80 is converted into a surface light source under the action of the light guide plate 40, the line light source is emitted to the display panel 200 from the light emitting surface 42 of the light guide plate 40, so that the light rays provided by the side-in backlight module 100 to the display panel 200 are uniform light rays, and the improvement of the display quality of the display device 300 is facilitated. The middle frame 90 can press the adhesive tape 10, the reflective sheet 30, the light guide plate 40, the diffusion sheet 50, the lower prism sheet 60 and the upper prism sheet 70 against the groove bottom wall 211 to ensure the assembly stability of the edge-type backlight module 100. Wherein the middle frame 90 is shaped like a Chinese character 'hui'. Illustratively, the middle frame 90 may be a rectangular iron frame. The middle frame 90 is provided with a light hole 91, and the light hole 91 penetrates through the middle frame 90 along the thickness direction of the middle frame 90. The light holes 91 are arranged corresponding to the display area 210 of the display panel 200, the edges of the light holes 91 are aligned with the edges of the display area 210, light can be emitted to the display panel 200 from the light holes 91, and the display panel 200 can operate normally.

Referring to fig. 2, fig. 3 and fig. 4 in combination, fig. 3 is a schematic structural diagram of an adhesive tape 10 in the electronic device 1000 shown in fig. 2 according to a first embodiment, and fig. 4 is a schematic plan structural diagram of the adhesive tape 10 shown in fig. 3.

The tape 10 comprises a first sub-tape 11, a second sub-tape 12 and a third sub-tape 13, wherein the third sub-tape 13 is fixedly connected between the first sub-tape 11 and the second sub-tape 12. The first sub tape 11, the second sub tape 12 and the third sub tape 13 may be integrally formed, or one end of the third sub tape 13 is adhered to the first sub tape 11, and the other end is adhered to the second sub tape 12, so that the first sub tape 11, the second sub tape 12 and the third sub tape 13 are connected into an integrated structure.

The first sub tape 11 is strip-shaped and extends along the first direction X. Specifically, the first sub tape 11 is adhered between the backlight housing 20 and the reflection sheet 30 to secure the assembly stability between the backlight housing 20 and the reflection sheet 30. The first sub tape 11 has a first adhesive surface (not shown) and a second adhesive surface (not shown), and the first adhesive surface and the second adhesive surface are opposite to each other in the third direction Z. Specifically, the first adhesive surface is adhered to the groove bottom wall 211 of the mounting groove 21, and the second adhesive surface is adhered to the bottom surface of the reflective sheet 30.

The second sub tape 12 is adhered between the light guide plate 40 and the reflective sheet 30. Specifically, the second sub-tape 12 is positioned between the edge of the light guide plate 40 adjacent to the light emitting device 80 and the edge of the reflective sheet 30 adjacent to the light emitting device 80. The second sub tape has a third bonding surface (not shown) and a fourth bonding surface (not shown), and the third bonding surface and the fourth bonding surface are opposite to each other in the third direction Z. Specifically, the third adhesive surface is adhered to the top surface of the reflective sheet 30, and the fourth adhesive surface is adhered to the bottom surface of the light guide plate 40.

In this embodiment, the second sub tape 12 includes a plurality of dot glue portions 121, and the plurality of dot glue portions 121 are sequentially arranged at intervals along the first direction X. Illustratively, the plurality of spot adhesive portions 121 are each rectangular. In other embodiments, the spot adhesive portion 121 may also be trapezoidal or circular, and the like, which is not specifically limited in this application.

It should be noted that, by disposing the plurality of spot adhesive portions 121 between the light guide plate 40 and the reflective sheet 30, the problem of light shadows or light spots caused by overlapping of the light emitting ranges of the light emitting devices 80 can be avoided, so that the light provided by the lateral backlight module 100 to the display panel 200 is more uniform, and the display effect of the display device 300 is improved.

It should be understood that the size of the light spot caused by the overlapping of the light emitting ranges between the adjacent light emitting devices 80 is generally influenced by the distance between the light emitting device 80 and the light guide plate 40, the distance between the adjacent two light emitting devices 80, and the like. Illustratively, the smaller the distance between the light emitting device 80 and the light guide plate 40 is, the smaller the distance between two adjacent light emitting devices 80 is, the larger the light spot is, and the larger the size of the spot adhesive portion 121 is required to be. Therefore, in order to ensure that the spot 121 can cover the light spot, the size of the spot 121 needs to be designed according to the distance between the light emitting device 80 and the light guide plate 40 and the distance between two adjacent light emitting devices 80.

Referring to fig. 2 and 5, fig. 5 is a simplified structural diagram of the dot adhesive portion 121, the reflective sheet 30 and the light emitting device 80 of the adhesive tape 10 in the electronic device 1000 shown in fig. 2.

In the present embodiment, along the first direction X, the distance from the light emitting surface of the light emitting device 80 to the light incident surface 41 of the light guide plate 40 is L ₁ . In the first direction X, a distance between two adjacent light emitting devices 80 is L ₂ Each light emitting device has a length L ₅ Length l of each dot portion 121 ₁ The distance between two adjacent spot-like glue parts 121 is l ₃ . The light emission angle of the light emitting device 80 is 2 θ ₁ . In the first direction X, the length l of each dot portion 121 ₁ ＝L ₂ -2×(L ₁ ×tanθ ₁ ) Distance l between two adjacent spot-like adhesive parts 121 ₃ ＝L ₅ +2×(L ₁ ×tanθ ₁ )。

In this embodiment, the width of the dispensing portion 121 needs to be limited to a size range that cannot be observed by human eyes, so as to ensure that the display effect of the display device 300 is better. Specifically, the distance from the surface of the reflection sheet 30 to the bottom surface of the middle frame 90 along the third direction Z is L ₃ . Along the first direction X, the width of each dot portion 121 is l ₂ The distance from the light incident surface 41 of the light guide plate 40 to the edge of the light transmission hole 91 of the middle frame 90 is L ₄ . The angle between the line connecting the bottom of the hole wall of the light hole 91 and the end of the spot adhesive part 121 far away from the light incident surface 41 of the light guide plate 40 and the bottom of the middle frame 90 is an observable angle, and the observable angle is theta ₂ . In the first direction X, the width l of each dot portion 121 ₂ ＝L ₄ -(L ₃ /tanθ ₂ )。

The dimensional design formula of the spot adhesive portion 121 described in this embodiment is similarly applied to the dimensional design of the spot adhesive portion 121 in the other embodiments, unless otherwise conflicting.

Please continue to refer to fig. 3 and 4. In the present embodiment, the plurality of spot adhesive portions 121 include a first spot adhesive portion 122 and a plurality of second spot adhesive portions 123. The first spot adhesive portion 122 is a spot adhesive tape located at an intermediate position among the plurality of spot adhesive portions 121 in the first direction X. In the first direction X, a part of the second dispensing portion 123 is located on one side of the first dispensing portion 122, and a part of the second dispensing portion 123 is located on the other side of the first dispensing portion 122. In the first direction X, the length of the first dispensing portion 122 is greater than the length of the second dispensing portion 123, and the lengths of the second dispensing portions 123 are equal. In other embodiments, the lengths of the second spot glue portions 123 may be different. It should be noted that, in the side-in backlight module 100, the light guide plate 40 generally needs to be positioned by using the positioning posts, the positioning posts are often disposed in the middle of the light guide plate 40, the positioning posts generate large light spots, and the first spot-shaped adhesive portions 122 can also cover the light spots generated by the positioning posts, so as to ensure that the light brightness of the visible area of the display device 300 is the same and uniform.

Referring to fig. 2 and 6, fig. 6 is a schematic structural view of the adhesive tape 10 shown in fig. 3 in an unfolded state.

In this embodiment, one end of the third sub tape 13 is fixedly connected to the edge of the first sub tape 11, and the other end is fixedly connected to the second sub tape 12. The third sub-tape 13 has a fifth adhesive surface (not shown). Specifically, the fifth adhesive surface is attached to a side of the reflective sheet 30 adjacent to the light emitting device 80. In some other embodiments, the third sub-tape 13 may further include a sixth bonding surface (not shown), and the sixth bonding surface is disposed opposite to the fifth bonding surface.

The third sub-tape 13 includes a plurality of sub-tape portions 131, and each sub-tape portion 131 is fixedly connected between the first sub-tape 11 and one spot-like adhesive portion 121. The plurality of sub-adhesive tape portions 131 are disposed at intervals along the first direction X. In the first direction X, the length of each sub tape portion 131 is equal to the length of the dot adhesive portion 121 connected thereto. In the present embodiment, the number of sub tape portions 131 is the same as the number of spot adhesive portions 121. In other embodiments, the number of sub tape portions 131 may be different from the number of dot adhesive portions 121, and the embodiments of the present application are not limited thereto. Illustratively, one sub-tape portion 131 may connect a plurality of spot adhesives 121, or a plurality of sub-tape portions 131 may connect one spot adhesive 121.

In the present embodiment, the plurality of sub tape portions 131 includes a first sub tape portion 132 and a plurality of second sub tape portions 133. The first sub-tape portion 132 is fixedly connected between the first sub-tape 11 and the first spot-like adhesive portion 122, and each second sub-tape portion 133 is fixedly connected between the first sub-tape 11 and one second spot-like adhesive portion 123. In the first direction X, the length of the first sub-tape portion 132 is equal to the length of the first spot-like adhesive portion 122, and the length of the second sub-tape portion 133 is equal to the length of the second spot-like adhesive portion 123.

In the present embodiment, the adhesive tape 10 is in an unfolded state before being assembled to the side-in type backlight module 100, as shown in fig. 6. When assembling the side-in type backlight module 100, the first sub-tape 11 of the tape 10 may be adhered to the bottom surface of the reflective sheet 30, the third sub-tape 13 is bent relative to the first sub-tape 11 to be adhered to the side surface of the reflective sheet, the second sub-tape 12 is bent relative to the third sub-tape 13 to be adhered to the top surface of the reflective sheet 30, and then the reflective sheet 30 is assembled with the backlight housing 20 and the light guide plate 40.

It can be understood that, by providing the third sub-tape 13 and connecting the third sub-tape 13 with the first sub-tape 11 and the second sub-tape 12, on one hand, the first sub-tape 11, the second sub-tape 12 and the third sub-tape 13 can be connected into an integrated structure; on the other hand, the plurality of spot adhesive portions 121 of the second sub tape 12 are prevented from drifting due to the influence of air flow, moisture, and the like, and white spots are prevented from being generated on the display panel 200, thereby ensuring a good display effect of the display device 300.

Referring to fig. 7, 8 and 9 in combination, fig. 7 is a schematic structural diagram of an adhesive tape 10 in the electronic device 1000 shown in fig. 2 according to a second embodiment, fig. 8 is a schematic plan structural diagram of the adhesive tape 10 shown in fig. 7, and fig. 9 is a schematic diagram of the adhesive tape 10 shown in fig. 7 in an unfolded state.

The tape 10 of the present embodiment is different from the tape 10 of the first embodiment in that the length of each sub tape portion 131 along the first direction X is smaller than the length of the point adhesive portion 121 connected thereto. Specifically, one end of the sub tape portion 131 is connected to the first sub tape 11, and the other end is connected to the middle position of the dispensing portion 121. Wherein, one end of the first sub-tape portion 132 is connected to the first sub-tape 11, and the other end is connected to the middle portion of the first dispensing portion 122; one end of each second sub tape portion 133 is connected to the first sub tape 11, and the other end is connected to the middle of one second dot adhesive portion 123. In the present embodiment, in the first direction X, the length of the first sub tape portion 132 is smaller than the length of the first spot adhesive portion 122, and the length of the second sub tape portion 133 is smaller than the length of the second spot adhesive portion 123, so as to increase the flexibility of the third sub tape 13, facilitate the spot adhesive portion 121 to be bent relative to the first sub tape 11 to be adhered to the reflective sheet 30, enable the tape 10 to be well adhered to the surface of the reflective sheet 30, and improve the assembling strength of the tape 10 and the reflective sheet 30.

Referring to fig. 10, 11 and 12 in combination, fig. 10 is a schematic structural view of an adhesive tape 10 in the electronic device shown in fig. 2 according to a third embodiment, fig. 11 is a schematic structural view of the adhesive tape shown in fig. 10 in a plan view, and fig. 12 is a schematic structural view of the adhesive tape 10 shown in fig. 10 in an unfolded state.

The adhesive tape 10 of the present embodiment is different from the adhesive tape 10 of the first embodiment in that the first sub-adhesive tape 11 includes a plurality of strip-shaped adhesive portions 111, and the plurality of strip-shaped adhesive portions 111 are provided at intervals in the first direction X. Each strip-shaped adhesive part 111 extends along the second direction Y. Each strip-shaped adhesive portion 111 is connected to one end of one sub-adhesive tape portion 131 far from the point-shaped adhesive portion 121. In the first direction X, the length of the strip-shaped adhesive part 111 is equal to the length of the sub-adhesive tape part 131 connected thereto. In the present embodiment, the number of the stripe-shaped adhesive portions 111 is the same as the number of the dot-shaped adhesive portions 121, and is also the same as the number of the sub tape portions 131.

In the present embodiment, the plurality of strip-shaped adhesive portions 111 includes a first strip-shaped adhesive tape 112 and a plurality of second strip-shaped adhesive tapes 113. The first strip-shaped adhesive tape 112 is a strip-shaped adhesive tape located at a middle position in the plurality of strip-shaped adhesive parts 111 in the first direction X. In the first direction X, a portion of the second strip-shaped adhesive tape 113 is located on one side of the first strip-shaped adhesive tape 112, and a portion of the second strip-shaped adhesive tape 113 is located on the other side of the second strip-shaped adhesive tape. In the first direction X, the length of the first strip-shaped tape 112 is greater than the length of the second strip-shaped tape 113, and the lengths of the second strip-shaped tapes 113 are equal. In other embodiments, the lengths of the second strips 113 may be different.

In this embodiment, the first stripe 112 is connected to one end of the first sub tape portion 132 away from the first dispensing portion 122, and one second stripe 113 is connected to one end of the second sub tape portion 133 away from the second dispensing portion 123. In the first direction X, the length of the first strip-shaped tape 112 is equal to the length of the first sub-tape portion 132 connected thereto and also equal to the length of the first spot-shaped tape portion 122; the length of the second strip 113 is equal to the length of the second sub-adhesive tape 133 connected thereto and also equal to the length of the second spot adhesive portion 123.

In the present embodiment, by providing the plurality of strip-shaped adhesive portions 111 and arranging the plurality of strip-shaped adhesive portions 111 at intervals along the first direction X, on one hand, the lengths of the strip-shaped adhesive portions 111, the dot-shaped adhesive portions 121 and the sub-adhesive tape portions 131 are equal in the first direction X, so that the adhesive tape 10 is in a long strip shape before being assembled, and is convenient to be adhered to the reflective sheet 30, thereby simplifying the installation process; on the other hand, when the external environment temperature changes rapidly, the gap between two adjacent strip-shaped adhesive portions 111 can buffer the external acting force applied to the reflective sheet 30, and avoid the wrinkle of the reflective sheet 30 caused by the mismatch of the thermal expansion coefficients between the films of the side-in type backlight module 100, thereby preventing the spot-shaped adhesive portions 121 from drifting due to the wrinkle of the reflective sheet 30, avoiding the white spots appearing on the display panel 200, and further ensuring the good display effect of the display device 300.

Referring to fig. 13, 14 and 15 in combination, fig. 13 is a schematic structural view of an adhesive tape 10 in the electronic device shown in fig. 2 according to a fourth embodiment, fig. 14 is a schematic structural view of the adhesive tape 10 shown in fig. 13 in a plan view, and fig. 15 is a schematic structural view of the adhesive tape 10 shown in fig. 13 in an unfolded state.

The adhesive tape 10 shown in this embodiment is different from the adhesive tape 10 shown in the third embodiment in that the length of each strip-shaped adhesive part 111 in the first direction X is greater than the length of the sub-adhesive tape part 131 connected thereto and is equal to the length of each dot-shaped adhesive part 121. Specifically, one end of one sub-adhesive tape portion 131 is connected to the middle of one strip-shaped adhesive portion 111, and the other end is connected to the middle of one dot-shaped adhesive portion 121. Wherein, one end of the first sub-tape portion 132 is connected to the middle of the first strip-shaped tape 112, and the other end is connected to the middle of the first dispensing portion 122; one end of each second sub-tape portion 133 is connected to the middle of a second strip-shaped tape 113, and the other end is connected to the middle of a second dot-shaped tape portion 123. In the present embodiment, in the first direction X, the length of the first strip 112 is greater than the length of the first sub tape portion 132 and equal to the length of the first spot-shaped adhesive portion 122; the length of the second strip 113 is greater than the length of the second sub tape portion 133 and equal to the length of the second spot adhesive portion 123. This arrangement can increase the flexibility of the third sub-tape 13, so that the point adhesive portion 121 can be bent relative to the first sub-tape 11 to be attached to the reflective sheet 30.

Referring to fig. 16, 17 and 18 in combination, fig. 16 is a schematic structural diagram of an adhesive tape 10 in the electronic device shown in fig. 2 according to a fifth embodiment, fig. 17 is a schematic structural diagram of the adhesive tape 10 shown in fig. 16 in a plan view, and fig. 18 is a schematic structural diagram of the adhesive tape shown in fig. 16 in an unfolded state.

The adhesive tape 10 shown in this embodiment is different from the adhesive tape 10 shown in the first embodiment described above in that the first sub-tape 11 includes a first portion 114 and a plurality of second portions 115. In the first direction X, the first portion 114 is located at a middle position of the first sub tape 11. The first portion 114 extends in a first direction X. In the first direction X, a plurality of second portions 115 are arranged at intervals; a portion of the second portion 115 is located on one side of the first portion 114 and a portion of the second portion 115 is located on the other side of the first portion 114. Each second portion 115 extends in the second direction Y. In the first direction X, the lengths of the first portions 114 are all greater than the lengths of the second portions 115, and the lengths of the second portions 115 are equal. In some other embodiments, the lengths of the plurality of second portions 115 may also be unequal.

In the present embodiment, the plurality of sub-tape portions 131 includes a plurality of first tape portions 134 and a plurality of second tape portions 135. Each first tape portion 134 is fixedly attached between the first portion 114 and one of the spot gum portions 121 and each second tape portion 135 is fixedly attached between one of the second portions 115 and one of the spot gum portions 121. The plurality of first tape parts 134 include the first sub tape parts 132 and the partial second sub tape parts 133 in the above embodiment, and the plurality of second tape parts 135 include the partial second sub tape parts 133 in the above embodiment.

In the first direction X, the length of the first tape portions 134 is less than that of the first portion 114, and the length of each first tape portion 134 is equal to that of the point-like adhesive portions 121 connected thereto; the length of the second tape portions 135 is equal to the length of the second portion 115 connected thereto, and the length of each second tape portion 135 is equal to the length of the dot gum portions 121 connected thereto.

In the present embodiment, by providing the first portion 114 and the plurality of second portions 115, on one hand, the first portion 114 can stably bond the backlight housing 20 and the reflective sheet 30 to ensure the assembling stability between the backlight housing 20 and the reflective sheet 30; on the other hand, when the external environment temperature changes rapidly, the gap between the first portion 114 and the second portion 115 and the gap between two adjacent second portions 115 can buffer the external acting force applied to the reflective sheet 30, so as to avoid the wrinkle of the reflective sheet 30 caused by the mismatch of the thermal expansion coefficients between the films of the lateral backlight module 100, thereby preventing the drift of the point adhesive part 121 due to the wrinkle of the reflective sheet 30, avoiding the white spot on the display panel 200, and further ensuring the good display effect of the display device 300.

Referring to fig. 19, 20, and 21 in combination, fig. 19 is a schematic structural diagram of an electronic device shown in fig. 2, where the adhesive tape 10 is in a sixth implementation manner, fig. 20 is a schematic structural diagram of a plane of the adhesive tape 10 shown in fig. 19, and fig. 21 is a schematic structural diagram of the adhesive tape shown in fig. 19 in an unfolded state.

The adhesive tape 10 of the present embodiment is different from the adhesive tape 10 of the fifth embodiment in that the length of each sub-tape portion 131 in the first direction X is smaller than the length of the point adhesive portion 121 connected thereto. Specifically, one end of each first tape portion 134 is connected to the first portion 114, and the other end is connected to the middle of one spot adhesive portion 121; each second tape portion 135 has one end connected to a middle portion of one second portion 115 and the other end connected to a middle portion of one spot adhesive portion 121. In the present embodiment, in the first direction X, the length of each first tape portion 134 is smaller than the length of the point-like adhesive portion 121 connected thereto; the length of each second adhesive tape portion 135 is less than the length of the spot adhesive portion 121 connected thereto. This arrangement can increase the flexibility of the third sub-tape 13, so that the point adhesive portion 121 can be bent relative to the first sub-tape 11 to be attached to the reflective sheet 30.

The application provides a lateral backlight unit 100, through setting up the sub-sticky tape 13 of third, connect into the structure of integral type with sub-sticky tape 11 of first and second 12 to prevent that sub-sticky tape 12 of second from receiving the influence emergence drift of steam, air current etc. thereby avoid appearing the white spot on the display panel 200, guarantee that display device 300's visual region's light luminance is the same and the distribution is even.

On the basis, on one hand, the length of the third sub-adhesive tape 13 along the first direction X is reduced to increase the flexibility of the third sub-adhesive tape 13, so that the second sub-adhesive tape 12 is easier to bend relative to the first sub-adhesive tape 11, thereby facilitating the adhesive tape 10 to be adhered to the surface of the reflective sheet 30; on the other hand, the structure of the first sub tape 11 is changed to avoid the wrinkles of the reflective sheet 30, so as to prevent the second sub tape 12 from drifting due to the wrinkles of the reflective sheet 30, further avoid the white spots on the display panel 200, and ensure the good display effect of the display device 300.

The above embodiments and embodiments of the present application are only examples and embodiments, and the scope of the present application is not limited thereto, and any person skilled in the art can easily think of the changes or substitutions within the technical scope of the present application, and all the changes or substitutions should be covered within the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims (15)

1. A side-in type backlight module is characterized by comprising an adhesive tape, a backlight shell, a reflector plate, a light guide plate and a plurality of light-emitting devices, wherein the backlight shell is provided with a mounting groove, the mounting groove comprises a groove bottom wall and a groove side wall, the groove side wall is arranged around the groove bottom wall, the plurality of light-emitting devices are all mounted on the groove side wall and are arranged at intervals along a first direction, the reflector plate is stacked on the groove bottom wall, the light guide plate is stacked on one side of the reflector plate, which is deviated from the groove bottom wall, and a light incident surface of the light guide plate is arranged at intervals and opposite to the plurality of light-emitting devices;

the adhesive tape comprises a first sub adhesive tape, a second sub adhesive tape and a third sub adhesive tape, the first sub adhesive tape is adhered between the bottom wall of the groove and the reflector plate, the second sub adhesive tape comprises a plurality of point-shaped adhesive parts, the point-shaped adhesive parts are adhered between the light guide plate and the reflector plate and are arranged at intervals along the first direction, and the third sub adhesive tape is fixedly connected between the first sub adhesive tape and the point-shaped adhesive parts and is adhered to the surface of the reflector plate facing the plurality of light-emitting devices.

2. The lateral backlight module of claim 1, wherein the first sub-tape, the second sub-tape and the third sub-tape are integrally formed.

3. The edge-type backlight module of claim 1, wherein the third sub-tape comprises a plurality of sub-tape portions, each of the plurality of sub-tape portions is adhered to a surface of the reflective sheet facing the plurality of light emitting devices and is spaced along the first direction, and each of the plurality of sub-tape portions is fixedly connected between the first sub-tape and one of the dot-shaped adhesive portions.

4. The edge-type backlight module of claim 3, wherein the sub-adhesive tape portions each have a length equal to a length of the dot adhesive portions connected thereto along the first direction.

5. The edge-type backlight module of claim 3, wherein the sub-adhesive tape portions each have a length less than the length of the dot adhesive portions connected thereto along the first direction.

6. The edge-type backlight module of claim 5, wherein one end of each sub-tape portion is fixedly connected to the first sub-tape, and the other end of each sub-tape portion is fixedly connected to a middle portion of one of the dot-shaped adhesive portions.

7. The edge-type backlight module of any one of claims 3 to 6, wherein the first sub-tape comprises a plurality of adhesive stripe portions, and the adhesive stripe portions are adhered between the bottom wall of the groove and the reflective sheet and are arranged at intervals along the first direction;

each sub adhesive tape part is fixedly connected between one strip adhesive part and one spot adhesive part.

8. The edge-type backlight module of any of claims 3-6, wherein the first sub-tape comprises a first portion and a plurality of second portions, the first portion and the plurality of second portions are adhered between the bottom wall of the groove and the reflective sheet and are spaced apart along the first direction, and the length of the first portion is greater than the length of the second portion along the first direction;

the plurality of sub adhesive tape portions comprise a plurality of first adhesive tape portions and a plurality of second adhesive tape portions, each first adhesive tape portion is fixedly connected between one first portion and one dot-shaped adhesive portion, and each second adhesive tape portion is fixedly connected between one second portion and one dot-shaped adhesive portion.

9. The edge-lit backlight module of claim 1, further comprising a middle frame, wherein the middle frame is stacked on a side of the reflector plate facing away from the bottom wall of the groove, and the middle frame is provided with a light hole penetrating through the middle frame in a thickness direction of the middle frame;

along the first direction, the length of each point-shaped adhesive part is l ₁ The distance between two adjacent spot-shaped adhesive parts is l ₃ Each of the light emitting devices has a length L ₅ The distance between two adjacent light-emitting devices is L ₂ Along the second direction, the width of each point-like glue part is l ₂ The distance between the light emitting surface of the light emitting device and the light incident surface of the light guide plate is L ₁ The distance between the light incident surface of the light guide plate and the hole wall of the light hole is L ₄ The light of the light-emitting device has an emission angle of 2 theta ₁ Observable angle is theta ₂ The length l of each point-like adhesive part along the first direction ₁ ＝L ₂ -2×(L ₁ ×tanθ ₁ ) Along the second direction, the width l of each point-shaped adhesive part ₂ ＝L ₄ -(L ₃ /tanθ ₂ )。

10. The edge-type backlight module of claim 9, wherein a distance/' between two adjacent spot-shaped adhesive portions along the first direction ₃ ＝L ₅ +2×(L ₁ ×tanθ ₁ )。

11. The edge-type backlight module of claim 1, wherein the plurality of spot-like adhesive portions comprise a first spot-like adhesive portion and a plurality of second spot-like adhesive portions, a length of the first spot-like adhesive portion is greater than a length of the second spot-like adhesive portion along the first direction, and the first spot-like adhesive portion is disposed opposite to the positioning posts of the light guide plate.

12. The edge-type backlight module of claim 11, wherein in the first direction, the first dispensing portion is located at a middle position of the dispensing portions, a portion of the second dispensing portion is located at one side of the first dispensing portion, and a portion of the second dispensing portion is located at the other side of the first dispensing portion.

13. The edge-lit backlight module of claim 1, further comprising a diffuser sheet, a lower prism sheet, and an upper prism sheet, wherein the diffuser sheet, the lower prism sheet, and the upper prism sheet are sequentially stacked on a side of the light guide plate facing away from the reflector sheet.

14. A display device, comprising a display panel and the side-in backlight module of claims 1-13, wherein the side-in backlight module is disposed below the display panel.

15. An electronic apparatus characterized by comprising a housing and the display device according to claim 14, the display device being mounted inside the housing.

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