CN210488196U - Backlight module, display screen, terminal and optical film material - Google Patents

Abstract

The embodiment of the utility model provides an in backlight module, display screen, terminal and optical film material, backlight module includes side-emitting LED light source and light guide plate, is provided with the light condensing film that the terminal surface is flushed on the light guide plate, and one of light condensing film upper surface and lower surface is the prism face, and another is non-prism face; the top of the LED light source is provided with a shading strip, and the surface of the shading strip, which is the same with the non-prism surface, is a connecting surface. The shading that still is provided with the single face among the backlight unit and glues, through the bonding face that the shading was glued non-prism face and connection face to it is fixed to realize being connected of shading strip and collecting film, and then for the backlight unit that adopts collecting film such as terminal surfaces such as reverse prism membrane flush provides the scheme that sets up of shading adhesive tape, has avoided the problem that the light that the LED light source sent is from its top to see through, has promoted the display effect of display screen.

Description

Backlight module, display screen, terminal and optical film material

Technical Field

The utility model relates to a show the field, especially relate to a backlight unit, display screen, terminal and optical film material.

Background

In some conventional backlight modules, the diffusion sheet may extend out of one section compared to the upper prism sheet and the lower prism sheet, as shown in fig. 1: thus, the portion of the diffusion sheet 11 protruding out can form a support step for supporting and fixing the light-shielding black stripes 12: one side of the shading black strip 12 is fixedly arranged on the supporting step, the other side of the shading black strip is arranged at the top of the LED light source 13, the effect of preventing light emitted by the LED light source 13 from penetrating out of the top of the shading black strip can be achieved, and the problem that a user perceives light from an area outside a display area of the terminal display screen to influence the visual experience of the user is avoided. However, in the future, the diffusion sheet 11, the upper prism sheet 14, and the lower prism sheet 15 are uniformly implemented by an inverse prism sheet, the inverse prism sheet is an integrally formed optical film material, and the end surfaces of the inverse prism sheet are flush, so that a supporting step for supporting and fixing the black shading strip cannot be provided continuously, and thus the black shading strip cannot be arranged in the backlight module, light emitted by the LED light source is easily transmitted from the top of the backlight module, and a user sees light leakage from a display area of the terminal, which affects user experience.

SUMMERY OF THE UTILITY MODEL

The embodiment of the utility model provides a backlight unit, display screen, terminal and optical film material, the main technical problem who solves is: when the backlight module adopts the optical film material with the flush end surface to replace the upper prism sheet, the lower prism sheet and the diffusion sheet which are respectively separated, the shading black strip cannot be fixedly arranged in the backlight module, and the LED light source light of the lead easily leaks from the top of the LED light source to influence the visual experience of the terminal.

In order to solve the above technical problem, an embodiment of the present invention provides a backlight module, including a side-emitting LED light source and a light guide plate disposed on a light-emitting side of the LED light source, wherein a light-gathering film with a flush end surface is disposed on the light guide plate, the light-gathering film has functions of a diffuser and a prism sheet, and one of an upper surface and a lower surface of the light-gathering film is a prism surface, and the other is a non-prism surface; the top of the LED light source is provided with a shading strip for preventing the light emitted by the LED light source from penetrating out of the top of the LED light source, and the surface of the shading strip on the same side with the non-prism surface is a connecting surface; the backlight module further comprises a bonding adhesive tape, the bonding adhesive tape is single-sided adhesive, and a bonding surface of the bonding adhesive tape is adhered to the non-prism surface and the connecting surface and connected with the light-gathering film and the shading strip.

Optionally, the light-condensing film is a reverse prism film, and the non-prism surface is an upper surface of the reverse prism film.

Optionally, the light-gathering film is a composite film, and the composite film is formed by compounding an upper prism sheet, a lower prism sheet and a diffusion sheet which are sequentially arranged from top to bottom; the non-prism surface is the lower surface of the composite film.

Optionally, the color of the adhesive strip is black.

Optionally, one side of the light shielding bar facing the LED light source is black.

Optionally, the length of a first bonding area between the bonding adhesive tape and the light shielding strip along a first direction is greater than or equal to 0.2mm, and is less than or equal to the length of the light shielding strip along the first direction, and the first direction is the light emitting direction of the LED light source.

Optionally, the length of a second bonding area between the bonding adhesive tape and the light-gathering film along a first direction is greater than or equal to 0.2mm and less than or equal to 1.2mm, and the first direction is the light-emitting direction of the LED light source.

The embodiment of the utility model provides a still provide a display screen, including above arbitrary item backlight unit and liquid crystal display panel, liquid crystal display panel sets up on the spotlight membrane.

The embodiment of the utility model provides a still provide a terminal, including above-mentioned display screen.

The embodiment of the utility model provides an optical film material is still provided, including the condensation membrane, set up in the shading strip of condensation membrane side and bond the condensation membrane with the bonding adhesive tape of shading strip, the condensation membrane possesses the effect of diffusion piece and prism piece simultaneously, the condensation membrane that its terminal surface is leveled, and one of its upper surface and lower surface is the prism face, and the other is non-prism face; the surface of the shading strip, which is on the same side with the non-prism surface, is a connecting surface; the adhesive tape is a single-sided adhesive, and the adhesive surface of the adhesive tape is adhered to the non-prism surface and the connecting surface.

The utility model has the advantages that:

in the backlight module, the display screen, the terminal and the optical film provided by the embodiment of the utility model, the backlight module comprises a side-lighting LED light source and a light guide plate arranged on the light-emitting side surface of the LED light source, a light-gathering film with flush end surface is arranged on the light guide plate, one of the upper surface and the lower surface of the light-gathering film is a prism surface, and the other is a non-prism surface; the top of the LED light source is provided with a shading strip for preventing the light emitted by the LED light source from penetrating out of the top of the LED light source, and the surface of the shading strip on the same side with the non-prism surface is a connecting surface. Still be provided with the shading that the single face was glued among the backlight unit and glue, glue non-prism face and connection face through the bonding face that the shading was glued, thereby realize that the connection of shading strip and collecting film is fixed, make even if adopt the terminal surface to flush the collecting film to replace the last prism piece of separation separately, during lower prism piece and diffusion piece, the fixed and connection of shading strip also there is not the problem, and then for the backlight unit that adopts the collecting film that terminal surfaces such as reverse prism membrane flushed provides the setting scheme of shading adhesive tape, the problem of light that the LED light source sent from its top is passed through has been avoided, the display effect of display screen has been promoted, end user's visual experience has been strengthened.

Other features and corresponding advantages of the invention are set forth in the following part of the specification, and it is to be understood that at least some of the advantages become apparent from the description of the invention.

Drawings

Fig. 1 is a schematic cross-sectional view of a backlight module provided in the background art;

fig. 2 is a schematic cross-sectional view illustrating a backlight module according to a first embodiment of the present invention;

fig. 3 is a schematic cross-sectional view of another backlight module according to a first embodiment of the present invention;

fig. 4 is a schematic structural diagram of a composite membrane provided in a first embodiment of the present invention;

fig. 5 is a schematic structural diagram of an inverse prism film provided in a first embodiment of the present invention;

fig. 6 is a schematic diagram illustrating the bonding of the light-shielding strip and the adhesive tape according to the first embodiment of the present invention;

fig. 7 is a schematic diagram illustrating bonding between the light-gathering film and the adhesive tape according to a first embodiment of the present invention;

fig. 8 is a top view of an optical film material according to a second embodiment of the present invention;

fig. 9 is a top view of another optical film provided in the second embodiment of the present invention;

FIG. 10 is a schematic cross-sectional view of the optical film taken along line A-A' of FIG. 8;

fig. 11 is a flowchart of a method for manufacturing an optical film according to a second embodiment of the present invention;

fig. 12 is a schematic cross-sectional view of a display screen according to a third embodiment of the present invention.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the embodiments of the present invention are described in further detail below with reference to the accompanying drawings by way of specific embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

The first embodiment is as follows:

in order to solve the backlight unit in the prior art when adopting light-gathering films such as the contrary prism membrane, because the terminal surface flushes, can't provide the support step that is used for setting up black strip of shading, lead to the unable setting of black strip of shading, cause the light that the LED light source sent to spill from its top, influence user visual experience's problem, this embodiment provides a backlight unit, please refer to a section structure schematic diagram of the backlight unit of fig. 2 output:

the backlight module 20 includes an LED light source 21 and a light guide plate 22, wherein the LED light source 21 is a side-emitting LED, and therefore, the light guide plate 22 is disposed on the light-emitting side of the LED light source 21, for example, in fig. 2, the LED light source 21 is located on the left side, and the light guide plate 22 is disposed on the right side of the LED light source 21, and the light emitted from the LED light source 21 enters the light guide plate 22 from the end surface on the left side of the light guide plate 22, and then is emitted from the light-emitting surface on the top surface of the light guide plate 22 under the action of a reflective film (not shown in.

In this embodiment, the backlight module 20 further includes a light-gathering film 23 disposed on the light guide plate 22, and the light-gathering film 23 can perform the function of gathering and increasing the light emitted from the light-emitting surface of the light guide plate 22, but at the same time, the light-gathering film 23 can also realize the function of homogenizing the light, so the light-gathering film 23 has the functions of a prism sheet and a diffusion sheet. It should be noted that, in the related art, the functions of condensing, brightening and uniformizing light can also be achieved by the upper prism sheet, the lower prism sheet and the diffusion sheet, however, in the related art, the upper prism sheet, the lower prism sheet and the diffusion sheet are independent from each other, and the condensing film in this embodiment is only one film, not three films. Therefore, the condensing film 23 has two surfaces, one of which is a prism surface and the other is a non-prism surface:

for example, in some examples of the backlight module 20, the light-gathering film 23 may have a prism surface on the upper surface and a non-prism surface on the lower surface, for example, in the backlight module 20 shown in fig. 3, the light-gathering film 23 is a composite film composed of an upper prism sheet, a lower prism sheet and a diffusion sheet arranged in sequence from top to bottom. Fig. 4 shows a schematic structural diagram of a composite film 40 composed of an upper prism sheet 41, a lower prism sheet 42, and a diffusion sheet 43 arranged in this order from top to bottom. Alternatively, when the upper prism sheet, the lower prism sheet, and the diffusion sheet are combined, an intermediate connection medium, such as a double-sided tape, a UV (UV glue) tape, or the like, may be used between the different devices. In one example, the upper prism sheet and the lower prism sheet, and the lower prism sheet and the diffusion sheet may be combined together by disposing a double-sided tape or a UV tape between the two sheets and then applying pressure. In other examples of this embodiment, two adjacent double-sided tapes or UV tapes may be used to bond the two adjacent double-sided tapes or UV tapes, and then the pressing is performed, after the two are combined, the double-sided tapes or UV tapes are used to bond the third double-sided tapes or UV tapes, and the pressing is performed to obtain the composite film.

In other examples, the light-gathering film 23 may have a non-prism surface on the upper surface and a prism surface on the lower surface. Such as the reverse prism film employed in fig. 2. This is explained below in conjunction with the schematic structural view of the inverse prism film shown in fig. 5:

the inverse Prism film 50 includes a matte layer (mat layer)51, a PET (polyethylene terephthalate resin) layer 52, and a Prism (Prism) layer 53 in this order from top to bottom, so that the upper surface of the matte layer 51 is a non-Prism surface of the inverse Prism film 50, and the lower surface of the Prism layer 53 is a Prism surface of the inverse Prism film 50. In fig. 2, the light-condensing film 23 is directly disposed on the light guide plate 22, and therefore, the prisms on the lower surface of the inverse prism film directly contact the light guide plate 22, so that the light guided out from the light guide plate 22 can be emitted from the upper surface of the inverse prism film along the vertical direction, and thus, the brightness of the backlight module 20 can be effectively enhanced, and the effective utilization rate of the light can be improved. Generally, the inverse prism film is adopted to replace an upper prism sheet, a lower prism sheet and a diffusion sheet which are separated in the prior art, so that the brightness of the backlight module can be improved by more than 30%, and the power consumption of the backlight module is effectively reduced.

As can be seen from fig. 4 and 5, the non-prism surface in this embodiment may be a smooth flat surface or a matte surface.

In this embodiment, the LED light source 21 is a side-emitting LED, and therefore, the area at the top of the LED light source 21 itself does not participate in the display, and therefore, under normal conditions, it should be ensured that no light is emitted from the top of the LED light source 21, if there is a light leak in the non-display area of the display screen, which may affect the visual experience of the user, in order to solve this problem, the backlight module 20 provided in this embodiment further includes a light shielding strip 24. As the name implies, the shading strip 24 should have a shading effect, i.e. an effect of preventing light from passing from one surface thereof to the other. The light shielding strip is disposed above the LED light source 21 in this embodiment, and is used to prevent the light emitted from the LED light source 21 from passing through the top of the LED light source 21. It is understood that the light-shielding bars 24 and the light-condensing film 23 are both horizontally disposed, so that the light-shielding bars 24 can divide a space into an upper side and a lower side, and the light-condensing film 23 can also divide a space into an upper side and a lower side. The light-condensing film 23 is disposed on the upper surface of the light guide plate 22, and the light-shielding bars are disposed above the LED light sources 21, so that the light-shielding bars 24 and the light-condensing film 23 are generally located at almost the same level. In the present embodiment, according to the distribution of the prism surface and the non-prism surface of the condensing film 23, one surface of the light shielding bar 24 on the same side as the non-prism surface of the condensing film 23 is referred to as a "connection surface": for example, if the upper surface of the condensing film 23 is a non-prism surface, the upper surface of the light-shielding bars 24 is a connection surface; if the lower surface of the condensing film 23 is a non-prism surface, the lower surface of the light-shielding bar 24 is a connection surface.

Considering that the end surface of the condensing film 23 is flush, therefore, the side of the condensing film 23 close to the LED light source 21 cannot provide a supporting step for the light shielding strip 23 to perform a fixing and supporting function, so as to solve the problem of fixing and connecting the light shielding strip 24, the backlight module 20 provided in this embodiment further includes a bonding adhesive tape 25 therein, only one of two surfaces of the bonding adhesive tape 25 in this embodiment is glued as a bonding surface, that is, the bonding adhesive tape 25 is glued as a single surface. However, in other examples of the present embodiment, the adhesive tape 25 may be a double-sided tape in the present embodiment, the adhesive surface of the adhesive tape 25 is simultaneously adhered to the non-prism surface of the light-gathering film 23 and the connecting surface of the light-shielding strip 24, so as to connect the light-gathering film 23 and the light-shielding strip 24. For example, in fig. 2, the non-prism surface of the light-condensing film 23 is the upper surface thereof, and therefore the connection surface of the light-shielding bar 24 is also the upper surface thereof, and naturally, the bonding surface of the bonding tape 25 is the lower surface thereof, the bonding tape 25 is positioned above the light-condensing film 23 and the light-shielding bar 24, and the bonding surface of the bonding tape 25 is bonded to the upper surface of the light-shielding bar 24 and the upper surface of the light-condensing film 23. In fig. 3, the non-prism surface of the light-condensing film 23 is the lower surface thereof, and therefore the connection surface of the light-shielding bar 24 is also the lower surface thereof, so the adhesion surface of the adhesive tape 25 is the upper surface thereof, the adhesive tape 25 is positioned below and above the light-condensing film 23 and the light-shielding bar 24, and the adhesion surface of the adhesive tape 25 is adhered to the lower surface of the light-shielding bar 24 and the lower surface of the light-condensing film 23.

Through this kind of bonding mode, realized the connection and the fixed of light-shielding strip 24, provide the scheme that sets up the light-shielding strip for the backlight unit that adopts the terminal surfaces such as inverse prism membrane to flush the spotlight membrane.

It can be understood that, in theory, two end faces of the light shielding strip 24 and the light condensing film 23 adjacent to each other may contact each other, so that no gap exists between the light shielding strip 24 and the light condensing film 23, and thus, the light emitted by the LED light source 21 under the light shielding strip 24 may be prevented from passing through the gap between the light shielding strip 24 and the light condensing film 23, however, in the actual process, on the basis of ensuring that the light shielding strip 24 and the light condensing film 23 do not overlap, the gap between the light shielding strip 24 and the light condensing film 23 cannot be eliminated. Therefore, in the present embodiment, in order to prevent the light emitted from the LED light source 21 from passing through the gap between the light-shielding strip 24 and the light-condensing film 23, the adhesive tape 25 used in the backlight module 20 may be a light-shielding tape having a light-shielding effect, such as black. In fig. 2, the adhesive strip 25 is black, however, in other examples, the adhesive strip 25 may be other colors, and even the upper and lower surfaces of the adhesive strip 25 may have different colors, for example, in one example, the upper surface of the adhesive strip 25 is black and the lower surface is silver, so that the lower surface can reflect the light of the LED light source 21.

Considering that the adhesive tape 25 only needs to realize the adhesion between the connection surface of the light shielding strip 24 and the non-prism surface of the light condensing film 23, in this embodiment, only one surface of the adhesive tape 25 is an adhesive surface, that is, the adhesive tape 25 may be a single-sided adhesive. In other examples of this embodiment, the adhesive strip 25 may be double-sided tape.

In the present embodiment, in order to ensure the reliability of the adhesion between the adhesive tape 25 and the light shielding bar 24, the length d1 of the first adhesion area between the adhesive tape 25 and the light shielding bar 24 in the first direction may be required to be 0.2mm or more. Meanwhile, in order to avoid the adhesive tape 25 from being too large and not supported beyond the light shielding strip 24, the length of the light shielding strip in the first direction, which is the light outgoing direction of the LED light source 21, is required to be d1 or less. For example, fig. 6 shows a schematic view of the adhesion between the adhesive strip 25 and the shade strip 24: since the light emitting direction of the LED light source 21 is horizontal to the right, the length of the light shielding bar along the first direction is L1, and therefore, d1 is more than or equal to 0.2mm and less than or equal to L1. In some examples of this embodiment, d1 may also: d1 is more than or equal to 0.3mm and less than or equal to L1.

In order to ensure the reliability of the adhesion between the adhesive tape 25 and the light-condensing film 23, the length d2 of the second adhesion area between the adhesive tape 25 and the light-condensing film 23 in the first direction may be required to be 0.2mm or more, as shown in fig. 7. Meanwhile, in order to avoid the adhesive tape 25 from excessively shielding the light-gathering film 23, the value of d2 should not be too large, and in some examples of the embodiment, the value of d1 is 0.2mm or more and 1.2mm or less. In one example of the present embodiment, the length of the second adhesive region between the adhesive tape 25 and the condensing film 23 in the first direction is 0.2mm, and in another example of the present embodiment, the length of the second adhesive region between the adhesive tape 25 and the condensing film 23 in the first direction is 1.2 mm. Optionally, 0.3mm ≦ d1 ≦ 1.0mm in some examples of the present embodiment.

The backlight unit that this embodiment provided utilizes the adhesive tape, bonds light shading strip and spotlight membrane, realizes the fixed connection of light shading strip to realize the setting of light shading strip under the condition that spotlight membrane terminal surface flushes, avoided not setting up light shading strip and leaded to the light that the LED light source sent to see through from its top, influence display screen display effect, reduce user's visual experience's problem.

Example two:

it can be understood that the connection among the light-gathering film, the light-shading strip and the adhesive tape in the backlight module can be completed in advance to form an integral optical film material. In the main and standby stages of the backlight module, the optical film material which is prepared in advance is directly adopted, and the temporary bonding in the preparation stage of the backlight module is not needed.

For example, a top view of an optical film is shown in FIG. 8: the optical film material 80 includes a condensing film 81, a light shielding strip 82, and an adhesive tape 83, and in fig. 8, the condensing film 81 may be a reverse prism film because the upper surface of the condensing film 81 is a non-prism surface.

FIG. 9 shows a top view of another optical film: the optical film 90 includes a light-condensing film 91, a light-shielding strip 92, and an adhesive strip 93, and in fig. 9, the adhesive strip 93 is located below the light-condensing film 91 and the light-shielding strip 92, and the lower surface of the light-condensing film 91 is a non-prism surface, so the light-condensing film 91 may be a composite film.

Next, taking the optical film material in fig. 8 as an example, fig. 10 shows a cross-sectional view of the optical film material 80 cut along a-a' in fig. 8, wherein the optical film material 80 is cut in a longitudinal direction, and as can be seen from fig. 10, the end surface of the light-condensing film 81 is flush, the upper surface thereof is a non-prism surface, and the lower surface thereof is a prism surface, so that the adhesive tape 83 is adhered to the upper surfaces of the light-condensing film 81 and the light-shielding bars 82.

It can be understood that, when the optical film material of fig. 8 or 9 is prepared, the bonding process may be performed in units of backlight modules, that is, a light-gathering film and a light-shielding strip for the backlight module are obtained in advance, and then the light-gathering film and the light-shielding strip are bonded by using a light-shielding adhesive tape, so as to obtain the optical film material of the backlight module. For example, the condensing film and the light-shielding bars are laid on the workbench, and the light-shielding bars are positioned on the side surfaces of the condensing film, and meanwhile, the non-prism surface of the condensing film is ensured to face upwards. And then, bonding the non-prism surface of the light-gathering film coil stock and the upper surface of the shading strip by using a bonding adhesive tape to obtain a bonded coil stock.

It is needless to say that according to the scheme, the light condensing film and the light shielding strip of each backlight module need to be bonded independently, the efficiency is low, and the indirect area among the bonding adhesive tape, the light shielding strip and the light condensing film is small due to the fact that the size of the light shielding strip is small, so that the bonding difficulty is very high, and the rejection rate is high. In view of the above, the present embodiment also provides another scheme for preparing an optical film, please refer to the flowchart shown in fig. 11:

s1102: flatly paving a condensing film coil material and a shading strip coil material on a workbench, wherein the shading strip coil material is positioned on the side surface of the condensing film coil material, and the non-prism surface of the condensing film coil material and the connecting surface of the shading strip coil material are both upward;

s1104: bonding the non-prism surface of the light-gathering film coil material and the upper surface of the shading strip by using a bonding adhesive tape to obtain a bonded coil material;

s1106: and punching the bonding coil material according to a preset specification to obtain the optical film material with the end face of the light-gathering film being flush.

It is understood that if the upper and lower surfaces of the shade strip web are identical without distinction, it is not necessary to distinguish which surface is the connecting surface at the stage of preparing the optical film material, because either one of the two surfaces can be used as the connecting surface. However, if the upper and lower surfaces of the roll of gobos are different, and the different surfaces have different functions, for example, one surface is silver and the other surface is black, the connection surface needs to be determined according to the orientation of the non-prism surface of the condensing film in the backlight module: if the light-gathering film is a reverse prism film, the non-prism surface faces upward in the backlight module. In this case, the surface of the light shielding strip roll as the connecting surface is naturally upward in the backlight module, and therefore, the black surface of the light shielding strip roll should be used as the connecting surface, and the silver surface of the light shielding strip roll should be facing the LED light source.

The predetermined specification is a dimension requirement of an optical film material formed by the light-condensing film and the light-shielding strip in the backlight module.

According to the optical film material and the preparation method thereof, before the backlight module is prepared, the whole optical film material can be prepared, so that the process of temporarily adhering the light condensing film and the light shading strip in the backlight module is avoided, and the assembly difficulty of the backlight module is reduced. Furthermore, when the optical film material is prepared, the condensing film roll material and the shading strip roll material can be bonded, and then cutting is carried out after bonding is completed, so that batch preparation of the optical film material is realized, the bonding difficulty in the preparation process of the optical film material is reduced, and the preparation efficiency is favorably improved.

Example three:

the present embodiment provides a display panel, which includes the optical film material provided in the second embodiment. Optionally, in some examples of this embodiment, the display screen includes the backlight module provided in the first embodiment, please refer to a schematic cross-sectional structure diagram of the display screen shown in fig. 12:

the display 12 includes a backlight module 120 and a liquid crystal panel 121, wherein the liquid crystal panel 121 is disposed on a light emitting surface of the backlight module 120, and the liquid crystal panel 121 can display different images by lighting the backlight module 120.

It is understood that, in other examples of the present embodiment, the backlight module 120 may be the backlight module described in the first embodiment. It is understood that the backlight module 120 may include a reflective film and an outer frame (e.g., an iron frame or a plastic-iron frame) in addition to the LED light source, the light guide plate, the light-gathering film, the light-shielding strip, and the adhesive tape.

The embodiment also provides a terminal, which comprises the backlight module provided in any one of the above examples. The terminal may be implemented in various forms. For example, the terminal described in the present embodiment may include a mobile terminal such as a mobile phone, a tablet computer, a notebook computer, a palmtop computer, a Personal Digital Assistant (PDA), a Portable Media Player (PMP), a navigation device, a wearable device, a smart band, a pedometer, and the like, and a fixed terminal such as a Digital TV, a desktop computer, and the like.

The foregoing is a more detailed description of embodiments of the present invention, and the specific embodiments are not to be considered in a limiting sense. To the utility model belongs to the technical field of ordinary technical personnel, do not deviate from the utility model discloses under the prerequisite of design, can also make a plurality of simple deductions or replacement, all should regard as belonging to the utility model discloses a protection scope.

Claims (10)

1. A backlight module is characterized by comprising a side-emitting LED light source and a light guide plate arranged on the light-emitting side surface of the LED light source, wherein a light-condensing film with a flush end surface is arranged on the light guide plate, the light-condensing film has the functions of a diffusion sheet and a prism sheet, one of the upper surface and the lower surface of the light-condensing film is a prism surface, and the other surface of the light-condensing film is a non-prism surface; the top of the LED light source is provided with a shading strip for preventing the light emitted by the LED light source from penetrating out of the top of the LED light source, and the surface of the shading strip on the same side with the non-prism surface is a connecting surface; the backlight module further comprises a bonding adhesive tape, the bonding adhesive tape is single-sided adhesive, and a bonding surface of the bonding adhesive tape is adhered to the non-prism surface and the connecting surface and connected with the light-gathering film and the shading strip.

2. The backlight module according to claim 1, wherein the light-collecting film is a reverse prism film, and the non-prism surface is an upper surface of the reverse prism film.

3. The backlight module as claimed in claim 1, wherein the light-condensing film is a composite film composed of an upper prism sheet, a lower prism sheet, and a diffusion sheet arranged in sequence from top to bottom; the non-prism surface is the lower surface of the composite film.

4. A backlight module according to any one of claims 1-3, wherein the adhesive strip is black in color.

5. The backlight module according to any one of claims 1-3, wherein the side of the light-shielding bars facing the LED light sources is black.

6. The backlight module according to any of claims 1-3, wherein the length of the first bonding region between the adhesive tape and the light-shielding strip along a first direction is greater than or equal to 0.2mm and less than or equal to the length of the light-shielding strip along the first direction, and the first direction is the light-emitting direction of the LED light source.

7. The backlight module according to any one of claims 1 to 3, wherein a length of the second bonding region between the adhesive tape and the light-collecting film along a first direction is greater than or equal to 0.2mm and less than or equal to 1.2mm, and the first direction is a light-emitting direction of the LED light source.

8. A display screen, comprising the backlight module as claimed in any one of claims 1 to 7 and a liquid crystal panel, wherein the liquid crystal panel is disposed on the light-condensing film.

9. A terminal characterized by comprising a display screen according to claim 8.

10. An optical film material is characterized by comprising a light-gathering film, a shading strip arranged on the side surface of the light-gathering film and an adhesive tape for adhering the light-gathering film and the shading strip, wherein the light-gathering film has the functions of a diffusion sheet and a prism sheet, the end surface of the light-gathering film is flush with the end surface of the light-gathering film, one of the upper surface and the lower surface of the light-gathering film is a prism surface, and the other surface of the light-gathering film is a non-prism surface; the surface of the shading strip, which is on the same side with the non-prism surface, is a connecting surface; the adhesive tape is a single-sided adhesive, and the adhesive surface of the adhesive tape is adhered to the non-prism surface and the connecting surface.

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