CN112242092A - Backlight module, display panel and preparation method of backlight module - Google Patents
Backlight module, display panel and preparation method of backlight module Download PDFInfo
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- CN112242092A CN112242092A CN201910645970.XA CN201910645970A CN112242092A CN 112242092 A CN112242092 A CN 112242092A CN 201910645970 A CN201910645970 A CN 201910645970A CN 112242092 A CN112242092 A CN 112242092A
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
- G09F9/00—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
- G02F1/1336—Illuminating devices
- G02F1/133602—Direct backlight
- G02F1/133606—Direct backlight including a specially adapted diffusing, scattering or light controlling members
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Abstract
The embodiment of the invention provides a backlight module, a display panel and a preparation method of the backlight module, wherein the backlight module comprises: lamp plate and range upon range of setting are in a plurality of glue films on the lamp plate, the lamp plate includes the base plate and distributes a plurality of illuminant on the base plate, a plurality of glue films include: a light diffusing layer overlying the plurality of point light sources; the diffusion layer is coated on one surface, away from the lamp panel, of the light diffusion layer; the correcting layer is coated on the surface, away from the light diffusion layer, of the diffusion layer and used for correcting the light rays output by the diffusion layer towards the normal direction of the light outlet surface of the correcting layer. According to the embodiment of the invention, the multilayer optical adhesive layer is arranged on one side of the lamp panel, so that the backlight module is thinned on the premise of not influencing the quality of the backlight module, and the effects of high brightness and narrow frame are achieved.
Description
Technical Field
The invention relates to the technical field of display, in particular to a backlight module, a display panel and a preparation method of the backlight module.
Background
With the development of science and technology, the requirements on backlight products are higher and higher; it is the current mainstream to require the backlight to achieve ultra-thin, high brightness and narrow frame. For the design of the ultra-thin and narrow frame of the backlight source, various new ways are developed, in the prior art, the backlight source is to be ultra-thin and is based on the existing structural thinning used members, and the narrow frame of the backlight source is realized based on the continuous reduction of the adhesive width of the adhesive tape.
Referring to fig. 1, a backlight of the prior art includes a light shielding adhesive a2, an upper prism b2, a lower prism c2, a diffuser d2, a lamp panel e2, and a frame f 1. It is obvious that the existing backlight source is assembled by a bearing frame, an optical film material, a light emitting source and an adhesive tape, the thickness of the product and the width of a frame are affected by the part material and the matching gap, the ultra-thin material and the ultra-narrow gap are adopted, and the adhesion area of the adhesive tape is reduced to achieve the effects of ultra-thin and narrow frames of the backlight source, so that the quality of the backlight source is unstable.
Disclosure of Invention
The invention provides a display device, which aims to solve the problem of unstable quality of a backlight module caused by the effect of narrow frame and ultrathin backlight source.
One aspect of the present invention provides a backlight module, including: lamp plate and range upon range of setting are in a plurality of glue films on the lamp plate, the lamp plate includes the base plate and distributes a plurality of pointolite on the base plate, a plurality of glue films include:
a light diffusing layer overlying the plurality of point light sources;
the diffusion layer is coated on one surface, away from the lamp panel, of the light diffusion layer;
the correcting layer is coated on the surface, away from the light diffusion layer, of the diffusion layer and used for correcting the light rays output by the diffusion layer towards the normal direction of the light outlet surface of the correcting layer.
Optionally, a plurality of protruding structures are arranged on one side of the light diffusion layer away from the lamp panel; the convex structures correspond to the point light sources one by one;
one side that protruding structure deviates from the lamp plate has the concave surface, the concave surface is used for with point light source launches extremely the light of the predetermined incident angle of concave surface carries out the total reflection.
Optionally, one surface of the substrate facing the light diffusion layer is a mirror reflection surface, and is used for reflecting the light totally reflected by the concave surface.
Optionally, a plurality of first rib structures are arranged in parallel on one side of the diffusion layer, which is away from the light diffusion layer.
Optionally, the correction layer includes a first correction sublayer and a second correction sublayer; the first correction sublayer is arranged on one side, away from the light diffusion layer, of the light diffusion layer; the second correction sublayer is arranged on the side, facing away from the diffusion layer, of the first correction sublayer;
the first correction sublayer is provided with a plurality of second ribbed structures in parallel along a first direction on one surface deviating from the diffusion layer; a plurality of third ridge structures are arranged on one surface of the second correction sublayer, which is far away from the first correction sublayer, in parallel along a second direction; the first direction is perpendicular to the second direction.
Optionally, the second correction sublayer has a plurality of fourth ribbed structures on a surface facing the first correction sublayer, and the fourth ribbed structures are matched with the second ribbed structures, and the refractive index of the second correction sublayer is smaller than that of the first correction sublayer.
Optionally, a surface of the second correction sublayer facing the first correction sublayer is a flat surface, and a cross-sectional shape of the second rib structure in a direction perpendicular to the second direction includes: triangular and trapezoidal shapes; the second rib structures in the triangular shape and the trapezoidal shape are arranged at intervals.
Optionally, on a plane formed by the first direction and the second direction, a first flattening area is disposed on the periphery of the second rib structure of the first correction sublayer, and a second flattening area is disposed on the periphery of the third rib structure of the second correction sublayer.
Optionally, a light shielding layer is disposed on a side surface surrounding the plurality of glue layers.
In another aspect, the present invention provides a display device including the backlight module as described in any one of the above paragraphs.
In another aspect of the present invention, a method for manufacturing a backlight module is provided, including:
provide the lamp plate, the lamp plate includes: the device comprises a substrate and a plurality of point light sources distributed on the substrate;
prepare a plurality of glue films on the lamp plate, include:
coating a light scattering layer on the lamp panel to enable the light scattering layer to cover the point light sources;
coating a diffusion layer on one side of the light diffusion layer, which is far away from the lamp panel;
and preparing a correction layer on one surface of the diffusion layer, which is far away from the light diffusion layer, wherein the correction layer is used for correcting the light output by the diffusion layer towards the normal direction of the light outlet surface of the correction layer.
Optionally, preparing a light diffusion layer on the lamp panel, so that the light diffusion layer covers the plurality of point light sources, includes:
coating a light diffusion layer glue on the substrate, and enabling the light diffusion layer glue to cover the point light sources;
pressing one side of the light diffusion layer glue, which is far away from the substrate, by using a first steel film, and curing to obtain a light diffusion layer; the side, facing the light diffusion layer glue, of the first steel film is provided with a plurality of concave structures, the concave structures correspond to the point light sources one by one, and one surface, facing the light diffusion layer, of each concave structure is provided with a convex surface; the concave structures enable one side, away from the substrate, of the light diffusion layer to form a plurality of convex structures, and the convex structures correspond to the point light sources one to one; the convex surface enables one side of the convex structure, which is far away from the substrate, to form a concave surface;
or;
forming a plurality of protruding structures on one side of the light scattering layer adhesive, which is away from the substrate, in a rolling manner, wherein the protruding structures correspond to the point light sources one to one; one side of the convex structure, which is far away from the substrate, is provided with a concave surface, and the concave surface is used for carrying out total reflection on the light rays with preset incident angles, which are emitted from the point light source to the concave surface;
and curing to obtain the light diffusion layer.
The embodiment of the invention provides a backlight module, which comprises: lamp plate and range upon range of setting are in a plurality of glue films on the lamp plate, the lamp plate includes the base plate and distributes a plurality of pointolite on the base plate, a plurality of glue films include: a light diffusing layer overlying the plurality of point light sources; the diffusion layer is coated on one surface, away from the lamp panel, of the light diffusion layer; the correcting layer is coated on the surface, away from the light diffusion layer, of the diffusion layer and used for correcting the light rays output by the diffusion layer towards the normal direction of the light outlet surface of the correcting layer. According to the embodiment of the invention, the multilayer optical adhesive layer is arranged on one side of the lamp panel, so that the backlight module is thinned on the premise of not influencing the quality of the backlight module, and the effects of high brightness and narrow frame are achieved.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the description of the embodiments of the present invention will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to these drawings without inventive labor.
Fig. 1 is a schematic structural diagram of a backlight module according to the prior art provided in an embodiment of the present invention;
fig. 2 is a schematic structural diagram of a backlight module according to an embodiment of the invention;
FIG. 3 is a schematic structural diagram of a light diffusion layer provided by an embodiment of the present invention;
FIG. 4 is a schematic structural diagram of a sub-light source according to an embodiment of the present invention;
FIG. 5 is a schematic structural diagram of a light path diagram of a light diffusion layer according to an embodiment of the present invention;
FIG. 6 is a schematic structural diagram of a diffusion layer according to an embodiment of the present invention;
FIG. 7 is a schematic structural diagram of a corrective layer according to an embodiment of the present invention;
FIG. 8 is a schematic diagram of a light path of a correction layer according to an embodiment of the present invention;
FIG. 9 is a schematic diagram of another corrective layer provided by an embodiment of the present invention;
FIG. 10 is a schematic diagram of the optical path of another corrective layer provided by an embodiment of the present invention;
FIG. 11 is a schematic structural diagram of another light-shielding layer according to an embodiment of the present invention;
FIG. 12 is a flowchart illustrating a method for manufacturing a backlight module according to an embodiment of the present invention;
FIG. 13 is a schematic view of a process for preparing a light diffusion layer according to an embodiment of the present invention;
FIG. 14 is a schematic view of a step of another method for manufacturing a light diffusion layer according to an embodiment of the present invention;
fig. 15 is a schematic structural diagram of a second rib structure according to an embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making an invasive task, are within the scope of the present invention.
Example one
Referring to fig. 2, illustrating a backlight module, an aspect of the present invention provides a backlight module, including: lamp plate 10 and range upon range of setting are in a plurality of glue films on the lamp plate 10, the lamp plate includes base plate 11 and distributes a plurality of point light sources 12 on the base plate 11, a plurality of glue films include:
a light diffusion layer 20 covering the plurality of point light sources 12;
a diffusion layer 30 coated on a side of the light diffusion layer 20 away from the lamp panel 10;
and the correcting layer 40 is coated on the surface of the diffusion layer 30, which is far away from the light diffusion layer 20, and the correcting layer 40 is used for correcting the light rays output by the diffusion layer 30 towards the normal direction of the light outlet surface of the correcting layer 40.
In the embodiment of the invention, the lamp panel mainly acts as a light distribution, and the substrate is used as a carrier of the whole point light source; due to the limitation of the light emitting angle of the point light source, the main energy of light is concentrated at a certain angle in the vertical direction of the lamp panel, so that the lamp space is dark, and the light diffusion layer is mainly used for enlarging the light emitting angle of the lamp; the diffusion layer has the function that when light meets a plurality of scattered particles in the diffusion layer, diffuse reflection occurs, so that the light of the picture is more uniform; the correcting layer 40 is used for correcting the light rays output by the diffusion layer 30 towards the normal direction of the light-emitting surface of the correcting layer 40, and the ultrathin, narrow-frame and high-brightness technical effects of the backlight module are finally achieved.
In the embodiment of the present invention, referring to fig. 2 and 3, a plurality of protruding structures 21 are disposed on a side of the light diffusion layer 20 away from the lamp panel 10; the convex structures 21 correspond to the point light sources 12 one to one.
Protruding structure 21 deviates from one side of lamp plate 10 has concave surface 211, concave surface 211 is used for with point light source 12 launches to the light of the preset incident angle of concave surface 211 carries out the total reflection.
In the embodiment of the present invention, a surface of the substrate 11 facing the light diffusion layer 20 is a mirror reflection surface, and is configured to reflect the light totally reflected by the concave surface 211.
In the embodiment of the present invention, referring to fig. 4, the luminous intensity distribution diagram of the point light source 12 is as shown in fig. 4, since the main light energy is concentrated in the positive direction of the point light source, a concave surface 211 is designed right above the point light source, so that part of the light in the main energy area of the point light source is totally reflected to compensate to the area with weak light intensity.
Referring to fig. 5, θ is a total reflection angle, light within the point light source angle α is transmitted to the concave surface 211 to be refracted and reflected, for example, the light ray a is refracted to form a refracted light ray a1 when entering the concave surface 211, and a reflected light ray a2 is generated, and air is filled in the pits corresponding to the concave surface 211, so that the a1 is scattered in the air due to the low refractive index of the air; the light rays within the angle β are incident on the surface of the light diffusion layer 20 away from the substrate, and are refracted and reflected continuously, because the incident angles are all larger than the total reflection angle θ, the light rays with the incident angles are totally reflected at the concave surface 211, such as the light rays b and the light rays c, and the light rays totally reflected at the concave surface 211 are incident on the specular reflection surface of the substrate 11, and are reflected again, so that the direction of the light rays is changed, and the light rays are supplied to the area with weaker light energy outside the main energy area of the point light source, and the light rays d within the angle γ. In summary, in the embodiment of the invention, the concave surface 211 is arranged to change the overall light intensity arrangement of the point light source.
In the embodiment of the invention, alpha, beta and gamma are adjusted by different point light source light intensity curves, (alpha is more than or equal to 0 degrees and less than or equal to 90 degrees (the curve with the functional surface 21a having a certain slope is represented by alpha being more than or equal to 0 degrees), beta is more than or equal to 0 degrees and less than or equal to 90 degrees, and gamma is more than or equal to 0 degrees and less than or equal to 90 degrees, wherein alpha is more than or equal to 90 degrees and gamma is the same as the case of gamma being more than or equal to.
The design of the values α, β, and γ is related to the light intensity distribution of the point light sources, the distance between the adjacent point light sources, the refractive index of the light scattering layer 20, and the like, and α is smaller when the light intensity distribution of the point light sources is concentrated in the 0 ° direction.
In the embodiment of the present invention, referring to fig. 6, a plurality of first rib structures 31 are arranged in parallel on a side of the diffusion layer 30 away from the light diffusion layer 20.
In an embodiment of the present invention, the corrective layer 40 includes a first corrective sublayer 41 and a second corrective sublayer 42; the first correction sublayer 41 is arranged on the side of the diffusion layer 30 facing away from the diffusion layer 20; the second correction sublayer 42 is arranged on the side of the first correction sublayer 41 facing away from the diffusion layer 30.
In the embodiment of the present invention, the diffusion layer 30 is mixed with diffusion particles including: polymethyl methacrylate or polybutyl methacrylate, etc.;
the diffusion particles mainly have the function that the concave-convex surfaces on the surfaces of the diffusion particles can enable incident light rays to be folded and dispersed, and the light diffusion effect is achieved.
Further, the refractive index of the diffusion layer 30 is smaller than that of the diffusion layer 20.
In the embodiment of the invention, the first rib structure is arranged on the light-emitting surface of the diffusion layer 30, and part of scattered light in random directions can be recovered in the vertical direction, so that the use of a lower prism can be reduced, the thickness of the backlight module is reduced, and the ultrathin effect is realized.
In the embodiment of the present invention, referring to fig. 1, a plurality of second rib structures 411 are arranged in parallel along a first direction X on a surface of the first correction sublayer 41 facing away from the diffusion layer 30; a plurality of third ridge structures 421 are arranged in parallel along a second direction Y on one surface of the second correction sublayer 42, which is far away from the first correction sublayer 41; the first direction X is perpendicular to the second direction Y.
In the embodiment of the present invention, referring to fig. 7, the second correction sublayer 42 has a plurality of fourth rib structures 422 on a surface facing the first correction sublayer 41, and the fourth rib structures 422 are matched with the second rib structures 411, and the refractive index of the second correction sublayer 42 is smaller than that of the first correction sublayer 41.
Referring to fig. 7, the lower surface of the fourth rib structure 422 is in contact with the upper surface of the second rib structure 411, so that the refractive index of the second correction sub-layer 42 is smaller than that of the first correction sub-layer 41 to ensure the light to be corrected in the third direction Z.
Referring to fig. 8, for the transmission of light in the second rib structure 411, for example, the light e enters the first correction sublayer 41, and is corrected to the normal direction of the light-emitting surface of the first correction sublayer 41 under the correction of the second rib structure 411. The principle of the light correction at the second correction sublayer 42 is as shown in fig. 8, and is not described herein again.
In an embodiment of the present invention, referring to fig. 9, a surface of the second correction sublayer 42 facing the first correction sublayer 41 is a flat surface, and a cross-sectional shape of the second ribbed structure 411 in the direction perpendicular to the second direction Y includes: a triangular shape 4111 and a trapezoidal shape 4112; the second rib structures of the triangle shape 4111 and the trapezoid shape 4112 are arranged at intervals.
When the surface of the second correction sublayer 42 facing the first correction sublayer 41 is flat, the second ribbed structure 411 is in contact with an air layer, and the refractive index of the air layer is smaller than that of the first correction sublayer 41, so the refractive indices of the first correction sublayer 41 and the second correction sublayer 42 are not limited herein.
In the embodiment of the present invention, since the second rib structures 411 are compressed if the surface of the second correction sublayer 42 facing the first correction sublayer 41 is a flat surface during the manufacturing process, the height of the second rib structures is made to be high and low intervals during the manufacturing process, so that the higher second rib structures are pressed into a trapezoid by the second correction sublayer 42, and the lower rib structures keep the original shape, as shown in fig. 9 (b).
In the embodiment of the present invention, referring to fig. 10, as shown in fig. (a), the cross-sectional shape of the second rib structure 411 is triangular, so that light can be well corrected towards the normal direction of the correction layer; as shown in fig. b, when the cross-sectional shape of the second rib structure 411 is a trapezoid, when light enters the upper surface of the trapezoid, the light almost cannot approach the upper surface in the normal direction, and the correction effect cannot be achieved.
In the embodiment of the present invention, referring to fig. 11, on a plane formed by the first direction X and the second direction Y, a first leveling area (not shown in the figure) is disposed at a periphery of the second rib structure 411 of the first correction sublayer 41, and a second leveling area 423 is disposed at a periphery of the third rib structure 421 of the second correction sublayer 42.
The first leveling area and the second leveling area are the same and are arranged at the periphery of the second rib structure, so that the backlight module is prevented from being influenced by foreign matters entering from the concave surface of the rib structure during glue injection in the preparation process.
In the embodiment of the present invention, referring to fig. 11, a light shielding layer 50 is disposed on a side surface surrounding the plurality of adhesive layers.
In the embodiment of the present invention, the light shielding layer 50 is to avoid light leakage caused by light emitted from the side edge, and the light shielding layer may be prepared by ink jet, adhesive tape, glue injection, coating, etc., and preferably has a white color to avoid light loss. The light-shielding layer mainly functions to block the propagation of light, and may absorb light (the incident surface of the light-shielding layer is black) or reflect light (the incident surface of the light-shielding layer is white).
In another aspect, the present invention provides a display device including the backlight module as described in any one of the above paragraphs.
The embodiment of the invention provides a backlight module, which comprises: lamp plate and range upon range of setting are in a plurality of glue films on the lamp plate, the lamp plate includes the base plate and distributes a plurality of pointolite on the base plate, a plurality of glue films include: a light diffusing layer overlying the plurality of point light sources; the diffusion layer is coated on one surface, away from the lamp panel, of the light diffusion layer; the correcting layer is coated on the surface, away from the light diffusion layer, of the diffusion layer and used for correcting the light rays output by the diffusion layer towards the normal direction of the light outlet surface of the correcting layer. According to the embodiment of the invention, the multilayer optical adhesive layer is arranged on one side of the lamp panel, so that the backlight module is thinned on the premise of not influencing the quality of the backlight module, and the effects of high brightness and narrow frame are achieved.
Example two
Referring to fig. 12, a flowchart illustrating steps of a method for manufacturing a backlight module according to an embodiment of the invention is shown; the preparation method specifically comprises the following steps:
in another aspect of the present invention, a method for manufacturing a backlight module is provided, including:
The lamp panel mainly serves as a light distribution function, and the substrate serves as a carrier of the whole point light source.
Wherein, prepare a plurality of glue films on the lamp plate, specifically include following step:
In the embodiment of the invention, the diffusion layer is mainly used for enlarging the light emitting angle of the lamp.
Referring to fig. 13 and 14, step 202 includes:
coating a light diffusion layer glue on the substrate, and enabling the light diffusion layer glue to cover the point light sources;
pressing one side of the light diffusion layer glue, which is far away from the substrate, by using a first steel film, and curing to obtain a light diffusion layer; the side, facing the light diffusion layer glue, of the first steel film is provided with a plurality of concave structures, the concave structures correspond to the point light sources one by one, and one surface, facing the light diffusion layer, of each concave structure is provided with a convex surface; the concave structures enable one side, away from the substrate, of the light diffusion layer to form a plurality of convex structures, and the convex structures correspond to the point light sources one to one; the convex surface enables one side of the convex structure, which is far away from the substrate, to form a concave surface;
or;
forming a plurality of protruding structures on one side of the light scattering layer adhesive, which is away from the substrate, in a rolling manner, wherein the protruding structures correspond to the point light sources one to one; one side of the convex structure, which is far away from the substrate, is provided with a concave surface, and the concave surface is used for carrying out total reflection on the light rays with preset incident angles, which are emitted from the point light source to the concave surface;
and curing to obtain the light diffusion layer.
In the embodiment of the present invention, referring to fig. 13, in step (a), a light diffusion layer adhesive is coated on a lamp panel, in step (b), the light diffusion layer adhesive is leveled, in step (c), a first steel film is placed on the light diffusion layer adhesive to obtain a light diffusion layer, in step (d), the light diffusion layer is cured, and in step (e), the excess light diffusion layer adhesive is cut to obtain a final light diffusion layer.
Referring to fig. 14, the step (c) in fig. 13 may be replaced by the step (d) in fig. 14, and a rolling manner is adopted to prepare the diffusion layer, and other steps are similar to those in fig. 13 and are not described again.
And 203, coating a diffusion layer on one surface of the light diffusion layer, which is far away from the lamp panel.
In the embodiment of the present invention, the diffusion layer is prepared in a manner similar to that of the diffusion layer, a diffusion layer adhesive is coated, a steel film is used for the diffusion layer adhesive to obtain a first rib structure, and then the diffusion layer is cured, which is not described herein again.
And 204, preparing a correction layer on one surface of the diffusion layer, which is far away from the light diffusion layer, wherein the correction layer is used for correcting the light output by the diffusion layer towards the normal direction of the light outlet surface of the correction layer.
In the embodiment of the invention, the overall preparation process is as follows: 1) coating a light scattering layer adhesive on the lamp panel, molding and curing; 2) coating diffusion layer glue on the diffusion layer, molding and curing; 3) coating a first correction sub-layer adhesive on the diffusion layer, molding and curing; 4) coating a second correction sublayer adhesive on the first correction sublayer, molding and curing; 5) cutting; 6) and preparing a shading layer.
In an embodiment of the present invention, step 204 includes: preparing a first correction sublayer, and arranging a plurality of second ribbed structures on the first surface of the first correction sublayer in parallel along a first direction; injecting second correction sublayer glue on the first surface of the first correction sublayer, so that one surface, facing the first correction sublayer, of the second correction sublayer glue is provided with a plurality of fourth rib structures matched with the second rib structures; forming a plurality of third ridge structures which are arranged in parallel along a second direction on one surface of the second correction sub-layer adhesive, which is far away from the first correction sub-layer; wherein the second direction is perpendicular to the first direction.
In an embodiment of the present invention, the structure of the corrective layer prepared by the above steps is shown in fig. 7.
In another embodiment of the present invention, step 204 includes: preparing a first correction sublayer on one side of the diffusion layer, which is far away from the diffusion layer, so that a plurality of second ribbed structures are arranged on the first surface of the first correction sublayer in parallel along a first direction, wherein the height of each second ribbed structure along a third direction comprises: the first height and the second height are arranged at intervals; preparing a second correcting sublayer, wherein one surface of the second correcting sublayer is a flat surface, and a plurality of third ridge structures are arranged on the other surface, opposite to the flat surface, of the second correcting sublayer in parallel along a second direction; placing the second correction sublayer on the first correction sublayer, and facing a flat surface of the second correction sublayer to the second ribbed structure of the first correction sublayer, so that a cross-sectional shape of the second ribbed structure in a direction perpendicular to the second direction includes: triangular and trapezoidal shapes; the triangular and trapezoidal second rib structures are arranged at intervals; wherein the first direction is perpendicular to the second direction; the third direction is perpendicular to the first direction and the second direction, respectively.
In the embodiment of the present invention, the structure of the corrective layer prepared by the above steps is shown in fig. 9.
Referring to fig. 15, the first height is higher than the second height by h, wherein h can be determined according to the material and quality of the second correction sublayer, so as to ensure that the cross-sectional shape of the second ribbed structure at the second height is kept in a triangular shape when the second correction sublayer is placed on the first correction sublayer.
The embodiment of the invention provides a preparation method of a backlight module, which comprises the following steps: provide the lamp plate, the lamp plate includes: the device comprises a substrate and a plurality of point light sources distributed on the substrate; preparing a light diffusion layer on the lamp panel, and enabling the light diffusion layer to cover the plurality of point light sources; preparing a diffusion layer on one side of the light diffusion layer, which is far away from the lamp panel; and preparing a correction layer on one surface of the diffusion layer, which is far away from the light diffusion layer, wherein the correction layer is used for correcting the light output by the diffusion layer towards the normal direction of the light outlet surface of the correction layer. According to the embodiment of the invention, the multilayer optical adhesive layer is arranged on one side of the lamp panel, so that the backlight module is thinned on the premise of not influencing the quality of the backlight module, and the effects of high brightness and narrow frame are achieved.
It is clear to those skilled in the art that, for convenience and brevity of description, the specific working processes of the above-described systems, apparatuses and units may refer to the corresponding processes in the foregoing method embodiments, and are not described herein again.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.
The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present invention, and all the changes or substitutions should be covered within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (12)
1. A backlight module, comprising: lamp plate and range upon range of setting are in a plurality of glue films on the lamp plate, the lamp plate includes the base plate and distributes a plurality of illuminant on the base plate, a plurality of glue films include:
a light diffusing layer overlying the plurality of point light sources;
the diffusion layer is coated on one surface, away from the lamp panel, of the light diffusion layer;
the correcting layer is coated on the surface, away from the light diffusion layer, of the diffusion layer and used for correcting the light rays output by the diffusion layer towards the normal direction of the light outlet surface of the correcting layer.
2. The backlight module as claimed in claim 1, wherein a plurality of protruding structures are disposed on a side of the light diffusion layer facing away from the lamp panel; the convex structures correspond to the point light sources one by one;
the convex structure deviates from one side of the lamp panel is provided with a concave surface, and the concave surface is used for emitting the point light source to the light rays with the preset incident angle of the concave surface to be totally reflected.
3. The backlight module as claimed in claim 2, wherein a surface of the substrate facing the light diffusion layer is a specular reflection surface for reflecting the light totally reflected by the concave surface.
4. The backlight module as claimed in claim 1, wherein a side of the diffusion layer facing away from the light diffusion layer is juxtaposed with a plurality of first rib structures.
5. The backlight module according to claim 1, wherein the correction layer comprises a first correction sublayer and a second correction sublayer; the first correction sublayer is arranged on one side, away from the light diffusion layer, of the light diffusion layer; the second correction sublayer is arranged on one side, facing away from the diffusion layer, of the first correction sublayer;
the first correction sublayer is provided with a plurality of second ribbed structures in parallel along a first direction on one surface deviating from the diffusion layer; a plurality of third ridge structures are arranged on one surface of the second correction sublayer, which is far away from the first correction sublayer, in parallel along a second direction; the first direction is perpendicular to the second direction.
6. The backlight module as claimed in claim 5, wherein the second correction sublayer has a plurality of fourth rib structures on a surface facing the first correction sublayer, and the fourth rib structures are matched with the second rib structures, and the refractive index of the second correction sublayer is smaller than that of the first correction sublayer.
7. The backlight module according to claim 5, wherein a surface of the second correcting sublayer facing the first correcting sublayer is a flat surface, and a cross-sectional shape of the second rib structure in a direction perpendicular to the second direction comprises: triangular and trapezoidal shapes; the second rib structures in the triangular shape and the trapezoidal shape are arranged at intervals.
8. A backlight module according to claim 5, wherein a first flattening area is disposed around the second rib structures of the first correction sublayer, and a second flattening area is disposed around the third rib structures of the second correction sublayer, in a plane formed by the first direction and the second direction.
9. The backlight module according to any one of claims 1 to 8, wherein a light shielding layer is disposed on a side surface surrounding the plurality of adhesive layers.
10. A display device comprising the backlight module according to any one of claims 1 to 9.
11. A method for manufacturing a backlight module is characterized by comprising the following steps:
provide the lamp plate, the lamp plate includes: the device comprises a substrate and a plurality of point light sources distributed on the substrate;
prepare a plurality of glue films on the lamp plate, include:
coating a light scattering layer on the lamp panel to enable the light scattering layer to cover the point light sources;
coating a diffusion layer on one side of the light diffusion layer, which is far away from the lamp panel;
and preparing a correction layer on one surface of the diffusion layer, which is far away from the light diffusion layer, wherein the correction layer is used for correcting the light output by the diffusion layer towards the normal direction of the light outlet surface of the correction layer.
12. The method of claim 11, wherein preparing a diffuser layer on the lamp panel such that the diffuser layer covers the plurality of point light sources comprises:
coating a light diffusion layer glue on the substrate, and enabling the light diffusion layer glue to cover the point light sources;
pressing one side of the light diffusion layer glue, which is far away from the substrate, by using a first steel film, and curing to obtain a light diffusion layer; the side, facing the light diffusion layer glue, of the first steel film is provided with a plurality of concave structures, the concave structures correspond to the point light sources one by one, and the surface, facing the light diffusion layer, of each concave structure is provided with a convex surface; the concave structures enable one side, away from the substrate, of the light diffusion layer to form a plurality of convex structures, and the convex structures correspond to the point light sources one to one; the convex surface enables one side of the convex structure, which is far away from the substrate, to form a concave surface;
or;
forming a plurality of protruding structures on one side of the light scattering layer glue, which is away from the substrate, in a rolling manner, wherein the protruding structures correspond to the point light sources one to one; one side of the convex structure, which is far away from the substrate, is provided with a concave surface, and the concave surface is used for carrying out total reflection on the light rays with preset incident angles, which are emitted from the point light source to the concave surface;
and curing to obtain the light diffusion layer.
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| CN201910645970.XA CN112242092A (en) | 2019-07-17 | 2019-07-17 | Backlight module, display panel and preparation method of backlight module |
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| CN201910645970.XA CN112242092A (en) | 2019-07-17 | 2019-07-17 | Backlight module, display panel and preparation method of backlight module |
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Citations (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TW200540462A (en) * | 2004-06-11 | 2005-12-16 | Hannstar Display Corp | Flat display panel |
| CN101625477A (en) * | 2008-07-07 | 2010-01-13 | 东丽世韩有限公司 | Optical sheet for tft-lcd back light unit and liquid crystal display having the optical sheet |
| CN101639181A (en) * | 2009-08-07 | 2010-02-03 | 广东昭信光电科技有限公司 | Direct type backlighting system |
| CN101696777A (en) * | 2009-10-22 | 2010-04-21 | 华东师范大学 | High-reliability white light LED plane light source module |
| CN202886632U (en) * | 2012-09-24 | 2013-04-17 | 惠州市粤泰翔科技有限公司 | Light diffuser plate for backlight display device |
| CN103345011A (en) * | 2013-06-28 | 2013-10-09 | 宁波激智科技股份有限公司 | Diffusion film applicable to sidelight type backlight module |
| CN203336480U (en) * | 2013-05-20 | 2013-12-11 | 北京京东方光电科技有限公司 | Optical membrane, backlight module and display device |
| CN203395811U (en) * | 2013-08-02 | 2014-01-15 | 昆山康佳电子有限公司 | Light-emitting diode (LED) lens and backlight module for direct type LED television (TV) |
| CN203907479U (en) * | 2014-07-04 | 2014-10-29 | 佛山市中山大学研究院 | LED lens with straight-down type backlight module |
| CN104456301A (en) * | 2014-11-15 | 2015-03-25 | 青岛歌尔声学科技有限公司 | LED light source modules, LED lamp bar and direct type backlight module |
| CN104566041A (en) * | 2015-01-20 | 2015-04-29 | 深圳市德仓科技有限公司 | Backlight module, liquid crystal module and terminal |
| CN104570481A (en) * | 2014-12-26 | 2015-04-29 | 上海天马微电子有限公司 | LED (Light Emitting Diode) light source, backlight module and liquid crystal display device |
| CN204513254U (en) * | 2015-02-10 | 2015-07-29 | 深圳市德仓科技有限公司 | A kind of lower bright enhancement film, backlight module, liquid crystal indicator and electronic equipment |
| CN105700063A (en) * | 2016-04-12 | 2016-06-22 | 东莞轩朗实业有限公司 | Glass light guide plate |
| CN109143429A (en) * | 2018-09-26 | 2019-01-04 | 江苏毅昌科技有限公司 | A kind of diffuser plate and preparation method thereof, backlight module |
| CN208705619U (en) * | 2018-08-15 | 2019-04-05 | 广州视源电子科技股份有限公司 | Down straight aphototropism mode set structure and display equipment |
-
2019
- 2019-07-17 CN CN201910645970.XA patent/CN112242092A/en active Pending
Patent Citations (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TW200540462A (en) * | 2004-06-11 | 2005-12-16 | Hannstar Display Corp | Flat display panel |
| CN101625477A (en) * | 2008-07-07 | 2010-01-13 | 东丽世韩有限公司 | Optical sheet for tft-lcd back light unit and liquid crystal display having the optical sheet |
| CN101639181A (en) * | 2009-08-07 | 2010-02-03 | 广东昭信光电科技有限公司 | Direct type backlighting system |
| CN101696777A (en) * | 2009-10-22 | 2010-04-21 | 华东师范大学 | High-reliability white light LED plane light source module |
| CN202886632U (en) * | 2012-09-24 | 2013-04-17 | 惠州市粤泰翔科技有限公司 | Light diffuser plate for backlight display device |
| CN203336480U (en) * | 2013-05-20 | 2013-12-11 | 北京京东方光电科技有限公司 | Optical membrane, backlight module and display device |
| CN103345011A (en) * | 2013-06-28 | 2013-10-09 | 宁波激智科技股份有限公司 | Diffusion film applicable to sidelight type backlight module |
| CN203395811U (en) * | 2013-08-02 | 2014-01-15 | 昆山康佳电子有限公司 | Light-emitting diode (LED) lens and backlight module for direct type LED television (TV) |
| CN203907479U (en) * | 2014-07-04 | 2014-10-29 | 佛山市中山大学研究院 | LED lens with straight-down type backlight module |
| CN104456301A (en) * | 2014-11-15 | 2015-03-25 | 青岛歌尔声学科技有限公司 | LED light source modules, LED lamp bar and direct type backlight module |
| CN104570481A (en) * | 2014-12-26 | 2015-04-29 | 上海天马微电子有限公司 | LED (Light Emitting Diode) light source, backlight module and liquid crystal display device |
| CN104566041A (en) * | 2015-01-20 | 2015-04-29 | 深圳市德仓科技有限公司 | Backlight module, liquid crystal module and terminal |
| CN204513254U (en) * | 2015-02-10 | 2015-07-29 | 深圳市德仓科技有限公司 | A kind of lower bright enhancement film, backlight module, liquid crystal indicator and electronic equipment |
| CN105700063A (en) * | 2016-04-12 | 2016-06-22 | 东莞轩朗实业有限公司 | Glass light guide plate |
| CN208705619U (en) * | 2018-08-15 | 2019-04-05 | 广州视源电子科技股份有限公司 | Down straight aphototropism mode set structure and display equipment |
| CN109143429A (en) * | 2018-09-26 | 2019-01-04 | 江苏毅昌科技有限公司 | A kind of diffuser plate and preparation method thereof, backlight module |
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