CN115327817A - Backlight module and display module - Google Patents
Backlight module and display module Download PDFInfo
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- CN115327817A CN115327817A CN202211056323.3A CN202211056323A CN115327817A CN 115327817 A CN115327817 A CN 115327817A CN 202211056323 A CN202211056323 A CN 202211056323A CN 115327817 A CN115327817 A CN 115327817A
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- groove
- structures
- layer
- bottom wall
- back plate
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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
- G02F1/133608—Direct backlight including particular frames or supporting means
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
- G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
- G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
- G02B6/0081—Mechanical or electrical aspects of the light guide and light source in the lighting device peculiar to the adaptation to planar light guides, e.g. concerning packaging
- G02B6/0086—Positioning aspects
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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
- G02F1/133603—Direct backlight with LEDs
Abstract
The invention discloses a backlight module and a display module, wherein the backlight module comprises: a back plate; the light guide plate is arranged on one side of the back plate, a groove is formed in one side, close to the back plate, of the light guide plate, and protruding structures used for reflecting and/or refracting light rays are distributed on the bottom wall of the groove; at least one of the protruding structure, the part of the bottom wall of the groove, where the protruding structure is distributed, and the part of the back plate, which corresponds to the protruding structure, is an elastic structure. At least one of the protruding structure, the part of the bottom wall of the groove, on which the protruding structure is distributed, and the part of the back plate, corresponding to the protruding structure, is set to be an elastic structure, and due to the buffering effect of the elastic structure, under the condition of external pressure, rigid contact can be avoided through the elastic structure, so that white spots caused by the elastic structure and peripheral damage can be avoided, and the display effect is ensured.
Description
Technical Field
The invention belongs to the technical field of display, and particularly relates to a backlight module and a display module.
Background
With the rapid development of notebooks, tablets, mobile phones, etc., the updating speed is very fast, and in order to pursue ultra-thin and ultra-light design and also consider the design cost, light and thin materials are often adopted. In the mechanism type test, white spots are easy to be caused by dynamic pressure, static pressure, bending, vibration and the like. Along with the ultra-thin ultralight of terminal and extremely narrow frame design, the casing worsens to the protection and the supporting role of inside Module, in the pressure test process, because the casing warp great, can lead to LCD display Module (LCD Module, LCM) body to receive great pressure. In the product verification test process, because pressure is transmitted to the inside of the LCM, rigid mesh points of the backlight light guide plate are pressed, so that white spots are caused by mesh points and peripheral damage, and the display effect of the display module is influenced.
Disclosure of Invention
The embodiment of the invention aims to provide a backlight module and a display module, which are used for solving the problem that white spots are easy to appear in an LCM.
In a first aspect, an embodiment of the present invention provides a backlight module, including:
a back plate;
the light guide plate is arranged on one side of the back plate, a groove is formed in one side, close to the back plate, of the light guide plate, and protruding structures used for reflecting and/or refracting light rays are distributed on the bottom wall of the groove;
at least one of the raised structure, the part of the bottom wall of the groove, where the raised structure is distributed, and the part of the back plate, which corresponds to the raised structure, is an elastic structure.
Wherein, the protruding structure and the back plate are arranged at intervals.
And a reflecting layer is arranged between the protruding structure and the back plate.
Wherein the reflective layer comprises a light transmissive layer and reflective particles dispersed in the light transmissive layer; and/or
The reflecting layer is an elastic layer; and/or
The reflecting layer is arranged in the groove; and/or
The reflecting layer and the protruding structure are arranged at intervals.
The bottom wall of the groove is provided with a connecting layer, and the protruding structures are distributed on one side, away from the bottom wall of the groove, of the connecting layer.
The bottom wall of the groove is provided with a plurality of micro-groove structures distributed at intervals, and the convex structures are arranged in the areas, corresponding to the micro-groove structures, on the connecting layer; and/or
The connecting layer is an elastic layer.
Wherein the height of the protruding structure is smaller than the depth of the groove.
The convex structures comprise convex structures with a first height and convex structures with a second height, the first height is different from the second height, and the convex structures with the first height and the convex structures with the second height are alternately distributed; and/or
The bottom wall of the groove is provided with a central area and an edge area, the edge area is arranged around the central area, and the distribution density of the raised structures on the central area is greater than that of the raised structures on the edge area; and/or
And the part of the back plate corresponding to the protruding structure is provided with an avoiding groove.
And a scattering particle layer is arranged on one side of the light guide plate, which is far away from the back plate.
Wherein, backlight unit still includes:
the optical sheet is arranged on one side, far away from the back plate, of the light guide plate.
In a second aspect, an embodiment of the present invention provides a display module, including:
the backlight module described in the above embodiments;
and the liquid crystal layer is packaged between the two substrates and is arranged on one side of the light guide plate, which is far away from the back plate.
In a third aspect, an embodiment of the present invention provides a method for manufacturing a light guide plate, including:
forming a groove on one side of the light guide plate body;
and forming a convex structure on the bottom wall of the groove, wherein the convex structure is an elastic structure and is used for reflecting and/or refracting light.
Wherein the step of forming a raised structure on the bottom wall of the recess comprises:
forming a plurality of raised structures distributed at intervals on the bottom wall of the groove by printing or coating; or
Forming a plurality of convex structures distributed at intervals on one side of the connecting layer;
connecting the other side of the connecting layer to the bottom wall of the groove; or
Forming a plurality of micro-groove structures distributed at intervals on the bottom wall of the groove;
forming a plurality of convex structures distributed at intervals on one side of the connecting layer;
and connecting the other side of the connecting layer to the bottom wall of the groove, wherein the protruding structure is arranged in an area corresponding to the micro-groove structure on the connecting layer. In the backlight module of the embodiment of the invention, the light guide plate is arranged on one side of the back plate, a groove is arranged on one side of the light guide plate close to the back plate, raised structures for reflecting and/or refracting light are distributed on the bottom wall of the groove, and at least one of the raised structures, the part of the bottom wall of the groove where the raised structures are distributed and the part of the back plate corresponding to the raised structures is an elastic structure. At least one of the part of the protruding structure distributed on the bottom wall of the groove and the part of the back plate corresponding to the protruding structure is set to be an elastic structure, and due to the buffering effect of the elastic structure, under the condition of external pressure, rigid contact can be avoided through the elastic structure, so that white spots caused by the elastic structure and peripheral damage can be avoided, and the display effect is ensured.
Drawings
FIG. 1 is a schematic structural diagram of a display module according to an embodiment of the invention;
FIG. 2 is a schematic structural diagram of a backlight module according to an embodiment of the invention;
FIG. 3 is a schematic view of an arrangement of a bump structure according to an embodiment of the present invention;
FIG. 4 is a schematic view of an arrangement of a projection structure according to another embodiment of the present invention;
FIG. 5 is a schematic view of an arrangement of a projection structure according to another embodiment of the present invention;
FIG. 6 is a schematic view of a light guide plate;
FIG. 7 is a schematic view of an arrangement of micro-groove structures;
FIG. 8 is a schematic view of a structure of a reflective layer;
FIG. 9 is a schematic view of a deformation process of the bump structure;
FIG. 10 is a schematic diagram of the light path of light in the light guide plate.
Reference numerals
A back plate 10; a groove 11; a micro-groove structure 12;
a light guide plate 20; the projection structures 21; a light source 22;
a reflective layer 30; a light-transmitting layer 31; reflective particles 32;
a connecting layer 40;
a scattering particle layer 50;
an optical sheet 60; a diffusion sheet 61; a prism sheet 62;
a substrate 70; a liquid crystal layer 71; a polarizer 72; a support structure 73.
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 any creative effort, shall fall within the protection scope of the present invention.
The terms first, second and the like in the description and in the claims of the present invention are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that embodiments of the invention may be practiced otherwise than as specifically illustrated and described herein. In addition, "and/or" in the specification and claims means at least one of connected objects, a character "/" generally means that a preceding and succeeding related objects are in an "or" relationship.
As shown in fig. 1 to 10, the backlight module according to the embodiment of the invention includes: the backlight module comprises a back plate 10 and a light guide plate 20, wherein the light guide plate 20 is arranged on one side of the back plate 10, the light guide plate 20 can be made of polymethyl methacrylate (PMMA) or Polycarbonate (PC), a groove 11 is formed in one side, close to the back plate 10, of the light guide plate 20, protruding structures 21 used for reflecting and/or refracting light rays are distributed on the bottom wall of the groove 11, and the protruding structures 21 can be printed on the bottom wall of the groove 11. The projection structure 21 may be spherical, columnar, polygonal, etc. The protruding structures 21 may be distributed in an array, and the protruding structures 21 may be uniformly distributed. The distribution density of the raised structures 21 in different regions can be the same or different, and the size and density of the raised structures 21 can be determined according to the optical requirements and can be selected according to the actual situation.
As shown in fig. 10, the light source 22 may be an LED light source, the light source 22 may be disposed at a side of the light guide plate 20, and light emitted from the light source 22 may enter the light guide plate 20 from the side of the light guide plate 20. Can reflect and/or refract light through protruding structure 21, light is penetrated into light guide plate 20 through light source 22, reflects inside light guide plate 20, because of the existence of protruding structure 21, has destroyed the total reflection for light can be followed the front and emitted, and partial light that passes through protruding structure 21 can be followed the surface refraction, can convert the line light source into the area source.
At least one of the raised structure 21, the portion of the bottom wall of the groove 11 where the raised structure 21 is distributed, and the portion of the back plate 10 corresponding to the raised structure 21 is an elastic structure. For example, the protrusion structure 21 may be an elastic structure, the whole protrusion structure 21 may be an elastic structure, or an outer layer of the protrusion structure 21 may have an elastic layer for covering, the protrusion structure 21 may be an elastic sphere or a hemisphere, and the protrusion structure 21 may reflect and/or refract light, may deform when being subjected to pressure, and reduces rigid contact collision. As shown in fig. 9, the protrusion structure 21 may be an elastic ball shape, and may be deformed when receiving a pressure, and the deformation returns to the original shape after the pressure disappears, so as to reduce rigid contact collision. The part of the bottom wall of the recess 11 where the protruding structures 21 are distributed is an elastic structure, which may be an elastic layer, and the elastic layer has a buffering effect when being pressed. The part of the back plate 10 corresponding to the protruding structure 21 can be an elastic structure, the elastic structure can be an elastic layer, the protruding structure 21 can contact and extrude the elastic layer when the back plate is under pressure, the elastic layer deforms, rigid contact collision is reduced, and the white spot problem is avoided, so that the capability of the whole module for resisting mechanical testing white spots and interfering the white spots is effectively improved, the generation of the white spots is fundamentally reduced, and various tests are effectively dealt with.
In the backlight module of the embodiment of the invention, at least one of the part of the bottom wall of the convex structure 21 and the groove 11, which is distributed with the convex structure 21, and the part of the back plate 10, which corresponds to the convex structure 21, is set to be an elastic structure, and due to the buffering effect of the elastic structure, under the condition of external pressure, rigid contact can be avoided through the elastic structure, so that white spots caused by the elastic structure and peripheral damage can be avoided, and the display effect is ensured.
The height of the protruding structures 21 and the depth of the grooves 11 can be selected according to practical requirements, and when the height of the protruding structures 21 is greater than the depth of the grooves 11, parts of the protruding structures 21 can extend out of the grooves 11; when the height of the protruding structure 21 is equal to the depth of the groove 11, the opening of the protruding structure 21 and the opening of the groove 11 may be in the same plane; when the height of the protruding structure 21 is smaller than the depth of the groove 11, the protruding structure 21 is completely located in the groove 11, the protruding structure 21 does not extend out of the groove 11, and when the height of the protruding structure 21 is smaller than or equal to the depth of the groove 11, the occupied space of the protruding structure 21 can be reduced, and the occupied space of the protruding structure 21 extending out of the groove 11 is avoided.
In some embodiments, the protruding structure 21 is spaced from the back plate 10, a certain gap is formed between the protruding structure 21 and the back plate 10, the protruding structure 21 moves towards the back plate 10 when being pressed, a certain buffer space is formed, the contact collision between the protruding structure 21 and the back plate 10 is reduced, and the white spot problem is further reduced.
Optionally, as shown in fig. 1 to 5, a reflective layer 30 is disposed between the protruding structure 21 and the back plate 10. The reflective layer 30 may have foamed particles therein, and the reflective layer 30 may reflect light to improve light reflection and utilization efficiency.
As shown in fig. 8, the reflective layer 30 includes a light transmissive layer 31 and reflective particles 32, the light transmissive layer 31 may be an optical glue layer, the light transmissive layer 31 may be a polyurethane layer or a polyimide layer, the reflective particles 32 are dispersed in the light transmissive layer 31, the reflective particles 32 are uniformly dispersed in the light transmissive layer 31, the reflective particles 32 may include at least one of polycarbonate particles, polymethyl methacrylate particles, and silica particles, and the reflective particles 32 may reflect light and improve light reflection and utilization efficiency.
Optionally, the reflective layer 30 may be an elastic layer, and the reflective layer 30 has a buffering function, so that the protruding structures 21 move towards the reflective layer 30 when receiving pressure, and has a certain buffering function, thereby avoiding rigid collision between the protruding structures 21 and the back plate 10, and reducing the occurrence of white spots.
Optionally, as shown in fig. 1 to 7, a groove 11 is disposed on one side of the light guide plate 20 close to the back plate 10, the protruding structures 21 are distributed on a bottom wall of the groove 11, the reflective layer 30 is disposed in the groove 11, and the protruding structures 21 may be elastic structures, which can protect the reflective layer 30 from being pressed. The edge of the reflective layer 30 may be connected to the inner sidewall of the groove 11, for example, the reflective layer 30 may be an adhesive layer, and the edge of the reflective layer 30 may be adhesively connected to the inner sidewall of the groove 11. The protrusion structures 21 and the reflective layer 30 are disposed in the groove 11, so that the space occupation of the protrusion structures 21 and the reflective layer 30 can be reduced, and the groove 11 can also protect the protrusion structures 21 and the reflective layer 30. The reflective layer 30 and the light guide plate 20 can be integrated, and the reflective layer 30 can replace the function of a reflective sheet, so that the traditional reflective sheet is not needed, the cost of the film is reduced, and the overall thickness can be reduced. As shown in fig. 10, light enters the light guide plate 20 through the light source 22, and is reflected inside the light guide plate 20, and due to the existence of the protrusion structures 21, total reflection is broken, so that light can be emitted from the front, part of the light passing through the protrusion structures 21 can be refracted from the surface, and the light below the groove 11 is reflected back to the light guide plate 20 through the reflective layer 30 below, so that the utilization of light efficiency is realized.
Optionally, the reflective layer 30 and the protruding structures 21 may be disposed at an interval, a certain gap is provided between the reflective layer 30 and the protruding structures 21, and when the light guide plate 20 is pressed and the protruding structures 21 move close to the reflective layer 30, a certain moving space may be provided through the gap, so that the protruding structures 21 may contact the reflective layer 30 only when moving close to the reflective layer 30 by a certain distance, thereby reducing contact collision between the protruding structures 21 and the reflective layer 30 and reducing the occurrence of white spots.
In some embodiments, as shown in fig. 1, fig. 2, fig. 4, and fig. 5, a connection layer 40 is disposed on the bottom wall of the groove 11, and a side of the connection layer 40 away from the bottom wall of the groove 11 is distributed with the protruding structures 21. The connecting layer 40 may be an adhesive layer, one side of the connecting layer 40 may be adhered to the bottom wall of the groove 11, the protruding structures 21 may be distributed on the other side of the connecting layer 40, and the protruding structures 21 may be printed on the other side of the connecting layer 40, for example, the protruding structures 21 may be printed on the other side of the connecting layer 40 by laser printing. The tie layer 40 may be formed of one or more layers of glue, the tie layer 40 may be polyethylene terephthalate (PET), and the tie layer 40 may have particles therein, by which the strength of the tie layer 40 may be enhanced.
In the embodiment of the present invention, as shown in fig. 5 and 7, the bottom wall of the groove 11 has a plurality of micro-groove structures 12 distributed at intervals, the micro-groove structures 12 can be formed by punching through laser printing, the protrusion structures 21 are disposed on the connecting layer 40 in the areas corresponding to the micro-groove structures 12, and the connecting strength between the connecting layer 40 and the light guide plate 20 can be enhanced by the micro-groove structures 12. During the application process, a carbon dioxide laser pulse or a laser may be used to form a certain micro-groove structure 12 on the bottom wall of the groove 11 of the light guide plate 20.
The connection layer 40 may be an elastic layer, the connection layer 40 may be recessed into the micro-groove structure 12, the protrusion structures 21 on the connection layer 40 may be located in the corresponding micro-groove structures 12, and the protrusion structures 21 may partially protrude out of the micro-groove structures 12 so as to have a buffering effect when being subjected to pressure.
In some embodiments, the light guide plate 20 is provided with a groove 11 on a side thereof close to the back plate 10, the protrusion structures 21 are distributed on the bottom wall of the groove 11, and the protrusion structures 21 may be directly coated on the bottom wall of the groove 11, so as to reduce the space occupation.
Optionally, the height of the protruding structure 21 is smaller than the depth of the groove 11, the protruding structures 21 are all located in the groove 11, and the protruding structure 21 does not extend out of the groove 11, so that the space occupied by the protruding structure 21 can be reduced, and the space occupied by the protruding structure 21 extending out of the groove 11 is avoided. The height of the protruding structures 21 may be 50-600um, for example, the height of the protruding structures 21 may be 100um, and the specific height of the protruding structures 21 may be selected according to practical requirements.
Alternatively, the bump structures include the bump structures 21 having a first height and the bump structures 21 having a second height, the first height is different from the second height, the bump structures having the first height and the bump structures having the second height are alternately distributed, and two-stage buffering can be realized by the bump structures 21 having different heights.
The raised structures may include raised structures 21 having a first height and raised structures 21 having a second height, the first height being different from the second height. The protruding structures 21 with the first height may be distributed in an array, the protruding structures 21 with the second height may be distributed in an array, and the protruding structures 21 with the first height and the protruding structures 21 with the second height may be alternately distributed. The protruding structures 21 have elasticity, and the first height can be greater than the second height, and when the light guide plate 20 is pressed to move close to the back plate 10, the protruding structures 21 with the first height can contact the back plate 10 first to realize a buffering effect, and along with the light guide plate 20 continuing to move close to the back plate 10, the protruding structures 21 with the second height can contact the back plate 10 to further realize the buffering effect, and two-stage buffering is realized through the protruding structures 21 with different heights.
Optionally, the bottom wall of the recess 11 has a central region and an edge region, the edge region is disposed around the central region, and the distribution density of the raised structures 21 on the central region is greater than that of the raised structures 21 on the edge region, so that the raised structures 21 in the central region have a better cushioning effect.
The bottom wall of the groove 11 may have a middle area and an edge area, the edge area may be disposed around the central area, the edge area may be annular, the distribution density of the protrusion structures 21 in the central area may be greater than the distribution density of the protrusion structures 21 in the edge area, so that the protrusion structures 21 in the central area are more than the edge area, and have a stronger buffering effect, when the light guide plate 20 is pressed to move close to the back plate 10, the central area is more likely to deform, the central area is more likely to contact the back plate 10 first, the pressure applied to the central area is relatively greater, the distribution density of the protrusion structures 21 in the central area is greater, and a relatively better buffering effect may be achieved. The protruding structures 21 with the first height may be disposed in the middle region, the protruding structures 21 with the second height may be disposed in the edge region, the protruding structures 21 have elasticity, the first height may be greater than the second height, and the central region is easier to contact the back plate 10 first, so that the protruding structures 21 in the central region have a better buffering effect.
Optionally, the portion of the back plate 10 corresponding to the protruding structure 21 is provided with an avoiding groove. The portion that corresponds with protruding structure 21 on backplate 10 can be equipped with and dodge the groove for certain clearance has between backplate 10 and the protruding structure 21, receives pressure protruding structure 21 and is close to backplate 10 when removing at light guide plate 20, can have certain removal space through dodging the groove, just can contact backplate 10 when making protruding structure 21 move certain distance near backplate 10, reduces the contact collision between protruding structure 21 and the backplate 10, reduces the problem that the white spot appears.
Optionally, as shown in fig. 2, a side of the light guide plate 20 away from the back plate 10 is provided with a scattering particle layer 50. The light guide plate 20 can be coated with the scattering particle layer 50 on the side away from the back plate 10 by a coating method, and the scattering particle layer 50 can be a coating layer dispersed with scattering particles to increase the diffusion effect and enhance the undesirable shielding effect, thereby integrating the functions of the diffusion sheet. The scattering particles may include metal oxide particles or organic particles, among others. The metal oxide may include titanium oxide (TiO) 2 ) Zirconium oxide (ZrO) 2 ) Aluminum oxide (Al) 2 O 3 ) Indium oxide (In) 2 O 3 ) Zinc oxide (ZnO) and tin oxide (SnO) 2 ) At least one of (1). The material of the organic particles may include at least one of acrylic resin and urethane resin, and the scattering particles may scatter light in random directions.
Optionally, as shown in fig. 1 and fig. 2, the backlight module further includes: the optical sheet 60 is disposed on a side of the light guide plate 20 away from the back plate 10. The optical sheet 60 may include at least one of a prism sheet 62 and a diffusion sheet 61, and the optical sheet 60 may include a diffusion sheet 61, a prism sheet 62, and a diffusion sheet 61, which are stacked, by which light can be made softer, and by which light can be made to increase light intensity and brightness at an angle. Optical cement can be arranged between the diffusion sheet 61 and the prism sheet 62, and between the prism sheet 62 and the prism sheet 62, the connection can be realized through the optical cement, and the optical cement can fill the gap to prevent bubbles.
The back plate 10 may have a receiving cavity, the whole back plate 10 may be U-shaped, the light guide plate 20 may be disposed in the receiving cavity, and the protrusion structure 21 may be disposed on one side of the light guide plate 20 close to the bottom wall of the receiving cavity. The optical sheet 60 may be disposed in the accommodating cavity, a supporting structure 73 may be disposed between a sidewall of the accommodating cavity and the backlight module, the supporting structure 73 may be disposed around a periphery of the backlight module, the supporting structure 73 may be made of a gel material, and the backlight module may be protected by the supporting structure 73.
An embodiment of the present invention provides a display module, as shown in fig. 1, the display module includes: the backlight module described in the above embodiments and the liquid crystal layer 71 encapsulated between the two substrates 70, the liquid crystal layer 71 is disposed on one side of the light guide plate 20 away from the back plate 10. The substrate 70 may be a glass plate, and a polarizer 72 may be disposed on a side of the substrate 70 away from the liquid crystal layer 71 to achieve a polarizing effect. The substrate 70 and the polarizer 72 may be disposed outside the receiving cavity, and the polarizer 72 on one side may be disposed on the supporting structure 73, and the substrate 70 may be supported by the supporting structure 73.
The preparation method of the light guide plate comprises the following steps:
a groove 11 is formed on one side of the light guide plate body;
a convex structure 21 is formed on the bottom wall of the groove 11, the convex structure 21 is an elastic structure, and the convex structure 21 is used for reflecting and/or refracting light.
The light guide plate 20 prepared by the method can be applied to a backlight module, the light guide plate 20 can be arranged on one side of the back plate 10, the light guide plate 20 can be made of polymethyl methacrylate (PMMA) or Polycarbonate (PC) materials, a groove 11 is arranged on one side of the light guide plate 20 close to the back plate 10, and protruding structures 21 for reflecting and/or refracting light rays are distributed on the bottom wall of the groove 11. The projection structure 21 may be spherical, columnar, polygonal, etc. The protruding structures 21 may be distributed in an array, and the protruding structures 21 may be uniformly distributed. The distribution density of the raised structures 21 in different regions can be the same or different, and the size and density of the raised structures 21 can be determined according to the optical requirements and can be selected according to the actual situation.
In some embodiments, the step of forming the raised structures 21 on the bottom wall of the recess 11 comprises:
a plurality of raised structures 21 are formed on the bottom wall of the recess 11 by printing or coating.
The raised structures 21 can be directly coated on the bottom wall of the groove 11, and a plurality of raised structures 21 distributed at intervals can be formed on the bottom wall of the groove 11 by printing, so that the method is simple.
Alternatively, the step of forming the projection structure 21 on the bottom wall of the groove 11 includes:
forming a plurality of convex structures 21 distributed at intervals on one side of the connecting layer 40;
the other side of the connecting layer 40 is connected to the bottom wall of the recess 11.
The protruding structures 21 may be printed or coated on one side of the connection layer 40, for example, the protruding structures 21 may be printed on one side of the connection layer 40 by laser printing, and then the other side of the connection layer 40 is connected to the bottom wall of the recess 11, so that the protruding structures 21 are disposed on the bottom wall of the recess 11 through the connection layer 40.
Alternatively, the step of forming the convex structure 21 on the bottom wall of the groove 11 includes:
a plurality of micro-groove structures 12 distributed at intervals are formed on the bottom wall of the groove 11;
forming a plurality of convex structures 21 distributed at intervals on one side of the connecting layer 40;
the other side of the connection layer 40 is connected to the bottom wall of the groove 11, and the convex structure 21 is arranged on the connection layer 40 in the region corresponding to the micro-groove structure 12.
The micro-groove structure 12 can be punched on the bottom wall of the groove 11 by laser printing, and a certain micro-groove structure 12 can be formed on the bottom wall of the groove 11 by adopting a carbon dioxide laser pulse or laser mode. The protruding structures 21 may be printed or coated on one side of the connection layer 40, for example, the protruding structures 21 may be printed on one side of the connection layer 40 by laser printing, and then the other side of the connection layer 40 is connected to the bottom wall of the groove 11, so that the protruding structures 21 are disposed on the bottom wall of the groove 11 through the connection layer 40, the protruding structures 21 are disposed on the connection layer 40 in an area corresponding to the micro-groove structures 12, and the connection strength between the connection layer 40 and the light guide plate 20 can be enhanced through the micro-groove structures 12.
While the present invention has been described with reference to the particular illustrative embodiments, it is to be understood that the invention is not limited to the disclosed embodiments, but is intended to cover various modifications, equivalent arrangements, and equivalents thereof, which may be made by those skilled in the art without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (13)
1. A backlight module, comprising:
a back plate;
the light guide plate is arranged on one side of the back plate, a groove is formed in one side, close to the back plate, of the light guide plate, and protruding structures used for reflecting and/or refracting light rays are distributed on the bottom wall of the groove;
at least one of the protruding structure, the part of the bottom wall of the groove, where the protruding structure is distributed, and the part of the back plate, which corresponds to the protruding structure, is an elastic structure.
2. A backlight module according to claim 1, wherein the protrusion structures are spaced apart from the back plate.
3. The backlight module according to claim 1, wherein a reflective layer is disposed between the protrusion structure and the back plate.
4. The backlight module according to claim 3, wherein the reflective layer comprises a light transmissive layer and reflective particles dispersed in the light transmissive layer; and/or
The reflecting layer is an elastic layer; and/or
The reflecting layer is arranged in the groove; and/or
The reflecting layer and the protruding structures are arranged at intervals.
5. The backlight module according to claim 1, wherein a connecting layer is disposed on the bottom wall of the groove, and the protruding structures are distributed on a side of the connecting layer away from the bottom wall of the groove.
6. The backlight module according to claim 5, wherein the bottom wall of the recess has a plurality of micro-groove structures distributed at intervals, and the protrusion structures are disposed on the connection layer in regions corresponding to the micro-groove structures; and/or
The connecting layer is an elastic layer.
7. A backlight module according to claim 1, wherein the height of the protruding structures is less than the depth of the grooves.
8. The backlight module as claimed in claim 1, wherein the raised structures comprise raised structures with a first height and raised structures with a second height, the first height is different from the second height, and the raised structures with the first height alternate with the raised structures with the second height; and/or
The bottom wall of the groove is provided with a central area and an edge area, the edge area is arranged around the central area, and the distribution density of the raised structures on the central area is greater than that of the raised structures on the edge area; and/or
And the part of the back plate corresponding to the protruding structure is provided with an avoiding groove.
9. The backlight module according to claim 1, wherein a scattering particle layer is disposed on a side of the light guide plate away from the back plate.
10. The backlight module of claim 1, further comprising:
the optical sheet is arranged on one side, far away from the back plate, of the light guide plate.
11. A display module, comprising:
a backlight module according to any one of claims 1 to 10;
and the liquid crystal layer is packaged between the two substrates and is arranged on one side of the light guide plate, which is far away from the back plate.
12. A method for manufacturing a light guide plate, comprising:
forming a groove on one side of the light guide plate body;
and forming a convex structure on the bottom wall of the groove, wherein the convex structure is an elastic structure and is used for reflecting and/or refracting light.
13. The method of claim 12, wherein the step of forming the raised structure on the bottom wall of the recess comprises:
forming a plurality of raised structures distributed at intervals on the bottom wall of the groove by printing or coating; or
Forming a plurality of convex structures distributed at intervals on one side of the connecting layer;
connecting the other side of the connecting layer to the bottom wall of the groove; or
Forming a plurality of micro-groove structures distributed at intervals on the bottom wall of the groove;
forming a plurality of convex structures distributed at intervals on one side of the connecting layer;
and connecting the other side of the connecting layer to the bottom wall of the groove, wherein the protruding structure is arranged in an area corresponding to the micro-groove structure on the connecting layer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211056323.3A CN115327817A (en) | 2022-08-31 | 2022-08-31 | Backlight module and display module |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211056323.3A CN115327817A (en) | 2022-08-31 | 2022-08-31 | Backlight module and display module |
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| CN115327817A true CN115327817A (en) | 2022-11-11 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211056323.3A Pending CN115327817A (en) | 2022-08-31 | 2022-08-31 | Backlight module and display module |
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| CN (1) | CN115327817A (en) |
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