CN114217479A - Optical assembly, backlight module and display device - Google Patents
Optical assembly, backlight module and display device Download PDFInfo
- Publication number
- CN114217479A CN114217479A CN202210122990.0A CN202210122990A CN114217479A CN 114217479 A CN114217479 A CN 114217479A CN 202210122990 A CN202210122990 A CN 202210122990A CN 114217479 A CN114217479 A CN 114217479A
- Authority
- CN
- China
- Prior art keywords
- light
- guide plate
- light source
- optical assembly
- light guide
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 230000003287 optical effect Effects 0.000 title claims abstract description 91
- 230000000149 penetrating effect Effects 0.000 claims abstract description 5
- 238000009792 diffusion process Methods 0.000 claims description 17
- 238000009434 installation Methods 0.000 claims description 2
- 239000000243 solution Substances 0.000 description 8
- 230000000694 effects Effects 0.000 description 5
- 238000000034 method Methods 0.000 description 5
- 239000012788 optical film Substances 0.000 description 5
- 230000015572 biosynthetic process Effects 0.000 description 3
- 210000005056 cell body Anatomy 0.000 description 3
- 239000004973 liquid crystal related substance Substances 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 210000002421 cell wall Anatomy 0.000 description 2
- NIXOWILDQLNWCW-UHFFFAOYSA-N acrylic acid group Chemical group C(C=C)(=O)O NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 230000008094 contradictory effect Effects 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- 238000001746 injection moulding Methods 0.000 description 1
- 238000010147 laser engraving Methods 0.000 description 1
- 230000031700 light absorption Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 235000009537 plain noodles Nutrition 0.000 description 1
- 229920003229 poly(methyl methacrylate) Polymers 0.000 description 1
- 239000004417 polycarbonate Substances 0.000 description 1
- 229920000515 polycarbonate Polymers 0.000 description 1
- -1 polyethylene terephthalate Polymers 0.000 description 1
- 229920000139 polyethylene terephthalate Polymers 0.000 description 1
- 239000005020 polyethylene terephthalate Substances 0.000 description 1
- 239000004926 polymethyl methacrylate Substances 0.000 description 1
- 238000007639 printing Methods 0.000 description 1
- 238000002310 reflectometry Methods 0.000 description 1
- 238000007650 screen-printing Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Images
Classifications
-
- 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
-
- 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
-
- 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
- G02F1/133611—Direct backlight including means for improving the brightness uniformity
Landscapes
- Physics & Mathematics (AREA)
- Nonlinear Science (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Mathematical Physics (AREA)
- Chemical & Material Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Planar Illumination Modules (AREA)
Abstract
The invention discloses an optical assembly, a backlight module and a display device. The optical assembly comprises a light guide plate, at least one first light source and at least one second light source; the bottom of the light guide plate is provided with at least one avoidance hole penetrating to the top; the first light sources are arranged at the bottom of the light guide plate, and each first light source is opposite to one avoidance hole; the second light source is arranged on the side edge of the light guide plate, and the light emitting surface of the second light source faces the side edge of the light guide plate. The technical scheme of the invention can solve the problems that the overall brightness of the lateral type display device is not high and the overall picture of the direct type display device is not uniform.
Description
Technical Field
The invention relates to the technical field of liquid crystal display, in particular to an optical assembly, a backlight module and a display device.
Background
Currently, liquid crystal display devices are mainly classified into a side-in type and a direct type according to the position of a light source. The light source of the side-in type display device is arranged at the side edge, and the light emitted by the light source is guided into the optical film by using the light guide plate, so that the whole picture of the display device is uniform, but the whole brightness of the side-in type display device is difficult to improve due to the limitation of the number of the light sources and the heat dissipation of a system; the light source array of the direct type display device is arranged at the bottom of the liquid crystal glass, so that the overall brightness of the direct type display device can be improved, but the brightness of the position corresponding to the light source is inconsistent with the brightness of the position corresponding to the non-light source, so that the overall picture of the direct type display device is not uniform.
Disclosure of Invention
The invention provides an optical assembly, which aims to solve the problems that the overall brightness of a lateral type display device is not high and the overall picture of a direct type display device is not uniform.
To achieve the above object, the present invention provides an optical assembly comprising:
the bottom of the light guide plate is provided with at least one avoidance hole penetrating to the top;
the first light source is arranged at the bottom of the light guide plate, and each first light source is opposite to one avoidance hole; and
the second light source is arranged on the side edge of the light guide plate, and a light emitting surface of the second light source faces the side edge of the light guide plate.
In an embodiment of the invention, a light distribution structure is formed in the light guide plate.
In an embodiment of the invention, a plurality of the light distribution structures are provided, and the plurality of the light distribution structures are arranged at intervals.
In an embodiment of the invention, a cross-sectional area of the avoiding hole is larger than a cross-sectional area of the first light source.
In an embodiment of the invention, the top of the light guide plate is provided with at least one light splitting structure, and each of the first light sources is disposed opposite to one of the light splitting structures.
In an embodiment of the invention, the bottom of the light splitting structure has grooves, each groove is opposite to one of the avoiding holes, and the cross-sectional area of the groove is smaller than that of the avoiding hole and larger than that of the first light source.
In an embodiment of the invention, the top of the light splitting structure has an arc area recessed toward the first light source for reflecting the light emitted by the first light source.
In an embodiment of the invention, the top of the light splitting structure has an arc-shaped region protruding in a direction away from the first light source, for refracting light emitted by the first light source.
The present invention further provides a backlight module, which includes:
a back plate;
the middle frame is arranged around the back plate and forms an installation groove with the back plate in an enclosing manner;
the optical assembly is arranged in the mounting groove, and the light emitting side of the optical assembly faces to the notch of the mounting groove; and
the diffusion plate is arranged in the mounting groove and is positioned on one side of the optical assembly, which is back to the bottom of the mounting groove;
wherein, the optical assembly includes:
the bottom of the light guide plate is provided with at least one avoidance hole penetrating to the top;
the first light source is arranged at the bottom of the light guide plate, and each first light source is opposite to one avoidance hole; and
the second light source is arranged on the side edge of the light guide plate, and a light emitting surface of the second light source faces the side edge of the light guide plate.
In an embodiment of the invention, the top of the light guide plate is provided with at least one light splitting structure, and each of the first light sources is disposed opposite to one of the light splitting structures; defining the distance between the light guide plate of the optical assembly and the diffusion plate to be L;
when L is less than or equal to 25mm, the top of the light splitting structure is provided with an arc-shaped area which is concavely arranged towards the direction of the first light source and is used for reflecting light rays emitted by the first light source;
when L is larger than 25mm, the top of the light splitting structure is provided with an arc-shaped area which is convexly arranged in the direction far away from the first light source and is used for refracting the light rays emitted by the first light source.
The invention further provides a display device, which comprises a display panel and the backlight module, wherein the display panel is arranged on one side of the diffusion plate, which faces away from the optical assembly.
The optical component of the invention is characterized in that at least one first light source and at least one second light source are respectively arranged at the bottom and the side edge of the light guide plate; the first light sources with corresponding quantity can be arranged at the bottom of the light guide plate without being limited by space, so that the overall brightness of the optical assembly is ensured, and the overall brightness of the display device is further ensured; meanwhile, light emitted by the second light source can enter the light guide plate through the side edge of the light guide plate, and the light is incident into the light guide plate and is diffused towards all angles, and then is emitted out from the top of the light guide plate, so that the light emitting uniformity of the optical assembly can be effectively ensured, and the uniformity of the whole picture of the display device can be effectively ensured. Therefore, the technical scheme of the invention solves the problems that the overall brightness of the side-in type display device is not high and the overall picture of the direct type display device is not uniform.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.
FIG. 1 is an exploded view of an embodiment of an optical assembly of the present invention;
FIG. 2 is an exploded view of an embodiment of an optical assembly of the present invention;
FIG. 3 is a partial exploded view of another embodiment of an optical assembly according to the present invention;
FIG. 4 is a schematic view of a light guide plate according to an embodiment of the present invention;
FIG. 5 is a schematic view of a light guide plate according to an embodiment of the present invention;
FIG. 6 is an exploded view of a backlight module according to an embodiment of the present invention;
FIG. 7 is a cross-sectional view of a backlight module according to an embodiment of the invention;
FIG. 8 is an exploded view of an embodiment of a display device according to the present invention.
The reference numbers illustrate:
the implementation, functional features and advantages of the objects of the present invention will be further explained with reference to the accompanying drawings.
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 only a part of the embodiments of the present invention, and not all of the embodiments. 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.
It should be noted that, if directional indication is involved in the embodiment of the present invention, the directional indication is only used for explaining the relative positional relationship, the motion situation, and the like between the components in a certain posture, and if the certain posture is changed, the directional indication is changed accordingly.
In addition, if there is a description of "first", "second", etc. in an embodiment of the present invention, the description of "first", "second", etc. is for descriptive purposes only and is not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In addition, technical solutions between various embodiments may be combined with each other, but must be realized by a person skilled in the art, and when the technical solutions are contradictory or cannot be realized, such a combination should not be considered to exist, and is not within the protection scope of the present invention.
The present invention provides an optical assembly 10, which aims to solve the problems of low overall brightness of a side-in type display device 1000 and non-uniform overall picture of a direct type display device 1000.
The following will describe a specific structure of the optical module 10 of the present invention:
referring to fig. 1 to fig. 3, in an embodiment of the optical device 10 of the present invention, the optical device 10 includes a light guide plate 11, at least one first light source 13, and at least one second light source 14; the bottom of the light guide plate 11 is provided with at least one avoidance hole 112 penetrating to the top; the first light sources 13 are disposed at the bottom of the light guide plate 11, and each first light source 13 is disposed opposite to one of the avoiding holes 112; the second light source 14 is disposed at a side edge of the light guide plate 11, and a light emitting surface of the second light source 14 is disposed toward the side edge of the light guide plate 11.
It is understood that the optical assembly 10 of the present invention is provided by providing at least one first light source 13 and at least one second light source 14 at the bottom and side edges of the light guide plate 11, respectively; a corresponding number of first light sources 13 may be disposed at the bottom of the light guide plate 11 without being limited by space, so as to ensure the overall brightness of the optical assembly 10, and thus the overall brightness of the display apparatus 1000; meanwhile, light emitted by the second light source 14 can enter the light guide plate 11 through the side edge of the light guide plate 11, and the light enters the light guide plate 11 and is diffused at various angles, and then is emitted from the top of the light guide plate 11, so that the light emitting uniformity of the optical assembly 10 can be effectively ensured, and the uniformity of the whole picture of the display device 1000 can be effectively ensured. Therefore, the technical scheme of the invention solves the problems that the overall brightness of the side-in type display device 1000 is not high and the overall picture of the direct type display device 1000 is not uniform.
In addition, the light emitting surface of each first light source 13 is disposed toward one avoiding hole 112, so as to ensure that most of the light rays emitted by each first light source 13 can pass through one avoiding hole 112 to be emitted, and other light rays enter the light guide plate 11 through the hole wall of the avoiding hole 112, so that the light energy of the first light source 13 can be fully utilized, and the light energy loss can be reduced.
It should be noted that, by providing at least one first light source 13 and at least one second light source 14 on the bottom and the side edge of the light guide plate 11, respectively, to form the optical assembly 10, the optical assembly 10 of the present invention is equivalent to combining the original side-in type optical structure with the original direct type optical structure, so as to overcome the problems of low overall brightness of the side-in type display apparatus 1000 and non-uniformity of the overall screen of the direct type display apparatus 1000.
Specifically, the light guide plate 11 is prepared by printing light guide dots on the bottom surface of an optical acrylic or polycarbonate plate by using laser engraving, V-shaped cross grid engraving, and UV screen printing techniques, and then using a high-tech material with a very high refractive index and no light absorption.
The optical assembly 10 further includes a first light source circuit board 15 and a second light source circuit board 16, wherein the first light source circuit board 15 is disposed at the bottom of the light guide plate 11 and electrically connected to the first light source 13, and the second light source circuit board 16 is disposed at a side of the second light source 14 opposite to the light guide plate 11 and electrically connected to the second light source 14.
The optical module 10 further includes a heat sink 17, the heat sink 17 is partially disposed on a side of the second light source circuit board 16 facing away from the second light source 14 to dissipate heat of the second light source 14 and the second light source circuit board 16, and the heat sink 17 is partially disposed on a side of the first light source circuit board 15 facing away from the light guide plate 11 to dissipate heat with the first light source 13 and the first light source circuit board 15.
Further, referring to fig. 2 and fig. 3 in combination, in an embodiment of the optical assembly 10 of the present invention, the cross-sectional area of the avoiding hole 112 is larger than the cross-sectional area of the first light source 13; with such an arrangement, it can be ensured that as much light as possible in the light emitted by each first light source 13 can directly pass through one avoidance hole 112 to be emitted, so as to fully utilize the light energy of the first light source 13, thereby reducing the light energy loss.
Further, referring to fig. 4, in an embodiment of the optical assembly 10 of the present invention, a light distribution structure 111 is formed in the light guide plate 11; so set up, in the light that gets into light guide plate 11, there is some light to avoid grading structure 111 and directly pass light guide plate 11, and some light can take place reflection or refraction on grading structure 111 and light guide plate 11's critical plane, and can take place after multiple reflection or refraction in light guide plate 11's inside, the top light-emitting of rethread light guide plate 11, in order to redistribute the light, thereby increase light guide plate 11's the angle of light-emitting, in order to further promote optical component 10's light-emitting homogeneity, alright further promote display device 1000's whole light-emitting homogeneity.
Specifically, the light guide plate 11 may be formed with bubbles by a physical or chemical method in an injection molding process, so as to form the light distribution structure 111 inside the light guide plate 11, for example, a biaxial stretching process may be used to form the light distribution structure 111 inside the light guide plate 11, in this case, the light distribution structure 111 may be a hollow structure; of course, in other embodiments, the light distribution structure 111 may be an ink black dot or the like.
Further, referring to fig. 4, in an embodiment of the optical assembly 10 of the present invention, a plurality of light distribution structures 111 are provided, and the plurality of light distribution structures 111 are disposed at intervals; with such an arrangement, after the light enters the light guide plate 11, more light can be reflected or refracted through the critical surface between the light distribution structure 111 and the light guide plate 11, and the reflection or refraction coefficient of the light in the light guide plate 11 can be improved, so that the reflectivity and the refractive index of the light are improved, and the light emitting angle of the light guide plate 11 is further increased.
Further, referring to fig. 4, in an embodiment of the optical assembly 10 of the present invention, a volume of the light distribution structure 111 occupies 8% to 10% of a volume of the light guide plate 11; when the volume of the light distribution structure 111 is too small, it cannot be guaranteed that most of light rays entering the light guide plate 11 can be subjected to secondary light splitting through a critical surface between the light distribution structure 111 and the light guide plate 11, so that the light emitting angle of the light guide plate 11 cannot be effectively increased; when the volume of the light distribution structure 111 occupies too large of the volume of the light guide plate 11, the self-supporting strength of the light guide plate 11 is insufficient, and the deformation is easy to occur to affect the use effect; therefore, by setting the volume of the light distribution structure 111 to be between 8% and 10% of the volume of the light guide plate 11, the above-described problem can be effectively avoided.
Further, referring to fig. 4 and fig. 5 in combination, in an embodiment of the optical assembly 10 of the present invention, a width of the light distribution structure 111 in the thickness direction of the light guide plate 11 is defined as M1Then the condition is satisfied: m is not more than 0.05mm1Less than or equal to 0.15 mm; when the width of the light distribution structure 111 in the thickness direction of the light guide plate 11 is too small, on one hand, the formation of the light distribution structure 111 is inconvenient, and on the other hand, it cannot be ensured that most of the light rays entering the light guide plate 11 can be subjected to secondary light splitting through a critical surface between the light distribution structure 111 and the light guide plate 11; when the width of the light distribution structure 111 in the thickness direction of the light guide plate 11 is too large, the light guide plate 11 is easily deformed or even broken during transportation or use, thereby affecting the use effect; therefore, the above-mentioned problem can be effectively avoided by setting the width of the light distribution structure 111 in the thickness direction of the light guide plate 11 to be between 0.05mm and 0.15 mm.
Further, referring to fig. 4, in an embodiment of the optical assembly 10 of the present invention, a width of the light distribution structure 111 in the length direction of the light guide plate 11 is defined as M2Then the condition is satisfied: m is not more than 0.1mm2Less than or equal to 0.3 mm; similarly, when the width of the light distribution structure 111 in the length direction of the light guide plate 11 is too small, on one hand, the formation of the light distribution structure 111 is inconvenient, and on the other hand, it cannot be guaranteed that most of the light rays entering the light guide plate 11 can be secondarily split through a critical plane between the light distribution structure 111 and the light guide plate 11; and when the width of the light distribution structure 111 in the length direction of the light guide plate 11 is excessively large,in the transportation or use process, the light guide plate 11 is easy to deform or even break, so that the use effect is influenced; therefore, the width of the light distribution structure 111 in the longitudinal direction of the light guide plate 11 is set to be 0.1mm to 0.3mm, which can effectively avoid the above problem.
Similarly, referring to fig. 5 in combination, in an embodiment of the optical assembly 10 of the present invention, the width of the light distribution structure 111 in the width direction of the light guide plate 11 is defined as M3Then the condition is satisfied: m is not more than 0.1mm3Less than or equal to 0.3 mm; similarly, when the width of the light distribution structure 111 in the width direction of the light guide plate 11 is too small, on one hand, the formation of the light distribution structure 111 is inconvenient, and on the other hand, it cannot be guaranteed that most of the light rays entering the light guide plate 11 can be secondarily split through a critical plane between the light distribution structure 111 and the light guide plate 11; when the width of the light distribution structure 111 in the width direction of the light guide plate 11 is too large, the light guide plate 11 is easily deformed or even broken during transportation or use, thereby affecting the use effect; therefore, the above-mentioned problem can be effectively avoided by setting the width of the light distribution structure 111 in the width direction of the light guide plate 11 to be between 0.1mm and 0.3 mm.
Referring to fig. 4 and fig. 5, in an embodiment of the optical assembly 10 of the present invention, the thickness of the light guide plate 11 is defined as H, and the following condition is satisfied: h is more than or equal to 1mm and less than or equal to 3 mm; when the thickness of the light guide plate 11 is too small, on one hand, the light emitted from the second light source 14 cannot sufficiently enter the light guide plate 11 from the side edge of the light guide plate 11, and on the other hand, the light entering the light guide plate 11 cannot be sufficiently diffused, so that the uniformity of the light emitted from the optical assembly 10 cannot be ensured; when the thickness of the light guide plate 11 is too large, the overall thickness of the optical assembly 10 is too large, and the overall thickness of the display device 1000 is too large, which is not favorable for miniaturization design; therefore, by setting the thickness of the light guide plate 11 to be 1mm to 3mm, the above-mentioned problem can be effectively avoided.
Referring to fig. 2 and fig. 3, in an embodiment of the optical assembly 10 of the present invention, at least one light splitting structure 12 is disposed on a top of the light guide plate 11, and each of the first light sources 13 is disposed opposite to one of the light splitting structures 12.
So set up, be provided with the light splitting structure 12 with first light source 13 relative setting through the top at light guide plate 11, so, light that first light source 13 sent can get into light splitting structure 12, then reflect or refract the light that first light source 13 sent through light splitting structure 12, carry out the secondary beam split to light through light splitting structure 12, the light-emitting angle of optical assembly 10 has just been enlarged, optical assembly 10's light-emitting homogeneity has further been guaranteed, and then effectively promote display device 1000's display effect.
The light splitting structure 12 is an optical lens capable of performing secondary light splitting on light, and the material of the light splitting structure may be one of light-transmitting materials such as polyethylene terephthalate and polymethyl methacrylate.
The light splitting structure 12 may be integrally formed on the top of the light guide plate 11, and of course, may be bonded to the top of the light guide plate 11 by using an optical adhesive.
Further, referring to fig. 2 and fig. 3 in combination, in an embodiment of the optical assembly 10 of the present invention, the bottom of the light splitting structure has a groove, each groove is disposed opposite to one of the avoiding holes, and a cross-sectional area of the groove is smaller than a cross-sectional area of the avoiding hole and larger than a cross-sectional area of the first light source.
So set up, among the light that first light source 13 sent, just, most light passes dodge hole 112 and kicks into the cell body of beam splitting structure 12, light gets into beam splitting structure 12 through the cell wall of cell body again, the area of the income plain noodles of beam splitting structure 12 has just been increased, make light take place refraction or reflection in cell body cell wall department, then carry out the beam splitting through beam splitting structure 12, so, the income light angle of beam splitting structure 12 has just been enlarged, thereby the play light angle of beam splitting structure 12 has been enlarged, and then can further guarantee optical assembly 10's light-emitting homogeneity.
Further, referring to fig. 2, in an embodiment of the optical assembly 10 of the present invention, the top of the light splitting structure 12 has an arc area recessed toward the first light source 13 for reflecting the light emitted from the first light source 13.
Compared with the planar arrangement, the area of the light splitting structure 12 is increased by providing the top of the light splitting structure 12 with the arc-shaped region which is concavely arranged towards the first light source 13, and light emitted by the first light source 13 can be reflected in the arc-shaped region after passing through the arc-shaped region at the top of the light splitting structure 12, so that the angle of the light emitted from the region is increased, and the light emitting angle of the optical component 10 is further enlarged; in addition, when the distance between the light guide plate 11 and the diffusion plate 40 is too small, the light-emitting uniformity of the backlight module 100 is poor, and thus the light-emitting uniformity of the display device 1000 is poor, so that the top of the light splitting structure has an arc-shaped region recessed toward the first light source 13, and at this time, after the light emitted by the first light source 13 reaches the arc-shaped region, most of the light is reflected between the arc-shaped region and the external critical surface to be reflected back to the bottom of the first light source 13, and then the light is reflected by the reflective sheet 50 located at the bottom of the first light source 13 and then emitted from the light guide plate 11 or other regions of the light splitting structure 12, so that the light-emitting angle of the optical assembly 10 can be effectively enlarged, and thus the overall brightness of the optical assembly 10 can be ensured, and the number of the first light sources 13 can be reduced, thereby reducing the manufacturing cost.
Referring to fig. 3, in another embodiment of the optical assembly 10 of the present invention, the top of the light splitting structure has an arc region protruding in a direction away from the first light source for refracting the light emitted from the first light source.
With such an arrangement, similarly, compared with a planar arrangement, the area of the light splitting structure 12 is also increased by providing the top of the light splitting structure 12 with the arc-shaped region protruding in the direction away from the first light source 13, and light emitted by the first light source 13 can be refracted in the arc-shaped region after passing through the arc-shaped region at the top of the light splitting structure 12, so that the angle of light emitted from the region is increased, and the light emitting angle of the optical component 10 is further enlarged; in addition, the light emitted by the first light source 13 is strong and concentrated at the front surface and weak and scattered at the side surface, so that the light emitted by the optical assembly 10 is not uniform; based on this, through making the top of light splitting structure 12 have towards the protruding arc region of establishing of the direction of keeping away from first light source 13, and first light source 13 is relative with this arc region, so, among the light that first light source 13 sent, the strong and concentrated light in front has most light to take place the refraction in arc region department after arriving the arc region, so that light to the side diffusion, just enlarged the exit angle of light, and then effectively enlarged the light-emitting angle of optical component 10, and, still alleviated light and presented strong and concentrated, the side is weak and dispersed state of front.
For example, the surface of the arc-shaped area may be a conical surface or a spherical surface, etc.
Of course, in other embodiments, the top of the light splitting structure 12 may also have an uneven arc region, and similarly, compared with a planar arrangement, by making the top of the light splitting structure 12 have an uneven arc region, the area of the light splitting structure 12 is also increased, and after the light emitted by the first light source 13 passes through the arc region at the top of the light splitting structure 12, the light may be reflected and refracted in the arc region, so that the angle of the light emitted from the region is increased, and the light emitting angle of the optical assembly 10 is further enlarged.
It should be noted that the light splitting structure 12 has a light emitting surface 121, the light emitting surface 121 has a first light emitting area 1211 and a second light emitting area 1212 connected to each other, the first light emitting area 1211 is disposed around the second light emitting area 1212 and is connected to the top of the light guide plate 11, the second light emitting area 1212 is an arc-shaped area, and the first light emitting area 1211 and the second light emitting area 1212 are both disposed toward the light emitting surface of the first light source 13 and are configured to receive and reflect or refract light emitted by the first light source 13. The second light emitting area 1212 corresponds to an arc-shaped area that is concavely or convexly arranged at the top of the light splitting structure.
Moreover, as shown in fig. 2, the first light emitting region 1211 includes a flat region and an arc region, the flat region surrounds the second light emitting region 1212 and is connected to the second light emitting region 1212, and the arc region surrounds the flat region and is connected to the flat region and the top of the light guide plate 11, so that, of the light emitted by the first light source 13, the light reflected by the second light emitting region 1212 can directly pass through the flat region and reach the reflective sheet 50 at the bottom of the first light source 13, so as to reduce the energy consumption of the light; the light reaching the arc region can be refracted to ensure the brightness of the peripheral side of the light splitting structure 12, thereby effectively ensuring the uniformity of the light output of the optical component 10.
Alternatively, as shown in fig. 3, the first light emitting area 1211 includes a flat region and an arc region, the arc region surrounds the second light emitting area 1212 and is connected to the second light emitting area 1212, and the flat region surrounds the arc region and is connected to the arc region and the top of the light guide plate 11, so that, of the light emitted from the first light source 13, the light can pass through the flat region or the arc region of the first light emitting area 1211 or the second light emitting area 1212, so as to fully diffuse the light.
Further, referring to fig. 2 and fig. 3 in combination, in an embodiment of the optical assembly 10 of the present invention, an orthogonal projection of the second light exiting region 1212 on a predetermined projection plane covers an orthogonal projection of the first light source 13 on the predetermined projection plane, where the predetermined projection plane is a plane where the bottom of the light guide plate 11 is located.
So set up, cover the orthographic projection of first light source 13 on predetermineeing the projection plane through making the orthographic projection of second light-emitting area 1212 on predetermineeing the projection plane, then, among the light that first light source 13 sent, have most light to reach second light-emitting area 1212 to carry out effective grading to light through second light-emitting area 1212.
Referring to fig. 6 and fig. 7, the present invention further provides a backlight module 100, the backlight module 100 includes a back plate 20, a middle frame 30, a diffusion plate 40, an optical film, and the optical assembly 10 as described above, and the optical assembly 10 is described in detail in the foregoing embodiments. Since the backlight module 100 adopts all the technical solutions of the foregoing embodiments, at least all the beneficial effects brought by all the technical solutions of the foregoing embodiments are achieved, and no further description is given here. The middle frame 30 is arranged around the back plate 20 and forms a mounting groove with the back plate 20; the optical assembly 10 is arranged in the mounting groove, and the light emitting side of the optical assembly 10 faces the notch of the mounting groove; the diffusion plate 40 is disposed in the mounting groove and located on a side of the optical assembly 10 facing away from the bottom of the mounting groove.
In this embodiment, during the assembly process, the optical assembly 10, the diffusion plate 40 and the optical film are all mounted in the mounting groove formed by the enclosure of the back plate 20 and the middle frame 30, and the light emitted from the optical assembly 10 can sequentially pass through the diffusion plate 40 and the optical film.
The backlight module 100 of the present invention further includes a reflective sheet 50, wherein the reflective sheet 50 is disposed at the bottom of the second light source 14, and a portion of the light reaching the light guide plate 11 can be reflected to the reflective sheet 50, and then is secondarily reflected by the reflective sheet 50 to perform secondary light distribution on the portion of the light, and a portion of the light reaching the light splitting structure 12 can also be reflected to the reflective sheet 50, and then is secondarily reflected by the reflective sheet 50 to perform secondary light distribution on the portion of the light. The backlight module 100 further includes an optical film disposed in the mounting groove and located on a side of the diffusion plate 40 facing away from the optical assembly 10.
Referring to fig. 7, in an embodiment of the backlight module 100 of the present invention, at least one light splitting structure 12 is disposed at the top of the light guide plate 11, and each of the first light sources 13 is disposed opposite to one of the light splitting structures 12; defining a distance L between the light guide plate 11 of the optical assembly 10 and the diffusion plate 40; when L is less than or equal to 25mm, the top of the light splitting structure 12 has an arc area recessed toward the first light source 13, and the arc area is used for reflecting light rays emitted by the first light source 13; when L > 25mm, the top of the light splitting structure 12 has an arc-shaped region protruding in a direction away from the first light source 13, for refracting the light emitted by the first light source 13.
When the distance between the light guide plate 11 of the optical assembly 10 and the diffusion plate 40 is less than or equal to 25mm, the light-emitting uniformity of the backlight module 100 is poor, and thus the light-emitting uniformity of the display device 1000 is poor, so that most of the light rays are reflected between the optical structure and the external critical surface to be reflected back to the bottom of the first light source 13, and then are reflected by the reflection sheet 50 at the bottom of the first light source 13 and then emitted out from other areas of the light guide plate 11 or the light splitting structure 12, so that the light-emitting angle of the optical assembly 10 can be effectively enlarged; when the distance between the light guide plate 11 of the optical assembly 10 and the diffusion plate 40 is greater than 25mm, most of the light rays are refracted between the optical structure and the external critical surface, so that the light rays are diffused to the side surface, the emergent angle of the light rays is enlarged, and the light-emitting angle of the optical assembly 10 is further effectively enlarged.
Referring to fig. 8, the present invention further provides a display device 1000, the display device 1000 includes a display panel 200 and the backlight module 100 as described above, and the specific structure of the backlight module 100 is described in detail in the foregoing embodiments. Since the display device 1000 adopts all the technical solutions of the foregoing embodiments, at least all the beneficial effects brought by all the technical solutions of the foregoing embodiments are achieved, and no further description is given here. The display panel 200 is disposed on a side of the diffusion plate 40 facing away from the optical assembly 10.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention, and all modifications and equivalents of the present invention, which are made by the contents of the present specification and the accompanying drawings, or directly/indirectly applied to other related technical fields, are included in the scope of the present invention.
Claims (10)
1. An optical assembly, comprising:
the bottom of the light guide plate is provided with at least one avoidance hole penetrating to the top;
the first light source is arranged at the bottom of the light guide plate, and each first light source is opposite to one avoidance hole; and
the second light source is arranged on the side edge of the light guide plate, and a light emitting surface of the second light source faces the side edge of the light guide plate.
2. The optical assembly according to claim 1, wherein a light distribution structure is formed in the light guide plate.
3. An optical assembly according to claim 2, wherein a plurality of said light distribution structures are provided, and a plurality of said light distribution structures are provided at intervals.
4. The optical assembly of claim 1, wherein the relief hole has a cross-sectional area greater than a cross-sectional area of the first light source.
5. The optical assembly according to claim 1, wherein the top of the light guide plate is provided with at least one light splitting structure, and each of the first light sources is disposed opposite to one of the light splitting structures.
6. The optical assembly according to claim 5, wherein the bottom of the light splitting structure has a groove, each groove is opposite to one of the avoiding holes, and the cross-sectional area of the groove is smaller than that of the avoiding hole and larger than that of the first light source.
7. The optical assembly of claim 6, wherein the top of the light splitting structure has an arc-shaped area recessed toward the first light source for reflecting light emitted from the first light source;
or the top of the light splitting structure is provided with an arc-shaped area which is convexly arranged in the direction far away from the first light source and is used for refracting the light rays emitted by the first light source.
8. A backlight module, comprising:
a back plate;
the middle frame is arranged around the back plate and forms an installation groove with the back plate in an enclosing manner;
the optical assembly of any one of claims 1 to 7, the optical assembly being disposed in the mounting groove with the light exit side of the optical assembly disposed toward the notch of the mounting groove; and
the diffusion plate is arranged in the mounting groove and is positioned on one side of the optical assembly, which is back to the bottom of the mounting groove.
9. The backlight module as claimed in claim 8, wherein the top of the light guide plate is provided with at least one light splitting structure, and each of the first light sources is disposed opposite to one of the light splitting structures; defining the distance between the light guide plate of the optical assembly and the diffusion plate to be L;
when L is less than or equal to 25mm, the top of the light splitting structure is provided with an arc-shaped area which is concavely arranged towards the direction of the first light source and is used for reflecting light rays emitted by the first light source;
when L is larger than 25mm, the top of the light splitting structure is provided with an arc-shaped area which is convexly arranged in the direction far away from the first light source and is used for refracting the light rays emitted by the first light source.
10. A display device comprising a display panel and the backlight module according to claim 8 or 9, wherein the display panel is disposed on a side of the diffusion plate facing away from the optical assembly.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210122990.0A CN114217479B (en) | 2022-02-09 | 2022-02-09 | Optical assembly, backlight module and display device |
| PCT/CN2023/075041 WO2023151599A1 (en) | 2022-02-09 | 2023-02-08 | Optical assembly, backlight module and display device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210122990.0A CN114217479B (en) | 2022-02-09 | 2022-02-09 | Optical assembly, backlight module and display device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114217479A true CN114217479A (en) | 2022-03-22 |
| CN114217479B CN114217479B (en) | 2024-05-07 |
Family
ID=80708817
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210122990.0A Active CN114217479B (en) | 2022-02-09 | 2022-02-09 | Optical assembly, backlight module and display device |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN114217479B (en) |
| WO (1) | WO2023151599A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2023151599A1 (en) * | 2022-02-09 | 2023-08-17 | 深圳创维－Rgb电子有限公司 | Optical assembly, backlight module and display device |
Citations (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TW201222092A (en) * | 2010-11-18 | 2012-06-01 | Young Lighting Technology Corp | Light source module and illumination apparatus |
| CN102566139A (en) * | 2010-12-28 | 2012-07-11 | 歌尔声学股份有限公司 | LED (Light-Emitting Diode) backlight display equipment |
| CN104251417A (en) * | 2013-06-28 | 2014-12-31 | 展晶科技(深圳)有限公司 | Light source module |
| CN104748021A (en) * | 2013-12-31 | 2015-07-01 | 欧普照明股份有限公司 | LED lighting device |
| KR20150093037A (en) * | 2014-02-06 | 2015-08-17 | 주식회사 루멘스 | Light emitting device package module, backlight unit and lighting device |
| CN105278160A (en) * | 2015-10-29 | 2016-01-27 | 深圳市华星光电技术有限公司 | Backlight unit, backlight module and display device |
| CN106681052A (en) * | 2016-11-16 | 2017-05-17 | 京东方科技集团股份有限公司 | Backlight module and display device |
| CN106886106A (en) * | 2017-02-16 | 2017-06-23 | 广州毅昌科技股份有限公司 | A kind of ultrathin backlight module |
| CN109118953A (en) * | 2018-07-25 | 2019-01-01 | 青岛海信电器股份有限公司 | A kind of down straight aphototropism mode set |
| CN209356814U (en) * | 2019-03-25 | 2019-09-06 | 深圳创维－Rgb电子有限公司 | Down straight aphototropism mode set, liquid crystal module and display device |
| CN210894931U (en) * | 2019-12-11 | 2020-06-30 | 合肥惠科金扬科技有限公司 | Backlight module and display device |
| CN213240750U (en) * | 2020-09-16 | 2021-05-18 | 惠州视维新技术有限公司 | Backlight module and display device |
| CN214427709U (en) * | 2021-03-31 | 2021-10-19 | 深圳创维－Rgb电子有限公司 | Backlight module and display device |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101295037A (en) * | 2007-04-27 | 2008-10-29 | 鸿富锦精密工业（深圳）有限公司 | Back light module and optical plate |
| CN203249080U (en) * | 2013-03-18 | 2013-10-23 | 晶科电子（广州）有限公司 | Direct lighting type backlight module |
| WO2016092678A1 (en) * | 2014-12-11 | 2016-06-16 | 堺ディスプレイプロダクト株式会社 | Lighting device and display device |
| CN107656398A (en) * | 2017-10-13 | 2018-02-02 | 惠州市华星光电技术有限公司 | Liquid crystal display and its backlight module |
| CN114217479B (en) * | 2022-02-09 | 2024-05-07 | 深圳创维－Rgb电子有限公司 | Optical assembly, backlight module and display device |
-
2022
- 2022-02-09 CN CN202210122990.0A patent/CN114217479B/en active Active
-
2023
- 2023-02-08 WO PCT/CN2023/075041 patent/WO2023151599A1/en unknown
Patent Citations (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TW201222092A (en) * | 2010-11-18 | 2012-06-01 | Young Lighting Technology Corp | Light source module and illumination apparatus |
| CN102566139A (en) * | 2010-12-28 | 2012-07-11 | 歌尔声学股份有限公司 | LED (Light-Emitting Diode) backlight display equipment |
| CN104251417A (en) * | 2013-06-28 | 2014-12-31 | 展晶科技(深圳)有限公司 | Light source module |
| CN104748021A (en) * | 2013-12-31 | 2015-07-01 | 欧普照明股份有限公司 | LED lighting device |
| KR20150093037A (en) * | 2014-02-06 | 2015-08-17 | 주식회사 루멘스 | Light emitting device package module, backlight unit and lighting device |
| CN105278160A (en) * | 2015-10-29 | 2016-01-27 | 深圳市华星光电技术有限公司 | Backlight unit, backlight module and display device |
| CN106681052A (en) * | 2016-11-16 | 2017-05-17 | 京东方科技集团股份有限公司 | Backlight module and display device |
| CN106886106A (en) * | 2017-02-16 | 2017-06-23 | 广州毅昌科技股份有限公司 | A kind of ultrathin backlight module |
| CN109118953A (en) * | 2018-07-25 | 2019-01-01 | 青岛海信电器股份有限公司 | A kind of down straight aphototropism mode set |
| CN209356814U (en) * | 2019-03-25 | 2019-09-06 | 深圳创维－Rgb电子有限公司 | Down straight aphototropism mode set, liquid crystal module and display device |
| CN210894931U (en) * | 2019-12-11 | 2020-06-30 | 合肥惠科金扬科技有限公司 | Backlight module and display device |
| CN213240750U (en) * | 2020-09-16 | 2021-05-18 | 惠州视维新技术有限公司 | Backlight module and display device |
| CN214427709U (en) * | 2021-03-31 | 2021-10-19 | 深圳创维－Rgb电子有限公司 | Backlight module and display device |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2023151599A1 (en) * | 2022-02-09 | 2023-08-17 | 深圳创维－Rgb电子有限公司 | Optical assembly, backlight module and display device |
Also Published As
| Publication number | Publication date |
|---|---|
| CN114217479B (en) | 2024-05-07 |
| WO2023151599A1 (en) | 2023-08-17 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP5360172B2 (en) | Planar light source device and display device using the same | |
| US7560745B2 (en) | LED package and backlight assembly for LCD comprising the same | |
| KR101621013B1 (en) | Display device | |
| KR101013532B1 (en) | Light guide plate | |
| US7374329B2 (en) | Light guide device and a backlight module using the same | |
| US7334934B2 (en) | Light guide device and a backlight module using the same | |
| KR101229874B1 (en) | Optic lens, optic package, backlight assembly and display device having the same | |
| KR100898100B1 (en) | Prism sheet | |
| US20030058381A1 (en) | Image display device and front light | |
| KR20190042719A (en) | A light guide plate, a surface light source device, a display device, and an electronic device | |
| US9274265B2 (en) | Surface light source apparatus and display apparatus using same | |
| JP4523530B2 (en) | Surface light source device and display device | |
| WO2011065052A1 (en) | Planar lighting device and display device having same | |
| JP2009164101A (en) | Backlight | |
| JP4423933B2 (en) | Optical sheet and backlight unit and display using the same | |
| US20080266898A1 (en) | Optical plate and backlight module using the same | |
| CN114217479B (en) | Optical assembly, backlight module and display device | |
| CN111240092A (en) | Display device | |
| US20210003882A1 (en) | Display appartus and diffuser plate thereof | |
| CN113064301A (en) | Display device | |
| JP7446065B2 (en) | display device | |
| KR20150014195A (en) | Bottom chasis, fabricating method thereof and display apparatus having the same | |
| CN114442216A (en) | Backlight module and display device | |
| CN113934058B (en) | Optical assembly, backlight module and display device | |
| CN210270457U (en) | Backlight module, display module and display device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |