CN114415426A - Mini LED module and display device thereof - Google Patents
Mini LED module and display device thereof Download PDFInfo
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- CN114415426A CN114415426A CN202210146832.9A CN202210146832A CN114415426A CN 114415426 A CN114415426 A CN 114415426A CN 202210146832 A CN202210146832 A CN 202210146832A CN 114415426 A CN114415426 A CN 114415426A
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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
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
- F21V7/00—Reflectors for light sources
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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
- G02F1/133605—Direct backlight including specially adapted reflectors
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
- G02F1/1336—Illuminating devices
- G02F1/133602—Direct backlight
- G02F1/133606—Direct backlight including a specially adapted diffusing, scattering or light controlling members
- G02F1/133607—Direct backlight including a specially adapted diffusing, scattering or light controlling members the light controlling member including light directing or refracting elements, e.g. prisms or lenses
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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
- G02F1/133611—Direct backlight including means for improving the brightness uniformity
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
- G09F9/00—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21Y—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO THE FORM OR THE KIND OF THE LIGHT SOURCES OR OF THE COLOUR OF THE LIGHT EMITTED
- F21Y2115/00—Light-generating elements of semiconductor light sources
- F21Y2115/10—Light-emitting diodes [LED]
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- Physics & Mathematics (AREA)
- Nonlinear Science (AREA)
- General Physics & Mathematics (AREA)
- Mathematical Physics (AREA)
- Chemical & Material Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Optics & Photonics (AREA)
- Engineering & Computer Science (AREA)
- Theoretical Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Illuminated Signs And Luminous Advertising (AREA)
- Planar Illumination Modules (AREA)
Abstract
The invention provides a Mini LED module and a display device thereof, wherein the Mini LED module comprises: a reflective sheet; the light emitting diode is embedded on the reflecting sheet; a light scattering part arranged on the reflector plate; the light diffusion part comprises a light transmission film and a reflecting lens; the reflecting lens is used for covering the light-emitting diodes, and the reflecting lens and the light-emitting diodes are arranged in a one-to-one correspondence manner; the upper surface of the reflecting lens is concave; the reflecting lens upwards exceeds the light-transmitting film, and the circumferential direction of the reflecting lens is a smooth surface; the printing opacity membrane is used for laying the surface at the reflector plate, and the printing opacity membrane all is connected with each reflection lens, sets up a plurality of light trap that run through on the printing opacity membrane. The most light that reaches the reflection lens upper surface can propagate downwards through the reflection to go out along reflection lens's global refraction, partial light is direct goes out from reflection lens's global refraction, through the reflection of reflector plate, makes light mixed, thereby obtains the face light energy of relative even.
Description
Technical Field
The invention relates to the field of Mini LEDs, in particular to a Mini LED module and display equipment thereof.
Background
The Mini LED (sub-millimeter Light Emitting Diode) technology is a new backlight module technology, which realizes area dimming in a smaller range by a large number of densely-distributed LEDs (Light-Emitting diodes, abbreviated as LEDs), and compared with the conventional backlight design, the Mini LED (sub-millimeter Light Emitting Diode) technology can realize better brightness uniformity, higher color contrast, higher brightness index in a smaller Light mixing distance, and can flexibly realize various partition display effects.
With the rapid development of the Mini LED display technology, the Mini LED display products have been applied to ultra-large screen high definition display, such as commercial fields of monitoring and commanding, high definition broadcasting, high-end cinema, medical diagnosis, advertisement display, conference exhibition, office display, virtual reality, etc.
The Mini LED backlight technology has obvious advantages, but it also has some obvious technical defects at the display application end: 1. the light mixing distance is small, and the light energy is unevenly distributed to form the characteristic of alternate light and shade. 2. The light energy of the splicing seams of the lamp panel is lost to display dark bands. 3. The traditional Mini LED module has a large number of LEDs, a thick PCB (Printed Circuit Board) plate, and a high cost.
Therefore, the prior art has defects and needs to be improved and developed.
Disclosure of Invention
In view of the above disadvantages of the prior art, an object of the present invention is to provide a Mini LED module and a display device thereof, which aim to solve the problem of poor display effect of the Mini LED module in the prior art.
The technical scheme adopted by the invention for solving the technical problem is as follows:
a Mini LED module, comprising:
a reflective sheet;
the light emitting diode is embedded on the reflecting sheet;
a light scattering part disposed on the reflective sheet; the light diffusion part comprises a light transmission film and a reflecting lens; the reflecting lens is used for covering the light emitting diodes, and the reflecting lens and the light emitting diodes are arranged in a one-to-one correspondence manner; the upper surface of the reflecting lens is concave; the reflecting lens upwards exceeds the light-transmitting film, and the circumferential direction of the reflecting lens is a smooth surface; the light-transmitting film is used for being laid on the surface of the reflector plate and is connected with the reflector lenses, and a plurality of light-transmitting holes penetrating through the light-transmitting film are formed in the light-transmitting film.
Further, the upper surface of the reflection lens is a frosted surface.
Further, the reflection lens is in a truncated cone shape, and the peripheral surface of the reflection lens gradually shrinks towards the axis along the direction of height increase.
Furthermore, the bottom surface of the reflecting lens is provided with a mounting hole, and the light emitting diode is arranged in the corresponding mounting hole; the mounting hole extends upwards, and the height of the mounting hole is smaller than that of the reflecting lens.
Furthermore, the density of the light holes between any two adjacent reflecting lenses is gradually increased from the middle to the two ends.
Furthermore, the reflecting lens and the light-transmitting film are both made of polyester resin.
Further, the reflecting lens and the light-transmitting film are integrally formed.
Further, the Mini LED module also comprises a PCB and a back plate;
the PCB is provided with a plurality of blocks, the PCBs are spliced with one another and arranged below the reflecting sheet, the light-emitting diodes are arranged on the corresponding PCBs, and the top ends of the light-emitting diodes outwards exceed the reflecting sheet.
Further, the top end of the splicing part of any two adjacent PCB boards is covered by the light scattering part.
The invention also provides a display device which comprises the Mini LED module.
According to the technical scheme, the invention has at least the following advantages and positive effects:
in the invention, the reflecting lens covers the light-emitting diode, the light emitted by the light-emitting diode enters the reflecting lens, and the upper surface of the reflecting lens is in a concave state, so that most of the light reaching the upper surface of the reflecting lens can be transmitted downwards after being reflected. The reflection lens upwards exceeds the light-transmitting film, and the circumferential surface of the reflection lens is a smooth surface, so that light reflected downwards from the upper surface of the reflection lens can be refracted out along the circumferential surface of the reflection lens, and part of light rays are directly refracted out from the circumferential surface of the reflection lens. The outgoing light is refracted from the peripheral surface of the reflecting lens in an inclined downward state and reaches the surface of the reflecting sheet along the light transmitting hole, and the light path can be increased through reflection of the reflecting sheet, so that the light rays are mixed, and relatively uniform surface light energy is obtained.
Drawings
Fig. 1 is a schematic view of the light emitting angle of a diode.
Fig. 2 is a schematic structural diagram of a conventional Mini LED module.
Fig. 3 is a schematic structural diagram of a Mini LED module according to an embodiment of the invention.
Fig. 4 is a schematic structural diagram of a light scattering portion according to an embodiment of the invention.
FIG. 5 is a schematic view illustrating light propagation of the light scattering portion according to an embodiment of the invention.
Fig. 6 is a schematic diagram illustrating the distribution of the density and the illumination intensity of the light holes in an embodiment of the invention, wherein the origin of the coordinate system is the midpoint of two adjacent reflective lenses.
FIG. 7 is a schematic view of light propagating on the transparent film and the reflective sheet according to an embodiment of the invention.
Description of reference numerals:
100. a Mini LED module;
1. a reflective sheet; 2. a light emitting diode; 3. a light scattering section; 31. a light transmissive film; 311. a light-transmitting hole; 32. a reflective lens; 322. mounting holes; 4. a membrane; 5. a diffusion plate; 6. a back plate; 7. a PCB board;
200. traditional Mini LED module.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.
Referring to fig. 1, in the prior art, the light-emitting angle of the single led 2 is usually about 120 °, and the light energy is mainly concentrated in the forward direction of the light-emitting surface and is weaker as the light energy is closer to the edge. Referring to fig. 2, the light mixing distance H of the conventional Mini LED module 200 in the prior art is usually about 5mm, so that the light reaching the diffusion plate is distributed densely and sparsely, the forward region of the light emitting diodes 2 is a highlight region S1, and the region between two adjacent light emitting diodes 2 is a dark region S2, thereby forming the alternating bright and dark visual effect characteristics. Moreover, the splicing part of two adjacent PCBs is lack of a light source, so that a gap dark band S appears above the splicing part, and the slightly dark region S2 and the gap dark band S seriously affect the image quality of the traditional Mini LED module 200 in the prior art, and restrict the development of the Mini LED technology to a certain extent.
Referring to fig. 3, in an embodiment of the present invention, a Mini LED module 100 is disclosed, where the Mini LED module 100 includes a groove-shaped back plate 6, a PCB 7 disposed in the back plate 6, a light emitting diode 2 electrically connected to the PCB 7 and disposed on a surface of the PCB 7, a reflector plate 1 adhered to a surface of the PCB 7, a light scattering portion 3 adhered to a surface of the reflector plate 1, a diffuser plate 5 covering an opening of the groove of the back plate 6, and a diaphragm 4 adhered to the diffuser plate 5. The back plate 6 is a basic assembly platform and is approximately in a groove shape, the PCB board 7 is installed in the groove formed by the back plate 6, the plurality of light emitting diodes 2 are arranged, and each light emitting diode 2 is installed on the PCB board 7 and is electrically connected with the PCB board 7. The reflector plate 1 is laid on the PCB 7, and a through hole is formed in the position, corresponding to the light emitting diode 2, of the reflector plate 1, so that the light emitting diode 2 is embedded on the reflector plate 1. The end of the reflection sheet 1 is disposed obliquely to reflect light reaching thereto upward to the diffusion plate 5. The light scattering portion 3 is laid on the reflective sheet 1. The diffusion plate 5 is covered above the back plate 6 to close the opening of the groove formed by the back plate 6, and the diffusion plate 5 and the light emitting diode 2 are arranged at intervals along the vertical direction. The membrane 4 is attached to the upper side of the backlight plate.
Referring to fig. 4 and 5, the light scattering part 3 includes a light transmissive film 31 and a reflective lens 32, wherein an edge of the reflective lens 32 is connected to the light transmissive film 31. The reflecting lens 32 covers the light emitting diodes 2, a plurality of reflecting lenses 32 are provided, and each reflecting lens 32 is arranged in one-to-one correspondence with each light emitting diode 2. The light emitted from the led 2 enters the reflective lens 32, and the upper surface of the reflective lens 32 is concave, so that most of the light reaching the upper surface of the reflective lens 32 is reflected and propagates downward. The reflection lens 32 protrudes upwards beyond the light-transmitting film 31, and the circumference of the reflection lens 32 is a smooth surface, where the smooth surface means that the roughness of the circumferential surface of the reflection lens 32 is small, so as to facilitate the refraction of light. Therefore, the light reflected downward from the upper surface of the reflection lens 32 is refracted in the circumferential direction of the reflection lens 32, which is the circular arc surface on the circumferential side of the reflection lens 32.
Part of the light is refracted directly from the circumferential direction of the reflecting lens 32. The light-transmitting film 31 is transparent and has high light transmittance. The light-transmitting film 31 is used for being laid on the surface of the reflector 1, and a plurality of light-transmitting holes 311 are formed in the light-transmitting film 31. The outgoing light is refracted from the peripheral surface of the reflection lens 32 in an obliquely downward state and reaches the surface of the reflection sheet 1 along the light transmission hole 311, and the light path is increased by reflection of the reflection sheet 1, so that the light is mixed, and relatively uniform surface light energy is obtained.
The light rays refracted by the side surfaces of two adjacent reflecting lenses 32 are converged in the region between the two reflecting lenses 32. Referring to fig. 3, the light refracted by the peripheral surface of the left-side reflection lens 32 obliquely downward reaches the middle area of the two reflection lenses 32 along the right side thereof, the light refracted by the peripheral surface of the right-side reflection lens 32 obliquely downward reaches the middle area of the two reflection lenses 32 along the left side thereof, and the light in the middle area is mixed more uniformly due to the different angles of the light refracted by the two adjacent reflection lenses 32.
The membrane 4 is a thin-film structure having a plurality of layers. The membrane 4 is used for improving the optical efficiency and reducing stray light. The detailed structure of the diaphragm 4 can be referred to the related art, and is not described in detail herein.
The diffusion plate 5 is plate-shaped and is used for scattering light flux and uniformly distributing light. The detailed structure of the diffusion plate 5 and its connection with the diaphragm 4 and the back plate 6 can be referred to the related art, and will not be described in detail herein.
The reflection sheet 1 is in the form of a film, and the reflection sheet 1 has a plurality of air bubbles in the thickness direction thereof. The reflectance r due to light energy is: r ═ n1-n22/(n1+n2)2Where n1 and n2 are the true refractive indices of the two media, respectively. Setting N as the number of bubble layers through which the light energy passes, the total reflectivity R of the bubble layers to the light energy is as follows: r1- (1-R)NWhere R is the reflectivity and N is the number of dielectric layers, it can be seen from the equation that the greater the number N of bubble layers through which light can pass, the closer the total reflectivity R is to 100%, so that the multilayer bubble structure in the reflector sheet 1 can reflect the most of the light irradiated to the surface thereof. Therefore, the light refracted from the peripheral surface of the reflection lens 32 can reach the surface of the reflection sheet 1 through the light transmission holes 311 of the light transmission film 31, and is reflected to the diffusion plate 5 through the reflection sheet 1.
Referring to fig. 4, as an implementation manner of this embodiment, the upper surface of the reflection lens 32 is a frosted surface, so that the upper surface of the reflection lens 32 has a certain roughness, and thus has a capability of diffuse reflection. When the light that emitting diode 2 sent arrives through the air reflection lens 32's surface, light takes place the diffuse reflection here to break up light here, light can follow after the multiple reflection the global refraction of reflection lens 32 goes out, thereby realizes reaching through the perforation on reflector plate 1, thereby in order to realize the reflection.
Moreover, since the upper surface of the reflecting lens 32 is concave, it has a diverging effect on a small amount of light refracted from the upper surface of the reflecting lens 32, so that the light refracted from the top can be uniformly diffused outward.
Referring to fig. 4, as an implementation manner of this embodiment, the reflection lens 32 is in a circular truncated cone shape, and a peripheral surface of the reflection lens gradually shrinks toward an axis along a height increasing direction, that is, two side edges of an axial cross-sectional view of the reflection lens 32 are in an inclined state, and a top end of the reflection lens is close to the axis of the reflection lens 32. After the light entering the inside of the reflection lens 32 is reflected for multiple times and refracted out from the peripheral surface of the reflection lens 32, the angle of the light is inclined downwards, so that the refracted out light can reach the reflection sheet 1 conveniently.
Referring to fig. 4, as an implementation manner of this embodiment, a mounting hole 322 is formed on a bottom surface of the reflection lens 32, and the light emitting diode 2 is disposed in the corresponding mounting hole 322, so that the reflection lens 32 covers the light emitting diode 2. The mounting hole 322 extends upward and has a height smaller than that of the reflection lens 32, so that the light emitted from the light emitting diode 2 can enter the reflection lens 32 in the path of air → the reflection lens 32. The contour of the mounting hole 322 is approximately semi-elliptical, so that light emitted by the light emitting diode 2 at different angles can enter the reflecting lens 32 at different angles along the surface of the mounting hole 322, and most of the light entering the reflecting lens 32 can be emitted from the peripheral surface of the reflecting lens 32.
Referring to fig. 5 and fig. 6, as an implementation manner of the present embodiment, the density of the light holes 311 between any two adjacent reflection lenses 32 gradually increases from the middle to both ends. Referring to fig. 3, a rectangular coordinate system is established with the middle position of two adjacent reflection lenses 32, where I is the illumination intensity, ρ is the density of the light holes 311, after the light is refracted from the reflection lenses 32, the illumination intensity between two adjacent reflection lenses 32 is the maximum in the middle area of the two reflection lenses 32, and the illumination intensity gradually decreases from the middle area to the two sides. Light refracted by the reflecting lens 32 reaches the surface of the reflector plate 1 through the light hole 311, forms divergent light energy to be emitted upwards after being reflected and scattered by the reflector plate 1, effectively increases the optical path, and is beneficial to light mixing. The density of the light holes 311 between any two adjacent reflecting lenses 32 is gradually increased from the middle to two ends, the light holes 311 with lower density are arranged in the middle area, part of light energy enters the light-transmitting film 31 and is totally reflected and consumed in the light-transmitting film, effective light energy cannot be formed, the light mixing effect of the middle area can be reduced, the light holes 311 with higher density are arranged at two ends to increase the light mixing effect of the two ends, the light energy reaching the reflector plate 1 is uniformly redistributed through the arrangement design of the light holes 311 in a sparse and dense mode, a relatively uniform surface light source is obtained on the diffusion plate 5, and the characteristic that light and shade are alternated on the diffusion plate 5 is avoided.
The density of the light-transmitting holes 311 is achieved by the number of the light-transmitting holes 311, that is, a smaller number of the light-transmitting holes 311 are provided in the middle area between the two reflective lenses 32, and the number of the light-transmitting holes 311 increases from the middle area to the two ends.
In some embodiments, the light mixing can also be achieved by changing the size of the light-transmitting holes 311, that is, the light-transmitting holes 311 with a smaller area are arranged in the middle area between the two reflecting lenses 32, and by changing the duty ratio on the light-transmitting film 31. The duty ratio is equal to the area of the light holes 311 on the carrier film divided by the total area of the carrier film.
Moreover, the conventional Mini LED module 200 is provided with a large number of LEDs 2, which results in a thick PCB 7 and high cost. Compared with the prior art, the Mini LED module 100 provided by the application can increase the arrangement distance of the light emitting diodes 2 due to the increase of the light mixing effect, so that the total number of the light emitting diodes 2 is reduced, and meanwhile, the thickness of the PCB 7 can be correspondingly reduced, so that the cost is reduced.
As an implementation manner of this embodiment, the reflective lens 32 and the light-transmitting film 31 are made of polyester resin (also called PET, Polyethylene terephthalate, for short). Because the polyester resin has good mechanical properties, the reflection lens 32 and the light transmission film 31 made of the polyester resin have good impact strength and tensile properties, so that the reflection lens 32 and the light transmission film 31 are conveniently installed on the reflector plate 1. The polyester resin has high transparency and small glossiness, the reflection lens 32 and the light transmission film 31 made of the polyester resin have good optical characteristics, and light energy is transmitted in the reflection lens 32 and the light transmission film 31, so that the loss is small. Moreover, the polyester resin also has excellent high and low temperature resistance, oil resistance, fat resistance, dilute acid resistance, diluted alkali resistance and most solvent resistance, so that the reflecting lens 32 and the light-transmitting film 31 made of the polyester resin have better stability, and cannot expand or contract and deform due to the rise or the reduction of the environmental temperature.
In other embodiments, the material of the reflective lens 32 and the transparent film 31 may also be Polystyrene (PS) or Polycarbonate (PC).
The reflective lens 32 is integrally formed with the light transmissive film 31. In this embodiment, the reflective lens 32 and the light-transmitting film 31 are made of polyester resin, specifically, polyester resin particles are processed into the light scattering part 3 by a precision injection molding technology, that is, the reflective lens 32 and the light-transmitting film 31 are integrally formed by the precision injection molding technology, so that the reflective lens 32 is prevented from being bonded to the light-transmitting film 31 after the reflective lens 32 and the light-transmitting film 31 are separately produced, and the precision injection molding can improve the production efficiency and reduce the installation steps. The specific steps and processing techniques of the precision injection molding technology can be referred to related technologies, and are not described in detail herein.
Referring to fig. 3, as an implementation manner of this embodiment, the PCB board 7 is provided with a plurality of pieces, and the PCB boards 7 are spliced with each other and disposed below the reflection sheet 1. The light emitting diodes 2 are arranged on the corresponding PCB 7, and the top end of each light emitting diode 2 extends out of the reflector plate 1, so that the light emitted by the light emitting diode 2 can be dispersed through the light dispersing part 3 and can be emitted to the reflector plate 1.
Referring to fig. 3, as an implementation manner of this embodiment, the top end of the joint of any two adjacent PCB boards 7 is covered by the light scattering portion 3. Because the light-transmitting film 31 is laid above the PCB 7, under the combined action of the light-transmitting holes 311 and the reflector plate 1, light is mixed above the joint of the PCBs 7, so that light above the joint of the PCBs 7 is sufficiently mixed, and therefore, no gap dark band occurs at the joint of the PCBs 7 corresponding to the diffuser plate 5, and the overall display effect can be increased.
The assembly method of the Mini LED module 100 provided by the present application is: the PCB board 7 provided with the LEDs is bonded on the inner side of the back plate 6 through a double-sided adhesive tape, the reflector plate 1 is bonded on the front side of the PCB board 7, and the light scattering part 3 is bonded on the reflector plate 1 through a multi-point dispensing mode, so that the light transmission film 31 covers the reflector plate 1, and meanwhile, the reflector lenses 32 are in one-to-one correspondence with the light emitting diodes 2, and the reflector lenses 32 cover the light emitting diodes 2.
In summary, the present invention provides a Mini LED module 100, where the Mini LED module 100 includes a reflector 1, a light emitting diode 2, and a light scattering portion 3, the light scattering portion 3 includes a light transmissive film 31 and a reflective lens 32, the reflective lens 32 covers the light emitting diode 2, light emitted by the light emitting diode 2 enters the reflective lens 32, and an upper surface of the reflective lens 32 is concave, so that most of the light reaching the upper surface of the reflective lens 32 is reflected to propagate downward and refracted along a peripheral surface of the reflective lens 32, and part of the light is directly refracted from the peripheral surface of the reflective lens 32. The outgoing light is refracted from the peripheral surface of the reflection lens 32 in an obliquely downward state, reaches the surface of the reflection sheet 1 along the light transmission hole 311, and is reflected by the reflection sheet 1, so that the light is mixed, and relatively uniform surface light energy is obtained.
The present invention further provides a display device (not shown), in this embodiment, the display device is a television, and the television includes the Mini LED module 100 for providing a display function. The display device is not limited to a television, but may be an outdoor display screen, a convention screen, or the like, for example.
In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the invention and to simplify the description, and are not intended to indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and are not to be considered limiting of the invention.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are 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 the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.
In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
In the present invention, unless otherwise expressly stated or limited, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through an intermediate. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.
It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like as used herein are for illustrative purposes only and do not denote a unique embodiment.
Naturally, the above-mentioned embodiments of the present invention are described in detail, but it should not be understood that the scope of the present invention is limited thereby, and other various embodiments of the present invention can be obtained by those skilled in the art without any inventive work based on the present embodiments, and the scope of the present invention is defined by the appended claims.
Claims (10)
1. A Mini LED module, comprising:
a reflective sheet;
the light emitting diode is embedded on the reflecting sheet;
a light scattering part disposed on the reflective sheet; the light diffusion part comprises a light transmission film and a reflecting lens; the reflecting lens is used for covering the light emitting diodes, and the reflecting lens and the light emitting diodes are arranged in a one-to-one correspondence manner; the upper surface of the reflecting lens is concave; the reflecting lens upwards exceeds the light-transmitting film, and the circumferential direction of the reflecting lens is a smooth surface; the light-transmitting film is used for being laid on the surface of the reflector plate and is connected with the reflector lenses, and a plurality of light-transmitting holes penetrating through the light-transmitting film are formed in the light-transmitting film.
2. The Mini LED module of claim 1, wherein the upper surface of the reflective lens is frosted.
3. The Mini LED module according to claim 1, wherein the reflective lens is truncated cone shaped with a peripheral surface that gradually tapers toward the axis in the direction of increasing height.
4. The Mini LED module set according to claim 1, wherein the bottom surface of the reflective lens is provided with mounting holes, and the LEDs are disposed in the corresponding mounting holes; the mounting hole extends upwards, and the height of the mounting hole is smaller than that of the reflecting lens.
5. The Mini LED module of claim 1, wherein the density of the light holes between any two adjacent reflective lenses gradually increases from the middle to the two ends.
6. The Mini LED module of claim 1, wherein the reflective lens and the light transmissive film are made of polyester resin.
7. The Mini LED module of claim 6, wherein the reflective lens is integrally formed with the optically transmissive film.
8. The Mini LED module of claim 1, wherein the Mini LED module further comprises a PCB board and a back plate;
the PCB is provided with a plurality of blocks, the PCBs are spliced with one another and arranged below the reflecting sheet, the light-emitting diodes are arranged on the corresponding PCBs, and the top ends of the light-emitting diodes outwards exceed the reflecting sheet.
9. The Mini LED module set according to claim 8, wherein the top end of the joint of any two adjacent PCB boards is covered by the light scattering part.
10. A display device comprising the Mini LED module of any one of claims 1 to 9.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210146832.9A CN114415426B (en) | 2022-02-17 | 2022-02-17 | Mini LED module and display device thereof |
| PCT/CN2022/111780 WO2023155392A1 (en) | 2022-02-17 | 2022-08-11 | Mini led module and display device thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210146832.9A CN114415426B (en) | 2022-02-17 | 2022-02-17 | Mini LED module and display device thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114415426A true CN114415426A (en) | 2022-04-29 |
| CN114415426B CN114415426B (en) | 2022-11-29 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210146832.9A Active CN114415426B (en) | 2022-02-17 | 2022-02-17 | Mini LED module and display device thereof |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN114415426B (en) |
| WO (1) | WO2023155392A1 (en) |
Cited By (1)
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Also Published As
| Publication number | Publication date |
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| CN114415426B (en) | 2022-11-29 |
| WO2023155392A1 (en) | 2023-08-24 |
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