CN111258117A - Mini LED-based backlight source and display device - Google Patents
Mini LED-based backlight source and display device Download PDFInfo
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- CN111258117A CN111258117A CN202010168163.6A CN202010168163A CN111258117A CN 111258117 A CN111258117 A CN 111258117A CN 202010168163 A CN202010168163 A CN 202010168163A CN 111258117 A CN111258117 A CN 111258117A
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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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- 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
- 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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- Nonlinear Science (AREA)
- Mathematical Physics (AREA)
- Chemical & Material Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Planar Illumination Modules (AREA)
- Liquid Crystal (AREA)
Abstract
The invention discloses a mini LED-based backlight source, which relates to the technical field of backlight sources and comprises a body, wherein the body comprises a substrate and a mini LED, the mini LED is arranged on the substrate, and the body also comprises an astigmatism glue layer, a diffusion glue layer, an X-direction light correction glue layer and a Y-direction light correction glue layer; the astigmatism glue film sets up on the base plate and covers mini LED, and Y is to the light correction glue film loop through X to the light correction glue film and the diffusion glue film covers to the play plain noodles on the astigmatism glue film, and X is to the light correction glue film and Y is to the play plain noodles on light correction glue film be provided with a plurality of evenly distributed's X respectively to bead and Y to the bead, and a plurality of X distribute along X direction and Y direction respectively to bead and Y to the bead. The embodiment of the invention also discloses a display device comprising the mini LED-based backlight light source. The embodiment of the invention adopts a multilayer coating mode to replace a plurality of components in the traditional backlight structure, thereby realizing ultrathin and narrow frames.
Description
Technical Field
The embodiment of the invention relates to the technical field of backlight light sources, in particular to a mini LED-based backlight light source and a display device.
Background
With the development of science and technology, the market has higher and higher requirements on backlight light source products, and ultrathin, high-brightness and narrow frames are the mainstream at present. Various new ways are developed for designing ultrathin narrow frames of backlight light sources, the ultrathin frames are all based on the materials used for thinning the existing framework, and the narrow frames are all realized on the basis of continuously reducing the adhesive width of an adhesive tape.
The conventional backlight source structure mainly includes a side-in type and a direct type, wherein the side-in type is shown in fig. 1 and includes a light shielding adhesive 11, an upper prism 12, a lower prism 13, a diffusion plate 14, a light guide plate 15, a reflective sheet 16, a frame 17 and a light bar 18. Referring to fig. 2, the direct type backlight module includes a light shielding adhesive 21, an upper prism 22, a lower prism 23, a diffuser plate 24, a lamp panel 25 and a frame 26. As can be seen from fig. 1 and 2, the conventional backlight source is assembled by the carrying frame, the optical film, the light source and the adhesive tape, and the thickness and the width of the frame of the product are affected by the material of the component and the fit clearance; moreover, the narrow frame and the ultra-thin frame adopt ultra-thin materials, the ultra-narrow gap and the adhesive area of the adhesive tape are reduced, so that the product is unstable.
Disclosure of Invention
In order to overcome the defects of the prior art, the invention aims to provide a mini LED-based backlight source and a display device, which adopt a multilayer coating mode to replace the components such as a frame, a diffusion plate, an upper prism and a lower prism in the traditional backlight structure and can be designed into a ultrathin and narrow-frame backlight source.
In a first aspect, an embodiment of the present invention provides a mini LED-based backlight source, which includes a body, where the body includes a substrate and a mini LED, the mini LED is mounted on the substrate, and the body further includes an astigmatism glue layer, a diffusion glue layer, an X-direction light correction glue layer, and a Y-direction light correction glue layer; the astigmatism glue film sets up on the base plate and covers mini LED, Y is to light correction glue film loop through X to light correction glue film and diffusion glue film cover extremely on the play plain noodles of astigmatism glue film, just diffusion glue film, X are all located the astigmatism glue film to light correction glue film and Y and keep away from one side of base plate to the width direction of base plate is the X direction, uses the length direction of base plate to be the Y direction, X is provided with a plurality of evenly distributed's X respectively to bead and Y to bead to the play plain noodles of light correction glue film and Y to light correction glue film, and is a plurality of X distributes along X direction and Y direction respectively to bead and Y to bead.
In a preferred embodiment, the light diffusion glue layer comprises a functional surface and a connecting part; adjacent functional surfaces are connected through a connecting part to form an integrally formed structure, the functional surfaces cover the mini LED, and the functional surfaces comprise one or more of a first functional surface, a second functional surface and a third functional surface;
the method comprises the steps of taking a light ray emitted by a target mini LED and perpendicular to a substrate as a reference light ray, recording an included angle between the light ray emitted by the target mini LED and incident on a first functional surface and the reference light ray as a first included angle, wherein the first included angle is more than or equal to 0 and less than α, recording an included angle between the light ray emitted by the target mini LED and incident on a second functional surface and the reference light ray as a second included angle, the second included angle is more than or equal to α and less than or equal to α + β, recording an included angle between the light ray emitted by the target mini LED and incident on a third functional surface and the reference light ray as a third included angle, the third included angle is more than α + β and less than or equal to α + β + gamma, wherein α is more than or equal to 90 degrees, β is more than or equal to 0 degrees and less than 90 degrees, and gamma is more than or equal to 0 degrees.
In a preferred embodiment, the light rays of the mini LED incident on the corresponding first functional surface are scattered; the light rays incident on the corresponding second functional surface of the mini LED are totally reflected; and the light rays of the mini LED incident on the corresponding third functional surface are scattered.
In a preferred embodiment, the side of the body is provided with a light-shielding glue layer.
In a preferred embodiment, the light-shielding glue layer is white.
In a preferred embodiment, the refractive index of the X-direction optical correction glue layer material is greater than the refractive index of the Y-direction optical correction glue layer material.
In a preferred embodiment, the Y-direction optical correction adhesive layer is formed by curing alone, the Y-direction optical correction adhesive layer is arranged on the light-emitting surface of the X-direction optical correction adhesive layer in a hot pressing or non-bonding manner, and then the outer edge of the joint of the Y-direction optical correction adhesive layer and the X-direction optical correction adhesive layer is glued and fixed.
In a preferred embodiment, when the Y-direction optical correction adhesive layer is disposed on the light-emitting surface of the X-direction optical correction adhesive layer by means of hot pressing:
the X-direction rib comprises a first X-direction rib and a second X-direction rib, the first X-direction rib and the second X-direction rib are distributed in a staggered mode, and the height of the first X-direction rib is larger than that of the second X-direction rib.
In a preferred embodiment, the two side edges of the light-emitting surface of the X-direction optical correction adhesive layer and the light-emitting surface of the Y-direction optical correction adhesive layer are respectively provided with a first adhesive tape and a second adhesive tape; the first adhesive tapes are distributed along the X direction, the first adhesive tapes and the X-direction light correction adhesive layer are integrally formed, and two ends of the X-direction convex edge extend to the two first adhesive tapes; the second adhesive tape is distributed along the Y direction, the second adhesive tape and the Y-direction optical correction adhesive layer are integrally formed, and two ends of the Y-direction convex edge extend to the two second adhesive tapes.
In a second aspect, the present invention provides a display device, which includes the mini LED-based backlight light source according to the first aspect of the present invention.
Compared with the prior art, the embodiment of the invention adopts a multilayer coating mode to replace the frame, the diffusion, the upper prism, the lower prism and other members in the traditional backlight structure. The advantages are that: 1. the ultra-narrow frame can be made without a back plate and a frame for bearing the components; 2. the design of an optical film material is cancelled, and the ultrathin design can be realized; 3. the design of optical film materials is cancelled, and the problems of uneven display caused by the unevenness and the warping of the film materials, bright edges caused by improper assembly of the film materials and the like are avoided. 4. Compared with the traditional backlight without assembly gap collocation, the film material has the advantages that the problems of a series of folds and film drums generated in the reliability process due to insufficient gaps are solved, and the reliability performance is more stable.
Drawings
FIG. 1 is a schematic structural diagram of a conventional lateral backlight source;
FIG. 2 is a schematic structural diagram of a conventional direct-type backlight source;
fig. 3 is a schematic structural diagram of a mini LED-based backlight source according to the first embodiment (without a light-shielding adhesive layer);
FIG. 4 is a schematic view of the structure of a mini LED-based backlight source according to the first embodiment (including a light-shielding adhesive layer)
FIG. 5 is a view showing the structure of the light diffusion adhesive layer;
FIG. 6 is a light path diagram on the functional surface;
FIG. 7 is a light path diagram of the Y-direction optical correction adhesive layer;
fig. 8 is a schematic structural view of the X-ray correction glue layer.
In the figure: 11. shading glue; 12. an upper prism; 13. a lower prism; 14. a diffusion plate; 15. a light guide plate; 16. a reflective sheet; 17. a frame; 18. a light bar; 21. shading glue; 22. an upper prism; 23. a lower prism; 24. a diffusion plate; 25. a lamp panel; 26 a frame; 1. a substrate; 2. a mini LED; 3. an astigmatism glue layer; 31. a functional surface; 311. a first functional surface; 312. a second functional surface; 313. a third functional surface; 32. a connecting portion; 4. a diffusion glue layer; 5. an X-direction light correction adhesive layer; 51. a first X-direction rib; 52. a second X-direction rib; 6. a Y-direction light correction glue layer; 61. a Y-direction rib; 7. and a shading glue layer.
Detailed description of the preferred embodiments
The embodiments of the present invention are further described below with reference to the drawings and the specific embodiments, and it should be noted that, in the premise of no conflict, any combination between the embodiments or technical features described below may form a new embodiment. Except as specifically noted, the materials and equipment used in this example are commercially available.
The first embodiment is as follows:
the embodiment of the invention discloses a novel scattering type backlight source based on a mini LED, and the novel scattering type backlight source is shown in figure 3, and comprises a body, wherein the body comprises a substrate 1 and a mini LED 2; the mini LED2 is installed on the substrate 1, a power circuit is arranged on the substrate 1, the mini LED2 is located on the power circuit, an external power supply is connected with the mini LED2 through the power circuit, the power supply is provided for the mini LED2, the mini LED2 emits light, and meanwhile the substrate 1 is also used as a whole backlight light source to be designed and loaded.
In order to realize an ultra-thin and narrow-frame display device, in a preferred embodiment of the invention, please refer to fig. 3 and 7, the main body further includes a light diffusion adhesive layer 3, a diffusion adhesive layer 4, an X-direction light correction adhesive layer 5, and a Y-direction light correction adhesive layer 6; the astigmatism glue film sets up and covers on base plate 1 mini LED2, Y loops through X to light correction glue film 5 and diffusion glue film 4 cover extremely on the play plain noodles of astigmatism glue film 3 to light correction glue film 6, just diffusion glue film 4, X all are located astigmatism glue film 3 to light correction glue film 5 and Y and keep away from one side of base plate 1 to the width direction of base plate 1 is the X direction, and be the Y direction to the length direction of base plate, X is provided with a plurality of evenly distributed's X respectively to bead and Y to bead to the play plain noodles of light correction glue film and Y to light correction glue film, and is a plurality of X distributes along X direction and Y direction respectively to bead and Y to bead 61.
Due to the limitation of the light emitting angle of the mini LED2, the main energy of light is concentrated at a certain angle in the vertical direction, so that the lamp space is dark, and the light diffusion glue layer 3 mainly enlarges the light emitting angle of the mini LED 2. The mini LED2 is subjected to diffuse reflection when meeting the diffusion particles of the diffusion adhesive layer 4, so that the light of the picture is more uniform; the X-direction optical correction adhesive layer 5 and the Y-direction optical correction adhesive layer 6 correct the light in the random direction to the Z direction (i.e., the direction of the light emitted from the mini LED2 perpendicular to the substrate).
The embodiment of the invention adopts a multi-layer coating mode to replace the frame, the diffusion, the upper prism, the lower prism and other members in the traditional backlight structure. The advantages are that: 1. the ultra-narrow frame can be made without a back plate and a frame for bearing the components; 2. the design of an optical film material is cancelled, and the ultrathin design can be realized; 3. the design of optical film materials is cancelled, and the problems of uneven display caused by the unevenness and the warping of the film materials, bright edges caused by improper assembly of the film materials and the like are avoided. 4. Compared with the traditional backlight without assembly gap collocation, the film material has the advantages that the problems of a series of folds and film drums generated in the reliability process due to insufficient gaps are solved, and the reliability performance is more stable.
In the embodiment of the invention, the substrate is used as a carrier, different microstructure glue layers are sequentially designed to adjust the picture taste, and meanwhile, in order to prevent the light leakage phenomenon caused by the emission of the mini LED2 from the side edge of the body, please refer to fig. 4, a light-shielding glue layer 7 is arranged on the outer side of the body, the light-shielding glue layer 7 can be arranged on the body in ink-jet, adhesive sticking, glue injecting, coating and other modes, the color of the light-shielding glue layer 7 is preferably white, and the light loss can be avoided.
The light scattering glue layer 3 and the mini LED2 are positioned on the same side of the substrate 1, and the light scattering glue layer 3 covers the mini LED 2; by performing special microstructure processing on the light scattering adhesive layer 3, the following effects are achieved: 1. the thickness of the light diffusion glue layer 3 is higher than the total height of the mini LED2, so that the mini LED is protected from being damaged by external impact, and the overall strength of the lamp panel is improved; 2. according to the luminous intensity curve of the mini LED2, the microstructure is designed, so that light rays at a certain part of angles of the mini LED2 are totally reflected to supplement an area with weaker intensity, the whole light intensity arrangement is changed, and a relatively uniform surface light source is realized. The uniform surface light source can reduce the number of mini LEDs, reduce cost, shorten light mixing distance and realize the lightness and thinness of the backlight light source.
Based on the structure of the light diffusion adhesive layer 3, the thickness of the diffusion adhesive layer 4 can be greatly reduced. Referring to fig. 5 and 6, the light diffusion adhesive layer 3 includes a functional surface 31 and a connecting portion 32, wherein the functional surface 31 covers the mini LED2, each mini LED2 corresponds to one functional surface 31, the functional surface 31 is the microstructure of the corresponding mini LED2, the adjacent functional surfaces 31 are connected by the connecting portion 32, the height of the connecting portion is not limited, and as a preferred embodiment of the present invention, the connecting portion 32 can be as high as the mini LED 2.
The functional surface 31 comprises one or more of a first functional surface 311, a second functional surface 312 and a third functional surface 313, and as the main light energy of the mini LED2 is concentrated in the positive direction of the mini LED2, a concave functional surface is arranged on the functional surface right above the mini LED2, so that part of light in the main energy area of the mini LED is totally reflected to compensate the area with weak light intensity. The concave functional surfaces here comprise a first functional surface 311 and a second functional surface 312.
Taking an arbitrary mini LED (called a target mini LED, and a corresponding functional surface called a target functional surface) as an example, defining a light ray emitted by the target mini LED, which is perpendicular to a substrate and away from the substrate, as a reference light ray, and defining a point on the functional surface on which the reference light ray is incident as a central point O, there are the following cases:
1. the included angle between the light ray emitted by the target mini LED and incident on the first functional surface of the target functional surface and the reference light ray is recorded as a first included angle, the first included angle is larger than or equal to 0 and smaller than α (if α is equal to 0 degrees, the first functional surface does not exist), the light ray incident on the first functional surface of the target mini LED is scattered, the scattering is that part of the light ray penetrates through the first functional surface to be refracted, and the part of the light ray is reflected through the first functional surface and is formed by multiple reflection and refraction.
2. And the included angle between the light ray emitted by the target mini LED and incident on the second functional surface of the target functional surface and the reference light ray is recorded as a second included angle, the second included angle is greater than or equal to α and less than or equal to α + β, and the light ray emitted by the target mini LED and incident on the second functional surface of the target functional surface is totally reflected, namely the incident angles of the light ray emitted by the target mini LED and incident on the second functional surface of the target functional surface are all total reflection angles theta.
3. And recording an included angle between a light ray emitted by the target mini LED and incident to a third functional surface of the target functional surface and the reference light ray as a third included angle, wherein the third included angle is larger than α + β and smaller than or equal to α + β + gamma, and the light ray emitted by the target mini LED and incident to the third functional surface of the target functional surface is scattered.
Here, 0 ° ≦ α ≦ 90 °, 0 ° ≦ β ≦ 90 °, 0 ° ≦ γ ≦ 90 °, α + β + γ ≦ 90 ° when the connecting portion is as high as the mini LED, of course, α + β + γ ≦ 90 ° if the connecting portion is higher than the mini LED, and α + β + γ ≦ 90 ° if the connecting portion is lower than the mini LED and the third functional surface lower than the mini LED portion does not function.
Here, it is only exemplified that α + β + γ is 90 °, when α is 0 °, it means that there is no first functional surface, the concave functional surface is a straight line with a certain slope, the slope is related to the refractive index of the used material on both sides, total reflection occurs when the light emitted from the mini LED has an incident angle of 90 °, when α is 90 °, it means no total reflection occurs, when α is 90 ° and γ is 90 °, the magnitude of α, β, γ is designed according to the light intensity distribution of the mini LED, the distance between adjacent mini LEDs, the refractive index of the used light scattering glue layer material, and the like, for example, the light intensity distribution of the mini LED is concentrated in the 0 ° direction, the size of α is smaller, and the size of β is larger.
Taking the case of the simultaneous presence of a first functional surface, a second functional surface and a third functional surface, namely 0 ° < α < 90 °, 0 ° < β < 90 °, 0 ° < γ < 90 °, as shown in fig. 6, there are a plurality of points B on the functional surface, all light rays incident into the region enclosed by the points B are all included at an angle smaller than α ° with respect to the reference light rays, where the points B form a closed first annular structure, the region inside the first annular structure is the first functional surface, all light rays incident into the first functional surface are scattered at any point a, there are a plurality of points C on the functional surface, all light rays incident into the region enclosed by the points B and C (including the points B and C) of the mini LED are all θ, where the points C form a closed second annular structure, the region between the first annular structure and the second annular structure is the second functional surface, where the light rays incident into the second functional surface are all incident angles, where the functional surface has a plurality of points E, and the points E are all included at a central point B, and the point C is a central point D, where the third annular structure is a central point C + a point of the second annular structure, where the light ray is a central point D is a central point of the functional surface, where the third functional surface is a substantially equal to total reflection point B + f, where the functional surface is formed, where the third functional surface, where the functional surface is a central point B + f, where the functional surface is a central point of the third functional surface.
The astigmatism glue layer can adopt UV type or non-UV type material, designs functional surface (micro-structure) on astigmatism glue layer and is used for changing the propagation direction of light. The realization mode of the light scattering glue layer can be completed by flat pressing, rolling, extruding, printing and the like, wherein the general flow of the flat pressing mode is as follows: arranging the astigmatic adhesive layer on the substrate, preliminarily leveling the astigmatic adhesive layer, flatly pressing, solidifying and cutting. When flat pressing, the pressing plate is adopted to press the glue layer, a groove matched with the functional surface is formed in the pressing surface of the pressing plate, and the matching comprises the shape and the position. The rolling process is roughly characterized by arranging the astigmatic adhesive layer, preliminarily flattening the astigmatic adhesive layer, precuring, rolling, solidifying and cutting.
In the first embodiment of the invention, the design of the values α, β, gamma α, β and gamma is related to the light intensity distribution of the mini LED, the distance between adjacent mini LEDs, the refractive index of the used light scattering glue layer material and other factors according to different mini LED light intensity curves, the concave functional surfaces can be formed by connecting a plurality of sections of arcs and can also be connected in a straight line mode, and the specific structure of the concave functional surfaces is adjusted according to the light intensity distribution of the mini LED, the distance between adjacent mini LEDs, the refractive index of the used light scattering glue layer material and other factors.
Similar to the way that the light diffusion adhesive layer 3 is arranged on the substrate, the diffusion adhesive layer 4 is arranged on the light-emitting surface of the light diffusion adhesive layer 3 in a coating, molding and curing way; the X-direction light correction glue layer 5 is arranged on the light-emitting surface of the diffusion glue layer 4 in a coating, molding and curing mode; the Y-direction light correction adhesive layer 6 is arranged on the light emergent surface of the X-direction light correction adhesive layer 5 in a coating, molding and curing mode, then the body is formed by corresponding cutting, and finally the shading adhesive layer 7 is arranged on the outer side of the body in ink-jet, adhesive-sticking, glue-injecting, coating and other modes.
In the above-described manufacturing process, X, Y is in contact with the optical correction glue layer, and the refractive index of the material of the Y-direction optical correction glue layer 6 needs to be smaller than the refractive index of the X-direction optical correction glue layer 5, thereby ensuring the X-direction correction effect. When the shading adhesive layer 7 is arranged in a mode of ink jetting, coating, glue injection and the like, foreign matters enter the display device through the ribbed concave surface, a non-ribbed area with a certain width can be designed and reserved on the light-emitting surface of the light correction adhesive layer at X, Y, and non-ribbed areas with a certain width on the X-direction light correction adhesive layer 5 and the Y-direction light correction adhesive layer 6 are respectively called as a first adhesive tape (not shown) and a second adhesive tape 62. The number of the first adhesive tape and the second adhesive tape 62 is two, and the first adhesive tape and the second adhesive tape are respectively located on two side edges of the light-emitting surface of the X-direction optical correction adhesive layer and the light-emitting surface of the Y-direction optical correction adhesive layer. The first adhesive tapes are distributed along the X direction, the first adhesive tapes and the X-direction light correction adhesive layer are integrally formed, and two ends of the X-direction convex edge extend to the two first adhesive tapes; the second adhesive tape is distributed along the Y direction, the second adhesive tape and the Y-direction optical correction adhesive layer are integrally formed, and two ends of the Y-direction convex edge extend to the two second adhesive tapes. The height of the first rubber strip is preferably not lower than that of any X-direction rib; the height of the second rubber strip is preferably not lower than that of the Y-direction rib.
In the case of the above manufacturing process, since the light-emitting surface of the X-direction optical correction adhesive layer is connected to the Y-direction optical correction adhesive layer, so that the light is refracted only once in the Y-direction optical correction adhesive layer, in order to make the light be refracted twice in the Y-direction optical correction adhesive layer as shown in fig. 7 to improve the optical correction efficiency, in the preferred embodiment of the present invention, the Y-direction optical correction adhesive layer 6 is manufactured separately, and is connected to the X-direction optical correction adhesive layer 5 by hot pressing or non-bonding after being cured and molded, and then the Y-direction optical correction adhesive layer is fixed by side gluing, in this way, the refractive index of the material of the X, Y-direction optical correction adhesive layer is not limited.
In the preferred embodiment of the present invention, please refer to fig. 8, the X-direction ridges are designed to be high-low ridges to improve the light efficiency. Specifically, the method comprises the following steps: the X-direction ribs comprise a first X-direction rib 51 and a second X-direction rib 52, the first X-direction rib 51 and the second X-direction rib 52 are distributed in a staggered mode, the height of the first X-direction rib is larger than that of the second X-direction rib, and the height of the first X-direction rib is the vertical distance between the top point of the first X-direction rib and the lower end face (the binding face with the diffusion adhesive layer) of the X-direction optical correction adhesive layer; the height of the second X-direction convex edge is the vertical distance between the top point of the second X-direction convex edge and the lower end face of the X-direction light correction adhesive layer.
Example two
The second embodiment discloses a display device, which comprises the backlight module. The display device here may be: the display device comprises any product or component with a display function, such as a liquid crystal display panel, electronic paper, a mobile phone, a tablet personal computer, a television, a display, a notebook computer, a digital photo frame, a navigator and the like.
The above embodiments are only preferred embodiments of the present invention, and the scope of the embodiments of the present invention should not be limited thereby, and any insubstantial changes and substitutions made by those skilled in the art based on the embodiments of the present invention are within the scope of the claims of the embodiments of the present invention.
Claims (10)
1. A backlight source based on a mini LED comprises a body, wherein the body comprises a substrate and the mini LED, and the mini LED is arranged on the substrate; the astigmatism glue film sets up on the base plate and covers mini LED, Y is to light correction glue film loop through X to light correction glue film and diffusion glue film cover extremely on the play plain noodles of astigmatism glue film, just diffusion glue film, X are all located the astigmatism glue film to light correction glue film and Y and keep away from one side of base plate to the width direction of base plate is the X direction, uses the length direction of base plate to be the Y direction, X is provided with a plurality of evenly distributed's X respectively to bead and Y to bead to the play plain noodles of light correction glue film and Y to light correction glue film, and is a plurality of X distributes along X direction and Y direction respectively to bead and Y to bead.
2. The mini LED-based backlight source of claim 1, wherein the light-diffusing glue layer includes a functional face and a connecting portion; adjacent functional surfaces are connected through a connecting part to form an integrally formed structure, the functional surfaces cover the mini LED, and the functional surfaces comprise one or more of a first functional surface, a second functional surface and a third functional surface;
the method comprises the steps of taking a light ray emitted by a target mini LED and perpendicular to a substrate as a reference light ray, recording an included angle between the light ray emitted by the target mini LED and incident on a first functional surface and the reference light ray as a first included angle, wherein the first included angle is more than or equal to 0 and less than α, recording an included angle between the light ray emitted by the target mini LED and incident on a second functional surface and the reference light ray as a second included angle, the second included angle is more than or equal to α and less than or equal to α + β, recording an included angle between the light ray emitted by the target mini LED and incident on a third functional surface and the reference light ray as a third included angle, the third included angle is more than α + β and less than or equal to α + β + gamma, wherein α is more than or equal to 90 degrees, β is more than or equal to 0 degrees and less than 90 degrees, and gamma is more than or equal to 0 degrees.
3. The mini LED-based backlight source of claim 2, wherein light rays incident on the corresponding first functional face of the mini LED are scattered; the light rays incident on the corresponding second functional surface of the mini LED are totally reflected; and the light rays of the mini LED, which are incident on the corresponding third functional surface, are scattered.
4. The mini LED-based backlight source of claim 1, wherein the side of the body is provided with a light blocking glue layer.
5. The mini LED based backlight source of claim 4, wherein the light blocking glue layer is white.
6. The mini LED-based backlight source of any of claims 1-5, wherein the refractive index of the X-direction light-correcting glue layer material is greater than the refractive index of the Y-direction light-correcting glue layer material.
7. The mini LED-based backlight source of any one of claims 1 to 5, wherein the Y-direction optical correction adhesive layer is formed by curing alone, the Y-direction optical correction adhesive layer is arranged on the light-emitting surface of the X-direction optical correction adhesive layer by hot pressing or non-bonding, and then the outer edge of the joint of the Y-direction optical correction adhesive layer and the X-direction optical correction adhesive layer is glued and fixed.
8. The mini LED-based backlight source of claim 7, wherein when the Y-direction optical correction adhesive layer is disposed on the light-emitting surface of the X-direction optical correction adhesive layer by means of hot pressing:
the X-direction rib comprises a first X-direction rib and a second X-direction rib, the first X-direction rib and the second X-direction rib are distributed in a staggered mode, and the height of the first X-direction rib is larger than that of the second X-direction rib.
9. The mini LED-based backlight source of any of claims 1-5, wherein the first adhesive tape and the second adhesive tape are respectively disposed on the two side edges of the light-emitting surface of the X-direction optical correction adhesive layer and the light-emitting surface of the Y-direction optical correction adhesive layer; the first adhesive tapes are distributed along the X direction, the first adhesive tapes and the X-direction light correction adhesive layer are integrally formed, and two ends of the X-direction convex edge extend to the two first adhesive tapes; the second adhesive tape is distributed along the Y direction, the second adhesive tape and the Y-direction optical correction adhesive layer are integrally formed, and two ends of the Y-direction convex edge extend to the two second adhesive tapes.
10. A display device comprising a mini LED based backlight source as claimed in any one of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010168163.6A CN111258117A (en) | 2020-03-11 | 2020-03-11 | Mini LED-based backlight source and display device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010168163.6A CN111258117A (en) | 2020-03-11 | 2020-03-11 | Mini LED-based backlight source and display device |
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| CN111258117A true CN111258117A (en) | 2020-06-09 |
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| CN202010168163.6A Pending CN111258117A (en) | 2020-03-11 | 2020-03-11 | Mini LED-based backlight source and display device |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112413431A (en) * | 2020-11-30 | 2021-02-26 | 惠州市盈帆实业有限公司 | Mini LED lamp plate |
| US20220206206A1 (en) * | 2020-12-29 | 2022-06-30 | Coretronic Corporation | Backlight module and display apparatus |
| TWI822078B (en) * | 2022-06-02 | 2023-11-11 | 智崴資訊科技股份有限公司 | Led display device |
-
2020
- 2020-03-11 CN CN202010168163.6A patent/CN111258117A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112413431A (en) * | 2020-11-30 | 2021-02-26 | 惠州市盈帆实业有限公司 | Mini LED lamp plate |
| US20220206206A1 (en) * | 2020-12-29 | 2022-06-30 | Coretronic Corporation | Backlight module and display apparatus |
| TWI822078B (en) * | 2022-06-02 | 2023-11-11 | 智崴資訊科技股份有限公司 | Led display device |
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