CN113093433A - Light source assembly, preparation method thereof, backlight module and display device - Google Patents
Light source assembly, preparation method thereof, backlight module and display device Download PDFInfo
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Classifications
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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
- G02F1/133504—Diffusing, scattering, diffracting elements
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
- G02F1/1336—Illuminating devices
- G02F1/133602—Direct backlight
- G02F1/133603—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
- G02F1/133605—Direct backlight including specially adapted reflectors
Abstract
The invention relates to a light source component and a preparation method thereof.A driving substrate is provided with a first surface; the plurality of light-emitting elements are arranged on the first surface and electrically connected to the driving substrate; the reflecting layer is coupled to the area, where the light emitting elements are not arranged, of the first surface, the reflecting layer comprises a plurality of light emitting reflecting parts, and a plurality of light emitting reflecting parts are correspondingly arranged around each light emitting element; the light-emitting reflecting parts are configured to be arranged outwards and convexly relative to the first surface so as to form a plurality of cavities which are spaced from each other with the first surface. The reflecting layer is provided with the light-emitting reflecting part protruding outwards, so that the reflecting layer is provided with the rugged rough surface, light emitted by the light-emitting element is changed into diffuse reflection after being irradiated onto the reflecting layer, and the utilization rate of a light source is improved. A backlight module and a display device are also provided.
Description
Technical Field
The invention relates to the technical field of display, in particular to a light source assembly, a preparation method of the light source assembly, a backlight module and a display device.
Background
Liquid Crystal Display (LCD) devices have advantages of small size, low power consumption, no radiation, and the like, and are widely used in various electronic devices. The backlight module is divided into a direct type backlight module and a side type backlight module, and compared with the side type backlight module, the direct type backlight module does not need to be provided with a light guide plate and has higher light conductivity.
However, the light source module in the direct-type backlight module in the existing design still has the problem of low light source utilization rate.
Disclosure of Invention
Therefore, it is necessary to provide a light source assembly, a method for manufacturing the light source assembly, a backlight module and a display device, so as to solve the problem of low light source utilization rate of the light source assembly in the direct-type backlight module.
According to an aspect of the present application, there is provided a light source assembly comprising:
a driving substrate having a first surface;
a plurality of light emitting elements disposed on the first surface and electrically connected to the driving substrate;
the reflecting layer is coupled to an area, which is not provided with the light emitting elements, of the first surface, and comprises a plurality of light emitting reflecting parts, and a plurality of light emitting reflecting parts are correspondingly arranged around each light emitting element;
the light-emitting reflecting parts are configured to be arranged outwards and convexly relative to the first surface so as to form a plurality of cavities which are spaced from each other with the first surface.
According to another aspect of the present application, there is provided a light source assembly comprising:
a driving substrate having a first surface;
a plurality of light emitting elements disposed on the first surface and electrically connected to the driving substrate;
a reflective layer located at a region of the first surface where the light emitting element is not disposed, the reflective layer having an approaching surface facing the first surface and a reflective surface facing away from the first surface; and
the light-emitting reflecting parts are arranged on the reflecting surface and are outwards and convexly arranged relative to the first surface, and a plurality of light-emitting reflecting parts are correspondingly arranged around each light-emitting element;
wherein the approach surface has a first region joined to the first surface and a plurality of second regions forming a plurality of cavities spaced from each other with the first surface therebetween;
the projection of each light-emitting reflection part on the first surface and the projection of the corresponding second area on the first surface are coincident with each other.
In one embodiment, the cavity is a vacuum cavity or filled with air.
In one embodiment, the light-emitting reflecting parts are arranged in a convex manner along the normal direction of the first surface and are arranged along the direction orthogonal to the normal direction of the first surface;
the light-emitting reflecting part is provided with at least part of contour boundary which is curved or inclined relative to the normal direction of the first surface along any section parallel to the normal direction of the first surface.
In one embodiment, the light-emitting reflecting portions corresponding to the periphery of each of the light-emitting elements are arranged in a plurality of annular shapes at intervals.
In one embodiment, each of the light-emitting reflecting portions has the same structure.
In one embodiment, in the plurality of light exit reflection portions corresponding to the periphery of each of the light emitting elements, the projection area of the light exit reflection portion on the first surface, which is farther from the light emitting element, is larger.
In one embodiment, among the plurality of rings, the number of the light exit reflecting portions arranged on the ring farther from the light emitting element is larger.
In one embodiment, the light emitting reflection portion satisfies the following condition:
the height H of the light-emitting reflection part relative to the first surface is more than or equal to 0.2 mm; the minimum width A of the projection of the light-emitting reflection part on the first surface is more than or equal to 0.4 mm.
In one embodiment, the light exit reflectors satisfy the following condition: the pitch P between two adjacent light-emitting reflecting parts meets the following condition: p is more than or equal to 1 mm.
In an embodiment, a projection boundary of any one of the light exit reflectors on the innermost one of the rings on the first surface is a distance D from a projection boundary of the light emitting element on the first surface, which satisfies the following condition: d is more than or equal to 0.1 mm.
In one embodiment, the reflective layer comprises a first optical base layer, a second optical base layer, and a foam layer between the first optical base layer and the second optical base layer;
the first optical base material faces the first surface of the drive substrate.
According to yet another aspect of the present application, there is provided a method of producing a light source assembly, comprising the steps of:
providing a driving substrate and a reflecting layer; the reflecting layer is formed with a plurality of light-emitting reflecting parts through vacuum forming or compression molding;
arranging a plurality of light-emitting elements on the first surface of the driving substrate and electrically connecting the light-emitting elements with the driving substrate;
coupling the reflective layer to the first surface of the driving substrate;
the light-emitting components are arranged around the light-emitting components, and the light-emitting components are arranged to be convex relative to the first surface, so that a plurality of cavities are formed between the light-emitting components and the first surface.
According to another aspect of the present disclosure, a backlight module is provided, which includes a light source assembly and an optical film set disposed on one side of the light source assembly, where the light source assembly is the light source assembly described in any of the above embodiments.
According to another aspect of the present application, a display device is provided, which includes a backlight module and a display panel, the backlight module is the backlight module in the above embodiments.
According to the light source assembly, the preparation method of the light source assembly, the backlight module and the display device, the reflecting layer is provided with the light emitting reflecting part protruding outwards, so that the reflecting layer is provided with the rough surface with unevenness, light emitted by the light emitting elements is changed into diffuse reflection after being irradiated onto the reflecting layer, when the light source assembly is applied to the direct type backlight module, the efficiency of the light emitting elements entering the optical film set upwards is improved, and the utilization rate of the light source is further improved.
In addition, the reflecting layer can directly form a plurality of light-emitting reflecting parts, and the light-emitting reflecting parts and the first surface of the driving substrate form a cavity, compared with the method that the microstructure is directly etched on the driving substrate and high-reflection printing ink is coated, the reflecting layer can be detached from the driving substrate without heating and curing, the process is simplified, the cost is reduced, the probability of appearance of poor products is reduced, meanwhile, the reflectivity is not reduced due to the influence of high temperature in the soldering process, and the light source utilization rate of the backlight module is improved. In addition, the thickness of the backlight module is further reduced, and the design requirement of lightness and thinness is met.
Drawings
FIG. 1 is a schematic diagram illustrating an emergent luminance distribution of a light source module according to an embodiment of the prior art;
FIG. 2 is an exploded view of a display device according to an embodiment of the present disclosure;
FIG. 3 is a schematic cross-sectional view of a light source assembly of the backlight module shown in FIG. 2;
FIG. 4 is a schematic cross-sectional view of the reflective layer of the light source module shown in FIG. 3;
FIG. 5 is a schematic diagram illustrating a relative relationship between two adjacent light-emitting reflectors in a light source module according to an embodiment of the present disclosure;
FIG. 6 is a schematic view illustrating a distribution of light-emitting elements and light-emitting reflectors around the light-emitting elements in a light source module according to an embodiment of the present disclosure;
FIG. 7 is a schematic view illustrating a distribution of light-emitting elements and light-emitting reflectors around the light-emitting elements in a light source module according to another embodiment of the present disclosure;
FIG. 8 is a schematic view illustrating a distribution of light-emitting elements and light-emitting reflectors around the light-emitting elements in a light source module according to still another embodiment of the present disclosure;
FIG. 9 is a schematic view illustrating a distribution of light-emitting elements and light-emitting reflectors around the light-emitting elements in a light source module according to yet another embodiment of the present application;
FIG. 10 is a schematic view illustrating a distribution of light-emitting elements and light-emitting reflectors around the light-emitting elements in a light source module according to yet another embodiment of the present application;
fig. 11 is a block flow diagram illustrating a method for manufacturing a light source module according to an embodiment of the present disclosure.
Detailed Description
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein.
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.
With the wide application of liquid crystal display technology, information display technology has been greatly developed, and people have also made higher demands on display devices. For example, display modules with higher resolution, more vivid display effects, and higher brightness and light effects have become the design direction of developers. However, since the liquid crystal display does not have the light emitting characteristic, and the liquid crystal display needs to provide the illumination light source by using the backlight module, the design of the backlight source with better efficiency and compact structure is an important direction for improving the display performance of the liquid crystal display.
With the application of High-Dynamic Range (HDR) technology, the direct-type backlight structure is emphasized by display manufacturers due to its characteristics of controllable local area light and High backlight efficiency, and is widely applied to large-size display devices. For a direct-type LED backlight module applied in an LCD display device, the LED light emitting elements in the backlight module form a surface light source in an array manner. Fig. 1 shows a schematic diagram of the distribution of the emergent luminance of the backlight module in an embodiment of the prior art, where the abscissa is the distance and the ordinate is the luminance, and as the center distance C between the LED light emitting elements B increases, the farther the center distance C between the LED light emitting elements B is, the less light will be emitted between the adjacent LED light emitting elements B, so that a dark band region is formed between the adjacent LED light emitting elements B.
At present, in the field of large-size display such as televisions, a method for eliminating dark bands is to add lens packages on each LED light emitting element to increase the light emitting divergence angle of the LED light emitting element, coat highly reflective ink on a driving substrate to improve brightness, and simultaneously increase light mixing distance and match a diffusion film, but the effect is limited and the backlight module has a large thickness. For small-size display fields such as mobile phones, the size of a light-emitting element is between hundreds of micrometers and millimeters, the cost of mounting a micro-lens is very high, the cost is increased by increasing the light mixing distance and increasing the diffusion film, the thickness of the backlight module is further increased, and the design requirement of lightness and thinness cannot be met. Coating high reflection printing ink on the drive base plate, on the one hand need heat the solidification, and the technology is complicated, has increased the probability that bad product appears, and on the other hand, reflection printing ink receives high temperature influence such as the soldering in-process easily and yellows and cause the reflectivity to reduce, and on the other hand, to the emergent light below the horizontal angle, high reflection printing ink often reflects light to the distant of horizontal direction, leads to backlight unit's light source can't effectively utilize.
Therefore, it is desirable to provide a light source assembly and a backlight module, which can simplify the process, reduce the cost, and achieve the lightness and thinness, and simultaneously effectively improve or eliminate the dark bands and the lamp shadows, and improve the light source utilization rate of the light source assembly in the direct-type backlight module.
The display device in the embodiment of the application can be configured to be used for the following operations: an electronic book reader, a Global Positioning System (GPS) device, a camera, a Personal Digital Assistant (PDA), a computer monitor, a television, a video screen, a large display (e.g., an information sign or billboard), a handheld electronic device, a mobile device (e.g., a cellular phone or a smart phone), a tablet device, a wearable device (e.g., a smart watch), a head-mountable display, or other electronic devices to which the display apparatus of embodiments of the present application can be applied.
Fig. 2 is an exploded schematic view of a display device in an embodiment of the present application.
Referring to fig. 2, the display device 100 in an embodiment of the present disclosure includes a display panel 10 and a backlight module 20 stacked together.
The Display panel 10 may be a Liquid Crystal Display (LCD) panel 10, and the backlight module 20 (BLU) in the embodiment of the present disclosure is a direct-type backlight module 20, which is located below the Display panel 10 and is used for providing a Light source for the Display panel 10, that is, Light emitted from the backlight module 20 provides Light for the Display panel 10.
It is understood that the LCD display panel is well known to those skilled in the art and is not the focus of the present application, and thus, the detailed structure and principle thereof will not be described herein.
The backlight module 20 includes a light source assembly 22 and an optical film set 24 disposed at one side of the light source assembly 22, wherein the optical film set 24 is disposed between the display panel 10 and the light source assembly 22. Specifically, the optical film set 24 includes an upper diffusion sheet 242, an upper brightness enhancement sheet 244, a lower brightness enhancement sheet 246, a lower diffusion sheet 248 and a light guide layer 249 stacked in sequence along a direction in which the display panel 10 points to the light source assembly 22. The upper diffuser 242 and the lower diffuser 248 are configured to correct a diffusion angle so that a light radiating area becomes large, for example, in some embodiments, the upper diffuser 242 and the lower diffuser 248 may include a transparent substrate and optical light scattering particles coated on opposite side surfaces of the transparent substrate. Since the light passing through the upper diffuser 242 and the lower diffuser 248 reduces the light intensity per unit area, in order to meet the brightness requirement of the display panel 10, films for increasing brightness, i.e., the upper brightness enhancement sheet 244 and the lower brightness enhancement sheet 246, are required. In one embodiment, the upper brightness enhancement sheet 244 and the lower brightness enhancement sheet 246 can be prismatic films comprising a transparent film and a uniform and ordered prismatic structure distributed across the film to uniformly converge the diverging light from the lower diffuser sheet 248 to the on-axis angle for increasing the on-axis brightness without increasing the total exiting luminous flux.
It is understood that in other embodiments, optical patch set 24 may include other types of optical patches, such as filter patches. The number of the optical films in the optical film group 24 may be one or more.
Fig. 3 illustrates a schematic cross-sectional view of a light source module 22 in an embodiment of the present application.
Referring to fig. 3, the light source assembly 22 in one embodiment of the present disclosure includes a driving substrate 222, a plurality of light emitting elements 224 disposed on the driving substrate 222, and a reflective layer 226 disposed on the driving substrate 222.
The driving substrate 222 may be a flexible circuit board or a printed circuit board. Since the Mini LED emits light in a lambertian manner, i.e. has the highest light intensity in a direction perpendicular to the light emitting surface, preferably, the light emitting element 224 can be a Mini LED light source, i.e. a submillimeter-sized light emitting diode. Of course, the light emitting element 224 may also be an Organic Light Emitting Diode (OLED) light source or a Quantum dot light emitting diode (QLED) light source, which is not limited herein. Specifically, the driving substrate 222 has a first surface 225, a light source placing region (not shown) is disposed on the first surface 225 of the driving substrate 222, and the light emitting elements 224 are disposed in the light source placing region and uniformly arranged at a certain interval. In one embodiment, the light source placement region of the first surface 225 is provided with conductive pads 221, and each light emitting element 224 is located on at least one of the conductive pads 221 and electrically connected to the driving substrate 222 through the at least one conductive pad 221. Illustratively, the Mini LED has an N-pole and a P-pole on the same side, and the N-pole and the P-pole can be electrically connected to the driving substrate 222 by electrically connecting to a conductive pad 221, respectively, so as to emit light under the driving of the driving substrate 222.
The reflective layer 226 is located on the first surface 225 where the light emitting devices 224 are not disposed, the reflective layer 226 includes a plurality of light emitting reflecting portions 228, and a plurality of light emitting reflecting portions 228 are correspondingly disposed around each light emitting device 224. At least a partial region of the reflective layer 226, which is not provided with the light-emitting reflection portion 228, is in contact with the first surface 225, and the light-emitting reflection portions 228 are configured to be disposed convexly outward relative to the first surface 225 so as to form a plurality of cavities 223 spaced from each other with the first surface 225. Specifically, referring to fig. 4, the reflective layer 226 has an approaching surface 2261 facing the first surface 225 and a reflective surface 2263 facing away from the first surface 225, a plurality of light exiting reflectors 228 are formed on the reflective surface 2263, the approaching surface 2261 has a first area joined to the first surface 225 and a plurality of second areas spaced from the first surface 225 to form a plurality of cavities 223, and projections of the light exiting reflectors 228 on the first surface 225 and corresponding projections of the second areas on the first surface 225 are coincident with each other. Optionally, the cavity 223 is a vacuum cavity or filled with air.
It can be understood that, since the reflective layer 226 is provided with the light-emitting reflective portion 228 protruding outward, so that the reflective layer 226 has an uneven rough surface, light emitted from the light-emitting element 224 is diffused and reflected after being irradiated onto the reflective layer 226, when the light source assembly 22 is applied to the direct-type backlight module 20, the efficiency of the light emitted from the light-emitting element 224 entering the optical film assembly 24 upward is improved, and the utilization rate of the light source is further improved.
As shown in tables 1 and 2, under the same conditions of optical distance of 3.3 mm, 2.8V voltage, and 0.2A current, the average measured point position of 100 points, the luminance of the backlight module 20 was 7203cd/m2(candela/sq m) to 7816cd/m2The uniformity is improved by 8%, and the uniformity is improved from 85% to 87%, and is improved by 2%. As can be seen, with the light source assembly 22 in the embodiment of the present disclosure, the efficiency of the light emitted from the light emitting elements 224 entering the optical film set 24 upwards is improved, and the utilization rate of the light source is further improved.
Fig. 4 shows a schematic cross-sectional view of the reflective layer shown in fig. 3.
In the embodiment of the present application, the reflective layer 226 is configured to have flexibility, and the light-emitting reflecting portions 228 can be formed by a vacuum forming process or a compression molding process. In particular embodiments, as shown in fig. 4, the reflective layer 226 includes a first optical base layer 2262, a second optical base layer 2266, and a foam layer 2264 positioned between the first optical base layer 2262 and the second optical base layer 2266, the first optical base layer 2262 facing the first surface 225 of the driving substrate 222 and contacting the first surface 225 to couple the reflective layer 226 to the first surface 225 of the driving substrate 222. Alternatively, the first and second optical base layers 2262 and 2266 may be formed of polypropylene (PP) and COP optical material, and the foam layer 2264 may be formed of polypropylene and titanium dioxide (Tio)2) The material is formed. The foaming layer 2264 provides flexibility and toughness for the reflective layer 226, so as to form the light-emitting reflective portions 228 by using a vacuum forming process or a compression molding process, and the first optical base layer 2262 and the second optical base layer 2266 provide a reflective effect for the reflective layer 226.
It should be emphasized that, since the reflective layer 226 can directly form a plurality of light-emitting reflective portions 228 coupled to the first surface 225 of the driving substrate 222, compared with the reflective layer formed directly on the driving substrate 222 after etching to form microstructures and then coating highly reflective ink, the reflective layer 226 can be separated from the driving substrate 222 without heating and curing, which simplifies the process, reduces the cost and the probability of occurrence of defective products, and meanwhile, does not suffer from the high temperature effect in the soldering process to reduce the reflectivity, thereby improving the utilization rate of the light source of the backlight module 20. In addition, the thickness of the backlight module 20 is further reduced, and the design requirement of lightness and thinness is met.
Further, the light exit reflector 228 is disposed convexly along the normal direction of the first surface 225, and is arranged along the direction orthogonal to the normal direction of the first surface 225, and the light exit reflector 228 has at least a partial contour boundary which is curved or inclined with respect to the normal direction of the first surface 225 in any cross section parallel to the normal direction of the first surface 225. It can be understood that, since the light-exiting reflection portion 228 has the curved or inclined cross-sectional profile boundary, the propagation direction of the obliquely incident light can be further changed, and the incident light can be emitted in a certain angle, that is, the incident light can be made to approach the normal line of the first surface 225 under the reflection action of the curved or inclined surface of the light-exiting reflection portion 228, so that the brightness between two adjacent light-emitting elements 224 is improved, the dark band region between the light-emitting elements 224 is weakened or eliminated, the uniformity of the display is improved, and the display effect of the display device 100 is further improved. In one embodiment, the curved boundary of the cross-sectional profile may be an arc, for example, when the light-exiting reflector 228 is spherical, the boundary of the cross-sectional profile is an arc. It is needless to say that the curved section contour boundary may be, for example, a parabola shape, a wave shape, or the like, and is not limited herein. The inclined cross-sectional profile boundary may be a straight cross-sectional profile boundary or a non-linear cross-sectional profile boundary, but is inclined generally with respect to the first surface 225 as a whole.
FIG. 5 is a schematic diagram illustrating the relative relationship between adjacent light-exiting reflectors 228 in the light source module 22 according to an embodiment of the present application; FIG. 6 is a schematic diagram illustrating the distribution of the light-emitting elements 224 and the light-emitting reflectors 228 around the light-emitting elements in the light source module 22 according to an embodiment of the present disclosure; fig. 7 is a schematic diagram illustrating the distribution of the light-emitting elements 224 and the light-emitting reflectors 228 around the light-emitting elements in the light source module 22 according to another embodiment of the present disclosure.
In some embodiments, the light-emitting reflecting portions 228 are configured to be arranged at intervals in a direction parallel to the first surface 225, and the light-emitting reflecting portions 228 corresponding to the periphery of each light-emitting element 224 are arranged at intervals in a plurality of rings. Specifically, the center connecting lines of the light-emitting reflectors 228 corresponding to the periphery of each light-emitting element 224 form a plurality of concentric rings with the light-emitting element 224 as the center. As shown in fig. 6, in some embodiments, the light exit reflectors 228 are arranged along a substantially rectangular ring, and as shown in fig. 7, in other embodiments, the light exit reflectors 228 are arranged along a substantially circular ring. It is understood that in other embodiments, the shape of the circular path may be other, such as an ellipse, a polygon, etc., and is not limited herein. In this way, the brightness between two adjacent light emitting elements 224 can be more uniform, the uniformity of display can be improved, and the display effect of the display device 100 can be further improved.
In one embodiment, as shown in fig. 5, each of the light-emitting reflecting portions 228 has a width (diameter) a, a center-to-center distance L between two adjacent light-emitting reflecting portions 228, and a distance P between boundaries of two adjacent light-emitting reflecting portions 228. Wherein, the minimum width a of each light-emitting reflecting portion 228 satisfies the condition: a is more than or equal to 0.4 mm, and the distance P between two adjacent light-emitting reflecting parts 228 meets the following condition: p is more than or equal to 1 mm. Therefore, L is larger than or equal to A +1 mm, that is, the distance P between the boundaries of two adjacent light emitting reflection portions 228 is not less than 1 mm, and the center distance L between two adjacent light emitting emission portions is not less than 1.4 mm. It can be understood that, since the reflective layer 226 in the embodiment of the present disclosure is formed by vacuum forming or compression forming the light exit reflection portion 228 and then coupled to the first surface 225 of the driving substrate 222, in order to ensure the forming effect of the light exit reflection portion 228 under the process conditions, the distance P between the boundaries of two adjacent light exit reflection portions 228 should be greater than or equal to 1 mm, the width (diameter) a of each light exit reflection portion 228 should be greater than or equal to 0.4 mm, and the height H of the light exit reflection portion 228 relative to the first surface 225 satisfies the following condition: h is more than or equal to 0.2 mm.
In some embodiments, as shown in fig. 6 and 7, each light exit reflector 228 has the same structure, and adjacent rectangular rings and adjacent light exit reflectors 228 are arranged at equal intervals. That is, the number of light-emitting reflection portions 228 per ring gradually increases as the ring shape gradually increases from the center to the outside of the light-emitting element 224. That is, among the plurality of rings centered on the light emitting element 224, the number of light exit reflectors 228 arranged on the ring farther from the light emitting element 224 is larger. Of course, the light-emitting reflecting portions 228 may not be identical in structure, as shown in fig. 8-9, in other embodiments, the light-emitting reflecting portions 228 arranged along each ring shape are equally large, and the projection area of the light-emitting reflecting portion 228 on the first surface 225 of the driving substrate 222 increases as the distance from the light-emitting element 224 increases.
As shown in fig. 8-9, the light-emitting reflectors 228 arranged along each ring are equally large, and the projection area of the light-emitting reflector 228 on the first surface 225 of the driving substrate 222 increases as the distance from the light-emitting element 224 increases. The widths a (diameters) of the projections of the light-emitting reflectors 228 on the first surface 225 of the driving substrate 222 are respectively defined as a1, a2, A3 and a4 … An (n is An integer greater than or equal to 2) in sequence from the near side to the far side of the light-emitting element 224, and the center distances of the adjacent light-emitting reflectors 228 are respectively defined as L1, L2 and L3 … Ln (n is An integer greater than or equal to 1) in sequence. Wherein A1 is more than or equal to 0.4 mm, A1 is more than A2 and more than A3 is more than A4 and more than … and is more than An. L1 is more than or equal to A1+1, L2 is more than or equal to A2+1, L3 is more than or equal to A4+1, …, Ln-1 is more than or equal to An + 1. In this way, the light-emitting reflection portion 228 corresponding to each light-emitting element 224 has a larger projection area farther from the light-emitting element 224, so that the light-emitting element 224 has a stronger light-gathering capability, thereby further improving the utilization rate of the light source.
It is understood that, as shown in fig. 6-9, the projection shape of the light exit reflector 228 on the first surface 225 of the driving substrate 222 is a circle, and in other embodiments, the projection shape of the light exit reflector 228 on the first surface 225 of the driving substrate 222 may be a polygon such as a triangle, a square, a rectangle, or a regular or irregular shape such as a star.
It is also understood that the size of the light-emitting reflecting portion 228 can be adjusted according to the requirement, and the light-emitting reflecting portions 228 can be arranged in a mixed manner with different sizes and different shapes.
It should be noted that, since the shape of the light emitting reflection portion 228 may be various, and the size of the light emitting reflection portion 228 along the direction orthogonal to the normal direction of the first surface 225 is not necessarily constant, the size of the projection of the light emitting reflection portion 228 on the first surface 225 of the driving substrate 222 is defined to ensure the molding effect and the reflection effect of the light emitting reflection portion 228. For example, as shown in fig. 6-9, the projection of the light exit reflector 228 on the first surface 225 is a circle, and the minimum width of the projection is the diameter of the circle. For another example, in other embodiments, the projection shape of the light exit reflector 228 on the first surface 225 is other shapes, for example, the projection of the light exit reflector 228 on the first surface 225 is a star shape, and the minimum width of the projection of the light exit reflector 228 on the first surface 225 is the distance between the vertices of the inner angles where the star shapes are opposite to each other and the closest to each other.
In some embodiments, an open area 220 is also defined around the light emitting element 224. As in fig. 6-9, the open area 220 is generally rectangular. The minimum distance of the open area 220 from its adjacent ring shape is defined as D. Wherein D is more than or equal to 0.5A +0.1 mm. That is, the projection boundary of any light-emitting reflector 228 on the innermost ring on the first surface 225 is at least 0.1 mm away from the projection boundary of the corresponding light-emitting element 224 on the first surface 225. In other words, the boundary of the opening area 220 coincides with the boundary of the reflective layer 226, the light emitting element 224 is positioned in the opening area 220, and the reflective layer 226 is not formed in the opening area 220. That is, the reflective layer 226 is formed substantially around the perimeter of the light emitting element 224 with a gap (greater than 0.1 mm) from the light emitting element 224.
Fig. 10 is a schematic view illustrating the distribution of the light-emitting elements 224 and the light-emitting reflectors 228 around the light-emitting elements in the light source module 22 according to another embodiment of the present disclosure.
As shown in fig. 10, the difference between the light-emitting reflection portions 228 of fig. 6-9 is that, in fig. 10, the light-emitting reflection portions 228 are arranged along a random path. Each light-emitting reflecting portion 228 is of equal size, the width (diameter) of each light-emitting reflecting portion 228 is a, the height is H, and the distance between the boundaries of two adjacent light-emitting reflecting portions 228 is P. Wherein, the height H of each light-emitting reflection portion 228 satisfies the condition: h is more than or equal to 0.2 mm, and the minimum width A of each light-emitting reflection part 228 meets the condition: a is more than or equal to 0.4 mm, and the distance P between two adjacent light-emitting reflecting parts 228 meets the following condition: p is more than or equal to 1 mm. The distance between the opening area 220 and the nearest light-emitting reflection portion 228 is defined as D. Wherein D is more than or equal to 0.1 mm. That is, the projection boundary of the light-emitting reflection part 228 located closest to the opening area 220 on the first surface 225 is at least 0.1 mm away from the boundary of the opening area 220.
Fig. 11 illustrates a flow chart of a method of making the light source module 22 in an embodiment of the present application.
As shown in fig. 11, the preparation method comprises the following steps:
step S110: providing a driving substrate 222 and a reflective layer 226;
the reflection layer 226 is formed with a plurality of light exit reflection portions 228 disposed convexly by vacuum forming or compression molding, and specifically, the reflection layer 226 is configured to have flexibility and be capable of forming the plurality of light exit reflection portions 228 using, for example, a vacuum forming process or a compression molding process. In particular embodiments, the reflective layer 226 includes a first optical base layer 2262, a second optical base layer 2266, and a foam layer 2264 disposed between the first optical base layer 2262 and the second optical base layer 2266, the first optical base layer 2262 faces the first surface 225 of the driving substrate 222 and contacts the first surface 225 to couple the reflective layer 226 to the first surface 225 of the driving substrate 222. Alternatively, the first and second optical base layers 2262 and 2266 may be formed of polypropylene (PP) and COP optical material, and the foam layer 2264 may be formed of polypropylene and titanium dioxide (Tio2) material. The foaming layer 2264 provides flexibility and deformation for the reflective layer 226, so as to form the light-emitting reflective portions 228 by using a vacuum forming process or a compression molding process, and the first optical base layer 2262 and the second optical base layer 2266 provide a reflective effect for the reflective layer 226.
Step S120: disposing a plurality of light emitting elements 224 on the first surface 225 of the driving substrate 222 and electrically connecting the driving substrate 222;
specifically, a conductive layer is formed on the first surface 225 of the driving substrate 222, and then patterned to form a plurality of conductive pads 221 disposed at intervals. In one embodiment, the light emitting element 224 is a Mini LED, the conductive pads 221 are substantially rectangular and are arranged in pairs, and each pair of conductive pads 221 includes a first conductive pad 221 and a second conductive pad 221 for electrically connecting to the N-pole and the P-pole of the light emitting element 224, respectively. The first conductive pad 221 and the second conductive pad 221 are respectively connected to a circuit of the driving substrate 222.
Step S130: coupling the reflective layer 226 to the first surface 225 of the driver substrate 222;
a plurality of light-emitting reflectors 228 are correspondingly disposed around each light-emitting element 224, and the light-emitting reflectors 228 are configured to be outwardly protruded relative to the first surface 225 so as to form a plurality of cavities 223 spaced from each other with the first surface 225. Optionally, the cavity is a vacuum cavity or filled with air.
In the light source assembly 22, the manufacturing method thereof, the backlight module 20 and the display device 100, since the reflective layer 226 is provided with the light-emitting reflection portion 228 protruding outward, the reflective layer 226 has an uneven rough surface, so that light emitted from the light-emitting element 224 is diffused and reflected after being irradiated onto the reflective layer 226, when the light source assembly 22 is applied to the direct-type backlight module 20, the efficiency of the light emitted from the light-emitting element 224 being incident onto the optical film assembly 24 is improved, and the utilization rate of the light source is further improved. The brightness of light between two adjacent light emitting elements 224 is also improved, so that the dark band region between the light emitting elements 224 is weakened or eliminated, the uniformity of display is improved, and the display effect of the display device 100 is further improved. In addition, since the reflective layer 226 can directly form a plurality of light-emitting reflective portions 228 coupled to the first surface 225 of the driving substrate 222, compared with a method of directly forming a high-reflective ink on the driving substrate 222, the reflective layer 226 can be separated from the driving substrate 222 without heating and curing, which simplifies the process, reduces the cost and the probability of defective products, and meanwhile, does not suffer from the high temperature influence in the soldering process to cause the reduction of the reflectivity, thereby improving the utilization rate of the light source of the backlight module 20. In addition, the thickness of the backlight module 20 is further reduced, and the design requirement of lightness and thinness is met.
The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (12)
1. A light source assembly, comprising:
a driving substrate having a first surface;
a plurality of light emitting elements disposed on the first surface and electrically connected to the driving substrate;
the reflecting layer is coupled to an area, which is not provided with the light emitting elements, of the first surface, and comprises a plurality of light emitting reflecting parts, and a plurality of light emitting reflecting parts are correspondingly arranged around each light emitting element;
the light-emitting reflecting parts are configured to be arranged outwards and convexly relative to the first surface so as to form a plurality of cavities which are spaced from each other with the first surface.
2. A light source assembly, comprising:
a driving substrate having a first surface;
a plurality of light emitting elements disposed on the first surface and electrically connected to the driving substrate;
a reflective layer located at a region of the first surface where the light emitting element is not disposed, the reflective layer having an approaching surface facing the first surface and a reflective surface facing away from the first surface; and
the light-emitting reflecting parts are arranged on the reflecting surface and are outwards and convexly arranged relative to the first surface, and a plurality of light-emitting reflecting parts are correspondingly arranged around each light-emitting element;
wherein the approach surface has a first region joined to the first surface and a plurality of second regions forming a plurality of cavities spaced from each other with the first surface therebetween;
the projection of each light-emitting reflection part on the first surface and the projection of the corresponding second area on the first surface are coincident with each other.
3. The light source assembly according to claim 1 or 2, wherein the cavity is a vacuum cavity or is filled with air.
4. The light source assembly according to claim 1 or 2, wherein the light emitting reflectors corresponding to the periphery of each of the light emitting elements are arranged in a plurality of annular shapes at intervals.
5. The light source module as recited in claim 4, wherein each of the light-emitting reflectors has the same configuration; or
In the light-emitting reflection parts corresponding to the periphery of each light-emitting element, the projection area of the light-emitting reflection part on the first surface is larger the farther the light-emitting reflection part is from the light-emitting element; and/or
Among the plurality of rings, the number of the light exit reflection portions arranged on the ring farther from the light emitting element is larger.
6. The light source assembly according to claim 4, wherein the light emitting reflector satisfies the following condition:
the height H of the light-emitting reflection part relative to the first surface is more than or equal to 0.2 mm; the minimum width A of the projection of the light-emitting reflection part on the first surface is more than or equal to 0.4 mm; and/or
The pitch P between two adjacent light-emitting reflecting parts meets the following condition: p is more than or equal to 1 mm.
7. The light source assembly according to claim 4, wherein a projection boundary of any one of the light emitting reflectors on the innermost one of the rings on the first surface is a distance D from a projection boundary of the light emitting element on the first surface, and the distance D satisfies the following condition:
d is more than or equal to 0.1 mm.
8. The light source assembly of claim 1 or 2, wherein the reflective layer comprises a first optical base layer, a second optical base layer, and a foamed layer between the first and second optical base layers;
the first optical base material faces the first surface of the drive substrate.
9. The light source assembly according to claim 1 or 2, wherein the light exit reflectors are convexly disposed in a direction normal to the first surface and are arranged in a direction orthogonal to the normal direction of the first surface;
the light-emitting reflecting part is provided with at least part of contour boundary which is curved or inclined relative to the normal direction of the first surface along any section parallel to the normal direction of the first surface.
10. A method of producing a light source module, comprising the steps of:
providing a driving substrate and a reflecting layer; the reflecting layer is formed with a plurality of light-emitting reflecting parts through vacuum forming or compression molding;
arranging a plurality of light-emitting elements on the first surface of the driving substrate and electrically connecting the light-emitting elements with the driving substrate;
coupling the reflective layer to the first surface of the driving substrate; the light-emitting components are arranged around the light-emitting components, and the light-emitting components are arranged to be convex relative to the first surface, so that a plurality of cavities are formed between the light-emitting components and the first surface.
11. A backlight module comprising a light source module and an optical film set disposed on one side of the light source module, wherein the light source module is the light source module as claimed in any one of claims 1 to 9.
12. A display device comprising a backlight module and a display panel, wherein the backlight module is the backlight module according to claim 11.
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| CN202110447430.8A CN113093433A (en) | 2021-04-25 | 2021-04-25 | Light source assembly, preparation method thereof, backlight module and display device |
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Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1469168A (en) * | 2002-07-03 | 2004-01-21 | ���ǵ�����ʽ���� | Back light assembly and liquid crystal display device with the same assembly |
| CN1658042A (en) * | 2004-02-19 | 2005-08-24 | 三星电子株式会社 | Light emitting device and display apparatus having the same |
| CN101358713A (en) * | 2007-08-01 | 2009-02-04 | 奇美电子股份有限公司 | Directly-down back light module unit and LCD using the directly-down back light module unit |
| CN101563566A (en) * | 2006-12-26 | 2009-10-21 | 夏普株式会社 | Lighting system for display apparatus and display apparatus |
| WO2012176710A1 (en) * | 2011-06-24 | 2012-12-27 | シャープ株式会社 | Stereoscopic display system |
| CN107250659A (en) * | 2015-02-25 | 2017-10-13 | 夏普株式会社 | Lighting device, display device and radiovisor |
| JP2018045972A (en) * | 2016-09-16 | 2018-03-22 | 日亜化学工業株式会社 | Light emitting device |
| CN109427758A (en) * | 2017-08-31 | 2019-03-05 | 日亚化学工业株式会社 | Light emitting device |
| KR20190133878A (en) * | 2018-05-24 | 2019-12-04 | 엘지이노텍 주식회사 | Lighting module and lighting apparatus |
| JP2020149966A (en) * | 2019-03-08 | 2020-09-17 | 日亜化学工業株式会社 | Light source device |
| JP2020154128A (en) * | 2019-03-20 | 2020-09-24 | 日亜化学工業株式会社 | Image display device and control method of the same |
| CN112198713A (en) * | 2020-10-21 | 2021-01-08 | 业成科技（成都）有限公司 | Light source assembly, preparation method thereof, backlight module and display device |
-
2021
- 2021-04-25 CN CN202110447430.8A patent/CN113093433A/en active Pending
Patent Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1469168A (en) * | 2002-07-03 | 2004-01-21 | ���ǵ�����ʽ���� | Back light assembly and liquid crystal display device with the same assembly |
| CN1658042A (en) * | 2004-02-19 | 2005-08-24 | 三星电子株式会社 | Light emitting device and display apparatus having the same |
| CN101563566A (en) * | 2006-12-26 | 2009-10-21 | 夏普株式会社 | Lighting system for display apparatus and display apparatus |
| CN101358713A (en) * | 2007-08-01 | 2009-02-04 | 奇美电子股份有限公司 | Directly-down back light module unit and LCD using the directly-down back light module unit |
| WO2012176710A1 (en) * | 2011-06-24 | 2012-12-27 | シャープ株式会社 | Stereoscopic display system |
| CN107250659A (en) * | 2015-02-25 | 2017-10-13 | 夏普株式会社 | Lighting device, display device and radiovisor |
| JP2018045972A (en) * | 2016-09-16 | 2018-03-22 | 日亜化学工業株式会社 | Light emitting device |
| CN109427758A (en) * | 2017-08-31 | 2019-03-05 | 日亚化学工业株式会社 | Light emitting device |
| KR20190133878A (en) * | 2018-05-24 | 2019-12-04 | 엘지이노텍 주식회사 | Lighting module and lighting apparatus |
| JP2020149966A (en) * | 2019-03-08 | 2020-09-17 | 日亜化学工業株式会社 | Light source device |
| JP2020154128A (en) * | 2019-03-20 | 2020-09-24 | 日亜化学工業株式会社 | Image display device and control method of the same |
| CN112198713A (en) * | 2020-10-21 | 2021-01-08 | 业成科技（成都）有限公司 | Light source assembly, preparation method thereof, backlight module and display device |
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Application publication date: 20210709 |