CN114942546A - Mini LED backlight module with large light-emitting angle - Google Patents
Mini LED backlight module with large light-emitting angle Download PDFInfo
- Publication number
- CN114942546A CN114942546A CN202210615243.0A CN202210615243A CN114942546A CN 114942546 A CN114942546 A CN 114942546A CN 202210615243 A CN202210615243 A CN 202210615243A CN 114942546 A CN114942546 A CN 114942546A
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- China
- Prior art keywords
- transparent film
- light
- lamp bead
- backlight module
- led backlight
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- 239000011324 bead Substances 0.000 claims abstract description 40
- 239000003292 glue Substances 0.000 claims description 9
- LAXBNTIAOJWAOP-UHFFFAOYSA-N 2-chlorobiphenyl Chemical compound ClC1=CC=CC=C1C1=CC=CC=C1 LAXBNTIAOJWAOP-UHFFFAOYSA-N 0.000 description 4
- 101710149812 Pyruvate carboxylase 1 Proteins 0.000 description 4
- 230000008901 benefit Effects 0.000 description 3
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 230000014509 gene expression Effects 0.000 description 2
- 230000004075 alteration Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Images
Classifications
-
- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
- G02F1/1336—Illuminating devices
- G02F1/133602—Direct backlight
- G02F1/133603—Direct backlight with LEDs
-
- 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
Landscapes
- Physics & Mathematics (AREA)
- Nonlinear Science (AREA)
- Mathematical Physics (AREA)
- Chemical & Material Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Non-Portable Lighting Devices Or Systems Thereof (AREA)
Abstract
The invention discloses a MiniLED backlight module with a large light-emitting angle, which comprises a PCB (printed circuit board), a lamp bead structure and a support frame, wherein the lamp bead structure is arranged on the front surface of the PCB in an array manner, the front surface of the PCB is provided with a lamp bead mounting opening, and the bottom of the lamp bead mounting opening is provided with a contact element; the lamp bead structure comprises a light-emitting piece, a first transparent film and a second transparent film; the light-emitting piece is arranged inside the lamp bead mounting opening and is electrically connected with the contact piece; the top of the first transparent film and the top of the second transparent film are both spherical surfaces, and the first transparent film is arranged at the bottom of the second transparent film; the first transparent film is embedded into a gap between the luminous piece and the lamp bead mounting opening. The light rays at the junction of the first transparent film and the second transparent film are refracted, so that the light ray emitting angle of the light-emitting piece is increased, and the thickness of the backlight module can be further reduced.
Description
Technical Field
The invention relates to the technical field of LED backlight lamps, in particular to a Mini LED backlight module with a large light-emitting angle.
Background
With the development of display panel technology, people are increasingly pursuing lighter, thinner and larger flexible display screens. The Mini LED backlight display screen adopted at present has the advantages of high color gamut and high contrast, and is long in service life, high in reliability, light, thin and capable of being spliced to be large in size.
Because the light intensity at the top end of the lamp bead structure is larger, the light mixing distance OD (optical distance) can not be further reduced, and the thickness of the backlight module can not be further reduced, the problem of how to improve the light-emitting angle of the Mini LED backlight module is to be solved.
Disclosure of Invention
Technical problem to be solved
Aiming at the defects of the prior art, the invention provides a Mini LED backlight module with a large light-emitting angle, which solves the problem that the thickness of the conventional backlight module cannot be further reduced.
(II) technical scheme
In order to achieve the purpose, the invention is realized by the following technical scheme:
a Mini LED backlight module with a large light-emitting angle comprises a PCB (printed Circuit Board) 1, lamp bead structures 2 and a support frame 3, wherein the lamp bead structures 2 are arranged on the front surface of the PCB 1 in an array manner, the front surface of the PCB 1 is provided with a lamp bead mounting opening 4, and the bottom of the lamp bead mounting opening 4 is provided with a contact element 5;
the lamp bead structure 2 comprises a luminous piece 7, a first transparent film 8 and a second transparent film 9; the luminous piece 7 is arranged inside the lamp bead mounting opening 4, and the luminous piece 7 is electrically connected with the contact piece 5; the top of the first transparent film 8 and the top of the second transparent film 9 are both spherical surfaces, and the first transparent film 8 is arranged at the bottom of the second transparent film 9; the first transparent film 8 is embedded into a gap between the luminous piece 7 and the lamp bead mounting opening 4, the second transparent film 9 is located right above a luminous region of the luminous piece 7, and the downward projection of the second transparent film 9 completely falls into the luminous region of the luminous piece 7.
Optionally, the bottom of the glowing member 7 has contacts that contact the top end of the contact member 5.
Optionally, the bottom end of the contact 5 penetrates through the PCB board 1, and the contact 5 is electrically connected with a circuit 6 arranged on the back surface of the PCB board 1;
the back of the PCB board 1 is also provided with a driving module, and the driving module is electrically connected with the circuit 6.
Optionally, the support frame 3 is tapered, and the support frame 3 is fixedly connected to the front surface of the PCB board 1.
Optionally, the first transparent film 8 and the second transparent film 9 are both made by twice dispensing, and an interface is formed between the upper surface of the first transparent film 8 and the bottom of the second transparent film 9; the first transparent film 8 and the second transparent film 9 are made of the same kind of transparent glue.
Optionally, the first transparent film 8 and the second transparent film 9 are made of two different kinds of light-transmitting glue.
Optionally, the depth of the lamp bead mounting opening 4 is 0.3-0.75 mm, the height of the light emitting piece 7 is 0.2-0.6mm, and the height of the light emitting piece 7 is smaller than the depth of the lamp bead mounting opening 4.
Optionally, the height from the top of the light emitting member 7 to the upper surface of the first transparent film 8 is 0.1-0.3mm, the cross-sectional shape of the second transparent film 9 is a crescent, and the thickness of the second transparent film 9 is 0.15-0.25 mm.
(III) advantageous effects
The invention provides a Mini LED backlight module with a large light-emitting angle, which has the following beneficial effects:
1. according to the invention, by adopting the first transparent film and the second transparent film, light rays can be refracted at the junction of the first transparent film and the second transparent film, so that the light emitting angle of the light emitting element is increased, and the further reduction of the thickness of the backlight module becomes possible.
2. The first transparent film adopts a large-radian spherical surface, the thickness of the side part of the first transparent film is lower, large-angle light rays can be emitted conveniently, the large-angle light rays formed by refraction are overlapped with the large-angle light rays directly formed by the first transparent film, so that the area above the lamp bead structure can have uniform light rays, and the definition of a display screen can be further increased.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without inventive exercise.
Fig. 1 is a schematic perspective view of the present embodiment;
fig. 2 is a schematic perspective view of a PCB provided in this embodiment;
FIG. 3 is an enlarged view taken at A in FIG. 2;
fig. 4 is a schematic view of a lamp bead structure provided in this embodiment;
fig. 5 is a schematic view of the light emission of the lamp bead provided in this embodiment;
in fig. 5, the broken line indicates the light path.
The diagram is as follows:
1. a PCB board; 2. a lamp bead structure; 3. a support frame; 4. a lamp bead mounting port; 5. a contact member; 6. a line; 7. a light emitting member; 8. a first transparent film; 9. a second transparent film.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The terms "first," "second," "third," and the like in the description and in the claims, as well as in the drawings, if any, are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the objects so described are interchangeable under appropriate circumstances. Furthermore, the terms "comprising" and "having," as well as any variations thereof, are intended to cover non-exclusive inclusions.
In the present disclosure, the drawings discussed below and the embodiments used to describe the principles of the present disclosure are for illustration purposes only and should not be construed to limit the scope of the present disclosure. Those skilled in the art will understand that the principles of the present invention may be implemented in any suitably arranged system. Reference will now be made in detail to the exemplary embodiments, examples of which are illustrated in the accompanying drawings. Further, a terminal according to an exemplary embodiment will be described in detail with reference to the accompanying drawings. Like reference symbols in the various drawings indicate like elements.
The terms used in the description of the present invention are only used to describe specific embodiments, and are not intended to show the concept of the present invention. Unless the context clearly dictates otherwise, expressions used in the singular form encompass expressions in the plural form. In the present specification, it is to be understood that terms such as "comprising," "having," and "containing" are intended to specify the presence of stated features, integers, steps, acts, or combinations thereof, as taught in the present specification, and are not intended to preclude the presence or addition of one or more other features, integers, steps, acts, or combinations thereof. Like reference symbols in the various drawings indicate like elements.
Aiming at the defects of the prior art, the invention provides a Mini LED backlight module with a large light-emitting angle, which solves the problem that the thickness of the conventional backlight module cannot be further reduced.
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in further detail below.
The light emitted by the luminous element 7 travels forwards, and the angle of its divergent light can be considered as 180 ° in theory, but according to the actual use requirement: the light emitting angle of 50% of the total light intensity is about 110-150 degrees, and the light emitting angle of 30% of the total light intensity is about 140-165 degrees, so that the light emitting angle of the Mini LED backlight module is increased, which is to increase the light intensity in a large-angle area range.
The first embodiment is as follows:
as shown in fig. 1 to 5, the Mini LED backlight module with a large light-emitting angle provided in this embodiment includes a PCB board 1, a lamp bead structure 2, and a supporting frame 3. The lamp bead structure 2 is arranged in the front of the PCB 1 in an array mode, and the lamp bead mounting opening 4 is formed in the front of the PCB 1 and used for mounting the lamp bead structure 2. The bottom of the lamp bead mounting opening 4 is provided with a contact element 5. The contact 5 is a copper wire, and the upper end of the copper wire is pressed to form a protruding circle. The lamp bead structure 2 comprises a luminous member 7, a first transparent film 8 and a second transparent film 9. The illuminating part 7 is a light-emitting chip and is electrically connected with the contact element 5, and the illuminating part 7 is arranged in the lamp bead mounting opening 4 and can adopt a square structure. The first transparent film 8 is embedded in a gap between the luminous piece 7 and the lamp bead mounting opening 4. The top of the first transparent film 8 is spherical and functions to fix the luminous member 7, and a portion of the top thereof serves to protect the luminous member 7 and allows light to pass therethrough. The bottom of the second transparent film 9 is fixedly connected with the top of the first transparent film 8, and the top of the second transparent film 9 is a spherical surface. The second transparent film 9 is positioned right above the light emitting region of the light emitting member 7, and a downward projection of the second transparent film 9 falls entirely inside the light emitting region of the light emitting member 7. As shown in fig. 5, such a design enables a part of light to be transmitted through the first transparent film 8 at a large angle, and a part of light to be refracted through the interface between the first transparent film 8 and the second transparent film 9 at a large angle.
Further, the bottom of the luminous member 7 has a contact point which comes into contact with the top end of the contact member 5 when the luminous member 7 is mounted inside the lamp bead mounting opening 4. Two of the contacts and the contact piece 5 are arranged.
Furthermore, the bottom end of the contact 5 penetrates through the PCB board 1, and the contact 5 is electrically connected with a circuit 6 arranged on the back surface of the PCB board 1. The back of the PCB board 1 is also provided with a driving module, and the circuit 6 is electrically connected with the driving module so as to realize that the driving module controls the luminous piece 7.
Further, the supporting frame 3 is tapered, and may be tapered with a small upper part and a large lower part. The support frame 3 is fixedly connected to the front side of the PCB board 1 and mainly used for supporting the screen board above. Thus, the thickness between the screen board and the PCB board 1 can be reduced.
In this embodiment, first transparent film 8 and second transparent film 9 adopt the same kind of transparent glue to make, first transparent film 8 and second transparent film 9 all adopt twice some to glue and generate, just promptly glue for the first time and carry out preliminary curing, then glue for the second time, carry out the curing for the second time, make the upper surface of first transparent film 8 and the 9 bottoms formation interfaces of second transparent film, light can produce the refraction when passing through this interface, in original angle, further outside increase, form the light angle of being bare.
In this embodiment, the depth of the lamp bead mounting opening 4 is 0.3-0.75 mm, and the height of the light emitting member 7 is 0.2-0.6mm, wherein the height of the light emitting member 7 is smaller than the depth of the lamp bead mounting opening 4, so that the light emitting member 7 can be completely embedded into the lamp bead mounting opening 4.
In this embodiment, the height of the upper surface of the first transparent film 8 from the top of the light emitting member 7 is 0.1 to 0.3mm, the cross-sectional shape of the second transparent film 9 is crescent-shaped, and the thickness of the second transparent film 9 is 0.15 to 0.25 mm.
The second embodiment:
the difference between the present embodiment and the first embodiment is: first transparent film 8 and second transparent film 9 adopt two kinds of different clear glues, and light also can take place to refract when passing through different mediums, and the benefit of this embodiment is that first transparent film 8 and second transparent film 9 can be made in relatively short time, and for the twice point of comparison document 1 is glued, increase production efficiency.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (8)
1. The utility model provides a Mini LED backlight unit of big light-emitting angle, includes PCB board (1), lamp pearl structure (2) and support frame (3), lamp pearl structure (2) array is arranged PCB board (1) is positive, its characterized in that: a lamp bead mounting opening (4) is formed in the front side of the PCB (1), and a contact element (5) is arranged at the bottom of the lamp bead mounting opening (4);
the lamp bead structure (2) comprises a luminous piece (7), a first transparent film (8) and a second transparent film (9); the light-emitting piece (7) is arranged inside the lamp bead mounting opening (4), and the light-emitting piece (7) is electrically connected with the contact piece (5); the top of the first transparent film (8) and the top of the second transparent film (9) are both spherical surfaces, and the first transparent film (8) is arranged at the bottom of the second transparent film (9); first transparent film (8) embedding illuminating part (7) with in the clearance between lamp pearl installing port (4), second transparent film (9) are located illuminating part (7) is luminous directly over, the downward projection of second transparent film (9) falls completely inside illuminating part (7) is luminous.
2. The Mini LED backlight module with a large light-emitting angle as claimed in claim 1, wherein: the bottom of the illuminating element (7) has a contact point which is in contact with the top end of the contact element (5).
3. The Mini LED backlight module with a large light-emitting angle of claim 2, wherein: the bottom end of the contact element (5) penetrates through the PCB (1), and the contact element (5) is electrically connected with a circuit (6) arranged on the back surface of the PCB (1);
the back of the PCB (1) is further provided with a driving module, and the driving module is electrically connected with the circuit (6).
4. The Mini LED backlight module with a large light-emitting angle as claimed in claim 1, wherein: the support frame (3) is conical, and the support frame (3) is fixedly connected to the front surface of the PCB (1).
5. The Mini LED backlight module with large light-emitting angle according to any one of claims 1 to 4, wherein: the first transparent film (8) and the second transparent film (9) are both made by twice dispensing, and the upper surface of the first transparent film (8) and the bottom of the second transparent film (9) form an interface; the first transparent film (8) and the second transparent film (9) are made of the same transparent glue.
6. The Mini LED backlight module with large light-emitting angle according to any one of claims 1 to 4, wherein: the first transparent film (8) and the second transparent film (9) are made of two different kinds of light-transmitting glue.
7. The Mini LED backlight module with a large light-emitting angle of claim 1, wherein: the depth of the lamp bead mounting opening (4) is 0.3-0.75 mm, the height of the luminous piece (7) is 0.2-0.6mm, and the height of the luminous piece (7) is smaller than the depth of the lamp bead mounting opening (4).
8. The Mini LED backlight module with a large light-emitting angle as claimed in claim 1, wherein: the upper surface distance of first transparent film (8) the height at the top of luminous piece (7) is 0.1-0.3mm, the cross sectional shape of second transparent film (9) is crescent, the thickness of second transparent film (9) is 0.15-0.25 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210615243.0A CN114942546A (en) | 2022-05-31 | 2022-05-31 | Mini LED backlight module with large light-emitting angle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210615243.0A CN114942546A (en) | 2022-05-31 | 2022-05-31 | Mini LED backlight module with large light-emitting angle |
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| Publication Number | Publication Date |
|---|---|
| CN114942546A true CN114942546A (en) | 2022-08-26 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210615243.0A Pending CN114942546A (en) | 2022-05-31 | 2022-05-31 | Mini LED backlight module with large light-emitting angle |
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| CN (1) | CN114942546A (en) |
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| CN113721386A (en) * | 2021-08-18 | 2021-11-30 | 安徽芯瑞达科技股份有限公司 | Backlight module for increasing Mini LED light-emitting angle and manufacturing method thereof |
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| CN215599468U (en) * | 2021-08-18 | 2022-01-21 | 安徽芯瑞达科技股份有限公司 | Backlight module for increasing Mini LED light-emitting angle |
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| CN103165798A (en) * | 2011-12-09 | 2013-06-19 | 展晶科技(深圳)有限公司 | Light emitting diode (LED) encapsulation structure and lens assembly thereof |
| CN105180092A (en) * | 2015-10-23 | 2015-12-23 | 欧普照明股份有限公司 | Lens and light source module |
| CN105508942A (en) * | 2016-01-21 | 2016-04-20 | 佛山电器照明股份有限公司 | Lens used for lighting device with arc-shaped lampshade and lighting device |
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