CN109085719B - Direct type LED backlight source - Google Patents
Direct type LED backlight source Download PDFInfo
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- CN109085719B CN109085719B CN201810906325.4A CN201810906325A CN109085719B CN 109085719 B CN109085719 B CN 109085719B CN 201810906325 A CN201810906325 A CN 201810906325A CN 109085719 B CN109085719 B CN 109085719B
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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
-
- 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
- G02F1/133611—Direct backlight including means for improving the brightness uniformity
Abstract
The invention provides a direct type LED backlight source which comprises a back plate, lamp beads, a reflector, a scattering component and a double-sided prism diffusion plate, wherein the reflector is arranged above one end of the light emitting surface of the lamp beads and used for reflecting part of light rays of the lamp beads to the scattering component; the scattering component is arranged on the outer side of the lamp beads and used for scattering light rays reflected by the reflector and radiating the double-sided prism diffusion plate, and the double-sided prism diffusion plate is arranged above the reflector and used for scattering the light rays scattered by the scattering component and the light rays transmitted by the lamp beads through the reflector and emitting the light rays. According to the invention, through the arrangement of the light-transmitting opening and the outer reflecting surface of the reflector, the scattering component and the double-sided prism diffusion plate, the light mixing dark space is reduced, the light mixing effect is improved in a short distance on the premise of not increasing the number of lamp beads, and the light mixing distance is shortened.
Description
Technical Field
The invention relates to a backlight source technology, in particular to a direct type LED backlight source.
Background
The existing LCD mostly adopts an LED backlight source to obtain better display colors, the traditional LED backlight source is divided into a direct type LED backlight source and a side type LED backlight source according to the position of a light source, the direct type LED backlight source is mostly adopted for a large-size LCD display, the light efficiency of the direct type LED backlight source is high, but one problem exists:
the direct type LED backlight is difficult to be thinned due to the limitation of the light mixing distance, which is especially important in the liquid crystal display nowadays when the direct type LED backlight is increasingly required to be thinned.
Therefore, how to obtain a uniform light mixing effect in a short distance on the basis of not increasing the number and the density of the light sources becomes a problem to be solved in advance for optical engineers.
Disclosure of Invention
The embodiment of the invention provides a direct type LED backlight source which can improve the light mixing effect and shorten the light mixing distance in a short distance on the premise of not increasing the number of lamp beads; the technical problems that the light mixing effect is poor and the light mixing distance is long under the premise that the number of lamp beads is not increased in the existing direct type LED backlight source are solved.
The embodiment of the invention provides a direct type LED backlight source, which comprises:
a back plate, a back plate and a back plate,
the lamp beads are arranged in a matrix form to form a lamp bead array and are arranged on the back plate;
the reflector is arranged above one end of the light emitting surface of the lamp bead and used for reflecting part of light rays of the lamp bead to the scattering component;
the scattering component is arranged on the outer side of the lamp bead and used for scattering the light rays reflected by the reflector and radiating the light rays to the double-sided prism diffusion plate;
the double-sided prism diffusion plate is arranged above the reflector and used for performing scattering treatment on the light scattered by the scattering component and the light transmitted by the lamp beads through the reflector and emitting the light;
the reflector comprises a light transmitting opening which is opposite to the light emitting surface of the lamp bead and used for transmitting part of lamp bead light, a side plate which is arranged on the peripheral side of the light transmitting opening and an outer reflecting surface which is arranged on the outer side surface of the side plate and used for reflecting part of lamp bead light.
In the first technical scheme of the invention, the side plates comprise first side plates which are positioned at two sides of the light-transmitting opening and provided with the external reflecting surfaces, the reflector is arranged on each row of the lamp beads, the scattering components are correspondingly and alternately arranged with the lamp beads in each row, and the extending direction of the reflector is the same as the extending direction of the scattering components.
In the first technical scheme of the invention, the light-transmitting opening corresponds to the middle area of the lamp bead.
In a first technical solution of the present invention, the side plates further include a second side plate connecting the two first side plates.
In a second technical scheme of the invention, the side plates are positioned around the light-transmitting opening, the reflector is arranged above each lamp bead, and the scattering components are correspondingly arranged around the lamp beads.
In a second technical scheme of the invention, the light-transmitting opening corresponds to a central area of the lamp bead.
In a third technical scheme of the invention, the reflectors are divided into a first reflector corresponding to the peripheral region of the lamp bead array and a second reflector corresponding to the middle region of the lamp bead array, and the scattering component is divided into a first scattering component corresponding to the first reflector and a second scattering component corresponding to the second reflector;
the first reflector comprises a first light transmitting opening which is opposite to the light emitting surface of the lamp beads and used for transmitting part of light rays of the lamp beads, side plates which are arranged around the first light transmitting opening in a surrounding mode, and an outer reflecting surface which is arranged on the outer side surface of each side plate and used for reflecting part of light rays of the lamp beads, the first reflector is arranged above each lamp bead, and the first scattering parts are arranged around the lamp beads;
the second reflector includes just right the lamp pearl light emitting area be used for seeing through the second printing opacity mouth of part lamp pearl light, set up and be in the curb plate of second printing opacity mouth both sides and setting are in the outer plane of reflecting that is used for reflecting part lamp pearl light of curb plate lateral surface, the second reflector sets up at every row on the lamp pearl, what the second scattering component corresponds with every row the lamp pearl sets up in turn, the extending direction of second reflector with the extending direction of second scattering component is the same.
In a third technical solution of the present invention, the first light-transmitting opening corresponds to a central region of the corresponding lamp bead, and the second light-transmitting opening corresponds to a central region of the corresponding lamp bead.
In the invention, the inner side surface of the side plate is provided with an internal reflection surface.
In the invention, the included angle between the plane of the external reflecting surface and the light-emitting surface of the lamp bead is 30-60 degrees.
In the invention, the outer reflecting surface is a plane or a convex curved surface.
In the invention, the direct type LED backlight source also comprises a brightness enhancement film arranged above the double-sided prism diffusion plate.
Compared with the direct type LED backlight source in the prior art, the direct type LED backlight source has the advantages that through the arrangement of the light transmitting opening, the outer reflecting surface and the scattering component of the reflector, light with a small emergent angle of lamp beads is transmitted through the light transmitting opening, light with a large angle is reflected on the scattering component after being reflected by the outer reflecting surface, is mixed with light with a small angle after being scattered by the scattering component and is projected to the double-sided prism diffusion plate, and finally, light is uniformly emitted under the diffusion effect of the double-sided prism diffusion plate; the technical problems that the existing direct type LED backlight source is poor in light mixing effect and long in light mixing distance on the premise that the quantity of lamp beads is not increased are solved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments are briefly described below. The drawings in the following description are only some embodiments of the invention, and it will be clear to a person skilled in the art that other drawings can be derived from them without inventive effort.
FIG. 1 is an exploded view of a first preferred embodiment of a direct LED backlight of the present invention;
FIG. 2 is a schematic cross-sectional view of a direct type LED backlight according to a first preferred embodiment of the present invention;
FIG. 3 is a schematic structural diagram of a reflector of a first preferred embodiment of a direct type LED backlight source of the present invention;
FIG. 4 is an exploded view of a second preferred embodiment of a direct LED backlight of the present invention;
FIG. 5 is a schematic diagram of a reflector of a direct-type LED backlight according to a second preferred embodiment of the present invention;
FIG. 6 is an exploded view of a third preferred embodiment of a direct type LED backlight source of the present invention.
Detailed Description
Refer to the drawings wherein like reference numbers refer to like elements throughout. The following description is based on illustrated embodiments of the invention and should not be taken as limiting the invention with regard to other embodiments that are not detailed herein.
Referring to fig. 1 to 3, fig. 1 is an exploded view of a direct type LED backlight source according to a first preferred embodiment of the present invention; FIG. 2 is a schematic cross-sectional view of a direct type LED backlight according to a first preferred embodiment of the present invention; fig. 3 is a schematic structural diagram of a reflector of a direct type LED backlight according to a first preferred embodiment of the present invention.
The direct type LED backlight source of the first preferred embodiment includes a back plate 11, beads 12, a reflector 13, a scattering component 14, a double-sided prism diffuser plate 15, and a brightness enhancement film 16.
Specifically, the lamp beads 12 are arranged in a matrix form to form a lamp bead array, and are arranged on the back plate 11; the reflector 13 is arranged above one end of the light emitting surface of the lamp bead 12 and used for reflecting part of light of the lamp bead 12 to the scattering component 14; the scattering component 14 is arranged on the outer side of the lamp bead 12 and used for scattering the light reflected by the reflector 13 and radiating the light to the double-sided prism diffusion plate 15; a double-sided prism diffuser 15 is disposed above the reflector 13 for diffusing the light scattered by the diffuser 13 and the light transmitted from the beads 12 through the reflector 13 and emitting the diffused light.
The reflector 13 includes a light-transmitting opening 131 facing the light-emitting surface of the lamp bead 12 for transmitting part of the light of the lamp bead 12, a side plate disposed on the periphery of the light-transmitting opening 131, and an outer reflecting surface 13a disposed on the outer side surface of the side plate for reflecting part of the light of the lamp bead.
In the first preferred embodiment, through the arrangement of the light-transmitting opening 131, the outer reflecting surface 13a and the scattering component 14 of the reflector 13, the light with a small outgoing angle of the lamp beads 12 is transmitted through the light-transmitting opening 131, the light with a large outgoing angle is reflected by the outer reflecting surface 13a and then reflected onto the scattering component 14, and is mixed with the light with a small outgoing angle and projected to the double-sided prism diffusion plate 15 after being diffused by the scattering component 14, and finally, the light is uniformly emitted under the diffusion effect of the double-sided prism diffusion plate 15.
The LED backlight of the first preferred embodiment further includes a brightness enhancement film 16 disposed above the double sided prism diffuser plate 15. The double-sided prism diffuser 15 is used to diffuse the light mixed by the reflector 14 and the like to produce a uniform surface light source.
Specifically, in the first preferred embodiment, the side plates include a first side plate 132 provided with the external reflection surfaces 13a and a second side plate 133 connecting the two first side plates 132, the first side plate is located on both sides of the light-transmitting opening 131, the reflector 13 is disposed on each row of the lamp beads 12, the scattering members 14 are disposed alternately with each row of the lamp beads 12, and the extending direction of the reflector 13 is the same as the extending direction of the scattering members 14.
The reflector can also be arranged on each row of lamp beads, and the scattering component is arranged corresponding to each row of lamp beads in an alternating mode.
The reflector 13 is in the shape of a V-groove, and the transmission opening 131 is located at the bottom of the groove. In addition, the reflector 13 is corresponding to each row of the lamp beads 12, so that the assembly is convenient. And light-transmitting opening 131 is regional corresponding to the middle part of lamp pearl 12, is convenient for reflect the light that lamp pearl 12 sent is equal, improves the homogeneity of reverberation, and then has improved the homogeneity of mixing.
Further, the inner side surface of the side plate is provided with an inner reflection surface 13 b. In the first preferred embodiment, the internal reflection surface 13b is disposed on the inner side surface of the first side plate 132, and is used for reflecting the light radiated to the inner side surface of the first side plate 132 and projecting the light to the double-sided prism diffusion plate 15, so as to improve the light mixing effect.
The internal reflection surface 13b is a plane or a concave arc surface, and when the internal reflection surface is a concave arc surface, the light condensing efficiency is achieved.
In the present invention, the outer reflecting surface 13a is a flat surface or a convex curved surface. In the first preferred embodiment, the outer reflecting surface 13a is preferably a flat surface.
Furthermore, the included angle between the plane of the external reflecting surface 13a and the light-emitting surface of the lamp bead 12 is 30-60 degrees. Such setting is convenient for reflect the wide-angle light that lamp pearl 12 sent to scattering component 14 to furthest's improvement mix the light effect. Preferably, the included angle between the plane of the external reflection surface 13a and the light-emitting surface of the lamp bead 12 is 45 °.
In the first preferred embodiment, the working principle is as follows:
firstly, the lamp beads 12 emit light, wherein a part of light with a small light-emitting angle directly penetrates through the light-transmitting opening 131 of the reflector 13, and the other part of light with a large light-emitting angle is reflected onto the scattering component 14 on the back plate 11 after being reflected by the external reflection surface 13a arranged on the outer side surface of the first side plate 132, and the light is subjected to diffuse reflection on the scattering component 14 and is mixed with the light penetrating through the light-transmitting opening 131; then, the mixed light is emitted to the double-sided prism diffusion plate 15, and after the scattering treatment of the double-sided prism diffusion plate 15, a light source is formed and finally radiated to the display panel.
This completes the operation of the first preferred embodiment.
Referring to fig. 4 and 5, in the second preferred embodiment of the present invention, the LED backlight includes a backlight 21, beads 22 disposed on a back plate 21, a reflector 23 disposed above light-emitting surfaces of the beads 22, scattering members 24 disposed around the beads 22, a double-sided prism diffuser plate (not shown) disposed above the reflector 23, and a brightness enhancement film (not shown) disposed above the double-sided prism diffuser plate. The difference from the first preferred embodiment is that:
232 position light-permeable openings 231 of curb plate are all around, and reflector 23 sets up in the top of every lamp pearl 22, and scattering component 24 corresponds the setting around lamp pearl 22, and such setting has improved the transmitted light quantity to the light that sends of lamp pearl 22, and then has improved mixed effect.
Light-transmitting opening 231 is regional corresponding to the center of lamp pearl 22, is convenient for reflect the light that lamp pearl 22 sent is equal, improves the homogeneity of reverberation, and then has improved the homogeneity of mixing.
In addition, the outer side surfaces of the side plates 232 are provided with outer reflecting surfaces 23a, and the inner side surfaces thereof are provided with inner reflecting surfaces 23 b.
The principle of operation of this second preferred embodiment is the same or similar to that of the first preferred embodiment.
Referring to fig. 6, in a third preferred embodiment of the present invention, an LED backlight includes a back plate 31, an array of beads 32, a reflector, a scattering member, a double-sided prism diffuser plate (not shown) disposed above the reflector, and a brightness enhancement film (not shown) disposed above the double-sided prism diffuser plate. The third preferred embodiment differs from the second preferred embodiment in that:
the reflector is divided into a first reflector 33 corresponding to the peripheral region of the array of lamp beads 32 and a second reflector 34 corresponding to the middle region of the array of lamp beads 32, and the scattering component is divided into a first scattering component 35 corresponding to the first reflector 33 and a second scattering component 36 corresponding to the second reflector;
the first reflector 33 comprises a first light transmitting opening which is opposite to the light emitting surface of the lamp beads 32 and used for transmitting part of the light of the lamp beads, side plates which are arranged around the first light transmitting opening, and an outer reflecting surface which is arranged on the outer side surface of the side plates and used for reflecting part of the light of the lamp beads 32, the first reflector 33 is arranged above each lamp bead 32 in the peripheral area of the lamp bead array, and the first scattering parts 35 are arranged around the lamp beads 32;
the second reflector 34 comprises a second light transmission opening opposite to the light emitting surface of the lamp bead 32 and used for transmitting part of light rays of the lamp bead 32, side plates arranged on two sides of the second light transmission opening and an outer reflecting surface arranged on the outer side surface of each side plate and used for reflecting part of light rays of the lamp bead 32, the second reflector 34 is arranged on each row of lamp beads 32 in the middle area of the lamp bead array, the second scattering component 36 corresponds to each row of lamp beads 32 and is alternately arranged, and the extending direction of the second reflector 36 is the same as that of the second scattering component 36.
Wherein the first light transmission opening corresponds to the central region of the corresponding lamp bead 32 and the second light transmission opening corresponds to the central region of the corresponding lamp bead 32.
This embodiment sets up first reflector 33 in the regional all around of lamp pearl array to improve regional luminance all around of backlight, and then improve the luminous homogeneity of whole backlight.
The principle of operation of this third preferred embodiment is the same as or similar to that of the second preferred embodiment.
Compared with the direct type LED backlight source in the prior art, the direct type LED backlight source has the advantages that through the arrangement of the light transmitting opening, the outer reflecting surface and the scattering component of the reflector, light with a small emergent angle of lamp beads is transmitted through the light transmitting opening, light with a large angle is reflected on the scattering component after being reflected by the outer reflecting surface, is mixed with light with a small angle after being scattered by the scattering component and is projected to the double-sided prism diffusion plate, and finally, light is uniformly emitted under the diffusion effect of the double-sided prism diffusion plate; the technical problems that the existing direct type LED backlight source is poor in light mixing effect and long in light mixing distance on the premise that the quantity of lamp beads is not increased are solved.
Although the disclosure has been shown and described with respect to one or more implementations, equivalent alterations and modifications will occur to others skilled in the art based upon a reading and understanding of this specification and the annexed drawings. The present disclosure includes all such modifications and alterations, and is limited only by the scope of the appended claims. In addition, while a particular feature of the disclosure may have been disclosed with respect to only one of several implementations, such feature may be combined with one or more other features of the other implementations as may be desired and advantageous for a given or particular application. Furthermore, to the extent that the terms "includes," has, "" contains, "or variants thereof are used in either the detailed description or the claims, such terms are intended to be inclusive in a manner similar to the term" comprising.
In summary, although the present invention has been disclosed in the foregoing embodiments, the serial numbers before the embodiments, such as "first" and "second", are used for convenience of description only, and do not limit the sequence of the embodiments of the present invention. Furthermore, the above embodiments are not intended to limit the present invention, and those skilled in the art can make various changes and modifications without departing from the spirit and scope of the present invention, therefore, the scope of the present invention shall be limited by the appended claims.
Claims (9)
1. A direct type LED backlight source is characterized by comprising:
a back plate, a back plate and a back plate,
the lamp beads are arranged in a matrix form to form a lamp bead array and are arranged on the back plate;
the reflector is arranged above one end of the light emitting surface of the lamp bead and used for reflecting part of light rays of the lamp bead to the scattering component;
the scattering component is arranged on the outer side of the lamp bead and used for scattering the light rays reflected by the reflector and radiating the light rays to the double-sided prism diffusion plate;
the double-sided prism diffusion plate is arranged above the reflector and used for performing scattering treatment on the light scattered by the scattering component and the light transmitted by the lamp beads through the reflector and emitting the light;
the reflector comprises a light transmitting opening which is used for transmitting part of lamp bead light rays and right faces the light emitting surface of the lamp bead, a side plate which is arranged on the peripheral side of the light transmitting opening and an outer reflecting surface which is arranged on the outer side surface of the side plate and used for reflecting part of the lamp bead light rays.
2. The direct type LED backlight source of claim 1, wherein the side plates comprise first side plates disposed at two sides of the light-transmitting opening and provided with the external reflection surfaces, the reflector is disposed on each row of the beads, the scattering members are disposed alternately with each row of the beads, and an extending direction of the reflector is the same as an extending direction of the scattering members.
3. The direct type LED backlight source of claim 2, wherein the light-transmitting openings correspond to a central region of the beads.
4. The direct type LED backlight source of claim 1, wherein the side plates are located around the light-transmitting opening, the reflector is disposed above each of the beads, and the scattering members are correspondingly disposed around the beads.
5. The direct type LED backlight source of claim 4, wherein the light-transmitting openings correspond to a central region of the beads.
6. The direct type LED backlight source of claim 1, wherein the reflectors are divided into a first reflector corresponding to a peripheral region of the array of beads and a second reflector corresponding to a central region of the array of beads, and the scattering members are divided into a first scattering member corresponding to the first reflector and a second scattering member corresponding to the second reflector;
the first reflector comprises a first light transmitting opening which is opposite to the light emitting surface of the lamp beads and used for transmitting part of light rays of the lamp beads, side plates which are arranged around the first light transmitting opening in a surrounding mode, and an outer reflecting surface which is arranged on the outer side surface of each side plate and used for reflecting part of light rays of the lamp beads, the first reflector is arranged above each lamp bead, and the first scattering parts are arranged around the lamp beads;
the second reflector includes just right the lamp pearl light emitting area be used for seeing through the second printing opacity mouth of part lamp pearl light, set up and be in the curb plate of second printing opacity mouth both sides and setting are in the outer plane of reflecting that is used for reflecting part lamp pearl light of curb plate lateral surface, the second reflector sets up at every row on the lamp pearl, what the second scattering component corresponds with every row the lamp pearl sets up in turn, the extending direction of second reflector with the extending direction of second scattering component is the same.
7. A direct type LED backlight source as claimed in any one of claims 1 to 6, wherein the inner side of the side plate is provided with an inner reflecting surface.
8. The direct type LED backlight source according to any one of claims 1 to 6, wherein an included angle between a plane where the outer reflecting surface is located and a light-emitting surface of the lamp bead is 30-60 °.
9. The direct type LED backlight source according to any one of claims 1 to 6, wherein the outer reflecting surface is a plane or a convex curved surface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810906325.4A CN109085719B (en) | 2018-08-10 | 2018-08-10 | Direct type LED backlight source |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810906325.4A CN109085719B (en) | 2018-08-10 | 2018-08-10 | Direct type LED backlight source |
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| Publication Number | Publication Date |
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| CN109085719A CN109085719A (en) | 2018-12-25 |
| CN109085719B true CN109085719B (en) | 2021-03-16 |
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| CN201810906325.4A Active CN109085719B (en) | 2018-08-10 | 2018-08-10 | Direct type LED backlight source |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109799645B (en) * | 2019-03-15 | 2022-05-31 | 惠州市华星光电技术有限公司 | Backlight module and display device |
| CN109932841A (en) * | 2019-04-03 | 2019-06-25 | 靖江市永盛光电科技有限公司 | A kind of direct-light-type backlight with optically focused bracket |
| CN113192997B (en) * | 2021-04-28 | 2022-10-04 | 武汉华星光电技术有限公司 | Backlight module and display device |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007241272A (en) * | 2006-03-06 | 2007-09-20 | Exploit Technology Co Ltd | Light diffusion film |
| CN201739899U (en) * | 2010-02-23 | 2011-02-09 | 金芃 | Direct type thin LED backlight module |
| CN201795430U (en) * | 2009-12-27 | 2011-04-13 | 金芃 | Bottom lighting light guide plate of LED backlight module |
| WO2012009506A2 (en) * | 2010-07-15 | 2012-01-19 | American Panel Corporation | Shaped reflectors for enhanced optical diffusion in backlight assemblies |
| CN202209593U (en) * | 2011-09-08 | 2012-05-02 | 深圳市华星光电技术有限公司 | LED backlight module set and liquid crystal display device |
| CN206429949U (en) * | 2016-12-22 | 2017-08-22 | 青岛骐骥光电科技有限公司 | A kind of multi-sheet printed optical sheet |
-
2018
- 2018-08-10 CN CN201810906325.4A patent/CN109085719B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007241272A (en) * | 2006-03-06 | 2007-09-20 | Exploit Technology Co Ltd | Light diffusion film |
| CN201795430U (en) * | 2009-12-27 | 2011-04-13 | 金芃 | Bottom lighting light guide plate of LED backlight module |
| CN201739899U (en) * | 2010-02-23 | 2011-02-09 | 金芃 | Direct type thin LED backlight module |
| WO2012009506A2 (en) * | 2010-07-15 | 2012-01-19 | American Panel Corporation | Shaped reflectors for enhanced optical diffusion in backlight assemblies |
| CN202209593U (en) * | 2011-09-08 | 2012-05-02 | 深圳市华星光电技术有限公司 | LED backlight module set and liquid crystal display device |
| CN206429949U (en) * | 2016-12-22 | 2017-08-22 | 青岛骐骥光电科技有限公司 | A kind of multi-sheet printed optical sheet |
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| CN109085719A (en) | 2018-12-25 |
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