CN210896296U - Direct type backlight module - Google Patents
Direct type backlight module Download PDFInfo
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- CN210896296U CN210896296U CN201921657792.4U CN201921657792U CN210896296U CN 210896296 U CN210896296 U CN 210896296U CN 201921657792 U CN201921657792 U CN 201921657792U CN 210896296 U CN210896296 U CN 210896296U
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- backlight module
- direct type
- type backlight
- diffuse reflection
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Abstract
A direct type backlight module comprises a shell, a separation frame and a plurality of light bars. The shell comprises a shell and a planar diffuse reflection plate, the planar diffuse reflection plate is covered on the shell, the planar diffuse reflection plate and the inner wall of the shell jointly enclose an accommodating cavity, a plurality of positioning parts are arranged on the outer wall of the shell, each positioning part comprises a limiting groove and a plurality of avoiding holes, the separation frame is arranged in the accommodating cavity, a plurality of separation cavities are arranged on the separation frame, and the avoiding holes are covered on the separation cavities; the lamp strip includes base plate and a plurality of lamp pearl, and the lamp strip dress is in location portion, and lamp strip stiff end is located the outer wall of shell promptly, reduces and maintains the degree of difficulty. The base plate of lamp strip and the inner wall contact of spacing groove, the heat accessible spacing inslot wall loss that produces when the lamp pearl is luminous. Because of the lamp strip is external, the degree of depth in the holding cavity can reduce, and then makes whole backlight unit's thickness reduce. The base plate of lamp strip is shifted outside the holding chamber, has improved the effective reflection area in the holding chamber, need not coat white oil on the base plate, reduces the cost of manufacture of lamp strip.
Description
Technical Field
The utility model relates to a backlight module, especially relate to a straight following formula backlight unit.
Background
In the current direct type backlight, adjacent LEDs are optically mixed with each other to generate a backlight with uniform brightness, but the architecture is troublesome for 3D implementation of localization (i.e., area brightness control) and scanning mode (scanning type). Since the brightness between adjacent LEDs can affect each other, the brightness of the whole area cannot be precisely controlled only by turning off or turning on the LEDs in the target area, and moreover, since the brightness area generated by a single LED is circular, it is not favorable for the realization of 3d scanning which requires rectangular partitioning and line scanning.
The direct type module scheme common in the market is a built-in scheme of an LED lamp bar, namely the LED lamp bar is placed in a backlight cavity of the module, and the scheme has the following defects:
1. the LED light bar is internally arranged, so that the LED is difficult to radiate heat;
2. when the LED lamp strip is in failure and needs to be reworked or replaced, the whole backlight module needs to be disassembled and then taken out;
3. in order to prevent the problem of the overall brightness reduction of the backlight module caused by the light absorption of the surface of the LED light bar, white oil (high-reflectivity ink) needs to be brushed on the surface of the light bar, so that the product cost is high.
Therefore, how to optimize the direct type backlight module, the illumination of each subarea in the backlight module can not be interfered with each other, the manufacturing cost of the direct type backlight module is reduced, the heat dissipation effect of the lamp strip in the direct type backlight module is improved, the maintenance difficulty is reduced, and the problem needs to be solved by technical personnel in the field.
SUMMERY OF THE UTILITY MODEL
The utility model aims to overcome the defects in the prior art and provide a direct type backlight module,
the purpose of the utility model is realized through the following technical scheme:
a direct type backlight module includes: the lamp comprises a shell, a separation frame and a plurality of lamp strips;
the shell comprises a shell body and a plane diffuse reflection plate, the plane diffuse reflection plate is covered on the shell body, the plane diffuse reflection plate and the inner wall of the shell body jointly enclose an accommodating cavity, a plurality of positioning parts are arranged on the outer wall of the shell body, and intervals are arranged among the positioning parts;
in one of the positioning parts, the positioning part comprises a limiting groove and a plurality of avoiding holes, the limiting groove is positioned on the side surface of the shell far away from the planar diffuse reflection plate, the plurality of avoiding holes are positioned on the bottom surface of the limiting groove, and the plurality of avoiding holes are communicated with the accommodating cavity;
the separation frame is arranged in the containing cavity, a plurality of separation cavities are arranged on the separation frame, and a plurality of the separation cavities are covered with a plurality of the avoiding holes in a one-to-one correspondence manner;
each lamp strip all includes base plate and a plurality of lamp pearl, and is a plurality of the lamp pearl all install in on the base plate, each the base plate corresponds the embedding in one the spacing inslot, and is a plurality of the lamp pearl one-to-one wears to establish a plurality of keep away the position hole.
In one embodiment, the separation frame abuts against the planar diffuse reflection plate.
In one embodiment, a space is provided between the separation frame and the planar diffuse reflection plate.
In one embodiment, the distance between the end face of the separation frame and the planar diffuse reflection plate is 2 mm-5 mm.
In one embodiment, the partition frame comprises a plurality of reflecting retaining walls, and the reflecting retaining walls are arranged on the inner wall of the shell at intervals.
In one embodiment, a specular reflection layer is disposed on an outer wall of each of the reflective retaining walls.
In one embodiment, a partition is arranged between every two adjacent reflecting retaining walls.
In one embodiment, the height of the partition is less than that of the reflective wall.
In one embodiment, the thickness of the partition wall is equal to that of the reflective retaining wall.
In one embodiment, the substrate comprises a bearing plate and a PCB, the bearing plate is covered with the limiting groove, the PCB is mounted on the bearing plate, and the plurality of lamp beads are arranged on the PCB at intervals.
Compared with the prior art, the utility model discloses at least, following advantage has:
1. the lamp strip dress is in location portion, and lamp strip stiff end is located the outer wall of shell promptly, can follow the outside when maintaining and load and unload one of them lamp strip, reduces and maintains the degree of difficulty.
2. The base plate of lamp strip and the inner wall contact of spacing groove, the heat accessible spacing inslot wall loss that produces when the lamp pearl is luminous.
3. Because of the lamp strip is external, the degree of depth in the holding cavity can reduce, and then makes whole backlight unit's thickness reduce.
4. Because of the lamp strip is external, the base plate of lamp strip is shifted outside the holding chamber, has improved the effective reflection area in the holding chamber, need not coat white oil on the base plate, reduces the cost of manufacture of lamp strip.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention, and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.
Fig. 1 is an exploded view of a direct type backlight module according to an embodiment of the present invention;
fig. 2 is a schematic view of an internal structure of a direct-type backlight module according to an embodiment of the present invention.
Detailed Description
In order to facilitate understanding of the present invention, the present invention will be described more fully hereinafter with reference to the accompanying drawings. The preferred embodiments of the present invention are shown in the drawings. The invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.
It will be understood that when an element is referred to as being "secured to" 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," "left," "right," and the like as used herein are for illustrative purposes only and do not represent the only embodiments.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.
Referring to fig. 1, a direct type backlight module 10 includes: the lamp comprises a housing 100, a separation frame 200 and a plurality of lamp strips 300. Separate frame 200 and set up in shell 100, a plurality of lamp strips 300 are installed on the outer wall of shell 100, and lamp pearl on the lamp strip 300 stretches into in the shell 100, with the fixed position of lamp strip 300 by shell 100 internal transfer to shell 100 outer wall department, effective reflection of light area in the shell 100 has been improved, need not carry out the brushing oil processing to the lamp strip, backlight unit's cost of manufacture has been reduced, and be convenient for the later stage maintain the operation, the position of generating heat of lamp strip 300 contacts with shell 100, can in time dispel the heat, separate frame 200 is used for separating the illumination area of each lamp strip 300, avoid the light that each lamp strip 300 sent out to mutually interfere.
Referring to fig. 2, the housing 100 includes a casing 110 and a planar diffuse reflection plate 120, the casing 110 is a box-shaped structure with a single side opened, the planar diffuse reflection plate 120 is covered on the casing 110, that is, the planar diffuse reflection plate 120 seals the opening on the casing 110, the planar diffuse reflection plate 120 and an inner wall of the casing 110 together enclose an accommodating cavity, a plurality of positioning portions 130 are disposed on an outer wall of the casing 110, and a space is disposed between the plurality of positioning portions 130. The positioning portion 130 is located on the side surface of the outer wall of the housing 110 away from the planar reflection plate 120, the light bar 300 is fixed in the positioning portion 130, and the fixing position of the light bar 300 is transferred from the inside of the housing 110 to the outside of the housing through the fixing portion 130.
Specifically, referring to fig. 1 and fig. 2, in one of the positioning portions 130, the positioning portion 130 includes a limiting groove 131 and a plurality of avoiding holes 132, the limiting groove 131 is located on a side surface of the casing 110 away from the planar diffuse reflection plate 120, the plurality of avoiding holes 132 are located on a bottom surface of the limiting groove 131, and the plurality of avoiding holes 132 are all communicated with the accommodating cavity; spacing groove 131 is used for holding the lamp strip, and is located spacing groove 131 subaerial aversion hole 132 then is used for communicateing spacing groove 131 and holding chamber respectively, so, after lamp strip 300 installed spacing groove 131 inside, lamp pearl 320 on the lamp strip 300 can pass and keep away the hole and stretch into the holding intracavity portion, through set up location portion 130 on casing 110 outer wall, realizes the transfer of lamp strip 300 mounted position.
After the light bar 300 is arranged outside, the shell 100 does not need to be disassembled in the maintenance process, and the light bar 300 which needs to be replaced or maintained can be directly and independently disassembled from the outer wall of the shell 100, so that the necessary assembling and disassembling steps of an operator during maintenance are reduced, and the maintenance efficiency is improved.
It should be noted that, referring to fig. 2, a light bar 300 is disposed in each positioning portion 130, so that partitioning of the backplane module is achieved, that is, each light bar 300 is a lighting partition, when each light bar 300 is powered on, light is emitted to light a corresponding area on the planar diffuse reflection plate 120, in order to achieve independent control of brightness of each partition, the partition frame 200 is disposed in the accommodating cavity, and the partition frame 200 is provided with a plurality of partition cavities 210, and the plurality of partition cavities 210 are covered with a plurality of avoiding holes 132 in a one-to-one correspondence manner, so that after the plurality of light bars 300 are mounted on the outer wall of the casing 110, the plurality of partition cavities 210 are faced one-to-one correspondence manner, that is, when each light bar 300 is lighted, the emitted light is limited in one partition cavity 210 that the light bar 300 faces, and the light bar 300 is prevented from being emitted into the lighting area.
Specifically, referring to fig. 1 and 2, each light bar 300 includes a substrate 310 and a plurality of light beads 320, the plurality of light beads 320 are installed on the substrate 310, each substrate 310 is correspondingly embedded in one limiting groove 131, and the plurality of light beads 320 correspondingly penetrate through the plurality of avoiding holes 132 one by one. That is to say, a plurality of lamp beads 320 pass and keep away the position hole 132 and enter into the holding intracavity and be located one and separate the intracavity portion that corresponds with it, and when lamp bead 320 on this lamp strip 300 was lighted like this, its light of launching can receive the outer wall separation that separates the chamber 210, ensures that the light that each lamp bead 320 launches can not cross the border.
It should be noted that when a single lamp bead 320 is turned on, the light emitted therefrom is diffused all around, the lighted area is circular, and the brightness of the lighted area gradually weakens from the central area to the edge, so when the light bar 300 is powered on, which illuminates the corresponding area of the planar diffuse reflection plate 120 while part of the light is radiated to the adjacent subareas, and also causes uneven lighting on the planar diffuse reflection plate 120, the compartment 210 can limit the light emitted by the light bar 300 therein when the light bar is powered on, so that the light emitted by each light bead 320 is always reflected in the compartment 210, but not enter into the adjacent separate cavities, thereby well avoiding the phenomenon that other separate cavities simultaneously emit light in the process of lighting, meanwhile, since the light is not radiated to other areas, the light is concentrated in the range defined by the cell 210, and the light emitted by the planar diffuse reflection plate 120 is more uniform.
In one embodiment, to improve the light-blocking effect of the separation frame 200, the separation frame 200 is abutted against the planar diffuse reflection plate 120. In yet another embodiment, a space is provided between the separation frame 200 and the planar diffuse reflection plate 120. Specifically, the distance between the end surface of the partition frame 200 and the planar diffuse reflection plate 120 is 2mm to 5 mm.
Referring to fig. 1, the partition frame 200 includes a plurality of reflective walls 211, and the reflective walls 211 are disposed on the inner wall of the housing 110 at intervals. That is, the compartment 210 is formed by the reflective walls 211 and the inner wall of the accommodating cavity, and in order to improve the reflection effect of the compartment frame 200, a specular reflection layer is disposed on the outer wall of each reflective wall 211.
In order to improve the structural strength of the partition frame 200, a partition 212 is disposed between every two adjacent reflective walls 211. The height of the partition 212 is less than that of the reflective retaining wall 211. The thickness of the partition 212 is equal to that of the reflective retaining wall 211.
The substrate 310 includes a supporting plate 311 and a PCB circuit board 312, the supporting plate 311 covers the limiting groove 131, the PCB circuit board 312 is installed on the supporting plate 311, and the plurality of lamp beads 320 are disposed on the PCB circuit board 312 at intervals. Each PCB circuit board 312 is electrically connected with an external circuit, the PCB circuit boards 312 are powered by the external circuit to light the lamp beads 320, the bearing plate 311 is located at the outer side, i.e., on the side away from the accommodating cavity, and the bearing plate 311 is used for supporting the PCB circuit boards 312 and sealing the limiting groove 131.
Compared with the prior art, the utility model discloses at least, following advantage has:
1. the light bars 300 are arranged in the positioning portion 130, that is, the fixed ends of the light bars 300 are located on the outer wall of the housing 100, so that one of the light bars 300 can be assembled and disassembled from the outside during maintenance, and the maintenance difficulty is reduced.
2. The base plate 310 of the lamp strip 300 is in contact with the inner wall of the limiting groove 131, and heat generated by the lamp beads 320 when the lamp beads emit light can be dissipated through the inner wall of the limiting groove 131.
3. Because the lamp strip 300 is external, the degree of depth in the holding chamber can reduce, and then makes whole backlight unit's thickness reduce.
4. Because the lamp strip 300 is external, the base plate 310 of the lamp strip 300 is transferred to the outside of the accommodating cavity, so that the effective reflection area in the accommodating cavity is increased, white oil does not need to be coated on the base plate 310, and the manufacturing cost of the lamp strip 300 is reduced.
The above-mentioned embodiments only represent some embodiments of the present invention, and the description thereof is specific and detailed, but not to be construed as limiting the scope of the present invention. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several variations and modifications can be made, which are within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.
Claims (10)
1. A direct type backlight module is characterized by comprising:
the casing comprises a casing body and a plane diffuse reflection plate, the plane diffuse reflection plate is covered on the casing body, the plane diffuse reflection plate and the inner wall of the casing body jointly enclose an accommodating cavity, a plurality of positioning parts are arranged on the outer wall of the casing body, and intervals are arranged among the positioning parts;
in one of the positioning parts, the positioning part comprises a limiting groove and a plurality of avoiding holes, the limiting groove is positioned on the side surface of the shell far away from the planar diffuse reflection plate, the plurality of avoiding holes are positioned on the bottom surface of the limiting groove, and the plurality of avoiding holes are communicated with the accommodating cavity;
the partition frame is arranged in the accommodating cavity, a plurality of partition cavities are arranged on the partition frame, and a plurality of position avoiding holes are covered on the plurality of partition cavities in a one-to-one correspondence manner;
the lamp strip comprises a substrate and a plurality of lamp beads, the lamp beads are installed on the substrate, each substrate is correspondingly embedded in one limiting groove, and the lamp beads penetrate through the position avoiding holes in a one-to-one correspondence mode.
2. The direct type backlight module according to claim 1, wherein the separation frame abuts against the planar diffuse reflection plate.
3. The direct type backlight module according to claim 1, wherein a space is provided between the separation frame and the planar diffuse reflection plate.
4. The direct type backlight module according to claim 2, wherein the distance between the end surface of the separation frame and the planar diffuse reflection plate is 2mm to 5 mm.
5. The direct type backlight module according to claim 1, wherein the frame comprises a plurality of reflective walls, and the reflective walls are spaced apart from each other on the inner wall of the housing.
6. The direct type backlight module as claimed in claim 5, wherein a specular reflection layer is disposed on the outer wall of each of the reflective walls.
7. The direct type backlight module as claimed in claim 5, wherein a partition is disposed between every two adjacent reflective walls.
8. The direct type backlight module as claimed in claim 7, wherein the height of the partition is less than the height of the reflective wall.
9. The direct type backlight module as claimed in claim 7, wherein the thickness of the partition is equal to the thickness of the reflective wall.
10. The direct type backlight module as claimed in claim 1, wherein the substrate comprises a supporting plate and a PCB, the supporting plate covers the position-limiting groove, the PCB is mounted on the supporting plate, and the plurality of beads are spaced on the PCB.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921657792.4U CN210896296U (en) | 2019-09-30 | 2019-09-30 | Direct type backlight module |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921657792.4U CN210896296U (en) | 2019-09-30 | 2019-09-30 | Direct type backlight module |
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| Publication Number | Publication Date |
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| CN210896296U true CN210896296U (en) | 2020-06-30 |
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| CN201921657792.4U Active CN210896296U (en) | 2019-09-30 | 2019-09-30 | Direct type backlight module |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111899657A (en) * | 2020-09-04 | 2020-11-06 | 广州沣雷交通科技股份有限公司 | Soft light LED information display module, display screen and display screen control system |
-
2019
- 2019-09-30 CN CN201921657792.4U patent/CN210896296U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111899657A (en) * | 2020-09-04 | 2020-11-06 | 广州沣雷交通科技股份有限公司 | Soft light LED information display module, display screen and display screen control system |
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