CN208060905U - A kind of direct-light type LED backlight module with round platform - Google Patents
A kind of direct-light type LED backlight module with round platform Download PDFInfo
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- CN208060905U CN208060905U CN201820584085.6U CN201820584085U CN208060905U CN 208060905 U CN208060905 U CN 208060905U CN 201820584085 U CN201820584085 U CN 201820584085U CN 208060905 U CN208060905 U CN 208060905U
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- round platform
- regular hexagon
- lighting unit
- led lamp
- circular cone
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Abstract
This application discloses a kind of direct-light type LED backlight module with round platform, round platform, circular cone, LED lamp bead and reflection partition board constitute regular hexagon lighting unit and incomplete lighting unit, the rectangular backlight module of these unit spliceds.LED lamp bead is placed on the side of round platform, different round platform inclination angles and basal diameter are set, to change the direction that LED lamp bead light intensity is greatly located, mixed light degree is improved, reduces mixed light height.The arrangement mode of regular hexagon reduces the arranging density of LED lamp bead, improves heat dissipation, reduces cost.The efficiency of light energy utilization and illuminance uniformity of lighting unit are greatly improved using circular cone.The application need not use optical lens, greatly save product cost, reduce design difficulty and shorten production life cycle.
Description
Technical field
This application involves field of liquid crystal display, in particular by the ultra-thin down straight aphototropism mode set of round platform and LED.
Background technology
Liquid crystal display（LCD）Including liquid crystal display panel and backlight module.Liquid crystal is passive light-emitting display device, it is often necessary to
Arrange that light source, liquid crystal display panel show the image of different brightness by controlling the transmitance of light at the liquid crystal back side.Backlight module
Containing more light sources and optical element in (Backlight module), backlight module provides uniform light for liquid crystal display panel,
Its luminescent properties will directly influence the display effect of LCD, include LED light source in usual backlight module.
According to the distributing position of light source in backlight module, backlight module has down straight aphototropism mode set and side entrance back module
Two kinds.Wherein, the light source of down straight aphototropism mode set is placed on the dead astern of liquid crystal display panel, is mounted on the bottom parallel with liquid crystal display panel
On plate, directly outgoing penetrates liquid crystal display panel to light forward.The light source of side entrance back module be placed on backlight module side and
The side rear of liquid crystal display panel, most of light to preceding injection and penetrate liquid crystal display panel after superrefraction, reflection.With side entrance back
Module is compared, and the brightness of down straight aphototropism mode set is high, uniformity is good, capacity usage ratio is high, simple in structure, colour gamut is wide, and straight
Type backlight module can carry out subregion regulation and control, improve display contrast, realize dynamic and intelligent backlight, thus direct-type backlight
The image quality of module is more preferable.
But there are disadvantages for down straight aphototropism mode set：For the uniformity requirement being up to state standards, liquid crystal display panel and light source
Between need certain light mixing distance, cause the thickness of backlight module and display larger, which has limited its development, when not meeting
Frivolous, the beautiful demand of lower people.For the thickness and light mixing distance for improving uniformity, reducing display, it is disclosed it is straight under
In formula LED back light model setting technologies, one kind is evenly spaced on bottom plate using large number of low-power LED, but densely arranged
LED heat can be caused to gather, heat dissipation is bad, and control circuit is complicated and cost increases.Another kind of is to use free-form surface lens
Ultrathin Uniform Illumination is realized in combination with great power LED, but lens design is complicated, production cost height and processing, assembling work
Skill is complicated, and luminous energy loss is more.
Present direct-light type LED backlight module has the following disadvantages：Module thickness is big, and LED lamp bead quantity is more, freely
Toroidal lens design is complicated, of high cost.
Invention content
To solve the above-mentioned problems, this application discloses a kind of direct-light type LED backlight module with round platform, including it is multiple
Round platform, multistage reflection partition board, LED lamp bead, circular cone, bottom plate, frame；The round platform, circular cone, reflection partition board all on bottom plate,
Backplate surface is reflecting surface；Each the angle between frustum cone side and bottom surface is 30 °, and each round platform upper bottom surface, side are
The radius of reflecting surface, the radius ratio bottom surface of round platform upper bottom surface is small, and six identical round platform central distributions are on one small positive six side
On each vertex of shape；Reflection partition board, which is trapped among around small regular hexagon, becomes a big regular hexagon；Big regular hexagon with it is small just
Hexagon is total to geometric center, and each side of two regular hexagons is parallel to each other；4 LED lamps are uniformly placed on the side of each round platform
The luminous component of pearl, 4 LED lamp beads is equal at a distance from round platform bottom surface, wherein there is two LED lamp beads to be located at big regular hexagon
On diagonal line；The circular cone is placed on big regular hexagon center, and surface is reflecting surface；Each big regular hexagon and big
Round platform, circular cone inside regular hexagon and LED lamp bead constitute a complete lighting unit, the reflection of adjacent illumination units shared every
Plate；In the edge of backlight there is incomplete lighting unit, each incomplete lighting unit to contain round platform；Bottom plate and side
Frame surrounds the boundary of backlight, and jamb surface is also reflecting surface.
Preferably, the bottom surface radius of the circular cone and the height of circular cone are equal.
Preferably, the big regular hexagon length of side a=m+L, wherein m are adjacent round platform center spacing, and L is that round platform is larger
Basal diameter.
Preferably, for the incomplete lighting unit there are two types of shape, the first incomplete lighting unit is isosceles
Trapezoidal, isosceles trapezoid is the half of big regular hexagon, includes 3 round platforms and 1 circular cone, two of which round platform point in isosceles trapezoid
Not Wei Yu trapezoidal waist perpendicular bisector and trapezoidal base angle angular bisector point of intersection；Another round platform, which is located in trapezoidal bottom edge, to hang down
On line, and it is the trapezoidal shorter bottom edge length of side with a distance from trapezoidal shorter bottom edgeTimes, the circular cone bottom surface center of circle also is located at ladder
On the perpendicular bisector on shape bottom edge；Second of incomplete lighting unit is pentagon, and pentagon cuts off an angle institute for regular hexagon
, including at least three round platform and 1 circular cone.
Light intensity at the axis of usual LED is maximum, light substantial symmetry distribution centered on axis of LED, in tradition
Down straight aphototropism mode set technical solution in make the axis of LED perpendicular to liquid crystal display panel, thus the light intensity obtained on liquid crystal display panel
It is uneven, it needs using various optical textures come even light, and also increase light mixing distance, LED lamp bead is placed on circle by the application
On the side of platform, the axis of LED is made, at 60 ° of angles, to have adjusted the direction that LED chip light intensity is greatly located with liquid crystal display panel, reduce
Even smooth difficulty makes light redistribute, improves the efficiency of light energy utilization and illumination is equal by structures such as round platform, circular cone, reflection partition boards
Even property, reduces light mixing distance.It is compared with well known technical solution, the application reduces the thickness of liquid crystal display, and is not required to
Optical lens is used, cost is reduced, reduces processing and installation difficulty.
Description of the drawings
The application is further illustrated with reference to the accompanying drawings and examples.Attached drawing is used for providing the further reason to the application
Solution, is used together to explain the application with embodiments herein, does not constitute the limitation to the application.
Fig. 1 is frustum cone structure schematic diagram.
Fig. 2 is regular hexagon lighting unit schematic diagram.
Fig. 3 is the imperfect lighting unit schematic diagram of isosceles trapezoid.
Fig. 4 is the imperfect lighting unit schematic diagram of pentagon.
Fig. 5 is backlight module overall schematic.
Fig. 6 is the illumination figure of 4 LED that are distributed in embodiment on round platform on diffuser plate.
Fig. 7 is illumination figure of the regular hexagon lighting unit on diffuser plate in embodiment.
Fig. 8 is illumination figure of the imperfect lighting unit of isosceles trapezoid on diffuser plate in embodiment.
Fig. 9 is illumination figure of the imperfect lighting unit of pentagon on diffuser plate in embodiment.
Figure 10 is the whole illumination figure on diffuser plate of backlight module in embodiment.
In figure：1. round platform, 2.LED lamp beads, 3. diffuser plates, 4. reflection partition boards, 5. circular cones, 6. frames, 7. bottom plates.
Specific implementation mode
The application is described in further detail below in conjunction with attached drawing：A kind of direct-light type LED backlight with round platform
Module, including multiple round platforms, multistage reflection partition board, LED lamp bead, circular cone, bottom plate, frame.
The size of the round platform used in embodiment for：Basal diameter L is 17.32mm, and inclination angle is 30 °, and side at least can
Place LED lamp bead, such as Fig. 1；Due to the size of careful design round platform, LED lamp bead is placed on frustum cone side, is changed
Central light strength greatly locates the exit direction of light, and this way makes illumination spot area increase, and mixed light degree improves, to drop
Low light mixing distance, reduces the thickness of liquid crystal display.
The LED lamp bead used in the present embodiment produces for CREE companies, model XLamp XQ-A, and bed-plate dimension is
1.61.6mm, single led luminous flux are 89 lm.Uniformly place 4 LED lamp beads on the side of each round platform, 4
The luminous component of LED is equal at a distance from round platform bottom surface, wherein there is two LED lamp beads to be located on the diagonal line of big regular hexagon；
The position that each round platform puts 4 LED lamp beads and LED lamp bead is to meet illumination and illumination is equal by testing gained repeatedly
Under conditions of even property, the quantity of LED lamp bead is reduced, heat dissipation effect is improved, reduces cost, reduces processing, installation difficulty.
4 LED lamp beads and a round platform form a whole in embodiment, are considered as single analog light source, illumination is such as
Shown in Fig. 6.Light reaches liquid crystal display panel by diffuser plate in the present embodiment, does not use diffuser plate, light in another embodiment
Line directly reaches liquid crystal display panel.
Round platform, circular cone, reflection partition board in embodiment is all on bottom plate, and backplate surface is reflecting surface, and backplate surface can
The some light that LED is sent out is reflected into diffuser plate, light is directly reflected into liquid crystal display panel in the case of no diffuser plate
On, it improves the efficiency of light energy utilization, improve illuminance uniformity.
Each angle between frustum cone side and bottom surface is 30 °, it is ensured that most of light that LED is sent out need not be through
Bottom plate reflection can reach diffuser plate, reduce energy loss.
Each round platform upper bottom surface, side reflection light, the radius of the radius ratio bottom surface of round platform upper bottom surface is small, six phases
Same round platform central distribution is on each vertex of a small regular hexagon；Upper bottom surface and side energy will be from diffuser plate or liquid crystal surfaces
The light reflection that the reflected light of plate, LED lamp bead are sent out, this structure is easily worked, at low cost, and improves luminous energy
Utilization rate, mixed light degree, improve illuminance uniformity.
The arrangement mode of regular hexagon is by testing gained repeatedly, comparing other shapes, the arrangement mode of regular hexagon
The arranging density for reducing LED lamp bead improves heat dissipation, reduces cost.The adjacent round platform of small regular hexagon in the present embodiment
Center spacing m=26mm is less than the size of most of liquid crystal display panel, and multiple regular hexagon illuminations can be placed in backlight module
Unit.
Reflection partition board, which is trapped among around small regular hexagon, becomes a big regular hexagon；Big regular hexagon and small regular hexagon are total
Geometric center, each side of two regular hexagons are parallel to each other；The shape and position that reflection partition board surrounds are by testing gained repeatedly, really
It is all very good illumination and illuminance uniformity have been protected.
Big regular hexagon length of side a=m+L in embodiment, wherein m are adjacent round platform center spacing, and L is the larger bottom of round platform
Face diameter.Big regular hexagon length of side a=43.32mm in the present embodiment.The length of side of big regular hexagon be through testing gained repeatedly,
It ensure that illuminance uniformity is fine in each big regular hexagon.
The arrangement mode of round platform ensure that each angle of big regular hexagon nearby there are one round platform, has one on each round platform
This angle of LED lamp bead face, it is this to design the technique effect that will produce, it is ensured that each angle of reflection partition board has sufficient
Light irradiates, and it is weaker and illumination is caused to decline to avoid edge direct line, to improve the illumination at the liquid crystal display panel back side
Uniformity.
The bottom surface radius of circular cone and the height of circular cone are equal in embodiment, and circular cone is placed on big regular hexagon center,
Surface is reflecting surface；Conical surface is curved surface, light can be reflected to all directions, near center location is enable to receive more
Light, illumination increase, to improve the uniformity at the liquid crystal display panel back side, compared with the mode for using lens, in backlight module
It is middle to reduce difficulty of processing and cost using circular cone.Conical bottom radius surface and cone height are 10mm in embodiment.
Round platform, circular cone and LED lamp bead inside each big regular hexagon and big regular hexagon constitute a complete photograph
Bright unit, Illumination Distribution are as shown in Figure 7.Adjacent illumination units shared reflects partition board；Have in the edge of backlight endless
Whole lighting unit, each incomplete lighting unit contain round platform；Only lean on regular hexagon that can not splice rectangular, in edge
There are notch, rectangle is collectively formed with regular hexagon lighting unit in incomplete lighting unit, easy to process, can easily match
Liquid crystal display panel is closed, without alternatively improved.By changing the length of side of regular hexagon lighting unit and splicing multiple lighting unit energy
Enough adapt to the liquid crystal display panel of all mainstreams.
For incomplete lighting unit there are two types of shape, the first incomplete lighting unit is isosceles trapezoid in embodiment,
Isosceles trapezoid is the half of big regular hexagon, includes 3 round platforms and 1 circular cone in isosceles trapezoid, and two of which round platform distinguishes position
In the point of intersection of the angular bisector of the perpendicular bisector and trapezoidal base angle of trapezoidal waist, as shown in Figure 3；In incomplete lighting unit,
If arrangement mode setting round platform, the circular cone according to regular hexagon cannot achieve the effect that Uniform Illumination, illuminance uniformity is low,
Therefore the arrangement position that change round platform is needed in incomplete lighting unit, can be only achieved required illumination and illuminance uniformity
It is required that；Round platform is placed on to the point of intersection of the perpendicular bisector of trapezoidal waist and the angular bisector at trapezoidal base angle, both ensure that two base angles had and filled
The light of foot, and make the distance of round platform to base angle both sides equal, illumination is also close, another round platform is located in trapezoidal bottom edge
On vertical line, and it is the trapezoidal shorter bottom edge length of side with a distance from trapezoidal shorter bottom edgeTimes, the circular cone bottom surface center of circle also position
In on the perpendicular bisector on trapezoidal bottom edge.In isosceles trapezoid, this arrangement mode improves illuminance uniformity, illumination figure such as Fig. 8
Shown, brightness value and illuminance uniformity are suitable with regular hexagon lighting unit, ensure that the illuminance uniformity of entire backlight module
Preferably.
Second of incomplete lighting unit is pentagon, and pentagon is that regular hexagon is cut off obtained by an angle, including extremely
Few 3 round platforms and 1 circular cone, as shown in Figure 4；Due to having cut off an angle, reduce a round platform, cause circular cone to long side it
Between perpendicular bisector neighbouring position illumination decline, reduce illuminance uniformity；Therefore two circles of long side be will be close in embodiment
Platform moves 4mm to perpendicular bisector, is declined with making up illumination caused by intermediate rays are reduced, improves uniformity, illumination figure such as Fig. 9
Shown, brightness value and illuminance uniformity are suitable with regular hexagon lighting unit, ensure that the illuminance uniformity of entire backlight module
Preferably.
Bottom plate and frame surround the boundary of backlight, and jamb surface is also reflecting surface.Jamb surface reflection light, by LED
The some light sent out is reflected into diffuser plate, is directly reflected on liquid crystal display panel light in the case of no diffuser plate, carries
High-light-energy utilization rate improves illuminance uniformity.
In order to reach good display effect, not only need to ensure that illuminance uniformity reaches requirement at the liquid crystal display panel back side,
The radiation direction of point also each to the liquid crystal display panel back side is limited.It is required that angle of incident light minute is each put at the liquid crystal display panel back side
Cloth situation is almost the same, and light, through after liquid crystal display, user watches pure color picture from different location（Complete white picture or complete
Black picture or complete red picture or complete green picture or complete blue picture）When, eye of the light of every bit transmission into access customer on liquid crystal display
Intensity is roughly equal after eyeball, and the brightness for the screen each point that such user sees is consistent.In technical solution provided by the present application due to
The lighting unit for using various shapes is provided with round platform, circular cone, tilted-putted LED lamp bead in these units, and limits
Portion size, this composite structure not only can guarantee that the illuminance uniformity at the liquid crystal display panel back side reaches requirement, moreover it is possible to ensure liquid
It is almost the same that crystal face back each puts angle of incident light distribution situation, and after light penetrates liquid crystal display, user is from different positions
When setting viewing pure color picture, the brightness uniformity that human eye can experience screen is preferable.
The principles and effects of the application are only illustrated in above-described embodiment, but the protection domain of the application does not limit to
In this, any one skilled in the art in the technical scope that the application discloses, the variation that can readily occur in or
It replaces, should all cover within the protection domain of the application.
Claims (4)
1. a kind of direct-light type LED backlight module with round platform, it is characterized in that：Including multiple round platforms, multistage reflection partition board, LED
Lamp bead, circular cone, bottom plate, frame；All on bottom plate, backplate surface is reflecting surface for the round platform, circular cone, reflection partition board；Each
Angle between frustum cone side and bottom surface is 30 °, and each round platform upper bottom surface, side are reflectings surface, the half of round platform upper bottom surface
Diameter is smaller than the radius of bottom surface, and six identical round platform central distributions are on each vertex of a small regular hexagon；Reflection every
Plate, which is trapped among around small regular hexagon, becomes a big regular hexagon；Big regular hexagon is total to geometric center with small regular hexagon, and two just
Each side of hexagon is parallel to each other；4 LED lamp beads are uniformly placed on the side of each round platform, 4 LED lamp beads shine
Part is equal at a distance from round platform bottom surface, wherein there is two LED lamp beads to be located on the diagonal line of big regular hexagon；The circle
Cone is placed on big regular hexagon center, and surface is reflecting surface；Circle inside each big regular hexagon and big regular hexagon
Platform, circular cone and LED lamp beads constitute a complete lighting unit, and adjacent illumination units shared reflects partition board；On the side of backlight
There is incomplete lighting unit, each incomplete lighting unit to contain round platform at edge；Bottom plate and frame surround backlight
Boundary, jamb surface are also reflecting surface.
2. according to a kind of direct-light type LED backlight module with round platform described in claim 1, it is characterized in that：The circle
The bottom surface radius of cone and the height of circular cone are equal.
3. according to a kind of direct-light type LED backlight module with round platform described in claim 1, it is characterized in that：Described is big
Regular hexagon length of side a=m+L, wherein m are adjacent round platform center spacing, and L is the larger basal diameter of round platform.
4. according to a kind of direct-light type LED backlight module with round platform described in claim 1, it is characterized in that：It is described not
For complete lighting unit there are two types of shape, the first incomplete lighting unit is isosceles trapezoid, and isosceles trapezoid is big positive six side
The half of shape, includes 3 round platforms and 1 circular cone in isosceles trapezoid, two of which round platform be located at trapezoidal waist perpendicular bisector and
The point of intersection of the angular bisector at trapezoidal base angle；Another round platform is located on the perpendicular bisector on trapezoidal bottom edge, and from trapezoidal shorter bottom
The distance on side is the trapezoidal shorter bottom edge length of sideTimes, the circular cone bottom surface center of circle also is located on the perpendicular bisector on trapezoidal bottom edge；Second
The incomplete lighting unit of kind is pentagon, and pentagon is that regular hexagon is cut off obtained by an angle, including at least three round platform and 1
A circular cone.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820584085.6U CN208060905U (en) | 2018-04-24 | 2018-04-24 | A kind of direct-light type LED backlight module with round platform |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201820584085.6U CN208060905U (en) | 2018-04-24 | 2018-04-24 | A kind of direct-light type LED backlight module with round platform |
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| CN201820584085.6U Withdrawn - After Issue CN208060905U (en) | 2018-04-24 | 2018-04-24 | A kind of direct-light type LED backlight module with round platform |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108563068A (en) * | 2018-04-24 | 2018-09-21 | 安徽师范大学 | A kind of ultra-thin down straight aphototropism mode set |
| CN110249843A (en) * | 2019-06-29 | 2019-09-20 | 华南理工大学 | A kind of plant cultivation frame of high evenness |
| CN113703224A (en) * | 2021-08-26 | 2021-11-26 | 安徽芯瑞达科技股份有限公司 | Four-wafer Mini LED backlight module |
-
2018
- 2018-04-24 CN CN201820584085.6U patent/CN208060905U/en not_active Withdrawn - After Issue
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108563068A (en) * | 2018-04-24 | 2018-09-21 | 安徽师范大学 | A kind of ultra-thin down straight aphototropism mode set |
| CN108563068B (en) * | 2018-04-24 | 2023-04-25 | 安徽师范大学 | Ultrathin direct type backlight module |
| CN110249843A (en) * | 2019-06-29 | 2019-09-20 | 华南理工大学 | A kind of plant cultivation frame of high evenness |
| CN113703224A (en) * | 2021-08-26 | 2021-11-26 | 安徽芯瑞达科技股份有限公司 | Four-wafer Mini LED backlight module |
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