CN203500951U - Direct-type LED (light emitting diode) backlight module adopting secondary light distribution and television adopting same - Google Patents
Direct-type LED (light emitting diode) backlight module adopting secondary light distribution and television adopting same Download PDFInfo
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- CN203500951U CN203500951U CN201320323731.0U CN201320323731U CN203500951U CN 203500951 U CN203500951 U CN 203500951U CN 201320323731 U CN201320323731 U CN 201320323731U CN 203500951 U CN203500951 U CN 203500951U
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Abstract
The utility model relates to a direct-type LED (light emitting diode) backlight module adopting secondary light distribution and a television adopting the same. The television comprises a direct-type LED backlight module, and is characterized in that each LED (1) of the direct-type backlight module is respectively provided with a secondary light distribution lens. According to the direct-type backlight module adopting the secondary light distribution, since the light emitting angle is increased, the light mixing path is reduced, the television can be thinned, the problem that the direct-type backlight television is too thick can be solved, the luminescent intensity is also increased, the number of the needed LED is reduced, and the cost of the direct-type television is reduced to a certain extent.
Description
Technical field
The utility model relates to a kind of TV that adopts the direct-light type LED backlight module of secondary light-distribution and adopt this LED-backlit module.
Background technology
LED TV has occupied most market shares at present.And the type of skill is mainly divided into two kinds, a kind of is side-light type LED TV, and another is direct-light type LED backlight TV, and the advantage of traditional side-light type is exactly can do thinner, LED number reduces, and shortcoming is that uniformity of light will rely on LGP, so cost rises.The color developing effect of light is not good enough a little, and that the advantage of straight-down negative is uniformity of light is good, and color developing effect quality is good, but module is partially thick, does not allow to be easy to do thin, and LED number is on the high side, and cost is higher.
Utility model content
One of the purpose of this utility model is to provide a kind of direct-light type LED backlight module that adopts secondary light-distribution, can improve the luminous intensity of LED-backlit module and the uniformity of lighting angle;
Two of the purpose of this utility model is to provide a kind of TV that adopts above-mentioned direct-light type LED backlight module, can make the number of the thinner and LED used of the thickness of TV still less.
A direct-light type LED backlight module that adopts secondary light-distribution, comprises LED, and its special feature is: secondary light-distribution lens is all installed on each LED.
Wherein secondary light-distribution lens adopts free-form surface lens.
A TV, comprises direct-light type LED backlight module, and its special feature is: on each LED of described direct-light type LED backlight module, secondary light-distribution lens is all installed.
Wherein secondary light-distribution lens adopts free-form surface lens.
It is a kind of by the later down straight aphototropism mode set of secondary light-distribution that the utility model provides, because the change of lighting angle is large, reduced mixed light light path, can TV be done thinlyyer, solved the too thick problem of direct-type backlight TV, luminous intensity has also become greatly simultaneously, and the LED number needing has reduced, and has reduced to a certain extent the cost of straight-down negative TV.
Accompanying drawing explanation
Accompanying drawing 1 is the backlight effect figure in the utility model background technology;
Accompanying drawing 2 is backlight effect figure of the present utility model;
Accompanying drawing 3 is the stereogram of LED and installation base plate in the utility model;
Accompanying drawing 4 is the side view of LED and installation base plate in the utility model.
The specific embodiment
As shown in Figure 2,3, 4, the utility model is a kind of direct-light type LED backlight module that adopts secondary light-distribution, comprises LED1, and secondary light-distribution lens is all installed on each LED1, and this secondary light-distribution lens specifically adopts free-form surface lens 2.
A TV, comprises direct-light type LED backlight module, on each LED1 of described direct-light type LED backlight module, secondary light-distribution lens is all installed, and this secondary light-distribution lens specifically adopts free-form surface lens 2.
Most of LED-backlits adopt the LED encapsulation of once light-distribution structure in the market, can meet most of requirements, but optical efficiency are higher after secondary light-distribution, and it is large that lighting angle becomes, and is more conducive to the utilization of special occasions.Applicant finds, the light effect of the LED1 through secondary light-distribution after, and light intensity, the distribution situation of colour temperature has re-started arranges, and is applied in the middle of straight-down negative TV, can be so that the thickness attenuation of TV, the number of LED1 reduces, totle drilling cost reduction.
Concrete methods of realizing of the present utility model is as follows:
Because the LED major part of dispatching from the factory on market is to be all Lang Baixing (Lambertian distribution) to distribute, central light strength is more intense, and is that symmetrical circular light spot distributes, and can not be directly used in LED-backlit.In order to meet direct-type backlight requirement, the light that LED chip sends can better be exported, farthest utilized, aspect backlight, met the demands, optics is redesigned, wherein, design in encapsulation process is called as primary optical design, and the design of carrying out outside LED is called secondary optical design, is also secondary light-distribution, the luminous exitance of once light-distribution major decision optical device, luminous flux size, light intensity magnitude, light distribution etc.
But in the middle of the process of using at LED, must be to going out light effect, light intensity, the distribution situation of colour temperature redesigns and just can meet the demands, and is called secondary optical design and also cries secondary light-distribution design.Carry out at present the basic optical element that the design of LED secondary light-distribution used and mainly contain lens, speculum and refractive power version etc., just for direct-type backlight applicant, adopt lens to carry out secondary light-distribution, object is to make lighting angle larger, light distribution is more even, thereby reduce the usage quantity of LED and the thickness of module, as shown in Figure 1, for not adopting secondary light-distribution LED1 lighting angle before.
As shown in Figure 1, the LED1 packaging effect figure of normal once light-distribution, lighting angle is generally in 120 degree left and right as we can see from the figure, yet this lighting angle is generally applied in the middle of side light type LED back light TV, also have some direct-light type LED backlight TVs also to adopt in this way, but for this mode of straight-down negative, just can not embody advantage, the illumination effect after secondary light-distribution of the present utility model as shown in Figure 2.
How luminous intensity distribution could be near ideal situation, reach downward back brightness and uniformity requirement, this is a great problem of LED optical design, and the spatial distribution curve of luminous intensity is commonly referred to distribution curve flux, obtain the uniform effect of straight-down negative, in light beam, the crevice projection angle of largest light intensity is extremely important.The vertical plane of LED, it is minimum that light intensity I0 should be, along with elevation angle theta increases, light intensity I θ increases.Functional relation is:
According to inverse square law, square being inversely proportional to of illumination and distance.Larger with vertical angle, light intensity is larger.When the crevice projection angle of largest light intensity in vertical plane reaches 55 °-65 °, can reach the requirement of uniformity of illuminance.In general, luminous intensity distribution is at this moment realized wide-angle " batswing tab " shape luminous intensity distribution.The utility model luminous intensity distribution adopts the LED secondary light-distribution of free-form surface lens 2.Modeling and simulating all carries out under Tracepro simulation software, the luminous intensity that secondary light-distribution is later, and lighting angle uniformity is all effective than once light-distribution, can be applied to direct-light type LED backlight system completely.
Claims (2)
1. a direct-light type LED backlight module that adopts secondary light-distribution, comprises LED(1), it is characterized in that: at each LED(1) on secondary light-distribution lens is all installed;
Wherein secondary light-distribution lens adopts free-form surface lens (2).
2. a TV, comprises direct-light type LED backlight module, it is characterized in that: at each LED(1 of described direct-light type LED backlight module) on secondary light-distribution lens is all installed;
Wherein secondary light-distribution lens adopts free-form surface lens (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320323731.0U CN203500951U (en) | 2013-06-06 | 2013-06-06 | Direct-type LED (light emitting diode) backlight module adopting secondary light distribution and television adopting same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320323731.0U CN203500951U (en) | 2013-06-06 | 2013-06-06 | Direct-type LED (light emitting diode) backlight module adopting secondary light distribution and television adopting same |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203500951U true CN203500951U (en) | 2014-03-26 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201320323731.0U Expired - Fee Related CN203500951U (en) | 2013-06-06 | 2013-06-06 | Direct-type LED (light emitting diode) backlight module adopting secondary light distribution and television adopting same |
Country Status (1)
| Country | Link |
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| CN (1) | CN203500951U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104154494A (en) * | 2014-07-09 | 2014-11-19 | 华南理工大学 | Free-form surface optical lens for ultrathin straight down type LED backlight system |
| CN106122834A (en) * | 2016-06-29 | 2016-11-16 | 南京久达光电科技有限公司 | Light-emitting diode system and method |
-
2013
- 2013-06-06 CN CN201320323731.0U patent/CN203500951U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104154494A (en) * | 2014-07-09 | 2014-11-19 | 华南理工大学 | Free-form surface optical lens for ultrathin straight down type LED backlight system |
| WO2016004724A1 (en) * | 2014-07-09 | 2016-01-14 | 华南理工大学 | Free-form curved surface optical lens of ultrathin direct led backlight system |
| CN106122834A (en) * | 2016-06-29 | 2016-11-16 | 南京久达光电科技有限公司 | Light-emitting diode system and method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140326 Termination date: 20150606 |
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| EXPY | Termination of patent right or utility model |