CN202708818U - LED area source using side-glowing light-emitting column - Google Patents
LED area source using side-glowing light-emitting column Download PDFInfo
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- CN202708818U CN202708818U CN2012202383620U CN201220238362U CN202708818U CN 202708818 U CN202708818 U CN 202708818U CN 2012202383620 U CN2012202383620 U CN 2012202383620U CN 201220238362 U CN201220238362 U CN 201220238362U CN 202708818 U CN202708818 U CN 202708818U
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Abstract
The utility model discloses an LED area source using a side-glowing light-emitting column, comprising a framework, a LED light source, a light guide column and an astigmatism sheet possessing a gradual change reflecting rate, wherein the LED light source is a plane type double face light extraction LED light source, the inner of which is provided with at least one LED chip; the LED light source and the light guide column are fixed in the framework; the LED light source is embedded into the light guide column; the astigmatism sheet covers the framework. According to the utility model, aiming at overcoming the defects of bad brightness uniformity caused by low peripheral brightness of a framework of a traditional structure, two ends of the light guide column are embedded into the LED light source to meanwhile cooperate with the astigmatism sheet to improve brightness uniformity of a backlight; meanwhile the plane type double face light extraction LED light source possesses the characteristics of high brightness, good thermal conductivity and a long service life, does not consume extra electricity and improves corresponding performances of the backlight.
Description
Technical field
The utility model relates to a kind of LED-backlit source, relates in particular to the LED area source that a kind of distribution of light is uniform, use the luminous Column being luminous of side.
Background technology
Liquid crystal display is general main by the LCD(liquid crystal panel) and backlight form.Because LCD itself is not luminous, so LCD need to realize transmission or reflective display by external light source, thereby existing LCD great majority are the transmission-type devices with backlight, the characteristics of luminescence of backlight will directly have influence on the picture quality of LCD display spare, and backlight is the very important building block of liquid crystal display.The CCFL(cold-cathode lamp light pipe of cheap, technology maturation) is the main back light of existing LCD backlight, but the reason because of itself structure and assembling, produce the ray phenomenon when easily causing finished product luminous, can't satisfying the market to the more and more perfectly requirement of visual effect of back light.
Led light source is the green colored backlights light source of future generation that is expected most, compares with other back light, and it has the following advantages: 1, led light source is a kind of flat-type light source, and the as easy as rolling off a log area source that forms set area of combining has good brightness uniformity; 2, reach 100,000 hours the service life of led light source, even if used 10 hours every day continuously, also can use continuously 27 years, greatly prolonged the service life of backlight; 3, led light source has firm internal structure, and anti-seismic performance is outstanding; 4, led light source does not need to use environmentally harmful mercury metal, more environmental protection.
The commercialization form in LED-backlit source mainly contains two kinds at present: a kind of is side-light type LED lamp, namely at the edge designs LED of liquid crystal display lamp; A kind of is straight-down negative LED lamp, namely all designs the LED lamp at the whole back side of liquid crystal display.The shortcoming of side-light type LED lamp mainly be can not carry out the light local area control, difficulty is applicable to large-sized backlight demand, the general following size backlight of 30in can adopt side-light type LED lamp.Straight-down negative LED modulated structure main devices comprises face type lamp plate (led light source) and diffuser plate, for so that emitting brightness is even, and the gap of nearly 20 ~ 30mm between face type lamp plate and the diffuser plate, thereby be difficult for slimming and adopt more LED sealing-in; Simultaneously, because the refractive index of the filler (being generally silica gel) of face type lamp onboard led sealing-in is about n=1.5, the light that led chip sends has total internal reflection at the light output surface of filler, has reduced the light extraction efficiency of led chip; And the light-entering surface of diffuser plate can produce reflection, and the light that the light output surface that encapsulates from LED sends is that some can not enter in the diffuser plate.
The utility model content
Goal of the invention: in order to overcome the deficiencies in the prior art, the utility model provide a kind of simple in structure, distribution of light evenly, the LED area source of the luminous Column being luminous of usefulness side of good heat conductivity, long service life.
Technical scheme: for solving the problems of the technologies described above, the technical solution adopted in the utility model is:
A kind of LED area source with the luminous Column being luminous of side comprises framework, led light source, light-guiding pillar, has the scattering sheet of gradual change reflecting rate, and wherein led light source is the two-sided light extracting LED light source of plane formula, is provided with an above led chip in it; Described led light source and light-guiding pillar all are fixed in the framework, and led light source is embedded in the light-guiding pillar, and described scattering sheet covers on the framework.
Above-mentioned backlight adopts the two-sided light extracting LED light source of plane formula, has solved the heat dissipation problem of traditional LED, and has effectively reduced the overall weight of backlight, can make ultrathin module; Cooperate light-guiding pillar and scattering sheet spot light can well be converted into area source, when led light source is luminous, evenly spread on the whole screen from the light transmission reflector of screen edge emission, whole so just have enough backlight bright, overcome traditional straight-down negative LED lamp and the inhomogeneous shortcoming of side entering type LED modulated structure backlight bright dipping, also greatly improved the utilization rate of led light source self simultaneously; In order to reach brightness requirement, can be provided with the plurality of LED chip in led light source inside.
Preferably, described led light source is embedded in the two ends of light-guiding pillar, the two ends that are light-guiding pillar have all embedded led light source, cooperate radiator and LED supply unit can solve well wire jumper and heat dissipation problem that traditional straight-down negative LED lamp and single arrangement of side entering type LED lamp led chip cause; Preferably, the power of described led light source is more than 0.5W, and lighting angle is 100 °, and is perhaps less.
Preferably, described light-guiding pillar is the shape that linear, Gauss surface shape or linear and Gauss surface shape combine according to the optical strength principle design; Can be well the LED spot light be disperseed according to the calculation optimization result, reach and evenly go out effect of light, greatly improve the utilization rate of led light source simultaneously.
Preferably, the surface of described light-guiding pillar cooperates the calculation optimization result according to the principle that goes out luminous intensity and light extraction efficiency, can do the optical treatment of the modes such as plated film, gradual change type spraying, polishing or etching.
Preferably, the material of described light-guiding pillar is transparent material, can be one or more the combination in the materials such as glass, crystalline ceramics, transparent plastic, transparent resin, transparent crystal, yttrium-aluminium-garnet (YAG).
Preferably, described scattering sheet realizes the gradual change reflecting rate by the gradual change type reflection graphic patterns of one side surface, at the opposite side plated surface reflectance coating of scattering sheet; Like this when light passes through scattering sheet, because the difference of gradual change type reflection graphic patterns reflection transmitance makes the equally distributed light extraction efficiency that improved simultaneously of light; Described gradual change type Christmas tree pattern can be realized by dual mode: the one, and print at substrate surface, spray, the processing such as printing or evaporation, to cover the coating formation of different-thickness, the material of described coating is one or more the combination in the materials such as glass, crystalline ceramics, yttrium-aluminium-garnet, resin, the perhaps employed material of reference optical plated film; The 2nd, directly do the processing such as etching, cutting, polishing in substrate, form with the thickness difference that forms substrate.
Preferably, the base material of described scattering sheet is transparent resin material.
Preferably, described frame inner surface can form by the surface treatment of the modes such as polishing, polishing, evaporation high reflection or minute surface diffuse surface, improves its optical characteristics, and the cooperated with LED light source reaches the purpose that improves light extraction efficiency better; If form high reflection or minute surface diffuse surface by increase coating way (increasing coating by the evaporation mode) at frame inner surface, the material of coating can be organic high reflecting material (such as polytetrafluoroethylene (PTFE)), oxide material (such as titanium oxide, zirconia, magnesia, aluminium oxide) or high reflective aluminum silver alloy.The material of described framework is the existing backlight frame materials such as plastics, aluminium alloy or titanium alloy, to reach the purpose of weight reduction, antidetonation, heat radiation.
The LED area source of the luminous Column being luminous of usefulness side of this case if increase polaroid, can also use as the LCD panel.
Beneficial effect: the LED area source of the luminous Column being luminous of usefulness side that the utility model provides, for the low poor existing defective of brightness uniformity that causes of brightness around the traditional structure middle frame, adopted light-guiding pillar two ends embedded with LED light source to cooperate simultaneously the structure of scattering sheet, the brightness uniformity of backlight is improved; The two-sided light extracting LED light source of plane formula that simultaneously this case is adopted has the characteristics such as brightness height, good, the not extra power consumption of thermal conductivity, long service life, has improved the respective performances of backlight.
Description of drawings
Fig. 1 is structural representation of the present utility model;
Fig. 2 is the structural representation of the led light source of the utility model employing;
Fig. 3 is the structural representation of the light-guiding pillar of embedded with LED light source.
The specific embodiment
Below in conjunction with accompanying drawing the utility model is further described.
Be illustrated in figure 1 as a kind of LED area source with the luminous Column being luminous of side, comprise framework 3, led light source 1, light-guiding pillar 2, have the scattering sheet 4 of gradual change reflecting rate, wherein led light source 1 is the two-sided light extracting LED light source of plane formula, is provided with an above led chip in it; Described led light source 1 and light-guiding pillar 2 all are fixed in the framework 3, and led light source 1 is embedded in the light-guiding pillar 2, and described scattering sheet 4 covers on the framework 3.Described led light source 1 is embedded in the two ends of light-guiding pillar 2.
Described led light source 1 is the two-sided light extracting LED light source of plane formula, be provided with an above led chip 1-1 in it, described led chip 1-1 becomes array to arrange, led chip 1-1 can be red LED chip, blue-light LED chip or green light LED chip, but the final led light source 1 of General Requirements is white light LEDs; Led light source 1 as shown in Figure 2 is at the aluminium base 1-2 two LEDs chip 1-1 that arranged.
As shown in Figure 3, all embedded led light source 1 at the two ends of light-guiding pillar 2, light-guiding pillar 2 is the shape that linear, Gauss surface shape or linear and Gauss surface shape combine according to the optical strength principle design.The different surfaces shape of light-guiding pillar 2 has determined the different performance that it has: when light-guiding pillar 2 adopted the linear shape, 2 of light-guiding pillars had light-guiding function; When light-guiding pillar 2 adopted Gauss surface shape shape, light-guiding pillar 2 had diffusion function.The shape of the light-guiding pillar 2 that linear and Gauss surface shape combine is preferably adopted in this case, after incident light enters from the end of light-guiding pillar 2, penetrate on Gauss surface, under the effect of Gauss surface, light mainly in the inside of light-guiding pillar along with the light output surface of light-guiding pillar almost parallel direction propagate.
Described light-guiding pillar 2 adopts transparent materials (such as one or more the combination in the materials such as glass, crystalline ceramics, yttrium-aluminium-garnet, resin), section can be dispersed with astigmatic particle within it, can carry out optical treatment (modes such as plated film, gradual change type spraying, polishing or etching, concrete can be at its end coated one deck light scattering layer etc.) on its surface.
Scattering sheet 4 mainly is to allow within it the light propagated be subject to simultaneously the effect of scattering and reflection, the design of the light scattering ratio by scattering sheet 4 rationally is set, light transmission, gradual change type reflection graphic patterns, can change the direction of propagation of main light, light is almost propagated along the direction of parallel conductive light beam 2 light output surfaces, improved light-guiding pillar 2 and go out uniformity of light.The base material of described scattering sheet 4 is transparent resin material (such as polymethyl methacrylate (PMMA), polycarbonate (PC), polystyrene (PS) etc.); Simultaneously, in base material, can be doped with optical scatter, with scattering and the transmitance of light regulating.Described gradual change type Christmas tree pattern can be realized by dual mode: the one, and print at substrate surface, spray, the processing such as printing or evaporation, to cover the coating formation of different-thickness, the material of described coating is one or more the combination in the materials such as glass, crystalline ceramics, yttrium-aluminium-garnet, resin, the perhaps employed material of reference optical plated film; The 2nd, directly do the processing such as etching, cutting, polishing in substrate, form with the thickness difference that forms substrate.The structure of appropriate design cutter mating plate 4 such as the shape and the density that increase coating, V-type groove structure, distribution site in light guide sheet 4, can improve the brightness uniformity of emergent light.
Described framework 3 inner surfaces can improve its optical characteristics by the surface treatment of the modes such as polishing, polishing, evaporation, and cooperated with LED light source 1 reaches the purpose that improves light extraction efficiency better; The material of described framework 3 is the existing backlight frame materials such as plastics, aluminium alloy or titanium alloy, to reach the purpose of weight reduction, antidetonation, heat radiation.
In the structure of this case, the exiting surface of LED1 light source can directly touch light-guiding pillar 2, thereby, the thickness of the light-emitting component of the backlight of this case is the thickness that the thickness of light guide sheet 4 adds led light source 1, need not between light guide sheet 4 and led light source, to keep very large space, realized the slimming of backlight.
The above only is preferred embodiment of the present utility model; be noted that for those skilled in the art; under the prerequisite that does not break away from the utility model principle; can also make some improvements and modifications, these improvements and modifications also should be considered as protection domain of the present utility model.
Claims (8)
1. LED area source with the luminous Column being luminous of side, it is characterized in that: this backlight comprises framework (3), led light source (1), light-guiding pillar (2), has the scattering sheet (4) of gradual change reflecting rate, wherein led light source (1) is the two-sided light extracting LED light source of plane formula, is provided with an above led chip in it; Described led light source (1) and light-guiding pillar (2) all are fixed in the framework (3), and led light source (1) is embedded in the light-guiding pillar (2), and described scattering sheet (4) covers on the framework (3).
2. the LED area source with side luminous Column being luminous according to claim 1, it is characterized in that: described led light source (1) is embedded in the two ends of light-guiding pillar (2), and the power of described led light source (1) is more than 0.5W, and lighting angle is less than or equal to 100 °.
3. the LED area source with side luminous Column being luminous according to claim 1, it is characterized in that: described light-guiding pillar (2) is the shape that linear, Gauss surface shape or linear and Gauss surface shape combine according to the optical strength principle design.
4. the LED area source with side luminous Column being luminous according to claim 1, it is characterized in that: the surface of described light-guiding pillar (2) is through the optical treatment of plated film, gradual change type spraying, polishing or etching mode.
5. the LED area source with side luminous Column being luminous according to claim 1, it is characterized in that: described scattering sheet (4) realizes the gradual change reflecting rate by the gradual change type reflection graphic patterns of one side surface, at the opposite side plated surface reflectance coating of scattering sheet (4); Described gradual change type Christmas tree pattern by print at substrate surface, spray, printing or vapor deposition treatment, to cover the coating formation of different-thickness, perhaps directly do etching, cutting, grinding process in substrate, form with the thickness difference that forms substrate.
6. the LED area source with side luminous Column being luminous according to claim 1, it is characterized in that: the base material of described scattering sheet (4) is transparent resin material.
7. the LED area source with side luminous Column being luminous according to claim 1, it is characterized in that: described framework (3) inner surface forms high reflection or minute surface diffuse surface through the surface treatment of polishing, polishing, evaporation mode.
8. the LED area source with side luminous Column being luminous according to claim 1, it is characterized in that: the material of described framework (3) is plastics, aluminium alloy or titanium alloy material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012202383620U CN202708818U (en) | 2012-05-25 | 2012-05-25 | LED area source using side-glowing light-emitting column |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012202383620U CN202708818U (en) | 2012-05-25 | 2012-05-25 | LED area source using side-glowing light-emitting column |
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| CN202708818U true CN202708818U (en) | 2013-01-30 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2012202383620U Expired - Fee Related CN202708818U (en) | 2012-05-25 | 2012-05-25 | LED area source using side-glowing light-emitting column |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102720987A (en) * | 2012-05-25 | 2012-10-10 | 苏州晶品光电科技有限公司 | Light emitting diode (LED) area source employing side light emitting bar |
| CN105177929A (en) * | 2015-10-31 | 2015-12-23 | 惠而浦（中国）股份有限公司 | Lighting device of washing machine |
-
2012
- 2012-05-25 CN CN2012202383620U patent/CN202708818U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102720987A (en) * | 2012-05-25 | 2012-10-10 | 苏州晶品光电科技有限公司 | Light emitting diode (LED) area source employing side light emitting bar |
| CN105177929A (en) * | 2015-10-31 | 2015-12-23 | 惠而浦（中国）股份有限公司 | Lighting device of washing machine |
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| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130130 Termination date: 20130525 |