CN101038073A - LED luminous source lamp box - Google Patents
LED luminous source lamp box Download PDFInfo
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- CN101038073A CN101038073A CNA2006100574340A CN200610057434A CN101038073A CN 101038073 A CN101038073 A CN 101038073A CN A2006100574340 A CNA2006100574340 A CN A2006100574340A CN 200610057434 A CN200610057434 A CN 200610057434A CN 101038073 A CN101038073 A CN 101038073A
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Abstract
The present invention provides a light box. The surface luminosity is still asymmetry when the light source is lighted by using light sources having strong pointing property such as LED. The lamp box includes a box body opening in the front; at least two wiring plates disposed opposite to each other and parallel to the side wall of the box body; multiple lighting elements disposed on the wiring plates; a light reflect plated disposed on the bottom of the box body; a transparent light diffuse surface plate is disposed at the front opening of the box body. The light box is characterized in that the light reflect plate has a hill type protruding part that protrudes to the front opening of the box body; when the distance between the bottom of the box body and the bottom of the lighting part of the lighting element is represented by h, the distance between the bottom of the box body and the light diffusion surface plate is represented by d, and the distance between the bottom of the box and the top point of the hill type protruding part is represented by L, then h < L <= (h+d)/2.
Description
Technical field
The present invention relates to (Light Emitting Diode with LED, be also referred to as " light emitting diode " below) as the lamp box of the internal irradiation type of light source, more particularly, the present invention relates to following lamp box, although it is brighter, thinner, the surperficial luminosity during light source igniting does not still have inhomogeneous, is suitable for the back of the body illuminator of Advertisement with decorative lamp board, internal irradiation type sign, liquid crystal indicator, ligthing paraphernalia etc.
Background technology
In the past, in the lamp box of internal irradiation type, adopt the light source of the straight tube-like of fluorescent lamp, cold-cathode tube etc.But, because the service life of fluorescent lamp is shorter, such as, in the occasion of the common straight tube-like fluorescent lamp of 40W, its life-span is 12000 hours, in the occasion that is arranged at high-order convenience store, the billboard at station etc., definitely can't operation whenever cutting off lamp, therefore, change together for annual 1 time, but, have and carry out the problem that must implement etc. at night as the operation of high-order operation.
On the other hand, owing to, can't carry out the replacing of lamp etc., be 50000 hours the cold-cathode tube of growing so adopt the life-span in the occasion of the back of the body illuminator of liquid crystal indicator.But, cold-cathode tube with light-source brightness be time of 1/2 as its life-span, if through 50000 hours, then brightness is 1/2.In addition, owing to cold-cathode tube uses according to the high-tension mode that adds 1000V, so have the problem of following the electric leakage accident that is easy to generate.
Therefore, recently, adopt widely LED as the lamp box of the internal irradiation type of light source (such as, patent documentation 1).In the occasion that LED is used as light source, even through 50000 hours occasion, its brightness reduction amount is still less than the occasion that adopts cold-cathode tube.And can reduce working voltage, power consumption, heating also reduce.
Such as, shown in patent documentation 1, people know following lamp decoration device, wherein, LED is set on light reflection surface, and to its wiring, covers the plastic plate with transmitance above LED and light reflection surface.But, because the directive property of the light of LED is strong, so if the light-emitting area of LED towards the direction of the plastic plate with transmitance, then has surface brightness and produces uneven problem.
Therefore, the picture such as, shown in the patent documentation 2 and 3 like that, people know following planar illuminator, it has light source, admits the shell of light source, light diffusing sheet by light transmission forms the shell front, and the shell back side is made of the reflecting plate that reflecting surface forms by the inboard, and above-mentioned light source is arranged on the internal face of 1 shell at least.By light source being arranged on the outer casing inner wall face, the part of the light that penetrates from light source is directly shone light diffusing sheet, realize diffused transmission, in addition, the part of light contacts with reflecting plate, reflect, light diffusing sheet is shone, realize diffused transmission, thus, though solve the uneven problem of surperficial luminosity slightly, the solution of this problem is still insufficient.
Patent documentation 1:JP spy opens flat 10-83148 document
Patent documentation 2:JP opens flat 6-15006 document in fact
Patent documentation 3:JP spy opens flat 7-72815 document
Summary of the invention
The object of the present invention is to provide a kind of lamp box, wherein, even adopting as LED, under the situation of the light source that directive property is strong, surperficial luminosity during light source igniting does not still have inhomogeneous, and this lamp box is suitable for the back of the body illuminator of Advertisement with decorative lamp board, internal irradiation type sign, liquid crystal indicator, ligthing paraphernalia etc.
In order to solve above-mentioned problem, the inventor has carried out deep analysis emphatically, consequently finds to have specific shape in employing, the occasion of the light reflecting board that diffuse reflectance is higher, obtain surperficial luminosity do not have inhomogeneous, high efficiency lamp box.That is, the present invention is:
(1) provide a kind of lamp box, this lamp box comprises the casing of open-front; According to parallel with the side wall portion of this casing, at least 2 wiring plates that opposed facing mode is provided with; Be arranged at a plurality of light-emitting components on this wiring plate; Be arranged at the light reflecting board on the bottom of this casing; Be arranged at the light diffusing surface plate of light transmission of the front openings portion of this casing, it is characterized in that:
On above-mentioned light reflecting board, form towards above-mentioned casing front openings portion and outstanding mountain type protuberance;
Distance between the bottommost of the illuminating part of the bottom of above-mentioned casing and above-mentioned light-emitting component is represented by h, distance between the bottom of above-mentioned casing and the above-mentioned smooth diffusing surface plate is represented by d, when the distance between the summit of the bottom of above-mentioned casing and above-mentioned mountain type protuberance is represented by L, then satisfy h＜L≤(h+d)/2.
(2) (1) described lamp box is provided, it is characterized in that above-mentioned light reflecting board for have in inside mean air bubble diameter more than optical wavelength, 50 μ m or the following trickle bubble or the film or the sheet of leachy thermoplastic resin, the diffuse reflectance of the visible light of above-mentioned light reflecting board 90% or more than.
(3) (2) described lamp box is provided, it is characterized in that the film of above-mentioned thermoplastic resin or sheet by thickness at 200 μ m～2000 μ m, and proportion forms at 0.1～0.7 thermoplastic polyester foams.
(4) provide (1)～any one described lamp box in (3), it is characterized in that in above-mentioned smooth diffusing surface plate full light transmittance is 20%～50%, and full light reflectance is 50%～80%.
Lamp box of the present invention adopts the light reflecting board of given shape, even under the situation of the strong light source of the directive property that adopts the light as LED, surperficial luminosity does not still have inhomogeneous, can reduce thickness, improves brightness, saves energy.
Description of drawings
Fig. 1 is the stereogram of an example of expression lamp box of the present invention;
Fig. 2 is the cutaway view of each position component of expression lamp box of the present invention;
Fig. 3 is the mensuration position reduced graph of surperficial luminosity.
The specific embodiment
Lamp box of the present invention comprises the casing of open-front; According to parallel with the side wall portion of this casing, at least 2 wiring plates that opposed facing mode is provided with; Be arranged at a plurality of light-emitting components on this wiring plate; Be arranged at the light reflecting board on the bottom of this casing; Be arranged at the light diffusing surface plate of light transmission of the front openings portion of this casing.
In the present invention, parallel with the side wall portion of casing, opposed facing position is provided with at least 2 wiring plates.Such as, the occasion that is rectangle substantially in the bottom of casing, 2 wiring plates both can be provided with according to the mode parallel with the internal face of short brink, also can be provided with according to the mode parallel with the internal face of long side.In addition, also 4 wiring plates can be set according to the mode parallel with whole side wall portions.
A plurality of light-emitting components are set on wiring plate.Best, along the length direction on the wiring plate a plurality of light-emitting components are set according to 1 row or the above mode of aliging of 1 row.
Light-emitting component as light source is not special the qualification, can suitably adopt bullet cut, surface installing type etc.Illuminant colour can be red, green, blue, Huang, the random color in white.The visual angle neither limit especially, is preferably in 15～30 ° the scope.Because the brightness of light-emitting component is relevant with power consumption, so according to circumstances and suitably select.
In the present invention, light reflecting board is arranged at the bottom of casing, has the outstanding mountain type protuberance towards casing front openings portion.The shape of light reflecting board of the present invention will specifically describe in the back.
Best, light reflecting board of the present invention is in inside, has mean air bubble diameter more than optical wavelength, the film or the sheet of the thermoplastic resin of 50 μ m or following trickle bubble or pore.
For the film of thermoplastic resin or the material of sheet, such as, enumerated polyethylene, polypropylene, polystyrene, polyvinyl chloride, Polychlorinated biphenyls, PETG, the resins for universal use of polyvinyl alcohol etc., Merlon, polybutylene terephthalate (PBT), poly-naphthalene ethyl ester, polyamide, poly-acetal, polyphenylene ether (polyphenylene ether), ultra-high molecular weight polyethylene, polysulfones, polyether sulfone (polyether sulfone), the polyphenyl sulfite, polyarylate, polyamide-acid imide, PEI, polyether-ether-ketone, polyimides, polytetrafluoroethylene (PTFE), liquid crystal polymer, the engineering plastics of fluororesin etc., or their copolymer or mixture etc.In these compositions,, be preferably polyester, polyphenyl sulfite, polypropylene, cyclopolyolefin from good aspects such as hear resistance, resistances to impact.In addition, be used for the resin of said reflection plate, can suitably adding antioxidant, ultraviolet ray prevents agent, lubricant, pigment, reinforcing agent etc.In addition, also can apply and form the coating layer that comprises these additives.
More particularly, preferred embodiment as light reflecting board, enumerated in inside and had mean air bubble diameter more than optical wavelength, the film or the sheet of 50 μ m or following trickle bubble or leachy thermoplastic resin, the film of thermoplastic resin or sheet with filler, be core with the filler, form the film or the sheet in many spaces.In this occasion, best, in the latter's film or sheet, film or sheet with thermoplastic resin of filler are porous extension film or sheet, wherein, not extension film or the sheet with filler formed, extension film or sheet do not stretch to this, thus, be that core forms many spaces with the filler.
Best, the thickness of light reflecting board is in the scope of 200～2000 μ m.If the thickness of light reflecting board is in the scope of 200～2000 μ m then have rigidity, the light at the back side of light reflecting board leaks also few.
Best, the proportion of light reflecting board is in 0.1～0.7 scope.If the proportion of light reflecting board surpasses 0.7, even then under the situation of the necessary condition that satisfies other, owing to follow the transparent ratio of light reflecting board, the leakage of the light at the light reflecting board back side increases, so the light loss increasing.
Best, the diffuse reflectance of light reflecting board 90% or more than.The diffuse reflectance of light reflecting board is high more good more, still, is limited to 120% on it.The scope that is more preferably is in 90～110% scope.In addition, diffuse reflectance is according to adopting self-recording spectrophotometer (UV-3101PC: Shimadzu Seisakusho Ltd. produces), measure the reflectivity of the wavelength of 550nm, the diffuse reflectance of blank that is fixed with the fine-powder of barium sulfate is the value that 100% o'clock relative value is obtained.
In the present invention, the light diffusing surface plate of light transmission is arranged at the front openings portion of casing.
Light diffusing surface plate preferably adopts full light transmittance at 20%～50% plate, preferably adopts full light reflectance at 50%～80% plate.If it is too much that full light transmittance, then obtains the amount of the necessary light source of brightness of light diffusing surface plate less than 20%.If full light transmittance surpasses 50%, then too make the strong light of directive property of light-emitting component realize transmission.Full light transmittance and the full value of light reflectance for obtaining according to JIS K 7105-1981.
If arrive light diffusing surface plate from the strong light of the directive property of light source irradiation, then relevant with full light transmittance, a part realizes transmission, and rest parts reflects and turns back to inside.Turn back to the inner light reflecting board scattered reflection of passing through by the reflection of this light diffusing surface plate, turn back to light diffusing surface plate side once more.Carry out repeatedly above-mentioned action during, the strong light of the directive property of light-emitting component arrives the entire scope of light diffusing surface plate, forms the little lamp box of light inhomogeneities.
In the present invention, the shape of light reflecting board is as described below.
Promptly, distance between the bottommost of the illuminating part of the bottom of casing and light-emitting component is represented by h, distance between the bottom of casing and the light diffusing surface plate represented by d, when the distance between the summit of the mountain type protuberance of the bottom of casing and light reflecting board is represented by L, then satisfies h＜L≤(h+d)/2.If satisfy above-mentioned formula,, obtain not show uneven lamp box because the light of light source shines the whole scope in surface equably.
In the occasion of L≤h, can't obtain the good light scattered reflection effect of light reflecting board, surperficial luminosity reduces.Occasion at L＞(h+d)/2 at the pars intermedia of light diffusing surface plate, produces brighter part abreast with wiring plate, and surperficial luminosity is inhomogeneous.For this brighter part, has the increase of the distance L between the summit of mountain type protuberance of the bottom of following casing and light reflecting board, the tendency that its narrowed width, brightness increase.
(embodiment 1)
Provide a preferred example of lamp box of the present invention below.
On the internal face 12 of the short brink of the casing that is rectangle substantially 11 of Chang Kaiing 2 wiring plates 21 are set in front.In the inside dimension of casing, longitudinal size is 323mm, and lateral dimension is 903mm, and the degree of depth is 90mm.In addition, in the size of wiring plate 21, longitudinal size is 30mm, and lateral dimension is 270mm, apart from the internal face 1210mm of the short brink of casing, is provided with abreast with the internal face 12 of short brink.
On wiring plate 21, according to the spacing of 10mm, vertical 3, horizontal 27 are provided with a plurality of light-emitting components 31 equally spacedly.This light-emitting component 31 adopts white, and the visual angle is 20 °, and brightness is the type of 9200mcd.The current value of corresponding light-emitting component is 21mA when DC15V.
In the front openings portion of casing 11, the light diffusing surface plate 41 of light transmission is set.In addition, in Fig. 1, for inside is described, light diffusing surface plate 41 illustrates at the state of pulling down.
It is 323mm that light diffusing surface plate 41 adopts longitudinal size, and lateral dimension is 903mm, and thickness is the newborn semicrystalline propylene acid resin plate (レ イ ヨ Application Co., Ltd. of Mitsubishi produces, and trade name is ア Network リ ラ イ ト, and look # is 430) of 2mm.The full light transmittance of this light diffusing surface plate 41 is 40%, and reflectivity is 60%.
In the bottom of casing 11 light reflecting board 51 is set.This light reflecting board 51 is the shape of mountain type, wherein, two minor faces of the bottom of the casing 11 that is rectangle relatively substantially, the pars intermedia of light reflecting board is given prominence to towards casing front openings portion.Specifically, the distance between the lowest part of the illuminating part of the bottom of casing and light-emitting component 31 is 25mm, and the distance between the bottom of casing and the light diffusing surface plate 41 is 90mm, and the distance between the summit of the bottom of casing and mountain type protuberance is 55mm.
In addition, it is 10 μ m that light reflecting board 51 adopts mean air bubble diameter, and thickness is 1mm, and proportion is 0.325, and diffuse reflectance is 97% PETG foams (The Furakawa Electric Co., Ltd. produces, and trade name is MCPET).
Directly make photometer (Yokogawa M﹠amp; The GENERAL TYPE AA of C Co., Ltd. level photometer model is 51002) and light diffusing surface plate 41 direct contact measurements surface luminosity.This measure shown in image pattern 4 like that, carry out at 4 bights of the end 30mm of distance light diffusing surface plate, the centre on long limit, 7 positions in the middle of the light diffusing surface plate.Its result provides in table 1.
In lamp box of the present invention, it is inhomogeneous to confirm that surperficial luminosity does not have.
(comparative example 1)
Distance between the bottom of casing and the light-emitting component 31 is 25mm, and the distance between the bottom of casing and the light diffusing surface plate 41 is 90mm, and the distance between the summit of the bottom of casing and mountain type protuberance is 80mm, and aspect in addition is identical with embodiment 1.
The result who measures surperficial luminosity provides in table 1.At the pars intermedia of light diffusing surface plate, produce brighter part (being equivalent to B, the D among Fig. 3, the part of F) abreast with the internal face of the short brink of casing, surperficial luminosity presents inhomogeneous.
Table 1
| | Comparative example 1 | |
| A | 1080 | 998 |
| B | 1060 | 1105 |
| C | 1085 | 1001 |
| D | 1101 | 1120 |
| E | 1079 | 990 |
| F | 1070 | 1112 |
| G | 1084 | 1004 |
Unit; Lux (lux)
Claims (4)
1. lamp box, this lamp box comprises the casing of open-front; According to parallel with the side wall portion of this casing, at least 2 wiring plates that opposed facing mode is provided with; Be arranged at a plurality of light-emitting components on this wiring plate; Be arranged at the light reflecting board on the bottom of this casing; Be arranged at the light diffusing surface plate of light transmission of the front openings portion of this casing, it is characterized in that:
On above-mentioned light reflecting board, form towards above-mentioned casing front openings portion and outstanding mountain type protuberance;
Distance between the bottommost of the illuminating part of the bottom of above-mentioned casing and above-mentioned light-emitting component is represented by h, distance between the bottom of above-mentioned casing and the above-mentioned smooth diffusing surface plate is represented by d, when the distance between the summit of the bottom of above-mentioned casing and above-mentioned mountain type protuberance is represented by L, then satisfy h＜L≤(h+d)/2.
2. lamp box according to claim 1, it is characterized in that above-mentioned light reflecting board is for to have mean air bubble diameter more than optical wavelength in inside, 50 μ m or following trickle bubble or the film or the sheet of leachy thermoplastic resin, the diffuse reflectance of the visible light of above-mentioned light reflecting board 90% or more than.
3. lamp box according to claim 2, it is characterized in that the film of above-mentioned thermoplastic resin or sheet by thickness at 200 μ m～2000 μ m, and proportion forms at 0.1～0.7 thermoplastic polyester foams.
4. according to any one the described lamp box in the claim 1～3, it is characterized in that in above-mentioned smooth diffusing surface plate that full light transmittance is 20%～50%, and full light reflectance is 50%～80%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2006100574340A CN101038073A (en) | 2006-03-15 | 2006-03-15 | LED luminous source lamp box |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2006100574340A CN101038073A (en) | 2006-03-15 | 2006-03-15 | LED luminous source lamp box |
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|---|---|
| CN101038073A true CN101038073A (en) | 2007-09-19 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2006100574340A Pending CN101038073A (en) | 2006-03-15 | 2006-03-15 | LED luminous source lamp box |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101793360A (en) * | 2010-03-15 | 2010-08-04 | 海洋王照明科技股份有限公司 | Lamp and reflecting cup thereof |
| CN101865394A (en) * | 2010-06-22 | 2010-10-20 | 康佳集团股份有限公司 | LED grille lamp |
| US7891839B2 (en) | 2008-06-27 | 2011-02-22 | Fu Zhun Precision Industry (Shen Zhen) Co., Ltd. | LED lamp |
| WO2012065306A1 (en) * | 2010-11-18 | 2012-05-24 | 达能科技股份有限公司 | Lamp box device capable of converting point light source into uniformly distributed surface light source |
| CN102667324A (en) * | 2009-09-30 | 2012-09-12 | 克里公司 | Light emitting diode (led) lighting systems including low absorption, controlled reflectance and diffusion layers |
| CN103836445A (en) * | 2012-11-26 | 2014-06-04 | 杰希智能居家用品科技(惠州)有限公司 | LED lamp box applied to furniture |
| CN104110595A (en) * | 2010-04-10 | 2014-10-22 | Lg伊诺特有限公司 | Lighting apparatus |
| CN105096769A (en) * | 2015-08-27 | 2015-11-25 | 惠阳帝宇工业有限公司 | Emergency indicator light |
| CN107810362A (en) * | 2015-06-16 | 2018-03-16 | 飞利浦照明控股有限公司 | Launch the light fixture of a part of UV light |
| CN114754336A (en) * | 2021-11-02 | 2022-07-15 | 广东皇智照明科技有限公司 | Sensor-controlled lighting device |
-
2006
- 2006-03-15 CN CNA2006100574340A patent/CN101038073A/en active Pending
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7891839B2 (en) | 2008-06-27 | 2011-02-22 | Fu Zhun Precision Industry (Shen Zhen) Co., Ltd. | LED lamp |
| CN102667324A (en) * | 2009-09-30 | 2012-09-12 | 克里公司 | Light emitting diode (led) lighting systems including low absorption, controlled reflectance and diffusion layers |
| CN101793360A (en) * | 2010-03-15 | 2010-08-04 | 海洋王照明科技股份有限公司 | Lamp and reflecting cup thereof |
| CN101793360B (en) * | 2010-03-15 | 2012-10-10 | 海洋王照明科技股份有限公司 | Lamp and reflecting cup thereof |
| CN104110595A (en) * | 2010-04-10 | 2014-10-22 | Lg伊诺特有限公司 | Lighting apparatus |
| CN101865394A (en) * | 2010-06-22 | 2010-10-20 | 康佳集团股份有限公司 | LED grille lamp |
| WO2012065306A1 (en) * | 2010-11-18 | 2012-05-24 | 达能科技股份有限公司 | Lamp box device capable of converting point light source into uniformly distributed surface light source |
| CN103836445A (en) * | 2012-11-26 | 2014-06-04 | 杰希智能居家用品科技(惠州)有限公司 | LED lamp box applied to furniture |
| CN107810362A (en) * | 2015-06-16 | 2018-03-16 | 飞利浦照明控股有限公司 | Launch the light fixture of a part of UV light |
| CN107810362B (en) * | 2015-06-16 | 2020-06-26 | 飞利浦照明控股有限公司 | Lighting assembly emitting a portion of UV light |
| CN105096769A (en) * | 2015-08-27 | 2015-11-25 | 惠阳帝宇工业有限公司 | Emergency indicator light |
| CN114754336A (en) * | 2021-11-02 | 2022-07-15 | 广东皇智照明科技有限公司 | Sensor-controlled lighting device |
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