CN1536413A - Luminous device and method of reducing fluorescent tube image of luminous device - Google Patents
Luminous device and method of reducing fluorescent tube image of luminous device Download PDFInfo
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- CN1536413A CN1536413A CNA2004100085241A CN200410008524A CN1536413A CN 1536413 A CN1536413 A CN 1536413A CN A2004100085241 A CNA2004100085241 A CN A2004100085241A CN 200410008524 A CN200410008524 A CN 200410008524A CN 1536413 A CN1536413 A CN 1536413A
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Abstract
Provided is a new technical means for relaxing a lamp image while preventing luminance degradation. This light emitting device (1) composed by installing a lamp (3) behind its light emitting surface is equipped with: diffusion films (11 and 13) used as blurring parts for blurring the lamp image by diffusing light from the lamp (3) to a level leaving the lamp image; and lens parts (12b and 14) for increasing the number of the blurred lamp images in the surface direction by lenses.
Description
Technical field
The invention relates to light-emitting device of full run-down type back side light that a kind of liquid crystal indicator is used etc. and the method that alleviates the lamp image of light-emitting device.
Background technology
The back side light that liquid crystal indicator comprises liquid crystal panel and shines liquid crystal panel.As back side light, be the full run-down type back side light that is constituted by disposing several cold cathode fluorescent lamp behind at diffuser plate.Aforementioned diffuser plate is the white plate of sneaking into several millimeters thick that diffusant forms.
For full run-down type back side light, the light that sends from cold cathode fluorescent lamp is spread to obtain planar light-emitting area in diffuser plate.
When the light that sends from fluorescent tube when the diffuser plate, utilize the diffusant that diffuser plate inside has and make the light diffusion.
Again, diffuser plate has several millimeters thickness usually, when light passes through so thick diffuser plate, because the diffusion of diffusant is very big, can alleviate lamp image effectively.
Again, traditional diffuser plate is configured to lower transmittance, and the light that sends from fluorescent tube does not reflect and absorbs at diffuser plate, can be suppressed at the fluorescent tube lightness of position in the above, very high diffusion is also arranged simultaneously, to obtain reasonable luminescent quality.
So, traditional full run-down type back side light, in order to obtain the planar light-emitting area that cold cathode fluorescent lamp became by linear light source, diffuser plate is integral.
Again, for diffuser plate, under the inconvenient situation of the elimination of lamp image, though there for example have the spy open the 2002-313103 communique to be such, hide light by the position of light curtain (lighting curtain) on fluorescent tube, making the light in light-emitting area that obtains have homogeneity, still is necessary at this situation diffuser plate still.
For the diffuser plate that is provided with, be integral obtaining on the desired luminescent quality, but the shortcoming that causes luminescence efficiency low is arranged.
In other words, for diffuser plate, because the light that sends from fluorescent tube is not reflected and is absorbed so that good luminescent quality is arranged at diffuser plate, but its briliancy can descend, and luminescence efficiency worsens.Particularly utilize the diffusant in diffuser plate because the absorption of light causes luminescence efficiency low.
Again, increase though consider the quantity that makes fluorescent tube, to improve briliancy and the distance of dwindling between the adjacent fluorescent tube, make the briliancy lifting and alleviate lamp image, the increase of fluorescent tube quantity can cause the increase of power consumption.
Summary of the invention
In view of this, purpose of the present invention is exactly new technology and the means that prevent that briliancy is low and alleviate lamp image providing.
The light-emitting device of the present invention the 1st embodiment is characterised in that, disposes behind in the light-emitting device of fluorescent tube in light-emitting area, comprises a fuzzy portion, with so that the degree of the residual lamp image of sending from fluorescent tube of light institute is at random, to blur lamp image; And a lens section, with will be by the quantity of this fuzzy lamp image, making in the face direction by lens increases.
At the 1st embodiment of the present invention, utilize the fuzzy portion that is become by diffusion barrier sheet etc., the light that sends from fluorescent tube residual lamp image can moderately spread, the light and shade of lamp image is by obfuscation.
Then, light and shade is utilized the lens of lens diaphragm etc. to be increased by dispersion in the direction of face by the quantity of the lamp image of obfuscation.Consequently on light-emitting area, show the lamp image of Duoing than actual fluorescent tube quantity.
Therefore, under the situation of simple increase fluorescent tube quantity, can obtain the effect of clearing up to lamp image.
And, utilize fuzzy portion at the fuzzy state of light and shade border quilt, lamp image is divided into several, make the light-emitting area homogenising easily.
More, traditional lens diaphragm, overlapping in order to light harvesting above diffuser plate, can't simply increase the quantity of lamp image as described above.Under the combination of traditional diffuser plate and lens diaphragm, the light that sends from fluorescent tube is under the state that lamp image is alleviated utilizing diffuser plate to be spread fully, to incide lens diaphragm.At this moment, though diffuser plate has alleviated lamp image, because light diffusion on comprehensive, reduce light-emitting area in positive briliancy that the front manifested.Lens diaphragm is with so that positive briliancy promotes, make diffusion light to the frontal light harvesting.
On the other hand,,, be incident in light, lamp image is had by the degree of obfuscation as the lens diaphragm of lens of the present invention though can adopt lens diaphragm as lens of the present invention.In this situation, kept rectilinearity from the light that fluorescent tube sends, when light scioptics diaphragm so, can know that seeing lamp image is dispersed into several.
Again, the present invention the 2nd embodiment is characterized by at the light-emitting area tectosome and disposes behind in the light-emitting device of linear light source, comprises one the 1st diffusion barrier sheet, can make the direct sunshine incident of sending from this linear light source; One the 1st lens face is configured in to allow and passes through from the next light of the 1st diffusion barrier sheet, and is formed several outstanding bars that slightly extend in parallel with this linear light source; One the 2nd diffusion barrier sheet is configured in the light that sends from the facial side of this lens is passed through.
The 1st diffusion barrier sheet is diaphragm, is that several millimeters diffuser plate is different with thickness, and it has lamp image by fuzzy degree, and does not reach the purpose that alleviates lamp image.Then, the light that penetrates from the 1st diffusion barrier sheet utilizes lensing on the direction vertical with the linear light source length direction lamp image to be disperseed in the 1st lens face.Utilize the 1st diffusion barrier sheet, increase by the lamp image of obfuscation, the interval between the lamp image is diminished, the situation that fluorescent tube quantity is increased upwards promotes the homogeneity of light-emitting area.Further, utilize fuzzy light, uniformity of light is upwards promoted again by the 2nd diffusion barrier sheet.Without diffuser plate, make 2 diffusion barrier sheets overlapping haply, have some difficulties though alleviate lamp image, because the lens face between two diffusion barrier sheets, can alleviate the lamp image that the light (not via diffuser plate) that sends from fluorescent tube directly is incident in the 1st diffusion barrier sheet.
Utilize above-mentioned for lamp image is fully alleviated with the situation that requires to make luminescent quality upwards to promote under, be configured to make the light that comes from above-mentioned the 2nd diffusion barrier sheet to pass through, and preferably also possess and have and rough the 2nd lens face that extends in parallel formed several outstanding bars of the outstanding bar of the 1st lens face.Utilize the 2nd lens face, be increased in the linear light source vertical direction on the quantity of lamp image, the same with the situation that a lot of fluorescent tubes are arranged, promote the homogeneity of light-emitting area.So, utilize obfuscation to come back operations with the quantity that increases lamp image, can make progress further promotes luminescent quality.
Again, the present invention the 3rd embodiment, be to it is characterized by at the light-emitting area tectosome to dispose behind on the light-emitting device of linear light source, above-mentioned light-emitting area tectosome is constituted by being stacked with several planar material, wherein these planar material comprises: fuzzy portion is with so that at random from the degree of the residual lamp image of light institute that linear light source sends, to blur lamp image; And lens face, be configured in and make the position of passing through from the light of this fuzzy portion, and be formed with several outstanding bars and this linear light source is rough extends in parallel, this lens face for the thickest, is to form by hold the tabular transparent material that rigidity guarantees in this light-emitting area tectosome in this planar material.In this case, utilize, can promote luminescent quality by the obfuscation of fuzzy portion gained and increase lamp image quantity by the lens section gained.Also have, traditionally because utilize the diffuser plate of number millimeters thick to keep the rigidity of light-emitting area, the light loss that is caused by diffusant is very big, in the present invention, because it is transparent keeping portion's material of rigidity, for the degree of number millimeters thick, the absorption that does not have owing to light causes damage haply, has good illumination efficiency.
So above-mentioned fuzzy portion preferably adopts diffusion barrier sheet.
The present invention the 4th embodiment is to dispose behind in the light-emitting device of fluorescent tube in order to alleviate the method for lamp image in light-emitting area, it is characterized in that comprising make the light that sends from fluorescent tube the degree of residual lamp image at random, with fuzzy lamp image; Will be by the quantity of the lamp image of obfuscation, making on the direction of face by lens increases, to alleviate the lamp image in light-emitting area.Can promote the luminescent quality of light-emitting area by the increase fuzzy and quantity of lamp image.
Description of drawings
Fig. 1 illustrates the summary section according to the light-emitting device of the embodiment of the invention.
Fig. 2 illustrates the key diagram of the light peptizaiton of utilizing lens.
Among Fig. 3, (a) the refraction synoptic diagram of the light of the A position that illustrates at Fig. 2, the two-fold reflection synoptic diagram of the light of the B position that figure (b) illustrates at Fig. 2, the refraction synoptic diagram of the light of the C position that figure (c) illustrates at Fig. 2.
Symbol description
1 light-emitting device
2 shells
3 fluorescent tubes (linear light source)
4 light-emitting area tectosomes
11 the 1st diffuser plates (the 1st fuzzy portion)
12 transparent panels (the 1st lens face)
12b the 1st lens section
13 the 2nd diffuser plates (the 2nd fuzzy portion)
14 lens diaphragms (the 2nd lens section; The 2nd lens face)
Embodiment
Below, according to drawing explanation preferred embodiment of the present invention.
Fig. 1 illustrates the light-emitting device 1 of the full run-down type back side light of using as liquid crystal indicator.Light-emitting device 1 is by having in light-emitting area in the shell 2 that is formed opening fluorescent tube 3 to be set, and constitutes at preceding note opening part configuration light-emitting area tectosome 4.By the light that the light-emitting area tectosome sends, shine in the drawings the not liquid crystal panel place of expression.
Again, the full run-down type back side light that liquid crystal indicator is used requires slimming, high briliancyization etc.
Shell 2 is the side surface part 2b that set up from each limit of 2a, bottom surface of rectangle, to form the box shape of top opening.The inside of shell 2 is laid with reflection diaphragm 5.Utilize reflection diaphragm 5,, constitute in order to make the light that sends from fluorescent tube 3 reflecting surface to 4 reflections of light-emitting area tectosome at the inner face of shell 2.
Fluorescent tube 3 is made of linear light source, specifically is made of cold cathode fluorescent lamp.Fluorescent tube 3 disposes several in shell 2, and each fluorescent tube 3 is being configured of being parallel to each other.So, intersect vertically at the length direction and the paper of the fluorescent tube 3 of Fig. 1.
Light-emitting area tectosome 4 is made of several planar material 11,12,13,14 stacked institutes.In planar the material, be provided with transparent panel 12 as the thickest material.The thickness of this transparent panel 12 is about 1～3mm, is preferably about 2mm.Planar material 11,13,14 beyond the transparent panel 12 is individually the matrix shape, and concrete thickness is below 0.25mm.
Chaffy planar material the 11,13, the 14th is positioned at the opening part of shell 2, do not have to prevent the rigidity of the bending of light-emitting area tectosome 4.To this, the thickest transparent panel 12, identical with traditional diffuser plate, to have in order preventing and to guarantee as the rigidity of the bending of light-emitting area.Transparent panel 12 can be acrylic acid, polycarbonate or cyclic olefin polymer (ProductName: Zeonor is produced by Japanese ZEON company) etc., have high transparent, at high temperature (about about 80 ℃) can keep resin of stable shape down.Also have, transparent panel 12 also can be a glass.
Transparent panel 12 though hold the thickness of this degree, because transparent, does not have light loss by its inner light haply.To this, holding the diffuser plate that rigidity guarantees traditionally is milky, because the light absorption of diffusant etc. has many losses.Because adopt the transparent panel 12 of present embodiment, under the situation that rigidity is guaranteed, can prevent the loss of light.
For transparent panel 12, and at the relative exiting surface 12b of the incidence surface 12a of fluorescent tube 3 sides, be formed with the 1st lens section.This 1st lens section 12b has several outstanding bars.The section of outstanding bar is triangle or semicircle, and the direction that intersects vertically with Fig. 1 paper prolongs and form projection.Prominent shape is that this length direction is approximately parallel towards the length direction of fluorescent tube 3.At Fig. 1,, be described with bigger prominent shape, and be actually very fine for easy understanding again.
As above-mentioned, transparent panel 12 by planar material holding lens, constitutes as lens are facial.So,,, be example with triangle (prism) for the section configuration of outstanding bar at Fig. 1.The 1st lens section 12b can be integrally formed with transparent panel 12, also can utilize UV hardening resin etc. by the transparent panel 12 that does not have lens, and the lens section (lens diaphragm) that other approach is formed engages.
Lens section 12b is divided into several in the lamp image of light-emitting area in the face direction.Lamp image is to be separated at the direction D that the outstanding bar length direction with lens section 12b intersects vertically.Because the outstanding bar of the 1st lens section 12b towards with the equidirectional of the length direction of wire fluorescent tube 3, the wire lamp image of corresponding each fluorescent tube 3 is divided into 2 at the direction D that intersects vertically with the fluorescent tube length direction.Therefore, diminish equally with fluorescent tube spacing L1 when the multiplication of the quantity of fluorescent tube 3, because of lamp image quantity doubles, the spacing of each lamp image can diminish.
Fig. 3 describes for principle that the quantity to the lamp image of Fig. 2 increases, and its principle is following consideration.The B position of Fig. 2 (the superincumbent position of fluorescent tube) shown in Fig. 3 (b), directly arrives the light of lens section 12b from fluorescent tube 3, and the face of lens section 12b approximately intersects vertically relatively, so only utilizes outstanding bar (prism) with the two-fold reflection and be difficult to penetrate.On the one hand, difference A, C position from the superincumbent position B of fluorescent tube to the D direction are shown in Fig. 3 (a), 3 (c), because the complications of outstanding bar (prism) penetrate towards frontal.Consequently can show lamp image in A, C position.From the light that a fluorescent tube 3 sends, can show 2 lamp image.Again, because the dispersion of lamp image, the lightness of each lamp image is low, and the light and shade missionary society of light-emitting area diminishes.
Traditional full run-down type back side light, though use the lens diaphragm that has as lens, lens diaphragm at traditional full run-down type back side light, also can be described as the diaphragm that promotes briliancy, it is used is in order to make the light by the diffuser plate diffusion, at frontal (normal direction of diffuser plate) light harvesting, and the briliancy of lifting frontal, but be not to be used for lamp image is disperseed.Moreover, traditionally, before light incident lens diaphragm, only uniform according to diffusion of diffuser plate etc.Therefore, in A, B, the C position of Fig. 2, can all produce diffusion light in light-emitting area.For lens diaphragm, the light of omnirange diffusion is owing to the complications effect [complications of Fig. 3 (a), 3 (b)] of lens diaphragm, to the frontal light harvesting.Therefore, lens diaphragm has the light harvesting function, but does not disperse the function of lamp image.
On the other hand, the full run-down type back side light of present embodiment, because the light that sends from fluorescent tube 3 is kept its rectilinearity, can residual lamp image and be incident in the light of lens section 12b, lens section 12b is regarded as disperseing the function of lamp image.
The incidence surface 12a side of transparent panel 12 disposes the 1st diffusion barrier sheet 11.The 1st diffusion barrier sheet 11 is among planar the material 11,12,13,14 that constitutes light-emitting area tectosome 4, the initial incident of light of sending from fluorescent tube 3, be configured in the most close fluorescent tube 3 sides.For the 1st diffusion barrier sheet 11, from the direct sunshine that fluorescent tube 3 sends, can spread at random, with the lamp image obfuscation.In other words, the 1st diffusion barrier sheet 11 uses as fuzzy portion.But, owing to the extremely thin cause of diffusion barrier sheet, there is not as thick diffuser plate, to have the diffusion of very strong elimination lamp image, lamp image will residually be arranged.
As the 1st diffusion barrier sheet 11, very high mist (haze) value is preferably arranged, concrete mist value is being good more than 80%.As diffusion barrier sheet 11 so, BS-04, the #100-KBS2 that can adopt favour and (strain) to make, 100GM2,188GM2 that KIMOTO (strain) makes, the D117UEY of TSUJIDEN (strain) system or D120 etc.
So, for the fuzzy ability of reinforcement the 1st diffusion barrier sheet 11, on the incidence surface 12a of transparent panel 12, form fine concavo-convex, by this concavo-convex lamp image of bluring.The micro concavo-convex of transparent panel 12 can be for the scope in order to the corresponding incidence surface 12a of the moulding mould that forms transparent panel 12, and it is fine concavo-convex to utilize sandblast to form.Other for as the fuzzy portion that is arranged at transparent panel 12, except concavo-convex, can adopt the white point printing to incidence surface 12a, and the coating of diffusion pearl can be adopted the adhesion with diffusion portion material.Again, when only adopting the incidence surface 12a conduct that is arranged at transparent panel 12 to blur portion, the 1st diffusion barrier sheet can omit.
Utilize fuzzy portion to make the light and shade difference of lamp image be incident in aforementioned the 1st lens section 12b,, only utilize and disperse lamp image, also can make the light-emitting area homogenising because its 1st lens section 12b is divided into several with the lamp image of obfuscation at the light of fringe.
So, utilize between hyaline layer, because the existence of this hyaline layer from the transparent panel 12 fuzzy 11 to the 1st lens section 12b of portion, light by 11 diffusions of fuzzy portion, when arriving the 1st lens section 12b, can delay, can increase fog-level in the position of face direction.
Under the less situation of the distance between several fluorescent tubes 3, with bigger situation of distance from fluorescent tube 3 to light-emitting area tectosome 4 etc., can not weaken under the situation of lamp image, utilize above-mentioned the 1st diffuser plate 11 can obtain good luminescent quality with transparent panel 12.But, for example of the present invention, because bigger (about 25mm) that the distance L between the fluorescent tube 31 keeps, 2 of the distance L between the bottom of reflecting surface 5 and the light-emitting area tectosome 4 smaller (about 10mm), it is stronger that lamp image manifests.Therefore, by the described later the 2nd fuzzy portion and the 2nd lens section, can obtain good luminescent quality.
Particularly, in the exiting surface 12b of transparent panel 12 side, dispose the 2nd diffusion barrier sheet 13.Light penetrating from the 1st lens section 12b incides the 2nd diffusion barrier sheet 13.This 2nd diffusion barrier sheet 13 is identical with the 1st diffusion barrier sheet 11, and the fuzzy portion fuzzy as the light and shade that makes lamp image uses.Because this 2nd diffusion barrier sheet 13 is set, can promote the homogenising of light.As this 2nd diffusion barrier sheet 13, high fuzzy value is better, and more concrete is that fuzzy value is preferably in more than 80%.So diffusion barrier sheet 13, BS-04, the #100-KBS2 that can adopt favour and (strain) to make, 100GM2,188GM2 that KIMOTO (strain) makes, the D117UEY of TSUJIDEN (strain) system or D120 etc.
On the 2nd diffusion barrier sheet 13, more dispose lens diaphragm (rib type diaphragm) 14.Light by the 2nd diffusion barrier sheet 13 penetrates is incident in lens diaphragm 14.At present embodiment, the 2nd diffusion barrier sheet 13 is positioned at last as planar the material that makes light uniformization among light-emitting area tectosome 4.Lens diaphragm 14, being configured to make the face that is formed lens is bright dipping side (upside of Fig. 1).Lens diaphragm 14 for section is triangle or semicircular several outstanding bars, is formed abreast with the length direction of fluorescent tube 3 and the outstanding treaty of the 1st lens section 12b.So, lens diaphragm 14 is constituted as the 2nd lens face (the 2nd lens section) by having planar material of lens.The 2nd lens section is used as lens diaphragm 14, for example can adopt the BEFII90/50 of 3M system, or with BEFII90/50 of corporate system etc.
The 2nd diffusion barrier sheet 13 of the 2nd fuzzy portion, and the 2nd lens diaphragm 14 of the 2nd lens section is the result who has identical function respectively with the 1st diffusion barrier sheet 11 and the 1st lens section 12b.In other words, utilize the 2nd diffusion barrier sheet 13, carry out the obfuscation of lamp image, will be dispersed into several by the lamp image of obfuscation by the 2nd lens diaphragm 14.The quantity of lamp image is consequently howed much than the quantity of actual fluorescent tube 3, part or all of dispersed each lamp image overlaps with other lamp image, to obtain uniform lightness.So, by carrying out the dispersion of some times lamp image, can increase the quantity of lamp image at an easy rate, and luminescent quality is got a promotion according to lens section.But, only simply increase the quantity of lamp image, can residually there be very strong light and shade poor, for will eliminate its diffuser plate the strong diffusion of one degree being arranged probably is necessary, for the dispersion of lamp image and the obfuscation of lamp image are combined, under the state that the light and shade difference is lowered, increase the quantity of lamp image, obtain homogeneous light emitting area easily.
Again; aforementioned planar material 11,12,13,14 as shown in Figure 1; though be for making the homogenising of light; as light-emitting area tectosome 4; one side is protection the 2nd lens diaphragm 14 (being the 1st lens section 12b) under the situation that does not have the 2nd lens diaphragm 14; with for the angle of broadening one's vision is a purpose, also can comprise other optical sheet.Under the occasion of protection lens, for example can adopt the diffuser plate [for example PSS-010, the #100-BMU4S etc. of favour and (strain) manufacturing] of low fuzzy value as the protection diaphragm.When the angle of broadening one's vision, its protection diaphragm can adopt high (fuzzy value is 30%～50%) diffusion sheet of fuzzy value [125TL4 that for example #100-BMU4S, the PBS-060 that make of favour and (strain), or KIMOTO (strain) makes etc.].
Embodiment
At full run-down type back side light shown in Figure 1, shell 2 is the aluminium of thickness 1.0mm, fluorescent tube 3 is cold cathode fluorescent lamp of diameter 3mm, reflection diaphragm 5 is E60V of Toray system, the 1st diffusion barrier sheet 11 is BS-04 that favour and (strain) are made, transparent panel 12 is acrylic acid transparent panels of thick 2mm, the incidence surface 12a of transparent panel 12 is the male and fomale(M﹠F)s that formed by sandblast, the exiting surface 12b of transparent panel 12 is that drift angle is 100 ° the outstanding bar of triangle, the width of each outstanding bar (leg-of-mutton bottom side length) is the prism facets of 70 μ m, the 2nd diffusion barrier sheet 13 is BS-04 that favour and (strain) are made, lens diaphragm 14 is BEFII90/50 of 3M system, fluorescent tube spacing L1 is 25mm, distance L 2 between light-emitting area tectosome 4 (the 1st diffusion barrier sheet 11) and the reflecting surface 5 is 10mm, utilize the luminescent quality of light-emitting area tectosome 4 resulting light-emitting areas to observe, to measure briliancy by visual.
For the full run-down type back side light that uses the conventional diffusion plate, when L2 is difficult to be alleviated in the following lamp image of the degree of 10mm,, just can't obtain good luminescent quality though L2 is not more than the degree of 16mm, at present embodiment, L2 is 10mm or also can obtains good luminescent quality forr a short time.Moreover the uniformity of light height can be identified.Also have, because do not use diffuser plate or light curtain, its light loss is few, and is become by little L2, can obtain 7500cd/m
2High briliancy.
As above-mentioned, present embodiment can reach slimming, good luminous quality and high briliancy.
So the present invention is by being not limited to above-mentioned example, and other all variation can be arranged.For example, do not need at the light-emitting area tectosome under the situation of rigidity, transparent panel 12 also can change over lens diaphragm.In this occasion, constituted by the thin light-emitting area tectosome about about 1mm, can bring into play very strong light uniformization effect though approach.
Also have, light-emitting device of the present invention does not limit use at liquid crystal indicator, and can be used in film viewer or illuminated billboard etc. yet.
Claims (6)
1. light-emitting device, fluorescent tube are configured in light-emitting area behind, comprising:
A fuzzy portion is with so that at random from the degree of the residual lamp image of light institute that fluorescent tube comes, to blur lamp image; And
A lens section, with will be by the quantity of this fuzzy lamp image, making in the face direction by lens increases.
2. light-emitting device, linear light source is configured in the behind of light-emitting area tectosome, comprising:
One the 1st diffusion barrier sheet can make the direct sunshine incident of being sent by this linear light source;
One the 1st lens face is configured in to allow and passes through from the next light of the 1st diffusion barrier sheet, and is formed with several outstanding bars that slightly extend in parallel with this linear light source; And
One the 2nd diffusion barrier sheet is configured in the light incident that can make to come from the facial side of these lens.
3. light-emitting device as claimed in claim 2 is characterized in that, more comprises one the 2nd lens face, and configuration can be passed through the light that comes from the 2nd diffusion barrier sheet side, and is formed with several outstanding bars that slightly extend in parallel with this linear light source.
4. light-emitting device, linear light source is configured in the behind of light-emitting area tectosome, it is characterized in that:
This light-emitting area tectosome is made of several stacked planar material, and wherein those planar material comprises:
A fuzzy portion, with so that the light that sends from linear light source the degree of residual lamp image at random, with fuzzy lamp image; And
A lens face is configured in the position that the light that sends from this fuzzy portion one side passes through, and is formed with several outstanding bars and this linear light source is rough extends in parallel;
This lens face for the thickest, is formed by holding the tabular transparent material that rigidity guarantees in above-mentioned light-emitting area tectosome in this planar material.
5. the light-emitting device described in claim 1 or 4, this fuzzy portion is a diffusion barrier sheet.
6. a method that alleviates lamp image is used for fluorescent tube and is configured in light-emitting area light-emitting device behind, comprising:
Make the light that sends from fluorescent tube the degree of residual lamp image at random with fuzzy lamp image; And
To by lens its direction at face be increased, to alleviate lamp image by the quantity of the lamp image of obfuscation in light-emitting area.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2003107894 | 2003-04-11 | ||
| JP2003107894A JP2004319122A (en) | 2003-04-11 | 2003-04-11 | Light emitting device, and lamp image relaxation method in light emitting device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1536413A true CN1536413A (en) | 2004-10-13 |
| CN1318898C CN1318898C (en) | 2007-05-30 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2004100085241A Expired - Fee Related CN1318898C (en) | 2003-04-11 | 2004-03-11 | Luminous device and method of reducing fluorescent tube image of luminous device |
Country Status (3)
| Country | Link |
|---|---|
| JP (1) | JP2004319122A (en) |
| CN (1) | CN1318898C (en) |
| TW (1) | TWI298812B (en) |
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| US5986728A (en) * | 1997-07-23 | 1999-11-16 | Litton Systems, Inc. | Optically enhance day/night liquid crystal display backlight with TIR lens and both light sources on same side of waveguide |
| JP2001004998A (en) * | 1999-06-24 | 2001-01-12 | Nec Corp | Liquid crystal display device |
| JP2002049324A (en) * | 2000-07-31 | 2002-02-15 | Nippon Seiki Co Ltd | Back light device |
| JP2002049326A (en) * | 2000-08-02 | 2002-02-15 | Fuji Photo Film Co Ltd | Plane light source and display element using the same |
| JP2002313103A (en) * | 2001-04-17 | 2002-10-25 | Ohtsu Tire & Rubber Co Ltd :The | Luminaire |
-
2003
- 2003-04-11 JP JP2003107894A patent/JP2004319122A/en active Pending
-
2004
- 2004-01-29 TW TW93101924A patent/TWI298812B/en active
- 2004-03-11 CN CNB2004100085241A patent/CN1318898C/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101191957B (en) * | 2006-11-30 | 2011-08-10 | 乐金显示有限公司 | Liquid crystal display device and fabricating method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| TW200420978A (en) | 2004-10-16 |
| CN1318898C (en) | 2007-05-30 |
| TWI298812B (en) | 2008-07-11 |
| JP2004319122A (en) | 2004-11-11 |
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