CN100470327C - Light diffusing/collecting member and surface light source device using the same - Google Patents
Light diffusing/collecting member and surface light source device using the same Download PDFInfo
- Publication number
- CN100470327C CN100470327C CNB200510126100XA CN200510126100A CN100470327C CN 100470327 C CN100470327 C CN 100470327C CN B200510126100X A CNB200510126100X A CN B200510126100XA CN 200510126100 A CN200510126100 A CN 200510126100A CN 100470327 C CN100470327 C CN 100470327C
- Authority
- CN
- China
- Prior art keywords
- diffusion
- layer
- mentioned
- optically focused
- light source
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Images
Landscapes
- Planar Illumination Modules (AREA)
- Optical Elements Other Than Lenses (AREA)
- Liquid Crystal (AREA)
Abstract
A light diffusion/collecting member and a surface light source device can be provided with a simple configuration soas to achieve an easy assembly process and weight reduction. The surface light source device can include light sources arranged within the same plane, and a flat light diffusion/collecting member arranged above the light sources. The light diffusion/collecting member can be composed of a diffusion layer having a diffusion function, a low refractive layer, and a light collecting layer having a light collecting function. These layers can be integrally stacked in this order such that the diffusion layer is the nearest to the light sources. The low refractive layer can be made of a material with a lower refractive index than those of the materials composing the diffusion layer and the light collecting layer.
Description
Technical field
The present invention relates to be used for for example transmission display units such as liquid crystal panel being carried out the planar light source device of back lighting.
Background technology
In the past, transmission display units such as liquid crystal panel showed in order to obtain bright more picture, and used planar light source device to throw light on from the back side.Especially for the color liquid crystal panel of PC and liquid crystal TV set, because the aperture opening ratio of driving circuit is restricted, and light transmission rate reduces because of color filter, so must use the back lighting of planar light source device.
Generally speaking, the planar light source device used of this back lighting is divided into so-called side edge type and full run-down type according to configured light sources.And especially for the planar light source device that for example large-scale display device of the large-scale tv machine more than 20 inches is carried out back lighting, many employings do not need light guide plate, realize light-weighted full run-down type easily by forming hollow structure.
This full run-down type planar light source device is for example by formation shown in Figure 7.
In Fig. 7, planar light source device 1 is by constituting with the lower part: at least one, illustrated case is four linear light source 2; Be configured in the reflecting surface 3 of each linear light source 2 belows; Be configured in diffuser plate 4, diffusion sheet 5, the prismatic lens 6 of linear light source 2 and reflecting surface 3 tops successively.
Above-mentioned linear light source 2 for example can utilize formations such as cold-cathode tube, mutually with equal intervals configured in parallel arranged side by side, so that whole light-emitting area A irradiates light upward.
Above-mentioned reflecting surface 3 for example constitutes the diffusely reflecting surface of being realized by white spraying or Foamex sheet etc., is configured in the below of each linear light source 2, makes from the linear light source 2 directives below or the wide of side of correspondence to cause to the top reflection as exit direction.
Above-mentioned diffuser plate 4 for example is formed with light diffusion by the surface and constitutes with the light transmission sheet material of pattern.
Above-mentioned diffusion sheet 5 adds the mixed light diffusant and makes in as the resin of base material; for example, the light diffusing agent by adding mixed calcium carbonate and titanium dioxide etc. in polycarbonate resin, partial cross-linked polymer particles or insoluble propylene polymer close that element, titanium dioxide and silicon compound form.
And above-mentioned prismatic lens 6 is for example in order to make the surface have micro prisms, utilizes at least that transparent methods such as resin (for example acryl resin, polycarbonate etc.) injection moulding, 2P method or compression molding form in the visible region.
Planar light source device 1 according to such formation, when each linear light source 2 bright lamps, the light that penetrates from each linear light source 2 directly or after face 3 reflections that are reflected is spread by the diffuser plate 4 of top, is spread by diffusion sheet 5 again, and, penetrate towards the top then by prismatic lens 6 optically focused.
Thus, the various display device (not shown) that are configured in the liquid crystal panel etc. of light-emitting area A top are implemented back lighting.
At this moment, the light that penetrates from each linear light source 2 spreads respectively or optically focused, thereby obtains even brightness back lighting on the whole when seeing through diffuser plate 4, diffusion sheet 5 and prismatic lens 6.
But, patent documentation 1 disclosed liquid crystal indicator with backlighting arrangement, its backlighting arrangement is by constituting with the lower part: a plurality of linear light sources that dispose arranged side by side in parallel to each other; Be configured in the semicircle tubular reverberator of each linear light source below; Configuration diffuser plate above it; With optical thin film with light diffusion or light-focusing function.
According to this structure, each linear light source and corresponding reverberator constitute one, and formation can be by sliding and the structure of dismounting in the longitudinal direction.Thus, can easily carry out the replacing of linear light source.
And patent documentation 2 discloses by the lighting device that constitutes with the lower part: a plurality of linear light sources that dispose arranged side by side in parallel to each other; Configuration reflecting plate thereunder; Configuration diffuser plate above it; Be disposed at the diffusion sheet and/or the prismatic lens of its top again.
According to this structure, above above-mentioned diffuser plate, be provided with the gap, perhaps make the closely upper surface of the above-mentioned diffuser plate of contact of diffusion sheet and/or prismatic lens, and make the closely lower surface of the above-mentioned diffuser plate of contact of light transmission piece.Thus, the upper and lower surface of above-mentioned diffuser plate directly contacts extraneous gas or is sealed, thereby can not produce temperature, the psychrometric difference of upper and lower surface, so above-mentioned diffuser plate can not be deformed into concavity or convex in the top relatively.Therefore, can suppress to produce the brightness disproportionation of back lighting because of the distortion of diffuser plate.
11-No. 002813 communique of patent documentation 1 Japanese kokai publication hei
11-No. 223812 communiques of patent documentation 2 Japanese kokai publication hei
But, in planar light source device in the past 1 for example shown in Figure 7,, need diffuser plate 4, diffusion sheet 5, and need prismatic lens 6 in order to improve brightness in order to make from the diffusion of the light of linear light source 2 and to obtain uniform brightness.
Therefore, dispose these diffuser plates 4, diffusion sheet 5 and prismatic lens 6 successively above linear light source 2, cause number of components to increase, assembly process complicates, and cost improves.
In addition, above-mentioned diffuser plate 4 generally is made of the resin plate about 2～3mm, because number of components increases, particularly when being used as the back lighting of large-scale display device, weight increases, and runs counter to the lightweight requirements of display device self.
To this, in the back light for liquid crystal display device lighting device of above-mentioned patent documentation 1, above diffuser plate, dispose optical sheet, this optical sheet only merely is layered in the top of diffuser plate, so cause number of components to increase equally.
And, in the lighting device of above-mentioned patent documentation 2, configuration diffusion sheet and/or prismatic lens above diffuser plate, these diffusion sheets and/or prismatic lens be devices spaced apart configuration or the closely contact in order not contact extraneous gas above diffuser plate, but can not form as one with diffuser plate.
Therefore, in the lighting device of these patent documentations 1 and patent documentation 2, cause number of components to increase equally, assembly process complicates, and cost is improved, and weight is increased.
In addition, the purpose of devices spaced apart configuration diffusion sheet and/or prismatic lens is to make the environmental baseline of relative diffusion plate upper surface and lower surface identical above diffuser plate, prevents that above-mentioned diffuser plate is deformed into convex or concavity because of temperature difference and psychrometric difference.
In addition, even these optical thin films or diffusion sheet and/or prismatic lens are sticked on the diffuser plate, perhaps use roughly the same refractive index materials, make the double-deck optical sheet that constitutes by diffusion layer and layers of prisms be configured as one, the light-focusing function that also can suppress prism, but the meaning that the result causes giving prism shape reduces.
To this, can improve light-focusing function though reduce the concentration of the diffusant that contains in the diffusion layer,, cause diffusion function to reduce thereupon.
Summary of the invention
The present invention In view of the foregoing proposes, and its purpose is, a kind of diffusion optically focused parts and planar light source device that utilizes simple structure can easily obtain lightweight structure is provided.
Above-mentioned purpose reaches by first mode of the present invention, a kind of top that is configured in the light source of flat, configuration, constitute the diffusion optically focused parts of the general planar of planar light source device, it is characterized in that, above-mentioned diffusion optically focused parts begin successively to be made of integratedly the diffusion layer with diffusion function, low-index layer and light collecting layer with light-focusing function from light source side, and above-mentioned low-index layer is made of refractive index ratio diffusion layer and the low material of light collecting layer.
In this first mode, the light that incides diffusion layer from the below is spread reliably by this diffusion layer, and because on diffusion layer, disposed low-index layer, therefore the light that incides low-index layer above above-mentioned diffusion layer is because refractive index poor, can give full play to the diffusion function of diffusion layer thus to the emergence angle dispersal direction refraction bigger than incident angle.
And, see through low-index layer and incide the light of light collecting layer equally with bigger incident angle incident, so give full play to its light-focusing function equally.
Therefore, by keep in the past diffusion layer and independently in the diffusion function and light-focusing function of light collecting layer, making these diffusion layers and light collecting layer clip low-index layer forms as one, can make them form parts, so number of components reduces, assembling is simple, and component costs and assembly cost reduce.
Thus, utilization will be spread the simple structure that the optically focused parts are configured in above the light source can constitute planar light source device, and the number of components that constitutes planar light source device reduces, and assembly process becomes simple, component costs and assembly cost reduce, and planar light source device can form lightweight structure on the whole.
Diffusion optically focused parts according to second mode of the present invention, it is characterized in that, in the diffusion optically focused parts of aforementioned first mode, above-mentioned low-index layer by refractive index ratio constitute the base material of above-mentioned diffusion layer and light collecting layer low, be that transparent medium constitutes in the visible region at least.
In this second mode, the low-index layer that transparent medium, for example resin, glass, air by low-refraction constitute is set between diffusion layer and light collecting layer, constitute the diffusion optically focused parts of three-decker thus easily.
Diffusion optically focused parts according to Third Way of the present invention is characterized in that, in the diffusion optically focused parts of aforementioned second mode, above-mentioned low-index layer is the airtight hollow bulb that limits between above-mentioned diffusion layer and light collecting layer.
In this Third Way, constitute low-index layer by the hollow bulb that limits between diffusion layer and the light collecting layer, can utilize the diffusion optically focused parts of still less material, lower cost structure three-decker thus.
Above-mentioned purpose reaches by cubic formula of the present invention, a kind of top that is configured in the light source of flat, configuration, constitute the diffusion optically focused parts of the general planar of planar light source device, it is characterized in that above-mentioned diffusion optically focused parts begin to be made of integratedly the light collecting layer with light-focusing function that the rib layer separates predetermined space by the diffusion layer with diffusion function with respect to this diffusion layer successively from light source side.
In this cubic formula, because inciding the light of diffusion layer can be spread reliably by this diffusion layer from the below, and on diffusion layer, disposed the air layer that limits by the rib layer, above above-mentioned diffusion layer, incide the light of air layer thus because the refractive index of air layer is lower than diffusion layer, can reflect to the emergence angle dispersal direction bigger according to the difference of refractive index, give full play to the diffusion function of diffusion layer thus than incident angle.
And, see through air layer and incide the light of light collecting layer equally with bigger incident angle incident, so give full play to its light-focusing function equally.
Therefore, by keep in the past diffusion layer and independently in the diffusion function and light-focusing function of light collecting layer, these diffusion layers and light collecting layer are formed as one across the rib layer, can make them form parts, so number of components reduces, assembling is simple, and component costs and assembly cost reduce.
Thus, utilize and only will spread the simple structure that the optically focused parts are configured in above the light source and can constitute planar light source device, and constitute the number of components minimizing of planar light source device, assembly process becomes simple, component costs and assembly cost reduction.
In addition, diffusion optically focused parts comprise the air layer that is limited by the rib layer, have hollow structure so form, and compare greatly with the diffuser plate in the past that has same thickness on the whole to lighten, thereby planar light source device are realized lightweight structure on the whole.
Diffusion optically focused parts according to the 5th mode of the present invention is characterized in that, in the diffusion optically focused parts of aforementioned cubic formula, above-mentioned rib layer and above-mentioned diffusion layer and light collecting layer constitute one.
In the 5th mode, the diffusion layer, light collecting layer and the rib layer that constitute diffusion optically focused parts constitute one mutually, can form by for example extrusion molding thus.
Diffusion optically focused parts according to the 6th mode of the present invention is characterized in that, in the diffusion optically focused parts of aforementioned cubic formula, above-mentioned rib layer and above-mentioned diffusion layer constitute one, and have pasted independently light collecting layer thereon.
In the 6th mode, rib layer and diffusion layer constitute one, have pasted independently light collecting layer thereon, and diffusion layer and the light collecting layer that disposes with predetermined distance mutually constitutes one easily thus.
Diffusion optically focused parts according to the 7th mode of the present invention is characterized in that, in the diffusion optically focused parts of aforementioned first mode, above-mentioned diffusion layer constitutes by add the resin material that has mixed diffusant or pigment in base material.
In the 7th mode, in base material, add and mix diffusant or pigment, have diffusion function thus.
Diffusion optically focused parts according to all directions of the present invention formula, it is characterized in that, in the diffusion optically focused parts of arbitrary mode of aforementioned first～the 7th mode, above-mentioned light collecting layer is by being that transparent resin material or the mixing diffusant that added extremely low concentration or the resin material of pigment constitute at least in the visible region, and surface and/or lower surface have the optics machining shape that possesses light-focusing function thereon.
Diffusion optically focused parts according to the 9th mode of the present invention, it is characterized in that, aforementioned the from all directions in the diffusion optically focused parts of formula, above-mentioned optics machining shape be the section configuration of the quafric curve of triangle, trapezoidal or para-curve, elliptic arc etc. or their combination with the direction of cross section perpendicular on scan and the prism shape that obtains.
Diffusion optically focused parts according to the tenth mode of the present invention is characterized in that, in the diffusion optically focused parts of aforementioned all directions formula, above-mentioned optics machining shape is the lens arra of small polygonal awl, aspherical shape.
Diffusion optically focused parts according to the 11 mode of the present invention is characterized in that, in the diffusion optically focused parts of aforementioned all directions formula, above-mentioned optics machining shape is to provide by the roughly spheroidal particle that coating is made of transparent materials such as resin or glass.
In the 8th～the 11 mode, the upper surface and/or the lower surface that make transparent material or interpolation mix the resin material of the diffusant of extremely low concentration or pigment have the optics machining shape, thereby has light-focusing function, this optics machining shape is preferably triangle, trapezoidal, or para-curve, the quafric curve of elliptic arc etc., perhaps the section configuration of their combination with the direction of cross section perpendicular on scan and the prism shape that obtains, perhaps small polygon taper, the lens arra of aspherical shape, the perhaps spheroidal particle that constitutes by transparent materials such as resin or glass by the coating shape of giving.
Above-mentioned purpose reaches by the 12 mode of the present invention, and a kind of planar light source device is characterized in that, comprising: the light source of flat, configuration; Be configured in the diffusion optically focused parts of arbitrary mode in aforementioned first～the 11 mode of above-mentioned light source top.
In the 12 mode, by diffusion optically focused parts and the incompatible formation planar light source device of light sources that uses above-mentioned each mode, so number of components reduces, assembling is carried out easily, component costs and assembly cost reduce, and the integral body amount of lightening can realize being suitable for the planar light source device of the back lighting of large-scale display device thus.
As mentioned above, according to the present invention, diffuser plate in the past becomes one mutually with the optics with diffusion function and light-focusing function, constitute parts thus, so component costs and assembly cost reduce, and making up with light source and reflecting surface and constituting under the situation of planar light source device, can when keeping diffusion function and light-focusing function, reduce component costs and assembly cost, and further realize lightweight, so the backlighting arrangement as large-scale display device is used can provide only planar light source device.
Description of drawings
Fig. 1 is the summary section of structure of an embodiment of expression planar light source device of the present invention.
Fig. 2 is the approximate three-dimensional map of outward appearance of the planar light source device of presentation graphs 1.
Fig. 3 is the sectional view of the diffusion optically focused parts that use of the planar light source device of Fig. 1.
Fig. 4 is the summary section of structure of another embodiment of expression planar light source device of the present invention.
Fig. 5 is the approximate three-dimensional map of outward appearance of the planar light source device of presentation graphs 4.
Fig. 6 is the sectional view of the diffusion optically focused parts that use of the planar light source device of Fig. 4.
Fig. 7 is a summary section of representing a routine structure of planar light source device in the past.
Embodiment
Below, describe preferred implementation of the present invention in detail with reference to Fig. 1～Fig. 6.
In addition, below Xu Shu embodiment is a preferred concrete example of the present invention, thus carried out various preferred qualifications technically, still, and short of in the following description special qualification record of the present invention, scope of the present invention just is not limited to these modes.
[embodiment 1]
Fig. 1 and Fig. 2 represent the structure of an embodiment of planar light source device of the present invention.
In Fig. 1 and Fig. 2, planar light source device 10 is by constituting with the lower part: at least one, illustrated case is four linear light source 11; Be configured in the reflecting surface 12 of each linear light source 11 belows; Be configured in the diffusion optically focused parts 13 of linear light source 11 and reflecting surface 12 tops.
Above-mentioned linear light source 11 for example is made of cold-cathode tube etc., is flat with equal intervals configured in parallel arranged side by side mutually, so that whole light-emitting area A irradiates light upward.
Above-mentioned reflecting surface 12 for example constitutes the diffusely reflecting surface that is formed by white spraying or Foamex sheet etc., be configured in the below of each linear light source 11, make from the linear light source 11 directives below or the wide of side of correspondence to cause towards top reflection as exit direction.
Above-mentioned diffusion optically focused parts 13 form the three-decker that is shown specifically among Fig. 3, are made of diffusion layer 14, low-index layer 15 and light collecting layer 16 successively from the below.
Above-mentioned diffusion layer 14 has diffusion function, generally constitutes by add the resin material that has mixed diffusant in base material.
Specifically, above-mentioned diffusion layer 14 adds the resin material that has mixed particulates such as cross-linked poly-methyl methacrylate and forms by being base material with transparent resins such as polycarbonate resins for example.
Above-mentioned light collecting layer 16 by at least in the visible region transparent resin material, for example polycarbonate etc. constitute, surface and/or lower surface are upper surface under illustrated case thereon, have optics machining shape 16a.
This optics machining shape 16a be the section configuration of the quafric curve of triangle, trapezoidal or para-curve, elliptic arc etc. or their combination with the direction of cross section perpendicular on scan and the prism shape that obtains, perhaps small polygon taper, the lens arra of aspherical shape, the perhaps shape that forms by the spheroidal particle that constitutes by transparent materials such as resin or glass of coating.
Relative therewith, above-mentioned low-index layer 15 by refractive index be lower than above-mentioned diffusion layer 14 and light collecting layer 16, transparent medium, preferably airtight air layer constitutes in the visible region at least, in the illustrated case, constitute airtight hollow bulb between above-mentioned diffusion layer 14 and the light collecting layer 16.
And, under illustrated case, the diffusion optically focused parts 13 of this three-decker for example by gas injection be shaped, the manufacturing process of double-colored shaping or mold-slide shaping etc., limit diffusion layer 14 and light collecting layer 16 airtight low-index layer 15 as hollow bulb, be configured as one thus easily.
The planar light source device 10 of embodiment of the present invention is by the above formation, from the outside when each linear light source 11 is powered, each linear light source 11 bright lamps, the light that penetrates from each linear light source 11 directly or after face 12 reflections that are reflected incides on the diffusion optically focused parts 13 of top.
And the light that incides on the diffusion optically focused parts 13 is at first spread by diffusion layer 14, penetrates from diffusion layer 14 then, enters low-index layer 15.At this moment, incide on the low-index layer 15 that is made of the lower medium of refractive index from diffusion layer 14, on the interface of diffusion layer 14 and low-index layer 15, emergence angle is greater than incident angle thus, so the diffusion effect of diffusion layer 14 increases.
In addition, after the light that incides light collecting layer 16 from low-index layer 15 is assembled according to the optics machining shape 16a of this light collecting layer 16, inject to the top from the upper surface of light collecting layer 16.
Thus, the various display device (not shown) such as liquid crystal panel that are configured in light-emitting area A top are implemented back lighting.
At this moment, the light that penetrates from each linear light source 11 is spread optically focused parts 13 fully diffusion and convergence, thereby can obtain the back lighting of high brightness uniformly on the whole.
Under this situation, in order to carry out from the diffusion and the optically focused of the light of linear light source 11 ejaculations, diffusion optically focused parts 13 have been used as incorporate parts, so constituting the number of components of planar light source device 10 reduces, component costs and assembly cost reduce, and diffusion optically focused parts 13 and planar light source device 10 realized lightweights, thus the abundant correspondence lightweight requirements of the back lighting etc. of large-scale liquid crystal panel etc. for example.
[embodiment 2]
Fig. 4 and Fig. 5 represent the structure of another embodiment of planar light source device of the present invention.
In Fig. 4 and Fig. 5, planar light source device 20 is by constituting with the lower part: at least one, illustrated case is four linear light source 21; Be configured in the reflecting surface 22 of each linear light source 21 belows; Be configured in the diffusion optically focused parts 23 of linear light source 21 and reflecting surface 22 tops.
Above-mentioned linear light source 21 for example is made of cold-cathode tube etc., is flat with equal intervals configured in parallel arranged side by side mutually, so that whole light-emitting area A irradiates light upward.
Above-mentioned reflecting surface 22 for example constitutes the diffusely reflecting surface that is formed by white spraying or Foamex sheet etc., be configured in the below of each linear light source 21, make from the linear light source 21 directives below or the wide of side of correspondence to cause towards top reflection as exit direction.
Above-mentioned diffusion optically focused parts 23 form the three-decker that is shown specifically among Fig. 6, are made of diffusion layer 24, rib layer 25 and light collecting layer 26 successively from the below.
Above-mentioned diffusion layer 24 has diffusion function, and general using is added the resin material that has mixed diffusant and constituted in base material.
Specifically, above-mentioned diffusion layer 24 is by being base material with transparent resins such as polycarbonate resins for example, and adds the resin material that has mixed particulates such as cross-linked poly-methyl methacrylate and form.
And, above-mentioned light collecting layer 26 by at least in the visible region transparent resin material, for example polycarbonate etc. constitute, surface and/or lower surface are upper surface under illustrated case thereon, have optics machining shape 26a.
This optics machining shape 26a be the section configuration of the quafric curve of triangle, trapezoidal or para-curve, elliptic arc etc. or their combination with the direction of cross section perpendicular on scan and the prism shape that obtains, perhaps small polygon taper, the lens arra of aspherical shape, the perhaps shape that forms by the spheroidal particle that constitutes by transparent materials such as resin or glass of coating.
Relative therewith, above-mentioned rib layer 25 is made of a plurality of rib 25a of suitable decentralized configuration, makes above-mentioned diffusion layer 14 and light collecting layer 16 be spaced from each other the interval of regulation, and limits air layer 27 betwixt.
Herein, each rib 25a is respectively by constituting for tabular, the taper of one or the resin material of column with above-mentioned diffusion layer 24 and/or light collecting layer 26.
And the diffusion optically focused parts 23 of this three-decker for example generally by the manufacturing process of extrusion molding etc., make rib layer 25 integrally formed with diffusion layer 24 and light collecting layer 26.
Relative therewith, also can be make 25 on rib layer be configured as one by extrusion molding etc. after with diffusion layer 24, itself and the independently light collecting layer 26 that utilizes ultraviolet curing method etc. to be shaped are pasted.
And, also can make by extrusion molding etc. rib layer 25 add at diffusion layer 24 with extremely low concentration between the hyaline layer (not shown) that has mixed diffusant or pigment integrally formed after, paste the independently light collecting layer 26 and the above-mentioned hyaline layer that utilize ultraviolet curing method etc. to be shaped.Under this situation, light collecting layer 26 is fixed on the hyaline layer securely, has improved installation strength thus.
The planar light source device 20 of embodiment of the present invention is by the above formation, from the outside when each linear light source 21 is powered, each linear light source 21 bright lamps, the light that penetrates from each linear light source 21 directly or after face 22 reflections that are reflected incides on the diffusion optically focused parts 23 of top.
And the light that incides on the diffusion optically focused parts 23 is at first spread by diffusion layer 24, penetrates from diffusion layer 24 then, enters the air layer 27 that each rib 25a by rib layer 25 limits again.
At this moment, incide on the air layer 27 that is made of the lower medium of refractive index from diffusion layer 24, on the interface of diffusion layer 24 and air layer 27, emergence angle is greater than incident angle thus, so the diffusion effect of diffusion layer 24 increases.
In addition, incide after light on the light collecting layer 26 assembles according to the optics machining shape 26a of this light collecting layer 26, inject to the top from the upper surface of light collecting layer 26 from above-mentioned air layer 27.
Thus, the various display device (not shown) that are configured in the liquid crystal panel etc. of light-emitting area A top are implemented back lighting.
At this moment, the light that penetrates from each linear light source 21 is spread optically focused parts 23 fully diffusion and optically focused, thereby can obtain the back lighting of high brightness uniformly on the whole.
Under this situation, in order to carry out from the diffusion and the optically focused of the light of each linear light source 21 ejaculations, diffusion optically focused parts 23 have been used as incorporate parts, so constituting the number of components of planar light source device 20 reduces, component costs and assembly cost reduce, and diffusion optically focused parts 23 and planar light source device 20 realized lightweights, thus the abundant correspondence lightweight requirements of the back lighting etc. of large-scale liquid crystal panel etc. for example.
[utilizability on the industry]
In the above-described embodiment, the light collecting layer of diffusion optically focused parts only thereon the surface have optics Machining shape, but be not limited thereto, also can only have at lower surface or at upper surface and lower surface The optics machining shape.
And in the above-described embodiment, low-index layer is made of air as hollow bulb, but Be not limited thereto, certainly can be comprised by other suitable Jie of same gas, liquid, solid Matter consists of.
Like this, according to the present invention, utilize simple structure that easy realization lightweight structure can be provided Diffusion optically focused parts and planar light source device.
And planar light source device of the present invention can be used as the liquid crystal panel backlight lamp, be imprinted on hyaline membrane Deng on the back lighting of light transmission billboard etc. or the lighting device of the upper local lighting of table etc.
Claims (16)
- A top that is configured in the light source (11) of flat, configuration, constitute the diffusion optically focused parts (13) of the general planar of planar light source device (10), it is characterized in that,Above-mentioned diffusion optically focused parts (13) begin successively to be made of integratedly the diffusion layer with diffusion function (14), low-index layer (15) and light collecting layer (16) with light-focusing function from light source (11) side,Above-mentioned low-index layer (15) is made of refractive index ratio diffusion layer (14) and the low material of light collecting layer (16).
- 2. diffusion optically focused parts according to claim 1 (13) is characterized in that, above-mentioned low-index layer (15) is by being that transparent medium constitutes at least in the visible region.
- 3. diffusion optically focused parts according to claim 2 (13) is characterized in that, above-mentioned low-index layer (15) is the airtight hollow bulb that limits between above-mentioned diffusion layer (14) and light collecting layer (16).
- A top that is configured in the light source (21) of flat, configuration, constitute the diffusion optically focused parts (23) of the general planar of planar light source device (20), it is characterized in that,Above-mentioned diffusion optically focused parts (23) begin to be made of integratedly the light collecting layer with light-focusing function (26) that rib layer (25) separates predetermined space by the diffusion layer with diffusion function (24) with respect to this diffusion layer (24) successively from light source (21) side.
- 5. diffusion optically focused parts according to claim 4 (23) is characterized in that, above-mentioned rib layer (25) constitutes one with above-mentioned diffusion layer (24) and light collecting layer (26).
- 6. diffusion optically focused parts according to claim 4 (23) is characterized in that, above-mentioned rib layer (25) constitutes one with above-mentioned diffusion layer (24), has pasted independent light collecting layer (26) thereon.
- 7. according to each described diffusion optically focused parts (13,23) in the claim 1～6, it is characterized in that above-mentioned diffusion layer (14,24) constitutes by adding the resin material that has mixed diffusant or pigment in the base material.
- 8. according to any described diffusion optically focused parts (13,23) in the claim 1～6, it is characterized in that, above-mentioned light collecting layer (16,26) is by being transparent resin material at least in the visible region or adding the resin material that has mixed diffusant or pigment with extremely low concentration and constituteSurface and/or lower surface have the optics machining shape (16a, 26a) that possesses light-focusing function thereon.
- 9. diffusion optically focused parts according to claim 7 (13,23) is characterized in that, above-mentioned light collecting layer (16,26) is by being transparent resin material at least in the visible region or adding the resin material that has mixed diffusant or pigment with extremely low concentration and constitute,Surface and/or lower surface have the optics machining shape (16a, 26a) that possesses light-focusing function thereon.
- 10. diffusion optically focused parts according to claim 8 (13,23), it is characterized in that, above-mentioned optics machining shape (16a, 26a) be the section configuration of the quafric curve of triangle, trapezoidal or para-curve, elliptic arc etc. or their combination with the direction of cross section perpendicular on scan and the prism shape that obtains.
- 11. diffusion optically focused parts according to claim 8 (13,23) is characterized in that, above-mentioned optics machining shape (16a, 26a) is the lens arra of small polygonal awl, aspherical shape.
- 12. diffusion optically focused parts according to claim 8 (13,23) is characterized in that, above-mentioned optics machining shape (16a, 26a) is to be given by the roughly spheroidal particle that transparent materials such as resin or glass constitute by coating.
- 13. diffusion optically focused parts according to claim 9 (13,23), it is characterized in that, above-mentioned optics machining shape (16a, 26a) be the section configuration of the quafric curve of triangle, trapezoidal or para-curve, elliptic arc etc. or their combination with the direction of cross section perpendicular on scan and the prism shape that obtains.
- 14. diffusion optically focused parts according to claim 9 (13,23) is characterized in that, above-mentioned optics machining shape (16a, 26a) is the lens arra of small polygonal awl, aspherical shape.
- 15. diffusion optically focused parts according to claim 9 (13,23) is characterized in that, above-mentioned optics machining shape (16a, 26a) is to be given by the roughly spheroidal particle that transparent materials such as resin or glass constitute by coating.
- 16. a planar light source device (10,20) is characterized in that, comprising: the light source of flat, configuration (11,21); Be configured in any described diffusion optically focused parts (13,23) in the claim 1～15 of above-mentioned light source (11,21) top.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2004350657 | 2004-12-03 | ||
| JP2004350657A JP2006162718A (en) | 2004-12-03 | 2004-12-03 | Diffusion light-condensing member and surface light source device |
| JP2004366980 | 2004-12-20 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1794055A CN1794055A (en) | 2006-06-28 |
| CN100470327C true CN100470327C (en) | 2009-03-18 |
Family
ID=36664847
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB200510126100XA Expired - Fee Related CN100470327C (en) | 2004-12-03 | 2005-11-24 | Light diffusing/collecting member and surface light source device using the same |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JP2006162718A (en) |
| CN (1) | CN100470327C (en) |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI382203B (en) * | 2007-05-31 | 2013-01-11 | Chi Mei Corp | Light diffusion laminated board |
| KR101244550B1 (en) * | 2009-05-07 | 2013-03-18 | 코오롱인더스트리 주식회사 | Light Diffusion member |
| CN102906488B (en) * | 2010-05-28 | 2016-03-16 | 皇家飞利浦电子股份有限公司 | Beam-shaping optical is stacking, light source and light fixture |
| KR101392347B1 (en) | 2013-05-15 | 2014-05-12 | 신화인터텍 주식회사 | Complex optical film and light source assembly including the same |
| CN109828407A (en) * | 2019-04-10 | 2019-05-31 | 惠科股份有限公司 | Colored filter substrate, display device and backlight type display device |
| CN113808478A (en) * | 2020-06-17 | 2021-12-17 | 北京小米移动软件有限公司 | Screen assembly, control method and control device thereof and electronic equipment |
| CN213513426U (en) * | 2020-11-10 | 2021-06-22 | 欧普照明股份有限公司 | Optical device and lighting lamp |
-
2004
- 2004-12-03 JP JP2004350657A patent/JP2006162718A/en active Pending
-
2005
- 2005-11-24 CN CNB200510126100XA patent/CN100470327C/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| CN1794055A (en) | 2006-06-28 |
| JP2006162718A (en) | 2006-06-22 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN100470327C (en) | Light diffusing/collecting member and surface light source device using the same | |
| JP3931070B2 (en) | Planar light source device and liquid crystal display device including the same | |
| CN1904691B (en) | Optical unit, a method of manufacturing the same, a backlight assembly having the same and a display device having the same | |
| US6752507B2 (en) | Backlight module structure | |
| CN101126822B (en) | Optical board and the backlight module group using same | |
| US20070014034A1 (en) | Diffusion plate used in direct-type backlight module and method for making the same | |
| US20060262564A1 (en) | Backlight and liquid crystal display device | |
| KR20080063338A (en) | Luminaire with stack of flat panel light guides | |
| US20090109656A1 (en) | Optical plate and backlight module using the same | |
| CN101755166B (en) | Illumination device and display device | |
| CN101093317A (en) | Integral optical plate, and backlight assembly and liquid crystal display apparatus having the same | |
| CN211293322U (en) | Composite diffusion plate and backlight module | |
| CN107526215A (en) | Double-sided display backlight module and display with double faces | |
| CN101358712A (en) | Backlight module and light-mixing structure thereof | |
| CN102913855A (en) | Backlight module and light mixing structure thereof | |
| US7048426B2 (en) | Backlight module | |
| CN101358711A (en) | Light supply apparatus and panel display | |
| CN101158784A (en) | Back light source | |
| US7857476B2 (en) | Display backlight including an array of optical waveguides | |
| CN100406999C (en) | Light guide plate and backlight module using same | |
| KR20060063669A (en) | Diffusion ray collection material and surface light source device comprising the same | |
| US20050013001A1 (en) | Composite micro-structured sheet for diffusing and condensing light | |
| CN101620342A (en) | Backlight module and optical plate thereof | |
| CN100405155C (en) | Backlight module | |
| CN114019720B (en) | Backlight module and display device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| 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: 20090318 Termination date: 20131124 |