CN107533257A

CN107533257A - Lighting device and display device

Info

Publication number: CN107533257A
Application number: CN201680024009.3A
Authority: CN
Inventors: 田中正太郎; 若原隆; 若原隆一; 塚村裕介
Original assignee: Toray Industries Inc
Current assignee: Toray Industries Inc
Priority date: 2015-05-20
Filing date: 2016-05-19
Publication date: 2018-01-02
Anticipated expiration: 2036-05-19
Also published as: KR20180008436A; CN107533257B; JP6787127B2; JPWO2016186158A1; WO2016186158A1; KR102538377B1

Abstract

The application is related to the lighting device for possessing optical wavelength conversion chip, optical wavelength selective filter and light-emitting component, it is characterized in that, the lighting device possesses light-emitting component, optical wavelength conversion chip and optical wavelength selective filter successively, the area of the optical wavelength selective filter is smaller than the area of the optical wavelength conversion chip, and the light-emitting component is possessed in a manner of with the optical wavelength conversion chip interval.Color this problem different from the color near end near illumination apparatus central portion of the present invention is improved, there is provided the even few lighting device of irregular colour and use its display device.

Description

Lighting device and display device

Technical field

The present invention relates to for the lighting device such as liquid crystal display and use its display device.

Background technology

In the lighting device for liquid crystal display etc., as the lighting device for pure color to be presented with high efficiency, make It is used as light source with light-emitting components such as blue led, blue lasers and carries out color using the film containing quantum dot, fluorophor The lighting device of regulation is being utilized (patent document 1).

In the lighting device, from film of the light-emitting components such as blue led, the blue laser direction containing quantum dot, fluorophor Blue light is sent, the blue light color for making to send using quantum dot, fluorophor is converted into green light, red light.Afterwards, will be luminous The blue light of element is obtained with being combined using green light, red light obtained from quantum dot, fluorophor progress color conversion White light.

Prior art literature

Patent document

Patent document 1：Japanese Unexamined Patent Application Publication 2013-544018 publications

The content of the invention

Invention technical problems to be solved

As described above, the lighting device used in liquid crystal display etc., i.e. used blue led, blue laser etc. to send out Optical element and containing quantum dot, fluorophor film and obtain in the lighting device of white light that there are the following problems, compared to photograph Near bright device central portion color (for liquid crystal display when, refer to the display color near picture central portion) for, illumination Near device end color (for liquid crystal display when, refer to the display color near picture end) emitting element it is luminous The influence of color is bigger (when light-emitting component is blue led, blue laser, turning into the color with point blueness).

It is an object of the present invention to this different from the color near end of color near illumination apparatus central portion is asked Topic improved, there is provided the even few lighting device of irregular colour and use its display device.

The means to solve the problem

The above-mentioned purpose of the present invention is realized substantially by following invention.

[1] lighting device, it is the illumination dress for possessing optical wavelength conversion chip, optical wavelength selective filter and light-emitting component To put, it is characterised in that above-mentioned lighting device possesses light-emitting component, optical wavelength conversion chip and optical wavelength selective filter successively, on It is smaller than the area of above-mentioned optical wavelength conversion chip to state the area of optical wavelength selective filter, above-mentioned light-emitting component with above-mentioned optical wavelength The mode of conversion sheet interval is possessed.

[2] lighting device, it is the illumination dress for possessing optical wavelength conversion chip, optical wavelength selective filter and light-emitting component To put, it is characterised in that above-mentioned lighting device possesses light-emitting component, optical wavelength selective filter and optical wavelength conversion chip successively, on It is smaller than the area of above-mentioned optical wavelength conversion chip to state the area of optical wavelength selective filter, above-mentioned light-emitting component with above-mentioned optical wavelength The mode of conversion sheet interval is possessed.

[3] lighting device, it is the illumination for possessing the 1st optical wavelength conversion chip, the 2nd optical wavelength conversion chip and light-emitting component Device, it is characterised in that above-mentioned lighting device possesses the 1st optical wavelength conversion chip, light-emitting component, the 2nd optical wavelength conversion chip successively, The area of 1st optical wavelength conversion chip is smaller than the area of the 2nd optical wavelength conversion chip, above-mentioned light-emitting component with above-mentioned 2nd optical wavelength The mode of conversion sheet interval is possessed.

[4] lighting device as described in [1] or [2], it is characterised in that above-mentioned optical wavelength selective filter meets following formula (1),

| λ 2- λ 3 |≤50 (wherein, λ 1<λ 2, λ 1<λ3) (1)

λ1:The emission wavelength (nm) of light-emitting component

λ2:The transmitance of optical wavelength selective filter turns into the wavelength (nm) when 70%

λ3:The transmitance of optical wavelength selective filter turns into the wavelength (nm) when 30%.

[5] lighting device any one of [1]~[3] as described above, it is characterised in that above-mentioned optical wavelength selection filtering The surface of device and/or above-mentioned optical wavelength conversion chip has concaveconvex shape.

[6] lighting device as described in [1] or [2], it is characterised in that corresponding to the whole of above-mentioned optical wavelength conversion chip Face, it is provided with multiple above-mentioned light-emitting components.

[7] lighting device as described in [3], it is characterised in that corresponding to the entire surface of above-mentioned 2nd optical wavelength conversion chip, It is provided with multiple above-mentioned light-emitting components.

[8] lighting device as described in [1] or [2], it is characterised in that above-mentioned lighting device is also equipped with light guide plate, above-mentioned Light guide plate is configured at the light from above-mentioned light-emitting component untill above-mentioned optical wavelength conversion chip for the light that above-mentioned light-emitting component is sent Lu Zhong.

[9] lighting device as described in [3], it is characterised in that above-mentioned lighting device is also equipped with light guide plate, above-mentioned light guide plate It is configured at the light path from above-mentioned light-emitting component untill above-mentioned 2nd optical wavelength conversion chip for the light that above-mentioned light-emitting component is sent In.

[10] lighting device as described in [8] or [9], it is characterised in that along the end of above-mentioned light guide plate, be provided with more Individual above-mentioned light-emitting component.

[11] lighting device as any one of [1]~[3], it is characterised in that above-mentioned lighting device is also containing bright Degree improves film, and above-mentioned brightness raising film is arranged to than in light-emitting component, optical wavelength conversion chip, optical wavelength selective filter Any part closer to exiting side.

[12] lighting device as described in [11], it is characterised in that at the wavelength X 3 of above-mentioned optical wavelength selective filter Direction institute structure when the transmitance that direction when transmitance turns into maximum improves at the wavelength X 3 of film with above-mentioned brightness turns into maximum Into angle be less than 10 °.

[13] lighting device as described in [11], it is characterised in that at the wavelength X 3 of above-mentioned optical wavelength selective filter Direction institute structure when the transmitance that direction when transmitance turns into maximum improves at the wavelength X 3 of film with above-mentioned brightness turns into maximum Into angle be more than 80 °.

[14] lighting device as any one of [1]~[3], it is characterised in that above-mentioned lighting device is also containing just Reflexive reflectance coating, and the reflectance coating of above-mentioned normal reflection is arranged to than light-emitting component, optical wavelength conversion chip, optical wavelength Any part in wave filter is selected closer to the opposite side of exiting side.

[15] display device, it is possess display panel and the lighting device being disposed adjacent with the display panel aobvious Showing device, it is characterised in that above-mentioned lighting device is the lighting device any one of [1]~[14].

Invention effect

By the invention it is possible to obtain the even few lighting device of irregular colour, when using it for display device, can obtain The even display device few, display performance is excellent of irregular colour.

Brief description of the drawings

The sketch of one example of [Fig. 1] lighting device.

The sketch of one example of [Fig. 2] display device.

The schematic diagram of 1st embodiment of the lighting device of [Fig. 3] present invention.

One example of [Fig. 4] the 1st wavelength and the 2nd wavelength.

There is no light path during optical wavelength selective filter in [Fig. 5] the 1st embodiment.

There is light path during optical wavelength selective filter in [Fig. 6] the 1st embodiment.

An example of optical wavelength selective filter and optical wavelength conversion chip in [Fig. 7] the 1st embodiment.

The schematic diagram of 2nd embodiment of the lighting device of [Fig. 8] present invention.

The schematic diagram of 3rd embodiment of the lighting device of [Fig. 9] present invention.

There is no light path during optical wavelength selective filter in [Figure 10] the 3rd embodiment.

There is light path during optical wavelength selective filter in [Figure 11] the 3rd embodiment.

An example of optical wavelength selective filter and optical wavelength conversion chip in [Figure 12] the 3rd embodiment.

The schematic diagram of 4th embodiment of the lighting device of [Figure 13] present invention.

The schematic diagram of 5th embodiment of the lighting device of [Figure 14] present invention.

There is no light path during 1 optical wavelength conversion chip in [Figure 15] the 5th embodiment.

There is light path during 1 optical wavelength conversion chip in [Figure 16] the 5th embodiment.

1st optical wavelength conversion chip and an example of reflecting plate in [Figure 17] the 5th embodiment.

The schematic diagram of 6th embodiment of the lighting device of [Figure 18] present invention.

[Figure 19] lighting device A simple diagram.

[Figure 20] xy chromatic diagrams.

Embodiment

Hereinafter, embodiments of the present invention are illustrated.

Fig. 1 (a) is the cross-sectional of an example of lighting device of the present invention, and Fig. 1 (b) is substrate, LED and reflecting plate Diagrammatic top view.Cross-sectional when Fig. 2 is for example using liquid crystal display as display device.As liquid crystal display, have TV, Monitor, notebook PC, flat carried terminal, smart mobile phone etc., but it is not limited to these.In addition, lighting device In addition to for liquid crystal display, the display device of signboard, automatic vending machine etc. is can be also used for, in addition, is also suitable for As various lighting devices such as home-use lighting machine, facility lighting machines, but it is not limited to these.Light as Fig. 1 and Fig. 2 Film is learned, diffusion barrier, prism film, Counter-reflection membrane etc. can be used.

Optical wavelength conversion chip refers to the sheet material that the light of specific wavelength is converted into the light of other wavelength.In the present invention, it is excellent Choosing uses the light wavelength conversion for the light (light of the 2nd wavelength) that the light (light of the 1st wavelength) of specific wavelength is converted into other wavelength Piece.

Herein, the light of specific wavelength is converted into just referring to for other wavelength, by the light in certain wave strong point with peak ( The light of 1 wavelength) it is converted into the light (light of the 2nd wavelength) at the wavelength outside the specific wavelength with peak.In addition, the 2nd wavelength Light can be light at a wavelength with peak or the light with peak respectively at two wavelength.That is, the 1st ripple Long light passes through optical wavelength conversion chip, can be converted into different wavelength (the 2nd ripple of the spike length of the light from the 1st wavelength It is long) place have peak the 2nd wavelength light, the light that can also be converted at the 2nd wavelength α with peak and at the 2nd wavelength β with Two kinds of light of the light at peak.

The light of 1st wavelength be preferably 200nm less than 380nm (near ultraviolet) have peak wavelength light and/or There is the light of the wavelength at peak in 380nm less than 495nm (indigo plant).More preferably have in more than 220nm and below 350nm The light of the wavelength at peak and/or the light in the wavelength of more than 400nm and below 470nm with peak, and then be preferably in more than 240nm And light and/or the light in the wavelength of more than 410nm and below 460nm with peak of wavelength of below the 320nm with peak.As hair Go out the light-emitting component of the light of these wavelength, such as near ultraviolet LED, blue led can be enumerated.In addition, the light as the 2nd wavelength, excellent Elect as selected from by 495nm less than the light of (green) wavelength with peak of 570nm, in 570nm less than 590nm The light of the wavelength of (Huang) with peak and the light of more than 590nm and the wavelength of below 750nm (red) with peak composition group in At least one wavelength light.More preferably be selected from by have in more than 510nm and below 565nm the light of the wavelength at peak, The light of the wavelength of more than 575nm and below 590nm with peak and in the wavelength of more than 600nm and below 700nm with peak The light of at least one wavelength in the group of light composition, more preferably it is selected from by the ripple of more than 520nm and below 555nm with peak Long light, in the light of the wavelength of more than 580nm and below 590nm with peak and in more than 610nm and below 680nm is with peak Wavelength light composition group at least one wavelength light.

In addition, optical wavelength selective filter refers to, the wave filter of the light of transmission or reflection specific wavelength.

Herein, the area of optical wavelength selective filter is preferably smaller than the area of optical wavelength conversion chip.Optical wavelength is selected to filter , can be with efficiency when the area of ripple device is set smaller than the area of optical wavelength conversion chip and is partially disposed in lighting device The color of the emergent light of lighting device is partly adjusted well, therefore preferably.

It should be noted that light-emitting component refers to the semiconductor element for sending light.No matter light-emitting component sets in which way Put in lighting device, still, such as when being arranged on substrate, from the aspect of efficiency lights well, it is preferable that The entire surface of optical wavelength conversion chip is provided with multiple light-emitting components, when stating light guide plate after use, from luminous efficiency From the aspect of, there are multiple light-emitting components preferably along the end set of light guide plate.

(the 1st embodiment)

Using Fig. 3~Fig. 7, the 1st embodiment of an example as lighting device of the present invention is illustrated.

Fig. 3 is the schematic diagram of the 1st embodiment of lighting device of the present invention.Possess optical wavelength conversion chip 31 and optical wavelength choosing Wave filter 32 is selected, blue led 33 is provided with substrate 34 and is used as light-emitting component.In addition, carry out self-luminous member to reflect/spread The light of part, it is provided with reflecting plate 37 and diffuser plate 38.

Possess blue led 33, optical wavelength conversion chip 31, optical wavelength selective filter 32 successively.

Blue led 33 is possessed in a manner of with the interval of optical wavelength conversion chip 31, and towards optical wavelength conversion chip 31 It is luminous.

The area of optical wavelength selective filter 32 is preferably smaller than the area of optical wavelength conversion chip 31.Optical wavelength is selected to filter When the area of device 32 is set smaller than the area of optical wavelength conversion chip 31 and is partially disposed in lighting device, Ke Yixiao Rate partly adjusts the color of the emergent light of lighting device well, therefore preferably.

In 1st embodiment, optical wavelength selective filter 32 be the 1st wavelength for making to send from blue led 33 light reflection, And the part for passing through the light for the 2nd wavelength that the light of the 1st wavelength changed and generated by optical wavelength conversion chip 31.

Optical wavelength selective filter 32 in 1st embodiment refers to following wave filter, and it is for through light wavelength conversion The light of 2nd wavelength obtained by the conversion of piece 31, the light for becoming the wavelength (being grown hereinafter also referred to as the spike of the 2nd wavelength) at peak pass through More than 85%, also, for the light of the 1st wavelength, become the light of the wavelength (being grown hereinafter also referred to as the spike of the 1st wavelength) at peak Reflection more than 20%.That is, it refers to that the transmitance in the spike strong point of the 2nd wavelength is more than 85% and in the spike of the 1st wavelength The reflectivity of strong point is more than 20% wave filter.It should be noted that when two or more be present in the light of the 2nd wavelength, refer to for All the transmitance of the light of the 2nd wavelength is more than 85% wave filter.

1st wavelength just has the light at peak in certain wave strong point, the 2nd wavelength just different from the light of the 1st wavelength Wavelength at there is the light at peak.

Fig. 4 is an example of the 1st wavelength and the 2nd wavelength.Fig. 2 wavelength example is that light-emitting component is blue led, light wave Long conversion sheet include green by the use of quantum dot (blue light of the blue wavelength as the 1st wavelength sent from blue led by conversion and Send the green light of the green wavelength as the 2nd wavelength) and red by the use of quantum dot, (blue light is changed and sends and be used as the 2nd ripple The red light of long red wavelength) this 2 kinds of quantum dots situation example.The peak of the blue light of blue led is 450nm, green The peak of light is 550nm, and the peak of red light is 610nm.By the way that these light compositings are got up, white light is obtained.

Fig. 5 and Fig. 6 is when being illustrated respectively in without optical wavelength selective filter 32 and has an optical wavelength selective filter The figure of light path when 32.

As shown in fig. 6, optical wavelength selective filter 32 make through optical wavelength conversion chip change obtained by green light and red light Through making part or all of reflection for the blue light that blue led sends.Herein, one of the blue light that blue led sends is made Divide reflection to refer to, be more than 20% in the reflectivity possessed by the blue light that blue led is sent at the wavelength at peak, make blueness The whole reflections for the blue light that LED is sent refer to, in the reflectivity possessed by the blue light that blue led is sent at the wavelength at peak For more than 100%.

Therefore, situation of the band indigo plant degree compared to Fig. 5 of the light projected in the outgoing surface side of optical wavelength selective filter 32 In (situation of i.e. no optical wavelength selective filter 32) for the light that outgoing surface side is projected, mitigate.

According to the principle, by waited near the end of lighting device with the strong part of blue degree (light-emitting component it is luminous Color influences strong part), optical wavelength selective filter 32 is partly configured, so as to improve the color of lighting device not Uniformly.

It should be noted that because by the blue light that optical wavelength selective filter 32 reflects by by reflecting plate etc. reflection from And be able to be reused in lighting device, therefore light loss is few.Thus, mitigate compared to the principle for following absorption blue light For other color adaptation methods with blue degree, it is able to carry out color adaptation in the case where light loss is small.

The reflectivity of the spike length of the wavelength of 32 preferred pair of optical wavelength selective filter the 1st is more than 20%.On the other hand, such as Fruit reflectivity is too high, it is possible to can produce by the mitigation effect with blue degree it is excessive caused by irregular colour it is even, therefore to the 1st ripple The reflectivity of long spike length is more preferably 25~90%, and then preferably 30~80%.

The transmitance of the spike length of the wavelength of 32 preferred pair of optical wavelength selective filter the 2nd is more than 85%, more preferably More than 87%, and then preferably more than 90%.

Optical wavelength selective filter 32 can also be for example as shown in fig. 7, be laminated in optical wavelength conversion chip 31.

Optical wavelength selective filter 32 is it is also preferred that meet following formula (1).Following formula (1) means the wave band and light quilt that light is reflected The change of transmitance between the wave band of transmission drastically, also, with | λ 2- λ 3 | reduce, more sharp become from the wave band of reflection Turn to the wave band of transmission.From reflected waveband to the change through wave band (that is, in the case of the 1st embodiment, from making blueness The wave band of blue light that LED is sent reflection is lighted ripple as the 2nd obtained from being changed by optical wavelength conversion chip to making blue light The change for the wave band that the green light of long green wavelength passes through) so drastically carry out, so as to being able to selectivity efficient only anti- Penetrate blue light and green light is passed through, be easy to so that the effect of optical wavelength selective filter is realized to greatest extent.

| λ 2- λ 3 |≤50 (wherein, λ 1<λ 2, λ 1<λ3)(1)

λ1：The emission wavelength (nm) of light-emitting component

λ2：The transmitance of optical wavelength selective filter turns into the wavelength (nm) when 70%

λ3：The transmitance of optical wavelength selective filter turns into the wavelength (nm) when 30%.

Optical wavelength selective filter is preferably using the filter for being laminated with 2 kinds of transparent in visible region and different refractive index films Ripple device.By the way that 2 kinds of different film layers of refractive index are folded, light can be reflected at the interface of film, by the refractive index for adjusting 2 kinds of films The thickness of poor and each film, the wavelength of the light of reflection can be selected.In addition, the stacking number by adjusting 2 kinds of films being layered on top of each other, can To adjust reflectivity.

2 kinds of films can be organic resin material or inorganic based material, can be thermoplasticity as organic resin Any of resin, curable resin.Alternatively, it is also possible to being equal poly resin, copolymer resins or the mixing of two or more resin Thing.Because thermoplastic resin molded property is good, therefore more preferably.In addition, various additives, example can also be added in each resin Such as, antioxidant, antistatic agent, Nucleating Agent, inorganic particulate, organic filler, viscosity reductant, heat stabilizer, lubricant, infrared ray are inhaled Receive agent, ultra-violet absorber, dopant for adjusting refractive index etc..

During using blue led, fluorescent whitening agent is preferably contained in optical wavelength selective filter.Fluorescent whitening agent refers to, The light for being shorter than the emission wavelength of blue led by wavelength excites and sends the material of blue light, can be with by containing fluorescent whitening agent Though will be sent by LED but the light of the short wavelength of wavelength convert can not be carried out by optical wavelength conversion chip, being converted into blue light, (it can Green light, red light are converted into by optical wavelength conversion chip), can improve brightness during as lighting device.

As the example of thermoplastic resin, can use：The polyenes such as polyethylene, polypropylene, polystyrene, polymethylpentene The polyamides such as hydrocarbon resin, alicyclic polyolelfin resin, nylon 6, nylon66 fiber, aromatic polyamide resin, poly terephthalic acid Glycol ester, polybutylene terephthalate (PBT), PTT, polybutyl succinate, poly- 2,6- naphthalenes diacid The polyester resin such as glycol ester, polycarbonate resin, polyarylate resin (polyarylate resin), polyacetal resin, polyphenyl Sulfide resin, TFE, trifluoro-ethylene resin, trifluoro ethylene chloride resin, tetrafluoraoethylene-hexafluoropropylene copolymer, The acrylic resins such as the fluororesin such as pvdf resin, PMMA, methacrylic resin, polyacetal resin, polyglycolic acid resin, Polylactic resin, acrylonitrile butadient styrene, acrylonitrile ethylene-acrylic rubber, styrol copolymer etc..Its In, from the viewpoint of the strength thermal resistant transparency, particularly more preferably polyester resin.

In polyester resin, preferably using polyethylene terephthalate and its copolymer, PEN And its copolymer, polybutylene terephthalate (PBT) and its copolymer, PBN and its copolymer, Yi Jiju Terephthalic acid (TPA) hexylidene ester and its copolymer, poly- naphthalenedicarboxylic acid hexylidene ester and its copolymer etc..

In order to be met the optical wavelength selective filter of above-mentioned formula (1), it is also preferred that using the layer comprising thermoplastic resin Folded film.Now, though there is the increased tendency of the number of plies, also easily by control multiple thickness degree and make wavelength band, particularly from Reflected waveband becomes drastically to the change through wave band.

The shape of optical wavelength selective filter can be planar or be provided with the shape in multiple holes on the whole, also may be used Can be circular, ellipse, the shape surrounded by other curves, triangle, quadrangle, other polygons etc. to be netted It is variously-shaped.

The above-mentioned optical wavelength selective filter for being laminated with 2 kinds of different films of refractive index like that can also be further laminated to Other sheet materials use.The shape of optical wavelength selective filter when being laminated to other sheet materials can be planar or The shape in multiple holes or netted is provided with the whole, the state that the interval such as can also be laminated with point-like be laminated, Can also be the various shapes such as circular, ellipse, the shape surrounded by other curves, triangle, quadrangle, other polygons Shape.

The surface of optical wavelength selective filter and/or optical wavelength conversion chip preferably has concaveconvex shape.Tool referred to herein There is concaveconvex shape expression：When determining the surface roughness of optical wavelength selective filter and/or optical wavelength conversion chip, based on JIS B0601 (2001) Rz is more than 1 μm.It is highly preferred that Rz is more than 10 μm, following effects are readily obtained.

The 1st as obtained from making the surface of optical wavelength selective filter and/or optical wavelength conversion chip that there is concaveconvex shape Effect is easy slip.Easy slip is presented due to there is concaveconvex shape by surface, therefore, it is possible to suppress to select by optical wavelength The generation of damage when wave filter and/or optical wavelength conversion chip loading lighting device.

2nd effect is the taking-up of light.Inventors herein have recognized that for optical wavelength conversion chip, because light is in light wave Long conversion chip reflection, so as to cause to produce the phenomenon being enclosed in the sheet material into such as optical fiber, brightness declines.It is used as it Solution, by the way that there is concaveconvex shape on the surface of optical wavelength selective filter and/or optical wavelength conversion chip, so as to which light is able to It is extracted from the concavo-convex interface, therefore the light for making inclosure enter in optical wavelength conversion chip is reduced, and obtains the effect of brightness raising.

3rd effect is the regulation of the light path of light.The light for carrying out self-emission device (particularly light emitting diode) is shown with direction The relatively high directivity of side is advanced, in contrast, the light from optical wavelength conversion chip is but isotropically lighted, therefore is turned into The reason for light source positive luminance-reduction.It is recessed by having on the surface of optical wavelength selective filter and/or optical wavelength conversion chip Convex form, so as to adjust the direction of light in concavo-convex interface, particularly in positive direction optically focused, thus easily realize that brightness improves, In addition, due to formed lighting device, display device when can also save other optical components, therefore also contribute to it is low into This change.

In order to more effectively obtain the above-mentioned 2nd, the 3rd effect, above-mentioned concaveconvex shape is preferably microlens shape, prism shape Shape, subtriangular shape or semicircular shape.Microlens shape refers to approximate hemispherical bumps, and prism shape refers to approximation The bumps of triangle.During with this shape, the direction of light shows the light path of side by optically focused, therefore, as lighting device, display Front face brightness during device further significantly improves.

Above-mentioned light-emitting component is the semiconductor element for sending light, and light-emitting component can use blue, near ultraviolet wavelength Any appropriate light-emitting component such as LED, laser.

Optical wavelength conversion chip is the sheet material for the light that the light of specific wavelength is converted into other wavelength as described above, such as containing The quantum dot of function with converting light wavelength, the sheet material of fluorophor.Can be containing quantum dot, fluorophor in resin sheet Optical wavelength conversion chip or the optical wavelength of the film containing quantum dot, fluorophor has been laminated on the sheet material as base material Conversion sheet.

As optical wavelength conversion chip, using being laminated the film containing quantum dot, fluorophor on the sheet material as base material During optical wavelength conversion chip, the area of optical wavelength selective filter is preferably smaller than the area containing quantum dot, the film of fluorophor.By light The area of wavelength selective filters is set smaller than the area of the film containing quantum dot, fluorophor and is partially disposed in photograph When in bright device, the color of the emergent light of lighting device can be partly adjusted well with efficiency, therefore preferably.

The combination of white light is obtained as using light-emitting component and optical wavelength conversion chip, for example, during using blue led, can To use the optical wavelength conversion chip containing yellow quantum dot, the yellow is used as the 1st by the use of quantum dot using what is sent from blue led The blue light of the blue wavelength of wavelength is changed and sends the sodium yellow of the yellow wavelengths as the 2nd wavelength.Use near ultraviolet During LED, it can also use containing red by the use of quantum dot (its near ultraviolet wavelength as the 1st wavelength that will be sent near ultraviolet LED Light changed and send the red light of the red wavelength as the 2nd wavelength), green quantum dot (its nearly ultraviolet wavelength Light changed and send the green light of the green wavelength as the 2nd wavelength) and blueness quantum dot (its nearly ultraviolet wavelength Light changed and send the blue light of the blue wavelength as the 2nd wavelength) optical wavelength conversion chip.

As quantum dot, the CdSe with ZnS shells can be enumerated as example.Alternatively, it is also possible to using containing CdSe/ZnS, InP/ZnS, PbSe/PbS, CdSe/CdS, CdTe/CdS or CdTe/ZnS core shell Illuminant nanometer crystallization.

As fluorophor, green fluorophor can enumerate SrGa₂S₄:Eu²⁺, red fluorophor can enumerate (Ca, Sr, Ba) S:Eu²⁺.In the expression of fluorescent material, ":" before content representation parent, ":" after content representation activator.

In addition, though white light has been obtained in the present embodiment, but as the light projected from lighting device, in order to obtain The light of desired color, it can also suitably select the species of light-emitting component, fluorophor.

It is in 1st embodiment it is also preferred that same with Fig. 1, Fig. 2, in the exiting side of optical wavelength selective filter, optics is set Piece, prismatic lens, micro-lens sheet are particularly preferably set, polarize brightness raising film as optical reflection film.Prismatic lens, lenticule, partially The optical reflection film that shakes advantageously serves to front face brightness raising all the time, can particularly when being applied in combination with optical wavelength conversion chip So that once through optical wavelength conversion chip light reflected on optical film and to optical wavelength conversion chip lateral reflection again wavelength turn Change, the effect of the cost degradation by reducing the usage amount of expensive quantum dot etc. and bringing can also be obtained.

As further preferred combination, can enumerate the transmitance at the wavelength X 3 with optical wavelength selective filter turns into most The angle that direction when the transmitance that direction when big improves at the wavelength X 3 of film with brightness turns into maximum is formed is more than 80 ° Mode configured.Refer to here, transmitance turns into maximum direction, to film surface vertically incident wavelength λ 3 polarised light, Rotate the every 5 ° of ground of polarization plane, direction when transmitance turns into maximum.The transmitance of optical wavelength selective filter turns into maximum Direction and brightness improve the transmitance of film to turn into maximum direction mutually orthogonal, so as to can not be by using brightness raising film The polarised light of optical wavelength selective filter reflection effectively reflects, and can further improve the effect of optical wavelength selective filter.

As reflecting plate 37, the reflectance coating of light diffusing as white films, more preferably normal reflection can also be used The reflectance coating of property.Here, normal reflection refers to the record according to JIS Z8741 (1997), in 60 ° of incident angle, the angle of emergence The glossiness measured under conditions of 60 ° of degree is more than 100.By using the reflectance coating of normal reflection, can suppress to be selected by light While selecting the light of wavelength filter reflection, the scattering of the luminous light of wavelength convert is carried out through optical wavelength conversion chip, efficiently Light is reflected, therefore, the even effect of the irregular colour of the lighting device that can be inhibited.

(the 2nd embodiment)

Fig. 8 is the schematic diagram of the 2nd embodiment of lighting device of the present invention.Possess optical wavelength conversion chip 81 and optical wavelength choosing Wave filter 82 is selected, possesses blue led 83 in the end of light guide plate 85 and is used as light-emitting component.

Possess blue led 83, optical wavelength conversion chip 81, optical wavelength selective filter 82 successively.

Blue led 83 is possessed in a manner of with the interval of optical wavelength conversion chip 81.The light of blue led 83 is from light guide plate 85 end enters light, is shot up while by light guide plate leaded light.Based on the principle, light is sent towards optical wavelength conversion chip 81.

The area of optical wavelength selective filter 82 is preferably smaller than the area of optical wavelength conversion chip 81.Optical wavelength is selected to filter , can be with when the area of device 82 is set smaller than the area of optical wavelength conversion chip 81 and is partially disposed in lighting device Efficiency partly adjusts the color of the emergent light of lighting device well, therefore preferably.

Other forms of 2nd embodiment are identical with the 1st embodiment.

(the 3rd embodiment)

Using Fig. 9~Figure 12, the 3rd embodiment of an example as lighting device of the present invention is illustrated.

Fig. 9 is the schematic diagram of the 3rd embodiment of lighting device of the present invention.Possess optical wavelength conversion chip 91 and optical wavelength choosing Wave filter 92 is selected, substrate 94, which is provided with blue led 93, is used as light-emitting component.In addition, carry out self-luminous member to reflect diffusion The light of part, it is provided with reflecting plate 97 and diffuser plate 98.

Possess blue led 93, optical wavelength selective filter 92, optical wavelength conversion chip 91 successively.

Blue led 93 is possessed in a manner of with the interval of optical wavelength conversion chip 91, is sent out towards optical wavelength conversion chip 91 Light.

The area of optical wavelength selective filter 92 is preferably smaller than the area of optical wavelength conversion chip 91.Optical wavelength is selected to filter , can be with when the area of device 92 is set smaller than the area of optical wavelength conversion chip 91 and is partially disposed in lighting device Efficiency partly adjusts the color of the emergent light of lighting device well, therefore preferably.

In 3rd embodiment, optical wavelength selective filter 92 passes through the light of the 1st wavelength sent from blue led 93, makes The light reflection for the 2nd wavelength that the light of 1st wavelength is changed and generated through optical wavelength conversion chip 91.

The optical wavelength selective filter 92 of 3rd embodiment is following such wave filters：The wave filter is directed to from indigo plant The light for the 1st wavelength that color LED93 is sent so that pass through 85% as the wavelength (being grown hereinafter also referred to as the spike of the 1st wavelength) at peak More than, also, the light of the 2nd wavelength for changing and generating through optical wavelength conversion chip 91 so that as peak wavelength (it is following, Also referred to as the 2nd wavelength spike length) light reflection more than 20%.That is, optical wavelength selective filter 92 refers to the spike of the 1st wavelength The transmitance of strong point be more than 85% and the 2nd wavelength spike strong point reflectivity be more than 20% wave filter.Need It is bright, when the light of the 2nd wavelength has two or more, refer to the filtering for being more than 20% to the reflectivity of all light of the 2nd wavelength Device.

Figure 10 and Figure 11 is to represent respectively when not having optical wavelength selective filter 92 and have optical wavelength selective filter The figure of light path when 92.

As shown in Figure 10, when without optical wavelength selective filter 92, green light that optical wavelength conversion chip is sent and red In coloured light, the light for being radiated into the opposite side of outgoing surface side is diffused into lighting device.

As shown in figure 11, the blue light that optical wavelength selective filter 92 sends blue led passes through, and makes in light wavelength conversion Some or all reflections of the light of the opposite side of outgoing surface side are radiated into green light and red light that piece is sent, are being had Project green light and red light in outgoing surface side near standby optical wavelength selective filter.Therefore, in optical wavelength selective filter Situation (i.e. no optical wavelength selective filter 92 of the band indigo plant degree compared to Figure 10 for the light that outgoing surface side near 92 is projected Situation) under outgoing surface side project light for mitigated.

Based on the principle, by waited near the end of lighting device with the strong part of blue degree (light-emitting component it is luminous Color influences strong part), optical wavelength selective filter 92 is partly configured, it is possible thereby to improve the color of lighting device not Uniformly.

During using optical wavelength selective filter 92, its with blue degree is reduced compared to the principle for following absorption blue light For his color adaptation method, it is able to carry out color adaptation in the case where light loss is small.

The transmitance that optical wavelength selective filter 92 is grown to the spike of the 1st wavelength is preferably more than 85%, more preferably More than 87%, more preferably more than 90%.

The reflectivity that optical wavelength selective filter 92 is grown to the spike of the 2nd wavelength is preferably more than 20%, more preferably More than 30%, more preferably more than 70%, particularly preferably more than 90%.

Optical wavelength selective filter 92 preferably meets following formula (1).Following formula (1) means that the wave band that light reflected and light are saturating The change of transmitance between the wave band crossed drastically, also, with | λ 2- λ 3 | reduce, more sharp change from the wave band of reflection For the wave band of transmission.From reflected waveband to the change through wave band (that is, in the case of the 3rd embodiment, from making blue led The wave band that the blue light that is sent passes through to make blue light changed by optical wavelength conversion chip obtained from as the 2nd emission wavelength The change of the wave band of the green light reflection of green wavelength) so drastically carry out, it is able to that indigo plant can be only transmitted selectivity efficient Coloured light and make it that green light, red light are reflected, be easy to cause that the effect of optical wavelength selective filter is real to the maximum limit It is existing.

| λ 2- λ 3 |≤50 (wherein, λ 1<λ 2, λ 1<λ3)(1)

λ1：The emission wavelength (nm) of light-emitting component

Optical wavelength selective filter 92 can also be laminated in optical wavelength conversion chip 91 for example as shown in figure 12.

Also with Fig. 1, Fig. 2 also, it is preferred that the exiting side in optical wavelength selective filter is provided with optics in 3rd embodiment Sheet material, particularly when being provided with prismatic lens, micro-lens sheet, polarizing brightness raising film as optical reflection film, preferably with light wave The transmitance at the wavelength X 3 of film is improved with brightness in direction when transmitance at the wavelength X 3 of long selection wave filter turns into maximum The mode for being less than 10 ° as the angle that direction during maximum is formed is configured.By making optical wavelength selective filter The transmitance that transmitance improves film as maximum direction and brightness is parallel as maximum direction, can make from brightness raising Film reflexes to optical wavelength conversion chip, the light of optical wavelength selective filter is effectively reflected by optical wavelength selective filter, suppresses it Light-emitting component is reflexed to, the even effect of the irregular colour of the lighting device that can be inhibited.

Other forms of 3rd embodiment are identical with the 1st embodiment.

(the 4th embodiment)

Figure 13 is the schematic diagram of the 4th embodiment of lighting device of the present invention.With optical wavelength conversion chip 131 and optical wavelength Wave filter 132 is selected, in the end of light guide plate 135, there is blue led 133 to be used as light-emitting component.

There is blue led 133, optical wavelength selective filter 132, optical wavelength conversion chip 131 successively.

Blue led 133 is possessed in a manner of with the interval of optical wavelength conversion chip 131.The light of blue led 133 is from leading The end of tabula rasa 135 enters, and is shot up while by light guide plate leaded light.Based on the principle, sent out towards optical wavelength conversion chip 131 Light extraction.

The area of optical wavelength selective filter 132 is preferably smaller than the area of optical wavelength conversion chip 131.Optical wavelength is selected to filter , can when the area of ripple device 132 is set smaller than the area of optical wavelength conversion chip 131 and is partially disposed in lighting device Partly adjust the color of the emergent light of lighting device well with efficiency, therefore preferably.

Other forms of 4th embodiment are identical with the 3rd embodiment.

(the 5th embodiment)

Using Figure 14~Figure 17, the 5th embodiment of one as lighting device of the present invention is illustrated.

Figure 14 is the schematic diagram of the 5th embodiment of lighting device of the present invention.Possesses the 1st optical wavelength conversion chip 146 and the 2nd Optical wavelength conversion chip 141, substrate 144 is provided with blue led 143 and is used as light-emitting component.In addition, come to reflect diffusion The light of light-emitting component, it is provided with reflecting plate 147 and diffuser plate 148.

Possess the 1st optical wavelength conversion chip 146, blue led 143, the 2nd optical wavelength conversion chip 141 successively.

Blue led 143 is possessed in a manner of with the interval of the 2nd optical wavelength conversion chip 141, is turned towards the 2nd optical wavelength It is luminous to change piece 141.

The area of 1st optical wavelength conversion chip 146 is preferably smaller than the area of the 2nd optical wavelength conversion chip 141.By the 1st optical wavelength The area of conversion sheet 146 is set smaller than the area of the 2nd optical wavelength conversion chip 141 and is partially disposed in lighting device It is interior, it can partly adjust the color of the emergent light of lighting device well with efficiency, therefore preferably.

Figure 15 and Figure 16 is selected when display does not have 1 optical wavelength selective filter 146 and with the 1st optical wavelength respectively The figure of light path during wave filter 146.

As shown in Figure 15, Figure 16, a part of quilt of the blue light sent from blue led towards the 2nd optical wavelength conversion chip 141 The surface reflection of diffuser plate 148, so as to be radiated into the side opposite with being emitted surface side.In addition, the surface of other optical sheets, The surface of 2nd optical wavelength conversion chip, also some reflected and injected to and the opposite side in outgoing surface side.Be radiated into The light of the opposite side in surface side is emitted by baffle reflection, and towards outgoing surface side, the process that a part therein is repeated below, That is, reflected again by the surface of the grade of diffuser plate 148, so as to be radiated into the side opposite with being emitted surface side.

As shown in figure 16, when there is 1 optical wavelength conversion chip 146, it is radiated into the blueness with outgoing surface side opposite side Light is converted into after green light, red light etc. have the light at peak at the wavelength different from the spike of blue wavelength length, is reflected Plate injects to outgoing surface side.When on the other hand, as shown in figure 15, without 1 optical wavelength conversion chip 146, it is radiated into and is emitted The blue light of surface side opposite side does not carry out wavelength convert and injects to outgoing surface side by reflecting plate.Therefore, compared to Figure 15 In the case of injected to (in the case of i.e. without the 1st optical wavelength conversion chip 146) outgoing surface side light for, there is the 1st light wave During long conversion sheet 146, the band indigo plant degree that the light of outgoing surface side is radiated near the 1st optical wavelength conversion chip 146 has subtracted Gently.

According to the principle, by waited near the end of lighting device with the strong part of blue degree (light-emitting component it is luminous Color influences strong part) optical wavelength conversion chip 146 is partly configured, the irregular colour that can improve lighting device is even.

During using 1 optical wavelength conversion chip 146, mitigate its with blue degree compared to the principle for following absorption blue light For his color adaptation method, it is able to carry out color adaptation in the case where light loss is small.

1st optical wavelength conversion chip 146 can also be laminated on reflecting plate as shown in figure 17.

1st optical wavelength conversion chip 146 can also be the wavelength conversion sheet containing quantum dot, fluorophor in reflecting plate. Sheet material containing quantum dot, fluorophor in reflecting plate turns into the sheet material with wavelength convert function and reflection function.

The shape of 1st optical wavelength conversion chip can be planar, or the shape in multiple holes is provided with the whole, can also To be netted, or circular, ellipse, the shape surrounded by other curves, triangle, quadrangle, other polygons etc. It is variously-shaped.

It should be noted that the 1st optical wavelength conversion chip is that the light of specific wavelength is converted into other wavelength as described above The sheet material of light, for example, contain quantum dot, the sheet material of fluorophor of the function with converting light wavelength.Can be in resin sheet The sub- point of amount, glimmering is laminated with containing quantum dot, the optical wavelength conversion chip of fluorophor or on the sheet material as base material The optical wavelength conversion chip of the film of body of light.In addition, reflecting plate can also be used as base material.It is laminated on the sheet material as base material Shape containing quantum dot, the film of fluorophor can be opened on the whole multiple holes shape or it is netted or It is laminated with being laminated into the state of the intervals such as point-like, can is circular, ellipse, the shape surrounded by other curves Shape, triangle, quadrangle, other polygons etc. are variously-shaped.

As optical wavelength conversion chip, the film that the sub- point of amount, fluorophor are laminated with the sheet material as base material is used During optical wavelength conversion chip, the area containing quantum dot, the film of fluorophor of the 1st optical wavelength conversion chip is preferably smaller than the 2nd optical wavelength The area containing quantum dot, the film of fluorophor of conversion sheet.By the film containing quantum dot, fluorophor of the 1st optical wavelength conversion chip Area be set smaller than the 2nd optical wavelength conversion chip containing quantum dot, the area of the film of fluorophor and it is partly configured When in lighting device, the color of the emergent light of lighting device can be partly adjusted well with efficiency, therefore preferably.

Other forms in 5th embodiment are identical with the 1st embodiment.

(the 6th embodiment)

Figure 18 is the schematic diagram of the 6th embodiment of lighting device of the present invention.Possesses the 1st optical wavelength conversion chip 186 and the 2nd Optical wavelength conversion chip 181, in the end of light guide plate 185, possess blue led 183 and be used as light-emitting component.

Possess the 1st optical wavelength conversion chip 186, blue led 183, the 2nd optical wavelength conversion chip 181 successively.

Blue led 183 is possessed in a manner of with the interval of the 2nd optical wavelength conversion chip 181.The light of blue led 183 from The end of light guide plate 185 enters, and is shot up while by light guide plate leaded light.Based on the principle, towards the 2nd optical wavelength conversion chip 181 send light.

The area of 1st optical wavelength conversion chip 186 is preferably smaller than the area of the 2nd optical wavelength conversion chip 181.By the 1st optical wavelength The area of conversion sheet 186 is set smaller than the area of the 2nd optical wavelength conversion chip 181 and is partially disposed in lighting device When, can with efficiency well partly adjust lighting device emergent light color.Therefore preferably.

Other forms in 6th embodiment are in a same manner as in the fifth embodiment.

Embodiment

Hereinafter, the present invention is described in detail by embodiment, but the invention is not restricted to these embodiments.Need what is illustrated It is that the assay method, evaluation method in the present embodiment are as follows.

[assay method and evaluation method]

(1) spectrophotometric spectra of lighting device

Using following spectroradio luminance meters, under the following conditions, in darkroom, lighting device A central portion is determined Spectrophotometric spectra.It is determined that during central portion, by the prism film (155mm × 98mm) set in lighting device A the top Central portion of the centre portion as lighting device A.In addition, by between the spectroradio luminance meter and display for lighting device away from From being arranged to 500mm.

(Konica Minolta senses Co., Ltd. (KONI CA MINOLTA to spectroradio luminance meter CS-1000A SENSING,INC))

Object lens：Macro lens

Mode determination：Automatically.

(2) spectral reflectance of optical wavelength selective filter

Sample is cut out with 50mm × 50mm size.Then, using spectrophotometer ((strain) Hitachi system, U- 4100 spectrophotometers), determine relative reflectance during incident angle Φ=10 degree.The inwall of subsidiary integrating sphere is sulfuric acid Barium, on-gauge plate are aluminum oxide.Measure wavelength is set as 250nm~1200nm, slit is arranged to 2nm (visible)/automatically control (infrared), ratio of profit increase (gain) are arranged to 2, are measured with the sweep speed of 600nm/ minutes.By the back side oiliness of sample Black painted black.

(3) spectral transmittance of optical wavelength selective filter, optical sheet

Sample is cut out with 50mm × 50mm size.To have used (strain) Hitachi spectrophotometer (U-4100 Spectrophotometer) basic structure of incidental integrating sphere carries out transmitance measure (0 ° of incidence angle).Measure is carried out as follows, The secondary blank for the aluminum oxide that device is attached is as benchmark, and as condition determination, slit is set as 2nm (visible)/automatically control (infrared), ratio of profit increase is set as 2, is measured with 600nm/min sweep speed.In addition, contain polarized light component in measure Transmitance when, the polariscopes of incidental Glan Tyler Corporations is set, after sample is fixed in a certain direction, makes polarization The every 5 ° of ground of mirror rotates, and determines transmitance, angle when measurement transmitance turns into maximum.

(4) spectrophotometric spectra of optical wavelength conversion chip

Sample is cut out with 50mm × 50mm size, by the back side of sample oiliness ink painted black, uses following point Spectrocolorimeter is measured.

Spectral photometric colour measuring meter CM-2600d (Konica Minolta senses Co. Ltd. system)

White correcting plate CM-A145 (Konica Minolta senses Co. Ltd. system)

Target cover (target mask) CM-146 (With).

(5) the chromaticity coordinates brightness of lighting device

Lighting device A is arranged to carry out the structure described in example 1~10, using following spectroradio luminance meters, under Under the conditions of stating in dark indoor measurement lighting device A central portion chromaticity coordinates (x values, y values).It is determined that during central portion, will shine The central portion for the prism film (155mm × 98mm) that bright device A the top is set is as central portion.In addition, illumination dress will to be used for The distance between spectroradio luminance meter and display for putting are set to 500mm.

Spectroradio luminance meter CS-1000A (Konica Minolta senses Co. Ltd. system)

Object lens：Macro lens

Mode determination：Automatically

(6) glossiness

According to method as defined in JIS-Z8741 (1997), Xu He test apparatuses company (Suga Test are used Instruments Co., Ltd) system digital angle Grossmeters UGV-5D, determine 60 ° of mirror surface lusters.Measure is with n=5's Mode is carried out, using the average value after removing maximum and minimum value as glossiness.

[lighting device (lighting device A) used in evaluation]

It is blue led as light source, is equipped with the lighting device A of optical wavelength conversion chip, uses Kindle Fire HDX 7 Backlight.The size of optical wavelength conversion chip is 158mm × 98mm.It should be noted that in embodiment 9, by lighting device A The optical wavelength conversion chip of carrying uses as the 2nd optical wavelength conversion chip.

Figure 19 is lighting device A simple diagram.Structure be with blue led 193, light guide plate 195, glossiness 930 it is anti- Penetrate film 197 (except embodiment 6), optical wavelength conversion chip 191, prismatic lens 199 (2).

Lighting device A spectrophotometric spectra is determined, result is the blue wavelength of the blue light sent from blue led in 450nm With peak, through optical wavelength conversion chip change obtained by the green wavelength of green light, red light red wavelength respectively 550nm, 610nm has peak.

[embodiment 1]

Optical wavelength selective filter A is obtained by method as follows.

As polyester A, the polyethylene terephthalate that inherent viscosity is 0.8 is used.In addition, as polyester B, use It is dispersed with 62 mass % copolyester (it is copolymerized the cyclohexanedimethanol for having 30mol%) and 38 mass % poly- terephthaldehyde The mixing tab (blend chip) of sour glycol ester.After these polyester A and polyester B are separately dried, extruder is supplied to.

Polyester A and polyester B is set to turn into 280 DEG C of molten condition respectively using extruder, while using gear pump to discharge Than being measured for the mode of polyester A compositions/polyester composition B=1.66/1, while via filter, charging is then utilized Head (feed block) is allowed to collaborate.Polyester A after interflow and polyester B are supplied in static mixer, entered using 501 layers Material head is allowed to collaborate, and is mutually laminated 501 layers in a manner of A/B/AB/A in a thickness direction and obtains layered product.

By such operation obtain by amount to 501 layers of layered product formed be supplied to T moulds and after being shaped to sheet, one side Apply electrostatic, while being quenched solidification on the curtain coating drum that surface temperature remains 25 DEG C.

The casting films of gained are heated using the roller group being set as from 85 DEG C to 100 DEG C, will after being longitudinally stretched 3.3 times Simple tension film is imported into stenter, after being preheated using 100 DEG C of hot blast, is drawn in 110 DEG C of temperature in width Stretch 3.8 times.Heat is carried out to the film after stretching using 150 DEG C of hot blasts with 3% relaxation rate (relax ratio) in stenter Processing, is batched after being slowly cooled to room temperature.Obtaining thickness, the stage in the range of 43~83nm becomes for 40 μm, the thickness of each layer The optical wavelength selective filter A of change.

Optical wavelength selective filter A spectral reflectance, spectral transmittance is determined, the result is that 450nm reflectivity is The transmitance that 69%, 550nm transmitance are 88%, 610nm is 90%.

Optical wavelength selective filter A is cut into 60mm × 98mm, configured optical wavelength conversion chip in lighting device A with Between prismatic lens.It is parallel with the long side of lighting device, optical wavelength selective filter A with 60mm side when being configured Central portion is configured as the mode of lighting device A central portion.It is determined that lighting device A central portion when, will be arranged at The central portion of prism film (155mm × 98mm) in lighting device A is as central portion.

Determine the chromaticity coordinates (x values, y values) when being configured with optical wavelength selective filter A, brightness and be configured without optical wavelength Chromaticity coordinates (x values, y values), brightness during selection wave filter A, table 1 is recorded in by evaluation result.

[embodiment 2]

In addition to optical wavelength selective filter A allocation position being set between lighting device A 2 prismatic lenses, with Embodiment 1 equally operates, and determines the chromaticity coordinates (x values, y values) when being configured with optical wavelength selective filter A, brightness and does not match somebody with somebody Chromaticity coordinates (x values, y values), brightness when putting optical wavelength selective filter A.Evaluation result is shown in table 1.

[embodiment 3]

On the prismatic lens of embodiment 1, the polarization optical reflection film of degree of polarization 90% is set, with light selection wavelengths filters A Direction of transmitance when turning into maximum and polarization optical reflection film transmitance as it is maximum when direction it is mutually orthogonal according to 90 ° Mode is configured, and in addition, is operated similarly to Example 1, and measure is configured with chromaticity coordinates during optical wavelength selective filter A (x values, y values), brightness and chromaticity coordinates (x values, y values) when being configured without optical wavelength selective filter A, brightness.Evaluation is tied Fruit is shown in table 1.

[embodiment 4]

As optical wavelength selective filter B, the spiroglycol (spiroglycol) and 30mol% that have 25mol% will be copolymerized The copolyester of cyclohexane cyclohexanedimethanodibasic be used as polyester B, it is 70 μm to make thickness, by the thickness of each layer 76~145nm scope Interior phase change, is in addition operated similarly to Example 1, obtains optical wavelength selective filter B.

Optical wavelength selective filter B spectral reflectance, spectral transmittance is determined, the result is that 450nm transmitance is The reflectivity that 90%, 550nm reflectivity are 34%, 610nm is 90%.

Optical wavelength selective filter B is used as optical wavelength selective filter, by the configuration bit of optical wavelength selective filter Install between light guide plate and optical wavelength conversion chip for lighting device A, in addition, operate similarly to Example 1, measure configuration Chromaticity coordinates (x values, y values), brightness during optical wavelength selective filter B and when being configured without optical wavelength selective filter B Chromaticity coordinates (x values, y values), brightness.Evaluation result is recorded in table 1.

[embodiment 5]

On the prismatic lens of embodiment 4, the polarization optical reflection film of degree of polarization 90% is set, with light selection wavelengths filters B Direction of transmitance when turning into maximum and polarization optical reflection film transmitance as it is maximum when the parallel mode in direction enter Row configuration, is in addition operated similarly to Example 4, and measure is configured with chromaticity coordinates (x values, y during optical wavelength selective filter B Value), brightness and chromaticity coordinates (x values, y values) when being configured without optical wavelength selective filter B, brightness.Evaluation result is recorded In table 1.

[embodiment 6]

In addition to the reflectance coating of embodiment 4 to be arranged to the white films of glossiness 32, operate, survey similarly to Example 4 Chromaticity coordinates (x values, y values), brightness when being configured with optical wavelength selective filter B surely and it is configured without optical wavelength selective filter Chromaticity coordinates (x values, y values) during B, brightness.Evaluation result is recorded in table 1.

[embodiment 7]

Concave-convex surface is set by the following method on optical wavelength selective filter B.

First, paint 1 is applied on optical wavelength selective filter B, forms the film of 5 μm of thickness.

(paint 1)

Adeka Optomer KRM-2199 (rising sun electrochemical industry (strain) system) 10 mass parts

Aron Oxetane OXT-221 (East Asia synthesis (strain) system) 1 mass parts

Adeka Optomer SP170 (rising sun electrochemical industry (strain) system) 0.25 mass parts

On the face of the paint 1 is coated with, it is pressed against the cross sectional shape perpendicular with long side direction and is carved with multiple concave grooves Mould, from the back side of coated face using extra-high-pressure mercury vapour lamp with 300mJ/cm²Ultraviolet is irradiated, solidifies paint, removes mould Tool, obtains lens shape.Herein, it is 2 μm that the lens shape obtained, which has spacing, is highly 1 μm of prism shape.

Then, the bottom of optical wavelength conversion chip is configured in a manner of the lens shape of formation turns into upper surface.

Other structures are set similarly to Example 4, and measure is configured with chromaticity coordinates (x during optical wavelength selective filter B Value, y values), brightness and chromaticity coordinates (x values, y values) when being configured without optical wavelength selective filter B, brightness.By evaluation result It is recorded in table 1.

[embodiment 8]

Yi Shi Man system " OB-1 " 0.1 mass % as fluorescent whitening agent of addition in polyester B, in addition with reality Apply example 4 equally to operate, determine the chromaticity coordinates (x values, y values) when being configured with optical wavelength selective filter B, brightness and be configured without Chromaticity coordinates (x values, y values) during optical wavelength selective filter B, brightness.Its evaluation result is recorded in table 1.

[embodiment 9]

1st optical wavelength conversion chip A is obtained by method as follows.

After the vacuum drying of the mass parts of particle 100 of polyethylene terephthalate, supply to be heated to 250 DEG C~ 300 DEG C of extruder A, polyester layer (first layer) is formed, meanwhile, in order to be formed in the compound film forming apparatus with extruder B Polyester layer (second layer) and proceed as follows, i.e. in the mass parts of polyethylene terephthalate raw material 77.5 dried In polymethylpentene resin (following, sometimes referred to simply as PMP) 20 mass parts for the Mitsui Chemicals, Inc.'s system dried, it is blended in The master batch added with fluorophor (relative to master batch total amount, is contained using 400 μ g/g and is used as fluorescence in polyethylene terephthalate " Lumogen " the F Yellow083 of BASF AG of body) 2.5 mass parts, with the total of polyethylene terephthalate raw material Measure the mode that the PMP contents in 100 mass % are 20 mass %, fluorophor is 10 μ g/g to be prepared, by the poly- terephthaldehyde After sour glycol ester material vacuum is dried, it is supplied in the extruder B for being heated to 250~300 DEG C, is melted, imported into T moulds Three layers with combining nozzle.

Using trilaminate device, make these polymer with as A layers (first layer)/B layers (second layer)/A layers (first Layer) mode carry out trilaminate, be sheet by T mold formings.The cooling drum that surface temperature is 10 DEG C~40 DEG C is recycled to make this Laminar film is cooled and solidified, and thus obtained unstretching film is imported into and is heated in 70~98 DEG C of roller group, is indulged along long side direction After 3.3 times of stretching, by chill roll, then, while the both ends of the film through vertical stretching are held on cloth gripper, it is conducted into In stenter, in 120 DEG C of atmosphere is heated to, in the direction horizontal stretching 3.6 times perpendicular with length direction.Afterwards in tentering 180~240 DEG C of heat-fixing temperature processing is carried out in machine, obtains the film that thickness is 150 μm.

In addition to using the 1st optical wavelength conversion chip A and configuring between lighting device A reflecting plate and light guide plate, with Embodiment 1 equally operates, and determines the chromaticity coordinates (x values, y values) when being configured with the 1st optical wavelength conversion chip A, brightness and does not match somebody with somebody Chromaticity coordinates (x values, y values), brightness when putting the 1st optical wavelength conversion chip A.Evaluation result is recorded in table 1.

[embodiment 10]

In order to form polyester layer (second layer), in the mass parts of polyethylene terephthalate raw material 79.75 dried In the mass parts of polymethylpentene resin 20 for the Mitsui Chemicals, Inc.'s system dried, polyethylene terephthalate is blended in In (relative to master batch total amount, contained using 400 μ g/g added with the master batch of fluorophor and be used as BASF AG of fluorophor " Lumogen " F Yellow 083) 0.25 mass parts, with the mass % of total amount 100 of polyethylene terephthalate raw material PMP contents be 20 mass %, the mode that fluorophor is 1 μ g/g prepared, in addition operate similarly to Example 4, make Film forming, the 1st optical wavelength conversion chip B is made.

In addition to using the 1st optical wavelength conversion chip B and configuring between lighting device A reflecting plate and light guide plate, with Embodiment 1 equally operates, and determines the chromaticity coordinates (x values, y values) when being configured with the 1st optical wavelength conversion chip B, brightness and does not match somebody with somebody Chromaticity coordinates (x values, y values), brightness when putting the 1st optical wavelength conversion chip B.Evaluation result is recorded in table 1.

[evaluation]

Based on above-described embodiment, measure and the evaluation of device are illuminated.It the results are shown in table 1.In addition, in fig. 20 Show xy chromatic diagrams.

As shown in being recorded table 1, optical wavelength selective filter A, B, the situation of the 1st optical wavelength conversion chip A, B are configured with, is compared For situation about being configured without, one of x values, y values are identical and another one becomes big, or both and becomes big.X values, y values Change maximum is embodiment 2, next to that embodiment 1.

Herein, as shown in Figure 20 xy chromatic diagrams, the coordinate position with the strong color of blue degree is x values, the value of y values diminishes Direction, on the contrary, with blue degree mitigate refer to x values, the value of y values change greatly.

Optical wavelength selective filter A, B, the situation of the 1st optical wavelength conversion chip A, B are configured with, compared to the feelings being configured without For condition, one of x values, y values are identical and another one increases, or the two increases, i.e. mitigate with blue degree, illuminating In device with the strong part of blue degree near, partly configure optical wavelength selective filter A, B, the 1st optical wavelength conversion chip A, B When, the irregular colour that can adjust lighting device is even.

[table 1]

Description of reference numerals

11st, 21,31,81,91,131,191 optical wavelength conversion chip

141st, 181 the 2nd optical wavelength conversion chip

32nd, 82,92,132 optical wavelength selective filter

13rd, 23,33,83,93,133,143,183,193 blue led

14th, 24,34,94,144 substrate

85th, 135,185,195 light guide plate

146th, 186 the 1st optical wavelength conversion chip

17th, 37,97,147,187,197 reflecting plate

18th, 28,38,98,148 diffuser plate

19th, 29 optical sheet

199 prismatic lenses

20 liquid crystal panels (display panel)

30 lighting devices

Claims

1. lighting device, it is the lighting device for possessing optical wavelength conversion chip, optical wavelength selective filter and light-emitting component, its It is characterised by,

The lighting device possesses light-emitting component, optical wavelength conversion chip and optical wavelength selective filter successively,

The area of the optical wavelength selective filter is smaller than the area of the optical wavelength conversion chip,

The light-emitting component is possessed in a manner of with the optical wavelength conversion chip interval.

2. lighting device, it is the lighting device for possessing optical wavelength conversion chip, optical wavelength selective filter and light-emitting component, its It is characterised by,

The lighting device possesses light-emitting component, optical wavelength selective filter and optical wavelength conversion chip successively,

3. lighting device, it is the lighting device for possessing the 1st optical wavelength conversion chip, the 2nd optical wavelength conversion chip and light-emitting component, Characterized in that,

The lighting device possesses the 1st optical wavelength conversion chip, light-emitting component, the 2nd optical wavelength conversion chip successively,

The area of 1st optical wavelength conversion chip is smaller than the area of the 2nd optical wavelength conversion chip,

The light-emitting component is possessed in a manner of with the 2nd optical wavelength conversion chip interval.

4. lighting device as claimed in claim 1 or 2, it is characterised in that the optical wavelength selective filter meets following formula (1),

|λ2-λ3|≤50 (1)

Wherein, λ 1<λ 2, λ 1<λ 3,

λ1：The emission wavelength (nm) of light-emitting component,

λ2：The transmitance of optical wavelength selective filter turns into the wavelength (nm) when 70%,

5. such as lighting device according to any one of claims 1 to 3, it is characterised in that the optical wavelength selective filter and/ Or the surface of the optical wavelength conversion chip has concaveconvex shape.

6. lighting device as claimed in claim 1 or 2, it is characterised in that corresponding to the entire surface of the optical wavelength conversion chip, It is provided with multiple light-emitting components.

7. lighting device as claimed in claim 3, it is characterised in that corresponding to the entire surface of the 2nd optical wavelength conversion chip, It is provided with multiple light-emitting components.

8. lighting device as claimed in claim 1 or 2, it is characterised in that the lighting device is also equipped with light guide plate, described to lead Tabula rasa is configured at the light path from the light-emitting component untill the optical wavelength conversion chip for the light that the light-emitting component is sent In.

9. lighting device as claimed in claim 3, it is characterised in that the lighting device is also equipped with light guide plate, the leaded light Plate is configured at the light path from the light-emitting component untill the 2nd optical wavelength conversion chip for the light that the light-emitting component is sent In.

10. lighting device as claimed in claim 8 or 9, it is characterised in that along the end of the light guide plate, be provided with more The individual light-emitting component.

11. such as lighting device according to any one of claims 1 to 3, it is characterised in that

The lighting device also improves film containing brightness,

And brightness raising film was arranged to than appointing in light-emitting component, optical wavelength conversion chip, optical wavelength selective filter Part anticipate closer to exiting side.

12. lighting device as claimed in claim 11, it is characterised in that

Film is improved with the brightness in direction when transmitance at the wavelength X 3 of the optical wavelength selective filter turns into maximum The angle that direction when transmitance at wavelength X 3 turns into maximum is formed is less than 10 °.

13. lighting device as claimed in claim 11, it is characterised in that

Film is improved with the brightness in direction when transmitance at the wavelength X 3 of the optical wavelength selective filter turns into maximum The angle that direction when transmitance at wavelength X 3 turns into maximum is formed is more than 80 °.

14. such as lighting device according to any one of claims 1 to 3, it is characterised in that

The lighting device also reflectance coating containing normal reflection,

And the reflectance coating of the normal reflection is arranged to than light-emitting component, optical wavelength conversion chip, optical wavelength selective filter In any part closer to the opposite side of exiting side.

15. display device, it is the display dress for possessing display panel and the lighting device being disposed adjacent with the display panel Put, it is characterised in that the lighting device is the lighting device any one of claim 1~14.