JP2006338901A - Illumination device, and display device - Google Patents

Illumination device, and display device Download PDF

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JP2006338901A
JP2006338901A JP2005159132A JP2005159132A JP2006338901A JP 2006338901 A JP2006338901 A JP 2006338901A JP 2005159132 A JP2005159132 A JP 2005159132A JP 2005159132 A JP2005159132 A JP 2005159132A JP 2006338901 A JP2006338901 A JP 2006338901A
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light
phosphor
wavelength
light source
film
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JP4469307B2 (en
JP2006338901A5 (en
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Shin Kurihara
慎 栗原
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Seiko Instruments Inc
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Seiko Instruments Inc
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Priority to KR1020060048639A priority patent/KR20060125535A/en
Priority to CNB2006100886111A priority patent/CN100559066C/en
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<P>PROBLEM TO BE SOLVED: To achieve brightness efficiency and very high color reproducibility by effectively using a wavelength of a component to be cut by a color filter in an illumination device used for a liquid crystal display device or the like. <P>SOLUTION: This is a fluorescent film forming a phosphor layer in which phosphor particles mixed with a binder are applied on a translucent film base material. In these phosphor particles, the wavelength to be absorbed by the color filter has an excitation wavelength, and the emitting light wavelength is made to be in a region to be transmitted by the color filter. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

本発明は、携帯情報機器や携帯電話などに用いられる表示素子を照明する照明装置、及びこれを用いた表示装置に関する。詳しくは照明装置に用いる蛍光体フィルムに関する。   The present invention relates to an illuminating device that illuminates a display element used in a portable information device, a cellular phone, and the like, and a display device using the same. Specifically, the present invention relates to a phosphor film used for an illumination device.

近年では携帯電話やモバイルコンピュータなどに用いられる表示装置として、高精彩カラー画像が少ない消費電力で得られる液晶表示装置が用いられている。液晶表示素子は、それ自体は発光しない非自発光型の表示素子であるため照明装置を必要する。この照明装置には、高輝度白色ＬＥＤを照明装置用光源として多用されている。   In recent years, liquid crystal display devices that can obtain high-definition color images with low power consumption have been used as display devices used in mobile phones and mobile computers. Since the liquid crystal display element is a non-self-luminous display element that does not emit light by itself, an illumination device is required. In this illumination device, a high-intensity white LED is frequently used as a light source for the illumination device.

特に携帯電話では、開口が大きく明るい反射型液晶表示装置や、表裏両面から画像情報を表示することが可能な両面可視型液晶表示装置が用いられている。これらの表示装置には照明装置として、白色ＬＥＤを光源としたフロントライトやバックライトが用いられている。この白色ＬＥＤは、青色の光を発光する青色ＬＥＤを黄色蛍光体が分散された樹脂覆った構成であり、蛍光体から発する緑色光または黄色光と元の青色光とを混色させて補色関係で白色光を得ている（例えば、特許文献１を参照）。そして液晶表示装置では、この白色ＬＥＤから発光した光を液晶パネル中に備えられたＲＧＢのカラーフィルターと、液晶素子のスイッチング機能により必要な色を選択し、表示している。
特開平１０−１０７３２５号公報 In particular, mobile phones use a reflective liquid crystal display device with a large opening and a bright double-sided visible liquid crystal display device capable of displaying image information from both the front and back sides. In these display devices, a front light or a backlight using a white LED as a light source is used as a lighting device. This white LED has a configuration in which a blue LED that emits blue light is covered with a resin in which a yellow phosphor is dispersed, and green light or yellow light emitted from the phosphor is mixed with the original blue light in a complementary color relationship. White light is obtained (see, for example, Patent Document 1). In the liquid crystal display device, the light emitted from the white LED is selected and displayed by the RGB color filter provided in the liquid crystal panel and the switching function of the liquid crystal element.
JP-A-10-107325

液晶表示装置の照明装置に用いられている従来の白色ＬＥＤの波長分布は、青色の光と黄色または緑色の光による混色の白色光であるため、４５０ｎｍと５８０ｎｍをピークにブロードに広がっている。それに対して、液晶表示装置などに用いられるカラーフィルターが選択する波長のピークは青が４５０ｎｍ、緑が５３０ｎｍ、赤が６００ｎｍである。つまり、白色光源からの光のうち、４８０ｎｍ〜５１０ｎｍ、５７０ｎｍ〜５９０ｎｍの光に関しては、カットされてしまい、カットされた波長の光はカラーフィルターにより吸収されていた。そこで、本発明は、カラーフィルターでカットされる成分の波長を有効に使い、OLE_LINK1輝度効率と非常に高い色再現性を実現する照明装置を提供することOLE_LINK1を目的とする。   Since the wavelength distribution of the conventional white LED used in the illumination device of the liquid crystal display device is a mixed color white light by blue light and yellow or green light, it broadens with a peak at 450 nm and 580 nm. On the other hand, the wavelength peaks selected by color filters used in liquid crystal display devices are 450 nm for blue, 530 nm for green, and 600 nm for red. That is, among the light from the white light source, the light of 480 nm to 510 nm and 570 nm to 590 nm is cut, and the light of the cut wavelength is absorbed by the color filter. Accordingly, an object of the present invention is to provide an illumination device that effectively uses the wavelength of a component cut by a color filter and realizes OLE_LINK1 luminance efficiency and extremely high color reproducibility.

本発明の照明装置は、透光性のフィルム基材上に結合剤に混合された蛍光体粒子を塗布した蛍光体層が形成された蛍光体フィルムを備える構成とした。この蛍光体粒子は、カラーフィルターにより吸収される波長を励起波長とし、蛍光体粒子の発光波長はカラーフィルターで透過される領域に属している。   The illuminating device of the present invention includes a phosphor film in which a phosphor layer in which phosphor particles mixed with a binder are applied on a light-transmitting film base. In this phosphor particle, the wavelength absorbed by the color filter is an excitation wavelength, and the emission wavelength of the phosphor particle belongs to the region transmitted by the color filter.

本発明は、カラーフィルターにより吸収される光を、カラーフィルターを透過する光に変換する蛍光体フィルムを用いるため、輝度効率が高い照明装置が実現できる。また蛍光体を白色光源に含まれる量の少ない波長に変換するものを選択することにより、色再現性の非常に高い照明装置が実現できる。つまり、多用途での光源光の波長変換に用いることができ、色光源の低消費電力化、色再現の向上を促進できるという効果を有する。   Since the present invention uses a phosphor film that converts light absorbed by the color filter into light that passes through the color filter, a lighting device with high luminance efficiency can be realized. In addition, by selecting a phosphor that converts a phosphor into a wavelength with a small amount contained in a white light source, an illumination device with very high color reproducibility can be realized. In other words, it can be used for wavelength conversion of light source light for various purposes, and has the effect of facilitating the reduction of power consumption and improvement of color reproduction of the color light source.

本発明の照明装置は、光源と、光源からの光を入射して出射面から出射する導光体と、蛍光体が分散された結合剤を含んだ蛍光体層が表面に設けられた透光性フィルムを有する蛍光体フィルムと、導光体の出射面側に設けられた光学素子を備えており、蛍光体は、光源から出射される光の波長領域のうち光学素子を通過しない領域の光を励起して、光学素子を通過する波長の光に変換する特性を有している。   The illuminating device of the present invention includes a light source, a light guide that receives light from the light source and exits from an exit surface, and a light-transmitting light provided with a phosphor layer that includes a binder in which the phosphor is dispersed. A phosphor film having a conductive film and an optical element provided on the light exit surface side of the light guide, and the phosphor is light in a region not passing through the optical element in a wavelength region of light emitted from the light source. Is converted into light having a wavelength that passes through the optical element.

蛍光体フィルムは、光源と導光体の間、導光体の出射面の上方、のいずれかに設けられている。また、蛍光体フィルムには、蛍光体層を覆うように非通水性材料層を形成してもよい。   The phosphor film is provided either between the light source and the light guide, or above the light exit surface of the light guide. In addition, a non-water-permeable material layer may be formed on the phosphor film so as to cover the phosphor layer.

また、本発明の表示装置は、光源と、光源から入射した光を出射面から出射する導光体と、蛍光体が分散された結合剤を含んだ蛍光体層が表面に設けられた透光性フィルムを有する蛍光体フィルムと、導光体の出射面側に設けられた表示素子を備え、蛍光体は、光源から出射される光の波長領域のうち表示素子に形成されたカラーフィルターでカットされる領域の光を励起して、カラーフィルターを通過する波長の光に変換する特性を備えることとした。   Further, the display device of the present invention has a light source, a light-transmitting body that emits light incident from the light source from an output surface, and a light-transmitting light provided with a phosphor layer including a binder in which the phosphor is dispersed. A phosphor film having a conductive film and a display element provided on the light exit surface side of the light guide, and the phosphor is cut by a color filter formed on the display element in the wavelength range of light emitted from the light source It was decided to provide the property of exciting the light in the region to be converted into light having a wavelength that passes through the color filter.

さらに、光源は可視光域にピークを２つ含む擬似白色光を発光し、カラーフィルターはＲ、Ｇ、Ｂで構成され、蛍光体は４８０〜４９０ｎｍの光を励起して６００ｎｍに変換するように構成されている。   Furthermore, the light source emits pseudo white light having two peaks in the visible light range, the color filter is composed of R, G, and B, and the phosphor excites 480 to 490 nm light to convert it to 600 nm. It is configured.

あるいは、光源は可視光域にピークを２つ含む擬似白色光を発光し、蛍光体は一方のピークの波長域の光を励起して、２つのピーク以外の波長域の光に変換するように構成されている。   Alternatively, the light source emits pseudo white light including two peaks in the visible light region, and the phosphor excites light in one peak wavelength region and converts it into light in a wavelength region other than the two peaks. It is configured.

以下に蛍光体フィルム、照明装置及び表示装置に関して、図面を用いて具体的に説明する。   Hereinafter, the phosphor film, the illumination device, and the display device will be specifically described with reference to the drawings.

図１に本実施例の蛍光体フィルムの構成断面を模式的に示す。図示するように、蛍光体フィルム９は、蛍光体粒子４が結合剤２に混合されて透光性フィルム１の上に塗布されている。この結合剤２と蛍光体粒子４からなる層を蛍光体層と称す。蛍光体層の上には、蛍光体４を水分から保護するために非通水性材料層３が被覆されている。   FIG. 1 schematically shows a cross section of the phosphor film of this example. As shown in the figure, the phosphor film 9 is coated on the translucent film 1 with the phosphor particles 4 mixed with the binder 2. A layer composed of the binder 2 and the phosphor particles 4 is referred to as a phosphor layer. On the phosphor layer, a non-water-permeable material layer 3 is coated to protect the phosphor 4 from moisture.

蛍光体粒子４の材料は、用いる励起光波長と目的とする蛍光波長とによって適宜選択して用いる。例えば、一般的に液晶表示装置の照明装置に用いられている白色ＬＥＤを励起光とした場合は、図７に示すような２ピークの擬似白色光が用いられる。この場合、蛍光体粒子４としては、図８に示すような４８０〜４９０ｎｍの光（曲線１５）を６００ｎｍ（曲線１６）に変換する蛍光体を用いる。そして励起光である擬似白色光の強度を調整すれば、図９に示すように、励起光と波長変換された光との加法混色によって所望の色度を持った光が得られる。また発光する光を例えば白色ＬＥＤからの発光の割合が低い６２５ｎｍをピークとする蛍光体を選択した場合には、より長波長の光が含まれた波長分布とすることができ、色再現性が高い照明装置とすることができる。   The material of the phosphor particles 4 is appropriately selected depending on the excitation light wavelength to be used and the target fluorescence wavelength. For example, when a white LED generally used in a lighting device of a liquid crystal display device is used as excitation light, two-peak pseudo white light as shown in FIG. 7 is used. In this case, as the phosphor particles 4, a phosphor that converts 480 to 490 nm light (curve 15) to 600 nm (curve 16) as shown in FIG. 8 is used. Then, by adjusting the intensity of the pseudo white light that is the excitation light, as shown in FIG. 9, light having a desired chromaticity can be obtained by additive color mixture of the excitation light and the wavelength-converted light. In addition, when a phosphor having a peak at 625 nm, which emits light from a white LED, for example, is selected as the light to be emitted, the wavelength distribution can include a longer wavelength light, and color reproducibility can be improved. It can be set as a high illuminating device.

蛍光体粒子４は、基体、付活体及び溶剤からなる。基体は亜鉛、カドミニウム、マグネシウム、シリコン、イットリウム等の希土類元素等の酸化物、硫化物、珪酸塩、バナジン酸等の無機蛍光体又はフルオレセイン、エオシン、油類（鉱物油）等の有機蛍光体から選択される。付活体は、銀、銅、マンガン、クロム、ユウロピウム、亜鉛、アルミニウム、鉛、リン、砒素、金から選択される。前記溶剤は塩化ナトリウム、塩化カリウム、炭酸マグネシウム、塩化バリウムから選択される。透光性フィルム１は、２５〜５００μｍ程度の厚みを有する透光性高分子材料から形成されている。この透光性高分子材料としては、ＰＥＴ（ポリエチレンテレフタレート）、ＰＣ（ポリカーボネート）、アクリル樹脂、ＴＡＣ（トリアセチルセルロース）などの通常の樹脂を用いることができる。結合剤２には、アクリル系接着剤やエポキシ系接着剤など透光性の接着剤を用いることができる。これらの接着剤は、熱硬化型接着剤でも紫外線硬化型接着剤でも自然硬化型接着剤でも良い。   The phosphor particles 4 are composed of a substrate, an activator, and a solvent. The substrate is composed of oxides of rare earth elements such as zinc, cadmium, magnesium, silicon and yttrium, inorganic phosphors such as sulfides, silicates and vanadic acid, or organic phosphors such as fluorescein, eosin and oils (mineral oil). Selected. The activator is selected from silver, copper, manganese, chromium, europium, zinc, aluminum, lead, phosphorus, arsenic, and gold. The solvent is selected from sodium chloride, potassium chloride, magnesium carbonate, and barium chloride. The translucent film 1 is formed from a translucent polymer material having a thickness of about 25 to 500 μm. As this translucent polymer material, ordinary resins such as PET (polyethylene terephthalate), PC (polycarbonate), acrylic resin, and TAC (triacetyl cellulose) can be used. As the binder 2, a translucent adhesive such as an acrylic adhesive or an epoxy adhesive can be used. These adhesives may be thermosetting adhesives, ultraviolet curable adhesives, or natural curable adhesives.

図２に本実施例の照明装置の構成を模式的に示す。本実施例では、光源を導光板の横に配置した、いわゆるサイドライト型の照明装置である。図示するように、光源６と導光板７の間に蛍光体フィルム９が設置されている。光源６から発光した光は、蛍光フィルム９を通り所望の波長へと変換される。そして、変換された光は導光体７に導波され、反射板８とプリズムシート５によって照明装置の出射面から出射される。蛍光体フィルム９は、実施例１のように、蛍光体粒子が結合剤に混合されてなる蛍光体層が透光性フィルム上に設けられた構成である。蛍光体フィルムは照明装置の光源と出射面の間のどこかに設けられていればよい。蛍光体フィルムが導光板の上に設けられた構成を図３に示す。この場合には、光源６から発光した光は導光体７に導波され、反射板８によって導光板から上方に出射される。この光が蛍光フィルム９を通り所望の波長へと変換され、変換された光がプリズムシート５を通って照明光となる。   FIG. 2 schematically shows the configuration of the illumination device of this embodiment. In this embodiment, a so-called sidelight type illumination device in which a light source is disposed beside a light guide plate. As shown in the figure, a phosphor film 9 is installed between the light source 6 and the light guide plate 7. The light emitted from the light source 6 passes through the fluorescent film 9 and is converted to a desired wavelength. Then, the converted light is guided to the light guide 7 and is emitted from the exit surface of the illumination device by the reflecting plate 8 and the prism sheet 5. As in Example 1, the phosphor film 9 has a configuration in which a phosphor layer in which phosphor particles are mixed with a binder is provided on a translucent film. The phosphor film only needs to be provided somewhere between the light source and the exit surface of the illumination device. FIG. 3 shows a configuration in which the phosphor film is provided on the light guide plate. In this case, the light emitted from the light source 6 is guided to the light guide 7 and is emitted upward from the light guide plate by the reflection plate 8. This light passes through the fluorescent film 9 and is converted to a desired wavelength, and the converted light passes through the prism sheet 5 and becomes illumination light.

図４に本実施例による表示装置の構成を模式的に示す。本実施例では、実施例２のサイドライト型の照明装置を表示装置のバックライトとして用いた実施例である。ここでは、表示素子として液晶表示素子を用いている。図示するように、光源６と導光板７の間に蛍光体フィルム９が設置されている。光源６から発光した光は、蛍光フィルム９を通り所望の波長へと変換される。そして、変換された光は導光体７と反射板８とプリズムシート５によって液晶表示素子１０の方向に導波され、液晶表示素子１０の内部に設けられたカラーフィルターによりフィルタリングされて、表示色を発光する。   FIG. 4 schematically shows the configuration of the display device according to this embodiment. In this example, the sidelight type illumination device of Example 2 is used as a backlight of a display device. Here, a liquid crystal display element is used as the display element. As shown in the figure, a phosphor film 9 is installed between the light source 6 and the light guide plate 7. The light emitted from the light source 6 passes through the fluorescent film 9 and is converted to a desired wavelength. The converted light is guided in the direction of the liquid crystal display element 10 by the light guide 7, the reflecting plate 8, and the prism sheet 5, and is filtered by a color filter provided inside the liquid crystal display element 10, thereby displaying the display color. Is emitted.

図６に液晶表示素子のカラーフィルターの透過率特性を示す。カラーフィルター中の青色カラーフィルターの透過光特性を曲線１１に、緑色カラーフィルターの透過特性を曲線１２に、赤色カラーフィルターの透過特性を曲線１３に示している。そして、曲線１１と曲線１２の重なる領域、および、曲線１２と曲線１３の重なる領域がカット領域１４となる。図７に白色ＬＥＤの波長特性を示す。ここで、図６と図７を見ると、光源となる白色ＬＥＤの波長の二次ピークは約５５０ｎｍであるが、これはカラーフィルターのカット波長域にあるため、非常にエネルギー効率が悪いことがわかる。   FIG. 6 shows the transmittance characteristics of the color filter of the liquid crystal display element. The transmitted light characteristic of the blue color filter in the color filter is shown as a curve 11, the transmission characteristic of the green color filter is shown as a curve 12, and the transmission characteristic of the red color filter is shown as a curve 13. A region where the curve 11 and the curve 12 overlap and a region where the curve 12 and the curve 13 overlap become the cut region 14. FIG. 7 shows the wavelength characteristics of the white LED. Here, when looking at FIG. 6 and FIG. 7, the secondary peak of the wavelength of the white LED serving as the light source is about 550 nm, but this is in the cut wavelength range of the color filter, so it may be very inefficient in energy. Recognize.

図８に本発明の蛍光フィルムの波長変換特性の一例を示す。曲線１５は蛍光フィルムの励起波長を示しており、４８０ｎｍにピークを有する。図６からもわかる通り、この波長は大部分がカラーフィルターによりカットされる領域に位置している。つまり、蛍光フィルムの励起波長となる光の多くは、カラーフィルターにより吸収されてしまう。一方、蛍光体フィルムにより発光される発光波長（曲線１６）は赤色カラーフィルターの透過波長の領域に位置する。つまり、赤色の表示を行う際に励起された波長の光はカラーフィルターに吸収されずに有効に使われることになる。   FIG. 8 shows an example of wavelength conversion characteristics of the fluorescent film of the present invention. Curve 15 shows the excitation wavelength of the fluorescent film, and has a peak at 480 nm. As can be seen from FIG. 6, most of this wavelength is located in a region cut by the color filter. That is, much of the light that becomes the excitation wavelength of the fluorescent film is absorbed by the color filter. On the other hand, the emission wavelength (curve 16) emitted by the phosphor film is located in the region of the transmission wavelength of the red color filter. That is, the light of the wavelength excited when performing red display is effectively used without being absorbed by the color filter.

蛍光フィルムの蛍光体を選択する際、励起波長としては５８０ｎｍにピークを有しているものを選択しても良い。また発光波長のピークを、４８０ｎｍ〜５１０ｎｍ、５７０ｎｍ〜５９０ｎｍを避けていればよい。つまり、蛍光フィルムの蛍光体として、カラーフィルターにより吸収される領域を有するもの、そして励起波長のピークが吸収の大きい領域を避けたものとすれば良く、本発明により光源からの光を有効利用できるものとなる。   When selecting the phosphor of the fluorescent film, an excitation wavelength having a peak at 580 nm may be selected. The peak of the emission wavelength may be avoided from 480 nm to 510 nm and 570 nm to 590 nm. In other words, the phosphor of the fluorescent film may have a region that is absorbed by the color filter, and a region where the excitation wavelength peak has a large absorption may be avoided, and the light from the light source can be effectively used according to the present invention. It will be a thing.

また、蛍光体の励起波長を６００ｎｍ以上にピークを有するものとした場合には、光源が有する波長の強度が低い領域を補うことができるようになり、色再現性が高くなる。   In addition, when the excitation wavelength of the phosphor has a peak at 600 nm or more, it becomes possible to compensate for a region where the intensity of the wavelength of the light source is low, and the color reproducibility is improved.

図５に、導光体７の上面に蛍光フィルム９を配置した構成の表示装置を示す。また、導光体７と反射板８の間に蛍光フィルム９を置いても同様の効果が得られる。つまり、光源６から発せられた光が、液晶表示素子１０に達するまでの光路のいずれかに蛍光フィルム９が設置されていれば、本発明の効果を得ることができる。そして導光体７の上面には拡散板や複数のプリズムシートをおく場合もあり、必要な輝度、視野角特性に応じて組み合わせを使い分けている。   FIG. 5 shows a display device having a configuration in which the fluorescent film 9 is disposed on the upper surface of the light guide 7. Further, the same effect can be obtained by placing the fluorescent film 9 between the light guide 7 and the reflector 8. That is, the effect of the present invention can be obtained if the fluorescent film 9 is installed in any one of the optical paths until the light emitted from the light source 6 reaches the liquid crystal display element 10. In some cases, a diffusion plate or a plurality of prism sheets may be placed on the upper surface of the light guide 7, and combinations are properly used according to necessary luminance and viewing angle characteristics.

また、光源６として白色ＬＥＤを用いた場合を説明してきたが、ＣＣＦＬ（蛍光管）を用いてもよい。まれに、光源６に青色ＬＥＤを使用し、黄色発光の蛍光体を塗布したフィルムを導光体７上に配置し、白色光を得る手法をとる場合があるが、このようなケースにおいても、本発明は有効である。その場合、本発明における蛍光フィルム９は白色化した後の光路上に配置する必要がある。   Moreover, although the case where white LED was used as the light source 6 was demonstrated, you may use CCFL (fluorescent tube). In rare cases, a blue LED is used as the light source 6 and a film coated with a yellow-emitting phosphor is disposed on the light guide 7 to obtain a white light. In such a case, The present invention is effective. In that case, it is necessary to arrange | position the fluorescent film 9 in this invention on the optical path after whitening.

本発明による蛍光体フィルムの構成を模式的に示す断面図である。It is sectional drawing which shows typically the structure of the fluorescent substance film by this invention. 本発明による照明装置の構成を模式的に示す断面図である。It is sectional drawing which shows typically the structure of the illuminating device by this invention. 本発明による照明装置の構成を模式的に示す断面図である。It is sectional drawing which shows typically the structure of the illuminating device by this invention. 本発明による表示装置の構成を模式的に示す断面図である。It is sectional drawing which shows typically the structure of the display apparatus by this invention. 本発明による照明装置の構成を示す模式的断面図である。It is typical sectional drawing which shows the structure of the illuminating device by this invention. カラー液晶パネルのカラーフィルターの波長−透過率を示す図表である。It is a graph which shows the wavelength-transmittance of the color filter of a color liquid crystal panel. 白色ＬＥＤの波長−強度の相関を示す図表である。It is a graph which shows the correlation of the wavelength-intensity of white LED. 本発明で用いる蛍光フィルムの波長変換特性図の一例を示す図表である。It is a graph which shows an example of the wavelength conversion characteristic figure of the fluorescent film used by this invention. 蛍光フィルムと白色ＬＥＤを組み合わせたときの波長−強度特性を示す図表である。It is a graph which shows the wavelength-intensity characteristic when a fluorescent film and white LED are combined.

符号の説明Explanation of symbols

１ 透光性フィルム
２ 結合剤
３ 非通水性材料層
４ 蛍光体粒子
５ プリズムシート
６ 光源
７ 導光板
８ 反射板
９ 蛍光体フィルム DESCRIPTION OF SYMBOLS 1 Translucent film 2 Binder 3 Water-impermeable material layer 4 Phosphor particle 5 Prism sheet 6 Light source 7 Light guide plate 8 Reflector plate 9 Phosphor film

Claims (8)

光源と、
前記光源からの光を入射して、出射面から出射する導光体と、
蛍光体が分散された結合剤を含んだ蛍光体層と、前記蛍光体層が表面に設けられた透光性フィルムを有する蛍光体フィルムと、
前記導光体の出射面側に設けられた光学素子と、を備える照明装置であって、
前記蛍光体は、前記光源から出射される光の波長領域のうち前記光学素子を通過しない領域の光を励起して、前記光学素子を通過する波長の光に変換する特性を備えることを特徴とする照明装置。 A light source;
A light guide that enters the light from the light source and exits from the exit surface;
A phosphor layer containing a binder in which the phosphor is dispersed, and a phosphor film having a translucent film on which the phosphor layer is provided;
An optical device provided on the light exit surface side of the light guide,
The phosphor has a characteristic of exciting light in a region that does not pass through the optical element in a wavelength region of light emitted from the light source and converting it into light having a wavelength that passes through the optical element. Lighting device. 前記蛍光体フィルムが前記光源と前記導光体の間に設けられたことを特徴とする請求項１に記載の照明装置。   The lighting device according to claim 1, wherein the phosphor film is provided between the light source and the light guide. 前記蛍光体フィルムが前記導光体の出射面の上方に設けられたことを特徴とする請求項１に記載の照明装置。   The lighting device according to claim 1, wherein the phosphor film is provided above an emission surface of the light guide. 前記導光体の背後側に反射板を備えるとともに、前記蛍光体フィルムが前記導光体と前記反射板の間に設けられたことを特徴とする請求項１に記載の照明装置。   The lighting device according to claim 1, further comprising a reflector on a rear side of the light guide, and the phosphor film is provided between the light guide and the reflector. 前記蛍光体フィルムが、前記蛍光体層を覆うように形成された非通水性材料層を備えることを特徴とする請求項１〜４のいずれか一項に記載の照明装置。   The said fluorescent film is equipped with the water-impermeable material layer formed so that the said fluorescent substance layer might be covered, The illuminating device as described in any one of Claims 1-4 characterized by the above-mentioned. 光源と、
前記光源からの光を入射して、出射面から出射する導光体と、
蛍光体が分散された結合剤を含んだ蛍光体層と、前記蛍光体層が表面に設けられた透光性フィルムを有する蛍光体フィルムと、
前記導光体の出射面側に設けられた表示素子と、を備える表示装置であって、
前記蛍光体は、前記光源から出射される光の波長領域のうち前記表示素子に形成されたカラーフィルターでカットされる領域の光を励起して、前記カラーフィルターを通過する波長の光に変換する特性を備えることを特徴とする表示装置。 A light source;
A light guide that enters the light from the light source and exits from the exit surface;
A phosphor layer containing a binder in which the phosphor is dispersed, and a phosphor film having a translucent film on which the phosphor layer is provided;
A display device provided with a display element provided on an emission surface side of the light guide,
The phosphor excites light in a region cut by a color filter formed in the display element in a wavelength region of light emitted from the light source, and converts the light into light having a wavelength that passes through the color filter. A display device comprising characteristics. 前記光源は可視光域にピークを２つ含む擬似白色光を発光し、前記カラーフィルターはＲ、Ｇ、Ｂで構成され、前記蛍光体は４８０〜４９０ｎｍの光を励起して６００ｎｍに変換することを特徴とする請求項６に記載の表示装置。   The light source emits pseudo white light having two peaks in the visible light range, the color filter is composed of R, G, and B, and the phosphor excites 480 to 490 nm light and converts it to 600 nm. The display device according to claim 6. 前記光源は可視光域にピークを２つ含む擬似白色光を発光し、前記蛍光体は一方のピークの波長域の光を励起して、前記２つのピーク以外の波長域の光に変換することを特徴とする請求項６に記載の表示装置。   The light source emits pseudo white light including two peaks in the visible light region, and the phosphor excites light in one peak wavelength region and converts it into light in a wavelength region other than the two peaks. The display device according to claim 6.
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