JP2008287073A - Lighting device, display device and optical film - Google Patents

Lighting device, display device and optical film Download PDF

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JP2008287073A
JP2008287073A JP2007132876A JP2007132876A JP2008287073A JP 2008287073 A JP2008287073 A JP 2008287073A JP 2007132876 A JP2007132876 A JP 2007132876A JP 2007132876 A JP2007132876 A JP 2007132876A JP 2008287073 A JP2008287073 A JP 2008287073A
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light
wavelength
peak
specific wavelength
phosphor
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JP2008287073A5 (en
JP4976196B2 (en
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Shin Kurihara
慎 栗原
Takafumi Morihara
崇文 森原
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Seiko Instruments Inc
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Seiko Instruments Inc
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Abstract

<P>PROBLEM TO BE SOLVED: To easily achieve constitution for efficiently providing light of a required wavelength by cutting only light of unnecessary wavelength. <P>SOLUTION: An optical film is used which is equipped with a filter layer for selectively reflecting light of a specific wavelength and a phosphor layer including a phosphor that is excited by light of the specific wavelength and emits light. Thereby light reflected by the filter layer is converted to light of different wavelength by the phosphor layer and passes through the filter layer. By arranging the optical film between a display element and a lighting device, the phosphor layer converts a light component which is otherwise absorbed by the display element, so that the component can pass through the display element. Consequently the lighting device with very high luminance efficiency and color reproducibility can be achieved. <P>COPYRIGHT: (C)2009,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、あるいは、照明装置に用いる光学フィルムに関する。   The present invention relates to an illuminating device that illuminates a display element used in a portable information device, a mobile phone, and the like, and a display device using the illuminating device, or an optical film used in the illuminating 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。   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.

そして、導光体の出射面と表示パネルの間に、表示パネルを通過しない領域の光によって励起して、液晶パネルを通過する波長の光を発光する蛍光体を設けることにより、光源からの光の利用効率を向上する構成が知られている（例えば、特許文献２を参照）。   Then, the light from the light source is provided between the light exit surface of the light guide and the display panel by providing a phosphor that emits light having a wavelength that passes through the liquid crystal panel by being excited by light in a region that does not pass through the display panel. There is known a configuration for improving the use efficiency (see, for example, Patent Document 2).

また、一般照明用の光源として冷陰極管や白熱電球等が知られている。例えば冷陰極管は、電流が流れると蛍光管フィラメントから電子
が飛び出し、内部に封入されている気体の水銀
と衝突、紫外線
が発せられる。蛍光ガラス管の内側には蛍光体が塗布されており、紫外線
が当たると発光して、蛍光管外に可視光線
を放ち、これを照明に用いている。つまり、ガラス管内に塗布される蛍光体の特性と配合によって出光する光のスペクトラムが決定される。
特開平１０−１０７３２５号公報 特開２００６−３３８９０１号公報 In addition, cold cathode fluorescent lamps, incandescent lamps, and the like are known as light sources for general illumination. For example, in a cold cathode tube, when current flows, electrons are emitted from the fluorescent tube filament, collide with gaseous mercury enclosed therein, and ultraviolet rays are emitted. A fluorescent material is applied to the inside of the fluorescent glass tube, and emits light when irradiated with ultraviolet rays, and emits visible light to the outside of the fluorescent tube, which is used for illumination. That is, the spectrum of the emitted light is determined by the characteristics and composition of the phosphor applied in the glass tube.
JP-A-10-107325 JP 2006-338901 A

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の光は、カラーフィルターにより吸収されていた。そのため、光の利用効率が低く、輝度が低下していた。また、特許文献２に記載の構成では、液晶パネルに吸収される波長の全ての光が蛍光体にぶつかって色変換されるわけではないので、それほど利用効率を上げることができなかった。そこで、不要な波長の光を必要な波長の光に効率よく変換する必要がある。   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, light from 480 nm to 510 nm and 570 nm to 590 nm among the light from the white light source was absorbed by the color filter. For this reason, the light utilization efficiency is low and the luminance is lowered. Further, in the configuration described in Patent Document 2, not all light having a wavelength absorbed by the liquid crystal panel hits the phosphor and undergoes color conversion, so that the utilization efficiency could not be improved so much. Therefore, it is necessary to efficiently convert light having an unnecessary wavelength into light having a required wavelength.

一方、店舗照明等で、例えばりんごのように赤色成分を強調したいような被照体がある場合、緑色系成分は邪魔である。従来の照明用の光源には、不要な波長の光のみを排除し、かつ必要な波長の光をより強調するような機能はない。そのため、緑色系成分のみを排除し、赤色をより強調することは容易ではない。例えば、緑色系成分近辺をカットする顔料系の非常に濃度の濃いカラーフィルターを用いたり、複数の光源を用いたりすれば不可能ではない。しかし、消費電力や発熱やコストの問題があり、現実的ではない。   On the other hand, when there is an illuminated body such as an apple that wants to emphasize the red component in store lighting or the like, the green component is an obstacle. Conventional light sources for illumination do not have a function of excluding only light having an unnecessary wavelength and further emphasizing light having a required wavelength. For this reason, it is not easy to remove only the green component and to emphasize the red color more. For example, it is not impossible if a pigment-based color filter having a very high density or a plurality of light sources is used. However, there are problems of power consumption, heat generation and cost, which is not realistic.

これらの共通する課題を解決するために、本発明は、不要な波長の光のみをカットし、必要な波長の光を効率よく得られるような構成を容易に実現OLE_LINK1することOLE_LINK1を目的とする。   In order to solve these common problems, an object of the present invention is to OLE_LINK1 to easily realize a configuration in which only light having an unnecessary wavelength is cut and light having a required wavelength can be efficiently obtained. .

そこで、本発明は、特定波長の光を選択的に反射するフィルター層と、特定波長の光で励起して発光する蛍光体を含んだ蛍光体層を備え、フィルター層で反射された光を蛍光体層が異なる波長の光に変換することにより、フィルター層を透過させる光学フィルムを用いることとした。これにより、不要な波長の光のみをカットし、必要な波長の光を強調することが効率よく可能になる。   Therefore, the present invention includes a filter layer that selectively reflects light of a specific wavelength and a phosphor layer that includes a phosphor that emits light when excited by light of a specific wavelength, and the light reflected by the filter layer is fluorescent. An optical film that transmits the filter layer by converting the body layer into light having a different wavelength was used. As a result, it is possible to efficiently cut only the light with the unnecessary wavelength and emphasize the light with the required wavelength.

このような光学フィルムを照明装置に用いると、光源の発光のうち特定波長の光成分を反射させるとともに、特定波長の光成分を他の波長の光に変換して発光する照明装置になる。したがって、光源の光から特定波長の光成分を減少させ、他の波長の光成分を増やすことができる。   When such an optical film is used in an illuminating device, the illuminating device emits light by reflecting a light component having a specific wavelength among light emitted from a light source and converting the light component having a specific wavelength into light having another wavelength. Therefore, it is possible to reduce the light component of the specific wavelength from the light of the light source and increase the light component of other wavelengths.

さらに、発光部が、第一の波長にピークを持つ第一のピーク光と、第二の波長にピークを持つ第二のピーク光を発光する照明装置を用いて、前述の光学フィルムを発光部より出光側に配置し、フィルター層が反射する特定波長の光が、第一のピーク光と第二のピーク光の間の波長域の光になるような構成とした。このような構成により、光源のピーク波長の谷間の波長の光成分を蛍光体で変換してシフトすることができる。   Further, the light emitting unit uses the illumination device that emits the first peak light having a peak at the first wavelength and the second peak light having a peak at the second wavelength, and the above-described optical film is changed to the light emitting unit. The light is arranged on the light output side, and the light having a specific wavelength reflected by the filter layer is configured to be light in a wavelength region between the first peak light and the second peak light. With such a configuration, a light component having a wavelength between the peak wavelengths of the light source can be converted and shifted by the phosphor.

また、このような光学フィルムを表示素子の観察側とは反対側に設けた表示装置においては、表示素子で吸収される特定波長の光成分を光学フィルムのフィルター層で反射させて、特定波長の光成分を光学フィルムの蛍光体層で表示素子を透過できる波長の光に変換することが可能になる。   Further, in a display device in which such an optical film is provided on the side opposite to the viewing side of the display element, a light component having a specific wavelength absorbed by the display element is reflected by the filter layer of the optical film, and The light component can be converted into light having a wavelength that can be transmitted through the display element by the phosphor layer of the optical film.

さらに、光学フィルムの蛍光層側に照明装置を設け、照明装置の発光部が、第一の波長にピークを持つ第一のピーク光と、第二の波長にピークを持つ第二のピーク光を発光するとともに、特定波長が第一のピーク光と第二のピーク光の間の波長域にあることとした。   Furthermore, an illuminating device is provided on the fluorescent layer side of the optical film, and the light emitting portion of the illuminating device has a first peak light having a peak at the first wavelength and a second peak light having a peak at the second wavelength. While emitting light, the specific wavelength is in the wavelength region between the first peak light and the second peak light.

あるいは、表示素子は第一着色体と第二着色体を有するカラーフィルターを備え、特定波長が、第一着色体の透過波長域のピークと第二着色体の透過波長域の谷間の波長域を含むように構成する。   Alternatively, the display element includes a color filter having a first colored body and a second colored body, and the specific wavelength is a wavelength range between a peak of a transmission wavelength range of the first colored body and a valley of a transmission wavelength range of the second colored body. Configure to include.

あるいは、発光部と表示素子の間に、特定波長と異なる第二特定波長の光成分を反射する第二フィルター層を備える構成とした。さらに、第二特定波長の光で励起して発光する蛍光体を含んだ第二蛍光体層を、第二フィルター層と発光部の間に設ける構成とした。さらに、照明装置の発光部が、第三の波長にピークを持つ第三のピーク光を発光するとともに、第二特定波長が、第二のピーク光と第三のピーク光の間の波長域にあることとした。   Or it was set as the structure provided with the 2nd filter layer which reflects the optical component of the 2nd specific wavelength different from a specific wavelength between a light emission part and a display element. Further, a second phosphor layer containing a phosphor that emits light when excited with light of the second specific wavelength is provided between the second filter layer and the light emitting portion. Further, the light emitting unit of the lighting device emits the third peak light having a peak at the third wavelength, and the second specific wavelength is in a wavelength region between the second peak light and the third peak light. It was supposed to be.

あるいは、表示素子は第一着色体と第二着色体と第三着色体を有するカラーフィルターを備えており、特定波長と異なる第二特定波長の光成分を反射する第二フィルター層と、第二特定波長の光で励起して発光する蛍光体を含んだ第二蛍光体層を備え、特定波長が第一着色体の透過波長域のピークと第二着色体の透過波長域の谷間の波長域を含み、第二特定波長が第二着色体の透過波長域のピークと第三着色体の透過波長域の谷間の波長域を含むこととした。ここで、カラーフィルターがＲＧＢの着色層を持ち、特定波長が４８０ｎｍ〜５００ｎｍ、第二特定波長が５７０ｎｍ〜５９０ｎｍであり、蛍光体層は特定波長の光成分を緑色光に変換する緑蛍光体を含み、第二蛍光体層が第二特定波長の光成分を赤色光に変換する赤蛍光体を含むこととした。   Alternatively, the display element includes a color filter having a first colored body, a second colored body, and a third colored body, and a second filter layer that reflects a light component having a second specific wavelength different from the specific wavelength; Provided with a second phosphor layer containing a phosphor that emits light when excited by light of a specific wavelength, the specific wavelength is a wavelength range between the peak of the transmission wavelength range of the first colored body and the valley of the transmission wavelength range of the second colored body The second specific wavelength includes the wavelength range between the peak of the transmission wavelength range of the second colored body and the valley of the transmission wavelength range of the third colored body. Here, the color filter has an RGB colored layer, the specific wavelength is 480 nm to 500 nm, the second specific wavelength is 570 nm to 590 nm, and the phosphor layer is a green phosphor that converts a light component of the specific wavelength into green light. In addition, the second phosphor layer includes a red phosphor that converts a light component having the second specific wavelength into red light.

さらに、表示素子を照明する照明装置を備え、照明装置の発光部が、第一の波長にピークを持つ第一のピーク光と、第二の波長にピークを持つ第二のピーク光と、第三の波長にピークを持つ第三のピーク光を発光するとともに、特定波長が第一のピーク光と第二のピーク光の間の波長域にあり、第二特定波長が第二のピーク光と第三のピーク光の間の波長域にあることとした。   And a lighting device that illuminates the display element, wherein the light emitting unit of the lighting device includes a first peak light having a peak at the first wavelength, a second peak light having a peak at the second wavelength, The third peak light having a peak at the third wavelength is emitted, the specific wavelength is in a wavelength region between the first peak light and the second peak light, and the second specific wavelength is the second peak light. The wavelength range is between the third peak lights.

本発明によって、不要な波長の光のみをカットし、必要な波長の光を強調することが低消費電力かつ低コストで実現可能である。すなわち、カラーフィルターに吸収される光を、カラーフィルターを透過する光に変換する蛍光体を用いるため、輝度効率が高い照明装置や明るい表示装置が実現できる。   According to the present invention, it is possible to cut only light having an unnecessary wavelength and emphasize light having a necessary wavelength with low power consumption and low cost. That is, since a phosphor that converts light absorbed by the color filter into light that passes through the color filter is used, an illumination device or a bright display device with high luminance efficiency can be realized.

本発明の光学フィルムは、特定波長の光を選択的に反射するフィルター層と、特定波長の光で励起して発光する蛍光体を含んだ蛍光体層を備えている。これにより、フィルター層で反射された光が蛍光体層により異なる波長の光に変換され、フィルター層を透過するようになる。   The optical film of the present invention includes a filter layer that selectively reflects light of a specific wavelength, and a phosphor layer that includes a phosphor that emits light when excited by light of a specific wavelength. As a result, the light reflected by the filter layer is converted into light having a different wavelength by the phosphor layer and passes through the filter layer.

このような光学フィルムを照明装置に用いると、光源の発光のうち特定波長の光成分を反射させるとともに、特定波長の光成分を他の波長の光に変換して発光する照明装置になる。したがって、光源の光から特定波長の光成分を減少させ、他の波長の光成分を増やすことができる。また、光源の発光に含まれる量の少ない波長に変換する蛍光体を用いることにより、色再現性の非常に高い照明装置が実現できる。   When such an optical film is used in an illuminating device, the illuminating device emits light by reflecting a light component having a specific wavelength among light emitted from a light source and converting the light component having a specific wavelength into light having another wavelength. Therefore, it is possible to reduce the light component of the specific wavelength from the light of the light source and increase the light component of other wavelengths. In addition, by using a phosphor that converts to a wavelength with a small amount contained in light emitted from the light source, an illumination device with very high color reproducibility can be realized.

さらに、発光部が、第一の波長にピークを持つ第一のピーク光と、第二の波長にピークを持つ第二のピーク光を発光する照明装置を用いて、前述の光学フィルムを発光部より出光側に配置し、フィルター層が反射する特定波長の光が、第一のピーク光と第二のピーク光の間の波長域の光になるような構成とした。このような構成により、光源のピーク波長の谷間の波長の光成分を蛍光体で変換してシフトすることができる。   Further, the light emitting unit uses the illumination device that emits the first peak light having a peak at the first wavelength and the second peak light having a peak at the second wavelength, and the above-described optical film is changed to the light emitting unit. The light is arranged on the light output side, and the light having a specific wavelength reflected by the filter layer is configured to be light in a wavelength region between the first peak light and the second peak light. With such a configuration, a light component having a wavelength between the peak wavelengths of the light source can be converted and shifted by the phosphor.

また、このような光学フィルムを表示装置に用いると、すなわち、表示素子の観察側とは反対側に光学フィルムを設けることにより、表示素子で吸収される特定波長の光成分を光学フィルムのフィルター層で反射させて、特定波長の光成分を光学フィルムの蛍光体層で表示素子を透過できる波長の光に変換する。したがって、表示素子に吸収されて観測者に届かなかった光が光学フィルムによって届く光になるため、光の利用効率が向上する。   Further, when such an optical film is used in a display device, that is, by providing an optical film on the side opposite to the viewing side of the display element, a light component having a specific wavelength absorbed by the display element is filtered through the filter layer of the optical film. The light component having a specific wavelength is converted into light having a wavelength that can be transmitted through the display element by the phosphor layer of the optical film. Therefore, light that is absorbed by the display element and does not reach the observer becomes light that reaches the optical film, so that light use efficiency is improved.

また、光学フィルムの蛍光層側に照明装置を設ける。そして、特定波長の光成分を照明装置の光源に含まれる量の少ない波長等に変換する蛍光体を用いることにより、照明装置の色調（発光波長特性）を制御することが可能になる。このように、光源光の波長変換に広く用いることができ、色光源の低消費電力化、色再現の向上を促進できる。   An illumination device is provided on the fluorescent layer side of the optical film. And it becomes possible to control the color tone (light emission wavelength characteristic) of an illuminating device by using the fluorescent substance which converts the light component of a specific wavelength into the wavelength etc. with little quantity contained in the light source of an illuminating device. Thus, it can be widely used for wavelength conversion of light source light, and it is possible to promote reduction in power consumption and improvement in color reproduction of a color light source.

また、照明装置の発光部と表示素子の間に、特定波長と異なる第二特定波長の光成分を反射する第二フィルター層をもうける構成とした。そして、第二特定波長の光で励起して発光する蛍光体を含んだ第二蛍光体層を、第二フィルター層と発光部の間に設けることとした。このようにすれば、複数の特定波長の光を利用できる。   In addition, a second filter layer that reflects a light component having a second specific wavelength different from the specific wavelength is provided between the light emitting unit and the display element of the lighting device. Then, a second phosphor layer containing a phosphor that emits light when excited with light of the second specific wavelength is provided between the second filter layer and the light emitting portion. In this way, light of a plurality of specific wavelengths can be used.

また、表示素子にカラーフィルターが形成されている構成では、照明装置が発光する波長のうち、カラーフィルターを通過できない波長成分が存在する。したがって、この波長成分をほかの波長に変換することによって、カラーフィルターを通過する光の量を増やすことができ、明るさを向上することができる。   Further, in the configuration in which the color filter is formed on the display element, there is a wavelength component that cannot pass through the color filter among wavelengths emitted from the lighting device. Therefore, by converting this wavelength component into another wavelength, the amount of light passing through the color filter can be increased, and the brightness can be improved.

以下に波長制御フィルム、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 wavelength control film, the illumination device, and the display device will be specifically described with reference to the drawings.

本発明の波長制御フィルムの断面構成を図１に模式的に示す。図示するように、蛍光体８を含んだ蛍光層７と、特定波長の光を反射するフィルター層９がベースフィルム６に設けられている。蛍光層７は、透明樹脂等に蛍光体８が分散された構成である。この蛍光体８は、フィルター層９によって反射される波長を励起波長として、この励起波長と異なる波長の光を発光する特徴を有している。このような構成の波長制御フィルムを用いることにより、特定波長の光成分（蛍光体が発光する光）を増やすことができ、また、他の特定波長の光成分（フィルター層で反射される光）を減らすことができる。このとき、フィルター層が反射する波長域の少なくとも一部の波長域が、蛍光体の励起波長であるとよい。減らしたい光成分が増やしたい光成分に変換されるようになるためである。また、フィルター層９の上に拡散層を設けることによって、光の出射効率は上昇することが多い。   The cross-sectional structure of the wavelength control film of the present invention is schematically shown in FIG. As shown in the drawing, a fluorescent layer 7 including a phosphor 8 and a filter layer 9 that reflects light of a specific wavelength are provided on the base film 6. The fluorescent layer 7 has a configuration in which a phosphor 8 is dispersed in a transparent resin or the like. The phosphor 8 has a feature of emitting light having a wavelength different from the excitation wavelength, with the wavelength reflected by the filter layer 9 being an excitation wavelength. By using the wavelength control film having such a configuration, it is possible to increase the light component having a specific wavelength (light emitted from the phosphor), and to use another light component having a specific wavelength (light reflected by the filter layer). Can be reduced. At this time, at least a part of the wavelength range reflected by the filter layer may be the excitation wavelength of the phosphor. This is because the light component to be reduced is converted to the light component to be increased. In addition, providing a diffusion layer on the filter layer 9 often increases the light emission efficiency.

このような波長制御フィルムを用いて赤成分を強調する構成を例示する。波長制御フィルムの蛍光層７と蛍光管等の光源が互いに対向するように配置し、波長制御フィルムの蛍光層７と反射機構が光源を挟み込むように反射機構を配置する。反射機構は銀やアルミニウムを蒸着した反射シートでも、高反射アルミ板等の金属プレートでもかまわない。フィルター層９には５１０ｎｍ〜５４０ｎｍの光のみ反射するような特性を持たせ、蛍光層７には６００ｎｍ程度の赤色成分を発光する特性を持たせる。例えば、蛍光層７として３，１，５組成系のシリケート系の赤色蛍光体材料を塗布しておく。この蛍光体材料は５１０ｎｍ〜５４０ｎｍの光で効率よく励起して６００ｎｍ程度の赤色光を発光する。このような構成の作用を説明する。光源から蛍光層７に入射した光のうち蛍光体に当たった励起波長（５１０ｎｍ〜５４０ｎｍ）の光は赤色光に変換されてフィルター層を通過する。そして、蛍光体に当たらなかった励起波長の光はフィルター層９で反射され、再度蛍光層７に入射する。このとき蛍光体に当たった励起波長の光は６００ｎｍ程度の赤色成分に変換されるため、フィルター層９を透過する。一方、このとき蛍光体に当たらなかった励起波長の光は、再度反射機構によって蛍光層７、OLE_LINK4OLE_LINK5フィルター層９OLE_LINK4OLE_LINK5に入る。このように、反射と色変換を繰り返すことで、最終的には励起波長の光の多くは赤色光に変換されてフィルター層９を透過することになる。すなわち、不要な波長（５１０ｎｍ〜５４０ｎｍ）の光のみをカットし、必要な波長の光（６００ｎｍ程度）を強調することができる。   The structure which emphasizes a red component using such a wavelength control film is illustrated. The fluorescent layer 7 of the wavelength control film and the light source such as a fluorescent tube are arranged to face each other, and the reflection mechanism is arranged so that the fluorescent layer 7 of the wavelength control film and the reflection mechanism sandwich the light source. The reflection mechanism may be a reflection sheet deposited with silver or aluminum, or a metal plate such as a highly reflective aluminum plate. The filter layer 9 has a characteristic of reflecting only light of 510 nm to 540 nm, and the fluorescent layer 7 has a characteristic of emitting a red component of about 600 nm. For example, a silicate red phosphor material of 3,1,5 composition type is applied as the fluorescent layer 7. This phosphor material is efficiently excited by light of 510 nm to 540 nm and emits red light of about 600 nm. The operation of such a configuration will be described. Of the light incident on the fluorescent layer 7 from the light source, the light having an excitation wavelength (510 nm to 540 nm) that hits the phosphor is converted into red light and passes through the filter layer. Then, the light having the excitation wavelength that did not hit the phosphor is reflected by the filter layer 9 and enters the phosphor layer 7 again. At this time, the light having the excitation wavelength that hits the phosphor is converted into a red component of about 600 nm, and thus passes through the filter layer 9. On the other hand, the light of the excitation wavelength that did not hit the phosphor at this time enters the fluorescent layer 7 and the OLE_LINK4OLE_LINK5 filter layer 9OLE_LINK4OLE_LINK5 again by the reflection mechanism. Thus, by repeating the reflection and the color conversion, most of the light having the excitation wavelength is finally converted into red light and transmitted through the filter layer 9. That is, only light with an unnecessary wavelength (510 nm to 540 nm) can be cut, and light with a required wavelength (about 600 nm) can be emphasized.

蛍光管のみの場合、５１０ｎｍ〜５４０ｎｍの緑色成分が邪魔をして赤色が目立たなくなっていたのが、本実施例のような波長制御フィルムを使用することによって、緑色を排除し、赤色成分を目立たせることが可能となる。しかも、単にフィルターによる色吸収ではないため、光の利用効率の非常に高い照明装置が提供できる。   In the case of only the fluorescent tube, the green component of 510 nm to 540 nm was in the way and the red color was inconspicuous. By using the wavelength control film as in this example, the green color was eliminated and the red component was conspicuous. It becomes possible to make it. Moreover, since it is not simply color absorption by a filter, it is possible to provide an illumination device with very high light utilization efficiency.

ここで、ベースフィルム６にはＰＥＴやＰＥＳやアクリル等の透明樹脂、透明なガラス板を用いることができる。フィルター層９には、ＳｉＯ２ やＴｉＯ２ 等の屈折率の異なる薄膜を交互に数十層に積層させた多層膜、もしくは２００〜３００ｎｍ程度のナノ粒子を構造的に印刷した層を用いることができる。 Here, a transparent resin such as PET, PES, or acrylic, or a transparent glass plate can be used for the base film 6. The filter layer 9 may be a multilayer film in which thin films having different refractive indexes such as SiO 2 and TiO 2 are alternately laminated in several tens layers, or a layer in which nanoparticles of about 200 to 300 nm are structurally printed. it can.

本実施例の表示装置の構成を図面に基づいて説明する。図２は本実施例の表示装置の構成を模式的に示す断面図である。光源３は、青色ＬＥＤに緑発光と赤発光の蛍光体を混合した樹脂をポッティングした構成の３波長発光タイプのＬＥＤパッケ−ジである。導光体４は、光源から入射した光を導いて出光面から出射する。導光体４はポリカーボネート、アクリル、ゼオノアやアートン等の透明樹脂剤を射出成型によって作成したものである。導光体には、光源３と対向する部分に入光面が形成され、この入光面に、効率よく導光体４の内部に光が散乱するように微細なプリズム加工を施す場合がある。さらに、出光効率を高めるために、導光体４の出光面に拡散処理を施したり、プリズムをつけたりしてもよい。導光体の裏面、すなわち、出光面と反対側の導光体表面にはプリズム加工を光学設計に基づいて配置し、分布良く出光するような設計をしている。さらに、導光体４の裏面側に反射板５が配置されている。反射板５によって導光体４から一度漏れた光が再度導光体側に戻るため、光の利用効率が向上することとなる。ここで、反射板５には銀やアルミを蒸着したものや、白色ＰＥＴ等を用いることができる。一般的に、小型の製品には銀反射板を、大型の製品には白色ＰＥＴを用いることが多い。導光体４から出光した光は第一の波長制御フィルム１と第二の波長制御フィルム１１を通った後、表示素子２を通り、表示が観察される。表示素子２と第二の波長制御フィルム１１の間にプリズムシートや拡散シートを配置することもある。   The configuration of the display device of this embodiment will be described with reference to the drawings. FIG. 2 is a cross-sectional view schematically showing the configuration of the display device of this embodiment. The light source 3 is a three-wavelength light emitting type LED package in which a blue LED is mixed with a resin in which green and red phosphors are mixed. The light guide 4 guides the light incident from the light source and emits it from the light exit surface. The light guide 4 is formed by injection molding of a transparent resin agent such as polycarbonate, acrylic, zeonoa, or arton. In the light guide, a light incident surface is formed at a portion facing the light source 3, and fine prism processing may be applied to the light incident surface so that light is efficiently scattered inside the light guide 4. . Further, in order to increase the light output efficiency, the light output surface of the light guide 4 may be subjected to a diffusion treatment or a prism may be attached. Prism processing is arranged on the back surface of the light guide, that is, the light guide surface opposite to the light output surface, based on the optical design, and the light is output with a good distribution. Further, a reflector 5 is disposed on the back side of the light guide 4. Since the light once leaked from the light guide 4 by the reflecting plate 5 returns to the light guide again, the light use efficiency is improved. Here, the reflecting plate 5 may be made by vapor deposition of silver or aluminum, white PET, or the like. In general, silver reflectors are often used for small products, and white PET is often used for large products. The light emitted from the light guide 4 passes through the first wavelength control film 1 and the second wavelength control film 11, and then passes through the display element 2 so that the display is observed. A prism sheet or a diffusion sheet may be disposed between the display element 2 and the second wavelength control film 11.

第一の波長制御フィルム１は、図１で示した波長制御フィルムと基本的に同一の断面構成でよい。本実施例では、蛍光層７に分散された蛍光体８は、３８０ｎｍ〜５００ｎｍの青色光で励起して緑色に発光する蛍光体であり、II族金属チオガレートと希土類ドーパントとからなる蛍光材料や酸化物蛍光体と希土類ドーパントやＳｒ−ＳＩＯＮと希土類ドーパントや２，１，４，組成のシリケート蛍光体が例示できる。蛍光層７より観測者側に、一定の波長のみを反射する機能を持つフィルター層９が設けられている。フィルター層９の透過特性を図５に示す。図示するように、本実施例のフィルター層９は４８０ｎｍ〜５００ｎｍの範囲の波長を中心に反射するような構成となっている。   The first wavelength control film 1 may have basically the same cross-sectional configuration as the wavelength control film shown in FIG. In this embodiment, the phosphor 8 dispersed in the phosphor layer 7 is a phosphor that emits green light when excited by blue light of 380 nm to 500 nm, and is made of a phosphor material or an oxidation material composed of a group II metal thiogallate and a rare earth dopant. Illustrative are phosphors and rare earth dopants, Sr-SION and rare earth dopants, and silicate phosphors with 2,1,4 and compositions. A filter layer 9 having a function of reflecting only a certain wavelength is provided on the observer side from the fluorescent layer 7. The transmission characteristics of the filter layer 9 are shown in FIG. As shown in the figure, the filter layer 9 of this embodiment is configured to reflect around a wavelength in the range of 480 nm to 500 nm.

このような構成によれば、３波長発光タイプの光源から導光板を通って第一の波長制御フィルム１に入った光のうち、蛍光体８にぶつかった青色光は５３０ｎｍ近辺をピークに持つ緑色光に変換される。また、第一の波長制御フィルム１に入った光のうち、４８０ｎｍ〜５００ｎｍの光はフィルター層９によって反射され、それ以外の光はそのまま透過する。反射した４８０ｎｍ〜５００ｎｍの光は、反射板５や導光体４で再度反射されて第一の波長制御フィルム１に入射する。入射した４８０ｎｍ〜５００ｎｍの光のうち蛍光体８にぶつかった光は緑色光に変換されてフィルター層９を透過し、ぶつからなかった光はフィルター層９に再度反射される。このように、反射と波長変換を何度も繰り返すことで、最終的に４８０ｎｍ〜５００ｎｍの光のほとんどが５３０ｎｍにピークを持つ緑色光に変化することとなる。ここでは、不要な波長は４８０ｎｍ〜５００ｎｍの光であり、この光を利用して必要な緑色光（５３０ｎｍ程度）を強調することができる
次いで、第一の波長制御フィルム１から出た光は、第二の波長制御フィルム１１に入光する。第二の波長制御フィルム１１も図１で示した波長制御フィルムと基本的に同一の断面構成でよい。本実施例では、蛍光層７に分散された蛍光体８は、４００ｎｍ〜５９０ｎｍの青〜緑色光で励起して赤色に発光する蛍光体である。この赤色蛍光体として、希土類元素としてＥｕを添加したＳｒＳやＣａＳやＣａＡｌＳｉＮ３や３，１，５組成系のシリケートが例示できる。透明なベースフィルムに赤色蛍光体を塗布した構成でもよい。蛍光層より観測者側に設置する第二のフィルター層の特性を図６に示す。図示するように、本実施例の第二のフィルター層は５７０ｎｍ〜５９０ｎｍの波長を反射するように作製されている。したがって、フィルター層で反射された５７０ｎｍ〜５９０ｎｍのうち赤色蛍光体にぶつかった光は赤色光に変換されることとなり、フィルター層９を透過する。ぶつからなかった光はフィルター層９に再度反射される。すなわち、第一の波長制御フィルムの場合と同様、反射と色変換を繰り返すことにより、最終的には５７０ｎｍ〜５９０ｎｍの成分がほとんど存在しない光が出光する。ここでは、不要な波長は５７０ｎｍ〜５９０ｎｍの光であり、この光を利用して必要な赤色光を強調することができる。 According to such a configuration, of the light that has entered the first wavelength control film 1 through the light guide plate from the light source of the three-wavelength light emission type, the blue light that hits the phosphor 8 has a green color with a peak around 530 nm. Converted to light. Of the light entering the first wavelength control film 1, light of 480 nm to 500 nm is reflected by the filter layer 9 and other light is transmitted as it is. The reflected light of 480 nm to 500 nm is reflected again by the reflector 5 and the light guide 4 and enters the first wavelength control film 1. Of the incident light having a wavelength of 480 nm to 500 nm, the light hitting the phosphor 8 is converted into green light and transmitted through the filter layer 9, and the light not hitting is reflected again by the filter layer 9. Thus, by repeating reflection and wavelength conversion many times, most of the light of 480 nm to 500 nm finally changes to green light having a peak at 530 nm. Here, the unnecessary wavelength is light of 480 nm to 500 nm, and necessary green light (about 530 nm) can be emphasized using this light. Then, the light emitted from the first wavelength control film 1 is The light enters the second wavelength control film 11. The second wavelength control film 11 may have basically the same cross-sectional configuration as the wavelength control film shown in FIG. In this embodiment, the phosphor 8 dispersed in the phosphor layer 7 is a phosphor that emits red light when excited by blue to green light of 400 nm to 590 nm. Examples of the red phosphor include SrS, CaS, CaAlSiN 3 and 3,1,5 composition silicates to which Eu is added as a rare earth element. The structure which apply | coated red fluorescent substance to the transparent base film may be sufficient. FIG. 6 shows the characteristics of the second filter layer installed on the observer side from the fluorescent layer. As shown in the drawing, the second filter layer of this example is fabricated so as to reflect a wavelength of 570 nm to 590 nm. Therefore, the light that hits the red phosphor out of 570 nm to 590 nm reflected by the filter layer is converted to red light and passes through the filter layer 9. The light that did not hit is reflected again by the filter layer 9. That is, as in the case of the first wavelength control film, by repeating the reflection and the color conversion, finally light with almost no component of 570 nm to 590 nm is emitted. Here, the unnecessary wavelength is light of 570 nm to 590 nm, and necessary red light can be emphasized using this light.

上述した各フィルター層には、ＳｉＯ２ やＴｉＯ２ の屈折率の異なる薄膜を交互に数十層に積層させた多層膜などを用いることができる。または、２００〜３００ｎｍ程度のナノ粒子をベースフィルム上に印刷した構成でも同様の効果が得られる。また、フィルター層９の上に拡散層を設けることによって、光の出射効率は上昇することが多い。 For each filter layer described above, a multilayer film in which thin films having different refractive indexes of SiO 2 and TiO 2 are alternately stacked in several tens layers can be used. Or the same effect is acquired even if it is the structure which printed the nanoparticle about 200-300 nm on the base film. In addition, providing a diffusion layer on the filter layer 9 often increases the light emission efficiency.

前述のように、光源３は、緑発光と赤発光の蛍光体が混合された樹脂を青色ＬＥＤにポッティングした構成の３波長発光タイプのＬＥＤパッケ−ジである。図７に、本実施例の光源３の分光特性を示す。このような分光特性の光が、第一と第二の波長制御フィルムを通ることにより、図８に示すような分光特性に変化する。図８に示すように、二種類のフィルター層により４８０ｎｍ〜５００ｎｍ、５７０ｎｍ〜５９０ｎｍの波長の光がほとんどなくなっている。かわりに蛍光層により５３０ｎｍの緑色及び６３０ｎｍの赤色成分が増加していることがわかる。   As described above, the light source 3 is a three-wavelength light emitting type LED package in which a resin in which green light emission and red light emission phosphors are mixed is potted with a blue LED. FIG. 7 shows the spectral characteristics of the light source 3 of this embodiment. The light having such spectral characteristics changes to the spectral characteristics as shown in FIG. 8 through the first and second wavelength control films. As shown in FIG. 8, light of wavelengths of 480 nm to 500 nm and 570 nm to 590 nm is almost eliminated by the two types of filter layers. Instead, it can be seen that the green layer at 530 nm and the red component at 630 nm are increased by the fluorescent layer.

次に、表示素子２のカラーフィルターの特性を図９に示す。本図には、青色カラーフィルター特性１２と緑色カラーフィルター特性１３と赤色カラーフィルター特性１４が記されている。本図から、もともと４８０ｎｍ〜５００ｎｍ及び５７０ｎｍ〜５９０ｎｍの光は、フィルターによる吸収領域（カット領域）１５、１６に含まれる光であり、たとえ存在していてもほとんどカットされてしまう成分であることがわかる。つまり、本実施例による波長制御フィルムを用いることで、本来カット領域にある波長の光を有効な波長に変換することが可能となることがわかる。   Next, the characteristics of the color filter of the display element 2 are shown in FIG. In this figure, a blue color filter characteristic 12, a green color filter characteristic 13, and a red color filter characteristic 14 are shown. From this figure, the light of 480 nm to 500 nm and 570 nm to 590 nm originally is light contained in the absorption regions (cut regions) 15 and 16 by the filter, and it is a component that is almost cut even if it exists. Recognize. That is, it can be seen that by using the wavelength control film according to this example, it is possible to convert light having a wavelength originally in the cut region into an effective wavelength.

また、光源として３波長ＬＥＤを用いた場合を説明してきたが、ＣＣＦＬ（蛍光管）を用いても同様である。   Moreover, although the case where 3 wavelength LED was used as a light source has been demonstrated, it is the same also if CCFL (fluorescent tube) is used.

本実施例の構成を図３、４に基づいて説明する。図３は本実施例の構成を模式的に示す断面図である。実施例２と異なる点は、波長制御フィルム１の枚数とその構成である。実施例２と重複する部分の説明は適宜省略する。本実施例では波長制御フィルムを１枚しか使用していない。この波長制御フィルム１の断面構成を図４に模式的に示す。実施例２と同様に、蛍光体８を透明樹脂等に分散してなる蛍光層７をベースフィルム６に設ける。本実施例の蛍光層７には赤色蛍光体を分散している。蛍光層７より観測者側に第一のフィルター層９と第二のフィルター層１０を設けている。第一のフィルター層９は４８０ｎｍ〜５００ｎｍの波長の光を、第二のフィルター層１０は５７０ｎｍ〜５９０ｎｍの波長の光を反射するように作製されている。このような構成により、不要な波長の光（４８０ｎｍ〜５００ｎｍと５７０ｎｍ〜５９０ｎｍの光）をカットするだけでなく、赤色成分の光を増加することができる。   The configuration of this embodiment will be described with reference to FIGS. FIG. 3 is a cross-sectional view schematically showing the configuration of this embodiment. The difference from Example 2 is the number of wavelength control films 1 and their configuration. A description of the same parts as those in the second embodiment will be omitted as appropriate. In this embodiment, only one wavelength control film is used. A cross-sectional structure of the wavelength control film 1 is schematically shown in FIG. Similarly to Example 2, a fluorescent layer 7 in which a phosphor 8 is dispersed in a transparent resin or the like is provided on the base film 6. A red phosphor is dispersed in the phosphor layer 7 of this embodiment. A first filter layer 9 and a second filter layer 10 are provided on the observer side from the fluorescent layer 7. The first filter layer 9 is made to reflect light having a wavelength of 480 nm to 500 nm, and the second filter layer 10 is made to reflect light having a wavelength of 570 nm to 590 nm. With such a configuration, it is possible not only to cut light of unnecessary wavelengths (light of 480 nm to 500 nm and 570 nm to 590 nm) but also to increase red component light.

また、例えば、光源として青色ＬＥＤに黄色の蛍光体をポッティングした擬似白色ＬＥＤを使用すると、もともと存在していなかった赤色成分を付加することができる。   Further, for example, when a pseudo white LED in which a yellow phosphor is potted on a blue LED is used as a light source, a red component that did not originally exist can be added.

また、光源として青色ＬＥＤに赤色蛍光体をポッティングした紫ＬＥＤを使用し、蛍光層７に緑蛍光体を使用しても非常に輝度が高く、半値幅の狭いＲＧＢのピークを持つ照明装置の提供が可能となる。   In addition, even when a purple LED with a red LED potted on a blue LED is used as a light source and a green phosphor is used for the fluorescent layer 7, an illumination device having an RGB peak with a very high luminance and a narrow half-value width is provided. Is possible.

本発明による波長制御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 wavelength control film 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. 本発明による波長制御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 wavelength control film by this invention. 本発明による波長制御フィルムの第１のフィルター層の波長−透過率の関係を示す図表であるIt is a graph which shows the relationship of the wavelength-transmittance of the 1st filter layer of the wavelength control film by this invention. 本発明による波長制御フィルムの第２のフィルター層の波長−透過率の関係を示す図表であるIt is a graph which shows the relationship of the wavelength-transmittance of the 2nd filter layer of the wavelength control film by this invention. 三波長ＬＥＤの波長−強度の関係を示す図表である。It is a graph which shows the wavelength-intensity relationship of three wavelength LED. 本発明による波長制御フィルムと三波長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 the wavelength control film by this invention and three wavelength LED are combined. カラー液晶パネルのカラーフィルターの波長−透過率の関係を示す図表である。It is a graph which shows the relationship of the wavelength-transmittance of the color filter of a color liquid crystal panel.

符号の説明Explanation of symbols

１、１１ 波長制御フィルム
２ 表示素子
３ 光源
４ 導光体
５ 反射板
６ ベースフィルム
７ 蛍光層
８ 蛍光体
９、１０ フィルター層
１２ 青色カラーフィルター特性
１３ 緑色カラーフィルター特性
１４ 赤色カラーフィルター特性
１５、１６ カット領域 DESCRIPTION OF SYMBOLS 1,11 Wavelength control film 2 Display element 3 Light source 4 Light guide 5 Reflector 6 Base film 7 Fluorescent layer 8 Fluorescent substance 9, 10 Filter layer 12 Blue color filter characteristic 13 Green color filter characteristic 14 Red color filter characteristic 15, 16 Cut area

Claims (14)

特定波長の光を選択的に反射するフィルター層と、
前記特定波長の光で励起して発光する蛍光体を含んだ蛍光体層を備えるとともに、
前記フィルター層で反射された光を前記蛍光体層が異なる波長の光に変換することにより、前記フィルター層を透過させることを特徴とする光学フィルム。 A filter layer that selectively reflects light of a specific wavelength;
A phosphor layer including a phosphor that emits light by being excited by light of the specific wavelength,
An optical film characterized in that the light reflected by the filter layer is converted into light having a different wavelength by the phosphor layer, thereby allowing the filter layer to pass therethrough. 前記フィルター層は、屈折率の異なる薄膜を交互に積層した多層構造であることを特徴とする請求項１に記載の光学フィルム。   The optical film according to claim 1, wherein the filter layer has a multilayer structure in which thin films having different refractive indexes are alternately laminated. 前記フィルター層は、２００ｎｍ〜３００ｎｍのナノ粒子を積層印刷した層であることを特徴とする請求項１に記載の光学フィルム。   The optical filter according to claim 1, wherein the filter layer is a layer on which nanoparticles of 200 nm to 300 nm are stacked and printed. 請求項１に記載の光学フィルムを用いて光源の発光のうち特定波長の光成分を反射させるとともに、前記特定波長の光成分を他の波長の光に変換して発光することを特徴とする照明装置。   A light component having a specific wavelength of light emitted from a light source is reflected using the optical film according to claim 1, and the light component having a specific wavelength is converted into light having another wavelength to emit light. apparatus. 前記光学フィルムは発光部より出光側に配置され、
前記発光部が、第一の波長にピークを持つ第一のピーク光と、第二の波長にピークを持つ第二のピーク光を発光するとともに、
前記特定波長の光が、前記第一のピーク光と前記第二のピーク光の間の波長域の光であることを特徴とする請求項４に記載の照明装置。 The optical film is disposed on the light output side from the light emitting part,
The light emitting part emits first peak light having a peak at the first wavelength and second peak light having a peak at the second wavelength,
The lighting device according to claim 4, wherein the light having the specific wavelength is light in a wavelength region between the first peak light and the second peak light. 表示素子の観察側とは反対側に請求項１に記載の光学フィルムを設けることにより、前記表示素子で吸収される特定波長の光成分を前記光学フィルムのフィルター層で反射させて、前記特定波長の光成分を前記光学フィルムの蛍光体層で前記表示素子を透過できる波長の光に変換することを特徴とする表示装置。   By providing the optical film according to claim 1 on the side opposite to the observation side of the display element, a light component of a specific wavelength absorbed by the display element is reflected by a filter layer of the optical film, and the specific wavelength The light component is converted into light having a wavelength that can be transmitted through the display element by the phosphor layer of the optical film. 前記光学フィルムの蛍光層側に照明装置を設け、前記照明装置の発光部が、第一の波長にピークを持つ第一のピーク光と、第二の波長にピークを持つ第二のピーク光を発光するとともに、
前記特定波長が、前記第一のピーク光と前記第二のピーク光の間の波長域にあることを特徴とする請求項６に記載の表示装置。 An illumination device is provided on the fluorescent layer side of the optical film, and the light emitting unit of the illumination device has a first peak light having a peak at the first wavelength and a second peak light having a peak at the second wavelength. While emitting light,
The display device according to claim 6, wherein the specific wavelength is in a wavelength region between the first peak light and the second peak light. 前記表示素子は第一着色体と第二着色体を有するカラーフィルターを備え、
前記特定波長が、前記第一着色体の透過波長域のピークと前記第二着色体の透過波長域の谷間の波長域を含むことを特徴とする請求項６に記載の表示装置。 The display element includes a color filter having a first colored body and a second colored body,
The display device according to claim 6, wherein the specific wavelength includes a wavelength range between a peak of a transmission wavelength range of the first colored body and a valley of a transmission wavelength range of the second colored body. 前記発光部と前記表示素子の間に、前記特定波長と異なる第二特定波長の光成分を反射する第二フィルター層を備えることを特徴とする請求項７に記載の表示装置。   The display device according to claim 7, further comprising a second filter layer that reflects a light component having a second specific wavelength different from the specific wavelength between the light emitting unit and the display element. 前記第二特定波長の光で励起して発光する蛍光体を含んだ第二蛍光体層が、前記第二フィルター層と前記発光部の間に設けられたことを特徴とする請求項９に記載の表示装置。   The second phosphor layer including a phosphor that emits light by being excited by light of the second specific wavelength is provided between the second filter layer and the light emitting unit. Display device. 前記照明装置の発光部が、第三の波長にピークを持つ第三のピーク光を発光するとともに、前記第二特定波長が、前記第二のピーク光と前記第三のピーク光の間の波長域にあることを特徴とする請求項１０に記載の表示装置。   The light emitting unit of the illumination device emits third peak light having a peak at a third wavelength, and the second specific wavelength is a wavelength between the second peak light and the third peak light. The display device according to claim 10, wherein the display device is in a region. 前記カラーフィルターは第三着色体を有し、
前記特定波長と異なる第二特定波長の光成分を反射する第二フィルター層と、
前記第二特定波長の光で励起して発光する蛍光体を含んだ第二蛍光体層と、を備え、
前記第二特定波長が、前記第二着色体の透過波長域のピークと前記第三着色体の透過波長域の谷間の波長域を含むことを特徴とする請求項８に記載の表示装置。 The color filter has a third colored body,
A second filter layer that reflects a light component having a second specific wavelength different from the specific wavelength;
A second phosphor layer containing a phosphor that emits light when excited with light of the second specific wavelength,
The display device according to claim 8, wherein the second specific wavelength includes a wavelength range between a peak of a transmission wavelength range of the second colored body and a valley of a transmission wavelength range of the third colored body. 前記カラーフィルターがＲＧＢの着色層を持つカラーフィルターであり、
前記特定波長が４８０ｎｍ〜５００ｎｍ、前記第二特定波長が５７０ｎｍ〜５９０ｎｍであり、前記蛍光体層は前記特定波長の光成分を緑色光に変換する緑蛍光体を含み、前記第二蛍光体層が前記第二特定波長の光成分を赤色光に変換する赤蛍光体を含むことを特徴とする請求項１２に記載の表示装置。 The color filter is a color filter having an RGB colored layer,
The specific wavelength is 480 nm to 500 nm, the second specific wavelength is 570 nm to 590 nm, the phosphor layer includes a green phosphor that converts a light component of the specific wavelength into green light, and the second phosphor layer includes The display device according to claim 12, comprising a red phosphor that converts the light component of the second specific wavelength into red light. 前記表示素子を照明する照明装置を備え、
前記照明装置の発光部が、第一の波長にピークを持つ第一のピーク光と、第二の波長にピークを持つ第二のピーク光と、第三の波長にピークを持つ第三のピーク光を発光するとともに、
前記特定波長が前記第一のピーク光と前記第二のピーク光の間の波長域にあり、前記第二特定波長が、前記第二のピーク光と前記第三のピーク光の間の波長域にあることを特徴とする請求項１２または１３に記載の表示装置。 An illumination device for illuminating the display element;
The light emitting unit of the lighting device includes a first peak light having a peak at a first wavelength, a second peak light having a peak at a second wavelength, and a third peak having a peak at a third wavelength. While emitting light,
The specific wavelength is in a wavelength region between the first peak light and the second peak light, and the second specific wavelength is a wavelength region between the second peak light and the third peak light. The display device according to claim 12 or 13, wherein
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