JP2006332269A5

JP2006332269A5 -

Info

Publication number: JP2006332269A5
Application number: JP2005152753A
Authority: JP
Filing date: 2005-05-25
Publication date: 2007-12-06

Description

本発明は、上記目的を達成するため、発光素子の発光に基づいて生じる青色光を波長変換して、前記青色光と異なる波長領域の光を外部放射させる発光装置において、前記青色光を放射するＬＥＤ素子と、前記青色光の放射に基づいて励起されて前記青色光と異なる第２の発光波長の光を放射する、一般式Ｍ’_ａＭ’’_ｂＭ’’’_ｃＯ_ｄで表される２つの発光ピークを有する緑色蛍光体と、前記青色光の放射に基づいて励起されて前記青色光と異なる第３の発光波長の光を放射する、一般式Ｍ’Ｍ’’ＳiＮ_３：Ｅｕ^２＋で表される赤色蛍光体とを含む波長変換部とを有することを特徴とするバックライト用発光装置を提供する。 In order to achieve the above object, the present invention radiates the blue light in a light-emitting device that externally emits light in a wavelength region different from the blue light by converting the wavelength of the blue light generated based on light emission of the light-emitting element. and LED element, are excited to emit light of a second emission wavelength different from that of the blue light based on the radiation of the blue light, it is represented by the general formula _{_{M 'a M''b M}} ''' c O d And a general formula M′M ″ SiN ₃ : Eu that emits light of a third emission wavelength different from that of the blue light, which is excited based on the emission of the blue light, and a green phosphor having two emission peaks. Provided is a backlight light emitting device comprising a wavelength conversion unit including a red phosphor represented by ²⁺ .

また、本発明は、上記目的を達成するため、発光素子の発光に基づいて生じる第１の光を波長変換して、前記第１の光と異なる波長領域の第２の光を外部放射させる発光装置において、発光に基づいて第１の発光波長の光を放射するＬＥＤ素子と、前記第１の発光波長の光の放射に基づいて励起されて前記第１の発光波長の光と異なる第２の発光波長の光を放射する緑色変換金属錯体と、前記第１の発光波長の光の放射に基づいて励起されて前記第１の発光波長の光と異なる第３の発光波長の光を放射する、一般式Ｍ’Ｍ’’ＳiＮ_３：Ｅｕ^２＋で表される赤色蛍光体とを含む波長変換部とを有することを特徴とするバックライト用発光装置を提供する。 In order to achieve the above object, according to the present invention, the first light generated based on the light emission of the light emitting element is wavelength-converted, and the second light having a wavelength region different from that of the first light is emitted to the outside. In the apparatus, an LED element that emits light having a first emission wavelength based on light emission, and a second element that is excited based on radiation of light having the first emission wavelength and is different from light having the first emission wavelength. A green-converting metal complex that emits light of an emission wavelength, and is excited based on the emission of light of the first emission wavelength and emits light of a third emission wavelength different from the light of the first emission wavelength; There is provided a light emitting device for a backlight having a wavelength conversion unit including a red phosphor represented by a general formula M′M ″ SiN ₃ : Eu ²⁺ .

Claims

In a light emitting device that converts the wavelength of blue light generated based on light emission of a light emitting element to emit light in a wavelength region different from the blue light to the outside,
An LED element that emits blue light;
Are excited to emit light of a second emission wavelength different from that of the blue light based on the radiation of the blue light, the formula _{_{M 'a M''b M}} ''' 2 one light emitting represented by _c O _d a green phosphor having a peak, is excited to emit light in the third emission wavelength different from that of the blue light based on the radiation of the blue light, the general formula M'M''SiN _3: represented by Eu ²⁺ backlight light-emitting device and having a wavelength conversion unit includes a red phosphor that.

In the light emitting device for converting the wavelength of the first light generated based on the light emission of the light emitting element and emitting the second light in a wavelength region different from the first light to the outside,
An LED element that emits light of a first emission wavelength based on emission;
A green-converting metal complex that is excited based on radiation of light of the first emission wavelength and emits light of a second emission wavelength different from the light of the first emission wavelength; and light of the first emission wavelength A red phosphor represented by a general formula M′M ″ SiN ₃ : Eu ²⁺ , which is excited based on the radiation of the first light and emits light having a third emission wavelength different from the light having the first emission wavelength. And a wavelength conversion unit including the light- emitting device for backlight .

The light emitting device for backlight according to claim 1, wherein the LED element is a blue LED element that emits light having an emission peak of 450 to 455 nm as the blue light.

The light emission for backlight according to claim 1, wherein the wavelength conversion unit includes a red phosphor layer provided to cover a surface of the LED element, and a green phosphor layer laminated on the red phosphor layer. apparatus.

The wavelength converter includes a first phosphor layer containing the red phosphor on the substrate side of the flip-chip type LED element, and a second phosphor containing the green phosphor laminated on the first phosphor layer. The backlight light- emitting device according to claim 1, wherein the second phosphor layer is mounted on a mounting surface.