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JP2003516558A - Display system with light emitting diode light source - Google Patents

Display system with light emitting diode light source

Info

Publication number
JP2003516558A
JP2003516558A JP2001543717A JP2001543717A JP2003516558A JP 2003516558 A JP2003516558 A JP 2003516558A JP 2001543717 A JP2001543717 A JP 2001543717A JP 2001543717 A JP2001543717 A JP 2001543717A JP 2003516558 A JP2003516558 A JP 2003516558A
Authority
JP
Japan
Prior art keywords
light emitting
display system
light
emitting diode
light source
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Abandoned
Application number
JP2001543717A
Other languages
Japanese (ja)
Inventor
エム マーシャル トーマス
デー パシュリー ミハエル
ハーマン スティーヴン
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Koninklijke Philips NV
Original Assignee
Philips Electronics NV
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Philips Electronics NV filed Critical Philips Electronics NV
Publication of JP2003516558A publication Critical patent/JP2003516558A/en
Abandoned legal-status Critical Current

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Classifications

    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
    • G09G3/34—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source
    • G09G3/3406—Control of illumination source
    • G09G3/3413—Details of control of colour illumination sources
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
    • G02B27/10—Beam splitting or combining systems
    • G02B27/14—Beam splitting or combining systems operating by reflection only
    • G02B27/145—Beam splitting or combining systems operating by reflection only having sequential partially reflecting surfaces
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
    • G02F1/1336—Illuminating devices
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
    • G02F1/1336—Illuminating devices
    • G02F1/133621—Illuminating devices providing coloured light
    • G02F1/133622—Colour sequential illumination
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N9/00—Details of colour television systems
    • H04N9/12—Picture reproducers
    • H04N9/31—Projection devices for colour picture display, e.g. using electronic spatial light modulators [ESLM]
    • H04N9/3102—Projection devices for colour picture display, e.g. using electronic spatial light modulators [ESLM] using two-dimensional electronic spatial light modulators
    • H04N9/3111—Projection devices for colour picture display, e.g. using electronic spatial light modulators [ESLM] using two-dimensional electronic spatial light modulators for displaying the colours sequentially, e.g. by using sequentially activated light sources
    • H04N9/3114—Projection devices for colour picture display, e.g. using electronic spatial light modulators [ESLM] using two-dimensional electronic spatial light modulators for displaying the colours sequentially, e.g. by using sequentially activated light sources by using a sequential colour filter producing one colour at a time
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N9/00—Details of colour television systems
    • H04N9/12—Picture reproducers
    • H04N9/31—Projection devices for colour picture display, e.g. using electronic spatial light modulators [ESLM]
    • H04N9/3141—Constructional details thereof
    • H04N9/315—Modulator illumination systems
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N9/00—Details of colour television systems
    • H04N9/12—Picture reproducers
    • H04N9/31—Projection devices for colour picture display, e.g. using electronic spatial light modulators [ESLM]
    • H04N9/3197—Projection devices for colour picture display, e.g. using electronic spatial light modulators [ESLM] using light modulating optical valves
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N9/00—Details of colour television systems
    • H04N9/64—Circuits for processing colour signals
    • H04N9/73—Colour balance circuits, e.g. white balance circuits or colour temperature control
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2310/00—Command of the display device
    • G09G2310/02—Addressing, scanning or driving the display screen or processing steps related thereto
    • G09G2310/0235—Field-sequential colour display

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Nonlinear Science (AREA)
  • Theoretical Computer Science (AREA)
  • Computer Hardware Design (AREA)
  • Mathematical Physics (AREA)
  • Chemical & Material Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Projection Apparatus (AREA)
  • Liquid Crystal (AREA)

Abstract

(57)【要約】 本発明の表示システムは、放出光のピーク値波長が互いにわずかに異なる少なくとも２つのＬＥＤ光源から成る光源装置を有する。別々のＬＥＤ光源を、エテンデューを殆ど又は全く増大せずにルーメン出力を増大させた単一ビームを生じるように合成させる。種々の色（例えば、赤色、緑色及び青色）のこのような合成ＬＥＤ光源は、例えば、小型の光変調器パネルの使用によってエテンデューが制限されている表示システムにおける光エンジンとして有用である。 (57) [Summary] The display system of the present invention has a light source device including at least two LED light sources whose peak wavelengths of emitted light are slightly different from each other. Separate LED light sources are combined to produce a single beam with increased lumen output with little or no increase in etendue. Such composite LED light sources of various colors (eg, red, green and blue) are useful, for example, as light engines in display systems where etendue is limited by the use of small light modulator panels.

Description

【発明の詳細な説明】Detailed Description of the Invention

【０００１】 発明の背景 本発明は表示システムに関するものであり、特に、互いに異なる波長の発光ダ
イオード（ＬＥＤ）の組み合わせを用いたＬＥＤ光源を具えた表示システムに関
するものである。BACKGROUND OF THE INVENTION The present invention relates to a display system, and more particularly to a display system having an LED light source using a combination of light emitting diodes (LEDs) having different wavelengths.

【０００２】 照明及び表示分野の商品を製造するのに、種々の色（例えば、赤色、緑色及び
青色）でルーメン出力を増大させたＬＥＤの有用性が高まっている。LEDs with increased lumen output in a variety of colors (eg, red, green and blue) are becoming increasingly useful in manufacturing products in the lighting and display fields.

【０００３】 通常の照明目的のために、例えば、赤色、緑色及び青色ＬＥＤを組み合わせて
白色光源を製造することは提案されている。米国特許第 5851063号明細書を参照
されたい。For normal lighting purposes, it has been proposed, for example, to combine red, green and blue LEDs to produce a white light source. See U.S. Pat. No. 5851063.

【０００４】 ヘルメット又は眼鏡上に装着され、フレーム順次方式で１つの光変調器パネル
を用いて動作する直視式小型表示装置内の光源として赤色、緑色及び青色ＬＥＤ
を用いることも提案されている。米国特許第 5808800号明細書を参照されたい。
このような分野では、ＬＥＤは、比較的小型で、電力消費が少なく、視聴者をし
て別々のカラー画像をフルカラー画像に統合させるのに充分速いフレームレート
でスイッチオン及びスイッチオフすることができるので、これらＬＥＤは魅力の
あるものである。Red, green and blue LEDs as light sources in a direct view small display device mounted on a helmet or glasses and operating with one light modulator panel in a frame sequential manner.
It is also proposed to use. See US Pat. No. 5,808,800.
In such fields, LEDs are relatively small, consume low power, and can be switched on and off at frame rates fast enough for the viewer to integrate separate color images into full color images. So these LEDs are attractive.

【０００５】 これら特性がＬＥＤを他の分野にも魅力のあるものにしている。特に、ＬＥＤ
が小型であることは、１つ以上の小型液晶光変調器パネルを採用するプロジェク
ションシステムのような、エテンデュー（etendue）が限定されたシステムに用
いるのにこれらＬＥＤを魅力のあるものにする。These properties make LEDs attractive in other fields as well. Especially LED
The small size of these LEDs makes them attractive for use in systems with limited etendue, such as projection systems that employ one or more small liquid crystal light modulator panels.

【０００６】 しかし、ＬＥＤのルーメン出力の増大が向上しているにもかかわらず、現段階
での改善では、個々のＬＥＤのルーメン出力は、ある分野では依然として所望値
よりも低い。数個の個々のＬＥＤを組み合わせてアレイ又は群にすることによっ
てルーメン出力をある程度増大させることができるが、このルーメン出力は特に
、プロジェクション表示システムの場合、依然として所望のルーメン出力よりも
低く、更なるルーメン出力の増大は表示システムのエテンデューによって制限さ
れてしまう。However, despite improvements in the lumen output of LEDs, the current improvement is that the lumen output of individual LEDs is still lower than desired in some areas. The lumen output can be increased to some extent by combining several individual LEDs into an array or group, but this lumen output is still below the desired lumen output, especially for projection display systems, and The increase in lumen output is limited by the etendue of the display system.

【０００７】 本発明の目的及び概要 従って、本発明の目的は、ＬＥＤに基づきルーメン出力を増大させた光源装置
を用いた表示システムを提供することにある。[0007] OBJECTS AND SUMMARY Accordingly the present invention, an object of the present invention is to provide a display system using a light source device with increased lumen output based the LED.

【０００８】 請求項１に規定した本発明による表示システムによって、前記の目的を達成す
る。The display system according to the invention as defined in claim 1 achieves the above object.

【０００９】 本発明は、個々のＬＥＤが、比較的狭いスペクトル（例えば約20nm）を有する
出力ビームを発生し、これらＬＥＤを広範囲内のいかなる所望のピーク値波長を
有するように製造でき、ピーク値波長が互いに異なる（その相違は少なくとも１
nm）もあまり相違させないＬＥＤの出力ビームを、エテンデューは殆ど又は全く
増大させないでルーメン出力を増大させたビームに合成しうるという認識を基に
成したものである。本明細書では、２つ以上のこのようなＬＥＤの組み合わせを
“ＬＥＤの組”と称する。The present invention allows individual LEDs to produce an output beam with a relatively narrow spectrum (eg, about 20 nm) and to produce these LEDs with any desired peak value wavelength within a wide range. Wavelengths are different from each other (the difference is at least 1
This is based on the recognition that the output beams of LEDs that do not differ much in nm) can be combined into beams with increased lumen output with little or no increase in etendue. A combination of two or more such LEDs is referred to herein as an "LED set".

【００１０】 更なる好適例は従属項に規定してある。 本発明によれば、ＬＥＤの少なくとも１つの組を有し、且つ、ＬＥＤの組の個
々のＬＥＤからの別々の出力ビームを、エテンデューを殆ど又は全く増大させず
にルーメン出力を増大させたビームに合成するためのダイクロイックフィルタの
ような手段をも有している表示システム用の光源装置が得られる。Further preferred examples are defined in the dependent claims. In accordance with the present invention, separate output beams from at least one set of LEDs and from individual LEDs of the set of LEDs are beams with increased lumen output with little or no increase in etendue. A light source device for a display system is obtained which also has means such as dichroic filters for synthesis.

【００１１】 本発明による表示システムには、光源装置の個々のＬＥＤのルーメン出力を増
大させることなく、本発明による表示システムのルーメン出力が増大するという
利点がある。The display system according to the invention has the advantage that the lumen output of the display system according to the invention is increased without increasing the lumen output of the individual LEDs of the light source device.

【００１２】 別々の出力ビームは、個々のＬＥＤによって、或いは、ピーク値の放出波長が
互いにほぼ同じＬＥＤの群又はアレイによって発生させることができる。本明細
書では、これら個々のＬＥＤ、ＬＥＤ群及びＬＥＤアレイを総称して“ＬＥＤビ
ーム源”又は“ＬＥＤ光源”と称する。The separate output beams can be generated by individual LEDs or by groups or arrays of LEDs with peak emission wavelengths approximately the same as one another. In the present specification, these individual LEDs, LED groups and LED arrays are collectively referred to as "LED beam source" or "LED light source".

【００１３】 本発明の表示システムの光源装置の一例では、ＬＥＤの組が、これとは異なる
色の１つ以上のＬＥＤビーム源及びＬＥＤの組の双方又はいずれか一方と組み合
わされて、色成分の波長に依存する合成光出力を発生するようになっている。表
示の色及び輝度の双方又はいずれか一方を変化させるために、色の出力レベルを
変化させるか、或いは周期的に色をスイッチオン及びスイッチオフさせるか、或
いはこれらの双方を行なう制御回路を設けることができる。In one example of a light source device of the display system of the present invention, a set of LEDs is combined with one or more LED beam sources and / or a set of LEDs of different colors to provide color components. It is designed to generate a combined light output depending on the wavelength. A control circuit is provided for changing the output level of the color and / or periodically switching the color on and off in order to change the display color and / or brightness. be able to.

【００１４】 本発明の好適例によれば、赤色、緑色及び青色ビームの別々の原色チャネルを
有する光源装置を具える表示システムであって、１つ以上のこれらの色のチャネ
ルがＬＥＤの組によって発生され、且つ１つ以上の光変調器プレートによって変
調されてカラー表示を生じる表示システムを得る。According to a preferred embodiment of the invention, a display system comprising a light source device having separate primary color channels of red, green and blue beams, one or more channels of these colors being provided by a set of LEDs. Obtaining a display system produced and modulated by one or more light modulator plates to produce a color display.

【００１５】 ＬＥＤの各組におけるピーク値波長は、互いに少なくとも１nmだけ、好ましく
は約20nmだけ異ならせる必要があり、この相違をどの位の値にするかは合成ビー
ムの所望のスペクトル特性によって決定される。The peak wavelengths in each set of LEDs should differ from each other by at least 1 nm, preferably about 20 nm, and the value of this difference is determined by the desired spectral characteristics of the combined beam. It

【００１６】 例えば、緑色チャネルを２つのＬＥＤビーム源の１組をもって構成することが
でき、これらＬＥＤビーム源の一方は、ピーク値波長が530±10nmの１つ以上の
ＬＥＤとし、他方は、ピーク値波長が550±10nmの１つ以上のＬＥＤとした。赤
色チャネルは、例えば、ピーク値波長が595±10nmのＬＥＤビーム源と、ピーク
値波長が615±10nmのＬＥＤビーム源とをもって構成することができ、一方、青
色チャネルを、例えば、ピーク値波長が450±10nmのＬＥＤビーム源と、ピーク
値波長が470±10nmのＬＥＤビーム源とをもって構成することができた。For example, the green channel can be constructed with a set of two LED beam sources, one of which is one or more LEDs with a peak value wavelength of 530 ± 10 nm and the other of which is a peak. One or more LEDs having a value wavelength of 550 ± 10 nm were used. The red channel can be configured, for example, with an LED beam source having a peak value wavelength of 595 ± 10 nm and an LED beam source having a peak value wavelength of 615 ± 10 nm, while the blue channel can be configured, for example, with a peak value wavelength of It was possible to construct an LED beam source having a wavelength of 450 ± 10 nm and an LED beam source having a peak value wavelength of 470 ± 10 nm.

【００１７】 好適な実施例の説明 ここで、図１を参照するに、２つのＬＥＤ光源11及び12を含むＬＥＤの組10と
、本発明による二色混合装置との一実施例を示してある。赤色ＬＥＤ光源11及び
12の各々は、反射器15及び16内にそれぞれ位置する１つのＬＥＤ13及び14を有し
、これらＬＥＤは、光源ビームをそれぞれ異なるピーク値波長、595及び615nmで
放出する。これら光源ビームの各々は、45度の入射角で、光学素子18内に支持さ
れているダイクロイックフィルタ19の両側に指向される。ダイクロイックフィル
タ19は、595nmのビームを透過し、615nmのビームを反射するように設計されてい
る。透過ビーム及び反射ビームは、共通光路に沿って、ルーメン出力は増大され
るがエテンデューは変化しない合成ビーム２として光学素子18から出射される。DESCRIPTION OF THE PREFERRED EMBODIMENT Referring now to FIG. 1, there is shown one embodiment of an LED set 10 including two LED light sources 11 and 12 and a dichroic mixing device according to the present invention. . Red LED light source 11 and
Each of the 12 has one LED 13 and 14 located within a reflector 15 and 16, respectively, which emits a source beam at different peak wavelengths, 595 and 615 nm, respectively. Each of these source beams is directed to both sides of a dichroic filter 19 supported within optical element 18 at an angle of incidence of 45 degrees. The dichroic filter 19 is designed to transmit a 595 nm beam and reflect a 615 nm beam. The transmitted beam and the reflected beam exit the optical element 18 along the common optical path as a combined beam 2 with increased lumen output but unchanged etendue.

【００１８】 図２に線図的に示すように、ＬＥＤ光源11及び12の各々は、個々のＬＥＤの群
又はアレイを有することもできる。ＬＥＤ光源20は個々のＬＥＤパッケージのア
レイ23を含む。各ＬＥＤパッケージは、基板24上に保持され、ドーム状素子26内
にカプセル封止され且つレンズ28内に取付けられたＬＥＤ22を含む。集光レンズ
30はアレイからの光を電気光学光変調器パネルのような目標32に指向させる。As shown diagrammatically in FIG. 2, each of the LED light sources 11 and 12 may also have a group or array of individual LEDs. LED light source 20 includes an array 23 of individual LED packages. Each LED package includes an LED 22 carried on a substrate 24, encapsulated in a dome-like element 26 and mounted in a lens 28. Condenser lens
30 directs light from the array to a target 32, such as an electro-optic light modulator panel.

【００１９】 合成ビームは、スペクトルの広い標準の単一カラービームとして用いることが
でき、続いて、表示目的のために、他のカラービームと混合すなわち合成するこ
とができる。The combined beam can be used as a broad spectrum standard single color beam, which can then be mixed or combined with other color beams for display purposes.

【００２０】 例えば、一定のエテンデューの赤色、青色及び緑色チャネルを合成して、白色
光を発生する場合、現状のＬＥＤ技術では、充分なルーメン出力の緑色ＬＥＤを
製造することができないので、より厳密にバランスのとれた赤色及び青色ＬＥＤ
の全ルーメン出力を、所望のカラーバランスを崩さずに用いることができない。
互いに異なるもわずかしか相違しないピーク値波長、例えば530nm及び550nmの２
つの緑色ＬＥＤ光源を組み合わせることによって、緑色ビームのルーメン出力は
ほぼ２倍になり、赤色及び青色ビームをもより高いルーメン出力で駆動すること
ができ、その結果、合成白色光出力をほぼ２倍にする。For example, when red, blue, and green channels with a certain etendue are combined to generate white light, the current LED technology cannot manufacture a green LED with a sufficient lumen output, so that it is more strict. Well-balanced red and blue LEDs
Cannot be used without disturbing the desired color balance.
Peak wavelengths that differ from each other but only slightly, eg 2 at 530 nm and 550 nm
By combining two green LED light sources, the lumen output of the green beam is almost doubled, and the red and blue beams can be driven with higher lumen output, resulting in almost double the combined white light output. To do.

【００２１】 図３には、このような光源装置を線図的に示しており、緑色ＬＥＤ光源Ｌ１及
びＬ２は、ピーク値波長がそれぞれ530±10nm及び550±10nmである緑色ビームＧ
１及びＧ２を有し、これら緑色ビームはダイクロイックミラーＭ１によって単一
ビームに合成される。次に、この合成緑色ビームが、ダイクロイックミラーＭ２
によってＬＥＤ光源Ｌ３からの赤色ビームＲと合成される。次に、この合成され
た赤色及び緑色ビームは、ダイクロイックミラーＭ３によってＬＥＤ光源Ｌ４か
らの青色ビームＢと合成されて白色光出力ビームＷを発生する。FIG. 3 schematically shows such a light source device, and the green LED light sources L1 and L2 have a green beam G having peak value wavelengths of 530 ± 10 nm and 550 ± 10 nm, respectively.
1 and G2, these green beams are combined into a single beam by the dichroic mirror M1. Next, this composite green beam is used for dichroic mirror M2
Is combined with the red beam R from the LED light source L3. Next, the combined red and green beams are combined with the blue beam B from the LED light source L4 by the dichroic mirror M3 to generate a white light output beam W.

【００２２】 本発明の代表的な３パネルのカラープロジェクション表示システムを図４に線
図的に示す。ＬＥＤ光源Ｌ１及びＬ２のそれぞれからの緑色ビームＧ１及びＧ２
はダイクロイックミラーＭ１によって単一ビームに合成される。同様に、ＬＥＤ
光源Ｌ３及びＬ４からの赤色ビームＲ１及びＲ２がダイクロイック性ミラーＭ２
によって合成される。次に、これら緑色及び赤色ビームは、ダイクロイックミラ
ーＭ３によって共通光軸に沿って光変調器パネルＰに指向され、そこからプロジ
ェクションレンズＰＬに指向される。ＬＥＤ光源Ｌ５及びＬ６からの青色ビーム
Ｂ１及びＢ２はダイクロイックミラーＭ４によって合成され、次に、ダイクロイ
ックミラーＭ５によって赤色及び緑色ビームの共通光線に沿って指向される。赤
色、緑色及び青色ビームは、別々の表示信号に応じ光変調器パネルＰによって別
々に変調される。例えば、カラービデオ信号を再生する既知のフレーム順次駆動
方式では、光変調器パネルＰは、ビデオフレームレート、例えば60Hzにおけるビ
デオ信号の別々の原色成分でアドレスされ、アドレスされた原色成分の色に対応
する色で光変調器パネルＰを照明するように、ＬＥＤ光源Ｌ１〜Ｌ６はパルスに
より同期的にオン及びオフされる。パネルＰは液晶表示装置であるのが好ましい
。A representative three panel color projection display system of the present invention is shown diagrammatically in FIG. Green beams G1 and G2 from the LED light sources L1 and L2, respectively
Are combined into a single beam by the dichroic mirror M1. Similarly, LED
The red beams R1 and R2 from the light sources L3 and L4 are reflected by the dichroic mirror M2.
Is synthesized by. The green and red beams are then directed by the dichroic mirror M3 along the common optical axis to the light modulator panel P and from there to the projection lens PL. The blue beams B1 and B2 from the LED light sources L5 and L6 are combined by a dichroic mirror M4 and then directed by the dichroic mirror M5 along the common ray of the red and green beams. The red, green and blue beams are separately modulated by the light modulator panel P according to different display signals. For example, in the known frame-sequential driving scheme for reproducing a color video signal, the light modulator panel P is addressed with different primary color components of the video signal at a video frame rate, eg 60 Hz, corresponding to the colors of the addressed primary color components. The LED light sources L1 to L6 are pulsed on and off synchronously so as to illuminate the light modulator panel P with different colors. The panel P is preferably a liquid crystal display device.

【００２３】 ダイクロイックミラーの実際の順序は、図示の順序である必要はない。本発明
によれば、ビームを、フィルタ及び光路の良好な設計基準と合致するいかなる順
序でも混合することができる。The actual order of the dichroic mirrors need not be the order shown. The invention allows the beams to be mixed in any order consistent with good design criteria for filters and optical paths.

【００２４】 本発明を少数の実施例に関して説明した。他の実施例、変形例及び従来技術で
認識される等価な構成例は当業者にとって明らかであり、これらは、請求の範囲
に述べた本発明の範囲内に含まれるものである。The invention has been described with reference to a few examples. Other embodiments, variations and equivalent arrangements recognized in the prior art will be apparent to those skilled in the art and are intended to be included within the scope of this invention as claimed.

【図面の簡単な説明】[Brief description of drawings]

【図１】 ２つの赤色ＬＥＤ光源ビームを単一の赤色ビームに二色混合する本発
明のＬＥＤの組を示す線図である。FIG. 1 is a diagram illustrating a set of LEDs of the present invention that dichroically mixes two red LED source beams into a single red beam.

【図２】 個々のＬＥＤの群を有するＬＥＤ光源の線図である。FIG. 2 is a diagram of an LED light source with a group of individual LEDs.

【図３】 緑色ＬＥＤの組を含む本発明の光源の線図である。FIG. 3 is a diagram of a light source of the present invention including a set of green LEDs.

【図４】 本発明の光源を具えたカラープロジェクション表示システムの線図で
ある。FIG. 4 is a diagram of a color projection display system including a light source of the present invention.

───────────────────────────────────────────────────── フロントページの続き (72)発明者 ミハエル デー パシュリー オランダ国 5656 アーアー アインドー フェン プロフ ホルストラーン ６ (72)発明者 スティーヴン ハーマン オランダ国 5656 アーアー アインドー フェン プロフ ホルストラーン ６ Ｆターム(参考） 2H091 FA05Z FA45Z KA10 LA15 LA30 MA07 5F041 AA04 AA11 DA82 DB08 EE22 FF01 ─────────────────────────────────────────────────── ─── Continued front page    (72) Inventor Michael De Pashley             Netherlands 5656 aer ind             Fenprof Holstraan 6 (72) Inventor Stephen Harman             Netherlands 5656 aer ind             Fenprof Holstraan 6 F-term (reference) 2H091 FA05Z FA45Z KA10 LA15                       LA30 MA07                 5F041 AA04 AA11 DA82 DB08 EE22                       FF01

Claims (10)

【特許請求の範囲】[Claims] 【請求項１】 光源装置と、この光源からの光を表示信号に応じて制御する少な
くとも１つの制御手段（39）とを具える表示システムであって、前記光源装置が
発光ダイオード光源の少なくとも１つの組（10）を有し、この発光ダイオードの
組（10）が少なくとも２つの発光ダイオード光源（11，12）を有し、これら発光
ダイオード光源の一方（11，12）が、発光ダイオード光源の他方（12，11）の出
力ビームのピーク値波長と異なるもわずかしか相違していないピーク値波長を有
する出力ビームを生じ、前記光源装置が更に、別々の出力ビームを１つのビーム
に合成する手段（18）をも有している当該表示システム。1. A display system comprising a light source device and at least one control means (39) for controlling light from the light source according to a display signal, wherein the light source device is at least one of light emitting diode light sources. Has a set (10), the set of light emitting diodes (10) has at least two light emitting diode light sources (11, 12), and one of the light emitting diode light sources (11, 12) is a light emitting diode light source. Means for producing an output beam having a peak value wavelength that is different but only slightly different from the peak value wavelength of the other (12,11) output beam, the light source device further combining the separate output beams into one beam. The display system also having (18). 【請求項２】 請求項１に記載の表示システムであって、前記発光ダイオードの
組（34）が、これと異なる色の１つ以上の発光ダイオード光源（36，38）又は発
光ダイオードの１つの以上の組（42，44）又はこれらの双方と組み合わされて、
色成分の波長に依存する合成光出力を生じるようになっている表示システム。2. A display system according to claim 1, wherein the set of light emitting diodes (34) comprises one or more light emitting diode light sources (36, 38) of different colors or one of the light emitting diodes. In combination with the above set (42,44) or both of these,
A display system adapted to produce a combined light output that depends on the wavelengths of the color components. 【請求項３】 請求項２に記載の表示システムであって、前記制御手段（39）が
、それぞれの色に対する入力電力をそれぞれ独立して制御して表示の色及び輝度
の双方又はいずれか一方を変化させる手段（48）を有している表示システム。3. The display system according to claim 2, wherein the control unit (39) independently controls input power for each color to display color and / or brightness of the display. A display system having means (48) for changing the. 【請求項４】 請求項２に記載の表示システムであって、前記発光ダイオードの
組（34）が緑色発光ダイオードの組であり、赤色発光ダイオード光源（36）及び
青色発光ダイオード光源（38）と組み合わされて表示を行なうようになっている
表示システム。4. The display system according to claim 2, wherein the set of light emitting diodes (34) is a set of green light emitting diodes, and a red light emitting diode light source (36) and a blue light emitting diode light source (38) are provided. A display system that is designed to display in combination. 【請求項５】 請求項２に記載の表示システムであって、前記発光ダイオードの
組（40）が緑色発光ダイオードの組であり、赤色発光ダイオードの組（42）及び
青色発光ダイオードの組（44）と組み合わされている表示システム。5. The display system according to claim 2, wherein the set of light emitting diodes (40) is a set of green light emitting diodes, and the set of red light emitting diodes (42) and the set of blue light emitting diodes (44). Display system combined with. 【請求項６】 請求項１に記載の表示システムであって、前記発光ダイオードの
組内の発光ダイオード光源がダイクロイックフィルタ手段（Ｍ１，Ｍ２，Ｍ３）
によって合成されている表示システム。6. The display system according to claim 1, wherein the light emitting diode light sources in the set of light emitting diodes are dichroic filter means (M1, M2, M3).
The display system being synthesized by. 【請求項７】 請求項１に記載の表示システムであって、前記制御手段（39）が
少なくとも１つの光変調器パネル（Ｐ）を有している表示システム。7. A display system according to claim 1, wherein the control means (39) comprises at least one light modulator panel (P). 【請求項８】 請求項７に記載の表示システムであって、前記光変調器パネル（
Ｐ）が液晶表示装置を有している表示システム。8. The display system according to claim 7, wherein the light modulator panel (
P) is a display system having a liquid crystal display device. 【請求項９】 請求項７に記載の表示システムであって、前記光源装置が、赤色
、緑色及び青色ビームのそれぞれの原色チャネルを形成する３つの別々の発光ダ
イオードの組（40，42，44）を有し、これらチャネルの各々が１つ以上の光変調
器パネル（Ｐ）によって変調されてカラー表示を生じるようになっている表示シ
ステム。9. A display system according to claim 7, wherein the light source device comprises three separate sets of light emitting diodes (40, 42, 44) forming respective primary color channels of red, green and blue beams. ), Each of these channels being modulated by one or more light modulator panels (P) to produce a color display. 【請求項１０】 請求項９に記載の表示システムであって、各発光ダイオードの
組（40，42，44）が２つの発光ダイオード光源（Ｌ１，Ｌ２；Ｌ３，Ｌ４；Ｌ５
，Ｌ６）から成り、緑色チャネルの発光ダイオード光源（Ｌ１，Ｌ２）が約530
±10nm及び550±10nmのピーク値波長をそれぞれ有し、赤色チャネルの発光ダイ
オード光源（Ｌ３，Ｌ４）が約595±10nm及び615±10nmのピーク値波長をそれぞ
れ有し、青色チャネルの発光ダイオード光源（Ｌ５，Ｌ６）が約450±10nm及び4
70±10nmのピーク値波長をそれぞれ有する表示システム。10. The display system according to claim 9, wherein each light emitting diode set (40, 42, 44) comprises two light emitting diode light sources (L1, L2; L3, L4; L5).
, L6), and the green channel LED light source (L1, L2) is about 530
The red channel light emitting diode light sources (L3, L4) have peak value wavelengths of ± 10 nm and 550 ± 10 nm, respectively, and the red channel light emitting diode light source (L3, L4) have peak wavelengths of about 595 ± 10 nm and 615 ± 10 nm, respectively, and a blue channel light emitting diode light source (L5, L6) is about 450 ± 10nm and 4
A display system having a peak value wavelength of 70 ± 10 nm.
JP2001543717A 1999-12-09 2000-11-23 Display system with light emitting diode light source Abandoned JP2003516558A (en)

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US45669099A 1999-12-09 1999-12-09
US09/456,690 1999-12-09
PCT/EP2000/011651 WO2001043113A1 (en) 1999-12-09 2000-11-23 Display systems incorporating light-emitting diode light source

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WO2001043113A1 (en) 2001-06-14
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KR100817786B1 (en) 2008-03-31

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