JPH07106071A - Discharge lamp lighting device, discharge lamp lighting method, and image display device using the lighting device - Google Patents
Discharge lamp lighting device, discharge lamp lighting method, and image display device using the lighting deviceInfo
- Publication number
- JPH07106071A JPH07106071A JP24403793A JP24403793A JPH07106071A JP H07106071 A JPH07106071 A JP H07106071A JP 24403793 A JP24403793 A JP 24403793A JP 24403793 A JP24403793 A JP 24403793A JP H07106071 A JPH07106071 A JP H07106071A
- Authority
- JP
- Japan
- Prior art keywords
- discharge lamp
- lamp
- circuit
- lighting
- voltage
- 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.)
- Pending
Links
- 238000000034 method Methods 0.000 title claims description 7
- 239000003990 capacitor Substances 0.000 claims abstract description 40
- 238000001514 detection method Methods 0.000 claims abstract description 13
- 230000015556 catabolic process Effects 0.000 claims abstract description 10
- 238000010891 electric arc Methods 0.000 claims description 6
- 230000003287 optical effect Effects 0.000 claims description 6
- 229910052692 Dysprosium Inorganic materials 0.000 claims description 3
- 230000005540 biological transmission Effects 0.000 claims description 3
- -1 dysprosium halide Chemical class 0.000 claims description 3
- 239000007858 starting material Substances 0.000 claims 3
- 238000009499 grossing Methods 0.000 description 9
- 238000010586 diagram Methods 0.000 description 4
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 2
- LYQFWZFBNBDLEO-UHFFFAOYSA-M caesium bromide Chemical compound [Br-].[Cs+] LYQFWZFBNBDLEO-UHFFFAOYSA-M 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- KLRHPHDUDFIRKB-UHFFFAOYSA-M indium(i) bromide Chemical compound [Br-].[In+] KLRHPHDUDFIRKB-UHFFFAOYSA-M 0.000 description 2
- 239000004973 liquid crystal related substance Substances 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 229910001507 metal halide Inorganic materials 0.000 description 2
- 150000005309 metal halides Chemical class 0.000 description 2
- 230000000630 rising effect Effects 0.000 description 2
- 238000004804 winding Methods 0.000 description 2
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 description 1
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
- 229910001508 alkali metal halide Inorganic materials 0.000 description 1
- 150000008045 alkali metal halides Chemical class 0.000 description 1
- 229910052786 argon Inorganic materials 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 230000002596 correlated effect Effects 0.000 description 1
- KXCRAPCRWWGWIW-UHFFFAOYSA-K holmium(3+);triiodide Chemical compound I[Ho](I)I KXCRAPCRWWGWIW-UHFFFAOYSA-K 0.000 description 1
- WABPQHHGFIMREM-UHFFFAOYSA-N lead(0) Chemical compound [Pb] WABPQHHGFIMREM-UHFFFAOYSA-N 0.000 description 1
- 229910052744 lithium Inorganic materials 0.000 description 1
- QSHDDOUJBYECFT-UHFFFAOYSA-N mercury Chemical compound [Hg] QSHDDOUJBYECFT-UHFFFAOYSA-N 0.000 description 1
- 229910052753 mercury Inorganic materials 0.000 description 1
- FWIYBTVHGYLSAZ-UHFFFAOYSA-I pentaiodoniobium Chemical compound I[Nb](I)(I)(I)I FWIYBTVHGYLSAZ-UHFFFAOYSA-I 0.000 description 1
- 229910052708 sodium Inorganic materials 0.000 description 1
- 239000011734 sodium Substances 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
- LZOMHYVAEHYDST-UHFFFAOYSA-K thulium(3+);triiodide Chemical compound I[Tm](I)I LZOMHYVAEHYDST-UHFFFAOYSA-K 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
Landscapes
- Circuit Arrangements For Discharge Lamps (AREA)
Abstract
(57)【要約】
【目的】 連続点灯状態にあったランプを消灯後に直ち
に始動させる場合でも良好にランプを点灯できるように
する。
【構成】 直流電源を電力制御して高圧放電灯１１に点
灯電力を供給する点灯回路（２，３）と、この点灯回路
の出力側に並列に設けられるコンデンサ７と、ランプ始
動時に点灯回路のチョッパ動作を停止しこのコンデンサ
７に高圧放電灯のグロー電位よりも高い電圧をチャージ
する高電圧発生回路８と、ランプ始動時に高圧放電灯内
を絶縁破壊しグロー放電状態にするための高電圧パルス
をコンデンサ７の両端電圧に重畳して高圧放電灯１１に
繰り返し印加する始動回路（９，１０）と、高圧放電灯
１１のランプ状態を検出し、高圧放電灯が点灯状態に移
行したあとに高電圧発生回路８と始動回路（９，１０）
の動作を停止させるランプ状態検出回路４とを備える。
(57) [Summary] [Purpose] To enable good lighting of a lamp that was in a continuous lighting state even if it is started immediately after being turned off. [Structure] A lighting circuit (2, 3) for controlling the power of a DC power source to supply lighting power to a high-pressure discharge lamp 11, a capacitor 7 provided in parallel on the output side of the lighting circuit, and a lighting circuit for starting the lamp. A high-voltage generating circuit 8 for stopping the chopper operation and charging the capacitor 7 with a voltage higher than the glow potential of the high-pressure discharge lamp, and a high-voltage pulse for dielectric breakdown in the high-pressure discharge lamp at the start of the lamp to bring it into a glow discharge state. Is superimposed on the voltage across the capacitor 7 and is repeatedly applied to the high-pressure discharge lamp 11, and the lamp state of the high-pressure discharge lamp 11 is detected. Voltage generation circuit 8 and starting circuit (9, 10)
And a lamp state detection circuit 4 for stopping the operation.
Description
【０００１】[0001]
【産業上の利用分野】本発明は、ＨＩＤとして知られる
ショートアーク放電灯などの高圧放電灯（高輝度放電
灯）を点灯させるための放電灯点灯装置、放電灯点灯方
法およびこの点灯装置を用いた画像表示装置に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention uses a discharge lamp lighting device, a discharge lamp lighting method and a lighting device for lighting a high pressure discharge lamp (high intensity discharge lamp) such as a short arc discharge lamp known as HID. The present invention relates to an image display device.
【０００２】[0002]
【従来の技術】従来この種の放電灯点灯装置は、電源回
路から供給される直流電源をチョッパ回路でＰＷＭ制御
して電力を制御し、このチョッパ回路の出力を平滑回路
を介して高圧放電灯（以下、ランプという）に供給する
とともに、電源回路からの直流電源を始動回路をなす高
圧発生回路で高電圧パルスに変えてランプに印加するよ
うになっている。この放電灯点灯装置では、始動回路か
ら高電圧パルスが始動時にランプに加えられることで、
ランプがグロー放電状態となり、その後は平滑回路から
供給される電力によりアーク放電状態に移行し、点灯状
態となる。点灯状態に移行したあとは、チョッパ回路に
より点灯電力が制御される。2. Description of the Related Art Conventionally, a discharge lamp lighting device of this type controls the electric power by PWM control of a DC power supply supplied from a power supply circuit by a chopper circuit, and the output of the chopper circuit is supplied through a smoothing circuit to a high pressure discharge lamp. (Hereinafter referred to as "lamp"), the direct current power from the power supply circuit is converted into a high voltage pulse by a high voltage generating circuit which constitutes a starting circuit and applied to the lamp. In this discharge lamp lighting device, a high voltage pulse is applied to the lamp at the time of starting from the starting circuit,
The lamp is in the glow discharge state, and thereafter, the electric power supplied from the smoothing circuit shifts to the arc discharge state and becomes the lighting state. After shifting to the lighting state, the chopper circuit controls the lighting power.
【０００３】[0003]
【発明が解決しようとする課題】ところで、この種の放
電灯点灯装置では、連続点灯状態にあったランプを消灯
後の短時間に再び点灯させようとすると、ランプが立ち
切れとなり、点灯できない。これは、ランプの温度が高
くランプ内のガス圧が高くて、グロー電位が通常の（ラ
ンプが冷えているときの）２倍以上と高く、平滑回路か
ら供給される電源電圧を上回ってしまうために始動回路
から印加される高電圧パルスを重畳してもランプがグロ
ー放電からアーク放電に移行しないことによるものであ
る。By the way, in this type of discharge lamp lighting device, if an attempt is made to turn on a lamp that has been in a continuous lighting state for a short time after being turned off, the lamp will be cut off and cannot be turned on. This is because the temperature of the lamp is high and the gas pressure in the lamp is high, the glow potential is twice as high as the normal (when the lamp is cold), and exceeds the power supply voltage supplied from the smoothing circuit. This is because the lamp does not shift from glow discharge to arc discharge even when a high voltage pulse applied from the starting circuit is superposed on.
【０００４】本発明は、このような従来の技術が有する
課題を解決するために提案されたものであり、連続点灯
状態にあったランプを消灯後に直ちに始動させる場合で
も良好にランプを点灯状態とすることができる放電灯点
灯装置、放電灯点灯方法およびこの点灯装置を用いた画
像表示装置を提供することを目的とする。The present invention has been proposed in order to solve the problems of the prior arts described above. Even when a lamp that has been in a continuous lighting state is started immediately after being turned off, the lamp is kept in a good lighting state. An object of the present invention is to provide a discharge lamp lighting device, a discharge lamp lighting method and an image display device using the lighting device.
【０００５】[0005]
【課題を解決するための手段】この目的を達成するため
に本発明による放電灯点灯装置は、直流電源を電力制御
して高圧放電灯に点灯電力を供給する点灯回路と、この
点灯回路の出力側に並列に設けられるコンデンサと、ラ
ンプ始動時にこのコンデンサに高圧放電灯のグロー電位
よりも高い電圧をチャージする高電圧発生回路と、ラン
プ始動時に高圧放電灯内を絶縁破壊しグロー放電状態に
するための高電圧パルスを上記コンデンサの両端電圧に
重畳して高圧放電灯に繰り返し印加する始動回路と、高
圧放電灯のランプ点灯状態を検出し、高圧放電灯が点灯
状態に移行したあとに上記高電圧発生回路と上記始動回
路の動作を停止させるランプ状態検出回路とを備える構
成としてある。In order to achieve this object, a discharge lamp lighting device according to the present invention comprises a lighting circuit for controlling the power of a DC power supply to supply lighting power to a high pressure discharge lamp, and an output of the lighting circuit. Side parallel capacitor, a high voltage generation circuit that charges this capacitor with a voltage higher than the glow potential of the high-pressure discharge lamp when starting the lamp, and a high-voltage discharge lamp dielectric breakdown at the time of lamp starting A high-voltage pulse for superimposing a high-voltage pulse on the voltage across the capacitor and repeatedly applying it to the high-pressure discharge lamp, and detecting the lamp lighting state of the high-pressure discharge lamp, and then switching the high-voltage discharge lamp to the high-voltage discharge lamp. The configuration includes a voltage generation circuit and a lamp state detection circuit that stops the operation of the starting circuit.
【０００６】また、本発明による放電灯点灯装置は、直
流電源を電力制御して出力する点灯回路と、この点灯回
路の出力を交流に変換する極性切替え回路と、この極性
切替え回路からの点灯用の交流出力が供給される高圧放
電灯と、上記点灯回路の出力側に並列に設けられるコン
デンサと、ランプ始動時にこのコンデンサに高圧放電灯
のグロー電位よりも高い電圧をチャージする高電圧発生
回路と、ランプ始動時に高圧放電灯内を絶縁破壊しグロ
ー放電状態にするための高電圧パルスを上記コンデンサ
の両端電圧に重畳して高圧放電灯に繰り返し印加する始
動回路と、高圧放電灯のランプ点灯状態を検出し、高圧
放電灯が点灯状態に移行したあとに上記高電圧発生回路
と上記始動回路の動作を停止させるランプ状態検出回路
とを備える構成としてある。Further, the discharge lamp lighting device according to the present invention includes a lighting circuit for power-controlling and outputting a DC power source, a polarity switching circuit for converting the output of the lighting circuit into AC, and a lighting circuit for lighting from the polarity switching circuit. A high-voltage discharge lamp to which an AC output of the high-voltage discharge lamp is supplied, a capacitor provided in parallel on the output side of the lighting circuit, and a high-voltage generation circuit that charges the capacitor with a voltage higher than the glow potential of the high-voltage discharge lamp when the lamp is started. The starting circuit that superimposes a high-voltage pulse on the voltage across the capacitor to repeatedly apply to the high-pressure discharge lamp to insulate the interior of the high-pressure discharge lamp by dielectric breakdown when the lamp is started, and the lighting state of the high-pressure discharge lamp. And a lamp state detection circuit that stops the operation of the high voltage generation circuit and the starting circuit after the high-pressure discharge lamp has transitioned to a lighting state, And Aru.
【０００７】また、本発明による放電灯点灯方法は、電
力制御された点灯電力を点灯回路から出力して高圧放電
灯に供給するとともに、ランプ始動時には、グロー電位
よりも高い高電圧をコンデンサにチャージし、高圧放電
灯内を絶縁破壊しグロー放電状態にするための高電圧パ
ルスをこのコンデンサの両端電圧に重畳して高圧放電灯
に繰り返し印加して放電灯を点灯状態とさせる方法とし
てある。In the discharge lamp lighting method according to the present invention, the power controlled lighting power is output from the lighting circuit and supplied to the high pressure discharge lamp, and at the time of starting the lamp, a high voltage higher than the glow potential is charged in the capacitor. Then, a high voltage pulse for causing dielectric breakdown in the high pressure discharge lamp to bring it into a glow discharge state is superimposed on the voltage across the capacitor and repeatedly applied to the high pressure discharge lamp to turn on the discharge lamp.
【０００８】また、本発明による画像表示装置は、上記
放電灯点灯装置によって点灯される高圧放電灯からの投
射光が投光される画像形成部と、この画像形成部を透過
した透過画像を外部スクリーンに投影する光学手段とを
備える構成としてある。Further, the image display device according to the present invention is configured such that an image forming portion onto which projection light from a high pressure discharge lamp, which is lit by the discharge lamp lighting device, is projected, and a transmission image transmitted through the image forming portion are externally provided. An optical means for projecting on a screen is provided.
【０００９】[0009]
【作用】上述した構成によれば、ランプ始動時にグロー
電位以上の高電圧をコンデンサにチャージして、このコ
ンデンサの電位に始動回路からの高電圧パルスを重畳し
てランプを点灯させるようにしているので、連続点灯し
ていた高圧放電灯を消灯後に直ちに点灯させる場合のよ
うに、放電灯の温度が高くグロー電位が上昇している場
合でも高圧放電灯を良好に点灯できる。According to the above-mentioned structure, the capacitor is charged with a high voltage equal to or higher than the glow potential at the time of starting the lamp, and the high voltage pulse from the starting circuit is superimposed on the potential of the capacitor to light the lamp. Therefore, the high-pressure discharge lamp can be satisfactorily lit even when the temperature of the discharge lamp is high and the glow potential is rising, as in the case of immediately lighting the high-pressure discharge lamp that has been continuously lit.
【００１０】[0010]
【実施例】以下、本発明の実施例を図面に基づき詳細に
説明する。図１のブロック図に、本発明による放電灯点
灯装置の一実施例を示す。この図で、電源回路１で作ら
れた直流電源は、チョッパ回路２でＰＷＭ（パルス幅変
調）制御されることで、電力制御され、その後平滑回路
３に送られる。ここで、チョッパ回路２と平滑回路３
は、電力制御用の点灯回路を構成している。端子２ａ
は、チョッパ回路２に接続される調光信号入力端子であ
る。平滑回路３の出力端子には、ランプ電圧検出回路４
を介してコンデンサ７が接続されている。このコンデン
サ７には、高圧パルス発生用のトランス１０の二次巻線
１０ｂと高圧放電灯１１（以下、ランプ１１という）の
直列回路が並列に接続されている。また、電源回路１は
始動回路をなす高電圧パルス発生回路９に接続され、こ
の高電圧パルス発生回路９の出力端子にトランス１０の
一次巻線１０ａが接続されている。また、電源回路１は
高圧発生回路８に接続され、この高圧発生回路８の出力
端子がコンデンサ７に接続されている。ランプ電圧検出
回路４からの検出信号が供給される制御回路５により、
チョッパ回路２が制御される。Embodiments of the present invention will now be described in detail with reference to the drawings. FIG. 1 is a block diagram showing an embodiment of a discharge lamp lighting device according to the present invention. In this figure, the DC power supply generated by the power supply circuit 1 is power-controlled by being PWM (pulse width modulation) controlled by the chopper circuit 2, and then sent to the smoothing circuit 3. Here, the chopper circuit 2 and the smoothing circuit 3
Constitute a lighting circuit for power control. Terminal 2a
Is a dimming signal input terminal connected to the chopper circuit 2. The output terminal of the smoothing circuit 3 is connected to the lamp voltage detection circuit 4
The capacitor 7 is connected via. A series circuit of a secondary winding 10b of a transformer 10 for generating a high voltage pulse and a high pressure discharge lamp 11 (hereinafter referred to as a lamp 11) is connected in parallel to the capacitor 7. Further, the power supply circuit 1 is connected to a high voltage pulse generating circuit 9 which constitutes a starting circuit, and the output terminal of the high voltage pulse generating circuit 9 is connected to the primary winding 10a of the transformer 10. Further, the power supply circuit 1 is connected to the high voltage generation circuit 8, and the output terminal of this high voltage generation circuit 8 is connected to the capacitor 7. By the control circuit 5 to which the detection signal from the lamp voltage detection circuit 4 is supplied,
The chopper circuit 2 is controlled.
【００１１】このように構成される放電灯点灯装置で
は、ランプ１１を点灯するとき、まずチョッパ回路２を
オフとするとともに、高圧発生回路８を動作させて、コ
ンデンサ７に例えば５００Ｖ程度の高電圧をチャージす
る。その後、高圧パルス発生回路９を動作させて、高電
圧パルス発生回路９とトランス１０によって作られた２
０ＫＶ程度の高電圧パルスを繰り返しランプ１１に印加
する。これにより、温度が高くグロー電位が上昇してい
るランプ１１は、コンデンサ７から供給される高電圧と
始動回路から印加される高電圧パルスとにより、グロー
放電状態から直ちにアーク放電状態に転移して点灯状態
となる。ランプが点灯したことがランプ状態検出回路４
で検出されると、チョッパ回路２が動作を開始するとと
もに、高電圧発生回路８と高電圧パルス発生回路９の動
作が停止する。In the discharge lamp lighting device configured as described above, when the lamp 11 is lit, the chopper circuit 2 is turned off and the high voltage generation circuit 8 is operated to cause the capacitor 7 to have a high voltage of, for example, about 500V. To charge. After that, the high voltage pulse generating circuit 9 is operated, and the high voltage pulse generating circuit 9 and the transformer 10 are used.
A high voltage pulse of about 0 KV is repeatedly applied to the lamp 11. As a result, the lamp 11, which has a high temperature and a high glow potential, immediately transitions from the glow discharge state to the arc discharge state due to the high voltage supplied from the capacitor 7 and the high voltage pulse applied from the starting circuit. It lights up. Lamp status detection circuit 4 when the lamp is turned on
When detected by, the chopper circuit 2 starts to operate, and the operations of the high voltage generation circuit 8 and the high voltage pulse generation circuit 9 are stopped.
【００１２】このように、この放電灯点灯装置では、ラ
ンプ始動時に、グロー電位よりも高い高電圧をコンデン
サ７にチャージし、ランプ１１内を絶縁破壊しグロー放
電状態にするための高電圧パルスをこのコンデンサ７の
両端電圧に重畳してランプ１１に繰り返し印加してラン
プ１１を点灯状態とさせる点灯方法を採用しているの
で、ランプ温度が高い場合でもランプ１１を良好に再始
動できる。As described above, in this discharge lamp lighting device, when the lamp is started, a high voltage higher than the glow potential is charged in the capacitor 7 and a high voltage pulse for causing a dielectric breakdown in the lamp 11 to be in a glow discharge state is generated. Since a lighting method is adopted in which the lamp 11 is turned on by being repeatedly applied to the lamp 11 by being superimposed on the voltage across the capacitor 7, the lamp 11 can be restarted well even when the lamp temperature is high.
【００１３】つぎに、図２に示す他の実施例の放電灯点
灯装置を説明する。この実施例では、コンデンサ７の後
段に極性切替え回路１２を設け、ランプ１１を交流点灯
できるようにしたものである。他の動作は、図１の放電
灯点灯装置と同様である。Next, a discharge lamp lighting device of another embodiment shown in FIG. 2 will be described. In this embodiment, a polarity switching circuit 12 is provided after the capacitor 7 so that the lamp 11 can be AC-lit. Other operations are similar to those of the discharge lamp lighting device of FIG.
【００１４】なお、図１および図２の放電灯点灯装置に
おいて、コンデンサ７を設けずに、平滑回路３を構成す
る平滑用コンデンサに、ランプ始動時に高電圧発生回路
８からグロー電位よりも高い高電圧をチャージするよう
な構成も可能である。In the discharge lamp lighting device of FIGS. 1 and 2, the smoothing capacitor constituting the smoothing circuit 3 is provided without the capacitor 7, and the high voltage higher than the glow potential is supplied from the high voltage generating circuit 8 when the lamp is started. A configuration in which a voltage is charged is also possible.
【００１５】つぎに、図１または図２の放電灯点灯装置
を用いて構成される画像表示装置の実施例を図３に基づ
き説明する。この実施例は、液晶ビデオ・プロジェクタ
に適用した例である。この図で、投射光源を構成する光
源装置１７のランプ１１は、上記放電灯点灯装置Ｕ１に
よって点灯される。この光源装置１７からの投射光は、
液晶表示素子からなる画像形成部１３を透過すること
で、透過画像を形成し、この透過画像が光学レンズなど
からなる光学手段１５によって外部のスクリーン１６上
に投影される。ここで、画像形成部１３にはビデオ再生
装置などからなる画像データ出力装置１４からＮＴＳＣ
方式の画像データ（ビデオ信号）が入力されている。Next, an embodiment of an image display device constructed by using the discharge lamp lighting device of FIG. 1 or 2 will be described with reference to FIG. This embodiment is an example applied to a liquid crystal video projector. In this figure, the lamp 11 of the light source device 17 constituting the projection light source is turned on by the discharge lamp lighting device U1. The projection light from the light source device 17 is
A transparent image is formed by transmitting through the image forming unit 13 including a liquid crystal display element, and the transparent image is projected on the external screen 16 by the optical unit 15 including an optical lens. Here, the image forming unit 13 is connected to the NTSC from the image data output device 14 including a video reproducing device.
Image data (video signal) of the method is input.
【００１６】つぎに、上記画像表示装置に用いられてい
る光源装置１７の構成を図４に基づき説明する。この光
源装置１７に装着されるランプ１１は、全長１５０ｍ
ｍ、消費電力１５０Ｗのメタハラショートアーク放電灯
からなる。このランプ１１の石英ガラス製の封体は、中
央部が略楕円球状の発光部１８となっており、その内部
には一対の電極１８ａ，１８ｂが対向配置されている。
発光部１８の両側からは、円筒状の電流導入部１９，１
９が延びており、それぞれがリード線に接続されてい
る。一方の電流導入部１９が反射鏡２０の孔２０ａに挿
通されてランプ１１の長手方向が反射鏡の軸線と一致し
ており、電流導入部１９の端部が取付け板２１に固定さ
れている。この取付け板２１は、位置調整ねじ２２によ
って基板２３に対して軸線方向移動可能に固着されてい
る。Next, the structure of the light source device 17 used in the image display device will be described with reference to FIG. The lamp 11 mounted on the light source device 17 has a total length of 150 m.
It consists of a meta-hara short arc discharge lamp with a power consumption of 150 W. The quartz glass envelope of the lamp 11 has a substantially elliptic spherical light emitting portion 18 at the center thereof, and a pair of electrodes 18a and 18b are disposed inside the light emitting portion 18 so as to face each other.
From both sides of the light emitting portion 18, cylindrical current introducing portions 19, 1
9 extend and are each connected to a lead wire. One current introducing portion 19 is inserted into the hole 20a of the reflecting mirror 20 so that the longitudinal direction of the lamp 11 coincides with the axis of the reflecting mirror, and the end portion of the current introducing portion 19 is fixed to the mounting plate 21. The mounting plate 21 is fixed to the substrate 23 by a position adjusting screw 22 so as to be movable in the axial direction.
【００１７】つぎに、ランプ１１の封入物について説明
する。ランプ１１の発光部１８内には、緩衝金属として
水銀が封入されているとともに、発光金属として金属ハ
ロゲン化物が封入されており、かつアルゴンなどの希ガ
スが封入されている。金属ハロゲン化物としては、ナト
リウムやリチウムに代表されるアルカリ金属のハロゲン
化物であってもよいが、ハロゲン化ジスプロシウムやよ
う化ホルミウムＨｏＩ3 、よう化ツリウムＴｍＩ3 、よ
う化ニオビウムＮｄＩ3 などを封入した場合には発光効
率が一層向上し、色温度が高くなり、相関色温度を５０
００Ｋ以上にすることができる。ここで、ハロゲン化ジ
スプロシウム、ＨｏＩ3 、ＴｍＩ3 、ＮｄＩ3 は総量で
約１ｍｇ／ｃｃ程度封入される。また、ＩｎＢｒ、Ｔｌ
Ｂｒ、ＳｎＢｒ、ＣｓＢｒなどが、色特性改善のために
封入される。Next, the enclosure of the lamp 11 will be described. In the light emitting portion 18 of the lamp 11, mercury is filled as a buffer metal, a metal halide is filled as a light emitting metal, and a rare gas such as argon is filled. The metal halide may be an alkali metal halide typified by sodium or lithium, but encapsulated with dysprosium halide, holmium iodide HoI 3 , thulium iodide TmI 3 , niobium iodide NdI 3 or the like. In this case, the luminous efficiency is further improved, the color temperature is increased, and the correlated color temperature is increased to 50.
It can be over 00K. Here, dysprosium halide, HoI 3 , TmI 3 , and NdI 3 are enclosed in a total amount of about 1 mg / cc. Also, InBr, Tl
Br, SnBr, CsBr, etc. are encapsulated for improving the color characteristics.
【００１８】[0018]
【発明の効果】以上説明したように本発明によれば、ラ
ンプ始動時にグロー電位以上の高電圧をコンデンサにチ
ャージして、このコンデンサの電位に始動回路からの高
電圧パルスを重畳してランプを点灯させるようにしてい
るので、連続点灯していたランプを消灯後に直ちに始動
させる場合のように、ランプ温度が高くグロー電位が上
昇している場合でもグローで立ち切れが生じることな
く、ランプを良好に再点灯することができるという利点
がある。As described above, according to the present invention, a high voltage equal to or higher than the glow potential is charged in the capacitor at the time of starting the lamp, and the high voltage pulse from the starting circuit is superposed on the potential of the capacitor to operate the lamp. Since it is lit, even if the lamp that was continuously lit is started immediately after being turned off, even if the lamp temperature is high and the glow potential is rising, the glow does not break off and the lamp is good. It has the advantage that it can be turned on again.
【図１】本発明による放電灯点灯装置の一実施例を示す
ブロック図である。FIG. 1 is a block diagram showing an embodiment of a discharge lamp lighting device according to the present invention.
【図２】他の実施例の放電灯点灯装置を示すブロック図
である。FIG. 2 is a block diagram showing a discharge lamp lighting device according to another embodiment.
【図３】画像表示装置のブロック図である。FIG. 3 is a block diagram of an image display device.
【図４】光源装置の一実施例を示す縦断面図である。FIG. 4 is a vertical sectional view showing an embodiment of a light source device.
１ 電源回路 ２ チョッパ回路 ３ 平滑回路 ４ ランプ状態検出
回路 ５ 制御回路 ７ コンデンサ ８ 高電圧発生回路 ９ 高電圧パルス発
生回路 １０ トランス １１ 高圧放電灯 １２ 極性切替え回路 １３ 画像形成部 １４ 画像データ出力装置 １５ 光学手段 １６ スクリーン １７ 光源装置 １８ 発光部 ２０ 反射鏡1 Power Supply Circuit 2 Chopper Circuit 3 Smoothing Circuit 4 Lamp State Detection Circuit 5 Control Circuit 7 Capacitor 8 High Voltage Generation Circuit 9 High Voltage Pulse Generation Circuit 10 Transformer 11 High Pressure Discharge Lamp 12 Polarity Switching Circuit 13 Image Forming Unit 14 Image Data Output Device 15 Optical means 16 Screen 17 Light source device 18 Light emitting unit 20 Reflecting mirror
───────────────────────────────────────────────────── フロントページの続き (72)発明者 及川 善貴 東京都港区新橋３丁目３番９号 東芝エ ー・ブイ・イー株式会社内 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Yoshitaka Oikawa 3-3-9 Shimbashi, Minato-ku, Tokyo Toshiba Abu E. Co., Ltd.
Claims (7)
灯電力を供給する点灯回路と、 この点灯回路の出力側に並列に設けられるコンデンサ
と、 ランプ始動時にこのコンデンサに高圧放電灯のグロー電
位よりも高い電圧をチャージする高電圧発生回路と、 ランプ始動時に高圧放電灯内を絶縁破壊しグロー放電状
態にするための高電圧パルスを上記コンデンサの両端電
圧に重畳して高圧放電灯に繰り返し印加する始動回路
と、 高圧放電灯のランプ点灯状態を検出し、高圧放電灯が点
灯状態に移行したあとに上記高電圧発生回路と上記始動
回路の動作を停止させるランプ状態検出回路とを備える
ことを特徴とする放電灯点灯装置。1. A lighting circuit for controlling the power of a DC power source to supply lighting power to a high-pressure discharge lamp, a capacitor provided in parallel on the output side of the lighting circuit, and a glow of the high-pressure discharge lamp in the capacitor when the lamp is started. A high-voltage generating circuit that charges a voltage higher than the potential, and a high-voltage pulse that insulates the inside of the high-pressure discharge lamp and causes a glow discharge state when the lamp is started, superimposes it on the voltage across the capacitor and repeats the high-voltage discharge lamp. A starting circuit to be applied, and a lamp state detection circuit that detects the lamp lighting state of the high pressure discharge lamp and stops the operation of the high voltage generation circuit and the starting circuit after the high pressure discharge lamp shifts to the lighting state. Discharge lamp lighting device characterized by.
路と、 この点灯回路からの点灯電力が供給される高圧放電灯
と、 上記点灯回路の出力側に並列に設けられるコンデンサ
と、 ランプ始動時にこのコンデンサに高圧放電灯のグロー電
位よりも高い電圧をチャージする高電圧発生回路と、 ランプ始動時に高圧放電灯内を絶縁破壊しグロー放電状
態にするための高電圧パルスを上記コンデンサの両端電
圧に重畳して高圧放電灯に繰り返し印加する始動回路
と、 高圧放電灯のランプ点灯状態を検出し、高圧放電灯が点
灯状態に移行したあとに上記高電圧発生回路と上記始動
回路の動作を停止させるランプ状態検出回路とを備える
ことを特徴とする放電灯点灯装置。2. A lighting circuit for power-controlling and outputting a DC power source, a high-pressure discharge lamp to which lighting power is supplied from the lighting circuit, a capacitor provided in parallel on the output side of the lighting circuit, and a lamp starter. A high voltage generator circuit that sometimes charges this capacitor with a voltage higher than the glow potential of the high-pressure discharge lamp, and a high-voltage pulse that causes a dielectric breakdown in the high-pressure discharge lamp to make it a glow discharge state when the lamp is started. The start circuit that is repeatedly applied to the high-pressure discharge lamp by superimposing on it, detects the lamp lighting state of the high-pressure discharge lamp, and stops the operation of the high-voltage generation circuit and the starting circuit after the high-voltage discharge lamp shifts to the lighting state. A discharge lamp lighting device, comprising: a lamp state detection circuit.
路と、 この点灯回路の出力を交流に変換する極性切替え回路
と、 この極性切替え回路からの点灯用の交流出力が供給され
る高圧放電灯と、 上記点灯回路の出力側に並列に設けられるコンデンサ
と、 ランプ始動時にこのコンデンサに高圧放電灯のグロー電
位よりも高い電圧をチャージする高電圧発生回路と、 ランプ始動時に高圧放電灯内を絶縁破壊しグロー放電状
態にするための高電圧パルスを上記コンデンサの両端電
圧に重畳して高圧放電灯に繰り返し印加する始動回路
と、 高圧放電灯のランプ点灯状態を検出し、高圧放電灯が点
灯状態に移行したあとに上記高電圧発生回路と上記始動
回路の動作を停止させるランプ状態検出回路とを備える
ことを特徴とする放電灯点灯装置。3. A lighting circuit for power-controlling and outputting a DC power supply, a polarity switching circuit for converting the output of the lighting circuit into AC, and a high-voltage discharge to which an AC output for lighting from the polarity switching circuit is supplied. An electric lamp, a capacitor provided in parallel on the output side of the above lighting circuit, a high voltage generation circuit that charges this capacitor with a voltage higher than the glow potential of the high-pressure discharge lamp when the lamp is started, and the inside of the high-pressure discharge lamp when the lamp is started. A starting circuit that repeatedly applies a high voltage pulse to the high-voltage discharge lamp by superposing a high-voltage pulse for dielectric breakdown to make it into a glow discharge state, and detects the lamp lighting state of the high-pressure discharge lamp, and turns on the high-voltage discharge lamp. A discharge lamp lighting device, comprising: a high-voltage generating circuit and a lamp state detection circuit that stops the operation of the starting circuit after shifting to a state.
出力して高圧放電灯に供給するとともに、 ランプ始動時には、グロー電位よりも高い高電圧をコン
デンサにチャージし、高圧放電灯内を絶縁破壊しグロー
放電状態にするための高電圧パルスをこのコンデンサの
両端電圧に重畳して高圧放電灯に繰り返し印加して放電
灯を点灯状態とさせることを特徴とする放電灯点灯方
法。4. The power-controlled lighting power is output from the lighting circuit and supplied to the high-pressure discharge lamp, and at the time of starting the lamp, a high voltage higher than the glow potential is charged in the capacitor to cause dielectric breakdown in the high-pressure discharge lamp. The discharge lamp lighting method is characterized in that a high voltage pulse for making a glow discharge state is superposed on the voltage across the capacitor and repeatedly applied to the high pressure discharge lamp to bring the discharge lamp into a lighting state.
路と、この点灯回路からの点灯電力が供給される高圧放
電灯と、上記点灯回路の出力側に並列に設けられるコン
デンサと、ランプ始動時にこのコンデンサに高圧放電灯
のグロー電位よりも高い電圧をチャージする高電圧発生
回路と、ランプ始動時に高圧放電灯内を絶縁破壊しグロ
ー放電状態にするための高電圧パルスを上記コンデンサ
の両端電圧に重畳して高圧放電灯に繰り返し印加する始
動回路と、高圧放電灯のランプ点灯状態を検出し、高圧
放電灯が点灯状態に移行したあとに上記高電圧発生回路
と上記始動回路の動作を停止させるランプ状態検出回路
とを有する放電灯点灯装置と、 この放電灯点灯装置によって点灯される上記高圧放電灯
からの投射光が投光される画像形成部と、 この画像形成部を透過した透過画像を外部スクリーンに
投影する光学手段とを備えることを特徴とする画像表示
装置。5. A lighting circuit for power-controlling and outputting a DC power source, a high-pressure discharge lamp to which lighting power is supplied from the lighting circuit, a capacitor provided in parallel on the output side of the lighting circuit, and a lamp starter. A high voltage generation circuit that sometimes charges this capacitor with a voltage higher than the glow potential of the high-pressure discharge lamp, and a high-voltage pulse that causes a dielectric breakdown in the high-pressure discharge lamp to make it into a glow discharge state when the lamp is started. The start circuit that is repeatedly applied to the high-pressure discharge lamp by superimposing on it and the lamp lighting state of the high-pressure discharge lamp is detected, and after the high-voltage discharge lamp shifts to the lighting state, the operation of the high voltage generation circuit and the starting circuit is stopped. A discharge lamp lighting device having a lamp state detection circuit, and an image forming unit on which projection light from the high pressure discharge lamp, which is lit by the discharge lamp lighting device, is projected. An image display device, characterized in that it comprises an optical means for projecting the transmission image transmitted through the image forming portion to the outside screen.
路と、この点灯回路の出力を交流に変換する極性切替え
回路と、この極性切替え回路からの点灯用の交流出力が
供給される高圧放電灯と、上記点灯回路の出力側に並列
に設けられるコンデンサと、ランプ始動時にこのコンデ
ンサに高圧放電灯のグロー電位よりも高い電圧をチャー
ジする高電圧発生回路と、ランプ始動時に高圧放電灯内
を絶縁破壊しグロー放電状態にするための高電圧パルス
を上記コンデンサの両端電圧に重畳して高圧放電灯に繰
り返し印加する始動回路と、高圧放電灯のランプ点灯状
態を検出し、高圧放電灯が点灯状態に移行したあとに上
記高電圧発生回路と上記始動回路の動作を停止させるラ
ンプ状態検出回路とを有する放電灯点灯装置と、 この放電灯点灯装置によって点灯される上記高圧放電灯
からの投射光が投光される画像形成部と、 この画像形成部を透過した透過画像を外部スクリーンに
投影する光学手段とを備えることを特徴とする画像表示
装置。6. A lighting circuit for power-controlling and outputting a DC power source, a polarity switching circuit for converting the output of the lighting circuit into an AC, and a high-voltage discharge to which an AC output for lighting from the polarity switching circuit is supplied. An electric lamp, a capacitor provided in parallel on the output side of the above lighting circuit, a high voltage generation circuit that charges this capacitor with a voltage higher than the glow potential of the high-pressure discharge lamp when the lamp is started, and the inside of the high-pressure discharge lamp when the lamp is started. A starter circuit that repeatedly applies a high voltage pulse to the high voltage discharge lamp by superposing a high voltage pulse for dielectric breakdown and glow discharge state on the voltage across the capacitor, and detects the lamp lighting state of the high pressure discharge lamp, and the high voltage discharge lamp lights up. A discharge lamp lighting device having a high voltage generation circuit and a lamp state detection circuit for stopping the operation of the starting circuit after shifting to a state, and the discharge lamp lighting device. An image display device, comprising: an image forming unit that emits projection light from the high-pressure discharge lamp that is turned on by a light; and an optical unit that projects a transmission image that has passed through the image forming unit onto an external screen. .
化ジスプロシウムを封入したショートアーク放電灯から
なることを特徴とする請求項５または請求項６記載の画
像表示装置。7. The image display device according to claim 5, wherein the high-pressure discharge lamp is a short arc discharge lamp containing at least dysprosium halide.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP24403793A JPH07106071A (en) | 1993-09-30 | 1993-09-30 | Discharge lamp lighting device, discharge lamp lighting method, and image display device using the lighting device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP24403793A JPH07106071A (en) | 1993-09-30 | 1993-09-30 | Discharge lamp lighting device, discharge lamp lighting method, and image display device using the lighting device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH07106071A true JPH07106071A (en) | 1995-04-21 |
Family
ID=17112779
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP24403793A Pending JPH07106071A (en) | 1993-09-30 | 1993-09-30 | Discharge lamp lighting device, discharge lamp lighting method, and image display device using the lighting device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH07106071A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1455382A2 (en) | 2003-03-03 | 2004-09-08 | Osram-Melco Toshiba Lighting Ltd. | High-intensity discharge lamp and lighting device therewith |
| JP2007149408A (en) * | 2005-11-25 | 2007-06-14 | Matsushita Electric Works Ltd | Discharge lamp lighting device and luminaire |
| EP2154936A2 (en) | 2008-08-15 | 2010-02-17 | Panasonic Electric Works Co., Ltd. | High pressure discharge lamp lighting device and luminaire |
-
1993
- 1993-09-30 JP JP24403793A patent/JPH07106071A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1455382A2 (en) | 2003-03-03 | 2004-09-08 | Osram-Melco Toshiba Lighting Ltd. | High-intensity discharge lamp and lighting device therewith |
| JP2007149408A (en) * | 2005-11-25 | 2007-06-14 | Matsushita Electric Works Ltd | Discharge lamp lighting device and luminaire |
| EP2154936A2 (en) | 2008-08-15 | 2010-02-17 | Panasonic Electric Works Co., Ltd. | High pressure discharge lamp lighting device and luminaire |
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