JPS5821726A - Electric power source device for projection - Google Patents
Electric power source device for projectionInfo
- Publication number
- JPS5821726A JPS5821726A JP56120932A JP12093281A JPS5821726A JP S5821726 A JPS5821726 A JP S5821726A JP 56120932 A JP56120932 A JP 56120932A JP 12093281 A JP12093281 A JP 12093281A JP S5821726 A JPS5821726 A JP S5821726A
- Authority
- JP
- Japan
- Prior art keywords
- current
- projection
- lamp
- shutter
- supplied
- 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
Classifications
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
- G03B21/00—Projectors or projection-type viewers; Accessories therefor
- G03B21/14—Details
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Projection Apparatus (AREA)
Abstract
Description
【発明の詳細な説明】
この発明は、映写用ランプの長寿命化を計るとともに、
シャッタの閉時における消費電力の削減および不要な光
の排除を行なうようにした映写用電源装置ｄに関する。[Detailed Description of the Invention] This invention aims to extend the life of a projection lamp, and
The present invention relates to a projection power supply device d that reduces power consumption and eliminates unnecessary light when the shutter is closed.
従来、映写装置は、映写用フィルムを駒送りするととも
に、駒送りしたフィルムにキセノンランプなどからなる
光源用ランプの光を投射するものであり、フィルム駒送
りに同期してランプとフィルムとの間に設けられた開閉
自在のシャッタを開閉させる。Conventionally, a projection device advances a projection film frame by frame and projects light from a light source lamp, such as a xenon lamp, onto the film that has been advanced frame by frame. The shutter, which can be opened and closed, is opened and closed.
そして、従来の映写用電源装置は、シャッタの開閉に無
関係に、点灯中の光源用ランプに所定の一定直流電流、
すなわち大電流の映写用電流を供給し続け、消費電力の
大きなものとなるとともにシャッタの閉時に不要な光が
発生する欠点があり、また、一般に、ランプに供給され
る映写用電流にはリップル成分が含まれるとともに、リ
ップル成分が大きい程ランプの寿命が短かくなるため、
と 。Conventional projection power supplies supply a predetermined constant DC current to the light source lamp while it is lit, regardless of whether the shutter is opened or closed.
In other words, a large current for projection is continuously supplied, resulting in large power consumption and the disadvantage that unnecessary light is generated when the shutter is closed.Furthermore, the projection current supplied to the lamp generally has a ripple component. In addition, the larger the ripple component, the shorter the lamp life.
and .
（に、サイリスタなどにより交流を直流に変換する方式
の映写用電源装置では、前述のリップル成分を除去する
ために大型の平滑回路を設ける必要がある。(Furthermore, in a projection power supply device that uses a thyristor or the like to convert alternating current to direct current, it is necessary to provide a large smoothing circuit to remove the aforementioned ripple component.
この発明は、前記の点に留意してなされたものであり、
つぎにこの発明を、その実施例を示した図而とともに詳
細に説明する。This invention was made with the above points in mind,
Next, the present invention will be explained in detail along with diagrams showing embodiments thereof.
ます、１実施例を示した第１図および第２図について説
明する。First, FIG. 1 and FIG. 2 showing one embodiment will be explained.
第１図において、（１）は定速で駒送りされるフィルム
、Ｃ２）は映写用ランプ（３）とフィルム（１）との間
に設けられた開閉自在の機械式シャッタであり、フィル
ム（１）の駒送りに同期して開閉する。１４）は高周波
発生回路であり、ランプ（３１を点灯させるときに、高
周波発生回路（４）の高周波がカップリング用変圧器（
５）の１次コイ／ｌ／ （５ａ）’ 、 ２次コイル（
５ｂ）を介してランプ（３１に供給される。（６）はス
イッチングレギュレータなどからなる出力可変型の直流
電源であり、変圧器（５）の２次コイル（５ｂ）を介し
てランプ（３）に直流を供給する。（７ａ）、（７ｂ）
は直流電源（６）の出力電流を設定する第１．第２設定
器であり、第１設定器（７ａ）の動作により直流電源（
６）からランプ（３）に、ランプ（３）の点灯を維持す
るだけの小電流すなわち点灯維持用電流が供給され、第
２設定器（７ｈ）の動作により直流電源（６）からラン
プ（３）に、映写に必要な大電流すなわち直流電源（６
）のピーク電流である映写用電流が供給される。（８）
は近接スイッチからなる検出器であり、シャッタ（２）
の開閉時の位置変化からシャッタ（２）の開閉を検出す
る。（９）は検出器＋８１の検出信号が入力される電流
切換器であり、シャッタ１２）の開時には第１出力端子
（９ａ）から第１制御信号を出力するとともに、シャッ
タ（２）の閉時には第２出力端子（９ｈ）から第２制御
信号を出力する。In Figure 1, (1) is a film that is fed at a constant speed, C2) is a mechanical shutter that can be opened and closed between the projection lamp (3) and the film (1), and C2) is a mechanical shutter that can be opened and closed between the projection lamp (3) and the film (1). It opens and closes in synchronization with the frame feeding in 1). 14) is a high frequency generation circuit, and when lighting the lamp (31), the high frequency of the high frequency generation circuit (4) is transmitted to the coupling transformer (
5) primary coil /l/ (5a)', secondary coil (
5b) is supplied to the lamp (31). (6) is a variable output DC power supply consisting of a switching regulator, etc., and is supplied to the lamp (31) via the secondary coil (5b) of the transformer (5). Supply direct current to (7a), (7b)
is the first one that sets the output current of the DC power supply (6). This is a second setting device, and the operation of the first setting device (7a) causes the DC power supply (
6) supplies the lamp (3) with a small current that is sufficient to keep the lamp (3) lit, that is, a lighting maintenance current. ), the large current required for projection, that is, the DC power supply (6
) is supplied with a projection current which is the peak current of the current. (8)
is a detector consisting of a proximity switch, and a shutter (2)
The opening and closing of the shutter (2) is detected from the position change when the shutter (2) is opened and closed. (9) is a current switching device to which the detection signal of the detector +81 is input, and when the shutter 12) is opened, the first control signal is output from the first output terminal (9a), and when the shutter (2) is closed, the first control signal is outputted from the first output terminal (9a). A second control signal is output from the second output terminal (9h).
（ｌｏａ）、（１０ｂ）は第１．第２アナログスイツチ
であり、第１制御信号により第１アナログスイツチ（Ｉ
０ｆ１）が動作するとともに第１アナログスイツチ（
１０ａ）の動作により第１設定器（７ａ）が動作し、第
２制御信号により第２アナログスイツチ（ｌＱｂ）が動
作するとともに第２アナログスイツチ（ｌＱｈ）の動作
により第２設定器（７１１）が動作する。ＯＢは直流電
源（６）の出力端子間に設けられたバイパス用コンデン
サであり、高周波発生回路（４）から直流電源（６）へ
の高周波の流入を防止する。、なお、ランプ１３）には
キセインランプ、などが使用されている。(loa), (10b) is the first. The second analog switch is a second analog switch, and the first analog switch (I
0f1) operates and the first analog switch (
10a) operates the first setter (7a), the second control signal operates the second analog switch (lQb), and the operation of the second analog switch (lQh) causes the second setter (711) to operate. Operate. OB is a bypass capacitor provided between the output terminals of the DC power source (6), and prevents high frequency waves from flowing into the DC power source (6) from the high frequency generation circuit (4). Note that a xein lamp or the like is used as the lamp 13).
そして、まず直流電源（６）の直流に高周波発生回路（
４）の高周波を重畳し、高周波の重畳した直流によりラ
ンプ＋３１か点灯し、つきに、う゛ンプ（３）の点灯中
にフィルムｍが駒送りされ始めると、シャッタ＋２＋が
駒送りに同期して開閉動作をくり返し、シャッタ（２）
の開閉が検出器（８）により検出され、第２図（＋１）
に示すように、シャッタ（２）が閉じる期間Ｔｓには、
検出器１８＋から電流切換器（９）に論理１の検出信号
が出力され、シャッタ＋２１が開く期間ＴＯには、検出
器（８）°から電流切換器（９）に論理Ｏの検出信号が
出力され、期間＋ｐｓ ｉこおける検出器（８）からの
検出信号により、同図山）に示すように、電流切換器（
９）の第１出力端子（９コ０から第１アナログスイツチ
（１０ａ）に第１制御信号が出力され、期間ＴＯにおけ
る検出器（８）からの検出信号により、同図（Ｃ）に示
すように、電流切換器（９）の第２出力端子（９ｈ）か
ら第２アナログスイツチ（１０ｈ）に第２制御信号が出
力され、両制御信号それぞれにより両アナログスイッチ
（１０ａ）。First, a high frequency generation circuit (
4) is superimposed, and the lamp +31 is lit by the superimposed high frequency DC current.Finally, when the film m starts to advance frame by frame while the pump (3) is lit, the shutter +2+ is synchronized with the frame advance. Repeat the opening/closing operation and close the shutter (2).
The opening and closing of is detected by the detector (8), and as shown in Fig. 2 (+1)
As shown in , during the period Ts during which the shutter (2) closes,
A detection signal of logic 1 is output from the detector 18+ to the current switch (9), and a detection signal of logic 0 is output from the detector (8)° to the current switch (9) during the period TO when the shutter +21 is open. The detection signal from the detector (8) during the period + ps i causes the current switch (
The first control signal is output from the first output terminal (9-0 of 9) to the first analog switch (10a), and the detection signal from the detector (8) during the period TO causes the signal to be output as shown in FIG. Then, a second control signal is outputted from the second output terminal (9h) of the current switch (9) to the second analog switch (10h), and both analog switches (10a) are activated by both control signals, respectively.
（ｌＱｂ）それぞれが交互に動作し、両アナログスイッ
チ（１０ａ）、（ｊｏｂ）それぞれの動作ニヨリ、同図
（ｄ）に示すように、直流電源（６）からランプ１３＞
に供給される直流電流が、期間Ｔｓには点灯維持用電流
Ｉｓに制御され、期間ＴＯには点灯維持用電流Ｉｓより
大きな映写用電流Ｔｏに制御され、シャッタ（２）の閉
時にはランプ＋３１の光量が、シャッタ（２）の開時の
光はより減少する。(lQb) each operates alternately, and the operation of both analog switches (10a) and (job) respectively, as shown in FIG.
The direct current supplied to the lamp is controlled to the lighting maintenance current Is during the period Ts, and is controlled to the projection current To which is larger than the lighting maintenance current Is during the period TO, and when the shutter (2) is closed, the lamp +31 is The amount of light is further reduced when the shutter (2) is open.
したがって、前記実施例によると、シャッタ（２）の開
閉が検出器（８）により検出されるとともに、検出器（
８）の検出信号により、シャッタ１２＋の開時には直流
電源（６）からランプ１３）に映写用電流が供給され、
シャッタ１２＋の閉時には直流電源（６）からランプ（
３）に映写用電流より小さな点灯維持用電流が供給され
、ランプ（３）には大電流である映写用電流が量大的に
供給されるとともに、リップル成分が減少するため、ラ
ンプ（３）の長寿命化を計ることができるとともに、従
来のような大型の平滑回路を設ける必要がなく、さらに
シャッタ（２）の閉時における消費′出力の削減および
不要な光の排除を行なうことかできる。Therefore, according to the embodiment, the opening and closing of the shutter (2) is detected by the detector (8), and the detector (8) detects the opening and closing of the shutter (2).
According to the detection signal 8), when the shutter 12+ is opened, a projection current is supplied from the DC power supply (6) to the lamp 13).
When the shutter 12+ is closed, the lamp (
A lighting maintenance current smaller than the projection current is supplied to the lamp (3), and a large amount of the projection current, which is a large current, is supplied to the lamp (3), and the ripple component is reduced. In addition to prolonging the lifespan of the shutter, there is no need to provide a large smoothing circuit as in the conventional case, and it is also possible to reduce power consumption and eliminate unnecessary light when the shutter (2) is closed. .
つぎに、他の実施例を示した第３図について説明する。Next, FIG. 3 showing another embodiment will be explained.
同図において第１図と同一記号は同一のものを示し、第
１図と異なる点はつきの点である。すなわち、第１図の
直流電源（６）の代わりに、シャッタ１２＋の開閉に無
関係に、抵抗Ｇ４を介してランプ（３）に点灯維持用電
流を供給し続ける小容量の第１電源（１１と、シャッタ
（２）の開時に動作し第１電源０３とともにランプ（３
）に映写用電流を供給する第２電源０４）とからなる直
流電源（６１を設け、第１図の電流切換器（９）の代わ
りに、シャッタＣ２＋の開時における検出器＋８１の検
出信号により動作する電流切換器（９１を設け、電流切
換器（９１の制御信号によりアナログスイッチ（Ｉｏｃ
）を動作させるとともに、アナログスイッチ（１０Ｃ）
の動作により第２電源０荀の電流を設定する設定器（７
Ｃ）を動作させるようにした点である。In this figure, the same symbols as in FIG. 1 indicate the same things, and the difference from FIG. 1 is the dot. That is, instead of the DC power supply (6) in FIG. 1, a small-capacity first power supply (11 and , operates when the shutter (2) is opened, and the lamp (3) is activated together with the first power supply 03.
) and a second power supply 04) that supplies a projection current to An operating current switch (91) is provided, and an analog switch (Ioc) is provided by the control signal of the current switch (91).
) and operate the analog switch (10C)
A setting device (7) sets the current of the second power source 0 by the operation of
C) is made to operate.
そして、シャッタ（２）の閉時には、直流電源（６１の
の開時には、検出器（８）の検出信号により電流切換器
（９１を動作させ、電流切換器（９１の出力によりアナ
ログスイッチ（ｔＯＣ）を動作させるとともに、アナロ
グスイッチ（ｔｏｅ）の動作により設定器（７Ｃ）を動
作させ、設定器（７Ｃ）の動作により第２電源０（４）
の出力電流を制御して、直流電源ｔ６Ｓからランプ（３
）に、両電源＋１：ｉ 、 Ｑ４１からの出力電流にも
とづく映写用電流を供給する。When the shutter (2) is closed, when the DC power supply (61) is open, the current switch (91) is operated by the detection signal of the detector (8), and the analog switch (tOC) is operated by the output of the current switch (91). At the same time, the setting device (7C) is operated by the operation of the analog switch (TOE), and the second power supply 0 (4) is operated by the operation of the setting device (7C).
control the output current of the lamp (3) from the DC power supply t6S.
) is supplied with a projection current based on the output current from both power supplies +1:i and Q41.
したがって、前記実施例によると、前述と同様にランプ
（３）に映写用電流を間欠的に供給しランプ（３）の長
寿命化を計るとともに、シャッタ（２）の閉時における
消費電力の開城および不要な光の排除を行なうことがで
き、さらに、直流電源（６１に、シャッタ（２）の開閉
に無関係に動作する小容量の第１電源０．１と、シャッ
タｉ２１の開時にのみ動作する第２電源（′１（１）と
を設けたこと番こより回路構成を一層簡素化することが
できる。Therefore, according to the embodiment, as described above, projection current is intermittently supplied to the lamp (3) to extend the life of the lamp (3), and the power consumption when the shutter (2) is closed is reduced. In addition, the DC power supply (61) is equipped with a small-capacity first power supply 0.1 that operates regardless of whether the shutter (2) is opened or closed, and a first power supply that operates only when the shutter (i21) is opened. By providing the second power supply ('1(1)), the circuit configuration can be further simplified.
さらに他の実施例を示した第４図について説明する。
−
図面番こおいて、第１図と同一記号は同一のものを示し
、第１図と異なる点は、直流電源（６）と９１＋ｌ設定
器（７ａ） 、（７１１）との間に、切り換え緩和用の
積分器（］５１を設け、直流電源（６）における点灯維
持用電流から映写用電流への切や換えおよび映写用電流
がら点灯維持１ｆｌ ？ｈ流への切り換えを徐々に行な
わせ、切り換え番こより映写用電流供給時の歪電流の発
生を防１卜する。Further, FIG. 4 showing another embodiment will be explained.
- In the drawing numbers, the same symbols as in Fig. 1 indicate the same things, and the difference from Fig. 1 is that there is a A relaxation integrator (51) is provided to gradually switch the lighting maintenance current to the projection current in the DC power supply (6) and to switch the projection current to the lighting maintenance current 1fl?h, The switching number prevents generation of distorted current when supplying current for projection.
したかつて、前記実施例によると、前述と同様に、ラン
プ（３）に間欠的に映写用電流を供給しランプ（３）の
長寿命化を計るとともに、シャツタ閉時における消費電
力の削減および不要な光の排除を行なうことかでき、さ
らに、点灯維持用電流から映写用電流または映写用電流
から点灯維持用電流の切り換えによる歪電流の発生を防
上することができる。According to the above-mentioned embodiment, as described above, projection current is intermittently supplied to the lamp (3) to extend the life of the lamp (3), and to reduce and eliminate power consumption when the shutter is closed. Furthermore, it is possible to prevent distortion currents from being generated due to switching from the lighting maintenance current to the projection current or from the projection current to the lighting maintenance current.
以−Ｌのように、この発明の映写用電源装置によると、
シャッタの開時に映写用電流を映写用ランプに供給する
とともに、シャッタの閉時に映写用電流より小さな点灯
維持用電流を映写用ランプに供給し、映写用ランプの長
寿命化を計るとともに、ンヤツタの閉時における消費電
力の削減および不要な光の排除を行なうことができるも
のである。As shown in I-L, according to the projection power supply device of the present invention,
When the shutter is opened, a projection current is supplied to the projection lamp, and when the shutter is closed, a lighting maintenance current, which is smaller than the projection current, is supplied to the projection lamp, thereby extending the life of the projection lamp. It is possible to reduce power consumption and eliminate unnecessary light when closed.
図面はこの発明の映写用電源装置の実施例を示し、第１
図は１実施例のブロック図、第２図は第１図の動作説明
用タイミングチャート、第３図は他の実施例のブロック
図、第４図はさらに他の実施例のブロック図である。
ｍ・・・フィルム、（２）・・・シャッタ、（３）・・
・映写用ランプ、（６＋ 、 （６５・・直流電源、（
８）・・・検出器、＋ｑ＋ 、 ｔ９ｆ 電流切換器
。
代理人 弁理士 藤田龍太部
第１ｇ
第２図The drawings show an embodiment of the power supply device for projection according to the present invention.
1 is a block diagram of one embodiment, FIG. 2 is a timing chart for explaining the operation of FIG. 1, FIG. 3 is a block diagram of another embodiment, and FIG. 4 is a block diagram of still another embodiment. m...Film, (2)...Shutter, (3)...
・Projection lamp, (6+, (65...DC power supply, (
8)...Detector, +q+, t9f current switch. Agent: Patent Attorney Ryuta Fujita Section 1g Figure 2
Claims (1)
シャッタを設けるとともに、前記ランプの直流電源と、
前記シャッタの開閉を検出する検出器と、該検出器の検
出信号により前記直流電源から前記ランプに供給される
電流を切換制御する電流切換器とを備え、前記シャッタ
の閉時には前記直流電源から前記ランプに点灯維持用電
流を供給な映写用電流を供給するようにしたことを特徴
とする映写用電源装置。■ A shutter that can be opened and closed is provided between the projection lamp and the projection film, and a DC power source for the lamp is provided,
A detector for detecting opening/closing of the shutter; and a current switching device for switching and controlling the current supplied from the DC power supply to the lamp based on the detection signal of the detector; 1. A power supply device for projection, characterized in that it supplies a projection current that supplies a lighting maintenance current to a lamp.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP56120932A JPS5821726A (en) | 1981-07-31 | 1981-07-31 | Electric power source device for projection |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP56120932A JPS5821726A (en) | 1981-07-31 | 1981-07-31 | Electric power source device for projection |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS5821726A true JPS5821726A (en) | 1983-02-08 |
Family
ID=14798536
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP56120932A Pending JPS5821726A (en) | 1981-07-31 | 1981-07-31 | Electric power source device for projection |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5821726A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6334897A (en) * | 1986-07-29 | 1988-02-15 | 東芝ライテック株式会社 | Method of lighting xenon lamp |
| JPS63169634A (en) * | 1987-01-08 | 1988-07-13 | Sansha Electric Mfg Co Ltd | Power unit for arc discharge lamp |
| KR20030017049A (en) * | 2001-08-23 | 2003-03-03 | 엘지전자 주식회사 | Power supply for projector |
| EP2325692A1 (en) | 2009-11-18 | 2011-05-25 | Canon Kabushiki Kaisha | Image projection apparatus |
-
1981
- 1981-07-31 JP JP56120932A patent/JPS5821726A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6334897A (en) * | 1986-07-29 | 1988-02-15 | 東芝ライテック株式会社 | Method of lighting xenon lamp |
| JPS63169634A (en) * | 1987-01-08 | 1988-07-13 | Sansha Electric Mfg Co Ltd | Power unit for arc discharge lamp |
| JPH0466490B2 (en) * | 1987-01-08 | 1992-10-23 | Sansha Electric Mfg Co Ltd | |
| KR20030017049A (en) * | 2001-08-23 | 2003-03-03 | 엘지전자 주식회사 | Power supply for projector |
| EP2325692A1 (en) | 2009-11-18 | 2011-05-25 | Canon Kabushiki Kaisha | Image projection apparatus |
| US8556434B2 (en) | 2009-11-18 | 2013-10-15 | Canon Kabushiki Kaisha | Image projection apparatus having shutter mechanism for hiding projection image |
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