JPH01116535A - Cooling device for projector - Google Patents
Cooling device for projectorInfo
- Publication number
- JPH01116535A JPH01116535A JP62271915A JP27191587A JPH01116535A JP H01116535 A JPH01116535 A JP H01116535A JP 62271915 A JP62271915 A JP 62271915A JP 27191587 A JP27191587 A JP 27191587A JP H01116535 A JPH01116535 A JP H01116535A
- Authority
- JP
- Japan
- Prior art keywords
- lamp
- fan
- high speed
- certain time
- rotation
- 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
- 238000001816 cooling Methods 0.000 title claims abstract description 18
- 229910052736 halogen Inorganic materials 0.000 description 10
- 150000002367 halogens Chemical class 0.000 description 9
- 239000011521 glass Substances 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 230000005540 biological transmission Effects 0.000 description 1
- 230000004397 blinking Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 210000005069 ears Anatomy 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000005868 electrolysis reaction Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Landscapes
- Projection Apparatus (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は、プロジェクタの光源を冷却する冷却装置に関
する。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a cooling device for cooling a light source of a projector.
一般に原稿ガラス上に載置されたカラー原稿を読み取る
カラー画像読取装置を用いて、カラーネガフィルムなど
の透過原稿を読み取る装置としては、例えば、第４図に
概略構成を示すようなものがある。An example of an apparatus for reading a transparent original such as a color negative film using a color image reading apparatus that generally reads a color original placed on an original glass is shown in FIG. 4, the schematic configuration of which is shown in FIG.
図において、１は、通常の反射原稿を載置する原稿ガラ
ス、２は、該原稿を照明する光源、３は、ｙＸ′ｌＩ４
画像をイメージセンサ４のＣＣＤ （電荷結合素子）ア
レーのような光電変換素子アレー上に結像するレンズ、
５は、前記光源２．レンズ３及びイメージセンサ４によ
り構成される読み取りユニットで、前記原稿ガラスｌに
沿ってその下方で往復動する。In the figure, 1 is an original glass on which a normal reflective original is placed, 2 is a light source that illuminates the original, and 3 is yX'lI4.
a lens that focuses the image onto a photoelectric conversion element array such as a CCD (charge-coupled device) array of the image sensor 4;
5 is the light source 2. A reading unit composed of a lens 3 and an image sensor 4 reciprocates along and below the original glass l.
また、６は投影部で、内面球形の反射鏡７の前方に設け
られ、カラーネガフィルム等の透過原稿Ｆを照明する光
源であるハロゲンランプ８と、カラーバランスを補正す
るための色補正フィルタ９と、透過原稿Ｆの画像を原稿
ガラス！上に結像するためのレンズｌＯとから構成され
ている。Reference numeral 6 denotes a projection section, which is provided in front of a reflecting mirror 7 having a spherical inner surface, and includes a halogen lamp 8 which is a light source for illuminating a transparent original F such as a color negative film, and a color correction filter 9 for correcting color balance. , the image of the transparent original F on the original glass! It consists of a lens lO for forming an image on the image.
そして、１１は、該レンズ１０からの光路を折り曲げる
ミラー、１２は、折り曲げられたレンズｌＯから発散す
る光束を平行光束に変換するためのフレネルレンズであ
る。11 is a mirror that bends the optical path from the lens 10, and 12 is a Fresnel lens that converts the light beam diverging from the bent lens 10 into a parallel light beam.
ここで、該フレネルレンズ１２は、原稿ガラス１に密着
して置かれ、接する面は拡散面になっている。Here, the Fresnel lens 12 is placed in close contact with the original glass 1, and the surface in contact with it is a diffusing surface.
一方、投影部６の下方には、電源ユニット！５が設置さ
れており、前記投影部６の前半部と後半部とをそれぞれ
冷却するファン１４．１３を駆動するとともに、ハロゲ
ンランプ８を点燈する電力を供給する。On the other hand, below the projection section 6 is a power supply unit! 5 is installed, and drives fans 14 and 13 that cool the front and rear parts of the projection section 6, respectively, and supplies power to turn on the halogen lamp 8.
以上のような構成において透過原稿Ｆを読み取ったイメ
ージセンサ４からの出力は、Ａ／Ｄ変換されて一般に８
ビット程度のＲ，Ｇ、Ｂデジタルデータとして出力され
る。In the above configuration, the output from the image sensor 4 that reads the transparent original F is A/D converted and is generally 8
It is output as bit-sized R, G, and B digital data.
しかしながら、写真用フィルム、特にネガフィルムにお
いては、適正露出から外れたフィルムであっても再生画
像を得たい場合が多く、このためオーバー露光のネガフ
ィルムのときは、ハロゲンランプ８の光量を増加させ、
アンダー露光のネガフィルムのときは、ハロゲンランプ
８の光量を低下させる必要がある。However, when it comes to photographic film, especially negative film, it is often necessary to obtain a reproduced image even if the film is not properly exposed. ,
For underexposed negative films, it is necessary to reduce the amount of light from the halogen lamp 8.
そこで、光量を増加させて点燈すると、ハロゲンランプ
８から発生する熱により投影部６の内壁の温度は軽く２
００℃以上になってしまうので、冷却のためファン１３
．１４を使用している。Therefore, when the light intensity is increased and the light is turned on, the temperature of the inner wall of the projection section 6 slightly decreases by 2 due to the heat generated from the halogen lamp 8.
Since the temperature will exceed 00℃, fan 13 will be turned on for cooling.
．． 14 is used.
従来の冷却方法は、例えば、複写において同一画像を３
枚得るリーダ（図外）の連続読みと他の画像１枚を得る
場合を示した第３図のタイミングチャートに見られるよ
うに、イメージセンサ４により画像を読み取るリーダか
らの光量制御信号が３秒間ＯＮとなり１秒間ＯＦＦする
動作を繰り返し、連続読み取りが終ると前記信号はＯＦ
Ｆのままの状態を続け、その間に他の画像に設定替えを
した後、１枚分の３秒間ＯＮを行うわけである。Conventional cooling methods, for example,
As can be seen in the timing chart in Figure 3, which shows continuous reading by the reader (not shown) to obtain one image and one image to be obtained, the light intensity control signal from the reader that reads the image with the image sensor 4 is applied for 3 seconds. The signal turns ON and turns OFF for 1 second, and when continuous reading is completed, the signal turns OFF.
It remains in the F state, changes settings to another image during that time, and then turns on for 3 seconds for one image.
この指示信号に同期してハロゲンランプ８の電圧は０Ｎ
１０ＦＦＬ／、ファン１３．１４も高速回転／停止を行
い冷却するわけである。In synchronization with this instruction signal, the voltage of the halogen lamp 8 is set to 0N.
10FFL/, and the fans 13 and 14 also perform high-speed rotation/stop for cooling.
しかしながら、ハロゲンランプ消燈後、゛直ちにファン
を停止すると、急激にランプ回りの温度が上昇してしま
い、一方、これを防止するためにファンを連続回転させ
ると電気の浪費となるばかりか、騒音の点でも間通であ
る。However, if the fan is stopped immediately after the halogen lamp is turned off, the temperature around the lamp will rise rapidly.On the other hand, if the fan is continuously rotated to prevent this, it will not only waste electricity but also cause noise. It is also a bit of a cliché.
また、単純にランプ点燈中はファンを高速で、一方、ラ
ンプを消燈したら低速で回転させると、連続で画像を読
み取る際に、例えば、ランプが３秒間ＯＮ、１秒間ＯＦ
Ｆという状態を繰り返すため、ファンも同様に高速、低
速と回転数が変化するので、風切り音も高温、低温と頻
繁に変調し、非常に耳障りであるという不都合な点があ
った。 本発明は、叙上の事情に鑑みてなされたもので
、画像の連続読み取り中は申すまでもなく、読取り終了
後の騒音も防止し、しかも十分な冷却効果の得られる冷
却装置を得ることを目的としている。In addition, if you simply rotate the fan at high speed while the lamp is on, and at low speed when the lamp is turned off, for example, when reading images continuously, the lamp will turn on for 3 seconds and turn off for 1 second.
Since the F state is repeated, the rotation speed of the fan similarly changes from high to low, so the wind noise also frequently modulates between high and low temperatures, which is very unpleasant to the ears. The present invention has been made in view of the above-mentioned circumstances, and aims to provide a cooling device that can prevent noise not only during continuous image reading but also after reading has been completed, and that can provide a sufficient cooling effect. The purpose is
本発明に係るプロジェクタの冷却装置は、ランプ冷却フ
ァンをランプ点燈中と消燈した瞬間から一定時間までは
高速で、それ以後の一定時間は低速で回転させてから停
止するように制御することとしたものである。なお、ラ
ンプ消燈後の高速で回転させる一定時間は、画像の連続
読取りの際のランプの消燈時間よりも長くしである。The projector cooling device according to the present invention controls the lamp cooling fan so that it rotates at high speed for a certain period of time from the moment the lamp is turned on and off, and then at low speed for a certain period of time thereafter, and then stops. That is. Note that the fixed time period during which the lamp is rotated at high speed after the lamp is turned off is longer than the time period during which the lamp is turned off during continuous image reading.
（作用）
したがって本発明の冷却装置によれば、連続読取り中に
おいてランプが一時消燈されても、次の点燈までファン
の高速回転が続いているため高速が維持され、また、読
取り終了後も一定時間高速回転を続け、その後、低速回
転をさらに他の一定時間行ってから停止するので、投影
部の十分な冷却をすることができ、しかも耳障りな騒音
を発生させない。(Function) Therefore, according to the cooling device of the present invention, even if the lamp is temporarily turned off during continuous reading, the high speed is maintained because the fan continues to rotate at high speed until the next lighting. The projector continues to rotate at high speed for a certain period of time, and then continues to rotate at low speed for another certain period of time before stopping, so that the projection section can be sufficiently cooled and does not generate harsh noise.
以下、本発明の一実施例を図面に基づいて説明する。 Hereinafter, one embodiment of the present invention will be described based on the drawings.
木一実施例に適用されるプロジェクタの概略構成は、第
４図とほぼ同様であり、また、その電気回路のブロック
図は、第２図に示すものである。The schematic configuration of the projector applied to the embodiment is almost the same as that shown in FIG. 4, and the block diagram of its electric circuit is shown in FIG.
第２図において、電源ユニット２０は、光量制御信号Ｓ
によってハロゲンランプ８を点滅動作させる第１電源部
２１と、同じく前記信号Ｓを受けて光源冷却用のファン
１３．１４を運転する第２電源部２２を内設しており、
ＡＣｌｏｏＶがプラグ２３を介して印加される。In FIG. 2, the power supply unit 20 receives a light amount control signal S
A first power supply unit 21 that operates the halogen lamp 8 in a blinking manner according to the above-mentioned signal S, and a second power supply unit 22 that operates the fans 13 and 14 for cooling the light source in response to the signal S are installed therein.
AClooV is applied via plug 23.
そして、例えば、従来例で述べたと同様に、画像３枚を
得るリーダの連続読みと他の画像１枚を得る場合には、
第１図のタイミングチャートに示すように、リーダから
送られて来る光量制御信号Ｓの電圧により、第１電源部
２１は、該信号Ｓの０Ｎ１０ＦＦに同期してハロゲンラ
ンプ８を直流定電圧で３秒間点灯し、１秒間消燈すると
いう状態を繰り返すが、第２電源部２２は前記信号Ｓの
電圧を受けるとファン１３．１４に２４Ｖを印加して高
速回転させるが、前記信号Ｓの電圧が断たれると、一定
時間（この場合は１秒間）経過後に印加電圧を１９Ｖに
低下して低速回転に変更させ、さらに所定時間（この場
合は３分間）低速回転を行わせた後、停止させる。すな
わち、投影部６が十分に冷却されてから、ファン１３．
１４は停止することとなるわけである。For example, in the same way as described in the conventional example, when the reader continuously reads three images and obtains one other image,
As shown in the timing chart of FIG. 1, the voltage of the light amount control signal S sent from the reader causes the first power supply section 21 to operate the halogen lamp 8 at a constant DC voltage for 3 seconds in synchronization with the 0N10FF of the signal S. The state of turning on for one second and turning off for one second is repeated. When the second power supply unit 22 receives the voltage of the signal S, it applies 24V to the fan 13.14 to rotate it at high speed, but when the voltage of the signal S is When it is disconnected, after a certain period of time (1 second in this case), the applied voltage is reduced to 19V and the rotation is changed to low speed, and after further low speed rotation for a specified period of time (3 minutes in this case), it is stopped. . That is, after the projection section 6 has been sufficiently cooled, the fan 13.
14 will be stopped.
したがって、連続読取り中に前記信号が例えば１秒間中
断しても第２電源部２２は、その１秒間以上の時間経過
がないとファン１３．１４を低速にしないので、高速回
転は、連続読取り中はもちろん、その終了後さらに１秒
間以上の一定時間が経過するまで維持されるため、変調
音による耳障りな騒音は発生することがない。Therefore, even if the signal is interrupted for, for example, 1 second during continuous reading, the second power supply unit 22 will not reduce the speed of the fans 13 and 14 until the time period of 1 second or more has elapsed, so that high-speed rotation will not occur during continuous reading. Of course, this is maintained until a certain period of one second or more has elapsed after the end, so no harsh noise is generated due to the modulated sound.
なお、本−実施例では、ランプ点燈電圧を定電圧電溶と
して説明したが、透過厚ＭＦのアンダー露光、又はオー
バー露光の状態に応じて可変してもよいことは、いうま
でもない。In this embodiment, the lamp lighting voltage has been explained as constant voltage electrolysis, but it goes without saying that it may be varied depending on the under-exposure or over-exposure state of the transmission thickness MF.
また、冷却用ファン１３．１４の回転数も、ハロゲンラ
ンプ８の点灯電圧、すなわち発熱量に応じて変化させて
もよい。Further, the rotation speed of the cooling fans 13 and 14 may also be changed depending on the lighting voltage of the halogen lamp 8, that is, the amount of heat generated.
以上説明したように本発明は、プロジェクタの投影部を
冷却するファンの回転数を、光量制御信号のＯＮにより
高速とし、ＯＦＦに際じては、−定時間高速を維持させ
た後、低速に減じ、さらに一定時間経過してから停止さ
せる電源部を設けた構成としたため、画像連続読取り中
に耳障りな騒音を発生することなく、また、画像読取り
後の騒音も必要最小限に抑えつつ投影部を十分に冷却す
ることができるという効果がある。As explained above, the present invention increases the rotation speed of the fan that cools the projection section of the projector by turning on the light amount control signal, and when turning it off, maintains the high speed for a certain period of time and then lowers the rotation speed. The structure is equipped with a power supply section that stops the power source after a certain period of time has elapsed, so that no harsh noise is generated during continuous image reading, and while noise after image reading is kept to a minimum, the projection section This has the effect of being able to sufficiently cool the
第１図は、本発明の一実施例のランプ電圧とファン回転
数とのタイミングチャート、第２図は、同じく電気回路
のブロック図、第３図は、従来例の第１図相当図、第４
図は、一般のプロジェクタの概略構成図である。
４−−イメージセンサ
８・−一ハロゲンランプ
１３−−−−−ファン
１４−・・−拳フアン
２２−−−−−−第２電源部
Ｆ−・・・−透過原稿FIG. 1 is a timing chart of lamp voltage and fan rotation speed according to an embodiment of the present invention, FIG. 2 is a block diagram of the electric circuit, and FIG. 3 is a diagram corresponding to FIG. 1 of the conventional example. 4
The figure is a schematic configuration diagram of a general projector. 4--Image sensor 8.--Halogen lamp 13--Fan 14--Fist fan 22--Second power supply section F--Transparent original
Claims (2)
べき原稿の画像を投影するプロジェクタにおいて、光源
冷却用のファンを、ランプ点灯中及び消燈した瞬間から
一定時間まで高速回転させ、該一定時間経過に引き続き
さらに他の一定時間に低速回転させた後、停止させるよ
うに動作する電源部を設けたことを特徴としたプロジェ
クタの冷却装置。(1) In a projector that projects an image of a document to be read by an image sensor by lighting a lamp, a fan for cooling the light source is rotated at high speed while the lamp is on and from the moment the light is turned off until a certain period of time elapses. A cooling device for a projector, characterized in that a power supply section is provided that operates to rotate at a low speed for a certain period of time and then to stop.
は、画像の連続読取りにおいてランプを消燈する時間よ
りも長くしたことを特徴とする特許請求の範囲第１項記
載のプロジェクタの冷却装置。(2) A cooling device for a projector according to claim 1, characterized in that the certain period of time during which the fan is rotated at high speed after the lamp is turned off is longer than the time during which the lamp is turned off during continuous image reading. .
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62271915A JPH01116535A (en) | 1987-10-29 | 1987-10-29 | Cooling device for projector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62271915A JPH01116535A (en) | 1987-10-29 | 1987-10-29 | Cooling device for projector |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH01116535A true JPH01116535A (en) | 1989-05-09 |
Family
ID=17506647
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP62271915A Pending JPH01116535A (en) | 1987-10-29 | 1987-10-29 | Cooling device for projector |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH01116535A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6322218B1 (en) * | 1998-12-28 | 2001-11-27 | Fujitsu Limited | Projection type display |
| US6476560B2 (en) | 2000-04-25 | 2002-11-05 | Sanyo Electric Co., Ltd. | Liquid crystal projector |
-
1987
- 1987-10-29 JP JP62271915A patent/JPH01116535A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6322218B1 (en) * | 1998-12-28 | 2001-11-27 | Fujitsu Limited | Projection type display |
| US6476560B2 (en) | 2000-04-25 | 2002-11-05 | Sanyo Electric Co., Ltd. | Liquid crystal projector |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US7438439B2 (en) | Temperature adjusting device for an LED light source | |
| JP2000056213A5 (en) | ||
| JPS6218192A (en) | Electronic still camera | |
| US5636001A (en) | Digital film camera and digital enlarger | |
| US4698683A (en) | Video conversion kit for projectors | |
| MY114452A (en) | Compact electronic digital still camera equipped with converter lens | |
| JPH01116535A (en) | Cooling device for projector | |
| JPH08146512A (en) | Projector-attached composite camera | |
| JPH07199290A (en) | Method and device for photography lighting using incident light photometer | |
| JPS63235923A (en) | Cooling device for projector of image reader | |
| JPH03273232A (en) | Image projecting device | |
| KR0124952B1 (en) | Iris priority lens-shutter device of a camera | |
| JPS63292121A (en) | Picture projecting device | |
| JPH042536Y2 (en) | ||
| JP2611846B2 (en) | camera | |
| JP3191933B2 (en) | camera | |
| JP2873873B2 (en) | Still image capturing device | |
| JP2939652B2 (en) | Video transfer device and electronic camera | |
| JPH0556316A (en) | Image pickup device | |
| JPS6095429A (en) | Photographing device | |
| JPS60135734U (en) | camera | |
| JPS6346866A (en) | Information recorder | |
| JPS6298978A (en) | Driving method and driving circuit for solid-state image pickup element | |
| JPH11266423A (en) | Method and device for picture recording | |
| JPS6170868A (en) | Electronic camera |