JPH01154675A - Image pickup device - Google Patents

Image pickup device

Info

Publication number
JPH01154675A
JPH01154675A JP62314625A JP31462587A JPH01154675A JP H01154675 A JPH01154675 A JP H01154675A JP 62314625 A JP62314625 A JP 62314625A JP 31462587 A JP31462587 A JP 31462587A JP H01154675 A JPH01154675 A JP H01154675A
Authority
JP
Japan
Prior art keywords
power source
battery
cooling device
power
cooling
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
Application number
JP62314625A
Other languages
Japanese (ja)
Inventor
Hiroaki Sugiura
博明 杉浦
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.)
Mitsubishi Electric Corp
Original Assignee
Mitsubishi Electric Corp
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 Mitsubishi Electric Corp filed Critical Mitsubishi Electric Corp
Priority to JP62314625A priority Critical patent/JPH01154675A/en
Publication of JPH01154675A publication Critical patent/JPH01154675A/en
Pending legal-status Critical Current

Links

Abstract

PURPOSE:To minimize the waste of an electric power in a cooling device by stopping or reducing the cooling action of the cooling system to cool an image pickup element when a power source is a battery. CONSTITUTION:An image pickup element 2 image-picks up an object through a lens 1 and the output is outputted through a signal processing circuit 4. The image pickup element 2 is cooled by a cooling system 3. An image pickup device main body 10 is operated by a power source circuit 11 and any of a battery 12, an AC adapter 13 or an automobile battery code 14 is connected to a power source circuit 10. When the power source connected to the power source circuit 11 is a battery 11, a power source discriminating circuit 20 discriminates this, does not operate a power source 5a for a cooling system or reduces a supply capability and stops or reduces the power supply to the cooling system 3.

Description

【発明の詳細な説明】 [産業上の利用分野] この発明は、冷却機能を備えた撮像装置の改良に関する
ものである。
DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an improvement in an imaging device equipped with a cooling function.

[従来の技術] 第2図はたとえば実開昭59−91757号公報に示さ
れた従来の撮像装置を示す図である0図において、(1
)はレンズ、(2)はレンズ(1)を通して被写体を4
M像する撮像素子、(3)は撮像素子(2)に付設され
た冷却装置、(4)は撮像素子(2)の出力である映像
信号を処理する信号処理回路、(5)は冷却装! (3
)を作動させるための冷却装置用電源、(6)は信号処
理回路(0の出力である映像信号の出力端子、(11)
は撮像装置本体(10)を動作させるための電源回路で
ある。(12)は電池、(!3)は商用交流電源を直流
電源に変換するいわゆるACアダプタ、(14)は自動
車からの電力の供給を受けるためのいわゆる自動車バッ
テリーフードで、電源回路(If)にはこれらのうちの
いずれかの電源が接続できるようになっている。
[Prior Art] FIG.
) is the lens, (2) is the subject through the lens (1).
(3) is a cooling device attached to the image sensor (2); (4) is a signal processing circuit that processes the video signal output from the image sensor (2); (5) is a cooling device. ! (3
), (6) is the output terminal for the video signal which is the output of the signal processing circuit (0), (11)
is a power supply circuit for operating the imaging device main body (10). (12) is a battery, (!3) is a so-called AC adapter that converts commercial AC power into DC power, and (14) is a so-called car battery hood that receives power from the car, and is connected to the power supply circuit (If). can be connected to one of these power supplies.

上記装置において、撮像素子(2)の各画素はホトダイ
オードで構成されているが、これらのホトダイオードの
暗電流は、温度の上昇とともに増加する。そして、この
暗電流の大きさは、各画素ごとにばらついているので、
その撮像画面は固定ノイズによりザラザラとした荒れた
画像となる。撮像素子(2)の温度が上昇した場合には
、この現象はより顕著となる。
In the above device, each pixel of the image sensor (2) is composed of a photodiode, and the dark current of these photodiodes increases as the temperature rises. Since the magnitude of this dark current varies from pixel to pixel,
The captured image becomes a rough image due to fixed noise. This phenomenon becomes more noticeable when the temperature of the image sensor (2) increases.

そこで、この固定ノイズを抑制するために、冷却装置(
3)を撮像素子(2)に付設し、撮像素子(2)の温度
が高いとき等に、冷却装置(3)によって撮像素子(2
)を冷却するようにしている。冷却装置(3)は、たと
えばペルチェ素子からなり、冷却装置用電源(5)から
電流を供給することによって、撮像素子(2)を冷却す
る。
Therefore, in order to suppress this fixed noise, a cooling device (
3) is attached to the image sensor (2), and when the temperature of the image sensor (2) is high, the cooling device (3) cools the image sensor (2).
) is being cooled down. The cooling device (3) is made of, for example, a Peltier device, and cools the image sensor (2) by supplying current from a cooling device power source (5).

[発明が解決しようとする問題点] 従来の撮像装置は以にのように構成されているので、電
源として電池(12)を用いる場合にも冷却装置(3)
が作動し、電力を多く消費するという問題点があった。
[Problems to be Solved by the Invention] Since the conventional imaging device is configured as shown below, even when using the battery (12) as a power source, the cooling device (3)
There was a problem in that it activated and consumed a lot of electricity.

これは、特にビデオムービー等を電池で動作させる場合
に顕著な問題となっていた。
This has become a significant problem, especially when video movies and the like are operated on batteries.

この発明は上記従来の問題点を解決するためになされた
もので、冷却装置による消費電力の少ない撮像装置を提
供することを[1的としている。
This invention has been made to solve the above-mentioned conventional problems, and one object thereof is to provide an imaging device that consumes less power due to a cooling device.

[問題点を解決するための手段] この発明は、上記問題点を解決するために、撮像素子と
、この撮像素子を冷却する冷却装置と、電源の種類を判
別して電源が電池である場合に上記冷却装置の冷却作用
を停止もしくは低下させる電源判別回路とを設けたこと
を特徴とする。
[Means for Solving the Problems] In order to solve the above-mentioned problems, the present invention provides an image sensor, a cooling device for cooling the image sensor, and a system that determines the type of power source and provides a system in which the power source is a battery. The cooling device is characterized in that the cooling device is further provided with a power source determination circuit that stops or reduces the cooling effect of the cooling device.

[作用] この発明においては、電源が電池である場合に冷却装置
の冷却作用が停止するか、もしくは低下するので、電池
駆動の場合の冷却装置作動用の電力消費が抑制される。
[Function] In the present invention, when the power source is a battery, the cooling effect of the cooling device is stopped or reduced, so power consumption for operating the cooling device in the case of battery drive is suppressed.

そして、電池駆動の場合には、撮影時間も短いのが普通
であるから、撮像素子の周辺の温度上昇も少なく、冷却
装置の冷却能力が小さいことによる弊害は生じない。
In the case of battery drive, since the imaging time is usually short, the temperature rise around the image sensor is also small, and there are no adverse effects caused by the small cooling capacity of the cooling device.

[実施例] 以下、この発明の実施例を図面にしたがって説明する。[Example] Embodiments of the present invention will be described below with reference to the drawings.

第1″図はこの発明による撮像装置の実施例の構成を示
す図である0図において、(1)はレンズ、(2)はレ
ンズ(1)を通して被写体を撮像する撮像素子、(3)
は撮像素子(2)に付設された冷却装置、(0は撮像素
子(2)の出力である映像信号を処理する信号処理回路
、(5a)は冷却装置(3)を作動させるための冷却装
置用電源、(6)は信号処理回路(4)の出力である映
像信号の出力端子、(11)は撮像装置本体(10)を
動作させるための電源回路、(12)は電池、 (13
)は商用交流電源を直流電源に変換するいわゆるACア
ダプタ、 (14)は自動車からの電力の供給を受ける
ためのいわゆる自動車バッテリーコードで、電源回路(
11)にはこれらのうちのいずれかの電源が接続できる
ようになっている。以りの構成は第2図のものと同様で
ある。
FIG. 1'' is a diagram showing the configuration of an embodiment of the imaging device according to the present invention. In FIG.
is a cooling device attached to the image sensor (2), (0 is a signal processing circuit that processes the video signal output from the image sensor (2), and (5a) is a cooling device for operating the cooling device (3). (6) is an output terminal for the video signal which is the output of the signal processing circuit (4), (11) is a power supply circuit for operating the imaging device main body (10), (12) is a battery, (13)
) is a so-called AC adapter that converts commercial AC power to DC power, (14) is a so-called car battery cord for receiving power from a car, and the power supply circuit (
11) can be connected to any one of these power sources. The rest of the configuration is the same as that shown in FIG.

この実施例では、さらに、電源回路(11)に接続され
る電源が電池であるか否かを判別する電源判別回路(2
0)が設けられている。そして、この電源判別回路(2
0)の出力は、冷却装置用電源(5d)の電源制御端子
(21)に供給されるようになっている。
This embodiment further includes a power source determination circuit (2) that determines whether or not the power source connected to the power source circuit (11) is a battery.
0) is provided. Then, this power supply discrimination circuit (2
The output of 0) is supplied to the power control terminal (21) of the cooling device power supply (5d).

上記装置において、電源回路(11)に接続される電源
がACアダプタ(13)または自動車バッテリーコード
(14)である場合には、電源判別回路(20)は電源
制御端子(21)に制御信号を与えず、冷却装置用電源
(5a)は通常の動作をして冷却装置(3)を作動させ
、撮像素子(2)の冷却が行なわれる。これによって、
固定ノイズが低減され、映像信号出力端子(6)からの
映像信号中の固定ノイズの比率が減少し、画像の荒れが
改善される。
In the above device, when the power source connected to the power supply circuit (11) is the AC adapter (13) or the automobile battery cord (14), the power source discrimination circuit (20) sends a control signal to the power source control terminal (21). The cooling device power supply (5a) operates normally to operate the cooling device (3), thereby cooling the image sensor (2). by this,
Fixed noise is reduced, the ratio of fixed noise in the video signal from the video signal output terminal (6) is reduced, and image roughness is improved.

一方、電源回路(11)に接続される電源が電池(12
)である場合には、電源判別回路(20)はこれを判別
して電源制御端子(21)に制御信号を与え、冷却装置
用電源(5a)を不動作にして冷却装置(3)への電力
の供給を停止させる。このため、撮像素子(2)の冷却
は行なわれない、しかるに、撮像装置を電池(12)で
駆動する場合は、一般に撮影時間も短く、撮像素子(2
)の温度上昇が少ないので、冷却作用を停止しても固定
ノイズによる影響はほとんど生じない。
On the other hand, the power source connected to the power supply circuit (11) is the battery (12
), the power supply discrimination circuit (20) discriminates this and gives a control signal to the power supply control terminal (21), disabling the cooling device power supply (5a) and disabling the cooling device (3). Stop the power supply. Therefore, the imaging device (2) is not cooled. However, when the imaging device is driven by a battery (12), the imaging time is generally short, and the imaging device (2) is not cooled.
), the fixed noise has almost no effect even if the cooling action is stopped.

なお、上記実施例では、電源回路(11)に接続される
電源が電池(12)である場合に、冷却装置(3)への
電力の供給を停止するようにしたが、供給電力を低減し
て冷却装置(3)の冷却作用を低下させるようにしても
よい、たとえば、温度センサ等を設け、電池(12)で
動作している場合には、上記温度センサからの情報によ
って、他の電源の場合に比べて冷却装置(3)への供給
電力を低減するようにすることが可能である。
In addition, in the above embodiment, when the power source connected to the power supply circuit (11) is the battery (12), the supply of power to the cooling device (3) is stopped, but it is possible to reduce the power supply. For example, if a temperature sensor or the like is provided and the cooling device (3) is operated by a battery (12), information from the temperature sensor may be used to reduce the cooling effect of the cooling device (3). It is possible to reduce the power supplied to the cooling device (3) compared to the case shown in FIG.

[発明の効果] 以りのように、この発明によれば、電源判別回路を設け
、撮影時間の短い電池駆動の場合には、冷却装置の冷却
作用を停止にもしくは低下させるようにしたので、冷却
装置における電力の無駄が少なくなり、消費電力を低減
することが可能となる。
[Effects of the Invention] As described above, according to the present invention, a power source determination circuit is provided to stop or reduce the cooling effect of the cooling device when the shooting time is short and battery-powered. There is less waste of power in the cooling device, and it is possible to reduce power consumption.

この発明は、特にビデオムービー等を電池で作動させる
場合において効果が大きい。
This invention is particularly effective when video movies and the like are operated on batteries.

【図面の簡単な説明】[Brief explanation of the drawing]

第1図はこの発明による撮像装置の実施例を示す構成図
、第2図は従来の撮像装置を示す構成図である。 (2)・・・撮像素子、(3)・・・冷却装置、(12
)・・・電池、(20)・・・電源判別回路。 なお、図中、同一符号は同一または相当部分を示す・ 第1凶
FIG. 1 is a configuration diagram showing an embodiment of an imaging device according to the present invention, and FIG. 2 is a configuration diagram showing a conventional imaging device. (2)...Image sensor, (3)...Cooling device, (12
)...Battery, (20)...Power source determination circuit. In addition, in the figures, the same symbols indicate the same or equivalent parts.

Claims (2)

【特許請求の範囲】[Claims] (1)撮像素子と、この撮像素子を冷却する冷却装置と
、電源の種類を判別して電源が電池である場合に上記冷
却装置の冷却作用を停止もしくは低下させる電源判別回
路とを設けたことを特徴とする撮像装置。
(1) An image sensor, a cooling device that cools the image sensor, and a power source determination circuit that determines the type of power source and stops or reduces the cooling effect of the cooling device when the power source is a battery. An imaging device characterized by:
(2)冷却装置がペルチエ素子である特許請求の範囲第
1項記載の撮像装置。
(2) The imaging device according to claim 1, wherein the cooling device is a Peltier device.
JP62314625A 1987-12-10 1987-12-10 Image pickup device Pending JPH01154675A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP62314625A JPH01154675A (en) 1987-12-10 1987-12-10 Image pickup device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP62314625A JPH01154675A (en) 1987-12-10 1987-12-10 Image pickup device

Publications (1)

Publication Number Publication Date
JPH01154675A true JPH01154675A (en) 1989-06-16

Family

ID=18055562

Family Applications (1)

Application Number Title Priority Date Filing Date
JP62314625A Pending JPH01154675A (en) 1987-12-10 1987-12-10 Image pickup device

Country Status (1)

Country Link
JP (1) JPH01154675A (en)

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6189778A (en) * 1984-09-28 1986-05-07 ア−ルシ−エ− コ−ポレ−ション Solid-state image pickup appliance type video camera
JPS62186679A (en) * 1986-02-13 1987-08-15 Canon Inc Image pickup device

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6189778A (en) * 1984-09-28 1986-05-07 ア−ルシ−エ− コ−ポレ−ション Solid-state image pickup appliance type video camera
JPS62186679A (en) * 1986-02-13 1987-08-15 Canon Inc Image pickup device

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