JPH0980573A - Camera equipped with image blurring correcting function - Google Patents
Camera equipped with image blurring correcting functionInfo
- Publication number
- JPH0980573A JPH0980573A JP23665695A JP23665695A JPH0980573A JP H0980573 A JPH0980573 A JP H0980573A JP 23665695 A JP23665695 A JP 23665695A JP 23665695 A JP23665695 A JP 23665695A JP H0980573 A JPH0980573 A JP H0980573A
- Authority
- JP
- Japan
- Prior art keywords
- power supply
- camera
- optical system
- shake
- supply 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
Landscapes
- Exposure Control For Cameras (AREA)
- Adjustment Of Camera Lenses (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】この発明は、カメラの振れを
検出して像振れを補正する像振れ補正機能を備えた像振
れ補正機能付きカメラに関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a camera with an image blur correction function having an image blur correction function for detecting camera shake and correcting the image blur.
【０００２】[0002]
【従来の技術】従来より、この種の像振れ補正機能付き
カメラとして、特開平４−１１３３３８号公報に開示さ
れているような像振れ防止機能付きカメラが提案されて
いる。この像振れ防止機能付きカメラでは、ＤＣモータ
をＰＷＭ（パルス幅変調）制御することによって、像振
れの補正を行うようにしている。すなわち、ＤＣモータ
への印加電圧を一定とし、この印加電圧をカメラの振れ
から計算した像振れ補正量に応じたデューティ比でオン
／オフすることにより、平均時間当たりの電圧の供給量
（供給電力）を調整するようにしている。この場合、Ｐ
ＷＭのデューティ比は、像振れ補正量に応じ、０〜１０
０％とされる。2. Description of the Related Art Conventionally, as this type of camera with an image blur correction function, a camera with an image blur prevention function as disclosed in Japanese Patent Laid-Open No. 4-113338 has been proposed. In this camera with image blur prevention function, image blur is corrected by PWM (pulse width modulation) control of the DC motor. That is, the voltage applied to the DC motor is kept constant, and the applied voltage is turned on / off at a duty ratio according to the image shake correction amount calculated from the shake of the camera, so that the voltage supply amount (supply power) per average time is increased. ) Is adjusted. In this case, P
The WM duty ratio is 0 to 10 depending on the image blur correction amount.
It is set to 0%.
【０００３】ここで、重負荷状態となって、像振れ補正
中にカメラの電池電圧が降下すると、十二分な電力供給
が行われず、異常な動作シーケンスに入る虞れがある。
このため、上述した特開平４−１１３３３８号公報で
は、カメラの電池電圧を監視するものとし、カメラの電
池電圧が所定値を下回った場合、ＰＷＭのデューティ比
の上限値に例えば５０％というリミットを設けるように
している。これにより、例えば、ＰＷＭのデューティ比
が１００％と計算されていても、実際のＰＷＭのデュー
ティ比は５０％とされ、ＤＣモータへの供給電力が５０
％カットされることから、カメラの電池電圧の異常な低
下を防止することができる。If the battery voltage of the camera drops during image blur correction in a heavy load state, sufficient power supply may not be performed and an abnormal operation sequence may occur.
Therefore, in the above-mentioned Japanese Patent Laid-Open No. 4-113338, the battery voltage of the camera is monitored, and when the battery voltage of the camera falls below a predetermined value, the upper limit value of the PWM duty ratio is limited to, for example, 50%. I am trying to provide it. Thus, for example, even if the PWM duty ratio is calculated to be 100%, the actual PWM duty ratio is set to 50%, and the power supplied to the DC motor is 50%.
Since it is cut by%, it is possible to prevent an abnormal decrease in the battery voltage of the camera.
【０００４】[0004]
【発明が解決しようとする課題】しかしながら、このよ
うな従来の像振れ補正機能付きカメラによると、カメラ
の電池電圧が所定値を下回った場合、ＰＷＭのデューテ
ィ比の上限値に一律にリミットを設けるようにしている
ため、像振れ補正量の目標値と実際値との間に大きな開
きが生じるという問題があった。すなわち、カメラの電
池電圧が所定値を下回ると、ＰＷＭのデューティ比が１
００％と計算されていても８０％と計算されていても、
実際のＰＷＭのデューティ比は一律に５０％とされる。
この場合、負荷状態によっては、実際のＰＷＭのデュー
ティ比を７０％としても、所定値を下回るカメラの電池
電圧の低下を防止することができることもあり得る。し
かし、従来の像振れ補正機能付きカメラでは、実際のＰ
ＷＭのデューティ比は一律に５０％とされる。このた
め、計算されているＰＷＭのデューティ比が１００％で
あれば、１００％−７０％＝３０％の開きでよいところ
が、１００％−５０％＝５０％の開きとなる。また、計
算されているＰＷＭのデューティ比が８０％であれば、
８０％−７０％＝１０％の開きでよいところが、８０％
−５０％＝３０％の開きとなる。However, according to such a conventional camera with an image blur correction function, when the battery voltage of the camera falls below a predetermined value, the upper limit value of the PWM duty ratio is uniformly limited. Therefore, there is a problem that a large difference occurs between the target value and the actual value of the image blur correction amount. That is, when the battery voltage of the camera falls below a predetermined value, the PWM duty ratio becomes 1
Whether it's calculated as 00% or 80%,
The actual duty ratio of PWM is uniformly set to 50%.
In this case, depending on the load state, it may be possible to prevent the battery voltage of the camera from falling below a predetermined value even if the actual PWM duty ratio is set to 70%. However, in the conventional camera with the image blur correction function, the actual P
The duty ratio of WM is uniformly set to 50%. Therefore, when the calculated PWM duty ratio is 100%, the difference of 100% -70% = 30% is sufficient, but the difference of 100% -50% = 50% is obtained. If the calculated PWM duty ratio is 80%,
Where 80% -70% = 10% difference is good, 80%
The difference is −50% = 30%.
【０００５】本発明はこのような課題を解決するために
なされたもので、その目的とするところは、像振れ補正
量の目標値と実際値との間に大きな開きを生じさせるこ
となく、像振れ補正中のカメラの電池電圧の異常な低下
を防止することの可能な像振れ補正機能付きカメラを提
供することにある。The present invention has been made in order to solve such a problem, and an object of the present invention is to prevent the occurrence of a large difference between the target value and the actual value of the image blur correction amount, and An object of the present invention is to provide a camera with an image blur correction function that can prevent an abnormal drop in the battery voltage of the camera during blur correction.
【０００６】[0006]
【課題を解決するための手段】このような目的を達成す
るために、第１発明（請求項１に係る発明）は、カメラ
の振れを検出する振れ検出手段（６，７）と、像振れを
補正するための補正光学系（１６）と、この補正光学系
（１６）を駆動する駆動手段（１１，１２）と、補正光
学系（１６）の位置を検出する位置検出手段（１８，１
９）と、振れ検出手段（６，７）からの検出結果と位置
検出手段（１８，１９）からの検出結果とに基づきカメ
ラの振れを打ち消すような補正光学系（１６）の移動量
を算出する移動量算出手段（２−１，２−２）と、この
移動量算出手段（２−１，２−２）により算出された移
動量に応じ駆動手段（１１，１２）を介して補正光学系
（１６）を駆動するドライバ手段（８，９）とを備えた
像振れ補正機能付きカメラにおいて、カメラの電源電圧
（ＶB ）を監視する電源電圧監視手段（２−３）と、こ
の電源電圧監視手段（２−３）が補正光学系（１６）の
駆動中に所定値（Ｖ１）を下回る電源電圧（ＶB ）の低
下を検出した場合、駆動手段（１１，１２）への供給電
力を電源電圧（ＶB ）が所定値（Ｖ１）を下回ることの
ない最大限の電力値に制限する供給電力制限手段（２−
４）とを設けたものである。この発明によれば、補正光
学系（１６）の駆動中にカメラの電源電圧（ＶB ）が所
定値（Ｖ１）を下回ると、駆動手段（１１，１２）への
供給電力が電源電圧（ＶB ）が所定値（Ｖ１）を下回る
ことのない最大限の電力値に制限される。In order to achieve such an object, a first invention (an invention according to claim 1) is a shake detecting means (6, 7) for detecting a shake of a camera, and an image shake. A correction optical system (16) for correcting the correction optical system, drive means (11, 12) for driving the correction optical system (16), and position detection means (18, 1) for detecting the position of the correction optical system (16).
9), the movement amount of the correction optical system (16) that cancels the camera shake based on the detection result from the shake detection means (6, 7) and the detection result from the position detection means (18, 19). The moving amount calculating means (2-1, 2-2) for performing the correction optics via the driving means (11, 12) according to the moving amount calculated by the moving amount calculating means (2-1, 2-2). In a camera with an image blur correction function provided with driver means (8, 9) for driving a system (16), a power supply voltage monitoring means (2-3) for monitoring the power supply voltage (VB) of the camera, and this power supply voltage When the monitoring means (2-3) detects a decrease in the power supply voltage (VB) below a predetermined value (V1) during driving of the correction optical system (16), the power supplied to the driving means (11, 12) is supplied as power. Maximum power value that voltage (VB) does not fall below a prescribed value (V1) Limiting supplying power limiting means (2-
4) and are provided. According to the present invention, when the power supply voltage (VB) of the camera falls below the predetermined value (V1) during the driving of the correction optical system (16), the power supplied to the driving means (11, 12) is the power supply voltage (VB). Is limited to the maximum power value that does not fall below a predetermined value (V1).
【０００７】第２発明（請求項２に係る発明）は、カメ
ラの振れを検出する振れ検出手段（６，７）と、像振れ
を補正するための補正光学系（１６）と、印加されるア
ナログ電圧（Ｖout ）の値に応じた駆動量で補正光学系
（１６）を駆動する駆動手段（１１，１２）と、補正光
学系（１６）の位置を検出する位置検出手段（１８，１
９）と、振れ検出手段（６，７）からの検出結果と位置
検出手段（１８，１９）からの検出結果とに基づきカメ
ラの振れを打ち消すような補正光学系（１６）の移動量
を算出する移動量算出手段（２−１，２−２）と、この
移動量算出手段（２−１，２−２）により算出された移
動量に応じ駆動手段（１１，１２）を介して補正光学系
（１６）を駆動するドライバ手段（８，９）とを備えた
像振れ補正機能付きカメラにおいて、カメラの電源電圧
（ＶB ）を監視する電源電圧監視手段（２−３）と、こ
の電源電圧監視手段（２−３）が補正光学系（１６）の
駆動中に所定値（Ｖ１）を下回る電源電圧（ＶB ）の低
下を検出した場合、駆動手段（１１，１２）への印加電
圧（Ｖout ）を電源電圧（ＶB ）が所定値（Ｖ１）を下
回ることのない最大限の電圧値に制限する印加電圧制限
手段（２−４）とを設けたものである。この発明によれ
ば、補正光学系（１６）の駆動中にカメラの電源電圧
（ＶB ）が所定値（Ｖ１）を下回ると、駆動手段（１
１，１２）への印加電圧（Ｖout ）が電源電圧（ＶB ）
が所定値（Ｖ１）を下回ることのない最大限の電圧値に
制限される。The second invention (the invention according to claim 2) is applied with a shake detecting means (6, 7) for detecting the shake of the camera, and a correction optical system (16) for correcting the image shake. Driving means (11, 12) for driving the correction optical system (16) with a drive amount according to the value of the analog voltage (Vout), and position detection means (18, 1) for detecting the position of the correction optical system (16).
9), the movement amount of the correction optical system (16) that cancels the camera shake based on the detection result from the shake detection means (6, 7) and the detection result from the position detection means (18, 19). The moving amount calculating means (2-1, 2-2) for performing the correction optics via the driving means (11, 12) according to the moving amount calculated by the moving amount calculating means (2-1, 2-2). In a camera with an image blur correction function provided with driver means (8, 9) for driving a system (16), a power supply voltage monitoring means (2-3) for monitoring the power supply voltage (VB) of the camera, and this power supply voltage When the monitoring means (2-3) detects a decrease in the power supply voltage (VB) below a predetermined value (V1) during driving of the correction optical system (16), the applied voltage (Vout) to the driving means (11, 12). ) Is the maximum that the power supply voltage (VB) does not fall below the specified value (V1) And an applied voltage limiting means (2-4) for limiting the voltage value of the above. According to the present invention, when the power source voltage (VB) of the camera falls below the predetermined value (V1) during the driving of the correction optical system (16), the driving means (1
1, 12) applied voltage (Vout) is power supply voltage (VB)
Is limited to a maximum voltage value that does not fall below a predetermined value (V1).
【０００８】第３発明（請求項３に係る発明）は、カメ
ラの水平方向の振れを検出する第１の振れ検出手段
（６）と、カメラの鉛直方向の振れを検出する第２の振
れ検出手段（７）と、像振れを補正するための補正光学
系（１６）と、この補正光学系（１６）を水平方向に駆
動する第１の駆動手段（１１）と、補正光学系（１６）
を鉛直方向に駆動する第２の駆動手段（１２）と、補正
光学系（１６）の水平方向の位置を検出する第１の位置
検出手段（１８）と、補正光学系（１６）の鉛直方向の
位置を検出する第２の位置検出手段（１９）と、第１の
振れ検出手段（６）からの検出結果と第１の位置検出手
段（１８）からの検出結果とに基づきカメラの水平方向
の振れを打ち消すような補正光学系（１６）の移動量を
算出する水平方向移動量算出手段（２−１）と、第２の
振れ検出手段（７）からの検出結果と第２の位置検出手
段（１９）からの検出結果とに基づきカメラの鉛直方向
の振れを打ち消すような補正光学系（１６）の移動量を
算出する鉛直方向移動量算出手段（２−２）と、水平方
向移動量算出手段（２ー１）により算出された移動量に
応じ第１の駆動手段（１１）を介して補正光学系（１
６）を水平方向に駆動する第１のドライバ手段（８）
と、鉛直方向移動量算出手段（２−２）により算出され
た移動量に応じ第２の駆動手段（１２）を介して補正光
学系（１６）を鉛直方向に駆動する第２のドライバ手段
（９）とを備えた像振れ補正機能付きカメラにおいて、
カメラの電源電圧（ＶB ）を監視する電源電圧監視手段
（２−３）と、この電源電圧監視手段（２−３）が補正
光学系（１６）の駆動中に所定値（Ｖ１）を下回る電源
電圧（ＶB ）の低下を検出した場合、第１の駆動手段
（１１）および第２の駆動手段（１２）への供給電力を
電源電圧（ＶB ）が所定値（Ｖ１）を下回ることのない
最大限の電力値に制限する供給電力制限手段（２−４）
とを設けたものである。この発明によれば、補正光学系
（１６）の駆動中にカメラの電源電圧（ＶB ）が所定値
（Ｖ１）を下回ると、第１の駆動手段（１１）および第
２の駆動手段（１２）への供給電力が電源電圧（ＶB ）
が所定値（Ｖ１）を下回ることのない最大限の電力値に
制限される。A third invention (an invention according to claim 3) is a first shake detecting means (6) for detecting a shake in the horizontal direction of the camera, and a second shake detection for detecting a shake in the vertical direction of the camera. Means (7), correction optical system (16) for correcting image blur, first driving means (11) for horizontally driving the correction optical system (16), and correction optical system (16)
Driving means (12) for driving the optical axis in the vertical direction, first position detecting means (18) for detecting the horizontal position of the correction optical system (16), and vertical direction of the correction optical system (16). The second position detecting means (19) for detecting the position of the camera, the horizontal direction of the camera based on the detection result from the first shake detecting means (6) and the detection result from the first position detecting means (18). Horizontal movement amount calculating means (2-1) for calculating the movement amount of the correction optical system (16) that cancels the shake of the image, the detection result from the second shake detecting means (7), and the second position detection. Vertical movement amount calculation means (2-2) for calculating the movement amount of the correction optical system (16) that cancels the vertical shake of the camera based on the detection result from the means (19), and the horizontal movement amount. The first driving hand according to the movement amount calculated by the calculation means (2-1) (11) through a correction optical system (1
First driver means (8) for driving 6) in the horizontal direction
And second driver means for driving the correction optical system (16) in the vertical direction via the second drive means (12) according to the movement amount calculated by the vertical movement amount calculation means (2-2). 9) In a camera with an image blur correction function equipped with
A power supply voltage monitoring means (2-3) for monitoring the power supply voltage (VB) of the camera, and a power supply for which the power supply voltage monitoring means (2-3) is below a predetermined value (V1) while the correction optical system (16) is being driven. When the decrease of the voltage (VB) is detected, the power supplied to the first drive means (11) and the second drive means (12) is the maximum value at which the power supply voltage (VB) does not fall below a predetermined value (V1). Supply power limiting means (2-4) for limiting the power value to the limit
Are provided. According to the present invention, when the power supply voltage (VB) of the camera falls below the predetermined value (V1) during the driving of the correction optical system (16), the first driving means (11) and the second driving means (12). Power supply to the power supply voltage (VB)
Is limited to the maximum power value that does not fall below a predetermined value (V1).
【０００９】第４発明（請求項４に係る発明）は、カメ
ラの水平方向の振れを検出する第１の振れ検出手段
（６）と、カメラの鉛直方向の振れを検出する第２の振
れ検出手段（７）と、像振れを補正するための補正光学
系（１６）と、印加されるアナログ電圧（Ｖout ）の値
に応じた駆動量で補正光学系（１６）を水平方向に駆動
する第１の駆動手段（１１）と、印加されるアナログ電
圧（Ｖout ）の値に応じた駆動量で補正光学系（１６）
を鉛直方向に駆動する第２の駆動手段（１２）と、補正
光学系（１６）の水平方向の位置を検出する第１の位置
検出手段（１８）と、補正光学系（１６）の鉛直方向の
位置を検出する第２の位置検出手段（１９）と、第１の
振れ検出手段（６）からの検出結果と第１の位置検出手
段（１８）からの検出結果とに基づきカメラの水平方向
の振れを打ち消すような補正光学系（１６）の移動量を
算出する水平方向移動量算出手段（２−１）と、第２の
振れ検出手段（７）からの検出結果と第２の位置検出手
段（１９）からの検出結果とに基づきカメラの鉛直方向
の振れを打ち消すような補正光学系（１６）の移動量を
算出する鉛直方向移動量算出手段（２−２）と、水平方
向移動量算出手段（２ー１）により算出された移動量に
応じ第１の駆動手段（１１）を介して補正光学系（１
６）を水平方向に駆動する第１のドライバ手段（８）
と、鉛直方向移動量算出手段（２−２）により算出され
た移動量に応じ第２の駆動手段（１２）を介して補正光
学系（１６）を鉛直方向に駆動する第２のドライバ手段
（９）とを備えた像振れ補正機能付きカメラにおいて、
カメラの電源電圧（ＶB ）を監視する電源電圧監視手段
（２−３）と、この電源電圧監視手段（２−３）が補正
光学系（６）の駆動中に所定値（Ｖ１）を下回る電源電
圧（ＶB ）の低下を検出した場合、第１の駆動手段（１
１）および第２の駆動手段（１２）への印加電圧（Ｖou
t）を電源電圧（ＶB ）が所定値（Ｖ１）を下回ること
のない最大限の電圧値に制限する印加電圧制限手段（２
−４）とを設けたものである。この発明によれば、補正
光学系（１６）の駆動中にカメラの電源電圧（ＶB ）が
所定値（Ｖ１）を下回ると、第１の駆動手段（１１）お
よび第２の駆動手段（１２）への印加電圧（Ｖout ）が
電源電圧（ＶB ）が所定値（Ｖ１）を下回ることのない
最大限の電圧値に制限される。A fourth invention (an invention according to claim 4) is a first shake detecting means (6) for detecting a shake in the horizontal direction of the camera, and a second shake detection for detecting a shake in the vertical direction of the camera. A means (7), a correction optical system (16) for correcting image blur, and a horizontal drive of the correction optical system (16) with a drive amount corresponding to the value of the applied analog voltage (Vout). No. 1 driving means (11) and a correction optical system (16) with a driving amount according to the value of the applied analog voltage (Vout)
Driving means (12) for driving the optical axis in the vertical direction, first position detecting means (18) for detecting the horizontal position of the correction optical system (16), and vertical direction of the correction optical system (16). The second position detecting means (19) for detecting the position of the camera, the horizontal direction of the camera based on the detection result from the first shake detecting means (6) and the detection result from the first position detecting means (18). Horizontal movement amount calculating means (2-1) for calculating the movement amount of the correction optical system (16) that cancels the shake of the image, the detection result from the second shake detecting means (7), and the second position detection. Vertical movement amount calculation means (2-2) for calculating the movement amount of the correction optical system (16) that cancels the vertical shake of the camera based on the detection result from the means (19), and the horizontal movement amount. The first driving hand according to the movement amount calculated by the calculation means (2-1) (11) through a correction optical system (1
First driver means (8) for driving 6) in the horizontal direction
And second driver means for driving the correction optical system (16) in the vertical direction via the second drive means (12) according to the movement amount calculated by the vertical movement amount calculation means (2-2). 9) In a camera with an image blur correction function equipped with
A power supply voltage monitoring means (2-3) for monitoring the power supply voltage (VB) of the camera, and a power supply for which the power supply voltage monitoring means (2-3) falls below a predetermined value (V1) while the correction optical system (6) is being driven. When the decrease of the voltage (VB) is detected, the first driving means (1
1) and the voltage applied to the second driving means (12) (Vou
Applied voltage limiting means (2) for limiting t) to the maximum voltage value at which the power supply voltage (VB) does not fall below a predetermined value (V1).
-4) and are provided. According to the present invention, when the power supply voltage (VB) of the camera falls below the predetermined value (V1) during the driving of the correction optical system (16), the first driving means (11) and the second driving means (12). The applied voltage (Vout) to the power supply voltage (VB) is limited to the maximum voltage value so that the power supply voltage (VB) does not fall below a predetermined value (V1).
【００１０】第５発明（請求項５に係る発明）は、第３
発明において、電源電圧監視手段（２−３）が補正光学
系（１６）の駆動中に所定値（Ｖ１）を下回る電源電圧
（ＶB ）の低下を検出した場合、第１の駆動手段（１
１）および第２の駆動手段（１２）への供給電力を、第
１の振れ検出手段（６）および第２の振れ検出手段
（７）での検出結果に応じて同一比率で減少させ、電源
電圧（ＶB ）が所定値（Ｖ１）を下回ることのない最大
限の電力値に制限するようにしたものである。第６発明
（請求項６に係る発明）は、第４発明において、電源電
圧監視手段（２−３）が補正光学系（１６）の駆動中に
所定値（Ｖ１）を下回る電源電圧（ＶB ）の低下を検出
した場合、第１の駆動手段（１１）および第２の駆動手
段（１２）への印加電圧を、第１の振れ検出手段（６）
および第２の振れ検出手段（７）での検出結果に応じて
同一比率で減少させ、電源電圧（ＶB ）が所定値（Ｖ
１）を下回ることのない最大限の電圧値に制限するよう
にしたものである。第７発明（請求項７に係る発明）
は、第１発明〜第６発明において、電源電圧（ＶB ）の
低下を検出する際の比較値として用いる所定値（Ｖ１）
を不揮発性メモリ（５）に記憶するようにしたものであ
る。The fifth invention (the invention according to claim 5) is the third invention.
In the invention, when the power supply voltage monitoring means (2-3) detects a decrease in the power supply voltage (VB) below a predetermined value (V1) during driving of the correction optical system (16), the first driving means (1
The power supply to the first drive means (12) and the second drive means (12) is reduced at the same ratio according to the detection results of the first shake detection means (6) and the second shake detection means (7), and the power supply is reduced. The voltage (VB) is limited to the maximum electric power value which does not fall below a predetermined value (V1). A sixth invention (an invention according to claim 6) is the power supply voltage (VB) according to the fourth invention, wherein the power supply voltage monitoring means (2-3) is below a predetermined value (V1) while the correction optical system (16) is being driven. When the decrease of the voltage is detected, the applied voltage to the first drive means (11) and the second drive means (12) is changed to the first shake detection means (6).
Also, the power supply voltage (VB) is reduced at the same ratio according to the detection result of the second shake detecting means (7), and the power supply voltage (VB) is reduced to a predetermined value (VB).
The voltage is limited to the maximum voltage value that does not fall below 1). 7th invention (an invention according to claim 7)
Is a predetermined value (V1) used as a comparison value when detecting a decrease in the power supply voltage (VB) in the first invention to the sixth invention.
Is stored in the non-volatile memory (5).
【００１１】[0011]
【発明の実施の形態】以下、本発明を実施の形態に基づ
き詳細に説明する。図１はこの発明の一実施の形態を示
す像振れ補正機能付きカメラの構成を示すブロック図で
ある。同図において、２４は撮影光学系であり、撮影レ
ンズ１４，１５，１６，１７により構成されている。こ
の撮影光学系２４において、撮影レンズ１６は補正光学
系に相当し、像振れ補正用にＸ軸方向（水平方向）、Ｙ
軸方向（鉛直方向）に駆動可能とされている。撮影レン
ズ１７は焦点調節用にＺ軸（光軸）方向に駆動可能とさ
れている。BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, the present invention will be described in detail based on embodiments. FIG. 1 is a block diagram showing the configuration of a camera with an image blur correction function according to an embodiment of the present invention. In the figure, reference numeral 24 denotes a photographing optical system, which is composed of photographing lenses 14, 15, 16, and 17. In this photographing optical system 24, the photographing lens 16 corresponds to a correction optical system, and for image shake correction, the X-axis direction (horizontal direction), Y
It can be driven in the axial direction (vertical direction). The taking lens 17 can be driven in the Z-axis (optical axis) direction for focus adjustment.
【００１２】２はＣＰＵ（中央演算処理装置）であり、
撮影に関する制御、像振れ補正制御等の処理を実行す
る。ＣＰＵ２には、測光回路（ＡＥ回路）３と、測距回
路（ＡＦ回路）４と、不揮発性メモリ（ＥＥＰＲＯＭ）
５と、第１の角速度検出回路６と、第２の角速度検出回
路７と、第１のモータ駆動回路８と、第２のモータ駆動
回路９と、第３のモータ駆動回路１０と、第１のレンズ
位置検出回路１８と、第２のレンズ位置検出回路１９
と、第３のレンズ位置検出回路２０と、メインスイッチ
２１と、半押しスイッチ２２と、全押しスイッチ２３
と、カメラの電源である電池１が接続されている。2 is a CPU (central processing unit),
Processing such as shooting control and image blur correction control is executed. The CPU 2 includes a photometric circuit (AE circuit) 3, a distance measuring circuit (AF circuit) 4, and a non-volatile memory (EEPROM).
5, the first angular velocity detection circuit 6, the second angular velocity detection circuit 7, the first motor drive circuit 8, the second motor drive circuit 9, the third motor drive circuit 10, the first Lens position detection circuit 18 and second lens position detection circuit 19
A third lens position detection circuit 20, a main switch 21, a half-push switch 22, and a full-push switch 23.
Is connected to the battery 1 which is the power source of the camera.
【００１３】ＡＥ回路３は、ＣＰＵ２からの命令で被写
体の輝度を測光し、測光データをＣＰＵ２に出力する。
ＡＦ回路４は、ＣＰＵ２からの命令で被写体までの距離
を測距し、測距データをＣＰＵ２に出力する。ＥＥＰＲ
ＯＭ５は、撮影処理に必要な所定データがあらかじめ書
き込まれており、所定の処理が行われるうえで必要な時
にＣＰＵ２が所定データを読み込むようにするためのも
のである。角速度検出回路６はカメラの振れによって生
じるＸ軸方向の角速度を検出する。角速度検出回路７は
カメラの振れによって生じるＹ軸方向の角速度を検出す
る。The AE circuit 3 measures the brightness of the object according to a command from the CPU 2 and outputs the photometric data to the CPU 2.
The AF circuit 4 measures the distance to the subject according to a command from the CPU 2 and outputs the distance measurement data to the CPU 2. EEPR
The OM 5 is pre-written with predetermined data necessary for the photographing process, and is for the CPU 2 to read the predetermined data when necessary for performing the predetermined process. The angular velocity detection circuit 6 detects the angular velocity in the X-axis direction caused by the shake of the camera. The angular velocity detection circuit 7 detects the angular velocity in the Y-axis direction caused by the shake of the camera.
【００１４】モータ駆動回路８には、撮影レンズ（像振
れ補正レンズ）１６をＸ軸方向に駆動する第１のモータ
１１が、モータ駆動回路９には、像振れ補正レンズ１６
をＹ軸方向に駆動する第２のモータ１２がそれぞれ接続
されている。モータ駆動回路１０には撮影レンズ（フォ
ーカシングレンズ）１７をＺ軸方向に駆動する第３のモ
ータ１３が接続されている。ＣＰＵ２がＡＦ回路４から
のＡＦデータを演算することによってＡＦレンズ１７の
移動量を算出し、その算出した移動量の駆動を行う。The motor drive circuit 8 has a first motor 11 for driving the taking lens (image blur correction lens) 16 in the X-axis direction, and the motor drive circuit 9 has an image blur correction lens 16.
Are connected to the second motors 12 for driving the motors in the Y-axis direction. The motor drive circuit 10 is connected to a third motor 13 that drives a taking lens (focusing lens) 17 in the Z-axis direction. The CPU 2 calculates the amount of movement of the AF lens 17 by calculating the AF data from the AF circuit 4, and drives the calculated amount of movement.
【００１５】レンズ位置検出回路１８は像振れ補正レン
ズ１６のＸ軸方向の位置を読み込む。レンズ位置検出回
路１９は像振れ補正レンズ１６のＹ軸方向の位置を読み
込む。ＣＰＵ２は、角速度検出回路６，７からの出力と
レンズ位置検出回路１８，１９からの出力とから、像振
れ補正レンズ１６の移動量を算出する。モータ駆動回路
８，９は、モータ１１，１２を駆動することで、像振れ
補正レンズ１６をＣＰＵ２で算出された移動量の駆動を
行う。The lens position detection circuit 18 reads the position of the image blur correction lens 16 in the X-axis direction. The lens position detection circuit 19 reads the position of the image blur correction lens 16 in the Y-axis direction. The CPU 2 calculates the movement amount of the image blur correction lens 16 from the outputs from the angular velocity detection circuits 6 and 7 and the outputs from the lens position detection circuits 18 and 19. The motor drive circuits 8 and 9 drive the motors 11 and 12 to drive the image blur correction lens 16 by the movement amount calculated by the CPU 2.
【００１６】レンズ位置検出回路２０はフォーカシング
レンズ１７のＺ軸方向の位置を読み込む。メインスイッ
チ２１は、オンすることによってカメラを撮影可能な状
態にするためのスイッチである。半押しスイッチ２２
は、レリーズボタンの半押しでオンするスイッチで、オ
ンされることによってＣＰＵ２は、ＡＥ回路３を駆動し
測光を行い、ＡＦ回路４を駆動し測距を行い、角速度検
出回路６，７、レンズ位置検出回路１８，１９を駆動し
像振れ補正演算を行う。全押しスイッチ２３は、レリー
ズボタンの全押しでオンするスイッチであり、オンされ
ることによってＣＰＵ２は、露出制御を行うと同時に、
モータ駆動回路８，９を駆動し像振れ補正駆動を行う。The lens position detection circuit 20 reads the position of the focusing lens 17 in the Z-axis direction. The main switch 21 is a switch for turning on the camera so that the camera can take a picture. Half-push switch 22
Is a switch that is turned on by pressing the release button halfway. When turned on, the CPU 2 drives the AE circuit 3 to perform photometry, the AF circuit 4 to perform distance measurement, the angular velocity detection circuits 6 and 7, the lens. The position detection circuits 18 and 19 are driven to perform image blur correction calculation. The full-press switch 23 is a switch that is turned on by full-pressing the release button. By being turned on, the CPU 2 performs exposure control and at the same time,
The motor drive circuits 8 and 9 are driven to perform image blur correction drive.
【００１７】次に、像振れ補正レンズ１６の駆動につい
て説明する。ＣＰＵ２は、角速度検出回路６からの検出
結果とレンズ位置検出回路１８からの検出結果とに基づ
きカメラのＸ軸方向の振れを打ち消すような像振れ補正
レンズ１６の移動量を算出し（ブロック２−１）、その
算出結果に応じた電圧Ｖをモータ駆動回路８へ送る。ま
た、ＣＰＵ２は、角速度検出回路７からの検出結果とレ
ンズ位置検出回路１９からの検出結果とに基づきカメラ
のＹ軸方向の振れを打ち消すような像振れ補正レンズ１
６の移動量を算出し（ブロック２−２）、その算出結果
に応じた電圧をモータ駆動回路９へ送る。Next, driving of the image blur correction lens 16 will be described. The CPU 2 calculates the amount of movement of the image blur correction lens 16 that cancels the blur in the X-axis direction of the camera based on the detection result from the angular velocity detection circuit 6 and the detection result from the lens position detection circuit 18 (block 2- 1) The voltage V corresponding to the calculation result is sent to the motor drive circuit 8. Further, the CPU 2 is based on the detection result from the angular velocity detection circuit 7 and the detection result from the lens position detection circuit 19 so as to cancel the shake of the camera in the Y-axis direction.
The moving amount of 6 is calculated (block 2-2), and the voltage according to the calculated result is sent to the motor drive circuit 9.
【００１８】ここで、モータ駆動回路８，９へのＣＰＵ
２からの入力電圧をＶin、モータ駆動回路８，９からモ
ータ１１，１２への印加電圧をＶout とすると、Ｖin−
Ｖout の関係は図２のようになる。すなわち、入力電圧
Ｖinと基準電圧Ｖref との差に比例した電圧が、モータ
１１，１２へ印加電圧Ｖout として印加される。つま
り、基準電圧Ｖref を境とする入力電圧Ｖinの変化に応
じて、モータ１１，１２への印加電圧Ｖout の極性が反
転する。本実施の形態では、モータ１１，１２としてＶ
ＣＭ（ボイスコイルモータ）を用いており、印加電圧Ｖ
out の値とモータ１１，１２に流れる電流はほゞ比例関
係であるから、基準電圧Ｖref を境とする入力電圧Ｖin
の変化に応じて、モータ１１，１２へ流れる電流の極性
が反転することになる。なお、本実施の形態では、基準
電圧Ｖref を２Ｖとしている。Here, the CPU for the motor drive circuits 8 and 9
When the input voltage from 2 is Vin and the voltage applied from the motor drive circuits 8 and 9 to the motors 11 and 12 is Vout, Vin-
The relationship of Vout is as shown in FIG. That is, a voltage proportional to the difference between the input voltage Vin and the reference voltage Vref is applied to the motors 11 and 12 as the applied voltage Vout. That is, the polarity of the voltage Vout applied to the motors 11 and 12 is inverted in accordance with the change of the input voltage Vin with the reference voltage Vref as a boundary. In this embodiment, V is used as the motors 11 and 12.
CM (voice coil motor) is used and the applied voltage V
Since the value of out and the currents flowing through the motors 11 and 12 are almost proportional to each other, the input voltage Vin with the reference voltage Vref as a boundary is set.
The polarity of the current flowing through the motors 11 and 12 is reversed according to the change of In this embodiment, the reference voltage Vref is 2V.
【００１９】また、モータ駆動回路８，９からモータ１
１，１２への印加電圧をＶout 、モータ１１，１２の像
振れ補正レンズ１６の駆動量をｍとすると、Ｖout −ｍ
の関係は図３のようになる。すなわち、モータ１１，１
２への印加電圧Ｖout に比例して、像振れ補正レンズ１
６の駆動量ｍが変化する。印加電圧Ｖout の極性が反転
すれば像振れ補正レンズ１６の駆動方向も反転する。こ
こでは、印加電圧Ｖout が１Ｖを越えると、駆動量ｍに
リミットがかかり１．５ｍｍ以上は駆動しなくなり、−
１Ｖを越えると、駆動量ｍにリミットがかかり−１．５
（ｍｍ）以上は駆動しなくなる。In addition, the motor drive circuits 8 and 9 are connected to the motor 1
If the applied voltage to the motors 1 and 12 is Vout and the drive amount of the image blur correction lens 16 of the motors 11 and 12 is m, then Vout-m
The relationship is as shown in FIG. That is, the motors 11, 1
The image blur correction lens 1 is proportional to the applied voltage Vout
The drive amount m of 6 changes. If the polarity of the applied voltage Vout is reversed, the driving direction of the image blur correction lens 16 is also reversed. Here, when the applied voltage Vout exceeds 1 V, the drive amount m is limited, and the drive is stopped for 1.5 mm or more.
If it exceeds 1V, the drive amount m will be limited -1.5.
(Mm) or more will not drive.
【００２０】例えば、像振れ補正レンズ１６のＹ軸方向
への駆動を考えると、ＣＰＵ２からモータ駆動回路９へ
の入力電圧Ｖinが基準電圧Ｖref より高い場合は、モー
タ１２へ正の電流が流れ、像振れ補正レンズ１６が上側
に駆動される。入力電圧Ｖinが基準電圧Ｖref より低い
場合は、モータ１２へ負の電流が流れ、像振れ補正レン
ズ１６が下側に駆動される。つまり、モータ駆動回路
８，９のＣＰＵ２からの入力電圧Ｖinに比例して、モー
タ１１，１２の像振れ補正レンズ１６の駆動量ｍが変化
することになる。For example, considering driving of the image blur correction lens 16 in the Y-axis direction, when the input voltage Vin from the CPU 2 to the motor drive circuit 9 is higher than the reference voltage Vref, a positive current flows to the motor 12, The image blur correction lens 16 is driven upward. When the input voltage Vin is lower than the reference voltage Vref, a negative current flows in the motor 12, and the image blur correction lens 16 is driven downward. That is, the drive amount m of the image blur correction lens 16 of the motors 11 and 12 changes in proportion to the input voltage Vin from the CPU 2 of the motor drive circuits 8 and 9.
【００２１】次に、この像振れ補正機能付きカメラにお
ける特徴的な動作について、その機能を交えながら説明
する。 〔通常の動作状態〕図４は通常の動作状態を示すタイム
チャートである。メインスイッチ２１がオンされた後、
半押しスイッチ２２がオンされた場合（図４（ｂ）に示
すｔ１点）、ＣＰＵ２は撮影処理を実行する。この場
合、ＣＰＵ２は、ＡＥ回路３を駆動しＡＥ演算を行い、
ＡＦ回路４を駆動しＡＦ演算を行う。図４（ｃ）に示す
ｔ３点で、全押しスイッチ２３がオンとされると、ＣＰ
Ｕ２は露出制御を行う。Next, the characteristic operation of the camera with the image blur correction function will be described together with its function. [Normal Operation State] FIG. 4 is a time chart showing a normal operation state. After the main switch 21 is turned on,
When the half-push switch 22 is turned on (point t1 shown in FIG. 4B), the CPU 2 executes the photographing process. In this case, the CPU 2 drives the AE circuit 3 to perform the AE calculation,
The AF circuit 4 is driven to perform AF calculation. When the full-press switch 23 is turned on at the point t3 shown in FIG.
U2 controls the exposure.
【００２２】〔露出制御のシーケンス〕２つのステッピ
ングモータでシャッタを駆動する場合、シャッタ制御信
号１，２（図４（ｈ），（ｉ））で示されるように、ｔ
３〜ｔ４で、ＡＦ演算で算出された位置までフォーカシ
ングレンズ１７を駆動する。次に、ｔ５〜ｔ６で、ＡＥ
演算で算出されたシャッタ速度とシャッタ絞りでシャッ
タセクタ（図示せず）を開閉し、露出を行う。そして、
ｔ６〜ｔ７でフォーカシングレンズ１７を初期位置に駆
動し、ｔ８点で撮影処理を終了する。[Sequence of Exposure Control] When the shutter is driven by two stepping motors, as shown by shutter control signals 1 and 2 (FIGS. 4H and 4I), t
At 3 to t4, the focusing lens 17 is driven to the position calculated by the AF calculation. Next, at t5 to t6, AE
Exposure is performed by opening and closing a shutter sector (not shown) with the shutter speed and shutter aperture calculated. And
The focusing lens 17 is driven to the initial position from t6 to t7, and the photographing process is ended at t8.
【００２３】〔像振れ補正処理〕ＣＰＵ２は、撮影処理
中、像振れ補正処理を行う。すなわち、半押しスイッチ
２２がオンとされた後のｔ２点において、角速度検出回
路６，７（図４（ｄ））、レンズ位置検出回路１８，１
９（図４（ｅ））の駆動を開始する。そして、全押しス
イッチ２３がオンとされると、モータ駆動回路８，９の
駆動を開始する（図４（ｆ）に示すｔ３点）。つまり、
半押しスイッチ２２がオンされてから全押しスイッチ２
３がオンされるまでは、像振れ補正レンズ１６の移動量
の算出を行い、全押しスイッチ２３がオンされてから、
算出された移動量に基づいて像振れ補正レンズ１６の駆
動を行う。[Image Shake Correction Processing] The CPU 2 performs image shake correction processing during the photographing processing. That is, at the point t2 after the half-push switch 22 is turned on, the angular velocity detection circuits 6 and 7 (FIG. 4D) and the lens position detection circuits 18 and 1 are connected.
9 (FIG. 4E) is started. Then, when the full-press switch 23 is turned on, driving of the motor drive circuits 8 and 9 is started (point t3 shown in FIG. 4F). That is,
Full-press switch 2 after half-press switch 22 is turned on
Until the switch 3 is turned on, the amount of movement of the image blur correction lens 16 is calculated, and after the full-press switch 23 is turned on,
The image blur correction lens 16 is driven based on the calculated movement amount.
【００２４】ＣＰＵ２は、像振れ補正レンズ１６の移動
量の算出を、ｔ２〜ｔ６まで所定のサンプリング周期で
行う。ＣＰＵ２は、ｔ３〜ｔ６まで随時、算出した移動
量に応じた電圧をモータ駆動回路８，９に出力する。モ
ータ駆動回路８，９は、ＣＰＵ２からの入力電圧Ｖinに
応じた電圧Ｖout （図２参照）をモータ１１，１２に印
加する。モータ１１，１２は、モータ駆動回路８，９か
らの印加電圧（アナログ電圧）Ｖout の値に応じた駆動
量ｍ（図３参照）で像振れ補正レンズ１６を駆動する。
ここでは、モータ１１，１２に、それぞれ図４（ｇ）に
示すような波形の電圧Ｖout が印加されるものとする。The CPU 2 calculates the movement amount of the image blur correction lens 16 in a predetermined sampling period from t2 to t6. The CPU 2 outputs a voltage according to the calculated movement amount to the motor drive circuits 8 and 9 at any time from t3 to t6. The motor drive circuits 8 and 9 apply the voltage Vout (see FIG. 2) according to the input voltage Vin from the CPU 2 to the motors 11 and 12. The motors 11 and 12 drive the image blur correction lens 16 with a drive amount m (see FIG. 3) according to the value of the applied voltage (analog voltage) Vout from the motor drive circuits 8 and 9.
Here, it is assumed that the voltage Vout having a waveform as shown in FIG. 4 (g) is applied to the motors 11 and 12, respectively.
【００２５】〔電源電圧の変化〕撮影処理中、電池電圧
（電源電圧）ＶB は、図４（ａ）に示すように変化す
る。すなわち、半押しスイッチ２２がオンとされると
（ｔ１点）、ＡＥ回路３，ＡＦ回路４が駆動される。ま
た、半押しスイッチ２２がオンとされてからのｔ２点で
は、角速度検出回路６，７、レンズ位置検出回路１８，
１９が駆動される。これにより、電源電圧ＶB は、徐々
に降下して行く。全押しスイッチ２３がオンとされると
（ｔ３点）、モータ駆動回路８，９が駆動され、更に電
源電圧ＶB は降下して行く。また、像振れ補正制御中
（ｔ３〜ｔ６）、モータ１１，１２が駆動されることに
より、更に電源電圧ＶB は降下する。像振れ補正制御が
完了し、上記各回路の駆動が停止されると（ｔ６点）、
電源電圧ＶB は徐々に上昇して行く。[Change in Power Supply Voltage] During the photographing process, the battery voltage (power supply voltage) VB changes as shown in FIG. 4 (a). That is, when the half-push switch 22 is turned on (point t1), the AE circuit 3 and the AF circuit 4 are driven. Further, at the point t2 after the half-push switch 22 is turned on, the angular velocity detection circuits 6 and 7, the lens position detection circuit 18,
19 is driven. As a result, the power supply voltage VB gradually drops. When the full-press switch 23 is turned on (point t3), the motor drive circuits 8 and 9 are driven, and the power supply voltage VB further drops. Further, during the image blur correction control (t3 to t6), the motors 11 and 12 are driven to further reduce the power supply voltage VB. When the image blur correction control is completed and the driving of the above circuits is stopped (t6 point),
The power supply voltage VB gradually rises.
【００２６】〔異常時の動作〕露出制御が完了するま
でに電源電圧ＶB が所定値Ｖ１より降下した場合を異常
時としてその動作を説明する。図５は異常時の動作を示
すタイムチャートである。ＣＰＵ２は、像振れ補正制御
を行っている間、電源電圧ＶB を監視している（ブロッ
ク２−３）。ＣＰＵ２は、モータ駆動回路８，９を駆動
して像振れ補正を実行している時に、電源電圧ＶB が所
定値Ｖ１より降下したことを検出した場合（図５に示す
ｔ９点）、モータ駆動回路８，９への入力電圧Ｖinを電
源電圧ＶBが所定値Ｖ１を下回ることのない最大限の電
圧値に制限する。[Operation in Abnormality] The operation will be described assuming that the power supply voltage VB drops below the predetermined value V1 by the time the exposure control is completed. FIG. 5 is a time chart showing the operation at the time of abnormality. The CPU 2 monitors the power supply voltage VB while performing the image blur correction control (block 2-3). When the CPU 2 detects that the power supply voltage VB has dropped below the predetermined value V1 while driving the motor drive circuits 8 and 9 and executing the image blur correction (point t9 shown in FIG. 5), the motor drive circuit The input voltage Vin to 8 and 9 is limited to the maximum voltage value at which the power supply voltage VB does not fall below the predetermined value V1.
【００２７】これによって、モータ１１，１２への印加
電圧Ｖout が電源電圧ＶB が所定値Ｖ１を下回ることの
ない最大限の電圧値に制限され、カメラ内での消費電流
が抑えられ、電源電圧ＶB が上昇する。なお、この場
合、像振れ補正レンズ１６の駆動量ｍは減少するが、す
なわち像振れ補正量の目標値と実際値との間に開きが生
じるが、モータ１１，１２への印加電圧Ｖout を電源電
圧ＶB が所定値Ｖ１を下回ることのない最大限の電圧値
に制限することから、可能な限りその開きを小さくする
ことができる。As a result, the voltage Vout applied to the motors 11 and 12 is limited to the maximum voltage value at which the power supply voltage VB does not fall below the predetermined value V1, the current consumption in the camera is suppressed, and the power supply voltage VB is reduced. Rises. In this case, although the drive amount m of the image blur correction lens 16 decreases, that is, there is a difference between the target value and the actual value of the image blur correction amount, the voltage Vout applied to the motors 11 and 12 is set to the power supply. Since the voltage VB is limited to the maximum voltage value that does not fall below the predetermined value V1, the opening can be made as small as possible.
【００２８】ＣＰＵ２は、電源電圧ＶB が所定値Ｖ１以
上になったことを検出すると（図５に示すｔ１０点）、
モータ駆動回路８，９への入力電圧Ｖinの制限を解除す
る。これによって、元の制御状態に戻り、像振れ補正量
の目標値と実際値とが合致するようになる。ＣＰＵ２
は、所定のサンプリング周期で電源電圧ＶB を検出する
ことによって、モータ１１，１２への印加電圧Ｖout の
制限制御を行い、像振れ補正中の電源電圧ＶB の異常な
低下を防止する。When the CPU 2 detects that the power supply voltage VB has become equal to or higher than the predetermined value V1 (t10 point shown in FIG. 5),
The restriction on the input voltage Vin to the motor drive circuits 8 and 9 is released. As a result, the original control state is restored, and the target value and the actual value of the image blur correction amount match. CPU2
Detects the power supply voltage VB at a predetermined sampling cycle to limit the voltage Vout applied to the motors 11 and 12 to prevent an abnormal decrease in the power supply voltage VB during image shake correction.
【００２９】なお、本実施の形態では、像振れ補正レン
ズ１６の駆動中に所定値Ｖ１を下回る電源電圧ＶB の低
下を検出した場合、ＣＰＵ２は、モータ１１および１２
への印加電圧Ｖout を同じ比率で制限する。すなわち、
ＣＰＵ２は、角速度検出回路６および７でのそれぞれの
検出結果に応じて、モータ駆動回路８および９への入力
電圧Ｖinを同一比率で減少させ、これによりモータ１１
および１２への印加電圧Ｖout を同一比率で減少させ、
電源電圧ＶB が所定値Ｖ１を下回ることのない最大限の
電圧値に制限する。In the present embodiment, when it is detected that the power supply voltage VB is lower than the predetermined value V1 while the image blur correction lens 16 is being driven, the CPU 2 causes the motors 11 and 12 to operate.
Limit the applied voltage Vout to the same ratio. That is,
The CPU 2 reduces the input voltage Vin to the motor drive circuits 8 and 9 at the same ratio in accordance with the detection results of the angular velocity detection circuits 6 and 7, whereby the motor 11
And reduce the applied voltage Vout to 12 and 12 at the same ratio,
The power supply voltage VB is limited to the maximum voltage value that does not fall below the predetermined value V1.
【００３０】〔異常時の動作〕図６は異常時の動作の
別の例を示すタイムチャートである。ＣＰＵ２は、像振
れ補正制御を行っている間、電源電圧ＶB を監視してい
る。ＣＰＵ２は、モータ駆動回路８，９を駆動して像振
れ補正を実行している時に、電源電圧ＶB が所定値Ｖ１
より降下したことを検出した場合（図６に示すｔ９
点）、モータ駆動回路８，９への入力電圧Ｖinを基準電
圧Ｖref に制限する。これによって、モータ１１，１２
への印加電圧Ｖout が０Ｖとなり、カメラ内での消費電
流が抑えられ、電源電圧ＶB が上昇する。なお、この場
合、像振れ補正レンズ１６の駆動量ｍは０ｍｍとなる。[Operation at Abnormality] FIG. 6 is a time chart showing another example of the operation at abnormal time. The CPU 2 monitors the power supply voltage VB while performing the image blur correction control. When the CPU 2 drives the motor drive circuits 8 and 9 to execute the image blur correction, the power supply voltage VB is set to the predetermined value V1.
When it is detected that the value is further lowered (t9 shown in FIG. 6)
Point), the input voltage Vin to the motor drive circuits 8 and 9 is limited to the reference voltage Vref. As a result, the motors 11 and 12
The applied voltage Vout to 0V becomes 0V, the current consumption in the camera is suppressed, and the power supply voltage VB rises. In this case, the drive amount m of the image blur correction lens 16 is 0 mm.
【００３１】ＣＰＵ２は、電源電圧ＶB が所定値Ｖ１以
上になったことを検出すると（図６に示すｔ１０点）、
モータ駆動回路８，９への入力電圧Ｖinの制限を解除す
る。これによって、元の制御状態に戻り、像振れ補正量
の目標値と実際値とが合致するようになる。ＣＰＵ２
は、所定のサンプリング周期で電源電圧ＶB を検出する
ことによって、モータ１１，１２への印加電圧Ｖout の
制限制御を行い、像振れ補正中の電源電圧ＶB の異常な
低下を防止する。When the CPU 2 detects that the power supply voltage VB has exceeded the predetermined value V1 (t10 point shown in FIG. 6),
The restriction on the input voltage Vin to the motor drive circuits 8 and 9 is released. As a result, the original control state is restored, and the target value and the actual value of the image blur correction amount match. CPU2
Detects the power supply voltage VB at a predetermined sampling cycle to limit the voltage Vout applied to the motors 11 and 12 to prevent an abnormal decrease in the power supply voltage VB during image shake correction.
【００３２】なお、上述においては、モータ１１，１２
をＶＣＭとしたが、ＤＣモータとしてＰＷＭ制御を行う
ようにした場合にも、同様にして適用することができ
る。すなわち、モータ１１，１２をＤＣモータとしてＰ
ＷＭ制御を行うようにした場合、上述した異常時の動作
と同様にして像振れ補正中の電源電圧ＶB の異常な低
下を防止するようにすれば、像振れ補正量の目標値と実
際値との間の開きを可能な限り小さくすることができ
る。すなわち、像振れ補正レンズ１６の駆動中に所定値
Ｖ１を下回る電源電圧ＶB の低下を検出した場合、ＤＣ
モータ１１，１２に対するＰＷＭのデューティ比を電源
電圧ＶB が所定値Ｖ１を下回ることのない最大限の値に
制限することによって、すなわちＤＣモータ１１，１２
への供給電力を電源電圧ＶB が所定値Ｖ１を下回ること
のない最大限の値に制限することによって、像振れ補正
量の目標値と実際値との間の開きを可能な限り小さくす
ることができる。In the above description, the motors 11 and 12 are
Is the VCM, but it can be similarly applied to the case where the PWM control is performed as the DC motor. That is, it is assumed that the motors 11 and 12 are DC motors.
When the WM control is performed, the target value and the actual value of the image shake correction amount can be obtained by preventing the abnormal decrease of the power supply voltage VB during the image shake correction in the same manner as the above-described operation at the time of abnormality. The gap between can be as small as possible. That is, when a decrease in the power supply voltage VB below the predetermined value V1 is detected during driving of the image blur correction lens 16, DC is detected.
By limiting the PWM duty ratio for the motors 11 and 12 to the maximum value at which the power supply voltage VB does not fall below the predetermined value V1, that is, the DC motors 11 and 12
The difference between the target value and the actual value of the image shake correction amount can be made as small as possible by limiting the power supplied to the power supply voltage VB to the maximum value at which the power supply voltage VB does not fall below the predetermined value V1. it can.
【００３３】また、上述において、電源電圧ＶB の低下
を検出する際の比較値として用いる所定値Ｖ１は、ＥＥ
ＰＲＯＭ５に格納しておいてもよい。また、上述した異
常時の動作では、電源電圧ＶB が所定値Ｖ１より降下
したことを検出した場合、モータ駆動回路８，９への入
力電圧Ｖinを基準電圧Ｖref に制限するようにしたが、
基準電圧Ｖref に限るものではなく、Ｖref 以外の所定
の値とするようにしてもよい。Further, in the above description, the predetermined value V1 used as the comparison value when detecting the decrease in the power supply voltage VB is EE.
It may be stored in the PROM 5. Further, in the above-described operation at the time of abnormality, when it is detected that the power supply voltage VB drops below the predetermined value V1, the input voltage Vin to the motor drive circuits 8 and 9 is limited to the reference voltage Vref.
The reference voltage is not limited to Vref, and may be a predetermined value other than Vref.
【００３４】[0034]
【発明の効果】以上説明したことから明らかなように本
発明によれば、第１発明によれば、補正光学系の駆動中
にカメラの電源電圧（ＶB ）が所定値（Ｖ１）を下回る
と、駆動手段への供給電力が電源電圧（ＶB ）が所定値
（Ｖ１）を下回ることのない最大限の電力値に制限され
るものとなり、また第２発明によれば、補正光学系の駆
動中にカメラの電源電圧（ＶB ）が所定値（Ｖ１）を下
回ると、駆動手段への印加電圧が電源電圧（ＶB ）が所
定値（Ｖ１）を下回ることのない最大限の電圧値に制限
されるものとなり、像振れ補正量の目標値と実際値との
間に大きな開きを生じさせることなく、像振れ補正中の
カメラの電池電圧の異常な低下を防止することが可能と
なる。As is apparent from the above description, according to the present invention, according to the first invention, when the power supply voltage (VB) of the camera falls below the predetermined value (V1) during the driving of the correction optical system. The power supplied to the driving means is limited to the maximum power value so that the power supply voltage (VB) does not fall below the predetermined value (V1). According to the second invention, the correction optical system is being driven. When the power supply voltage (VB) of the camera falls below the predetermined value (V1), the voltage applied to the driving means is limited to the maximum voltage value so that the power supply voltage (VB) does not fall below the predetermined value (V1). Therefore, it is possible to prevent an abnormal decrease in the battery voltage of the camera during image shake correction without causing a large difference between the target value and the actual value of the image shake correction amount.
【００３５】また、第３発明によれば、補正光学系の駆
動中にカメラの電源電圧（ＶB ）が所定値（Ｖ１）を下
回ると、第１の駆動手段および第２の駆動手段への供給
電力が電源電圧（ＶB ）が所定値（Ｖ１）を下回ること
のない最大限の電力値に制限されるものとなり、第４発
明によれば、補正光学系の駆動中にカメラの電源電圧
（ＶB ）が所定値（Ｖ１）を下回ると、第１の駆動手段
および第２の駆動手段への印加電圧が電源電圧（ＶB ）
が所定値（Ｖ１）を下回ることのない最大限の電圧値に
制限されるものとなり、像振れ補正量の目標値と実際値
との間に大きな開きを生じさせることなく、像振れ補正
中のカメラの電池電圧の異常な低下を防止することが可
能となる。According to the third aspect of the invention, when the power supply voltage (VB) of the camera falls below the predetermined value (V1) during the driving of the correction optical system, the power is supplied to the first driving means and the second driving means. The power is limited to the maximum power value so that the power supply voltage (VB) does not fall below the predetermined value (V1). According to the fourth invention, the power supply voltage (VB) of the camera is driven during the driving of the correction optical system. ) Is less than a predetermined value (V1), the voltage applied to the first drive means and the second drive means is the power supply voltage (VB).
Is limited to a maximum voltage value that does not fall below a predetermined value (V1), and a large difference is not generated between the target value and the actual value of the image shake correction amount. It is possible to prevent an abnormal drop in the battery voltage of the camera.
【図１】 本発明の一実施の形態を示す像振れ補正機能
付きカメラの構成を示すブロック図である。FIG. 1 is a block diagram showing a configuration of a camera with an image blur correction function according to an embodiment of the present invention.
【図２】 図１におけるモータ駆動回路へのＣＰＵから
の入力電圧Ｖinとモータ駆動回路からのモータへの印加
電圧Ｖout との関係を示す図である。FIG. 2 is a diagram showing a relationship between an input voltage Vin from a CPU to the motor drive circuit in FIG. 1 and a voltage Vout applied to the motor from the motor drive circuit.
【図３】 図１におけるモータへの印加電圧Ｖout と像
振れ補正レンズの駆動量ｍとの関係を示す図である。FIG. 3 is a diagram showing a relationship between a voltage Vout applied to the motor in FIG. 1 and a driving amount m of an image blur correction lens.
【図４】 図１に示した像振れ補正機能付きカメラの通
常の動作状態を示すタイムチャートである。FIG. 4 is a time chart showing a normal operation state of the camera with an image blur correction function shown in FIG.
【図５】 この像振れ補正機能付きカメラの異常時の動
作を示すタイムチャートである。FIG. 5 is a time chart showing the operation of the camera with the image blur correction function in the event of an abnormality.
【図６】 この像振れ補正機能付きカメラの異常時の動
作の別の例を示すタイムチャートである。FIG. 6 is a time chart showing another example of the operation at the time of abnormality of the camera with the image blur correction function.
１…電池、２…ＣＰＵ、５…ＥＥＰＲＯＭ、６…第１の
角速度検出回路、７…第２の角速度検出回路、８…第１
のモータ駆動回路、９…第２のモータ駆動回路 １１…モータ、１２…第２のモータ、１６…像振れ補正
レンズ、１８…第１のレンズ位置検出回路、１９…第２
のレンズ位置検出回路。DESCRIPTION OF SYMBOLS 1 ... Battery, 2 ... CPU, 5 ... EEPROM, 6 ... 1st angular velocity detection circuit, 7 ... 2nd angular velocity detection circuit, 8 ... 1st
Motor drive circuit, 9 ... second motor drive circuit 11 ... motor, 12 ... second motor, 16 ... image shake correction lens, 18 ... first lens position detection circuit, 19 ... second
Lens position detection circuit.
Claims (7)
と、像振れを補正するための補正光学系と、この補正光
学系を駆動する駆動手段と、前記補正光学系の位置を検
出する位置検出手段と、前記振れ検出手段からの検出結
果と前記位置検出手段からの検出結果とに基づきカメラ
の振れを打ち消すような前記補正光学系の移動量を算出
する移動量算出手段と、この移動量算出手段により算出
された移動量に応じ前記駆動手段を介して前記補正光学
系を駆動するドライバ手段とを備えた像振れ補正機能付
きカメラにおいて、 カメラの電源電圧を監視する電源電圧監視手段と、 この電源電圧監視手段が前記補正光学系の駆動中に所定
値を下回る電源電圧の低下を検出した場合、前記駆動手
段への供給電力を前記電源電圧が前記所定値を下回るこ
とのない最大限の電力値に制限する供給電力制限手段と
を備えたことを特徴とする像振れ補正機能付きカメラ。1. A shake detection means for detecting a shake of a camera, a correction optical system for correcting an image shake, a driving means for driving the correction optical system, and a position detection for detecting a position of the correction optical system. Means, a movement amount calculation means for calculating a movement amount of the correction optical system that cancels the shake of the camera based on the detection result from the shake detection means and the detection result from the position detection means, and the movement amount calculation In a camera with an image blur correction function, which includes a driver unit that drives the correction optical system via the drive unit according to the movement amount calculated by the unit, a power supply voltage monitoring unit that monitors the power supply voltage of the camera, When the power supply voltage monitoring means detects a decrease in the power supply voltage below a predetermined value during the driving of the correction optical system, the power supply to the driving means may be lower than the predetermined value. There the image blur correcting function camera, characterized in that a supply power limiting means for limiting the maximum power value.
と、像振れを補正するための補正光学系と、印加される
アナログ電圧の値に応じた駆動量で前記補正光学系を駆
動する駆動手段と、前記補正光学系の位置を検出する位
置検出手段と、前記振れ検出手段からの検出結果と前記
位置検出手段からの検出結果とに基づきカメラの振れを
打ち消すような前記補正光学系の移動量を算出する移動
量算出手段と、この移動量算出手段により算出された移
動量に応じ前記駆動手段を介して前記補正光学系を駆動
するドライバ手段とを備えた像振れ補正機能付きカメラ
において、 カメラの電源電圧を監視する電源電圧監視手段と、 この電源電圧監視手段が前記補正光学系の駆動中に所定
値を下回る電源電圧の低下を検出した場合、前記駆動手
段への印加電圧を前記電源電圧が前記所定値を下回るこ
とのない最大限の電圧値に制限する印加電圧制限手段と
を備えたことを特徴とする像振れ補正機能付きカメラ。2. A shake detecting means for detecting a shake of a camera, a correction optical system for correcting an image shake, and a driving means for driving the correction optical system with a drive amount according to a value of an analog voltage applied. A position detecting means for detecting the position of the correction optical system, and a movement amount of the correction optical system for canceling the shake of the camera based on the detection result from the shake detecting means and the detection result from the position detecting means. In a camera with an image blur correction function, the camera includes: a movement amount calculation unit that calculates the movement amount; and a driver unit that drives the correction optical system via the driving unit according to the movement amount calculated by the movement amount calculation unit. Power supply voltage monitoring means for monitoring the power supply voltage of the device, and when the power supply voltage monitoring means detects a decrease in the power supply voltage below a predetermined value during the driving of the correction optical system, the voltage applied to the driving means is The image blur correcting function camera, wherein the power supply voltage and a voltage applied limiting means for limiting the voltage value of the maximum never falls below the predetermined value.
の振れ検出手段と、カメラの鉛直方向の振れを検出する
第２の振れ検出手段と、像振れを補正するための補正光
学系と、この補正光学系を水平方向に駆動する第１の駆
動手段と、前記補正光学系を鉛直方向に駆動する第２の
駆動手段と、前記補正光学系の水平方向の位置を検出す
る第１の位置検出手段と、前記補正光学系の鉛直方向の
位置を検出する第２の位置検出手段と、前記第１の振れ
検出手段からの検出結果と前記第１の位置検出手段から
の検出結果とに基づきカメラの水平方向の振れを打ち消
すような前記補正光学系の移動量を算出する水平方向移
動量算出手段と、前記第２の振れ検出手段からの検出結
果と前記第２の位置検出手段からの検出結果とに基づき
カメラの鉛直方向の振れを打ち消すような前記補正光学
系の移動量を算出する鉛直方向移動量算出手段と、前記
水平方向移動量算出手段により算出された移動量に応じ
前記第１の駆動手段を介して前記補正光学系を水平方向
に駆動する第１のドライバ手段と、前記鉛直方向移動量
算出手段により算出された移動量に応じ前記第２の駆動
手段を介して前記補正光学系を鉛直方向に駆動する第２
のドライバ手段とを備えた像振れ補正機能付きカメラに
おいて、 カメラの電源電圧を監視する電源電圧監視手段と、 この電源電圧監視手段が前記補正光学系の駆動中に所定
値を下回る電源電圧の低下を検出した場合、前記第１の
駆動手段および第２の駆動手段への供給電力を前記電源
電圧が前記所定値を下回ることのない最大限の電力値に
制限する供給電力制限手段とを備えたことを特徴とする
像振れ補正機能付きカメラ。3. A first camera for detecting horizontal shake of a camera.
Shake detecting means, second shake detecting means for detecting shake in the vertical direction of the camera, correction optical system for correcting image shake, and first driving means for driving this correction optical system in the horizontal direction. A second driving means for driving the correction optical system in the vertical direction, a first position detecting means for detecting a horizontal position of the correction optical system, and a vertical position of the correction optical system. Of the correction optical system for canceling the shake in the horizontal direction of the camera based on the detection result from the first shake detecting unit and the detection result from the first shake detecting unit. A horizontal movement amount calculating means for calculating a movement amount; and a vertical movement amount of the camera canceled based on a detection result from the second shake detecting means and a detection result from the second position detecting means. Calculate the movement amount of the correction optical system Vertical movement amount calculating means, and first driver means for horizontally driving the correction optical system via the first driving means in accordance with the movement amount calculated by the horizontal movement amount calculating means, Second driving the correction optical system in the vertical direction via the second driving means in accordance with the movement amount calculated by the vertical movement amount calculating means
In the camera with an image blur correction function, the power supply voltage monitoring means monitors the power supply voltage of the camera, and the power supply voltage drops below a predetermined value while the power supply voltage monitoring means drives the correction optical system. And a power supply limiting means for limiting the power supply to the first drive means and the second drive means to the maximum power value at which the power supply voltage does not fall below the predetermined value. A camera with an image blur correction function that is characterized by this.
の振れ検出手段と、カメラの鉛直方向の振れを検出する
第２の振れ検出手段と、像振れを補正するための補正光
学系と、印加されるアナログ電圧の値に応じた駆動量で
前記補正光学系を水平方向に駆動する第１の駆動手段
と、印加されるアナログ電圧の値に応じた駆動量で前記
補正光学系を鉛直方向に駆動する第２の駆動手段と、前
記補正光学系の水平方向の位置を検出する第１の位置検
出手段と、前記補正光学系の鉛直方向の位置を検出する
第２の位置検出手段と、前記第１の振れ検出手段からの
検出結果と前記第１の位置検出手段からの検出結果とに
基づきカメラの水平方向の振れを打ち消すような前記補
正光学系の移動量を算出する水平方向移動量算出手段
と、前記第２の振れ検出手段からの検出結果と前記第２
の位置検出手段からの検出結果とに基づきカメラの鉛直
方向の振れを打ち消すような前記補正光学系の移動量を
算出する鉛直方向移動量算出手段と、前記水平方向移動
量算出手段により算出された移動量に応じ前記第１の駆
動手段を介して前記補正光学系を水平方向に駆動する第
１のドライバ手段と、前記鉛直方向移動量算出手段によ
り算出された移動量に応じ前記第２の駆動手段を介して
前記補正光学系を鉛直方向に駆動する第２のドライバ手
段とを備えた像振れ補正機能付きカメラにおいて、 カメラの電源電圧を監視する電源電圧監視手段と、 この電源電圧監視手段が前記補正光学系の駆動中に所定
値を下回る電源電圧の低下を検出した場合、前記第１の
駆動手段および第２の駆動手段への印加電圧を前記電源
電圧が前記所定値を下回ることのない最大限の電圧値に
制限する印加電圧制限手段とを備えたことを特徴とする
像振れ補正機能付きカメラ。4. A first camera for detecting horizontal shake of a camera.
Shake detecting means, a second shake detecting means for detecting shake in the vertical direction of the camera, a correction optical system for correcting image shake, and the above-mentioned correction with a drive amount according to the value of the analog voltage applied. A first drive means for driving the optical system in the horizontal direction; a second drive means for driving the correction optical system in the vertical direction with a drive amount according to the value of the applied analog voltage; First position detecting means for detecting a horizontal position, second position detecting means for detecting a vertical position of the correction optical system, detection results from the first shake detecting means, and the first Horizontal movement amount calculation means for calculating the movement amount of the correction optical system that cancels the horizontal shake of the camera based on the detection result from the position detection means, and the detection result from the second shake detection means. And the second
Based on the detection result from the position detection means, the vertical movement amount calculation means for calculating the movement amount of the correction optical system that cancels the vertical shake of the camera and the horizontal movement amount calculation means are calculated. First driver means for driving the correction optical system in the horizontal direction via the first drive means according to the movement amount, and the second drive means according to the movement amount calculated by the vertical movement amount calculation means. In the camera with an image blur correction function, the power source voltage monitoring means for monitoring the power source voltage of the camera, and the power source voltage monitoring means are provided. When a drop in the power supply voltage below a predetermined value is detected during the driving of the correction optical system, the power supply voltage falls below the predetermined value for the voltage applied to the first drive means and the second drive means. Image blur correction function camera, characterized in that a voltage applied limiting means for limiting the maximum voltage value never.
は、電源電圧監視手段が補正光学系の駆動中に所定値を
下回る電源電圧の低下を検出した場合、第１および第２
の駆動手段への供給電力を、第１の振れ検出手段および
第２の振れ検出手段での検出結果に応じて同一比率で減
少させ、前記電源電圧が前記所定値を下回ることのない
最大限の電力値に制限することを特徴とする像振れ補正
機能付きカメラ。5. The power supply limiting means according to claim 3, wherein the power supply voltage monitoring means detects the power supply voltage drop below a predetermined value during the driving of the correction optical system.
The power supply to the driving means is reduced at the same ratio in accordance with the detection results of the first shake detecting means and the second shake detecting means, and the maximum power supply voltage does not fall below the predetermined value. A camera with image blur correction function, which is limited to the power value.
は、電源電圧監視手段が補正光学系の駆動中に所定値を
下回る電源電圧の低下を検出した場合、第１および第２
の駆動手段への印加電圧を、第１の振れ検出手段および
第２の振れ検出手段での検出結果に応じて同一比率で減
少させ、前記電源電圧が前記所定値を下回ることのない
最大限の電圧値に制限することを特徴とする像振れ補正
機能付きカメラ。6. The applied voltage limiting means according to claim 4, wherein when the power supply voltage monitoring means detects a decrease in the power supply voltage below a predetermined value during driving of the correction optical system,
The applied voltage to the driving means is reduced at the same ratio according to the detection results of the first shake detection means and the second shake detection means, and the maximum power supply voltage does not fall below the predetermined value. A camera with an image shake correction function that is limited to a voltage value.
源電圧の低下を検出する際の比較値として用いる所定値
が不揮発性メモリに記憶されていることを特徴とする像
振れ補正機能付きカメラ。7. The image blur correction function according to claim 1, wherein a predetermined value used as a comparison value when detecting a decrease in the power supply voltage is stored in a non-volatile memory. With camera.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP23665695A JPH0980573A (en) | 1995-09-14 | 1995-09-14 | Camera equipped with image blurring correcting function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP23665695A JPH0980573A (en) | 1995-09-14 | 1995-09-14 | Camera equipped with image blurring correcting function |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0980573A true JPH0980573A (en) | 1997-03-28 |
Family
ID=17003850
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP23665695A Pending JPH0980573A (en) | 1995-09-14 | 1995-09-14 | Camera equipped with image blurring correcting function |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0980573A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2014109584A (en) * | 2012-11-30 | 2014-06-12 | Nidec Sankyo Corp | Optical unit and driving device for electromagnetic actuator |
| JP2016057328A (en) * | 2014-09-05 | 2016-04-21 | リコーイメージング株式会社 | Photographing device and method for controlling the same |
-
1995
- 1995-09-14 JP JP23665695A patent/JPH0980573A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2014109584A (en) * | 2012-11-30 | 2014-06-12 | Nidec Sankyo Corp | Optical unit and driving device for electromagnetic actuator |
| JP2016057328A (en) * | 2014-09-05 | 2016-04-21 | リコーイメージング株式会社 | Photographing device and method for controlling the same |
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