JPH021832A - Image controller - Google Patents
Image controllerInfo
- Publication number
- JPH021832A JPH021832A JP63142167A JP14216788A JPH021832A JP H021832 A JPH021832 A JP H021832A JP 63142167 A JP63142167 A JP 63142167A JP 14216788 A JP14216788 A JP 14216788A JP H021832 A JPH021832 A JP H021832A
- Authority
- JP
- Japan
- Prior art keywords
- panel
- image
- photoelectric conversion
- liquid crystal
- conversion element
- 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
- 238000006243 chemical reaction Methods 0.000 claims abstract description 26
- 239000004973 liquid crystal related substance Substances 0.000 claims abstract description 24
- 239000011159 matrix material Substances 0.000 claims abstract description 5
- 238000001514 detection method Methods 0.000 claims description 13
- 238000002834 transmittance Methods 0.000 claims description 5
- 230000003287 optical effect Effects 0.000 abstract 1
- 239000011521 glass Substances 0.000 description 6
- 238000010586 diagram Methods 0.000 description 4
- 239000003795 chemical substances by application Substances 0.000 description 1
Landscapes
- Liquid Crystal (AREA)
- Exposure Control For Cameras (AREA)
Abstract
Description
【発明の詳細な説明】
産業上の利用分野
本発明は、カメラやビデオカメラに利用される画像制御
装置に関するものである。DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to an image control device used in cameras and video cameras.
従来の技術
従来、カメラ等の画像制御装置としては、被写体の明る
さの平均に応じて絞りを制御する自動レベル制御（ＡＬ
Ｃ）装置が用いられている。Conventional technology Conventionally, image control devices such as cameras have been equipped with automatic level control (AL), which controls the aperture according to the average brightness of the subject.
C) the device is being used.
以下、従来のＡＬＣ装置について説明する。A conventional ALC device will be described below.
第４図は従来のＡＬＣ装置の構成図であり、１５は人物
や光源などの被写体、１６はレンズ、１７は複数の羽根
を組み合わせて、機械的にその重なりの角度を変化させ
ることによって開口面積を変える絞り装置、１８は光を
電気信号に変える光電変換素子、１９は光電変換素子１
８からの出力信号の平均値を検出する平均値検出回路、
２０は平均値検出回路１９の出力に応じて紋り装置１７
を制御する制御回路、２１はフィルムあるいは固体撮像
素子、２２はレンズ１６と上記絞り装置１７を通って来
た被写体１５からの光を、フィルムあるいは固体撮像素
子２１へ行く光と、光電変換素子１８へ行（光とに分け
るためのハーフミラ−である。Figure 4 is a configuration diagram of a conventional ALC device, in which 15 is a subject such as a person or a light source, 16 is a lens, and 17 is a combination of multiple blades, and the aperture area is changed by mechanically changing the overlapping angle of the blades. 18 is a photoelectric conversion element that converts light into an electrical signal; 19 is photoelectric conversion element 1;
an average value detection circuit that detects the average value of the output signal from 8;
20 is a print device 17 according to the output of the average value detection circuit 19;
21 is a film or solid-state image sensor; 22 is a control circuit that converts light from the subject 15 that has passed through the lens 16 and the aperture device 17 to the film or solid-state image sensor 21; and a photoelectric conversion element 18. This is a half mirror to separate the light and the light.
まず、被写体１５から出た光は、レンズ１６と紋り装置
１７を通る。次に、この光はハーフミラ−２２によって
、フィルムあるいは固体撮像素子２１へ行く光と光電変
換素子１８へ行く光とに分けられる。光電変換素子１８
へ入射した光は、その輝度に応じた電気信号に変換され
る。光電変換素子１８からの出力信号は、平均値検出回
路１９によってその平均値を検出される。次に制御回路
２０は、平均値検出回路１９の出力信号に応じて紋り装
置１７の開口面積を変化させる。その結果、フィルムあ
るいは固体撮像素子２１へ到達する光量は変化し、この
光量が適当な値になるまで、絞り装置１７の開口面積は
変化をつづける。First, the light emitted from the subject 15 passes through the lens 16 and the fringing device 17. Next, this light is divided by a half mirror 22 into light that goes to the film or solid-state image sensor 21 and light that goes to the photoelectric conversion element 18 . Photoelectric conversion element 18
The incident light is converted into an electrical signal according to its brightness. The average value of the output signal from the photoelectric conversion element 18 is detected by an average value detection circuit 19. Next, the control circuit 20 changes the aperture area of the fringing device 17 according to the output signal of the average value detection circuit 19. As a result, the amount of light reaching the film or solid-state image sensor 21 changes, and the aperture area of the diaphragm device 17 continues to change until this amount of light reaches an appropriate value.
発明が解決しようとする課題
しかしながら、上記従来のＡＬＣ装置では、暗い部屋の
中で人物と光源が並んで小さく写っているような画像で
は、その画像の大部分を占めている暗い部分に露出があ
うように絞り装置１７の開口面積が制御され、光源のそ
ばの人物には露出があわないので美しくうつらないとい
う欠点があった。Problems to be Solved by the Invention However, with the above-mentioned conventional ALC device, in an image where a person and a light source appear side by side and small in a dark room, the dark part that occupies most of the image is overexposed. The aperture area of the diaphragm device 17 is controlled so that the exposure of a person near the light source does not match, so the image cannot be captured beautifully.
本発明は、上記従来の課題を解決することのできる画像
制御装置を提供することを目的とする。An object of the present invention is to provide an image control device that can solve the above-mentioned conventional problems.
課題を解決するための手段
この目的を達成するために本発明の画像制御装置は、複
数のセグメントをマトリックス状に配置した液晶パネル
と、上記液晶パネルの総数のセグメントに対応し、上記
各セグメントの透過光を電気信号に変換する複数の画素
を有する光電変換素子パネルと、上記光電変換素子パネ
ルの複数の画素からの出力信号の平均値を検出する平均
値検出手段と、上記平均値検出手段からの出力値と上記
各画素からの出力信号のレベルとを比較する比較手段と
、上記比較手段の出力に応じて上記光電変換素子パネル
の各画素に対応する上記液晶パネルの各セグメントの光
透過度を制御する制御手段とを備えている。Means for Solving the Problems To achieve this object, an image control device of the present invention includes a liquid crystal panel in which a plurality of segments are arranged in a matrix, a total number of segments of the liquid crystal panel, and a plurality of segments for each of the segments. A photoelectric conversion element panel having a plurality of pixels that converts transmitted light into an electrical signal, an average value detection means for detecting an average value of output signals from the plurality of pixels of the photoelectric conversion element panel, and from the above average value detection means. a comparison means for comparing the output value of and the level of the output signal from each pixel; and a light transmittance of each segment of the liquid crystal panel corresponding to each pixel of the photoelectric conversion element panel according to the output of the comparison means. and control means for controlling.
作用
この構成により、液晶パネルの各セグメントの透過光量
が調整でき、全被写体間の明暗比を制御できる。Function: With this configuration, the amount of light transmitted through each segment of the liquid crystal panel can be adjusted, and the contrast ratio between all objects can be controlled.
実施例
つぎに、本発明を実施例によって、図面を参照しながら
説明する。第１図は本発明の実施例装置の概要構成図で
あり、１は人物や光源などの被写体、２はレンズ、３は
液晶パネル、４は光を電気信号に変える光電変換素子パ
ネル、５は光電変換素子パネル４からの出力信号の平均
値を検出する平均値検出回路、６は平均値検出回路５が
らの出力値と光電変換素子パネル４の各画素がらの出力
信号のレベルを比較する比較回路、７は比較回路６の出
力に応じて光電変換素子パネル４の各画素に対応する液
晶パネル３の各セグメントの光透過度を制御する制御回
路、８はフィルムあるいは固体撮像素子、９はハーフミ
ラ−である。EXAMPLES Next, the present invention will be described by way of examples with reference to the drawings. FIG. 1 is a schematic configuration diagram of an apparatus according to an embodiment of the present invention, in which 1 is a subject such as a person or a light source, 2 is a lens, 3 is a liquid crystal panel, 4 is a photoelectric conversion element panel that converts light into an electrical signal, and 5 is a photoelectric conversion element panel that converts light into an electrical signal. An average value detection circuit 6 detects the average value of the output signal from the photoelectric conversion element panel 4, and a comparison unit 6 compares the output value from the average value detection circuit 5 with the level of the output signal from each pixel of the photoelectric conversion element panel 4. 7 is a control circuit that controls the light transmittance of each segment of the liquid crystal panel 3 corresponding to each pixel of the photoelectric conversion element panel 4 according to the output of the comparison circuit 6, 8 is a film or solid-state image sensor, and 9 is a half mirror. − is.
第２図は第１図に示した液晶パネル３の断面図であり、
１０は表面ガラス、１１は裏面ガラス、１２ａから１２
ｅは、表面ガラス１０と裏面ガラス１１との間に閉じ込
められた各セグメントの液晶部分、１３ａから１３ｅは
、それぞれ１２ａがＥ、 １２ ｅに対応した電極であ
り、各セグメントは、それぞれ液晶部分１２ａがら１２
ｅと、それに対応する上記電極１３ａから１３ｅのおの
おのの組み合わせからなる。FIG. 2 is a cross-sectional view of the liquid crystal panel 3 shown in FIG.
10 is the front glass, 11 is the back glass, 12a to 12
e is the liquid crystal part of each segment confined between the front glass 10 and the back glass 11, 13a to 13e are electrodes corresponding to E and 12e, respectively, and each segment is the liquid crystal part 12a, respectively. Gara 12
e and the corresponding combinations of the electrodes 13a to 13e.
第３図は第１図に示した液晶パネル３を上から見た平面
図であり、各セグメントがマトリックス状に配置されて
いる。１４ａから１４ｙは、第２図において説明したよ
うにそれぞれ１つの液晶部分と１つの電極から構成され
ているセグメントである。FIG. 3 is a top plan view of the liquid crystal panel 3 shown in FIG. 1, in which segments are arranged in a matrix. 14a to 14y are segments each consisting of one liquid crystal portion and one electrode, as explained in FIG.
まず、被写体１から出た光は、レンズ２と液晶パネル３
を通る。次に、この光は、ハーフミラ−９によってフィ
ルムあるいは固体撮像素子８へ行（光と光電変換素子パ
ネル４へ行（光とに分けられる。光電変換素子パネル４
に入射した光は、各画素ごとにその輝度に応じた電気信
号に変換される。光電変換素子パネル４の各画素からの
出力信号はまず、平均値検出回路５によって、その平均
値を検出される。次に、光電変換素子パネル４の各画素
からの出力は、比較回路６において、平均値検出回路５
からの出力と比較される。そして、制御回路７は、比較
回路６からの出力信号に応じて液晶パネル３の各セグメ
ントのｔｉ１３ａから１３ｅのそれぞれに印加する電圧
を変化させる。First, the light emitted from subject 1 is transmitted through lens 2 and liquid crystal panel 3.
pass through. Next, this light is divided by the half mirror 9 into a film or solid-state image sensor 8 (light) and a photoelectric conversion element panel 4 (light).
The light incident on the pixel is converted into an electrical signal corresponding to the brightness of each pixel. The average value of the output signal from each pixel of the photoelectric conversion element panel 4 is first detected by the average value detection circuit 5. Next, the output from each pixel of the photoelectric conversion element panel 4 is sent to an average value detection circuit 5 in a comparison circuit 6.
is compared with the output from . Then, the control circuit 7 changes the voltage applied to each of the segments ti 13a to ti 13e of the liquid crystal panel 3 according to the output signal from the comparison circuit 6.
比較回路６においては、平均値と各画素とのレベルの差
が、平均値とあらかじめ定められた倍率との積より大き
ければ、その差に応じて電圧が出力される。たとえば、
暗い部屋で小さな光源があるような場合、その光電変換
素子パネル４からの出力の平均値は、非常に小さい。と
ころが、その光源に対応している光電変換素子パネル４
の画素からの出力は非常に大きい。この差が平均値のあ
る一定倍よりも大きい場合には、この画素に対応してい
る液晶パネル３のセグメントの電極には、このセグメン
トの光透過度が、小さくなるように制御回路７から電圧
が与えられる。ここで、比較のための倍率をフィルムあ
るいは固体撮像素子８のエチュードにあわせておけば、
いかにその画像の明暗のコントラストの比が太き（でも
、制御回路７からの出力により液晶パネル３の各セグメ
ントは、その光透過度を制御され、フィルムあるいは固
体撮像素子８においては、そのエチュードの範囲内にお
さまった美しい画像を得ることができる。In the comparator circuit 6, if the difference between the average value and the level of each pixel is larger than the product of the average value and a predetermined magnification, a voltage is output according to the difference. for example,
When there is a small light source in a dark room, the average value of the output from the photoelectric conversion element panel 4 is very small. However, the photoelectric conversion element panel 4 corresponding to that light source
The output from the pixels is very large. If this difference is larger than a certain multiple of the average value, a voltage is applied to the electrode of the segment of the liquid crystal panel 3 corresponding to this pixel from the control circuit 7 so as to reduce the light transmittance of this segment. is given. Here, if the magnification for comparison is adjusted to the etude of the film or solid-state image sensor 8,
No matter how large the contrast ratio between light and dark is in the image, the light transmittance of each segment of the liquid crystal panel 3 is controlled by the output from the control circuit 7. You can obtain beautiful images within the range.
発明の効果
以上のように本発明の画像ｍＩＩ御装置によれば、いか
に明暗のコントラストの比の大きな被写体であっても、
美しくうつすことができるという効果がある。Effects of the Invention As described above, according to the image mII control device of the present invention, no matter how large the contrast ratio between brightness and darkness is,
It has the effect of making it look beautiful.
第１図は本発明の一実施例を示す概要構成図、第２図は
第１図に示した液晶パネル３の断面図、第３図は第１図
に示した液晶パネル３を上から見た平面図、第４図は従
来のＡＬＣ装置を示す概要構成図である。
１．１５・・・・・・被写体、２，１６・・目・・レン
ズ、３・・・・・・液晶パネル、４・・・・・・光電変
換素子パネル、５．１９・・・・・・平均値検出回路、
６・・・・・・比較回路、７．２０・・・・・・制御回
路、８，２１・・・・・・フィルムあるいは固体撮像素
子、９，２２・・・・・・ハーフミラ−１０・・・・・
・表面ガラス、１１・旧・・裏面ガラス、１２ａ〜１２
ｅ・・・・・・液晶部分、１３ａ〜１３ｅ・・・・・・
電極、１４ａ〜１４ｙ・・・・・・セグメント、１７・
・・・・・絞り、１８・・・・・・光電変換素子。
代理人の氏名 弁理士 中尾敏男 はが１名ｆ・−被写
体
２−一しシブ゛
９−バー穴ラ−FIG. 1 is a schematic configuration diagram showing an embodiment of the present invention, FIG. 2 is a sectional view of the liquid crystal panel 3 shown in FIG. 1, and FIG. 3 is a top view of the liquid crystal panel 3 shown in FIG. FIG. 4 is a schematic diagram showing a conventional ALC device. 1.15... Subject, 2, 16... Eyes... Lens, 3... Liquid crystal panel, 4... Photoelectric conversion element panel, 5.19...・・Average value detection circuit,
6... Comparison circuit, 7.20... Control circuit, 8, 21... Film or solid-state image sensor, 9, 22... Half mirror 10.・・・・・・
・Surface glass, 11 ・Old...Back glass, 12a~12
e...Liquid crystal part, 13a-13e...
Electrode, 14a-14y... Segment, 17.
...Aperture, 18...Photoelectric conversion element. Name of agent: Patent attorney Toshio Nakao 1 person f・-Subject 2-1 Shibu 9-Bar hole-
Claims (1)
ルと、上記液晶パネルの総数のセグメントに対応し、上
記各セグメントの透過光を電気信号に変換する複数の画
素を有する光電変換素子パネルと、上記光電変換素子パ
ネルの複数の画素からの出力信号の平均値を検出する平
均値検出手段と、上記平均値検出手段からの出力値と上
記各画素からの出力信号のレベルとを比較する比較手段
と、上記比較手段の出力に応じて、上記光電変換素子パ
ネルの各画素に対応する上記液晶パネルの各セグメント
の光透過度を制御する制御手段とを備えた画像制御装置
。a liquid crystal panel in which a plurality of segments are arranged in a matrix; a photoelectric conversion element panel having a plurality of pixels corresponding to the total number of segments of the liquid crystal panel and converting transmitted light of each segment into an electrical signal; and the photoelectric conversion element panel. average value detection means for detecting the average value of output signals from a plurality of pixels of the element panel; comparison means for comparing the output value from the average value detection means with the level of the output signal from each of the pixels; An image control device comprising: control means for controlling light transmittance of each segment of the liquid crystal panel corresponding to each pixel of the photoelectric conversion element panel according to the output of the comparison means.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63142167A JPH021832A (en) | 1988-06-09 | 1988-06-09 | Image controller |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63142167A JPH021832A (en) | 1988-06-09 | 1988-06-09 | Image controller |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH021832A true JPH021832A (en) | 1990-01-08 |
Family
ID=15308913
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP63142167A Pending JPH021832A (en) | 1988-06-09 | 1988-06-09 | Image controller |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH021832A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0884288A (en) * | 1994-09-09 | 1996-03-26 | Rhythm Watch Co Ltd | Image pickup device |
| WO2006119541A1 (en) * | 2005-05-10 | 2006-11-16 | Live Technologies Limited | An electro-optical filter |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6054575A (en) * | 1983-09-05 | 1985-03-29 | Olympus Optical Co Ltd | Automatic dimming device for image pickup using liquid crystal filter |
| JPS62209979A (en) * | 1986-03-11 | 1987-09-16 | Nippon Denso Co Ltd | Automatic light quantity controller for tv camera |
-
1988
- 1988-06-09 JP JP63142167A patent/JPH021832A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6054575A (en) * | 1983-09-05 | 1985-03-29 | Olympus Optical Co Ltd | Automatic dimming device for image pickup using liquid crystal filter |
| JPS62209979A (en) * | 1986-03-11 | 1987-09-16 | Nippon Denso Co Ltd | Automatic light quantity controller for tv camera |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0884288A (en) * | 1994-09-09 | 1996-03-26 | Rhythm Watch Co Ltd | Image pickup device |
| WO2006119541A1 (en) * | 2005-05-10 | 2006-11-16 | Live Technologies Limited | An electro-optical filter |
| US7755720B2 (en) | 2005-05-10 | 2010-07-13 | Live Technologies, Ltd | Electro-optical filter |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US20200195818A1 (en) | Dual-Camera Module, Electronic Device, and Image Acquisition Method | |
| JP2001075140A (en) | Camera and optical filter switching method therefor | |
| CA2482146A1 (en) | Surveillance video camera | |
| WO2018159896A1 (en) | Surveillance camera having complex filtering-based autofocusing function robust to change in visibility state, and image surveillance system having same applied thereto | |
| JPH021832A (en) | Image controller | |
| JPH05110938A (en) | Lens unit for television camera | |
| JPH08139982A (en) | Solid-state image pickup device | |
| CN1522051A (en) | Dual image sensor photographing technique and apparatus thereof | |
| TW200301656A (en) | Image sensor having photosensitive color filters | |
| JPH08205021A (en) | Image input device | |
| JPH0370274A (en) | Image pickup device | |
| JPS6178571A (en) | Monitoring device for welding arc part | |
| JPH0622207A (en) | Image pickup device | |
| JPH07128635A (en) | Liquid crystal input light control filter for photoelectric conversion device | |
| KR20110015161A (en) | Apparatus for protecting image saturation | |
| JPS6387889A (en) | Image pickup device | |
| JPH08212465A (en) | Crime prevention system using monitor camera | |
| JP2721598B2 (en) | Video camera backlight compensation device | |
| JP2002290827A (en) | Monitor camera | |
| KR20230173294A (en) | Method for compensating an illuminance sensor in and camera device using the same | |
| JPH0470070A (en) | Image pickup device | |
| JPS6323134A (en) | Combined optical device | |
| JPS63198484A (en) | Auto iris television camera | |
| JPH0568207A (en) | Light quantity adjusting device in image pickup device | |
| JPH03220878A (en) | Automatic exposure correcter |