JPH0370274A - Image pickup device - Google Patents
Image pickup deviceInfo
- Publication number
- JPH0370274A JPH0370274A JP1206158A JP20615889A JPH0370274A JP H0370274 A JPH0370274 A JP H0370274A JP 1206158 A JP1206158 A JP 1206158A JP 20615889 A JP20615889 A JP 20615889A JP H0370274 A JPH0370274 A JP H0370274A
- Authority
- JP
- Japan
- Prior art keywords
- liquid crystal
- crystal panel
- light transmittance
- image pickup
- control signal
- 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
- 239000004973 liquid crystal related substance Substances 0.000 claims abstract description 35
- 238000002834 transmittance Methods 0.000 claims description 35
- 238000003384 imaging method Methods 0.000 claims description 17
- 230000000694 effects Effects 0.000 abstract description 9
- 230000005540 biological transmission Effects 0.000 abstract 3
- 230000003287 optical effect Effects 0.000 abstract 3
- 238000010586 diagram Methods 0.000 description 8
- 230000007274 generation of a signal involved in cell-cell signaling Effects 0.000 description 4
- 238000006243 chemical reaction Methods 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 239000000284 extract Substances 0.000 description 2
- 210000000988 bone and bone Anatomy 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000000873 masking effect Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000005070 sampling Methods 0.000 description 1
- 230000011664 signaling Effects 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
Abstract
Description
【発明の詳細な説明】
（イ）産業上の利用分野
本発明は、入射光を調整機構付きのビデオカメラ等の撮
像１置に関する。DETAILED DESCRIPTION OF THE INVENTION (a) Industrial Application Field The present invention relates to an imaging device such as a video camera with a mechanism for adjusting incident light.
（ロ）従来の技術
通常のビデオカメラでは、太陽下や室内等撮像環境に応
じて被写体照度が様々に変化しても、撮像素子への入射
光量を常に一定に保ち、撮像映像信号の輝度レベルが極
端に高いあるいは低い状態を回避するためにメカ的な絞
り機構が配されている。このメカ的な絞り機構は、数枚
の羽根と、この羽根の開閉機構により構成されるため、
絞り機構自体が小型化に適さず、ｌｌＩ戒部品点数が多
く、また消費電力も大きくなるというメカ式であること
による独特の欠点を有していた。(b) Conventional technology In ordinary video cameras, even if the illuminance of the subject varies depending on the imaging environment, such as under the sun or indoors, the amount of light incident on the image sensor is always kept constant, and the brightness level of the captured video signal is kept constant. A mechanical aperture mechanism is installed to avoid extremely high or low values. This mechanical aperture mechanism consists of several blades and an opening/closing mechanism for these blades.
The aperture mechanism itself is not suitable for miniaturization, has a large number of parts, and has unique disadvantages due to being a mechanical type, such as high power consumption.
そこで、特開昭６２−１６９５８７号公報（Ｈｏ ４
Ｎ ５ ／ ２３８ ）では、メカ的な絞り機構を用い
ず、撮像素子の前方に液晶パネルを配設し、この液晶パ
ネルの光透過率を電気的に制御することにより、入射光
量の調整を行う一例が提案されている。Therefore, Japanese Patent Application Laid-Open No. 62-169587 (Ho 4
N5/238), the amount of incident light is adjusted by placing a liquid crystal panel in front of the image sensor and electrically controlling the light transmittance of this liquid crystal panel, without using a mechanical aperture mechanism. An example is proposed.
前記従来技術では、撮像素子にて得られる撮像映像信号
の一画面分を該−画面骨の映像信号レベルとして積分し
、この積分値が常に一定となる様に液晶パネルのパネル
全体の光透過率を一律に制御して入射光量調整を図って
いる。In the conventional technology, one screen of the captured video signal obtained by the image sensor is integrated as the video signal level of the screen bone, and the light transmittance of the entire panel of the liquid crystal panel is adjusted so that this integrated value is always constant. is uniformly controlled to adjust the amount of incident light.
（ハ）発明が解決しようとする課題
前記従来技術によれば、液晶パネルは所謂「べた電極」
であり、光透過率は常にパネル全体で変化することにな
り、液晶パネルの任意の部分の光透過率のみ部分的に変
化されることは不可能であった。従って、被写体に部分
的に異常に高輝度な部分が存在すると光透過率はパネル
全面にわたって小さくなり、異常輝度部分以外の部分が
著しく暗い画面となってしまう。即ち、所謂「逆光補正
」ができないという欠点があった。(c) Problems to be Solved by the Invention According to the prior art, the liquid crystal panel has a so-called "solid electrode".
Therefore, the light transmittance always changes throughout the panel, and it is impossible to partially change the light transmittance of any part of the liquid crystal panel. Therefore, if there is an abnormally high brightness part in the subject, the light transmittance decreases over the entire panel, and the screen becomes extremely dark in areas other than the abnormally bright part. That is, there is a drawback that so-called "backlight correction" cannot be performed.
（ニ）課題を解決するための手段
本発明は、レンズ系と撮像素子間に配された光量調整用
の液晶パネルの各画素の光透過率を夫々独立に変化させ
ることを特徴とする特にこれらの画素を撮像素子の画素
に対応させ、この撮像素子の画業の各撮像出力レベルに
応じて液晶パネルの対応する各画素の光透過率を制御す
ることを特徴とする。(D) Means for Solving the Problems The present invention is characterized in that the light transmittance of each pixel of a liquid crystal panel for adjusting the amount of light arranged between a lens system and an image sensor is changed independently. The pixels of the liquid crystal panel are made to correspond to the pixels of the image sensor, and the light transmittance of each corresponding pixel of the liquid crystal panel is controlled in accordance with each image pickup output level of the image sensor.
（ホ）作用
本発明は上述の如く構成したので、撮像画面の１′１：
意の部分の絞りが制御可能であり、特に逆光補正効果を
得ることができる。(E) Function Since the present invention is constructed as described above, 1'1 of the imaging screen:
The diaphragm can be controlled at desired locations, and particularly backlight correction effects can be obtained.
（へ）実施例 以下、図面に従い本発明の実施例について説明する。(f) Example Embodiments of the present invention will be described below with reference to the drawings.
第１図は第１実施例のビデオカメラの回路ブロノク図で
ある。FIG. 1 is a circuit diagram of a video camera according to a first embodiment.
被写体（１）から出た光は、レンズ系（２）に入射さ！
して集光され、液晶パネル（３）を通って固体撮像素子
（ＣＣＤ）（，１）上に結像される。この結像された像
は、ＣＣＤ（−１）にて光電変換されて読み出され、信
号処理回路（５）にて撮像映像信号に変換されて後段の
Ａ／Ｄ変換器及びディジタル積分器と共に輝度レベル検
出回路（６）を溝底する選択回路（７）に供給される。The light emitted from the subject (1) enters the lens system (2)!
The light is focused, passes through a liquid crystal panel (3), and is imaged onto a solid-state image sensor (CCD) (,1). This formed image is photoelectrically converted and read out by the CCD (-1), converted into an imaged video signal by the signal processing circuit (5), and then processed together with the subsequent A/D converter and digital integrator. It is supplied to a selection circuit (7) which controls a brightness level detection circuit (6).
選択回路（７）は、第２図の如く撮像画面をＭ×Ｎ（第
２図ではＭ ＝ Ｎ ＝ ５ ）の複数の領域（Ａ１）
（Ａ２）・・・（Ａ２５）に分割して、この各領域内で
の撮像映像信号を時分割的に抜き取り、後段のＡ 、’
Ｄ変換器（ＰＩ）（Ｐ２）・・・（Ｐ２５）に出力す
る。従って、Ａ／Ｄ変換ａ＜ｐｌ＞には領域（Ａ１）内
の撮像映像信号が、同様にＡ／Ｄ変換器（Ｐ２）（Ｐ３
）・・・には夫々領域（Ａ２）（Ａ３）−内の撮像映像
信号が供給され、各Ａ／Ｄ変換器は所定のサンプリング
周期にてこの映像信号をＡ／Ｄ変換し、このＡ／Ｄ変換
値が後段のディジタル積分器（Ｑｌ）（Ｑ２）・・（Ｑ
２５）にてＩフィールド期間にわたって積算され、各領
域内の撮像映像信号の１７で一ルド分がディジタル積分
されることになり、この積分値が各領域の輝度レベルと
して制御信号作成回路（８）に出力される。The selection circuit (7) divides the imaging screen into multiple areas (A1) of M×N (M = N = 5 in Figure 2) as shown in Figure 2.
(A2)...(A25), and extracts the captured video signals in each area in a time-division manner, and then extracts the captured video signals in the subsequent stages A,'
Output to D converter (PI) (P2)...(P25). Therefore, the imaged video signal in the area (A1) is input to the A/D converter a<pl>, and the A/D converter (P2) (P3
)... are supplied with captured video signals in areas (A2), (A3)-, respectively, and each A/D converter performs A/D conversion on this video signal at a predetermined sampling period. Digital integrator (Ql) (Q2)...(Q
25) over the I field period, and one field of the captured video signal in each area is digitally integrated in 17, and this integrated value is used as the brightness level of each area by the control signal generation circuit (8). is output to.
液晶パネル（３）は複数の画Ｘ（最小単位）にて構成さ
れ、これらの画素の所定個の集合体を１つのブロックと
して、このブロックを撮像画面の１つの領域に対応させ
ることにより、液晶パネル（３）も第３図の如く５×５
の２５個のブロック（Ｂｌ）（Ｂ２）・・（Ｂ２５’）
が設定され、しかも各画素は液晶パネル駆動回路（９）
の駆動信号にて駆動され、その光透過率が夫々独立に制
御される。The liquid crystal panel (3) is composed of a plurality of pixels Panel (3) is also 5x5 as shown in Figure 3.
25 blocks (Bl) (B2)...(B25')
is set, and each pixel is connected to a liquid crystal panel drive circuit (9).
The light transmittance of each light transmittance is controlled independently.
制御信号作成回路（８）は各領域の輝度レベルに基づい
て、液晶パネル（３）の各画素の光透過率を制御する液
晶パネル制御信号をｆ１戒するものである。ここで、同
一ブロック内に存在する複数の画素については、全て同
一の光透過率となる様に制御信号が発せられる。更に詳
述すると、輝度レベルが高い領域はど、この領域に対応
するブロックの光透過率を小さくする様な制御信号が発
せられる。The control signal generation circuit (8) generates a liquid crystal panel control signal f1 for controlling the light transmittance of each pixel of the liquid crystal panel (3) based on the brightness level of each area. Here, a control signal is issued so that a plurality of pixels existing in the same block all have the same light transmittance. More specifically, in a region where the brightness level is high, a control signal is issued to reduce the light transmittance of the block corresponding to this region.
液晶パネル駆動回路（９）は、前記制御信号を受けて、
各画素に対して制御信号にて指定される光透過率を実現
する駆動信号を液晶パネル（３）に供給する。The liquid crystal panel drive circuit (9) receives the control signal, and
A drive signal is supplied to the liquid crystal panel (3) to achieve the light transmittance specified by the control signal for each pixel.
次に具体的に液晶パネル（３）による光量調整動作につ
いて説明する。Next, the light amount adjustment operation by the liquid crystal panel (3) will be specifically explained.
第４図の如き逆光状態の撮像画面を考慮した場合、即ち
異常高輝度部である太陽（Ｓ）が領域（Ａ７）に入り込
んだ場合、領域（Ａ７）の輝度レベルは著しく高く、次
いでこの周囲の領域（ＡＩ）（Ａ２）（Ａ３）（Ａ６）
（Ａ８）（Ａｌｌ）（Ａ１２）（Ａ１３）の輝度レベル
が比較的高くなる。そこで、領域（Ａ７）に対応するプ
ロ・Ｉり（Ｂ７）の光透過率を極端に小さくし、領域（
ＡＩ）（Ａ２）（へ３）（Ａ６）（Ａ８）（Ａｌｌ）（
Ａ１２）（Ａ１３）に対応するブロノク（Ｂ１）（Ｂ２
）（Ｂ３）（Ｂ６）（Ｂ８）（Ｂｌｌ）（Ｂ１２）（Ｂ
１３）の光透過率を若干小さくし、その他の領域に対応
するブロックの光透過率を大きく維持する様な制御信号
が制御信号作成回路（８）より発せられる。この制御信
号に基いて液晶パネル（３）が駆動し、第５図の如くブ
ロック（Ｂ７）の光透過率が極端に低く、ブロック（Ｂ
ｌ）（Ｂ２）（Ｂ３）（Ｂ６）（Ｂ８）（８１１）（Ｂ
１２）（Ｂ１３）の光透過率が若干低くなって太陽から
の入射光量が抑えられ、主要被写体（１）にとっての逆
光補正が為される。When considering a backlit imaging screen as shown in Fig. 4, that is, when the sun (S), which is an abnormally bright area, enters the area (A7), the brightness level of the area (A7) is extremely high, and then the surrounding area Area (AI) (A2) (A3) (A6)
The brightness levels of (A8) (All) (A12) (A13) become relatively high. Therefore, the light transmittance of the professional light (B7) corresponding to the area (A7) is made extremely small, and the area (A7) is
AI) (A2) (to3) (A6) (A8) (All) (
Bronok (B1) (B2) corresponding to A12) (A13)
) (B3) (B6) (B8) (Bll) (B12) (B
A control signal generating circuit (8) generates a control signal that slightly reduces the light transmittance of block 13) and maintains a large light transmittance of blocks corresponding to other areas. The liquid crystal panel (3) is driven based on this control signal, and as shown in FIG. 5, the light transmittance of the block (B7) is extremely low.
l) (B2) (B3) (B6) (B8) (811) (B
12) The light transmittance of (B13) is slightly lowered, the amount of incident light from the sun is suppressed, and backlight correction for the main subject (1) is performed.
上述の実施例では、液晶パネル（３）は予め複数の画素
の集合体であるブロックにて分割され、撮像画面の輝度
分布に応じてブロック毎の光透過率を制御する様に構成
したが、第６図の如くブロンクを設定せずに画素単位で
光透過率を制御することも可能である。第６図の第２実
施例では、撮像画面に設定された領域の個々の大きさを
極端に小さくし、その個数を液晶パネル（３）の全画素
数と−・致させて、領域と画素を１＝１に対応させてい
る。In the above-described embodiment, the liquid crystal panel (3) is divided in advance into blocks, which are aggregates of a plurality of pixels, and is configured to control the light transmittance of each block according to the luminance distribution of the imaging screen. It is also possible to control the light transmittance on a pixel basis without setting broncs as shown in FIG. In the second embodiment shown in FIG. 6, the size of each area set on the imaging screen is made extremely small, and the number of areas is made equal to the total number of pixels of the liquid crystal panel (3). corresponds to 1=1.
そして輝度レベル検出回路（１０）は第１図と同様に選
択回路と？！ｉ！数のＡ／Ｄ変換器及びデ／ジタル積分
器によりＨＲ戊されて、上述の如く細分化された領域毎
の輝度レベルが制御信号作成回路（１１）に入力される
。And the brightness level detection circuit (10) is a selection circuit as in FIG. ! i! The brightness level of each subdivided area is inputted to the control signal generation circuit (11) after the HR conversion is performed by several A/D converters and digital integrators.
制御信号作成回路（１１）は、液晶パネル（３）の各画
素の光透過率を、これらの画素にｌ：１に対応する各領
域の輝度レベルに応じて制御し、輝度レベルが高くなる
程に対応する各画素の光透過率を低くして逆光補正を為
す。The control signal generation circuit (11) controls the light transmittance of each pixel of the liquid crystal panel (3) according to the brightness level of each area corresponding to l:1 for these pixels, and the higher the brightness level is, the more the light transmittance of each pixel of the liquid crystal panel (3) increases. Backlight correction is performed by lowering the light transmittance of each pixel corresponding to .
この様に光透過率をブロンク毎に一律に変化させる第１
実施例に比べ、画業４Ｌ位で変化させられる第２実施例
では、より木目の細かい逆光補正が可能となる。In this way, the first method is to uniformly change the light transmittance for each bronc.
Compared to the embodiment, in the second embodiment, which is changed at about 4L, it is possible to perform backlight correction with finer grain.
次に液晶パネルの各々の画素が独立にその透過率を制御
できる点を利用して、撮像画面に様々な特殊効果を持た
せる第７図の第３実施例について説明する。この第３実
施例は逆光補正を目的とするものではないので、液晶パ
ネルの光透過率の制御信号を撮像映像信号から作成する
のではなく、パターン発生回路（２０〉にて作成するこ
とを特徴とする。即ち、パターン発生回路（２０）では
、撮像画面のどの領域の輝度レベルをどの程度上昇ある
いは降下させるかを撮像画面パターン上に具体的に指定
し、これに応じて領域に対応する画素の光透過率が決定
されて制御信号が作成される。例えば、撮像画面のある
任意の部分以外の光透過率を降下させることにより、任
意の部分のみが窓が開いた様な、即ちこの任意の部分を
除く部分だけがマスクがかかった様な効果を出すことが
できる。Next, a third embodiment shown in FIG. 7 will be described in which various special effects are given to the imaging screen by taking advantage of the fact that each pixel of the liquid crystal panel can independently control its transmittance. Since this third embodiment is not intended for backlight correction, the control signal for the light transmittance of the liquid crystal panel is not created from the captured video signal, but is created by the pattern generation circuit (20). That is, the pattern generation circuit (20) specifically specifies on the imaging screen pattern how much the brightness level of the area of the imaging screen is to be increased or decreased, and the pixels corresponding to the area are specified in accordance with this. The light transmittance of the image pickup screen is determined and a control signal is created.For example, by lowering the light transmittance of areas other than a certain part of the imaging screen, it is possible to create a window that is open only in the arbitrary part. It is possible to create a mask-like effect only on the part excluding the part.
また、パターン発生回路（２０）にて各領域の光透過率
を時間的に変化させることによりフェードイン、フェー
ドアウト効果を出したり、幕が開いたり閉じたりするワ
イプ効果を出すことが可能となる。In addition, by temporally changing the light transmittance of each area in the pattern generation circuit (20), it is possible to create a fade-in, fade-out effect, or a wipe effect in which a curtain opens and closes.
尚、前記第１あるいは第２実施例の構成を用いれば、従
来例（特開昭６２−１６９５８７号）に示される様に映
像信号を積分して、その結果により：夜具パネル全体の
光透過率を均一に制御したり、映像信号の特定の領域に
着目し、その部分の光量によって液晶パネル全体の透過
率を均一に制御する構成も勿論可能である。また、上述
の各実施例の構成を適時切り換えて使用する事も可能で
ある。Incidentally, if the configuration of the first or second embodiment is used, the video signal is integrated as shown in the conventional example (Japanese Patent Laid-Open No. 62-169587), and the result is: the light transmittance of the entire nightgown panel. Of course, it is also possible to uniformly control the transmittance of the entire liquid crystal panel by focusing on a specific region of the video signal and controlling the transmittance of the entire liquid crystal panel by controlling the amount of light in that region. Further, it is also possible to switch and use the configurations of the respective embodiments described above as needed.
更に、ＣＣＤに代えて撮＠管を用いたカメラシステムに
本発明を用いた場合には、撮像管の焼き付は防止の効果
も得られる。Furthermore, when the present invention is applied to a camera system that uses a camera tube instead of a CCD, it is possible to prevent burn-in of the camera tube.
（トン 発明の効果
上述の如く本発明によれば、液晶パネルを配設する簡単
なＦＩＩＩａにより、自動逆光補正やマスク、フェード
イン等の映像特殊効果を得ることが容易に可能となる。Effects of the Invention As described above, according to the present invention, special video effects such as automatic backlight correction, masking, and fade-in can be easily obtained using a simple FIIIa provided with a liquid crystal panel.
第１図乃至第５図は本発明の第１実ｍ例に係り、第１図
は回路ブロック図、第２図、第３図は領域及びプロ・ノ
クの設定説明図、第４図は撮像画面を示す図、第５図は
光透過率の変化を示す図である。
また、
第６図は本発明の第２実施例の回路
ブロック図、
第７図は第３実施例の回路ブロック
図である。
第２図
（２）・・・レンズ系、
（４）・・・ＣＣＤ、
（３）・・・液晶パ
ネル1 to 5 relate to the first practical example of the present invention, in which FIG. 1 is a circuit block diagram, FIGS. 2 and 3 are explanatory diagrams of areas and settings of the pro-noc, and FIG. 4 is an imaging diagram. FIG. 5, which is a diagram showing the screen, is a diagram showing changes in light transmittance. Further, FIG. 6 is a circuit block diagram of a second embodiment of the present invention, and FIG. 7 is a circuit block diagram of a third embodiment. Figure 2 (2)...Lens system, (4)...CCD, (3)...Liquid crystal panel
Claims (2)
段と、 前記レンズ系と前記撮像手段間に配され、光透過率が独
立に制御可能な複数の画素を有する液晶パネルを備える
撮像装置。(1) a lens system that collects light and forms an image on an image sensor; an imaging device that captures the formed image and outputs a captured video signal; disposed between the lens system and the imaging device; An imaging device including a liquid crystal panel having a plurality of pixels whose light transmittance can be independently controlled.
応させ、前記撮像素子の画素の各撮像出力レベルに応じ
て前記液晶パネルの対応する画素の光透過率を制御する
ことを特徴とする請求項１記載の撮像装置。(2) The pixels of the liquid crystal panel are made to correspond to the pixels of the image sensor, and the light transmittance of the corresponding pixels of the liquid crystal panel is controlled according to the imaging output level of each pixel of the image sensor. The imaging device according to claim 1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1206158A JPH0370274A (en) | 1989-08-09 | 1989-08-09 | Image pickup device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1206158A JPH0370274A (en) | 1989-08-09 | 1989-08-09 | Image pickup device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0370274A true JPH0370274A (en) | 1991-03-26 |
Family
ID=16518763
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1206158A Pending JPH0370274A (en) | 1989-08-09 | 1989-08-09 | Image pickup device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0370274A (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5995145A (en) * | 1991-04-30 | 1999-11-30 | Sony Broadcast & Communications Limited | Image capture apparatus for selectively causing a stepped reduction in video image signal values |
| US6256066B1 (en) * | 1996-06-28 | 2001-07-03 | Matsushita Electric Industrial Co., Ltd. | High-resolution image pickup method and apparatus therefor |
| US6392687B1 (en) * | 1997-05-08 | 2002-05-21 | Be Here Corporation | Method and apparatus for implementing a panoptic camera system |
| US6690424B1 (en) * | 1997-03-19 | 2004-02-10 | Sony Corporation | Exposure control apparatus for controlling the exposure of an image pickup plane in a camera |
| US6999126B2 (en) * | 2001-09-17 | 2006-02-14 | Mazzapica C Douglas | Method of eliminating hot spot in digital photograph |
| WO2006033360A1 (en) * | 2004-09-21 | 2006-03-30 | Nikon Corporation | Mobile information device |
| US7245325B2 (en) * | 2000-03-17 | 2007-07-17 | Fujifilm Corporation | Photographing device with light quantity adjustment |
| US7891826B2 (en) | 2004-09-21 | 2011-02-22 | Nikon Corporation | Projector |
-
1989
- 1989-08-09 JP JP1206158A patent/JPH0370274A/en active Pending
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5995145A (en) * | 1991-04-30 | 1999-11-30 | Sony Broadcast & Communications Limited | Image capture apparatus for selectively causing a stepped reduction in video image signal values |
| US6256066B1 (en) * | 1996-06-28 | 2001-07-03 | Matsushita Electric Industrial Co., Ltd. | High-resolution image pickup method and apparatus therefor |
| US6690424B1 (en) * | 1997-03-19 | 2004-02-10 | Sony Corporation | Exposure control apparatus for controlling the exposure of an image pickup plane in a camera |
| US6392687B1 (en) * | 1997-05-08 | 2002-05-21 | Be Here Corporation | Method and apparatus for implementing a panoptic camera system |
| US7245325B2 (en) * | 2000-03-17 | 2007-07-17 | Fujifilm Corporation | Photographing device with light quantity adjustment |
| US6999126B2 (en) * | 2001-09-17 | 2006-02-14 | Mazzapica C Douglas | Method of eliminating hot spot in digital photograph |
| WO2006033360A1 (en) * | 2004-09-21 | 2006-03-30 | Nikon Corporation | Mobile information device |
| US7891826B2 (en) | 2004-09-21 | 2011-02-22 | Nikon Corporation | Projector |
| US8147066B2 (en) | 2004-09-21 | 2012-04-03 | Nikon Corporation | Portable information device having a projector and an imaging device |
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