JP2005346027A - カメラフラッシュ用led制御装置 - Google Patents
カメラフラッシュ用led制御装置 Download PDFInfo
- Publication number
- JP2005346027A JP2005346027A JP2004270502A JP2004270502A JP2005346027A JP 2005346027 A JP2005346027 A JP 2005346027A JP 2004270502 A JP2004270502 A JP 2004270502A JP 2004270502 A JP2004270502 A JP 2004270502A JP 2005346027 A JP2005346027 A JP 2005346027A
- Authority
- JP
- Japan
- Prior art keywords
- led
- terminal
- current
- control unit
- resistor
- 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.)
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Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
- G03B15/00—Special procedures for taking photographs; Apparatus therefor
- G03B15/02—Illuminating scene
- G03B15/03—Combinations of cameras with lighting apparatus; Flash units
- G03B15/05—Combinations of cameras with electronic flash apparatus; Electronic flash units
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
- H04N23/56—Cameras or camera modules comprising electronic image sensors; Control thereof provided with illuminating means
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
- H04N23/60—Control of cameras or camera modules
- H04N23/65—Control of camera operation in relation to power supply
- H04N23/651—Control of camera operation in relation to power supply for reducing power consumption by affecting camera operations, e.g. sleep mode, hibernation mode or power off of selective parts of the camera
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
- G03B2215/00—Special procedures for taking photographs; Apparatus therefor
- G03B2215/05—Combinations of cameras with electronic flash units
- G03B2215/0564—Combinations of cameras with electronic flash units characterised by the type of light source
- G03B2215/0567—Solid-state light source, e.g. LED, laser
Landscapes
- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Studio Devices (AREA)
- Exposure Control For Cameras (AREA)
- Stroboscope Apparatuses (AREA)
Abstract
【解決手段】 LED11と、LED11に対してLED11の定格電流以下の電流を持続的に供給する低電流連続制御部13と、LED11に対してLED11の定格電流より高い電流を所定時間に亘って供給する高電流パルス制御部14、15と、LED11を制御するために低電流連続制御部13と高電流パルス制御部14、15とのうちの一方を選択するモード選択部16とを備えたカメラフラッシュ用LED制御装置を提供する。本発明によると、不要な電流の消耗を防止でき、LED11の信頼性劣化を防止でき、より明るい画質の映像を得ることができる。
【選択図】 図1
Description
12 バイアス回路部
13 低電流連続制御部
14 スイッチング回路制御部
14,15 高電流パルス制御部
15 スイッチング回路部
16 モード選択部
42,52 シャッター
43,53 MPU
44,55 LED制御部
45,56 レンズ制御駆動部
46,57 レンズ
47,58 メモリ
54 カメラ用DSP
R1,R2,R5,R6 抵抗器
R3 第1抵抗
R4 第2抵抗
A 第1端子
B 第2端子
C1 キャパシタ
T1 PNPトランジスタ
T2 NPNトランジスタ
Claims (7)
- LEDと、
前記LEDに対して、前記LEDの定格電流以下の電流を持続的に供給する低電流連続制御部と、
前記LEDに対して、前記LEDの定格電流より高い電流を所定時間に亘って供給する高電流パルス制御部と、
前記LEDを制御するために、前記低電流連続制御部及び前記高電流パルス制御部のうちの一方を選択するモード選択部と、
を備えたカメラフラッシュ用LED制御装置。 - 電源に一端が接続されたLEDと、
第1端子と第2端子とを有し、前記第1端子と前記第2端子とのうちの一方をグランドと接続するモード選択部と、
前記第1端子と前記LEDの他端とに対して両端が電気的に接続される低電流連続制御部と、
前記LEDの他端を所定時間に亘ってグランドと接続するスイッチング回路部と、前記第2端子に一端が接続され、前記所定時間を制御する信号を前記スイッチング回路部に提供するスイッチング回路制御部とを有する高電流パルス制御部と、
を備えたカメラフラッシュ用LED制御装置。 - 前記高電流パルス制御部が供給する電流は、前記LEDの定格電流の4倍以下であること、
を特徴とする請求項1又は2に記載のカメラフラッシュ用LED制御装置。 - 前記所定時間は、10ms以下であること、
を特徴とする請求項1から3のいずれか一項に記載のカメラフラッシュ用LED制御装置。 - 前記低電流連続制御部は、当該低電流連続制御部の両端が前記第1端子と前記LEDの他端とに電気的に接続された抵抗器であること、
を特徴とする請求項2から4のいずれか一項に記載のカメラフラッシュ用LED制御装置。 - 前記スイッチング回路制御部は、
一端が前記電源に電気的に接続され、他端が前記第2端子に電気的に接続された第1抵抗と、
一端が前記電源に電気的に接続された第2抵抗と、前記第2抵抗の他端と前記第2端子とに両端が電気的に接続されたキャパシタと
を備えたRC充電回路であること、
を特徴とする請求項2から5のいずれか一項に記載のカメラフラッシュ用LED制御装置。 - 前記スイッチング回路部は、
前記電源にエミッタ端が接続され、前記第2抵抗の他端にベース端が接続されるPNPトランジスタと、
前記LEDの他端にコレクタ端が接続され、前記PNPトランジスタのコレクタ端にベース端が接続され、グランドにエミッタ端が接続されるNPNトランジスタと、
を備えたことを特徴とする請求項6に記載のカメラフラッシュ用LED制御装置。
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
KR1020040039093A KR100593910B1 (ko) | 2004-05-31 | 2004-05-31 | 카메라 플래쉬용 led 구동 장치 |
Publications (2)
Publication Number | Publication Date |
---|---|
JP2005346027A true JP2005346027A (ja) | 2005-12-15 |
JP4015654B2 JP4015654B2 (ja) | 2007-11-28 |
Family
ID=35425378
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP2004270502A Expired - Fee Related JP4015654B2 (ja) | 2004-05-31 | 2004-09-16 | カメラフラッシュ用led制御装置 |
Country Status (3)
Country | Link |
---|---|
US (1) | US7236697B2 (ja) |
JP (1) | JP4015654B2 (ja) |
KR (1) | KR100593910B1 (ja) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2010090342A1 (ja) * | 2009-02-09 | 2010-08-12 | 日本電気株式会社 | カメラ機能付き携帯端末、フラッシュライト制御方法およびフラッシュライト制御プログラム |
Families Citing this family (16)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20060114314A1 (en) * | 2004-11-19 | 2006-06-01 | Sony Ericsson Mobile Communications Ab | Picture/video telephony for a push-to-talk wireless communications device |
US7414370B2 (en) | 2006-02-03 | 2008-08-19 | Honeywell International Inc. | Increasing reliability of operation of light emitting diode arrays at higher operating temperatures and its use in the lamps of automobiles |
US7634191B2 (en) * | 2006-06-21 | 2009-12-15 | Sony Ericsson Mobile Communications Ab | Portable communication device equipped with an electronic flash having a LED ignition device |
KR100856291B1 (ko) | 2006-11-14 | 2008-09-03 | 삼성전기주식회사 | 가변 플래쉬를 갖는 휴대 카메라 장치 |
ES2350621T3 (es) * | 2007-09-28 | 2011-01-25 | Research In Motion Limited | Un método y un aparato para maximizar el flash sostenible de un dispositivo electrónico portátil de mano. |
US7777809B2 (en) * | 2007-09-28 | 2010-08-17 | Research In Motion Limited | Method and apparatus for maximizing the sustainable flash of a handheld portable electronic device |
US20090127342A1 (en) * | 2007-11-20 | 2009-05-21 | Symbol Technologies, Inc. | Imaging Bar Code Reader with Illumination Control System |
TWI386748B (zh) | 2008-07-18 | 2013-02-21 | E Pin Optical Industry Co Ltd | Camera with an array of light emitting diode (LED) flash |
US7829831B2 (en) * | 2008-09-05 | 2010-11-09 | Sony Ericsson Mobile Communications Ab | Control of output voltage provided to a flash unit |
US8698949B2 (en) * | 2010-01-08 | 2014-04-15 | Hand Held Products, Inc. | Terminal having plurality of operating modes |
KR101421963B1 (ko) * | 2010-01-25 | 2014-07-24 | 삼성전자주식회사 | 카메라의 led 플래쉬 모듈 및 카메라 장치 |
US8771085B1 (en) | 2010-08-06 | 2014-07-08 | Arthur C. Clyde | Modular law enforcement baton |
US10263573B2 (en) * | 2016-08-30 | 2019-04-16 | Macom Technology Solutions Holdings, Inc. | Driver with distributed architecture |
US11602922B2 (en) | 2017-07-06 | 2023-03-14 | Lg Chem, Ltd. | Composite material |
US10996543B2 (en) * | 2018-09-24 | 2021-05-04 | Light & Motion Industries | Combination high power LED strobe and continuous light |
CN112767872A (zh) * | 2019-11-01 | 2021-05-07 | 京东方科技集团股份有限公司 | 像素驱动芯片及其驱动方法、显示装置 |
Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0463161U (ja) * | 1990-10-04 | 1992-05-29 | ||
JPH07140377A (ja) * | 1993-11-18 | 1995-06-02 | Olympus Optical Co Ltd | 測距装置を有するカメラ |
JP2000147615A (ja) * | 1998-11-16 | 2000-05-26 | Matsushita Electric Ind Co Ltd | 撮像装置 |
JP2003174587A (ja) * | 2001-12-07 | 2003-06-20 | Seiko Precision Inc | 撮像装置および携帯電子機器 |
JP2003307771A (ja) * | 2002-02-15 | 2003-10-31 | Fuji Photo Film Co Ltd | カメラの発光装置及び半導体発光素子 |
JP2003338973A (ja) * | 2002-03-15 | 2003-11-28 | Sharp Corp | 撮影機能を有した携帯機器 |
Family Cites Families (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5010412A (en) * | 1988-12-27 | 1991-04-23 | The Boeing Company | High frequency, low power light source for video camera |
US4912499A (en) * | 1989-01-17 | 1990-03-27 | Eastman Kodak Company | Camera apparatus |
JPH0463161A (ja) | 1990-06-29 | 1992-02-28 | Suzuki Motor Corp | 塗装装置 |
JP2000275707A (ja) * | 1999-03-24 | 2000-10-06 | Fuji Photo Film Co Ltd | ストロボ装置 |
JP4394359B2 (ja) * | 2003-02-17 | 2010-01-06 | Hoya株式会社 | 内視鏡の光源装置 |
JP2004309710A (ja) * | 2003-04-04 | 2004-11-04 | Stanley Electric Co Ltd | 写真撮影用光源装置 |
US7071633B2 (en) * | 2003-07-10 | 2006-07-04 | Trafcon Industries, Inc. | Burst pulse circuit for signal lights and method |
-
2004
- 2004-05-31 KR KR1020040039093A patent/KR100593910B1/ko not_active IP Right Cessation
- 2004-09-08 US US10/935,360 patent/US7236697B2/en not_active Expired - Fee Related
- 2004-09-16 JP JP2004270502A patent/JP4015654B2/ja not_active Expired - Fee Related
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0463161U (ja) * | 1990-10-04 | 1992-05-29 | ||
JPH07140377A (ja) * | 1993-11-18 | 1995-06-02 | Olympus Optical Co Ltd | 測距装置を有するカメラ |
JP2000147615A (ja) * | 1998-11-16 | 2000-05-26 | Matsushita Electric Ind Co Ltd | 撮像装置 |
JP2003174587A (ja) * | 2001-12-07 | 2003-06-20 | Seiko Precision Inc | 撮像装置および携帯電子機器 |
JP2003307771A (ja) * | 2002-02-15 | 2003-10-31 | Fuji Photo Film Co Ltd | カメラの発光装置及び半導体発光素子 |
JP2003338973A (ja) * | 2002-03-15 | 2003-11-28 | Sharp Corp | 撮影機能を有した携帯機器 |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2010090342A1 (ja) * | 2009-02-09 | 2010-08-12 | 日本電気株式会社 | カメラ機能付き携帯端末、フラッシュライト制御方法およびフラッシュライト制御プログラム |
CN102308255B (zh) * | 2009-02-09 | 2014-11-26 | 日本电气株式会社 | 带有相机功能的便携式终端、闪光灯控制方法和闪光灯控制程序 |
Also Published As
Publication number | Publication date |
---|---|
JP4015654B2 (ja) | 2007-11-28 |
US7236697B2 (en) | 2007-06-26 |
US20050265709A1 (en) | 2005-12-01 |
KR20050113939A (ko) | 2005-12-05 |
KR100593910B1 (ko) | 2006-06-30 |
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