CN109445232B - Novel camera flash HUB device and working method thereof - Google Patents
Novel camera flash HUB device and working method thereof Download PDFInfo
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- CN109445232B CN109445232B CN201811653273.0A CN201811653273A CN109445232B CN 109445232 B CN109445232 B CN 109445232B CN 201811653273 A CN201811653273 A CN 201811653273A CN 109445232 B CN109445232 B CN 109445232B
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- hot shoe
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- 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
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B20/00—Energy efficient lighting technologies, e.g. halogen lamps or gas discharge lamps
- Y02B20/40—Control techniques providing energy savings, e.g. smart controller or presence detection
Abstract
The invention relates to a novel camera flash HUB device and a working method thereof, wherein the novel camera flash HUB device comprises hot shoes of eight flash lamps with the same brand, a camera flash lamp connecting terminal with 4 hot shoe contacts, four analog switches with the same model, a singlechip and a digital comparator; after the device is electrified, the singlechip reads the states of all the flashlights and transmits the states to a group of comparison data input ends (original states) of the numerical comparator; meanwhile, the 4 contact states of the camera hot shoe are connected to the other group of input data ends of the numerical comparator; under the condition of no flash, the two groups of data are equal, when a shutter of the camera is pressed down, the data on the hot shoe of the flash lamp can be changed, so that the two groups of data are unequal, and an interrupt request is sent to the MCU. After the MCU responds to the interrupt request signal, judging that normal flashing is finished, and enabling the camera hot shoe to finish the selection of another flashing lamp through the MCU. The invention adopts a plurality of flash lamps to circularly connect the hot boots of the camera, thereby improving the return speed of the flash lamps.
Description
Technical Field
The invention relates to the field of photographic equipment, in particular to a novel camera flash HUB device and a working method thereof.
Background
With the rapid development of electronic technology, more and more photographic equipment enters common families, and the number of the photographic equipment in the professional field is greatly increased. Photography and videography are photo arts, and good equipment must also have good light. The external flash lamp can be turned in the current direction, so that the output power is high, and the high-grade camera and the flash lamp support high-speed light filling, so that the external flash lamp is most widely used. To achieve such as TTL control, various manufacturers have set various contacts for the hot shoe of the set top for controlling various parameters of the flash. However, the current flash lamp system has a problem that the continuous shooting speed of the high-end camera can reach 10 pieces per second, for example, the D500 of Nikon reaches 11FPS, and the low-end camera can also reach about 3 FPS. But the return current of the flash is typically in seconds. Even a few seconds are required in case of insufficient battery. It can be seen that when continuously shooting at high speed, the flash cannot keep up with the continuously shooting speed at all, which in many cases can seriously affect photographic creation or news era.
Disclosure of Invention
Therefore, the invention aims to provide a novel camera flash HUB device and a working method thereof, which can improve the flash back speed and realize the normal operation of a camera under the condition of high-speed continuous shooting.
The invention is realized by adopting the following scheme: the novel camera flash HUB device comprises a first flash hot shoe, a second flash hot shoe, a third flash hot shoe, a fourth flash hot shoe, a fifth flash hot shoe, a sixth flash hot shoe, a seventh flash hot shoe, an eighth flash hot shoe, a first hot shoe contact, a second hot shoe contact, a third hot shoe contact, a fourth hot shoe contact, a first analog switch, a second analog switch, a third analog switch, a fourth analog switch, a singlechip and a numerical comparator;
the eight signal ends of the first analog switch are respectively connected with the first path control signal ends of the first flash hot shoe, the second flash hot shoe, the third flash hot shoe, the fourth flash hot shoe, the fifth flash hot shoe, the sixth flash hot shoe, the seventh flash hot shoe and the eighth flash hot shoe in sequence; the eight signal ends of the second analog switch are respectively connected with the second path control signal ends of the first flash hot shoe, the second flash hot shoe, the third flash hot shoe, the fourth flash hot shoe, the fifth flash hot shoe, the sixth flash hot shoe, the seventh flash hot shoe and the eighth flash hot shoe in sequence; the eight signal ends of the third analog switch are respectively connected with the third control signal ends of the first flash hot shoe, the second flash hot shoe, the third flash hot shoe, the fourth flash hot shoe, the fifth flash hot shoe, the sixth flash hot shoe, the seventh flash hot shoe and the eighth flash hot shoe in sequence; the eight signal ends of the fourth analog switch are respectively connected with the fourth path control signal ends of the first flash hot shoe, the second flash hot shoe, the third flash hot shoe, the fourth flash hot shoe, the fifth flash hot shoe, the sixth flash hot shoe, the seventh flash hot shoe and the eighth flash hot shoe in sequence; the first flash hot shoe, the second flash hot shoe, the third flash hot shoe, the fourth flash hot shoe, the fifth flash hot shoe, the sixth flash hot shoe, the seventh flash hot shoe and the eighth flash hot shoe are externally connected with a flash lamp with the same model;
the first control signal end of the first analog switch is respectively connected with the first control signal ends of the second analog switch, the third analog switch and the fourth analog switch; the second control signal end of the first analog switch is respectively connected with the second control signal ends of the second analog switch, the third analog switch and the fourth analog switch;
the third control signal end of the first analog switch is respectively connected with the third control signal ends of the second analog switch, the third analog switch and the fourth analog switch; the fourth control signal end of the first analog switch is respectively connected with the fourth control signal ends of the second analog switch, the third analog switch and the fourth analog switch; the first analog switch, the second analog switch, the third analog switch and the fourth analog switch are electrically connected with the single chip microcomputer and used for completing the selection of the four analog switch channels; the singlechip is electrically connected with the numerical comparator and is used for sending data to the numerical comparator and receiving an interrupt request signal sent by the numerical comparator;
the first hot shoe contact is connected with the output end of the first analog switch; the second hot shoe contact is connected with the output end of the second analog switch; the third hot shoe contact is connected with the output end of the third analog switch; the fourth hot shoe contact is connected with the output end of the fourth analog switch; the first hot shoe contact, the second hot shoe contact, the third hot shoe contact and the fourth hot shoe contact are also respectively and sequentially connected with four comparison data input ends of the numerical comparator, and are used for providing current state signals of the currently selected flash lamp; the first hot shoe contact, the second hot shoe contact, the third hot shoe contact and the fourth hot shoe contact are externally connected with a camera.
Further, the singlechip is of the type AT89C4051.
Further, the analog switches adopted by the first analog switch, the second analog switch, the third analog switch and the fourth analog switch are the same in model number and are all CD4051.
Further, the first flash hot shoe, the second flash hot shoe, the third flash hot shoe, the fourth flash hot shoe, the fifth flash hot shoe, the sixth flash hot shoe, the seventh flash hot shoe and the eighth flash hot shoe adopt the same type of flash hot shoe.
Further, the number comparator is of the type 74HC85.
Further, the same model of flash lamps are adopted in the same model.
Further, the invention also provides a working method based on the novel camera flash HUB device, which comprises the following steps:
step S1, after the device is electrified, the singlechip controls the first analog switch, the second analog switch, the third module switch and the fourth analog switch to complete the selection of the four analog switch channels, further complete the selection of eight flash lamp hot shoes, sequentially read the states of eight flash lamps connected with the eight flash lamp hot shoes, randomly select a group of flash lamps with power-back completion, and transmit the states of the selected flash lamps to the numerical comparator;
s2, the first hot shoe contact, the second hot shoe contact, the third hot shoe contact and the fourth hot shoe contact are respectively connected with four comparison data input ends of the numerical comparator in sequence and used for providing current state signals of currently selected flash lamps;
step S3, before the shutter of the camera is pressed, in the state that the flash lamp is powered back, the data transmitted to the numerical comparator by the singlechip in the step S1 are equal to the data transmitted to the numerical comparator by the four hot shoe contacts, and the numerical comparator outputs a high level at the moment; when the camera shutter is pressed, the data transmitted to the numerical comparator by the four hot shoe contacts are changed; the data transmitted to the numerical comparator by the four hot shoe contacts in the step S2 are unequal to the data transmitted to the numerical comparator by the singlechip in the step S1, the numerical comparator outputs a low level to generate falling edge jump, and the numerical comparator sends an interrupt request signal to the singlechip;
step S4, after receiving the interrupt request signal, the singlechip completes one-time flashing; reading the state of the next set of hot shoe contacts through the singlechip again, judging whether normal flashing is completed according to the state of the contact signals, and enabling a flash lamp which just completes flashing to enter a power-back state to prepare for the next flashing; meanwhile, the four hot shoe contacts are controlled to complete the selection of another flash lamp with complete power return.
Compared with the prior art, the invention has the following beneficial effects:
the hot boots of the camera are circularly connected by a plurality of flash lamps, so that the power return speed of the flash lamps is improved, and the normal operation of the camera under the high-speed continuous shooting condition is realized.
Drawings
Fig. 1 is a circuit diagram of a control principle according to an embodiment of the present invention.
Detailed Description
The invention will be further described with reference to the accompanying drawings and examples.
As shown in fig. 1, the present embodiment provides a novel camera flash HUB device, including a first flash hot shoe, a second flash hot shoe, a third flash hot shoe, a fourth flash hot shoe, a fifth flash hot shoe, a sixth flash hot shoe, a seventh flash hot shoe, an eighth flash hot shoe, a first hot shoe contact, a second hot shoe contact, a third hot shoe contact, a fourth hot shoe contact, a first analog switch, a second analog switch, a third analog switch, a fourth analog switch, a single chip microcomputer, and a digital comparator;
the eight signal ends of the first analog switch are respectively connected with the first path control signal ends of the first flash hot shoe, the second flash hot shoe, the third flash hot shoe, the fourth flash hot shoe, the fifth flash hot shoe, the sixth flash hot shoe, the seventh flash hot shoe and the eighth flash hot shoe in sequence; the eight signal ends of the second analog switch are respectively connected with the second path control signal ends of the first flash hot shoe, the second flash hot shoe, the third flash hot shoe, the fourth flash hot shoe, the fifth flash hot shoe, the sixth flash hot shoe, the seventh flash hot shoe and the eighth flash hot shoe in sequence; the eight signal ends of the third analog switch are respectively connected with the third control signal ends of the first flash hot shoe, the second flash hot shoe, the third flash hot shoe, the fourth flash hot shoe, the fifth flash hot shoe, the sixth flash hot shoe, the seventh flash hot shoe and the eighth flash hot shoe in sequence; the eight signal ends of the fourth analog switch are respectively connected with the fourth path control signal ends of the first flash hot shoe, the second flash hot shoe, the third flash hot shoe, the fourth flash hot shoe, the fifth flash hot shoe, the sixth flash hot shoe, the seventh flash hot shoe and the eighth flash hot shoe in sequence; the first flash hot shoe, the second flash hot shoe, the third flash hot shoe, the fourth flash hot shoe, the fifth flash hot shoe, the sixth flash hot shoe, the seventh flash hot shoe and the eighth flash hot shoe are externally connected with a flash lamp with the same model;
the first control signal end of the first analog switch is respectively connected with the first control signal ends of the second analog switch, the third analog switch and the fourth analog switch; the second control signal end of the first analog switch is respectively connected with the second control signal ends of the second analog switch, the third analog switch and the fourth analog switch;
the third control signal end of the first analog switch is respectively connected with the third control signal ends of the second analog switch, the third analog switch and the fourth analog switch; the fourth control signal end of the first analog switch is respectively connected with the fourth control signal ends of the second analog switch, the third analog switch and the fourth analog switch; the first analog switch, the second analog switch, the third analog switch and the fourth analog switch are all electrically connected with the single chip; the four analog switch channels are used for completing the selection of the four analog switch channels; the singlechip is electrically connected with the numerical comparator and is used for sending data to the numerical comparator and receiving an interrupt request signal sent by the numerical comparator;
the first hot shoe contact is connected with the output end of the first analog switch; the second hot shoe contact is connected with the output end of the second analog switch; the third hot shoe contact is connected with the output end of the third analog switch; the fourth hot shoe contact is connected with the output end of the fourth analog switch; the first hot shoe contact, the second hot shoe contact, the third hot shoe contact and the fourth hot shoe contact are also respectively and sequentially connected with four comparison data input ends of the numerical comparator, and are used for providing current state signals of the currently selected flash lamp; the first hot shoe contact, the second hot shoe contact, the third hot shoe contact and the fourth hot shoe contact are externally connected with a camera.
In this embodiment, the single chip microcomputer is AT89C4051.
In this embodiment, the analog switches used in the first analog switch, the second analog switch, the third analog switch and the fourth analog switch are the same in model number and are all CD4051.
In this embodiment, the first flash hot shoe, the second flash hot shoe, the third flash hot shoe, the fourth flash hot shoe, the fifth flash hot shoe, the sixth flash hot shoe, the seventh flash hot shoe and the eighth flash hot shoe may have the same type of flash hot shoe, and the brand may be nikon, canon, sony.
In this embodiment, the number comparator is a model number 74HC85.
In this embodiment, the same type of flash lamp is the same type, and the brand may be nikon, canon, sony.
Preferably, the present embodiment further provides a working method based on the novel camera flash HUB device, including the following steps:
step S1, after the device is electrified, four signal wires P3.3, P3.4, P3.5 and P3.7 of the singlechip are used for controlling A, B, C, INH signals of the first analog switch, the second analog switch, the third module switch and the fourth analog switch which are electrically connected, so that the selection of channels of the four analog switches is finished, the selection of 8 flash lamp hot shoes is further finished, the states of eight flash lamps connected with the eight flash lamp hot shoes are sequentially read, a group of flash lamps with power back is selected, and the states of the selected flash lamps are transmitted to the numerical comparator;
s2, the first hot shoe contact, the second hot shoe contact, the third hot shoe contact and the fourth hot shoe contact are respectively connected with four comparison data input ends of the numerical comparator in sequence and used for providing current state signals of currently selected flash lamps;
step S3, before a camera shutter is pressed down, the data transmitted to the numerical comparator by the singlechip in the step S1 are equal to the data transmitted to the numerical comparator by the four hot shoe contacts, and at the moment, the QA=B end of the numerical comparator outputs high level; when the camera shutter is pressed, the data transmitted to the numerical comparator by the four hot shoe contacts are changed; the data transmitted to the numerical value comparator by the four hot shoe contacts in the step S2 are unequal to the data transmitted to the numerical value comparator by the singlechip in the step S1, the QA=B end of the numerical value comparator outputs a low level, a falling edge jump is generated, and an interrupt request signal is sent to the singlechip;
and S4, after receiving an interrupt request signal, the singlechip reads the states of the corresponding hot shoe contacts through four port lines P1.4, P1.5, P1.6 and P1.7 of the singlechip again, judges whether normal flashing is finished according to the states of the contact signals, and controls the four hot shoe contacts to finish the selection of another flash lamp for finishing power return.
Preferably, in this embodiment, the common output of the 4-piece 8-out 1 analog switch terminates the 4 contacts of the camera set-top hot shoe. And the 4 paths of control signals of each flash lamp hot shoe come from the same path of terminals of the 4 analog switches respectively. The connection of the hot shoe of a specific flash lamp and which flash lamp depends on three control lines of an analog switch control signal A, B, C, and whether the flash lamp is connected or not is controlled by a control signal INH, A, B, C control lines and INH are controlled by an MCU, so that the relevant flash lamp is selected and connected, and the specific control signals are as follows:
| INH | C | B | A | switching on the flash lamp |
| 0 | 0 | 0 | 0 | Flash |
| 0 | 0 | 0 | 1 | Flash |
| 0 | 0 | 1 | 0 | Flash |
| 0 | 0 | 1 | 1 | Flash |
| 0 | 1 | 0 | 0 | Flash |
| 0 | 1 | 0 | 1 | Flash |
| 0 | 1 | 1 | 0 | Flash lamp 7 |
| 0 | 1 | 1 | 1 | Flash lamp 8 |
| 1 | x | x | x | Turning off all the flashlights |
Preferably, a digital comparator and a singlechip are also introduced in the embodiment, and in the embodiment, AT89C4051 of ATEL company is adopted, and the numerical comparator selects 74HC85. The circuit is shown in FIG. 1, the 6 pins of the value comparator, i.e. P3.2 of the equal indication termination MCU, i.e. external interrupt
And outputs a falling edge when two groups of input values of the digital comparator are different, and requests interrupt service to the MCU.
As can be seen from fig. 1, the selection of a specific flash lamp is completed by four control lines P3.3, P3.4, P3.5 and P3.7, after the device is powered up, the flash lamp 1 can be selected by default, and is controlled by a program, the MCU reads the states of 4 lines of the flash lamp through four ports P1.4, P1.5, P1.6 and P1.7, and in the waiting state, the states of the 4 lines are fixed, and the MCU sends the states of the 4 lines to the A0, A1, A2 and A3 of the numerical comparator, that is, a set of comparison data input ends of the numerical comparator through four ports P1.0, P1.1, P1.2 and P1.3; the 4 contact states of the camera hotshoe are also connected to B0, B1, B2, B3 of the numerical comparator, i.e. to another set of input data of the numerical comparator. In the case where no flash occurs, the two sets of data are equal, and the output signal of qa=b is high. When the camera shutter is pressed, the data on the flash hot shoe will change, causing the two sets of data to be unequal, so that qa=b outputs a low level, and an interrupt request is sent to the MCU. After the MCU responds to the interrupt request signal, judging that normal flashing is finished, and enabling the camera hot shoe to finish the selection of another flashing lamp through four control lines P3.3, P3.4, P3.5 and P3.7.
In the implementation control, the MCU should also carry out the existence condition of the flash lamp of each channel at first after power-on, skip the channel without flash lamp, and not select the hot shoe channel without flash lamp in the later work.
Preferably, the embodiment comprises eight hot shoes of the same brand flash lamps, a camera flash lamp connecting terminal with 4 hot shoe contacts, four 8-choice 1 analog switches with the same model, a singlechip and a numerical comparator; after the device is electrified, the singlechip reads the states of all the flashlights and transmits the states to a group of comparison data input ends (original states) of the numerical comparator; meanwhile, the 4 contact states of the camera hot shoe are connected to the other group of input data ends of the numerical comparator; when the flash lamp finishes the state of returning electricity, the two groups of data are equal, when the shutter of the camera is pressed down, the data on the hot shoe of the flash lamp can be changed, so that the two groups of data are unequal, the numerical comparator generates an interrupt request signal, and an interrupt request is sent to the MCU. After the MCU responds to the interrupt request, judging that one flash is finished, switching on the next group of camera hot shoes through four control lines of the MCU to finish the selection of another flash lamp which finishes the power return, and enabling the flash lamp which just finishes the flash to enter the power return state to prepare for the next flash. The invention adopts a plurality of flash lamps to circularly connect the hot boots of the camera, thereby improving the return speed of the flash lamps.
The foregoing description is only of the preferred embodiments of the invention, and all changes and modifications that come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein.
Claims (7)
1. A novel camera flash HUB device, characterized in that: the system comprises a first flash hot shoe, a second flash hot shoe, a third flash hot shoe, a fourth flash hot shoe, a fifth flash hot shoe, a sixth flash hot shoe, a seventh flash hot shoe, an eighth flash hot shoe, a first hot shoe contact, a second hot shoe contact, a third hot shoe contact, a fourth hot shoe contact, a first analog switch, a second analog switch, a third analog switch, a fourth analog switch, a singlechip and a numerical comparator;
the eight signal ends of the first analog switch are respectively connected with the first path control signal ends of the first flash hot shoe, the second flash hot shoe, the third flash hot shoe, the fourth flash hot shoe, the fifth flash hot shoe, the sixth flash hot shoe, the seventh flash hot shoe and the eighth flash hot shoe in sequence; the eight signal ends of the second analog switch are respectively connected with the second path control signal ends of the first flash hot shoe, the second flash hot shoe, the third flash hot shoe, the fourth flash hot shoe, the fifth flash hot shoe, the sixth flash hot shoe, the seventh flash hot shoe and the eighth flash hot shoe in sequence; the eight signal ends of the third analog switch are respectively connected with the third control signal ends of the first flash hot shoe, the second flash hot shoe, the third flash hot shoe, the fourth flash hot shoe, the fifth flash hot shoe, the sixth flash hot shoe, the seventh flash hot shoe and the eighth flash hot shoe in sequence; the eight signal ends of the fourth analog switch are respectively connected with the fourth path control signal ends of the first flash hot shoe, the second flash hot shoe, the third flash hot shoe, the fourth flash hot shoe, the fifth flash hot shoe, the sixth flash hot shoe, the seventh flash hot shoe and the eighth flash hot shoe in sequence; the first flash hot shoe, the second flash hot shoe, the third flash hot shoe, the fourth flash hot shoe, the fifth flash hot shoe, the sixth flash hot shoe, the seventh flash hot shoe and the eighth flash hot shoe are externally connected with a flash lamp with the same model;
the first control signal end of the first analog switch is respectively connected with the first control signal ends of the second analog switch, the third analog switch and the fourth analog switch; the second control signal end of the first analog switch is respectively connected with the second control signal ends of the second analog switch, the third analog switch and the fourth analog switch;
the third control signal end of the first analog switch is respectively connected with the third control signal ends of the second analog switch, the third analog switch and the fourth analog switch; the fourth control signal end of the first analog switch is respectively connected with the fourth control signal ends of the second analog switch, the third analog switch and the fourth analog switch; the first analog switch, the second analog switch, the third analog switch and the fourth analog switch are electrically connected with the single chip microcomputer and used for completing the selection of the four analog switch channels; the singlechip is electrically connected with the numerical comparator and is used for sending data to the numerical comparator and receiving an interrupt request signal sent by the numerical comparator;
the first hot shoe contact is connected with the output end of the first analog switch; the second hot shoe contact is connected with the output end of the second analog switch; the third hot shoe contact is connected with the output end of the third analog switch; the fourth hot shoe contact is connected with the output end of the fourth analog switch; the first hot shoe contact, the second hot shoe contact, the third hot shoe contact and the fourth hot shoe contact are also respectively and sequentially connected with four comparison data input ends of the numerical comparator, and are used for providing current state signals of the currently selected flash lamp; the first hot shoe contact, the second hot shoe contact, the third hot shoe contact and the fourth hot shoe contact are externally connected with a camera.
2. A novel camera flash HUB device according to claim 1, wherein: the singlechip is of the type AT89C4051.
3. A novel camera flash HUB device according to claim 1, wherein: the analog switches adopted by the first analog switch, the second analog switch, the third analog switch and the fourth analog switch are the same in model number and are all CD4051.
4. A novel camera flash HUB device according to claim 1, wherein: the first flash hot shoe, the second flash hot shoe, the third flash hot shoe, the fourth flash hot shoe, the fifth flash hot shoe, the sixth flash hot shoe, the seventh flash hot shoe and the eighth flash hot shoe adopt the same type of flash hot shoe.
5. A novel camera flash HUB device according to claim 1, wherein: the model of the numerical comparator is 74HC85.
6. A novel camera flash HUB device according to claim 1, wherein: the same model flash lamps are the same in model.
7. A method of operating a new camera flash HUB device according to any one of claims 1 to 6, characterized in that: the method comprises the following steps:
step S1, after the device is electrified, the singlechip controls the first analog switch, the second analog switch, the third analog switch and the fourth analog switch to complete the selection of the four analog switch channels, further complete the selection of eight flash lamp hot shoes, sequentially read the states of eight flash lamps connected with the eight flash lamp hot shoes, randomly select a group of flash lamps with power-back completion, and transmit the states of the selected flash lamps to the numerical comparator;
s2, the first hot shoe contact, the second hot shoe contact, the third hot shoe contact and the fourth hot shoe contact are respectively connected with four comparison data input ends of the numerical comparator in sequence and used for providing current state signals of currently selected flash lamps;
step S3, before the shutter of the camera is pressed, in the state that the flash lamp is powered back, the data transmitted to the numerical comparator by the singlechip in the step S1 are equal to the data transmitted to the numerical comparator by the four hot shoe contacts, and the numerical comparator outputs a high level at the moment; when the camera shutter is pressed, the data transmitted to the numerical comparator by the four hot shoe contacts are changed; the data transmitted to the numerical comparator by the four hot shoe contacts in the step S2 are unequal to the data transmitted to the numerical comparator by the singlechip in the step S1, the numerical comparator outputs a low level to generate falling edge jump, and the numerical comparator sends an interrupt request signal to the singlechip;
step S4, after receiving the interrupt request signal, the singlechip completes one-time flashing; reading the state of the next set of hot shoe contacts through the singlechip again, judging whether normal flashing is completed according to the state of the contact signals, and enabling a flash lamp which just completes flashing to enter a power-back state to prepare for the next flashing; meanwhile, the four hot shoe contacts are controlled to complete the selection of another flash lamp with complete power return.
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| CN201811653273.0A CN109445232B (en) | 2018-12-28 | 2018-12-28 | Novel camera flash HUB device and working method thereof |
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| CN201811653273.0A CN109445232B (en) | 2018-12-28 | 2018-12-28 | Novel camera flash HUB device and working method thereof |
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| CN109445232B true CN109445232B (en) | 2023-06-23 |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1999031560A2 (en) * | 1997-12-17 | 1999-06-24 | Color Kinetics Incorporated | Digitally controlled illumination methods and systems |
| JP2000089310A (en) * | 1998-09-07 | 2000-03-31 | Canon Inc | Strobe system |
| JP2004341329A (en) * | 2003-05-16 | 2004-12-02 | Atlus Co Ltd | Strobe light-emitting device, and automatic camera equipped therewith |
| CN201413444Y (en) * | 2009-05-22 | 2010-02-24 | 天津三星光电子有限公司 | Digital camera capable of eliminating flash lamp charging waiting time |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4053247B2 (en) * | 2000-09-19 | 2008-02-27 | ペンタックス株式会社 | Flash photography system and camera |
| US7509043B2 (en) * | 2004-05-25 | 2009-03-24 | Nikon Corporation | Illuminating device for photographing and camera |
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2018
- 2018-12-28 CN CN201811653273.0A patent/CN109445232B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1999031560A2 (en) * | 1997-12-17 | 1999-06-24 | Color Kinetics Incorporated | Digitally controlled illumination methods and systems |
| JP2000089310A (en) * | 1998-09-07 | 2000-03-31 | Canon Inc | Strobe system |
| JP2004341329A (en) * | 2003-05-16 | 2004-12-02 | Atlus Co Ltd | Strobe light-emitting device, and automatic camera equipped therewith |
| CN201413444Y (en) * | 2009-05-22 | 2010-02-24 | 天津三星光电子有限公司 | Digital camera capable of eliminating flash lamp charging waiting time |
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| CN109445232A (en) | 2019-03-08 |
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