CN101959016B - Power-saving method of image capture device - Google Patents
Power-saving method of image capture device Download PDFInfo
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- CN101959016B CN101959016B CN2009101594754A CN200910159475A CN101959016B CN 101959016 B CN101959016 B CN 101959016B CN 2009101594754 A CN2009101594754 A CN 2009101594754A CN 200910159475 A CN200910159475 A CN 200910159475A CN 101959016 B CN101959016 B CN 101959016B
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Abstract
The invention discloses a power-saving method of an image capture device, which is applied to an image capture device with a flash lamp, and comprises the following steps: storing a first exposure travel table and a second exposure travel table in the image capture device; under a normal mode, shooting according to the first exposure travel table by the image capture device; and under a power-saving mode, shooting according to the second exposure travel table by the image capture device, wherein the first exposure travel table has a first shutter speed for correspondingly opening the flash lamp, the second exposure travel table has a second shutter speed for correspondingly opening the flash lamp, and the first shutter speed is faster than the second shutter speed. According to the operation mode of the image capture device, the exposure travel table of the image capture device can be adjusted by the method correspondingly, thus prolonging the service time of the image capture device.
Description
Technical field
The present invention is about a kind of electricity saving method, particularly about a kind of electricity saving method of image capturing device.
Background technology
Image capturing device (for example; Digital camera) is the emerging product that combines optics, precision optical machinery and electronics technology; It is through Charged Coupled Device (charge-coupled device; CCD) image transitions that camera lens is obtained becomes data image signal, and the processing through electronic circuit is stored in data image signal in the Storage Media, like disk sheet, discs or IC memory card.On the other hand, image also can manifest (like TV or monitor) immediately on various displays, utilizes function again with the editor that makes various images, modification etc., and is quite convenient and save time economical.
Along with after digital camera becomes the main flow consumption electronic product in recent years gradually, the consumer also constantly promotes the requirement of digital camera functionality, for example high pixel, short-movie shoot function, big LCD display curtain, big capacity internal memory, small size and light weight etc.In this case, use of prolongation battery and standby time become the significant challenge that the digital camera design engineer faces.
In general digital camera, photoflash lamp is the assembly of using always, in order to the required light source of reinforcement when capturing image.Yet, when needs use photoflash lamp, need to excite photoflash lamp with fixing excitation intensity; And can't adjust in response to shooting condition at that time, therefore, consume the electric power of digital camera easily; And then shorten the spendable time of digital camera; Though can save the electric power of digital camera through electricity-saving mechanism, in the electricity-saving mechanism of present digital camera, in general; Have that the bright shadow in screen backlight source is whole to get into two kinds of the time sets of battery saving mode with digital camera, yet the electric power amplitude that above-mentioned two kinds of electricity-saving mechanisms can be saved is still limited.
Therefore, how a kind of electricity saving method of image capturing device is provided, becomes one of researcher's problem to be solved.
Summary of the invention
The technical problem that the present invention solves is to provide a kind of electricity saving method of image capturing device; Operating mode according to image capturing device; The exposure travel schedule of corresponding adjustment image capturing device; With let photoflash lamp when second shutter speed faster than or trigger flashing just when equaling safety shutter, and then save the electric power of image capturing device.
The invention discloses a kind of electricity saving method of image capturing device; Be applied to have on the image capturing device of photoflash lamp, the electricity saving method of image capturing device includes the following step: store the first exposure travel schedule and the second exposure travel schedule in image capturing device; Under normal mode, image capturing device is taken with the first exposure travel schedule; And under battery saving mode, image capturing device is taken with the second exposure travel schedule; Wherein the first exposure travel schedule has corresponding first shutter speed of opening photoflash lamp, and the second exposure travel schedule has corresponding second shutter speed of opening photoflash lamp, and first shutter speed is faster than second shutter speed.
The electricity saving method of image capturing device of the present invention; Operating mode according to image capturing device; The exposure travel schedule of corresponding adjustment image capturing device; With let photoflash lamp when second shutter speed faster than or trigger flashing just when equaling safety shutter, photoflash lamp can be adjusted, and in response to shooting condition at that time under battery saving mode; Modes such as the source adjustment of collocation screen backlight, flash light intensity adjustment, photosensitivity adjustment and software IGBT are saved the electric power of image capturing device, and then prolong the service time of image capturing device.
Description of drawings
Fig. 1 is the flow chart of steps of first embodiment of the invention;
Fig. 2 is the flow chart of steps of second embodiment of the invention;
Fig. 3 is the flow chart of steps of third embodiment of the invention;
Fig. 4 is the flow chart of steps of fourth embodiment of the invention;
Fig. 5 is the sketch map of the first exposure travel schedule of the present invention;
Fig. 6 is the sketch map of the second exposure travel schedule of the present invention.
Wherein, Reference numeral:
10 first exposure travel schedules
20 second exposure travel schedules
Embodiment
The electricity saving method of image capturing device disclosed according to the present invention; Can be applicable on image input devices such as digital camera, network camera; And can be built in notebook computer, PDA, digital frame, mobile phone etc. and have in the electronic installation of window interface, so that being provided, the user operates relevant function.Yet accompanying drawing only provides reference and explanation usefulness, is not in order to restriction the present invention.
Please, be the flow chart of steps of first embodiment of the invention with reference to Fig. 1.As shown in Figure 1, the electricity saving method of image capturing device of the present invention is applied to have on the image capturing device (for example, digital camera) of photoflash lamp, and the electricity saving method of image capturing device includes the following step:
At first; Store the first exposure travel schedule and the second exposure travel schedule (step 100) in image capturing device; Wherein the first exposure travel schedule and the second exposure travel schedule can be stored in the internal memory of image capturing device; In addition, the first exposure travel schedule and the second exposure travel schedule also can be set up on their own, adjust and stored by the user.
Under normal mode; Image capturing device is taken (step 110) with the first exposure travel schedule; Wherein record the corresponding relation (as shown in Figure 5) of shutter speed and ambient brightness in the first exposure travel schedule; And image capturing device is according to institute's numerical values recorded in the first exposure travel schedule, with the condition of decision trigger flashing lamp.
Then; Under battery saving mode; Image capturing device is taken with the second exposure travel schedule, and wherein the first exposure travel schedule has corresponding first shutter speed of opening photoflash lamp, and the second exposure travel schedule has corresponding second shutter speed of opening photoflash lamp; And first shutter speed is faster than second shutter speed (step 120), and second shutter speed faster than or equal the safety shutter speed of image capturing device.The definition of safety shutter is the inverse of lens focus, and for example, the safety shutter when using the 50mm focal length is 1/50 second.In addition, record the corresponding relation (as shown in Figure 6) of shutter speed and ambient brightness in the second exposure travel schedule, and image capturing device is according to institute's numerical values recorded in the second exposure travel schedule, with the condition of decision trigger flashing lamp.Battery saving mode can trigger according to the remaining battery power of image capturing device, and perhaps, battery saving mode also can trigger according to the set point of user's interface of image capturing device.
Please, be the flow chart of steps of second embodiment of the invention with reference to Fig. 2.As shown in Figure 2, the electricity saving method of image capturing device of the present invention is applied to have on the image capturing device (for example, digital camera) of photoflash lamp, and the electricity saving method of image capturing device includes the following step:
At first; Store the first exposure travel schedule and the second exposure travel schedule (step 200) in image capturing device; Wherein the first exposure travel schedule and the second exposure travel schedule can be stored in the internal memory of image capturing device; In addition, the first exposure travel schedule and the second exposure travel schedule also can be set up on their own, adjust and stored by the user.
Under normal mode; Image capturing device is taken (step 210) with the first exposure travel schedule; Wherein record the corresponding relation (as shown in Figure 5) of shutter speed and ambient brightness in the first exposure travel schedule; And image capturing device is according to institute's numerical values recorded in the first exposure travel schedule, with the condition of decision trigger flashing lamp.
Then; Under battery saving mode, image capturing device is taken with the second exposure travel schedule, and the photosensitivity of turning down the flash intensity of photoflash lamp and heightening image capturing device; Wherein the first exposure travel schedule has corresponding first shutter speed of opening photoflash lamp; The second exposure travel schedule has corresponding second shutter speed of opening photoflash lamp, and first shutter speed is faster than second shutter speed (step 220), and second shutter speed faster than or equal the safety shutter speed of image capturing device.The definition of safety shutter is the inverse of lens focus, and for example, the safety shutter when using the 50mm focal length is 1/50 second.In addition, record the corresponding relation (as shown in Figure 6) of shutter speed and ambient brightness in the second exposure travel schedule, and image capturing device is according to institute's numerical values recorded in the second exposure travel schedule, with the condition of decision trigger flashing lamp.Battery saving mode can trigger according to the remaining battery power of image capturing device, and perhaps, battery saving mode also can trigger according to the set point of user's interface of image capturing device.
The present invention saves the electric power that photoflash lamp consumes through turning down the flash intensity of photoflash lamp, and the photosensitivity of heightening image capturing device simultaneously comes reinforcement, uses the electric power of saving image capturing device.
Please, be the flow chart of steps of third embodiment of the invention with reference to Fig. 3.As shown in Figure 3, the electricity saving method of image capturing device of the present invention is applied to have on the image capturing device (for example, digital camera) of photoflash lamp, and the electricity saving method of image capturing device includes the following step:
At first; Store the first exposure travel schedule and the second exposure travel schedule (step 300) in image capturing device; Wherein the first exposure travel schedule and the second exposure travel schedule can be stored in the internal memory of image capturing device; In addition, the first exposure travel schedule and the second exposure travel schedule also can be set up on their own, adjust and stored by the user.
Under normal mode; Image capturing device is taken (step 310) with the first exposure travel schedule; Wherein record the corresponding relation (as shown in Figure 5) of shutter speed and ambient brightness in the first exposure travel schedule; And image capturing device is according to institute's numerical values recorded in the first exposure travel schedule, with the condition of decision trigger flashing lamp.
Then; Under battery saving mode, image capturing device is taken with the second exposure travel schedule, and turns down the back light source brightness of the screen of image capturing device; Wherein the first exposure travel schedule has corresponding first shutter speed of opening photoflash lamp; The second exposure travel schedule has corresponding second shutter speed of opening photoflash lamp, and first shutter speed is faster than second shutter speed (step 320), and second shutter speed faster than or equal the safety shutter speed of image capturing device.The definition of safety shutter is the inverse of lens focus, and for example, the safety shutter when using the 50mm focal length is 1/50 second.In addition, record the corresponding relation (as shown in Figure 6) of shutter speed and ambient brightness in the second exposure travel schedule, and image capturing device is according to institute's numerical values recorded in the second exposure travel schedule, with the condition of decision trigger flashing lamp.Battery saving mode can trigger according to the remaining battery power of image capturing device, and perhaps, battery saving mode also can trigger according to the set point of user's interface of image capturing device.
A little less than the present invention automatically switches into through the backlight with screen; And take pictures, browse the user or during by function key; Do not do the backlight projection of continuation, but after the user accomplished above-mentioned behavior (take pictures, browse or by function key), detecting the user there was not lasting pressing keys; Just the backlight of screen is turned off, used the electric power of saving image capturing device.
Please, be the flow chart of steps of fourth embodiment of the invention with reference to Fig. 4.As shown in Figure 4, the electricity saving method of image capturing device of the present invention is applied to have on the image capturing device (for example, digital camera) of photoflash lamp, and the electricity saving method of image capturing device includes the following step:
At first; Store the first exposure travel schedule and the second exposure travel schedule (step 400) in image capturing device; Wherein the first exposure travel schedule and the second exposure travel schedule can be stored in the internal memory of image capturing device; In addition, the first exposure travel schedule and the second exposure travel schedule also can be set up on their own, adjust and stored by the user.
Under normal mode; Image capturing device is taken (step 410) with the first exposure travel schedule; Wherein record the corresponding relation (as shown in Figure 5) of shutter speed and ambient brightness in the first exposure travel schedule; And image capturing device is according to institute's numerical values recorded in the first exposure travel schedule, with the condition of decision trigger flashing lamp.
Then; Under battery saving mode, image capturing device is taken with the second exposure travel schedule, and image capturing device utilizes software mode to carry out the IGBT function; Wherein the first exposure travel schedule has corresponding first shutter speed of opening photoflash lamp; The second exposure travel schedule has corresponding second shutter speed of opening photoflash lamp, and first shutter speed is faster than second shutter speed (step 420), and second shutter speed faster than or equal the safety shutter speed of image capturing device.The definition of safety shutter is the inverse of lens focus, and for example, the safety shutter when using the 50mm focal length is 1/50 second.In addition, record the corresponding relation (as shown in Figure 6) of shutter speed and ambient brightness in the second exposure travel schedule, and image capturing device is according to institute's numerical values recorded in the second exposure travel schedule, with the condition of decision trigger flashing lamp.Battery saving mode can trigger according to the remaining battery power of image capturing device, and perhaps, battery saving mode also can trigger according to the set point of user's interface of image capturing device.
Because the IGBT function of image capturing device realizes through photoflash lamp originally, and the present invention carries out the IGBT function through software mode down in battery saving mode, uses the electric power of saving image capturing device.
Please, be the sketch map of the first exposure travel schedule of the present invention with reference to Fig. 5.As shown in Figure 5, the transverse axis of the first exposure travel schedule 10 of the present invention is represented as ambient brightness, and the longitudinal axis of the first exposure travel schedule 10 is represented as shutter speed.
For instance; When image capturing device under normal mode, the aperture of image capturing device is 3.1, shutter speed is that 1/60 second, photosensitivity are 80 o'clock, according to 10 numerical values recorded of the first exposure travel schedule; Ambient brightness 9.49 is the critical value of photoflash lamp; In other words, if ambient brightness was less than or equal to 9.49 o'clock, image capturing device can be in shooting process the trigger flashing lamp.
When image capturing device under normal mode; The aperture of image capturing device is 3.1, shutter speed is that 1/60 second, photosensitivity are 200 o'clock; According to 10 numerical values recorded of the first exposure travel schedule, ambient brightness 8.17 is the critical value of photoflash lamp, in other words; If ambient brightness was less than or equal to 8.17 o'clock, image capturing device can be in shooting process the trigger flashing lamp.
Please, be the sketch map of the second exposure travel schedule of the present invention with reference to Fig. 6.As shown in Figure 6, the transverse axis of the second exposure travel schedule 20 of the present invention is represented as ambient brightness, and the longitudinal axis of the second exposure travel schedule 20 is represented as shutter speed.
For instance, when image capturing device under battery saving mode, the aperture of image capturing device is 3.1, shutter speed is that (focal length with camera lens was that 35mm is an example in 1/35 second; So shutter speed equals the safety shutter speed of image capturing device), photosensitivity is 200 o'clock; According to 20 numerical values recorded of the second exposure travel schedule, ambient brightness 7.39 is the critical value of photoflash lamp, in other words; If ambient brightness was less than or equal to 7.39 o'clock; Image capturing device can be in shooting process the trigger flashing lamp, if ambient brightness is higher than at 7.39 o'clock, image capturing device can be in shooting process the trigger flashing lamp.So, can let image capturing device under battery saving mode, unlikely trigger flashing lamp under bright environment and consume too much energy is used the electric power of saving image capturing device.
Comprehensive the above; The electricity saving method of image capturing device of the present invention; According to the operating mode of image capturing device, the exposure travel schedule of corresponding adjustment image capturing device, with let photoflash lamp second shutter speed faster than or trigger flashing just when equaling safety shutter; Photoflash lamp can be adjusted in response to shooting condition at that time; And under battery saving mode, modes such as the source adjustment of collocation screen backlight, flash light intensity adjustment, photosensitivity adjustment and software IGBT are saved the electric power of image capturing device, and then prolong the service time of image capturing device.
Claims (7)
1. the electricity saving method of an image capturing device is applied to have on the image capturing device of a photoflash lamp, it is characterized in that the electricity saving method of this image capturing device includes the following step:
This image capturing device stores one first exposure travel schedule and one second exposure travel schedule;
Under a normal mode, this image capturing device is taken with this first exposure travel schedule; And
Under a battery saving mode, this image capturing device is taken with this second exposure travel schedule;
Wherein this first exposure travel schedule has corresponding one first shutter speed of opening this photoflash lamp; This second exposure travel schedule has corresponding one second shutter speed of opening this photoflash lamp; And this first shutter speed is faster than this second shutter speed, the step that this battery saving mode includes a flash intensity of turning down this photoflash lamp and heightens a photosensitivity of this image capturing device.
2. the electricity saving method of image capturing device as claimed in claim 1 is characterized in that, this second shutter speed is a safety shutter speed that equals this image capturing device.
3. the electricity saving method of image capturing device as claimed in claim 1 is characterized in that, this second shutter speed is the safety shutter speed faster than this image capturing device.
4. the electricity saving method of image capturing device as claimed in claim 1 is characterized in that, this battery saving mode is the remaining battery power triggering according to this image capturing device.
5. the electricity saving method of image capturing device as claimed in claim 1 is characterized in that, this battery saving mode is the set point triggering according to user's interface of this image capturing device.
6. the electricity saving method of image capturing device as claimed in claim 1 is characterized in that, this battery saving mode includes the step of a back light source brightness of a screen of turning down this image capturing device.
7. the electricity saving method of image capturing device as claimed in claim 1 is characterized in that, this battery saving mode includes this image capturing device and utilizes a software mode to carry out the step of an IGBT function.
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| CN2009101594754A CN101959016B (en) | 2009-07-14 | 2009-07-14 | Power-saving method of image capture device |
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| CN2009101594754A CN101959016B (en) | 2009-07-14 | 2009-07-14 | Power-saving method of image capture device |
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| CN101959016B true CN101959016B (en) | 2012-08-22 |
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| US9456109B2 (en) | 2012-05-24 | 2016-09-27 | Panasonic Intellectual Property Corporation Of America | Information communication method of obtaining information from a subject by demodulating data specified by a pattern of a bright line included in an obtained image |
| US9407368B2 (en) | 2012-12-27 | 2016-08-02 | Panasonic Intellectual Property Corporation Of America | Information communication method |
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