CN1112800C - Exposure controller and control method - Google Patents
Exposure controller and control method Download PDFInfo
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- CN1112800C CN1112800C CN98106305A CN98106305A CN1112800C CN 1112800 C CN1112800 C CN 1112800C CN 98106305 A CN98106305 A CN 98106305A CN 98106305 A CN98106305 A CN 98106305A CN 1112800 C CN1112800 C CN 1112800C
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Abstract
The present invention relates to an exposure controller and a control method. The present invention is characterized in that when a CCD module is exposed, and three excitation signals can be respectively transmitted by a counter to respectively excite a red light sensor, a green light sensor and a blue light sensor in the CCD module to pick up required image signals. Since the excitation signals fed in the CCD sensors are respectively independent and the CCD sensors react only in view of the excitation signals with certain characteristics, the CCD can be prevented from being restricted by other uncorrelated excitation signals. Exposure time is greatly increased, and therefore, the service life of electronic elements is prolonged, production cost is decreased, and the competitive power of products is increased.
Description
Technical field
The present invention relates to a kind of exposure device and method, relate in particular to a kind of being applied in the scanner, with respectively exciting light sensing element, for example exposure-control device and the method for charge coupled cell (Charge Coupled Device, C D) of excitation signal independently separately.
Background technology
CCD is a kind of semiconductor element, when CCD is subjected to light source irradiation, luminous intensity can be converted to the size of the quantity of electric charge, in general, stronger when the illumination that is subjected to, the interior stored electric charge of CCD the more, according to the intensity difference of its suffered illumination, its inner stored quantity of electric charge is also different.Based on this specific character, can be with a large amount of CCD proper alignment, synthetic CCD module, when light source irradiation is on image, can produce the exposure signal that corresponds to image, therefore can utilize the photobehavior of CCD module, exposure signal is received, via processing procedures such as conversion of signals, do various application.For instance, in the application of scanner, can utilize the photobehavior of CCD module, coloured image is captured; Its processing mode, be three CCD sensors that utilize in the CCD module, for example: ruddiness, green glow and blue light sensor, in the action of exposure, capture ruddiness, green glow and blue light picture signal respectively with respect to exposure signal, by effect by the CCD module, the three primary colors picture signal can be exported, and via suitable conversion, the three primary colors picture signal is converted to digital data form, and then the three primary colors numerical data of red, green, blue made up, the color picture signal that the CCD module can be captured is rebuild.Wherein the output of picture signal is controlled by excitation signal, every reception one excitation signal of CCD module, and promptly one of them carries out data acquisition at the three primary colors picture signal.
Shown in Figure 1A, Figure 1A is a kind of CCD module mode of excitation of prior art.CCD module 10 can comprise 3 CCD sensors, when making the CCD sensor, can make different CCD sensors respectively at the coloured light that has of three kinds of different wave lengths of RGB, received respectively at the three primary colors exposure signal enabling, via the tricolor signal combination, colored exposure signal is reappeared then; At this, can reach above-mentioned function via ruddiness sensor 100, green glow sensor 110 and blue light sensor 120 threes.The practice of prior art, when image 4 is subjected to light source 2 irradiations, can produce exposure signal 6, excited simultaneously by 15 pairs of ruddiness sensors 100 of excitation signal, green glow sensor 110 and blue light sensor 120 this moment, just can capture in exposure signal 6 respectively and exposure signal 6 corresponding ruddiness, green glow and blue light picture signal.Therefore on the practice, just can be with holding wire 105,115 and 125 mutual short circuits, make excitation signal 15 distinguish feed-in ruddiness sensors 100, green glow sensor 110 and blue light sensor 120 by holding wire 105,115 and 125 simultaneously, because holding wire 105,115 and 125 mutual short circuits, therefore received excitation signal is identical.
See also Figure 1B, it illustrates the relativeness of excitation signal and CCD sensor among Figure 1A.The excitation signal received owing to red, green, blue three sensors is identical, so excitation signal 15 can excite ruddiness sensor 100, green glow sensor 110 and blue light sensor 120 threes simultaneously.With Figure 1B is example, when pulse wave 132,134,136,138,140,142 and 144 produces, just simultaneously red, green, blue three sensors is excited.Because excitation signal has one-period T
1, so the acquisition time of the picture signal of each color be not more than T
1, in other words, each CCD sensor can not surpass the period T of excitation signal by exposing, be excited to the time that data acquisition is finished
1In Figure 1B, promptly clearly show the acquisition situation of data.
Before pulse 132 took place, three sensors all were in the sensitization state in this hypothesis, and produced the back in pulse 132 and before next pulse 134 produces one-period time T 1 is arranged, and in cycle time T1, three sensors can be finished the action of sensitization simultaneously.When pulse wave 132 takes place, excite with being about to three CCD sensors 100,110 and 120,, just in ruddiness sensor 100, the ruddiness picture signal is captured out if need acquisition ruddiness picture signal, and in pulse 132 to cycle time of pulse wave 134 in the T1, carry out exposure program next time.Cycle time before pulse wave 132 produces back to next pulse wave 134 and produces, the while sensitization of three sensors was finished in the T1; When pulse wave 134 takes place, once more three CCD sensors 100,110 and 120 are excited,, just in green glow sensor 110, the green glow picture signal is captured out if need acquisition green glow picture signal, and in pulse 134 to cycle time of pulse 136 in the T1, carry out exposure program next time.Same operating process can be when pulse wave 136 produces, and acquisition pulse 134 is to cycle time of pulse 136 in the T1, the blue light picture signal that is received; Repeat this step, the three primary colors picture signal that obtains is successively made up, coloured image is reappeared.
Because the practice of prior art is to utilize same excitation signal to excite red, green, blue three CCD sensors simultaneously, so each sensor can not surpass the cycle of excitation signal from being exposed to the time that data acquisition finishes; From another viewpoint of measures, because the shared same excitation signal of three CCD sensors, therefore arbitrary CCD sensor all is subjected to pining down of all the other sensors, and the time for exposure was confined in the cycle time of excitation signal.For reaching this requirement, obtain the CCD sensor time for exposure certainly will with the excitation signal close fit, under the situation that scanning quality and speed need be taken into account, must improve the production cost of CCD module, reduced competitiveness of product.
Moreover for reaching the requirement that the exposure of CCD sensor is finished, light-source brightness that must exposure is required increases, to shorten the time for exposure, so, higher source luminance is except increasing manufacturing cost, more make power consumption increase, and working temperature is raise, shorten the life-span of electronic component.
In addition, in the of short duration time for exposure, scanning quality and speed are taken into account, therefore necessarily require the signal noise ratio (S/N ratio) of relevant apparatus such as optical element, CCD module to improve, to increase the accuracy of sweep signal, so, just improved production cost.
Take a broad view of the above, the exposure-control device of prior art has following shortcoming:
1. light-source brightness improves, and causes power consumption to increase, and working temperature is improved, and shortens the life-span of electronic component.
2. the signal noise ratio of relevant apparatus such as optical element and CCD module improves, and causes production cost to increase.
3. for reaching the time for exposure requirement of CCD sensor, cause cost to increase, reduced the competitiveness of product on market.
Summary of the invention
The objective of the invention is to a kind of exposure-control device and method, the time for exposure that it can make the CCD sensor is extended not influencing under the sweep speed, allow the CCD module not increase under the production cost, can reach high signal noise ratio (S/N ratio), increase the competitiveness on the market.
Another object of the present invention is to provide a kind of exposure-control device and method, it can adopt the light source of low-light level, with effective attenuating power consumption, and reduces working temperature, prolongs the electronic component life-span.
A further object of the present invention is to provide a kind of exposure-control device and method, and it can adopt signal noise ratio to require low related elements, and production cost of products is reduced, and increases the competitiveness on the market.
The object of the present invention is achieved like this:
A kind of exposure-control device in order to the exposure signal of acquisition corresponding to an image, is characterized in
This exposure-control device comprises:
One signal generator, receive an excitation signal, and export one first excitation signal from one first holding wire, export one second excitation signal and export one the 3rd excitation signal from a secondary signal line from one the 3rd holding wire, in the cycle time of this excitation signal, only send this first excitation signal and this second excitation signal and the 3rd excitation signal three and select one signal;
One ruddiness sensor, this exposure signal of sensing, and couple with this first holding wire, according to this first excitation signal, output and the corresponding ruddiness picture signal of this exposure signal;
One green glow sensor, sensing should influence in exposure, and couples with this secondary signal line, according to this second excitation signal, output and the corresponding green glow picture signal of this exposure signal; And
One blue light sensor, this exposure signal of sensing, and couple with the 3rd holding wire, according to the 3rd excitation signal, output and the corresponding blue light picture signal of this exposure signal.
In above-mentioned exposure-control device, wherein, described excitation signal is by the oscillator generator.
In above-mentioned exposure-control device, wherein, described excitation signal is to be produced by frequency generator.
In above-mentioned exposure-control device, wherein, described signal generator is a counter.
The present invention makes it to have the following advantages at least owing to adopted above-mentioned technical scheme and method:
1.CCD the time for exposure of sensor prolongs, and makes the picture signal that captures more complete, and the time for exposure susceptibility of CCD sensor is required to reduce, and has saved the cost of manufacture of CCD module, and product competitiveness is improved.
2. because the time for exposure prolongs, make that the brightness requirement of light source is lower, can save the required power consumption of work, and working temperature is reduced, prolong the life-span of electronic component.
3. because the time for exposure prolongs, and therefore lower to the signal noise ratio requirement of relevant apparatus such as optical element, CCD module, even so, scanning quality and speed are still taken into account, so, production cost just significantly reduces, and has improved competitiveness of product.
Description of drawings
By following exposure-control device of the present invention is combined the description of its accompanying drawing with an embodiment of method, can further understand purpose of the present invention, feature and advantage.Wherein, accompanying drawing is:
Figure 1A is the exposure control mode schematic diagram of prior art;
Figure 1B concerns schematic diagram between excitation signal and data acquisition among Figure 1A;
Fig. 2 A is a kind of exposure-control device according to an embodiment of the exposure-control device of the present invention's proposition and method;
Fig. 2 B concerns schematic diagram between excitation signal and three primary colors excitation signal among Fig. 2 A.
Embodiment
Please refer to Fig. 2 A, it illustrates a kind of exposure-control device schematic diagram according to a preferred embodiment of the present invention.When crystal 4 is subjected to light source 2 irradiations, can produce exposure signal 6, different with the prior art practice locates, and is that the present invention can utilize the excited state of counter 200 control CCD sensors, and is controlled respectively.Therefore on the practice, counter 200 can receive excitation signal 15, and excite ruddiness sensor 110, green glow sensor 110 and blue light sensor 120 by holding wire 205,215,225 respectively, make with respect to the ruddiness picture signal in the exposure signal 6 to be able to from 100 outputs of ruddiness sensor; Make with respect to the green glow picture signal in the exposure signal 6 and be able to from 110 outputs of green glow sensor; And make with respect to the blue light picture signal in the exposure signal 6 and be able to from blue light sensor 120 output.For instance, when needs capture the ruddiness picture signal separately, just make it excite excitation signal feed-in ruddiness sensor 100, with acquisition ruddiness picture signal, therefore just do not need excite green glow and blue light sensor because do not need green glow and blue light picture signal this moment.In like manner, when acquisition green glow and blue light picture signal, the mode of excitation of its CCD sensor is also similar with said method.This kind mode of excitation biggest advantage, be whether exciting of each CCD sensor, the acquisition demand of looking closely the three primary colors picture signal, and distinctly excited, therefore, be mutually independently between each CCD sensor, can dispense unnecessary exciting and exposure actions again, only the CCD sensor exposure to needs gets final product.
See also shown in Fig. 2 B, it illustrates the timing diagram of excitation signal among Fig. 2 A.Wherein the pattern of excitation signal by the effect by counter 200, can receive excitation signal 15 with identical shown in Figure 1B, and produces three different excitation signals, excites three CCD sensors respectively.It links Guan Shiwei: first excitation signal excites ruddiness sensor 100, the second excitation signals to excite green glow sensor 110 through secondary signal line 215 through first holding wire 205, and the 3rd excitation signal excites blue light sensor 120 through the 3rd holding wire 225.By finding out among the figure,, in the cycle time of excitation signal 15 T1, only send first excitation signal and second excitation signal and the 3rd excitation signal three selects one signal by effect by counter 200.
At this, suppose that three sensors all are in the sensitization state before pulse wave 132 takes place.Only sending first excitation signal and second excitation signal and the 3rd excitation signal in the cycle time of excitation signal selects one signal for example, is one of important technology feature of the present invention., when needs acquisitions ruddiness picture signal,, when pulse wave 232 produces, just separately ruddiness sensor 100 is excited just with the first excitation signal feed-in ruddiness sensor 100, pulse wave 232 is taken place before institute's sensitization to the ruddiness picture signal exported.To the cycle time of pulse wave 238, can allow ruddiness sensor 100 fully expose at pulse wave 232 once more.When pulse wave 238 produces, just carry out the acquisition action of last ruddiness picture signal, and carry out exposure program next time.In the cycle time of pulse wave 238 pulse waves 244, allow ruddiness sensor 100 fully expose again, and when pulse wave 244 produces, carry out the acquisition action of last ruddiness picture signal, and carry out exposure program next time.
In like manner, when needs acquisition green glow picture signal, can be with the second excitation signal feed-in green glow sensor 110, when pulse wave 234 produces, just green glow sensor 110 is excited, carrying out the acquisition action of last green glow picture signal, and carry out exposure program next time; In the cycle time of 240 of pulse wave 234 and pulse waves, still can allow green glow sensor 110 fully expose, and when pulse wave 240 produces, carry out the acquisition action of last green glow picture signal, and carry out exposure program next time.In like manner can when pulse wave 236 produces, excite blue light sensor 120, carrying out the acquisition action of last blue light picture signal, and carry out exposure program next time; In the cycle time of 242 of pulse wave 236 and pulse waves, still can allow blue light sensor 120 fully expose, and when pulse wave 242 produces, carry out the acquisition action of last blue light picture signal, and carry out exposure program next time.
At this, please understand, the excitating sequence of Fig. 2 is only for reference.In fact, under this kind exposure control architecture,, therefore can protect the color data of required acquisition at any time, corresponding CCD sensor be excited, without any the restriction of excitating sequence because the excitation signal of three CCD sensors is independent separately.
By among Fig. 2 B as can be known, because three CCD sensors are to excite respectively, therefore compare with the mode of prior art, if the picture signal that acquisition is identical, exposure-control device provided by the present invention, the time for exposure of CCD sensor can be prolonged 3 times, plenty of time makes the picture signal that captures more complete correct to exposure signal 6 reactions to make the CCD sensor have more.
In sum, the present invention utilizes counter to send three excitation signals respectively, distinctly to the ruddiness sensor, green glow sensor and blue light sensor are excited, because the excitation signal of each CCD sensor of feed-in is independent separately, and each CCD sensor only reacts at the excitation signal of certain characteristic, therefore can avoid the CCD sensor pind down by other incoherent excitation signals, significantly increase the time for exposure, thus, not only the time for exposure susceptibility to the CCD sensor requires to reduce, brightness requirement to light source is lower, to optical element, the signal noise ratio of relevant apparatus such as CCD module requires lower, has prolonged the life-span of electronic component, reduce production cost, improved competitiveness of product.
Claims (4)
1. exposure-control device in order to the exposure signal of acquisition corresponding to an image, is characterized in that this exposure-control device comprises:
One signal generator, receive an excitation signal, and export one first excitation signal from one first holding wire, export one second excitation signal and export one the 3rd excitation signal from a secondary signal line from one the 3rd holding wire, in the cycle time of this excitation signal, only send this first excitation signal and this second excitation signal and the 3rd excitation signal three and select one signal;
One ruddiness sensor, this exposure signal of sensing, and couple with this first holding wire, according to this first excitation signal, output and the corresponding ruddiness picture signal of this exposure signal;
One green glow sensor, sensing should influence in exposure, and couples with this secondary signal line, according to this second excitation signal, output and the corresponding green glow picture signal of this exposure signal; And
One blue light sensor, this exposure signal of sensing, and couple with the 3rd holding wire, according to the 3rd excitation signal, output and the corresponding blue light picture signal of this exposure signal.
2. exposure-control device as claimed in claim 1 is characterized in that: described excitation signal is by the oscillator generator.
3. exposure-control device as claimed in claim 1 is characterized in that: described excitation signal is to be produced by frequency generator.
4. exposure-control device as claimed in claim 1 is characterized in that: described signal generator is a counter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN98106305A CN1112800C (en) | 1998-03-30 | 1998-03-30 | Exposure controller and control method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN98106305A CN1112800C (en) | 1998-03-30 | 1998-03-30 | Exposure controller and control method |
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| Publication Number | Publication Date |
|---|---|
| CN1230843A CN1230843A (en) | 1999-10-06 |
| CN1112800C true CN1112800C (en) | 2003-06-25 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN98106305A Expired - Fee Related CN1112800C (en) | 1998-03-30 | 1998-03-30 | Exposure controller and control method |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| TWI512770B (en) | 2007-09-29 | 2015-12-11 | Delta Electronics Inc | Power transformer structure |
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- 1998-03-30 CN CN98106305A patent/CN1112800C/en not_active Expired - Fee Related
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| CN1230843A (en) | 1999-10-06 |
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