CN100451932C - Light source control module and method suitable for cursor device - Google Patents
Light source control module and method suitable for cursor device Download PDFInfo
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- CN100451932C CN100451932C CNB2004100041525A CN200410004152A CN100451932C CN 100451932 C CN100451932 C CN 100451932C CN B2004100041525 A CNB2004100041525 A CN B2004100041525A CN 200410004152 A CN200410004152 A CN 200410004152A CN 100451932 C CN100451932 C CN 100451932C
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Abstract
The present invention relates to a light source control module for a cursor device, which comprises a processing unit for outputting a first signal and a second signal, an image detecting unit for executing the operation of extraction according to the pulse of the first signal and a light emitting unit for executing light emitting operation according to the pulse of the second signal, wherein when the value of the frequency of the first signal is smaller than a first default value, at least a pulse is inserted between the adjacent pulses of the second signal for regulating the value of the frequency of the second signal, and the value of equivalent frequency corresponding to arbitrary adjacent pulse of the second signal can be greater than a second default value for avoiding the flicker phenomenon of the light emitting unit.
Description
Technical field
The present invention is relevant for a kind of light source control module and method, particularly relevant for a kind of light source control module and method that is applicable to cursor device.
Background technology
Among various computer peripheral equipments, the mouse person of being to use is one of the computer peripheral equipment of normal use, is mainly used to be specially adapted to the application on the visual pattern as a kind of computer input unit.Mouse has become indispensable input tool at present, and the idler wheel mouse by early stage develops into today gradually, and optical mouse has replaced idler wheel mouse, has very high popularity rate.
Any one optical mouse all has image detecting element, comes the image on testing surface, more after treatment, and can be with the displacement that decides mouse.Image detecting element needs the deficiency of secondary light source with compensate for brightness usually when extracting image.For the image detection device (for example camera) that extracts single image, can use flashlamp when exposure, just to allow flashlamp once bright.Yet, for will extract continuous images the time, need fixing shinny secondary light source to come the deficiency of compensate for brightness.
When practical application; consideration based on power saving and secondary light source serviceable life; usually can open or turn-off secondary light source according to the extraction frequency of image detecting element; that is; when image detecting element extracts image; secondary light source also can and then be opened, and when image detecting element was not operated, secondary light source turn-offed.At this moment, when the extraction frequency was very low, the flicker situation of secondary light source will clearly cause the discomfort of human eye.
Fig. 1 a is known optical mouse 1, and Fig. 1 b is the back side of the optical mouse 1 of Fig. 1 a.Shown in Fig. 1 b, at optical mouse 1 back side,, has an image detection district 2, in order to the image on testing surface, with the displacement of decision mouse near the place of working surface (for example desktop).
Fig. 2 is the operation chart in image detection district 2 in the known optical mouse 1.As shown in Figure 2, this optical mouse 1 has an imageing sensor 3 and a light emitting diode (LED) 4.When the user on working surface 6 during mobile optical mouse 1, light emitting diode (LED) 4 is launched a light beam 5, reflexes to imageing sensor 3 by working surface 6, the ambient brightness when improving imageing sensor 3 operations.
Generally speaking, light emitting diode (LED) 4 cooperates imageing sensor 3 operations, makes imageing sensor 3 carry out when extracting operation, and light emitting diode (LED) 4 also can be carried out light emission operation.When optical mouse 1 was in normal mode (user operates), imageing sensor 3 all operated in high frequency 1500Hz with light emitting diode (LED) 4.Yet, when entering battery saving mode when optical mouse 1 long-time no external operation, extract frequency can decline to a great extent to 30Hz to save electric current, at this moment, imageing sensor 3 operates in low frequency 30Hz, because light emitting diode (LED) 4 cooperates imageing sensor 3 operations, light emitting diode (LED) 4 also can operate in low frequency 30Hz.
Because human eye has the phenomenon of persistence of vision,, then do not have the sensation of light source scintillation when the frequency of finding light source is higher than the frequency (being generally 60Hz) that human eye can receive.Yet as mentioned above, known optical mouse 1 is under battery saving mode, imageing sensor 3 operates in low frequency 30Hz, light emitting diode (LED) 4 also with operate in low frequency 30Hz, therefore, the flicker situation of light emitting diode (LED) 4 will clearly cause the discomfort of human eye.
Summary of the invention
In view of this, purpose of the present invention just is to provide a kind of light source control module, can be used in the cursor device, when the image detecting element of cursor device operates in low frequency, can adjust the frequency of luminescence unit flicker, make its not flicker sensuously, and can take into account power saving and prolong the luminescence unit benefit in serviceable life at human eye.
For reaching above-mentioned purpose, the invention provides a kind of light source control module, be applicable to a cursor device, comprising: a processing unit, in order to export one first signal and a secondary signal; One image detecting element according to the pulse of this first signal, extracts operation in order to carry out; And a luminescence unit, according to the pulse of this secondary signal, in order to carry out light emission operation; Wherein, when the frequency values of this first signal during less than one first default value, between the adjacent pulse of this secondary signal, insert at least one pulse, to adjust the frequency values of this secondary signal, make the pairing equivalent frequency value of any adjacent pulse of this secondary signal greater than one second default value, in order to avoid this luminescence unit generation scintillation.
The present invention more provides a kind of light source control method, is applicable to a cursor device, comprises the following steps: to export one first signal and a secondary signal; According to the pulse of this first signal, carry out and extract operation; According to the pulse of this secondary signal, carry out light emission operation; Whether the frequency values of judging this first signal is less than one first default value; And if the frequency values of this first signal less than this first default value, then between the adjacent pulse of this secondary signal, insert at least one pulse, to adjust the frequency values of this secondary signal, make the pairing equivalent frequency value of any adjacent pulse of this secondary signal greater than one second default value, scintillation takes place when avoiding luminous.
Description of drawings
For above-mentioned purpose of the present invention, feature and advantage can be become apparent, especially exemplified by two preferred embodiments, and conjunction with figs., be described in detail below.
Fig. 1 a is known optical mouse.
Fig. 1 b is the back side of the optical mouse of Fig. 1 a.
Fig. 2 is the operation chart in image detection district in the known optical mouse.
Fig. 3 is the circuit blocks synoptic diagram of the light source control module of optical mouse of the present invention.
Fig. 4 represents optical mouse of the present invention when image detecting element operates in low frequency (battery saving mode), image detecting element and luminescence unit (light emitting diode, LED) the pulse waveform synoptic diagram of operation time institute's basis.
Fig. 5 is the process flow diagram of light source control method of the present invention.
The reference numeral explanation:
1～mouse; 2～image detection district; 3～imageing sensor; 4～light emitting diode (LED); 5～light beam; 6～working surface; 501～processing unit; 502～counter; 503～controller; 504～image detecting element; 505～luminescence unit (light emitting diode, LED); T, t41, t42, t43, t44, t51, t52, t53, t54～count value; F41～extraction signal; F42～luminous signal; P411, P412, P421, P422, P51, P52～pulse; S1, S2, S3, S4, S5～step; C1～judgement formula.
Embodiment
First embodiment
Fig. 3 is the circuit blocks synoptic diagram of the light source control module of optical mouse of the present invention.This optical mouse has a processing unit 501, an image detecting element 504 and a luminescence unit (light emitting diode, LED) 505.Processing unit 501 comprises a counter 502 and a controller 503.Counter 502 produces a count value T in regular turn and delivers to controller 503, and per second can be counted to count value 3000 by count value 0, in order to decision time interval amount.
Controller 503 produces one according to selected count value group and extracts a signal F41 and a luminous signal F42, and exports image detecting element 504 and luminescence unit (light emitting diode, LED) 505 respectively to.In other words, when the count value T that is exported when counter 502 met selected count value, controller 503 was sent corresponding pulse.Image detecting element 504 is carried out and is at least once extracted operation according to the pulse of extracting signal F41.In like manner, (at least light emission operation is carried out in light emitting diode, LED) 505 pulses according to luminous signal F42 to luminescence unit.Because luminescence unit (light emitting diode, LED) 503 must cooperate image detecting element 504 operations, therefore, must comprise in order to produce all count values in the count value group of extracting signal F41 in order to the count value group that produces luminous signal F42, make image detecting element 504 carry out when extracting operation, (light emitting diode LED) 503 also can be carried out light emission operation to luminescence unit
When optical mouse is in normal mode (user operates), controller 503 uses same batch total numerical value to produce and extracts signal F41 and luminous signal F42, make luminous signal F42 have identical frequency values with this with extraction signal F41, that is to say, image detecting element 504 is carried out when extracting operation, (light emitting diode LED) 503 also can be carried out light emission operation to luminescence unit.In the present embodiment, counter 502 per seconds can be counted to count value 3000 in regular turn by count value 0, if selected 2 multiple extracts signal F41 and luminous signal F42 for the count value group produces, then (light emitting diode LED) 505 all operates in frequency 1500Hz with luminescence unit for image detecting element 504.
Fig. 4 represents optical mouse of the present invention when image detecting element 504 operates in low frequency (battery saving mode), image detecting element 504 and luminescence unit (light emitting diode, LED) the pulse waveform synoptic diagram of 503 operation time institute's bases.When optical mouse does not have external operation for a long time and enters battery saving mode, controller 503 can produce and extract signal F41 according to another batch total numerical value (selected during with normal mode count value group different), make the frequency values that extracts signal F41 can decline to a great extent to 30Hz to save electric current.
As shown in Figure 4, in the superincumbent waveform, be t41 (value is 100), t42 (value is 120), t43 (value is 200) and t44 (value is 220) corresponding to the count value T that extracts signal F41.As previously mentioned, because luminescence unit (light emitting diode, LED) 505 must cooperate image detecting element 504 operations, therefore, also be the employed count value of generation luminous signal F42 (be explanation under convenient, these count values be called original count value of luminous signal F42) corresponding to count value t41, the t42, t43 and the t44 that extract signal F41.
Because judging, controller 503 learns that the frequency values 30Hz that extracts signal F41 is less than one first default value 60Hz, therefore controller 503 is between the original adjacent pulse of luminous signal F42 (P421 shown on the figure and P422), insert two pulses (P51 and P52), on real the work, can be in original count value of luminous signal F42, in per two adjacent count values, average selected new count value, or selected arbitrarily new count value, make controller 503 according to the pairing equivalent frequency value of any adjacent pulse of the selected again luminous signal F42 that count value produced greater than one second default value 60Hz (that is, the acceptable frequency of human eye), (light emitting diode, LED) 505 scintillation takes place in order to avoid luminescence unit.
As shown in Figure 4, in the waveform below, corresponding to two pulse P51 that insert and P52, t51 (value is 133), t52 (value is 143), t53 (value is 166), t54 (value is 176) is the selected new count value of controller 503, the feasible basis frequency values of the selected luminous signal F42 that count value produced again rises to 90Hz, and the pairing equivalent frequency value of any adjacent pulse of luminous signal F42 (being all 90Hz) is greater than the second default value 60Hz, utilize the persistence of vision phenomenon of human eye, (light emitting diode, LED) 505 scintillations take place and produce discomfort can to avoid luminescence unit.
Image detecting element 504 is adopted operation, superincumbent as shown in Figure 4 waveform according to the pulse (P411 and P412) of extracting signal F41.In like manner, luminescence unit (light emitting diode, LED) operate, as shown in Figure 4 waveform below by 505 pulses according to luminous signal F42 (P421, P51, P52 and P422).In the superincumbent waveform, when counter 502 is counted to count value t41 (value is 100) or t43 (value is 200), voltage level becomes HIGH by LOW, make image detecting element 504 carry out and at least once extract operation, and when counter 502 is counted to count value t42 (value is 120) or t44 (value is 220), voltage level becomes LOW by HIGH, makes image detecting element 504 stop to extract operation.Similarly, in the waveform below, when counter 502 is counted to count value t41 (value is 100), t51 (value is 133), t53 (value is 166) or t43 (value is 200), voltage level becomes HIGH by LOW, make luminescence unit (light emitting diode, LED) 505 carry out at least light emission operation, and when counter 502 is counted to count value t42 (value is 120), t52 (value is 143), t54 (value is 176) or t44 (value is 220), voltage level becomes LOW by HIGH, make that (light emitting diode, LED) 505 stop light emission operation to luminescence unit.
Second embodiment
Fig. 5 is the process flow diagram of light source control method of the present invention.For convenience of description, please refer to Fig. 3 and Fig. 4.As shown in Figure 3, this optical mouse has a processing unit 501, an image detecting element 504 and a luminescence unit (light emitting diode, LED) 505.Processing unit 501 comprises a counter 502 and a controller 503.
In step S1, counter 502 produces a count value T in regular turn and delivers to controller 503.Counter 502 per seconds can be counted to count value 3000 by count value 0, in order to decision time interval amount.In step S2, controller 503 produces one according to selected count value group and extracts a signal F41 and a luminous signal F42, and exports image detecting element 504 and luminescence unit (light emitting diode, LED) 505 respectively to.In other words, when the count value T that is exported when counter 502 met selected count value, controller 503 was sent corresponding pulse.
In step S3, image detecting element 504 is carried out and is at least once extracted operation according to the pulse of extracting signal F41.In step S4, (at least light emission operation is carried out in light emitting diode, LED) 505 pulses according to luminous signal F42 to luminescence unit.Need specify herein, because luminescence unit (light emitting diode, LED) 503 must cooperate image detecting element 504 operations, therefore, must comprise in order to produce all count values in the count value group of extracting signal F41 in order to the count value group that produces luminous signal F42, make image detecting element 504 carry out when extracting operation, (light emitting diode LED) 503 also can be carried out light emission operation to luminescence unit.
Then, in judging formula C1, controller 503 judges that whether the frequency values that extracts signal F41 is less than one first default value 60Hz.Two kinds of situations are arranged here, first kind of situation is for when optical mouse is in normal mode (user operates), the multiple of controller 503 selected 2 extracts signal F41 for the count value group produces, because counter 502 per seconds can be counted to count value 3000 in regular turn by count value 0, so extracting the frequency values of signal F41 is 1500Hz, this value is greater than the first default value 60Hz, so flow process finishes.Need remark additionally herein, in fact controller 503 uses same batch total numerical value to produce and extracts signal F41 and luminous signal F42, make luminous signal F42 have identical frequency values with this with extraction signal F41, that is to say, image detecting element 504 is carried out when extracting operation, (light emitting diode LED) 503 also can be carried out light emission operation to luminescence unit.
When second kind of situation enters battery saving mode for not having external operation for a long time when optical mouse, controller 503 can produce and extract signal F41 according to another batch total numerical value (selected during with normal mode count value group different), shown in Figure 4 as the aforementioned, in the superincumbent waveform, corresponding to the count value T that extracts signal F41 is t41 (value is 100), t42 (value is 120), t43 (value is 200) and t44 (value is 220), make the frequency values that extracts signal F41 decline to a great extent to 30Hz to save electric current.Because the frequency values 30Hz that extracts signal F41 less than the first default value 60Hz, makes judgement formula C1 for true, execution in step S5.Need remark additionally herein, because luminescence unit (light emitting diode, LED) 505 must cooperate image detecting element 504 operations, therefore, also be the employed count value of generation luminous signal F42 (be explanation under convenient, these count values be called original count value of luminous signal F42) corresponding to count value t41, the t42, t43 and the t44 that extract signal F41.
In step S5, controller 503 is between the original adjacent pulse of luminous signal F42 (P421 shown on aforesaid Fig. 4 and P422), insert two pulses (P51 and P52), on real the work, can be in original count value of luminous signal F42, in per two adjacent count values, average selected new count value, or selected arbitrarily new count value, make controller 503 according to the pairing equivalent frequency value of any adjacent pulse of the selected again luminous signal F42 that count value produced greater than one second default value 60Hz (that is, the acceptable frequency of human eye), (light emitting diode, LED) 505 scintillation takes place in order to avoid luminescence unit.
Shown in Figure 4 as the aforementioned, in the waveform below, corresponding to two pulse P51 that insert and P52, t51 (value is 133), t52 (value is 143), t53 (value is 166), t54 (value is 176) is the selected new count value of controller 503, the feasible basis frequency values of the selected luminous signal F42 that count value produced again rises to 90Hz, and the pairing equivalent frequency value of any adjacent pulse of luminous signal F42 (being all 90Hz) is greater than the second default value 60Hz, utilize the persistence of vision phenomenon of human eye, (light emitting diode, LED) 505 scintillations take place and produce discomfort can to avoid luminescence unit.Step S5 carries out later, and flow process promptly finishes.
Can remark additionally, image detecting element 504 is operated superincumbent waveform shown in Figure 4 as the aforementioned according to the pulse (P411 and P412) of extracting signal F41 herein.In like manner, (light emitting diode, LED) waveform below shown in Figure 4 is as the aforementioned operated in 505 pulses according to luminous signal F42 (P421, P51, P52 and P422) to luminescence unit.In the superincumbent waveform, when counter 502 is counted to count value t41 (value is 100) or t43 (value is 200), voltage level becomes HIGH by LOW, make image detecting element 504 carry out and at least once extract operation, and when counter 502 is counted to count value t42 (value is 120) or t44 (value is 220), voltage level becomes LOW by HIGH, makes image detecting element 504 stop to extract operation.Similarly, in the waveform below, when counter 502 is counted to count value t41 (value is 100), t51 (value is 133), t53 (value is 166) or t43 (value is 200), voltage level becomes HIGH by LOW, make luminescence unit (light emitting diode, LED) 505 carry out at least light emission operation, and when counter 502 is counted to count value t42 (value is 120), t52 (value is 143), t54 (value is 176) or t44 (value is 220), voltage level becomes LOW by HIGH, make that (light emitting diode, LED) 505 stop light emission operation to luminescence unit.
In sum, light source control module provided by the present invention and method when the extraction frequency is very low, can improve the frequency of light source.Therefore, image detecting element may operate in low frequency, and luminescence unit may operate in the acceptable frequency of human eye, utilizes the persistence of vision phenomenon of human eye, avoiding discomfort, and takes into account power saving and prolongs the luminescence unit benefit in serviceable life.
In sum; though the present invention with a preferred embodiment openly as above; right its is not in order to limit the present invention; any those skilled in the art; under the situation that does not break away from the spirit and scope of the present invention; can carry out various changes and modification, so protection scope of the present invention is as the criterion when looking the claim restricted portion that is proposed.
Claims (10)
1. a light source control module is applicable to a cursor device, comprising:
One processing unit is in order to export one first signal and a secondary signal;
One image detecting element according to the pulse of this first signal, extracts operation in order to carry out; And
One luminescence unit is according to the pulse of this secondary signal, in order to carry out light emission operation;
Wherein, when the frequency values of this first signal during less than one first default value, between the adjacent pulse of this secondary signal, insert at least one pulse, to adjust the frequency values of this secondary signal, make the pairing equivalent frequency value of any adjacent pulse of this secondary signal greater than one second default value, in order to avoid this luminescence unit generation scintillation.
2. light source control module as claimed in claim 1, wherein, this cursor device is an optical mouse.
3. light source control module as claimed in claim 1, wherein, this processing unit comprises:
One counter is in order to produce a count value; And
One controller is according to this count value, in order to export one first signal and a secondary signal.
4. light source control module as claimed in claim 1, wherein, this first default value is equal to this second default value.
5. light source control module as claimed in claim 4, wherein, this first default value and this second default value are all 60Hz.
6. a light source control method is applicable to a cursor device, comprises the following steps:
Export one first signal and a secondary signal;
According to the pulse of this first signal, carry out and extract operation;
According to the pulse of this secondary signal, carry out light emission operation;
Whether the frequency values of judging this first signal is less than one first default value; And
If the frequency values of this first signal is less than this first default value, then between the adjacent pulse of this secondary signal, insert at least one pulse, to adjust the frequency values of this secondary signal, make the pairing equivalent frequency value of any adjacent pulse of this secondary signal greater than one second default value, scintillation takes place when avoiding luminous.
7. light source control method as claimed in claim 6, wherein, this cursor device is an optical mouse.
8. light source control method as claimed in claim 6, wherein, this step of exporting this first signal and this secondary signal comprises:
Produce a count value; And
According to this count value, export this first signal and this secondary signal.
9. light source control method as claimed in claim 6, wherein, this first default value is equal to this second default value.
10. light source control method as claimed in claim 9, wherein, this first default value and this second default value are all 60Hz.
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| Application Number | Priority Date | Filing Date | Title |
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| CNB2004100041525A CN100451932C (en) | 2004-02-13 | 2004-02-13 | Light source control module and method suitable for cursor device |
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| Application Number | Priority Date | Filing Date | Title |
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| CNB2004100041525A CN100451932C (en) | 2004-02-13 | 2004-02-13 | Light source control module and method suitable for cursor device |
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| CN1655183A CN1655183A (en) | 2005-08-17 |
| CN100451932C true CN100451932C (en) | 2009-01-14 |
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| CN103838362B (en) * | 2012-11-27 | 2017-10-03 | 原相科技股份有限公司 | Gesture recognition device and combined optical device |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH1185392A (en) * | 1997-09-12 | 1999-03-30 | Atsuden Kk | Mouse for computer |
| CN1294367A (en) * | 1999-10-28 | 2001-05-09 | 惠普公司 | Forecast pulsive lighting to surface by utilizing micro-structure pilot tech |
| CN2456225Y (en) * | 2000-11-10 | 2001-10-24 | 胡赓白 | Improved optical mouse |
| TW573765U (en) * | 2003-06-20 | 2004-01-21 | Kye Systems Corp | Optical pointer device capable of adjusting illumination |
-
2004
- 2004-02-13 CN CNB2004100041525A patent/CN100451932C/en not_active Expired - Lifetime
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH1185392A (en) * | 1997-09-12 | 1999-03-30 | Atsuden Kk | Mouse for computer |
| CN1294367A (en) * | 1999-10-28 | 2001-05-09 | 惠普公司 | Forecast pulsive lighting to surface by utilizing micro-structure pilot tech |
| CN2456225Y (en) * | 2000-11-10 | 2001-10-24 | 胡赓白 | Improved optical mouse |
| TW573765U (en) * | 2003-06-20 | 2004-01-21 | Kye Systems Corp | Optical pointer device capable of adjusting illumination |
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| CN1655183A (en) | 2005-08-17 |
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