CN100421056C - Apparatus for regulating and controlling optical mouse light source by pulse width - Google Patents
Apparatus for regulating and controlling optical mouse light source by pulse width Download PDFInfo
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- CN100421056C CN100421056C CNB2004100040359A CN200410004035A CN100421056C CN 100421056 C CN100421056 C CN 100421056C CN B2004100040359 A CNB2004100040359 A CN B2004100040359A CN 200410004035 A CN200410004035 A CN 200410004035A CN 100421056 C CN100421056 C CN 100421056C
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- light source
- width modulation
- pulse wave
- optical mouse
- wave width
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Abstract
The present invention relates to a device for regulating and controlling light sources of an optical mouse by pulse width, which comprises an image sensor, a light source, a pulse width regulating generator and a light source controller, wherein the image sensor is used for capturing images, the light source is used for providing the needed brightness when the image sensor is used for capturing the images, the pulse width regulating generator is used for generating at least one regulation waveform with pulse width, the light source controller uses the regulation waveform with the pulse width to off and on light the light source, and the light source of an optical mouse has the function of elastic control. The power consumption can be averagely dispersed over at each time point; when the optical mouse is in a pause mode, the movement function and the alarm function are carried out.
Description
Technical field
The invention relates to the technical field of optical mouse, refer to a kind of especially with pulse wave width modulation (PulseWidth Modulation, PWM) device of control optical mouse light source.
Background technology
General known optical mouse, be mouse pad or other objects to be carried out rayed with a light emitting diode (LED), again by the image frame (Frame) on the image sensor acquisition mouse pad, image relatively and obtain the motion-vector of this optical mouse, and judge direction and the distance that optical mouse moves.And if the known optical slide-mouse is determined with shutter mode the control king of light-emitting diode lighting, when being illustrated in figure 1 as shutter mode and closing to the control timing figure of light-emitting diode lighting, wherein, Gu the frame signal is the start signal or the sync signal of each image frame, light emitting diode is all lighted during optical mouse is used (Active), and all do not light during not using (Idle) in optical mouse, therefore, light a lamp/time of turning off the light can cross over whole picture frame.To the control timing figure of light-emitting diode lighting, wherein, during optical mouse was used (Active), whether lighting of light emitting diode was to change with the work shutter, only just lights light emitting diode when shutter starts when Fig. 2 then was shown as the shutter mode unlatching.Therefore as can be known, the light source of known optical mouse is permanent bright during video imaging.
With aforesaid optical mouse, become to survey the induction sensitivity of device very high and to light when very sensitive when image, since light emitting diode light be continue during the shutter opening or even during whole optical mouse uses (Active), even and might cause shutter can't dwindle again and image that image sensor is responded to still has saturated existing picture, and then cause optical mouse to operate.In addition, because light emitting diode continues to light, it is excessive to cause immediate current to consume, use for standard such as USB park mode (Suspend) etc., because USB interface maximum only provides 500 μ A electric currents under the park mode, can't be up to specification and can cause the USB optical mouse to have, therefore be difficult to realize moving the function of waking (Motion Wake Up).
Summary of the invention
One of purpose of the present invention is to provide a kind of device with pulse wave width modulation control optical mouse light source, and dispersion that can the light source power consumption is average reduces.
Two of purpose of the present invention is to provide a kind of device with pulse wave width modulation control optical mouse light source, the optical mouse light source is lit a lamp have more flexible control.Can further prevent light source from can not cross bright according to this and image that cause image sensor to respond to has saturated phenomenon.
Three of purpose of the present invention is to provide a kind of device with pulse wave width modulation control optical mouse light source, can make the USB optical mouse when park mode (Suspend), can move the function of waking (Motion Wake Up).
For achieving the above object, the device with pulse wave width modulation control optical mouse light source provided by the invention comprises:
One image sensor is in order to pick-up image;
One light source provides this image sensor pick-up image required brightness;
One pulse wave width modulation generator is in order to produce at least one pulse wave width modulation waveform; And
One light source controller uses this pulse wave width modulation waveform intermittently to light this light source.
The device of described pulse wave width modulation control optical mouse light source, wherein this light source controller is between the operating period, to come making-breaking point bright light source with the pulse wave width modulation waveform in optical mouse.
The device of described pulse wave width modulation control optical mouse light source, wherein this pulse wave width modulation generator comprises at least one frequency eliminator, it is in order to produce this at least one pulse wave width modulation waveform to the clock signal frequency elimination.
The device of described pulse wave width modulation control optical mouse light source, wherein this light source is a light emitting diode.
The present invention also provides a kind of device of pulse wave width modulation control optical mouse light source, comprising:
One image sensor is in order to pick-up image;
One shutter, it makes image sensor energy pick-up image when opening;
One light source provides this image sensor pick-up image required brightness;
One pulse wave width modulation generator is in order to produce at least one pulse wave width modulation waveform; And
One light source controller uses this pulse wave width modulation waveform and intermittently light this light source when this shutter is opened.
The device of described pulse wave width modulation control optical mouse light source, wherein this shutter is for periodically opening.
The device of described pulse wave width modulation control optical mouse light source, wherein this light source controller between the operating period, comes making-breaking point bright light source with the pulse wave width modulation waveform in optical mouse.
The device of described pulse wave width modulation control optical mouse light source, wherein this pulse wave width modulation generator comprises at least one frequency eliminator, it transfers living waveform in order to the clock signal frequency elimination is produced this at least one pulse bandwidth.
The device of described pulse wave width modulation control optical mouse light source, wherein this light source is a light emitting diode.
Description of drawings
Fig. 1 is known optical mouse control timing figure to light-emitting diode lighting when shutter mode is closed.
Fig. 2 is known optical mouse control timing figure to light-emitting diode lighting when shutter mode is opened.
Fig. 3 is the function square of the present invention with the device of pulse wave width modulation control optical mouse light source.
Fig. 4 is for showing the structure according to PWM generator of the present invention.
Fig. 5 is the working timing figure of the present invention with the device of pulse wave width modulation control optical mouse light source.
Fig. 6 is another working timing figure of controlling the device of optical mouse light source with pulse wave width modulation of the present invention.
Fig. 7 A and 7B show that respectively known technology and light emitting diode power consumption of the present invention change waveform.
Embodiment
For more understanding technology contents of the present invention, be described as follows especially exemplified by a preferred embodiment.
Fig. 3 shows the function square of controlling the device of optical mouse light source with pulse wave width modulation of the present invention, it mainly includes shutter 31, image sensor 32, light source 33, light source controller 34, pulse wave width modulation (PWM) generator 35, wherein, this light source 33 is preferably a light emitting diode (LED), this light source controller 34 is that user mode (Active/Idle) and the shutter mode according to optical mouse produces the light source control signal, the PWM waveform combination that this light source control signal and this PWM generator 35 are produced, and control whether lighting of this light source 33.
Fig. 4 shows the structure of this PWM generator 35, it is come clock signal CLK frequency elimination is produced required PWM waveform by at least one frequency eliminator 351,352, in present embodiment, PWM generator 35 has two frequency eliminators 351,352 being respectively that the clock signal of f is divided by 2 and divided by 4 with frequency, and produce frequency is the PWM waveform A of f/2 and the PWM waveform B that frequency is f/4, this two PWM waveform A and the visual actual needs of B and select an output, for example, under the lower situation of environment induction sensitivity dark or image sensor 32, select the higher PWM waveform A output of frequency.
Fig. 5 shows a working timing figure of controlling the device of optical mouse light source with pulse wave width modulation of the present invention, and please refer to Fig. 3, when optical mouse starts, its shutter 31 is periodically to open, so that image sensor 32 can capture the image on the mouse pad, and when using optical mouse (Active), close as shutter mode, this light source controller 34 is low level during producing that light source control signal C1 are high levle during optical mouse is used (Active) and not using (Idle) in optical mouse, the PWM waveform of this light source control signal C1 and 35 outputs of PWM generator is combined into PWM control light source switch signal D1, in order to a bright light source 33.
Fig. 6 shows another working timing figure of controlling the device of optical mouse light source with pulse wave width modulation of the present invention, it is presented at when using optical mouse (Active), open as shutter mode, it is high levle when shutter is opened that this light source controller 34 produces light source control signal C2, it during shutter close low level, the PWM waveform of this light source control signal C2 and 35 outputs of PWM generator is combined into PWM control light source switch signal D2, in order to a bright light source 33.
By above-mentioned working timing figure as can be known, the present invention lights light emitting diode with the PWM waveform, therefore, no matter shutter mode is opened or is closed, the point of light emitting diode all is intermittently to light, but not continue to cause the saturated existing picture of image sensor so can make light source can not cross bright during the shutter opening or during the whole optical mouse use (Active).In addition, compared to known light emitting diode is to continue to light and to cause immediate current to consume excessive (shown in Fig. 7 A during imaging, the complete bright power consumption average out to of optical mouse light emitting diode is counted mA at present), the present invention is because light emitting diode is intermittently to light, so it is less that immediate current consumes, shown in Fig. 7 B, the on average power consumption less than 250 μ A of its light emitting diode, so can meet the standard of USB park mode (Suspend), make the USB optical mouse after entering park mode, can be moved and wake (Motion Wakeup) function.Again, PWM generator of the present invention can produce the PWM waveform of multiple different frequency, select an output in response to different demands, for example, under the lower situation of environment induction sensitivity dark or image sensor 32, select the higher PWM waveform output of frequency, make light emitting diode produce brighter light source, and reach the purpose of simple and easy control light-source brightness.
The foregoing description only is to give an example for convenience of description, and the interest field that the present invention advocated should be as the criterion so that claim is described certainly, but not only limits to the foregoing description.
Claims (7)
1. the device of pulse wave width modulation control optical mouse light source comprises:
One image sensor is in order to pick-up image;
One shutter, it makes the image sensor pick-up image when opening;
One light source provides this image sensor pick-up image required brightness;
One pulse wave width modulation generator is in order to produce at least one pulse wave width modulation waveform; And
One light source controller, produce a light source control signal in order to user mode according to this optical mouse, this light source control signal and this pulse width modulation waveform are combined into pulse width modulation control light source switch signal and control this light source, to use this pulse wave width modulation waveform intermittently to light this light source, make in each time of this shutter opening and intermittently light this light source.
2. the device of pulse wave width modulation control optical mouse light source as claimed in claim 1, it is characterized in that, wherein this pulse wave width modulation generator comprises at least one frequency eliminator, and it is in order to produce this at least one pulse wave width modulation waveform to a clock signal frequency elimination.
3. the device of pulse wave width modulation control optical mouse light source as claimed in claim 2 is characterized in that wherein this light source is a light emitting diode.
4. the device of pulse wave width modulation control optical mouse light source comprises:
One image sensor is in order to pick-up image;
One shutter, it makes image sensor energy pick-up image when opening;
One light source provides this image sensor pick-up image required brightness;
One pulse wave width modulation generator is in order to produce at least one pulse wave width modulation waveform; And
One light source controller, produce a light source control signal in order to the foundation shutter mode, this light source control signal and this pulse width modulation waveform are combined into pulse width modulation control light source switch signal and control this light source, intermittently light this light source to use this pulse wave width modulation waveform when this shutter is opened.
5. the device of pulse wave width modulation control optical mouse light source as claimed in claim 4 is characterized in that wherein this shutter is for periodically opening.
6. the device of pulse wave width modulation control optical mouse light source as claimed in claim 4 is characterized in that wherein this pulse wave width modulation generator comprises at least one frequency eliminator, and it transfers living waveform in order to the clock signal frequency elimination is produced this at least one pulse bandwidth.
7. the device of pulse wave width modulation control optical mouse light source as claimed in claim 6 is characterized in that wherein this light source is a light emitting diode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004100040359A CN100421056C (en) | 2004-02-04 | 2004-02-04 | Apparatus for regulating and controlling optical mouse light source by pulse width |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004100040359A CN100421056C (en) | 2004-02-04 | 2004-02-04 | Apparatus for regulating and controlling optical mouse light source by pulse width |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1652144A CN1652144A (en) | 2005-08-10 |
| CN100421056C true CN100421056C (en) | 2008-09-24 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2004100040359A Expired - Fee Related CN100421056C (en) | 2004-02-04 | 2004-02-04 | Apparatus for regulating and controlling optical mouse light source by pulse width |
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Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101488058B (en) * | 2008-01-14 | 2013-05-01 | 原相科技股份有限公司 | Optical sensing apparatus and its operation method |
Citations (3)
| 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 |
-
2004
- 2004-02-04 CN CNB2004100040359A patent/CN100421056C/en not_active Expired - Fee Related
Patent Citations (3)
| 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 |
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| CN1652144A (en) | 2005-08-10 |
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Granted publication date: 20080924 Termination date: 20170204 |