TWI780624B - Optical mouse and light source control method of the optical mouse for an application in a moving path detection - Google Patents
Optical mouse and light source control method of the optical mouse for an application in a moving path detection Download PDFInfo
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Abstract
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本發明涉及一種光學滑鼠,尤指對於光學滑鼠應用於位移偵測之發光方法的控制。The invention relates to an optical mouse, in particular to the control of the light-emitting method applied to the displacement detection of the optical mouse.
光學滑鼠為常見搭配電子裝置使用之輸入裝置,光學滑鼠利用光源向外發射光線,再擷取光線所照射之處的影像,透過分析影像來判斷光學滑鼠的移動路徑,以對應控制電子裝置所顯示之游標位置。當光源持續的發射光線時,將使得光學滑鼠持續消耗電能。The optical mouse is a common input device used with electronic devices. The optical mouse uses a light source to emit light, and then captures the image of the place where the light shines. By analyzing the image, it can judge the moving path of the optical mouse to control the electronic device accordingly. The cursor position displayed on the device. When the light source continuously emits light, the optical mouse will continue to consume power.
為了減少光學滑鼠所消耗的電能,現有技術中係針對光源的發光時間加以控制,如圖8所示,將光源的發光週期分為發光時間段P 1及閒置時間段P 2,光源於發光時間段P 1中依照設定的頻率發光,並於閒置時間段P 2中關閉光源,以減少光源發射光線的時間,來達到節能的效果。但光源關閉的時間與光學滑鼠的移動行程無關,光學滑鼠在閒置時間段P 2的移動行程藉由前後發光時間段P 1的移動行程來推估。則請參閱圖9A及圖9B所示,假設發光滑鼠實際的移動路徑為R 1,而經由現有技術之光源控制方法運算後,呈現於電子裝置之顯示路徑為R 2,其中於發光時間段P 1所偵測到的路徑為R 21,於閒置時間段P 2所推估的移動路徑為R 22,比對圖9A及圖9B可得知,由於推估的移動路徑R 22僅能依照前後兩段的實際偵測路徑R 21來進行推估,則會產生顯示路徑R 2的細節與實際的移動路徑R 1之細節有所落差,導致顯示路徑R 2無法完全反映出實際移動路徑R 1的問題。 In order to reduce the power consumption of the optical mouse, in the prior art, the lighting time of the light source is controlled. As shown in FIG. 8 , the lighting cycle of the light source is divided into a lighting time period P1 and an idle time period P2. Lights up according to the set frequency in the time period P1, and turns off the light source in the idle time period P2, so as to reduce the time for the light source to emit light, so as to achieve the effect of energy saving. However, the time when the light source is turned off has nothing to do with the moving distance of the optical mouse. The moving distance of the optical mouse in the idle time period P2 is estimated by the moving distance of the light - emitting time period P1 before and after. Please refer to FIG. 9A and FIG. 9B , assuming that the actual moving path of the luminous mouse is R 1 , and after being calculated by the light source control method in the prior art, the display path presented on the electronic device is R 2 , wherein during the lighting time period The path detected by P 1 is R 21 , and the moving path estimated by P 2 during the idle period is R 22 . Comparing Fig. 9A and Fig. 9B , it can be known that the estimated moving path R 22 can only be calculated according to Estimating the actual detection path R 21 of the two sections before and after, there will be a gap between the details of the displayed path R 2 and the details of the actual moving path R 1 , resulting in the fact that the displayed path R 2 cannot fully reflect the actual moving path R 1 question.
有鑑於此,本發明係提出光學滑鼠的光源控制方法,以期能在省電的前提下,仍能維持呈現實際移動路徑的效果。In view of this, the present invention proposes a light source control method for an optical mouse, in order to maintain the effect of presenting the actual moving path under the premise of saving power.
為達到前述之發明目的,本發明提供一種光學滑鼠應用於位移偵測的光源控制方法,其包含一第一發光模式及一第二發光模式,其中: 於所述第一發光模式下,係發射多個第一光訊號;及 於所述第二發光模式下,係發射一第二光訊號; 其中,在執行兩次該第一發光模式之間係執行該第二發光模式,且每一所述第一光訊號的大小高於每一該第二光訊號的大小。 In order to achieve the aforementioned object of the invention, the present invention provides a light source control method for optical mouse applied to displacement detection, which includes a first light-emitting mode and a second light-emitting mode, wherein: In the first light emitting mode, a plurality of first light signals are emitted; and In the second light emitting mode, a second light signal is emitted; Wherein, the second light emitting mode is executed between performing the first light emitting mode twice, and the magnitude of each of the first light signals is higher than that of each of the second light signals.
另一方面,本發明亦提供一種光學滑鼠,其包括: 一殼體; 一光源,該光源設置於該殼體中並朝該殼體外提供光訊號; 一控制單元,其設置於該殼體中並控制該光源之發光模式,其包括執行一第一發光模式及一第二發光模式,其中: 於所述第一發光模式下,該光源係發射多個該第一光訊號; 於所述第二發光模式下,該光源係發射至少一第二光訊號; 其中,在執行兩次該第一發光模式之間係執行該第二發光模式,且每一所述第一光訊號的大小高於每一該第二光訊號的大小。 On the other hand, the present invention also provides an optical mouse, which includes: a shell; a light source, which is arranged in the housing and provides light signals to the outside of the housing; A control unit, which is arranged in the housing and controls the light emitting mode of the light source, which includes executing a first light emitting mode and a second light emitting mode, wherein: In the first light emitting mode, the light source emits a plurality of the first light signals; In the second light emitting mode, the light source emits at least one second light signal; Wherein, the second light emitting mode is executed between performing the first light emitting mode twice, and the magnitude of each of the first light signals is higher than that of each of the second light signals.
本發明的優點在於,藉由發射較小的第二光訊號,來達到省電的功效,但於第二發光模式下仍有發射第二光訊號,以擷取對應第二光訊號的反射圖像,來維持對光學滑鼠之真實移動路徑的判斷準確率。The advantage of the present invention is that by emitting a smaller second light signal, the effect of power saving is achieved, but the second light signal is still emitted in the second light-emitting mode to capture the reflection image corresponding to the second light signal image to maintain the accuracy of judging the real moving path of the optical mouse.
以下配合圖式及本發明之實施例,進一步闡述本發明為達成預定發明目的所採取的技術手段,其中圖式僅為了說明目的而已被簡化,並通過描述本發明的元件和組件之間的關係來說明本發明的結構或方法發明,因此,圖中所示的元件不以實際數量、實際形狀、實際尺寸以及實際比例呈現,尺寸或尺寸比例已被放大或簡化,藉此提供更好的說明,已選擇性地設計和配置實際數量、實際形狀或實際尺寸比例,而詳細的元件佈局可能更複雜。The technical means adopted by the present invention to achieve the intended purpose of the invention are further elaborated below in conjunction with the drawings and embodiments of the present invention, wherein the drawings are simplified for illustrative purposes only, and by describing the relationship between elements and components of the present invention To illustrate the structure or method invention of the present invention, therefore, the elements shown in the drawings are not presented in actual number, actual shape, actual size and actual ratio, and the size or size ratio has been enlarged or simplified to provide better description , the actual number, actual shape or actual size ratio has been selectively designed and configured, and the detailed component layout may be more complicated.
請參閱圖1及圖2所示,本發明之光學滑鼠1包含有一殼體10、一光源20、一控制單元30及一感測單元40。該光源20、該控制單元30及該感測單元40均設置於該殼體10中,該光源20及該感測單元40電連接該控制單元30,該光源20所發射之光線21朝向該殼體10外,亦即該光源20朝該殼體10外提供一光訊號,當光線21照射到該殼體10之底面所置放的工作表面後,反射光由該感測單元40接收,進而產生對應的反射圖像,藉由該反射圖像判斷該光學滑鼠1之移動行程。Please refer to FIG. 1 and FIG. 2 , the
本實施例之光學滑鼠之光源控制方法係被應用於該光學滑鼠的位移偵測中,其中光學滑鼠的位移包含位移為零的靜止狀態以及位移不為零的移動狀態。請參閱圖2及圖3所示,該光源控制方法係使用該控制單元30係控制該光源20之發光模式,該光源20以第一發光模式M
1與第二發光模式M
2發射該光訊號。於該第一發光模式M
1下,該光源20以一第一頻率ƒ
11發射多個第一光訊號S
11,亦即發射該第一光訊號S
11的週期時間為1/ƒ
11,其中發射該第一光訊號S
11的時間長度為一第一時間t
11,且該第一光訊號S
11具有一第一光通量Φ
11;於該第二發光模式M
2下,該光源20以一第二頻率ƒ
21發射多個第二光訊號S
21,亦即發射該第二光訊號S
21的週期時間為1/ƒ
21,其中發射該第二光訊號S
21的時間長度為一第二時間t
21,且該第二光訊號S
21具有一第二光通量Φ
21。其中,該第一光訊號S
11的大小高於該第二光訊號S
21的大小,在一實施例中,該大小係指光訊號的光能,亦即光訊號的光通量與發射時間的乘積,該第一光訊號S
11的光能等於該第一時間t
11與該第一光通量Φ
11的乘積,該第二光訊號S
21的光能等於該第二時間t
21與該第二光通量Φ
21的乘積。請參閱如圖3所示之實施例,該第一光通量Φ
11等於該第二光通量Φ
21,但由於該第一時間t
11大於該第二時間t
21,故該第一時間t
11與該第一光通量Φ
11的乘積大於該第二時間t
21與第二光通量Φ
21的乘積,因此該第一光訊號S
11的大小大於該第二光訊號S
21的大小。請參閱如圖4所示之實施例,該第一時間t
12等於該第二時間t
22,但該第一光通量Φ
12大於該第二光通量Φ
22,故該第一時間t
12與該第一光通量Φ
12的乘積大於該第二時間t
22與第二光通量Φ
22的乘積,因此該第一光訊號S
12的大小大於該第二光訊號S
22的大小。在其餘實施例中,亦可使該第一時間不同於該第二時間、該第一光通量不同於該第二光通量,但使該第一時間與該第一光通量的乘積大於該第二時間與該第二光通量的乘積,即可符合該第一光訊號的大小大於該第二光訊號的大小。
The light source control method of the optical mouse in this embodiment is applied to the displacement detection of the optical mouse, wherein the displacement of the optical mouse includes a static state where the displacement is zero and a moving state where the displacement is not zero. Please refer to FIG. 2 and FIG. 3, the light source control method uses the
雖然在該第二發光模式M 2所發射的該第二光訊號S 21的大小係小於在該第一發光模式M 1所發射的該第一光訊號S 11,但因反射圖像在通過一高頻濾波器濾除低頻差異,僅保留影像之文理細節等高頻部份後,不同大小的光訊號所對應之反射圖像具有相近的影像品質,因此還能進一步用來判斷且提升光學滑鼠之移動路徑時的精準度。請參閱圖5A及圖5B所示,以光學滑鼠位於相同位置為例,在該第一發光模式M 1下所獲得的第一原始反射圖像I 11,經過高頻濾波器處理後為第一過濾圖像I 12,在該第二發光模式M 2下所獲得之第二原始反射圖像I 21,經過高頻濾波器處理後為第二過濾圖像I 22,由於光訊號的大小不同,故該第一原始反射圖像I 11與該第二原始反射圖像I 21有明顯的亮度差異,但經過高頻濾波器處理後,該第一過濾圖像I 12與該第二過濾圖像I 22幾無差異,且其圖像均足以作為光學滑鼠移動路徑之判斷。 Although the magnitude of the second light signal S 21 emitted in the second light emitting mode M 2 is smaller than that of the first light signal S 11 emitted in the first light emitting mode M 1 , since the reflected image passes through a The high-frequency filter filters out the low-frequency differences, and after retaining only the high-frequency parts such as the texture details of the image, the reflection images corresponding to different sizes of optical signals have similar image quality, so it can be further used to judge and improve optical smoothness. The accuracy of the mouse's movement path. Please refer to FIG. 5A and FIG. 5B , taking the optical mouse at the same position as an example, the first original reflection image I 11 obtained in the first light-emitting mode M 1 is processed by a high-frequency filter into the first A filtered image I 12 , the second original reflection image I 21 obtained in the second light emitting mode M 2 is processed by a high-frequency filter to become the second filtered image I 22 , due to the different magnitudes of light signals , so the first original reflected image I 11 and the second original reflected image I 21 have obvious difference in brightness, but after the high-frequency filter processing, the first filtered image I 12 and the second filtered image Like I 22 , there is almost no difference, and its images are sufficient to judge the moving path of an optical mouse.
另外,於該第一發光模式M
1及該第二發光模式M
2發射光訊號的頻率可有所選擇。在一實施例中(如圖3所示),在該第一發光模式M
1下發射該第一光訊號S
11的該第一頻率ƒ
11等於在該第二發光模式M
2下發射該第二光訊號S
21的該第二頻率ƒ
21,亦即發射該第一光訊號S
11的週期時間1/ƒ
11等於發射該第二光訊號S
21的週期時間1/ƒ
21。在另一實施例中(如圖6所示),為了提高該第二發光模式M
2下的幀率,在該第一發光模式M
1下發射該第一光訊號S
13的該第一頻率ƒ
13小於在該第二發光模式M
2下發射該第二光訊號S
23的該第二頻率ƒ
23,亦即發射該第一光訊號S
13的週期時間1/ƒ
13大於發射該第二光訊號S
23的週期時間1/ƒ
23,藉由縮短發射第二光訊號S
23的週期時間(即提高發射該第二光訊號S
23的頻率),使得該第二發光模式M
2在較短時間內獲得同樣多的反射圖像、或在相同時間內獲得更多反射圖像。
In addition, the frequencies of the light signals emitted in the first light emitting mode M1 and the second light emitting mode M2 can be selected. In one embodiment (as shown in FIG. 3 ), the first frequency ƒ 11 of the first light signal S 11 emitted in the first light emitting mode M1 is equal to the first frequency ƒ 11 emitted in the second light emitting mode M2. The second frequency ƒ 21 of the second optical signal S 21 , that is, the
以圖3所示之實施例為例,發射該第一光訊號S
11的週期時間1/ƒ
11等於發射該第一光訊號S
11的時間長度t
11加上隨後的第一空白時間t
b11,發射該第二光訊號S
21的週期時間1/ƒ
21等於發射該第二光訊號S
21的時間長度t
21加上隨後的第二空白時間t
b21,由於時間長度t
11大於時間長度t
21,故使第一空白時間t
b11小於第二空白時間t
b21,以獲得週期時間1/ƒ
11等於週期時間1/ƒ
21。
Taking the embodiment shown in FIG. 3 as an example, the
以圖6所示之實施例為例,發射該第一光訊號S
13的週期時間1/ƒ
13等於發射該第一光訊號S
13的時間長度t
13加上隨後的第一空白時間t
b13,發射該第二光訊號S
23的週期時間1/ƒ
23等於發射該第二光訊號S
23的時間長度t
23加上隨後的第二空白時間t
b23,由於時間長度t
13大於時間長度t
23,故使第一空白時間t
b13等於第二空白時間t
b23,以獲得週期時間1/ƒ
13大於週期時間1/ƒ
23。
Taking the embodiment shown in FIG. 6 as an example, the
雖然經過前述高頻濾波器的處理,預期可獲得幾無差異的過濾圖像供後續判斷光學滑鼠的移動路徑,但仍可透過發光模式的控制來避免因光訊號較小而產生誤判情形。請參閱圖7所示,當執行該第一發光模式M 1時,將透過發射該第一光訊號S 14所獲得的過濾圖像而判斷出光學滑鼠的移動路徑,當進入該第二發光模式M 2時,先依照在前的該第一發光模式M 1的多次該第一光訊號S 14所判斷出之移動路徑來推算一預測路徑,在發射該第二光訊號S 24後,透過對應該些第二光訊號S 24所獲得的過濾圖像而判斷出之光學滑鼠的移動路徑,係與該預測路徑加以比對,如偏離該預測路徑超過一門檻值,則可能為因該第二光訊號S 24較小所產生的誤判情形,此時提前結束該第二發光模式M 2的執行時間而回到該第一發光模式M 1,以維持判斷路徑的準確率。具體而言,假設在該第一發光模式M 1下發射四次第一光訊號S 14後,切換至該第二發光模式M 2發射四次第二光訊號S 24,但在前述情形下,由於在第二次發射第二光訊號S 24時就判斷偏離預測路徑超過門檻值,則提前結束該第二發光模式M 2,使得在此情形下該第二發光模式M 2中發射該第二光訊號S 24的次數少於正常的預設次數。 Although after the above-mentioned high-frequency filter processing, it is expected to obtain a filtered image with almost no difference for subsequent judgment of the optical mouse's moving path, it is still possible to avoid misjudgment due to small light signals through the control of the light-emitting mode. Please refer to FIG. 7, when the first light emitting mode M1 is executed, the moving path of the optical mouse will be judged through the filtered image obtained by emitting the first light signal S14 , and when entering the second light emitting mode In the mode M2 , a predicted path is first calculated according to the moving path determined by the first light signal S14 in the previous first lighting mode M1, and after the second light signal S24 is emitted, The moving path of the optical mouse judged by the filtered images corresponding to the second optical signals S24 is compared with the predicted path, if the deviation from the predicted path exceeds a threshold value, it may be due to In case of misjudgment caused by the small second light signal S 24 , the execution time of the second light emitting mode M 2 is terminated earlier and the first light emitting mode M 1 is returned to maintain the accuracy of the judgment path. Specifically, suppose that after emitting the first light signal S 14 four times in the first light emitting mode M 1 , switch to the second light emitting mode M 2 to emit the second light signal S 24 four times, but in the aforementioned circumstances, Since it is judged that the deviation from the predicted path exceeds the threshold value when the second light signal S 24 is emitted for the second time, the second light emitting mode M 2 is terminated in advance, so that the second light emitting mode M 2 is emitted in this situation. The frequency of the optical signal S 24 is less than the normal preset frequency.
以上所述僅是本發明的實施例而已,並非對本發明做任何形式上的限制,雖然本發明已以實施例揭露如上,然而並非用以限定本發明,任何所屬技術領域中具有通常知識者,在不脫離本發明技術方案的範圍內,當可利用上述揭示的技術內容作出些許更動或修飾為等同變化的等效實施例,但凡是未脫離本發明技術方案的內容,依據本發明的技術實質對以上實施例所作的任何簡單修改、等同變化與修飾,均仍屬於本發明技術方案的範圍內。The above description is only an embodiment of the present invention, and does not limit the present invention in any form. Although the present invention has been disclosed as above with the embodiment, it is not intended to limit the present invention. Anyone with ordinary knowledge in the technical field, Within the scope of not departing from the technical solution of the present invention, when the technical content disclosed above can be used to make some changes or be modified into equivalent embodiments with equivalent changes, but all the content that does not depart from the technical solution of the present invention, according to the technical essence of the present invention Any simple modifications, equivalent changes and modifications made to the above embodiments still fall within the scope of the technical solutions of the present invention.
10:外殼 20:光源 21:光線 30:控制單元 40:感測單元 M 1:第一發光模式 M 2:第二發光模式 S 11、S 12、S 13、S 14:第一光訊號 S 21、S 22、S 23、S 24:第二光訊號 ƒ 11、ƒ 13:第一頻率 ƒ 21、ƒ 23:第二頻率 t 11、t 12、t 13:第一時間 t 21、t 22、t 23:第二時間 t b11、t b13:第一空白時間 t b21、t b23:第二空白時間 Φ 11、Φ 12:第一光通量 Φ 21、Φ 22:第二光通量 10: shell 20: light source 21: light 30: control unit 40: sensing unit M 1 : first light emitting mode M 2 : second light emitting mode S 11 , S 12 , S 13 , S 14 : first light signal S 21 . _ _ _ _ _ _ _ _ _ _ _ t 23 : second time t b11 , t b13 : first blank time t b21 , t b23 : second blank time Φ 11 , Φ 12 : first luminous flux Φ 21 , Φ 22 : second luminous flux
圖1為本發明之光學滑鼠的側視剖面示意圖; 圖2為本發明之光學滑鼠的部份元件方塊圖; 圖3為本發明之光學滑鼠應用於位移偵測的控制方法之第一實施例的發光時序圖; 圖4為本發明之光學滑鼠應用於位移偵測的控制方法之第二實施例的發光時序圖; 圖5A為在第一發光模式下所獲得的反射圖像及過濾圖像; 圖5B為在第二發光模式下所獲得的反射圖像及過濾圖像; 圖6為本發明之光學滑鼠應用於位移偵測的控制方法之第三實施例的發光時序圖; 圖7為本發明之光學滑鼠應用於位移偵測的控制方法之第四實施例的發光時序圖; 圖8為現有技術之光學滑鼠應用於位移偵測的控制方法之發光時序圖; 圖9A為光學滑鼠的實際移動路徑; 圖9B為以現有技術之控制方法所判斷出之移動路徑。 Fig. 1 is the side view sectional schematic diagram of optical mouse of the present invention; Fig. 2 is a block diagram of some components of the optical mouse of the present invention; FIG. 3 is a light-emitting timing diagram of the first embodiment of the control method of the optical mouse applied to displacement detection according to the present invention; 4 is a light-emitting timing diagram of the second embodiment of the control method of the optical mouse applied to displacement detection according to the present invention; FIG. 5A is a reflected image and a filtered image obtained in the first lighting mode; FIG. 5B is a reflected image and a filtered image obtained in the second light emitting mode; 6 is a light-emitting timing diagram of the third embodiment of the control method of the optical mouse applied to displacement detection according to the present invention; 7 is a light-emitting timing diagram of the fourth embodiment of the control method of the optical mouse applied to displacement detection according to the present invention; FIG. 8 is a light-emitting timing diagram of a control method for applying an optical mouse to displacement detection in the prior art; Fig. 9A is the actual moving path of the optical mouse; FIG. 9B is a moving path determined by the control method in the prior art.
M 1:第一發光模式 M 2:第二發光模式 S 11:第一光訊號 S 21:第二光訊號 ƒ 11:第一頻率 ƒ 21:第二頻率 t 11:第一時間 t 21:第二時間 t b11:第一空白時間 t b21:第二空白時間 Φ 11:第一光通量 Φ 21:第二光通量 M 1 : first light emitting mode M 2 : second light emitting mode S 11 : first light signal S 21 : second light signal ƒ 11 : first frequency ƒ 21 : second frequency t 11 : first time t 21 : second light signal Two time t b11 : first blank time t b21 : second blank time Φ 11 : first luminous flux Φ 21 : second luminous flux
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