200912700 九、發明說明： 【發明所屬之技術領域】 本發明係關於一種位移偵測裝置及其省電方法，特別係關 於一種透過適應性調整光源哪率以節省消耗電能之位移偵測 裝置及其省電方法。 【先前技術】 為提升電腦設備之使用便利性，無線光學滑鼠已逐漸取代 傳統之有線滑鼠。然無線光學滑鼠一般包含有光源、數位信號 處理器（Digital Signal Processor)、影像感應器以及無線傳輸單 元等耗能元件，其整體電能消耗量大而具有電池使用壽命不足 之問題。為了解決此一問題，習知技術中有透過改變影像感應 器之影像擷取頻率的方式來降低無線光學滑鼠之消耗電能，例 如中華民國專利第1227393號之「光學位置引導裝置之省電方 法」，其揭示一種依據光學位置引導裝置之移動速度，以控制 影像感應器擷取影像之頻率，亦即透過該光學位置引導裝置之 〇水平位移數值及垂直位移數值之變化量大小，來決定擷取影像 之頻率，其中當移動速度愈快，擷取影像之頻率則愈高，同時 影像感測器之曝光時間則愈短；反之，當移動速度愈慢，擷取 影像之頻率則愈低，同時影像感測器之曝光時間則愈=，藉此 可節省該光學引導裝置之電力。 然而於實際使用上，透過改變影像感應器之影像操取頻率 及曝光時間長短以節省光學引導裝置消耗電能之方式仍具有 下列問題：（1)由於影像感應器之曝光時間長短會隨=光學位 置引導裝置之移動速度而改變，導致其影像整體亮^合產:較 01268-TW / PixrTW-0164 5 200912700 大之變動’因而具有較差之穩定性。⑺當光學位置弓丨導裝置 之移動速度降低時，雖然可降低影像感應器之影像操取頻^， =為:要在低速下獲得與高速移動時相同之最大可㈣加速 二則:广冒加影像感應器之債測範圍，因而數位信號處理器 之L號處理負载（iGading)並不會隨著影像揭取頻率之降低而 線性地降低。例如，當光學位置引導震置之移動速度降為—半 時，即使將影像掏取頻率降低為一半，但是為了維持相同之最 大可^測加速度，數位信號處理器必需處理4倍或將近4倍的 1素貝料量’因此其信號處理負載並非同時降為一半，亦即並 無法節省-半的消耗電力。此外，由於光學滑鼠之光源所消耗 之電，幾乎為整體消耗電能之一半，習知技術中並未提及任何 利用即省光源之耗電以達到降低整體耗能之方法。 基於上述原因，本發明提出一種根據位移侦測裝置之 速度以調整光源發光_康$ t、土，A # & ^ 元頭羊之方法，位移偵測裝置之電能消耗可BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a displacement detecting device and a power saving method thereof, and more particularly to a displacement detecting device capable of saving power consumption by adaptively adjusting a light source rate and Power saving method. [Prior Art] In order to improve the convenience of use of computer equipment, wireless optical mice have gradually replaced the traditional wired mouse. Wireless optical mice generally include energy-consuming components such as a light source, a digital signal processor, an image sensor, and a wireless transmission unit. The overall power consumption is large and the battery life is insufficient. In order to solve this problem, the conventional technology reduces the power consumption of the wireless optical mouse by changing the image capturing frequency of the image sensor. For example, the power saving method of the optical position guiding device of the Republic of China Patent No. 1223733 According to the moving speed of the optical position guiding device, the frequency of capturing the image by the image sensor is controlled, that is, the magnitude of the horizontal displacement value and the vertical displacement value of the optical position guiding device are determined. Take the frequency of the image, in which the faster the moving speed, the higher the frequency of capturing the image, and the shorter the exposure time of the image sensor; on the contrary, the slower the moving speed, the lower the frequency of capturing the image. At the same time, the exposure time of the image sensor is more =, thereby saving the power of the optical guiding device. However, in actual use, by changing the image manipulation frequency of the image sensor and the length of the exposure time to save the power consumption of the optical guiding device, the following problems still exist: (1) since the exposure time of the image sensor will follow the optical position The moving speed of the guiding device changes, resulting in an overall brightening of the image: a larger change than 01268-TW / PixrTW-0164 5 200912700, thus having poor stability. (7) When the moving speed of the optical position bow guiding device is lowered, although the image capturing frequency of the image sensor can be reduced, = is: the same maximum speed can be obtained at the low speed as in the high speed moving (four) acceleration two: wide Adding the image measurement range of the image sensor, the digital processing load (iGading) of the digital signal processor does not linearly decrease as the image pickup frequency decreases. For example, when the moving speed of the optical position guiding shock is reduced to half, even if the image capturing frequency is reduced to half, in order to maintain the same maximum measurable acceleration, the digital signal processor must process 4 times or nearly 4 times. The amount of 1 scallops is therefore 'the signal processing load is not reduced to half at the same time, that is, it cannot save - half of the power consumption. In addition, since the power consumed by the light source of the optical mouse is almost one-half of the total power consumption, there is no mention in the prior art of any method of utilizing the power consumption of the light source to achieve a reduction in overall energy consumption. Based on the above reasons, the present invention provides a method for adjusting the light source illuminance according to the speed of the displacement detecting device, and the power consumption of the displacement detecting device can be adjusted by the method of illuminating the light source _ _ _ _ _, soil, A # &
藉由降低光源頻率而右力+膝彳# H 貝手而有效降低，猎以解決前述習知技術中 在之問題。 ，廿 【發明内容】 本發月t目的在提供一種位移谓測裝置及其省電方 法，其根據位移偵測裝置之位移量或位移速度來調整光源之發 光頻率’以有效降低電能消耗。 本毛月另目的在提供_種位移偵測裝置及其省電 法’其中影像擷取單元之影像掏·取頻率為固定，因而影像掏取 單元之曝糾間不須隨著位㈣測裝置之移動速度而改變，具 有較佳的穩定性。 + 01268-TW/Pix-TW-0164 200912700 、為達上述㈣，本發明s供一種位移销測纟4之省電方 法，該位移偵測裝置包含一轉以一可調整之發光頻率發光以 提供操取影像時所需之光，該省電方法包含下列步驟：榻取一 第-影似-第二影像；比對該第一影像及該第二影像以求得 -位移量；將該位移量與至少—門檻值相比較；及根據比較結 果以調整該光源之發光頻率；其中，當該位移量低於該門捏值 ^該光源以—較低之發光頻率發光以節省該位移_裝置所 消耗之電能。 上述位移傾測裝置之省電方法令，當該位移量過大而益法 正確偵測位移時，則增加該發光頻率。 上述位移谓測裝置之省電方法中，該位移偵測裝置具有_ 固疋之影像擷取頻率與該發光頻率成整數倍關係。 一旦上=移㈣m置之省電方法令’榻取該第一影像及該第 一衫像之一時間差為該光源之一個發光週期。 上述位移偵測裝置之省電方法中，該位移量可分解為 :一垂直位移量’該發光頻率包含—第-發光頻率及 頻率;^ 該第一發光頻率。當該光源以該第一發光 值時1敕=水平位移量或垂直位移量其中之一高於該門檀 ::咖光源以該第二發光頻率發光 ;=量:者均低於該門檻值時，該光源維持二;= 戈丄該光源以該第二發光頻率發光，且該水平位移量 =直位移量其中之一高於該門檻值時，該光源維持以該第里 發先頻率發光，當該水平位移量及垂直 摄值時，調整該光源以該第-發光頻率發^兩者均低於該門 01268-TW / Pix-TW-〇164 7 200912700 根據本發明之另一牲 ， 置，包含—光 、，，’ · 另提供一種位移偵測裝 先源、一光源頻率控制單元、— -記憶單元及一處理單元。該光源 :二 # · ti· 4k Έ 』11 同正之發光頻率發 光，該先源頻率控制單元調萼 取簟开於诂丄 正Μ光源之發光頻率；該影像擷 取早凡於該光源發光時擷取—第 忾單元儲在；fe· S丨 办像及—第一影像；該記 有至少一門檻值；該處理單元比對該第-影像及 求出一位移量’將該位移量與該門檻值相比By reducing the frequency of the light source, the right force + knee 彳 # H is effectively reduced, and the problem is solved by the prior art.廿 [Summary] The present invention provides a displacement pre-measuring device and a power saving method thereof, which adjust the light-emitting frequency of the light source according to the displacement amount or displacement speed of the displacement detecting device to effectively reduce the power consumption. The purpose of this month is to provide a displacement detecting device and a power saving method thereof, wherein the image capturing frequency of the image capturing unit is fixed, so that the image capturing unit does not need to follow the position (four) measuring device. The speed of movement changes and has better stability. + 01268-TW/Pix-TW-0164 200912700, in order to achieve the above (four), the present invention provides a power saving method for measuring the displacement pin 4, the displacement detecting device comprising a turn to emit light at an adjustable luminous frequency to provide The light-saving method includes the following steps: taking a first-image-like second image; comparing the first image and the second image to obtain a displacement amount; The amount is compared with at least the threshold value; and the light-emitting frequency of the light source is adjusted according to the comparison result; wherein, when the displacement amount is lower than the gate pinch value, the light source emits light at a lower light-emitting frequency to save the displacement_device The power consumed. The power saving method of the above-described displacement tilting device increases the light-emitting frequency when the displacement amount is too large and the profit is correctly detected. In the power saving method of the displacement pre-measurement device, the displacement detecting device has a _ solid image capturing frequency and an integral multiple of the illuminating frequency. Once the power-saving method of up=shifting (four) m is set, the time difference of one of the first image and the first shirt image is one illumination period of the light source. In the power saving method of the above displacement detecting device, the displacement amount can be decomposed into: a vertical displacement amount', the illumination frequency includes - the first illumination frequency and the frequency; and the first illumination frequency. When the light source has the first illuminating value, one of the horizontal displacement amount or the vertical displacement amount is higher than the gate light: the coffee light source emits light at the second light-emitting frequency; the amount: the one is lower than the threshold value When the light source is maintained at the second light-emitting frequency, and the horizontal displacement amount=the direct displacement amount is higher than the threshold value, the light source maintains the first light-emitting frequency Adjusting the light source at the first-light-emitting frequency when the horizontal displacement amount and the vertical value are both lower than the gate 01268-TW / Pix-TW-〇 164 7 200912700 according to another aspect of the present invention, Set, including - light,,, ' · Also provides a displacement detection pre-source, a light source frequency control unit, - memory unit and a processing unit. The light source: two # · ti· 4k Έ 』11 is the same luminous frequency illuminating, the pre-source frequency control unit modulates the illuminating frequency of the 诂丄 Μ Μ source; the image captures when the light source is illuminated The first unit is stored in the ;fe·S丨 image and the first image; the record has at least one threshold value; the processing unit compares the displacement amount with the first image and the distance Compared to the threshold
發光糖：較結果控制該光源頻率控制單元調整該光源之 # 其中當該位移量低於該門檀值時，該光源以-較 -之發先頻率發光，藉以節省該位移谓測裝置所消耗之電能6 本發明之位移债測裝置及其省電方法中，可具有兩個以上 2板值，藉此該光源發光頻率之調整可分為數個階段，可同 日守達成’電以及維持位移偵測效能之目的。此外，該位移摘測 、置另包3冑輸介面單元將所債測之位移量傳送至一影像 』不裝置，例如電視螢幕、電腦螢幕、遊戲機螢幕或投影幕上， 以進行游標或-指向器晦準點之控制。該位移偵測裝置之實施 例包含一無線光學滑鼠及-導航裝置(navigate device)。 【實施方式】 為了讓本發明之上述和其他目的、特徵及優點能更明顯， 下文特舉本發明實施例，並配合所附圖示，作詳細說明如下。 印參照第la、lb及2圖所示，其分別揭示本發明實施例之 位移偵测裝置1 〇之立體示意圖及方塊示意圖。該位移偵測裝 置1〇例如可為無線光學滑鼠或無線光學導航裝置（wireless navigation device)，其通常置放於一表面s(例如滑鼠墊之表面 〇 1268-TW / Pix-TW-0164 8 200912700 ==用者操控，可用以相對控制一影像顯示裝置％上 包向指標）91之移動，該影像顯示裳置9〇之實施例 戲機螢i 一電視螢幕、—投影幕、—電腦螢幕及一遊 戲機螢幕。該位移谓測裝置1〇包含一光源、 =單元一記憶單元，一影像擷取單元二= I):，5、-傳輸介面單…至少-透鏡(或透鏡 實施例之位移偵測裝置1G之說明中，雖_4 線先學滑鼠作為例示性的說明，如第la圖所示，㈣用 ^制本發明。該位移偵測袭置1G(無線光學滑氣卜般具有一 成100，其底部具有一孔Η且該位移偵測裳置1〇 構 件係設置於該殼體100内。該光源1〇1係以 = 作為提供該影像擷取單…取二= 源、、實施例包含發光二極體及雷射二極 透過該殼體_之孔Η照明該表面S，自該表面：；：：光1 :度經過该孔Η後由該影像擷取單元1〇4僧 I控制單^02_以調整該光源⑻之發光頻率。革 103中儲存有至少—門辦 -。己U早凡 1〇 1檻值(thresh〇1“alue)。該影像擷取單元 可隸t /之影像#1取頻·率伽㈣如0，該影_取頻率 、擇一亥先源101之發光頻率成一整數倍 ，元1〇4可同步於該光請之發光頻率，以上It ，面S之先影像，於其他實施方式中該影㈣取頻率亦〆 Μ先源ΠΠ之發光頻率成_整數倍關係、。該處 係用以比對該影像擷取單元104所擷取之複數：105 該位移谓測裝置1G之位移量或位移速度，並將該料量^ .01268-TW/Pix-TW-0164 200912700 移速度與儲存於該記憶單元103之門植值相比較，根據比較社 ，控制該光源頻率控制單元102調整該光源ι〇ι之發光頻率。 错企士匕，當該位移偵測裝置10之位移量或位移速度低於該門植 值時’該光源101可以一較低之發光頻率發光，以節省該位移 偵測裝置U)所消耗之電能。最後，該位移偵測裝置1〇之位移 2或：ΐ速度經由一傳輸介面單元106無線地傳送至該影像 精進仃相對之㈤空°料，—透鏡（或透鏡 ⑽可選擇性地設置於該㈣1G1之前方以㈣其照㈣ 圍’另可選擇將-透鏡（或透鏡組）1G7設置於該影㈣ 104之前方以提高其感光效率。 二 =3圖所示，其例示性地揭示本發明之-種實施例 ::像掏取單元104之影像擷取頻率FR以及該光源⑻ :=頻率EF1'EF2及EF3之時序圖其中，㈣，罐 ::/=¥3，_次/秒(赫兹 ΕΓ开該影像掏取頻率FR與該發光頻率阳、阳及 該光源101提，擷取所需之光。藉此，雖然 作由於；早7104以一固定之影像擷取頻率FR擷取影像， 光源101受到該光源頻率控制單一之控制，立並 ==像擷取_ Μ提供絲影像因:該 實際所擁取之影像係受到™之發光 擷取之有效景/像進理早70105基於該影像擁取單元104實際所 是，第3S二“移里或位移速度之計算。可以了解的 率奸βΛ ρ影像擁取頻率FR、光源⑻之發光頻 1 3以及發光頻率之數目僅為本發明之-種實 〇1268-TW/Pix-TW_0164 10 200912700 施例，並非用以㈣本發明，該影像操取頻率fr、發光頻率 EF丨、EF2及EF3以及發弁瓶玄 元頻率之數目皆因實際需求而可任意 設定。 請參照第3及4圖所示，接著說明該光源101於不同發光 頻率下，該處理單元105所能销測之最大移動量以做為設定門 檻值之參考。該影像擷取單元1()4以該光源1G1之—個發光週 期為間隔分別擷取一第-影像20及-第二影像30,於該第一 影像2 0選定一參考擅尊柄^ j 、， 琛稷寻框21 ’亚於該第二影像3〇選定一搜 尋框3 1。該處理單元1 0 5目丨丨# @ °十异該參考搜尋框21以及該搜尋 框3 1之間的位移量以作真句 & ^ 乍為該位移偵測裝置10之位移量或位移 速度。為簡化說明，於第4圖中僅考慮X軸方向（圖中水平方 向）之位移，於實際操作時該位移量係包含x轴方向以及Y轴 M 大可㈣位移係發生於該參考搜尋框21位於 田 豕 敢左側以及該搜尋框31位於該第二影像3〇 致右側之情形。例如當絡伞相、套& ”如田發先頻率為EF1=3，_赫茲，每張圖框 具有16x16個晝素，該搜尋框31及該參考搜尋框21呈有8x8 個畫素’且畫素中心到畫素中·心的距離為30微米之條件下， Μ大可㈣㈣量為8個晝素位移量，則每秒最大可僅測位 :量（即位移速度)…〇〇〇(張/秒)χ8(畫素/張)χ3〇(微 幻=720(微米/秒），其近似☆ 28英忖冰；同理可求得 率㈣為阳心。◦赫兹以及叫=1，刚赫兹且其他條件相同貝 時之母秒最大可偵測位移量（即位移速度），分別近似於1 叶/秒旦及9英物。由此可知，當該位移偵測裝置1〇之每秒 :移里超過9央吋時’該光源1〇1至少需以阳之發光頻 光，如此該處理單元1 05十於約伯、 平凡才此夠偵測到位移量；當該位移偵測 〇1268-TW/Pix-TW-0164 11 200912700 裝置ίο之每秒位移量超過14英吋時，該光源ι〇ι之發 則至少…f3。換句話說，當位咖裝置1〇之：移量 過光源10 1當時之發光艇盘丁+ m 1 d、 沒 oa _ 、 、 琅大可偵測位移量時，該處理 早兀05則無法計算此時之位移量因而必須增加光源1〇1 之發光頻率以使該位㈣測裝置1()正常運作。可以 是’本說明中所揭示之所有數值μ 71令数值6又疋僅為本發明之一種實施方 非用以限定本發明，該等數值可隨實際產品設計而任音 決定。 I 7丨丈思 Ο 明參第5圖所示，其揭示本發明實施例之位移偵測裝置 1〇之省電方法之流程圖’包含下列步驟：擷取-第-影像(步 驟401);擷取一第二影像（步 403)； 1 疋否了求件一位移罝（步驟4〇4);若 否，則增加發光頻率（步驟4〇5);若是，則將該位移量盘至少 一門植值相比較（步驟偏）；以及㈣發光頻率（步驟術广藉 此，當該位移量低於該門檻值時，該光源ι〇ι以一較低之發光 頻率FR發光，以節省位移偵測裝置】〇所消耗之電能。 、則/詈參it第2至α圖所示’接著說明本發明實施例之位移偵 省電方法，該光源最初係以發光頻率EFl(例 如I’ooo赫餘)發光。首先，該影像擷取單元…擷取一第一 :像20’其可為該位移偵測裝置1〇尚未移動前所擷取之影 象’亦可為移動中所擷取之影像（步驟術）。該影像棟取單元 二於：取完該第一影像20後經過該光源ι〇ι之一發光週期 (此％為"胸秒）時擷取該第二影像3〇(步驟4叫如第3圖 所不’於此發光週期内該影像掏取單元1〇4實際已另外擷取完 2張影像，但由於操取該第-影像20及該第二影像30之期間 〇 1268-TW / Pix-T W-0164 12 200912700 内該光源1〇1並未發光，因此該影像擷取單元1〇4所擷取之影 像亚非有效影像。接著，該處理單元105比對該第_影像 之參考搜尋框21以及該第二影像3〇之搜尋框31(步驟、巧， =判斷是否可求得一位移量（步驟4()4)。當判斷無法求得位移 量時’表示該光源1(H之發光頻率EFi太低，因此該處理單元 控制該光源頻率控制單元1〇2提升該光源ι〇ι之發光頻率 為EF2(例如moo赫兹）或阳（例如3，_赫兹）（步驟4 。 當判斷可求得位移量時，該處理單元1()5將該位移量與儲存於 ^己憶單元103中之至少一門播值相比較（步驟彻），例如第 6a圖所示，#中一第一門檻值設定為9英吋 設定為14英吋。 一]檻值 必須解的是，雖然帛6a圖中之橫轴係以位移量表示，當 該位移量為每秒位移量時，則與位移速度具有相同物理音義。 於此^施例中，當該處理單元.1Q5m該位移㈣裝置^之 位移讀過9 Η時，則控制該光源頻率控制單元1G2調整該 光=m之發光頻率為EF2;當判定該位移偵測裝f 之^ 移里超過14央忖日夺’則控制該光源頻率控制單it 102調整該 ^ 1之么光頻率為Εί?3 ;當該位移量未超過9英吋，則不 七王/舍光頻率Ef](步驟4〇7)。接著，該影像搁取單元 ，過另-發光週期（可能經過調整或未經過調整，調整後例如 :為1:1500《1/3〇〇〇秒)後擷取一新的影像，並使原第二影 旦30成為新的第―影像2()，並使新擷取之影像成為新的第二 影像Μ ’接著從步驟彻重新開始動作，以狀應該調升或 調降及f源1G1之發光頻率。如此，當該處理單元1G5所求得 之位移量低於設定之門檻值時，藉由降低該光源101之發光頻 〇1268-TW/PiX-TW-〇164 13 200912700 率，以有效降低該位移偵測裝置1〇之消耗電能。Glowing sugar: controlling the light source frequency control unit to adjust the light source of the light source. When the displacement amount is lower than the threshold value, the light source emits light at a frequency of -first, thereby saving the displacement of the measuring device. The electric energy 6 of the present invention can have two or more plate values in the displacement debt measuring device and the power saving method thereof, whereby the adjustment of the luminous frequency of the light source can be divided into several stages, and the electric and the displacement detection can be achieved with the same day. The purpose of measuring performance. In addition, the displacement picking and setting of the 3D interface unit transmits the offset of the debt measurement to an image, such as a television screen, a computer screen, a game machine screen or a projection screen, for cursor or The pointer is controlled on time. An embodiment of the displacement detecting device includes a wireless optical mouse and a navigation device. The above and other objects, features, and advantages of the present invention will become more apparent from the embodiments of the invention. Referring to Figures la, 1 and 2, respectively, a perspective view and a block diagram of a displacement detecting device 1 according to an embodiment of the present invention are disclosed. The displacement detecting device 1 can be, for example, a wireless optical mouse or a wireless navigation device, which is usually placed on a surface s (for example, the surface of a mouse pad 〇 1268-TW / Pix-TW-0164 8 200912700 == User control, can be used to relatively control the movement of an image display device on the index to the indicator 91, the image shows the embodiment of the movie theater, a TV screen, a projection screen, a computer Screen and a game console screen. The displacement pre-measurement device 1 includes a light source, a unit-memory unit, an image capturing unit 2 = I):, 5, a transmission interface, a single lens, at least a lens (or a displacement detecting device 1G of the lens embodiment) In the description, although the _4 line learns the mouse as an illustrative description, as shown in the first figure, (4) the invention is made by using the method. The displacement detection hits 1G (the wireless optical slippery air has a scale of 100, The bottom portion has a hole Η and the displacement detecting and sliding member is disposed in the housing 100. The light source 〇1 is provided with the image capture unit as the second source, and the embodiment includes The light-emitting diode and the laser diode illuminate the surface S through the aperture of the housing _, from the surface:;:: light 1: the degree passes through the aperture and is controlled by the image capturing unit 1〇4僧I Single ^02_ to adjust the light source frequency of the light source (8). The leather 103 stores at least - the door handle - has a value of 1〇1槛 (thresh〇1 "alue". The image capture unit can be t / Image #1 frequency-receiving rate gamma (four) such as 0, the shadow _ take frequency, select a ray source 101 light-emitting frequency into an integer multiple, the element 1 〇 4 can be synchronized with the light please shine The frequency, the above It, the first image of the surface S, in other embodiments, the image (4) takes the frequency and the light source frequency of the source 成 is an integer multiple relationship, which is used to compare the image capturing unit 104. The number of displacements: 105 is the displacement or displacement speed of the displacement device 1G, and the mass of the material is .01268-TW/Pix-TW-0164 200912700 and the threshold value stored in the memory unit 103 In comparison, according to the comparison agency, the light source frequency control unit 102 is controlled to adjust the light-emitting frequency of the light source ι〇ι. When the displacement or displacement speed of the displacement detecting device 10 is lower than the threshold value, The light source 101 can emit light at a lower illumination frequency to save power consumed by the displacement detecting device U). Finally, the displacement detecting device 1 has a displacement 2 or a speed of wirelessly via a transmission interface unit 106. The image is transferred to the image (5), and the lens (or the lens (10) can be selectively disposed before the (4) 1G1. (4) The shadow (four) 104 in front of to improve their sense Efficiency is shown in Fig. 2, which exemplarily discloses an embodiment of the present invention: an image capturing frequency FR like the capturing unit 104 and a timing chart of the light source (8): = frequencies EF1' EF2 and EF3. (4), can:: /= ¥3, _ times / sec (Hertz opened the image capture frequency FR and the light-emitting frequency Yang, Yang and the light source 101 to extract the desired light. Because the image is captured by a fixed image capturing frequency FR 7104, the light source 101 is controlled by the single frequency control of the light source, and the vertical image is replaced by the image of the source image. The effective scene/image processing by the illuminating of the TM 70105 is based on the calculation of the image capturing unit 104, the third S2 "shifting or displacement speed". The number of spectroscopy β Λ ρ image acquisition frequency FR, the light source frequency of the light source (8), and the number of illuminating frequencies are only the ones of the present invention. 1268-TW/Pix-TW_0164 10 200912700, not for (4) According to the present invention, the number of the image manipulation frequency fr, the illumination frequencies EF丨, EF2 and EF3, and the frequency of the hairpin cylinder can be arbitrarily set according to actual needs. Referring to Figures 3 and 4, the maximum amount of movement that the processing unit 105 can measure at different illumination frequencies is used as a reference for setting the threshold. The image capturing unit 1 () 4 captures a first image 20 and a second image 30 at intervals of the light emitting period of the light source 1G1, and selects a reference qualifier in the first image 20 The search box 21' selects a search box 3 1 from the second image 3 . The processing unit 1 0 5 丨丨 @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ speed. In order to simplify the description, only the displacement in the X-axis direction (horizontal direction in the figure) is considered in FIG. 4, and the displacement amount includes the x-axis direction and the Y-axis M in the actual operation. (4) The displacement system occurs in the reference search box. 21 is located on the left side of Tian Hao and the search box 31 is located on the right side of the second image 3 . For example, when the umbrella phase, the sleeve & the field frequency is EF1=3, _ Hertz, each frame has 16x16 pixels, the search box 31 and the reference search box 21 have 8x8 pixels' and draw Under the condition that the distance from the center of the element to the center of the pixel is 30 micrometers, the amount of the four (4) (four) is 8 displacements of the element, and the maximum position per second can be measured only: the quantity (ie the displacement speed)... / sec) χ 8 (pixel / Zhang) χ 3 〇 (micro-magic = 720 (micron / sec), which is similar to ☆ 28 inches of ice; the same reason can be obtained (four) for the heart. ◦ Hertz and called = 1, just The maximum detectable displacement (ie, the displacement velocity) of Hertz and other conditions with the same condition is approximately 1 leaf/second denier and 9 inches respectively. It can be seen that when the displacement detecting device 1 : When the movement exceeds 9 吋, the light source 1〇1 needs at least the illuminating frequency of the yang, so that the processing unit is 10 于 约 约 约 约 约 约 约 约 约 约 约 约 约 约 约 约 约 约 约 约 约 约 约 约 约 约 约 约 约1268-TW/Pix-TW-0164 11 200912700 When the displacement of the device ίο exceeds 14 inches per second, the light source ι〇ι is at least...f3. In other words, when the coffee device is 1〇 : Shifting over the light source 10 1 At that time, the luminous boat Ding + m 1 d, no oa _, , 琅 can detect the displacement, the processing can not calculate the displacement at this time, so the light source must be increased. The illuminating frequency of 〇1 is such that the bit (4) measuring device 1() operates normally. It can be 'all the values disclosed in the description μ 71. The value 6 is only an embodiment of the present invention and is not intended to limit the present invention. The values can be determined according to the actual product design. I 7 丨 Ο Ο Ο 第 第 第 第 第 第 第 第 第 第 第 第 第 第 位移 位移 位移 位移 位移 位移 位移 位移 位移 位移 位移The following steps: capturing - the first image (step 401); capturing a second image (step 403); 1 求 no request one displacement 罝 (step 4 〇 4); if not, increasing the illuminating frequency (step 4〇5); if yes, compare the displacement dial to at least one plant value (step bias); and (4) the light-emitting frequency (the step is wide, whereby when the displacement is lower than the threshold, the light source ι〇 ι emits light at a lower luminous frequency FR to save the energy consumed by the displacement detecting device Then, the 詈 it it is shown in the second to the alpha diagrams. Next, the displacement detection power saving method according to the embodiment of the present invention will be described. The light source is initially illuminated by the illuminating frequency EF1 (for example, I'ooo). First, the image 撷Take the unit...take a first: like 20', which can be the image captured by the displacement detecting device 1 before it has moved. It can also be the image captured during the movement (step). Taking the unit 2: after the first image 20 is taken, the second image is captured by one of the light sources ι〇ι (this % is " chest seconds) (step 4 is called as shown in Fig. 3) The image capturing unit 1〇4 has actually captured two additional images during the lighting period, but the period of the first image 20 and the second image 30 is 〇1268-TW / Pix-T In the W-0164 12 200912700, the light source 1〇1 does not emit light, so the image capturing unit 1〇4 captures the image sub-active image. Then, the processing unit 105 compares the reference search frame 21 of the first image with the search frame 31 of the second image 3 (step, Q, = whether it is possible to determine a displacement amount (step 4 () 4). When it is judged that the displacement amount cannot be obtained, 'the light source 1 is indicated (the light emission frequency EFi of H is too low, so the processing unit controls the light source frequency control unit 1〇2 to raise the light source frequency of the light source ι〇ι to EF2 (for example, moo Hertz) Or yang (for example, 3, _ Hertz) (Step 4) When it is judged that the displacement amount can be determined, the processing unit 1() 5 compares the displacement amount with at least one homing value stored in the memory unit 103. (Step is complete), for example, as shown in Fig. 6a, #一一第一 threshold is set to 9 inches and is set to 14 inches. A] 槛 value must be solved, although the horizontal axis of 帛6a is displaced The quantity indicates that when the displacement amount is the displacement per second, it has the same physical meaning as the displacement speed. In this embodiment, when the displacement of the processing unit .1Q5m is shifted by 9 Η, Controlling the light source frequency control unit 1G2 to adjust the light emission frequency of the light=m to EF2; when determining the displacement If the displacement is less than 9 inches, then the frequency is not more than 9 inches. Wang/she light frequency Ef] (step 4〇7). Then, the image shelving unit passes the other-lighting period (may be adjusted or not adjusted, for example: 1:1500 "1/3〇〇" After a leap second, a new image is captured, and the original second shadow 30 becomes the new image 2 (), and the newly captured image becomes the new second image Μ 'and then restarts from the step The action should be adjusted or lowered and the illumination frequency of the source 1G1. Thus, when the displacement amount obtained by the processing unit 1G5 is lower than the set threshold, the illumination frequency of the light source 101 is lowered by 1268. -TW/PiX-TW-〇164 13 200912700 rate to effectively reduce the power consumption of the displacement detecting device.
C 請參照第6b圖所示，其揭示本發明實施例中該處理單元 ⑻比較該位㈣測裝置1〇之位移量與門檻值之另一種實施 方式。於此實施例中，位移量係被分解為水平位移量Μ以及 垂直位移量ΔΥ。當該光源1〇1之發光頻率為阳(例如ι〇〇〇 赫兹），且該處理單元105判定水平位移或垂直位移量 △ Υ其中之-大於-第-門檻值（例如9英对）時，該處理單元 105則控制該光源頻率控制單A 1G2增加該光源、⑻之發光頻 率為叫例如U500赫旬，當判定該水平位移量Δχ及垂直 位移篁Α γ兩者均小於兮笛 ♦ 該弟門榼值，該發光頻率維持為 阳。當該光源101之發光頻率為EF2，且該處理單元⑻判 定水平位移量ΔΧ或垂直位移量ΔΥ其中之一大於一第三門 檻^朴14英忖）時，該處理單元1G5㈣制該光源料控 :早το 102增加該光源、1〇1之發光頻率為ef“例如⑻赫 兹）’當判定水平位移量ΔΧ及垂直位移量Λγ兩者均小於咳 第-門檻值時，該處理單元105則控制該光源頻率控制單元 1〇2減少該光源1〇1之發光頻率為叫，否則該發光頻率維持 為EF2。當該光源101之發光頻率為EF3，且該處理單元⑻ 判定水平㈣量ΔΧ及垂直位移量Δγ S者均小於該第三門 檻值時，該處理單元105則控制該光源頻率控制單元102減少 該光源1〇1之發光頻率為EF2,甚至有可能調整為EFi，當該 水平位移量ΔΧ或垂直位移量其中之一仍大於該第三門 播值時’該發光頻率維持為EF3。亦即，於此實施例中，該處 理早元105係分別將該門檻值與該位移偵測裝置⑺位移量之 水平及垂直分量相比較。 01268-TW / Pix-TW-0164 14 200912700 今杳參-日S 楚 η 、⑥… 圖，其揭示本發明實施例之位移偵測裝置1〇 省私方法之另一種實施方式，其與前述實施例最主要之差異 在於增加及降低該光源101發光頻率之門檻值並不相同。例 如第7圖所示，增加發光頻率之門根值分別設定為第二門檀值 (例如9央时）及第四門檻值（例如14英时），降低發光頻率之門 檻值二別破叹定為第一門檻值(例如8英吋)及第三門檻值(例 如13央叶）’且該第二門檀值大於該第-門檻值，該第四門檻 值大於該第三門檻值。#該光源⑻之發光頻率為叫例如 赫兹）’且該處理單元1()5収該位移偵測裝置1〇之位 移量大於該第二門檻值時，光源1〇1之發光頻率被調整為 EF2(例如以⑻赫茲），當位移量小於該第二門檻值時，該發 光頻率維持為EF,。當該光源.1G1之發光頻率為EF2，且該處 理單元105判定該位移镇測裝f 1〇之位移量大於該第四門檻 =時，該光源101之發光頻率被調整為EFK例如3,〇〇〇赫茲）， t判Μ移量小於該第―⑽值時’該光源⑻之發光頻率被 調整為EF!，當所判定之位移量介於該第—與第四門播值之間 時，該發光頻率維持為EIV當該光源1〇1之發光頻率為Eh， 且該處理單元1〇5判定該位移偵測裝置1〇之位移量小於該第 三門檻值時，該光源1〇1之發光頻率被調整為，當位移量 仍然大於該第三門檻值時，該發光頻率則維持為Eh。由於此 實施例中係使得降低發光頻率之門檻值（第—及第三門檻值） 低於增加發光頻率之門檻值（第二及第四門檻值），可提升I位 移偵測裝置10之操作效能。 / 請參照第8圖所示，該處理單元1〇5同樣可將該位移量分 解為水平位移量△X以及垂直位移量△ γ後，並分別與該第 01268-TW / Pix-TW-0164 15 200912700 一、第二、第三及第四門播值相比較，並根據比較結果控制該 光源頻率控制單元102調整該光源⑼之發光頻率。例如Λ 該光源101之發光頻率為阳（例如赫兹），且該處理; 兀105判定該位移偵測裝置1〇 干 θ 之水千位移量ΔΧ或垂直位移 里其中之-大於該第二門檀值時，該光源ι〇ι之 被調整為EF2(例如U500赫兹)，當水平位移量Δχ及垂直 移量ΔΥ兩者均小於該第二門插值時，該發光頻率维持為 EFl。當該光源1〇1之發光頻 、、為 f i々 2且落竭·理早7L 105判 :遠位移制裝410之水平位移量Δχ或垂直位移量Δγ盆 中之一大於該第四門檻值時，嗜# 八 , 叶这先源101之發光頻率被調整為 EF3(例如3,〇〇〇赫茲），當水平· 木认， &十位移里ΔΧ及垂直位移量ΔΥ兩 者均小於該第一門檻值時，嗲氺 °x7b/原101之發光頻率被調整為 Eh，否則該發光頻率維持為 為叫，Μ處理單S1G5衫^/；^⑻之發光頻率 移量Μ及垂直位移量移伯測裝置1〇之水平位 =之發光頻率被調整為叫，甚至有可能調 ^ ί平位移量^义或垂直位 巧1田水 檻值時，該發光頻率則维持為Ε/' ㈣大於該第三門 1〇之物铱+㈣持為叫。猎此，當該位移偵測裝置 i發::丰 =設定之_時，該光…以-較低 之省t 1其揭示本發明實施例之位移福測裝置w ⑻發光頻率之⑽值Λ 使增加及降低該光源 增加發光頻率時之心…/ 9 ^與第7圖之差別在於，該 降低發Aina# > "(第一及第四門檻值）係設定為低於 降低發先頻率時之門楹值（第一及第三門捏值）。當該光源ι〇ι 01268-TW / PixrTW-0164 16 、 200912700 之發光頻率為EFl(例如ι刪赫幻，且該處理單元m 該位移偵測裝置10之位移量大於該第二門檻值(例如8英： 夺，源101之發光頻率被調整為EF2(例如赫兹），當 位移夏小於該第二門檻值時，該發光頻率維持為EFi。當該光 :二之發光頻率為EF2’且該處理單元1〇5判定該位移偵測 1之二位移量大於該第四門檻值(例如U英吁)時，該光源 之發光頻率被調整為EF3(例如3,〇〇〇赫兹）’當位 Γ 於該第插值（例如9英…時，該發光頻率則被調整為 阳，當位移量介於該第一與第四門檻值之間時，該發光頻率 維持為叫。當該光源101之發光頻率為叫，且該處理單元 1〇5判定該位㈣測裝置1G之位移量小於該第三門插峨如 14英忖）時’該光源101之發光頻率被調整為阳，當位移量 仍然大於該第三門檻值’該發光頻率則維持為阳。由於此實 施例中係使得增加發光頻率之門播值低於降低發光頻率之門 檻值，可有效降低該位移偵測裝置1〇之消耗電能。 此外，如第8圖所示，續#禅苗-,Λ， 口 W不4處理早70 105同樣可將該位移量 分解為水平位移量ΛΧ以及垂直位移量ΔΥ後，分別與該第 一、第二、第三及第四門植值相比較，並根據比較結果控制該 光源頻率控制單元102調整該光源1〇1之發光頻率。除了門禮 值之设定不同外，其他實施步驟皆與第8圖所示之步驟相似， 於此不再贅述。藉此’當該位移偵測敦置1〇之位移量低於所 設定之至少-門植值時’該光源1〇1可以一較低之發光頻率發 光，以節省該位移偵測裝置1〇所消耗之電能。 …上所⑱纟於驾知技術透過改變影像感應器之掏取影像 頻率及曝光時間長短之方式來節省電能’具有穩定性以及耗能 01268-TW / Pix-TW-0164 .17 200912700 節省效能不佳之問題。相較於習知技術’本發明之位移偵測裝 置及其省電方法（如第5圖所示）係藉由绸整光源之發光頻率以 有效玲省位移偵測裝置所消耗之電能，由於影像擷取單元之 曝光時間為固定，可解決穩定性不佳之問題。 雖然本發明已以前述較佳實施例揭禾’然其並非用以限定 本發明’任何本發明所屬技術領域中具有通常知識者，在不脫 離本發明之精神和範圍内，當可作各種之更動與修改。因此本 發明之保護範圍當視後附之申.請專利範圍所界定者為準。 〇 01268-TW7 Pix-TW-0164 18 200912700 【圖式簡單說明】 第la圖.本發明實施例之位移偵測裝置之立體示意圖。 第lb圖.本發明實施例之位移偵測裝置及相對應之影像 顯示裝置之立體示意圖。 第2圖： 第3圖： ζ'Λ 第4圖： 本發明實施例之位移偵測裝置之方塊示意圖。 本發明實施例之位移偵測裝置中，影像擷取單元 之衫像擷取頻率及光源之發光頻率之時序圖。 本發明實施例之位移偵測裝置之處理單元計算位 移债測裝置位移量之示意圖。 第5圖：本發明實施例之位移债測裝置之省電方法之流程 圖。 第“圖：本發明實施例之位移偵測裝置之省電方法中， 依據位移量及至少一門播值適應性調整發光頻率 之示意圖。 第6b圖 :本發明實施例之位移偵測襄置之省電方法中， “康水平位移量、垂直位移量及至少一門檻值適 應性調整發光頻率之示意圖。 第7圖： 本發明實施例之位移價測跋置之省電方法中，依 據位移里及至少—門禮值適應性調整發光頻率之 不忍圖’其中增加發光頻率之門檻值高於降低發 光頻率之門檻值。 第8圖：本發明實施例之位移偵測裝置之省電方法令，依 據水平位移里、垂直位移量及至少一門插值適應 01268-TW / Pix-TW-0164 19 200912700 第9圖：本發明實施例之位移偵測裝置之省電方法中，依 據位移量及至少-門榧值適應性調整發光頻率之 另一不意圖，其中增加發光頻率之門播值低於降 低發光頻率之門檻值。 【主要元件符號說明】 10 位移偵測裝置 100 殼體 101 光源 102 光源頻率控制單元 103 記憶單元 104 衫像操取單元 105 處理單元 106 傳輸介面單元 107 透鏡 20 第一影像 21 參考搜尋框 30 第二影像 31 搜尋框 401- ~407步驟 90 衫像顯不裝晋 91 游標 Η 孔 S 表面 ΔΧ 水平位移量 ΔΥ 垂直位移量 FR 影像擷取頻率 EF, 、EF〗、EF3發光頻率 A 影像擷取時間 01268-TW / Pix-TW-0164C. Referring to Fig. 6b, it is disclosed that the processing unit (8) compares the displacement amount and the threshold value of the bit (four) measuring device 1 in the embodiment of the present invention. In this embodiment, the displacement amount is decomposed into a horizontal displacement amount Μ and a vertical displacement amount ΔΥ. When the light-emitting frequency of the light source 101 is positive (for example, ι Hz), and the processing unit 105 determines that the horizontal displacement or the vertical displacement Δ Υ is greater than - the -th threshold (for example, 9 inches) The processing unit 105 controls the light source frequency control unit A 1G2 to increase the light source, and the light-emitting frequency of (8) is, for example, U500 Hz, when it is determined that the horizontal displacement Δχ and the vertical displacement 篁Α γ are both smaller than the 兮 ♦ The threshold of the brother, the luminous frequency is maintained at yang. When the light-emitting frequency of the light source 101 is EF2, and the processing unit (8) determines that one of the horizontal displacement amount ΔΧ or the vertical displacement amount ΔΥ is greater than a third threshold (14 inches), the processing unit 1G5(4) manufactures the light source control unit. : το 102 increases the light source, and the illuminating frequency of 〇1 is ef "for example, (8) Hertz). When it is determined that both the horizontal displacement amount ΔΧ and the vertical displacement amount Λγ are smaller than the cough-threshold value, the processing unit 105 controls The light source frequency control unit 〇2 reduces the light-emitting frequency of the light source 〇1 to be called, otherwise the light-emitting frequency is maintained as EF2. When the light-emitting frequency of the light source 101 is EF3, and the processing unit (8) determines the horizontal (four) amount ΔΧ and vertical When the displacement amount Δγ S is less than the third threshold value, the processing unit 105 controls the light source frequency control unit 102 to reduce the light emission frequency of the light source 1〇1 to EF2, and may even adjust to EFi, when the horizontal displacement amount When the ΔΧ or the vertical displacement is still greater than the third homing value, the illuminating frequency is maintained as EF3. That is, in this embodiment, the processing is performed by the threshold 105 and the displacement detection respectively. Loading The horizontal and vertical components of the displacement amount of (7) are compared. 01268-TW / Pix-TW-0164 14 200912700 The present invention discloses a displacement detecting device according to an embodiment of the present invention. Another embodiment of the private method differs from the previous embodiment in that the threshold value for increasing and decreasing the light-emitting frequency of the light source 101 is not the same. For example, as shown in FIG. 7, the gate root value of increasing the light-emitting frequency is set to The second threshold (for example, 9 sec.) and the fourth threshold (for example, 14 mph), the threshold for lowering the luminous frequency is determined as the first threshold (for example, 8 inches) and the third threshold. (eg, 13 central leaves) 'and the second threshold value is greater than the first threshold value, the fourth threshold value is greater than the third threshold value. # The light source (8) has a luminous frequency of, for example, Hertz) and the processing unit When the displacement amount of the displacement detecting device 1 is greater than the second threshold value, the light-emitting frequency of the light source 1〇1 is adjusted to EF2 (for example, (8) Hertz), and when the displacement amount is less than the second threshold value When the luminous frequency is maintained at EF, when the light source of the light source .1G1 When it is EF2, and the processing unit 105 determines that the displacement amount of the displacement measuring device f1〇 is greater than the fourth threshold=, the light-emitting frequency of the light source 101 is adjusted to EFK, for example, 3, 〇〇〇 Hz, t When the shift amount is less than the first (10) value, the light-emitting frequency of the light source (8) is adjusted to EF!, and when the determined displacement amount is between the first and fourth gated values, the light-emitting frequency is maintained as EIV. The light-emitting frequency of the light source 1〇1 is Eh, and the processing unit 1〇5 determines that the displacement amount of the displacement detecting device 1〇 is less than the third threshold value, the light-emitting frequency of the light source 1〇1 is adjusted to be When the displacement is still greater than the third threshold, the illumination frequency is maintained at Eh. Since the threshold value (the first and third threshold values) for lowering the light-emitting frequency is lower than the threshold value (the second and fourth threshold values) for increasing the light-emitting frequency in this embodiment, the operation of the I-displacement detecting device 10 can be improved. efficacy. / Please refer to Fig. 8, the processing unit 1〇5 can also decompose the displacement amount into a horizontal displacement amount ΔX and a vertical displacement amount Δγ, and respectively with the 01268-TW / Pix-TW-0164 15 200912700 The first, second, third and fourth gate values are compared, and the light source frequency control unit 102 is controlled to adjust the light-emitting frequency of the light source (9) according to the comparison result. For example, the light source 101 has a light emitting frequency of yang (for example, Hertz), and the process ;105 determines that the displacement detecting device 1 has a water displacement amount ΔΧ or a vertical displacement of the θ of the θ. At the time of the value, the light source ι〇ι is adjusted to EF2 (for example, U500 Hz), and when both the horizontal displacement amount Δχ and the vertical shift amount ΔΥ are smaller than the second gate interpolation, the light emission frequency is maintained at EF1. When the illuminating frequency of the light source 〇1 is fi々2 and is exhausted, the early 7L 105 is judged: one of the horizontal displacement amount Δχ or the vertical displacement amount Δγ basin of the remote displacement assembly 410 is larger than the fourth threshold value. At the same time, the illuminating frequency of the source 101 is adjusted to EF3 (for example, 3, 〇〇〇 Hertz), and when horizontal, wood, & ten displacement, ΔΧ and vertical displacement ΔΥ are both smaller than When the first threshold is used, the illuminating frequency of 嗲氺°x7b/original 101 is adjusted to Eh, otherwise the illuminating frequency is maintained as Μ, and the illuminating frequency shift Μ and vertical displacement of the single S1G5 shirt ^/;^(8) are processed. The horizontal frequency of the shifting device 1 is adjusted to be called, and even when it is possible to adjust the displacement amount or the vertical position, the luminous frequency is maintained as Ε/' (4) The object 铱+(4) larger than the third door is held as a call. Hunting this, when the displacement detecting device sends a: _============================================================================================ The difference between the increase and decrease of the light source to increase the light-emitting frequency.../ 9 ^ differs from the seventh figure in that the decrease Aina# >" (first and fourth threshold values) is set to be lower than the lower limit. Threshold value at frequency (first and third gate values). When the light source of the light source ι〇ι 01268-TW / PixrTW-0164 16 , 200912700 is EF1 (for example, the displacement amount of the displacement detecting device 10 is greater than the second threshold value (for example, 8 inches: the illuminating frequency of the source 101 is adjusted to EF2 (for example, Hertz), and when the displacement summer is less than the second threshold, the illuminating frequency is maintained as EFi. When the illuminating frequency of the illuminating frequency is EF2' and the When the processing unit 1〇5 determines that the displacement detection 1 bis displacement amount is greater than the fourth threshold value (for example, U Ying Yu), the light source frequency of the light source is adjusted to EF3 (eg, 3, 〇〇〇 Hz)'于 at the first interpolation (for example, 9 inches... the illumination frequency is adjusted to be positive, and when the displacement amount is between the first and fourth threshold values, the illumination frequency is maintained as called. When the light source 101 is The light-emitting frequency is called, and the processing unit 1〇5 determines that the displacement of the bit (four) measuring device 1G is less than the third door plug, such as 14 inches), the light-emitting frequency of the light source 101 is adjusted to be positive, when the displacement is Still greater than the third threshold value, the illuminating frequency is maintained at yang. In the example, the gate value of increasing the light-emitting frequency is lower than the threshold value for lowering the light-emitting frequency, which can effectively reduce the power consumption of the displacement detecting device. Further, as shown in Fig. 8, continued #禅苗-,Λ The mouth W is not treated as early as 70 105. The displacement amount can also be decomposed into the horizontal displacement amount ΛΧ and the vertical displacement amount ΔΥ, respectively, compared with the first, second, third and fourth threshold values, and according to The comparison result controls the light source frequency control unit 102 to adjust the light-emitting frequency of the light source 1〇1. Except for the setting of the door value, the other implementation steps are similar to the steps shown in FIG. 8 and will not be described here. The 'light source 1〇1 can emit light at a lower luminous frequency when the displacement detection displacement is lower than the set minimum threshold value to save the displacement detecting device 1 The power consumed. ... The 18-inch driving technology saves energy by changing the image frequency and exposure time of the image sensor. It has stability and energy consumption. 01268-TW / Pix-TW-0164 .17 200912700 Saves poor performance. Compared with the prior art, the displacement detecting device of the present invention and the power saving method thereof (as shown in FIG. 5) are used to effectively illuminate the power consumed by the displacement detecting device by the illumination frequency of the light source, due to the image The exposure time of the capture unit is fixed, and the problem of poor stability can be solved. Although the present invention has been described in the foregoing preferred embodiments, it is not intended to limit the invention to any one of ordinary skill in the art to which the invention pertains. Various changes and modifications may be made without departing from the spirit and scope of the invention, and the scope of the present invention is defined by the scope of the appended claims. 〇01268-TW7 Pix-TW -0164 18 200912700 [Simplified Schematic] FIG. 1 is a perspective view of a displacement detecting device according to an embodiment of the present invention. Figure lb is a perspective view of a displacement detecting device and a corresponding image display device according to an embodiment of the present invention. Fig. 2: Fig. 3: ζ'Λ Fig. 4 is a block diagram of a displacement detecting device according to an embodiment of the present invention. In the displacement detecting device of the embodiment of the present invention, a timing chart of the image capturing frequency of the image capturing unit and the light emitting frequency of the light source is shown. The processing unit of the displacement detecting device of the embodiment of the present invention calculates a displacement amount of the displacement detecting device. Fig. 5 is a flow chart showing the power saving method of the displacement debt measuring device of the embodiment of the present invention. In the power saving method of the displacement detecting device according to the embodiment of the present invention, a schematic diagram of adaptively adjusting the lighting frequency according to the displacement amount and the at least one homing value. FIG. 6b: The displacement detecting device of the embodiment of the present invention In the power saving method, "the horizontal displacement amount, the vertical displacement amount, and at least one threshold value adaptively adjust the illumination frequency. Figure 7: In the power saving method of the displacement price measuring device according to the embodiment of the present invention, adjusting the luminous frequency according to the displacement and at least the value of the door value adaptively increases the threshold of the luminous frequency higher than the decreasing luminous frequency The threshold of the threshold. Figure 8 is a diagram showing the power saving method of the displacement detecting device according to the embodiment of the present invention, which is adapted to the horizontal displacement, the vertical displacement, and the at least one gate interpolation. 01268-TW / Pix-TW-0164 19 200912700 Figure 9: Implementation of the present invention In the power saving method of the displacement detecting device of the example, another intention is to adjust the light-emitting frequency according to the displacement amount and the at least - threshold value, wherein the gated value of increasing the light-emitting frequency is lower than the threshold of decreasing the light-emitting frequency. [Main component symbol description] 10 Displacement detecting device 100 Housing 101 Light source 102 Light source frequency control unit 103 Memory unit 104 Shirt operation unit 105 Processing unit 106 Transmission interface unit 107 Lens 20 First image 21 Reference search box 30 Second Image 31 Search box 401- ~407 Step 90 Shirt image display does not fit Jin 91 cursor Η Hole S Surface ΔΧ Horizontal displacement ΔΥ Vertical displacement FR Image capture frequency EF, EF, EF3 Light-emitting frequency A Image capture time 01268 -TW / Pix-TW-0164