'1378310 六、發明說明： ί發南所屬之技術領威 [0001] 本發明涉及一種鏡頭模組，尤其係一種具有自動對焦功 能之鏡頭模組° 【先前技術】 [0002] 自動對焦技術已廣泛應用於相機，攝像機以及影像掃描 等取像領域》自動對焦技術使得鏡頭模組能根據物體之 遠近，自動調整鏡頭模組之對焦透鏡組之位置，以使得 鏡頭模組之成像平面上之成像清晰。 [0003] 自動對焦方式大致可分為主動式自動對焦及被動式自動 對焦兩類。主動式自動對焦主要係利用發射红外線或超 聲波量度被攝物之距離，自動對焦鏡頭模組根據所獲得 之距離資料驅動透鏡組來調節像距，從而完成自動對焦 。被動式自動對焦主要係藉由接受來自被攝物之光線， 以電子視測或相位差檢測之方式完成自動對焦。 [0004]目前，常用之具有自動對焦功能之鏡頭模組通常包括： 成像光學元件；影像感測器，如電荷耦合器件（Charge Coupled Device，CCD)感測器或互補金屬氧化物半導 體（Complementary Metal Oxide Semiconductor ， CMOS)感測器；控制單元，如數位訊號處理晶片 (Digital Signal Processor, DSP)，圖像訊號處理 晶片（Image Signal pr〇cessor，isp)等；及激勵單 元。成像光學元件通常包括渡光片及對焦透鏡組β激勵 單元包括步進馬達及其驅動電路，該激勵單元接受控制 單元之控制’驅動成像光學元件中之對焦透鏡組進行位 1013206691-0 09511342#單編號A〇1(U 第5頁/共丨9頁 1378310 101年05月30日修正替換頁 [0005] [0006] [0007] [0008] 置調節，最終使影像感測器輸出準確對焦之影像。 對於該種傳統之可自動對焦鏡頭模組，其通常需要藉由 設置多個傳動機構如二至三個齒輪傳動機構，來將步進 馬達之旋轉運動轉換成線性運動。然而，該種設置使得 該種鏡頭模組之尺寸較大，難以滿足當前手機用攝像鏡 頭等攜帶型取像裝置短、小、輕、薄之發展趨勢；並且 ，由於所述多個傳動機構於機械運動之傳遞過程中會造 成背隙（Backlash)，進而會導致對焦精度不高。 有鑒於此，有必要提供一種自動對焦鏡頭模組，其具有 對焦精度高、結構緊湊等特點。 【發明内容】 下面將以實施例說明一種自動對焦鏡頭模組，其可具有 對焦精度高、結構緊湊等特點。 一種自動對焦鏡頭模組，其包括：對焦透鏡組，影像感 測器，定位元件，控制單元及音圈激勵元件。該對焦透 鏡組用於對被攝物體進行光學成像。該影像感測器設於 該對焦透鏡組之像側，用於感測該光學成像以輸出電子 影像訊號。該定位元件包括磁鐵及磁敏感測器，該磁鐵 與磁敏感測器之相對位置關係對應於所述對焦透鏡組之 實際位置。該磁敏感測器藉由感測其與該磁鐵之相對位 置關係可得到對焦透鏡組之實際位置。該控制單元用於 接收所述電子影像訊號以獲取目標對焦位置並將所述對 焦透鏡組之實際位置與該目標對焦位置進行比較以産生 控制訊號。該音圈激勵元件與所述對焦透鏡組機械連接 ，其用於接收所述控制訊號以將所述對焦透鏡組驅動至 09511342β單编號 A0101 第6頁/共19頁 1013206691-0 1378310 101年.05月· 30日梭正替換頁 該目標對焦位置。'1378310 VI. Description of the Invention: Technology Leadership of ίFannan [0001] The present invention relates to a lens module, in particular to a lens module with an autofocus function. [Prior Art] [0002] Autofocus technology has been widely used. Applied to camera, camera and image scanning, etc. Autofocus technology enables the lens module to automatically adjust the position of the focus lens group of the lens module according to the distance of the object, so that the imaging of the lens module is clear. . [0003] The autofocus mode can be roughly divided into active autofocus and passive autofocus. Active autofocus mainly uses the infrared or supersonic wave to measure the distance of the subject. The autofocus lens module drives the lens group according to the obtained distance data to adjust the image distance to complete the autofocus. Passive autofocus mainly performs autofocus by electronically measuring or phase difference detection by receiving light from the subject. [0004] At present, a commonly used lens module with an autofocus function generally includes: an imaging optical element; an image sensor such as a charge coupled device (CCD) sensor or a complementary metal oxide semiconductor (Complementary Metal) Oxide Semiconductor (CMOS) sensor; control unit, such as digital signal processor (DSP), image signal processing chip (Image Signal pr〇cessor, isp), etc.; and excitation unit. The imaging optical element generally includes a light guide sheet and a focus lens group. The β excitation unit includes a stepping motor and a driving circuit thereof, and the excitation unit is controlled by the control unit to drive the focusing lens group in the imaging optical element to perform a bit of 10132066691-0 09511342# No. A〇1 (U Page 5/Total 9 Page 1378310 Modified on May 30, 2010 Correction Replacement Page [0005] [0006] [0007] [0008] Adjusting, finally allowing the image sensor to output an image that is in focus For such a conventional autofocus lens module, it is usually necessary to convert a rotary motion of a stepping motor into a linear motion by providing a plurality of transmission mechanisms such as two to three gear transmission mechanisms. However, this setting The size of the lens module is large, and it is difficult to meet the development trend of short, small, light and thin portable imaging devices such as camera lenses for mobile phones; and, due to the mechanical movement of the plurality of transmission mechanisms This will cause a backlash, which in turn will result in low focus accuracy. In view of this, it is necessary to provide an autofocus lens module with high focusing accuracy and knot. The invention relates to an autofocus lens module, which can have the characteristics of high focusing precision and compact structure. The autofocus lens module includes a focusing lens group and image sensing. , a positioning component, a control unit and a voice coil excitation component. The focusing lens group is used for optical imaging of a subject. The image sensor is disposed on an image side of the focusing lens group for sensing the optical imaging. Outputting an electronic image signal. The positioning component includes a magnet and a magnetic sensor, and a relative positional relationship between the magnet and the magnetic sensor corresponds to an actual position of the focus lens group. The magnetic sensor detects the same The relative positional relationship of the magnets can obtain the actual position of the focus lens group. The control unit is configured to receive the electronic image signal to obtain a target focus position and compare the actual position of the focus lens group with the target focus position to generate control. a voice coil excitation element mechanically coupled to the focus lens assembly for receiving the control signal to The focus lens group is driven to 09511342β single number A0101 page 6/total 19 page 1013206691-0 1378310 101.05 month 30th shuttle replacement page The target focus position.
' -> /- -ίΛ H,' *3γ V' -> /- -ίΛ H,' *3γ V
[0009] 相較於先前技樹，所述ΐ勤對焦鏡頭模組之定位元件可 藉由磁敏感測器感測其與所述磁鐵之相對位置精確感測 所述對焦透鏡組之實際位置；並且，該鏡頭模組之音圈 激勵元件使用直接耦合驅動，沒有背隙，且可直接設計 成線性運動，不必利用傳動機構來將旋轉運動轉換成線 性運動，其可具有結構緊湊等特點。 【實施方式】 [0010] 下面將結合附圖對本發明實施例作進一步之詳細說明。 [0011] 參見圖1及圖2Α至圖2C，本實施例所提供之鏡頭模組100 ，其可進行自動對焦。該鏡透模組100包括：對焦透鏡組 10，影像感測器20，音圈激勵元件30，定位元件40及控 制單元50。 [0012] 如圖1所示，所述對焦透鏡組10用於對被攝物體進行光學 成像。該對焦透鏡組10包括多個透鏡12，14及16 ;該多 個透鏡12，14及16經由固持機構17固持在一起。該多個 透鏡12，14及16可全為塑膠透鏡；也可部分為塑膠透鏡 ，部分為玻璃透鏡。優選的，該多個透鏡12，14及16均 為非球面透鏡，每個透鏡之相對之透鏡表面均設置有抗 反射層（Anti-reflective coating)15。該對焦透鏡 組10中透鏡之數目不限於本實施例中之三個，其可為兩 個，四個或更多。該多個透鏡12，14及16中相鄰兩個透 鏡之間設置有間隔體18，其可防止相鄰兩個透鏡之間因 接觸或碰撞而導致元件損傷。 〇951·#單編號 A0101 1013206691-0 第7頁/共19頁 [0013] 所述對焦透鏡組10通常收容於圓筒形鏡筒7〇内。該鏡筒 Μ之位於對焦透鐃組ιό物側一端可設·置_:階泰孔72，該.·， 階梯孔72可用於控制經由被攝物體反射而入射至鏡筒7〇 内之光線之入射角。該鏡筒70之位於對焦透鏡組1〇像侧 一端之外圓周表面設置有外螺紋。優選的，該鏡筒7〇還 收容有位於對焦透鏡組10像側之濾光片92，如紅外截止 . 據波片。 [0014] 該鏡筒70及收容於其内之光學元件，如對焦透鏡組1〇及 濾光片92，通常設置於底座80上。該底座8〇上設置有一 · 個開口 82 ,該開口 82之外圍牆内側設置有内螺紋。該内 螺紋與設置於鏡筒70之外圓周表面之外螺紋相配合。該 鏡筒70之一端可藉由其外螺紋與所述内螺紋配合而旋入 至底座80之開口 82内。 [0015] 101年05月30日梭正替換頁 所述影像感測器2 0設於對焦透鏡組丨0之像側以用於接收 被攝物體經由對焦透鏡组10之光學成像，並將該光學成 像轉換成相應之電子影像訊號作為輸出訊號。該影像感 0 測器20可選用電荷耦合器件（CCD)感測器或互補金屬氧化 物半導體（CMOS)感測器。該影像感測器2〇的解析度可為 1. 3百萬畫素，2百萬畫素，3百萬畫素或更高。通常的’ 當影像感測器20之解析度為3百萬畫素及以上時，相應的 ，該對焦透鏡組1〇可設置有4片或更多片非球面透鏡。本 實施例中’該影像感測器2〇收容於底座80之開口 82内’ 並可由一個收容於開口 82内之陶瓷基底22承載。優選的 ，為避免灰塵或其他污染物污染該影像感測器20之畫素 點，玎於該影像感測器20之鄰近開口 82之一側設置透明 095113421?·單编號 A〇101 第8頁/共μ頁 1013206691-0 1378310 101年.05月.30日核正替Θ頁 蓋板94，如透明玻璃板。 [0016] 所述音圈激勵元件30與對焦透鏡組10機械連接~該音圈 激勵元件30接受控制單元50的控制，可驅動對焦透鏡組 10至目標對焦位置。該音圈激勵元件30包括永久磁鐵32 及線圈36。當一電流流過線圈36時，線圈36與永久磁鐵 32之間將産生一電磁力。在該電磁力之作用下，該線圈 36與永久磁鐵32之間將産生一相對運動。流經線圈36之 電流之大小變化會引起線圈36産生之磁通量（Flux)變化[0009] Compared with the prior art, the positioning component of the tracking lens module can accurately sense the actual position of the focus lens group by sensing the relative position of the focus lens assembly with the magnetic sensor; Moreover, the voice coil excitation component of the lens module uses a direct coupling drive, has no backlash, and can be directly designed to linear motion, without using a transmission mechanism to convert the rotary motion into linear motion, which can have a compact structure. [Embodiment] [0010] Hereinafter, embodiments of the present invention will be further described in detail with reference to the accompanying drawings. [0011] Referring to FIG. 1 and FIG. 2A to FIG. 2C, the lens module 100 provided in this embodiment can perform autofocus. The mirror module 100 includes a focus lens group 10, an image sensor 20, a voice coil excitation component 30, a positioning component 40, and a control unit 50. [0012] As shown in FIG. 1, the focus lens group 10 is used for optical imaging of a subject. The focus lens group 10 includes a plurality of lenses 12, 14 and 16; the plurality of lenses 12, 14 and 16 are held together by a holding mechanism 17. The plurality of lenses 12, 14 and 16 may all be plastic lenses; some may be plastic lenses and some are glass lenses. Preferably, the plurality of lenses 12, 14 and 16 are aspherical lenses, and the opposite lens surfaces of each lens are provided with an anti-reflective coating 15. The number of lenses in the focus lens group 10 is not limited to three in the embodiment, and may be two, four or more. A spacer 18 is disposed between adjacent ones of the plurality of lenses 12, 14 and 16, which prevents damage of the components due to contact or collision between adjacent two lenses. 〇951·#单号 A0101 1013206691-0 Page 7 of 19 [0013] The focus lens group 10 is normally housed in a cylindrical lens barrel 7A. The lens barrel is located at one end of the focus 铙 group, and can be set to _: stepped hole 72, which can be used to control the light incident into the lens barrel 7 through the reflection of the object. The angle of incidence. The lens barrel 70 is provided with an external thread on the outer circumferential surface of the focus lens group 1 at the image side. Preferably, the lens barrel 7 also houses a filter 92 located on the image side of the focus lens group 10, such as an infrared cutoff. [0014] The lens barrel 70 and the optical elements housed therein, such as the focus lens group 1 and the filter 92, are generally disposed on the base 80. The base 8 is provided with an opening 82, and the inner side of the peripheral wall of the opening 82 is provided with an internal thread. The internal thread cooperates with a thread disposed outside the outer circumferential surface of the lens barrel 70. One end of the barrel 70 can be screwed into the opening 82 of the base 80 by its external thread engaging the internal thread. [0015] The image sensor 20 is disposed on the image side of the focus lens group 丨0 for receiving optical imaging of the subject via the focus lens group 10, and the The optical imaging is converted into a corresponding electronic image signal as an output signal. The image sensor 20 can be selected from a charge coupled device (CCD) sensor or a complementary metal oxide semiconductor (CMOS) sensor. The image sensor 2〇 can have a resolution of 1. 3 million pixels, 2 million pixels, 3 million pixels or higher. In general, when the resolution of the image sensor 20 is 3 million pixels or more, correspondingly, the focus lens group 1 can be provided with 4 or more aspherical lenses. In this embodiment, the image sensor 2 is housed in the opening 82 of the base 80 and can be carried by a ceramic substrate 22 received in the opening 82. Preferably, in order to prevent dust or other contaminants from contaminating the pixel point of the image sensor 20, a transparent 095113421 is disposed on one side of the image sensor 20 adjacent to the opening 82. · Single number A〇101 8th Page / Total μ page 1013206691-0 1378310 101.05.30. The core is replaced by a cover sheet 94, such as a transparent glass plate. [0016] The voice coil excitation element 30 is mechanically coupled to the focus lens group 10. The voice coil excitation element 30 is controlled by the control unit 50 to drive the focus lens group 10 to a target focus position. The voice coil excitation element 30 includes a permanent magnet 32 and a coil 36. When a current flows through the coil 36, an electromagnetic force is generated between the coil 36 and the permanent magnet 32. Under the action of the electromagnetic force, a relative movement between the coil 36 and the permanent magnet 32 will occur. A change in the magnitude of the current flowing through the coil 36 causes a change in the magnetic flux (Flux) generated by the coil 36.
，進而會引起線圈36與永久磁鐵32之間的電磁力發生變 化。通常，線圈36與永久磁鐵32之間的相對位移量與流 經線圈3 6之電流之大小成正比；亦即，電流越大，該相 對位移量也越大。 [0017] 該音圈激勵元件還可包括激勵臂19。該音圈激勵元件30 可藉由該激勵壁19與對焦透鏡組10實現機械連接。該激 勵臂19穿過設置於°鏡筒70側壁之凹槽（也可為導向槽）與 固持機構17相連，經由沿如圖1中箭頭所示方向線性移動 該激勵臂19可使得固持機構17沿鏡筒70軸向方向作線性 運動，鏡筒70可保持不動。該種固持機構17之線性運動 可傳遞給對焦透鏡組10，進而可實現鏡頭模組100之自動 對焦。優選的，於鏡筒70之外側設置有導向件60，激勵 臂19與該導向件60活動連接。該導向件60可用於引導激 勵臂19之移動方向，進而可精確引導對焦透鏡組10之移 動方向。該導向件60可為導向柱或導向槽。本實施例中 ，該導向件60為一對導向柱。 [0018] 本實施例中，該永久磁鐵32固定在U形軛鐵34之一端；線 1013206691-0 09511342(^^ A〇101 ^ 9 1 / ^ 19 1 1378310 [0019] 101年05月30日接正替換頁 圈36環繞於軛鐵34之另一端且可動。該線圈36與激勵臂 19機械連接。'當向線圈3'6通入一電流時，線圈36將咿垂·、‘ 直方向（如圖1中箭頭方向所示）産生一相對於永久磁鐵32 之偏移，並可將該偏移經由激勵臂19傳遞給對焦透鏡組 10以實現鏡頭模組100之自動對焦。 可以理解的，亦可將線圈36與永久磁鐵32換位固定，亦 即，線圈36固定於軛鐵34之一端，永久磁鐵32與激勵臂 19機械連接且可動❶當向線圈36通入電流時，永久磁鐵 32將可産生一相對於線圈36之偏移’並可將該偏移經由 | 激勵臂19傳遞給對焦透鏡組10以實現鏡頭模組1〇〇之自動 對焦。 [0020] 所述定位元件40用於獲取所述對焦透鏡組10實際所處位 置，將該對焦透鏡組10之實際位置資訊輸出至控制單元 50。該定位元件40包括磁鐵42及磁敏感測器44 »該磁鐵 42可為永久磁鐵或電磁鐵。該磁敏感測器44與磁鐵42相 對設置（如圖2A所示，圖中虛線為磁力線），其與磁鐵42 的距離優選為5毫米。該種距離設置可以滿足磁鐵42與磁 着 敏感測器44之最小距離要求。該磁鐵42可經由連接桿11 與固持機構17固定或活動連接以使得磁鐵42之位置變化 能與對焦透鏡組10實際所處之位置關聯在一起；亦即， 對焦透鏡組10之位置變化可改變磁鐵42之位置，進而可 改變磁鐵42與磁敏感測器44之相對位置關係。 [0021] 該磁敏感測器44與一直流電源（未示出）形成電連接。當 磁鐵42於鏡頭模組1〇〇之自動對焦過程中因對焦透鏡組10 之位置發生變化而發生位置改變時，例如，磁鐵42相對 09511342(^單编號Α〇1ίΠ 第10頁/共19頁 1013206691-0 1378310 101年.05月.30日慘正替sirs 於磁敏感測器44偏移一定距離（如圖2B所示，圖中虛線為 :被知線'户或磁鐵4 2相對1於磁敏感測器4 4旋轉一定角度（ 如圖2C所示，圖中虛線為磁力線）等；由於該磁敏感測器 4 4於其磁敏感方向感測到之外加磁場大小及方向可發生 相應變化。該磁敏感測器4 4會根據其感測到之外加磁場 之大小或方向變化而呈現出不同之電阻值，進而可産生 不同之輸出值。該輸出值與對焦透鏡組10之實際位置相 對應。Further, the electromagnetic force between the coil 36 and the permanent magnet 32 is changed. Generally, the relative amount of displacement between the coil 36 and the permanent magnet 32 is proportional to the magnitude of the current flowing through the coil 36; that is, the greater the current, the greater the amount of relative displacement. [0017] The voice coil excitation element may further include an excitation arm 19. The voice coil excitation element 30 can be mechanically coupled to the focus lens group 10 by the excitation wall 19. The excitation arm 19 is connected to the holding mechanism 17 through a groove (also a guide groove) disposed on the side wall of the lens barrel 70, and the holding mechanism 17 can be caused to move linearly by moving the excitation arm 19 in the direction indicated by the arrow in FIG. The linear movement of the lens barrel 70 in the axial direction allows the lens barrel 70 to remain stationary. The linear motion of the holding mechanism 17 can be transmitted to the focus lens group 10, thereby achieving automatic focusing of the lens module 100. Preferably, a guide member 60 is disposed on the outer side of the lens barrel 70, and the energizing arm 19 is movably coupled to the guide member 60. The guide member 60 can be used to guide the direction of movement of the excitation arm 19, thereby precisely guiding the moving direction of the focus lens group 10. The guide member 60 can be a guide post or a guide groove. In this embodiment, the guiding member 60 is a pair of guiding columns. [0018] In this embodiment, the permanent magnet 32 is fixed to one end of the U-shaped yoke 34; the line is 1013066691-0 09511342 (^^ A〇101^9 1 / ^ 19 1 1378310 [0019] May 30, 101 The positive replacement page ring 36 surrounds the other end of the yoke 34 and is movable. The coil 36 is mechanically coupled to the excitation arm 19. 'When a current is applied to the coil 3'6, the coil 36 will sag, 'straight direction (as indicated by the direction of the arrow in FIG. 1), an offset with respect to the permanent magnet 32 is generated, and the offset can be transmitted to the focus lens group 10 via the excitation arm 19 to achieve autofocusing of the lens module 100. The coil 36 can also be transposed and fixed to the permanent magnet 32, that is, the coil 36 is fixed to one end of the yoke 34, and the permanent magnet 32 is mechanically coupled to the excitation arm 19 and is movable. When a current is applied to the coil 36, the permanent magnet 32 will produce an offset relative to the coil 36' and the offset can be transmitted to the focus lens group 10 via the excitation arm 19 to achieve autofocusing of the lens module 1[0020] [0020] The positioning element 40 For acquiring the actual position of the focus lens group 10, the focus lens group 10 The position information is output to the control unit 50. The positioning element 40 includes a magnet 42 and a magnetic sensor 44. The magnet 42 can be a permanent magnet or an electromagnet. The magnetic sensor 44 is disposed opposite the magnet 42 (as shown in Fig. 2A). The dotted line in the figure is a magnetic line), and the distance from the magnet 42 is preferably 5 mm. This distance setting satisfies the minimum distance requirement between the magnet 42 and the magnetism sensor 44. The magnet 42 can be held and held via the connecting rod 11 The mechanism 17 is fixed or movably connected such that the positional change of the magnet 42 can be associated with the actual position of the focus lens group 10; that is, the change in position of the focus lens group 10 can change the position of the magnet 42, thereby changing the magnet 42. The relative positional relationship with the magnetic sensor 44. [0021] The magnetic sensor 44 is electrically connected to a DC power source (not shown). When the magnet 42 is in focus during the autofocus process of the lens module 1 When the position of the lens group 10 changes and the position changes, for example, the magnet 42 is opposite to the 09511342 (^ single number Α〇1ίΠ page 10/19 pages 10132066691-0 1378310 101.05.30. Rs is offset by a certain distance from the magnetic sensitive detector 44 (as shown in FIG. 2B, the dotted line in the figure is: the line or the magnet 4 2 is rotated relative to the magnetic sensor 4 4 by a certain angle (as shown in FIG. 2C). The dotted line in the figure is a magnetic line), etc.; the magnitude and direction of the applied magnetic field may be correspondingly changed due to the sensing of the magnetic sensitive detector 44. The magnetic sensitive sensor 44 will sense according to the sense. The magnitude or direction of the applied magnetic field changes to exhibit different resistance values, which in turn can produce different output values. This output value corresponds to the actual position of the focus lens group 10.
[0022] 該磁敏感測器44可選用巨磁阻（Giant Magneto[0022] The magnetic sensor 44 can be selected from giant magnetoresistance (Giant Magneto)
Resistance，GMR)感測器。對·於巨磁阻感測器，其主 要包括由第一鐵磁層（如NiFe或NiFeCo/Cu/NiFe薄膜） ，第二鐵磁層，及位於該第一及第二鐵磁層之間之中間 夾層（如Cu等非鐵磁材料層）構成之多層膜結構，該第一 鐵磁層與第二鐵磁層成反鐵磁耦合。該多層膜結構具有 較大之磁阻效應，稱之為巨磁阻效應。巨磁阻效應之工 作原理通常為：當向該多層膜結構通入電流，電子於通 過第一鐵磁層時會被極化成單一自旋電子；當第一及第 二鐵磁層之磁化方向相同，該自旋電子容易通過第二鐵 磁層，從而使得該多層膜結構之電阻值較小；當第一及 第二鐵磁層的磁化方向相反，該自旋電子會産生自旋相 依散射（Spin Dependent Scattering)，從而使得該 多層結構電阻值較大。當然，該磁敏感測器44也可選用 磁阻感測器（Magneto Resistance, MR)等。 [0023] 控制單元50用於接收影像感測器20産生之電子影像訊號 以獲得目標對焦位置，並將定位元件40輸入給該控制單 〇95腦#單編號A_ 第11頁/共19頁 1013206691-0 101年05月30日修正替換頁 凡50之對焦透鏡組1〇之實際位置與該目標對焦位置訊號 造行比較双輪出控制訊號。該控’制訊號用於控制音圈激 勵元件30以實現其對對焦透鏡組1〇之位置調節。該控制 單疋50與影像感測器20，音圈激勵元件30及定位元件40 之磁敏感測器44形成電連接（未示出）。該磁敏感測器44 輪出之對焦透鏡組10之實際位置訊號可先經訊號放大器 Umplifier)放大之後再輸入控制單元5〇。 [0024] 如圖3所示’其為本實施例中鏡頭模組100之功能方塊示 意圖’箭頭所指方向為訊號傳輸方向β該鏡頭模組1〇〇之 秦 工作過程可為：對焦透鏡組1〇將被攝物體聚焦至影像感 測器20並產生表徵該被攝物體之光學成像；該影像感測 器20感測該光學成像並將其轉換成電子影像訊號，並將 該電子影像訊號輸出至控制單元50。同時，定位元件40 將表徵對焦透鏡組1〇實際位置之訊號輸出至控制單元50 。該控制單元50根據輸入之電子影像訊號設定目標對焦 位置並將該目標對焦位置與對焦透鏡組10之實際位置進 行比較以獲取該目標對焦位置與實際位置之差值，並將 · 該差值作為控制訊號輸出至音圈激勵元件30 ;該音圈激 勵元件30根據輸入之控制訊號驅動對焦透鏡組10沿圖1中 箭頭所指方向進行位置調節（也即對焦）’最終使影像感 測器20輸出準確對焦之影像。 [0025] 參見圖4，另一實施例中，對焦透鏡組10收容於鏡筒 内並直接固持於鏡筒70,上而無須設置如上述實施例所述 之固持機構，鏡筒70,之外側設置有導向件60。相應的， 定位元件40之磁鐵42直接與鏡筒70’相連；激勵臂19與 0951靡f單4號 Α0101 第 12 頁 / 共 19 頁 1013206691-0 1378310 ιοί 年 05 月 鏡筒70’直接相連且與導向件60活動連接。於鏡頭模组 i(TO,之自鲂對焦過程中，音圏.激勵元件3〇可經由其激勵 臂19直接驅動鏡/€70沿圖4中箭頭方向移動以實現鏡頭 模組100’自動對焦。 [0026] 另，本領域技術人員還可於本發明精神内做其他變化， 如適當音圈激勵元件的結構配置’定位元件的結構配置 以用於本發明等設計。 [0027] 综上所述’本發明瑞已符合發明專利要件，羡依法提出 Φ 專利申請。惟，以上所述者僅為本發明之較佳實施例， 舉凡熟悉本案技藝之人士’於援依本案發明精神所作之 等效修飾或變化，皆應包含於以下之申請專利範圍内。 【圖式簡單說明】 [0028] 圖1係本發明實施例之鏡頭模組結構局部剖示意圖。Resistance, GMR) sensor. The giant magnetoresistive sensor mainly comprises a first ferromagnetic layer (such as a NiFe or NiFeCo/Cu/NiFe film), a second ferromagnetic layer, and between the first and second ferromagnetic layers. The intermediate interlayer (such as a non-ferromagnetic material layer such as Cu) constitutes a multilayer film structure, and the first ferromagnetic layer is antiferromagnetically coupled to the second ferromagnetic layer. The multilayer film structure has a large magnetoresistance effect and is called a giant magnetoresistance effect. The giant magnetoresistance effect generally works as follows: when a current is applied to the multilayer film structure, electrons are polarized into a single spin electron when passing through the first ferromagnetic layer; when the magnetization directions of the first and second ferromagnetic layers Similarly, the spin electrons easily pass through the second ferromagnetic layer, so that the resistance value of the multilayer film structure is small; when the magnetization directions of the first and second ferromagnetic layers are opposite, the spin electrons generate spin-dependent scattering. (Spin Dependent Scattering), so that the multilayer structure has a large resistance value. Of course, the magnetic sensor 44 can also be a magnetoresistive sensor (MR) or the like. [0023] The control unit 50 is configured to receive the electronic image signal generated by the image sensor 20 to obtain a target focus position, and input the positioning component 40 to the control unit 95####11/19 pages 1013206691 -0 Correction of the replacement page on May 30, 101. The actual position of the focus lens group 1 of 50 and the target focus position signal are compared with the two-wheel control signal. The control signal is used to control the voice coil excitation element 30 to effect its positional adjustment of the focus lens group 1A. The control unit 50 is electrically coupled (not shown) to the image sensor 20, the voice coil excitation element 30 and the magnetic sensor 44 of the positioning element 40. The actual position signal of the focus lens group 10 that is rotated by the magnetic sensor 44 can be amplified by the signal amplifier Umplifier and then input to the control unit 5〇. [0024] As shown in FIG. 3, which is a functional block diagram of the lens module 100 in the present embodiment, the direction indicated by the arrow is the signal transmission direction β. The working process of the lens module 1 can be: a focusing lens group. 1 聚焦 focusing the subject to the image sensor 20 and generating optical imaging that characterizes the object; the image sensor 20 senses the optical image and converts it into an electronic image signal, and the electronic image signal Output to control unit 50. At the same time, the positioning element 40 outputs a signal indicative of the actual position of the focus lens group 1 to the control unit 50. The control unit 50 sets a target focus position according to the input electronic image signal and compares the target focus position with the actual position of the focus lens group 10 to obtain a difference between the target focus position and the actual position, and uses the difference as The control signal is output to the voice coil excitation component 30; the voice coil excitation component 30 drives the focus lens group 10 to adjust the position (ie, focus) in the direction indicated by the arrow in FIG. 1 according to the input control signal. [Final image sensor 20 is finally obtained. Outputs an image that is in focus. [0025] Referring to FIG. 4, in another embodiment, the focus lens group 10 is received in the lens barrel and directly held on the lens barrel 70 without setting the holding mechanism as described in the above embodiment, the lens barrel 70, and the outer side. A guide 60 is provided. Correspondingly, the magnet 42 of the positioning component 40 is directly connected to the lens barrel 70'; the excitation arm 19 is directly connected to the 0951#f single 4th Α0101 page 12/19 page 10132269361-0 1378310 ιοί year month lens barrel 70' It is movably connected to the guide member 60. In the lens module i (TO, during the self-focusing process, the excitation component 3 can directly drive the mirror/€70 through the excitation arm 19 to move in the direction of the arrow in FIG. 4 to realize the lens module 100' autofocus. In addition, those skilled in the art can also make other changes within the spirit of the present invention, such as the structural configuration of the appropriate voice coil excitation component, the structural configuration of the positioning component for use in the design of the present invention, etc. [0027] The invention has been in conformity with the requirements of the invention patent, and the Φ patent application is filed according to law. However, the above description is only a preferred embodiment of the present invention, and those who are familiar with the skill of the present invention are in the spirit of the invention. [0028] FIG. 1 is a partial cross-sectional view showing the structure of a lens module according to an embodiment of the present invention.
[0029] 圖2 A係本發明實施例定位元件中磁鐵與磁敏感測器處於 圖1所示相對位置時磁鐵産生之磁力線與磁敏感測器位置 關係示意圖β [0030] 圖2Β係圖2Α所示磁鐵相對於磁敏感測器偏移一定距離後 該磁鐵産生之磁力線與磁敏感測器之位置關係示意圖。 [0031] 圖2C係圖2Α所示磁鐵相對於磁敏感測器旋轉一定角度後 該磁鐵産生之磁力線與磁敏感測器之位置關係示意圖。 [0032] 圖3係本發明實施例之鏡頭模組之功能方塊示意圖。 [0033] 圖4係本發明另一實施例之鏡頭模組結構局部剖示意圖。 【主要元件符號說明】 095靡 W101 第13頁/共19頁 1013206691-0 1378310 101年05月30日核正替换頁 [0034] 自動對焦鏡頭模組：1 00, 1 00’ [0035] 對焦透鏡組：10 [0036] 連接桿：11 [0037] 非球面透鏡：12, 14, 16 [0038] 抗反射層：15 [0039] 固持機構：172A is a schematic diagram showing the relationship between the magnetic force lines generated by the magnet and the position of the magnetic sensor when the magnet and the magnetic sensor are in the relative position shown in FIG. 1 in the positioning component of the embodiment of the present invention. [0030] FIG. 2 is a diagram of FIG. A schematic diagram showing the positional relationship between the magnetic lines of force generated by the magnet and the magnetic sensitive detector after the magnet is offset from the magnetic sensitive detector by a certain distance. 2C is a schematic view showing the relationship between the magnetic lines generated by the magnet and the position of the magnetic sensor after the magnet shown in FIG. 2A is rotated by a certain angle with respect to the magnetic sensor. 3 is a functional block diagram of a lens module according to an embodiment of the present invention. 4 is a partial cross-sectional view showing the structure of a lens module according to another embodiment of the present invention. [Description of main component symbols] 095靡W101 Page 13 of 191013206691-0 1378310 Correction page of May 30, 101 [0034] Autofocus lens module: 1 00, 1 00' [0035] Focus lens Group: 10 [0036] Connecting rod: 11 [0037] Aspheric lens: 12, 14, 16 [0038] Anti-reflection layer: 15 [0039] Holding mechanism: 17
[0040] 間隔體：1 8 [0041] 激勵臂：19 [0042] 影像感測器：20 [0043] 陶瓷基底：22 [0044] 音圈激勵元件：30 [0045] 永久磁鐵：32[0040] Spacer: 1 8 [0041] Excitation arm: 19 [0042] Image sensor: 20 [0043] Ceramic substrate: 22 [0044] Voice coil excitation element: 30 [0045] Permanent magnet: 32
[0046] 軛鐵：34 [0047] 線圈：36 [0048] 定位元件：40 [0049] 磁鐵：42 [0050] 磁敏感測器：44 [0051] 控制單元：50 [0052] 導向件：60 09511342(Ρ编號 Α〇101 第14頁/共19頁 1013206691-0 1378310 [0053] [0054] ' [0055] ' [0056] • [0057] ' [0058] 鏡筒：70, 70’ 階梯孔：72 底座：80 開口 ： 82 濾光片：92 透明蓋板：94 10Ϊ年.05月30日核正替杉TS；Yoke: 34 [0047] Coil: 36 [0048] Positioning element: 40 [0049] Magnet: 42 [0050] Magnetic sensor: 44 [0051] Control unit: 50 [0052] Guide: 60 09511342 (Ρ编号Α〇101第14页/19 pages 10132066691-0 1378310 [0054] '[0056] [0058] '[0058] Lens barrel: 70, 70' stepped hole: 72 Base: 80 Opening: 82 Filter: 92 Transparent cover: 94 10 years. May 30th, nuclear replacement for the TS;
嶋逝^單編號删1 第15頁/共19頁 1013206691-0嶋逝^单编号删1 Page 15 of 19 1013206691-0