1302610 ， 九、發明說明： 【發明所屬之技術領域】 本發明係有關一種手持行動裝置之可變焦照相模組， 其包括由液體鏡頭及鏡片組組成的照相模組，同時具有織 焦及對焦的功能，且適用於手持行動裝置。 义 【先前技術】 由於電子技術的快速發展，許多手持行動裝置已具備 > 有照相功能，並且照相模組都朝向小型化發展。為著達到 變焦功能以及縮小照相模組的體積，目前技術皆利用二君等 式鏡片組的鏡頭配合移動中間及後群的鏡片組以達到變焦 及對焦的目的。然而此種結構對於手持行動裝置，例如手 機、PDA(個人數位助理）···等而言，體積過於龐大。因此 先前技術有液體鏡頭的發明。 與液體鏡頭相關的專利’請參考公告於20Q2年4月9日 美國專利第US 6,369,954B1號之「具不同焦距的鏡頭」 .(亦為PCT Pub. No· WO 99/18456);公開於2〇〇5年1月 6 日 美國專利公開US 2005/0002113A1號之「液滴聚集裝置」 係為Varioptic公司所申請，以及公開於2〇〇5年5月26日美 國專利公開US 2005/0113912A1號之「可變焦鏡頭」係為 Philips公司所申請。 上述先前技術的液體鏡頭都是將兩種互不相溶合 (non-miscible)且具有不同折射率的液體裝入一透明的柱 狀容器當中，並施加電壓來改變容器裏兩種液體的極性， 5 1302610 ^過表面張力的變化來改變液體間交界面的曲率，以達到 偏折光線的目的。茲以美國專利公開號US 2005/ 0113912 A1為例說明如下。 請參閱第一圖及第二圖，為根據美國專利公開號US 2005/0113912 A1之可變焦鏡頭的剖面示意圖。該可變焦 鏡頭包括有一圓筒狀的第一電極2a係形成一毛細狀管體， 並且為一透明的前面元件4a及一後面元件6a所封住（4a、 6a通常為光學破璃），以形成一液體容室5a。該液體容室 齡 5a容置有兩種不可溶混的液體a及B。液體A為不導電性 液體，例如矽油；液體B為導電性液體，例如含有鹽溶液 的水。該第一電極2a為金屬材料製成且鍍有一絕緣層8a， 該絕緣層8a鍍有一液體接觸層10a，例如鐵氟龍。上述液 體接觸層1 〇3疋用以減少液體的凹凸面（meniscus)i4與液 體容室的圓筒狀壁面接觸角度的滯後現象（hysteresi s)。 一第二電極12a設於該液體容室5&的一端並且安排至少一 部份位於該液體容室5a内，藉此該第二電極12a作用於液 ’體B。 當施加不同電壓VI及V2於第一電極2a及第二電極12a 之間可以改變上述液體B的液體曲面14，藉此以改變光的 折射角度而形成不同的焦距。 然而上述液體鏡頭存在有球面像差的缺點，並且在不 同焦距位置之間的切換頗為耗時，亦即精準的控制液體間 交界面的曲率變化到光學計算得到的數值，需耗費相當的 間。甚且’右同利用多個液體鏡頭來達到光學變焦及 6 自動對焦的功能’所需要的時 用上述液體鏡頭以作為具有變 命久，因此若單純利 組，仍有許多不完善之處需加；;克:動對焦功能的鏡頭模 緣是，本發明人有感上述缺二 設計合理对収善上祕失之切=善，乃提出一種 【發明内容】 昭相明之ΐ要目的係提供—種手持行動裝置之可變隹 …、相拉組，不僅具有小型化 郓衣直乙』艾，、、、 且兼星右找# g ώ 4 和而適用於手持行動裝置， I具有變焦及自動對焦的功能。 本發明之另一目的係提供一 照相模組，整合日3__^種手^亍動裝置之可變焦 省成本，ϋ、隹+、、、…動凡件以簡化整體結構並節 亚且進-步可以提昇變焦及對焦的時間。 變焦照相之!的’本發明提供—種手持行動裝置之可 像d吴二已括i焦模組、一自動對焦模組及-影 感成I态。该變焦模組具有_第 ^ 頭係固定㈣第H 同及至少—液體鏡 筒係位於· 一梦二，5亥自動對焦模組具有-第二鏡 内部用、、7 爛底°卩，—鏡片組係岐於該第二鏡筒 該減_職體鏡頭的影像且紅像差與色散， 包括有至少—非球面鏡片或模造麵鏡片，以及 第-於5㈣—鏡筒的底部且沿料方向驅動該 二鏡㈣調整上述影像焦距；該影像感測器設置於該第 _的底部以接收上述影像並轉換成電子訊號。 :、、、達上id之另目的’本發明之手持行動裝置之可變 1302610 焦照相模組，進一步包括一驅動晶片用以驅動該液體鏡頭 内液體變化其交界面的曲率及控制該致動器的動作。此 外，其中該驅動晶片内設有一查詢對照表，該查詢對照表 提供光學變焦倍率相對應於該液體鏡頭内液體交界面的曲 率。 相較液體鏡頭或具三群鏡片組的傳統變焦鏡頭，本發 明利用液體鏡頭以縮減照相模體的體積並達到變焦的功 能，此外設置一鏡片組以修正液體鏡頭成像時所產生的像 差與色散，進一步利用致動器移動上述鏡片組對經過該液 體鏡頭的影像調整焦距以達到清晰影像的目的。再者，整 合後的照相模組的驅動元件不僅簡化整體結構並且節省成 本，此外進一步可以提昇變焦及對焦的時間。 茲配合圖式將本發明之較佳實施例詳細說明如下，但 是此等說明僅係用來說明本發明，而非對本發明的權利範 圍作任何的限制。 【實施方式】 請參閱第三圖，為本發明之手持行動裝置之可變焦照 相模組的剖視圖。本發明提供一種手持行動裝置之可變焦 照相模組1係包括一變焦模組2、一自動對焦模組3及一影 像感測器4乃設置於自動對焦模組3下方以接收影像且轉換 成電子訊號。為固定本發明之可變焦照相模組1，通常設 有一殼體（未圖示）以收容並固定上述所有元件。 上述變焦模組2主要是利用液體鏡頭來達成，其包括 13 026 ίο =弟&同20以及至少一液體鏡頭21固定於該第一鏡筒 内：在本實施例中該變焦模組2具有二液體鏡頭21及 ▲藉此可達到更大雙焦範圍。由於液體鏡頭的原理已在 則面敘述過，因此不在此贅述。 上述自動對焦模組3主要是利用可移動的鏡片組，以 1十對經過該變焦模組2的影像進行焦距調整並且修正該變 ΐ模組2所產生的相差。該自動對焦模組3包括有一第二鏡 =係位於該第-鏡⑽底部，以及_致動器難、設置於 二呆-鏡同20的底部且沿光轴方向驅動該第二鏡筒犯。其 ㈣第二鏡賴㈣固定有—鏡片_改善修正液體鏡頭 成像時所產生的像差與色散，料，該致動器31可 / 口者先軸方向移動該鏡片組與上述變焦模㈣的距離以進 打光學對焦，達到清晰成像的目的。 更：體的說，本實施例中該鏡片組是由兩片鏡片33及 34所組成，例如可以包括—扑 ^ μ 5表面鏡片及-非球面鏡片，或 關· 7鏡片’ #然該鏡片組亦可為模造玻璃 fgGlass)鏡片。藉由該等鏡片組以有效改善影像 上述液舰頭21及22、及魏㈣_需要有外接線 路（未圖不）及驅動積體電路以分別控制液體鏡頭中液體交 界面的曲^變化以及該致動器31的移動。本實施例中，該 影像感測益4乃是設置於一電路板5上。 上述致動器31可以是步進馬達（stepping motor)、音 圈馬達(v〇lce C0ll m〇t〇r)或者是壓電式馬達(p咖 9 1302610 motor)，其中壓蕾 & 之包式馬達為一較佳的選擇。壓電式馬達是 古^ /呵包壓驅動，一面具有耗電量小的優點，另一 91 捋性與液體鏡頭相近，因此可與液體鏡頭 21及22整合在同1_晶片上。 β發明具有一特徵在於，該電路板5設置有 一整合的驅動晶Η ς λα ^ ，〜驅動晶片52内整合有驅動該致動 态的電路，不僅π田、 、， 了用以驅動該液體鏡頭21、22内液體交界 、此^並且可用以控制該致動器31的動作。 卜本發明的驅動晶片52利用look up table演算法 1 體交界_鱗變化，以達成光學變焦 = 二制^亦即本發明在該驅動晶片内預先儲存有一查 ' ^查询對照表提供光學變焦倍率相對應於該液 體鏡頭内液體交尺而方 ._ ^ 人界面的曲率。再仔細的說，某一特定的液 二二面的曲率是相對應於某-固定的光學變焦倍率，另 兮斗寸疋的液肢父界面的曲率又是相對應於另一固定的光學 又…、彳口卞兩者關係是一對一的。因此本發明預先將兩者 相對應的關係—1列出對照表，並就儲存，藉此可以 迅缸準確的達到控制縣、倍率的目的 。不需要如先前技 術耩/工制迴路不斷的嘗試以趨近於正確值。 其中上述影像感測器4乃是設置於該第二鏡筒32的底 部以接收影像且轉換成電子訊號。該影像感測器4可以是 互補式金屬氣化半導體（CMOS, Complementary Metal Oxide Semiconductor)，或者是電荷耦合元件（CCD， Charge Coupled Device)。 10 1302610 請參考第四圖，為本發明之可變焦照相模組設置於_ 手持式行動裝置的剖視示意圖。本發明之可變焦照相模組 1可以進一步設置一反射元件6位於該第一鏡筒2〇的上方以 形成一潛望式可變焦照相模組1。上述反射元件6可以是鏡 子。藉由該反射元件6，可改變該可變焦照相模組丨的光軸 方向，變為平行於手持式行動裝置100的方向，光線L先 經過一窗口 102並經該反射元件6彎折9〇度後進入該可變焦 照相模組1。此實施例的優點在於避免增加手持式行動裝 置的厚度。 〔本發明之發明特徵及特點〕 因此藉本發明所能產生之特點及功能經整理如后： 一、本發明之手持行動裝置之可變焦照相模組，利用 液體鏡頭而有效縮小整體體積而適用於手持行動裝置，並 且利用致動為移動一鏡片組，而達到兼具有變焦及自動對 焦的功能。 一、 本發明之手持行動裝置之可變焦照相模組整合了 照相模組的驅動元件在—驅動晶片以簡化整體結構並^ 成本。 二、 本發明之手持行動裝置之可變焦照相模組進一步 汉有查4)對絲於驅動晶#，藉此控制液體鏡頭内液體 交界面的曲率變化，以達到加快變焦的目的。 且 四、本發明之手持行動裝置之自動聽照相模組進— 步具有微觸:t之功能，作為光學變焦之對焦補償。 11 1302610 五、本發明之手持行動裝置之可變焦照相模組進一步 設有一反射元件可改變光線行進之方向，可使此照相模組 設置於手持行動裝置内而不會增加手持行動裝置的厚度。 綜上所述，本發明實已符合發明專利之要件，依法提 出申請。惟以上所揭露者，僅為本發明較佳實施例而已， 自不能以此限定本發明之權利範圍，因此依本發明申請範 圍所做之均等變化或修飾，仍屬本發明所涵蓋之範圍。 【圖式簡單說明】 第一圖：根據美國專利公開號US 2005/0113912 A1之 可變焦鏡頭的剖面示意圖。 第二圖：根據美國專利公開號US 2005/0113912 A1之 可變焦鏡頭另一狀態的剖面示意圖。 第三圖：為本發明之手持行動裝置之可變焦照相模組 的剖視圖。 第四圖：為本發明之可變焦照相模組設置於一手持式 行動裝置的剖視示意圖。 【主要元件符號說明】 〔先前技術〕 第一電極 2a 前面元件 4a 液體容室 5a 後面元件 6a 絕緣層 8a 液體接觸層 10a 12 1302610 液體曲面 141302610, IX, invention: [Technical Field] The present invention relates to a zoom camera module for a handheld mobile device, which comprises a camera module composed of a liquid lens and a lens group, and has a focus and focus Features and is suitable for handheld mobile devices. [Prior Art] Due to the rapid development of electronic technology, many handheld mobile devices have been equipped with camera functions, and camera modules are moving toward miniaturization. In order to achieve the zoom function and reduce the size of the camera module, the current technology utilizes the lens of the Erjun lens group to match the lens group of the middle and rear groups to achieve zooming and focusing. However, such a structure is too bulky for a handheld mobile device such as a mobile phone, a PDA (Personal Digital Assistant), and the like. Therefore, the prior art has the invention of a liquid lens. "Patents with different focal lengths" (also known as PCT Pub. No. WO 99/18456); published in 2, US Patent No. 6,369,954 B1, issued April 9, 20, 2002. U.S. Patent Publication No. 2005/0002,113, the disclosure of which is incorporated herein by reference in its entirety by U.S. Pat. The "Zoomable Lens" is applied by Philips. The liquid lens of the prior art described above incorporates two liquids of non-miscible and different refractive indices into a transparent cylindrical container and applies a voltage to change the polarity of the two liquids in the container. , 5 1302610 ^ Change in surface tension to change the curvature of the interface between liquids to achieve the purpose of deflecting light. The following is exemplified by U.S. Patent Publication No. US 2005/0113912 A1. Please refer to the first and second figures, which are schematic cross-sectional views of a zoom lens according to US Patent Publication No. US 2005/0113912 A1. The zoom lens comprises a cylindrical first electrode 2a forming a capillary tube body and sealed by a transparent front member 4a and a rear member 6a (4a, 6a are usually optically broken), A liquid chamber 5a is formed. The liquid chamber age 5a houses two immiscible liquids a and B. Liquid A is a non-conductive liquid such as eucalyptus oil; liquid B is a conductive liquid such as water containing a salt solution. The first electrode 2a is made of a metal material and is plated with an insulating layer 8a plated with a liquid contact layer 10a such as Teflon. The liquid contact layer 1 〇 3 疋 is used to reduce the hysteresis of the contact angle between the liquid meniscus i4 and the cylindrical wall surface of the liquid chamber. A second electrode 12a is provided at one end of the liquid chamber 5 & and at least a portion is disposed in the liquid chamber 5a, whereby the second electrode 12a acts on the liquid body B. The liquid curved surface 14 of the liquid B can be changed between the first electrode 2a and the second electrode 12a by applying different voltages VI and V2, thereby forming different focal lengths by changing the angle of refraction of the light. However, the liquid lens described above has the disadvantage of spherical aberration, and the switching between different focal length positions is quite time consuming, that is, the precise control of the curvature change of the interface between the liquids to the optically calculated value requires a considerable amount of time. . Even when the right side uses multiple liquid lenses to achieve optical zoom and 6 autofocus functions, it is necessary to use the above liquid lens as a variable life. Therefore, if it is simple, there are still many imperfections. Plus;; gram: the lens rim of the moving focus function is, the inventor has the feeling that the above-mentioned lack of design is reasonable, and the goodness of the sacredness is good, and it is proposed that [the content of the invention] - A variety of handheld mobile devices..., phase pull group, not only has a small size, but also has a zoom and Auto focus function. Another object of the present invention is to provide a camera module that integrates the zooming and cost-saving of the hand-held device, ϋ, 隹+, ,,..., to simplify the overall structure and to advance - Steps can increase the zoom and focus time. The present invention provides a handheld mobile device that can be used as an i-focus module, an auto-focus module, and a video sensor. The zoom module has a _th head system fixed (four) the same H and at least - a liquid lens tube is located in a dream two, 5 Hai auto focus module has - the second mirror internal use, 7 bad bottom ° 卩, - The lens group is mounted on the second lens barrel to reduce the image of the lens and the red aberration and dispersion, including at least an aspherical lens or a molded surface lens, and a first to the fifth (four)-the bottom of the lens barrel and along the material The direction drives the two mirrors (4) to adjust the image focal length; the image sensor is disposed at the bottom of the first image to receive the image and convert into an electronic signal. The variable 1302610 focal camera module of the handheld mobile device of the present invention further includes a driving chip for driving the liquid in the liquid lens to change the curvature of the interface and controlling the actuation. The action of the device. In addition, a query look-up table is provided in the driving chip, and the query comparison table provides an optical zoom ratio corresponding to the curvature of the liquid interface in the liquid lens. Compared with a liquid lens or a conventional zoom lens having a three-group lens group, the present invention utilizes a liquid lens to reduce the volume of the camera body and achieve the zoom function, and further provides a lens group to correct the aberration generated by the liquid lens imaging. Dispersion, further utilizing the actuator to move the lens group to adjust the focal length of the image passing through the liquid lens to achieve a clear image. Moreover, the integrated driving elements of the camera module not only simplify the overall structure but also save costs, and further increase the zoom and focus time. The preferred embodiments of the present invention are described in detail below with reference to the accompanying drawings, but the description of the invention is not intended to limit the scope of the invention. [Embodiment] Please refer to the third figure, which is a cross-sectional view of a zoom lens module of the handheld mobile device of the present invention. The zoom camera module 1 of the handheld mobile device includes a zoom module 2, an auto focus module 3 and an image sensor 4 disposed under the auto focus module 3 to receive images and convert into Electronic signal. To secure the zoom camera module 1 of the present invention, a housing (not shown) is generally provided to receive and secure all of the above components. The zoom module 2 is mainly realized by using a liquid lens, and includes 13 026 ίο=different & 20 and at least one liquid lens 21 is fixed in the first lens barrel: in the embodiment, the zoom module 2 has The two liquid lenses 21 and ▲ can achieve a larger bifocal range. Since the principle of the liquid lens has been described in the following, it will not be described here. The above-mentioned autofocus module 3 mainly uses a movable lens group to perform focal length adjustment on a pair of images passing through the zoom module 2 and corrects the phase difference generated by the variable module 2. The autofocus module 3 includes a second mirror=located at the bottom of the first mirror (10), and the _actuator is difficult to be disposed at the bottom of the two mirrors 20 and drives the second mirror in the optical axis direction. . The fourth mirror (4) is fixed with a lens to improve the aberration and dispersion generated when the liquid lens is imaged. The actuator 31 can move the lens group and the zoom mode (4) in the axial direction. The distance is optically focused for clear imaging. More specifically, in the embodiment, the lens group is composed of two lenses 33 and 34, and may include, for example, a surface lens and an aspherical lens, or a closed lens. The group can also be a molded glass fgGlass lens. By using the lens groups to effectively improve the image, the liquid warheads 21 and 22, and Wei (four) _ need to have an external circuit (not shown) and drive the integrated circuit to separately control the change of the liquid interface in the liquid lens and The movement of the actuator 31. In this embodiment, the image sensing benefit 4 is disposed on a circuit board 5. The above actuator 31 may be a stepping motor, a voice coil motor (v〇lce C0ll m〇t〇r) or a piezoelectric motor (p coffee 9 1302610 motor), wherein the pressure bud & A motor is a preferred choice. The piezoelectric motor is driven by the ancient ^ / oh package, one side has the advantage of low power consumption, and the other 91 is similar to the liquid lens, so it can be integrated with the liquid lens 21 and 22 on the same 1_ wafer. The β invention has a feature in that the circuit board 5 is provided with an integrated driving transistor λλα ^ , and the driving chip 52 is integrated with a circuit for driving the dynamics, not only the π field, but also for driving the liquid lens. The liquid junction in 21, 22, and this can be used to control the action of the actuator 31. The driving chip 52 of the present invention utilizes a lookup table algorithm 1 body boundary _ scale change to achieve optical zoom = two systems, that is, the present invention pre-stores a query in the driving chip to provide optical zoom magnification. Corresponds to the curvature of the liquid interface in the liquid lens. _ ^ The curvature of the human interface. To be more careful, the curvature of a particular liquid two-sided surface corresponds to a certain fixed optical zoom magnification, and the curvature of the liquid-anterior interface of the other bucket is corresponding to another fixed optical ..., the relationship between the two is one-on-one. Therefore, the present invention pre-registers the relationship between the two - 1 and lists them, and stores them, thereby achieving the purpose of controlling the county and the rate accurately. There is no need to continually try to approach the correct values as in the prior art/work loops. The image sensor 4 is disposed at the bottom of the second lens barrel 32 to receive images and convert into electronic signals. The image sensor 4 may be a Complementary Metal Oxide Semiconductor (CMOS) or a Charge Coupled Device (CCD). 10 1302610 Please refer to the fourth figure for a schematic cross-sectional view of the zoom camera module of the present invention disposed on the handheld mobile device. The zoom camera module 1 of the present invention may further be provided with a reflective member 6 positioned above the first lens barrel 2 to form a periscope zoom camera module 1. The above reflective element 6 may be a mirror. By means of the reflective element 6, the optical axis direction of the zoom camera module can be changed to become parallel to the direction of the handheld mobile device 100. The light L passes through a window 102 and is bent through the reflective element 6. After entering the zoom camera module 1 . An advantage of this embodiment is that it avoids increasing the thickness of the hand-held mobile device. [Features and Features of the Invention] Accordingly, the features and functions that can be produced by the present invention are as follows: 1. The zoom camera module of the handheld mobile device of the present invention utilizes a liquid lens to effectively reduce the overall volume. The handheld mobile device is used, and the action is to move a lens group to achieve the function of zooming and autofocusing. 1. The zoom camera module of the handheld mobile device of the present invention integrates the drive elements of the camera module to drive the wafer to simplify the overall structure and cost. 2. The zoom camera module of the handheld mobile device of the present invention further detects 4) the wire to drive the crystal #, thereby controlling the curvature change of the liquid interface in the liquid lens to achieve the purpose of speeding up the zoom. And, the automatic listening camera module of the handheld mobile device of the present invention has the function of micro touch: t, as the focus compensation of the optical zoom. 11 1302610 5. The zoom camera module of the handheld mobile device of the present invention is further provided with a reflective element for changing the direction in which the light travels, so that the camera module can be placed in the handheld mobile device without increasing the thickness of the handheld mobile device. In summary, the present invention has been in conformity with the requirements of the invention patent and has been filed according to law. However, the above disclosure is only the preferred embodiment of the present invention, and the scope of the present invention is not limited thereto, and thus the equivalent variations or modifications made to the scope of the present invention are still within the scope of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS First: A schematic cross-sectional view of a zoom lens according to US Patent Publication No. US 2005/0113912 A1. Fig. 2 is a schematic cross-sectional view showing another state of the zoom lens according to U.S. Patent Publication No. US 2005/0113912 A1. Figure 3 is a cross-sectional view of a zoom camera module of the handheld mobile device of the present invention. Figure 4 is a cross-sectional view showing the zoom camera module of the present invention disposed on a hand-held mobile device. [Major component symbol description] [Prior art] First electrode 2a Front element 4a Liquid chamber 5a Rear element 6a Insulating layer 8a Liquid contact layer 10a 12 1302610 Liquid curved surface 14
液體 A 液體 B 〔本發明〕 可變焦照相模組1 變焦模組 2Liquid A liquid B [present invention] zoom camera module 1 zoom module 2
第一鏡筒 20 液體鏡頭 21,22 自動對焦模組3 致動器 31 弟一鏡同 32 鏡片 33，34 影像感測器 4 電路板 5 驅動晶片 52 反射元件 6 手持式行動裝置100 窗口 102First lens barrel 20 Liquid lens 21, 22 Autofocus module 3 Actuator 31 Brother one mirror 32 Lens 33, 34 Image sensor 4 Circuit board 5 Driver wafer 52 Reflecting element 6 Handheld mobile device 100 Window 102
光線 L 13Light L 13