200841066 >九、發明說明： -【發明所屬之技術領域】 尤其涉及一種具有良好抗 本發明涉及一種鏡頭模組 電磁波干擾能力之鏡頭模組。 【先前技術】 照相功能已成為各種僧輝— 勺合種使柘式電子產品如手 字助理（PDA)不可或缺之主要功夕 成及1U人歎 , 一 之主要功旎之-。照相模組通常包 括至少一個鏡頭模組，以一200841066 > Nine, invention description: - [Technical field to which the invention pertains] In particular, the invention relates to a lens module which has good resistance to electromagnetic interference of a lens module. [Prior Art] The camera function has become a variety of 僧 — 勺 勺 勺 勺 勺 柘 柘 柘 电子 电子 电子 电子 电子 电子 电子 电子 电子 电子 电子 电子 电子 电子 电子 电子 电子 PDA PDA PDA PDA PDA PDA PDA PDA PDA PDA PDA PDA PDA PDA PDA PDA PDA PDA The camera module usually includes at least one lens module, one
、 彳口與鏡頭板纟且相對設置之影 像感測器元件。鏡頭模組通常包括镑 ° 〜 Φ匕枯鏡頊座、设置於鏡頭座 之鏡筒、以及沿光軸方向依次固定 一 J欲人固疋於鏡同内之透鏡組、間 隔環與濾光片等光學元件。而影像感測器元件通常封裝於 鏡頭座内，減接封裝於㈣筒底部，與鏡賴組配合用 於成像。 惟，習知鏡頭模組之鏡頭座與鏡筒之材料以塑料如 PC/ABS( ?炎丙烯/丙稀腈_丁二稀_苯乙烯）I程塑料、聚四 鲁氣乙稀等居多’通常不具備良好抗電磁波干擾能力，影像 感測器元件容易受到外界電磁波之干擾而產生噪聲，導致 無法獲得清晰圖像，造成成像質量不佳。特別當成像解析 度較高時，外界電磁波對影像感測器元件之 量之影響就更為明顯。 像貝 【發明内容】 有鑑於此，提供一種具有良好抗電磁波干擾能力之鏡 頭核組’以有效提南成像質量實屬必要。 ' 以下以實施例說明一種鏡頭模組。 6 200841066 ^ 所述鏡頭模組，其包括鏡頭座以及固定於鏡頭座之鏡 -筒。該鏡筒内沿光軸方向依次容納有濾光片、間隔環以及 透鏡組。該鏡頭座外表面具有電磁屏蔽層，該電磁屏蔽層 為碳奈米管/聚合物複合材料，其包括聚合物基體以及分散 於聚合物基體中之碳奈米管。 相對於先前技術，所述鏡頭模組在鏡頭座之外表面設 置有電磁屏蔽層，該電磁屏蔽層由碳奈米管/聚合物複合材 料形成，具有良好抗電磁波干擾能力，可有效屏蔽外界電 •磁波，大大降低電磁波對與鏡頭模組相配合之影像感測器 元件之干擾，從而提高成像質量。 【實施方式】 以下結合附圖本技術方案實施例提供之鏡頭模組作進 一步說明。 請一併參閱圖1與圖2，實施例提供之鏡頭模組10， 其包括鏡筒110、濾光片120、間隔環130、透鏡組140及 鏡頭座150。 ® 該鏡筒110呈圓筒體，用於容納濾光片120、間隔環 130以及透鏡組140。該鏡筒110包括第一端部111及相對 之第二端部112。該第一端部111設有入光孔113，光線可 由該入光孔113進入鏡頭模組10，並依次透過濾光片120 與透鏡模組140。該第二端部112之外壁可設有螺紋，其 用於與鏡頭座150所設之螺紋相配合，使得鏡筒110可固 定於鏡頭座150。當然，鏡筒110亦可由其他方式固定於 鏡頭座150。 200841066 • 由鏡筒110之第一端部111至第二端部112，濾光片 ▲ 120、間隔環130以及透鏡組140沿光軸方向依次固定於鏡 筒110内。 該鏡頭座150具有容置孔151，用於容納固定鏡筒110 與影像感測器元件20。該鏡頭座150具有第一基座端152 及相對之第二基座端153。該第一基座端152内壁設有螺 紋，其與鏡筒110之第二端部112外壁之螺紋相配合，用 於將鏡筒110固定於鏡頭座150。該第二基座端153可用 籲於與其他元件或裝置相連。本實施例中，該第二基座端153 固定於封裝有影像感測器元件20之電路板22上，從而使 得影像感測器元件20設置於該第二基座端153。該影像感 測器元件20將由入光孔113進入鏡頭模組10，並依次透 過濾光片120與透鏡模組140之光訊號轉換成電訊號，從 而形成圖像。該影像感測器元件20可為電荷耦合元件 (Charge Coupled Device，CCD )或者互補金屬氧化物半導 體元件(Complementary Metal Oxide Semiconductor， CMOS)。 此外，該鏡頭座150具有外表面154與内表面155， 該外表面154具有電磁屏蔽層30,用於屏蔽外界電磁波對 影像感測器元件20之干擾，從而提升成像質量。該電磁屏 蔽層30之厚度範圍為1-100微米。當然，電磁屏蔽層30 之厚度亦可根據實際需求設計。 該電磁屏蔽層30之材料為碳奈米管/聚合物複合材 料。該碳奈米管/聚合物複合材料包括聚合物基體以及分散 200841066 A於該聚合物基體中之碳奈米管。聚合物基體可為熱塑性樹 -脂如丙烯酸樹脂、熱固性樹脂如環氧樹脂，或者紫外硬化 樹脂如矽樹脂等。碳奈米管可為單壁碳奈米管或多壁碳奈 米管。 於鏡頭座150之外表面154形成電磁屏蔽層30之方法 如下：首先，採用直接分散混合法製作呈液態之碳奈米管/ 聚合物複合材料。其具體方法為：將聚合物基體溶解於水、 丙酮、乙醇、異辛烷或曱笨等溶劑中形成混合溶液；利用 _超聲波將碳奈米管直接分散到聚合物基體溶解於溶劑形成 之混合溶液中，從而形成液態碳奈米管/聚合物複合材料。 其次，將液態碳奈米管/聚合物複合材料塗佈於鏡頭座150 之外表面154形成電磁屏蔽層30。其具體方法為：將液態 碳奈米管/聚合物複合材料採用刷塗、浸塗或喷塗等方法塗 佈於鏡頭座150之外表面154 ;將碳奈米管/聚合物複合材 料進行自然固化、加熱固化或者紫外固化，於固化過程中， I液態碳奈米管/聚合物複合材料中溶劑會自然揮發，固化後 之碳奈米管/聚合物複合材料於鏡頭座150之外表面154形 成電磁屏蔽層30。 本實施例中，將矽樹脂溶解於丙酮溶劑中形成矽樹脂/ 丙酮混合溶液，再利用超聲波分散直接將單壁碳奈米管分 散到矽樹脂/丙酮混合溶液中形成單壁碳奈米管/矽樹脂複 合物材料。然後，利用喷塗方法於鏡頭座150之外表面154 塗佈該碳奈米管/聚合物複合材料，形成厚度範圍於1-100 微米之塗層，並用紫外光照射該塗層使其固化。於該固化 9 200841066 L牙中反不、米官/聚合物複合材料中溶劑丙g同會自然揮 從而形成麵管/聚合物複合材料層為電磁屏：層 當然’亦可於鏡頭座150之内表面154塗佈碳夯 聚合物複合材料形成電磁屏蔽層，或同時於鏡頭座丁15、/之 :表面154與外表面155塗佈碳奈米管/聚合物 成電磁屏蔽層，或者於户^ 材科幵/, the image sensor component of the camera and the lens board. The lens module usually includes a pound-shaped frame, a lens barrel disposed on the lens holder, and a lens group, a spacer ring and a filter which are fixed in the same direction along the optical axis. Optical components. The image sensor component is usually packaged in the lens holder, and is packaged at the bottom of the (4) cylinder for use with the mirror group for imaging. However, the lens holder and the lens barrel of the conventional lens module are made of plastic such as PC/ABS (?? propylene/acrylonitrile-butadiene styrene), I-pass plastic, polytetracycline, etc. Usually, it does not have good anti-electromagnetic interference capability, and the image sensor component is easily disturbed by external electromagnetic waves, resulting in a failure to obtain a clear image, resulting in poor image quality. Especially when the imaging resolution is high, the influence of external electromagnetic waves on the amount of image sensor components is more obvious. [Brief Description of the Invention] In view of the above, it is necessary to provide a lens core group having good resistance to electromagnetic interference to effectively improve the image quality of the south. A lens module will be described below by way of example. 6 200841066 ^ The lens module includes a lens holder and a mirror-cylinder fixed to the lens holder. A filter, a spacer ring, and a lens group are sequentially accommodated in the lens barrel in the optical axis direction. The outer surface of the lens holder has an electromagnetic shielding layer which is a carbon nanotube/polymer composite comprising a polymer matrix and a carbon nanotube dispersed in the polymer matrix. Compared with the prior art, the lens module is provided with an electromagnetic shielding layer on the outer surface of the lens holder. The electromagnetic shielding layer is formed of a carbon nanotube/polymer composite material, and has good anti-electromagnetic interference capability, and can effectively shield external electricity. • Magnetic waves greatly reduce the interference of electromagnetic waves on the image sensor components that match the lens module, thereby improving image quality. [Embodiment] The lens module provided in the embodiment of the present technical solution will be further described below. Referring to FIG. 1 and FIG. 2 , the lens module 10 of the embodiment includes a lens barrel 110 , a filter 120 , a spacer ring 130 , a lens group 140 , and a lens holder 150 . ® The lens barrel 110 is a cylindrical body for accommodating the filter 120, the spacer ring 130, and the lens group 140. The barrel 110 includes a first end 111 and an opposite second end 112. The first end portion 111 is provided with a light entrance hole 113 through which the light enters the lens module 10 and passes through the filter 120 and the lens module 140 in sequence. The outer wall of the second end portion 112 may be provided with a thread for cooperating with the thread provided by the lens mount 150 such that the lens barrel 110 can be fixed to the lens mount 150. Of course, the lens barrel 110 can also be fixed to the lens holder 150 by other means. 200841066 • The filter ▲ 120, the spacer ring 130, and the lens group 140 are sequentially fixed in the lens barrel 110 in the optical axis direction from the first end portion 111 to the second end portion 112 of the lens barrel 110. The lens mount 150 has a receiving hole 151 for receiving the fixed lens barrel 110 and the image sensor element 20. The lens mount 150 has a first base end 152 and an opposite second base end 153. The inner wall of the first base end 152 is provided with a thread which cooperates with the thread of the outer wall of the second end portion 112 of the lens barrel 110 for fixing the lens barrel 110 to the lens holder 150. The second base end 153 can be used to connect to other components or devices. In this embodiment, the second base end 153 is fixed on the circuit board 22 on which the image sensor component 20 is mounted, so that the image sensor component 20 is disposed on the second base end 153. The image sensor component 20 enters the lens module 10 through the light entrance hole 113, and sequentially converts the optical signals of the filter film 120 and the lens module 140 into electrical signals to form an image. The image sensor element 20 can be a Charge Coupled Device (CCD) or a Complementary Metal Oxide Semiconductor (CMOS). In addition, the lens mount 150 has an outer surface 154 and an inner surface 155. The outer surface 154 has an electromagnetic shielding layer 30 for shielding external electromagnetic waves from interference with the image sensor element 20, thereby improving image quality. The electromagnetic shielding layer 30 has a thickness ranging from 1 to 100 microns. Of course, the thickness of the electromagnetic shielding layer 30 can also be designed according to actual needs. The material of the electromagnetic shielding layer 30 is a carbon nanotube/polymer composite. The carbon nanotube/polymer composite comprises a polymer matrix and a carbon nanotube that disperses 200841066 A in the polymer matrix. The polymer matrix may be a thermoplastic tree such as an acrylic resin, a thermosetting resin such as an epoxy resin, or an ultraviolet curable resin such as an anthraquinone resin. The carbon nanotubes can be single-walled carbon nanotubes or multi-walled carbon nanotubes. The method of forming the electromagnetic shielding layer 30 on the outer surface 154 of the lens holder 150 is as follows: First, a carbon nanotube/polymer composite material in a liquid state is produced by direct dispersion mixing. The specific method is: dissolving the polymer matrix in a solvent such as water, acetone, ethanol, isooctane or hydrazine to form a mixed solution; using _ ultrasonic waves to directly disperse the carbon nanotubes into a mixture of the polymer matrix dissolved in the solvent. In solution, a liquid carbon nanotube/polymer composite is formed. Next, a liquid carbon nanotube/polymer composite is applied to the outer surface 154 of the lens mount 150 to form an electromagnetic shielding layer 30. The specific method is as follows: the liquid carbon nanotube/polymer composite is applied to the outer surface 154 of the lens holder 150 by brushing, dip coating or spraying; the carbon nanotube/polymer composite is naturally Curing, heat curing or UV curing, during the curing process, the solvent in the liquid carbon nanotube/polymer composite will naturally volatilize, and the cured carbon nanotube/polymer composite is on the outer surface of the lens holder 150. An electromagnetic shielding layer 30 is formed. In this embodiment, the ruthenium resin is dissolved in an acetone solvent to form a ruthenium resin/acetone mixed solution, and the single-walled carbon nanotubes are directly dispersed into the ruthenium resin/acetone mixed solution by ultrasonic dispersion to form a single-walled carbon nanotube. Tantalum resin composite material. Then, the carbon nanotube/polymer composite is applied to the outer surface 154 of the lens holder 150 by a spraying method to form a coating having a thickness ranging from 1 to 100 μm, and the coating is cured by ultraviolet light. In the curing 9 200841066 L tooth, the solvent C in the rice/polymer composite will naturally wave to form the surface tube/polymer composite layer as an electromagnetic screen: the layer of course can also be used in the lens holder 150 The inner surface 154 is coated with a carbonium polymer composite to form an electromagnetic shielding layer, or at the same time, the lens holder 15 or the surface 154 and the outer surface 155 are coated with a carbon nanotube/polymer to form an electromagnetic shielding layer, or ^ Material Science /
聚合物複合材料形成電:屏蔽層，以進:面步==/ =之屏蔽效果，減少外界電磁波對影像 之干擾，攸而提升成像質量。 利申本發明符合發明專利要件’爰依法提出專 發明以上所述者僅為本發明之較佳實施方式，本 "圍亚不以上述實施方式為限，舉凡孰朵 =士，在援依本案發日㈣神所作之等飾匕技; 應包含於以下之申請專利範圍内。 〜化’皆 【圖式簡單說明】 圖。圖1係本技術方时_提供之鏡鄕組之立體示意 圖2係本技術方案實施例提供 【主要元件符號說明】 之鏡頭模組之剖視The polymer composite material forms an electric: shielding layer, and the shielding effect of the surface step ==/= reduces the interference of external electromagnetic waves on the image, thereby improving the image quality. Lishen This invention complies with the invention patent requirements '爰Special inventions according to law. The above is only the preferred embodiment of the present invention. This is not limited to the above-mentioned implementation methods, and is not limited to the above-mentioned implementation methods. The day of the case (4) God's decoration techniques; should be included in the scope of the following patent application. ~化' are all [simplified description of the diagram] Figure. 1 is a perspective view of a mirror set provided by the present technology. FIG. 2 is a cross-sectional view of a lens module provided by an embodiment of the present technical solution.
鏡頭模組 第一端部 入光孔 間隔環 10 鏡筒 111 第二端部 113 濾光片 130 透鏡組 110 112 120 140 200841066 鏡頭座 150 容置子L 151 第一基座端 152 第二基座端 153 外表面 154 内表面 155 影像感測器元件 20 電路板 22 電磁屏蔽層 30 11Lens module first end entrance aperture spacer ring 10 lens barrel 111 second end 113 filter 130 lens group 110 112 120 140 200841066 lens holder 150 housing L 151 first base end 152 second base End 153 Outer Surface 154 Inner Surface 155 Image Sensor Element 20 Circuit Board 22 Electromagnetic Shield 30 11