594174 五、發明說明（1) 發明所屬之技術領域 本發明係提供一種液晶顯示面板（Hqu id crystal ^splay panel，LCD panel)，尤指一種可防止電磁干擾 Celeeti^inagnetic interference，EMI)的液晶顯示面 板0 先前技術 印刷電路板（printed circuit board, PCB)係為各 種電子資訊產品不可或缺之基礎零件，就其使用基材而 言可區分為硬式及軟性印刷電路（f lexibu printed circuit， FPC)板。其中硬式印刷電路板大多應用於電腦 主機板、週邊卡、通訊產品，如手機板，以及消費性產 品的卡板為主，而軟性印刷電路板則由於具有重量輕、 材質軟且薄、體積小、可撓性、高密度配線可減少配線 錯誤、可三度立體配線、可依空間限制改變形狀等特 性’因此大多應用於輕薄短小的產品中。 一般而言，軟性印刷電路板的功能約可區分為四 種’刀別為引線路（lead line)、印刷電路、連接器 (connector)及多功能整合系統（integrati〇ri ^ function)，而軟性印刷電路板可分為單層板、 多層板結構。其中單層板是由導板層塗上一層金屬接著 594174 五、發明說明（2) 再加上一層介電板所組成，其價格最低廉、製程最簡 單，適用於超扭轉向列型液晶顯示器（STN-LCD)、軟碟 (FDD)或硬碟（HDD)與主機板連接用，以及通訊產品（如手 機及PDA)之連接板等；而雙層板的底層兩面皆有複數個 銅箔導體，且經鍍通孔製程，總厚度較厚，柔軟度較 低’適用於筆記型電腦之液晶顯示面板與主機板之連接 板、薄膜電晶體液晶顯示器（TFT-LCD)，以及通訊產品 (如手機）之連接板等；又多層板是由多個單面板或雙面 板壓合所成，可靠度較高，但可撓度較差，應用範圍較 小，適用於高階筆記型電腦之零組件與主機板之連接 板0 請參考圖一，圖一為習知液晶顯示面板1 〇之結構示 意圖。如圖一所示，習知的液晶顯示面板1 〇是設置於一 液晶顯示器中（未顯示於圖一中），且液晶顯示面板1 〇主 要包含有一玻璃基板12，其包含有一顯示區與一週邊電 路區（皆未顯示於圖一中），一軟性印刷電路板1 4設於玻 璃基板12之週邊電路區的邊緣，以及一外框16，用來放 置玻璃基板1 2。此外’液晶顯不面板1 0另包含有複數個 驅動器積體電路（integrated circuit， 1C)，用以控制 液晶顯不面板1 0之輸出。 接著請參考圖二，圖二為圖一之軟性印刷電路板1 4 之剖面示意圖。如圖二所示，習知的軟性印刷電路板1 4594174 V. Description of the invention (1) Technical field to which the invention belongs The present invention provides a liquid crystal display panel (Hqu id crystal ^ splay panel, LCD panel), especially a liquid crystal display capable of preventing electromagnetic interference (Celeeti ^ inagnetic interference, EMI) Panel 0 The printed circuit board (PCB) of the prior art is an indispensable basic part of various electronic information products. As far as its substrate is concerned, it can be divided into hard and flexible printed circuits (FPC). board. Among them, rigid printed circuit boards are mostly used in computer motherboards, peripheral cards, communication products such as mobile phone boards, and consumer product card boards, while flexible printed circuit boards are lightweight, soft and thin, and small in size. Flexible, high-density wiring can reduce wiring errors, three-dimensional three-dimensional wiring, and can change the shape according to space constraints, so it is mostly used in light, thin and short products. Generally speaking, the functions of flexible printed circuit boards can be divided into about four types: lead lines, printed circuits, connectors, and integratiori functions. Printed circuit boards can be divided into single-layer boards and multilayer board structures. The single-layer board is composed of a guide plate coated with a layer of metal and then 594174. 5. Description of the invention (2) and a layer of dielectric plate, which has the lowest price and the simplest process, and is suitable for super twisted nematic liquid crystal displays. (STN-LCD), floppy disk (FDD) or hard disk (HDD) for connection with the motherboard, and connection boards for communication products (such as mobile phones and PDAs); and the bottom and double sides of the double-layer board have multiple copper foils Conductor with plated through-hole process, thicker total thickness and lower softness. 'Applicable to the connection board of LCD panel and motherboard of notebook computer, thin film transistor liquid crystal display (TFT-LCD), and communication products ( (Such as mobile phones) connection boards; and multi-layer boards are formed by laminating multiple single- or double-sided boards, with high reliability, but poor flexibility, and small application range, suitable for components and high-end notebook computers and Please refer to FIG. 1 for the connection board of the motherboard. FIG. 1 is a schematic structural diagram of a conventional liquid crystal display panel 10. As shown in FIG. 1, the conventional liquid crystal display panel 10 is set in a liquid crystal display (not shown in FIG. 1), and the liquid crystal display panel 10 mainly includes a glass substrate 12 including a display area and a In the peripheral circuit area (none of which is shown in FIG. 1), a flexible printed circuit board 14 is disposed on the edge of the peripheral circuit area of the glass substrate 12, and an outer frame 16 is used to place the glass substrate 12. In addition, the LCD panel 10 also includes a plurality of driver integrated circuits (1C) for controlling the output of the LCD panel 10. Please refer to FIG. 2, which is a schematic cross-sectional view of the flexible printed circuit board 14 of FIG. 1. As shown in Figure 2, the conventional flexible printed circuit board 1 4
594174 五、發明說明（3) 主要包含有複數條銅金屬導線1 8、一接地金屬導線2 0、 一絕緣膠黏劑（insulating adhesive)2 2設於相鄰兩銅金 屬導線1 8與接地金屬導線2 0之間，以及二絕緣材料層 24 ’例如聚醯亞胺（poly imide)材料，包覆於銅金屬導線 1 8與接地金屬導線2 〇之外。其中，軟性印刷電路板丨4是 用來當作一連接器，以連接液晶顯示面板丨〇與其他電子 元件’例如液晶顯示器的主機板（皆未顯示於圖二中）， 當使用者輸入一控制訊號至主機板時，主機板會經由軟 性印刷電路板1 4内的銅金屬導線1 8傳輸該控制訊號至液 晶顯示面板1 〇的驅動器丨（；來驅動該驅動器I C，使得液晶 顯示面板1 0得以顯示資訊。 當液晶顯示面板1 〇的尺寸隨著市場的需求越做越大 時，液晶顯示面板1 〇的解析度也會相對地提高，然而由 於解析度的提高會導致訊號傳送的頻率變快，當頻率太 快時’軟性印刷電路板1 4就容易與液晶顯示器中的其他 電子元件產生電磁干擾（electromagnetic interference， EMI)。一般而言，一台筆記型電腦約需 使用4至6片軟性印刷電路板、手機按鍵約有4〇%使用軟性 印刷電路板，而1台電漿電視（PDP)約需使用14片軟性印 刷電路板，因此所產生的電磁干擾會加倍的嚴重，使得 電子產品無法正常操作。 發明内容594174 V. Description of the invention (3) It mainly includes a plurality of copper metal wires 18, a ground metal wire 20, an insulating adhesive 2 2 provided on two adjacent copper metal wires 18 and a ground metal Between the conductive wires 20 and two insulating material layers 24 ′, such as polyimide material, the copper metal wires 18 and the ground metal wires 20 are covered. Among them, the flexible printed circuit board 4 is used as a connector to connect the liquid crystal display panel 丨 〇 and other electronic components such as the motherboard of the liquid crystal display (both are not shown in Figure 2). When the user enters a When the control signal is transmitted to the motherboard, the motherboard transmits the control signal to the driver of the liquid crystal display panel 10 through the copper metal wire 18 in the flexible printed circuit board 14 to drive the driver IC, so that the liquid crystal display panel 1 The information can be displayed at 0. When the size of the liquid crystal display panel 10 is larger and larger as the market demands, the resolution of the liquid crystal display panel 10 will also be relatively increased, but the increase in resolution will cause the frequency of signal transmission. Faster, when the frequency is too fast, the flexible printed circuit board 14 is easy to generate electromagnetic interference (EMI) with other electronic components in the liquid crystal display. Generally speaking, a notebook computer needs about 4 to 6 About 40% of flexible printed circuit boards and mobile phone keys use flexible printed circuit boards, while a plasma TV (PDP) requires about 14 pieces of flexible The printed circuit board, therefore, the electromagnetic interference generated will be doubled, making electronic products unable to operate normally.
第8頁 594174 五、發明說明（4) 一·1 因此本發明的目的在於提供一種液晶顯示面板，可 避免因液晶顯示面板的尺寸增大所產生的電磁干擾的 象。 為達到上述目的’在本發明之較佳實施例中提出_ 種可防止電磁干擾之液晶顯示面板。該液晶顯示面板包 含有一基板，以及一軟性印刷電路板設於該基板之邊^ 上。且該軟性印刷電路板包含有複數條金屬導線、一接 地金屬導線、一第一絕緣材料層包覆於該等金屬導線之 外與該接地金屬導線之兩側、二導電薄膜分別設於該第 一絕緣材料層與該接地金屬導線之上表面與下表面，以 及一第二絕緣材料層包覆於該二金屬薄膜外。 由於本發明之液晶顯示面板内用來當作連接器的軟 性印刷電路板設有二導電薄膜，因此可用來遮蔽設於軟 性=刷電路板内的金屬導線，以避免金屬導線與液晶顯 不器中其他的電子元件產生電磁干擾的現象。此外，本 發明亦將二導電薄膜與設於軟性印刷電路板内的接地金 屬導線電連接，使得軟性印刷電路板之内部所產生的電 磁干擾可以藉由接地金屬導線導到外界，以達到雙重防 護電磁干擾之效果。 實施方式 594174 五、發明說明（5) 本發明之最佳實施例係以一液晶顯示面板為例 明’然而本發明中所揭露的技術也可用於其它各種需要 利用軟性印刷電路板’且須避免電磁干擾現象的電|產 品中，例如非晶石夕（amorphous si 1^〇11)薄膜電晶體液晶 顯示（thin film transistor LCD， TFT-LCD)器、通訊產 品，或資訊家電（information appiicati〇n， iA)產品 中。 。口 ❿ 請參考圖三，圖三為本發明之液晶顯示面板3 〇之結 構示意圖。如圖三所示，在本發明之最佳實施例中，液 晶顯示面板30是設置於一液晶顯示器中（未顯示於圖三 中），且液晶顯示面板30主要包含有一玻璃基板32，其包 含有一顯示區與一週邊電路區（皆未顯示於圖三中），一 軟性印刷電路板3 4設於玻璃基板3 2之週邊電路區的邊緣 上，以及一金屬外框3 6，用來放置玻璃基板3 2。此外， 液晶顯示面板3 2另包含有複數個驅動器I C設於液晶顯示 面板3 2之週邊電路區上，用以控制液晶顯示面板3 2之輸 出。值得注意的是，金屬外框另設有一接地線3 8，用來 接地以導出液晶顯示面板3 2的靜電，避免靜電影響液晶 顯示面板3 2的正常顯示，此外，也可將金屬外框3 6的設 計更改為一金屬上外框與一塑膠下外框（皆未顯示於圖三 中），以降低液晶顯示面板3 2的重量。Page 8 594174 V. Description of the invention (4) I · 1 Therefore, an object of the present invention is to provide a liquid crystal display panel, which can avoid the phenomenon of electromagnetic interference caused by an increase in the size of the liquid crystal display panel. In order to achieve the foregoing object, a liquid crystal display panel capable of preventing electromagnetic interference is proposed in a preferred embodiment of the present invention. The liquid crystal display panel includes a substrate, and a flexible printed circuit board is disposed on an edge of the substrate. In addition, the flexible printed circuit board includes a plurality of metal wires, a ground metal wire, a first insulating material layer covering the metal wires, two sides of the ground metal wire, and two conductive films respectively disposed on the first An insulating material layer and the upper and lower surfaces of the ground metal wire, and a second insulating material layer covers the two metal films. Since the flexible printed circuit board used as a connector in the liquid crystal display panel of the present invention is provided with two conductive films, it can be used to shield the metal wires provided in the flexible circuit board to avoid the metal wires and the liquid crystal display. The phenomenon of electromagnetic interference caused by other electronic components. In addition, the present invention also electrically connects the two conductive films with a grounded metal wire provided in the flexible printed circuit board, so that the electromagnetic interference generated inside the flexible printed circuit board can be conducted to the outside through the grounded metal wire to achieve double protection. Effect of electromagnetic interference. Embodiment 594174 V. Description of the invention (5) The preferred embodiment of the present invention is described by taking a liquid crystal display panel as an example. 'However, the technology disclosed in the present invention can also be used for various other needs to use flexible printed circuit boards' and must be avoided. Electromagnetic interference phenomenon | In products, such as amorphous si 1 ^ 〇11 thin film transistor LCD (TFT-LCD) devices, communication products, or information appliances (information appiicati〇n , IA) products. .口 Please refer to FIG. 3, which is a schematic diagram of the structure of the liquid crystal display panel 30 of the present invention. As shown in FIG. 3, in the preferred embodiment of the present invention, the liquid crystal display panel 30 is disposed in a liquid crystal display (not shown in FIG. 3), and the liquid crystal display panel 30 mainly includes a glass substrate 32, which includes There is a display area and a peripheral circuit area (both are not shown in FIG. 3), a flexible printed circuit board 34 is disposed on the edge of the peripheral circuit area of the glass substrate 32, and a metal frame 36 is used for placing Glass substrate 3 2. In addition, the liquid crystal display panel 32 further includes a plurality of drivers IC disposed on the peripheral circuit area of the liquid crystal display panel 32 to control the output of the liquid crystal display panel 32. It is worth noting that the metal frame is also provided with a ground wire 38 for grounding to discharge the static electricity of the liquid crystal display panel 32 to prevent static electricity from affecting the normal display of the liquid crystal display panel 32. In addition, the metal frame 3 can also be The design of 6 is changed to a metal upper frame and a plastic lower frame (both are not shown in Figure 3) to reduce the weight of the LCD panel 32.
第10頁 594174 五、發明說明（6) 接著請參考圖四，圖四為圖三之軟性印刷電路板34 沿線I I - I Γ之剖面示意圖。如圖四所示，本發明之軟性 印刷電路板3 4主要包含有複數條金屬導線4 0、一接地金 屬導線4 2、一絕緣膠黏劑4 4設於複數條金屬導線4 0與接 地金屬導線42之間、一絕緣材料層46包覆於金屬導線40 之外接地金屬導線4 2之兩側、二導電薄膜4 8分別設於絕 緣材料層4 6與接地金屬導線4 2之上表面與下表面，以及 一絕緣材料層5 0包覆於二金屬薄膜4 8外。其中，二導電 薄膜4 8主要是用來遮蔽軟性印刷電路板3 4内的金屬導線 4 0與液晶顯示器内其他電子元件所產生的電磁干擾，且 二導電薄膜4 8會與接地金屬導線4 2電連接，使得軟性印 刷電路板34内部所產生的電磁干擾或靜電，可以藉由接 地金屬導線4 2導至系統地，以排放至外界，達到防治電 磁干擾軟性印刷電路板3 4、液晶顯示面板3 〇或其他電子 元件的目的。一般而言，軟性印刷電路板34亦可為一可 撓式印刷電路板、一軟性銅箔基板或一柔性線路板（tape carrier package, TCP),金屬導線4〇可由銅金屬所構 成，二導電薄膜48可為任何具有屏蔽效應且可導電之薄 膜，例如為金屬薄膜，而絕緣材料層4 6與5 〇可由聚醯亞 胺（ρ ο 1 y i m i d e )材料所構成。 請參考圖五，圖五為本發明之另一種軟性印刷電路 板6 0之剖面示意圖。如圖五所示，軟性印刷電路板6 〇主 要包含有複數條金屬導線6 2、一接地金屬導線6 4、一絕Page 10 594174 V. Description of the invention (6) Please refer to FIG. 4. FIG. 4 is a schematic cross-sectional view of the flexible printed circuit board 34 along line I I-I Γ in FIG. As shown in FIG. 4, the flexible printed circuit board 34 of the present invention mainly includes a plurality of metal wires 40, a grounded metal wire 4 2, and an insulating adhesive 4 4 disposed on the plurality of metal wires 40 and a grounded metal. Between the conductors 42, an insulating material layer 46 covers the metal conductors 40 on both sides of the ground metal conductor 4 2, and two conductive films 4 8 are respectively provided on the upper surface of the insulating material layer 46 and the ground metal conductor 4 2 and The lower surface and an insulating material layer 50 cover the two metal films 48. Among them, the second conductive film 4 8 is mainly used to shield electromagnetic interference generated by the metal wires 40 in the flexible printed circuit board 34 and other electronic components in the liquid crystal display, and the second conductive film 48 and the ground metal wire 4 2 Electrical connection, so that the electromagnetic interference or static electricity generated inside the flexible printed circuit board 34 can be conducted to the system ground through a grounded metal wire 4 2 to be discharged to the outside world to prevent electromagnetic interference from the flexible printed circuit board 3 4. Liquid crystal display panel 3 0 or other electronic components. Generally speaking, the flexible printed circuit board 34 can also be a flexible printed circuit board, a flexible copper foil substrate, or a flexible carrier board (TCP). The metal wire 40 can be made of copper metal, and is conductive. The film 48 may be any film that has a shielding effect and is conductive, such as a metal film, and the insulating material layers 46 and 50 may be made of polyimide (ρ ο 1 yimide) material. Please refer to FIG. 5, which is a schematic cross-sectional view of another flexible printed circuit board 60 of the present invention. As shown in Figure 5, the flexible printed circuit board 6 〇 mainly includes a plurality of metal wires 6 2, a grounded metal wire 6 4, a
594174 間、 6 4外 緣材 來遮 導線 地金 得軟 地金 影響 五、發明說明 緣膠黏劑 一絕 、 —— 料層 蔽軟 6 2與 屬導 性印 屬導 軟性 (7) 6 6設於複 緣材料層 導電薄膜 72包覆於 性印刷電 其他電子 線64連接 刷電路板 線6 4導至 印刷電路 數條金屬 6 8包覆於 70包覆於 導電薄膜 路板60内 元件產生 於導電薄 6 0内部所 系統地而 板6 0與液 導線62與 金屬導線 絕緣材料 7 0外。因 之金屬導 電磁干擾 膜7 0且與 產生的電 導至外界 晶顯示面 接地金 62與接 層6 8外 此導電 線62， 的現象 系統地 磁干擾 ，以避 板的正 屬導線64之 地金屬導線 ，以及 絕 薄膜7 0可用 以避免金屬 ，此外，接 相聯接，使 可以經由接 免電磁干擾 常操作。 相 示面板 含一導 此可達 傳輸頻 擾，因 大，而 軟性印 些微的 金屬導 干擾的 較於習知液晶顯示 與其他電子元件的 電薄膜，設於金屬 到靜電屏蔽的作用 率太快，而與其他 此本發明之液晶顯 產生電磁干擾現象 刷電路板與其他電 電磁干擾，也可以 線，將電磁干擾導 效果。 面板， 連接器 導線與 ’並避 的電子 示面板 ’也不 子元件 藉由與 至外界 本發 之軟 接地 免因 元件 不會 會影 的正 導電 ，以 明用 性印 金屬 軟性 所產 隨著 響液 常操 薄膜 達到 來當作 刷電路 導線之 印刷電 生的電 面板尺 晶顯示 作。即 電連接 雙重防 液晶顯 板另包 外，因 路板的 磁干 寸的增 器内之 使產生 的接地 護電磁 以上所述僅為本發明之較佳實施例，凡依本發明申594174, 6 4 The outer edge material is used to cover the wire ground to obtain the soft ground gold. V. The description of the edge adhesive is a must. —— The material is covered with a soft layer 6 2 and it is conductive. (7) 6 6 The conductive film 72 is provided on the compound material layer, and is coated with printed electrical and other electronic wires. 64 is connected to the printed circuit board. 6 4 leads to the printed circuit. 6 8 is coated with 70 and is coated with conductive film. The conductive sheet 60 is systematically ground inside the board 60 and the liquid wire 62 and the metal wire insulating material 70. Therefore, the phenomenon of metallic conductive magnetic interference film 70 and the conductivity to the outside of the crystal display surface is grounded with gold 62 and the conductive layer 62 outside the conductive wire 62, and the phenomenon of systematic magnetic interference is avoided to avoid the ground metal of the board being the wire 64. Wires and insulation film 70 can be used to avoid metal. In addition, the connection is connected, so that it can be operated normally without electromagnetic interference. The phase display panel contains a channel that can reach the transmission frequency interference. Because of the large, soft printed metal interference, it is faster than the conventional thin film of liquid crystal displays and other electronic components. The effect of the metal on the electrostatic shielding is too fast. In addition, when the liquid crystal display of the present invention generates electromagnetic interference, the circuit board can be brushed with other electrical electromagnetic interference, or it can be wired to guide the electromagnetic interference. Panels, connector wires, and 'avoided electronic display panels' are not subcomponents. By virtue of the soft grounding to the outside world, the components do not affect the positive conductivity, which is produced by soft printed metal. Loudspeakers often operate the thin film to display the electric scale of the printed circuit board, which is used to brush the circuit wires. That is to say, the electrical connection is not included in the dual anti-liquid crystal display board. The ground due to the magnetic dryness of the circuit board is protected by the ground. The above is only a preferred embodiment of the present invention.
594174 五、發明說明（8) 請專利範圍所做之均等變化與修飾，皆應屬本發明專利 之涵蓋範圍。594174 V. Description of the invention (8) All equal changes and modifications made to the scope of the patent shall be covered by the patent of the invention.
1BB 第13頁 594174 圖式簡單說明 圖式之簡單說明 圖一為習知液晶顯示面板之結構示意圖。 圖二為圖一之軟性印刷電路板沿線I - Γ之剖面示意 圖 意圖 圖三為本發明液晶顯示面板之結構示意圖。 圖四為圖三之軟性印刷電路板沿線I I - I Γ之剖面示 〇 圖五為本發明另一種軟性印刷電路板之剖面示意 圖 圖式之符號說明1BB Page 13 594174 Brief description of the drawings Brief description of the drawings Figure 1 is a schematic diagram of the structure of a conventional liquid crystal display panel. Fig. 2 is a schematic cross-sectional view of the flexible printed circuit board along line I-Γ in Fig. 1. Fig. 3 is a schematic structural diagram of a liquid crystal display panel of the present invention. Figure 4 is a cross-sectional view of the flexible printed circuit board along the line I I-I Γ in Figure 3. Figure 5 is a schematic cross-sectional view of another flexible printed circuit board of the present invention.
10 液 晶 顯 示 面 板 12 玻 璃 基 板 14 軟 性 印 刷 電 路 板 16 外 框 18 金 屬 導 線 20 接 地 金 屬 導 線 22 絕 緣 膠 黏 劑 24 絕 緣 材 料 層 30 液 晶 顯 示 面 板 32 玻 璃 基 板 34 軟 性 印 刷 電 路 板 36 金 屬 外 框 38 接 地 線 40 金 屬 導 線 42 接 地 金 屬 導 線 44 絕 緣 膠 黏 劑 46 絕 緣 材 料 層 48 導 電 薄 膜 50 絕 緣 材 料 層 60 軟 性 印 刷 電 路板 62 金 屬 導 線 64 接 地 金 屬 導 線 第14頁 594174 圖式簡單說明 68 絕緣材料層 7 2 絕緣材料層 66 絕緣膠黏劑 70 導電薄膜 第15頁10 Liquid crystal display panel 12 Glass substrate 14 Flexible printed circuit board 16 Outer frame 18 Metal wire 20 Ground metal wire 22 Insulating adhesive 24 Insulating material layer 30 Liquid crystal display panel 32 Glass substrate 34 Flexible printed circuit board 36 Metal frame 38 Ground wire 40 Metal wire 42 Ground metal wire 44 Insulating adhesive 46 Insulating material layer 48 Conductive film 50 Insulating material layer 60 Flexible printed circuit board 62 Metal wire 64 Grounding metal wire Page 14 594174 Simple illustration 68 Insulating material layer 7 2 Insulation Material layer 66 Insulating adhesive 70 Conductive film 第 15 页