1330585 九、發明說明： 【發明所屬之技術領域】 本發明是有關於一種背光模組，且特別是有關於一種 背光模組的外框。 【先前技術】 液晶顯示器（liquid crystal display; LCD)具有重量輕、 低耗電、可視面積大、零輻射及畫質精細等優點，因此在 • 短短數十年間，已被廣泛地應用在通信、資訊及家居生活 領域中’如行動電話、無線電話、傳真機、工業用儀表、 機械及影音家電等。然而’由於液晶本身不發光，因此一 般液晶顯示器大多需安裝背光模組，以提供顯示所需的亮 度。 在一般背光模組（特別是側光式背光模組）中，為了有效 利用光源有限的光線，製造者大多會安裝燈反射罩來將光 源所發出的光線反射入導光板。然而，這種燈反射罩往往 • 所費不貲，因此如何以一種更低廉的元件來取代原本價昂 的燈反射罩，已經成為一個需要面對的課題。 【發明内容】 因此本發明一方面就是在提供一種背光模組的製造方 法，其將反射片以模内貼合射出成型的方式（例如：模内裝 飾（In-mold Decoration)或模内貼標（In_m〇ld Labeling))附著 於外框上，以取代原本價昂的燈反射罩。 (S ) 5 根據本發明一實施例，一種背光模組的製造方法包含 下列步驟： (1) 形成反射片。 (2) 將此反射片附著於模穴的表面。 (3) 將塑料射入上述模穴中。 根據本發明另一實施例，一種背光模組的製造方法包 含下列步驟： (a) 形成反射片。 (b) 將此反射片附著於第一半模具的内側。 (c) 結合第一半模具與第二半模具，以形成模穴。 (d) 將塑料射入上述模穴中。 【實施方式】 雖然在側光式背光模組中，製造者可在外框内側黏貼 反射片來取代原本價昂的燈反射罩，但是這種作法一旦反 射片與外框間的黏膠黏度不足，就會使得反射片產生部分 脫落的現象。這種反射片脫落的現象將造成漏光與輝度下 降等等問豸，使得顯示器的顯示品質日益低落。 因此在部分直下式背光模組中’製造者會將高反射塑 料直接射出於黑色的外框上，以解決黏膠失效的問題。然 而，由於這類高反射塑料相較於現有的反射片，不但反射 率遠遠不及，而且還有黃化與劣化等問題，因此不適用於 側光式背光模組。 有鑑於此，本發明下述實施例將提供一種背光模組的 製=方法，其反射片係以模内貼標（In-mold labeling)的方式 著於外框上’以徹底解決黏度不足所造成的問題。 法。第1-3圖繪示依照本發明一實施例之背光模組的製造 面圖。如第1-3圖所示’一種背光模組的製造方法 包含下列步驟： (1) 形成反射片110。（如第丨圖所繪示） (2) 將此反射片110附著於模穴η〇的表面。（如第2 圖所繪示） (3)將塑料130射入上述模穴12〇中。（如第3圖所汾 示） 曰 在上述步驟（1)中，反射片110可以任意人為加工方 式，例如熱真空成型或加熱折彎的方式，形成所需的形狀 (例如.L型或门型）。具體而言，上述反射片11〇的反射率 可較塑料130的反射率高，而反射片11〇的材質則可為發 泡聚碳酸醋（P〇lycarbonate ; PC)、芳族聚酯（Aromatic polyester)、聚對苯二曱酸乙二酯（p〇lyethyiene terephthalate ; PET)、脂肪族聚醋（Aliphatic p〇lyester)、聚 甲基丙烯酸曱酯（p〇lymethyi methacryiate ; PMMA)、聚乙 烯（Polyethylene ; PE)、塑膠、高分子聚合物或金屬β 在步驟（2)中，上述之反射片no可以手置、真空或靜 電吸附的方式’附著於模穴丨2〇的表面。更具體地說，上 述之模穴120可由第一半模具122與第二半模具124結合 而成，而上述之反射片110則附著於第一半模具122的内 側。 1330585 無溶劑型接著劑，例如瞬間接著劑（Cyanoacrylate Adhesives)、環氧樹脂接著劑（Ep0xy Resin)、熱熔膠接著劑 (Hot Melt Adhesives)、感壓性接著劑（Pressure-sensitive adhesive ； PSA)等等。 此外’在本實施例中，由於反射片i 10比外框更早形 成’因此製造者可在形成反射片後，先在反射片11〇 的表面塗佈抗紫外光劑，然後才射入塑料丨3 〇，以提供更好 的抗紫外光效果。應瞭解到，雖然本實施例將抗紫外光劑 塗佈於反射片11 〇的表面，但此並不限制本發明，習知此 項技藝者應視當時需要彈性選擇其實施方式。舉例來說， 對於某些廉價機種而言，製造者亦可選擇不塗佈抗紫外光 劑，或者將抗紫外光劑直接混合於反射片中。 片與塑料，以避免反射片的反射率受到影響。 圖具體說明如何實施上述内容。 在某些情況下，步驟（3)的製程條件（例如：溫度）可能 會影響反射片的結構，並進而減少反射片的反射率。因此， 在本發明另一實施例中，製造者可選擇僅結合部分之反射 。以下將以第4 第4圖繪示依照本發明另—實施例之模穴 120與反射1330585 IX. Description of the Invention: [Technical Field] The present invention relates to a backlight module, and more particularly to an outer frame of a backlight module. [Prior Art] Liquid crystal display (LCD) has the advantages of light weight, low power consumption, large visible area, zero radiation and fine image quality. Therefore, it has been widely used in communication in just a few decades. In the field of information and home life, such as mobile phones, wireless phones, fax machines, industrial instruments, machinery and audio-visual appliances. However, since the liquid crystal itself does not emit light, most liquid crystal displays generally require a backlight module to provide the brightness required for display. In a general backlight module (especially an edge-lit backlight module), in order to effectively utilize the limited light of the light source, most of the manufacturers install a lamp reflector to reflect the light from the light source into the light guide plate. However, such a lamp reflector is often expensive, so how to replace the original lamp reflector with a cheaper component has become a problem to be faced. SUMMARY OF THE INVENTION Accordingly, an aspect of the present invention is to provide a method of manufacturing a backlight module in which a reflective sheet is bonded and molded in an in-mold manner (for example, In-mold Decoration or in-mold labeling). (In_m〇ld Labeling)) Attached to the outer frame to replace the original expensive reflector. (S) 5 According to an embodiment of the invention, a method of manufacturing a backlight module includes the following steps: (1) Forming a reflective sheet. (2) Attach this reflection sheet to the surface of the cavity. (3) Inject the plastic into the above cavity. According to another embodiment of the present invention, a method of fabricating a backlight module includes the following steps: (a) Forming a reflective sheet. (b) Attaching the reflection sheet to the inner side of the first mold half. (c) combining the first mold half and the second mold half to form a cavity. (d) Inject the plastic into the above cavity. [Embodiment] Although in the edge-lit backlight module, the manufacturer can adhere the reflective sheet to the inner side of the outer frame instead of the original expensive reflector, this method has insufficient adhesiveness between the reflective sheet and the outer frame. This causes the reflection sheet to partially fall off. The phenomenon that the reflection sheet falls off will cause leakage of light and a decrease in luminance, and the display quality of the display is increasingly lowered. Therefore, in some direct-lit backlight modules, the manufacturer will directly project the highly reflective plastic material onto the black outer frame to solve the problem of adhesive failure. However, since such highly reflective plastics are far less reflective than conventional reflective sheets, and have problems such as yellowing and deterioration, they are not suitable for edge-lit backlight modules. In view of the above, the following embodiments of the present invention provide a method for manufacturing a backlight module, in which the reflective sheet is placed on the outer frame by means of in-mold labeling to completely solve the problem of insufficient viscosity. The problem caused. law. 1-3 are diagrams showing the manufacture of a backlight module in accordance with an embodiment of the present invention. As shown in Figs. 1-3, a method of manufacturing a backlight module includes the following steps: (1) A reflection sheet 110 is formed. (as shown in the figure) (2) The reflection sheet 110 is attached to the surface of the cavity η〇. (as shown in Fig. 2) (3) The plastic 130 is injected into the above-mentioned cavity 12〇. (As shown in Fig. 3) 曰 In the above step (1), the reflection sheet 110 can be formed into a desired shape by an arbitrary processing method such as hot vacuum forming or heating bending (for example, an L-shaped or a door). type). Specifically, the reflectance of the reflective sheet 11〇 may be higher than that of the plastic 130, and the material of the reflective sheet 11〇 may be foamed polycarbonate (PC) or aromatic polyester (Aromatic). Polyester), polyethylene terephthalate (PET), aliphatic p〇lyester, p〇lymethyi methacryiate (PMMA), polyethylene ( Polyethylene; PE), plastic, high molecular polymer or metal β In the step (2), the above-mentioned reflective sheet no can be attached to the surface of the cavity 手 2〇 by hand, vacuum or electrostatic adsorption. More specifically, the above-mentioned cavity 120 may be formed by combining the first mold half 122 and the second mold half 124, and the above-mentioned reflection sheet 110 is attached to the inner side of the first mold half 122. 1330585 Solvent-free adhesives, such as Cyanoacrylate Adhesives, Ep0xy Resin, Hot Melt Adhesives, Pressure-sensitive adhesive (PSA) and many more. Further, in the present embodiment, since the reflection sheet i 10 is formed earlier than the outer frame, the manufacturer can apply the anti-ultraviolet agent to the surface of the reflection sheet 11〇 after the reflection sheet is formed, and then inject the plastic.丨3 〇 to provide better UV resistance. It should be understood that although the present embodiment applies an anti-UV agent to the surface of the reflective sheet 11 但, this does not limit the invention, and it is known to those skilled in the art that the embodiment needs to be flexibly selected at that time. For example, for some inexpensive models, the manufacturer may choose not to apply an anti-UV agent or to mix the anti-UV agent directly into the reflective sheet. Sheets and plastics to avoid reflection of the reflectivity of the reflective sheet. The figure specifically illustrates how to implement the above. In some cases, the process conditions of step (3) (e.g., temperature) may affect the structure of the reflective sheet and, in turn, reduce the reflectivity of the reflective sheet. Thus, in another embodiment of the invention, the manufacturer may choose to combine only partial reflections. Hereinafter, the cavity 120 and the reflection according to another embodiment of the present invention will be described in FIG. 4 and FIG.
雖然本發明已以實施例揭露如上，缺 习尘竹的影響而下降。 上’然其並非用以限定 9 1330585 本發明，任何熟習此技藝者，在不脫離本發明之精神和範 圍内，當可作各種之更動與潤飾，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。 【圖式簡單說明】 第1-3㈣示依照本發明—實施例之背光模級的製造 流程剖面圖。 第4圖繪示依照本發明另—實施例之模穴與反射 剖面圖。 、 、 【主要元件符號說明】 :反射片 120 :模穴 122 :第一半模具 124 :第二半模具 K6 :凸出部 130 :塑料Although the present invention has been disclosed above by way of example, it is degraded by the influence of the bamboo dust. It is to be understood that the invention is not limited to the scope of the present invention, and that various modifications and refinements can be made without departing from the spirit and scope of the invention. The scope defined in the scope of application for patent application shall prevail. BRIEF DESCRIPTION OF THE DRAWINGS A 1-3 (four) shows a cross-sectional view showing a manufacturing process of a backlight module in accordance with the present invention. Figure 4 is a cross-sectional view showing a cavity and a reflection in accordance with another embodiment of the present invention. , [Main component symbol description]: Reflective sheet 120: Cavity 122: First half mold 124: Second mold half K6: Projection 130: Plastic