200821062 九、發明說明： 【發明所屬之技術領域】 本發明係有關於一種背光模組燈罩之製造方法，特別 是有關於一種具有鏡面反射片之背光模組燈罩的製造方 法。 【先前技術】BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of fabricating a backlight module lampshade, and more particularly to a method of fabricating a backlight module lampshade having a specular reflection sheet. [Prior Art]
由於液晶顯示器（Liquid Crystal Display，LCD)的日益 普及，決定液晶顯示器亮度的背光模組的設計日趨精細。 背光模組依照光源入射位置的不同分成側光式入光 lighting)與直下式入光（b〇tt〇miighting)兩種，以提供液晶 顯示益所需之面光源。 、白知的側光式背光模組，係藉由燈罩將光源產生的光 線導入導光板，並通過不同光學目的光學膜片加以反射與 折射开/成輝度均勻的面光源，以提供液晶顯示器所需之 亮度。 ^’、、、第1圖，第1圖係根據習知技術所繪示之一種侧 光式背光模組的έ士媒；立, , . u π、、、。構不思圖。側光式背光模組係由 120、光源11〇金莫伞4 〃導先板130所組成。由光源11〇所出射的 3 入射至導光板130之中，另-部份則朝向 f3〇之中。° f由燈罩12G的反射，以進入導光板 因此，燈罩 中的光線能量， 12〇之反射效率將明顯影響射入導光板13〇 ,、p月顯衫響面板的的亮度。為了有效提 5 200821062 高燈罩120的反射率，燈罩12〇 旱12ϋ的内表面均配置有反射層， 以提高面板的亮度，減少能量的損失。 參閱弟2圖’其係緣示一種超 裡巷冗鏡面反射片的結構示 意圖。此種具有鏡面反射片之燈罩材料主要 η〇、黏著層220、鏡面反射片23()與保護層24〇，一般被 稱*之為超党鏡面n t 兄囱反射片（durable enhanced specular reflector ; DESR-M)孫 ώ 致 t o',、， )係由美商3M公司所生產，廣泛的應用 於液晶顯示器背光模組的燈罩。Due to the increasing popularity of liquid crystal displays (LCDs), the design of backlight modules that determine the brightness of liquid crystal displays has become increasingly sophisticated. The backlight module is divided into two types according to the difference of the incident position of the light source, and the direct light input (b〇tt〇miighting) to provide the surface light source required for the liquid crystal display. , Bai Zhi's edge-lit backlight module, which uses the lampshade to introduce the light generated by the light source into the light guide plate, and reflects and refracts the surface light source with uniform brightness by different optical optical films to provide a liquid crystal display device. The brightness required. ^',,, Fig. 1, Fig. 1 is a gentleman medium of a side-lit backlight module according to the prior art; Li, , u π, , , . Do not think about it. The edge-lit backlight module is composed of 120, a light source 11 〇金莫伞4 〃 guiding plate 130. The light emitted from the light source 11A is incident on the light guide plate 130, and the other portion is directed toward the f3. ° f is reflected by the lamp cover 12G to enter the light guide plate. Therefore, the light energy in the lamp cover, the reflection efficiency of 12 将 will significantly affect the brightness of the panel that is incident on the light guide plate 13〇, p. In order to effectively improve the reflectivity of the 200821062 high lampshade 120, the inner surface of the lampshade 12 is arranged with a reflective layer to increase the brightness of the panel and reduce the loss of energy. Referring to Figure 2, the lining shows a structural schematic of a mirror-like reflection sheet of a super lane. The lampshade material having the specular reflection sheet is mainly η〇, the adhesive layer 220, the specular reflection sheet 23() and the protective layer 24〇, and is generally referred to as a super-enhanced specular reflector (DSR). -M) Sun Wei Zhi t o',,, ) is produced by American 3M Company and is widely used in the lampshade of LCD backlight module.
’、、、而此種超売鏡面反射片或_似的反射材料卻存在 了-個嚴重的缺點。參閱第3圖，其係㈣習知背光模組 燈罩成形後，所產生之反射層突出部示意圖。由於此種反 射材料係利用一黏著層32〇將鏡面反射片33〇與保護層“Ο Ά附於基板31G之上。當形成燈罩谓時，由於折彎時造 成的反射層370,亦即黏著層32〇、鏡面反射片33〇與保護 層340,與基板31〇的相對位移，其將造成反射層在燈 罩的末端凸出，以致於形成例如是第一凸出部350及/ 或第二凸出部360。此種凸出於基板31〇的反射層，在導光 反裝入守極易被導光板碰撞而變形，其將使得背光模經 產生所謂摩爾效應（Moire effect)等影響液晶顯示器顯示品 貝的不良光影。此外，導光板亦容易將凸出的反射層 到洛以致於造成雜質附著於燈罩300的内面，嚴重地影響 背光模組的品質。 因此，為了避免降低背光模組的品質，也同時為了避 免雜質附著於燈罩300的内面，部分的燈罩製造商，利用 200821062 到除的方式，以降低及射層凸出於基板的高度，然而，其 不僅費工，且因刮除所產生的雜質亦容易附著於燈罩的内 面’故仍會影響背光模組的組立品質。 【發明内容】 鐾於上述之先前技術中所述，由於燈罩之反射層與基 板產生相對位移，以致於造成組立完成之背光模組的品質 下降，其不僅提高了液晶顯示器的生產成本，且更降低了 液晶顯示器的生產品質。 本發明之目的之一，係提供一種背光模組燈罩之製造 方=，其可有效地降低反射層凸出的長度，以致於改善背 光模組的品質，同時提升液晶顯示器的品質。 根據以上所述之目的，本發明係一種背光模組燈罩之 製造方法’包含有下列步驟。首先’提供具有—反射層與 一基材之反射薄板。折彎反射薄板，以形成一[型半成品， '型半成品具有一第_邊與一第二邊，然後切齊反射薄板 之第_邊或第二邊的反射層與基材。接著，再次折彎 薄板，以形成一 u型燈罩。 、 其中上述之反射層更包含一黏著層、一鏡面反射片以 及-保護層，利用黏著層黏著於基材之上。而上述 折彎的步驟係” U半成品的第—邊或第二邊。此外 用模治具切齊反㈣板之反射層與基㈣同時切除部分之 反射層與不锈鋼基材，然其亦可以僅切除反 锈鋼基材之部分。 於不 200821062 本發明之背光模組燈罩之製造方法，亦可以使用在一 板材上以同時形成複數個反射薄板於此板材上，進而形成 複數個U型燈罩。 因此，本發明之背光模組燈罩之製造方法，有效地降 低燈罩上反射層凸出於基材的長度，更可以減少燈罩形成 過程中之人I製程’故不僅可以有效地改善背光模組的品 質，同時亦提升液晶顯示器的品質與生產效率。 【實施方式】 本發明之背光模組燈罩之製造方法，不僅可有效地降 低反射層凸出於基材的長度，更可以免除燈罩形成後仍需 利用人工刮除凸出的反射層之額外的人工製程，因此可以 有效地改善背光模組的品質，同時亦提升液晶顯示器的品 貝與生產效率。以下將以圖示及詳細說明清楚說明本發明 之精神，如熟悉此技術之人員在瞭解本發明之較佳實施例 後，當可由本發明所教示之技術，加以改變及修飾，其並 不脫離本發明之精神與範圍。 參閱第4圖至第6圖，其係繪示本發明之背光模組燈 罩之製造方法示意圖。如圖中所示，首先提供一反射薄片 400以用來形成一背光模組燈罩。此反射薄片4〇〇較佳地包 含有基材410與反射層470形成於基材410之上。此反射 薄片400較佳地係由美商3M公司所生產之超亮鏡面反射 片（durable enhanced specular reflector ; DESR-M )所構成， 其中’反射層470係由保護層、鏡面反射片與黏著層所構 8 200821062 成。然而，此反射薄片400並不限定於上述之超亮鏡面反 射片，任何將反射層附著於基材且在成形後會於端部產生 之凸出反射層之燈罩材料均可利用本發明之方法改善凸出 的情況。其中，上述之反射薄片4〇〇亦可是複數個反射薄 片400同時形成於一大的板材上，以連續沖壓成形，以形 成複數個燈罩。 接著，參閱第5圖，進一步將反射薄片4〇〇形成一乙 形的半成品。如圖中所示，此L形的半成品具有一第一邊 406以及一第二邊408。其中在第一邊406與第二邊408的 端部，反射層470分別凸出於基材41〇,以致於形成了第一 凸出部450以及第二凸出部460。然後，沿著切割線4〇2 及/或切割線404將凸出的反射層470切除，使其與基材41〇 之端面一致，以消除反射層470凸出於基材41〇的情況。 其中，本發明並不限定沿著切割線402或切割線4〇4將反 ^層470切除，其可視實際組裝時之需求與問題點，僅沿 著切割線402或切割線404加以切除，或者是沿著切割線 402與切割線404將反射層470切除，其均不脫離本發明之 範圍。 此外，為使切除後之反射層470與基材41〇之端面一 致，較佳地係同時將反射層47〇與基材41〇沿著切割線加 以切除凸出的部份。 進一步麥閱第6圖，如圖中所示，當反射層47〇與基 材410的端面切齊後，再次折彎反射薄片400,以形成^斤^ 之u型燈罩。此u型燈罩具有第一端部6〇2、連接部 9 200821062 以及第二端部606。一般而言，第一端部6〇2與第二端部 606的長度並非一致，分別位於u型燈罩的兩端，並由連 接部604加以連接。 此外，由於反射薄片400在形成L形時，第一端部6〇2 的端面已被再次的裁切，故第三凸出部48〇將大幅的減少， 約可減少50%至60%的反射層470凸出於基材410的長 度。因此，將導光板與燈罩組立時，第三凸出部48〇可有 效地減少與導光板接觸或被折彎的機率，更可以減少因為 反射層470被刮落所產生的雜質。因此，可大幅的提高燈 罩、背光模組以及液晶顯示器的品質。 其中’第一端部602可由第5圖之第一邊406折彎所 形成，亦可以是由第二邊408折彎所形成。其中，當沿著 切割線402切除凸出的反射層4〇7，再折彎第二邊4〇8以形 成第二端部606與連接部604,可以形成較小的第三凸出部 48〇。然而，由於製程等因素的考量，本發明亦可以是先沿 著切割線402切除凸出的反射層4〇7，再折彎第一邊4〇6 以形成第一端部602與連接部604，此時第三凸出部48〇 上反射層370凸出於基材410的情況，仍可獲得改善，如 上述之減少50%至60%的反射層470凸出的情況，並有助 於提高燈罩、背光模組以及液晶顯示器的品質。 如熟悉此技術之人員所瞭解的，以上所述僅為本發明 之較佳實施例而已，並非用以限定本發明之申請專利範 圍。凡其它未脫離本發明所揭示之精神下所完成之等效改 變或修飾，均應包含在下述之申請專利範圍内。 200821062 【圖式簡單說明】 為讓本發明之上述和其他㈣、特徵、優點與實施例 月b更明顯易懂，所附圖式之詳細說明如下· ί1圖係為—種習知側光式背光模組的結構示意圖； ^2圖係為超亮鏡面反射片的結構示意圖； 2 3圖係為習知背光模組燈罩成形後，所產生之反射 層大出部不意圖；以及 I目至第6 ϋ係為本發明之背光模組燈罩之製造方 沃不思圖。 【主要元件符號說明】 110 ： 光源 120 ： 燈罩 130 ： 導光板 210 : 基材 220 ： 黏著層 230 : 鏡面反射片 240 : 保護層 300 ： 燈罩 310 : 基板 320 ： 黏著層 330 ： 鏡面反射片 340 ： 保護層 400 ··反射薄板 410 :基材 402 :切割線 404 :切割線 406 :第一邊 408 :第二邊 410 :基材 450 :第一凸出部 460 :第二凸出部 470 :反射層 480 :第三凸出部 490 :第四凸出部 200821062 350 ··第一凸出部 602 :第一端部 360 :第二凸出部 604 :連接部 370 :反射層 606 :第二端部',,, and such super-mirror specular reflection sheets or _like reflective materials exist - a serious drawback. Referring to Fig. 3, it is a schematic view of the protruding portion of the reflective layer produced by the conventional backlight module lampshade. Since the reflective material utilizes an adhesive layer 32〇, the specular reflection sheet 33〇 and the protective layer are “attached to the substrate 31G. When the lampshade is formed, the reflective layer 370, that is, adhered due to the bending, is adhered. The relative displacement of the layer 32〇, the specular reflection sheet 33〇 and the protective layer 340 with the substrate 31〇 will cause the reflective layer to protrude at the end of the lamp cover, so as to form, for example, the first protrusion 350 and/or the second The protrusion 360 protrudes from the reflective layer of the substrate 31〇, and is deformed by the light guide plate colliding with the light guide plate, which causes the backlight mold to affect the liquid crystal by generating a so-called Moire effect or the like. The display shows the bad light and shadow of the product. In addition, the light guide plate also easily exposes the protruding reflective layer to the inner surface of the lamp cover 300, which seriously affects the quality of the backlight module. Therefore, in order to avoid reducing the backlight module The quality, and at the same time, in order to avoid the adhesion of impurities to the inner surface of the lampshade 300, some of the lampshade manufacturers use the 200821062 to remove the height of the substrate and the projection layer, however, it is not only laborious. Moreover, the impurities generated by the scraping are also likely to adhere to the inner surface of the lamp cover. Therefore, the assembly quality of the backlight module is still affected. SUMMARY OF THE INVENTION As described in the above prior art, since the reflective layer of the lamp cover is opposite to the substrate The displacement is such that the quality of the backlight module that is completed is reduced, which not only improves the production cost of the liquid crystal display, but also reduces the production quality of the liquid crystal display. One of the objects of the present invention is to provide a backlight module lampshade. Manufacturer side =, which can effectively reduce the length of the reflective layer protruding, so as to improve the quality of the backlight module, and improve the quality of the liquid crystal display. According to the above, the present invention is a backlight module lampshade manufacturing method 'The following steps are included. Firstly, a reflective sheet having a reflective layer and a substrate is provided. The reflective sheet is bent to form a [type semi-finished product, the semi-finished product has a first side and a second side, and then is cut. Reflecting the reflective layer of the first or second side of the thin plate and the substrate. Then, bending the thin plate again to form a u-shaped lamp cover. In the above-described reflective layer further comprises an adhesive layer, a specular reflection sheet and - a protective layer, using the adhesive layer adhered to the substrate and the first step on the line "of the bent U semifinished product - or the second side edge. In addition, the reflective layer of the inverted (four) plate and the base (4) are simultaneously cut off from the reflective layer and the stainless steel substrate, and it is also possible to cut only the portion of the reverse-rust steel substrate.于不200821062 The manufacturing method of the backlight module lampshade of the present invention can also be used on a plate to simultaneously form a plurality of reflective sheets on the plate to form a plurality of U-shaped lampshades. Therefore, the manufacturing method of the backlight module lamp cover of the present invention effectively reduces the length of the reflective layer on the lamp cover protruding from the substrate, and can further reduce the human I process in the lamp cover forming process, so that the backlight module can be effectively improved. Quality, but also improve the quality and production efficiency of liquid crystal displays. [Embodiment] The manufacturing method of the backlight module lamp cover of the present invention can not only effectively reduce the length of the reflective layer protruding from the substrate, but also eliminate the need to manually scrape off the convex reflective layer after the lampshade is formed. The manual process can effectively improve the quality of the backlight module, and at the same time improve the quality and productivity of the liquid crystal display. The spirit and scope of the present invention will be apparent from the following description of the preferred embodiments of the invention. The spirit and scope of the present invention. Referring to Figures 4 through 6, a schematic view of a method of manufacturing a backlight module lamp cover of the present invention is shown. As shown in the figure, a reflective sheet 400 is first provided for forming a backlight module shade. The reflective sheet 4 〇〇 preferably comprises a substrate 410 and a reflective layer 470 formed over the substrate 410. The reflective sheet 400 is preferably composed of a Durable Enhanced Specular Reflector (DESR-M) manufactured by Messer 3M Co., Ltd., wherein the 'reflecting layer 470 is composed of a protective layer, a specular reflective sheet and an adhesive layer. Structure 8 200821062 成. However, the reflective sheet 400 is not limited to the above-described super bright specular reflection sheet, and any of the cover materials which adhere the reflective layer to the substrate and which is formed at the end after forming can utilize the method of the present invention. Improve the bulging situation. The reflective sheet 4 can also be formed on a large sheet of material at the same time and continuously formed by stamping to form a plurality of shades. Next, referring to Fig. 5, the reflective sheet 4 is further formed into an E-shaped semi-finished product. As shown in the figure, the L-shaped semi-finished product has a first side 406 and a second side 408. At the ends of the first side 406 and the second side 408, the reflective layer 470 protrudes from the substrate 41, respectively, so that the first protrusion 450 and the second protrusion 460 are formed. Then, the convex reflective layer 470 is cut along the cutting line 4〇2 and/or the cutting line 404 to conform to the end faces of the substrate 41〇 to eliminate the case where the reflective layer 470 protrudes from the substrate 41〇. Wherein, the present invention is not limited to cutting the reverse layer 470 along the cutting line 402 or the cutting line 4〇4, which can be cut along the cutting line 402 or the cutting line 404, depending on the needs and problems in actual assembly, or The reflective layer 470 is cut along the cutting line 402 and the cutting line 404, all without departing from the scope of the invention. Further, in order to make the reshaped reflective layer 470 coincide with the end surface of the substrate 41, it is preferable to simultaneously remove the convex portion 47 from the substrate 41 along the dicing line. Further, referring to Fig. 6, as shown in the figure, when the reflective layer 47 is aligned with the end surface of the substrate 410, the reflective sheet 400 is bent again to form a u-shaped lamp cover. The u-shaped lampshade has a first end portion 〇2, a connecting portion 9200821062 and a second end portion 606. In general, the lengths of the first end portion 6〇2 and the second end portion 606 are not identical, and are respectively located at both ends of the u-shaped lamp cover and are connected by the connecting portion 604. In addition, since the end surface of the first end portion 6〇2 has been cut again when the reflective sheet 400 is formed in an L shape, the third projection portion 48〇 is greatly reduced, and can be reduced by about 50% to 60%. The reflective layer 470 protrudes from the length of the substrate 410. Therefore, when the light guide plate and the lamp cover are assembled, the third projecting portion 48 〇 can effectively reduce the probability of contact with the light guide plate or being bent, and can further reduce impurities caused by the scraping of the reflective layer 470. Therefore, the quality of the lampshade, the backlight module, and the liquid crystal display can be greatly improved. The first end portion 602 may be formed by being bent by the first side 406 of FIG. 5 or by the second side 408 being bent. Wherein, when the convex reflective layer 4〇7 is cut along the cutting line 402, and the second side 4〇8 is bent to form the second end 606 and the connecting portion 604, a smaller third protruding portion 48 can be formed. Hey. However, due to factors such as process and the like, the present invention may also first cut the convex reflective layer 4〇7 along the cutting line 402, and then bend the first side 4〇6 to form the first end 602 and the connecting portion 604. At this time, in the case where the third protrusion 48 is protruded from the substrate 410 by the reflective layer 370, improvement can be obtained, as described above, the reflection layer 470 is reduced by 50% to 60%, and contributes to Improve the quality of lampshades, backlight modules, and liquid crystal displays. The above description is only for the preferred embodiment of the present invention, and is not intended to limit the scope of the invention. All other equivalent changes or modifications made without departing from the spirit of the invention are intended to be included within the scope of the appended claims. 200821062 [Simplified description of the drawings] In order to make the above and other (four), features, advantages and embodiments of the present invention more obvious and easy to understand, the detailed description of the drawings is as follows: ί1 is a conventional side light type Schematic diagram of the backlight module; ^2 is a schematic diagram of the structure of the super bright specular reflection sheet; 2 3 is the conventional reflector module after the formation of the reflector, the resulting reflective layer is not intended; and The sixth is the manufacture of the backlight module lampshade of the present invention. [Main component symbol description] 110 : Light source 120 : Lamp cover 130 : Light guide plate 210 : Substrate 220 : Adhesive layer 230 : Specular reflection sheet 240 : Protective layer 300 : Lamp cover 310 : Substrate 320 : Adhesive layer 330 : Specular reflection sheet 340 : Protective layer 400 · · Reflective sheet 410 : Substrate 402 : Cutting line 404 : Cutting line 406 : First side 408 : Second side 410 : Substrate 450 : First protruding portion 460 : Second protruding portion 470 : Reflection Layer 480: third protrusion 490: fourth protrusion 200821062 350 · first protrusion 602: first end 360: second protrusion 604: connection part 370: reflective layer 606: second end unit
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