200916903 九、發明說明： 【發明所屬之技術領域】 本發明係提供一種導光板及其製作方法，尤指一種於 入光面形成有雷射加工圖樣之導光板及其製作方法。 【先前技術】 由於液晶本身並不會發光’因此背光模組可謂為液晶 顯示器（liquid crystal display, LCD)面板的關鍵零組件，其 主要功能便在供應亮度充分及分佈均勻的光源，以使LCD 面板此夠正常顯示影像。而隨著LCD面板已廣泛應用於眾 夕具成長潛力的電子產品’如監視器（monitor)、筆記型電 腦、數位相機、投影機等等，背光模組及其相關零組件的 需求也持續成長中。 一般而言’背光模組可根據光源之所在位置，分成光源 產生自顯示面板正下方的直下式（direct_type)背光模組與 光源來自顯示面板側邊附近的側光式(edge_type)背光模 組兩種設計。而其中由於側光式背光模組係將光源產生器 設於顯示面板的側邊’因此可縮小液晶顯示器之體積與製 造成本’而應用於小型之電器產品。 200916903 請參閱第1圖，第1圖為先前技術一側光式背光模組 10之示意圖。側光式背光模組10係設於一顯示面板12的 下方，側光式背光模組10主要包含有一導光板(light guide plate, LGP)14設於顯示面板12下方，複數個光源16設於 導光板14之一側，其係可為發光二極體(Light emitting diode, LED)，一燈罩18設於複數個光源16之外側，一反 射板(reflecting sheet)20設於導光板14下方，用來將向下 穿出導光板14的光線反射回導光板14，一光學材料層22 設於導光板14與顯示面板12之間。其中，光源16係用來 提供一光源至顯示面板12，燈罩18及反射板20係用於將 光源16所產生的光線反射至導光板14中以增加光的使用 率，以進而提供一較佳之亮度輸出。導光板14下方之微型 散射點可以破壞光線在導光板14的全反射而將光線折射 出導光板14進入光學材料層22，光學材料層22可將由導 光板14折射出之光線進一步霧化與聚光，以提供顯示面板 12較均勻與高正視角亮度之光源。 由上述可知，導光板14為側光式背光模組10之關鍵零 件之一，導光板14之作用在於引導光的散射方向，用來提 高顯示面板12的輝度，並確保顯示面板12亮度的均勻性， 因此導光板14的設計與製造攸關背光模組光學設計與輝 度、均細度的控制，為背光模組廠商最主要的技術與成本 所在。一般而言，習知導光板14圖樣的製作方式依製程有 7 200916903 兩種，第一種方式係運用網版印刷（screen printing)方式， 在壓克力平板上使用具「高反射率」且「不吸光」的材料， 在導光板14底面印上圓形或方形之圖樣；第二種方式係利 用模具，直接射出成型形成具圖樣之導光板14，其中圖樣 可形成於導光板14之出光面或入光面。請參閱第2圖，第 2圖為先前技術導光板14射出成型之示意圖。先將具有導 光板圖樣之一薄片金屬24平貼於射出成型模具之一母模 (或鏡面模仁）26上，然後進行合模，使一公模28與母模 26緊密結合。此時，將原料（通常為丙烯，俗稱壓克力）沿 箭頭方向由公模28的射出口注入一模穴30中，並配合射 出機、熱壓機等複製機台，以完成具有圖樣之導光板14的 製作，而其中導光板14之圖樣則可利用刀具、車床、線切 割、蝕刻、喷砂等加工技術形成於薄片金屬24上。 然而於先前技術導光板製作技術中，由於製作導光板 之模具是採取喷砂或刀具雕刻加工等以形成圖樣，若採取 刀具雕刻加工技術會有刀具成本耗損大、製作時程長、精 密度差，以及導光板14圖樣缺乏多樣性之缺點；再者，喷 砂與蝕刻之加工重現性不佳，故無法有效提升模具製作之 重複性，造成模具製作時常會產生光分佈之偏移；此外， 於導光板圖樣疏密分佈之控制方面，若欲利用喷砂面以不 同粗糙度分佈來調整導光板圖樣疏密之分佈，進而藉以調 整背光模組發光之均勻度，遺憾地於現行喷砂加工技術無 8 200916903 法精確地做到控制導光板上不同區域之加工點疏密程度， 然而倘若僅能製作成整面相同粗糙度之喷砂霧面，則背光 模組發光之均勻度又不易被調整，其皆為現今導光板製作 所面臨之瓶頸。 【發明内容】 本發明係提供一種於入光面形成有雷射加工圖樣之導 光板及其製作方法，以解決上述之問題。 本發明之申請專利範圍係揭露一種製作一導光板之方 法，其包含：（a)利用雷射打擊一模板，以於該模板之一表 面上形成複數個凹孔；以及(b)利用該模板製作該導光板， 以於該導光板之一入光面上形成複數個雷射加工圖樣。 本發明之申請專利範圍係揭露一種側光式背光模組， 包含有一光源，以及一導光板，安裝於該光源之側面’該 導光板包含有一入光面，用來導入該光源所發出之光線至 該導光板内，該入光面上係設有複數個雷射加工圖樣，該 導光板另包含有一出光面，用來導出該光源射入該導光板 之光線。 【實施方式】 200916903 請參閱第3圖，第3圖為本發明一側光式背光模組50 之示意圖。如第3圖所示，側光式背光模組50係設於一顯 示面板52的下方，側光式背光模組50主要包含有一導光 板54，設於顯示面板52下方；複數個光源56，設於導光 板54之一侧，其係可為複數個發光二極體；一燈罩58， 設於光源56之外側；一反射板60，設於導光板54下方， 以及一光學材料層62,設於導光板54與顯示面板52之間。 其中光源56係用來發射光線至顯示面板52，燈罩58及反 射板60係用於將光源56所產生的光線反射至導光板54中 以增加光的使用率，以進而提供一較佳之亮度輸出。導光 板54係用來將光源56產生之光線散射至光學材料層62， 導光板54係可為一壓克力板，光學材料層62可將由導光 板54折射出之光線進一步霧化與聚光收斂，其可包含棱鏡 片等光學材料，以提供顯示面板52較均勻與較高正視角亮 度的光線。 請參閱第3圖、第4圖，與第5圖，第4圖為本發明 導光板54之外觀示意圖，第5圖為本發明導光板54之結 構側視圖。導光板54包含有一入光面64，用來導入光源 56所發出之光線至導光板54内，以及一出光面66，用來 導出光源56射入導光板54之光線至導光板54上方之光學 材料層62，而後光學材料層62可將由導光板54折射出之 200916903 2線進:步霧減聚光“，叫供齡面板Μ 圖樣沾，形成於導光板Z 另包含複數個雷射加工 其中雷二 =^ 狀結構等，且複數個雷射Γ二二广―結構或1 或以線性方式排列等。形===方式排列 工圖樣68係用來均勻散射光線至光學材=個:射加 樣㈣用來提高二先面，上之複數個雷射加工圖 弧的現象產生，且可增進側輝度的均勻性’減少光 縮短㈣的混光距離。切56之混光效果，有效 請參閱第6圖，第& n ^ ^ 第6圖為本發明製作導光板54之流程 圖，本發明之料包含訂列步驟： 步驟100 :調整雷射之加工參數。 步驟心利用該調整過之雷射於—模板之表面上形成複 數個凹孔。 步驟104 :利用該模板製作導光板54，以於導光板54之入 光面64上形成複數個雷射加工圖樣砧。 於此繼續„羊細描述上述流程之步驟，首先可先調整雷射 之加工參數’例如雷射之強度、頻率、打擊發數等，以控 11 200916903 制該^數個凹切賴板均叙凹陷 等，其中該雷射係可A —疏在程度 雷射等，接下來再利用該^雷射，如可為_各⑽-酬 孔，該模板係可為鋼材= 出複數個凹200916903 IX. Description of the Invention: [Technical Field] The present invention provides a light guide plate and a method of fabricating the same, and more particularly to a light guide plate having a laser processing pattern formed on a light incident surface and a method of fabricating the same. [Prior Art] Since the liquid crystal itself does not emit light, the backlight module can be said to be a key component of a liquid crystal display (LCD) panel, and its main function is to supply a light source with sufficient brightness and uniform distribution to make the LCD The panel is enough to display the image normally. And as LCD panels have been widely used in electronic products such as monitors, notebook computers, digital cameras, projectors, etc., the demand for backlight modules and related components continues to grow. in. Generally, the backlight module can be divided into a direct-type backlight module directly under the display panel and a light source from the edge-type backlight module near the side of the display panel according to the position of the light source. Kind of design. In this case, since the edge-lit backlight module has the light source generator disposed on the side of the display panel, it can be used for small-sized electrical products by reducing the size and manufacturing of the liquid crystal display. 200916903 Please refer to FIG. 1 , which is a schematic diagram of a prior art side light backlight module 10 . The side light type backlight module 10 is disposed under a display panel 12, and the side light type backlight module 10 mainly includes a light guide plate (LGP) 14 disposed under the display panel 12, and the plurality of light sources 16 are disposed on the display panel 12 One side of the light guide plate 14 may be a light emitting diode (LED), a light cover 18 is disposed on the outer side of the plurality of light sources 16, and a reflecting sheet 20 is disposed under the light guide plate 14. The light that passes through the light guide plate 14 is reflected back to the light guide plate 14 , and an optical material layer 22 is disposed between the light guide plate 14 and the display panel 12 . The light source 16 is used to provide a light source to the display panel 12. The light cover 18 and the reflector 20 are used to reflect the light generated by the light source 16 into the light guide plate 14 to increase the light usage rate, thereby providing a better one. Brightness output. The micro-scattering point under the light guide plate 14 can destroy the total reflection of the light in the light guide plate 14 and refract the light out of the light guide plate 14 into the optical material layer 22. The optical material layer 22 can further atomize and condense the light refracted by the light guide plate 14. Light to provide a light source with a uniform and high positive viewing angle brightness of display panel 12. As can be seen from the above, the light guide plate 14 is one of the key components of the edge-lit backlight module 10. The light guide plate 14 serves to guide the scattering direction of the light, and is used to improve the brightness of the display panel 12 and ensure uniform brightness of the display panel 12. Therefore, the design and manufacture of the light guide plate 14 controls the optical design and brightness and uniformity of the backlight module, which is the most important technology and cost for the backlight module manufacturer. In general, the conventional light guide plate 14 is produced in accordance with the process of 7 200916903. The first method uses screen printing, and the "high reflectivity" is used on the acrylic plate. The material of "non-light-absorbing" is printed with a circular or square pattern on the bottom surface of the light guide plate 14; the second method is to directly form and form a light guide plate 14 with a pattern by using a mold, wherein the pattern can be formed on the light guide plate 14 Face or light surface. Please refer to FIG. 2, which is a schematic view showing the injection molding of the prior art light guide plate 14. First, a sheet metal 24 having a light guide plate pattern is flatly attached to one of the mother molds (or mirror mold cores) 26 of the injection molding mold, and then the mold is clamped to closely bond a male mold 28 and the female mold 26. At this time, the raw material (usually propylene, commonly known as acrylic) is injected into the cavity 30 from the injection port of the male mold 28 in the direction of the arrow, and is matched with the copying machine such as the injection machine and the hot press to complete the pattern. The light guide plate 14 is formed, and the pattern of the light guide plate 14 can be formed on the sheet metal 24 by a processing technique such as a cutter, a lathe, wire cutting, etching, sand blasting or the like. However, in the prior art light guide plate manufacturing technology, since the mold for manufacturing the light guide plate is formed by sand blasting or tool engraving, etc., if the tool engraving processing technology is adopted, the tool cost is large, the manufacturing time is long, and the precision is poor. And the lack of diversity of the light guide plate 14 pattern; in addition, the reproducibility of the sandblasting and etching process is not good, so the reproducibility of the mold making can not be effectively improved, resulting in a shift of the light distribution often occurs in the mold making; In the control of the dense distribution of the light guide plate pattern, if the blasting surface is to be used to adjust the distribution of the light guide plate with different roughness distribution, thereby adjusting the uniformity of the illumination of the backlight module, unfortunately the current sand blasting Processing technology without 8 200916903 method accurately control the density of processing points in different areas of the light guide plate, but if only the same surface roughness of the same surface of the sandblasted matte surface, the uniformity of the backlight module is not easy It has been adjusted, which is the bottleneck faced by today's light guide plate production. SUMMARY OF THE INVENTION The present invention provides a light guide plate having a laser processing pattern formed on a light incident surface and a method of fabricating the same to solve the above problems. The patent application of the present invention discloses a method of fabricating a light guide plate comprising: (a) striking a template with a laser to form a plurality of recessed holes on one surface of the template; and (b) utilizing the template The light guide plate is formed to form a plurality of laser processing patterns on a light incident surface of one of the light guide plates. The invention relates to an edge-lit backlight module comprising a light source and a light guide plate mounted on a side of the light source. The light guide plate includes a light incident surface for introducing light emitted by the light source. In the light guide plate, a plurality of laser processing patterns are disposed on the light incident surface, and the light guide plate further includes a light emitting surface for deriving light of the light source into the light guide plate. [Embodiment] 200916903 Please refer to FIG. 3, which is a schematic diagram of a side optical backlight module 50 of the present invention. As shown in FIG. 3, the edge-lit backlight module 50 is disposed under a display panel 52. The edge-lit backlight module 50 mainly includes a light guide plate 54 disposed under the display panel 52. The light guide plate 54 is disposed on one side of the light guide plate 54 and is a plurality of light emitting diodes. A light cover 58 is disposed on the outer side of the light source 56. A reflective plate 60 is disposed under the light guide plate 54 and an optical material layer 62. It is disposed between the light guide plate 54 and the display panel 52. The light source 56 is used to emit light to the display panel 52. The light cover 58 and the reflector 60 are used to reflect the light generated by the light source 56 into the light guide plate 54 to increase the light usage rate, thereby providing a better brightness output. . The light guide plate 54 is used to scatter the light generated by the light source 56 to the optical material layer 62. The light guide plate 54 can be an acryl plate. The optical material layer 62 can further atomize and condense the light refracted by the light guide plate 54. Convergence, which may include optical materials such as prism sheets to provide light that is more uniform and has a higher positive viewing angle brightness of display panel 52. Referring to Fig. 3, Fig. 4, and Fig. 5, Fig. 4 is a schematic view showing the appearance of the light guide plate 54 of the present invention, and Fig. 5 is a side view showing the structure of the light guide plate 54 of the present invention. The light guide plate 54 includes a light incident surface 64 for introducing light emitted from the light source 56 into the light guide plate 54, and a light exiting surface 66 for guiding the light of the light source 56 incident on the light guide plate 54 to the light above the light guide plate 54. The material layer 62, and then the optical material layer 62 can refract the 200916903 2 line refracted by the light guide plate 54: step fog reduction light, called the age panel Μ pattern, formed on the light guide plate Z and further includes a plurality of laser processing Lei two = ^ shape structure, and a plurality of lasers Γ two two wide - structure or 1 or linear arrangement, etc. Shape == = way to arrange the work pattern 68 is used to evenly scatter light to the optical material = one: shot The sample loading (4) is used to increase the phenomenon of the second laser surface on the second surface, and the uniformity of the side luminance can be improved, and the light mixing distance of the light shortening (four) can be reduced. Referring to Figure 6, the & n ^ ^ Figure 6 is a flow chart of the present invention for fabricating the light guide plate 54. The material of the present invention includes the following steps: Step 100: Adjust the processing parameters of the laser. a laser that forms a plurality of concaves on the surface of the template Step 104: The light guide plate 54 is formed by using the template to form a plurality of laser processing pattern anvils on the light incident surface 64 of the light guide plate 54. Here, the steps of the above process are described in detail, and the lightning can be adjusted first. The processing parameters of the shots, such as the intensity, frequency, and number of hits of the laser, are controlled by 11 200916903, and the number of concave cut boards is uniform, etc., wherein the laser system can be A-sparing degree laser, etc. Then use the ^ laser, such as _ each (10) - reward hole, the template can be steel = a number of concave
笙 坚見力材質專，如SUS，STAVAX 表面且之作用原理為利用雷射之能量熱熔該模板 Γ二2材料本身之内聚力以及其表面張力之作 用’故轉射光職擊之處會產生球形之凹孔。接下來， =該Γ乍為模仁，並使用該模板進行射出成型或 熱壓成型以製作導光板54，而導光板“之雷射加工圖樣 68則係對應於職板被料光束㈣難生之凹孔處。 而導光板54之入朵 上雷射加工圓樣68係可設計 為間隔式之佈點設計’請參閱第7圖至第9圖，第7圖至 第9圖為本發明各種形式之雷射加工圖樣68之佈點結構示 意圖。雷射加工圖樣68可為規格排列或為不規則排列，端 視設計需求而定’舉例來說，本發明可於導光板54之入光 面64上各LED光源56間的入光處加入雷射加工圖樣68, 藉由雷射加X圖樣68之配置可有效地將光源％所射出之 光線政射至導光板54内部，而縮短LED光源％之混光距 離’藉以改善各光源56間之暗點現象，進而解決側光式背 光模組5〇的暗點問題，且同時可有效利用LED光源56之 毛光效應以及匹配led光源56之數量，以減少LED光源 56之使用數量’而達到降低成本之目的。此外，經過亮暗 200916903 •帶周整改善後’可有效地增加導光板54之出光效率，進 而增大顯示面板52之可視範圍。 相較於切技狀導純及其製作方式，本發明形成導 以板圖樣之方法係利用雷射加工技術製作導光板之模具， 光使導光板之入光面形成雷射加工圖樣，進而大幅提高導 光 ^光效率，此外將雷射加工製程應用於導光板之入 間面之模仁上具有下列優點：可有效地縮短製程加工時 密声減J製作成本、可進行多樣化的圖樣設計、具有高精 有戈因使用雷射加工，未與模仁作接觸式之加工，故未 像刀具耗損現象，以及可改善導光板入光側的光弧現 達到混光效果，並能縮短混光距離等。此外，採用雷 射加工 > 抬 、模具由於其精密度高，故模具之重現性佳，意即 導、升板具製作之重複性。綜上所述，本發明可有效增加 光板之發光效率與品質以及降低導光板之製作成本，因 有助於提升市場競爭力和產品利潤。 以上所述僅為本發明之較佳實施例，凡依本發明申請 圍所做之岣等變化與修飾，皆應屬本發明專利之涵 意範園。 【圖式簡單說明】 13 200916903 第1圖為先前技術側光式背光模組之示意圖。 第2圖為先前技術導光板射出成型之示意圖。 第3圖為本發明側光式背光模組之示意圖。 第4圖為本發明導光板之外觀示意圖。 第5圖為本發明導光板之結構侧視圖。 第6圖為本發明製作導光板之流程圖。 第7圖至第9圖為本發明各種形式之雷射加工圖樣之佈點 結構示意圖。 【主要元件符號說明】 10 側光式背光模組 12 顯示面板 14 導光板 16 燈管 18 燈罩 20 反射板 22 光學材料層 24 薄片金屬 26 母模 28 公模 30 模穴 50 侧光式背光模組 52 顯示面板 54 導光板 56 光源 58 燈罩 60 反射板 62 光學材料層 64 入光面 66 出光面 68 雷射加工圖樣 14笙 见 材质 material, such as SUS, STAVAX surface and the principle of action is to use the energy of the laser to fuse the template Γ 2 2 material itself cohesion and the role of its surface tension The recessed hole. Next, the Γ乍 is a mold, and the template is used for injection molding or thermoforming to form the light guide plate 54, and the laser processing pattern 68 of the light guide plate corresponds to the light beam of the job board (four). The recessed hole of the light guide plate 54 can be designed as a spaced-apart layout design. Please refer to Figures 7 to 9. Figure 7 to Figure 9 show various Schematic diagram of the arrangement of the laser processing pattern 68 of the form. The laser processing pattern 68 may be arranged in an irregular arrangement or in an irregular arrangement depending on the design requirements. For example, the present invention may be applied to the light incident surface of the light guide plate 54. The laser processing pattern 68 is added to the light incident between the LED light sources 56. The arrangement of the laser plus X pattern 68 can effectively illuminate the light emitted by the light source % into the light guide plate 54, thereby shortening the LED light source%. The light mixing distance 'is improved the dark point phenomenon between the light sources 56, thereby solving the dark point problem of the edge light type backlight module 5〇, and at the same time effectively utilizing the hair light effect of the LED light source 56 and matching the number of the LED light sources 56. To reduce the number of LED light sources 56 used To reduce the cost. In addition, after the bright and dark 200916903 • with the improvement of the circumference, the light extraction efficiency of the light guide plate 54 can be effectively increased, thereby increasing the visible range of the display panel 52. Compared with the cutting technique and its production In the method, the method for forming a plate pattern is formed by using a laser processing technology to form a light guide plate, and the light entering the light surface of the light guide plate forms a laser processing pattern, thereby greatly improving the light guiding efficiency and the laser beam. The processing process is applied to the mold core of the light guide plate to have the following advantages: the utility model can effectively shorten the manufacturing cost of the dense sound reduction process during the processing, can carry out diversified pattern design, and has high precision and use of laser processing by Goin. It is not in contact with the mold, so it is not like the tool wear phenomenon, and the light arc on the light-incident side of the light guide plate can be improved to achieve the light-mixing effect, and the light-mixing distance can be shortened. In addition, laser processing is used. Due to its high precision, the mold and the mold have good reproducibility, which means that the guide and the riser are made with repeatability. In summary, the invention can effectively increase the light emission of the light plate. The rate and quality and the reduction of the manufacturing cost of the light guide plate are helpful to enhance the market competitiveness and product profit. The above description is only a preferred embodiment of the present invention, and the changes and modifications made by the application according to the present invention are modified. All of them should belong to the meaning of the patent of the invention. [Simplified illustration] 13 200916903 Figure 1 is a schematic diagram of a prior art edge-lit backlight module. Figure 2 is a schematic view of prior art light guide plate injection molding. 3 is a schematic view of the side light type backlight module of the present invention. Fig. 4 is a schematic view showing the appearance of the light guide plate of the present invention. Fig. 5 is a side view showing the structure of the light guide plate of the present invention. Fig. 7 to Fig. 9 are schematic diagrams showing the arrangement of various types of laser processing patterns according to the present invention. [Main component symbol description] 10 side light type backlight module 12 display panel 14 light guide plate 16 lamp tube 18 lamp cover 20 reflection Plate 22 Optical material layer 24 Sheet metal 26 Master mold 28 Male mold 30 Cavity 50 Side-light backlight module 52 Display panel 54 Light guide plate 56 Light source 58 Shade 60 Reflector 62 Optics The layer 64 surface 66 surface 68 into the laser processing patterns 14