1261129 五、發明說明（1) 【發明所屬之技術領域】 本發明係關於一種導光板，尤其係關係一種具網點分 佈之導光板。 【先前技術】 由於液晶顯示器具輕、薄、耗電小等優點，廣泛應用 於筆記本電腦、行動電話、個人數位助理等現代化資訊設 備。因液晶本身不具發光特性，需為其提供背光模組以實 現顯示功能。 先前技術背光模組包括光源及導光板，光源係相對導 光板之入光面設置，該導光板引導自光源發出光束之傳輸φ 方向，將線光源或點光源轉換成面光源出射。該導光板之 底面分佈複數網點，用以破壞光束於導光板内部傳輸之全 反射條件，且使其散射以提高導光板出射光束之均勻性， 進而提昇背光模組之整體性能。 因網點面積密度的分佈對導光板之光學性能有著直接 的影響，故，該網點之疏密、大小及形狀均可有不同設計 以適應不同之背光模組。其中，等間距不同大小網點分佈 及等大小不同間距網點分佈技術廣為業界採用，其實質係 改變網點於導光板底面之面積分佈密度，以改善底面光線 _ 較少達到區域之對應出光面之出光能力，從而提高導光板 發光均勻度。先前等間距不同大小網點分佈及等大小不同 間距網點分佈技術一般係使網點分佈遵循一定規律，如特 定函數分佈，然，該等網點分佈由於有脈絡可循，他人可 非法採用反向工程（Reverse Engineering)輕易獲得及複1261129 V. INSTRUCTION DESCRIPTION OF THE INVENTION (1) Technical Field of the Invention The present invention relates to a light guide plate, and more particularly to a light guide plate having a dot distribution. [Prior Art] Due to its advantages of lightness, thinness, and low power consumption, liquid crystal display devices are widely used in modern information devices such as notebook computers, mobile phones, and personal digital assistants. Since the liquid crystal itself does not have a light-emitting property, it is required to provide a backlight module to realize the display function. The backlight module of the prior art includes a light source and a light guide plate. The light source is disposed opposite to the light incident surface of the light guide plate, and the light guide plate guides the direction of transmission of the light beam from the light source to convert the line light source or the point light source into a surface light source. The bottom surface of the light guide plate is distributed with a plurality of dots to destroy the total reflection condition of the light beam transmitted inside the light guide plate, and is scattered to improve the uniformity of the light beam emitted from the light guide plate, thereby improving the overall performance of the backlight module. Since the distribution of the dot area density has a direct influence on the optical performance of the light guide plate, the density, size and shape of the dot can be differently designed to accommodate different backlight modules. Among them, the distribution of equally spaced dots and dots and the distribution of equal-sized dots and dots are widely used in the industry. The essence is to change the area distribution density of the dots on the bottom surface of the light guide plate to improve the surface light _ less light reaching the corresponding light-emitting surface of the region Ability to improve the uniformity of light guide plate illumination. Previously distributed equally-sized dot distributions and equal-sized dots and dots distribution techniques generally make the distribution of the dots follow certain rules, such as the distribution of specific functions. However, due to the circulation of the dots, others can illegally use reverse engineering (Reverse). Engineering) easy to get and recover
1261129 五、發明說明（2) 製。 有鑑於此，提供一種網點分佈不易被獲得及複製之導 光板實為必需。 【發明内容】 本發明之目的在於提供一種網點分佈不易被獲得及複 製之導光板。 本發明導光板包括一底面與設置於該底面之複數網 點，該複數網點以如下方式分佈：獲得導光板之網點面積 密度分佈，及設定單位面積内之最大網點面積密度及最多 相同網點數量；計算導光板至少一單位面積内之該相同網 f 點數量；於導光板之該單位面積内隨機分佈對應數量之該 相同網點。 由於本發明導光板之網點分佈係根據一定規律原始分 佈之導光板網點，計算得單位面積内相同之網點面積分佈 密度之相同網點數量，隨機分佈該相同網點於導光板該單 位面積内，即將一定規律分佈之導光板網點於複數單位面 積内重新分佈，既保留導光板之出光均勻度，又使導光板 網點分佈不易被獲得及複製。 【實施方式】 請參閱第一圖，係本發明導光板原始網點分佈之示意 圖。該導光板2包括一底面2 1及設置於底面2 1之複數網點 2 5，該複數網點2 5為圓形，亦可為方形或菱形，其以印刷 法或射出成型製成，以破壞光線於導光板2内部之全反射 條件，並使其充分反射、散射以進一步提高整體光學性1261129 V. Description of invention (2) System. In view of this, it is necessary to provide a light guide plate in which the dot distribution is not easily obtained and reproduced. SUMMARY OF THE INVENTION An object of the present invention is to provide a light guide plate in which a dot distribution is not easily obtained and reproduced. The light guide plate of the present invention comprises a bottom surface and a plurality of mesh dots disposed on the bottom surface, wherein the plurality of mesh dots are distributed in the following manner: obtaining a dot area density distribution of the light guide plate, and setting a maximum dot area density and a maximum number of dots in a unit area; The number of the same mesh f points in the light guide plate at least one unit area; and the corresponding number of the same mesh points are randomly distributed in the unit area of the light guide plate. Since the dot distribution of the light guide plate of the present invention is based on a light guide plate dot originally distributed according to a certain rule, the same number of dots of the same dot area distribution density per unit area is calculated, and the same dot is randomly distributed in the unit area of the light guide plate, which is certain The regularly distributed light guide plate dots are redistributed in a plurality of unit areas, which not only preserves the light uniformity of the light guide plate, but also makes the distribution of the light guide plate dots difficult to obtain and copy. [Embodiment] Please refer to the first figure, which is a schematic diagram of the original dot distribution of the light guide plate of the present invention. The light guide plate 2 includes a bottom surface 2 1 and a plurality of mesh points 25 disposed on the bottom surface 2 1 . The plurality of dot dots 25 5 are circular or square or diamond shaped, and are formed by printing or injection molding to destroy light. The total reflection condition inside the light guide plate 2, and fully reflects and scatters it to further improve the overall optical property.
1261129 五、發明說明（3) 能。其中，該底面2 1係用以反射投射於其上之光線，防止 光線逸出，提高光束之利用率。 根據本發明，該複數網點2 5於底面2 1以如下方式分 佈： (1 ) 獲得導光板之網點面積密度分佈，及設定單位面 積内之最大網點面積密度及最多相同網點數量； (2) 計算導光板至少一單位面積内之該相同網點數 曰 · 虿 ， (3 ) 於導光板之該單位面積内隨機分佈對應數量之該 相同網點。 依步驟（1 )，獲得導光板2之網點2 5面積密度分佈，即 將該複數網點2 5設計成具一定規律之原始分佈，該網點2 5 係以等間距而大小變化之規律分佈，當然，其亦可以等間 距而形狀變化之規律分佈，如於圓形，方形與菱形之間變 化。 設計該複數網點2 5之分佈後’驗證網點2 5依該規律分 佈之導光板2之光學特性，確定該設計可行，然後計算導 光板2各單位面積内之網點2 5面積分佈密度。該網點2 5分 佈設計係需保密之原始設計。 以下步驟係對該規律分佈之網點2 5進行重新設計。 請一併參閱第二圖，重新設定網點2 5為相同之網點 2 6，例如，相同大小與形狀直徑為1 0 // m之圓形網點2 6。 於網點26所在區域建立平面直角座標（X，Y)，於平面直角 座標（X，Y)内將網點2 6所在區域劃分為複數單位面積1261129 V. Description of invention (3) Yes. The bottom surface 21 is used to reflect the light projected thereon to prevent light from escaping and improve the utilization of the light beam. According to the present invention, the plurality of dots 25 are distributed on the bottom surface 2 1 in the following manner: (1) obtaining a dot area density distribution of the light guide plate, and setting a maximum dot area density per unit area and a maximum number of dots; (2) calculating The same number of dots in the unit area of the light guide plate 曰· 虿, (3) randomly distributing the corresponding number of the same dots in the unit area of the light guide plate. According to the step (1), the area density distribution of the dots 2 of the light guide plate 2 is obtained, that is, the plurality of dots 25 are designed to have a regular original distribution, and the dots 25 are distributed with equal intervals and sizes, of course, It can also be regularly distributed with equal spacing and shape change, such as between a circle, a square and a diamond. After designing the distribution of the plurality of dots 25, the optical characteristics of the light guide plate 2 distributed according to the rule are determined, and the design is made feasible, and then the distribution density of the dot 25 area in each unit area of the light guide plate 2 is calculated. The site's 25-point design is the original design that needs to be kept confidential. The following steps are to redesign the regularly distributed outlets 25. Please refer to the second figure again to reset the dot 25 to the same dot 2 6, for example, a circular dot 2 6 of the same size and shape diameter of 10 // m. A plane rectangular coordinate (X, Y) is established in the area where the dot 26 is located, and the area where the dot 26 is located is divided into a plurality of unit areas in the plane right angle coordinates (X, Y).
第7頁 1261129 發明說明（4) 2 11 ’例如’没疋该單位面積2 1 1為1 m m2。設定單位面積 2 1 1内之隶大網點2 6面積密度及最多相同網點2 β數量，該 最大網點26面積密度係對應於各網點26互為相接之密度最 大情況，其數值D= 7Γ八2*31/2)〜0· 91，則該最多相同網點26數 量 N 係 1 0 0 0 0。 依步驟（2 )，假設選定一單位面積2 1 1之網點2 5面積密 度為D ’則可換异彳于該單位面積2 1 1内應放入網點2 6數量 〇 = N*D/M = 1 0 0 0 *D/(K91 二 1 0 98 9*D，隨後，依步驟（3)於導光 板2之②单位面知2 1 1内隨機分佈該數量之網點2 6 (請參'閱 第二圖）。依上述方法，導光板2各單位面積2 1 1内分別隨 機分佈對應數量之網點26，即將按原始規律分佈之導光板 2網點2 5於複數單位面積2 11内重新分佈，由於可設定該單 位面積2 1 1之合適大小，故可保留該網點2 6面積分佈之規 律，既保留導光板2之出光均勻度，又使導光板2網點26分 佈不易被獲得及複製。 惟，本發明導光板之網點分佈不限於上述設計。請一 併參閱第一圖及第四圖，如僅對導光板2部份網點2 5所在 區域計算各單位面積3 11内該相同網點3 6之數量，然後於 導光板2之该區域各單位面積3 1 1内隨機分佈對應數量之該 相同網點3 6 ’ 4相同網點2 6與3 6亦可以係以不同於原始網 點2 5分佈之任何規律分別分佈於各單位面積2 1 1與3 1 1内； 該相同網點2 6與3 6亦可係圓形，方形或菱形。 綜上所述’本發明確已符合發明專利之要件，麦依法 提出專利申請。惟，以上所述者僅為本發明之較佳實施方Page 7 1261129 DESCRIPTION OF THE INVENTION (4) 2 11 ' For example, 'the unit area 2 1 1 is 1 m m2. Set the area density of the Lida outlet in the unit area of 2 1 1 and the maximum number of 2 points of the same dot 2, the maximum density of the area 26 corresponds to the maximum density of each dot 26, and the value D=7Γ8 2*31/2)~0·91, then the maximum number of identical dots 26 is N 0 1 0 0 0 0. According to step (2), suppose that a cell point of 2 1 1 is selected, and the area density of the cell is 2, and the area density can be changed to be equal to the unit area. 2 1 1 should be placed in the network. 2 6 number 〇 = N*D/M = 1 0 0 0 *D/(K91 2 1 98 9 9*D, then, according to step (3), the 2 unit surface of the light guide plate 2 is known to randomly distribute the number of dots 2 6 (refer to ' According to the above method, the corresponding number of dots 26 are randomly distributed in each unit area of the light guide plate 2, that is, the light guide plate 2 dots 25 which are distributed according to the original law are redistributed in the complex unit area 2 11 Since the proper size of the unit area 2 1 1 can be set, the rule of the area distribution of the mesh point 26 can be retained, which not only preserves the light uniformity of the light guide plate 2, but also makes the distribution of the light guide plate 2 dot 26 difficult to be obtained and copied. However, the dot distribution of the light guide plate of the present invention is not limited to the above design. Please refer to the first figure and the fourth figure together, for example, the same dot 3 in each unit area of the light guide plate 2 is calculated. The number of 6 is then randomly distributed in the unit area of the light guide plate 2 within 31 1 1 The same network point 3 6 ' 4 same network points 2 6 and 3 6 may also be distributed in each unit area 2 1 1 and 3 1 1 according to any law different from the original network point 25 distribution; the same network point 2 6 and 3 6 can also be round, square or diamond. In summary, the invention has indeed met the requirements of the invention patent, and the patent application is filed according to law. However, the above is only the preferred embodiment of the invention.
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