M368806 五、新型說明： 【新型所屬之技術領域】 本創作有關於一種導光板及應用該導光板之背光模組，尤指一種 •可提昇光能利用率之導光板及背光模組。 .【先前技術】M368806 V. New Description: [New Technology Field] This paper is about a light guide plate and a backlight module using the same, especially a light guide plate and a backlight module which can improve the utilization of light energy. [Prior Art]
近年來，隨著液晶顯示器的彩色化及大型化，應用領域更為 廣泛:如筆記型電腦、手機、液晶電視等。因液晶顯示器為一種 被動元件，其本身不能發光，因而需利用—光源系統作為液晶顯 示器的光源’如背光模組是由反射片、擴散片、稜鏡片、導光板 及光源組成，其中，導絲是背絲組中重要元件，其目的在於 引導光的散射方向，將線杨或點光源轉換成面光源射出。 如圖- A及圖-B所示，制背光模組1()具有—導光板n 及一反射片！2,該導光板丨丨具有一入光面13、一出光面14、 及複數網點微結構l5a、15b。該網點微結構為圓形凸點丨5歧圖 一 A)或凹點15b(圖一 B)。光源16發出的光線由入光面13進入 導光板11並根據全反射原理在内部傳播，當光線遇到網點微結 構(Pattern)15a時，全反射條件被破壞，並使光線自出光面“射 出。由於網點微結構15a無法容許較多的光線產生折射，因此使 得光線最後射出的角度小於全反射肖度，造成背光模組1〇的出 光輝度及均勻度不佳。 如圖一 B所示，該網點微結點15b為圓形凹點，因此，光源 16發出的光線將會提高其二次折射而增加能量的損耗，致使該 3 M368806 ......... . ..... ... .. . . . ·. 背光模組10的導光效應變差，出光輝度無法提昇。 有蓉於此’目前f要-種能有_用光線之網點微結構，進 而提南亮度與均勻度之導光板及背光模組。 【新型内容】 板 本創作之主要目的在於提供—種可提高光能利用率 之導光 種可提高光能利用率之背光 本創作之另一目的在於提供一 模組。 本創作導光板包括-入光面，用以接收光線，並進入導光 板；一出光面，位於導光板的上表面並與入光面相鄰；一底面 與該出光面相對，·及至少一網點微結構，設置於底面，具有一援 錐狀中央凸起及-環形凹槽環繞在中央凸起的底部周園。 本創作背光模組包括-導光板，具有一入光面，用以接收夫 線並進入導光板，一出光面，位於導光板的上表面並盘該入为 面相鄰’-底面，與該出光面相對，及至少一網點微結構，設置 導光板的底面，具有__圓錐狀中央凸起及—環形凹槽環繞在中 央凸起的底部周圍;及一光源，靠近導光板的入光面。 本創作確信新穎之特徵係詳述於後附之申請專利範圍 中。然而新型之結構、操作方式以及目的與優點，藉由參考下 列之敘述及附圖，t可更加容易了解。 【實施方式】 如圖一及圖三所示，本創作導光板20包括-入光面2]1，一 M368806 < 出光面22位於該導光板2〇的上表面並與入光面21相鄰，一底 面23與出光面22相對，及至少一網點微結構24設於底面23。 本創作的特點在於網點微結構24,具有一圓錐狀中央凸起25、 及-環形凹槽26環繞在中央凸起25的底部周圍。光源發出之光 " 光面21進入導光板20並根據全反射原理在内部傳播，當 光線遇到咖微結構24時，會改變光線行料方向，引導光線 中央凸起25或環形凹槽26射出，因此只有網點微結構24分 佈的區域才會有光線射出，可引導至需要出光的位置。而且，光 線透過中央凸起25可料财的光線產生折射，及藉由中央凸 起25的邊緣導光效果，得以降低光線二次折射，減少能量的耗 損，提高光能洲率，使導絲具有較佳之出光輝度及均句度。 實質上，複數網點微結構24可依出光面22的出光位置需求 而在底面23做不同的幾何形狀排列如圓形、矩形或文字。 如圖四所示，顯示應用本創作導光板（圖二及圖三）之背光模 組30’包括一導光板2〇, 一朵源叫，这―e .，一 — ·In recent years, with the colorization and large-scale of liquid crystal displays, applications have become more widespread: such as notebook computers, mobile phones, and LCD TVs. Since the liquid crystal display is a passive component, it cannot emit light by itself, so it is necessary to use a light source system as a light source of the liquid crystal display. For example, the backlight module is composed of a reflection sheet, a diffusion sheet, a cymbal sheet, a light guide plate and a light source, wherein the guide wire It is an important component in the back wire group. Its purpose is to guide the direction of light scattering, and convert the line or point source into a surface source. As shown in Figure-A and Figure-B, the backlight module 1 () has a light guide plate n and a reflection sheet! 2. The light guide plate has a light incident surface 13, a light exit surface 14, and a plurality of dot micro-structures 15a, 15b. The dot microstructure is a circular bump 丨5 ambiguity map A) or a pit 15b (Fig. 1 B). The light emitted by the light source 16 enters the light guide plate 11 from the light incident surface 13 and propagates internally according to the principle of total reflection. When the light encounters the dot pattern 15a, the total reflection condition is destroyed, and the light is emitted from the light exit surface. Since the dot microstructure 15a cannot tolerate more light to refract, the angle at which the light is finally emitted is smaller than the total reflection, which causes the brightness and uniformity of the backlight module 1 to be poor. As shown in FIG. The dot micro-node 15b is a circular pit. Therefore, the light emitted by the light source 16 will increase its secondary refraction and increase the energy loss, so that the 3 M368806 ..... . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Light guide plate and backlight module with brightness and uniformity. [New content] The main purpose of the board creation is to provide a kind of backlight for the light source utilization, which can improve the utilization of light energy. It is to provide a module. The light-incident surface is configured to receive light and enter the light guide plate; a light-emitting surface is located on the upper surface of the light guide plate and adjacent to the light-incident surface; a bottom surface is opposite to the light-emitting surface, and at least one dot microstructure is The utility model is disposed on the bottom surface and has a cone-shaped central protrusion and an annular groove surrounding the central convex bottom. The present backlight module comprises a light guide plate having a light-incident surface for receiving the line and entering. a light guide plate, a light emitting surface, is located on the upper surface of the light guide plate and is adjacent to the front surface of the light guide plate, opposite to the light exit surface, and at least one dot microstructure, and the bottom surface of the light guide plate is provided, having a __ conical center The protrusion and the annular groove surround the bottom of the central protrusion; and a light source is adjacent to the light incident surface of the light guide plate. The novel features are believed to be detailed in the appended patent application. However, the novel structure The operation mode, the purpose, and the advantages, can be more easily understood by referring to the following description and the accompanying drawings. [Embodiment] As shown in FIG. 1 and FIG. 3, the present light guide plate 20 includes a light-incident surface 2]1. , a M368806 < The light-emitting surface 22 is located on the upper surface of the light guide plate 2A and adjacent to the light-incident surface 21, a bottom surface 23 is opposite to the light-emitting surface 22, and at least one dot microstructure 24 is disposed on the bottom surface 23. The present invention is characterized by a dot microstructure 24, having a conical central protrusion 25, and - an annular groove 26 surrounding the bottom of the central protrusion 25. The light emitted by the light source " the light surface 21 enters the light guide plate 20 and propagates internally according to the principle of total reflection, when When the light encounters the micro-structure 24, the direction of the light is changed, and the central protrusion 25 of the light or the annular groove 26 is guided to be emitted. Therefore, only the area where the dot microstructure 24 is distributed can emit light, which can be guided to the light that needs to be emitted. Position, and the light transmitted through the central protrusion 25 can refract the light, and the light guiding effect of the edge of the central protrusion 25 can reduce the secondary refraction of the light, reduce the energy consumption, and improve the light energy rate. The guide wire has better brightness and uniformity. In essence, the plurality of dot microstructures 24 can be arranged in different geometric shapes such as circles, rectangles or characters on the bottom surface 23 depending on the light exiting position of the light exit surface 22. As shown in FIG. 4, the backlight module 30' showing the application of the present light guide plate (Fig. 2 and Fig. 3) includes a light guide plate 2, a source called, which is -e.
，當光線碰到環形凹槽26的邊緣 直接反射並由導光板20之出光面 曹26的邊緣262直接穿透，並經反 5 M368806 射片32反射重新進入導光板20，而由屮虫工 田出先面22射出，如圖五 所示；當光線碰到圓錐狀中央凸起25 幻透緣251直接穿透，並 經反射片32反射重新進入導光板2〇， 叩田出光面22射出，如 圖六所示。 承上述，請參閱圖七所示，該導光板2〇的底面㈣有複數 網點微結構24,只有網點微結構24分佈的區域才有光線射出。 如圖八所示，冑光板20上的複數網點微結構24可依出光面Μ 的出光位置需求而在底面23做不同的幾何形狀排列，例如排列 成圓形24卜矩形242或文字243。該網點微結構24的排列密度 可與和入光面2丨的距離成[比，亦即距離人光面21越遠，排列 越密集。 方光模組3G可用來做為電腦' 手機或其它電子裝置的鍵盤 背光’讓使用者在黑暗的環境中也可以辨識鍵盤上的按鍵。導光 板20的網點微結構24可以配合按鍵的位置及要求透光的字元大 小及形狀做不同的幾何形狀排列，使光線只照亮需要背光的區 域，不需要月光的區域不會有光線射出，如此可提高光能利用率 及節省光源的成本。 雖然本創作之實施例已經說明於前，但是對於熟知此技藝之 人士而言’其他各種可輕易達成之變化或修改，皆不脫離本創 作之精神。在申請專利範圍内也試著涵蓋本創作精神範圍内之 所有變化或修改。 【圖式簡單說明】 M368806 圖-A、圖一B為習知背光模組之平面圖。 圖一、圖三為本創作導光板之背面立體圖、平面圖。 圖四為本創作背光模組之平面圖，其顯示光線碰到環形凹槽的谷 ，底之傳遞路徑。 圖五為本創作背光模組之平面圖，其顯示光線碰到環形凹槽的邊 緣之傳遞路徑。 圖/、為為本創作背光模組之平面圖，其顯示光線碰到圓錐狀中央 Φ 凸起的邊緣之傳遞路徑。 圖七為本創作背光模組的導光板底面設有複數網點微結構，其顯 不有網點微結構分佈的區域才有光線射出。 圖八為本創作導光板及背光模組的複數網點微結構可排列成圓 形、矩形或文字。 【主要元件符號說明】 (先前技術） 導光板11 入光面13 網點微結構（圓形凸點）15a 光源16 ®背光模組10 、 反射片12 .出光面14 網點微結構（圓形凹點）15b (本創作） 導光板20 入光面21 出光面22 底面23 圓形241 網點微結構24 7 M368806 矩形242 中央凸起25 環形凹槽26 背光模組30 反射片32 文字243 邊緣 251、262 谷底261 光源31When the light hits the edge of the annular groove 26, it is directly reflected and directly penetrates the edge 262 of the light-emitting surface 26 of the light guide plate 20, and is reflected by the anti-5 M368806 film 32 to re-enter the light guide plate 20, and is The first face 22 of the field is shot, as shown in Fig. 5; when the light hits the conical central protrusion 25, the phantom edge 251 directly penetrates, and is reflected by the reflection sheet 32 to re-enter the light guide plate 2, and the Putian light exit surface 22 is emitted. As shown in Figure 6. According to the above, as shown in FIG. 7, the bottom surface (4) of the light guide plate 2 has a plurality of dot microstructures 24, and only the area where the dot microstructures 24 are distributed is light. As shown in FIG. 8, the plurality of dot microstructures 24 on the calendering plate 20 can be arranged in different geometric shapes on the bottom surface 23 according to the light exiting position of the light exiting surface, for example, arranged in a circular shape 24 rectangle 242 or text 243. The arrangement density of the dot microstructures 24 can be made larger than the distance from the entrance face 2丨, that is, the further away from the human face 21, the denser the arrangement. The square light module 3G can be used as a keyboard backlight for a computer 'mobile phone or other electronic device' to allow the user to recognize the keys on the keyboard in a dark environment. The dot microstructure 24 of the light guide plate 20 can be arranged in different geometric shapes according to the position of the button and the size and shape of the characters required to be transmitted, so that the light only illuminates the area requiring backlight, and the area without the moonlight does not emit light. This can improve the utilization of light energy and save the cost of the light source. While the embodiments of the present invention have been described in the foregoing, various changes and modifications may be made without departing from the spirit of the invention. All changes or modifications within the scope of this creative spirit are also intended to be covered within the scope of the patent application. [Simple description of the drawing] M368806 Figure-A and Figure 1B are plan views of a conventional backlight module. Figure 1 and Figure 3 show the rear perspective view and plan view of the light guide plate. Figure 4 is a plan view of the backlight module of the present invention, showing the transmission path of the valley and the bottom of the annular groove. Figure 5 is a plan view of the backlight module of the present invention, showing the transmission path of light hitting the edge of the annular groove. Figure /, is a plan view of the creative backlight module, which shows the transmission path of the light hitting the edge of the conical central Φ protrusion. Figure 7 shows that the bottom surface of the light guide plate of the backlight module is provided with a plurality of dot micro-structures, and the light is emitted from the area where the dot structure is not distributed. Figure 8 shows that the complex dot microstructures of the light guide plate and the backlight module can be arranged in a circle, a rectangle or a text. [Major component symbol description] (Prior art) Light guide plate 11 Light-input surface 13 Dot microstructure (circular bump) 15a Light source 16 ® Backlight module 10, Reflector 12 . Light-emitting surface 14 Dot microstructure (circular pit) ) 15b (this creation) light guide plate 20 light-incident surface 21 light-emitting surface 22 bottom surface 23 circular 241 dot micro-structure 24 7 M368806 rectangle 242 central protrusion 25 annular groove 26 backlight module 30 reflective sheet 32 text 243 edge 251, 262 Valley bottom 261 light source 31