201122667 六、發明說明： 【發明所屬之技術領域】 本發明係關於一種背光模組’特別是一種設有遮蔽層之 導光板之背光模組。 【先前技術】 目前背光模組之發光源大多為單_光源，例如：發光二 極體（LED)或冷陰極#光燈f (⑽L卜如果採用發光二極 體（LED)作為發光源可以提供比冷陰㈣光(CCFL)更 好的演色性，但是其輝度表現低於冷陰極螢光燈管 (CCFL)。因此，如果同時採用二者作為發光源，則可以提 供南輝度及向演色性。 參考圖1及圖2，分別顯示習知背光模組之剖視及俯視示 意圓。該背光模組1包括一導光板u、複數個冷陰極螢光 燈管（CCFL)12及複數個發光二極體（LED)13〇該導光板11 具有一出光面111、一底面112、二個侧面113、U4。該出 光面111係相對該底面112，該等側面^3、U4係位於該出 光面111及該底面112之間。該等冷陰極螢光燈管（CCFL)12 係面對該底面112，使得該等冷陰極螢光燈管（CCFL)丨2所 產生之光線經由該底面112進入該導光板該等發光二 極體（LED)13係面對該等側面113、114，使得該等發光二 極體（LED)13所產生之光線經由該等侧面113、n4進入該 導光板11。 該背光模組1之缺點如下，該等冷陰極螢光燈管 (CCFL)12及該等發光二極體（LED)13之光線並無法在該導 201122667 而會在該出光面111鄰近 光板11内完全均勻混合成白光 該 因 該等發光二極體（LED)13區域形成二個色差區域14，在 等色差區域14内之光線係為混光後不正常之偏紅白光。 此，該等色差區域14會影響該背光模組丨之表現。 因此，有'必要提供一創新且富進步性的設有冑蔽層之導 光板之背光模組’以解決上述問題。 【發明内容】201122667 VI. Description of the Invention: [Technical Field] The present invention relates to a backlight module', particularly a backlight module having a light shielding plate with a shielding layer. [Prior Art] At present, the illumination source of the backlight module is mostly a single light source, for example, a light emitting diode (LED) or a cold cathode # light lamp f ((10)Lb if a light emitting diode (LED) is used as a light source can provide Better color rendering than cold (four) light (CCFL), but its brightness is lower than that of cold cathode fluorescent tubes (CCFL). Therefore, if both are used as light sources, it can provide south brightness and color rendering. Referring to FIG. 1 and FIG. 2, respectively, a cross-sectional view and a top view circle of a conventional backlight module are shown. The backlight module 1 includes a light guide plate u, a plurality of cold cathode fluorescent lamp tubes (CCFL) 12, and a plurality of illuminations. The light guide plate 11 has a light-emitting surface 111, a bottom surface 112, two side surfaces 113, and U4. The light-emitting surface 111 is opposite to the bottom surface 112, and the side surfaces ^3 and U4 are located at the light-emitting surface. The cold cathode fluorescent lamp tube (CCFL) 12 faces the bottom surface 112 such that light generated by the cold cathode fluorescent lamp (CCFL) 丨 2 passes through the bottom surface 112. Entering the light guide plate, the light emitting diodes (LEDs) 13 face the sides 113, 114, The light generated by the light-emitting diodes (LEDs) 13 enters the light guide plate 11 through the sides 113 and n4. The disadvantages of the backlight module 1 are as follows, the cold cathode fluorescent tubes (CCFL) 12 and The light of the LEDs 13 cannot be completely uniformly mixed into the white light in the light-emitting surface 11 adjacent to the light-emitting surface 111. The light-emitting diodes (LEDs) 13 form two regions. In the color difference region 14, the light in the equal color difference region 14 is an abnormal reddish white light after the light mixing. Therefore, the color difference regions 14 affect the performance of the backlight module. Therefore, it is necessary to provide an innovation. A progressive backlight module with a conductive layer of a light guide plate to solve the above problem.
本發明係提供一種背光模組’其包括一導光板、至少一 第-光源、至少一第二光源及至少一遮蔽層。該導光板具 有-出光面、-底面及至少一側面。該至少一第一光源係 面對該底面，使得該至少一第一光源所產生之光線經由該 底面進入該導光板《該至少一第二光源係面對該至少一侧 面，使得該至少一第二光源所產生之光線經由該至少一側 面進入該導光板。該至少一遮蔽層係設置於該導光板之至 少一側面之一部分，用以阻隔該至少一第二光源所產生之 部分光線進入該導光板。 在該背光模組中，由於該至少一遮蔽層可以阻隔該至少 一第二光源所產生之部分光線進入該導光板，進而可以降 低該至少一第一光源及該至少一第二光源之光線在該導光 板内混光後出現局部偏紅白光之色差情況，因此可在該導 光板内得到較均勻混合之白光，提高該背光模組之表現。 【實施方式】 參考圖3 ’顯示本發明背光模組之第一實施例之剖視示 意圖。該背光模組2包括一導光板21、至少一第一光源 m -4 · 201122667 22、至少一第一光源23及至少一遮蔽層24。 該導光板21具有一出光面211、一底面212及至少一側 面。在本實施例申，該至少—側面係為二個側面2丨3、 214。該出光面211係相對該底面2丨2，該等側面2丨3、2 J 4 係設置於該出光面211及該底面2丨2之間。 該至少一第一光源22係面對該底面2 12，使得該至少一 第一光源22所產生之光線經由該底面212進入該導光板 21。該至少一第二光源23係面對該至少一側面2 13、214， 使得δ亥至少一第二光源23所產生之光線經由該至少一側面 213、214進入該導光板21。在本實施例中，該至少一第一 光源22係為複數個冷陰極螢光燈管（CCFL)，其與該底面 212間隔一間距，且該至少一第二光源23係為複數個發光 二極體（LED)。 該至少一遮蔽層24係設置於該導光板21之至少一側面 213、214之一部分，用以阻隔該至少一第二光源23所產生 之部分光線進入該導光板21。 在本實施例中，該至少一遮蔽層24之材質包括但不限於 以下三種。 第一、該至少一遮蔽層24係為一反射層，用以反射該至 少一第二光源23所產生之部分光線。該反射層可以是一反 射膜，其係塗佈於該至少一側面213、214 ^或者，該反射 層可以是一反射片’其係貼附於該至少一側面213、214。 第一、該至少一遮蔽層24係為一半穿透層，其穿透率係 可介於30%〜1〇〇%之間。 [S3 201122667 第三、該至少一遮蔽層24之反射率可小於5%，且穿透 率可小於10%。較佳地，該遮蔽層之材質可為塗料、顏料 或油墨’更佳地前述為黑色之塗料、顏料或油墨。此外， 該遮蔽層亦可以複數個點狀結構方式形成於導光板之益少 一側面上。 參考圖4 ’顯示圖3之導光板之側視示意圖。如圖所示， 每一遮蔽層24之面積係為側面213之面積之三分之一至二 分之一。或者，每一遮蔽層24之高度112係為側面213之高 度Hi之三分之一至二分之一。 較佳地，該至少一遮蔽層24係設置於該側面213之下半 部。更佳地’該底面212及該側面213係相交於一交線，該 至少一遮蔽層24之底端241係與該交線切齊。 在該背光模組2中，由於該至少一遮蔽層24可以阻隔該 至少一第二光源23所產生之部分光線進入該導光板21，進 而可以降低該至少一第一光源22及該至少一第二光源23之 光線在該導光板21内混光後出現局部偏紅白光之色差情 況，因此可在該導光板21内得到較均勻混合之白光提高 該背光模組2之表現。 參考圖5，顯示本發明背光模組之第二實施例之剖視示 意圖。該背光模組3包括一導光板31、至少一第一光源 32、至少一第二光源33及至少一遮蔽層34。 該導光板31具有—丨光面311、—底面312及二個側面 m 311該底面312具有至少一開槽35，用以容置該至 )第一光源32，該至少一開槽35之側壁係為該底面3 12 m • 6 - 201122667 之一部分。 該至少一第一光源32係面對該底面3 12，該至少一第二 光源3 3係面對該等側面313、3 14。在本實施例中，該至少 一第一光源32係為複數個冷陰極螢光燈管（CCFL)，該至少 一第二光源3 3係為複數個發光二極體（LED)。 該至少一遮蔽層34係設置於該導光板31之至少一側面 3 13、3 14之一部分，用以阻隔該至少一第二光源33所產生 之部分光線進入該導光板3 1。 參考圖ό，顯示本發明背光模組之第三實施例之剖視示 意圖。該背光模組4包括一導光板41、至少一第一光源 42、至少一第二光源43及至少一遮蔽層44。 該導光板41具有一出光面411、一底面412及二個側面 413、414 »該至少一第一光源42係面對該底面412，該至 少一第二光源43係面對該等側面413、414。在本實施例 中，該至少一第一光源42係為複數個發光二極體（led)， 該至少一第二光源43亦為複數個發光二極體（Led)。 該至少一遮蔽層44係設置於該導光板41之至少一側面 413、414之一部分，用以阻隔該至少一第二光源43所產生 之部分光線進入該導光板41。 此外，補充說明的是，本發明遮蔽層可具有複數個微 結構，而具有複數個微結構（圖未示）之遮蔽層，其穿透率 係可介於30%〜100%之間。而該些微結構可與導光板之至 少一側面一體成型，如採用射出成型、押出成型、壓製成 型、滾壓成型方式…等。此外，亦可在導光板之至少一側 201122667 面以喷妙製程、雷射製程等方式將微結構形成於導光板 ’’側面上。關於微結構的形成方式，並不以上述為 舉凡可在膜片上形成微結構之方式，皆可應用於本發 明背光模組之導光板上。 上述實施例僅為說明本發明之原理及其功效並非限制 本發β ϋ在匕習於此技術之人士對上述實施例進行修改及 變化仍不脫本發明之精神。本發明之權利範圍應如後述之 申晴專利範圍所列。 【圖式簡單說明】 圖1顯示習知背光模組之剖視示意圖； 圖2顯示習知背光模組之俯視示意圖； 圖3顯示本發明背光模組之第一實施例之剖視示意圖； 圖4顯示圖3之導光板之側視示意圖； 圖5顯示本發明背光模組之第二實施例之剖視示意 圖；及 ’ 圖6顯示本發明背光模組之第三實施例之剖視示意圖。 【主要元件符號說明】 1 習知背光模組 2 4 11 12 本發明第一實施例之背光模組 本發明第二實施例之背光模組 本發明第三實施例之背光模組 導光板 冷陰極螢光燈管 發光二極體 13 201122667The present invention provides a backlight module that includes a light guide plate, at least one first light source, at least one second light source, and at least one shielding layer. The light guide plate has a light exiting surface, a bottom surface and at least one side surface. The at least one first light source faces the bottom surface, such that the light generated by the at least one first light source enters the light guide plate through the bottom surface. The at least one second light source body faces the at least one side surface, so that the at least one The light generated by the two light sources enters the light guide plate via the at least one side. The at least one shielding layer is disposed on a portion of at least one side of the light guide plate to block a portion of the light generated by the at least one second light source from entering the light guide plate. In the backlight module, the at least one shielding layer can block a portion of the light generated by the at least one second light source from entering the light guide plate, thereby reducing the light of the at least one first light source and the at least one second light source. After the light is mixed in the light guide plate, the chromatic aberration of the partial reddish white light occurs, so that a relatively uniform mixed white light can be obtained in the light guide plate, thereby improving the performance of the backlight module. [Embodiment] Referring to Fig. 3', there is shown a cross-sectional view of a first embodiment of a backlight module of the present invention. The backlight module 2 includes a light guide plate 21, at least one first light source m -4 · 201122667 22, at least one first light source 23 and at least one shielding layer 24. The light guide plate 21 has a light exit surface 211, a bottom surface 212, and at least one side surface. In this embodiment, the at least one side is the two sides 2丨3, 214. The light-emitting surface 211 is opposite to the bottom surface 2丨2, and the side surfaces 2丨3 and 2J4 are disposed between the light-emitting surface 211 and the bottom surface 2丨2. The at least one first light source 22 faces the bottom surface 2 12 such that light generated by the at least one first light source 22 enters the light guide plate 21 via the bottom surface 212. The at least one second light source 23 faces the at least one side surface 2 13 , 214 such that light generated by the at least one second light source 23 enters the light guide plate 21 via the at least one side surface 213 , 214 . In this embodiment, the at least one first light source 22 is a plurality of cold cathode fluorescent lamps (CCFLs) spaced apart from the bottom surface 212 by a distance, and the at least one second light source 23 is a plurality of light emitting diodes Polar body (LED). The at least one shielding layer 24 is disposed on a portion of the at least one side surface 213, 214 of the light guide plate 21 for blocking a portion of the light generated by the at least one second light source 23 from entering the light guide plate 21. In this embodiment, the material of the at least one shielding layer 24 includes but is not limited to the following three. First, the at least one shielding layer 24 is a reflective layer for reflecting a portion of the light generated by the at least one second light source 23. The reflective layer can be a reflective film applied to the at least one side 213, 214. Alternatively, the reflective layer can be a reflective sheet attached to the at least one side 213, 214. First, the at least one shielding layer 24 is a semi-transparent layer, and the transmittance may be between 30% and 1%. [S3 201122667 Third, the at least one shielding layer 24 may have a reflectance of less than 5% and a transmittance of less than 10%. Preferably, the material of the masking layer can be a paint, a pigment or an ink. More preferably, the foregoing black paint, pigment or ink. In addition, the shielding layer may be formed on the side of the light guide plate in a plurality of dot structures. Referring to Figure 4', a side view of the light guide of Figure 3 is shown. As shown, each of the obscuring layers 24 has an area that is one-third to one-half the area of the side 213. Alternatively, the height 112 of each of the masking layers 24 is one-third to one-half of the height Hi of the side surface 213. Preferably, the at least one shielding layer 24 is disposed on the lower half of the side surface 213. More preferably, the bottom surface 212 and the side surface 213 intersect at an intersection line, and the bottom end 241 of the at least one shielding layer 24 is aligned with the intersection line. In the backlight module 2, the at least one shielding layer 24 can block a portion of the light generated by the at least one second light source 23 from entering the light guide plate 21, thereby reducing the at least one first light source 22 and the at least one first When the light of the two light sources 23 is mixed in the light guide plate 21, the chromatic aberration of the partial reddish white light occurs, so that a relatively uniform mixed white light can be obtained in the light guide plate 21 to improve the performance of the backlight module 2. Referring to Figure 5, there is shown a cross-sectional view of a second embodiment of a backlight module of the present invention. The backlight module 3 includes a light guide plate 31, at least one first light source 32, at least one second light source 33, and at least one shielding layer 34. The light guide plate 31 has a light-emitting surface 311, a bottom surface 312, and two side surfaces m 311. The bottom surface 312 has at least one slot 35 for receiving the first light source 32, and the sidewall of the at least one slot 35. It is part of the bottom surface 3 12 m • 6 - 201122667. The at least one first light source 32 faces the bottom surface 312, and the at least one second light source 33 faces the sides 313, 314. In this embodiment, the at least one first light source 32 is a plurality of cold cathode fluorescent lamps (CCFLs), and the at least one second light source 33 is a plurality of light emitting diodes (LEDs). The at least one shielding layer 34 is disposed on a portion of the at least one side surface 3 13 , 314 of the light guide plate 31 for blocking a portion of the light generated by the at least one second light source 33 from entering the light guide plate 31 . Referring to the drawings, there is shown a cross-sectional view of a third embodiment of the backlight module of the present invention. The backlight module 4 includes a light guide plate 41, at least one first light source 42, at least one second light source 43, and at least one shielding layer 44. The light guide plate 41 has a light emitting surface 411, a bottom surface 412 and two side surfaces 413, 414. The at least one first light source 42 faces the bottom surface 412, and the at least one second light source 43 faces the side surfaces 413. 414. In this embodiment, the at least one first light source 42 is a plurality of light emitting diodes (LEDs), and the at least one second light source 43 is also a plurality of light emitting diodes (Led). The at least one shielding layer 44 is disposed on a portion of the at least one side surface 413, 414 of the light guide plate 41 for blocking a portion of the light generated by the at least one second light source 43 from entering the light guide plate 41. In addition, it is to be noted that the shielding layer of the present invention may have a plurality of microstructures, and the shielding layer having a plurality of microstructures (not shown) may have a transmittance of between 30% and 100%. The microstructures may be integrally formed with at least one side of the light guide plate, such as injection molding, extrusion molding, press molding, roll forming, and the like. In addition, the microstructure may be formed on the side of the light guide plate ’’ by means of a spray process or a laser process on at least one side of the light guide plate 201122667. Regarding the manner in which the microstructure is formed, it is not applicable to the above-described manner in which the microstructure can be formed on the diaphragm, and can be applied to the light guide plate of the backlight module of the present invention. The above-described embodiments are merely illustrative of the principles of the present invention and the advantages thereof. The modifications and variations of the above-described embodiments will be apparent to those skilled in the art. The scope of the invention should be as set forth in the scope of the Shenqing patent as described later. BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a cross-sectional view showing a conventional backlight module; FIG. 2 is a schematic cross-sectional view showing a conventional backlight module; FIG. 3 is a cross-sectional view showing a first embodiment of the backlight module of the present invention; 4 is a side view showing a light guide plate of FIG. 3; FIG. 5 is a cross-sectional view showing a second embodiment of the backlight module of the present invention; and FIG. 6 is a cross-sectional view showing a third embodiment of the backlight module of the present invention. [Main component symbol description] 1 conventional backlight module 2 4 11 12 backlight module of the first embodiment of the present invention, backlight module of the second embodiment of the present invention, backlight module light guide plate cold cathode of the third embodiment of the present invention Fluorescent tube light emitting diode 13 201122667
14 色差區域 21 導光板 22 第一光源 23 第二光源 24 遮蔽層 31 導光板 32 第一光源 33 第二光源 34 遮蔽層 35 開槽 41 導光板 42 第一光源 43 第二光源 44 遮蔽層 111 出光面 112 底面 113 側面 114 側面 211 出光面 212 底面 213 側面 214 側面 241 遮蔽層之底端 311 出光面 201122667 312 底面 313 側面 314 側面 411 出光面 412 底面 413 側面 414 側面14 color difference area 21 light guide plate 22 first light source 23 second light source 24 shielding layer 31 light guide plate 32 first light source 33 second light source 34 shielding layer 35 slot 41 light guide plate 42 first light source 43 second light source 44 shielding layer 111 light Face 112 bottom surface 113 side surface 114 side surface 211 light-emitting surface 212 bottom surface 213 side surface 214 side surface 241 bottom layer 311 of the shielding layer light-emitting surface 201122667 312 bottom surface 313 side surface 314 side surface 411 light-emitting surface 412 bottom surface 413 side surface 414 side