TW201600807A - Light guide plate and manufacturing method thereof - Google Patents
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Abstract
Description
本發明係關於一種導光板及其製造方法,特別關於一種用於背光模組的導光板及其製造方法。 The present invention relates to a light guide plate and a method of fabricating the same, and more particularly to a light guide plate for a backlight module and a method of fabricating the same.
由於液晶顯示器面板之液晶本身不具發光特性,因而為達到足夠亮度的顯示效果需給液晶顯示器面板提供一輔助光源,即所謂之背光模組。背光模組之作用係向液晶顯示器面板供應亮度充分且分佈均勻之面光源。目前,背光模組有直下式及側光式兩種,由於側光式背光模組更易於實現薄型化設計,在中小型電子產品中使用較為廣泛。 Since the liquid crystal of the liquid crystal display panel itself does not have the illuminating property, in order to achieve a sufficient brightness display effect, the liquid crystal display panel needs to be provided with an auxiliary light source, that is, a so-called backlight module. The function of the backlight module is to supply a surface light source with sufficient brightness and uniform distribution to the liquid crystal display panel. At present, the backlight module has two types: a direct type and a side light type. Since the edge type backlight module is easier to realize a thin design, it is widely used in small and medium-sized electronic products.
一種習知之側光式背光模組包括一光源及一導光板。該導光板包括一入光面、一與該入光面相連之出光面及一與該出光面相對之反射面。該入光面為導光板之一側面,該光源與入光面相鄰設置。該反射面上設置有複數網點,該光源所發出之光線藉由側邊之入光面進入該導光板內並經由底部之該反射面向上反射,而從該出光面射出,以提供面光源給上方之液晶面板。 A conventional edge-lit backlight module includes a light source and a light guide plate. The light guide plate includes a light incident surface, a light emitting surface connected to the light incident surface, and a reflective surface opposite to the light emitting surface. The light incident surface is a side surface of the light guide plate, and the light source is disposed adjacent to the light incident surface. a plurality of dots are disposed on the reflective surface, and the light emitted by the light source enters the light guide plate through the light incident surface of the side surface and is reflected upward through the reflective surface of the bottom portion, and is emitted from the light exit surface to provide a surface light source. The upper LCD panel.
如上所述,該導光板是利用全反射使光線可追跡至該導光板內各個位置,以達到將該光線傳送出去的效果,然而,該入光面通常係 一光滑的透明鏡面,其透光率較高,因此若鏡面加工產生微小傾角,在外部的平行光線由該鏡面垂直進入該導光板內後,雖大多數光線在入光後可利用該導光板反射面的印刷網點向上反射供光,但容易在該導光板某些邊緣產生光線不足之暗帶區域,因而對導光板的出光品質造成影響。 As described above, the light guide plate utilizes total reflection to trace light to various positions in the light guide plate to achieve the effect of transmitting the light. However, the light incident surface is usually A smooth transparent mirror has a high light transmittance. Therefore, if the mirror surface is processed to produce a slight tilt angle, after the external parallel light enters the light guide plate vertically from the mirror surface, most of the light can be used after entering the light. The printing dot of the reflecting surface reflects the light supply upward, but it is easy to generate a dark band region with insufficient light at some edges of the light guiding plate, thereby affecting the light-emitting quality of the light guiding plate.
故,有必要提供一種導光板及其製造方法,以解決上述習用技術所存在的問題。 Therefore, it is necessary to provide a light guide plate and a method of manufacturing the same to solve the problems of the above conventional techniques.
本發明之主要目的在於提供一種導光板,藉由形成入光銑切面,以避免如習知的入光面邊緣產生暗帶區域。 SUMMARY OF THE INVENTION A primary object of the present invention is to provide a light guide plate that is formed into an optical milling surface to avoid dark band regions as is known in the edge of the entrance surface.
本發明之另一目的在於提供一種導光板的製造方法,其對入光面進行銑切,以藉由形成與該出光面之間夾有一小於90度之夾角的銑切線,來改善該導光板的出光品質。 Another object of the present invention is to provide a method for manufacturing a light guide plate, which performs milling on a light incident surface to improve the light guide plate by forming a milling line with an angle of less than 90 degrees between the light exit surface. The quality of light.
為達上述之目的,本發明提供一種導光板,包括一出光面、一反射面、數個網點,及至少一入光銑切面,其中該反射面與該出光面相對;該等網點形成在該出光面及該反射面的其中之一;該入光銑切面的表面呈粗糙狀,且該入光銑切面的表面具有數條銑切線,每一該銑切線與該出光面之間夾有一小於90度之夾角。 In order to achieve the above objective, the present invention provides a light guide plate comprising a light emitting surface, a reflecting surface, a plurality of mesh points, and at least one light-input milling surface, wherein the reflecting surface is opposite to the light emitting surface; the dots are formed in the One of the light-emitting surface and the reflecting surface; the surface of the light-cut surface is rough, and the surface of the light-cut surface has a plurality of milling lines, and each of the milling lines and the light-emitting surface are smaller than The angle of 90 degrees.
在本發明之一實施例中,該入光銑切面的透光度為60%至90%。 In an embodiment of the invention, the light transmission milling surface has a transmittance of 60% to 90%.
在本發明之一實施例中,該入光銑切面的透光度為60%,及每一該網點的半徑為0.15公厘,且靠近該入光銑切面的該等網點具有0.14個/平方公厘之分佈密度。 In an embodiment of the invention, the light-transmitting and milling surface has a transmittance of 60%, and a radius of each of the dots is 0.15 mm, and the dots adjacent to the light-cut surface have 0.14/square. The distribution density of the metric.
在本發明之一實施例中,該入光銑切面的透光度為90%,及每一該網點的半徑為0.2公厘,且靠近該入光銑切面的該等網點具有0.12個/平方公厘之分佈密度。 In an embodiment of the invention, the light-transmitting and milling surface has a transmittance of 90%, and a radius of each of the dots is 0.2 mm, and the dots adjacent to the light-cut surface have 0.12/square. The distribution density of the metric.
在本發明之一實施例中,靠近該入光銑切面的該等網點的分佈密度小於遠離該入光銑切面的該等網點的分佈密度。 In an embodiment of the invention, the distribution densities of the dots adjacent to the optical milling face are smaller than the distribution densities of the mesh points away from the optical milling face.
在本發明之一實施例中,每一該銑切線與該出光面之間的夾角係介於30度至85度之間。 In an embodiment of the invention, the angle between each of the milling lines and the light exiting surface is between 30 degrees and 85 degrees.
在本發明之一實施例中,該等銑切線係平行且等距排列。 In one embodiment of the invention, the milling lines are parallel and equidistantly arranged.
為達上述之目的,本發明提供一種導光板的製造方法,該方法包含:提供一基板,該基板具有至少一位於側緣的加工部;利用一銑刀銑切去除該加工部,以形成至少一入光銑切面,該入光銑切面的表面呈粗糙狀,且該入光銑切面的表面具有數條銑切線,每一該銑切線與該出光面之間夾有一小於90度之夾角;及對該出光面及該反射面的其中之一進行油墨印刷,以形成數個網點。 In order to achieve the above object, the present invention provides a method of manufacturing a light guide plate, the method comprising: providing a substrate having at least one processing portion at a side edge; and cutting the processed portion by using a milling cutter to form at least a surface of the optical milling surface is rough, and the surface of the optical milling surface has a plurality of milling lines, and each of the milling lines and the light emitting surface has an angle of less than 90 degrees; And printing ink on one of the light emitting surface and the reflecting surface to form a plurality of dots.
在本發明之一實施例中,該基板為聚甲基丙烯酸甲酯(PMMA)所製成。 In one embodiment of the invention, the substrate is made of polymethyl methacrylate (PMMA).
在本發明之一實施例中,該油墨印刷之後,再對該等網點進行烘乾。 In an embodiment of the invention, after the ink is printed, the dots are dried.
如上所述,藉由銑刀銑切去除該加工部,使該導光板的入光銑切面形成有數條銑切線,每一該銑切線與該出光面之間夾有一小於90度之夾角,使該入光銑切面的透光率降低,且該入光銑切面可以使入射之平行光線經由該銑切線之粗糙微結構而散射成為多方向之柔光入光,因此 能有利避免如習知的入光面加工微小傾角易導致在某些邊緣產生暗帶區域之問題,進而能夠改善該導光板的出光品質。 As described above, the machining portion is removed by milling cutters, so that the light-cut surface of the light guide plate is formed with a plurality of milling lines, and each of the milling lines and the light-emitting surface has an angle of less than 90 degrees. The light transmittance of the light-cut surface is reduced, and the incident light-cut surface can scatter the incident parallel light into the multi-directional soft light through the rough microstructure of the milling line, so It can be advantageously avoided that the conventional dimming surface processing of a small dip angle tends to cause a problem of a dark band region at some edges, thereby improving the light-emitting quality of the light guide plate.
100‧‧‧導光板 100‧‧‧Light guide plate
2‧‧‧出光面 2‧‧‧Glossy surface
3‧‧‧反射面 3‧‧‧reflecting surface
4‧‧‧網點 4‧‧‧ outlets
5‧‧‧入光銑切面 5‧‧‧Into the light milling section
51‧‧‧銑切線 51‧‧‧ Milling and cutting line
a‧‧‧夾角 A‧‧‧ angle
第1圖是根據本發明一實施例之導光板的立體圖。 Fig. 1 is a perspective view of a light guide plate according to an embodiment of the present invention.
第2圖是根據本發明一實施例之導光板的局部視圖。 Fig. 2 is a partial view of a light guide plate according to an embodiment of the present invention.
第3圖是根據本發明一實施例之導光板的製造方法的示意圖。 Fig. 3 is a schematic view showing a method of manufacturing a light guide plate according to an embodiment of the present invention.
為了讓本發明之上述及其他目的、特徵、優點能更明顯易懂,下文將特舉本發明較佳實施例,並配合所附圖式,作詳細說明如下。再者,本發明所提到的方向用語,例如上、下、頂、底、前、後、左、右、內、外、側面、周圍、中央、水平、橫向、垂直、縱向、軸向、徑向、最上層或最下層等,僅是參考附加圖式的方向。因此,使用的方向用語是用以說明及理解本發明,而非用以限制本發明。 The above and other objects, features and advantages of the present invention will become more <RTIgt; Furthermore, the directional terms mentioned in the present invention, such as upper, lower, top, bottom, front, rear, left, right, inner, outer, side, surrounding, central, horizontal, horizontal, vertical, longitudinal, axial, Radial, uppermost or lowermost, etc., only refer to the direction of the additional schema. Therefore, the directional terminology used is for the purpose of illustration and understanding of the invention.
請參照第1、2圖所示,本發明一實施例之導光板100,用以與一光源(未繪示)相配合,並組裝在一背光模組(未繪示)中,該導光板100包括一出光面2、一反射面3、數個網點4,及至少一入光銑切面5,在本實施例中,該導光板100為矩形透明板,且該導光板100例如具有四個入光銑切面5,本發明將於下文詳細說明該導光板100各元件的細部構造、組裝關係及其運作原理。 As shown in the first and second embodiments, the light guide plate 100 of the embodiment of the present invention is matched with a light source (not shown) and assembled in a backlight module (not shown). The light guide plate 100 is a rectangular transparent plate, and the light guide plate 100 has four, for example, four light-emitting surfaces 2, a reflective surface 3, a plurality of mesh points 4, and at least one light-cut milling surface 5. In the light-cut milling surface 5, the detailed structure, assembly relationship and operation principle of each component of the light guide plate 100 will be described in detail below.
續參照第1、2圖所示,該導光板100可由聚甲基丙烯酸甲酯(PMMA,壓克力)、聚碳酸酯、聚苯乙烯,或苯乙烯-甲基丙烯酸甲酯共聚 物等材料注塑成型,且該反射面3與該出光面2相對。 Continuing with reference to Figures 1 and 2, the light guide plate 100 may be copolymerized with polymethyl methacrylate (PMMA, acrylic), polycarbonate, polystyrene, or styrene-methyl methacrylate. A material such as a material is injection molded, and the reflecting surface 3 is opposed to the light emitting surface 2.
續參照第1、2圖所示,該等網點4可形成在該出光面2及該 反射面3的其中之一,在本實施例中,該等網點4呈不規則分佈,且該網點4於越靠近該入光銑切面5之區域排列越疏散,越遠離該入光銑切面5之區域排列越密集,也就是說,靠近該入光銑切面5的該等網點4的分佈密度小於遠離該入光銑切面5的該等網點4的分佈密度。該等網點4是利用反射油墨印刷於該反射面3上,其中每一網點4大體呈部分球面凸起。另外,在其他實施例中,該等網點4也可採用化學蝕刻或雷射印刷,其成形方式並不以本實施例所局限。 Referring to Figures 1 and 2, the dots 4 can be formed on the light exit surface 2 and the One of the reflective surfaces 3, in the present embodiment, the mesh points 4 are irregularly distributed, and the mesh points 4 are more scattered in the region closer to the light-input milling surface 5, and the farther away from the light-cut milling surface 5 The denser the arrangement of the regions, that is to say, the distribution density of the dots 4 close to the incoming milling face 5 is smaller than the distribution density of the dots 4 remote from the incoming milling face 5. The dots 4 are printed on the reflecting surface 3 by means of reflective ink, wherein each dot 4 is substantially partially spherically convex. In addition, in other embodiments, the dots 4 may also be chemically etched or laser printed, and the manner of forming thereof is not limited by this embodiment.
續參照第1、2圖所示,該等入光銑切面5的表面呈粗糙狀, 且每一該入光銑切面5的表面具有數條銑切線51,且該等銑切線51係平行且等距排列,其中每一該銑切線51與該出光面2之間夾有一小於90度之夾角a,在本實施例中,夾角a為60度,但在其他較佳實施例中,每一該銑切線51與該出光面2之間的夾角係介於30度至85度之間。該等入光銑切面5的位置及數量係取決於側入式光源(如LED燈條)的設置位置及數量,因此該導光板100可具有一、二、三或四個入光銑切面5。該導光板100在未設有側入式光源的側面則可形成光滑的透明鏡面。 Referring to Figures 1 and 2, the surface of the light-cut surface 5 is rough. The surface of each of the optical cutting planes 5 has a plurality of milling lines 51, and the milling lines 51 are arranged in parallel and equidistantly, wherein each of the milling lines 51 and the light-emitting surface 2 are sandwiched by less than 90 degrees. In the present embodiment, the angle a is 60 degrees, but in other preferred embodiments, the angle between each of the milling lines 51 and the light exit surface 2 is between 30 degrees and 85 degrees. . The position and the number of the light-cut milling surfaces 5 depend on the position and the number of the side-entry light sources (such as LED light bars), so the light guide plate 100 can have one, two, three or four light-cut milling surfaces 5 . The light guide plate 100 can form a smooth transparent mirror surface on the side where the side-in type light source is not provided.
續參照第1、2圖所示該入光銑切面5較佳的透光度為60%至 90%。在本實施例中,該入光銑切面5較佳的透光度為60%,每一該網點的半徑為0.15公厘,且靠近該入光銑切面5的該等網點4具有0.14個/平方公厘之分佈密度。另外,在其他的實施例中,該入光銑切面5較佳的透光度也可為90%,每一該網點4的半徑為0.2公厘,且靠近該入光銑切面5的該等網點4具 有0.12個/平方公厘之分佈密度。 Referring to Figures 1 and 2, the light transmission milling surface 5 preferably has a transmittance of 60% to 90%. In the embodiment, the light-transmissive cutting surface 5 preferably has a transmittance of 60%, and the radius of each of the dots is 0.15 mm, and the dots 4 adjacent to the light-cut surface 5 have 0.14/ The distribution density of square millimeters. In addition, in other embodiments, the light transmission milling surface 5 preferably has a transmittance of 90%, and each of the dots 4 has a radius of 0.2 mm, and is adjacent to the light-cut milling surface 5. 4 points There is a distribution density of 0.12 / mm ^ 2 .
請參照第1至3圖所示,本發明一實施例之導光板的製造方 法主要包含下列步驟:(1)提供一基板100’,該基板100’具有至少一位於側緣的加工部101;(2)利用一銑刀(未繪示)銑切去除該加工部101,以形成如第2圖所示的至少一入光銑切面5,其中該入光銑切面5的表面呈粗糙狀,且該入光銑切面5的表面具有數條銑切線51,每一該銑切線51與該出光面2之間夾有一小於90度之夾角;(3)對該出光面2及該反射面3的其中之一進行反射油墨之印刷,以形成數個網點4;及(4)對該等網點4進行烘乾,以形成如第1圖所示的導光板100。 Please refer to FIGS. 1 to 3 for the manufacture of a light guide plate according to an embodiment of the present invention. The method mainly comprises the following steps: (1) providing a substrate 100' having at least one processing portion 101 at a side edge; (2) milling and removing the processing portion 101 by using a milling cutter (not shown), To form at least one light-cut surface 5 as shown in FIG. 2, wherein the surface of the light-cut surface 5 is rough, and the surface of the light-cut surface 5 has a plurality of milling lines 51, each of which is milled Between the tangential line 51 and the illuminating surface 2, an angle of less than 90 degrees is sandwiched; (3) printing of the reflective ink is performed on one of the illuminating surface 2 and the reflecting surface 3 to form a plurality of dots 4; and (4) The dots 4 are dried to form the light guide plate 100 as shown in Fig. 1.
如上所述,藉由該銑刀銑切去除該加工部101,使該導光板 100的入光銑切面5形成有數條銑切線51,每一該銑切線51與該出光面2之間夾有一小於90度之夾角,使該入光銑切面5的透光率降低,且該入光銑切面5可以使入射之平行光線經由該銑切線51之粗糙微結構而散射成為多方向之柔光入光,因此能有利避免如習知的入光面加工微小傾角易導致在某些邊緣產生暗帶區域之問題,進而能夠改善該導光板100的出光品質。 As described above, the processed portion 101 is removed by milling with the milling cutter to make the light guide plate The light-cut surface 5 of the 100 is formed with a plurality of milling lines 51, and each of the milling lines 51 and the light-emitting surface 2 are sandwiched by an angle of less than 90 degrees, so that the light transmittance of the light-cut milling surface 5 is lowered, and The light-cut surface 5 can scatter the incident parallel rays through the rough microstructure of the milling line 51 into a multi-directional soft light, thereby advantageously avoiding the slight inclination of the light-incident surface as in the prior art. The problem of the dark band area is generated at the edge, and the light quality of the light guide plate 100 can be improved.
雖然本發明已以較佳實施例揭露,然其並非用以限制本發明,任何熟習此項技藝之人士,在不脫離本發明之精神和範圍內,當可作各種更動與修飾,因此本發明之保護範圍當視後附之申請專利範圍所界定者為準。 The present invention has been disclosed in its preferred embodiments, and is not intended to limit the invention, and the present invention may be modified and modified without departing from the spirit and scope of the invention. The scope of protection is subject to the definition of the scope of the patent application.
100‧‧‧導光板 100‧‧‧Light guide plate
2‧‧‧出光面 2‧‧‧Glossy surface
3‧‧‧反射面 3‧‧‧reflecting surface
5‧‧‧入光銑切面 5‧‧‧Into the light milling section
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TW103122362A TWI554726B (en) | 2014-06-27 | 2014-06-27 | Light guide plate and manufacturing method thereof |
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TW556008B (en) * | 2001-08-01 | 2003-10-01 | Samsung Electronics Co Ltd | Light guided panel and liquid crystal display device using the same and method for displaying picture using the same |
JP4716754B2 (en) * | 2005-02-25 | 2011-07-06 | 三菱レイヨン株式会社 | Surface light source device, light guide used therefor, and manufacturing method thereof |
TWI367367B (en) * | 2007-06-26 | 2012-07-01 | Au Optronics Corp | Light guide plate with random-relationship micro structure |
CN101471192B (en) * | 2007-12-27 | 2011-04-06 | 比亚迪股份有限公司 | Press key structure and method for producing the same |
CN102681083B (en) * | 2012-05-03 | 2015-07-15 | 丹阳博昱科技有限公司 | Light guide plate with concave microstructure and manufacturing method thereof |
CN103197370B (en) * | 2013-04-07 | 2015-05-13 | 京东方科技集团股份有限公司 | Light guide plate manufacturing method |
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