1277806 • 1 九、發明說明： 【發明所屬之技術領域】 此“本卷月係關於液晶顯示裝置，更詳細來說是關於一種 2光單元之導光板’藉由在液晶顯示裝置之背光單元之導 光板上下部表面形成構造物，不須另行安裝稜鏡片，即可 提高光線的亮度及均一性。 【先前技術】 此=晶顯示裝置（IXD)，因本身不會發光，所以需要 •背光單元來做為面光源之供應裝置。背光單元之導光板， f用來隸光源#出的紐呈均一亮度分布均等地到達液 曰曰頜不扃置。也就是說，導光板的功能，係將侧面、背面 的點光源或線光源切換成面光源型態。 導光板是由丙烯酸樹脂等之透明光學用樹脂所製成， 而且，藉由形成於表面之光線散射及反射用的各種圖案， 使射入導光板内部的光線朝向外部射出。導光板表面的圖 案，是以利用光散射油墨之網版印刷法來形成，但在最近 也有在模具上直接加工圖案而進行射出成形的方法。 圖1 ’係表示使用習知技術的導光板之液晶顯示裝置 背光單元的構造概略圖。 • 使用習知技術之液晶顯示裝置的背光單元包含：光源 2、反射片3、導光板9、擴散板4、稜鏡片5a、5b、以及 保護板6等。 光源2，是安裝在導光板9的側面，並且，反射體7 疋配置在光源2的後面。光源2的光線，是直接射入、或 1277806 經由反射體7的反射來射人導光板9的側面。 經2光板9的下部形成之圖案（未圖示）散射後的 =二有-定的方向性，而是以各種角度任意反射，並 朝導光板9的外部射出。 ,, //Λ ^ ^ 因此，必須要在導光板9上裝設 ，使^案部位散射後的光料等擴散至面全體的擴散板 ，為了使從各種角度分散射出的光線會聚在垂直於該 =’正面方向’並且從正面視時增加面亮度，須裝設稜鏡 於導光板9上。但是，這些板片等屬高單價，可 此會w製造成本的提高或製程的複雜化。 在取近’試著在導光板的上側面將稜鏡片做成一體， 來減少所需稜鏡片的數量，基於其構造上的限制，必須在 導光板上另行安裝稜鏡片’也因此依然存在著成本高等的 問題點。 【發明内容】 本發明，係銮於前述問題等而構成，其目的在於提供 -種背光單元之導光板，藉由在上下表面形成微細構造 物’不須另行安裝其他的稜鏡片’即可提高光線的亮度及 均一性。 本發明之另一目的是提供一種背光單元之導光板，為 取代用來擴散光線以及聚光所安裝的稜鏡片及擴散板，而 在表面形成微細構造物。 為達前述目的，本發明之背光單元之導光板。是由透 光性材質構成，在下部面具備一構造物之透鏡部，且在上 部面具備與另一構造物之聚光部。 1277806 背光單元之導光板，係安裝於液晶顯示裝置背後，用 來將從光源射入的光線導向液晶顯示裝置，該導光板由透 光性材質的板狀材料構成，並具備：透鏡部，由在導光板 下部面之複數個溝槽構成，用來使從—側面射人的光線散 並會聚至既定方向；以及聚光部’由突出於導光板上 部面之複數個呈多面體立體形狀之立體突起部所構成，用 來將經該透鏡部散射後的光線朝上側方向聚光。 又，透鏡部係在前述導光板的下部面，以朝光線入射 面的大致平行方向延伸的方式，形成截面為半圓形 個溝槽。 具備複數個微細散射溝槽 另外，在透鏡部的表面上 來使光線散射。 另外，立體突起部係呈上㈣角被平直士刀斷之四角錐型。 更進步，6亥導光板，其光線入射方向的截面呈楼型。 幻較佳為，背光單元之導光板，係安裝於液晶顯示裝置 鲁背後，用來將從光源射入的光線導向液晶顯示裝置，該導 光，由透光性材貝的板狀材料構成，並具備：透鏡部，係 ‘光板❸下φ ,以帛光線入射面的大致平行方向延伸 的方式，形成截面為半圓形之複數個突起，用來使從一側 面射入的光線散射，並會聚至既定方向；以及聚光部，由 凹設於導光板的上部面、内壁部呈傾斜之多角形的溝槽部 所構成，用纟將經該透鏡部散射後的光線朝上側方向聚 係安裝於液晶顯示裝置 更佳為，背光單元之導光板 1277806 » » 背後’用來將從位於侧面之光源射入的光線導向液晶顯示 裝置，該導光板由透光性材質的板狀材料構成，並具備： 透鏡部’係在導光板的下部面，以朝光線入射面的大致平 行方向延伸的方式’形成複數個溝槽或突起，用來使從射 入的光線散射並會聚至既定方向；以及聚光部，由突出於 導光板上部面之複數個呈多面體立體形狀之立體突起部所 構成，用來將經s亥透鏡部散射後的光線朝上側方向聚光。 #前述般，依據本發明的背光單元之導光板，藉由該 •導光板上下表面所形成之構造物等，即使沒有另行設置棱 鏡片情況下，也能夠提高光線的亮度及均一性。 另外，以本發明的背光單元之導光板上設置的透鏡部 及聚光部等的微細構造物，來替代習知技術之裝設於導光 板上的稜鏡片、擴散板，不但能達到製程的單純化，而且 也有降低成本的效果。 【實施方式】 以下，藉著所附圖式之實施例等，來詳述本發明的背 光單元之導光板的構成及作用。 圖2，係本發明第丨實施例之導光板的側視圖。圖3， 係本赉明第1貫施例之導光板的立體圖。圖4，係從圖2 所不之導光板底部視之立體圖。 本發明第1貫施例的背光單元之導光板1 〇，是安裝於 液晶顯不裝置背後，用來將從光源射入的光線導向液晶顯 示裝置。 導光板1 0 ’是由丙烯酸樹脂等之透明光學用樹脂板狀 I277806 枒所製成。如圖示般’導光板i〇的側截面形狀，沿著光 源的入射方向’使其形成厚度逐漸縮小的楔形是理想的。 亦可製作成一定厚度的平板狀。1277806 • 1 IX. Description of the invention: [Technical field to which the invention pertains] This "this volume is related to a liquid crystal display device, and more particularly to a light guide plate of 2 light units" by a backlight unit of a liquid crystal display device The structure is formed on the lower surface of the light guide plate, and the brightness and uniformity of the light can be improved without separately installing the cymbal. [Prior Art] This = crystal display device (LCD), since it does not emit light itself, it is necessary to • backlight unit As a supply device for the surface light source, the light guide plate of the backlight unit, f is used for the uniform light intensity distribution of the light source to reach the liquid jaw and the jaw is not disposed. That is, the function of the light guide plate will be The point source or the line source on the side and the back side are switched to the surface light source type. The light guide plate is made of a transparent optical resin such as acrylic resin, and is formed by various patterns for scattering and reflecting light formed on the surface. The light that enters the inside of the light guide plate is emitted toward the outside. The pattern on the surface of the light guide plate is formed by screen printing using light scattering ink, but recently there are also A method of directly forming a pattern on a mold to perform injection molding. Fig. 1 is a schematic view showing a configuration of a backlight unit of a liquid crystal display device using a light guide plate of the prior art. • A backlight unit using a conventional liquid crystal display device includes: a light source 2. The reflection sheet 3, the light guide plate 9, the diffusion plate 4, the cymbals 5a, 5b, and the protection plate 6, etc. The light source 2 is mounted on the side of the light guide plate 9, and the reflector 7 is disposed behind the light source 2. The light source of the light source 2 is directly incident on the side surface of the light guide plate 9 by the reflection of the reflector 7 through the reflector 7. The pattern formed by the lower portion of the second light plate 9 (not shown) is scattered. The directionality is arbitrarily reflected at various angles and is emitted toward the outside of the light guide plate 9. ,, Λ ^ ^ Therefore, it is necessary to install on the light guide plate 9 to scatter the light material after the project portion. The diffusing plate diffused to the entire surface is arranged to be attached to the light guide plate 9 in order to converge the light scattered from various angles in a direction perpendicular to the 'front direction' and to increase the surface brightness from the front side. Genus The unit price can be increased by the manufacturing cost or the complexity of the process. In the near approach, try to integrate the cymbals on the upper side of the light guide plate to reduce the number of required cymbals, based on its structural limitations. The present invention is not limited to the above-mentioned problem, and the object of the present invention is to provide a light guide plate of a backlight unit. By forming a fine structure on the upper and lower surfaces, the brightness and uniformity of the light can be improved without separately installing other cymbals. Another object of the present invention is to provide a light guide plate of a backlight unit, which is used instead of diffusing light. And a ruthenium plate and a diffusion plate to which the light is attached, and a fine structure is formed on the surface. To achieve the above object, the light guide plate of the backlight unit of the present invention. It is made of a light-transmitting material, and has a lens portion having a structure on the lower surface, and a condensing portion with another structure on the upper surface. 1277806 The light guide plate of the backlight unit is mounted on the back of the liquid crystal display device for guiding the light incident from the light source to the liquid crystal display device. The light guide plate is made of a light-transmissive plate material and has a lens portion. a plurality of grooves on the lower surface of the light guide plate are configured to disperse and converge the light from the side surface to a predetermined direction; and the concentrating portion is formed by a plurality of polyhedral three-dimensional shapes protruding from the surface of the light guide plate The protrusion is configured to condense light scattered by the lens portion toward the upper side. Further, the lens portion is formed on a lower surface of the light guide plate so as to have a semicircular groove in a cross section so as to extend in a substantially parallel direction of the light incident surface. A plurality of fine scattering grooves are provided, and light is scattered on the surface of the lens portion. In addition, the three-dimensional protrusion portion is a quadrangular pyramid type in which the upper (four) corner is broken by a straight knife. More advanced, 6-inch light guide plate, the cross section of the light incident direction is a building type. Preferably, the light guide plate of the backlight unit is mounted on the back of the liquid crystal display device for guiding the light incident from the light source to the liquid crystal display device, and the light guide is composed of a plate material of the light-transmitting material shell. And having a lens portion, which is a light plate ❸ φ, extending in a substantially parallel direction of the ray light incident surface, forming a plurality of protrusions having a semicircular cross section for scattering light rays incident from one side, and Converging to a predetermined direction; and the concentrating portion is formed by a groove portion recessed in an upper surface of the light guide plate and having an inclined inner polygonal portion, and the light scattered by the lens portion is collected toward the upper side Preferably, the liquid crystal display device is mounted on the light guide plate of the backlight unit 1277806 » » the back surface is used for guiding the light incident from the light source located on the side to the liquid crystal display device, and the light guide plate is made of a light-transmissive plate material. And having: the lens portion 'being on the lower surface of the light guide plate, forming a plurality of grooves or protrusions in a manner extending in a substantially parallel direction of the light incident surface for dispersing the incident light And condensed to the predetermined direction; and a condensing unit, a plurality of projections on an upper surface of the light guide plate of a three-dimensional stereoscopic shape of a polyhedral protrusions formed, the light to the s-Hai lens portion condensing the scattering direction of the upper side. As described above, according to the light guide plate of the backlight unit of the present invention, the structure and the like formed on the lower surface of the light guide plate can improve the brightness and uniformity of the light even if the prism lens is not separately provided. Further, in place of the fine structure such as the lens portion and the condensing portion provided on the light guide plate of the backlight unit of the present invention, instead of the cymbal sheet and the diffusion plate mounted on the light guide plate of the prior art, not only the process can be achieved. Simplified, but also has the effect of reducing costs. [Embodiment] Hereinafter, the configuration and operation of a light guide plate of a backlight unit of the present invention will be described in detail by way of embodiments of the drawings. Figure 2 is a side elevational view of a light guide plate in accordance with a third embodiment of the present invention. Fig. 3 is a perspective view of a light guide plate according to a first embodiment of the present invention. Figure 4 is a perspective view from the bottom of the light guide plate of Figure 2. The light guide plate 1 of the backlight unit of the first embodiment of the present invention is mounted on the back of the liquid crystal display device and is used to guide the light incident from the light source to the liquid crystal display device. The light guide plate 10' is made of a transparent optical resin plate shape I277806 such as an acrylic resin. As shown in the figure, the side cross-sectional shape of the light guide plate i , is ideally formed along the incident direction of the light source to form a wedge shape whose thickness is gradually reduced. It can also be made into a flat shape with a certain thickness.
取"導光板1G的上部面，是具備由立體突起部⑵構成之 ^光。卩12’且在該下部面具備透鏡部u。因此，透鏡部I!， 是用來使從位於導光板1G側面的光源所射人的光線散射， ，能有效會聚至㈣方向，並且，聚光部12 ^經透鏡 邻11散射後的光線朝上側方向聚光。 前述透鏡部u，是由導光板10的下部面之㈣_ 槽11a構成。構成透鏡部η之溝槽lla，以朝光線入射面 的大致平行方向延伸的方式’形成半圓狀的截面。另外， 透鏡部11是被加工成一定粗細，且在表面上具備複數個 將光線散射的微細散射溝槽13。 立體突起部12a，是呈上側角被平直切斷之四角錐型 的立體形狀，並突出於導光板10上部面。 接下來說明’包含前述構成的導光板1〇之背光單元的 運作。 圖5，係顯示具備本發明第丨實施例的導光板之背光 單元的分解狀態。以下，在說明導光板1〇之各個面時， 將與光源2接觸的側面部稱為入射面14，將上部面稱為出 光面15，將下部面稱為底面。 在導光板10的侧面，言曼置熱陰極榮光燈或冷陰極榮光 燈等之光源2、以及反射體7;光源2的光線，是直接、 或經反射體7反射而射入導光板1〇侧面的入射面14。在 I277806 用來將朝下側方向的光 導光板1 〇的下部面設置反射片3 線往上反射。 經由導光板U)側面的人射面14所射人的光線，透過 板10之透鏡部U進行散射。如前述般，透鏡部U 2面是具備微細散射溝槽13，所以能高效率進行光線的 :射。經透鏡冑U散射後的光線，一部分會被上側的出 _ = 15朝下反射’—部分透過出光面15朝上側之液晶顯 不裝置19的方向射出。朝下反射的光線，是在出光面Η 與透鏡部1 1間不斷進行反射。 朝導光板10之出光面15射出的光線，透過立體突起 部⑶朝垂直方向折射後聚光。亦即，在以往，藉由在導 光板上侧相互交又安裝擴散片與兩個稜鏡片，可將從出光 面射出的光線散射並聚光，但本發明中，導光板上侧之立 體突起部i2a可以替代前述之各種板片，達到相同的功能。 圖6,係本發明第2實施例之導光板的立體圖。 本發明第2實施例之導光板的各構成要素是與第丨實 施例相同，但構成聚光部22之立體突起部山的形狀有： 差異。在第2實施例中之導光板2(^上部面所形成的立 體突起部22a，係呈上側角被平直切斷之六角錐型。 圖7,係本發明第3實施例之導光板的側視圖。 本發明第3實施例之導光板30的下部面之透鏡部31 , 以朝光線入射面的大致平行方向延伸的方式， 半圓形之複數個突起3U。另外，透鏡部31，=， 實施例般’被加工成一定粗㈣，且纟其表面上形成複數個 1277806 將光線散射的微細散射溝槽（未圖示 部面’具備能將從透鏡部31 之聚光部32。聚光部32， 、内壁面32b呈傾斜之多角 另外，在導光板3 0的上 散射後的光線朝上側方向聚光 由凹設於導光板30的上部面 形溝槽部32a所構成是理想的 具備述第2貫施例鱼繁^杳左 只四巧，、弟3貫施例之導光板2〇、3〇的 液晶顯示裝置之背光單元的運作 堤作狀也因與弟1實施例類 似，所以在此不再贅述。 、The upper surface of the light guide plate 1G is provided with light composed of the three-dimensional protrusions (2).卩12' and a lens portion u is provided on the lower surface. Therefore, the lens portion I! is used to scatter the light emitted from the light source located on the side of the light guide plate 1G, and can be effectively concentrated in the (four) direction, and the light condensed by the concentrating portion 12 through the lens adjacent 11 Concentrate in the upper direction. The lens portion u is composed of a (four)-slot 11a of a lower surface of the light guide plate 10. The groove 11a constituting the lens portion η forms a semicircular cross section so as to extend in a substantially parallel direction of the light incident surface. Further, the lens portion 11 is processed to have a constant thickness, and has a plurality of fine scattering grooves 13 for scattering light on the surface. The three-dimensional projection 12a has a rectangular shape of a quadrangular pyramid shape in which the upper corner is cut straight, and protrudes from the upper surface of the light guide plate 10. Next, the operation of the backlight unit including the light guide plate 1 of the above configuration will be explained. Fig. 5 is a view showing an exploded state of a backlight unit having a light guide plate according to a third embodiment of the present invention. Hereinafter, when describing the respective surfaces of the light guide plate 1B, the side surface portion that is in contact with the light source 2 will be referred to as the incident surface 14, the upper surface will be referred to as the light exit surface 15, and the lower surface will be referred to as the bottom surface. On the side of the light guide plate 10, a light source 2 such as a hot cathode glory lamp or a cold cathode glory lamp, and a reflector 7 are disposed; the light of the light source 2 is directly or reflected by the reflector 7 and incident on the light guide plate 1 The incident surface 14 on the side. In I277806, the lower surface of the light guide plate 1 朝 in the downward direction is provided with the reflection sheet 3 line reflected upward. The light emitted by the human face 14 on the side of the light guide plate U) is scattered by the lens portion U of the plate 10. As described above, since the surface of the lens portion U 2 is provided with the fine scattering grooves 13, the light can be efficiently emitted. A part of the light scattered by the lens 胄U is partially reflected by the upper side _ = 15 downwards--partially emitted through the light-emitting surface 15 toward the upper liquid crystal display device 19. The light reflected downward is continuously reflected between the light-emitting surface Η and the lens portion 11. The light emitted toward the light-emitting surface 15 of the light guide plate 10 is refracted by the three-dimensional projections (3) in the vertical direction and concentrated. In other words, in the related art, the light emitted from the light-emitting surface can be scattered and condensed by attaching the diffusion sheet and the two cymbals to each other on the side of the light guide plate. However, in the present invention, the three-dimensional protrusion on the side of the light guide plate The part i2a can replace the various plates described above to achieve the same function. Figure 6 is a perspective view of a light guide plate according to a second embodiment of the present invention. The components of the light guide plate according to the second embodiment of the present invention are the same as those of the third embodiment, but the shape of the three-dimensional protrusion portion constituting the condensing portion 22 is different. In the second embodiment, the three-dimensional projection 22a formed on the upper surface of the light guide plate 2 has a hexagonal taper shape in which the upper corner is cut straight. Fig. 7 is a light guide plate according to a third embodiment of the present invention. The lens portion 31 on the lower surface of the light guide plate 30 according to the third embodiment of the present invention has a plurality of semi-circular protrusions 3U so as to extend in a substantially parallel direction of the light incident surface. Further, the lens portion 31, = In the case of the embodiment, it is processed to be a certain thickness (four), and a plurality of 1277806 are formed on the surface of the fine scattering groove (the portion "not shown" is provided with the light collecting portion 32 from the lens portion 31. The light portion 32 and the inner wall surface 32b are inclined at an oblique angle. Further, it is preferable that the light scattered by the light guide plate 30 is collected in the upper direction by the upper surface groove portion 32a recessed in the light guide plate 30. The operation of the backlight unit of the liquid crystal display device of the light guide plate of the third embodiment of the second embodiment is similar to that of the first embodiment. , so I won't go into details here.
本！X月纟不脫離令請專利範圍的要旨下，所屬技術 領域中具有通常知識者要實施各種變形或改良均是可能 的’故本發明之技術保護範圍並不限於前述實施例。 【圖式簡單說明】 圖1，係表示使用習知技術的導光板之液晶顯示裝置 背光單元的構造概略圖。 圖2 ’係本發明第1實施例之導光板的側視圖。 圖3 ’係本發明第1實施例之導光板的立體圖。 ® 4 ’係從圖3所示之導光板底部視之立體圖。 圖5 ’係具備本發明第丨實施例的導光板之背光單元 的分解狀態圖。 圖 圖 【 2 6 ’係本發明第2實施例之導光板的立體圖 7 ’係本發明第3實施例之導光板的側視圖 主要元件符號說明】 光源 反射片 3 1277806 7 反射體 11a 溝槽 12a、 22a 立體突起部 14 入射面 15 出光面 19 液晶顯不裝置 31a 突起 13 微細散射溝槽 32a 溝槽部 32b 内壁面 1卜31 透鏡部 12 ' 32 聚光部 10 、 20 、 30 導光板 12this! It is possible that a person skilled in the art can implement various modifications or improvements without departing from the scope of the invention, and the technical scope of the present invention is not limited to the foregoing embodiments. BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a schematic view showing the structure of a liquid crystal display device backlight unit using a light guide plate of a prior art. Figure 2 is a side view of a light guide plate according to a first embodiment of the present invention. Fig. 3 is a perspective view showing a light guide plate according to a first embodiment of the present invention. ® 4 ' is a perspective view from the bottom of the light guide shown in Figure 3. Fig. 5 is an exploded perspective view showing a backlight unit having a light guide plate according to a second embodiment of the present invention. FIG. 6 is a perspective view of a light guide plate according to a second embodiment of the present invention. FIG. 3 is a side view of a light guide plate according to a third embodiment of the present invention. A light source reflection sheet 3 1277806 7 a reflector 11a a groove 12a 22a three-dimensional protrusion 14 incident surface 15 light-emitting surface 19 liquid crystal display device 31a protrusion 13 fine scattering groove 32a groove portion 32b inner wall surface 1 31 lens portion 12' 32 concentrating portion 10, 20, 30 light guide plate 12