TW202020521A

TW202020521A - Light guide plate and backlight module

Info

Publication number: TW202020521A
Application number: TW107141963A
Authority: TW
Inventors: 邱文彥
Original assignee: 台灣揚昕股份有限公司
Priority date: 2018-11-16
Filing date: 2018-11-23
Publication date: 2020-06-01
Also published as: TWI664477B; CN111198415B; CN111198415A

Abstract

A light guide plate and a backlight module are provided. The light guide plate has a first region and a second region, and includes a body, a plurality of first strip-like microstructures, a plurality of prism-like microstructures and a plurality of diffuser microstructures. The body has a first surface and a second surface opposite to each other and a first side surface, and the first region is closer to the first side surface than the second region. The first strip-like microstructures are formed on the first surface and located in the first region. The first strip-like microstructures extend along a first direction parallel to the first side surface. The prism-like microstructures are concave on the second surface and located in the second region. Each of the prism-like microstructures has a first inclined surface facing the first side surface. The diffuser microstructures are concave on the second surface and located in the first region. The backlight module includes the aforementioned light guide plate.

Description

導光板與背光模組Light guide plate and backlight module

本發明是有關於一種導光板與背光模組，且特別是有關於一種具有準直微結構（Collimation Microstructure）的導光板與背光模組。The invention relates to a light guide plate and a backlight module, and in particular to a light guide plate and a backlight module with a collimation microstructure.

目前的電子裝置多利用平面顯示模組進行畫面的顯示，其中又以液晶顯示模組的技術較為純熟且普及化。然而，由於液晶顯示模組的顯示面板本身無法發光，故在顯示面板下方具有背光模組以提供顯示畫面所需光線。背光模組主要可分為側光式背光模組及直下式背光模組。側光式背光模組是利用導光板將配置於導光板入光側面的光源所發出的光線導向導光板的出光面，藉以形成面光源。一般而言，可在導光板的表面形成光學微結構，以提高導光板的出光均勻度及亮度，並藉此提高背光模組的出光效率以及光學品質。Current electronic devices mostly use flat display modules to display images. Among them, the technology of liquid crystal display modules is more sophisticated and popular. However, since the display panel of the liquid crystal display module itself cannot emit light, there is a backlight module below the display panel to provide the light required for displaying the picture. The backlight module can be mainly divided into an edge type backlight module and a direct type backlight module. The edge-light type backlight module uses the light guide plate to guide the light emitted from the light source arranged on the light incident side of the light guide plate to the light exit surface of the light guide plate, thereby forming a surface light source. Generally speaking, optical microstructures can be formed on the surface of the light guide plate to improve the light uniformity and brightness of the light guide plate, and thereby improve the light extraction efficiency and optical quality of the backlight module.

並且，現有一種具有準直微結構的導光板，由於其上的準直微結構平滑且迎光面角夾角小，光線需要經過多次入射到準直微結構，進而漸漸達到可折射出導光板上表面的入射角，才自導光板出光。然而，此種導光板由於光線需要多次經過準直微結構後才會自導光板出光，因此越靠近導光板的入光側，所能出光的光線越少，而於導光板的入光側形成一暗帶區域，進而導致導光板所提供的面光源不均勻。並且，此種導光板也不易消除因於導光板的入光面旁排列的複數個發光二極體所造成的多個亮區與暗區的熱點（hot spot）現象。In addition, there is a light guide plate with collimated microstructures. Because the collimated microstructures on the light guide plate are smooth and the angle of the light incident surface is small, the light needs to be incident on the collimated microstructures multiple times to gradually refract the light guide plate Only the incident angle of the upper surface emits light from the light guide plate. However, since the light guide plate needs to pass through the collimating microstructure many times before it exits the light guide plate, the closer to the light entrance side of the light guide plate, the less light can be emitted, and the light entrance side of the light guide plate A dark band area is formed, which in turn leads to uneven surface light provided by the light guide plate. Moreover, this kind of light guide plate is also not easy to eliminate the hot spot phenomenon of multiple bright and dark areas caused by a plurality of light emitting diodes arranged beside the light incident surface of the light guide plate.

“先前技術”段落只是用來幫助了解本發明內容，因此在“先前技術”段落所揭露的內容可能包含一些沒有構成所屬技術領域中具有通常知識者所知道的習知技術。在“先前技術”段落所揭露的內容，不代表該內容或者本發明一個或多個實施例所要解決的問題，在本發明申請前已被所屬技術領域中具有通常知識者所知曉或認知。The "prior art" paragraph is only used to help understand the content of the present invention. Therefore, the content disclosed in the "prior art" paragraph may include some conventional technologies that are not known to those of ordinary skill in the art. The content disclosed in the "Prior Art" paragraph does not mean that the content or the problem to be solved by one or more embodiments of the present invention has been known or recognized by those with ordinary knowledge in the technical field before the application of the present invention.

本發明提供一種導光板，具有良好的光學表現。The invention provides a light guide plate with good optical performance.

本發明提供一種背光模組，具有良好的光學表現。The invention provides a backlight module with good optical performance.

本發明的其他目的和優點可以從本發明所揭露的技術特徵中得到進一步的了解。Other objects and advantages of the present invention can be further understood from the technical features disclosed by the present invention.

為達上述之一或部份或全部目的或是其他目的，本發明的一實施例提出一種導光板。導光板具有一第一區域與一第二區域，且包括一板體、多個第一條狀微結構、多個稜鏡狀微結構以及多個散光微結構。板體具有一第一表面、一第二表面以及一第一側表面，第一表面與第二表面彼此相對，第一側表面連接第一表面與第二表面，且導光板的第一區域較第二區域更鄰近於第一側表面。第一條狀微結構形成於板體的第一表面，並位於第一區域中。第一條狀微結構沿著一第一方向延伸，並沿著一第二方向排列，第一方向平行於第一側表面，第二方向垂直於第一方向。稜鏡狀微結構形成於板體的第二表面，並位於第二區域中。各稜鏡狀微結構凹入第二表面，並具有一第一斜面與一第二斜面，且這些稜鏡狀微結構的這些第一斜面朝向第一側表面。散光微結構形成於板體的第二表面，並位於第一區域中。各散光微結構凹入第二表面，並具有一第一結構面與一第二結構面，這些散光微結構的這些第一結構面朝向第一側表面，且這些第一結構面為曲面，這些第二結構面朝向這些稜鏡狀微結構的這些第一斜面。In order to achieve one, some or all of the above-mentioned objectives or other objectives, an embodiment of the present invention provides a light guide plate. The light guide plate has a first area and a second area, and includes a plate body, a plurality of first strip-shaped microstructures, a plurality of prism-shaped microstructures, and a plurality of astigmatism microstructures. The plate body has a first surface, a second surface and a first side surface, the first surface and the second surface are opposite to each other, the first side surface connects the first surface and the second surface, and the first area of the light guide plate is relatively The second area is closer to the first side surface. The first strip-shaped microstructure is formed on the first surface of the plate body and is located in the first area. The first strip-shaped microstructures extend along a first direction and are arranged along a second direction, the first direction is parallel to the first side surface, and the second direction is perpendicular to the first direction. The prism-like microstructure is formed on the second surface of the plate body and is located in the second area. Each lenticular microstructure is recessed into the second surface and has a first slanted surface and a second slanted surface, and the first slanted surfaces of the lenticular microstructures face the first side surface. The astigmatic microstructure is formed on the second surface of the plate body and located in the first area. Each astigmatism microstructure is recessed into the second surface and has a first structure surface and a second structure surface. The first structure surfaces of the astigmatism microstructures face the first side surface, and the first structure surfaces are curved surfaces. These The second structural plane faces the first inclined planes of the lenticular microstructures.

為達上述之一或部份或全部目的或是其他目的，本發明的一實施例提出一種背光模組。背光模組包括一前述的導光板以及一光源。光源位於導光板的第一側表面旁，其中光源適於提供一光束，光束經由第一側表面進入導光板，且藉由這些第一條狀微結構與這些稜鏡狀微結構的這些第一斜面而改變行進方向，進而自第一表面離開導光板。In order to achieve one, some or all of the above-mentioned objectives or other objectives, an embodiment of the present invention provides a backlight module. The backlight module includes a light guide plate and a light source. The light source is located beside the first side surface of the light guide plate, wherein the light source is adapted to provide a light beam, the light beam enters the light guide plate through the first side surface, and by the first strip-shaped microstructures and the first The inclined surface changes the traveling direction, and then leaves the light guide plate from the first surface.

在本發明的一實施例中，上述的各第一條狀微結構自第一表面凸出，並具有一第一條狀斜面與一第二條狀斜面，這些第一條狀微結構的這些第一條狀斜面朝向第一側表面，這些第二條狀斜面朝向第二區域，各第一條狀微結構的第二條狀斜面與第一表面之間具有一第一夾角，各稜鏡狀微結構的第一斜面與第二表面之間具有一第二夾角，且第一夾角大於第二夾角的補角。In an embodiment of the present invention, each of the above-mentioned first strip-shaped microstructures protrudes from the first surface, and has a first strip-shaped inclined surface and a second strip-shaped inclined surface. The first strip-shaped inclined planes face the first side surface, and the second strip-shaped inclined planes face the second region, and the second strip-shaped inclined planes of each first strip-shaped microstructure have a first angle between the first surface and each of them There is a second included angle between the first inclined surface and the second surface of the micro-structure, and the first included angle is greater than the complementary angle of the second included angle.

在本發明的一實施例中，上述的各第一條狀微結構自第一表面凸出，並具有一第一條狀斜面與一第二條狀斜面，這些第一條狀微結構的這些第一條狀斜面朝向第一側表面，這些第二條狀斜面朝向第二區域，各第一條狀微結構的第二條狀斜面與第一表面之間具有一第一夾角，各稜鏡狀微結構的第一斜面與第二表面之間具有一第二夾角，第一夾角的角度大於等於2度且小於等於5度，且第二夾角的補角的角度大於等於2度且小於等於7度。In an embodiment of the present invention, each of the above-mentioned first strip-shaped microstructures protrudes from the first surface, and has a first strip-shaped inclined surface and a second strip-shaped inclined surface. The first strip-shaped inclined planes face the first side surface, and the second strip-shaped inclined planes face the second region, and the second strip-shaped inclined planes of each first strip-shaped microstructure have a first angle between the first surface and each of them There is a second angle between the first inclined surface and the second surface of the micro-structure, the angle of the first angle is greater than or equal to 2 degrees and less than or equal to 5 degrees, and the angle of the supplementary angle of the second angle is greater than or equal to 2 degrees and less than or equal to 7 degrees.

在本發明的一實施例中，上述的各第一條狀微結構的第一條狀斜面與第一表面之間具有一第三夾角，且第三夾角的角度大於等於45度且小於等於90度。In an embodiment of the present invention, each of the first strip-shaped microstructures has a third angle between the first strip-shaped slope and the first surface, and the angle of the third angle is greater than or equal to 45 degrees and less than or equal to 90 degree.

在本發明的一實施例中，上述的第一區域在第二方向上具有一第一長度，第一長度大於等於3毫米且小於等於5毫米。In an embodiment of the present invention, the above-mentioned first area has a first length in the second direction, and the first length is greater than or equal to 3 mm and less than or equal to 5 mm.

在本發明的一實施例中，上述的第一結構面與第二結構面的相交曲線為圓弧線或橢圓曲線。In an embodiment of the invention, the intersection curve of the first structure surface and the second structure surface is a circular arc line or an elliptic curve.

在本發明的一實施例中，上述的第一結構面在平行第二方向的一剖面中具有一輪廓線，且輪廓線為圓弧線或橢圓曲線。In an embodiment of the invention, the above-mentioned first structure surface has a contour line in a cross-section parallel to the second direction, and the contour line is a circular arc line or an elliptic curve.

在本發明的一實施例中，上述的導光板，還包括多個第二條狀微結構。第二條狀微結構形成於板體的第一表面，並位於第二區域中，其中這些第二條狀微結構沿著第二方向延伸，並沿著第一方向排列。In an embodiment of the invention, the above light guide plate further includes a plurality of second strip-shaped microstructures. The second strip-shaped microstructures are formed on the first surface of the plate body and located in the second area, wherein the second strip-shaped microstructures extend along the second direction and are arranged along the first direction.

在本發明的一實施例中，上述的這些稜鏡狀微結構與各第二條狀微結構相對應，且呈陣列排列。In an embodiment of the present invention, the above-mentioned micro-structures corresponding to each other correspond to each second micro-structure and are arranged in an array.

在本發明的一實施例中，上述的散光微結構呈陣列排列。In an embodiment of the invention, the above-mentioned astigmatism microstructures are arranged in an array.

基於上述，本發明的實施例至少具有以下其中一個優點或功效。在本發明的實施例中，背光模組與導光板藉由第一條狀微結構與散光微結構的配置，能達到良好的光學表現。並且，背光模組能藉此消除入光側的暗帶區域以及交錯的亮區與暗區的熱點（hot spot）現象，進而提供具有良好光學品質的均勻面光源。Based on the above, the embodiments of the present invention have at least one of the following advantages or effects. In the embodiments of the present invention, the backlight module and the light guide plate can achieve good optical performance through the arrangement of the first strip-shaped microstructure and the astigmatism microstructure. In addition, the backlight module can eliminate the dark band area on the light entrance side and the hot spot phenomenon of the interleaved bright and dark areas, thereby providing a uniform surface light source with good optical quality.

為讓本發明的上述特徵和優點能更明顯易懂，下文特舉實施例，並配合所附圖式作詳細說明如下。In order to make the above-mentioned features and advantages of the present invention more obvious and understandable, the embodiments are specifically described below and described in detail in conjunction with the accompanying drawings.

有關本發明之前述及其他技術內容、特點與功效，在以下配合參考圖式之一較佳實施例的詳細說明中，將可清楚的呈現。以下實施例中所提到的方向用語，例如：上、下、左、右、前或後等，僅是參考附加圖式的方向。因此，使用的方向用語是用來說明並非用來限制本發明。The foregoing and other technical contents, features and effects of the present invention will be clearly presented in the following detailed description with reference to one of the preferred embodiments of the drawings. Direction terms mentioned in the following embodiments, for example: up, down, left, right, front or back, etc., are only for directions referring to additional drawings. Therefore, the directional terminology is used to illustrate rather than limit the invention.

圖1A是本發明一實施例的一種背光模組的架構示意圖。圖1B是圖1A的導光板沿A-A線的剖視示意圖。請參照圖1A與圖1B，本實施例的背光模組200包括一導光板100以及一光源210。舉例而言，在本實施例中，光源210可為包含多個發光二極體(light emitting diode，LED)元件或其它種類之發光元件的光條，而適於提供光束。FIG. 1A is a schematic structural diagram of a backlight module according to an embodiment of the invention. FIG. 1B is a schematic cross-sectional view of the light guide plate of FIG. 1A along line A-A. 1A and 1B, the backlight module 200 of this embodiment includes a light guide plate 100 and a light source 210. For example, in this embodiment, the light source 210 may be a light bar including a plurality of light emitting diode (LED) elements or other types of light emitting elements, and is suitable for providing a light beam.

具體而言，如圖1A與圖1B所示，在本實施例中，導光板100具有一第一區域R1與一第二區域R2，且包括一板體110、多個第一條狀微結構120、多個第二條狀微結構130、多個稜鏡狀微結構140以及多個散光微結構150。板體110具有一第一表面S1、一第二表面S2以及一第一側表面SL1，第一表面S1與第二表面S2彼此相對，第一側表面SL1連接第一表面S1與第二表面S2，且導光板100的第一區域R1較第二區域R2更鄰近於第一側表面SL1。Specifically, as shown in FIGS. 1A and 1B, in this embodiment, the light guide plate 100 has a first region R1 and a second region R2, and includes a plate body 110 and a plurality of first strip-shaped microstructures 120, a plurality of second strip-shaped microstructures 130, a plurality of prism-shaped microstructures 140, and a plurality of astigmatism microstructures 150. The board 110 has a first surface S1, a second surface S2, and a first side surface SL1. The first surface S1 and the second surface S2 are opposite to each other. The first side surface SL1 connects the first surface S1 and the second surface S2. And the first region R1 of the light guide plate 100 is closer to the first side surface SL1 than the second region R2.

更具體而言，如圖1A與圖1B所示，在本實施例中，第一條狀微結構120與第二條狀微結構130形成於板體110的第一表面S1，且第一條狀微結構120位於第一區域R1中，第二條狀微結構130位於第二區域R2中。另一方面，如圖1A與圖1B所示，在本實施例中，稜鏡狀微結構140與散光微結構150形成於板體110的第二表面S2，且稜鏡狀微結構140位於第二區域R2中，而散光微結構150位於第一區域R1中。More specifically, as shown in FIGS. 1A and 1B, in this embodiment, the first strip-shaped microstructure 120 and the second strip-shaped microstructure 130 are formed on the first surface S1 of the board body 110, and the first strip The micro-structure 120 is located in the first region R1, and the second micro-structure 130 is located in the second region R2. On the other hand, as shown in FIGS. 1A and 1B, in the present embodiment, the prism-shaped microstructure 140 and the astigmatism microstructure 150 are formed on the second surface S2 of the plate body 110, and the prism-shaped microstructure 140 is located at the In the two regions R2, the astigmatic microstructure 150 is located in the first region R1.

進一步而言，如圖1A所示，在本實施例中，第一條狀微結構120沿著一第一方向D1延伸，並沿著一第二方向D2排列，第二條狀微結構130沿著第二方向D2延伸，並沿著第一方向D1排列。如圖1A所示，在本實施例中，第一方向D1平行於第一側表面SL1，第二方向D2平行於第一側表面SL1的法線方向。換言之，第二方向D2垂直於第一方向D1。為了便於描述背光模組200中各元件或結構的方向，以下定義一直角座標系，其中x軸實質上平行於第一方向D1，y軸實質上垂直於導光板100的板體110的第一表面S1，而z軸實質上平行於第二方向D2，而垂直於x軸與y軸，但直角座標系僅是參考附加圖式的座標。因此，使用的座標用語是用來說明並非用來限制本發明。Further, as shown in FIG. 1A, in this embodiment, the first strip-shaped microstructure 120 extends along a first direction D1 and is arranged along a second direction D2, and the second strip-shaped microstructure 130 extends along It extends in the second direction D2 and is arranged along the first direction D1. As shown in FIG. 1A, in this embodiment, the first direction D1 is parallel to the first side surface SL1, and the second direction D2 is parallel to the normal direction of the first side surface SL1. In other words, the second direction D2 is perpendicular to the first direction D1. In order to facilitate the description of the direction of each element or structure in the backlight module 200, a rectangular coordinate system is defined below, where the x-axis is substantially parallel to the first direction D1 and the y-axis is substantially perpendicular to the first of the plate body 110 of the light guide plate 100 The surface S1, and the z-axis is substantially parallel to the second direction D2 and perpendicular to the x-axis and the y-axis, but the rectangular coordinate system is only a coordinate with reference to the additional drawings. Therefore, the coordinate terminology used is for illustration and not for limiting the present invention.

此外，如圖1A與圖1B所示，在本實施例中，導光板100的第一區域R1在第二方向D2上具有一第一長度L1，第一長度L1大於等於3毫米且小於等於5毫米。應注意的是，此處的數值範圍皆僅是作為例示說明之用，其並非用以限定本發明。In addition, as shown in FIGS. 1A and 1B, in this embodiment, the first region R1 of the light guide plate 100 has a first length L1 in the second direction D2, and the first length L1 is greater than or equal to 3 mm and less than or equal to 5 Mm. It should be noted that the numerical ranges herein are for illustrative purposes only, and are not intended to limit the present invention.

以下將搭配圖2A至圖3，對第一條狀微結構120與稜鏡狀微結構140的細部結構以及相對配置關係進行進一步地解說。The detailed structure and relative arrangement relationship between the first strip-shaped microstructure 120 and the lenticular microstructure 140 will be further explained below with reference to FIGS. 2A to 3.

圖2A與圖2B是圖1A的不同的第一條狀微結構的剖視示意圖。圖3是圖1A的背光模組的光路示意圖。具體而言，如圖2A與圖3所示，在本實施例中，各第一條狀微結構120自第一表面S1凸出，並具有一第一條狀斜面ST1與一第二條狀斜面ST2。這些第一條狀微結構120的這些第一條狀斜面ST1朝向第一側表面SL1，這些第二條狀斜面ST2朝向第二區域R2。進一步而言，如圖2A與圖3所示，在本實施例中，相鄰的其中一第一條狀微結構120的第一條狀斜面ST1與另一第一條狀微結構120的第二條狀斜面ST2並不相連，且相鄰的第一條狀微結構120之間具有一間距P，但本發明不以此為限。在另一實施例中（如圖2B所示），相鄰的其中一第一條狀微結構120的第一條狀斜面ST1亦可與另一第一條狀微結構120的第二條狀斜面ST2相連，此時，第一條狀微結構120的頂部可選擇性地形成一連接面LS，連接面LS連接第一條狀斜面ST1與第二條狀斜面ST2，且具有一寬度W，此寬度W的大小與圖2A的實施例所示的間距P具有相同的範圍。2A and 2B are schematic cross-sectional views of different first strip-shaped microstructures in FIG. 1A. FIG. 3 is a schematic diagram of the optical path of the backlight module of FIG. 1A. Specifically, as shown in FIGS. 2A and 3, in this embodiment, each first strip-shaped microstructure 120 protrudes from the first surface S1 and has a first strip-shaped inclined surface ST1 and a second strip-shaped Bevel ST2. The first strip-shaped inclined surfaces ST1 of the first strip-shaped microstructures 120 face the first side surface SL1, and the second strip-shaped inclined surfaces ST2 face the second region R2. Further, as shown in FIGS. 2A and 3, in this embodiment, the adjacent first strip-shaped slope ST1 of one of the first strip-shaped microstructures 120 and the first The two strip-shaped inclined surfaces ST2 are not connected, and there is a pitch P between the adjacent first strip-shaped microstructures 120, but the invention is not limited thereto. In another embodiment (as shown in FIG. 2B ), the adjacent first strip-shaped slope ST1 of one of the first strip-shaped microstructures 120 can also be in contact with the second strip-shaped surface of another first strip-shaped microstructure 120. The slopes ST2 are connected. At this time, the top of the first strip-shaped microstructure 120 can selectively form a connection surface LS, which connects the first strip-shaped slope ST1 and the second strip-shaped slope ST2, and has a width W, The size of this width W has the same range as the pitch P shown in the embodiment of FIG. 2A.

換言之，這些第一條狀微結構120可形成多個單位條狀微結構，且各單位條狀微結構之間具有間隔，這些間隔能以單一條狀微結構中的梯形的頂面（即連接面LS）的寬度W的形式出現，亦能以兩條第一狀微結構間的間距P的形式出現。並且，如圖2A與圖2B所示，在本實施例中，這些單位條狀微結構具有一單位長度UL以及一單位深度D。舉例而言，在本實施例中，單位長度UL的尺寸範圍大於等於35微米，且小於等於350微米；單位深度D的尺寸範圍大於等於3微米，且小於等於12微米；間隔（即間距P或寬度W）的尺寸範圍小於等於50微米。應注意的是，此處的數值範圍皆僅是作為例示說明之用，其並非用以限定本發明。In other words, these first strip-shaped microstructures 120 can form a plurality of unit strip-shaped microstructures, and each unit strip-shaped microstructure has a gap between them, and these gaps can be connected to the top surface of the trapezoid in a single strip-shaped microstructure (ie, connected The width W of the surface LS) can also appear in the form of the spacing P between two first-shaped microstructures. Moreover, as shown in FIGS. 2A and 2B, in this embodiment, these unit strip-shaped microstructures have a unit length UL and a unit depth D. For example, in this embodiment, the size range of the unit length UL is greater than or equal to 35 microns and less than or equal to 350 microns; the size range of the unit depth D is greater than or equal to 3 microns and less than or equal to 12 microns; the interval (that is, the pitch P or The width W) has a size range of 50 microns or less. It should be noted that the numerical ranges herein are for illustrative purposes only, and are not intended to limit the present invention.

另一方面，如圖1A與圖3所示，在本實施例中，各稜鏡狀微結構140凹入第二表面S2，並具有一第一斜面TS1與一第二斜面TS2，且這些稜鏡狀微結構140的這些第一斜面TS1朝向第一側表面SL1。進一步而言，如圖1A與圖3所示，在本實施例中，這些稜鏡狀微結構140與各第二條狀微結構130相對應，且呈陣列排列。舉例而言，在本實施例中，一條第二條狀微結構130在第二表面S2上的正投影會對應一列稜鏡狀微結構140的位置，但由於各第二條狀微結構130的寬度與各稜鏡狀微結構140的寬度不一定相同，因此第二條狀微結構130在第二表面S2上的正投影不會完全與稜鏡狀微結構140的位置相疊。換言之，這些稜鏡狀微結構140位於第二條狀微結構130的正下方，但本發明不以此為限。在另一未繪示的實施例中，這些稜鏡狀微結構140亦可呈亂數排列。On the other hand, as shown in FIGS. 1A and 3, in this embodiment, each of the micro-structures 140 is recessed into the second surface S2, and has a first inclined surface TS1 and a second inclined surface TS2, and these edges These first inclined surfaces TS1 of the mirror-like microstructure 140 face the first side surface SL1. Further, as shown in FIG. 1A and FIG. 3, in this embodiment, these lenticular microstructures 140 correspond to the second strip-shaped microstructures 130 and are arranged in an array. For example, in this embodiment, the orthographic projection of a second strip-shaped microstructure 130 on the second surface S2 will correspond to the position of a row of lenticular microstructures 140, but due to the The width is not necessarily the same as the width of each lenticular microstructure 140, so the orthographic projection of the second strip-shaped microstructure 130 on the second surface S2 does not completely overlap the position of the lenticular microstructure 140. In other words, these prism-shaped microstructures 140 are located directly under the second strip-shaped microstructures 130, but the invention is not limited thereto. In another embodiment, not shown, the prism-like microstructures 140 may also be arranged in random numbers.

進一步而言，如圖3所示，在本實施例中，各第一條狀微結構120的第二條狀斜面ST2與第一表面S1之間具有一第一夾角θ1，各稜鏡狀微結構140的第一斜面TS1與第二表面S2之間具有一第二夾角θ2，且第一夾角θ1大於第二夾角θ2的補角。舉例而言，在本實施例中，第一夾角θ1的角度大於等於2度且小於等於5度，且第二夾角θ2的補角的角度大於等於2度且小於等於7度。各第一條狀微結構120的第一條狀斜面ST1與第一表面S1之間具有一第三夾角θ3，且第三夾角θ3的角度大於等於45度且小於等於90度。Furthermore, as shown in FIG. 3, in this embodiment, a first included angle θ1 is formed between the second strip-shaped inclined surface ST2 of each first strip-shaped microstructure 120 and the first surface S1, and each of the strip-shaped microstructures The structure 140 has a second angle θ2 between the first inclined surface TS1 and the second surface S2, and the first angle θ1 is greater than the complementary angle of the second angle θ2. For example, in this embodiment, the angle of the first included angle θ1 is greater than or equal to 2 degrees and less than or equal to 5 degrees, and the angle of the complementary angle of the second included angle θ2 is greater than or equal to 2 degrees and equal to or less than 7 degrees. Each first strip-shaped microstructure 120 has a third included angle θ3 between the first strip-shaped inclined surface ST1 and the first surface S1, and the angle of the third included angle θ3 is greater than or equal to 45 degrees and less than or equal to 90 degrees.

如此，如圖3所示，在本實施例中，光源210位於導光板100的第一側表面SL1旁，光源210提供的光束L經由第一側表面SL1進入導光板100。換言之，在本實施例中，第一側表面SL1為導光板100的入光面。並且，如圖3所示，在本實施例中，光束L能藉由這些第一條狀微結構120與這些稜鏡狀微結構140的這些第一斜面TS1而改變行進方向，進而自第一表面S1離開導光板100。進一步而言，如圖3所示，在本實施例中，藉由導光板100的第一條狀微結構120的配置，光束L可在接近第一側表面SL1側的第一區域R1時，就使部分光線可提前在位於第一區域R1中或其鄰近處的第一表面S1出光。如此，即可消除導光板100的入光側所形成的暗帶區域的現象，進而提供均勻的面光源。Thus, as shown in FIG. 3, in this embodiment, the light source 210 is located beside the first side surface SL1 of the light guide plate 100, and the light beam L provided by the light source 210 enters the light guide plate 100 via the first side surface SL1. In other words, in this embodiment, the first side surface SL1 is the light incident surface of the light guide plate 100. Furthermore, as shown in FIG. 3, in this embodiment, the light beam L can change the traveling direction by the first inclined planes TS1 of the first strip-shaped microstructures 120 and the prism-shaped microstructures 140, and then from the first The surface S1 leaves the light guide plate 100. Further, as shown in FIG. 3, in this embodiment, by the arrangement of the first strip-shaped microstructures 120 of the light guide plate 100, the light beam L can approach the first region R1 on the side of the first side surface SL1, In this way, part of the light can be emitted in advance on the first surface S1 located in or near the first region R1. In this way, the phenomenon of the dark band region formed on the light incident side of the light guide plate 100 can be eliminated, thereby providing a uniform surface light source.

此外，如圖3所示，在本實施例中，背光模組200還包括一光學元件220，舉例而言，光學元件220可為一逆稜鏡。在本實施例中，光學元件220上具有多個逆稜鏡微結構PMS，此種逆稜鏡微結構PMS設計會允許光束L以具有較小的出射角度從逆稜鏡射出，以達到光線準直化的效果。In addition, as shown in FIG. 3, in the present embodiment, the backlight module 200 further includes an optical element 220. For example, the optical element 220 may be an invert. In this embodiment, the optical element 220 has multiple inverse microstructures PMS. The design of the inverse microstructures PMS allows the light beam L to exit the invertible microstructure with a smaller exit angle to achieve light quasi The effect of straightening.

另一方面，在本實施例中，亦可藉由導光板100的散光微結構150的配置，來消除光源210在導光板100的第一側表面SL1側所可能造成的多個亮區與暗區的熱點（hot spot）現象。以下將搭配圖4A至圖4F，進行進一步地解說。On the other hand, in this embodiment, the arrangement of the astigmatism microstructures 150 of the light guide plate 100 can also be used to eliminate the multiple bright areas and darkness that the light source 210 may cause on the first side surface SL1 side of the light guide plate 100 Hot spot phenomenon in the district. The following will further explain with reference to FIGS. 4A to 4F.

圖4A是圖1A的多個散光微結構的架構示意圖。圖4B至圖4E是圖4A的散光微結構的結構示意圖。圖4F是通過圖1A的散光微結構的光路示意圖。如圖4A所示，在本實施例中，各散光微結構150凹入第二表面S2，並呈陣列排列。更詳細而言，如圖4A至圖4E所示，在本實施例中，散光微結構150具有一第一結構面SS1與一第二結構面SS2，這些散光微結構150的這些第一結構面SS1朝向第一側表面SL1，且這些第一結構面SS1為曲面。另一方面，在本實施例中，這些第二結構面SS2朝向這些稜鏡狀微結構140的這些第一斜面TS1，且第二結構面SS2為平面，但本發明不以此為限。在另一實施例中，第二結構面SS2亦可包含曲面，換言之，第二結構面SS2可為平面或曲面，本發明皆不以此為限。4A is a schematic structural diagram of a plurality of astigmatic microstructures in FIG. 1A. 4B to 4E are schematic structural diagrams of the astigmatic microstructure of FIG. 4A. 4F is a schematic diagram of an optical path through the astigmatic microstructure of FIG. 1A. As shown in FIG. 4A, in this embodiment, each astigmatic microstructure 150 is recessed into the second surface S2 and arranged in an array. In more detail, as shown in FIGS. 4A to 4E, in this embodiment, the astigmatic microstructure 150 has a first structural surface SS1 and a second structural surface SS2, and the first structural surfaces of the astigmatic microstructures 150 SS1 faces the first side surface SL1, and these first structural surfaces SS1 are curved surfaces. On the other hand, in the present embodiment, the second structure planes SS2 face the first inclined planes TS1 of the lenticular microstructures 140, and the second structure plane SS2 is a plane, but the invention is not limited thereto. In another embodiment, the second structural surface SS2 may also include a curved surface. In other words, the second structural surface SS2 may be a flat surface or a curved surface, and the present invention is not limited thereto.

此外，如圖4B與圖4C所示，在本實施例中，第一結構面SS1與第二結構面SS2由一轉角CR連接，且此轉角CR為一R角結構。並且，如圖4D所示，在本實施例中，第一結構面SS1與第二結構面SS2的相交曲線為圓弧線或橢圓曲線。此外，如圖4B所示，在本實施例中，第一結構面SS1在平行第二方向D2的一剖面中具有一輪廓線CL，且輪廓線CL為圓弧線或橢圓曲線。In addition, as shown in FIGS. 4B and 4C, in this embodiment, the first structural surface SS1 and the second structural surface SS2 are connected by a corner CR, and the corner CR is an R-angle structure. Furthermore, as shown in FIG. 4D, in this embodiment, the intersection curve of the first structural surface SS1 and the second structural surface SS2 is a circular arc line or an elliptic curve. In addition, as shown in FIG. 4B, in this embodiment, the first structural surface SS1 has a contour line CL in a cross section parallel to the second direction D2, and the contour line CL is a circular arc line or an elliptic curve.

進一步而言，如圖4A與圖4F所示，在本實施例中，散光微結構150朝向第一側表面SL1（即入光面）的第一結構面SS1為曲面，因此有利於使入射散光微結構150的光束L發散。如此，如圖4F所示，在本實施例中，光源210提供的光束L能以各種不同角度被反射到第一區域R1中，而達到擴散光線效果，進而消除光源210在導光板100的第一側表面SL1側所可能造成的多個亮區與暗區的熱點（hot spot）現象。Further, as shown in FIGS. 4A and 4F, in this embodiment, the first structure surface SS1 of the astigmatic microstructure 150 facing the first side surface SL1 (ie, the light incident surface) is a curved surface, which is beneficial to make incident astigmatism The light beam L of the microstructure 150 diverges. Thus, as shown in FIG. 4F, in this embodiment, the light beam L provided by the light source 210 can be reflected into the first region R1 at various angles to achieve the effect of diffusing light, thereby eliminating the first light source 210 in the light guide plate 100. The hot spot phenomenon of multiple bright and dark areas that may be caused by the side surface SL1.

圖5A與圖5B是光線進入各種比較例的導光板時的光形分布圖。圖5C是光線進入圖1A的導光板時的光形分布圖。請參照圖5A與圖5B，在圖5A的實施例中，其所採用的導光板500A與圖1A的導光板100類似，但缺乏第一條狀微結構的配置，在圖5B的實施例中，其所採用的導光板500B亦與圖1A的導光板類似，但缺乏散光微結構的配置。如此，如圖5A所示，導光板500A與其形成的背光模組在入光側會出現明顯的暗帶區域。另一方面，如圖5B所示，導光板500B與其形成的背光模組在入光側則會出現明顯的多個交錯的亮區與暗區的熱點（hot spot）現象。相對於此，如圖5C所示，在本實施例中，採用了導光板100的背光模組200則可藉由第一條狀微結構與散光微結構的配置，來消除入光側的暗帶區域以及交錯的亮區與暗區的熱點（hot spot）現象，進而提供均勻的面光源。請注意，圖5A、圖5B及圖5C中的導光板500A、500B、100以局部呈現。5A and 5B are light shape distribution diagrams when light enters the light guide plates of various comparative examples. FIG. 5C is a light shape distribution diagram when light enters the light guide plate of FIG. 1A. Please refer to FIGS. 5A and 5B. In the embodiment of FIG. 5A, the light guide plate 500A used is similar to the light guide plate 100 of FIG. 1A, but lacks the configuration of the first strip-shaped microstructure. In the embodiment of FIG. 5B The light guide plate 500B used is also similar to the light guide plate of FIG. 1A, but lacks the configuration of astigmatism microstructures. In this way, as shown in FIG. 5A, the light guide plate 500A and the backlight module formed thereon will have obvious dark band regions on the light incident side. On the other hand, as shown in FIG. 5B, the light guide plate 500B and the backlight module formed thereon may obviously have a plurality of interlaced hot spots of bright and dark areas on the light incident side. On the other hand, as shown in FIG. 5C, in this embodiment, the backlight module 200 using the light guide plate 100 can eliminate the darkness on the light entrance side by the arrangement of the first strip microstructure and the astigmatism microstructure The hot spot phenomenon in the band area and the interleaved bright and dark areas provide a uniform surface light source. Please note that the light guide plates 500A, 500B, and 100 in FIGS. 5A, 5B, and 5C are partially shown.

綜上所述，本發明的實施例至少具有以下其中一個優點或功效。在本發明的實施例中，背光模組與導光板藉由第一條狀微結構與散光微結構的配置，能達到良好的光學表現。並且，背光模組能藉此消除入光側的暗帶區域以及交錯的亮區與暗區的熱點（hot spot）現象，進而提供具有良好光學品質的均勻面光源。In summary, the embodiments of the present invention have at least one of the following advantages or effects. In the embodiments of the present invention, the backlight module and the light guide plate can achieve good optical performance through the arrangement of the first strip-shaped microstructure and the astigmatism microstructure. In addition, the backlight module can eliminate the dark band area on the light entrance side and the hot spot phenomenon of the interleaved bright and dark areas, thereby providing a uniform surface light source with good optical quality.

惟以上所述者，僅為本發明之較佳實施例而已，當不能以此限定本發明實施之範圍，即大凡依本發明申請專利範圍及發明說明內容所作之簡單的等效變化與修飾，皆仍屬本發明專利涵蓋之範圍內。另外本發明的任一實施例或申請專利範圍不須達成本發明所揭露之全部目的或優點或特點。此外，摘要部分和標題僅是用來輔助專利文件搜尋之用，並非用來限制本發明之權利範圍。此外，本說明書或申請專利範圍中提及的“第一”、“第二”等用語僅用以命名元件（element）的名稱或區別不同實施例或範圍，而並非用來限制元件數量上的上限或下限。However, the above are only the preferred embodiments of the present invention, which should not be used to limit the scope of the implementation of the present invention, that is, simple equivalent changes and modifications made according to the scope of the patent application of the present invention and the description of the invention, All of them are still covered by the patent of the present invention. In addition, any embodiment or scope of patent application of the present invention does not need to achieve all the objects, advantages, or features disclosed by the invention. In addition, the abstract part and title are only used to assist the search of patent documents, not to limit the scope of the present invention. In addition, the terms "first" and "second" mentioned in this specification or the scope of patent application are only used to name the element or distinguish different embodiments or ranges, not to limit the number of elements. Upper or lower limit.

100:導光板110:板體120:第一條狀微結構130:第二條狀微結構140:稜鏡狀微結構150:散光微結構200:背光模組210:光源220:光學元件A-A:線CL:輪廓線CR:轉角D:單位深度D1:第一方向D2:第二方向L:光束L1、UL:長度LS:連接面P:間距PMS:逆稜鏡微結構R1:第一區域R2:第二區域S1:第一表面S2:第二表面SL1:第一側表面SS1:第一結構面SS2:第二結構面ST1:第一條狀斜面ST2:第二條狀斜面TS1:第一斜面TS2:第二斜面W:寬度x、y、z:軸θ1:第一夾角θ2:第二夾角θ3:第三夾角100: light guide plate 110: plate body 120: first strip-shaped microstructure 130: second strip-shaped microstructure 140: tin-shaped microstructure 150: astigmatism microstructure 200: backlight module 210: light source 220: optical element AA: Line CL: contour line CR: corner D: unit depth D1: first direction D2: second direction L: beam L1, UL: length LS: connecting surface P: pitch PMS: inverse microstructure R1: first area R2 : Second area S1: First surface S2: Second surface SL1: First side surface SS1: First structured surface SS2: Second structured surface ST1: First strip-shaped inclined surface ST2: Second strip-shaped inclined surface TS1: First Bevel TS2: second bevel W: width x, y, z: axis θ1: first included angle θ2: second included angle θ3: third included angle

圖1A是本發明一實施例的一種背光模組的架構示意圖。圖1B是圖1A的導光板沿A-A線的剖視示意圖。圖2A與圖2B是圖1A的不同的第一條狀微結構的剖視示意圖。圖3是圖1A的背光模組的光路示意圖。圖4A是圖1A的多個散光微結構的架構示意圖。圖4B至圖4E是圖4A的散光微結構的結構示意圖。圖4F是通過圖1A的散光微結構的光路示意圖。圖5A與圖5B是光線進入各種比較例的導光板時的光形分布圖。圖5C是光線進入圖1A的導光板時的光形分布圖。FIG. 1A is a schematic structural diagram of a backlight module according to an embodiment of the invention. FIG. 1B is a schematic cross-sectional view of the light guide plate of FIG. 1A along line A-A. 2A and 2B are schematic cross-sectional views of different first strip-shaped microstructures in FIG. 1A. FIG. 3 is a schematic diagram of the optical path of the backlight module of FIG. 1A. 4A is a schematic structural diagram of a plurality of astigmatic microstructures in FIG. 1A. 4B to 4E are schematic structural diagrams of the astigmatic microstructure of FIG. 4A. 4F is a schematic diagram of an optical path through the astigmatic microstructure of FIG. 1A. 5A and 5B are light shape distribution diagrams when light enters the light guide plates of various comparative examples. FIG. 5C is a light shape distribution diagram when light enters the light guide plate of FIG. 1A.

100:導光板 100: light guide plate

110:板體 110: plate body

120:第一條狀微結構 120: first microstructure

130:第二條狀微結構 130: second strip microstructure

140:稜鏡狀微結構 140: Porcupine-like microstructure

150:散光微結構 150: Astigmatism microstructure

200:背光模組 200: backlight module

210:光源 210: light source

A-A:線 A-A: line

D1:第一方向 D1: First direction

D2:第二方向 D2: Second direction

L1:長度 L1: Length

R1:第一區域 R1: first area

R2:第二區域 R2: Second area

S1:第一表面 S1: first surface

S2:第二表面 S2: Second surface

SL1:第一側表面 SL1: first side surface

x、y、z:軸 x, y, z: axis

Claims

一種導光板，具有一第一區域與一第二區域，該導光板包括：一板體，具有一第一表面、一第二表面以及一第一側表面，該第一表面與該第二表面彼此相對，該第一側表面連接該第一表面與該第二表面，且該導光板的該第一區域較該第二區域更鄰近於該第一側表面；多個第一條狀微結構，形成於該板體的該第一表面，並位於該第一區域中，其中該些第一條狀微結構沿著一第一方向延伸，並沿著一第二方向排列，該第一方向平行於該第一側表面，該第二方向垂直於該第一方向；多個稜鏡狀微結構，形成於該板體的該第二表面，並位於該第二區域中，其中各該稜鏡狀微結構凹入該第二表面，並具有一第一斜面與一第二斜面，且該些稜鏡狀微結構的該些第一斜面朝向該第一側表面；以及多個散光微結構，形成於該板體的該第二表面，並位於該第一區域中，其中各該散光微結構凹入該第二表面，並具有一第一結構面與一第二結構面，該些散光微結構的該些第一結構面朝向該第一側表面，且該些第一結構面為曲面，該些第二結構面朝向該些稜鏡狀微結構的該些第一斜面。A light guide plate has a first area and a second area. The light guide plate includes: a plate body having a first surface, a second surface and a first side surface, the first surface and the second surface Opposite to each other, the first side surface connects the first surface and the second surface, and the first area of the light guide plate is closer to the first side surface than the second area; a plurality of first strip-shaped microstructures , Formed on the first surface of the plate and located in the first area, wherein the first strip-shaped microstructures extend along a first direction and are arranged along a second direction, the first direction Parallel to the first side surface, the second direction is perpendicular to the first direction; a plurality of prism-like microstructures formed on the second surface of the plate body and located in the second area, wherein each of the edges The mirror-like microstructure is recessed into the second surface, and has a first inclined surface and a second inclined surface, and the first inclined surfaces of the hull-shaped microstructures face the first side surface; and a plurality of astigmatism microstructures , Formed on the second surface of the plate and located in the first area, wherein each of the astigmatic microstructures is recessed into the second surface, and has a first structure surface and a second structure surface, the astigmatisms The first structure surfaces of the microstructure face the first side surface, and the first structure surfaces are curved surfaces, and the second structure surfaces face the first inclined surfaces of the lenticular microstructures.

如申請專利範圍第1項所述的導光板，其中各該第一條狀微結構自該第一表面凸出，並具有一第一條狀斜面與一第二條狀斜面，該些第一條狀微結構的該些第一條狀斜面朝向該第一側表面，該些第二條狀斜面朝向該第二區域，各該第一條狀微結構的該第二條狀斜面與該第一表面之間具有一第一夾角，各該稜鏡狀微結構的該第一斜面與該第二表面之間具有一第二夾角，且該第一夾角大於該第二夾角的補角。The light guide plate as described in item 1 of the patent application, wherein each of the first strip-shaped microstructures protrudes from the first surface, and has a first strip-shaped inclined surface and a second strip-shaped inclined surface, and the first The first strip-shaped slopes of the strip-shaped microstructure face the first side surface, and the second strip-shaped slopes face the second area, and the second strip-shaped slopes and the first There is a first included angle between the surfaces, and a second included angle between the first inclined surface and the second surface of each lenticular microstructure, and the first included angle is greater than the complementary angle of the second included angle.

如申請專利範圍第1項所述的導光板，其中各該第一條狀微結構自該第一表面凸出，並具有一第一條狀斜面與一第二條狀斜面，該些第一條狀微結構的該些第一條狀斜面朝向該第一側表面，該些第二條狀斜面朝向該第二區域，各該第一條狀微結構的該第二條狀斜面與該第一表面之間具有一第一夾角，各該稜鏡狀微結構的該第一斜面與該第二表面之間具有一第二夾角，該第一夾角的角度大於等於2度且小於等於5度，且該第二夾角的補角的角度大於等於2度且小於等於7度。The light guide plate as described in item 1 of the patent application, wherein each of the first strip-shaped microstructures protrudes from the first surface, and has a first strip-shaped inclined surface and a second strip-shaped inclined surface, and the first The first strip-shaped slopes of the strip-shaped microstructure face the first side surface, and the second strip-shaped slopes face the second area, and the second strip-shaped slopes and the first There is a first included angle between a surface, and there is a second included angle between the first inclined surface and the second surface of each lenticular microstructure, the angle of the first included angle is greater than or equal to 2 degrees and less than or equal to 5 degrees , And the angle of the supplementary angle of the second included angle is greater than or equal to 2 degrees and less than or equal to 7 degrees.

如申請專利範圍第2項所述的導光板，其中各該第一條狀微結構的該第一條狀斜面與該第一表面之間具有一第三夾角，且該第三夾角的角度大於等於45度且小於等於90度。The light guide plate as described in item 2 of the patent application scope, wherein each first strip-shaped microstructure has a third included angle between the first strip-shaped inclined surface and the first surface, and the angle of the third included angle is greater than Equal to 45 degrees and less than or equal to 90 degrees.

如申請專利範圍第1項所述的導光板，其中該第一區域在該第二方向上具有一第一長度，該第一長度大於等於3毫米且小於等於5毫米。The light guide plate as recited in item 1 of the patent application range, wherein the first area has a first length in the second direction, the first length being greater than or equal to 3 mm and less than or equal to 5 mm.

如申請專利範圍第1項所述的導光板，其中該第一結構面與該第二結構面的相交曲線為圓弧線或橢圓曲線。The light guide plate as described in item 1 of the patent application range, wherein the intersection curve of the first structural surface and the second structural surface is a circular arc or an elliptic curve.

如申請專利範圍第1項所述的導光板，其中該第一結構面在平行該第二方向的一剖面中具有一輪廓線，且該輪廓線為圓弧線或橢圓曲線。The light guide plate as described in item 1 of the patent application range, wherein the first structural surface has a contour line in a cross section parallel to the second direction, and the contour line is a circular arc line or an elliptic curve.

如申請專利範圍第1項所述的導光板，還包括：多個第二條狀微結構，形成於該板體的該第一表面，並位於該第二區域中，其中該些第二條狀微結構沿著該第二方向延伸，並沿著該第一方向排列。The light guide plate as described in item 1 of the patent application scope, further comprising: a plurality of second strip-shaped microstructures formed on the first surface of the plate body and located in the second area, wherein the second strips The micro-structures extend along the second direction and are arranged along the first direction.

如申請專利範圍第8項所述的導光板，其中該些稜鏡狀微結構與各該第二條狀微結構相對應，且呈陣列排列。The light guide plate as described in item 8 of the patent application range, wherein the prism-shaped microstructures correspond to the second strip-shaped microstructures and are arranged in an array.

如申請專利範圍第1項所述的導光板，其中該些散光微結構呈陣列排列。The light guide plate as described in item 1 of the patent application scope, wherein the light-scattering microstructures are arranged in an array.

一種背光模組，包括：一導光板，具有一第一區域與一第二區域，該導光板包括：一板體，具有一第一表面、一第二表面以及一第一側表面，該第一表面與該第二表面彼此相對，該第一側表面連接該第一表面與該第二表面，且該導光板的該第一區域較該第二區域更鄰近於該第一側表面；多個第一條狀微結構，形成於該板體的該第一表面，並位於該第一區域中，其中該些第一條狀微結構沿著一第一方向延伸，並沿著一第二方向排列，該第一方向平行於該第一側表面，該第二方向垂直於該第一方向；多個稜鏡狀微結構，形成於該板體的該第二表面，並位於該第二區域中，其中各該稜鏡狀微結構凹入該第二表面，並具有一第一斜面與一第二斜面，且該些稜鏡狀微結構的該些第一斜面朝向該第一側表面；以及多個散光微結構，形成於該板體的該第二表面，並位於該第一區域中，其中各該散光微結構凹入該第二表面，並具有一第一結構面與一第二結構面，該些散光微結構的該些第一結構面朝向該第一側表面，且該些第一結構面為曲面，該些第二結構面朝向該些稜鏡狀微結構的該些第一斜面；以及一光源，位於該導光板的該第一側表面旁，其中該光源適於提供一光束，該光束經由該第一側表面進入該導光板，且藉由該些第一條狀微結構與該些稜鏡狀微結構的該些第一斜面而改變行進方向，進而自該第一表面離開該導光板。A backlight module includes: a light guide plate having a first area and a second area. The light guide plate includes: a plate body having a first surface, a second surface, and a first side surface, the first A surface and the second surface are opposite to each other, the first side surface connects the first surface and the second surface, and the first area of the light guide plate is closer to the first side surface than the second area; A first strip-shaped microstructure formed on the first surface of the plate and located in the first area, wherein the first strip-shaped microstructures extend along a first direction and along a second Arranged in directions, the first direction is parallel to the first side surface, the second direction is perpendicular to the first direction; a plurality of prism-like microstructures are formed on the second surface of the plate body, and are located on the second In the area, each of the lenticular microstructures is recessed into the second surface, and has a first slanted surface and a second slanted surface, and the first slanted surfaces of the lenticular microstructures face the first side surface And a plurality of astigmatism microstructures formed on the second surface of the plate body and located in the first area, wherein each of the astigmatism microstructures is recessed into the second surface and has a first structure surface and a first Two structural planes, the first structural planes of the astigmatic microstructures face the first side surface, and the first structural planes are curved surfaces, and the second structural planes face the some of the prism-like microstructures A first inclined surface; and a light source located beside the first side surface of the light guide plate, wherein the light source is adapted to provide a light beam, the light beam enters the light guide plate through the first side surface, and through the first strips The micro-structures and the first inclined planes of the micro-structures of the prism shape change the direction of travel, and then leave the light guide plate from the first surface.

如申請專利範圍第11項所述的背光模組，其中各該第一條狀微結構自該第一表面凸出，並具有一第一條狀斜面與一第二條狀斜面，該些第一條狀微結構的該些第一條狀斜面朝向該第一側表面，該些第二條狀斜面朝向該第二區域，各該第一條狀微結構的該第二條狀斜面與該第一表面之間具有一第一夾角，各該稜鏡狀微結構的該第一斜面與該第二表面之間具有一第二夾角，且該第一夾角大於該第二夾角的補角。The backlight module as recited in claim 11 of the patent application, wherein each of the first strip-shaped microstructures protrudes from the first surface and has a first strip-shaped slope and a second strip-shaped slope, and the The first strip-shaped slopes of the strip-shaped microstructures face the first side surface, and the second strip-shaped slopes face the second region, and the second strip-shaped slopes of the first strip-shaped microstructures and the There is a first included angle between the first surfaces, and a second included angle between the first inclined surface and the second surface of each lenticular microstructure, and the first included angle is greater than the complementary angle of the second included angle.

如申請專利範圍第11項所述的背光模組，其中各該第一條狀微結構自該第一表面凸出，並具有一第一條狀斜面與一第二條狀斜面，該些第一條狀微結構的該些第一條狀斜面朝向該第一側表面，該些第二條狀斜面朝向該第二區域，各該第一條狀微結構的該第二條狀斜面與該第一表面之間具有一第一夾角，各該稜鏡狀微結構的該第一斜面與該第二表面之間具有一第二夾角，該第一夾角的角度大於等於2度且小於等於5度，且該第二夾角的補角的角度大於等於2度且小於等於7度。The backlight module as recited in claim 11 of the patent application, wherein each of the first strip-shaped microstructures protrudes from the first surface and has a first strip-shaped slope and a second strip-shaped slope, and the The first strip-shaped slopes of the strip-shaped microstructures face the first side surface, and the second strip-shaped slopes face the second region, and the second strip-shaped slopes of the first strip-shaped microstructures and the There is a first included angle between the first surfaces, and there is a second included angle between the first inclined surface and the second surface of each lenticular microstructure, and the angle of the first included angle is greater than or equal to 2 degrees and less than or equal to 5 Degrees, and the angle of the supplementary angle of the second included angle is greater than or equal to 2 degrees and less than or equal to 7 degrees.

如申請專利範圍第12項所述的背光模組，其中各該第一條狀微結構的該第一條狀斜面與該第一表面之間具有一第三夾角，且該第三夾角的角度大於等於45度且小於等於90度。The backlight module as claimed in item 12 of the patent application range, wherein each first strip-shaped microstructure has a third included angle between the first strip-shaped inclined surface and the first surface, and the angle of the third included angle 45 degrees or more and 90 degrees or less.

如申請專利範圍第11項所述的背光模組，其中該第一區域在該第二方向上具有一第一長度，該第一長度大於等於3毫米且小於等於5毫米。The backlight module according to item 11 of the patent application range, wherein the first area has a first length in the second direction, and the first length is greater than or equal to 3 mm and less than or equal to 5 mm.

如申請專利範圍第11項所述的背光模組，其中該第一結構面與該第二結構面的相交曲線為圓弧線或橢圓曲線。The backlight module as recited in item 11 of the patent application range, wherein the intersection curve of the first structural surface and the second structural surface is a circular arc line or an elliptic curve.

如申請專利範圍第11項所述的背光模組，其中該第一結構面在平行該第二方向的一剖面中具有一輪廓線，且該輪廓線為圓弧線或橢圓曲線。The backlight module according to item 11 of the patent application scope, wherein the first structural surface has a contour line in a cross section parallel to the second direction, and the contour line is a circular arc line or an elliptic curve.

如申請專利範圍第11項所述的背光模組，還包括：多個第二條狀微結構，形成於該板體的該第一表面，並位於該第二區域中，其中該些第二條狀微結構沿著該第二方向延伸，並沿著該第一方向排列。The backlight module as described in item 11 of the patent application scope further includes: a plurality of second strip-shaped microstructures formed on the first surface of the plate body and located in the second area, of which the second The strip-shaped microstructures extend along the second direction and are arranged along the first direction.

如申請專利範圍第18項所述的背光模組，其中該些稜鏡狀微結構與各該第二條狀微結構相對應，且呈陣列排列。The backlight module as recited in item 18 of the patent application range, wherein the prism-shaped microstructures correspond to the second strip-shaped microstructures and are arranged in an array.

如申請專利範圍第11項所述的背光模組，其中該些散光微結構呈陣列排列。The backlight module as described in item 11 of the patent application scope, wherein the astigmatism microstructures are arranged in an array.