TWI522663B

TWI522663B - Light guide plate structure

Info

Publication number: TWI522663B
Application number: TW103114438A
Authority: TW
Inventors: 吳志容; 陳仕勳; 黃冠綸
Original assignee: 光展應材股份有限公司
Priority date: 2014-04-21
Filing date: 2014-04-21
Publication date: 2016-02-21
Also published as: TW201541130A

Description

導光板結構Light guide plate structure

本發明係關於一種導光板結構，尤指一種可提升出光均勻度之導光板結構。The invention relates to a light guide plate structure, in particular to a light guide plate structure capable of improving light uniformity.

按，習知用於液晶顯示器之背光模組係包含有一導光板及一光源，其中，光源可係一LED點光源或一CCFL線光源，並設置於導光板之一入光面，而光源發射之光束由入光面進入導光板後，導光板可利用光的全反射特性，將光束導引至遠端，並利用導光板上的微結構破壞光束的全反射，以將散射之光束射入微結構後可由導光板之出光面射出，因此，導光板即係用以將點光源或線光源轉換成面光源出射，且導光板上微結構之形狀及大小，均會影響光束由出光面射出後之輝度及均勻度，故目前相關業者即發展出不同設計之微結構，以適應各種不同之背光模組。According to the conventional backlight module for a liquid crystal display, a light guide plate and a light source are included, wherein the light source can be an LED point light source or a CCFL line light source, and is disposed on one of the light guide plates, and the light source emits After the light beam enters the light guide plate from the light incident surface, the light guide plate can use the total reflection characteristic of the light to guide the light beam to the far end, and destroy the total reflection of the light beam by using the microstructure on the light guide plate to inject the scattered light beam into the light guide plate. The microstructure can be emitted from the light exit surface of the light guide plate. Therefore, the light guide plate is used to convert the point light source or the line light source into a surface light source, and the shape and size of the microstructure on the light guide plate affect the light beam emitted from the light exit surface. After the brightness and uniformity, the relevant industry has developed different designs of microstructures to adapt to a variety of different backlight modules.

如台灣專利第I271490號即提供一種導光板之微結構，其係從導光板底面向外突出之三角錐狀構造，而台灣專利第I402543號另提供一種具有橢圓形網點之導光板，然而，習知之導光板多係僅具有單一形狀之微結構，其可調整導光板出光之輝度，但對於出光均勻度之提升效果不大，有鑑於此，提供一種出光均勻度較高之導光板，實為目前必要之課題。For example, Taiwan Patent No. I271490 provides a microstructure of a light guide plate which is a triangular pyramidal structure which protrudes outward from the bottom surface of the light guide plate, and Taiwan Patent No. I402543 provides a light guide plate having an elliptical dot, however, It is known that the light guide plate has only a single shape of the microstructure, which can adjust the brightness of the light guide plate, but has little effect on the uniformity of the light output. In view of this, a light guide plate with high light uniformity is provided. The current necessary issues.

為解決上述課題，本發明提供一種導光板結構，其具有兩種不同形狀之網點，可提升導光板之整體出光均勻度。In order to solve the above problems, the present invention provides a light guide plate structure having two different shapes of mesh points, which can improve the overall light uniformity of the light guide plate.

為達前述目的，本發明提供一種導光板結構，係包含：一板體，其具有一入光面、一出光面及一網點設置面，其中，出光面及網點設置面係互相平行，並分別與入光面相交，入光面係用以接收一光源發射之光束，出光面係用以引導光束出射；複數個第一網點，其係半橄欖球形，並交錯地設於網點設置面上，其中，該些第一網點各具有一長軸，各該長軸係互相平行，並皆係垂直於入光面；以及複數個第二網點，其具有一半圓弧面，並設於網點設置面，其中，任一個第二網點係設於任一個第一網點之周圍。In order to achieve the above objective, the present invention provides a light guide plate structure, comprising: a plate body having a light incident surface, a light exit surface, and a mesh point setting surface, wherein the light exit surface and the mesh point setting surface are parallel to each other, and respectively Intersecting with the light incident surface, the light incident surface is for receiving a light beam emitted by a light source, and the light exiting surface is for guiding the light beam to exit; the plurality of first mesh points are half rugby-shaped, and are arranged alternately on the mesh setting surface. The first mesh points each have a long axis, and the long axis lines are parallel to each other and are perpendicular to the light incident surface; and the plurality of second mesh dots have a half arc surface and are disposed on the mesh point setting surface. , wherein any one of the second network points is disposed around any of the first network points.

藉由上述，當光源發射之光束由板體之入光面進入板體後，板體可利用光的全反射特性，將光束導引至遠端，並利用板體上的各個第一網點及第二網點破壞光束的全反射，以將散射之光束射入第一網點或第二網點後可由板體之出光面射出，其中，本發明之第一網點係半橄欖球形，第二網點係具有一半圓弧面，使得射入第一網點後之光束反射至出光面射出時之折射角，係小於射入第二網點後之光束反射至出光面射出時之折射角，藉此，第一網點相對於第二網點係較具有聚光之效果，而第二網點相對於第一網點係較具有散光之效果，因此，藉由本發明兩種不同形狀之第一網點及第二網點，可增加整體板體出光之均勻度。According to the above, when the light beam emitted by the light source enters the plate body from the light incident surface of the plate body, the plate body can utilize the total reflection characteristic of the light to guide the light beam to the distal end, and utilize the first mesh points on the plate body and The second halftone dot destroys the total reflection of the light beam to inject the scattered light beam into the first halftone point or the second halftone point, and is emitted from the light exiting surface of the plate body, wherein the first halftone dot of the present invention is a half rugby ball shape, and the second mesh point has a half arc surface, such that the beam reflected from the first dot is reflected to the angle of refraction when the light exits, and is smaller than the angle of refraction when the beam incident on the second dot is reflected to the exit surface, whereby the first dot Compared with the second halftone dot system, the second mesh dot has the effect of astigmatism, and therefore, the first mesh dot and the second mesh dot of the two different shapes of the present invention can increase the overall The uniformity of light output from the board.

為便於說明本發明於上述發明內容一欄中所表示的中心思想，茲以具體實施例表達。實施例中各種不同物件係按適於列舉說明之比例，而非按實際元件的比例予以繪製，合先敘明。For the convenience of the description, the central idea expressed by the present invention in the column of the above summary of the invention is expressed by the specific embodiments. The various items in the examples are drawn to scale in the description and not to the actual elements, and are described in the foregoing.

請參閱圖1至圖4、及圖6所示，本發明提供一種導光板結構，係包含：Referring to FIG. 1 to FIG. 4 and FIG. 6 , the present invention provides a light guide plate structure, which comprises:

一板體10，其具有一入光面11、一出光面12及一網點設置面13，其中，出光面12及網點設置面13係互相平行，並分別與入光面11相交，入光面11係用以接收一光源(圖中未示)發射之光束，光源可係如LED之點光源，或CCFL之線光源，出光面12係用以引導光束出射，而網點設置面13設有複數條以一第一間距L1等間隔設置之第一軸線14、以及複數條以一第二間距L2等間隔設置之第二軸線15，該些第一軸線14與該些第二軸線15係互相垂直，並交叉形成複數個交點，如圖3所示，且該些第二軸線15係平行於入光面11及網點設置面13相交之一邊線16。a plate body 10 having a light-incident surface 11, a light-emitting surface 12, and a dot-setting surface 13, wherein the light-emitting surface 12 and the dot-setting surface 13 are parallel to each other and intersect with the light-incident surface 11, respectively, into the light surface. The 11 system is configured to receive a light beam emitted by a light source (not shown), the light source may be a point light source such as an LED, or a line source of a CCFL, and the light exit surface 12 is used to guide the light beam to exit, and the dot setting surface 13 is provided with a plurality of a first axis 14 disposed at equal intervals of a first interval L1 and a plurality of second axes 15 equally spaced apart by a second spacing L2, the first axes 14 and the second axes 15 being perpendicular to each other And intersecting to form a plurality of intersection points, as shown in FIG. 3, and the second axes 15 are parallel to one of the intersections 16 of the light incident surface 11 and the halftone placement surface 13.

複數個第一網點20，其係半橄欖球形，並交錯地設於網點設置面13之各個交點上，使得位於該些第二軸線15上之第一網點20，與相鄰第二軸線15上之第一網點20係呈錯位排列，如圖2及圖3所示，其中，該些第一網點20各具有一長軸21及一短軸22，各長軸21係小於3mm，各短軸22係小於1.5mm，各長軸21與短軸22可垂直相交於一中心點23，且各中心點23係位於交點上，各長軸21係與第一軸線14相疊，各短軸22係與第二軸線15相疊，而第一網點20之中心點23與相鄰並位於同一第二軸線15之第一網點20之中心點23，係具有一第三間距L3，其中，各第三間距L3係相同，並係第一間距L1之兩倍，而各第三間距L3可係大於或小於第二間距L2，於本發明之較佳實施例中，各第三間距L3係大於第二間距L2，如圖3所示。a plurality of first net dots 20, which are half-football-shaped and are alternately disposed at respective intersections of the dot setting faces 13 such that the first dots 20 on the second axes 15 and the adjacent second axes 15 The first mesh points 20 are arranged in a wrong position, as shown in FIG. 2 and FIG. 3 , wherein the first mesh points 20 each have a long axis 21 and a short axis 22, and each long axis 21 is less than 3 mm, and each short axis 22 is less than 1.5 mm, each major axis 21 and short axis 22 can intersect perpendicularly to a center point 23, and each center point 23 is located at an intersection, and each long axis 21 is overlapped with the first axis 14, each short axis 22 And the second point 15 is overlapped, and the center point 23 of the first half point 20 and the center point 23 of the first half point 20 adjacent to and located at the same second axis 15 have a third spacing L3, wherein each The three pitches L3 are the same, and are twice the first pitch L1, and each of the third pitches L3 may be greater or smaller than the second pitch L2. In the preferred embodiment of the present invention, each of the third pitches L3 is greater than The two spacings L2 are shown in Figure 3.

本發明之該些第一網點20可凸出於網點設置面13，如圖4所示，該些第一網點20遠離網點設置面13之一側各具有兩個弧線24，該兩弧線24之一端可相接於一接點26，而另一端可分別與短軸22之兩端相連接，且該些第一網點20各具有分別與該兩弧線24相切之兩切線25，該兩切線25係可相交，而相交角度θ係介於60度~150度之間，且各該第一網點20之中心點23與接點26之垂直距離係介於0.01mm~0.1mm之間。The first mesh points 20 of the present invention may protrude from the dot setting surface 13 . As shown in FIG. 4 , the first mesh points 20 have two arcs 24 on one side of the mesh point setting surface 13 , and the two arcs 24 One end can be connected to a contact point 26, and the other end can be respectively connected to both ends of the short axis 22, and the first mesh points 20 each have two tangent lines 25 respectively tangent to the two arc lines 24, the two tangent lines The 25 series can intersect, and the intersection angle θ is between 60 degrees and 150 degrees, and the vertical distance between the center point 23 of each of the first dots 20 and the contact 26 is between 0.01 mm and 0.1 mm.

複數個第二網點30，其設於網點設置面13，並具有一半圓弧面，其中，該些第二網點30可係半圓球形，或係圓柱形，於本發明之較佳實施例中，該些第二網點30係半圓球形，如圖4所示，而該些第二網點30之直徑係介於0.01mm~0.2mm之間，且任一個第二網點30係設於任一個第一網點20之周圍，如圖1至圖4之實施例所示，即係將各個第二網點30設於兩個第一網點20之間之交點上，而圖6之另一實施例，則係將各個第二網點30無規則性地設於各個第一網點20周圍。a plurality of second dots 30 are disposed on the dot setting surface 13 and have a semicircular surface, wherein the second dots 30 may be semi-spherical or cylindrical, in a preferred embodiment of the present invention, The second mesh points 30 are semi-spherical, as shown in FIG. 4, and the second mesh points 30 have a diameter of between 0.01 mm and 0.2 mm, and any one of the second mesh points 30 is provided in any one of the first Around the dot 20, as shown in the embodiment of FIGS. 1 to 4, each second dot 30 is disposed at the intersection between the two first dots 20, and another embodiment of FIG. Each of the second halftone dots 30 is irregularly disposed around each of the first halftone dots 20.

以上即為本發明之結構及形狀概述，並將本發明所能達成之功效原理及使用方法陳述如下：The above is an overview of the structure and shape of the present invention, and the principle of use and the method of use that can be achieved by the present invention are as follows:

本發明之各個第一網點20及第二網點30係以機械加工、雷射或蝕刻之方式設於板體10之網點設置面13，使得各個第一網點20及第二網點30可係同時凸出於網點設置面13，或係同時凹入於網點設置面13，而本發明之較佳實施例中，各個第一網點20及第二網點30係同時凸出於網點設置面13，如圖1及圖4所示，此外，網點設置面13上各個第一網點20之大小可係完全相同，如圖1至圖3所示，亦可係如圖6所示，各個第一網點20之大小係無規則性地設於網點設置面13上。Each of the first mesh points 20 and the second half dots 30 of the present invention is disposed on the halftone setting surface 13 of the board body 10 by machining, laser or etching, so that the first first mesh points 20 and the second half dots 30 can be simultaneously convex. In the preferred embodiment of the present invention, each of the first halftone points 20 and the second halftones 30 are simultaneously protruded from the halftone dot setting surface 13 as shown in the figure. 1 and FIG. 4, in addition, the size of each first dot 20 on the dot setting surface 13 may be completely the same, as shown in FIG. 1 to FIG. 3, or may be as shown in FIG. The size is irregularly arranged on the halftone setting surface 13.

請參閱圖5所示，當光源發射之光束由板體10之入光面11進入板體10後，板體10可利用光的全反射特性，將光束導引至遠端，並利用網點設置面13上的各個第一網點20及第二網點30破壞光束的全反射，以將散射之光束射入第一網點20或第二網點30後可由板體10之出光面12射出，使得板體10可將點光源或線光源之光源轉換成面光源出射。Referring to FIG. 5, when the light beam emitted by the light source enters the board body 10 from the light incident surface 11 of the board body 10, the board body 10 can utilize the total reflection characteristic of the light to guide the light beam to the far end, and use the dot setting. Each of the first mesh points 20 and the second half dots 30 on the surface 13 breaks the total reflection of the light beam, and the scattered light beam is incident on the first mesh point 20 or the second half dot 30, and can be emitted from the light exit surface 12 of the plate body 10, so that the plate body 10 can convert the light source of the point source or the line source into a surface source.

而本發明之第一網點20係半橄欖球形，第二網點30係半圓球形，使得射入第一網點20後之光束反射至出光面12射出時之折射角θ1，係小於射入第二網點30後之光束反射至出光面12射出時之折射角θ2，藉此，第一網點20相對於第二網點30係較具有聚光之效果，而第二網點30相對於第一網點20係較具有散光之效果，且任一個第二網點30可設於任一個第一網點20之周圍，因此，藉由本發明兩種不同形狀之第一網點20及第二網點30，可增加整體板體10出光之均勻度。The first half point 20 of the present invention is a semi- rugby ball shape, and the second half point 30 is semi-spherical, so that the light beam incident on the first half point 20 is reflected to the refraction angle θ1 when the light exit surface 12 is emitted, which is smaller than the second mesh point. The light beam after 30 is reflected to the refraction angle θ2 when the light exit surface 12 is emitted, whereby the first halftone dot 20 has a light collecting effect with respect to the second halftone dot 30, and the second halftone dot 30 is relatively thinner than the first halftone dot 20 The effect of astigmatism is provided, and any one of the second halftone dots 30 can be disposed around any one of the first halftone dots 20. Therefore, by using the first mesh point 20 and the second halftone dot 30 of the two different shapes of the present invention, the integral plate body 10 can be added. Uniformity of light output.

綜上所述，本發明提供一種導光板結構，其板體10具有複數個半橄欖球形之第一網點20及複數個半圓球形之第二網點30，且任一個第二網點30可設於任一個第一網點20之周圍，使得藉由本發明之導光板結構可提升板體10之整體出光均勻度。In summary, the present invention provides a light guide plate structure, the plate body 10 has a plurality of half-football-shaped first halftone dots 20 and a plurality of semi-spherical spherical second mesh dots 30, and any one of the second mesh dots 30 can be set in any The periphery of a first dot 20 allows the overall light uniformity of the panel 10 to be improved by the light guide plate structure of the present invention.

以上所舉實施例僅用以說明本發明而已，非用以限制本發明之範圍。舉凡不違本發明精神所從事的種種修改或變化，俱屬本發明意欲保護之範疇。The above embodiments are merely illustrative of the invention and are not intended to limit the scope of the invention. Any modifications or variations that are made without departing from the spirit of the invention are intended to be protected.

10‧‧‧板體
11‧‧‧入光面
12‧‧‧出光面
13‧‧‧網點設置面
14‧‧‧第一軸線
15‧‧‧第二軸線
16‧‧‧邊線
20‧‧‧第一網點
21‧‧‧長軸
22‧‧‧短軸
23‧‧‧中心點
24‧‧‧弧線
25‧‧‧切線
26‧‧‧接點
30‧‧‧第二網點
L1‧‧‧第一間距
L2‧‧‧第二間距
L3‧‧‧第三間距10‧‧‧ board
11‧‧‧Into the glossy surface
12‧‧‧Glossy
13‧‧‧Network setting surface
14‧‧‧first axis
15‧‧‧second axis
16‧‧‧Edge
20‧‧‧First outlet
21‧‧‧ long axis
22‧‧‧ Short axis
23‧‧‧ center point
24‧‧‧ arc
25‧‧‧tangential
26‧‧‧Contacts
30‧‧‧Second outlets
L1‧‧‧ first spacing
L2‧‧‧second spacing
L3‧‧‧ third spacing

圖1係本發明之立體示意圖。圖2係本發明之底視圖。圖3係本發明圖2之局部放大圖。圖4係本發明圖2之4-4剖面線暨箭頭方向之局部剖示圖。圖5係本發明之運作示意圖。圖6係本發明之另一實施例。Figure 1 is a schematic perspective view of the present invention. Figure 2 is a bottom view of the present invention. Figure 3 is a partial enlarged view of Figure 2 of the present invention. Figure 4 is a partial cross-sectional view showing the direction of the line 4-4 of Figure 2 of the present invention and the direction of the arrow. Figure 5 is a schematic illustration of the operation of the present invention. Figure 6 is another embodiment of the present invention.

10‧‧‧板體 10‧‧‧ board

11‧‧‧入光面 11‧‧‧Into the glossy surface

12‧‧‧出光面 12‧‧‧Glossy

13‧‧‧網點設置面 13‧‧‧Network setting surface

16‧‧‧邊線 16‧‧‧Edge

20‧‧‧第一網點 20‧‧‧First outlet

30‧‧‧第二網點 30‧‧‧Second outlets

Claims

一種導光板結構，係包含：一板體，其具有一入光面、一出光面及一網點設置面，其中，該出光面及該網點設置面係互相平行，並分別與該入光面相交，而該入光面係用以接收一光源發射之光束，該出光面係用以引導光束出射；複數個第一網點，其係半橄欖球形，並設於該網點設置面，其中，該些第一網點各具有一長軸，各該長軸係互相平行，並皆係垂直於該入光面；以及複數個第二網點，其具有一半圓弧面，並設於該網點設置面，其中，任一個該第二網點係設於任一個該第一網點之周圍，而射入該些第一網點後之光束反射至該出光面射出時之折射角，係小於射入該些第二網點後之光束反射至該出光面射出時之折射角。 A light guide plate structure comprises: a plate body having a light incident surface, a light exit surface and a mesh point setting surface, wherein the light exit surface and the mesh point setting surface are parallel to each other and respectively intersect the light incident surface And the light incident surface is configured to receive a light beam emitted by a light source, wherein the light exiting surface is used to guide the light beam to exit; the plurality of first mesh points are half rugby-shaped, and are disposed on the dot setting surface, wherein Each of the first mesh points has a long axis, each of the long axis lines being parallel to each other and perpendicular to the light incident surface; and a plurality of second mesh points having a half arc surface and disposed on the mesh point setting surface, wherein Any one of the second network points is disposed around any one of the first network points, and the light beam that is incident on the first network points is reflected to the angle of refraction when the light exiting surface is emitted, and is smaller than the second network point The rear beam is reflected to the angle of refraction when the exit surface is emitted.

如請求項1所述之導光板結構，其中，該網點設置面設有複數條以一第一間距等間隔設置之第一軸線、以及複數條以一第二間距等間隔設置之第二軸線，該些第一軸線與該些第二軸線係互相垂直，並交叉形成複數個交點，而該些第一網點係錯位地設於該些交點上。 The light guide plate structure of claim 1, wherein the dot setting surface is provided with a plurality of first axes arranged at equal intervals at a first interval, and a plurality of second axes equally spaced at a second interval. The first axis and the second axes are perpendicular to each other and intersect to form a plurality of intersections, and the first dots are offset from the intersections.

如請求項2所述之導光板結構，其中，該些第一網點各具有一與該長軸垂直之短軸，各該長軸與該短軸可垂直相交於一中心點，而各該中心點係位於該交點上，各該長軸係與該第一軸線相疊，各該短軸係與該第二軸線相疊，且各該第一網點之中心點與相鄰並位於同一第二軸線之第一網點之中心點，係具有一第三間距，各該第三間距係相同，且各該第三間距係該第一間距之兩倍。 The light guide plate structure of claim 2, wherein the first mesh points each have a short axis perpendicular to the long axis, and each of the long axes and the short axis can vertically intersect at a center point, and each of the centers Point points are located at the intersection, each of the major axis lines is overlapped with the first axis, each of the short axis lines is overlapped with the second axis, and a center point of each of the first mesh points is adjacent to and adjacent to the second The center point of the first dot of the axis has a third pitch, each of the third pitches being the same, and each of the third pitches is twice the first pitch.

如請求項3所述之導光板結構，其中，各該第三間距係大於該第二間距。 The light guide plate structure of claim 3, wherein each of the third pitches is greater than the second pitch.

如請求項3所述之導光板結構，其中，各該第三間距係小於該第二間距。 The light guide plate structure of claim 3, wherein each of the third pitches is smaller than the second pitch.

如請求項3所述之導光板結構，其中，該些第一網點之長軸係小於3mm，而該些第一網點之短軸係小於1.5mm。 The light guide plate structure of claim 3, wherein the first mesh points have a major axis of less than 3 mm, and the first mesh points have a minor axis of less than 1.5 mm.

如請求項3所述之導光板結構，其中，該些第二網點之直徑係介於0.01mm~0.2mm之間。 The structure of the light guide plate of claim 3, wherein the diameters of the second dots are between 0.01 mm and 0.2 mm.

如請求項3所述之導光板結構，其中，該些第一網點遠離該網點設置面之一側各具有兩個弧線，該兩弧線之一端可相接於一接點，而另一端可分別與該短軸之兩端相連接，且該些第一網點各具有分別與該兩弧線相切之兩切線，該兩切線係可相交，且相交角度係介於60度~150度之間。 The light guide plate structure of claim 3, wherein the first mesh points have two arcs away from one side of the mesh point setting surface, one end of the two arc lines can be connected to one contact, and the other end can be respectively separated Connected to both ends of the short axis, and the first mesh points each have two tangent lines respectively tangent to the two arc lines, the two tangent lines can intersect, and the intersecting angle is between 60 degrees and 150 degrees.

如請求項8所述之導光板結構，其中，各該第一網點之中心點與該接點之垂直距離係介於0.01mm~0.1mm之間。 The structure of the light guide plate of claim 8, wherein a vertical distance between a center point of each of the first dots and the contact is between 0.01 mm and 0.1 mm.