TWI678561B - Light mixing lens - Google Patents
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- TWI678561B TWI678561B TW108108481A TW108108481A TWI678561B TW I678561 B TWI678561 B TW I678561B TW 108108481 A TW108108481 A TW 108108481A TW 108108481 A TW108108481 A TW 108108481A TW I678561 B TWI678561 B TW I678561B
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Abstract
一種混光透鏡,包括入光側、出光側及環形側壁。環形側壁具有凹向上段及凹向下段,凹向上段的第一下緣連接入光側。凹向下段的第二上緣及第二下緣分別連接出光側及凹向上段的第一上緣。凹向上段的第一內反射面及凹向下段的第二內反射面上配置有側凹部,側凹部由第一下緣延伸至第二上緣,側凹部具有第一側緣、第二側緣及連接第一側緣及第二側緣的反射凹面。在側凹部的一剖面上,第一側緣及第二側緣之間的直線的長度為2a,直線上的相異兩點的距離為L1,且相異兩點到反射凹面上的一點的距離分別為L2及L3,L2與L3的和為2a,2a大於L1。A light mixing lens includes a light entrance side, a light exit side, and a ring-shaped side wall. The annular side wall has a concave upper section and a concave lower section, and the first lower edge of the concave upper section is connected to the light-entering side. The second upper edge and the second lower edge of the concave lower segment are respectively connected to the light emitting side and the first upper edge of the concave upper segment. Side concave portions are disposed on the first internal reflection surface concave upward and on the second internal reflection surface concave downward. The side concave portion extends from the first lower edge to the second upper edge. The side concave portion has a first side edge and a second side. Edge and a reflective concave surface connecting the first side edge and the second side edge. In a section of the undercut, the length of the straight line between the first and second sides is 2a, the distance between the two points on the line is L1, and the distance from the two points to a point on the reflective concave surface The distances are L2 and L3, the sum of L2 and L3 is 2a, and 2a is greater than L1.
Description
本發明關於一種透鏡,尤其是指一種混光透鏡。 The invention relates to a lens, in particular to a light-mixing lens.
全內反射透鏡(total internal reflection lens)針對廣照射面積進行設計時,是藉由控制內全反射面的入射角,使得光跡交叉而達到較大的照度半角。混光透鏡的設計理念則是將不同波長的光作疊加以形成白光,故將光跡設計朝同一位置聚集的型態,以將不同波長的光聚焦在同一位置。由於廣照射面積與混光的基本設計原理的不同,使得現有技術的全內反射透鏡在針對多晶片光源或紅綠藍白型彩光光源之廣照射面積的需求進行設計時,會因為光跡交叉過多而導致混光不均勻的問題。因此,現有技術尚未能提供可兼顧混光與廣照射面積的需求的透鏡。 The total internal reflection lens is designed for a wide irradiation area by controlling the incident angle of the internal total reflection surface so that the light traces cross to achieve a larger half angle of illumination. The design concept of the light mixing lens is to superimpose light of different wavelengths to form white light, so the light traces are designed to focus on the same position to focus the light of different wavelengths on the same position. Due to the difference between the basic design principle of the wide irradiation area and the mixed light, when designing the wide irradiation area of a multi-chip light source or a red, green, blue, and white color light source in the prior art, the total internal reflection lens will have a light trace Excessive crossover causes uneven light mixing. Therefore, the prior art has not been able to provide a lens that can meet the requirements of both mixed light and wide irradiation area.
本「先前技術」段落只是用來幫助瞭解本發明內容,因此在「先前技術」中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。此外,在「先前技術」中所揭露的內容並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,也不代表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。 This "prior art" paragraph is only used to help understand the content of the present invention, so the content disclosed in the "prior art" may include some conventional technologies that do not constitute the ordinary knowledge of those skilled in the art. In addition, the content disclosed in the "prior art" does not represent the content or the problem to be solved by one or more embodiments of the present invention, nor does it mean that prior to the application of the present invention, it has been used by those with ordinary knowledge in the technical field to which it belongs. Know or know.
本發明提供一種混光透鏡,可兼顧對於多晶片光源或紅綠藍白型彩光光源的混光與廣照射面積的需求。 The invention provides a light mixing lens, which can meet the requirements for the mixed light and wide irradiation area of a multi-chip light source or a red, green, blue, and white color light source.
本發明所提供混光透鏡包括入光側、出光側以及環形側壁。環形側壁連接於入光側及出光側之間且具有凹向上段及凹向下段,凹向上段具有第一上緣、第一下緣及連接於第一上緣及第一下緣之間的第一內反射面,第一下緣連接入光側。凹向下段具有第二上緣、第二下緣及連接於第二上緣及第二下緣之間的第二內反射面,第二上緣連接出光側,第二下緣連接第一上緣。第一內反射面及第二內反射面上配置有多個側凹部,各側凹部由第一下緣延伸至第二上緣,各側凹部具有第一側緣、第二側緣及連接於第一側緣及第二側緣之間的反射凹面。在各側凹部的一剖面上,第一側緣及第二側緣之間形成長度為2a的直線,直線上的相異兩點的距離為L1,且相異兩點到反射凹面上的一點的距離分別為L2及L3,L2與L3的和為2a,且2a大於L1。 The light-mixing lens provided by the present invention includes a light-entering side, a light-exiting side, and an annular side wall. The annular side wall is connected between the light entrance side and the light exit side and has a concave upper section and a concave downward section. The concave upper section has a first upper edge, a first lower edge, and a first upper edge and a first lower edge. The first internal reflection surface and the first lower edge are connected to the light incident side. The concave downward section has a second upper edge, a second lower edge, and a second internal reflecting surface connected between the second upper edge and the second lower edge. The second upper edge is connected to the light-emitting side, and the second lower edge is connected to the first upper. edge. A plurality of undercut portions are arranged on the first and second inner reflection surfaces, each undercut portion extends from a first lower edge to a second upper edge, each undercut portion has a first side edge, a second side edge, and is connected to A reflective concave surface between the first side edge and the second side edge. On a section of each side recess, a straight line with a length of 2a is formed between the first side edge and the second side edge. The distance between the two points on the line is L1, and the two points on the line reach a point on the reflective concave surface. The distances are L2 and L3, and the sum of L2 and L3 is 2a, and 2a is greater than L1.
在本發明的一實施例中,上述的入光側與出光側沿第一軸排列,第一軸、第二軸及第三軸相交於交點且相互垂直,第二軸與第三軸所構成的平面與各側凹部相交形成上述的各側凹部的剖面。 In an embodiment of the present invention, the light incident side and the light exit side are arranged along a first axis, the first axis, the second axis, and the third axis intersect at an intersection and are perpendicular to each other, and the second axis and the third axis are formed The plane intersecting with each undercut forms the cross section of each undercut described above.
在本發明的一實施例中,上述的各側凹部的第一側緣與第二側緣之間的距離由出光側朝入光側的方向逐漸增加。 In an embodiment of the present invention, a distance between the first side edge and the second side edge of each of the side concave portions is gradually increased from a light exit side toward a light entrance side.
在本發明的一實施例中,上述的第一內反射面、第二內反射面及反射凹面為全反射面。 In an embodiment of the present invention, the first internal reflection surface, the second internal reflection surface, and the reflective concave surface are total reflection surfaces.
在本發明的一實施例中,上述的入光側更包括底凹部,底凹部由入光側朝出光側延伸。 In an embodiment of the present invention, the light incident side further includes a bottom concave portion, and the bottom concave portion extends from the light incident side toward the light exit side.
在本發明的一實施例中,上述的底凹部更包括頂面及環側面,環側面具有相對兩端,環側面的其中一端與頂面相接,環側面的另一端環繞形成底開口,底開口的孔徑大於頂面的直徑。 In an embodiment of the present invention, the bottom concave portion further includes a top surface and a side surface of the ring. The side surface of the ring has opposite ends. One end of the side surface of the ring is connected to the top surface. The other end of the side surface of the ring surrounds to form a bottom opening. The diameter of the opening is larger than the diameter of the top surface.
在本發明的一實施例中,上述的出光側更包括頂凹部及出光面,頂凹部由出光側朝入光側延伸,且出光面配置於頂凹部的周圍。 In an embodiment of the present invention, the light emitting side further includes a top concave portion and a light emitting surface, the top concave portion extends from the light emitting side toward the light incident side, and the light emitting surface is arranged around the top concave portion.
在本發明的一實施例中,上述的頂凹部更包括底面及環側面,環側面具有相對兩端,環側面的其中一端與底面相接,環側面的另一端環繞形成頂開口,頂開口的孔徑大於底面的直徑,且出光面配置於頂凹部的頂開口的周圍。 In an embodiment of the present invention, the top concave portion further includes a bottom surface and a side surface of the ring. The side surface of the ring has opposite ends. One end of the side surface of the ring is connected to the bottom surface. The other end of the side surface of the ring surrounds the top opening. The aperture is larger than the diameter of the bottom surface, and the light emitting surface is arranged around the top opening of the top concave portion.
在本發明的一實施例中,上述的混光透鏡更包括多個配置於出光側的光擴散微結構。 In an embodiment of the present invention, the above-mentioned light-mixing lens further includes a plurality of light-diffusing microstructures disposed on the light-exiting side.
在本發明的一實施例中,上述的光擴散微結構排列成蜂巢狀。 In an embodiment of the present invention, the light diffusion microstructures are arranged in a honeycomb shape.
藉由環形側壁的凹向上段、凹向下段及側凹部,多晶片光源或紅綠藍白型彩光光源所發出的光線在通過本發明的混光透鏡後可形成混合均勻且具有廣照射面積的射出光。因此,本發明的混光透鏡可兼顧對於多晶片光源或紅綠藍白型彩光光源的混光與廣照射面積的需求。 Through the concave upper part, concave lower part and side concave part of the annular side wall, the light emitted by the multi-chip light source or the red, green, blue, and white colored light source can pass through the light mixing lens of the present invention to form a uniform mixture and have a wide irradiation area. Emitted light. Therefore, the light-mixing lens of the present invention can meet the requirements for the mixed light of a multi-chip light source or a red-green-blue-white color light source and a wide irradiation area.
為讓本發明之上述和其他目的、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 and other objects, features, and advantages of the present invention more comprehensible, embodiments are described below in detail with reference to the accompanying drawings, as follows.
10‧‧‧混光透鏡 10‧‧‧ mixed light lens
110‧‧‧入光側 110‧‧‧Incoming light side
111‧‧‧底凹部 111‧‧‧ bottom recess
1111‧‧‧頂面 1111‧‧‧Top
1112‧‧‧環側面 1112‧‧‧Side of the ring
1113‧‧‧底開口 1113‧‧‧ bottom opening
120‧‧‧出光側 120‧‧‧light side
121‧‧‧頂凹部 121‧‧‧Top recess
1211‧‧‧底面 1211‧‧‧ Underside
1212‧‧‧環側面 1212‧‧‧Side of the ring
1213‧‧‧頂開口 1213‧‧‧Top opening
122‧‧‧出光面 122‧‧‧Outside
130‧‧‧環形側壁 130‧‧‧ annular side wall
131‧‧‧凹向上段 131‧‧‧ concave upward
1311‧‧‧第一內反射面 1311‧‧‧First internal reflection surface
132‧‧‧凹向下段 132‧‧‧ concave down
1321‧‧‧第二內反射面 1321‧‧‧Second internal reflection surface
133‧‧‧側凹部 133‧‧‧ undercut
1331‧‧‧第一側緣 1331‧‧‧First side edge
1332‧‧‧第二側緣 1332‧‧‧Second side edge
1333‧‧‧反射凹面 1333‧‧‧Reflective concave surface
140‧‧‧光擴散微結構 140‧‧‧light diffusion microstructure
20‧‧‧光源 20‧‧‧ light source
A、B、P‧‧‧點 A, B, P‧‧‧ points
C、E‧‧‧區域 Areas C, E‧‧‧
D-D‧‧‧割線 D-D‧‧‧ Secant
D1、D2‧‧‧直徑 D1, D2‧‧‧ diameter
R1、R2‧‧‧孔徑 R1, R2‧‧‧ aperture
X‧‧‧第二軸 X‧‧‧Second axis
Y‧‧‧第三軸 Y‧‧‧ third axis
Z‧‧‧第一軸 Z‧‧‧ first axis
圖1為本發明一實施例的混光透鏡的立體外觀示意圖;圖2為本發明一實施例的混光透鏡的側視平面示意圖;圖3為圖2中C區域的放大圖; 圖4為本發明一實施例的混光透鏡的下視平面示意圖;圖5為沿圖2中D-D割線的剖面圖;圖6為圖5中E區域的放大圖;圖7為本發明一實施例的混光透鏡的使用示意圖;以及圖8為本發明一實施例的混光透鏡的上視平面示意圖。 1 is a schematic perspective view of a mixed light lens according to an embodiment of the present invention; FIG. 2 is a schematic side plan view of a mixed light lens according to an embodiment of the present invention; FIG. 3 is an enlarged view of a region C in FIG. 2; 4 is a schematic bottom plan view of a light mixing lens according to an embodiment of the present invention; FIG. 5 is a cross-sectional view taken along a DD secant line in FIG. 2; FIG. 6 is an enlarged view of an E area in FIG. 5; FIG. 8 is a schematic diagram of a top view of a mixed lens according to an embodiment of the present invention.
有關本發明的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、頂、底、側等,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 of a preferred embodiment with reference to the accompanying drawings. The directional terms mentioned in the following embodiments, such as: up, down, top, bottom, side, etc., are only directions referring to the attached drawings. Therefore, the directional terms used are used to illustrate and not to limit the present invention.
圖1為本發明一實施例的混光透鏡的立體外觀示意圖。圖2為本發明一實施例的混光透鏡的側視平面示意圖。圖3為圖2中C區域的放大圖。圖4為本發明一實施例的混光透鏡的下視平面示意圖。圖5為沿圖2中D-D割線的剖面圖。圖6為圖5中E區域的放大圖。圖7為本發明一實施例的混光透鏡的使用示意圖。請參考圖1至7,本實施例的混光透鏡10包括入光側110、出光側120及環形側壁130。環形側壁130連接於入光側110及出光側120之間,且具有凹向上段131及凹向下段132。凹向上段131具有第一上緣、第一下緣及連接於第一上緣及第一下緣之間的第一內反射面1311,第一下緣連接入光側110。凹向下段132具有第二上緣、第二下緣及連接於第二上緣及第二下緣之間的第二內反射面1321,第二上緣連接出光側120,第二下緣連接第一上緣。第一內反射面1311及第二內反射面1321上配置有多個側凹部133,各側凹部133由第一下緣延伸至第二上緣,各側凹部133具有第一側緣1331、第二側緣1332及連接於第一側緣1331及第二側緣1332之間的反射凹 面1333。在各側凹部133的剖面上,第一側緣1331及第二側緣1332之間連接形成直線,直線的長度為2a,直線上的相異A、B兩點的距離為L1(圖未標示),相異A、B兩點到反射凹面1333上的P點的距離分別為L2(圖未標示)及L3(圖未標示),L2與L3的和為2a,且2a大於L1;也就是說,在各側凹部133的剖面上,第一側緣1331及第二側緣1332之間連接形成的直線及反射凹面1333之間的關係符合橢圓方程式,在各側凹部133的剖面上,第一側緣1331及第二側緣1332之間連接形成的直線及反射凹面1333構成半橢圓形。此外,第一內反射面1311、第二內反射面1321及反射凹面1333為全反射面。另外,混光透鏡10的材質可為玻璃或塑料。 FIG. 1 is a schematic perspective view of a light mixing lens according to an embodiment of the present invention. FIG. 2 is a schematic side plan view of a light mixing lens according to an embodiment of the present invention. FIG. 3 is an enlarged view of a region C in FIG. 2. 4 is a schematic bottom plan view of a light mixing lens according to an embodiment of the present invention. Fig. 5 is a cross-sectional view taken along the line D-D in Fig. 2. FIG. 6 is an enlarged view of an E area in FIG. 5. FIG. 7 is a schematic diagram of using a light mixing lens according to an embodiment of the present invention. Please refer to FIGS. 1 to 7. The light mixing lens 10 of this embodiment includes a light incident side 110, a light exit side 120, and an annular side wall 130. The annular side wall 130 is connected between the light-incident side 110 and the light-exit side 120 and has a concave upper section 131 and a concave downward section 132. The concave upper section 131 has a first upper edge, a first lower edge, and a first internal reflection surface 1311 connected between the first upper edge and the first lower edge. The first lower edge is connected to the light-incoming side 110. The concave lower section 132 has a second upper edge, a second lower edge, and a second internal reflecting surface 1321 connected between the second upper edge and the second lower edge. The second upper edge is connected to the light emitting side 120 and the second lower edge is connected. First upper edge. The first internal reflection surface 1311 and the second internal reflection surface 1321 are provided with a plurality of undercut portions 133. Each undercut portion 133 extends from a first lower edge to a second upper edge. Each undercut portion 133 has a first side edge 1331, a first Two side edges 1332 and a reflective recess connected between the first side edge 1331 and the second side edge 1332 面 1333. In the cross section of each side recess 133, a straight line is formed between the first side edge 1331 and the second side edge 1332. The length of the straight line is 2a, and the distance between the two points A and B on the straight line is L1 (not shown in the figure). ), The distances between the two different points A and B to the point P on the reflective concave surface 1333 are L2 (not labeled) and L3 (not labeled), and the sum of L2 and L3 is 2a, and 2a is greater than L1; that is, That is, in the cross section of each side recess 133, the relationship between the straight line formed by the connection between the first side edge 1331 and the second side edge 1332 and the reflective concave surface 1333 conforms to the ellipse equation. The straight line formed by the connection between the one side edge 1331 and the second side edge 1332 and the reflective concave surface 1333 constitute a semi-ellipse. In addition, the first internal reflection surface 1311, the second internal reflection surface 1321, and the reflective concave surface 1333 are total reflection surfaces. In addition, the material of the light mixing lens 10 may be glass or plastic.
上述的入光側110與出光側120可沿第一軸Z排列,第一軸Z、第二軸X及第三軸Y相交於一交點且相互垂直,第二軸X與第三軸Y所構成的平面X-Y與各側凹部133相交形成各側凹部133的剖面。此外,各側凹部133的第一側緣1331與第二側緣1332之間的距離L1由出光側120朝入光側110的方向逐漸增加。 The light incident side 110 and the light exit side 120 may be arranged along the first axis Z. The first axis Z, the second axis X, and the third axis Y intersect at an intersection and are perpendicular to each other. The second axis X and the third axis Y The formed plane XY intersects each side recessed portion 133 to form a cross section of each side recessed portion 133. In addition, the distance L1 between the first side edge 1331 and the second side edge 1332 of each side recess 133 gradually increases from the light exit side 120 toward the light entrance side 110.
上述的入光側110還可包括底凹部111,底凹部111由入光側110朝出光側120延伸。底凹部111的剖面可為矩形、圓形、梯形、三角形等幾何形狀或非幾何形狀。在本實施例中,底凹部111可包括頂面1111及環側面1112,環側面1112具有相對兩端,環側面1112的其中一端與頂面1111相接,環側面1112的另一端環繞形成底開口1113,且底開口1113的孔徑R1大於頂面1111的直徑D1。底開口1113的孔徑R1可例如為9毫米(mm),頂面1111的直徑D1可例如為8mm,但不以此為限。 The light incident side 110 described above may further include a bottom concave portion 111, and the bottom concave portion 111 extends from the light incident side 110 toward the light exit side 120. The cross-section of the bottom concave portion 111 may be a geometric shape or a non-geometric shape such as a rectangle, a circle, a trapezoid, or a triangle. In this embodiment, the bottom concave portion 111 may include a top surface 1111 and a ring side surface 1112. The ring side surface 1112 has opposite ends. One end of the ring side surface 1112 is connected to the top surface 1111. The other end of the ring side surface 1112 surrounds the bottom opening. 1113, and the hole diameter R1 of the bottom opening 1113 is larger than the diameter D1 of the top surface 1111. The aperture R1 of the bottom opening 1113 may be, for example, 9 millimeters (mm), and the diameter D1 of the top surface 1111 may be, for example, 8 mm, but is not limited thereto.
上述的出光側120還可包括頂凹部121及出光面122,頂凹部121由出光側120朝入光側110延伸,且出光面122配置於頂凹部121的周圍。頂凹部121的剖面可為矩形、圓形、梯形、三角形等幾何形狀或非幾何形狀。此 外,頂凹部121還可包括底面1211及環側面1212,環側面1212具有相對兩端,環側面1212的其中一端與底面1211相接,環側面1212的另一端環繞形成頂開口1213。詳細而言,在本實施例中,頂開口1213的孔徑R2可大於底面1211的直徑D2,且出光面122配置於頂凹部121的頂開口1213的周圍。頂開口1213的孔徑R2可例如為33mm至35mm,底面1211的直徑D2可例如為31mm至33mm,且環側面1212與底面1211的夾角α可為100°,但不以此為限。 The light emitting side 120 may further include a top concave portion 121 and a light emitting surface 122. The top concave portion 121 extends from the light emitting side 120 toward the light incident side 110, and the light emitting surface 122 is disposed around the top concave portion 121. The cross-section of the top concave portion 121 may be a geometric shape or a non-geometric shape such as a rectangle, a circle, a trapezoid, or a triangle. this In addition, the top concave portion 121 may further include a bottom surface 1211 and a ring side surface 1212. The ring side surface 1212 has opposite ends. One end of the ring side surface 1212 is connected to the bottom surface 1211. The other end of the ring side surface 1212 surrounds and forms a top opening 1213. In detail, in this embodiment, the aperture R2 of the top opening 1213 may be larger than the diameter D2 of the bottom surface 1211, and the light emitting surface 122 is disposed around the top opening 1213 of the top concave portion 121. The aperture R2 of the top opening 1213 may be, for example, 33 mm to 35 mm, the diameter D2 of the bottom surface 1211 may be, for example, 31 mm to 33 mm, and the angle α between the ring side surface 1212 and the bottom surface 1211 may be 100 °, but is not limited thereto.
本實施例的混光透鏡10於使用時,光源20可放置於底凹部111內,光源20發出的光線由入光側110進入混光透鏡10中時產生折射形成朝環形側壁130前進的第一折射光,第一折射光受到環形側壁130的凹向上段131及凹向下段132的全反射作用,可形成交叉、準直及發散等光線並由出光面122射出。此外,在第一軸Z與第三軸Y所構成的平面YZ上的第一折射光到達環形側壁130時,還可受到側凹部133的全反射作用而朝平行於第二軸X的方向反射,最終由出光面122射出。由此可見,經過凹向上段131、凹向下段132及側凹部133的作用,當多晶片光源20或紅綠藍白型彩光光源20所發出的光線由入光側110進入本實施例的混光透鏡10後,可以形成如交叉、準直及發散等不同類型或/且朝不同方向前進的光線。據此,多晶片光源20或紅綠藍白型彩光光源20所發出的光線通過本實施例的混光透鏡10後可形成混合均勻且具有廣照射面積的射出光(由出光側122射出)。因此,本實施例的混光透鏡10可兼顧對於多晶片光源20或紅綠藍白型彩光光源20的混光與廣照射面積的需求。此外,藉由頂凹部121,可以減少本實施例的混光透鏡10的整體重量及原料。並且,當本實施例的混光透鏡10的原料為塑料時,成型週期亦可以減少。 When the light mixing lens 10 of this embodiment is used, the light source 20 can be placed in the bottom concave portion 111. When the light emitted from the light source 20 enters the light mixing lens 10 from the light incident side 110, it is refracted to form a first moving toward the annular side wall 130. Refracted light. The first refracted light is totally reflected by the concave upper section 131 and concave downward section 132 of the annular side wall 130, and can form cross, collimation, and divergence light and exit from the light emitting surface 122. In addition, when the first refracted light on the plane YZ formed by the first axis Z and the third axis Y reaches the annular side wall 130, it can also be reflected by the undercut 133 in a direction parallel to the second axis X. , Finally emitted from the light emitting surface 122. It can be seen that after the functions of the concave upper section 131, the concave downward section 132, and the side concave section 133, when the light emitted by the multi-chip light source 20 or the red-green-blue-white colored light source 20 enters the After the light mixing lens 10, different types of light, such as cross, collimation, and divergence, and / or light traveling in different directions can be formed. According to this, the light emitted by the multi-chip light source 20 or the red, green, blue, and white color light source 20 passes through the light mixing lens 10 of this embodiment to form the emitted light (emitted from the light emitting side 122) with a uniform and wide irradiation area. . Therefore, the light mixing lens 10 of this embodiment can take into account the requirements for the mixed light and wide irradiation area of the multi-chip light source 20 or the red, green, blue, and white color light source 20. In addition, the top concave portion 121 can reduce the overall weight and raw materials of the light mixing lens 10 in this embodiment. In addition, when the raw material of the light mixing lens 10 of this embodiment is plastic, the molding cycle can also be reduced.
圖8為本發明一實施例的混光透鏡的上視平面示意圖。請參考圖1、7及8,本實施例的混光透鏡10還可包括多個配置於出光側120的光擴散微結構140。光擴散微結構140可以印刷或雷射蝕刻出光側120的方式而形成,但不以此為限,光擴散微結構140亦可以射出成型的方式形成於出光側120上。光擴散微結構140的形狀例如可以是半球狀凸點、球冠狀凸點、長方體狀凸點、六方體狀凸點、半球狀凹點、球冠狀凹點、長方體狀凹點、六方體狀凹點等,但本發明不以此為限。詳細而言,在本實施例中,光擴散微結構140配置於出光側120的出光面122上。此外,光擴散微結構140的排列方式可為蜂巢狀,但不以此為限。光擴散微結構140可破壞光線於混光透鏡10的出光面的全反射,提高混光透鏡10內的光線由出光側120出光的比例,從而提高出光側120的亮度,同時光擴散微結構140可改變光線由混光透鏡10的出光面進入空氣的入射角及折射角,達到再次發散及擴大角度的效果。 8 is a schematic top plan view of a light mixing lens according to an embodiment of the present invention. Please refer to FIGS. 1, 7 and 8. The light mixing lens 10 in this embodiment may further include a plurality of light diffusing microstructures 140 disposed on the light emitting side 120. The light diffusion microstructure 140 may be formed by printing or laser etching the light side 120, but is not limited thereto. The light diffusion microstructure 140 may also be formed on the light exit side 120 by injection molding. The shape of the light diffusion microstructure 140 may be, for example, a hemispherical bump, a spherical crown bump, a rectangular parallelepiped bump, a hexagonal bump, a hemispherical recess, a spherical crown recess, a rectangular parallelepiped recess, or a hexagonal recess. Points, etc., but the invention is not limited to this. Specifically, in this embodiment, the light diffusion microstructure 140 is disposed on the light exit surface 122 of the light exit side 120. In addition, the arrangement manner of the light diffusion microstructures 140 may be a honeycomb shape, but is not limited thereto. The light diffusing microstructure 140 can destroy the total reflection of light on the light exit surface of the light mixing lens 10, improve the ratio of light in the light mixing lens 10 from the light exit side 120, thereby improving the brightness of the light exit side 120, and at the same time, the light diffusion microstructure 140 The angle of incidence and refraction of light entering the air from the light exit surface of the light mixing lens 10 can be changed to achieve the effects of re-divergence and expansion of the angle.
綜上所述,本發明實施例的混光透鏡,藉由凹向上段、凹向下段及側凹部,可提高多晶片光源或紅綠藍白型彩光光源所發出的光線的混光均勻性及照射面積。 In summary, the light mixing lens according to the embodiment of the present invention can improve the light mixing uniformity of light emitted by a multi-chip light source or a red, green, blue, and white color light source by concave upward, concave downward, and side concave portions. And irradiation area.
雖然本發明已以實施例揭露如上,然其並非用以限定本發明,本發明所屬技術領域中具有通常知識者,在不脫離本發明之精神和範圍內,當可作些許之更動與潤飾,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。 Although the present invention has been disclosed as above with the examples, it is not intended to limit the present invention. Those with ordinary knowledge in the technical field to which the present invention pertains may make some modifications and retouching without departing from the spirit and scope of the present invention. Therefore, the protection scope of the present invention shall be determined by the scope of the appended patent application.
Claims (10)
一入光側;
一出光側;以及
一環形側壁,連接於該入光側及該出光側之間,且具有一凹向上段及一凹向下段,該凹向上段具有一第一上緣、一第一下緣及一連接於該第一上緣及該第一下緣之間的第一內反射面,該第一下緣連接該入光側,該凹向下段具有一第二上緣、一第二下緣及一連接於該第二上緣及該第二下緣之間的第二內反射面,該第二上緣連接該出光側,該第二下緣連接該第一上緣;
其中,該第一內反射面及該第二內反射面上配置有多個側凹部,各該些側凹部由該第一下緣延伸至該第二上緣,各該些側凹部具有一第一側緣、一第二側緣及一連接於該第一側緣及該第二側緣之間的反射凹面;以及,在各該些側凹部的一剖面上,該第一側緣及該第二側緣之間形成一直線,該直線的長度為2a,該直線上的相異兩點的距離為L1,該相異兩點到該反射凹面上的一點的距離分別為L2及L3,L2與L3的和為2a,且2a大於L1。 A light mixing lens includes:
A light entrance side;
A light exit side; and an annular side wall connected between the light entrance side and the light exit side, and having a concave upper section and a concave downward section, the concave upper section having a first upper edge and a first lower edge And a first internal reflection surface connected between the first upper edge and the first lower edge, the first lower edge is connected to the light incident side, and the recess has a second upper edge, a second lower edge An edge and a second internal reflection surface connected between the second upper edge and the second lower edge, the second upper edge connected to the light exit side, and the second lower edge connected to the first upper edge;
Wherein, the first internal reflection surface and the second internal reflection surface are provided with a plurality of undercut portions, each of the undercut portions extends from the first lower edge to the second upper edge, and each of the undercut portions has a first One side edge, a second side edge, and a reflective concave surface connected between the first side edge and the second side edge; and on a cross section of each of the side concave portions, the first side edge and the A straight line is formed between the second side edges. The length of the straight line is 2a. The distance between the two different points on the straight line is L1. The distances between the two different points and a point on the reflective concave surface are L2 and L3 and L2, respectively. The sum with L3 is 2a, and 2a is greater than L1.
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