TWI499815B - Back-light module - Google Patents
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- TWI499815B TWI499815B TW102138143A TW102138143A TWI499815B TW I499815 B TWI499815 B TW I499815B TW 102138143 A TW102138143 A TW 102138143A TW 102138143 A TW102138143 A TW 102138143A TW I499815 B TWI499815 B TW I499815B
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Description
本發明是有關於一種光學模組,且特別是有關於一種背光模組。The present invention relates to an optical module, and more particularly to a backlight module.
背光模組通常包括光源以及導光板,導光板用於引導光源所產生的光線的散射方向,以將背光模組中的點光源或線光源轉換成面光源而提供給配置於背光模組上方的顯示面板或廣告看板等。The backlight module generally includes a light source and a light guide plate, and the light guide plate is configured to guide a scattering direction of the light generated by the light source, so as to convert the point light source or the line light source in the backlight module into a surface light source and provide the light source disposed above the backlight module. Display panels or billboards, etc.
目前市面上的背光模組,依據出光的光場形可大致分成高輝度準直模式背光模組以及廣視角模式背光模組。圖1A是高輝度準直模式背光模組的光場形示意圖,而圖1B是廣視角模式背光模組的光場形示意圖。請參照圖1A,高輝度準直模式背光模組具有相對集中的光場形,能夠將能量集中於一使用者,因此其發光效率比一般非集中光場形的背光模組的效率來的高。此外,由於其能量集中,旁邊的人無法接收到能量,因此有防窺的效果,而被廣泛應用於個人化產品,如手機、比電等。然而,其優點亦是 其缺點,應用高輝度準直模式背光模組的面板較無法讓不同角度方向的人同時觀看影像畫面。At present, the backlight module on the market can be roughly divided into a high-luminance collimated mode backlight module and a wide viewing angle mode backlight module according to the light field shape of the light. 1A is a schematic diagram of a light field shape of a high-luminance collimated mode backlight module, and FIG. 1B is a schematic diagram of a light field shape of a wide viewing angle mode backlight module. Referring to FIG. 1A, the high-luminance collimated mode backlight module has a relatively concentrated light field shape, and can concentrate energy on a user, so that the luminous efficiency is higher than that of a general non-concentrated light field-shaped backlight module. . In addition, due to the concentration of energy, people nearby can not receive energy, so it has anti-peep effect, and is widely used in personalized products, such as mobile phones, electricity and so on. However, the advantage is also The disadvantage is that the panel using the high-intensity collimation mode backlight module can not allow people in different angle directions to simultaneously view the image.
請參照圖1B,廣視角模式背光模組具有相對發散的光場形,能夠讓不同角度方向的人都能接收到能量,因此被廣泛應用於共享式產品,如電視機、廣告看板等。然而,其缺點是能量過於分散,導致相對高的能量耗損,為維持每一位使用者平均分到的能量,需使用高功率的光源以提供所需的輝度。此外,廣視角模式背光模組並無法達到防窺的功能。故,如何能提供一種隨使用者的需求而切換模式的雙模式(包括高輝度準直模式以及廣視角模式)背光模組,實為未來的趨勢。Referring to FIG. 1B, the wide viewing angle mode backlight module has a relatively divergent light field shape, which enables people in different angle directions to receive energy, and thus is widely used in shared products such as televisions and advertising billboards. However, the disadvantage is that the energy is too dispersive, resulting in relatively high energy consumption. To maintain the average energy of each user, a high power source is needed to provide the desired brightness. In addition, the wide viewing angle mode backlight module cannot achieve the anti-peep function. Therefore, how to provide a dual mode (including high-luminance collimation mode and wide viewing angle mode) backlight module that switches modes according to the user's needs is a future trend.
本發明提供一種背光模組,其能夠提供相對集中以及相對發散的光場形。The present invention provides a backlight module that is capable of providing a relatively concentrated and relatively divergent light field shape.
本發明的一種背光模組包括導光模組、多個第一光源以及多個第二光源。導光模組包括第一導光板、第二導光板、多個第一微結構以及多個第二微結構。第一導光板具有第一底面以及第一頂面。第一微結構位於第一底面上,並由第一底面向外突出。第二導光板具有第二底面、第二頂面以及連接第二底面與第二頂面的連接面,且第二底面位於第一頂面與第二頂面之間。第二微結構位於第二頂面上,並由第二頂面向外突出。第二導光板包括多個聚光部。各聚光部具有入光面以及出光面,出光面連接連接 面,且出光面的寬度大於入光面的寬度。第一光源位於入光面旁。第二光源位於連接面旁。A backlight module of the present invention includes a light guiding module, a plurality of first light sources, and a plurality of second light sources. The light guiding module includes a first light guiding plate, a second light guiding plate, a plurality of first microstructures and a plurality of second microstructures. The first light guide plate has a first bottom surface and a first top surface. The first microstructure is located on the first bottom surface and protrudes outward from the first bottom surface. The second light guide plate has a second bottom surface, a second top surface, and a connection surface connecting the second bottom surface and the second top surface, and the second bottom surface is located between the first top surface and the second top surface. The second microstructure is located on the second top surface and protrudes outward from the second top surface. The second light guide plate includes a plurality of light collecting portions. Each concentrating portion has a light incident surface and a light exit surface, and the light exit surface is connected and connected The width of the illuminating surface is greater than the width of the illuminating surface. The first light source is located beside the light incident surface. The second light source is located next to the connection surface.
基於上述,本發明的背光模組利用聚光部匯聚來自第一光源的光束,以提供相對集中的光場形,從而能夠達到高輝度準直模式背光模組的聚光效果。此外,透過將第二光源設置於連接面旁,使來自第二光源的光束直接入射至第二導光板內,以提供相對發散的光場形,從而能夠達到廣視角模式背光模組的廣角效果。另外,透過第一導光板以及第二導光板的設置,本發明的背光模組能夠較佳地控制由該第二頂面或該第二微結構出射的光束的角度,從而提升背光模組的發光效率。Based on the above, the backlight module of the present invention concentrates the light beam from the first light source by using the concentrating portion to provide a relatively concentrated light field shape, thereby achieving the concentrating effect of the high-luminance collimating mode backlight module. In addition, by placing the second light source beside the connection surface, the light beam from the second light source is directly incident into the second light guide plate to provide a relatively divergent light field shape, thereby achieving a wide-angle effect of the wide viewing angle mode backlight module. . In addition, the backlight module of the present invention can better control the angle of the light beam emitted by the second top surface or the second microstructure through the arrangement of the first light guide plate and the second light guide plate, thereby improving the backlight module. Luminous efficiency.
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。The above described features and advantages of the invention will be apparent from the following description.
100、200、300‧‧‧背光模組100, 200, 300‧‧‧ backlight module
110、110a‧‧‧導光模組110, 110a‧‧‧Light guide module
120‧‧‧第一光源120‧‧‧First light source
130‧‧‧第二光源130‧‧‧second light source
112‧‧‧第一導光板112‧‧‧First light guide
114‧‧‧第二導光板114‧‧‧Second light guide
116‧‧‧第三導光板116‧‧‧ Third light guide
B1‧‧‧第一底面B1‧‧‧ first bottom surface
B2‧‧‧第二底面B2‧‧‧ second bottom surface
C‧‧‧連接面C‧‧‧ connection surface
D、d‧‧‧距離D, d‧‧‧ distance
D1‧‧‧第一方向D1‧‧‧ first direction
D2‧‧‧第二方向D2‧‧‧ second direction
H‧‧‧鏤空部H‧‧‧镂空部
L‧‧‧光束L‧‧‧beam
LCP‧‧‧聚光部LCP‧‧‧The Department of Concentration
M1‧‧‧第一微結構M1‧‧‧ first microstructure
M2、M2a‧‧‧第二微結構M2, M2a‧‧‧ second microstructure
P1、P2‧‧‧截距P1, P2‧‧‧ intercept
S‧‧‧表面S‧‧‧ surface
S1‧‧‧入光面S1‧‧‧ into the glossy surface
S2‧‧‧出光面S2‧‧‧ shiny surface
T1‧‧‧第一頂面T1‧‧‧ first top
T2‧‧‧第二頂面T2‧‧‧ second top surface
W1、W2‧‧‧寬度W1, W2‧‧‧ width
θ1‧‧‧第一底角Θ1‧‧‧first bottom angle
θ2‧‧‧第二底角Θ2‧‧‧second base angle
A-A’‧‧‧線段A-A’‧‧‧ segment
圖1A是高輝度準直模式背光模組的光場形示意圖。FIG. 1A is a schematic diagram of a light field shape of a high-luminance collimated mode backlight module.
圖1B是廣視角模式背光模組的光場形示意圖。FIG. 1B is a schematic diagram of a light field shape of a wide viewing angle mode backlight module.
圖2A是依照本發明的第一實施例的一種背光模組的示意圖。2A is a schematic diagram of a backlight module in accordance with a first embodiment of the present invention.
圖2B是圖2A的側面示意圖。Figure 2B is a side elevational view of Figure 2A.
圖3A及圖3B是圖2A的局部上視示意圖。3A and 3B are partial top views of Fig. 2A.
圖4A及圖4B分別是圖3A及圖3B的光場形分布圖。4A and 4B are respectively a light field shape distribution diagram of Figs. 3A and 3B.
圖5A至圖5C是對應第二光源的連接面的多種實施型態。5A to 5C are various embodiments of the connection face corresponding to the second light source.
圖6是依照本發明的第二實施例的一種背光模組的示意圖。6 is a schematic diagram of a backlight module in accordance with a second embodiment of the present invention.
圖7是依照本發明的第三實施例的一種背光模組的示意圖。FIG. 7 is a schematic diagram of a backlight module in accordance with a third embodiment of the present invention.
圖2A是依照本發明的第一實施例的一種背光模組的示意圖。圖2B是圖2A的側面示意圖。請參照圖2A及圖2B,本實施例的背光模組100包括導光模組110、多個第一光源120以及多個第二光源130。2A is a schematic diagram of a backlight module in accordance with a first embodiment of the present invention. Figure 2B is a side elevational view of Figure 2A. Referring to FIG. 2A and FIG. 2B , the backlight module 100 of the embodiment includes a light guiding module 110 , a plurality of first light sources 120 , and a plurality of second light sources 130 .
導光模組110包括第一導光板112、第二導光板114、多個第一微結構M1以及多個第二微結構M2。第一導光板112具有第一底面B1以及相對於第一底面B1的第一頂面T1。第一微結構M1位於第一底面B1上,並由第一底面B1向外突出。在本實施例中,第一導光板112與第一微結構M1例如是,但不限於,一體成形。The light guiding module 110 includes a first light guiding plate 112, a second light guiding plate 114, a plurality of first microstructures M1, and a plurality of second microstructures M2. The first light guide plate 112 has a first bottom surface B1 and a first top surface T1 opposite to the first bottom surface B1. The first microstructure M1 is located on the first bottom surface B1 and protrudes outward from the first bottom surface B1. In the embodiment, the first light guide plate 112 and the first microstructure M1 are, for example, but not limited to, integrally formed.
本實施例的第一微結構M1例如分別沿第一方向D1延伸,且沿第二方向D2排列,其中第二方向D2例如垂直於第一方向D1。在本實施例中,各第一微結構M1例如是角柱體。亦即是,各第一微結構M1具有一90度的底角以及一小於90度的第一底角。此外,第一微結構M1尺寸相同且呈一連續的分布。舉例而言,各第一微結構M1的截距P1例如是50微米。The first microstructures M1 of the present embodiment extend, for example, respectively in the first direction D1 and in the second direction D2, wherein the second direction D2 is, for example, perpendicular to the first direction D1. In the present embodiment, each of the first microstructures M1 is, for example, a corner cylinder. That is, each of the first microstructures M1 has a base angle of 90 degrees and a first base angle of less than 90 degrees. Furthermore, the first microstructures M1 are the same size and have a continuous distribution. For example, the intercept P1 of each first microstructure M1 is, for example, 50 microns.
第二導光板114位於第一導光板112上,且第二導光板114具有第二底面B2、第二頂面T2以及連接第二底面B2與第二 頂面T2的連接面C,其中第二底面B2位於第一頂面T1與第二頂面T2之間。第二微結構M2位於第二頂面T2上,並由第二頂面T2向外突出。在本實施例中,第二導光板114與第二微結構M2例如是,但不限於,一體成形。The second light guide plate 114 is located on the first light guide plate 112, and the second light guide plate 114 has a second bottom surface B2, a second top surface T2, and a second bottom surface B2 and a second connection. The connecting surface C of the top surface T2, wherein the second bottom surface B2 is located between the first top surface T1 and the second top surface T2. The second microstructure M2 is located on the second top surface T2 and protrudes outward from the second top surface T2. In this embodiment, the second light guide plate 114 and the second microstructure M2 are, for example, but not limited to, integrally formed.
本實施例的第二微結構M2例如平行第一微結構M1設置。具體地,第二微結構M2分別沿第一方向D1延伸,且沿第二方向D2排列。在本實施例中,各第二微結構M2亦例如是角柱體。亦即是,各第二微結構M2具有一90度的底角以及一小於90度的第二底角。另外,第二微結構M2尺寸相同。舉例而言,各第二微結構M2的截距P2例如是50微米。再者,第二微結構M2於第二頂面T2的分布密度例如隨著與連接面C的距離的增加而增加。The second microstructure M2 of the present embodiment is disposed, for example, in parallel with the first microstructure M1. Specifically, the second microstructures M2 respectively extend along the first direction D1 and are arranged along the second direction D2. In this embodiment, each of the second microstructures M2 is also, for example, a corner cylinder. That is, each of the second microstructures M2 has a base angle of 90 degrees and a second base angle of less than 90 degrees. In addition, the second microstructure M2 is the same size. For example, the intercept P2 of each second microstructure M2 is, for example, 50 microns. Furthermore, the distribution density of the second microstructure M2 on the second top surface T2 increases, for example, as the distance from the connection surface C increases.
另外,第二導光板114包括多個聚光部LCP。各聚光部LCP具有入光面S1以及連接連接面C的出光面S2。在本實施例中,入光面S1的寬度W1設計成小於出光面S2的寬度W2,以提升聚光部LCP匯聚光束的效果。In addition, the second light guide plate 114 includes a plurality of light collecting portions LCP. Each of the light collecting portions LCP has a light incident surface S1 and a light exit surface S2 that connects the connection surfaces C. In the present embodiment, the width W1 of the light incident surface S1 is designed to be smaller than the width W2 of the light exit surface S2 to enhance the effect of the light collecting portion LCP collecting the light beam.
第一光源120位於入光面S1旁。第二光源130位於連接面C旁。這些第一光源120以及這些第二光源130例如為多個發光二極體或其他合適的光源。此外,第一光源120以及第二光源130例如沿第一方向D1排列。在本實施例中,第一光源120以及第二光源130例如是交替地沿第一方向D1排列。詳言之,第二光源130例如是位於聚光部LCP的兩側且朝向連接面C。然而,本發明的第一光源120以及第二光源130的排列方式並不限於上 述,所屬技術領域中具有通常知識者當可依其設計需求而改變第一光源120以及第二光源130的排列方式。The first light source 120 is located beside the light incident surface S1. The second light source 130 is located beside the connection surface C. These first light sources 120 and these second light sources 130 are, for example, a plurality of light emitting diodes or other suitable light sources. Further, the first light source 120 and the second light source 130 are arranged, for example, in the first direction D1. In the present embodiment, the first light source 120 and the second light source 130 are, for example, alternately arranged in the first direction D1. In detail, the second light source 130 is located, for example, on both sides of the concentrating portion LCP and faces the connection surface C. However, the arrangement of the first light source 120 and the second light source 130 of the present invention is not limited to the above. It is described that those skilled in the art can change the arrangement of the first light source 120 and the second light source 130 according to their design requirements.
在本實施例中,背光模組100也可進一步包括位於第一導光板112與第二導光板114之間的第三導光板116,其中第一導光板112與第二導光板114的折射率大於第三導光板116的折射率。此外,第一導光板112與第二導光板114的折射率可以相同或相異。舉例而言,第一導光板112與第二導光板114的材質例如是聚甲基丙烯酸甲酯(Polymethylmethacrylate,PMMA),其折射率例如為1.49,而第三導光板116的材質例如是鐵氟龍(Teflon),其折射率例如為1.35。In this embodiment, the backlight module 100 may further include a third light guide plate 116 between the first light guide plate 112 and the second light guide plate 114, wherein the refractive indexes of the first light guide plate 112 and the second light guide plate 114 It is larger than the refractive index of the third light guide plate 116. In addition, the refractive indices of the first light guide plate 112 and the second light guide plate 114 may be the same or different. For example, the material of the first light guide plate 112 and the second light guide plate 114 is, for example, polymethylmethacrylate (PMMA), and the refractive index thereof is, for example, 1.49, and the material of the third light guide plate 116 is, for example, iron fluoride. Teflon has a refractive index of, for example, 1.35.
當第一光源120或第二光源130發出光束L時,若光束L入射至第二頂面T2及第二底面B2的入射角超過臨界角時,光束L會以全反射的方式傳遞於第二導光板114內。然而,當光束L傳遞至第二微結構M2時,會改變光束L的反射角,從而改變光束L入射至第二底面B2的入射角。當光束L入射至第二底面B2的入射角小於臨界角時,光束L會折射進第三導光板116並傳遞至第一導光板112。傳遞至第一導光板112內的光束L會傳遞至第一微結構M1而再次改變其反射角,從而改變其入射至第一頂面T1的入射角。透過使光束L入射至第一頂面T1的入射角小於臨界角則可令光束L再次通過第三導光板116並傳遞至第二導光板114,且自第二導光板114出射。在本實施例中,可進一步令第一微結構M1未與第一底面B1連接的表面為反射面,例如於第一微 結構M1未與第一底面B1連接的表面S形成高反射物質,以將光束L較佳地向上傳遞。When the first light source 120 or the second light source 130 emits the light beam L, if the incident angle of the light beam L incident on the second top surface T2 and the second bottom surface B2 exceeds a critical angle, the light beam L is transmitted to the second in a total reflection manner. Inside the light guide plate 114. However, when the light beam L is transmitted to the second microstructure M2, the reflection angle of the light beam L is changed, thereby changing the incident angle at which the light beam L is incident to the second bottom surface B2. When the incident angle of the light beam L incident on the second bottom surface B2 is smaller than the critical angle, the light beam L is refracted into the third light guide plate 116 and transmitted to the first light guide plate 112. The light beam L transmitted into the first light guide plate 112 is transmitted to the first microstructure M1 to change its reflection angle again, thereby changing the incident angle thereof incident on the first top surface T1. By making the incident angle of the light beam L incident on the first top surface T1 smaller than the critical angle, the light beam L can pass through the third light guide plate 116 again and be transmitted to the second light guide plate 114, and can be emitted from the second light guide plate 114. In this embodiment, the surface of the first microstructure M1 not connected to the first bottom surface B1 may be a reflective surface, for example, the first micro The surface S of the structure M1 not connected to the first bottom surface B1 forms a highly reflective substance to preferably transmit the light beam L upward.
透過對第一微結構M1以及第二微結構M2進行角度設計,以及透過改變第一微結構M1於第一頂面T1的配置位置,則可控制光束L的行進方向,從而能夠較佳地控制由第二頂面T2或第二微結構M2出射的光束L的角度,例如是令光束L小角度出射。舉例而言,本實施例的各第一微結構M1的,第一底角θ1例如是落在50度至70度的範圍內,而各第二微結構M2的第二頂角θ2例如是落在1度至10度的範圍內。此外,各第一微結構M1的90度的底角比第一底角θ1更鄰近連接面C,而各第二微結構M2的90度的底角比第二頂角θ2更鄰近連接面C。Through the angular design of the first microstructure M1 and the second microstructure M2, and by changing the arrangement position of the first microstructure M1 on the first top surface T1, the traveling direction of the light beam L can be controlled, thereby enabling better control. The angle of the light beam L emitted by the second top surface T2 or the second microstructure M2 is, for example, such that the light beam L is emitted at a small angle. For example, in the first microstructures M1 of the embodiment, the first base angle θ1 falls within a range of 50 degrees to 70 degrees, for example, and the second apex angle θ2 of each second microstructure M2 is, for example, a drop. In the range of 1 degree to 10 degrees. In addition, a 90 degree bottom angle of each of the first microstructures M1 is closer to the connection surface C than the first base angle θ1, and a 90 degree bottom angle of each of the second microstructures M2 is closer to the connection surface C than the second apex angle θ2 .
在現有的技術中,背光模組通常僅設置有一個導光板,且導光板的底部設置有微結構以透過散射的方式破壞全反射現象,從而使光束自出光面出射。然而,這種架構除了難以控制光束自導光板出射的角度之外,大部分的光束會以大角度自導光板出射,而降低背光模組整體的發光效率。相較之下,本實施例利用兩層以上的導光板的設置,且透過導光板的折射率以及頂角的設計,可有效地控制由第二頂面T2或第二微結構M2出射的光束L的角度,從而提升背光模組100的發光效率。In the prior art, the backlight module is usually only provided with a light guide plate, and the bottom of the light guide plate is provided with a microstructure to destroy the total reflection phenomenon by means of scattering, so that the light beam is emitted from the light exit surface. However, in addition to the difficulty in controlling the angle at which the light beam is emitted from the light guide plate, most of the light beams are emitted from the light guide plate at a large angle, thereby reducing the overall luminous efficiency of the backlight module. In contrast, the present embodiment utilizes the arrangement of two or more light guide plates, and the light beam emitted from the second top surface T2 or the second microstructure M2 can be effectively controlled by the design of the refractive index and the apex angle of the light guide plate. The angle of L increases the luminous efficiency of the backlight module 100.
此外,透過適度地調變第一導光板112、第二導光板114以及第三導光板116的厚度,應用本實施例的背光模組100的電子產片亦可符合市場對於電子產片輕薄的訴求。詳言之,第一導 光板112、第二導光板114以及第三導光板116的厚度越薄,背光模組100的整體厚度則可越薄,惟第二導光板114鄰近第一光源120與第二光源130的一側需符合第一光源120與第二光源130的厚度,以涵蓋自第一光源120與第二光源130的光束L。舉例而言,第一導光板112的厚度例如落在0.1毫米(mm)至3mm的範圍內,第二導光板114的厚度例如落在1mm至3mm的範圍內,而第三導光板116的厚度例如落在0.1mm至3mm的範圍內。In addition, by appropriately modulating the thicknesses of the first light guide plate 112, the second light guide plate 114, and the third light guide plate 116, the electronic production of the backlight module 100 of the present embodiment can also meet the market's light and thin electronic production. Appeal. In detail, the first guide The thinner the thickness of the light panel 112, the second light guide plate 114, and the third light guide plate 116, the thinner the overall thickness of the backlight module 100, but the second light guide plate 114 is adjacent to one side of the first light source 120 and the second light source 130. The thickness of the first light source 120 and the second light source 130 is required to cover the light beam L from the first light source 120 and the second light source 130. For example, the thickness of the first light guide plate 112 falls within a range of, for example, 0.1 mm (mm) to 3 mm, and the thickness of the second light guide plate 114 falls within a range of, for example, 1 mm to 3 mm, and the thickness of the third light guide plate 116. For example, it falls within the range of 0.1 mm to 3 mm.
圖3A及圖3B是圖2A的局部上視示意圖。圖4A及圖4B分別是圖3A及圖3B的光場形分布圖,其中線段A-A’的方向平行於圖3A中的第一方向D1。請先參照圖3A及圖4A,背光模組100的第一光源120與第二光源130例如非同時開啟。進一步而言,當背光模組100僅開啟第一光源120時,如圖3A所示,聚光部LCP可匯聚來自第一光源120的光束L,以提供相對集中的光場形,從而能夠達到高輝度準直模式背光模組的聚光效果(如圖4A所示)。3A and 3B are partial top views of Fig. 2A. 4A and 4B are respectively a light field shape distribution diagram of Figs. 3A and 3B, in which the direction of the line segment A-A' is parallel to the first direction D1 in Fig. 3A. Referring to FIG. 3A and FIG. 4A , the first light source 120 and the second light source 130 of the backlight module 100 are not simultaneously turned on, for example. Further, when the backlight module 100 only turns on the first light source 120, as shown in FIG. 3A, the concentrating portion LCP can converge the light beam L from the first light source 120 to provide a relatively concentrated light field shape, thereby achieving The concentrating effect of the high-intensity collimated mode backlight module (as shown in Figure 4A).
在本實施例中,聚光部LCP聚光部LCP的聚光效果可自調整各出光面S2在第一方向D1上的寬度W2與各入光面S1在第一方向D1上的寬度W1的比值來體現。舉例而言,寬度W2與寬度W1的比值例如落在1.1至6的範圍內。再者,本實施例亦可透過調變出光面S2至入光面S1在第二方向D2上的距離D與出光面S2在第一方向D1上的寬度W2的比值,來提升第一光源120的混光效果。舉例而言,距離D與寬度W2的比值例如落在0.1 至10的範圍內。In this embodiment, the condensing effect of the concentrating portion LCP concentrating portion LCP can automatically adjust the width W2 of each illuminating surface S2 in the first direction D1 and the width W1 of each illuminating surface S1 in the first direction D1. The ratio is reflected. For example, the ratio of the width W2 to the width W1 falls, for example, in the range of 1.1 to 6. Furthermore, in this embodiment, the first light source 120 can also be raised by adjusting the ratio of the distance D between the light exit surface S2 and the light incident surface S1 in the second direction D2 and the width W2 of the light exit surface S2 in the first direction D1. The light mixing effect. For example, the ratio of the distance D to the width W2 falls, for example, at 0.1. To the range of 10.
另一方面,如圖3B及圖4B所示,當背光模組100僅開啟第二光源130時,由於第二光源130設置於連接面C旁,使來自第二光源130的光束L直接入射至第二導光板114內,以提供相對發散的光場形,從而能夠達到廣視角模式背光模組的廣角效果(如圖4B所示)。在本實施例中,第二導光板114例如可進一步包括多個由連接面C向內凹陷的鏤空部H,以使光場形進一步發散。各鏤空部H的延伸方向例如垂直於第二光源120的排列方向(即第一方向D1)且垂直於第二微結構M2的排列方向(即第二方向D2)。此外,各第二光源130例如對應至少一鏤空部H設置。On the other hand, as shown in FIG. 3B and FIG. 4B, when the backlight module 100 only turns on the second light source 130, since the second light source 130 is disposed beside the connection surface C, the light beam L from the second light source 130 is directly incident to The second light guide plate 114 is provided to provide a relatively divergent light field shape, thereby achieving a wide-angle effect of the wide viewing angle mode backlight module (as shown in FIG. 4B). In this embodiment, the second light guide plate 114 may further include a plurality of hollow portions H recessed inwardly from the connecting surface C to further diverge the light field shape. The extending direction of each hollow portion H is, for example, perpendicular to the arrangement direction of the second light source 120 (ie, the first direction D1) and perpendicular to the arrangement direction of the second microstructures M2 (ie, the second direction D2). Furthermore, each of the second light sources 130 is provided, for example, corresponding to at least one hollow portion H.
本實施例雖以各第二光源130對應一三角柱狀的鏤空部H設置進行說明,但本發明不限於此。圖5A至圖5C是對應第二光源的連接面的多種實施型態。如圖5A所示,各第二光源130也可以對應多個鏤空部設置,且對應各第二光源130的這些鏤空部H例如呈一連續的分布。或者,如圖5B所示,這些鏤空部H也可以不是呈連續的分布,且對應各第二光源130的相鄰兩鏤空部H維持一距離d。再者,如圖5C所示,這些鏤空部H的形狀也可以為半圓柱狀,其中所述半圓柱並不限定為圓柱的一半。In the present embodiment, the second light source 130 is provided corresponding to a triangular column-shaped hollow portion H, but the present invention is not limited thereto. 5A to 5C are various embodiments of the connection face corresponding to the second light source. As shown in FIG. 5A, each of the second light sources 130 may be disposed corresponding to the plurality of hollow portions, and the hollow portions H corresponding to the second light sources 130 are, for example, in a continuous distribution. Alternatively, as shown in FIG. 5B, the hollow portions H may not be in a continuous distribution, and maintain a distance d corresponding to the adjacent two hollow portions H of the respective second light sources 130. Further, as shown in FIG. 5C, the shape of the hollow portions H may also be semi-cylindrical, wherein the semi-cylindrical shape is not limited to half of the cylinder.
由上述可知,本實施例的背光模組100可具有兩種光源模式,包括高輝度準直模式以及廣視角模式,並且,這兩種光源模式可視使用者的需求而做切換。具體地,當使用者獨自一人使 用應用背光模組100的電子產品時,其可將背光模組100切換為高輝度準直模式,以具備防窺的效果。由於在高輝度準直模式下,光束L具備較佳的匯聚效果,亦即是能量相對集中、能量耗損相對低,因此欲達到所需的輝度,第一光源120可以使用功率相對低的光源,如此,可符合全球對於節約能源的訴求。另一方面,當多人觀賞應用背光模組100的電子產品時,則可將背光模組100切換至廣視角模式,使不同視角的使用者皆能夠觀賞到影像畫面。As can be seen from the above, the backlight module 100 of the present embodiment can have two light source modes, including a high-luminance collimation mode and a wide viewing angle mode, and the two light source modes can be switched according to the needs of the user. Specifically, when the user makes it alone When the electronic product of the backlight module 100 is applied, the backlight module 100 can be switched to a high-luminance collimation mode to have an anti-peep effect. Since the light beam L has a better convergence effect in the high-luminance collimation mode, that is, the energy is relatively concentrated and the energy consumption is relatively low, the first light source 120 can use a relatively low-power light source in order to achieve the desired luminance. In this way, it can meet the global demand for energy conservation. On the other hand, when a plurality of people view the electronic products of the backlight module 100, the backlight module 100 can be switched to the wide viewing angle mode, so that users of different viewing angles can view the image.
另外,本實施例的背光模組100可進一步包括擴散片(未繪示),設置於導光模組110上,以降低第二微結構M2的可視性。In addition, the backlight module 100 of the present embodiment may further include a diffusion sheet (not shown) disposed on the light guiding module 110 to reduce the visibility of the second microstructure M2.
圖6是依照本發明的第二實施例的一種背光模組的示意圖。請參照圖6,本實施例的背光模組200大致相同於上述背光模組100,且相同的元件以相同的標號表示,於此便不再贅述。主要的差異在於,本實施例的導光模組110a的第二微結構M2a在第一方向D1上並非連續的結構。透過這種結構設計,可降低第二微結構M2a的可視性,從而可免去前述擴散片的設置。6 is a schematic diagram of a backlight module in accordance with a second embodiment of the present invention. Referring to FIG. 6, the backlight module 200 of the present embodiment is substantially the same as the backlight module 100, and the same components are denoted by the same reference numerals and will not be described again. The main difference is that the second microstructure M2a of the light guiding module 110a of the present embodiment is not a continuous structure in the first direction D1. Through this structural design, the visibility of the second microstructure M2a can be reduced, thereby eliminating the arrangement of the aforementioned diffusion sheet.
圖7是依照本發明的第三實施例的一種背光模組的示意圖。請參照圖7,本實施例的背光模組300大致相同於上述背光模組100、200,且相同的元件以相同的標號表示,於此便不再贅述。主要的差異在於,本實施例的背光模組300省略上述第三導光板116的設置,且第二底面B2與第一頂面T1接觸。在雙層導光板的架構下,本實施例的背光模組300可具有相對薄的厚度。FIG. 7 is a schematic diagram of a backlight module in accordance with a third embodiment of the present invention. Referring to FIG. 7, the backlight module 300 of the present embodiment is substantially the same as the backlight module 100, 200, and the same components are denoted by the same reference numerals and will not be described again. The main difference is that the backlight module 300 of the embodiment omits the arrangement of the third light guide plate 116, and the second bottom surface B2 is in contact with the first top surface T1. Under the structure of the double-layer light guide plate, the backlight module 300 of the embodiment may have a relatively thin thickness.
在本實施例中,亦可在第一導光板112的折射率小於第 二導光板114的折射率的架構下,透過對第一微結構M1以及第二微結構M2進行角度設計,以及透過改變第一微結構M1於第一頂面T1的配置位置,以控制光束L的行進方向,從而能夠較佳地控制由第二頂面T2或第二微結構M2出射的光束L的角度,例如是令光束L小角度出射。舉例而言,本實施例的各第一微結構M1的第一底角θ1例如是落在30度至50度的範圍內,而各第二微結構M2的第二底角θ2例如是落在1度至10度的範圍內。In this embodiment, the refractive index of the first light guide plate 112 may be smaller than the first Under the framework of the refractive index of the two light guide plates 114, the angle is designed by the first microstructure M1 and the second microstructure M2, and the position of the first microstructure M1 is changed by the first top surface T1 to control the light beam L. The direction of travel, so that the angle of the light beam L emitted by the second top surface T2 or the second microstructure M2 can be preferably controlled, for example, to cause the light beam L to exit at a small angle. For example, the first base angle θ1 of each of the first microstructures M1 of the present embodiment falls within a range of 30 degrees to 50 degrees, for example, and the second base angle θ2 of each second microstructure M2 falls, for example. In the range of 1 degree to 10 degrees.
再者,本實施例亦可透過採用圖6中第二微結構M2的結構設計,以降低第二微結構M2a的可視性,從而可免去前述擴散片的設置。Furthermore, the embodiment can also reduce the visibility of the second microstructure M2a by adopting the structural design of the second microstructure M2 in FIG. 6, thereby eliminating the arrangement of the diffusion sheet.
綜上所述,本發明的背光模組利用聚光部匯聚來自第一光源的光束,以提供相對集中的光場形,從而能夠達到高輝度準直模式背光模組的聚光效果。此外,透過將第二光源設置於連接面旁,使來自第二光源的光束直接入射至第二導光板內,以提供相對發散的光場形,從而能夠達到廣視角模式背光模組的廣角效果。另外,透過第一導光板以及第二導光板的設置,本發明的背光模組能夠較佳地控制由該第二頂面或該第二微結構出射的光束的角度,從而提升背光模組的發光效率。In summary, the backlight module of the present invention utilizes the concentrating portion to converge the light beam from the first light source to provide a relatively concentrated light field shape, thereby achieving the concentrating effect of the high-luminance collimated mode backlight module. In addition, by placing the second light source beside the connection surface, the light beam from the second light source is directly incident into the second light guide plate to provide a relatively divergent light field shape, thereby achieving a wide-angle effect of the wide viewing angle mode backlight module. . In addition, the backlight module of the present invention can better control the angle of the light beam emitted by the second top surface or the second microstructure through the arrangement of the first light guide plate and the second light guide plate, thereby improving the backlight module. Luminous efficiency.
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,任何所屬技術領域中具有通常知識者,在不脫離本發明的精神和範圍內,當可作些許的更動與潤飾,故本發明的保護範圍當視後附的申請專利範圍所界定者為準。Although the present invention has been disclosed in the above embodiments, it is not intended to limit the present invention, and any one of ordinary skill in the art can make some changes and refinements without departing from the spirit and scope of the present invention. The scope of the invention is defined by the scope of the appended claims.
100‧‧‧背光模組100‧‧‧Backlight module
110‧‧‧導光模組110‧‧‧Light guide module
120‧‧‧第一光源120‧‧‧First light source
130‧‧‧第二光源130‧‧‧second light source
112‧‧‧第一導光板112‧‧‧First light guide
114‧‧‧第二導光板114‧‧‧Second light guide
116‧‧‧第三導光板116‧‧‧ Third light guide
B1‧‧‧第一底面B1‧‧‧ first bottom surface
B2‧‧‧第二底面B2‧‧‧ second bottom surface
C‧‧‧連接面C‧‧‧ connection surface
D‧‧‧距離D‧‧‧Distance
D1‧‧‧第一方向D1‧‧‧ first direction
D2‧‧‧第二方向D2‧‧‧ second direction
H‧‧‧鏤空部H‧‧‧镂空部
LCP‧‧‧聚光部LCP‧‧‧The Department of Concentration
M1‧‧‧第一微結構M1‧‧‧ first microstructure
M2‧‧‧第二微結構M2‧‧‧Second microstructure
P1、P2‧‧‧截距P1, P2‧‧‧ intercept
T1‧‧‧第一頂面T1‧‧‧ first top
T2‧‧‧第二頂面T2‧‧‧ second top surface
W1、W2‧‧‧寬度W1, W2‧‧‧ width
Claims (20)
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TW102138143A TWI499815B (en) | 2013-10-22 | 2013-10-22 | Back-light module |
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TW102138143A TWI499815B (en) | 2013-10-22 | 2013-10-22 | Back-light module |
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TW201516492A TW201516492A (en) | 2015-05-01 |
TWI499815B true TWI499815B (en) | 2015-09-11 |
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TWI563325B (en) | 2015-12-04 | 2016-12-21 | Young Lighting Technology Inc | Light source module and display apparatus |
TWI563326B (en) | 2015-12-04 | 2016-12-21 | Young Lighting Technology Inc | Light source module and display apparatus |
CN113359348B (en) * | 2021-06-02 | 2023-06-27 | 深圳市华星光电半导体显示技术有限公司 | Backlight module and display device |
CN113359349A (en) * | 2021-06-02 | 2021-09-07 | 深圳市华星光电半导体显示技术有限公司 | Backlight module and display device |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
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TW200504424A (en) * | 2003-07-18 | 2005-02-01 | Hon Hai Prec Ind Co Ltd | Back light module and liquid crystal display using the same |
TW200801615A (en) * | 2006-04-20 | 2008-01-01 | Fujikura Ltd | Display device and manufacturing method thereof, method for displaying pattern, and blind device and blind method |
TW201310092A (en) * | 2011-08-25 | 2013-03-01 | Radiant Opto Electronics Corp | Light guide plate and light source module |
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2013
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Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
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TW200504424A (en) * | 2003-07-18 | 2005-02-01 | Hon Hai Prec Ind Co Ltd | Back light module and liquid crystal display using the same |
TW200801615A (en) * | 2006-04-20 | 2008-01-01 | Fujikura Ltd | Display device and manufacturing method thereof, method for displaying pattern, and blind device and blind method |
TW201310092A (en) * | 2011-08-25 | 2013-03-01 | Radiant Opto Electronics Corp | Light guide plate and light source module |
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