TWI627475B - Backlight module - Google Patents
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- TWI627475B TWI627475B TW106119741A TW106119741A TWI627475B TW I627475 B TWI627475 B TW I627475B TW 106119741 A TW106119741 A TW 106119741A TW 106119741 A TW106119741 A TW 106119741A TW I627475 B TWI627475 B TW I627475B
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- 230000003287 optical effect Effects 0.000 claims abstract description 27
- 239000000463 material Substances 0.000 claims abstract description 24
- 238000000149 argon plasma sintering Methods 0.000 claims description 9
- 239000011248 coating agent Substances 0.000 claims description 4
- 238000000576 coating method Methods 0.000 claims description 4
- 230000000694 effects Effects 0.000 description 6
- 238000004381 surface treatment Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 238000005530 etching Methods 0.000 description 3
- 238000007731 hot pressing Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 2
- 238000009792 diffusion process Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
- F21S8/00—Lighting devices intended for fixed installation
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
- F21V5/00—Refractors for light sources
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
- F21V2200/00—Use of light guides, e.g. fibre optic devices, in lighting devices or systems
- F21V2200/20—Use of light guides, e.g. fibre optic devices, in lighting devices or systems of light guides of a generally planar shape
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Planar Illumination Modules (AREA)
Abstract
一種背光模組包含一導光板、複數柱狀微結構以及一光學材料。導光板具有至少一入光面及一出光面,出光面具有鄰近入光面的一第一區域、及遠離入光面並鄰接第一區域的一第二區域。複數柱狀微結構至少設置於出光面的第一區域及第二區域,各個柱狀微結構具有一微結構表面,且每兩相鄰微結構表面間形成一間隙。光學材料充填於第一區域的間隙。 A backlight module includes a light guide plate, a plurality of columnar microstructures, and an optical material. The light guide plate has at least one light incident surface and a light emitting surface. The light emitting surface has a first region adjacent to the light incident surface and a second region far from the light incident surface and adjacent to the first region. The plurality of columnar microstructures are disposed at least in the first region and the second region of the light emitting surface. Each columnar microstructure has a microstructure surface, and a gap is formed between every two adjacent microstructure surfaces. The optical material fills the gap in the first region.
Description
本發明關於一種背光模組。 The invention relates to a backlight module.
於目前的背光模組設計中,導光板表面通常會形成微結構以提高導光板輝度,進而增加背光模組的整體亮度。舉例而言,如圖1所示,導光板102上形成的柱狀微結構104,可藉由折射原理縮小出光角度並提高光源106的利用效率,使導光板102的輝度增加。然而,柱狀微結構104的折射聚光效果,容易使導光板102的入光側的亮暗帶分佈現象更為明顯,導致導光板102的出光均勻性下降。 In the current backlight module design, microstructures are usually formed on the surface of the light guide plate to improve the brightness of the light guide plate, thereby increasing the overall brightness of the backlight module. For example, as shown in FIG. 1, the columnar microstructures 104 formed on the light guide plate 102 can reduce the light angle and improve the utilization efficiency of the light source 106 by the principle of refraction, so that the brightness of the light guide plate 102 is increased. However, the refracting and condensing effect of the columnar microstructures 104 tends to make the distribution of bright and dark bands on the light incident side of the light guide plate 102 more obvious, resulting in a decrease in the uniformity of the light output of the light guide plate 102.
“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, so the content disclosed in the "prior art" paragraph may include some conventional technologies that do not constitute the ordinary knowledge of those skilled in the art. The content disclosed in the "prior art" paragraph does not represent the content or the problem to be solved by one or more embodiments of the present invention, and has been known or recognized by those with ordinary knowledge in the technical field before the application of the present invention.
本發明提供一種可減輕入光側亮暗帶分佈現象並提高出光均勻性的背光模組設計。 The invention provides a backlight module design that can reduce the distribution of bright and dark bands on the light-incident side and improve the uniformity of light output.
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.
為達到上述之一或部份或全部目的或是其他目的,本發明一實施例的一種背光模組包含一導光板、複數柱狀微結構以及一 光學材料。導光板具有至少一入光面及一出光面,出光面具有鄰近入光面的一第一區域、及遠離入光面並鄰接第一區域的一第二區域。複數柱狀微結構至少設置於出光面的第一區域及第二區域,各個柱狀微結構具有一微結構表面,且每兩相鄰微結構表面間形成一間隙。光學材料充填於第一區域的間隙。 In order to achieve one or some or all of the above or other purposes, a backlight module according to an embodiment of the present invention includes a light guide plate, a plurality of columnar microstructures, and a Optical materials. The light guide plate has at least one light incident surface and a light emitting surface. The light emitting surface has a first region adjacent to the light incident surface and a second region far from the light incident surface and adjacent to the first region. The plurality of columnar microstructures are disposed at least in the first region and the second region of the light emitting surface. Each columnar microstructure has a microstructure surface, and a gap is formed between every two adjacent microstructure surfaces. The optical material fills the gap in the first region.
於一實施例中,光學材料於間隙的充填高度與相鄰的微結構表面的頂點平齊,且光學材料例如可為印刷油墨或光學鍍膜。 In one embodiment, the filling height of the optical material in the gap is flush with the apex of the adjacent microstructure surface, and the optical material may be, for example, a printing ink or an optical coating.
於一實施例中,各個柱狀微結構的一長軸方向可實質垂直入光面,且各個柱狀微結構可彼此實質平行。 In an embodiment, a major axis direction of each of the columnar microstructures may be substantially perpendicular to the light incident surface, and each of the columnar microstructures may be substantially parallel to each other.
本發明另一實施例提供一種背光模組,包含一導光板、複數柱狀微結構以及一光學材料。導光板具有至少一入光面及一出光面,出光面具有鄰近入光面的一第一區域、及遠離入光面並鄰接第一區域的一第二區域。複數具有同一形狀的柱狀微結構,至少設置於出光面的第一區域及第二區域。光學材料塗佈於設有柱狀微結構的第一區域。 Another embodiment of the present invention provides a backlight module including a light guide plate, a plurality of columnar microstructures, and an optical material. The light guide plate has at least one light incident surface and a light emitting surface. The light emitting surface has a first region adjacent to the light incident surface and a second region far from the light incident surface and adjacent to the first region. The plurality of columnar microstructures having the same shape are disposed at least in the first region and the second region of the light emitting surface. The optical material is coated on a first region provided with a columnar microstructure.
本發明另一實施例提供一種背光模組,包含一導光板、複數第一柱狀微結構以及複數第二柱狀微結構。導光板具有至少一入光面及一出光面,出光面具有鄰近入光面的一第一區域、及遠離入光面並鄰接第一區域的一第二區域。複數第一柱狀微結構設置於出光面的第一區域,複數第二柱狀微結構設置於出光面的第二區域。各個第一柱狀微結構與各個第二柱狀微結構的形狀不同,且各個第一柱狀微結構的光散射能力大於各個第二柱狀微結構的光散射能力。 Another embodiment of the present invention provides a backlight module including a light guide plate, a plurality of first columnar microstructures, and a plurality of second columnar microstructures. The light guide plate has at least one light incident surface and a light emitting surface. The light emitting surface has a first region adjacent to the light incident surface and a second region far from the light incident surface and adjacent to the first region. The plurality of first columnar microstructures are disposed in a first region of the light emitting surface, and the plurality of second columnar microstructures are disposed in a second region of the light emitting surface. Each first columnar microstructure has a different shape from each second columnar microstructure, and the light scattering ability of each first columnar microstructure is greater than the light scattering ability of each second columnar microstructure.
於一實施例中,第一柱狀微結構上形成有熱壓、雷射、或蝕刻表面。 In one embodiment, the first columnar microstructure is formed with a hot-pressed, laser, or etched surface.
藉由上述各個實施例的設計,因對鄰近入光側的柱狀 微結構進行表面處理,例如以表面加工方式改變微結構形狀或以光學材料填充微結構表面,即能局部地調整出光面的不同區域的光散射效果,達到以較簡易的方式減輕鄰近入光面的亮暗帶分佈及提高出光均勻性的目的。 With the design of each of the above embodiments, the columnar shape Surface treatment of the microstructure, such as changing the shape of the microstructure by surface processing or filling the microstructure surface with optical materials, can locally adjust the light scattering effect of different areas of the light surface to achieve a simpler way to reduce the adjacent light incident surface The distribution of bright and dark bands and the purpose of improving light uniformity.
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。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。 Other objects and advantages of the present invention can be further understood from the technical features disclosed by the present invention. In order to make the above and other objects, features, and advantages of the present invention more comprehensible, embodiments are described in detail below with reference to the accompanying drawings, as follows.
10‧‧‧背光模組 10‧‧‧ backlight module
12‧‧‧導光板 12‧‧‧light guide
12a‧‧‧入光面 12a‧‧‧Glass entrance
12b‧‧‧出光面 12b‧‧‧light surface
14‧‧‧柱狀微結構 14‧‧‧ Columnar Microstructure
14a‧‧‧微結構表面 14a‧‧‧microstructured surface
16‧‧‧光學材料 16‧‧‧ Optical Materials
18‧‧‧光源 18‧‧‧ light source
102‧‧‧導光板 102‧‧‧light guide
104‧‧‧柱狀微結構 104‧‧‧Columnar microstructure
106‧‧‧光源 106‧‧‧light source
L‧‧‧長軸方向 L‧‧‧ Long axis direction
P‧‧‧第一區域 P‧‧‧First Zone
Q‧‧‧第二區域 Q‧‧‧Second Zone
S‧‧‧間隙 S‧‧‧ Clearance
V‧‧‧頂點 V‧‧‧ Vertex
圖1為一習知背光模組的示意圖。 FIG. 1 is a schematic diagram of a conventional backlight module.
圖2為本發明一實施例的背光模組的剖面示意簡圖。 FIG. 2 is a schematic cross-sectional view of a backlight module according to an embodiment of the present invention.
圖3為本發明一實施例的導光板及形成於導光板上的柱狀微結構的立體示意圖。 3 is a schematic perspective view of a light guide plate and a columnar microstructure formed on the light guide plate according to an embodiment of the present invention.
圖4A及圖4B為依本發明一實施例,顯示導光板出光面的不同區域的不同微結構表面形態的示意圖。 FIG. 4A and FIG. 4B are schematic diagrams showing different microstructure surface morphologies of different regions of the light exit surface of the light guide plate according to an embodiment of the present invention.
圖5A及圖5B為依本發明另一實施例,顯示導光板出光面的不同區域的不同微結構表面形態的示意圖。 5A and FIG. 5B are schematic diagrams showing different microstructure surface morphologies of different regions of the light exit surface of the light guide plate according to another embodiment of the present invention.
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 of the embodiments with reference to the drawings. The directional terms mentioned in the following embodiments, such as: up, down, left, right, front, or rear, 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2為本發明一實施例的背光模組的剖面示意簡圖。圖3為本發明一實施例的導光板及形成於導光板上的柱狀微結構的 立體示意圖。如圖2及圖3所示,一種背光模組10包含一導光板12、複數柱狀微結構14、及一光學材料16。導光板12具有至少一入光面12a及一出光面12b,且入光面12a鄰近一光源18。出光面12b具有鄰近入光面12a的一第一區域P、及遠離入光面12a並鄰接第一區域P的一第二區域Q。請同時參考圖2及圖3,於本實施例中,複數柱狀微結構14至少設置於出光面12b的第一區域P及第二區域Q,各個柱狀微結構14具有一微結構表面(光折射面)14a且可沿其長軸方向L延伸至導光板12的兩側,且每兩相鄰微結構表面14a間形成一間隙S。於本實施例中,位於出光面12b上的各個複數柱狀微結構14可具有實質相同的外形,光學材料16可僅充填於鄰近入光面12a的第一區域P的間隙S,因此,比較圖4A及圖4B可知,和間隙S內未充填光學材料16的第二區域Q(圖4A)相比,間隙S內充填光學材料16的第一區域P(圖4B)可增加光線反射次數並提高光散射效果,使混光更加均勻而減輕鄰近入光面12a的亮暗帶分佈現象,提高導光板12的出光均勻性。 FIG. 2 is a schematic cross-sectional view of a backlight module according to an embodiment of the present invention. FIG. 3 is a light guide plate and a columnar microstructure formed on the light guide plate according to an embodiment of the present invention; Stereo schematic. As shown in FIGS. 2 and 3, a backlight module 10 includes a light guide plate 12, a plurality of columnar microstructures 14, and an optical material 16. The light guide plate 12 has at least one light incident surface 12 a and a light exit surface 12 b, and the light incident surface 12 a is adjacent to a light source 18. The light emitting surface 12b has a first region P adjacent to the light incident surface 12a, and a second region Q far from the light incident surface 12a and adjacent to the first region P. Please refer to FIG. 2 and FIG. 3 at the same time. In this embodiment, the plurality of columnar microstructures 14 are disposed at least in the first region P and the second region Q of the light emitting surface 12b. Each columnar microstructure 14 has a microstructure surface ( The light-refracting surface) 14a can extend to both sides of the light guide plate 12 along the long axis direction L, and a gap S is formed between every two adjacent microstructure surfaces 14a. In this embodiment, each of the plurality of columnar microstructures 14 on the light emitting surface 12b may have substantially the same shape, and the optical material 16 may only fill the gap S of the first region P adjacent to the light incident surface 12a. Therefore, comparison 4A and 4B, compared with the second region Q (FIG. 4A) in which the optical material 16 is not filled in the gap S, the first region P (FIG. 4B) in which the optical material 16 is filled in the gap S can increase the number of light reflections and Improve the light scattering effect, make the light mixing more uniform, reduce the distribution of bright and dark bands adjacent to the light incident surface 12a, and improve the light uniformity of the light guide plate 12.
需注意上述光學材料16充填柱狀微結構間隙S的使用材質及充填方式完全不限定。於一實施例中,光學材料16可利用印刷油墨或光學鍍膜等方式塗佈於設有柱狀微結構14的第一區域P上,但本發明不限於此。再者,於一實施例中,光學材料16於間隙S的充填高度可如圖4B所示,與相鄰的微結構表面14a的頂點V平齊,但本發明不限於此。於一實施例中,各個柱狀微結構14的長軸方向L可實質垂直入光面12a,且各個柱狀微結構14例如可彼此實質平行。再者,雖然圖3例示的柱狀微結構14具有弧面的截面外形,但其並不限定,柱狀微結構14亦可具有三角形或其它形狀的截面外形。 It should be noted that the material and the filling method for filling the columnar microstructure gap S with the optical material 16 are not limited at all. In one embodiment, the optical material 16 can be coated on the first region P provided with the columnar microstructures 14 by using printing ink or optical coating, but the present invention is not limited thereto. Furthermore, in an embodiment, the filling height of the optical material 16 in the gap S may be flush with the vertex V of the adjacent microstructure surface 14a as shown in FIG. 4B, but the present invention is not limited thereto. In one embodiment, the major axis direction L of each of the columnar microstructures 14 may be substantially perpendicular to the light incident surface 12 a, and each of the columnar microstructures 14 may be substantially parallel to each other, for example. Furthermore, although the columnar microstructure 14 illustrated in FIG. 3 has a cross-sectional profile of a curved surface, it is not limited, and the columnar microstructure 14 may also have a triangular or other cross-sectional profile.
於另一實施例中,可利用熱壓、雷射、或蝕刻等方式對鄰近入光面12a的第一區域P的柱狀微結構14進行表面加工處理,使位於鄰近入光面12a的第一區域P的柱狀微結構(如圖5B所示)和位於較遠離入光面12a的第二區域Q的柱狀微結構(如圖5A所示)兩者的形狀不同。因第一區域P的柱狀微結構14進行了例如熱壓、雷射、或蝕刻等方式的表面處理,故其光散射能力可大於第二區域Q的柱狀微結構14的光散射能力,因此第一區域P具有較高的光線反射次數及光散射效果,使混光更加均勻而減輕鄰近入光面12a的亮暗帶分佈現象,提高導光板12的出光均勻性。需注意上述熱壓、雷射、或蝕刻的表面處理方式僅為例示而不限定,僅需對第一區域P的柱狀微結構14進行表面處理,使第一區域P的柱狀微結構14的截面外型、高度、角度等產生變化並相較第二區域Q的柱狀微結構14產生較高的光擴散能力即可。 In another embodiment, surface processing may be performed on the columnar microstructures 14 adjacent to the first area P of the light incident surface 12a by hot pressing, laser, or etching, so that the first microstructures 14 adjacent to the light incident surface 12a may be surface processed. The shapes of the columnar microstructures in one region P (as shown in FIG. 5B) and the columnar microstructures in the second region Q (shown in FIG. 5A) located farther from the light incident surface 12 a are different. Since the columnar microstructures 14 in the first region P are subjected to a surface treatment such as hot pressing, laser, or etching, their light scattering ability may be greater than that of the columnar microstructures 14 in the second region Q. Therefore, the first region P has a higher number of light reflections and a light scattering effect, which makes the mixed light more uniform, reduces the distribution of bright and dark bands adjacent to the light incident surface 12a, and improves the light uniformity of the light guide plate 12. It should be noted that the above-mentioned surface treatment methods of hot pressing, laser, or etching are merely examples and are not limited, and only the columnar microstructures 14 of the first region P need to be surface-treated to make the columnar microstructures 14 of the first region P The shape, height, angle, etc. of the cross section may be changed and the light diffusion capacity may be higher than that of the columnar microstructures 14 in the second region Q.
綜上所述,本發明的實施例至少具有以下其中一個優點,藉由上述各個實施例的設計,因對鄰近入光側的柱狀微結構進行表面處理,例如以表面加工方式改變微結構形狀或以光學材料填充微結構表面,即能局部地調整出光面的不同區域的光散射效果,達到以較簡易的方式減輕鄰近入光面的亮暗帶分佈及提高出光均勻性的目的。 In summary, the embodiments of the present invention have at least one of the following advantages. With the design of each of the above embodiments, the surface of the columnar microstructures adjacent to the light incident side is subjected to surface treatment, such as changing the microstructure shape by surface processing. Or filling the microstructured surface with optical materials, that is, the light scattering effect of different regions of the light emitting surface can be locally adjusted, so as to reduce the distribution of bright and dark bands adjacent to the light incident surface and improve the uniformity of light output in a relatively simple manner.
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,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. When the scope of implementation of the present invention cannot be limited by this, that is, the simple equivalent changes and modifications made according to the scope of the patent application and the description of the invention, All are still within the scope of the invention patent. In addition, any embodiment of the present invention or the scope of patent application does not need to achieve all the purposes or advantages or features disclosed by the invention. In addition, the terms "first" and "second" mentioned in this specification or the scope of the patent application are only used to name the components or distinguish the different embodiments. Or range, not an upper or lower limit on the number of components.
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JP2010244902A (en) * | 2009-04-07 | 2010-10-28 | Toshiba Mobile Display Co Ltd | Surface light source device, and liquid crystal display equipped therewith |
CN102809097A (en) * | 2012-07-09 | 2012-12-05 | 深圳市华星光电技术有限公司 | Backlight module and corresponding liquid crystal display device |
TW201250298A (en) * | 2011-06-03 | 2012-12-16 | Innocom Tech Shenzhen Co Ltd | Optical sheet and method for manufacturing the same and liquid crystal display device using the same |
TW201626005A (en) * | 2015-01-08 | 2016-07-16 | 中強光電股份有限公司 | Light guide plate and light source module |
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CN201228924Y (en) * | 2008-05-30 | 2009-04-29 | 瑞仪光电(南京)有限公司 | Structure for enhancing brightness of light conducting plate |
CN201298087Y (en) * | 2008-11-21 | 2009-08-26 | 扬昕精密股份有限公司 | Light guide board |
CN104344283B (en) * | 2013-08-01 | 2017-03-01 | 扬升照明股份有限公司 | Backlight module |
CN205809343U (en) * | 2016-04-12 | 2016-12-14 | 东莞轩朗实业有限公司 | A kind of glass light guide plate |
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JP2010244902A (en) * | 2009-04-07 | 2010-10-28 | Toshiba Mobile Display Co Ltd | Surface light source device, and liquid crystal display equipped therewith |
TW201250298A (en) * | 2011-06-03 | 2012-12-16 | Innocom Tech Shenzhen Co Ltd | Optical sheet and method for manufacturing the same and liquid crystal display device using the same |
CN102809097A (en) * | 2012-07-09 | 2012-12-05 | 深圳市华星光电技术有限公司 | Backlight module and corresponding liquid crystal display device |
TW201626005A (en) * | 2015-01-08 | 2016-07-16 | 中強光電股份有限公司 | Light guide plate and light source module |
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