TWI680316B - Illumination system and display apparatus thereof - Google Patents
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Abstract
一種照明系統，包括光源、導光板以及光子晶體結構。光源用於發出一光線。導光板用於導引光線，其中導光板具有一入光面。光子晶體結構緊貼設置於導光板的入光面上而形成薄膜狀，其中光子晶體結構的光子帶隙落在400奈米至450奈米的範圍內。此外，一種具有此照明系統的顯示裝置亦被提及。An illumination system includes a light source, a light guide plate, and a photonic crystal structure. The light source is used to emit a light. The light guide plate is used for guiding light, wherein the light guide plate has a light incident surface. The photonic crystal structure is closely arranged on the light incident surface of the light guide plate to form a thin film, and the photonic band gap of the photonic crystal structure falls within a range of 400 nm to 450 nm. In addition, a display device having such a lighting system is also mentioned.
Description
本發明是有關於一種照明系統及其顯示裝置。The invention relates to a lighting system and a display device thereof.
有研究指出，長時間曝露在藍光下會對人眼造成傷害。藍光為波長約400~500nm的光，其中波長在400~450nm的短波藍光因具有高能量，能穿透人眼的水晶體而到達視網膜，進而對黃斑部的感光細胞造成傷害，因此短波藍光對視網膜的危害程度最大。Some studies have pointed out that prolonged exposure to blue light can cause damage to human eyes. Blue light is light with a wavelength of about 400 to 500 nm. Among them, short-wave blue light with a wavelength of 400 to 450 nm has high energy and can penetrate the crystalline lens of the human eye to reach the retina, thereby causing damage to photoreceptor cells in the macula. The greatest degree of harm.
具有液晶顯示面板的電子裝置充斥在人們的日常生活之中，因此如何降低這些電子裝置所發出的藍光成為了重要的課題。然而，若將顯示器發出的所有藍光都濾除掉，將造成顯示畫面偏黃，進而影響顯示器的顯示效果。Electronic devices with liquid crystal display panels are pervasive in people's daily lives, so how to reduce the blue light emitted by these electronic devices has become an important issue. However, if all the blue light emitted by the display is filtered out, it will cause the display screen to be yellowish, which will affect the display effect of the display.
本發明提供一種照明系統，可有效阻擋藍光，且不會有光線偏黃的問題。The invention provides a lighting system which can effectively block blue light without the problem of yellowish light.
本發明的提供一種顯示裝置，應用上述的照明系統，因而可有效阻擋藍光，且不會有顯示畫面偏黃的問題。The present invention provides a display device that uses the above-mentioned lighting system, so it can effectively block blue light without the problem of yellowish display.
本發明的一實施例提出一種照明系統，包括光源、導光板以及光子晶體結構。光源用於發出一光線。導光板用於導引將光線，其中導光板具有一入光面。光子晶體結構緊貼設置於導光板的入光面上而形成薄膜狀，其中光子晶體結構的光子帶隙落在400奈米至450奈米的範圍內。An embodiment of the present invention provides a lighting system including a light source, a light guide plate, and a photonic crystal structure. The light source is used to emit a light. The light guide plate is used for guiding light, wherein the light guide plate has a light incident surface. The photonic crystal structure is closely arranged on the light incident surface of the light guide plate to form a thin film, and the photonic band gap of the photonic crystal structure falls within a range of 400 nm to 450 nm.
本發明的一實施例提出一種照明系統，包括光源、導光板、顯示器以及光子晶體結構。光源用於發出一光線。導光板用於導引光線，其中導光板具有一入光面。顯示器設置於導光板上。光子晶體結構緊貼設置於導光板的入光面上而形成薄膜狀，其中光子晶體結構的光子帶隙落在400奈米至450奈米的範圍內。An embodiment of the present invention provides a lighting system including a light source, a light guide plate, a display, and a photonic crystal structure. The light source is used to emit a light. The light guide plate is used for guiding light, wherein the light guide plate has a light incident surface. The display is arranged on the light guide plate. The photonic crystal structure is closely arranged on the light incident surface of the light guide plate to form a thin film, and the photonic band gap of the photonic crystal structure falls within a range of 400 nm to 450 nm.
在本發明的一實施例中，上述的光子晶體結構允許光線的第一部分通過且阻擋光線的第二部分，其中光線的第二部分的波長落在400奈米至450奈米的範圍內。In an embodiment of the present invention, the photonic crystal structure described above allows a first portion of light to pass through and blocks a second portion of light, wherein the wavelength of the second portion of light falls within a range of 400 nm to 450 nm.
在本發明的一實施例中，上述的導光板還具有一出光面，出光面連接於入光面。In an embodiment of the present invention, the light guide plate further includes a light emitting surface, and the light emitting surface is connected to the light incident surface.
在本發明的一實施例中，上述的入光面為一凹面。In an embodiment of the present invention, the light incident surface is a concave surface.
在本發明的一實施例中，上述的導光板還具有一出光面，出光面相對於入光面。In an embodiment of the present invention, the light guide plate further includes a light emitting surface, and the light emitting surface is opposite to the light incident surface.
在本發明的一實施例中，上述的光源包括次毫米發光二極體。In an embodiment of the present invention, the light source includes a sub-millimeter light emitting diode.
在本發明的一實施例中，上述的光子晶體結構包括交替堆疊的多個第一介電材料層和多個第二介電材料層，這些第一介電材料層不同於這些第二介電材料層。In an embodiment of the present invention, the above-mentioned photonic crystal structure includes a plurality of first dielectric material layers and a plurality of second dielectric material layers that are alternately stacked, and the first dielectric material layers are different from the second dielectric materials. Material layer.
基於上述，本發明的照明系統的光子晶體結構緊貼設置於導光板的入光面上，且光子晶體結構的光子帶隙落在400奈米至450奈米的範圍內，因此光子晶體結構可阻擋波長落在400奈米至450奈米的範圍內之光束通過。換言之，光子晶體結構可濾除危害程度較大的短波藍光，而非濾除所有藍光。如此一來，本發明的照明系統可有效阻擋藍光，且不會有光線偏黃的問題。另外，本發明的顯示裝置因應用上述的照明系統，因而可有效阻擋藍光，且不會有顯示畫面偏黃的問題。Based on the above, the photonic crystal structure of the illumination system of the present invention is closely arranged on the light incident surface of the light guide plate, and the photonic band gap of the photonic crystal structure falls within the range of 400 nm to 450 nm, so the photonic crystal structure can be Blocks light beams with wavelengths falling in the range of 400 nm to 450 nm. In other words, the photonic crystal structure can filter out the short-wave blue light which is more harmful, instead of filtering all blue light. In this way, the lighting system of the present invention can effectively block blue light without the problem of yellowish light. In addition, the display device of the present invention can effectively block blue light due to the application of the above-mentioned lighting system, and there is no problem that the display screen becomes yellowish.
為讓本發明的上述特徵和優點能更明顯易懂，下文特舉實施例，並配合所附圖式作詳細說明如下。In order to make the above features and advantages of the present invention more comprehensible, embodiments are hereinafter described in detail with reference to the accompanying drawings.
現將詳細地參考本發明的示範性實施例，示範性實施例的實例說明於附圖中。只要有可能，相同元件符號在圖式和描述中用來表示相同或相似部分。本發明亦可以各種不同的形式體現，而不應限於本文中所述的實施例。圖式中的層與區域的厚度會為了清楚起見而放大。相同或相似的參考號碼表示相同或相似的元件，以下段落將不再一一贅述。另外，實施例中所提到的方向用語，例如：上、下、左、右、前或後等，僅是參考附圖的方向。因此，使用的方向用語是用來說明並非用來限制本發明。Reference will now be made in detail to the exemplary embodiments of the present invention, examples of which are illustrated in the accompanying drawings. Wherever possible, the same reference numbers are used in the drawings and the description to refer to the same or like parts. The invention can also be embodied in various different forms and should not be limited to the embodiments described herein. The thicknesses of layers and regions in the drawings are exaggerated for clarity. The same or similar reference numbers indicate the same or similar elements, and the following paragraphs will not be repeated one by one. In addition, the directional terms mentioned in the embodiments, such as: up, down, left, right, front, or back, are only directions referring to the drawings. Therefore, the directional terms used are used to illustrate and not to limit the present invention.
圖1為本發明的一實施例之顯示裝置的剖面示意圖。圖2為圖1中的區域R1的放大示意圖。請參照圖1與圖2，本實施例的顯示裝置200包括照明系統100與顯示器210。照明系統100包括光源110、導光板120以及光子晶體（photonic crystal）結構130。光源110用於發出一光線L（標示於圖2）。導光板120用於導引光線L，其中導光板120具有一入光面120a。光子晶體結構130緊貼設置於導光板120的入光面120a上而形成薄膜狀，其中光子晶體結構130的光子帶隙（Photonic bandgap，PBG）落在400奈米至450奈米的範圍內。FIG. 1 is a schematic cross-sectional view of a display device according to an embodiment of the present invention. FIG. 2 is an enlarged schematic view of a region R1 in FIG. 1. Please refer to FIGS. 1 and 2. The display device 200 of this embodiment includes a lighting system 100 and a display 210. The lighting system 100 includes a light source 110, a light guide plate 120, and a photonic crystal structure 130. The light source 110 is configured to emit a light L (labeled in FIG. 2). The light guide plate 120 is used for guiding the light L. The light guide plate 120 has a light incident surface 120a. The photonic crystal structure 130 is closely disposed on the light incident surface 120a of the light guide plate 120 to form a thin film. The photonic bandgap (PBG) of the photonic crystal structure 130 falls within a range of 400 nm to 450 nm.
詳細來說，光子晶體是一種由不同介電質呈週期性分布而形成的規則光學結構，當波在不同介電質的週期性結構中傳播時，受晶格的週期性位勢散射，使得某些波段的電磁波因破壞性干涉而使其強度呈指數衰減，從而形成光子帶隙(Photonic bandgap，PBG)。而波長落在此光子帶隙範圍內的光無法在此結構中傳播，而會被光子結構完全反射回去。In detail, a photonic crystal is a regular optical structure formed by the periodic distribution of different dielectrics. When waves propagate in the periodic structure of different dielectrics, they are scattered by the periodic potential of the crystal lattice. Electromagnetic waves in some bands have an exponential decay in intensity due to destructive interference, thereby forming a photonic bandgap (PBG). And the light whose wavelength falls within this photon bandgap range cannot propagate in this structure, but will be completely reflected back by the photon structure.
因此，由於本實施例的光子晶體結構130的光子帶隙落在400奈米至450奈米的範圍內，使得光子晶體結構130允許光線L的第一部分L1通過且阻擋光線L的第二部分L2，其中光線L的第一部分L1的波長落在400奈米至450奈米以外的範圍內，而光線L的第二部分L2的波長落在400奈米至450奈米的範圍內。換言之，光子晶體結構130可濾除危害程度較大的短波藍光，使短波藍光無法通過光子晶體結構130而進入導光板120，因而無法傳遞至人眼，且光子晶體結構130並非濾除所有藍光（例如不濾除波長落在450奈米至500奈米的範圍內的長波藍光）。如此一來，本發明的照明系統100可有效阻擋藍光，且不會有光線偏黃的問題。另外，本發明的顯示裝置200因應用上述的照明系統100，因而可有效阻擋藍光，且不會有顯示畫面偏黃的問題。Therefore, since the photonic band gap of the photonic crystal structure 130 in this embodiment falls within the range of 400 nm to 450 nm, the photonic crystal structure 130 allows the first portion L1 of the light L to pass and blocks the second portion L2 of the light L The wavelength of the first part L1 of the light L falls within a range of 400 nm to 450 nm, and the wavelength of the second part L2 of the light L falls within a range of 400 nm to 450 nm. In other words, the photonic crystal structure 130 can filter short-wave blue light with a relatively high degree of harm, so that short-wave blue light cannot enter the light guide plate 120 through the photonic crystal structure 130, and thus cannot be transmitted to the human eye. The photonic crystal structure 130 does not filter all blue light For example, long-wave blue light with a wavelength in the range of 450 nm to 500 nm is not filtered out). In this way, the lighting system 100 of the present invention can effectively block blue light without the problem of yellowish light. In addition, the display device 200 of the present invention can effectively block blue light due to the application of the lighting system 100 described above, and there is no problem that the display screen becomes yellowish.
在本實施例中，光子晶體結構130例如可包括交替堆疊的多個第一介電材料層132和多個第二介電材料層134。第一介電材料層132不同於第二介電材料層134。第一介電材料層132和第二介電材料層134例如可藉由物理氣相沉積（例如蒸鍍）、化學氣相沉積、溶膠凝膠（sol-gel）法或其他適當的方法來形成。圖2中的多個第一介電材料層132和多個第二介電材料層134的數目僅為示意性說明，光子晶體結構130可包括更多或更少的第一介電材料層132和第二介電材料層134。此外，第一介電材料層132的折射率可不同於第二介電材料層134的折射率。第一介電材料層132的第一厚度D1可不同於第二介電材料層134的第二厚度D2，或者第一介電材料層132的第一厚度D1可相同於第二介電材料層134的第二厚度D2。In this embodiment, the photonic crystal structure 130 may include, for example, a plurality of first dielectric material layers 132 and a plurality of second dielectric material layers 134 that are alternately stacked. The first dielectric material layer 132 is different from the second dielectric material layer 134. The first dielectric material layer 132 and the second dielectric material layer 134 may be formed by, for example, physical vapor deposition (such as evaporation), chemical vapor deposition, a sol-gel method, or other appropriate methods. . The number of the plurality of first dielectric material layers 132 and the plurality of second dielectric material layers 134 in FIG. 2 is only a schematic illustration, and the photonic crystal structure 130 may include more or fewer first dielectric material layers 132. And the second dielectric material layer 134. In addition, the refractive index of the first dielectric material layer 132 may be different from the refractive index of the second dielectric material layer 134. The first thickness D1 of the first dielectric material layer 132 may be different from the second thickness D2 of the second dielectric material layer 134, or the first thickness D1 of the first dielectric material layer 132 may be the same as the second dielectric material layer The second thickness D2 of 134.
具體來說，由於光子晶體的光子帶隙取決於光子晶體的材料、週期或填充因子（filling fraction）等因素，因此透過適當的設計，可得到具有對應的光子帶隙的光子晶體。舉例來說，在一實施例中，第一介電材料層132和多個第二介電材料層134的其中之一可以是氧化鎂（折射率約1.7），另一者可以是二氧化鈦（折射率約2.4）。在此實施例中，第一介電材料層132例如是折射率較低的氧化鎂且具有第一厚度D1，第二介電材料層134例如是折射率較高的二氧化鈦且具有第二厚度D2，且光子晶體結構130例如是以20層氧化鎂及20層二氧化鈦彼此交替排列而成。第一厚度D1例如是約0.85個週期Dp，第二厚度D2例如是約0.15個週期Dp，週期Dp為第一厚度D1和第二厚度D2之和。舉例來說，週期Dp可為約117 nm，第一厚度D1可為約99.45 nm，而第二厚度D2可為約11.55 nm。透過上述設計，光子晶體結構130的光子帶隙可落在約403.5 nm至約450 nm之間。Specifically, since the photonic band gap of a photonic crystal depends on factors such as the material, period, or filling fraction of the photonic crystal, a photonic crystal having a corresponding photonic band gap can be obtained through proper design. For example, in one embodiment, one of the first dielectric material layer 132 and the plurality of second dielectric material layers 134 may be magnesium oxide (refractive index is about 1.7), and the other may be titanium dioxide (refraction) Rate is about 2.4). In this embodiment, the first dielectric material layer 132 is, for example, magnesium oxide with a low refractive index and has a first thickness D1, and the second dielectric material layer 134 is, for example, titanium dioxide with a high refractive index and has a second thickness D2 The photonic crystal structure 130 is, for example, formed by alternately arranging 20 layers of magnesium oxide and 20 layers of titanium dioxide. The first thickness D1 is, for example, about 0.85 periods Dp, and the second thickness D2 is, for example, about 0.15 periods Dp. The period Dp is the sum of the first thickness D1 and the second thickness D2. For example, the period Dp may be about 117 nm, the first thickness D1 may be about 99.45 nm, and the second thickness D2 may be about 11.55 nm. Through the above design, the photonic band gap of the photonic crystal structure 130 may fall between about 403.5 nm and about 450 nm.
在另一實施例中，第一介電材料層132和多個第二介電材料層134的其中之一可以是磷酸二氫鉀（KH 2PO 4）（折射率約1.5），另一者可以是五氧化二鈮（Nb 2O 5）（折射率約2.5）。在此實施例中，第一介電材料層132例如是折射率較低的磷酸二氫鉀且具有第一厚度D1，第二介電材料層134例如是折射率較高的五氧化二鈮具有第二厚度D2，且光子晶體結構130例如是以8層磷酸二氫鉀及8層五氧化二鈮彼此交替排列而成。第一厚度D1例如是約0.6個週期Dp，第二厚度D2例如是約0.4個週期Dp，週期Dp為第一厚度D1和第二厚度D2之和。舉例來說，週期Dp可為約340 nm，第一厚度D1可為約204 nm，而第二厚度D2可為約136 nm。透過上述設計，光子晶體結構130的光子帶隙可落在約409.6 nm至約453.3 nm之間。 In another embodiment, one of the first dielectric material layer 132 and the plurality of second dielectric material layers 134 may be potassium dihydrogen phosphate (KH 2 PO 4 ) (refractive index is about 1.5), and the other It may be niobium pentoxide (Nb 2 O 5 ) (refractive index about 2.5). In this embodiment, the first dielectric material layer 132 is, for example, potassium dihydrogen phosphate with a lower refractive index and has a first thickness D1, and the second dielectric material layer 134 is, for example, niobium pentoxide with a higher refractive index. The second thickness D2 and the photonic crystal structure 130 are formed by alternately arranging eight layers of potassium dihydrogen phosphate and eight layers of niobium pentoxide. The first thickness D1 is, for example, about 0.6 periods Dp, and the second thickness D2 is, for example, about 0.4 periods Dp. The period Dp is the sum of the first thickness D1 and the second thickness D2. For example, the period Dp may be about 340 nm, the first thickness D1 may be about 204 nm, and the second thickness D2 may be about 136 nm. Through the above design, the photonic band gap of the photonic crystal structure 130 can fall between about 409.6 nm and about 453.3 nm.
然而，上述實施例之條件僅為示意性說明，而非用以限制本發明，任何光子帶隙落在400奈米至450奈米之間的光子晶體結構皆在本發明所保護的範圍內。However, the conditions of the foregoing embodiments are only for illustrative purposes, and are not intended to limit the present invention. Any photonic crystal structure with a photonic band gap between 400 nm and 450 nm is within the scope of the present invention.
此外，本實施例的光子晶體結構130是以兩個不同的介電材料沿單一方向（例如是圖2中的上下方向）週期性交錯排列的一維光子晶體為例，然而在其他實施例中，光子晶體結構也可以是兩個不同的介電材料沿兩個方向週期性交錯排列的二維光子晶體，或是兩個不同的介電材料沿三個方向週期性交錯排列的三維光子晶體，本發明不以此為限。In addition, the photonic crystal structure 130 of this embodiment is an example of one-dimensional photonic crystals that are periodically staggered in a single direction (for example, the up-down direction in FIG. 2) by two different dielectric materials, but in other embodiments, The photonic crystal structure can also be a two-dimensional photonic crystal in which two different dielectric materials are periodically staggered in two directions, or a three-dimensional photonic crystal in which two different dielectric materials are periodically staggered in three directions. The invention is not limited to this.
請再次參照圖1，本實施例的照明系統100例如是直下式的背光模組，其光源110設置於導光板120下方，且導光板120還具有一出光面120b，其中出光面120b相對於入光面120a。在本實施例中，光源110例如包括次毫米發光二極體（Mini LED），其尺寸大約是一百至數百毫米。需說明的是，由於光子晶體的光子帶隙會受到光束入射角度的影響，當光束並非垂直入射（即，入射角並非0度）至光子晶體時，光子帶隙可能會產生偏移，因而可能造成過濾藍光的效果變差或是過濾到不想被過濾的波段。因此，相較於傳統的發光二極體光源，本實施例的光源110所使用的次毫米發光二極體具有較小的尺寸，可減少發出斜向光線，進而可避免帶隙偏移所產生的影響。Please refer to FIG. 1 again. The lighting system 100 of this embodiment is, for example, a direct type backlight module. The light source 110 is disposed below the light guide plate 120, and the light guide plate 120 also has a light exit surface 120b. Smooth surface 120a. In this embodiment, the light source 110 includes, for example, a sub-millimeter light emitting diode (Mini LED), and its size is about one hundred to several hundred millimeters. It should be noted that, because the photonic band gap of a photonic crystal is affected by the incident angle of the beam, when the beam is not perpendicularly incident (that is, the incident angle is not 0 degrees) to the photonic crystal, the photonic band gap may be shifted, so Causes the effect of filtering blue light to be worse or to filter to a band which is not desired to be filtered. Therefore, compared with the conventional light-emitting diode light source, the sub-millimeter light-emitting diode used in the light source 110 of this embodiment has a smaller size, which can reduce the emission of oblique light, and thus can avoid the generation of band gap shift. Impact.
此外，本實施例的顯示器210位於導光板120上，且顯示器210例如是透過光學膜220而接合至導光板120。在本實施例中，顯示器210例如是液晶顯示（liquid crystal display，LCD）面板，光學膜220例如是光學膠（optical clear adhesive，OCA）等透明連接材料，然本發明並不以此為限。另外，顯示裝置200還可包括觸控層230和外框240。觸控層230位於顯示器210上，其可以外掛式，也可以是內嵌式。外框240提供支撐及保護的作用。In addition, the display 210 of this embodiment is located on the light guide plate 120, and the display 210 is bonded to the light guide plate 120 through the optical film 220, for example. In this embodiment, the display 210 is, for example, a liquid crystal display (LCD) panel, and the optical film 220 is, for example, a transparent connection material such as an optical clear adhesive (OCA). However, the present invention is not limited thereto. In addition, the display device 200 may further include a touch layer 230 and an outer frame 240. The touch layer 230 is located on the display 210 and can be an external type or an embedded type. The outer frame 240 provides support and protection.
圖3為本發明的另一實施例之顯示裝置的照明系統的剖面示意圖。圖4為圖3中的區域R2的放大示意圖。圖1及圖2中的顯示裝置200的照明系統100也可置換成本實施例的照明系統300。請參照圖3與圖4，本實施例的照明系統300與圖1及圖2中的照明系統100相似，其主要差異在於本實施例的照明系統300例如是側光式的背光模組，其光源310設置於導光板320的側邊，且導光板120的入光面320a連接於出光面320b。3 is a schematic cross-sectional view of a lighting system of a display device according to another embodiment of the present invention. FIG. 4 is an enlarged schematic view of a region R2 in FIG. 3. The lighting system 100 of the display device 200 in FIGS. 1 and 2 may be replaced with the lighting system 300 of the embodiment. Please refer to FIG. 3 and FIG. 4. The lighting system 300 of this embodiment is similar to the lighting system 100 of FIGS. 1 and 2. The main difference is that the lighting system 300 of this embodiment is, for example, an edge-lit backlight module. The light source 310 is disposed on a side of the light guide plate 320, and the light incident surface 320a of the light guide plate 120 is connected to the light exit surface 320b.
本實施例的光子晶體結構330設置於導光板320的入光面320a上，光子晶體結構330的相關描述可參考前述實施例的光子晶體結構130，於此不再贅述。The photonic crystal structure 330 of this embodiment is disposed on the light incident surface 320a of the light guide plate 320. For related descriptions of the photonic crystal structure 330, refer to the photonic crystal structure 130 of the foregoing embodiment, and details are not described herein again.
如圖4所示，導光板320的入光面320a可為一凹面，而光子晶體結構330共形地設置於入光面320a上而形成薄膜狀，因此光子晶體結構330亦呈現凹狀。值得說明的是，此凹面設計可使光源310發出的光線L盡量是垂直入射（即，入射角接近0度）至光子晶體結構330，進而可避免帶隙偏移所產生的影響。在其他實施例中，導光板320的入光面320a也可以為平面（未繪示），本發明並不以此為限。As shown in FIG. 4, the light incident surface 320 a of the light guide plate 320 may be a concave surface, and the photonic crystal structure 330 is conformally disposed on the light incident surface 320 a to form a thin film. Therefore, the photonic crystal structure 330 also has a concave shape. It is worth noting that this concave design allows the light L emitted from the light source 310 to enter the photonic crystal structure 330 as vertically as possible (that is, the incident angle is close to 0 degrees), so as to avoid the influence caused by the band gap shift. In other embodiments, the light incident surface 320a of the light guide plate 320 may be a flat surface (not shown), and the present invention is not limited thereto.
綜上所述，本發明的照明系統的光子晶體結構設置於導光板的入光面上，且光子晶體結構的光子帶隙落在400奈米至450奈米的範圍內，因此光子晶體結構可阻擋波長落在400奈米至450奈米的範圍內之光束通過。換言之，光子晶體結構可濾除危害程度較大的短波藍光，而非濾除所有藍光。如此一來，本發明的照明系統可有效阻擋藍光，且不會有光線偏黃的問題。另外，本發明的顯示裝置因應用上述的照明系統，因而可有效阻擋藍光，且不會有顯示畫面偏黃的問題。In summary, the photonic crystal structure of the lighting system of the present invention is set on the light incident surface of the light guide plate, and the photonic band gap of the photonic crystal structure falls within the range of 400 nm to 450 nm. Blocks light beams with wavelengths falling in the range of 400 nm to 450 nm. In other words, the photonic crystal structure can filter out the short-wave blue light which is more harmful, instead of filtering all blue light. In this way, the lighting system of the present invention can effectively block blue light without the problem of yellowish light. In addition, the display device of the present invention can effectively block blue light due to the application of the above-mentioned lighting system, and there is no problem that the display screen becomes yellowish.
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 as above with the examples, it is not intended to limit the present invention. Any person with ordinary knowledge in the technical field can make some modifications and retouching without departing from the spirit and scope of the present invention. The protection scope of the present invention shall be determined by the scope of the attached patent application.
100、300‧‧‧照明系統
110、310‧‧‧光源
120、320‧‧‧導光板
120a、320a‧‧‧入光面
120b、320b‧‧‧出光面
130、330‧‧‧光子晶體結構
132‧‧‧第一介電材料層
134‧‧‧第二介電材料層
200‧‧‧顯示裝置
210‧‧‧顯示器
220‧‧‧光學膜
230‧‧‧觸控層
240‧‧‧外框
D1‧‧‧第一厚度
D2‧‧‧第二厚度
Dp‧‧‧週期
L‧‧‧光線
L1‧‧‧第一部分
L2‧‧‧第二部分
R1、R2‧‧‧區域
100, 300‧‧‧ lighting system
110, 310‧‧‧ light source
120, 320‧‧‧ light guide plate
120a, 320a ‧‧‧ entrance surface
120b, 320b‧‧‧ smooth surface
130, 330‧‧‧photonic crystal structure
132‧‧‧first dielectric material layer
134‧‧‧second dielectric material layer
200‧‧‧ display device
210‧‧‧ Display
220‧‧‧Optical film
230‧‧‧touch layer
240‧‧‧ frame
D1‧‧‧First thickness
D2‧‧‧Second thickness
Dp‧‧‧cycle
L‧‧‧light
L1‧‧‧ Part I
L2‧‧‧ Part Two
R1, R2‧‧‧ area
圖1為本發明的一實施例之顯示裝置的剖面示意圖。
圖2為圖1中的區域R1的放大示意圖。
圖3為本發明的另一實施例之顯示裝置的照明系統的剖面示意圖。
圖4為圖3中的區域R2的放大示意圖。
FIG. 1 is a schematic cross-sectional view of a display device according to an embodiment of the present invention.
FIG. 2 is an enlarged schematic view of a region R1 in FIG. 1.
3 is a schematic cross-sectional view of a lighting system of a display device according to another embodiment of the present invention.
FIG. 4 is an enlarged schematic view of a region R2 in FIG. 3.
Claims (6)
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