TWI847681B - Light guide assembly and display device - Google Patents

Light guide assembly and display device Download PDF

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TWI847681B
TWI847681B TW112117100A TW112117100A TWI847681B TW I847681 B TWI847681 B TW I847681B TW 112117100 A TW112117100 A TW 112117100A TW 112117100 A TW112117100 A TW 112117100A TW I847681 B TWI847681 B TW I847681B
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light guide
material layer
layer
coating layer
disposed
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TW112117100A
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Chinese (zh)
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TW202414058A (en
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蘇振豪
鄧嘉峰
林進偉
哀嘉華
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大陸商南京瀚宇彩欣科技有限責任公司
瀚宇彩晶股份有限公司
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Abstract

A light guide assembly includes a light guide plate, a first coating layer, a second coating layer and an optical control layer. The light guide plate has a first surface and a second surface facing away from each other, one of the surfaces has microstructures. The first coating layer is arranged on the first surface, and the second coating layer is arranged on the second surface. The optical control layer is disposed on the first coating layer and includes first material layers and second material layers stacked alternately. The refractive index of the first material layers is different from that of the second material layers. Thereby, the light emitting effect can be improved.

Description

導光組件與顯示裝置Light guide assembly and display device

本揭露是有關於一種導光組件與使用此導光組件的前光式顯示裝置。The present disclosure relates to a light guide assembly and a front-lit display device using the light guide assembly.

前光式顯示裝置是指光源來自顯示面板的顯示側(而非背側)，通常包括反射式顯示面板與導光板，導光板將光線導入至反射式顯示面板，經由反射後射向觀看者。導光板為了在表面形成精密細微的微結構一般會採用奈米壓印或熱壓印方式來製備，藉由改變這些微結構的形狀與尺寸來達到導光板頂部均勻出光的效果，目前常見的微結構樣式不外乎凹點或凸點，至於微結構外觀形狀中又以圓型、V型、三角形等較普遍，但由於這些微結構的樣式與形狀特殊且高度僅在數微米到數百微米之間以致壓印模塊成本高又加工不易。此外，當光源射向導光板時，有部分的光線會直接射向外側(沒有射向反射式顯示面板)，降低了出光效果。Front-lit display devices refer to devices where the light source comes from the display side (not the back side) of the display panel. They usually include a reflective display panel and a light guide plate. The light guide plate guides the light into the reflective display panel, where it is reflected and then emitted to the viewer. In order to form precise and fine microstructures on the surface of the light guide plate, nano-imprinting or hot-imprinting methods are generally used to prepare the light guide plate. By changing the shape and size of these microstructures, the light is evenly emitted from the top of the light guide plate. Currently, the most common microstructure patterns are concave or convex points. As for the appearance of the microstructure, circular, V-shaped, triangular, etc. are more common. However, due to the special patterns and shapes of these microstructures and the height of only a few micrometers to hundreds of micrometers, the imprinting module is expensive and difficult to process. In addition, when the light source is directed toward the light guide plate, part of the light will be directed directly toward the outside (not toward the reflective display panel), thereby reducing the light output effect.

本揭露的實施例提出一種導光組件，包括導光板、第一鍍膜層、第二鍍膜層與光學調控層。導光板具有彼此背離的第一表面與第二表面，第一表面與第二表面的其中之一上具有微結構，其中微結構具有同時背離第一表面與第二表面的頂點。第一鍍膜層設置於導光板的第一表面。第二鍍膜層設置於導光板的第二表面。光學調控層，設置於第一鍍膜層之上，其中第一鍍膜層設置在導光板與光學調控層之間，光學調控層包含多層彼此交互堆疊的第一材料層與第二材料層，其中第一材料層的折射率與第二材料層的折射率不相同。The disclosed embodiment provides a light guide assembly, including a light guide plate, a first coating layer, a second coating layer and an optical control layer. The light guide plate has a first surface and a second surface facing away from each other, and a microstructure is provided on one of the first surface and the second surface, wherein the microstructure has a vertex facing away from both the first surface and the second surface. The first coating layer is disposed on the first surface of the light guide plate. The second coating layer is disposed on the second surface of the light guide plate. The optical control layer is disposed on the first coating layer, wherein the first coating layer is disposed between the light guide plate and the optical control layer, and the optical control layer includes a plurality of first material layers and second material layers alternately stacked with each other, wherein the refractive index of the first material layer is different from the refractive index of the second material layer.

在一些實施例中，微結構設置於第一表面上，第一鍍膜層的厚度大於頂點的高度。In some embodiments, the microstructure is disposed on the first surface, and the thickness of the first coating layer is greater than the height of the vertex.

在一些實施例中，微結構設置於第二表面上，第二鍍膜層的厚度大於頂點的高度。In some embodiments, the microstructure is disposed on the second surface, and the thickness of the second coating layer is greater than the height of the vertex.

在一些實施例中，第二材料層設置於第一材料層與第一鍍膜層之間，第二材料層的折射率大於第一鍍膜層的折射率。In some embodiments, the second material layer is disposed between the first material layer and the first coating layer, and the refractive index of the second material layer is greater than the refractive index of the first coating layer.

在一些實施例中，第一材料層的折射率小於第二材料層的折射率。In some embodiments, the refractive index of the first material layer is less than the refractive index of the second material layer.

在一些實施例中，第一材料層的折射率小於第二材料層的折射率，其中一個第二材料層接觸第一鍍膜層，其中一個第一材料層形成出光面。In some embodiments, the refractive index of the first material layer is less than the refractive index of the second material layer, wherein one of the second material layers contacts the first coating layer, and wherein one of the first material layers forms a light emitting surface.

在一些實施例中，光學調控層的厚度為1/4λ的整數倍，且第一材料層與第二材料層交錯堆疊的層數為偶數倍，其中λ為目標波長。In some embodiments, the thickness of the optical modulation layer is an integer multiple of 1/4λ, and the number of the first material layer and the second material layer alternately stacked is an even multiple, where λ is the target wavelength.

以另一個角度來說，本揭露的實施例提出一種顯示裝置，包括反射式顯示面板與導光組件。反射式顯示面板具有彼此背離的顯示側與背側。導光組件設置在反射式顯示面板的顯示側，導光組件包括導光板、第一鍍膜層、第二鍍膜層與光學調控層。導光板具有彼此背離的第一表面與第二表面，其中第二表面相對反射式顯示面板，第一表面與第二表面的其中之一上具有微結構。第一鍍膜層設置於導光板的第一表面。第二鍍膜層設置於導光板的第二表面。光學調控層設置於第一鍍膜層之上，其中第一鍍膜層設置在導光板與光學調控層之間，光學調控層包含多層彼此交互堆疊的第一材料層與第二材料層，其中第一材料層的折射率與第二材料層的折射率不相同。From another perspective, the embodiment of the present disclosure proposes a display device, including a reflective display panel and a light guide assembly. The reflective display panel has a display side and a back side facing away from each other. The light guide assembly is disposed on the display side of the reflective display panel, and the light guide assembly includes a light guide plate, a first coating layer, a second coating layer, and an optical control layer. The light guide plate has a first surface and a second surface facing away from each other, wherein the second surface is opposite to the reflective display panel, and a microstructure is provided on one of the first surface and the second surface. The first coating layer is disposed on the first surface of the light guide plate. The second coating layer is disposed on the second surface of the light guide plate. The optical control layer is disposed on the first coating layer, wherein the first coating layer is disposed between the light guide plate and the optical control layer, and the optical control layer includes a plurality of first material layers and second material layers alternately stacked with each other, wherein the refractive index of the first material layer is different from the refractive index of the second material layer.

在一些實施例中，顯示裝置還包括發光元件，設置在導光板的第三表面，第三表面連接第一表面與第二表面。In some embodiments, the display device further includes a light emitting element disposed on a third surface of the light guide plate, and the third surface connects the first surface and the second surface.

在一些實施例中，光學調控層設置於顯示裝置的最外側以做為顯示裝置的外觀元件。In some embodiments, the optical control layer is disposed on the outermost side of the display device to serve as an appearance element of the display device.

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 clearly understood, embodiments are specifically cited below and described in detail with reference to the accompanying drawings.

關於本文中所使用之「第一」、「第二」等，並非特別指次序或順位的意思，其僅為了區別以相同技術用語描述的元件或操作。The terms “first,” “second,” etc. used herein do not particularly refer to order or sequence, but are only used to distinguish elements or operations described with the same technical term.

圖1是根據一實施例繪示顯示裝置的示意圖。請參照圖1，顯示裝置100包括了反射式顯示面板110、發光元件120與導光組件130。反射式顯示面板110具有彼此背離的顯示側111與背側112，反射式顯示面板110設置有反射結構(未繪示)可以將入射至顯示側111的光線反射回去。在一些實施例中，反射式顯示面板110與導光組件130之間可以設置貼合膠。FIG1 is a schematic diagram of a display device according to an embodiment. Referring to FIG1 , the display device 100 includes a reflective display panel 110, a light emitting element 120, and a light guide assembly 130. The reflective display panel 110 has a display side 111 and a back side 112 that are separated from each other. The reflective display panel 110 is provided with a reflective structure (not shown) that can reflect back light incident on the display side 111. In some embodiments, a bonding adhesive can be provided between the reflective display panel 110 and the light guide assembly 130.

導光組件130設置在反射式顯示面板110的顯示側111。導光組件130包括了導光板131、鍍膜層133、鍍膜層134以及光學調控層135。導光板131具有彼此背離的第一表面131a與第二表面131b，以及連接至第一表面131a與第二表面131b的第三表面131c。發光元件120設置在第三表面131c，發光元件120例如為發光二極體。第二表面131b相對於(面向)反射式顯示面板110，且第二表面131b上設置有微結構132，微結構132是從第二表面131b向外凸起，也就是說微結構132的頂點141同時背離第一表面131a與第二表面131b。鍍膜層133設置於第二表面131b，鍍膜層133會覆蓋微結構132，且會覆蓋微結構132的頂點141。另外，在其他實施例中鍍膜層133的厚度t例如可以大於頂點141相對於第二表面131b的高度，但不以此為限。另一方面，鍍膜層134形成在第一表面131a，光學調控層135設置在鍍膜層134之上，鍍膜層134是設置在導光板131與光學調控層135之間。鍍膜層133與鍍膜層134可提供堅硬的表面，用以保護導光板131。光學調控層135包含了第一材料層135a與第二材料層135b，其中第一材料層135a的折射率與第二材料層135b的折射率不相同。為了簡化起見，在圖1中僅繪示了一層第一材料層135a與一層第二材料層135b，但在一些實施例中可以設置多層的第一材料層135a與多層的第二材料層135b，這些第一材料層135a與第二材料層135b會彼此交互堆疊。The light guide assembly 130 is disposed on the display side 111 of the reflective display panel 110. The light guide assembly 130 includes a light guide plate 131, a coating layer 133, a coating layer 134, and an optical control layer 135. The light guide plate 131 has a first surface 131a and a second surface 131b that are opposite to each other, and a third surface 131c connected to the first surface 131a and the second surface 131b. The light emitting element 120 is disposed on the third surface 131c, and the light emitting element 120 is, for example, a light emitting diode. The second surface 131b is opposite to (facing) the reflective display panel 110, and a microstructure 132 is disposed on the second surface 131b. The microstructure 132 protrudes outward from the second surface 131b, that is, the vertex 141 of the microstructure 132 is away from the first surface 131a and the second surface 131b at the same time. The coating layer 133 is disposed on the second surface 131b, and the coating layer 133 covers the microstructure 132 and the vertex 141 of the microstructure 132. In addition, in other embodiments, the thickness t of the coating layer 133 may be, for example, greater than the height of the vertex 141 relative to the second surface 131b, but is not limited thereto. On the other hand, the coating layer 134 is formed on the first surface 131a, and the optical control layer 135 is disposed on the coating layer 134. The coating layer 134 is disposed between the light guide plate 131 and the optical control layer 135. The coating layer 133 and the coating layer 134 can provide a hard surface to protect the light guide plate 131. The optical control layer 135 includes a first material layer 135a and a second material layer 135b, wherein the refractive index of the first material layer 135a is different from the refractive index of the second material layer 135b. For simplicity, FIG. 1 only shows one first material layer 135a and one second material layer 135b. However, in some embodiments, multiple first material layers 135a and multiple second material layers 135b may be provided, and these first material layers 135a and second material layers 135b may be alternately stacked.

在圖1的實施例中，微結構132為凸起的半圓形，但在其他實施例中也可以為凸起的三角形或任意形狀。此外，微結構132也可以是沿著某一方向延伸，或是分佈在二維平面上，本揭露並不限制微結構132的形狀與分佈。例如，微結構132之間可具有一預設的間隙，此預設間隙可依使用者的需求改變來調整微結構132以較密或較疏的方式來分佈。在一些實施例中，微結構132在二維平面上可以有分布密度不同的區域，例如在二維平面的中心有密度較高的區域，而中心周圍有密度較低的區域。In the embodiment of FIG. 1 , the microstructure 132 is a raised semicircle, but in other embodiments, it may be a raised triangle or any shape. In addition, the microstructure 132 may extend in a certain direction or be distributed on a two-dimensional plane. The present disclosure does not limit the shape and distribution of the microstructure 132. For example, there may be a preset gap between the microstructures 132, and this preset gap may be changed according to the needs of the user to adjust the microstructure 132 to be distributed in a denser or sparser manner. In some embodiments, the microstructure 132 may have regions with different distribution densities on a two-dimensional plane, such as a region with higher density in the center of the two-dimensional plane and a region with lower density around the center.

圖2是根據一實施例繪示光學調控層與導光板的光路示意圖。請參照圖2，為了簡化起見，在圖2並未繪示微結構132與鍍膜層133。在此實施例中有兩層第一材料層135a與兩層第二材料層135b，其中最下層的第二材料層135b接觸鍍膜層134且設置於第一材料層135a與鍍膜層134之間，而最上層的第一材料層135a則形成出光面210。第二材料層135b的折射率大於鍍膜層134的折射率，而第一材料層135a的折射率小於第二材料層135b的折射率。發光元件120從導光板131的側邊提供光線，當光線從導光板131的內部射向鍍膜層134時，如果入射角 小於一臨界角 ，則光線中有部分會從出光面210射出，有一部分的光線則被反射回導光板131，再射向反射式顯示面板110。另一方面，如果入射角 大於臨界角 ，則光線會被全反射回到導光板131，再射向反射式顯示面板110。反射式顯示面板110設置有偏光片、顯示介質(例如液晶)、像素電極、共同電極等元件，被反射式顯示面板110反射的光線則透過導光板131往上經由出光面210射出。在此實施例中由於設置了光學調控層135，透過折射率不同的第一材料層135a與第二材料層135b可反射部分的光線，這可以回收原本由發光元件120進入導光板131直接向上射出的光線，有助於增加光線反射到反射式顯示面板110的效果。在習知技術中並沒有設置光學調控層135，當入射角 小於臨界角 時大部分的光線會直接向外射出，無法射向反射式顯示面板110，因此反射式顯示面板110所提供的顯示效果較差。 FIG2 is a schematic diagram showing the optical path of the optical control layer and the light guide plate according to an embodiment. Please refer to FIG2. For the sake of simplicity, the microstructure 132 and the coating layer 133 are not shown in FIG2. In this embodiment, there are two first material layers 135a and two second material layers 135b, wherein the bottom second material layer 135b contacts the coating layer 134 and is disposed between the first material layer 135a and the coating layer 134, and the top first material layer 135a forms the light emitting surface 210. The refractive index of the second material layer 135b is greater than the refractive index of the coating layer 134, and the refractive index of the first material layer 135a is less than the refractive index of the second material layer 135b. The light emitting element 120 provides light from the side of the light guide plate 131. When the light is emitted from the inside of the light guide plate 131 to the coating layer 134, if the incident angle is Less than a critical angle , then part of the light will be emitted from the light emitting surface 210, and part of the light will be reflected back to the light guide plate 131 and then emitted to the reflective display panel 110. On the other hand, if the incident angle Greater than critical angle , the light will be totally reflected back to the light guide plate 131 and then emitted to the reflective display panel 110. The reflective display panel 110 is provided with components such as a polarizer, a display medium (such as liquid crystal), a pixel electrode, and a common electrode. The light reflected by the reflective display panel 110 passes through the light guide plate 131 and is emitted upward through the light emitting surface 210. In this embodiment, since an optical control layer 135 is provided, part of the light can be reflected through the first material layer 135a and the second material layer 135b having different refractive indices. This can recycle the light that originally enters the light guide plate 131 from the light-emitting element 120 and is emitted directly upward, which helps to increase the effect of reflecting the light to the reflective display panel 110. In the known technology, no optical control layer 135 is provided. When the incident angle is Less than critical angle Most of the light will be emitted directly outwards and cannot be emitted to the reflective display panel 110, so the display effect provided by the reflective display panel 110 is poor.

為了達到較佳的光學效果，光學調控層135的厚度為 λ的整數倍，例如第一材料層135a與第二材料層135b的厚度都為 λ的n倍，其中λ為目標波長，也就是發光元件120所射出光線的波長，n為正整數。此外，第一材料層135a與第二材料層135b交錯堆疊的層數為偶數倍(圖2的實施例為4層)。 In order to achieve a better optical effect, the thickness of the optical control layer 135 is An integer multiple of λ, for example, the thickness of the first material layer 135a and the second material layer 135b are both n times of λ, where λ is the target wavelength, that is, the wavelength of the light emitted by the light emitting element 120, and n is a positive integer. In addition, the number of layers of the first material layer 135a and the second material layer 135b alternately stacked is an even multiple (4 layers in the embodiment of FIG. 2 ).

請參照圖1，導光板131的材料可包括聚碳酸酯(PC)、聚丙烯酸(PMMA)或其他合適的材料。鍍膜層133與鍍膜層134的材料可包含適合的樹酯材料或無機化合物，其中無機化合物的阻絕水氣能力較佳，此無機化合物例如包括金屬氧化物(如:Al 2O 3/Ti 3O 5)、二氧化矽(SiO 2)、氮化矽(如:SiNx)和金屬氮化物(如:TiN)等。在一些實施例中，鍍膜層133與鍍膜層134的厚度達200 nm以上。在一些實施例中，鍍膜層133(或鍍膜層134)的熱膨脹係數與導光板131的熱膨脹係數之間的差距小於一臨界值，避免因為熱膨脹形成龜裂的問題。舉例來說，導光板131的材料包括聚碳酸酯，熱膨脹係數為6.8 x 10-5/℃，而鍍膜層133(或鍍膜層134)的材料包括二氧化矽，熱膨脹係數為5.0 x 10 -5/℃，兩者的差值約為1.8 x 10 -5/℃，因此該臨界值必須大於1.8 x 10-5/℃，以對抗熱形變。在一些實施例中，鍍膜層133與鍍膜層134也包括堆疊一層以上的材料。舉例來說，鍍膜層133(或鍍膜層134)中包括了兩層薄膜硬化材料，鍍膜層133(或鍍膜層134)的第一層薄膜硬化材料為二氧化矽 (折射率=1.46，熱膨脹係數=5.0 x 10 -5/℃)。鍍膜層133(或鍍膜層134)的第一層薄膜硬化材料之上則堆疊了第二薄膜硬化材料，例如為NaF(折射率=1.3，熱膨脹係數=3.9 x 10 -5/℃)。此外，第一材料層135a與第二材料層135b可包含金屬化合物(例如MgF 2、NdF 3、CeF 3等)與氧化物(例如SiO 2、Al 2O 3、TiO 2等)。舉例來說，第一材料層135a可為MgF 2，折射率為1.38；第二材料層135b可為TiO 3，折射率為2.04。 1 , the material of the light guide plate 131 may include polycarbonate (PC), polyacrylic acid (PMMA) or other suitable materials. The material of the coating layer 133 and the coating layer 134 may include suitable resin materials or inorganic compounds, wherein the inorganic compound has better water vapor barrier capability, such as metal oxides (e.g., Al 2 O 3 /Ti 3 O 5 ), silicon dioxide (SiO 2 ), silicon nitride (e.g., SiNx) and metal nitride (e.g., TiN), etc. In some embodiments, the thickness of the coating layer 133 and the coating layer 134 is more than 200 nm. In some embodiments, the difference between the thermal expansion coefficient of the coating layer 133 (or the coating layer 134) and the thermal expansion coefficient of the light guide plate 131 is less than a critical value to avoid cracking due to thermal expansion. For example, the material of the light guide plate 131 includes polycarbonate, and the thermal expansion coefficient is 6.8 x 10-5/°C, while the material of the coating layer 133 (or the coating layer 134) includes silicon dioxide, and the thermal expansion coefficient is 5.0 x 10-5 /°C. The difference between the two is about 1.8 x 10-5 /°C, so the critical value must be greater than 1.8 x 10-5/°C to resist thermal deformation. In some embodiments, the coating layer 133 and the coating layer 134 also include more than one layer of stacked materials. For example, the coating layer 133 (or the coating layer 134) includes two layers of thin film hardening materials, and the first layer of thin film hardening material of the coating layer 133 (or the coating layer 134) is silicon dioxide (refractive index = 1.46, thermal expansion coefficient = 5.0 x 10-5 /℃). The second thin film hardening material is stacked on the first layer of thin film hardening material of the coating layer 133 (or the coating layer 134), for example, NaF (refractive index = 1.3, thermal expansion coefficient = 3.9 x 10-5 /℃). In addition, the first material layer 135a and the second material layer 135b may include metal compounds (such as MgF2 , NdF3 , CeF3 , etc.) and oxides (such as SiO2 , Al2O3 , TiO2 , etc.). For example, the first material layer 135a may be MgF2 with a refractive index of 1.38; the second material layer 135b may be TiO3 with a refractive index of 2.04.

在圖1的實施例中微結構132是形成在第二表面131b，但在其他實施例中也可以形成在第一表面131a或兩個表面上都有。舉例來說，在圖3的實施例中，微結構301形成在導光板131的第一表面131a上。微結構301的頂點302同時遠離第一表面131a與第二表面131b，鍍膜層134設置於第一表面131a，鍍膜層134會覆蓋微結構301，且會覆蓋微結構301的頂點302。另外，在其他實施例中鍍膜層134的厚度t例如可以大於頂點302相對於第一表面131a的高度，但不以此為限。在圖4的實施例中，微結構301設置在第一表面131a，同時微結構132設置在第二表面131b。鍍膜層134會覆蓋微結構301，而鍍膜層133會覆蓋微結構132。圖3與圖4中微結構301與微結構132的截面形狀僅是範例，本揭露並不限制微結構301與微結構132的形狀與分佈。例如，類似於微結構132，微結構301也可以是沿著某一方向延伸，或是分佈在二維平面上。又例如，微結構301之間可具有一預設的間隙，此預設間隙可依使用者的需求改變來調整微結構301以較密或較疏的方式來分佈。在一些實施例中，微結構301在二維平面上可以有分布密度不同的區域，例如在二維平面的中心有密度較高的區域，而中心周圍有密度較低的區域。In the embodiment of FIG. 1 , the microstructure 132 is formed on the second surface 131b, but in other embodiments, it may be formed on the first surface 131a or on both surfaces. For example, in the embodiment of FIG. 3 , the microstructure 301 is formed on the first surface 131a of the light guide plate 131. The vertex 302 of the microstructure 301 is away from both the first surface 131a and the second surface 131b, and the coating layer 134 is disposed on the first surface 131a. The coating layer 134 covers the microstructure 301 and the vertex 302 of the microstructure 301. In addition, in other embodiments, the thickness t of the coating layer 134 may be, for example, greater than the height of the vertex 302 relative to the first surface 131a, but is not limited thereto. In the embodiment of FIG. 4 , the microstructure 301 is disposed on the first surface 131a, and the microstructure 132 is disposed on the second surface 131b. The coating layer 134 covers the microstructure 301, and the coating layer 133 covers the microstructure 132. The cross-sectional shapes of the microstructure 301 and the microstructure 132 in FIG. 3 and FIG. 4 are merely examples, and the present disclosure does not limit the shapes and distributions of the microstructure 301 and the microstructure 132. For example, similar to the microstructure 132, the microstructure 301 may also extend in a certain direction, or be distributed on a two-dimensional plane. For another example, there may be a preset gap between the microstructures 301, and this preset gap may be changed according to the needs of the user to adjust the microstructure 301 to be distributed in a denser or sparser manner. In some embodiments, the microstructure 301 may have regions with different distribution densities on a two-dimensional plane, for example, a region with higher density at the center of the two-dimensional plane and a region with lower density around the center.

在上述圖1、圖3與圖4的實施例中，光學調控層135是設置在顯示裝置100的最外側以做為顯示裝置100的外觀元件，也就是說不需要額外設置保護蓋板(cover lens)。鍍膜層134的功能包括提高導光組件表面硬度、使微結構抗刮、阻絕水氣與氧氣、避免導光板翹曲等。然而，在其他實施例中也可以額外設置保護蓋板，如圖5至圖7所示，顯示裝置還包含保護蓋板501，保護蓋板501設置在光學調控層135之上，保護蓋板501與光學調控層135之間可以設置貼合膠502。In the embodiments of FIG. 1 , FIG. 3 , and FIG. 4 , the optical control layer 135 is disposed on the outermost side of the display device 100 as an appearance element of the display device 100 , that is, there is no need to additionally provide a protective cover lens. The functions of the coating layer 134 include increasing the surface hardness of the light guide component, making the microstructure scratch-resistant, blocking moisture and oxygen, and preventing the light guide plate from warping. However, in other embodiments, an additional protective cover may be provided. As shown in FIG. 5 to FIG. 7 , the display device further includes a protective cover 501, which is disposed on the optical control layer 135 , and a bonding adhesive 502 may be provided between the protective cover 501 and the optical control layer 135 .

圖8是根據一些實施例繪示微結構132的側視示意圖。在本發明之實施例中，微結構132的外型除了可為前述的半圓形之外，亦可為三角形、橢圓形或梯形，其中最右側之微結構截面外型係以梯形作基底，而其上為弧形。另外，為了提升導光板131的光學效能，可在半圓形的微結構132上，再形成十字形或米字型刻痕。FIG8 is a schematic side view of a microstructure 132 according to some embodiments. In the embodiments of the present invention, the microstructure 132 may be in a triangular, elliptical or trapezoidal shape in addition to the aforementioned semicircular shape, wherein the cross-sectional shape of the microstructure on the far right is a trapezoidal base with an arc on top. In addition, in order to improve the optical performance of the light guide plate 131, a cross-shaped or criss-cross-shaped notch may be formed on the semicircular microstructure 132.

類似地，圖8所繪示之微結構的外型也可應用於微結構301。具體而言，在本發明之實施例中，微結構301的外型除了可為前述的三角形之外，亦可為半圓形、橢圓形或梯形。在一些實施例中，微結構132與微結構301可利用，例如黃光微影、X光微影、雷射蝕刻或網印等相關技術來形成於導光板131上。Similarly, the shape of the microstructure shown in FIG. 8 can also be applied to the microstructure 301. Specifically, in the embodiment of the present invention, the shape of the microstructure 301 can be a semicircle, an ellipse or a trapezoid in addition to the aforementioned triangle. In some embodiments, the microstructure 132 and the microstructure 301 can be formed on the light guide plate 131 using related technologies such as yellow light lithography, X-ray lithography, laser etching or screen printing.

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 by the embodiments, they are not intended to limit the present invention. Any person with ordinary knowledge in the relevant technical field can make some changes and modifications without departing from the spirit and scope of the present invention. Therefore, the protection scope of the present invention shall be defined by the scope of the attached patent application.

100:顯示裝置 110:反射式顯示面板 111:顯示側 112:背側 120:發光元件 130:導光組件 131:導光板 131a:第一表面 131b:第二表面 131c:第三表面 132:微結構 133:鍍膜層 134:鍍膜層 135a:第一材料層 135b:第二材料層 135:光學調控層 141:頂點 t:厚度 210:出光面 301:微結構 302:頂點 501:保護蓋板 502:貼合膠 100: display device 110: reflective display panel 111: display side 112: back side 120: light-emitting element 130: light guide assembly 131: light guide plate 131a: first surface 131b: second surface 131c: third surface 132: microstructure 133: coating layer 134: coating layer 135a: first material layer 135b: second material layer 135: optical control layer 141: vertex t: thickness 210: light-emitting surface 301: microstructure 302: vertex 501: protective cover 502: adhesive bonding

圖1是根據一實施例繪示顯示裝置的示意圖。 圖2是根據一實施例繪示光學調控層與導光板的光路示意圖。 圖3是根據一實施例繪示顯示裝置的示意圖。 圖4是根據一實施例繪示顯示裝置的示意圖。 圖5至圖7是根據一實施例繪示顯示裝置具有保護蓋板的示意圖。 圖8是根據一些實施例繪示微結構132的側視示意圖。 FIG. 1 is a schematic diagram of a display device according to an embodiment. FIG. 2 is a schematic diagram of a light path of an optical control layer and a light guide plate according to an embodiment. FIG. 3 is a schematic diagram of a display device according to an embodiment. FIG. 4 is a schematic diagram of a display device according to an embodiment. FIG. 5 to FIG. 7 are schematic diagrams of a display device with a protective cover according to an embodiment. FIG. 8 is a schematic diagram of a side view of a microstructure 132 according to some embodiments.

100:顯示裝置 110:反射式顯示面板 111:顯示側 112:背側 120:發光元件 130:導光組件 131:導光板 131a:第一表面 131b:第二表面 131c:第三表面 132:微結構 133:鍍膜層 134:鍍膜層 135a:第一材料層 135b:第二材料層 135:光學調控層 141:頂點 t:厚度 100: display device 110: reflective display panel 111: display side 112: back side 120: light-emitting element 130: light guide assembly 131: light guide plate 131a: first surface 131b: second surface 131c: third surface 132: microstructure 133: coating layer 134: coating layer 135a: first material layer 135b: second material layer 135: optical control layer 141: vertex t: thickness

Claims (9)

一種導光組件，包括：一導光板，具有彼此背離的一第一表面與一第二表面，該第一表面與該第二表面的其中之一上具有微結構，其中該微結構具有同時背離該第一表面與該第二表面的頂點；一第一鍍膜層，設置於該導光板的該第一表面；一第二鍍膜層，設置於該導光板的該第二表面；以及一光學調控層，設置於該第一鍍膜層之上，其中該第一鍍膜層設置在該導光板與該光學調控層之間，該光學調控層包含彼此交互堆疊的至少一第一材料層與至少一第二材料層，其中該至少一第一材料層的折射率與該至少一第二材料層的折射率不相同，該至少一第二材料層設置於該至少一第一材料層與該第一鍍膜層之間，該至少一第二材料層的該折射率大於該至少一第一鍍膜層的該折射率。 A light guide assembly includes: a light guide plate having a first surface and a second surface facing away from each other, one of the first surface and the second surface having a microstructure, wherein the microstructure has a vertex facing away from both the first surface and the second surface; a first coating layer disposed on the first surface of the light guide plate; a second coating layer disposed on the second surface of the light guide plate; and an optical control layer disposed on the first coating layer, wherein the microstructure has a vertex facing away from both the first surface and the second surface; The first coating layer is disposed between the light guide plate and the optical control layer. The optical control layer includes at least one first material layer and at least one second material layer alternately stacked with each other, wherein the refractive index of the at least one first material layer is different from the refractive index of the at least one second material layer. The at least one second material layer is disposed between the at least one first material layer and the first coating layer, and the refractive index of the at least one second material layer is greater than the refractive index of the at least one first coating layer. 如請求項1所述之導光組件，其中該微結構設置於該第一表面上，該第一鍍膜層的厚度大於該頂點的高度。 A light-guiding component as described in claim 1, wherein the microstructure is disposed on the first surface, and the thickness of the first coating layer is greater than the height of the vertex. 如請求項1所述之導光組件，其中該微結構設置於該第二表面上，該第二鍍膜層的厚度大於該頂點的高度。 A light-guiding component as described in claim 1, wherein the microstructure is disposed on the second surface, and the thickness of the second coating layer is greater than the height of the vertex. 如請求項1所述之導光組件，其中該至少一第一材料層的該折射率小於該至少一第二材料層的該折射率。 The light-guiding component as described in claim 1, wherein the refractive index of the at least one first material layer is less than the refractive index of the at least one second material layer. 如請求項1所述之導光組件，其中該至少一第一材料層的該折射率小於該至少一第二材料層的該折射率，該至少一第二材料層的其中之一接觸該第一鍍膜層，該至少一第一材料層的其中之一形成出光面。 The light-guiding component as described in claim 1, wherein the refractive index of the at least one first material layer is less than the refractive index of the at least one second material layer, one of the at least one second material layer contacts the first coating layer, and one of the at least one first material layer forms a light-emitting surface. 如請求項1所述之導光組件，其中該光學調控層的厚度為1/4λ的整數倍，且該至少一第一材料層與該至少一第二材料層交錯堆疊的層數為偶數倍，其中λ為目標波長。 The light-guiding component as described in claim 1, wherein the thickness of the optical control layer is an integer multiple of 1/4λ, and the number of layers of the at least one first material layer and the at least one second material layer stacked alternately is an even multiple, wherein λ is the target wavelength. 一種顯示裝置，包括：一反射式顯示面板，具有彼此背離的一顯示側與一背側；一導光組件，設置在該反射式顯示面板的該顯示側，該導光組件包括：一導光板，具有彼此背離的一第一表面與一第二表面，其中該第二表面相對該反射式顯示面板，該第一表面與該第二表面的其中之一上具有微結構；一第一鍍膜層，設置於該導光板的該第一表面；一第二鍍膜層，設置於該導光板的該第二表面；以及 一光學調控層，設置於該第一鍍膜層之上，其中該第一鍍膜層設置在該導光板與該光學調控層之間，該光學調控層包含彼此交互堆疊的至少一第一材料層與至少一第二材料層，其中該至少一第一材料層的折射率與該至少一第二材料層的折射率不相同，其中該至少一第二材料層設置於該至少一第一材料層與該第一鍍膜層之間，該至少一第二材料層的該折射率大於該至少一第一鍍膜層的該折射率。 A display device includes: a reflective display panel having a display side and a back side facing away from each other; a light guide assembly disposed on the display side of the reflective display panel, the light guide assembly including: a light guide plate having a first surface and a second surface facing away from each other, wherein the second surface is opposite to the reflective display panel, and one of the first surface and the second surface has a microstructure; a first coating layer disposed on the first surface of the light guide plate; a second coating layer disposed on the second surface of the light guide plate; and An optical control layer is disposed on the first coating layer, wherein the first coating layer is disposed between the light guide plate and the optical control layer, and the optical control layer comprises at least one first material layer and at least one second material layer alternately stacked with each other, wherein the refractive index of the at least one first material layer is different from the refractive index of the at least one second material layer, wherein the at least one second material layer is disposed between the at least one first material layer and the first coating layer, and the refractive index of the at least one second material layer is greater than the refractive index of the at least one first coating layer. 如請求項7所述之顯示裝置，還包括至少一發光元件，設置在該導光板的第三表面，該第三表面連接該第一表面與該第二表面。 The display device as described in claim 7 further includes at least one light-emitting element disposed on the third surface of the light guide plate, the third surface connecting the first surface and the second surface. 如請求項7所述之顯示裝置，其中該光學調控層設置於該顯示裝置的最外側以做為該顯示裝置的外觀元件。 A display device as described in claim 7, wherein the optical control layer is disposed on the outermost side of the display device to serve as an appearance element of the display device.
TW112117100A 2022-09-23 2023-05-09 Light guide assembly and display device TWI847681B (en)

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Publication number Priority date Publication date Assignee Title
JP2003149642A (en) 2001-11-13 2003-05-21 Matsushita Electric Works Ltd Front light for liquid crystal

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2003149642A (en) 2001-11-13 2003-05-21 Matsushita Electric Works Ltd Front light for liquid crystal

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