TW201800780A - Polarizer and display device using the same - Google Patents
Polarizer and display device using the same Download PDFInfo
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Classifications
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B5/00—Optical elements other than lenses
- G02B5/30—Polarising elements
- G02B5/3025—Polarisers, i.e. arrangements capable of producing a definite output polarisation state from an unpolarised input state
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K59/00—Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
- H10K59/10—OLED displays
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K59/00—Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
- H10K59/40—OLEDs integrated with touch screens
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- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Polarising Elements (AREA)
Abstract
Description
本發明是關於一種偏光板及應用其之顯示器裝置。本發明特別是關於一種包括光擴散層之偏光板及應用此種偏光板之顯示器裝置。The invention relates to a polarizing plate and a display device using the same. The present invention particularly relates to a polarizing plate including a light diffusion layer and a display device using the polarizing plate.
顯示器裝置可能會因為各種原因而有在不同視角發生色偏的情況。以有機發光二極體(OLED)顯示器裝置為例，其通常包括OLED面板以及配置在其上的偏光板，利用圓偏振光可降低OLED面板的反射率，降低OLED面板的暗態亮度，以提高對比。Display devices may have color shifts at different viewing angles for various reasons. Taking an organic light emitting diode (OLED) display device as an example, it usually includes an OLED panel and a polarizing plate disposed thereon. The use of circularly polarized light can reduce the reflectivity of the OLED panel and reduce the dark state brightness of the OLED panel to improve Compared.
OLED顯示器裝置的色偏現象可能是由其中的材料和/或微共振腔(micro-cavity)的設計所導致。特別是，由於微共振腔長度和共振模態的差異，可能會發生共振光頻譜的藍移。事實上，紅色光、綠色光、藍色光都會發生相當程度的偏移，導致在正視角和側視角觀察到的發光波長有所差異，發生色偏現象。這對顯示畫面的視覺效果有不良影響。The color shift phenomenon of the OLED display device may be caused by the materials therein and / or the design of the micro-cavity. In particular, due to the difference in the length of the microcavity cavity and the resonance mode, a blue shift of the resonance light spectrum may occur. In fact, the red light, green light, and blue light will all shift to a certain extent, resulting in differences in the emission wavelengths observed at the positive and side viewing angles, and the phenomenon of color shift. This has an adverse effect on the visual effect of the display.
本發明中，藉由調整偏光板的設計，在其中加入光擴散層，可改善顯示器裝置的色偏情況，進而提升顯示器裝置的畫面品質。In the present invention, by adjusting the design of the polarizing plate and adding a light diffusion layer therein, the color shift of the display device can be improved, and the picture quality of the display device can be improved.
根據一些實施例，提供一種偏光板。此種偏光板包括一第一保護層、一偏光基體層、一第二保護層和一第一光擴散層。偏光基體層配置於第一保護層上。第二保護層配置於偏光基體層上。第一光擴散層配置於第二保護層上。第一光擴散層包括一膠材和分佈於該膠材中的複數第一擴散粒子。第一光擴散層具有一第一霧度(haze)介於10%和80%之間。According to some embodiments, a polarizing plate is provided. Such a polarizing plate includes a first protective layer, a polarizing base layer, a second protective layer, and a first light diffusion layer. The polarizing base layer is disposed on the first protective layer. The second protective layer is disposed on the polarizing substrate layer. The first light diffusion layer is disposed on the second protective layer. The first light diffusion layer includes a glue material and a plurality of first diffusion particles distributed in the glue material. The first light diffusion layer has a first haze between 10% and 80%.
根據一些實施例，提供一種顯示器裝置。此種顯示器裝置包括一顯示器面板和一根據實施例之偏光板(例如前段所述者)，偏光板配置於顯示器面板上。According to some embodiments, a display device is provided. This display device includes a display panel and a polarizing plate (such as the one described in the previous paragraph) according to the embodiment, and the polarizing plate is disposed on the display panel.
為了對本發明之上述及其他方面有更佳的瞭解，下文特舉較佳實施例，並配合所附圖式，作詳細說明如下：In order to have a better understanding of the above and other aspects of the present invention, preferred embodiments are described below in detail with the accompanying drawings, as follows:
請參照第1A圖，其繪示一種根據本發明實施例的偏光板100A。偏光板100A包括一第一保護層102、一偏光基體層104、一第二保護層106和一第一光擴散層108。偏光基體層104配置於第一保護層102上。第二保護層106配置於偏光基體層104上。第一光擴散層108配置於第二保護層106上。第一光擴散層108包括一膠材110和分佈於膠材110中的複數第一擴散粒子112。Please refer to FIG. 1A, which illustrates a polarizing plate 100A according to an embodiment of the present invention. The polarizing plate 100A includes a first protective layer 102, a polarizing base layer 104, a second protective layer 106, and a first light diffusion layer 108. The polarizing base layer 104 is disposed on the first protective layer 102. The second protective layer 106 is disposed on the polarizing base layer 104. The first light diffusion layer 108 is disposed on the second protective layer 106. The first light diffusion layer 108 includes a glue material 110 and a plurality of first diffusion particles 112 distributed in the glue material 110.
在一些實施例中，第一光擴散層108具有一第一霧度介於10%和80%之間、或第一霧度介於10%和70%之間、或第一霧度介於10%和60%之間、或第一霧度介於10%和50%之間、或第一霧度介於10%和40%之間、或第一霧度介於10%和30%之間、或第一霧度介於10%和20%之間。In some embodiments, the first light diffusion layer 108 has a first haze between 10% and 80%, or a first haze between 10% and 70%, or a first haze between Between 10% and 60%, or first haze between 10% and 50%, or first haze between 10% and 40%, or first haze between 10% and 30% Between, or the first haze is between 10% and 20%.
根據一些實施例，偏光基體層104和提供其機械支撐的第一保護層102、第二保護層106，可由相同於一般偏光板所用材料的材料，以製造一般偏光板的方法製成。具體來說，偏光基體層104可為聚乙烯醇(PVA)樹脂膜，其可藉由皂化聚醋酸乙烯樹脂製得。聚醋酸乙烯樹脂的例子包括醋酸乙烯之單聚合物(即聚醋酸乙烯)，以及醋酸乙烯之共聚合物和其他能與醋酸乙烯進行共聚合之單體。其他能與醋酸乙烯進行共聚合之單體的例子包括不飽和羧酸(例如丙烯酸、甲基丙烯酸、丙烯酸乙酯、正丙烯酸丙酯、甲基丙烯酸甲酯)、烯烴(例如乙烯、丙烯、1-丁烯、2-甲丙烯)、乙烯醚(例如乙基乙烯醚、甲基乙烯醚、正丙基乙烯醚、異丙基乙烯醚)、不飽和磺酸(例如乙烯基磺酸、乙烯基磺酸鈉)等等。第一保護層102、第二保護層106可由對苯二甲酸乙二酯(PET)、三聚醋酸纖維素(TAC)、聚甲基丙烯酸甲酯(PMMA)、環烯烴聚合物(COP)、丙烯酸樹脂、聚芳香羥樹脂、聚醚樹脂、環聚烯烴樹脂(例如聚冰片烯樹脂)或聚丙烯(PP)製成。要注意的是，於本文中，當條列某一元件可由某些材料製成時，並不排除使用該些材料其中複數者、或該些材料其中一或多者並配合其他材料的情況。According to some embodiments, the polarizing base layer 104 and the first protective layer 102 and the second protective layer 106 that provide mechanical support thereof may be made of a material that is the same as a material used for a general polarizing plate by a method for manufacturing a general polarizing plate. Specifically, the polarizing base layer 104 may be a polyvinyl alcohol (PVA) resin film, which may be made by saponifying a polyvinyl acetate resin. Examples of the polyvinyl acetate resin include a single polymer of vinyl acetate (ie, polyvinyl acetate), a copolymer of vinyl acetate, and other monomers capable of copolymerizing with vinyl acetate. Examples of other monomers copolymerizable with vinyl acetate include unsaturated carboxylic acids (e.g. acrylic acid, methacrylic acid, ethyl acrylate, propyl n-acrylate, methyl methacrylate), olefins (e.g. ethylene, propylene, 1 -Butene, 2-methylpropene), vinyl ethers (e.g. ethyl vinyl ether, methyl vinyl ether, n-propyl vinyl ether, isopropyl vinyl ether), unsaturated sulfonic acids (e.g. vinyl sulfonic acid, vinyl Sodium sulfonate) and so on. The first protective layer 102 and the second protective layer 106 can be made of ethylene terephthalate (PET), cellulose triacetate (TAC), polymethyl methacrylate (PMMA), cycloolefin polymer (COP), Made of acrylic resin, polyaromatic hydroxy resin, polyether resin, cyclic polyolefin resin (such as polynorbornene resin) or polypropylene (PP). It should be noted that, when a component is listed in this article, it can be made of certain materials, it does not exclude the use of a plurality of these materials, or one or more of these materials, and other materials.
根據一些實施例，第一光擴散層108可經由膠材110塗佈在第二保護層106上，其中第一擴散粒子112係以塗佈或添加於膠材之方式，使之摻入並隨機分佈於膠材110之中來形成。According to some embodiments, the first light diffusion layer 108 may be coated on the second protective layer 106 through the adhesive material 110, wherein the first diffusion particles 112 are coated or added to the adhesive material to be incorporated and randomly Formed in the glue material 110.
在一些實施例中，膠材110由壓克力膠、矽膠、紫外線固化膠(例如紫外線硬化型樹脂)或熱固化膠(例如熱硬化型樹脂)等形成。在一些實施例中，膠材110係為由丙烯酸樹酯形成之感壓膠 (Pressure Sensitive Adhesive，PSA)。In some embodiments, the adhesive material 110 is formed of acrylic glue, silicone glue, ultraviolet curable glue (such as ultraviolet curable resin), or thermal curable glue (such as thermosetting resin). In some embodiments, the adhesive 110 is a pressure sensitive adhesive (PSA) made of acrylic resin.
在一些實施例中，第一擴散粒子112由樹脂、壓克力或聚苯乙烯製成。In some embodiments, the first diffusion particles 112 are made of resin, acrylic, or polystyrene.
在一些實施例中，第一擴散粒子112於膠材110中所占體積填充率為10%以上。在一些實施例中，第一擴散粒子112係均勻分布於膠材110中。In some embodiments, the volume filling ratio of the first diffusion particles 112 in the adhesive material 110 is more than 10%. In some embodiments, the first diffusion particles 112 are uniformly distributed in the glue material 110.
在一些實施例中，當膠材110為紫外線硬化型樹脂或熱硬化型樹脂時，可藉由多次製程，使第一擴散粒子112於膠材110之不同區域中的體積填充率不同。藉此，可更進一步調整面板在不同區域所需要之光擴散程度。In some embodiments, when the adhesive material 110 is a UV-curable resin or a thermosetting resin, the volume filling rate of the first diffusion particles 112 in different regions of the adhesive material 110 can be different through multiple processes. This can further adjust the degree of light diffusion required by the panel in different areas.
根據一些實施例，膠材110具有一第一折射率，第一擴散粒子112具有一第二折射率，且第一折射率不等於第二折射率。利用折射率的差異，可增加光擴散能力。更進一步地，在一些實施例中，第一折射率介於1.3和1.5之間，第二折射率介於1.4和1.55之間。According to some embodiments, the glue material 110 has a first refractive index, the first diffusion particles 112 have a second refractive index, and the first refractive index is not equal to the second refractive index. The difference in refractive index can increase the light diffusion ability. Furthermore, in some embodiments, the first refractive index is between 1.3 and 1.5, and the second refractive index is between 1.4 and 1.55.
在一些實施例中，第一光擴散層108具有一厚度t1，厚度t1小於等於30微米，例如是介於1微米和30微米之間，特別例如是介於5微米和25微米之間。厚度t1和第一霧度實質上具有正相關性，厚度t1越大，則第一霧度越大。在一些實施例中，第一擴散粒子112可具有一尺寸，例如直徑，小於等於10微米。要注意的是，於本文中，複數第一擴散粒子112彼此之間可具有一或多個相同特徵，但不須受限於要完全一致，只要符合所需條件即可。In some embodiments, the first light diffusion layer 108 has a thickness t1, and the thickness t1 is less than or equal to 30 micrometers, such as between 1 micrometer and 30 micrometers, and in particular, between 5 micrometers and 25 micrometers. The thickness t1 and the first haze have a substantially positive correlation. The larger the thickness t1, the larger the first haze. In some embodiments, the first diffusion particles 112 may have a size, such as a diameter, of less than or equal to 10 microns. It should be noted that, in this document, the plurality of first diffusion particles 112 may have one or more of the same characteristics with each other, but it is not limited to be completely consistent as long as the required conditions are met.
根據一些實施例，偏光板100A還可包括一第三保護層114。第三保護層114配置於第一光擴散層108上。第三保護層114可實質上相同於第一保護層102和/或第二保護層106，但不受限於此。根據一些實施例，第三保護層114可由聚對苯二甲酸乙二酯(PET)、三聚醋酸纖維素(TAC)、聚甲基丙烯酸甲酯(PMMA)或環烯烴聚合物(COP)製成。在一些實施例中，第三保護層114具有一位相差值Re介於0和150奈米之間。在一些實施例中，第三保護層114之一慢軸和偏光基體層104之一吸收軸的夾角介於0度和50度之間。According to some embodiments, the polarizing plate 100A may further include a third protective layer 114. The third protective layer 114 is disposed on the first light diffusion layer 108. The third protective layer 114 may be substantially the same as the first protective layer 102 and / or the second protective layer 106, but is not limited thereto. According to some embodiments, the third protective layer 114 may be made of polyethylene terephthalate (PET), cellulose triacetate (TAC), polymethyl methacrylate (PMMA), or cycloolefin polymer (COP). to make. In some embodiments, the third protective layer 114 has a one-bit phase difference Re between 0 and 150 nanometers. In some embodiments, the angle between the slow axis of the third protective layer 114 and the absorption axis of one of the polarizing base layers 104 is between 0 degrees and 50 degrees.
依照使用需求，偏光板100A還可包括一或多層其他的層。舉例來說，根據一些實施例，偏光板100A還可包括一黏著層(未示於此)和一離型層(未示於此)，依序配置在第一保護層102相對於偏光基體層104的另一側。此一黏著層例如可由感壓膠形成，用於接合顯示器面板。According to use requirements, the polarizing plate 100A may further include one or more other layers. For example, according to some embodiments, the polarizing plate 100A may further include an adhesive layer (not shown here) and a release layer (not shown here), which are sequentially disposed on the first protective layer 102 relative to the polarizing base layer. 104 on the other side. Such an adhesive layer may be formed of, for example, a pressure-sensitive adhesive for bonding a display panel.
請參照第1B圖，其繪示另一種根據本發明實施例的偏光板100B。偏光板100B和偏光板100A的差異在於，偏光板100B更包括一第二光擴散層116。第二光擴散層116配置於第三保護層114上。第二光擴散層116包括複數第二擴散粒子118。第二光擴散層116具有一第二霧度介於10%和80%之間。Please refer to FIG. 1B, which illustrates another polarizing plate 100B according to an embodiment of the present invention. The difference between the polarizing plate 100B and the polarizing plate 100A is that the polarizing plate 100B further includes a second light diffusion layer 116. The second light diffusion layer 116 is disposed on the third protective layer 114. The second light diffusion layer 116 includes a plurality of second diffusion particles 118. The second light diffusion layer 116 has a second haze between 10% and 80%.
根據一些實施例，第二光擴散層116可藉由將第二擴散粒子118塗佈到第三保護層114上來形成，例如可將第二擴散粒子118以濺鍍方式塗佈到第三保護層114上。具體來說，可先將第二擴散粒子118塗佈至第三保護層114上形成第二光擴散層116，再將第三保護層114接合到第一光擴散層108上。According to some embodiments, the second light diffusion layer 116 may be formed by coating the second diffusion particles 118 on the third protection layer 114, for example, the second diffusion particles 118 may be applied on the third protection layer by sputtering. 114 on. Specifically, the second light diffusion layer 118 may be coated on the third protection layer 114 to form a second light diffusion layer 116, and then the third protection layer 114 may be bonded to the first light diffusion layer 108.
在一些實施例中，第二擴散粒子118由樹脂、壓克力或聚苯乙烯製成。在一些實施例中，第二擴散粒子118可具有一尺寸，例如直徑，小於等於10微米。要注意的是，於本文中，複數第二擴散粒子118彼此之間可具有一或多個相同特徵，但不須受限於要完全一致，只要符合所需條件即可。在一些實施例中，第一擴散粒子112和第二擴散粒子118實質上相同。In some embodiments, the second diffusion particles 118 are made of resin, acrylic, or polystyrene. In some embodiments, the second diffusion particles 118 may have a size, such as a diameter, of 10 micrometers or less. It should be noted that, herein, the plurality of second diffusion particles 118 may have one or more of the same characteristics with each other, but it is not limited to be completely consistent, as long as the required conditions are met. In some embodiments, the first diffusion particles 112 and the second diffusion particles 118 are substantially the same.
根據本發明實施例的偏光板特別適用於顯示器裝置中。具體來說，顯示器裝置可包括一顯示器面板和根據前述任一實施例之偏光板，該偏光板配置於顯示器面板上。在一些實施例中，顯示器面板為OLED面板。不過，本發明並不受限於此，可應用在任何偏光板配置在顯示器面板的出光側，而需要調整色差的情況。在一些實施例中，顯示器裝置還可包括一蓋板，配置於偏光板上。在一些進一步的實施例中，顯示器裝置還可包括一觸控面板，配置於偏光板上。第2A、2B圖繪示根據實施例之顯示器裝置。第2A圖所繪示的顯示器裝置200A係採用偏光板100A，其配置在顯示器面板202上，在一實施例中，顯示器面板202係為一OLED面板。顯示器裝置200A還包括蓋板或觸控面板204，藉由黏著層206接合至偏光板100A上。黏著層206例如是由光學膠(OCA)或光學透明樹脂(OCR)形成。第2B圖所繪示的顯示器裝置200B和顯示器裝置200A的差異在於，顯示器裝置200B係採用偏光板100B。The polarizing plate according to the embodiment of the present invention is particularly suitable for use in a display device. Specifically, the display device may include a display panel and the polarizing plate according to any one of the foregoing embodiments, and the polarizing plate is disposed on the display panel. In some embodiments, the display panel is an OLED panel. However, the present invention is not limited to this, and can be applied to the case where any polarizing plate is arranged on the light-exiting side of the display panel, and the chromatic aberration needs to be adjusted. In some embodiments, the display device may further include a cover plate disposed on the polarizing plate. In some further embodiments, the display device may further include a touch panel configured on the polarizing plate. 2A and 2B illustrate a display device according to an embodiment. The display device 200A shown in FIG. 2A uses a polarizing plate 100A, which is disposed on the display panel 202. In one embodiment, the display panel 202 is an OLED panel. The display device 200A further includes a cover plate or a touch panel 204 which is bonded to the polarizing plate 100A through an adhesive layer 206. The adhesive layer 206 is formed of, for example, an optical adhesive (OCA) or an optically transparent resin (OCR). The difference between the display device 200B and the display device 200A shown in FIG. 2B is that the display device 200B uses a polarizing plate 100B.
綜上所述，由於加入了光擴散層，因此偏光板可用於改善顯示器裝置的色偏情況。更具體地說，擴散粒子對顯示器面板的光進行折射、散射等等，使光混和而令光形進行重新分布，藉此降低正視/側視的色偏現象。再者，還可避免因為接合蓋板或觸控面板而導致的表面處理失效。In summary, since a light diffusing layer is added, the polarizing plate can be used to improve the color deviation of the display device. More specifically, the diffused particles refract, scatter, etc. the light of the display panel, mix the light and redistribute the light shape, thereby reducing the color shift phenomenon of the front view / side view. Furthermore, it is possible to avoid surface treatment failures caused by bonding a cover plate or a touch panel.
以下提供具有偏光板100A之結構且其中第一霧度分別為25%、60%的實驗例、和不具有如本發明之光擴散層的傳統偏光板的對照例，其色偏情況的測試結果，如表1所列。可以看出，使用根據本發明實施例的偏光板，能夠對於色偏情況有所改善。 表1
雖然本發明已以較佳實施例揭露如上，然其並非用以限定本發明。本發明所屬技術領域中具有通常知識者，在不脫離本發明之精神和範圍內，當可作各種之更動與潤飾。因此，本發明之保護範圍當視後附之申請專利範圍所界定者為準。Although the present invention has been disclosed as above with preferred embodiments, it is not intended to limit the present invention. Those with ordinary knowledge in the technical field to which the present invention pertains can make various changes and modifications without departing from the spirit and scope of the present invention. Therefore, the protection scope of the present invention shall be determined by the scope of the attached patent application.
100A、100B‧‧‧偏光板
102‧‧‧第一保護層
104‧‧‧偏光基體層
106‧‧‧第二保護層
108‧‧‧第一光擴散層
110‧‧‧膠材
112‧‧‧第一擴散粒子
114‧‧‧第三保護層
116‧‧‧第二光擴散層
118‧‧‧第二擴散粒子
200A、200B‧‧‧顯示器裝置
202‧‧‧顯示器面板
204‧‧‧蓋板或觸控面板
206‧‧‧黏著層
t1‧‧‧厚度100A, 100B‧‧‧polarizing plate
102‧‧‧first protective layer
104‧‧‧Polarized base layer
106‧‧‧Second protective layer
108‧‧‧first light diffusion layer
110‧‧‧ glue
112‧‧‧ first diffusion particle
114‧‧‧ third protective layer
116‧‧‧Second light diffusion layer
118‧‧‧ second diffusion particle
200A, 200B‧‧‧ Display device
202‧‧‧Display Panel
204‧‧‧ Cover or touch panel
206‧‧‧Adhesive layer
t1‧‧‧thickness
第1A、1B圖為根據實施例之偏光板的示意圖。 第2A、2B圖為根據實施例之顯示器裝置的示意圖。1A and 1B are schematic diagrams of a polarizing plate according to an embodiment. 2A and 2B are schematic diagrams of a display device according to an embodiment.
100A‧‧‧偏光板 100A‧‧‧polarizing plate
102‧‧‧第一保護層 102‧‧‧first protective layer
104‧‧‧偏光基體層 104‧‧‧Polarized base layer
106‧‧‧第二保護層 106‧‧‧Second protective layer
108‧‧‧第一光擴散層 108‧‧‧first light diffusion layer
110‧‧‧膠材 110‧‧‧ glue
112‧‧‧第一擴散粒子 112‧‧‧ first diffusion particle
114‧‧‧第三保護層 114‧‧‧ third protective layer
Claims (13)
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| CN108490671B (en) * | 2018-02-06 | 2020-11-24 | 昆山龙腾光电股份有限公司 | Liquid crystal display device with a light guide plate |
| CN108898944A (en) * | 2018-06-29 | 2018-11-27 | 联想(北京)有限公司 | A kind of electronic equipment and preparation method thereof |
| CN113015934B (en) * | 2019-08-29 | 2024-01-05 | 京东方科技集团股份有限公司 | Polarizer, display panel and display device |
| CN114114499B (en) * | 2020-08-31 | 2024-07-19 | 宁波激智科技股份有限公司 | Polarization-maintaining optical film, polarization-maintaining diffusion film and double-sided fog polarization-maintaining diffusion film |
| CN112285971A (en) * | 2020-10-23 | 2021-01-29 | 惠州市华星光电技术有限公司 | Polarizing structure and liquid crystal display device |
| CN117031595B (en) * | 2023-09-20 | 2023-12-01 | Tcl华星光电技术有限公司 | Light diffusion film, polaroid and display device |
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