TWI533189B - Touch panel - Google Patents
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- TWI533189B TWI533189B TW103127870A TW103127870A TWI533189B TW I533189 B TWI533189 B TW I533189B TW 103127870 A TW103127870 A TW 103127870A TW 103127870 A TW103127870 A TW 103127870A TW I533189 B TWI533189 B TW I533189B
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Description
本發明涉及一種觸控式螢幕,尤其涉及一種可以降低OLED面板反射率的觸控式螢幕。 The present invention relates to a touch screen, and more particularly to a touch screen capable of reducing the reflectivity of an OLED panel.
目前手機面板在強光下的可視性比較差,這主要是因為面板表面對太陽光的反射比較強造成的。相對於LCD面板,OLED面板亮度偏低,為了提高強光下的對比度,需要面板具有更低的反射率。參閱圖1所示,目前OLED面板主要的模組包括觸控式螢幕2(Touch Panel,簡稱TP)、偏光片22(Polarizer,簡稱POL)及發光層23(Organic Light Emitting Diode,簡稱OLED),利用偏光片22可吸收發光層23(OLED器件)表面反射的環境光,因此面板反射率主要由觸控式螢幕2(TP)對外界光的反射率及偏光片22(POL)的偏光度決定。而觸控屏2對外界光的反射有一部分是由其模組內部所包含的電容感應電路層21造成的,該電容感應電路層之二側係均塗佈有一光學透明膠25。 At present, the visibility of the mobile phone panel under strong light is relatively poor, mainly due to the strong reflection of the surface of the panel on sunlight. Compared with the LCD panel, the brightness of the OLED panel is low, and in order to improve the contrast under strong light, the panel needs to have a lower reflectance. As shown in FIG. 1 , the main modules of the OLED panel include a touch panel 2 (Touch Panel, TP for short), a polarizer 22 (Polarizer, POL for short), and an Organic Light Emitting Diode (OLED). The polarizer 22 can absorb the ambient light reflected by the surface of the luminescent layer 23 (OLED device), so the reflectivity of the panel is mainly determined by the reflectivity of the touch screen 2 (TP) to the external light and the polarization of the polarizer 22 (POL). . The reflection of the external light by the touch screen 2 is partially caused by the capacitance sensing circuit layer 21 included in the module. The two sides of the capacitive sensing circuit layer are coated with an optical transparent adhesive 25.
目前廣泛採用的TP種類主要包括GG2,GG,OGS,GFF,G1F,GF2,GF1,其中GG2,GG,GFF,GF2,GF1採用貼和方式構造,即利用光學膠(Optical Clear Adhesive,簡稱OCA)將蒸鍍了電容感應電路的薄膜與蓋板玻璃24貼和在一起。傳統OLED面板的模組的貼和方式是在封裝完成的OLED器件發光層23上依次貼合POL和TP。 Currently widely used TP types mainly include GG2, GG, OGS, GFF, G1F, GF2, GF1, among which GG2, GG, GFF, GF2, GF1 are constructed by means of bonding, that is, using optical glue (Optical Clear) Adhesive (OCA) attaches a film on which a capacitive sensing circuit is vapor-deposited to a cover glass 24. The module of the conventional OLED panel is attached and aligned with POL and TP on the OLED device luminescent layer 23 of the package.
採用上述結構,TP內部電容感應電路結構會對入射的環境光造成一定的反射,該反射光約為1.5%,這使得面板在外界環境光下的對比度下降,其在整個面板反射率中佔有很高的比例,降低該部分的反射可有效提高面板在強光下的可視性。 With the above structure, the internal capacitance sensing circuit structure of the TP will reflect a certain amount of incident ambient light, and the reflected light is about 1.5%, which causes the contrast of the panel under ambient light to decrease, which occupies a very large portion of the panel reflectance. The high ratio, reducing the reflection of this part can effectively improve the visibility of the panel under strong light.
有鑑於此,本發明人潛心構思並更深入研究,終於發明出一種觸控式螢幕。 In view of this, the inventors have conceived and studied more deeply, and finally invented a touch screen.
本發明所要解決的技術問題是提供一種能夠有效降低OLED面板對外界光的反射,提高面板在強光下的對比度與可視性的觸控式螢幕。 The technical problem to be solved by the present invention is to provide a touch screen capable of effectively reducing the reflection of external light by the OLED panel and improving the contrast and visibility of the panel under strong light.
為實現上述技術效果,本發明公開了一種觸控式螢幕,該觸控式螢幕貼合於OLED面板上,該觸控式螢幕包括一電容感應電路層以及封裝於該電容感應電路層上的蓋板玻璃,該電容感應電路層與該蓋板玻璃之間設有一層偏光片。 In order to achieve the above technical effects, the present invention discloses a touch screen that is attached to an OLED panel. The touch screen includes a capacitive sensing circuit layer and a cover encapsulated on the capacitive sensing circuit layer. The plate glass is provided with a polarizer between the capacitor sensing circuit layer and the cover glass.
本發明進一步的改進在於,該蓋板玻璃透過光學透明膠貼合於該偏光片上。 According to a further improvement of the present invention, the cover glass is adhered to the polarizer through an optically transparent adhesive.
本發明進一步的改進在於,該偏光片為一圓偏光片,包括一線偏振片和一1/4波片,該偏光片的下表面附著有 一黏膠層,並且透過該黏膠層貼合於該電容感應電路層上。 A further improvement of the present invention is that the polarizer is a circular polarizer comprising a linear polarizing plate and a quarter wave plate, and the lower surface of the polarizer is attached An adhesive layer is adhered to the capacitive sensing circuit layer through the adhesive layer.
本發明進一步的改進在於,該觸控式螢幕透過光學透明膠貼合於該OLED面板上。 A further improvement of the present invention is that the touch screen is attached to the OLED panel through an optical transparent adhesive.
本發明由於採用了以上技術方案,使其具有以下有益效果:藉由在觸控式螢幕的電容感應電路層與蓋板玻璃之間插入一層偏光片,可有效吸收電容感應電路層造成的入射光的反射,降低OLED面板對外界光的反射,提高面板在強光下的對比度與可視性。 The invention adopts the above technical solutions, and has the following beneficial effects: by inserting a polarizer between the capacitive sensing circuit layer of the touch screen and the cover glass, the incident light caused by the capacitive sensing circuit layer can be effectively absorbed. The reflection reduces the reflection of the OLED panel on external light and improves the contrast and visibility of the panel under strong light.
有關本發明為達成上述目的,所採用之技術、手段及其他之功效,茲舉一較佳可行實施例並配合圖式詳細說明如後。 The present invention has been described in connection with the preferred embodiments of the present invention in accordance with the accompanying drawings.
2‧‧‧觸控式螢幕 2‧‧‧Touch screen
21‧‧‧電容感應電路層 21‧‧‧Capacitive sensing circuit layer
22‧‧‧偏光片 22‧‧‧ polarizer
23‧‧‧發光層 23‧‧‧Lighting layer
24‧‧‧蓋板玻璃 24‧‧‧ Cover glass
25‧‧‧光學透明膠 25‧‧‧Optical transparent adhesive
1‧‧‧觸控式螢幕 1‧‧‧Touch screen
11‧‧‧OLED面板 11‧‧‧OLED panel
12‧‧‧電容感應電路層 12‧‧‧Capacitive sensing circuit layer
13‧‧‧偏光片 13‧‧‧ polarizer
130‧‧‧黏膠層 130‧‧‧Adhesive layer
131‧‧‧線偏振片 131‧‧‧Line polarizer
132‧‧‧1/4波片 132‧‧‧1/4 wave plate
133‧‧‧HC-TAC 133‧‧‧HC-TAC
134‧‧‧TAC 134‧‧‧TAC
135‧‧‧可離層 135‧‧‧Separable layer
14‧‧‧蓋板玻璃 14‧‧‧ Cover glass
15‧‧‧光學透明膠 15‧‧‧Optical transparent adhesive
L‧‧‧光線 L‧‧‧Light
N‧‧‧光軸 N‧‧‧ optical axis
圖1是現有OLED面板模組貼合結構的示意圖。 FIG. 1 is a schematic view of a conventional OLED panel module bonding structure.
圖2是本發明OLED面板模組貼合結構的示意圖。 2 is a schematic view of a bonding structure of an OLED panel module of the present invention.
圖3是偏光片的結構示意圖。 Fig. 3 is a schematic structural view of a polarizer.
圖4是偏光片吸收反射光的原理圖。 4 is a schematic diagram of a polarizer that absorbs reflected light.
在本發明被詳細描述之前,要注意的是在以下的說明內容中,類似的元件是以相同的編號來表示。 Before the present invention is described in detail, it is noted that in the following description, similar elements are denoted by the same reference numerals.
為使 貴審查委員對本發明之目的、特徵及功效能夠有更進一步之瞭解與認識,以下茲請配合【圖式簡單說 明】詳述如後: In order to enable your review committee to have a better understanding and understanding of the purpose, features and effects of the present invention, please follow the following paragraphs. Ming] detailed as follows:
參閱圖2所示,本發明公開了一種觸控式螢幕1,該觸控式螢幕1貼合於OLED面板11上,觸控式螢幕1包括一電容感應電路層12以及封裝於電容感應電路層12上的蓋板玻璃14,其中,電容感應電路層12與蓋板玻璃14之間設有一層偏光片13。蓋板玻璃14透過光學透明膠15貼合於偏光片13上。該觸控式螢幕1透過光學透明膠15貼合於OLED面板11上。 As shown in FIG. 2, the touch screen 1 is attached to the OLED panel 11. The touch screen 1 includes a capacitive sensing circuit layer 12 and is packaged in the capacitive sensing circuit layer. The cover glass 14 on the 12, wherein a polarizing plate 13 is disposed between the capacitive sensing circuit layer 12 and the cover glass 14. The cover glass 14 is bonded to the polarizer 13 through the optically transparent adhesive 15. The touch screen 1 is attached to the OLED panel 11 through the optical transparent adhesive 15 .
偏光片13(Polarizer,簡稱POL)為一圓偏光片,包括一線偏振片131和一1/4波片132,其結構如圖3所示,該線偏振片131之上表面及下表面分別結合有一HC-TAC133及一TAC134,該1/4波片132的上表面及下表面均附著有一黏膠層130(Adhesive Layer),並於下表面之黏膠層130下方設有一可離層135,透過下表面黏膠層130及可離層135貼合於電容感應電路層12的上表面,用來吸收電容感應電路層12內部電路造成的入射光的反射。參閱圖4所示,偏光片13吸收反射光的原理如下: The polarizer 13 (Polarizer) is a circular polarizer comprising a linear polarizing plate 131 and a 1/4 wave plate 132. The structure is as shown in FIG. 3, and the upper surface and the lower surface of the linear polarizing film 131 are respectively combined. The HC-TAC 133 and a TAC 134 have an adhesive layer 130 attached to the upper surface and the lower surface of the 1/4 wave plate 132, and a detachable layer 135 is disposed under the adhesive layer 130 on the lower surface. The lower surface adhesive layer 130 and the detachable layer 135 are attached to the upper surface of the capacitive sensing circuit layer 12 for absorbing the reflection of incident light caused by the internal circuit of the capacitive sensing circuit layer 12. Referring to FIG. 4, the principle of the polarizer 13 absorbing reflected light is as follows:
1/4波片132(quarter-wave plate)為一定厚度的雙折射單晶薄片,當光線L法向入射透過時,尋常光(o光)和非常光(e光)之間的位相差等於π/2或其奇數倍,這樣的晶片稱為四分之一波片或1/4波片。當線偏振光垂直入射1/4波片132,並且光線L的偏振和雲母的光軸N面(垂直自然 裂開面)成θ=45°時,出射光為圓偏振光。圓偏振光經過電容感應電路層12內部電路反射後,具有π相位延遲,所以其圓偏振的旋轉方向改變,再經過四分之一波片成為偏振方向與線偏振片偏振方向垂直的線偏振光,故該反射光會被偏振片吸收,不會從面板出射。因此將偏光片POL放置於電容感應電路層12上方,可使得TP內部電容感應電路層12造成的入射光的反射被偏光片POL吸收,可有效降低OLED面板對外界光的反射,提高面板在強光下的對比度與可視性。偏光片13的上表面進一步透過光學透明膠15貼合於蓋板玻璃14。 A quarter-wave plate is a birefringent single crystal sheet having a certain thickness. When the light L is incident at the normal direction, the phase difference between the ordinary light (o light) and the extraordinary light (e light) is equal to π/2 or an odd multiple thereof, such a wafer is called a quarter wave plate or a quarter wave plate. When the linearly polarized light is incident perpendicular to the 1/4 wave plate 132, and the polarization of the light L and the optical axis of the mica are N-sided (vertical natural When the cleavage plane is θ=45°, the emitted light is circularly polarized light. After the circularly polarized light is reflected by the internal circuit of the capacitive sensing circuit layer 12, it has a π phase retardation, so the rotation direction of the circular polarization changes, and then the quarter-wave plate becomes a linearly polarized light whose polarization direction is perpendicular to the polarization direction of the linear polarizing plate. Therefore, the reflected light is absorbed by the polarizing plate and does not exit from the panel. Therefore, the polarizer POL is placed on the capacitor sensing circuit layer 12, so that the reflection of the incident light caused by the TP internal capacitance sensing circuit layer 12 is absorbed by the polarizer POL, which can effectively reduce the reflection of the OLED panel on external light and improve the panel. Contrast and visibility under light. The upper surface of the polarizer 13 is further bonded to the cover glass 14 through the optically transparent adhesive 15.
以上結合附圖實施例對本發明進行了詳細說明,本領域中普通技術人員可根據上述說明對本發明做出種種變化例。因而,實施例中的某些細節不應構成對本發明的限定,本發明將以所附權利要求書界定的範圍作為本發明的保護範圍。 The present invention has been described in detail above with reference to the embodiments of the drawings, and various modifications of the invention can be made by those skilled in the art in light of the above description. Therefore, some of the details of the embodiments are not to be construed as limiting the scope of the invention, which is defined by the appended claims.
由上述得知本發明確實符合「具有產業可利用性」、「新穎性」、「進步性」,爰依法提出發明專利申請,祈請惠予審查並早日賜准專利,實感德便。 From the above, it is known that the present invention truly conforms to "industrial availability," "novelty," and "progressiveness", and submits an invention patent application in accordance with the law, praying for review and early granting of a patent, and it is truly sensible.
1‧‧‧觸控式螢幕 1‧‧‧Touch screen
11‧‧‧OLED面板 11‧‧‧OLED panel
12‧‧‧電容感應電路層 12‧‧‧Capacitive sensing circuit layer
13‧‧‧偏光片 13‧‧‧ polarizer
14‧‧‧蓋板玻璃 14‧‧‧ Cover glass
15‧‧‧光學透明膠 15‧‧‧Optical transparent adhesive
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CN104932750A (en) * | 2015-06-30 | 2015-09-23 | 京东方科技集团股份有限公司 | Touch screen and manufacturing method thereof and touch display device |
CN105096758A (en) * | 2015-07-23 | 2015-11-25 | 上海和辉光电有限公司 | Display device |
CN107145255A (en) * | 2017-04-12 | 2017-09-08 | 深圳市骏达光电股份有限公司 | Curved touch screen and preparation method thereof |
CN109659332A (en) * | 2017-10-11 | 2019-04-19 | 上海和辉光电有限公司 | Antireflection blocks water oxygen component and its manufacturing method, flexible display device |
CN109659333A (en) * | 2017-10-11 | 2019-04-19 | 上海和辉光电有限公司 | Antireflection blocks water oxygen component and its manufacturing method, flexible display device |
CN108873447B (en) * | 2018-06-14 | 2021-08-03 | 业成科技(成都)有限公司 | Touch control display device |
CN112131913A (en) * | 2019-06-25 | 2020-12-25 | Oppo广东移动通信有限公司 | Display module device, electronic apparatus, and method of assembling display module device |
CN112449034A (en) * | 2019-08-30 | 2021-03-05 | 北京小米移动软件有限公司 | Mobile terminal |
CN110708408A (en) * | 2019-11-05 | 2020-01-17 | 汕头超声显示器技术有限公司 | Mobile phone with curved screen |
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CN203012295U (en) * | 2012-12-04 | 2013-06-19 | 深圳市三海光电技术有限公司 | Thin film type capacitive touch screen liquid crystal board module of transparent conducting film matched antireflective film |
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