TWI492436B - Flexible display panel - Google Patents
Flexible display panel Download PDFInfo
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- TWI492436B TWI492436B TW101142863A TW101142863A TWI492436B TW I492436 B TWI492436 B TW I492436B TW 101142863 A TW101142863 A TW 101142863A TW 101142863 A TW101142863 A TW 101142863A TW I492436 B TWI492436 B TW I492436B
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- film layer
- encapsulating film
- encapsulation film
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- display elements
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- 230000009975 flexible effect Effects 0.000 title claims description 87
- 239000000758 substrate Substances 0.000 claims description 28
- 239000010410 layer Substances 0.000 description 207
- 239000010408 film Substances 0.000 description 182
- 238000005538 encapsulation Methods 0.000 description 125
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 21
- 229910052760 oxygen Inorganic materials 0.000 description 21
- 239000001301 oxygen Substances 0.000 description 21
- 230000000694 effects Effects 0.000 description 14
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 12
- 238000000034 method Methods 0.000 description 10
- 230000000875 corresponding effect Effects 0.000 description 9
- 239000000463 material Substances 0.000 description 6
- 239000011229 interlayer Substances 0.000 description 4
- 230000000903 blocking effect Effects 0.000 description 3
- 230000002596 correlated effect Effects 0.000 description 3
- 238000005229 chemical vapour deposition Methods 0.000 description 2
- 238000004891 communication Methods 0.000 description 2
- 238000005240 physical vapour deposition Methods 0.000 description 2
- 239000011247 coating layer Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 238000001459 lithography Methods 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 239000012528 membrane Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000004806 packaging method and process Methods 0.000 description 1
- 238000000059 patterning Methods 0.000 description 1
- 238000004544 sputter deposition Methods 0.000 description 1
- 239000010409 thin film Substances 0.000 description 1
Classifications
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K50/00—Organic light-emitting devices
- H10K50/80—Constructional details
- H10K50/84—Passivation; Containers; Encapsulations
- H10K50/844—Encapsulations
- H10K50/8445—Encapsulations multilayered coatings having a repetitive structure, e.g. having multiple organic-inorganic bilayers
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K2102/00—Constructional details relating to the organic devices covered by this subclass
- H10K2102/301—Details of OLEDs
- H10K2102/311—Flexible OLED
Description
本發明係關於一種可撓式顯示面板，尤指一種具有高度阻水氧效果的可撓式顯示面板。The invention relates to a flexible display panel, in particular to a flexible display panel with a high water-blocking oxygen effect.
可撓式顯示面板由於具有類似紙張的特性，因此可預期將地將用來實現電子紙(Electronic Paper)或電子書的應用，而取代紙張成為資料的記錄媒介。Due to the paper-like characteristics of the flexible display panel, it is expected that the application will be realized for electronic paper or e-book instead of paper as a recording medium for data.
請參考第1圖。第1圖繪示了習知可撓式顯示面板之示意圖。如第1圖所示，習知可撓式顯示面板10主要包含可撓式基板12、形成於可撓式基板12上的顯示元件14，以及覆蓋顯示元件14的封裝膜層16。封裝膜層16的作用在於保護顯示元件14並避免顯示元件14因為接觸到環境的水氣而受損。然而，當可撓式顯示面板10被撓曲時，封裝膜層16會受到水平方向應力18的拉扯而產生裂痕20，形成水氧入侵的路徑。裂痕20會進一步沿著平行於封裝膜層16的表面的方向擴散(crack propagation)，而擴大水氧入侵的影響範圍。水氧入侵後將使得顯示元件14的亮度降低，並嚴重影響顯示元件14的元件壽命。Please refer to Figure 1. FIG. 1 is a schematic view of a conventional flexible display panel. As shown in FIG. 1 , the conventional flexible display panel 10 mainly includes a flexible substrate 12 , a display element 14 formed on the flexible substrate 12 , and an encapsulation film layer 16 covering the display element 14 . The function of the encapsulation film layer 16 is to protect the display element 14 and to prevent the display element 14 from being damaged by moisture that is exposed to the environment. However, when the flexible display panel 10 is flexed, the encapsulating film layer 16 is subjected to the pulling of the horizontal stress 18 to cause cracks 20, forming a path of water oxygen intrusion. The crack 20 will further propagate along a direction parallel to the surface of the encapsulation film layer 16, thereby expanding the range of influence of water oxygen intrusion. The water oxygen intrusion will cause the brightness of the display element 14 to decrease and severely affect the component life of the display element 14.
本發明之目的之一在於提供一種可撓式顯示面板，以解決習知封裝膜層易產生裂痕的問題。One of the objects of the present invention is to provide a flexible display panel to solve the problem that the conventional encapsulating film layer is prone to cracks.
本發明之一實施例提供一種可撓式顯示面板，包含一可撓式基板、複數個顯示元件設置於可撓式基板上，以及至少一封裝膜層覆蓋顯示元件。封裝膜層之上表面具有複數個溝槽，至少對應於部分相鄰之顯示元件之間。An embodiment of the present invention provides a flexible display panel including a flexible substrate, a plurality of display elements disposed on the flexible substrate, and at least one encapsulating film layer covering the display elements. The upper surface of the encapsulation film layer has a plurality of grooves corresponding at least between the partially adjacent display elements.
本發明之另一實施例提供一種可撓式顯示面板，包含一可撓式基板、複數個顯示元件設置於可撓式基板上，以及至少一封裝膜層覆蓋顯示元件。封裝膜層具有一上表面，其中封裝膜層之上表面具有複數個溝槽，且溝槽內具有空氣。Another embodiment of the present invention provides a flexible display panel including a flexible substrate, a plurality of display elements disposed on the flexible substrate, and at least one encapsulating film layer covering the display elements. The encapsulation film layer has an upper surface, wherein the upper surface of the encapsulation film layer has a plurality of grooves, and the grooves have air therein.
本發明之可撓式顯示面板具有包覆顯示元件的封裝膜層，且封裝膜層之上表面具有溝槽，可有效減少可撓式顯示面板在被外力撓曲時所產生的水平方向應力，因此可避免封裝膜層產生裂痕。如此一來，可大幅降低水氧入侵的機率，有效提升顯示元件的元件壽命。The flexible display panel of the present invention has an encapsulation film layer covering the display element, and the surface of the encapsulation film layer has a groove, which can effectively reduce the horizontal stress generated by the flexible display panel when being flexed by an external force. Therefore, cracks in the encapsulating film layer can be avoided. In this way, the probability of water and oxygen intrusion can be greatly reduced, and the component life of the display element can be effectively improved.
為使熟習本發明所屬技術領域之一般技藝者能更進一步了解本發明，下文特列舉本發明之較佳實施例，並配合所附圖式，詳細說明本發明的構成內容及所欲達成之功效。The present invention will be further understood by those of ordinary skill in the art to which the present invention pertains. .
請參考第2圖與第3圖。第2圖繪示了本發明之第一實施例之可撓式顯示面板之上視示意圖，而第3圖繪示了第2圖之可撓式顯示面板之剖面示意圖。如第2圖與第3圖所示，本實施例之可撓式顯示面板30包含可撓式基板22、複數個顯示元件24以及至少一封裝膜層26。可撓式基板22可為例如塑膠基板，但不以此為限而可為各式具有可撓曲特性的基板。可撓式基板22具有一顯示區22D，而顯示元件24係設置於可撓式基板22之顯示區22D內。精確地說，顯示元件24係分別設置於顯示區22D之次畫素(圖未示)內，用以分別提供對應的次畫素所需的畫面。顯示元件24可包含例如有機發光二極體(OLED)元件，但不以此為限而亦可為各類型之顯示元件。另外，若可撓式顯示面板30為主動矩陣式顯示面板，則可撓式基板22上可進一步設置主動開關元件(例如薄膜電晶體元件)(圖未示)。顯示元件24可包含用以提供不同色畫面的顯示元件，例如紅色顯示元件24R、綠色顯示元件24G與藍色顯示元件24B，但不以此為限。此外，紅色顯示元件24R、綠色顯示元件24G與藍色顯示元件24B可為直條狀排列，但不以此為限而可為其它適合的排列。相鄰的顯示元件24的間距大體上可介於15微米與20微米之間，但不以此為限。封裝膜層26的面積大於顯示區22D的面積，且封裝膜層26的範圍完全涵蓋顯示區22D的範圍並覆蓋顯示元件24，用以保護顯示元件24並阻隔水氧，以使得顯示元件24不會受到外界的水氣侵入而受損。封裝膜層26的厚度t應大於3微米，例如較佳介於5微米與8微米之間，以獲致較佳的阻水氧效果，但不以此為限。封裝膜層26之上表面26S具有複數個溝槽28，至少對應於部分相鄰之顯 示元件24之間。封裝膜層26係將顯示元件24完全包覆，而封裝膜層26的上表面26S可暴露在外，因此溝槽28內可具有空氣。在本實施例中，溝槽28的寬度係小於相鄰的顯示元件24的間距，例如溝槽28的寬度大體上介於1微米與2微米之間，但不以此為限。另外，各溝槽28係環繞對應之各顯示元件24之周圍。也就是說，任一個顯示元件24的周圍係被一個對應的溝槽28所環繞，使得顯示元件24與溝槽28在垂直投影方向上不重疊。如第2圖所示，由上視方向觀看，各溝槽28可具有環狀圖案，例如口字型圖案，且溝槽28分別為封閉型環繞圖案，彼此互不連通。如第3圖所示，由剖面方向觀看，相鄰的兩個顯示元件24之間會有兩個溝槽28。在本實施例中，封裝膜層26係為單一封裝膜層，其可包含有機封裝膜層、無機封裝膜層或有機/無機混合膜層。一般而言，無機封裝膜層的阻水氧效果優於有機封裝膜層的阻水氧效果，但無機封裝膜層的應力與其厚度呈正相關，而過大的應力會導致無機封裝膜層破裂。因此在材料的選擇上，可視阻水氧效果的規格與封裝膜層26的厚度的規格選用有機封裝膜層、無機封裝膜層或有機/無機混合膜層。封裝膜層26可利用物理氣相沉積(PVD)製程例如蒸鍍(evaporation)製程或濺鍍(sputtering)製程，化學氣相沉積(CVD)製程、雷射熱轉印(laser induced thermal image,LITI)製程、印刷(printing)製程與塗布(coating)製程等形成，而溝槽28可於形成封裝膜層26的過程中一併形成，或者在形成封裝膜層26之後再利用圖案化製程例如雷射切割製程或微影蝕刻製程加以形成。Please refer to Figures 2 and 3. 2 is a top view of the flexible display panel of the first embodiment of the present invention, and FIG. 3 is a cross-sectional view of the flexible display panel of FIG. 2 . As shown in FIGS. 2 and 3 , the flexible display panel 30 of the present embodiment includes a flexible substrate 22 , a plurality of display elements 24 , and at least one encapsulation film layer 26 . The flexible substrate 22 can be, for example, a plastic substrate, but not limited thereto can be various substrates having flexible properties. The flexible substrate 22 has a display area 22D, and the display element 24 is disposed in the display area 22D of the flexible substrate 22. To be precise, the display elements 24 are respectively disposed in the sub-pixels (not shown) of the display area 22D for respectively providing the pictures required for the corresponding sub-pixels. The display element 24 may comprise, for example, an organic light emitting diode (OLED) element, but not limited thereto may be various types of display elements. In addition, if the flexible display panel 30 is an active matrix display panel, an active switching element (for example, a thin film transistor element) (not shown) may be further disposed on the flexible substrate 22. The display element 24 may include display elements for providing different color pictures, such as the red display element 24R, the green display element 24G and the blue display element 24B, but not limited thereto. In addition, the red display element 24R, the green display element 24G, and the blue display element 24B may be arranged in a straight strip shape, but may not be other suitable arrangements. The spacing of adjacent display elements 24 can be generally between 15 microns and 20 microns, but is not limited thereto. The area of the encapsulation film layer 26 is larger than the area of the display area 22D, and the range of the encapsulation film layer 26 completely covers the range of the display area 22D and covers the display element 24 to protect the display element 24 and block water oxygen so that the display element 24 does not It will be damaged by the intrusion of water from the outside world. The thickness t of the encapsulating film layer 26 should be greater than 3 micrometers, for example, preferably between 5 micrometers and 8 micrometers, to achieve a better water-blocking oxygen effect, but not limited thereto. The upper surface 26S of the encapsulation film layer 26 has a plurality of grooves 28, at least corresponding to a portion of the adjacent display Between elements 24 are shown. The encapsulation film layer 26 completely encloses the display element 24, while the upper surface 26S of the encapsulation film layer 26 can be exposed, so that there can be air in the trenches 28. In this embodiment, the width of the trenches 28 is smaller than the pitch of the adjacent display elements 24. For example, the width of the trenches 28 is substantially between 1 micrometer and 2 micrometers, but not limited thereto. In addition, each of the grooves 28 surrounds the periphery of the corresponding display element 24. That is, the periphery of any of the display elements 24 is surrounded by a corresponding groove 28 such that the display elements 24 and the grooves 28 do not overlap in the vertical projection direction. As shown in FIG. 2, each of the grooves 28 may have an annular pattern, such as a square-shaped pattern, as viewed in a top view, and the grooves 28 are respectively closed-type surrounding patterns, which are not in communication with each other. As shown in Fig. 3, there are two grooves 28 between the adjacent two display elements 24 as viewed in the cross-sectional direction. In the present embodiment, the encapsulation film layer 26 is a single encapsulation film layer, which may include an organic encapsulation film layer, an inorganic encapsulation film layer, or an organic/inorganic hybrid film layer. In general, the water-blocking oxygen effect of the inorganic encapsulating film layer is better than that of the organic encapsulating film layer, but the stress of the inorganic encapsulating film layer is positively correlated with the thickness thereof, and excessive stress may cause the inorganic encapsulating film layer to rupture. Therefore, in the selection of the material, the specification of the visible water-blocking oxygen effect and the thickness of the encapsulating film layer 26 are selected from an organic encapsulating film layer, an inorganic encapsulating film layer or an organic/inorganic hybrid film layer. The encapsulation film layer 26 may utilize a physical vapor deposition (PVD) process such as an evaporation process or a sputtering process, a chemical vapor deposition (CVD) process, and a laser induced thermal image (LITI). a process, a printing process, a coating process, and the like, and the trenches 28 may be formed together in the process of forming the encapsulation film layer 26, or after forming the encapsulation film layer 26, using a patterning process such as a thunder A shot cutting process or a lithography process is formed.
請再參考第4圖。第4圖繪示了第3圖之可撓式顯示面板在撓曲狀態下的剖面示意圖。如第4圖所示，當可撓式顯示面板30被外力所撓曲時，會產生水平方向應力29。根據材料力學原理，水平方向應力29會與封裝膜層26在水平方向上的長度呈正相關。封裝膜層26之上表面26S上的溝槽28可以減少封裝膜層26在水平方向上的長度。精確地說，對於封裝膜層26上的任一點而言，水平方向應力29是由相鄰的溝槽28之間的水平長度所造成，因此溝槽28可發揮減少水平方向應力29的效果，而使得封裝膜層26不會因為水平方向應力29過大而產生裂痕。如此一來，可大幅降低水氧入侵的機率，有效提升顯示元件24的元件壽命。溝槽28之深度d係小於封裝膜層26之厚度t。溝槽28的深度d過小時，對於減少水平方向應力29的效果有限；溝槽28的深度d過大時，可能造成封裝膜層26的阻水氧效果不佳，因此在決定溝槽28的深度d時，應考量上述兩項因素。舉例而言，溝槽28之深度d與封裝膜層26之厚度的比值大體上係介於30%與40%之間，但不以此為限。Please refer to Figure 4 again. FIG. 4 is a cross-sectional view showing the flexible display panel of FIG. 3 in a flexed state. As shown in Fig. 4, when the flexible display panel 30 is deflected by an external force, a horizontal stress 29 is generated. According to the material mechanics principle, the horizontal stress 29 is positively correlated with the length of the encapsulating film layer 26 in the horizontal direction. The grooves 28 on the upper surface 26S of the encapsulation film layer 26 can reduce the length of the encapsulation film layer 26 in the horizontal direction. Precisely, for any point on the encapsulation film layer 26, the horizontal stress 29 is caused by the horizontal length between adjacent trenches 28, so that the trenches 28 can exert the effect of reducing the horizontal stress 29, The encapsulating film layer 26 is not caused to be cracked due to the excessive stress 29 in the horizontal direction. In this way, the probability of water and oxygen intrusion can be greatly reduced, and the component life of the display element 24 can be effectively improved. The depth d of the trench 28 is less than the thickness t of the encapsulation film layer 26. When the depth d of the trench 28 is too small, the effect of reducing the horizontal stress 29 is limited; when the depth d of the trench 28 is too large, the water blocking oxygen effect of the encapsulating film layer 26 may be poor, so the depth of the trench 28 is determined. When considering d, the above two factors should be considered. For example, the ratio of the depth d of the trench 28 to the thickness of the encapsulation film layer 26 is substantially between 30% and 40%, but is not limited thereto.
本發明之可撓式顯示面板並不以上述實施例為限。下文將依序介紹本發明之其它較佳實施例與變化實施例之可撓式顯示面板，且為了便於比較各實施例之相異處並簡化說明，在下文之各實施例中使用相同的符號標注相同的元件，且主要針對各實施例之相異處進行說明，而不再對重覆部分進行贅述。The flexible display panel of the present invention is not limited to the above embodiment. The flexible display panels of other preferred embodiments and modified embodiments of the present invention will be sequentially described below, and the same symbols are used in the following embodiments in order to facilitate the comparison of the differences of the embodiments and simplify the description. The same elements are denoted by the same, and the differences between the embodiments are mainly explained, and the repeated parts will not be described again.
請參考第5圖與第6圖。第5圖繪示了本發明之第一實施例之第 一變化實施例之可撓式顯示面板之上視示意圖，第6圖繪示了第5圖之可撓式顯示面板之剖面示意圖。如第5圖與第6圖所示，不同於第一實施例，在本第一變化實施例之可撓式顯示面板30’中，相鄰的溝槽28係彼此連通，因此所有溝槽28會呈現網格狀分布於封裝膜層26的上表面26S。換言之，由剖面方向觀看，相鄰的兩個顯示元件24之間僅具有一個溝槽28。在本實施例中，網格狀分布之溝槽28的製程較為簡單，且溝槽28的寬度係小於相鄰的顯示元件24的間距，例如溝槽28的寬度大體上介於5微米與9微米之間，但不以此為限。Please refer to Figure 5 and Figure 6. Figure 5 is a diagram showing the first embodiment of the present invention. FIG. 6 is a schematic cross-sectional view of the flexible display panel of FIG. 5, and FIG. 6 is a schematic cross-sectional view of the flexible display panel of FIG. 5. As shown in FIGS. 5 and 6, unlike the first embodiment, in the flexible display panel 30' of the first modified embodiment, adjacent grooves 28 are in communication with each other, and thus all the grooves 28 There will be a grid-like distribution on the upper surface 26S of the encapsulation film layer 26. In other words, there is only one trench 28 between the adjacent two display elements 24 as viewed in the cross-sectional direction. In the present embodiment, the process of the grid-likely distributed trenches 28 is relatively simple, and the width of the trenches 28 is smaller than the pitch of adjacent display elements 24, for example, the width of the trenches 28 is substantially between 5 micrometers and 9 Between microns, but not limited to this.
請參考第7圖與第8圖。第7圖繪示了本發明之第一實施例之第二變化實施例之可撓式顯示面板之上視示意圖，而第8圖繪示了第7圖之可撓式顯示面板之剖面示意圖。如第7圖與第8圖所示，在本第二變化實施例中，可撓式顯示面板30”的顯示元件24可區分成數組顯示單元24U。各顯示單元24U係由複數個顯示元件24所組成，各顯示單元24U所包含的顯示元件24的數目可視阻水氧需求或其它考量作變更，且各溝槽28係環繞對應之顯示單元24U之周圍。在本第二變化實施例中，溝槽28分別為封閉型環繞圖案，彼此互不連通，但不以此為限。在另一變實施例中，相鄰的溝槽28亦可彼此連通，因此所有溝槽28會呈現網格狀分布。Please refer to Figure 7 and Figure 8. FIG. 7 is a top plan view showing a flexible display panel according to a second variation of the first embodiment of the present invention, and FIG. 8 is a cross-sectional view showing the flexible display panel of FIG. 7. As shown in Figures 7 and 8, in the second modified embodiment, the display elements 24 of the flexible display panel 30" can be divided into an array display unit 24U. Each display unit 24U is composed of a plurality of display elements 24 The number of the display elements 24 included in each display unit 24U can be changed according to the water-blocking oxygen demand or other considerations, and each groove 28 surrounds the periphery of the corresponding display unit 24U. In the second variation embodiment, The trenches 28 are respectively closed-type surrounding patterns, which are not connected to each other, but are not limited thereto. In another variant, the adjacent trenches 28 can also communicate with each other, so that all the trenches 28 will present a grid. Distribution.
請參考第9圖。第9圖繪示了本發明之第二實施例之可撓式顯示面板之示意圖。如第9圖所示，在本實施例中，可撓式顯示面板40 之封裝膜層26包含第一封裝膜層261以及第二封裝膜層262。第一封裝膜層261係設置於可撓式基板22上並包覆顯示元件24。第二封裝膜層262係覆蓋第一封裝膜層261，且第二封裝膜層262可進一步包覆第一封裝膜層261的側邊，以增加側邊的阻水氧效果。第一封裝膜層261之上表面261S大體上係為平坦表面，且第二封裝膜層262之上表面262S具有溝槽28。在本實施例中，溝槽28之深度d係小於第二封裝膜層262之厚度t2，但不以此為限。在其它變化實施例中，溝槽28之深度d可等於第二封裝膜層262之厚度t2，或是大於第二封裝膜層262之厚度t2而到達第一封裝膜層261的內部。另外，第一封裝膜層261與第二封裝膜層262可分別包含有機封裝膜層、無機封裝膜層或有機/無機混合膜層。無機封裝膜層的阻水氧效果優於有機封裝膜層的阻水氧效果，但無機封裝膜層的應力與其厚度呈正相關，而過大的應力會導致無機封裝膜層破裂。因此在材料的選擇上，可視阻水氧效果的規格與封裝膜層26的厚度的規格選用有機封裝膜層、無機封裝膜層或有機/無機混合膜層。較佳地，第一封裝膜層261與第二封裝膜層262可為相同或不同材質。舉例而言，第一封裝膜層261與第二封裝膜層262可均為有機封裝膜層或無機封裝膜層。或者，第一封裝膜層261為無機封裝膜層，且第二封裝膜層262為有機封裝膜層；或是第一封裝膜層261為有機封裝膜層，且第二封裝膜層262為無機封裝膜層。無機封裝膜層與有機封裝膜層的搭配組合可以兼顧阻水氧效果與避免應力過大的優點。另外，在本實施例中，各溝槽28係環繞對應之各顯示元件24之周圍。在其它變化實施例中，顯示元件24可區分為複數組顯 示單元24U，其中各顯示單元係由複數個顯示元件24所組成，且各溝槽28係環繞對應之顯示單元24U之周圍。Please refer to Figure 9. FIG. 9 is a schematic view showing a flexible display panel according to a second embodiment of the present invention. As shown in FIG. 9, in the present embodiment, the flexible display panel 40 The encapsulation film layer 26 includes a first encapsulation film layer 261 and a second encapsulation film layer 262. The first encapsulation film layer 261 is disposed on the flexible substrate 22 and covers the display element 24. The second encapsulation film layer 262 covers the first encapsulation film layer 261, and the second encapsulation film layer 262 may further cover the side edges of the first encapsulation film layer 261 to increase the water-blocking oxygen effect of the side edges. The upper surface 261S of the first encapsulation film layer 261 is substantially a flat surface, and the upper surface 262S of the second encapsulation film layer 262 has a groove 28. In this embodiment, the depth d of the trench 28 is smaller than the thickness t2 of the second encapsulation film layer 262, but is not limited thereto. In other variant embodiments, the depth d of the trench 28 may be equal to the thickness t2 of the second encapsulation film layer 262 or greater than the thickness t2 of the second encapsulation film layer 262 to reach the interior of the first encapsulation film layer 261. In addition, the first encapsulation film layer 261 and the second encapsulation film layer 262 may respectively include an organic encapsulation film layer, an inorganic encapsulation film layer, or an organic/inorganic hybrid film layer. The water-blocking oxygen effect of the inorganic encapsulating film layer is better than that of the organic encapsulating film layer, but the stress of the inorganic encapsulating film layer is positively correlated with the thickness thereof, and the excessive stress causes the inorganic encapsulating film layer to be broken. Therefore, in the selection of the material, the specification of the visible water-blocking oxygen effect and the thickness of the encapsulating film layer 26 are selected from an organic encapsulating film layer, an inorganic encapsulating film layer or an organic/inorganic hybrid film layer. Preferably, the first encapsulation film layer 261 and the second encapsulation film layer 262 may be the same or different materials. For example, the first encapsulation film layer 261 and the second encapsulation film layer 262 may both be an organic encapsulation film layer or an inorganic encapsulation film layer. Alternatively, the first encapsulation film layer 261 is an inorganic encapsulation film layer, and the second encapsulation film layer 262 is an organic encapsulation film layer; or the first encapsulation film layer 261 is an organic encapsulation film layer, and the second encapsulation film layer 262 is inorganic Encapsulation film layer. The combination of the inorganic encapsulating film layer and the organic encapsulating film layer can take advantage of both the water-blocking oxygen effect and the excessive stress avoidance. Further, in the present embodiment, each of the grooves 28 surrounds the periphery of the corresponding display element 24. In other variant embodiments, the display element 24 can be distinguished as a complex array display. The display unit 24U, wherein each display unit is composed of a plurality of display elements 24, and each of the grooves 28 surrounds the periphery of the corresponding display unit 24U.
請參考第10圖。第10圖繪示了本發明之第三實施例之可撓式顯示面板之示意圖。如第10圖所示，在本實施例中，可撓式顯示面板50之封裝膜層26包含複數層封裝膜層，設置於可撓式基板22上並包覆顯示元件24。複數層封裝膜層可以進一步增加阻水氧效果。舉例而言，封裝膜層26包含最底層(bottommost)封裝膜層26A、兩層中間層封裝膜層26B,26C以及最頂層(topmost)封裝膜層26D。最底層封裝膜層26A覆蓋顯示元件24，中間層封裝膜層26B覆蓋最底層封裝膜層26A，並進一步包覆最底層封裝膜層26A的側邊以增加側邊的阻水氧效果，中間層封裝膜層26C覆蓋中間層封裝膜層26B，最頂層封裝膜層26D覆蓋中間層封裝膜層26C，並進一步包覆中間層封裝膜層26C的側邊以增加側邊的阻水氧效果。最頂層封裝膜層26D的上表面26DS具有溝槽28。最底層封裝膜層26A、兩層中間層封裝膜層26B,26C以及最頂層封裝膜層26D可分別包含有機封裝膜層、無機封裝膜層或有機/無機混合膜層。最底層封裝膜層26A、兩層中間層封裝膜層26B,26C以及最頂層封裝膜層26D可為相同或不同材質。舉例而言，最底層封裝膜層26A、兩層中間層封裝膜層26B,26C以及最頂層封裝膜層26D可均為有機封裝膜層或無機封裝膜層。或者，最底層封裝膜層26A、兩層中間層封裝膜層26B,26C以及最頂層封裝膜層26D可為有機封裝膜層與無機封裝膜層的堆壘結構。例如，最底層封裝膜層26A為無機封裝膜層，中間層封 裝膜層26B為有機封裝膜層，中間層封裝膜層26C為無機封裝膜層，且最頂層封裝膜層26D為有機封裝膜層；或是最底層封裝膜層26A為有機封裝膜層，中間層封裝膜層26B為無機封裝膜層，中間層封裝膜層26C為有機封裝膜層，且最頂層封裝膜層26D為無機封裝膜層，但不以此為限。在本實施例中，溝槽28之深度d係小於封裝膜層26D之厚度td，但不以此為限。在其它變化實施例中，溝槽28之深度d可等於封裝膜層26D之厚度td，或是大於封裝膜層26D之厚度td而到達封裝膜層26C、封裝膜層26B或封裝膜層26A的內部。另外，在本實施例中，封裝膜層26包含四層封裝膜層，而在其它變化實施例中，封裝膜層26可視阻水氧需求或其它考量包含三層封裝膜層或更多層封裝膜層。另外，在其它變化實施例中，顯示元件24可包含複數組顯示單元，其中各顯示單元係由複數個顯示元件24所組成，且各溝槽28係環繞對應之顯示單元之周圍。Please refer to Figure 10. FIG. 10 is a schematic view showing a flexible display panel according to a third embodiment of the present invention. As shown in FIG. 10, in the present embodiment, the encapsulation film layer 26 of the flexible display panel 50 includes a plurality of encapsulation film layers disposed on the flexible substrate 22 and covering the display elements 24. The multiple layer encapsulation film layer can further increase the water blocking oxygen effect. For example, the encapsulation film layer 26 includes a bottommost package film layer 26A, two intermediate layer encapsulation film layers 26B, 26C, and a topmost encapsulation film layer 26D. The bottommost encapsulation film layer 26A covers the display element 24, and the interlayer encapsulation film layer 26B covers the bottommost encapsulation film layer 26A, and further covers the sides of the bottommost encapsulation film layer 26A to increase the side water-blocking oxygen effect, the intermediate layer The encapsulation film layer 26C covers the intermediate layer encapsulation film layer 26B, and the topmost encapsulation film layer 26D covers the intermediate layer encapsulation film layer 26C and further covers the sides of the intermediate layer encapsulation film layer 26C to increase the side water blocking oxygen effect. The upper surface 26DS of the topmost encapsulation film layer 26D has a trench 28. The bottommost package film layer 26A, the two intermediate layer package film layers 26B, 26C and the topmost package film layer 26D may respectively comprise an organic encapsulation film layer, an inorganic encapsulation film layer or an organic/inorganic hybrid film layer. The bottommost encapsulation film layer 26A, the two interlayer encapsulation film layers 26B, 26C, and the topmost encapsulation film layer 26D may be the same or different materials. For example, the bottommost encapsulation film layer 26A, the two interlayer encapsulation film layers 26B, 26C, and the topmost encapsulation film layer 26D may all be an organic encapsulation film layer or an inorganic encapsulation film layer. Alternatively, the bottommost encapsulation film layer 26A, the two interlayer encapsulation film layers 26B, 26C, and the topmost encapsulation film layer 26D may be a stacked structure of the organic encapsulation film layer and the inorganic encapsulation film layer. For example, the bottommost encapsulation film layer 26A is an inorganic encapsulation film layer, and the middle layer is sealed. The coating layer 26B is an organic encapsulating film layer, the intermediate layer encapsulating film layer 26C is an inorganic encapsulating film layer, and the topmost encapsulating film layer 26D is an organic encapsulating film layer; or the bottommost encapsulating film layer 26A is an organic encapsulating film layer, in the middle The layer of the encapsulating film layer 26B is an inorganic encapsulating film layer, the intermediate layer encapsulating film layer 26C is an organic encapsulating film layer, and the topmost encapsulating film layer 26D is an inorganic encapsulating film layer, but not limited thereto. In this embodiment, the depth d of the trench 28 is smaller than the thickness td of the package film layer 26D, but is not limited thereto. In other variant embodiments, the depth d of the trench 28 may be equal to the thickness td of the encapsulation film layer 26D or greater than the thickness td of the encapsulation film layer 26D to the encapsulation film layer 26C, the encapsulation film layer 26B or the encapsulation film layer 26A. internal. In addition, in the present embodiment, the encapsulation film layer 26 includes four layers of encapsulation film layers, and in other variant embodiments, the encapsulation film layer 26 may include three layers of encapsulation film layers or more layers of packaging depending on water and oxygen requirements or other considerations. Membrane layer. In addition, in other variant embodiments, display element 24 can include a complex array of display units, wherein each display unit is comprised of a plurality of display elements 24, and each of the grooves 28 surrounds the periphery of the corresponding display unit.
請參考第10圖。第10圖繪示了本發明之第四實施例之可撓式顯示面板之示意圖。如第10圖所示，在本實施例中，可撓式顯示面板60之封裝膜層26包含至少一第一封裝膜層261以及複數個多層封裝結構26X。第一封裝膜層261係設置於可撓式基板22上並包覆顯示元件24。多層封裝結構26X係位於第一封裝膜層261上並對應於至少一顯示元件24。第一封裝膜層261之上表面261S大體上係為平坦表面，且各溝槽28係分別位於相鄰之多層封裝結構26X之間。在本實施例中，多層封裝結構26X例如包含四層封裝結構層26X1,26X2,26X3,26X4，但不以此為限。第一封裝膜層261可包含有機 封裝膜層、無機封裝膜層或有機/無機混合膜層。多層封裝結構26X之四層封裝結構層26X1,26X2,26X3,26X4可分別包含有機封裝膜層、無機封裝膜層或有機/無機混合膜層。較佳地，四層封裝結構層26X1,26X2,26X3,26X4可為相同或不同材質，例如，封裝結構層26X1為無機封裝膜層，封裝結構層26X2為有機封裝膜層，封裝結構層26X3為無機封裝膜層，且封裝結構層26X4為有機封裝膜層；或是封裝結構層26X1為有機封裝膜層，封裝結構層26X2為無機封裝膜層，封裝結構層26X3為有機封裝膜層，且封裝結構層26X4為無機封裝膜層，但不以此為限。Please refer to Figure 10. FIG. 10 is a schematic view showing a flexible display panel according to a fourth embodiment of the present invention. As shown in FIG. 10, in the embodiment, the encapsulation film layer 26 of the flexible display panel 60 includes at least a first encapsulation film layer 261 and a plurality of multi-layer package structures 26X. The first encapsulation film layer 261 is disposed on the flexible substrate 22 and covers the display element 24. The multilayer package structure 26X is located on the first encapsulation film layer 261 and corresponds to at least one display element 24. The upper surface 261S of the first encapsulation film layer 261 is substantially a flat surface, and each trench 28 is located between adjacent multilayer package structures 26X, respectively. In this embodiment, the multi-layer package structure 26X includes, for example, four layers of package structure layers 26X1, 26X2, 26X3, and 26X4, but is not limited thereto. The first encapsulation film layer 261 can include organic An encapsulating film layer, an inorganic encapsulating film layer or an organic/inorganic hybrid film layer. The four-layer package structure layers 26X1, 26X2, 26X3, and 26X4 of the multi-layer package structure 26X may respectively include an organic encapsulation film layer, an inorganic encapsulation film layer, or an organic/inorganic hybrid film layer. Preferably, the four-layer package structure layers 26X1, 26X2, 26X3, and 26X4 may be the same or different materials. For example, the package structure layer 26X1 is an inorganic package film layer, the package structure layer 26X2 is an organic package film layer, and the package structure layer 26X3 is The inorganic encapsulation film layer, and the package structure layer 26X4 is an organic encapsulation film layer; or the package structure layer 26X1 is an organic encapsulation film layer, the package structure layer 26X2 is an inorganic encapsulation film layer, and the package structure layer 26X3 is an organic encapsulation film layer, and the package is The structural layer 26X4 is an inorganic encapsulating film layer, but is not limited thereto.
綜上所述，本發明之可撓式顯示面板具有包覆顯示元件的封裝膜層，且封裝膜層之上表面具有溝槽，可有效減少可撓式顯示面板在被外力撓曲時所產生的水平方向應力，因此可避免封裝膜層產生裂痕。如此一來，可大幅降低水氧入侵的機率，有效提升顯示元件的元件壽命。In summary, the flexible display panel of the present invention has an encapsulation film layer covering the display element, and the surface of the encapsulation film layer has a groove, which can effectively reduce the occurrence of the flexible display panel when being flexed by an external force. The horizontal direction of stress, thus avoiding cracks in the encapsulation layer. In this way, the probability of water and oxygen intrusion can be greatly reduced, and the component life of the display element can be effectively improved.
以上所述僅為本發明之較佳實施例，凡依本發明申請專利範圍所做之均等變化與修飾，皆應屬本發明之涵蓋範圍。The above are only the preferred embodiments of the present invention, and all changes and modifications made to the scope of the present invention should be within the scope of the present invention.
10‧‧‧可撓式顯示面板10‧‧‧Flexible display panel
12‧‧‧可撓式基板12‧‧‧Flexible substrate
14‧‧‧顯示元件14‧‧‧Display components
16‧‧‧封裝膜層16‧‧‧Encapsulated film
18‧‧‧水平方向應力18‧‧‧Horizontal stress
20‧‧‧裂痕20‧‧‧ crack
30‧‧‧可撓式顯示面板30‧‧‧Flexible display panel
22‧‧‧可撓式基板22‧‧‧Flexible substrate
24‧‧‧顯示元件24‧‧‧ Display elements
26‧‧‧封裝膜層26‧‧‧Encapsulated film
22D‧‧‧顯示區22D‧‧‧ display area
24R‧‧‧紅色顯示元件24R‧‧‧ red display component
24G‧‧‧綠色顯示元件24G‧‧‧Green display components
24B‧‧‧藍色顯示元件24B‧‧‧Blue display component
t‧‧‧厚度T‧‧‧thickness
28‧‧‧溝槽28‧‧‧ trench
26S‧‧‧上表面26S‧‧‧ upper surface
d‧‧‧深度D‧‧‧depth
29‧‧‧水平方向應力29‧‧‧Horizontal stress
30’‧‧‧可撓式顯示面板30’‧‧‧flexible display panel
30”‧‧‧可撓式顯示面板30”‧‧‧flexible display panel
24U‧‧‧顯示單元24U‧‧‧ display unit
40‧‧‧可撓式顯示面板40‧‧‧Flexible display panel
261‧‧‧第一封裝膜層261‧‧‧First encapsulation film
262‧‧‧第二封裝膜層262‧‧‧Second encapsulation film
261S‧‧‧上表面261S‧‧‧ upper surface
262S‧‧‧上表面262S‧‧‧ upper surface
50‧‧‧可撓式顯示面板50‧‧‧flexible display panel
26A‧‧‧最底層封裝膜層26A‧‧‧Bottom encapsulation film
26B‧‧‧中間層封裝膜層26B‧‧‧Intermediate encapsulation film
26C‧‧‧中間層封裝膜層26C‧‧‧Intermediate encapsulation film
26D‧‧‧最頂層封裝膜層26D‧‧‧ topmost encapsulation film
26DS‧‧‧上表面26DS‧‧‧ upper surface
td‧‧‧厚度Td‧‧‧ thickness
60‧‧‧可撓式顯示面板60‧‧‧flexible display panel
26X‧‧‧多層封裝結構26X‧‧‧Multilayer package structure
26X1‧‧‧封裝結構層26X1‧‧‧Package structure layer
26X2‧‧‧封裝結構層26X2‧‧‧Package structure layer
26X3‧‧‧封裝結構層26X3‧‧‧Package structure layer
26X4‧‧‧封裝結構層26X4‧‧‧Package structure layer
t2‧‧‧厚度T2‧‧‧ thickness
第1圖繪示了習知可撓式顯示面板之示意圖。FIG. 1 is a schematic view of a conventional flexible display panel.
第2圖繪示了本發明之第一實施例之可撓式顯示面板之上視示意圖。2 is a top plan view of a flexible display panel according to a first embodiment of the present invention.
第3圖繪示了第2圖之可撓式顯示面板之剖面示意圖。FIG. 3 is a cross-sectional view showing the flexible display panel of FIG. 2.
第4圖繪示了第3圖之可撓式顯示面板在撓曲狀態下的剖面示意圖。FIG. 4 is a cross-sectional view showing the flexible display panel of FIG. 3 in a flexed state.
第5圖與第6圖繪示了本發明之第一實施例之第一變化實施例之可撓式顯示面板之示意圖。5 and 6 are schematic views of a flexible display panel according to a first variation of the first embodiment of the present invention.
第7圖繪示了本發明之第一實施例之第二變化實施例之可撓式顯示面板之上視示意圖。FIG. 7 is a top plan view showing a flexible display panel according to a second modified embodiment of the first embodiment of the present invention.
第8圖繪示了第7圖之可撓式顯示面板之剖面示意圖。FIG. 8 is a cross-sectional view showing the flexible display panel of FIG. 7.
第9圖繪示了本發明之第二實施例之可撓式顯示面板之示意圖。FIG. 9 is a schematic view showing a flexible display panel according to a second embodiment of the present invention.
第10圖繪示了本發明之第三實施例之可撓式顯示面板之示意圖。FIG. 10 is a schematic view showing a flexible display panel according to a third embodiment of the present invention.
第11圖繪示了本發明之第四實施例之可撓式顯示面板之示意圖。11 is a schematic view showing a flexible display panel according to a fourth embodiment of the present invention.
40‧‧‧可撓式顯示面板40‧‧‧Flexible display panel
22‧‧‧可撓式基板22‧‧‧Flexible substrate
24‧‧‧顯示元件24‧‧‧ Display elements
26‧‧‧封裝膜層26‧‧‧Encapsulated film
22D‧‧‧顯示區22D‧‧‧ display area
24R‧‧‧紅色顯示元件24R‧‧‧ red display component
24G‧‧‧綠色顯示元件24G‧‧‧Green display components
24B‧‧‧藍色顯示元件24B‧‧‧Blue display component
t2‧‧‧厚度T2‧‧‧ thickness
28‧‧‧溝槽28‧‧‧ trench
d‧‧‧深度D‧‧‧depth
261‧‧‧第一封裝膜層261‧‧‧First encapsulation film
262‧‧‧第二封裝膜層262‧‧‧Second encapsulation film
261S‧‧‧上表面261S‧‧‧ upper surface
262S‧‧‧上表面262S‧‧‧ upper surface
Claims (8)
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| TW101142863A TWI492436B (en) | 2012-11-16 | 2012-11-16 | Flexible display panel |
| CN201310019240.1A CN103150965B (en) | 2012-11-16 | 2013-01-18 | Flexible display panel |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| TW101142863A TWI492436B (en) | 2012-11-16 | 2012-11-16 | Flexible display panel |
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| Publication Number | Publication Date |
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| TW201421759A TW201421759A (en) | 2014-06-01 |
| TWI492436B true TWI492436B (en) | 2015-07-11 |
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| Application Number | Title | Priority Date | Filing Date |
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| TW101142863A TWI492436B (en) | 2012-11-16 | 2012-11-16 | Flexible display panel |
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| CN (1) | CN103150965B (en) |
| TW (1) | TWI492436B (en) |
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| CN103150965A (en) | 2013-06-12 |
| TW201421759A (en) | 2014-06-01 |
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