TW200419486A - Display mirror - Google Patents
Display mirror Download PDFInfo
- Publication number
- TW200419486A TW200419486A TW92106557A TW92106557A TW200419486A TW 200419486 A TW200419486 A TW 200419486A TW 92106557 A TW92106557 A TW 92106557A TW 92106557 A TW92106557 A TW 92106557A TW 200419486 A TW200419486 A TW 200419486A
- Authority
- TW
- Taiwan
- Prior art keywords
- scope
- patent application
- item
- light
- electrode
- Prior art date
Links
Landscapes
- Electroluminescent Light Sources (AREA)
Abstract
Description
200419486 五、發明說明(l) 特別係關於一種具有產生 (一)、【發明所屬之技術領域】 本發明係關於一種顯示鏡, 資訊、影像功能之顯示鏡。 (二)、【先前技術】 、鏡子具有反射影像的功能,使其成為曰常生活中不可 ^缺的工具之一。近年來,工業界嘗試將鏡子與顯示哭姓 合,使得鏡子同時具有顯示影像以及反射影像之雙重功° 目前一般所使用的顯示鏡係於鏡面背後加上一發光二 極體(Light Emitting Diode, LED)。然而,由於整體影像 解析度不佳,使其無法應用於高資訊密度的影像顯示/且 由於發光二極體的發光晶粒模組化後,尺寸會變大,亦使 得顯示鏡喪失原本平面薄層化的特性。 此外’另一種顯示鏡係於鏡面背後加上一液晶顯示哭 (Uqui(i Crystal Display, LCD)。由於液晶顯示器本身^斤 灌注的液晶分子並不發光,必須靠著背面外加一背光源才 能發光顯像,所以其發光效率、對比度、視角並不理想; 並且,由於液晶顯示器結構複雜,且需搭配背光源、彩色 濾光片以及偏光板等材料,導致成本比較高。 再者,ik著應用領域的擴大以及傳輸資訊内容的增 加,目前所使用之具有顯示功能的鏡子已無法符合影像解 析度以及資汛含ϊ的要求。有鑑於此,目前亟需一新的顯 示鏡以解決上述傳統技術的缺點。 ’200419486 V. Description of the invention (l) In particular, the invention relates to a display mirror having a function of generating (a), [the technical field to which the invention belongs]. (2) [Previous technology] The mirror has the function of reflecting images, making it one of the indispensable tools in daily life. In recent years, the industry has tried to combine the mirror with the display cry, so that the mirror has the dual function of displaying images and reflecting images. At present, the display mirrors generally used are behind the mirror and a light emitting diode (Light Emitting Diode, LED). However, due to the poor resolution of the overall image, it cannot be applied to high-density image display / and due to the modularization of the light-emitting diodes of the light-emitting diode, the size will become larger and the display mirror will lose its original flatness Layered properties. In addition, 'another display mirror is attached to the back of the mirror with a liquid crystal display (Uqui (i Crystal Display, LCD). Because the liquid crystal display itself is filled with liquid crystal molecules that do not emit light, you must rely on a backside plus a backlight source to emit light. Display, its luminous efficiency, contrast, and viewing angle are not ideal; and because of the complex structure of the liquid crystal display, and the need to match materials such as backlight, color filters and polarizing plates, the cost is relatively high. Furthermore, ik is used in applications With the expansion of the field and the increase in the content of transmitted information, the currently used mirrors with display functions are no longer able to meet the requirements of image resolution and information. In view of this, a new display mirror is urgently needed to solve the above-mentioned traditional technology. Shortcomings. '
200419486200419486
本於積極發明之精神,亟思一種可 顯不鏡」,幾經研究實驗終至完成此 五、發明說明(2) 發明人爰因於此 以解決此項課題之「 項嘉惠世人之發明。 、二)、【發明内容】 的係提供一種具有顯示 反射層之鏡面板與顯示 有鑑於上述課題,本發明之目 功能之顯示鏡。 ^ 本發明之特徵係將具有透光性 器的平面化結構相結合。 含-達上述㈣,依據本發明之-種顯示鏡,包 二及: ;、—第一電極、-第二電極、-有機i光; 第-表面相對之一第二表而土ϊ係具有一第一表面以及與 第—表面上;[電面’第-電極係位於透明基板之 係位於該第一 位:第一電極之上;,機發光部 板之第二表面相結合。—電極之間,鏡面板係與透明基 與—具有彡光性&射^^示鏡係將有㈣激發光顯示器 光時,顯示鏡即具有i干ϊ面板相結合。#有機發光部發 發光部不發光時,顯示鎊;面的功能;另一方面’當有機 技術相比,本發明整合卩具有反射影像的功能。與習知 構’使得顯示鏡同時具右f射鏡面與顯不器的平面化結 能,不僅延伸了目前鏡示功能以及反射影像之雙重功 操作上的便利性。並且,的應用範圍,同時亦增加使用者 顯示鏡不僅製程簡單,而且整體Based on the spirit of active invention, I want to think about a kind of invisible mirror. After several research experiments, I have completed this. 5. Description of the invention (2) The inventor has therefore solved the problem of "the invention of the people who benefited from the world". (2) and [Summary of the Invention] The present invention provides a mirror panel having a display reflective layer and a display mirror having a function of the objective of the present invention in view of the above-mentioned problems. ^ The feature of the present invention is a planar structure with a light transmitting device Including-up to the above, according to the present invention-a display mirror, including two and:;,-a first electrode,-a second electrode,-organic light; the first surface is opposite to the second surface The system has a first surface and a first surface; [the electrical surface 'the first-electrode system is located on the transparent substrate is located in the first position: above the first electrode; and the second surface of the light-emitting part board is combined ——— between the electrodes, the mirror panel system and the transparent base and—has the light-emitting property & the light-emitting display system will combine the display light with the excitation light, the display mirror will have an i-dried panel. #Organic light-emitting part When the light-emitting part does not emit light, pounds are displayed; Functions; on the other hand, when compared with organic technology, the present invention integrates the function of reflecting images. Compared with the conventional structure, the display mirror has both the right f-ray mirror surface and the flattened junction energy of the display, which not only extends the current Mirror display function and the convenience of the dual power operation of the reflected image. Moreover, the scope of application also increases the user's display mirror is not only simple in manufacturing process, but also overall
I 200419486 五、發明說明(3) ~ ---- 成本的增加亦不高,對於實際商品化的應用極為合適。 (四)、【實施方式】 以下將參照相關圖式,說明依據本發明較佳實施例之 顯示鏡。 如圖1所示’依據本發明較佳實施例之一 包含-透明基板"、一第一電極12、一有機發二'一 第二電極14以及一鏡面板15。其中,透明基板u係具有一 第一表面ill以及與第一表面丨丨1相對之一第二表面112 ;第 一電極12係位於透明基板丨丨之第一表面ui上;第二電極14 係位於第一電極12之上;有機發光部13係位於第一電極12 與第二電極14之間;鏡面板15係與透明基板11之第二表面 11 2相結合。 本貫施例之透明基板1 1係具有一第一表面1 1 1以及與第 一表面1.11相對之一第二表面11 2。於此,透明基板丨1可以 是一柔性(f 1 ex i b 1 e )基板或一剛性(r丨g i d)基板。同時, 透明基板亦可以是一塑膠(plastic)基板或是一玻璃基 板。其中,柔性基板與塑膠基板可為一聚碳酸酯 (p〇lycarb〇nate,PC)基板、一聚 _ (p〇iyester,pET)基 板、一環稀共聚物(cyclic olefin copolymer,C0C)基板 或一金屬鉻合物基材一環細共聚物(metallocene- based cyclic olefin copo 1 ymer, mCOC )基板 〇 如圖1所示,第一電極1 2係位於透明基板11之第一表面 111上。於本實施例中,第一電極1 2係利用濺鍍I 200419486 V. Description of the invention (3) ~ ---- The cost increase is not high, which is very suitable for the actual commercial application. (IV) [Embodiment] A display mirror according to a preferred embodiment of the present invention will be described below with reference to related drawings. As shown in FIG. 1 'according to one of the preferred embodiments of the present invention, it includes-a transparent substrate, a first electrode 12, an organic electrode, a second electrode 14, and a mirror panel 15. Among them, the transparent substrate u has a first surface ill and a second surface 112 opposite to the first surface 丨 1; the first electrode 12 is located on the first surface ui of the transparent substrate 丨; the second electrode 14 is It is located on the first electrode 12; the organic light emitting portion 13 is located between the first electrode 12 and the second electrode 14; the mirror panel 15 is combined with the second surface 112 of the transparent substrate 11. The transparent substrate 11 of this embodiment has a first surface 1 1 1 and a second surface 112 opposite to the first surface 1.11. Here, the transparent substrate 1 may be a flexible (f 1 ex i b 1 e) substrate or a rigid (r 1 g i d) substrate. At the same time, the transparent substrate can also be a plastic substrate or a glass substrate. Among them, the flexible substrate and the plastic substrate may be a polycarbonate (PC) substrate, a polyester (PET) substrate, a cyclic olefin copolymer (C0C) substrate, or a A metallocene-based cyclic olefin copo 1 ymer (mCOC) substrate. As shown in FIG. 1, the first electrode 12 is located on the first surface 111 of the transparent substrate 11. In this embodiment, the first electrodes 12 are formed by sputtering.
200419486 五、發明說明(4) (sputtering)方式或是離子電鍍(i〇n piating)方式形 成於透明基板11上。在此,第一電極12通常作為陽極且其 材質通常為一透明的可導電之金屬氧化物,例如氧化銦錫 (ΙΤ0)、氧化鋁鋅(ΑΖ0)或是氧化銦辞(ΙΖ0)。 另外,本實施例中之有機發光部1 3係位於第一電極1 2 與第二電極14之間。其中,有機發光部13通常包含一電洞 電子傳遞層以及 注入層、一電洞傳遞層、一發光層 電子注入層(圖中未顯示)。電洞注入層的主要材料為 copper phthalocyanine (CuPc),電洞傳輸層的材料主要 係為4, 4 -bis[N-(l-naphthyl)-N-phenylamino]biphenyl (NPB ) ’電子注入層的材料主要係為氟化鐘(LiF),電 aluminum ( A lq ),而且有機發光部13係利用蒸鍍 (evaporation)、旋轉塗佈(Spin coating)、喷墨印刷 (lnk jet printing)或是印刷(printing)等方式形成 於電極1 2之上。此外,有機發光部丨3所發射的光線可 為監光、綠光、紅光、白光、其他的單色光或單色光組合 成之彩色光。 再請參考圖1 ’第二電極1 4係位於第一電極1 2之上。於 此第二電極14係使用蒸鍍或是濺鍍(sputtering )等方 $形成於有機發光部丨3之上。另外,第二電極1 4的材質可 :’、、铭約或疋鎮銀等金屬或金屬合金。當然,第二電極j 4 的材質亦可為鋁/氟化鋰或是銀。 另外’再請參考圖1,鏡面板丨5係與透明基板丨丨之第二200419486 V. Description of the invention (4) The (sputtering) method or the ion plating method is formed on the transparent substrate 11. Here, the first electrode 12 is usually used as an anode and its material is usually a transparent conductive metal oxide, such as indium tin oxide (ITO), aluminum zinc oxide (AZO), or zinc oxide (IZO). In addition, the organic light emitting portion 13 in this embodiment is located between the first electrode 12 and the second electrode 14. Wherein, the organic light emitting portion 13 generally includes a hole electron transfer layer and an injection layer, a hole transfer layer, and a light emitting layer electron injection layer (not shown in the figure). The main material of the hole injection layer is copper phthalocyanine (CuPc), and the material of the hole transport layer is mainly 4, 4, -bis [N- (l-naphthyl) -N-phenylamino] biphenyl (NPB). The materials are mainly fluorinated bell (LiF), electrical aluminum (A lq), and the organic light-emitting part 13 uses evaporation, spin coating, inkjet printing, or printing. (Printing) is formed on the electrode 12. In addition, the light emitted by the organic light emitting section 3 may be a monitor light, a green light, a red light, a white light, other monochromatic light or a combination of monochromatic light. Please refer to FIG. 1 again. The second electrode 14 is located on the first electrode 12. Here, the second electrode 14 is formed on the organic light-emitting portion 3 by evaporation, sputtering, or the like. In addition, the material of the second electrode 14 may be a metal or a metal alloy such as ′, 约, or sintered silver. Of course, the material of the second electrode j 4 may also be aluminum / lithium fluoride or silver. In addition, please refer to FIG. 1 again, the second of the mirror panel 丨 5 and the transparent substrate 丨 丨
第10頁 200419486 五、發明說明(5) 表面U2相結合。其中,鏡面板15包含一透光板151及一透 光性反射層152,且透光性反射層152係形成於透光板151 上。如圖1所示,透光性反射層1 5 2係與透明基板11之第二 表面11 2相結合。另外,如圖2所示,透光板1 5 1亦可介於透 光性反射層1 5 2以及透明基板11之間。 於本實施例中,結合的方式係可以利用黏合膠黏合, 亦可以利用一外加固定元件(未顯示於圖中)固定鏡面板15 與透明基板11的相對位置。於此,鏡面板的面積尺寸以 及形狀可依照應用所需而做調整。 於本實施例中,透光性反射層1 52係利用蒸鍍、濺鍍、 離子電鍍或是貼附方式形成於透光板丨5 1。於本實施例中, 透光性反射層152的材質係為金屬或是介電材料。另外,透 光性反射層152的透光率約為1〇%至9〇%。 請參照圖3A或圖3B,於本發明中,當有機發光部丨3發 光時,使用者眼睛所看到的是顯示鏡1所顯示的晝面,如文 字、圖案或是影像等。另外一方面,當有機發光部13不發 光時,使用者的眼睛所看到的是反射鏡面,亦即使用者端 背景的反射影像。 當然,本發明的實際應用亦可作適當的調整。如圖3a 所不,當鏡面板15的面積大於有機發光層13的面積時,使 用者在使用鏡面功能時,亦可同時看到顯示晝面。例如, 當使用者在使用化妝台時,亦可於某些部分同時觀看電視 節目(如新聞)的晝面,如圖3B所示。由於有機電激發光 (Orgamc Electr〇luminescence,〇EL)顯示器並無視角Page 10 200419486 V. Description of the invention (5) Surface U2 is combined. The mirror panel 15 includes a light-transmitting plate 151 and a light-transmitting reflective layer 152, and the light-transmitting reflective layer 152 is formed on the light-transmitting plate 151. As shown in FIG. 1, the light-transmitting reflective layer 15 2 is combined with the second surface 112 of the transparent substrate 11. In addition, as shown in FIG. 2, the light-transmitting plate 1 5 1 may be interposed between the light-transmitting reflective layer 1 5 2 and the transparent substrate 11. In this embodiment, the bonding method may be an adhesive bonding, or an additional fixing element (not shown) may be used to fix the relative position of the mirror panel 15 and the transparent substrate 11. Here, the area size and shape of the mirror panel can be adjusted according to the application requirements. In this embodiment, the light-transmitting reflective layer 152 is formed on the light-transmitting plate 51 by evaporation, sputtering, ion plating, or attaching. In this embodiment, the material of the translucent reflective layer 152 is a metal or a dielectric material. The light transmittance of the light-transmitting reflective layer 152 is about 10% to 90%. Please refer to FIG. 3A or FIG. 3B. In the present invention, when the organic light emitting part 3 emits light, what the user sees is the daylight surface displayed by the display mirror 1, such as a text, a pattern, or an image. On the other hand, when the organic light-emitting portion 13 is not emitting light, what the user's eyes see is a reflective mirror surface, that is, a reflected image of the background on the user's side. Of course, the actual application of the present invention can also be adjusted appropriately. As shown in Fig. 3a, when the area of the mirror panel 15 is larger than the area of the organic light emitting layer 13, when the user uses the mirror surface function, he can also see the display daylight surface at the same time. For example, when a user is using a dressing table, he can also watch the daytime surface of a television program (such as news) at some parts at the same time, as shown in FIG. 3B. Because organic electroluminescence (Orgamc ElectrOluminescence, oEL) displays have no viewing angle
第11頁 200419486 五、發明說明(6) 的限制’此一優點更增加顯示鏡1的實際應用範圍。 另外’如圖4A及圖4B所示,本發明中第二實施例亦提 供一種顯示鏡2,包含一透明基板21、一第一電極22、一有 機發光層23、一第二電極24以及一鏡面板25。其中,透明 基板21係具有一第一表面211以及與第一表面211相對之一 第二表面212 ;第一電極22係位於透明基板21之第一表面 211上;第二電極24係位於第一電極22之上;有機發光部23 係位於第一電極2 2與第二電極2 4之間;鏡面板2 5係鄰設於 透明基板21之第二表面212。Page 11 200419486 V. Limitations of the invention description (6) ′ This advantage further increases the practical application range of the display mirror 1. In addition, as shown in FIG. 4A and FIG. 4B, the second embodiment of the present invention also provides a display mirror 2 including a transparent substrate 21, a first electrode 22, an organic light emitting layer 23, a second electrode 24, and a Mirror panel 25. Among them, the transparent substrate 21 has a first surface 211 and a second surface 212 opposite to the first surface 211; the first electrode 22 is located on the first surface 211 of the transparent substrate 21; the second electrode 24 is located on the first Above the electrode 22; the organic light emitting portion 23 is located between the first electrode 22 and the second electrode 24; the mirror panel 25 is adjacent to the second surface 212 of the transparent substrate 21.
本實施例中之元件與顯示鏡1之相同元件,其特徵及功 能皆相同,在此不再贅述。 於本實施例中,鏡面板25係鄰設於透明基板21之第二 表面2 1 2,且鏡面板2 5與透明基板2 1的相對位置係利用一固 定元件(未示於圖)固定。其中,鏡面板25包含一透光板251 及一透光性反射層2 5 2,且透光性反射層2 5 2係形成於透光 板251上。如圖4A所示,透光性反射層2 5 2係鄰設於透明基 板21之第二表面212。如圖4B所示,透光板251係介於透光 性反射層2 5 2以及透明基板21之間。The elements in this embodiment are the same as those of the display mirror 1, and their features and functions are the same, which will not be repeated here. In this embodiment, the mirror panel 25 is adjacent to the second surface 2 1 2 of the transparent substrate 21, and the relative position of the mirror panel 25 and the transparent substrate 21 is fixed by a fixing element (not shown). The mirror panel 25 includes a light-transmitting plate 251 and a light-transmitting reflective layer 2 5 2. The light-transmitting reflective layer 2 5 2 is formed on the light-transmitting plate 251. As shown in FIG. 4A, the light-transmitting reflective layer 2 5 2 is adjacent to the second surface 212 of the transparent substrate 21. As shown in FIG. 4B, the light-transmitting plate 251 is interposed between the light-transmitting reflective layer 2 5 2 and the transparent substrate 21.
本發明之顯示鏡係將有機電激發光顯示器與一具有透 光性反射層之鏡面板相結合。當有機發光部發光時,顯示 鏡即具有顯示晝面的功能;另一方面,當有機發光部不發 光時,顯示鏡即具有反射影像的功能。與習知技術相比, 本發明整合了反射鏡面與顯示器的平面化結構,使得顯示 鏡同時具有顯示功能以及反射影像之雙重功能,不僅延伸The display mirror of the present invention combines an organic electroluminescent display with a mirror panel having a light-transmitting reflective layer. When the organic light-emitting portion emits light, the display mirror has a function of displaying the day surface; on the other hand, when the organic light-emitting portion does not emit light, the display mirror has a function of reflecting an image. Compared with the conventional technology, the present invention integrates the planar structure of the reflective mirror surface and the display, so that the display mirror has the dual functions of a display function and a reflected image, which not only extends
第12頁 200419486Page 12 200419486
第13頁 200419486 圊式簡單說明 (五)、【圖式簡單說明】 圖1係為本發明中第一實施例之顯示鏡的示意圖; 圖2係為本發明中第一實施例之顯示鏡的另一示意圖; 圖3A與圖3B係為本發明中第一實施例之顯示鏡具體實 施的示意圖;以及 圖4A及圖4B係本發明中第二實施例之顯示鏡的示意 圖。 元件符號說明: 1 顯示鏡 11 透明基板 111 第一表面 112 第二表面 12 第一電極 13 有機發光部 14 第二電極 15 鏡面板 151 透光板 152 透光性反射層 2 顯示鏡 21 透明基板 211 第一表面 212 第二表面 22 第一電極Page 13 200419486 Simple description (five), [simple illustration] Figure 1 is a schematic diagram of the display mirror of the first embodiment of the present invention; Figure 2 is a schematic view of the display mirror of the first embodiment of the present invention Another schematic diagram; FIG. 3A and FIG. 3B are schematic diagrams of the specific implementation of the display mirror of the first embodiment of the present invention; and FIG. 4A and FIG. 4B are schematic diagrams of the display mirror of the second embodiment of the present invention. Description of component symbols: 1 display mirror 11 transparent substrate 111 first surface 112 second surface 12 first electrode 13 organic light emitting portion 14 second electrode 15 mirror panel 151 light transmitting plate 152 light reflecting layer 2 display mirror 21 transparent substrate 211 First surface 212 Second surface 22 First electrode
第14頁Page 14
200419486200419486
第15頁Page 15
Claims (1)
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
TW92106557A TWI232419B (en) | 2003-03-24 | 2003-03-24 | Display mirror |
JP2004080107A JP2004288635A (en) | 2003-03-20 | 2004-03-19 | Display mirror |
US10/803,962 US20040196420A1 (en) | 2003-03-20 | 2004-03-19 | Display apparatus with mirror function |
KR1020040018678A KR20040082984A (en) | 2003-03-20 | 2004-03-19 | Display mirror |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
TW92106557A TWI232419B (en) | 2003-03-24 | 2003-03-24 | Display mirror |
Publications (2)
Publication Number | Publication Date |
---|---|
TW200419486A true TW200419486A (en) | 2004-10-01 |
TWI232419B TWI232419B (en) | 2005-05-11 |
Family
ID=36320025
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
TW92106557A TWI232419B (en) | 2003-03-20 | 2003-03-24 | Display mirror |
Country Status (1)
Country | Link |
---|---|
TW (1) | TWI232419B (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN114903326A (en) * | 2022-05-05 | 2022-08-16 | 苏州清越光电科技股份有限公司 | Intelligent mirror that can multistate switch |
-
2003
- 2003-03-24 TW TW92106557A patent/TWI232419B/en not_active IP Right Cessation
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN114903326A (en) * | 2022-05-05 | 2022-08-16 | 苏州清越光电科技股份有限公司 | Intelligent mirror that can multistate switch |
Also Published As
Publication number | Publication date |
---|---|
TWI232419B (en) | 2005-05-11 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US9304354B2 (en) | Light-emitting modules and lighting modules | |
GB2545097B (en) | Display device and method for manufacturing the same | |
TW201629586A (en) | Display device and electronic device | |
CN103913889B (en) | Liquid crystal display device with built-in light source | |
TW200422992A (en) | Dual-screen organic electroluminescent display | |
TW200929120A (en) | Display system with a solar cell and device having the same | |
US20070057881A1 (en) | Transflective display having an OLED region and an LCD region | |
CN109671735B (en) | Quantum dot display substrate, manufacturing method thereof and display device | |
CN101373576B (en) | Image display system | |
CN106158913B (en) | double-sided touch OLED display panel | |
TW200821681A (en) | Back light unit | |
TW200907905A (en) | System for displaying image | |
TWI396151B (en) | Display device and electrical apparatus | |
CN100474041C (en) | Composite display device | |
US20060139524A1 (en) | Portable multifunction display panel and a liquid crystal display device adopting the same | |
CN105321977A (en) | Organic light-emitting diode display panel and organic light-emitting diode display apparatus | |
TWI230305B (en) | Dual mode liquid crystal display | |
TWI284491B (en) | Flat display panel | |
TW200419486A (en) | Display mirror | |
TWI299634B (en) | Dual emission organic electroluminescent device | |
JPWO2015083483A1 (en) | Surface emitting unit | |
CN113345864A (en) | Driving backboard and micro light-emitting diode display panel | |
TWI308466B (en) | Dual emission organic electroluminescent device | |
JP2004288635A (en) | Display mirror | |
TW200428314A (en) | Electrical device with auxiliary light |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
MM4A | Annulment or lapse of patent due to non-payment of fees |