519668 A7 _____B7 五、發明説明（1 ) <發明所屬技術領域> 本發明係關於一種雙平面真空螢光顯示裝置，係在前 面基板及背面基板之兩基板形成陽極電極。 <習知之技術> 第5(a)圖為習知之雙平面真空螢光顯示裝置之透視 圖’第5(b)圖為圖（a)之Χ-χ部分之截面圖。 41為背面基板、42為前面基板、431〜433為側面板、 44及46為塗敷螢光体於陽極電極之陽極、仏及叨為柵極、〜 48為陰極用之鎢絲。 雙平面真空螢光顯示裝置，係由前面基板42的外側觀 察陽極44、46的發光之雙平面真空螢光顯示裝置。 陽極44與栅極45、陽極46與栅極47係形成各對，在兩 對藉由共通之鎢絲48之電子，各個進行獨立之顯示。例如， 陽極46係以7段型式進行數值顯示，以套圈輪狀型式進行模 擬顯示。如此雙平面真空螢光顯示裝置之2對之陽極與柵 極，動作宛如獨立之2個雙平面真空螢光顯示裝置。從而， 雙平面真空螢光顯示裝置，係構成可以各個明瞭視認陽極 44及陽極46的發光。 螢光顯示裝置由於係使用低速電子，所以在螢光体的 表面附近發光。為此，在雙平面真空螢光顯示裝置中，陽 極44的發光可以直接觀察，但陽極牝的發光係形成觀察透 過螢光體而來的光（形成由裡面觀察螢光体的正面的發 光）。在前面基板42的外側之觀察者，可以明顯的看到陽極 44方面的發光。 本紙張尺度適用中國國家標準（CNS) A4規格（21〇><297公楚） 4 ----------------------… (請先閲讀背面之注意事項再填寫本頁) 訂· 519668 A7 B7 五、發明説明（2 <發明欲解決之課題> 本發明係以提供一種雙平面真空螢光顯示裝置為目 的，在雙平面真空螢光顯示裝置中，2個之陽極的内、背面 土板之陽極（♦面險極），係作為對於前面基板之陽極（前面 基板）的顯示之背景效果的創出用，亦即利用作為逆光的效 果之創出用，顯眼前面陽極的顯示，或可以豐富其顯示的 表現内容之構造。 然而，習知之雙平面真空螢光顯示裝置係構成可以明 瞭的視認前面、背面兩陽極的顯示。從而，背面陽極的顯 不之套官輪狀與圓點狀之發光，可以各別的明瞭視認無 法有效果的作為背景顯示。另外，如前所述，背面陽極= 發光形成比前面陽極的發光還明亮，無法有效果的作為背 景顯示。 本發明鑒於諸點，以提供一種雙平面真空螢光顯示裝 置，適於在前述基板賦予光之散亂機能之背景效果的創出 之構造為目的。 <解決課題的手段> 本發明係一種雙平面真空螢光顯示裝置，其中包含 有·則面基板’係在其内面形成塗敷螢光体之陽極電極； 背面基板’係在其内面形成塗敷螢光体之陽極電極；及， 陰極，係配設於兩基板之間；又前述基板的内面為粗面。 本發明係在前述雙平面真空螢光顯示裝置，其中形成 於刖面基板之陽極電極，係由透明導電材所形成。 本發明係在雙平面真空螢光顯示裝置，其中形成於前 本紙張尺度適用中國國豕標準（CNS) A4規格（210X297公爱） (請先閲讀背面之注意事項再填寫本頁) .裝丨 、一叮| :線丨 519668 A7 B7 五、發明説明（ 面基板之陽極電極，係由非透光性導電材所形成，並具有 透過性。 本發明係在雙平面真空螢光顯示裝置，其中在由形成 於刚面基板内面之透明絕緣材所形成之平滑化層形成陽極 電極。 <發明的實施型態> 第1圖為關於本發明之實施型態之雙平面真空螢光顯 示裝置之截面圖，圖（a)為表示相當於第5(a)圖之X-A部分 的截面圖，第1(b)圖為表示第i(a)圖之虛線所包圍部分19 之擴大圖。 11為玻璃之背面基板、12為玻璃之前面基板、121為前 面基板12的内面、13為玻璃之側面板、14為陽極、15為柵 極、16為陽極、17為柵極、18為陰極用之鎢絲。 陽極14係構成套圈輪型式，陽極16係構成7段型式。 前面基板12之内面，係藉後述之喷砂（san(nast)等，如 第1 (b)圖所述形成凹凸粗面化。在該粗面化之内面121，形 成構成陽極段之陽極電極161，在每段塗敷螢光体162。陽 極電極161係由ITO等之透明導電材所形成，或在鋁等之導 電材膜（非透光性導電材膜）可以形成切口、孔等。此種場 合，螢光体162的發光透過其切口，構成放射至前面基板12 的外側。 在此，藉第3圖說明前面基板與背面基板11的發光。 塗敷於背面基板11之陽極電極141之螢光体142發光之光， 本紙張尺度適用中國國家標準（CNS) Α4規格（210X297公釐） 6 (請先閲讀背面之注意事項再墦ίί本頁) •訂— -------_B7_ 五、發明説明（4 ) 係如第3H圖在前面基板12的内面121—面具有多少擴充一 面直進，在内面121的粗面如hi、h2、h3散亂成多方向。從 而’前面基板12的外側的觀察者，由於形成觀察背面基板 11的螢光体142發光之光的散亂光，所以觀察者無法僅觀察 陽極電極141的個別之發光，形成鄰接陽極電極之散亂光也 同時觀察到。為此，各陽極電極141之發光境界變成不明 顯，全面形成均一的圓滑之背景顯示。 另一方面，前面基板12之陽極電極161及螢光体162, 由於係形成密著於前面基板12的内面121，所以觀察者幾乎 不受内面121的散亂的影響，可以觀察螢光体162的發光。 從而’前面基板12的外側觀察者，係以背面基板^的 陽極之散亂光作為背景，形成觀察前面基板12的陽極之顯 7f\ 0 背面基板11的螢光体142,係藉任意的組合（最好至少2 色（2種類）以上）發光色紅（R)、綠（G)、藍（B)，可以創出所 希望之背景顏色。 第2圖為在形成於前面基板12之陽極的實施型態之截 面圖，為相當於第1(b)圖之部分擴大圖。 第2(a)圖為在前面基板12的内面121，將透明之絕緣材 例如由玻璃所形成之平滑化層163形成平坦狀（平面狀），在 其平滑化層163形成陽極電極16卜平滑化層163 ,係為了平 滑化内面121的粗面，螢光体162的發光之散亂的影響變成 比第1(b)圖的場合還小。 第2(b)圖係前面基板丨2的内面，藉透明導電材例如 本紙張尺度適用中國國家標準（CNS) A4規格（210X297公爱） 519668 A7 _______F7_ 五、發明説明（5 ) ITO(indium tin oxide)等，將陽極電極164形成平坦狀，或 或形成型式狀，在其陽極電極164塗敷螢光体162。陽極電 極164 ’係與第2(a)圖的平滑化層163 —樣，平滑化内面121 的粗面。從而在該場合，陽極電極164由於也兼具有作為平 滑化之機能，所以構造形成比第2(a)圖的場合還簡單。 在前述實施型態中，前面基板及背面基板之陽極的型 式’已針對分別7段及套圈輪狀者加以說明，但並不限制於 此等之型式，即使使用於符號、圓點、圖表等之習知之螢 光顯示裝置亦可。 ％ 另外，背面基板之陽極的顯示，係不僅紅（R)、綠（(3)、 監（B)之各單色顯示與使彼等組合2色以上之顯示，即使賦 予濃淡色（例如，參照關於本申請人之申請之曰本特願 2000-219964號）亦可，另外不僅單單的組合顏色，即使有 意義之顯示亦可。 而且，前面基板之内面的粗面化，即使實施於前面基 板之全面亦可，僅實施於顯示領域亦可。 另外，背面基板之陽極即使設置於背面基板之全面亦 可’即使設置於顯示領域之全部或一部亦可。 在前述實施型態中之前面基板，係藉粗面化内面，並 也具有與習知之中性濾光片（netural densityfiher)同樣之機 能。亦即習知之雙平面真空螢光顯示裝置之前面基板，由 於係使用透明之玻璃板，所以由外部可以清楚的看到螢光 顯示裝置内部之各項零件，且藉由金屬的配線與陽極電極 等、或由螢光体之反射光降低反差，視認性降低。在此， 本紙張尺度適用中國國家標準（CNS) A4規格（210X297公釐） (請先閲讀背面之注意事項再填寫本頁) .訂. 519668 —~~------_ 五、發明説明（ό ) ι知係將中性滤光片另外設置，防止反差之降低，但本發 明沒有必要設置其中性濾光片。 另外，配線、陽極電極等之金屬光澤，係在前面基板 的粗面散亂，呈現白色或乳白色，非發光時之螢光体的體 色為白色，同時在全體呈現不耀眼之穩定之白色。其結果， 本發明之雙平面真空螢光顯示裝置提升與前述反差的提升 之相互視認性。 其次，在前述實施型態中，針對前面基板12之内面121 的粗面化加以說明。 在前面基板12之内面121，由於直接形成鋁等之配線與 陽極電極等，所以内面121的粗度係考慮配線等之膜厚，選 定在對配線的形成與配線等之電氣的導通不造成障礙之範 圍。 第4圖為粗面化玻璃基板的内面，在其粗面化之内面， 在形成膜厚l#m程度之鋁的配線等場合中，表示其粗面之 算術平均粗度（Ra)與配線等之抵抗值之上升率的關係。配 線等之膜厚相同的場合，粗面之算術平均粗度（Ra)越變越 大，從而粗面也越變越粗，配線等之抵抗值得上升率變得 越大。 本實施型態係選定内面121之算術平均粗度（Ra)在 1000A以下。内面121之適當粗度因配線等膜厚而互異，但 在程度的場合，算術平均粗度(Ra)選定在8〇〇a以下， 希望的是可以在500〜300A程度。 本實施型態係選定内面121之算術平均粗度（Ra)在 本紙張尺度適用中國國家標準（CNS) A4規格（210X297公釐） 9 .......................裝：...............-、可....................--緣 (請先閲讀背面之注意事項再填寫本頁) 519668 A7 ___ _B7_ 五、發明説明（7 ) 1000A以下’但是若配線等之膜厚變厚的話，亦可以使其 在1000A以上（若配線等之電氣導通沒有障礙的話即可）。亦 即對應算術平均粗度（Ra)改變配線等之膜厚。 另外，前面基板12之内面121的粗面化，係藉喷砂、化 學研磨等來進行，但喷砂的場合亦可使用粒度#2〇〇〇〜# 600(JIS)之紹，希望的是可以使用粒度# 2000〜#8〇〇之铭。 <發明的效果> 本發明係藉所謂粗面化簡單的構成雙平面真空顯示裝 置之刖面基板的内面，不損及前面基板之陽極的顯示之視 認性，可以將背面基板之陽極（背面陽極）的顯示利用於背 景效果之創出。亦即藉粗面化前面基板的内面，前面陽極 的顯示之明瞭性幾乎不降低，但是背面陽極之顯示的明瞭 性降低’套圈輪狀與圓點狀等之發光之境界變成不明瞭， 由於形成難於各個視認，所以形成全面均一之圓滑之背景 顯示。從而，本發明藉由改變背面陽極之型式與塗敷營光 体之種類塗敷方法等，由於·可以創出種種不同之背景顯 示’所以可以豐富前面陽極的顯示之顯示内容，可以擴大 雙平面真空螢光顯示裝置之用途。 另外，在習知之雙平面真空螢光顯示裝置中，在前面 基板的外側之觀察者，背面陽極的顯示比前面陽極的顯示 可以更清楚的看見，本發明藉前面基板的内面之粗面面也 改善了該點。 本發明之前面基板，係藉粗面化内面，由於也兼具有 習知之中性濾光片之機能，所以在另外不設率光片，提升 本紙張尺度適用中國國家標準（CMS) A4規格（210X297公釐） · 1〇 · -----------------------..... (請先閲讀背面之注意事項再填窃本頁) .訂· -¾. 19…擴大圖示部分 12卜··前面基板的内面 141、 161…陽極電極 142、 162···螢光体 163···平滑化層 164···透明的陽極電極 519668 A7 B7 五、發明説明（9 ) 元件標號對照 11…玻璃的背面基板 12…玻璃的前面基板 13…玻璃的側面板 14、 16···陽極 15、 17…拇極 18…陰極用鎢絲 (請先閲讀背面之注意事項再填寫本頁) 、可| 本紙張尺度適用中國國家標準（CNS) A4規格（210X297公釐） _ 12 _519668 A7 _____B7 V. Description of the invention (1) < Technical field to which the invention belongs > The present invention relates to a dual-plane vacuum fluorescent display device. An anode electrode is formed on two substrates of a front substrate and a back substrate. < Known technology > Fig. 5 (a) is a perspective view of a conventional dual-plane vacuum fluorescent display device. Fig. 5 (b) is a cross-sectional view of the X-χ portion of Fig. (a). 41 is a back substrate, 42 is a front substrate, 431 to 433 are side panels, 44 and 46 are anodes coated with a phosphor on the anode electrode, rhenium and rhenium are grid electrodes, and 48 are tungsten wires for the cathode. The dual-plane vacuum fluorescent display device is a dual-plane vacuum fluorescent display device in which the anodes 44 and 46 emit light as viewed from the outside of the front substrate 42. Each of the anode 44 and the grid 45, and the anode 46 and the grid 47 is formed as a pair. In the two pairs, the electrons of the tungsten wire 48 in common are used for independent display. For example, the anode 46 is numerically displayed in a 7-segment pattern and simulated in a ferrule-type pattern. In this way, the two pairs of anodes and grids of the dual-plane vacuum fluorescent display device behave like two independent dual-plane vacuum fluorescent display devices. Therefore, the bi-planar vacuum fluorescent display device is configured to clearly recognize the light emission of the anode 44 and the anode 46, respectively. Since the fluorescent display device uses low-speed electrons, it emits light near the surface of the phosphor. For this reason, in the dual-plane vacuum fluorescent display device, the light emission of the anode 44 can be directly observed, but the light emission system of the anode ytterbium is formed to observe the light transmitted through the phosphor (to form the luminescence of the front surface of the phosphor viewed from the inside). . The observer on the outside of the front substrate 42 can clearly see the light emission on the anode 44 side. This paper size applies the Chinese National Standard (CNS) A4 specification (21〇 > < 297gongchu) 4 ----------------------... (please first Read the notes on the back and fill in this page again) Order · 519668 A7 B7 V. Description of the invention (2 < Questions to be solved by the invention > The present invention is to provide a dual-plane vacuum fluorescent display device for the purpose of providing a dual-plane vacuum fluorescent display device. In the fluorescent display device, the anodes of the two inner anodes and the back earthen plates (the surface anode) are used to create the background effect for the display of the anodes (front substrates) on the front substrate, that is, they are used as backlighting. The creation of the effect is conspicuous by the display of the front anode, or the structure that can enrich its display content. However, the conventional dual-plane vacuum fluorescent display device constitutes a display that can clearly recognize the front and back anodes. Thus, The anode-shaped display of the back anode and the dot-shaped light emission can be clearly recognized as the background display. In addition, as described above, the back anode = light emission is brighter than the front anode. , Cannot be effective In view of the various points, the present invention aims to provide a dual-plane vacuum fluorescent display device suitable for the creation of a background effect that imparts a light-scattering function to the aforementioned substrate. ≪ Means for Solving the Problems > The present invention is a dual-plane vacuum fluorescent display device, which includes a surface substrate 'which forms an anode electrode coated with phosphor on its inner surface; a back substrate' which forms an anode coated with phosphor on its inner surface; The electrode and the cathode are arranged between two substrates; and the inner surface of the substrate is rough. The present invention is the aforementioned dual-plane vacuum fluorescent display device, in which the anode electrode formed on the substrate is transparent. The invention is formed by a conductive material. The present invention is a two-plane vacuum fluorescent display device, which is formed on the previous paper size and applies the Chinese National Standard (CNS) A4 specification (210X297 public love) (Please read the precautions on the back before filling in this (Page) .Packing 丨, Yiding |: Wire 丨 519668 A7 B7 V. Description of the Invention (Anode electrode of the surface substrate is made of non-transparent conductive material and has permeability The present invention is a two-plane vacuum fluorescent display device in which an anode electrode is formed on a smoothing layer formed of a transparent insulating material formed on the inner surface of a rigid substrate. ≪ Implementation Mode of the Invention > A cross-sectional view of a bi-plane vacuum fluorescent display device according to an embodiment of the present invention. FIG. (A) is a cross-sectional view showing a portion corresponding to XA in FIG. 5 (a), and FIG. 1 (b) is a view showing i (a). ) Enlarged view of the portion 19 enclosed by the dotted line in the figure. 11 is the back substrate of glass, 12 is the front substrate of glass, 121 is the inner surface of front substrate 12, 13 is the side panel of glass, 14 is the anode, 15 is the gate, 16 is an anode, 17 is a grid, and 18 is a tungsten wire for a cathode. The anode 14 is a ferrule type, and the anode 16 is a 7-segment type. The inner surface of the front substrate 12 is formed by embossing (san (nast), etc.) described later, as shown in FIG. 1 (b). The roughened inner surface 121 forms an anode electrode constituting an anode segment. 161, each section is coated with a phosphor 162. The anode electrode 161 is formed of a transparent conductive material such as ITO, or a conductive material film (non-transparent conductive material film) such as aluminum can be formed with cuts, holes, and the like. In this case, the light emitted from the phosphor 162 passes through the cutout, and is emitted to the outside of the front substrate 12. Here, the light emission of the front substrate and the back substrate 11 will be described with reference to FIG. 3. The anode electrode 141 applied to the back substrate 11 The phosphor 142 emits light. This paper size is in accordance with the Chinese National Standard (CNS) Α4 specification (210X297 mm) 6 (Please read the precautions on the back before clicking this page) • Order — ------ -_B7_ V. Description of the invention (4) As shown in FIG. 3H, the inner surface 121 of the front substrate 12 has a number of extensions, and the rough surface of the inner surface 121 such as hi, h2, and h3 is scattered in multiple directions. The observer on the outside of the substrate 12 is formed to observe the fluorescence of the back substrate 11. The scattered light of the light emitted by the light body 142, so the observer cannot observe only the individual luminescence of the anode electrode 141, and the scattered light forming adjacent anode electrodes is also observed at the same time. For this reason, the luminous realm of each anode electrode 141 becomes indifferent Obviously, a uniform and smooth background display is formed on the whole. On the other hand, the anode electrode 161 and the phosphor 162 of the front substrate 12 are formed close to the inner surface 121 of the front substrate 12, so the observer is hardly affected by the inner surface 121. The effect of the scattering can be observed by the luminescence of the phosphor 162. Therefore, the observer on the outside of the front substrate 12 uses the scattered light of the anode of the back substrate ^ as a background to form a display 7f \ 0 of the anode of the front substrate 12. The phosphor 142 of the back substrate 11 can create a desired background color by using any combination (preferably at least 2 colors (2 types) or more) of the emission colors red (R), green (G), and blue (B). Fig. 2 is a cross-sectional view of an embodiment of an anode formed on the front substrate 12, and is an enlarged view corresponding to Fig. 1 (b). Fig. 2 (a) is an inner surface 121 of the front substrate 12, Transparent insulating materials such as The smoothing layer 163 formed of glass is formed into a flat shape (planar shape), and an anode electrode 16 is formed on the smoothing layer 163. The smoothing layer 163 is for smoothing the rough surface of the inner surface 121 and the light emission of the phosphor 162 is dispersed. The influence of the chaos becomes smaller than that in the case of Fig. 1 (b). Fig. 2 (b) is the inner surface of the front substrate 2 and the transparent conductive material such as this paper applies the Chinese National Standard (CNS) A4 specification (210X297). Love) 519668 A7 _______F7_ 5. Description of the Invention (5) ITO (indium tin oxide), etc., forms the anode electrode 164 into a flat shape or a pattern, and coats the anode electrode 164 with a phosphor 162. The anode electrode 164 'is similar to the smoothing layer 163 in Fig. 2 (a), and smoothes the rough surface of the inner surface 121. Therefore, in this case, since the anode electrode 164 also has a function of smoothing, the structure formation is simpler than that in the case of FIG. 2 (a). In the foregoing embodiment, the anode type of the front substrate and the back substrate has been described with respect to those with 7 segments and ferrules, but it is not limited to these types, even if it is used for symbols, dots, and charts. The conventional fluorescent display device may also be used. % In addition, the display of the anode on the back substrate is not only the monochrome display of red (R), green ((3), and monitor (B)), but also the combination of two or more colors, even if it is given a light and shade color (for example, Reference is made to Japanese Patent Application No. 2000-219964 concerning the applicant's application. In addition, it is not only a combination of colors, but also a meaningful display. In addition, the inner surface of the front substrate is roughened, even if it is implemented on the front substrate. It can be comprehensive, and it can be implemented only in the display field. In addition, the anode of the back substrate can be installed on the entire surface of the back substrate, even if it is installed on all or a part of the display field. The substrate has a roughened inner surface, and also has the same function as the conventional neutral density fiher. That is, the front substrate of the conventional bi-plane vacuum fluorescent display device, because it uses a transparent glass plate Therefore, various parts inside the fluorescent display device can be clearly seen from the outside, and the contrast is reduced by the metal wiring and the anode electrode, etc., or by the reflected light of the phosphor, Visibility is lowered. Here, this paper size applies the Chinese National Standard (CNS) A4 specification (210X297 mm) (Please read the precautions on the back before filling this page). Order. 519668 — ~~ ------ _ 5. Description of the invention (ό) I know that a neutral filter is separately provided to prevent the reduction of contrast, but it is not necessary to provide a neutral filter in the present invention. In addition, the metallic luster of wiring, anode electrodes, etc. The rough surface of the front substrate is scattered, showing white or milky white, and the body color of the phosphor when it is non-luminous is white, and at the same time it shows a dazzling and stable white. As a result, the dual-plane vacuum fluorescent display device of the present invention The mutual visibility between the improvement and the improvement of the aforementioned contrast. Next, in the foregoing embodiment, the roughening of the inner surface 121 of the front substrate 12 will be described. The inner surface 121 of the front substrate 12 directly forms wirings such as aluminum and the like. The thickness of the inner surface 121 is based on the thickness of the wiring and the like, and the thickness of the inner surface 121 is selected so as not to hinder the formation of the wiring and the electrical conduction of the wiring. Figure 4 shows a roughened glass substrate. The inner surface of the board shows the increase rate of the arithmetic average thickness (Ra) of the rough surface and the resistance value of the wiring, etc. in the case of forming aluminum wiring with a film thickness of 1 # m on the inner surface of the roughened surface. Relationship. When the film thickness of wiring and the like is the same, the larger the arithmetic average roughness (Ra) of the rough surface becomes, the coarser the rough surface becomes, the thicker the rough surface becomes. The arithmetic average thickness (Ra) of the inner surface 121 selected by the state system is less than 1000 A. The appropriate thickness of the inner surface 121 varies depending on the film thickness of the wiring and the like. However, in the case of the degree, the arithmetic average roughness (Ra) is selected at 80. Below a, it is hoped that it can be in the range of 500 to 300 A. In this implementation mode, the arithmetic average thickness (Ra) of the selected inner surface 121 is in accordance with the Chinese National Standard (CNS) A4 specification (210X297 mm) 9 .. ........... installation: ...............-, but ... ...........-- Edge (Please read the precautions on the back before filling out this page) 519668 A7 ___ _B7_ V. Description of the invention (7) Below 1000A 'but if the film thickness of wiring etc. becomes thicker It can also be made above 1000A (If there is no obstacle to the electrical conduction of wiring, etc.). That is, the film thickness of wiring and the like is changed in accordance with the arithmetic mean thickness (Ra). In addition, the roughening of the inner surface 121 of the front substrate 12 is performed by sandblasting, chemical polishing, etc. However, in the case of sandblasting, a particle size of # 2〇〇〇 ～ # 600 (JIS) can also be used. It is desirable that You can use the particle size of # 2000 ~ # 800. < Effects of the invention > The present invention is based on the so-called roughening of the inner surface of the substrate of the dual-plane vacuum display device, which does not impair the visibility of the anode display on the front substrate. The back anode) display is used to create the background effect. That is, by roughening the inner surface of the front substrate, the visibility of the display of the front anode is hardly reduced, but the visibility of the display of the rear anode is reduced. The state of light emission such as the ring shape and the dot shape becomes unclear. It is difficult to visually recognize each other, so a smooth and uniform background display is formed. Therefore, the present invention can change the type of the anode on the back and the method of coating the type of coating body, etc., as it can create a variety of different background displays, so it can enrich the display content of the anode on the front, and expand the double-plane vacuum. Uses of fluorescent display devices. In addition, in the conventional dual-plane vacuum fluorescent display device, the observer on the outside of the front substrate can see the display of the rear anode more clearly than the display of the front anode. The present invention also uses the rough surface of the inner surface of the front substrate. Improved that. The front substrate of the present invention has a roughened inner surface. Since it also has the function of a conventional neutral filter, it does not have a light filter in order to increase the paper size. The Chinese National Standard (CMS) A4 specification is applicable. (210X297 mm) · 1〇 · -----------------------..... (Please read the notes on the back before filling in this page ) ....-¾. 19 ... Enlarge the illustration 12 ... The inner surface 141, 161 of the front substrate ... Anode electrodes 142, 162 ... Fluorescent body 163 ... Smoothing layer 164 ... Transparent anode Electrodes 519668 A7 B7 V. Description of the invention (9) Comparison of component numbers 11 ... glass back substrate 12 ... glass front substrate 13 ... glass side panels 14, 16 ... anode 15, 17 ... thumb 18 ... tungsten for cathode Silk (please read the precautions on the back before filling this page), OK | This paper size applies the Chinese National Standard (CNS) A4 specification (210X297 mm) _ 12 _