A7 B7 410283 五、發明説明（1 ) 〔發明領域〕 本發明有關於—顯示總成，其包含至少兩豐置顯不“ 置，更明確地說’該總成包含允許顯示裝置之一對觀察者 而言，具選擇性，而排除其他觀察者。 〔發明背景〕 本發明有關於一計時器，包含一此類型之顯示總成及 更特別係此顯示總成中，一類比顯示裝置係組合以一數位 顯示裝置。 法國專利第2 4 6 2 2 8 3號已經揭示一電子錶’其 包含一類比顯示裝置及一數位顯示裝置。類比顯示裝置包 含一時針及一分針，其以傳統方式移励於刻度上’而數位 顯示裝置包含一透明液晶顯示單元安排於其所覆蓋之類比 顯示裝置上。於此專利中，該單元形成錶之結晶。數位顯 示裝置允許數位字元之顯示，例如星期之日期及月份於亮 背景中呈黑·色，或所需 > 於暗背景之彩色光，類比裝置之 刻度及分針時針將經由數位顯示裝置而看到。當數位顯示 裝置沒顯不資料時’因此，錶具有傳統表之外表，即時分 針及刻度可經由形成錶面玻璃之透明數位顯示裝置而看到 。相反地’當資料被數位裝置所顯示時，此資料係被以重 疊於類比顯示裝置之方式加以顯示。結果，使得由單元所 顯示之資料讀取變得困難，這使得由該單元所顯示之資料 量係更加大。因爲現在趨勢是完成多功能之手錶，包含筆 記’呼叫器類型等，其中數位顯示裝麗同時顯示大量資料 ，4- ---r--------批衣------、訂------^ - (請先閲讀背而之注意事項再填寫本頁) 經濟部中央標準局員工消費合作社印製 本紙張尺度適用中國國家標率（CNS ) Λ4規格（210 X 297公您} 經濟部中央標率局員工消費合作社印製 410283 A7 B7 五、發明説明（2 ) '這問題將格外嚴重。 〔發明槪要〕 因此，本發明之目的係克服前述先前技藝之缺點’藉 由提供一顯示總成，該總成包含兩重叠，爲下及上顯不裝 置’其中，可能使得爲顯示裝置之一所顯示之資料對一觀 察者及爲其他裝置所排除之顯示資料有選擇性，以對該顯 示裝置所顯示之資料有高程度之可讀性。 本發明之另-一目的係提供一顯示總成，其中上顯示裝 置係具有改良顯示對比之液晶顯示裝置。 本發明另一目的.係提供一計時器1其被裝設有具改 良審美觀外表之顯示總成。 因此，本發明有關於一顯示總成，其包含兩疊置成上 及下顯示裝置，其特徵在於上顯示裝置包含一雙層結構， 其係由一安排於光閥上之顯示單元形成，該雙層結構係被 安排使得該單元及閥係於第一狀態中呈透明，使得下顯示 裝置爲可見，及特徵在於單元顯示一資料項及在於第二狀 態中，閥爲不透明並至少部份遮蔽下顯示裝置，控制機構 被提供用於供給一控制電壓至單元及光閥，以使得它們由 第一杯態切換至第二狀態或相反方向進行。 這些特性之結果，可能選擇地使用下顯示裝置或上顯 示裝置，而不必改變另一顯示裝置之品質及可讀性。特別 是，若一人選擇下顯示裝置，則上顯示裝置可以被切換至 其第一狀態，其中其整個係透明的，使得爲下靥顯示裝置 ——：--，-----餐------1T------^ - (請先閱讀背面之注意事項再填寫本頁) 度適用中國國家標準（CNS〉A4規格（210 X 297公釐） „ 5 410283 A7 B7 五、發明説明（3 ) 所顯不之資料爲完整可見。相反地，若吾人選擇使用上顯 不器’則光閥被切換至第二狀態，其中它變成不透明及反 射’以完全地遮罩下顯示裝置，而上顯示裝置可以顯示想 要之資料.°這資料可以被顯示於暗背景中呈亮色或於亮背 景中呈黑色’這係以所使用顯示單元類型而定。以此方式 ’任何由下及下顯示裝置重置造成之資料讀取之干擾係被 去除’而改良了特別由選定顯示裝置所顯示資料之可讀性 Ο 依據第一實施例，光閥包含一扭曲向列型單元，其被 裝設備有一偏光板放置於單元之前，以及，一相關於膽固 醇膜之四分之一波長板係被順序放置於單元之後，光閥或 下顯示裝置更包含一第二四分之一波長板，其被放置於膽 固醇膜之後，及下顯示裝置包含金屬反射器放置於第二四 分之一波長板之後。 經由第二四分之一波長板之光路徑允許導源自膽固醇 膜之圓形偏光被轉換成爲線性偏光，使金屬反射器更有效 。這結構允許反射光被顯示總成所均質化，以及，其色彩 較無關於光波長。 依據第二實施例1光閥包含一扭曲向列型單元’其被 提供有一偏光板放置於單元之前’以及’一相關於膽固醇 膜之四分之一.波長板係被順序放置於單元之後’該膽固醇 膜具有第--螺旋方向，下顯示裝置包含一膽固醇鏡具有相 反於該膽固醇膜之螺旋方向。 結果，此結構中’所有通過膽固醇膜之光並代表入射 本纸張尺度適用中國國家標準（CNS ) A4規格（210X297公嬸) .6 - --Π J-----裝------訂------線 (請先閱讀背面之注意事項再填寫本頁) 經濟部中央標準局負工消f合作社印紫 經濟部中央梯準局員工消費合作社印製 Α7 41*0283: Β7 五、發明説明（4 ) 光之一半之光係被膽固醇鏡所反射，這允許顯示總成之輝 度。於手錶等之例子中，膽固醇鏡可以有利地形成手錶之 刻度。這結構之另一優點在於可以選擇不同色彩之膽固醇 鏡’這允許完成有色彩之顯示裝置。 依據第三實施例，光閥包含一扭曲向列型單元，其被 提供有一偏光板放置於單元之前’以及，一相關於膽固醇 膜之四分之一波長板係被順序放置於單元之後，下顯示裝 置更包含一半波板（Λ / 2 )，及相同於第1之第二膽固 醇膜。 結果，此結構吾人可以使用兩相關於顯示單元之相同 光元件，這代表實用觀點之優點。 依據一較佳實施例，顯示單元及光閥係於控制機構未 施加電壓時爲一透明狀態。因此，由下顯示裝置所顯示之 資料係永久地可見，而不必使上顯示裝置消耗任何能量。 這是特別有用於應用至摑帶式物件中，例如手錶之應用範 〔圖式之簡要說明〕 本發明之其他特性及優點將由以下較佳實施例之說明 參考附圖之方式呈現，圖式中： 第1圖爲一手錶之剖面圖，其被裝設有依據本發明之 顯示裝置’該總成係被切換至第一狀態允許下顯示裝置出 現。 第2圖爲示於第1圖之手錶之俯視圖，該顯示總成是 本紙張尺度適用中國國家標準（CNS ) Λ4規格（210X297公釐） — 11 丨-^-----t------ΐτ------# (請先閱讀背而之注意事項再填寫本頁) 410283 A7 B7 五、發明説明（5 ) 於相同於第1圖中之切換狀態+。 第3及4圖爲分別類似於第1及2國之示意圖，顯示 總成係被切換至第二狀態。 第5圖爲手錶之俯視區I，其中手錶係於依據本發明之 顯示總成之特定切換狀態。 第6圖爲光閥實施例之示意圖。 第7至1 〇圖示出依據本發明之顯示總成之不同實施 例之示意圖。 第 1 1 1 1 b 及 1 2 2 b圖係爲扭曲向列 (請先閱讀背面之注意事項再填寫本頁) 秦· #晶顯示單元之示意圖、:二V 主ί元件對照表 1 . 手錶 、" r 經濟部中央標準局員工消費合作社印製 2 4 6 8 10 12 14 外殼 後蓋 時鐘動件 電池 接觸彈簧 秒針 分針 時針 刻度 時點 錶而玻璃A7 B7 410283 V. Description of the invention (1) [Field of invention] The present invention relates to a display assembly, which includes at least two display devices, and more specifically, the assembly contains a pair of display devices that allow observation. It is selective, and excludes other observers. [Background of the Invention] The present invention relates to a timer, including a display assembly of this type and more particularly, a display assembly, an analog display device is a combination A digital display device. French Patent No. 2 4 6 2 2 8 3 has disclosed an electronic watch 'which includes an analog display device and a digital display device. The analog display device includes an hour hand and a minute hand, which are moved in a traditional manner. Exciting on the scale 'and the digital display device includes a transparent liquid crystal display unit arranged on the analog display device it covers. In this patent, the unit forms the crystal of a watch. The digital display device allows the display of digital characters, such as the day of the week The date and month are black and light on a bright background, or the colored light required on a dark background. The scale of the analog device and the hour and minute hands will be displayed digitally. When the digital display device does not display no data ', therefore, the watch has a traditional watch, the real-time minute hand and scale can be seen through the transparent digital display device forming the surface glass. On the contrary, when the data is digital device When displayed, this data is displayed in an overlapping manner with the analog display device. As a result, it is difficult to read the data displayed by the unit, which makes the amount of data displayed by the unit larger. Because now The trend is to complete multi-function watches, including notes, pager types, etc., where the digital display device displays a large amount of data at the same time, 4- --- r -------- batch clothes ------, order ------ ^-(Please read the back notice first and then fill out this page) Printed by the Central Consumers Bureau of the Ministry of Economic Affairs, Consumer Cooperatives This paper is sized to the Chinese National Standards (CNS) Λ4 specification (210 X 297) You} Printed by the Consumer Standards Cooperative of the Central Bureau of Standards of the Ministry of Economic Affairs 410283 A7 B7 V. Description of the invention (2) 'This problem will be particularly serious. [Summary of the invention] Therefore, the object of the present invention is to overcome the shortcomings of the previous art. By providing a display assembly, the assembly includes two overlaps, and the bottom and top display devices are not included. Among them, the data displayed for one of the display devices may have a choice between an observer and display data excluded by other devices. In order to have a high degree of readability of the data displayed by the display device, another object of the present invention is to provide a display assembly, wherein the upper display device is a liquid crystal display device with improved display contrast. An object is to provide a timer 1 which is equipped with a display assembly with improved aesthetic appearance. Therefore, the present invention relates to a display assembly including two stacked upper and lower display devices, which is characterized by The upper display device includes a double-layer structure formed by a display unit arranged on the light valve. The double-layer structure is arranged so that the unit and the valve system are transparent in the first state, so that the lower display device is visible. And is characterized in that the unit displays a data item and in the second state, the valve is opaque and at least partially shields the display device, and the control mechanism is provided for supplying a control voltage And a light valve means, such that they switch from a first state to a second state or a cup opposite directions. As a result of these characteristics, it is possible to selectively use the lower display device or the upper display device without changing the quality and readability of another display device. In particular, if one person selects the lower display device, the upper display device can be switched to its first state, where the entire system is transparent, making it a lower display device -----, --- meal- ---- 1T ------ ^-(Please read the notes on the back before filling this page) The national standard (CNS> A4 specification (210 X 297 mm)) is applicable. 5 410283 A7 B7 V. Description of the invention (3) The information displayed is completely visible. Conversely, if we choose to use the display device ', the light valve is switched to the second state, where it becomes opaque and reflective' to display under the complete mask Device, and the upper display device can display the desired data. ° This data can be displayed on a dark background with a bright color or on a light background with a black color 'This depends on the type of display unit used. In this way' Disturbances in data reading caused by lower and lower display device reset are removed 'and improved the readability of data displayed especially by the selected display device. 0 According to the first embodiment, the light valve includes a twisted nematic unit, Its mounted equipment has a polarizing plate placed on Before the yuan, and a quarter-wave plate related to the cholesterol film was sequentially placed behind the unit, the light valve or the lower display device further includes a second quarter-wave plate, which was placed behind the cholesterol film The lower display device includes a metal reflector placed behind the second quarter-wave plate. The light path through the second quarter-wave plate allows circularly polarized light guided from the cholesterol film to be converted into linearly polarized light, so that Metal reflectors are more effective. This structure allows the reflected light to be homogenized by the display assembly, and its color is less relevant to the wavelength of the light. According to the second embodiment 1 the light valve includes a twisted nematic unit 'which is provided with a polarized light The plate is placed in front of the unit 'and' a quarter of the cholesterol film is related. The wavelength plate is placed sequentially behind the unit 'The cholesterol film has a first-helix direction, and the lower display device includes a cholesterol mirror with the opposite Cholesterol film spiral direction. As a result, 'all light passing through the cholesterol film in this structure represents the incidence of this paper. Applicable Chinese National Standard (CNS) A4 Specifications (210X297) 婶. 6---Π J ----- installation ------ order ------ line (please read the notes on the back before filling this page) Central standard of the Ministry of Economy Coordination of the work of the co-operative society printed by the cooperative printed by the Central Government of the Ministry of Economic Affairs of the Ministry of Economic Affairs of the Central Consumers ’Association of Consumers printed A7 41 * 0283: Β7 V. Description of the invention (4) Half of the light is reflected by the cholesterol mirror, which allows the display assembly to be displayed. Brightness. In the example of a watch, the cholesterol mirror can advantageously form the scale of the watch. Another advantage of this structure is that different colors of cholesterol mirrors can be selected. This allows the completion of colored display devices. According to the third embodiment, light The valve includes a twisted nematic unit, which is provided with a polarizing plate placed in front of the unit 'and a quarter-wavelength plate system related to the cholesterol film is sequentially placed behind the unit. The lower display device further includes a half-wave plate (Λ / 2), and the same second cholesterol film as the first. As a result, this structure allows us to use two identical light elements related to the display unit, which represents the advantage of a practical point of view. According to a preferred embodiment, the display unit and the light valve are in a transparent state when no voltage is applied to the control mechanism. Therefore, the data displayed by the lower display device is permanently visible without having to consume any energy from the upper display device. This is particularly useful for application to strap-type objects, such as the application of a watch [brief description of the drawings] Other characteristics and advantages of the present invention will be presented by the following description of the preferred embodiment with reference to the drawings, in which : Figure 1 is a cross-sectional view of a watch, which is equipped with a display device according to the present invention. The assembly is switched to the first state to allow the display device to appear. Figure 2 is a top view of the watch shown in Figure 1. The display assembly is the paper size applicable to the Chinese National Standard (CNS) Λ4 specification (210X297 mm) — 11 丨-^ ----- t --- --- ΐτ ------ # (Please read the precautions before completing this page) 410283 A7 B7 V. Description of the invention (5) It is the same as the switching state + in the first figure. Figures 3 and 4 are diagrams similar to those of countries 1 and 2, respectively, showing that the assembly system is switched to the second state. Fig. 5 is a top view area I of the watch, wherein the watch is in a specific switching state of the display assembly according to the present invention. FIG. 6 is a schematic diagram of a light valve embodiment. Figures 7 to 10 are diagrams showing different embodiments of the display assembly according to the present invention. The 1 1 1 1 b and 1 2 2 b pictures are twisted nematic (please read the precautions on the back before filling out this page) Qin · #crystal display unit diagram, two V main components comparison table 1. Watch 、 &Quot; r Printed by the Consumer Cooperatives of the Central Standards Bureau of the Ministry of Economic Affairs 2 4 6 8 10 12 14 Case back cover Clock moving battery Contact spring Second hand Minute hand Hour hand Scale Time point watch and glass
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I &張尺度適用中國國家梯準（CNS ) 規格Ul〇X 297公釐） -8- A7 410283 五、發明説明（6 ) 經濟部中央標準局—工消費合作社印製 2 4 上 顯 示 裝 置 2 6 下 顯 示 裝 liL 2 8 顯 示 ΡΓ.Γ 卑 元 3 0 光 閥 3 2 連 接 器 3 4 基 板 3 6 基 板 3 8 密 封 框 架 4 0 1¾ 極 4 2 電 極 4 6 線 性 偏 光 板 4 7 液 晶 單 元 4 8 . 四 分 之 — 波 長 板 5 〇 _ 固 醇 膜 5 2 四 分 之 — 波 長 板 5 4 四 分 之 —丄 波 長 板 5 6 四 分 之 — 波 長 板 5 8 膽 固 醇 膜 6 0 線 性 偏 光 板 6 2 反 射 偏 光 板 6 4 線 性 偏 光 板 6 6 非 偏 光 板 6 8 偏 光 方 向 7 0 觀 4三 者 (請先閲讀背面之注意事項存填寫本頁) .裝· 訂 線 本紙張尺度適用中國國家捸準（CNS ) A4規格（210X297公釐） 9- 410283 經濟部中央標準局負工消费合作杜印製 A7 B7 五、發明説明（7 ) 〔較佳實施例之詳細說明〕 本發明之說明將以應用至例如手錶之計時器範圍加以 完成。然而，不必說’本發明並不限定於此應用，其可以 用於任何需要資料顯示，例如廣告板，量測儀器等之範圍 內。 參考第1至4圖，手錶型計時器係以參考數1加以表 示。傳統方式手錶1包含外殻2，被安裝有一後蓋4，其 中被安排有一電子時鐘動件6及一電池8 ，其經由一接觸 彈簧1 0停放於後蓋4上。動件6包含經由一控制電路而 相關於驅動裝置（未示出）之守時電路，該驅動裝置係用 於秒針1 2，分針1 4，及時針1 6 ,這些係移動於刻度 1 8上，刻度包含有小時點2 0，其可由第2圖中看出。 外殻2同時以傳統方式爲一覆蓋整個刻度1 8之錶面玻璃 2 2所封閉。 依據本發明，手錶1更包含一顯示總成*其包含兩重 疊’分別爲上及下顯示裝置2 4及2 6。於所示例子中， 下顯示裝置2 6包含時間有關資訊之顯示機構，特別是由 時’分及秒針1 2 ’ 1 4，1 6及刻度1 8所形成之類比 時間顯示機構》 不必說下顯示裝置2 6可以以任何數位顯示裝置形成 ’例如液晶顯示。顯示裝置2 6可以包含類比及數位顯示 機構’例如描述於歐洲專利第B — 0 0 7 8 237號 之組合，該案由申請人提出，或者是一裝飾元件，例如一 照片，圖畫等。 ----!------裝------訂------線 (請先閲讀背而之注意事項再填寫本頁) 本紙張尺度適用中國國家標準（CNS ) Λ4規格（21〇xm公竣） -10- 經濟部中失標準局員工消費合作杜印製 410283 Λ7 Α7 _______Μ ____ 五、發明説明（8 ) 依據本發明，一方面，上顯示裝置2 4係被安排於使 得安排於錶面玻璃2 2及光閥3 0間之顯示單元2 8，使 光閥3 0於單元及閥3 0之第一切換狀態中爲透明的’使 得由下顯示裝置2 6所顯示之資料，即於所示例子中之時 ’分及秒針1 2，1 4，1 6及刻度1 8爲可見的。此依 據本發明之顯不總成之架構係示於第2圖中。 另一方面，上顯示裝置2 4係被安排使得顯示單元 2 8顯示日期項目’例如以數字類型，及使得於第二切換 狀態中，光閥3 0爲不透明並遮蔽至少部份下顯示裝置 2 6° 顯示單元2 8及光閥3 0之切換由第一狀態至第二狀 態及相反進行係藉由整合於動件6中之控制機構（未示出 )加以完成，這些控制機構係連接至單元2 8及閥3 0， 藉由傳統連接器3 2 a，3 2 b，以供給它們控制電壓。 於所示例子中’這些連接器3 2 a及3 2 b同時形成於刻 度1 8之上緣及分別光閥3 0及單元2 8之下緣間之凸緣 〇 依據本發明示於第1至4圖之特定實施例，單元2 8 是液晶顯示型之顯示單元。該單元包含一透明前基板3 4 ，一透明後基板3 6，一密封框架3 8，形成間隔及閉合 機構並使基板3 4及3 6定界出一閉合空腔，其中安置有 一層液晶。基扳3 4及3 6之相對面包含由氧化銦（tin ) 作成之透明電極4 0，4 2。於所示例子中，前基板3 4 載有架構成數位型式之電極，每一數位形成有線段，諸線 -----，-----t.------、玎------.^ (請先閲讀背面之注意事項再填寫本頁) 本紙張尺度適用中國國家標準（CNS ) Λ4規格（210Χ297公後） -11 - A7 410283 ___B7_ 五、發明説明（9 ) 段允許形成予以顯示之數字元，而後基板3 6載有延伸於 整個表面上之電極。電極4 0及4 2係被經由位於空腔外 之接觸區域4 4，而連接至連接器3 2 a。 當一於電極4 2及某電極4 _ 0間之電壓被施加或移開 時，於這些電極4 2及4 0間之液晶係依據該液晶類型及 相關於該單元之偏光板之配置，而被由一吸收狀態切換至 一透明狀態或相反方向。因此，有可能於黑背景中呈現亮 色資料或於亮背景中呈現暗色資料。 於所示例子中，顯示單元2 8係爲扭曲向列型液晶單 元，其基板3 4及3 6之相關外表面係被提供以交叉偏光 板（未示出）。因此，當無電壓施加於電極4 0，4 2之 兩端，單元2 8係爲全部透明（第1及2圖），即於第一 切換狀態，並當一電壓被施加至電極4 〇，4 2之終端時 (切換狀態）（第3及4圖）時，則爲吸收或擴散，即於 第二切換狀態。 依據未示出之實施例，偏光板之定向係爲平:行，使得 單元於其切換狀態爲透明並於其非切換狀態爲吸收型。 不必說，單元2 8可以是其他類型，只要該單元於第 一切換狀態爲透明，而於第二切換狀態爲吸收或擴散。 特別地，吾人可以選擇S T N或從主（g η )型 L C D單元或L C D單元，具有電氣控制雙折射（E c Β )，向列膠及膽固醇組織’液晶向列或鐵電安.置丨产聚合物 中，或者動態散射。 這些類型之單元之操作及結構對於熟習於^ 支藝者係 本紙張尺度適用中國國家標準（CNS ) A4規格（210X297公1 ) 1._.!·--r-----^------订------# (請先閱讀背面之注意事項再填寫本頁) 經濟部中央標準局負工消費合作社印製 -12- 410283 A7 —____B7____ 五、發明説明（1〇 ) 爲巴知的，於本說明中將不再詳述。 (請先閲讀背面之注意事項再填寫本頁) 〜S T N型單元之操作及結構之完整說明，將參考例 如歐洲專利第E P _ A — 0 1 3 1 2 1 6號，其於此係作 爲參考 對於G Η型單元之結構及操作之完整說明，將參考例 如美國專利第4，2 5 7，6 8 2號之正對比G Η單元， 其於亮背景顯示暗色資料，該案於此係作爲參考，對於負 胃比G Η單元，即於喑背景顯示亮色資料，則參考於 1 9 6 8年由G . H . H e i ί m e i e r及L, A. Z a η 〇 m i所發行於應用物 理第1 3冊第9 1 一 9 2頁之向列液晶中之從主互相作 用〜一新光儷效應〃。 對於E C B型單元之結構及操作之完全說明，參考由 B. Ba.hadur所著之 '' 液晶應用及用途〃第2 5 4至3 0 ◦頁 ’其於此係倂入作爲參考。 對於向列膠及膽固醇組織型單元之結構及操作之完全 說明，參考美國專利第5 ，1 8 8，7 6 0號及歐洲專利 第E P — A — 〇 4 5 1 9 0 5號案，其於此倂入作爲 參考。 經濟部中央標準局員工消t合作社印製 對於聚合物分散液晶單元之操作及結構之完全了解， 參考美國專利第4，4 3 5，0 4 7號，其於此係倂入作 爲參考。 注意的是，一反向P D L C單元將可以選擇，若吾人 想要於非切換狀態取得一透明胞，及於切換狀態中爲不透 明及反射的。 -13 - 本紙張尺度適用中國國家樣準（CNS ) A4規格（210X297公釐） 410283 A7 __B7___ 五、發明説明（11 ) 對於動態散射型單元之操作及結構之完全說明，參考 由B Badhur所著*液晶應用及用途〃第1 9 6 - 2 2 7頁 所述，其於此係作爲參考。 對於鐵電型單元之結構及操作之完全說明，參考由 B Badhur所著 ''液晶應用及用途〃第3 0 7 - 3 5 6頁所 述，其於此係作爲參考。 單元2 8之所有類型可以當然是由一矩陣電極所被動 定址1或被非線性元件，例如薄層電晶體M i Μ或二極體 所主動定址。 經濟部中央標準局員工消费合作社印製 於所示例子中，光閥3 0係被電解單元形成，該電解 單元係於非切換狀態爲透明（第1及2圖），於切換狀態 爲不透明及反射（第3及4圖）。此閥3 0包含溶於置於 電極間之溶劑中之金屬鹽之電解溶劑。當閥3 0於切換狀 態時，金屬溶劑被沉積於電極之一之整個表面，而使得閥 3 0反射。當閥3 0於非切換狀態，金屬再次溶解於溶液 中，該單元再次變成透明。所述之閥3 0係例如由Duchene 所著名爲 '、電解顯示器"公開於S I D 1 9 7 8年第3 4 至3 7頁中，其於此係倂入作爲參考。 當然，依據另一實施例，光閥3 0可以由電毛狀水銀 單元所形成，該單元包含毛狀單元安排於載有電極之兩基 板之間’其於單元切換狀態中，並不會濕潤基板之表面， 使得單元爲透明，於單元非切換狀態中，濕潤基扳之整個 表面’使得單元爲反射性。此單元係例如說明於美國專利 第4 ’ 5 8 3，8 2 4號案中，於此係倂入作爲參考。 -14 - (請先閱讀背面之注意事項再填寫本頁) 本紙張尺度適用中國國家標準（CNS ) Λ4規格（2丨0X297公釐） 經濟部中央標準局員工消費合作社印製 410283 A7 _B7___________ 五、發明説明（12 ) 依據示於第6圖中之另一實施例，光閥3 0可以是由 可切換反射器作成，該反射器包含由錶面玻璃2 2側起算 ，由線性偏光板4 6，扭曲向列型（T N )液晶單元4 7 ，四分之一波長板4 8及一例如由T.J. Scheffer所著發行於 1 9 7 5年第八冊之物理應用中之命名爲"具膽固醇反射 器之扭曲向量顯示器〃中之反射器之膽固醇膜5 0之堆疊 所形成，該文章係併入作爲參考。較佳地，偏光板4 6係 爲具有高層次之極化及傳輸效率者，例如由日本三立公司 所販售之編號爲L L C 2 5 6 1 8 S F之偏光板。 於以下說明中，這些元件係相同於有關第1圖中所述 之元件，其中並被以相同編號加以指定。 參考第7圖，示出依據本發明之第一實施例。依據此 實施例，上顯示裝置2 4更包含第二四分之一板5 2，其 被放置於膽固醇膜5 0之後面，及下顯示裝置2 6係包含 一形成反射金屬器之刻度1 8。爲例示起見，刻度1 8之 可見面包含一反射金屬層，若刻度1 8並不是由金屬作成 ，或若刻度1 8爲金屬，則該面可以作鏡面拋光。可以注 意到’其可以直接於刻度1 8中與第二四分之一波長板 5 2 —體成型。 參考第8圖，示出依據本發明之第二實施例之顯示總 成。依據此實施例，下顯示裝置2 6包含一形成膽固醇鏡 之刻度1 8，該鏡具有目反於上顯示裝置2 4之膽固醇膜 5 0之螺旋方向。 參考第9圖，示出依據本發明之第三實施例之顯示總 本紙張尺度適用中國國家標準（CNS ) A4規格（2!〇X297公釐） -15 - 1,-------^------1T------^ (請先閱讀背面之注意事項再填窝本頁) 經濟部中央標準局—工消費合作社印製 410283 A7 ____ _B7__ 五、發明説明（13 ) 成。依據此實施例，下顯示裝置2 6更包含一第二及第三 四分之一波長板5 4，5 6及一替換刻度1 8之第二膽固 醇膜5 8 ^ 依據示於第1 〇圖之另一實施例，單元2 8可以包含 於錶面玻璃側一線性偏光板6 0，及於刻度1 8側一反射 偏光板6 2，其可以是相關或不相關放置於其前面之線性 偏光板6 4，於四分之一波長板4 8及膽固醇膜5 0之位 置。 以一較佳方式，反射偏光板可以是# -稜鏡型，例如 由3 Μ公司所販售以D B E F (倍亮度加強膜）之產品。 其他例如凼3 Μ公司所販售之B E F (亮度加強膜）之改 良系統亮度之膜可以相關或不相關前述之D B E F膜。若 有需要，前述之反射偏光板可以以例如由3 Μ公司所販售 以T D F爲名之透反射（transflective )偏光板加以替換。 四分之一波長板及膽固醇膜可以同時被一體成型成單一元 件，例如由默克所上市之產品TRANSMAX。 示於第1 1 a圖中之第一狀態，顯示單元2 8係由一 正介電各向異性扭曲向列（T N )液晶單元所形成’該單 元係放置於交叉線性偏光板6 0，6 4之間。同樣地’閥 3 ◦是一相關於反射偏光板6 2之正介電各向異性TN單元 ，其被定向成使得偏光之軸係垂直於放置於其前面之線性 偏光板6 4之偏光軸。因此，當顯示單元2 8及光閥3 0 於未切換狀態時，刻度1 8爲可見。如於第1 1 a圖所示 '由參考數6 6所指之本質非偏光係被第一線性偏光板 ^--------^------iT------^ (請先閲讀背面之注項存填寫本買) 本紙烺尺度適用中國國家標準（CMS > Α4規格（210Χ297公釐） -16 - 經濟部令央標準局員工消費合作社印製 410283 A7 ___ B7_____ 五、發明説明（彳4 ) 6 0所水平極化。該由參考數6 8所指之光之偏光方向係 然後經過顯示單元2 8時被旋轉9 0度，然後，其經過線 性偏光板6 4而不修正。光6 8之偏光方向係當通過光閥 3 0時再次被旋轉9 0度，使得光之成份係被反射偏光板 6 2所傳送至刻度1 8。於返回路徑時，光流經相同路徑 ，使得刻度1 8係可爲觀察者7 0所看到。相反地，當單 元2 8及閥3 0於切換狀態（第1 1 b圖），刻度1 8被 遮蔽。於第二切換狀態中，單元2 8於其切換區中被吸收 ，即於電極4 0及4 2被切換之區域中，而閥3 0係全反 射的。如由第1 1 b圖所示，通過於切換區中之單元2 8 之水平偏光並未被修正，使得其被偏光軸爲垂直之線性偏 光板6 4所吸收。同樣地，通過單元2 8於切換區外之光 偏光方向於其經由閥3 0期間並未被修改，使得其係完全 由反射偏光板6 2所反射。因此，資料係被顯示於一反射 背景中呈不透明，顯示之外表係由反射偏光板6 2之反射 色彩所決定。第1 1 b圖同時示出單元2 8之定址爲正常 1即所切換之區段係想要顯示者。依據另一未示於圖中之 實施例，顯示單元2 8之定址可以被反轉，即所有單元 2 8之區段係被切換，而不包含想要顯示之區段。於此時 ，資料係被顯示於不透明背景之單元之透明部份所顯示， 顯示之外表係由反射偏光板2 8之反射色彩及刻度1 8之 色彩所決定。 於示於第1 2 a圖之第二狀態中，顯示單元2 8及閥 3 0係均由負各向異性扭曲向列液晶3 0所形成。液晶分 I.--------裝------訂------線 (請先閲讀背而之注意事項再填寫本頁) 本紙張尺度適用中國國家標準（CNS > Λ4規格（210X297公釐） -17- 410283 A7 B7 五、發明説明（15 ) 子之排列於單元之未切換狀態中係均質的’使得顯示單元 2 8及光閥3 0於此狀態中並不會影響偏光方向。線性偏 光扳6 0，6 4及反射偏光板6 2係被定向使得偏光之個 別軸平行。藉由施加類似有關於第1 1 a及1 1 b之有關 偏光方向之推理，可以了解單元2 8及閥3 0之未切換狀 態是全透明（第1 2 a圖）’使得刻度1 8爲可見。相反 地，於第二切換狀態（第1 2 b圖）中 > 單元2 8作動爲 —T N單元，並被吸收於切換區，即於電極4 0及4 2之 被切換之區域，及閥3 0爲全反射。刻度1 8因此被遮蔽 ，顯示給觀看者7 0的是於亮背景之暗色資料，該顯示之 外表係由反射偏光扳6 2所反射之色彩而定。第1 2 b圖 示出單元定址正常時，即切換區段爲想要顯示者。依據另 一未被示於圖中之實施例，單元之定址可以被反轉，即所 有區段被切換，除了想要顯示之區段外。因此，資料係被 透明地顯示於不透明背景上，顯示之外表係被反射偏光板 6 2之反射色彩所決定。 經濟部中央梯準局員工消費合作社印製 (請先閲讀背而之注意事項再填寫本頁) 依據另一實施例，吾人可以選擇一膽固醇膜5 0，其 反射相關於預定色彩之可見光頻之部份或波長。以此方式 ，吾人可以選擇以顯示資料於互補於刻度之顏色，因此， 改良了顯示總成之對比及審美外表。 可以注意的是，於此方面，依據另一實施例，由 Scheffer所公開之T N扭曲向列液晶單元可以被例如描述於 歐洲專利第E P — A _ 〇 6 0 0 3 4 9號之彩色顯示 裝置所替換，該案係倂入作參考。 本紙張尺度適用中國國家標準（CNS > A4規格（210X297公釐〉 jo «0283 «0283 經濟部中央標準局員工消費合作社印製 A7 ________B7 五、發明説明（16 ) 於本發明之範圍內，可切換反射器係有利於非切換狀 態中爲透明的，於切換狀態中爲反射的。 已經說明之光閥3 0於未切換狀態中，均爲透明的， 並可有利地被組合以單元2 8，其係於未切換狀態中爲透 明的。因此，於應用至計時器1之範圍內，下顯示裝置 2 6，即時，分秒針1 2，1 4，1 6及刻度1 8可以以 最小能量消耗並且爲永久可見，只要是下顯示裝置2 6被 供給’以及當使用者想要讀取由顯示裝置2 4所供給之資 料使，上顯示裝置2 4被供電。 依據另一實施例，光閥3 0可以以可切換膽固醇膜加 以作成，於切換狀態時，該膜係爲透明，於非切換狀態0寺 ，該膜爲不透明及反射性的。此膽固醇膜係例如描述於歐 洲專利第E P — A — 〇 6 4 3 1 2 1號，該案係併入 作爲參考。 於單元2 8爲於散射類型之切換狀態中（動態散射， 向列膠反轉P D L C型L C D單元）> 即當其顯示一資料 項時，光閥3 0可以由T N · S T N，正對比G Η， E C Β，鐵電型或P S C Τ (聚合物穩定膽固醇組織）類 或其他具有透明狀態於非切換狀態之單元及於切換狀態爲 不透明或吸收性之液晶單元作成。P s C Τ型單元係描述 於例如美國專利第5 ，4 3 7，8 1 1號中。 因此，依據本發明之顯示總成允許獲得不同顯示架構 ，其係取決於單元2 8及光閥3 0之狀態而定。 特別是，參考例示於第1至4圖中之本發明之實施例 IJ.7--------裝------訂------線 (請先閲讀背而之注意事項弄填寫本I) 本纸張尺度適用中國國家標準（CNS } Α4規格（210X297公釐） - 19- 經濟部中央標準局員工消費合作社印製 410283 A7 B7 五、發明説明（17 ) ，其中，單元2 8係由具有交叉偏光板之T N單元所形成 ，及光閥3 0係由電解質單元形成，下顯示裝置2 6係當 單元2 8及閥3 0於未切換狀態時爲可見。於第1及2圖 所例示之架構中’由線R 1所代表之光通過上顯示裝置 2 4，並被全反射至刻度1 8及時分秒針1 2，1 4， 1 6，再次通過裝置2 4而並未被修正，而無傳輸損失’ 使得觀看者可以淸楚地讀取由下顯示裝置2 6所顯示之資 料。 相反地，當單元2 8及閥3 0於切換狀態，下顯示裝 置2 6被遮蔽。於此例示於第3及4圖之架構中，由線 R 2所代表之光通過單元2 8，於4 0及4 2切換區域外 ，並被全反射於閥3 0之表面，然後，被反射以再次傳送 經單元2 8，並使得數字元4 6以於亮背景中之暗色彩呈 現給觀看者，這些字元4 6係被單元2 8之電極4 0及 4 2切換之區域所定義。可以注意的是，下顯示單元2 6 係完全地被閥3 0所遮蔽，結果並不會呈現給觀看者。能 改變其可讀性之由下顯示裝置2 6及上顯示裝置2 4間所 顯示之資料之干擾因此可以避免。 可以注意的是依據本發明之單元2 8可以藉由使用閥 3 0而操作於反射模式，作爲一反射器，因爲其接近單元 2 8，而允許資料以改良對比加以顯示。 當單元2 8是於非切換狀態及閥3 〇是於切換狀態時 ，如同先前所述單元2 8並未顯示資料及下顯示裝置2 6 被閥3 0所遮蔽。於此架構中（未示於圖中），錶1未顯 本紙張尺度適用中國國家標準（CNS ) Λ4規格（210X297公釐） -20 - 1 J- 1 裝 訂 線 (請先閱讀背面之注意事項再填寫本頁) 410283 at B7 1 — I , . _ 五、發明説明（18 ) 示任何資料。 當單元2 8是於切換狀態及閥3 0於未切換狀態，貝ij 由下顯示裝置2 6及上顯示裝置2 4所顯示之資料均爲可 見。此架構係示於第5圖中，錶1分別顯示來自上顯示裝 置2 4及下顯示裝置2 6重疊之資料。 單元2 8及閥3 0之切換可以傳統方式加以完成，例 如經由一或多數按鈕（未示出）所控制之開關，每一按鈕 之作動造成相關於一切換狀態至另一切換狀態之單元之切 換。 ίί 1= - If. ff 1^1 I - I— I I (請先閲讀背面之注意事項再填寫本頁) i 線 經濟部中央標準局員工消费合作社印掣 本紙張尺度適用中國國家標準（CNS ) Λ4規格（210X297公釐） -21 -I & Zhang scale is applicable to China National Ladder Standard (CNS) specification UlOX 297 mm 6 Lower display device liL 2 8 Display Γ.Γ 元 元 3 0 Light valve 3 2 Connector 3 4 Substrate 3 6 Substrate 3 8 Seal frame 4 0 1¾ Pole 4 2 Electrode 4 6 Linear polarizer 4 7 LCD cell 4 8. Quarter—wavelength plate 5 〇_ sterol film 5 2 quarter—wavelength plate 5 4 quarter— 丄 wavelength plate 5 6 quarter—wavelength plate 5 8 cholesterol film 6 0 linear polarizer 6 2 reflected polarized light Plate 6 4 Linear polarizing plate 6 6 Non-polarizing plate 6 8 Polarizing direction 7 0 View 4 (please read the precautions on the back and fill in this page). Binding and binding This paper size is applicable to China National Standards (CNS) A4 specifications (210X297 mm) 9- 410283 Duty printing and cooperation of the Central Bureau of Standards, Ministry of Economic Affairs, printed A7 B7 V. Description of the invention ( 7) [Detailed description of the preferred embodiment] The description of the present invention will be completed by applying to a timer range such as a watch. However, it is needless to say that the present invention is not limited to this application, and it can be used in any range that requires data display, such as advertising boards, measuring instruments, and the like. Referring to Figures 1 to 4, the watch-type timer is indicated by the reference number 1. The conventional watch 1 includes a case 2 and a rear cover 4 is installed therein. An electronic clock 6 and a battery 8 are arranged in the watch 1 and are placed on the rear cover 4 via a contact spring 10. The moving part 6 includes a timekeeping circuit related to a driving device (not shown) via a control circuit, which is used for the second hand 12, the minute hand 14, and the time hand 16, which are moved on the scale 18 The scale includes the hour 20, which can be seen in Figure 2. The housing 2 is simultaneously closed in a conventional manner by a surface glass 22 covering the entire scale 18. According to the present invention, the wristwatch 1 further includes a display assembly * which includes two overlays', which are upper and lower display devices 24 and 26, respectively. In the example shown, the lower display device 26 includes a display mechanism for time-related information, in particular an analog time display mechanism formed by the hours, minutes, and second hands 12, 14, 16, and scale 18. Needless to say, The display device 26 may be formed of any digital display device such as a liquid crystal display. The display device 26 may include an analog and digital display mechanism 'such as the combination described in European Patent No. B-0 0 7 8 237, which was proposed by the applicant, or a decorative element such as a photograph, a drawing, and the like. ----! ------ install ------ order ------ line (please read the precautions before filling this page) This paper size is applicable to China National Standard (CNS) Specification of Λ4 (compared to 21 × xm) -10- Printed by the Consumers' Cooperative Standards Bureau of the Ministry of Economic Affairs Du printed 410283 Λ7 Α7 _______ Μ ____ V. Description of the Invention (8) According to the present invention, on the one hand, the upper display device 2 4 is Arranged to make the display unit 2 8 arranged between the surface glass 22 and the light valve 30, to make the light valve 30 transparent in the first switching state of the unit and the valve 30, so that the lower display device 26 The information displayed, that is, the hour, minute and second hands 12, 14, 16, 16 and scale 18 are visible in the example shown. The architecture of the display assembly according to the present invention is shown in FIG. On the other hand, the upper display device 24 is arranged such that the display unit 28 displays a date item 'for example in a digital type, and in the second switching state, the light valve 30 is opaque and covers at least part of the lower display device 2 The switching of the 6 ° display unit 28 and the light valve 30 from the first state to the second state and vice versa is performed by control mechanisms (not shown) integrated in the moving part 6, which are connected to The unit 28 and the valve 30 are supplied with control voltages by the conventional connectors 3 2 a and 3 2 b. In the example shown, 'these connectors 3 2 a and 3 2 b are simultaneously formed on the upper edge of the scale 1 8 and the flanges between the light valve 30 and the lower edge of the unit 28 respectively. In the specific embodiment shown in FIGS. 4 to 4, the unit 2 8 is a liquid crystal display type display unit. The unit includes a transparent front substrate 3 4, a transparent rear substrate 36, and a sealing frame 38, forming a spacing and closing mechanism and delimiting the substrates 3 4 and 36 to form a closed cavity in which a layer of liquid crystal is placed. The opposite surfaces of the base plates 34 and 36 include transparent electrodes 40, 42 made of indium oxide (tin). In the example shown, the front substrate 3 4 carries a rack to form a digital type of electrode, each of which forms a wire segment, the wires -----, ----- t .------, 玎- -----. ^ (Please read the notes on the back before filling in this page) The paper size is applicable to the Chinese National Standard (CNS) Λ4 specification (210 × 297 male) -11-A7 410283 ___B7_ 5. Description of the invention (9) The segments allow the digital elements to be displayed, and the substrate 36 carries electrodes extending over the entire surface. The electrodes 40 and 4 2 are connected to the connector 3 2 a via a contact area 4 4 located outside the cavity. When a voltage between the electrode 42 and an electrode 4_0 is applied or removed, the liquid crystal between these electrodes 42 and 40 is based on the type of the liquid crystal and the configuration of the polarizing plate related to the unit, and It is switched from an absorption state to a transparent state or the opposite direction. Therefore, it is possible to present light data on a black background or dark data on a light background. In the example shown, the display unit 28 is a twisted nematic liquid crystal cell, and the relevant outer surfaces of the substrates 34 and 36 are provided with a cross-polarizing plate (not shown). Therefore, when no voltage is applied to both ends of the electrodes 40, 42, the cells 28 are all transparent (Figures 1 and 2), that is, in the first switching state, and when a voltage is applied to the electrodes 4 0, When the terminal 2 is 2 (switching state) (Figures 3 and 4), it is absorption or diffusion, that is, the second switching state. According to an embodiment not shown, the orientation of the polarizing plate is flat: rows, so that the unit is transparent in its switching state and absorbing in its non-switching state. Needless to say, the unit 28 can be of other types, as long as the unit is transparent in the first switching state and is absorbing or diffusing in the second switching state. In particular, we can choose STN or slave (g η) type LCD unit or LCD unit with electrical controlled birefringence (E c Β), nematic gum and cholesterol tissues' liquid crystal nematic or ferroelectric safety. Polymer, or dynamic scattering. The operation and structure of these types of units are familiar to ^ supporters. This paper size is applicable to the Chinese National Standard (CNS) A4 specification (210X297 male 1) 1 ._.! · --R ----- ^- ---- Order ------ # (Please read the notes on the back before filling out this page) Printed by the Consumers' Cooperative of the Central Standards Bureau of the Ministry of Economic Affairs-12- 410283 A7 —____ B7____ 5. Description of the invention (1〇 ) For the sake of knowledge, it will not be detailed in this description. (Please read the notes on the back before filling this page) ~ For a complete description of the operation and structure of the STN unit, refer to, for example, European Patent No. EP _ A — 0 1 3 1 2 1 6 which is hereby used as a reference For a complete description of the structure and operation of the G Η unit, reference will be made to, for example, the U.S. Patent No. 4, 2 5 7, 6 8 2 for a positive contrast G Η unit, which displays dark data on a bright background. This case is used as For reference, for the negative gastric ratio G Η unit, that is, the bright color data is displayed on the background of 喑, refer to G. H. Hei ei meier and L, A. Z a η omi published in Applied Physics in 1968 Interaction between the master and the master in the nematic liquid crystal on page 13 of Book 13 on page 9 1 to 9 ~ a new light effect. For a complete description of the structure and operation of the E C B-type unit, please refer to "Liquid crystal applications and uses" by B. Ba.hadur, pp. 254 to 30 ◦ page ‘hereby incorporated by reference. For a complete description of the structure and operation of nematic gum and cholesterol tissue-type units, refer to U.S. Patent No. 5,188,760 and European Patent No. EP — A — 〇 4 5 1 9 0 5 It is incorporated herein by reference. Printed by the Consumers' Cooperative of the Central Bureau of Standards of the Ministry of Economics For a complete understanding of the operation and structure of polymer dispersed liquid crystal cells, refer to US Patent No. 4, 4 35, 0 47, which is hereby incorporated by reference. Note that a reverse P D L C unit will be available if we want to obtain a transparent cell in the non-switched state, and it is opaque and reflective in the switched state. -13-This paper size applies to China National Standard (CNS) A4 (210X297 mm) 410283 A7 __B7___ V. Description of the invention (11) For a complete description of the operation and structure of the dynamic scattering unit, refer to the work by B Badhur * Liquid crystal applications and uses: described on pages 196-2 2 7 for reference. For a complete description of the structure and operation of a ferroelectric cell, refer to '' Applications and Applications of Liquid Crystals '' by B Badhur on pages 3 0 7-3 5 6 which is hereby incorporated by reference. All types of cells 28 can of course be passively addressed by a matrix electrode 1 or actively addressed by a non-linear element such as a thin-film transistor M i M or a diode. Printed in the example shown by the Staff Consumer Cooperative of the Central Standards Bureau of the Ministry of Economic Affairs. The light valve 30 is formed by an electrolytic unit, which is transparent in the non-switching state (Figures 1 and 2) and opaque in the switching state. Reflection (Figures 3 and 4). This valve 30 contains an electrolytic solvent of a metal salt dissolved in a solvent placed between the electrodes. When the valve 30 is switched, a metal solvent is deposited on the entire surface of one of the electrodes, so that the valve 30 is reflected. When the valve 30 is in the non-switching state, the metal is dissolved in the solution again, and the unit becomes transparent again. The valve 30 is known, for example, by Duchene as 'Electrolytic Display' disclosed in SI D 1 978, pages 3 4 to 37, which is hereby incorporated by reference. Of course, according to another embodiment, the light valve 30 may be formed by an electric hair-like mercury unit, which includes a hair-like unit arranged between two substrates carrying electrodes, which is not wet when the unit is switched. The surface of the substrate makes the unit transparent. In the non-switching state of the unit, the entire surface of the substrate is moistened to make the unit reflective. This unit is described, for example, in U.S. Patent No. 4 '5 8 3, 8 24, which is incorporated herein by reference. -14-(Please read the precautions on the back before filling this page) This paper size applies to the Chinese National Standard (CNS) Λ4 specification (2 丨 0X297 mm) Printed by the Employees' Cooperative of the Central Standards Bureau of the Ministry of Economic Affairs 410283 A7 _B7___________ V. Description of the invention (12) According to another embodiment shown in FIG. 6, the light valve 30 may be made of a switchable reflector, which includes a surface glass 22 and a linear polarizer 46, Twisted Nematic (TN) liquid crystal cell 47, quarter-wave plate 48, and a physical application named " with cholesterol reflection, for example, published by TJ Scheffer in Volume 1975, Volume 1975 This article is incorporated by reference as a result of a stack of cholesterol films 50 of reflectors in a distorted vector display. Preferably, the polarizing plate 46 is a polarizing plate with a high level of polarization and transmission efficiency, for example, a polarizing plate numbered L L C 2 5 6 1 8 S F sold by Sanri Japan. In the following description, these components are the same as those described in relation to Figure 1, and are designated by the same reference numerals. Referring to Fig. 7, there is shown a first embodiment according to the present invention. According to this embodiment, the upper display device 24 further includes a second quarter plate 52, which is placed behind the cholesterol film 50, and the lower display device 26 includes a scale 1 8 forming a reflective metal. . As an example, the visible surface of the scale 18 includes a reflective metal layer. If the scale 18 is not made of metal, or if the scale 18 is metal, the surface can be mirror polished. It can be noted that it can be formed integrally with the second quarter-wavelength plate 5 2 directly in the scale 18. Referring to Fig. 8, there is shown a display assembly according to a second embodiment of the present invention. According to this embodiment, the lower display device 26 includes a scale 18 for forming a cholesterol mirror, which has a spiral direction that is opposite to the cholesterol film 50 of the upper display device 24. Referring to FIG. 9, it is shown that the display paper size according to the third embodiment of the present invention is applicable to the Chinese National Standard (CNS) A4 specification (2.0 × 297 mm) -15-1, ------- ^ ------ 1T ------ ^ (Please read the notes on the back before filling in this page) Printed by the Central Standards Bureau of the Ministry of Economy—Industrial and Consumer Cooperatives 410283 A7 ____ _B7__ V. Description of the Invention (13 ) to make. According to this embodiment, the lower display device 26 further includes a second and a third quarter wave plate 5 4, 5 6 and a second cholesterol film 5 8 replacing the scale 18. ^ The basis is shown in FIG. 10 In another embodiment, the unit 28 may include a linear polarizer 60 on the surface glass side, and a reflective polarizer 62 on the scale 18 side, which may be a linear polarizer placed in front of or related to it. 64, at the position of quarter-wave plate 48 and cholesterol film 50. In a preferred manner, the reflective polarizing plate may be a #-稜鏡 type, for example, a product sold by 3M company with D B E F (brightness enhancement film). Other films, such as B E F (brightness enhancement film), which are sold by the company 凼 3M, which improve the brightness of the system, may or may not be related to the aforementioned D B E F film. If necessary, the aforementioned reflective polarizing plate may be replaced by a transflective polarizing plate sold under the name of T D F sold by the 3M company. The quarter-wave plate and the cholesterol film can be integrated into a single component at the same time, such as TRANSMAX, a product marketed by Merck. In the first state shown in Figure 1a, the display unit 28 is formed by a positive dielectric anisotropic twisted nematic (TN) liquid crystal cell. The unit is placed on a crossed linear polarizer 6 0, 6 Between 4. Similarly, the 'valve 3' is a positive dielectric anisotropic TN unit related to the reflective polarizing plate 62, which is oriented so that the axis of polarized light is perpendicular to the polarizing axis of the linear polarizing plate 64 which is placed in front of it. Therefore, when the display unit 28 and the light valve 30 are not switched, the scale 18 is visible. As shown in Figure 1 1a ', the essential non-polarized light system referred to by reference number 6 6 is the first linear polarizer ^ -------- ^ ------ iT ---- -^ (Please read the note on the back and fill in the purchase first) The paper size is applicable to the Chinese national standard (CMS > Α4 size (210 × 297 mm) -16-Printed by the Consumers' Cooperative of the Central Standard Bureau of the Ministry of Economic Affairs 410283 A7 ___ B7_____ V. Description of the invention (彳 4) Horizontal polarization of 60. The polarization direction of the light indicated by reference number 68 is then rotated 90 degrees when passing through the display unit 28, and then it passes through linear polarization Plate 6 4 is not modified. The polarization direction of light 6 8 is rotated 90 degrees again when passing through light valve 30, so that the light component is transmitted to the scale 1 8 by the reflective polarizing plate 62. On the return path The light flows through the same path, so that the scale 18 series can be seen by the observer 70. Conversely, when the unit 28 and the valve 30 are in the switching state (Figure 1b), the scale 18 is blocked. In the second switching state, the unit 28 is absorbed in its switching area, that is, in the area where the electrodes 40 and 42 are switched, and the valve 30 is totally reflective. As shown, the horizontal polarized light passing through the unit 2 8 in the switching area is not corrected, so that it is absorbed by the linear polarizing plate 64 whose polarizing axis is vertical. Similarly, the polarized light passing through the unit 2 8 outside the switching area is polarized. The direction during which it passes through the valve 30 is not modified, so that it is completely reflected by the reflective polarizer 62. Therefore, the data is displayed in a reflective background that is opaque, and the outer surface is displayed by the reflective polarizer 62. It is determined by the reflection color. Figure 1 1b also shows that the addressing of unit 2 8 is normal, that is, the switched segment is intended to be displayed. According to another embodiment not shown in the figure, the display unit 2 8 The addressing can be reversed, that is, the section of all units 28 is switched without including the section you want to display. At this time, the data is displayed and displayed on the transparent part of the unit with opaque background. The outer surface is determined by the reflective color of the reflective polarizing plate 28 and the color of the scale 18. In the second state shown in Figure 12a, the display unit 28 and the valve 30 are all negative anisotropy. Formed by twisted nematic liquid crystal 30. Liquid crystal points I .----- --- Packing ------ Order ------ Line (Please read the precautions on the back before filling this page) This paper size applies to Chinese national standards (CNS > Λ4 specification (210X297 mm) -17- 410283 A7 B7 V. Description of the invention (15) The arrangement of the children in the unswitched state of the unit is homogeneous, so that the display unit 28 and the light valve 30 do not affect the polarization direction in this state. Linear polarization The plates 60, 64 and the reflective polarizer 62 are oriented so that the individual axes of the polarized light are parallel. By applying similar inferences about the direction of polarized light about 1 1 a and 1 1 b, it can be understood that the unswitched states of unit 2 8 and valve 3 0 are completely transparent (Figure 1 2 a), so that the scale 1 8 is visible. Conversely, in the second switching state (Fig. 12b), the unit 28 operates as a -TN unit and is absorbed in the switching area, that is, the area where the electrodes 40 and 42 are switched, and the valve 3 0 is total reflection. The scale 1 8 is therefore obscured and displayed to the viewer 70 as dark data on a light background. The appearance of the display is determined by the color reflected by the reflective polarizer 62. Figure 1 2b shows that when the unit addressing is normal, the section is switched to the one who wants to display. According to another embodiment which is not shown in the figure, the addressing of the cells can be reversed, that is, all sections are switched, except for the section which is to be displayed. Therefore, the data is displayed transparently on an opaque background, and the display surface is determined by the reflection color of the reflective polarizer 62. Printed by the Consumer Cooperative of the Central Government Bureau of the Ministry of Economic Affairs (please read the precautions before filling this page) According to another embodiment, we can choose a cholesterol film 50 whose reflection is related to the visible light frequency of a predetermined color Part or wavelength. In this way, we can choose to display the data in a color complementary to the scale, so the contrast and aesthetic appearance of the display assembly is improved. It can be noted that, in this regard, according to another embodiment, the TN twisted nematic liquid crystal cell disclosed by Scheffer can be described, for example, in a color display device of European Patent No. EP — A _ 0 6 0 3 4 9 Instead, the case is incorporated for reference. This paper size applies to Chinese national standards (CNS > A4 specifications (210X297 mm) jo «0283« 0283 Printed by the Consumer Cooperatives of the Central Standards Bureau of the Ministry of Economic Affairs A7 ________B7 V. Description of the invention (16) Within the scope of the present invention, The switching reflector is advantageous for being transparent in the non-switching state and reflective in the switching state. The already explained light valve 30 is transparent in the non-switching state and can be advantageously combined into a unit 2 8 It is transparent in the unswitched state. Therefore, within the range applied to timer 1, the lower display device 26, real-time, minute and second hands 1, 2, 1, 4, 16 and scale 18 can be used with minimum energy. Consumed and permanently visible, as long as the lower display device 26 is supplied 'and when the user wants to read the data supplied by the display device 24, the upper display device 24 is powered. According to another embodiment, the light The valve 30 can be made with a switchable cholesterol film. In the switching state, the film is transparent. In the non-switching state, the film is opaque and reflective. This cholesterol film is described, for example, in European patents. No. EP — A — 〇 6 4 3 1 2 1, this case is incorporated as a reference. Unit 28 is in the switching state of the scattering type (dynamic scattering, nematic PDLC type LCD cell) > That is, when it displays a data item, the light valve 30 can be composed of TN · STN, positive contrast G Η, EC Β, ferroelectric type or PSC Τ (polymer stabilized cholesterol tissue) or other transparent state in non-switching state And a liquid crystal cell which is opaque or absorptive in the switching state. P s C T type cells are described in, for example, US Patent No. 5, 4 3 7, 8 1 1. Therefore, the display assembly according to the present invention Different display architectures are allowed, depending on the states of the unit 28 and the light valve 30. In particular, reference is made to the embodiment IJ.7 of the present invention illustrated in Figures 1 to 4 --- --Installation ------ Order ------ line (please read the precautions below and fill in this I) This paper size applies to China National Standard (CNS) Α4 size (210X297 mm)- 19- Printed by the Consumer Cooperatives of the Central Standards Bureau of the Ministry of Economic Affairs 410283 A7 B7 V. Description of Invention (17) The 2 8 series is formed by a TN unit with a crossed polarizing plate, and the light valve 30 is formed by an electrolyte unit. The lower display device 2 6 is visible when the unit 2 8 and the valve 3 0 are not switched. In the first In the architecture exemplified in FIG. 2, the light represented by the line R 1 passes through the upper display device 2 4 and is totally reflected to the scale 18 and the minute and second hands 1 2, 1 4 and 1 6 pass through the device 2 4 again. It has not been corrected, and there is no transmission loss', so that the viewer can read the data displayed by the lower display device 26 clearly. Conversely, when the unit 28 and the valve 30 are switched, the lower display device 26 is blocked. In the architecture shown in Figures 3 and 4 in this example, the light represented by the line R 2 passes through the unit 28, is outside the switching area of 40 and 42, and is totally reflected on the surface of the valve 3 0. The reflection is transmitted again through the cell 28, and the digital element 46 is presented to the viewer in a dark color in a bright background. These characters 4 6 are defined by the area where the electrodes 4 0 and 4 2 of the cell 2 8 switch. . It can be noted that the lower display unit 2 6 is completely blocked by the valve 30, and the result is not presented to the viewer. The interference of the data displayed between the lower display device 26 and the upper display device 2 4 which can change its readability can therefore be avoided. It can be noted that the unit 28 according to the present invention can be operated in the reflection mode by using the valve 30 as a reflector, because it is close to the unit 28, allowing the data to be displayed with improved contrast. When the unit 28 is in the non-switching state and the valve 3o is in the switching state, as described previously, the unit 28 does not display data and the lower display device 2 6 is blocked by the valve 30. In this structure (not shown in the figure), Table 1 does not show that the paper size applies to the Chinese National Standard (CNS) Λ4 specification (210X297 mm) -20-1 J- 1 gutter (please read the precautions on the back first) (Fill in this page again) 410283 at B7 1 — I,. _ 5. The description of the invention (18) shows any information. When the unit 28 is in the switching state and the valve 30 is not in the switching state, the data displayed by the lower display device 26 and the upper display device 24 are visible. This architecture is shown in Figure 5. Table 1 shows the data from the upper display device 24 and the lower display device 26 overlapping, respectively. The switching of unit 28 and valve 30 can be done in a conventional manner, for example, by means of a switch controlled by one or more buttons (not shown), the action of each button causes the unit related to one switching state to another switching state Switch. ίί 1 =-If. ff 1 ^ 1 I-I— II (please read the notes on the back before filling this page) i Printed by the Central Consumers Bureau of the Ministry of Economic Affairs, Consumer Cooperatives The paper size is applicable to Chinese National Standards (CNS) Λ4 specification (210X297 mm) -21-