經濟部中央標準局員工消費合作社印製 531685 A7 ______B7 五、發明説明（1 ) (發明所屬之技術領域） 本發明係反射裝置及其製造方法以及使用該反射裝置 之顯示裝置。特別是有關於具有優異之反射光之指向性。 例如在液晶顯示裝置中在視野角範圍內之反射光之輝度之 可提高之反射裝置，以及使用該反射裝置之顯示裝置。 (先前技術） 在於液晶顯示裝置等顯示裝置中，有：在顯示單元之 中背面側設有反射面之反射型；在顯示單元之背面設有半 透過型之反射面；又在背面側設有背光之半反射型；又在 顯示單元之背部設有背光之背光型；等等。這些背光乃由 導光體及形成在此導光體之背面之反射面及對於此導光體 內賦予光之光源所構成。 以往上述反射面乃使用由鋁等之金屬蒸著膜所成之平 面狀之鏡面，或在粗糙面上形成上上述金屬蒸著膜等者。 (發明所欲解決之問題） 上述之反射面爲平面狀之鏡面時，在此反射面上無法 使光散亂，對於顯示單元要賦予適宜之顯示輝度很困難。 又在粗糙面上形成了金屬蒸著膜等之反射面時，雖然 具有將光散亂之效果，惟在於液晶單元等之顯示單元之有 效視野角之限定在一定角度之下，上述粗糙面之光之散亂 方向爲隨機，因此無法有效地提高上@有效視野角範圍內 之反射光之輝度。 本紙張尺度適用中國國家標準（CNS) A4規格（210 X 297公釐) Γ4ΓΙ "~ (請先閲讀背面之注意事項再填寫本頁) 衣. 訂_ 531685 A7 B7 五、發明説明（2 ) 爲了使之具有上述反射光之輝度之可提高之角度範圍 有指向性，須要光學的設計形成反射面，而此種光學的反 射面乃以微細的尺寸的形成光學的設計之凹凸形狀，惟以 往很困難達到高精度的形成微細之凹凸的光學面並適合於 大量生產地予以製造。 ， . 本發明係爲了解決上述先前技術之問題，提供一種以 光學的設定反射面之表面形狀，使之.能提高規定之反射角 度內之反射光之輝度，而於顯示單元之有效視野角之關係 ，而可能設定可提高反射光之輝度之反射裝置，以及使用 此反射裝置之顯示裝置。 再者本發明係提供一種，可以將反射面之表面形狀光 學的設定爲微細的形狀之凹凸狀，並且以簡單的製程而以 高精度的形成此凹凸形狀之反射裝置之製造方法爲目的。 (解決問題之手段） 經濟部中央標準局員工消費合作社印製 (請先閲讀背面之注意事項再填寫本頁) 在本發明中乃以光學的設計反射面之表面形狀，而例 如以全息照相術（Hologram )之製造製程相同之製程而很 容易製造而成者。 即本發明之反射裝置乃，備有全反射或半反射之反射 面視其斷面時之上述反射面爲由微細之凹曲線並排而成之 形狀爲其特徵者。又例如將上述凹曲線之節距定爲5 〇 // m以下。 由於以光學的設計此微細的凹曲f之形狀，因此以反 射面之垂線爲中心而在規定之角度範圍內可提高反射光之 本紙張尺度適用中國國家標準（CNS ) A4規格（210X297公釐）-5- 531685 A7 B7 五、發明説明（3 ) 輝度也。 又以連續之規定數之凹曲線爲1組時，在上述1組內 乃包含有不同節距之凹曲線，且以上述1組之凹曲線爲1 單位地反複形成爲宜。此時1組之凹曲線之寬度尺寸爲 1 2 0 // m 以上。 ， . 又例如以1 2 0 // m以上之寬度尺寸之範圍規則的或 隨機的變更凹曲線之節距，而以上述.寬尺寸爲1組而反複 它之結果就可以防止由反射光之干涉所致之呈顯條紋花樣 或彩虹花樣之光之干涉條紋現象。 又上述之斷面爲凹曲線之凹面乃可以使之條紋狀的延 伸於與上述斷面成交叉之方向，又將上述反射面平面視時 ，由上述凹面之條紋乃以曲線狀地延伸爲宜。 以上述地構成時，不但在於沿著直交於上述條紋之斷 面之方向（圖6之X方向），得於光學的設定反射光之輝 度，而且在於上述斷面直交之方向（Y方向），而將反射 方向之輝度之分佈，設定於以反射面之垂直爲中心之規定 角度範圍內，以資擴大反射光之輝度高之範圍。 經濟部中央標準局員工消費合作社印製 (請先閲讀背面之注意事項再填寫本頁) 再者，上述條紋之曲線形狀乃，例如圖6 B所示同心 圓形狀爲宜，再者在本發明中並不侷限於在斷面呈凹曲線 之凹面之條紋狀的形成者，將球面狀等之三次元之凹面之 鄰接地形成所構成亦可以。 再者，反射面以斷面來觀視時之形狀乃下述之任一均 可。 | 設對於上述凹曲線之最底部之接線成垂直之線爲中心 本紙張尺度適用中國國家標準（CNS ) A4規格（210X297公釐）-6 - 531685 A7 B7 五、發明説明（4 ) 線0 1時，上述凹曲線乃對於上述中心線0 1而以對稱的 形狀地延伸之圓弧曲線者。 設對於上述凹曲線之最底部之接線成垂直之線爲中心 線0 1時，上述凹曲線乃挾著上述中心線0 1而一方側係 與另一方側相比較時較長的延伸。， . 設對於上述凹曲線之最底部之接線成垂直之線爲中心 線0 1時，上述凹曲線乃對於上述中.心線0 1只延伸於一 方之圓弧曲線者。 此時上述自中心線0 1而較長的延伸之凹曲線側乃對 於使用時之視線之方向朝向於下側者。 如上所述，對於中心線0 1而斷面之凹曲線之延伸於 一側之形狀之反射面之使用方法爲，將上述延伸於一側之 方向做爲朝下方向地予以使用時，即可以將由斜上方所被 賦予光有效的反射於反射面之前面，因此使用於顯示裝置 用之反射面時，可以提高反射輝度於使用者之視線方向。 經濟部中央標準局員工消費合作社印製 (請先閱讀背面之注意事項再填寫本頁) 又，本發明之反射裝置而，該斷面爲凹曲線之凹面之 條紋狀的形成於與上述斷面成交叉之方向時，在於上述條 紋上地延伸之凹面上，隔著間隔地形成橫斷上述條紋之溝 爲宜。 又上述溝之斷面形狀係與上述凹曲線相似形爲宜。 如上所述斷面爲凹曲線之凹面之條紋狀地延伸時，如 果使隔著間隔地形成橫斷上述條紋之溝，換言之隔著間隔 地形成沿著上述凹曲線之方向之溝時I，即可以對於全方向 地使光之反射方向集中於反射面之前方。此時令溝之形狀 本紙張尺度適用中國國家標準（CNS ) A4規格（210X297公釐） 531685 Α7 Β7 五、發明説明（5 ) 光學的設計成與凹曲線相似形之結果，得使光之反射方向 集中於反射面之前方。又如果以等節距地形成上述溝時很 容易發生「干涉條紋」現象。因此上述溝宜以不等節距來 形成，而以此不同等距之複數之溝爲1組時，以反複此1 組之溝之方式來構成即合宜。 ， . 再者，得薄片表面之斷面爲凹曲線所並排之形狀，而 在此薄片表面上將反射金屬膜予以·成.膜以資形成上述反射 面之構造。以此構造時，即以輥表面來加工薄片表面達成 可以高精度地形成具有規定之光學特性之凹部之效果。 又本發明之顯示裝置乃，上述之反射裝置在於顯示體 單元之顯示面側及相反側之外面，而以反射面朝向單元側 之狀態地予以設置爲其特徵。或上述反射裝置乃在顯示體 單元之內部而反射面之朝向顯示面側之狀態地被設置爲其 特徵。 上述顯示單元乃液晶顯示單元等。 經濟部中央標準局員工消費合作社印製 (請先閱讀背面之注意事項再填寫本頁) 由於液晶顯示單元等之顯示單元之面板間之間隙通常 爲5 //m乃至7 //m程度乃最普遍，因此鄰接之凹曲線之 境界面與凹曲線之底部之間之高度尺寸h爲1 //m以下爲 宜。即上述高度尺寸h爲顯示單元之間隙尺寸之1 / 5以 下爲合宜。上述高度尺寸h超過顯示單元之間隙尺寸之 1 / 5時，在單元內顯著的發生間隙條紋，例如在液晶顯 示單元時即成爲發生色彩條紋（斑）等之原因。 在上述中，凹曲線之接線與顯示f元之顯示面所形成 之角度爲0，以此角度0之最大絕對値爲0 n，對於顯示面 本紙張尺度適用中國國家標準（CNS ) Α4規格（210X297公釐）_ 8 - 531685 A7 B7 五、發明説明（6 ) 之垂線之顯示單元之有效視野角爲0 t時，上述0 n爲0 t 之約1 / 2爲宜。 以如上述的設定反射面之凹曲形狀時，即由於顯示單 元之有效視野角之關係而可設定可提高反射光之輝度之範 圍而可能提高顯示單元之對比之比値。. 再者，本發明之反射裝置之製造方法乃在於製造倂用 於顯示單元之光學裝置之方法中，具.有：加工其表面具有 微細之凹凸之光學面以資形成原板之過程；及在上述原板 之光學面上，形成金屬膜，剝離該金屬膜而形成複製品之 過程，及將此複製品之表面形狀轉印於基板，而在上述基 板表面上，形成與上述原板之光學面相同之凹凸之過程， 以及在上述基板之凹凸面形成反射金屬膜之過程，爲其特 徵。 例如具有：將上述複製品附著於輥表面，一方面將輥 加熱至規定溫度，而令上述複製品滾動於基板表面而在基 板表面轉印凹凸面之過程。 經濟部中央標準局員工消費合作社印製 (請先閱讀背面之注意事項再填寫本頁) 本發明之一合宜之例子乃在原板上同心圓狀地加工微 細的溝，以資形成具有凹凸之光學面，而在複製品上形成 同心圓狀之凹凸面，在基板之表面轉印具有同心圓形狀之 凹凸面而形成反射面者。 本發明之反射裝置之製造方法時，由於在原板上形成 凹凸形狀之光學面，而介著複製品將它轉印於基板上，因 此得於備有規定之反射指向性地高精p地形成基板表面之 反射面。 本紙張尺度適用中國國家標準（CNS ) A4規格（210X297公釐）_ 9 - 531685 A7 B7 五、發明説明（7 ) 又在上述中，加工於原板之凹凸面及轉印於基板表面 之反射面之斷面爲，由微細之凹曲線所並排而成之形狀爲 宜。 由上述，光學的設計微細之凹曲線之形狀，由而以反 射面之垂線爲中心。以規定角度範圍內可提高反射光之輝 度。 又以連續之規定數之凹曲線爲1.組時，在上述1組內 包含有不同節距之凹曲線者，且以上述1組之凹曲線爲1 單位，將它反複形成爲宜。此時1組之凹曲線之寬度尺寸 乃以1 2 0 以上爲宜。 如上所述，以例如1 2 0 // m以上之寬度尺寸之範圍 ，將凹曲線之節距有規則的或隨機的變更，將上述寬度尺 寸爲1組，而予以反複，由而可以防止由反射光之干涉所 致之條紋花樣之發生或呈顯彩虹花樣之光之干涉條紋現象 〇 經濟部中央標準局員工消費合作社印製 (請先閲讀背面之注意事項再填寫本頁) 再者，如果將上述形成凹凸面之溝形成爲同心圓狀時 ，不但在沿著直交於溝之斷面之方向（圖6之X方向）而 光學的設定反射光之輝度之指向性，在於與上述斷面直交 之方向（Y方向）也可以將反射方向之輝度分佈設定於以 反射面之垂線爲中心之規定角度內，由而擴大反射光之高 輝度之範圍。 再者，以本發明之製造方法所製造之顯示裝置乃在顯 示單元之顯示面側及相反側之外面而f其反射面朝向單元 側狀態地予以設置，或上述反射裝置之在顯示單元之內部 本紙張尺度適用中國國家標準（CNS ) A4規格（210X297公釐）-1〇 - 531685 * A7 B7 _ 五、發明説明（9 ) 反射，介經上述反射光而可目視對應於液晶材料之透過 不透過之對比之顯示。 再者，使上述反射裝置1 0爲半透過型，而在上述液 晶顯示單元1之背面設置背光裝置（逆光照明）亦可。此 時如背光裝置不點燈時即藉由反射裝置1 0之反射光來確 保顯示內容之輝度，而晚間即藉由背光裝置之光來獲得顯 示輝度。 又本發明中即亦可採用本發明之反射裝置爲設置於液 晶顯示單元1之背面之背光裝置之反射面。 圖6A，6B乃反射裝置10之平面圖。 此反射裝置1 0乃厚度爲1 0 //m以上，最好爲1 0 //m以上1 〇 〇 〇 //m以下之薄片（基板薄膜）之表面蒸 著了鋁等之反射全屬膜以資形成反射面者。在全反射型之 反射裝置1 0中，薄片（基板薄膜）乃使用硬質之氯化乙 烯等。欲構成半透過型之反射裝置1 0時，反射金屬膜之 膜厚爲 5 0 0A ( Angstrom = 1 0— 1Qm)程度。 經濟部中央標準局員工消費合作社印製 (請先閱讀背面之注意事項再填寫本頁) 在上述薄片（基板薄膜）之表面之反射面乃鄰接狀地 形成有微細之凹面G。圖6 A即上述凹面G係Y方向條紋 狀平行的延伸，而圖6 B即上述條紋狀之凹面G乃同心圓 狀地彎曲形成。 圖3乃將上述反射裝置1 〇放大的表面延伸於直交於 條紋之凹面G之方向而延伸之斷面（圖6之ΠΙ —瓜斷面） ，圖1乃將圖3之一部份放大所示之p斷面圖。 如圖1及圖3之放大斷面圖所示，此反射裝置1 〇之 本紙張尺度適用中國國家標準（CNS ) A4規格（210X297公釐） 531685 A7 B7 五、發明説明（10 ) 構造乃薄片（基板薄膜）1 1之表面做爲反射面1 2，惟 在此反射面1 2即形成鄰接之凹面G。而視其斷面時，即 凹面G之部份之反射面1 2乃呈凹曲線狀，更詳細的說即 呈顯規定半徑r (例如r二2 5 // m )之圓弧曲線形狀。 圖3乃將上述反射裝置1 〇在於該延伸於直交於條紋 狀之凹面G之方向之斷面（圖6之m — m斷面）予以放大 顯示者。圖1即圖3之一部份放大所.示之同斷面圖。 如圖1及圖3之放大斷面圖所示，此反射裝置1 0之 構造乃薄片（基板薄膜）1 1之表面做爲反射面1 2。而 在此反射面1 2形成鄰接之凹面G，並且視其斷面時，凹 面G之部份之反射面1 2乃呈顯凹曲線狀，更詳細地說成 爲規定半徑r (例如r = 2 5 // m )之圓弧曲線形狀。 經濟部中央標準局員工消費合作社印製 (請先閱讀背面之注意事項再填寫本頁) 如圖1所示，將一個凹面G視其斷面時之凹曲線，於 顯示面之方向（X方向：水平線之方向），以長度800 A之單位而區分爲1，2，3，…，j ，…η，而直交於 由上述圓弧形狀之曲率中心0而延伸於上述區間之境界點 之半徑（法線）之接線爲S i，S 2，…S j，…S η。又各 接點S :，S 2…與水平線Η形成之角度（傾斜角）之絕對 値爲Q i，Q 2，Q 3，…，Q j，…Q η。又這些角度之正 負之符號而對於水平線Η而接線S朝向順時鐘方向爲「負 」，而對於水平線Η而接線S爲朝向反時鐘方向時即爲「 正」。 圖2乃在橫軸上表示上述接線之|S斜角度0。此傾斜 角度乃表示以各8 0 0 Α地予以區分之部份之接線S i， 本紙張尺度適用中國國家標準（CNS ) A4規格（210X297公釐）-13 - 531685 A7 B7 五、發明説明（11 ) S 2，…s j，…S η之與水平線Η所成之角度。縱軸乃表 示上述接線S i，S 2，…S j，…S η之與水平線Η所成之 傾斜角0之數値之頻度。如圖1所示，凹面G之斷面形狀 爲圓弧曲線時，以等間隔地區分水平方向（X方向）時之 各點之接點之傾斜角0之數値之頻度乃在每一凹面1個分 別爲「1」。並且傾斜角之範圍爲Θ i至0 η之範圍，而負 側之境界爲0 i，正側之境界爲θ η，所以斷面之呈圓弧狀 之凹曲線之凹面G之鄰接地被形成之反射面1 2即傾斜角 之範圍係如上述0 i〜0 η，每一各傾斜之數値之頻度乃比 例於凹面G之數目，而在圖2之線圖中表示頻度之曲線i 即在縱方向呈顯一柱狀。 經濟部中央標準局員工消費合作社印製 (請先閱讀背面之注意事項再填寫本頁) 另一方面反射面之延伸於X方向之平坦之鏡面時，反 射面之接線即對於水平線Η所形成之角度均爲〇度。此以 外之角度並不存在。圖2中，在鏡面之接線所形成之角度 之頻度係表示於曲線ϋ。又反射面之延伸於X方向之平面 爲白紙或粗糙面時，該粗糙面之凹凸面之接線之與水平線 Η所成之傾斜角即，在〇度到± 9 0度之範圍內以均一之 頻度來顯現。圖2中顯現白紙或粗糙面之傾斜角之頻度之 曲面即以iii來顯示。 設定對於反射面（水平線Η )垂直之方向而有平行光 入射而該光在反射面被反射，而如圖5 Α所示將可提高反 射光之輝度之角度範圍爲對於反射裝置10之反射面之垂 線V定爲土 α時，此角度α即將是凹p線之接線之傾斜角 度之範圍之大致2倍，所以在圖2中以i表示之本發明之 本紙張尺度適用中國國家標準（CNS ) A4規格（210X297公釐） ΛΛ 一 531685 A7 B7___ 五、發明説明（12 ) 反射面1 2時，輝度之能提高之角度範圍土“乃01〜θη 之範圍之2倍，即係土 2 X 或±2 X 0η。例如爲 —15度，θη爲+15度時’即反射光之輝度之能提高之 角度範圍*土 α乃約土 3 0度。 所以將0 1,〜0 η對合於液晶顯示單元1之有效視野角 而予以設計，就可以提高液晶顯示單元1之有效視野範圍 之反射光之輝度，以資提高顯示之對·比値。即將上述接線 S :，S 2…之傾斜角之成爲最大之絕對値爲θ η ’而對於 液晶顯示單元之有效視野範圍之垂線V之角度爲0 t時，使 0η爲之約1/2爲合宜。 另一方面在圖2中，以ϋ所示，將反射面做成延伸於 水平線方向之平坦之鏡面時’即會在反射面上形成畫像’ 不宜做爲顯示單元之反射裝置。又反射面爲白紙或粗糙面 時即如圖中以iii所示，反射面之傾斜角之頻度之範圍寬廣 且各角度之頻度變低，因此無法實現提高顯示單元之有效 視野角之範圍之反射光之輝度。 經濟部中央標準局員工消費合作社印製 (請先閲讀背面之注意事項再填寫本頁) 又圖1中由於幾何學的描繪凹曲線，所以鄰接之凹面 G之境界點a乃成爲銳角之棱緣狀，惟將此境界點a不形 成棱緣狀，而亦可以使之成爲小的曲率之曲線狀，將境界 點a朝圖示上方使之爲凸狀之曲線時，反射面之接線之傾 斜角之頻度乃較圖2 i稍有變化，而傾斜角度之成爲〇度 及其近傍之値之頻度變高，惟反射面整體看時之提高輝度 之特性即仍與圖1所示者大致同等。i 又稜緣a之部份形成爲大曲率之曲線狀，而將圖1所 本紙張尺度適用中國國家標準（CNS ) A4規格（210X297公釐）~_彳5_ 531685 A7 B7 五、發明説明（13 ) 示之斷面之形狀形成爲波浪曲線（S i η曲線）亦可以， 此時也將成爲傾斜角之境界之角度0 i及0 η而以液晶顯示 單元之有效視野角之關係地設定於一定之範圍時，即可能 提高液晶顯示單元之有效視野角之範圍之反射光之輝度。 本案中圖1所示之凹曲線之節距即5 0 // m以下爲宜 ，例如1 0 //m〜1 4 程度更爲合宜，如果節距過大 時，即使反射面形成與凹面鏡同等之.機能，使顯示畫像發 生歪變。 又例如5 0 # m以下之等節距而從凹曲線鄰接地予以 連續時，由來自各個之凹面G (各個之凹曲線）之反射光 之干涉而會出現條紋花樣或彩虹花樣。 爲了防止此種光之干涉條紋現象之發生起見，應設法 在一定之範圍內之凹曲線之節距不會成爲等節距爲宜。圖 3乃表示實施此種對策之反射面1 2。在圖3中所鄰接之 凹曲線間之節距即如1 0 // m，1 1 // m，1 2 // m， 經濟部中央標準局員工消費合作社印製 (請先閲讀背面之注意事項再填寫本頁) 1 3 // m，1 4 // m地隨機的變化或依序有規則的變化。 並且含有不同節距之複數之凹曲線爲1組時，以此1組爲 1單位地這它連續的並排而成者。包含不同節距之1組之 凹曲線群之寬度寸法（或位於1組之凹曲線群之兩端位置 之凹曲線之曲率中心0間之距離）以1 2 0 // m以上爲宜 ，又最合宜即以1 4 0 // m以上。此時即將呈顯1 2 0 // m以上之凹曲線之組之有規則之反複，惟使此反複之凹 曲線群之1單位之寬度爲如上述之1 p 0 // m以上就可防 止上述光之干涉條紋現象也。 本紙張尺度適用中國國家標準（CNS ) A4規格（210X297公釐）-16 - 531685 A7 B7 五、發明説明（14 ) 又以1 2 0 //m以上之寬度爲單位之1組之中，凹曲 線之節距全部不同者爲合宜。惟如上述例如將1 0 // m， 12//m，13//m，14//m 之 5 種節距隨 機的並排即充分可發揮干涉條紋之防止效果。爲防止光之 干涉條紋現象之發生乃在上述1組內至少含有2種以上之 節距乃必要之事。 又在此反射裝置1 0中，由於鄰.接地設置了凹曲線， 因此表面成爲凹凸形狀，而此凹凸之高度尺寸即由凹曲線 之底部到凹曲線之境界點a至之高度h。如圖5 A所示， 反射裝置1 0之設置於液晶顯示單元1之間隙4內時，如 果上述凹凸之高度尺寸h太大時，即實質上會發生液晶顯 示單元1之間隙條紋。爲了防止由該間隙條紋所致之影像 顯示品質之降低，上述高度h乃以間隙尺寸ά之1 / 5以 上爲宜。由於通常之液晶顯示單元中，上述間隙尺寸δ爲 5 //m〜7 //m之範圍，所以上述高度尺寸h乃以1 //m 以下爲宜。 經濟部中央標準局員工消費合作社印製 (請先閱讀背面之注意事項再填寫本頁) 圖4係表示上述凹凸之高度尺寸h與凹曲線之接線之 傾斜角之最大値0 n之關係。 由圖4所示之圖可知高度尺寸h = r ( 1 — c 〇 s 0η )。本例中求出h^l/zm之條件即r = 2 5/zm時0n爲 1 6 . 3度以下。 又凹曲線之節距Ρ乃Ρ = 2 X r · s i η 0 η，7 = 25//m，0η=16 · 3度即節距q之最大値爲14//m ，所以在r = 2 5 //m而使凹凸之高度尺寸爲1 /zm以下 本紙張尺度適用中國國家標準（CNS ) A4規格（210X297公釐）_ 17 - 531685 A7 B7 五、發明説明（15 ) 之條件乃使節距P爲1 4 // m以下就可以。 如上所述，以凹面G直交之斷面觀視反射面1 2時， 凹曲線之接線S i，S 2，…之傾斜角Θ i，Θ η…之角度範 圍被限定，因此可能將反射光之輝度之可提高之角度範圍 設定於規定之視野角範圍內。 ， . 如圖6 Α所示凹面G之Υ方向平行地條紋狀地延伸之 構造時，即關於X方向，得於在上述.反射光之輝度可提高 之範圍內可以具有指向性，惟對於Y方向即無法發揮此種 效果。 另一方面關於圖6 B所示者時，由於條紋狀地延伸之 凹面G乃排列於同心圖上，因此在Y方向也得於使之具有 反射光輝度之指向性。所以欲形成凹面G時，圖6 B之構 造比圖6 A爲合宜。再者，以圖6所示之平面形狀來觀視 時，凹面G之波浪狀的連續於Y方向亦可。再者形成其斷 面之能呈顯如圖1或圖3之具有凹曲線之三次元的凹部， 例如形成球面狀之凹部而可能使之對於X方向及Y方向之 雙方之可提高反射光之輝度之範圍內地使之具有指向性也 〇 經濟部中央標準局員工消費合作社印製 (請先閲讀背面之注意事項再填寫本頁) 下面使用圖7之過程圖說明上述反射裝置10之製造 方法，特別是圖6 B所示之反射裝置之製造方法。 圖7之製作原板之過程a中，乃在標號2 0所示之金 屬圓板之表面實施精密車床加工，形成同心圓之條紋狀之 凹面G a。此凹面G a乃如圖3所示0節距不同之規定數 之凹曲線之1組爲1單位而得於連續地予以加工。此加工 本紙張尺度適用中國國家標準（CNS ) A4規格（210X297公釐）_ 18 - 531685 A7 B7 五、發明説明（16 ) 乃例如將原板2 0固定於精密加工車床之加工軸使之旋轉 ，使用先端之由單結晶材料所形成之車刀而對同心圓之溝 G a施予螺旋狀之切削加工，此時調整車刀之推進速度， 而如圖3所示將溝G a之節距隨機地使之變化，或節距所 變化之規定數之溝群爲1組而能反複狀地予以加工。此原 板2 0中只有規定之矩形狀之領域2 0 a使用於製造反射 裝置1 0。 在製作複製品過程b即製作上述領域2 0 a部份之母 模。 在此過程中，對於原板2 0之表面全域或矩形狀之領 域2 0 a以電鑄加工形成硬質金屬膜（例如硬質鎳、膜） ，剝開此膜而形成複製品。 在過程C即在加壓加工用之輥上，附著上述複製品並 予以固定。 經濟部中央標準局員工消費合作社印製 (請先閲讀背面之注意事項再填寫本頁) 在浮彫加工過程d即在PET (聚對苯二甲酸酯）等 之表面，做爲基板（基板薄膜）而設置硬質氯化乙烯片、 挾於上述輥而推送、該時將輥加熱，而將上述複製品設定 於規定溫（硬質氯化乙烯之玻璃轉移點T g附近之溫度） 而在薄片表面可以轉印如圖3所示之凹曲面。 在反射膜蒸著過程e即在轉印了凹凸之基板（基板薄 膜）之表面上蒸著鋁等之反射金屬膜，以資形成反射面 12° 於是去除必要面積以外之部份完0反射片（反射裝置 1 0 )也。 本紙張尺度適用中國國家標準（CNS ) A4規格（210X297公釐）-19 - 531685 A7 B7 五、發明説明（17 ) (請先閲讀背面之注意事項再填寫本頁) 依此製造方法時，在原板2 0上高精度地加工凹面 G a由而可以將如圖1或圖3所示之具有規定之光學特性 之反射面高精度地大量生產也。 使用圖8以下之圖說明本發明之反射裝置之其他實施 形態。 > , · 圖8所示之反射裝置3 0乃在圖1乃至圖6所示之反 射裝置1 0之凹面G之排列之方向，.即在圖6 A之Y方向 形成溝G X。 在此溝G X上以沿著凹面G (凹曲線）之方向延伸。 且凹面G之條紋狀的延伸之方向（Y方向）隔著間隔形成 有多數條。 此溝G X之斷面形狀乃被形成爲與上述反射裝置1 〇 上所形成之凹面G相似之形狀。即如圖1所示斷面爲圓弧 曲線，圓弧曲面之接線之與水平面所形成之角度之最大之 絕對値爲6> n，對於液晶顯示單元之有效視野範圍之垂線V 之角度爲時，將爲之約1/2爲宜。 經濟部中央標準局員工消費合作社印製 又上述溝G X之節距（相鄰之溝之中心間之距離）乃 如上述圖3所說明，其非等節距而以5 0 # m以下且隨機 的形成爲宜。又以節距不同之規定條數之溝G x爲1組’ 而構成這組之溝G X之反複排列而成爲宜。 如上述地所獲得之反射裝置3 0乃不但在X方向’對 於Y方向也可提高有效視野角之範圍內之輝度。在全範圍 地使反射輝度具有指向性，而使顯示^置之視野角度範圍 內之反射輝度提高，提高顯示對比値。又由於隨機的設置 本紙張尺度適用中國國家標準（CNS ) A4規格（210X297公釐）-20 - 531685 Α7 Β7 五、發明説明（18 ) 溝G X之節距而可防止由設置溝G X所致之干涉條紋之發 生。 再者，使用本發明之反射裝置之顯示裝置中，通常入 射之光線（自然光或螢光燈之光線）乃並非對於顯示面而 從垂線V方向而入射，通常由斜上方入射之情形較多。又 使用者之目視方向即大致垂線V方向。 圖9乃將上述反射裝置1 0及3. 0縱置，而由其正面 觀視時之情形。圖1以下所示之反射裝置1 0及圖8所示 之反射裝置3 0中，凹面G之斷面之凹曲線即圓弧曲線。 如圖9所示，凹曲線之最底部之接線爲H s，此接線H s 與水平線Η所成之角度爲〇度。對此接線H s之垂線爲中 心線爲0 1，即上述反射裝置1 0及反射裝置3 0中，凹 曲線即對於上述中心線0 1而對於對稱之方向延伸同一長 度。 如圖9所示，以使用者所觀視之方向爲與中心線0 1 成平行方向，而假定對於中心線0 1而由上述而以0 t之角 度（例如3 0度）之角度而對於反射面1 2入射平行光線 〇 經濟部中央標準局員工消費合作社印製 (請先閱讀背面之注意事項再填寫本頁) 此時，在由上述凹曲線之中心線0 1以上之上半，即 由斜上方之平行光中之L 1到L 2爲止之範圍之入射光， 對於此入射光之反射光即自L 1 >到L 2 /爲止之範圍。 由上述反射光L 1 /到L 2 /即成爲照出/3領域之方向者 。追將成爲較視線朝下方向之光。| 相對於它由中心線0 1之下半部即由斜上方來之平行 本紙張尺度適用中國國家標準（CNS ) Α4規格（210X297公釐）_ 21 - 531685 A7 B7 五、發明説明（19 ) 光之中由L 2到L 3爲止之範圍成爲入射光，而其反射光 將成爲由L 2 /到L 3 /之範圍。此由反射光L 2 >到 L 3 /之範圍之光之方向爲α領域，這是朝向視線之方向 〇 在上述中如比較上半部之反射光之照射範圍/3與下半 部之照射範圍α時，領域α之方較能將反射光引導至有效 視野角之範圍內，由而提高輝度。相.反地照射範圍/3之光 即對於有效視野角之輝度之提高不太會有頁獻。 於是在於對於來自斜上方之光之反射機能之有所必要 提高之液晶顯示裝置等之反射裝置時，即在凹面之斷面之 凹曲線中。使它對於中心線0 1而上下對稱且具有同樣長 度之延伸者相比，形成具有由中心線0 1而下面部份爲較 上面部份者爲長的凹面G者更合宜。再者令只在自凹面G 之中心線0 1之下半部形成爲連續之略鋸齒型之反射面時 ，即可以獲得在有效視野角範圍內更可提高輝度之反射裝 置4 0。 經濟部中央標準局員工消費合作社印製 (請先閱讀背面之注意事項再填寫本頁) 圖1 0係表示上述反射裝置4 0之一例。乃斷面爲半 凹曲面線（半圓弧曲線）所成之略鋸齒型之凹面G /之連 續形成而成者。 此時之1節距爲鄰接之凹面G >之二個份，而此1節 距之大小仍以上述之理由而5 Ο μ m以下爲宜，例如1 0 〜1 4 //m程度更爲合宜。 再者在上述反射裝置4 0來說也晕如前面所說明，以 連續之規定數之凹曲線爲1組時，在上述1組內也包含有 本紙張尺度適用中國國家標準（CNS ) A4規格（210X297公釐）-22 - 531685 A7 _____B7 五、發明説明（2〇 ) 凹曲線之節距不同者。且以上述1組之凹曲線爲1單位而 將它反複形成者爲宜。此時1組之凹曲線之寬度尺寸以 (請先閱讀背面之注意事項再填寫本頁) 1 2 0 // m以上爲宜。如上所述，例如將1 2 0 // m以上 之寬度範圍將凹曲線之節距有規則或隨機的予以變更，而 以上述寬度尺寸爲1組將它反複，，由而可防止由於反射光 之干涉所致之呈顯條紋花樣或彩虹花樣之光之干涉條紋現 象也。 圖1 1乃上述反射裝置4 0之改良之另一例子。在此 反射裝置5 0中與圖8所示之溝G X同樣之構成，即在上 述裝置5 0上，沿著上述凹面G >之凹曲線設置斷面之具 有凹曲面形狀之溝G / X者。 另一方面，如上述所獲得之反射裝置30，40， 5 0均可能採用與圖7同一裝置方法來製造。 首先在圖1 0所示之反射裝置4 0時，即在製造原板 經濟部中央標準局員工消費合作社印製 2 0時即將凹面之形狀呈顯略鋸齒狀的予以形成即可。又 製造具有圖8及圖1 1之溝GX或G / X之反射裝置時， 即在圖7所示之原板2 0上形成凹面G a之後，分級加工 直交於條紋狀之凹面G a之溝即可以。 又關於本發明之反射裝置並侷限於上述之實施例，例 如在圖6 B所示之同心圓狀之反射裝置1 0上將圖8所示 之溝同樣地予以形成亦可。又在圖6 B中亦可以將凹面 G /做成圖1 0所示之斷面形狀。 ! (發明之效果） 本紙張尺度適用中國國家標準（CNS ) M規格（210x297公釐）-23 - 531685 A7 B7 五、發明説明（21 ) 如上所述，依本發明時得於使之在可提高反射光之輝 度之範圍內具有指向性，可以做成，對於液晶顯示單元等 之顯示單元之有效視野角範圍與上述可提高輝度之角度範 圍予以對合之設計，又由凹曲面之節距之組合而可防止光 之干涉條紋現象之發生也。 、 . 又在基板表面轉印凹凸面後蒸著金屬反射膜由而以大 量生產之方式製造薄型之反射基板。. 又依本發明之顯示裝置時，在有效視野角範圍內可提 高及射光之輝度，因此可提高視野之對比値也。 圖式之簡單說明 第1圖係表示本發明之反射裝置之反射面之斷面形狀 之放大斷面圖。 第2圖係表示圖1所示之反射面之接線之傾斜角之頻 度，及在平坦之鏡面及白紙接線之角度之頻度之關係之線 圖。 經濟部中央標準局員工消費合作社印製 (請先閱讀背面之注意事項再填寫本頁) 第3圖係表示令凹曲線之節距不相同狀態之反射面之 放大斷面圖。 第4圖係表示凹曲線之曲率半徑與凹曲線之接線之角 度，凹凸之高度尺寸之關係之說明圖。 第5 A，5 B圖乃表示顯示單元與反射裝置之實裝關 係之放大斷面圖。 第6A，6B圖係反射裝置之平p圖。 第7圖係表示反射裝置之製造過程之說明圖。 本紙張尺度適用中國國家標準（CNS ) A4規格（210X297公釐）-24 - 531685 A7 B7 五、發明説明（22 ) 第8圖係表示本發明之反射裝置之實施形態之斜視圖 〇 第9圖係表示本發明之反射裝置之入射光與反射光之 關係之說明圖。 第1 0圖係表示本發明之反射裝置之其他實施形態之 放大斷面圖。 第1 1圖係表示本發明之反射裝.置之其他實施形態之 斜視圖。 (請先閱讀背面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 (標號說明） 1 液晶顯示單元 2， 3 玻璃基板 4 單元間隙 10 ，3 0 反射裝置 4 0 ，5 0 反射裝置 11 基板 1 2 _反射面 G， G ^ 凹面/ G X ，G / X 溝 本紙張尺度適用中國國家標準（CNS ) A4規格（210 X 297公釐）-25 ·Printed by the Consumer Cooperative of the Central Standards Bureau of the Ministry of Economic Affairs 531685 A7 ______B7 V. Description of the Invention (1) (Technical Field to Which the Invention belongs) The present invention relates to a reflection device, a manufacturing method thereof, and a display device using the reflection device. In particular, it is related to having excellent directivity of reflected light. For example, in a liquid crystal display device, a reflection device that can increase the brightness of reflected light in a range of a viewing angle, and a display device using the reflection device. (Prior art) In a display device such as a liquid crystal display device, there are: a reflective type in which a reflective surface is provided on the back side of the display unit; a semi-transmissive reflective surface is provided in the rear side of the display unit; and a rear side is provided. Backlit semi-reflective type; Backlit type with backlight on the back of the display unit; etc. These backlights are composed of a light guide, a reflective surface formed on the back of the light guide, and a light source that imparts light to the light guide. Conventionally, the reflective surface is a flat mirror surface formed of a metal vapor-deposited film such as aluminum, or a metal vapor-deposited film or the like is formed on a rough surface. (Problems to be Solved by the Invention) When the above-mentioned reflecting surface is a flat mirror surface, light cannot be scattered on this reflecting surface, and it is difficult to provide a display unit with suitable display brightness. When a reflective surface such as a metal vapor deposition film is formed on the rough surface, although it has the effect of scattering light, the effective viewing angle of a display unit such as a liquid crystal cell is limited to a certain angle. The direction of the scattered light is random, so the brightness of the reflected light in the upper @effective field of view cannot be effectively improved. This paper size applies to China National Standard (CNS) A4 (210 X 297 mm) Γ4ΓΙ " ~ (Please read the precautions on the back before filling this page). Order _ 531685 A7 B7 V. Description of the invention (2) In order to make it have the directional range of the above-mentioned reflected light that can be increased in angle, an optical design is required to form a reflective surface, and this optical reflective surface is fine The size of the concave-convex shape of the optical design is difficult to achieve. In the past, it was difficult to achieve a high-precision optical surface with fine unevenness, and it is suitable for mass production. ,. The present invention is to solve the aforementioned problems of the prior art, to provide an optical setting of the surface shape of the reflecting surface, so that it. It is possible to increase the brightness of the reflected light within the specified reflection angle, and the relationship between the effective viewing angle of the display unit, and it is possible to set a reflection device that can increase the brightness of the reflected light, and a display device using the reflection device. Furthermore, the present invention provides a manufacturing method of a reflecting device capable of optically setting the surface shape of a reflecting surface to a fine shape of unevenness, and forming the uneven shape with a high accuracy by a simple process. (Means of Solving the Problem) Printed by the Consumer Cooperatives of the Central Standards Bureau of the Ministry of Economic Affairs (please read the precautions on the back before filling this page) In the present invention, the surface shape of the reflective surface is designed optically, for example, by holography (Hologram) The manufacturing process is the same process and is easily manufactured. That is, the reflecting device of the present invention is characterized in that the reflecting surface provided with a total reflecting or semi-reflecting surface is a shape formed by arranging fine concave curves side by side when the reflecting surface is viewed in section. For another example, the pitch of the concave curve is set to 5 0 // m or less. Because of the optical design of the shape of this fine concave curve f, the paper size of the reflected light can be increased within the specified angle range with the perpendicular of the reflecting surface as the center. The Chinese paper standard (CNS) A4 specification (210X297 mm) is applicable. ) -5- 531685 A7 B7 5. Description of the invention (3) The brightness is also. When a predetermined number of consecutive concave curves is used as a group, it is preferable that the concave curves of different pitches are included in the above-mentioned one group, and the concave curves of the above-mentioned one group are repeatedly formed as a unit. At this time, the width of the concave curve of group 1 is more than 1 2 0 // m. ,. Another example is to change the pitch of the concave curve regularly or randomly with a range of width width above 1 2 0 // m, and use the above. The wide size is one group, and repeating the result can prevent the interference fringes of light with streaks or rainbow patterns caused by the interference of reflected light. Moreover, the concave surface of the above-mentioned cross section is a concave curve, which can be made to extend in a stripe shape in a direction intersecting the above-mentioned cross section. When the reflecting surface is viewed in a plane, it is preferable that the stripes of the concave surface extend in a curved shape. . When configured as described above, not only lies in the direction perpendicular to the cross section of the stripe (X direction in FIG. 6), but it is obtained by optically setting the brightness of the reflected light, but also in the direction orthogonal to the cross section (Y direction). The brightness distribution of the reflection direction is set within a predetermined angle range with the vertical of the reflection surface as the center, so as to expand the range of high brightness of the reflected light. Printed by the Consumer Cooperatives of the Central Standards Bureau of the Ministry of Economic Affairs (please read the precautions on the back before filling this page). Furthermore, the curved shape of the above stripes is, for example, a concentric circle shape as shown in Figure 6B. It is not limited to the formation of the stripe shape of the concave surface having a concave curve in the cross section, and it is also possible to form a three-dimensional concave surface such as a spherical surface adjacent to each other. The shape of the reflecting surface when viewed from a cross section may be any of the following. | Let the bottom line of the above concave curve be a vertical line as the center. This paper size applies the Chinese National Standard (CNS) A4 (210X297 mm) -6-531685 A7 B7 5. Description of the invention (4) Line 0 1 At this time, the concave curve is an arc curve extending symmetrically with respect to the center line 0 1. When a line perpendicular to the bottommost line of the concave curve is taken as the center line 01, the concave curve extends longer when one side is compared with the other side while holding the center line 01. ,. When the bottom line of the above concave curve is a vertical line as the center line, the above concave curve is for the above. The heart line 0 1 extends only on one side of the arc curve. At this time, the side of the concave curve extending longer from the center line 0 1 is directed toward the lower side in the direction of the line of sight during use. As described above, for the reflective surface of the shape of the concave curve of the cross section extending on one side with respect to the center line 01, the method of using the direction extending on one side as the downward direction can be used. Since the light given from the obliquely upward direction is effectively reflected on the front surface of the reflective surface, when it is used on a reflective surface for a display device, the reflected luminance can be increased in the user's line of sight. Printed by the Consumers' Cooperative of the Central Standards Bureau of the Ministry of Economic Affairs (please read the precautions on the back before filling this page) and the reflective device of the present invention, the cross section of which is a concave curve with a stripe shape formed on the cross section In the direction of crossing, it is preferable that grooves crossing the stripes are formed on the concave surface extending on the stripes. The cross-sectional shape of the groove is preferably similar to the concave curve. As described above, when the cross section is a stripe-shaped concave surface extending in a stripe shape, if grooves crossing the stripe are formed at intervals, in other words, grooves along the direction of the concave curve are formed at intervals I, that is, The direction of light reflection can be concentrated in front of the reflection surface in all directions. At this time, the shape of the groove is adapted to the Chinese national standard (CNS) A4 specification (210X297 mm) 531685 Α7 Β7 V. Description of the invention (5) The result of the optical design similar to the concave curve can reflect the light The direction is concentrated in front of the reflecting surface. If the grooves are formed at equal pitches, the "interference fringes" phenomenon easily occurs. Therefore, the above grooves should be formed with unequal pitches, and when a plurality of grooves with different equidistances are used as a group, it is appropriate to construct the grooves by repeating the grooves of this group. ,. Furthermore, the cross section of the surface of the sheet is a shape of a concave curve side by side, and a reflective metal film is formed on the surface of the sheet. The film is configured to form the above-mentioned reflecting surface. With this structure, the surface of the sheet is processed by the surface of the roller, so that the recessed portion having predetermined optical characteristics can be formed with high accuracy. Further, the display device of the present invention is characterized in that the above-mentioned reflection device is provided on the display surface side and the opposite side outer surface of the display unit, and is provided with the reflection surface facing the unit side. Or, the above-mentioned reflecting device is provided as a feature in a state where the reflecting surface is facing the display surface side inside the display unit. The display unit is a liquid crystal display unit or the like. Printed by the Consumer Cooperatives of the Central Standards Bureau of the Ministry of Economic Affairs (please read the precautions on the back before filling this page). The gap between the panels of the display unit such as the LCD display unit is usually 5 // m or even 7 // m. Generally, therefore, the height dimension h between the boundary interface of the adjacent concave curve and the bottom of the concave curve is preferably 1 // m or less. That is, the height dimension h is preferably less than 1/5 of the gap size of the display unit. When the above-mentioned height dimension h exceeds one-fifth of the gap size of the display unit, gap streaks occur prominently in the unit, and for example, color streaks (spots) occur in the liquid crystal display unit. In the above, the angle formed by the wiring of the concave curve and the display surface of the display f element is 0, and the maximum absolute value 角度 of this angle 0 is 0 n. For the paper size of the display surface, the Chinese National Standard (CNS) Α4 specification ( 210X297 mm) _ 8-531685 A7 B7 V. When the effective viewing angle of the display unit of the vertical line of the invention (6) is 0 t, the above 0 n is about 1/2 of 0 t. When the concave shape of the reflecting surface is set as described above, that is, because of the relationship between the effective viewing angle of the display unit, the range of the brightness of the reflected light can be increased, and the contrast ratio of the display unit may be increased. . Furthermore, the manufacturing method of the reflecting device of the present invention is to manufacture a method for using an optical device for a display unit, with There are: a process of forming an optical surface with fine unevenness on its surface to form an original plate; and a process of forming a metal film on the optical surface of the original plate, peeling the metal film to form a replica, and the surface of the replica The shape is transferred to the substrate, and the process of forming the same unevenness on the surface of the substrate as the optical surface of the original plate and the process of forming a reflective metal film on the uneven surface of the substrate are its characteristics. For example, there is a process of attaching the replica to the surface of the roller, heating the roller to a predetermined temperature, rolling the replica on the surface of the substrate, and transferring the uneven surface on the surface of the substrate. Printed by the Consumers' Cooperative of the Central Standards Bureau of the Ministry of Economic Affairs (please read the notes on the back before filling this page). A suitable example of the present invention is to process fine grooves concentrically on the original plate to form an optical with unevenness The concavo-convex surface is formed on the replica, and the concavo-convex surface having the concentric shape is transferred to the surface of the substrate to form a reflective surface. In the manufacturing method of the reflection device of the present invention, since an uneven optical surface is formed on the original plate, and it is transferred to the substrate through a replica, it can be formed with a high precision p with a predetermined reflection directivity. A reflective surface on the substrate surface. This paper size applies the Chinese National Standard (CNS) A4 specification (210X297 mm) _ 9-531685 A7 B7 V. Description of the invention (7) Also in the above, the uneven surface processed on the original plate and the reflective surface transferred on the substrate surface The cross section is preferably a shape formed by the fine concave curves side by side. From the above, the shape of the fine concave curve of the optical design is centered on the vertical line of the reflecting surface. The brightness of the reflected light can be increased within the specified angle range. A continuous predetermined concave curve is 1. In the case of groups, it is preferable that the concave curves of different pitches are included in the above-mentioned one group, and the concave curve of the above-mentioned one group is 1 unit, and it is appropriate to repeatedly form it. At this time, the width of the concave curve of group 1 is preferably 120 or more. As described above, the width of the concave curve is changed regularly or randomly in a range of a width dimension of 1 2 0 // m or more, and the above width dimensions are grouped into one group, and repeated, thereby preventing the Occurrence of streaks caused by the interference of reflected light or the phenomenon of interference fringes showing rainbow-like light. ○ Printed by the Consumer Cooperatives of the Central Standards Bureau of the Ministry of Economic Affairs (please read the precautions on the back before filling this page). When the grooves forming the concave-convex surface are formed in a concentric circle shape, the directivity of the optical setting of the brightness of the reflected light is not only along the direction orthogonal to the cross-section of the groove (X direction in FIG. 6), but also with the cross-section In the orthogonal direction (Y direction), the brightness distribution of the reflection direction can be set within a predetermined angle centered on the vertical line of the reflecting surface, thereby expanding the range of high brightness of the reflected light. Furthermore, the display device manufactured by the manufacturing method of the present invention is provided in a state where the reflection surface of the display unit is opposite to the display surface side and the opposite side of the display unit is facing the unit side, or the reflection device is inside the display unit. This paper size applies Chinese National Standard (CNS) A4 specification (210X297 mm)-10-531685 * A7 B7 _ V. Description of the invention (9) Reflection, through the above reflected light, can visually correspond to the transmission of liquid crystal materials Through the contrast display. Furthermore, the reflecting device 10 may be a transflective type, and a backlight device (backlighting) may be provided on the back surface of the liquid crystal display unit 1. At this time, if the backlight device is not turned on, the brightness of the display content is ensured by the reflected light of the reflection device 10, and the display brightness is obtained by the light of the backlight device at night. In the present invention, the reflecting device of the present invention can also be used as the reflecting surface of a backlight device provided on the back surface of the liquid crystal display unit 1. 6A and 6B are plan views of the reflection device 10. The reflection device 10 is a reflection film of aluminum or the like on the surface of a thin film (substrate film) having a thickness of more than 10 // m, preferably more than 10 // m and less than 1000 // m. To form a reflective surface. In the total reflection type reflection device 10, a thin film (substrate film) is made of hard vinyl chloride or the like. When a transflective reflecting device 10 is to be constructed, the thickness of the reflective metal film is about 50 0A (Angstrom = 10 to 1Qm). Printed by the Consumers' Cooperative of the Central Standards Bureau of the Ministry of Economic Affairs (please read the precautions on the back before filling this page). The reflective surface on the surface of the above-mentioned sheet (substrate film) is formed with a fine concave G adjacent to it. Fig. 6A shows that the above-mentioned concave surface G is a stripe-shaped parallel extension in the Y direction, and Fig. 6B shows that the above-mentioned striped-like concave surface G is concentrically curved. Fig. 3 is a cross-section (Fig. 6-II-Section of Fig. 6) which extends the enlarged surface of the reflecting device 10 in a direction orthogonal to the concave surface G of the stripe. Fig. 1 is an enlarged view of a part of Fig. 3 Shown in p section. As shown in the enlarged sectional views of FIGS. 1 and 3, the paper size of the reflecting device 10 is applicable to the Chinese National Standard (CNS) A4 specification (210X297 mm) 531685 A7 B7 V. Description of the invention (10) The structure is a sheet (Substrate film) The surface of 1 1 is used as the reflective surface 12, but here the reflective surface 12 forms an adjacent concave surface G. When viewed from the cross section, the reflective surface 12 of the concave surface G is a concave curve, and more specifically, it has a circular arc shape with a specified radius r (for example, r 2 2 // // m). FIG. 3 is an enlarged view of a section (m-m section in FIG. 6) of the reflecting device 10 that extends in a direction orthogonal to the stripe-shaped concave surface G. As shown in FIG. Figure 1 is a partial enlargement of Figure 3. Shown in the same section. As shown in the enlarged sectional views of FIGS. 1 and 3, the structure of the reflecting device 10 is that the surface of the sheet (substrate film) 1 1 is used as the reflecting surface 12. Whereas, the reflecting surface 12 forms an adjacent concave surface G, and when viewed from the cross section, the reflecting surface 12 of the part of the concave surface G is a concave curve, in more detail, it becomes a predetermined radius r (for example, r = 2 5 // m). Printed by the Consumers' Cooperative of the Central Bureau of Standards of the Ministry of Economic Affairs (please read the precautions on the back before filling this page). As shown in Figure 1, a concave G is viewed as the concave curve of its cross section in the direction of the display surface (X direction : The direction of the horizontal line), divided into 1, 2, 3, ..., j, ... η by a unit of length 800 A, and orthogonally intersects the radius of the boundary point extending from the center of curvature of the arc shape 0 to the above-mentioned interval The (normal) wiring is S i, S 2, ... S j, ... S η. The absolute value 値 of the angle (inclination angle) formed by each contact S :, S 2 ... and the horizontal line 値 is Q i, Q 2, Q 3, ..., Q j, ... Q η. The sign of the positive and negative of these angles is "negative" for the horizontal line Η when the wiring S is oriented in the clockwise direction, and for the horizontal line Η when the wiring S is oriented in the anticlockwise direction, it is "positive". Figure 2 shows the | S oblique angle 0 of the above wiring on the horizontal axis. This inclination angle indicates the wiring S i which is divided by each 80 0 A. The paper size is applicable to the Chinese National Standard (CNS) A4 specification (210X297 mm) -13-531685 A7 B7 V. Description of the invention ( 11) The angle formed by S 2, ... sj, ... S η and the horizontal line Η. The vertical axis represents the frequency of the number of inclination angles 0 formed by the above-mentioned wires S i, S 2, ... S j, ... S η and the horizontal line Η. As shown in Figure 1, when the cross-sectional shape of the concave surface G is an arc curve, the frequency of the inclination angle 0 of the contact point of each point when the horizontal direction (X direction) is divided at equal intervals is on each concave surface. One is "1". And the range of the inclination angle is from Θ i to 0 η, the boundary on the negative side is 0 i, and the boundary on the positive side is θ η. Therefore, the concave surface G of the arc-shaped concave curve of the cross section is formed adjacently. The reflection surface 12 or the range of the inclination angle is as described above 0 i to 0 η. The frequency of each number of inclination 値 is proportional to the number of the concave surface G, and the curve i showing the frequency in the line graph of FIG. 2 is Showed a columnar shape in the longitudinal direction. Printed by the Consumer Cooperative of the Central Standards Bureau of the Ministry of Economic Affairs (please read the precautions on the back before filling this page) On the other hand, when the reflective surface extends in the X-direction flat mirror surface, the wiring of the reflective surface is formed by the horizontal line Η The angles are all 0 degrees. Other angles do not exist. In Fig. 2, the frequency of the angle formed by the wiring on the mirror surface is shown in curve ϋ. When the plane of the reflective surface extending in the X direction is white paper or a rough surface, the inclination angle formed by the wiring of the rough surface of the rough surface and the horizontal line 即 is uniform within a range of 0 degrees to ± 90 degrees. To appear frequently. The curved surface showing the frequency of the inclination angle of the white paper or rough surface in FIG. 2 is shown as iii. It is assumed that parallel light is incident on the reflecting surface (horizontal line Η) in a vertical direction and the light is reflected on the reflecting surface. As shown in FIG. 5A, the angle range that can improve the brightness of the reflected light is the reflecting surface of the reflecting device 10. When the vertical line V is determined as soil α, the angle α is about twice the range of the inclination angle of the wiring of the concave p line. Therefore, the paper size of the present invention indicated by i in FIG. 2 applies the Chinese national standard (CNS ) A4 specification (210X297mm) ΛΛ one 531685 A7 B7___ V. Description of the invention (12) When the reflecting surface is 12, the angle range that the brightness can be improved is "2 times the range of 01 ~ θη, which is the soil 2 X Or ± 2 X 0η. For example, -15 degrees, when θη is +15 degrees, that is, the angle range in which the brightness of the reflected light can be increased. * Soil α is about 30 degrees. Therefore, 0 1, ~ 0 η are combined. Designing at the effective viewing angle of the liquid crystal display unit 1 can increase the brightness of the reflected light in the effective field of view of the liquid crystal display unit 1 to improve the display contrast and ratio. That is, the above wiring S :, S 2 ... The absolute value of the maximum inclination angle is θ η ′ When the angle of the vertical line V of the effective field of view of the liquid crystal display unit is 0 t, it is appropriate to set 0η to about 1/2. On the other hand, in FIG. 2, the reflecting surface is extended to a horizontal line as shown by ϋ. When the mirror surface is flat, the image will be formed on the reflective surface. It is not suitable as a reflective device for the display unit. When the reflective surface is white paper or rough surface, as shown in Figure iii, the frequency of the tilt angle of the reflective surface The range is wide and the frequency of each angle becomes low, so it is impossible to increase the brightness of the reflected light in the range of the effective viewing angle of the display unit. Printed by the Consumer Cooperatives of the Central Standards Bureau of the Ministry of Economic Affairs (please read the precautions on the back before filling out this Page) Also in Figure 1, because the concave curve is drawn geometrically, the boundary point a of the adjacent concave surface G becomes an acute edge. However, this boundary point a does not form an edge, but it can be made small. The curve shape of the curvature is. When the boundary point a is turned upwards as shown in the figure, the frequency of the inclination angle of the wiring of the reflecting surface is slightly changed from that in FIG. 2i, and the inclination angle becomes 0 degree and Near The frequency of the noise becomes higher, but the characteristics of improving the brightness when the reflecting surface is viewed as a whole are still approximately the same as those shown in Fig. 1. The part of the edge a is formed into a curve with a large curvature. This paper size applies the Chinese National Standard (CNS) A4 specification (210X297 mm) ~ _ 彳 5_ 531685 A7 B7 5. The shape of the section shown in the description of the invention (13) can also be formed into a wavy curve (S i η curve), At this time, when the angles 0 i and 0 η, which are the boundary of the tilt angle, are set to a certain range based on the relationship of the effective viewing angle of the liquid crystal display unit, it is possible to increase the reflected light in the range of the effective viewing angle of the liquid crystal display unit. The brightness. In this case, the pitch of the concave curve shown in FIG. 1 is preferably less than 5 0 // m, for example, 1 0 // m to 1 4 is more suitable. If the pitch is too large, even if the reflective surface is formed equal to the concave mirror . Function to distort the displayed image. For another example, when continuous pitches are continuous from the concave curve at a pitch equal to or lower than 50 #m, a streak pattern or rainbow pattern appears due to the interference of reflected light from each concave surface G (each concave curve). In order to prevent the occurrence of such interference fringes of light, it should be tried to prevent the pitch of the concave curve within a certain range from becoming equal pitch. Fig. 3 shows the reflecting surface 12 for implementing such a countermeasure. The pitch between adjacent concave curves in Figure 3 is as follows: 1 0 // m, 1 1 // m, 1 2 // m, printed by the Consumer Cooperatives of the Central Standards Bureau of the Ministry of Economic Affairs (please read the note on the back first) Please fill in this page again for the items) 1 3 // m, 1 4 // m random changes or regular changes in order. And when a plurality of concave curves with different pitches are in one group, one group is used as one unit and it is formed side by side continuously. The width-inch method of a group of concave curve groups with different pitches (or the distance between the centers of curvature of the concave curve at the two ends of the group of concave curves of group 1) is preferably 1 2 0 // m or more, and It is most appropriate to use 1 4 0 // m or more. At this time, there will be a regular repetition of a group of concave curves above 1 2 0 // m, but if the width of 1 unit of this repeated concave curve group is 1 p 0 // above, it can be prevented The above-mentioned interference fringes of light also occur. This paper size applies Chinese National Standard (CNS) A4 (210X297 mm) -16-531685 A7 B7 V. Description of the invention (14) In the first group, the width is more than 1 2 0 // m. It is appropriate that the pitches of the curves are all different. However, as described above, for example, 5 kinds of pitches of 10 / m, 12 // m, 13 // m, and 14 // m are randomly arranged side by side, which can fully prevent the interference fringes. In order to prevent the occurrence of interference fringes of light, it is necessary to include at least two or more kinds of pitches in the above group. Also in this reflection device 10, due to the neighbor. The ground is provided with a concave curve, so the surface becomes a concave-convex shape, and the height dimension of this concave-convex is from the bottom of the concave curve to the height point h to the boundary point a of the concave curve. As shown in FIG. 5A, when the reflecting device 10 is disposed in the gap 4 of the liquid crystal display unit 1, if the height dimension h of the unevenness is too large, the gap stripes of the liquid crystal display unit 1 substantially occur. In order to prevent the deterioration of the display quality of the image caused by the gap stripes, the above-mentioned height h is preferably 1/5 or more of the gap size. Because in the conventional liquid crystal display unit, the gap size δ is in a range of 5 // m to 7 // m, the height dimension h is preferably 1 // m or less. Printed by the Consumer Cooperatives of the Central Standards Bureau of the Ministry of Economic Affairs (please read the precautions on the back before filling this page). Figure 4 shows the relationship between the height h of the above-mentioned unevenness and the maximum inclination angle of the inclination of the connection of the concave curve 値 0 n. As can be seen from the graph shown in FIG. 4, the height dimension h = r (1 — c 〇 s 0η). The condition to find h ^ l / zm in this example is that 0n is 1 6 when r = 2 5 / zm. Below 3 degrees. The pitch P of the concave curve is P = 2 X r · si η 0 η, 7 = 25 // m, 0η = 16 · 3 degrees, that is, the maximum 値 of the pitch q is 14 // m, so at r = 2 5 // m so that the height of the unevenness is less than 1 / zm. This paper size applies the Chinese National Standard (CNS) A4 specification (210X297 mm) _ 17-531685 A7 B7 V. The condition of the invention (15) is the pitch P is 1 4 // m or less. As described above, when viewing the reflective surface 12 in a cross section orthogonal to the concave surface G, the angle range of the inclination angles θ i, θ η, ... of the lines S i, S 2, ... of the concave curve is limited, so it is possible to reflect the light. The range of angles in which the luminance can be increased is set within a specified range of viewing angles. ,. As shown in FIG. 6A, the structure in which the Υ direction of the concave surface G extends in parallel stripes, that is, the X direction is obtained in the above. The reflected light can have directivity in the range where it can be increased, but this effect cannot be exerted in the Y direction. On the other hand, in the case shown in FIG. 6B, since the concave surfaces G extending in a stripe form are arranged on the concentric diagram, the directivity of the reflected light luminance can also be obtained in the Y direction. Therefore, when the concave surface G is to be formed, the structure of FIG. 6B is more suitable than that of FIG. 6A. In addition, when viewed from the plane shape shown in Fig. 6, the wavy continuity of the concave surface G may be continuous in the Y direction. Furthermore, it is possible to form a three-dimensional concave portion with a concave curve as shown in FIG. 1 or FIG. 3 in the cross section, for example, forming a spherical concave portion may improve the reflection of light in both the X direction and the Y direction. The brightness is within the range to make it directional. It is printed by the Consumer Cooperatives of the Central Bureau of Standards of the Ministry of Economic Affairs (please read the precautions on the back before filling this page). The following describes the manufacturing method of the reflection device 10 using the process diagram of FIG. In particular, the manufacturing method of the reflection device shown in Fig. 6B. In the process a of making the original plate in FIG. 7, a precision lathe machining is performed on the surface of the metal circular plate shown by reference numeral 20 to form concentric circular stripe concave surfaces G a. This concave surface G a is continuously processed by forming one group of concave curves with a predetermined number of 0 pitches different from each other as shown in FIG. 3. The size of this paper is applicable to China National Standard (CNS) A4 (210X297 mm) _ 18-531685 A7 B7 V. Description of the invention (16) For example, the original plate 20 is fixed to the processing axis of a precision machining lathe and rotated, Using a cutting tool made of a single crystal material at the front end to perform spiral cutting on the concentric groove G a, at this time, the advance speed of the turning tool is adjusted, and the pitch of the groove G a is shown in FIG. 3. A group of grooves with a random change or a predetermined number of pitches can be processed repeatedly. In this original plate 20, only a prescribed rectangular area 20a is used for manufacturing the reflection device 10. In the process of making a replica b, a master model of part 20a in the above field is made. In this process, a hard metal film (eg, hard nickel, film) is formed by electroforming on the entire surface of the original plate 20 or the rectangular area 20 a. The film is peeled off to form a replica. In the process C, the above-mentioned replica is attached to and fixed on a roller for pressure processing. Printed by the Consumer Cooperative of the Central Bureau of Standards of the Ministry of Economic Affairs (please read the precautions on the back before filling this page). During the embossing process, that is, on the surface of PET (poly terephthalate), etc., as a substrate (substrate film ) A hard vinyl chloride sheet is set, pushed on the roll and pushed, and the roll is heated at this time, and the above replica is set to a predetermined temperature (temperature near the glass transition point T g of the hard vinyl chloride) on the surface of the sheet The concave curved surface shown in FIG. 3 can be transferred. In the process of evaporating the reflective film, e.g., a reflective metal film such as aluminum is evaporated on the surface of the substrate (substrate film) to which the unevenness has been transferred to form a reflective surface of 12 °. (Reflection device 10) Also. This paper size applies to Chinese National Standards (CNS) A4 (210X297 mm) -19-531685 A7 B7 V. Description of the invention (17) (Please read the precautions on the back before filling this page) In accordance with this manufacturing method, the original The concave surface G a is processed on the plate 20 with high accuracy, so that a reflecting surface having predetermined optical characteristics as shown in FIG. 1 or 3 can be mass-produced with high accuracy. Another embodiment of the reflection device of the present invention will be described with reference to the drawings below Fig. 8. > The reflection device 30 shown in FIG. 8 is in the direction of the concave surface G of the reflection device 10 shown in FIG. 1 to FIG. 6. That is, the groove G X is formed in the Y direction in Fig. 6A. The groove G X extends in a direction along the concave surface G (concave curve). A plurality of stripe-shaped extending directions (Y directions) of the concave surface G are formed at intervals. The cross-sectional shape of this groove G X is formed similarly to the concave surface G formed on the above-mentioned reflecting device 10. That is, as shown in FIG. 1, the cross section is an arc curve, and the absolute absolute value of the angle formed by the connection between the arc surface and the horizontal plane is 6 > n, and the angle of the vertical line V for the effective field of view of the liquid crystal display unit is It will be about 1/2. The pitch of the above-mentioned groove GX (the distance between the centers of adjacent grooves) printed by the Consumer Cooperatives of the Central Standards Bureau of the Ministry of Economic Affairs is as shown in Figure 3 above. Its non-equal pitch is 5 0 # m and random. Formation is appropriate. Furthermore, it is preferable to use a predetermined number of grooves G x having different pitches as one group, and to form a repeated arrangement of the grooves G X of this group. The reflection device 30 obtained as described above can increase the luminance in the range of the effective viewing angle not only in the X direction 'but also in the Y direction. The reflection brightness is made directional in the whole range, and the reflection brightness within the range of the viewing angle of the display is increased, and the display contrast is improved. And because the paper size is randomly set, the Chinese national standard (CNS) A4 specification (210X297 mm) -20-531685 Α7 Β7 V. Description of the invention (18) The groove GX can be prevented from being caused by the setting of the groove GX The occurrence of interference fringes. Furthermore, in a display device using the reflection device of the present invention, the incident light (natural light or light from a fluorescent lamp) is usually not incident on the display surface from the perpendicular V direction, and is often incident obliquely from above. The direction of the user's eyes is the substantially perpendicular V direction. Figure 9 shows the above reflection devices 10 and 3. 0 vertical position, and the situation when viewed from the front. In the reflecting device 10 shown in FIG. 1 and the reflecting device 30 shown in FIG. 8, the concave curve of the cross section of the concave surface G is an arc curve. As shown in FIG. 9, the bottom line of the concave curve is H s, and the angle formed by the line H s and the horizontal line 〇 is 0 degrees. For this connection, the vertical line of the line H s is the center line of 0 1, that is, in the reflection device 10 and the reflection device 30, the concave curve extends the same length for the center line 0 1 and for the symmetrical direction. As shown in FIG. 9, the direction viewed by the user is parallel to the center line 0 1, and it is assumed that for the center line 0 1 and from the above, at an angle of 0 t (for example, 30 degrees), Reflecting surface 1 2 incident parallel light 〇 Printed by the Consumer Cooperative of the Central Standards Bureau of the Ministry of Economic Affairs (please read the precautions on the back before filling out this page) At this time, above the center line of the concave curve above 0 1 The incident light ranging from L 1 to L 2 in the obliquely upward parallel light, and the reflected light for this incident light is the range from L 1 > to L 2 /. From the above-mentioned reflected light L 1 / to L 2 /, it becomes a person who shines in the direction of the / 3 field. Chasing will become a light that looks downwards. Relative to its parallel from the lower half of the centerline 0 1 and from the obliquely upwards, the paper size applies the Chinese National Standard (CNS) A4 specification (210X297 mm) _ 21-531685 A7 B7 V. Description of the invention (19) The range from L 2 to L 3 of the light becomes incident light, and the reflected light thereof becomes a range from L 2 / to L 3 /. The direction of the light ranging from the reflected light L 2 > to L 3 / is the α area, which is the direction toward the line of sight. In the above, for example, the irradiation range / 3 of the reflected light in the upper half is compared with that in the lower half. In the case of the irradiation range α, the area α can guide the reflected light to the range of the effective viewing angle, thereby increasing the brightness. phase. Anti-ground irradiation range / 3 light, that is, there is not much to contribute to the increase of the brightness of the effective viewing angle. Therefore, in the case of a reflection device such as a liquid crystal display device which needs to improve the reflection function of light from an obliquely upward direction, it is in a concave curve of a concave section. It is more suitable to form a concave surface G having a center line 0 1 and a lower portion longer than the upper portion, so that it is symmetrical to the center line 0 1 and has the same length. Furthermore, when the reflection surface is formed as a continuous slightly jagged reflection surface only from the lower half of the center line 0 1 of the concave surface G, a reflection device 40 which can further improve the brightness within the effective viewing angle range can be obtained. Printed by the Consumers' Cooperative of the Central Standards Bureau of the Ministry of Economic Affairs (please read the precautions on the back before filling this page). Figure 10 shows an example of the above-mentioned reflection device 40. It is formed by the continuous formation of a slightly jagged concave surface G / formed by a semi-concave curved line (semi-circular curve). At this time, the 1 pitch is two parts of the adjacent concave surface G > and the size of the 1 pitch is still below 50 μm for the reasons mentioned above, for example, 1 0 to 1 4 // m is more appropriate. It is expedient. Furthermore, the above-mentioned reflecting device 40 is also halo. As described above, when a continuous predetermined number of concave curves is used as a group, the above-mentioned group also includes the paper standard applicable to the Chinese National Standard (CNS) A4 specification. (210X297 mm) -22-531685 A7 _____B7 V. Description of the invention (2) The pitch of the concave curve is different. Furthermore, it is preferable that the concave curve of each of the above-mentioned groups is formed in units of one unit. At this time, the width of the concave curve of group 1 is (please read the precautions on the back before filling in this page) 1 2 0 // m or more is appropriate. As described above, for example, changing the width of the concave curve regularly or randomly with a width range of 1 2 0 // m or more, and repeating it with the above width size as a group can prevent the reflection of light. The interference fringes caused by the interference of the light showing a streaky pattern or a rainbow pattern. FIG. 11 is another example of the improvement of the reflection device 40 described above. The reflecting device 50 has the same structure as the groove GX shown in FIG. 8, that is, on the above device 50, a groove G / X having a concave surface shape is provided along the concave curve of the concave surface G > By. On the other hand, the reflection devices 30, 40, and 50 obtained as described above may be manufactured by the same device method as that of FIG. First, when the reflecting device 40 shown in FIG. 10 is manufactured, that is, when the original plate is manufactured and printed at 20 by the Consumer Cooperative of the Central Standards Bureau of the Ministry of Economic Affairs, the shape of the concave surface may be slightly jagged. When a reflecting device having the grooves GX or G / X of FIGS. 8 and 11 is manufactured, that is, after the concave surface G a is formed on the original plate 20 shown in FIG. 7, the grooves that are orthogonal to the striped concave surface G a are graded and processed. Yes. The reflection device of the present invention is not limited to the above-mentioned embodiment. For example, the groove shown in FIG. 8 may be similarly formed in the concentric circular reflection device 10 shown in FIG. 6B. Also in FIG. 6B, the concave surface G / can be made into the cross-sectional shape shown in FIG. (Effects of the invention) This paper size applies the Chinese National Standard (CNS) M specification (210x297 mm) -23-531685 A7 B7 V. Description of the invention (21) As mentioned above, according to the present invention, it can be made available. There is directivity in the range of increasing the brightness of the reflected light, and it can be made that the effective viewing angle range of the display unit such as a liquid crystal display unit and the above-mentioned range of angles that can increase the brightness are designed, and the pitch of the concave curved surface The combination can prevent the occurrence of interference fringes of light. ,. In addition, after the uneven surface is transferred on the substrate surface, a metal reflective film is vaporized to produce a thin reflective substrate by mass production. . When the display device according to the present invention is used, the brightness of the emitted light can be increased within the range of the effective viewing angle, so the contrast of the viewing field can be improved. Brief Description of Drawings Fig. 1 is an enlarged sectional view showing a sectional shape of a reflecting surface of a reflecting device of the present invention. Fig. 2 is a graph showing the relationship between the frequency of the inclination angle of the wiring on the reflecting surface shown in Fig. 1 and the frequency of the angle of the wiring on a flat mirror and a white paper. Printed by the Employees' Cooperative of the Central Standards Bureau of the Ministry of Economic Affairs (please read the precautions on the back before filling out this page). Figure 3 is an enlarged cross-sectional view of the reflective surface showing the different shapes of the concave curves. Fig. 4 is an explanatory diagram showing the relationship between the curvature radius of the concave curve, the angle of the connection of the concave curve, and the height dimension of the concave and convex. Figures 5A and 5B are enlarged sectional views showing the mounting relationship between the display unit and the reflection device. Figures 6A and 6B are plain p-pictures of the reflecting device. Fig. 7 is an explanatory diagram showing a manufacturing process of the reflecting device. This paper size applies the Chinese National Standard (CNS) A4 (210X297 mm) -24-531685 A7 B7 V. Description of the invention (22) Figure 8 is a perspective view showing an embodiment of the reflection device of the present invention. Figure 9 It is an explanatory diagram showing the relationship between incident light and reflected light of the reflection device of the present invention. Fig. 10 is an enlarged sectional view showing another embodiment of the reflection device of the present invention. Figure 11 shows the reflective device of the present invention. An oblique view of other embodiments. (Please read the precautions on the back before filling out this page) Printed by the Consumer Cooperatives of the Central Bureau of Standards of the Ministry of Economic Affairs (label description) 1 LCD display unit 2, 3 Glass substrate 4 Cell gap 10, 3 0 Reflective device 4 0, 5 0 Reflective device 11 Substrate 1 2 _Reflective surface G, G ^ Concave / GX, G / X groove This paper size is applicable to China National Standard (CNS) A4 (210 X 297 mm) -25 ·