554374 經濟部智慧財產局員工消費合作社印製 A7 B7 五、發明説明（1 ) (發明之背景） 本發明有關於陰極射線管，特別是有關於當對於在螢光 屏內面之螢光面投射有電子射束時，可考慮顯示於螢光面之 晝像之暉度之全面均一性，改良了螢光屏之曲面形狀之陰極 射線管。 一般而言，陰極射線管之玻璃製外圍器係由：備有曲面 形狀之螢光屏之面板部，及細直徑之管頸部，及連接面板部 與管頸部之略漏斗狀之錐體部所構成。在螢光屏之內面形成 有螢光面，在管頸部之內面裝置有電子鎗，在錐體部之外周 裝置有偏向軛，由而構成陰極射線管。此時由於陰極射線管 之玻璃製外圍器之內部乃大致上成真空狀態，外部經常有大 氣壓之施加，因此必須備有一定値以上之機械強度，所以將 玻璃製外圍器之各部份之料厚設定於可耐受該機械的強度之 値。並且習知之陰極射線管中，通常玻璃製外圍器之螢光屏 之構成係，周邊部份之料厚係比螢光屏之中央部份之料厚爲 厚而構成。 圖1 1係顯示，習知之陰極射線管之玻璃外圍器部份之 構成之一例之剖面圖。 圖11中，31係螢光屏，31 (1)係螢光屏內面， 31 (2)係螢光屏外面，tpc係螢光屏31之中央部份 之料厚，t p a係螢光屏3 1之周邊部份之料厚，Rp i係 以電子射束之偏向中心點0爲中心之螢光屏內面3 1 ( 1 ) 之曲率半徑，R p 〇係電子射束之偏向中心點〇爲中心之螢 光屏外面3 1 ( 2 )之曲率半徑。 ---------dll·-----IT------ά (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 ) A4規格（210X297公釐） -4 - 554374 A7 B7 五、發明説明（2 ) (請先閲讀背面之注意事項再填寫本頁) 如圖1 1所示，螢光屏3 1乃爲了維寺上述機械強度起 見，使周邊部份之料厚t p a較中央部份之料厚t p c爲厚 ’該結果，螢光屏內面31(1)之曲率半徑Rpi較螢光 屏外面3 1 ( 2 )之曲率半徑小的被構成，即 tpcCtpa 且 Rpi<Rpo 〇 上述之習知之陰極射線管乃，由於螢光屏3 1之中央部 份之料厚t p c較薄。周邊部份之料厚t p a厚，所以對於 形成於螢光屏3 1之內面之螢光面上顯示畫像時，由螢光面 經過螢光屏3 1放射於外部之光乃，在料厚t p c較薄之螢 光屏3 1之中央部份之減衰少，而料厚t p a厚之螢光屏 3 1之周邊部份之減衰會多，換言之螢光屏3 1之中央部份 之光透過率爲Tp c，周邊部份之光透過率爲Tp a，即 Tp c >Tp a。顯示畫像之暉度乃周邊部份者較螢光屏 3 1之中央部之暉度降低，構成在於周邊部無法充分的確保 顯示畫像之暉度之問題。又由於在畫面周邊即較畫面中央而 螢光體之重量會變小等緣故，更會使暉度劣化。 經濟部智惡財產局g(工消費合作社印製 按當螢光屏31之周邊部份之顯示畫像之暉度較中央部 份之顯示晝像之暉度有降低之情形時，如欲將周邊部份之顯 示畫像之暉度補正到相當於中央部份之顯示暉度起見，令投 射於螢光面周邊部份之電子射束之強度加強到較投射於螢光 面之中央部份之電子射束之強度爲大就可以，惟此種電子射 束強度之補正手段並非簡單的可以獲得。 再者，通常在陰極射線管中，爲了盡量減少自偏向軛之 洩漏磁場起見，採取減低供給於偏向軛之偏向電壓之手法， -5- 本紙張尺度適用中國國家楯準（CNS ) A4規格（2】〇Χ29：7公釐） 經濟部智慈財產局員工消費合作社印製 554374 A7 B7 五、發明説明（3 ) 惟由於最近偏向角大之陰極射線管增多，供給於陰極射線管 之偏向軛之偏向電壓乃隨著偏向角之變大而會增大，因此在 現在之習用之陰極射線管中減少供給於偏向軛之偏向電壓已 很困難，由而具有無法減少自偏向軛之洩漏磁場之問題。 本發明係爲了解決上述之問題所開發，提供一種，以簡 單的構成手段即可以令螢光屏之周邊部份之顯示畫像之暉度 可比美於中央部份之顯示畫像之暉度之陰極射線管者。 再者，本發明之其他目的係提供一種，偏向角大之情形 下，可以減低供給於偏向軛之偏向電壓，由而可能減少自偏 向軛之洩漏磁場之陰極射線管者。 (發明之槪說） 爲了達成上述目的，依本發明之陰極射線管乃，將螢光 屏之曲面形狀規定爲，內面曲率半徑與外面曲率半徑相比較 時，同等或其以上，且將黑矩陣之透過率規定爲某一規定範 圍。 依上述手段時，由於螢光屏之曲面形狀乃，該內面之曲 率半徑大於該外面之曲率半徑，所以在螢光屏上之中央部份 之料厚與周邊部份之料厚之差距變小，中央部份之料厚會較 周邊部份之料厚變厚，因此可以促螢光屏之周邊部份之顯示 暉度提昇到與中央部份之顯示暉度水準。並且該黑矩陣之孔 透過率不必要在畫面周邊過度的提昇，因此不會招至在畫面 周邊之解像度之大幅度之劣化，可以獲得色純度良好之陰極 射線管。 ---------衣—^-----1T------ά (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 ) Α4規格（210Χ297公釐） -6- 經濟部智慧財產局員工消費合作社印製 554374 A7 B7 五、發明説明（4 ) 又依上述手段時，該螢光屏之曲面形狀乃，該內面之曲 率半徑將大於習知之陰極射線管之面板部之螢光屏之內面之 曲率半徑爲大，因此自電子射束之偏向中心點到形成於螢光 屏內面之螢光面周邊部份爲止之距離會長於習知之陰極射線 管之同距離，所以該份量地使偏向軛之電子射束之偏向角變 小，可以減低供給於偏向軛之偏向電壓，以資減來自偏向轭 之洩漏磁場也。 (合宜之實施形態之說明） 在本發明之實施形態中，陰極射線管乃由：於曲面形狀 之螢光屏內面形成了螢光面之面板部，及於其內部裝置有朝 螢光面放射電子射束之電子鎗之管頸部，以及連接面板部及 管頸部，而在其外周將裝置偏向軛之錐體部所構成。而該螢 光屏之曲面形狀即被形成爲，其內面曲率半徑係與外面曲率 半徑同等或其以上者。 依本發明之實施形態時，將陰極射線管之螢光屏之曲面 形狀設爲，內面之曲率半徑使之與外面之曲率半徑大致同等 或較它爲大之構成，所以螢光屏之周邊部份之料厚乃與中央 部份之料厚相比較時，成爲同等或較薄，該結果使螢光屏之 周邊部份之顯示畫像之暉度增大，可以使周邊部份之顯示畫 像之暉度接近於中央部份之顯示畫像之暉度。 再者，依本發明之實施形態時，該內面之曲率半徑乃與 習知之陰極射線管之面板部螢光屏之內面之曲率半徑相比較 時變大，由而該自電子射束到形成於螢光屏內面之螢光面之 ---------衣I-=-----、玎------^ (請先閲讀背面之注意事項再填寫本頁) 本纸張尺度適用中國國家標準（CNS ) A4規格（210X297公釐） -7- 554374 A7 B7 五、發明説明（5 ) (請先閲讀背面之注意事項再填寫本頁) 周邊部份爲止之距離係與習知之陰極線管之同距離成爲稍微 長，所以該變長份量地，在偏向軛之電子射束偏向角可以小 ，該結果可以減低供給於偏向軛之偏向電壓，由而可減少由 偏向軛之洩漏磁場之發生量。 具體的說，乃分別具有下述之構成之陰極射線管也。 (1 )當螢光屏部之內面及外面之，連接畫面中央及畫 面對角方向周邊之等値（等價）曲率半徑分別係RD I ， RD〇，畫面中央之面板部料厚爲t c時，構成RD〇一 t c<RD I之關係。畫面對角方向周邊之BM (黑色矩陣 )孔透過率乃中央之110%以下。 (2 )在螢光屏部之內面與外面之連接畫面中央與畫面 長軸方向之等價曲率半徑分別爲RH I ，RHO，畫面中央 之面板部料厚爲t c時，有RHO - t c<RHI之關係， 畫面長軸方向周邊之BM孔透過率爲中央之11〇%以下者 〇 經濟部智慧財產局員工消費合作社印製 (3 )在螢光屏部之內面及外面之，連接畫面中央與畫 面對角方向周邊之等價曲率半徑分別爲RD I ，RDO，畫 面中央之面板部料厚爲t c時，有RDO— t c与RDI之 關係， 晝面對角方向周邊之BM孔透過率爲中央之7 0%以上 1 1 0 %以下。 (4 )螢光屏部之外面係呈平坦狀，晝面之對角方向周 邊之面板部玻璃料厚乃較畫面中央者爲薄，BM孔透過率乃 在晝面對角方向周邊而爲畫面中央之110%以下， -8- 本紙張尺度適用中國國家標準（CNS ) A4規格（210X297公釐） 554374 A7 B7 五、發明説明（6 ) (請先閲讀背面之注意事項再填寫本頁) (5 )螢光屏部之內面係呈平坦狀，畫面之對角方向周 邊之面板部玻璃料厚乃較畫面中央者爲薄，BM孔透過率乃 在畫面對角方向周邊而爲畫面中央之11〇%以下， (6 )在面板部內對向配置於螢光面地安裝有遮蔽屏（ Shadow-mask)，螢光面乃由以黑矩陣（Β ·Μ)所圍繞之 複數之螢化體畫素所形成，螢光屏部乃其外面形狀係非球面 ，該螢光屏部之玻璃料厚即，與螢光面之中央部比較時，對 角方向周邊部之料厚較薄。 (7 )螢光屏部乃其內面形狀係非球面，此螢光屏部之 玻璃料厚乃與螢光面之中央部相比較時，對角方向周邊部之 料厚較薄。 (8 )螢光面乃由，以黑矩陣所圍繞之複數組之分別對 應於3組電子射束之三色之螢光體三圓點組所形成，該螢光 體3圓點組乃在螢光面之中央部而以0 · 2 6 m m以下之間 隔所配置，螢光屏部即，該玻璃料厚爲，與螢光面之中央部 相比較時，對角方向之周邊部之料厚較薄。 經濟部智慈財產局8工消費合作社印製 組合上述（1 )〜（8 )之至少一個構成及下述構成之 至少一個即可以獲得更優異之效果。 (9 )對角方向周邊之上述BM孔透過率乃較該晝面中 央者小。 (1 0 )長軸方向周邊之上述BM孔透過率乃較該畫面 中央者小。 (1 1 )於螢光屏部之內面及外部之，連接畫面中央與 畫面短軸方向周邊之等價曲率半徑分別爲R V I ，R V 0， -9 - 本紙張尺度適用中國國家操準（CNS ) A4規格（210X297公釐） 554374 A7 B7 五、發明説明（7 ) 畫面中央之面板部料厚爲t c時，有RV〇 —t c -RV I 之關係。 (請先閲讀背面之注意事項再填寫本頁) (1 2 )面板部之材料之光透過率係略一般色調。 (1 3 )面板部之材料之光透過率係略深暗色調。 (1 4 )畫面之對角徑爲大約4 6 cm或以上。 (1 5 )畫面中央之點節距爲大約〇 · 2 6 m m或以下 〇 (1 6 )偏向角大約1 0 0 °或以上。 (1 7 )畫面對角方向周邊之遮蔽屏透過率乃中央之遮 蔽屏透過率之1 1 0%以下。 (1 8 )畫面對角方向周邊之遮蔽屏透過率乃較中央之 遮蔽屏透過率爲小。 (1 9 )畫面對角方向周邊之點節距乃晝面中央之點節 距之1 1 0 %以下。 (2 0 )畫面對角方向周邊之點節距乃晝面中央之點節 距之1 0 5 %以下。 經濟部智慧財產笱員工消費合作社印製 (2 1 )畫面對角方向周邊之BM透過率乃中央之9 〇 %以上1 1 0 %以下。 (2 2 )畫面之短軸方向周邊之面板部料厚係與該畫面 中央者同等或大於它。 下面參照圖面說明本發明之實施例。 圖1乃顯示本發明之陰極射線管之一實施例之要部構成 之斷面圖。顯示該陰極射線管爲彩色陰極射線管之例子。 圖1中，1係面板部，1 A係螢光屏，1 B係面板周邊 -10- 本紙張尺度適用中國國家標準（CNS ) A4規格（210X297公釐） 554374 A7 B7 五、發明説明（8 ) (請先閲讀背面之注意事項再填寫本頁) 部，2係管頸部，3係錐體部，4係螢光膜，5係遮蔽屏， 6係內部遮蔽，7係偏向軛，8係色純度調整磁鐵，9係中 央射束靜態聚焦調整用磁鐵，1 0係側射束靜態聚焦調整用 磁鐵，1 1係電子鎗，1 2係電子射束。 構成彩色陰極射線管之玻璃製外圍器（管）係由配置於 前側之大管項之面板部1，及在其內部收納有電子鎗 1 1之組長之管頸部2，及連接面板部1及管頸部2之略漏 斗狀之錐體部3所構成。面板部即備有前面之螢光屏1 A及 連接於錐體部之周緣部1 B所構成。在螢光屏1 A之內面被 著形成有螢光膜4，而對向配置於螢光膜4地安裝有遮蔽屏 5 ° 經濟部智慧財產咼員工消費合作社印製 在面板部1與錐體部3之結合部份之內側設有內部磁性 遮蔽6，在錐體部1與錐體部3之結合部份之外側即在使用 時配置有偏向軛7。由電子鎗1 1所放射之三條之電子射束 1 2 (只圖示1條）之在偏向軛7而被偏向於規定方向之後 ，通過遮蔽屏5而射碰於螢光膜4。又於管頸部2之外側並 設配置有色純度調整磁鐵8，中央射束靜態聚焦調整用磁鐵 9，側射束靜態聚焦調整用磁鐵1 0。 依上述構成之彩色陰極射線管之動作即畫像顯示動作乃 與習知之彩色陰極射線管之畫像顯示動作相同，所以對於此 彩色陰極射線管之畫像顯示動作即省略其說明。 接著圖2乃顯示，在圖1所圖示之實施例之彩色陰極射 線管之面板部1之螢光屏1 A部份之構成之斷面圖。 圖2中，ΙΑ(1)係螢光屏內面，1A(2)螢光屏 本紙張尺度適用中國國家標準（CNS ) A4規格（210X297公釐） _ ” 554374 A7 B7 五、發明説明（9 ) (請先閱讀背面之注意事項再填寫本頁) 外面，t c係螢光屏1 A之中央部份之料厚，t a係螢光屏 1A之周邊部份之料厚，R i係螢光屏內面1A ( 1 )之曲 率半徑，R〇係螢光屏外面1A (2)之曲率半徑，其他與 圖1所示之構成構件之同一構件即標上相同之標號。又本例 中，上述螢光屏1 A之中央及周邊部份之料厚t c及t a乃 表示各個部份之螢光屏內面ΙΑ(1)及外面1A(2)之 最短距離。 又通常螢光屏之曲率半徑乃其內面、外面均與螢光屏之 料厚比較時顯著的大，因此對於螢光屏1 A之周邊部份之料 厚t a即，可以用，與管軸方向平行之螢光屏內面1A ( 1 )及外面1A (2)之距離來替用。 經濟部智慧財產局R工消費合作社印製 如圖2所示，本實施例之螢光屏1 A乃，將螢光屏 ΙΑ (1)與螢光屏外面1A (2)之曲率半徑Ro之關係 成爲RoSR i + t c，而使螢光屏周邊部之料厚t a與中 央部之料厚t c大致同等或比較薄。本例中所謂螢光屏周邊 部乃如圖3所示之對應於被著形成於螢光屏內面1 A ( 1 ) 之螢光膜4之螢光體點或條之領域，即顯示晝像之有效晝面 1 1 1之周邊部也。 本實施例之面板部1之螢光屏1 A乃經下述之程序所設 計。 首先於步驟S 1而規定螢光屏1 A之螢光屏外面1 A ( 2)之曲率半徑Ro。 接著於步驟S 2中，設定螢光屏1 A之中央部份之料厚 本紙張尺度適用中國國家標準（CNS ) A4規格（210X297公着) :12 - " ~^--— 554374 A7 B7 五、發明説明（10) 於步驟S 3將螢光屏1 A之周邊部份之料厚t a設定爲 於前步驟S 2所設定之中央部份之料厚t c同等或較薄。 (請先閲讀背面之注意事項再填寫本頁) 接著於步驟S 4設定可滿足於前步驟S 2及步驟S 3之 中央部份之料厚t c及周邊部份之料厚t a之螢光屏內面 1 A ( 1 )之曲率半徑R i 。 於後續之步驟S 5中，實施具有在前面之步驟s 4及步 驟S 1中分別設定之螢光屏內面1A ( 1 )之曲率半徑R i 及螢光屏外面1 A ( 2 )之曲率半徑R 〇之面板部1之螢光 屏1 A之所須之強度計算。 接著於步驟S 6中，判斷前面之步驟S 5中所實施之強 度計算結果爲所須値以上時，即完成具有螢光屏內面 ΙΑ (1)之曲率半徑Ri及螢光屏外面1A (2)之曲率 半徑R 〇之面板部1之螢光屏1 A之設計，另一方面判斷強 度計算結果爲所須値以下時回至前面之步驟S 3，再度實施 步驟S 3以後之處理。 經濟部智慧財產局S工消費合作社印製 具有如上述而獲得之面板部1之螢光屏1A之彩色陰極 射線管乃，由於螢光屏1 A之周邊部之料厚t a被形成與中 央部份之料厚t c同等或稍薄狀，所以可以使畫面周邊之光 透過率使之與晝面中央之透過率大致同等或更大，所以可以 使畫面全體之暉度更趨於均一。 補償中央與周邊之暉度差之方法係可以提出將黑矩陣（ BM)之孔透過率，以周邊者較中央者提高之手法，554374 Printed by the Consumer Cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs A7 B7 V. Description of the Invention (1) (Background of the Invention) The present invention relates to cathode ray tubes, and in particular, to the projection of fluorescent surfaces on the inner surface of fluorescent screens. When there is an electron beam, the uniformity of the brightness of the daylight image displayed on the fluorescent surface can be considered, and the curved surface of the fluorescent screen can be improved. Generally speaking, the glass peripheral of a cathode ray tube is composed of a panel portion provided with a curved fluorescent screen, a thin diameter tube neck, and a slightly funnel-shaped cone connecting the panel portion and the tube neck. Ministry of Construction. A phosphor screen is formed on the inner surface of the phosphor screen, an electron gun is installed on the inner surface of the neck of the tube, and a deflection yoke is installed on the outer periphery of the cone portion, thereby forming a cathode ray tube. At this time, because the inside of the glass peripheral of the cathode ray tube is generally in a vacuum state, and atmospheric pressure is often applied from the outside, it must be provided with a certain mechanical strength of more than 値. Therefore, the material of each part of the glass peripheral The thickness is set at a level that is strong enough to withstand the machinery. And in the conventional cathode ray tube, the structure of the fluorescent screen of the glass peripheral device is generally formed, and the material thickness of the peripheral part is thicker than that of the central part of the fluorescent screen. Fig. 11 is a cross-sectional view showing an example of the constitution of a glass peripheral portion of a conventional cathode ray tube. In Figure 11, 31 is a fluorescent screen, 31 (1) is the inside of the screen, 31 (2) is the outside of the screen, tpc is the thickness of the central part of the screen 31, and tpa is the screen The thickness of the peripheral part of 3 1 is thick. Rp i is the radius of curvature of the fluorescent screen 3 1 (1) centered on the deflection center point 0 of the electron beam. R p 0 is the deflection center point of the electron beam. 〇 is the radius of curvature of 3 1 (2) outside the center of the fluorescent screen. --------- dll · ----- IT ------ ά (Please read the precautions on the back before filling this page) This paper size applies Chinese National Standard (CNS) A4 specifications ( 210X297 mm) -4-554374 A7 B7 V. Description of the invention (2) (Please read the precautions on the back before filling this page) As shown in Figure 1 1, the fluorescent screen 3 1 is for the above mechanical strength of Wei Si See, make the material thickness tpa in the peripheral part thicker than the material thickness tpc in the central part. As a result, the curvature radius Rpi of the inner surface 31 (1) of the fluorescent screen is larger than the curvature radius 3 1 (2) of the outer surface of the fluorescent screen. The small structure, that is, tpcCtpa and Rpi < Rpo 〇 The conventional cathode ray tube described above is because the thickness of the central part of the fluorescent screen 31 is thinner. The thickness of the peripheral part is thick tpa, so when displaying an image on the fluorescent surface formed on the inner surface of the fluorescent screen 31, the light emitted from the fluorescent surface to the outside through the fluorescent screen 31 is thick. The thinner part of the thin screen of the TPC 3 31 has less attenuation, while the thicker part of the thicker TPA of the fluorescent screen 3 1 will have more attenuation. In other words, the central part of the fluorescent screen 31 1 transmits light. The rate is Tp c, and the light transmittance of the peripheral part is Tp a, that is, Tp c > Tp a. The brightness of the displayed image is lower than that of the central portion of the fluorescent screen 31, which constitutes the problem that the peripheral portion cannot sufficiently ensure the brightness of the displayed image. In addition, the brightness of the phosphor becomes smaller at the periphery of the screen, that is, at the center of the screen. Bureau of Intellectual Property, Ministry of Economic Affairs (printed by the Industrial and Consumer Cooperative) When the brightness of the displayed image on the peripheral part of the fluorescent screen 31 is lower than the brightness of the day image displayed on the central part, The brightness of part of the displayed image is corrected to be equivalent to that of the central part, so that the intensity of the electron beam projected on the peripheral part of the fluorescent surface is enhanced to be greater than that of the central part of the fluorescent surface. The intensity of the electron beam can be large, but this method of correcting the intensity of the electron beam is not easy to obtain. In addition, in the cathode ray tube, in order to minimize the leakage magnetic field from the bias to the yoke, it is reduced. The method of supplying the bias voltage to the bias yoke, -5- This paper size applies to the Chinese National Standard (CNS) A4 specification (2) × 29: 7 mm) Printed by the Employees ’Cooperative of the Intellectual Property Bureau of the Ministry of Economy 554374 A7 B7 V. Description of the Invention (3) However, due to the recent increase in the number of cathode ray tubes with large deflection angles, the deflection voltage supplied to the deflection yoke of the cathode ray tube will increase as the deflection angle becomes larger. It is very difficult to reduce the bias voltage supplied to the deflection yoke in the polar tube, so that it has a problem that the leakage magnetic field of the self-deflection yoke cannot be reduced. The present invention was developed in order to solve the above-mentioned problems, and provides a method with a simple structure, that is, The brightness of the displayed image on the peripheral part of the fluorescent screen can be compared with that of the cathode-ray tube which displays the brightness of the image on the central part. Furthermore, another object of the present invention is to provide a situation where the deflection angle is large. The cathode ray tube that can reduce the bias voltage supplied to the yoke, which may reduce the leakage magnetic field from the yoke. (Invention) In order to achieve the above purpose, according to the cathode ray tube of the present invention, The shape of the curved surface of the light screen is defined as the same or more when the curvature radius of the inner surface is compared with the curvature radius of the outer surface, and the transmittance of the black matrix is specified to a certain range. The shape is that the radius of curvature of the inner surface is greater than the radius of curvature of the outer surface, so the thickness of the material on the central portion of the screen and the thickness of the periphery portion The gap becomes smaller, and the thickness of the material in the central portion becomes thicker than that of the surrounding portion, so the display brightness of the peripheral portion of the fluorescent screen can be increased to the level of display brightness of the center portion. The hole matrix transmittance of the black matrix does not need to be increased excessively around the screen, so it will not cause a significant degradation of the resolution around the screen, and a cathode ray tube with good color purity can be obtained. ---------衣 — ^ ----- 1T ------ ά (Please read the notes on the back before filling in this page) This paper size applies the Chinese National Standard (CNS) Α4 specification (210 × 297 mm) -6- Economy Printed by the Consumer Cooperative of the Ministry of Intellectual Property Bureau 554374 A7 B7 V. Description of the Invention (4) According to the above method, the curved surface shape of the fluorescent screen is such that the curvature radius of the inner surface will be larger than that of the conventional cathode ray tube panel The radius of curvature of the inner surface of the fluorescent screen is large, so the distance from the deflection center point of the electron beam to the peripheral portion of the fluorescent surface formed on the inner surface of the fluorescent screen is longer than the same distance of the conventional cathode ray tube. , So the amount of electrons biased towards the yoke The smaller the beam deflection angle can reduce the deflection voltage supplied to the deflection yoke to reduce the leakage magnetic field from the deflection yoke. (Explanation of a suitable embodiment) In the embodiment of the present invention, the cathode ray tube is formed by a panel portion having a fluorescent surface formed on the inner surface of a curved fluorescent screen and a fluorescent surface facing the internal device. The tube neck portion of the electron gun which emits an electron beam, and the panel portion and the tube neck portion are connected, and the device is biased toward the cone portion of the yoke on its outer periphery. The curved shape of the screen is formed such that the curvature radius of the inner surface is equal to or greater than the curvature radius of the outer surface. According to the embodiment of the present invention, the shape of the curved surface of the fluorescent screen of the cathode ray tube is set so that the curvature radius of the inner surface is approximately equal to or larger than the curvature radius of the outer surface, so the periphery of the fluorescent screen The thickness of the part is equal to or thinner when compared with the thickness of the center part. This result increases the brightness of the displayed image in the peripheral part of the fluorescent screen, and can make the displayed image in the peripheral part. The brightness is close to the brightness of the displayed image in the center. In addition, according to the embodiment of the present invention, the curvature radius of the inner surface becomes larger than that of the inner surface of the fluorescent screen of the panel portion of the conventional cathode ray tube, so that the self-electron beam reaches ------------ I-= ----- 、 玎 ------ ^ (Please read the precautions on the back before filling in this (Page) This paper size applies Chinese National Standard (CNS) A4 (210X297mm) -7- 554374 A7 B7 V. Description of the invention (5) (Please read the precautions on the back before filling this page) The distance is slightly longer than that of the conventional cathode wire tube, so for this variable length, the deflection angle of the electron beam deflected toward the yoke can be small. This result can reduce the deflection voltage supplied to the deflected yoke, which can reduce The amount of leakage magnetic field from the yoke. Specifically, they are cathode ray tubes each having the following configuration. (1) When the inner and outer sides of the fluorescent screen are connected to the center of the screen and the periphery of the screen in the diagonal direction, the equivalent 値 (equivalent) curvature radii are respectively RD I and RD0. The thickness of the panel part in the center of the screen is tc , The relationship between RD0-tc < RDI is formed. The BM (black matrix) hole transmittance around the diagonal of the screen is 110% or less in the center. (2) The equivalent curvature radii of the center of the screen and the direction of the long axis of the screen between the inner and outer sides of the screen are RH I and RHO, respectively. When the thickness of the panel part in the center of the screen is tc, there is RHO-t c & lt The relationship between RHI, the transmission rate of the BM hole around the long axis of the screen is less than 11% of the center, printed by the Consumer Cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs (3) on the inside and outside of the fluorescent screen, connected The equivalent curvature radii of the center of the screen and the periphery of the diagonal direction of the screen are RD I and RDO, respectively. When the thickness of the panel part in the center of the screen is tc, there is a relationship between RDO-tc and RDI. The rate is above 70% and below 110% of the center. (4) The outer surface of the fluorescent screen is flat. The thickness of the frit around the panel in the diagonal direction of the daytime surface is thinner than that in the center of the screen. Less than 110% of the central, -8- This paper size applies to the Chinese National Standard (CNS) A4 specifications (210X297 mm) 554374 A7 B7 V. Description of the invention (6) (Please read the precautions on the back before filling this page) ( 5) The inner surface of the fluorescent screen is flat. The thickness of the frit around the panel in the diagonal direction of the screen is thinner than that in the center of the screen. The transmittance of the BM hole is around the diagonal of the screen and in the center of the screen. 11% or less, (6) A shadow-mask is installed on the fluorescent surface facing the inside of the panel, and the fluorescent surface is a plurality of phosphors surrounded by a black matrix (B · M). The outer surface of the fluorescent screen portion is an aspheric surface formed by pixels. The thickness of the glass frit of the fluorescent screen portion is thinner when compared with the central portion of the fluorescent surface. (7) The inner surface of the fluorescent screen is aspherical. When the thickness of the frit of the fluorescent screen is compared with that of the central portion of the fluorescent screen, the thickness of the peripheral material in the diagonal direction is thinner. (8) The fluorescent surface is formed by a three-color phosphor three-dot group in a complex array surrounded by a black matrix corresponding to three colors of three electron beams. The three-dot fluorescent group is The central portion of the fluorescent surface is arranged at intervals of 0. 26 mm or less. The fluorescent screen portion, that is, the thickness of the frit, is the material of the peripheral portion in the diagonal direction when compared with the central portion of the fluorescent surface. Thicker and thinner. Printed by the 8th Consumer Cooperative of the Intellectual Property Office of the Ministry of Economic Affairs. Combining at least one of the above (1) to (8) and at least one of the following constitutions can achieve more excellent effects. (9) The above-mentioned BM hole transmittance in the diagonal direction is smaller than that in the center of the day surface. (10) The transmittance of the above BM hole around the long axis direction is smaller than that in the center of the screen. (1 1) On the inside and outside of the fluorescent screen, the equivalent curvature radii connecting the center of the screen and the periphery of the short-axis direction of the screen are RVI, RV 0, -9-This paper standard is applicable to Chinese national standards (CNS ) A4 specification (210X297 mm) 554374 A7 B7 V. Description of the invention (7) When the material thickness of the panel in the center of the screen is tc, there is a relationship of RV0-tc-RV I. (Please read the precautions on the back before filling in this page) (1 2) The light transmittance of the material of the panel part is slightly general hue. (1 3) The light transmittance of the material of the panel portion is slightly darker. (1 4) The diagonal diameter of the picture is about 4 6 cm or more. (1 5) The pitch of the dots in the center of the screen is about 0.26 mm or less. (16) The deflection angle is about 100 ° or more. (1 7) The transmittance of the shielding screen around the diagonal direction of the screen is less than 110% of the transmittance of the shielding screen in the center. (1 8) The transmittance of the shielding screen around the diagonal direction of the screen is smaller than that of the shielding screen in the center. (19) The pitch of dots in the diagonal direction around the screen is less than 110% of the pitch of dots in the center of the day. (2 0) The pitch of dots in the diagonal direction around the screen is less than 105% of the pitch of dots in the center of the day. Printed by the Intellectual Property of the Ministry of Economic Affairs / Employee Consumer Cooperative (2 1) The BM transmittance around the diagonal direction of the screen is 90% to 110% of the central one. (2 2) The material thickness of the panel around the minor axis of the screen is equal to or greater than the center of the screen. Hereinafter, embodiments of the present invention will be described with reference to the drawings. Fig. 1 is a sectional view showing the configuration of essential parts of an embodiment of a cathode ray tube of the present invention. An example is shown in which the cathode ray tube is a color cathode ray tube. In Figure 1, the 1-series panel, 1 A-series fluorescent screen, and 1 B-series panel periphery-10- This paper size applies to China National Standard (CNS) A4 specifications (210X297 mm) 554374 A7 B7 V. Description of the invention (8 ) (Please read the notes on the back before filling out this page), 2 necks, 3 cones, 4 fluorescent films, 5 shielding screens, 6 internal shields, 7 deflecting yoke, 8 Color purity adjustment magnets, 9 series central beam static focus adjustment magnets, 10 series side beam static focus adjustment magnets, 11 series electron guns, and 12 series electron beams. The glass peripheral device (tube) constituting the color cathode ray tube is composed of a panel portion 1 of a large tube item disposed on the front side, a tube neck portion 2 containing a group leader of an electron gun 11 1 therein, and a connection panel portion 1 and The neck portion 2 is formed by a slightly funnel-shaped cone portion 3. The panel portion includes a front fluorescent screen 1 A and a peripheral portion 1 B connected to the cone portion. A fluorescent film 4 is formed on the inner surface of the fluorescent screen 1 A, and a shielding screen is installed opposite to the fluorescent film 4 5 ° Intellectual property of the Ministry of Economy 咼 Employee Consumer Cooperative Co. printed on the panel section 1 and cone An inner magnetic shield 6 is provided on the inner side of the joint portion of the body portion 3, and a bias yoke 7 is arranged outside the joint portion of the cone portion 1 and the cone portion 3, that is, in use. After the three electron beams 1 2 (only one is shown in the figure) radiated by the electron gun 11 are deflected toward the predetermined direction by the yoke 7, they pass through the shielding screen 5 and hit the fluorescent film 4. On the outside of the tube neck portion 2, a color purity adjusting magnet 8, a central beam static focus adjustment magnet 9, and a side beam static focus adjustment magnet 10 are arranged in parallel. The image display operation of the color cathode ray tube constructed as described above is the same as the image display operation of the conventional color cathode ray tube, so the description of the image display operation of the color cathode ray tube is omitted. Next, Fig. 2 is a sectional view showing the constitution of the fluorescent screen 1A portion of the panel portion 1 of the color cathode ray tube of the embodiment shown in Fig. 1. In Figure 2, IA (1) is the inner surface of the fluorescent screen. The paper size of the 1A (2) fluorescent screen is applicable to the Chinese National Standard (CNS) A4 specification (210X297 mm) _ "554374 A7 B7 V. Description of the invention (9 ) (Please read the precautions on the back before filling this page) Outside, tc is the material thickness of the central part of the fluorescent screen 1 A, ta is the material thickness of the peripheral part of the fluorescent screen 1A, and R i is fluorescent The curvature radius of the inner surface of the screen 1A (1), Ro is the curvature radius of 1A (2) on the outer surface of the fluorescent screen, and other components that are the same as those shown in Figure 1 are marked with the same reference numerals. In this example, The thickness tc and ta of the central and peripheral parts of the above-mentioned fluorescent screen 1 A represent the shortest distances between the inner surface IA (1) and the outer surface 1A (2) of the fluorescent screen. Also, the curvature of the fluorescent screen is usually The radius is significantly larger when the inner and outer sides are compared with the material thickness of the fluorescent screen. Therefore, for the material thickness ta of the peripheral part of the fluorescent screen 1 A, that is, a fluorescent screen parallel to the tube axis direction can be used. The distance between the inner surface 1A (1) and the outer surface 1A (2) is used instead. As shown in FIG. 2, printed by the R Industrial Consumer Cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs, the fluorescent screen 1 of this embodiment A is that the relationship between the curvature radius Ro of the fluorescent screen IA (1) and the external screen 1A (2) is RoSR i + tc, so that the thickness ta of the peripheral portion of the fluorescent screen and the thickness tc of the central portion Approximately equal or thinner. The so-called peripheral part of the fluorescent screen in this example corresponds to the phosphor dots or strips of the fluorescent film 4 formed on the inner surface of the fluorescent screen 1 A (1) as shown in FIG. 3. The field is even the peripheral part of the effective day surface 1 1 1 that displays the day image. The fluorescent screen 1 A of the panel part 1 of this embodiment is designed by the following procedure. First, the fluorescent light is specified in step S 1. The curvature radius Ro of 1 A (2) on the outside of the screen 1 A. Then in step S2, set the material thickness of the central part of the screen 1 A. The paper size applies the Chinese National Standard (CNS) A4 specification. (210X297): 12-" ~ ^ --- 554374 A7 B7 V. Description of the invention (10) In step S 3, set the material thickness ta of the peripheral portion of the fluorescent screen 1 A to the previous step S 2 The thickness tc of the center part is set equal or thinner. (Please read the precautions on the back before filling this page) Then set in step S 4 to meet the requirements of the previous steps S 2 and S 3 The curvature radius R i of the inner surface of the fluorescent screen 1 A (1) of the material thickness tc in the central part and the material thickness ta in the peripheral part. In the subsequent step S 5, the steps s 4 and steps having the preceding steps are implemented. The required intensity of the curvature radius R i of the inner surface 1A (1) of the fluorescent screen and the curvature radius R ○ of the outer surface 1 A (2) of the fluorescent screen are set in S 1 respectively. Calculation. Then, in step S6, when it is judged that the intensity calculation result implemented in the previous step S5 is more than necessary, the curvature radius Ri with the inner surface of the fluorescent screen IA (1) and the outer surface of the fluorescent screen 1A ( 2) The design of the fluorescent screen 1 A of the panel portion 1 with the curvature radius R 〇. On the other hand, if the result of the calculation of the intensity is required, return to the previous step S 3 and perform the processing after step S 3 again. The color cathode ray tube with the fluorescent screen 1A of the panel portion 1 obtained as described above is printed by the Intellectual Property Bureau of the Ministry of Economic Affairs and the Industrial Cooperative Cooperative. The thickness of the peripheral portion of the fluorescent screen 1 A is formed at the center portion. The material thickness tc is the same or slightly thin, so the light transmittance around the screen can be made approximately the same as or greater than the transmittance in the center of the day surface, so the brightness of the entire screen can be more uniform. The method of compensating the difference in brightness between the center and the surroundings can be proposed by increasing the hole transmittance of the black matrix (BM) to improve the surroundings than the center.
本例中所謂B Μ孔透過率係指，如圖4所示，沒有石墨 4 Β Μ之部份之比例，換言之光線之能通過之比例。又P D 本紙張尺度適用中國國家標準（CNS ) Α4規格（210X297公釐） -13 - 554374 A7 B7 五、發明説明（11) (請先閲讀背面之注意事項再填寫本頁) 係 ''點節距"，係指同色之螢光體之間隔。圖5係螢光面爲 條狀之情形。惟如使用傳統者之玻璃厚度者之於中央處較厚 之面板時，即使周邊之ΒΜ孔透過率提高至中央處之1 0% 以上，否則很難將中央及周邊靠近於均一之暉度。做爲於畫 面周邊，不犠牲著地裕度地提高ΒΜ孔透過率之手段而有， 使畫面周邊之點節距大於畫面中央之方法，惟在周邊太提高 點節距時，即會致使畫面周邊之解像度之劣化。又在周邊提 高孔透過率時，即由於通過遮蔽屏之電子射束並沒有充分地 大於Β Μ之孔，所以發生電子射束之不蓋滿孔部份之所謂射 束之欠缺。爲了防止它而提高遮蔽屏之透過率時，即會產生 遮蔽屏強度降低之問題。本例中遮蔽屏之透過率係指如圖6 所示，遮蔽屏孔5 1之面積之比例。 本發明乃將面板料厚設爲該周邊者與中央處相比同等或 稍薄，同時以與面板料厚之關係來規定ΒΜ孔透過率，由而 一面保持著地裕度，一方面縮小中央與周邊之暉度者。 按令面板料厚及ΒΜ孔透過率，於中央處及周邊處同等 之下，仍然由下述（1) (2)之理由而周邊之暉度會低於 經濟部智慧財產局8工消費合作社印製 中央處。（1)螢光體點之重量乃畫面周邊會低於畫面中央 處，（2)反射該自螢光體之光之金屬襯墊之反射率乃於畫 面周邊而會降低。所以雖然使面料厚，使之於周邊稍薄之情 形下，有時ΒΜ透過率乃依然在周邊還是有提高之必要。惟 在此時對於畫面中央之畫面周邊之ΒΜ孔透過率仍可採用 1 1 0%以下。又兼合了面板料厚及暉度差之問題是，可採 用1 0 5 %以下。 -14- 本紙張尺度適用中國國家標準（CNS )八4規格（210Χ297公釐） 經濟部智慧財產局Μ工消費合作社印製 554374 Α7 Β7 五、發明説明（12) 本發明之最合宜之實施例乃，令BM孔透過率設定爲其 周邊者低於畫面中央之値。又令BM孔透過率設定爲於畫面 周邊而爲畫面中央比之7 0%以上即更可提高與畫面中央之 暉度比。如9 0 %以上即更佳。由而可以解消中央與周邊之 暉度差，同時可採必要之著地裕度。又畫面周邊之BM孔透 過率係畫面中央比1 1 0 %以下時，該周邊之點節距亦可使 之爲中央比1 1 0 %以下。因此周邊之解像度之劣化不太顯 著。同樣畫面周邊之BM孔透過率係畫面中央比1 〇 5%以 下時，可以使周邊之點節距爲中央比之1 0 5 %以下，所以 在周邊之解像度之劣化即幾乎看不出來。又由於不須要將遮 蔽屏之透過率於周邊而過度地提高，所以於周邊而使遮蔽屏 透過孔變小，所以可以確保遮蔽屏之強度。 畫面周邊之BM孔透過率爲中央比110%以下時即遮 蔽屏之透過率也可抑制到中央比1 1 0 %以下。考慮遮蔽屏 強度之裕度時，畫面周邊之遮蔽屏透過率乃較畫面中央者低 爲宜。 有效畫面周邊係如圖3所示，以對角方向周邊1 1 2， 長軸方向周邊1 1 3，短軸方向周邊1 1 4來代表，一般而 言，畫面中央之暉度差之最成爲問題者係對角方向周邊 1 1 2，接著係長軸方向1 1 3，下之即短軸方向1 1 4。 實際上隨應於製品之暉度分佈之要求而設定上述各部份之面 板料厚，B Μ孔透過率，遮蔽屏透過率即可以。 使用於電腦終端機之彩色顯示管（C D Τ )等’即爲了 提高對比起見，面板玻璃係採用所謂一般色調者（1 〇 . 6 ---------:扣衣--^-----1Τ------,'0 (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 ) Α4規格（210Χ297公釐） -15- 554374 A7 B7 五、發明説明（13) (請先閲讀背面之注意事項再填寫本頁) mm之板厚，透過率56·8%，以波長546nm之光之 測定而有E I A J標準透過率）時，爲了提高對比起見可使 用深暗色調者（10 · 6mm之板厚，透過率46%，以波 長5 4 6 nm之光之測定而E I A J標準透過率爲多。本發 明係在於使用此種透過率低之玻璃時特別有效。 九該點節距之在中央爲0.26mm以下之高精細管時 ，於畫面周邊之電子射束之對於螢光體之著地裕地小，很難 提高周邊之BM孔透過率。所以本發明乃在此種C D T特別 有效。 又畫面之中央與周邊之暉度差係在大形管上特別顯著的 可看出，本發明係在1 9 "以上之大形C D T特別有效。 下面顯示將本發明適用於19〃 CDT(有效畫面對角 徑4 6 cm)之例子。此時之面板之胚料乃一般色調。 中央 12 . 5mm 4 2.4% 17.6% 0 . 2 6mm 面板料厚 B Μ孔透過率 遮蔽屏透過率 點節距 經濟部智慧財產局8工消費合作社印製 對角方向周邊 11.3mm 3 9.8% 17.1% 〇.27mm 以上乃以螢光屏內面或外面爲球面爲前提來說明，惟當 然亦可適用於螢光屏內面或外面爲非球面時之情形。 非球面時乃如圖7所示，將等價曲率半徑R E，以與自 螢光屏中央之陷落量Z之關係而規定爲下式。 -16- 本纸張尺度適用中國國家標準（CNS ) A4規格（210X 297公釐） 554374 A7 ______B7_ 五、發明説明（14)In this example, the so-called B M pore transmittance refers to the ratio of the portion without graphite 4 BM as shown in FIG. 4, in other words, the ratio of light that can pass through. And PD This paper size applies Chinese National Standard (CNS) A4 specification (210X297 mm) -13-554374 A7 B7 V. Description of invention (11) (Please read the precautions on the back before filling this page) Distance " refers to the distance between phosphors of the same color. Figure 5 shows the case where the fluorescent surface is stripe-shaped. However, when using a traditional glass with a thicker panel at the center, even if the peripheral BM hole transmittance is increased to more than 10% at the center, it is difficult to bring the center and the periphery closer to uniform brightness. As a method around the screen, there is no need to increase the BM hole transmittance marginally, so that the point pitch around the screen is greater than the center of the screen, but if the point pitch is too high around the periphery, the screen will be caused. Degradation of the surrounding resolution. When the pore transmittance is increased in the periphery, that is, because the electron beam passing through the shielding screen is not sufficiently larger than the BM hole, a defect of the so-called beam that does not cover the hole portion of the electron beam occurs. When the transmittance of the shielding screen is increased in order to prevent it, a problem occurs in that the strength of the shielding screen is reduced. The transmittance of the shielding screen in this example refers to the ratio of the area of the shielding screen hole 51 as shown in FIG. 6. In the present invention, the thickness of the panel material is set to be equal to or slightly thinner than that of the center, and at the same time, the BM hole transmittance is regulated in accordance with the thickness of the panel material, thereby maintaining the floor margin while reducing the center. With those around the brightness. According to the order, the panel thickness and the BM hole transmittance are equal at the center and the surrounding area. The brightness of the surrounding area will still be lower than the reason of (1) (2) below. Printed at the central office. (1) The weight of the phosphor point is lower than the center of the screen. (2) The reflectivity of the metal pad that reflects the light from the phosphor is reduced around the screen. Therefore, although the fabric is made thicker so that it is slightly thinner at the periphery, sometimes it is necessary to increase the BM transmittance at the periphery. However, at this time, the transmittance of the BM hole around the picture in the center of the picture can still be less than 110%. The problem of panel thickness and brightness difference is that it can be used below 105%. -14- This paper size is in accordance with Chinese National Standard (CNS) 8-4 specification (210 × 297 mm) Printed by the Intellectual Property Bureau of the Ministry of Economic Affairs M Industrial Consumer Cooperative 554374 Α7 Β7 V. Description of the invention (12) The most suitable embodiment of the present invention That is, the transmittance of the BM hole is set so that its surroundings are lower than the center of the screen. In addition, setting the BM hole transmittance at the periphery of the screen to 70% or more of the center of the screen can increase the brightness ratio to the center of the screen. For example, more than 90% is better. As a result, the difference in brightness between the center and the surrounding area can be eliminated, and the necessary land margin can be adopted. When the BM hole transmission rate around the screen is less than 110% of the center of the screen, the pitch of the points around the screen can also be set to less than 110% of the center. Therefore, the degradation of the surrounding resolution is not so significant. Similarly, when the BM hole transmittance at the periphery of the screen is less than 105% of the center of the screen, the pitch of the points around the center can be less than 105% of the center ratio, so the degradation of the resolution at the periphery is almost invisible. In addition, since it is not necessary to excessively increase the transmittance of the shielding screen at the periphery, the penetration hole of the shielding screen is reduced at the periphery, so that the strength of the shielding screen can be ensured. When the transmittance of the BM holes around the screen is 110% or less of the center ratio, the transmittance of the shielding screen can also be suppressed to 110% or less of the center ratio. When considering the margin of the intensity of the mask, it is better that the transmittance of the mask in the periphery of the screen is lower than that in the center of the screen. The effective picture periphery is shown in Figure 3. It is represented by the diagonal periphery 1 1 2, the long axis periphery 1 1 3, and the short axis periphery 1 1 4. Generally speaking, the brightness difference at the center of the screen becomes the most. The person in question is the diagonal 1 1 2, followed by the long axis 1 1 3, and the short axis 1 1 4. In fact, according to the requirements of the brightness distribution of the product, the surface sheet thickness of each of the above parts, the BM hole transmittance, and the shielding screen transmittance can be set. Color display tubes (CDT), etc. used in computer terminals, that is, in order to improve the contrast, the panel glass adopts the so-called general color tone (10.6 ---------: button clothing-^ ----- 1Τ ------, '0 (Please read the precautions on the back before filling this page) This paper size applies to China National Standard (CNS) A4 specification (210 × 297 mm) -15- 554374 A7 B7 V. Description of the invention (13) (Please read the precautions on the back before filling out this page) The thickness of the plate is mm, the transmittance is 56 · 8%, and the EIAJ standard transmittance is measured by the light with a wavelength of 546nm. In order to improve the contrast, you can use dark and dark tones (plate thickness of 10.6mm, 46% transmittance, measured by light with a wavelength of 5 4 6 nm, and the EIAJ standard transmittance is more. The present invention is to use this transmittance It is especially effective when the glass is low. At the point where the pitch is 0.26 mm or less in the center, the electron beam around the screen has a small land area for the phosphor, which makes it difficult to improve the surrounding BM. Porous transmittance. Therefore, the present invention is particularly effective in such a CDT. Also, the difference in brightness between the center of the picture and the surroundings is large. It is particularly noticeable on the tube that the present invention is particularly effective for the large CDTs of 19 " and above. The following shows an example of applying the present invention to a 19〃 CDT (diagonal diameter of effective picture 4 cm). At this time The material of the panel is a general color. The center is 12.5mm 4 2.4% 17.6% 0. 2 6mm Panel material thickness B MEMS hole transmittance masking screen transmittance point pitch Pitch printed diagonally by the 8th Industrial Cooperative Cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs Directional perimeter 11.3mm 3 9.8% 17.1% 〇.27mm or more is described on the premise that the inside or outside of the fluorescent screen is spherical, but of course it can also be applied when the inside or outside of the fluorescent screen is aspherical. For spherical surface, as shown in Figure 7, the equivalent radius of curvature RE is defined by the following formula in relation to the amount of depression Z from the center of the fluorescent screen. -16- This paper applies the Chinese National Standard (CNS) A4 Specifications (210X 297 mm) 554374 A7 ______B7_ V. Description of the invention (14)
RE = (Z2 + d2)/2Z (請先閲讀背面之注意事項再填寫本頁) 非球面面板之利點乃具有對於必要之暉度設定値而獨立 地可設定，對角軸上，長軸上，短軸上之面板料厚差之利點 〇 在於與畫面中央之暉度比，短軸方向周邊1 1 4上很少 成爲問題。另一方面，遮蔽屏強度即於短軸方向周邊而裕度 最小。遮蔽屏強度乃藉由賦以曲率而可以增大，遮蔽屏曲面 乃強烈的受面板內面曲率，所以從此點而言，面板內面之曲 率半徑乃較小爲宜。即於畫面對角方向周邊，使其面板料厚 小於中央處，於畫面短軸方向周邊即令其面板料厚大於中央 處，由而一面維持必要之遮蔽屏之強度，而使中央與周邊之 暉度差。此實施例顯示於圖8。 經濟部智慈財產笱8工消費合作社印製 在面板料厚在中央與周邊而大致同等之情形之下，仍然 與習用例相比較時，可以使畫面中央與周邊之暉度差變小。 此時晝面周邊之BM孔透過率爲畫面中央比7 0%以上’更 好以9 0%以上爲宜。又BM孔透過率最好是周邊大於中央 爲宜。在此情形下，仍然與以往之在對角方向周邊而面板料 厚會變大之情形相比時，該暉度比得於改善，在對角方向周 邊之孔透過率在中央之110%以下之情形下仍然可以使之 成爲實用的暉度差。 如畫面周邊之孔透過率爲畫面中央之11〇%以下時， 即在晝面周邊而可以將點節距抑制於中央比1 1 0 %以下’ -17- 本紙張尺度適用中國國家標準（CNS ) A4規格（210X297公釐） 經濟部智慧財產^員工消費合作社印製 554374 A7 B7 五、發明説明（15) 即畫面周邊之解像度之劣化不太會看的出來。同樣的畫面周 邊之孔透過率爲畫面中央之1 0 5%以下即畫面周邊之點節 距可抑制於中央比1 0 5 %以下，而在畫面周邊之解像度之 劣化即幾乎不容易看出來。 面板外面爲平坦狀時，本發明乃其面板內面即在對角方 向即如圖9所示呈顯逆R。此時例如對角方向即使之爲逆R 。而短軸方向即做爲正R，而一面維持遮蔽屏之強度，而可 縮小中央與對角方向之周邊之暉度比。 面板內面係平坦狀時，即在面板外面使之具有適當之曲 率而可縮小畫面中央與對角方向周邊之暉度比。 圖1 0乃表示於圖1所圖示之實施例之彩色陰極射線管 之螢光屏內面1 A ( 1 )之構成與電子射束偏向角之關係之 說明圖。乃將習知之陰極射線管之螢光屏內面之構成與電子 射束偏向角之關係一倂表示者。又圖1 0所圖示之例時，本 實施例之彩色陰極射線管之螢光屏外面之曲率半徑R 〇與習 知之陰極射線管之螢光屏外面之曲率半徑R P 〇係相等者。 圖1 0中，A係，在本實施例之彩色陰極射線管之螢光 屏內面，B係習知之陰極射線管之螢光屏內面，C係電子射 束中心軸。 如圖1 0所示，在本實施例之彩色陰極射線管中，自電 子鎗11所放射之電子射束12乃由偏向軛7而由電子射束 1 2之偏向中心0而屈曲，到達於螢光屏內面A。此時電子 射束1 2乃會到達於自電子射束中心軸C而離開距離y之螢 光屏內面A起見須要以下式所代表之電子射束偏向角0。 本紙張尺度適用中國國家標準（CNS ) A4規格（210X297公釐） 裝 訂 線 (請先閲讀背面之注意事項再填寫本頁) 554374 A7 B7 五、發明説明（16) Θ = t an-1 { y / z ) ...... (1) 惟，Z乃將電子射束1 2之軌跡正射影於電子射束中心 軸之長度’螢光屏內之曲率半徑R i ’自電子射束1 2 之偏向中心點〇到螢光屏內面A之中心爲止之距離L時得以 下式Z=L—Rcos {sin_1(y/Ri)}來表示 〇 另一方面，在既知之陰極射線管中，自電子鎗所放射之 電子射束即由偏向軛而自電子射束之偏向中心點0而屈曲， 到達於螢光屏內面B ’此時爲了電子射束之到達於自電子射 束中心軸C離開距離y之螢光屏內面B起見，須要以下式所 代表之電子射束偏向角Θ'。 0 〜t a η _ 1 ( y / Z > )……（2 ) 此時Z >係將電子射束之軌跡正射影於電子射束中心軸 C時之長度，將螢光屏內面A之曲率半徑爲Rp i時可以用 下式來表示。 Z^=L — Rcos {sin 一 My/Rpi) } 此時，由於本實施例之彩色陰極射線管之螢光屏外面之 曲率半徑R 〇與習知之陰極射線管之螢光屏外面之曲率半徑 R p 〇相等，所以本實施例之彩色陰極射線管之螢光屏內面 之曲率半徑R i與習知之陰極射線管之螢光屏內面之曲率半 徑R P i之間將成立R i > R P i之關係，結果z > Z /。 又將Z>Z /之關係適用於（1 )式及（2)式時’在 ^-- (請先閱讀背面之注意事項再填寫本頁) 、τ 經濟部智慧財產員工消費合作社印製 本紙張尺度適用中國國家標準（CNS ) A4規格（210X297公釐） —19 - 554374 A7 B7 五、發明説明（17) 二個電子射束之偏向角0，Θ >之間成立。 (請先閲讀背面之注意事項再填寫本頁) 由於供給於偏向軛之偏向功率係與偏向角之三乘成比例 。所以偏向角之實質上變小時可以減低偏向功率。所以可以 減低自偏向軛之不要之輻射。另一方面如偏向功率與習知者 相等就可以時，即Z - Z /之份量地可以減少陰極射線管之 全長。 本發明乃在偏向角之變大，偏向功率之問題更嚴重之， 例如公稱偏向角1 0 0 °以上之陰極射線管上特別有效果。 依本發明時，一面可保持畫面周邊之著地裕度，一面可 以減低畫面中央與畫面周邊之暉度差。 又依本發明時可以不減低遮蔽屏強度之下，可減低畫面 中央與畫面周邊之暉度差。 又依本發明時，在同一畫面尺寸比而可減低偏向電力， 或縮小陰極射線管之全長也。 圖式之簡單說明 經濟部智慈財產苟員工消費合作社印製 第1圖係顯示本發明之陰極射線管之一實施例之要部構 成斷面圖。 第2圖係顯示本發明之螢光屏之實施例之斷面圖。 第3圖係爲了說明本發明之面板之平面部。 第4圖係點方式之黑矩陣之說明圖。 第5圖係條方式之黑矩陣之說明圖。 第6圖係點方式之遮蔽屏之說明圖。 第7圖係表示螢光屏部爲非球面時之等値曲率半徑之圖 -20- 本紙張尺度適用中國國家標準（CNS ) A4規格（210X29*7公釐） 554374 A7 B7 五、發明説明（18) 第8圖係本發明之其他實施例之面板之斷面圖。 (請先閲讀背面之注意事項再填寫本頁) 第9圖係本發明之其他實施例之面板之斷面圖。 第i 〇圖係本發明之實質的減低偏向角度之說明圖 第1 1圖係表示先前技術之面板之斷面圖。 經濟部智慈財產局員工消費合作社印製 主 要 元件對照表 1 面板部 1 A 螢光屏 1 B 面板周緣 部 2 管頸部 3 錐體部 4 螢光膜 5 遮蔽屏 6 內部磁性 遮 蔽 7 偏向軛 8 色純度調 整 磁 鐡 9 中心射束 靜 態 聚 焦 調 整 磁鐵 1 0 側射束靜 態 聚 焦 調 整 磁 鐵 1 1 電子鎗 1 2 電子射束 1 1 1 有效畫面 之 周 邊 部 1 1 2 對角方向 周 邊 1 1 3 長軸方向 周 邊 本紙張尺度適用中國國家標準（CNS ) A4規格（210x297公釐） -21 - 554374 A7 B7 五、發明説明（19) 114 短軸方向周邊 R 〇 曲率半徑 R i 曲率半徑 t c 面板部料厚 t a 螢光屏之周邊部份之料厚 51 遮蔽屏孔 (請先閱讀背面之注意事項再填寫本頁) 經濟部智慧財產笱員工消費合作社印製 -22- 本紙張尺度適用中國國家標準（CNS ) A4規格（210X297公釐）RE = (Z2 + d2) / 2Z (please read the precautions on the back before filling this page) The advantage of the aspherical panel is that it can be set independently for the necessary brightness setting. On the diagonal axis, the long axis In the above, the advantage of the difference in panel thickness on the short axis is that it is compared with the brightness of the center of the screen, and it is rarely a problem on the periphery 1 1 4 in the short axis direction. On the other hand, the shielding screen has the smallest margin around the minor axis. The intensity of the shielding screen can be increased by giving curvature. The curved surface of the shielding screen is strongly affected by the curvature of the inner surface of the panel. Therefore, from this point, the radius of curvature of the inner surface of the panel is small. That is, at the periphery of the diagonal direction of the screen, the thickness of the panel material is smaller than the center. At the periphery of the short axis of the screen, the thickness of the panel material is greater than the center. Degree difference. This embodiment is shown in FIG. 8. Printed by the Intellectual Property Department of the Ministry of Economic Affairs and the 8th Industrial Cooperative Cooperative. In the case where the thickness of the panel material is approximately the same in the center and the periphery, when compared with the use case, the difference in brightness between the center of the screen and the periphery can be reduced. At this time, the transmittance of the BM holes around the daytime surface is preferably more than 70%, and more preferably 90% or more. The BM hole transmittance is preferably greater than the center. In this case, the brightness ratio is still improved when compared with the conventional case where the panel material thickness is increased in the diagonal periphery, and the hole transmittance in the diagonal periphery is less than 110% of the center. This situation can still make it a practical brightness difference. If the hole transmittance at the periphery of the screen is less than 11% of the center of the screen, that is, at the periphery of the day, the dot pitch can be suppressed to less than 110% of the center ratio. -17- This paper applies the Chinese national standard (CNS ) A4 size (210X297 mm) Intellectual property of the Ministry of Economic Affairs ^ Printed by the Consumer Consumption Cooperative 554374 A7 B7 V. Description of the invention (15) That is, the deterioration of the resolution around the screen is not obvious. The hole transmittance around the same screen is less than 105% of the center of the screen, that is, the dot pitch around the screen can be suppressed to less than 105% of the center ratio, and the degradation of the resolution around the screen is hardly visible. When the outer surface of the panel is flat, the present invention shows that the inner surface of the panel is inverse R as shown in Fig. 9 in a diagonal direction. In this case, for example, the diagonal direction is reverse R. The short-axis direction is regarded as positive R, and the intensity of the shielding screen is maintained on one side, and the brightness ratio between the center and the periphery of the diagonal direction can be reduced. When the inner surface of the panel is flat, that is, the outer surface of the panel has an appropriate curvature to reduce the brightness ratio between the center of the screen and the periphery of the diagonal direction. FIG. 10 is an explanatory diagram showing the relationship between the configuration of the inner surface 1 A (1) of the fluorescent screen of the color cathode ray tube of the embodiment shown in FIG. 1 and the deflection angle of the electron beam. The relationship between the internal structure of the fluorescent screen of the conventional cathode ray tube and the deflection angle of the electron beam is shown. In the example shown in FIG. 10, the radius of curvature R o of the outside of the fluorescent screen of the color cathode ray tube of this embodiment is equal to the radius of curvature R P o of the outside of the fluorescent screen of the conventional cathode ray tube. In Fig. 10, A is the inner surface of the fluorescent screen of the color cathode ray tube of this embodiment, B is the inner surface of the conventional fluorescent screen of the cathode ray tube, and C is the central axis of the electron beam. As shown in FIG. 10, in the color cathode ray tube of this embodiment, the electron beam 12 emitted from the electron gun 11 is deflected by the deflection of the yoke 7 and the deflection of the electron beam 12 by the center 0, and reaches the fluorescent lamp. Light screen inner surface A. At this time, the electron beam 12 will reach the inner surface A of the fluorescent screen which is away from the center y of the electron beam by a distance y, so that the electron beam deflection angle 0 represented by the following formula is required. This paper size applies Chinese National Standard (CNS) A4 (210X297 mm) gutter (please read the notes on the back before filling this page) 554374 A7 B7 V. Description of the invention (16) Θ = t an-1 {y / z) ...... (1) However, Z is the length of the central axis of the electron beam 1 orbiting the trajectory of the electron beam 1 2 'the radius of curvature R i in the fluorescent screen' from the electron beam 1 The distance L from the deflection center point 2 to the center of the inner surface A of the fluorescent screen can be expressed by the following formula Z = L-Rcos {sin_1 (y / Ri)}. On the other hand, in the known cathode ray tube, The electron beam emitted from the electron gun is deflected by the deflection of the yoke and the deflection of the self-electron beam toward the center point 0, and reaches the inner surface B of the fluorescent screen at this time for the electron beam to reach the central axis of the self-electron beam For C to leave the inner surface B of the phosphor screen at a distance y, the electron beam deflection angle Θ 'represented by the following formula is required. 0 to ta η _ 1 (y / Z >) ... (2) At this time, Z > is the length when the trajectory of the electron beam is projected on the central axis C of the electron beam, and the inner surface A of the fluorescent screen is When the curvature radius is Rp i, it can be expressed by the following formula. Z ^ = L — Rcos {sin-My / Rpi)} At this time, due to the curvature radius R 〇 of the outside of the fluorescent screen of the color cathode ray tube of this embodiment and the curvature radius of the outside of the fluorescent screen of the conventional cathode ray tube R p 0 is equal, so the radius of curvature R i of the inner surface of the fluorescent screen of the color cathode ray tube of this embodiment and the radius of curvature RP i of the inner surface of the fluorescent screen of the conventional cathode ray tube will be established R i > The relationship of RP i, the result z > Z /. The relationship between Z > Z / is also applied to the formulas (1) and (2). In ^-(Please read the precautions on the back before filling out this page), τ Printed by the Intellectual Property Employee Consumer Cooperative of the Ministry of Economic Affairs The paper size applies the Chinese National Standard (CNS) A4 specification (210X297 mm) — 19-554374 A7 B7 V. Description of the invention (17) The deflection angle of two electron beams is established between 0, Θ >. (Please read the notes on the back before filling in this page.) Because the deflection power supplied to the deflection yoke is proportional to the three times the deflection angle. Therefore, when the deflection angle is substantially reduced, the deflection power can be reduced. Therefore, it is possible to reduce the unnecessary radiation from the bias to the yoke. On the other hand, if the deflection power is equal to the conventional one, it is enough, that is, the amount of Z-Z / can reduce the total length of the cathode ray tube. The present invention is particularly effective in the case where the deflection angle becomes larger, and the problem of deflection power is more serious. For example, the cathode ray tube with a nominal deflection angle of 100 ° or more is particularly effective. According to the present invention, while maintaining the ground margin around the screen, the difference in brightness between the center of the screen and the periphery of the screen can be reduced. According to the present invention, the brightness difference between the center of the picture and the periphery of the picture can be reduced without reducing the intensity of the shielding screen. According to the present invention, the bias power can be reduced or the total length of the cathode ray tube can be reduced at the same screen size ratio. Brief Description of the Drawings Printed by the Intellectual Property of the Ministry of Economic Affairs and the Consumer Cooperatives Figure 1 is a cross-sectional view showing the essential parts of an embodiment of the cathode ray tube of the present invention. Fig. 2 is a sectional view showing an embodiment of the fluorescent screen of the present invention. Fig. 3 is a plan view for explaining the flat portion of the panel of the present invention. Fig. 4 is an explanatory diagram of a black matrix in a dot mode. Fig. 5 is an explanatory diagram of a black matrix in a stripe manner. Fig. 6 is an explanatory diagram of a shielding screen in a dot mode. Figure 7 is a graph showing the equivalent curvature radius when the fluorescent screen is an aspheric surface. -20- This paper size applies the Chinese National Standard (CNS) A4 specification (210X29 * 7 mm) 554374 A7 B7 V. Description of the invention ( 18) Figure 8 is a sectional view of a panel according to another embodiment of the present invention. (Please read the precautions on the back before filling out this page.) Figure 9 is a cross-sectional view of a panel according to another embodiment of the present invention. Fig. I0 is an explanatory diagram of the substantial reduction of the deflection angle of the present invention. Fig. 11 is a cross-sectional view showing a panel of the prior art. Comparison table of main components printed by the Employees ’Cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs 1 Panel section 1 A Fluorescent screen 1 B Panel peripheral section 2 Tube neck 3 Cone section 4 Fluorescent film 5 Shielding screen 6 Internal magnetic shielding 7 8 Color purity adjustment magnet 9 Center beam static focus adjustment magnet 1 0 Side beam static focus adjustment magnet 1 1 Electron gun 1 2 Electron beam 1 1 1 Peripheral portion of the effective screen 1 1 2 Diagonal peripheral 1 1 3 Long Dimensions around the axis This paper applies Chinese National Standard (CNS) A4 specifications (210x297 mm) -21-554374 A7 B7 V. Description of the invention (19) 114 Minor axis periphery R 〇 Curvature radius R i Curvature radius tc Panel material The thickness of the surrounding part of the thick ta fluorescent screen is thick. 51 The screen hole (please read the precautions on the back before filling this page). Printed by the Intellectual Property of the Ministry of Economic Affairs and the Staff Consumer Cooperatives. CNS) A4 specification (21 0X297 mm)