451174 A7 B7 經濟部智慧財產局員工消費合作社印製 五、發明說明（） 詳細說明 C發明的背景〕 本發明關於申請專利範圍主項的一種扁平顯示器的後 方照明裝置。已有習知之照明裝置，將平坦顯示器作後方 照明，例如歐洲專利EP0544332A1所發表者。依此背景技 術的後方照明裝置有光導體，由於製造程序之故，光導體 的邊緣並非理想的角形，而係略修圓者。這點在邊緣區域 使光耦入的作用改變。此外，耦入的光在邊緣的角度分佈 亦改變。在邊緣較弱之耦入光會在光導體中擴散，因此在 後照明裝置操作時造成暗或亮的條紋，當目光投在光導體 上時可看到這些條紋。如此，顯示器亮度的均勻性會受影 響’如將該修圖部曲線的半徑減小，這種作用可以減少。 但這要花較高成本以製造光導體，並使光導體邊緣對機械 性影響較敏感。 〔本發明的優點〕 與之相較，具有申請專利範圍主項特點的本發明的裝 置有一優點，即：利用所形成的變寬部，可使得顯示器均 勻性受邊緣修圓的影響不再發生。 利用申請專利範圍副項中所述的措施，可將申請專利 範圍主項中的裝置作有利的進一步發展及改良。最好，光 源設計成至少和光導體的狹邊（光在此處耦入）一樣長（ 包含該變寬部）。依此方式，光可均勻地經由整個光導體 寬度範圍耦入。 此外，一有利作法係將該變寬部做成楔形，因爲此實 3 ------Ί!------裝—— >t/ (請先閱讀背面之注意事項再^5^本頁) ;3 · .線- .i—J.· ..ί\ 本紙張尺度適用中國國家標準<CNS)A4規格（210 X 297公釐） 4 51 1 7 4 Α7 Β7 五、發明說明（） 施例i一方面提供足夠機械穩定性，另方面也節省空間。 另外一有利作法，係將光源以及該光導體之一第一光 區域用一反射器圍住，以將燈的光輻射損失及耦入光導體 中時的損失減少。 [圖式的說明〕 本發明一實施例示於圖式中且在以下說明中詳述。圖 式中： 第一圖係一個背景技術的後方照明裝置， <第二圖係一傳統的光導體邊緣， 第三圖係一個本發明的後方照明裝置， 第四圖係該光導體之一個本發明的變寬部， 第五圖係該變寬部的放大圖， 第六圖係該光導體之另一種本發明的變寬度， 第七圖係用於將一液晶格作後方照明用的本發明之後 方照明裝置’ 第八圖係用於將一液晶格作後方照明用的另一種本發 明i後方照明裝置。 [圖號說明] 請 先 閱 讀 背 意 h 頁 訂 υ 經濟部智慧財產局員工消費合作社印製 (10) 光源 (11)(12) 電端子 (13) 光導體 (14) 狹側 (15) 表面 (16) 虛線 本紙張尺度適用中圉函家標準（CNS)A4規格（2〗〇χ 297公釐） 451174 A7 B7 I ( i I. ί -裝 -----— I 訂if----ί -線 r hjy. (請先閱讀背面之注意事項再Vk本頁) 經濟部智慧財產局員工消費合作社印製 五、發明說明（） (20) (31)(32) ,(33) (34) (35) (36) (37) (38) (41) (42) (43) .(44)(45) (46) (51) (55) _ (61) (62) (63) ,(64)(65) (71) (72) (73) (74) (75) 修圓部 電端子 光導體 狹側 變寬部 部段 顯示區域 端 修圓部 側面 虛線 區域變寬部(35)的邊緣 虛線 圓弧 變寬部 狹側 端 側面 虛線 光源 光導體 反射器 稜鏡膜 散光器 本紙張尺度適用_國國家標準（CNS)A4規格（210 X 297公釐） 4511 7 4 A7 B7 五、發明說明（） (76) 液晶格 (77) 虛線 (78) 狹側 (79) 上側 (80) 光導體 (81) 反射器 (82) 虛線 (83) 上側 (84) 下側 ------.--^---- 裝 i — ·)/ <請先閲讀背面之注意事項再^本頁) 〔實施例的說明〕 第一圖中顯示一種背景技術的傳統後方照明裝置，具 有一光源（10)，該光源（10)設有電端子（11)(12)及一光導體 (13)，該光導體有一狹側(14)，朝向光源(10) 此後方照明 裝_係以上視圖顯未。設在一光導體表面（15)上方的顯示 器(例如一種液晶顯示器)本身則未作圖示。狹側(14)的端緣 用一條虛線（16)圍框住。在第二圖中以放大圖顯示此區域 。光從光源(10)經狹側(14)耦合到光導體（13)中。光作全反 射導經該光導體，並利用光導體上側及/或下側上所設之改 性裝置(Modifikation)(圖未示)被光導體表面（15)向到顯示器 過去。 第二圖顯示第一圖之部段（16)的放大圖β可看到光導 體(1‘3)的狹側(14)。在此放大圖中，所見者非一邊緣而係一 修圓部(20)，由於有這種修圓部(20)使得相對於狹側（14)的 耦入角度(光以此角度耦入)改變。 6 本紙張尺度適用中國國家標準（CNS)A4規格（210 X 297公釐） “SJ· -線- 經濟部智慧財產局員工消費合作社印製 經濟部智慧財產局員工消費合作杜印製 451 1 74 A7 _____B7_ 五、發明說明（） * . 在第三圖中顯示一個本發明的後方照明裝置。一光源 (10)設有電端子(31)(32)。一光導體(33)有一朝向光源(30)的 狹側(34)。變寬部（35)及(36)形成到光導體(33)上，在狹側 (34)兩端。變寬部（35)的區域用虛線(37)圍框住，且在第四 圖中作放大圖示。此處可與第一圖的裝置比較光係從光源 (30)經狹側(34)耦合到光導體(33)中，並藉光導體上側與下 側的改性裝置偏轉到該顯示器（圖中未示），但其顯示區域 利用一虛線(38)標示。圖中未示的改性裝置，舉例而言， 可爲一種設在光導體下側上的網版印刷物(Rasterdmck)或一 種設到該光導體下側及/或上側所設之微構造，特別是微稜 柱。光導體(33)設計成板或楔的形式，其厚度隨著距狹側 (34)距離增加而變小。變寬部(35)與(36)宜互成鏡像對稱。 因此對於部段(37)的放大圖中只選出變寬部(35)。 第四圖顯示光導體(33)之本發明變寬部(35)的一種設計 。第四圖係第三圖的段(37)的放大圖。光導體的狹側(34)— 直通到狹側(34)的一端(41)爲止，狹側在此端過渡到一修圓 部(42)中，且定出該變寬部(35)的一第一側面。一第二側面 (43)定出變寬部(35)的界定，因此變寬部(35)的上視圖呈楔 形。此外有二條虛線(44)(45)，其中第一條虛線(44)和側面 (340夾成50°的角度，而第二條虛線(45)與側面(34)夾成 90°的角度。變寬部(35)成形的方式，使側面(43)與從點 (41)出發並存在二線(44)(45)之間的各光束相交。藉選擇角 度，可將所有從修圓部(42)引起且在導體中在變寬部(35)延 續。，因此顯示器的觀看者看不到它們，只能看到第三圖中 7 本紙張尺度適用t國國家標準（CNS)A4規格（210 x 297公釐） :--I------裝 i J (請先閱讀背面之注意事項本頁) I"1 -線 451 t 74 A7 經濟部智慧財產局員工消費合作社印製 ____B7___ 五、發明說明（） 所示的顯示區域(38)。虛線(46)所標示的區域在第五圖中作 大圖示。 '在第五圖中’在第四圖用(46)標示之區域變寬部(35)的 邊緣作放大圖示。變寬部(35)的側面(34)用虛線(52)延長作 示。側面（43)也利用虛線（51)延長作圖示。延長的虛線 (51)(52)交成~角度α的値在Γ〜50°間，且宜1〇。〜50 °間《這種値依所用材料的折射指數而定》材料的折射指 數越大，則角度α可選得越大，而不會有由修圓部(42)引起 的干擾影響顯示器的形式。修圓部(42)的圓弧(55)的半徑 (55)不大於側面(43)的1/5長度。 ‘在第六圖中顯示該光導體變寬部的另一實施例β此變 寬部可取代第四圖的圍框住的區域；如此。第三圖中的變 寬度(26)就呈鏡像對稱。在此光導體(33)中，有一變寬部 (60) —延長之光導體狹側(61)(它係光導體之一延長的狹側 )(61) ’此狹側係變寬部的一第一側面]，狹側（61)之一端 (62) ，以及一第二側面(63)。一條虛線(64)與該延長之狹側 (61) 夾了一 50°的角度，而一條虛線(64)與該延長的狹側 (63) 夾成一90°的角度，作用方式與第四圖中所示者相同 。虛線(64)(65)界定7 —區域，在此區域中，由端點(62)出 發經過光導體的光束被第二側面(63)限制，因此光束不會 —値跑到第三圖的顯示區域(38)。 第七圖中，一個本發明的後方照明裝置整合到一液晶 顯示器中。此顯示器以橫截面作圖示。圖中顯示一桿形光 源(71) ’ 一光導體(72)及一反射器(73)，反射器(73)位於該光 $ (請先閱讀背面之注意事項再'^本頁) 訂·- --線_ .ίν- 本紙張尺度適用中國國家標準（CNS)A4規格（210 X 297公釐） 451174 A7 五、發明說明（） 導體與光源後方。光導體(72)有一上側(79)及一狹側(78)， 光耦入該狹側中。光導體上方有一稜鏡膜(74)，一個散光 器(75)，及液晶格(76) »此外顯示一條虛線(77) 〇反射器(73) 用於減少光損失以及把光源的光經狹側(78)偏轉到光導體 (72)中。稜鏡膜(74)(它宜由具有施覆之微稜鏡構造的薄膜 構成)將光沿液晶顯示器(76)方向瞄準(kollimieren)。散光器 (75)係可有可無者，且用於把後方照明之殘留的不均情形 除去。液晶格(76)由個別影像元件(圖未示)構成，其吸光作 用可利用外部的控制裝置切換，故產生一種影響圖形。其 他設到液晶格上的電子路未作圖示。在液晶格的位置也可 施覆一膜或一板(Tafel)，它在作後方照明時可使影像顯示 。虛線(77)界定出線(77)與狹側間的區域，本發明的變寬部 在耽區域側邊形成，.如第三圖所示》 第八圖中顯示用於一液晶裝置中的本發明後方照明裝 置的另一實施例。和第七圖相較，光源(71)、稜鏡膜(74)、 散光器(75) '液晶顯示器(76)與狹側並無改變。此外，一光 導體(80)呈楔形’設有微稜鏡(圖未示），微稜鏡設在光導體 (80)的一上側(83)及/或一下側(84)。一反射器(81)配合此楔 形。一條虛線(82)表示線(82)與狹側(78)間的區域，本發明 的變寬部在此區域中形成，如第三圖所示。 9 本紙張尺度遶用中國國家標準（CNS)A4規格（210 X 297公爱） (請先閱讀背面之注意事項再%k本頁) 經濟部智慧財產局員工消費合作社印製451174 A7 B7 Printed by the Consumer Cooperatives of the Intellectual Property Bureau of the Ministry of Economic Affairs 5. Description of the invention () Detailed description C Background of the invention] The present invention relates to a rear lighting device for a flat display, which is the main subject of the scope of patent application. Conventional lighting devices have been used to illuminate flat displays for rear lighting, such as those published by European Patent EP0544332A1. The rear lighting device according to this background technology has a light guide. Due to the manufacturing process, the edge of the light guide is not an ideal angle, but is slightly rounded. This changes the effect of photocoupling in the edge area. In addition, the angular distribution of the coupled light at the edges also changes. Weakly coupled light at the edges will diffuse in the light guide, and therefore cause dark or bright streaks when the rear lighting device is in operation. These stripes can be seen when looking at the light guide. In this way, the uniformity of the brightness of the display is affected. If the radius of the curve of the modified portion is reduced, this effect can be reduced. However, this costs a lot of money to make the light guide and makes the edge of the light guide more sensitive to mechanical influences. [Advantages of the present invention] Compared with this, the device of the present invention, which has the main features of the scope of patent application, has the advantage that the use of the formed widened portion can make the display uniformity no longer affected by edge rounding . The measures described in the sub-item of the scope of patent application can be used to further develop and improve the devices in the main scope of the patent application. Preferably, the light source is designed to be at least as long as the narrow side of the light conductor (where the light is coupled in) (including the widened portion). In this way, light can be evenly coupled across the entire width of the photoconductor. In addition, it is a good practice to make the widened part wedge-shaped, because this is actually 3 ------ Ί! ------ install-> t / (Please read the precautions on the back first ^ 5 ^ page); 3 · .line-.i—J. · ..Ί \ This paper size applies to Chinese National Standards < CNS) A4 (210 X 297 mm) 4 51 1 7 4 Α7 Β7 V. Description of the invention () Example i provides sufficient mechanical stability on the one hand and saves space on the other. Another advantageous method is to surround the light source and the first light region of the light guide with a reflector to reduce the loss of light radiation from the lamp and the loss when coupled into the light guide. [Explanation of the drawings] An embodiment of the present invention is shown in the drawings and described in detail in the following description. In the drawings: the first picture is a background lighting device, < the second picture is a conventional light guide edge, the third picture is a rear lighting device of the present invention, and the fourth picture is one of the light guides In the widened part of the present invention, the fifth figure is an enlarged view of the widened part, the sixth figure is another variable width of the light conductor of the present invention, and the seventh figure is for using a liquid crystal cell for rear illumination. The eighth figure of the rear illumination device of the present invention is another rear illumination device of the present invention i, which is used for rear-illuminating a liquid crystal cell. [Illustration of the drawing number] Please read the introductory page h. Printed by the Consumer Cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs (10) Light source (11) (12) Electrical terminal (13) Light conductor (14) Narrow side (15) Surface (16) Dashed line This paper applies the standard of Chinese letter standard (CNS) A4 (2〗 〇χ 297mm) 451174 A7 B7 I (i I. ί-装 -----— I order if --- -ί-线 r hjy. (Please read the notes on the back before Vk page) Printed by the Consumer Cooperatives of the Intellectual Property Bureau of the Ministry of Economic Affairs 5. Description of Inventions () (20) (31) (32), (33) ( 34) (35) (36) (37) (38) (41) (42) (43). (44) (45) (46) (51) (55) _ (61) (62) (63), (64) (65) (71) (72) (73) (74) (75) Rounded part Electric terminal light conductor narrow side widened part display area end rounded part side dotted area widened part (35) The edge of the dotted line arc widening part narrow side end side dotted line light source light conductor reflector 稜鏡 film diffuser This paper size applies _ national national standard (CNS) A4 specifications (210 X 297 mm) 4511 7 4 A7 B7 V. Description of the invention () (76) Liquid crystal cell (77) Dotted line (78) Narrow side (79) Upper side (80) Photoconductor (81) Reflector (82) Dotted line (83) Upper side (84) Lower side --------- ^ ---- Install i — ·) / < Please read the precautions on the back first ^ Page) [Explanation of the embodiment] The first figure shows a conventional conventional rear lighting device having a light source (10) provided with electrical terminals (11) (12) and a light conductor (13) ), The light guide has a narrow side (14), and the rear lighting device towards the light source (10) is shown in the above view. A display (e.g. a liquid crystal display) provided above a light-conducting surface (15) is not shown. The end of the narrow side (14) is framed by a dashed line (16). This area is shown enlarged in the second image. Light is coupled from the light source (10) into the light conductor (13) via the narrow side (14). The light is totally reflected and guided through the photoconductor, and a modification device (not shown) provided on the upper side and / or the lower side of the photoconductor is directed toward the display by the photoconductor surface (15). The second figure shows an enlarged view β of the section (16) of the first figure, and the narrow side (14) of the light guide (1'3) can be seen. In this enlarged view, the viewer sees a rounded portion (20) instead of an edge. Due to the rounded portion (20), the coupling angle with respect to the narrow side (14) (light is coupled at this angle) )change. 6 This paper size applies the Chinese National Standard (CNS) A4 specification (210 X 297 mm) "SJ · -line-Printed by the Consumer Cooperatives of the Intellectual Property Bureau of the Ministry of Economic Affairs, printed by the employee's consumer cooperation of the Intellectual Property Bureau of the Ministry of Economic Affairs, Du printed 451 1 74 A7 _____B7_ V. Description of the invention () *. A rear lighting device of the present invention is shown in the third figure. A light source (10) is provided with electrical terminals (31) (32). A light conductor (33) has a light source ( 30) of the narrow side (34). The widened portions (35) and (36) are formed on the light conductor (33) at both ends of the narrow side (34). The area of the widened portion (35) is indicated by a dotted line (37) It is enclosed and enlarged in the fourth figure. Compared with the device in the first figure, the light system is coupled from the light source (30) to the light conductor (33) through the narrow side (34), and borrows light. The modification devices on the upper and lower sides of the conductor are deflected to the display (not shown), but the display area is indicated by a dashed line (38). The modification devices not shown in the figure can be, for example, Screen printing (Rasterdmck) on the underside of a light conductor or a microstructure provided on the underside and / or upper side of the light conductor, especially a microprism. Light guide The body (33) is designed in the form of a plate or a wedge, and its thickness becomes smaller as the distance from the narrow side (34) increases. The widened portions (35) and (36) should be mirror-symmetrical to each other. Therefore, for the section (37 Only the widened portion (35) is selected in the enlarged view. The fourth figure shows a design of the widened portion (35) of the present invention by the light conductor (33). The fourth figure is an enlargement of the paragraph (37) of the third figure Figure. The narrow side (34) of the light conductor-straight to one end (41) of the narrow side (34), at which the narrow side transitions into a rounded portion (42), and the widened portion (35 ) A first side. A second side (43) defines the definition of the widened portion (35), so the top view of the widened portion (35) is wedge-shaped. In addition, there are two dotted lines (44) (45), of which The first dashed line (44) and the side surface (340 are at an angle of 50 °, and the second dashed line (45) is at an angle of 90 ° to the side surface (34). The widening portion (35) is shaped so that the side surface (43) Intersect with each light beam starting from point (41) and existing between two lines (44) (45). By selecting the angle, all caused by the rounded portion (42) and widened in the conductor (35) Continuation. Therefore, the viewer of the display cannot see them, only the third picture 7 This paper size applies to the national standard (CNS) A4 specification (210 x 297 mm): --I ------ install i J (please read the precautions on the back page first) I " 1 -line 451 t 74 A7 Printed by the Consumer Cooperatives of the Intellectual Property Bureau of the Ministry of Economic Affairs ____B7___ V. The display area (38) shown in the description of the invention (38). The area marked by the dashed line (46) is shown in the fifth figure as a big picture. 'In the fifth figure', the edge of the widened portion (35) of the area indicated by (46) in the fourth figure is enlarged. The side (34) of the widened portion (35) is extended with a dashed line (52). The side surface (43) is also extended with a dashed line (51) for illustration. The extended dashed lines (51) (52) intersect with 角度 of angle α between Γ and 50 °, and preferably 10. ~ 50 ° "This depends on the refractive index of the material used" The larger the refractive index of the material, the larger the angle α can be selected without the interference caused by the rounded portion (42) affecting the display. form. The radius (55) of the arc (55) of the rounded portion (42) is not more than 1/5 the length of the side surface (43). ‘Another embodiment showing the widened portion of the photoconductor in the sixth figure β This widened portion may replace the area enclosed by the fence in the fourth figure; so. The variable width (26) in the third figure is mirror-symmetric. In this light conductor (33), there is a widened portion (60)-the narrow side (61) of the extended light conductor (which is one of the light guides extended narrow side) (61) 'This narrow side is the widened portion A first side], one end (62) of the narrow side (61), and a second side (63). A dotted line (64) is at an angle of 50 ° with the narrow side (61) of the extension, and a dotted line (64) is at an angle of 90 ° with the narrow side (63) of the extension. The ones shown are the same. The dashed lines (64) (65) define a 7-area, in which the light beam passing through the light conductor from the end point (62) is restricted by the second side (63), so the light beam will not-run to the third picture Display area (38). In the seventh figure, a rear lighting device of the present invention is integrated into a liquid crystal display. This display is illustrated in cross section. The figure shows a rod-shaped light source (71) 'a light conductor (72) and a reflector (73), the reflector (73) is located in the light $ (Please read the precautions on the back before' ^ this page) Order · ---Line_ .ίν- This paper size is applicable to Chinese National Standard (CNS) A4 (210 X 297 mm) 451174 A7 V. Description of the invention () Behind the conductor and light source. The light conductor (72) has an upper side (79) and a narrow side (78) into which light is coupled. There is a diaphragm (74), a diffuser (75), and a liquid crystal cell (76) above the light conductor. In addition, a dashed line (77) is shown. The reflector (73) is used to reduce light loss and narrow the light of the light source. The side (78) is deflected into the light guide (72). The diaphragm (74) (which is preferably composed of a thin film having a coated microdiaphragm structure) aims the light (kollimieren) in the direction of the liquid crystal display (76). The diffuser (75) is optional and is used to remove residual unevenness of the rear lighting. The liquid crystal cell (76) is composed of an individual image element (not shown), and its light absorption function can be switched by an external control device, so a pattern is affected. The other electronic circuits provided on the LCD cell are not shown. A film or a plate (Tafel) can also be applied at the position of the liquid crystal cell, which can display images when it is used for rear illumination. The dashed line (77) defines the area between the line (77) and the narrow side. The widened part of the present invention is formed on the side of the delay area, as shown in the third figure. Another embodiment of the rear lighting device of the present invention. Compared with the seventh figure, the light source (71), diaphragm (74), diffuser (75) 'and the liquid crystal display (76) are not changed from the narrow side. In addition, a photoconductor (80) is wedge-shaped and is provided with micro-rollers (not shown), which are arranged on an upper side (83) and / or a lower side (84) of the light guide (80). A reflector (81) fits this wedge. A dashed line (82) indicates an area between the line (82) and the narrow side (78), and the widened portion of the present invention is formed in this area, as shown in the third figure. 9 This paper size uses the Chinese National Standard (CNS) A4 specification (210 X 297 public love) (Please read the precautions on the back before% k this page) Printed by the Consumer Cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs