200822171 九、發明說明 【發明所屬之技術領域】 本發明關於使用於閃爍點燈之螢光燈、背光裝置及液 晶顯示裝置。 【先前技術】 使用於液晶電視等的背光裝置之點燈方式，以往是以 ί 使燈常時點燈之方式（以下稱爲以往方式）爲主流，但近 年，使燈開、關（ON/OFF )之點燈方式（以下稱爲閃爍 點燈方式）之開發持續進行。 在閃爍點燈方式，一般，配合所配置的複數個燈之開 、關的時間點進行點燈之閃爍點燈方式，或藉由偏移燈之 開、關的時間點，依次一邊捲動一邊點燈之掃描點燈方式 等爲眾所皆知。無論在這哪一種方式，均有藉由與液晶的 驅動之組合，可防止在動畫顯示時所產生之動作模糊的優 I 點。 即，這些閃爍點燈方式是作爲用來解決一般被說明對 . 動畫弱之液晶電視的課題之手段受到注目。這種閃爍點燈 . 方式的背光裝置被揭示於如國際公開第04/05 3 826號、曰 本特開2004-87489號公報、日本特開2003-84739號公報 、日本特開2002-6815號公報等。 但，在使用這種閃爍點燈方式的背光裝置，雖可某種 程度地防止在動畫顯示時所產生之動作模糊，但卻無法充 分防止，依然會殘留有殘影之問題存在。 -5- 200822171 對於此問題’發明者們硏究的結果發現下述結論，即 ，也會因使用於構成背光裝置的螢光燈之螢光體的應對速 度所引起。即，將以往方法所使用的螢光燈使用於閃爍點 燈方式之情況時，由於對應螢光燈之開、關，螢光體會太 慢反應，故產生上述問題。 【發明內容】 針對適合於這種閃爍點燈方式之螢光燈的螢光體進行 反復硏究之結果’由於比起以往，能夠達到殘影不易殘留 之閃爍點燈用螢光燈、背光裝置及液晶顯示裝置，而申請 本發明。 本發明之目的在於提供殘影不易殘留之閃爍點燈用螢 光燈、背光裝置及液晶顯示裝置。 爲了達到上述目的，本發明之閃爍點燈用螢光燈，其 特徵爲：在玻璃容器的內面，形成有由1 /1 0殘光時間爲 5msec以下之複數種類螢光體所構成之多波長螢光體。 又，在本發明之閃爍點燈用螢光燈，其中，前述螢光 體，其90%發光上升時間爲5msec以下。 且，在本發明之閃爍點燈用螢光燈，其中，前述螢光 體包含有由 Sn2+、Pr3+、Eu2+、Eu3+、Ce3+、Tbw中所選 擇之活化劑。 且，在本發明之閃爍點燈用螢光燈，其中，前述螢光 體爲包含紅色、綠色、藍色的螢光體之多波長螢光體，紅 色螢光體包含由Sn2+、Pr3+、Eu2+、Eu3 +所選擇之活化劑 -6- 200822171 ，綠色螢光體包含由Eu2+、Ce3+、Tb3 +所選擇之活化劑’ 藍色螢光體包含由Eu2 +所選擇之活化劑。 又，本發明之背光裝置，其特徵爲：具備有：框體； 收容於前述框體內的前述螢光燈；及可使前述螢光燈閃爍 點燈之點燈電路。 又，本發明之液晶顯示裝置，其特徵爲：具備有：上 述背光裝置；及配置於此背光裝置的發光面側之液晶面板 〇 若根據本發明的話，能夠達到殘影不易殘留之閃爍點 燈用螢光燈、背光裝置及液晶顯示裝置。 【實施方式】 以下，參照圖面，說明關於使用本發明的實施形態之 閃爍點燈用螢光燈的背光裝置。 (第1實施形態） 圖1是用來說明關於本發明的第1實施形態之背光裝 置的圖。 本實施形態之背光裝置BL爲直下型方式。背光裝置 BL之框體是以前框架la與後框架lb所構成。在前框架 1 a，形成有開口面。後框架1 b爲有底開口形狀，在其內 側形成高反射性的反射面。 在後框架1 ^的內部’以各自的管軸大致成爲平行的 方式配置有複數支細長形狀的螢光燈2。再者，在本實施 -7 - 200822171 形態，使用冷陰極螢光燈，但亦可爲熱陰極螢光燈、外面 電極螢光燈、平面型螢光燈等，其種類、形狀或大小等未 特別限定。 圖2顯示螢光燈2之具體構造。 螢光燈2，主要部分是以例如軟質玻璃製的玻璃容器 2 1所構成，在其內部，封入有由Ne、Ar所構成的混合氣 體與水銀。在玻璃容器2 1的兩端，封裝固定有電極底座 22a、22b。電極底座22a、22b是以電極22al、22bl與玻 璃珠22a2、22b2所構成。 在玻璃容器21的內面，形成有螢光體23。在本發明 ，期望使用應對速度快之螢光體。圖3是用來說明塗佈 Y2 03 : Eu”的螢光體之螢光燈的發光特性之圖。再者，該 圖中的橫軸顯示時間，縱軸顯示電壓或電流値。圖中的波 形（A )爲用來對螢光燈進行開、關控制之電壓波形的開 關訊號，波形（B )爲燈電壓波形，波形（c )爲燈電流波 形，波形（D )爲藉由發光二極體將燈的發光強度進行光 電變換所獲得之輸出電壓波形。這些波形是藉由示波器來 測定顯示者。 由圖可得知’在螢光燈2，對開關訊號波形（A )， 燈電壓及燈電流波形（B ) ( C )不會遲緩，而產生反應， 但燈的發光波形（D )之反應會有延遲傾向。這是受到螢 光體的應對速度之影響所產生的結果。因此，最期望使用 應對速度與開關訊號（A )相同速度之螢光體，但，這樣 的螢光體之實現極爲困難。 -8 - 200822171 因此，本發明者調查各種螢光體的應對速度， 1 /1 〇殘光時間（最大的亮度設爲A時，燈的亮度d 爲0 · 1 A爲止之時間）大約1 m s e c〜1 0 m s e C之3波 燈。然後，對10位被實驗者，進行以該螢光燈投 上的動畫’封該動畫是否感覺到殘影之貫驗。 其結果顯示於圖4。由圖4可得知，若1 /1 0殘 爲5msec以下的話，在人的眼中不易看見殘影， 3msec以下的話，幾乎無法辨識爲殘影。順便一題 所示的 Y2 〇3 : Eu3 +之螢光體，90%發光上升時間 殘光時間均爲大約2.5msec，因此，閃爍點燈之應 快，適合作爲本發明之螢光體。再者，在幾乎所有 體，發光的上升與發光的下降具有一定關係。例如 的螢光體，1/10殘光時間爲2.5msec，相對於此， 光上升時間（燈的亮度由0成爲0.9 A爲止之時間 約爲3msec。即，1/10殘光時間與90%發光上升時 成爲相同結果，故，發光下降快的螢光體也可稱爲 升快之螢光體。 在圖1中，在後框架1 b之開口側，配置有擴散 作爲擴散板3，期望使用可減低發光不均，且效率 度下降之透過率爲50%〜80%者。 在擴散板3上，配設有光學薄片4。作爲光學 能夠配合目的，使用一片或複數片之擴散薄片、或 片。 在後框架1 b的內側，配置有點燈電路5。作爲 製作當 & A成 長螢光 影液晶 光時間 且若爲 ，圖 3 、1/10 對速度 的螢光 ，圖 3 9 0 %發 )也大 間大致 發光上 板3。 不會過 薄片， 稜鏡薄 此點燈 -9- 200822171BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fluorescent lamp, a backlight device, and a liquid crystal display device used for a flashing lighting. [Prior Art] The lighting method of a backlight device used in a liquid crystal television or the like has been mainly used to illuminate a lamp at a constant time (hereinafter referred to as a conventional method). However, in recent years, the lamp is turned on and off (ON/OFF). The development of the lighting method (hereinafter referred to as the flashing lighting method) continues. In the flashing lighting mode, generally, the flashing lighting mode of lighting is performed in accordance with the time when the plurality of lamps are turned on and off, or by shifting the time of turning the light on and off, and scrolling one by one. The scanning and lighting method of lighting is well known. In either case, the combination of the driving of the liquid crystal and the liquid crystal can prevent the blurring of the motion blur generated during the animation display. In other words, these methods of flashing lighting have been attracting attention as a means for solving the problem of a liquid crystal television that is generally described as being weak. Such a flashing light is disclosed in, for example, International Publication No. 04/05 3 826, 曰本特开2004-87489, Japanese Patent Laid-Open No. 2003-84739, and Japanese Patent Laid-Open No. 2002-6815 Bulletin and so on. However, in the backlight device using such a flashing lighting method, although the blurring of the motion generated during the animation display can be prevented to some extent, it is not sufficiently prevented, and the problem of residual image remains. -5- 200822171 As a result of the inventors' research, the following conclusions were found, that is, also caused by the response speed of the phosphor used for the fluorescent lamp constituting the backlight device. In other words, when the fluorescent lamp used in the conventional method is used in the flashing lighting mode, the above-mentioned problem occurs because the fluorescent material reacts too slowly depending on the opening and closing of the fluorescent lamp. [Summary of the Invention] The result of the repeated investigation of the phosphor of the fluorescent lamp suitable for the above-described flashing lighting method is a fluorescent lamp or a backlight for a flashing light that is less likely to remain in the residual image than the conventional one. And a liquid crystal display device, and apply to the present invention. An object of the present invention is to provide a fluorescent lamp for a flashing light, a backlight device, and a liquid crystal display device in which residual images are less likely to remain. In order to achieve the above object, a fluorescent lamp for a flashing light lamp according to the present invention is characterized in that a plurality of phosphors having a residual light time of 5 msec or less are formed on the inner surface of the glass container. Wavelength phosphor. Further, in the fluorescent lamp for a flashing lighting of the present invention, the phosphor has a 90% light emission rise time of 5 msec or less. Further, in the fluorescent lamp for a flashing lighting of the present invention, the phosphor includes an activator selected from the group consisting of Sn2+, Pr3+, Eu2+, Eu3+, Ce3+, and Tbw. Further, in the fluorescent lamp for a flashing lighting according to the present invention, the fluorescent material is a multi-wavelength phosphor including red, green, and blue phosphors, and the red phosphor includes Sn2+, Pr3+, and Eu2+. Activator-6-200822171, the green phosphor contains an activator selected from Eu2+, Ce3+, Tb3+' The blue phosphor contains an activator selected from Eu2+. Further, a backlight device of the present invention includes: a housing; the fluorescent lamp housed in the housing; and a lighting circuit for blinking the fluorescent lamp. Moreover, the liquid crystal display device of the present invention is characterized in that: the backlight device is provided; and the liquid crystal panel disposed on the light-emitting surface side of the backlight device, according to the present invention, is capable of achieving flashing lighting in which residual image is not easily left. Fluorescent lamps, backlights, and liquid crystal display devices are used. [Embodiment] Hereinafter, a backlight device using a fluorescent lamp for a flashing light lamp according to an embodiment of the present invention will be described with reference to the drawings. (First Embodiment) Fig. 1 is a view for explaining a backlight device according to a first embodiment of the present invention. The backlight device BL of the present embodiment is of a direct type. The frame of the backlight device BL is composed of a front frame la and a rear frame lb. In the front frame 1 a, an open face is formed. The rear frame 1b has a bottomed opening shape, and a highly reflective reflecting surface is formed on the inner side thereof. A plurality of fluorescent lamps 2 having a plurality of elongated shapes are disposed in the inner portion of the rear frame 1^ so that the respective tube axes are substantially parallel. Further, in the embodiment of the present invention -7 - 200822171, a cold cathode fluorescent lamp is used, but a hot cathode fluorescent lamp, an external electrode fluorescent lamp, a flat fluorescent lamp, or the like may be used, and the type, shape, or size thereof may not be used. Specially limited. FIG. 2 shows a specific configuration of the fluorescent lamp 2. The fluorescent lamp 2 is mainly composed of, for example, a glass container 21 made of soft glass, and a mixed gas of Ne and Ar and mercury are enclosed therein. At both ends of the glass container 21, electrode bases 22a, 22b are fixed to the package. The electrode bases 22a and 22b are composed of electrodes 22a1 and 22b1 and glass beads 22a2 and 22b2. A phosphor 23 is formed on the inner surface of the glass container 21. In the present invention, it is desirable to use a phosphor that responds to a fast speed. Fig. 3 is a view for explaining the light-emitting characteristics of a fluorescent lamp coated with a phosphor of Y2 03 : Eu". Further, in the figure, the horizontal axis shows time and the vertical axis shows voltage or current 値. Waveform (A) is the switching signal of the voltage waveform used to turn on and off the fluorescent lamp. The waveform (B) is the lamp voltage waveform, the waveform (c) is the lamp current waveform, and the waveform (D) is the light emission. The output voltage waveform obtained by photoelectric conversion of the luminous intensity of the lamp. These waveforms are measured by an oscilloscope. It can be seen from the figure that 'in the fluorescent lamp 2, the switching signal waveform (A), the lamp voltage And the lamp current waveform (B) (C) does not delay, but reacts, but the reaction of the lamp's illuminating waveform (D) tends to be delayed. This is the result of the response speed of the phosphor. It is most desirable to use a phosphor that responds to the same speed as the switching signal (A), but the realization of such a phosphor is extremely difficult. -8 - 200822171 Therefore, the inventors investigated the response speed of various phosphors, 1 /1 〇 afterglow time (maximum bright When set to A, the brightness d of the lamp is 0 · 1 A. The time is about 1 msec to 1 0 m. The 3 wave of C. Then, for the 10 subjects, the animation with the fluorescent lamp is applied. 'Whether the animation is perceived as a residual image. The result is shown in Fig. 4. As can be seen from Fig. 4, if the 1 / 1 0 residual is 5 msec or less, it is difficult to see the residual image in the human eye, and if it is 3 msec or less. It is almost impossible to recognize the residual image. By the way, Y2 〇3: Eu3 + phosphor, 90% of the rise time of the glow time is about 2.5msec, therefore, the flashing light should be fast, suitable for The phosphor of the present invention. Further, in almost all cases, the rise in luminescence has a certain relationship with the decrease in luminescence. For example, a phosphor has a 1/10 afterglow time of 2.5 msec, whereas the light rise time ( The brightness of the lamp is about 3 msec from 0 to 0.9 A. That is, the 1/10 afterglow time is the same as the 90% illuminating rise, so that the phosphor with a fast decrease in luminescence can also be called a spurt. In Fig. 1, on the open side of the rear frame 1b, diffusion is disposed as the diffusion plate 3 It is desirable to use a transmittance of 50% to 80% which reduces the unevenness of the light emission, and the efficiency is lowered. On the diffusion plate 3, an optical sheet 4 is disposed. As an optically compatible object, one or a plurality of diffusion sheets are used. On the inner side of the rear frame 1 b, a little lamp circuit 5 is arranged. As a result of making the & A growth fluorescent liquid crystal light time, if it is, Figure 3, 1/10 versus the speed of the fluorescence, Figure 3 9 0 % hair) also roughly illuminates the upper plate 3. It will not be thin, thin this light-9-200822171
電路5，能使螢光燈2閃爍點燈者的話即可，具代表性的 爲例如 PWM ( Pulse Width Modulation)電路。在此 PWM 電路之情況，期望在頻率爲 50〜3 00Hz、負載（duty )比 爲1 〇〜70%的範圍，使燈點燈。此時，由抑制殘影的觀點 來看，期望設定頻率與負載比，燈關（OFF )的期間較 1 /1 〇殘光時間長。 以下，顯示本發明的背光裝置之實施例及比較例形態 〇 背光裝置 BL :尺寸=32英吋（大約 760mmx大約 440mm ) 螢光燈：冷陰極螢光燈，內徑=2.0mm，外徑=3.0mm ，燈電流=6· 0mA，使用支數=16支，燈間距=23.8mm，螢 光燈2與擴散板3之距離=1 4mm 螢光體：Y2 〇3 : Eu3+ ( R ) ，Y2Si5 : Tb3+ ( G )，The circuit 5 can be used to flash the fluorescent lamp 2, and is typically a PWM (Pulse Width Modulation) circuit. In the case of this PWM circuit, it is desirable to light the lamp at a frequency of 50 to 300 Hz and a duty ratio of 1 〇 to 70%. At this time, from the viewpoint of suppressing the afterimage, it is desirable to set the frequency to the duty ratio, and the period of the OFF (OFF) is longer than the 1 / 1 〇 afterglow time. Hereinafter, an embodiment of the backlight device of the present invention and a comparative example are shown. The backlight device BL: size = 32 inches (about 760 mm x about 440 mm) Fluorescent lamp: cold cathode fluorescent lamp, inner diameter = 2.0 mm, outer diameter = 3.0mm, lamp current = 6·0mA, use count = 16, lamp spacing = 23.8mm, distance between fluorescent lamp 2 and diffuser 3 = 4 mm Phosphor: Y2 〇 3 : Eu3+ ( R ) , Y2Si5 : Tb3+ ( G ),
BaMg2Ali〇Oj7 ： Eu2+ ( B) 擴散板：透過率=60% 光學薄片4:擴散薄片、稜鏡薄片 點燈電路5 : PWM電路，頻率=50Hz，負載比=50% (比較例1 ) 螢光體 23 : Y2 03 : Eu3+ ( R ) ，LaP04 : Ce3+、Tb3 + (G) ，BaMg2Al10O17:Eu2+(B) 除了螢光體23以外，其餘與實施例1相同結構。 圖5是用來說明關於藉由閃爍點燈來將實施例1的燈 -10- 200822171 進行閃爍點燈時的發光特性之圖。圖6是用來說明關於藉 由閃燦點燈來將比較例1的燈進行閃爍點燈時的發光特性 之圖。在這些圖中，橫軸顯示時間，縱軸顯示電壓或電流 値。波形（A )爲用來對螢光燈進行開、關控制之電壓波 形的開關訊號，波形（B )爲燈電壓波形，波形（C )爲燈 電流波形，波形（D )爲藉由發光二極體將燈的發光強度 進行光電變換所獲得之輸出電壓波形。 當比較圖5與圖6的波形時可得知，比起比較例1 ’ 實施例之燈的應對速度較快。具體而言，實施例1的1/10 殘光時間大約爲3 m s e c，比較例大約爲7 m s e c，實施例1 可較快關燈。又，關於90%發光上升時間，實施例1大約 3msec (不及3msec )，比較例1爲大約趨近8 m s e c。 再者，將各自的燈搭載於液晶顯示裝置，放映動畫之 情況，可一眼看出，實施例1幾乎不會殘留殘影，但比較 例1會殘留有殘影，動畫模糊。又，在爲了進一步消除殘 影，而於燈關（OFF )之時間點關閉液晶的狀態下加以使 用的情況，即，僅可在燈關的期間所獲得的輝度之狀態下 ，比較兩者的輝度。其結果，對負載比爲100%時的燈之 光束的兩者之輝度，實施例1大約爲9 5 %，比較例大約爲 7 0%。即，使用實施例1之液晶顯示裝置明顯感到明亮。 形成這種結果之理由，可推測如下： 實施例1與比較例1之差異，如圖7所示，僅在使用 對開、關訊號，應對速度不同之綠色螢光體的這一點。但 ，由如圖、6可得知，當作爲3波長螢光體時，在燈的發 -11 - 200822171 光上升及殘光上會產生大的差異。由此可推測 塗佈有3波長螢光體的螢光燈2進行閃燦點燈 R (紅）、G (綠）、藍（B)的螢光體中之任 對速度慢的話，則螢光燈的應對速度變慢。 因此，在燈形成組合有各種螢光體的3波 行實驗，藉此確認了，在這些所有螢光體中， 慢的螢光體決定3波長螢光體之應對速度。因 點燈用3波長螢光燈，需要組合在所有RGB 最快之螢光體來加以使用。再者，即使在混合 藍、深紅等的螢光體之4波長螢光體、或混合 螢光體的多波長螢光體，在所有的螢光體之應 ，可達到發光的應對速度快之螢光燈。 在此，本發明者進一步硏究發現，螢光體 主要是與螢光體的活化劑有關之事實。即，螢 以Y2 03 : Eu3 +表示，一般Y2 03被稱爲母體， 活化劑，由圖8可得知，螢光體的應對速度大 化劑。因此，著眼螢光體的活化劑進行了實驗 以從 Sn2+、Pr3+、Eu2+、Eu3+、Ce3+、Tb3+中 化劑所構成的螢光體的話，容易達到5msec J 殘光時間。其中，由於E u3 +或T b3 +之活化劑， 爲數msec，故，也會有因與母體之組合使1/1 超過5msec之螢光體存在。因此，在這些之情 殘光時間爲5msec以下的螢光體適用於閃爍點 Sn2+、pr3+、Eu2+、Ce3+的活化劑，90%發光. 到，在使用 之情況，在 一個，若應 長螢光體進 應對速度最 此，在閃爍 中應對速度 了紅、綠、 較其更多之 對速度快時 的應對速度 光體的組成 Eu3 +被稱爲 致依存於活 得知，若爲 所選擇之活 以下的 1 / 1 0 其應對速度 〇殘光時間 況，僅1 / 1 0 燈。另外， 上升時間、 -12- 200822171 1 /1 〇殘光時間均爲0 · 1 m s e c左右，對開、關訊號，螢光體 幾乎不會延遲地應對，故，特別適用於閃爍點燈的用途。 順便一提，在使用複數種活化劑之情況，在複數個活化劑 中應對速度最慢的活化劑之特性可作爲該螢光體的應對速 度來獲得。例如，比較例1之綠色螢光體之LaP04 : Ce3 + 、Tb3 +的情況，雖包含應對速度快之Ce3+，但會成爲應對 速度較其慢的Tb3 +之應對速度。即，在有複數種活化劑存 在之情況，當包含其中一者爲應對速度慢之活化劑時，無 法理想地適用於作爲用於閃爍點燈之螢光體。 再者，活化劑，會因其種類、價數，使螢光體的特性 改變，故，針對期望的每種發光色，會有可使用之活化劑 與不能使用之活化劑。若爲上述Sn2+、Pr3+、Eu2+、Eu3 + 、Ce3+、Tb3+之活化劑的話，可將 Sn2+、Pr3+、Eu2+、 Eu3 +使用於紅色螢光體，將Eu2+、Ce3 +使用於綠色螢光體 ，將Tb3+、Eu2 +使用於藍色螢光體。 其次，如圖9所示，作成採用各種RGB螢光體之3 波長螢光燈，進行應對速度之實驗。其結果，90%發光上 升時間，實施例 2、3、5大約爲 3msec，實施例 4爲 lmsec以下，比較例2、3爲10msec以上。又，1/10殘光 時間，實施例2、3、5大約爲3msec，實施例4爲lmsec 以下，比較例2大約爲6msec，比較例3爲10msec以上 。由上述可確認到，若爲應對速度快之螢光體組合的話， 任一組合，其應對速度快，能適用於閃爍點燈方式之背光 裝置。 -13- 200822171 又’本發明之螢光燈，對藉由PWM方式進行調光之 情況亦極爲有效。即，調光主要是爲了調整對比的目的而 進行，其結果，亦可獲得殘影不易殘留之效果。 因此，在第1實施形態，藉由使用在玻璃容器21的 內面塗佈1/10殘光時間爲5msec以下之RGB螢光體23之 螢光燈’進行閃爍點燈，能夠提供殘影不易殘留之背光裝 置。又，這樣的螢光體，幾乎90%發光上升時間也爲 5msec以下，故，在使燈與液晶之開關（ΟΝ/OFF )同步來 構成液晶顯示裝置之情況，燈的輝度損失少，可達到高輝 度。 具體而言，若藉由包含紅色螢光體由Sn2+、Pr3+、 Eu2+、Eu3 +所選擇、綠色螢光體由Eu2十、Ce3+、Tb3 +所選 擇、藍色螢光體由Eu2 +所選擇之活化劑的3波長螢光體來 構成燈的話，可重現上述效果。 在上述實施形態，使用閃爍點燈方式作爲背光裝置之 點燈方法，但本發明亦可有效地適用於掃描點燈方式之背 光裝置。 圖1 〇是用來說明關於掃描點燈方式之背光裝置的圖 。在此背光裝置，在1 2支的燈中，以2支爲一組，構成6 個燈群，並且，對各燈群輸入各偏移1 /6時間之開關（ ΟΝ/OFF)訊號，進行掃描點燈。該開關訊號是頻率=60Hz 、負載比=5 0%，藉由PWM方式產生。在此掃描點燈方式 ，除了在點燈狀態，燈群的其中一個或複數個常時開（ ON )的這一點與閃燦點燈方式不同以外，與上述同樣地 -14- 200822171 ，可達到高輝度、殘影少之背光裝置。 (第2實施形態） 圖1 1是用來說明使用本發明的螢光燈之液晶顯示裝 置的實施形態之圖。 液晶顯示裝置是藉由前盒FC與後盒BC來構成框體 。在前盒FC的開口面配設有液晶面板LCP。後盒BC爲 有底開口形狀，在其內部配設有背光裝置BL。 在液晶顯示裝置之情況，可組合背光裝置BL的閃燦 點燈與液晶面板LCP的開閉之動作。圖1 2是用來說明使 背光裝置BL的燈進行閃燦點燈時的發光特性之圖。同圖 的橫軸顯示時間，縱軸顯示電壓或電流値。又，同圖的波 形（A )爲用來對螢光燈進行開、關控制之電壓波形的開 關訊號，波形（B )爲燈電壓波形，波形（C )爲燈電流波 形，波形（D )爲藉由發光二極體將燈的發光強度進行光 電變換所獲得之輸出電壓波形。又，波形（E )爲用來開 閉形成液晶面板LCP的液晶之訊號，波形（F )爲在液晶 面板LCP所獲得之發光波形，波形（G )爲在液晶面板 LCP所無法獲得之波形。 如圖12所示，由於對背光裝置BL輸入關（OFF )訊 號的同時，關閉液晶面板LCP的話，可除去燈之殘光，故 ，藉由兩者的組合，可完全地防止動作模糊產生。但由於 所除去之光無法作爲液晶的光來利用，故，該部分會使輝 度降低。例如，在比較例1，輝度降低大約3 0%。關於這 -15- 200822171 一點，若爲使用本發明的螢光燈之背光裝置的話，由於燈 的應對速度快，被除去的光少，因此可達到高輝度。 因此，在第2實施形態，能夠達到在閃爍點燈也高輝 度、殘光少之液晶顯示裝置。 【圖式簡單說明】 圖1是用來說明關於本發明的第1實施形態（ embodiment)之背光裝置的圖。 圖2是用來說明圖1所示的螢光燈之剖面的圖。 圖3是用來說明塗佈Y2 03: Ειι3 +的螢光體之螢光燈 的發光特性之圖。 圖4是用來說明當利用應對速度不同的螢光燈，投影 液晶上的動畫時有無殘影之圖。 圖5是用來說明關於藉由閃爍點燈來將實施例（ Example )的燈進行閃爍點燈時的發光特性之圖。 圖6是用來說明關於藉由閃爍點燈來將比較例（ Comparison Example)的燈進行閃爍點燈時的發光特性之 圖。 圖7是用來說明實施例1與比較例1之差異的圖。 圖8是用來說明關欲使用各種螢光體時的螢光燈之應 對速度的圖。 圖9是用來說明關於當組合圖8的螢光體時的螢光燈 之應對速度的圖。 圖1 〇是用來說明關於本發明的第2實施形態之背光 -16- 200822171 裝置的圖。 圖1 1是用來說明關於本發明的第3實施形態之液晶 顯示裝置的圖。 圖1 2是用來說明關於以本發明的液晶顯示裝置所獲 得之發光的圖。 【主要元件符號說明】 la :前框架 1 b :後框架 2 :螢光燈 2 1 :玻璃容器 22a，22b:電極底座 22al，22bl :電極 22a2,22b2 :玻璃珠 23 :螢光體 3 ·_擴散板 4 :光學薄片 5 :點燈電路 B :藍色螢光體 BC :後盒 BL :背光裝置 F C :前盒 G :綠色螢光體 LCP :液晶面板 -17- 200822171 R :紅色螢光體 -18BaMg2Ali〇Oj7 : Eu2+ ( B) Diffusion plate: Transmittance = 60% Optical sheet 4: Diffusion sheet, 稜鏡 sheet lighting circuit 5 : PWM circuit, frequency = 50 Hz, duty ratio = 50% (Comparative example 1) Fluorescence Body 23: Y2 03 : Eu3+ ( R ) , LaP04 : Ce3+, Tb3 + (G) , BaMg2Al10O17: Eu2+ (B) The same structure as in Example 1 except for the phosphor 23. Fig. 5 is a view for explaining the light-emitting characteristics when the lamp -10- 200822171 of the first embodiment is flash-lighted by flashing lighting. Fig. 6 is a view for explaining the light-emitting characteristics when the lamp of Comparative Example 1 is flash-lighted by a flashing light. In these figures, the horizontal axis shows time and the vertical axis shows voltage or current 値. The waveform (A) is a switching signal for a voltage waveform for turning on and off the fluorescent lamp, the waveform (B) is a lamp voltage waveform, the waveform (C) is a lamp current waveform, and the waveform (D) is by a light emitting two. The output voltage waveform obtained by photoelectric conversion of the luminous intensity of the lamp. When comparing the waveforms of Figs. 5 and 6, it can be seen that the response speed of the lamp of the comparative example 1' embodiment is faster. Specifically, the 1/10 afterglow time of Example 1 is about 3 m s e c, and the comparative example is about 7 m s e c. In Embodiment 1, the lamp can be turned off relatively quickly. Further, regarding the 90% luminescence rise time, Example 1 was about 3 msec (less than 3 msec), and Comparative Example 1 was about 8 m s e c. Further, when the respective lamps were mounted on the liquid crystal display device and the animation was projected, it was found at a glance that the residual image was hardly left in the first embodiment, but the residual image remained in the comparative example 1, and the animation was blurred. Further, in order to further eliminate the image sticking, the liquid crystal is turned off at the time when the lamp is turned off (OFF), that is, only in the state of the luminance obtained during the period in which the lamp is off, the two are compared. Brightness. As a result, the luminance of both of the light beams of the lamp when the duty ratio was 100% was about 9.5 % in Example 1, and about 70% in the comparative example. That is, the liquid crystal display device of Example 1 was clearly perceived to be bright. The reason for the formation of such a result is presumed as follows: The difference between the first embodiment and the comparative example 1 is as shown in Fig. 7, and only the green phosphor having a different speed is used in the use of the opening and closing signals. However, as shown in Fig. 6, it can be seen that when it is used as a three-wavelength phosphor, a large difference occurs in the light rise and residual light of the lamp -11 - 200822171. Therefore, it is presumed that if the fluorescent lamp 2 coated with the three-wavelength phosphor is used to perform the flashing light R (red), G (green), or blue (B), the speed of any of the phosphors is slow. The response speed of the light is slow. Therefore, a three-wave experiment in which various phosphors were combined was formed in the lamp, and it was confirmed that among all the phosphors, the slow phosphor determines the response speed of the three-wavelength phosphor. Because the 3-wavelength fluorescent lamp for lighting needs to be combined with all the fastest RGB phosphors. In addition, even in a multi-wavelength phosphor in which a phosphor such as blue or magenta is mixed or a multi-wavelength phosphor in which a phosphor is mixed, it is possible to achieve a fast response to light emission in all phosphors. Fluorescent light. Here, the inventors further investigated the fact that the phosphor is mainly related to the activator of the phosphor. That is, the fluorescein is represented by Y2 03 : Eu3 + , and generally Y 2 03 is referred to as a precursor, an activator, and as shown in Fig. 8, the accelerator is a speed-up agent. Therefore, when an activator focusing on a phosphor is subjected to experiments to form a phosphor composed of a Sn2+, Pr3+, Eu2+, Eu3+, Ce3+, and Tb3+ neutralizing agent, it is easy to achieve a 5 msec J afterglow time. Among them, since the activator of Eu 3 + or T b3 + is several msec, there is also a phosphor which has a ratio of 1/1 to more than 5 msec due to the combination with the matrix. Therefore, the phosphors having a residual light time of 5 msec or less are suitable for the activator of the scintillation points Sn2+, pr3+, Eu2+, and Ce3+, and 90% of the light is emitted. In the case of use, if it is long, it should be fluorescent. The body response speed is the most, in response to the speed of the red, green, more than the speed of the response speed of the composition of the light body Eu3 + is said to be dependent on the live, if selected 1 / 1 0 below the live response speed, afterglow time, only 1 / 1 0 lights. In addition, the rise time, -12-200822171 1 /1 〇 afterglow time is about 0 · 1 m s e c, the opening and closing signal, the phosphor is almost no delay, so it is especially suitable for flashing lighting purposes. Incidentally, in the case where a plurality of activators are used, the characteristics of the slowest activator in a plurality of activators can be obtained as the response speed of the phosphor. For example, in the case of LaP04: Ce3 + and Tb3 + of the green phosphor of Comparative Example 1, although Ce3+ which is fast in response speed is included, it is a response speed of Tb3 + which is slower than the speed. That is, in the case where a plurality of activators are present, when one of them is an activator which is slow in response, it is not ideally applicable as a phosphor for flashing lighting. Further, since the activator changes the characteristics of the phosphor due to the type and the valence, there is an activator which can be used and an activator which cannot be used for each desired luminescent color. In the case of the above-mentioned activators of Sn2+, Pr3+, Eu2+, Eu3+, Ce3+, and Tb3+, Sn2+, Pr3+, Eu2+, and Eu3+ can be used for the red phosphor, and Eu2+ and Ce3+ can be used for the green phosphor. Tb3+, Eu2+ are used in blue phosphors. Next, as shown in Fig. 9, an experiment was conducted to cope with the speed by using a three-wavelength fluorescent lamp of various RGB phosphors. As a result, 90% of the luminescence rise time, Examples 2, 3, and 5 were approximately 3 msec, Example 4 was lmsec or less, and Comparative Examples 2 and 3 were 10 msec or more. Further, in the 1/10 afterglow time, Examples 2, 3, and 5 were approximately 3 msec, Example 4 was lmsec or less, Comparative Example 2 was approximately 6 msec, and Comparative Example 3 was 10 msec or more. From the above, it can be confirmed that, in order to cope with the combination of the phosphors having a high speed, the combination can be applied to the backlight device of the flashing lighting method in a fast response speed. Further, the fluorescent lamp of the present invention is also extremely effective for dimming by the PWM method. That is, the dimming is mainly performed for the purpose of adjusting the contrast, and as a result, the effect that the residual image does not easily remain can be obtained. Therefore, in the first embodiment, by using a fluorescent lamp 'applied to the inner surface of the glass container 21 with an RGB phosphor 23 having a 1/10 afterglow time of 5 msec or less, flickering can be performed, and it is possible to provide image sticking. Residual backlight unit. Further, in such a phosphor, almost 90% of the light emission rise time is 5 msec or less. Therefore, when the lamp and the liquid crystal switch (ΟΝ/OFF) are synchronized to form a liquid crystal display device, the luminance loss of the lamp is small and can be achieved. High brightness. Specifically, if the red phosphor is included, it is selected by Sn2+, Pr3+, Eu2+, and Eu3+, the green phosphor is selected by Eu2, Ce3+, and Tb3+, and the blue phosphor is selected by Eu2+. When the three-wavelength phosphor of the activator constitutes a lamp, the above effects can be reproduced. In the above embodiment, the flashing lighting method is used as the lighting method of the backlight device, but the present invention can also be effectively applied to the backlighting device of the scanning lighting method. Fig. 1 is a diagram for explaining a backlight device for scanning a lighting method. In the backlight device, six lamps are grouped into two groups, and six lamp groups are formed, and a switch (ΟΝ/OFF) signal of each offset time of 1 / 6 is input to each lamp group. Scan the lights. The switching signal is frequency=60Hz, load ratio=50%, and is generated by PWM method. In this scanning mode, except that in the lighting state, one of the lamp groups or a plurality of constant ON (ON) is different from the flashing lighting mode, the same as the above -14-200822171 can be achieved. A backlight with less brightness and residual image. (Second Embodiment) Fig. 11 is a view for explaining an embodiment of a liquid crystal display device using a fluorescent lamp of the present invention. The liquid crystal display device is constituted by a front case FC and a rear case BC. A liquid crystal panel LCP is disposed on the opening surface of the front case FC. The rear case BC has a bottomed opening shape in which a backlight BL is disposed. In the case of a liquid crystal display device, the operation of opening and closing the flashing light of the backlight device BL and the liquid crystal panel LCP can be combined. Fig. 1 is a view for explaining the light-emitting characteristics when the lamp of the backlight device BL is flashed. The horizontal axis of the same graph shows the time, and the vertical axis shows the voltage or current 値. Moreover, the waveform (A) in the same figure is a switching signal for a voltage waveform for turning on and off the fluorescent lamp, the waveform (B) is a lamp voltage waveform, the waveform (C) is a lamp current waveform, and the waveform (D) The output voltage waveform obtained by photoelectrically converting the luminous intensity of the lamp by the light-emitting diode. Further, the waveform (E) is a signal for opening and closing the liquid crystal forming the liquid crystal panel LCP, the waveform (F) is an emission waveform obtained by the liquid crystal panel LCP, and the waveform (G) is a waveform which cannot be obtained by the liquid crystal panel LCP. As shown in Fig. 12, since the OFF panel is turned on and the liquid crystal panel LCP is turned off, the residual light of the lamp can be removed. Therefore, the combination of the two can completely prevent the occurrence of motion blur. However, since the removed light cannot be utilized as light of the liquid crystal, this portion causes a decrease in luminance. For example, in Comparative Example 1, the luminance is reduced by about 30%. In the case of the backlight device using the fluorescent lamp of the present invention, since the light-receiving speed of the lamp is fast, the amount of light to be removed is small, so that high luminance can be achieved. Therefore, in the second embodiment, it is possible to achieve a liquid crystal display device which has high luminance and low residual light when blinking. BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a view for explaining a backlight device according to a first embodiment of the present invention. Fig. 2 is a view for explaining a cross section of the fluorescent lamp shown in Fig. 1; Fig. 3 is a view for explaining the light-emitting characteristics of a fluorescent lamp coated with a phosphor of Y2 03: Ειι3 + . Fig. 4 is a view for explaining whether or not there is a residual image when an animation on a liquid crystal is projected by using a fluorescent lamp having a different response speed. Fig. 5 is a view for explaining the light-emitting characteristics when the lamp of the embodiment is flash-lighted by flashing lighting. Fig. 6 is a view for explaining a light-emitting characteristic when a lamp of a comparative example is flash-lighted by flashing lighting. Fig. 7 is a view for explaining the difference between the first embodiment and the comparative example 1. Fig. 8 is a view for explaining the response speed of the fluorescent lamp when various phosphors are to be used. Fig. 9 is a view for explaining the speed of response of the fluorescent lamp when the phosphor of Fig. 8 is combined. Fig. 1 is a view for explaining a backlight-16-200822171 device according to a second embodiment of the present invention. Fig. 11 is a view for explaining a liquid crystal display device according to a third embodiment of the present invention. Fig. 12 is a view for explaining the light emission obtained by the liquid crystal display device of the present invention. [Description of main component symbols] la : Front frame 1 b : Rear frame 2 : Fluorescent lamp 2 1 : Glass container 22a, 22b: Electrode base 22al, 22bl: Electrode 22a2, 22b2: Glass bead 23: Phosphor 3 · _ Diffuser 4: Optical sheet 5: Lighting circuit B: Blue phosphor BC: Back box BL: Backlight FC: Front box G: Green phosphor LCP: Liquid crystal panel-17- 200822171 R: Red phosphor -18