2012/2/23 九、發明說明： 【發明所屬之技術領域】 特別是有關於 -種二:; 【先前技術】 其以顯ΐ器大量地被應用在曰常生活中，尤 須藉助背光模_提供之光源才能達到顯示的 C月= 乍陰極榮光燈(c〇ld cathode fluQrescent 1 卿， Μ #絲組之發光n種常見的背光触之發光源為 發光二極體(Light Emitting Diodes，LED)_。其巾，#光-極 體陣列較冷陰極螢光燈優異之處如下： T H極 1. 反應速度快； 2. 壽命較長； 3.不需高壓點燈； 4·不含汞，無環境污染之疑慮；以及 5·色彩範圍較廣。 因此’雖然許多廠商致力於研發含汞量低及色彩範圍寬廣之CCFL， 而LED的反應速度較快仍是CCpi所望塵莫及之優點。 現今較為新穎的兩種顯示技術，一為區域控制法(Area c〇ntr〇l or Regional Control)，二為色序法（Color Sequential Display, CSD)。但是上述兩種技術均需搭配反應速度較快之背光源，因此使用 LED作為背光源已是未來發展之趨勢。以下分別簡介上述兩種顯示技 1364733 2012/2/23 術 1區域控制法： 在傳統的顯示技術中，背光燈的亮度均一致，因此晝面亮暗的程 度取決於液晶分子之旋轉角度所控制的透光度。而區域控制法是將晝 面切割為數個區域，並依照其各自的亮暗程度改變背光燈之亮度，此 舉可^幅提升液晶面板之亮暗對比，且同時降低背光燈所消耗之功 率。$採用區域控制法時’背光燈之響應速度必須儘可能的快速以縮- 短暫態時間’進而增加統控制之準確度，因此需要使用反應速度較 快之LED以作為背光模組。 2.色序法： …在傳統的LCD顯示技術中，背光燈所提供之白光經由彩色濾光片 還工、、綠、藍二原光。彩色遽光片的成本約佔背光模組的20%， 但八光利用率(Light Utilization Efficiency，LUE)約只有 37%。因 此’使用其他方法取代彩色遽光片可以大幅降低LCD之成本與功率損 耗。在色序法顯示技術中，紅、綠、藍三色背光燈依序發光了且快速 ，轉換以_加法混色原理來提供任意有色光，因此不需要彩色遽光 述作法的先決條件是’紅、綠、藍三色背光燈必須具ί快 速轉換的能力，因此仙反應速度較快之⑽也是必然之趨勢。、 之Ϊ光燈進行區域控制法時，首先需要個別控制各區域 對岸草^ I。取直接的方法就是增加驅動器的數量，一驅動器 :-圖、之體積、重量及成本。請參照第-圖， iin °之白光㈣陣列輯控制系統電路圖，其包含一個橋式 整㈣110、一個具功率因素修正功能之直流/直流轉換考m 個直流/直流轉換^! 13()$ 一㈣_ η’㈣換$ 120、一 餐态id〇及-負載2〇〇。其中’該負載為 6 1364733 2012/2/23 區210、B區220、C區230與D區240的LE：D模組，且各LED串列皆 各自搞接至-具開關功能之穩流電路。其中，具開關功能之穩流電路 SA~SD有多種實現方式，諸如：具有電流鏡之穩流IC、開關元件串聯 線性穩流器及將開關元件操作在線性區等。第一圖之⑽冑光燈 系統採用脈波寬度調變(Burst Mode，BM)控制，藉由改變⑽之導通 〇 5 仏L電路SA〜SD之導通貝任比，即可分別控制各區led的亮产。 :斤Γφ第广「圖是習知之白光陣列區域控‘统： 動電流波形圖。其中，Α區則的LED之導通時間為2/侧，Β區咖 η的之導通時間為4/4麵，C區230的之導通時間為·ΒΜ， 區240的LED之導通時間為1/4醜，因此各區L 小關係為B區〉C區〉A g>D區。 度之大 雨斤示為習知之色序®陣列區域_、統 ^路，其與第—圖所不之白光㈣背光舰域控偷_系統大致相 ：不同處在於各區背光燈均具備紅、綠、藍光⑽陣列各 因此該負載200可劃分為A區25〇、B區26〇、c區與〇區 ^、綠、藍光LED陣列模組。請參照第四圖 示習辛 系統之駆動電流波形圖，前1/3以= ^、、工先LED導通’往後則由綠光LED和藍光⑽ 色之led背光燈又各自區分成四區，且每—種種顏 作原理與上勒光LED背絲的動作雜相/ ^ 肖光燈的動 因此必須儘可能的降低輸出電容。。的 方面，2 ^ 換至三種顏色之LED的驅動電壓。另一 免過；故㈣，較小繼電容co能避 夕⑽里灌人LED陣列之中，因而達到短路保護之功效。 7 1364733 齡丨遇朗尹，總負載電流i〇只會降彻而π在 較小之輸出電容C〇在負载下降 ^降^而不會升局，2012/2/23 IX. Description of the invention: [Technical field to which the invention pertains] In particular, there is a second type of technology: [Prior Art] It is widely used in ordinary life with a display device, especially by means of a backlight module. _The light source provided can reach the C month of the display = 乍 cathode glory lamp (c〇ld cathode fluQrescent 1 qing, Μ #丝组之光 n kinds of common backlight contact light source is Light Emitting Diodes (LED) _. Its towel, #光-polar array is better than cold cathode fluorescent lamp as follows: TH pole 1. fast reaction speed; 2. long life; 3. no need for high voltage lighting; 4 · no mercury There is no doubt about environmental pollution; and 5. The color range is wide. Therefore, although many manufacturers are committed to the development of CCFLs with low mercury content and wide color range, the faster response of LEDs is still the advantage that CCpi is unable to achieve. Two new display technologies, one is Area Control (Area c〇ntr〇l or Regional Control), and the other is Color Sequential Display (CSD). However, both technologies need to match the response speed. Backlight, so use LED As a backlight, it has become a trend in the future. The following two types of display technologies are respectively introduced. 1364733 2012/2/23 Area 1 control method: In the traditional display technology, the brightness of the backlight is uniform, so the surface is bright and dark. The degree depends on the transmittance controlled by the rotation angle of the liquid crystal molecules. The area control method is to cut the surface into several regions and change the brightness of the backlight according to their respective brightness and darkness. Bright and dark contrast, and at the same time reduce the power consumed by the backlight. When using the area control method, 'the response speed of the backlight must be as fast as possible - the transient state of time' and thus increase the accuracy of the control, so it is necessary The LED with fast response speed is used as the backlight module. 2. Color sequence method: ... In the traditional LCD display technology, the white light provided by the backlight is returned through the color filter, green, and blue. The cost of color enamel film accounts for about 20% of the backlight module, but the Light Utilization Efficiency (LUE) is only about 37%. Therefore, 'other methods can be used instead of color enamel film. The cost and power loss of the LCD are greatly reduced. In the color sequential display technology, the red, green and blue backlights are sequentially illuminated and fast, and the conversion is based on the principle of _additive color mixing to provide any colored light, so no color 不需要 is needed. The prerequisite for the optical method is that the red, green and blue backlights must have the ability to quickly convert, so the faster reaction speed (10) is also an inevitable trend. When the light is used for the regional control method, first Individual control of each side of the grass is required. The direct method is to increase the number of drives, a drive: - map, volume, weight and cost. Please refer to the figure - iin ° white light (four) array control system circuit diagram, which includes a bridge type (four) 110, a DC / DC conversion with power factor correction function m DC / DC conversion ^! 13 () $ a (4) _ η' (four) for $ 120, a meal state id 〇 and - load 2 〇〇. Among them, the load is the LE:D module of Zone 1 210, 2012/2/23 Zone 210, Zone B 220, Zone C 230 and Zone D 240, and each LED string is connected to the steady flow of the switch function. Circuit. Among them, the steady-current circuit SA~SD with switching function can be implemented in various ways, such as: a constant current IC with a current mirror, a linear current regulator with a switching element, and a switching element operating in a linear region. In the first picture (10), the xenon lamp system adopts the pulse width modulation (Burst Mode, BM) control. By changing the conduction 〇5 仏L circuit SA to SD of the (10) conduction, the ratio of each can be controlled. Bright production. : Γ Γ φ 广 " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " The conduction time of the C area 230 is · ΒΜ, and the conduction time of the LED of the area 240 is 1/4 ugly, so the relationship between the small areas of each area L is B area > C area > A g > D area. The heavy rain is indicated as The conventional color sequence® array area _, the system ^ road, and the white light of the first picture (four) backlight ship control stealing _ system is roughly the same: the difference is that each area backlights are equipped with red, green, blue (10) arrays Therefore, the load 200 can be divided into A zone 25 〇, B zone 26 〇, c zone and ^ zone ^, green, blue LED array module. Please refer to the fourth graphic Xixin system turbulent current waveform diagram, the first 1 / 3 to = ^,, the first LED is turned on', then the green LED and blue (10) color led backlights are divided into four zones, and each of the various principles of the film and the Lelai LED back wire action Phase / ^ The operation of the Xiaoguang lamp must therefore reduce the output capacitance as much as possible. In terms of 2^, switch to the driving voltage of the LEDs of the three colors. Another exemption; (4), the smaller relay capacitor can be used to immerse the LED array in the eve (10), thus achieving the short-circuit protection effect. 7 1364733 Ageing encounter Lang Yin, the total load current i〇 will only be reduced and π is smaller The output capacitor C 〇 drops in the load ^ drop ^ will not rise,
Vo，因而當輸出電塵Vq因時時，穩定輸出電塵 隨之上升。此現象將嚴:導致⑽之亮度亦 及可靠度。 祕之綠麵度，且減少LED的壽命 人基於多年題’為了能夠兼顧解決之，本發明 回收電路，以务經驗，提出一種電顯制與能量1 作為改善上述缺點之實現方式與依據。 【發明内容】 收^鑑n!㈣之目的就是在提供—種__能 回 县 以穩定LED之驅動電壓且收電壓突 = ㈣、-校正電路、一直流轉換器與若干個負載單元。 直流將其轉換成—直流電源。 中，亩泣二電路後形成一杈直流電源並輸入直流轉換器 後於^自/將校正直流電源的第—電壓轉換為第二電壓，然 谅载，多個負載單元所組成，且分別連接到直 二二1Γ—負載単元皆電性連接到—控制開關，並藉由控制 開關決疋此負载為通路或斷路。 外上述之電壓籍制與能量回11欠電路的輸入端連接到直流 之輸^端，且其輸出端連接到直流轉換n之輸人端。電壓 ϋ制與能量回收電路將賊上所形成的電歡波導引到直流轉換 益，以達到電壓箝制與能量回收之目的。 8 1364733 2012/2/23Vo, so when the output of the electric dust Vq changes, the stable output electric dust rises. This phenomenon will be severe: resulting in (10) brightness and reliability. The greenness of the secret, and the reduction of the life of the LED. Based on the multi-year problem, in order to be able to solve the problem, the recycling circuit of the present invention has proposed an electric display and energy 1 as an implementation and basis for improving the above disadvantages. SUMMARY OF THE INVENTION The purpose of receiving the n! (4) is to provide a kind of __ energy back to the county to stabilize the driving voltage of the LED and receive the voltage suddenly = (four), - correction circuit, DC converter and several load cells. DC converts it to a DC power supply. In the middle of the circuit, after forming a DC power supply and inputting the DC converter, the first voltage of the corrected DC power supply is converted into the second voltage. To the straight two-two Γ - the load unit is electrically connected to the - control switch, and by the control switch to determine the load as a path or open circuit. The input terminal of the above-mentioned voltage system and energy return 11 circuit is connected to the input end of the direct current, and the output end thereof is connected to the input end of the direct current conversion n. The voltage clamp and energy recovery circuit directs the electric waves formed by the thief to the DC conversion to achieve voltage clamping and energy recovery. 8 1364733 2012/2/23
承上所述，採用本發明之電壓箝制與能量回收電路 驅動系統’具有以下優點： J (1) 大幅提升系統之效率與可靠度； (2) 大幅提昇面板之亮暗對比；以及 (3) 降低背光燈之消耗功率。 兹為使貴審查委員對本發明之技術特徵及所達到之功效右 :步之瞭解與認識’謹佐以較佳之實施例及配^= 【實施方式】 旦以下將參照相_式’說本發雜佳實麵之電壓箱制盘 使便於理解，下述實施例中之_元件係以_ 量 =提供-輸出電壓至負载·，當負載下降時電= 3θ〇〇ίί升而產生—電壓突波。此時，電壓卿與能量回收電路 而圍内，因 所吸收之能㈣麵 回收六圖係為本發明之電壓箝制與能量 電路咖與負載之工作原理與結構，為本^領 9 1364733 s電/原轉換器310、一二極體m與一輸入雷宏哭川甘山+ Γ；；!ΓΛ^ 電谷态ci之電谷值大於電容器c^ ^ =，設之保護_ VC1時， 二容入=器ί1: ’因而使輸出繼。下降•:說 a α透過二極㈣吸收輸出電壓ν〇 將輸出電屢ν〇箝制在預設之保護電 ^因而 純於預設之保護電壓值να時麵 量輸入電源轉換器310，電源轉換考31〇爯拉八斤儲存之旎 直流獅饋入 A多個例之負載端2G°，於本發明另—實施例中，亦可擴展 Γ在ί::ί:圖如第七圖所示，且操作原理與上述實施』 舰參考第人圖，“_為本發明-實施例以返馳式 魏編齡细爾之電關。其巾，t源轉換$ 之功直流轉換器。由於電轉換1131G所處理 不冋’因此採用返驰式直流/直流轉換器可為一基於成 當LED動電壓V〇超過預設之保護電壓值VC1時， I·、二P帛始切換，將多餘的能量回收至直流電壓端VDC，使 率==^之輸_vo降回正常狀態’達到電壓籍制與欵 最後，請再參考第九圖，第九圖係為本發明一實施例以順向式 ±± „〇 ^ 2012/2/23 轉換盗實現f壓_魏量回㈣路之fAs described above, the voltage clamping and energy recovery circuit driving system of the present invention has the following advantages: J (1) greatly improves the efficiency and reliability of the system; (2) greatly improves the brightness contrast of the panel; and (3) Reduce the power consumption of the backlight. In order to enable the reviewing committee to understand the technical features of the present invention and the effects achieved by the right: understanding and understanding of the steps, please refer to the preferred embodiment and the matching method. [Embodiment] The well-stacked voltage box is easy to understand. In the following embodiments, the components are supplied with _ quantity = output voltage to the load. When the load drops, the voltage is 3 θ 〇〇 ίίί wave. At this time, the voltage and the energy recovery circuit are enclosed, because the absorbed energy (four) surface recovery is the working principle and structure of the voltage clamping and energy circuit coffee and load of the invention, which is the power of 9 1364733 s /Original converter 310, a diode m and an input Lei Hong crying Ganshan + Γ;;! ΓΛ ^ electric valley state ci electric valley value is greater than the capacitor c ^ ^ =, set protection _ VC1, two容 = ί1: 'There is the output followed. Decrease:: a α is transmitted through the diode (4) to absorb the output voltage ν〇, and the output voltage is clamped to the preset protection voltage. Therefore, it is pure to the preset protection voltage value να. In the other part of the present invention, the DC lion can also be expanded in the ί:: ί: And the operation principle and the above implementation 』 ship reference person map, "_ for the invention - the embodiment to the flyback type Wei dynasty fine electric switch. Its towel, t source conversion $ work DC converter. Because of electricity The conversion 1131G is not processed. Therefore, the flyback DC/DC converter can be used when the LED dynamic voltage V〇 exceeds the preset protection voltage value VC1, and the I· and P are switched. The energy is recovered to the DC voltage terminal VDC, so that the rate ==^ loss _vo is returned to the normal state 'to reach the voltage system and 欵 finally, please refer to the ninth figure, the ninth figure is an embodiment of the present invention in the forward direction ±± „〇^ 2012/2/23 conversion thief to achieve f pressure _ Wei volume back (four) road f
路之可靠度與穩纽’本實施例採用順向 ^ J 310。當負載驅動糖。超過預設之保護電壓值電=換: S1開始切換，將多餘的能量回收至直 C1時開，疋件 出電壓V_正常狀態，_電壓“_提=^奐器之輪 任何未脫離本發明之 均應包含於後附之申 以上所述僅為舉例性，而非為限制性者 精神與範疇’而對其進行之等效修改或變更 請專利範圍中。 【圖式簡單說明】 第1圖係為習知之白光LED陣列區域控制系統電路圖； 第2圖係為習知之白光LED陣列區域控制系統之驅動電流波形 Γ5Γ1 · 圚， 第3圖係為習知之色序LED陣列區域控制系統電路圖； 第4圖係為習知之色序LED _區域控制系統之驅動電流波形 園， 第5圖係為採用本發明之電壓箝制與能量回收電路之LE：D陣列驅 動系統之功能方塊圖； 第6圖係為本發明之電壓箝制與能量回收電路之一色序led陣列 區域控制糸統電路圖； 第7圖係為本發明之電壓箝制與能量回收電路之另一色序led 陣列區域控制系統電路圖； 第8圖係為本發明一實施例以返馳式轉換器實現電壓箝制與能 量回收電路之電路圖；以及 第9圖係為本發明另一實施例以順向式轉換器實現電壓箝制與 能量回收電路之電路圖。 1364733 2012/2/23 【主要元件符號說明】 100 :電源供應電路； 110 :整流器； 120 :校正電路； 130 :直流轉換器； 200 :負載； 210 :白光LED負載A區； 220 :白光LED負載B區； 230 :白光LED負載C區； 240 :白光LED負載D區； 250 :紅、綠、藍LED負載A區； 260 :紅、綠、藍LED負載B區； 270 :紅、綠、藍LED負載C區； 280 :紅、綠、藍LED負載D區； 300 :電壓箝制與能量回收電路；以及 310 :電源轉換器。 12Reliability and stability of the road' This embodiment uses the forward direction ^ J 310. When the load drives the sugar. Exceeding the preset protection voltage value ==: S1 starts to switch, the excess energy is recovered to the straight C1 when it is turned on, and the output voltage V_ is normal, _voltage "_提=^奂器轮的轮不出本本The invention is to be construed as being limited to the scope of the invention, and is not to be construed as a limitation. 1 is a circuit diagram of a conventional white LED array control system; Fig. 2 is a driving current waveform of a conventional white LED array control system Γ5Γ1 · 圚, Fig. 3 is a circuit diagram of a conventional color sequential LED array area control system Figure 4 is a schematic diagram of a driving current waveform of a conventional color sequential LED _ area control system, and Fig. 5 is a functional block diagram of an LE:D array driving system using the voltage clamping and energy recovery circuit of the present invention; The figure is a circuit diagram of a color-sequence led array region control system of the voltage clamping and energy recovery circuit of the present invention; FIG. 7 is another color-sequence led array area control of the voltage clamping and energy recovery circuit of the present invention. FIG. 8 is a circuit diagram of a voltage clamping and energy recovery circuit implemented by a flyback converter according to an embodiment of the present invention; and FIG. 9 is another embodiment of the present invention for implementing a voltage by a forward converter Circuit diagram of the clamp and energy recovery circuit 1364733 2012/2/23 [Key component symbol description] 100: power supply circuit; 110: rectifier; 120: correction circuit; 130: DC converter; 200: load; 210: white LED load Area A; 220: White LED load B area; 230: White LED load C area; 240: White LED load D area; 250: Red, green, and blue LED load A area; 260: Red, green, and blue LED load B area 270: Red, green, and blue LED load C area; 280: Red, green, and blue LED load D area; 300: voltage clamp and energy recovery circuit; and 310: power converter.