TWI517760B - Lamp brightness adjusted circuit - Google Patents
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Description
本發明係相關於螢光燈驅動電路,尤其為一種用於可調光螢光燈之驅動及控制電路。 The invention relates to a fluorescent lamp driving circuit, and more particularly to a driving and control circuit for a dimmable fluorescent lamp.
傳統的照光設備如燈泡或燈管等電燈,在被點亮的時候都只能提供固定亮度的光源,對於在特定時候不需要太高亮度的環境而言,電燈提供過多的亮度不但會造成電能的浪費,並且電燈不能配合環境需求來改變亮度,達到最適宜的電燈亮度。 Conventional lighting equipment, such as light bulbs or lamps, can only provide a fixed-light source when illuminated. For environments that do not require too much brightness at a particular time, the lamp provides too much brightness and not only causes electrical energy. The waste, and the electric light can not change the brightness according to the environmental demand, to achieve the most suitable brightness of the electric light.
因此,一些所謂的節能燈或調光燈等等可調光式的電燈被發明出來,對於燈泡(白幟燈)而言,調光的原理即是藉由操控的旋鈕來改變電流流過鎢絲的大小,藉以改變燈泡的亮度,但對於螢光燈而言,因為螢光燈並非用鎢絲通過電流來發光,因此無法藉由與燈泡相同的方法來切換亮度,而習知的作法是透過開關的次數以切換不同的亮度。 Therefore, some so-called energy-saving lamps or dimming lamps and other dimmable electric lamps have been invented. For the bulb (white light), the principle of dimming is to change the current through the tungsten by the knob. The size of the wire, in order to change the brightness of the bulb, but for fluorescent lamps, because the fluorescent lamp does not use tungsten to emit light through the current, it is impossible to switch the brightness by the same method as the bulb, and the conventional method is Switch the different brightness by the number of times the switch is turned.
但透過開關的次數來改變螢光燈亮度會造成使用者的困擾,通常螢光燈的亮度改變是透過開關的次數進行次序性的改變,如第一次開燈是最亮亮的亮度,關上後立刻重開一次,會切換到中亮的亮度,再開關一次會切換到低亮的亮度,如果使用者一開始欲調整到低亮的亮度,則必須忍受開關兩次螢光燈的閃爍,以及亮度切換造成眼睛的負擔,此外前兩次的切換閃爍同時也造成了電能的浪費,更 會嚴重影響的燈管的壽命,即便是要調整到中亮度,也需要忍受一次的閃爍,這對使用者而言將會造成困擾,因此如何解決這樣的問題成為目前迫切需要解決的課題。 However, changing the brightness of the fluorescent lamp through the number of times of the switch may cause trouble to the user. Usually, the brightness of the fluorescent lamp changes sequentially through the number of times of the switch, for example, the first time the light is turned on is the brightest brightness, and the light is turned off. Immediately after re-opening once, it will switch to the brightness of the medium bright. Switching once will switch to the low brightness. If the user wants to adjust to the low brightness at the beginning, he must endure the flashing of the switch twice. And the brightness switching causes the burden on the eyes, in addition, the first two switching flashes also cause a waste of electrical energy, The life of the lamp that will be seriously affected, even if it is to adjust to the medium brightness, it needs to endure the flicker once, which will cause trouble for the user. Therefore, how to solve such a problem has become an urgent problem to be solved.
因此,本發明的目的之一,在於提供一種螢光燈驅動電路,其係用於點亮一螢光燈,該螢光燈驅動電路包含:一轉換部,用以將所接收的交流電源轉換為直流電;一控制部,根據偵測交流電壓的輸入輸出一控制訊號,用以控制輸出至該螢光燈之電流值;一輸出部耦接至該控制部以及該轉換部,用以根據該控制訊號輸出電流至該螢光燈,其中,該控制部包含一延遲單元,在點亮該螢光燈前提供一特定緩衝時間延緩點亮該螢光燈。 Therefore, one of the objects of the present invention is to provide a fluorescent lamp driving circuit for lighting a fluorescent lamp, the fluorescent lamp driving circuit comprising: a converting portion for converting the received alternating current power a control unit that outputs a control signal according to the input of the detected alternating voltage to control the current value outputted to the fluorescent lamp; an output unit is coupled to the control unit and the conversion unit for Controlling the signal output current to the fluorescent lamp, wherein the control portion includes a delay unit for providing a specific buffering time to delay the lighting of the fluorescent lamp before the fluorescent lamp is illuminated.
請參閱1圖,第1圖為本發明較佳實施例之螢光燈驅動電路電路圖,如第1圖所示,螢光燈驅動電路1包含交流電源AC input、轉換部11、控制部12、輸出部13以及螢光燈14。 1 is a circuit diagram of a fluorescent lamp driving circuit according to a preferred embodiment of the present invention. As shown in FIG. 1, the fluorescent lamp driving circuit 1 includes an AC power supply AC input, a conversion unit 11, and a control unit 12, The output unit 13 and the fluorescent lamp 14.
轉換部11接收來自交流電源AC input所提供的交流電壓,並將其轉換為直流電,其中轉換部11包含四個二極體,分別是第一二極體111、第二二極體112、第三二極體113以及第四二極體114,第一二極體111與第二二極體112相互耦接並串聯,而第三二極體113與第四二極體114相 互耦接並串聯,並且第一、第二二極體111、112和第三、第四二極體113、114則以並聯方式耦接,駛轉換部形成一個橋接式的電路。其中交流電源AC input的兩個輸入端分別耦接至第一二極體111與第二二極體112之間,和第三二極體113與第四二極體114之間,另外轉換部11包含一虛擬接地端15耦接至第二二極體112和第四二極體114。 The converting portion 11 receives the AC voltage supplied from the AC power source AC input and converts it into DC power, wherein the converting portion 11 includes four diodes, which are the first diode 111, the second diode 112, and the first The third diode 113 and the fourth diode 114, the first diode 111 and the second diode 112 are coupled to each other and connected in series, and the third diode 113 and the fourth diode 114 are The mutual coupling and the series connection, and the first and second diodes 111, 112 and the third and fourth diodes 113, 114 are coupled in parallel, and the driving conversion portion forms a bridge type circuit. The two input ends of the AC power source AC input are respectively coupled between the first diode 111 and the second diode 112, and between the third diode 113 and the fourth diode 114, and the conversion portion. 11 includes a virtual ground 15 coupled to the second diode 112 and the fourth diode 114.
控制部12耦接至交流電源AC input,可以偵測AC電壓輸入的狀況,並根據AC電壓輸入狀況控制輸出部13輸出到螢光燈之電流值,同時輸出控制訊號至輸出部13,並藉由控制訊號改變輸出部13輸出到螢光燈14之輸出電流。 The control unit 12 is coupled to the AC power input AC, and can detect the status of the AC voltage input, and control the current value outputted by the output unit 13 to the fluorescent lamp according to the AC voltage input condition, and simultaneously output the control signal to the output unit 13 and borrow The output current output from the control unit 13 to the fluorescent lamp 14 is changed by the control signal.
輸出部13耦接至控制部12以及轉換部11,同時接收來自轉換部11所輸出的直流電壓以及控制部12所輸出之控制訊號,並根據控制訊號輸出驅動電流至螢光燈14,以點亮螢光燈14。輸出部13包含第一N型金屬氧化半導體(NMOS)131和第二N型金屬氧化半導體132,第一NMOS131之汲極耦接至轉換部11,接受來自轉換部11所轉換後輸出的直流電壓,閘極耦接至控制端12接收控制訊號,第二NMOS132之汲極耦接至第一NMOS131之源極,閘極耦接至控制端12接收控制訊號,源極耦接至虛擬接地端15。輸出部13另外包含電感133及第一電容134,電感133之第一端耦接至第一NMOS131之源極與第二NMOS132之汲極之間,而第一電容134之第一端耦接至電感133之第二端,第一電容134之第二端則輸出一驅動電流至螢光燈14。 The output unit 13 is coupled to the control unit 12 and the conversion unit 11, and receives the DC voltage outputted from the conversion unit 11 and the control signal output by the control unit 12, and outputs a driving current to the fluorescent lamp 14 according to the control signal to point. Bright fluorescent light 14. The output portion 13 includes a first N-type metal oxide semiconductor (NMOS) 131 and a second N-type metal oxide semiconductor 132. The drain of the first NMOS 131 is coupled to the conversion portion 11 and receives the DC voltage outputted from the conversion portion 11. The gate is coupled to the control terminal 12 for receiving the control signal, the gate of the second NMOS 132 is coupled to the source of the first NMOS 131, the gate is coupled to the control terminal 12 for receiving the control signal, and the source is coupled to the virtual ground 15 . The output portion 13 further includes an inductor 133 and a first capacitor 134. The first end of the inductor 133 is coupled between the source of the first NMOS 131 and the drain of the second NMOS 132, and the first end of the first capacitor 134 is coupled to The second end of the inductor 133 outputs a driving current to the fluorescent lamp 14 at the second end of the first capacitor 134.
螢光燈14與輸出部13之間尚有第二電容141以及電阻142,第二電容141之第一端耦接至第一電容134之第二端和螢光燈14之第一端,電阻142之第一端耦接至螢光燈14之第二端,電阻142之第二端耦接至第二電容141之第二端、虛擬接地端15以及控制部12。 There is a second capacitor 141 and a resistor 142 between the fluorescent lamp 14 and the output portion 13. The first end of the second capacitor 141 is coupled to the second end of the first capacitor 134 and the first end of the fluorescent lamp 14. The first end of the 142 is coupled to the second end of the fluorescent lamp 14 , and the second end of the resistor 142 is coupled to the second end of the second capacitor 141 , the virtual ground 15 , and the control unit 12 .
螢光燈14接收來自輸出部13輸出之驅動電流來點亮,並回饋電壓至控制部12用以控制其輸出訊號。 The fluorescent lamp 14 receives the drive current from the output of the output unit 13 to illuminate, and feeds back the voltage to the control unit 12 for controlling the output signal.
請參閱2圖,第2圖為本發明較佳實施例之控制部電路方塊圖,如第2圖所示,控制部12包含電壓源21、備用電源22、電壓穩壓單元23、邏輯單元24、控制單元25、延遲單元27和偵測單元28。 2 is a block diagram of a control unit according to a preferred embodiment of the present invention. As shown in FIG. 2, the control unit 12 includes a voltage source 21, a backup power source 22, a voltage voltage stabilizing unit 23, and a logic unit 24. The control unit 25, the delay unit 27 and the detection unit 28.
電壓源21用以在螢光燈打開時提供足以點亮螢光燈的電壓,而備用電源22則在電壓源21不作用時,提供控制部12其他週邊元件所需要的電源。 The voltage source 21 is for providing a voltage sufficient to illuminate the fluorescent lamp when the fluorescent lamp is turned on, and the backup power source 22 supplies the power required by the other peripheral components of the control unit 12 when the voltage source 21 is inactive.
電壓穩壓單元23耦接至電壓源以及備用電源,接受來自電壓源提供的電壓,並且用於穩定整個系統的電壓,當電壓下降到一預設值以下時,電壓穩壓單元23會將電壓維持在預設值以上。 The voltage regulator unit 23 is coupled to the voltage source and the backup power source, receives the voltage supplied from the voltage source, and is used to stabilize the voltage of the entire system. When the voltage drops below a predetermined value, the voltage regulator unit 23 will apply the voltage. Maintain above the preset value.
邏輯單元24耦接至電壓穩壓單元23,可以根據電壓源提供電壓與否和偵測單元28來輸出邏輯訊號,藉由邏輯訊號控制延遲單元27的運作,並且根據延遲單元27回饋輸出的延遲訊號來輸出邏輯訊號至控制單元25。 The logic unit 24 is coupled to the voltage voltage stabilizing unit 23, and can provide a voltage signal according to the voltage source and the detecting unit 28 to output a logic signal, and the logic signal controls the operation of the delay unit 27, and the delay of the feedback output according to the delay unit 27 The signal outputs a logic signal to the control unit 25.
延遲單元27耦接至邏輯單元24,其中包含微電流源271、第一開關272、第二開關273、第三電容274以及第 一比較器275。微電流源271穩定的提供很小的電流,本實施例中較佳的數值為1u安培,但不以此為限,第一開關272耦接至微電流源271,第二開關271與第一開關272串聯並且耦接至虛擬接地端15,其中第一開關272與第二開關273之開啟或關閉受到邏輯單元24所輸出的邏輯訊號的控制,第三電容274之第一端耦接於第一開關272與第二開關273之間。 The delay unit 27 is coupled to the logic unit 24, and includes a micro current source 271, a first switch 272, a second switch 273, a third capacitor 274, and a A comparator 275. The micro current source 271 stably provides a small current. The preferred value in the embodiment is 1 u amp, but not limited thereto, the first switch 272 is coupled to the micro current source 271, and the second switch 271 is first. The switch 272 is connected in series and coupled to the virtual ground 15 . The opening or closing of the first switch 272 and the second switch 273 is controlled by the logic signal output by the logic unit 24 . The first end of the third capacitor 274 is coupled to the first end. A switch 272 is between the second switch 273.
當螢光燈14被操作需要點亮時,電壓源21會提供電壓,間接控制邏輯單元24輸出邏輯訊號,此時邏輯訊號會控制第一開關272關閉,並且打開第二開關273使其對虛擬接地端15造成斷路。因為第一開關272的關閉,微電流源271將會對第三電容274進行充電,當充電的電壓經過一定的時間後達到一特定值Vref(在本較佳實施例中為3.8V,但不以此為限),電壓源仍然持續提供電壓時,則延遲單元27會透過第一比較器275輸出延遲訊號至邏輯單元24,而邏輯單元可根據延遲訊號輸出邏輯訊號至控制單元25。 When the fluorescent lamp 14 is operated to be lit, the voltage source 21 supplies a voltage, and the indirect control logic unit 24 outputs a logic signal. At this time, the logic signal controls the first switch 272 to be turned off, and the second switch 273 is turned on to make it virtual. The ground terminal 15 causes an open circuit. Because the first switch 272 is turned off, the micro current source 271 will charge the third capacitor 274. When the charged voltage reaches a certain value Vref after a certain period of time (3.8V in the preferred embodiment, but not In this case, when the voltage source continues to supply voltage, the delay unit 27 outputs a delay signal to the logic unit 24 through the first comparator 275, and the logic unit can output a logic signal to the control unit 25 according to the delay signal.
控制單元25耦接至邏輯單元24,可以根據邏輯單元24輸出之邏輯訊號,輸出電流至輸出部13。 The control unit 25 is coupled to the logic unit 24, and can output current to the output unit 13 according to the logic signal output by the logic unit 24.
此外,偵測單元28耦接至邏輯單元24與交流電源AC input,透過開關螢光燈14開關所觸發的交流電壓,偵測單元28可以偵測到螢光燈14被開關的次數,並且根據螢光燈14被開關的次數輸出亮度訊號至邏輯單元24,邏輯單元24同樣會將亮度訊號輸出至控制單元25。而控制單元25會根據亮度訊號,改變震盪器的頻率,藉此改變方波的 寬窄以調整所輸出的電流量。 In addition, the detecting unit 28 is coupled to the logic unit 24 and the AC power source AC input, and the detecting unit 28 can detect the number of times the fluorescent lamp 14 is switched, and according to the AC voltage triggered by the switch fluorescent lamp 14 switch. The number of times the fluorescent lamp 14 is switched outputs a luminance signal to the logic unit 24, and the logic unit 24 also outputs a luminance signal to the control unit 25. The control unit 25 changes the frequency of the oscillator according to the brightness signal, thereby changing the square wave. Width to adjust the amount of current output.
根據上述技術,螢光燈在被打開後,由於延遲單元的作用,使的螢光燈在被重複開啟或關閉時,點亮的時間獲得了一定時間的延遲,並且可以根據偵測單元的作用,達到不同開啟次數有不同亮度的功能,充分解決的調整螢光燈亮度時,沒有必要的閃爍造成使用者眼睛的負擔,以及電能的浪費等問題。 According to the above technology, after the fluorescent lamp is turned on, due to the action of the delay unit, when the fluorescent lamp is repeatedly turned on or off, the lighting time is delayed for a certain time, and can be based on the function of the detecting unit. , to achieve different brightness with different opening times, fully solve the problem of adjusting the brightness of the fluorescent lamp, there is no need to flash the user's eyes, and the waste of electrical energy.
請在參閱第3圖,其係為本發明較佳實施例之螢光燈調光方法步驟圖,如第3圖所示,首先提供電壓源(S1),在提供電壓源之後,提供一電流源以進行充電動作(S2),當充電動作完成時,則輸出驅動電源點亮螢光燈(S31),否則當充電動作未完成,則不點亮螢光燈(S32),等到充電完成時才點亮螢光燈,接著停止提供電壓源(S4),停止供電後,電流源也中斷,開始進行放電動作(S5),此時偵測電壓源提供的次數,並根據電壓源提供的次數來決定步驟S31中,點亮螢光燈的亮度(S6)。如此再重新提供電壓源,便可以得到不同的螢光燈亮度,並且在打開螢光燈時有一個緩衝的充電時間,避免螢光燈的閃爍造成對眼睛的傷害,同時節省不必要的電能浪費,更能延長螢光燈的壽命。 Please refer to FIG. 3, which is a step diagram of a fluorescent lamp dimming method according to a preferred embodiment of the present invention. As shown in FIG. 3, a voltage source (S1) is first provided, and a current is supplied after the voltage source is supplied. The source performs the charging operation (S2). When the charging operation is completed, the output driving power source illuminates the fluorescent lamp (S31). Otherwise, when the charging operation is not completed, the fluorescent lamp is not turned on (S32), and when the charging is completed, the charging is completed. The fluorescent lamp is turned on, then the voltage source is stopped (S4). After the power supply is stopped, the current source is also interrupted, and the discharging operation is started (S5). At this time, the number of times the voltage source is supplied is detected, and the number of times is provided according to the voltage source. In step S31, the brightness of the fluorescent lamp is turned on (S6). By re-providing the voltage source, you can get different brightness of the fluorescent light, and have a buffer charging time when turning on the fluorescent light, avoiding the damage caused by the flashing of the fluorescent light, and saving unnecessary power waste. It can extend the life of fluorescent lamps.
以上所述僅為本發明之較佳實施例,凡依本發明申請專利範圍所做之均等變化與修飾,皆應屬本發明之涵蓋範圍。 The above are only the preferred embodiments of the present invention, and all changes and modifications made to the scope of the present invention should be within the scope of the present invention.
1‧‧‧螢光燈驅動電路 1‧‧‧Fluorescent lamp drive circuit
11‧‧‧轉換部 11‧‧‧Transition Department
111‧‧‧第一二極體 111‧‧‧First Diode
112‧‧‧第二二極體 112‧‧‧Secondary diode
113‧‧‧第三二極體 113‧‧‧ Third Dipole
114‧‧‧第四二極體 114‧‧‧Fourth dipole
12‧‧‧控制部 12‧‧‧Control Department
13‧‧‧輸出部 13‧‧‧Output Department
131‧‧‧第一NMOS 131‧‧‧First NMOS
132‧‧‧第二NMOS 132‧‧‧second NMOS
133‧‧‧電感 133‧‧‧Inductance
134‧‧‧第一電容 134‧‧‧first capacitor
14‧‧‧螢光燈 14‧‧‧Flood light
141‧‧‧第二電容 141‧‧‧second capacitor
142‧‧‧電阻 142‧‧‧resistance
15‧‧‧虛擬接地端 15‧‧‧virtual ground
AC input‧‧‧交流電源 AC input‧‧‧AC power supply
21‧‧‧電壓源 21‧‧‧Voltage source
22‧‧‧備用電源 22‧‧‧Reserved power supply
23‧‧‧電壓穩壓單元 23‧‧‧Voltage regulator unit
24‧‧‧邏輯單元 24‧‧‧Logical unit
25‧‧‧控制單元 25‧‧‧Control unit
27‧‧‧延遲單元 27‧‧‧Delay unit
271‧‧‧微電流源 271‧‧‧Microcurrent source
272‧‧‧第一開關 272‧‧‧First switch
273‧‧‧第二開關 273‧‧‧second switch
274‧‧‧第三電容 274‧‧‧ third capacitor
275‧‧‧比較器 275‧‧‧ comparator
28‧‧‧偵測單元 28‧‧‧Detection unit
S1~S6‧‧‧方法步驟 S1~S6‧‧‧ method steps
第1圖係顯示本發明較佳實施例之螢光燈驅動電路電路圖;第2圖為本發明較佳實施例之控制部電路方塊圖;第3圖為本發明較佳實施例之螢光燈調光方法步驟圖。 1 is a circuit diagram of a fluorescent lamp driving circuit of a preferred embodiment of the present invention; FIG. 2 is a block diagram of a control portion of a preferred embodiment of the present invention; and FIG. 3 is a fluorescent lamp of a preferred embodiment of the present invention; Dimming method step diagram.
12‧‧‧控制部 12‧‧‧Control Department
15‧‧‧虛擬接地端 15‧‧‧virtual ground
21‧‧‧電壓源 21‧‧‧Voltage source
22‧‧‧備用電源 22‧‧‧Reserved power supply
23‧‧‧電壓偵測單元 23‧‧‧Voltage detection unit
24‧‧‧邏輯單元 24‧‧‧Logical unit
25‧‧‧控制單元 25‧‧‧Control unit
27‧‧‧延遲單元 27‧‧‧Delay unit
28‧‧‧偵測單元 28‧‧‧Detection unit
271‧‧‧微電流源 271‧‧‧Microcurrent source
272‧‧‧第一開關 272‧‧‧First switch
273‧‧‧第二開關 273‧‧‧second switch
274‧‧‧第三電容 274‧‧‧ third capacitor
275‧‧‧比較器 275‧‧‧ comparator
Claims (18)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
TW097130655A TWI517760B (en) | 2008-08-12 | 2008-08-12 | Lamp brightness adjusted circuit |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
TW097130655A TWI517760B (en) | 2008-08-12 | 2008-08-12 | Lamp brightness adjusted circuit |
Publications (2)
Publication Number | Publication Date |
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TW201008386A TW201008386A (en) | 2010-02-16 |
TWI517760B true TWI517760B (en) | 2016-01-11 |
Family
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Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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TW097130655A TWI517760B (en) | 2008-08-12 | 2008-08-12 | Lamp brightness adjusted circuit |
Country Status (1)
Country | Link |
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TW (1) | TWI517760B (en) |
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2008
- 2008-08-12 TW TW097130655A patent/TWI517760B/en not_active IP Right Cessation
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Publication number | Publication date |
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TW201008386A (en) | 2010-02-16 |
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