TWI611727B - Light emitting driving apparatus and signal modulating module thereof - Google Patents
Light emitting driving apparatus and signal modulating module thereof Download PDFInfo
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- TWI611727B TWI611727B TW106108051A TW106108051A TWI611727B TW I611727 B TWI611727 B TW I611727B TW 106108051 A TW106108051 A TW 106108051A TW 106108051 A TW106108051 A TW 106108051A TW I611727 B TWI611727 B TW I611727B
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B20/00—Energy efficient lighting technologies, e.g. halogen lamps or gas discharge lamps
- Y02B20/30—Semiconductor lamps, e.g. solid state lamps [SSL] light emitting diodes [LED] or organic LED [OLED]
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Abstract
一種信號調整模組，應用於一發光二極體驅動裝置中並包含一輸入端點、一輸出端點、一開關控制單元及一開關；開關控制單元電連接於輸入端點並接收一發光控制信號，開關電連接於輸入端點、輸出端點及開關控制單元。開關控制單元於發光控制信號的位準達到一第一臨界位準時驅使開關導通，並於發光控制信號的位準達到一第二臨界位準時驅使開關截止，以降低該發光控制信號由上限位準轉換至下限位準之一信號轉換時間。 A signal adjustment module is applied to a light-emitting diode driving device and includes an input terminal, an output terminal, a switch control unit and a switch; the switch control unit is electrically connected to the input end point and receives an illumination control The signal is electrically connected to the input terminal, the output terminal, and the switch control unit. The switch control unit drives the switch to be turned on when the level of the light-emitting control signal reaches a first critical level, and drives the switch to turn off when the level of the light-emitting control signal reaches a second critical level to reduce the upper limit level of the light-emitting control signal. Convert to one of the lower limit levels for signal conversion time.
Description
本創作是關於驅動裝置其信號調整模組，且特別是有關於用以驅動發光二極體燈串產生光色變化之驅動裝置及其信號調整模組。 The present invention relates to a signal adjustment module of a driving device, and particularly to a driving device for driving a light color change of a light emitting diode string and a signal adjusting module thereof.
發光二極體(light emitting diode；簡稱LED)為一種半導體元件，主要透過半導體化合物將電能轉換為光能以達到發光效果，因此具有壽命長、穩定性高及低耗電量等優點，而廣泛地應用於室內外照明、裝飾照明及廣告照明。 A light emitting diode (LED) is a semiconductor component that converts electrical energy into light energy through a semiconductor compound to achieve a luminous effect, thereby having the advantages of long life, high stability, and low power consumption. It is used in indoor and outdoor lighting, decorative lighting and advertising lighting.
一般來說，以發光二極體作為光源的燈具(以下簡稱發光二極體燈具)可包含一驅動電路及至少一發光二極體燈串，驅動電路電連接於發光二極體燈串，並提供包含高電壓及低電壓的驅動信號來驅動發光二極體燈串；發光二極體燈串包含串聯連接的複數發光二極體。在發光二極體燈串中，串接的發光二極體愈多，用以連接發光二極體的連接線越粗及長，這使得發光二極體燈串的寄生容抗增加，增加了錯誤解讀發光信號的機會；若要有效地避免發光二極體燈串錯誤解讀發光控制信號，就必須放慢發光控制信號在高電壓及低電壓轉換的速度(即延長發光控制信號的在高電壓或低 電壓的寬度)；然如此卻導致發光二極體燈串能夠推動的燈數較少或是光色變化速度變慢，也因而增加了成本。 In general, a light-emitting diode (hereinafter referred to as a light-emitting diode lamp) may include a driving circuit and at least one light-emitting diode light string, and the driving circuit is electrically connected to the light-emitting diode light string, and A driving signal including a high voltage and a low voltage is provided to drive the LED string; the LED string includes a plurality of LEDs connected in series. In the LED array, the more LEDs are connected in series, the thicker and longer the connection line for connecting the LEDs, which increases the parasitic capacitance of the LED strings. Misinterpretation of the opportunity of the illuminating signal; if the illuminating control signal is to be effectively avoided by the illuminating diode string, the illuminating control signal must be slowed down at the high voltage and low voltage (ie, the illuminating control signal is extended at the high voltage). Or low The width of the voltage); however, this results in a smaller number of lamps that the LED string can be driven or a slower change in the color of the light, which increases the cost.
本創作的目的在於解決發光二極體驅動裝置的發光控制信號無法很快轉換的問題。 The purpose of this creation is to solve the problem that the illumination control signal of the LED driving device cannot be quickly converted.
本發明之一目的在於提供一種信號調整模組，其應用於一發光二極體驅動裝置中，用以調整一發光控制信號之一信號轉換時間；信號調整模組包含一輸入端點、一輸出端點、一開關控制單元及一開關。開關控制單元電連接於輸入端點並接收發光控制信號；其中發光控制信號為具有一上限位準及一下限位準之一脈衝寬度調變信號。開關電連接於輸入端點及輸出端點之間並電連接於該開關控制單元；開關控制單元於發光控制信號的位準達到一第一臨界位準時驅使開關導通，並於發光控制信號的位準達到一第二臨界位準時驅使開關截止，以降低發光控制信號由該上限位準轉換至該下限位準之一信號轉換時間，第一臨界位準大於第二臨界位準。 An object of the present invention is to provide a signal adjustment module for use in a light-emitting diode driving device for adjusting a signal conversion time of an illumination control signal; the signal adjustment module includes an input terminal and an output. End point, a switch control unit and a switch. The switch control unit is electrically connected to the input end point and receives the illumination control signal; wherein the illumination control signal is a pulse width modulation signal having an upper limit level and a lower limit level. The switch is electrically connected between the input end point and the output end point and electrically connected to the switch control unit; the switch control unit drives the switch to be turned on when the level of the illumination control signal reaches a first critical level, and is in the position of the illumination control signal When the second critical level is reached, the switch is turned off to reduce the signal conversion time of the illumination control signal from the upper limit level to the lower limit level, and the first critical level is greater than the second critical level.
本發明另提供一種發光二極體驅動裝置，其接收一發光控制信號以控制複數發光二極體燈串的光色變化，發光控制信號為具有一上限位準及一下限位準之一脈衝寬度調變信號；發光二極體驅動裝置包含前段所述的信號調整模組、穩壓器及驅動模組；穩壓器電連接於輸入端點及輸出端點之間，驅動模組電連接於信號調整模組及發光二極體燈串。 The invention further provides a light-emitting diode driving device, which receives an illumination control signal to control a color change of a plurality of LED strings, and the illumination control signal has a pulse width of one upper limit level and one lower limit level. Modulation signal; the LED driving device comprises the signal adjustment module, the voltage regulator and the driving module described in the preceding paragraph; the voltage regulator is electrically connected between the input end point and the output end point, and the driving module is electrically connected Signal adjustment module and LED light string.
透過前述技術方案，可以有效地縮減發光控制信號由上限位準轉換至下限位準的信號轉換時間，進而可加快發光控制信號在高電壓及低電壓轉換的速度。 Through the foregoing technical solution, the signal conversion time of the light-emitting control signal from the upper limit level to the lower limit level can be effectively reduced, thereby further speeding up the high-voltage and low-voltage conversion of the light-emitting control signal.
1‧‧‧發光二極體燈具 1‧‧‧Lighting diode lamps
10‧‧‧電源轉換電路 10‧‧‧Power conversion circuit
12‧‧‧控制電路 12‧‧‧Control circuit
14‧‧‧發光系統 14‧‧‧Lighting system
16‧‧‧發光二極體燈串 16‧‧‧Lighting diode string
18‧‧‧發光二極體驅動裝置 18‧‧‧Lighting diode drive
180‧‧‧穩壓器 180‧‧‧Regulator
181‧‧‧信號調整模組 181‧‧‧Signal adjustment module
182‧‧‧定電壓產生器 182‧‧‧ Constant voltage generator
183‧‧‧減法器 183‧‧‧Subtractor
184‧‧‧位準比較單元 184‧‧ ‧ level comparison unit
1840、1842‧‧‧緩衝器 1840, 1842‧‧‧ buffer
186‧‧‧開關驅動單元 186‧‧‧Switch drive unit
187‧‧‧開關控制單元 187‧‧‧Switch control unit
188‧‧‧開關 188‧‧‧ switch
189‧‧‧驅動模組 189‧‧‧Drive Module
190‧‧‧振盪器 190‧‧‧Oscillator
3‧‧‧電腦 3‧‧‧ computer
B、G、R‧‧‧輸出端點 B, G, R‧‧‧ output endpoints
C‧‧‧電容器 C‧‧‧ capacitor
D‧‧‧二極體 D‧‧‧ diode
DCH‧‧‧開關驅動信號 DCH‧‧‧ switch drive signal
IN‧‧‧輸入端點 IN‧‧‧ input endpoint
OP1‧‧‧第一運算放大器 OP1‧‧‧First Operational Amplifier
OP2‧‧‧第二運算放大器 OP2‧‧‧Second operational amplifier
OUT‧‧‧輸出端點 OUT‧‧‧ output endpoint
R1‧‧‧第一電阻器 R1‧‧‧ first resistor
R2‧‧‧第二電阻器 R2‧‧‧second resistor
VAC‧‧‧交流電源 VAC‧‧‧AC power supply
VH‧‧‧第一臨界電壓 VH‧‧‧first threshold voltage
VHP‧‧‧第一信號 VHP‧‧‧ first signal
VLP‧‧‧第二信號 VLP‧‧‧second signal
VL‧‧‧第二臨界電壓 VL‧‧‧second threshold voltage
圖1繪示依照本創作第一實施方式之發光二極體燈具之電路方塊圖；圖2繪示依照本創作第一實施方式之發光二極體驅動裝置之電路方塊圖；圖3繪示依照本創作第一實施方式之位準比較單元之電路圖；圖4A繪示發光控制信號、第一信號、第二信號及開關驅動信號之波形圖；圖4B繪示發光控制信號之波形圖；圖5繪示依照本創作第二實施方式之發光二極體驅動裝置之電路方塊圖；圖6繪示依照本創作第三實施方式之發光二極體驅動裝置之電路方塊圖；圖7A繪示發光控制信號、第一信號、第二信號及開關驅動信號之波形圖；以及圖7B繪示發光控制信號之波形圖。 1 is a circuit block diagram of a light-emitting diode lamp according to a first embodiment of the present invention; FIG. 2 is a circuit block diagram of a light-emitting diode driving device according to a first embodiment of the present invention; The circuit diagram of the level comparison unit of the first embodiment of the present invention; FIG. 4A is a waveform diagram of the illumination control signal, the first signal, the second signal, and the switch drive signal; FIG. 4B is a waveform diagram of the illumination control signal; FIG. 6 is a circuit block diagram of a light-emitting diode driving device according to a third embodiment of the present invention; FIG. 7 is a circuit block diagram of the light-emitting diode driving device according to the third embodiment of the present invention; A waveform diagram of the signal, the first signal, the second signal, and the switch drive signal; and FIG. 7B illustrates a waveform diagram of the illumination control signal.
請參見圖1，其繪示依照本創作第一實施方式之發光二極體燈具之電路方塊圖。發光二極體燈具1電連接於一交流電源VAC，並包含 一電源轉換電路10、一控制電路12及複數發光系統14；每個發光系統14包含至少一發光二極體燈串16及一發光二極體驅動裝置18。使用者可透過電腦3將用以控制發光系統14之控制資料輸入控制電路12，來控制發光系統14的光色變化。 Please refer to FIG. 1 , which is a circuit block diagram of a light-emitting diode lamp according to a first embodiment of the present invention. The light-emitting diode lamp 1 is electrically connected to an AC power source VAC and includes A power conversion circuit 10, a control circuit 12 and a plurality of illumination systems 14; each illumination system 14 includes at least one LED array 16 and a LED driver 18. The user can control the light color change of the illumination system 14 through the computer 3 to control the data input control circuit 12 for controlling the illumination system 14.
電源轉換電路10電連接於交流電源VAC，其接收交流電源VAC並將其轉換成一直流電源；直流電源供給控制電路12及發光系統14。控制電路12可將電腦3提供的控制資料轉換為一發光控制信號，以利傳送；其中，發光控制信號為一脈波寬度調變信號，且直流電源及發光控制信號透過相同的傳輸線傳送至發光系統14。 The power conversion circuit 10 is electrically connected to the AC power source VAC, which receives the AC power source VAC and converts it into a DC power source; the DC power source is supplied to the control circuit 12 and the illumination system 14. The control circuit 12 can convert the control data provided by the computer 3 into an illumination control signal for facilitating transmission; wherein the illumination control signal is a pulse width modulation signal, and the DC power supply and the illumination control signal are transmitted to the illumination through the same transmission line. System 14.
請參見圖2，其繪示依照本創作第一實施方式之發光二極體驅動裝置之電路方塊圖。在圖2中，發光二極體驅動裝置18具有輸入端點IN及輸出端點OUT；輸入端點IN為可接收來自於前級電路之直流電源及發光控制信號之端點，輸出端點OUT為輸出直流電源及發光控制信號之端點。更具體言之，對圖1所示的第一個發光系統14來說(即連接於控制電路的發光系統14)，輸入端點IN可接收來自於控制電路12之直流電源及發光控制信號；對於第二個發光系統14來說，輸入端點IN可接收來自前一個發光系統14之直流電源及發光控制信號，以此類推。輸出端點OUT表示傳送電力及發光控制信號至下一個發光系統14之端點。 Referring to FIG. 2, a circuit block diagram of a light emitting diode driving device according to a first embodiment of the present invention is shown. In FIG. 2, the LED driver 18 has an input terminal IN and an output terminal OUT. The input terminal IN is an end point for receiving DC power and illumination control signals from the pre-stage circuit, and the output terminal OUT It is the end point of the output DC power supply and the illumination control signal. More specifically, for the first illumination system 14 shown in FIG. 1 (ie, the illumination system 14 connected to the control circuit), the input terminal IN can receive the DC power source and the illumination control signal from the control circuit 12; For the second illumination system 14, the input terminal IN can receive the DC power and illumination control signals from the previous illumination system 14, and so on. The output terminal OUT represents the end point of the transmission of power and illumination control signals to the next illumination system 14.
請再次參見圖2；發光二極體驅動裝置18包含一穩壓器180、一信號調整模組181、一驅動模組189及一振盪器190。輸入端點IN通過穩壓器180電連接至輸出端點OUT。直流電源由輸入端點IN傳遞至 穩壓器180，穩壓器180據此以提供發光二極體驅動裝置18中各模組及構件一直流電壓。 Referring to FIG. 2 again, the LED driver 18 includes a voltage regulator 180, a signal adjustment module 181, a driving module 189, and an oscillator 190. The input terminal IN is electrically coupled to the output terminal OUT through a voltage regulator 180. DC power is passed from input terminal IN to The voltage regulator 180 and the voltage regulator 180 are configured to provide a constant voltage of each module and component in the LED driver 18.
信號調整模組181包含一定電壓產生器182、一位準比較單元184、一開關驅動單元186及一開關188；其中，定電壓產生器182、位準比較單元184及開關驅動單元186還配合形成一開關控制單元(未另標號)以控制開關188的狀態(即閉合或開啟)。定電壓產生器182電連接於穩壓器180；定電壓產生器182接收穩壓器180提供的直流電壓並產生一第一臨界電壓VH及一第二臨界電壓VL；其中，第一臨界電壓VH的位準(以下稱第一臨界位準)高於第二臨界電壓VL的位準(以下稱第二臨界位準)。 The signal adjustment module 181 includes a certain voltage generator 182, a quasi-comparison unit 184, a switch drive unit 186, and a switch 188. The constant voltage generator 182, the level comparison unit 184, and the switch drive unit 186 are also formed. A switch control unit (not otherwise labeled) controls the state of the switch 188 (ie, closed or open). The constant voltage generator 182 is electrically connected to the voltage regulator 180; the constant voltage generator 182 receives the DC voltage provided by the voltage regulator 180 and generates a first threshold voltage VH and a second threshold voltage VL; wherein, the first threshold voltage VH The level (hereinafter referred to as the first critical level) is higher than the level of the second threshold voltage VL (hereinafter referred to as the second critical level).
位準比較單元184電連接於輸入端點IN、穩壓器180及定電壓產生器182，位準比較單元184將發光控制信號與第一臨界電壓VH、第二臨界電壓VL進行比較，並於發光控制信號的位準達到第一臨界位準時產生一第一信號，於發光控制信號的位準達到第二臨界位準時產生一第二信號。 The level comparison unit 184 is electrically connected to the input terminal IN, the voltage regulator 180 and the constant voltage generator 182, and the level comparison unit 184 compares the light emission control signal with the first threshold voltage VH and the second threshold voltage VL, and A first signal is generated when the level of the illumination control signal reaches the first critical level, and a second signal is generated when the level of the illumination control signal reaches the second critical level.
請參見圖3，其繪示依照本創作第一實施方式之位準比較單元的電路圖。為了方便說明，圖3中同時繪示出輸入端點IN、定電壓產生器182、開關驅動單元186及開關188。位準比較單元184包含一第一電阻器R1、一第二電阻器R2、一第一運算放大器OP1及一第二運算放大器OP2；第一運算放大器OP1及第二運算放大器OP2的反向輸入端除了通過一第一電阻器R1電連接至輸入端IN以接收發光控制信號之外，還通過第二電阻器R2電連接至地端；第一運算放 大器OP1及第二運算放大器OP2的輸出端皆連接至開關驅動單元186，開關驅動單元186電連接於開關188。第一運算放大器OP1的非反向輸入端電連接於定電壓產生器182，以接收定電壓產生器182輸出之第一臨界電壓VH；第二運算放大器OP2的非反向輸入端電連接於定電壓產生器182，以接收定電壓產生器182輸出的第二臨界電壓VL。開關188為一n通道電晶體開關。 Referring to FIG. 3, a circuit diagram of a level comparison unit according to the first embodiment of the present invention is shown. For convenience of explanation, the input terminal IN, the constant voltage generator 182, the switch drive unit 186, and the switch 188 are simultaneously illustrated in FIG. The level comparison unit 184 includes a first resistor R1, a second resistor R2, a first operational amplifier OP1 and a second operational amplifier OP2; and an inverting input terminal of the first operational amplifier OP1 and the second operational amplifier OP2. In addition to being electrically connected to the input terminal IN through a first resistor R1 to receive the illumination control signal, the second resistor R2 is electrically connected to the ground terminal; The outputs of the amplifier OP1 and the second operational amplifier OP2 are both connected to the switch drive unit 186, and the switch drive unit 186 is electrically connected to the switch 188. The non-inverting input terminal of the first operational amplifier OP1 is electrically connected to the constant voltage generator 182 to receive the first threshold voltage VH output by the constant voltage generator 182; the non-inverting input terminal of the second operational amplifier OP2 is electrically connected to the The voltage generator 182 receives the second threshold voltage VL output by the constant voltage generator 182. Switch 188 is an n-channel transistor switch.
請參見圖4A，其繪示一發光控制信號之波形圖。由圖4A可知，發光控制信號為具有一上限位準及一下限位準的脈衝寬度調變信號；在單一週期中，脈衝寬度調變信號始於上限位準轉換為下限位準的時序，終於下限位準轉換為上限位準的時序。此外，在圖4A中，發光控制信號的下限位準非為零位準。在過去，當發光二極體燈串16具有大量串接的發光二極體時，發光二極體的容抗會延長發光控制信號由上限位準轉換至下限位準的時間；為了解決前述問題，本創作於輸入端點IN及輸出端點OUT之間加入開關控制單元及開關188，且開關控制單元在發光控制信號界於第一臨界位準及第二臨界位準之間時，驅使開關188導通，以增加發光控制信號的位準的下降速度(即使發光控制信號快速放電)，藉此有效地降低發光控制信號由上限位準轉換至下限位準的信號轉換時間。 Referring to FIG. 4A, a waveform diagram of an illumination control signal is shown. As can be seen from FIG. 4A, the illumination control signal is a pulse width modulation signal having an upper limit level and a lower limit level; in a single cycle, the pulse width modulation signal starts from the upper limit level to the lower limit level, and finally The timing at which the lower limit level is converted to the upper limit level. Further, in FIG. 4A, the lower limit level of the illumination control signal is not zero level. In the past, when the light-emitting diode string 16 has a large number of serially connected light-emitting diodes, the capacitive reactance of the light-emitting diodes lengthens the time during which the light-emitting control signal is switched from the upper limit level to the lower limit level; The present invention adds a switch control unit and a switch 188 between the input terminal IN and the output terminal OUT, and the switch control unit drives the switch when the illumination control signal is between the first critical level and the second critical level. 188 is turned on to increase the falling speed of the level of the illumination control signal (even if the illumination control signal is rapidly discharged), thereby effectively reducing the signal conversion time of the illumination control signal from the upper limit level to the lower limit level.
更具體言之，圖3所繪示的第一運算放大器OP1比較發光控制信號的位準及第一臨界位準，並於發光控制信號的位準達到第一臨界位準時產生一第一信號VHP，如圖4A中t1點所示；開關驅動單元 186接收第一信號VHP並產生呈高位準的開關驅動信號DCH來驅使開關188導通；如此一來，發光控制信號的位準會快速地降低。 More specifically, the first operational amplifier OP1 shown in FIG. 3 compares the level of the illumination control signal with the first critical level, and generates a first signal VHP when the level of the illumination control signal reaches the first critical level. , as shown by point t1 in Figure 4A; switch drive unit The 186 receives the first signal VHP and generates a high level switch drive signal DCH to drive the switch 188 to conduct; as a result, the level of the illumination control signal is rapidly reduced.
第二運算放大器OP1比較發光控制信號的位準及第二臨界位準，並於發光控制信號的位準達到第二臨界位準時產生一第二信號VLP，如圖4A中t2點所示。開關驅動單元186接收第二信號VLP並產生呈低位準的開關驅動信號DCH(如圖4A時間點t2所示)以驅使開關188截止，停止發光控制信號快速放電，進而節省耗電。 The second operational amplifier OP1 compares the level of the illumination control signal with the second critical level, and generates a second signal VLP when the level of the illumination control signal reaches the second critical level, as indicated by point t2 in FIG. 4A. The switch driving unit 186 receives the second signal VLP and generates a switch driving signal DCH (shown as time t2 in FIG. 4A) to lower the switch 188 to stop the illuminating control signal from being quickly discharged, thereby saving power consumption.
總言之，在圖4A所示t1~t2之間，由輸入端點IN進入發光二極體驅動裝置18的發光控制信號的位準因開關188導通而快速地降低(如圖4B所示)，可有效地縮減發光控制信號由上限位準轉換為下限位準的信號轉換時間；如此一來，也可以縮減發光控制信號在上限位準及下限位轉間的轉換速度。在此要特別說明的是，圖4A所示內容為尚未由信號調整模組181整形前之發光控制信號，圖4A所標示t1為發光控制信號的位準達到第一臨界位準的時間點，t2為發光控制信號的位準達到第二臨界位準的時間點；圖4B所示為通過信號調整模組181整形後的發光控制信號，圖4B所標示t1及t2係同於圖4A所標示的t1及t2，即t1對應於圖4A發光控制信號的位準達到第一臨界位準的時間點，t2對應於發光控制信號的位準達到第二臨界位準的時間點。由圖4A及圖4B之比較可知，在圖4A所示t1~t2之間緩慢下降的位準在經信號調整模組181整形可如圖4B所示般快速下降。 In summary, between t1 and t2 shown in FIG. 4A, the level of the light-emission control signal entering the light-emitting diode driving device 18 from the input terminal IN is rapidly lowered by the switch 188 being turned on (as shown in FIG. 4B). The signal conversion time of the illumination control signal from the upper limit level to the lower limit level can be effectively reduced; thus, the conversion speed of the illumination control signal between the upper limit level and the lower limit position can also be reduced. It should be particularly noted that the content shown in FIG. 4A is an illumination control signal that has not been shaped by the signal adjustment module 181. The t1 indicated in FIG. 4A is a time point at which the level of the illumination control signal reaches the first critical level. T2 is the time point at which the level of the illumination control signal reaches the second critical level; FIG. 4B shows the illumination control signal after being shaped by the signal adjustment module 181, and t1 and t2 indicated in FIG. 4B are the same as those indicated in FIG. 4A. T1 and t2, that is, t1 corresponds to the time point at which the level of the illumination control signal of FIG. 4A reaches the first critical level, and t2 corresponds to the time point at which the level of the illumination control signal reaches the second critical level. As can be seen from the comparison of FIG. 4A and FIG. 4B, the level that slowly decreases between t1 and t2 shown in FIG. 4A can be quickly decreased as shown in FIG. 4B after being shaped by the signal adjustment module 181.
復參閱圖2；驅動模組189電連接於信號調整模組181及振盪器190；驅動模組189接收通過信號調整模組181整形後的發光控制信號，並據此以驅使連接於輸出端點R、G、B之發光二極體燈串16產生光色變化；振盪器190更電連接於穩壓器180及開關驅動單元186。 Referring to FIG. 2, the driving module 189 is electrically connected to the signal adjusting module 181 and the oscillator 190; the driving module 189 receives the lighting control signal shaped by the signal adjusting module 181, and drives the connection to the output terminal accordingly. The LEDs 16 of the R, G, and B light color variations are generated; the oscillator 190 is further electrically connected to the regulator 180 and the switch driving unit 186.
請參見圖5，其繪示依照本創作第二實施方式之發光二極體驅動裝置之電路方塊圖。發光二極體驅動裝置18包含一穩壓器180、一信號調整模組181、一驅動模組189及一振盪器190；信號調整模組181包含一電壓減法器183、複數緩衝器1840和1842、一開關驅動單元186及一開關188。電壓減法器183電連接於輸入端點IN及穩壓器180；電壓減法器183接收發光控制信號及穩壓器180提供之一直流電壓，並產生一第一臨界電壓VH及一第二臨界電壓VL。緩衝器1840和1842設置在電壓減法器183及開關驅動單元186之間，並電連接在電壓減法器183及開關驅動單元186，以個別地將第一臨界電壓VH及第二臨界電壓VL傳遞至開關驅動單元186。 Referring to FIG. 5, a circuit block diagram of a light emitting diode driving device according to a second embodiment of the present invention is shown. The LED driver 18 includes a voltage regulator 180, a signal adjustment module 181, a driving module 189 and an oscillator 190. The signal adjustment module 181 includes a voltage subtractor 183, a plurality of buffers 1840 and 1842. A switch drive unit 186 and a switch 188. The voltage subtractor 183 is electrically connected to the input terminal IN and the voltage regulator 180; the voltage subtractor 183 receives the illumination control signal and the regulator 180 provides a DC voltage, and generates a first threshold voltage VH and a second threshold voltage. VL. The buffers 1840 and 1842 are disposed between the voltage subtractor 183 and the switch driving unit 186, and are electrically connected to the voltage subtractor 183 and the switch driving unit 186 to individually transmit the first threshold voltage VH and the second threshold voltage VL to Switch drive unit 186.
電壓減法器183可於發光控制信號的位準達到第一臨界電壓VH的位準時輸出如圖4A所示的第一信號VHP予開關驅動單元186，使開關驅動單元186輸出高位準的開關驅動信號DCH來驅使開關188導通，使發光控制信號加快放電。之後，當發光控制信號的位準達到第二臨界電壓VL的位準時，電壓減法器185可輸出如圖4A所示的第二信號VLP予開關驅動單元186，以讓開關驅動單元186輸出低位準的開關驅動信號DCH來讓開關188截止，以停止讓發光控制信 號加快放電，達到省電的效果；其中第一臨界電壓VH的位準大於第二臨界電壓VL的位準。藉此，可以有效地縮減發光控制信號由上限位準轉換為下限位準的信號轉換時間。 The voltage subtractor 183 can output the first signal VHP to the switch driving unit 186 as shown in FIG. 4A when the level of the light emission control signal reaches the level of the first threshold voltage VH, so that the switch driving unit 186 outputs the high level switch driving signal. The DCH drives the switch 188 to conduct, causing the illumination control signal to accelerate discharge. Thereafter, when the level of the illumination control signal reaches the level of the second threshold voltage VL, the voltage subtractor 185 can output the second signal VLP to the switch driving unit 186 as shown in FIG. 4A, so that the switch driving unit 186 outputs the low level. The switch drives the signal DCH to turn off the switch 188 to stop the illumination control signal The number accelerates the discharge to achieve the effect of power saving; wherein the level of the first threshold voltage VH is greater than the level of the second threshold voltage VL. Thereby, the signal conversion time in which the illumination control signal is converted from the upper limit level to the lower limit level can be effectively reduced.
圖5所繪示的穩壓器180、驅動模組189及振盪器190的功能及連接方式皆與圖2相同，在此不予墜述；圖5所繪示的發光二極體驅動裝置18至少可以達到如圖2所示之發光二極體驅動裝置18相同的功能。 The function and connection mode of the voltage regulator 180, the driving module 189 and the oscillator 190 shown in FIG. 5 are the same as those in FIG. 2, and will not be described here; the LED driving device 18 shown in FIG. At least the same function as the LED driver 18 shown in FIG. 2 can be achieved.
請參見圖6，其繪示依照本創作第三實施方式之發光二極體驅動裝置之電路方塊圖。在圖6中，發光二極體驅動裝置18包含一輸入端點IN、一輸出端點OUT、一穩壓器180、一信號調整模組181、一驅動模組189及振盪器190。輸入端點IN通過一二極體D及穩壓器180電連接至輸出端點OUT。一電容器C的一端通過二極體D電連接於輸入端點IN，另一端連接於輸出端點OUT。二極體D的陽極連接於輸入端點IN，陰極連接於穩壓器180及電容器C。振盪器190連接於二極體D的陰極。 Referring to FIG. 6, a circuit block diagram of a light emitting diode driving device according to a third embodiment of the present invention is shown. In FIG. 6, the LED driver 18 includes an input terminal IN, an output terminal OUT, a voltage regulator 180, a signal adjustment module 181, a driving module 189, and an oscillator 190. The input terminal IN is electrically coupled to the output terminal OUT through a diode D and a voltage regulator 180. One end of a capacitor C is electrically connected to the input terminal IN through the diode D, and the other end is connected to the output terminal OUT. The anode of the diode D is connected to the input terminal IN, and the cathode is connected to the regulator 180 and the capacitor C. The oscillator 190 is connected to the cathode of the diode D.
信號調整模組181包含一開關控制單元187及一開關188，開關188電連接於輸入端點IN、輸出端點OUT及開關控制單元187。開關控制單元187從輸入端點IN接收一發光控制信號，並進一步調整該發光控制信號的波形；發光控制信號為具有一上限位準及一下限位準之一脈衝寬度調變信號，發光控制信號之下限位準可如圖7A所示為零位準。 The signal adjustment module 181 includes a switch control unit 187 and a switch 188 electrically connected to the input terminal IN, the output terminal OUT, and the switch control unit 187. The switch control unit 187 receives an illumination control signal from the input terminal IN and further adjusts the waveform of the illumination control signal; the illumination control signal is a pulse width modulation signal having an upper limit level and a lower limit level, and the illumination control signal The lower limit level can be zero level as shown in Figure 7A.
於發光控制信號的位準達到如圖7A所示之一第一臨界電壓VH的位準時，開關控制單元187輸出高位準的開關驅動信號DCH(如圖7A中t1點所示)來驅使開關188導通；之後，當發光控制信號的位準達到第二臨界電壓VL的位準時，開關控制單元187輸出低位準的開關驅動信號DCH(如圖7A中t2點所示)來讓開關188截止；其中，第一臨界電壓VH的位準大於第二臨界電壓VL的位準。藉此，可以有效地縮減發光控制信號由上限位準轉換為下限位準的信號轉換時間。圖6所繪示的穩壓器180、驅動模組189及振盪器190的功能及連接方式皆與圖2相同，在此不予墜述；圖6所繪示的發光二極體驅動裝置18至少可以達到如圖2所示之發光二極體驅動裝置18相同的功能。 When the level of the illumination control signal reaches a level of the first threshold voltage VH as shown in FIG. 7A, the switch control unit 187 outputs a high level switch drive signal DCH (shown as point t1 in FIG. 7A) to drive the switch 188. Turning on; afterwards, when the level of the illumination control signal reaches the level of the second threshold voltage VL, the switch control unit 187 outputs a low level switch drive signal DCH (shown as point t2 in FIG. 7A) to turn off the switch 188; The level of the first threshold voltage VH is greater than the level of the second threshold voltage VL. Thereby, the signal conversion time in which the illumination control signal is converted from the upper limit level to the lower limit level can be effectively reduced. The functions and connections of the voltage regulator 180, the driving module 189, and the oscillator 190 are the same as those in FIG. 2, and will not be described here. The LED driving device 18 shown in FIG. At least the same function as the LED driver 18 shown in FIG. 2 can be achieved.
雖然本創作已以實施方式揭露如上，然其並非用以限定本創作，任何熟習此技藝者，在不脫離本創作的精神和範圍內，當可作各種的更動與潤飾，因此本創作的保護範圍當視後附的申請專利範圍所界定者為準。 Although the present invention has been disclosed in the above embodiments, it is not intended to limit the present invention, and any person skilled in the art can make various changes and refinements without departing from the spirit and scope of the present creation. The scope is subject to the definition of the scope of the patent application.
180‧‧‧穩壓器 180‧‧‧Regulator
181‧‧‧信號調整模組 181‧‧‧Signal adjustment module
182‧‧‧定電壓產生器 182‧‧‧ Constant voltage generator
184‧‧‧位準比較單元 184‧‧ ‧ level comparison unit
186‧‧‧開關驅動單元 186‧‧‧Switch drive unit
188‧‧‧開關 188‧‧‧ switch
189‧‧‧驅動模組 189‧‧‧Drive Module
190‧‧‧振盪器 190‧‧‧Oscillator
B、G、R‧‧‧輸出端點 B, G, R‧‧‧ output endpoints
IN‧‧‧輸入端點 IN‧‧‧ input endpoint
OUT‧‧‧輸出端點 OUT‧‧‧ output endpoint
VH‧‧‧第一臨界電壓 VH‧‧‧first threshold voltage
VL‧‧‧第二臨界電壓 VL‧‧‧second threshold voltage
OP1‧‧‧第一運算放大器 OP1‧‧‧First Operational Amplifier
OP2‧‧‧第二運算放大器 OP2‧‧‧Second operational amplifier
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| TWI338443B (en) * | 2007-12-28 | 2011-03-01 | Ho Win Technology | Driver output stage for a capacitive load and the control method thereof |
| TW201141300A (en) * | 2010-05-06 | 2011-11-16 | Novatek Microelectronics Corp | Method and device for driving light-emitting diode |
| TW201336346A (en) * | 2012-02-24 | 2013-09-01 | Richtek Technology Corp | Light emitting device driver circuit and control method thereof |
| TWM501708U (en) * | 2012-11-16 | 2015-05-21 | Anwell Semiconductor Corp | High stability LED control circuit |
| CN105611684A (en) * | 2015-11-09 | 2016-05-25 | 深圳市稳先微电子有限公司 | Circuit for realizing light modulation via power switch and lamp |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109951919A (en) * | 2018-12-28 | 2019-06-28 | 矽诚科技股份有限公司 | The LED light lamp and LED light string of carrier Control |
| CN109951919B (en) * | 2018-12-28 | 2020-05-15 | 矽诚科技股份有限公司 | Carrier controlled LED lamp and LED lamp string |
| US10779379B2 (en) | 2018-12-28 | 2020-09-15 | Semisilicon Technology Corp. | Carrier controlled light-emitting diode light and light-emitting diode light string having the same |
| US10791604B2 (en) | 2018-12-28 | 2020-09-29 | Semisilicon Technology Corp. | Cascading LED lights with low power consumption |
| TWI748440B (en) * | 2020-05-06 | 2021-12-01 | 威達高科股份有限公司 | Serial led driver with built-in calibratable parameters and led system using the same |
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| TW201834506A (en) | 2018-09-16 |
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