CN101155453A - Light source driving device - Google Patents

Light source driving device Download PDF

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Publication number
CN101155453A
CN101155453A CN 200610154388 CN200610154388A CN101155453A CN 101155453 A CN101155453 A CN 101155453A CN 200610154388 CN200610154388 CN 200610154388 CN 200610154388 A CN200610154388 A CN 200610154388A CN 101155453 A CN101155453 A CN 101155453A
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China
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signal
dimming
light source
module
impedance
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CN 200610154388
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Chinese (zh)
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余仲哲
洪建邦
王家伟
高进发
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硕颉科技股份有限公司
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Priority to CN 200610154388 priority Critical patent/CN101155453A/en
Publication of CN101155453A publication Critical patent/CN101155453A/en

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Abstract

A light source driving device comprises a signal process unit, a control unit and a driving unit. The signal process unit generates actuating signal and light modulating signal according the input signal. The control unit has an actuating module and a light modulating module, wherein the actuating module starts the driving device according to the actuating signal, and the light modulating module generates light modulating drive signal according the light modulating signal. The driving unit regulates the lightness of the light source according to the light modulating driving signal.

Description

技术领域本发明是有关于一种光源的驱动装置,且特别是有关于一种只须接收一种输入信号便可被启动,并据以决定调光程度的驱动装置。 Technical Field The present invention relates to a light source driving apparatus, and more particularly relates to a can only receive one input signal is activated, and accordingly determines the dimming level of the drive device. 背景技术随着显示器功能的增加,因此于显示器中所采用的集成电路(Integrated Circuit, IC)的电路复杂度也不断增加,导致集成电路需要接收许多不同的控制信号,以达成消费者所需要的诸多功能。 Background Art As a display function, the circuit complexity of the IC (Integrated Circuit, IC) is used in the display is also increased, resulting in an integrated circuit requires a number of different received control signals, to achieve the desired consumer many other features. 而用于调整显示器(Display) 中光源的发光强度的控制电路便是其中的一例,如图l所示。 And for adjusting a display (Display) control circuit of the light emission intensity of the light source is one example, as shown in Figure l. 图1为已知的控制电路的输入信号示意图。 1 is a known control circuit diagram of an input signal. 此控制电路101是用来调整光源102的发光强度,其中控制电路101以调光用的集成电路来实现,而光源102可以是由冷阴极荧光灯(Cathode Cold Fluorescent Lamp, CCFL)所组成,或是由发光二极管(Light Emitting Diode, LED)所组成。 This control circuit 101 is used to adjust the emission intensity of the light source 102, control circuit 101 in which an integrated circuit for dimming to achieve, and the light source 102 may be a cold cathode fluorescent lamp (Cathode Cold Fluorescent Lamp, CCFL) consisting of, or a light emitting diode (Light emitting diode, LED) is composed. 控制电路IOI 依据其所接收的致能信号ES决定是否启动,并于启动时输出脉宽信号P窗, 以驱动光源102开始发光。 The control circuit IOI decide whether to start according to the enable signal ES which it received the output pulse signal P to the window, and when activated to drive the light source 102 starts to emit light. 而于控制电路101启动时,控制电路101依据其所接收的调光信号DS而决定脉宽信号PWM的脉冲宽度,以使光源102依据脉宽信号PWM的脉冲宽度而决定发光的强度。 While starting the control circuit 101, a dimming control circuit 101 based on its received signal DS determines the pulse width and pulse width of the PWM signal, so that the pulse width of the PWM signal based on the pulse width of the light source 102 and the light emission intensity. 当脉宽信号P碰呈现高电位的时间较长时,光源102的导通时间较长, 因此光源102的亮度也较亮。 When the pulse signal P is longer exhibit high potential collision time, the light source 102 on-time is longer, and therefore the brightness of the light source 102 is also bright. 反之,当脉宽信号PWM呈现高电位的时间较短时,光源102的导通时间较短,因此光源102的亮度也较暗。 Conversely, when the PWM signal is a pulse width shorter time exhibit a high potential, the light source 102 is a shorter conduction time, and therefore the brightness of the light source 102 is also dark. 然而,由于控制电路101需要接收致能信号ES与调光信号DS这二种独立的控制信号来操作,因此厂商必须额外提供致能信号ES与调光信号DS给控制电路101使用。 However, since the control circuit 101 needs to receive the enable signal ES dimming signal DS of these two independent control signals to operate, so vendors must provide additional enable signal ES dimming signal to the control circuit 101 uses the DS. 换句话说,厂商必须利用额外的电路去产生致能信号ES 与调光信号DS这二种独立的控制信号,并控制上述二种信号的状态,如此一来不〗又提高了产品的成本,也增加了电路设计的困难度。 In other words, manufacturers have to use additional circuitry to generate an enable signal ES dimming signal DS of these two independent control signals, and controls the state of the two kinds of signals, but also improves the result without〗 cost of the product, also increased the difficulty of circuit design. 发明内容本发明的目的就是提供一种只须接收一种输入信号便可被启动,并据以决定调光程度的驱动装置。 Object of the present invention is to provide a can only receive one input signal is activated, and accordingly determines the dimming level of the drive device. 本发明的再一目的是提供一种可以降低产品成本的驱动装置。 A further object of the present invention is to provide a drive apparatus can reduce product cost. 本发明的叉一目的是提供一种可以降低电路设计困难度的驱动装置。 A fork object of the present invention is to provide a drive apparatus can reduce the difficulty in circuit design. 本发明的更一目的是提供一种具有温度补偿的驱动装置。 A further object of the present invention is to provide a drive apparatus having a compensation temperature. 基于上述及其它目的,本发明提供一种光源的驱动装置,其包括信号处理单元、控制单元、以及驱动单元。 Based on the above and other objects, the present invention provides an apparatus for driving a light source, which includes a signal processing unit, a control unit and a drive unit. 信号处理单元依据输入信号而产生致能信号与调光信号。 The signal processing unit generates the enable signal by input dimming signal. 控制单元具有致能模块与调光模块,其中致能模块依据致能信号启动驱动装置,而调光模块依据调光信号而产生调光驱动信号。 The control unit has a module enable the dimming module, wherein the enable module according to the enable signal to start the drive means, the dimming module generates a dimming signal based dimming driving signal. 驱动单元则依据调光驱动信号而调整光源的发光亮度。 The drive unit according to the drive signal to adjust the dimming of the light source emission luminance. 另外,为达上述的目的,本发明提供一种光源的驱动装置,用以接收调光信号。 Further, to achieve the above object, the present invention provides an apparatus for driving a light source, for receiving a dimming signal. 此驱动装置包括温度补偿元件、控制单元、以及驱动单元。 This drive means comprises a temperature compensating element, a control unit and a drive unit. 其中, 温度补偿元件接收调光信号。 Wherein the temperature compensation element receives a dimming signal. 控制单元具有负调光的调光模块,此调光模块耦接至温度补偿元件,并且依据调光信号而产生调光驱动信号。 The control unit has a negative dimming module dimming, the dimming module coupled to the temperature compensation element, and generates a drive signal based on the dimming dimming signal. 驱动单元依据调光驱动信号,调整光源的发光亮度,其中当环境温度上升时,温度补偿元件调整调光信号,俾使流经光源的电流下降。 The drive unit according dimming driving signal, adjust the emission luminance of the light source, wherein when the ambient temperature rises, the temperature compensation element adjustment dimming signal to enabling the current flowing through the light source decreases. 依照本发明的一实施例所述的驱动装置,上述的信号处理单元依据输入信号的电压电平而产生致能信号与调光信号。 In accordance with an embodiment of the driving apparatus of the embodiment of the present invention, the signal processing unit generates enable signal and a dimming signal depending on the voltage level of the input signal. 依照本发明的一实施例所述的驱动装置,上述的信号处理单元包括第一信号处理电路与第二信号处理电路。 In accordance with the driving apparatus according to an embodiment of the present invention, the signal processing unit comprises a first signal processing circuit and second signal processing circuit. 第一信号处理电路耦接致能模块,用以依据输入信号的电压电平而产生致能信号,且当停止供应输入信号时,维持致能信号预设时间。 First signal processing circuit is coupled to the enable module for generating enabling signal based on the voltage level of the input signal, and when stopping the supply of the input signal, the enable signal a predetermined maintenance time. 第二信号处理电路耦接调光模块,用以依据输入信号的电压电平而产生调光^f言号。 Second signal processing circuit coupled to the dimming module, according to the voltage level of the input signal to generate a dimming ^ f statement number. 依照本发明的一实施例所述的驱动装置,上述的第一信号处理电路包括第一二极管、第一阻抗、第二阻抗、以及第三阻抗。 In accordance with one embodiment of the invention the driving device, said first signal processing circuit comprises a first diode, a first impedance, the second impedance and the third impedance. 第一二极管的阳极接收输入信号。 The anode of the first diode receives an input signal. 第一阻抗耦接于第一二极管的阴极与致能模块之间。 A first impedance coupled between the cathode of the first diode and the enable module. 第二阻抗耦接于第一阻抗与公共电位之间。 A second impedance coupled between the first impedance and the common potential. 而第三阻抗耦接于第一阻抗与公共电位之间。 And the third impedance is coupled between the first impedance and the common potential. 于此实施例中,上述的第一阻抗与第二阻抗皆以电阻来实现,而第三阻抗则以电容来实现。 In this embodiment, the above-described first impedance and the second impedance resistors begin to implement, but places a third impedance of the capacitor is achieved. 依照本发明的一实施例所述的驱动装置,上述的第二信号处理电路包括第四阻抗、第五阻抗、以及第二二极管。 Embodiment of the driving apparatus according to an embodiment of the present invention, said second impedance signal processing circuit comprises a fourth, a fifth impedance, and a second diode. 第四阻抗的其中一端接收输入信号。 Wherein an end of the fourth impedance receive the input signal.

第五阻抗壽馬接于第四阻抗的另一端与7>共电位之间。 And the other end connected to the fifth impedance life horse and fourth impedance 7> between the total potential. 而第二二4及管的阳才及耦接第四阻抗的另一端,而阴极则耦接调光模块。 4 and the male and two second tube and was coupled to the other end of the fourth resistance, and the cathode is coupled to the dimming module. 于此实施例中,上述的第四阻抗与第五阻抗皆以电阻来实现。 In this embodiment, the above-described fourth and fifth impedance to achieve impedance resistor begin. 依照本发明的一卖施例所迷的驱动装置,上迷的输入信号包括直流信号。 In accordance with an embodiment of the driving apparatus of the present invention is sold fan, fan on the input signal comprises a DC signal. 依照本发明的一实施例所述的驱动装置,上述的输入信号包括脉宽信号(PWM),且调光模块更依据脉宽信号的占空比而决定调光驱动信号,以调整光源的发光亮度。 Embodiment of the driving apparatus according to an embodiment of the present invention, said input signal comprises a pulse width signal (the PWM), and according to the duty ratio of the dimming module further determines a pulse width modulated optical signal and a driving signal to adjust the light source brightness. 依照本发明的一实施例所述的驱动装置,上述的温度补偿元件为二极管, 且为上述的第二二极管。 Drive apparatus according to an embodiment of the present invention, the above-described temperature compensation element is a diode and a second diode above. 依照本发明的一实施例所述的驱动装置,上述的温度补偿元件为热敏电阻,且为上述的第五阻抗。 Driving means in accordance to an embodiment of the present invention, the temperature compensation element is a thermistor, and the above-mentioned fifth impedance. 综上所述,本发明因采用信号处理电路去接收输入信号,并使此信号处理电路依据此输入信号的电压电平而产生致能信号与调光信号,因此本发明的驱动装置只须接收一种输入信号便可启动,并且还可据以决定调光的程度。 As described above, because the present invention uses a signal processing circuit to receive an input signal, and the signal processing circuit according to the voltage level of this input signal is generated enable signal and a dimming signal, thus driving apparatus according to the present invention receives only An input signal can start, and may also be determined according to the degree of dimming. 如此一来,厂商便不需利用额外的电路去产生致能信号ES与调光信号DS这二种独立的控制信号,也不需利用上述电路去控制上述二种信号的状态,于是可降低产品的成本,也降低了电路设计的困难度,以及本发明亦可通过温度补偿元件达到温度补偿的功效。 Thus, manufacturers need not use additional circuit will generate an enable signal ES to the dimming signal DS of these two independent control signals, nor do they need to control the state of the circuit using the above two signals, so the product may be reduced cost, but also reduces the difficulty of circuit design, and the efficacy of the present invention can also be reached through the temperature compensating element for temperature compensation. 为让本发明的上述和其它目的、特征和优点能更明显易懂,下文特举较佳实施例,并配合所附图式,作详细说明如下。 To make the above and other objects, features and advantages of the present invention can be more fully understood by reading the following preferred embodiments and accompanying figures, described in detail below. 附图说明图1为已知的控制电路的输入信号示意图。 BRIEF DESCRIPTION OF schematic diagram of the input signal is a known control circuit of FIG. 图2为依照本发明一实施例的驱动装置。 FIG 2 is a driving apparatus according to an embodiment of the present invention. [主要元件标号说明]101:控制电路102、 210:光源220:信号处理单元230:控制单元231:致能模块232:调光模块240:驱动单元250:第一信号处理电路260:第二信号处理电路251、 261: 二极營252、 253、 262、 263:电阻254:电容DDS:调光驱动信号DS:调光信号ES:致能信号GND:公共电位INS:输入信号PWM:脉宽信号具体实施方式图2为依照本发明较佳实施例的驱动装置,用以调整光源210的发光强度。 [Description of Reference Numerals main element] 101: control circuit 102, 210: light source 220: signal processing unit 230: control unit 231: the enable module 232: dimming module 240: driving unit 250: first signal processing circuit 260: second signal processing circuit 251, 261: diode 252 camp, 253, 262, 263: resistance 254: capacitor the DDS: dimming driving signal DS: dimming signal ES: enable signal, GND: the INS common potential: the PWM input signals: pulse width signal DETAILED DESCRIPTION Figure 2 is a driving apparatus according to embodiments of the present invention is preferred to adjust the light emission intensity of the light source 210. 此光源210可以是冷阴极荧光灯,或是发光二极管,还可以是以背光模块的方式呈现的冷阴极萸光灯模块,或是发光二极管模块,甚至是其它种类的发光装置。 This light source 210 may be a cold cathode fluorescent lamp, or light emitting diodes, the backlight module may also be presented by way of a cold cathode dogwood light module or LED module, and even other types of light emitting devices. 本实施例的驱动装置包括信号处理单元220、控制单元230以及驱动单元240。 Drive apparatus according to the present embodiment includes a signal processing unit 220, control unit 230 and driving unit 240. 其中,信号处理单元220依据输入信号INS的电压电平而产生致能信号ES与调光信号DS。 Wherein the signal processing unit 220 according to the voltage level of the input signal INS is generated enable signal ES dimming signal DS. 控制单元230与图1所示的控制电路101的功能相似,其具有致能模块231与调光模块232,其中致能模块231依据致能信号ES启动驱动装置,而调光模块232依据调光信号DS而产生调光驱动信号DDS(于此实施例中,此调光驱动信号DDS为脉宽信号)。 Function control circuit 101 shown in FIG. 1 and the control unit 230 is similar to, the enable module 231 having the dimming module 232, wherein the enable module 231 according to the enable signal ES to start driving device 232 according to the dimming module dimming signal DS generates dimming driving signal DDS (in this embodiment, the dimming pulse signal to the driving signal DDS). 驱动单元240则依据调光驱动信号DDS而调整光源210的发光亮度。 The drive unit 240 based on dimming driving signal DDS to adjust the emission luminance of the light source 210. 上述的信号处理电路220包括第一信号处理电路250与第二信号处理电路260。 The above-described signal processing circuit 220 comprises a first signal processing circuit 250 and the second signal processing circuit 260. 其中,第一信号处理电路250耦接致能模块231,用以依据输入信号INS的电压电平而产生致能信号ES,且当停止供应输入信号INS时,维持致能信号ES预设时间。 Wherein the first signal processing circuit 250 is coupled to the enable module 231, according to the voltage level of the input signal INS is generated enable signal ES, and the supply is stopped when the input signal INS, the enable signal ES to maintain a preset time. 第二信号处理电路260耦接调光模块232,用以依据输入信号INS的电压电平而产生调光信号DS。 Second signal processing circuit 260 coupled to the dimming module 232, according to the voltage level of the input signal INS is generated dimming signal DS. 第一信号处理电路250包括二极管251、第一阻抗、第二阻抗、以及第 First signal processing circuit 250 includes a diode 251, a first impedance, the second impedance, and the second

三阻抗。 Three impedance. 在此实施例中,第一阻抗、第二阻抗分别以电阻252和253来实现, 第三阻抗以电容254实现。 In this embodiment, the first impedance, second impedance resistors 252 and 253, respectively, to be achieved, a third capacitor 254 to achieve impedance. 其中,二极管251的阳极接收输入信号INS。 Wherein the anode receives input signals INS diode 251. 第一阻抗耦接于二极管251的阴极与致能模块231之间。 A first impedance coupled to the cathode of the diode 251 between the enable module 231. 第二阻抗的其中一端耦接致能模块231与第一阻抗,而另一端耦接公共电位GND。 One end of the second impedance is coupled to the enable module 231 and a first impedance, and the other end coupled to a common potential GND. 而第三阻抗则并联于第二阻抗。 And a third impedance to the second impedance are connected in parallel. 第二信号处理电路260包括二极管261、第四阻抗、以及第五阻抗。 Second signal processing circuit 260 includes a diode 261, a fourth impedance and the fifth impedance. 在此实施例中,第四阻抗与第五阻抗分别以电阻262和263来实现。 In this embodiment, the fourth and the fifth impedance to the impedance of resistors 262 and 263, respectively, is achieved. 第四阻抗的其中一端接收输入信号INS。 Wherein one end receiving an input signal INS fourth impedance. 第五阻抗耦接于第四阻抗的另一端与公共电位GND之间。 A fifth impedance coupled between the other end of the fourth impedance and the common potential GND. 而二极管261的阳极耦接第四阻抗的另一端,阴极则耦接调光模块232。 And the anode of diode 261 is coupled to the other end of the fourth impedance, and the cathode is coupled to the dimming module 232. 在说明完本实施例的驱动装置的各组成构件,以及各构件之间的连接关系之后,以下将以输入信号INS为直流信号为例子,来说明此驱动装置的动作方式。 After the completion of the respective constituent members described driving device according to the present embodiment, and a connection relationship among the members, the input signal will be a DC signal INS as an example, this embodiment will be described operation of the driving device. 为求说明的方便,吾等先假设调光模块232为采用负调光的方式进行调光,且致能模块231依据致能信号ES的电压大小决定是否启动驱动装置,以驱动光源210进行发光,而调光模块232依据调光信号DS的电压大小决定调光驱动信号DDS的调光程度。 For convenience of illustration, assume Wudeng dimming module 232 by way of negative dimming for dimming, and the magnitude of the voltage determines the enable module 231 according to the enable signal ES whether to activate driving means to drive the light source 210 emits light , the magnitude of the voltage dimming module 232 according to the dimming signal DS determines a dimming light dimming level of the driving signal DDS. 另外,亦假设调光模块232的启始搡作电压大于致能模块231的启始操作电压。 Further, assume also start dimming module 232 for shoving starting voltage is greater than the enable module 231 to start operating voltage. 若致能信号ES的电压大于致能模块231的启始操作电压,那么驱动装置就会启动。 If the induced voltage signal ES can enable module 231 is greater than the starting voltage operation, the drive means will start. 同样地,若调光信号DS的电压大于调光模块232的启始操作电压,那么调光模块232就可以进行调光。 Similarly, if the voltage is greater than the dimming signal DS dimming module 232 of the start operation voltage, the dimming module 232 can be dimmed. 当输入信号INS供应电压,且电阻253所得到的分压(亦即致能信号ES) 小于致能模块231的启始操作电压,而电阻263所得到的分压(亦即调光信号DS)亦小于调光模块232的启始搡作电压时,驱动装置就会处于关闭的状态且无法进行调光操作。 When the partial pressure (i.e., enable signal ES) input supply voltage signal INS, the resistor 253 and the resultant enable module 231 is less than the starting voltage operation, the resistor 263 and the resulting partial pressure (i.e. dimming signal DS) also when less than the dimming module 232 for shoving starting voltage, the drive means will be in a closed state and can not be dimmed operation. 当输入信号INS供应电压,且调升输入信号INS的电压电平,直到电阻253所得到的分压大于致能模块231的启始操作电压,但电阻263所得到的分压小于调光模块232的启始操作电压时,驱动装置被启动,且驱动单元240 开始驱动光源210进行发光。 When the input supply voltage signal INS, and the raised level of the input voltage signal INS until the resulting voltage dividing resistor 253 is greater than the enable module 231 to initiate the operation voltage, but the resistor 263 resulting partial pressure of less than 232 dimming module the operation starting voltage, the drive means is activated, and the driving unit 240 starts to drive the light source 210 emits light. 然而由于电阻263所得到的分压小于调光模块232的启始操作电压,使得调光模块232尚未被致能,故此时无法产生调光驱动信号DDS。 However, since the resistor 263 is less than the partial pressure resulting dimming module 232 to start the operation voltage, so that the dimming module 232 has not been enabled, so at this time can not produce dimming driving signal DDS. 换句话说,虽然此时驱动装置可以驱动光源210进行发光, 但却无法执行调光功能。 In other words, although at this time the drive means may drive the light source 210 emits light, but can not perform a dimming function.

当输入信号INS供应电压,且调升输入信号INS的电压电平,直到电阻253所得到的分压大于致能模块231的启始操作电压,且电阻263所得到的分压亦大于调光模块232的启始操作电压时,驱动装置被启动,且驱动光源210进行发光。 When the input supply voltage signal INS, and the raised level of the input voltage signal INS until the resulting voltage dividing resistor 253 is greater than the enable module 231 start operating voltage dividing resistors 263 and also larger than the obtained dimming module when the start operation voltage 232, the drive means is activated, and the driving source 210 emits light. 此时,由子电阻263所得到的分压大千调光模块232的启始操作电压,使得调光模块232被致能,故此时调光模块232可以依据其所接收到的调光信号DS的电压大小而调整调光驱动信号DDS的脉冲宽度。 At this time, by the sub-dividing resistors 263 Daqian dimming module 232 obtained starting operation voltage, so that the dimming module 232 is enabled, so at this time the voltage dimming module 232 may be based on a dimming signal it receives a DS adjusting the size of the dimming driving pulse width signal DDS. 换句话说,此时驱动装置不仅可以驱动光源210进行发光,亦可以执行调光功能。 In other words, when the drive means may drive only the light source 210 emits light, you can also perform a dimming function. 由于调光模块232采用负调光的方式进行调光,因此当电阻263所得到的分压越大,调光信号DS的电压就越大,则调光驱动信号DDS呈现高电位的时间就越短,光源210就越暗。 Since the dimming module 232 by way of negative dimming dimming, so when larger, the voltage of the dimming signal DS the larger the voltage dividing resistor 263 obtained driving the dimmer signal high potential DDS exhibits more time short, darker light source 210. 反之,当电阻263所得到的分压越小,调光信号DS的电压就越小,则调光驱动信号DDS呈现高电位的时间就越长,光源210就越亮。 Conversely, when the voltage dividing resistor 263 is smaller resulting voltage dimming signal DS is smaller, the dimming driving signal DDS presentation time longer high potential, the brighter the light source 210. 当输入信号INS停止供应电压时,则整个驱动装置被关闭,因此光源210 自然也被关闭。 When the input signal INS stops supplying a voltage, the entire drive is turned off, so the natural light source 210 is also closed. 虽然上述操作方式是以负调光的调光方式进行描述,然本领域技术人员应当可推知,若调光模块232采用正调光的方式进行调光亦可操作。 While the above operation is negative dimming dimming will be described, however those skilled in the art should be inferred if the dimming module 232 by way of positive dimming may for dimming operation. 所谓正调光,就是当调光信号DS的电压越大,则调光驱动信号DDS呈现高电位的时间就越长,光源210就越亮。 The so-called positive dimming, the dimming voltage is larger when the signal DS, the dimmer driving signal DDS presentation time longer high potential, the brighter the light source 210. 反之,当调光信号DS的电压越小, 则调光驱动信号DDS呈现高电位的时间就越短,光源210就越暗。 Conversely, when the voltage of the dimming signal DS is smaller, the dimming driving signal DDS exhibits a high potential, the shorter the time, the darker the light source 210. 因此,不论调光模块232采用正调光的方式进行调光,或是采用负调光的方式进行调光,只要通过调整输入信号INS的电压大小,就可以决定是否启动驱动装置,以及控制驱动装置是否进行调光,还可以控制驱动装置调光的程度。 Thus, no tone positive optical module 232 by way of dimming for dimming, dimming or negative by way of dimming, as long as the magnitude of the voltage input signal is adjusted by the INS, you can decide whether to activate the drive means, and a control drive whether dimming apparatus, the drive means may also control the degree of dimming. 上述的驱动装置不仅可以应用于输入信号INS为直流信号的情况之下, 若使用者为了因应设计上的实际需要,而将输入信号改采用脉宽信号,此驱动装置也一样可以正确地操作。 Above may be applied not only to the driving means for the INS signal input DC signal under the circumstances, if the user response to the actual needs of the design, and the input signal pulse-width change signal, the drive means also be able to operate correctly. 以下将以输入信号INS为脉宽信号为例子, 来说明此驱动装置的动作方式。 The following will be a pulse-width input signal INS as an example, this embodiment will be described operation of the driving device. 必须事先说明的是,由于输入信号INS是脉宽信号,因此调光模块232 必须能依据脉宽信号的占空比而决定调光的程度。 Must first be noted that, since the input signal is a pulse width signal INS, thus dimming module 232 must be determined based on the degree of the duty ratio of the pulse width of the dimming signal. 另外,为了说明的方便, 吾等先假设调光模块232为采用负调光的方式进行调光,且调光模块232的启始操作电压大于致能模块231的启始操作电压,亦假设当输入信号INS为高逻辑电平时,电阻253与263所得到的分压(也就是致能信号ES与调光信 Further, for convenience of description, assume Wudeng dimming module 232 by way of dimming is negative dimming, dimming module 232 and the operation starting voltage is greater than the enable module 231 to start the operation voltage, is also assumed that when INS input signal at a high logic level, the voltage dividing resistors 253 and 263 is obtained (i.e. enable signal ES dimming channel

号DS的电压)会分别大于致能模块231与调光模块232的启始操作电压。 No. DS is the voltage) will be greater than the operating voltage of the enable module 231,232 and start the dimming module, respectively. 当输入信号INS为脉宽信号且呈现高逻辑电平(也就是输入信号INS供应电压)时,由于电阻253与263所得到的分压分别大于致能模块231与调光模块232的启始搡作电压,因此驱动装置被启动,且可以进行调光。 When the input signal is a pulse width signal INS and exhibits a high logic level (i.e. the supply voltage input signal INS), since the resistor 253 and 263 obtained by dividing enable module 231 are greater than 232 and the start of dimming module shoving operating voltage, the drive means is activated, and can be dimmed. 此时,只要通过调整输入信号INS的占空比,就可以决定调光的程度。 In this case, as long as the duty cycle signal is input by adjusting the INS, we can determine the degree of dimming. 以实际的操作来说,若将输入信号INS呈现高逻辑电平的时间调得越长,则调光驱动信号DDS呈现高逻辑电平的时间就越短,因此光源210就越暗。 In actual operation, the INS if the input signal exhibits a high logic level of the longer transfer time, the light driver signal DDS modulation exhibits a high logic level, the shorter the time, the darker the light source 210. 反之,若将输入信号INS呈现高逻辑电平的时间调得越短,则调光驱动信号DDS呈现高逻辑电平的时间就越长,因此光源210就越亮。 Conversely, if the input signal INS time exhibits a high logic level, the shorter the transfer, the dimming driving signal DDS exhibits a high logic level, the longer the time, the brighter the light source 210 so. 当输入信号为脉宽信号且INS呈现低逻辑电平,电容254就会将在输入信号INS供应电压时所储存的电力,提供给致能模块231以维持驱动装置的启动状态一预设时间,时间长度大约是电阻253与电容254 二者的值的乘积。 When the input signal is a pulse signal INS and exhibits a low logic level, the capacitor 254 will be at the supply voltage input signal INS stored power is supplied to the enable module 231 to start the drive state of the device is maintained a predetermined time, the length of time is approximately a product of both the resistance 253 and the capacitance value of 254. 并且,此时的二极管251用以阻绝由电容254流回输入信号INS的电流,以免电容254通过此路径放完所储存的电力,另外,二极管261则用以阻绝由调光模块232流回输入信号INS的电流,以及由调光模块232流向公共电位GND的电流,使之呈现断路,致使调光模块232不操作。 And, at this time diode 251 to block the current input signal from the capacitor 254 flows back to the INS, the capacitor 254 to prevent complete discharge through this path stored electric power, further, a diode 261 to block the input by the dimming module 232 back into the INS current signal, and current flows from the dimming module 232 common potential GND, so that the insulation is, resulting in dimming module 232 does not operate. 由上述可知,只要适当地调整电容254的放电时间与电容值的大小,就可以使得在输入信号INS呈现低逻辑电平时,致能模块231接收电容254所储存的电力,进而维持驱动装置的启动状态。 From the above, as long as suitably adjusting the discharge time of the capacitor 254 the size of the capacitance value, it may be such that exhibits a low logic level input signal the INS, the enable module 231 receives the capacitor 254 to store electricity, and thus maintain the starting drive means status. 然而,由于调光模块232并没有类似的储能元件可以在此时供应电力,因此在这个时候的调光模块232无法进行调光。 However, since the dimming module 232 and similar energy storage element we can not supply power at this time, thus dimming module 232 at this time can not be dimmed. 另外,若要使驱动装置完全停止操作,只要使输入信号INS持续呈现低逻辑电平(也就是使输入信号INS持续停止供应电压),则电容254 会通过电阻253将所储存的电力全部释放完,使致能信号ES小于启使操作电压,故驱动装置自然就会完全停止。 Further, to completely stop the operation of the driving means, as long as the duration of the input signal INS exhibits a low logic level (i.e. the input signal duration INS stops the supply voltage), the capacitor 254 through the resistor 253 will be the release of all the power stored Ends the enable signal ES that the operating voltage is less than the start, it is naturally completely stopped driving means. 虽然上述操作方式是以负调光的调光方式进行描述,然本领域技术人员应当可推知,若调光模块232采用正调光的方式进行调光亦可操作。 While the above operation is negative dimming dimming will be described, however those skilled in the art should be inferred if the dimming module 232 by way of positive dimming may for dimming operation. 所谓正调光,就是当输入信号INS呈现高逻辑电平的时间越长,则调光驱动信号DDS 呈现高逻辑电平的时间就越长,因此光源210就越亮。 The longer a so-called positive dimming, is longer when the input signal INS exhibits a high logic level, the dimming driving signal DDS exhibits a high logic level, thus the brighter the light source 210. 反之,若输入信号INS 呈现高逻辑电平的时间越短,则调光驱动信号DDS呈现高逻辑电平的时间就越短,因此光源210就越暗。 Conversely, the time when the input signal INS exhibits a high logic level, the shorter, the dimming driving signal DDS exhibits a high logic level, the shorter the time, the darker the light source 210. 此外,在上述的调光模块232采用负调光的方式进行调光的条件下,当调光模块232可以进行调光时,随着周遭的环境温度上升,使得二极管261 的温度也跟着上升,导致二极管261的切入电压(Cut-InVoltage)随之变小, 进而减小二极管261上的跨压,因此使得调光模块232所接收到的电压变大, 致使流过光源21G的电流会变小。 Further, under the conditions employed in the negative mode dimming dimming dimming module 232 described above, when the dimming module 232 may be dimmed, along with the surrounding ambient temperature rises, so the temperature of the diode 261 is also followed rises, resulting in cut-voltage diode 261 (Cut-InVoltage) will be smaller, thus reducing the voltage across the diode 261, so that the dimming module 232 received voltage becomes large, so that the current flowing through the light source 21G to become smaller . 通常光源210(例如,发光二极管模块)在高温时,希望其操作电流可以变小,以延长使用寿命。 Typically light source 210 (e.g., a light emitting diode module) at high temperatures, it is desirable that the operating current can be made small to prolong the service life. 因此,在本实施例中, 二极管261即为温度补偿元件,通过二极管261的特性,当环境温度升高时, 使光源210的操作电流变小,恰可达到温度补偿与延长使用寿命的效果。 Accordingly, in the present embodiment, the diode is the temperature compensation element 261, 261 through diode characteristics, when the ambient temperature increases, so that the operating current source 210 becomes small, the temperature compensation can be achieved just the effect of prolonging lifetime. 另外,于本实施例中,电阻263可为正温度系数的热敏电阻,因此当环境温度升高时,电阻263的阻值上升,进而增加电阻263上的跨压,因此使得调光模块232所接收到的电压变大,致使流过光源210的电流变小,以达到温度补偿的功效。 Further, in the present embodiment, resistor 263 may be a positive temperature coefficient thermistor, and therefore, when the ambient temperature rises, resistor 263 is increased, thereby increasing the voltage across the resistor 263, so that the dimming module 232 the received voltage becomes large, so that the current flowing through the light source 210 becomes smaller, in order to achieve the effect of temperature compensation. 此外,在其它实施例中,当调光模块232为采用正调光的方式进行调光时,电阻263为负温度系数的热敏电阻,因此当环境温度升高时,电阻263的阻值下降,进而减小电阻263上的跨压,因此使得调光模块232所接收到的电压变小,致使流过光源210的电流变小,亦可达到温度补偿的功效。 Further, in other embodiments, when the dimming module 232 to perform dimming using dimming positive manner, resistor 263 is a negative temperature coefficient thermistor, and therefore, when the ambient temperature rises, the resistance of resistor 263 decreases thus the voltage across, so that the resistor 263 decreases the dimming module 232 received voltage becomes smaller, resulting in current flowing through the light source 210 becomes smaller, can achieve the effect of temperature compensation. 综上所述,可通过至少一个温度补偿元件(例如,二极管261或热敏电阻263)与控制单元220的调光模块232相耦接,利用温度补偿元件的温度特性, 达到温度补偿的目的。 In summary, by at least one temperature-compensating element (e.g., a diode or thermistor 261 263) and the control unit 220 of the dimming module 232 is coupled by the temperature characteristics of the temperature compensation element, the purpose of temperature compensation. 值得一提的是,若光源210是冷阴极荧光灯,或是冷阴极焚光灯模块时, 那么驱动单元240中多半包含一个直流转交流转换器(DC to AC Inverter), 以将驱动单元24G所接收的信号转换成冷阴极荧光灯或是冷阴极焚光灯模块所需的交流电源型态以及所需的电压电平。 It is worth mentioning that, if the light source 210 is a cold cathode fluorescent lamp or a cold cathode lamp when burning optical module, the drive unit 240 largely comprises a DC-to-AC converter (DC to AC Inverter), to the drive unit 24G the received signal into a desired cold cathode fluorescent lamp or a cold cathode lamp burning optical module type and the required AC power supply voltage level. 而若光源210是发光二极管或是发光二极管模块,则驱动单元240中多半包含一个直流转直流转换器(DC to DC Converter),以将驱动单元240所接收的信号转换成发光二极管或是发光二极管模块所需的电压电平。 If the light source 210 is a light emitting diode or LED module, the drive unit 240 largely comprises a DC to DC converter (DC to DC Converter), a signal to the driving unit 240 converts the received light-emitting diode or a light emitting diode the voltage level required for the module. 此外,在高阶的驱动装置设计中,使用者更可以将光源210的操作状态反馈至控制单元230,以使控制单元230能依据光源210的操作状态而动态改变调光程度。 Further, in the high-end design of the drive means, the operating state of the user can also be fed back to the light source 210 of the control unit 230, so that the control unit 230 can dynamically change the degree of dimming of the light source 210 based on the operating state. 具体来说,可利用电阻与光源210串联以检测流过光源210 的电流大小,然后将此检测结杲输入至控制单元230,以使控制单元230可稳定地调节光源210的电流大小。 Specifically, the light source 210 can be used in series with the resistor to detect a current flowing through the light source 210, and this detection result is inputted to the control unit 230 Gao, so that the control unit 230 may be stably regulate the magnitude of the current source 210. 当然,前提是控制单元230必须具备此种功能才可。 Of course, that the control unit 230 must have such a feature is available. 另外,使用者可以运用常用的脉冲宽度调制控制芯片来实现上述的控制单元。 Further, the user can use conventional pulse width modulation control chip to achieve the above-described control unit. 在上述实施例的描述中,虽然已经对信号处理电路220的实施方式描绘出了一个可能的型态,但本领域技术人员应该知道,各厂商对于信号处理电路220的设计方式都不一样,因此本发明的应用当不限制子此种可能的型态。 In the above-described embodiments, although the embodiment has been described for the signal processing circuit 220 depicts one possible type, those skilled in the art will be appreciated, the manufacturers are not the same for the signal processing circuit 220 design approach, so when the application of the present invention is not limited to such sub-patterns possible. 换言之,只要是所设计的信号处理电路22Q能够依据其所接收的输入信号的电压电平而产生致能信号与调光信号,且能够在输入信号INS停止供应电压时,维持驱动装置的驱动状态一预设时间,就已经是符合了本发明的精神所在。 In other words, as long as the signal processing circuit is designed capable of generating driving state 22Q enable signal and a dimming signal and the input signal INS can be stopped when the supply voltage, the sustain driving apparatus according to the voltage level of the input signal it receives a preset time, it is already in line with the spirit of the invention. 综上所述,本发明因采用信号处理电路去接收输入信号,并使此信号处理电路依据此输入信号的电压电平而产生致能信号与调光信号,因此本发明的驱动装置只须接收一种输入信号便可启动,并且还可据以决定调光的程度。 As described above, because the present invention uses a signal processing circuit to receive an input signal, and the signal processing circuit according to the voltage level of this input signal is generated enable signal and a dimming signal, thus driving apparatus according to the present invention receives only An input signal can start, and may also be determined according to the degree of dimming. 如此一来,厂商便不需利用额外的电路去产生致能信号ES与调光信号DS这二种独立的控制信号,也不需利用上述电路去控制上述二种信号的状态,于是可降低产品的成本,也降低了电路设计的困难度,以及本发明亦可通过温度补偿元件达到温度4卜偿的功效。 Thus, manufacturers need not use additional circuit will generate an enable signal ES to the dimming signal DS of these two independent control signals, nor do they need to control the state of the circuit using the above two signals, so the product may be reduced cost, but also reduces the difficulty of circuit design, and the efficacy of the present invention may also 4 through the temperature compensating element reaches a temperature compensation of the BU. 虽然本发明已以较佳实施例揭露如上,然其并非用以限定本发明,任何本领域技术人员,在不脱离本发明的精神和范围内,当可作些许的更动与润饰,因此本发明的保护范围当视所附的权利要求范围所界定者为准。 Although the invention has been described by reference to preferred embodiments, they are not intended to limit the present invention, anyone skilled in the art, without departing from the spirit and scope of the present invention, may make various modifications and variations, so this range and their equivalents depending on the scope of the invention as claimed in the appended claims.

Claims (20)

1.一种光源的驱动装置,用以接收输入信号,包括: 信号处理单元,依据该输入信号,而产生致能信号与调光信号; 控制单元,具有致能模块与调光模块,该致能模块依据该致能信号启动该驱动装置,该调光模块依据该调光信号产生调光驱动信号;以及驱动单元,依据该调光驱动信号,调整该光源的发光亮度。 A light source driving means for receiving an input signal, comprising: a signal processing unit, according to the input signal, generates enable signal and a dimming signal; a control unit, and the enable module having a dimming module, the actuator enabling module according to the enable signal to start the drive means, the dimming module generates dimming driving signal according to the dimming signal; and a drive unit, according to the dimming driving signal to adjust the emission luminance of the light source.
2. 根据权利要求1所述的光源的驱动装置,其中该信号处理单元依据该输入信号的电压电平,产生该致能信号与该调光信号。 2. The light source driving apparatus according to claim 1, wherein the signal processing unit on the voltage level of the input signal, generates the actuation signal to the dimming signal.
3. 根据权利要求2所述的光源的驱动装置,其中该信号处理单元包括: 第一信号处理电路,耦接该致能模块,用以依据该输入信号的电压电平而产生该致能信号,且当停止供应该输入信号时,维持该致能信号预设时间; 以及第二信号处理电路,耦接该调光模块,用以依据该输入信号的电压电平而产生该调光信号。 3. The light source driving apparatus according to claim 2, wherein the signal processing unit comprises: a first signal processing circuit, coupled to the enable signal is generated based on the voltage level of the input signal connected to the enable module for and when stopping the supply of the input signal, a sustain signal to the actuator predetermined time; and a second signal processing circuit, coupled to the dimming module, according to the voltage level of the input signal to generate the modulated optical signal.
4. 根据权利要求3所述的光源的驱动装置,其中该第一信号处理电路包括:第一二;f及管,其阳极接收该输入信号; 第一阻抗,耦接于该第一二极管的阴极与该致能模块之间; 第二阻抗,耦接于该第一阻抗与公共电位之间;以及第三阻抗,耦接于该第一阻抗与该公共电位之间。 4. The light source driving apparatus according to claim 3, wherein the first signal processing circuit comprising: a first two; F and tube, an anode for receiving the input signal; a first impedance coupled to the first diode between the cathode tube and the enable module; a second impedance coupled between the first impedance and the common potential; and a third impedance, coupled between the first impedance and the common potential.
5. 根据权利要求4所述的光源的驱动装置,其中该第一阻抗与该第二阻抗分别为电阻,该第三阻抗为电容。 The light source driving apparatus according to claim 4, wherein the first impedance and the second impedance resistor respectively, the third impedance is a capacitance.
6. 根据权利要求3所述的光源的驱动装置,其中该第二信号处理电路包括:第四阻抗,该第四阻抗的其中一端接收该输入信号;第五阻抗,耦接于该第四阻抗的另一端与该公共电位之间;以及第二二极管,其阳极耦接该第四阻抗的另一端,其阴极耦接该调光模块。 6. The light source driving apparatus according to claim 3, wherein the second signal processing circuit comprising: a fourth impedance, wherein an end of the fourth impedance is receiving the input signal; fifth impedance coupled to the fourth impedance between the other terminal and the common potential; and a second diode having an anode coupled to the other end of the fourth impedance and a cathode coupled to the dimming module.
7. 根据权利要求6所述的光源的驱动装置,其中该第四阻抗与该第五阻抗各为电阻。 7. The light source driving apparatus according to claim 6, wherein the fourth impedance to the impedance of each of the fifth resistor.
8. 根据权利要求6所述的光源的驱动装置,其中该第五阻抗为热敏电阻。 8. The light source driving apparatus according to claim 6, wherein the fifth impedance is a thermistor.
9. 根据权利要求8所述的光源的驱动装置,其中该调光模块采用负调光的方式进行调光,且该热敏电阻为正温度系数的热敏电阻。 9. The light source driving apparatus according to claim 8, wherein the dimming module by way of negative dimming for dimming, and the thermistor is a positive temperature coefficient thermistor.
10. 根据权利要求8所述的光源的驱动装置,其中该调光模块采用正调光的方式进行调光,且该热敏电阻为负温度系数的热敏电阻。 10. The light source driving apparatus according to claim 8, wherein the dimming module using positive mode dimming for dimming, and the thermistor is a negative temperature coefficient thermistor.
11. 根据权利要求1所述的光源的驱动装置,其中该光源包括冷阴极荧光灯。 11. The light source driving apparatus according to claim 1, wherein the light source comprises a cold cathode fluorescent lamp.
12. 根据权利要求1所述的光源的驱动装置,其中该光源包括发光二极管。 12. The light source driving apparatus according to claim 1, wherein the light source comprises a light emitting diode.
13. 根据权利要求1所述的光源的驱动装置,其中该输入信号包括直流信号。 13. The light source driving apparatus according to claim 1, wherein the input signal comprises a DC signal.
14. 根据权利要求1所述的光源的驱动装置,其中该输入信号包括脉宽信号,且该调光模块还依据该脉宽信号的占空比而决定该调光驱动信号,以调整该光源的发光亮度。 14. A light source driving apparatus according to claim 1, wherein the input signal comprises a pulse width signal, and the dimmer module is further based on the duty ratio of the PWM signal and determining the dimming driving signals, to adjust the light source the emission luminance.
15. 根据权利要求1所述的光源的驱动装置,其中该控制单元包括脉冲宽度调制控制芯片。 15. The light source driving apparatus according to claim 1, wherein the control unit comprises a pulse width modulation control chip.
16. 根据权利要求1所述的光源的驱动装置,其中该信号处理单元具有温度补偿元件,其是耦接该调光模块,当环境温度上升时,调整该调光信号, 使流经该光源的电流下降。 16. The light source driving apparatus according to claim 1, wherein the signal processing unit having a temperature compensating element, which is coupled to the dimming module, when the ambient temperature rises, adjusting the dimming signal, flowing through the light source the current decline.
17. —种光源的驱动装置,用以接收调光信号,包括: 温度补偿元件,接收该调光信号;控制单元,具有负调光的调光模块,该负调光的调光模块耦接该温度补偿元件,且依据该调光信号产生调光驱动信号;以及驱动单元,依据该调光驱动信号,调整该光源的发光亮度,其中当环境温度上升时,该温度补偿元件调整该调光信号,俾使流经该光源的电流下降。 17 - the seed light source drive means for receiving a dimming signal, comprising: a temperature compensation element, receives the dimming signal; a control unit having a negative dimming module dimming, the dimming module coupled negative dimming the temperature compensation element, and generates a dimming driving signal according to the dimming signal; and a drive unit, according to the dimming driving signal, adjust the emission luminance of the light source, wherein when the ambient temperature rises, the temperature compensation element to adjust the dimming signal, a current flowing through the light source decreases Bishi.
18. 根据权利要求17所述的光源的驱动装置,其中该温度补偿元件为二极管。 18. The light source driving apparatus according to claim 17, wherein the temperature compensation element is a diode.
19. 根据权利要求17所述的光源的驱动装置,其中该温度补偿元件为热敏电阻。 19. The light source driving apparatus according to claim 17, wherein the temperature compensation element is a thermistor.
20. 根据权利要求17所述的光源的驱动装置,其中调光信号为直流信号或脉宽信号。 20. The light source driving apparatus according to claim 17, wherein the dimming signal is a DC signal or pulse signal.
CN 200610154388 2006-09-25 2006-09-25 Light source driving device CN101155453A (en)

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Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101835299A (en) * 2009-03-13 2010-09-15 上海飞锐光电科技有限公司 Drive control circuit of LED fluorescent exciting light sources
CN101959346A (en) * 2009-07-14 2011-01-26 艾沃特有限公司 Adaptive dimmer detection and control for LED lamp
CN102169672A (en) * 2011-03-19 2011-08-31 中华映管股份有限公司 Backlight module, over-temperature protective circuit and over-temperature protective method
CN102625515A (en) * 2011-01-31 2012-08-01 中强光电股份有限公司 Light emitting diode drive device, method thereof and applied light source system thereof
CN103945601A (en) * 2013-01-23 2014-07-23 英飞凌科技奥地利有限公司 LED driver circuit
CN104320885A (en) * 2014-11-04 2015-01-28 茅于海 Temperature compensation type LED lamp drive circuit

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101835299A (en) * 2009-03-13 2010-09-15 上海飞锐光电科技有限公司 Drive control circuit of LED fluorescent exciting light sources
CN101835299B (en) 2009-03-13 2013-07-31 青岛海泰镀膜技术有限公司 Drive control circuit of LED fluorescent exciting light sources
CN101959346A (en) * 2009-07-14 2011-01-26 艾沃特有限公司 Adaptive dimmer detection and control for LED lamp
CN101959346B (en) 2009-07-14 2014-06-04 戴乐格半导体公司 Adaptive dimmer detection and control for LED lamp
CN102625515A (en) * 2011-01-31 2012-08-01 中强光电股份有限公司 Light emitting diode drive device, method thereof and applied light source system thereof
CN102169672A (en) * 2011-03-19 2011-08-31 中华映管股份有限公司 Backlight module, over-temperature protective circuit and over-temperature protective method
CN102169672B (en) 2011-03-19 2014-02-26 福州华映视讯有限公司 Backlight module, over-temperature protective circuit and over-temperature protective method
CN103945601A (en) * 2013-01-23 2014-07-23 英飞凌科技奥地利有限公司 LED driver circuit
CN103945601B (en) * 2013-01-23 2016-12-07 英飞凌科技奥地利有限公司 Led driver circuit
CN104320885A (en) * 2014-11-04 2015-01-28 茅于海 Temperature compensation type LED lamp drive circuit
CN104320885B (en) * 2014-11-04 2016-08-24 北京埃菲莱光电科技有限公司 Temperature compensation led lamp driver circuit

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