Claims (8)
一種動態選擇發光二極體工作數量之交流驅動裝置，係應用於驅動包含至少一發光二極體之一燈串，其包含：一整流電路，係接收一交流電壓，且將該交流電壓轉換成一脈動直流電壓；複數個峰值電壓判斷電路，係與該整流電路連接，各該峰值電壓判斷電路具有一預設電壓值，該預設電壓值係由該交流電壓整流後所提取之峰值來決定；複數個開關電路，係與該燈串之一個或多個該至少一發光二極體併聯，其動作為藉由該複數個峰值電壓判斷電路之控制，以決定與之併聯的一個或多個該至少一發光二極體之導通或不導通；以及一恆流電路，係跨接於該整流電路與該燈串之間，在該燈串導通時提供穩定的電流；其中，當輸入之該交流電壓改變時，該複數個峰值電壓判斷電路判斷該整流電路所得之一電壓峰值是否低於該預設電壓值時，使與該複數個開關電路併聯之該至少一發光二極體不導通，以調整該燈串的該至少一發光二極體工作數量的方式，調整該燈串的總導通角度，使得總導通週期與該至少一發光二極體工作數量的乘積為固定值，進而減少因該交流電源電壓之變化所引起的總發光量變化。
An AC driving device for dynamically selecting the working quantity of a light emitting diode is used for driving a light string including at least one light emitting diode, comprising: a rectifying circuit for receiving an alternating current voltage and converting the alternating current voltage into one a pulsating DC voltage; a plurality of peak voltage judging circuits are connected to the rectifying circuit, wherein each of the peak voltage judging circuits has a predetermined voltage value, wherein the preset voltage value is determined by a peak value obtained by rectifying the AC voltage; a plurality of switching circuits connected in parallel with one or more of the at least one light emitting diodes of the string, the action being controlled by the plurality of peak voltage judging circuits to determine one or more of the parallel And at least one of the light-emitting diodes is turned on or off; and a constant current circuit is connected between the rectifier circuit and the light string to provide a stable current when the light string is turned on; wherein, when the current is input When the voltage is changed, the plurality of peak voltage determination circuits determine whether a voltage peak of the rectifier circuit is lower than the preset voltage value, and the plurality of switches are The at least one light emitting diode connected in parallel with the circuit is not turned on, and the total conduction angle of the light string is adjusted in such a manner as to adjust the working quantity of the at least one light emitting diode of the light string, so that the total conduction period and the at least one light emitting second The product of the number of pole body operations is a fixed value, thereby reducing the total amount of luminescence caused by the change in the AC power supply voltage.
如申請專利範圍第1項所述之動態選擇發光二極體工作數量之交
流驅動裝置，其中該整流電路係為一橋式整流器。
For example, the number of dynamic selection of light-emitting diodes as described in item 1 of the patent application scope
The flow drive device, wherein the rectifier circuit is a bridge rectifier.
如申請專利範圍第1項所述之動態選擇發光二極體工作數量之交流驅動裝置，其中該複數個預設電壓值係分別作為各該峰值電壓判斷電路的判斷依據，當整流後所得該脈動直流電壓之該電壓峰值低於其中一該複數個預設電壓值時，其對應之該峰值電壓判斷電路產生訊號，使對應之該開關電路導通，以便減少該燈串之該至少一發光二極體工作數量。
The AC driving device for dynamically selecting the working quantity of the LEDs according to the first aspect of the invention, wherein the plurality of preset voltage values are respectively used as a basis for determining the peak voltage judging circuit, and the pulsation is obtained after rectification. When the voltage peak of the DC voltage is lower than one of the plurality of predetermined voltage values, the corresponding peak voltage determining circuit generates a signal, so that the corresponding switching circuit is turned on, so as to reduce the at least one light emitting diode of the light string. The amount of physical work.
如申請專利範圍第1項所述之動態選擇發光二極體工作數量之交流驅動裝置，其中該複數個預設電壓值係分別作為各該峰值電壓判斷電路的判斷依據，當整流後所得該脈動直流電壓之該電壓峰值高於其中一該複數個預設電壓值時，其對應之該峰值電壓判斷電路產生訊號，使對應之該開關電路不導通，以便增加該燈串之該至少一發光二極體工作數量。
The AC driving device for dynamically selecting the working quantity of the LEDs according to the first aspect of the invention, wherein the plurality of preset voltage values are respectively used as a basis for determining the peak voltage judging circuit, and the pulsation is obtained after rectification. When the voltage peak of the DC voltage is higher than one of the plurality of preset voltage values, the corresponding peak voltage determining circuit generates a signal, so that the corresponding switching circuit is not turned on, so as to increase the at least one light emission of the light string. The number of polar work.
如申請專利範圍第1項所述之動態選擇發光二極體工作數量之交流驅動裝置，其中該複數個開關電路係由雙接面電晶體所構成。
An AC drive device for dynamically selecting the number of operating diodes according to claim 1, wherein the plurality of switch circuits are formed by double junction transistors.
如申請專利範圍第1項所述之動態選擇發光二極體工作數量之交流驅動裝置，其中該複數個峰值電壓判斷電路係包含由雙接面電晶體、場效電晶體與運算放大器結合電阻、二極體與電容建立之一比較器電路，或以微處理器與監控程式所構成。
The AC drive device for dynamically selecting the number of working diodes according to the first aspect of the invention, wherein the plurality of peak voltage judging circuits comprise a double junction transistor, a field effect transistor and an operational amplifier combined with a resistor, The diode and the capacitor establish a comparator circuit, or a microprocessor and a monitoring program.
如申請專利範圍第1項所述之動態選擇發光二極體工作數量之交流驅動裝置，其中該動態選擇發光二極體工作數量係由複數個之該複數個峰值電壓判斷電路所構成，在大範圍的交流電壓變化時，以調整該燈串的導通週期，進而穩定整體該燈串導通週期與該至少一發光二極體工作數量的乘積。
The AC driving device for dynamically selecting the working quantity of the light emitting diode according to the first aspect of the patent application, wherein the dynamic selection light emitting diode working quantity is composed of a plurality of the plurality of peak voltage determining circuits, When the range of the AC voltage changes, the conduction period of the string is adjusted to further stabilize the product of the overall conduction period of the string and the number of operations of the at least one LED.
如申請專利範圍第1項所述之動態選擇發光二極體工作數量之交
流驅動裝置，當該交流驅動裝置在該交流電壓變動時，藉由使用該複數個峰值判斷電路與該複數個開關電路之搭配，以調整該燈串之該至少一發光二極體之工作數量與總導通之角度，進而固定該至少一發光二極體工作數量與總導通角度之乘積值，而穩定該燈串之總發光量。
For example, the number of dynamic selection of light-emitting diodes as described in item 1 of the patent application scope
a flow driving device, when the AC driving device changes, the number of working of the at least one light emitting diode of the light string is adjusted by using a plurality of peak determining circuits and the plurality of switching circuits And the total conduction angle, thereby fixing the product of the working quantity of the at least one LED and the total conduction angle, and stabilizing the total amount of illumination of the string.