WO2016054848A1 - Dispositif de comptage de signaux de crête et pilote de diode électroluminescente - Google Patents

Dispositif de comptage de signaux de crête et pilote de diode électroluminescente Download PDF

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Publication number
WO2016054848A1
WO2016054848A1 PCT/CN2014/089967 CN2014089967W WO2016054848A1 WO 2016054848 A1 WO2016054848 A1 WO 2016054848A1 CN 2014089967 W CN2014089967 W CN 2014089967W WO 2016054848 A1 WO2016054848 A1 WO 2016054848A1
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WIPO (PCT)
Prior art keywords
edge
unit
counting
edge signal
flip
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PCT/CN2014/089967
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English (en)
Chinese (zh)
Inventor
罗小华
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罗小华
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Application filed by 罗小华 filed Critical 罗小华
Priority to CN201480031528.3A priority Critical patent/CN105493628B/zh
Publication of WO2016054848A1 publication Critical patent/WO2016054848A1/fr

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Classifications

    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B45/00—Circuit arrangements for operating light-emitting diodes [LED]
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B47/00—Circuit arrangements for operating light sources in general, i.e. where the type of light source is not relevant
    • H05B47/10—Controlling the light source

Definitions

  • the present invention relates to the field of circuit technologies, and in particular, to an edge signal counting device and an LED driver.
  • LED Light Emitting Diode
  • the control unit can realize the control of seven colors or more colors, so that the LED lamps can display a wonderful and colorful scene, and the control device is a key part of the LED lighting system.
  • the DMX512 protocol was first developed by the American Theater Association in 1985, and the physical layer was designed using RS-485. Transceiver, the bus uses a pair of twisted pairs to connect the dimming station to the dimmer. RS-485 adopts balanced transmission and differential reception, which has high receiving sensitivity and strong anti-interference ability, and the signal transmission distance can reach kilometers.
  • DMX512 The protocol uses digital technology to achieve the brightness adjustment of the dimming device.
  • the protocol has strict regulations on the data format and physical layer of the lighting console information, providing a standard interface for lighting control. Thanks to DMX512 The protocol has broad applicability and is quickly adopted by manufacturers and users around the world. Almost all lighting consoles and controlled devices are compatible with the DMX512 protocol standard.
  • DALI is a lighting control bus solution proposed by Europe. It is an open asynchronous serial digital communication protocol for lighting system control. DALI The system adopts a master-slave structure, and the system can connect up to 64 Each slave module uses a unique individual identification address, which is set at system initialization. The address of the slave module can be modified according to requirements during use.
  • the present invention provides an edge signal counting device and an LED driver.
  • An edge signal counting device includes:
  • the edge counting unit is configured to count the edge of the edge signal input by the power line, and output the counting result
  • the charging unit is configured to provide a power supply level for the edge counting unit and the initializing unit according to the edge signal input by the power line, charge when the edge signal is high level, and discharge when the edge signal is low level;
  • an initializing unit configured to initialize the edge counting unit according to the power supply level.
  • the respective functional units in the edge signal counting device of the present invention can be integrated into a counting chip.
  • an arbitrary number can be set for the edge counting unit, which is set as needed, and is usually set to "zero" (ie, cleared).
  • the charging unit When the power line signal is at a high level, the charging unit is charged, and when the level provided by the charging unit reaches a high level, the edge counting unit and the initializing unit are successfully powered on.
  • the duration of the low level of the edge signal must be less than the time required for the power supply level of the charging unit to decrease from a high level to a low level.
  • the edge counting unit includes a plurality of D flip-flops connected in series, for each D The output of the trigger outputs the count result, where:
  • the clock signal input of the first D flip-flop is connected to the power line, and the next two D flip-flops, the latter D
  • the clock signal input end of the flip-flop is connected to the inverted output end of the previous D flip-flop
  • each D flip-flop is connected to the initialization unit, and the inverted output end of each D flip-flop is connected to the trigger end.
  • the first D flip-flop refers to the D flip-flop corresponding to the lowest bit in the counting unit.
  • Two adjacent D The trigger has a relatively low D flip-flop as the previous one and a relatively high D flip-flop as the latter.
  • the D flip-flop can be either a rising edge or a falling edge, which can be selected according to the needs.
  • said edge counting unit comprises at least two D flip-flops connected in series. Further preferably, the edge counting unit comprises 3 to 100 A series of D flip-flops.
  • the charging unit comprises a diode, an anode of the diode is connected to a power line, a cathode is grounded through an energy storage element, and the charging unit supplies a power supply level to the edge counting unit and the initialization unit through a cathode of the diode.
  • the charging unit includes an NPN transistor, the NPN The collector and base of the triode are connected to the power line, and the emitter is grounded through an energy storage element.
  • the charging unit supplies the power level through the emitter edge counting unit and the initialization unit of the NPN transistor.
  • the charging unit includes a PNP transistor, the PNP
  • the collector and the base of the triode are connected and grounded through an energy storage element, and the emitter is connected to the power line, and the charging unit passes the PNP.
  • the collector or base of the triode provides the supply level for the edge counting unit and the initialization unit.
  • An energy storage component is to be understood as an electronic component that can be charged and discharged.
  • the energy storage component is a charging capacitor or MOS Tube. Since the charging capacitor is not compatible with the conventional CMOS process, it is possible to use a MOS transistor that is compatible with the CMOS process as an equivalent capacitor as an energy storage component for integration. When using a MOS transistor, The source and drain of the MOS transistor are shorted to form an equivalent capacitor.
  • the invention also provides an LED
  • the driver includes the above-described edge signal counting means, and a driving unit for driving the LED based on the counting result of the edge signal counting means.
  • the drive unit can be implemented with existing LED drive circuits depending on the drive needs.
  • the edge signal counting device is used to control the driving unit by counting the edge signals input from the power line to drive the LEDs.
  • Complete the colorful illumination only need one power line and ground line, no need for additional signal lines, which is beneficial to the chip integration of the LED driver.
  • 1 is a structural block diagram of an LED driver of the embodiment
  • FIG. 2 is a circuit schematic diagram of an edge counting unit of the embodiment
  • FIG. 3 is a circuit schematic diagram of a charging unit of the embodiment
  • Fig. 5 is a timing chart of the edge signal counting device of the embodiment.
  • the edge signal counting device of this embodiment includes:
  • the edge counting unit is configured to count the edge of the edge signal input by the power line, and output the counting result
  • the charging unit is configured to provide a power supply level for the edge counting unit and the initializing unit according to the edge signal input by the power line, charge when the edge signal is high level, and discharge when the edge signal is low level;
  • an initializing unit configured to initialize the edge counting unit according to the power supply level.
  • the edge counting unit includes three D flip-flops, which are a first D flip-flop F1, a second D flip-flop F2, and a third D flip-flop. F3, the corresponding output terminals are Q1, Q2 and Q3 respectively, and the corresponding counting results are Q1, Q2, Q3 from low to high.
  • the clock signal input terminal CK1 of the first D flip-flop is connected to the power line, and the reverse output terminal QB1 and the second of the first D flip-flop
  • the clock signal input terminal CK2 of the D flip-flop is connected, and the reverse output terminal QB2 of the second D flip-flop is connected with the clock signal input terminal CK3 of the third D flip-flop;
  • Reset end of each D flip-flop (including reset terminal RD1, reset terminal RD2, and reset terminal RD3) ) is connected to the initialization unit, and the reverse output is connected to the trigger terminal (ie, the reverse output terminal QB1 is connected to the trigger terminal D1, the reverse output terminal QB2 is connected to the trigger terminal D2, and the reverse output terminal is connected to the trigger terminal D3). ).
  • the rising edge of the clock with a low level reset is selected to trigger the D flip-flop, and the rising edge of the edge signal is counted.
  • the charging unit 3 is a specific circuit of the charging unit of the embodiment, including a diode D and a diode D
  • the anode is connected to the power line, and the cathode is grounded through an energy storage element C (in this embodiment, the charging capacitor is a MOS tube equivalent capacitor shorted by source and drain, and the equivalent capacitor has a size of 0.2 ⁇ F).
  • the charging capacitor is a MOS tube equivalent capacitor shorted by source and drain, and the equivalent capacitor has a size of 0.2 ⁇ F).
  • the entire charging unit passes through the diode
  • the cathode of D provides the power supply level for the edge counting unit and the initialization unit.
  • Figure 4 is a schematic diagram of the initialization unit, including four MOS transistors, respectively p-channel MOS transistors T1, p Channel MOS transistor T2, n-channel MOS transistor T3 and p-channel MOS transistor T4, first inverter V1, and second inverter V2.
  • the specific connection relationship is as follows:
  • the source and drain of MOS transistor T1 are connected to the cathode of diode D1 in the charging unit, gate and MOS transistor T3
  • the drain connection, the gate of MOS transistor T3 is connected to the source of MOS transistor T1, and the source of MOS transistor T3 is grounded.
  • the gate and source of MOS transistor T2 are respectively connected to MOS transistor T1
  • the gate and the source are connected, and the drain is connected in series with a current limiting resistor R (the current limiting resistor is 500 ⁇ in this embodiment), connected to the gate of the MOS transistor T4, and the MOS transistor T4
  • the drain and source are connected to the source and ground of MOS transistor T3, respectively.
  • the gate of the MOS transistor T4 is connected to the input terminal of the first inverter V1, and the output of the first inverter V1 is connected to the second inverter V2.
  • the output of the second inverter V2 serves as an output terminal of the initialization unit to output a reset signal to the edge counting unit.
  • the power supply level provided by the charging unit is low level, and at this time, the initialization unit and the edge counting unit are insufficiently powered, and the entire counting device cannot count.
  • the energy storage element C in the charging unit Being charged.
  • the power supply level is flipped from a low level to a high level, and the initialization unit and the edge counting unit are normally powered.
  • the MOS transistor T3 in the initialization unit is turned on, so that the MOS transistor T2 Turning on, therefore, the charging unit can charge the MOS transistor T4 used as a capacitor through the current limiting resistor R.
  • MOS transistor T4 The voltage of the gate gradually increases, and initialization is completed when the charging reaches such that the reset signal output from the second inverter V2 is turned from a low level to a high level.
  • the output of the second inverter V2 is connected to the reset terminal of each D flip-flop in the edge counting unit, and the second inverter V2 When the output is low, each D flip-flop is reset, that is, the edge count unit is cleared.
  • the edge signal of the power line input, and the timing diagram of the initialization unit and the counting result at this time are as shown in FIG. 5.
  • the count results are represented by the output signals of the forward outputs of the three D flip-flops. After the power is turned on, the three D flip-flops are reset to logic 0 at time T, that is, the count result is cleared.
  • the counting result On the rising edge of the edge signal At E1, the counting result is 001; on the rising edge of the power line E2, the counting result is 010; on the rising edge of the power line E3, the counting result is 011; on the rising edge of the power line E4, the counting result is 100; on the rising edge of the power line E5, the counting result is 101; on the rising edge of the power line E6, the counting result is 110; on the rising edge of the power line E7, the counting result is 111 On the rising edge of the power line E8, the counting device overflows and the counting result is 000.
  • the duration of the low level in the edge signal must be less than the discharge duration of the energy storage element C in the charging unit from the high level to the low level.
  • the charging capacitor does not reverse discharge the power line during discharge.
  • the voltage amplitude corresponding to the high level is 3.0 ⁇ 5V, and the low level is less than 1.0V.
  • the edge signal counting device can be used to control the LED drive unit for color control, such as for red, green and blue tri-color LEDs. With the lantern control, the edge control signal can be sent only through the power line to achieve seven-color control.
  • the LED driver used is shown in Figure 1. As shown, the above-described edge signal counting means, and a driving unit for driving the LED in accordance with the counting result of the edge signal counting means are provided.
  • the drive unit can be implemented by using existing LED drive circuits.
  • the input interface of the LED drive unit matches the input interface of the counting device.
  • the driver uses only one power line input edge signal to count the edge signals, so that the control drive unit drives the seven-color illumination of the LEDs, eliminating the need to use more than one signal line to transmit control signals.

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  • Led Devices (AREA)
  • Control Of El Displays (AREA)

Abstract

Cette invention concerne un dispositif de comptage de signaux de crête et un pilote de DEL. Ledit dispositif de comptage de signaux de crête comprend : une unité de comptage de crêtes conçue pour compter les crêtes d'un signal de crête délivré en entrée par un câble d'alimentation et pour émettre en sortie un résultat de décompte ; une unité de charge qui alimente l'unité de comptage de crêtes et une unité d'initialisation. Quand le signal du câble d'alimentation est fort, une opération de charge est effectuée. Quand le signal du câble d'alimentation est faible, une opération de décharge est effectuée. Ledit dispositif comprend en outre une unité d'initialisation conçue pour initialiser l'unité de comptage de crêtes en fonction du niveau de puissance. Ledit pilote de DEL comprend un dispositif de comptage de signaux de crête et une unité pilote conçue pour piloter la DEL en fonction du dispositif de comptage de signaux de crête. L'invention met en œuvre un dispositif de comptage de signaux de crête, ce qui permet de compter le signal de crête délivré en entrée par le câble d'alimentation de façon à commander l'unité pilote et piloter de ce fait la DEL de sorte à ce qu'elle émette une lumière colorée. Seul un câble d'alimentation et une mise à la masse sont nécessaires. Aucun câble de signalisation supplémentaire n'est requis, ce qui présente un avantage pour le circuit mettant en œuvre la puce pilote de DEL.
PCT/CN2014/089967 2014-10-10 2014-10-31 Dispositif de comptage de signaux de crête et pilote de diode électroluminescente WO2016054848A1 (fr)

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Application Number Priority Date Filing Date Title
CN201480031528.3A CN105493628B (zh) 2014-10-10 2014-10-31 边沿信号计数装置及led驱动器

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CN201420584724.0U CN204180343U (zh) 2014-10-10 2014-10-10 边沿信号计数装置及led驱动器
CN201420584724.0 2014-10-10

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Families Citing this family (5)

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Publication number Priority date Publication date Assignee Title
WO2016054970A1 (fr) * 2014-10-10 2016-04-14 罗小华 Dispositif de calcul et pilote de diode électroluminescente déclenché par signal de crête de câble d'alimentation
CN204180343U (zh) * 2014-10-10 2015-02-25 罗小华 边沿信号计数装置及led驱动器
CN104507218B (zh) * 2014-12-15 2017-03-15 罗小华 基于电源线边沿信号控制的彩灯装置
US11737185B2 (en) 2020-08-19 2023-08-22 Jiangsu Caihuixin Electronic Technology Co., Ltd. LED control system using modulated signal
CN112087839B (zh) * 2020-08-28 2022-09-06 杭州昀芯光电科技有限公司 一种带电平时长计数的电源线边沿信号触发的运算装置

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CN104053283A (zh) * 2014-06-20 2014-09-17 陕西亚成微电子股份有限公司 一种led调光控制电路

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EP2330870A1 (fr) * 2009-08-28 2011-06-08 Freescale Semiconductor, Inc. Dispositif de déclenchement d'échantillonnage et procédé correspondant
JP5708371B2 (ja) * 2010-10-28 2015-04-30 ミツミ電機株式会社 照明用電源装置および保持電流の制御方法
CN204180343U (zh) * 2014-10-10 2015-02-25 罗小华 边沿信号计数装置及led驱动器

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CN103095855A (zh) * 2011-10-27 2013-05-08 无锡力芯微电子股份有限公司 I2c通信接口装置
CN104053283A (zh) * 2014-06-20 2014-09-17 陕西亚成微电子股份有限公司 一种led调光控制电路

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CN105493628A (zh) 2016-04-13
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