Power cord edge signal triggered displacement device and LED driver
A technology of edge signal and shifting device, which is applied in the field of circuits, can solve the problems of not being able to use power lines, only power lines, ground lines, and controlling LEDs, etc., and achieve the effect of monolithic integration
Active Publication Date: 2015-07-15
HANGZHOU YUN LED CHIP PHOTOELECTRICITY TECH CO LTD
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Problems solved by technology
[0005] Existing control devices based on the above protocol can obtain various color effects by controlling the duty cycle of red, green, and blue LEDs, but all need to transmit control signals through more than one signal line, and cannot control LEDs through power lines. It cannot be applied to products with only power wires and ground wires
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[0031] The present invention will be further described in detail with reference to the accompanying drawings and specific embodiments.
[0032] like figure 1 As shown (the part shown in the dotted line box), the shifting device triggered by the edge signal of the power line of the present embodiment includes:
[0033] The edge-triggered shift unit is triggered by the edge signal of the power line to shift and output the shift result;
[0034] The charging unit is used to provide a power supply level for the edge trigger shift 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;
[0035] The initialization unit is configured to initialize the edge-triggered shift unit according to the power supply level.
[0036] figure 2 It is the edge trigger shift unit of this embodiment, the edge trigger shift unit is actually an edge shift unit, and the edge shift unit includes 3 D flip-fl...
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The invention discloses a power cord edge signal triggered displacement device and an LED driver. The displacement device comprises an edge triggered displacement unit, a charging unit and an initializing unit, wherein the charging unit provides a power supply level for the edge triggered displacement unit according to an edge signal input by a power cord; the initializing unit initializes the edge triggered displacement unit according to the power supply level. The LED driver comprises the power cord edge signal triggered displacement device, and a driving unit for driving an LED according to a displacement result of the power cord edge signal triggered displacement device. The power cord edge signal triggered displacement device displaces the edge signal input by the power cord to achieve control over the driving unit so as to drive the LED to complete colorful light emission, only one power cord and a ground wire are needed, and an additional signal wire is not needed, so that integration of an LED driver chip in a circuit can be easily achieved.
Description
technical field [0001] The invention relates to the field of circuit technology, in particular to a shift device and an LED driver triggered by an edge signal of a power line. Background technique [0002] Light-emitting diodes (Light Emitting Diode, LED) are widely used in architectural lighting, automobile head and tail lights, landscape lights, festival lights, etc. LED has significant advantages such as high efficiency, good directionality, good color stability, high reliability, long life, small size and high environmental safety, and is especially suitable for landscape lighting and festival lighting. The red, green, and blue three-color LEDs can be controlled in seven or more colors through the control device, so that the LED lamps can present a wonderful and beautiful scene. The control device is a key part of the LED decorative lighting system. [0003] In recent years, LED control methods based on DMX512 protocol, DALI protocol, and return-to-zero code protocol ha...
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Login to View More IPC IPC(8): H05B37/02
CPCY02B20/40
Inventor 罗小华
Owner HANGZHOU YUN LED CHIP PHOTOELECTRICITY TECH CO LTD