led lighting dimming device and vehicle
A technology of LED lighting and dimming device, applied in the field of vehicles, can solve the problems of power supply fluctuation, inflexible dimming, and high cost, and achieve the effects of improving driving ability, strong anti-interference, and wide dimming range
Active Publication Date: 2019-07-26
扬州比亚迪半导体有限公司
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Problems solved by technology
[0004] However, the switch detection circuit is prone to malfunction due to the influence of power fluctuations, especially when there are many devices connected to the power supply or there are large inductive devices. It is judged as a valid signal; moreover, the counter is generally an edge-triggered addition / subtraction counter, which usually counts the number of rising edges / falling edges of the power switch pulse to realize the counting operation, and the counter needs to be cleared before changing the dimming signal / Set the number, and then restart counting for a cycle, the logic control circuit can obtain an effective dimming control signal, and the dimming is not flexible enough
In addition, adopting the above structure requires the use of fast switch detection circuits, counters, etc., and the dimming signal acquisition circuit is complex and costly
Method used
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[0017] Embodiments of the present invention are described in detail below, examples of which are shown in the drawings, wherein the same or similar reference numerals designate the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the figures are exemplary and are intended to explain the present invention and should not be construed as limiting the present invention.
[0018] The following describes an LED lighting dimming device and a vehicle including the dimming device according to an embodiment of the present invention with reference to the accompanying drawings.
[0019] figure 1 is a block diagram of an LED lighting dimming device according to an embodiment of the present invention, such as figure 1 As shown, the LED lighting dimming device 100 includes a power supply module 10 , an LED driving module 20 , a PWM generation module 40 , a modulation module 50 and a demodulation module 60 ....
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The invention discloses an LED lighting dimming device, which comprises: a power supply module, an LED driving module, a PWM generating module, a modulating module and a demodulating module. Among them, the power supply module outputs a power signal, which is transmitted to the LED driver module through the power transmission line, and the LED driver module drives the LED load for lighting; the PWM generation module is used to generate the PWM dimming signal; the modulation module is used to adjust the PWM dimming signal Modulate, and load the PWM modulation signal to the power transmission line; the demodulation module is used to demodulate the PWM modulation signal on the power transmission line to obtain the PWM dimming signal, and the LED driver module performs the LED load according to the PWM dimming signal Dimming. The LED lighting dimming device has simple structure and flexible dimming. The invention also discloses a vehicle using the LED lighting dimming device.
Description
technical field [0001] The invention belongs to the technical field of vehicles, and in particular relates to an LED (Light Emitting Diode, light emitting diode) lighting dimming device and a vehicle including the LED lighting dimming device. Background technique [0002] Compared with traditional lamps, LED lighting has significant energy saving and emission reduction effects, so it has become the first choice for new energy vehicle lighting. In order to further increase the cruising range of new energy vehicles, it is necessary to dim LED lights for different application scenarios. [0003] In the related art, a light-adjusting circuit through a power switch is proposed. The circuit consists of a power grid, a power switch, a main circuit, a fast switch detection circuit, a counter, a logic control circuit, a current control loop and an LED load. The main principle is: through the fast switch detection circuit to detect the number of power switch actions, and output the r...
Claims
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IPC IPC(8): H05B33/08H05B44/00
CPCH05B45/10
Inventor 刘娟
Owner 扬州比亚迪半导体有限公司