LED lamp and brightness adjusting module and adjusting method of LED lamp
A technology of LED lamps and brightness adjustment, which is applied in the direction of electrical components, etc., can solve the problems of uneven brightness adjustment, large changes in LED lamp light, and affect the audience's visual experience, so as to improve the visual experience and smooth the brightness adjustment.
Inactive Publication Date: 2020-06-23
SHENZHEN EX LIGHTING TECH HLDG
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Problems solved by technology
However, when there is a large difference between the initial brightness before the brightness adjustment of the LED lamp and the adjusted target brightness, or when the time interval between two consecutive brightness adjustments is short, the light of the LED lamp changes greatly, resulting in jitter in the light change. The adjustment is not smooth, which affects the audience's visual experience
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[0042] The present application will be described in further detail below in conjunction with the accompanying drawings and specific embodiments. It should be understood that the following exemplary embodiments and descriptions are only used to explain the present invention, not as a limitation to the present invention, and, in the case of no conflict, the embodiments in the application and the features in the embodiments can be combined with each other .
[0043] like figure 1 As shown, the embodiment of the present invention provides a brightness adjustment module 10 of an LED lamp 1, which is connected to an LED light source module 12 and an external signal source 3. The brightness adjustment module 10 includes:
[0044] The target grayscale decoding unit 101 is connected to the external signal source 3, and is used to decode the external dimming signal input by the external signal source 3 to obtain the target grayscale value of the LED lamp 1 under the target brightness; ...
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The embodiment of the invention provides an LED lamp and a brightness adjusting module and an adjusting method of the LED lamp. The brightness adjusting module is connected with an LED light source module and an external signal source, and comprises a target gray level decoding unit used for decoding an external dimming signal to obtain a target gray level value under the target brightness of theLED lamp; a transition point insertion unit used for sequentially and uniformly inserting a preset number of brightness change transition points between a pre-stored initial gray level value corresponding to the initial brightness of the LED lamp and the target gray level value, and calculating a transition gray value of each brightness change transition point; a PWM output unit used for sequentially outputting PWM signals with corresponding duty ratios according to the target gray level value, the transition gray value and a first data table; and a driving unit used for determining and sequentially outputting driving current with corresponding preset magnitude to an LED light source module according to the duty ratios of the PWM signals and a second data table reflecting the correspondingrelationship between the duty ratios of the PWM signals and the driving current. According to the embodiment, smooth transition of brightness can be ensured.
Description
technical field [0001] The embodiments of the present invention relate to the technical field of LED lamps, in particular to an LED lamp, a brightness adjustment module and an adjustment method for the LED lamp. Background technique [0002] The brightness adjustment system of the traditional LED landscape lamps currently mainly uses the DMX512 control system to adjust the brightness of the lamps, and the lamp controller sends brightness adjustment signals to the LED lamps to achieve brightness adjustment. However, when there is a large difference between the initial brightness before the brightness adjustment of the LED lamp and the adjusted target brightness, or when the time interval between two consecutive brightness adjustments is short, the light of the LED lamp changes greatly, resulting in jitter in the light change. The adjustment is not smooth, which affects the audience's visual experience. Contents of the invention [0003] The technical problem to be solved b...
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Inventor 胡松松邓利卫刘明宇康海明
Owner SHENZHEN EX LIGHTING TECH HLDG