LED light emitting device and related driving circuit
A technology of LED device and driving circuit, applied in lighting device, electric lamp circuit arrangement, light source, etc., can solve the problem of reducing the overall energy use efficiency of LED light-emitting device, and achieve the effect of improving luminous efficacy and overall energy use efficiency
Inactive Publication Date: 2017-01-04
RICHTEK TECH
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Problems solved by technology
In this way, it not only reduces the overall energy efficiency of the LED lighting device, but also generates more unnecessary waste heat
Method used
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Embodiment Construction
[0032] Embodiments of the present invention will be described below in conjunction with related drawings. In the drawings, the same reference numerals represent the same or similar elements or method flows.
[0033] figure 1 and figure 2 It is a simplified functional block diagram of the LED lighting device 100 according to a first embodiment of the present invention. Such as figure 1 and figure 2 As shown, the LED lighting device 100 includes a rectifier (rectifier) 110, multiple parallel LED arrays (LED array), multiple parallel switch arrays (switch array), and multiple parallel drive circuits. For convenience of explanation, in figure 1 and figure 2 Only a first LED array 120a, a second LED array 120b, a third LED array 120c, a first switch array 130a, a second switch array 130b, a third switch array 130c, a first drive The circuit 140a, a second driving circuit 140b, and a third driving circuit 140c are taken as examples.
[0034] The rectifier 110 is configu...
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The invention provides an LED light emitting device and a related driving circuit. The driving circuit comprises the components of a signal pin; a determining circuit which is used for determining the amplitude of an input signal; an indicating signal generating circuit which is used for outputting an indicating signal to the signal pin according to the determining result of the determining circuit; an aligning signal generating circuit which is used for generating an aligning signal when triggered by a preset edge of a signal on the signal pin; an indicating signal detecting circuit which is used for detecting the signal on the signal pin for generating a detecting signal; and a control signal generating circuit which is used for generating a plurality of control signals according to the detecting signal when triggered by the aligning signal, thereby controlling a plurality of switch elements which are parallelly connected with a plurality of LED devices. The driving circuit can effectively improve light emitting efficiency and integral energy utilization efficiency of the LED light emitting device.
Description
technical field [0001] The present invention relates to an LED light emitting device, in particular to a driving circuit capable of improving the luminous efficiency of the LED light emitting device and the related LED light emitting device. Background technique [0002] In order to increase the luminous power, some LED lighting devices adopt a structure in which multiple driving circuits are connected in parallel to respectively drive multiple sets of LED arrays. Ideally, multiple driving circuits connected in parallel should switch control signals synchronously so as to maximize the luminous power of the LED lighting device. [0003] However, it is inevitable that there will be process variation among the driving circuits, and the operations of different driving circuits are performed independently of each other. Therefore, in a conventional LED lighting device, multiple driving circuits connected in parallel often do not switch control signals at the same time, thus redu...
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Login to View More IPC IPC(8): H05B37/02
CPCY02B20/40
Inventor 潘均宏饶东铮李一惟陈曜洲
Owner RICHTEK TECH