LED multi-pixel-point driving system

A point-driven, multi-pixel technology, applied in the field of LED multi-pixel point driving systems, can solve the problems of large line loss and voltage drop of lamps, large scale of lamps, and small number of lights, so as to solve the problem of large line loss and voltage drop and reduce costs. , the effect of downsizing

Pending Publication Date: 2017-12-19
ZHEJIANG JINGRI LIGHTING TECH
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Problems solved by technology

[0009] Aiming at the problems existing in the prior art, the present invention proposes an LED multi-pixel driving syste...

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  • LED multi-pixel-point driving system
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  • LED multi-pixel-point driving system

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Embodiment Construction

[0030] The following are specific embodiments of the present invention and in conjunction with the accompanying drawings, the technical solutions of the present invention are further described, but the present invention is not limited to these embodiments.

[0031] figure 1 It shows the existing LED multi-pixel control method. The existing driving system includes a constant voltage power supply, multiple pixel channels and a driving circuit, and each pixel channel includes an LED lamp connected in series, a constant current circuit and a switching circuit. When controlling dot-matrix LED pixels, it is necessary to establish multiple pixel channels, and multi-channel constant current circuits and switching circuits are required. In this way, the lamps equipped with the driving system need a large space capacity and a large number of devices, so the scale of the lamps is large and the production cost is low. very high.

[0032] For this reason, the present invention proposes an...

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Abstract

The invention discloses an LED multi-pixel-point driving system, and belongs to the technical field of LED illumination. The system comprises a power supply, a constant current driving circuit, a pixel point circuit, a plurality of switching circuits and a driving control circuit; the pixel point circuit consists of multiple LED lamps connected in series; each of the multiple switching circuits is connected to the two ends of one or more LED lamps in the pixel point circuit in parallel, and each switching circuit is also connected with the driving control circuit separately; the power supply is connected with the constant current driving circuit and the pixel point circuit in sequence, wherein each switching circuit comprises a switching MOS transistor or a switching triode or a switching device with the equivalent function; and the driving control circuit is a circuit for realizing open-circuit output of the collector of the switching triode or open-circuit output of the drain of the switching MOS transistor. The LED multi-pixel-point driving system is simple in structure and capable of greatly simplifying system scale and lowering production cost.

Description

technical field [0001] The invention relates to the technical field of LED lighting, in particular to an LED multi-pixel driving system. Background technique [0002] At present, with the increasing requirements for night scene lighting, the requirements for the expressiveness of lighting effects are also increasing. One pixel of an LED lamp can independently express any color in a full color. The more pixels, the more delicate the picture can be expressed. Therefore, at present, pixel requirements are also proposed for lamps. [0003] The existing LED multi-pixel control method basically adopts parallel connection, such as figure 1 As shown, each channel of each pixel is an independently controlled unit, and LEDs need to be driven in a constant current mode. The existing LED multi-pixel schemes are all powered by a low-voltage constant-voltage power supply. Each conventional circuit Each channel of the pixel uses a constant current circuit and a switching circuit. When t...

Claims

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Application Information

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IPC IPC(8): H05B33/08H05B44/00
CPCH05B45/00H05B45/37
Inventor 程世友范俊杰闵霞徐伟英
Owner ZHEJIANG JINGRI LIGHTING TECH
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