Light-emitting device and control method

Abstract

The invention relates to a light emitting device and a control method, comprising: a light emitting unit, a constant current driving circuit, and a controller; at least two light emitting units are connected in series to the constant current driving circuit, and the light emitting unit includes a light emitting branch and a bypass branch , the light-emitting branch and the bypass branch are connected in parallel, there is a light emitter on the light-emitting branch, there is a switch on the bypass branch, the switch has a signal input terminal, the controller has a signal output terminal, and the signal input terminal is connected to the signal output terminal, The controller is used to control the on and off of the switch. Using a single constant current drive power supply to supply power to multiple light emitters has a simple structure and is easy to control. By controlling light emitters with different light colors, the light emitting devices can be precisely controlled to present different colors.

Description

technical field [0001] The invention relates to a light emitting device and a control method. Background technique [0002] Existing LED lamps use a drive power supply and a string of LED lamp beads, all of which have the same brightness, and cannot individually control the brightness of a single lamp bead to achieve a mixed light effect. In order to achieve the effect of mixing light, so that the combination of different light color lamp beads emits different colors, it is necessary to use multiple driving power supplies to match multiple lamp beads. Each driving power supply only drives one lamp bead, resulting in redundant equipment and multiple power supplies. The calorific value is large. When there are more lamp beads that need to be dimmed, the greater the calorific value, which restricts the development of mixed light of LED lamps and causes energy waste. Contents of the invention [0003] Based on this, the present invention discloses a light emitting device that...

AI Technical Summary

Problems solved by technology

[0002] Existing LED lamps use a drive power supply and a string of LED lamp beads, all of which have the same brightness, and cannot individually control the brightness of a single lamp bead to achieve a mixed light effect

In order to achieve the effect of mixing light, so that the combination of different light color lamp beads emits different colors, it is necessary to use multiple driving power supplies to match multiple lamp beads. Each driving power supply only drives one lamp bead, resulting in redundant equipment and multiple power supplies. The heat generation is large. When there are more lamp beads that need to be dimmed, the heat generation will be greater, which restricts the development of mixed light of LED lights and causes energy waste.

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