Lamp and control device thereof

Abstract

The invention discloses a lamp and a control device thereof. The control device of the lamp comprises a ballasting module, a switch control module and a controller. The ballasting module comprises a half-bridge driving unit provided with a first triode and a second triode. The output end of the switch control module is connected with the base electrode of the first or second triode. The controller is connected with the input end of the switch control module and used for outputting control signals to the switch control module. The switch control module generates switch control signals according to the control signals to control the first or second triode in the half-bridge driving unit so as to control the ballasting module to be switched on and off. Due to the fact that the output function of the ballasting module is controlled to be enabled and disenabled by controlling the base electrode signals of one triode in the ballasting module, the switch function is achieved; in addition, the control device is simple in structure, beneficial to reduction of the circuit cost, easy to assemble, capable of achieving product miniaturization conveniently and high in reliability.

Description

technical field [0001] The invention relates to the technical field of lighting lamps, in particular to a control device for a lamp and a lamp with the control device. Background technique [0002] At present, the most commonly used electronic ballasts are self-excited electronic ballasts. This type of ballast is relatively cheap and has mature and reliable performance, but it has a single function. It only provides the driving function of the lamp tube and the necessary protection function without a switch. Function. [0003] The existing scheme of using a self-excited electronic ballast plus a control module to realize the switching function has the following working principle: the control of the switching function is achieved by adding different control modules. This scheme uses a separate control circuit to supply power to the self-excited electronic ballasts respectively by controlling relays or thyristors, so as to achieve the purpose of controlling the expansion of t...

AI Technical Summary

Problems solved by technology

[0005] 1. A relay or thyristor, a controller, and a low-voltage power supply with strong drive capability for driving the relay and the controller are used, and the cost is high;

[0006] 2. If a relay is used, since the relay is a mechanical action electronic device, its service life is far less than that of ordinary electronic components, and the electronic ballast is a non-resistive load, which will accelerate the shortening of its service life

If a thyristor is used for control, because it is high-voltage control, the reliability and life of the components cannot be guaranteed. At the same time, an additional power supply needs to be added. Due to the relationship between cost and installation volume, most of them adopt the resistance-capacitance step-down method. Poor reliability;

[0007] 3. The whole system is composed of two independent modules such as the control module and the self-excited electronic ballast, all of which are installed on the chassis of the lamp and connected by connecting wires. The arrangement of itself on the chassis and the connection between the modules The connection makes the assembly process complicated, and the assembly process will also lead to unqualified parameters such as EMC, power factor, harmonics, etc., which is not conducive to product consistency.

[0008] To sum up, the cost of this solution is high, different relays and related circuits need to be designed for different power and types of controlled circuits, and the manufacturability and reliability are poor.

Images