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lamp circuit

A technology of circuits and lamps, which is applied to the layout of electric lamp circuits, electric light sources, lighting devices, etc., can solve the problems of power loss, damage, and energy consumption of resistors 832, etc., and achieve the goal of reducing waste heat output and energy consumption Effect

Inactive Publication Date: 2016-08-24
SUNONWEALTH ELECTRIC MACHINE IND
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, when the DC fan 81 of the conventional lamp circuit 8 fails or is abnormal, although the power supplied by the DC power supply V to the DC LED assembly 82 can be reduced, energy will still be consumed in the resistor 832.
Therefore, not only cannot save power loss when the brightness of the LED assembly 82 is reduced, but also may cause the resistor 832 to generate high temperature due to the current passing through the failed shunt assembly 83, thereby destroying the DC fan 81 or the LED assembly 82. element

Method used

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Embodiment approach

[0049] Please refer to Figure 4 and 5 As shown, it is a second implementation manner of the current regulating unit 4 of this embodiment. Compared with the aforementioned first embodiment, the current regulation unit 4 of this embodiment is still provided with the first resistor 43 and the second resistor 44, but is based on an n-channel transistor 47 and an inverter 48 Instead of the third resistor 45 . Specifically, the n-channel transistor 47 has an input terminal 471, an output terminal 472 and an activation terminal 473, wherein the input terminal 471 is connected to the second point resistor 44, the output terminal 472 is grounded, and the activation terminal 473 is for the signal receiving end 41 to be connected through the inverter 48 . Thereby, when the cooling unit 3 is in normal operation and the state detection pin 33 outputs the low-level signal as the state signal, the state signal is converted by the inverter 48 and sent to the n-channel The actuation termi...

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Abstract

The invention provides a lamp circuit. The lamp circuit comprises a power IC component, a light emitting unit, a heat dissipating unit and a current regulation unit, wherein the power IC component is used for receiving direct-current power and generating constant direct-current power and is provided with a signal feedback end; the light emitting unit is connected with the power IC component so as to receive the constant direct-current power; the heat dissipating unit is connected with the power IC component or the light emitting unit so as to receive the constant direct-current power; the heat dissipating unit is provided with a state detection pin which can output a state signal according to the operation state of the heat dissipating unit; and the current regulation unit is connected between the state detection pin and the signal feedback end and can change the resistance value between the control end and a ground point according to the state signal. Therefore, the lamp circuit not only has a fault prompt function but also can achieve the effects of reducing the waste heat output and reducing the energy consumption.

Description

technical field [0001] The invention relates to a lamp circuit, in particular to a lamp circuit which can change brightness and reduce energy consumption when the heat dissipation fan is abnormal or faulty. Background technique [0002] Please refer to figure 1 As shown, it is a lamp circuit structure diagram of the patent case of Taiwan Patent Publication No. 200904259 "Heat Dissipation Protection Device for LED Lighting Module", which discloses that an existing lamp circuit 8 has a DC fan 81 and a light emitting diode assembly 82 And a failure shunt component 83 . The DC fan 81 , the LED assembly 82 and the failure shunt assembly 83 are connected in parallel and connected to a DC power supply V together. The DC fan 81 has a state detection pin 811, so as to output a status signal according to the operating state of the DC fan 81; the light emitting diode assembly 82 is composed of several light emitting diodes 821 connected in series; the failure shunt assembly 83 has a ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H05B37/03H05B37/02
Inventor 郭启宏柯立勇任敦麟
Owner SUNONWEALTH ELECTRIC MACHINE IND