Power conservation type driving mechanism of semiconductor luminous component

A technology for driving devices and light-emitting components, applied in lighting devices, electroluminescent light sources, light sources, etc., can solve problems such as energy consumption

Active Publication Date: 2009-10-28
MACROBLOCK INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0011] As for another known pulse width modulation (PWM, pulse width modulation) driving IC, although it can also provide a constant current to drive the LED, it still has the disadvantage of consuming energy.

Method used

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  • Power conservation type driving mechanism of semiconductor luminous component
  • Power conservation type driving mechanism of semiconductor luminous component
  • Power conservation type driving mechanism of semiconductor luminous component

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0030] Preferred embodiments of the present invention are described in detail below with reference to the drawings.

[0031] figure 1 It is a typical LED driver IC chip, and its output / input ports connected to package pins usually include power supply current input port (VCC), multiple LED control output ports, ground current output port (GND) and integration of adjustment control output current Circuit current output port (REXT).

[0032] A resistor (Rext) is externally connected to the integrated circuit current output port (REXT) to form a basic current source. The current of the basic current source is amplified several times by the internal circuit, and then output to the corresponding control output port connected to the cathode of each series-connected LED, and the anode of each series-connected LED is commonly connected to a certain voltage source (V_LED); thereby, You can turn on and control the brightness of the LED. As shown in the figure, the current flowing thr...

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PUM

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Abstract

The present invention provides a power-saving drive device for semiconductor light-emitting components, which is characterized in that it includes a power-saving unit directly or indirectly coupled between the power supply current input port and the control output port, such as a sampling / storage unit that can store and stabilize voltage. Hold (sample & hold) circuit. Through the design of the present invention, the power supply current input port only needs to input the same current as the traditional driving device in a period of time, and a lower current can be input in other periods of time, so as to achieve the effect of power saving.

Description

technical field [0001] The invention relates to a power-saving driving device of a semiconductor light-emitting component, in particular to a power-saving driving device suitable for LEDs. Background technique [0002] Generally speaking, the current flowing through the LED is a fixed current (I_LED), and the LED driving integrated circuit (IC, integrated circuit) is used to provide a mechanism for generating the fixed current (I_LED). LED driver ICs usually include a basic current source formed by a fixed potential and a specific resistance, and then generate I_LED through a stable current (I_REXT) flowing through an external resistor and multiple current mirrors. Among them, I_LED has a multiple relationship with I_REXT: [0003] I_LED=M_TOTAL×I_REXT [0004] Among them, M_total is the current mirror multiple. However, the basic current source and current mirror need to use a large current, resulting in an increase in overall power consumption. Take a single driver int...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H05B33/08H05B44/00
Inventor 王弘宗
Owner MACROBLOCK INC
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