Power saving circuit for display

Abstract

The power saving circuit for display includes following parts: rectification part for rectifying input AC power source; secondary loop of transformer for supplying power source for the rectification part according to winding ratio; first and second rectifying and filtering parts for rectifying and filtering power source at secondary loop; driving part in first power saving mode controls Vcc1 output of first DC power source rectified and filtered by the first rectifying and filtering part based on signal DPM1 in first power saving mode; driving part in second power saving mode controls Vcc2 output of second DC power source rectified and filtered by the second rectifying and filtering part based on driven by the driving part in first power saving mode said above. As one driving part in power saving mode is acted, the other driving parts in power saving mode are operated automatically. Advantages are: minimum fittings of circuit, lowered cost and convenience for design.

Description

technical field [0001] The present invention relates to a power-saving circuit for a display, and more specifically, to a power-saving circuit for a display that can reduce costs and improve design convenience through an efficient power-saving circuit structure. Background technique [0002] Generally, in order to reduce the unnecessary power consumption of the display, if the user does not use the personal computer for a certain period of time, the system microcomputer of the display controls the DPM (Display Power Management: Display Power Management) mode of the power saving mode (Power Save Mode). The input voltage of the secondary circuit of the transformer (Power Trans) becomes smaller (Down). [0003] Nowadays, there is an increasing demand for power saving such as this, and not only cost reduction but also reduction of IC's own consumption voltage is required. [0004] Such as figure 1 As shown, the power-saving circuit of the display using the prior art includes: ...

AI Technical Summary

Problems solved by technology

[0013] However, since a plurality of power-saving mode drive units applying the power-saving circuit of the display of the prior art need to input power-saving signals separately to perform power-saving operations, in order to form such a power-saving mode drive unit, it is necessary to add a lot of accessories.

Therefore, constituting such a power-saving circuit has the problems of increasing the cost and occupying a lot of PCB (Printed Circuit Board: printed circuit board) space.

This is contrary to today's trend of demanding cost reduction, and there is a problem of reducing the price competitive advantage

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