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Power transmission control device, power transmission device, electronic instrument, and non-contact power transmission system

A technology of control devices and power receiving devices, applied in the direction of electromagnetic wave systems, etc., to achieve the effect of simple structure, strong interference resistance of power supply voltage, etc., and less deviation

Inactive Publication Date: 2008-12-31
SEIKO EPSON CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, there is a difficult problem of properly detecting the load state on the power receiving side.

Method used

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  • Power transmission control device, power transmission device, electronic instrument, and non-contact power transmission system
  • Power transmission control device, power transmission device, electronic instrument, and non-contact power transmission system
  • Power transmission control device, power transmission device, electronic instrument, and non-contact power transmission system

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Experimental program
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Embodiment Construction

[0053] Preferred embodiments of the present invention will be described in detail below. In addition, the embodiments described below do not unreasonably limit the content of the present invention described in the claims, and not all the configurations described in the present embodiments are essential technical features of the present invention.

[0054] 1. Electronic equipment

[0055] figure 1 (A) shows an example of electronic equipment to which the non-contact power transmission method of this embodiment is applied. A charger 500 (cradle, cradle) as one of electronic devices has a power transmission device 10 . In addition, a mobile phone 510 as one of electronic devices has a power receiving device 40 . Furthermore, mobile phone 510 has a display unit 512 such as an LCD, an operation unit 514 including buttons and the like, a microphone 516 (voice input unit), a speaker 518 (voice output unit), and an antenna 520 .

[0056] In charger 500 , electric power is supplied...

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PUM

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Abstract

The invention provides a power transmission control device and power transmission device which cna properly measure the load state of the receiving side. The power transmission control device provided in the power transmission device of a non-contact power transmission system includes a drive clock signal generation circuit that generates a drive clock signal, a driver control circuit that generates a driver control signal based on the drive clock signal, a waveform detection circuit, and a control circuit. The waveform detection circuit includes a pulse width detection circuit that measures a first pulse width period to detect first pulse width information, the first pulse width period being a period between a first edge timing of the drive clock signal and a first timing, the first timing being a timing when a first induced voltage signal that has changed from a low-potential-side power supply voltage exceeds a first threshold voltage. The control circuit detects the power-reception-side load state based on the first pulse width information.

Description

technical field [0001] The invention relates to a power transmission control device, a power transmission device, electronic equipment and a non-contact power transmission system. Background technique [0002] In recent years, non-contact power transmission (non-contact power transmission), which can transmit power by electromagnetic induction even if there is no contact between metal parts, has attracted attention. As application examples of this non-contact power transmission, charging of mobile phones and home electric appliances (for example, handsets of telephones), etc. have been proposed. [0003] Patent Document 1 is a prior art of contactless power transmission. In this patent document 1, data transmission from a power receiving device (secondary side) to a power transmitting device (primary side) is realized by so-called load modulation. Furthermore, the power transmission device detects a change in the load state on the power receiving side (secondary side) acco...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J17/00
Inventor 饭坂健神干基
Owner SEIKO EPSON CORP