Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Method and apparatus for protecting electro dynamic transducer from heat overload

A transducer and dynamic technology, applied in transducer circuits, sensor protection circuits, sensors, etc., can solve the problem of speaker device returning to the furnace

Inactive Publication Date: 2013-05-15
TEXAS INSTR INC
View PDF0 Cites 13 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, damage to the loudspeaker in a compact unit can cause the entire unit to be returned to the furnace

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Method and apparatus for protecting electro dynamic transducer from heat overload
  • Method and apparatus for protecting electro dynamic transducer from heat overload
  • Method and apparatus for protecting electro dynamic transducer from heat overload

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0017] The drawings and description generally disclose a method for protecting an electrodynamic transducer, such as a speaker, from thermal overload. As part of the method, an estimate of the temperature of a voice coil in the electrodynamic transducer is obtained while measuring the power of an input audio signal. After obtaining an estimate of the temperature and measuring the power of the input audio signal, the power of the audio input signal is reduced when a power limit and / or a temperature limit is exceeded.

[0018] figure 1 is a cross-sectional view of an electrodynamic transducer 100 (prior art). The electrodynamic transducer can be used in cellular phones, electronic boards, laptop computers, desktop computers, televisions, monitors, portable radios, portable music playback systems, PDAs, and media players. In this example of electrodynamic transducer 100 , voice coil 111 is located in the magnetic field of magnetic gap 105 . The voice coil 111 is physically at...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention relates a method and apparatus for protecting electro dynamic transducer from heat overload. In an embodiment of the invention, the voice coil of an electro dynamic transducer is protected by measuring the power of the input audio signal. When a predetermined power limit is reached by the input audio signal, the power of the input audio signal is reduced.

Description

[0001] Cross References to Related Applications [0002] This application is related to application serial number xx / xxxxxx (TI-71350) entitled "Thermal Control of Voice Coils in Loudspeakers" and application titled "Overexcursion for Loudspeakers" Protection (Over-excursion Protection for Loudspeakers)" with serial number xx / xxxxxx (TI-70802), filed together on the same date and incorporated by reference for all disclosures herein In this article. technical field [0003] The present invention relates to electrodynamic transducers and devices comprising said electrodynamic transducers and methods of protecting such devices. Background technique [0004] Speakers used in compact and portable devices require significant design compromises that can result in sub-optimal sound quality and volume. Speakers used in compact devices (eg, cellular phones, electronic boards, laptop computers, PDAs (Personal Digital Assistants), media players, etc.) are typically small. Consequent...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): H04R3/00
CPCH03G11/00H04R3/007H03G11/008
Inventor 拉尔斯·里斯博米林德·阿尼尔·博尔卡尔泰斯·布赫瓦尔德·克里斯琴森温迪安姆·费尔南德·戴维·特拉奥雷
Owner TEXAS INSTR INC
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com