Large dynamic even force driving bar-shaped plate loudspeaker

Abstract

A large dynamic bar type plate loudspeaker driven by uniform force mainly applies to large-screen LCD, plasma and its acoustics of flat-plate TV. Flat-plate cone substitutes for cone, single layer inner magnetism type self-magnetism shielding magnetic circuit is adopted to thin the speaker, super large caliber speech coil supports plate-cone to obtain best uniform force vibration,'point 'drive changes to' surface' drive, which eliminates division distortion and front cell effect, obtains more level frequency response curve than ordinary cone speaker. The invention is superior in low frequencylarge dynamic state, large power and low cost; unique self-magnetic shielding effect and self-radiation effect is difficult to accomplish for ordinary cone speaker and structure, which is even betterthan plate speaker home and abroad.

Description

Technical field [0001] The invention relates to a loudspeaker, in particular to a strip-shaped flat-panel loudspeaker driven by a large dynamic uniform force. The present invention is especially suitable for large-screen liquid crystal, plasma flat-panel TV, various types of rear-projection TVs, and sound playback occasions that require thin shape, small space volume, high power, low frequency and high dynamics. technical background [0002] Large-screen LCD and plasma flat-panel TVs develop rapidly due to their high-definition, high-contrast, high-brightness colors, ultra-thin, and fashionable shapes, but their important audio links seem relatively backward. Due to the ultra-thin appearance structure of the flat-panel TV, a matching ultra-thin flat-panel speaker with good sound quality and appearance must be required, especially the birth of a strip-shaped flat-panel speaker and its sound box. Only flat-panel speakers can greatly reduce the thickness of speakers and their ...

AI Technical Summary

Problems solved by technology

This kind of flat-panel speaker box can be several centimeters thick, and can be painted on the flat-panel vibrating basin, so it is called an "art speaker". ; Secondly, the power is small

But the problem with this method is that: the small-diameter voice coil can be regarded as a "point" drive approximately, and the vibration basin of the flat panel speaker needs a synchronous "surface" drive; the distortion caused by the point drive can be tolerated for the cone speaker, but for The distortion of the plate vibrating cone will be very prominent, because the vibrating amplitude of the vibrating cone near the middle voice coil is large, while the vibrating amplitude of the vibrating cone far away from the voice coil is small

Because the commonly used cone speaker is still used, and the double magnetic steel and magnetic shielding cover are used for anti-magnetic, the total thickness of the speaker is greatly increased, which further occupies the internal volume of the already thinned sound bar, resulting in low and mid-frequency frequency response. Deteriorated, the resonance parameters required for the design cannot be obtained

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