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

Ultra-thin loudspeaker box for flat-panel televisions

A flat-panel TV, ultra-thin technology, applied in the direction of frequency/direction characteristic devices, etc., can solve the problems of limited amplitude of the sound cone, difficulty in improving low-frequency performance, poor applicability, etc., to achieve improved low-frequency effects, excellent low-frequency effects, and good applicability Effect

Inactive Publication Date: 2012-07-11
李世煌
View PDF4 Cites 2 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Part of the electronic components can be reduced in size relatively easily, but the sound system part is difficult to reduce, the reason is that the low-frequency performance of the speaker drops sharply when the volume is reduced
Therefore, it is very common at present that the sound system effect of flat-panel TV equipment is not good, and its low-frequency effect cannot meet the audio-visual needs at all.
[0003] To deal with this trend of small size and thin thickness, there are currently some countermeasures. One of the more common ones is to use a special racetrack-shaped cone speaker, and use the current tiled multi-coil drive cone to produce sound to improve its own low-frequency response. In this way, the design of the speaker is complicated, the cost is high, and the applicability is poor. Secondly, the effect of the low frequency is not improved obviously, because the sound waves on the front and back of the cone, especially the wavelength of the bass part, make the sound from the front and back of the cone The sound waves are basically in the same phase in terms of size, so they will cancel, which is a difficult problem for the speaker itself; other solutions use thin speakers, and the low-frequency sound waves obtained are superimposed in the same phase through labyrinths, inverted tubes, etc. to improve the sound quality. low frequency effect
This kind of thin speaker with maze, inverted tube, etc. has improved the low frequency, but it still has its insurmountable problem: the effective thickness of the speaker has been limited, the amplitude of its sound cone is therefore limited, and the overall effect is limited. The amplitude of the sound cone is limited, and it is difficult to improve the low-frequency performance

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
  • Ultra-thin loudspeaker box for flat-panel televisions
  • Ultra-thin loudspeaker box for flat-panel televisions
  • Ultra-thin loudspeaker box for flat-panel televisions

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] figure 1 It is a schematic cross-sectional view of Embodiment 1 of the present invention applied in the back shell of a flat-panel TV; figure 2 yes figure 1 The schematic diagram of the front view of the embodiment; image 3 yes figure 1 Embodiment enlarged sectional schematic diagram; In conjunction with these three figures, illustrate:

[0039] The back shell 1 is the back cover of a large-screen flat-panel TV, and the sound box body 2 is fixed on the inner wall of the back shell 1 . Inside the speaker body 2 is a resonant cavity 10 , which is a flat box whose thickness is smaller than its length and width, so its thickness direction can be properly placed in the thickness of the rear shell 1 . There is a sound cone hole 11 and a diaphragm hole 12 on the inner wall of the resonance cavity 10, the sound cone hole 11 cooperates with a loudspeaker unit 20 located in the rear loading mode inside the resonance cavity 10; the diaphragm hole 12 has a built-in passive ra...

Embodiment 2

[0042] Figure 4 It is a schematic cross-sectional view of the second embodiment of the present invention; compared with the first embodiment, the effective cone diameter of the speaker unit 20 of this embodiment is greater than the maximum thickness of the resonant cavity 10, so that the speaker unit has a larger load. At the same time, the resonant cavity 10 is no longer an independent space in the speaker body, but is formed together with the rear shell 1 through a sound box cover 3, so that the sound cone hole 11 and the diaphragm hole 12 are directly connected to the sound hole 4 on the rear shell 1. Multiplexing is realized, so that compared with Embodiment 1, the speaker unit 20 and the passive radiation unit 30 are closer to the back outer wall of the rear shell 1, a larger amplitude space of the speaker and diaphragm can be obtained, and a better low-frequency effect can be obtained. In appearance, the passive diaphragm 31 on the passive radiation unit 30 directly bec...

Embodiment 3

[0044] Such as Figure 5 , a schematic cross-sectional view of the third embodiment of the present invention; and Figure 4 Compared with the second embodiment shown, the diaphragm hole 12 of the passive radiation unit 30 is also placed directly on the back shell 1, and the resonant cavity 10 is also jointly formed by the sound box cover 3 and the back shell 1. The difference is that, The cone hole 11 is placed on the resonance cavity opposite to the cone hole 12, and the speaker unit 20 is loaded on the cone hole 11 in a front-loading manner, and its body is located outside the resonance cavity. This is a special occasion, where the entire resonant cavity is limited and cannot accommodate the thickness of the speaker unit 20, the volume of the speaker unit 20 can be avoided according to the rear of the sound box cover 3 and the positions of other devices inside the device.

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 discloses an ultra-thin loudspeaker box for flat-panel televisions, which is characterized by comprising a resonant cavity, a speaker unit and a passive radiating unit, wherein the resonant cavity is fixed on a rear shell of a flat-panel television, the thickness of the resonant cavity is less than the length and width thereof, the inner wall of the resonant cavity is provided with at least one cone hole and at least a diaphragm hole, and the diaphragm hole faces the outside of the back face of the rear shell; cones of the speaker unit are correspondingly loaded into the cone holes one by one; and the passive radiating unit is provided with passive diaphragms which are correspondingly arranged in the diaphragm holes one by one; the effective area of the passive diaphragm is not less than the effective cone area of the speaker unit; the effective diameter of the passive diaphragm is not less than the maximal thickness of the resonant cavity; and the speaker unit, the passive radiating unit and the resonant cavity are sealed. According to the scheme, air in the resonant cavity, even the passive diaphragm, becomes a relatively large load of the speaker unit, so that a good low-frequency resonance can be obtained at the passive diaphragm due to the small amplitude of the speaker unit, and finally, a significantly-improved low frequency effect is achieved.

Description

technical field [0001] The invention relates to an ultra-thin sound box used for flat panel TV equipment. Background technique [0002] As a multimedia device, flat-panel TVs or related devices have been greatly developed. While the functions are rich, the trend of flat-panelization is more obvious. The thickness of the entire device is getting smaller and smaller. In addition to the components used for display, The space occupied by other components is increasingly limited. Some electronic components can be reduced in size relatively easily, but the sound system part is difficult to reduce. The reason is that the low-frequency performance of the speaker drops sharply when the volume is reduced. Therefore, it is very common at present that the sound system effect of flat-panel TV equipment is not good, and its low-frequency effect cannot meet the audio-visual requirements at all. [0003] To deal with this trend of small size and thin thickness, there are currently some co...

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): H04R1/20
Inventor 李世煌
Owner 李世煌
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