CN115550816A

CN115550816A - Micro-slit type digital loudspeaker for screen

Info

Publication number: CN115550816A
Application number: CN202211160427.9A
Authority: CN
Inventors: 刘长华; 金翼泽; 袁飞洋
Original assignee: Earth Mountain Suzhou Microelectronics Technology Co ltd
Current assignee: Earth Mountain Suzhou Microelectronics Technology Co ltd
Priority date: 2022-09-22
Filing date: 2022-09-22
Publication date: 2022-12-30

Abstract

The invention discloses a micro-slit type digital loudspeaker for a screen, relates to the technical field of digital loudspeakers, and aims to solve the problems that a sound field generated in the prior art is not directly opposite to a user facing the screen, and the audio-visual effect is poor. The method comprises the following steps: the loudspeaker comprises a screen, a substrate, a digital loudspeaker and a sound guide tube; the screen is connected to the opening of the shell, and a cavity is formed between the screen and the shell; the substrate is fixedly connected in the cavity; the sounding pixel unit array is fixed on the substrate, a sounding micro-slit is arranged between the screen and the frame of the shell, and the sounding micro-slit is arranged at a position corresponding to the sounding pixel unit array; the sound emitting direction is consistent with the direction of the screen; one end of the sound guide tube is fixedly connected with the screen, the other end of the sound guide tube is fixedly connected with the substrate, and the sounding pixel unit array is arranged in the area surrounded by the sound guide tube and the shell; the sound guide tube transmits sound waves outwards through the sound outlet micro-slits. The generated sound field is over against the user facing the screen, so that the audio-visual experience of the user is improved.

Description

Micro-slit type digital loudspeaker for screen

Technical Field

The invention relates to the technical field of digital speakers, in particular to a micro-slit type digital speaker for a screen.

Background

With the rapid development of large-scale integrated circuit manufacturing technology and the continuous emergence of new materials, the trend of integration and digitization of electroacoustic products is more and more obvious. The design and manufacture of loudspeakers and their drive systems, which are one of the leading devices in the electroacoustic industry, are also gradually moving towards low power consumption, low noise, miniaturization, high fidelity, and digitization. Reviewing the development history of the loudspeaker and its driving system, the future development trend is expected, which can be divided into three stages: analog speaker systems, semi-digital speaker systems, and all-digital speaker systems. The traditional analog loudspeaker system is not favored by mass consumers due to low electroacoustic conversion efficiency, high power consumption and heat generation, large noise and serious distortion; in recent years, the semi-digital speaker system generated under the drive of the digital wave adopts pulse width modulation and D-type power amplification, so that the power consumption and the heat generation are reduced, the electroacoustic conversion efficiency of the whole system is greatly improved, and the noise is reduced, thereby promoting the semi-digital speaker system to be widely applied in the fields of multimedia sound, mobile phones, MP3 players, portable computers and the like.

The sound producing element of the existing electronic product is a traditional loudspeaker which adopts the electromagnetic induction principle to play analog signals, the sound outlet is positioned on the side surface of the equipment, the generated sound field is not just opposite to a user facing a screen, and the audio-visual effect is poor.

Therefore, there is a need to provide a more reliable digital loudspeaker for a screen.

Disclosure of Invention

The invention aims to provide a micro-slit type digital loudspeaker for a screen, which is used for solving the problems that the sound field generated in the prior art is not over against a user facing the screen, and the audio-visual effect is poor.

In order to achieve the above purpose, the invention provides the following technical scheme:

the invention provides a micro-slit type digital loudspeaker for a screen, which at least comprises:

the loudspeaker comprises a screen, a substrate, a digital loudspeaker and a sound guide tube;

the screen is connected to the opening of the shell, and a cavity is formed between the screen and the shell; the substrate is fixedly connected in the cavity;

the digital loudspeaker is formed by combining sounding pixel unit arrays, the sounding pixel unit arrays are fixed on the substrate, and a sounding micro-slit is arranged between the screen and the frame of the shell; the sound emitting direction of the digital loudspeaker is consistent with the orientation of the screen; one end of the sound guide tube is fixedly connected with the screen, the other end of the sound guide tube is fixedly connected with the substrate, and the sounding pixel unit array is arranged in an area surrounded by the sound guide tube and the shell; the sound guide tube transmits sound waves emitted by the pixel unit array to the sound outlet micro-slits, and the sound waves are transmitted outwards by the sound outlet micro-slits.

Optionally, the sound emitting micro-slits are arranged on the side wall of the shell; the sound emitting micro-slits are arranged along the circumferential direction of the shell, and are arranged at positions corresponding to the sound emitting pixel unit array.

Optionally, the micro-slit digital speaker further includes: the driving module is fixed on the substrate and is in communication connection with the sounding pixel unit array; and the driving module receives a digital switching signal sent by a processor of the equipment and applies a working signal to the corresponding sounding pixel unit in the sounding pixel unit array.

Optionally, the micro-slit digital speaker further includes:

the protective cover is fixed at the sound-emitting micro-seam; the protective cover is a netted waterproof sound-transmitting grid and is used for protecting the sounding pixel unit array.

Optionally, the slit-type digital speaker is used for screens of different shapes, and the shape of the slit-type digital speaker corresponds to the screen.

Optionally, the digital speaker is arranged in at least one of four directions, namely, up, down, left and right directions of the housing frame; digital speakers in various directions play audio of different channels.

Optionally, digital speakers are arranged in any two directions of the frame; the digital loudspeakers in the two directions play different sound channels respectively, and the direction of the formed cylindrical wave is consistent with that of the screen and points to a user together.

Optionally, all the sounding pixel units in the sounding pixel unit array in the digital speaker are divided into a plurality of subgroups, and different audios are played respectively; one of the digital speakers plays a plurality of sound channels.

Optionally, the number of channels of the digital speaker is automatically allocated according to the number of audio channels to be played.

Optionally, the digital speakers are disposed in four directions of the frame, and the sound channels of the digital speakers include: a left channel, a right channel, a center channel, a low frequency channel, and a surround channel; the surround channels include: a left surround sound channel, a right surround sound channel, a left sky surround sound channel, and a right sky surround sound channel;

the surround sound channel is reflected by the wall surface and reaches the ears of a person by emitting directional sound wave radiation to the periphery.

Compared with the prior art, the invention provides the micro-slit type digital loudspeaker for the screen. At least comprises the following steps: the loudspeaker comprises a screen, a substrate, a digital loudspeaker and a sound guide tube; the screen is connected to the opening of the shell, and a cavity is formed between the screen and the shell; the substrate is fixedly connected in the cavity; the digital loudspeaker is formed by combining sounding pixel unit arrays, the sounding pixel unit arrays are fixed on the substrate, a sounding micro-slit is arranged between the screen and the frame of the shell, and the sounding micro-slit is arranged at a position corresponding to the sounding pixel unit arrays; the sound emitting direction of the digital loudspeaker is consistent with the orientation of the screen; one end of the sound guide tube is fixedly connected with the screen, the other end of the sound guide tube is fixedly connected with the substrate, and the sounding pixel unit array is arranged in the area surrounded by the sound guide tube and the shell; the sound guide tube transmits sound waves to the sound outlet micro-slits, and the sound waves are transmitted outwards through the sound outlet micro-slits. The digital sound production chip has the advantages of high-frequency sound range, good sound quality, quick response, small distortion, thin thickness and the like, the sound production direction of the micro-slit type loudspeaker is consistent with the orientation of the screen, and the audio-visual experience of a user is improved. The digital sound production chip can be directly packaged on the mainboard, and the space utilization rate and the integrity of the equipment are improved.

Drawings

The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention and not to limit the invention. In the drawings:

fig. 1 is a schematic view of the internal structure of a micro-slit digital speaker for a screen according to the present invention;

fig. 2 is a schematic cross-sectional structure diagram of a digital micro-slit speaker for a screen according to the present invention;

FIG. 3 is a schematic diagram of the positions of the digital speakers disposed on the upper and lower frames of the screen;

FIG. 4 is a schematic diagram of the positions of the digital speakers disposed on the left and right frames of the screen;

FIG. 5 is a schematic diagram of the positions of digital speakers arranged on the peripheral frame of the screen;

FIG. 6 is a schematic diagram of the sound effect of the micro-slit digital speaker for a screen according to the present invention;

fig. 7 is a schematic diagram of the arrangement of sound channels when the digital speakers are arranged on the peripheral frame of the screen.

Reference numerals: 11-sounding pixel unit, 12-driving module, 13-sounding micro-slit, 14-substrate, 15-sound guide tube, 16-screen, 17-shell and 18-protective cover.

Detailed Description

In order to facilitate clear description of technical solutions of the embodiments of the present invention, in the embodiments of the present invention, terms such as "first" and "second" are used to distinguish the same items or similar items having substantially the same functions and actions. For example, the first threshold and the second threshold are only used for distinguishing different thresholds, and the sequence order of the thresholds is not limited. Those skilled in the art will appreciate that the terms "first," "second," etc. do not denote any order or quantity, nor do the terms "first," "second," etc. denote any order or importance.

It is to be understood that the terms "exemplary" or "such as" are used herein to mean serving as an example, instance, or illustration. Any embodiment or design described herein as "exemplary" or "such as" is not necessarily to be construed as preferred or advantageous over other embodiments or designs. Rather, use of the word "exemplary" or "such as" is intended to present concepts related in a concrete fashion.

In the present invention, "at least one" means one or more, "a plurality" means two or more. "and/or" describes the association relationship of the associated object, indicating that there may be three relationships, for example, a and/or B, which may indicate: a exists alone, A and B exist simultaneously, and B exists alone, wherein A and B can be singular or plural. The character "/" generally indicates that the former and latter associated objects are in an "or" relationship. "at least one of the following" or similar expressions refer to any combination of these items, including any combination of the singular or plural items. For example, at least one (one) of a, b, or c, may represent: a, b, c, a and b combination, a and c combination, b and c combination, or a, b and c combination, wherein a, b and c can be single or multiple.

In the prior art, the sound generating element of the existing electronic product is a traditional loudspeaker which adopts the electromagnetic induction principle to play analog signals, the sound outlet is positioned on the side surface of the equipment, and the generated sound field is not over against a user facing to the screen.

In view of this, the present invention provides a micro-slit type digital speaker for a screen.

Next, a scheme provided by an embodiment of the present specification is explained with reference to the accompanying drawings:

fig. 1 is a schematic view of an internal structure of a digital micro-gap speaker for a screen according to the present invention, and fig. 2 is a schematic view of a cross-sectional structure of a digital micro-gap speaker for a screen according to the present invention. The invention relates to a micro-slit type digital loudspeaker for a screen, which is suitable for electronic products such as mobile phones, flat panels, computers and the like. As shown in fig. 1 and 2, the structure of a mobile phone is described as an example, and includes: a screen 16, a substrate 14, a digital speaker, and a sound guide tube 15; the screen 16 is connected to the opening of the shell 17, and a cavity is formed between the screen 16 and the shell 17; the substrate 14 is fixedly connected in the cavity; the digital loudspeaker is formed by combining sound production pixel units 11 in an array mode, the sound production pixel units 11 in the array mode are fixed on the substrate 14, sound production micro-gaps 13 are arranged between the screen 16 and the frame of the shell 17, and the sound production micro-gaps 13 are arranged at positions corresponding to the sound production pixel units 11 in the array mode; the sound emitting direction of the digital loudspeaker is consistent with the orientation of the screen 16; one end of the sound guide tube 15 is fixedly connected with the screen 16, the other end of the sound guide tube 15 is fixedly connected with the substrate 14, and the array of the sounding pixel units 11 is arranged in the area enclosed by the sound guide tube 15 and the shell 17; the sound guide tube 15 transmits sound waves to the sound emission micro-slits 13, and the sound waves are transmitted outwards by the sound emission micro-slits 13.

The micro-slit type digital speaker may further include: a driving module 12, wherein the driving module 12 is fixed on the substrate 14, and the driving module 12 is connected with the sounding pixel unit 11 in an array communication manner; the driving module 12 receives a digital switching signal sent by a processor of the device, and applies a working signal to the corresponding sounding pixel unit 11 in the array of the sounding pixel units 11. The micro-slit type digital speaker may further include: a shield 18, said shield 18 being fixed at said acoustic micro-slits 13; the protective cover 18 is a mesh-shaped waterproof sound-transmitting grid for protecting the array of sound-emitting pixel units 11.

The digital sound generator is used for driving the corresponding sound pixel unit 11 to vibrate based on the digital driving signal, so that direct digital sound generation is realized. The generating pixel units in the sounding pixel unit 11 array can receive the digital switching signal and then send out the pulse sound wave, and the multiple pixel units can sound at the same time to combine the required sound wave. The driving module 12 may receive a digital switching signal sent by a processor of the device, apply a working signal to the corresponding sounding pixel unit 11, and the combined sound waves are spread outward from a sounding micro-slit 13 formed by a frame of the device and a screen 16; the substrate 14 can be used for bearing and connecting the sounding pixel unit 11, the driving module 12 and other chips on the device, the sound guide tube 15 can be used as a boundary to restrain sound waves and enable the sound waves to be transmitted to the sounding micro-slits 13, and the waterproof sound-transmitting grid can protect the sounding pixel unit 11.

In practical applications, the slit-type digital speaker provided by the present embodiment can be used for screens 16 with different shapes, and the shape of the screen 16 is not limited to a rectangle, and may also include a circle, an ellipse, a prism, or other shapes. The shape of the micro-slit type digital loudspeaker corresponds to the screen, namely the shape of the micro-slit type digital loudspeaker is matched and adapted with the screen, and the shape of the micro-slit type digital loudspeaker can be set according to the shape and the size of the screen.

In the structure in fig. 1, the digital sound chip has the advantages of a high-frequency sound range, good sound quality, quick response, small distortion, thin thickness and the like, the traditional loudspeaker is replaced by the digital sound chip, a micro-gap formed by a frame of the equipment and the screen 16 produces sound outwards, the sound producing direction of the micro-gap loudspeaker is consistent with the orientation of the screen 16, and the audio-visual experience of a user is improved. The digital sound production chip can be directly packaged on the mainboard, and the space utilization rate and the integrity of the equipment are improved.

Based on the micro-slit digital speaker for a screen in fig. 1, the embodiments of the present disclosure also provide some specific details of the structure of the micro-slit digital speaker for a screen, which are described below.

Optionally, the sound emitting micro-slits 13 are arranged on the side wall of the housing 17; the sound emitting micro-slits 13 are arranged along the circumferential direction of the housing 17.

The peripheral side wall of the shell 17 is provided with a plurality of through holes for placing keys.

The digital speakers may be disposed in at least two directions of the four directions of the upper, lower, left, and right sides of the frame of the housing 17, or may be disposed around the frame of the housing 17, which will be described below:

the digital loudspeaker is arranged in at least one direction of the four directions of the upper direction, the lower direction, the left direction and the right direction of the frame of the shell 17; digital speakers in various directions play audio of different channels. Next, description will be made with reference to FIGS. 3 to 4:

FIG. 3 is a schematic diagram of the positions of the digital speakers disposed on the upper and lower frames of the screen; FIG. 4 is a schematic diagram of the positions of the digital speakers installed on the left and right frames of the screen; as shown in fig. 3, a mobile phone is taken as an example, and a micro-slit speaker is disposed on the upper and lower frames. When the mobile phone transversely plays audio, the two micro-slit type speakers respectively play left and right sound channels, and the orientation of the formed cylindrical wave is consistent with that of the screen 16 and points to a user together. Specifically, the sound production effect of the digital speaker can be described with reference to fig. 6, and when the mobile phone is placed vertically, left and right half-edge pixels of the upper and lower micro-slit speakers can respectively play left and right channel audio, so that a stereo playing effect is achieved. In addition to the arrangement of the micro-slit speakers in the upper and lower frames, other embodiments are possible, as shown in fig. 4: such as a left and right bezel arrangement.

And the digital loudspeaker is arranged in four directions of the frame in the second arrangement mode.

Fig. 5 is a schematic diagram of the arrangement positions of the digital speakers arranged on the peripheral frame of the screen. Or as shown in fig. 5, the peripheral frames are arranged, and the realized effect is similar to that of the up-and-down arrangement.

All the sounding pixel units 11 in the array of the sounding pixel units 11 in the digital loudspeaker are divided into a plurality of subgroups and play different audios respectively; one of the digital speakers plays a plurality of sound channels. And the number of the sound channels of the digital loudspeaker is automatically distributed according to the number of the audio sound channels to be played.

When the digital speakers are arranged in four directions of the frame, the description can be made with reference to fig. 7, and fig. 7 is a schematic diagram of the arrangement of the sound channels when the digital speakers are arranged in the frame around the screen. The digital loudspeaker is arranged in four directions of the frame, and the sound channel of the digital loudspeaker comprises: a left channel, a right channel, a center channel, a low frequency channel, and a surround channel; the surround channels include: a left surround sound channel, a right surround sound channel, a left sky surround sound channel, and a right sky surround sound channel; the surround sound channel is radiated by sound waves emitting directional directions to the periphery, and the sound waves are reflected by the wall surface and then reach human ears. Take the example that the loudspeakers are arranged on the four peripheral frames:

wherein L is a left vocal tract; r is a right vocal tract; c is a center channel; sub is a low frequency channel; SL is the left surround channel; SR is a right surround channel; skyL is the left sky surround sound track; skyR is the right sky surround channel. Surround the sound channel and radiate through the sound wave to directional all around transmission, reach people's ear after the wall reflection, realize the effect of encircleing in the physics. When the sound wave is difficult to reflect in the open space, the audio can be processed according to the HRTF signal processing technology, and the virtual surround effect is realized through double-channel playing. Therefore, the micro-slit type digital loudspeaker can realize the functions and effects similar to soundbar, greatly improve the audio-visual experience of users and realize three-dimensional sound production.

While the invention has been described in connection with various embodiments, other variations to the disclosed embodiments can be understood and effected by those skilled in the art in practicing the claimed invention, from a review of the drawings, the disclosure, and the appended claims. In the claims, the word "comprising" does not exclude other elements or steps, and the word "a" or "an" does not exclude a plurality. A single processor or other unit may fulfill the functions of several items recited in the claims. The mere fact that certain measures are recited in mutually different dependent claims does not indicate that a combination of these measures cannot be used to advantage.

While the invention has been described in conjunction with specific features and embodiments thereof, it will be evident that various modifications and combinations can be made thereto without departing from the spirit and scope of the invention. Accordingly, the specification and figures are merely exemplary of the invention as defined in the appended claims and are intended to cover any and all modifications, variations, combinations, or equivalents within the scope of the invention. It will be apparent to those skilled in the art that various changes and modifications may be made in the present invention without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.

Claims

1. A digital loudspeaker of the micro-slit type for a screen, characterized in that it comprises at least:

2. The digital slitted speaker for a screen of claim 1, wherein the sound emitting slits are provided on a side wall of the housing; the sound emitting micro-slits are arranged along the circumferential direction of the shell, and are arranged at positions corresponding to the sound emitting pixel unit array.

3. The micro-slit digital speaker for a screen according to claim 1, further comprising: the driving module is fixed on the substrate and is in communication connection with the sounding pixel unit array; and the driving module receives a digital switching signal sent by a processor of the equipment and applies a working signal to the corresponding sounding pixel unit in the sounding pixel unit array.

4. The micro-slit digital speaker for a screen according to claim 1, further comprising:

5. The digital micro-slit speaker for a screen according to claim 1, wherein the digital micro-slit speaker is used for screens of different shapes, and the shapes of the digital micro-slit speaker correspond to the screens.

6. The micro-slit digital speaker for a screen according to claim 1, wherein the digital speaker is arranged in at least one of four directions of up, down, left, and right of the housing rim; digital speakers in various directions play audio of different channels.

7. The micro-slit digital speaker for screens of claim 6, wherein digital speakers are arranged in any two directions of the bezel; the digital loudspeakers in the two directions play different sound channels respectively, and the direction of the formed cylindrical wave is consistent with that of the screen and points to a user together.

8. The micro-slit type digital speaker for a screen of claim 1, wherein all the sound emitting pixel units in the sound emitting pixel unit array in the digital speaker are divided into several sub-groups, respectively playing different audio frequencies; one of the digital speakers plays a plurality of sound channels.

9. The digital slitted speaker of claim 8, wherein the number of channels of the digital speaker is automatically assigned according to the number of audio channels to be played.

10. The micro-gap type digital speaker for a screen of claim 6, wherein the digital speaker is arranged in four directions of a frame, and the sound channel of the digital speaker comprises: a left channel, a right channel, a center channel, a low frequency channel, and a surround channel; the surround channels include: a left surround sound channel, a right surround sound channel, a left sky surround sound channel and a right sky surround sound channel;

the surround sound channel is radiated by sound waves emitting directional directions to the periphery, and the sound waves are reflected by the wall surface and then reach human ears.