KR20060132425A - Slim speakers - Google Patents

Abstract

The present invention relates to a slim loudspeaker, which effectively eliminates vibration of the front and rear panels of the enclosure caused by an increase in sound pressure inside the enclosure due to a decrease in volume due to the slimming of the speaker enclosure, thereby maximizing the bass reproduction ability and the middle of the enclosure. -It aims to improve high frequency sound emission characteristics. To this end, the present invention manufactures the enclosure front and rear plates in a convex curved shape of a relatively thin material, while improving the acoustic sound of the mid-high, and at the same time to make a strong form against mechanical acoustic vibrations of the bass and the front panel for mounting the speaker unit And at least one speaker unit capable of bass reproduction of less than 500 hertz, as many as the number of holes, and a predetermined number of supports in the enclosure near the inside of the hole in the front plate where the unit is mounted, which is almost perpendicular to the rear plate. By eliminating unnecessary vibrations in the enclosure front and rear panels that occur when bass sounds are reproduced through the unit, the speaker is excellent in the bass reproduction effect and the mid-high range sound radiation through the enclosure front and rear panels is a good slim speaker.

Description

Slim Speaker {Slimmed Loud Speaker}

  Figure 1. Illustration showing a conventional speaker system

  Figure 2. Illustration of a conventional subwoofer speaker system

  Figure 3 shows the shape of a conventional speaker made slim

  4. Figure showing a slim speaker according to the present invention

  Figure 5 shows an embodiment using a plurality of woofer speaker unit and treble speaker unit in a slim speaker according to the present invention

  Figure 6 shows the electrical connection diagram of the embodiment shown in FIG.

  7 is a diagram showing an embodiment of a slim home speaker having a sub-woofer function by applying three full-range speaker units in the slim speaker according to the present invention.

  8. A system configuration diagram of the embodiment shown in FIG.

  9. Figure showing an embodiment provided with a duct for reflecting bass of the slim speaker according to the present invention

  10. The figure shows an embodiment in which the slim speaker according to the present invention is integrated with the body of another image output device.

<Code Description of Main Parts of Drawing>

 -10,100: enclosure body

 -14,104: Speaker unit for woofer reproduction (woofer)

 -110,111,112: Full Range Speaker Unit

 -16,107: Speaker unit for treble reproduction (Tweeter)

 -15: Mid-Range Unit

 -17,122: Duct (for bass reflection)

 -11, 101: enclosure front

 12, 102: enclosure back panel

 -13, 103: enclosure side plate

 105,113

 -106: width of the enclosure front or back panel

 109, 114: Audio power amplifier

 115 (FL): 5.1-channel surround front left sound source (Front Left)

 116 (FC): 5.1-channel surround front center sound source (Front Center)

 117 (FR): 5.1-channel surround front right sound (Front Right)

 118 (SW): 5.1-channel surround sub-woofer sound (Sub-Woofer)

 119 (RL): 5.1-channel surround rear left source

 -120 (RR): 5.1ch surround rear right source

 121: virtual surround signal processor

 -1000: Video output device body

 -1001: Video output panel

The present invention relates to a loudspeaker for use in sound equipment.

In today's industrial society, the development of digital technology has led to the emergence of digital television, and unlike large volume televisions using CRTs, which have previously been used in homes and offices, they are used for PDP or LCD video. The display panel and the like can be used for slimming. In addition, DVD devices (DVD) devices have been widely used together with video devices, and home theater audio using the 5.1-channel surround sound reproduction method, which is its standard, has been widely used. However, despite the slimming of the digital image display device, the conventional audio system has been difficult to manufacture as a slim speaker system capable of bass reproduction.

Conventionally, as shown in FIG. 1, a speaker unit 14, a mid-range reproducing unit 15, and a treble tweeter 16 are mounted on the front plate 11 of the speaker enclosure 10 as shown in FIG. 1. do. These units are supplied to each unit by separating high, mid and low frequencies through a network circuit board provided in the enclosure 10. In addition, in the case of the bass reflective speaker, a predetermined number of ducts 17 are generally provided on the front plate 11 or the rear plate 12 of the enclosure 10 to further enrich the bass of the speaker. The sub-woofer speaker system dedicated to bass reproduction can be designed in various ways. However, the sub-woofer speaker system as shown in FIG. Here, the duct 17 is generally mounted on the front plate 11 of the enclosure 10, and the speaker unit 14 for reproducing the bass is mounted on the side plate 13 of the enclosure 10.

In the conventional speaker system as described above, the side plate 13 has a relatively wider width than the total size and volume of the enclosure 10, and is substantially wider than the front plate 11 or the rear plate 12. It is common to have a width of 13). Such a conventional speaker system causes inconveniences when placed in a living space where the place is not large, and even if it is mounted on a wall, it protrudes so much that there is a risk of collision and the like, and there is an inefficiency of space use with incongruity in interior aspects. .

In order to overcome this problem, as shown in FIG. 3, in the conventional speaker system, reducing the width of the side plate 13 reduces the overall volume, so that the enclosure having the same size as the volume of the existing speaker enclosure 10 ( 10) In order to secure the volume, the area of the front plate 11 and the rear plate 12 should be relatively large. In this case, since the sound pressure generated inside the enclosure 10 from the rear of the speaker unit 14 for bass reproduction is applied to the relatively wider front plate 11 and the rear panel 12, their resistance to mechanical vibration becomes weaker. There is a problem that the regeneration efficiency is very low. In this case, the relatively large area of the front plate 11 and the rear plate 12 may also lead to inadequate appearance of the speaker system. Therefore, if the area of the front plate 11 and the rear plate 12 is appropriately designed to secure only the minimum enclosure volume necessary for bass reproduction, the volume of the entire enclosure 10 is reduced and driven through an external audio power amplifier. Since the sound pressure inside the enclosure 10 is increased during the low tone reproduction of the low tone reproduction speaker unit 14, the low tone volume emitted to the external listener is reduced. To overcome this problem, a circuit such as a bass reinforcement equalizer is adopted inside the amplifier to increase the intensity of the bass electric voice signal applied to the speaker unit 14 for bass reproduction, thereby generating a sound pressure inside the enclosure 10 that is further stronger. . As a result, the front panel 11 and the rear panel 12 of the enclosure 10 receive stronger acoustic vibration energy. In order to overcome this, the thickness of the wood or plastic, which is generally used as a material, is made very thick, and also the thickened material. Due to this, the mid-high treble through the speaker enclosure 10 has the disadvantage that the acoustic radiation is worse.

Accordingly, the present invention overcomes the problems of the conventional speaker system, and invented the slim speaker including the function of the sub-woofer speaker system to be effectively used with the slim image device according to the change of the industrial society.

SUMMARY OF THE INVENTION The present invention has an object to solve the following aspects with regard to effective bass reproduction and mid-high range smooth emission in a slim enclosure, which is not overcome by conventional speaker enclosure fabrication techniques.

First, the design of the front and rear panels of the enclosure is designed to withstand the strong low-pitched vibration energy due to the increased sound pressure inside the enclosure due to the relative volume reduction due to the slimming of the enclosure.

Secondly, the front and rear panels of the enclosure are designed to withstand low-pitched vibrations and smooth the mid-high range of radiation through the enclosure. Perspective that the mid-high range sound, which is transmitted to the body and then radiated to the listener secondarily, has a proper combination, so that the reproduction of sound closer to the three-dimensional original sound can be achieved.

Third, it is possible to produce a slim speaker having high performance of bass reproduction and mid-high stereo sound reproduction effect at a minimum cost.

Fourth, from the perspective of design, it can be applied to more beautiful and sophisticated products without changing the functional performance.

In order to achieve the above object, the present invention, by making the front and back of the enclosure in the form of a convex curved surface of a relatively thin material, while improving the acoustic sound of the mid-high treble at the same time to make a strong form against the mechanical sound vibration of the bass After making at least one hole for the speaker unit and installing the speaker unit capable of playing the bass as many as the number of holes, there is a certain number of supports in the enclosure near the inside of the hole in the front plate where the unit is mounted, which is almost perpendicular to the rear plate. By eliminating unnecessary vibrations in the enclosure front and rear panels that occur when bass sounds are reproduced through the speaker unit, a slim speaker with excellent bass reproduction effect and excellent mid-to-high range sound emission through the enclosure front and rear panels is designed.

In order to describe in more detail the configuration and working principle of the present invention and the embodiment, etc. will be described with reference to FIGS. 4 to 10.

To this end, FIG. 4 illustrates a slim speaker having a form in which one speaker unit 104 for bass reproduction is mounted as the most basic embodiment of the slim speaker according to the present invention. Here, FIG. 4A is a front view (B) is a right side view and (C) is a plan view. As shown in FIG. 4, in the slim speaker according to the present invention, the front plate 101 having the convex curved structure as a constituent element of the enclosure 100 and the structure similar to the front plate 101 are also convex in the rearward outward direction. There is a back plate 102 having a combination of these through the side plate 103 of a relatively narrow width. Here, the width of the side plate 103 has a value of 50 percent or less of the width 106 of the front plate 101 or the back plate 102 is preferable as a slim speaker, the front plate 101 and the back plate 102 When the curved depth is sufficient, the front plate 101 and the back plate 102 may be directly coupled to each other in a form in which the side plate 103 is omitted. The front plate 101 of the enclosure 100 is equipped with one speaker unit 104 for reproducing low-frequency reproduction having one speaker unit mounting hole and capable of playing low frequencies of 500 hertz or less. In addition, the support base 105 exists near the inside of the mounting hole of the speaker unit 104 for reproducing the bass 101 of the enclosure 100 so that it is almost perpendicular (or perpendicular) to the front plate 101 and the rear plate 102. You can see it doing. At least one support 105 is required here, and the number of devices may be increased at regular intervals as needed to improve performance. However, the most basic point of installing the support 105 should start near the inside of the mounting hole of the speaker unit 104 for bass reproduction. Because the influence on the vibration of the front plate 101 due to the weight of the speaker unit 104 for the bass reproduction is great, the support 105 is a speaker unit 104 for the bass reproduction of the front panel 101 in order to effectively prevent this. At least one inside the mounting hole must be installed. In addition, even if the support 105 is installed more than a certain number, if the shape of the front plate 101 or the back plate 102 has a flat form, since the acoustic vibrations between each support 105 is severely generated Not only will the tone of the speaker become poor. The resistance to mechanical vibration of the front plate 101 and the back plate 102 at the bass portion is also significantly reduced. Therefore, it is essential that the front plate 101 and the back plate 102 have a curved shape. If either of the front plate 101 or the back plate 102 has a curved surface of concave shape inwardly, a similar effect can be obtained with respect to the vibration suppression force, but it is not practical because the total volume of the enclosure 100 is reduced. In addition, when the support 105 is mounted in a form that strongly pushes the front plate 101 and the rear plate 102 outward in the enclosure 100, the slim speaker according to the present invention can exhibit a greater effect.

5 shows a slim speaker in which four speaker units 104 and one tweeter 107 for reproducing are mounted according to another embodiment of the present invention. Here, a state in which all four support bases 105 are positioned between each speaker unit 104 for bass reproduction is shown. 6 illustrates an electrical connection diagram of the slim speaker shown in FIG. 5. Here, as an example of a plurality of speaker unit wiring schemes, two speaker units for low sound reproduction 104 are connected in parallel, and then they are connected in series to each other and connected to the network circuit board 108. In general, when the impedance of each speaker unit 104 for bass reproduction is 8 ohms, the equivalent composite impedance of the bass speaker 104 seen at the bass output of the network circuit board 108 is also 8 ohms. In addition to these equivalent synthetic impedance wiring methods, their connection can be all series (synthetic impedance 32 ohm), all parallel (synthetic impedance 2 ohm), or any other series-parallel mixed connection. In addition, the electric voice signal introduced from the speaker output terminal of the external audio power amplifier 109 is connected to the tweeter 107 for the treble through the distribution of the bass and treble through the network circuit board 108. In general, the network circuit board 108 is a high-capacity coil and condenser components connected to the printed circuit board (PCB) as a circuit, and separates the bass and mid-range and the treble of the electric voice signal and distributes them to respective speaker units According to the type of distribution, two types of high and low parts are divided into two-way, treble, mid and low parts. Here, the wiring of the network circuit board 108 inside the speaker enclosure 100 from the speaker output terminal of the external audio power amplifier 109 is drawn from the outside through a pair of terminals mounted in the enclosure 100 body or in another way. It may be directly connected to the network circuit board 108 by soldering and the like after being directly introduced into the enclosure 100 in the form of a two-strand wire without using.

Note that in the configuration of the speaker unit 104 for bass reproduction shown in Fig. 6, a product of the same model is preferable for each of the four bass speaker units. In other words, they may exhibit ideal performance in terms of acoustic frequency characteristics, particularly when they have the same phase characteristics with each other in the bass portion below 500 hertz. The phase characteristics of each of the speaker units 104 for bass reproduction are closely related to the bass resonance frequencies. That is because the speaker unit has a characteristic in which the phase characteristic changes rapidly at the bass resonance frequency. Therefore, it is ideal that each speaker unit 104 for bass reproduction has the same bass resonance frequency value. In addition to such phase characteristics and low resonant frequency characteristics, it is desirable to have uniformity between the sound frequencies of the corresponding units in sound pressure. However, even in the case of the speaker unit 104 of the same model produced by the speaker unit manufacturer, such bass resonance frequency and phase characteristics have a certain level of error. In order to ensure the performance, the relative error range of each of the bass resonant speaker units 104 with respect to phase and sound pressure characteristics and bass resonance frequency values at a frequency lower than 500 Hz is limited to 25 percent. Particular attention should be paid to the wiring shown in FIG. 6 so that the polarities of the respective speaker units 104 for bass reproduction are not changed. This is because even if each unit has similar characteristics, if the polarity of any one or more units is changed in the wiring, due to this, the sound canceling phenomenon occurs between the speaker units 104 for each bass reproduction in the bass reproduction, and thus the performance cannot be exhibited sufficiently. to be.

7 is a front view (a) and a plan view (b) of an embodiment of a home theater slim speaker having a sub-woofer function using three full-range speaker units 110 to 112 in the slim speaker according to the present invention. It is shown through and the system configuration for this is shown in FIG. Since this embodiment is intended to be used with a wall-mounted video device for a home theater, it is considered that current wall-mounted PDP or LCD TVs have a 16: 9 aspect ratio. The embodiment in which the slim speaker according to the present invention is applied in the horizontal direction is shown. Here, the center of the front panel 101 of the enclosure 100 is equipped with a full-range speaker unit 111 for reproducing the surround front center sound source (FC, 116) channel of the home theater 5.1 channel. (101) A full-range speaker unit 110 for reproduction of a 5.1-channel surround front left sound source (FL, 115) channel on the left side, and a 5.1-channel surround front right sound source on the right side of the front panel 101. It can be seen that the full-range speaker unit 112 for reproduction of the (FR, 117) channel is mounted, respectively. In addition, each of the supports 105 and 113 is located near the inside of the unit mounting hole to support the front plate 101 and the back plate 102 inside the enclosure 100 and the support positioned between the supports ( 113) They are mounted in groups by their characteristics. Each of the full-range speaker units 110 to 112 of the slim speaker system according to the present invention shown in FIG. 7 is driven through each channel of a separate multi-channel audio power amplifier 114 for surround stereophonic reproduction. . In addition, each of these three full-range speaker units 110 to 112 is jointly responsible for reproduction of the 5.1-channel surround sub-woofer sound source (SW, 118) channel together. To this end, the voice signals of the sub-woofer sound source channels SW 118 are distributed in the same phase and added to the input terminal of each channel of the audio power amplifier 114, respectively. Here, phase characteristics, bass resonance frequency characteristics, and sound pressure characteristics of the full-range speaker units 110 to 112 at a frequency lower than 500 Hz for the smooth reproduction of the sub-woofer sound source channels SW 118 are also illustrated. The same applies as mentioned in the embodiment of 5. In addition, in relation to the reproduction of the 5.1 surround back surround left sound source (RL, 119) and the right sound source (RR, 120) channel, separate rear channel power amplifiers and speakers may be installed and used, but in the system configuration of FIG. The surround signal processing unit 121 is added to the inputs of the audio power amplifier (A) (114) and the audio power amplifier (C) (114), respectively, so that a speaker and a power amplifier for a separate surround back channel are not used. You can enjoy 5.1-channel home theater sound. In addition, since the distance between the full-range speaker units 110 and 112 for the front left-right channel is relatively close, the stereoscopic effect may be slightly degraded. Implementable is easily understood by those skilled in the art.

9 illustrates an embodiment in which the duct 122 is mounted in the slim speaker according to the present invention to improve bass through reflection of bass. It is well known to those skilled in the art that the length and cross-sectional area of the passage with respect to this duct 122 can be appropriately designed in relation to the volume of the enclosure 100 and the frequency characteristics of the desired bass in the speaker system. Even in the slim speaker according to the present invention, the attachment position of the duct 122 may be mounted in any direction before and after the body of the enclosure 100, and may be functionally used. Equipped with an outlet at the bottom of the enclosure 100 back plate 102.

10 illustrates an embodiment in which the slim speaker 1002 and the image output device body 1000 are integrally provided. Here, in consideration of the fact that the body 1000 surrounding the image output panel 1001 is generally produced using plastic and injected through injection molding, the slim speaker 1002 according to the present invention is integrated with the body. In addition to the advantages that it is easier to manufacture, the cost of production can be lowered, and the effect is great in that the finished product can be delivered to the consumer and finished in one operation without being installed twice when installed in the place of use. Can be.

Therefore, the slim speaker according to the present invention has a surprisingly low bass reproduction capability in a slim enclosure by using only a certain number of inexpensive speaker units capable of relatively small-diameter bass reproduction without using a separate large-diameter sub-woofer speaker unit. At home, you can enjoy home theater surround sound, such as DVD movies, at home, and install it on a wall easily. It became. In addition, compared to the conventional high-performance sub-woofer speaker enclosure is made of mostly thick wood, the slim speaker of the present invention is made of a relatively thin plastic of about 5 mm, for example, ABS resin, etc. As it is possible, it has excellent productivity through injection molding.

Claims (7)

When the front plate is a convex curved structure and the back plate has a convex curved structure similar to the front plate, and when they are joined to each other via a side plate, the width of the side plate has a value less than 50 percent of the front plate or the back plate width, or the side plate is One or more holes for mounting a speaker unit are provided in the front panel of the slim speaker enclosure, in which the front plate and the rear plate are directly coupled to each other, and each of the holes enables low-frequency reproduction of less than 500 hertz. Or a slim speaker equipped with a full-range speaker unit, wherein at least one support is provided in the enclosure near the inner side of each unit mounting hole of the front plate or between each hole and the hole to support the front plate and the rear plate. Featuring a slim speaker. The slim speaker according to claim 1, wherein each speaker unit is electrically connected in series or in parallel or in a parallel-parallel mixed circuit with each other to provide an external electrical connection function from a single channel audio power amplifier. The slim speaker of claim 1, wherein each of the speaker units is electrically circuit-separated, each providing an electrical connection function from an external multi-channel audio power amplifier. The slim speaker according to claim 2 or 3, wherein each speaker unit has a value within a 25% relative error range in terms of phase characteristics, sound pressure characteristics, and bass resonance frequency characteristics on an acoustic frequency of 500 Hz or less. The apparatus of claim 1, wherein at least one hole for mounting a speaker unit for mid or high sound reproduction is provided on the front face of the enclosure together with each speaker unit mounting hole. A slim speaker comprising a circuit board or a condenser component and the like, together with the speaker units, to form an electrical circuit connection for 2-way or higher mid-to-high sound separation. The slim speaker according to claim 1, wherein at least one duct structure is provided at any position of the enclosure body for reflecting bass from the inside of the enclosure. The slim speaker of claim 1, wherein the enclosure body is integrated with a body of another image output device.

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