JP2008153844A - Sound screen system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an excellent sound screen system for allowing a user to enjoy a home theater timely to a life style with no constraint on a viewing place. <P>SOLUTION: This sound screen system is formed by providing a function for connecting the upper face and bottom face of a speaker box which are necessary at right and left parts by a top plate and a bottom plate to maintain a screen, and mounting each necessary speaker to the speaker box, and mounting an amplifier to drive each speaker and a power source to operate the amplifier on the back face of the screen. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

The present invention particularly relates to a projection screen used by projecting an image with a projector.

When playing 5,1-channel multi-channel music for home theaters such as DVDs with a projection screen system, the screen is usually purchased separately and the audio equipment for music playback is purchased separately to construct the system. In some cases, special knowledge is required, and if it is placed easily, the center of the sound image and the center of the image do not match, and at the time of appreciation, unnaturalness arises from this misalignment. It is difficult to enjoy DVD software etc. Especially, this phenomenon becomes more prominent as the system becomes larger, so it is difficult for the general public to install the best system. It is not easy to enjoy the current system. If you install the system after installation of the system to an expert, there will be additional costs for the product, resulting in a high total cost. In addition, since the equipment is complicatedly connected, the movement of the equipment is not free, and there are problems in changing the room, cleaning the room, etc. As described above, there are various problems in the conventional system. There are many.

The sound screen system can be used immediately by simply connecting the power cord to the outlet by storing all the functions required for the home theater system in the system as in claims 2 to 4. Sound screen system that can be moved freely with casters.
Patent Publication 2005-176053 Patent Publication 2004-128552

In the playback of 5- and 1-channels such as DVDs and satellite broadcasts, the connection between electronic devices is very complicated and complicated, which leads to many connection errors and sometimes malfunctions. Due to the structure, it is difficult to align the center of the image playback device and the sound image, the adjustment is very troublesome, and there were not many smart systems, especially because there are many wires, cords etc. connecting the devices, cleaning around the device In many cases, the cords come off due to a hooking accident, etc., and cause abnormal operation of the system.In addition, reconnecting the removed cords to the general public is more accurate because there are many cords. Wiring is very difficult, and there are many cases that require specialists for reconstruction, so it was not easy equipment.

The present invention provides the function of maintaining the screen by connecting the top and bottom surfaces of the speaker box required on the left and right sides with a top plate and a bottom plate, and attaching the required individual speakers to the speaker box. 3. A sound screen system is formed by installing an amplifier for driving each speaker on the back of the screen and a power source for operating the amplifier, and a speaker unit for reproducing individual center signals is provided in the left and right speaker boxes as in claim 2. According to another aspect of the present invention, there is provided a sound screen system for performing center reproduction by dividing and synthesizing a center signal by an electronic circuit and reproducing the signal.

In the first and second solutions, a center speaker unit for reproducing individual center signals is provided in the left and right speaker boxes without using a center speaker for reproducing normal center signals, and the two center speakers are provided. Are connected in series inside the apparatus to reproduce the center signal. However, by connecting in series, it becomes one speaker electrically, but the electrical resistance value of the voice coil is doubled, and the sound pressure to be reproduced is half that of one, and from the left and right speaker units Since the center signal is located deep in the center of the screen and the reproduced sound is unnatural because it is smaller than the sound pressure to be reproduced, the left and right speaker units have a voice coil with half the electrical resistance and are connected in series. By using it, it becomes the same as the left and right speaker units, and it does not exist visually, but the auditory center signal is localized at the center of the screen, but if you simply install the center signal playback speaker unit in the left and right speaker boxes , Reproduced sound from individual speakers interferes and the reproduced sound becomes turbid, distorted sound, and sound image localization is very ambiguous Therefore, in order to prevent the playback sound of individual speakers from affecting each other, a partition plate is provided at the center in the horizontal direction inside the speaker box to completely shield each speaker and operate independently. Is a multi-center speaker sound screen system that can be clearly separated and reproduced with the center signal localized to the center of the screen.

As described in Solution 2 and Claim 3, the center signal is divided into two by an electronic circuit provided inside the sound screen, and the divided signals are combined into a signal in which the gains of the left and right signals are equal to the center signal. The left and right signals containing the center signal are amplified by the left and right amplifiers and played back from the left and right speakers, so that the center signal is played back in the center of the screen and can be played back by the 2-channel playback device. Center speakerless sound sound system.

As in claims 2 and 3, the same applies to subwoofer speakers. In the system up to now, the subwoofer speaker was installed at a position that was truly appropriate. Although it has been said that the installation position does not need to be strict, the devices that are currently on the market are very compact, and the speaker boxes on the front left and right and rear left and right are very small. This subwoofer method, which makes it impossible to play back and compensates for the insufficient bass with a subwoofer for convenience, is a problem, and the individual speaker boxes are too small, so not only the bass but also the mid-low Since the low frequency of the region cannot be reproduced and this insufficient mid-low range is easily reproduced from the subwoofer, the frequency related to the sound image localization from the subwoofer is reduced. There are times when the sound image localization is ambiguous, and sometimes the sound that should not be reproduced may be leaked from the subwoofer, and when you hear this sound you feel very inferior and you want to turn off the power .

Solution 3 As described above, from a signal component such as a DVD, a subwoofer is unnecessary if sufficient low-frequency sound reproduction is possible from the front left and right speaker systems. The woofer function can be satisfied by providing a small but small enough speaker system that can reproduce medium and low frequencies. Designing a speaker box that works well and providing it on the left and right sides of the screen for powerful bass reproduction. However, if the bass is easily enriched, the treble tends to become sparse. To balance the overall sound and make the system higher quality. -Since the car unit is located at the center from the outside of the left and right speaker boxes, it is easy to easily match the center of the sound image of the screen and the center of the sound image of the speaker system, and the inner half of the speaker box is as shown in FIG. It is a center speakerless, subwooferless, and sand scree system that can reduce the overall size of the system by hiding it behind the screen.

While the existing system is generally semi-fixed, the present system is a sound screen system that can be moved freely by providing a solid moving caster at the bottom of the sound screen system of claims 2 to 4.

  As described above, since the subwoofer, the center speaker, and all the wiring material cords are provided inside the sound screen system, there is no troublesome cords outside. Because it can move freely from the caster and the caster for movement, it is an excellent system that can not be considered with conventional products, there are no restrictions on viewing location, you can enjoy home theater in a timely manner in lifestyle, from the above functions, sales etc. It has high functionality as a product, such as simplification at the time of sales, and reduction of troubles caused by careless use by users after sales.

  As in claim 2, the left and right speaker boxes of FIGS. 1 and 2 with the partition plates 6 and 7 of FIG. 1 attached inside are attached to the lower part of the top plate of FIG. The speaker units 4, 5, 8, and 9 in FIG. 1 are installed to form a speaker system. The bottom plate of FIG. 1 is attached to the bottom of the left and right speaker boxes, and the amplifier and power source of FIG. Attach the casters shown in FIGS. 12 and 13 to the bottom of the bottom plate to complete the multi-center speaker and sound screen.

  As in claim 3, the left and right speaker boxes 15 and 16 in FIG. 2 are attached below the top plate in FIG. 2, and the speaker units 17 and 18 in FIG. 2 is attached to the bottom of the speaker box, the amplifier 19 and the power source of FIG. 2 are attached to the bottom plate, and the casters 21 and 22 of FIG. 2 are attached to the bottom of the bottom plate. Complete the sound screen.

  As shown in claim 4, the left and right speaker boxes 24 and 25 in FIG. 3 are attached below the top plate in FIG. 3, and the speaker units 26, 27, 28, and 29 in FIG. 3 is attached to the bottom of the speaker box, the amplifier and power source 30 are attached to the bottom of the speaker box, and the casters 32 and 33 are attached to the bottom of the bottom plate. Complete subwooferless sound screen.

  5. An electronic circuit used in the center speakerless system according to claims 3 and 4 will be described with reference to FIG. 4. The center signal input to the center input terminal of 39 in FIG. 4 is divided into two signals, input to the left and right input terminals 34 and 46 in FIG. 4 and passed through the interference prevention left and right buffer amplifiers 35 and 47 in FIG. 4, and the signals 36, 41, 43 and 48 in FIG. Each composite resistor produces a 2-channel signal in which the center signal is synthesized equally with the left and right signals, and this signal is amplified by an amplifier provided in the sound screen system and reproduced from the speakers on the left and right of the sound screen system. However, there are no amplifiers or speakers that reproduce the center signal. Played from the center of the surface.

The sound screen system, which normally maintains the screen with some frame-like instrument to maintain the screen in the vertical direction left and right, has been completed as a new functional product by expanding this frame. This function leads to various ideas and can be used in dimensions.

It is a front view of a multi-center speaker sound screen system. It is a front view of the center signal division | segmentation by an electronic circuit, a center signal left-right synthetic | combination center speakerless, and a sound screen system. 1 is a front view of a subwooferless, center speakerless, sound screen system of the present invention. FIG. It is the electronic circuit schematic of this invention.

Explanation of symbols

1-top plate, 2-left speaker box, 3-right speaker box, 4-left speaker unit, 5-right speaker unit, 6-partition plate, 7-right partition plate, 8-left center speaker unit, 9-left Center speaker unit, 10-amplifier and power supply, 11-bottom plate, 12-caster, 13-caster, 14-top plate, 15-left speaker box, 16-right speaker box, 17-left speaker unit, 18-right speaker unit , 19-amplifier and power supply, 20-bottom plate, 21-caster, 22-caster, 23-top plate, 24-left speaker box, 25-right speaker box, 26-left tweeter, 27-right tweeter, 28-right woofer 29-Left woofer, 30-Amplifier and power supply, 31-Bottom plate, 32-Caster 33-caster, 34-left input terminal, 35-left buffer amplifier, 36-left combined interference prevention resistor, 37-left preamplifier, 38-left output terminal, 39-center input terminal, 40-center buffer amplifier, 41-center Synthetic interference prevention resistor, 42-center buffer amplifier, 43-synthetic interference prevention resistor, 44-right preamplifier, 45-right output terminal, 46-right input terminal, 47-right buffer amplifier, 48-right synthetic interference prevention resistor.
48-Right output.

Claims (5)

Create a speaker box that is the same as the height of the screen, install this speaker box on the left and right outside the width of the screen, and connect this speaker box with a sufficiently strong top plate and bottom plate to form a frame that maintains the screen. The sound screen, which is integrated with the screen and the speaker system, is formed as a sound screen. The left and right speaker units, which are necessary for the function of the front side of the home theater, are attached to the speaker box to create a speaker system, and this speaker system is operated. A sound screen system characterized by the function of providing an amplifier and an electric power source for driving the amplifier on the back of the screen to maintain the screen and have a sound reproduction function. The speaker unit is attached as described in claim 1 to function as a left and right speaker system, but a center speaker unit for reproducing a center signal required for reproduction of 5, 1 channel is individually attached to the left and right speaker boxes. The center signal is played back simultaneously with the speakers, and the center signal is localized at the center of the playback screen. However, if two speaker units are operated in one speaker box, the individual playback sounds interfere and the playback sounds become very cloudy. Therefore, a multi-center speaker sound screen system that is equipped with a partition plate for preventing interference between the left and right speaker boxes, and is completely isolated inside. As in the second aspect, the center circuit is divided into two equal parts in the electric circuit provided in the frame as in the first aspect, and the divided center signal is combined equally with the left and right signals. The center speaker is synthesized by synthesizing the signal containing the signal, operating the signal with only the two-channel amplifier on the back and the left and right speaker systems, and centering the center signal from the playback sound to the center of the screen. Completely no center speakerless sound screen system.   The speaker box according to claim 3 is designed as a speaker box advantageous for low-frequency sound reproduction, and a small woofer capable of reproducing medium and low-frequency sounds and an individual tweeter are added to the speaker box, and a subwoofer as in claim 3 is not required. Center speaker, subwoofer speakerless sound screen system.   5. A sound screen system in which a caster is attached to the bottom frame of claim 1, 2, 3, 4 and is movable.

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