CN103339562A - Projection display device - Google Patents
Projection display device Download PDFInfo
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- CN103339562A CN103339562A CN2011800660275A CN201180066027A CN103339562A CN 103339562 A CN103339562 A CN 103339562A CN 2011800660275 A CN2011800660275 A CN 2011800660275A CN 201180066027 A CN201180066027 A CN 201180066027A CN 103339562 A CN103339562 A CN 103339562A
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- cap assembly
- pipeline
- image display
- type image
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- 238000012886 linear function Methods 0.000 claims description 3
- 230000007423 decrease Effects 0.000 description 12
- 238000010079 rubber tapping Methods 0.000 description 7
- 238000009434 installation Methods 0.000 description 6
- 239000000463 material Substances 0.000 description 6
- 238000005187 foaming Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 230000015572 biosynthetic process Effects 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 229920002635 polyurethane Polymers 0.000 description 2
- 239000004814 polyurethane Substances 0.000 description 2
- 230000011514 reflex Effects 0.000 description 2
- 229920000459 Nitrile rubber Polymers 0.000 description 1
- 239000002390 adhesive tape Substances 0.000 description 1
- 230000000712 assembly Effects 0.000 description 1
- 238000000429 assembly Methods 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 210000005069 ears Anatomy 0.000 description 1
- 229920001971 elastomer Polymers 0.000 description 1
- 239000012467 final product Substances 0.000 description 1
- 230000005764 inhibitory process Effects 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 229920000515 polycarbonate Polymers 0.000 description 1
- 239000004417 polycarbonate Substances 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 230000005236 sound signal Effects 0.000 description 1
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Classifications
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N9/00—Details of colour television systems
- H04N9/12—Picture reproducers
- H04N9/31—Projection devices for colour picture display, e.g. using electronic spatial light modulators [ESLM]
- H04N9/3141—Constructional details thereof
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- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
- G03B21/00—Projectors or projection-type viewers; Accessories therefor
- G03B21/14—Details
- G03B21/145—Housing details, e.g. position adjustments thereof
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R1/00—Details of transducers, loudspeakers or microphones
- H04R1/20—Arrangements for obtaining desired frequency or directional characteristics
- H04R1/22—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired frequency characteristic only
- H04R1/30—Combinations of transducers with horns, e.g. with mechanical matching means, i.e. front-loaded horns
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- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Health & Medical Sciences (AREA)
- Otolaryngology (AREA)
- Acoustics & Sound (AREA)
- Multimedia (AREA)
- General Physics & Mathematics (AREA)
- Projection Apparatus (AREA)
Abstract
The present invention provides a cover member of a projection display device which can cover a connecting terminal without reducing the volume and the sound quality of a speaker sound. A projection display device (1) is provided with a main body (2), a cover member (5) and a duct (18). The main body (2) is provided with a connecting terminal (8) for connecting a cable (5) and a speaker unit (9) on the outer lateral surface (2c'). The cover member (5) is detachably provided on the outer lateral surface (2c') of the main body (2) and has a sound emitting opening (17) for emitting sound outputted from the speaker unit (9) to the outside of the cover member (5). A duct (18) is provided on the cover member (5) so as to extend from the sound emitting opening (17) to the speaker unit (9). When the cover member (5) is attached to the outer lateral surface (2c'), a gap is formed between the speaker unit (9) and the end part (20) of the duct (17) on the side of the main body (2).
Description
Technical field
The projection type image display apparatus that the present invention relates to possess splicing ear and hide the cap assembly of this splicing ear.
Background technology
Projection type image display apparatus is in order to possess for the splicing ear that connects a plurality of cables from outside input signal of video signal, voice signal.If the periphery at projection type image display apparatus draws around a plurality of cables, and expose for the splicing ear that connects this cable and projection type image display apparatus, then the outward appearance of projection type image display apparatus can become dirty and messy.Therefore, proposed to be installed on projection type image display apparatus to hide the cap assembly of cable, splicing ear.
Yet, in projection type image display apparatus, be provided with for example drive division such as cooling fan, because the vibration of drive division causes the basket of projection type image display apparatus to vibrate easily.Therefore, in the projection type image display apparatus that possesses the such accessory of above-mentioned cap assembly, thereby because causing basket and accessory collision, the vibration of basket produces bruit de froissement from accessory.Bruit de froissement becomes noise, causes the tonequality of loudspeaker sound to descend.
In addition, as if the accessory that is attached with in the speaker portion that is used for output sound, then the sound (hereinafter referred to as loudspeaker sound) from speaker portion output reflects through accessory.Thereby existence causes the accessory vibration to produce the situation of the vebrato of accessory because of the reflection of loudspeaker sound.
Particularly, be close to splicing ear near arrange in the projection type image display apparatus of speaker portion, can't only cover splicing ear with cap assembly, speaker portion is also covered by cap assembly.Therefore, loudspeaker sound is interreflection in the space that is formed between projection type image display apparatus and the cap assembly, causes bigger vebrato.Further, because loudspeaker sound is blocked by accessory, therefore also existence arrives the volume of the loudspeaker sound of looking the hearer and the problem that tonequality descends.
The several prior aries that can tackle such acoustic problem are disclosed.
In TOHKEMY 2004-297296 communique (following is patent documentation 1), the integrally formed projection type image display apparatus of basket of a kind of audio amplifier parts and projection type image display apparatus is disclosed.Owing to there is not the linking portion of audio amplifier parts and basket, thereby can prevent from colliding the bruit de froissement that produces because of basket and audio amplifier parts.
In patent documentation 1, in the disclosed projection type image display apparatus, also be provided with the audio amplifier parts at the rear portion of speaker portion.Because making the loudspeaker sound that advances to the rear of speaker portion, the audio amplifier parts can not reflex to the place ahead of speaker portion.As a result, can not be subjected to interference at the loudspeaker sound of the rear reflection of speaker portion from the loudspeaker sound that just advances to the place ahead of speaker portion of beginning, thereby improve volume and the tonequality of arrival audiovisual person's loudspeaker sound.
In addition, in the TOHKEMY 2008-5459 communique (following is patent documentation 2), a kind of projection type image display apparatus that sound-proof wall is set is disclosed between accessory and speaker portion.Because making loudspeaker sound, sound-proof wall can not arrive accessory.Therefore, loudspeaker sound does not reflect at accessory, can suppress vebrato.
In patent documentation 2, in the disclosed projection type image display apparatus, also be provided with the hole portion of reflex loudspeaker sound at the rear portion of speaker portion.Hole portion is designed to make the loudspeaker sound that reflects and the loudspeaker sound that just advances to the place ahead of speaker portion from beginning to strengthen the stack of sound wave ground.Therefore, improve volume and the tonequality of loudspeaker sound.
Yet, if with the cap assembly of disclosed structure applications in patent documentation 1, the patent documentation 2 in the above-mentioned cable of covering and splicing ear, can produce following problem.
Under the integrally formed situation of the basket of cap assembly and projection type image display apparatus, splicing ear is always hidden by cap assembly.Therefore, the user is difficult to cable is connected to splicing ear.Preferred cap assembly releasably is arranged at projection type image display apparatus with respect to basket.
The cable that is connected with splicing ear also in cap assembly by drawn around.Therefore, in cap assembly, there is not the space that sound-proof wall is set.Owing to can't between the inwall from the speaker portion to the cap assembly, sound-proof wall be set, thereby can not suppress the vebrato of cap assembly.
Further, when being covered by cap assembly in the place ahead of speaker portion, the loudspeaker sound that advances to the place ahead of speaker portion is blocked by cap assembly.Therefore, even at the rear of speaker portion audio amplifier parts, hole portion are set, the volume of the loudspeaker sound of audiovisual position, tonequality can not improve yet.
In addition, disclose a kind of projection type image display apparatus in the TOHKEMY 2009-157149 communique (following is patent documentation 3), possessed: the playback mouth, for the outside that loudspeaker sound is released to cap assembly; And pipeline, loudspeaker sound is guided to the playback mouth from speaker portion.By pipeline loudspeaker sound is released to the outside of cap assembly from the playback mouth, improves volume, the tonequality of the loudspeaker sound of audiovisual position.In addition, the reflection of the loudspeaker sound in can the generating cover parts, thus can suppress the vebrato of cap assembly.
Yet, in the patent documentation 3 in the disclosed cap assembly, pipeline and speaker portion butt.Therefore, because of the vibration of the drive division of projection type image display apparatus, cause the basket vibration of projection type image display apparatus from the sound of speaker portion, thereby may cause the collision of this basket and pipeline.As a result, produce bruit de froissement from cap assembly, the tonequality of loudspeaker sound descends.
The prior art document
Patent documentation
Patent documentation 1: TOHKEMY 2004-297296 communique
Patent documentation 2: TOHKEMY 2008-5459 communique
Patent documentation 3: TOHKEMY 2009-157149 communique
Summary of the invention
Therefore, an example of purpose of the present invention is to provide a kind of cap assembly of projection type image display apparatus, and volume, the tonequality ground that can not reduce loudspeaker sound hide splicing ear.
A kind of mode of projection type image display apparatus of the present invention comprises apparatus main body, cap assembly and pipeline.Apparatus main body possesses splicing ear and speaker portion for stube cable at lateral surface.Cap assembly is set to can load and unload with respect to the lateral surface of apparatus main body, possesses the playback mouth that the sound from speaker portion output is released to the outside of cap assembly.Pipeline is arranged at cap assembly in the mode of extending to above-mentioned speaker portion from the playback mouth under the state that is installed on above-mentioned lateral surface at cap assembly.Be installed at cap assembly under the state of lateral surface, between the end of the main body side of speaker portion and pipeline, be formed with the gap.
According to the cap assembly of projection type image display apparatus of the present invention, volume, the tonequality ground that can not reduce loudspeaker sound hide splicing ear.
Description of drawings
Fig. 1 is the stereographic map when seeing cap assembly being installed and hanging fixing projection type image display apparatus of embodiments of the present invention example from the ceiling side.
Fig. 2 is the stereographic map when seeing the cap assembly shown in Fig. 1 and projection type image display apparatus from the floor side of fabrication.
Fig. 3 is the stereographic map when having unloaded cap assembly from apparatus main body.
Fig. 4 is the stereographic map when seeing the cap assembly of the first embodiment example from apparatus main body side.
Fig. 5 is the stereographic map when seeing the cap assembly of the second embodiment example from apparatus main body side.
Fig. 6 is the cut-open view when using the cap assembly that the face of the center line by pipeline cuts off the 3rd embodiment example, is the figure of the shape of expression pipe end and playback mouth.
Fig. 7 is the cut-open view when using the cap assembly that the face of the center line by pipeline cuts off the 4th embodiment example, is the figure of the shape of expression pipe end and playback mouth.
Fig. 8 is the synoptic diagram for the bearing of trend of the center line of the pipeline of the cap assembly of explanation the 5th embodiment example.
Embodiment
Below, utilize accompanying drawing to describe the embodiments of the present invention example in detail.Hang fixing projection type image display apparatus in this explanation, but the projection type image display apparatus that the present invention can be applicable to arrange by the method that hangs beyond fixing (for example, be placed on desk, the floor projection type image display apparatus).
(the first embodiment example)
Fig. 1 is the stereographic map of the projection type image display apparatus of the first embodiment example of the present invention.Projection type image display apparatus 1 is hung with accessory (not shown) to be fixed on the ceiling (not shown) in meeting room, hall etc.Fig. 1 is the figure when looking projection type image display apparatus 1 from the ceiling skew back.
As shown in Figure 1, projection type image display apparatus 1 has the roughly apparatus main body 2 of rectangular shape.The bottom surface 2a that apparatus main body 2 is configured to apparatus main body 2 towards the upper surface 2b of ceiling (not shown), apparatus main body 2 towards floor side (not shown).Also projection type image display apparatus 1 can be configured to upper surface 2b towards ceiling side, bottom surface 2a towards floor side.
Be provided with for the projection lens 3 that amplifies the projection image at the horizontal side 2c adjacent with bottom surface 2a of apparatus main body 2.In addition, be formed with for the heat in the apparatus main body 2 being discharged to outside exhausr port 4 at horizontal side 2c.The position that projection lens 3 is not set at horizontal side 2c is equipped with cap assembly 5.
Be connected with to the cable 6 of apparatus main body 2 input electric power, signal etc. at apparatus main body 2.As cable 6, enumerate feed cable 6a to apparatus main body 2 supply capabilities, to control cable 6b, the image cable 6c of input signal of video signal of the control signal of the ON/OFF of apparatus main body 2 input change device main bodys 2, various settings and the sound cable 6d of input audio signal.
Apparatus main body 2 is based on making image by the signal of video signal of image cable 6c input.Utilize projection lens 3 with this image enlarging projection to screen (not shown).
Fig. 2 is the stereographic map when seeing projection type image display apparatus 1 shown in Fig. 1 from the upper surface 2b side of apparatus main body 2.
Dispose at upper surface 2b and to be exaggerated the control lever 7 (for example, zoom lever 7a, focusing rod 7b, lens shift rod 7c etc.) that projects to the image on the screen (not shown) for adjusting.Therefore, the user does not unload projection type image display apparatus 1 and just can operate this control lever 7 from ceiling.
In addition, the part of the basket of the apparatus main body 2 of formation upper surface 2b is lampshade 8.Lampshade 8 forms with respect to apparatus main body 2 and can load and unload.After unloading lower lamp shade 8 from apparatus main body 2, reveal the lamp (not shown) as the light source of apparatus main body 2.That is, the user does not unload projection type image display apparatus 1 just from ceiling and can change lamp.
Fig. 3 is the stereographic map when having unloaded cap assembly 5 from apparatus main body 2.As shown in Figure 3, apparatus main body 2 possesses for the splicing ear 9 that cable 6 (Fig. 1) is connected to apparatus main body 2 and the speaker portion 10 of output based on the sound of making by the voice signal of sound cable 6d (Fig. 1) input.
Fig. 4 is the stereographic map when seeing the cap assembly 5 of present embodiment example from apparatus main body 2 (Fig. 3) side.
As shown in Figures 3 and 4, be provided with the jut 11 that arranges with to apparatus main body 2 outstanding modes at cap assembly 5.Jut 11 forms can insert logical screw 12.
The position corresponding with jut 11 at apparatus main body 2 is formed with the installation base 13 that embeds screw 12.The screw 12 that connects cap assembly 5 screws togather with installation base 13, and cap assembly 5 is fixed to apparatus main body 2.
The fixing means that also can utilize other fixing meanss, for example the engaging pawl that is arranged at cap assembly 5 and the connecting hole that is arranged at apparatus main body 2 is engaged is installed to apparatus main body 2 with cap assembly 5.
In the present embodiment example, be provided with guide member 14 at cap assembly 5, be provided with guiding groove 15 at apparatus main body 2.Guide member 14 and guiding groove 15 guide to preposition with cap assembly 5 with respect to apparatus main body 2.Behind guide member 14 insertion guiding grooves 15, determine cap assembly 5 with respect to the position of apparatus main body 2, and jut 11 is disposed at the position of installation base 13.
By formation cap assembly 5 like this, the state that cable 6 is connected with splicing ear 9 with cable 6 passes through to insert port 16.In addition, as shown in Figure 2, because when being connected around cable 6 and with apparatus main body 2 from the ceiling layback, cable 6, splicing ear 9 are hidden by cap assembly 5, thereby improve the outward appearance grade of projection type image display apparatus 1.
Further, be formed with the playback mouth 17 that loudspeaker sound is released to the outside of cap assembly 5 at cap assembly 5.Therefore, the voice signal by sound cable 6d (Fig. 1) input speaker portion 10 be converted into sound and from playback mouth 17 to projection type image display apparatus 1 around emit sound.
Watch the side opposite with showing out the projects images side that the hearer is positioned at projection type image display apparatus 1 of looking of projects images.Therefore preferred, at the face of being positioned at of cap assembly 5 side opposite with the face that disposes projection lens 3 (Fig. 1), namely the face of looking the residing side of hearer is formed with playback mouth 17.By forming playback mouth 17 at the face of looking the residing side of hearer, loudspeaker sound arrives easily and looks the hearer, can suppress the decline of the volume of loudspeaker sound.
In addition, cap assembly 5 possesses pipeline 18, and this pipeline 18 is configured to be installed under the state of lateral surface 2c ' from playback mouth 17 to speaker portion 10 at cap assembly 5 and extends.By pipeline 18, form the path 19 of the loudspeaker sound from speaker portion 10 to playback mouth 17.Cap assembly 5 can be integrally formed with pipeline 18.
The position different with slotting port 16 that playback mouth 17 is formed at cap assembly 5.Therefore, cable 6 (Fig. 1) is not inserted logical playback mouth 17.
Be installed at cap assembly 5 under the state of apparatus main body 2, between the end (hereinafter referred to as pipe end 20) of apparatus main body 2 sides of pipeline 18 and speaker portion 10, be formed with the gap.
The size in the gap between pipe end 20 and the speaker portion 10 is, when 10 vibrations of the basket that causes apparatus main body 2 because of the vibration that is arranged at the drive division (for example cooling fan) in the apparatus main body 2, speaker portion, make speaker portion 10 not with the degree of pipe end 20 collisions.Therefore, even the basket of apparatus main body 2, speaker portion 10 vibrate, also can not produce the bruit de froissement of speaker portion 10 and pipeline 18 from cap assembly 5.As a result, can prevent the decline of the tonequality of the loudspeaker sound that caused by this bruit de froissement.
The opening surface of pipe end 20 is greater than the face (hereinafter referred to as voice output face) of the output sound of speaker portion 10.Therefore, loudspeaker sound enters in the pipeline 18 and from playback mouth 17 from pipe end 20 and emits.That is, loudspeaker sound can not enter in the space that the outside by the inboard of lateral surface 2c ', cap assembly 5 and pipeline 18 forms, and loudspeaker sound can not reflect in this space.As a result, the vibration of cap assembly 5 can be suppressed, the vebrato from cap assembly 5 can be suppressed.
Do not make cable 6 (Fig. 1) insert logical opening owing to forming at pipeline 18, thereby cable 6 is drawn out to the outside with the state that separates with pipeline 18 from inserting port 16.Therefore, can not emit the sound that is sent by speaker portion 10 from the port 16 of for example inserting except playback mouth 17, the hearer is looked in the easier arrival of loudspeaker sound.
The aperture area of the open area ratio pipe end 20 of playback mouth 17 is big.In addition, the area of the opening surface that intersects vertically with direct of travel loudspeaker sound path 19 (hereinafter referred to as the pipeline tapping face) of loudspeaker sound is along with becoming big from pipe end 20 gradually towards playback mouth 17.Therefore, can improve the propagation efficiency of the sound of advancing in pipeline 18, the hearer is looked in the easier arrival of loudspeaker sound.
Below, utilize embodiment to further describe the present embodiment example, but the present invention is not limited thereto.To using identical symbol to describe with the identical part shown in the above-mentioned embodiment in the following explanation.
The opening shape that makes pipe end 20 is that internal diameter is the round-shaped of 4.9cm, and the internal diameter that is shaped as of playback mouth 17 is the round-shaped of 5.8cm.Use resin material (polycarbonate), so that the area of pipeline tapping face is along with the mode that is the increase of linear function ground from pipe end 20 towards playback mouth 17 forms pipeline 18.Be the shape that linear function ground increases by the area that becomes the pipeline tapping face, can form pipeline 18 with comparalive ease.
In addition, making the length of direct of travel of the loudspeaker sound of pipeline 18 is 9cm, and making cap assembly 5 be installed on gap under the state of projection type image display apparatus 1, between speaker portion 10 and the pipe end 20 is 2mm.Between the end (hereinafter referred to as cover end 21) of apparatus main body 2 sides of cap assembly 5 and apparatus main body 2, form the gap of 3mm.
By between cover end 21 and apparatus main body 2, the gap being set, can prevent from producing bruit de froissement because of the vibration of apparatus main body 2.Jut 11 and installation base 13 butts, but firmly fix by screw 12, thereby can not produce the bruit de froissement of installation base 13 and jut 11.
(the second embodiment example)
Next, utilize Fig. 5 that the cap assembly 5 of the second embodiment example of the present invention is described.Fig. 5 is the stereographic map when seeing the cap assembly 5 of the second embodiment example from apparatus main body 2 sides.
The cap assembly 5 of present embodiment example is compared the structure difference of pipe end 20 with the cap assembly 5 (Fig. 4) of the first embodiment example.Particularly, as shown in Figure 5, pipe end 20 be formed with flange 22 full week, be provided with elastomeric element 23 in apparatus main body 2 sides of flange 22.
The size (hereinafter referred to as thickness) of the elastomeric element 23 on the direct of travel of loudspeaker sound is bigger than the gap of pipe end 20 and speaker portion 10 (Fig. 3).Therefore, when cap assembly 5 was installed on apparatus main body 2, elastomeric element 23 was compressed between pipe end 20 and apparatus main body 2.
By the gap between elastomeric element 23 fill conduit ends 20 and the apparatus main body 2, thereby loudspeaker sound can not exposed from this gap.Therefore, the volume of the sound of emitting from playback mouth 17 (Fig. 3) can not descend, and can further suppress the vebrato that causes because of the reflection of loudspeaker sound in cap assembly 5 in addition.
Further, elastomeric element 23 prevents the basket of apparatus main body 2, speaker portion 10 and collision pipeline 18.Therefore, even 10 vibrations of the basket of apparatus main body 2, speaker portion also can prevent the bruit de froissement that produces because of the collision with pipeline 18.As a result, the tonequality of loudspeaker sound can not descend.
Because the density that the effect of sound depends on material is leaked in the inhibition of elastomeric element 23, thereby the high material of preferred density.In addition, owing to suppress rigidity, the viscoelasticity that the effect of vibration transmission depends on material, thereby preferred low-repulsion excellent material.As such material, enumerate for example poriness foaming body, nitrile rubber, the vibration isolation rubber of polyurethane system.
Below, utilize embodiment to further describe the present embodiment example.The poriness foaming body of the polyurethane system of use utilizes double faced adhesive tape that elastomeric element 23 is pasted flange 22 as elastomeric element 23.The thickness that makes the poriness foaming body is 4mm, and when cap assembly 5 was installed to apparatus main body 2, the poriness foaming body was compressed to 2mm.
This kind is installed to apparatus main body 2 with cap assembly 5, drives projection type image display apparatus 1 and during from speaker portion 10 output sounds, further suppressed the decline of the volume of loudspeaker sound.In addition, further suppressed the decline of the tonequality of the loudspeaker sound that the caused bruit de froissement of vibration because of the caused vebrato of the reflection of loudspeaker sound in cap assembly 5, apparatus main body 2 causes.
(the 3rd embodiment example)
Next, utilize Fig. 6 that the cap assembly 5 of the 3rd embodiment example of the present invention is described.Fig. 6 is the cut-open view when using the cap assembly 5 that the face of the center line by pipeline 18 cuts off the 3rd embodiment example, is the figure of the shape of the opening of expression pipe end 20 and playback mouth 17.
The cap assembly 5 of present embodiment example is compared the shape difference of pipeline 18 with the cap assembly 5 (Fig. 4) of the first embodiment example.Particularly, in order further to improve the propagation efficiency of sound, so that the area of pipeline tapping face is along with the mode that is the increase of exponential function ground from pipe end 20 towards playback mouth 17 forms pipeline 18.Pipeline 18 has the structure identical with the flare of so-called trumpet type loudspeaker (spreading coefficient is 1, cutoff frequency be 27Hz).
Below, utilize embodiment to further describe the present embodiment example.
Make pipe end 20 and playback mouth 17 for round-shaped, diameter separately is that (sectional area is 18.9cm to 4.9cm
2), (sectional area is 20.6cm to 5.1cm
2).Further, so that the area of pipeline tapping face along with the mode that is exponential function ground from pipe end 20 towards playback mouth 17 and increases forms pipeline 18.
At this kind cap assembly 5 is installed to apparatus main body 2, drives projection type image display apparatus 1 and under the situation of speaker portion 10 output sounds, further suppressed the decline of the volume of loudspeaker sound.In addition, further suppressed the decline of the tonequality of the loudspeaker sound that the caused bruit de froissement of vibration because of the caused vebrato of the reflection of loudspeaker sound in cap assembly 5, apparatus main body 2 causes.Further, improved the tonequality of the loudspeaker sound of emitting from playback mouth 17.
Certainly, can similarly form flange 22 (Fig. 5) in pipe end 20 and the second embodiment example of present embodiment example, at flange 22 elastomeric element 23 (Fig. 5) is set.
(the 4th embodiment example)
Next, utilize Fig. 7 that the cap assembly 5 of the 4th embodiment example of the present invention is described.Fig. 7 is the cut-open view when using the cap assembly 5 that the face of the center line by pipeline 18 cuts off the 4th embodiment example, is the figure of the shape of expression pipe end 20 and playback mouth 17.
The difference of the cap assembly 5 (Fig. 6) of the cap assembly 5 of present embodiment example and the 3rd embodiment example is the shape of playback mouth 17 and pipeline 18.Particularly, as shown in Figure 7, playback mouth 17 has rectangular shape.Therefore, the shape of the pipeline tapping face of pipeline 18 also along with from pipe end 20 towards playback mouth 17, the area of pipeline tapping face is exponential function ground to be increased, and changes to rectangular shape gradually from round-shaped.
Further, the size of the length direction (hereinafter referred to as directions X) of the playback mouth 17 of present embodiment is bigger than the internal diameter of the playback mouth 17 of the 3rd embodiment.Therefore, the distance L between the inwall that is positioned at directions X of the pipeline 18 of present embodiment is with the rate of change bigger than the 3rd embodiment example, along with becoming big from pipe end 20 towards playback mouth 17.
Compare with the cap assembly 5 of the 3rd embodiment example from the loudspeaker sound that the playback mouth 17 of the cap assembly 5 of present embodiment example is emitted, can arrive farther scope at directions X.This has superiority when many hearers of looking exist on directions X diffusely.
In addition, the coverage area that the enlarges loudspeaker sound volume of loudspeaker sound that can cause looking hearer's locational unit area descends.For the decline of the volume that suppresses loudspeaker sound, the preferred direction that limits the coverage area that enlarges loudspeaker sound.
For example, when looking the hearer and being in the relative broad range on the floor, the direction that needs to enlarge the coverage area of loudspeaker sound is the direction parallel with the floor, and the direction that does not need to enlarge the coverage area of loudspeaker sound is the direction vertical with the floor.In such cases, can make playback mouth 17 and pipeline 18 be following shape.
That is, the size of the pipe end 20 on the size of the playback mouth 17 on the direction parallel with the floor and this direction is compared greatly, makes distance between the inwall on this direction of pipeline 18 with bigger rate of change, along with becoming big from pipe end 20 towards playback mouth 17.In addition, make the size of playback mouth 17 on the direction vertical with the floor and pipe end 20 roughly the same, the distance between the inwall on this direction of pipeline 18 is 17 big or small almost fixed from pipe end 20 to the playback mouth.
In the present embodiment example, make playback mouth 17 for rectangular shape is illustrated, but the shape, for example elliptical shape that have than length direction also can obtain same effect.
In addition, the cap assembly 5 of present embodiment example also can suppress the caused bruit de froissement of vibration of the caused vebrato of the reflection of loudspeaker sound in cap assembly 5, apparatus main body 2, can suppress the decline of the tonequality of loudspeaker sound.
Certainly, can similarly form flange 22 in pipe end 20 and the second embodiment example of present embodiment example, at flange 22 elastomeric element 23 is set.
(the 5th embodiment example)
Next, utilize Fig. 8 that the cap assembly 5 of the 5th embodiment example of the present invention is described.Fig. 8 is the figure for the bearing of trend of the center line of the pipeline 18 of the cap assembly 5 of explanation the 5th embodiment example, is along the synoptic diagram of the direction vertical with the voice output face of speaker portion 10 (Fig. 3 and Y-direction shown in Figure 4) when seeing from pipe end 20 to playback mouth 17.Among Fig. 8, solid line is represented pipe end 20, and dotted line is represented the opening of playback mouth 17.
As shown in Figure 8, the opening shape of pipe end 20 is round-shaped, playback mouth 17 be shaped as rectangular shape.Because pipeline 18 is 10 extensions from playback mouth 17 to speaker portion, thereby the center 20C of the opening of pipe end 20 is consistent with the center of speaker portion 10.The position of the center 17C of playback mouth 17 along Y-direction from playback mouth 17 to pipe end 20 when seeing, inconsistent with the position of the center 20C of the opening of pipe end 20.
Particularly, on paper, the center 17C of playback mouth 17 compares with the center 20C of the opening of pipe end 20 and is positioned at the lower-left.That is, the center line of pipeline 18 along with from pipe end 20 towards playback mouth 17 (from the inboard of paper to nearby side), extend in the mode that move the lower-left on paper.In other words, from the direction vertical with the voice output face of speaker portion 10, the center 17C of playback mouth 17 and the center of speaker portion 10 are inconsistent.
The present embodiment example has superiority when the hearer is in the position different with the front position of the voice output face of speaker portion 10 (Fig. 3) looking.
For example, be draped at projection type image display apparatus 1 (Fig. 3) and be fixed on than looking the hearer by the vertical direction upside, the voice output face of speaker portion 10 (Fig. 3) is towards with the direction of horizontal direction parallel, vertical direction upside the time, and loudspeaker sound is not more towards the situation that the direction of looking the hearer is advanced.At this moment, the center 17C of playback mouth 17 is configured to center 20C than the opening of pipe end 20 by the vertical direction downside, looks hearer's side thereby loudspeaker sound is arrived easily.
In addition, the face of the sound of output speaker portion 10 is in the horizontal direction towards when looking the different direction of hearer, the center 17C of playback mouth 17 can be configured in the horizontal direction center 20C than the opening of pipe end 20 by looking hearer's side.
That is, the looking on the straight line that the hearer forms of speaker portion 10 sides that the center 17C of playback mouth 17 is disposed at the center of the voice output face that links speaker portion 10 and is in apparatus main body 2 gets final product.When many hearers of looking is arranged, linking on the straight line that can form at the center of the voice output face of the center in the zone of the image that the speaker portion 10 side viewing apparatus main bodys 2 of apparatus main body 2 are throwed and speaker portion 10 the center 17C of configuration playback mouth 17.
The cap assembly 5 of present embodiment example also can suppress the caused bruit de froissement of vibration of the caused vebrato of the reflection of loudspeaker sound in cap assembly 5, apparatus main body 2, can suppress the decline of the tonequality of loudspeaker sound.
Certainly, also can similarly form flange 22 in pipe end 20 and the second embodiment example of present embodiment example, at flange 22 elastomeric element 23 is set.
More than, with reference to the embodiment example the present invention has been described, but the present invention is not limited to above-mentioned embodiment example.In the scope of technological thought of the present invention, those skilled in the art can carry out the various changes that can understand to form of the present invention, details.
Symbol description
1 projection type image display apparatus
2 apparatus main bodies
5 cap assemblies
6 cables
9 splicing ears
10 speaker portion
16 insert port
17 playback mouths
18 pipelines
20 pipe ends
Claims (7)
1. projection type image display apparatus wherein, comprising:
Apparatus main body, the splicing ear that possesses speaker portion and be used for stube cable at lateral surface;
Cap assembly is set to can load and unload with respect to the above-mentioned lateral surface of said apparatus main body, possesses the playback mouth that the sound from above-mentioned speaker portion output is released to the outside; And
Pipeline is disposed at above-mentioned cap assembly in the mode of extending to above-mentioned speaker portion from above-mentioned playback mouth under the state that is installed on above-mentioned lateral surface at above-mentioned cap assembly,
Be installed at above-mentioned cap assembly under the state of above-mentioned lateral surface, between the end of the aforementioned body side of above-mentioned speaker portion and above-mentioned pipeline, be formed with the gap.
2. projection type image display apparatus according to claim 1, wherein,
Above-mentioned end at above-mentioned pipeline also possesses elastomeric element, and described elastomeric element is set to and above-mentioned speaker portion butt.
3. projection type image display apparatus according to claim 1 and 2, wherein,
The aperture area of the above-mentioned end of the above-mentioned pipeline of open area ratio of above-mentioned playback mouth is big,
The aperture area of above-mentioned pipeline is along with the above-mentioned end from above-mentioned pipeline becomes big towards above-mentioned playback mouth.
4. projection type image display apparatus according to claim 3, wherein,
The aperture area of above-mentioned pipeline increases along with the above-mentioned end from above-mentioned pipeline is linear function ground towards above-mentioned playback mouth.
5. projection type image display apparatus according to claim 3, wherein,
The aperture area of above-mentioned pipeline increases along with the above-mentioned end from above-mentioned pipeline is exponential function ground towards above-mentioned playback mouth.
6. according to any described projection type image display apparatus of claim 1～5, wherein,
The opening shape of above-mentioned playback mouth is rectangle or ellipse.
7. according to any described projection type image display apparatus of claim 1～6, wherein,
From the direction vertical with the face of the output sound of above-mentioned speaker portion, the center of above-mentioned playback mouth and the center of above-mentioned speaker portion are inconsistent.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/JP2011/054302 WO2012114506A1 (en) | 2011-02-25 | 2011-02-25 | Projection display device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103339562A true CN103339562A (en) | 2013-10-02 |
| CN103339562B CN103339562B (en) | 2015-09-09 |
Family
ID=46720322
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201180066027.5A Active CN103339562B (en) | 2011-02-25 | 2011-02-25 | Projection type image display apparatus |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN103339562B (en) |
| WO (1) | WO2012114506A1 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR3110797B1 (en) * | 2020-05-25 | 2023-06-30 | Sagemcom Broadband Sas | Acoustic horn for generic loudspeaker |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH05191758A (en) * | 1992-01-13 | 1993-07-30 | Hitachi Ltd | Speaker equipment in transmission type video projection |
| JPH11225388A (en) * | 1998-02-09 | 1999-08-17 | Fujitsu Ten Ltd | Speaker |
| JP2004297296A (en) * | 2003-03-26 | 2004-10-21 | Seiko Epson Corp | Screen case for projector, cabinet for projector, audiovisual device, and projector |
| CN1825194A (en) * | 2005-02-22 | 2006-08-30 | 精工爱普生株式会社 | Projector and processing line specification method |
| JP2008005459A (en) * | 2006-05-22 | 2008-01-10 | Sharp Corp | Display device |
| JP2009157149A (en) * | 2007-12-27 | 2009-07-16 | Seiko Epson Corp | Electronic device housing cover, electronic device, and projector |
-
2011
- 2011-02-25 CN CN201180066027.5A patent/CN103339562B/en active Active
- 2011-02-25 WO PCT/JP2011/054302 patent/WO2012114506A1/en active Application Filing
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH05191758A (en) * | 1992-01-13 | 1993-07-30 | Hitachi Ltd | Speaker equipment in transmission type video projection |
| JPH11225388A (en) * | 1998-02-09 | 1999-08-17 | Fujitsu Ten Ltd | Speaker |
| JP2004297296A (en) * | 2003-03-26 | 2004-10-21 | Seiko Epson Corp | Screen case for projector, cabinet for projector, audiovisual device, and projector |
| CN1825194A (en) * | 2005-02-22 | 2006-08-30 | 精工爱普生株式会社 | Projector and processing line specification method |
| JP2008005459A (en) * | 2006-05-22 | 2008-01-10 | Sharp Corp | Display device |
| JP2009157149A (en) * | 2007-12-27 | 2009-07-16 | Seiko Epson Corp | Electronic device housing cover, electronic device, and projector |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2012114506A1 (en) | 2012-08-30 |
| CN103339562B (en) | 2015-09-09 |
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Address after: Tokyo, Japan Patentee after: Sharp NEC display solutions Co.,Ltd. Address before: Tokyo, Japan Patentee before: NEC DISPLAY SOLUTIONS, Ltd. |