Matsushita Electric Industrial Co., Ltd.

Panasonic Corporation

Tomio Shiota

Kaoru Shimizu

Naohiro Shikata

Toshiharu Hikida

Kazuhiko Kodama

Masashi Sugimoto

Hiroshi Watanabe

Minoru Kobayashi

Kazuhiko Ikeuchi

Keiji Uchida

Takashi Sabato

Hideaki Inoue

Asahiko Okada

Seiji Harada

Kiyoshi Ohhashi

A plasma display device includes a front protective cover and a back cover that form a chassis for receiving a module in which a plasma display panel is incorporated in a chassis member. The front protective cover includes a front frame having a front frame opening for exposing a front image display region of the plasma display panel, a protective plate attached to the front frame opening of the front frame, and a protective plate pressing bracket that presses the periphery of the protective plate against the edge of the front frame opening of the front frame. A reinforcing frame is disposed between the front frame and the protective plate pressing bracket.

Plasma display device

A plasma display device includes a plasma display panelthat has a front substrate including a plurality of display electrodes arranged thereon and a rear substrate having data electrodes arranged thereon to cross the display electrodes, the front substrate and the rear substrate facing each other so as to form a discharge space, and chassis memberthat holds plasma display panelon a front side and has a driving circuit block for driving plasma display panelon a rear side. Chassis memberhas base platethat is divided into a plurality of base metal plates, and, to which plasma display panelis attached, and metal platesandthat couple the plurality of base metal plates, andtogether.

Plasma display device including a chassis member having a plurality of divided base metal plates

In video equipment, a video equipment speaker device that is almost invisible from a viewer and capable of placing, toward the front of the center portion of the screen, an acoustic image from a speaker provided on at least either an upper or lower portion of a screen is provided. A speaker device includes the speaker , a sound duct positioned forward of the speaker to externally output sound, a speaker baffle provided in the vicinity of edges forming an opening of the sound duct and formed to outwardly reflect the sound, a fin provided forward of the speaker baffle , sound space formed between the speaker baffle and the fin , and slits outwardly opened from the sound space

Video equipment speaker device with acoustic lens

Speaker apparatus and television set

A casing for audiovisual equipment presents an outer appearance giving the impression of integrating a hole area formed of a plurality of sound transmitting fine holes with the casing, thereby making the hole area unnoticeable. This allows a viewer to easily concentrate on the screen by eliminating anything noticeable and distributing from the area surrounding the screen, and also gives the outside of the casing a luxurious appearance. In order to make the hole area unnoticeable, maintain good volume and quality of sound from the speaker, and arrange the diameter .o slashed.d mm of the tapered fine holes to be practically the smallest, the relationship between the diameter .o slashed.d mm and the thickness T mm of the casing must be expressed by the following formula: (1/6).times.T mm.ltoreq..o slashed.d mm.ltoreq.0.5 mm. When the fine holes are formed to be straight, the relationship between the diameter .o slashed.ds mm and the thickness T mm of the casing must be expressed by the following formula: (1/5).times.t mm .ltoreq..o slashed.ds mm.ltoreq.0.5 mm.

Audiovisual equipment and casing thereof and method of producing the same

A casing for an audiovisual equipment presents outer appearance giving the impression of integrating a hole area formed of a plurality of sound transmitting fine holes with the casing, thereby making the hole area unnoticeable. This allows a viewer to easily concentrate on the screen by eliminating anything noticeable and distracting from the area surrounding the screen, and also gives the outside of the casing a luxurious appearance. In order to make the hole area unnoticeable, maintain good volume and quality of sound from the speaker, and arrange the diameter .o slashed.d mm of the tapered fine holes to be practically the smallest, the relationship between the diameter .o slashed.d mm and the thickness T mm of the casing must be expressed by the following formula: (1/6).times.T mm.ltoreq..o slashed.d mm .apprxeq.0.5 mm. When the fine holes are formed to be straight, the relationship between the diameter .o slashed.ds mm and the thickness t mm of the casing must be expressed by the following formula: (1/5).times.t mm.ltoreq..o slashed.ds mm.ltoreq.0.5 mm.

A casing for an audiovisual equipment presents an outer appearance giving the impression of integrating a hole area formed of a plurality of sound transmitting fine holes with the casing, thereby making the hole area unnoticeable. This allows a viewer to easily concentrate on the screen by eliminating anything noticeable from the area surrounding the screen, and also gives the outside of the casing a luxurious appearance. In order to make the hole area unnoticeable, maintain good volume and quality of sound from the speaker, and arrange the diameter .phi.d mm of the tapered fine holes to be practically the smallest, the relationship between the diameter .phi.d mm and the thickness T mm of the casing must be expressed by the following formula: (1/6).times.T mm.ltoreq..phi.d mm.ltoreq.0.5 mm. When the fine holes are formed to be straight, the relationship between the diameter .phi.ds mm and the thickness tmm of the casing must be expressed by the following formula: (1/5).times.t mm.ltoreq..phi.ds mm.ltoreq.0.5 mm.

Method of producing casing for audiovisual equipment

A plurality of dummy bores with bottoms (21) are disposed in the vicinity of through holes (11) defining speaker sound emanating apertures. Each dummy bore (21) has a bottom shaped like a cone or pyramid (23) such that outer light rays (31) becoming incident through the dummy bores (21) are irregularly reflected from the bottom to emerge therefrom as decreased in intensity. With the above arrangement, the through holes (11) and dummy bores (21) may appear less differently from each other. Thus provided is a speaker grille of excellent design.

Speaker grille

A hollow structural component which includes an integral structure, partition walls intersecting each other within the integral structure, and a plurality of independent hollow portions formed as specified by the partition walls so as to be arranged within the integral structure. The integral structure is formed into one piece by one-shot molding or by one injection molding die which is caused to slide against each other between its stationary side and movable side for post-forming, whereby weight reduction of the hollow structural component, reduction in the amount of resin used, reduction in the number of parts involved, and improvement in the workability for assembling may be achieved with consequent cost reduction.

Hollow structural component

The speaker apparatus of the invention having a speaker for radiating sound waves, an acoustic pipe having a slender opening and a rectangular form, with the front opening joined to the outer wall side of a cathode-ray tube and inner wall side of a cabinet of television receiver, being disposed at the front side of the speaker, and a sound leading part composed of a hollow part surrounded between the outer wall side of the cathode-ray tube and the inner wall side of the cabinet, from the junction to the opening of the cabinet, for guiding the sound waves radiated from the acoustic pipe to the front side of the television receiver, thereby realizing acoustic reproduction of high sound quality and high sound pressure, when applied in the television receiver, in spite of small size and slim shape.

Speaker apparatus and television receiver using the same

A vibration or shock absorbing member which is composed of a material capable of effecting injection molding such as plastics, rubber, ceramics, metallic powder mixed and kneaded with a specified binder, or glass powder mixed and kneaded with a specified binder, and includes an integral structure, a plurality of protrusions formed at least on one main flat surface of the integral structure, and a plurality of independent hollow portions provided symmetrically or in an aligned state within the integral structure through intersecting partition walls. Such integral structure is molded as one unit by one-shot molding (molding at one time) or by a single molding die for expanding the range of selection for materials and spring constants so as to achieve freedom in the choice of shapes and reduction in weight.

Vibration or shock absorbing member

A speaker front sheet capable of providing a sound outlet structure well matched in finishing with a cabinet of an apparatus equipped with a speaker is disclosed, wherein a plain gauze fabric is bonded on the front surface of a perforated sheet having a porosity greater than 30% and an adhesive layer is applied to the back surface of the perforated sheet.

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Takatsuki, Japan

Tomio Shiota