Abstract: A light emitting device is provided including a front panel on which fluorescent elements are arranged in a matrix form and a rear panel onwhich cathodes are arranged in a corresponding relation to the fluorescent elements. The cathodes emit thermoelectrons for causing the fluorescent elements to emit light, and a square frame-like spacer is provided, one opening portionof the spacer being covered with the front panel and the other opening portion thereof covered with the rear panel. A stepped portion for fitting with the spacer is formed in a position of the rear panel to be bonded with the spacer.

Abstract: The present invention relates to light emitting devices which emit light upon impingement of thermoelectrons on a front panel having fluorescent elements and where an array of cathodes and electrodes are provided on a substrate within each light emitting device. Thus, in the present invention, first electrode leads having a coefficient of thermal expansion substantially equal to that of the substrate are inserted into and through the substrate, and second electrode leads having a coefficient of thermal expansion substantially equal to that of the rear panel are inserted into and through the rear panel, and the first and second electrode leads are connected such that the substrate is supported at a distance above the rear panel.

Abstract: A light-emitting device having front and back panels combined together through a spacer and frit glass, wherein the frit glass is prevented from flowing onto a fluorescent surface or flowing out to the outer surface side of the spacer. A joint surface of the spacer on the front panel side is provided with a slanted surface spaced more from the front panel as the outer periphery of the light-emitting device is approached. Alternatively, a gap for accommodating frit glass may be provided at an outer side portion of the joint surface. Further, the front panel and/or the back panel may be joined to the spacer by frit glass which is applied to each joint surface of the spacer by screen printing.

Abstract: The present invention relates to a light emitting device which emits light upon impingement of thermoelectrons on a front panel having fluorescent elements. In each bonding surface of a spacer which is bonded to both front and rear panels, a positional deviation or displacement of the spacer with respect to the front panel, the rear panel or a shielding electrode is prevented, whereby there is obtained a light emitting device of high accuracy free of variations in luminance, and it is made possible to reduce a dead space between adjacent light emitting devices and thereby attain a display of high resolution. In order to obtain such display, the front panel and the spacer, as well as the rear panel and the spacer, are respectively bonded through premolded frit glass.

Abstract: A display element includes a position regulating plate along the side of a condensing lens for positioning the sides of the condensing lens, a filter and an emission element in the same plane so as to prevent any deviation in the position. The display element prevents separation between a condensing lens, a filter and the front panel of an emission element even if thermal stress or other external forces are applied to the display element as well as preventing inclination of the condensing lens when the members are bonded together.

Abstract: A light source display tube arranged in matrix form in one plane as a unit element to constitute a large screen display device, where a stray path for electrons emitted from the cathode is eliminated, and concentration of the electric field of the control grid disturbing the electron flow is prevented, thereby pseudo light emission is prevented and electrical trouble is minimized in simple fashion.

Abstract: An advertizing board for use with a mobile display system is arranged in parts surrounding the display board of the system. For transport, the advertizing board is collapsible in a "nested" fashion such that a plurality of boards are arranged parallel to and adjacent each other. The top board may be simply pivoted relative to the other boards so as to fold over the top thereof.

Abstract: A display apparatus for use with a vehicle-mounted display board includes a flat plate made up of a plurality of plate pieces which surround and offset the display board during exhibition. For transport, the plate pieces are disposed around members associated with the display apparatus, to protect these members and the board from damage.

Abstract: A large sized display device including a number of heat generating display elements such as lights, etc. is provided internally with a cooling mechanism which prevents external moisture, etc. from creating problems in the internal equipment.

Abstract: A large scale display device is made up of a plurality of stackable display blocks which are assembled on location. The lowermost block is secured to a trailer having supporting outriggers.