Abstract:
A method and device for connecting a flexible circuit to a printed circuit board wherein the device is integral with flexible circuit and the printed circuit board resulting in an improvement in the ease and efficiency of assembly. The printed circuit board includes a cut-out in a side edge thereof to yield an arcuate bearing rim located between a pair of opposing nocks. The printed circuit board includes a plurality of solder pads adjacent the arcuate bearing rim and the arcuate bearing rim has a predetermined length. The flexible circuit includes a pair of opposing notches located one each in a lateral edge of the flexible circuit. The flexible circuit also includes a plurality of solder pads proximate to the pair of opposing notches. The flexible circuit has a predetermined width at across the opposing notches which is substantially equal to the predetermined length of said arcuate bearing rim. The flexible circuit is caused to bow such that it can be inserted into the cut-out so that the notches interlock with the nocks with the flexible circuit engaging the bearing rim to conform to the shape of the bearing rim and automatically align the solder pads of the printed circuit board with the solder pads of the flexible circuit. The electrical and mechanical connection is completed by soldering.
Abstract:
A method of constructing a printed wiring board comprises the step of creating a printed wiring board panel (10; 82, 84) having a substrate (12) with top and bottom surfaces, having a copper film layer (14, 16) on at least one of the surfaces and having a protective foil layer over the copper film layer (14, 16). Registration holes are formed in the panel (10; 82, 84) including panel registration holes and circuit pattern registration holes with the circuit pattern registration holes being positioned adjacent a printed circuit position. The protective foil layer is removed only around the printed circuit position including the areas of the circuit pattern registration holes. Then a circuit pattern is etched in the circuit pattern position adjacent the circuit pattern registration holes. Then, the protective foil layer is removed from the circuit patterns only on the innerlayer panel so that the innerlayer panel is strengthened by the presence of a portion of the protective foil layer during processing up to the removal step prior to lamination. At an intermediate step, the circuit patterns are inspected and defective patterns are replaced by operative patterns (76) during the stacking process prior to multilayer lamination.
Abstract:
A PC board (5) for mating with a card-edge connector (25) having a selectively configured projecting tab (10) which defines a desired insertion force profile to facilitate engagement. A portion (11) of the projecting tab (10) is notched to delay the initial contact from the internal spring contacts of the mating card-edge connector (25) until a proportional amount of contacts have opened and wiped some of the PC board terminals first, and then to allow the remaining contacts to engage the notched portion. Initial insertion force is relieved in proportion to the PC board edge profile.
Abstract:
A method of constructing a printed wiring board comprises the step of creating a printed wiring board panel (10; 82, 84) having a substrate (12) with top and bottom surfaces, having a copper film layer (14, 16) on at least one of the surfaces and having a protective foil layer over the copper film layer (14, 16). Registration holes are formed in the panel (10; 82, 84) including panel registration holes and circuit pattern registration holes with the circuit pattern registration holes being positioned adjacent a printed circuit position. The protective foil layer is removed only around the printed circuit position including the areas of the circuit pattern registration holes. Then a circuit pattern is etched in the circuit pattern position adjacent the circuit pattern registration holes. Then, the protective foil layer is removed from the circuit patterns only on the innerlayer panel so that the innerlayer panel is strengthened by the presence of a portion of the protective foil layer during processing up to the removal step prior to lamination. At an intermediate step, the circuit patterns are inspected and defective patterns are replaced by operative patterns (76) during the stacking process prior to multilayer lamination.
Abstract:
Une cartouche embrochable (130) contient une mémoire amovible de type EEPROM dans laquelle sont mémorisés les paramètres correspondants à des configurations standards. La sélection, par le clavier (128) de l'unité centrale (110) de l'ensemble de contrôle, d'une configuration standard particulière, provoque le transfert des paramètres correspondants de la mémoire amovible à la mémoire vive (124) de l'unité centrale, effectuant ainsi un paramètrage automatique de l'ensemble. Les paramètres peuvent ultérieurement être modifiés dans la mémoire vive et la configuration modifiée peut être recopiée dans des emplacements vides de la mémoire amovible.
Abstract:
Bei einer Vorrichtung zur elektrisch leitenden Verbindung einer Flüssigkristallzelle mit einer Leiterplatte stehen die Flüssigkristallzelle und die Leiterplatte im wesentlichen aufeinander senkrecht und weisen zueinander passende Leiterbahnen auf, welche innerhalb eines von ihnen gebildeten Winkels durch Lot miteinander verbunden sind. In der Leiterplatte kann in einem Randbereich ein Schlitz zur Aufnahme eines Randbereichs der Flüssigkristallzelle angeordnet sein.
Abstract:
Assemblage d'au moins deux cartes de circuits imprimés connectées l'une à l'autre par une liaison à la fois mécanique et électrique comportant des agrafes chevauchant des bords adjacents des cartes. La partie centrale (12) de chaque agrafe est disposée au moins partiellement dans un logement (26, 27) formé dans les cartes (1, 2) au voisinage des bords adjacents. Les logements sont par exemple des encoches (26, 27,) allongées perpendiculairement aux bords adjacents.
Abstract:
The present disclosure provides a display module and a method for coating the same, which can prevent and/or reduce the occurrence of black seam between display modules that are arranged adjacent to each other. According to an example aspect of the present disclosure, a display module includes a printed circuit board; a plurality of luminous elements arranged at predetermined intervals on the printed circuit board; and a coating layer comprising a coating disposed between the respective luminous elements, disposed around side surfaces of the respective luminous elements positioned at an outermost, and formed to have a height that is substantially equal to a height of the side surfaces of the luminous elements, the coating being configured to block side light of the respective luminous elements.