Abstract: A display apparatus includes a housing and at least one mirror. The housing can be detachably mounted on a display and includes an entrance that allows light emitted from the display to enter the interior of the housing with the housing mounted on the display and an exit that allows the light having entered the interior of the housing through the entrance to exit to the exterior of the housing. The at least one mirror reflects the light having entered the interior of the housing through the entrance to the exit.

Abstract: A negative photosensitive composition for forming a top plate portion of a hollow structure which contains an epoxy group-containing compound, a cationic polymerization initiator, a polyfunctional (meth)acrylate compound, and a photoradical polymerization initiator.

Abstract: A board-to-board electrical connector is so constructed that when connectors 2 and 3 are fitted to each other, capacitive coupling plates 24 and 34 are brought into the state in which they partly confront each other, with a space between each other, and also a coupling capacitance between the capacitive coupling plates 24 and 34 is adjusted by adjusting an area formed by partly confronting portions of the capacitive coupling plates 24 and 34 and a distance between the partly confronting portions of the capacitive coupling plates 24 and 34. With this construction, the board-to-board electrical connector having a specified band-pass characteristic is achieved.

Abstract: A contact 24 and a conductor plate 26, 27 are held in the housing 21 so that portions of the contact 24 except its end portion 24a and the plate 26, 27 can be put in a parallel relation to each other. Also, a contact 34 is held in the housing 31 so that when the connector 2 and 3 are fitted to each other, portions of the contact 34 except its end portion 34a and the plate 26, 27 can be put in a parallel relation with each other. Further, the end portions 24a and 34a are so shaped that the distance between the signal line formed by the contacts 24 and 34 and the plate 26, 27 can be kept substantially uniform. This can provide a stabilized impedance of the signal line formed by the contacts being contacted with each other.

Abstract: A board-to-board electrical connector is so constructed that when connecters 2 and 3 are fitted to each other, capacitive coupling plates 24 and 34 are brought into the state in which they partly confront each other, with spaced from each other, and also a coupling capacitance between the capacitive coupling plates 24 and 34 is adjusted by adjusting an area formed by partly confronting portions of the capacitive coupling plates 24 and 34 and a distance between the partly confronting portions of the capacitive coupling plates 24 and 34. With this construction, the board-to-board electrical connector having a specified band-pass characteristic is achieved.

Abstract: An electrical connector includes a first connector having first contacts; and a second connector having second contacts which are brought into contact with the first contacts when the second connector is fitted to the first connector, wherein an outer conductor, which is formed to nearly entirely surround all the first contacts and the second contacts when the first connector and the second connector are fitted to each other, is held in at lease either of the first connector and the second connector; and wherein one or more shielding conductors, which cooperate with the outer conductor to nearly entirely surround each of the first and second contacts and are held equal in potential to the outer conductor, when the first connector and the second connector are fitted to each other, are held in at least either of the first connector and the second connector.

Abstract: A contact 24 and a conductor plate 26, 27 are held in the housing 21 so that portions of the contact 24 except its end portion 24a and the plate 26, 27 can be put in a parallel relation to each other. Also, a contact 34 is held in the housing 31 so that when the connector 2 and 3 are fitted to each other, portions of the contact 34 except its end portion 34a and the plate 26, 27 can be put in a parallel relation with each other. Further, the end portions 24a and 34a are so shaped that the distance between the signal line formed by the contacts 24 and 34 and the plate 26, 27 can be kept substantially uniform. This can provide a stabilized impedance of the signal line formed by the contacts being contacted with each other.