Abstract: The liquid crystal display device of the present invention includes an active matrix substrate including a first electrode, a first insulating layer, and second electrodes including a first linear electrode; a color filter substrate including a black matrix, a color filter layer, a third electrode including second linear electrodes, and a fourth electrode which is a floating electrode. The third electrode and the fourth electrode are disposed between the black matrix and the liquid crystal layer. The second linear electrodes extend in a second direction and each overlap a portion of the black matrix extending in the second direction. The fourth electrode is disposed between the second linear electrodes and overlaps the black matrix in a plan view. The control circuit switches between application of driving voltage and application of constant voltage to the third electrode.

Abstract: A modulation and demodulation method is proved for transmitting a data signal, whose data logic is expressed by an H level and an L level. The data signal is converted to a modulated signal for transmission and demodulated upon reception, with the modulated signal comprising pulse signals with duty ratios of H: L=N:1 and 1:N or H:L=1:N and N:1 (with N>1) in correspondence to the H level and the L level of the data signal.

Abstract: An upstream side motherboard 50 having an upstream side system slot 51 and upstream side daughter board mounting slots 52 to 58 and a downstream side motherboard 60 having a downstream side system slot 61 and downstream side daughter board mounting slots 62, 63 . . . are connected together by a bridging board 10. The bridging board 10 has bridge wires that electrically connect a plurality of wiring pins provided in the upstream side daughter board mounting slots and a plurality of wiring pins provided in the downstream side system slot when an upstream side connector 11 is fitted into one the upstream side daughter board mounting slots and a downstream side connector 12 is fitted into the downstream side system slot 61, and IC switches 13 and 14 that carry out connection changing on prescribed wires out of the bridge wires.

Abstract: The present invention provides an optical fiber positioning element (8) of an optical fiber converging portion (3) for converging a large number of optical fibers (5) led to a screen panel (4) for image display in an optical fiber display system. The optical fiber positioning element (8) comprises a belt-shaped body (9) and a plurality of optical fiber supports (10) provided on the upper and lower sides of the belt-shaped body (9) at a predetermined pitch in the longitudinal direction of the belt-shaped body. The optical fibers (5) are supported by engagement with a plurality of optical fiber supports (10) on the upper and lower sides of the belt-shaped body.

Abstract: An upstream side motherboard 50 having an upstream side system slot 51 and upstream side daughter board mounting slots 52 to 58 and a downstream side motherboard 60 having a downstream side system slot 61 and downstream side daughter board mounting slots 62, 63 . . . are connected together by a bridging board 10. The bridging board 10 has bridge wires that electrically connect a plurality of wiring pins provided in the upstream side daughter board mounting slots and a plurality of wiring pins provided in the downstream side system slot when an upstream side connector 11 is fitted into one the upstream side daughter board mounting slots and a downstream side connector 12 is fitted into the downstream side system slot 61, and IC switches 13 and 14 that carry out connection changing on prescribed wires out of the bridge wires.

Abstract: The motherboard MB1 of the present invention is a motherboard comprising a plurality of plug connectors 12 installed on the front face of the board 11 and a bus line for inter-connecting these plug connectors so as to allow inter-communication of daughter boards DB1-DB7 connected to the plug connectors 12. The motherboard is configured such that a termination board TB1 having a terminating resistance to decrease reflection noise of the bus line is connected to the plug connector at the last slot S8 of the bus line among the plug connectors 12, 12, . . . installed on the front face of the motherboard. Alternatively, the motherboard is configured such that the termination board is connected to the rear face of the last slot S8.

Abstract: Within a ferrule inserting hole 21 of a housing 2, a stop groove 23 is provided, while a taper portion 24 is formed as an insertion stopper. A ferrule 3 inserted and held in the housing 2 comprises a substantially cylindrical optical-fiber holding section 31, an optical-fiber crimping section 32 adapted to be crimped by means of a crimping tool for connecting electric wires or the like, and a latch 33 which expands within the stop groove 23 when positioned therein so as to prevent the ferrule 3 from dropping out. Accordingly, a crimping tool used for electric contacts in typical electric works can be used for crimping and attaching an optical fiber 4 to the ferrule 3. The ferrule 3 having the optical fiber 4 attached thereto can be firmly held by the housing 2 by simply inserting therein.