Abstract: There are provided a first gate electrode of a first MOS transistor formed on a semiconductor layer via a gate insulating film, a second gate electrode of a second MOS transistor formed on the semiconductor layer via the gate insulating film at a distance from the first gate electrode, first and second one conductivity type impurity introduced regions formed in the semiconductor layer on both sides of the first gate electrode to serve as source/drain of the first MOS transistor, and first and second opposite conductivity type impurity introduced regions formed in the semiconductor layer on both sides of the second gate electrode to serve as source/drain of the second MOS transistor, whereby one of the first and second opposite conductivity type impurity introduced regions is formed to contact mutually to the second one conductivity type impurity introduced region.

Abstract: In a semiconductor circuit in a display device, there are provided a first gate electrode of a first MOS transistor formed on a semiconductor layer via a gate insulating film, a second gate electrode of a second MOS transistor formed on the semiconductor layer via the gate insulating film at a distance from the first gate electrode, first and second one conductivity type impurity introduced regions formed in the semiconductor layer on both sides of the first gate electrode to serve as source/drain of the first MOS transistor, and first and second opposite conductivity type impurity introduced regions formed in the semiconductor layer on both sides of the second gate electrode to serve as source/drain of the second MOS transistor. One of the first and second opposite conductivity type impurity introduced regions is formed to contact mutually to the second one conductivity type impurity introduced region.

Abstract: When an engine test print switch specifies execution of an image forming operation test mode, a trouble state of a printer engine is detected. Based on the trouble state detection result, a driving operation of a main motor is varied, and a notice of the trouble state of the printer engine is issued, thereby easily discriminating trouble contents by using only the printer engine without any personal computer or another specific jig, etc. when the printer engine falls in a trouble state.

Abstract: When an engine test print switch specifies execution of an image forming operation test mode, a trouble state of a printer engine is detected. Based on the trouble state detection result, a driving operation of a main motor is varied, and a notice of the trouble state of the printer engine is issued, thereby easily discriminating trouble contents by using only the printer engine without any personal computer or another specific jig, etc. when the printer engine falls in a trouble state.

Abstract: There are provided a first gate electrode of a first MOS transistor formed on a semiconductor layer via a gate insulating film, a second gate electrode of a second MOS transistor formed on the semiconductor layer via the gate insulating film at a distance from the first gate electrode, first and second one conductivity type impurity introduced regions formed in the semiconductor layer on both sides of the first gate electrode to serve as source/drain of the first MOS transistor, and first and second opposite conductivity type impurity introduced regions formed in the semiconductor layer on both sides of the second gate electrode to serve as source/drain of the second MOS transistor, whereby one of the first and second opposite conductivity type impurity introduced regions is formed to contact mutually to the second one conductivity type impurity introduced region.

Abstract: A liquid crystal display apparatus has a display section formed on a first substrate. The display section including a plurality of pixels disposed in a matrix pattern, a plurality of scan lines extending in a row direction and a plurality of signal lines extending in a column direction. One pixel is connected at each cross point between the scan and signal lines and each pixel includes a semiconductor active element and a pixel electrode. A signal line driver circuit is disposed at opposite end portions in the row direction and includes semiconductor active elements for driving the scan lines. A scan line driver circuit is disposed at opposite end portions in the column direction and includes semiconductor active elements for driving the signal lines. A transparent second substrate is disposed opposing the first substrate and a liquid crystal layer is sandwiched between the first and second substrates.

Abstract: A transmitted signal is enciphered or concealed to thereby prevent interference, even when data indicative of the receiver terminal is made public because of the use of a common access channel. In the transmitter, in a random-number bit adder 6, a random-number .alpha. (digital signal) generated by a random-number generator 5 is inserted into a transmitting data signal DA generated by a transmitting data generator 1, and the resultant is outputted as a signal (DA, .alpha.). An encipherment processor 2 enciphers the signal (DA, .alpha.) and outputs it as a signal (DA, .alpha.)'. In the receiver, this signal (DA, .alpha.)' is deciphered into (DA, .alpha.), and the random-bits .varies. are removed from (DA, .alpha.) to restore the signal DA.

Abstract: A data communication system in which a data communication address for a communication terminal can arbitrarily be changed whenever the communication terminal is used. This data communication system includes a database 60 for storing a corresponding relation between an identifier 41 of a communication terminal 40 and a plurality of data communication addresses used for the communication. The database 60 stores a corresponding relation between the identifier 41 of the communication terminal and the data communication addresses during a period of use thereof in accordance with instructions from the communication terminal 40. When incoming data is received that is directed to certain data communication address, a network switching device 50 obtains an identifier corresponding to the certain data communication address and transmits the data to the communication terminal with the identifier.

Abstract: This invention appropriately regulates or controls a simultaneous communication between different communication methods. When a request of a voice communication is made with respect to a communication terminal 4 which is currently busy with a packet communication from a communication terminal 1, a voice incoming signal is generated at a voice line controller 20. Then, a communication terminal state request is output from the voice line controller 20. This is transmitted to a data base 30 through a data exchange device 21. Then, the data base 30 reads voice line memory AB, packet line memory PB and transmits the same as a communication terminal state response to the voice line controller 20 through the data exchange device 21. As a consequence, the voice line controller 20 can know the communication state of the communication terminal 4 and determines whether or not the voice communication circuit should be connected based on it.

Abstract: In a mobile communication system, a data communication fixed station 3 and a voice communication fixed station 4 control a common service area, the connection between a mobile station 5 and the data communication fixed station 3 can be quickened. The data communication fixed station 3 notifies, sequentially, the voice communication fixed station 4 of channel informations (e.g., usable channels, traffic quantity). The voice communication fixed station 4 receives the channel information via a broadcast channel for voice communication, and broadcasts the channel information to the mobile stations. When the mobile station 5 is to execute packet communication with an ISDN 1 via the data communication fixed station 3, the mobile station 5 selects an appropriate channel among the channels broadcasted thereto, and notifies the data communication fixed station 3 of the selected channel.

Abstract: The communication terminal (102) is provided with a notice unit (204) for recognizing a state of use of itself and states of use of the data terminals (103.sub.1) through (103.sub.n) and notifying a result of the recognition to the network side, whereas the network system (101) is provided with a storage unit (303) for registering a communication terminal in which the communication terminal (102) and at least one of the data terminal (103.sub.1) through (103.sub.n) became usable and deleting the registration of the communication terminal (102) or a communication terminal in which the data terminals (103.sub.1) through (103.sub.n) became unusable, in accordance with a result of the notice made by the notice unit (204), so that a receiving possible state of the communication terminal (102) is preliminarily registered on the side of the network system (101). Moreover, the receiving standby state is discriminated between a voice-only standby state and a voice and packet simultaneous standby state.

Abstract: A mobile communication fixed station 101 transmits significant data to a mobile station 103 (104) after holding the significant data for a predetermined time, and no significant data are transmitted to the mobile station during that time. When there are no significant data which are being held, the fixed station 101 transmits remaining time data indicative of the predetermined time to the mobile station, and no significant data are transmitted to the mobile station. When significant data is being held, time data indicative of the remaining time until the start of transmission of the significant data is transmitted to the mobile station in each slot from the time significant data occurs until the time the significant data is transmitted. The fixed station 103 , which has received the remaining time data stops receiving for a time interval corresponding to the remaining time.

Abstract: When data is transferred by using a plurality of time slots, the transferring period is shortened by adopting priority to assign the required number of slots. The base station BS which accepted packet P1 generates a "BUSY" signal and an echo at the final portion of the first time slot TS which begins at time t4. The base station BS, recognizing that there is a packet following the packet P1, generates a "RESERVED" signal at the final portion of the time slot TS which begins at time t5. The mobile station MS-A learns that the first time slot is assigned by recognizing the "BUSY" signal and the echo, and that the second time slot is also assigned by recognizing the "RESERVED" signal. Therefore, the first and second time slots are used successively for fast transferring.