摘要:
The shift register includes first to fourth flip-flops. A first clock signal which is in a first voltage state in a first period and in a second voltage state in second to fourth periods is input to the first flip-flop. A second clock signal which is in the first voltage state in the second period and in the second voltage state in the third period and the fourth period is input to the second flip-flop. A third clock signal which is in the second voltage state in the first, second, and fourth periods and in the first voltage state in the third period is input to the third flip-flop. A fourth clock signal which is in the second voltage state in the first and second periods and in the first voltage state in the fourth period is input to the fourth flip-flop.
摘要:
The present invention provides a semiconductor device in which a power line is not affected by noise due to a voltage drop caused by instantaneous high-current consumption in the buffer portion and that has no possibility that a logic portion malfunctions. In a case where the same potential is supplied to a logic portion and a buffer portion, by a method in which separate FPC terminals are used for the logic portion and the buffer portion, or by a method in which the FPC terminal is shared but a power line is branched for the logic portion and the buffer portion at a point close to the FPC terminal, a problem that the logic portion is affected by noise generated by a voltage drop of the power line due to instantaneous high-current consumption in the buffer portion can be prevented.
摘要:
It is an object of the present invention to prevent an insulating film from peeling in a section where the insulating film is adjacent to a sealing region. Over a first substrate 104, a pixel portion 100 provided with a light emitting element, a source driver 101, a gate driver 102, and a sealing region 103 are provided. A light emitting element is sealed between the first substrate 104 and a second substrate 110 by a sealant 108. An insulating film 107 serves as a partition wall of the light emitting element. An end portion of the insulating film 107 which is adjacent to the sealing region 103 does not overlap with a step formed by a side surface and an upper surface of a conductive film 106 which serves as a wiring.
摘要:
An object is to provide a pulse signal output circuit capable of operating stably and a shift register including the pulse signal output circuit. A pulse signal output circuit according to one embodiment of the disclosed invention includes first to tenth transistors. The ratio W/L of the channel width W to the channel length L of the first transistor and W/L of the third transistor are each larger than W/L of the sixth transistor. W/L of the fifth transistor is larger than W/L of the sixth transistor. W/L of the fifth transistor is equal to W/L of the seventh transistor. W/L of the third transistor is larger than W/L of the fourth transistor. With such a structure, a pulse signal output circuit capable of operating stably and a shift register including the pulse signal output circuit can be provided.
摘要:
A photometric device with a wide dynamic range. The photometric device includes a constant current generation circuit, a fixed clock signal generation circuit which generates a fixed clock signal having a fixed frequency, a photoelectric conversion element, a variable clock signal generation circuit, and a digital signal generation circuit. The fixed clock signal generation circuit generates a fixed clock signal that oscillates at a fixed frequency, from constant current. The variable clock signal generation circuit generates a variable clock signal that oscillates at a frequency proportional to the amount of photocurrent, from photocurrent generated in the photoelectric conversion element. The digital signal generation circuit sets a measurement period using the fixed clock signal, counts the number of pulses of the variable clock signal that oscillates for the measurement period, and outputs a digital signal including the count value as data.
摘要:
In a pulse output circuit in a shift register, a power source line which is connected to a transistor in an output portion connected to a pulse output circuit at the next stage is set to a low-potential drive voltage, and a power source line which is connected to a transistor in an output portion connected to a scan signal line is set to a variable potential drive voltage. The variable potential drive voltage is the low-potential drive voltage in a normal mode, and can be either a high-potential drive voltage or the low-potential drive voltage in a bath mode. In the batch mode, display scan signals can be output to a plurality of scan signal lines at the same timing in a batch.
摘要:
To output a digital signal corresponding to illuminance without being adversely affected by circuit delay. A photoelectric conversion device includes a photoelectric conversion element; a ramp-wave output circuit; a first comparator for comparing the ramp-wave signal and a first potential; a second comparator for comparing the ramp-wave signal and a second potential; a flip-flop circuit for generating a clock signal whose frequency is changed in accordance with the amount of photocurrent; a circuit for calculating a negative OR of the output signal of the first comparator and the output signal of the second comparator; a counter circuit for counting the pulse number of the clock signal; and a pulse output circuit for generating a period during which the pulse number is counted in the counter circuit. The pulse output circuit includes a switch for stopping the generation of the period during which the pulse number is counted.
摘要:
In a pulse output circuit in a shift register, a power source line which is connected to a transistor in an output portion connected to a pulse output circuit at the next stage is set to a low-potential drive voltage, and a power source line which is connected to a transistor in an output portion connected to a scan signal line is set to a variable potential drive voltage. The variable potential drive voltage is the low-potential drive voltage in a normal mode, and can be either a high-potential drive voltage or the low-potential drive voltage in a bath mode. In the batch mode, display scan signals can be output to a plurality of scan signal lines at the same timing in a batch.
摘要:
It is an object of the present invention to prevent an insulating film from peeling in a section where the insulating film is adjacent to a sealing region. Over a first substrate 104, a pixel portion 100 provided with a light emitting element, a source driver 101, a gate driver 102, and a sealing region 103 are provided. A light emitting element is sealed between the first substrate 104 and a second substrate 110 by a sealant 108. An insulating film 107 serves as a partition wall of the light emitting element. An end portion of the insulating film 107 which is adjacent to the sealing region 103 does not overlap with a step formed by a side surface and an upper surface of a conductive film 106 which serves as a wiring.
摘要:
It is an object of the present invention to prevent an insulating film from peeling in a section where the insulating film is adjacent to a sealing region. Over a first substrate 104, a pixel portion 100 provided with a light emitting element, a source driver 101, a gate driver 102, and a sealing region 103 are provided. A light emitting element is sealed between the first substrate 104 and a second substrate 110 by a sealant 108. An insulating film 107 serves as a partition wall of the light emitting element. An end portion of the insulating film 107 which is adjacent to the sealing region 103 does not overlap with a step formed by a side surface and an upper surface of a conductive film 106 which serves as a wiring.