摘要:
An active matrix substrate for a reflection type liquid crystal display apparatus has an image display region 10 including a plurality of pixels 1 each having a reflection electrode 4a and a switching element 2, a black display region 11 including a plurality of pixels for providing only a black display each having a reflection electrode 4b, a wiring layer 111 between the switching elements 2 and the reflection electrodes, a light shielding layer 113 between the wiring layer 111 and the layer forming the reflection electrodes, a through hole 112a between the wiring layer 111 and the light shielding layer 113 in the image display region 10 for electrically connecting the reflection electrode 4a to the switching element 2, and a through hole 112b between the wiring layer 111 and the light shielding layer 113 in the black display region 11 and electrically isolated from the switching element 2.
摘要:
A head cartridge has a print head which discharges ink, and an ink tank which contains ink which is supplied to the print head. A sensor which detects residual ink amount in the ink tank is provided in the ink tank. The print head includes a detection circuit which detects the presence of residual ink amount using the sensor, a judgment circuit which judges the presence of residual ink amount on the basis of an output from the detection circuit and outputs ink zero information when judging that there is no residual ink amount, and nonvolatile memory which stores ink zero information when the ink zero information is outputted from the judgment circuit.
摘要:
In order to provide a reflection type liquid crystal display apparatus where, even when the pixel size is small, the crosstalk between a signal line and an end of a capacitor can be decreased, thus resulting in a good output image, by forming a signal line 2 for transmitting an image signal to each pixel with a second metal layer, by placing a shield line 12 between a capacitor electrode 10 constituting a capacitor and the signal line 2 with a first metal layer, and by giving a fixed potential, shielding is provided to prevent occurrence of cross-talk. The capacitor is configured with a common electrode 11 and a capacitor electrode 10, having a diffusion layer formed on a semiconductor substrate. By placing the capacitor electrode having a diffusion layer formed on the semiconductor substrate and the common electrode having a fixed potential below the signal line, shielding is provided to prevent occurrence of cross-talk.
摘要:
In order to provide a reflection type liquid crystal display apparatus where, even when the pixel size is small, the crosstalk between a signal line and an end of a capacitor can be decreased, thus resulting in a good output image, by forming a signal line 2 for transmitting an image signal to each pixel with a second metal layer, by placing a shield line 12 between a capacitor electrode 10 constituting a capacitor and the signal line 2 with a first metal layer, and by giving a fixed potential, shielding is provided to prevent occurrence of cross-talk. The capacitor is configured with a common electrode 11 and a capacitor electrode 10, having a diffusion layer formed on a semiconductor substrate. By placing the capacitor electrode having a diffusion layer formed on the semiconductor substrate and the common electrode having a fixed potential below the signal line, shielding is provided to prevent occurrence of cross-talk.
摘要:
A liquid discharge head includes a signal processing circuit which operates with a first voltage, and generates a discharge control signal, a liquid driving circuit including an electrothermal transducer, a driving element which drives the electrothermal transducer, and a control circuit which receives the discharge control signal and outputs, to the driving element, a driving signal having a second voltage higher than the first voltage, and a monitoring circuit which monitors the first voltage and outputs a stop signal upon a drop of the first voltage. The control circuit stops driving the electrothermal transducer by the driving element in accordance with the stop signal. The monitoring circuit includes a transistor including a drain connected to power supply voltage node through a step-down circuit, a source connected to ground side, and a gate receiving the first voltage.
摘要:
In order to provide a reflection type liquid crystal display apparatus where, even when the pixel size is small, the crosstalk between a signal line and an end of a capacitor can be decreased, thus resulting in a good output image, by forming a signal line 2 for transmitting an image signal to each pixel with a second metal layer, by placing a shield line 12 between a capacitor electrode 10 constituting a capacitor and the signal line 2 with a first metal layer, and by giving a fixed potential, shielding is provided to prevent occurrence of cross-talk. The capacitor is configured with a common electrode 11 and a capacitor electrode 10, having a diffusion layer formed on a semiconductor substrate. By placing the capacitor electrode having a diffusion layer formed on the semiconductor substrate and the common electrode having a fixed potential below the signal line, shielding is provided to prevent occurrence of cross-talk.
摘要:
A light emitting element driving circuit, which can achieve accurate/high-speed operation even at low voltage supply voltage, comprises: driving current supply, connected to light emitting element in series between first and second power supplies, to supply driving current to the light emitting element according to the voltage of control terminal; current determiner to determine and output the current according to an output light amount of the light emitting element; current/voltage converter to convert the determined current into voltage and output it to the control terminal of the driving current supply if control signal is in a first state, and to electrically shield its output voltage terminal from the control terminal of the driving current supply if the control signal is in a second state; and resetter to connect the control terminal of the driving current supply to the second power supply if the control signal is in the second state.
摘要:
A driving circuit for a light-emitting element, in which it is possible to exactly control a current flown in the light-emitting element, and perform a stable operation while reducing a power-supply voltage as low as possible, is provided. The driving circuit includes a current supply circuit and a driving control circuit in which, based on a current flown from a supply transistor for supplying a current for driving the light-emitting element, and information relating to a source-drain voltage of the supply transistor, it is possible to perform control so that the current approaches a desired setting current value, and the source-drain voltage of the supply transistor has the same value when setting the voltage of the gate-terminal and when driving the light-emitting element.
摘要:
A semiconductor device constituting a liquid ejection head for ejecting a liquid such as an ink, comprising a segment having a plurality of pairs of recording element and driving element, wherein a first wiring for mutually connecting a first terminal of each driving element arranged within the same segment is formed on a first wiring layer on a semiconductor substrate, and a second terminal of the driving element and a first terminal of the recording element are connected on one for one base, and a second terminal of the recording element is connected to a power source wiring formed by the wiring layer different from the first wiring layer, and an auxiliary wiring for mutually connecting the second terminal of the recording element with the same segment is formed by the first wiring layer, thereby eliminating and suitably adjusting the irregularity of wiring resistance values within the segment.
摘要:
An image formation apparatus stably controls a drive current of a laser diode irrespective of change in density. In the apparatus, a current restriction circuit restricts a current ILD according to the output light quantity. If the current ILD increases and thus approaches to the value of a reference current IPO, the circuit outputs the current restricted to be the certain value substantially equal to the current IPO. Then, current buffers and, a current subtraction circuit, a switching circuit and a current addition circuit cooperatively supply the function current obtained from the input and output currents of the circuit to the cathode of the laser diode.