Abstract: A liquid crystal display device according to the present invention has: a liquid crystal panel having a data line group; a data driver configured to drive the data line group of the liquid crystal panel by using a dot inversion driving method; and a power recovery circuit having an inductor. The inductor is configured to form an LC resonance circuit together with capacitance of the data line group and to collect electric power from the capacitance.

Abstract: A current source circuit includes a voltage output section which outputs a voltage signal; a current source section and a conversion section. The current source section has at least one current source block comprising a plurality of current sources, each of which outputs an output current. The conversion section is provided between the voltage output section and the current source section and outputs a reference current to the plurality of current sources of the at least one current source block based on the voltage signal such that the output current from each of the plurality of current sources is set based on the reference current.

Abstract: A display panel driving circuit includes gate lines, data lines, a first selector, a second selector, liquid crystal cells and a drive section. The gate lines extend to a first direction. The data lines extend to a second direction. The first selector selects a selection gate line from the gate lines. The second selector selects a selection data line from the data lines. The liquid crystal cells are placed in positions corresponding to crossover points between the gate lines and the data lines. The drive section outputs drive signals which drive the liquid crystal cells through the second selector based on inputted picture signals. The second selector includes main switch sections and a switch control section. The switch control section controls switching on and off of the main switch sections. Each of main switch sections includes switch elements in series. The each of main switch sections is connected with associated one of data lines at one electrode.

Abstract: A current source circuit includes a voltage output section which outputs a voltage signal; a current source section and a conversion section. The current source section has at least one current source block comprising a plurality of current sources, each of which outputs an output current. The conversion section is provided between the voltage output section and the current source section and outputs a reference current to the plurality of current sources of the at least one current source block based on the voltage signal such that the output current from each of the plurality of current sources is set based on the reference current.

Abstract: A current source circuit includes a voltage output section which outputs a voltage signal; a current source section and a conversion section. The current source section has at least one current source block comprising a plurality of current sources, each of which outputs an output current. The conversion section is provided between the voltage output section and the current source section and outputs a reference current to the plurality of current sources of the at least one current source block based on the voltage signal such that the output current from each of the plurality of current sources is set based on the reference current.

Abstract: A liquid crystal display device according to the present invention has: a liquid crystal panel having a data line group; a data driver configured to drive the data line group of the liquid crystal panel by using a dot inversion driving method; and a power recovery circuit having an inductor. The inductor is configured to form an LC resonance circuit together with capacitance of the data line group and to collect electric power from the capacitance.

Abstract: A display panel driving circuit includes gate lines, data lines, a first selector, a second selector, liquid crystal cells and a drive section. The gate lines extend to a first direction. The data lines extend to a second direction. The first selector selects a selection gate line from the gate lines. The second selector selects a selection data line from the data lines. The liquid crystal cells are placed in positions corresponding to crossover points between the gate lines and the data lines. The drive section outputs drive signals which drive the liquid crystal cells through the second selector based on inputted picture signals. The second selector includes main switch sections and a switch control section. The switch control section controls switching on and off of the main switch sections. Each of main switch sections includes switch elements in series. The each of main switch sections is connected with associated one of data lines at one electrode.

Abstract: A display device is comprised of a data line driver, a scan line driver, and a display panel. The display panel is composed of a plurality of drive legs disposed between a current output node and a first node having a fixed potential, each of the drive legs including a drive transistor having a source connected to the first node, a capacitor connected between a gate of the drive transistor and a second node having a fixed potential, a first switch connected between the current output node and a drain of the drive transistor, and a second switch connected between the gate and the drain of the drive transistor. The display panel further includes a data line, a third switch connected between the current output node and the data line, a current-driven element, a fourth switch connected between the current output node and the current-driven element.

Abstract: A current source circuit includes a voltage output section which outputs a voltage signal; a current source section and a conversion section. The current source section has at least one current source block comprising a plurality of current sources, each of which outputs an output current. The conversion section is provided between the voltage output section and the current source section and outputs a reference current to the plurality of current sources of the at least one current source block based on the voltage signal such that the output current from each of the plurality of current sources is set based on the reference current.

Abstract: A contact image sensor has a plurality of sensor elements on an insulating substrate, the sensor elements having electrodes as common electrodes and other electrodes as individual electrodes. The contact image sensor is manufactured by extending the common electrodes and the individual electrodes out of a document passage region, and forming short-circuiting patterns which electrically connect the common electrodes and the individual electrodes outside of the document passage region through pads which connect ICs for energizing the contact image sensor. After the ICs are connected to the pads, the insulating substrate is cut along the short-circuiting patterns to break the electrical connection between the common electrodes and the individual electrodes.

Abstract: A potential across an output terminal (OUT) is applied to a node N2 through a transistor (Tr66) even when a potential across a node N1 is higher than a power source voltage Vdd due to a bootstrap effect. Accordingly, the potentials between the drain and the source electrodes are not higher than the power source voltage Vdd for both a transistor (Tr62) and the transistor (Tr66). This allows circuit designing without setting the withstand voltage for the transistor over the power source voltage Vdd.

Abstract: A signal transfer circuit for dynamic action with boot strap effect is formed with an inputting transistor Tr.sub.11 and a driving transistor Tr.sub.12 for driving a load Z.sub.1. To a gate electrode of a resetting transistor Tr.sub.13, a positive voltage V.sub.1 and a negative voltage V.sub.2 are alternately applied at 50% of duty ratio in synchronism with a shift pulse by transistors Tr.sub.15 and Tr.sub.16 connected in series between the positive voltage V.sub.1 and the negative voltage V.sub.2 and pulses .PHI..sub.1R and .PHI..sub.2R which are synchronous with shift pulses .PHI..sub.1 and .PHI..sub.2. When an output Q.sub.1 is HIGH level, a transistor Tr.sub.14 becomes conductive to force a gate voltage of the transistor Tr.sub.13 to 0 to release resetting.