Sharp Kabushiki Kaisha Corporation

Hideki Shioe

Kazutoshi Kida

Takahiro Inoue

Takenori Maruyama

Kenshi Tada

Haruya Mori

Tetsuya Akamatsu

Masahiro Ide

Kohji Michibayashi

Yutaka Ishida

Takashi Saitoh

Kazuyoshi Maeda

Hideo Hosorogi

A touch panel-equipped display device includes at least: a display control unit to supply a scan signal and a data signal to a display control element; and a touch position detection control unit to supply a drive signal to a drive electrode, and to detect a position detection signal from a detection electrode to detect a touch position. The display control unit supplies the data signal sequentially to a plurality of display control elements connected respectively to a plurality of pixel electrodes constituting one display pixel. The touch position detection control unit starts supplying the drive signal, in a period that is within a scan write period during which the scan signal is supplied to the display control element and is other than a period during which the data signal is supplied to the display control element corresponding to a color highest in luminosity of a plurality of colors.

Touch panel-equipped display device

An LED drive circuit () for driving an LED circuit () includes: a constant current driver () including transistors (-) whose collector terminals are respectively connected with LED rows (-) connected with each other in parallel and whose emitter terminals are grounded; and an LED drive control section () for setting a voltage to be commonly applied on the LED rows (-), the setting being performed in accordance with a maximum base current out of base currents of the transistors (-).

Light emitting element drive circuit

A semiconductor integrated circuit, including: a logic section; an initiating current generating section for generating initiating current for initiating or re-initiating a circuit when the circuit is to be initiated or the circuit operates abnormally; an initiating current detecting section for detecting the initiating current of the initiating current generating section and outputting a detection signal indicating whether or not the initiating current generating section operates normally; and a signal selection section for selecting one of the detection signal and an output from the logic section based on an internal signal of the logic section which is controllable from outside of the logic section, and outputting the selected one to a terminal.

Semiconductor integrated circuit, test method and electronic information device

A variable resistor is connected to each terminal of (2^n)&#x2212;1 resistors R connected in series. The variable resistors have resistances RH and RL determined according to a digital signal containing m lower bits LoB&#x3c;m&#x2212;1:0&#x3e;.

D/A converter and reference voltage circuit including same

It is an object of the present invention to provide an output circuit capable of reducing a consumption current while an output current is suppressed in a case where limitation is placed on an output voltage so as not to fall to a predetermined voltage or less in an output circuit the emitter of which is grounded, the base of which serves as an input node for a control current and the collector of which serves as an output node. Provided are a base current supply section for supplying a base current to the output transistor according to an input signal from the outside, and a base current control section for detecting an inter-terminal voltage between the collector and emitter of the output transistor to control a base current supplied from the base current supply section so as not to cause the inter-terminal voltage to fall to a value lower than a predetermined voltage.

Growing community of inventors

Osaka, Japan

Hideki Shioe