Seiko Instruments Inc

Hitachi, Ltd.

Hitachi Cable, Inc.

Kentaro Yagi

Shuhei Yamamoto

Masafumi Hoshino

Kiyohiko Tanno

Hiroyuki Fujita

Hideo Hirane

Hirotomo Oniwa

Hisao Iitsuka

Fujio Matsu

A display device includes a liquid crystal panel, a controller, a common driver and a segment driver. The common driver is powered by a high power supply voltage and outputs row driving waveforms having predetermined voltage levels, which are relatively high. The segment driver is powered by a low power supply voltage and outputs column driving waveforms having predetermined voltage levels, which are relatively low. By this construction, it is not necessary for both the segment and common drivers to be high withstand voltage integrated circuit devices.

Display device

A driving circuit for a light emitting diode array, which is divided into a plurality of drivers for every driving output and so constructed that the control of the sum of the currents flowing therethrough is set by selecting one or a plurality of the divided drivers by using digital signals '1' and '0'.

Driving circuit for a light emitting diode array

Growing community of inventors

Ichikawa, Japan

Kentaro Yagi