Sharp Kabushiki Kaisha Corporation

Nitto-denko Corporation

Chihiro Watanabe

Naoki Shibata

Hayato Takakura

Kenya Takimoto

A wiring circuit board includes a metal supporting layer, an insulating base layer, and a wiring layer. The wiring circuit board further includes a plurality of streak groove portions disposed on one surface of the metal supporting layer in the thickness direction and a plurality of concave portions depressed in the metal supporting layer in the thickness direction. The plurality of concave portions forms a dot pattern. Each of the dots in the dot pattern has one concave surface. The concave surface has an approximately spherical cap shape or an approximately cone shape.

Wiring circuit board and wiring circuit board assembly

A plurality of LEDs () include an LED group (G) wherein the LEDs are arranged in a row, and at least one LED (T) not in the row. The position of the LED group (G) in a row on a light guide plate () is specified by bringing the LED (T) into contact with the light guide plate ().

Light emitting module, backlight unit and liquid crystal display device

A load driving circuit () according to the present invention, for carrying out PWM control to cause currents of respective light emitting diode lines (--N) connected in parallel, each of the light emitting diode lines (--N) including a plurality of light emitting diodes () connected in series, causes timing at which a current of any one of the light emitting diode lines (--N) is turned on or off to be different from timing at which current(s) of at least another one of the light emitting diode lines (--N) is(are) turned on or off. This makes it possible to provide a load driving circuit which (i) does not have a reduction in a degree of freedom in selecting a frequency of a PWM control signal that is used to control loads, (ii) does not prevent a peripheral circuit from following the PWM control circuit, and (iii) prevents generation of sounds.

Growing community of inventors

Osaka, Japan

Chihiro Watanabe