Panasonic Intellectual Property Management Co., Ltd.

Suguru Matsumura

Yasutaka Kogetsu

Sadayuki Okazaki

Kazuhiro Hayashi

Masahiko Hirata

Akihisa Yamada

Katsuhisa Wadasaki

Keiichi Zaitsu

Yoshihiro Kawasaki

A battery includes: an electrode group including a first electrode, a second electrode, and a separator interposed between the first electrode and the second electrode; an electrolyte; a container for accommodating the electrode group and the electrolyte; a sealing member for blocking an opening in the container; and a first lead for electrically connecting the first electrode to the sealing member. The first lead has a weld region welded to the sealing member, and the weld region has at least one first bump along the longitudinal direction of the first lead. The cross section of the boundary between the weld region and a non-weld region on the first electrode side has a projecting shape corresponding to the bump.

Battery with lead weld region bump

A surface light source apparatus includes an end face for taking in light emitted from a light source and a main surface for emitting the light. The surface light source apparatus further includes a plurality of structure bodies formed on an opposed surface disposed opposite to the main surface in the surface light source apparatus, each of which has a reflecting surface facing the point light source. Each structure body has a cut-off portion which removes a portion on the reflecting surface in a longitudinal direction of the structure body and in a height direction.

Surface light source apparatus having cut out portions where a reflecting portion is not present

Growing community of inventors

Osaka, Japan

Suguru Matsumura