Abstract: Package structures and methods for manufacturing the same are provided. The package structure includes a first bump structure formed over a first substrate. The first bump structure includes a first pillar layer formed over the first substrate and a first barrier layer formed over the first pillar layer. In addition, the first barrier layer has a first protruding portion laterally extending outside a first edge of the first pillar layer. The package structure further includes a second bump structure bonded to the first bump structure through a solder joint. In addition, the second bump structure includes a second pillar layer formed over a second substrate and a second barrier layer formed over the second pillar layer. The first protruding portion of the first barrier layer is spaced apart from the solder joint.

Abstract: A flyback power converter includes a power transformer, a first lossless voltage conversion circuit, a first low-dropout linear regulator and a secondary side power supply circuit. The first low-dropout linear regulator (LDO) generates a first operation voltage as power supply for being supplied to a sub-operation circuit. The secondary side power supply circuit includes a second lossless voltage conversion circuit and a second LDO. The second LDO generates a second operation voltage. The first operation voltage and the second operation voltage are shunted to a common node. When a first lossless conversion voltage is greater than a first threshold voltage, the second LDO is enabled to generate the second operation voltage to replace the first operation voltage as power supply supplied to the sub-operation circuit; wherein the second lossless conversion voltage is lower than the first lossless switching voltage.

Abstract: A light guiding module includes a light guiding assembly and a plate. The light guiding assembly comprises a base, plural light guiding columns and plural first connection portions. The light guiding column comprises a light inlet end and a light outlet end. The first connection portions are connected between the light guiding columns. The plate comprises a first surface and plural extending portions. The first surface is abutted against the light outlet ends. The extending portions are extended from the first surface. The extending portion includes a first protrusion and a second protrusion. The second protrusions are disposed between the first protrusions and the first surface. A part of the first protrusions and the second protrusions of the extending portions are extended along a first direction, and a rest are extended along a second direction. The first connection portions are disposed between the first protrusions and the second protrusions.