Abstract: Disclosed is an electronic device including a tunable element, a first power supply circuit, and a second power supply circuit. The first power supply circuit and the second power supply circuit are electrically connected to the tunable element. The first power supply circuit drives the tunable element during a first time period. The second power supply circuit drives the tunable element during a second time period.

Abstract: A package structure including a semiconductor die, a redistribution circuit structure and an electronic device is provided. The semiconductor die is laterally encapsulated by an insulating encapsulation. The redistribution circuit structure is disposed on the semiconductor die and the insulating encapsulation. The redistribution circuit structure includes a colored dielectric layer, inter-dielectric layers and redistribution conductive layers embedded in the inter-dielectric layers. The electronic device is disposed over the colored dielectric layer and electrically connected to the redistribution circuit structure.

Abstract: Provided are an actuator, method for manufacturing the actuator, and acoustic transmitter having the actuator. The actuator includes: an elastic metal member having a plurality of curved segments and a plurality of connection segments which constitute a ring structure with a long-axis direction and a short-axis direction; a multilayer piezoelectric member disposed within the ring structure and having a plurality of stacked piezoelectric units along the long-axis direction; and a plurality of coupling members disposed within the ring structure, wherein the multilayer piezoelectric member has two ends in the long-axis direction that are coupled to the connection segments of the elastic metal member in the long-axis direction. A preload stress is imparted to the elastic metal member. A plurality of coupling members having a size corresponding to the preload stress are disposed between the elastic metal member and the multilayer piezoelectric member.

Abstract: A battery module and a battery safety method are provided herein. The battery module includes at least one connection unit and a determining unit. The at least one connection unit is configured to be detachably and electrically connected to an electronic device. The determining unit is configured to determine whether the battery module is detached from the electronic device through the at least one connection unit. When determining that the battery module is detached from the electronic, the determining unit controls the battery module to enter a shipping mode.

Abstract: A battery module and a battery safety method are provided herein. The battery module includes at least one connection unit and a determining unit. The at least one connection unit is configured to be detachably and electrically connected to an electronic device. The determining unit is configured to determine whether the battery module is detached from the electronic device through the at least one connection unit. When determining that the battery module is detached from the electronic, the determining unit controls the battery module to enter a shipping mode.

Abstract: A rear projection display, including a base, a partition, a frame, and an optical engine, is provided. The partition is disposed in the base for defining a system space and a lens adjusting space, wherein the system space and the lens adjusting space are exposed by a front opening on the base. The optical engine is disposed in the system space, and a projection lens of the optical engine protrudes into the lens adjusting space. The frame is disposed on the base for fixing a screen. The focal length can be directly adjusted through the lens adjusting space, and the projection effect can be observed simultaneously from the screen.