A rotary actuator includes a cylindrical main body and an actuating handle which is placed on the cylindrical main body. The actuating handle includes a display area that can be illuminated. A light source is arranged in the cylindrical main body and emits light that is reflected via a first reflection surface onto a first section of the display area.

A laundry treating apparatus is described. The laundry treating apparatus includes a plurality of light emitting diodes (LEDs) mounted on a printed circuit board (PCB). The laundry treating apparatus further includes a light guide that includes an inner wall and an outer wall and ribs located between the inner wall and the outer wall, the ribs defining cells that are configured to accommodate the plurality of LEDs. The laundry treating apparatus further includes a window that is configured to allow light emitted from the plurality of LEDs to pass through. Each rib includes a ridge portion that decreases in thickness toward the window and is pointed toward the window.

A knob assembly with a display that displays information such as power level and a timer time, and a cooking apparatus including a knob assembly are provided. The knob assembly may include a knob coupled to an adjustment shaft configured to adjust power level and a knob ring configured to surround a periphery of the knob, configured to be rotatable independent of the knob, and provided with a display. The display may be provided at the knob ring, and information may be displayed on the display so that a user may easily manipulate the knob assembly.

A control device configured for use in a load control system to control an external electrical load may provide simple feedback regarding the operation of the control device. For example, the control device may comprise a base portion configured to be mounted to an electrical wallbox or over a mechanical switch, and a control unit connected to the base portion. The control unit may comprise a rotation portion rotatable with respect to the base portion, an actuation portion, and a light source. The control unit may be configured to control the light source to illuminate at least an illuminated portion of the actuation portion in response to actuations of the rotation portion and the actuation portion. In addition, the control unit may provide a limit indication on the illuminated portion by blinking the illuminated portion when the electrical load has reached a limit.

A multi-directional operation switch that can be miniaturized is provided. The multi-directional operation switch includes an operation rod that is rotatable about an operation rod axis, and is also tiltable. The operation rod has an inner end portion inserted in a hole in a circuit substrate, and a slider, which operates in conjunction with an operation of the operation rod, is provided on the inner end portion. The slider has a movable contact. The circuit substrate has a plurality of fixed contacts that are brought into contact with, and are electrically connected to, the movable contact when the slider rotates or slides.

An input operation device according to the present disclosure includes first to third light-emitting sections, a first light guide body, and a second light guide body. A lower end of the first light guide body faces the first light-emitting section and the second light-emitting section. The first mark emits light on the first light guide body when light is incident on the first light guide body from the first light-emitting section, and the second mark emits light on the first light guide body when light is incident on the first light guide body from the second light-emitting section. The upper surface section of the second light guide body emits light when light is incident on the second light guide body from the third light-emitting section. At least one of the first light-emitting section, the second light-emitting section, and the third light-emitting section can change light emission luminance.

Various arrangements for light distribution incorporated as part of a device are presented. A circular light guide may be used that receives light from a plurality of light emitters that can be arranged in a circular pattern. A conical reflector may be used and may be positioned to reflect light emitted from the circular light guide onto an exterior of a case of the device. The conical reflector may reflect light such that light is reflected by the exterior of the case in the shape of a halo into an ambient environment of the device.

A rechargeable battery jump starting device with a control switch (e.g. rotary control switch) and an optical position sensing switch system to determine the position of the control switch. The optical position sensing switch system includes an optical position sensor using optical coupling to insure the integrity of isolation on the 12V to 24V master switch to allow for a safe and effective operation, and configured so that the microcontroller unit reads the position on the master switch.

A rechargeable battery jump starting device with a leapfrog charging system. The leapfrog charging system, for example, can sequentially charge multiple batteries of the rechargeable battery jump starting device.

An operating panel device includes an operating ring, and a display device which is disposed to face a back surface of the operating ring. The display device includes a first portion, a second portion, and a third portion. The first portion is located inside the operating ring, and the second portion is located outside the operating ring. The third portion connects the first portion and the second portion. A display of the first portion changes in conjunction with a rotational operation applied to the operating ring.