An electronic system and a control method thereof are provided. The electronic system includes a first device, a second device and a control device. The first device includes a first processor and a first control module, and the first control module is electrically connected to the first processor. The second device is detachably disposed on the first device. The second device includes a second processor and a second control module, and the second control module is electrically connected to the second processor. The control device is detachably connected to the second device, and the first device, the second device and the control device are coupled to each other.

An electronic device and a usage method thereof are provided. The electronic device includes a first device, a second device and a control device. The first device includes a first processor and a first control module, and the first control module is electrically connected to the first processor. The second device is detachably disposed on the first device. The second device includes a second processor and a second control module, and the second control module is electrically connected to the second processor. The control device is detachably connected to the second device, and the first device, the second device and the control device are coupled to each other.

Disclosed are structures, devices, methods and systems for providing dynamically variable internal illumination to individual input devices of an electronic device, such as keys of a keyboard. In some embodiments, input devices contain multiple LEDs whose light intensity may be varied to alter a tone or a color of light used for the internal illumination a key. The LEDs may be micro LEDs and may be internal components of the input device as a unit. In some embodiments, the LEDs are white light LEDs having different phosphor thicknesses. In some embodiments the LEDs may be RGB LEDs, with individual control of color contributions to modify the internal illumination. Systems incorporating such input devices may need only a reduced set of LED control units. Systems can include a processing unit and a light sensor or camera to detect ambient lighting and adjust internal illumination of an input device accordingly.

A utilizing function apparatus include at least one processor, and a memory storing instructions that, when executed by the at least one processor, causes the at least one processor to, based on an operation, set one of at least one function temporarily unable to be executed, when it is detected that the utilizing function apparatus is connected to an external device after setting the one function temporarily unable to be executed, acquire information about an area of the memory of the utilizing function apparatus, as first information, when it is detected that the connection with the external device is released, acquire the information about the area of the memory, as second information, and when the acquired first information and second information are different, set the one function back able to be executed.

Disclosed are structures, devices, methods and systems for providing dynamically variable internal illumination to individual input devices of an electronic device, such as keys of a keyboard. In some embodiments, input devices contain multiple LEDs whose light intensity may be varied to alter a tone or a color of light used for the internal illumination a key. The LEDs may be micro LEDs and may be internal components of the input device as a unit. In some embodiments, the LEDs are white light LEDs having different phosphor thicknesses. In some embodiments the LEDs may be RGB LEDs, with individual control of color contributions to modify the internal illumination. Systems incorporating such input devices may need only a reduced set of LED control units. Systems can include a processing unit and a light sensor or camera to detect ambient lighting and adjust internal illumination of an input device accordingly.

A finger-wearable computing device comprises a ring base configured to be worn on a finger of a wearer's hand, a processor housed within the ring base, and a display screen.

A notebook computer includes a display screen, a base, a rotating shaft coupling the display screen and the base, and a rotating shaft support disposed at an inside of a housing of the display screen and coupled to the rotating shaft in an assembly manner. The notebook computer further includes a drive circuit board disposed inside the housing of the display screen. The rotating shaft support includes a first rotating shaft support and a second rotating shaft support. A projection of the rive circuit board and a projection of the first rotating shaft support do not overlap on a place on which the display screen is located, and the projection of the drive circuit board and a projection of the second rotating shaft support at least partially overlap on the plane on which the display screen is located.

A finger-wearable computing device comprises a ring base configured to be worn on a finger of a wearer's hand, and a track pad supported by the ring base and configured to detect a location of engagement between a marker point on a thumb of the wearer's hand and the track pad. The finger-wearable computing device is configured to generate a command signal indicative of the location of engagement for controlling a component of the finger-wearable computing device or for controlling a remote electronic device.

A calculation device comprises a display including both a first display area and a second display area, and a processor being configured to accept operations of at least one of a tax calculation key which are associated with a plurality of tax rates, respectively, to display, when the operation of the tax calculation key associated with any one of the plurality of tax rates was accepted with respect to numerical value data which indicates tax-excluded amount data displayed on the first display area, tax-included amount data on the first display area, the tax-included amount data being calculated based on the tax rate corresponding to the tax calculation key; and to display, on the second display area, tax-included total amount data which indicates a total of the tax-included amount data corresponding to at least one of the numerical value data.

A utilizing function apparatus include at least one processor, and a memory storing instructions that, when executed by the at least one processor, causes the at least one processor to, based on an operation, set one of at least one function temporarily unable to be executed, when it is detected that the utilizing function apparatus is connected to an external device after setting the one function temporarily unable to be executed, acquire information about an area of the memory of the utilizing function apparatus, as first information, when it is detected that the connection with the external device is released, acquire the information about the area of the memory, as second information, and when the acquired first information and second information are different, set the one function back able to be executed.