Abstract: A remote control device provided with a means for receiving light from a light-emitting element 21 at a light-receiving element 3 and detecting from a signal thereof a movement amount of a mark 16 on a screen 2a of a display device 2 so as to cause movement of the mark such as a pointer on the screen of the display device in response to a movement amount of a light emission point H of the light-emitting element, wherein the light-receiving element is provided with a semiconductor position detection element, and moreover, is configured to be capable of detecting movement of the light emission point in a horizontal direction and a vertical direction, and causes the mark on the screen of the display device to move due to the signal from the light-receiving element.

Abstract: In an embodiment of the present invention, a remote control device is provided with an optical indicator device and a light-receiving device. A display device is provided with a display portion that displays a pointer and a frame portion that accommodates the light-receiving device. By displacing a light-emitting element sequencially to a plurality of displacement positions, supplying a light emission signal to the light-emitting element at each displacement position and to cause the light-emitting element to emit as output a position detection light signal, then sequencially detecting light-reception signals that are received as input by a position detection light-receiving element of the light-receiving device, and performing arithmetic processing as appropriate on the detected light-reception signals, a displacement state of a reference axis displacement angle is detected.

Abstract: In an embodiment of the present invention, a remote control device is provided with an optical indicator device and a light-receiving device, and a display device accommodates the light-receiving device of the remote control device, wherein the optical indicator device emits as output a position detection light signal and a function control light signal, these being transmitted to the light-receiving device. The light-receiving device is provided with a position detection light-receiving element, which is for receiving as input the position detection light signal, and a function control light-receiving element, which is for receiving as input the function control light signal. When the optical indicator device moves, the position detection light signal (light-reception signal), which is received as input by the position detection light-receiving element, tracks the movement thereof and changes accordingly.