US Patent 7926968 Dual mode luminous ball pen

A dual mode luminous ball pen is disclosed. The luminous pen includes a pen shaft; a tapered transparent tip portion disposed on a proximal end of the shaft; a refill, a switch portion, a lamp, a control portion, and a button. The switch portion disposed inside the pen shaft and connected to the tip portion for rotating a sleeve. The lamp includes at least a cell, a first light emitting diode (LED), and a second LED, and can be rotated together by the sleeve to supply/cut-off a power supplied by the cell to the LEDs. The control portion is disposed on the switch portion to turn on one of the first and second LEDs. The button is depressed into the pen shaft to rotate the control portion.