Bit lines BL of a DRAM that are narrowed to 0. A first write back selection is made. The radio frequency receive signal includes PIM distortion that is a non-linear function of the radio frequency transmit signal output by the transmitter. At least one independently-controllable light-emitting element has at least two commonly-controlled portions that together emit substantially white light to form a white sub-pixel. External air is introduced through the external air suction port 210.