A mobile phone apparatus is provided with an accelerometer for detecting an attitude and a display for displaying a moving object. The light from a light source is guided past light funnels that are used to illuminate the pointer scale by an optical waveguide. The leading edge of the drive dog seat contacts the base of the imaging machine drive mechanism thus making full contact between the drive dog seat and the imaging machine drive mechanism tooth. The backlight assembly may include one or more specular reflectors and one or more other optical elements to ensure that the light that exits the light chamber has the desired spatial uniformity, polarization, color, andor angular distribution.