Patent ID: 8199139

Claim:
A display comprising: a display device that comprises a plurality of colors of picture elements, each of which is driven in accordance with an image to be displayed; and a viewing angle control device that is arranged on at least one of a back and a front of the display device and controls a viewing angle of the display device, wherein the viewing angle control device comprises: a pair of substrates, each of which includes at least an electrode and an alignment film; liquid crystal sandwiched between the pair of substrates; a driving circuit for applying a voltage to the electrodes provided on the pair of substrates; and a pair of polarizers provided so as to sandwich the pair of substrates therebetween, wherein the driving circuit switches a voltage to be applied to the electrodes, thereby switching a range of the viewing angle in which a display of the display device can be viewed, between a first state providing a first viewing angle range and a second state providing a second viewing angle range that is within the first viewing angle range and narrower than the first viewing angle range, wherein the electrode of at least one of the pair of substrates of the viewing angle control device is provided so that a portion corresponding to at least one color of the picture element of the display device is electrically independent of portions corresponding to the other colors of the picture elements, and wherein the driving circuit of the viewing angle control device applies an alternating-current voltage to the portion of the electrode corresponding to at least one color of the picture element of the display device so that a frequency of the alternating-current voltage differs from frequencies of alternating-current voltages applied to the portions of the electrode corresponding to the other colors of the picture elements, thereby adjusting voltage-transmittance characteristics of the liquid crystal of the viewing angle control device.