Passive matrix type display device

A passive matrix type display device comprising:

• a display unit having a display area, wherein the display area has first and second directions, which intersect with each other;
• a plurality of first electrodes disposed on the display area, wherein the plurality of first electrodes is arranged along with the second direction at predetermined first intervals, wherein each first electrode is capable of switching between a conductive state and a non-conductive state, wherein the first electrode in the conductive state is capable of passing a driving current so that the conductive state provides a light-emitting connection, and wherein the first electrode in the non-conductive state is capable of intercepting the driving current so that the non-conductive state provides a non-light-emitting connection;
• a plurality of second electrodes disposed on the display area, wherein the plurality of second electrodes is arranged along with the first direction at predetermined second intervals;
• a driving current source for controlling the driving current in a predetermined range and supplying the driving current to the plurality of second electrodes, wherein the driving current source is coupled with the plurality of second electrodes in a switchable manner between the conductive state and the non-conductive state;
• a plurality of light-emitting elements disposed on the display area, wherein each light-emitting element is disposed at an intersection between the first electrode and the second electrode so that the light-emitting element provides a pixel;
• a first circuit for selecting a part of the plurality of first electrodes, for controlling the part of the plurality of first electrodes to be in the conductive state, and for changing the part of the plurality of first electrodes sequentially so that the first circuit scans the plurality of first electrodes in a predetermined scanning period;
• a second circuit for deciding a part of the plurality of second electrodes with respect to the scanning period, the part of the plurality of second electrodes corresponding to a part of the plurality of light-emitting elements for emitting a light, and for connecting the part of the plurality of second electrodes to the driving current source with respect to the scanning period;
• a plurality of light-emission adjustment elements disposed on a part of the display unit other than the display area, wherein each adjustment element is coupled with the second electrode to be in parallel with the light-emitting element so that a part of the driving current passing through the second electrode branches from the other part of the driving current to be supplied to the light-emitting element, and wherein the part of the driving current provides an adjustment current;
• and
• a light-emission adjustment controller for controlling the light to be emitted from each light-emitting element in such a manner that the light-emission adjustment controller controls the adjustment current passing through each light-emission adjustment element so that the other part of the driving current to be supplied to the light-emitting element is adjusted.