Patent ID: 7274363

Claim:
A display panel driving device for driving a display panel formed by a matrix-type arrangement of a plurality of emitting elements supporting pixels, comprising: a drive voltage generator supplying a drive voltage through a power line to each of said plurality of emitting elements; a current measuring part for measuring a current value by fetching a value of current flowing in said power line while causing said emitting elements to independently emit light in succession, with the timing of the light-emission time of each said emitting element, and storing the current values thus acquired in a memory as measured current values each assigned to each pixel; a luminance correction part for obtaining luminance-corrected pixel data by correcting the luminance level indicated by the pixel data of each pixel corresponding to an input image signal, based on said measured current value stored in said memory for one of said pixels according to said pixel data; a light-emission drive part for causing said light-emission elements to emit light only for the period corresponding to said luminance-corrected pixel data during the image display light-emission periods in each frame period in said input image signal, wherein said current measuring part comprises: non-light emission current measuring part for obtaining, as a non-light emission current value, the value of the current flowing in said power line when all said light-emission elements formed in said display panel are extinguished; light-emission current measuring part for obtaining, as a light-emission drive current, the value of current flowing in said power line while causing said emitting elements to independently emit light in succession, with the timing of the light-emission time of each said emitting element; and a part for storing in said memory the result of subtracting said non-light emission current value from said light-emission drive current value, as said measured current value.