| 摘要 |
<p>PROBLEM TO BE SOLVED: To obtain high-quality full color prints by reducing a white balance deviation corresponding to the number of prints. SOLUTION: In an organic EL element as a light source of this organic EL printing head, an organic layer including light-emitting layers of the same material with each color component of red, green and blue is stacked between an anode and a cathode thereby forming a plurality of light-emitting dots. Each of the light-emitting dots is driven to emit light under the same condition with a constant luminance. A color filter for passing the light from the light- emitting dots of the organic EL element as a dot-shaped light of each color component of red, green and blue shows a nearly constant value when a multiplied value of an emission spectrum intensity of the organic EL element for each color of red, green and blue, a spectral transmittance of the color filter and a spectral sensitivity of a recording medium is integrated by a wavelength.</p> |
