Ink-jet print apparatus and method

An ink jet print apparatus, comprising:

• first to third head portions configured to form red, green, and blue color filters on a substrate;
• a plurality of nozzles provided in each of the first to third head portions;
• a camera, above the substrate, configured to photograph a transmittance of each of sub-pixels in which the red, green, and blue are formed;
• a light emission unit, under the substrate opposite to the camera, configured to emit light on the sub-pixel;
• and
• an injection quantity control unit configured to compare the transmittance of each sub-pixel photographed by the camera with a previously prepared reference transmittance and to compensate the injection quantity of the nozzle,
• wherein the camera includes a plurality of charge coupled devices such that the transmittance of the red, green, and blue color filters measured all at once,
• wherein the injection quantity control unit includes a controller configured to identify a poor sub-pixel based on the transmittance of each sub-pixel photographed by the camera and a nozzle jet compensator configured to adjust the quantity of a color filter material which is injected into each poor sub-pixel and the injection quantity of the respective nozzle according to a compensation setting value which is calculated on the basis of the transmittance of the poor sub-pixel by the controller,
• wherein the each of the plurality of nozzles has the compensation setting value updated by the nozzle jet compensator and the injection quantity designated by the compensation setting value, and
• wherein the controller receives transmittance measurement data for each sub-pixel photographed by the camera,
• wherein the controller compares the transmittance measurement data of each sub-pixel, which is input from the camera, with a reference transmittance data and identifies poor sub-pixels having the transmittance measure data different from the reference transmittance data, and
• wherein the controller calculates the compensation setting value for the poor sub-pixels by to compare the transmittance of each sub-pixel photographed by the camera with a previously prepared reference transmittance.