A SYSTEM AND METHOD FOR ACHIEVING UNIFORM SCREEN BRIGHTNESS WITHIN A MATRIX DISPLAY

摘要

A system and method for producing uniform energy dissipation in display pixels (290, 292) with widely varying electrical characteristics in order to equalize light output and improve yield within a matrix addressable display panel (192). The present invention is implemented within a driver circuit utilizing the concept of current integration. A reference voltage, which is proportional to the most efficient pixel within the display is compared to the energy dissipated within a particular pixel during illumination of that pixel. A current mirror circuit (303) supplies a current equivalent to the current provided to the object pixel to an integrator circuit resulting in a rising voltage within the integrator circuit. The rising voltage is proportional to the energy being dissipated within the current pixel. Once the rising voltage is equal to or greater than the reference voltage, current is removed from the object pixel.