| 摘要 |
PROBLEM TO BE SOLVED: To obtain a high quality display picture, in which both luminance and color tone elements are simultaneously made uniform, by providing a color mix ratio compensating means which compensates for light emission luminance and color tone with respect to the fluctuation in the light emitting wavelength of light emitting elements and makes the elements display. SOLUTION: A current value measuring circuit 5 always measures the current supplied to the LEDs of a full color display 7. A color coordinate discriminating circuit 4 discriminates the face that in which color coordinates R, G and B data are located, when the LEDs of R, G and B of respective luminance ranks are used, from current value vs. color coordinate correlation data ROM 3 based on the measured values obtained by the circuit 5. The ROM 3 outputs the color coordinates of the LEDs of respective colors based on the correlation data in accordance with the current value supplied to each LED inputted from the circuit 5. The data of the color coordinates outputted from the ROM 3 are inputted to a color mix ratio adjusting circuit 6. |
