| 摘要 |
PURPOSE:To reduce the power consumption at the time of a high display rate without decreasing the easiness of seeing a display by varying the alternation rate of a high and a low contrast image plane at the time of the high display rate with the display rate signal of a plasma display panel (PDP) based upon an external gradation control signal. CONSTITUTION:A display rate recognition part 4 recognizes the display rate of the PDP according to the external gradation control signal 2 and outputs the display rate signal 3 to a display control part 6. Then the control part 6 generates a display control signal 5 for varying the alternation rate of the high contrast image plane and low contrast image plane to less than one vertical period at the time of the high display rate and outputs the signal to a PDP driving part 7. Consequently, the ratio of the high contrast image plane decreases at the time of the high display rate and the number of light pulses is decreased to reduce the power consumption to half. An intermediate and a low gradation brightness image plane, on the other hand, are controlled so that the number of light pulses does not decrease and the power consumption at the time of the high display rate is reduced to half without decreasing the easiness of seeing the display. |
