| 摘要 |
PURPOSE: A device for controlling local luminance is provided to locally adjust luminance of an image display system. CONSTITUTION: A device for controlling local luminance includes a video amplifier(216), an amplification controller(208), a horizontal/vertical composite waveform generator(202), an amplifier(204), and a superposition unit(206,D1). The video amplifier receives a video signal and amplifies the video signal according to a voltage applied to an amplification control terminal of the video amplifier. The amplification controller outputs an amplification control voltage for adjusting luminance of the entire screen. The horizontal/vertical composite waveform generator generates a horizontal/vertical composite waveform corresponding to a local region. The amplifier amplifies the composite waveform. The superposition unit superposes the composite waveform on the amplification control voltage to apply the superposed signal to the amplification control terminal of the video amplifier.
|
