| 摘要 |
PURPOSE:To achieve a smooth change of contrast of screen according to status, by inputting an up/down signal in a prescribed timing to a counter and gradually changing the output of a picture memory of each color. CONSTITUTION:Contents display on TV stored in picture memories R0-R2, G0- G2 and B0-B2 and outputs Q0-Q2 of a counter 2 are weighted as being specified. The counter 2 is up-down-controlled with a central processing unit to AND of the output of the counter 2 with the output of picture memories, allowing to smoothly change the contrast of screen displayed on a TV display 1 according to the situation. |
