| 摘要 |
When a full-color display is to be performed, the upper 4-bit data of each of R, G, and B video data each having an 8-bit width is used as video data of a TFT type LCD in which a full-color display is to be performed, and the lower 4-bit data is supplied to a frame rate controller (36) arranged to control an STN type LCD. For this reason, 16 gray scale levels expressed by the upper 4-bit data are combined to 16 gray scale levels expressed by the frame rate controller (36), and each of R, G, and B video data can be emulatively expressed on the 16-gray-scale TFT type LCD in 256 gray scale levels. When the frame rate controller (36) is used for a full-color emulation, the full-color display can be realized without increasing the number of circuits.
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