| 摘要 |
PURPOSE: To reduce the transfer time of gradation data by compressing the gradation data of a picture element expressed in a gradation value. CONSTITUTION: Transmission reception of gradation data are conducted by an 8-bit parallel interface 3. A data compression section 2 converts bits 0 to 5 of 1st byte of transfer data into gradation data of a 1st picture element, and bits 6, 7 of 1st byte of transfer data and bits 0 to 3 of 2nd byte transfer data into gradation data of a 2nd picture element, and converts bits 4-7 of 2nd byte of transfer data and bits 0,1 of 3rd byte of transfer data into gradation data of 3rd picture element and bits 2-7 of 3rd byte of transfer into gradation data of 4th picture element. A data expansion section 4 restores data converted into 8-bit data into 6-bit data. |
