| 摘要 |
Gray scale printing data with compensation for dispersion is stored in a first shift register, the data is sliced into respective bits and is fetched by means of a second shift register and AND-gates. Standard resistances are scanned by means of a third shift register and switches, in synchronization with the data retrieval, for changing standard current, and light emitting current to light emitting bodies is changed according to the standard current.
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