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    • 8. 发明专利
    • LIQUID CRYSTAL DISPLAY CONTROLLER
    • JPH02163792A
    • 1990-06-25
    • JP31842288
    • 1988-12-19
    • HITACHI LTDHITACHI COMPUTER ENG
    • TADOKORO TAKASHIMUTO KEIICHIUENO TOMOICHI
    • G02F1/133G09G3/36
    • PURPOSE:To make a display of high quality with simple logic constitution by providing a buffer memory for storing display data and performing high- accuracy display control corresponding to brightness information. CONSTITUTION:Display data which is outputted from the external display controller is inputted to a memory data generating circuit 2. The circuit 2 converts the input data into parallel data suitably to writing to buffer memories 5 and 5'. The memories 5 and 5' are provided as many as image planes consisting of bits as many as bits corresponding to brightness information of an image to be displayed for one display image plane. Further, the circuit 2 writes the data in the memories 5 and 5' under the control of a memory control circuit 3 and also sends display data to an LCD control circuit 4. Here, the display data of the memories 5 and 5' or circuit 2 are switched and selected at intervals of a vertical scan under the control of the circuit 3. Consequently, buffer memory access in an image plane is decentralized, so the image plane is prevented from flickering and the display of good quality can be made.