Display control unit and display control method thereof
    2.
    发明授权
    Display control unit and display control method thereof 失效
    显示控制单元及其显示控制方法

    公开(公告)号:US5574483A

    公开(公告)日:1996-11-12

    申请号:US115038

    申请日:1993-09-01

    摘要: A display control unit has a display data memory such as a video RAM for storing display data displayed in pixels of a display unit and has a control section for repeatedly reading the display data stored to the display data memory when the display data are outputted to the display unit. The control section has a bit judging section for judging whether all bits of the display data read at one time from the display data memory are the same or not and has a status memory for storing judging results of the bit judging section and a bit kind of the display data judged as the same bits. The control section confirms registered contents of the status memory and reads the bit kind registered to the status memory instead of the display data stored to the display data memory when all the bits of the display data are the same. In accordance with this structure, power consumption of the display control unit is reduced by reducing the number of reading operations of the display data from the video RAM. A display control method for controlling an operation of the display control unit is also shown.

    摘要翻译: 显示控制单元具有诸如视频RAM的显示数据存储器,用于存储显示在显示单元的像素中的显示数据,并且具有控制部分,当显示数据输出到显示数据存储器时,重复读取存储到显示数据存储器的显示数据 显示单元。 控制部分具有比特判断部分,用于判断从显示数据存储器一次读取的显示数据的所有比特是否相同,并且具有用于存储比特判断部分的判断结果的状态存储器和位类型 显示数据被判断为相同的位。 当显示数据的所有比特相同时,控制部分确认状态存储器的登记内容,并读取登记在状态存储器中的比特种类而不是存储到显示数据存储器的显示数据。 根据该结构,通过减少来自视频RAM的显示数据的读取操作次数来减少显示控制单元的功耗。 还示出了用于控制显示控制单元的操作的显示控制方法。

    Display control system
    3.
    发明授权
    Display control system 失效
    显示控制系统

    公开(公告)号:US5459833A

    公开(公告)日:1995-10-17

    申请号:US166887

    申请日:1993-12-15

    摘要: A display control system for a notebook type personal computer, word processor or similar electronic apparatus requiring a power saving implementation. The system has a first memory for storing graphic data, and a control section for reading the graphic data out of the first memory repetitively. The control section has a circuit for determining whether or not the graphic data each being stored in a respective address of the first memory to be displayed side by side in a picture of the display are identical with each other, and a second memory for memorizing whether or not the data are identical with each other. When the content of the second memory is representative of identity of graphic data, the control section causes the graphic data to be displayed without reading the first memory, thereby reducing the power consumption of the system.

    摘要翻译: 一种用于笔记本型个人计算机,文字处理器或类似电子设备的显示控制系统,其需要省电实现。 该系统具有用于存储图形数据的第一存储器和用于重复地读出第一存储器中的图形数据的控制部分。 控制部分具有一个电路,用于确定在显示器的图像中并排显示的要存储在第一存储器的相应地址中的图形数据是否彼此相同;以及第二存储器,用于存储是否存储 或者数据不相同。 当第二存储器的内容代表图形数据的标识时,控制部分使得图形数据被显示而不读取第一存储器,从而降低了系统的功耗。