Abstract: A handwriting data processing method is applied to a pen display having wireless communication function and a data processing device. The handwriting data processing method includes the steps of: the data processing device obtaining a handwriting data from the pen display in a wireless communication manner; the data processing device generating a compressed screen image and transmitting the data of the compressed screen image and the handwriting data, which is not compressed, to the pen display in the wireless communication manner; the pen display uncompressing the data of the compressed screen image and overlapping the uncompressed screen image and the handwriting data to form a complete screen image and displaying the complete screen image. By the handwriting processing method, the machine time of the processor of the pen display is effectively lowered, significantly reducing the delay phenomenon of the displayed handwriting.

Abstract: A handwriting data processing method is applied to a pen display having wireless communication function and a data processing device. The handwriting data processing method includes the steps of: the data processing device obtaining a handwriting data from the pen display in a wireless communication manner; the data processing device generating a compressed screen image and transmitting the data of the compressed screen image and the handwriting data, which is not compressed, to the pen display in the wireless communication manner; the pen display uncompressing the data of the compressed screen image and overlapping the uncompressed screen image and the handwriting data to form a complete screen image and displaying the complete screen image. By the handwriting processing method, the machine time of the processor of the pen display is effectively lowered, significantly reducing the delay phenomenon of the displayed handwriting.

Abstract: A selectable backup power supply device for providing power to a real time clock (RTC) and a memory unit is disclosed. The device includes a backup battery, a first power outputting unit and a second power outputting unit, wherein the backup battery outputs a backup voltage, the first power outputting unit is connected to the backup battery and the RTC for receiving the backup voltage and outputting a first supply voltage to the RTC, and the second power outputting unit is connected to the backup battery and the memory unit, for receiving the backup voltage and, in accordance with a selection signal, outputting a second supply voltage to the memory unit or stopping the output of the second supply voltage.

Abstract: A selectable backup power supply device for providing power to a real time clock (RTC) and a memory unit is disclosed. The device includes a backup battery, a first power outputting unit and a second power outputting unit, wherein the backup battery outputs a backup voltage, the first power outputting unit is connected to the backup battery and the RTC for receiving the backup voltage and outputting a first supply voltage to the RTC, and the second power outputting unit is connected to the backup battery and the memory unit, for receiving the backup voltage and, in accordance with a selection signal, outputting a second supply voltage to the memory unit or stopping the output of the second supply voltage.