2results about How to "Refresh fast" patented technology

The electronic paper driving method and electronic paper device and their computer-readable storage medium include a K1 driving waveform and a K2 driving waveform; the K1 driving waveform includes an old image preparation stage and an A display stage; the K2 driving waveform includes an old image preparation stage, an A display stage, a waiting stage, and a B display stage; when displaying images U1 and U2, if the display interval between images U1 and U2 is greater than a set time T, the driving waveforms for both images U1 and U2 use the K1 driving waveform; when displaying images U1 and U2, if the interval between images U1 and U2 is less than a set time T, the driving waveforms for both images U1 and U2 use the K2 driving waveform; the U1 image is displayed in the A display stage, and the U2 image is displayed in the B display stage.

The invention aims to disclose an expansion bus system for expansion of a programmable logic controller, and relates to the technical field of signal transmission. At least one slave station module; wherein the master station module and the slave station modules are sequentially cascaded to form a closed annular data link, and the annular data link forms an expansion bus; the expansion bus adopts a differential high-speed physical layer and LVDS (Low Voltage Differential Signaling) transceiving circuits arranged in the master station module and the slave station modules; the master station module comprises a master control processor and a master station programmable logic device. The master station programmable logic device comprises an expansion bus sending interface and an expansion bus receiving interface which are used for being connected with an expansion bus. According to the invention, the communication efficiency, the anti-interference capability, the real-time performance and the system expansibility are obviously improved, and the requirements of a modern industrial control system on a high-performance expansion link can be met.