This paper presents features and expanding tendency of Complex Programmable Logic Device (CPLD), discusses gray scale scanning methods of LED large screen, presents a control circuit design of 256x 256 gray scale video controller with CPLD.

This paper discusses several methods of gray scale scanning for the large LED screen,and presents a control circuit design of the 256*256 gray scale video control system with CPLD.

The optimal distance among casing connection and probe can be further researched and the relationship between arrayed probes and scan speed can be demonstrated more clearly from this arrayed system.

Calibration of scanning time and scanning velocity for high speed imageconverter camera;

From the view of theory and practice, it presents that laser output power P, scanning velocity V and the diameter of faculae E are fundamental technological parameters in treatment with laser.

The results show that were different from power density and scanning velocity its in the surface of hardening layer microstructures and properties also different from, when power density W>4.

Influence of laser scanning speeds on microstructure and properties of cladding layer WC-B_4C-SiC-Co;

Influence of scanning speeds on microstructure and properties of laser cladding WC-B_4C-Co;

Influence of Scanning Speed on Mold Shrinkage of Nylon 6 Prepared by Selective Laser Sintering;

The relation between unit and value of polarography deviate wave and current datum and sweep speed;

Measuring sweep speed and sweep nonlinearity of optic streak camera;

Experimental calibration of sweep speed for optic streak camera;