LED显示屏驱动芯片的各类及应用.doc

LED显示屏驱动芯片的各类及应用
Introduction
The LED display screen is mainly a large size flat panel display made of a display unit facturers can produce such chips. Display industry commonly used Motorola (Onsemi), Philips and ST and other manufacturers of products, of which Motorola products better performance.
2. 2 dedicated chip
The chip has characteristics of large output current, constant current, suitable for high current, high quality requirements of the occasion, such as the outdoor full color, indoor full color etc..
The key performance parameters of the special chip has the maximum output current, constant current source output channels, the current output error (bit-bit, ChlP-chip) and data shift clock etc..
Maximum output current
At present, the majority of constant current source chip maximum output current is defined as a single channel maximum output current, usually around 90mA. Constant current is the most fundamental feature of a dedicated chip, and also the basis for high quality images. Each channel outputs the maximum constant current (that is, the maximum constant output current), which is more meaningful to the display, because in the white balance state, each channel is required to output constant current at the same time. The maximum maximum constant current output current is less than the maximum allowable output current.
The constant current source output