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首页> 外文会议>International Conference on Electron Devices and Solid-State Circuits >The Design and Implementation for LED Driver IC Based on Double-frequency OS-PWM Algorithm
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The Design and Implementation for LED Driver IC Based on Double-frequency OS-PWM Algorithm

机译：基于双频OS-PWM算法的LED驱动器IC的设计与实现

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摘要

A multi-line constant current LED driver chip based on double-frequency OS-PWM algorithm is presented in this paper. The low refresh rate, low gray level color cast, ghost, the first dim line and open road cross problems which are all commonly seen in fine pitch LED display are focused in this chip. The refresh rate is increased by scrambling the display period evenly through OS-PWM algorithm without changing total gray level. The different levels of optimization are provided to achieve uniformity in low gray level. The enough time is left for the capacitor to be discharged to solve the first dim line problem. An open detect module is inbuilt for eliminating open road cross problem. The test results proved that the design of the chip is correct and reasonable.
机译：提出了一种基于双频OS-PWM算法的多线恒流LED驱动芯片。该芯片专注于低刷新率，低灰度色偏，重影，第一条暗线和开路交叉问题，这些都是在细间距LED显示屏中常见的问题。通过OS-PWM算法在不改变总灰度的情况下均匀地扰乱显示周期，可以提高刷新率。提供了不同级别的优化，以实现低灰度级的均匀性。留出足够的时间使电容器放电，以解决第一个暗线问题。内置了开放检测模块，用于消除开放道路交叉问题。测试结果证明该芯片的设计是正确合理的。

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