使用查找表执行伽玛校正上的LED

摘要： Gamma校正用于纠正亮度和亮度之间的非线性关系。本应用笔记介绍MAXQ2000微控制器（μC）的固定频率PWM信号线性增加和减少LED的亮度，使用伽玛校正书面汇编程序。 PWM占空比，位于实用ROM的内存在一个查找表（LUT）的存储，伽玛纠正，以产生线性亮度变化。使用免费的MAX-IDE开发工具软件编译和MAXQ2000评估板上运行。

Maxim > App Notes > DISPLAY DRIVERS

Keywords: microcontrollers, assembler, LUT, look-up table, gamma correction Nov 16, 2005

APPLICATION NOTE 3667
Using Lookup Tables to Perform Gamma Correction on LEDs

Abstract: Gamma correction is used to correct for the nonlinear relationship between luminance and
brightness. This application note presents an assembly program written for the MAXQ2000 microcontroller
(C) that uses gamma correction with a fixed-frequency PWM signal to linearly increase and decrease the
brightness of an LED. The PWM duty cycles, stored in a Lookup Table (LUT) located in Utility ROM memory, are
gamma corrected to produce linear brightness changes. The software compiles using the free MAX-IDE
development tool and runs on the MAXQ2000 evaluation kit.