| 液晶显示器亮度自动调节系统研究 |
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| 引用本文： | 范伟,叶瑞芳,余卿. 液晶显示器亮度自动调节系统研究[J]. 现代仪器使用与维修, 2011, 0(6): 35-37,29 |
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| 作者姓名： | 范伟 叶瑞芳 余卿 |
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| 作者单位： | 华侨大学机电及自动化学院,厦门361021 |
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| 基金项目： | 国家自然科学基金项目51075160;福建省泉州市科技计划项目G（2011）0054 |
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| 摘 要： | 通过4个wi8442光照传感器分别感受不同方位外部环境光强，经过后续信号处理电路和A/D转换芯片ADC0809，单片机AT89C52通过中断系统扫描键盘输入设定的光强值，控制并刷新系统不断比较实际获得的光强值，由D/A转换芯片DAC0832输出0-5V液晶显示器背景光强控制电压。当环境光强发生变化后，系统可根据数字键盘输入设定的阈值自动调节液晶显示器的背景光强，从而可有效减少人眼长时间面对液晶显示器的视觉疲劳。
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| 关 键 词： | 液晶显示器 光照传感器 光强 调节 |
The research on liquid crystal display brightness automatic adjustment system |
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| Fan Wei Ye Ruifang Yu Qing. The research on liquid crystal display brightness automatic adjustment system[J]. Modern Instruments, 2011, 0(6): 35-37,29 |
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| Authors: | Fan Wei Ye Ruifang Yu Qing |
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| Affiliation: | Fan Wei Ye Ruifang Yu Qing(College of Mechanical Engineering and Automation, Huaqiao University, Xiamen 361021 ) |
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| Abstract: | As the innovation of electronic technology,liquid crystal display has had a wide range of applications and development.Four wi8442 light sensor could feel the external environment light intensity of different directions,through subsequent signal processing circuit and A/D conversion chip ADC0809,single-chip microcomputer AT89C52 could scan the light intensity value set by key board input throught the interrupt system, control and refresh system constantly to compare the external environment light intensity value. |
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| Keywords: | Liquid crystal display Light sensor Light intensity Adjust |
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