減少手機顯示器面板噪音的探討

在現今的社會，手機無疑是使用最頻繁的聯絡工具之一，接聽電話時，清楚的通話音質是必需也是必要的。然而在手機裡，影響接聽音質的地方很多，手機顯示面板所發出的噪音就是其中之一。面板顯示器在手機上算是相當重要的零件之一，它負責傳遞資訊透過影像顯示來表達，讓使用者更清楚的知道所有的訊息。由於結構與組裝的關係，面板會因為驅動顯示產生震動，當震動頻率固定時，如果這頻率在人耳可聽到的範圍內，就會產生面板噪音（Audible Noise），面板發生共振太大，必定將會影響通話品質，於是對於這一方面的探討，成為本論文主要的研究動機。本論文的研究，是探討面板噪音與驅動IC的相關性，利用不同的驅動方式來做量測與比較，最後比較出較好的驅動方法來降低面板噪音。實驗方式是利用FPGA測試板或MCU控制器來撰寫驅動程式，及改變外部硬體電路來測試，並在無響室量測實驗數據結果。

關鍵字

面板噪音；驅動； FPGA ；控制器；無響室

並列摘要

Now in this society, mobile phone is popular using of communication tool. During communication, clear acoustic fidelity is necessary. However, there are many factors to affect acoustic fidelity in mobile phone. One of factor was from LCD display module. LCD display module is very important parts on mobile phone. It can let user know all information through display screen. Due to module structure and assemble issue, LCD panel vibration will be caused by difference driving method. When the frequency of vibration is continually and frequency is during from 20 Hz to 20 KHz, we can call it is an audible noise and it will be heard by human ear. Communication quality will be lower if audible noise is getting more. How to reduce the audible noise will be discussed in this thesis. This thesis is discussing about the relationship between panel noise and LCD driver IC. I measured and compared test data by using difference driving method. Base on those data, a better driving method is proposed. All test are used FPGA evolution board or MCU controller board to write test program, or adopt external hardware circuit for testing, and then measure all data in anechoic room in three party.

並列關鍵字

Audible Noise ； Driver ； Controller ； FPGA ； Anechoic Room

參考文獻

[10]楊士明，液晶顯示器畫面產生抖動閃爍成因探討及解決方法之研究，國立成功大學電機工程學系碩士論文，2004。

[7]Dr. Chuan H. Liu（劉傳璽），Introduction to TFT LCD，2007。

[5]R. Lukac and K. N. Plataniotis, “Color Filter Arrays: Design and Performance Analysis,” IEEE Transactions on Consumer Electronics, vol. 51, no. 4, Nov. 2005.

[13]M. D. Cox and H. H. Guan, “Vibration and Audible Noise of Capacitors Subjected to Nonsinusoidal Waveforms,” IEEE Transactions on Power Delivery, vol. 9, no. 2, Apr. 1994.

[16]Ram W. Sabnis, “Color Filter Technology for Liquid Crystal Displays,” Display, vol. 20, No. 3, Nov. 1999.

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減少手機顯示器面板噪音的探討

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