使用簡單觸摸傳感器的有效照明控制

　　Mention ‘touch sensors’ or ‘touch control’ today and most people will tend to think of touchscreen displays， whether these are the cash machines （ATMs） used by banks， the self-scanning checkout terminals in grocery stores， or increasingly our smartphones， tablet computers and e-reader devices. These uses certainly reflect the advances that this technology has brought to our modern life， but not every application requires this level of sophistication and more basic touch sensors still have a role to play in providing convenient， easy-to-use controls. Lighting， for the home， office or factory， is a prime example where often all that is required is the ability to turn lights on and off or apply a simple dimming function. While touch control of lighting is not new， the broader developments in touch sensing have seen a proliferation in dedicated ICs that make it even easier and more cost-effective to design touch controls for lighting.

　　This article will look at the various touch control technologies developed by companies like Atmel （AT42QT1012， AT42QT1010， AT42QT2100）， Freescale （MPR031） and Analog Devices （AD7148）， focusing on the products which are specifically intended to support simple single-touch button， wheel and slider controls. The aim will be to understand the ease with which these devices can be incorporated into lighting applications and the end-user benefits they offer.

　　為什么觸摸控制照明？

　　在考慮觸摸控制可能有利的地方之前，考慮更廣泛的背景下的照明可能有助于欣賞眾多應(yīng)用程序和細(xì)分市場。然后，我們可以著手研究目前部署的開關(guān)和其他控制類型，以了解觸摸傳感技術(shù)的潛在好處可能是什么。

　　如前所述，照明的觸摸控制不是新的。網(wǎng)絡(luò)搜索將不會(huì)返回由消費(fèi)產(chǎn)品和家用照明控制主導(dǎo)的結(jié)果。其中許多是用于心情照明，書桌，桌子和床頭燈和虛榮產(chǎn)品（如照明化妝鏡），但有趣的是，顯然有強(qiáng)烈的需求后市場產(chǎn)品，取代標(biāo)準(zhǔn)的墻壁開關(guān)。那么是什么推動(dòng)了這種需求呢？不可避免的是，沒有一個(gè)單一的答案，它往往不是純粹的實(shí)際或符合人體工程學(xué)的原因-風(fēng)格，復(fù)雜，只是被認(rèn)為是一個(gè)“酷”的技術(shù)提供了一些更感性的反應(yīng)，這個(gè)問題。當(dāng)然，從實(shí)用的角度來看，觸摸臺(tái)燈身體要打開或關(guān)閉可以比摸索容易得多的能力，也許在黑暗中，一個(gè)機(jī)械開關(guān)，可以在燈罩或?qū)?a target='_blank' class='arckwlink_none'>電源線。通?？梢蕴砑右淮巍纱位蛉我赃_(dá)到不同亮度水平的設(shè)備是另一個(gè)好處。這些優(yōu)點(diǎn)擴(kuò)展到墻壁開關(guān)，定位觸摸板可以比操作搖桿或撥動(dòng)開關(guān)或調(diào)光開關(guān)的開關(guān)或滑塊更簡單。電容式觸摸感應(yīng)控制的另一個(gè)好處是，它們可以安全（在較低的電壓下運(yùn)行），用于浴室、廚房或其他潮濕環(huán)境，因此它們可以代替天花板安裝的拉繩開關(guān)。