看到（红外线）红色

　　看到（红外线）红色

　　新威智能红外传感器能够轻松集成到一个范围广泛的设计。低成本的评估工具使它更容易。

　　多亏了穆尔的Law，电子产品不断提高他们的智商。随着越来越多的MIPS和兆字节的软件下遮光罩，设计师有前所未有的处理能力水龙头。但这仅仅是在添加令人信服的新产品特性时的一部分答案。压缩数据的能力是好的，但前提是我们能在第一时间捕捉到有趣的数据。

　　举例来说，这些天来触摸感应风靡一时。那么，设计师为安可做些什么呢？一个明显的装饰是赋予装置感知接近的能力。进入威vcnl4000 IR（红外）接近传感器（见图1）。

　　The idea of using IR to sense proximity isn‘t new and the concept is easy to understand. Just use an IR LED to illuminate the area of interest and then measure the amount of reflected light with an IR photodiode. The higher the reflection， the closer （and/or larger， and/or more reflective） an object is.

　　Going one step further， the VCNL4000 also integrates a visible wavelength photodiode for ambient light sensing （see Figure 1）。 The combination of IR proximity detection and visible light sensing makes the module a natural for handheld gadgets. For example， in a cell phone， the visible light detector could be used to automatically adjust the display’s backlight level. Meanwhile， the IR proximity feature could be used to detect that the phone is being held to the user‘s ear， at which point the display could be completely turned off to conserve power.