看到（紅外線）紅色

　　看到（紅外線）紅色

　　新威智能紅外傳感器能夠輕松集成到一個范圍廣泛的設計。低成本的評估工具使它更容易。

　　多虧了穆爾的Law，電子產(chǎn)品不斷提高他們的智商。隨著越來越多的MIPS和兆字節(jié)的軟件下遮光罩，設計師有前所未有的處理能力水龍頭。但這僅僅是在添加令人信服的新產(chǎn)品特性時的一部分答案。壓縮數(shù)據(jù)的能力是好的，但前提是我們能在第一時間捕捉到有趣的數(shù)據(jù)。

　　舉例來說，這些天來觸摸感應風靡一時。那么，設計師為安可做些什么呢？一個明顯的裝飾是賦予裝置感知接近的能力。進入威vcnl4000 IR（紅外）接近傳感器（見圖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.