EDN

EDN, May 26, 2011

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The upper PCB's front exposes the camera's LED flash, vibration motor, headphone jack, and other system speaker (see "CES 2011: Texas Instruments helps touchscreens 'play' Stairway to Heaven," EDN, March 10, 2011, http://bit.ly/ gFittL). Handsets typically use a hinge-slider mechanism to stow a physical key- board behind the LCD or OLED (organic light-emitting diode)—as with Google's T-Mobile G1 Android smartphone (see "T Mobile's G1: Google's Android OS emerges," EDN, Sept 22, 2009, pg 22, http://bit.ly/eW8h3q). With the HTC Surround, however, the slider exposes dual speaker grilles, which combine with a back-side stand to transform the smartphone into an audio/video play- back nexus. Support for Dolby Mobile, SRS Wow HD virtual surround, and other audio-enhancement algorithms further ups the multimedia ante, but multiple reviewers' reports indicate that the speakers still sound tinny or are other- wise acoustically deficient. Flipping over the upper PCB, you'll find the other, upper- array microphone. Note that the metal plate-and-holes structure on each speaker directs the transducer's audio output to and through the cor- responding grille elsewhere in the handset's mechanical design. This teardown does not show one key difference between this handset and the Nexus One—the touchscreen controller—because it's embedded within the display, and tearing down to that level would have damaged the handset beyond repair. The Nexus One uses a Synaptics controller, whereas HTC Surround uses Cypress' TrueTouch technology (see "Cypress TrueTouch Solution Drives Touchscreens for HTC's Hot New HTC 7 Surround And HTC 7 Mozart Phones," Cypress Semiconductor, Dec 7, 2010, http://bit. ly/ec4UPT). 26 EDN | MAY 26, 2011

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