VizWorld.com

Last week we brought you news of the “Google Nexus One OLED Display ShootOut” from the guys at DisplayMate, which showed that the display was lacking in features, resolution, and brightness compared to the LCD iPhone 3Gs Screen.  Well, the OLED Association has responded saying that while Dr. Soneira found some important issues, his test wasn’t entirely accurate given the technology of OLED.

Dr. Soneira compared images using his own test equipment and concluded that the images on the Nexus I had some serious flaws and showed these images in his report. His diagnosis was that the PenTile OLED subpixel arrangement, the 6-bit color depth, (really 5-6-5) and the high color saturation in the OLEDs were the cause. The Nexus I, however, has a feature that allows the system to use modes of both 5-6-5 bit or 8 bit color depth depending on the image and the designer’s choice. Typically, 8-bits are invoked when the user touches the screen. While Dr. Soneira acknowledges that nonbandwidth-limited content of text, icons and graphics are very crisp, he seems to indicate that the less challenging bandwidth-limited image content is less well rendered. He suggests that the PenTile configuration somehow reduces the resolution and limits the gray scale. This conclusion is just incorrect.

OLED-Display.net has the full response, although it’s a bit difficult to read.  I invite Barry Young to send us his rebuttal so that we can post it here as well, hopefully with some better formatting.

via OLED-Association analyse Google Nexus One OLED Display Shoot-Out.

Hardware mobile, nexus, oled

The Google Nexus One Android phone is the pinnacle of Android mobile handsets, and boasts one of the new OLED screens in use in readily available mobile handsets.  However, just how good is the screen?  The guys at DisplayMate took a very in-depth and scientific approach and compared it to various displays, mostly the iPhone 3GS LCD, and found it woefully lacking.  This summary says it all:

OLED displays are at the leading edge of display technology – they are still under development and still being perfected as a production display for use in consumer products. That’s interesting, but they still need to be judged in comparison to LCDs, which are the dominant display technology in all current mobile devices. In that regard, if the Nexus One display were an LCD it would rank among the worst displays we have ever seen in a shipping product. Some of this is undoubtedly due to poor integration of the display hardware with the Android OS and software. Much of it, however, is simply due to very poor factory calibration and quality control, especially with the lack of any credible color and gray scale calibration

Their tests include details on the PenTile pixel arrangement in use, the color-depth, and image qualities.  The tests are still underway, as well, so keep checking back for upcoming results on color temperature, gamuts, and color shifts.

via Google Nexus One OLED Display Shoot-Out.

Hardware mobile, nexus, oled

The previously mentioned “Nexus” toolsuite for GPU/CPU Debugging inside of Visual Studio was formally announced today at the NVidia GTC to the attendees.  Some new details:

NVIDIA Nexus radically improves productivity by enabling developers of GPU computing applications to use the popular Microsoft Visual Studio-based tools and workflow in a transparent manner, without having to create a separate version of the application that incorporates diagnostic software calls. NVIDIA Nexus also includes the ability to run the code remotely on a different computer. Nexus includes advanced tools for simultaneously analyzing efficiency, performance, and speed of both the graphics processing unit (GPU) and central processing unit (CPU) to give developers immediate insight into how co-processing affects their applications.

The Nexus suite comes with 3 components:

• Nexus Debugger – source code debugger for GPU source code
• Nexus Analyzer – System-wide event viewer for both GPU & CPU events
• Nexus Graphics Inspector – for deep inspection of textures and geometry

Read the full announcement after the break.

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Hardware gpgpu, gtc, nexus, nvidia, visual studio

NVidia has just announced a new toolsuite named “Nexus” that allows debugging of GPU code (like CUDA or OpenCL) directly within Visual Studio 2009.

NEXUS introduces native GPU debugging and platform-wide performance analysis tools for both computing and graphics developers, fully integrated into Visual Studio 2008.

More information about NEXUS will be available at the GPU Technology Conference, Sept 30th – Oct 2nd, 2009.

They have a demonstration video showing interactive breakpoints, watches, memory analysis, profiling, and more.  In addition to debugging GPU-computing code, they also show using it to debug rendering via texture and frame analysis.  See the video after the break.

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Hardware, Science conference, cuda, debug, nexus, nvidia, opencl, visual studio