Author Archive: Mark Rejhon

About Mark Rejhon

Also known as Chief Blur Buster. Founder of Blur Busters. Inventor of TestUFO. Read more about him on the About Mark page.

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blurbusters.com

How to disassemble an LCD

Posted Oct 21, 2012 by Mark Rejhon Homebrew

Designing a scientifically proper scanning backlight from scratch, for an existing LCD computer monitor, requires disassembling LCD’s. There is an LCD parts store page that has info useful during my research, including a YouTube video on how to disassemble LCD panels...

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blurbusters.com

Sneak preview of Arduino Input Lag Meter!

Posted Oct 18, 2012 by Mark Rejhon

Coming soon: How to build your own Arduino-powered input lag meter using a photodiode! No soldering needed. Cable latency accuracy of +/- 1 microsecond and input lag accuracy of +/- 0.1 millisecond (once zero-calibrated with a CRT display first on the...

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Zero Motion Blur FAQ

Posted Oct 16, 2012 by Mark Rejhon

ARCHIVES: This is an older 2012 FAQ This is an old Blur Busters article from the days before LightBoost. More recent content include LightBoost HOWTO, LightBoost FAQ, Samsung Zero Motion Blur HOWTO, Scanning Backlight FAQ, and Electronics Hacking: Creating a Strobe Backlight. Good...

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blurbusters.com

240 watts of LED backlight for a 23″ computer monitor!

Posted Oct 13, 2012 by Mark Rejhon Homebrew

[This is a very old article from scanning backlight experiments in 2012] A 23″ LCD computer monitor is 286mm high x 508mm wide. From math calculations on LED ribbons (120 LED per meter, 6mm wide, 6500K, ~10watt/meter, 80+CRI available), one can put...

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blurbusters.com

About

Posted Oct 11, 2012 by Mark Rejhon

About Mark Rejhon About This...

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Scanning Backlight FAQ

Posted Oct 9, 2012 by Mark Rejhon

ARCHIVES: This is an older 2012 FAQ Frequently asked questions about flashing backlight technologies (scanning backlights, strobed backlights, black frame insertion), including how they work. Click the questions to see the answers. For info on ULMB / LightBoost / etc,...

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blurbusters.com

Prebuilt high-power switch for Arduino

Posted Oct 9, 2012 by Mark Rejhon Homebrew

Found a pre-made Arduino-compatible MOSFET switch for $18 each. Four of these 4-channel switches will be suitable for a 16-segment Arduino scanning backlight. These can switch well over 100 watts per segment, and at frequencies up to 200,000Hz; fast and...

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TestUFO & Motion Tests

Posted Oct 4, 2012 by Mark Rejhon

This is a list of software and hardware benchmark tools available for testing ghosting and motion blur on LCD displays. We Recommend the Blur Busters UFO Motion Tests: www.testufo.com Other Motion Test Software Tests your browser’s support for VSYNC www.vsynctester.com...

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blurbusters.com

Arduino Photodiode Input Lag Tester

Posted Oct 2, 2012 by Mark Rejhon Homebrew

I have a breakthrough in a millisecond-accurate input lag tester, that is as almost as accurate as using as an oscilloscope and a photodiode. I am creating photographs on how you can construct your own inexpensive Arduino input lag meter....

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Existing HDTV Scanning Backlights

Posted Sep 24, 2012 by Mark Rejhon TV

Some manufacturers have added scanning backlights to their high-end HDTV’s to reduce perceived motion blur. From Sony website (sony.com): “The model also features Sony’s MotionFlow XR 960 featuring a precise backlight control that is synchronized with the liquid crystal movement from frame to...

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blurbusters.com

Benchmark electronics prototyping

Posted Sep 23, 2012 by Mark Rejhon Homebrew

The Arduino and initial components for prototyping have been purchased and assembled. The prototype circuit for an upcoming 16-segment scanning backlight is currently being tested with simple LED’s (LED ribbons will be used instead in the near future). Arduino tests...

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blurbusters.com

Schematic diagram for scanning backlight

Posted Sep 23, 2012 by Mark Rejhon Homebrew

NOTE: This is a very old article. Newer article is Electronics Hacking: Creating a Strobe Backlight. This is a simplified schematic diagram for a home-made scanning backlight driven by an Arduino, an open-source electronics prototyping platform.The Arduino monitors the VSYNC...

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TestUFO Motion Tests

TestUFO Motion Tests