LCD motion artifacts are frequently caused by pixel response imperfections. The test at used to take the pictures on this page. Blur Busters is the world’s first blog to utilize a pursuit camera for accurate capture of motion artifacts, in WYSIWYG format, as seen by the human eye. However, Blur Busters has developed an inexpensive pursuit camera method which operates in conjunction with the Blur Busters UFO Motion Tests. It makes possible accurate photography of motion artifacts. These expensive cameras are extremely accurate at measuring motion blur and other artifacts, since they simulate the eye tracking motion of moving eyes. This is simply a camera that follows on-screen motion. Pursuit camera are used by display manufacturers for testing (e.g. Pursuit Camera: Accurate Capture of LCD Motion Artifacts However, it is not a very accurate representation of perceived display motion blur and motion artifacts:Įxample: Stationary camera photo of a moving object on a display. How Were These Images Captured? Stationary Camera: Capture of Pixel TransitionsĪ stationary camera is good for photographing pixel transitions statically. See an animation that demonstrates display motion blur unrelated to speed of pixel transitions. The use of overdrive can also reduce motion blur very slightly, but only up to the limitations of the sample-and-hold effect. Coronas, also known as “overdrive artifacts”, or “inverse ghosting”, is caused by the pixel overshooting its final color value, and rippling (bouncing back) to its final color value. However, excess overdrive can create coronas. Overdrive speeds up the pixel transitions by using higher voltages on the pixels. This creates the differences in motion artifacts on the leading edge versus the trailing edge of moving on-screen objects. LCD pixels often transition faster (or more completely) to a specific color, than back from a specific color. Ghosting is typically caused by the asymmetric speeds of pixel transitions. Without overdrive, LCD displays are prone to ghosting. The motion artifacts are otherwise very similar. Artifacts may show up at lower or higher overdrive settings on another monitor. Different monitors and refresh rates can have different overdrive strengths. Tested monitor: ASUS VG278H, running at 120Hz, using the test at running at 960 pixels/second. Ghosting and coronas are the visible pixel transitions being seen by the human eye. 120Hz, 144Hz, or 240Hz monitor) and/or to use an LCD display with a strobe backlight such as ULMB or LightBoost (see Motion Blur Reduction FAQ) which hides pixel transitions by turning off the backlight between refreshes, as well as reducing motion blur ( 60Hz vs 120Hz vs ULMB).
#Rebaslight lighting free
High overdrive settings can cause coronas to appear.įor ASUS computer monitors with the “Trace Free” adjustment, an excellent compromise setting is usually Trace Free 60, which balances ghosting visibility with corona visibility.Īnother method of reducing the visiblity of ghosting and coronas is to use a faster LCD display (e.g. Low overdrive settings can cause ghosting to appear.Ģ. It is observed there is a trade-off between ghosting and coronas:ġ. Faint corona at left edge of UFO base.ĪSUS TraceFree 80: More visible corona at left edge of UFO base.ĪSUS TraceFree 100: Very visible corona at left edge of UFO base.
Very faint white ghosting at base of UFO.ĪSUS TraceFree 60: Ghosting is now gone. Preview of NVIDIA G-SYNC, Part #2 (Input Lag)Īnimation of Asus Trace Free settings 0, 20, 40, 60, 80 and 100ĪSUS TraceFree 0: Ghosting is very visible, especially at the left edge of the UFO dome.ĪSUS TraceFree 20: Ghosting is still visible at the left edge of the UFO dome and base.ĪSUS TraceFree 40: Ghosting almost gone.Preview of NVIDIA G-SYNC, Part #1 (Fluidity).14 - G-SYNC 101: Optimal G-SYNC Settings & Conclusion.13 - G-SYNC 101: Hidden Benefits of High Refresh Rate G-SYNC.12 - G-SYNC 101: External FPS Limiter HOWTO.10 - G-SYNC 101: G-SYNC Fullscreen vs.
03 - G-SYNC 101: Input Lag & Test Methodology.
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