Viewing Angle Test
Test your display at different viewing angles to evaluate IPS glow, contrast shift, and color accuracy off-axis.
How to test
- Go fullscreen and view from different angles - left, right, above, below.
- IPS glow: Warm glow from corners at wide angles. Normal for IPS panels.
- TN shift: Colors invert or wash out from above/below. Indicates TN panel.
- VA shift: Colors slightly shift but contrast remains high. Indicates VA panel.
Testing guide
How to test viewing angles
Panel technology determines how much the image shifts when you move off-center. This test shows the color and contrast changes that distinguish IPS, VA, and TN panels, and reveals IPS glow, which is often mistaken for a defect.
Best for
- Identifying which panel technology a display actually uses.
- Telling IPS glow apart from genuine backlight bleed before requesting a warranty replacement.
- Checking whether a screen stays usable when shared between two people sitting side by side.
How to run the test
- 1View the test pattern straight on first and note the color and black level as your baseline.
- 2Move roughly 45 degrees to one side and compare how much the brightness and color shift.
- 3Repeat vertically, from above and below, since vertical shift is usually worse than horizontal.
- 4View a dark pattern from an angle in a dim room to check specifically for IPS glow in the corners.
How to read the result
Dramatic color inversion with a small tilt indicates a TN panel.
Blacks that wash out to gray and contrast that drops off-axis indicates a VA panel.
A silvery sheen appearing in the corners at an angle, which moves as you move, is IPS glow and is inherent to the technology rather than a fault.
Related tools and guides
Frequently asked questions
What is IPS glow and is it a defect?
IPS glow is a silvery or bluish sheen that appears in the corners of an IPS panel when viewed at an angle in a dark room. It shifts position as you move your head. It is an inherent characteristic of IPS technology, not a manufacturing defect, and it cannot be repaired.
How do I tell IPS glow from backlight bleed?
Move your head. IPS glow changes position and intensity as your viewing angle changes, and disappears when viewed straight on. Backlight bleed stays fixed in the same spot regardless of where you sit, because it is light physically leaking around the panel edge.
Which panel type has the best viewing angles?
IPS is the strongest, holding color and contrast well up to around 178 degrees. VA is reasonable horizontally but loses black depth off-axis. TN is the weakest by a wide margin, shifting color noticeably with even small movements.
Do viewing angles matter for a single-user desk setup?
More than people expect. On a large or curved monitor, the edges of the panel are already at a meaningful angle from your eyes even when you sit centered, so a weak panel shows visible color shift from one side of the screen to the other.
Why does my monitor look washed out from the side?
That is characteristic VA behavior: blacks lift toward gray and contrast collapses off-axis. It is normal for the technology and is the main trade-off against the very high straight-on contrast that VA panels deliver.
Testing guide
How to test viewing angles
Panel technology determines how much the image shifts when you move off-center. This test shows the color and contrast changes that distinguish IPS, VA, and TN panels, and reveals IPS glow, which is often mistaken for a defect.
Best for
- Identifying which panel technology a display actually uses.
- Telling IPS glow apart from genuine backlight bleed before requesting a warranty replacement.
- Checking whether a screen stays usable when shared between two people sitting side by side.
How to run the test
- 1View the test pattern straight on first and note the color and black level as your baseline.
- 2Move roughly 45 degrees to one side and compare how much the brightness and color shift.
- 3Repeat vertically, from above and below, since vertical shift is usually worse than horizontal.
- 4View a dark pattern from an angle in a dim room to check specifically for IPS glow in the corners.
How to read the result
Dramatic color inversion with a small tilt indicates a TN panel.
Blacks that wash out to gray and contrast that drops off-axis indicates a VA panel.
A silvery sheen appearing in the corners at an angle, which moves as you move, is IPS glow and is inherent to the technology rather than a fault.
Related tools and guides
Frequently asked questions
What is IPS glow and is it a defect?
IPS glow is a silvery or bluish sheen that appears in the corners of an IPS panel when viewed at an angle in a dark room. It shifts position as you move your head. It is an inherent characteristic of IPS technology, not a manufacturing defect, and it cannot be repaired.
How do I tell IPS glow from backlight bleed?
Move your head. IPS glow changes position and intensity as your viewing angle changes, and disappears when viewed straight on. Backlight bleed stays fixed in the same spot regardless of where you sit, because it is light physically leaking around the panel edge.
Which panel type has the best viewing angles?
IPS is the strongest, holding color and contrast well up to around 178 degrees. VA is reasonable horizontally but loses black depth off-axis. TN is the weakest by a wide margin, shifting color noticeably with even small movements.
Do viewing angles matter for a single-user desk setup?
More than people expect. On a large or curved monitor, the edges of the panel are already at a meaningful angle from your eyes even when you sit centered, so a weak panel shows visible color shift from one side of the screen to the other.
Why does my monitor look washed out from the side?
That is characteristic VA behavior: blacks lift toward gray and contrast collapses off-axis. It is normal for the technology and is the main trade-off against the very high straight-on contrast that VA panels deliver.