Viewing Angle Test

Document visible color, brightness, and contrast changes from centered and off-axis viewing positions.

Go to test controls

This check runs directly on this page without requiring fullscreen. Review what this browser test can and cannot measure.

Before you start

  • Use steady room lighting and keep display settings fixed.
  • Compare the same pattern from center, one off-axis position, then center again. Record only the directions and positions you actually checked.
Step-by-step instructions

How to run this check

  1. Start the Viewing Angle Test
  2. Choose a test pattern
  3. Compare the same pattern from center, an off-axis position, then center again
  4. Keep display settings, room lighting, and viewing distance unchanged
  5. Record the positions actually compared and separate color and contrast observations; leave untested directions not assessed

Compare one pattern from your normal centered seat, then an off-axis position, then the center again. Keep the display and picture settings fixed. Press ESC to exit.

Repeatable off-axis observations

Observation Repeatable recheck Boundary
Color shift Return to center, then repeat from the same left and right positions. No Delta E or gamut measurement
Brightness change Keep distance fixed and compare the same above and below positions. No luminance percentage
Dark-tone change Use the same dark pattern and return to the centered reference between directions. No gamma value or panel identification

Use product documentation—not the appearance of these patterns—when panel technology matters.

What this browser test can tell you

Can help you check

  • Visible color and contrast changes from different positions.

Cannot measure

  • This test cannot identify the panel technology.

Interpret this observation

  • Record the positions actually compared and color and contrast changes separately. A center-only check or an unassessed direction cannot establish off-axis behavior.
  • Exact angular color and luminance measurements require a goniometric measurement system and calibrated meter.
Setup and sources

Recommended setup

  1. Start centered at your normal viewing distance with steady room lighting.
  2. Compare one off-axis position, then return to center on the same pattern; keep the screen and picture settings unchanged.

Methodology reviewed: