How to Run the Contrast Test
- Launch the test above and select the pure black pattern. Dim or turn off room lights — contrast performance is most visible in a controlled environment.
- Observe the black level. How truly black does it look? LCD panels show a dark grey, not true black. OLED pixels turn off completely.
- Cycle to the near-black patterns — can you distinguish very dark shades from pure black? Good contrast means these near-black tones remain distinguishable.
- Run the checkerboard pattern. Alternating black and white squares at the same time reveal ANSI contrast — a better measure of real-world contrast than static measurements.
Dim the room significantly for this test. Ambient light reflecting off the panel surface washes out black levels and distorts your perception of the display's actual contrast.
Contrast Ratio by Panel Type
Contrast ratio is measured as the ratio of the brightest white to the darkest black the panel can produce — a 1000:1 ratio means white is 1,000 times brighter than black.
| Panel Type | Typical Contrast Ratio | Notes |
|---|---|---|
| TN | ~1000:1 | Adequate; limited black depth |
| Standard IPS | 1000–1500:1 | Accurate colour; limited contrast |
| VA | 2500–6000:1 | Best LCD contrast; excellent dark scenes |
| Mini-LED IPS | Up to 1,000,000:1 | Local dimming zones; halo artifacts |
| OLED | ~1,000,000:1 (effective) | Pixels turn off completely; true black |
VA panels have by far the best contrast ratio of any LCD technology — they are the preferred choice for dark room use, movie watching, and games with dark environments. The trade-off is slower pixel response time on dark transitions (ghosting in dark scenes).
OLED's contrast is technically infinite — a pixel that is off emits no light. The measured figure of ~1,000,000:1 is a floor set by measurement instrument limitations, not a panel ceiling.
Mini-LED displays (Apple MacBook Pro, ASUS ProArt PA32UCX) use thousands of individually controlled LED zones to dim the backlight locally behind dark areas of the image. This achieves very high contrast in HDR content but produces visible halos around bright objects on dark backgrounds — visible in the test as a bright bloom around white elements.
What Contrast Affects
Dark scene gaming and video: Contrast ratio directly determines how dark scenes look. A 1000:1 IPS panel in a dark room shows noticeably grey blacks; a 4000:1 VA or OLED shows genuine dark shadows. The difference is most visible in horror games, space environments, and night scenes.
HDR performance: True HDR requires both very bright highlights and very dark shadows simultaneously — a high contrast ratio is a prerequisite. Displays rated HDR400 with only 1000:1 contrast cannot produce convincing HDR.
General use: For bright-room productivity work, contrast ratio matters less — ambient light lifts the apparent black level regardless of the panel's native black. A 1000:1 IPS in a bright office looks similar to a 4000:1 VA. Contrast ratio differences become relevant primarily in dim or dark environments.
Frequently Asked Questions
What is contrast ratio on a monitor?
Contrast ratio is the ratio of the brightest white to the darkest black a display can produce. A 1000:1 ratio means white is 1,000 times brighter than the deepest black the panel can show. Higher contrast means darker blacks, better shadow detail, and more visual depth in dark content.
What's a good contrast ratio?
For general use: 1000:1 (standard IPS) is adequate. For dark-room use, movies, and gaming: 2500:1 or higher (VA) is noticeably better. For professional HDR or dark-room-critical work: OLED or mini-LED with local dimming. There is a visible qualitative difference between 1000:1 and 3000:1+ in a dimmed room.
Why does OLED have better contrast than LCD?
LCD panels require a backlight that illuminates the entire panel — even "black" areas are lit from behind, producing a dark grey rather than true black. OLED pixels emit their own light individually and can turn off completely, producing absolute black. This gives OLED a contrast advantage that no LCD technology can match without local dimming.
How do I improve contrast on my monitor?
Reduce ambient light in the room — this is the single most effective adjustment. Set the monitor's gamma to 2.2 and ensure HDR mode is off (HDR mode often clips near-black tones on LCD panels). For the best inherent contrast, choose VA or OLED for future purchases.