Fullscreen Black Screen
A fullscreen black surface helps inspect uniformity, bright pixels, IPS glow and backlight bleed in a dim room. OLEDs usually reduce black emission substantially; LCDs still depend on their backlight and local-dimming behavior.
Open tool fullscreen →Interface and local controls remain in Portuguese.
How to use
- Open the tool and request fullscreen using its button or the F key.
- Use your normal brightness and dim the room without creating an uncomfortable condition.
- Inspect center, corners and edges head-on, then shift the viewing angle slightly. Record only repeatable observations.
When to use
- Visual inspection of bright pixels, IPS glow and backlight bleed.
- Checking a new monitor within the applicable return or warranty period.
- Side-by-side comparison under the same brightness, angle and ambient light.
- Reducing light from an idle secondary display.
Limitations
Results depend on panel technology, brightness, local dimming, angle and visual adaptation. The browser does not measure luminance or certify hardware faults.
Frequently Asked Questions
- Does a black screen save power?
- OLEDs and LCDs with local dimming may use less power for black areas, but the change varies by model, brightness and processing. LCDs without local dimming may keep the backlight active.
- How do I distinguish IPS Glow from Backlight Bleed?
- A strong change with viewing angle suggests glow; a repeatable fixed region may suggest bleed. Camera exposure and chassis construction can make the comparison ambiguous.
Technical Methodology & Display Science
OLED panels are self-emissive and can reduce emission from black pixels without a continuous backlight. Physical luminance and remaining power depend on the panel, electronics and device processing; this page does not measure them.
LCDs modulate a backlight. Black level varies with panel type, brightness, contrast, local dimming and viewing conditions, so digital #000000 does not imply one universal physical value.
Angular glow and assembly-related bleed can look similar. Repeating the observation with a controlled position, brightness and room condition helps describe the pattern, while final cause attribution requires manufacturer or technician assessment.