OLED

Tech 15 Sep 2026 5 min read

OLED PWM Dimming Turns Brightness into Timed Pulses

An OLED pixel does not need a backlight. Its organic emitters produce light directly, so panel electronics can regulate luminance at the pixel level. One common control method is pulse-width modulation, or PWM: emission alternates between active and inactive intervals, and the ratio of those intervals sets the average light output seen over time. That temporal pattern matters because a display can refresh an image at one rate while modulating emitted light at another. A 120 Hz refresh specification therefore says little by itself about the frequency or depth of brightness modulation.

OLED Displays

Tech 14 Sep 2026 7 min read

OLED PWM Dimming Controls Brightness With Light Pulses

Lowering a phone’s brightness slider does not always mean its OLED pixels simply emit a weaker, perfectly steady glow. Many OLED displays use pulse-width modulation, or PWM, for at least part of their brightness range. The pixels alternate between brighter and darker states quickly enough that the resulting light is perceived as a lower average level. This behavior is easy to miss during ordinary use because the modulation can happen hundreds or thousands of times per second. A camera with a suitable shutter setting may reveal bands, while measurement equipment can show the changing light output directly.

OLED Displays

Tech 14 Sep 2026 8 min read

OLED Pixel Wear and Static Image Retention

OLED screens can produce deep blacks and strong contrast because each pixel generates its own light. A black pixel can simply remain off instead of relying on a shared backlight. That same self-emissive design also gives each light-producing element a finite operating life. As an OLED panel accumulates use, its subpixels gradually lose some ability to produce the same brightness from the same electrical drive. Normal aging is spread across the panel when content changes frequently. Static logos, status bars, game interfaces, navigation controls, or other fixed graphics can concentrate use in particular areas. If the difference becomes large enough, a faint trace of those shapes can remain visible during unrelated content.

Tech Displays

Tech 03 Sep 2026 9 min read

OLED vs LCD Screens: What the Difference Means in Everyday Use

Phones, laptops, monitors, and televisions can look similar from the outside while using very different technology to produce an image. Two common display types are OLED and LCD. The most useful difference is simple: an OLED pixel can produce its own light, while an LCD pixel controls light coming from a separate backlight. That one distinction explains many of the differences people notice in black levels, contrast, power use, screen thickness, and long-term ageing.

Displays OLED