display.tools

Why to use white screen?

By examining a full white screen, you can identify these defects more easily because any inconsistencies or abnormalities in the display will stand out against the uniform white background. Keep in mind that not all monitors will exhibit all of these issues, and the severity of the defects can vary.

Analyzing a full white screen on a monitor can help reveal various display-related issues and defects that might be present in the screen. A white screen is particularly useful for detecting defects because it allows you to assess uniformity, color accuracy, and the presence of certain imperfections.

What is image retention and burn-in?

Image retention and burn-in are related display issues that can affect certain types of screens, particularly those that use technologies like OLED or plasma. These issues involve the persistence of static images or patterns on the screen even after the content has changed. However, they differ in terms of their permanence and severity:

Image retention, also known as "image persistence," refers to a temporary phenomenon where a faint ghost image of previously displayed content remains visible on the screen for a short period of time. This effect is more common in older technologies like plasma displays but can also occur in OLED displays under certain conditions. Image retention is usually temporary and tends to disappear gradually as the screen displays new content or is turned off for a while.
Image retention is generally less severe and less persistent than burn-in. It can be caused by prolonged display of static content, such as logos, icons, or on-screen elements, without sufficient variation. Modern OLED displays and some other technologies incorporate measures to reduce the likelihood of image retention, such as pixel-shifting and screen dimming techniques.

Burn-in is a more serious and permanent issue compared to image retention. It occurs when static images or patterns are displayed on the screen for extended periods, causing certain pixels to degrade or age unevenly. As a result, these pixels retain the image even when new content is displayed, leading to visible and persistent ghosting of the burned-in image.
Burn-in is more commonly associated with OLED displays, where organic compounds emit light directly, and prolonged exposure to static elements can cause certain pixels to degrade faster than others. For example, if a static logo is displayed on an OLED screen for long periods, the pixels responsible for displaying the logo might age differently, leading to a visible outline of the logo even when different content is shown.

What is monitor blacklight bleeding?

Monitor backlight bleeding is a visual imperfection that occurs in LCD (liquid crystal display) monitors, where light from the monitor's backlight source escapes through the edges or corners of the screen, leading to uneven and unintended patches of brightness on the display. This phenomenon is most noticeable when displaying dark content or scenes, as the leaked light can cause certain areas of the screen to appear brighter than intended. Backlight bleeding is a result of the construction and properties of LCD panels, and it can vary in severity based on factors like panel quality, manufacturing processes, and external factors.

What is dead pixel / hot pixel / stuck pixel?

A dead pixel on a monitor refers to a single pixel on the screen that remains unresponsive and does not display any color or light. It appears as a tiny, black dot on the display, surrounded by properly functioning pixels. Dead pixels are a common issue in LCD (liquid crystal display) screens, including computer monitors, TVs, and other electronic devices that use similar display technology.

Dead pixels can occur due to manufacturing defects or other factors during the production process of the LCD panel. There are different types of dead pixels, including:

Hot pixel is a pixel that is always lit with a bright color, typically white, regardless of the displayed content.
Stuck pixel is a pixel that remains a specific color (often red, green, or blue) and does not change with the rest of the display's content.
Dead pixel is a pixel that remains completely black and does not emit any light, resulting in a small black dot on the screen.

There are some techniques that users attempt to use to revive stuck or dead pixels, such as gently massaging the pixel or using software tools that cycle through colors rapidly to try to stimulate the pixel back to normal functioning. However, these methods are not always effective and might not work for all types of dead pixels. If a dead pixel is bothering you and your monitor is under warranty, you might want to consider contacting the manufacturer for a possible replacement or repair.