LCD

Tech 19 Sep 2026 5 min read

ESP-IDF LCD APIs Depend on the Selected SoC Target

An ESP-IDF project can include esp_lcd_panel_io.h successfully and still fail on esp_lcd_i80_bus_config_t or esp_lcd_new_i80_bus(). That combination looks contradictory until the build target is taken into account. esp_lcd is a framework, not a promise that every ESP chip exposes every LCD transport. The selected SoC determines which low-level interfaces are compiled into the project. Panel-controller support, such as ILI9341, is another layer again. That distinction matters when moving code between ESP32 variants.

ESP-IDF ESP32

Tech 15 Sep 2026 5 min read

Display Overdrive and Inverse Ghosting

A moving object on an LCD can leave a soft trail even when the display is running at a high refresh rate. The panel may be receiving new frames quickly while individual pixels still need time to move from one brightness or color level to another. Many monitors use overdrive to shorten those transitions. The technique can make motion look clearer, but a stronger setting is not automatically better. If the drive is too aggressive for a particular transition, a pixel can pass beyond its intended level before settling. The resulting artifact is commonly called inverse ghosting or overshoot.

Displays Monitors

Tech 11 Sep 2026 9 min read

What Local Dimming Changes on LCD TVs and Monitors

A dark movie scene can expose a basic limitation of an LCD screen. The picture may show a bright lamp against a black night sky, yet the supposedly black parts look grey. On another LCD, the same scene can have much deeper dark areas while the lamp stays bright. One feature that can create this difference is local dimming. Instead of running the entire backlight at one brightness, a local-dimming LCD can reduce the light behind dark parts of the picture while keeping other areas brighter. This can improve contrast, especially in high dynamic range (HDR) video, but the result depends heavily on the backlight design and the system that controls it.

Displays LCD

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