輝 度(きど)

きど

noun

brightness, luminance

1. brightness, luminance

The intensity of light emitted or reflected from a surface, measured per unit area. A technical term used in physics and optics, but also commonly encountered in everyday settings when adjusting screen or display brightness.

画面(がめん)の輝度(きど)を調整(ちょうせい)する。

To adjust the screen brightness.

輝度(きど)が高(たか)すぎて目(め)が疲(つか)れる。

The brightness is too high and it's tiring my eyes.

このモニターは最大(さいだい)輝度(きど)が1000ニトで、屋外(おくがい)でも見(み)やすい。

This monitor has a maximum brightness of 1000 nits, making it easy to see even outdoors.

While technically a physics term (luminance, measured in candela per square meter or nits), 輝度(きど) is commonly encountered in everyday contexts when adjusting screens, monitors, and displays. The more casual term 明(あか)るさ (brightness) is used in general conversation, while 輝度(きど) appears in settings menus and technical specifications.

Common collocations

輝度(きど)を調整(ちょうせい)する: to adjust brightness
輝度(きど)を上(あ)げる/下(さ)げる: to increase/decrease brightness
最大(さいだい)輝度(きど): maximum brightness
高(こう)輝度(きど): high brightness
輝度(きど)設定(せってい): brightness settings

Similar words

明(あか)るさ: brightness — everyday, non-technical word
照度(しょうど): illuminance — measures light falling on a surface (lux), not emitted from it
光度(こうど): luminous intensity — measures total light output of a source in a given direction

general

Added 2026.3.31 4:11 · Revised 2026.9.2 13:02

20500/20878_kido