Wide-Temperature Brightness Derating Estimator
High ambient temperature costs LED backlight brightness; low temperature slightly raises it but slows the LCD. Enter your rating and operating temperature to see the realistic brightness on-site.
Model: above 25 °C, B = B₀ × (1 − k × ΔT) with k typically 0.4–0.8 %/°C for LED backlights; below 25 °C brightness rises ~0.3 %/°C, capped at +10 %. Verify against the derating curve in the module datasheet.
FAQ
How much brightness does an LCD lose at high temperature?
LED backlights typically lose 0.4 to 0.8 % of their brightness per °C above 25 °C, depending on thermal design. At 70 °C a 1000-nit module may deliver roughly 700–820 nits unless the datasheet states a derating curve.
Is a display brighter or dimmer in the cold?
LEDs are slightly more efficient when cold, so brightness can rise marginally. But the liquid crystal itself responds slower at low temperature, so cold-start legibility is limited by response time rather than brightness.
How do I make sure I still get 1000 nits inside a hot enclosure?
Spec the module with the derating margin included — divide your target by the estimated survival factor, or choose a module with a published high-temperature brightness curve and verify with a sample in your enclosure.
Send your timing, brightness or environment requirements — an application engineer replies within 24 hours with matching in-stock models and a quote.
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