Backlight Power & Thermal Estimator
Estimate the LED power and drive current behind a target brightness — before your power budget and enclosure are frozen.
Results are engineering estimates for early sizing — always confirm against the module datasheet before design freeze.
Model: P ≈ 0.15 W per dm² per 100 nits, calibrated against typical industrial TFT backlights (7″ 1000-nit ≈ 2 W, 10.1″ ≈ 4–5 W). Actual draw depends on LED efficacy, dimming method and thermal design — request the module datasheet for the exact LED spec.
FAQ
How reliable is this backlight power estimate?
It is an early-sizing estimate within about plus or minus 25 percent, based on a typical industrial TFT backlight model of 0.15 W per dm squared per 100 nits. Always confirm the exact LED current against the module datasheet before design freeze.
Should I add the touch controller and MCU to this budget?
This tool covers the display subsystem only (backlight, TFT and touch sensor). Add your host MCU, external memory and peripherals separately — a typical Cortex-M with SDRAM adds 50 to 200 mW.
When should I use the backlight power estimator?
Use it before your power budget and enclosure are frozen: when you need to know roughly how much current a target-brightness backlight will draw, so you can size the supply, battery or thermal path early instead of discovering it too late.
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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