Low Persistence Duty Cycle Calculator

Actual emission duty=persistence_ms×Hz/1000, in[0,1], not global display duty/power forecast.

Description

Low-persistence displays emit light during part of each refresh period.

Low-persistence displays emit light during part of each refresh period.^[1]

Duty cycle is the fraction of that period occupied by emission. The calculation and input requirements are explained below.

When to use Low Persistence Duty Cycle Calculator

Enter nonnegative emission milliseconds per refresh and positive measured refresh Hz.

How to use Low Persistence Duty Cycle Calculator and how it works

Prepare the measurements or independently established model inputs described below, with matching units and observation scope.
Enter the required fields and run Low Persistence Duty Cycle Calculator.
Read the result fields using the formula, output units, signs and ordering explained below.
Correct any rejected inputs and rerun; interpret the result within the stated model and its assumptions.

Input field	Meaning	Value type	Requirement
actualPerRefreshEmissionMilliseconds	Actual Per Refresh Emission Milliseconds. Use the units and matching context stated in the calculation below.	number	Required; nonnegative; finite; other constraints below
actualMeasuredDisplayRefreshHz	Actual Measured Display Refresh Hz. Use the units and matching context stated in the calculation below.	number	Required; strictly positive; finite; other constraints below

Enter nonnegative emission milliseconds per refresh and positive measured refresh Hz. Require their product to be at most 1000, then divide that product by 1000. The output is a duty fraction from 0 to 1, not a percentage.

dutyFraction=emissionMs*refreshHz/1000

Apply the input ordering, units and branch conditions stated above.

Output field	Meaning	Value type
result	Object containing the calculated or selected fields below.	object
result.value	Numeric result under the formula and output units explained above.	number

json

{
  "input": {
    "actualPerRefreshEmissionMilliseconds": 5,
    "actualMeasuredDisplayRefreshHz": 100
  },
  "output": {
    "result": {
      "value": 0.5
    }
  }
}

Limitations and assumptions

The calculation uses the supplied observations and model inputs. It does not collect measurements, select a reference population or coefficient, or establish that the model applies to the actual case. The stated branch conditions and output units remain part of the result.

All fields require explicit values. Unexpected fields, wrong types, nonfinite numbers and sparse arrays are rejected. Alignment, bounds and supported-token rules are explained above; extremely large inputs or nonfinite results can also fail. Input errors differ from successful false comparisons, unavailable-domain flags and empty match lists.

Alternative or Complementary methods

Use Display Refresh Rate Required Calculator for a complementary operation: A refresh budget can limit angular movement between display updates.

Use Display Persistence ms Calculator for a complementary operation: Display persistence is the duration of light emission in a refresh period.

References

Low Persistence Duty Cycle Calculator — tool.io

Similar or alternative tools

Display Refresh Rate Required Calculator
A refresh budget can limit angular movement between display updates.
Display Persistence ms Calculator
Display persistence is the duration of light emission in a refresh period.