Display Persistence ms Calculator
Actualperrefreshpositiveemissiondurationms=1000duty/Hz, not liquid crystal response/ghostingtime or eye strain.
Description
Display persistence is the duration of light emission in a refresh period.
Display persistence is the duration of light emission in a refresh period.1
Duty fraction and refresh frequency determine that duration in milliseconds. The calculation and input requirements are explained below.
When to use Display Persistence ms Calculator
Enter an emission duty fraction from 0 to 1 and positive measured refresh Hz.
How to use Display Persistence ms 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 Display Persistence ms 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 |
|---|---|---|---|
| actualPixelEmittingDutyFraction | Actual Pixel Emitting Duty Fraction. Use the units and matching context stated in the calculation below. | number | Required; fraction from 0 to 1; 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 an emission duty fraction from 0 to 1 and positive measured refresh Hz. Multiply duty by 1000 and divide by frequency to return emission milliseconds per refresh. Zero duty returns zero.
persistenceMs=1000*dutyFraction/refreshHz 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 |
{
"input": {
"actualPixelEmittingDutyFraction": 0.5,
"actualMeasuredDisplayRefreshHz": 100
},
"output": {
"result": {
"value": 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 Low Persistence Duty Cycle Calculator for a complementary operation: Low-persistence displays emit light during part of each refresh period.
Use Display Refresh Rate Required Calculator for a complementary operation: A refresh budget can limit angular movement between display updates.
References
-
Display Persistence ms Calculator — tool.io
Similar or alternative tools
- Low Persistence Duty Cycle Calculator
Low-persistence displays emit light during part of each refresh period.
- Display Refresh Rate Required Calculator
A refresh budget can limit angular movement between display updates.