Mura Uniformity Percentage Calculator
Observed luminance uniformity100min/max under actual flat field/homogeneous mask, test nonzero maximum; not RMS mura or model spatial defect visibility.
Description
Display luminance uniformity compares measurements from a matched field.
Display luminance uniformity compares measurements from a matched field.1
A minimum-to-maximum percentage summarizes the range without describing the spatial pattern of mura defects. The calculation and input requirements are explained below.
When to use Mura Uniformity Percentage Calculator
Enter a nonempty list of nonnegative luminance measurements from a matched field.
How to use Mura Uniformity Percentage 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 Mura Uniformity Percentage 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 |
|---|---|---|---|
| actualMatchedFieldLuminanceMeasurements | Actual Matched Field Luminance Measurements. Use the units and matching context stated in the calculation below. | array of number | Required; other constraints below |
Enter a nonempty list of nonnegative luminance measurements from a matched field. Require a positive maximum and return 100 times the minimum divided by the maximum. All-zero measurements fail; a uniform positive field returns 100%.
uniformityPercent=100*min(luminance)/max(luminance) 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": {
"actualMatchedFieldLuminanceMeasurements": [
2,
4
]
},
"output": {
"result": {
"value": 50
}
}
}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 Screen Door Effect Visibility Calculator for a complementary operation: Screen-door visibility concerns the perception of gaps between display pixels.
Use Mura Correction Factor Calculator for a complementary operation: A flat-field correction gain scales an observed pixel response toward a target luminance.
References
-
Mura Uniformity Percentage Calculator — tool.io
Similar or alternative tools
- Screen Door Effect Visibility Calculator
Screen-door visibility concerns the perception of gaps between display pixels.
- Mura Correction Factor Calculator
A flat-field correction gain scales an observed pixel response toward a target luminance.