Noise measuring device and noise measuring method using the same
US12039904B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 20, 2022 |
| Grant date | Jul 16, 2024 |
| Priority date | — |
| Expiry date | Jun 20, 2042 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG09G2360/145
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A noise measurement device for measuring noise of a test image displayed on a display device including a display panel and an input sensor configured to sense an external input, includes a luminance meter, a converter, and a determiner. The luminance meter is configured to: measure a luminance of the test image in a state in which the input sensor is turned on to generate first luminance measurement values; and measure a luminance of the test image in a state in which the input sensor is turned off to generate second luminance measurement values. The converter is configured to apply a contrast sensitivity function to luminance difference values between the first and second luminance measurement values to generate final conversion values. The determiner is configured to compare the final conversion values with a predetermined reference range to determine whether a defect exists in the test image.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.