AMOLED Crosstalk Compensation via Voltage Variation
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Solution Overview
Problem
Active Matrix OLED (AMOLED) display devices experience image crosstalk due to signal coupling, which affects display brightness and is not effectively compensated by existing technologies.
Innovation Solution
A method and device that calculate and apply a compensated data voltage to pixel units by determining a power-voltage variation value based on data-voltage variations, using coupling parameters and weight values of adjacent pixel units to alleviate crosstalk, thereby setting a corrected data voltage to be applied at the next scanning time instant.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If data voltage is applied to pixel units in AMOLED display, then display brightness is achieved, but image crosstalk occurs due to signal coupling between adjacent pixel units
Solution Approach 1:
The patent applies preliminary action by calculating and compensating for the data voltage before it is applied to the pixel unit. The compensation value is determined based on the data voltage variation of the current pixel unit and its adjacent pixel units, and this pre-calculated compensation is then applied to eliminate the crosstalk effect before display occurs.
Solution Approach 2:
The patent implements feedback by using the data voltage variation information of adjacent pixel units to adjust the data voltage of the current pixel unit. The coupling parameter represents the influence of adjacent pixels, and this feedback mechanism allows the system to compensate for crosstalk by incorporating information from neighboring pixel units into the voltage calculation.
2Object-affected harmful factors
If existing compensation methods are applied, then some crosstalk reduction is achieved, but display brightness is not effectively improved
Solution Approach 1:
The patent applies parameter changes by modifying the data voltage parameter based on the coupling parameter and data voltage variation. The compensation value is calculated as the product of the coupling parameter and the data voltage variation, and this adjusted parameter is then applied to achieve both crosstalk reduction and brightness improvement.
3Measurement precision
If coupling between adjacent pixel units is considered, then crosstalk compensation accuracy is improved, but calculation complexity increases
Solution Approach 1:
The patent applies local quality by focusing the compensation calculation only on adjacent pixel units that have significant coupling influence. The coupling parameter selectively weights the contribution of each adjacent pixel unit, allowing accurate compensation to be achieved by considering only the most relevant local interactions rather than all possible pixel interactions.
Data Source
AI summary
A method and a device for compensating for image crosstalk and a display apparatus are provided. The method includes: obtaining (S101) a data-voltage variation value between a data voltage applied to a pixel unit at a current scanning time instant and a data voltage applied to the pixel unit at a previous scanning time instant; determining a power-voltage variation value based on the data-voltage variation value (S102); setting a sum of the power-voltage variation value and an original data voltage to be applied to the pixel unit at a next time instant as a compensated data voltage of the pixel unit (S103); and setting the compensated data voltage of the pixel unit as an actual data voltage to be applied to the pixel unit at the next time instant (S104).