OLED Data Compensator for Vertical Crosstalk
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Solution Overview
Problem
Organic light-emitting display devices face luminance differences due to vertical crosstalk, which existing technologies have not effectively compensated for, leading to inconsistent image quality and power consumption issues.
Innovation Solution
An organic light-emitting display device and method that utilize a data compensator to generate a reference voltage based on coupling voltages between pixels and data lines, comparing average and reference voltages to create a compensation signal, which adjusts voltage levels to mitigate luminance differences caused by vertical crosstalk.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If data compensator generates reference voltage based on coupling voltages and compares with average voltage to create compensation signal, then luminance uniformity is improved, but device complexity increases
Solution Approach 1:
The data compensator implements a feedback mechanism by generating reference voltages based on coupling voltages between pixels and data lines, comparing these reference voltages with average voltages, and creating compensation signals to correct luminance deviations. This closed-loop feedback system continuously monitors and adjusts for vertical crosstalk effects, improving luminance uniformity across the display.
Solution Approach 2:
The patent introduces an intermediary data compensator component that mediates between the data lines and pixels. This intermediary generates compensation signals based on coupling voltage measurements, acting as a buffer that corrects vertical crosstalk effects before they manifest as luminance inconsistencies in the displayed image.
2Manufacturing precision
If compensation signal adjusts voltage levels to mitigate vertical crosstalk, then image quality is improved, but power consumption increases
Solution Approach 1:
The data compensator dynamically changes voltage parameters by generating compensation signals that adjust voltage levels applied to pixels. By modifying these voltage parameters based on measured coupling voltages and calculated average voltages, the system mitigates vertical crosstalk effects and improves image quality through precise electrical parameter control.
3Reliability
If reference voltage is generated based on multiple coupling voltages, then vertical crosstalk compensation is improved, but manufacturing complexity increases
Solution Approach 1:
The patent segments the voltage compensation process into distinct functional components: generating individual reference voltages for different pixels based on their specific coupling voltages, calculating separate average voltages for different data line groups, and creating targeted compensation signals for each pixel. This segmentation allows for systematic implementation of complex compensation algorithms.
Solution Approach 2:
The system changes multiple electrical parameters simultaneously by generating reference voltages based on varying coupling voltages between different pixels and data lines. By adjusting these voltage parameters dynamically, the patent achieves reliable vertical crosstalk compensation that accounts for manufacturing variations in coupling capacitances.
Data Source
AI summary
A display including first to n-th pixels electrically connected with a first data line, and a data compensator for generating a reference voltage of a k-th pixel (k being between 1 and n) based on a first coupling voltage between the k-th pixel and the first data line and a second coupling voltage between the k-th pixel and a second data line, and comparing an average voltage generated based on a reference voltage of at least one of the first to n-th pixels with the reference voltage of the k-th pixel to generate a compensation signal, wherein the reference voltage of at least one of the first to n-th pixels is based on a coupling voltage between the at least one of the first to n-th pixels and the first data line and based on a coupling voltage between the pixels and the second data line.