Display Sub-Pixel Crosstalk Compensation via Gray Level Voltage Adjustment
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Solution Overview
Problem
Current display panels experience significant color crosstalk due to capacitance coupling between sub-pixels, particularly under N-line inversion driving mode, leading to poor display quality as the brightness and chroma of blended colors do not accurately represent white, exceeding acceptable customer specifications.
Innovation Solution
A compensation method that adjusts the gray level voltage of one sub-pixel based on the gray level of an adjacent sub-pixel using a look-up table to configure a compensation range, selecting or maintaining correction gray levels to reduce or eliminate crosstalk, thereby enhancing display quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If the spacing between adjacent pixels is reduced or electrodes are overlapped to increase aperture ratio, then transmittance and power consumption characteristics are improved, but capacitance coupling increases causing color crosstalk
Solution Approach 1:
The patent changes the driving mode parameter from conventional inversion methods to N-line inversion, and introduces gray level compensation parameters to adjust the voltage applied to sub-pixels. By modifying these parameters, the patent reduces capacitance coupling effects while maintaining the high aperture ratio design, thereby reducing color crosstalk without sacrificing power consumption characteristics.
Solution Approach 2:
The patent implements a feedback mechanism through gray level compensation. The display device measures or calculates the actual gray level output and compares it with the intended gray level, then adjusts the driving voltages accordingly. This feedback loop compensates for the color crosstalk caused by capacitance coupling, ensuring accurate color display while maintaining the benefits of reduced pixel spacing.
2Use of energy by moving object
If N-line inversion driving mode is used to display monochromatic image, then power consumption is reduced, but large potential difference arises between neighboring sub-pixels causing severe color crosstalk
Solution Approach 1:
The patent modifies the driving parameters by implementing gray level compensation specifically tailored for N-line inversion mode. Different compensation values are applied depending on the gray level being displayed and the position of sub-pixels within the N-line inversion pattern. This parameter adjustment reduces the potential difference between neighboring sub-pixels while maintaining the power-saving benefits of N-line inversion.
Solution Approach 2:
The patent applies localized compensation to different sub-pixels based on their specific positions and the local capacitance coupling conditions. Each sub-pixel receives customized gray level compensation values according to its neighboring sub-pixels' states, ensuring that the potential differences are minimized locally while maintaining overall power efficiency in N-line inversion mode.
3Object-affected harmful factors
If polymer film is added to reduce coupling effect, then crosstalk is reduced, but device complexity and manufacturing process are increased
Solution Approach 1:
The patent replaces the mechanical/physical solution of adding polymer film with an electrical/control-based solution. Instead of modifying the physical structure to reduce capacitance coupling, the patent uses gray level compensation through voltage adjustment to counteract the coupling effects. This substitution maintains the simple display panel structure while achieving crosstalk reduction through intelligent driving control.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Effectively reduces or eliminates crosstalk between sub-pixels, minimizing potential differences and brightness discrepancies, thereby improving the overall display quality by synchronously adjusting the gray level voltage of adjacent sub-pixels.
Implementation Method 1
the exiting methods described in practice would increase the capacitance coupling and generating crosstalk effecting display quality
Data Source
AI summary
The present disclosure provides a crosstalk compensation method and a display apparatus using the same. The method includes: configuring a compensation range with the compensation range set between the maximum gray level and the minimum gray level; establishing a look-up table to record compensation values for each gray level in the compensation range; determining whether the gray level of a first color sub-pixel on the display panel is set within the compensating range. When it is determined that the gray level of the first color sub-pixel is set within the compensation range selects a compensating value for configuring an initial gray level of an adjacent second color sub-pixel to a correction gray level. When it is determined that the gray level of the first color sub-pixel is set outside the compensation range, maintains the gray level of the second color sub-pixel at the initial gray level.