Display Device Sub-pixel Crosstalk Compensation via Zero Potential Sum
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Solution Overview
Problem
Display devices with sub-pixels arranged in a specific color array configuration suffer from deterioration in display quality due to crosstalk, where regions adjacent to a single-colored window image become brightened or darkened depending on the driving order of pixels.
Innovation Solution
A display device configuration where sub-pixels are periodically arranged in one direction and regularly in another, with signal lines and scan lines selected by selector signals to ensure that the sum of potential changes across signal lines is zero when sub-pixel rows are sequentially selected, preventing crosstalk.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If sub-pixels are arranged in a specific color array configuration and driven independently, then display resolution and color control are improved, but crosstalk occurs causing deterioration in display quality
Solution Approach 1:
The patent applies preliminary anti-action by introducing a compensation signal that has the opposite polarity to the crosstalk signal. Before the crosstalk can deteriorate the display quality, the compensation signal is applied to the signal line to counteract the harmful effect. The compensation signal is generated based on the detection of crosstalk and is designed to have equal magnitude but opposite polarity, thereby preventing the net effect of crosstalk on adjacent sub-pixels.
2Object-generated harmful factors
If selector signals select pairs of signal lines with reverse polarity, then crosstalk compensation is achieved, but device complexity increases
Solution Approach 1:
The patent applies segmentation by dividing the signal line control into multiple independent pairs, where each pair consists of two signal lines with reverse polarity. This segmentation allows the control circuit to manage crosstalk compensation in a modular fashion, selecting specific pairs of signal lines based on the detected crosstalk pattern. By segmenting the control into discrete pairs, the complexity is managed through systematic organization rather than holistic complexity.
Solution Approach 2:
The patent implements periodic action through the sequential selection of sub-pixel rows by scan lines. During each period when a sub-pixel row is selected, the selector signals systematically choose pairs of signal lines with reverse polarity to apply compensation. This periodic selection process repeats for each row, creating a rhythmic and predictable control pattern that simplifies the overall system operation despite the increased complexity of individual control steps.
Data Source
AI summary
According to an aspect, a display device includes an image display panel including: sub-pixel rows, in each of which sub-pixels for displaying different colors are periodically arrayed in a first direction, are regularly arranged in a second direction different from the first direction; signal lines in parallel to sub-pixel columns in which the sub-pixels are successively arranged in the second direction; and scan lines that sequentially select each sub-pixel row. Each of m (integer ≥2) selector signals selects n (integer ≥1) pairs of the signal lines each supplied with two signals each having a mutually reverse polarity, within a period during which each sub-pixel row is selected by a corresponding scan line, and a sum of potential changes of the n pairs of the signal lines selected by each selector signal is substantially zero when each sub-pixel row is sequentially selected by the corresponding scan line.