Display Panel Operational Amplifier Segmentation for Stripe Elimination
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Solution Overview
Problem
Conventional display panels with RGB subpixel arrangements experience bright and dark horizontal stripes when displaying solid colors due to uneven grayscale value transitions, affecting the display effect.
Innovation Solution
A display panel design with operational amplifiers connected via switching devices to output data signals to subpixels of the same color successively, ensuring that subpixels of the same color receive identical charging amounts, eliminating grayscale jumps and stripe issues.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the same data line is connected to subpixels of three different colors (R, G, B) and a single operational amplifier outputs data signals successively, then the device complexity is reduced, but bright and dark horizontal stripes appear due to grayscale value jumping
Solution Approach 1:
The patent divides the data signal output function by color channel, with each operational amplifier dedicated to a specific color (R, G, or B). This segmentation ensures that grayscale values for the same color transition smoothly without jumping between different colors, thereby eliminating the bright and dark horizontal stripes while maintaining manageable device complexity through organized signal routing
Solution Approach 2:
The patent introduces a control unit as an intermediary that manages the switching between different operational amplifiers based on the current scanning row's color configuration. This control unit receives the row type signal and selectively activates the appropriate operational amplifier, ensuring that the correct color channel's grayscale values are output without interruption or jumping, thus preventing stripe artifacts
2Productivity
If grayscale values jump between different colors (e.g., from 0 to 127 or from 255 to 127), then the charging amount varies significantly, but this causes uneven brightness and horizontal stripes
Solution Approach 1:
By segmenting the operational amplifiers according to color channels and dedicating each to a specific color, the patent ensures that grayscale transitions occur within the same color channel rather than jumping between colors. This maintains consistent charging amounts for successive pixels of the same color, ensuring uniform brightness across the display while preserving fast refresh capabilities
Solution Approach 2:
The control unit monitors the current row type signal and dynamically selects which operational amplifier should be active, creating a feedback mechanism that adapts to the Rainbow arrangement pattern. This ensures that the correct grayscale values are always output for the current color being scanned, preventing brightness variations and horizontal stripes while maintaining efficient display refresh
Data Source
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AI summary
The present disclosure provides a display panel, a driving method and a display apparatus. Since the data signals are outputted by different operational amplifiers to the subpixels of different colors connected to the same data line, and the data signals are outputted by the same operational amplifier to the subpixels of the same color on the same data line, when the above display panel displays one frame of picture of solid color, even if the subpixels of different colors correspond to different grayscale values, since the subpixels of the same color connected to the same data line correspond to the same operational amplifier, that is, the data signals of the subpixels of the same color which have the same grayscale value are always outputted by the same operational amplifier, grayscale jump would not take place. Consequently, the charging amounts for the subpixels of the same color are identical and the brightnesses thereof are also the same upon display, thereby eliminating the bright and dark horizontal stripes presented on the display panel when displaying a picture of solid color and improving the display effect of the display panel.