Display Panel Initialization Lines for Color-Specific Voltages
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Solution Overview
Problem
The electrical characteristics of sub-pixels emitting different colors in organic light-emitting display apparatuses vary due to differences in their light-emitting layers, leading to reduced image quality when a uniform initialization voltage is applied.
Innovation Solution
A display panel design with separate initialization voltage lines for each sub-pixel color, allowing for distinct initialization voltages to be applied to the electrodes of sub-pixels emitting different colors, thereby compensating for these variations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the same initialization voltage is applied to one electrode of each organic light-emitting diode, then the device structure is simple, but image quality characteristics are lowered
Solution Approach 1:
The patent divides the initialization voltage supply system into separate lines for different sub-pixel types. Specifically, red sub-pixels receive initialization voltage through a first initialization voltage line, while green and blue sub-pixels receive initialization voltage through a second initialization voltage line. This segmentation allows each sub-pixel type to be initialized with voltages optimized for its specific light-emitting layer characteristics, thereby improving image quality without significantly complicating the overall device structure.
Solution Approach 2:
The patent applies different initialization voltages to different sub-pixel locations based on their color type. By recognizing that red, green, and blue sub-pixels have different electrical characteristics due to their distinct light-emitting layers, the invention provides localized initialization conditions tailored to each sub-pixel type's specific requirements, thus enhancing overall display performance and image quality.
2Manufacturing precision
If separate initialization voltage lines are used for each sub-pixel color, then image quality characteristics are enhanced, but device complexity increases
Solution Approach 1:
Instead of providing completely separate initialization voltage lines for each individual sub-pixel, the patent segments the initialization voltage supply into two groups: one line for red sub-pixels and another line for green and blue sub-pixels. This segmented approach achieves the necessary differentiation for image quality enhancement while minimizing the increase in device complexity by sharing the second initialization voltage line between green and blue sub-pixels.
Solution Approach 2:
The patent combines green and blue sub-pixels into a single initialization voltage group, allowing them to share the second initialization voltage line. This merging strategy reduces the total number of initialization voltage lines required compared to providing completely separate lines for each sub-pixel color, thus limiting the increase in device complexity while still maintaining differentiated initialization for improved image quality.
Data Source
AI summary
A display panel is disclosed that includes a substrate, a first initialization voltage line, and a second initialization voltage line. The substrate includes a display area and a peripheral area. The first initialization voltage line is arranged in the display area and includes a first vertical voltage line and a first horizontal voltage line. The second initialization voltage line includes a second vertical voltage line and a second horizontal voltage line overlapping the first horizontal voltage line in a plan view. Each of the plurality of pixels includes a first sub-pixel configured to emit light of a first color, and a second sub-pixel configured to emit light of a second color. The first initialization voltage line is configured to transmit a first initialization voltage to one electrode of a light-emitting diode of the first sub-pixel. The second initialization voltage line is configured to transmit a second initialization voltage to one electrode of a light-emitting diode of the second sub-pixel.


