Pixel Driving Circuit Layout for Dense Displays and Stable Brightness
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Solution Overview
Problem
Current pixel driving circuits in display panels face challenges in optimizing voltage signal line configurations, leading to potential misactivation of thin-film transistors and inefficient use of space, which affects pixel density and brightness consistency.
Innovation Solution
The proposed pixel driving circuit incorporates constant and variable voltage signal lines, where the constant voltage lines provide stable direct current and the variable voltage lines offer alternating current, with specific overlap configurations to prevent misactivation and reduce circuit length and area, enhancing pixel density and brightness control.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If signal lines are arranged in conventional configurations, then circuit functionality is maintained, but pixel density is reduced and brightness consistency deteriorates due to larger circuit area and potential misactivation
Solution Approach 1:
The patent applies dimensionality change by transitioning from planar signal line arrangement to three-dimensional overlapping configuration. Constant voltage signal lines and variable voltage signal lines are arranged in different layers that overlap vertically, utilizing the Z-dimension to reduce the footprint area while maintaining electrical functionality and improving pixel density.
Solution Approach 2:
The patent implements nesting by placing constant voltage signal lines and variable voltage signal lines in nested overlapping positions. The signal lines are configured such that one set of lines is positioned above another set in a vertical stacking arrangement, allowing compact integration and reducing overall circuit area.
2Reliability
If signal lines are arranged in conventional configurations, then circuit functionality is maintained, but misactivation of thin-film transistors occurs due to insufficient isolation between signal lines
Solution Approach 1:
The patent uses vertical layering to separate constant voltage signal lines from variable voltage signal lines into different spatial dimensions. This three-dimensional arrangement provides natural electrical isolation and reduces capacitive coupling between signal lines, preventing unintended transistor activation while maintaining compact circuit area.
3Illumination intensity
If signal lines are arranged in conventional configurations, then circuit functionality is maintained, but brightness consistency deteriorates due to inefficient space utilization and potential signal interference
Solution Approach 1:
The patent achieves brightness consistency by utilizing vertical overlapping arrangements to minimize signal line interference and optimize space utilization. The multi-layer configuration reduces parasitic effects and improves signal integrity, leading to more uniform pixel brightness across the display panel.
Data Source
AI summary
Provided are a pixel driving circuit, a display panel, and a display device. Both a constant voltage signal line and a variable voltage signal line extend along a first direction. The constant voltage signal line includes an initialization voltage line, and the variable voltage signal line includes an initialization control signal line. A first electrode of an initialization transistor is electrically connected to the initialization voltage line, a second electrode of the initialization transistor is electrically connected to a first electrode or a second electrode of a drive transistor, and a gate of the initialization transistor is electrically connected to the initialization control signal line and used for turning on the initialization transistor according to a control signal on the initialization control signal line so as to initialize the first electrode or the second electrode of the drive transistor.