Display Substrate Dummy Pixel Load Compensation
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
In full-screen display designs, the presence of openings for hardware modules like cameras leads to uneven pixel loading, affecting charging times and display quality due to differences in load between rows of pixels.
Innovation Solution
A display substrate with a display pixel region, a dummy pixel region, and openings, featuring sub-pixels, dummy sub-pixels with compensation capacitors, and scan signal lines that ensure consistent load on scan signal lines by connecting dummy sub-pixels to pixel driving circuits.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If openings are formed in the display screen for hardware modules, then full-screen design is achieved, but uneven pixel loading occurs affecting charging time and display effect
Solution Approach 1:
The patent creates dummy pixel structures that replicate the electrical characteristics of real pixels without light-emitting components. These copied pixel structures are placed in regions corresponding to opening locations, providing equivalent electrical loading effects to maintain uniform scan signal line charging times while allowing the actual openings to accommodate hardware modules for full-screen design.
Solution Approach 2:
The patent modifies the electrical parameters of scan signal lines by introducing dummy pixel structures with specific capacitance values. The dummy pixels are designed with capacitance parameters matching real pixels, thereby changing the overall electrical characteristics of the scan signal line to achieve uniform charging time across all scan lines despite the presence of openings that would otherwise create load imbalances.
2Reliability
If dummy pixel structures are added to compensate for uneven loading, then display quality is improved, but device complexity increases
Solution Approach 1:
The dummy pixel structures serve multiple functions simultaneously: they provide electrical loading compensation to balance scan signal line charging times, occupy space to maintain pixel array geometry, and replicate the electrical characteristics of real pixels. This multi-functionality allows a single structure to address multiple requirements without proportionally increasing overall device complexity.
Solution Approach 2:
Instead of creating entirely new complex structures, the patent uses simplified copies of real pixel structures that retain only the essential electrical characteristics (capacitance, connection topology) needed for loading compensation. This copying approach achieves the required display quality improvement while keeping the added structural complexity minimal compared to designing entirely new compensation mechanisms.
Data Source
AI summary
A display substrate, a display panel, and a display device are provided. The display substrate includes: a base substrate; a plurality of sub-pixels in the display pixel region, wherein each sub-pixel includes a pixel driving circuit; a plurality of first dummy sub-pixel structures on the base substrate and in the first dummy pixel region, wherein at least one first dummy sub-pixel structure includes a compensation capacitor; and a plurality of scan signal lines arranged on the base substrate and configured to transmit a scan signal to the pixel driving circuit. At least one scan signal line extends through the display pixel region and the first dummy pixel region, and the at least one scan signal line is electrically connected to the pixel driving circuit of each sub-pixel in a row of sub-pixels and is further electrically connected to the compensation capacitor of the at least one first dummy sub-pixel structure.