Display Control Line Layout for Uniform Luminance
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Display devices with varying active region shapes experience luminance deviations due to differing line lengths, leading to image quality degradation.
Innovation Solution
A display device structure incorporating a substrate with multiple display regions of varying widths, peripheral regions, and a dummy region with conductive bridges and lines to compensate for load value differences between control lines, ensuring uniform image quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If display regions have different widths leading to different control line lengths, then device adaptability to various shapes is improved, but luminance uniformity deteriorates due to load value differences
Solution Approach 1:
The patent introduces dummy lines with different capacitances in different display regions to locally compensate for load value differences. Specifically, a first dummy line with a first capacitance is provided in a first display region, and a second dummy line with a second capacitance is provided in a second display region, where the capacitance values are specifically designed to match the different line lengths and load characteristics of each region, thereby achieving local optimization of luminance uniformity while maintaining shape adaptability
Solution Approach 2:
The patent extends the compensation approach from a single-dimensional uniform dummy line structure to a multi-dimensional differentiated structure. By providing dummy lines with different capacitance values across different display regions (spatial dimension), the solution addresses the luminance uniformity issue without compromising the device's ability to adapt to various shapes
2Illumination intensity
If dummy lines with different capacitances are provided in different display regions, then luminance uniformity is improved, but device complexity increases
Solution Approach 1:
The dummy lines serve multiple functions: they compensate for load value differences due to varying line lengths, maintain luminance uniformity across different display regions, and integrate seamlessly with the existing pixel and control line structure. This multi-functionality reduces the need for additional separate compensation mechanisms, thereby limiting the increase in device complexity
Solution Approach 2:
The patent varies the capacitance parameter of the dummy lines according to the specific requirements of each display region. By adjusting the capacitance values (first capacitance for first display region, second capacitance for second display region) to match the local load characteristics, the solution achieves effective compensation without requiring complex structural modifications beyond parameter differentiation
3Adaptability or versatility
If control lines have different lengths in different regions, then shape versatility is improved, but manufacturing precision requirements increase to maintain image quality
Solution Approach 1:
The dummy lines are designed and configured in advance during the manufacturing process to provide pre-calculated capacitance compensation. The first dummy line with first capacitance and second dummy line with second capacitance are specifically designed beforehand to compensate for the expected load value differences, reducing the need for post-manufacturing adjustments and simplifying quality control
Data Source
AI summary
A display device including a substrate including a first display region having a first width, a second display region having a second width smaller than the first width, a peripheral region at a periphery of the first and second display regions, and a dummy region in the peripheral region, a first pixel in the first display region, a second pixel in the second display region, a first control line connected to the first pixel and extending in the first display region, a second control line connected to the second pixel and extending in the second display region, and a dummy line connected to the second control line in the dummy region, wherein the second control line is at a first conductive layer on a first insulating layer, the dummy line is at a second conductive layer on a second insulating layer on the first conductive layer.