Display Initialization Voltage Mesh with Pixel Openings for Notch Uniformity
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Solution Overview
Problem
Display devices experience luminance deviations due to load differences between wires at the notch portion and other areas, leading to uneven transmission of voltages and resulting in luminance deviations across different areas.
Innovation Solution
The display device incorporates a second initialization voltage line with a mesh structure, including horizontal and vertical portions, to evenly distribute voltage across the display area, minimizing load differences and ensuring uniform luminance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a conventional initialization voltage line structure is used, then the device complexity is low, but luminance uniformity deteriorates due to load differences between wires at the notch portion and other areas
Solution Approach 1:
The initialization voltage line is divided into multiple segments including a first initialization voltage line and a second initialization voltage line with different configurations. The second initialization voltage line includes both horizontal portions (along the row direction) and vertical portions (along the column direction), allowing different areas of the display to receive initialization voltage through optimized paths that balance the load distribution and reduce luminance deviations.
2Manufacturing precision
If the second initialization voltage line includes vertical portions between pixels, then luminance uniformity is improved by evenly transmitting voltage, but the device complexity increases due to the mesh structure
Solution Approach 1:
The second initialization voltage line is configured with vertical portions positioned between pixels in specific columns, creating localized optimization in areas where load differences are most pronounced. This selective placement of vertical portions allows the voltage to be evenly distributed to pixels in affected areas while maintaining a simpler structure in other regions, thus balancing luminance uniformity improvement with device complexity management.
Data Source
AI summary
Provided is a display device which comprises a substrate, a plurality of pixels disposed on the substrate, a first initialization voltage line disposed on the substrate along a first direction, and a second initialization voltage line disposed on a different layer from the first initialization voltage line, wherein the second initialization voltage line may include a horizontal portion disposed along the first direction and a vertical portion disposed along a second direction crossing the first direction, and the vertical portion may be disposed between a plurality of pixels adjacent to each other in the first direction.