Display Panel Aperture Ratio Adjustment for Luminance Uniformity
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Solution Overview
Problem
The presence of driving circuits in the display region of a display panel for switching gate lines between selected and non-selected states leads to reduced gate line potentials, making high-speed driving difficult and causing luminance differences and display irregularities due to varying aperture ratios.
Innovation Solution
Incorporating an aperture ratio adjustment member in the non-installation region of the display panel, such as an adjustment line or black matrix, to stepwise adjust the aperture ratio and reduce luminance differences between the installation and non-installation regions, thereby minimizing display irregularities.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If driving circuits are provided in the display region to reduce gate line routing distance, then gate line potential dullness is reduced and high-speed driving is enabled, but aperture ratios become different across pixels causing luminance differences and display irregularities
Solution Approach 1:
The patent applies local quality by providing driving circuits only in specific regions (first and second regions) rather than uniformly across the entire display region. This allows different areas to have different functional characteristics - regions with driving circuits can operate at high speed while other regions maintain uniform aperture ratios, thereby resolving the contradiction between speed improvement and uniformity maintenance.
Solution Approach 2:
The display region is segmented into multiple areas: first regions where driving circuits are provided, second regions where driving circuits are not provided, and a third region that is a transition zone. This segmentation allows the system to achieve high-speed driving in specific areas while maintaining overall aperture ratio uniformity through the transition region that gradually adjusts aperture ratios.
2Area of stationary object
If driving circuits are provided in the display region, then frame width is narrowed on three sides, but pixels with driving circuits have smaller aperture ratios causing luminance differences
Solution Approach 1:
The patent implements local quality by creating distinct regions with different characteristics: first regions contain driving circuits and have reduced aperture ratios, second regions have standard aperture ratios, and the third transition region gradually adjusts aperture ratios between these areas. This localized approach allows frame narrowing while maintaining luminance uniformity through the transition zone.
Solution Approach 2:
The patent applies dynamics by creating a transition region where aperture ratios are gradually adjusted rather than abruptly changed. This dynamic transition allows the display to maintain luminance uniformity across regions with different aperture ratios, preventing visible luminance differences while still achieving frame narrowing.
3Manufacturing precision
If aperture ratio is adjusted in the non-installation region to reduce luminance differences, then display irregularities are reduced, but the structure becomes more complex
Solution Approach 1:
The patent applies local quality by introducing aperture ratio adjustment members (such as black matrices or light-shielding films) specifically in the third region where transition is needed, rather than uniformly across the entire display. This localized adjustment reduces display irregularities while minimizing the overall structural complexity.
Solution Approach 2:
The patent uses aperture ratio adjustment members as intermediary elements in the third region to mediate between regions with different aperture ratios. These intermediaries gradually adjust the aperture ratio to reduce luminance differences, thereby reducing display irregularities without requiring fundamental changes to the overall device structure.
Data Source
AI summary
Provided is a display panel that reduces occurrence of display irregularities in a display region even in a case where driving circuits that switch gate lines between selected and non-selected states are provided in the display region. A display panel of the present invention includes an active matrix substrate and a counter substrate, the active matrix substrate being provided with a plurality of gate lines and a plurality of source lines. The active matrix substrate includes, in a display region, a driving circuit provided with respect to each of the gate lines, for switching the gate line between a selected state and a non-selected state. The display panel further includes, in a non-installation region where the driving circuit is not provided, an aperture ratio adjustment member that changes an aperture ratio in the non-installation region stepwise, in order to decrease a difference between a luminance in an installation region where the driving circuit is provided and a luminance in the non-installation region.