Array Substrate Light Converging Structure Aperture Ratio
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Solution Overview
Problem
Existing liquid crystal panels face issues with alignment deviations between array and color filter substrates, leading to light leakage and reduced aperture ratio due to excessive black matrix length or misalignment, causing image sticking.
Innovation Solution
The implementation of a light converging structure on the protective layer over the gate and data lines on the array substrate, which converges stray light to the black matrix region, reducing the black matrix dimensions and increasing the aperture ratio, is achieved by forming convex lens structures using photosensitive resin.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If the black matrix length is increased to prevent light leakage, then light leakage is reduced, but the aperture ratio decreases
Solution Approach 1:
The patent converts the harmful stray light that causes light leakage into a beneficial element by using light converging structures (lens arrays) to redirect the stray light toward the black matrix regions. This allows the black matrix to serve dual purposes: its original function of blocking direct light and the additional function of capturing redirected stray light, thereby preventing light leakage without increasing the black matrix area and maintaining the aperture ratio.
Solution Approach 2:
The patent introduces light converging structures (lens arrays) as intermediary elements between the stray light sources and the black matrix. These lens structures act as mediators that redirect stray light paths toward the black matrix regions, enabling the black matrix to capture stray light without requiring an increase in its dimensions, thus resolving the contradiction between light leakage prevention and aperture ratio maintenance.
2Object-affected harmful factors
If alignment precision between substrates is improved to prevent light leakage, then light leakage is reduced, but manufacturing complexity increases
Solution Approach 1:
The patent implements a self-aligning mechanism where the light converging structures are positioned to automatically redirect stray light toward the black matrix regions based on the existing alignment between substrates. Even with normal alignment tolerances, the optical design ensures that stray light is redirected to appropriate black matrix areas, making the system self-correcting and reducing the need for high-precision alignment while preventing light leakage.
Solution Approach 2:
The light converging structures serve as intermediary optical elements that compensate for alignment deviations between substrates. By redirecting stray light paths, these structures provide a buffer against misalignment, allowing the display to maintain low light leakage even with normal alignment tolerances, thereby reducing manufacturing complexity.
3Area of stationary object
If the black matrix dimensions are reduced to increase aperture ratio, then aperture ratio increases, but light leakage increases
Solution Approach 1:
The patent converts the potential harm of reduced black matrix dimensions (which would normally lead to increased light leakage) into a benefit by using light converging structures to redirect stray light toward the black matrix regions. This allows the black matrix to be smaller while still effectively capturing stray light, thus increasing the aperture ratio without sacrificing light leakage prevention.
Solution Approach 2:
The light converging structures act as intermediary elements that extend the effective light-blocking capability of the reduced black matrix. By redirecting stray light paths toward the black matrix, these structures compensate for the reduced dimensions, enabling the smaller black matrix to maintain its light-blocking function while allowing for a higher aperture ratio.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This solution effectively prevents light leakage, minimizes the black matrix size, and enhances the aperture ratio, thereby improving the brightness and reducing image sticking in liquid crystal displays.
Implementation Method 1
a light converging structure is disposed on the protective layer over the gate line and/or the data line
Implementation Method 2
forming convex lens structures using photosensitive resin
Data Source
AI summary
An array substrate, a display panel and a preparing method thereof are disclosed. The array substrate comprises: a substrate, a gate line and a data line disposed on the substrate, a protective layer covering the gate line and/or data line; a light converging structure is disposed on the protective layer over the gate line and/or the data line.