Display Panel Light-Shielding Layout for TFT Active-Layer Protection
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Solution Overview
Problem
The activity of carriers in the active layer of thin-film transistors in display panels is sensitive to light, leading to inaccurate signal provision and reduced light-emitting accuracy, especially in high-resolution displays where light leakage affects the thin-film transistor's performance.
Innovation Solution
A light-shielding structure is integrated between the light-emitting elements and the thin-film transistors, blocking light from reaching the active layer to prevent light-induced interference and ensuring accurate signal delivery.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If no light-shielding structure is used, then the display panel structure is simpler and manufacturing is easier, but light reaches the active layer of the thin-film transistor causing inaccurate signal provision and reduced light-emitting accuracy
Solution Approach 1:
A light-shielding structure is introduced as an intermediary element between the light-emitting element and the thin-film transistor. This mediator blocks light from reaching the active layer of the thin-film transistor, preventing light-induced interference and ensuring accurate signal delivery, thereby resolving the contradiction between maintaining simple structure and achieving high light-emitting accuracy.
Solution Approach 2:
The display panel structure is segmented by adding a dedicated light-shielding component that separates the optical path from the electrical circuit path. This segmentation allows the light-emitting element to operate independently without light interference on the thin-film transistor, improving light-emitting accuracy while keeping the overall design modular and manageable.
2Reliability
If a light-shielding structure is added, then light-emitting accuracy is improved, but the device structure becomes more complex and manufacturing difficulty increases
Solution Approach 1:
The light-shielding structure is merged with existing components or integrated into the encapsulation layer of the display panel. By combining the light-shielding function with structural elements that are already present in the device, the patent improves signal accuracy without proportionally increasing manufacturing complexity, as the light-shielding function is achieved through integration rather than adding entirely separate components.
3Reliability
If the light-shielding structure covers the active layer completely, then light-induced interference is maximally reduced, but the device complexity and material usage increase
Solution Approach 1:
The light-shielding structure is applied selectively and locally only where light interference occurs - specifically between the light-emitting element and the active layer of the thin-film transistor. This localized application provides sufficient light blocking to prevent signal interference while minimizing the quantity of light-shielding material used, avoiding unnecessary material consumption in areas where light shielding is not required.
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 enhances the light-emitting accuracy of display panels by reducing light-induced errors and improving display brightness and contrast by blocking unnecessary light reflections.
Implementation Method 1
a light-shielding structure, where at least part of the light-shielding structure is at least located between a light-emitting element and the thin-film transistor, and the light-shielding structure covers at least an active layer of the thin-film transistor in the direction perpendicular to the plane in which the substrate is located
Data Source
AI summary
Provided are a display panel, a method for preparing a display panel, and a display device. The display panel includes a substrate; multiple driver circuits located on one side of the substrate, where a driver circuit includes a thin-film transistor; multiple light-emitting elements located on the side of the multiple driver circuits facing away from the substrate, where at least one of the multiple light-emitting elements are electrically connected to the multiple driver circuits; and a light-shielding structure, where at least part of light-shielding structure is at least located between a light-emitting element and the thin-film transistor, and the light-shielding structure covers at least an active layer of the thin-film transistor in the direction perpendicular to the plane in which the substrate is located.