Array Substrate TFT Layout With Acute Corners for Lower Resistance
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional thin film transistors experience increased resistance at corners due to charge accumulation, leading to higher heat generation and a higher risk of burning.
Innovation Solution
The array substrate design includes an active layer with first, second, and third active parts, where the angles between the side walls of the sub-active parts and their respective bottom surfaces are acute, reducing corner angles and optimizing current distribution.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the active layer is orthogonal to the first electrode (90° angle), then the structure is simple and easy to manufacture, but charge accumulation occurs at the corners resulting in larger resistance and higher heat generation
Solution Approach 1:
The patent changes the symmetric orthogonal structure (90° angles) to an asymmetric structure where the active layer forms acute angles (α1 and α2 both less than 90°) with the first electrode. This asymmetric design prevents charge accumulation at corners by eliminating the sharp 90° corners, thereby reducing resistance and heat generation while maintaining manufacturing feasibility
Solution Approach 2:
The patent modifies the angular parameter from 90° (orthogonal) to acute angles (α1 < 90° and α2 < 90°). By changing this critical geometric parameter, the patent eliminates corner charge accumulation without fundamentally altering the manufacturing process, thus resolving the contradiction between structural simplicity and reliability
2Ease of manufacture
If the active layer is orthogonal to the second electrode (90° angle), then the structure is simple and easy to manufacture, but charge accumulation occurs at the corners resulting in larger resistance and higher heat generation
Solution Approach 1:
The patent applies asymmetric design to the interface between the active layer and the second electrode, changing the 90° orthogonal angle to an acute angle (α2 < 90°). This eliminates the sharp corner that causes charge accumulation, reducing resistance and improving reliability while keeping the structure manufacturable
Solution Approach 2:
The patent changes the angular parameter at the second electrode interface from 90° to an acute angle (α2). This parameter modification prevents charge accumulation at the corner without complicating the manufacturing process, thus resolving the contradiction between ease of manufacture and reliability
3Device complexity
If larger resistance occurs at the corners, then the transistor structure remains conventional, but heat generation increases making the transistor easier to burn
Solution Approach 1:
The patent modifies the geometric parameters (angles α1 and α2) of the active layer to be acute angles less than 90°. This parameter change reduces resistance at the corners, which directly reduces heat generation (Q=I²Rt) without requiring changes to the overall transistor structure or additional components
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 design reduces resistance and heat generation at corners, enhancing the reliability and service life of the display panel by minimizing the risk of transistor burning.
Implementation Method 1
charge accumulation occurs at the two corners, resulting in a larger resistance at the corners
Implementation Method 2
the larger the resistance R is, the larger the generated heat Q is, and the easier the thin film transistor 200 is burned
Data Source
AI summary
The present disclosure provides an array substrate and a display panel. According to the present disclosure, angles between two side walls of a first sub-active part and a first bottom surface of a side of the first sub-active part close to a second active part are both acute angles, thereby reducing an angle of a corner experienced by a signal transmitted from a first electrode to a second electrode via an active layer. Therefore, a current distribution is optimized, a resistance at the corner is reduced, and the generated heat is reduced under the condition that the current is not changed, thereby improving service life of the display panel and reliability of the display panel.