Shielding Metal Blocks Pre-Heat TFT Layer for Fast Activation
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Solution Overview
Problem
Low temperature environments, such as those found in northern China during winter, cause slow response and delayed activation of thin film transistor (TFT) elements in LCD and AMOLED displays due to slowed electron carrier movement, leading to suboptimal display performance.
Innovation Solution
An array substrate with a shielding metal layer comprising interconnected shielding metal blocks arranged in a matrix, where parallel combinations of these blocks are connected to a power source to generate heat and pre-heat the TFT layer, accelerating the activation of TFT elements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If conventional a-Si technology is used in TFT elements, then manufacturing is easier and cost is lower, but response speed is slow and activation is delayed in low temperature environments
Solution Approach 1:
The patent changes the material parameter from conventional a-Si to LTPS (low temperature polysilicon), which fundamentally alters the electrical properties and response characteristics of the TFT elements, enabling faster response speeds while maintaining compatibility with existing manufacturing processes
Solution Approach 2:
The patent applies preliminary heating to the array substrate before displaying content in low temperature environments. This pre-heating action prepares the LTPS-TFT elements by raising their temperature to an optimal operating range, ensuring fast response and immediate activation without delay when the display is turned on
2Speed
If LTPS-TFT elements are used to achieve fast response and high luminance, then display performance improves, but activation is delayed in low temperature conditions due to slowed electron carrier movement
Solution Approach 1:
The patent implements preliminary heating of the array substrate before display activation in low temperature environments. This pre-heating process raises the temperature of the LTPS-TFT elements to their optimal operating temperature range, ensuring that electron carrier movement is not slowed and that the display activates immediately without delay when powered on
Solution Approach 2:
The patent changes the operational temperature parameter of the LTPS-TFT elements by applying external heating. This parameter change counteracts the low temperature environmental condition, restoring the electron carrier mobility and response speed characteristics of LTPS-TFT elements to their optimal performance level
3Ease of manufacture
If shielding metal blocks are disconnected to simplify structure, then manufacturing is easier, but heating efficiency and uniformity deteriorate
Solution Approach 1:
The patent merges multiple independent shielding metal blocks into connected groups that serve dual functions: electromagnetic shielding and uniform heat distribution. By connecting these metal blocks through conductive pathways, the system achieves both structural simplicity and effective heating across the entire display area
Solution Approach 2:
The shielding metal blocks are designed to perform multiple functions simultaneously: providing electromagnetic shielding and acting as heating elements for uniform temperature distribution. This multi-functionality eliminates the need for separate heating components, simplifying the overall structure while maintaining heating effectiveness
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
The pre-heating method significantly improves the activation speed of TFT elements in low temperature conditions, ensuring faster and more reliable display performance.
Implementation Method 1
by connecting the two wires to a power source to supply electricity to the parallel combination to make the plurality of shielding metal blocks generating heat
Data Source
AI summary
The invention provides an array substrate and activation method for TFT elements in the array substrate. The array substrate comprises a shielding metal layer (10) and a TFT layer (20) disposed on the shielding metal layer (10); by connecting the shielding metal blocks (11) on the shielding metal layer (10) to electricity to heat up the shielding metal blocks (11) for pre-heating the TFT layer (20) to accelerate activating the TFT elements in the TFT layer (20). The activation method, by connecting the shielding metal blocks (11) on the shielding metal layer (10) to electricity to heat up the shielding metal blocks (11) for pre-heating the TFT layer (20) before activating the TFT elements in the TFT layer (20), accelerates activating the TFT elements in the TFT layer (20). The method is applicable to activating the TFT elements in array substrate in low temperature environment.