Touch Control Display Panel with Dual-Gate TFTs
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Solution Overview
Problem
Inbuilt touch control display panels face challenges due to the capacitive touch control structure interfering with liquid crystal arrangements, and they require complex and costly processes for integration with display structures.
Innovation Solution
A touch control display panel design featuring a TFT array substrate with dual-gate TFTs and a color film substrate with electrically conductive posts that modulate currents, allowing for touch control without interfering with the display, and integrating touch control and display functions at a reduced cost and complexity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a capacitive touch control structure is integrated onto the color film substrate, then inbuilt touch control is achieved, but the structure interferes with liquid crystal arrangement and hinders display
Solution Approach 1:
The display panel is divided into separate functional layers: the TFT array substrate contains the touch control TFTs while the color film substrate contains the liquid crystal display structure. This segmentation allows each layer to perform its function independently without interference, resolving the contradiction between integrated touch control and display performance
Solution Approach 2:
A bridge structure connects the TFT array substrate and color film substrate, serving as an intermediary that enables signal transmission between the touch control TFTs and external circuits without requiring the capacitive structure to be integrated on the color film substrate. This mediator allows touch control functionality while preserving liquid crystal display performance
2Ease of manufacture
If a capacitive touch control structure is integrated onto the TFT array substrate, then manufacturing cost is reduced and process is simplified, but the structure interferes with liquid crystal arrangement
Solution Approach 1:
The invention segments the touch control function into a separate TFT array substrate that can be manufactured independently using standard TFT processes. This segmentation maintains manufacturing simplicity while preventing the touch control structure from interfering with liquid crystal arrangement on the color film substrate
Solution Approach 2:
The touch control TFTs are positioned on the TFT array substrate in a spatial arrangement that projects through the bridge structure to the color film substrate, allowing touch control functionality to be achieved in a different dimensional plane without interfering with the liquid crystal layer on the color film substrate
3Reliability
If touch control and display structures are prepared separately, then integration complexity increases and cost rises, but each structure can be optimized independently
Solution Approach 1:
The invention merges the touch control TFT array with the display structure through the bridge connection, creating an integrated inbuilt touch control display panel. This merging allows both functions to coexist in a single device while maintaining the ability to optimize each structure independently during the design and manufacturing stages
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 solution enables seamless touch control without affecting liquid crystal displays and reduces the cost and complexity of integrating touch control structures, ensuring compatibility and efficient operation.
Implementation Method 1
a plurality of electrically conductive posts arranged on a surface of the color film substrate facing the TFT array substrate, the electrically conductive posts being arranged in opposition to the touch control dual-gate TFTs to modulate currents of the touch control dual-gate TFTs
Data Source
AI summary
The invention discloses a touch control display panel and a touch control display apparatus, where the touch control display panel includes a TFT array substrate and a color film substrate arranged in opposition; the TFT array substrate includes a pixel array and a touch control dual-gate TFT array; and when there is a touch control occurring, an electrically conductive post at a press location approaches the touch control dual-gate TFT along with a press, and a channel current of the touch control dual-gate TFT can be modulated by a current generated by the electrically conductive post. There will be no interference with a display per se in operation of the touch control, and no adverse influence imposed on the arrangement of liquid crystals in the liquid crystal display panel. The process of preparing the pixel array can be compatible with that of the touch control dual-gate TFTs, greatly lowering cost.