Display Panel Anti-Static Rings for Touch Signal Shielding
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Display panels with integrated touch functions face issues of electro-static discharging and uneven image quality due to the conductive ITO layer shielding touch signals and failing to effectively manage surface charges, leading to poor touch control and image quality.
Innovation Solution
A display panel design that includes a display substrate with preset points electrically connected to a color film polarizer and a grounding line connected to the driving circuit, forming independent anti-static rings to prevent charge accumulation and facilitate electro-static discharging, thereby improving touch sensitivity and image quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a conductive ITO layer is coated on the color film substrate to conduct surface charges and prevent charge accumulation, then electro-static discharging is improved, but the ITO layer shields touch signals resulting in insufficient touch signal quantity and poor touch control
Solution Approach 1:
The patent divides the anti-static function into two separate components: preset points (conductive elements) and grounding lines (charge discharge paths). This segmentation allows the preset points to be minimally invasive to touch signals while grounding lines handle the charge discharge function, resolving the contradiction between electro-static discharging and touch signal shielding.
Solution Approach 2:
The patent extracts the grounding function from the ITO layer by introducing separate grounding lines that are electrically connected to the driving circuit. This extraction allows the ITO layer to be removed or minimized, eliminating its shielding effect on touch signals while maintaining electro-static discharging capability through the dedicated grounding lines.
2Reliability
If a conductive ITO layer is coated on the color film substrate to prevent charge accumulation, then electro-static discharging is improved, but image quality becomes uneven due to ESD Mura phenomenon
Solution Approach 1:
The patent segments the charge discharge function into discrete preset points and grounding lines, allowing precise control over charge discharge locations. This segmentation prevents the widespread charge discharge paths that cause ESD Mura, while still providing effective electro-static protection through the structured arrangement of preset points and grounding lines.
Solution Approach 2:
The patent extracts the charge discharge function from the continuous ITO layer and implements it through discrete preset points and grounding lines. This extraction eliminates the ITO layer's interference with light transmission that causes ESD Mura, while maintaining electro-static discharging capability through the dedicated grounding structure.
3Object-affected harmful factors
If the ITO layer is removed to improve touch signal quantity, then touch control performance is improved, but charge accumulation occurs leading to poor electro-static discharging
Solution Approach 1:
The patent extracts the grounding function from the ITO layer and implements it through separate grounding lines connected to the driving circuit. This allows complete removal of the ITO layer to eliminate touch signal shielding, while the extracted grounding function is restored through the dedicated grounding line structure.
Solution Approach 2:
The patent introduces preset points as intermediary conductive elements that connect the color film substrate to grounding lines. These preset points serve as mediators to establish charge discharge paths without requiring a continuous ITO layer, thus maintaining electro-static discharging while improving touch signal quality.
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 effectively prevents static electricity from entering the display panel, enhancing touch sensitivity and image quality by conducting and discharging surface charges through independent anti-static rings, ensuring effective electro-static discharging and reducing charge accumulation.
Implementation Method 1
the at least two preset points are electrically connected to the color film polarizer, and the at least two preset points are electrically connected to the driving circuit, so as to form at least one first anti-static ring; and at least one grounding line, wherein the at least one grounding line is electrically connected to the array substrate, and electrically connected to the driving circuit, so as to form at least one second anti-static ring surrounding the display substrate
Implementation Method 2
which conducts surface charges through an ITO layer to avoid charge accumulation, which forms poor electro-static discharging
Data Source
AI summary
The display panel includes: a display substrate, wherein the display substrate includes a color film substrate and an array substrate, a surface of the color film substrate away from the array substrate is provided with a color film polarizer, at least two preset points are provided on the display substrate, the at least two preset points are electrically connected to the color film polarizer, and the at least two preset points are electrically connected to the driving circuit, so as to form at least one first anti-static ring; and at least one grounding line, wherein the at least one grounding line is electrically connected to the array substrate, and electrically connected to the driving circuit, so as to form at least one second anti-static ring surrounding the display substrate. A display device is also provided.