Display Panel Pad Section for Static Discharge and Space Saving
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Solution Overview
Problem
Horizontal electric field liquid crystal display devices face challenges in spatial integration due to limited space and susceptibility to external static electricity, which can cause pictorial distortion.
Innovation Solution
A display device configuration that includes a display panel with a cell identification section and a pad section, both made from conductive materials like nickel, chrome, or alloys, which are physically isolated and connected to a Chip-On-Glass package, allowing for efficient grounding and discharge of static electricity, thereby reducing the spatial requirements for integration.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If pixel and common electrodes are placed under a bottom substrate in horizontal electric field LCD device, then electric field mode is changed to horizontal, but spatial room for integration is limited
Solution Approach 1:
The pad section is positioned in the non-display area of the display panel, utilizing the vertical dimension (depth of the device structure) rather than horizontal space. The pad section is disposed at a position corresponding to the non-display area when viewed from the front, allowing it to occupy space in the Z-dimension (thickness direction) rather than consuming valuable integration area in the XY-plane.
2Device complexity
If no electrode is equipped on top substrate in horizontal electric field LCD device, then structure is simplified, but discharging external static electricity becomes difficult
Solution Approach 1:
The pad section serves as an intermediary element that provides a conductive path from the top substrate to the ground. Although the top substrate itself does not have a complete electrode structure, the pad section acts as a mediator to enable static electricity discharge by providing a controlled conductive pathway to ground potential.
Solution Approach 2:
Instead of providing a complete electrode structure across the entire top substrate, the conductive properties are localized to specific areas where the pad section is disposed. The pad section is positioned in the non-display area, providing local conductivity only where needed for static discharge, rather than requiring global conductivity throughout the substrate.
3Device complexity
If external static electricity accumulates in horizontal electric field LCD device, then device structure remains simple, but pictorial distortion occurs due to molecular alignment changes
Solution Approach 1:
The pad section is pre-configured as a conductive pathway that proactively prevents static electricity accumulation before it can cause damage. By providing a ground connection in advance through the pad section in the non-display area, the device creates a preventive mechanism that neutralizes static charge before it can induce liquid crystal molecular alignment changes and cause pictorial distortion.
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 configuration effectively prevents static electricity damage and reduces the spatial room needed for integration, allowing for more efficient use of space and improved display performance.
Implementation Method 1
a pad section (500) at least partly disposed on the cell ID section (400) and at least partly overlaid with the cell ID section (400)... The pad section (500) may be configured to transfer a ground signal to the conductive layer (CL)
Data Source
AI summary
A display device includes a display panel which is configured to display an image, and includes a cell identification section configured to indicate an identification number of the display panel, and a pad section at least partly disposed on the cell identification section and being at least partly overlaid with the cell identification section, a printed circuit board configured to drive the display panel, and a chip-on-glass package electrically configured to connect the display panel with the printed circuit board.