Display Panel Column Spacer Light Shielding
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Solution Overview
Problem
Existing display panels suffer damage from light sources due to the exposure of thin film transistors, which is not effectively mitigated by current technologies.
Innovation Solution
A display panel design incorporating a column spacer made of polymer resin with pigments or dyes that shield specific wavelengths of light, specifically blue light, to protect the activation layer of the thin film transistor, and a method of manufacturing this panel by forming the spacer on the display substrate to cover the activation layer.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the activation layer of the thin film transistor is exposed to light from the light source, then the display panel can achieve simple structure and easy manufacturing, but the thin film transistor suffers damage reducing reliability
Solution Approach 1:
The patent introduces a column spacer as an intermediary component between the light source and the activation layer. This spacer is specifically designed with light-shielding properties to block harmful light wavelengths from reaching the activation layer, thereby protecting the thin film transistor while maintaining the overall simplicity of the display panel structure.
Solution Approach 2:
The patent applies local quality by making the column spacer positioned directly over the activation layer have light-shielding properties, while other parts of the display panel maintain their original transparent or non-shielding characteristics. This localized approach protects the vulnerable activation layer without unnecessarily complicating or obscuring other functional areas of the display panel.
2Reliability
If a light-shielding column spacer is added to protect the activation layer, then the thin film transistor is protected from light damage, but the device complexity increases
Solution Approach 1:
The patent merges the light-shielding function with the existing column spacer structure that is already part of the display panel assembly. By integrating the protective function into an existing structural component rather than adding a separate layer or component, the manufacturing process is simplified while still achieving the desired protection effect.
Solution Approach 2:
The column spacer is constructed using composite materials that combine structural integrity with light-shielding properties. This allows the spacer to fulfill multiple functions simultaneously - maintaining the physical structure of the display panel while blocking harmful light wavelengths - without requiring additional separate components or complex manufacturing steps.
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 reduces damage to the thin film transistor by shielding the light source's output, thereby enhancing the panel's durability and performance.
Implementation Method 1
The column spacer is configured to shield the first color light
Implementation Method 2
a pigment or a dye dispersed in the polymer resin, the pigment or the dye being configured to shield the first color light
Data Source
AI summary
A display device includes a display panel and a light source configured to provide a first color light to the display panel. The display panel includes a first display substrate (DS), a second DS facing the first DS, a column spacer disposed between the first and second DSs, and a liquid crystal layer filled between the first and second DSs. The first DS includes: a first base substrate (FBS); a thin film transistor (TFT) disposed on the FBS, the TFT including a gate electrode, first and second electrodes, and an activation layer; a first insulation layer (IL) covering the TFT and disposed on the FBS; and a second IL disposed on the first IL and including an opening exposing a first portion of the first IL overlapping the activation layer. The column spacer is disposed on the first portion to cover the activation layer and shield the first color light.