Oxide TFT LCD Interlayer Color Resin for Light-Stable Pixels
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Liquid crystal display devices using oxide semiconductors face challenges in stabilizing the electric characteristics of thin film transistors due to photosensitivity, which affects aperture ratio and image quality, especially when a color filter layer is provided on the counter substrate side, leading to potential image degradation and increased complexity in manufacturing.
Innovation Solution
Incorporating a light-transmitting chromatic color resin layer as both an interlayer film and color filter, which attenuates incident light intensity without reducing the aperture ratio, and optionally using a light-blocking layer to prevent light leakage and stabilize the thin film transistor characteristics, thereby improving contrast and definition.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a color filter layer is provided on the counter substrate side, then color display function is achieved, but precise positional alignment becomes difficult and image quality may be degraded
Solution Approach 1:
The patent combines the interlayer film and color filter layer into a single integrated structure. The interlayer film containing the oxide semiconductor layer serves dual functions as both the transistor channel layer and the color filter, eliminating the need for separate color filter layers on the counter substrate and thus avoiding alignment issues between multiple layers
Solution Approach 2:
The interlayer film is designed to perform multiple functions simultaneously: it acts as the channel formation region for the thin film transistor, provides light-blocking functionality, and serves as the color filter layer. This multi-functionality reduces the number of separate components and simplifies the manufacturing process
2Illumination intensity
If the oxide semiconductor layer is exposed to light, then transparent display is achieved, but electric characteristics vary due to photosensitivity
Solution Approach 1:
The patent applies different light-transmittance characteristics to different regions of the display device. The pixel regions maintain high light transmittance for transparent display, while the interlayer film regions containing oxide semiconductor layers provide light-blocking to protect against photosensitivity. This local differentiation allows simultaneous achievement of transparent display and stable electric characteristics
Solution Approach 2:
The patent introduces an intermediate light-blocking structure within the interlayer film that mediates between the need for light transmission in pixel regions and the need for light protection in semiconductor regions. This intermediate structure selectively blocks light from reaching the oxide semiconductor layer while allowing light to pass through to the pixel electrodes
3Reliability
If a light-blocking layer is added to stabilize transistor characteristics, then electric stability improves, but device structure becomes more complex
Solution Approach 1:
The patent merges the light-blocking layer with the interlayer film structure, so that the light-blocking functionality is integrated into the existing interlayer film rather than being added as a separate component. This integration achieves transistor characteristic stability without significantly increasing device complexity
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
This configuration stabilizes the electric characteristics of thin film transistors, enhances image quality by maintaining aperture ratio, and simplifies the manufacturing process by allowing precise control over pixel formation and reducing the need for complex alignment, resulting in high-definition and reliable liquid crystal display devices.
Implementation Method 1
a film having a function of attenuating the intensity of transmitting visible light is used as an interlayer film which covers at least the oxide semiconductor layer
Implementation Method 2
An oxide semiconductor is a transparent semiconductor which transmits light in a visible wavelength range
Data Source
AI summary
To provide a liquid crystal display device suitable for a thin film transistor which uses an oxide semiconductor. In a liquid crystal display device which includes a thin film transistor including an oxide semiconductor layer, a film having a function of attenuating the intensity of transmitting visible light is used as an interlayer film which covers at least the oxide semiconductor layer. As the film having a function of attenuating the intensity of transmitting visible light, a coloring layer can be used and a light-transmitting chromatic color resin layer is preferably used. An interlayer film which includes a light-transmitting chromatic color resin layer and a light-blocking layer may be formed in order that the light-blocking layer is used as a film having a function of attenuating the intensity of transmitting visible light.