Array Substrate Insulating Layer Thickness for LCD Transmissivity
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Solution Overview
Problem
Increasing the thickness of the organic layer in LCD panels to enhance luminance and reduce parasite capacitance leads to decreased thickness uniformity, causing spot defects like red and white spots due to transmissivity variations, particularly affecting red light.
Innovation Solution
An array substrate with a switching element connected to gate and source lines, featuring a first insulating layer on the switching element and a second insulating layer under it, with the thickness of the second layer adjusted based on the peak wavelength of red light to minimize transmissivity variations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If the thickness of the organic layer is increased to increase the opening ratio and minimize parasite capacitance, then the luminance is improved, but the thickness uniformity is decreased causing spot defects
Solution Approach 1:
The patent introduces a new dimensional parameter - the thickness of the lower insulating layer - to compensate for variations in the organic layer thickness. By controlling the lower insulating layer thickness based on the peak wavelength of red light, the invention compensates for the thickness non-uniformity of the organic layer, thereby maintaining uniform transmissivity and eliminating spot defects while preserving the increased luminance benefits.
2Reliability
If the thickness of the organic layer is increased to minimize parasite capacitance, then the image quality is improved, but the transmissivity uniformity is decreased causing color variations
Solution Approach 1:
The patent changes the physical parameter of the lower insulating layer thickness to a specific value determined by the peak wavelength of red light. This parameter adjustment compensates for the transmissivity variations caused by organic layer thickness non-uniformity, thereby maintaining color uniformity and improving overall image quality while preserving the electrical benefits of increased organic layer thickness.
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 improves image display quality by reducing spot defects and ensuring uniform transmissivity across different wavelengths, particularly for red light, thereby enhancing the overall luminance and clarity of the LCD panel.
Implementation Method 1
a thickness of the second insulating layer being adjusted to minimize a transmissivity variation caused by a thickness variation of the first insulating layer
Data Source
AI summary
An array substrate including a plurality of pixel regions transmitting light includes a switching element disposed in each of the pixel regions defined by gate and source lines, wherein the switching element is electrically connected to the gate and source lines, a pixel electrode electrically connected to the switching element, a first insulating layer disposed on the switching element, and a second insulating layer disposed under the first insulating layer, wherein a thickness of the second insulating layer is dependent on a peak wavelength of red light.