Display Substrate Composite Film for Wide Color Gamut
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Solution Overview
Problem
Existing display technologies face high manufacturing costs and material research challenges in achieving wide color gamut, either by requiring precise backlight adjustments or advanced color filters with narrower transmission spectra.
Innovation Solution
A display substrate with a composite film structure composed of thin films with different refractive indexes, such as silicon dioxide and silicon nitride, is used to absorb light between visible light peaks, reducing the transmission spectrum and achieving wide color gamut without increasing manufacturing complexity or costs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the backlight is changed from white LED to R/G/B LEDs to achieve wide color gamut, then the color gamut is improved, but the manufacturing precision requirement and manufacturing cost increase
Solution Approach 1:
The patent extracts the color gamut enhancement function from the backlight unit and relocates it to the display substrate through a composite film structure. This separates the color filtering function from the light generation function, allowing the backlight to remain simple while achieving wide color gamut through the substrate's optical interference structure.
Solution Approach 2:
The patent introduces a composite film structure as an intermediary element between the backlight and the liquid crystal layer. This structure uses multiple thin films with different refractive indexes to create optical interference that narrows the transmission spectrum, thereby enhancing color gamut without requiring complex backlight or color filter modifications.
2Reliability
If color filters with wide color gamut are used to narrow the transmission spectrum, then the color gamut is improved, but the material research cost and development time increase
Solution Approach 1:
The patent changes the approach from modifying color filter materials to controlling the optical parameters of thin films. By adjusting the thickness, refractive index, and layer configuration of the composite film structure, the transmission spectrum is narrowed through optical interference rather than material absorption, avoiding expensive material R&D while achieving wide color gamut.
Solution Approach 2:
The patent uses a composite film structure composed of multiple thin films with different refractive indexes (such as silicon dioxide and silicon nitride) to achieve spectral narrowing. This composite approach leverages the optical properties of common materials in a structured configuration, eliminating the need for specialized wide-gamut color filter materials.
3Reliability
If a composite film structure with multiple thin films is formed on the base substrate, then the transmission spectrum is narrowed and color gamut is improved, but the device complexity increases
Solution Approach 1:
The patent segments the color gamut enhancement function into multiple thin films with different refractive indexes, each contributing to the overall optical interference effect. This segmentation allows precise control of the transmission spectrum through layer thickness and material selection, achieving narrow bandwidth transmission while maintaining a manageable structure that can be integrated into existing display architectures.
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 composite film structure effectively absorbs light between visible light peaks, narrowing the transmission spectrum and enhancing the color gamut of display devices at a lower cost, utilizing existing materials and manufacturing processes.
Implementation Method 1
the composite film structure is capable of absorbing light with a wavelength in a predetermined wavelength range, and the predetermined wavelength range is located between two adjacent peaks of visible light waves
Implementation Method 2
a composite film structure formed on the base substrate and composed of at least two thin films having different refractive indexes
Data Source
AI summary
The present disclosure provides a display substrate and a method for manufacturing the same, a display panel and a display device. The display substrate includes a base substrate; and a composite film structure formed on the base substrate and composed of at least two thin films having different refractive indexes, wherein the composite film structure is capable of absorbing light with a wavelength in a predetermined wavelength range, and the predetermined wavelength range is located between two adjacent peaks of visible light waves.