Photochromic Filter Layer for Display Panel Light Leakage Control
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Solution Overview
Problem
Display panels face challenges in achieving high color purity due to light leakage, which affects the clarity and accuracy of color images, particularly in multimedia devices with self-luminescent light-emitting elements.
Innovation Solution
Incorporating a filter layer with a photochromic compound that changes its structure in response to light, allowing selective transmission of specific wavelengths, thereby suppressing light leakage and enhancing color purity characteristics.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If a conventional filter layer is used to block light, then light leakage is reduced, but color purity characteristics deteriorate due to loss of specific wavelength transmission
Solution Approach 1:
The filter layer uses photochromic compounds that dynamically change their light transmission properties based on the wavelength of incident light. When exposed to blue light (400-480 nm), the compounds undergo photochemical transformation to block this wavelength range, while automatically returning to their original state to transmit other wavelengths, enabling adaptive light control that resolves the contradiction between blocking harmful light and maintaining color purity
Solution Approach 2:
The photochromic compounds in the filter layer change their molecular structure parameters in response to specific wavelength light exposure. The conjugation bond length and electronic state parameters change when exposed to blue light, transforming the material's optical properties from transparent to absorbing in the 400-480 nm range, thereby selectively blocking harmful wavelengths while preserving transmission of other colors
2Manufacturing precision
If selective light transmission is achieved using fixed wavelength filters, then color purity is improved, but light leakage in specific wavelength regions cannot be suppressed
Solution Approach 1:
The filter layer incorporates photochromic compounds that undergo color changes based on light wavelength exposure. These compounds are specifically designed to change from transparent to light-absorbing state when exposed to blue light wavelengths (400-480 nm), providing selective color-based light control that simultaneously achieves color purity enhancement and targeted light leakage suppression
Solution Approach 2:
The photochromic compounds act as intermediary substances between the incident light and the display panel. They mediate the light transmission by absorbing specific blue light wavelengths through photochemical reactions, converting harmful high-energy photons into harmless thermal energy, while allowing other wavelengths to pass through unchanged, thus protecting the display while maintaining color accuracy
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 use of a photochromic compound in the filter layer effectively reduces light leakage and improves color purity, resulting in higher brightness and better color reproduction in display devices.
Implementation Method 1
a photochromic compound having a conjugation bond reversibly elongatable by absorbable light in a wavelength region of the first light
Implementation Method 2
the light control member including a light converting element to initiate a change in wavelength of a first light
Data Source
AI summary
According to one aspect of the invention, a display panel, includes: a first layer; a light control member disposed on the first layer, the light control member including a light converting element to initiate a change in wavelength of a first light to be emitted from the first layer; and a filter disposed on the light control member, the filter including a photochromic compound having a conjugation bond reversibly elongatable by absorbable light in a wavelength region of the first light to allow selective transmission of light in a wavelength region of about 480 nm or longer.