Light Source Module Ink Coating for Blue Light Leakage
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Solution Overview
Problem
Narrowed frames in liquid crystal display devices lead to light leakage or halo issues, particularly blue light leakage, which affects the image quality at the edges.
Innovation Solution
A light source module comprising a light guide plate, a light source, a first color conversion film, optical films, and an ink coating, where the ink coating is applied on the surface edges or end surfaces of these components to convert and transmit light, reducing blue light leakage by converting blue light into different colors.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Length of moving object
If the frame is narrowed to achieve lighter and thinner electronic products, then the device thickness and weight are reduced, but light leakage and blue phenomenon occur at the edges
Solution Approach 1:
An ink coating layer is introduced as an intermediary between the optical components and the environment. This ink layer selectively absorbs blue light wavelengths while allowing other wavelengths to pass through, thereby mediating the harmful blue light leakage without compromising the narrowed frame design
Solution Approach 2:
The ink coating is specifically designed to change or filter light color by absorbing blue light wavelengths. This color filtering approach directly addresses the blue phenomenon at edges while maintaining the overall light output and display quality
2Use of energy by moving object
If blue light emitting diodes are used to achieve energy efficiency, then energy consumption is reduced, but blue light leakage and halo effects occur around the display area
Solution Approach 1:
The harmful blue light leakage is converted into a beneficial solution by applying an ink coating that selectively absorbs blue light. The same blue light LEDs that provide energy efficiency are now paired with an ink layer that neutralizes their harmful edge effects, transforming the problem into a solved configuration
Solution Approach 2:
The optical properties of the light transmission path are modified by introducing the ink coating with specific absorption characteristics. This parameter change in the optical path selectively removes blue light wavelengths while preserving the energy-efficient LED operation
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 blue light leakage and halo issues at the edges of the display, improving image quality by converting blue light into other colors, thereby minimizing the blue phenomenon in liquid crystal display devices.
Implementation Method 1
the ink coating can achieve the effect of lightening the blue light when the light source emits blue light, thereby reducing the blue phenomenon of light leakage at the edge of the light source module
Data Source
AI summary
A light source module includes a light guide plate, a light source, a first color conversion film, at least one optical film and an ink coating. The light guide plate has a first light-emitting surface, a second light-emitting surface opposite to the first light-emitting surface, and a light-incident surface connected between the first light-emitting surface and the second light-emitting surface. The light source is disposed beside the light-incident surface. The first color conversion film is disposed beside the first light-emitting surface. The at least one optical film is disposed beside the light guide plate. The ink coating is disposed on a surface edge or an end surface of at least one of the light guide plate, the first color conversion film, and the at least one optical film, and is configured to allow light to pass therethrough. A display device of the invention is further provided.