Light Guide Plate Slope Light Recovery for Backlight Brightness
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Solution Overview
Problem
Existing light guide plates in backlight modules suffer from significant light loss due to the bell mouth structure, where light emitted from the source is irradiated on a slope, leading to reduced brightness and poor image quality.
Innovation Solution
A light guide plate design with a slope that gradually reduces in thickness and incorporates a light guide component, such as a reflective layer, mesh dots, or microstructure prisms, to redirect light towards the exit surface, minimizing light loss and enhancing energy utilization.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If a bell mouth structure with a slope is formed at the incident surface of the light guide plate, then the thickness of the light guide plate can be reduced, but light energy is lost through the slope resulting in low brightness and poor image quality
Solution Approach 1:
The patent applies this principle by converting the harmful light loss at the slope into a beneficial effect. Instead of letting light escape through the slope, a reflective layer is added to reflect the light back into the light guide plate, transforming the harmful light loss into useful light that contributes to the backlight output, thereby improving brightness while maintaining the reduced thickness design
Solution Approach 2:
The patent applies this principle by making the light guide plate have different properties at different locations. The thickness of the light guide plate varies along its length, with the incident surface area being larger than the exit surface area, creating a gradual transition zone. This local variation in thickness allows the plate to maintain structural integrity while enabling effective light guidance and reducing overall material usage
2Volume of moving object
If a bell mouth structure with a slope is formed at the incident surface, then the light guide plate thickness is reduced, but the brightness of the backlight module decreases due to light loss
Solution Approach 1:
The reflective layer converts the harmful light loss at the slope into beneficial light output. By reflecting light that would otherwise escape back into the light guide plate, the system recovers lost light energy and directs it toward the exit surface, thereby maintaining high brightness despite the reduced thickness
Solution Approach 2:
The reflective layer is applied in advance to the slope surface before final assembly. This preliminary action ensures that light loss is prevented from the outset, allowing the light guide plate to maintain optimal brightness performance throughout its operational life without requiring subsequent adjustments
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 light loss at the slope, improving the utilization efficiency of light energy and increasing the brightness of the backlight module by guiding more light towards the effective display area.
Implementation Method 1
the slope is provided with a light guide component for guiding the light that is emitted towards the slope towards an area inside the light guide plate that corresponds to the exit surface
Data Source
AI summary
The present disclosure relates to a field of display technology and discloses a light guide plate and a method of producing the same. The light guide plate includes a body having a surface which forms an incident surface, an exit surface and a slope, wherein the incident surface is perpendicular to the exit surface, and the incident surface and the exit surface are connected by the slope, wherein in a direction perpendicular to the incident surface and from the incident surface towards the exit surface, thickness of location of the light guide plate where the slope is formed is gradually reduced, and wherein the slope is provided with a light guide component for guiding the light that is emitted towards the slope towards an area inside the light guide plate that corresponds to the exit surface.