Backlight Module Partition Dimming via Elastic Reflecting Elements
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Solution Overview
Problem
Wearable display devices, such as VR glasses, face challenges with poor partition dimming performance due to their small size, resulting in inadequate light and shade contrast, making it difficult to distinguish detailed image differences.
Innovation Solution
A backlight module with a light guide plate and dimming units, where the light source is positioned on one side and dimming units are on the lower surface of a transparent substrate, allowing for adjustable light intensity and enhanced dimming performance through elastic reflecting elements and pressure control units, enabling precise partition dimming and improved contrast.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If the volume of VR glasses is reduced for wearability, then the device becomes more portable and comfortable, but the partition dimming performance of the backlight module deteriorates
Solution Approach 1:
The backlight module is divided into multiple independently controllable dimming units, each corresponding to specific display regions. This segmentation allows precise control of light intensity in different areas, achieving good partition dimming performance even in the compact VR glasses structure.
Solution Approach 2:
Different regions of the display screen are assigned different light intensity characteristics through the dimming units. Each dimming unit can independently adjust its light output, creating local quality variations that enhance image detail discrimination while maintaining the small form factor.
2Manufacturing precision
If the partition dimming performance is improved, then the light and shade contrast is enhanced, but the device complexity increases
Solution Approach 1:
The dimming units are integrated directly into the backlight module structure, combining the lighting and dimming control functions in a unified design. This merging approach achieves enhanced partition dimming performance without proportionally increasing overall device complexity.
3Manufacturing precision
If the number of dimming partitions is increased, then the image detail discrimination is improved, but the light intensity uniformity becomes harder to maintain
Solution Approach 1:
The light intensity of each dimming unit is dynamically adjusted by changing electrical parameters (voltage or current) applied to the light source. This parameter control allows each partition to achieve its required brightness level while the system maintains overall light intensity uniformity through coordinated adjustment of all dimming units.
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 enhances the dimming performance of the backlight module, improving light and shade contrast, allowing for better discrimination of image details and addressing the decline in dimming performance associated with small dimming partitions.
Implementation Method 1
said elastic reflecting element is configured to produce an elastic deformation when the pressure is provided by said squeezing unit and change a contact area with said transparent substrate
Implementation Method 2
said plurality of dimming units is disposed on the lower surface of the transparent substrate and adjusts intensity of the light incident from said light source into said light guide plate and emergent from the upper surface of said transparent substrate facing away from said dimming units
Data Source
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AI summary
The present disclosure provides a backlight module. Said backlight module comprises a light source and a light guide plate. Said light guide plate comprises a transparent substrate and a plurality of dimming units having a reflecting function. Said light source is disposed on at least one side of said transparent substrate, and said plurality of dimming units is disposed on a lower surface of the transparent substrate for adjusting an emergent intensity of light, which is incident from said light source into said light guide plate, on an upper surface of said transparent substrate facing away from said dimming units. The present disclosure further provides a method for controlling a backlight module and a display screen and wear device including said backlight module.