Light Guide Plate Microstructures for Thin Anti-Peep Displays
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Solution Overview
Problem
Reflective display apparatuses face challenges in maintaining display quality and anti-peep functionality while minimizing thickness and ensuring efficient illumination, as adding anti-peep films and front light sources often increase overall thickness and compromise illumination effects.
Innovation Solution
A display apparatus with integrated optical microstructures on a single light guide plate, utilizing multiple light sources and microstructures to provide illumination and anti-peep functionality, reducing thickness and maintaining display efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If an additional anti-peep film is added to the display apparatus, then the anti-peep requirement is met, but the overall thickness increases
Solution Approach 1:
The patent combines the anti-peep function and illumination function into a single integrated optical microstructure layer on the light guide plate. The optical microstructures serve dual purposes: they create the anti-peep effect by controlling light reflection angles and provide illumination by guiding front light source beams. This merging eliminates the need for separate anti-peep film layers, thereby reducing overall thickness while maintaining both functions.
Solution Approach 2:
The optical microstructures on the light guide plate perform multiple functions simultaneously: (1) anti-peep function by reflecting oblique viewing angles, (2) illumination function by guiding front light source beams to the display surface, and (3) light distribution function for ambient light. This multi-functionality reduces the number of separate components needed, thereby reducing overall thickness.
2Illumination intensity
If a front light source is added to maintain display quality in low ambient light, then illumination needs are met, but the overall thickness increases
Solution Approach 1:
The patent integrates the front light source illumination function with the light guide plate structure. The light guide plate contains optical microstructures that guide the front light source beams directly to the display surface, combining the illumination function with the existing light guide structure. This integration eliminates the need for separate illumination layers or components, thereby reducing overall thickness while maintaining display illumination quality.
Solution Approach 2:
The light guide plate serves multiple functions: (1) guiding ambient light to the display surface, (2) guiding front light source beams for illumination in low ambient light conditions, and (3) providing the anti-peep effect through optical microstructures. This multi-functionality reduces the need for separate components, thereby reducing overall thickness.
3Object-affected harmful factors
If multiple separate components are used for anti-peep and illumination, then both functions are achieved, but the device complexity increases
Solution Approach 1:
The patent merges the anti-peep function and illumination function into a single integrated optical microstructure layer on the light guide plate. Instead of using separate anti-peep film and illumination layers, the optical microstructures perform both functions simultaneously, thereby reducing structural complexity and the number of assembly steps.
4Object-affected harmful factors
If additional layers are added for anti-peep and illumination, then both functions are achieved, but manufacturing precision requirements increase
Solution Approach 1:
The patent combines the anti-peep function and illumination function into a single integrated optical microstructure layer, eliminating the need for precise alignment between multiple separate layers. The optical microstructures are formed directly on the light guide plate, reducing manufacturing complexity and precision requirements compared to assembling separate anti-peep film and illumination layers.
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 achieves improved display quality and anti-peep functionality with reduced thickness by integrating optical microstructures and light sources on a single light guide plate, enhancing illumination and preventing interference.
Implementation Method 1
The first optical microstructures are disposed on the first light emitting surface of the light guide plate and each has a first light receiving surface facing the first light source. The first light beams pass through the second light emitting surface and exit the display apparatus after being reflected by the first light receiving surfaces of the first optical microstructures.
Implementation Method 2
The second optical microstructures are disposed on the second light emitting surface of the light guide plate and each has a second light receiving surface facing the second light source. The second light beams pass through the first light emitting surface and irradiate a display surface of the display panel after being reflected by the second light receiving surfaces of the second optical microstructures.
Data Source
AI summary
A display apparatus includes a light guide plate, a first light source, a second light source, multiple first optical microstructures, multiple second optical microstructures, and a display panel. The first light source and the second light source are disposed beside a first light incident surface and a second light incident surface of the light guide plate respectively. Multiple second light beams emitted from the second light source irradiate a display surface of the display panel after being reflected by multiple second light receiving surfaces of the second optical microstructures disposed on a second light emitting surface of the light guide plate. Multiple first light beams emitted from the first light source exit the display apparatus after being reflected by multiple first light receiving surfaces of the first optical microstructures disposed on a first light emitting surface of the light guide plate.