Composite Cover Structure for Display Optical Contrast
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Solution Overview
Problem
Conventional methods for increasing optical contrast in display devices with front light modules often conflict when the module is turned on or off, leading to increased variation in optical contrast and complexity in the laminated structure, which degrades user experience.
Innovation Solution
A display device with a functional module featuring a composite cover structure, a reflective display panel, and at least one medium layer with a refractive index greater than or equal to 1 and smaller than 1.474, strategically positioned between the cover structure and the light guide plate or touch module, balances optical contrast when the front light module is turned on and off, reducing the complexity of the laminated structure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If an anti-glare layer is disposed on the surface of the display device to increase optical contrast when the front light module is off, then the optical contrast when off is improved, but the variation of optical contrast increases and the complexity of the laminated structure increases
Solution Approach 1:
The patent merges the anti-glare function with the existing cover structure by forming an anti-glare layer on the surface of the first plate through surface treatment (such as etching or coating). This integration eliminates the need for a separate anti-glare layer in the laminated structure, thereby improving optical contrast when the front light module is off without increasing the complexity of the laminated structure.
Solution Approach 2:
The patent applies surface treatment (etching or coating) to the first plate to create an anti-glare effect that modifies the optical properties of the surface. This treatment creates a textured or coated surface that scatters ambient light, improving optical contrast when the front light module is off, while maintaining a simple laminated structure.
2Illumination intensity
If light is emitted asymmetrically from the upper side and lower side of the light guide plate to increase optical contrast when on, then the optical contrast when on is improved, but the variation of optical contrast increases
Solution Approach 1:
The patent applies different surface treatments to different regions of the first plate. Specifically, the region corresponding to the light guide plate has a different anti-glare treatment compared to other regions. This local differentiation allows the light guide plate region to maintain better optical contrast when the front light module is on, while other regions provide anti-glare functionality when off, thereby reducing the variation of optical contrast.
Solution Approach 2:
The patent introduces a medium layer with a specific refractive index (1.35-1.45) between the light guide plate and the first plate. This intermediary layer mediates the optical interaction between the light guide plate and the cover structure, helping to maintain stable optical contrast when the front light module is on while reducing the overall variation of optical contrast.
3Stability of the object's composition
If more layers are added to the laminated structure to adjust optical contrast variation, then the optical contrast control is improved, but the complexity of the laminated structure increases
Solution Approach 1:
The first plate serves multiple functions: it acts as a cover structure, provides anti-glare functionality through surface treatment, and includes a medium layer with specific refractive index to control optical properties. This multi-functionality allows the patent to control optical contrast variation without adding additional layers to the laminated structure, thereby maintaining structural simplicity.
Solution Approach 2:
The patent controls optical contrast variation by adjusting the refractive index parameter of the medium layer (set between 1.35-1.45) and the surface treatment parameters of the first plate. By optimizing these parameters, the patent achieves stable optical contrast without increasing the number of layers or complexity of the laminated structure.
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 the variation of optical contrast, enhancing the optical contrast when the front light module is turned on while maintaining it when turned off, thereby improving user experience without increasing the complexity of the laminated structure or damaging the original mechanism design.
Implementation Method 1
The refractive index of the medium layer is greater than or equal to 1 and is smaller than 1.474
Data Source
AI summary
A functional module is applied in a front light module of a display device. The functional module includes a composite cover structure having a first plate and a second plate and a reflective display panel. The second plate is located between the first plate and the reflective display panel. At least one medium layer is located between the first plate of the composite cover structure and the reflective display panel. The refractive index of the medium layer is greater than or equal to 1 and is smaller than 1.474.