Light Guide Assembly with Profiled Adhesion Layers for Luminance Control
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Solution Overview
Problem
Total reflective display devices experience degraded display effects in low ambient light conditions due to reduced light rays incident into the display assembly, and existing adhesion methods with optical clear adhesives affect light ray angles and mixing distances, leading to uneven luminance and reduced display quality.
Innovation Solution
A light guide assembly comprising multiple transparent adhesion layers with specific profiles and refractive indices, and a light guide panel, where the profiles are designed to refract light rays and increase incident light, and an additional adhesion layer ensures bubble-free contact with the panel, enhancing optical properties.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If optical clear adhesive is used for adhesion, then adhesion strength is improved, but light ray angle control deteriorates and luminance uniformity decreases
Solution Approach 1:
The patent divides the adhesion structure into multiple transparent adhesion layers (first, second, and third layers) with different functions. The first layer provides adhesion between the light guide panel and reflective display assembly, the second layer provides adhesion between the light guide panel and touch panel, and the third layer provides adhesion between the light guide panel and the front surface. This segmentation allows each layer to be optimized for its specific function, maintaining adhesion strength while controlling light ray angles through profile structures on specific layers.
Solution Approach 2:
The patent applies profile structures (such as prismatic patterns or microlens arrays) only on specific surfaces of the transparent adhesion layers where light ray angle control is needed, rather than uniformly across all adhesion surfaces. This local application of optical structures allows precise control of luminance uniformity and light distribution while maintaining simple adhesion interfaces where profiles are not needed.
2Use of energy by moving object
If ambient light is sufficient, then power consumption is reduced, but display quality deteriorates in low ambient light conditions
Solution Approach 1:
The patent uses transparent adhesion layers with specifically controlled refractive indices (different from the light guide panel material) to optimize light ray refraction and reflection parameters. By adjusting the refractive index parameter of the adhesion layers and the geometric parameters of the profile structures, the system maximizes light utilization efficiency across different ambient light conditions, maintaining display quality whether using ambient light or backlight.
3Illumination intensity
If profile structures are added to adhesion layers, then light refraction and luminance uniformity are improved, but manufacturing complexity increases
Solution Approach 1:
The patent combines the adhesion function and the optical function (light refraction and distribution) into a single integrated component - the transparent adhesion layer with profile structures. This merging eliminates the need for separate adhesive layers and separate optical control elements, simplifying the overall manufacturing process while achieving both strong adhesion and uniform luminance distribution.
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 increases overall luminance and uniformity of light rays, improving display quality by refracting light rays and ensuring proper adhesion, thus enhancing the display effect even in low ambient light conditions.
Implementation Method 1
the first profile and the second profile being formed to be in positive fit with each other and configured to incur light refraction at an interface therebetween of light rays being incident upon the first transparent adhesion layer from the second transparent adhesion layer to decrease an incident angle of the light rays
Implementation Method 2
a third transparent adhesion layer, arranged between the second transparent adhesion layer and the light guide panel, and configured to fix the second transparent adhesion layer relative to the light guide panel by adhesion
Implementation Method 3
The solution effectively increases overall luminance and uniformity of light rays, improving display quality in both sufficient and insufficient ambient light conditions by refracting and reflecting light rays efficiently within the total reflective display device
Data Source
AI summary
A light guide assembly, a total reflective display device and a method for manufacturing a light guide assembly are provided in the embodiments of the disclosure, the light guide assembly including: a first transparent adhesion layer, having a first profile formed thereon; a second transparent adhesion layer adhered to the first transparent adhesion layer and formed with a second profile corresponding to the first profile on a side of the second transparent adhesion layer adhered to the first transparent adhesion layer, the first profile and the second profile being formed to be in positive fit with each other and configured to incur light refraction at an interface therebetween of light rays being incident upon the first transparent adhesion layer from the second transparent adhesion layer to decrease an incident angle of the light rays; and a light guide panel, arranged on a side of the second transparent adhesion layer facing away from the first transparent adhesion layer.