Double-Sided Display Optical Layer for Ambient Light Contrast
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Solution Overview
Problem
Conventional double-sided display devices suffer from decreased contrast due to ambient light interference and have a large thickness and high power consumption.
Innovation Solution
A display device with a first and second display panel and a first optical structure layer, including an anti-glare and anti-reflection layer, to reduce ambient light reflection and maintain image quality while minimizing thickness and power consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a conventional double-sided display device uses two backlight modules to illuminate both display panels, then both sides can display images, but the device thickness becomes large and power consumption increases
Solution Approach 1:
The patent merges the backlight illumination function into a single shared backlight module that serves both display panels, rather than using separate backlight modules for each panel. This consolidation reduces the overall device thickness while maintaining double-sided display capability.
Solution Approach 2:
The patent introduces a light guide plate that redirects light from the single backlight module to illuminate both display panels from different directions. This optical routing in another dimension allows one backlight to serve dual purposes without increasing thickness.
2Illumination intensity
If a conventional double-sided display device uses two separate backlight modules, then each panel receives adequate illumination, but power consumption becomes high
Solution Approach 1:
The patent combines two separate backlight modules into a single shared backlight module, reducing the total number of light sources and thereby decreasing overall power consumption while maintaining adequate illumination for both panels through the light guide plate.
3Shape
If the display device has a smooth surface to maintain good visual appearance, then aesthetics are improved, but ambient light reflection increases and image contrast decreases
Solution Approach 1:
The patent applies an anti-glare coating with specific optical properties (glossiness 4-35 GU, SCI reflectivity 3-6%) to the display panel surface. This local modification reduces ambient light reflection while maintaining acceptable visual appearance, resolving the contradiction between surface smoothness and anti-reflection performance.
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 image contrast and reduces device thickness and power consumption by diffusing and reflecting ambient light effectively, improving user comfort and efficiency.
Implementation Method 1
a glossiness of the first optical structure layer is between 4 GU and 35 GU, and a reflectivity of specular component included (SCI) of the first optical structure layer is between 3% and 6%
Implementation Method 2
ambient light from the outside irradiates the display device to generate reflected light
Data Source
AI summary
A display device, including a first display panel, a second display panel, and a first optical structure layer, is provided. The first display panel has a first display surface emitting light toward a first direction. The second display panel has a second display surface emitting light toward a second direction, wherein the first direction is different from the second direction. The first optical structure layer is disposed on the first display panel, wherein a glossiness of the first optical structure layer is between 4 GU and 35 GU, and a reflectivity of specular component included (SCI) of the first optical structure layer is between 3% and 6%. The display device provided by the disclosure can reduce the influence of ambient light from the outside on a displayed image.