Reflective Pixel Segmentation for Outdoor Display Visibility
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Solution Overview
Problem
Existing display devices face challenges in maintaining high light efficiency and achieving a slim profile due to the use of polarization films, which reduce light emission and are difficult to manufacture in thin forms, while color filters offer higher light efficiency but are thicker than necessary for thin displays.
Innovation Solution
A display device design featuring a substrate with both first and second pixels, where the first pixels reflect external light to display icon outlines and the second pixels include color filters, allowing for separate control of main and auxiliary display units, with the auxiliary unit being curved and driven independently to enhance outdoor visibility and power efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If a polarization film is used to suppress reflection of ambient light, then outdoor visibility is improved, but light efficiency degrades and the display device becomes thicker
Solution Approach 1:
The display device is divided into two distinct pixel types: first pixels without color filters that reflect external light to display icon outlines, and second pixels with color filters that emit colored light for main display content. This segmentation allows each pixel type to be optimized for its specific function, resolving the contradiction between visibility and light efficiency.
Solution Approach 2:
Different regions of the display have different optical properties. The first pixels have high reflectivity for external light to show icons clearly in outdoor conditions, while the second pixels have color filters optimized for light emission and color display. This local differentiation of optical characteristics resolves the contradiction by applying the right property in the right location.
2Illumination intensity
If a polarization film is used to suppress reflection of ambient light, then outdoor visibility is improved, but the display device becomes thicker and more difficult to manufacture
Solution Approach 1:
The display structure is segmented into first pixels without color filters and second pixels with color filters. By removing the polarization film and using this segmentation, the overall display device thickness is reduced while maintaining outdoor visibility through the reflective properties of the first pixels.
Solution Approach 2:
The invention eliminates the need for a thick polarization film by using thin reflective layers in the first pixels and optimized color filter layers in the second pixels. This approach achieves the desired outdoor visibility with a much thinner overall structure, resolving the thickness contradiction.
3Use of energy by moving object
If color filters with sufficient thickness are used to achieve high light efficiency, then light efficiency improves, but the display device becomes thicker
Solution Approach 1:
The display is segmented into first pixels without color filters and second pixels with color filters. This segmentation allows the color filters in the second pixels to be optimized for light efficiency without unnecessarily increasing the thickness of the entire display device, since the first pixels do not require color filters.
Solution Approach 2:
Color filters are applied locally only to the second pixels where color emission is required, rather than uniformly across the entire display. This local application optimizes light efficiency in the necessary regions while minimizing the overall thickness of the display device.
4Illumination intensity
If the auxiliary display unit is curved and separately driven, then outdoor visibility and power efficiency are enhanced, but device complexity increases
Solution Approach 1:
The display is segmented into a main display unit and an auxiliary display unit that can be independently controlled. The auxiliary display unit, which contains icon-shaped first pixels, can be driven separately to display important information clearly in outdoor conditions, while the main display handles other content. This segmentation enhances outdoor visibility without requiring complex integrated control systems.
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 display device continuously displays icon outlines in both driving and non-driving states without power consumption, improving light efficiency and image quality, and enhances outdoor visibility by varying color filter thickness, achieving a slim profile while maintaining high visibility.
Implementation Method 1
each of the first pixels includes a first reflective layer and a first emission layer and is configured to reflect external light so as to display the outline of an icon
Implementation Method 2
Color filters typically include a red filter, a green filter, and a blue filter and absorb remaining color components to reduce the reflection of external light
Data Source
AI summary
A display device is disclosed. In one aspect, the display device includes a substrate and a plurality of first pixels and a plurality of second pixels formed on the substrate. Each of the first pixels includes a first reflective layer and a first emission layer and is configured to reflect external light so as to display the outline of an icon. Each of the second pixels includes a second reflective layer, a second emission layer, and a color filter.