Electro-variable Light Transmittance Material for Full-Screen Displays
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Solution Overview
Problem
Conventional display screens require polarizers to reduce ambient light interference, which limits their design flexibility and user experience by necessitating non-display regions for cameras and sensors, thereby reducing the screen-to-body ratio.
Innovation Solution
Incorporating an electro-variable light transmittance material in the display screen's light-emitting units that becomes light absorbent during power-on and light transmissive during power-off, eliminating the need for polarizers and allowing for full-screen displays and enhanced camera functionality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If polarizers are used to reduce ambient light interference, then display visibility is improved, but screen-to-body ratio deteriorates due to required non-display regions
Solution Approach 1:
The patent extracts and removes the polarizer component from the display structure. Instead of using polarizers to reduce ambient light interference, the invention employs a light-emitting unit with electro-variable light transmittance material that can actively control light transmission, eliminating the need for polarizers and enabling full-screen display without non-display regions.
Solution Approach 2:
The patent utilizes electro-variable light transmittance material that changes its optical parameters (light transmittance) in response to electrical signals. During power-on, the material becomes light absorbent to block ambient light; during power-off, it becomes light transmissive to allow ambient light through, dynamically adjusting the parameter to eliminate the need for polarizers.
2Reliability
If polarizers are used to reduce ambient light interference, then display performance is improved, but device complexity increases
Solution Approach 1:
The patent removes the polarizer component from the display structure, simplifying the overall device architecture. By replacing the passive polarizer with an active light-emitting unit containing electro-variable light transmittance material, the invention reduces structural complexity while maintaining or improving display performance through active ambient light management.
3Adaptability or versatility
If non-display regions are reserved for cameras and sensors, then camera functionality is ensured, but screen-to-body ratio deteriorates
Solution Approach 1:
The patent extracts and eliminates the requirement for non-display regions by removing polarizers. The light-emitting unit with electro-variable light transmittance material enables the entire screen area to function as both display and camera access region, allowing cameras and sensors to be positioned behind the full-screen display without requiring separate non-display openings.
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
This solution enables a full-screen display without polarizers, optimizing user experience by increasing the screen-to-body ratio and improving camera performance through reduced ambient light interference and enhanced light transmittance.
Implementation Method 1
an electro-variable light transmittance material located on a periphery of the pixel region, the electro-variable light transmittance material being light absorbable during a power on process, and being light transmissive during a power off process
Data Source
AI summary
The present application relates to a display screen and an electronic device. The display screen comprises a first display area for arranging a front device, wherein the first display area is provided with a first type of light-emitting unit; the first type of light-emitting unit comprises a pixel area and an electrochromic light transmittance material disposed around the pixel area; the electrochromic light transmittance material exhibits a light absorption property when being energized; and the electrochromic light transmittance material exhibits a light transmission property when not being energized. In addition, the present application also relates to an electronic device comprising the above-mentioned display screen.