Foldable Screen Light-Shielding Layer for Display Area Control
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Solution Overview
Problem
Electronic devices with foldable screens face challenges in maximizing the screen-to-body ratio, particularly due to the light-shielding layer blocking display content during different folding states.
Innovation Solution
A foldable screen design with a light-shielding layer positioned between a light-transmitting cover plate and a display panel, where the screen can be controlled to enter a black screen state when not in use, ensuring the light-shielding layer does not obstruct the display region, and a controller adjusts the screen state based on detected angles to optimize the screen-to-body ratio.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If a light-shielding layer is added to block light in the non-display region, then light leakage is prevented, but the display region is blocked when the screen is folded
Solution Approach 1:
The patent applies the dynamics principle by making the light-shielding layer movable rather than fixed. The light-shielding layer can dynamically adjust its position based on the screen's folding state, moving to cover the non-display region when folded and retracting when unfolded, thus preventing light leakage during folding while avoiding blocking the display region during normal use
Solution Approach 2:
The patent segments the screen structure into distinct functional regions: a display region, a non-display region, and a movable light-shielding layer. This segmentation allows the light-shielding layer to be independently controlled and positioned, enabling it to selectively cover only the non-display region when needed without interfering with the display region
2Area of moving object
If the screen-to-body ratio is increased by reducing the non-display region, then display area is improved, but light leakage becomes more problematic when folded
Solution Approach 1:
The movable light-shielding layer dynamically responds to the screen's folding state, extending to cover the reduced non-display region when folded and retracting when unfolded. This dynamic adjustment allows the screen to maintain a high screen-to-body ratio with minimal non-display region while still preventing light leakage during folding through the adaptive light-shielding mechanism
Data Source
AI summary
An electronic device includes the foldable screen and a controller. The foldable screen includes a light-transmitting cover plate and a display panel that are stacked. The display panel includes a display region and a non-display region surrounded by the display region, and a light-shielding layer is arranged between the light-transmitting cover plate and the display panel. The foldable screen is foldable between a first state and a second state. When the foldable screen is in the first state, an orthographic projection of the light-shielding layer on the display panel overlaps with the non-display region and does not overlap with the display region. When the foldable screen is in the second state, the controller is configured to control a first part in the display region adjacent to and surrounding the non-display region to be in a black screen state.