Electrochromic Layer Brightness Compensation in Stretchable Displays
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Solution Overview
Problem
Stretchable display panels experience a decrease in display brightness when stretched, leading to differences in brightness before and after stretching, which negatively affects the user's viewing experience.
Innovation Solution
A display panel comprising a flexible substrate, pixel islands, an electrochromic layer, and force sensors, where the electrochromic layer is switched between transparent and opaque states based on the stretching length of flexible connection lines detected by the force sensors, thereby adjusting light transmittance to maintain consistent brightness.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the display panel is stretched to increase flexibility and adaptability, then the adaptability is improved, but the display brightness decreases
Solution Approach 1:
The patent applies an electrochromic layer that can change its optical properties (from transparent to opaque) in response to electrical signals. This allows the display panel to dynamically adjust its light transmittance and maintain consistent display brightness whether stretched or not, resolving the contradiction between flexibility and brightness stability
Solution Approach 2:
The patent incorporates force sensors that detect the stretching state of the display panel and provide feedback signals. Based on this feedback, the control circuit adjusts the electrochromic layer's state accordingly, creating a closed-loop system that maintains display brightness consistency across different stretching conditions
2Adaptability or versatility
If the distance between adjacent pixels is increased to enable stretching, then the flexibility is improved, but the display brightness decreases
Solution Approach 1:
The electrochromic layer changes its optical density dynamically. When the display is stretched and pixel density decreases, the electrochromic layer adjusts its transparency to compensate, maintaining consistent perceived brightness. This resolves the contradiction by allowing physical stretching while optically compensating for the reduced pixel density
Solution Approach 2:
The patent changes the optical parameters (transmittance, absorbance) of the electrochromic layer based on the stretching state. By dynamically adjusting these optical parameters in response to mechanical deformation, the system maintains display brightness consistency despite changes in physical configuration
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 effectively maintains consistent display brightness across stretching and non-stretching states, improving user experience by avoiding display non-uniformity and enhancing light transmittance capacity.
Implementation Method 1
The electrochromic layer is disposed around a periphery of each of the plurality of pixel islands and is configured to be switched between a transparent state and an opaque state
Implementation Method 2
Each of the plurality of force sensors is disposed on a corresponding one of the plurality of flexible connection lines, configured to detect a stretching length of the corresponding one of the plurality of flexible connection lines
Data Source
AI summary
A display panel, a display device, and an electronic device are disclosed. The display panel includes a flexible substrate, a plurality of pixel islands, an electrochromic layer, and a plurality of force sensors. In response to a stretching length of a corresponding one of a plurality of flexible connection lines being greater than a preset value, each of the plurality of force sensors is configured to enable the electrochromic layer to be switched to a transparent state to allow light emitted from the display panel to pass therethrough. In response to the stretching length of the corresponding one of the plurality of flexible connection lines being less than the preset value, each of the plurality of force sensors is configured to enable the electrochromic layer to be switched to an opaque state to block the light emitted from the display panel.