Photochromic Electrode for Full-Screen Display Sensing
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Solution Overview
Problem
Current display technologies face challenges in achieving a high screen-to-body ratio while maintaining aesthetics, as traditional designs require non-display regions for light sensing elements, which hinder the realization of a true full screen display.
Innovation Solution
A display panel with a second display region incorporating photochromic electrodes that switch between transparent and opaque states, allowing the light sensing element to be invisible during normal display and visible when needed for improved imaging, thereby increasing the screen-to-body ratio and enabling a full screen effect.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a non-display region is designed on the top of the screen to accommodate light sensing elements, then the light sensing element can receive sufficient light, but the screen-to-body ratio is reduced and aesthetics are affected
Solution Approach 1:
The second electrode is designed with photochromic material that can dynamically change its light transmittance between different states. When the light sensing element needs to receive light, the electrode becomes transparent; when normal display is needed, it becomes opaque. This dynamic property allows the same region to serve both display and light sensing functions, eliminating the need for separate non-display regions and achieving true full-screen display while maintaining light sensing capability
Solution Approach 2:
The patent changes the optical parameter (light transmittance) of the second electrode by incorporating photochromic material. The electrode can switch between different transmittance states based on the operational mode, allowing it to function as both a display electrode and a light-sensitive component. This parameter change enables the light sensing element to receive sufficient light without requiring a dedicated non-display region, thereby maintaining the full-screen display area
2Reliability
If the second electrode is made transparent to allow light passage to the light sensing element, then imaging quality improves, but display performance deteriorates
Solution Approach 1:
The second electrode incorporates photochromic material that enables dynamic switching between transparent and opaque states. When imaging is required, the electrode transitions to a transparent state, allowing external light to pass through to the light sensing element, thereby improving imaging quality. When display is required, it transitions to an opaque state to maintain display brightness and contrast. This dynamic state change resolves the contradiction between transparent light transmission and display performance
Solution Approach 2:
The electrode undergoes periodic switching between transparent and opaque states based on operational requirements. During imaging modes, it periodically becomes transparent to allow light passage; during display modes, it periodically becomes opaque to maintain display quality. This periodic action between different optical states allows the system to optimize for either imaging or display performance as needed, resolving the contradiction between the two functions
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 the display panel's performance by allowing the light sensing element to receive sufficient light and improve imaging quality while maintaining a full screen display, addressing the aesthetic and functional limitations of traditional designs.
Implementation Method 1
the photochromic layer includes a photochromic material. The second electrode includes a first state and a second state, and a light transmittance of the second electrode in the first state is greater than a light transmittance of the second electrode in the second state.
Data Source
AI summary
Provided are a display panel and display device. The display panel includes a first display region and a second display region adjacent to the first display region. The second display region includes multiple first light-emitting elements, the first light-emitting element includes a first electrode, a second electrode and a light-emitting layer located between the first electrode and the second electrode, a direction from the light-emitting layer to the first electrode is a light exit direction of the display panel, the second electrode includes a photochromic layer, the photochromic layer includes a photochromic material, the second electrode includes a first state and a second state, and a light transmittance of the second electrode in the first state is greater than a light transmittance of the second electrode in the second state.