Double-Sided Display Panel with Light-Shielding Conductive Layer
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Solution Overview
Problem
Conventional display panels are primarily single-sided, failing to meet the need for two-way display in scenarios like digital signage, public exhibitions, and window industries where information needs to be visible from both sides.
Innovation Solution
A double-sided display panel is designed with a light-emitting device layer, a thin film transistor (TFT) layer, a light-shielding conductive layer, an electrochromic layer, and a light-transmitting conductive layer, where the TFTs control both the light-emitting devices and the electrochromic layer, enabling independent display on both sides while the light-shielding conductive layer prevents image interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a single-sided display panel is used, then the device complexity is low, but the display functionality is limited to one side only
Solution Approach 1:
The patent implements a nested multi-layer structure where the electrochromic layer is positioned between the light-emitting device layer and the light-transmitting conductive layer. This nesting arrangement allows the back side display to be embedded within the same panel structure as the front side display, enabling dual-sided functionality without requiring separate display panels.
Solution Approach 2:
The patent transitions from single-sided to double-sided display by utilizing the third dimension (depth/layers). By stacking multiple functional layers including the light-emitting device layer, TFT layer, light-shielding conductive layer, electrochromic layer, and light-transmitting conductive layer, the display functionality is extended to both front and back sides of the panel.
2Adaptability or versatility
If both front and back sides display images simultaneously, then the display versatility is improved, but image interference occurs between the two sides
Solution Approach 1:
The light-shielding conductive layer serves as an intermediary element positioned between the light-emitting device layer and the electrochromic layer. This intermediate layer blocks light from the front side display from reaching the electrochromic layer, thereby preventing image interference and allowing independent display content on both sides of the panel.
3Reliability
If a light-shielding conductive layer is added to prevent image interference, then image quality is improved, but the device complexity increases
Solution Approach 1:
The light-shielding conductive layer is designed to perform multiple functions simultaneously: it shields light to prevent image interference, serves as an electrode for the electrochromic layer, and provides structural support. This multi-functionality reduces the need for additional separate components, thereby limiting the increase in device complexity while achieving improved image quality.
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 allows for effective dual-sided display, enhancing visibility and reducing image interference, suitable for applications requiring information to be displayed from both front and back sides.
Implementation Method 1
an electrochromic layer disposed on a side of the first light-shielding conductive layer away from the TFT layer, and electrically connected to the first light-shielding conductive layer
Implementation Method 2
a light-emitting device layer including a plurality of light-emitting devices; a thin film transistor (TFT) layer disposed on a side of the light-emitting device layer, wherein the TFT layer includes a first TFT and a second TFT, and the first TFT is electrically connected to one of the light-emitting devices
Data Source
AI summary
A double-sided display panel, a method of manufacturing the double-sided display panel, and electronic equipment. In the double-sided display panel provided by an embodiment of the present application, by providing a light-emitting device layer on a front side of the panel and an electrochromic layer on a back side of the panel, front and back sides of the panel can achieve display effects. In addition, a first light-shielding conductive layer is also provided between the light-emitting device layer and the electrochromic layer, thereby improving the display effects of the front and back sides of the double-sided display panel.