Electrochromic Array Substrate for Switchable Display Modes
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Solution Overview
Problem
OLED display panels can only achieve either non-transparent or transparent display modes, limiting their application in different scenarios such as TVs and windows.
Innovation Solution
An array substrate with pixel regions that can switch between transparent and non-transparent display modes under the action of an electric field, utilizing scanning lines, data lines, thin film transistors, and a color changing element like an electrochromic device to control light transmittance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If OLED display panel is designed for non-transparent display mode, then display brightness and contrast are improved, but transparency and background visibility deteriorate
Solution Approach 1:
The patent applies a color changing element (electrochromic device) that can dynamically change its optical properties between transparent and non-transparent states based on applied voltage. This dynamic switching capability allows the display panel to adapt between different display modes, resolving the contradiction between fixed brightness performance and adaptability to different usage scenarios.
Solution Approach 2:
The patent changes the optical parameters of the display panel by introducing a color changing element whose light transmittance can be controlled through voltage application. By adjusting the voltage applied to the electrochromic device, the display panel can transition between transparent and non-transparent states, thereby changing its display characteristics to suit different application scenarios.
2Adaptability or versatility
If OLED display panel is designed for transparent display mode, then background visibility is improved, but display brightness and contrast deteriorate
Solution Approach 1:
The color changing element provides dynamic control over the display's optical state, allowing it to switch between transparent and non-transparent modes as needed. This enables the display to maintain brightness and contrast when in non-transparent mode while preserving background visibility when in transparent mode, thus resolving the contradiction between these two opposing requirements.
Solution Approach 2:
By changing the voltage applied to the electrochromic device, the display panel can adjust its optical parameters to achieve either transparent or non-transparent state. This parameter control allows the system to optimize for either background visibility or display brightness depending on the application scenario.
3Ease of manufacture
If OLED display panel uses fixed transparent or non-transparent structure, then manufacturing simplicity is improved, but application versatility deteriorates
Solution Approach 1:
The patent introduces a color changing element that enables the display panel to perform multiple functions - both transparent and non-transparent display modes - within a single device structure. This multi-functionality allows the same display panel to be used in various application scenarios (TV, window, etc.) without requiring different structural designs, thus resolving the contradiction between manufacturing simplicity and application versatility.
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
Enables OLED display panels to adapt to different display states based on scenes, expanding their usage in various applications by allowing both transparent and non-transparent modes.
Implementation Method 1
a color changing element like an electrochromic device to control light transmittance
Data Source
AI summary
This invention discloses an array substrate, a display panel and a display device. The array substrate comprises a plurality of scanning lines and a first data line which are intersecting with each other to define a plurality of pixel regions; the pixel region with at least two situations: a transparent display mode and a non-transparent display mode in the electric field. The present invention can achieve different status in different scenes of the display panel and enlarges the scope of use of the display panel.