Transparent Display Panel Light Blocking for OLED Lifespan
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Solution Overview
Problem
Transparent OLED display devices, when used in vehicle-mounted sunroofs, face challenges in prolonging the service life of electroluminescent devices due to irradiation from ambient light, including ultraviolet light, which can cause damage and reduce their operational lifespan.
Innovation Solution
A transparent display panel design incorporating a light blocking part, such as a metal layer or a polymer film doped with an ultraviolet absorber, and an adjustable light-transmitting area with electrochromic layers, which can control light transmittance to prevent damage from ambient light and ensure user comfort by allowing external light to pass through when necessary.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the transparent display panel allows light to pass through for visibility, then transparency and user comfort are improved, but electroluminescent devices are damaged by ambient light irradiation and service life is reduced
Solution Approach 1:
The display panel is divided into distinct functional regions: a display area with electroluminescent devices for active light emission, and a light blocking part without electroluminescent devices that specifically blocks ambient light. This segmentation allows different parts of the panel to perform different functions - the display area provides visibility and transparency while the light blocking part protects against harmful irradiation.
Solution Approach 2:
Different regions of the transparent display panel are assigned different optical properties. The display area maintains high transparency to allow visibility, while the light blocking part has selective light blocking properties to prevent ambient light from reaching electroluminescent devices. This local differentiation of properties resolves the contradiction between overall transparency and localized protection.
2Reliability
If a light blocking part is added to protect electroluminescent devices, then service life is prolonged, but device complexity increases
Solution Approach 1:
The light blocking part is integrated directly into the display panel structure itself, merging the protection function with the existing panel architecture. Rather than adding a separate external protection system, the light blocking part becomes an inherent component of the panel, sharing structural and functional space with other elements to minimize overall complexity.
Solution Approach 2:
The light blocking part serves multiple functions simultaneously: it blocks harmful ambient light from reaching electroluminescent devices, maintains the transparency of the overall panel for visibility, and can be integrated with other panel components. This multi-functionality reduces the need for additional separate components, thereby limiting the increase in device complexity.
3Ease of operation
If electrochromic layers are used to control light transmittance, then user comfort and visibility are enhanced, but manufacturing complexity increases
Solution Approach 1:
The electrochromic layers enable dynamic control of light transmittance in the light blocking part, allowing the optical properties to be adjusted in real-time based on user needs or environmental conditions. This dynamic capability enhances ease of operation by providing adaptability, while the integration into the existing panel structure helps manage manufacturing complexity.
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 reduces damage to electroluminescent devices from ambient light, prolongs their service life, and enhances user experience by maintaining comfort and visibility while displaying images, even in high-intensity external light conditions.
Implementation Method 1
a polymer film doped with an ultraviolet absorber
Implementation Method 2
a first electrochromic layer located between the first electrode and the second electrode
Data Source
AI summary
Disclosed in the present disclosure are a transparent display panel and a display device, used for prolonging the service life of an electroluminescent device in the transparent display panel. According to the transparent display panel provided by the embodiment of the present disclosure, the transparent display panel is divided into a display area arranged in an array and a light-transmitting area surrounding the display area; the display area comprises a transparent substrate, an electroluminescent device positioned on the transparent substrate, and a light blocking part located on the side of the transparent substrate deviating from the electroluminescent device; the light blocking part is used for blocking light entering from the side of the transparent substrate deviating from the electroluminescent device to irradiate the electroluminescent device.