OLED Display Panel with Electrochromic Color Compensation
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Solution Overview
Problem
Organic light emitting diode (OLED) display panels face deterioration issues due to the characteristics of organic light emitting materials, especially under high power usage, leading to reduced service life and increased energy consumption.
Innovation Solution
The implementation of an electrochromic element with a metallic oxide layer and metal layers in the OLED display panel, which performs oxidation-reduction electrochemical reactions to change reflectivity and transparency, allowing for color compensation and reducing the light emitting capacity of the OLEDs, thereby prolonging the service life and lowering energy consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If organic light emitting materials are used to achieve light emission in OLED display panels, then light weight and low power consumption characteristics are obtained, but the organic light emitting materials easily deteriorate during use especially under high power
Solution Approach 1:
The patent introduces an electrochromic element as an intermediary component between the OLED light emitting element and the display output. This electrochromic element modulates the light output and performs color compensation, allowing the OLED to operate at lower power levels while maintaining display quality. The electrochromic layer acts as a mediator that adjusts light transmission and color balance without requiring the OLED to directly produce full brightness output.
Solution Approach 2:
The patent utilizes parameter changes in the electrochromic material's optical properties through electrochemical reactions. By applying electrical signals to the electrochromic element, the light absorption and transmission characteristics are dynamically adjusted, enabling color compensation and brightness modulation. This allows the system to maintain perceived display quality while reducing the actual light emission demand on the OLED, thereby extending its service life.
2Illumination intensity
If high power is applied to organic light emitting materials to maintain display quality, then brightness and color accuracy are improved, but deterioration accelerates and service life reduces
Solution Approach 1:
The patent implements a dynamic system where the electrochromic element continuously adjusts its optical properties in response to control signals. This dynamic adjustment allows the system to maintain optimal brightness and color accuracy only when necessary, while operating at lower power levels during normal display conditions. The electrochromic layer's variable transmission characteristics enable real-time adaptation to different display requirements.
Solution Approach 2:
The electrochromic element serves as a light modulating intermediary that sits between the OLED and the viewer. It receives light from the OLED and selectively transmits or absorbs specific wavelengths based on electrochemical reactions. This mediation allows the system to achieve perceived high brightness and color accuracy without requiring the OLED to continuously operate at high power levels, thereby reducing deterioration.
3Reliability
If electrochromic element is added to perform oxidation-reduction electrochemical reactions for color compensation, then service life is extended and energy consumption is reduced, but device complexity increases
Solution Approach 1:
The electrochromic element is designed to perform multiple functions within a single integrated component. It simultaneously provides color compensation, brightness modulation, and light transmission control. The same electrochromic layer that changes optical properties through electrochemical reactions also serves as the primary mechanism for extending OLED service life by reducing operational stress. This multi-functionality reduces the need for separate compensation circuits and control mechanisms.
Solution Approach 2:
The patent merges the electrochromic material layer with the existing OLED structure, integrating the service life extension functionality into the display panel's native architecture. The electrochromic element is positioned within the existing light path and shares control electronics with the OLED driver circuitry. This merging approach avoids adding completely separate systems and minimizes structural complexity while achieving the desired service life extension and energy reduction benefits.
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 electrochromic element enhances the utilization of light and extends the service life of the OLED display panel by reducing the power required for light emission, while maintaining display quality through color compensation.
Implementation Method 1
an electrochromic layer 112 on a surface of the first metal layer 103 away from the substrate 200
Implementation Method 2
The electrochromic layer 112 performs oxidation-reduction electrochemical reactions to change reflectivity and transparency
Data Source
AI summary
An OLED display panel providing color compensation without overdriving light emitting units includes the light emitting units and a substrate. Each light emitting unit includes a light emitting element and an electrochromic element. The light emitting element is on a side of the electrochromic element away from the substrate. The electrochromic element includes first anode and cathode, and an electrochromic layer between them. The light emitting element includes second anode and cathode, and light emitting material between them. A portion of the second anode is shared with the first cathode. The present disclosure also provides a method for making such OLED display panel. The OLED display panel uses the electrochromic elements for color compensation, reducing the energy consumption of the display panel and prolonging service life.