OLED Display Pixel Circuit for Self-Powered Electricity Generation
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Solution Overview
Problem
Existing OLED displays face challenges in integrating electricity generation without increasing manufacturing costs or compromising their thin profile and low power consumption, as previous studies on combining OLEDs with organic solar cells require structural modifications.
Innovation Solution
An OLED display with a pixel driving circuit that separates organic light emitting diodes for image display mode and connects them for electricity generation mode, allowing the diodes to operate as both emission cells and solar cells without altering their structure, using a switching mechanism to connect anodes to a battery for charging during non-display modes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If OLED structure is modified to combine with organic solar cell, then electricity generation function is achieved, but manufacturing cost increases and thin profile is compromised
Solution Approach 1:
The OLED is designed to perform multiple functions: it serves as both a light-emitting display element and a photoelectric conversion device. By utilizing the same organic light emitting diode structure for both purposes, the patent eliminates the need for separate solar cell integration, thereby avoiding increased manufacturing complexity and structural modifications while achieving electricity generation capability
Solution Approach 2:
The OLED generates electricity for itself by converting ambient light into electrical energy through photoelectric conversion. This self-powered mechanism allows the display device to recharge its battery without external power sources or complex structural changes, maintaining the original simple OLED architecture while adding the electricity generation function
2Adaptability or versatility
If OLED structure is modified to combine with organic solar cell, then electricity generation function is achieved, but display device weight increases
Solution Approach 1:
The same OLED structure serves dual purposes as both display element and power generation device, eliminating the need to add separate solar cell components. This multi-functionality approach ensures that no additional weight is introduced while achieving the electricity generation function
Solution Approach 2:
The OLED performs photoelectric conversion using its existing structure to generate electricity for the display device. This self-service mechanism avoids adding external solar cell components, thereby preventing any increase in device weight while still enabling power generation capability
3Adaptability or versatility
If OLED structure is modified to combine with organic solar cell, then electricity generation function is achieved, but manufacturing cost increases
Solution Approach 1:
The OLED is designed to perform multiple functions: it serves as both a light-emitting display element and a photoelectric conversion device. By utilizing the same organic light emitting diode structure for both purposes, the patent eliminates the need for separate solar cell integration, thereby avoiding increased manufacturing complexity and structural modifications while achieving electricity generation capability
Solution Approach 2:
The OLED generates electricity for itself by converting ambient light into electrical energy through photoelectric conversion. This self-powered mechanism allows the display device to recharge its battery without external power sources or complex structural changes, maintaining the original simple OLED architecture while adding the electricity generation function
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 efficient electricity generation without changing the OLED structure, maintaining the display's thin profile and low power consumption, and increasing the solar cell efficiency by connecting all pixels as one organic solar cell during non-display modes.
Implementation Method 1
The OLED display implements an input image using a phenomenon in which the OLED emits light when electrons and holes are combined in an organic layer through a current flowing in a fluorescence or phosphorescence organic thin film
Implementation Method 2
The OLED display implements an input image using a phenomenon in which the OLED emits light when electrons and holes are combined in an organic layer through a current flowing in a fluorescence or phosphorescence organic thin film
Implementation Method 3
a pixel driving circuit configured to cause the organic light emitting diode to emit light depending on a data voltage of an input image in an image mode and supply a current generated in the organic light emitting diode to a battery in an electricity generation mode
Data Source
AI summary
An organic light emitting diode display is discussed. The organic light emitting diode display according to an embodiment a plurality of pixels configured to operate in an image mode for displaying images, and in an electricity generation mode for generating an electric current. Each pixel includes an organic light emitting diode and a pixel driving circuit. The pixel driving circuit electrically separates the corresponding light emitting diode from one or more adjacent organic light emitting diodes in the image mode, and electrically connects the corresponding light emitting diode to the one or more adjacent organic light emitting diodes in the electricity generation mode.