OLED Pixel Circuit for Low-Frequency 3D Display
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Solution Overview
Problem
Conventional organic light emitting displays require high driving frequencies to achieve 3D imaging, leading to increased power consumption, reduced stability, and higher manufacturing costs.
Innovation Solution
A pixel design incorporating multiple transistors and capacitors that allows for low driving frequency operation by alternately charging data signals and controlling current flow through an organic light emitting diode, enabling 3D image display while minimizing power consumption and improving stability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If high driving frequency is used to achieve 3D imaging, then 3D image display capability is improved, but power consumption increases and stability decreases
Solution Approach 1:
The pixel circuit is divided into multiple functional blocks including first and second light emitting units with separate driving transistors (first and second driving transistors), capacitors for different voltage storage (first, second, and third capacitors), and control transistors (third, fourth, fifth, and sixth transistors). This segmentation allows independent control of different voltage levels and current paths, enabling 3D image display at lower frequencies by properly managing power supply to each segment during different time periods.
Solution Approach 2:
The circuit performs preliminary charging of capacitors (first, second, and third capacitors) with appropriate voltages before the light emitting period. The first and second driving transistors are pre-configured with proper gate voltages through the control transistors and capacitors during the non-emission period. This preliminary preparation allows the pixel to operate at lower driving frequencies by having all necessary voltage levels and current paths ready before emission begins, eliminating the need for high-frequency switching.
2Adaptability or versatility
If high driving frequency is used to achieve 3D imaging, then 3D image display capability is improved, but manufacturing cost increases
Solution Approach 1:
The pixel circuit is divided into multiple functional blocks including first and second light emitting units with separate driving transistors (first and second driving transistors), capacitors for different voltage storage (first, second, and third capacitors), and control transistors (third, fourth, fifth, and sixth transistors). This segmentation allows independent control of different voltage levels and current paths, enabling 3D image display at lower frequencies by properly managing power supply to each segment during different time periods.
Solution Approach 2:
The circuit performs preliminary charging of capacitors (first, second, and third capacitors) with appropriate voltages before the light emitting period. The first and second driving transistors are pre-configured with proper gate voltages through the control transistors and capacitors during the non-emission period. This preliminary preparation allows the pixel to operate at lower driving frequencies by having all necessary voltage levels and current paths ready before emission begins, eliminating the need for high-frequency switching.
3Adaptability or versatility
If high driving frequency is used to achieve 3D imaging, then 3D image display capability is improved, but stability decreases
Solution Approach 1:
The pixel circuit is divided into multiple functional blocks including first and second light emitting units with separate driving transistors (first and second driving transistors), capacitors for different voltage storage (first, second, and third capacitors), and control transistors (third, fourth, fifth, and sixth transistors). This segmentation allows independent control of different voltage levels and current paths, enabling 3D image display at lower frequencies by properly managing power supply to each segment during different time periods.
Solution Approach 2:
The circuit performs preliminary charging of capacitors (first, second, and third capacitors) with appropriate voltages before the light emitting period. The first and second driving transistors are pre-configured with proper gate voltages through the control transistors and capacitors during the non-emission period. This preliminary preparation allows the pixel to operate at lower driving frequencies by having all necessary voltage levels and current paths ready before emission begins, eliminating the need for high-frequency switching.
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 enables 3D image display at a reduced driving frequency of 120 Hz, reducing power consumption and manufacturing costs while maintaining image quality and stability.
Implementation Method 1
an organic light emitting diode (OLED)
Data Source
AI summary
A pixel capable of being driven at a low driving frequency that includes an organic light emitting diode (OLED), a first transistor for controlling an amount of current supplied from a first power supply coupled to a first electrode thereof to the OLED to correspond to a voltage applied to a first node, a second transistor coupled between a data line and a second node and turned on when a scan signal is supplied to a scan line, a third transistor coupled between the first node and the second node and turned on when a second control signal is supplied to a second control line, a first capacitor coupled between the second node and a fixed voltage source, and a second capacitor and a third capacitor serially coupled between the first node and the first power supply.