Display Panel Pixel Circuit for High-Resolution Leakage Reduction
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing emissive display devices face challenges in achieving high resolution while maintaining efficient power consumption and response speed.
Innovation Solution
A display panel design incorporating a pixel circuit with specific transistor and capacitor configurations, including a first transistor connected between a drive voltage line and a light emitting element, and multiple transistors and capacitors connected to data and scan lines, optimized for variable frequency operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the pixel circuit area is reduced to increase resolution, then the display resolution is improved, but the circuit complexity increases
Solution Approach 1:
The patent combines multiple capacitor electrodes (first capacitor electrode, second capacitor electrode, third capacitor electrode) and bridge electrodes into an integrated capacitor structure. This merging reduces the overall circuit area while maintaining the necessary electrical functions, thereby enabling higher resolution without proportionally increasing circuit complexity
Solution Approach 2:
The capacitor structure extends in the third dimension (vertical stacking) rather than only in the planar dimensions. By forming capacitors through vertical arrangement of electrodes at different heights, the circuit achieves higher capacitance values within a smaller footprint, reducing the area occupied by each pixel circuit
2Measurement precision
If the pixel circuit area is reduced to increase resolution, then the display resolution is improved, but the leakage current increases
Solution Approach 1:
The bridge electrodes serve as intermediary conductive structures that electrically connect the capacitor electrodes to the transistor terminals. These bridge electrodes are designed with optimized geometry and material properties to provide low-resistance connections while minimizing parasitic leakage paths, thereby reducing leakage current in the compact pixel circuit
Solution Approach 2:
The patent employs composite material structures in the transistor and capacitor fabrication, using multiple layers of dielectric and conductive materials with complementary properties. This composite approach enables better control of electrical characteristics, reducing leakage current while maintaining the reduced area necessary for high resolution
3Adaptability or versatility
If variable frequency operation is implemented to improve adaptability, then the operational efficiency is improved, but the circuit complexity increases
Solution Approach 1:
The pixel circuit is designed with dynamic characteristics that enable variable frequency operation. The capacitor structure and transistor configuration allow the circuit to adapt its timing and switching behavior based on the required frame rate, providing flexibility for different display modes without requiring additional complex control circuitry
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 design enhances resolution by minimizing the area occupied by pixel circuits, reducing leakage current, and improving operational efficiency through optimized voltage and scan line connections.
Implementation Method 1
an emissive display device displays images using light emitting diodes that generate light by recombination of electrons and holes
Data Source
AI summary
A display panel includes: an element layer including a light emitting element; and a circuit layer including: a first transistor connected between a first drive voltage line and the light emitting element and operating according to a potential of a first node; a second transistor connected between a data line and a second node; a third transistor connected between the first transistor and the first node; a first capacitor electrode connected to the first node; a second capacitor electrode connected to the second node and facing the first capacitor electrode to form a first capacitor; a third capacitor electrode facing the second capacitor electrode to form a second capacitor and connected to the first drive voltage line; a first bridge electrode electrically connecting the first capacitor electrode and the third transistor; and a second bridge electrode electrically connecting the second capacitor electrode and the second transistor.