Inductive Pixel Circuit for Higher-Luminance Display Emission
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing display devices face challenges in achieving improved luminance and efficiency in light emission due to contact resistance and defects in conductive layers between transistors and light emitting elements.
Innovation Solution
The display device incorporates a primary inductor and a secondary inductor that are inductively coupled, with a pixel circuit controlling current flow through the primary inductor using transistors, and a light emitting unit connected to the secondary inductor, featuring a unique configuration of light emitting elements and sub-inductors to alternately direct current in different directions, reducing contact resistance and enhancing light emission efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conductive layers are used to connect transistors and light emitting elements, then electrical connection is established, but contact resistance and defects occur reducing light emission efficiency
Solution Approach 1:
The patent introduces an inductive coupling mechanism as an intermediary between the pixel circuit and light emitting unit. The primary inductor in the pixel circuit magnetically couples with the secondary inductor in the light emitting unit, enabling wireless power transfer and eliminating direct physical contact between conductive layers, thereby removing contact resistance issues
2Illumination intensity
If current flows through light emitting elements, then light emission occurs, but stress on individual elements causes deterioration
Solution Approach 1:
The patent divides the light emitting unit into multiple light emitting elements (first, second, third, and fourth light emitting elements) that can be independently controlled. By segmenting the light emission function across multiple elements, the stress on each individual element is reduced, extending their operational lifespan while maintaining overall luminance
Solution Approach 2:
The patent implements periodic switching of current direction through the light emitting elements using the inductive coupling mechanism. The primary inductor receives periodic drive signals that generate alternating magnetic fields, causing current to flow through different light emitting elements in different time periods, allowing elements to rest and reducing cumulative stress
3Illumination intensity
If conventional direct connection is used between pixel circuit and light emitting unit, then structure is simple, but luminance improvement is limited
Solution Approach 1:
The patent introduces inductors as intermediary components between the pixel circuit and light emitting unit. The primary inductor and secondary inductor create a magnetic coupling field that transfers energy wirelessly, improving luminance by enabling more efficient power delivery while the modular inductor design keeps the structural complexity manageable
Solution Approach 2:
The patent uses periodic drive signals applied to the primary inductor to generate alternating magnetic fields that induce current in the secondary inductor. This periodic action enables bidirectional current flow through different light emitting elements, improving overall luminance output while using simple repetitive signal patterns that don't significantly increase control 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
This configuration allows all light emitting elements to contribute to light emission, improving luminance and reducing stress on individual elements, resulting in enhanced light emission efficiency and reduced deterioration.
Implementation Method 1
a primary inductor and a secondary inductor that are inductively coupled to each other
Data Source
AI summary
A display device includes a pixel including a primary inductor and a secondary inductor that are inductively coupled to each other, a pixel circuit electrically connected to the primary inductor, and configured to control a current flowing through the primary inductor by using at least one transistor, and a light emitting unit electrically connected to the secondary inductor, and including at least one light emitting element.