Pixel Inductor Display Circuit for Higher Luminance Control
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Solution Overview
Problem
Existing display devices face challenges in achieving improved luminance due to limitations in current technologies for controlling light emission in pixels.
Innovation Solution
A display device is designed with a pixel structure that includes a primary inductor and a secondary inductor inductively coupled to each other, a pixel circuit to control current through the primary inductor using transistors, and a light emitting unit connected to the secondary inductor, allowing for controlled light emission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If conventional current control methods are used in display pixels, then device complexity is reduced, but luminance is insufficient due to contact resistance deterioration
Solution Approach 1:
The patent introduces a transformer as an intermediary component between the pixel circuit and light emitting unit. The transformer includes a primary inductor coupled to the pixel circuit and a secondary inductor coupled to the light emitting unit, enabling galvanic isolation while transferring energy. This mediator structure eliminates contact resistance issues while maintaining controllable luminance output.
Solution Approach 2:
The patent replaces direct electrical contact (mechanical/electrical connection) with electromagnetic induction. Instead of directly connecting the pixel circuit to the light emitting unit through conductive paths prone to contact resistance, the invention uses magnetic field coupling between primary and secondary inductors to transfer energy, substituting the mechanical/electrical contact system with an electromagnetic field-based system.
2Illumination intensity
If direct electrical connection is used between pixel circuit and light emitting unit, then device complexity is low, but contact resistance causes luminance deterioration
Solution Approach 1:
The transformer serves as an intermediary that eliminates direct electrical contact between the pixel circuit and light emitting unit. The primary inductor receives electrical signals from the pixel circuit and couples them magnetically to the secondary inductor, which then drives the light emitting unit. This intermediary structure removes the contact resistance problem entirely while maintaining reliable energy transfer.
3Illumination intensity
If not all light emitting elements are utilized, then device complexity is reduced, but luminance output is insufficient
Solution Approach 1:
The transformer acts as a buffer that can drive multiple light emitting elements simultaneously. By coupling the pixel circuit to the primary inductor and multiple light emitting elements to the secondary inductor, the system can utilize all available light emitting elements for enhanced luminance output while the transformer manages the electrical distribution.
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 enhances luminance by effectively controlling the current induced in the light emitting unit, reducing luminance deterioration caused by contact resistance, and allowing all light emitting elements to contribute to light emission.
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.