Pixel Oscillator Layout for Uniform LED Alignment in Displays
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Solution Overview
Problem
Existing display devices face challenges in uniformly aligning subminiature light emitting elements across the substrate due to voltage drops, leading to non-uniform alignment and potential inefficiencies in light emission.
Innovation Solution
A display device design that includes a substrate with pixels comprising a first and second electrode, and light emitting elements connected between them, along with oscillators that convert DC voltage to AC voltage, ensuring uniform alignment of light emitting elements across the substrate by applying AC voltage uniformly to each pixel.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If DC voltage is applied to electrodes to align light emitting elements, then alignment is achieved, but voltage drops cause non-uniform alignment across the substrate
Solution Approach 1:
The patent converts the static DC voltage application into a dynamic AC voltage application. The oscillators generate AC signals that dynamically adjust the voltage distribution across the substrate, compensating for voltage drops and ensuring uniform alignment of light emitting elements throughout the entire display panel.
Solution Approach 2:
The patent divides the voltage generation function into multiple independent oscillators distributed across the substrate. Each oscillator serves a specific region, locally compensating for voltage drops without affecting other regions, thereby achieving uniform alignment across the entire substrate.
2Manufacturing precision
If oscillators are added to convert DC to AC voltage for uniform alignment, then alignment uniformity improves, but device complexity increases
Solution Approach 1:
The oscillators are designed to perform multiple functions: generating AC voltage for alignment, and potentially serving as part of the pixel driving circuitry. This multi-functionality reduces the need for separate alignment circuitry, thereby limiting the increase in overall device complexity.
3Manufacturing precision
If AC voltage is applied uniformly across the substrate, then light emitting elements align uniformly, but power consumption increases
Solution Approach 1:
The alignment process uses periodic AC voltage application rather than continuous DC voltage. The oscillators generate AC signals at specific frequencies that achieve alignment during particular phases of the AC cycle, allowing for energy-efficient periodic operation instead of continuous power consumption.
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 ensures uniform alignment and efficient light emission from light emitting elements, enhancing the display quality and reliability by maintaining consistent voltage supply across the entire display panel.
Implementation Method 1
oscillators that convert DC voltage to AC voltage, ensuring uniform alignment of light emitting elements across the substrate by applying AC voltage uniformly to each pixel
Implementation Method 2
If predetermined voltages are supplied to electrodes after light emitting elements are supplied to a substrate, an electric field is formed between the electrodes, so that the light emitting elements are self-aligned
Data Source
AI summary
A display device may include a substrate, pixels disposed on the substrate, each of the pixels including a first electrode, a second electrode, and a plurality of light emitting elements electrically connected between the first and the second electrodes, and a first oscillator disposed on the substrate and electrically connected to a first electrode of a first pixel of the pixels, the first oscillator including at least one transistor and at least one capacitor.