Micro LED Display Dual Gradation Voltage Control
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Solution Overview
Problem
Conventional display devices face challenges in achieving high definition and large-scale displays while maintaining efficient gradation voltage management, particularly in micro LED display devices where precise control of gradation voltages is necessary for optimal image quality and contrast ratio.
Innovation Solution
The implementation of a micro LED display device configuration that includes a plurality of pixels arranged in a matrix with shared gate and source lines, a first driver for controlling gate lines, and a second driver that selects and supplies gradation voltages from two distinct systems to the source lines, allowing for differential gradation voltage values for each gradation region, enabling improved luminance control and contrast ratio.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a single gradation voltage system is used in micro LED display devices, then the device complexity is reduced, but the luminance control precision and contrast ratio deteriorate
Solution Approach 1:
The patent divides the gradation voltage system into multiple independent voltage generation circuits (first gradation voltage generation circuit and second gradation voltage generation circuit), each capable of generating different voltage levels. This segmentation allows precise control of luminance by selecting appropriate voltage systems for different display regions, thereby improving luminance control precision while managing device complexity through modular design
Solution Approach 2:
The patent applies different gradation voltage systems to different display regions based on local requirements. By generating first gradation voltages for certain regions and second gradation voltages for other regions, the system optimizes luminance control precision locally, ensuring high contrast ratios in specific areas while maintaining overall system functionality
2Reliability
If multiple gradation voltage systems are implemented, then the contrast ratio is improved, but the ease of operation deteriorates
Solution Approach 1:
The patent designs both gradation voltage generation circuits to share common functional architecture and control mechanisms. The voltage selection is managed through unified control signals that can switch between first and second gradation voltage systems, allowing the system to maintain high contrast ratios through multiple voltage options while preserving ease of operation through standardized control interfaces
Solution Approach 2:
The patent implements dynamic selection between different gradation voltage systems based on display content requirements. The system can adaptively switch between first and second gradation voltage generation circuits during operation, optimizing contrast ratios for different image scenarios while maintaining operational simplicity through automated voltage selection logic
3Manufacturing precision
If minute micro LEDs are mounted in large numbers, then the definition is improved, but the manufacturing precision requirements increase
Solution Approach 1:
The patent divides the display device into multiple pixel units with shared gate and source lines, creating a modular structure. This segmentation allows minute micro LEDs to be mounted in precise locations within each pixel while reducing overall manufacturing complexity through repetitive, standardized pixel patterns that can be manufactured using conventional processes
Solution Approach 2:
The patent combines multiple micro LEDs within each pixel structure and shares gate lines and source lines across multiple pixels. This merging approach reduces the total number of electrical connections required, thereby lowering manufacturing precision requirements for wiring while still achieving high definition through the dense arrangement of minute micro LEDs
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 display quality by allowing for sub-frame periods with lower luminance levels and improved contrast ratios, effectively addressing the limitations of conventional display devices in managing gradation voltages for high-definition and large-scale displays.
Implementation Method 1
a light emitting diode 30 which emits light in response to application of a drive current
Data Source
AI summary
According to one embodiment, a display device includes pixels, gate lines, source lines, a first driver, and a second driver selecting a gradation voltage corresponding to a gradation value of input image data from either of a plurality of gradation voltages of a first system and gradation voltages of a second system, and supplying the selected gradation voltage to the corresponding source line of the plurality of source lines. In at least a gradation region of all gradation regions of the image data, a value of the corresponding gradation voltage of the second system is relatively different from a value of the corresponding gradation voltage of the first system, for each of same gradation values.