Subpixel Segmentation for Enhanced Gray Scale Control
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Solution Overview
Problem
Wearable devices face limitations in displaying gray levels due to the use of Serial Peripheral Interface (SPI) signals, which are restricted to high or low levels, making it impossible to control display gray levels directly.
Innovation Solution
A display panel design where each subpixel is divided into multiple sub-subpixels, allowing for different gray scales by turning on or off specific sub-subpixels, with a layout that includes multiple gate lines and data lines configured to control these sub-subpixels, enabling increased gray scale and color representation without increasing the number of data lines or gate lines.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If each subpixel is divided into multiple sub-subpixels to increase gray scale control, then the display gray level capability is improved, but the device complexity increases
Solution Approach 1:
Each subpixel is divided into multiple sub-subpixels (e.g., first, second, third sub-subpixels) that can be independently controlled. This segmentation allows for finer gray level control by selectively turning on or off specific sub-subpixels, thereby increasing the display gray level capability without requiring additional data lines or gate lines.
Solution Approach 2:
Multiple sub-subpixels are combined within each subpixel structure and controlled by shared gate lines. The gate lines are grouped such that multiple gate lines control multiple sub-subpixels simultaneously, reducing the total number of gate lines needed while maintaining enhanced gray level control capability.
2Measurement precision
If the number of data lines and gate lines is increased to control more sub-subpixels, then the gray scale control capability is improved, but the device complexity and area increase
Solution Approach 1:
Each data line is designed to serve multiple sub-subpixels across different subpixels. A single data line can provide data signals to multiple sub-subpixels by working in conjunction with different gate line combinations, thereby reducing the total number of data lines required while maintaining enhanced gray scale control.
Solution Approach 2:
The patent introduces a temporal dimension to the control mechanism by using sequential gating. Multiple sub-subpixels are controlled by the same data line at different time intervals through different gate line combinations, effectively increasing control capability without proportionally increasing the number of physical data lines.
3Illumination intensity
If a total reflection sub-subpixel is added to improve display brightness, then the display brightness is improved, but the device complexity increases
Solution Approach 1:
One specific sub-subpixel (e.g., the third sub-subpixel) is designed with total reflection characteristics while other sub-subpixels maintain different optical properties. This localized differentiation allows the reflective sub-subpixel to enhance display brightness in low refresh rate modes without requiring all sub-subpixels to have enhanced brightness capabilities, thereby limiting the increase in device 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 design enhances the display panel's ability to show a greater range of colors and gray scales, improving user experience by increasing the number of controllable sub-subpixels without adding more data lines or gate lines, and also improves display brightness in low refresh rate modes through the use of a total reflection sub-subpixel.
Implementation Method 1
improves display brightness in low refresh rate modes through the use of a total reflection sub-subpixel
Data Source
AI summary
A display panel is disclosed, including a plurality of data lines, a plurality of groups of gate lines and a plurality of pixel units. Each group of gate lines includes at least three gate lines. The pixel units are arranged in an array, each pixel unit includes a plurality of subpixels, and each subpixel includes at least two sub-subpixels. Each row of subpixels is configured to be controlled by a corresponding group of gate lines, and each column of subpixels is configured such that the at least two sub-subpixels receive a data signal from a corresponding data line under a control of each group of gate lines. A display device including the display panel is also disclosed.